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Optical, Mechanical And Thermal Properties Of Calcium Lanthanum Sulphide Compared With The Properties Of Current 8-12 µm Window Materials
Author(s): J A Savage; M J Edwards
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Paper Abstract

The physical property data reported for calcium lanthanum sulphide indicates that it would be an attractive material for high performance 8-12 μm FLIR window applications. However, a number of other available materials may also be considered for aircraft windows operating at temperatures up to 200°C. These are low resistivity germanium (70°C to 100°C), gallium arsenide, multi spectral and standard grade zinc sulphide, zinc sulphide/zinc selenide laminate and zinc selenide. A comparison is presented of the transmittance properties of these materials at room temperature and at 175°C together with room temperature data on the reported optical, mechanical and thermal properties. A qualitative assessment of the likely effectiveness of calcium lanthanum sulphide as a FLIR window material in relation to these existing materials is presented.

Paper Details

Date Published: 17 January 1989
PDF: 6 pages
Proc. SPIE 0968, Ceramics and Inorganic Crystals for Optics, Electro-Optics, and Nonlinear Conversion, (17 January 1989); doi: 10.1117/12.948121
Show Author Affiliations
J A Savage, Royal Signals and Radar Establishment (United States)
M J Edwards, Royal Signals and Radar Establishment (United States)

Published in SPIE Proceedings Vol. 0968:
Ceramics and Inorganic Crystals for Optics, Electro-Optics, and Nonlinear Conversion
Robert W. Schwartz, Editor(s)

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