28 March 1995 Full-complex modulation spatial light modulator using two coupled-mode modulation liquid crystal televisions
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Abstract
We obtain electrically switchable optical complex amplitude modulations with two commercial twisted nematic liquid crystal televisions (LCTV's) which are in the phase/amplitude coupled modulation modes. The condition for the full complex modulation is that one of the coupled mode LCTV's provides the fill range of 2(pi) phase modulation. A look-up table encoding method is proposed that permits to compensate and correct the coupling and nonlinearity in the modulations of the individual LCTV's. A simple wedged share plate interferometer is proposed to measure the phase modulation. Based on the theory of the twisted nematic LCTV, experimental adjustments for the phase-mostly and amplitude modulation LCTV's is presented. Optical Fresnel and Fourier complex amplitude holograms and optical complex amplitude correlation filters are shown.
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Danny Roberge, Danny Roberge, Luiz Goncalves Neto, Luiz Goncalves Neto, Yunlong Sheng, Yunlong Sheng, } "Full-complex modulation spatial light modulator using two coupled-mode modulation liquid crystal televisions", Proc. SPIE 2490, Optical Pattern Recognition VI, (28 March 1995); doi: 10.1117/12.205800; https://doi.org/10.1117/12.205800
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