Attenuated Total Reflection Method for Obtaining Optical Constants of Powders

摘要

An apparatus designed to measure the optical constants of a powder suspended in a liquid is described. A laser source (3.391 micrometers) and attenuated total reflection approach are used. The accuracy of the apparatus is evaluated by comparing measured results for a liquid hydrocarbon to published results from specular reflection measurements. The applicability of the Maxwell-Garnett effective medium theory is considered.