An interference refractometer to measure the pressure and temperature dependence of the refractive index of liquids

Abstract

The design of an interference refractometer, using laser radiation, to determine the pressure and temperature variation of refractive index is reported. The method does not attempt to determine the absolute refractive indices. The performance of the refractometer was tested using water and methanol. The results for a series of solutions of KBr in water are also reported and the results are compared with previous empirical estimates.