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Proceedings Paper

Acousto-photorefractive holographic interferometric correlator for progressive pattern recognition using wavelet transforms
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Paper Abstract

In this paper, we describe how a photorefractive holographic interferometer may be modified to implement the wavelet transform. By placing phase-only spatial light modulators, such as acousto-optic devices, in the optical path of the sample and reference beams, it is possible to perform correlations on the phase modulated signals and then convert them into intensity modulated signals for detection and signal processing. We discuss a potential application of this architecture known as progressive pattern recognition using the wavelet transform.

Paper Details

Date Published: 9 October 1998
PDF: 12 pages
Proc. SPIE 3470, Photorefractive Fiber and Crystal Devices: Materials, Optical Properties, and Applications IV, (9 October 1998); doi: 10.1117/12.326864
Show Author Affiliations
Pankaj K. Das, Rensselaer Polytechnic Institute (United States)
Casimer M. DeCusatis, IBM Corp. (United States)
Barry L. Shoop, U.S. Military Academy (United States)
Daniel M. Litynski, U.S. Military Academy (United States)


Published in SPIE Proceedings Vol. 3470:
Photorefractive Fiber and Crystal Devices: Materials, Optical Properties, and Applications IV
Francis T. S. Yu; Shizhuo Yin, Editor(s)

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