全息成象的一种近区快速算法

本文研究了利用快速褶积进行全息成象近区快速数字重现的方法,并和角谱法进行了对比.这种方法速度慢于角谱法,但它和直接算法结果完全相同,是一种精确的快速算法.另外,这种方法还可用于成象面大于全息图面的情况,这时可使用分块快速褶积法.

A FAST ALGORITHM FOR NEAR REGION IN HOLOGRAPHIC RECONSTRUCTION

A fast algorithm based on fast convolution for near region numerical reconstruction of holography is presented, and is compared with the angular spectrum method. This method is a precise, fast computational procedure, giving identical results as that by the method, although it is slower than the angular spectrum method. In addition, it can also bo applied to the case in which the image plane is greater than the hologram plane by using block-by-block fast convolution.