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Proceedings Paper

Absolute radiation detector
Author(s): John E. Martin
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Paper Abstract

An absolute radiation detector (a cryogenic radiometer) is being developed to replace the existing UK primary national standard cryogenic radiometer with an improved uncertainty. The cryogenic radiometer will be capable of measuring black body radiation and laser radiation with an uncertainty approaching 10 ppm. From these measurements it will be possible to determine the fundamental constant, the Stefan Boltzmann constant, confirming the radiometer as an absolute detector, and link this determination to the SI unit of luminous intensity, the candela. Thus detector and source based scales/standards will be tied to an invariant physical quantity ensuring their long-term stability.

Paper Details

Date Published: 8 November 1996
PDF: 11 pages
Proc. SPIE 2815, Optical Radiation Measurements III, (8 November 1996); doi: 10.1117/12.257149
Show Author Affiliations
John E. Martin, National Physical Lab. (United Kingdom)


Published in SPIE Proceedings Vol. 2815:
Optical Radiation Measurements III
James M. Palmer, Editor(s)

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