说明：  圆孔的夫琅和费衍射，以动画的形式表式衍射的过程，以及最后衍射的图样（来源于http://luobo.ycool.com/post.701424.html）
(Round hole of Fraunhofer diffraction to the form of table-style animation of the process of diffraction, and the final diffraction pattern (from http://luobo.ycool.com/post.701424.html))