Controlled Liquid Crystal Optical Filter Combined with Video Surveillance Devices

Operating in a wide temperature interval controlled liquid crystal optical filter for the visible and near-infrared spectral ranges, combined with video surveillance devices, is described. The configurations of the filter using liquid crystal cells with a twist, homeotropic and planar orientations a...

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Bibliographic Details
Published in:Journal of contemporary physics 2023-03, Vol.58 (1), p.73-76
Main Authors: Margaryan, H. L., Gasparyan, P. K., Abrahamyan, V. K., Hakobyan, N. H., Chilingaryan, H. S., Pokhsraryan, D. K., Stepanyan, G. M.
Format: Article
Language:English
Subjects:
Angular resolution
Infrared spectra
Liquid crystals
Near infrared radiation
Optical filters
Particle and Nuclear Physics
Physics
Physics and Astronomy
Surveillance
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Summary:Operating in a wide temperature interval controlled liquid crystal optical filter for the visible and near-infrared spectral ranges, combined with video surveillance devices, is described. The configurations of the filter using liquid crystal cells with a twist, homeotropic and planar orientations are considered. It is shown that the change in the transmission depending on the attached control voltage, typical for a neutral filter, is shown by the twisted cell. The effect of the filter on the angular resolution of the video camera is evaluated.
ISSN:1068-3372
1934-9378
DOI:10.1134/S1068337223010140