Optical joint transform correlator for multiple patterns

Takumi Minemoto

doi:10.1117/12.346784

29 April 1999 Optical joint transform correlator for multiple patterns

Takumi Minemoto

Proceedings Volume 3729, Selected Papers from International Conference on Optics and Optoelectronics '98; (1999) https://doi.org/10.1117/12.346784
Event: Selected Papers from the International Conference on Optics and Optoelectronics, 1998, Dehradun, India

Abstract

A subtracted joint transform correlator, a kind of nonlinear joint transform correlator, was investigated and constructed using only optical components. In the correlator, a holographic interferometer was used for subtracting an obstructive power spectrum from the joint power spectrum of the input image that consisted of an object pattern and multiple reference patterns. A photorefractive crystal was used as a hologram recorder. At the same time, in a hybrid nonlinear joint transform correlator, demands for the dynamic ranges of a spatial light modulator and a photometric measurement device were investigated by computer simulations.

Citation Download Citation

Takumi Minemoto "Optical joint transform correlator for multiple patterns", Proc. SPIE 3729, Selected Papers from International Conference on Optics and Optoelectronics '98, (29 April 1999); https://doi.org/10.1117/12.346784

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