Inferring Temperature From Optical Radiation Measurements

D P DeWitt

doi:10.1117/12.939167

27 March 1984 Inferring Temperature From Optical Radiation Measurements

D P DeWitt

Proceedings Volume 0446, Thermosense VI: Thermal Infrared Sensing for Diagnostics and Control; (1984) https://doi.org/10.1117/12.939167
Event: Thermal Infrared Sensing for Diagnostics and Control: Thermosense VI, 1983, Oak Brook, United States

Abstract

The methodology for inferring temperature from optical radiation exitent from an opaque surface is described. Beginning with the measurement equation, the output of the radiation thermometer is related to radiant flux reaching the detector. Characteristics of blackbody radiators are reviewed and the effects of surface emissivity, reflected irradiances and the atmosphere are presented. Applications to a reheat furnace and a direct-fired process heater illustrate the practical importance of these effects and point out the need for a firm understanding of the physics of thermal radiation to properly interpret radiation thermometer observations.

Citation Download Citation

D P DeWitt "Inferring Temperature From Optical Radiation Measurements", Proc. SPIE 0446, Thermosense VI: Thermal Infrared Sensing for Diagnostics and Control, (27 March 1984); https://doi.org/10.1117/12.939167

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