大口径光焦度可电调菲涅耳液晶透镜  

Tunable Fresnel Liquid Crystal Lens with Large Aperture

作　　者：黄振豪 刘志强 林弘峻 叶茂 Huang Zhenhao;Liu Zhiqiang;Lin Hongjun;Ye Mao(School of Optoelectronic Science and Engineering,University of Electronic Science and Technology of China,Chengdu 611731,Sichuan,China;Huawei Technologies Co.,Ltd.,Shenzhen 518129,Guangdong,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 [2]华为技术有限公司,广东深圳518129

出　　处：《激光与光电子学进展》2023年第19期182-187,共6页Laser & Optoelectronics Progress

基　　金：四川省科技计划(2021YJ0102)。

摘　　要：液晶透镜是一种无需机械移动,可电控调焦的光学透镜。报道了一种大口径液晶透镜,将液晶透镜分成多个菲涅耳旁瓣,在保证光焦度和响应速度的情况下,可以极大地提高了液晶透镜的口径。利用叉指电极方式连接并控制各个旁瓣,每个旁瓣的驱动电压相同,简化了驱动方式。本工作设计的菲涅耳液晶透镜直径达到了1 cm,光焦度由所加电压进行控制,变化范围为-1.62D~+1.57D,入射平面波经过该菲涅耳液晶透镜调制,波前接近抛物线分布,呈现出良好的光学特性,本工作将此透镜作为对焦元件在成像系统中进行演示。A liquid crystal lens is a type of optical lens that can be electronically focused without mechanical movement.This paper proposes a large-aperture liquid crystal lens that is divided into multiple Fresnel zones.To guarantee the optical power and response speed,the aperture of the liquid crystal lens is significantly improved to 1 cm.The Fresnel zones are connected and controlled by means of interdigital electrodes,and the driving voltage of each Fresnel zone is the same,which simplifies the driving method.The optical power of the newly proposed Fresnel liquid crystal lens can be controlled between-1.62D and +1.57D via the applied voltage.After the incident plane wave is modulated by the Fresnel liquid crystal lens,the wavefront is close to a parabolic distribution.This lens shows favorable optical characteristics.In this work,the lens is used as a focusing element in an imaging system for demonstration purposes.

关 键 词：自适应成像 菲涅耳液晶透镜 电控调焦 大口径 

分 类 号：TB811.3[一般工业技术—摄影技术]