Seeley J S, Hunneman R, Whatley A
Appl Opt. 1981 Jan 1;20(1):31-9. doi: 10.1364/AO.20.000031.
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.
描述了将PbTe/II-VI多层干涉滤光技术从20微米外推至40微米以上的情况，并对PbTe的透明度进行了综述；报告了20微米以下的改进情况。描述了一种在40微米处急剧截止的复合滤光片，它使用了ZnS和As₂S₃的吸收膜、薄石英以及辅助多层干涉。描述了包含II-VI化合物的吸收滤光片，因为发现这些化合物在比其剩余射线波长更短和更长的波长处是透明的。
