Comparison of coherent and noncoherent optical correlators

David P. Casasent; Gregory P. House

doi:10.1117/12.169421

1 March 1994 Comparison of coherent and noncoherent optical correlators

David P. Casasent, Gregory P. House

Proceedings Volume 2237, Optical Pattern Recognition V; (1994) https://doi.org/10.1117/12.169421
Event: SPIE's International Symposium on Optical Engineering and Photonics in Aerospace Sensing, 1994, Orlando, FL, United States

Abstract

This paper presents a simplified description of coherent and noncoherent optical correlators and derives the correlator models. The advantages of the tolerances in component positioning and quality for the noncoherent correlator are explained in detail. Performance measures for correlator comparison are outlined and quantitative comparison data are provided. An implementation approach for bipolar noncoherent filters is introduced and promising results simulating a limited number of amplitude and phase levels are given. We will show that the performance of noncoherent and coherent correlators are comparable and thus the noncoherent correlator should be more widely used because of its implementation advantages.

Citation Download Citation

David P. Casasent and Gregory P. House "Comparison of coherent and noncoherent optical correlators", Proc. SPIE 2237, Optical Pattern Recognition V, (1 March 1994); https://doi.org/10.1117/12.169421

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