INVESTIGATION AND ELABORATION OF METHODS
OF MULTICOLOR OPTICAL THERMOMETRY

L. F. Zhukov and A. V. Bogdan

UDC 621.745.5.06./.07:536.5

The various complex mathematical transformations previously 
proposed for eliminating methodological errors of multicolor radiation 
pyrometry are mainly reduced to the determination of such combinations 
of wavelengths or corrections of registered brightness for the spectral 
distribution of the radiating capacity of the object being thermometered 
at which its equivalent radiating capacity is equal to unity. Mathematical 
formulas of the determining parameters of multicolor pyrometry of 
radiation have been obtained. Engineering techniques for calculating 
the critical values of the determining and adjustable parameters at 
which the application of multicolor optical thermometry is excluded 
because of large errors have been developed. Algorithms of a priori 
and a posteriori calibration systems of multicolor pyrometry of radiation 
of objects with practically any spectral distribution of the radiating 
capacity are proposed.

Physico-Technological Institute of Metals and Alloys, 
National Academy of Sciences of Ukraine, Kiev; email: zhukov@i.com.ua. 
Translated from Inzhenerno-Fizicheskii Zhurnal, Vol. 75, No. 5, pp. 
165-169, September-October, 2002. Original article submitted 
February 18, 2002.

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