Open AccessSingle shot high resolution digital holography
Author(s) -
Kedar Khare,
P. T. Samsheer Ali,
Joby Joseph
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.21.002581
Subject(s) - holography , optics , speckle pattern , image quality , computer science , speckle noise , fourier transform , digital holography , fresnel diffraction , holographic display , digital holographic microscopy , computer vision , physics , diffraction , image (mathematics) , quantum mechanics
We demonstrate a novel computational method for high resolution image recovery from a single digital hologram frame. The complex object field is obtained from the recorded hologram by solving a constrained optimization problem. This approach which is unlike the physical hologram replay process is shown to provide high quality image recovery even when the dc and the cross terms in the hologram overlap in the Fourier domain. Experimental results are shown for a Fresnel zone hologram of a resolution chart, intentionally recorded with a small off-axis reference beam angle. Excellent image recovery is observed without the presence of dc or twin image terms and with minimal speckle noise.