Laser radiometer

Details Laser radiometer Laser radiometer

G - Physics

01

J

73/52

G01J 5/02 (2006.01) B62B 13/10 (2006.01) G01J 5/00 (2006.01) G01J 9/04 (2006.01)

Patent

CA 1174075

ABSTRACT OF THE DISCLOSURE The present invention teaches a unique laser radiometer capable of accurately measuring the radiation temperature of a radiant surface and independently measur- ing the surface's emissivity. A narrow-band radiometer is combined with a laser reflectometer to measure concur- rently radiance and emissivity of a remote, hot surface. Together, radiance and emissivity yield the true surface temperature of the remote target. A narrow receiver bandwidth is attained by one of two methods; (a) hetero dyne detection or (b) optical filtering. A direct measure- ment of emissivity is used to adjust the value obtained for the thermal radiation signal to substantially enhance the accuracy of the temperature measurement for a given subject surface. The technique provides substantially high detection sensitivity over a very narrow spectral bandwidth.

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