红外光学系统内部热辐射引起的杂散辐射分析

利用LightTools杂散光分析软件，建立一个空间光学系统光学机械结构模型。计算这个系统内部各机械表面辐射能量到达像面的辐射能量的大小，判断出关键表面；通过比较在四种不同的发射率情况下，像面接收到各个表面杂散辐射量的变化规律，得到有用的分析结果来对这个系统提出了初步的措施抑制，并且可以指导其他类似系统的分析和设计。

Stray Radiation Analysis Caused by Interior Heat Radiation in Infrared Optical Systems

With the help of stray light analysis software of LightTools, a space-used optical system with mechanical components is built. The heat radiation reaching the image plane of the interior mechanical surfaces is computed. The critical objects are then judged. After comparing the stray radiation power of the image plane with four kinds of emittance rates, some useful results are obtained. Some basic suppression methods to this optical-mechanical system are given. The results may also help analyse and design some other systems.