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浏览/检索结果: 共11条，第1-10条 帮助 限定条件 内容类型：会议论文    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     已选(0)清除 条数/页：5101520253035404550556065707580859095100   排序方式：请选择作者升序作者降序题名升序题名降序发表日期升序发表日期降序提交时间升序提交时间降序 Central obscuration effects on optical synthetic aperture imaging 会议论文 Conferences of the Photoelectronic Technology Committee of the Chinese Society of Astronautics: Optical Imaging, Remote Sensing, and Laser-Matter Interaction 2013, October 20, 2013 - October 29, 2013, SuZhou, China Wang X.-W.; Luo X.; Zheng L.-G.; Zhang X.-J. 收藏  |  浏览/下载：26/0  |  提交时间：2015/04/27 Fabrication and metrology study for M3M of TMT 会议论文 7th International Symposium on Advanced Optical Manufacturing and Testing Technologies: Large Mirrors and Telescopes, AOMATT 2014, April 26, 2014 - April 29, 2014, Harbin, China Luo X. 收藏  |  浏览/下载：9/0  |  提交时间：2015/04/27 Design scheme for optical manufacturing support system of TMT M3 prototype 会议论文 7th International Symposium on Advanced Optical Manufacturing and Testing Technologies: Large Mirrors and Telescopes, AOMATT 2014, April 26, 2014 - April 29, 2014, Harbin, China Hu H.; Luo X. 收藏  |  浏览/下载：21/0  |  提交时间：2015/04/27 Luminescence and energy transfer in Ca3Sc2Si 3O12:Ce3+,Mn2+ white LED phosphors (EI CONFERENCE) 会议论文 Liu Y.; Zhang X.; Hao Z.; Luo Y.; Wang X.; Ma L.; Zhang J. 收藏  |  浏览/下载：31/0  |  提交时间：2013/03/25 Expanded emission spectra ranging from green to red are reported in Ca 3Sc2Si3O12 (CSS):Ce 3+  Mn2+ silicate garnets. Mn2+ may occupy Ca2 site (Mn2+(I)) to generate a yellow emission band at 574 nm or Sc3 site (Mn2+(II)) with red emission band at 680 nm. Efficient energy transfers from the green emitting Ce3+ to both Mn2+(I) and Mn2+(II) occur upon blue excitation into Ce3+. Concentration dependence of Mn2+ emission is analyzed based on Ce3+-Mn2+ energy transfer  steady state rate equations  and fluorescence lifetimes. Energy transfer efficiency (nT) and rate (W) are calculated with values as high as 45% and 14.01106 s-1  respectively. 2011 Elsevier B.V.   The removal function of edge effect and amending with dwell time function 会议论文 2010 Deng W. J.; Zheng L. G.; Wang X. K.; Luo X. A.; Zhang F. 收藏  |  浏览/下载：13/0  |  提交时间：2013/03/28 Fabrication of large off-axis asymmetry aspherics using stressed lap with orbital tool motion 会议论文 2010 Luo X.; Zheng L. G.; Zhang X. J. 收藏  |  浏览/下载：6/0  |  提交时间：2013/03/28 The key technologies of a new semi-automatic chemiluminescence immunoassay analyzer based on the photomultiplier tube (EI CONFERENCE) 会议论文 2010 3rd International Conference on Advanced Computer Theory and Engineering, ICACTE 2010, August 20, 2010 - August 22, 2010, Chengdu, China Luo G.; Wang B.; Yuan C.; Wu Z.; Zhang X. 收藏  |  浏览/下载：25/0  |  提交时间：2013/03/25 In this paper  we present a new semi-automatic chemiluminescence immunoassay analyzer  which is based on photons counter consists by the photomultiplier tube.The photons count efficiency is very high  which makes the test result be more sensitive and steady.A calibration circuit was presented int this paper  which was used to check the veracity of the photons counting. Significantly  this paper presents two unique compensation modules-measuring chamber and double spherical-convex lens optical system  which are used to improve the efficiency of photons counting. 2010 IEEE.   The removal function of edge effect and amending with dwell time function (EI CONFERENCE) 会议论文 5th International Symposium on Advanced Optical Manufacturing and Testing Technologies: Advanced Optical Manufacturing Technologies, April 26, 2010 - April 29, 2010, Dalian, China Deng W.-J.; Zheng L.-G.; Wang X.-K.; Luo X.; Zhang F. 收藏  |  浏览/下载：16/0  |  提交时间：2013/03/25 Computer Controlled Optical Surfacing (CCOS) is widely used for making optical aspheric mirrors. In the practical fabrication  edge effect is an important problem which restricts the fabrication efficiency and accuracy seriously. In this paper  the edge effect is solved by working out the edge removal function and compensate with dwell time function. Skin Model is used to describe the pressure distribution when the tool hangs over the work-piece. The calculation model of edge removal function is derived from Skin Model theoretically. A removal function experiment is completed. The difference between the theoretical model and the experiment results is less than 5%. It means that the calculation model is suit for the practical fabrication. Than the dwell time is solved with edge effect compensation by matrix-based algorithm. In the end  actual experiment was done to validate the edge effect compensation method. 2010 Copyright SPIE - The International Society for Optical Engineering.   Self-adaptive Threshold Canny Operator in Color Image Edge Detection 会议论文 2009 Luo T.; Zheng X. F.; Ding T. F. 收藏  |  浏览/下载：15/0  |  提交时间：2013/03/28 Self-adaptive threshold canny operator in color image edge detection (EI CONFERENCE) 会议论文 2009 2nd International Congress on Image and Signal Processing, CISP'09, October 17, 2009 - October 19, 2009, Tianjin, China Luo T.; Zheng X.-F.; Ding T.-F. 收藏  |  浏览/下载：12/0  |  提交时间：2013/03/25 It needs to set the two thresholds of classical Canny Operator manually  which confined this algorithm. A lot of research on adaptive thresholds choice method has been done to conquer this shortcoming. Based on the gradient histogram  which is studied constantly in the past  a method of gradient histogram difference diagram with adaptive image classification techniques is proposed in this paper. It automatically sets the two thresholds  and avoids disconnected or false edges in detection. Experiments prove that the method is threshold-adaptive and the edge detection performs well in color image whose larger gradient amplitude pixels are mainly located in the edges between the target and background. 2009 IEEE.