摘要
传统的菲涅尔透镜在没有机械移动的情况下,不能进行主动轴向调焦。为了可以更好地将菲涅尔透镜应用于成像、显示、目标跟踪、光伏系统等领域,本文根据菲涅尔透镜的典型结构、基于电润湿效应提出了一种环形腔室的液体菲涅尔透镜。可以通过电压来控制环形腔室内液面的倾斜角度,从而控制光束的偏折方向,实现菲涅尔透镜轴向焦距调节的功能。实验结果表明,本文提出的液体菲涅耳透镜具备轴向调焦的功能,驱动电压约为20 V,饱和电压约为220 V,焦距变化范围为-52~-73 mm。
Traditional Fresnel lenses cannot be used for active axial focusing without mechanical movement.In order to better apply the Fresnel lens to imaging,display,target tracking,photovoltaic system,and other fields,we proposed a ring chamber liquid Fresnel lens based on the typical structure of Fresnel lens and electrowetting effect.The proposed lens can be controlled by voltage to change the angle of inclination of the liquid surface within the ring chamber.So the axial focal length can be adjusted by controlling the deflection direction of the beam.The experimental results show that the proposed liquid Fresnel lens has the function of axial focusing.Its driving voltage is about 20 V,saturation voltage is about 220 V,and focal length varies from-52 mm to-73 mm.
作者
王鑫
赵悠然
徐近博
袁荣英
王琼华
刘超
WANG Xin;ZHAO You-ran;XU Jin-bo;YUAN Rong-ying;WANG Qiong-hua;LIU Chao(School of Instrumentation and Optoelectronic Engineering,Beihang University,Beijing 100191,China)
出处
《液晶与显示》
CAS
CSCD
北大核心
2022年第8期942-947,共6页
Chinese Journal of Liquid Crystals and Displays
基金
国家自然科学基金(No.61927809,No.62175006)。
