Research Papers

A New Technique for Measuring The Spectral Emissivity of Solids at High Temperatures

[+] Author and Article Information
Peter E. Glaser

Arthur D. Little, Inc.

Henry H. Blau, Jr.

Arthur D. Little, Inc., Cambridge, Mass.

J. Heat Transfer 81(1), 92-94 (Feb 01, 1959) (3 pages) doi:10.1115/1.4008144 History: Received March 18, 1958; Published February 01, 1959; Online February 19, 2019


The principles underlying emissivity measurements in solid materials at temperatures in the range of 3500 K, and conditions for carrying out these measurements are briefly reviewed. The advantages of using an imaging furnace for this application are pointed out and the necessary optical system described. The function of the shutter for separating emitted and incident radiation, control of the temperature by the aperture-limiting cylinder, and the calibration of a spectrometer by a black-body reference standard are explained.

Copyright © 1959 by ASME
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