Correct self-assembling of spatial frequencies in super-resolution synthetic aperture digital holography
Optics Letters, Vol. 34, Issue 23, pp. 3650-3652 (2009)
http://dx.doi.org/10.1364/OL.34.003650
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Abstract
Synthetic aperture enlargement is obtained, in lensless digital holography, by introducing a diffraction grating between the object and the CCD camera with the aim of getting super-resolution. We demonstrate here that the spatial frequencies are naturally self-assembled in the reconstructed image plane when the NA is increased synthetically at its maximum extent of three times. By this approach it possible to avoid the use of the grating transmission formula in the numerical reconstruction process, thus reducing significantly the noise in the final super-resolved image. Demonstrations are reported in 1D and 2D with an optical target and a biological sample, respectively.
© 2009 Optical Society of America
OCIS Codes
(050.1950) Diffraction and gratings : Diffraction gratings
(070.6020) Fourier optics and signal processing : Continuous optical signal processing
(090.0090) Holography : Holography
(090.1760) Holography : Computer holography
(100.6640) Image processing : Superresolution
(110.0180) Imaging systems : Microscopy
ToC Category:
Holography
History
Original Manuscript: June 12, 2009
Revised Manuscript: October 14, 2009
Manuscript Accepted: October 14, 2009
Published: November 20, 2009
Virtual Issues
Vol. 5, Iss. 1 Virtual Journal for Biomedical Optics
Citation
Melania Paturzo and Pietro Ferraro, "Correct self-assembling of spatial frequencies in super-resolution synthetic aperture digital holography," Opt. Lett. 34, 3650-3652 (2009)
http://www.opticsinfobase.org/ol/abstract.cfm?URI=ol-34-23-3650
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