A Comprehensive Model For The Intrinsic Transmission Properties Of Optical Windows

Michael E Thomas; Richard I Joseph

doi:10.1117/12.945855

18 July 1988 A Comprehensive Model For The Intrinsic Transmission Properties Of Optical Windows

Michael E Thomas, Richard I Joseph

Proceedings Volume 0929, Infrared Optical Materials IV; (1988) https://doi.org/10.1117/12.945855
Event: 1988 Technical Symposium on Optics, Electro-Optics, and Sensors, 1988, Orlando, FL, United States

Abstract

Current applications of optical window materials require a compre-hensive characterization of the index of refraction and absorption coefficient as a function of frequency and temperature. General models of multiphonon absorption and one-phonon resonances are used to characterize the complex index of refraction of polar crystals. Experimental data from 100 to 5000 cm ^-1 at a variety of temperatures are used to determine physically meaningful parameters in the models. Extrapola-tions outside the experimental range of temperature and frequencies are valid. Thus, the model is of great utility. A review of the theory used in this model is given. Results of the application of the model to oxides, fluorides, and alkali halides are also presented. The absorption coefficient from 105 to 10 -5 cm -1 and the index of refraction from radio frequency to visible are obtained.

Citation Download Citation

Michael E Thomas and Richard I Joseph "A Comprehensive Model For The Intrinsic Transmission Properties Of Optical Windows", Proc. SPIE 0929, Infrared Optical Materials IV, (18 July 1988); https://doi.org/10.1117/12.945855

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