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Monochromatic Depolarizer Based on Liquid Crystal

Faculty of New Technologies and Chemistry, Military University of Technology, 2 gen. S. Kaliskiego St., 00-908 Warsaw, Poland
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Crystals 2019, 9(8), 387; https://doi.org/10.3390/cryst9080387
Received: 24 May 2019 / Revised: 17 July 2019 / Accepted: 22 July 2019 / Published: 28 July 2019
(This article belongs to the Special Issue Liquid Crystal Optical Device)
Polarization is a very useful parameter of a light beam in many optical measurements. Improvement of holographic systems requires optical elements which need a diffused and depolarized light beam. This paper describes a simple monochromatic depolarizer based on a pure vertically aligned liquid crystal without pretilt. In this work we present an extended description of depolarizer by analyzing its electro-optic properties measured in spatial and time domains with the use of crossed polarizers and polarimetric configurations. Crossed polarizers set-up provides information on spatial and temporal changes of microscopic textures while polarimetric measurement allows to measure voltage and time dependence of degree of polarization. Three different thicknesses, i.e., 5 μm, 10 μm and 15 μm have been manufactured in order to analyze another degree of freedom for this type of depolarizer device based on a liquid crystals’ material. Consideration of the light scattering capability of the cell is reported. View Full-Text
Keywords: depolarization; liquid crystals; Mueller matrices depolarization; liquid crystals; Mueller matrices
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Marć, P.; Bennis, N.; Spadło, A.; Kalbarczyk, A.; Węgłowski, R.; Garbat, K.; Jaroszewicz, L.R. Monochromatic Depolarizer Based on Liquid Crystal. Crystals 2019, 9, 387.

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