Aberration-free aspherical in-plane tunable liquid lenses by regulating local curvatures.

Chen, Qingming; Tong, Xiliang; Zhu, Yujiao; Tsoi, Chi Chung; Jia, Yanwei; Li, Zhaohui; Zhang, Xuming

Chen, Qingming; Tong, Xiliang; Zhu, Yujiao; Tsoi, Chi Chung; Jia, Yanwei; Li, Zhaohui; Zhang, Xuming.

Afiliación

Chen Q; Department of Applied Physics, The Hong Kong Polytechnic University, Hong Kong, China. apzhang@polyu.edu.hk.
Tong X; Beijing Institute of Space Mechanics & Electricity, Beijing 100094, China.
Zhu Y; Department of Applied Physics, The Hong Kong Polytechnic University, Hong Kong, China. apzhang@polyu.edu.hk.
Tsoi CC; Beijing Institute of Space Mechanics & Electricity, Beijing 100094, China.
Jia Y; State Key Laboratory of Analog and Mixed Signal VLSI, Institute of Microelectronics, University of Macau, Macau, China and Faculty of Science and Technology, University of Macau, Macau, China and Faculty of Health Sciences, University of Macau, Macau, China.
Li Z; School of Electronics and Information Engineering, State Key Laboratory of Optoelectronic Materials and Technologies, Sun Yat-sen University, Guangzhou 510275, China and Southern Marine Science and Engineering Guangdong Laboratory (Zhuhai), Zhuhai, China.
Zhang X; Department of Applied Physics, The Hong Kong Polytechnic University, Hong Kong, China. apzhang@polyu.edu.hk and State Key Laboratory of Analog and Mixed Signal VLSI, Institute of Microelectronics, University of Macau, Macau, China and Southern Marine Science and Engineering Guangdong Laboratory (Zhu

Lab Chip ; 20(5): 995-1001, 2020 03 03.

Article en En | MEDLINE | ID: mdl-32025666

RESUMEN

Aberration is a long-standing problem of fixed focal lenses and a complicated lens set is usually required to compensate for aberration. It becomes more challenging for tunable lenses. This paper reports an original design of an in-plane optofluidic lens that enables compensation for spherical aberration during the tuning of focal length. The key idea is to use two arrays of electrode strips to symmetrically control the two air/liquid interfaces by the dielectrophoretic effect. The strips work together to define the global shape of the lens interface and thus the focal length, whereas each strip regulates the local curvature of the interface to focus the paraxial and peripheral arrays on the same point. Experiments using a silicone oil droplet demonstrate the tuning of focal length over 500-1400 µm and obtain a longitudinal spherical aberration (LSA) of â¼3.5 µm, which is only 1/24 of the LSA (85 µm) of the spherical lens. Fine adjustment of the applied voltages of strips allows even elimination of the LSA and enabling of the aberration-free tunable lenses. It is the first time that local curvature regulation is used to compensate for the aberration within one in-plane liquid lens. This simple and effective method will find potential applications in lab-on-a-chip systems.

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Texto completo: 1 Colección: 01-internacional Base de datos: MEDLINE Idioma: En Revista: Lab Chip Asunto de la revista: BIOTECNOLOGIA / QUIMICA Año: 2020 Tipo del documento: Article País de afiliación: China Pais de publicación: Reino Unido

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