Remarques sur les propriétés des lames minces inhomogènes

Abstract
I. Comparison between the results obtained by David's method and the result one gets en considering a thin homogeneous and isotropic layer, the thickness d of which is small compared with the wavelength λ of the incident light. II. Study of the optical properties of thin (d « λ), inhomogeneous but isotropic films. It is supposed that their complex dielectric constant is a function of one coordinate only, the direction of which is normal to the film. Examination of the oblique incidence, the electric vector being perpendicular to the plane of incidence. Some simple relations between the reflexion and transmission coefficients and phase changes, are given. Discussion of the possibility of determining the characteristic parameters of a thin film.