Exploration of Alternative Methods for Fitting Radiation Thermometer Signal to Blackbody Temperature

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Exploration of Alternative Methods for Fitting Radiation Thermometer Signal to Blackbody Temperature (167.19 KB)

In the science of radiation temperature measurement, the measurement of temperature from calibration blackbodies has used the Sakuma-Hattori Equation in the Planckian Form to relate temperature and emitted radiance. This is very useful as it makes calculations and a curve fit relationships between temperature and radiance much simpler than using Planck’s Law. While this approach is standard, it may not always account for the non-linear and real effects acting upon the measurement outcome which detract from the results’ accuracy. This may be especially true if the relationship between radiance and the radiation thermometer’s signal output is not linear.

This paper discusses an occasion where such a problem has manifested itself. Several parameterized equations based on the Sakuma-Hattori Equation are introduced as an attempt to improve the curve fit. Measurement results are used to determine the quality of each equation with respect to the curve fit.