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	An Image-Based Alignment Errors Correction Method for Segmented Fresnel Primary Mirror 期刊论文 OAI收割 IEEE Photonics Journal, 2020, 卷号: 12, 期号: 2, 页码: 6900614-1-14 作者: Zhu, Licheng; Yang, Ping; Wen, Lianghua; Zhao, Lujia; Guan, Chunlin \| 收藏 \| 浏览/下载：28/0 \| 提交时间：2021/05/11 Segmented Membrane Telescope Alignment Errors Fine Phasing Correction
	Telescopes Alignment Using the Sharpness Function Method Based on Undersampled Images 期刊论文 OAI收割 IEEE Photonics Journal, 2019, 卷号: 11, 期号: 1 作者: Li, Min; Liu, Xin; Zhang, Ang; Xian, Hao \| 收藏 \| 浏览/下载：13/0 \| 提交时间：2021/05/06 Telescope alignment SPGD algorithm relative RMS errors under-sampled images
	Effects of mask-alignment error on point spread function for multi-level Fresnel diffractive lenses 期刊论文 OAI收割 CHINESE OPTICS LETTERS, 2018, 卷号: 16, 期号: 9, 页码: 90501 作者: Liu, Dun; Wu, Shibin; Yang, Wei; Wang, Lihua; Fan, Bin \| 收藏 \| 浏览/下载：43/0 \| 提交时间：2019/08/23 Alignment Diffraction efficiency Efficiency Errors
	Application of improved UKF algorithm in initial alignment of SINS (EI CONFERENCE) 会议论文 OAI收割 2011 2nd International Conference on Artificial Intelligence, Management Science and Electronic Commerce, AIMSEC 2011, August 8, 2011 - August 10, 2011, Zhengzhou, China Su W. X. 收藏 \| 浏览/下载：21/0 \| 提交时间：2013/03/25 In order to improve the initial alignment accuracy and convergence rate of the SINS system proposed the improved UKF algorithm (AUKF) based on the Unscented Kalman Filter (UKF). Noise statistical characteristics are mostly unknown in real systems when it was effected by the initial value errors and dynamic model errors AUKF algorithm can real-time adjust the covariance of the state vector and observation vector and balance the right ratio of the state information and observation information in the filter results thereby improving the system performance. The experimental results show: The Improved UKF Algorithm enhances the convergence speed and alignment accuracy effectively. 2011 IEEE.
	The effect on tolerance distributing of an off-axis three mirror anastigmatic optical system with wavefront coding technology (EI CONFERENCE) 会议论文 OAI收割 Optical System Alignment and Tolerancing II, August 10, 2008 - August 11, 2008, San Diego, CA, United states 作者: Yan F.; Zhang X.-J.; Yan F. 收藏 \| 浏览/下载：35/0 \| 提交时间：2013/03/25 The wavefront coding technology is known as a system-level technology which can extend the depth of focus of optical system by innovative optical design and image restoration. This technology can control misfocus related aberrations including misfocus astigmatism and Petzval curvature temperature-related misfocus in digital imaging systems. It can also help optical system tolerate more residual error in optical manufacturing and alignment besides misfocus. The brief introduction of wavefront coding technology and the wavefront coded TMA system under research is presented respectively in part 1 and part 2. The "MTF similarity" is defined to describe the relationship among MTF at different position or different fields in the third part. It is also shown in this part that the MTF similarity of wavefront coded system is much higher than the normal system within a large range. In part 4 comparison between the origin system and the new system with wavefront coding technology is provided after multiple errors are introduced from which it can be observed that the system with wavefront coding technology can tolerate much bigger error than origin system. The error tolerance is re-distributed according to a new criterion based on MTF similarity. If the MTF similarity is less than a certain value it can be regarded that the system can tolerate the residual error. The new error tolerance is displayed and it is shown that the wavefront coding technology can also loosen the error distributing besides extended the depth of focus.
	Key techniques of laser direct writing patterns on spherical substrate (EI CONFERENCE) 会议论文 OAI收割 3rd International Symposium on Advanced Optical Manufacturing and Testing Technologies, AOMATT 2007: Design, Manufacturing, and Testing of Micro- and Nano-Optical Devices and Systems, July 8, 2007 - July 12, 2007, Chengdu, China 作者: Zhao J.-L.; Feng X.-G. 收藏 \| 浏览/下载：24/0 \| 提交时间：2013/03/25 Comparing with the writing method of plane pattern spherical pattern' has some remarkable different on several points. Firstly it is difficult to spin-coated a uniform photoresist film on a spherical substrate especially the ratio of spherical radius to caliber is smaller and the spin-coated way must match the ratio of spherical radius to caliber. Secondly if the sphere couldn't be regarded as a plane a so-called concentric optical scan movement way must be applied for the generation of spherical pattern because the reflex of substrate will affect the quantity of illumination. Commonly an alignment technique is indispensable with pattern generation of spherical surface by the concentric optical scan in order to ensure the orthogonal intersection of focusing laser beam and writing surface. Thirdly a uniform velocity control must be considered for the laser direct writing method on a spherical substrate. Otherwise the exposure time of photoresist will be different and the line widths of pattern will be also different at different areas. Fourthly commonly because the errors of concentric machine and substrate surface shape are bigger so focusing servo-control technique is also needful for writing a pattern on a spherical substrate. Focusing servo-control may keep the focal spot on the spherical surface by a focus detection and control system in the course of writing pattern. Using these techniques we fabricated a line width of 7m and a period of 600m isometric mesh on the concave of a spherical substrate.
	拼接光栅压缩器的时域特性期刊论文 OAI收割光学学报, 2007, 卷号: 27, 期号: 4, 页码: 701, 705 马雪梅; 戴亚平; 朱健强收藏 \| 浏览/下载：1732/335 \| 提交时间：2009/09/18 光学器件拼接光栅压缩器时域特性脉冲展宽偏差补偿 optical devices tiled grating compressor temporal property pulse-broadening alignment errors compensation