9 August 1996 Phase-only SLMs for optical pattern recognition and security systems
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Abstract
Original experimental techniques for obtaining the phase-only modulation and the complex amplitude modulation with the commercial twisted nematic liquid crystal televisions (LCTV) are described. The techniques are based on the Jones matrix theoretical analysis. We use the programmable phase-mostly LCTV to optically implement the phase-only matched filters, phase-only circular harmonic filters, phase-only synthetic discriminant functions and the adaptive composite wavelet matched filters for pattern recognition. We also implement the phase-only computer generated holograms, speckle-free kinoforms and optical kinoform encryption using random phase encoding for security applications.
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Yunlong Sheng, Yunlong Sheng, Luiz Goncalves Neto, Luiz Goncalves Neto, Danny Roberge, Danny Roberge, Lixin Shen, Lixin Shen, Giles Paul Hus, Giles Paul Hus, } "Phase-only SLMs for optical pattern recognition and security systems", Proc. SPIE 10287, Optoelectronic Devices and Systems for Processing: A Critical Review, 1028707 (9 August 1996); doi: 10.1117/12.259698; https://doi.org/10.1117/12.259698
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