FIELD: measuring equipment.
SUBSTANCE: invention relates to measurement equipment in the field of heat physics of high temperatures and high-temperature metrology. Disclosed method comprises collecting and focusing radiation from a thermally stabilized body, converting its polychromatic radiation into monochromatic radiation, measuring signals of the photodetector in a given narrow wavelength range, determination of angular coefficients of linear dependences of measured signals and energy brightness calculated by Planck formula, on wavelength, calculation of spectral radiation coefficient with respect to ratio of obtained angular coefficients with account of correction coefficient.
EFFECT: expansion of dynamic range of measurements with simultaneous increase of accuracy and expansion of nomenclature of investigated objects, including models of absolutely black body and ampoules of high-temperature reference points.
1 cl, 3 dwg, 1 tbl
