冰洲石-玻璃组合e光超高透偏光棱镜

为了既节省稀有昂贵的冰洲石晶体材料，又尽量提高偏光棱镜的透射比，设计了一种冰洲石晶体与光学玻璃组合的方法。叙述以布儒斯特角入射来提高偏光棱镜e光透射比的设计方案。该棱镜可用甘油或有机硅胶将FK 2玻璃与冰洲石晶体胶合而成。理论分析和实验测试表明，该棱镜的透射比高于96％，消光比优于10-5，在一定情况下可以取代纯冰洲石晶体材料的偏光棱镜。

Combination of iceland crystal and glass for e beam super-high transmittance polarizing prism

In order to save the rare iceland crystal and increase the transmittance of polarizing prism, a polarizing prism made of iceland crystal and glass was designed. The design of the prism for super-high transmittance of e beam with the Brewster incident angle was described. The sample was made of FK-2 glass and iceland crystal, between which either glycerine or organic silica gel could be used for gluing. The theoretical analysis and experiment indicate that the transmittance of the prism is more than 96%, and the extinction ratio is better than 10^-5. It was proved that the prism could replace the prism which was only made of iceland crystal in general.