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Добірка наукової літератури з теми "Laser scanning technique"

Автор: Grafiati

Опубліковано: 10 березня 2023

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Статті в журналах з теми "Laser scanning technique"

1

MacFarlane, D. L., W. Y. Kim, J. S. Nilvi, T. Nuth, and V. Tan. "Novel two-dimensional laser scanning technique." Optics and Lasers in Engineering 17, no. 1 (January 1992): 1–8. http://dx.doi.org/10.1016/0143-8166(92)90022-y.

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Altyntsev, Maxim A., and Hamid Majid Saber Karkokli. "TECHNIQUE OF AUTOMATIC MOBILE LASER SCANNING DATA FILTERING." Vestnik SSUGT (Siberian State University of Geosystems and Technologies) 26, no. 3 (2021): 5–19. http://dx.doi.org/10.33764/2411-1759-2021-26-3-5-19.

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The result of laser scanning is an array of laser points. The generation of a single point cloud in a given coordinate system is carried out during the registration process at the stage of preliminary field data processing. At this stage it is also often necessary to filter the data. Laser points with an erroneous position are eliminated during the data filleting. The number of erroneous laser points is determined by the of the laser scanner characteristics, surveyed area peculiarities and weather conditions. The devel-opment of methods and algorithms for filtering laser scanning data is carried out based on the analysis of the laser point spatial position and a certain set of additional characteristics, such as intensity value, echo signal, color value. The technique of mobile laser scanning data filtering for the territory of the road passing among the forest and close to individual industrial facilities and building. The main goal of the proposed filtration technique is to obtain data for automatic generation of an accurate digital terrain model. The filtration technique was developed for data acquired under the least favorable con-ditions – in wet weather. Accuracy estimation of generating digital terrain model based on filtered data was carried out.

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3

Gulino, Michelangelo-Santo, Mara Bruzzi, and Dario Vangi. "Line Scanning with Gas-Coupled Laser Acoustic Detection." Journal of Physics: Conference Series 2293, no. 1 (June 1, 2022): 012009. http://dx.doi.org/10.1088/1742-6596/2293/1/012009.

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Abstract The Gas-Coupled Laser Acoustic Detection (GCLAD) is an optical technique for ultrasonic detection based on the deviation that a laser beam sustains when travelling in a fluid that features refractive index fluctuations. If the laser beam is perpendicular to the wave propagation direction, the technique enables simultaneous detection of direct waves in mechanical components and eventual echoes from defects to be achieved. The technique is applied to the inspection of elements predominantly extending in one/two dimensions as bars and axisymmetric pieces, exploiting a signal enhancement effect occurring in defects’ proximity. The phenomenon, namely constructive interference between wave crests of a direct Rayleigh ultrasound and those associated with reflections on a defect flank, is first illustrated numerically. The effect of parameters like the angle between wave propagation direction and source-receiver distance on the GCLAD sensitivity is then experimentally highlighted. The technique is finally implemented to B-scan a steel plate with 1 mm wide, 20 mm long, and 3 mm deep surface defects. Since the GCLAD probe laser beam insists on an entire line, defects present on that line can be identified without moving the device along such direction. This reduces the monitoring time compared to techniques leveraging on traditional air-coupled transducers or more sophisticated methods (Scanning Laser Source).

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4

Altyntsev, Maxim A., and Karkokli Hamid Majid Saber. "TECHNIQUE OF AUTOMATIC MOBILE LASER SCANNING DATA ADJUSTMENT." Vestnik SSUGT (Siberian State University of Geosystems and Technologies) 26, no. 4 (2021): 5–23. http://dx.doi.org/10.33764/2411-1759-2021-26-4-5-23.

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Adjustment is a main step in the preliminary processing of mobile laser scanning (MLS) data. As a result of this step, a point cloud is generated in a certain coordinate system. The modern software, provided with the corresponding surveying system, is capable of performing in automatic mode most stages of MLS data adjustment obtained for territories with different quantity of buildings. With a suf-ficient number of vertically arranged planar objects, such as building walls, the algorithms embedded in the software provide a high accuracy of relative adjustment, which consists in calculating and ap-plying corrections for trajectories obtained with re-scanning the same area. Absolute adjustment can also be carried out automatically, subject to the rules for placing control points in order to automatically detect them. This kind of adjustment involves transforming a point cloud with using control point coordinates measured with more accurate surveying methods. The accuracy of automatic relative adjustment can be significantly reduced with the almost complete absence of vertical flat objects. In this case, it is necessary to develop additional adjustment techniques capable of using not only flat objects of a large area, but also vertical objects, such as road signs and poles. Comprehensive technique of MLS data adjustment, which can use information on the position of road signs and poles for territories with an insufficient number of vertical flat objects is proposed. The accuracy estimation of both the relative and absolute MLS data adjustment according to the proposed technique was carried out. The choice of the required control point density for territories with different quantity of buildings is explained.

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5

Nguyen Tien Thanh, Nguyen Tien Thanh, 刘修国 Liu Xiuguo, 王红平 Wang Hongping, 于明旭 Yu Mingxu, and 周文浩 Zhou Wenhao. "3D Model Reconstruction Based on Laser Scanning Technique." Laser & Optoelectronics Progress 48, no. 8 (2011): 081201. http://dx.doi.org/10.3788/lop48.081201.

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Fuad, N. A., A. R. Yusoff, M. P. M. Zam, A. Aspuri, M. F. Salleh, Z. Ismail, M. A. Abbas, M. F. M. Ariff, K. M. Idris, and Z. Majid. "EVALUATING MOBILE LASER SCANNING FOR LANDSLIDE MONITORING." ISPRS - International Archives of the Photogrammetry, Remote Sensing and Spatial Information Sciences XLII-3/W4 (March 6, 2018): 211–19. http://dx.doi.org/10.5194/isprs-archives-xlii-3-w4-211-2018.

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<p><strong>Abstract.</strong> Landslide is one of the natural disasters that give a huge impact to human life and social-economic development. Landslide needs to be monitored periodically in order to avoid loss of human life and damages of properties. Various methods have been used for monitoring landslide. This aim of the research is to evaluate the potential of mobile laser scanning technique for monitoring of landslide area. The objectives of the research are to acquire three-dimensional surface data of landslide area in different epochs and to analyze the movement of the landslide area using three-dimensional surface deviation and ground surveying techniques. The methodology begins with the GPS survey for the establishment of ground control points for the project area. The total station survey was then carried out to measure the three-dimensional coordinates of twenty well distributed targets located at the project area. The data collection phase was then continuing with the mobile laser scanning survey. The processing of the two epochs data acquired from both techniques was then carried out simultaneously and the methodology concluded with the output comparison analysis for the movement detection of the land slip. The finding shows that the mobile laser scanning provides fast and accurate data acquisition technique of the landslide surface. The surface deviation analysis of the two epochs laser scanning data was capable to detect the movement occurred in the project area. The results were successfully evaluated using the changes of the three-dimensional coordinates of the targets from the two epoch’s ground surveying data.</p>

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7

Uotila, Ulrika, Arto Saari, and Juha-Matti Junnonen. "Investigating the barriers to laser scanning implementation in building refurbishment." Journal of Information Technology in Construction 26 (May 27, 2021): 249–62. http://dx.doi.org/10.36680/j.itcon.2021.014.

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The use of the laser scanning technique has increased rapidly in the field of built environment, mainly because it produces highly accurate as-built data. However, the full potential of this technique is utilised only limitedly in building refurbishment projects. This research aims to investigate the barriers to the implementation of laser scanning in building refurbishment projects in Finland. Qualitative interviews were carried out to identify these barriers, and furthermore, to explore the current usage of the technique in building refurbishments. The study shows that many obstacles to implementations are related to challenges in laser scanning procurement, including a low level of competence in acquisition, limitations of the laser scanning technique in building refurbishments, and limitations and challenges in utilising the data in design work. This study is beneficial for building owners and practitioners as it presents the challenges and advantages that laser scanning can provide a refurbishment project. In addition, it offers suggestions to improve the early phase of a refurbishment project in order to achieve greater benefits with laser scanning. Furthermore, the findings may be utilised in the procurement process of laser scanning services in such projects, and the results may potentially solve practical challenges encountered in laser scanning work.

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Weber, Klaus, Alexander Waletzky, Diana Fendl, Patricia Ordóñez, Pradeep Takawale, Felix Hein, Wolfram Riedel, et al. "New Method for Sperm Evaluation by 3-Dimensional Laser Scanning Microscopy in Different Laboratory Animal Species." International Journal of Toxicology 33, no. 5 (August 12, 2014): 353–61. http://dx.doi.org/10.1177/1091581814545243.

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Sperm analysis is one of the end points in reproductive toxicology studies. Different methods for quantitative sperm analysis have been described. For qualitative morphological sperm analysis, either such techniques or smears of sperm and histological sperm staging are in use. Any of these methods provides morphological results on a light microscopy level. Laser scanning microscopy is a technique using a focused laser for scanning an object. The Olympus 3D Laser Scanning Microscope LEXT OLS4000 with optional possibilities of differential interference contrast provides a microscopic method for visualizing microasperities, which are far beyond the resolving power of a typical light or laser microscope. This technique was applied to sperm of mice, rats, rabbits, and cynomolgus monkeys at magnifications up to ×17 090. The obtained images are comparable to those of a scanning electron microscope under relatively low-power magnifications. Measurements on sperm parameters were taken by an integrated image analysis software tool. Abnormalities were easily detectable.

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9

Cheng, P. C., S. J. Pan, A. Shih, W. S. Liou, M. S. Park, T. Watson, J. Bhawalkar, and P. Prasard. "Two-Photon Laser Scanning Confocal Microscopy." Microscopy and Microanalysis 3, S2 (August 1997): 847–48. http://dx.doi.org/10.1017/s1431927600011120.

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Two-photon fluorescence microscopy has become an important research tool in both biological and material sciences. The technique uses long wavelength, typically in the near IR, as the excitation light to obtain shorter wavelength fluorescence (e.g. visible light). Because of the low linear absorption coefficient of most biological and polymeric specimens, this technique allows deeper penetration of the excitation beam, achieving optical sectioning to a depth of 250μm or more into the specimen. As a result of the quadratic dependency of the two-photon induced fluorescence to the excitation intensity, the fluorescent emission and photobleaching are limited to the vicinity of focal spot. This capability of addressing a specimen’s 3D space allows exciting possibilities in biological researches, such as 3D photobleaching recovery experiment.Two-photon confocal fluorescence microscopy is ideal for the study of thick biological and material specimen in 3D. For example, Figure 1 shows a three-dimensional isosurface rendered image of a vascular bundle from a maize stem.

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Samiei, Mohammad, Seyyed Mahdi Vahid Pakdel, Sahand Rikhtegaran, Sahar Shakoei, Delaram Ebrahimpour, and Pedram Taghavi. "Scanning Electron Microscopy Comparison of the Cleaning Efficacy of a Root Canal System by Nd:YAG Laser and Rotary Instruments." Microscopy and Microanalysis 20, no. 4 (June 2, 2014): 1240–45. http://dx.doi.org/10.1017/s1431927614000981.

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AbstractThis study evaluated the cleaning efficacy of a root canal system by Nd:YAG laser and rotary instruments. Sixty single-rooted human teeth were divided into four experimental groups (n=15). In the first group the teeth were prepared with a step-back technique using conventional K-files. In the second and third groups, tooth preparation was carried out using Nd:YAG laser and rotary NiTi instruments, respectively. Teeth in the fourth group were prepared by combined laser and rotary methods. The smear layer remaining on canal walls was then assessed by scanning electron microscopy in the coronal, middle, and apical portions. The comparison of smear layer removal efficacy between groups was carried out by Kruskal–Wallis and Mann–Whitney U tests. The mean grades of smear layer removal in rotary-laser, rotary, laser and step-back techniques were 1.34±0.18, 2.2±0.28, 1.91±0.25, and 2.42 ±0.19, respectively. On the whole, differences between rotary-laser and rotary groups, step-back, and the three other techniques (rotary, laser, and rotary-laser) were significant at p=0.034. Based on the findings of this study, the cleaning efficacy of rotary, laser, and rotary-laser techniques were better than the step-back technique and the combined laser and rotary technique was the most efficient method.

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Дисертації з теми "Laser scanning technique"

1

Tam, Chung-yan Candy. "Study of rock joint roughness using 3D laser scanning technique." Click to view the E-thesis via HKUTO, 2008. http://sunzi.lib.hku.hk/hkuto/record/b40203487.

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2

Tam, Chung-yan Candy, and 譚頌欣. "Study of rock joint roughness using 3D laser scanning technique." Thesis, The University of Hong Kong (Pokfulam, Hong Kong), 2008. http://hub.hku.hk/bib/B40203487.

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3

Yahyavi, Zanjani Matin, Henning Zeidler, André Martin, and Andreas Schubert. "Application of Laser Scanning as a Pre-machining metrology technique in Jet-ECM." Universitätsbibliothek Chemnitz, 2017. http://nbn-resolving.de/urn:nbn:de:bsz:ch1-qucosa-227104.

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In Electrochemical Machining (ECM), where the material removal takes place based on the anodic dissolution of the workpiece material, the working distance is one of the most important parameters. Especially in Jet Electrochemical Machining (Jet-ECM), where a micro nozzle is moved over the initial surface of the workpiece in order to apply an electrolytic free jet to produce the desired shapes, the distance between the nozzle and the workpiece becomes even more important. On the one hand a small working distance is aspired to achieve high current densities resulting in a high efficiency of the process. On the other hand the working distance needs to be large enough to avoid damages on the micro nozzle caused by electrical discharges or mechanical contact. Hence, the adjustment of the working gap is essential to realize a precise, effective and secure Jet-ECM process. The control of the gap size is done based on the data gathered before machining by surface measurement. Until now, the initial surface has been detected by electrostatic probing through moving the nozzle stepwise to the work piece surface and detect the voltage drop between the nozzle and the work piece. With this strategy, only a limited number of points can be detected within adequate time. Hence, in most cases only three points of the initial surface are detected in order to adjust the working distance according to the planar inclination of the workpiece. The coordinates of the three detected points are used to calculate the normal vector of the initial surface. In recent studies, another strategy was analysed, which is realized by dividing the surface into smaller areas and respectively calculating the normal vector of each area in order to obtain more accurate data of the initial surface. A further strategy is to use probing along the machining path of the tool and to gather the coordinates of a number of points along the path. The above mentioned methods usually do not ensure the precise control of the gap size especially for the surfaces with complex geometry with locally confined convex and concave shapes and are highly affected by the size of the probe. In this study, the application of a laser scanner is investigated for the measurement of the workpiece surface before machining to gather the required data for the adjustment of the working distance during Jet-EC machining of complicated surfaces.

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4

Favey, Etienne. "Investigation and improvement of airborne laser scanning technique for monitoring surface elevation changes of glaciers /." Zürich, 2000. http://e-collection.ethbib.ethz.ch/show?type=diss&nr=14045.

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5

Yildiz, Bilge Can. "Imaging Of Metal Surfaces Using Confocal Laser Scanning Microscopy." Master's thesis, METU, 2011. http://etd.lib.metu.edu.tr/upload/12613641/index.pdf.

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Optical imaging techniques have improved much over the last fifty years since the invention of the laser. With a high brightness source many imaging applications which were once inaccessible to researchers have now become a reality. Among these techniques, the most beneficial one is the use of lasers for both wide-field and confocal imaging systems. The aim of this study was to design a laser imaging system based on the concept of laser scanning confocal microscopy. Specifically the optical system was based on optical fibers allowing the user to image remote areas such as the inner surface of rifled gun barrels and/or pipes with a high degree of precision (+/- 0.01 mm). In order to build such a system, initially the theoretical foundation for a confocal as well as a wide-field imaging system was analyzed. Using this basis a free-space optical confocal system was built and analyzed. The measurements support the fact that both the objective numerical aperture and pinhole size play an important role in the radial and axial resolution of the system as well as the quality of the images obtained. To begin construction of a confocal, optical-fiber based imaging system first an all fiber wide-field imaging system was designed and tested at a working wavelength of 1550 nm. Then an all fiber confocal system was designed at a working wavelength of 808 nm. In both cases results showed that while lateral resolution was adequate, axial resolution suffered since it was found that the design of the optical system needs to take into account under-filling of the objective lens, a result common with the use of laser beams whose divergence is not at all like that of a point source. The work done here will aid technology that will be used in the elimination process of faulty rifling fabrication in defense industry. The reason why the confocal technique is preferred to the conventional wide-field one is the need for better resolution in all directions. Theoretical concepts and mathematical background are discussed as well as the experimental results and the practical advantages of such a system.

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Barnier, Fabien. "Fibre Bragg grating techniques." Thesis, University of Hull, 2000. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.322570.

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Liu, Yan. "Comparison of tactile probe CMM and laser scanning techniques for reverse engineering." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 1997. http://www.collectionscanada.ca/obj/s4/f2/dsk2/ftp01/MQ30955.pdf.

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8

Monte, Jamie Marie, and Jamie Marie Monte. "ROCK MASS CHARACTERIZATION USING LASER SCANNING AND DIGITAL IMAGING DATA COLLECTION TECHNIQUES." Thesis, The University of Arizona, 2004. http://hdl.handle.net/10150/621370.

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The primary focus of this research is to evaluate whether laser scanning and digital imaging can provide a reliable means to collect essential rock mass data. Simulated and field case studies were conducted to determine if fracture orientation data (dip angle and dip direction) can be accurately estimated from a laser generated three - dimensional point cloud. Orientations measured with a Brunton Compass were compared to values derived from point clouds. The difference in dip direction was within three degrees and as high as twelve degrees for the dip angle. When fracture sets were estimated for both field and laser data, good correlation in mean set orientation and set distribution was observed. Some sets recorded during field mapping were absent in stereo plots of laser derived data due to a shadow zone created during scanning. This indicated that scanning from multiple locations is necessary to reduce potentially missed data. This thesis also investigated whether the newly proposed Digital Rock Mass Rating (DRMR) system could classify rock masses similar to established systems such as the Geological Strength Index (GSI). The seven DRMR parameters, fracture spacing, length, large -scale roughness, block volume, rock bridge percent, and rock mass texture were calculated for images of poor to good rock masses. When DRMR values were compared to GSI ratings estimated during field work, good correlation was seen for good quality rock masses (GSI between 40 and 60). The DRMR overestimated ratings for outcrops with GSI values less than 40, indicating that the rating system may not be applicable for poor quality rock masses. Additional case studies are needed to further validate the DRMR classification system.

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Doukoglou, Tilemachos D. "Non-parametric system identification techniques for numerical deconvolution of scanning laser microscope images." Thesis, McGill University, 1988. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=61889.

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Meadway, Alexander. "Combinations of techniques for the advancement of scanning laser ophthalmology and optical coherence tomography." Thesis, University of Kent, 2013. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.653049.

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In this thesis methods of eye imaging are investigated, primarily optical coherence tomography (OCT) and scanning laser ophthalmology (SLO). These are two well established technologies. This thesis investigates the combination of techniques to improve resolution, sensitivity and the amount of information that can be extracted from a device. There are three systems presented in the thesis. The first generates on-axis and off axis confocal retinal images simultaneously by way of a drilled mirror. Off-axis imaging provides greater depth penetration, but at the cost of resolution. The second system combines three technologies; SLO, time domain (TD) OCT and adaptive optics (AO). The system is able to generate simultaneous en-face SLO and OCT images, whilst the AO closed loop corrects for aberrations enhancing the intensity and resolution of the images in both modes. This system is used in several investigative directions; the effect of deformable mirror dynamics on the acquired image; the OCT channel is used to investigate the confocal profile; the performance of the deformable mirror with regards to its focus control is investigated; the focus control is used to generate 3D confocal images. Finally, the system is converted to a balanced Fourier domain (FD) OCT system. It has previously been assumed that excess photon noise (that balanced detection is used to remove) is not significant due to the limitations of the CCD camera used in an FD system's spectrometers, however, CCD cameras have since been developed, with increased depths of quantum wells and balanced detection offers other advantages, such as the removal of auto correlation terms from an image. The third system investigated is a TD-OCT system that spectrally separates the broadband source into discrete channels at detection. It can be viewed as a hybrid system, combining TD and FD OCT. A system such as this may be used to reduce the shot noise of a time domain system, or it may be used to make spectroscopic measurements. Both are investigated in this thesis, dispersion was measured as well as absorption profiles and a preliminary investigation into the noise reduction is also presented.

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Книги з теми "Laser scanning technique"

1

V, Edwards Robert, and United States. National Aeronautics and Space Administration., eds. A vector scanning processing technique for pulsed laser velocimetry. [Washington, DC]: National Aeronautics and Space Administration, 1989.

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2

Favey, Etienne. Investigation and improvement of Airborne Laser Scanning technique for monitoring surface elevation changes of glaciers. Zurich: Institut für Geodäsie und Photogrammetrie, Eidgenossische Technische Hochschule Zürich, 2001.

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3

Favey, Etienne. Investigation and improvement of Airborne Laser Scanning technique for monitoring surface elevation changes of glaciers. Zurich: Institut für Geodäsie und Photogrammetrie, Eidgenossische Technische Hochschule Zürich, 2001.

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4

F, Marshall Gerald, ed. Handbook of optical and laser scanning. New York: Marcel Dekker, 2004.

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5

Brandt, Roland, and Lidia Bakota. Laser scanning microscopy and quantitative image analysis of neuronal tissue. New York: Humana Press, 2014.

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6

author, Yamada Takahiro, ed. Rēza sukyana ni yoru renji gazō shori: Laser scanner range image processing. Tōkyō-to Chiyoda-ku: Tōkyō Denki Daigaku Shuppankyoku, 2013.

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7

Guthoff, Rudolf. Atlas of confocal laser scanning in-vivo microscopy in opthalmology [i.e. ophthalmology]: Principles and applications in diagnostic and therapeutic ophtalmology [i.e. ophthalmology]. Berlin: Springer, 2006.

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8

Riveiro, Belén, and Roderik Lindenbergh. Laser Scanning. Taylor & Francis Group, 2019.

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9

Laser Scanning: An Emerging Technology in Structural Engineering. Taylor & Francis Group, 2019.

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10

Riveiro, Belén, and Roderik Lindenbergh. Laser Scanning: An Emerging Technology in Structural Engineering. Taylor & Francis Group, 2019.

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Частини книг з теми "Laser scanning technique"

1

Gura, Dmitry A., Marina V. Kuzyakina, Ivan G. Markovskii, and Marina V. Bykova. "Software Data Processing Laser Scanning Technique." In Lecture Notes in Networks and Systems, 572–80. Cham: Springer International Publishing, 2021. http://dx.doi.org/10.1007/978-3-030-80485-5_67.

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Kromine, A. K., P. A. Fomitchov, S. Krishnaswamy, and J. D. Achenbach. "Scanning Laser Source Technique and its Application to Turbine Disk Inspection." In Review of Progress in Quantitative Nondestructive Evaluation, 381–86. Boston, MA: Springer US, 1999. http://dx.doi.org/10.1007/978-1-4615-4791-4_47.

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3

Guezennec, Yann G., Zhao Yang, and Thomas J. Gieseke. "High-Speed 3-D Scanning Particle Image Velocimetry (3-D SPIV) Technique." In Developments in Laser Techniques and Applications to Fluid Mechanics, 392–407. Berlin, Heidelberg: Springer Berlin Heidelberg, 1996. http://dx.doi.org/10.1007/978-3-642-79965-5_26.

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4

Slob, Siefko, and Robert Hack. "3D Terrestrial Laser Scanning as a New Field Measurement and Monitoring Technique." In Engineering Geology for Infrastructure Planning in Europe, 179–89. Berlin, Heidelberg: Springer Berlin Heidelberg, 2004. http://dx.doi.org/10.1007/978-3-540-39918-6_22.

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5

Armerding, W., A. Herbert, M. Spiekermann, J. Walter, and F. J. Comes. "Fast Scanning Laser DOAS, an Ultrasensitive Technique for Monitoring Tropospheric Trace Gases." In Monitoring of Gaseous Pollutants by Tunable Diode Lasers, 283–90. Dordrecht: Springer Netherlands, 1992. http://dx.doi.org/10.1007/978-94-011-2763-9_41.

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6

Baek, Seung-Hae, and Soon-Yong Park. "A 3-D Tube Scanning Technique Based on Axis and Center Alignment of Multi-laser Triangulation." In Advanced Concepts for Intelligent Vision Systems, 724–35. Berlin, Heidelberg: Springer Berlin Heidelberg, 2011. http://dx.doi.org/10.1007/978-3-642-23687-7_65.

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7

Pozarowski, Piotr, Elena Holden, and Zbigniew Darzynkiewicz. "Laser Scanning Cytometry." In Cell Imaging Techniques, 165–92. Totowa, NJ: Humana Press, 2006. http://dx.doi.org/10.1007/978-1-59259-993-6_8.

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8

Stolz, Carina Mariane, and Angela Borges Masuero. "Analysis of Main Parameters that Affect Contact Area Between Mortar Rendering and Substrate: Use of 3D Laser Scanning Technique." In Recent Developments in Building Diagnosis Techniques, 21–35. Singapore: Springer Singapore, 2016. http://dx.doi.org/10.1007/978-981-10-0466-7_2.

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9

Webb, Robert H. "Scanning Laser Ophthalmoscope." In Noninvasive Diagnostic Techniques in Ophthalmology, 438–50. New York, NY: Springer New York, 1990. http://dx.doi.org/10.1007/978-1-4613-8896-8_22.

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10

Yan, Gang, Chen Yin Ni, Yi Fei Shi, Zhong Hua Shen, Jian Lu, and Xiao Wu Ni. "Experimental Study on the Detection of Surface-Breaking Defects on Metal with the Scanning Laser Line Source Technique." In Optics Design and Precision Manufacturing Technologies, 1117–22. Stafa: Trans Tech Publications Ltd., 2007. http://dx.doi.org/10.4028/0-87849-458-8.1117.

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Тези доповідей конференцій з теми "Laser scanning technique"

1

Liu, Bo, Ling Yang, and Jian Zhang. "Laser scanning technique for 3D measurement." In Lasers and Materials in Industry and Opto-Contact Workshop, edited by Pierre Galarneau. SPIE, 1998. http://dx.doi.org/10.1117/12.326623.

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2

Markov, Vladimir B., Benjamin D. Buckner, and J. C. Earthman. "Laser scanning technique for fatigue damage evolution detection." In Merida - DL Tentative, edited by R. Rodriguez-Vera and F. Mendoza-Santoyo. SPIE, 2005. http://dx.doi.org/10.1117/12.611746.

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3

Hayashi, T., M. Murase, T. Kitayama, Donald O. Thompson, and Dale E. Chimenti. "DEFECT IMAGING TECHNIQUE USING A SCANNING LASER SOURCE." In REVIEW OF PROGRESS IN QUANTITATIVE NONDESTRUCTIVE EVALUATION: Volume 30A; Volume 30B. AIP, 2011. http://dx.doi.org/10.1063/1.3591919.

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4

JEON, JUN YOUNG, SEONG JIN IM, GYUHAE PARK, TO KANG, and SOONWOO HAN. "An Integrated Ultrasonic Imaging Technique using Laser Scanning System." In Structural Health Monitoring 2019. Lancaster, PA: DEStech Publications, Inc., 2019. http://dx.doi.org/10.12783/shm2019/32184.

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5

Roy, M., P. Manson, E. D. Thorvaldson, E. G. Atkinson, and M. J. Ballico. "Aperture area metrology using confocal laser beam scanning technique." In 2011 International Quantum Electronics Conference (IQEC) and Conference on Lasers and Electro-Optics (CLEO) Pacific Rim. IEEE, 2011. http://dx.doi.org/10.1109/iqec-cleo.2011.6193962.

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6

Parker, Donald L. "Low-cost laser scanning technique for CMOS latchup detection." In Microelectronic Manufacturing, edited by Jagdish P. Mathur, John K. Lowell, and Ray T. Chen. SPIE, 1994. http://dx.doi.org/10.1117/12.186650.

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7

Sohn, Y. "Scanning Laser Line Source Technique Using Monopolar Rayleigh Waves." In QUANTITATIVE NONDESTRUCTIVE EVALUATION. AIP, 2004. http://dx.doi.org/10.1063/1.1711635.

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8

Ho, W., J. Sercel, P. Sercel, and T. O'Keeffe. "New technique of excimer laser marking and micromachining." In OSA Annual Meeting. Washington, D.C.: Optica Publishing Group, 1990. http://dx.doi.org/10.1364/oam.1990.tuhh4.

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High-peak power short-wavelength excimer laser radiation has been used for a range of applications. Excimer laser direct write marking and micromachining has become a powerful technique for many important applications. In general, excimer laser processing is divided into three categories: (1) Image marking/micromachining, (2) Surface mask scanning, and (3) Direct write marking/ micromachining. Image marking is a simple method. A pre-designed mask is used to image the laser beam onto the work surface. Image processing is straightforward and a relatively large area can be marked simultaneously. However, the mask and tooling time can be costly. Direct write processing overcomes these difficulties. It uses an imaged laser spot as a pencil tip which is moved across the sample with circular interpolation using a CAD/CAM postprocessor. Advantages of direct write processing are that it reduces localized heating by fast scanning and it is more flexible. It also allows the pulse energy, high repetition rate lasers to be used very effectively. When properly implemented, it also permits high Beam Utilization Factor for small beam energy lasers. Results from this direct write processing of various materials and beam delivery techniques will be reported.

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9

Sasaki, Keiji, Masanori Koshioka, Hiroaki Misawa, Noboru Kitamura, and Hiroshi Masuhara. "Laser scanning micromanipulation of fine particles." In OSA Annual Meeting. Washington, D.C.: Optica Publishing Group, 1991. http://dx.doi.org/10.1364/oam.1991.wl1.

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A laser trapping technique is a powerful tool for manipulating single or plural particle(s). Bums et al. recently demonstrated that lattice structures of latex particles could be created on interference patterns of several laser beams.1 Also, we showed that particles were aligned in concentric circles or a line image of a single trapping beam, and demonstrated size-selective trapping of particles.2 The spatial patterning by these methods is, however, essentially based on the interference, so that there are severe limitations in forming arbitrary patterns. In this paper, we propose a laser scanning micromanipulation technique to produce any spatial patterns of fine particles. The principal key to the technique is repetitive scanning of a focused laser beam by computer-controlled galvano mirrors. If the repetition rate is faster than the time-scale of the Brownian motion, plural particles are trapped along a locus of the scanning spot. In addition to the pattern formation, the trapped particles can be moved continuously along the formed patterns, and the flow velocity is controlled by scanning speed and laser power.

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XIE, Ji-jiang, Fei GAO, Qi-kun PAN, Gui-long YANG, Chun-lei SHAO, Lai-ming ZHANG, and Jing GUO. "Laser mask micromachining system based on beam-scanning widening technique." In CIOMP-OSA Summer Session: Lasers and Their Applications. Washington, D.C.: OSA, 2011. http://dx.doi.org/10.1364/sumsession.2011.tu23.

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Звіти організацій з теми "Laser scanning technique"

1

Schulz, Mark J., and P. F. Pai. New Techniques in Experimental Structural Dynamics Using a Scanning Laser Vibrometer. Fort Belvoir, VA: Defense Technical Information Center, June 1998. http://dx.doi.org/10.21236/ada350957.

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2

Schulz, Mark J., and P. F. Pai. New Techniques in Experimental Structural Dynamics Using a Scanning Laser Vibrometer. Fort Belvoir, VA: Defense Technical Information Center, July 1998. http://dx.doi.org/10.21236/ada358509.

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3

Tan, Li, Qiong Liu, Yun Chen, Ya-Qiong Zhao, Jie Zhao, Marie Aimee Dusenge, Yao Feng, et al. Efficacy of sonic activation techniques on tubular dentin sealer penetration：A systematic review and meta-analysis. INPLASY - International Platform of Registered Systematic Review and Meta-analysis Protocols, July 2022. http://dx.doi.org/10.37766/inplasy2022.7.0116.

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Анотація:

Review question / Objective: Is sonic activation techniques more effective than conventional needle irrigation for the tubular dentin sealer penetration. The included study was a randomized controlled trial. Eligibility criteria: A comprehensive search was conducted for all published studies evaluating efficacy of percentage and maximum depth of sealer penetration, following the use of SI and standardized irrigants (NaOCl and EDTA). Because this can hardly be measured clinically, only confocal laser scanning microscopy (CLSM) studies were selected owing to wide use of this methodology for evaluating tubular dentin sealer penetration. The studies using previously filled roots or animal teeth, artificial debris, and plastic blocks, and studies measuring the penetration of tubular dentin sealers in lateral root canals, isthmus, or artificial grooves were excluded to maintain the standardized sample selecting and measuring (Virdee et al. 2018). The search was limited to articles published between January 2000 and June 2022 to ensure conclusions were drawn from contemporary data. There are no language restrictions on filtering articles to ensure the integrity of included data.

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