A Comprehensive Model For The Intrinsic Transmission Properties Of Optical Windows

摘要: A comprehensive model for the intrinsic transmissionproperties of optical windowsMichael E. Thomas and Richard I. JosephThe Johns Hopkins University Applied Physics Laboratory, Laurel, Maryland 20707 -6090ABSTRACTCurrent applications window materials require a compre-hensive characterization index refraction absorption coeffi-cient as function frequency temperature. General models ofmultiphonon one -phonon resonances are used to char-acterize complex polar crystals. Experimentaldata from 100 5000 cm -1 at variety temperatures todetermine physically meaningful parameters in models. Extrapola-tions outside experimental range temperature frequencies arevalid. Thus, is great utility. review theory usedin this given. Results application oxides,fluorides, alkali halides also presented. The 105 10 -5 - ' radiofrequency visible obtained.1. INTRODUCTIONModern infrared technology comprehensivecharacterization