一、前言一切高精度光学合像读数系统,都离不开合像棱镜。它的作用是通过二组倍率严格相等的物镜,将度盘对径部分刻线的影像聚合在一起。即成像在读数系统的同一视场内,以便于读数系统实现测量。合像棱镜的型式虽有多种,特色各异,但有一个共同的特点,即都有 First, the foreword All high-precision optical imaging system like reading, are inseparable from the prism. Its role is through the two groups of exactly equal magnification objective lens, the diameter of the dial on the part of the scoring line together. That imaging system in the same reading field, in order to facilitate the measurement system to achieve measurement. Although there are many types of prism imaging, different features, but there is a common characteristic, that is, have