naa a22 4500 510758908 CHVBK 20180411083132.0 cr unu---uuuuu 180411e20131001xx s 000 0 eng 10.1134/S0869864313050102 doi (NATIONALLICENCE)springer-10.1134/S0869864313050102 Rusin S. Joint Institute for High Temperatures RAS, Moscow, Russia aut Temperature recovery of opaque bodies by thermal radiation spectrum: the use of relative emissivity to select the optimal spectral range [Elektronische Daten] [S. Rusin] The approach based on relative emissivity was tested and developed using the experimental data. It was assumed that the medium separating an opaque body and measuring device was diathermic or nonradiating (it is characterized by its transmittance); radiation source emissivity and medium transmittance were unknown. Data on comparison of spectral radiances (spectral intensities), obtained within 220-2500 nm for the temperature lamps in the metrological laboratories of Europe, Russia, and USA were used as the initial experimental data. It is shown that the use of relative emissivity allows graphical interpretation for the solution to the initial nonlinear system of equations. In this case, the problem of determining the true temperature of the body by the thermal radiation spectrum in a graphical interpretation is reduced to the choice depending on relative emissivity at the desired temperature. It is shown that to narrow the interval, which includes the true temperature, the criterion was based on a change in convexity of spectral dependence of the relative emissivity in the process of desired temperature selection. The use of relative emissivity in a spectral range, where the Rayleigh—Jeans approximation is satisfied, allows unambiguous determination for the shape of emissivity dependence on the wavelength. The relationship for determination of the peak wavelength within the registered thermal radiation spectrum on the basis of data about the true temperature of the body and its spectral emissivity is presented. Pleiades Publishing, Ltd., 2013 true temperature nationallicence opaque body nationallicence thermal radiation spectrum nationallicence relative emissivity nationallicence Thermophysics and Aeromechanics Kutateladze Institute of Thermophysics SB RAS 20/5(2013-10-01), 631-646 0869-8643 20:5<631 2013 20 11510 https://doi.org/10.1134/S0869864313050102 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1134/S0869864313050102 text/html Onlinezugriff via DOI NATIONALLICENCE 100 1- Rusin S. Joint Institute for High Temperatures RAS, Moscow, Russia aut NATIONALLICENCE 773 0- Thermophysics and Aeromechanics Kutateladze Institute of Thermophysics SB RAS 20/5(2013-10-01), 631-646 0869-8643 20:5<631 2013 20 11510 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer