Design and performance evaluation of a large-aperture variable-focus lens with a liquid-membrane-liquid structure

Yutao Huang; Lihui Wang; Shuangjiang Huang; Longfei Fan

doi:10.1117/12.3035956

27 November 2024 Design and performance evaluation of a large-aperture variable-focus lens with a liquid-membrane-liquid structure

Yutao Huang, Lihui Wang, Shuangjiang Huang, Longfei Fan

Author Affiliations +

Proceedings Volume 13237, Optical Design and Testing XIV; 132370N (2024) https://doi.org/10.1117/12.3035956
Event: SPIE/COS Photonics Asia, 2024, Nantong, Jiangsu, China

Abstract

Interest in variable-focus lenses is growing due to their dynamic optical power control and reduced spatial demands for focusing and/or zooming functions. Most variable-focus lenses are limited to small apertures (< 10mm), limiting their application scenarios. In this work, we designed and fabricated a 42mm large-aperture variable-focus lens based on a liquid-membrane-liquid (LML) structure. This design surpasses the typical limitations of small aperture sizes in variable-focus lenses. Experiments show that the prototype achieves consistent optical power actuation range in [−3D, +3D], high repeatability during the actuation process, and 82.1622% transmittance using a ~630nm laser beam. After constructing an imaging system incorporating the proposed prototype, the imaging tests yield average modulation transfer function (MTF) values of 0.7904 at 17.204lp/mm spacial frequency and 0.5439 at 34.409lp/mm in the region where no obvious distortion occurs. The prototype demonstrates potential applications in fields requiring large aperture and high-quality imaging capabilities, such as wearable devices and machine vision.

(2024) Published by SPIE. Downloading of the abstract is permitted for personal use only.

Citation Download Citation

Yutao Huang, Lihui Wang, Shuangjiang Huang, and Longfei Fan "Design and performance evaluation of a large-aperture variable-focus lens with a liquid-membrane-liquid structure", Proc. SPIE 13237, Optical Design and Testing XIV, 132370N (27 November 2024); https://doi.org/10.1117/12.3035956

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KEYWORDS

Prototyping

Liquids

Modulation transfer functions

Imaging systems

Deformation

Solids

Transmittance

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