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基于光斑高斯拟合的大视场星相机定焦方法

Focus Locating Method on Guassian Fitting of Light Spot for Wide Field Star Camera

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摘要

针对高精度立体测绘任务对星相机的使用要求, 提出了一种基于光斑高斯拟合的星相机焦面定焦方法。首先, 搭建了基于星点靶标和平行光管的定焦系统, 通过移动靶标在中心和边缘视场获取多幅不同程度的离焦图像; 其次, 采用基于平方加权的质心定位算法计算各视场靶标点像的精确位置用于像面拟合; 然后, 采用Gibbs采样/马尔可夫蒙特卡洛法对每个光斑进行高斯曲面拟合, 获取星点的高斯半径, 通过对各视场的最佳焦面位置进行最小二乘拟合, 得到最佳像面。对上述定焦方法进行了试验验证, 结果表明星相机在各视场的能量集中度测量值与设计值符合, 星相机在轨拍摄的星点图像满足要求。

Abstract

Aiming at the requirements of star camera for high precision stereo mapping, a focus locating method based on Guassian fitting of light spot is introduced. Firstly, a focus locating system was built with a point target and a collimator. Several defocused photos were taken by moving the target in central and fringe fields of view. Secondly, an algorithm of centroid locating on squared weighting method was used to calculate the precise location in each field of view to fit the image surface, and an algorithm of Gibbs sampling and Markov Chain Monte Carlo was applied to each light spot to make Guassian curve fitting, to get the Guassian radius of each light spot. Then, the best focal plane was acquired by least squares fitting of the optimum focal planes in each field of view. Tests verify that the enegy focusability in each field of view agrees with the design value, and the pictures taken on orbit meet requirements.

Newport宣传-MKS新实验室计划
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中图分类号:V445.8

DOI:10.16818/j.issn1001-5868.2019.02.024

所属栏目:光电技术及应用

基金项目:国家重点研发计划地球观测与导航重点专项项目(2016YFB0500802)

收稿日期:2018-11-17

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作者单位    点击查看

邸晶晶:北京空间机电研究所, 北京 100094
王伟之:北京空间机电研究所, 北京 100094
任宇宁:北京空间机电研究所, 北京 100094
于艳波:北京空间机电研究所, 北京 100094
宗云花:北京空间机电研究所, 北京 100094
贾永丹:北京空间机电研究所, 北京 100094
王 妍:北京空间机电研究所, 北京 100094

联系人作者:邸晶晶(dijing2012@163.com)

备注:邸晶晶(1987-), 女, 硕士, 工程师, 主要从事空间遥感器设计和测试方面的研究。

【1】范 宁, 祖家国, 杨文涛, 等. WorldView系列卫星设计状态分析与启示[J]. 航天器环境工程, 2014, 31(3): 337342.
Fan Ning, Zu Jiaguo, Yang Wentao, et al. The design of WorldView satellite and its demonstrative value[J]. Spacecraft Environment Engin., 2014, 31(3): 337342.

【2】钟 兴, 金 光, 王 栋, 等. CMOS星敏感器焦平面装配及标定[J]. 光电工程, 2011, 38(9): 15.
Zhong Xing, Jin Guang, Wang Dong, et al. Focal plane assembly and calibrating of CMOS star sensor[J]. OptoElectronic Engin., 2011, 38(9): 15.

【3】卫雅欣. 星敏感器成像平面装校方法的研究[D]. 天津: 天津大学, 2015.
Wei Yaxin. Study on the calibration method of star sensor imaging plane[D]. Tianjin: Tianjin University, 2015.

【4】刘 源, 谢睿达, 赵 琳, 等. 基于机器学习的大视场星敏感器畸变在轨标定技术[J]. 红外与激光工程, 2016, 45(12): 121700419.
Liu Yuan, Xie Ruida, Zhao Lin, et al. Machine learning based onorbit distortion calibration technique for large fieldofview star tracker[J]. Infrared and Laser Engin., 2016, 45(12): 121700419.

【5】唐圣金, 郭晓松, 周召发, 等. 星点亚像元定位中系统误差的改进补偿方法[J]. 红外与激光工程, 2013, 42(6): 15021507.
Tang Shengjin, Guo Xiaosong, Zhou Zhaofa, et al. Modified systematic error compensation algorithm for star centroid subpixel detection[J]. Infrared and Laser Engin., 2013, 42(6): 15021507.

【6】王洪涛, 罗长洲, 王 渝, 等. 基于背景自适应预测的星点提取算法[J]. 光学技术, 2009, 35(3): 412418.
Wang Hongtao, Luo Changzhou, Wang Yu, et al. Algorithm for star extraction based on selfadaptive background prediction[J]. Optical Technique, 2009, 35(3): 412418.

【7】魏新国, 张广军, 江 洁. 星敏感器中星图图像的星体细分定位方法研究[J]. 北京航空航天大学学报, 2003, 29(9): 812815.
Wei Xinguo, Zhang Guangjun, Jiang Jie. Subdivided locating method of star image for star sensor[J]. J. of Beijing University of Aeronautics and Astronautics, 2003, 29(9): 812815.

【8】Efron B. The bootstrap and Markovchain Monte Carlo[J]. J. of Biopharmaceutical Statistics, 2011, 21(6): 10521062.

引用该论文

DI Jingjing,WANG Weizhi,REN Yuning,YU Yanbo,ZONG Yunhua,JIA Yongdan,WANG Yan. Focus Locating Method on Guassian Fitting of Light Spot for Wide Field Star Camera[J]. Semiconductor Optoelectronics, 2019, 40(2): 261-265

邸晶晶,王伟之,任宇宁,于艳波,宗云花,贾永丹,王 妍. 基于光斑高斯拟合的大视场星相机定焦方法[J]. 半导体光电, 2019, 40(2): 261-265

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