Novel approach to real-time joint-Fourier transform correlation

Ting-Chung Poon; Ronald J. Pieper

doi:10.1117/12.34769

1 July 1990 Novel approach to real-time joint-Fourier transform correlation

Ting-Chung Poon, Ronald J. Pieper

Proceedings Volume 1319, Optics in Complex Systems; (1990) https://doi.org/10.1117/12.34769
Event: 15th International Optics in Complex Systems, 1990, Garmisch, Germany

Abstract

Current methods for real-time optical correlation employing a jointFourier transform approach use a spatial light modulator (SLM) in the focal plane to store the interference intensity which is subsequently read out by coherent light. Because the resolution required for accurate representation of the image transform is extremely high the spatial light modulators which meet the specifications are prohibitively expensive. We propose a novel approach to jointFourier transform correlation (JTC). The method obviates the use of the spatial light modulator in the focal plane and still preserves the real time aspects of the measurements. The approach incorporates the use of acousto-optic technology for optical mixing SLMs for image representation and electronically tuned detection of the heterodyne optical signal.

Citation Download Citation

Ting-Chung Poon and Ronald J. Pieper "Novel approach to real-time joint-Fourier transform correlation", Proc. SPIE 1319, Optics in Complex Systems, (1 July 1990); https://doi.org/10.1117/12.34769

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