本文在冰洲石晶体偏光器件中选择了具有代表性的Glan Taylor棱镜 ,对其消光比、角度偏离量的测试进行了研究 ,并对其实验结果进行了分析 ,找出了影响偏光棱镜性能的因素 ,针对主要因素提出了改进措施 :棱镜的光轴方向与实际晶体的光轴方向差距大 ,则将严重影响棱镜的消光比 ,其角度偏离量也将增大 ;原材料的质量对棱镜的各项性能都有极大的影响 ,所以选料很重要 In this paper, a representative Glan Taylor prism is selected from the lithocrystal polarizer. The extinction ratio and angular deviation of the prism are studied. The experimental results are also analyzed to find out the influence of polarization prism Factors, the main factors for the improvement measures proposed: the optical axis of the prism and the actual optical axis of the crystal gap is large, it will seriously affect the extinction ratio of the prism, the angle deviation will increase; the quality of raw materials of the prism Item performance has a tremendous impact, so the choice of materials is very important