An accurate illumination model for objects coated with multilayer films
This paper proposes an accurate illumination model for rendering objects coated with multilayer films. Optical phenomena of multilayer films are caused by reflection, refraction, interference, and absorption of light inside each layer of the multiple films, and such physical phenomena are related to each other in a complicated manner. The proposed method calculates composite reflectance and transmittance of multilayer films, taking into account all the physical phenomena described above, and visualizes accurately the optical phenomena caused by the multilayer films. The illumination model proposed in the paper can handle both smooth surfaces and locally smooth rough surfaces. Several examples of objects coated with various kinds of films demonstrate the usefulness of the proposed method.
rough surface multilayer thin film multiple reflection and refraction interference and absorption wave optics