本代码根据菲涅尔衍射原理，设计出三维全息，即，纵深的距离不同显示内容不同，同时产生可用于加载到空间光调制的全息图，使得实际再现成为可能(According to the principle of Fresnel diffraction, this code designs a three-dimensional holography, that is, the displayed things is different with the different z distance, and the hologram can be loaded into the spatial light modulation, which makes the actual reproduction possible.)