本文讨论了建立四反射镜环形反馈系统的有关问题，探讨了利用环形反馈系统控制图象对比度变化的原理。

This paper studies the establishment of four-mirror circle feedback system and the principle of controlling contrast changes of the image pattern by this system.

youdao

本文讨论了建立四反射镜环形反馈系统的有关问题，探讨了利用环形反馈系统控制图象对比度变化的原理。

This paper studies the establishment of four-mirror circle feedback system and the principle of controlling contrast changes of the image pattern by this system.

youdao