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Portable High Accuracy Double Spectrometer for Ultraviolet Spectral Irradiance Measurements



E A. Thompson, E A. Early


A portable high accuracy double spectrometer for ultraviolet (UV) spectral irradiance measurements has been under development at the National Institute of Standards and Technology (NIST) for several years. It has been used in the comparison of NIST spectral irradiance sources: an electron storage ring, 1000 W quartz-halogen lamps, deuterium arc lamps, and a windowless argon miniarc. A UV spectral irradiance intercomparison with the Physikalische Technische Bundesanstalt (PTB) of Germany has also been carried out with the instrument. This paper will discuss the modular design of this instrument, preliminary uncertainty analysis, results of standard source comparisons and the results of solar ultraviolet measurements using the UV spectrometer with the NIST spectral irradiance field calibrator.
Proceedings Title
Proceedings of the 1999 SPIE Meeting
Conference Dates
July 18-23, 1999
Conference Location
Conference Title
SPIE Meeting


spectral irradiance, spectroradiometer, ultraviolet, ultraviolet irradiance


Thompson, E. and Early, E. (1999), Portable High Accuracy Double Spectrometer for Ultraviolet Spectral Irradiance Measurements, Proceedings of the 1999 SPIE Meeting, Undefined (Accessed May 22, 2024)


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Created July 22, 1999, Updated October 12, 2021