Abstract

The infrared absorption spectrum of polytetrafluoroethylene at 298°K from 2 to 15 μ and the surface-emission spectrum at a minimum temperature of 700°K from 2.7 to 6.0 μ are reported. Corresponding absorption coefficients and emissivity are discussed. The emissivity varies with wavelength in accordance with the absorption, as expected, so that assignment of a color temperature or description of the hot surface as a graybody are not valid.

© 1961 Optical Society of America

Infrared Emission Spectra of Quartz*

Tunis Wentink and Walter G. Planet
J. Opt. Soc. Am. 51(6) 595-600 (1961)

Infrared Transmittance and Kerr Effect of Nitrobenzene

D. C. Cronemeyer and L. R. Spanberger
J. Opt. Soc. Am. 51(10) 1061-1066 (1961)

Measurements of Infrared Spectral Emissivities of Hot Carbon Dioxide in the 4.3-μ Region*

Richard H. Tourin
J. Opt. Soc. Am. 51(2) 175-183 (1961)

Some Spectral Emissivities of Water Vapor in the 2.7-μ Region*

Richard H. Tourin
J. Opt. Soc. Am. 51(11) 1225-1228 (1961)

Optical Constants and Reflectance and Transmittance of Evaporated Aluminum in the Visible and Ultraviolet*

G. Hass and J. E. Waylonis
J. Opt. Soc. Am. 51(7) 719-722 (1961)