Precision large-area low- and medium-temperature blackbody sources

Victor I. Sapritsky; Sergei N. Mekhontsev; Alexander V. Prokhorov; Konstantin A. Sudarev; Vladimir B. Khromchenko; Mikhail L. Samoilov

doi:10.1117/12.331338

18 November 1998 Precision large-area low- and medium-temperature blackbody sources

Victor I. Sapritsky, Sergei N. Mekhontsev, Alexander V. Prokhorov, Konstantin A. Sudarev, Vladimir B. Khromchenko, Mikhail L. Samoilov

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Proceedings Volume 3437, Infrared Spaceborne Remote Sensing VI; (1998) https://doi.org/10.1117/12.331338
Event: SPIE's International Symposium on Optical Science, Engineering, and Instrumentation, 1998, San Diego, CA, United States

Abstract

Radiation temperature calibrations of IR radiometers and imaging systems, pre-launch characterization of spaceborne optical sensors require low and medium-background test facilities, equipped with reference blackbodies for full aperture calibration. Such extended area blackbodies have been recently developed and characterized by VNIIOFI and Vega International, Inc. Target technical specifications for the low temperature blackbody include 100 mm full aperture, plus or minus 12 degrees viewing angles, 0.999 effective spectral emissivity in 3 micrometer to 15 micrometer band, 100 K to 450 K temperature range, 50 mK temperature uniformity across aperture and, finally, 30 mK temperature setting/measurement accuracy. Monte Carlo technique and finite element method were employed for computer modeling of temperature distributions and effective emissivities of radiating cavities consisting of V-grooved flat bottom and particularly profiled reflector. The design features and technical specifications of blackbodies, developed for operation in high vacuum conditions in the temperature range from 100 K to 900 K, are presented. Results of investigation confirm applicability of the selected approach, though leaving space for improvement of blackbodies performance. Main directions of further research and development are discussed.

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Victor I. Sapritsky, Sergei N. Mekhontsev, Alexander V. Prokhorov, Konstantin A. Sudarev, Vladimir B. Khromchenko, and Mikhail L. Samoilov "Precision large-area low- and medium-temperature blackbody sources", Proc. SPIE 3437, Infrared Spaceborne Remote Sensing VI, (18 November 1998); https://doi.org/10.1117/12.331338

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