29 July 2002 Tungsten lamp as radiation standard and the emissivity effects
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The derivative of the detected incidence in a wavelength interval with respect to temperature has previously been shown to include two terms. The first term depends on the change in the blackbody emission with temperature. The second term depends on the change of emissivity with temperature. The error of neglecting the second terms is analyzed and evaluated for a standard radiation source, a tungsten lamp, for which the measured emissivity data have been published. In this specific case the error changes form a negligible 6% to a significant value of more than 45%.
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Gonzalo Paez, Gonzalo Paez, } "Tungsten lamp as radiation standard and the emissivity effects", Proc. SPIE 4719, Infrared and Passive Millimeter-wave Imaging Systems: Design, Analysis, Modeling, and Testing, (29 July 2002); doi: 10.1117/12.477449; https://doi.org/10.1117/12.477449

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