A spectroradiometric pyrometer was developed to measure temperatures of shock-heated gases with time resolution of about 10 μsec. Gas temperatures in shock-heated CO2–N2 mixtures and in self-sustaining detonations were determined by simultaneously measuring infrared spectral radiance and absorptance at selected wavelengths in CO2 and H2O band spectra. By Kirchhoff’s law, the ratio (radiance/absorptance) equals the Planck blackbody radiance, from which the temperature is easily found. The measured temperatures agreed with values calculated from the measured shock velocities.
© 1966 Optical Society of America
Original Manuscript: October 5, 1965
Published: February 1, 1966
Gunter J. Penzias, Stanley A. Dolin, and Herman A. Kruegle, "Spectroradiometric Pyrometry of Shock-Heated Gases by Infrared Emission and Absorption Measurements," Appl. Opt. 5, 225-230 (1966)