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Optical Engineering

Intercomparison Between Independent Irradiance Scales Based On Silicon Photodiode Physics, Gold-Point Blackbody Radiation, And Synchrotron Radiation
Author(s): A. R. Schaefer; R. D. Saunders; L. R. Hughey
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Paper Abstract

An intercomparison has been conducted among three independent scales of spectral irradiance: two source-based and one detector-based. Specifically, a radiometer composed of a silicon photodiode, an interference filter, and an integrating sphere was characterized and calibrated against an absolute silicon detector standard at 600 nm using a cw dye laser. This radiometer was then used to measure the spectral irradiance at 600 nm from spectral irradiance lamps calibrated against a gold-point blackbody, and the spectral irradiance at the same wavelength from the NBS electron storage ring, SURF-II. Intercomparisons of this type are an important check of the agreement between these independent radiometric techniques. It was found that the detector scale indicated a spectral irradiance at 600 nm that was 0.76% lower than predicted by the gold-point blackbody scale and 0.25% higher than predicted by the electron storage ring scale. This result implies agreement within the overall quadrature uncertainties of ±0.25% for the detector scale, ±0.84% for the gold-point blackbody scale, and ±0.60% for the electron storage ring scale.

Paper Details

Date Published: 1 July 1986
PDF: 5 pages
Opt. Eng. 25(7) 257892 doi: 10.1117/12.7973925
Published in: Optical Engineering Volume 25, Issue 7
Show Author Affiliations
A. R. Schaefer, National Bureau of Standards (United States)
R. D. Saunders, National Bureau of Standards (United States)
L. R. Hughey, National Bureau of Standards (United States)

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