Open AccessSpeckle-free and grayscale hologram reconstruction using time-multiplexing technique
Author(s) -
Yasuhiro Takaki,
Masahito Yokouchi
Publication year - 2011
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.19.007567
Subject(s) - speckle pattern , holography , speckle noise , grayscale , optics , artificial intelligence , computer vision , computer science , holographic display , speckle imaging , binary number , electronic speckle pattern interferometry , multiplexing , physics , pixel , mathematics , telecommunications , arithmetic
Speckle generation is an inherent problem of holography. A speckle-reduction technique employing a time-multiplexing method is proposed. Object points constituting a reconstructed image are divided into multiple object point groups consisting of sparse object points, and the object point groups are displayed time sequentially. The sparseness and temporal summation enable the suppression of speckle generation. The object point group is decomposed into multiple bit planes to represent the grayscale of object points, and binary holograms are generated from the bit plane patterns by using a half-zone plate technique. The binary holograms are displayed by a high-speed spatial light modulator.