Patent ID: 6963816

Claim:
A method of obtaining an emissivity and temperature of a surface of interest, comprising: substituting the surface of interest with a highly reflective surface having a known reflectivity (r ci ); measuring a reflected signal S ci from the highly reflective surface in each wavelength interval i of a plurality of wavelength intervals; replacing the highly reflective surface with the surface of interest; measuring a reflected signal S i from surface of interest in each wavelength interval i; obtaining a reflectivity r i for each wavelength interval i using the following relationship: r i = S i S ci r ci determining an emissivity (ε i ) for each wavelength interval i according to the following relationship: ε i =1 −r i plotting, for each wavelength interval i, a ratio of measured power to calculated power normalized to an nth wavelength interval; and obtaining the temperature of the surface of interest based on the plots for each wavelength interval i.