Composite vacuum-tight window for simultaneous far-infrared and optical observations

We analyse the optimization of windows which must transmit in the visible and in the far-infrared. The mechanical strength and the far-infrared transmission of available materials (mylar, TPX, quartz, sapphire, silica, diamond, plexiglass) are reviewed. We describe a composite window which is vacuum...

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Bibliographic Details
Published in:Infrared physics 1980, Vol.20 (1), p.53-57
Main Authors: Coron, N., Moalic, J.P., Dambier, G., Baluteau, J.P.
Format: Article
Language:English
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Summary:We analyse the optimization of windows which must transmit in the visible and in the far-infrared. The mechanical strength and the far-infrared transmission of available materials (mylar, TPX, quartz, sapphire, silica, diamond, plexiglass) are reviewed. We describe a composite window which is vacuum-tight and can withstand differential pressures of 1 bar. This window has permitted successful observations on the K.A.O. airborne telescope with transmission higher than 70% in the 50–200μ range.
ISSN:0020-0891
DOI:10.1016/0020-0891(80)90007-X