Speed of response analysis of optically controlled transparent photoconductor liquid crystal plates in a holographic correlator

Fiodor L. Vladimirov; Aleksander N. Chaika; Ivan E. Morichev; N. I. Pletnyova

doi:10.1117/12.155064

3 September 1993 Speed of response analysis of optically controlled transparent photoconductor liquid crystal plates in a holographic correlator

Fiodor L. Vladimirov, Aleksander N. Chaika, Ivan E. Morichev, N. I. Pletnyova

Author Affiliations +

Proceedings Volume 1978, Coherent Measuring and Data Processing Methods and Devices; (1993) https://doi.org/10.1117/12.155064
Event: Coherent Measuring and Data Processing Methods and Devices: Selected Papers, 1993, Bellingham, WA, United States

Abstract

Speed of response is a major characteristic of light space and time modulators (LSM) in coherent optical data processing, notably in holographic correlators. The response of a photoconductor-liquid crystal (PCLC) modulator is a function of the delay in the electro- optical LC response, in the PC photoresponse, and the delay caused by the redistribution of charges in the PCLC structure. In the case of high resistance PCs the redistribution makes the decisive contribution to the response. The typical values of the PCLC structure time constant in the case of high resistance semiconductors amount to tens or hundreds of milliseconds while the delay in the photoresponse is measured in single numbers of milliseconds. With typical values of the control voltage the electro-optical response of usual LCs amounts to single digits of milliseconds while the relaxation time ranges from 10 to 20 milliseconds.

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Fiodor L. Vladimirov, Aleksander N. Chaika, Ivan E. Morichev, and N. I. Pletnyova "Speed of response analysis of optically controlled transparent photoconductor liquid crystal plates in a holographic correlator", Proc. SPIE 1978, Coherent Measuring and Data Processing Methods and Devices, (3 September 1993); https://doi.org/10.1117/12.155064

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