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，给出一种新型平行分束偏光镜的设计。该棱镜为ZBaF₃玻璃中间夹冰洲石晶体薄片的三元结构，并由大折射率液态胶合剂溴代萘胶合而成。理论分析和实验测试表明，该棱镜消光比优于10^－3，且可以实现大的横向剪切。

In order to save the rare iceland and increase the shear difference,a new type of parallel beam sputter combined of iceland and glass is designed. The prism is made of ZBaF₃ glass,between which is iceland. The glue is C₁₀H₇Br with high refractive index. It can be approved by the theory and experiment that the extinction ratio of the parallel beam splitter is better than 10^－3,and the shear difference is improved too.