A method for determination of the true temperature T and true radiative emissivity of a body at temperature T, using measurements of total energy radiated by the body in two or more adjacent wave length ranges .lambda..sub.1 .ltoreq..lambda..ltoreq..lambda..sub.2 and .lambda..sub.3 .ltoreq..lambda..ltoreq..lambda..sub.4...http://www.google.fr/patents/US5021980?utm_source=gb-gplus-shareBrevet US5021980 - Remote measurement of temperature
