星敏感器光学系统弥散斑测试方法  

Measurement of dispersed spot for star sensor optics

作　　者：周艳[1] 赵建科[1] 昌明[1] 潘亮[1] 

机构地区：[1]中国科学院西安光学精密机械研究所,陕西西安710119

出　　处：《应用光学》2009年第3期454-456,共3页Journal of Applied Optics

摘　　要：提出了一种星敏感器光学系统弥散斑尺寸的测试方法,主要是利用平行光管、转台和CCD显微摄像系统组成弥散斑测量系统,采集图像后,采用双三次插值像元细分,提取图像中灰度值,依据瑞利判据计算弥散斑尺寸。通过实际测量和试验验证,光学系统0.8视场弥散斑测量精度可以达到0.5μm,重复测量精度可达0.2μm。A method for measuring the size of the dispersed spot of star sensor optical lens is presented. A measurement system consisting of a collimator, a rotary table and a CCD cameral was implemented to measure dispersed spot. After a image is acquired, a method of bibubic interpolation pixel subdivision is used to pick up the gray value of the image, and the size of dispersed spot is calculated by Rayleigh criterion. The actual measurement and verification test show that the measurement accuracy of the dispersed spot in 0. 8 FOV reaches 0. 5 μm, repeat measurement accuracy can reach 0. 2 μm.

关 键 词：星敏感器光学系统 弥散斑 测量误差 

分 类 号：TB851[一般工业技术—摄影技术] TN206[电子电信—物理电子学]