Abstract

We have developed a new method for characterizing the irradiance responsivity of filter radiometers. The method is based on a spatially uniform, known irradiance, generated by combining several identical laser beams. The measurement setup and the experimental demonstration at one wavelength are presented. The diffraction correction related to the generated irradiance is studied experimentally. The uncertainty analysis of the method indicates a relative standard uncertainty of 1 × 10^-3. The results with the new method are compared with the characterization measurements based on our present spectral-irradiance scale. The results have a relative deviation of 1 × 10^-3, which is well within the combined standard uncertainty of the comparison.

© 1999 Optical Society of America

Development of a detector-based absolute spectral irradiance scale in the 380–900-nm spectral range

Petri Kärhä, Pasi Toivanen, Farshid Manoochehri, and Erkki Ikonen
Appl. Opt. 36(34) 8909-8918 (1997)

Intercomparison between two independent primary radiometric standards in the visible and near infrared: a cryogenic radiometer and the electron storage ring BESSY

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Appl. Opt. 25(14) 2409-2420 (1986)

Facility for spectral irradiance and radiance responsivity calibrations using uniform sources

Steven W. Brown, George P. Eppeldauer, and Keith R. Lykke
Appl. Opt. 45(32) 8218-8237 (2006)

Comparison of absolute spectral irradiance responsivity measurement techniques using wavelength-tunable lasers

Ville Ahtee, Steven W. Brown, Thomas C. Larason, Keith R. Lykke, Erkki Ikonen, and Mart Noorma
Appl. Opt. 46(20) 4228-4236 (2007)

Long-term temporal stability of the National Institute of Standards and Technology spectral irradiance scale determined with absolute filter radiometers

Howard W. Yoon and Charles E. Gibson
Appl. Opt. 41(28) 5872-5878 (2002)