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Infrared Liquid Crystal Tunable Filters

Published online by Cambridge University Press:  03 September 2012

Shin-Tson Wu  and
Chiung-Sheng Wu
Shin-Tson Wu
Affiliation:
Hughes Research Laboratories, 3011 Malibu Canyon Road, Malibu, CA 90265
Chiung-Sheng Wu
Affiliation:
Hughes Research Laboratories, 3011 Malibu Canyon Road, Malibu, CA 90265
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Abstract

Computer simulations on Fabry-Perot liquid crystal tunable filters are performed in the 3–5 and 8–12 μm bands and some discrete laser lines. Effects of transmittance, contrast ratio and response time on liquid crystal birefringence, layer thickness, absorption coefficient and reflectivity of mirrors are analyzed. Absorption spectra and responsible mechanisms of liquid crystals in the 2.5–20 μm region are studied. The fluorinated tolane and diphenyl-diacetylenes and dialkyl diphenyldiacetylenes are found to possess low absorption in the mid-IR range. Mixtures of these compounds will find useful applications for the proposed IR tunable filters.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 479: Symposium S – Materials for Optical Limiting II , 1997 , 215
Copyright
Copyright © Materials Research Society 1997

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