柔性液晶微透镜阵列的制备与性能研究

针对集成成像视场角狭小的问题,设计并制备了一种柔性圆孔驱动电极控制液晶分子偏转的可弯曲和焦距可调的柔性液晶微透镜阵列.利用光刻技术在柔性ITO基板表面刻蚀并形成规则的圆孔阵列电极,旋涂工艺制备柔性聚酰亚胺(PI)膜层,PI膜层经60℃加热5 min后,再利用等离子体在功率630 W条件下处理5 min固化成PI取向层....

Preparation and Properties of Flexible Liquid Crystal Micro-lens Arrays

A Flexible Liquid Crystal Micro-Lens Arrays(LC MLAs)with an adjustable focal length was designed and prepared to solve the narrow viewing angle of the integrated imaging.In this paper,the holepatterned driven-electrode arrays were fabricated by a photolithography technology and the flexible Polyimide(PI)film was prepared by a spin coating method on the flexible ITO glass substrate.After the PI film layer was heated at 60°C for 5 min,the PI orientation layer was formed by using the plasma at a power of 630 W for 5 minutes.The optical properties of LC MLAs with a flat substrate and a curvature radius of 7.5cm were studied after the LC MLAs were fabricated.The experimental results show that the prepared LC MLAs can achieve the excellent focusing properties under the condition of a flat plate and a curvature radius of 7.5 cm.The interference patterns are uniform and the focal radius are small when the operating voltages are applied to the LC MLAs.Further,the focal length of the flexible LC MLAs with the curvature radius of 7.5 cm can be tunable from 0.43 mm to 1.05 mm when the operating voltages are changed from 3 Vrms to 5.3 Vrms.