Eliminating the polarization response in a system for evaluating LCD parameters

Abstract

In most devices for evaluating LCD parameters, the response of the measurement system to polarization impedes correct evaluation of some parameters when a polarizer is applied. Analyzing the LCT5016 measurement system, we found that results were seriously affected by the polarization-dependent sensitivity of the spectrometer and by a partially polarized light source. A series of effective methods to eliminate the influence of the light source is proposed in this paper, involving both the measurement process technique and the design of the optical system. The result has general implications for overcoming similar polarization responses when developing systems.