新型平行分束偏光镜的设计研究

为了既节省稀有昂贵的冰洲石晶体材料,又实现偏振光的大剪切差输出,采用冰洲石晶体与光学玻璃组合的方法,给出了一种新型平行分束偏光镜的设计方案.该棱镜为冰洲石晶体中间夹光学玻璃的结构,可采取胶合剂和空气隙两种胶合方式.结果表明,在保持较高消光比和透射比,又不增加晶体使用量的前提下,相对于常规平行分束偏光镜,该棱镜一般可以将剪切差增加3倍以上.

Study on a novel parallel beam splitter

In order to save the rare iceland and increase the shear difference, a new type of parallel beam splitter combination of iceland and glass was designed. Two parts of the prism are Iceland, and optical glass is in between. They are made together by the mode of air-gap structure or glue. At the premise of good extinction ratio and high transmittance, and the saving of the iceland, it can be indicated by the theory and experiment that the prism increase the shear difference to 3 double than that of the general parallel beam splitter.