Absolute radiation detector

John E. Martin

doi:10.1117/12.257149

8 November 1996 Absolute radiation detector

John E. Martin

Proceedings Volume 2815, Optical Radiation Measurements III; (1996) https://doi.org/10.1117/12.257149
Event: SPIE's 1996 International Symposium on Optical Science, Engineering, and Instrumentation, 1996, Denver, CO, United States

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.

Citation Download Citation

John E. Martin "Absolute radiation detector", Proc. SPIE 2815, Optical Radiation Measurements III, (8 November 1996); https://doi.org/10.1117/12.257149

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