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three-dimensional imaging lidar system based on high speed pseudorandom modulation and photon counting

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Chinese Optics Letters 2016年第11期14卷 53-57页

作者：张宇飞贺岩杨芳罗远陈卫标 Key Laboratory of Space Laser Communication and Detection Technology Shanghai Institute of Optics and Fine Mechanics Chinese Academy of Sciences Shanghai 201800 China University of Chinese Academy of Sciences Beijing 100049 China School of Electronics and Information Engineer Shanghai University of Electric Power Shanghai 200090 China

High speed pseudorandom modulation and photon counting techniques are applied to a three-dimensional imaging lidar *** specific structure and working principle of the lidar system is *** actual detector efficiency of a single-photon detector in an imaging system is discussed,and the result shows that a variety of reasons lead to the decrease in detection efficiency.A series of ranging and imaging experiments are conducted,and a series of high-resolution three-dimensional images and a distance value of 1200 m of noncooperative targets are acquired.

关键词： Photon counting three-dimensional image acquisition Laser range finder

Use of focus stacking and SfM techniques in the process of registration of a small object hologram

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Chinese Optics Letters 2020年第6期18卷 19-23页

作者： Sławomir Pasko Marek Sutkowski Ramunas Bakanas Institute of Micromechanics and Photonics Warsaw University of Technology02-525 WarsawPoland 2Institute of Microelectronics and OptoelectronicsWarsaw University of Technology00-665 WarsawPoland 3Geola Digital uab.Vilnius 03227Lietuva

In this Letter,a method for shape visualization of small objects(microscopic)in the form of a hologram is *** consists of a standard optical set-up for small object registration(i.e.,stereoscopic or biological microscope).The focus stacking technique is used to obtain a series of images with increased depth of field and on them a shape reconstruction procedure(structure from motion,SfM)is *** use of a dense cloud of points,a sequence of parallax-related images suitable for Geola’s digital holographic printing is *** holographic printer produces single-parallax holographic(full three-dimensional)images of real or virtual objects.

关键词： digital holography three-dimensional image acquisition photography

Real-time three-dimensional infrared imaging using fringe projection profilometry

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Chinese Optics Letters 2013年第14期11卷 47-50页

作者：左超陈钱冯世杰顾国华 Anand Asundi Jiangsu Key Laboratory of Spectral Imaging & Intelligence Sense Nanjing University of Science and Technology Nanjing 210094 China Centre for Optical and Laser Engineering School of Mechanical and Aerospace Engineering Nanyang Technological University Singapore 639798 Singapore Key Laboratory of Photoelectronic Inmging Technology and System Ministry of Education of China Beijing Institute of Technology Beijing 100081 China

Infrared thermography determines the surface temperature of an object or human body. It is a promising imaging technology for medical and biological observations due to its contactless and completely non- invasive properties. However, traditional two-dimensional （2D） infrared thermography cannot retain the spatial information, and thus provides only qualitative diagnosis information. A novel real-time three- dimensional （3D） infrared imaging system which takes full advantages of high-speed, high-quality, high- sensitivity, and low-cost in 3D thermograph is presented. We demonstrate the real-time 3D thermal imaging at the speed of 24 frmnes per second （fps）, with resolution of 640 ×480 points. Experimental results demonstrate quantitatively measurement of temperature distribution of 3D surfaces in real-time is realized with this system.

关键词： 110.0110 Imaging systems 110.3080 Infrared imaging 110.6880 three-dimensional image acquisition

3D imaging by two-color Ewald spheres with optical lasers

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Chinese Optics Letters 2016年第11期14卷 58-61页

作者：张剑范家东张建华黄庆捷江怀东 State Key Laboratory of Crystal Materials Shandong University School of Information Science and Engineering Shandong University School of Physical Science and Technology Shanghai Tech University

3D imaging techniques such as computed tomography,ultrasonography,and magnetic resonance imaging usually combine many scans ***,we report a 3D imaging approach using an optical-laser diffraction microscope with two different wavelength lasers in the same orientation.A double-layered sample constructed of silica spheres is used for coherent diffraction imaging;with two lasers at 543 and 432 *** diffraction patterns obtained using a planar detector at a high numerical a pert are arc projected onto the Ewald spheres.3D images of the double-layered sample are successfully reconstructed from the two-color spherical diffraction patterns.

关键词： Phase retrieval Coherence imaging three-dimensional image acquisition

Optical 3D Shape Measurement for Vibrating Drumhead

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Optical 3D Shape Measurement for Vibrating Drumhead