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Updated: Jun 14, 2026

Bringing the Visible Universe into Focus with Robo-AO
Published on: February 12, 2013
Far infrared filters for the Galileo-Jupiter and other missions
Abstract:
Extrapolation of PbTe/II-VI multilayer interference-filter technique from 20 to beyond 40 microm is described and PbTe transparency reviewed; improvements below 20 microm are reported. A composite filter cutting on steeply at 40 microm is described that uses absorptive films of ZnS and As(2)S(3), thin quartz, and supplementary multilayer interference. Absorptive filters are described containing the II-VI compounds since these are found transparent at wavelengths shorter and longer than their reststrahl.
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