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
向双向偏折
原理,提出了一种位移法测量玻璃双镜微小底角
法,介绍了测量基本原理,讨论了测量误差.
