A light beam irradiating optical system is associated with a dielectric material member having a surface, on which a thin film layer has been formed, a sample being brought into contact with a surface of the thin film layer. The light beam irradiating optical system produces and irradiates a light beam...http://www.google.de/patents/US7812955?utm_source=gb-gplus-sharePatent US7812955 - Sample analysis apparatus and analysis method