Design of 90° defection polarizing prism with sandwich structure

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.