光学精密工程2019，Vol.27Issue(1)：26-33,8.DOI:10.3788/OPE.20192701.0026
拼接式反射镜共焦误差检测
Co-focus error detection of segmented mirrors
摘要
Abstract
Based on the traditional Shack-Hartmann wavefront sensing technology, a co-focus error detection system has been designed for the synthetic aperture system, which is used to detect the tilt error of the segmented primary mirror of the synthetic aperture system.Because of the vibration of the experimental platform and the disturbance of the air flow in the experimental environment, the centroid of mass of the Shack-Hartmann spots array makes irregular jitter which results in the co-focus error detection system not meeting the high-accuracy requirement.In order to solve this problem, amethod of continuous frame rate data sampling and image processing is proposed to overcome the influence of environment.The collected video data is processed frame by frame and superimposed on each other to analyze the distribution law of the centroid of mass of the spots array.The minimum circumscribed rectangle of the spots map is constructed to obtain the position of the centroid of the spots, which greatly improves the detection accuracy of the co-focus error detection system.Experiments show that the standard deviations of the tilt error data along the Xand Ydirections of the central mirror were reduced from 0.029 7 and 0.009 2 to 6.0×10-5 and 5.1614×10-4, respectively.Finally, the stability of the data of the spot centroid has been increased more than one magnitude, which greatly overcomes the problem of loss of precision of the detection system that is caused by environmental factors.In the meantime, the feasibility of the co-focus error detection system is verified.关键词
光学检测/共焦误差检测/拼接镜面/合成孔径系统Key words
optical detection/co-focus error detection/segmented mirrors/synthetic aperture system分类
机械制造引用本文复制引用
郑彬,陈永和,傅雨田..拼接式反射镜共焦误差检测[J].光学精密工程,2019,27(1):26-33,8.基金项目
国家863高技术研究发展计划资助项目 (No.2015AA7015090, No.2015AA7015097) （No.2015AA7015090, No.2015AA7015097）
国家自然科学基金资助项目 (No.11573049) （No.11573049）
