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Proceedings Paper

Two-color Mach 3 IR coating for TAMD systems
Author(s): Caspar C. Clark; David Haddow
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Paper Abstract

Using well proven boron phosphide (BP) technology, Thales Optronics (formally Barr & Stroud Ltd.) have expanded the range of IR materials successfully protected to include gallium arsenide. BP has already been used as part of a dual band coating for FLIR grade ZnS which performs well environmentally and is currently used on several prototype dome systems. Having a hardness lower than germanium, gallium arsenide is perhaps not the first choice for applications required to perform well in harsh conditions however there are some other useful properties, among these is the recently reported ability to create low resistivity material for stealth applications and low free-carrier absorption at elevated temperatures. This paper will look at some of the measured optical and physical characteristics of this new substrate/coating system including rain erosion tested by whirling arm and solid particle erosion. In addition some attention will be given to the actual vs. theory performances and envisaged practical applications.

Paper Details

Date Published: 7 September 2001
PDF: 8 pages
Proc. SPIE 4375, Window and Dome Technologies and Materials VII, (7 September 2001); doi: 10.1117/12.439189
Show Author Affiliations
Caspar C. Clark, Thales Optronics (United Kingdom)
David Haddow, Thales Optronics (United Kingdom)

Published in SPIE Proceedings Vol. 4375:
Window and Dome Technologies and Materials VII
Randal W. Tustison, Editor(s)

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