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Photonics Asia 2004:Information Processing and Data Storage

作者： Zhang Jian*a Ni Guo-qianga Liu Min-qia Cui Xiao-dia Liu Xin-pingb aDept. of Optical Engineering beijing institute of Technology beijing 100081 china bxi’an institute of optics and precision mechanics of cas

Considering the fact that the remote sensing image is mainly captured by a linear CCD with the push-broom way which the image varies over time, the time-varying wavelet packets for image restoration i

关键词： image restoration time-varying wavelet packets DSP parallel C6416

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The Laser Shaft Alignment System with Dual PSDs

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武汉理工大学学报 2006年第S1期28卷 107-111页

作者： JIAO Guohua 1,2 ,LI Yulin1,ZHANG Dongbo3,LI Tonghai1,HU Baowen1 (1.Xian institute of optics and precision mechanics of cas,Xi’an 710068,china 2.Graduate School of the Chinese Academy of Sciences,beijing 100039,china 3.The 16th institute of CATEC,Xi’an 710100,china) Xian institute of optics and precision mechanics of cas Xi'an 710068China Graduate School of the Chinese Academy of Sciences Beijing 100039China Xian institute of optics and precision mechanics of cas Xi'an 710068China The 16th institute of CATEC Xi'an 710100China

Shaft alignment is an important technique during installation and maintenance of a rotating machine. A high-precision laser alignment system has been designed with dual PSDs (Position Sensing Detector) to change traditional manual way of shaft alignment and to make the measurement easier and more accurate. The system is comprised of two small measuring units (laser transmitter and detector) and a PDA (Personal Digital Assistant) with the measurement software. The laser alignment system with dual PSDs was improved on a single PSD system,and it gets higher measurement accuracy than the previous design,and it has been succeeded in designing and implement for actual shaft alignment. In the system,the range of offset measurement is ±4 mm,and the resolution is 1.5 μm,and the accuracy is less than 2 μm.

关键词： rotating machine shaft alignment laser alignment position sensing detector (PSD) laser micro-displac

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The application of underwater optics and its development

The application of underwater optics and its development

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2007亚洲光电子会议信息光学与光子学技术分会场

作者： LV Pei1 ,2, HE Junhua 1, Zhou Renkui1 , Liu Haiying1 ,2 1 Xi’an institute of optics and precision mechanics of cas, Xi’an 710119, china 2 Graduate School of Chinese Academic of Sciences, beijing 100039, china

After concluding the application of under-water optics, the development of under-water laser imaging technology is reviewed. The main types of laser imaging technology are introduced, such as laser scanning imaging, distance selected imaging, and three-dimensional technology. The respective imaging principle, characteristics and update status are presented. Furthermore, the newest detecting technology, such as fiber optic hydrophone, under-water holograph and under-water spectrum detecting technology are described in detail. The recent researching status and new application are included.

关键词： Underwater imaging laser scanning range gated selection polarized laser imaging holography detecting underwater laser communication

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