中国物理B ›› 2024, Vol. 33 ›› Issue (2): 24103-024103.doi: 10.1088/1674-1056/ad09ce

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Design and fabrication of compound varifocal lens driven by polydimethylsiloxane film elastic deformation

Wen-Hao Miao(缪文浩)1, Ze-Feng Han(韩泽峰)1, Rui Zhao(赵瑞)1,†, Zhong-Cheng Liang(梁忠诚)1, Song-Feng Kou(寇松峰)2,3, and Rong-Qing Xu(徐荣青)1   

  1. 1 Center of Optofluidic Technology, College of Optoelectronic Engineering, Nanjing University of Posts and Telecommunications, Nanjing 210023, China;
    2 Astronomical Observatories/Nanjing Institute of Astronomical Optics & Technology, Chinese Academy of Sciences(CAS), Nanjing 210042, China;
    3 CAS Key Laboratory of Astronomical Optics & Technology, Nanjing Institute of Astronomical Optics & Technology, Nanjing 210042, China
  • 收稿日期:2023-08-22 修回日期:2023-10-25 接受日期:2023-11-06 出版日期:2024-01-16 发布日期:2024-01-16
  • 通讯作者: Rui Zhao E-mail:zhaor@njupt.edu.cn

Design and fabrication of compound varifocal lens driven by polydimethylsiloxane film elastic deformation

Wen-Hao Miao(缪文浩)1, Ze-Feng Han(韩泽峰)1, Rui Zhao(赵瑞)1,†, Zhong-Cheng Liang(梁忠诚)1, Song-Feng Kou(寇松峰)2,3, and Rong-Qing Xu(徐荣青)1   

  1. 1 Center of Optofluidic Technology, College of Optoelectronic Engineering, Nanjing University of Posts and Telecommunications, Nanjing 210023, China;
    2 Astronomical Observatories/Nanjing Institute of Astronomical Optics & Technology, Chinese Academy of Sciences(CAS), Nanjing 210042, China;
    3 CAS Key Laboratory of Astronomical Optics & Technology, Nanjing Institute of Astronomical Optics & Technology, Nanjing 210042, China
  • Received:2023-08-22 Revised:2023-10-25 Accepted:2023-11-06 Online:2024-01-16 Published:2024-01-16
  • Contact: Rui Zhao E-mail:zhaor@njupt.edu.cn

摘要: A compound varifocal lens based on electromagnetic drive technology is designed and fabricated, where the polydimethylsiloxane (PDMS) film acts as a driving component, while the PDMS biconvex lens and the plane-concave lens form a coaxial compound lens system. The plane-concave lens equipped with driving coils is installed directly above the PDMS lens surrounded by the annular magnet. When different currents are applied, the annular magnet moves up and down, driving the PDMS film to undergo elastic deformation, and then resulting in longitudinal movement of the PDMS lens. The position change of the PDMS lens changes the focal length of the compound lens system. To verify the feasibility and practicability of this design, a prototype of our compound lens system is fabricated in experiment. Our proposed compound lens shows that its zoom ability reaches 9.28 mm when the current ranges from -0.20 A to 0.21 A.

关键词: compound varifocal lens, PDMS film, elastic deformation, focal length, electromagnetic force, zoom ability

Abstract: A compound varifocal lens based on electromagnetic drive technology is designed and fabricated, where the polydimethylsiloxane (PDMS) film acts as a driving component, while the PDMS biconvex lens and the plane-concave lens form a coaxial compound lens system. The plane-concave lens equipped with driving coils is installed directly above the PDMS lens surrounded by the annular magnet. When different currents are applied, the annular magnet moves up and down, driving the PDMS film to undergo elastic deformation, and then resulting in longitudinal movement of the PDMS lens. The position change of the PDMS lens changes the focal length of the compound lens system. To verify the feasibility and practicability of this design, a prototype of our compound lens system is fabricated in experiment. Our proposed compound lens shows that its zoom ability reaches 9.28 mm when the current ranges from -0.20 A to 0.21 A.

Key words: compound varifocal lens, PDMS film, elastic deformation, focal length, electromagnetic force, zoom ability

中图分类号:  (Applied classical electromagnetism)

  • 41.20.-q
42.30.-d (Imaging and optical processing) 42.79.-e (Optical elements, devices, and systems)