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Applied Optics

Applied Optics

APPLICATIONS-CENTERED RESEARCH IN OPTICS

  • Vol. 32, Iss. 17 — Jun. 10, 1993
  • pp: 3108–3112

Performance analysis of optical shadow-casting correlators

Kannan Raj, Dennis W. Prather, Ravindra A. Athale, and Joseph N. Mait  »View Author Affiliations


Applied Optics, Vol. 32, Issue 17, pp. 3108-3112 (1993)
http://dx.doi.org/10.1364/AO.32.003108


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Abstract

We analyze the performance of two optical shadow-casting image correlators that use two-dimensional source arrays to encode the system point-spread function (PSF). The analysis of a standard shadow-casting correlator suggests that the angular divergence of the source array is a critical parameter in the determination of the maximum space–bandwidth product of the image and of the PSF that can be used with such a system. Further, the energy efficiency of a standard shadow-casting correlator is related inversely to the size of the PSF. We show that the constraints on energy efficiency and on the space–bandwidth product of the PSF can be overcome by beam steering the source elements. A modified shadow-casting correlator is proposed that uses phase-only blazed gratings to beam steer the sources. Experimental results generated by a mechanically beam-steered array are presented.

© 1993 Optical Society of America

History
Original Manuscript: September 4, 1992
Published: June 10, 1993

Citation
Kannan Raj, Dennis W. Prather, Ravindra A. Athale, and Joseph N. Mait, "Performance analysis of optical shadow-casting correlators," Appl. Opt. 32, 3108-3112 (1993)
http://www.opticsinfobase.org/ao/abstract.cfm?URI=ao-32-17-3108


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References

  1. A. B. VanderLugt, “Signal detection by complex spatial filtering,” IEEE Trans. Inf. Theory IT-10, 139–145 (1964). [CrossRef]
  2. L. S. G. Kovasnay, A. Arman, “Optical autocorrelation measurement of two-dimensional random patterns,” Rev. Sci. Instrum. 28, 793 (1957). [CrossRef]
  3. S. Jutamulia, T. W. Lin, F. T. S. Yu, “Real-time noncoherent correlator using liquid crystal television,” Opt. Commun. 64, 115–119 (1987). [CrossRef]
  4. Y. Ichioka, J. Tanida, “Optical parallel logic gates using a shadow-casting system for optical digital computing,” Proc. IEEE 72, 787–801 (1984). [CrossRef]
  5. Y. Li, A. Kostrzewski, D. H. Kim, G. Eichmann, “Compact parallel real-time programmable optical morphological image processor,” Opt. Lett. 14, 981–983 (1989). [CrossRef] [PubMed]
  6. A. Louri, “Efficient optical implementation method for symbolic substitution logic based on shadow casting,” Appl. Opt. 28, 3264–3267 (1989).

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