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• 长春光学精密机械与... [12]

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• OAI收割 [12]

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• 会议论文 [12]

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• 2013 [1]
• 2012 [2]
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浏览/检索结果: 共12条，第1-10条 帮助 限定条件 专题：长春光学精密机械与物理研究所    第一署名单位    第一作者单位    通讯作者单位    内容类型：会议论文     条数/页： 5101520253035404550556065707580859095100 排序方式： 请选择提交时间升序提交时间降序发表日期升序发表日期降序题名升序题名降序作者升序作者降序 Design and analyze of optical system for high-speed three-channel framing camera 会议论文  OAI收割 2013 2nd International Conference on Mechatronics and Control Engineering, ICMCE 2013, August 28, 2013 - August 29, 2013, Dalian, China Liu C. Y.; Xu T. Q.; Xu Z. 收藏  |  浏览/下载：49/0  |  提交时间：2014/05/15 A sub-pixel extraction method for the center of the circular structure from spot array calibration target (EI CONFERENCE) 会议论文  OAI收割 2012 3rd International Conference on Information Technology for Manufacturing Systems, ITMS 2012, September 8, 2012 - September 9, 2012, Qingdao, China 作者:  Liu Y.;  Zhang T.;  Yang H.;  Gao X.;  Liu Y. 收藏  |  浏览/下载：64/0  |  提交时间：2013/03/25 The imaging measurement system must be calibrated before application. In calibration procedure  sub-pixel center extraction is the crucial step for the final accuracy. In this paper  a new sub-pixel extraction method is proposed. Edge detection at pixel level is obtained using LOG operator  then sub-pixel edge detection is realized using the Facet model. Finally  the least squares ellipse fitting is operated on the sub-pixel edge to determine the sub-pixel center. Experiment on a series of simulated images indicates that this algorithm is able to realize the center location accuracy of 0.01-0.02 pixel  and meets the requirement of sub-pixel level. (2012) Trans Tech Publications  Switzerland.   Research on Identification of Moving Targets in Space 会议论文  OAI收割 2012 Xu T. Q.; Zhang G. X.; Xu W.; Jin G. 收藏  |  浏览/下载：5/0  |  提交时间：2013/03/28 High resolution gray-scale modulation method based on linear superposition for LED displays (EI CONFERENCE) 会议论文  OAI收割 2011 International Conference on Control, Automation and Systems Engineering, CASE 2011, July 30, 2011 - July 31, 2011, Singapore, Singapore Feng Y.; Xu X.; Miao C.; Ding T. 收藏  |  浏览/下载：8/0  |  提交时间：2013/03/25 This paper proceeds a new method for gray-scale modulation  has a deep research on weighted linear superposition principle of pulse width sequences  builds a basic equation of scanning drive  analyzes constraint relations between compound modes of pulse sequences and gray-scale resolution  pixel driving efficiency  data shifting clock and refresh rate  etc and optimal methods  and lists parameter optimal values in different scanning ways according to real needs of LED displays  resulting in realization of gray-scale modulation in 14bit to 18 bit resolution. 2011 IEEE.   A nanometer scale alignment method of concentric spherical mirrors based on interferometry (EI CONFERENCE) 会议论文  OAI收割 4th IEEE International Nanoelectronics Conference, INEC 2011, June 21, 2011 - June 24, 2011, Tao-Yuan, Taiwan 作者:  Xu T. 收藏  |  浏览/下载：11/0  |  提交时间：2013/03/25 A nanometer scale alignment method of spherical concentric mirrors based on dual-beam interferometry is proposed  which is also the method to measure the defocus of concentric spherical mirrors. In the process of aligning the concentric spherical mirrors  the defocus can be measured real time with nanometer scale error. The experimental result shows that the method can achieve the defocus of the spherical concentric mirrors several nanometers. 2011 IEEE.   Dynamic Closed-loop Test for Real-time Drift Angle Adjustment of Space Camera on the Earth 会议论文  OAI收割 2010 作者:  Wang D. 收藏  |  浏览/下载：6/0  |  提交时间：2013/03/28 High power VCSEL device with periodic gain active region - art. no. 67820O 会议论文  OAI收割 2007 作者:  Sun Y.;  Wang L.;  Wang L.;  Wang L.;  Liu Y. 收藏  |  浏览/下载：7/0  |  提交时间：2013/03/28 High power VCSEL device with periodic gain active region (EI CONFERENCE) 会议论文  OAI收割 Optoelectronic Materials and Devices II, November 2, 2007 - November 5, 2007, Wuhan, China 作者:  Zhang Y.;  Liu Y.;  Liu Y.;  Liu Y.;  Qin L. 收藏  |  浏览/下载：20/0  |  提交时间：2013/03/25 High power vertical cavity surface emitting lasers with large aperture have been fabricated through improving passivation  lateral oxidation and heat dissipation techniques. Different from conventional three quantum well structure  a periodic gain active region with nine quantum wells was incorporated into the VCSEL structure  with which high efficiency and high power operation were expected. The nine quantum wells were divided into three groups with each of them located at the antinodes of the cavity to enhance the coupling between the optical field and the gain region. Large aperture and bottom-emitting configuration was used to improve the beam quality and the heat dissipation. A maximum output power of 1.4W was demonstrated at CW operation for a 400m-diameter device. The lasing wavelength shifted to 995.5nm with a FWHM of 2nm at a current of 4.8A due to the internal heating and the absence of active water cooling. A ring-shape farfield pattern was induced by the non-homogeneous lateral current distribution in large diameter device. The light intensity at the center of the ring increased with increasing current. A symmetric round light spot at the center and single transverse mode operation with a divergence angle of 16 were observed with current beyond 4.8A.   Effect of thermal load on optical characteristics of zoom system 会议论文  OAI收割 2006 Song C. P.; Qiao Y. T.; Wang Y. F.; Xu Z. 收藏  |  浏览/下载：6/0  |  提交时间：2013/03/28 Improved decision tree algorithm: ID3(+) 会议论文  OAI收割 2006 Xu M.; Wang J. L.; Chen T. 收藏  |  浏览/下载：8/0  |  提交时间：2013/03/28