Digital Image Processing Study on Dynamics of Dissipative Structure in Nematic Liquid Crystal

Abstract

A dynamics of convective flow pattern observed in the electrohydrodynamic instability of nematic liquid crystal is investigated. Fluctuation of the pattern under ac-field is analysed by new dynamic image processing technique. The technique is based on a time-correlation analysis of a brightness change of each picture element. Spatial difference or local nature of the pattern dynamics is visualized by the image processing technique. Voltage dependence of the correlation function of the pattern fluctuation is discussed from the point of view of the successive transitions in far from equilibrium system.