Open AccessEncoding multiple holograms for speckle-noise reduction in optical display
Author(s) -
Pasquale Memmolo,
Vittorio Bianco,
Melania Paturzo,
Bahram Javidi,
Paolo A. Netti,
Pietro Ferraro
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.22.025768
Subject(s) - holography , speckle pattern , optics , wavefront , speckle noise , digital holography , spatial light modulator , holographic display , computer science , iterative reconstruction , noise reduction , noise (video) , spatial frequency , physics , artificial intelligence , image (mathematics)
In digital holography (DH) a mixture of speckle and incoherent additive noise, which appears in numerical as well as in optical reconstruction, typically degrades the information of the object wavefront. Several methods have been proposed in order to suppress the noise contributions during recording or even during the reconstruction steps. Many of them are based on the incoherent combination of multiple holographic reconstructions achieving remarkable improvement, but only in the numerical reconstruction i.e. visualization on a pc monitor. So far, it has not been shown the direct synthesis of a digital hologram which provides the denoised optical reconstruction. Here, we propose a new effective method for encoding in a single complex wavefront the contribution of multiple incoherent reconstructions, thus allowing to obtain a single synthetic digital hologram that show significant speckle-reduction when optically projected by a Spatial Light Modulator (SLM).