为了进一步提高超分辨卫星载荷光学系统的空间分辨能力, 需对系统杂散光进行抑制, 以得到准确的原始图像.通过光线追迹方式, 分析了系统杂散光, 确认了杂散光的来源.通过Tracepro定量化分析和结构有限元分析, 在限制范围内, 不断优化、改进遮光罩尺寸及挡光环位置, 得到光学系统视场外点源透射比均在10-3以下, 验证了该杂散光抑制方案的有效性, 为卡塞格林光学系统的工程应用提供参考.

In order to further improve the spatial resolution of the super-resolution satellite load optical system, it is necessary to suppress the stray light of the system to obtain accurate original images. By ray tracing, the stray light is analyzed, and the source of stray light is confirmed. Through the quantitative analysis and structural finite element analysis by Traccpro, the size of the hood and the position of the block were optimized, the point sources transmittance of the external point of the optical system is 10-3. The stray light suppression scheme is effective. The stray light suppression measures proposed in this paper provide theoretical support for the engineering application of Cassegrain optical system.