Fabrication of Liquid Crystal Grating

In order to fabricate the color liquid crystal grating, firstly, a planar indium tin oxide electrode is deposited on the inner surface of the bottom substrate, and the planar indium tin oxide electrode of the bottom substrate is etched into three different periodic strip indium tin oxide electrodes. Secondly, the polyimide layer is coated on the inner surface of the bottom substrate and rubbed in the direction which is perpendicular to the periodic strip indium tin oxide electrodes. Thirdly, a top glass substrate without indium tin oxide electrode is coated with polyimide layer and rubbed in the same direction as the rubbing direction of the bottom substrate. Fourthly, the top glass substrate and the bottom substrate are encapsulated into a cell. Finally, the liquid crystal material is poured into the cell, and then the liquid crystal director distribution is homogeneously aligned perpendicular to the periodic strip indium tin oxide electrodes direction.