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Results of a CCPR Intercomparision of Spectral Radiance Measurements in the Air-Ultraviolet



R P. Lambe, Charles E. Gibson, J Hollandt, Robert D. Saunders


An intercomparision of the spectral radiance scales of the National Physical Laboratory (NPL), the National Institute of Standards and Technology (NIST) and the Physikalisch-Technische Bundesanstalt (PTB) was carried out in 1993 and 1994, under the auspices of the Comite Consultatif de Photometrie et Radiometrie (CCPR) of the Comite International des Poids et Measures (CIPM). The intercomparision covered the spectral range 200 nm to 400 nm. The transfer standards were deuterium discharge lamps, with examples of the lamps used at each of the participating laboratories included in the intercomparision to aid in the identification of systematic errors and to gether information on their relative performance. The scales of the laboratories agreed within the combined uncertainties. However, the combined uncertainties were high (an expanded uncertainty with a coverage factor of k=2 of up to 8%), and further work is required to reduce the uncertainties associated with the spectral radiance scales of each laboratory. Little difference was observed in the performance of the three different transfer standard sources used.


deuteriun lamps, intercomparision, spectral radiance


Lambe, R. , Gibson, C. , Hollandt, J. and Saunders, R. (2021), Results of a CCPR Intercomparision of Spectral Radiance Measurements in the Air-Ultraviolet, Metrologia (Accessed April 20, 2024)
Created October 12, 2021