采用液晶透镜校正电润湿液体透镜调焦系统的单色像差  

Correcting the monochromatic aberration of the electrowetting liquid lens focusing system using liquid crystal lens

作　　者：张嘉伦 于涛 黄志宇 潘国彬 ZHANG Jia-lun;YU Tao;HUANG Zhi-yu;PAN Guo-bin(School of Science, Dalian Maritime University, Dalian 116026, China)

机构地区：[1]大连海事大学理学院,辽宁大连116026

出　　处：《液晶与显示》2021年第7期954-963,共10页Chinese Journal of Liquid Crystals and Displays

基　　金：国家自然科学基金(No.11404048);中央高校基本科研业务(No.3132016349)

摘　　要：为解决电润湿液体透镜调焦系统的单色像差随调焦过程中发生较大改变的问题,提出利用梯度折射率分布可调的液晶透镜对系统单色像差进行校正的设计方案。在850 nm波长下,采用液晶透镜对系统在无限远到200 mm间6种典型物距下的单色像进行校正。在系统像差最大的无限远物距下,边缘视场的点列图几何半径从44.696μm减小到7.423μm,其余视场下的弥散斑均减小到艾里斑以内,系统单色像差得到了较好的校正。为减少液晶透镜响应时间,将液晶透镜改为5个1/5盒厚的液晶透镜的叠层组合,大幅提高了响应速度。研究发现,此结构同样对系统在不同物距下的单色像差具有良好的校正作用。In order to solve the problem that the monochromatic aberration of the electrowetting liquid lens focusing system changes greatly with the focusing process,a design scheme of correcting the monochromatic aberration of the system by using liquid crystal lens with adjustable gradient refractive index distribution is proposed.At 850 nm wavelength,liquid crystal lens is used to correct the monochromatic images of the system at six typical object distances ranging from infinity to 200 mm.At the infinite object distance with the largest aberration,the geometric radius of the dot pattern of the edge field of view is reduced from 44.696μm to 7.423μm,and the speckle in other fields is reduced to the Airy spot.And the monochromatic aberration of the system has been corrected.In order to reduce the response time of the liquid crystal lens,the liquid crystal lens is replaced by laminated combination of five liquid crystal lenses with 1/5 cell thick,which enhances the response speed significantly.It has been found that this structure also has a favorable correction effect on the monochromatic aberration of the system at different object distances.

关 键 词：电润湿液体透镜 液晶透镜 梯度折射率 单色像差校正 调焦系统 

分 类 号：O439[机械工程—光学工程] O753.2[理学—光学]