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Related Experiment Video

Updated: Jan 19, 2026

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Electrically controlled liquid-crystal microlens matrix with a nested electrode array for efficiently tuning and

Mingce Chen, Huiying Wang, Wanwan Dai

    Optics Express
    |September 13, 2019
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    Summary

    A novel electrically controlled liquid-crystal microlens matrix (EC-LCMM) enables 3D focus adjustment. This new device offers efficient tuning and swinging of focus for advanced optical applications.

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    Area of Science:

    • Optics and Photonics
    • Materials Science
    • Electrical Engineering

    Background:

    • Liquid-crystal microlens matrices (LCMMs) are crucial for adaptive optics.
    • Existing LCMMs often have limitations in focus adjustability and efficiency.
    • Three-dimensional (3D) focus control is a growing demand in optical systems.

    Purpose of the Study:

    • To propose and demonstrate a new electrically controlled liquid-crystal microlens matrix (EC-LCMM).
    • To achieve efficient 3D focus tuning and swinging capabilities.
    • To explore the application of this EC-LCMM in wavefront measurement and adjustment.

    Main Methods:

    • Fabrication of a 10 × 10 arrayed annular-sector-shaped aluminum electrode with a central microhole.
    • Construction of the EC-LCMM using patterned electrodes.
    • Electrical control of liquid crystal alignment to modify focal properties.
    • Characterization of focusing and focus swing performance.

    Main Results:

    • The developed EC-LCMM allows for electrical focus tuning along the optical axis (voltage range 3–7Vrms, focal length 2–0.6mm).
    • Demonstrated focus swing capability with a maximum distance of 16μm.
    • Defined and measured focus swing efficiency parameters (SF ~16‰, SA ~7.6%).

    Conclusions:

    • The proposed EC-LCMM offers efficient 3D focus adjustment.
    • The device shows promise for integration into Shack-Hartmann wavefront measuring and adjusting architectures.
    • This technology advances adaptive optical systems requiring precise focus control.