Work

42 mm large aperture variable-focus lens based on the liquid-membrane-liquid structure

Year: 2024

Type: article

Abstract: Variable-focus lenses enable dynamic focus control and reduce the volume of the optical systems. However, few of them have been scaled up to large apertures of 10 mm , which limits their application scenarios. Here, a variable-focus lens prototype with a 42 mm large aperture based on the liquid-membrane-liquid structure was proposed and evaluated. The prototype shows a range of adjustable optical power at [−3 D , +3 D ], and demonstrates high repeatability during the operation process. The average normalized modulation transfer function value for an imaging system shows 0.7904 in 17.204 lp / mm and 0.5439 in 34.409 lp / mm . The resolution values in horizontal and vertical directions are 8 lp / mm and 8.98 lp / mm , respectively. Besides, the millisecond-level response time of the prototype is achieved with a rising edge of 5.02 ms and a falling edge of 3.66 ms . The prototype demonstrates the application scenarios of variable-focus lenses for large aperture requirements with the potential for satisfactory performance, such as in wearable devices, machine vision systems, and so on.

Source: Optics Express

DOI: 10.1364/oe.539941

Authors: Yutao Huang, Lihui Wang, Shuangjiang Huang, Longfei Fan, Tao Chen

Institutions: Wuyi University, Wuyi University, Guangdong Academy of Sciences, Shenyang University of Technology

Language: English

Topic: Electrowetting and Microfluidic Technologies

Subfield: Electrical and Electronic Engineering

Field: Engineering

Domain: Physical Sciences

Open Access status: gold

Estimated APC paid: $2,270

Funders: National Natural Science Foundation of China, Natural Science Foundation of Guangdong Province, Guangdong Academy of Sciences