Enhancing the Quality of Sampled Phase-Only Hologram (SPOH) Based on Time-Division Comb Filtering

Peter W. M. Tsang; Jung-Ping Liu; Hoson Lam; Ting-Chung Poon

doi:10.3390/app10082732

Author(s)

Peter W. M. Tsang
Jung-Ping Liu
Hoson Lam
Ting-Chung Poon

Related Research Unit(s)

Department of Electrical Engineering

Detail(s)

Original language	English
Article number	2732
Journal / Publication	Applied Sciences (Switzerland)
Volume	10
Issue number	8
Online published	15 Apr 2020
Publication status	Published - Apr 2020

Link(s)

DOI	DOI https://doi.org/10.3390/app10082732 Final Published version
	Check@CityULib
Attachment(s)	Documents 46337043.pdf Final Published version, 4.72 MB, PDF Publisher's Copyright Statement This full text is made available under CC-BY 4.0. https://creativecommons.org/licenses/by/4.0/
Link to Scopus	https://www.scopus.com/record/display.uri?eid=2-s2.0-85085375999&origin=recordpage
Permanent Link	https://scholars.cityu.edu.hk/en/publications/publication(a5d767b7-bca9-4dcd-b0a8-e529b5de08b2).html

Abstract

Generation of digital phase-only Fresnel holograms is an important research area in digital holography, as it leads to a substantial simplification of a holographic display system. However, the quality of the reconstructed image of a hologram without the magnitude component is heavily degraded. The problem can be reduced by down-sampling the intensity of an image prior to generating the hologram. The method, referred to as “sampled phase-only hologram” (SPOH) generation, results in reconstructed images that are masked with the pattern of the down-sampling lattice. This paper reports a novel, low complexity method to alleviate this problem through the concept of comb filtering. Results reveal prominent enhancement on the reconstructed image of a SPOH.