大口径离轴式空间望远镜全链路像质分析研究

针对复杂工况下空间望远镜成像质量难以综合评价的问题,采用了全链路计算方法对在轨工作的望远镜进行分析。将像质退化的因素归结为6项静态误差和2项动态误差。经计算,加载静态误差后光学系统波像差平均下降至0.057 \lambda;受静态和动态误差因素的影响,全视场点扩散函数80%能量集中度角分辨率逐步增大。实验结果表明：本文采用的方法可用于分析评估精密温控、稳像控制等技术对空间望远镜像质的影响,同时也是寻找制约望远镜像质优良的关键因素。

Analysis and Research on End-to-end Optical Image Quality of Large Aperture Off-axis Space Telescope

In order to evaluate the image quality of space on orbit telescope under the comprehensive constraints, the chain calculation analysis method is adopted. The main error factors of the optical image quality degradation are divided into six static errors and two dynamic errors. After calculation, the optical system wavefront aberration under the static loading error is reduced to 0.057λ on average. Under the influence of the static and dynamic errors, the 80% energy concentration of point spread function increases gradually. The method can be used to analyze and evaluate the influence of image stabilization control and precise temperature control on the image quality of space telescope,and can identify the key factors that restricting the high image quality of space telescope.