1 September 1992 Influence of water ice absorption on transmission for a 10.5 to 12.5 μm filter window
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Optical Engineering, 31(9), (1992). doi:10.1117/12.58852
Abstract
We present a study of the effects of a layer of water ice on the transmission of an infrared bandpass filter/window in the 10.5- to 12.5-μm spectral band. Computed spectral transmission is presented for a model consisting of water ice thicknesses of 20, 200, 2000, and 20,000 nm on the blocking stack side of a bandpass filter design. A ray angle of 20 deg is used to simulate the conditions at a filter situated in front of a cooled detector, where water ice might accumulate. The results show severe degradation in transmission for water ice thicknesses greater than 200 nm.
Frank Jacyszyn, Samuel F. Pellicori, "Influence of water ice absorption on transmission for a 10.5 to 12.5 μm filter window," Optical Engineering 31(9), (1 September 1992). http://dx.doi.org/10.1117/12.58852
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KEYWORDS
Bandpass filters

Absorption

Germanium

Sensors

Water

Infrared radiation

Optical filters

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