Open AccessSuperspeckles: a new application of optical superresolution
Author(s) -
Phanindra Narayan Gundu,
Erwin Hack,
Pramod K. Rastogi
Publication year - 2005
Publication title -
optics express
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.394
H-Index - 271
ISSN - 1094-4087
DOI - 10.1364/opex.13.006468
Subject(s) - optics , speckle pattern , spatial light modulator , spatial filter , filter (signal processing) , superresolution , spatial frequency , speckle imaging , physics , optical correlator , image resolution , fourier transform , computer science , artificial intelligence , image (mathematics) , computer vision , quantum mechanics
The effect of optical superresolution on speckle correlations is studied. Simulations reveal that using a lateral superresolution pupil filter more than twice the out of plane correlation length of the clear pupil can be achieved. This means that the measurement range in speckle correlation measurements doubles. To verify the correlation length an experiment is performed using a liquid crystal (LCD) spatial light modulator as a programmable superresolution filter. The results corroborate the simulation.