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Optics Letters

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  • Vol. 15, Iss. 13 — Jul. 1, 1990
  • pp: 743–745

Spatial amplification: an image-processing technique using the selective amplification of spatial frequencies

Tallis Y. Chang, John H. Hong, and Pochi Yeh  »View Author Affiliations


Optics Letters, Vol. 15, Issue 13, pp. 743-745 (1990)
http://dx.doi.org/10.1364/OL.15.000743


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Abstract

A novel technique of processing optical images that we call spatial amplification is proposed and demonstrated. The basic idea is to amplify coherently a set of selected spatial frequency components of an image. Unlike in the usual spatial filtering techniques, in which the components are selectively blocked out at the Fourier plane of a coherent processor, spatial amplification does not discard any of the incident image information. The advantages of the proposed technique over spatial filtering include high energy efficiency and the possibility for cascading several stages. In the demonstrated experiments, the required amplification is provided by two-beam energy coupling in a photorefractive BaTiO3 crystal with a nonuniform pump beam.

© 1990 Optical Society of America

History
Original Manuscript: December 26, 1989
Manuscript Accepted: April 3, 1990
Published: July 1, 1990

Citation
Tallis Y. Chang, John H. Hong, and Pochi Yeh, "Spatial amplification: an image-processing technique using the selective amplification of spatial frequencies," Opt. Lett. 15, 743-745 (1990)
http://www.opticsinfobase.org/ol/abstract.cfm?URI=ol-15-13-743


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References

  1. J. W. Goodman, Introduction to Fourier Optics (McGraw-Hill, San Francisco, Calif., 1968).
  2. J. Tsujiuchi, in Progress in Optics, E. Wolf, ed. (North-Holland, Amsterdam, 1963), Vol. II, Chap. IV.
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  4. Y. Fainman, E. Klancnik, S. H. Lee, Opt. Eng. 25, 228 (1986).
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