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Cooled filters 16-42µm for FIR astronomy

By J.S. Seeley, Roger Hunneman and A. Whatley


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

Publisher: SPIE
Year: 1980
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