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Normal Infrared Spectral Emittance of Al2O3

Published

Author(s)

Simon G. Kaplan, Leonard M. Hanssen

Abstract

We have measured the near-normal ordinary ray transmittance and reflectance of crystalline Al2O3 from 1.6 m to 11 m and temperatures from 296 K to 582 K. The absorptance, or emittance, is derived from 1-(T+R), where T and R are the measured transmittance and reflectance. The derived emittance curves are compared with the predictions of a multi-phonon model. Generally, good agreement is found between the measured and predicted results in the region of the multi-phonon absorption edge.
Citation
SPIE series

Keywords

emittance, infrared, sapphire

Citation

Kaplan, S. and Hanssen, L. (1998), Normal Infrared Spectral Emittance of Al<sub>2</sub>O<sub>3</sub>, SPIE series (Accessed April 16, 2024)
Created October 8, 1998, Updated June 27, 2017