Abstract

We start with the well-known exact Fresnel equations for the reflectance and transmittance of a thin absorbing film on a glass substrate at normal incidence. The optical constants of the film, refractive index and absorption index, and the film thickness itself are all determined. An iterative method is used with a complete sensitivity study of the parameters. Accurate results are obtained. An error analysis is carried out to study the accuracy of the inversion method suggested using simulated results.

© 1985 Optical Society of America