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Applied Optics

Applied Optics

APPLICATIONS-CENTERED RESEARCH IN OPTICS

  • Editor: James C. Wyant
  • Vol. 45, Iss. 28 — Oct. 1, 2006
  • pp: 7325–7333

Joint transform correlator with spatial code division multiplexing

Zeev Zalevsky, Avi Rubner, Javier García, Pascuala Garcia-Martinez, Carlos Ferreira, and Emanuel Marom  »View Author Affiliations


Applied Optics, Vol. 45, Issue 28, pp. 7325-7333 (2006)
http://dx.doi.org/10.1364/AO.45.007325


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Abstract

A joint transform correlator may suffer from overlapping of the zero diffraction order of the output, which does not contain relevant information, and the correlation peaks that appear in the first diffraction orders if objects are not sufficiently separated. Such overlapping significantly reduces the signal-to-noise ratio of the identification process. We propose a novel approach based on code division multiplexing technique in which the contrast of the identification peaks is significantly enhanced. The approach does not include placing the two objects side by side but rather includes code multiplexing them. Moreover, the code division multiplexing technique allows the space–bandwidth product to be improved. Optical implementation results are given.

© 2006 Optical Society of America

OCIS Codes
(070.2580) Fourier optics and signal processing : Paraxial wave optics
(070.2590) Fourier optics and signal processing : ABCD transforms
(070.5010) Fourier optics and signal processing : Pattern recognition

ToC Category:
Fourier Optics and Optical Signal Processing

History
Original Manuscript: January 10, 2006
Revised Manuscript: April 20, 2006
Manuscript Accepted: June 21, 2006

Citation
Zeev Zalevsky, Avi Rubner, Javier García, Pascuala Garcia-Martinez, Carlos Ferreira, and Emanuel Marom, "Joint transform correlator with spatial code division multiplexing," Appl. Opt. 45, 7325-7333 (2006)
http://www.opticsinfobase.org/ao/abstract.cfm?URI=ao-45-28-7325

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