Open AccessSpatial bandwidth extended reconstruction for digital color Fresnel holograms
Author(s) -
Pascal Picart,
Patrice Tankam,
Denis Mounier,
Zu-jie Peng,
Junchang Li
Publication year - 2009
Publication title -
optics express
Language(s) - Uncategorized
Resource type - Journals
SCImago Journal Rank - 1.394
H-Index - 271
ISSN - 1094-4087
DOI - 10.1364/oe.17.009145
Subject(s) - holography , optics , computer science , fresnel diffraction , bandwidth (computing) , digital holography , impulse response , fresnel number , spatial frequency , diffraction , physics , mathematics , telecommunications , mathematical analysis
This paper presents a reconstruction algorithm based on the convolution formula of diffraction which uses the Fresnel impulse response of free space propagation. The bandwidth of the reconstructing convolution kernel is extended to the one of the object in order to allow the direct reconstruction of objects with size quite larger than the recording area. The spatial bandwidth extension is made possible by the use of a numerical spherical wave as a virtual reconstructing wave, thus modifying the virtual reconstruction distance and increasing the kernel bandwidth. Experimental results confirm the suitability of the proposed method in the case of the simultaneous recording of two-color digital holograms by using a spatial color multiplexing scheme.