Open AccessGeneration of phase-only Fresnel hologram based on down-sampling
Author(s) -
P. W. M. Tsang,
Y. T. Chow,
TingChung Poon
Publication year - 2014
Publication title -
optics express
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.394
H-Index - 271
ISSN - 1094-4087
DOI - 10.1364/oe.22.025208
Subject(s) - holography , optics , phase (matter) , fresnel zone , fresnel number , fresnel diffraction , image quality , digital holography , holographic display , light intensity , noise (video) , computer science , physics , image (mathematics) , diffraction , artificial intelligence , quantum mechanics
We present a novel non-iterative method for generating phase-only Fresnel holograms. The intensity image of the source object scene is first down-sampled with uniform grid-cross lattices. A Fresnel hologram is then generated from the intensity and the depth information of the sampled object points. Subsequently, only the phase component of the hologram is preserved, resulting in a pure phase hologram that we call the sampled-phase-only hologram (SPOH). Experimental evaluation reveals that the numerical, as well as the optical reconstructed images of the proposed phase-only hologram derived with our method are of high visual quality. Moreover, the reconstructed optical image is brighter, and less affected by phase noise contamination on the hologram as compared with those generated with existing error-diffusion approaches.