从光学设计的角度出发，介绍了冷屏杂散辐射抑制的基本原理。基于几何光学的基本原理，应用ASAP 软件的计算机仿真模拟手段进行实际的光学系统建模，在现有冷屏设计的基础上，仿真具有不同挡光环个数和不同开孔形状的挡光环的冷屏，分析筛选杂散辐射抑制效果最好的冷屏，在尽量减轻重量、减小体积的前提下，获得尽可能好的消杂散辐射效果。

From the perspective of optical design, the basic principle of cold field stray radiation suppression was introduced. Based on the basic principle of geometrical optics, the simulation function of ASAP was used for the actual optical system modeling. Based on the existing cold field design, simulation of different number and different hole shape of baffles of the cold field was done. Analysis and selection of the cold field which is the best of the stray radiation suppression was made. On the premise that reducing the weight and volume as much as possible, good stray radiation suppression has been achieved.