Application of Total Internal Reflection using Prism with Elastic Layer

Abstract

New observation method for contact state of solid surface is proposed, which is based on the total internal reflection of prism. The contact area is enlarged by elastic layer between the prism and the test surface. Silicone rubber or PET film is used as the sheet. Depth distribution of the surface is estimated from the observed contact pattern. The depth rang from several micrometer to above a hundred micrometer is adjusted by the sheet thickness or applied load.