Physical Effects In IR-coating Materials

A low-temperature model is described for infrared multilayer filters containing PbTe (or other semiconductor) and ZnSe (or other II/VI). The model is based on dielectric dispersion with semiconductor carrier dispersion added. It predicts an improved performance on cooling such as would be useful to avoid erroneous signals from the optics in spaceflight radiometers. Agreement with measurement is obtained over the initial temperature range 70-400 K and wavelength range 2.5-20 mu m.

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Performance model for cooled IR filters

Seeley¹,

Hawkins²,

Hunneman³

1988

J. Phys. D: Appl. Phys.

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Physical Effects In IR-coating Materials

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Performance model for cooled IR filters

Performance model for cooled IR filters

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