大量程的精密测距对于国防和经济建设都是一项十分重要的工作.在激光出现以前,要同时实现高精度大距离测量是很困难的.激光出现以后,由于它有非常好的单色性、方向性(能量高度集中)和相干性,为制造测程大、精度高和白天作业的新型相位式光电测距仪提供了有利条件. 1971年,我厂 A large range of precision ranging for national defense and economic construction is a very important work in the laser before the advent of high-precision large-distance measurement is very difficult at the same time the laser appears, because it has a very good monochrome Sexuality, directionality (high energy concentration) and coherence, which provide favorable conditions for the manufacture of a new type of phase optical range finder with large measuring range, high precision and daytime operation. In 1971, our factory