本文介绍了作者研制的无缝棱镜导光管照明系统中，导光管外表面附加的反射膜对导光管光线传输特性和光线分布特性的影响。
The influence of surface reflective film on light-transporting efficiency and light distribution of seamless prism light guides developed by the author is discussed in this paper.
晶体厚度，空气膜层厚度，棱镜结构角共同影响棱镜偏光镜的透射比。
Transmission of polarizing prism is affected by crystal thickness, air inter layer thickness and configuration Angle.
望远镜斯密特屋脊棱镜表面镀上相位膜，可提高望远镜的观察效果。
The phase film is a kind of special film coated the Shimite roof prism of binoculars.
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