Fresnel 衍射的计算机模拟演示

摘要

基于 Huygens-Fresnel 衍射积分,利用 Hankel 变换算法及球面波因子处理方法,在普通 PC上使用 MFC 编程较好地实现了 Fresnel 衍射的计算机模拟演示。演示中,Fresnel 衍射的输入光强剖面分布、输出光强剖面分布和输出光强影射图样分别随光的传输距离和波长及输入光束半腰的改变而变化,光的传输距离和波长及输入光束半腰分别由三个滚动条分别控制。%Based on Huygens-Fresnel diffraction integral,applying Hankel transformation algorithm and spherical wave factor method,computer simulation demonstration of Fresnel diffraction can be implemented well in the general PC using MFC pro-gramming.During the demonstration,the sectional plane distribution of input intensity,sectional plane distribution of output intensity,and the diffraction pattern of Fresnel diffraction are changed respectively as the transmission distance and wavelength of light and input beam waist changes.The transmission distance and wavelength of light and input beam waist are controlled by three scroll bars,respectively.