NIST logo

Publication Citation: Normal Infrared Spectral Emittance of Al2O3

NIST Authors in Bold

Author(s): Simon G. Kaplan; Leonard M. Hanssen;
Title: Normal Infrared Spectral Emittance of Al2O3
Published: Date Unknown
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
Research Areas: