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Proceedings Paper

Optical element for automatically darkening welding filters
Author(s): Edward Nowinowski-Kruszelnicki
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Paper Abstract

The goal of this paper is to present the construction and performance data of the optical shutter developed for automatical soft gate for face shield during the welding process. High level of radiation protection combining both a fast response time and a low transmittance in a wide viewing cone were the main requirements of the device. To find applications it was critical to minimize driving power consumption because of solar cells charging of battery supply. By positioning two identical 6 micrometers liquid-crystal cells with (Delta) nd equals 0.48 between three linear polarizes with crossed rubbing directions at neighbor substrates and application of high purity liquid mixture with dielectric constant values e (parallel) equals 6.38 and e (perpendicular) equals 3.1, respectively, fast response, low transmission and low power consumption of the optical element have been obtained.

Paper Details

Date Published: 1 February 1998
PDF: 4 pages
Proc. SPIE 3318, Liquid Crystals: Physics, Technology, and Applications, (1 February 1998); doi: 10.1117/12.300038
Show Author Affiliations
Edward Nowinowski-Kruszelnicki, Military Univ. of Technology (Poland)

Published in SPIE Proceedings Vol. 3318:
Liquid Crystals: Physics, Technology, and Applications
Jolanta Rutkowska; Stanislaw J. Klosowicz; Jerzy Zielinski; Jozef Zmija, Editor(s)

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