本文提出用亮圆环在透镜后产生的衍射图样中心的连线作准直线的一种新方法。文中详细讨论了准直原理、准直精度及准直距离,并给出了实验例证。

This paper proposes a new method for laser alignment. When a circle ring situated in the front fooal plane of a convex lens is illuminated by a plane monochromatic wave, the center of diffraction pattern of the circle ring forms a straight line for alignment behind the lens.The principle as well as precision and distance for alignment are discussed in detail. The experimental results are also given.