Open AccessSpeckle noise suppression in digital holography by angular diversity with phase-only spatial light modulator
Author(s) -
Yunxin Wang,
Puhui Meng,
Dayong Wang,
Lü Rong,
Spozmai Panezai
Publication year - 2013
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.21.019568
Subject(s) - optics , spatial light modulator , holography , speckle pattern , speckle noise , digital holography , spatial frequency , electronic speckle pattern interferometry , noise (video) , phase (matter) , physics , phase modulation , speckle imaging , angular spectrum method , phase noise , computer science , diffraction , image (mathematics) , artificial intelligence , quantum mechanics
A speckle noise suppression method in digital holography is proposed by the angular diversity with a phase-only spatial light modulator (SLM). The minimal angular difference of illumination beams is quantitatively analyzed to ensure the noncorrelation of any two speckle patterns, and then the phase-only SLM is employed to generate a series of tilted illumination beams. Comparing with the typical methods, the tilted illumination beams are controlled dynamically and accurately, which makes it possible to record a large number of holograms. Finally, using an image-plane digital holographic system, 117 holograms are recorded respectively, and the synthesized reconstructed images are obtained with the greatly suppressed speckle noise which is in good agreement with the theoretical results. The experimental results demonstrate the effectiveness, repeatability, and practicability of the proposed approach.