Take a sneak peek at the new NIST.gov and let us know what you think!
(Please note: some content may not be complete on the beta site.).
NIST Authors in Bold
|Author(s):||Howard W. Yoon; David W. Allen; Charles E. Gibson; Robert D. Saunders; Bettye C. Johnson; Steven W. Brown; Keith R. Lykke;|
|Title:||Temperature Scales Using Radiation Thermometers Calibratied From Absolute Irradiance and Radiance Responsivity|
|Abstract:||In the International Temperature Scale of 1990 (ITS-90), temperatures above the freezing temperature of silver are defined with radiation thermometers calibrated using spectral radiance ratios to one of the silver-, gold- or copper-freezing temperature blackbodies and Planck's radiance law. However, due to the use of spectral radiance ratios, the temperature uncertainties of the ITS-90 defined using these thermometers increase as the square of the temperature ratios. Using absolute radiometry, thermodynamic temperatures can be determined with radiation thermometers traceable to a cryogenic radiometer, and the resulting temperature uncertainties can be lower than those measured using the ITS-90 techniques. We describe the development of a new international temperature scale based upon absolute radiometry.|
|Conference:||National Conference of Standards Laboratories International|
|Proceedings:||NCSL International 2003 Workshop and Symposium Conference Proceedings | | ||
|Dates:||August 17-21, 2003|
|Keywords:||blackbodies,cryogenic radiometer,detector-based radiometry,International Temperature Scale of 1990,radiation thermometer|