用光栅摆动法检校光束准直性

Checking the Degree of Beam Collimation by the Rotating Grating

本文介绍一种基于Talbot效应检校光束准直性的新方法——光栅摆动法。它不需要测量莫尔条纹的方向,也不需要瞄准条纹,而仅仅是转动光栅时观察莫尔条纹的变化规律。文章从理论上阐述了这一方法的基本原理,并通过实验验证,表明该方法具有准直精度高、检测装置简单,操作方便等优点。

In this paper, based on the Talbot effect, we suggest a new method for checking the degree of beam collimation, the rotating grating method. We don't need to measure the orientation of Moire fringe or rteed not align Moire fringe. We only observe the rule of change of Moire fringe when rotating graing.It has been proved by the theory and experiment. This method has high accuracy, its setup is simple and operation is convenient.