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- W1661750052 abstract "Abstract : The temperature coefficient of refractive index for germanium was determined in the 8-12 micrometers and 3-5 micrometers wavebands. The Strehl intensity ratio and frequency response of an optical system are related to a lens temperature changes, and a simple factor for a comparison of different lens materials is included. The relative change in minimum resolvable temperature difference MRTD of a thermal imaging system is shown for a defocused optical system, where the defocus is related to a lens temperature change. It is shown that the criterion for a good optical performance may be applied to the relative change in MRTD for a thermal imager, and that the Marechal approximation to the Strehl ratio may be used to determine a tolerance upon a change in lens temperature. (Author)" @default.
- W1661750052 created "2016-06-24" @default.
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- W1661750052 date "1981-01-01" @default.
- W1661750052 modified "2023-09-27" @default.
- W1661750052 title "The influence of the temperature coefficient of refractive index on a thermal imager" @default.
- W1661750052 hasPublicationYear "1981" @default.
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