中国科学院机构知识库网格系统: 检索

浏览/检索结果: 共5条，第1-5条

帮助

条数/页：排序方式：
	Design and test of focusing mechanism of space camera (EI CONFERENCE) 会议论文 OAI收割 5th International Symposium on Advanced Optical Manufacturing and Testing Technologies: Design, Manufacturing, and Testing of Micro- and Nano-Optical Devices and Systems, April 26, 2010 - April 29, 2010, Dalian, China 作者: Li Y.; Li Y.; Li Y.; Wang H.; Wang H. 收藏 \| 浏览/下载：30/0 \| 提交时间：2013/03/25 According to the focal depth and work environment of a space camera a focusing mechanism is designed which consists of precision screw ball transmission and linear bearing guidance and accuracy improving. The dynamic- strike- resistance adaptability to temperature and vacuum are considered into the reliable design method. Furthermore the linearity error the structure stability and the mechanism work situation in high and low temperature are tested. The result is that the linearity error of the mechanism is less than 0.003 mm and the sway error of vertical way and level way of the mirror is less than 20''. The linearity error of the mechanism and the sway error of the mirror remain unchanged after vibration test. The mechanism can work in the complex space environment. 2010 SPIE.
	Analysis of optical systems with extended depth of field using the Wigner distribution function 期刊论文 OAI收割 appl. optics, 2006, 卷号: 45, 期号: 34, 页码: 8586, 8595 Yang Qingguo; 刘立人; 孙建锋; Zhu Yongjian; Lu Wei 收藏 \| 浏览/下载：1230/197 \| 提交时间：2009/09/18 PHASE-SPACE DISTRIBUTIONS HIGH FOCAL DEPTH IMAGING-SYSTEMS AMBIGUITY FUNCTION APERTURES PLATE FOCUS OTF
	Study on LD-pumped Nd:YAG laser cutter (EI CONFERENCE) 会议论文 OAI收割 ICO20: Lasers and Laser Technologies, August 21, 2005 - August 26, 2005, Changchun, China 作者: Zhang G.; Zhang G.; Zhang G.; Zhang J.; Zhang J. 收藏 \| 浏览/下载：23/0 \| 提交时间：2013/03/25 The theory of laser cutter and the technology neck is analyzed. We can conclude that it is almost impossible to deal with the waste thick silicon wafers which are yielded in producing silicon wafers by conventional eroding or diamond cutting when the cutting velocity equals 100mm/min while it is also unperfected with ecumenical laser cutter without good beam quality or precise laseroptics system. It is represented that high average power and high repetition rate laser with good beam quality and precise laseroptics system are pivotal to obtain excellent cutting effect such as thick groove depth double-layer 0.75mm thick silicon wafer can be penetrated.. The cross section is fine and the groove is narrow rapid cutting speed the cutting quality meets the expecting demand. fine kerf section without considering the effect of technique. Considering laser medium thermal lens effect and thermal focal length changing with pumping power using plano-convex high reflectivity mirror as the back cavity mirror to compensate the heat lens influence a /4 waveplate to compensate heat -induced birefraction utilize the Nd:YAG self- aperture effect more than 50 W average power 1.064 um IR output is obtained with beam quality factor (M2) equals 3.19. Through the LD-Pumped Nd:YAG laser cutter we developed with short focus length negative spherical aberration focusing lens double axis linear step motor positioning system suitable beam expander multiplying factor appropriate diameter of exit beam aperture proper repetition rate when the cutting velocity equals 400mm/min 0.75mm thick silicon wafer can be penetrated
	Tunable three-dimensional intensity distribution by a pure phase-shifting apodizer 期刊论文 OAI收割 appl. optics, 2005, 卷号: 44, 期号: 23, 页码: 4870, 4873 Gao XM; Fei Z; 徐文东; 干福熹收藏 \| 浏览/下载：1864/357 \| 提交时间：2009/09/22 HIGH FOCAL DEPTH EXTENDED DEPTH FOCUS GENERATION FIELD BEAM
	Enlarging the depth of focus by filtering in the phase-space domain 期刊论文 OAI收割 appl. optics, 2005, 卷号: 44, 期号: 32, 页码: 6833, 6840 Yang QG; 刘立人; Lang HT 收藏 \| 浏览/下载：1751/229 \| 提交时间：2009/09/18 WIGNER DISTRIBUTION FUNCTION HIGH FOCAL DEPTH AMBIGUITY FUNCTION OPTICAL-SYSTEMS IMAGING-SYSTEMS EXTENDED DEPTH STREHL RATIO APERTURES FIELD ABERRATION