To provide understanding the general features of the optical behaviour of thin films showed large differences from those the bulk materials, and to give information about investigating techniques.

Propagation of electromagnetic field in layered media, amplitude transmittance and reflectance of layered media, Fresnel coefficients, optical constants of layered media, absorption and dispersion, reflection and transmission by a single film. optical constants of thin films; experimental methods, results on optical constants; metal films, abnormal absorption phenomenon, Maxwell-Garnett theory, dielectric films, metal and semiconductor films, Size effect in optical properties, multilayer optical system.