Phase-only SLMs for optical pattern recognition and security systems

Yunlong Sheng; Luiz Goncalves Neto; Danny Roberge; Lixin Shen; Giles Paul Hus

doi:10.1117/12.259698

9 August 1996 Phase-only SLMs for optical pattern recognition and security systems

Yunlong Sheng, Luiz Goncalves Neto, Danny Roberge, Lixin Shen, Giles Paul Hus

Proceedings Volume 10287, Optoelectronic Devices and Systems for Processing: A Critical Review; 1028707 (1996) https://doi.org/10.1117/12.259698
Event: SPIE's 1996 International Symposium on Optical Science, Engineering, and Instrumentation, 1996, Denver, CO, United States

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.

Citation Download Citation

Yunlong Sheng, Luiz Goncalves Neto, Danny Roberge, Lixin Shen, and 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); https://doi.org/10.1117/12.259698

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