LIQUID CRYSTAL LAYER HAVING SPATIALLY-VARYING TILT ANGLE

摘要

PROBLEM TO BE SOLVED: To provide a liquid crystal layer having a spatially-varying tilt angle.

SOLUTION: The method of fabricating the optical element including the liquid crystal layer having the spatially-varying tilt angle includes: coating a substrate with a linearly photopolymerizable polymer layer; irradiating the linearly photopolymerizable polymer layer with linearly polarized ultra-violet light at an oblique angle; and applying a layer of liquid crystal material on a surface of the irradiated linearly photopolymerizable polymer layer. The liquid crystal material has a predetermined relationship between its tilt angle and a total dose of the linearly polarized ultra-violet light. The linearly photopolymerizable polymer layer is irradiated with at least one dose of linearly polarized ultra-violet light that is sufficient to induce formation of a plurality of discrete regions within the liquid crystal layer having a larger in-plane birefringence than an adjacent or surrounding region.

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