Cooled filters 16-42µm for FIR astronomy
Seeley, J.S., Hunneman, R. and Whatley, A. (1980) Cooled filters 16-42µm for FIR astronomy. In: Spiro, I.J. (ed.) Modern utilization of infrared technology. Proceedings of SPIE, VI (253). SPIE, pp. 266-273. ISBN 9780892522828
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The design and manufacture of dielectric-film interference filters for cooled FIR stronmy is described. The bands are 16.5-21.5µm, 17.5-19.5µm, 19.5-21.5µm and 27µm cut on. The films are PbTe/CdSe and the substrates are CdTe (some 1/2 mm thick), without absorption in the region: KRS-6 films are used for antireflection.
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