单星模拟器杂散光抑制分析

Stray light reduction analysis in single star simulator

针对单星模拟器主体光管中存在大量杂散光的问题,本文提出设置多级拦光光阑消除杂散光。该方法根据多级拦光光阑的设计原则设定光阑的位置和孔径,采用TracePro软件对设计结果进行了模拟分析。实验结果表明,杂散光得到了有效的抑制,保证了单星模拟器的模拟星光平行度2″的指标。

To suppress the great amount of stray lights in the main pipe of single star simulator, a method that sets multi-level cut-off diaphragms to constrain those stray lights is presented. The position and aperture of each diaphragm are set based on the design principle of multi-level cut-off diaphragm. Tracepro, which is a powerful ray tracing program, is used to estimate the efficiency of the design. The experimental results indicate that multi-level diaphragms restrain the stray lights inside the main pipe efficiently, and ensure the parallel error of simulated star light less than 2 arcsec .