一种产生角定位莫尔条纹的方法

A Method to Produce the Moire Fringes for Determining Angular Point

本文提出了一种由长直光栅产生角定位莫尔条纹的方法。当两光栅的刻线方向完全平行时，由两光栅产生的莫尔图样为平行条纹；如果其中的一块光栅相对另一块光栅转动时，莫尔图样为箭头状条纹，且角位移越大，箭头的夹角越钝。本文提出的方法可用于微小角位移的测量及角度定位。

This paper presents a method to produce the Moire fringes by two Ronchiruling gratings for determining the angular POint. When the Ronchi ruling of two gratingsare positioned parallel to each other, the Moire patterns formed by two gratings are parallelfringes.If one of the gratings is rotated with respect to the other,the Moire patterns are arrow--like fringes and the larger the angular displacement is,the more obtuse the arrows are.This method can be used in high-accuracy measurement of the small displacement and angular position.