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Dissertations / Theses on the topic 'Optical Instrument'

Author: Grafiati

Published: 4 June 2021

Last updated: 25 July 2025

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1

Patti, Mauro <1989&gt. "MAORY: wavefront sensor prototype and instrument optical design." Doctoral thesis, Alma Mater Studiorum - Università di Bologna, 2018. http://amsdottorato.unibo.it/8534/1/Mauro_Patti.pdf.

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MAORY will be the multi-conjugate adaptive optics module for the ELT first light. Its main goal is to feed the high-resolution NIR imager and spectrograph MICADO. The present Thesis address the MAORY system at the level of optical design and analysis. MAORY is a complex science projects whose stakeholder is the scientific community. Its requirements are driven by the science cases which request high resolution and astrometric accuracy. In an ideal world without atmospheric turbulence, MAORY optics must deliver diffraction-limited images with very low optical distortions. The tolerance pro

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2

Hoffman, David Swick. "Two wavelength Lidar instrument for atmospheric aerosol study." Thesis, Montana State University, 2008. http://etd.lib.montana.edu/etd/2008/hoffman/HoffmanD0508.pdf.

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A two-color lidar instrument and inversion algorithms have been developed for the study of atmospheric aerosols. The two-color lidar laser transmitter is based on the collinear fundamental 1064 nm and second harmonic 532 nm output of a Nd:YAG laser. Scattered light is collected by the two-color lidar receiver using a Schmidt-Cassegrain telescope with the 532 nm channel monitored using a gated photomultiplier tube (PMT) and the 1064 nm channel monitored using an avalanche photodiode (APD). Data is collected from the PMT and APD using a 14 bit 200 MHz data acquisition card. The lidar inversion a

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3

Lu, Chen David. "High speed handheld instrument for ophthalmic optical coherence tomography." Thesis, Massachusetts Institute of Technology, 2013. http://hdl.handle.net/1721.1/79233.

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Thesis (S.M.)--Massachusetts Institute of Technology, Dept. of Electrical Engineering and Computer Science, 2013.<br>Cataloged from PDF version of thesis.<br>Includes bibliographical references.<br>Optical coherence tomography (OCT) is a non-contact, high resolution biomedical imaging technique that uses low coherence interferometry to generate cross-sectional images of tissue. OCT has become a standard tool in ophthalmology for imaging the retina to detect or monitor pathologies. Recent research advances in swept source lasers have allowed swept source OCT (SS-OCT) to have 5-50x faster imagin

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4

Bührer, Maximilian. "Simulation of Optical Aberrations for Comet Interceptor’s OPIC Instrument." Thesis, Luleå tekniska universitet, Rymdteknik, 2020. http://urn.kb.se/resolve?urn=urn:nbn:se:ltu:diva-81638.

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In space exploration optical imaging is one of the key measurements conducted, with a vast majority of missions heavily relying on optical data acquisition to examine alien worlds. One such endeavor is ESA’s F-class mission Comet Interceptor, a multi-element spacecraft expected to be launched in 2028. It consists of a primary platform and two sub-spacecraft, one of which carrying the Optical Periscopic Imager for Comets (OPIC). An accurate prediction of the generated imagery is of undeniable importance as mission planning and instrument design strongly depend on the real-world output quality o

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5

Wang, Haobing. "Optical Fibre Characterisation for the new-generation instrument - Hector." Thesis, The University of Sydney, 2022. https://hdl.handle.net/2123/29988.

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Australia has been the world leader in astrophotonic developments, led by the SAIL/Astralis-USyd labs at The University of Sydney. A new, novel optical fibre imaging device, called a ‘Hexabundle’ was invented by a team in the SAIL/Astralis-USyd labs and was implemented in an integral field spectrograph instrument called ‘SAMI’ on the Anglo-Australian Telescope (AAT). Based on the success of SAMI, an innovative new $7m instrument called Hector has now been built and is currently being commissioned on the AAT. Hector has new upgraded hexabundles, positioners and spectrographs. It will now tackle

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6

Larsson, Marcus. "Influence of optical properties on Laser Doppler Flowmetry /." Linköping : Univ, 2004. http://www.bibl.liu.se/liupubl/disp/disp2004/tek914s.pdf.

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7

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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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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9

Kamath, Srijit. "Leaf sequencing algorithms for segmented multileaf collimation." [Gainesville, Fla.] : University of Florida, 2002. http://purl.fcla.edu/fcla/etd/UFE1001155.

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10

Kamath, Srijit. "Algorithms for sequencing multileaf collimators." [Gainesville, Fla.] : University of Florida, 2005. http://purl.fcla.edu/fcla/etd/UFE0011548.

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11

Jeffcoat, Ron D. "Design of gamma ray collimators for nondestructive assay." Thesis, Georgia Institute of Technology, 1999. http://hdl.handle.net/1853/16663.

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12

Jaturunruangsri, Supaporn. "Evaluation of material surface profiling methods : contact versus non-contact." Thesis, Brunel University, 2015. http://bura.brunel.ac.uk/handle/2438/10431.

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Accurate determination of surface texture is essential for the manufacturing of mechanical components within design specifications in engineering and materials science disciplines. It is also required for any subsequent modifications to physical properties and functional aspects of the object. A number of methods are available to characterize any surface through the measurement of roughness parameters that can then be used to describe surface texture. These methods may be divided into those in that direct contact is made with the surface and those where such contact is not required. This repor

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13

Abou-Dagga, Sanaa Ibrahim. "Factors related to the adoption of a two-way interactive distance education technology instrument development, instrument validation, and causal model testing /." Full text available, 1995. http://images.lib.monash.edu.au/ts/theses/aboudagga.pdf.

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14

Williamson, Ricky Lawrence. "Near-field optical and shear force microscopy : instrument development, theoretical background and applications." Thesis, University of Bristol, 1995. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.296690.

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15

Maximino, Fabio Lombardi. "Caracterização de plasmons de superfície em filmes de metais nobres através de tunelamento ótico." Universidade de São Paulo, 2011. http://www.teses.usp.br/teses/disponiveis/43/43134/tde-15052012-154158/.

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Os metais nobres são admirados desde as culturas mais antigas por sua capacidade de refletir a luz. Com os desenvolvimentos na área da nanotecnologia se pode entender um pouco mais sobre a interação entre a luz e estes metais. Devido a esta interação foi criada a Plasmônica e a partir dela começaram os estudos acerca dos plasmons de superfície (SP). Estes estudos vêm gerando inúmeros desenvolvimentos nas pesquisas de gravação magneto-ótica, microscopia, detectores moleculares biológicos entre outras. Como os SPs são ondas evanescentes, eles precisam ser observados em campo próximo. Com o intui

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Pugh, Alan James. "An optical displacement monitor for the measurement of low frequency vibrations." Thesis, University of Exeter, 1990. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.335511.

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17

Lee, David. "New techniques in astronomical spectroscopy for 8-m telescopes." Thesis, Durham University, 1998. http://etheses.dur.ac.uk/4847/.

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The purpose of this thesis is to investigate new instrument technology to enhance the capabilities of 8-m telescopes. This thesis first describes the theory, design, construction, and testing of an immersed grating. Immersed gratings can be used to provide R≥ 10(^4) with a multi-object and/or integral field spectrograph on an 8-m telescope. Immersed gratings allow high resolution to be achieved whilst maintaining the required pupil size at a level similar to that on 4-m telescopes. This thesis describes laboratory tests which verify that immersed gratings provide high resolution. The throughpu

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18

Neve, de Mevergnies Nathalie. "The MicroPIVOT : an Integrated Particle Image Velocimeter and Optical Tweezers Instrument for Microscale Investigations." PDXScholar, 2010. https://pdxscholar.library.pdx.edu/open_access_etds/31.

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This dissertation describes the development of a device capable of suspending a microscale object in a controlled flow. The uPIVOT is a system integrating two laser-based techniques: micron particle image velocimetry (uPIV) and optical tweezers (OT). The OT allows the suspension and manipulation of micron-sized objects such as microspheres or biological cells. uPIV provides imaging of the suspended object and velocity measurements from which fluid induced stresses can be determined. Using this device, we measured fluid velocities around an optically suspended polystyrene microsphere (an experi

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19

Wang, Gaoxuan. "Development of photonic instruments for measurement of aerosol optical properties." Thesis, Littoral, 2018. http://www.theses.fr/2018DUNK0470.

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À cause de leur diffusion et de leur absorption des radiations solaires, les aérosols atmosphériques jouent un rôle important dans l'évolution du climat terrestre. Les techniques de mesure actuelles apportent certes, des connaissances, sur le forçage radiatif mais les résultats possèdent généralement de larges incertitudes, souvent du même ordre de grandeur que la valeur elle-même. Ces incertitudes sont causées par le manque de précision sur les données liées aux propriétés optiques estimées de ces aérosols (comme l'absorption, la diffusion ou l'extinction). Elles découlent principalement des

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20

Rosich, Garrett Kyle. "Evaluation of GLO: a Solar Occultation Instrument for Measuring Atmospheric Trace Species on CubeSat Missions." Thesis, Virginia Tech, 2017. http://hdl.handle.net/10919/78013.

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CubeSats provide an inexpensive means for space-based research. However, optimal mission design depends on minimizing payload size and power. This thesis investigates the GLO (GFCR (Gas Filter Correlation Radiometry) Limb Occultation) prototype, a new small-form-factor design that enables sub-kilometer resolution of the vertical profile of atmospheric trace species to determine radiative influences. This technology improves SWAP (Size, Weight, And Power) over heritage SOFIE and HALOE instruments and provides a cost-effective alternative for solar occultation limb monitoring. A python script w

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21

Harris, Walter M., Kevin C. France, Brian T. Fleming, et al. "The LUVOIR Ultraviolet Multi-Object Spectrograph (LUMOS): instrument definition and design." SPIE-INT SOC OPTICAL ENGINEERING, 2017. http://hdl.handle.net/10150/626500.

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The Large Ultraviolet/Optical/Infrared Surveyor (LUVOIR) is one of four large mission concepts currently undergoing community study for consideration by the 2020 Astronomy and Astrophysics Decadal Survey. LUVOIR is being designed to pursue an ambitious program of exoplanetary discovery and characterization, cosmic origins astrophysics, and planetary science. The LUVOIR study team is investigating two large telescope apertures (9- and 15-meter primary mirror diameters) and a host of science instruments to carry out the primary mission goals. Many of the exoplanet, cosmic origins, and planetary

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22

Greek, Lloyd Shane. "Development and characterization of an optical fiber based instrument for ultraviolet resonance Raman spectroscopy of biomolecules." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 1998. http://www.collectionscanada.ca/obj/s4/f2/dsk2/tape17/PQDD_0003/NQ27149.pdf.

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23

Yiu, Patrick (Patrick Wai-Kit). "High speed swept source optical coherence tomography handheld instrument at 1310nm for point-of-care imaging." Thesis, Massachusetts Institute of Technology, 2018. http://hdl.handle.net/1721.1/115735.

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Thesis: S.M., Massachusetts Institute of Technology, Department of Electrical Engineering and Computer Science, 2018.<br>Cataloged from PDF version of thesis.<br>Includes bibliographical references.<br>Optical coherence tomography (OCT) is a novel biomedical imaging technique that functions as a type of "optical biopsy" by using low coherence interferometry to non-invasively generate high resolution cross-sectional images of tissue in real time. OCT has become a standard diagnostic tool in ophthalmology and investigators have demonstrated OCT in a variety of biomedical applications including c

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24

Su, Tianquan. "Asphercial Metrology for Non-Specular Surfaces with the Scanning Long-Wave Optical Test System." Diss., The University of Arizona, 2014. http://hdl.handle.net/10150/347221.

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Aspherical optics are increasingly used these days. The application of aspherical surfaces on large, astronomical telescope mirrors brings challenge to the fabrication. Since the surface radius of curvature varies across the surface, the grinding/polishing tool needs to change its shape when working on different parts of the surface, making surface error more easily embedded into the surface. Therefore, a tighter test-fab loop is needed to guide the fabrication process. To maximize the accuracy during the grinding of the surface and to minimize the working time in the polishing stage, a better

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25

Favier, Marine. "Vers un instrument commercial pour la mesure des rapports isotopiques par Optical Feedback Cavity Enhanced Absorption Spectroscopy." Thesis, Université Grenoble Alpes (ComUE), 2017. http://www.theses.fr/2017GREAY106.

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Les isotopes stables ont permis de faire des découvertes majeures en science, comme, la datation de l'apparition de l'oxygène sur Terre à partir des isotopes du soufre [1] et l'analyse des échanges entre le carbone atmosphérique et celui des autres réservoirs (biosphère, océans) à partir du rapport isotopique 13C/12C [2].Traditionnellement, les rapports isotopiques sont mesurés avec des spectromètres de masse dédiés (IRMS : « isotope ratio mass spectrometer »). Depuis une dizaine d’années, ils sont également remplacés par des spectromètres commerciaux basés sur la spectroscopie infrarouge. Ces

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26

Wei, Daikang [Verfasser]. "Development of an optical instrument for the observation of neutral winds in Earth's upper atmosphere / Daikang Wei." Wuppertal : Universitätsbibliothek Wuppertal, 2021. http://d-nb.info/1235343383/34.

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27

Lima, Dorival Kitakawa. "Transformadores para instrumentos ópticos: aspectos da viabilidade do seu uso pelas empresas do setor elétrico brasileiro." Universidade de São Paulo, 2009. http://www.teses.usp.br/teses/disponiveis/3/3143/tde-29062009-174116/.

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Os transformadores para instrumentos (TIs) são equipamentos essenciais para a realização das funções de medição e de proteção nos sistemas elétricos de potência. O mau funcionamento dos TIs nos sistemas de proteção pode provocar tanto atuações indevidas como falhas de operação e, em ambos os casos, acarretará prejuízos à concessionária ou a terceiros, podendo, ainda, serem gerados danos materiais ou pessoais. Quando os transformadores de corrente (TCs) ou de potencial (TPs) estão instalados em sistemas de medição para faturamento e não funcionam com a precisão necessária, milhares ou milhões d

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28

Rezaei, Alireza. "Detection of alterations in historical violins with optical monitoring." Electronic Thesis or Diss., université Paris-Saclay, 2022. http://www.theses.fr/2022UPASG054.

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La conservation préventive est le contrôle continu de l'état d'une œuvre d'art pour réduire le risque de dommages et minimiser les restaurations. De nombreuses méthodes ont été proposées pour atteindre cet objectif, soit à partir de données unimodales, soit par combinaison de différentes techniques d'analyse. Dans ce travail, nous présentons deux algorithmes probabilistes de clustering pour la détection d'altérations sur des surfaces vernies, telles que celles des instruments de musique historiques. Les deux méthodes reposent sur une approche a-contrario et le critère Nombre de Fausses Alarmes

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Martinod, Marc-Antoine. "Développement et exploitation scientifique d’un nouvel instrument interférométrique visible en optique guidée." Thesis, Université Côte d'Azur (ComUE), 2018. http://www.theses.fr/2018AZUR4215/document.

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L'interférométrie visible longue base est une technique d'observation en astronomie permettant de sonder les objets avec une résolution spatiale qu'il est impossible d'atteindre avec un télescope seul. La mise en œuvre au sol de cette méthode est limitée en sensibilité et précision de mesure à cause de la turbulence atmosphérique. Or les nouveaux besoins scientifiques, tels que la détermination des paramètres fondamentaux, l'étude de l'environnement proche ou de la surface des étoiles, requièrent la capacité d'observer des objets de moins en moins brillants et de faire des mesures de plus en p

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Olivéro, Aurore. "Développement d'un instrument plasmonique bimodal couplant SPRI et SERS pour la détection et l'identification de molécules biologiques." Thesis, Université Paris-Saclay (ComUE), 2016. http://www.theses.fr/2016SACLO017/document.

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L’imagerie par Résonance des Plasmons de Surface (SPRI) est une technique d’analyse d’interactions moléculaires présentant de nombreux avantages. Elle peut être appliquée en temps réel et sans marquage, pour étudier un grand nombre d’interactions simultanément sur un même échantillon. La transduction d’un événement d‘interaction entre deux molécules complémentaires en un signal optique, repose sur la perturbation de l’onde plasmonique évanescente créée à la surface d’un film métallique mince.Toutefois, bien que la mesure SPR soit directe et sans marquage, sa spécificité repose entièrement sur

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31

Weigelt, Andreas. "An optical particle counter for the regular application onboard a passenger aircraft: instrument modification, characterization and results from the first year of operation." Doctoral thesis, Universitätsbibliothek Leipzig, 2015. http://nbn-resolving.de/urn:nbn:de:bsz:15-qucosa-172724.

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To understand the contribution of aerosol particles to radiative forcing and heterogeneous chemical processes in the upper troposphere and lowermost stratosphere (UT/LMS), the knowledge of the particle size distribution is mandatory. Unfortunately, measurements in the UT/LMS are costly. Research aircrafts are expensive and thus their application is limited in time and space. Satellite remote sensing measurements provide a good temporal and spatial (horizontal) coverage, but only a limited vertical resolution and currently cannot resolve the particle size distribution. Therefore, within this th

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Zenteno, Omar. "Markerless tracking of a fiber-optical probe by endoscopic vision : Towards multispectral enhanced biopsy." Thesis, Orléans, 2020. https://theses.univ-orleans.fr/public/2020ORLE3181_va.pdf.

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Un prototype d’endoscope augmenté d’une sonde multispectrale a été développé au moyen d’un fibroscope inséré dans le canal opérateur d’un système endoscopique commercial et connecté à une caméra multispectrale snapshot (41 bandes dans la gamme de 470 à 975 nm). La sonde multispectrale fonctionne comme une biopsie optique localisée pour une exploration médicale complémentaire avec un champ de vision beaucoup plus petit que l’endoscope. Cette thèse aborde le problème d’un recalage in vivo des images bimodales (RGB endoscope/MS fibroscope) afin de fournir au chirurgien une localisation précise de

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Stefanescu, Alexander R. Verfasser], Jochen [Akademischer Betreuer] [Greiner, Lothar Akademischer Betreuer] Oberauer, and Andrzej [Akademischer Betreuer] [Buras. "Design and Application of an Optical High Time Resolution Instrument for High-Energy Transients / Alexander Stefanescu. Gutachter: Lothar Oberauer ; Andrzej Jerzy Buras. Betreuer: Jochen Greiner." München : Universitätsbibliothek der TU München, 2011. http://d-nb.info/1019587857/34.

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Biazon, Filho Alcino José. "Nova técnica de malha fechada para estabilização do ponto de operação de interrogadores de sensores com grade de bragg em fibras ópticas." [s.n.], 2012. http://repositorio.unicamp.br/jspui/handle/REPOSIP/260881.

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Orientador: José Antonio Siqueira Dias<br>Tese (doutorado) - Universidade Estadual de Campinas, Faculdade de Engenharia Elétrica e de Computação<br>Made available in DSpace on 2018-08-21T18:07:20Z (GMT). No. of bitstreams: 1 BiazonFilho_AlcinoJose_D.pdf: 3212736 bytes, checksum: 5eb7bde925a233493806c588f3c39cfe (MD5) Previous issue date: 2012<br>Resumo: Sensores de fibra óptica são imunes à interferência eletromagnética (EMI), e são uma excelente escolha para ser usado em ambientes eletricamente ruidosos aplicações em sensoriamento remoto, incluindo aeroespacial, ferroviário equipamentos de

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Kylner, Carina. "Light scattering for analysis of thermal stress induced deformation in thin metal films." Doctoral thesis, KTH, Fysik, 1997. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-2547.

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Today, thin film based devices are found in a wide field of applications. The main reasons are that thin film technology enables access to unique physical properties and possibilities to miniaturize devices. Thin film devices are generally described in terms such as electrical, optical and magnetical properties. However, the lifetime of these devices is often limited by mechanical stresses causing plastic deformation. An effect of the plastic deformation is hillocking where isolated features are created on the film surface. The continual need to improve performance, reduce size as well as cost

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Courrier, Emilie. "Biomarqueurs fluorescents, marqueurs et instruments optiques dédiés pour le diagnostic in vivo des pathologies cornéennes." Thesis, Lyon, 2017. http://www.theses.fr/2017LYSES029.

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Un déséquilibre dans les mécanismes de défense de la cornée peut entraîner une invasion par des micro-organismes (MO) et générer une kératite infectieuse (KI), ou encore un syndrome sec. Les KI sont la première cause de cécité monoculaire. Le syndrome sec, également fréquent, est sujet à de nombreuses études cliniques pour l’évaluation de nouveaux traitements. L’objectif de cette thèse est de mettre au point des méthodes d’imagerie pour le diagnostic et le suivi des pathologies de la surface oculaire au travers de deux projets innovants : 1/ le projet FLUOCOR consistant à développer une soluti

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Sengupta, Aritra. "Empirical Hierarchical Modeling and Predictive Inference for Big, Spatial, Discrete, and Continuous Data." The Ohio State University, 2012. http://rave.ohiolink.edu/etdc/view?acc_num=osu1350660056.

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Lloyd-Hart, Michael. "Novel techniques of wavefront sensing for adaptive optics with array telescopes using an artificial neural network." Diss., The University of Arizona, 1992. http://hdl.handle.net/10150/185749.

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Atmospheric turbulence causes severe degradation of the resolving and signal-to-noise properties of present optical telescopes. Diffraction-limited resolution can be recovered through the use of a deformable ('adaptive') optical element to correct the atmospheric wavefront error. An adaptive optics system operating in the near infrared (1.7 - 3.5 μm) has been developed for use at the Multiple Mirror Telescope (MMT), an array of six co-mounted 1.8 m telescopes, in which six flat mirrors are used to correct the wavefront tilt across each aperture, and the phase differences between apertures. Thi

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Turkmen, Coskun Aziz. "Calibration Of Conventional Measurement Transformers Against Harmonic Components By Using Field Measurements Of Optical Transducers And Resistive-capacitive Voltage Transformers." Master's thesis, METU, 2010. http://etd.lib.metu.edu.tr/upload/12611920/index.pdf.

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It is known from the literature that conventional voltage and current transformers measure inaccurate values for voltage and current harmonics which are parts of power quality. Maximum bandwidth of conventional current transformers, which are used in electricity transmission and distribution systems, is 1.5-2 kHz and it is lower for conventional voltage transformers. Also, it is known that<br>voltages in some frequency spectrum are measured higher and voltages in another frequency spectrum are measured lower by the conventional voltage transformers. Furthermore, because of the phase shift of f

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Junior, Shigueru Nagao. "Unidade eletrônica microprocessada para tratamento de sinais de transformadores de instrumentação ópticos e convencionais para aplicações metrológicas in situ." Universidade de São Paulo, 2017. http://www.teses.usp.br/teses/disponiveis/3/3143/tde-17032017-143745/.

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As elevadas perdas existentes no setor elétrico tem causado preocupação nas empresas de distribuição, aliadas ainda a necessidade crescente de um desenvolvimento econômico sustentável. Neste cenário a calibração periódica dos instrumentos destinados a medição (entre eles os transformadores de instrumentos) tornam-se essenciais e tais procedimentos encontram-se previstos no novo modelo de operação do setor elétrico. Porém, as dificuldades logísticas e operacionais de transporte a laboratórios metrológicos credenciados dificultam a execução de tais serviços. As técnicas e métodos desenvolvidos n

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Avramidis, Stefanos. "Simulation and parameter estimation of spectrophotometric instruments ." Thesis, KTH, Numerical Analysis and Computer Science, NADA, 2009. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-12292.

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<p>The paper and the graphics industries use two instruments with different optical geometry (d/0 and 45/0) to measure the quality of paper prints. The instruments have been reported to yield incompatible measurements and even rank samples differently in some cases, causing communication problems between these sectors of industry.A preliminary investigation concluded that the inter-instrument difference could be significantly influenced by external factors (background, calibration, heterogeneity of the medium). A simple methodology for eliminating these external factors and thereby minimizing

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Weigelt, Andreas [Verfasser], Markus [Akademischer Betreuer] Hermann, Alfred [Gutachter] Wiedensohler, and Carl A. M. [Gutachter] Brenninkmeijer. "An optical particle counter for the regular application onboard a passenger aircraft: instrument modification, characterization and results from the first year of operation / Andreas Weigelt ; Gutachter: Alfred Wiedensohler, Carl A.M. Brenninkmeijer ; Betreuer: Markus Hermann." Leipzig : Universitätsbibliothek Leipzig, 2015. http://d-nb.info/1239567154/34.

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Wake, Giulia M. G. H. "Exact minimisation of treatment time for the delivery of intensity modulated radiation therapy." University of Western Australia. School of Mathematics and Statistics, 2009. http://theses.library.uwa.edu.au/adt-WU2009.0195.

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This thesis investigates the exact minimisation of treatment delivery time for Intensity Modulated Radiation Therapy (IMRT) for the treatment of cancer using Multileaf Collimators (MLC). Although patients are required to remain stationary during the delivery of IMRT, inevitably some patient movement will occur, particularly if treatment times are longer than necessary. Therefore minimising the treatment delivery time of IMRT may result in less patient movement, less inaccuracy in the dosage received and a potentially improved outcome for the patient. When IMRT is delivered using multileaf coll

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Zhang, Hongping. "Image quality metrics for visual optical Instruments /." Online version of thesis, 1991. http://hdl.handle.net/1850/11217.

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Baumhammer, Megan. "Optical Instruments and the Early Modern Imagination." Thesis, The University of Sydney, 2013. http://hdl.handle.net/2123/11708.

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This thesis recontextualizes seventeenth century instruments. I explore their meaning through the ways in which they were discussed and thought about in contemporary texts, both scientific and literary: the imaginative treatment of the telescope through Kepler’s 1610 work Dissertatio cum Nuncio Sidereo and Milton’s Paradise Lost (1667); the microscope through Hooke’s Micrographia (1665). I pay particular attention to the role that the interaction between text and image has in the creation of meaning in this key work of the Royal Society. I argue that these instruments of the seventeenth centur

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Bertan, Hilton Henrique 1979. "Analise de aplicação e desempenho de uma esfera integradora em radiometros para calibração de medidores de potencia optica." [s.n.], 2007. http://repositorio.unicamp.br/jspui/handle/REPOSIP/260064.

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Orientador: Yuzo Iano<br>Dissertação (mestrado) - Universidade Estadual de Campinas, Faculdade de Engenharia Eletrica e Computação<br>Made available in DSpace on 2018-08-09T14:39:29Z (GMT). No. of bitstreams: 1 Bertan_HiltonHenrique_M.pdf: 3172256 bytes, checksum: d2360855eab8586655078c1c81464461 (MD5) Previous issue date: 2007<br>Resumo: Uma esfera integradora e suas propriedades foram estudadas a fim de se obter um padrão de referência em medição de potência óptica. Este trabalho apresenta pesquisas realizadas em laboratórios nacionais e internacionais. As medições com uma esfera foram com

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Simon, Anne-Laure. "Couplage de la spectrométrie de mobilité ionique et de la spectroscopie optique : études conformationnelles en phase gazeuse." Thesis, Lyon, 2016. http://www.theses.fr/2016LYSE1128/document.

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Cette thèse porte sur le développement d'un appareil couplant la spectrométrie de masse avec la spectrométrie de mobilité ionique et la spectroscopie laser, dans le but d'effectuer des analyses conformationnelles sur des édifices biomoléculaires. La construction, la mise au point et l'optimisation de l'appareil font l'objet de la première partie de ce mémoire. En particulier, il s'est agi de déterminer les caractéristiques de l'appareil (résolution, fréquence de fonctionnement…) par une série de tests sur des systèmes modèles. Dans un deuxième temps, nous avons effectué des mesures de spectros

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Igarashi, Gilberto. "Contribuições para a implementação de um barramento de processo segundo a norma IEC 61850-9." Universidade de São Paulo, 2015. http://www.teses.usp.br/teses/disponiveis/3/3143/tde-08072016-152036/.

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Desde seu lançamento, em 2002, a Norma IEC 61850 vem evoluindo para se tornar o padrão adotado nos Sistemas de Automação de Subestações. Dentre seus vários aspectos, destacam- se os serviços de tempo real, que permitem a implementação de funções de automação e de proteção dentro da subestação através da troca de mensagens específicas entre Dispositivos Eletrônicos Inteligentes através de um barramento digital de rede de dados. O objetivo central deste trabalho é explorar algumas das questões que envolvem a implementação de uma classe de serviços de tempo real: a transmissão de valores amostrad

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Olsson, Susanne, and Elin Adolfsson. "optiSeal : En förslutningsanordning för laparoskopiska instrument." Thesis, Högskolan i Halmstad, Akademin för ekonomi, teknik och naturvetenskap, 2018. http://urn.kb.se/resolve?urn=urn:nbn:se:hh:diva-37621.

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Becker, Theresia Caezilia. "Approaches to optimal inertial instrument calibration using slewing." Thesis, Massachusetts Institute of Technology, 2005. http://hdl.handle.net/1721.1/34142.

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Thesis (S.M.)--Massachusetts Institute of Technology, Dept. of Aeronautics and Astronautics, 2005.<br>Includes bibliographical references (p. 61).<br>Calibration of an inertial measurement unit is important to the success of accuracy-sensitive missions. This thesis analyzes calibration techniques for two inertial measurement mechanizations: (1) an inertially stabilized system and (2) an inertially referenced slew. An inertially referenced slew rotates the inertial measurement unit with respect to an inertial reference frame independent of the vehicle motion. The appropriate inertially referenc

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