Ultra-wide varifocal imaging with selectable region of interest capacity using Alvarez lenses actuated by a dielectric elastomer

作     者：QUN HAO CHUANXUN CHEN JIE CAO ZHIKUO LI YANG CHENG 

作者机构：Key Laboratory of Biomimetic Robots and SystemsMinistry of EducationBeijing Institute of TechnologyBeijing 100081China Yangtze Delta Region Academy of Beijing Institute of TechnologyJiaxing 314003China 

出 版 物：《Photonics Research》 (光子学研究（英文版）)

年 卷 期：2022年第10卷第7期

页      面：1543-1551页

核心收录：

学科分类：08[工学] 080203[工学-机械设计及理论] 0802[工学-机械工程] 0811[工学-控制科学与工程] 0702[理学-物理学] 

基　　金：National Natural Science Foundation of China(91420203 61605008 61905014 51735002) 

主　　题：dielectric system displacement 

摘      要：A remarkable feature of Alvarez lenses is that a wide focal length tuning range can be achieved using lateral displacement rather than commonly used axial translation,thus,reducing the overall length of varifocal imaging ***,we present novel lens elements based on Alvarez lenses actuated by a dielectric elastomer(DE).The proposed lens elements are composed of the varifocal component and the scanning *** on the proposed lens elements,an imaging system is built to realize ultra-wide varifocal imaging with a selectable region of *** lens elements have a variable focus function based on an Alvarez lens structure and a DE actuator and a scanning function based on the DE-based four-quadrant *** large deformation generated by the DE actuators permits the lateral displacement of the Alvarez lenses up to 1.145 *** focal length variation of the proposed varifocal component is up to 30.5 times,where the maximum focal length is 181 mm and the minimum focal length is 5.94 *** rise and fall times of the varifocal component are 160 ms and295 ms,*** applying different voltages on four-quadrant actuators,the scanning component allows the varifocal component to move in different directions and endows the varifocal component with a selectable region of interest imaging *** scanning range of the scanning component is 17.57°.The imaging resolution of the imaging system is approximately 181 lp/*** system developed in the current study has the potential to be used in consumer electronics,endoscopy,and microscopy in the future.