Cryogenic infrared radiometer for transferal of NIST radiometric standards

Blake G. Crowther; Deron K. Scott; Andrew L. Shumway; Richard D. Williams; Alan Thurgood

doi:10.1117/12.431249

18 June 2001 Cryogenic infrared radiometer for transferal of NIST radiometric standards

Blake G. Crowther, Deron K. Scott, Andrew L. Shumway, Richard D. Williams, Alan Thurgood

Proceedings Volume 4450, Harnessing Light: Optical Science and Metrology at NIST; (2001) https://doi.org/10.1117/12.431249
Event: International Symposium on Optical Science and Technology, 2001, San Diego, CA, United States

Abstract

The Space Dynamics Laboratory at Utah State University designed and constructed two identical cryogenic mid- infrared radiometers that will be used as NIST-traceable radiometric calibration transfer standards. The radiometer design is similar to the NIST BXR radiometer and thus may be calibrated at NIST using the same sources and procedures used with the BXR. Important features of these radiometers include a single element, chopped indium antimonide detector cooled by a Stirling-cycle cryocooler, two 8-position filter wheels populated with spectral and neutral density filters, and an indium antimonide focal plane array (FPA) that can be temporarily positioned at the field stop for alignment and diagnostics. This paper presents the design and results of the as-built optical and thermal performance of these radiometers. It also presents the testing set up and calibration philosophy and approach.

Citation Download Citation

Blake G. Crowther, Deron K. Scott, Andrew L. Shumway, Richard D. Williams, and Alan Thurgood "Cryogenic infrared radiometer for transferal of NIST radiometric standards", Proc. SPIE 4450, Harnessing Light: Optical Science and Metrology at NIST, (18 June 2001); https://doi.org/10.1117/12.431249

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