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Applied Optics

Applied Optics

APPLICATIONS-CENTERED RESEARCH IN OPTICS

  • Editor: Joseph N. Mait
  • Vol. 48, Iss. 29 — Oct. 10, 2009
  • pp: 5537–5545

Aliasing-based incoherent optical spatial image processor

Melania Paturzo, Pietro Ferraro, Alexander Zlotnik, and Zeev Zalevsky  »View Author Affiliations


Applied Optics, Vol. 48, Issue 29, pp. 5537-5545 (2009)
http://dx.doi.org/10.1364/AO.48.005537


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Abstract

We present a configuration for a real-time spatial image processor that is based upon an imaging setup in which a grating with Fourier coefficients with tunable phase is attached to the object plane. The illumination that is used for the proposed concept is spatially incoherent. By proper adjusting of the magnification of the imaging system to the spatial period of the grating and the sampling grid of the camera, the aliasing effect due to the digital sampling realizes a nonuniform and tunable spectral distribution (a filter) that is applied over the spectrum of the object. Preliminary numerical and experimental demonstration of the operation principle is provided with a spatial LiNbO 3 hexagonal grating.

© 2009 Optical Society of America

OCIS Codes
(070.6110) Fourier optics and signal processing : Spatial filtering
(100.2980) Image processing : Image enhancement

ToC Category:
Image Processing

History
Original Manuscript: March 30, 2009
Revised Manuscript: July 28, 2009
Manuscript Accepted: August 18, 2009
Published: October 5, 2009

Citation
Melania Paturzo, Pietro Ferraro, Alexander Zlotnik, and Zeev Zalevsky, "Aliasing-based incoherent optical spatial image processor," Appl. Opt. 48, 5537-5545 (2009)
http://www.opticsinfobase.org/ao/abstract.cfm?URI=ao-48-29-5537


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