1 July 1992 Novelty filtered optical correlator using photorefractive crystal
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We demonstrate a new optical correlator in which the correlation peak intensity is increased when the matched input object is moving. The basic configuration of the correlator is the same as a VanderLugt optical correlator consisting of a photorefractive crystal. The principle of this new correlator is based on the dynamic grating erasure property of photorefractive materials. The detail of this principle is described.
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Duncan Tsuen-Hsi Liu, Duncan Tsuen-Hsi Liu, Tien-Hsin Chao, Tien-Hsin Chao, Li-Jen Cheng, Li-Jen Cheng, } "Novelty filtered optical correlator using photorefractive crystal", Proc. SPIE 1701, Optical Pattern Recognition III, (1 July 1992); doi: 10.1117/12.138317; https://doi.org/10.1117/12.138317

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