Spectrophotometer-Type Filters of the Highest Possible Performance, 2.5-40µm

J S Seeley, R Hunneman, A Whatley

Infrared Physics, Vol 19, Pages 429-435 (1979)


The conceptual design and manufacture of order-sorting spectrophotometer filters are described as cutting on, for example, at 13 and 22µm : PbTe and ZnS or CdTe layers are used and a CdTe substrate is indicated to eliminate absorption at 16-22µm. Performance is assessed for a filter of ultimate steepness and transmission, the blocked transmission being below 10-4.

DOI: 10.1016/0020-0891(79)90054-X

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