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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)
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Abstract

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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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited (CC BY 4.0).
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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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