Experimental systems implementation of a hybrid optical–digital correlator

Sharp, J. H. et al. (1999) Experimental systems implementation of a hybrid optical–digital correlator. Applied Optics, 38(29), p. 6116. (doi: 10.1364/AO.38.006116)

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Publisher's URL: http://dx.doi.org/10.1364/AO.38.006116


A high-speed hybrid optical–digital correlator system was designed, constructed, modeled, and demonstrated experimentally. This correlator is capable of operation at approximately 3000 correlations/s. The input scene is digitized at a resolution of 512 × 512 pixels and the phase information of the two-dimensional fast Fourier transform calculated and displayed in the correlator filter plane at normal video frame rates. High-fidelity reference template images are stored in a phase-conjugating optical memory placed at the nominal input plane of the correlator and reconstructed with a high-speed acousto-optic scanner; this allows for cross correlation of the entire reference data set with the input scene within one frame period. A high-speed CCD camera is used to capture the correlation-plane image, and rapid correlation-plane processing is achieved with a parallel processing architecture.

Item Type:Articles
Glasgow Author(s) Enlighten ID:Watson, Dr Ian and Chatwin, Prof Christopher and Young, Dr Rupert and Sharp, Dr James and Scott, Professor Brian
Authors: Sharp, J. H., MacKay, N. E., Tang, P. C., Watson, I. A., Scott, B. F., Budgett, D. M., Chatwin, C. R., Young, R. C. D., Tonda, S., Huignard, J.-P., Slack, T. G., Collings, N., Pourzand, A.-R., Duelli, M., Grattarola, A., and Braccini, C.
College/School:College of Science and Engineering
College of Science and Engineering > School of Engineering > Systems Power and Energy
Journal Name:Applied Optics
Publisher:Optical Society of America
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