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.
利用棱镜引起
射光束
偏折的原理,提
了一种位移法测
棱镜微小底角的新
法,介绍了测
的基本原理,讨论了测
误差.