Comparison of laser-based and monochromator-based thermodynamic temperature measurements
George P. Eppeldauer, Howard W. Yoon, Jorge E. Neira, Vladimir Khromchenko, Charles E. Gibson, Allan W. Smith
In this work, we describe the comparisons between the laser-based and monochromator-based radiance responsivity calibrations of a radiation thermometer. The spectral selection of the radiation thermometer is performed using a photopic-response filter which is spectrally broad in order to minimize the effects of convolution differences due to the spectral width of the laser- and the monochromator-based sources. The thick photopic-response filter also reduces the possible interference fringes which can be problematic in the laser-based calibrations. We will compare the radiance responsivities obtained using the two approaches and also compare the blackbody temperatures determined using the detector/monochromator based and the gold-point based calibration methods.