Dissertations / Theses on the topic 'Laser Profiler'
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Meece, Adam. "Laser Guided Navigation System for the Automated Floor Profiler – String Walker Edition." University of Cincinnati / OhioLINK, 2017. http://rave.ohiolink.edu/etdc/view?acc_num=ucin1491557571704528.
Full textGhauri, Farzan Naseer. "Hybrid Photonic Signal Processing." Doctoral diss., University of Central Florida, 2007. http://digital.library.ucf.edu/cdm/ref/collection/ETD/id/3233.
Full textPh.D.
Optics and Photonics
Optics and Photonics
Optics PhD
Lam, Norris. "Modeling rating curves from close-range remote sensing data : Application of laser and acoustic ranging instruments for capturing stream channel topography." Doctoral thesis, Stockholms universitet, Institutionen för naturgeografi, 2017. http://urn.kb.se/resolve?urn=urn:nbn:se:su:diva-142135.
Full textEn avbördningskurva tillhandahåller ett funktionellt förhållande mellan vattendjup (dvs. vattenstånd) och flöde vid ett specifikt tvärsnitt i ett vattendrag. Avbördningskurvan blir en central komponent för generering av kontinuerliga tidsserier av vattenföring från tidsserier av vattenstånd. Eftersom det är tidskrävande att utveckla och underhålla avbördningskurvor erbjuder hydrauliska modeller attraktiva möjligheter att minska den insats som krävs för att utveckla avbördningskurvorna. En central utmaning för sådana modelleringsförfaranden är emellertid tillgången till noggrann topografidata av strömfåran och de omgivande stränderna. Den här avhandlingen fokuserar på tillämpningen av fjärranalystekniker för avståndsmätning på nära håll, såsom laserbaserade teknik (dvs. Light detection and ranging eller LiDAR) och akustisk baserat teknik (dvs. acoustic Doppler current profiler eller ADCP), för att fånga topografisk information för hydraulisk modellering av vattendrag i olika rumsliga skalor. Först presenteras en litteraturstudie av den nuvarande LiDAR-litteratur för att identifiera potentiella sätt att dra full nytta av dessa nya data och tekniker i framtiden. Detta följs av fyra sammanlänkade studier: (i) tillämpning av ett lågkostnads-laseravsökningssystem för att fånga kornstorleksfördelningar i ett litet vattendrag, (ii) syntetiskt förtunnad flygburen laserskanningsdata (ALS) applicerad i en fysiskt baserad hydraulisk modell för att utveckla avbördningskurvor, (iii) lågupplösta ALS från Svensk nationell höjdmodell kopplade med ADCP-batymetri för att ta fram en avbördningskurva med en hydraulisk modell, och (iv) undersökning av effekterna av osäkerheter på mätdata för att generera avbördningskurvor med en hydraulisk modell. Denna avhandling belyser potentialen för fjärranalystekniker för avståndsmätning på nära håll, för att fånga strömfårans exakta topografi och ifrån dessa data härleda de parametrar som krävs för hydrauliska modelleringstillämpningar.
At the time of the doctoral defense, the following paper was unpublished and had a status as follows: Paper 5: Manuscript.
Hoffman, Bradley R. "Evaluation of the Automated Laser Rut Measurement System Used by the Ohio Department of Transportation." Ohio University / OhioLINK, 2011. http://rave.ohiolink.edu/etdc/view?acc_num=ohiou1321627068.
Full textPolidori, Guillaume. "Etude par visualisation de sillages tridimensionnels : application à un profil d'aile rectangulaire." Poitiers, 1994. http://www.theses.fr/1994POIT2253.
Full textZemzemi, Imene. "High-performance computing and numerical simulation for laser wakefield acceleration with realistic laser profiles." Thesis, Institut polytechnique de Paris, 2020. http://www.theses.fr/2020IPPAX111.
Full textThe advent of ultra-short high-intensity lasers has paved the way to new and promising, yet challenging, areas of research in laser-plasma interaction physics. The success of building petawatt femtosecond lasers offers a promising path for designing future particle accelerators and light sources.Achieving this goal intrinsically relies on the combination of experiments and numerical modeling. So far, Particle-In-Cell (PIC) codes have been the ultimate tool to accurately describe the laser-plasma interaction especially in the field of Laser WakeField Acceleration (LWFA). Nevertheless, the numerical modeling of laser-plasma accelerators in 3D can be a very challenging task due to their high computational cost.A useful approach to speed up such simulations consists of employing reduced numerical modes which simplify the problem while retaining a high fidelity.Among these models, Fourier field decomposition in azimuthal modes for the cylindrical geometry is particularly well suited for physical problems with close to cylindrical symmetry, which is the case in LWFA.During my Ph.D., I first implemented this method in the open-source code SMILEI in the Finite Difference Time Domain (FDTD) discretization scheme for the Maxwell solver. However, this kind of solvers may suffer from numerical Cherenkov radiation (NCR). To mitigate this artifact, I also implemented Maxwell’s solver in the Pseudo Spectral Analytical Domain (PSATD) scheme which offers better accuracy of the results.This method is then employed to study the impact of realistic laser profiles from the Apollon facility on the quality of the accelerated electron beam. Its ability to correctly model the involved physical processes is investigated by determining the optimal number of modes and benchmarking its results with full 3D Cartesian simulations. It is shown that the imperfections in the laser pulse lead to differences in the results compared to theoretical profiles. They degrade the performance of laser-plasma accelerators especially in terms of the quantity of injected charge. These simulations, insightful for the future experiments of LWFA that will be held soon with the Apollon laser, put forward the importance of including realistic lasers in the simulation to obtain reliable results
Gabolde, Pablo. "Measurements of the spatio-temporal profiles of femtosecond laser pulses." Diss., Available online, Georgia Institute of Technology, 2007, 2007. http://etd.gatech.edu/theses/available/etd-06272007-101312/.
Full textTrebino, Rick, Committee Chair ; Kennedy, Brian, Committee Member ; Kuzmich, Alex, Committee Member ; Curtis, Jennifer, Committee Member ; Buck, John, Committee Member.
Rønningstad, Oyvind. "Device Profile layer for PDCP." Thesis, Norges teknisk-naturvitenskapelige universitet, Institutt for teknisk kybernetikk, 2013. http://urn.kb.se/resolve?urn=urn:nbn:no:ntnu:diva-23085.
Full textPrimartomo, A. "Laser surface treatment using customised heat source profiles." Thesis, Loughborough University, 2005. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.429008.
Full textWhaley, Chad. "Laser Guided Automated Floor Profiling - FloorWalker." University of Cincinnati / OhioLINK, 2017. http://rave.ohiolink.edu/etdc/view?acc_num=ucin1491558782298737.
Full textAumeyr, Thomas. "Development of a laser-wire beam profile monitor for PETRA-III and CLIC." Thesis, Royal Holloway, University of London, 2013. http://repository.royalholloway.ac.uk/items/2b7e6f3c-018c-c906-2534-c5b67f1ad7bf/6/.
Full textSmith, Christina Lynn. "Analysis of mixing layer heights inferred from radiosonde, wind profiler, airborne lidar, airborne microwave temperature profiler, and in-situ aircraft data during the Texas 2000 air quality study in Houston, TX." Texas A&M University, 2003. http://hdl.handle.net/1969.1/2300.
Full textWellburn, Daniel. "Circular laser beam intensity profile shaping for uniform surface treatments." Thesis, University of Liverpool, 2010. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.533912.
Full textFrancis, R. "Light profile imaging for the evaluation of laser weld quality." Thesis, Swansea University, 2002. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.637003.
Full textBourne, Carlton M. "Laser reflectance as a function of rough water glitter profile." Thesis, Monterey, California: U.S. Naval Postgraduate School, 1987. http://hdl.handle.net/10945/22331.
Full textDrummond, Fiona Jean. "Spectral interpretation of the melting layer using a wind profiler." Thesis, McGill University, 1994. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=55490.
Full textStraka, Michal. "Pájení laserovou diodou." Master's thesis, Vysoké učení technické v Brně. Fakulta elektrotechniky a komunikačních technologií, 2012. http://www.nusl.cz/ntk/nusl-219491.
Full textSantoso, Edi. "Surface fluxes and vertical profiles in the radix layer." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 1999. http://www.collectionscanada.ca/obj/s4/f2/dsk1/tape9/PQDD_0028/NQ38975.pdf.
Full textXu, Jingping. "Suspended sediment concentration profiles in the bottom boundary layer." W&M ScholarWorks, 1993. https://scholarworks.wm.edu/etd/1539616914.
Full textPottin, Bruno. "Etude d'un profileur optique de faisceaux intenses de protons par absorption laser." Phd thesis, Université Paris Sud - Paris XI, 2001. http://tel.archives-ouvertes.fr/tel-00001420.
Full textPrescott, Thomas. "Flux and profile measurements of an atomic beam using laser cooled atoms." Thesis, University of British Columbia, 2016. http://hdl.handle.net/2429/56697.
Full textScience, Faculty of
Physics and Astronomy, Department of
Graduate
Swales, Christopher. "Advance LDA techniques for measurement of 3D boundary layer velocity profiles on a helicopter rotor." Thesis, University of Bristol, 1994. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.327721.
Full textVeitel, Hansjörg. "Vertical profiles of NO2 and HONO in the boundary layer." [S.l.] : [s.n.], 2002. http://deposit.ddb.de/cgi-bin/dokserv?idn=964946211.
Full textWang, Hongzhi. "Development of laser system to measure pavement rutting." [Tampa, Fla.] : University of South Florida, 2005. http://purl.fcla.edu/fcla/etd/SFE0001371.
Full textYip, Wing Lam. "Resonance-enhanced laser-induced breakdown spectroscopy : how the beam profile of the ablation laser and the interception geometry and energy of the reheating laser affect analytical performance." HKBU Institutional Repository, 2009. http://repository.hkbu.edu.hk/etd_ra/1083.
Full textLee, David Alexander. "A Laser-Based Beam Profile Monitor for the RAL Front End Test Stand." Thesis, Imperial College London, 2010. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.520964.
Full textDeacon, Lawrence. "A micron-scale laser-based beam profile monitor for the international linear collider." Thesis, Royal Holloway, University of London, 2009. http://repository.royalholloway.ac.uk/items/a6163010-d859-63a9-7a72-189ddc8c3a34/9/.
Full textKemalli, Onur. "Measurements Of Velocity Profiles By Using Particle Image Velocimeter." Master's thesis, METU, 2009. http://etd.lib.metu.edu.tr/upload/3/12611068/index.pdf.
Full textBrooks, Donald Ray. "Development of Specialized Laser Doppler Velocimeters for High Resolution Flow Profile and Turbulence Spectral Measurements." Thesis, Virginia Tech, 2014. http://hdl.handle.net/10919/78089.
Full textMaster of Science
Gunal, Murat. "Modification of the Naval Postgraduate School Lidar System." Thesis, Monterey, Calif. : Springfield, Va. : Naval Postgraduate School ; Available from National Technical Information Service, 1995. http://handle.dtic.mil/100.2/ADA304245.
Full textJohansson, Peter. "Water absorption in two-layer masonry systems : properties, profiles and predictions /." Lund : Lund University, 2005. http://theses.lub.lu.se/scripta-archive/2005/11/15/tec_981/Doctoral_Thesis_TVBM-1024.pdf.
Full textArnqvist, Johan. "Mean wind and turbulence conditions over forests." Licentiate thesis, Uppsala universitet, Institutionen för geovetenskaper, 2013. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-219230.
Full textLundberg, Axel. "Temperature profiles and hardness estimation of laser welded heat affected zone in low carbon steel." Thesis, Malmö högskola, Fakulteten för teknik och samhälle (TS), 2014. http://urn.kb.se/resolve?urn=urn:nbn:se:mau:diva-20830.
Full textThermal modelling of hardness in the heat-affected zone (HAZ) in a laser welded steel plate is a cumbersome process both in calculation and simulation. The analysis is however important as the microstructural phase transformations induced by welding may cause unwanted hardness levels in the HAZ compared with that of the parent material. In this thesis analytical equations have been implemented and checked for validity against simulations made by other authors and against experimental values.With such a large field as thermal modelling, the thesis had to be narrowed down to make the analysis more subject focused. Limitations made were for mathematical modelling only looking at a two-dimensional heat flow in welded plates; in this thesis only the analytical solution to the heat flow is considered. The work was also directed towards steel; such a material as used largely all over the globe. As laser welding is a fast and cost-effective process, an analysis of hardness is of great importance. Work was divided into three overlapping parts; the first was to derive and understand the work done in the field of thermal modelling of welds, thus understanding the mathematics behind the basic problem. This modelling provides a number of curves and parameters from a thermal cycle, thus enabling one to do the hardness analysis correctly. Secondly, this mathematical modelling was applied to a number of cases, simulating different circumstances. This was done using self-programmed Graphical User Interfaces (GUI) for convenience. This enables engineers to easily plug in the materials and processing properties and thus simulate the required parameters and curves for further analysis.Lastly, a GUI for simulating the hardness of any point in the HAZ was programmed and used, thus implementing and validating the equations. A theoretical introduction of the phases induced in the HAZ is also included, in order of understanding the problems of unwanted hardness in the HAZ of laser-welded steel.Main conclusions of this thesis:•Mathematical modelling of heat transfer in welds by Rosenthal (1946) is still applicable for modern laser welding apparatus.•The empirical model presented by Ion et al. (1984) is not applicable with experimental results of hardness in the HAZ of the steels investigated here.•Equations by Ion (2005) are accurate for simulating the hardness.•The analytical solutions investigated are superior to numerical solutions with regard to quick, simple simulations of thermal cycles and hardness. Numerical solutions allows for more advanced modelling, which can be lengthy.•Preheating the steel prior to welding is favourable in reducing hardness levels, especially with steel of higher carbon equivalent.
Leimkuehler, Thomas O. "Investigation of low-pressure laser induced fluorescence for measuring temperature profiles in a rarefied gas /." free to MU campus, to others for purchase, 2000. http://wwwlib.umi.com/cr/mo/fullcit?p9999301.
Full textOh, Seong Yong. "Laser induced breakdown spectroscopy investigation of line profiles, slurries and artifical [sic] neural network prediction /." Diss., Mississippi State : Mississippi State University, 2007. http://library.msstate.edu/etd/show.asp?etd=etd-11062007-190817.
Full textVeitel, Hansjörg. "Vertical Profiles of NO 2 and HONO in the Planetary Boundary Layer." [S.l. : s.n.], 2002. http://www.bsz-bw.de/cgi-bin/xvms.cgi?SWB10047881.
Full textJohansson, Niclas, and Magnus Selegran. "Utformande av Sapa Profiler AB:s distributionsstruktur med syfte att uppfylla kundernas krav." Thesis, Linköping University, Department of Management and Economics, 2006. http://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-6183.
Full textSapa Profiler AB är ett företag inom den svenska metallindustrin och tillhör koncernen Sapa Group som finns över stora delar av världen. Bolaget är en del av koncernens kärnverksamhet Profiler som specialiserat sig på framställning av strängpressade profiler i aluminium.
Inom det strategiska affärssegmentet Automotive förses transportindustrin med komponenter till olika typer av fordon. Under de senaste åren har kundernas serviceanspråk ökat vilket bland annat yttrar sig i krav på kortare leveranstider och högre frekvens på inleveranserna. I dagsläget avhjälps högre servicekrav genom att ett lager lokaliseras i kundens närhet. Strategin leder i förlängningen till en decentraliserad lagerstruktur som kan vara svår att styra och kontrollera. Sapa Profiler AB behöver därför se över sitt sätt att distribuera varor till de europeiska kunderna. Studien tar sin utgångspunkt i en kartläggning av de 20 viktigaste kundernas krav och har som mål att rekommendera en framtida distributionsstruktur som kan bemöta den nya kravbilden till en låg totalkostnad.
Den rekommenderade lösningen utnyttjar två centrala lagerpunkter placerade i Nässjö och belgiska Ghlin som tillsammans tillgodoser huvuddelen av de nord- och centraleuropeiska kunderna. Dessutom används fem lokala lagerpunkter som är nödvändiga för att täcka in vissa kunders särskilt höga krav. Jämfört med en decentraliserad struktur kan företaget utnyttja stordriftsfördelar som ger betydande besparingar inom lagerhållning, administration, kommunikation och IT. Transportkostnaderna kan samtidigt hållas på en rimlig nivå.
Båda centrallagren är strategiskt placerade och ger företaget goda förutsättningar att knyta andra kunder till distributionsstrukturen. Lösningen är också kompatibel med företagets strategiska mål och kan anpassas till hur kundernas kravbild utvecklas i realiteten. Den ger företaget bättre möjligheter att utveckla serviceerbjudandet till kund för en ökad framtida konkurrensförmåga.
Raine, Kenneth William. "Advances in the measurement of optical fibre refractive index and axial-stress profiles." Thesis, King's College London (University of London), 1998. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.300025.
Full textLewandowski, George. "Engineering of Temperature Profiles for Location-Specific Control of Material Micro-Structure in Laser Powder Bed Fusion Additive Manufacturing." University of Dayton / OhioLINK, 2020. http://rave.ohiolink.edu/etdc/view?acc_num=dayton1588940683690978.
Full textKötter, Hanno. "Ein Beitrag zum Schrägschneiden von Leichtbauprofilen." Doctoral thesis, Saechsische Landesbibliothek- Staats- und Universitaetsbibliothek Dresden, 2010. http://nbn-resolving.de/urn:nbn:de:bsz:14-qucosa-63619.
Full textSinha, Roy Arijit. "Analysis and control of boundary layer transition on a NACA 0008 wing profile." Thesis, KTH, Mekanik, 2018. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-239931.
Full textCaplinger, James E. "ULTRAVIOLET RAYLEIGH SCATTER IMAGING FOR SPATIAL TEMPERATURE PROFILES IN ATMOSPHERIC MICRODISCHARGES." Wright State University / OhioLINK, 2014. http://rave.ohiolink.edu/etdc/view?acc_num=wright1401750986.
Full textWinslow, James F. "Investigation of spatial filtering for planar range-resolved pulsed laser ablated plume imaging." [Tampa, Fla.] : University of South Florida, 2004. http://purl.fcla.edu/fcla/etd/SFE0000370.
Full textTitle from PDF of title page. Document formatted into pages; contains 104 pages. Includes bibliographical references.
Schneider, Matthieu. "Perçage profond par laser : Analyse des processus physiques." Phd thesis, Université Pierre et Marie Curie - Paris VI, 2006. http://tel.archives-ouvertes.fr/tel-00271589.
Full text• Comprendre les phénomènes physiques intervenant au cours du perçage,
• Déterminer le profil des perçages à partir des paramètres expérimentaux.
La première étape a consisté en l'identification et le contrôle des paramètres opératoires du procédé. A cet égard, ces travaux ont permis de mettre en place des méthodes de caractérisation de la source laser et de son environnement. La limitation de certains diagnostics d'observation a entraîné le développement d'une nouvelle méthode d'analyse de la morphologie des perçages, appelée méthode DODO (Direct Observation of Drilled hOle).
Les études spécifiques concernant la physique du procédé, ont apporté des réponses originales et interprétables sur les mécanismes intervenant au cours du perçage par laser. Ces études traitent de l'absorption et de la transmission du rayonnement au cours du perçage, des divers effets hydrodynamiques engendrés et de l'évolution des profils résultants.
L'absorption au cours du procédé de perçage tend vers une valeur unique (80%) en fonction de la puissance crête incidente quelle que soit la nature du matériau cible. La décroissance de la transmission en fonction de l'épaisseur est due à l'absorption des parois du perçage. La détente de la vapeur métallique consécutive à l'irradiation est supersonique. Deux types de profils existent (U et V) et permettent de remonter sans ambiguïté aux paramètres lasers utilisés lors du perçage. Enfin, l'utilité du gaz d'assistance au cours du perçage est remise en cause. Il est démontré que celui-ci ne peut pénétrer dans le perçage au cours du procédé.
Ces résultats remettent en cause un ensemble de connaissances héritées de la découpe par laser. Ils constituent une solide base de données sur le sujet pour améliorer la maîtrise du procédé et valider de futurs codes de calcul.
Kohút, Jiří. "Srovnání pulsujícího proudění newtonské a ne-newtonské kapaliny v komplexní geometrii." Master's thesis, Vysoké učení technické v Brně. Fakulta strojního inženýrství, 2020. http://www.nusl.cz/ntk/nusl-416445.
Full textFlaud, Pierre-Marie. "Développement et caractérisation d'un spectromètre laser infrarouge par différence de fréquences : application à la spectroscopie infrarouge à très haute résolution." Paris 11, 2005. http://www.theses.fr/2005PA112285.
Full textFor laboratory studies and field measurements of atmospheric molecules, single-mode tuneable lasers are more and more used, in order to complete other instruments such as Fourier-transform spectrometers because of their limitations (in particular spectral resolution and signal-to-noise ratio that have an important impact on the accurate determination of molecular line parameters). We report here the development and characterization of a compact tuneable continuous-wave infrared laser, based on difference-frequency generation (DFG) using quasi phase-matching in periodically poled LiNbO3 (PPLN). Several 0. 1 microW of infrared radiation (tuneable in the 1800 à 3100 cm-1 range) are obtained using a diode-pumped Nd:YAG laser (output power about 800 mW at 1064 nm, linewidth 1 kHz) together with a tuneable external-cavity diode laser (output power about 10-50 mW in the 805-885 nm region, linewidth 1 MHz). Using this infrared DFG laser for absorption experiments of gas-phase molecules, both very high resolution (1 MHz) and a high signal-to-noise ratio (up to several 1000) can be achieved in measurement time of only a few minutes, as demonstrated using absorption spectra of N2O in different wavelength regions. Using this laser we have determined absolute intensities of infrared lines of NO2 (using a UV-visible set-up to measure the NO2 amounts) observing a systematic difference of about 5 % with respect to the HITRAN 2004 database. We have used the same laser for the first observation of collisional line-mixing between nuclear hyperfine components of HI lines (a phenomenon predicted over 20 years ago)
Moses, Lance. "Fluorescence Imaging of Analyte Profiles in an Inductively Coupled Plasma with Laser Ablation as a Sample Introduction Source." BYU ScholarsArchive, 2015. https://scholarsarchive.byu.edu/etd/4367.
Full textLarsson, Sören. "An industrial robot as carrier of a laser profile scanner : motion control, data capturing and path planning /." Örebro : Örebro universitet, 2008. http://urn.kb.se/resolve?urn=urn:nbn:se:oru:diva-1738.
Full textHeigoldt, Matthias [Verfasser], and Stefan [Akademischer Betreuer] Karsch. "Temporal dynamics of the longitudinal bunch profile in a laser wakefield accelerator / Matthias Heigoldt ; Betreuer: Stefan Karsch." München : Universitätsbibliothek der Ludwig-Maximilians-Universität, 2017. http://d-nb.info/1136270981/34.
Full textShirai, Katsuaki [Verfasser]. "Investigation and Application of Laser Doppler Velocity Profile Sensors toward Measurements of Turbulent Shear Flows / Katsuaki Shirai." Aachen : Shaker, 2010. http://d-nb.info/1122546777/34.
Full text