光学学报, 2009, 29 (1): 7, 网络出版: 2009-02-10
分块式空间望远镜波前传感及控制方法的仿真研究
Simulation Research on Wavefront Sensing and Correction Algorithms for Segmented Space Telescope
自适应光学 波前传感 集成仿真 分块式空间望远镜 adaptive optics wavefront sensing integrated simulation segmented space telescope
摘要
分块式空间望远镜的波前传感及控制方法是实现高分辨率成像的关键。空间望远镜在轨展开后, 由于空间环境及光学系统本身的特点, 存在位置和面形误差, 波前误差动态范围大、空间频率覆盖宽, 需要采用分级校正的方法逐步减小误差。给出了波前校正流程及相应的波前传感及控制方法。利用Zemax软件建立了同轴偏场三反射镜系统仿真模型, 并对主镜进行了分块设计。针对该系统模型, 建立了分块式空间望远镜系统波前传感及控制集成仿真软件, 通过分析分块主镜的波前误差校正过程验证了算法的可行性。
Abstract
Wavefront sensing and control algorithms play a very important role in high-resolution imaging of segmented space telescope. In this paper, a coaxial three-mirror anastigmat system is modeled by Zemax and the primary mirror is a segmented design. After space telescope deployment, the wavefront errors have a wide dynamic range in amplitude and spatial frequency, so a multistage wavefront correction control strategy is proposed to reduce wavefront errors gradually. The wavefront correction process and the wavefront sensing and correction algorithms performed in each step are given in detail. Integrated simulation software is developed to verify our algorithms. Wavefront correction results of segmented primary mirror give a good demonstration of the feasibility of our algorithms.
张晓芳, 董冰, 黄一帆, 毛珩, 王姗姗, 俞信. 分块式空间望远镜波前传感及控制方法的仿真研究[J]. 光学学报, 2009, 29(1): 7. Zhang Xiaofang, Dong Bing, Huang Yifan, Mao Heng, Wang Shanshan, Yu Xin. Simulation Research on Wavefront Sensing and Correction Algorithms for Segmented Space Telescope[J]. Acta Optica Sinica, 2009, 29(1): 7.