CCD相机的杂散光模拟计算与分析

Simulation and analysis of stray light in CCD camera

将蒙特卡罗（MonteCarlo）法应用于空间光学系统的杂散光模拟计算，分析了CCD相机的杂散光进入水平，分别给出入口段和主体段的局部杂光系数及相机光学系统的整体杂光系数，对CCD相机的入口段，模拟计算了遮光罩三种不同长度、反光镜在三种不同扫描角度下的杂光系数．将主体段的杂光系数计算结果与实验测量值进行了比较，二者数量级相同，并分析了计算参数的不确定性（包括热物性参数的不确定性和几何结构的简化）对主体段杂光计算精度的影响。

Using the Monte Carlo method, the stray radiation level in CCD camera is analyzed, and the local stray coefficient at the entrance and the main section, and the entire stray coefficient in CCD camera are calculated. In the calculation processes, three different heights of sunshade and angles of mirror at the entrance section are considered. Comparing with experiment data showed that the calculation results are of the same order of magnitude as the experiment data. The effect of uncertainties of variables on the calculation precision of stray light at the main section is also analyzed.