Chinese Optics Letters, 2012, 10 (s1): S10901, Published Online: Apr. 25, 2012
Laplacian reconstruction of one single hologram using two dif ferent reconstruction distances or wavelengths Download: 544次
090.1995 Digital holography 050.1970 Diffractive optics 110.3010 Image reconstruction techniques 100.2980 Image enhancement
Abstract
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+\Delta z, or two different reconstruction wavelengths of \lambda and \lambda + \Delta to reconstruct one digital in-line hologram. Theoretical analysis shows that when the value of \Delta z or \Delta \lambda 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.
Chao Zuo, Qian Chen, Guohua Gu, Xiubao Sui, Jianle Ren. Laplacian reconstruction of one single hologram using two dif ferent reconstruction distances or wavelengths[J]. Chinese Optics Letters, 2012, 10(s1): S10901.