biprism

Based on the double refraction principle of outgoing beam in the biprism,the displacement method for measuring the small angle of biprism is presented.The error of this method is also discussed.

利用双镜引起出射光束方向双向偏折的原理,提出一种位移法量玻璃双镜微小底角的新方法,介绍量的基本原理,讨量误差.