Medidas Interferométricas do Índice de Refração de Líquidos

Abstract

This dissertation is the result of the project for the development and automation of highprecision refractometers, which is to obtain the refractive index of liquids with an accuracy of one part in 106. Some interferometric measurement techniques, methods of measurement and movement control were studied during the development of this project. Deionized water was used as object of study. There are more bibliographic source with measurements in distilled water than deionized water but both are considered pure, and properties are quite similar, although they have different specific applications. The thermo-optical analysis of pure water with high accuracy allows the observation of anomalous behavior in the refractive index curve at temperatures above 36 C above, and such behavior can be observed with few measurements using equipment described here.