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 ...