Abstract
Using radiometry, thermodynamic temperatures can be determined by a variety of experimental techniques. Radiometers without imaging optics can be calibrated for spectral power or spectral irradiance responsivity, and radiometers with imaging optics can be calibrated for radiance responsivity. These separate approaches can have different uncertainty components with different uncertainty values. At NIST, thermodynamic radiation thermometry is performed using radiation thermometers calibrated for radiance responsivity using laser-irradiated integrating sphere sources (ISS). The radiance of the ISS is determined using Si-trap detectors whose spectral power responsivity is traceable to the electrical substitution cryogenic radiometer. The radiometric basis of the NIST approach is discussed. The uncertainty budget for the measurements as well as the characterizations to determine the component uncertainty values is listed.
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Yoon, H.W., Gibson, C.E., Eppeldauer, G.P. et al. Thermodynamic Radiation Thermometry Using Radiometers Calibrated for Radiance Responsivity. Int J Thermophys 32, 2217–2229 (2011). https://doi.org/10.1007/s10765-011-1056-1
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DOI: https://doi.org/10.1007/s10765-011-1056-1