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Oregon State University
1.
Teters, Chad N.
The transient electric birefringence of nanomaterials: alignment mechanism, characterization, and its application towards aligned polymer nanocomposites.
Degree: PhD, Chemistry, 2009, Oregon State University
URL: http://hdl.handle.net/1957/12851
► The experimental and theoretical bases of transient electric birefringence (TEB) and its application in a variety of nanomaterials, including Na-montmorillonite, cellulose nanocrystals (CNXL), and CdSe…
(more)
▼ The experimental and theoretical bases of transient electric
birefringence (TEB) and its application in a variety of nanomaterials, including Na-montmorillonite, cellulose nanocrystals (CNXL), and CdSe quantum dots (QDs) will be presented. TEB is a phenomenon attributed to the alignment of particles in response to an applied electric field and has been used for the determination of particle sizes, optical anisotropies, polarizability anisotropies ∆α, and permanent dipole moments μ. In this thesis, I will present the relations between the physical parameters just mentioned and the experimental measurements of the rise, saturation, and decay of particle alignment. Detailed experimental setup and data analysis procedures will also be discussed. In the case of Na-montmorillonite, our findings imply a wide size and shape distribution and that the shape of the material is best modeled somewhere between a rod and a disk. The alignment mechanism was dominated by an induced-dipole, with some of the data suggesting the presence of a small permanent dipole; however, the later findings were inconclusive. CNXL, on the other hand, is shown to be polydisperse only in size and is modeled well as a rigid rod. At intermediate field strength, the alignment response was governed by both an induced (~95%) and permanent moment (~5%). CNXL was also shown to produce very large
birefringence, owing to its equally large optical anisotropy. CdSe QDs are nearly monodisperse in both size and shape, and are an ideal representation of a rigid rod. Their alignment mechanism contained a large permanent dipole contribution (~88%), which is attributed to their wurtzite crystalline structure. In the last chapter, preliminary results on nanocomposites containing carbon nanotubes (CNTs) and QDs are presented. Results for the nanoparticles in polylaurylmethacrylate are promising. TEM images of both composites showed a net alignment of particles in the field direction. However, aggregation of the CNTs in the polymer was a problem and further work is needed to keep them adequately exfoliated during the curing process. Aggregation of the QDs was not observed.
Advisors/Committee Members: Kong, Wei (advisor), Nibler, Joseph (committee member).
Subjects/Keywords: Birefringence; Refraction, Double – Mathematical models
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APA (6th Edition):
Teters, C. N. (2009). The transient electric birefringence of nanomaterials: alignment mechanism, characterization, and its application towards aligned polymer nanocomposites. (Doctoral Dissertation). Oregon State University. Retrieved from http://hdl.handle.net/1957/12851
Chicago Manual of Style (16th Edition):
Teters, Chad N. “The transient electric birefringence of nanomaterials: alignment mechanism, characterization, and its application towards aligned polymer nanocomposites.” 2009. Doctoral Dissertation, Oregon State University. Accessed February 27, 2021.
http://hdl.handle.net/1957/12851.
MLA Handbook (7th Edition):
Teters, Chad N. “The transient electric birefringence of nanomaterials: alignment mechanism, characterization, and its application towards aligned polymer nanocomposites.” 2009. Web. 27 Feb 2021.
Vancouver:
Teters CN. The transient electric birefringence of nanomaterials: alignment mechanism, characterization, and its application towards aligned polymer nanocomposites. [Internet] [Doctoral dissertation]. Oregon State University; 2009. [cited 2021 Feb 27].
Available from: http://hdl.handle.net/1957/12851.
Council of Science Editors:
Teters CN. The transient electric birefringence of nanomaterials: alignment mechanism, characterization, and its application towards aligned polymer nanocomposites. [Doctoral Dissertation]. Oregon State University; 2009. Available from: http://hdl.handle.net/1957/12851
2.
Lindamood, Lindsey R.
Determining texture in materials using laser ultrasonic methods.
Degree: 2013, Johns Hopkins University
URL: http://jhir.library.jhu.edu/handle/1774.2/37044
► When the microstructure of a material has directional variation in elastic stiffness, such as a transversely isotropic material, ultrasonic waves propagate at different speeds when…
(more)
▼ When the microstructure of a material has directional variation in elastic stiffness, such as a transversely isotropic material, ultrasonic waves propagate at different speeds when traveling along different directions through the material. Much of the research using ultrasound to measure the texture of materials relies not only on the polarization of the traveling wave but also on the direction of propagation relative to the preferred orientation of the material. The research in this thesis focuses on changing the polarization direction of the ultrasonic pulse, specifically the shear wave, and maintaining the wave’s propagation direction. The key experimental arrangement uses a laser line source to generate longitudinal and shear waves simultaneously in the through-thickness direction of a plate-like sample. The line source enables us to give directionality to the ultrasonic pulse and change the polarization by rotating the line. We show how the texture of the material
influences the propagation of the ultrasound. We also have experimental evidence that early fatigue damage can cause shear
birefringence. Finding the exact locations of microcracking in fatigued materials with the traditional ultrasonic methods is difficult. Understanding how texture may alter results will help to better identify the microscopic changes that are occurring within these fatigued materials. The experimental results show that changes in wavespeed relative to the rolling direction provide information on preferred orientation and stiffness. This dissertation shows how the derivation of velocities in a single cubic crystal can be used in the orientation distribution function to generate the velocities in a material with cubic crystallites and orthorhombic symmetry. Comparing experimental velocity results to theory allows for the generation of texture coefficients using those velocity measurements.
Advisors/Committee Members: Ghosh, Somnath (advisor).
Subjects/Keywords: laser ultrasonics;
texture;
birefringence
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APA ·
Chicago ·
MLA ·
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CSE |
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APA (6th Edition):
Lindamood, L. R. (2013). Determining texture in materials using laser ultrasonic methods. (Thesis). Johns Hopkins University. Retrieved from http://jhir.library.jhu.edu/handle/1774.2/37044
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Chicago Manual of Style (16th Edition):
Lindamood, Lindsey R. “Determining texture in materials using laser ultrasonic methods.” 2013. Thesis, Johns Hopkins University. Accessed February 27, 2021.
http://jhir.library.jhu.edu/handle/1774.2/37044.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
Lindamood, Lindsey R. “Determining texture in materials using laser ultrasonic methods.” 2013. Web. 27 Feb 2021.
Vancouver:
Lindamood LR. Determining texture in materials using laser ultrasonic methods. [Internet] [Thesis]. Johns Hopkins University; 2013. [cited 2021 Feb 27].
Available from: http://jhir.library.jhu.edu/handle/1774.2/37044.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
Lindamood LR. Determining texture in materials using laser ultrasonic methods. [Thesis]. Johns Hopkins University; 2013. Available from: http://jhir.library.jhu.edu/handle/1774.2/37044
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Universidade Estadual de Campinas
3.
Moreira, Danna Mota.
Influência de substâncias químicas auxiliares de uso endodôntico e agentes redutores nas propriedades biomecânicas da dentina radicular: Effects of reducing agents and endodontics auxiliary chemical solutions on biomechanical properties of root dentin.
Degree: 2011, Universidade Estadual de Campinas
URL: http://repositorio.unicamp.br/jspui/handle/REPOSIP/289790
► Abstract: Among the auxiliary chemical substances used in Endodontics during chemical-mechanical preparation, sodium hypochlorite (NaOCl) and EDTA have been the most widely recommended. However, irrigant…
(more)
▼ Abstract: Among the auxiliary chemical substances used in Endodontics during chemical-mechanical preparation, sodium hypochlorite (NaOCl) and EDTA have been the most widely recommended. However, irrigant solutions used in endodontic therapy might yield changes in the chemical and physical properties of dentin. Besides, these reagents compromised the bond strengths of some adhesives on root dentin. The aim of the first study was to evaluate the effect of 10% acid ascorbic or 10% sodium ascorbate on organic matrix collagen of bovine dentin root canal walls after irrigation with 5.25% sodium hypochlorite, 17% EDTA or 0.9% sodium chloride. Eighty bovine incisors were randomly divided into eight groups (n=10) according to: G1(Control): 0.9% Sodium Chloride; G2: 5.25% NaOCl + 17% EDTA; G3: 5.25% NaOCl + 17% EDTA + 10% ascorbic acid; G4: 5,25% NaOCl + 17% EDTA + 10% sodium ascorbate; G5: 5.25% NaOCl; G6: 17% EDTA; G7: 10% ascorbic acid; G8: 10% sodium ascorbate. Teeth were chemomechanically prepared and submitted to histological processing to be analyzed under polarized light microscopy. Absorbance assay was also performed to confirm the loss of collagen. It is possible to conclude that groups treated with 5.25% NaOCl (G2 and G5) presented a significantly different
birefringence pattern compared with the control group (p<0.05).The
birefringence values reduced could be reversed by the application of either 10% ascorbic acid or 10% sodium ascorbate after 5.25% NaOCl and 17% EDTA irrigation. The absorbance assay of G2 and G5 confirmed the loss of collagen (p<0.05). The second study aimed to evaluate the effect of 10% ascorbic acid or 10% sodium ascorbate application after 5.25% NaOCl, 17% EDTA or 0.9% sodium chloride irrigation in the Knoop microhardness and flexural strength on root dentin. Eighty bovine incisors were randomly divided into eight groups (n=10): G1 (Control): 0.9% Sodium Chloride; G2: 5.25% NaOCl + 17% EDTA; G3: 5.25% NaOCl + 17% EDTA + 10% ascorbic acid; G4: 5.25% NaOCl + 17% EDTA + 10% sodium ascorbate; G5: 5.25% NaOCl; G6: 17% EDTA; G7: 10% ascorbic acid; G8: 10% sodium ascorbate. Teeth were chemomechanically prepared and submitted to Knoop microhardness. Standardized plano-parallel dentin bars were prepared and randomly divided into the same eight groups (n=15) cited above. The dentin bars were then loaded to failure in a three-point bend test. Root canal irrigation with 5.25% NaOCl reduced the microhardness of dentin in all distances tested. The microhardness values increased in all distances when sodium ascorbate was used after 5.25% NaOCl and 17% EDTA irrigation. By exposing the dentin bars to 5.25% NaOCl, whether it was associated or not to 17% EDTA, the flexural strength decreased. However, values increased when 10% ascorbic acid or 10% sodium ascorbate were used after 5.25% NaOCl and 17% EDTA irrigation
Advisors/Committee Members: UNIVERSIDADE ESTADUAL DE CAMPINAS (CRUESP), Záia, Alexandre Augusto, 1968- (advisor), Universidade Estadual de Campinas. Faculdade de Odontologia de Piracicaba (institution), Programa de Pós-Graduação em Clínica Odontológica (nameofprogram), Valdrighi, Luiz (committee member), Moraes, Ivaldo Gomes de (committee member), Gavini, Giulio (committee member), Goes, Mario Fernando de (committee member).
Subjects/Keywords: Birrefringência; Dentina; Birefringence; Dentin
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❌
APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Moreira, D. M. (2011). Influência de substâncias químicas auxiliares de uso endodôntico e agentes redutores nas propriedades biomecânicas da dentina radicular: Effects of reducing agents and endodontics auxiliary chemical solutions on biomechanical properties of root dentin. (Thesis). Universidade Estadual de Campinas. Retrieved from http://repositorio.unicamp.br/jspui/handle/REPOSIP/289790
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Chicago Manual of Style (16th Edition):
Moreira, Danna Mota. “Influência de substâncias químicas auxiliares de uso endodôntico e agentes redutores nas propriedades biomecânicas da dentina radicular: Effects of reducing agents and endodontics auxiliary chemical solutions on biomechanical properties of root dentin.” 2011. Thesis, Universidade Estadual de Campinas. Accessed February 27, 2021.
http://repositorio.unicamp.br/jspui/handle/REPOSIP/289790.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
Moreira, Danna Mota. “Influência de substâncias químicas auxiliares de uso endodôntico e agentes redutores nas propriedades biomecânicas da dentina radicular: Effects of reducing agents and endodontics auxiliary chemical solutions on biomechanical properties of root dentin.” 2011. Web. 27 Feb 2021.
Vancouver:
Moreira DM. Influência de substâncias químicas auxiliares de uso endodôntico e agentes redutores nas propriedades biomecânicas da dentina radicular: Effects of reducing agents and endodontics auxiliary chemical solutions on biomechanical properties of root dentin. [Internet] [Thesis]. Universidade Estadual de Campinas; 2011. [cited 2021 Feb 27].
Available from: http://repositorio.unicamp.br/jspui/handle/REPOSIP/289790.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
Moreira DM. Influência de substâncias químicas auxiliares de uso endodôntico e agentes redutores nas propriedades biomecânicas da dentina radicular: Effects of reducing agents and endodontics auxiliary chemical solutions on biomechanical properties of root dentin. [Thesis]. Universidade Estadual de Campinas; 2011. Available from: http://repositorio.unicamp.br/jspui/handle/REPOSIP/289790
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

NSYSU
4.
Liou, Jia-Hua.
Polarization characteristics of 1D plasmonic grating measurement and discussion.
Degree: Master, Electro-Optical Engineering, 2011, NSYSU
URL: http://etd.lib.nsysu.edu.tw/ETD-db/ETD-search/view_etd?URN=etd-0623111-163158
► The birefringence of one-dimension PMMA surface gratings on a gold film substrate is investigated. The grating served as a coupler to facilitate the incoming light…
(more)
▼ The
birefringence of one-dimension PMMA surface gratings on a gold film substrate is investigated. The grating served as a coupler to facilitate the incoming light coupled to surface plasmon wave (SPW) which possesses high propagation wave vector. Since surface plasmon waves(SPWs) have a special dispersion relation, the
birefringence Îneff (Îneff =nx-ny, where grating k-vector is along x axis) of this structure is relatively large and can be changed from positive to negative by changing the operation wavelength.
The obtained the four Stokes parameters at 515nm and 633nm are marked on the Poincare sphere. Îneff is
2Ï/7 and -Ï/8 at 515nm and 633nm respectively. Further, by
changing the form factor of PMMA gratings, we found that the maximum Îneff occurred when PMMA stripe width : air gap=1:1.
Advisors/Committee Members: Ann-Kuo Chu (chair), Yu-Ju Hung (committee member), Chin-Ping Yu (chair), Tsung-Hsien Lin (chair).
Subjects/Keywords: Poincare sphere; birefringence; grating; surface plasmon wave
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❌
APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Liou, J. (2011). Polarization characteristics of 1D plasmonic grating measurement and discussion. (Thesis). NSYSU. Retrieved from http://etd.lib.nsysu.edu.tw/ETD-db/ETD-search/view_etd?URN=etd-0623111-163158
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Chicago Manual of Style (16th Edition):
Liou, Jia-Hua. “Polarization characteristics of 1D plasmonic grating measurement and discussion.” 2011. Thesis, NSYSU. Accessed February 27, 2021.
http://etd.lib.nsysu.edu.tw/ETD-db/ETD-search/view_etd?URN=etd-0623111-163158.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
Liou, Jia-Hua. “Polarization characteristics of 1D plasmonic grating measurement and discussion.” 2011. Web. 27 Feb 2021.
Vancouver:
Liou J. Polarization characteristics of 1D plasmonic grating measurement and discussion. [Internet] [Thesis]. NSYSU; 2011. [cited 2021 Feb 27].
Available from: http://etd.lib.nsysu.edu.tw/ETD-db/ETD-search/view_etd?URN=etd-0623111-163158.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
Liou J. Polarization characteristics of 1D plasmonic grating measurement and discussion. [Thesis]. NSYSU; 2011. Available from: http://etd.lib.nsysu.edu.tw/ETD-db/ETD-search/view_etd?URN=etd-0623111-163158
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

University of Rochester
5.
Beckley, Amber Michelle (1982 - ).
Polarimetry and beam apodization using stress-engineered
optical elements.
Degree: PhD, 2012, University of Rochester
URL: http://hdl.handle.net/1802/24870
► Stress-engineered optical (SEO) elements are optical ats or lenses with symmetrically spaced, peripherally applied forces; they have been shown to exhibit complex and potentially useful…
(more)
▼ Stress-engineered optical (SEO) elements are
optical
ats or lenses with symmetrically
spaced, peripherally
applied forces; they have been shown to exhibit complex
and
potentially useful space-variant polarization properties. Possible
applications
include polarimetry instrumentation and beam
apodization for creation of exotic
polarization states. In this
thesis, the mechanical and optical properties of SEO
elements are
interrogated and several applications are proposed.
Two models for
the mechanical distributions in symmetrically stressed elements
are presented in order to better describe the overall
stress-birefringence
distribution. The mathematical calculations
and measurements of the retardance
distribution and Mueller
matrices for the full aperture and the central region,
as well as
the phase vortex creation properties of these elements are
presented.
Building on these properties, two methods for use of
symmetric SEO elements for
single-measurement uniform polarimetry
and angular spectrum pupil polarimetry
applications are proposed,
along with simulations and some experimental trials.
The
properties of these elements could also be of interest for beam
apodization
applications. Use of these elements for the creation
of several versions of the exotic
states called full Poincare
beams and the resulting propagation eects are explored,
including
a mathematical formalism and several experimental implementations.
Additional apodization phenomena are presented, including wavefront
aberration
imprinting and creation of propagation invariant
Bessel-like beams.
Subjects/Keywords: Birefringence; Optomechanics; Phase vortices; Polarization; Stress.
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❌
APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Beckley, A. M. (. -. ). (2012). Polarimetry and beam apodization using stress-engineered
optical elements. (Doctoral Dissertation). University of Rochester. Retrieved from http://hdl.handle.net/1802/24870
Chicago Manual of Style (16th Edition):
Beckley, Amber Michelle (1982 - ). “Polarimetry and beam apodization using stress-engineered
optical elements.” 2012. Doctoral Dissertation, University of Rochester. Accessed February 27, 2021.
http://hdl.handle.net/1802/24870.
MLA Handbook (7th Edition):
Beckley, Amber Michelle (1982 - ). “Polarimetry and beam apodization using stress-engineered
optical elements.” 2012. Web. 27 Feb 2021.
Vancouver:
Beckley AM(-). Polarimetry and beam apodization using stress-engineered
optical elements. [Internet] [Doctoral dissertation]. University of Rochester; 2012. [cited 2021 Feb 27].
Available from: http://hdl.handle.net/1802/24870.
Council of Science Editors:
Beckley AM(-). Polarimetry and beam apodization using stress-engineered
optical elements. [Doctoral Dissertation]. University of Rochester; 2012. Available from: http://hdl.handle.net/1802/24870

University of Rochester
6.
Vella, Anthony John; Alonso, Miguel A.
Description and applications of space-variant
polarization states and elements.
Degree: PhD, 2019, University of Rochester
URL: http://hdl.handle.net/1802/34640
► Space-variant polarization states and elements have received significant interest in recent years for their interesting physical properties and widespread applications. This thesis is primarily focused…
(more)
▼ Space-variant polarization states and elements have
received significant interest in
recent years for their
interesting physical properties and widespread applications.
This
thesis is primarily focused on the optimization of
spatially-varying polarization
distributions and birefringent
media for three applications: semiconductor metrology,
star test
polarimetry, and optical bottle field generation. These analyses
are
supported by additional chapters discussing a geometrical
representation for spatially-varying
birefringence on the Poincaré
sphere and an overview of maximum likelihood
estimation in the
context of an optical measurement.
The first application is a
focused beam scatterometry experiment for simultaneous
retrieval
of multiple parameters of a subwavelength structure. As a variation
of
traditional Fourier scatterometry, a tailored spatially-varying
polarization distribution
is used to achieve heightened
sensitivity to variations in each parameter. This
measurement
technique has practical uses in the semiconductor industry, where
there
is a high demand for fast and accurate measurements of
silicon transistor components.
As an example, initial
two-parameter measurements of a silicon lamellar grating
are
presented, leading to parameter estimates with sub-nanometer
precision, on par
with current industry needs. Additionally,
simulations are performed to predict the
improvement in accuracy
in future experiments with refined polarization control.
The
second application is star test polarimetry, in which an element
with spatiallyvarying
birefringence is used to encode polarization
information into the point-spread
function (PSF) of an imaging
system. A variational calculation is performed to
optimize the
birefringence distribution to produce the smallest possible PSF,
thus
maximizing the resolution for imaging polarimetry
measurements. The optimal
solution is found to be nearly identical
to the birefringence distribution of a stressengineered
optic
(SEO) with three stress points, which has been used in previous
star
test polarimetry experiments.
The third and final
application is a method for generating an optical bottle field
containing a three-dimensional null in intensity at the focal
point, which is useful for
optical trapping and microscopy. The
spatial variation of a birefringent mask, placed
in the pupil
plane of a high-NA focusing system, is optimized to produce a
bottle
field with the sharpest possible minimum in intensity. The
optimal solution is shown
to be closely approximated by an
SEO.
Subjects/Keywords: Birefringence; Maximum likelihood estimation; Metrology; Polarization
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❌
APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Vella, Anthony John; Alonso, M. A. (2019). Description and applications of space-variant
polarization states and elements. (Doctoral Dissertation). University of Rochester. Retrieved from http://hdl.handle.net/1802/34640
Chicago Manual of Style (16th Edition):
Vella, Anthony John; Alonso, Miguel A. “Description and applications of space-variant
polarization states and elements.” 2019. Doctoral Dissertation, University of Rochester. Accessed February 27, 2021.
http://hdl.handle.net/1802/34640.
MLA Handbook (7th Edition):
Vella, Anthony John; Alonso, Miguel A. “Description and applications of space-variant
polarization states and elements.” 2019. Web. 27 Feb 2021.
Vancouver:
Vella, Anthony John; Alonso MA. Description and applications of space-variant
polarization states and elements. [Internet] [Doctoral dissertation]. University of Rochester; 2019. [cited 2021 Feb 27].
Available from: http://hdl.handle.net/1802/34640.
Council of Science Editors:
Vella, Anthony John; Alonso MA. Description and applications of space-variant
polarization states and elements. [Doctoral Dissertation]. University of Rochester; 2019. Available from: http://hdl.handle.net/1802/34640
7.
Huynh, Dung.
Development of optical indices of articular cartilage damage and microstructure.
Degree: 2020, The Catholic University of America
URL: http://hdl.handle.net/1961/cuislandora:214716
► Articular cartilage is a microstructurally and biochemically complex tissue with distinct zonal architecture. The primary interactions of articular cartilage with polarized light are depolarization, diattenuation,…
(more)
▼ Articular cartilage is a microstructurally and biochemically complex tissue with distinct zonal architecture. The primary interactions of articular cartilage with polarized light are depolarization, diattenuation, and retardance. Damage to this tissue leads to osteoarthritis (OA), the most common chronic disease affecting 30 million adults in the United States. There is currently no cure for OA. Thus, methods to detect early or pre-OA, focusing on detection of cartilage surface damage and microstructural alterations, are of great interest to clinical orthopedics. Collagen fibers in articular cartilage possess strong birefringence. Birefringence signals and other polarization sensitive optical parameters can probe both surface and subsurface feature of pre-OA cartilage. The goal of this dissertation was to develop polarized reflectance microscopy as an imaging technique to detect OA-related alterations to articular cartilage. Three separate but related studies were conducted to investigate the sensitivity of polarized reflectance parameters. The first study found that polarized reflectance signal is associated with microscale damage to the articular surface and sub-surface collagen structure, similar to alterations that occur in early OA. The second study analyzed the origins of polarized reflectance image textural patterns and related them to underlying collagen network microstructure in the superficial zone. The third study separated polarized reflectance signal into major linear retardance and depolarization components by polar decomposition of experimentally-acquired Mueller matrix images, using a custom-built reflectance polarimeter. Together, these findings support the relevance of polarized reflectance signals from articular cartilage to orthopedic research and suggest clinical utility. Polarized reflectance imaging provides a noninvasive, label-free and fast way to assess superficial articular cartilage microstructure and may contribute to the development of novel optical biomarkers for prediction of early OA. Quantitative optical indices and image textural parameters derived from polarized reflectance imaging hold promise for clinical translation in arthroscopic modalities, or ex vivo tissue analysis.
Biomedical engineering
Bioengineering
articular cartilage, birefringence, microscopy, polarization, reflectance
Biomedical Engineering
Degree Awarded: D.Engr. Biomedical Engineering. The Catholic University of America
Advisors/Committee Members: The Catholic University of America (Degree granting institution), Raub, Christopher (Thesis advisor), Nehmetallah, Georges (Committee member), Wang, Zhaoyang (Committee member), Chang, Lin-ching (Committee member), Namazi, Nader (Committee member).
Subjects/Keywords: articular cartilage; birefringence; microscopy; polarization; reflectance
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❌
APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Huynh, D. (2020). Development of optical indices of articular cartilage damage and microstructure. (Thesis). The Catholic University of America. Retrieved from http://hdl.handle.net/1961/cuislandora:214716
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Chicago Manual of Style (16th Edition):
Huynh, Dung. “Development of optical indices of articular cartilage damage and microstructure.” 2020. Thesis, The Catholic University of America. Accessed February 27, 2021.
http://hdl.handle.net/1961/cuislandora:214716.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
Huynh, Dung. “Development of optical indices of articular cartilage damage and microstructure.” 2020. Web. 27 Feb 2021.
Vancouver:
Huynh D. Development of optical indices of articular cartilage damage and microstructure. [Internet] [Thesis]. The Catholic University of America; 2020. [cited 2021 Feb 27].
Available from: http://hdl.handle.net/1961/cuislandora:214716.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
Huynh D. Development of optical indices of articular cartilage damage and microstructure. [Thesis]. The Catholic University of America; 2020. Available from: http://hdl.handle.net/1961/cuislandora:214716
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

University of Exeter
8.
Pinto, Hugo Manuel.
Defects and dopants in carbon related materials.
Degree: PhD, 2012, University of Exeter
URL: https://ore.exeter.ac.uk/repository/handle/10036/3601
;
https://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.566210
► This thesis presents theoretical studies of the optical and electronic properties of defects in diamond and of the mechanisms of doping graphene. The birefringence of…
(more)
▼ This thesis presents theoretical studies of the optical and electronic properties of defects in diamond and of the mechanisms of doping graphene. The birefringence of the four petalled defect commonly observed in CVD diamond is explained by four linear arrays of dislocations along ⟨110⟩ directions with ⟨110⟩ Burgers vectors. Such an arrangement of dislocations reproduces the extension and the features of the birefringence patterns observed experimentally. Density functional theory via the AIMPRO code was used to study the electronic and optical properties of different nitrogen-related point defects in diamond. It was found that the zero-phonon luminescence line of the NV− defects can split in the presence of a surface or other NV− defects. Since VNH and VN2 are expected to have similar optical properties, the optical transi- tions for VN2 were used to correct the transitions for VNH calculated by local density approximation. The absorption band at 2.38 eV (520 nm) observed in CVD diamond is then attributed to an internal transition of VNH. The weak zero-phonon line and broad vibronic sidebands for VN− and VN−2 and its absence for VNH− is explained by the large structural change when the defect is excited. Finally, different mechanisms for doping graphene were considered. The calculations predict the electropositive metals, such as Ti and Cr, act as donors, while molecules with strong electron affinity, such as F4-TCNQ, act as acceptors in graphene. An unexpected mechanism of doping graphene was shown by Au which dopes bilayer graphene but not single layer. In the presence of water, electrochemical reactions on the graphene can also lead to p or n-type doping.
Subjects/Keywords: 621.38152; diamond; graphene; doping; point defects; birefringence
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❌
APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Pinto, H. M. (2012). Defects and dopants in carbon related materials. (Doctoral Dissertation). University of Exeter. Retrieved from https://ore.exeter.ac.uk/repository/handle/10036/3601 ; https://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.566210
Chicago Manual of Style (16th Edition):
Pinto, Hugo Manuel. “Defects and dopants in carbon related materials.” 2012. Doctoral Dissertation, University of Exeter. Accessed February 27, 2021.
https://ore.exeter.ac.uk/repository/handle/10036/3601 ; https://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.566210.
MLA Handbook (7th Edition):
Pinto, Hugo Manuel. “Defects and dopants in carbon related materials.” 2012. Web. 27 Feb 2021.
Vancouver:
Pinto HM. Defects and dopants in carbon related materials. [Internet] [Doctoral dissertation]. University of Exeter; 2012. [cited 2021 Feb 27].
Available from: https://ore.exeter.ac.uk/repository/handle/10036/3601 ; https://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.566210.
Council of Science Editors:
Pinto HM. Defects and dopants in carbon related materials. [Doctoral Dissertation]. University of Exeter; 2012. Available from: https://ore.exeter.ac.uk/repository/handle/10036/3601 ; https://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.566210

Texas Tech University
9.
Mandal, Tapas.
Terahertz Spectroscopy of vanadium dioxide films grown on a-plane sapphire substrate.
Degree: 2013, Texas Tech University
URL: http://hdl.handle.net/2346/48910
► Vanadium dioxide (VO2) has been attracting considerable attention due its unique reversible phase transformation property which changes from an insulator (semiconductor) with monoclinic crystal symmetry…
(more)
▼ Vanadium dioxide (VO2) has been attracting considerable attention due its unique reversible phase transformation property which changes from an insulator (semiconductor) with monoclinic crystal symmetry to a metallic phase with a tetragonal rutile structure. The phase transition is accompanied by 3-5 orders of magnitude change in electrical conductivity. The phase transition can be driven by an external perturbation such as temperature, electric field or laser excitation. The metal-insulator phase transition is of particular interest to realize reconfigurable optical devices such as switches, filters, polarizers and spatial light modulators.
High quality VO2 films have been obtained using different substrates and deposition techniques. Among the various substrates used, sapphire is one of the most common ones due to important attributes such as crystalline quality, mechanical stability, and optical transparency in a wide range of frequencies. The substrate orientation plays a fundamental role on the properties of the VO2 films which include: transition temperature, resistivity-change during the metal-insulator phase transition, thermal hysteresis loop width, and crystalline quality. Detailed investigations on the influence of the substrate type and orientation are critical to obtain high-quality VO2 films for future device applications. VO2 has been recently used for switching and modulation applications and for realization of reconfigurable metamaterial filters and polarizers at terahertz (THz) frequencies. In the insulator phase VO2 grown on sapphire substrate is almost transparent to THz radiation. In contrast, above the phase transition, VO2 behaves as a metal and therefore is almost opaque to THz radiation. This makes VO2 an ideal material for applications where high amplitude modulation is a critical requirement.
In this work we performed detailed investigations on the THz transmission through VO2 films grown on a-plane sapphire substrates. The temperature-driven method was used to trigger the phase transition of the VO2 films. Measurements were carried out at different temperatures using THz time-domain spectroscopy technique. Complex refractive index and optical conductivity and
birefringence were determined for the VO2 films at temperatures below, during and above the phase transition. Our results indicate that VO2 films grown on a-plane sapphire substrates can be used as an anti-reflecting coating material at THz frequencies.
Advisors/Committee Members: Bernussi, Ayrton A. (Committee Chair), Fan, Zhaoyang (committee member).
Subjects/Keywords: Vanadium dioxide-a plane; Terahertz spectroscopy,birefringence
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❌
APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Mandal, T. (2013). Terahertz Spectroscopy of vanadium dioxide films grown on a-plane sapphire substrate. (Thesis). Texas Tech University. Retrieved from http://hdl.handle.net/2346/48910
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Chicago Manual of Style (16th Edition):
Mandal, Tapas. “Terahertz Spectroscopy of vanadium dioxide films grown on a-plane sapphire substrate.” 2013. Thesis, Texas Tech University. Accessed February 27, 2021.
http://hdl.handle.net/2346/48910.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
Mandal, Tapas. “Terahertz Spectroscopy of vanadium dioxide films grown on a-plane sapphire substrate.” 2013. Web. 27 Feb 2021.
Vancouver:
Mandal T. Terahertz Spectroscopy of vanadium dioxide films grown on a-plane sapphire substrate. [Internet] [Thesis]. Texas Tech University; 2013. [cited 2021 Feb 27].
Available from: http://hdl.handle.net/2346/48910.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
Mandal T. Terahertz Spectroscopy of vanadium dioxide films grown on a-plane sapphire substrate. [Thesis]. Texas Tech University; 2013. Available from: http://hdl.handle.net/2346/48910
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

University of Arizona
10.
Daugherty, Brian.
Advances in Polarization Engineering
.
Degree: 2019, University of Arizona
URL: http://hdl.handle.net/10150/636917
► Polarization plays an important role in many optical systems and device. This includes devices designed to advantageously use polarization, like liquid crystal displays, and optical…
(more)
▼ Polarization plays an important role in many optical systems and device. This includes devices designed to advantageously use polarization, like liquid crystal displays, and optical systems that measure polarization to obtain information not otherwise available, like instruments found in many modern telescopes. Polarization also needs to be considered in some systems where it is not a primary aspect of the design, like image formation in very high numerical aperture objective lenses. This manuscript discusses three optical engineering projects where accurate polarization analysis or testing was required.
Chapter one discusses a case where the need for polarization engineering arises from extreme optical requirements. Exoplanet direct imaging requires extremely high contrast, so any possible phase errors need to be considered. This includes the effects of form
birefringence, which had previously not been measured over a large diameter mirror. Chapter one presents the first measurements of form
birefringence over a large diameter telescope mirror. Measurements of the 3.75-meter, spherical mirror, coated by vacuum deposition of aluminum, indicate low levels of retardance and diattenuation that vary over the face of the mirror. The retardance and diattenuation had maximum values of about 2x10-3 radians and 0.025% respectively. Initial modeling by Davis J., et al. shows that this level of form
birefringence could be impactful in direct imaging systems. The chapter discusses the design of the metrology system used to perform the measurements.
The polarization engineering in chapter 2 relates to a remote sensing instrument that detects polarization to provide information in addition to its spectral reflectance measuring capabilities. Chapter two covers the design and testing of the second-generation polarization state generator used for the calibration and testing of Jet Propulsion Laboratory’s (JPL) air-based, multispectral polarimetric imager (AirMSPI). The chapter focuses on the requirements of a polarization standard. The first-generation instrument is analyzed carefully and the lessons learned are applied to improving the second. The updated version has been successfully used for AirMSPI calibration prior to multiple airborne science campaigns.
The third chapter discusses the analysis and modification of a nominally non-polarizing optical sub-system that has polarization design requirements. This highlights important polarization issues that occur is systems containing a large number of surfaces. The issues with the systems polarization performance are identified. A method to improve the polarization performance that can be implemented without any additional calculations is demonstrated. The system is then modified to improve the polarization performance while maintaining other important optical properties. Finally, the manufacturability of the modified design is considered.
Advisors/Committee Members: Chipman, Russell A (advisor), Pau, Stanley (committeemember), Kim, Daewook (committeemember), Breckinridge, James B. (committeemember).
Subjects/Keywords: form birefringence;
MSPI;
Polarization;
polarization state generator
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❌
APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Daugherty, B. (2019). Advances in Polarization Engineering
. (Doctoral Dissertation). University of Arizona. Retrieved from http://hdl.handle.net/10150/636917
Chicago Manual of Style (16th Edition):
Daugherty, Brian. “Advances in Polarization Engineering
.” 2019. Doctoral Dissertation, University of Arizona. Accessed February 27, 2021.
http://hdl.handle.net/10150/636917.
MLA Handbook (7th Edition):
Daugherty, Brian. “Advances in Polarization Engineering
.” 2019. Web. 27 Feb 2021.
Vancouver:
Daugherty B. Advances in Polarization Engineering
. [Internet] [Doctoral dissertation]. University of Arizona; 2019. [cited 2021 Feb 27].
Available from: http://hdl.handle.net/10150/636917.
Council of Science Editors:
Daugherty B. Advances in Polarization Engineering
. [Doctoral Dissertation]. University of Arizona; 2019. Available from: http://hdl.handle.net/10150/636917

University of Maryland
11.
Elle, Jennifer.
STUDY OF THE FEMTOSECOND DYNAMICS AND SPECTROSCOPY OF LASER IONIZED PLASMAS.
Degree: Physics, 2015, University of Maryland
URL: http://hdl.handle.net/1903/16462
► Ultra-short laser pulses are used to ionize gas in different configurations and study the plasma and ionization dynamics. The variation in non-linear index of refraction…
(more)
▼ Ultra-short laser pulses are used to ionize gas in different configurations and study the plasma and ionization dynamics. The variation in non-linear index of refraction as a function of time is used to diagnose laser-plasma interactions. First, a proposed novel method to stimulate lasing in the atmosphere is studied. A few mJ pulse is used to ionize nitrogen gas in a long column without dissociating the molecular nitrogen. A 140ps laser is used to heat the resulting electron population in an attempt to generate a population inversion between the C3u and B3g states of molecular nitrogen. No evidence of lasing from this transition is observed. Next, a few mJ pulse is used to ionize xenon gas, creating Xe+ plasma. Ionization in Xe+ is observed far below the threshold predicted by multiphoton ionization theory due to resonant multiphoton ionization of collisionally excited states. To my knowledge, this is the first observation of resonant ionization involving multiple resonances. Finally, construction of an experiment to detect predicted
birefringence in a relativistic laser-plasma interaction is described, with preliminary testing of diagnostics included.
Advisors/Committee Members: Milchberg, Howard M (advisor).
Subjects/Keywords: Physics; Birefringence; Interferometry; Ionization; Laser; Plasma
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❌
APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Elle, J. (2015). STUDY OF THE FEMTOSECOND DYNAMICS AND SPECTROSCOPY OF LASER IONIZED PLASMAS. (Thesis). University of Maryland. Retrieved from http://hdl.handle.net/1903/16462
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Chicago Manual of Style (16th Edition):
Elle, Jennifer. “STUDY OF THE FEMTOSECOND DYNAMICS AND SPECTROSCOPY OF LASER IONIZED PLASMAS.” 2015. Thesis, University of Maryland. Accessed February 27, 2021.
http://hdl.handle.net/1903/16462.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
Elle, Jennifer. “STUDY OF THE FEMTOSECOND DYNAMICS AND SPECTROSCOPY OF LASER IONIZED PLASMAS.” 2015. Web. 27 Feb 2021.
Vancouver:
Elle J. STUDY OF THE FEMTOSECOND DYNAMICS AND SPECTROSCOPY OF LASER IONIZED PLASMAS. [Internet] [Thesis]. University of Maryland; 2015. [cited 2021 Feb 27].
Available from: http://hdl.handle.net/1903/16462.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
Elle J. STUDY OF THE FEMTOSECOND DYNAMICS AND SPECTROSCOPY OF LASER IONIZED PLASMAS. [Thesis]. University of Maryland; 2015. Available from: http://hdl.handle.net/1903/16462
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

University of Akron
12.
Mu, Shenglong.
A Real-time Study on Mechano-optical Properties of Chitosan
during Film Formation and Processing.
Degree: MSin Polymer Engineering, Polymer Engineering, 2016, University of Akron
URL: http://rave.ohiolink.edu/etdc/view?acc_num=akron1462885413
► Chitosan has been intensively studied since 1979 for its vast applications in food packaging due to the promising antimicrobial properties. A fundamental understanding on the…
(more)
▼ Chitosan has been intensively studied since 1979 for
its vast applications in food packaging due to the promising
antimicrobial properties. A fundamental understanding on the
processing characteristics is essential in order to achieve desired
properties with regarding to the final products. However, the
conventional off line techniques where the samples were
characterized sporadically are difficult if not impossible to
capture the transient evolution of the structures and properties
development that take place in the film formation and processing of
chitosan. In order to address this issue, a real time measurement
system which is able to track the development of weight, thickness,
surface temperature, both in-plane
birefringence and out-of-plane
birefringence during the drying of solution casting was developed
and utilized in this study to systematically investigate the
optical anisotropy development of chitosan film formation.
Meanwhile, another real time measurement system where the
birefringence, true stress and true strain can be continuously
tracked for a film undergoing all kinds of processing procedures,
such as heating, cooling, uniaxial stretching, holding, retracting
and cycling was also adopted to study and reveal the
mechano-optical properties development in the actual film
processing. It has been seen that in the film formation of
chitosan/acetic acid solution casting, both in plane and out of
plane
birefringence remain constant at zero initially indicating
that the molecular chains stay random and isotropic in the
solution. As the drying process proceeds, beyond a critical time
point, the out-of-plane
birefringence starts to increase and then
levels off while the in-plane
birefringence stays zero which
illustrates that the molecular chains still remain isotropic
in-plane whereas the chain axes rotate to lie parallel in the film
plane preferentially. Increasing the concentration of chitosan
leads to the decrease in ultimate out-of-plane
birefringence due to
the lower chain orientation level in the plane. Similarly, higher
temperature results lower out-of-plane
birefringence value due to
higher relaxation.Moreover, the resulting chitosan films from
chitosan/acetic acid solution casting dried at ambient environment
always contain ~10wt. % solvent (calculated from the weight data
above as well as thermogravimetric analysis) which plasticizes
chitosan and validates its stretchability at relatively low
temperature. Hence, the effects of both solvent content and
temperature were studied in the stretching process. Generally, a
three-regime of non-linear stress and strain-optical behavior can
be seen: stress increase dramatically before yielding point, stress
increase with a relatively mild rate after yielding point and a
steep rise shows up in the strain hardening point. The increase of
solvent content tends to change the deformation behavior from
plastic-like to rubber-like behavior, and promotes the relaxation
of polymer segments to reduce the final
birefringence. Increasing
stretching temperature and…
Advisors/Committee Members: Cakmak, Miko (Advisor), Mark D., Soucek (Committee Chair).
Subjects/Keywords: Polymers; Chitosan, Birefringence, Unixial stretching, Drying
behavior
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❌
APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Mu, S. (2016). A Real-time Study on Mechano-optical Properties of Chitosan
during Film Formation and Processing. (Masters Thesis). University of Akron. Retrieved from http://rave.ohiolink.edu/etdc/view?acc_num=akron1462885413
Chicago Manual of Style (16th Edition):
Mu, Shenglong. “A Real-time Study on Mechano-optical Properties of Chitosan
during Film Formation and Processing.” 2016. Masters Thesis, University of Akron. Accessed February 27, 2021.
http://rave.ohiolink.edu/etdc/view?acc_num=akron1462885413.
MLA Handbook (7th Edition):
Mu, Shenglong. “A Real-time Study on Mechano-optical Properties of Chitosan
during Film Formation and Processing.” 2016. Web. 27 Feb 2021.
Vancouver:
Mu S. A Real-time Study on Mechano-optical Properties of Chitosan
during Film Formation and Processing. [Internet] [Masters thesis]. University of Akron; 2016. [cited 2021 Feb 27].
Available from: http://rave.ohiolink.edu/etdc/view?acc_num=akron1462885413.
Council of Science Editors:
Mu S. A Real-time Study on Mechano-optical Properties of Chitosan
during Film Formation and Processing. [Masters Thesis]. University of Akron; 2016. Available from: http://rave.ohiolink.edu/etdc/view?acc_num=akron1462885413
13.
Stoffel, Diane.
Caractérisation du matériau Nd : Lu : CaF2 pour l'amplification laser à 1053 nm : Material Nd : Lu : CaF2 characterization for laser amplification at 1053 nm.
Degree: Docteur es, Lasers, Matière et Nanosciences, 2019, Bordeaux
URL: http://www.theses.fr/2019BORD0039
► Le laser Mégajoule, dédié à l’interaction laser-matière pour la physique des hautes énergies est composé de modules pré-amplificateurs (MPA) devant respecter une qualité de faisceau…
(more)
▼ Le laser Mégajoule, dédié à l’interaction laser-matière pour la physique des hautes énergies est composé de modules pré-amplificateurs (MPA) devant respecter une qualité de faisceau exigeante. Les MPA actuels utilisent des matériaux verre phosphate dopé au Néodyme pour un fonctionnement à 1053 nm. Leur cadence de tir est cependant limitée à 1 tir / 5 min à cause de leur faible conductivité thermique. Il serait intéressant d’augmenter cette cadence pour optimiser le temps alignement des optiques ou réaliser des diagnostics sur l’installation laser. Pour augmenter la cadence de tir des MPA, nous proposons de changer le matériau actuel par du Nd :Lu :CaF2 de conductivité thermique dix fois plus élevée en vue d’atteindre une cadence de répétition de 10 Hz. Dans ce travail de thèse, nous présentons une étude des effets thermomécaniques induits par un pompage diode inhomogène et transverse, de fluence 13 J/cm2. Nous présentons les mesures de biréfringence résolues spatialement avec un montage en polariseur-analyseur croisés. La distribution des contraintes thermomécaniques associées est reconstruite par un modèle de simulation avec le logiciel COMSOL®. Enfin, une étude de l’influence de l’orientation cristalline du Nd :Lu :CaF2 est développée afin d’expliquer la disparité de biréfringence induite mesurée entre les échantillon de Nd :Lu :CaF2.
Laser facility such as the Megajoule Laser dedicated to laser-matter interaction including inertial fusion need pre-amplifier modules (PAM) which must respect a high beam quality. The current PAM use Phosphate glass doped with Neodymium material to work at 1053 nm with a repetition rate of 1 shot / 5 min limited by a low thermal diffusion. However, it would be interesting to increase the shot rate for alignment or diagnostic purposes. Therefore, we propose to change this amplification material by crystal Nd :Lu :CaF2 with a thermal diffusion ten times higher in view of achieving a repetition rate of 10 Hz. In this PhD work, we report a characterization of the thermal induced effects under a diode inhomogeneous and transverse pump with an energy density of 13 J/cm2. We begin by studying the spatially resolved induced birefringence with a cross polarizer-analyzer setup. We reconstruct the stress pattern of our samples by simulating the global setup with COMSOL® software which includes the thermal and mechanic Multiphysics interaction. This model allows us first to compare with experimental results and then to entirely simulate the mechanical behavior of this new material. A detailed study of the influence of the crystal orientation on the induced birefringence is presented to explain the disparity observed on the different samples Nd :Lu :CaF2 measurements
Advisors/Committee Members: Balcou, Philippe (thesis director), Montant, Sébastien (thesis director).
Subjects/Keywords: Laser solide; Birefringence; Nd:Lu:CaF2; Effets thermiques; Solid state laser; Birefringence; Nd:Lu:CaF2; Thermal effects
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❌
APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Stoffel, D. (2019). Caractérisation du matériau Nd : Lu : CaF2 pour l'amplification laser à 1053 nm : Material Nd : Lu : CaF2 characterization for laser amplification at 1053 nm. (Doctoral Dissertation). Bordeaux. Retrieved from http://www.theses.fr/2019BORD0039
Chicago Manual of Style (16th Edition):
Stoffel, Diane. “Caractérisation du matériau Nd : Lu : CaF2 pour l'amplification laser à 1053 nm : Material Nd : Lu : CaF2 characterization for laser amplification at 1053 nm.” 2019. Doctoral Dissertation, Bordeaux. Accessed February 27, 2021.
http://www.theses.fr/2019BORD0039.
MLA Handbook (7th Edition):
Stoffel, Diane. “Caractérisation du matériau Nd : Lu : CaF2 pour l'amplification laser à 1053 nm : Material Nd : Lu : CaF2 characterization for laser amplification at 1053 nm.” 2019. Web. 27 Feb 2021.
Vancouver:
Stoffel D. Caractérisation du matériau Nd : Lu : CaF2 pour l'amplification laser à 1053 nm : Material Nd : Lu : CaF2 characterization for laser amplification at 1053 nm. [Internet] [Doctoral dissertation]. Bordeaux; 2019. [cited 2021 Feb 27].
Available from: http://www.theses.fr/2019BORD0039.
Council of Science Editors:
Stoffel D. Caractérisation du matériau Nd : Lu : CaF2 pour l'amplification laser à 1053 nm : Material Nd : Lu : CaF2 characterization for laser amplification at 1053 nm. [Doctoral Dissertation]. Bordeaux; 2019. Available from: http://www.theses.fr/2019BORD0039
14.
島田, 光星.
高次構造による配向高分子フィルムの複屈折制御.
Degree: 博士(マテリアルサイエンス), 2017, Japan Advanced Institute of Science and Technology / 北陸先端科学技術大学院大学
URL: http://hdl.handle.net/10119/14257
Supervisor:山口 政之
マテリアルサイエンス研究科
博士
Subjects/Keywords: Optical film; Orientation birefringence; Form birefringence; Porous structure
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❌
APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
島田, . (2017). 高次構造による配向高分子フィルムの複屈折制御. (Thesis). Japan Advanced Institute of Science and Technology / 北陸先端科学技術大学院大学. Retrieved from http://hdl.handle.net/10119/14257
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Chicago Manual of Style (16th Edition):
島田, 光星. “高次構造による配向高分子フィルムの複屈折制御.” 2017. Thesis, Japan Advanced Institute of Science and Technology / 北陸先端科学技術大学院大学. Accessed February 27, 2021.
http://hdl.handle.net/10119/14257.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
島田, 光星. “高次構造による配向高分子フィルムの複屈折制御.” 2017. Web. 27 Feb 2021.
Vancouver:
島田 . 高次構造による配向高分子フィルムの複屈折制御. [Internet] [Thesis]. Japan Advanced Institute of Science and Technology / 北陸先端科学技術大学院大学; 2017. [cited 2021 Feb 27].
Available from: http://hdl.handle.net/10119/14257.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
島田 . 高次構造による配向高分子フィルムの複屈折制御. [Thesis]. Japan Advanced Institute of Science and Technology / 北陸先端科学技術大学院大学; 2017. Available from: http://hdl.handle.net/10119/14257
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

NSYSU
15.
Li , Tsung-Hsun.
Analysis on electro-optical modulation of liquid crystal on a metallic grating structure.
Degree: Master, Electro-Optical Engineering, 2015, NSYSU
URL: http://etd.lib.nsysu.edu.tw/ETD-db/ETD-search/view_etd?URN=etd-1014115-210850
► Surface plasmon resonance (SPR) is sensitive to surface structure, metal thickness or refraction index of medium layer. Liquid crystal is anisotropic, and optically, the refraction…
(more)
▼ Surface plasmon resonance (SPR) is sensitive to surface structure, metal thickness or refraction index of medium layer.
Liquid crystal is anisotropic, and optically, the refraction index of light is related to its direction and polarization.
In this research, the birefringent nematic liquid crystal (NLC) with uniaxial crystal structure, E7, was injected to a liquid crystal cell with metallic gratings, and placed on a prism with Kretschmann structure. From the characteristics of electro-optical modulation of liquid crystal, E7 was used to serve as the switch which can couple surface plasma wave. Pumping light source was controlled to be coupled or un-coupled by changing the refraction index of liquid crystal, and SPR mode effect modulated by liquid metal would be reached.
Advisors/Committee Members: Tsung-Hsien Lin (chair), Yuan-Yao Lin (chair), Jui-Hung Hsu (chair), Yu-Ju Hung (committee member).
Subjects/Keywords: Kretschmann structure; Surface plasmon resonance; Anisotropic; Birefringence; Liquid crystals
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APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
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to Zotero / EndNote / Reference
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APA (6th Edition):
Li , T. (2015). Analysis on electro-optical modulation of liquid crystal on a metallic grating structure. (Thesis). NSYSU. Retrieved from http://etd.lib.nsysu.edu.tw/ETD-db/ETD-search/view_etd?URN=etd-1014115-210850
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Chicago Manual of Style (16th Edition):
Li , Tsung-Hsun. “Analysis on electro-optical modulation of liquid crystal on a metallic grating structure.” 2015. Thesis, NSYSU. Accessed February 27, 2021.
http://etd.lib.nsysu.edu.tw/ETD-db/ETD-search/view_etd?URN=etd-1014115-210850.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
Li , Tsung-Hsun. “Analysis on electro-optical modulation of liquid crystal on a metallic grating structure.” 2015. Web. 27 Feb 2021.
Vancouver:
Li T. Analysis on electro-optical modulation of liquid crystal on a metallic grating structure. [Internet] [Thesis]. NSYSU; 2015. [cited 2021 Feb 27].
Available from: http://etd.lib.nsysu.edu.tw/ETD-db/ETD-search/view_etd?URN=etd-1014115-210850.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
Li T. Analysis on electro-optical modulation of liquid crystal on a metallic grating structure. [Thesis]. NSYSU; 2015. Available from: http://etd.lib.nsysu.edu.tw/ETD-db/ETD-search/view_etd?URN=etd-1014115-210850
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
16.
岩崎, 拓也.
セルロース誘導体系複合材料における配向複屈折制御.
Degree: Japan Advanced Institute of Science and Technology / 北陸先端科学技術大学院大学
URL: http://hdl.handle.net/10119/4239
Supervisor:山口政之
マテリアルサイエンス研究科
修士
Subjects/Keywords: 複屈折; birefringence
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APA ·
Chicago ·
MLA ·
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CSE |
Export
to Zotero / EndNote / Reference
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APA (6th Edition):
岩崎, . (n.d.). セルロース誘導体系複合材料における配向複屈折制御. (Thesis). Japan Advanced Institute of Science and Technology / 北陸先端科学技術大学院大学. Retrieved from http://hdl.handle.net/10119/4239
Note: this citation may be lacking information needed for this citation format:
No year of publication.
Not specified: Masters Thesis or Doctoral Dissertation
Chicago Manual of Style (16th Edition):
岩崎, 拓也. “セルロース誘導体系複合材料における配向複屈折制御.” Thesis, Japan Advanced Institute of Science and Technology / 北陸先端科学技術大学院大学. Accessed February 27, 2021.
http://hdl.handle.net/10119/4239.
Note: this citation may be lacking information needed for this citation format:
No year of publication.
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
岩崎, 拓也. “セルロース誘導体系複合材料における配向複屈折制御.” Web. 27 Feb 2021.
Note: this citation may be lacking information needed for this citation format:
No year of publication.
Vancouver:
岩崎 . セルロース誘導体系複合材料における配向複屈折制御. [Internet] [Thesis]. Japan Advanced Institute of Science and Technology / 北陸先端科学技術大学院大学; [cited 2021 Feb 27].
Available from: http://hdl.handle.net/10119/4239.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
No year of publication.
Council of Science Editors:
岩崎 . セルロース誘導体系複合材料における配向複屈折制御. [Thesis]. Japan Advanced Institute of Science and Technology / 北陸先端科学技術大学院大学; Available from: http://hdl.handle.net/10119/4239
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
No year of publication.
17.
Rosa, Rubens dos Santos.
Avaliação morfológica do colágeno após aquecimento induzido in vivo.
Degree: Mestrado, Bioengenharia, 2007, University of São Paulo
URL: http://www.teses.usp.br/teses/disponiveis/82/82131/tde-13022008-100411/
;
► As terapias térmicas vêm sendo utilizadas com muita freqüência em áreas da saúde, como ortopedia, dermatologia e oftalmologia entre outras. Em média a literatura revela…
(more)
▼ As terapias térmicas vêm sendo utilizadas com muita freqüência em áreas da saúde, como ortopedia, dermatologia e oftalmologia entre outras. Em média a literatura revela que na prática de tratamentos com calor os tecidos são submetidos a temperaturas que não ultrapassam os 45 ºC (igual aproximadamente 8,5 acima da média da temperatura corpórea normal). Este trabalho procurou verificar de fato a possível influência das variações térmicas sobre o colágeno, quanto à possibilidade de desnaturação do mesmo. Utilizou-se 48 ratos (Rattus Novergicus Albinus) da raça Wistar machos, divididos em oito grupos: grupo I Controle (sem alteração térmica), grupo II (35 ºC), III (40 ºC), IV (42 ºC), V (45 ºC), VI (48 ºC), VII (50 ºC), VIII (55 ºC) (cujos membros inferiores foram submersos por 10 minutos em água aquecida com temperatura variável). Em seguida os animais do grupo controle e experimental foram sacrificados, retirando por dissecação e tenotomia os tendões calcâneos que conferidos às lâminas histológicas passaram por análise microscópica de medidas de birrefringência, análise histológica por microscopia de luz e análises por calorimetria exploratória diferencial (DSC). Os resultados mostram que existe uma diferença significativa, dos grupos I a IV, em relação aos grupos V a VII, obtidos pela média de valores de retardos ópticos (RO), após as análises de medidas de birrefringência, confirmados pela análise visual histológica e pela calorimetria exploratória diferencial, sugerindo que em temperaturas elevadas ocorre uma desnaturação da proteína colágeno.
Thermal therapies are being used in orthopedic, dermatology and ophthalmology, among other medical specialties. Literature reveals in the clinical practice of thermal therapies, 45 ºC is the temperature of choice (= 8.5 below human body temperature). The purpose of this study was to quantify changes in the tendon of calcaneous after a range of thermal exposure, and correlate these results with tissue denaturation. It was used 48 Wistar rats (Rattus Novergicus Albinus), male. They grouped as: I (Control) II (35 ºC), III (40 ºC), IV (42 ºC), V (45 ºC), VI(48 ºC), VII (50 ºC), VIII (55 ºC), and had their pad submerged during 10 minutes in hot water (varying from 35 to 55 ºC. Animals were sacrificed and tendon of calcaneous were analyzed by birefringence microscopy, histology (H & E and Trichromic of Masson) and differential scanning calorimetry (DSC). Results showed that there is a significant difference between groups I-IV and V-VIII. Groups I-IV not shows signals of denaturation by heat treatment. Heatings above 45 ºC resulted in thermal denaturation, decreasing o birefringence and changes in histological aspect.
Advisors/Committee Members: Plepis, Ana Maria de Guzzi.
Subjects/Keywords: Birefringence; Birrefringência; Colágeno; Collagen; Desnaturação térmica; Thermal denaturation
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❌
APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Rosa, R. d. S. (2007). Avaliação morfológica do colágeno após aquecimento induzido in vivo. (Masters Thesis). University of São Paulo. Retrieved from http://www.teses.usp.br/teses/disponiveis/82/82131/tde-13022008-100411/ ;
Chicago Manual of Style (16th Edition):
Rosa, Rubens dos Santos. “Avaliação morfológica do colágeno após aquecimento induzido in vivo.” 2007. Masters Thesis, University of São Paulo. Accessed February 27, 2021.
http://www.teses.usp.br/teses/disponiveis/82/82131/tde-13022008-100411/ ;.
MLA Handbook (7th Edition):
Rosa, Rubens dos Santos. “Avaliação morfológica do colágeno após aquecimento induzido in vivo.” 2007. Web. 27 Feb 2021.
Vancouver:
Rosa RdS. Avaliação morfológica do colágeno após aquecimento induzido in vivo. [Internet] [Masters thesis]. University of São Paulo; 2007. [cited 2021 Feb 27].
Available from: http://www.teses.usp.br/teses/disponiveis/82/82131/tde-13022008-100411/ ;.
Council of Science Editors:
Rosa RdS. Avaliação morfológica do colágeno após aquecimento induzido in vivo. [Masters Thesis]. University of São Paulo; 2007. Available from: http://www.teses.usp.br/teses/disponiveis/82/82131/tde-13022008-100411/ ;
18.
Gilfellon, Anthony James.
Using Radio Polarisation to Measure Cosmic Shear and
Birefringence.
Degree: 2019, University of Manchester
URL: http://www.manchester.ac.uk/escholar/uk-ac-man-scw:319139
Subjects/Keywords: Cosmology; Cosmic Shear; Birefringence
…population and the CS, γ, and birefringence, ω, estimator Γ̂ was applied in a suite of Mont-Carlo… …Birefringence
23
24
CHAPTER 1. INTRODUCTION TO CS AND BIREFRINGENCE
Ever since Einstein published… …26
1.1
CHAPTER 1. INTRODUCTION TO CS AND BIREFRINGENCE
Definition and Formalism of… …CS AND BIREFRINGENCE
In polar coordinates the expression of complex shear is
γ = |γ| exp… …works best when considering two
30
CHAPTER 1. INTRODUCTION TO CS AND BIREFRINGENCE…
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❌
APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Gilfellon, A. J. (2019). Using Radio Polarisation to Measure Cosmic Shear and
Birefringence. (Doctoral Dissertation). University of Manchester. Retrieved from http://www.manchester.ac.uk/escholar/uk-ac-man-scw:319139
Chicago Manual of Style (16th Edition):
Gilfellon, Anthony James. “Using Radio Polarisation to Measure Cosmic Shear and
Birefringence.” 2019. Doctoral Dissertation, University of Manchester. Accessed February 27, 2021.
http://www.manchester.ac.uk/escholar/uk-ac-man-scw:319139.
MLA Handbook (7th Edition):
Gilfellon, Anthony James. “Using Radio Polarisation to Measure Cosmic Shear and
Birefringence.” 2019. Web. 27 Feb 2021.
Vancouver:
Gilfellon AJ. Using Radio Polarisation to Measure Cosmic Shear and
Birefringence. [Internet] [Doctoral dissertation]. University of Manchester; 2019. [cited 2021 Feb 27].
Available from: http://www.manchester.ac.uk/escholar/uk-ac-man-scw:319139.
Council of Science Editors:
Gilfellon AJ. Using Radio Polarisation to Measure Cosmic Shear and
Birefringence. [Doctoral Dissertation]. University of Manchester; 2019. Available from: http://www.manchester.ac.uk/escholar/uk-ac-man-scw:319139

University of Missouri – Columbia
19.
Klemme, Jason Paul.
Ultrasonic stress measurement for evaluating the adequacy of gusset plates.
Degree: 2012, University of Missouri – Columbia
URL: http://hdl.handle.net/10355/33247
► [ACCESS RESTRICTED TO THE UNIVERSITY OF MISSOURI AT REQUEST OF AUTHOR.] A significant challenge in determining the safety margin for gusset plates is determining the…
(more)
▼ [ACCESS RESTRICTED TO THE UNIVERSITY OF MISSOURI AT REQUEST OF AUTHOR.] A significant challenge in determining the safety margin for gusset plates is determining the level of stresses carried in the plate. Present technologies are unable to evaluate the dead, live and residual stresses maintained in gusset plates. The goal of the research presented in this thesis is to improve the safety of highway bridges by developing and testing an ultrasonic stress measurement methodology for determining actual stress in steel gusset plates, evaluating the accuracy and precision of the measurements, and assess if the methodology has sufficient accuracy and precision to be a useful tool in the safety analysis of gusset plates. This research utilizes the acoustoelastic effect to evaluate actual stress levels by assessing the acoustic
birefringence in a steel material. The
birefringence measurement evaluates normalized variations of polarized shear waves propagating through the plate thickness, which vary proportionally as a function of stress. This thesis discusses exploratory testing to evaluate the potential of the approach as a tool for the condition assessment of gusset plates.
Advisors/Committee Members: Washer, Glenn A. (advisor).
Subjects/Keywords: ultrasonic stress measurement; safety analysis; gusset plates; acoustic birefringence
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❌
APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Klemme, J. P. (2012). Ultrasonic stress measurement for evaluating the adequacy of gusset plates. (Thesis). University of Missouri – Columbia. Retrieved from http://hdl.handle.net/10355/33247
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Chicago Manual of Style (16th Edition):
Klemme, Jason Paul. “Ultrasonic stress measurement for evaluating the adequacy of gusset plates.” 2012. Thesis, University of Missouri – Columbia. Accessed February 27, 2021.
http://hdl.handle.net/10355/33247.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
Klemme, Jason Paul. “Ultrasonic stress measurement for evaluating the adequacy of gusset plates.” 2012. Web. 27 Feb 2021.
Vancouver:
Klemme JP. Ultrasonic stress measurement for evaluating the adequacy of gusset plates. [Internet] [Thesis]. University of Missouri – Columbia; 2012. [cited 2021 Feb 27].
Available from: http://hdl.handle.net/10355/33247.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
Klemme JP. Ultrasonic stress measurement for evaluating the adequacy of gusset plates. [Thesis]. University of Missouri – Columbia; 2012. Available from: http://hdl.handle.net/10355/33247
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

University of Arizona
20.
Sueoka, Stacey Ritsuyo.
Polarization Optical Components of the Daniel K. Inouye Solar Telescope
.
Degree: 2016, University of Arizona
URL: http://hdl.handle.net/10150/613286
► The Daniel K Inouye Solar Telescope (DKIST), when completed in 2019 will be the largest solar telescope built to date. DKIST will have a suite…
(more)
▼ The Daniel K Inouye Solar Telescope (DKIST), when completed in 2019 will be the largest solar telescope built to date. DKIST will have a suite of first light polarimetric instrumentation requiring broadband polarization modulation and calibration optical elements. Compound crystalline retarders meet the design requirements for efficient modulators and achromatic calibration retarders. These retarders are the only possible large diameter optic that can survive the high flux, 5 arc minute field, and ultraviolet intense environment of a large aperture solar telescope at Gregorian focus. This dissertation presents work performed for the project. First, I measured
birefringence of the candidate materials necessary to complete designs. Then, I modeled the polarization effects with three-dimensional ray-tracing codes as a function of angle of incidence and field of view. Through this analysis I learned that due to the incident converging F/13 beam on the calibration retarders, the previously assumed linear retarder model fails to account for effects above the project polarization specifications. I discuss modeling strategies such as Mueller matrix decompositions and simplifications of those strategies while still meeting fit error requirements. Finally, I present characterization techniques and how these were applied to prototype components.
Advisors/Committee Members: Chipman, Russell A (advisor), Elmore, David F. (committeemember), Tyo, J. Scott (committeemember), Chipman, Russell A. (committeemember).
Subjects/Keywords: DKIST;
Polarimetry;
Polarization;
Retarder;
Solar Polarimetry;
Optical Sciences;
Birefringence
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❌
APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Sueoka, S. R. (2016). Polarization Optical Components of the Daniel K. Inouye Solar Telescope
. (Doctoral Dissertation). University of Arizona. Retrieved from http://hdl.handle.net/10150/613286
Chicago Manual of Style (16th Edition):
Sueoka, Stacey Ritsuyo. “Polarization Optical Components of the Daniel K. Inouye Solar Telescope
.” 2016. Doctoral Dissertation, University of Arizona. Accessed February 27, 2021.
http://hdl.handle.net/10150/613286.
MLA Handbook (7th Edition):
Sueoka, Stacey Ritsuyo. “Polarization Optical Components of the Daniel K. Inouye Solar Telescope
.” 2016. Web. 27 Feb 2021.
Vancouver:
Sueoka SR. Polarization Optical Components of the Daniel K. Inouye Solar Telescope
. [Internet] [Doctoral dissertation]. University of Arizona; 2016. [cited 2021 Feb 27].
Available from: http://hdl.handle.net/10150/613286.
Council of Science Editors:
Sueoka SR. Polarization Optical Components of the Daniel K. Inouye Solar Telescope
. [Doctoral Dissertation]. University of Arizona; 2016. Available from: http://hdl.handle.net/10150/613286
21.
Todorovic, Milos.
Time-Domain Polarization-Sensitive Optical Coherence Tomography in Soft Biological Tissue.
Degree: PhD, Biomedical Engineering, 2009, Texas A&M University
URL: http://hdl.handle.net/1969.1/ETD-TAMU-2888
► A new, high-speed, fiber-based Mueller-matrix optical coherence tomography system with continuous source-polarization modulation is presented. For in vivo experimentation, the sample arm optics are integrated…
(more)
▼ A new, high-speed, fiber-based Mueller-matrix optical coherence tomography
system with continuous source-polarization modulation is presented. For in vivo
experimentation, the sample arm optics are integrated into a hand-held probe. The
system’s parameters were verified through imaging standard optical elements. A unique
feature of polarization-sensitive Mueller optical coherence tomography is that by
measuring Jones or Mueller matrices, it can reveal the complete polarization properties
of biological samples, even in the presence of diattenuation. Presented here for the first
time are mapped local polarization properties of biological samples obtained by using
polar decomposition in combination with least-squares fitting to differentiate measured
integrated Jones matrices with respect to depth. In addition, a new concept of dual
attenuation coefficients to characterize diattenuation per unit infinitesimal length in
tissues is introduced. The algorithm was experimentally verified using measurements of
a section of porcine tendon and the septum of a rat heart. The application of the system for burn imaging and healing monitoring was
demonstrated on porcine skin because of its similarity to the human skin. The results
showed a clear localization of the thermally damaged region. The local
birefringence of
the intravital porcine skin was mapped by using a differentiation algorithm. The burn
areas in the OCT images agree well with the histology, thus demonstrating the system’s
potential for burn-depth determination and post-injury healing monitoring.
Another major application of the fiber-based Mueller-matrix optical coherence
tomography system with continuous source-polarization modulation covered here is in
vivo imaging of early stages of skin cancer. The OCT images of SENCAR mice skin
affected by the tumorigenesis show the structural changes in skin resulting from precancerous
papilloma formations that are consistent with histology, which proves the
system’s potential for early skin cancer detection.
Advisors/Committee Members: Cote, Gerard L. (advisor), Wang, Lihong V. (advisor), Stoica, George (committee member), Yeh, Alvin T. (committee member).
Subjects/Keywords: optical coherence tomography; birefringence
…samples, such as birefringence (with its phase retardation and orientation) and… …constructed in free space, the orientation and the
phase retardation of the birefringence of the… …x29; using the Mueller matrix method [19].
Birefringence contrast describes the… …also present in biological
tissues, although it is usually less pronounced than birefringence… …However, the potential
of birefringence and diattenuation contrasts for determining the depth…
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❌
APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Todorovic, M. (2009). Time-Domain Polarization-Sensitive Optical Coherence Tomography in Soft Biological Tissue. (Doctoral Dissertation). Texas A&M University. Retrieved from http://hdl.handle.net/1969.1/ETD-TAMU-2888
Chicago Manual of Style (16th Edition):
Todorovic, Milos. “Time-Domain Polarization-Sensitive Optical Coherence Tomography in Soft Biological Tissue.” 2009. Doctoral Dissertation, Texas A&M University. Accessed February 27, 2021.
http://hdl.handle.net/1969.1/ETD-TAMU-2888.
MLA Handbook (7th Edition):
Todorovic, Milos. “Time-Domain Polarization-Sensitive Optical Coherence Tomography in Soft Biological Tissue.” 2009. Web. 27 Feb 2021.
Vancouver:
Todorovic M. Time-Domain Polarization-Sensitive Optical Coherence Tomography in Soft Biological Tissue. [Internet] [Doctoral dissertation]. Texas A&M University; 2009. [cited 2021 Feb 27].
Available from: http://hdl.handle.net/1969.1/ETD-TAMU-2888.
Council of Science Editors:
Todorovic M. Time-Domain Polarization-Sensitive Optical Coherence Tomography in Soft Biological Tissue. [Doctoral Dissertation]. Texas A&M University; 2009. Available from: http://hdl.handle.net/1969.1/ETD-TAMU-2888
22.
Karlsson, Sara-Louise.
Investigation of the effect of complex flow fields on cellulose nanofibril suspensions by birefringence imaging
.
Degree: Chalmers tekniska högskola / Institutionen för fysik, 2020, Chalmers University of Technology
URL: http://hdl.handle.net/20.500.12380/300856
► Cellulose is an interesting renewable material with many unique properties. A type of nanocellulose is cellulose nanofibrils (CNF). It has potential to be used as…
(more)
▼ Cellulose is an interesting renewable material with many unique properties. A type
of nanocellulose is cellulose nanofibrils (CNF). It has potential to be used as reinforcement
in composites, to modify the rheology of complex systems in 3D printing
and in fiber production, among other areas. They are relatively long and flexible
particles with both crystalline and amorphous parts. This material can be used to
make stronger materials by increasing the alignment of the fibrils. In all of these
cases, it is crucial to understand the behavior of the material in flow, which is the
focus of this thesis.
The aim with this project is to study how the alignment in cellulose nanofibril
suspensions is affected in different flow types (extensional, shear and two mixed flow
types), how it changes with different flow rates (1 - 50 μL/s) and if it is affected
by the concentration of the suspensions (0.1, 0.25 and 0.5 wt%). To achieve the
different complex flow fields, a fluidic four-roll mill was used. The alignment of
the nanofibers were then determined by a birefringence imager which measured the
retardance, angle of the fast axis and the intensity.
The results showed that the used setup with the fluidic four-roll mill and birefringence
imager can successfully measure the alignment in CNF suspensions, and that
the experiments can be performed continuously with any one wavelength. Dependence
on the concentration of the suspensions, flow rate and flow type was found.
The alignment increased in extensional flow with increasing concentration, but not
in shear flow. The flow rate dependence showed that the alignment increased with
the flow rate for the highest concentration (0.5 wt%), but did not have much effect
on the lowest concentration (0.1 wt%). It was found that extensional flow achieved
more alignment than shear flow in the two higher concentrations of suspensions, but
that the flow type had less effect in the lowest concentration. An unexpected dependency
on the age of the sample and the assembly of the device was also observed.
Subjects/Keywords: cellulose nanofibrils;
fluidic four-roll mill;
birefringence imager;
alignment
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❌
APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Karlsson, S. (2020). Investigation of the effect of complex flow fields on cellulose nanofibril suspensions by birefringence imaging
. (Thesis). Chalmers University of Technology. Retrieved from http://hdl.handle.net/20.500.12380/300856
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Chicago Manual of Style (16th Edition):
Karlsson, Sara-Louise. “Investigation of the effect of complex flow fields on cellulose nanofibril suspensions by birefringence imaging
.” 2020. Thesis, Chalmers University of Technology. Accessed February 27, 2021.
http://hdl.handle.net/20.500.12380/300856.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
Karlsson, Sara-Louise. “Investigation of the effect of complex flow fields on cellulose nanofibril suspensions by birefringence imaging
.” 2020. Web. 27 Feb 2021.
Vancouver:
Karlsson S. Investigation of the effect of complex flow fields on cellulose nanofibril suspensions by birefringence imaging
. [Internet] [Thesis]. Chalmers University of Technology; 2020. [cited 2021 Feb 27].
Available from: http://hdl.handle.net/20.500.12380/300856.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
Karlsson S. Investigation of the effect of complex flow fields on cellulose nanofibril suspensions by birefringence imaging
. [Thesis]. Chalmers University of Technology; 2020. Available from: http://hdl.handle.net/20.500.12380/300856
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

NSYSU
23.
Lin, Jing-Yuan.
Hybrid Organic-Inorganic Optical Waveguides for Lightwave Communication.
Degree: PhD, Electro-Optical Engineering, 2005, NSYSU
URL: http://etd.lib.nsysu.edu.tw/ETD-db/ETD-search/view_etd?URN=etd-0614105-114342
► Hybrid waveguides based on antiresonant reflecting optical waveguide (ARROW) structure on Si substrates is investigated. The core layer of the waveguide is separated from the…
(more)
▼ Hybrid waveguides based on antiresonant reflecting optical waveguide (ARROW) structure on Si substrates is investigated. The core layer of the waveguide is separated from the Si substrate by interference cladding which consists of a high index first cladding layer and a low index second cladding layer. The Ta2O5 first cladding layer was grown by rf magnetron sputtering system. The SiON second cladding layer was deposited by plasma-enhanced chemical vapor deposition (PECVD) based on the reaction of SiH4/N2O mixtures. Typical propagation losses of the waveguides using this SiON material system are less than 0.15 dB/cm. The high quality cladding layers are prepared to form the Fabry-Perot cavities to ensure low loss operation of the ARROW device at antiresonant conditions.
Two methods were proposed to demonstrate the enormous applications of hybrid ARROW waveguides. First, polyimide/Ta2O5/SiON ARROWs were fabricated to achieve high extinction ratio waveguide polarizers. This is accomplished by tuning the operating point of the TM0 mode from antiresonant condition toward high-order antiresonance of the second cladding layer utilizing
birefringence of the waveguide core. The measured extinction ratio and insertion loss of a 2-cm-long ARROW polarizer are 40 dB and 2.2 dB, respectively.
In addition, the temperature dependence of refractive index of organic-inorganic sol-gel glasses was measured by Mach-Zehnder interferometry using the ARROW waveguides. The Sol-gel/Ta2O5/SiO2 ARROWs were fabricated to characterize index-to-temperature coefficients (dn/dT) of the sol-gel glasses because the optical confinement factor of the ARROW is very close to 1. The measured index-to-temperature coefficients of the sol-gel glasses with different compositions are negative and are on the order of 10-4.
Advisors/Committee Members: Chun-Hsun Chu (chair), Ann-Kuo Chu (committee member), San-Liang Lee (chair), Hung-Wen Chang (chair), Ju-Tah Tung (chair), Daniel Yen Chu (chair).
Subjects/Keywords: sol-gel; polarizer; Arrow waveguide; birefringence
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APA ·
Chicago ·
MLA ·
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CSE |
Export
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APA (6th Edition):
Lin, J. (2005). Hybrid Organic-Inorganic Optical Waveguides for Lightwave Communication. (Doctoral Dissertation). NSYSU. Retrieved from http://etd.lib.nsysu.edu.tw/ETD-db/ETD-search/view_etd?URN=etd-0614105-114342
Chicago Manual of Style (16th Edition):
Lin, Jing-Yuan. “Hybrid Organic-Inorganic Optical Waveguides for Lightwave Communication.” 2005. Doctoral Dissertation, NSYSU. Accessed February 27, 2021.
http://etd.lib.nsysu.edu.tw/ETD-db/ETD-search/view_etd?URN=etd-0614105-114342.
MLA Handbook (7th Edition):
Lin, Jing-Yuan. “Hybrid Organic-Inorganic Optical Waveguides for Lightwave Communication.” 2005. Web. 27 Feb 2021.
Vancouver:
Lin J. Hybrid Organic-Inorganic Optical Waveguides for Lightwave Communication. [Internet] [Doctoral dissertation]. NSYSU; 2005. [cited 2021 Feb 27].
Available from: http://etd.lib.nsysu.edu.tw/ETD-db/ETD-search/view_etd?URN=etd-0614105-114342.
Council of Science Editors:
Lin J. Hybrid Organic-Inorganic Optical Waveguides for Lightwave Communication. [Doctoral Dissertation]. NSYSU; 2005. Available from: http://etd.lib.nsysu.edu.tw/ETD-db/ETD-search/view_etd?URN=etd-0614105-114342
24.
Reis, Ana Guiomar Matos Santiago.
Avaliação da aplicação do ultrassom terapêutico em tendinites de equinos.
Degree: Mestrado, Clínica Veterinária, 2009, University of São Paulo
URL: http://www.teses.usp.br/teses/disponiveis/10/10136/tde-15072009-113125/
;
► Os equinos atletas, especialmente os cavalos de corrida, são frequentemente acometidos por lesões do sistema locomotor. A tendinite é uma enfermidade frequente, sendo o flexor…
(more)
▼ Os equinos atletas, especialmente os cavalos de corrida, são frequentemente acometidos por lesões do sistema locomotor. A tendinite é uma enfermidade frequente, sendo o flexor digital superficial (TFDS) o mais acometido. Muitos dos métodos de tratamento para lesões de tendão são utilizados, mas poucos proporcionam cura eficiente e duradoura. Este trabalho tem por finalidade investigar o efeito do ultrassom terapêutico (UST) no processo de cicatrização do TFDS em equinos. Para tanto foram utilizados 20 equinos da raça Puro Sangue Inglês, com idade variando entre dois e nove anos, machos e fêmeas, distribuídos em três grupos (G1, G2 e G3). O G1 foi formado por oito animais, sendo que os TFDS de seus membros torácicos não foram infiltrados com colagenase e nem expostos ao UST. O G2 e o G3 foram compostos por seis animais cada. A indução da lesão foi realizada no terço médio do TFDS com 1ml da solução de colagenase (2,5mg/ml), em todos os membros torácicos dos animais do G2 e do G3. A cicatrização dos tendões foi acompanhada pelos exames clínicos e ultrassonográficos. Aleatoriamente, apenas um membro torácico de cada cavalo do G2 e do G3 foi tratado com UST, modo pulsado (ciclo de trabalho 20%), frequência de 1 MHz e intensidade 0,5 W/cm2 (SATA spatial average temporal average), por 5 minutos. Foram colhidas amostras de tecido tendíneo lesado no 15° dia após o início do tratamento (T15) no G2 para determinar a expressão das proteínas IGF-1, TGF-β1 e PCNA por imunoistoquimica; no 60° dia após o início do tratamento (T60) no G3 para detectar e mensurar a variação da organização dos feixes de colágenos por análise da birrefringência. Não foram observadas diferenças clínicas entre os membros tratados e não tratados dos grupos G2 e G3. Por meio da avaliação ultrassonográfica observou-se que o tamanho e ecogenicidade do tendão, tamanho e ecogenicidade da lesão, alinhamento longitudinal das fibras dos membros tratados do G3 não diferiram de tendões normais (G1) (P>0,05). Não houve diferença estatística entre os grupos para a expressão de PCNA. Entretanto, os membros tratados do G2 apresentaram maior expressão do TGF-β1, enquanto os membros não tratados apresentaram maior expressão para o IGF-1 (P<0,05). Os resultados da birrefringência mostraram diferença estatística significativa entre o G1 e os membros não tratados do G3 e, entre os membros tratados e não tratados do G3 (P<0,001). A análise dos resultados sugere que o tempo de tratamento com UST não foi suficiente no G2 para promover regeneração do tendão, mas alterou a expressão de IGF-1 e TGF-β1, indicando aceleração do processo cicatricial. Já a irradiação do UST no G3 promoveu reorganização, agregação das fibras de colágeno e regeneração do tendão. Conclui-se que, este protocolo de tratamento de UST é eficaz tanto para acelerar o processo de cicatrização do tendão, como para melhorar a organização de suas fibras de colágeno.
Equine athletes are frequently afflicted with locomotor injuries, especially racing horses. Tendinitis is a common problem of…
Advisors/Committee Members: Baccarin, Raquel Yvonne Arantes.
Subjects/Keywords: Birefringence; Birrefringência; Equine; Equino; Immunohistochemistry; Imunoistoquímica; Tendinite; Tendinitis; Therapeutic ultrasound; Ultrassom terapêutico
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❌
APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Reis, A. G. M. S. (2009). Avaliação da aplicação do ultrassom terapêutico em tendinites de equinos. (Masters Thesis). University of São Paulo. Retrieved from http://www.teses.usp.br/teses/disponiveis/10/10136/tde-15072009-113125/ ;
Chicago Manual of Style (16th Edition):
Reis, Ana Guiomar Matos Santiago. “Avaliação da aplicação do ultrassom terapêutico em tendinites de equinos.” 2009. Masters Thesis, University of São Paulo. Accessed February 27, 2021.
http://www.teses.usp.br/teses/disponiveis/10/10136/tde-15072009-113125/ ;.
MLA Handbook (7th Edition):
Reis, Ana Guiomar Matos Santiago. “Avaliação da aplicação do ultrassom terapêutico em tendinites de equinos.” 2009. Web. 27 Feb 2021.
Vancouver:
Reis AGMS. Avaliação da aplicação do ultrassom terapêutico em tendinites de equinos. [Internet] [Masters thesis]. University of São Paulo; 2009. [cited 2021 Feb 27].
Available from: http://www.teses.usp.br/teses/disponiveis/10/10136/tde-15072009-113125/ ;.
Council of Science Editors:
Reis AGMS. Avaliação da aplicação do ultrassom terapêutico em tendinites de equinos. [Masters Thesis]. University of São Paulo; 2009. Available from: http://www.teses.usp.br/teses/disponiveis/10/10136/tde-15072009-113125/ ;
25.
Sena, Cleidilane de Oliveira.
\"Caracterização estrutural e óptica de elastômeros dopados com ferrofluidos\".
Degree: Mestrado, Física, 2007, University of São Paulo
URL: http://www.teses.usp.br/teses/disponiveis/43/43134/tde-07052007-120528/
;
► Este trabalho visa a caracterização estrutural, mecânica e óptica de elastômeros de uretâno/uréia (PU/PBDO), baseados em óxido de poli(propileno) e poli(butenodiol), puro, após inflação em…
(more)
▼ Este trabalho visa a caracterização estrutural, mecânica e óptica de elastômeros de uretâno/uréia (PU/PBDO), baseados em óxido de poli(propileno) e poli(butenodiol), puro, após inflação em tolueno e dopados com ferrofluido. As proporções em massa (%) de PU e PBDO utilizadas são 40/60, 50/50, 60/40 e 80/20. As análises estruturais foram feitas através das técnicas de microscopia óptica de luz polarizada, microscopia de força atômica e magnética, e microscopia confocal de varredura laser com as quais foi verificado que os filmes são isotrópicos e autofluorescentes. A amostra após inflação com tolueno não apresenta diferença em sua textura em relação a amostra pura. As amostras dopadas apresentam coloração marrom devido aos grãos magnéticos. Também verificamos que o processo de dopagem com inflação dos filmes em solução de tolueno e ferrofluido é eficiente, uma vez que o filme não apresenta grandes agregados de grãos magnéticos. Medidas do coeficiente de absorção óptica mostraram que o tempo de inflação das amostras em tolueno não altera de forma significativa esses filmes. Também verificamos que o tempo, de imersão do filme na solução de tolueno e ferrofluido, para que as amostras incorporem a maior quantidade de grãos magnéticos aumenta com a concentração de PU. O número de grãos magnéticos na matriz elastomérica não aumenta depois que a amostra atinge o nível de saturação. Experimentos mecânicos e ópticos mostram que o processo de preparação do elastômero (casting) introduz uma anisotropia estrutural nas amostras opticamente isotrópicas. Esse fato foi evidenciado pelas medidas do módulo de Young e orientação do eixo óptico das amostras sob estiramento. A dependência da diferença de fase e consequentemente da birrefringência óptica em amostras puras, após inflação com tolueno e dopadas com ferrofluido, com a deformação é linear. O coeficiente de deformação óptico também é linear com a concentração de ferrofluido. Para todos os tempos de inflação em tolueno e ferrofluido as amostras 50/50 e 60/40 foram as que apresentaram maior birrefringência induzida por estiramento.
This work aims the structural, mechanical and optical characterization of urethane/urea elastomers (PU/PBDO), based on polypropylene oxide and polybutadiene diol, pure, after swelling in toluene and doped with ferrofluid. The ratios in weight % of PU and PBDO used are 40/60, 50/50, 60/40 and 80/20. The structural analysis were made through of polarized light microscopy, atomic and magnetic force microscopy, and confocal laser scanning microscopy techniques in such was verified that films are isotropics and autofluorescents. The sample after swelling with toluene does not present difference in its texture compared with pure sample. Doped samples present brown color due the magnetic grains. It was also verified that doping process by swelling of film in solution of ferrofluid with toluene is efficient because the film not shows large aggregates of magnetic grains. Measurements of optical absorption coefficient show that the swelling time of the…
Advisors/Committee Members: Figueiredo Neto, Antonio Martins.
Subjects/Keywords: birefringence; birrefringência; deformação; dopagem; doping; Elastomer; Elastômero; ferrofluid; ferrofluido; polímero; polymer; strain
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❌
APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Sena, C. d. O. (2007). \"Caracterização estrutural e óptica de elastômeros dopados com ferrofluidos\". (Masters Thesis). University of São Paulo. Retrieved from http://www.teses.usp.br/teses/disponiveis/43/43134/tde-07052007-120528/ ;
Chicago Manual of Style (16th Edition):
Sena, Cleidilane de Oliveira. “\"Caracterização estrutural e óptica de elastômeros dopados com ferrofluidos\".” 2007. Masters Thesis, University of São Paulo. Accessed February 27, 2021.
http://www.teses.usp.br/teses/disponiveis/43/43134/tde-07052007-120528/ ;.
MLA Handbook (7th Edition):
Sena, Cleidilane de Oliveira. “\"Caracterização estrutural e óptica de elastômeros dopados com ferrofluidos\".” 2007. Web. 27 Feb 2021.
Vancouver:
Sena CdO. \"Caracterização estrutural e óptica de elastômeros dopados com ferrofluidos\". [Internet] [Masters thesis]. University of São Paulo; 2007. [cited 2021 Feb 27].
Available from: http://www.teses.usp.br/teses/disponiveis/43/43134/tde-07052007-120528/ ;.
Council of Science Editors:
Sena CdO. \"Caracterização estrutural e óptica de elastômeros dopados com ferrofluidos\". [Masters Thesis]. University of São Paulo; 2007. Available from: http://www.teses.usp.br/teses/disponiveis/43/43134/tde-07052007-120528/ ;
26.
Martins, Emiliano Rezende.
Modelagem de geração de luz supercontínua.
Degree: Mestrado, Telecomunicações, 2008, University of São Paulo
URL: http://www.teses.usp.br/teses/disponiveis/18/18155/tde-04032009-145357/
;
► Geração de luz supercontínua é um efeito caracterizado por um forte alargamento espectral induzido por efeitos não-lineares no meio óptico, e que encontra uma vasta…
(more)
▼ Geração de luz supercontínua é um efeito caracterizado por um forte alargamento espectral induzido por efeitos não-lineares no meio óptico, e que encontra uma vasta gama de aplicações, como tomografia por coerência óptica, espectroscopia e metrologia de freqüência. No presente trabalho, os fenômenos físicos responsáveis pela geração de luz supercontínua são estudados teoricamente, utilizando a ferramenta numérica desenvolvida para dar suporte à teoria. Os efeitos de polarização relacionados à geração de luz supercontínua também são analisados e, neste contexto, a utilização de uma fibra de cristal fotônico com formato tipo-D e alta birrefringência é proposta para servir como meio óptico. As características do supercontínuo gerado nesta fibra são analisadas teoricamente, novamente com o apoio da ferramenta numérica. A análise conclui que a fibra proposta apresenta consideráveis vantagens em relação às fibras convencionais, principalmente por ser capaz de manter o estado de polarização da luz supercontínua estável.
Supercontinuum generation is an effect characterized by a strong spectral broadening induced by nonlinear effects in the optical medium. There is a wide range of applications for this effect, such as optical coherence tomography, spectroscopy and frequency metrology. In this work, the physical phenomena responsible for supercontinuum generation are theoretically studied relying on the developed numerical tool to support the theory. The polarization effects related to supercontinuum generation are also assessed and, in this context, a highly birefringent D-shaped photonic crystal fiber is proposed as a medium for supercontinuum generation. The characteristics of supercontinuum generation in the proposed fiber are theoretically analyzed. The analysis concludes that the proposed fiber shows considerable advantages over conventional fibers, mainly due to the capability to keep the state of polarization of the supercontinuum stable.
Advisors/Committee Members: Borges, Ben-Hur Viana.
Subjects/Keywords: Birefringence; Birrefringência; Fibras ópticas; Nonlinear optics; Óptica não linear; Optical fibers; Supercontínuo; Supercontinuum
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❌
APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Martins, E. R. (2008). Modelagem de geração de luz supercontínua. (Masters Thesis). University of São Paulo. Retrieved from http://www.teses.usp.br/teses/disponiveis/18/18155/tde-04032009-145357/ ;
Chicago Manual of Style (16th Edition):
Martins, Emiliano Rezende. “Modelagem de geração de luz supercontínua.” 2008. Masters Thesis, University of São Paulo. Accessed February 27, 2021.
http://www.teses.usp.br/teses/disponiveis/18/18155/tde-04032009-145357/ ;.
MLA Handbook (7th Edition):
Martins, Emiliano Rezende. “Modelagem de geração de luz supercontínua.” 2008. Web. 27 Feb 2021.
Vancouver:
Martins ER. Modelagem de geração de luz supercontínua. [Internet] [Masters thesis]. University of São Paulo; 2008. [cited 2021 Feb 27].
Available from: http://www.teses.usp.br/teses/disponiveis/18/18155/tde-04032009-145357/ ;.
Council of Science Editors:
Martins ER. Modelagem de geração de luz supercontínua. [Masters Thesis]. University of São Paulo; 2008. Available from: http://www.teses.usp.br/teses/disponiveis/18/18155/tde-04032009-145357/ ;
27.
Visnardi, Ana Rosa.
Efeito do ultra-som de baixa intensidade no colágeno da pele sadia de ratos.
Degree: Mestrado, Bioengenharia, 2007, University of São Paulo
URL: http://www.teses.usp.br/teses/disponiveis/82/82131/tde-14022008-105151/
;
► O ultra-som de baixa intensidade é um recurso que vem sendo explorado em vários tipos de tecidos, inclusive a pele, porém os estudos buscam resultados…
(more)
▼ O ultra-som de baixa intensidade é um recurso que vem sendo explorado em vários tipos de tecidos, inclusive a pele, porém os estudos buscam resultados em pele em reparação. Este estudo tem a finalidade de avaliar a eficáia do ultra-som de baixa intensidade no colágeno da pele sadia de ratos, visando analisar o comportamento das fibras de colágeno da derme, por meio da birrefringência e da análise histológica. Foi utilizado um aparelho de ultra-som de 30 mW/\'CM POT.2(́SATA), modo pulsado, com frequência de 1,5 MHz, largura de pulso de 200 milisegundos. Os animais utilizados foram 15 ratos e divididos aleatoriamente em 3 grupos (5 animais cada): grupo Ultra-som (US), tratado com ultra-som; grupo Placebo (PL), submetido à irradiação simulada; e grupo Controle (C). A irradiação foi aplicada na pele do dorso dos animais durante 10 minutos, em 10 aplicações consecutivas com intervalo de 2 dias após a quinta aplicação. Amostras da pele dos animais foram submetidas à análise de birrefringência com microscopia de luz polarizada, através de medidas de retardo óptico (RO) e à análise histológica. As medidas de RO foram submetidas à análise estatística por meio do teste de variância Anova, com nível de significância de 5%, e ao teste de Tukey. O grupo US apresentou a menor média de RO (26,03), comparando com os grupos C (31,09) e PL (29,07) e as diferenças entre as médias foram significativas (p<0,01). Estes dados demonstram que a ação do ultra-som de baixa intensidade altera o comportamento das fibras de colágeno, causando uma desorganização das fibras uma vez que quanto maior o RO, maior a organização das fibras de colágeno. Analisando as medidas separadamente para cada camada da pele observa-se que a derme papilar e a derme reticular não apresentaram o mesmo comportamento. A ação do ultra-som mostrou-se mais acentuada na camada reticular, pois esta apresentou o menor valor de média de RO (22,51). Os dados do grupo PL demonstraram que há uma ação da irradiação simulada, porém não na mesma intensidade que a do grupo US. Nas áreas adjacentes à superfície da pele irradiada, não houve ação do ultra-som, pois as médias de RO não foram diferentes estatisticamente do grupo C. Na análise histológica pode observar as fibras de colágeno do grupo US com aspecto mais compacto em relação aos demais grupos, porém num nível moderado. Conclui-se que o ultra-som de baixa intensidade, nas condições deste estudo, altera a organização das fibras de colágeno na derme, de maneira mais acentuada na camada reticular, promovendo uma desorganização das fibras.
The low intensity ultrasound is a resource that is been explored over many different kinds of tissues, including skin. However, most studies attempt only to the skin healing process. The objective of this study was to evaluate the behavior of collagen fibers in the derm when exposed to the low intensity ultrasound through birefringence and histological analysis. The ultrasound equipment used had 30 mW/\'CM POT.2(́SATA) pulsing model, frequency of 1.5 MHz and pulse width of 200…
Advisors/Committee Members: Plepis, Ana Maria de Guzzi.
Subjects/Keywords: Birefringence; Birrefringência; Colágeno; Collagen; Low intensity ultrasound; Pele; Skin; Ultra-som de baixa intensidade
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❌
APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Visnardi, A. R. (2007). Efeito do ultra-som de baixa intensidade no colágeno da pele sadia de ratos. (Masters Thesis). University of São Paulo. Retrieved from http://www.teses.usp.br/teses/disponiveis/82/82131/tde-14022008-105151/ ;
Chicago Manual of Style (16th Edition):
Visnardi, Ana Rosa. “Efeito do ultra-som de baixa intensidade no colágeno da pele sadia de ratos.” 2007. Masters Thesis, University of São Paulo. Accessed February 27, 2021.
http://www.teses.usp.br/teses/disponiveis/82/82131/tde-14022008-105151/ ;.
MLA Handbook (7th Edition):
Visnardi, Ana Rosa. “Efeito do ultra-som de baixa intensidade no colágeno da pele sadia de ratos.” 2007. Web. 27 Feb 2021.
Vancouver:
Visnardi AR. Efeito do ultra-som de baixa intensidade no colágeno da pele sadia de ratos. [Internet] [Masters thesis]. University of São Paulo; 2007. [cited 2021 Feb 27].
Available from: http://www.teses.usp.br/teses/disponiveis/82/82131/tde-14022008-105151/ ;.
Council of Science Editors:
Visnardi AR. Efeito do ultra-som de baixa intensidade no colágeno da pele sadia de ratos. [Masters Thesis]. University of São Paulo; 2007. Available from: http://www.teses.usp.br/teses/disponiveis/82/82131/tde-14022008-105151/ ;

Texas A&M University
28.
Malik, Bilal Hameed.
Dual Wavelength Polarimetry for Glucose Sensing in the Anterior Chamber of the Eye.
Degree: PhD, Biomedical Engineering, 2012, Texas A&M University
URL: http://hdl.handle.net/1969.1/ETD-TAMU-2011-12-10380
► Clinical guidelines dictate that frequent blood glucose monitoring in diabetic patients is critical towards proper management of the disease. Although, several different types of glucose…
(more)
▼ Clinical guidelines dictate that frequent blood glucose monitoring in diabetic patients is critical towards proper management of the disease. Although, several different types of glucose monitors are now commercially available, most of these devices are invasive, thereby adversely affecting patient compliance. To this end, optical polarimetric glucose sensing through the eye has been proposed as a potential noninvasive means to aid in the control of diabetes. Arguably, the most critical and limiting factor towards successful application of such a technique is the time varying corneal
birefringence due to eye motion artifact.
In the first part of this research, we describe a birefringent ocular model along with a geometric ray tracing scheme to serve as a tool towards better understanding of the cornea’s
birefringence properties. The simulations show that index-unmatched coupling of light is spatially limited to a smaller range when compared to index-matched situation. Polarimetric measurements on rabbits’ eyes indicate relative agreement between the modeled and experimental values of corneal
birefringence. In addition, the observed rotation in the plane of polarized light for multiple wavelengths demonstrates the potential for using a dual-wavelength polarimetric approach to overcome the noise due to time-varying corneal
birefringence. These results will ultimately aid in the development of an appropriate eye coupling mechanism for in vivo polarimetric glucose measurements.
The latter part of the dissertation focuses on design and development of a dual wavelength optical polarimeter. The described system utilizes real-time closed-loop feedback based on proportional-integral-derivative (PID) control, which effectively reduced the time taken by the system to stabilize while minimizing the effect of motion artifact, which appears as common noise source for both the wavelengths. Glucose measurements performed in both in vitro and ex vivo conditions demonstrate the sensitivity of the current system. Finally, in vivo results in rabbits indicate that dual-wavelength polarimetry has the potential to noninvasively probe glucose through the anterior chamber of the eye.
Advisors/Committee Members: Cote, Gerard L. (advisor), Meissner, Kenith E. (committee member), Applegate, Brian E. (committee member), Su, Chin B. (committee member).
Subjects/Keywords: glucose sensing; corneal birefringence; dual wavelength; polarimetry; anterior chamber of the eye
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APA (6th Edition):
Malik, B. H. (2012). Dual Wavelength Polarimetry for Glucose Sensing in the Anterior Chamber of the Eye. (Doctoral Dissertation). Texas A&M University. Retrieved from http://hdl.handle.net/1969.1/ETD-TAMU-2011-12-10380
Chicago Manual of Style (16th Edition):
Malik, Bilal Hameed. “Dual Wavelength Polarimetry for Glucose Sensing in the Anterior Chamber of the Eye.” 2012. Doctoral Dissertation, Texas A&M University. Accessed February 27, 2021.
http://hdl.handle.net/1969.1/ETD-TAMU-2011-12-10380.
MLA Handbook (7th Edition):
Malik, Bilal Hameed. “Dual Wavelength Polarimetry for Glucose Sensing in the Anterior Chamber of the Eye.” 2012. Web. 27 Feb 2021.
Vancouver:
Malik BH. Dual Wavelength Polarimetry for Glucose Sensing in the Anterior Chamber of the Eye. [Internet] [Doctoral dissertation]. Texas A&M University; 2012. [cited 2021 Feb 27].
Available from: http://hdl.handle.net/1969.1/ETD-TAMU-2011-12-10380.
Council of Science Editors:
Malik BH. Dual Wavelength Polarimetry for Glucose Sensing in the Anterior Chamber of the Eye. [Doctoral Dissertation]. Texas A&M University; 2012. Available from: http://hdl.handle.net/1969.1/ETD-TAMU-2011-12-10380

Texas A&M University
29.
Wan, Qiujie.
Dual wavelength polarimetry for monitoring glucose in the presence of varying birefringence.
Degree: MS, Biomedical Engineering, 2006, Texas A&M University
URL: http://hdl.handle.net/1969.1/3335
► In a continuing effort to develop a noninvasive means of monitoring glucose levels using the aqueous humor of the eye, a dual wavelength system has…
(more)
▼ In a continuing effort to develop a noninvasive means of monitoring glucose levels
using the aqueous humor of the eye, a dual wavelength system has been developed in
order to show that varying
birefringence, similar to what is seen with a moving cornea,
can be compensated. In this paper a dual wavelength, closed-loop, system was designed
and a model was developed to extract the glucose concentration information. The system
and model were tested using various concentrations of glucose in a birefringent test cell
subject to motion artifact. The results show that for a static, non-moving sample, glucose
can be predicted to within 10 mg/dl for the entire physiologic range (0-600mg/dl) for
either laser wavelength (523nm or 635nm). In the presence of moving
birefringence,
each individual wavelength produced standard errors on the order of a few thousand
mg/dL. However, when the two wavelengths are combined into the developed model,
this error is less than 20mg/dL. The approach shows that multiple wavelengths can be
used to drastically reduce the error in the presence of a moving birefringent sample. This
research also shows promising preliminary results that the error is less than 25mg/dl in
presence of a motion induced cornea
birefringence artifact in NZW rabbits eyes.
Advisors/Committee Members: Coté, Gerard (advisor), Taylor, Henry (committee member), Wang, Lihong (committee member).
Subjects/Keywords: diabetes; noninvasive; polarimetry; glucose sensing; birefringence
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❌
APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Wan, Q. (2006). Dual wavelength polarimetry for monitoring glucose in the presence of varying birefringence. (Masters Thesis). Texas A&M University. Retrieved from http://hdl.handle.net/1969.1/3335
Chicago Manual of Style (16th Edition):
Wan, Qiujie. “Dual wavelength polarimetry for monitoring glucose in the presence of varying birefringence.” 2006. Masters Thesis, Texas A&M University. Accessed February 27, 2021.
http://hdl.handle.net/1969.1/3335.
MLA Handbook (7th Edition):
Wan, Qiujie. “Dual wavelength polarimetry for monitoring glucose in the presence of varying birefringence.” 2006. Web. 27 Feb 2021.
Vancouver:
Wan Q. Dual wavelength polarimetry for monitoring glucose in the presence of varying birefringence. [Internet] [Masters thesis]. Texas A&M University; 2006. [cited 2021 Feb 27].
Available from: http://hdl.handle.net/1969.1/3335.
Council of Science Editors:
Wan Q. Dual wavelength polarimetry for monitoring glucose in the presence of varying birefringence. [Masters Thesis]. Texas A&M University; 2006. Available from: http://hdl.handle.net/1969.1/3335

University of Waterloo
30.
Slaman, Sebstian.
Understanding Polarization Distortions for Real-world Quantum Key Distribution.
Degree: 2020, University of Waterloo
URL: http://hdl.handle.net/10012/15869
► The field of quantum key distribution (QKD) has seen many advancements since its conception in 1984. Recently there have been developments towards establishing free space…
(more)
▼ The field of quantum key distribution (QKD) has seen many advancements since its conception in 1984. Recently there have been developments towards establishing free space optical links between satellites and earth to enable global QKD networks. Polarization encoded photos are commonly utilized as qubits for these free space links, placing polarization distortion constrains on the optics used.
Two polarization distortion studies were conducted in this thesis. The first is a simulation of stress induced birefringence in the Window Observational Research Facility window on board the International Space Station (ISS). Atmospherics pressure inside the ISS elicits stress on window leading to optical birefringence, which in turn can distort the polarization of photons as they pass through the window. The model studies the birefringent effects for incoming optical beams over different polarizations, diameters and incoming angles.
As part of free space optical quantum links, it can be beneficial to utilize beam steering optics to manage the spatial positioning of various components in the system. Implementing beam steering optics can aid in achieving spatial and maneuverability requirements for ground stations and satellites as they track each other. However, these optics can have an adverse effect on incoming photon polarization states. Because of this, the effects of various different beam steering configurations were characterized experimentally, and compared to a corresponding simulated model.
The studies presented in this thesis have revealed that common optics such as windows and mirrors can distort polarization based quantum signals. The polarization distortion of the studied optics have shown high dependencies on the angular orientation of the incoming optical beam. However, the distortions measured can be noticeably reduced by implementing compensation optics. As a result, their distortions are not detrimental to a quantum link that utilizes them. The studies presented in this thesis are critical to the design of polarization based quantum receivers as they shed light on potential sources of link distortions. This work is part of a large collection of developments bringing the implementation of global quantum key distribution networks closer to reality.
Subjects/Keywords: qkd; qber; quantum key distribution; satellite communication; polarization distortion; birefringence; Artificial satellites in telecommunication
Record Details
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Share »
Record Details
Similar Records
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❌
APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Slaman, S. (2020). Understanding Polarization Distortions for Real-world Quantum Key Distribution. (Thesis). University of Waterloo. Retrieved from http://hdl.handle.net/10012/15869
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Chicago Manual of Style (16th Edition):
Slaman, Sebstian. “Understanding Polarization Distortions for Real-world Quantum Key Distribution.” 2020. Thesis, University of Waterloo. Accessed February 27, 2021.
http://hdl.handle.net/10012/15869.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
Slaman, Sebstian. “Understanding Polarization Distortions for Real-world Quantum Key Distribution.” 2020. Web. 27 Feb 2021.
Vancouver:
Slaman S. Understanding Polarization Distortions for Real-world Quantum Key Distribution. [Internet] [Thesis]. University of Waterloo; 2020. [cited 2021 Feb 27].
Available from: http://hdl.handle.net/10012/15869.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
Slaman S. Understanding Polarization Distortions for Real-world Quantum Key Distribution. [Thesis]. University of Waterloo; 2020. Available from: http://hdl.handle.net/10012/15869
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
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