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Relevant bibliographies by topics / Optical methods / Dissertations / Theses

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Dissertations / Theses on the topic 'Optical methods'

Author: Grafiati

Published: 4 June 2021

Last updated: 25 July 2025

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1

Sawyer, Nicolas B. E. "Novel optical surface metrology methods." Thesis, University of Nottingham, 1999. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.287239.

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2

O'Neill, Sean Francis. "Optical methods of acoustic detection." Thesis, University of Kent, 2000. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.270811.

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3

Adie, Steven G. "Enhancement of contrast in optical coherence tomography : new modes, methods and technology." University of Western Australia. School of Electrical, Electronic and Computer Engineering, 2007. http://theses.library.uwa.edu.au/adt-WU2007.0127.

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This thesis is concerned with exploiting the native optical coherence tomography (OCT) contrast mechanism in new ways and with a new contrast mechanism, in both cases to enhance the information content of the tomographic image. Through experiments in microsphere solutions, we show that static speckle contains information about local particle density when the effective number of scatterers in the OCT resolution volume is less than about five. This potentially provides contrast enhancement in OCT images based on local scatterer density, and we discuss the experimental conditions suited to utilis

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4

Marthinsen, Håkon. "Numerical Methods for Optical Interference Filters." Thesis, Norwegian University of Science and Technology, Department of Mathematical Sciences, 2009. http://urn.kb.se/resolve?urn=urn:nbn:no:ntnu:diva-9966.

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<p>We present the physics behind general optical interference filters and the design of dielectric anti-reflective filters. These can be anti-reflective at a single wavelength or in an interval. We solve the first case exactly for single and multiple layers and then present how the second case can be solved through the minimisation of an objective function. Next, we present several optimisation methods that are later used to solve the design problem. Finally, we test the different optimisation methods on a test problem and then compare the results with those obtained by the OpenFilters compute

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5

Ho, Gung-Hsuan. "Multiplexed optical data storage - writing methods." Thesis, Imperial College London, 2009. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.506050.

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6

Zhang, Bufa. "Optical methods of thermal diffusivity measurement." Thesis, London South Bank University, 1996. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.336374.

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7

Dworski, Shechar. "Atom optical methods for surface studies." Thesis, University of Cambridge, 2004. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.615678.

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8

Cong, Alexander Xiao. "Reconstruction Methods for Optical Molecular Tomography." Diss., Virginia Tech, 2013. http://hdl.handle.net/10919/19253.

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Molecular imaging plays an important role for development of systems biomedicine, which non-invasively extracts pictorial information on physiological and pathological activities at the cellular and molecular levels. Optical molecular tomography is an emerging area of molecular imaging. It locates and quantifies a 3D molecular probe distribution in vivo from data measured on the external surface of a small animal around the visible and infrared range. This approach can facilitate or enable preclinical applications such as cancer studies, involving angiogenesis, tumor growth, cell motility, met

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9

Leathers, Robert A. "Inverse solution methods for optical oceanography /." Thesis, Connect to this title online; UW restricted, 1998. http://hdl.handle.net/1773/7066.

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10

Ohki, Michio. "Optical Measurement Methods and an Optically Induced Phenomenon in Piezoelectric Transducers." Kyoto University, 1994. http://hdl.handle.net/2433/154660.

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本文データは平成22年度国立国会図書館の学位論文(博士)のデジタル化実施により作成された画像ファイルを基にpdf変換したものである<br>Kyoto University (京都大学)<br>0048<br>新制・課程博士<br>博士(工学)<br>甲第5703号<br>工博第1349号<br>新制||工||945(附属図書館)<br>UT51-94-J135<br>京都大学大学院工学研究科電子工学専攻<br>(主査)教授松重和美, 教授藤田茂夫, 教授小倉久直<br>学位規則第4条第1項該当

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11

Cronkite, Patrick Joseph 1961. "Design methods for focusing grating coupler using holographic optical elements." Thesis, The University of Arizona, 1988. http://hdl.handle.net/10150/276863.

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Light can be coupled out of a waveguide to a focused point by a focusing grating coupler and has possible applications in optical data storage. The grating can be fabricated with either e-beam techniques or holographic techniques. Two design methods are demonstrated that model the focusing grating coupler with holographic optical elements. Both methods take a geometrical optics approach to designing the holographic optical elements and both methods make use of commercially available ray trace programs. The first method uses complicated non-rotationally symmetric construction optics and require

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12

DeVore, Scott Lawrence. "Simulation methods for optical disk drive functions." Diss., The University of Arizona, 1988. http://hdl.handle.net/10150/184474.

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Computer simulations of the optical servo functions of optical disk drives are developed and compared with experimental results. The focus control servo is investigated first, with emphasis on the astigmatic focus detection method. A paraxial ray trace, enhanced to allow tolerance studies of tilted and decentered surfaces, is used to calculate the size and orientation of an astigmatic blur on a quadrant photodetector as a function of focus error. The resulting irradiance distribution is integrated over the detector elements and processed to yield typical focus servo signals. A method for simul

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13

Seelig, Johannes. "Optical methods for nanoscale investigations in biology /." Zürich : ETH, 2006. http://e-collection.ethbib.ethz.ch/show?type=diss&nr=16856.

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14

Català, García Carme. "Optical methods for ultrafast screening of microorganisms." Doctoral thesis, Universitat Rovira i Virgili, 2017. http://hdl.handle.net/10803/450874.

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En aquesta tesi doctoral hem desenvolupat un mètode per la detecció i quantificació múltiple dels microorganismes més comuns que causen infeccions bacterianes amb una velocitat de detecció sense precedents a baix cost i alta sensibilitat. A més a més, fent servir fluids humans reals directament evitant així, els pretractaments tediosos de les mostres. El disseny del sistema està basat en augments d'intensitat del senyal obtingut per espectroscòpia SERS. Això s'aconsegueix utilitzant nanopartícules plasmòniques codificades i funcionalitzades amb elements de reconeixement biològics. D'aquesta m

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15

Budiastra, I. Wayan. "Optical Methods for Quality Evaluation of Fruits." Kyoto University, 1998. http://hdl.handle.net/2433/182429.

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16

Pilát, Zdeněk. "Optical Micromanipulation Techniques Combined with Microspectroscopic Methods." Doctoral thesis, Vysoké učení technické v Brně. Fakulta strojního inženýrství, 2015. http://www.nusl.cz/ntk/nusl-234266.

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Předložená dizertační práce se zabývá kombinací optických mikromanipulací s mikrospektroskopickými metodami. Využili jsme laserovou pinzetu pro transport a třídění živých mikroorganismů, například jednobuněčných řas, či kvasinek. Ramanovskou spektroskopií jsme analyzovali chemické složení jednotlivých buněk a tyto informace jsme využili k automatické selekci buněk s vybranými vlastnostmi. Zkombinovali jsme pulsní amplitudově modulovanou fluorescenční mikrospektroskopii, optické mikromanipulace a jiné techniky ke zmapování stresové odpovědi opticky zachycených buněk při různých časech působení,

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17

Cordobes, Anguilar Francisco. "A theoretical study of optical detection methods for ultracold atoms in optical lattices." Thesis, University of London, 2013. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.603446.

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This thesis presents a theoretical analysis of light scattered from atoms trapped in optical lattices. The work presented here focuses on the case in which atoms trapped in an optical lattice are described by a Hubbard model. It is shown that the scattered light can be used to probe the ground state correlations and excitations of the system. Both scattered intensity and scattered spectrum are shown to contain relevant information. Scattered intensity is shown to carry information about the magnetic ordering and correlation functions in the system. Scattered spectrum sheds light on the excitat

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18

Hansson, Peter. "Surface Characterization using Radiometric and Fourier Optical Methods." Doctoral thesis, Uppsala : Acta Universitatis Upsaliensis : Univ.-bibl. [distributör], 2003. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-3569.

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19

Curry, Cecilia W. "New methods for the computation of optical flow." Diss., Georgia Institute of Technology, 2002. http://hdl.handle.net/1853/20164.

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20

Crowe, John A. "Optical methods for monitoring physiological and biochemical variables." Thesis, University of Oxford, 1986. http://ora.ox.ac.uk/objects/uuid:c364decd-6a47-45d3-aa5b-2a5a013067ff.

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The use of optical methods for performing non-invasive physiological and biochemical monitoring has been investigated, with particular emphasis on the application of near-infrared spectrophotocetry for following changes in the redox state of cytochrome oxidase. Initial studies of the gross optical properties of in vivo tissue were made using an image intensifier. These demonstrated that some light is transmitted through biological tissues and that such material is very highly scattering. In order to investigate the feasibiity of non-invasively monitoring changes in the redox state of cytochrom

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21

Lee, Chung-Yiu. "Operator methods in photorefracticve nonlinear optical wave mixing." Thesis, King's College London (University of London), 2003. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.408284.

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22

Johansson, Eva-Lena. "Optical methods for the study of transparent media." Licentiate thesis, Luleå, 2003. http://urn.kb.se/resolve?urn=urn:nbn:se:ltu:diva-17242.

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In the fields of combustion and fluid mechanics, temperature-, density- and velocity fields are of interest to measure. Optical methods may be used to study transparent media, even transient events. Flames, gases and liquids are examples on transparent media, often called phase objects. Phase objects often have non-uniform refractive index distributions. Variations in density, temperature or pressure affect the refractive index. The phase of the optical wave is affected by the refractive index. Therefore measurement of the phase of the optical wave gives useful information. In this thesis, thr

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23

Wang, Zhiguo. "Mechanical and optical methods for breast cancer imaging." Diss., University of Iowa, 2010. https://ir.uiowa.edu/etd/618.

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It has been recognized that mechanical and optical properties of tissues can be the indicators to identify and characterize breast tumors. The objective of this study is to develop new mechanical and optical modalities for qualification of the elastic and optical properties of normal and cancerous breast tissues. First, a mammography-based elastography (called elasto-mammography) is proposed to generate the elastogram of breast tissues based on conventional X-ray mammography. The displacement information is extracted from mammography projections before and after breast compression. With the in

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24

Rossi, Leonardo <1993&gt. "New Methods for Brillouin Optical Time Domain Analysis." Doctoral thesis, Alma Mater Studiorum - Università di Bologna, 2021. http://amsdottorato.unibo.it/9757/1/rossi_leonardo_tesi.pdf.

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Brillouin optical time domain analysis (BOTDA) is one of the most important distributed optical fiber sensor technologies thanks to its capability of monitoring both temperature and strain distribution over tens of kilometers of sensing fibers with a single interrogator. BOTDA sensors have found important applications in structural health monitoring, safety and environmental engineering. Their employment is still limited by two factors: on one hand, the high complexity (and cost) for a single interrogator unit reduces the applications where BOTDA can compete with classical point-like sensors.

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25

Saro, A., S. Bocquet, J. Mohr, et al. "Optical-SZE scaling relations for DES optically selected clusters within the SPT-SZ Survey." OXFORD UNIV PRESS, 2017. http://hdl.handle.net/10150/624426.

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We study the Sunyaev-Zel'dovich effect (SZE) signature in South Pole Telescope (SPT) data for an ensemble of 719 optically identified galaxy clusters selected from 124.6 deg(2) of the Dark Energy Survey (DES) science verification data, detecting a clear stacked SZE signal down to richness lambda similar to 20. The SZE signature is measured using matched-filtered maps of the 2500 deg(2) SPT-SZ survey at the positions of the DES clusters, and the degeneracy between SZE observable and matched-filter size is broken by adopting as priors SZE and optical mass-observable relations that are either cal

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26

Smartt, Christopher James. "Fourier methods for the analysis of integrated optics devices." Thesis, University of Nottingham, 1995. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.294708.

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27

Thomas, Daniel D. "High resolution optical time domain methods for measuring strain." Thesis, This resource online, 1990. http://scholar.lib.vt.edu/theses/available/etd-03242009-040449/.

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28

Joshi, Amit. "Adaptive finite element methods for fluorescence enhanced optical tomography." Texas A&M University, 2005. http://hdl.handle.net/1969.1/4419.

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Fluorescence enhanced optical tomography is a promising molecular imaging modality which employs a near infrared fluorescent molecule as an imaging agent and time-dependent measurements of fluorescent light propagation and generation. In this dissertation a novel fluorescence tomography algorithm is proposed to reconstruct images of targets contrasted by fluorescence within the tissues from boundary fluorescence emission measurements. An adaptive finite element based reconstruction algorithm for high resolution, fluorescence tomography was developed and validated with non-contact, planewave fr

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29

Farahani, Farnaz. "Comparison of Optical Methods for Fines and Filler Characterization." Thesis, KTH, Skolan för kemivetenskap (CHE), 2015. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-216999.

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This thesis presents an evaluation study of three different image analysis instruments (FiberTester, FiberTester+ and ImageStream) and a laser diffraction (LD) instrument, for the analysis of the fine fraction of a stock. The instruments had different spatial resolutions and measurement ranges. Measurements were made on three different samples; pulp fines, paper filler (precipitated calcium carbonate) and the mix of them. Two comparisons were made; one with only data from image-based analysers, and one where LD data was also included. In the first comparison, the data was area-weighted, while

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30

Wang, Jingyu. "Optical coherence tomography methods using 2-D detector arrays." Thesis, University of Kent, 2012. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.650808.

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Optical coherence tomography (OCT) is a non-invasive, non-contact optical technique that allows cross-section imaging of biological tissues with high spatial resolution, high sensitivity and high dynamic range. Standard OCT uses a focused beam to illuminate a point on the target and detects the signal using a single photodetector. To acquire transverse information, transversal scanning of the illumination point is required. Alternatively, multiple OCT channels can be operated in parallel simultaneously; parallel OCT signals are recorded by a two-dimensional (2D) detector array. This approach i

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31

Kaya, Ilhan. "Mathematical and Computational Methods for Freeform Optical Shape Description." Doctoral diss., University of Central Florida, 2013. http://digital.library.ucf.edu/cdm/ref/collection/ETD/id/5959.

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Slow-servo single-point diamond turning as well as advances in computer controlled small lap polishing enable the fabrication of freeform optics, specifically, optical surfaces for imaging applications that are not rotationally symmetric. Freeform optical elements will have a profound importance in the future of optical technology. Orthogonal polynomials added onto conic sections have been extensively used to describe optical surface shapes. The optical testing industry has chosen to represent the departure of a wavefront under test from a reference sphere in terms of orthogonal ?-polynomials,

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32

Graumann, Jean-Marc. "Intelligent optical methods in image analysis for human detection." Thesis, Brunel University, 2005. http://bura.brunel.ac.uk/handle/2438/7892.

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This thesis introduces the concept of a person recognition system for use on an integrated autonomous surveillance camera. Developed to enable generic surveillance tasks without the need for complex setup procedures nor operator assistance, this is achieved through the novel use of a simple dynamic noise reduction and object detection algorithm requiring no previous knowledge of the installation environment and without any need to train the system to its installation. The combination of this initial processing stage with a novel hybrid neural network structure composed of a SOM mapper and an M

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33

Chu, Beatrice C. B. "Novel optical methods for flowmetering and electric current sensing." Thesis, University of Kent, 1992. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.314488.

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34

Lee, David Shu Chung 1970. "Rheological characterization of LDPE and PMMA with optical methods." Thesis, Massachusetts Institute of Technology, 1988. http://hdl.handle.net/1721.1/9963.

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35

Larsson, Jim. "Evaluation of optical methods for 3D-printing of tissue." Thesis, KTH, Tillämpad fysik, 2020. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-277786.

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36

Garrett, Tracey Lynette. "Optical fiber sensor methods for nondestructive evaluation of bridges." Master's thesis, This resource online, 1995. http://scholar.lib.vt.edu/theses/available/etd-03302010-020536/.

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37

Lane, Dallas W. "Signal processing methods for airborne lidar bathymetry." Title page, table of contents and abstract only, 2001. http://web4.library.adelaide.edu.au/theses/09ENS/09ensl265.pdf.

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"August 2001." Includes bibliographical references (leaves 77-80). Examines the susceptibility of existing signal processing methods to errors and identifies other possible causes of depth error not accounted for by existing signal processing methods, by analysis of the detected laser return waveform data. Methods to improve depth accuracy are investigated.

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38

Wu, Chujun. "Silicon-on-insulator based optical microring resonator sensor and improvement methods." Thesis, The University of Sydney, 2018. http://hdl.handle.net/2123/19894.

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Photonic sensing technologies offer unexceptionable features for taking high requirement measurement in a harsh environment. They inherit advantages such as fast speed and immunity from electromagnetic interference from optical communications. In addition, with the silicon-on-insulator (SOI) technologies, chip scale optical sensors are capable of providing high sensitivity with an ultra-compact form factor. The motivation is derived from the high demand for sensors in the new era of the Data Age and the great potential of fast response, highly sensitive and ultra-compact photonic sensor. Furth

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39

柯俊達 and Chun-tat Or. "Optical characterization of defects in GaN." Thesis, The University of Hong Kong (Pokfulam, Hong Kong), 2001. http://hub.hku.hk/bib/B31226607.

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40

García, Algar Manuel. "Optical methods and nano/microsystems for cancer diagnosis and therapy." Doctoral thesis, Universitat Rovira i Virgili, 2018. http://hdl.handle.net/10803/586091.

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Aquesta tesi es focalitza en el desenvolupament de nous mètodes per a la recerca en el diagnòstic i teràpia contra el càncer. Els fluds biològics de pacients suposen una font de material cancerígen que pot revel·lar informació sobre l'estat de progressió de la malaltia, si els analitzem amb enfocs de biòpsia líquida. Por altra banda, les propietats fisicoquímiques d'aquest material circulant, ja siguin cèl·lules tumorals senceres CTCs, ens poden ajudar a disenyar sistemes tant per a la seva detecció com per al tractament. L' ús de tècniques espectroscòpiques de fluorescència o basades en SERS

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41

Ercis, Firat. "Comparison Of Histograms Of Oriented Optical Flowbased Action Recogniton Methods." Master's thesis, METU, 2012. http://etd.lib.metu.edu.tr/upload/12615060/index.pdf.

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In the task of human action recognition in uncontrolled video, motion features are used widely in order to achieve subject and appearence invariance. We implemented 3 Histograms of Oriented Optical Flow based method which have a common motion feature extraction phase. We compute an optical flow field over each frame of the video. Then those flow vectors are histogrammed due to angle values to represent each frame with a histogram. In order to capture local motions, The bounding box of the subject is divided into grids and the angle histograms of all grids are concetanated to obtain the final m

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42

Veksler, Boris. "Low coherence optical methods for express noninvasive bio-medical diagnostics." Thesis, Cranfield University, 2010. http://dspace.lib.cranfield.ac.uk/handle/1826/4500.

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Coherence is the fundamental property of optical radiation. Methods based on this characteristic are employed in different areas of research even in NASA and European space agency. However, coherence properties of light can be successfully applied in life sciences for the purposes of diagnostics and treatment. The subject of current research is the development and improvement of the quantitative performance of non-invasive low coherence optical diagnostic which is a novel modern biomedical technique uniquely suited for the measurements of particles distribution within the topical layers of bio

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43

Larusson, Fridrik. "Shape-based image reconstruction methods for hyperspectral diffuse optical tomography." Thesis, Tufts University, 2013. http://pqdtopen.proquest.com/#viewpdf?dispub=3557529.

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<p> Diffuse optical tomography (DOT) is an optical imaging modality that uses near infrared light to recover functional information of tissue. In this thesis we focus on breast imaging where estimation of the optical properties of the breast can assist in detecting cancerous tumors and in judging overall breast health. </p><p> To this end we explore the application of a parametric level set method (PaLS) for image reconstruction for hyperspectral DOT. Chromophore concentrations and diffusion amplitude are recovered using a linearized Born approximation model and employing data from over 100

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44

Krishnan, Anand. "Laser and optical based methods for detecting and characterising microorganisms." Thesis, University of Glasgow, 2008. http://theses.gla.ac.uk/436/.

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This work investigated novel optical methods of characterizing the activity of microorganisms. Two different systems are studied in detail in this work. The possibility of using line scan speckle systems and imaging systems to understand the microbial behaviour, growth and motility was investigated. Conventionally, the growth and viability of microorganisms are determined by swabbing, plating and incubation, typically at 37degreesC for at least 24 hours. The proposed system allows real-time quantification of morphology and population changes of the microorganisms. An important aspect of the li

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45

Masoudi, Husain Muhammad Y. "Parallel numerical methods for analysing optical devices with the BPM." Thesis, University of Glasgow, 1995. http://theses.gla.ac.uk/2858/.

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In this work, some developments in the theory of modelling integrated optical devices are discussed. The theory of the Beam Propagation Method (BPM) to analyse longitudinal optical waveguides is established. The BPM is then formulated and implemented numerically to study both two and three-dimensional optical waveguides using several Finite-Difference (FD) techniques. For the 2-D analysis, comparisons between the performance of the implicit Crank Nicholson (CN), the explicit Real Space (RS) and the Explicit Finite-Difference (EFD) are made through systematic tests on slab waveguide geometries.

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46

Smith, Ann M. "Optical and related methods of chemical sensing using substituted phthalocyanines." Thesis, University of Kent, 1996. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.319229.

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47

Zhang, Jian. "Nonlinear methods for distributed sensing in high birefringence optical fibres." Thesis, King's College London (University of London), 1998. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.300417.

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48

Miller, Helen. "Novel super-resolution optical microscopy methods for single-molecule biophysics." Thesis, University of York, 2017. http://etheses.whiterose.ac.uk/18192/.

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Super-resolution microscopy is a relatively new and rapidly growing field. Development has been largely technology-driven, with high power lasers, higher resolution CCD cameras, and increasing computing power all enabling new biological questions to be explored. Single-molecule imaging is the tool of choice for studying systems where heterogeneity is present; ensemble methods can average away the interesting behaviour and lead to false conclusions. This thesis develops and optimises bespoke fluorescence microscopy for application to three biological questions, each pushing a limit of super-res

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Elisee, J. P. "Innovative boundary integral and hybrid methods for diffuse optical imaging." Thesis, University College London (University of London), 2011. http://discovery.ucl.ac.uk/1324528/.

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Diffuse Optical Imaging (DOI), the study of the propagation of Near Infra-Red (NIR) light in biological media, is an emerging method in medical imaging. Its state-of-the-art is non-invasive, versatile and reasonably inexpensive. In Diffuse Optical Tomography (DOT), the adaptation of numerical methods such as the Finite Element Method (FEM) and, more recently the Boundary Element Method (BEM), has allowed the treatment of complex problems, even for in vivo functional three-dimensional imaging. This work is the first attempt to combine these two methods in DOT. The BEM-FEM is designed to tackle

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50

Hughes, David Allan. "Optical and ultrasonic methods for the detection of dental disease." Thesis, University of Strathclyde, 2011. http://oleg.lib.strath.ac.uk:80/R/?func=dbin-jump-full&object_id=16771.

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