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一、引言激光束相位分布的测量,通常是在激光束的截面上放置一个开了两个小园孔的光屏,利用这两个小孔所产生的干涉效应、根据光的干涉强度Ⅰ与穿过每个小孔的光强Ⅰ_1、Ⅰ_2及其相位差△Φ(包括这两个小孔所在位置到观察测量屏的程差)之间的关系
I. INTRODUCTION Measurement of phase distribution of laser beam usually places a light screen with two small garden holes on the cross section of the laser beam to make use of the interference effect produced by these two holes. According to the interference intensity of light I and The relationship between the light intensity I_1 and I_2 passing through each hole and the phase difference △ Φ (including the distance between the two holes and the observation measuring screen)