Abstract

This article describes a method of finding the optical constants of films—the refractive indices and absorption coefficients. The method is based on correcting the optical spectra for absorption. The spectra obtained after correction are free from absorption and can be analyzed by well-known methods for nonabsorbing films. To illustrate, the proposed method is used to analyze the spectra of BaF2 optical films, and the optical constants are found for these films in the spectral range 1.7–12.5 μm.

© 2018 Optical Society of America

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