1.通过本实验掌握数字全息实验原理和方法；
2.通过MATLAB编程，对实验数字全息图进行数据处理，达到提高再现像质量和方便提取有用信息的目的；
3.用空域滤波方法消除零级像；
4.理解波前记录与再现。(1. Master the principle and method of digital holography experiment through this experiment;
2. Through MATLAB programming, the experimental digital hologram data processing, to improve the quality of the reconstructed image and facilitate the extraction of useful information;
3. Using spatial filtering method to eliminate zero order image;
4. Understand wavefront recording and reproduction.)