Xem 1-14 trên 14 kết quả Laser scanning
  • Tham khảo sách 'laser scanning, theory and applications_1', kỹ thuật - công nghệ, điện - điện tử phục vụ nhu cầu học tập, nghiên cứu và làm việc hiệu quả

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  • Ever since the invention of laser by Schawlow and Townes in 1958, various innovative ideas of laser-based applications emerge very year. At the same time, scientists and engineers keep on improving laser's power density, size, and cost which patch up the gap between theories and implementations. More importantly, our everyday life is changed and influenced by lasers even though we may not be fully aware of its existence.

    pdf276p cucdai_1 22-10-2012 35 12   Download

  • Laser scanning technology has emerged as a research field in the science and engineering arena. Laser scanning performs a procedure to detect a surface using laser technology. A scanning device analyzes a real-world object to retrieve data on its shape and its appearance. The collected data can then be used to construct a digital three-dimensional model. The aim of the scanning is usually to create a point cloud on an object surface.

    pdf270p qsczaxewd 22-09-2012 29 7   Download

  • many new developments in infrared and Raman instrumentation, such as high sensitive detectors, charge-coupled devices (CCD) and array detectors, laser excitation sources, step-scan technique, photoacoustic detection, spectral depth profiling, light-fiber optics, mapping and imaging in the field of microscopy, time resolved and surface-enhanced methods - in order to mention a few of these significant improvements. Of course this progress in vibrational spectroscopy is closely connected with the enormous development in computer technique.

    pdf184p kinhdo0908 11-10-2012 33 8   Download

  • This book covers a wide range of topics relating to advanced industrial robotics, sensors and automation technologies. Although being highly technical and complex in nature, the papers presented in this book represent some of the latest cutting edge technologies and advancements in industrial robotics technology.

    pdf350p kimngan_1 05-11-2012 21 8   Download

  • Các phương pháp kiểm tra không tiếp xúc kiểu quang học • Có 3 loại: – 1. Machine vision – 2. Thiết bị quét chùm tia laser (Scanning laser beam devices) – 3. Photogrammetry – Cả 3 đều dùng cảm biến quang học hay vật liệu cảm quang. Những hệ thống cảm biến quang học đơn giản dùng photocells, photodiodes, photographic paper.

    pdf29p online_12 08-11-2013 32 5   Download

  • Tham khảo sách 'industrial roboticsprogramming, simulation and applications_1', kỹ thuật - công nghệ, cơ khí - chế tạo máy phục vụ nhu cầu học tập, nghiên cứu và làm việc hiệu quả

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  • In the eight years since publication of the first edition, enormous progress has been made in the field of skin imaging and analysis. Because of the broad array of new methods now available to the research scientist—and more and more to the clinically- oriented dermatologist—we were able to widen the scope of this book from the skin surface to the entire skin. This is also reflected in the change of the volume title, Bioengineering of the Skin: Skin Imaging and Analysis. Hence, this second edition is a major revision of the first edition, with more than 30 new chapters added....

    pdf542p hyperion75 18-01-2013 14 4   Download

  • The aim of this study was to analyse the thickness of the retinal nerve fibre layer (RNFL) of pulmonary tuberculosis patients on ethambutol and isoniazid. Materials and Methods: This was a prospective cohort study where patients with newly diagnosed pulmonary tuberculosis requiring chemotherapy, including ethambutol and isoniazid, were imaged using scanning laser polarimetry. Their mean baseline RNFL thickness and various scanning laser polarimetry parameters of both eyes were measured 2 weeks after the commencement of chemotherapy.

    pdf5p taisaocothedung 12-01-2013 14 1   Download

  • The uptake by mammalian cells of phosphorothioate oli-gonucleotides was compared with that of their respective complexes or conjugates with cationic, cell-penetrating model peptides of varying helix-forming propensity and amphipathicity. An HPLC-based protocol for the synthesis and purification of disulfide bridged conjugates in the 10– 100 nmol range was developed. Confocal laser scanning microscopy (CLSM) in combination with gel-capillary electrophoresis and laser induced fluorescence detection (GCE-LIF) revealed cytoplasmic and nuclear accumula-tion in all cases. ...

    pdf8p research12 23-04-2013 18 1   Download

  • Alubaidy et al. Nanoscale Research Letters 2011, 6:375 http://www.nanoscalereslett.com/content/6/1/375 NANO EXPRESS Open Access Synthesis of magnetic nanofibers using femtosecond laser material processing in air Mohammed-Amin Alubaidy1, Krishnan Venkatakrishnan1* and Bo Tan2 Abstract In this study, we report formation of weblike fibrous nanostructure and nanoparticles of magnetic neodymiumiron-boron (NdFeB) via femtosecond laser radiation at MHz pulse repetition frequency in air at atmospheric pressure.

    pdf7p dauphong13 09-02-2012 15 4   Download

  • The stereolithographic (SL) process is performed on the equipment shown in Figure 1. The movable platform on which the 3D model is formed is initially immersed in a vat of liquid photopolymer resin to a level just below its surface so that a thin layer of the resin covers it. The SL equipment is located in a sealed chamber to prevent the escape of fumes from the resin vat. The resin changes from a liquid to a solid when exposed to the ultra- violet (UV) light from a low-power, highly focused laser.

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  • The goal of our research is to develop an autonomous robot for subsurface mapping. We are motivated by the growing need for mapping buried pipes, hazardous waste, landmines and other buried objects. Most of these are large scale mapping problems, and to manually construct subsurface maps in these cases would require a significant amount of resources. Therefore, automating the subsurface mapping process is an important factor in alleviating these problems. To achieve our goal, we have developed a robotic system that can autonomously gather and process Ground Penetrating Radar (GPR) data.

    pdf0p khangoc2393 13-08-2012 17 1   Download

  • Because the photopolymer used in the SL process tends to curl or sag as it cures, models with overhangs or unsupported horizontal sections must be reinforced with supporting structures: walls, gussets, or columns. Without support, parts of the model can sag or break off before the polymer has fully set. Provision for forming these supports is included in the digitized fabrication data. Each scan of the laser forms support layers where necessary while forming the layers of the model.

    pdf119p loixinloi 08-05-2013 14 1   Download

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