基于菲涅尔-基尔霍夫衍射的z扫描高斯衍射模型程序代码-GAUSSIAN diffration model of z-scan

惠更斯-菲涅尔衍射计算，非常不错，简单易行。-Huygens- Fresnel diffraction calculations, very good, easy.

实现菲涅尔透镜的一种方法，可以通过改变焦距或者厚度等参数实现透镜功能的转化(A method of realizing Finel lens can realize the conversion of lens function by changing the focal length or thickness parameters)