Methods of measuring refractive indices

Abstract

Several methods for the RI measurement are available. RIs of bulk crystals and glasses can be measured very precisely using prisms cut-out of these materials [1–7] by the interference methods using a Michelson-type interferometer [8–10] or by the ellipsometer methods [11, 12]. RIs of solid powders are usually measured by the immersion method [13–15], whereas the optical diffraction method [16–18] is suitable for powders suspended in the liquid media. The authors’ own works in this field are listed below.