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Related Experiment Video

Updated: Jun 22, 2026

Free-form Light Actuators — Fabrication and Control of Actuation in Microscopic Scale
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Dielectrically actuated liquid lens.

Chih-Cheng Cheng, J Andrew Yeh

    Optics Express
    |June 24, 2009
    PubMed
    Summary
    This summary is machine-generated.

    This study demonstrates a novel liquid lens using dielectric force, achieving tunable focal lengths from 34mm to 12mm. The lens shows stable performance with minimal spherical aberration, offering potential for advanced optical systems.

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    Area of Science:

    • Optics and Photonics
    • Materials Science

    Background:

    • Liquid lenses offer tunable focal lengths, crucial for compact and adaptive optical systems.
    • Dielectric actuation provides a low-power method for controlling liquid lens properties.

    Purpose of the Study:

    • To demonstrate a packaged liquid lens actuated by dielectric force.
    • To characterize the optical performance and response times of the liquid lens.

    Main Methods:

    • Fabrication of a liquid lens using immiscible liquids with differing dielectric constants under iso-density conditions.
    • Electrical characterization of focal length tunability (0-200V) and contact angle hysteresis.
    • Measurement of focal spot size, response times, and power consumption.

    Main Results:

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    • Tunable focal length from 34mm to 12mm for a 3mm aperture lens with applied voltage (0-200V).
    • Observed contact angle hysteresis up to 12.5 degrees at 120V.
    • Focal spot size of ~80µm, rise/fall times of 650ms/300ms, and 1mW power consumption at 200V/1kHz.
    • Longitudinal and transverse spherical aberrations remained invariant for focal lengths >20mm.

    Conclusions:

    • The demonstrated liquid lens effectively utilizes dielectric force for tunable optics.
    • The device exhibits promising optical quality and low power consumption for potential applications in imaging and adaptive optics.