同心圆环电极结构的液晶透镜特性  

Characteristics of liquid crystal lens with concentric ring electrode structure

作　　者：刘豪 冯文斌 刘志强 叶茂 LIU Hao;FENG Wen-bin;LIU Zhi-qiang;YE Mao(School of Optoelectronic Science and Engineering,University of Electronic Science and Technology of China,Chengdu 611731,China)

机构地区：[1]电子科技大学光电科学与工程学院,四川成都611731

出　　处：《液晶与显示》2023年第9期1171-1177,共7页Chinese Journal of Liquid Crystals and Displays

摘　　要：液晶透镜的液晶层内相位分布通常不是理想的抛物线结构,这给液晶透镜的成像应用带来限制。本文采用基于液晶的线性响应区域设计的电极结构制作液晶透镜,通过对液晶透镜工作时的前信息进行分析,测出液晶透镜的光焦度和光学像差。在由相机模块和执行调焦功能的液晶透镜组成的成像系统中,通过对经过液晶透镜后所成的图像进行定量研究。分析成像系统形成的ISO12233图标的图像,获得成像系统的分辨能力。结果表明,该液晶透镜驱动简单,光焦度与驱动电压差符合线性关系,可在-4.9~+5.2 D范围调节,同时具有低于0.05λ的光学像差。在成像系统的应用中,在对主镜头分辨能力影响不大的情况下,该液晶透镜表现出优异的调焦性能。The phase distribution within the liquid crystal layer of a liquid crystal lens is usually not an ideal parabolic structure,which limits the imaging application of liquid crystal lenses.Using an electrode structure designed based on the linear response region of liquid crystal,a liquid crystal lens is produced.By analyzing the front information of liquid crystal lens waves during operation,the optical power and optical aberration of the liquid crystal lens can be measured.In an imaging system composed of a camera module and a liquid crystal lens that performs a focusing function,quantitative research is conducted on the image formed after passing through the liquid crystal lens.The image of the ISO12233 icon formed by the imaging system is analyzed to obtain the resolution of the imaging system.The results show that the driving of the liquid crystal lens is simple,and the relationship between the optical power and the driving voltage difference is linear,which can be adjusted in the range of-4.9 to+5.2 D,and has a lower than 0.05λoptical aberration.In the application of imaging systems,the liquid crystal lens exhibit excellent focusing performance with little impact on the resolution of the main lens.

关 键 词：液晶器件 液晶透镜 透镜 调制传递函数 

分 类 号：O753.2[理学—晶体学]