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Proceedings Paper

Cryogenic infrared radiometer for transferal of NIST radiometric standards
Author(s): Blake G. Crowther; Deron K. Scott; Andrew L. Shumway; Richard D. Williams; Alan Thurgood
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Paper 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.

Paper Details

Date Published: 18 June 2001
PDF: 12 pages
Proc. SPIE 4450, Harnessing Light: Optical Science and Metrology at NIST, (18 June 2001); doi: 10.1117/12.431249
Show Author Affiliations
Blake G. Crowther, Utah State Univ. and Optical Research Associates (United States)
Deron K. Scott, Utah State Univ. (United States)
Andrew L. Shumway, Utah State Univ. (United States)
Richard D. Williams, Aerojet, A GenCorp Co. (United States)
Alan Thurgood, Utah State Univ. (United States)

Published in SPIE Proceedings Vol. 4450:
Harnessing Light: Optical Science and Metrology at NIST
Carmina Londono, Editor(s)

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