为了节省稀有昂贵的冰洲石晶体材料，采用冰洲石晶体与光学玻璃组合的方法，设计了一种新型起偏棱镜。设计样品为ZBaF3玻璃中间加冰洲石晶体薄片的三元结构，并通过大折射率液态胶合剂溴代萘胶合而成。该棱镜既可以实现o光的偏振输出，又可实现入射光的90°转向。实验测试结果表明：设计棱镜的透射比在80％以上，消光比优于10-3。理论分析和性能测试均表明：三元结构冰洲石-玻璃90°转向起偏棱镜在一般情况下，可以取代相应的纯冰洲石晶体材料的偏光棱镜。

In order to save the rare cryolite, a new type of polarizing prism was developed with the combination of cryolite and glass. The prism is made of ZBaF3 glass, between which is cryolite, and the glue is C10H7Br with a big refractive index. It can provide the polarized output for o light as well as a deflection 90° relative to the incident light. The experiment indicates that the transmittance of the prism is more than 80％,  and the extinction ratio is better than 10-3. It  is proved that this kind of prism can be used to replace the traditional prism made of pure cryolite.

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