8 October 1998 Normal infrared spectral emittance of Al2O3
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We have measured the near-normal ordinary ray transmittance and reflectance of crystalline Al2O3 from 1.6 micrometer to 11 micrometer 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 prediction. Generally, good agreement is found between the measured and predicted results in the region of the multi-phonon absorption edge.
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Simon G. Kaplan, Leonard M. Hanssen, "Normal infrared spectral emittance of Al2O3", Proc. SPIE 3425, Optical Diagnostic Methods for Inorganic Transmissive Materials, (8 October 1998); doi: 10.1117/12.326658; https://doi.org/10.1117/12.326658

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