Joint transform correlator with spatial code division multiplexing
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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