Patent ID: 6299346
Filing Date: 2001-10-09
Classification: G01J,G01K

Abstract:
A method for determining a temperature of a body that emits radiation at a plurality of wavelengths, the body having an emissivity that varies with wavelength, the body being located in an environment, the body having an absorption edge that depends on the environment, the method comprising the steps of:(a) determining the emissivity of the body in an irradiation wavelength band;(b) inferring the emissivity of the body in a first emission wavelength band, different from said irradiation wavelength band, from said emissivity in said irradiation wavelength band;(c) receiving radiation emitted by the body in said first emission wavelength band;(d) measuring a first signal representative of an intensity of the emitted radiation received from the body in said first emission wavelength band; and(e) inferring the temperature of the body from said first signal and from the emissivity determined in said first emission wavelength band.