镜
，绕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
光束方向双向偏折的原理,提出
一种位移法测量玻璃双镜微小底角的新方法,
测量的基本原理,讨论测量误差.
