Thematische Bibliographien / Laser scannig

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Auswahl der wissenschaftlichen Literatur zum Thema „Laser scannig“

Autor: Grafiati

Veröffentlicht am 28. Juni 2021

Zuletzt aktualisiert am 12. Februar 2022

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Zeitschriftenartikel zum Thema "Laser scannig"

Opoka, Szymon, Pawel Malinowski, Tomasz Wandowski, L. Skarbek und Wieslaw Ostachowicz. „Damage Detection Using Electromechanical Impedance Technique Combined with Scanning Laser Vibrometry“. Key Engineering Materials 569-570 (Juli 2013): 687–94. http://dx.doi.org/10.4028/www.scientific.net/kem.569-570.687.

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The paper consists of two parts. First, Electromechanical Impedance (EMI) method is proven to be able to determine some vibrational characteristics of the investigated structure. In order to verify this statement, Scannig Laser Vibrometry (SLV) is used to correlate frequency peaks of velocity (or displacement) operational deflection shapes with corresponding ones obtained by EMI method. Finally, the influence of moisture content in CFRP sample on resonance peaks is investigated using EMI method. Damage detection indicator in this case is based on shifts of resonant peaks.

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Tirlapur, Uday K., Erhard Kranz und Mauro Cresti. „Characterisation of isolated egg cells,in vitrofusion products and zygotes ofZea maysL. using the technique of image analysis and confocal laser scanning microscopy“. Zygote 3, Nr. 1 (Februar 1995): 57–64. http://dx.doi.org/10.1017/s0967199400002380.

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SummaryChanges in membrane Ca2+, calcium receptor protein calmodulin, endoplasmic reticulum (ER), mitochondria and cellulose in unfixed, living, isolated egg cells and fusion products of pairs of one egg and one sperm cell ofZea maysL. have been investigated using chlorotetracycline, fluphenazine, immunocytochemical techniques, 3,3'dihexyloxa-carbocyanine iodide (DiOC6(3)) and calcofluor white in conjuction with computer-controlled video image analysis. In addition, confocal laser scannig microscopy has been used in conjuction with ethidium bromide to detect the nature and location of the sperm cell nuclear chromatin before and after karyogamy. Digitised video images of chlorotetra cycline (CTC) fluorescence reveal that egg cells contain high levels of membrane Ca2+in organelles present around the nucleus while the cytosolic signal is relatively low. Intense CTC fluorescence is invariably present just below the plasma membrane of egg cells and a certain degree of regionalised distribution of Ca2+in cytoplasm is also discrnible. Similarly, the fluphenazine (FPZ)-detectable calmodulin (CaM) and that localised immunocytochemically using monoclonal anti-CaM antibodies reveal high levels of Cam in the vicinity of the nucleus in egg cells. Only a few ER profiles and mitochondria could be visualised in the egg cell and no calcofluor fluorescence could be detected. Followingin vitrofertilisation of single isolated eggs substantial changes in the Ca2+levels occur which include an increase in the membrane Ca2+of the fusion product, particularly in the cytosol and around the nucleus. Unlike in the eggs the fine CTC fluorescence signal below the plasma membrane is not detectable in the fusion products. Compared with isolated egg cell protolasts an increase in the CaM level in the cytoplasm was observed in the fusion products. There is a slight increase in the CaM level in the cytoplasm was observed in the fusion products. There is a slight increase in the fluorescene around the fusion product is visible after 16 h in in culture. The sperm cell chromatin in the fusion product is highly condensed, unlike that of the egg cell, and confocally imaged serial optical sections of thein vitrofusion product reveal the occurrence of karyogamy 35 min following gamete fusion. First visual evidence for intermingling of sperm nuclear chromatin in the zygotic nuclei is also provided.

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Kim, Cheol Hee, Won Ho Choi und Ki Young Park. „Application of Laser Remote Welding to an Aluminum Automotive Part“. Materials Science Forum 654-656 (Juni 2010): 966–69. http://dx.doi.org/10.4028/www.scientific.net/msf.654-656.966.

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Aluminum alloys are extensively used in the automotive industry in response to increasing requirements for weight reduction in car body architecture. Laser welding of Al alloys has many advantages such as low heat input, narrow heat affected zone, minimal thermal distortion and flexibility. Recently, the development of high brightness lasers - thin disk lasers and fiber lasers enable long focal distance welding so that laser remote welding with scanning mirrors can be used in laser welding of Al alloys. In this study, laser remote welding was implemented to a heat shield part of an automobile by utilizing a 4kW disk laser and a 2-axis scanner. By replacing conventional resistance spot welding, the weld flange length could be reduced from 15mm to 8mm and a cycle time for each welding point could also be reduced from 3.5s to 0.6s.

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Jeong, In-Sook, Min-Sung Ban, Kwang-Eun Son und Byoung-Bag Lee. „Development of Ftheta Lens for Laser Scanning Unit“. Transactions of the KSME C: Industrial Technology and Innovation 1, Nr. 1 (01.07.2013): 13–19. http://dx.doi.org/10.3795/ksme-c.2013.1.1.013.

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NAP, Mircea Emil, Tudor SĂLĂGEAN, Petre Iuliu DRAGOMIR und Elemer Emanuel ȘUBA. „Using the Laser Scanning Technology in the Evaluation of a Building Located on Ion Neculce Street from Cluj-Napoca“. Bulletin of University of Agricultural Sciences and Veterinary Medicine Cluj-Napoca. Horticulture 76, Nr. 2 (19.11.2019): 221. http://dx.doi.org/10.15835/buasvmcn-hort:2019.0039.

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Laser scanning describes a method by which a surface is sampled or scanned using laser technology. The science of valuation has become more and more sophisticated as the development of society in general and of the economy in particular, in order to meet, eventually, complex information needs. The main idea of this project is to carry out scanning works in the framework of the evaluation report of a property. For this project, The Leica Scanstation C10 laser scanner was used and the following methods were applied for the scan operation: Backward Intersection Method, Deletion Method. For the valuation we used Market approach and Cost approach. The use of the laser scanner led to the expected results, namely the retrieval of an enormous volume of information collected from the field, of extremely high accuracy which subsequently helped to model a large number of details necessary to improve the evaluation process.

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Wang Wei, 王蔚, 沈杰 Shen Jie, 刘伟军 Liu Weijun, 卞宏友 Bian Hongyou, 李强 Li Qiang und 周瑜 Zhou Yu. „脉冲激光清洗过程中振镜扫描速度对TA15钛合金表面氧化层的影响“. Chinese Journal of Lasers 48, Nr. 18 (2021): 1802004. http://dx.doi.org/10.3788/cjl202148.1802004.

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Lubis, Fadhli Umar. „METODE FADHLI FAME LANER UNTUK ALAT 3D LASER SCANNER“. Journal of Mechanical Engineering and Mechatronics 3, Nr. 1 (18.01.2019): 21. http://dx.doi.org/10.33021/jmem.v3i1.534.

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The 3D laser scanner that will be used in this study is a design tool for students of the 2007 Mechanical Engineering Department. This tool has been validated and used in several studies. Improvements to the 3D Laser Scanner tool are still being carried out, especially in the accuracy of the geometry of the 3D model produced and the time required in the processing of the scanning data. The research was conducted with the aim to increase the results obtained from the scanning process in order to have maximum results and have a fast processing time. In the research conducted, there are several differences with the previous method, namely the use of Visual Basic, supporting software, placing the camera and laser and camera settings. Based on the results of the study, the final results of the scan show the size of the test object has a smaller deviation of 8.12% for height, 0.8% for width and 19.3% for the neck, compared to previous studies of 61.09% for height, 51.8% for width and 40.75% for neck. For the time of the scanning process, there is a shortening of time that is very far compared to previous research, namely the time needed for 1 minute 56 seconds, while in the previous study it took 1 hour 41 minutes 37 seconds.

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Tan Ge, 谭舸, 花向红 Hua Xianghong, 陶武勇 Tao Wuyong, 赵不钒 Zhao Bufan und 李丞 Li Cheng. „基于激光跟踪仪的多测站地面激光扫描点云配准方法“. Chinese Journal of Lasers 48, Nr. 17 (2021): 1710002. http://dx.doi.org/10.3788/cjl202148.1710002.

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Wang, Xiao Gang, Xin Zhan Li und Yue Li. „A Novel Modeling Method Based on Telmat Laser Scanning System“. Applied Mechanics and Materials 55-57 (Mai 2011): 1079–84. http://dx.doi.org/10.4028/www.scientific.net/amm.55-57.1079.

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Though 3D body scanning system is most developed system for achieving body data, there are some scanning dead angles when body is scanned. Based on the scanning file produced by Telmat 3D body scanner, the structure of scanning file was introduced and model algorithm was analyzed. Holes in model were produced because of scanning dead angles, where were on the side of arms, on the side of legs, on the side of upper body, in the side of arms and in the side of legs. A 3D system was developed to automatically read the scanning file and reconstruct body model in it. At the same time holes can be automatic identified and repaired by this system. Then the model repaired was compared to the initial model produced by Telmat system and to confirm the integrality. The algorithm of program is fit to 3D scanning file from all kinds of body scanner system, which holes were produced. The automatic system perfected 3D scanning system and overcome the difficulty produced by the hardware in scanning system.

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Hu, H. C., G. Q. Zhou, X. Zhou, Y. Z. Tan und J. D. Wei. „DESIGN AND IMPLEMENT OF A CONICAL AIRBORNE LIDAR SCANNING SYSTEM“. ISPRS - International Archives of the Photogrammetry, Remote Sensing and Spatial Information Sciences XLII-3/W10 (08.02.2020): 1247–52. http://dx.doi.org/10.5194/isprs-archives-xlii-3-w10-1247-2020.

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Abstract. At present, the main LiDAR is single-point lidar. APD arrays and laser arrays are restricted to exit, so the number of area array LiDAR is scarce. Single-point lidar can't form a scanning pattern with only one laser point on the ground after launching laser, so it must have a set of scanning device for single-point lidar. The scanning device designed in this paper forms a circular scanning area on the ground by rotating the refraction prism, and at the same time forms a conical field of view. At present, marine LiDAR uses this kind of scanner more frequently. The advantages of this scanner are: simple mechanical structure and smooth operation. Overlapping elliptical scanning trajectories can be obtained during flight, which increases scanning density. Ultra-low dispersion glass is used as refractive prism in this paper. In a certain range of laser frequencies, the refractive prism has almost the same effect on laser refraction at different frequencies. The simulation results show that the scanner can be used as a common LiDAR scanner or a dual-frequency LiDAR scanner.

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Dissertationen zum Thema "Laser scannig"

Rodrigues, Lidiany Karla Azevedo. „O uso do laser de CO2 na prevenção da carie dentaria“. [s.n.], 2005. http://repositorio.unicamp.br/jspui/handle/REPOSIP/288097.

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Orientador: Marines Nobre dos Santos Uchoa
Tese (doutorado) - Universidade Estadual de Campinas, Faculdade de Odontologia de Piracicaba
Made available in DSpace on 2018-08-04T20:08:54Z (GMT). No. of bitstreams: 1 Rodrigues_LidianyKarlaAzevedo_D.pdf: 4376856 bytes, checksum: 25da7c3f75a95b91dee027db3b7a19fa (MD5) Previous issue date: 2005
Resumo: A irradiação do esmalte dental com laser de CO2, especialmente se associada ao flúor, aumenta a resistência deste substrato ao desafio ácido. Deste modo, esta tese, constituída por 3 artigos, teve por objetivos: (1) descrever as características do laser de CO2 e revisar a literatura disponível enfocando seus efeitos na prevenção de cárie em esmalte e dentina, bem como discutir os efeitos deste mesmo laser quando associado ao flúor; (2) investigar, in vitro, o efeito do laser de CO2 (? = 10,6 µm), com duas densidades de energia, na inibição da desmineralização ao redor de restaurações de resina composta; (3) avaliar in situ os efeitos combinados de um TEA (Transversely Excited Atmospheric-pressure) laser de CO2 (? = 9,6 µm) e do dentifrício fluoretado na desmineralização do esmalte dental humano. No estudo 1, a literatura científica pertinente ao assunto foi pesquisada usando a base de dados medline e busca manual de referências citadas em artigos científicos. No estudo 2, preparos cavitários realizados com ponta diamantada em esmalte hígido tiveram seu ângulo cavo-superficial irradiado com laser de CO2 com 8 ou 16 J/cm2. Através de microdureza em corte longitudinal, avaliou-se a perda mineral in vitro dos grupos experimentais e controle no esmalte ao redor da restauração. No estudo 3, foi testado in situ o efeito do laser de CO2 com 1,5 J/cm2 associado ou não à utilização de dentifrício fluoretado na prevenção de cárie dentária. Avaliou-se a perda mineral do esmalte dental humano nos grupos experimentais e controle. Os resultados dos estudos 2 e 3 foram analisados estatisticamente pelos testes ANOVA e Tukey com nível de significância fixado em 5%. A análise da literatura apresentada no artigo 1 mostrou que pode haver um futuro promissor para o laser de CO2 na prevenção de cárie dentária tendo seu efeito preventivo potencializado quando utilizado em associação a compostos fluoretados. Os resultados do artigo 2 demonstraram que o laser utilizado foi efetivo na inibição da desmineralização do esmalte ao redor de restaurações de resina composta (p < 0,05) e que o aumento da energia não potencializou o efeito do laser. No terceiro estudo, observou-se que os tratamentos com laser e/ou dentifrício fluoretado foram capazes de inibir a desmineralização do esmalte in situ, tendo sido observado o melhor resultado de inibição da desmineralização quando o laser foi associado à utilização de dentifrício fluoretado. Em conclusão, os resultados desses estudos indicam que o laser de CO2 é capaz de inibir a desmineralização do esmalte dental humano em situações de alto desafio cariogênico in vitro e in situ, apresentando efeito sinérgico quando associado ao flúor
Abstract: The irradiation of dental enamel by CO2 laser, especially if combined with fluoride, increases the enamel acid resistance. Thus, this thesis, comprised by 3 manuscripts, aimed: (1) to describe the characteristics of the CO2 laser and to review the literature with regard to its effects on caries inhibition in enamel and dentin. Another aim of this review is to discuss the effects of the CO2 laser in combination with fluoride; (2) to investigate, in vitro, the effect of a carbon dioxide laser (? = 10.6 µm), with two energy densities, on the enamel inhibition of demineralization around composite restorations; (3) to assess in situ the combined effects of a 9.6 µm TEA (Transversely Excited Atmospheric-pressure) CO2 laser and fluoride dentifrice on the demineralization of human dental enamel. In study 1, the scientific literature related to the issue was searched using medline and manual tracing of references cited scientific papers. In study 2, cavity preparations performed with diamond bur on sound enamel had their cavo surface angle irradiated with CO2 laser using 8 or 16 J/cm2. In vitro mineral loss, in experimental and control groups, was evaluated in the enamel around the restoration. In manuscript 3, the in situ caries preventive effect of the CO2 laser, with 1.5 J/cm2, associated or not to fluoridated dentifrice, was tested. In the human dental enamel, mineral loss was evaluated, by cross-sectional microhardness, in experimental and control groups. The results of studies 2 and 3 were analyzed by ANOVA and Tukey test. The literature analysis presented in study 1 showed that there can be a promising future for CO2 laser in caries prevention and its preventive effect is improved when associated to fluoride products. The results of study 2 demonstrated that the laser used was effective in inhibiting enamel demineralization around the composite restorations (p < 0.05). In the third manuscript, it was observed that the treatments with laser and/or fluoridated dentifrice were able to inhibit the in situ enamel demineralization and the best demineralization inhibition result was observed when laser was combined with fluoridated dentifrice use. In conclusion, the results of these studies suggest that CO2 laser is able of inhibiting enamel demineralization, in in vitro and in situ high cariogenic challenge situations, showing synergic effect with fluoride
Doutorado
Cariologia
Doutor em Odontologia

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Penk, David. „Vyhotovení 3D modelu části budovy SPŠ stavební Brno“. Master's thesis, Vysoké učení technické v Brně. Fakulta stavební, 2021. http://www.nusl.cz/ntk/nusl-444256.

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The thesis deals with the creation of a 3D model from data collected by laser scanning. The first part deals with the theoretical foundations of buildings information modeling and method of laser scanning. The rest of the work describes the detailed process from data collection to the creation of the model. Most of the space is devoted to work in the Revit software environment.

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Pan, Jingyi. „Confocal scanning laser tomography and scanning laser Doppler flowmetery in the rat eye“. Thesis, National Library of Canada = Bibliothèque nationale du Canada, 1999. http://www.collectionscanada.ca/obj/s4/f2/dsk2/ftp01/MQ49422.pdf.

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Svedberger, Johan, und Jonas Andersson. „Laser scanning in manufacturing industries : The potential and usability of laser scanning for industrial applications“. Thesis, KTH, Industriell produktion, 2013. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-134954.

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Making mistakes or discovering errors too late in the factory layout process is very costly. Unfortunately, the layouts aren’t always accurate or updated which creates a degree of uncertainty when it comes to installation of new equipment and rebuilding facilities. It also leads to a lot of waste in movement when employees has to go out in production to perform measurements, take pictures and take notes in order to remember important details to avoid errors. Lasers in land and engineering surveying instruments have been widely used for the last 30 years. A natural development has been to add a scanning mechanism to a total station that were already equipped with laser rangefinders and angular encoders, allowing automated measurement and location of thousands of nonspecific points. The automobile industry has begun to see the potential of laser scanning, mainly because of the development of the software handling the scan results, the point clouds. Scania, in collaboration with the FFI research project at the Royal Institute of Technology (KTH), therefore wanted to investigate how the new possibilities of 3D laser scanning can facilitate the development and maintenance of production systems and how it could be implemented in the current factory design process. By scanning three locations at Scania related to machining, assembly and aftermarket service the usability of the results has been investigated with the software Faro Scene and Bentley Pointools V8i. The results of the study showed that the laser scanning technology can generate several possibilities for manufacturing industries. The technology can be profitable and the modern point cloud software and applications could support the work of the layout design process greatly. Three main application areasfound:  Visualization & communication: The point cloud is an excellent information carrier and can easily be used as a visualization aid for meetings or simply to refreshing memories of a location. It also provides the possibility to view and examine a location remotely.  Gather information: The measuring possibilities are immense, allowing single point and distance measurements without the concern of interfering with objects. The method can to some extent replace the current approach in measuring buildings and floor flatness.  Simulation & verification: Software can perform advanced simulations and verifications of existing and future layouts, models and installations. Parts of the point cloud can be colorized, hidden, removed, duplicated or transformed. Existing 2D layout drawings or 3D models can be attached and verified relative the point cloud. The attached objects can be simulated with clash collision or differencing. Keywords: 3D Laser Scanning, TLS, CAD, Point Cloud, Factory Layout, Faro Scene, Bentley Pointools V8i, FactoryDesign Process, Factory Scanning Process.

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Shinpaugh, Kevin A. „Measurements in the bimodal region of a wing-body junction flow with a rapidly-scanning two-velocity-component laser-Doppler velocimeter“. Diss., This resource online, 1994. http://scholar.lib.vt.edu/theses/available/etd-06062008-163435/.

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葉社榮 und Sair-wing Yip. „Discontinuity survey using laser scanning technology“. Thesis, The University of Hong Kong (Pokfulam, Hong Kong), 2003. http://hub.hku.hk/bib/B30431670.

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Maillaud, Fabrice Franck Maurice. „Performance enhancement of laser scanning displays“. Thesis, University of the West of England, Bristol, 2000. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.311879.

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Sexton, Cornelius Leo. „Rapid Alloy Scanning by laser cladding“. Thesis, University of Liverpool, 1995. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.320605.

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Chen, Kenwei. „Intelligent scanning in selective laser sintering /“. Digital version accessible at:, 1998. http://wwwlib.umi.com/cr/utexas/main.

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Townsend, Russell James. „Experimental study of a scanning laser doppler flowmeter“. University of Western Australia. Centre for Ophthalmology and Visual Science, 2005. http://theses.library.uwa.edu.au/adt-WU2005.0063.

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[Truncated abstract] Purpose: To improve our ability to interpret and validate Heidelberg Retina Flowmeter (HRF) flow images by recording flow measurements from specific regions of the retinal vasculature in in-vitro and in-vivo eye models in which retinal blood flow can be manipulated. Methods: The first experiments utilised an isolated perfused pig eyes perfused with a 50%/50% Krebs/RBC solution at known flow rates ranging from zero to 300 μl/min. After HRF image acquisition, the retinal vasculature was perfused with fluorescein isothiocyanate (FITC), for fluorescence microscopy. Using the standard HRF software and a 10×10 pixel measurement window, flow rates were measured from a retinal artery, vein, arteriole, venule, and the retinal capillary bed and a capillary-free-zone. The relationship between HRF measured flow and perfusion flow in the different measurement regions was determined. For the second study, HRF flow images were acquired at retinal sites in Brown Norway rats over a range of focus levels before and after cessation of retinal blood flow by laser-induced central retinal artery occlusion. Using the 10×10 pixel and 4×4 pixel measurement windows, HRF measured flow was performed in retinal artery, vein, arteriole, capillary and choroidal vessel locations. The relationship between HRF measured flow and focus depth was determined for each location before and after central retinal artery occlusion. At the conclusion of each experiment the effect of reduction of systemic blood pressure (by exsanguination) on HRF flow measurements in choroidal vessels and in locations without visible choroidal vessels was assessed. Finally, HRF flow measurements were acquired after euthanasia, to determine the HRF flow signal which was still present under zero biological flow conditions (the zerooffset). Results: In the isolated perfused pig eye experiments it was found that the HRF flow response varied according to vascular location. At zero perfusate flow, HRF flow was consistently greater than zero at all locations, averaging 171.9 ± 44.7 AU (n=97), representing background noise. Arteries and veins yielded the highest HRF measured flow values, but the relationship between HRF measured flow and perfusate flow was not linear. In arterioles the HRF flow was more linear over a broader range of perfusate flow rates but the peak flow signal was an order of magnitude smaller than that in arteries and veins. Both the linearity and magnitude of the flow signal in venules was less than that in arterioles.

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Bücher zum Thema "Laser scannig"

Marshall, Gerald, Hrsg. Laser Beam Scanning. Taylor & Francis Group, 6000 Broken Sound Parkway NW, Suite 300, Boca Raton, FL 33487-2742: CRC Press, 2017. http://dx.doi.org/10.4324/9780203749142.

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Beiser, Leo. Laser scanning notebook. Bellingham, Wash: SPIE Optical Engineering Press, 1992.

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Sampaolesi, Juan R., Hrsg. Laser Scanning: Update 1. Dordrecht: Springer Netherlands, 2001. http://dx.doi.org/10.1007/978-94-010-0322-3.

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David, Shotton, und Royal Microscopical Society, Hrsg. Confocal laser scanning microscopy. Oxford: BIOS Scientific in association with the Royal Microscopical Society, 1997.

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Scheuerle, Alexander F. Atlas of Laser Scanning Ophthalmoscopy. Berlin, Heidelberg: Springer Berlin Heidelberg, 2004.

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Scheuerle, Alexander F., und Eckart Schmidt. Atlas of Laser Scanning Ophthalmoscopy. Berlin, Heidelberg: Springer Berlin Heidelberg, 2004. http://dx.doi.org/10.1007/978-3-642-59288-1.

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Shan, Jie, und Charles K. Toth, Hrsg. Topographic Laser Ranging and Scanning. Second edition. | Boca Raton : Taylor & Francis, CRC Press, 2018.: CRC Press, 2018. http://dx.doi.org/10.1201/9781315154381.

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Pfeifer, Norbert. Laser scanning applications in geomorphology. Stuttgart: Borntraeger, 2011.

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Handbook of optical and laser scanning. 2. Aufl. Boca Raton, FL: CRC Press, 2012.

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Pradhan, Biswajeet, Hrsg. Laser Scanning Applications in Landslide Assessment. Cham: Springer International Publishing, 2017. http://dx.doi.org/10.1007/978-3-319-55342-9.

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Buchteile zum Thema "Laser scannig"

Vosselman, George. „Laser Scanning“. In Encyclopedia of GIS, 609–12. Boston, MA: Springer US, 2008. http://dx.doi.org/10.1007/978-0-387-35973-1_685.

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Rüther, Heinz. „Laser Scanning“. In Encyclopedia of Earth Sciences Series, 581–83. Cham: Springer International Publishing, 2018. http://dx.doi.org/10.1007/978-3-319-73568-9_300.

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Rüther, Heinz. „Laser Scanning“. In Selective Neck Dissection for Oral Cancer, 1–2. Cham: Springer International Publishing, 2017. http://dx.doi.org/10.1007/978-3-319-12127-7_300-1.

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Vosselman, George. „Laser Scanning“. In Encyclopedia of GIS, 1–4. Cham: Springer International Publishing, 2016. http://dx.doi.org/10.1007/978-3-319-23519-6_685-2.

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Vosselman, George. „Laser Scanning“. In Encyclopedia of GIS, 1116–19. Cham: Springer International Publishing, 2017. http://dx.doi.org/10.1007/978-3-319-17885-1_685.

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Sincerbox, Glenn. „Holographie Scanners“. In Laser Beam Scanning, 1–62. Taylor & Francis Group, 6000 Broken Sound Parkway NW, Suite 300, Boca Raton, FL 33487-2742: CRC Press, 2017. http://dx.doi.org/10.4324/9780203749142-2.

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Sherman, Randy. „Polygonal Scanners“. In Laser Beam Scanning, 63–123. Taylor & Francis Group, 6000 Broken Sound Parkway NW, Suite 300, Boca Raton, FL 33487-2742: CRC Press, 2017. http://dx.doi.org/10.4324/9780203749142-3.

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Lawler, Anthony, und Joseph Shepherd. „Windage of Rotating Polygons“. In Laser Beam Scanning, 125–47. Taylor & Francis Group, 6000 Broken Sound Parkway NW, Suite 300, Boca Raton, FL 33487-2742: CRC Press, 2017. http://dx.doi.org/10.4324/9780203749142-4.

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Shepherd, Joseph. „Bearings for Rotary Scanners“. In Laser Beam Scanning, 149–91. Taylor & Francis Group, 6000 Broken Sound Parkway NW, Suite 300, Boca Raton, FL 33487-2742: CRC Press, 2017. http://dx.doi.org/10.4324/9780203749142-5.

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Montagu, Jean. „Galvanometric and Resonant Low Inertia Scanners“. In Laser Beam Scanning, 193–288. Taylor & Francis Group, 6000 Broken Sound Parkway NW, Suite 300, Boca Raton, FL 33487-2742: CRC Press, 2017. http://dx.doi.org/10.4324/9780203749142-6.

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Konferenzberichte zum Thema "Laser scannig"

Jeong, Hee-Moon, Yong-Hwa Park, Hyun-Ku Jeong, Yong-Chul Cho, Seok-Mo Chang, Jun-O. Kim, Seok-Jin Kang, Jun-Sik Hwang und Jin-Ho Lee. „Slow scanning electromagnetic MEMS scanner for laser display“. In MOEMS-MEMS 2008 Micro and Nanofabrication, herausgegeben von David L. Dickensheets und Harald Schenk. SPIE, 2008. http://dx.doi.org/10.1117/12.762549.

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Wan Aziz, W. A., M. Z. Syahmi, A. Anuar und Nizam T. Khairul. „Terrain slope analyses between terrestrial laser scanner and airborne laser scanning“. In 2012 IEEE Control and System Graduate Research Colloquium (ICSGRC). IEEE, 2012. http://dx.doi.org/10.1109/icsgrc.2012.6287169.

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Zhao, Yuan, Zhongxian Chen, Yu Zhang, Meng Tang, Liping Liu und XiuDong Sun. „Device for performance detection of optical scanner“. In ICO20:Lasers and Laser Technologies, herausgegeben von Y. C. Chen, Dianyuan Fan, Chunqing Gao und Shouhuan Zhou. SPIE, 2006. http://dx.doi.org/10.1117/12.667170.

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Ventura, M. E., P. L. A. Hilario, G. Tapang und C. Saloma. „Bessel beam scanning without mechanical scanner“. In 2015 11th Conference on Lasers and Electro-Optics Pacific Rim (CLEO-PR). IEEE, 2015. http://dx.doi.org/10.1109/cleopr.2015.7376168.

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Kokamägi, Kaupo, Natalja Liba, Kristo Must und Martin Sirk. „Accuracy Assessment of Mobile Laser Scanning Elevation Data in Different Vegetation Areas“. In Environmental Engineering. VGTU Technika, 2017. http://dx.doi.org/10.3846/enviro.2017.202.

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Due to the overall development of technology, laser scanning has reached a new level. During the last decade, all the different technologies necessary for mobile laser scanning, have been developed. Due to the fact that mobile laser scanning brings the need to process very large amounts of data, development of computers and software is also very important. The aim of current research was to assess the accuracy of mobile laser scanning elevation data in different vegetation areas and to explore if mobile laser scanning could be used as an alternative to aerial laser scanning. This article only covers the data collecting, processing and accuracy assessment aspects of the research. Data used in current study was collected in summer of 2015, during mobile laser scanning of Põltsamaa-Kärevere section of E263 route (Tallinn-Tartu-Võru-Luhamaa). Three smaller, differently vegetated, sections were picked from the large project to study the accuracy of elevation data. For accuracy assessment, the mobile laser scanning elevation data was compared to the checkpoints measured with GNSS (Global Navigation Satellite Systems) device. Ground profiles were drawn based on mobile laser scanning data. For objective assessment, accuracy of mobile laser scanning elevation data was compared to accuracy of ground profile elevation data and aerial laser scanning elevation data. The study found that the RMSE (Root Mean Square Error) in the I section, which was a field vegetated with 1 metre high crop, was 0,98 metres. RMSE in the II section, which was a pasture with low and sparse vegetation, was 0,23 metres. RMSE in the III section, which contained a bushy ditch and a field behind it, was 0,61 metres. Results show that the accuracy of mobile laser scanning elevation data depends substantially on the density of vegetation in scanned areas and that drawing ground profiles reduced the RMSE of mobile laser scanning elevation data. Results show that the accuracy of mobile laser scanning elevation data depends substantially on the density of vegetation in scanned areas. On this basis it can be concluded, that the most reasonable time to conduct mobile laser scanning would be during a season, when vegetation is the sparsest. It can also be concluded that drawing ground profiles makes mobile laser scanning data more accurate.

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Xu, Yingshun, Jin Cheng und Naitao Xu. „Vibrating Dichroic MEMS Scanner Towards Ultrasmall Laser Scanning Microscopes“. In 2018 International Conference on Optical MEMS and Nanophotonics (OMN). IEEE, 2018. http://dx.doi.org/10.1109/omn.2018.8454548.

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Yongling, Zhang, Zhao Wan und Wang Shuai. „Study of Laser 3D Scanning Model Reconstruction for Nuclear Facilities Decommissioning“. In 2020 International Conference on Nuclear Engineering collocated with the ASME 2020 Power Conference. American Society of Mechanical Engineers, 2020. http://dx.doi.org/10.1115/icone2020-16160.

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Abstract The laser 3D scanning model reconstruction is an effective technical means for the reconstruction of 3D virtual scenes of old nuclear facilities. However, the existing technology have the following problems: First, the scanning equipment needs to be installed on the triangular fixed bracket, which requires personnel to be installed on site, thereby bringing radiation safety risks to personnel; second, it requires the person to reconstruct and splice the model one face by one face, which is inefficient. Aiming to deal with these problems, this paper proposes a mobile laser 3D scanning method and a rapid model reconstruction technology. These methods include: (1) In order to realize fast scanning of large-scale scenes, and at the same time ensure accurate scanning of local important objects, a laser three-dimensional composite scanning method is proposed. (2) Design and development of a remote control automatic walking and fixing device, which can transport the laser 3D scanner to the position of measurement which is needed. The device has a certain ability to overcome obstacles, and can be reliably fixed to ensure the stability and scanning accuracy of the laser scanner at high speed working station. You can remotely control the laser scanner to start or stop working. The difficulty of this technology is how to make sure the device has the flexibility in motion and the stability on working; (3) An automatic model reconstruction and feature identification method based on a large number of point cloud data is proposed, and the corresponding software is developed. This method can realize the automatic recognition of the standard and common models, and the automatic model reconstruction of the point cloud data in the scene. To achieve this goal, the neural network algorithm is used. These technologies can effectively reduce the radiation safety risk of personnel during laser scanning in high-radioactive places, reduce the intensity of personnel operations, and improve work efficiency.

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Zhou, Chi, Hang Ye und Feng Zhang. „A Novel Low-Cost Stereolithography Process Based on Vector Scanning and Mask Projection for High-Accuracy, High-Speed, High-Throughput and Large-Area Fabrication“. In ASME 2014 International Design Engineering Technical Conferences and Computers and Information in Engineering Conference. American Society of Mechanical Engineers, 2014. http://dx.doi.org/10.1115/detc2014-35384.

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Photopolymerization based process is one of the most popular additive manufacturing processes. Two primary configurations for this process are laser based vector by vector scanning (0D) and projection based layer by layer exposing (2D). With the highly focused fine laser, the scanning based process can accomplish very high surface finishing and precision, however, due to the serial nature of scanning, this process suffers from the problem of slow speed. In contrast with laser scanning, projection based process can form the whole layer in one exposure, which leads to higher fabrication efficiency. However, due to the limited resolution of projection device and various optical defects, the surface quality will be significantly deteriorated for large area fabrication. To solve this problem, a novel hybrid process by integrating vector scanning and mask projection has been presented. In this process, laser is focused into a fine spot and used to scan the boundary of the layer, whereas the projector is focused onto a large platform surface and used to form the interior area of the layer. An efficient slicing method is proposed for extracting the contour for laser scanning. A slice to image conversion algorithm is also developed to convert the offset contour to grayscale image for mask projection. Experimental results have verified that the proposed hybrid process can significantly improve the fabrication speed without losing the surface quality.

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Yasa, Evren, Jan Deckers, Jean-Pierre Kruth, Marleen Rombouts und Jan Luyten. „Investigation of Sectoral Scanning in Selective Laser Melting“. In ASME 2010 10th Biennial Conference on Engineering Systems Design and Analysis. ASMEDC, 2010. http://dx.doi.org/10.1115/esda2010-24621.

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Selective laser melting (SLM), a powder metallurgical (PM) additive manufacturing (AM) technology, is able to produce fully functional parts directly from standard metal powders without using any intermediate binders or any additional post-processing steps. During the process, a laser beam selectively scans a powder bed according to the CAD data of the part to be produced and completely melts the powder particles together. Stacking and bonding two-dimensional powder layers in this way, allows production of fully dense parts with any geometrical complexity. The scanning of the powder bed by the laser beam can be achieved in several different ways, one of which is island or sectoral scanning. In this way, the area to be scanned is divided in small square areas (‘sectors’) which are scanned in a random order. This study is carried out to explore the influence of sectoral scanning on density, surface quality, mechanical properties and residual stresses formed during SLM. The experiments are carried out on a machine with an Nd:YAG laser source using AISI 316L stainless steel powder. As a result of this experimental study, it is concluded that sectoral scanning has some advantages such as lower residual stresses and better surface quality. However, the selection of parameters related to sectoral scanning is a critical task since it may cause aligned porosity at the edges between sectors or scanned tracks, which is very undesired in terms of mechanical properties.

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Niewola, Adam, und Leszek Podsedkowski. „A novel 3D laser scanner design for variable density scanning“. In 2019 12th International Workshop on Robot Motion and Control (RoMoCo). IEEE, 2019. http://dx.doi.org/10.1109/romoco.2019.8787369.

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Berichte der Organisationen zum Thema "Laser scannig"

CALIFORNIA UNIV LIVERMORE RADIATION LAB. Scanning Laser Doppler Vibrometer System. Fort Belvoir, VA: Defense Technical Information Center, März 2001. http://dx.doi.org/10.21236/ada395304.

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Jeon, Jun Young, und Eric Brian Flynn. Compressive Sensing Laser Scanning Tech. Office of Scientific and Technical Information (OSTI), März 2016. http://dx.doi.org/10.2172/1241654.

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Saric, William S. Scanning Laser Vibrometer for MEMS Control Devices. Fort Belvoir, VA: Defense Technical Information Center, März 2000. http://dx.doi.org/10.21236/ada375480.

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SCHerbakov, V. V. Laser scanning: Electronic tutorial for accompanying lectures. OFERNIO, Februar 2021. http://dx.doi.org/10.12731/ofernio.2021.24762.

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Brennan, Guendalyn Kendra. Laser Ultrasound Spectroscopy Scanning for 3D Printed Parts. Office of Scientific and Technical Information (OSTI), August 2017. http://dx.doi.org/10.2172/1374286.

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Cheok, Geraldine S., Stefan Leigh und Andrew Rukhin. Calibration experiments of a laser scanner. Gaithersburg, MD: National Institute of Standards and Technology, 2002. http://dx.doi.org/10.6028/nist.ir.6922.

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Augustoni, Arnold L. Laser hazard analysis for various candidate diode lasers associated with the high resolution pulsed scanner. Office of Scientific and Technical Information (OSTI), Oktober 2004. http://dx.doi.org/10.2172/920463.

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Rasmussen, A. L., W. E. Case und A. A. Sanders. Scanning system for measuring uniformity of laser detector response and laser beam dimensions. Gaithersburg, MD: National Institute of Standards and Technology, 1990. http://dx.doi.org/10.6028/nist.ir.90-3937.

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Kwon, Chuhee. Characterizing Coated Conductors with Variable Temperature Scanning Laser Microscopy (SLM). Fort Belvoir, VA: Defense Technical Information Center, September 2008. http://dx.doi.org/10.21236/ada492446.

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Kelly, Alonzo. Concept Design of a Scanning Laser Rangefinder for Autonomous Vehicles. Fort Belvoir, VA: Defense Technical Information Center, Mai 1994. http://dx.doi.org/10.21236/ada283007.

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