自适应双频激光准直系统的原理及实验

介绍了一种新型自适应双频激光准直系统，该系统利用两个完全对称的渥拉斯顿棱镜，五个作为测量元件，另一个作为补偿元件。对测量信号的处理，采用比相技术，测量元件可以暂时移出光路，因而能够进行同轴度的测量。两束干涉光基符合共光路原则，适应于长距离的准直测量。

Adaptive Straightness Measurement System with Dual Frequency Laser

A new two frequency laser alignment system is developed which consists of two Wollaston prisms with the same structure. One is for measurement; another for compensation. Using phasemeter, the two prisms can be moved out off the beam, so the system can be used to measure coaxality. The displacement drift and angle drift of laser beam are compensated by the optical system automatically. The paper analyzes those adaptive characteristic in theory. Experimental result is in concordance with theoretical analysis.