Relevant bibliographies by topics / Optical measurements / Dissertations / Theses
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Dissertations / Theses on the topic 'Optical measurements'

Author: Grafiati
Published: 4 June 2021
Last updated: 26 July 2025

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1

McDonald, Alison. "Measurements in optical microscopy." Thesis, University of Strathclyde, 2012. http://oleg.lib.strath.ac.uk:80/R/?func=dbin-jump-full&object_id=19082.

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Optical microscopy is a powerful technique that allows visualisation of structures that are invisible with the naked eye. With innovations in computer technology, detectors, optics and photochemistry, the field of microscopy has developed significantly in recent years with highly sophisticated systems commercially available as a matter of routine. With the advent of new microscopes new challenges arise, particularly in the quantification of data so that the end-user may better understand the images obtained. For accurate quantification, the microscope has to be accurately aligned and calibrate
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2

LOSERO, ELENA. "Quantum enhanced optical measurements." Doctoral thesis, Politecnico di Torino, 2020. http://hdl.handle.net/11583/2841168.

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3

Pretorius, Shaun. "Development of flexible automotive measurement adaptors for the PQ25 VWSA platform." Thesis, Nelson Mandela Metropolitan University, 2009. http://hdl.handle.net/10948/1632.

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The following work describes all knowledge required in the creation of new automotive optical Photogrammetrical adaptors, which allow the user thereof to measure a fully assembled vehicle in its natural position, i.e. on its wheels for the PQ25 platform at Volkswagen of South Africa. The system is the only method available to the manufacturing plant to measure a fully assembled vehicle in this manner. The FlexMess system allows for a quick portable measurement of a vehicle at all stages of Vehicle manufacturing, aligned via the Volkswagen RPS standards. In the first part of the work, the probl
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4

Lee, Dicky. "Optical parametric oscillators and precision optical frequency measurements." Thesis, Massachusetts Institute of Technology, 1996. http://hdl.handle.net/1721.1/38369.

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5

Sidik, Madihah Binti Jafar. "Optical measurements of suspended sediments." Thesis, Bangor University, 2016. https://research.bangor.ac.uk/portal/en/theses/optical-measurements-of-suspended-sediments(e93593ab-41cf-4039-ac87-2fdcffd15a10).html.

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Sunlight in the ocean water is important for primary productivity, however, in coastal seas, suspended sediments (SPM) limit the availability of sunlight. The suspended sediments scatter and absorb light. Some of the scattered light travel back (backscattered light) to space and can be used in remote sensing of suspended sediments. The absorption of light by suspended particles gives coastal seas their characteristic green colour (suspended sediments in coastal water absorb blue light and only green light of the visible spectrum left in the water column). In this thesis, we evaluate two very d
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6

George, Sebastian. "Optical and Magneto-Optical Measurements of Plasmonic Magnetic Nanostructures." Thesis, Uppsala universitet, Materialfysik, 2014. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-229511.

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At the interface between a metal and dielectric, it is possible for an electromagnetic wave to couple with the conduction electrons of the metal to create a coupled oscillation known as a surface plasmon. These surface plasmons can exhibit properties which are not shared with their purely electronic or electromagnetic components. Such unique properties include the ability to transmit plasmonic waves through sub-wavelength spaces, opening up the possibility of combining the high data density seen in photonics-based information technologies with the nanometer-scale electronic components of moder
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7

Li, Yiling. "Optical Measurements of Rolling Friction Coefficients." Licentiate thesis, Luleå tekniska universitet, Institutionen för teknikvetenskap och matematik, 2016. http://urn.kb.se/resolve?urn=urn:nbn:se:ltu:diva-142.

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This thesis presents an optical method to measure the rolling friction coefficientsfor balls rolling freely on a cylindrical surface. Two different models of a ball rollingfreely on a cylindrical surface are established, one is an analytical model and the otheris a numerical model derived from Lagrange equation. The rolling friction coefficientsare evaluated from the position data of the steel balls. The positions data are retrievedfrom images recorded by a high-speed camera. The locating algorithms includingbackground subtraction and ball recognition are presented in detail. The rollingfricti
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8

Tibaldi, Pier Silvio TIbaldi. "Flexible Time-Resolved Magneto-Optical Measurements." Thesis, Uppsala universitet, Materialfysik, 2016. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-304296.

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We present a time-resolved Kerr microscope, capable of measuring the magnetization dynamics of samples grown on transparent, double-side-polished substrates.The magnetization is excited by a current pulse, using a coplanar waveguide placed beneath the samples. The Kerr rotation is detected with the stroboscopic pump-probe technique, using a probing laser, synchronized with the current pulse.We report benchmark measurements of the time-resolved Kerr instrument for magnetization dynamics in thin permalloy and FePd films. The experimental results for ferromagnetic resonance peaks have been compar
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9

Pilling, Neil Anthony. "Optical fibre measurements in power systems." Thesis, University of Liverpool, 1992. https://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.282738.

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10

Faber, Dirk Johannes. "Functional optical coherence tomography spatially resolved measurements of optical properties /." [S.l. : Amsterdam : s.n.] ; Universiteit van Amsterdam [Host], 2005. http://dare.uva.nl/document/88794.

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11

Tuten, William Scott. "Anterior Segment Optical Coherence Tomography-Based Phakometry Measurements in Children." The Ohio State University, 2009. http://rave.ohiolink.edu/etdc/view?acc_num=osu1243629782.

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12

Rao, S. Madhusudana. "Optical Metrology:Techniques For The Measurement Of Optical Parameters." Thesis, Indian Institute of Science, 2000. https://etd.iisc.ac.in/handle/2005/204.

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The work reported in this thesis has been carried out in the following two areas of Optical metrology: 1. Measurement and correction of prism angles 2. Measurement of refractive indices using a spectrograph. The prism angles are conventionally tested by mechanical bevel protractors, autocol-limators (angle dekkors), simple interference techniques and interferometers. All these methods have their own limitations either in accuracy or in terms of cost. Mechanical methods are usually employed to measure the angles of prisms. Interference techniques and interferometers are also used b
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13

Rao, S. Madhusudana. "Optical Metrology:Techniques For The Measurement Of Optical Parameters." Thesis, Indian Institute of Science, 2000. http://hdl.handle.net/2005/204.

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The work reported in this thesis has been carried out in the following two areas of Optical metrology: 1. Measurement and correction of prism angles 2. Measurement of refractive indices using a spectrograph. The prism angles are conventionally tested by mechanical bevel protractors, autocol-limators (angle dekkors), simple interference techniques and interferometers. All these methods have their own limitations either in accuracy or in terms of cost. Mechanical methods are usually employed to measure the angles of prisms. Interference techniques and interferometers are also used but they n
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14

Arzt, Steffi. "Measurements of optical activity and absolute optical chirality in birefringent crystals." Thesis, University of Oxford, 1995. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.282424.

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15

Ji, Zheng. "The Use of Optical Metrology in Active Positioning of a Lens." Thesis, University of North Texas, 2014. https://digital.library.unt.edu/ark:/67531/metadc699892/.

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Precisely positioned optical lenses are currently required for many highly repetitive mechanics and applications. Thus the need for micron-scale repetition between opto-mechanical units is evident, especially in industrial manufacturing and medical breakthroughs. In this thesis, a novel optical metrology system is proposed, designed, and built whose purpose is to precisely locate the center of a mechanical fixture and then to assemble a plano-convex optical lens into the located position of the fixture. Center location specifications up to ±3 µm decenter and ±0.001° tilting accuracy are requir
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16

Larsson, Olof. "Visual-inertial tracking using Optical Flow measurements." Thesis, Linköping University, Automatic Control, 2010. http://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-59970.

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<p> </p><p>Visual-inertial tracking is a well known technique to track a combination of a camera and an inertial measurement unit (IMU). An issue with the straight-forward approach is the need of known 3D points. To by-pass this, 2D information can be used without recovering depth to estimate the position and orientation (pose) of the camera. This Master's thesis investigates the feasibility of using Optical Flow (OF) measurements and indicates the benifits using this approach.</p><p>The 2D information is added using OF measurements. OF describes the visual flow of interest points in the image
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17

Kinell, Lars. "Optical shape measurements using temporal phase unwrapping /." Luleå, 2003. http://epubl.luth.se/1402-1544/2003/31/index.html.

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18

Wilson, Laurence. "Optical force measurements in concentrated colloidal suspensions." Thesis, University of Edinburgh, 2007. http://hdl.handle.net/1842/3220.

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This work concerns the construction and testing of an optical tweezers-based force transducer, and its application to a hard-sphere colloidal system. A particle in an optical trap forward-scatters a fraction of the trapping light, which is collected in order to give high-resolution information on the trapped particle’s position relative to the trap centre. The system is then calibrated to convert particle displacements to forces. The colloid used in this study is a density- and refractive index-matched suspension of PMMA particles, radius 860 ± 70nm, with volume fractions in the range φ = 40 →
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19

Li, Ziyuan. "Optical supercavity and precision ring laser measurements." Thesis, University of Canterbury. Physics and Astronomy, 1993. http://hdl.handle.net/10092/5532.

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A variety of discoveries, inventions and new experimental and theoretical results characteristic of high-precision devices are discussed in connection with the Canterbury ring laser and with optical supercavities in general. Cavity losses of a few ppm define one fundamental limit for precision measurements. We report a ringing phenomenon in the responses both of the Canterbury ring cavity and of commercial (Newport SR-130) supercavities under excitation by an external laser, whenever the laser frequency and the cavity resonance cross in time. The temporal waveform or ringing profile for any
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20

Zanetta, Paolo M. "Optical techniques applied to measurements in art." Thesis, Loughborough University, 1994. https://dspace.lboro.ac.uk/2134/26906.

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Optical diagnostic techniques are particularly attractive for the non-destructive detection of incipient damage and the evaluation of the state of surface decay. Non-contact, high precision measurements of the shape and deformation of an artifact can be performed using laser methods based on holographic and speckle interferometry.
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21

Fosuhene, Samuel Kofi. "Single-end reflectometric measurements of polarization-mode dispersion in single-mode optical fibres." Thesis, Nelson Mandela Metropolitan University, 2013. http://hdl.handle.net/10948/6280.

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In this thesis two novel single-end methods are applied to measure and characterize polarization mode dispersion in single mode optical fibres. Polarization mode dispersion (PMD) is an important factor negatively affecting the successful implementation of high speed long haul optical fibre networks operating at bit rates of 10Gb/s and above. PMD measurements are thus important for quality control during manufacturing and cabling processes. It is also useful for network operators planning to upgrade bitrates in existing networks to 10Gb/s and beyond. In an optical fibre link, sections with part
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22

Su, Peng. "Absolute Measurements of Large Mirrors." Diss., The University of Arizona, 2008. http://hdl.handle.net/10150/194868.

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The ability to produce mirrors for large astronomical telescopes is limited by the accuracy of the systems used to test the surfaces of such mirrors. Typically the mirror surfaces are measured by comparing their actual shapes to a precision master, which may be created using combinations of mirrors, lenses, and holograms. The work presented here develops several optical testing techniques that do not rely on a large or expensive precision, master reference surface. In a sense these techniques provide absolute optical testing.The Giant Magellan Telescope (GMT) has been designed with a 350 m2
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23

Gaete-Martinez, Victor. "Optical Measurement of Strang Geometry and Orientation and Their Influence on Oriented Strand Composite Formation Quality." Fogler Library, University of Maine, 2009. http://www.library.umaine.edu/theses/theses.asp?highlight=1&Cmd=abstract&ID=FTY2009-004.

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24

Wang, Xinchi. "Separate adjustment of close range photogrammetric measurements." Thesis, City University London, 1998. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.264245.

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25

Woodall, Milton Andrew. "Nonlinear Absorption Techniques and Measurements in Semiconductors." Thesis, North Texas State University, 1985. https://digital.library.unt.edu/ark:/67531/metadc331299/.

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We have conducted a detailed experimental and theoretical study of nonlinear absorption in semiconductors. Experimental measurements were made on a variety of materials at wavelengths of 1.06 and 0.53 microns using a picosecond Nd:YAG laser. Both two- and three-photon processes were investigated. Values of nonlinear absorption coefficients extracted from these measurements show excellent agreement with recent theory and scaling rules. Our theoretical investigation has been carried out for two-, three-,and n-photon absorption, for both continuous and pulsed sources. Expressions are obtained fo
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26

Li, Yong. "A high speed optical surface coordinate measurement system and its applications to dynamic measurements." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 2000. http://www.collectionscanada.ca/obj/s4/f2/dsk1/tape4/PQDD_0029/NQ64605.pdf.

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27

Li, Yong 1965 May 3. "A high speed optical surface coordinate measurement system and its applications to dynamic measurements /." Thesis, McGill University, 2000. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=36639.

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Currently there is no standard whole-field methodology to measure the transient out-of-plane deformation of a surface under dynamic events. In this work, a whole-field high-speed optical surface measurement system has been developed, which yields absolute Cartesian coordinates (xyz) as measurement results. A high-speed digital camera coupled with the grating projection and Fourier transform is used to measure 3D surface deformations with the maximum sampling rate up to 1000 Hz and the exposure time of each frame up to 50 musec. A calibration technique has been utilized to convert the direct me
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28

Johansen, Remi Andre Ursin. "Measurements of Optical Penetration Depth in Smoked Salmon." Thesis, Norwegian University of Science and Technology, Department of Electronics and Telecommunications, 2008. http://urn.kb.se/resolve?urn=urn:nbn:no:ntnu:diva-8940.

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<p>Optical spectroscopy is a common method used in the determination of quality parameters in groceries. An optical characterization of smoked Atlantic salmon was carried out in this thesis. The optical penetration depth in salmon was found at 531 nm and 632 nm from measurements with lasers as light sources, and from 550 nm to 880 nm with a tungsten halogen lamp as light source. The spectrum of the halogen lamp combined with the absorption spectrum of the salmon made it difficult to obtain results for wavelengths below 550 nm with the halogen lamp. Two variations in the measurements on smoked
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29

Fabritius, T. (Tapio). "Optical method for liquid sorption measurements in paper." Doctoral thesis, University of Oulu, 2007. http://urn.fi/urn:isbn:9789514284045.

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Abstract This thesis presents an effective optical method for measuring liquid sorption into paper. From the two tested methods, based on a streak-camera and optical coherence tomography (OCT), the last-mentioned proved very promising for investigating dynamical paper-liquid interactions as spatially and temporally dependent processes. The streak-camera measurements were performed to explore the relationship between paper properties and light migration in dry and refractive index matched paper in general. Based on streak-camera measurements, a novel procedure for determining the average refra
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30

Jesuthasan, Nirmalakanth. "Optical measurements of a free-surface granular flow." Thesis, McGill University, 2005. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=83869.

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The experimental investigation described in this thesis is primarily aimed at acquiring digital particle-tracking velocimetry (DPTV) measurements of a free-surface granular flow down the upper inclined surface of a wedge-shaped static pile of the same material, contained in a narrow channel between two parallel vertical glass plates. The glass plates are 610 mm long and 350 mm high. Three different values of the normal separation distance between them were investigated: 25.4 mm, 38.1 mm, and 50.8 mm. For each of these separation distances, the following three values (nominal) of the mas
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31

Long, William F. (William Frank) 1971. "Optical tomography by time-resolved diffuse reflectance measurements." Thesis, McGill University, 2000. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=37618.

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The understanding of the interaction of light with a scattering/absorbing medium provides a foundation needed for developing many applications in diagnostic medicine and industry. The objective of this research was to obtain quantitative depth-resolved information about absorbing constituents in a scattering medium.<br>Initially, the project focussed on quantification in samples where scattering and absorber concentration were variable. Using time resolved reflectance measurements, a series of statistical descriptors of the photon time distributions were calculated. Stepwise multilinear regres
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32

Koch, Frank. "Linear and non-linear measurements in optical fibres." Thesis, Imperial College London, 2002. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.399244.

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33

Vaucher, Gail M. Tirrell. "Correlation of atmospheric optical turbulence and meteorological measurements." Thesis, Monterey, California. Naval Postgraduate School, 1989. http://hdl.handle.net/10945/25793.

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34

Stewart, James Neil. "Application of optical techniques to moving surface measurements." Thesis, Heriot-Watt University, 1990. http://hdl.handle.net/10399/891.

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35

Hamer, Matthew David. "Design of Optical Measurements for Electrothermal Plasma Discharges." Thesis, Virginia Tech, 2014. http://hdl.handle.net/10919/49101.

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Ablation controlled electrothermal (ET) plasma discharge devices consist of a small diameter capillary through which a large amount of energy is discharged. The high energy in the discharge ablates an inner sleeve material, ionizes the material, and a high energy-density plasma jet accelerates out the open end. ET devices can find applications in internal combustion engines, Tokamak fusion fueling and stabilization, hypervelocity launchers, and propulsion. The ballistic properties of an ET device are highly dependent on the propellant and ablated material. A useful noninvasive technique to cha
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36

Shumway, LeGrand Jared. "High-Voltage Measurements Using Slab-Coupled Optical Sensors." BYU ScholarsArchive, 2017. https://scholarsarchive.byu.edu/etd/6499.

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This work highlights slab coupled optical sensors (SCOS) and their ability to measure high voltages. Although other high voltage measurement techniques exist, most of these techniques are electrical devices and are therefore more susceptible to stray ground currents and other electromagnetic interferences (EMI), which may cause signal distortion. Optical sensors are less susceptible to such interferences and these sensors, such as the Pockels cell, have been used in measuring high voltage. SCOS offer an alternative method of measuring high voltage optically. Consisting of an optical fiber and
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37

Holm, Anders. "Optical diffraction tomography an experimental method for ultrasound measurements /." Lund : Dept. of Electrical Measurements, Lund Institute of Technology, 1993. http://books.google.com/books?id=PIhqAAAAMAAJ.

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38

Pomfret, Stephen J. "Electroabsorption measurements of conjugated organic materials." Thesis, Durham University, 1995. http://etheses.dur.ac.uk/5473/.

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This thesis reports the results of electroabsorption measurements undertaken on three materials that are all, to some degree, conjugated: polymeric and oligomeric emeraldine base, and polysquaraine. The aim of these experiments has been to investigate the nature of the optical excitations occuring within the materials. Electroabsorption (EA) spectroscopy involves the measurement of the change in absorption coefficient of a material with the application of an external field. The fields required are high and the resulting signals small, hence to perform such experiments a dedicated spectrometer
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39

Souther, Nathan Jon. "Light Shift Measurements of Cold Rubidium Atoms using Raman Pump-Probe Spectroscopy." Miami University / OhioLINK, 2009. http://rave.ohiolink.edu/etdc/view?acc_num=miami1250622906.

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40

Robinson, Dirk J. "Optically relayed push-pull velocity interferometry resolved in time and position." Online access for everyone, 2005. http://www.dissertations.wsu.edu/Thesis/Spring2005/d%5Frobinson%5F050605.pdf.

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41

Kim, Dug Young. "Interferometric measurements of nonlinear optical properties for all optical switching applications in dielectric waveguides." Diss., The University of Arizona, 1994. http://hdl.handle.net/10150/186968.

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The successful implementation of nonlinear devices, for example for all-optical switching, depends critically on the availability of appropriate nonlinear optical materials. Most of the currently used methods to measure optical nonlinearities of materials are either indirect or inadequate for separating the fast electronic effects from slow thermo-optic processes. The motivation of this Ph.D. research was to develop a direct and accurate measurement method to evaluate the nonlinear optical properties of various, recently available waveguide materials for all-optical switching applications. A p
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42

Schmidt, James E. "Vibration measurements on the Phalanx electro-optical stabilization system." Thesis, Monterey, Calif. : Springfield, Va. : Naval Postgraduate School ; Available from National Technical Information Service, 1996. http://handle.dtic.mil/100.2/ADA322212.

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Thesis (M.S. in Engineering Acoustics) Naval Postgraduate School, September 1996.<br>"September 1996." Thesis advisor(s): Steven R. Baker. Includes bibliographical references (p. 141). Also Available online.
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43

Du, Chunzi. "Autonomous optical measurements in Bayboro Harbor (Saint Petersburg, Florida)." [Tampa, Fla.] : University of South Florida, 2005. http://purl.fcla.edu/fcla/etd/SFE0001384.

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44

Åldstedt, Mats Marhaug. "Optical Measurements of Picovibrations on Capacitive Micromachined Ultrasonic Transducers." Thesis, Norwegian University of Science and Technology, Department of Electronics and Telecommunications, 2010. http://urn.kb.se/resolve?urn=urn:nbn:no:ntnu:diva-10169.

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<p>A research group at the Norwegian University of Science and Technology plan to integrate Capacitive Micromachined Ultrasonic Transducers (CMUTs) in a probe which can be used to image human blood vessels from the inside. With CMUT technology still being in its youth, it is important to characterize different CMUT prototypes to learn which design is best suited for the probe. In this thesis, a network analyzer and a heterodyne interferometer are used to characterize two prototypes, both electrically and optically. The heterodyne interferometer was proven to be extremely sensitive and thus
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45

Moroney, David T. "Use of an optical multichannel analyzer for reflectivity measurements." Thesis, Monterey, California. Naval Postgraduate School, 1992. http://hdl.handle.net/10945/24091.

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46

Charalambous, Ismini. "Distortion, randomness and quantitative measurements using optical coherence tomography." Thesis, University of Kent, 2006. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.443780.

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47

Enache, Mugurel Catalin. "Numerical modelling and optical measurements for pulsed power systems." Thesis, Loughborough University, 1999. https://dspace.lboro.ac.uk/2134/33116.

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This thesis illustrates a typical situation in which theoretical considerations and predictions are used to enhance the value of an experimental investigation. The body of the thesis is in two main parts, the first of which considers the two-dimensional modelling of representative pulsed-power systems while the second describes a number of valuable experimental tools that were developed for use in investigating the experimental behaviour of such systems.
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48

Vidrighin, Mihai-Dorian. "Quantum optical measurements for practical estimation and information thermodynamics." Thesis, Imperial College London, 2017. http://hdl.handle.net/10044/1/45048.

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The implementation of optical quantum technologies requires precise and complete characterisation tools for multi-mode nonclassical states of light. In this thesis, we propose and we implement experimentally three applications of optical quantum measurements, which combine aspects of light that are described by both discrete and continuous variables. In the rst part of this thesis, we present a new scheme for interferometric phase estimation, which uses double homodyne measurements as an alternative to photon counting. We show that, without requiring a phase reference, this scheme can achieve
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49

Jacobson, Carl P. "Temperature corrected strain measurements using optical time domain reflectometry." Thesis, Virginia Tech, 1990. http://hdl.handle.net/10919/41906.

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<p>A method of using optical fiber to measure strain and correct for the effects of temperature is proposed. A means of measuring apparent strain is given, pure temperature is measured using Fresnel-backscatter based Optical Time Domain Reflectametry, and a method for combining the two measurements to obtain a measurement of mechanically-induced strain alone is developed. The background, theory and experimental results that demonstrate the feasibility of such a system are presented and the results are compared with the performance of existing fiber-based means of measuring temperature. Experim
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Shirsekar, Deepali. "Bidirectional Reflectance Measurements of Low-Reflectivity Optical Coating Z302." Thesis, Virginia Tech, 2019. http://hdl.handle.net/10919/87467.

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Black coatings essentially absorb incident light at all wavelengths from all directions. They are used when minimal reflection or maximum absorption is desired and therefore are effective in applications that require control of stray light. Our motivation stems from the use of black coating Lord Aeroglaze® Z302 in aerospace and remote sensing applications and the desire to support the development of bidirectional spectral models that can be used successfully to predict the performance of optical instruments such as telescopes. The bidirectional reflectance distribution function (BRDF) is an in
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