Infrared spectral emittance measurements of optical materials.
Optical properties of solids are usually determined by measurements of either the transmittance or the reflectance. Each of these methods has advantages and disadvantages, depending upon the spectral region and the nature of the material being studied. A third method, the measurement of emittance, although little used has definite advantages under certain conditions.
Stierwalt
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Infrared Division, Research Department,U.S. Naval Ordnance Laboratory, Corona, California 91720, USA.