Simple technique for measuring the phase property of a twisted nematic liquid crystal television

Abstract

A simple technique to measure the phase retardation property as a function of the driving voltage of a liquid crystal television (LCTV) accurately using Young?s double?slit interference principle is presented. The phase property of an Epson LCTV is characterized by measuring the irradiance change at a fixed position at the center of the Young?s interference pattern. The phase retardation is also characterized by measuring the fringe shift as previous authors have done, and the measured results obtained with the two methods are consistent.