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

Pankaj K. Das; Casimer M. DeCusatis; Barry L. Shoop; Daniel M. Litynski

doi:10.1117/12.326864

9 October 1998 Acousto-photorefractive holographic interferometric correlator for progressive pattern recognition using wavelet transforms

Pankaj K. Das, Casimer M. DeCusatis, Barry L. Shoop, Daniel M. Litynski

Author Affiliations +

Proceedings Volume 3470, Photorefractive Fiber and Crystal Devices: Materials, Optical Properties, and Applications IV; (1998) https://doi.org/10.1117/12.326864
Event: SPIE's International Symposium on Optical Science, Engineering, and Instrumentation, 1998, San Diego, CA, United States

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.

Citation Download Citation

Pankaj K. Das, Casimer M. DeCusatis, Barry L. Shoop, and Daniel M. Litynski "Acousto-photorefractive holographic interferometric correlator for progressive pattern recognition using wavelet transforms", Proc. SPIE 3470, Photorefractive Fiber and Crystal Devices: Materials, Optical Properties, and Applications IV, (9 October 1998); https://doi.org/10.1117/12.326864

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