为了更好地进行菲涅耳全息图的CCD记录及重现，设计了一种CCD同轴全息图的重构算法，该方法首先用CCD代替传统干版直接记录菲涅耳同轴全息图，并以位图形式存储到计算机中；然后利用数值计算代替光学衍射过程来再现物体的像；最后通过实验验证了该算法及数字全息图的不可撕毁性。

In order to let the CCD recording and the reconstruction of the Fresnel hologram run well, a algorithm of numerical reconstruction is designed. Fresnel digital hologram is recorded directly with a CCD target instead of a conventional holographic plate on in-line configuration, and stored as a BitMap file in the computer. A real image of the original object can be reconstructed from the hologram by the numerical method instead of the optical diffraction. The paper deals with an experimental design of the in-line holographic recording with a CCD and the algorithm of numerical reconstruction and the un-destructibility of the digital hologram are verified with a computer program.