Laplacian reconstruction of one single hologram using two different reconstruction distances or wavelengths

• 来源期刊: 中国光学快报（英文版）
• 年，卷（期）: 2012,（z1）
• 页码范围: 50-53
• 页数: 4页
• 语种: 英文
• DOI: 10.3788/COL201210.S10901

摘要

A novel numerical algorithm is proposed to reconstruct the Laplacian of an object field from one single in-line hologram.This method uses two different reconstruction distances of z and z+△z,or two different reconstruction wavelengths of λ and λ+△λ to reconstruct one digital in-line hologram.Theoretical analysis shows that when the value of △z or △λ is sufficiently small,the difference of the two reconstructed fields is an approximation to the second-order Laplacian differentiation of the object wave,and the zero-order and “twin-image” noise can be almost eliminated simultaneously.Computer numerical simulations and optical experiments are carried out to validate the effectiveness of this algorithm.