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Lorentz Force Actuated Tunable-Focus Liquid Lens.

Kari L Van Grinsven1, Alireza Ousati Ashtiani2, Hongrui Jiang3,4,5,6,7

  • 1Department of Electrical and Computer Engineering, University of Wisconsin-Madison, Madison, WI 53706, USA. kvangrinsven@wisc.edu.

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|October 27, 2019
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Summary
This summary is machine-generated.

This study introduces a novel magnetically actuated liquid lens that adjusts focal length using electrical current. This tunable-focus lens offers a wide focal range and can function as both converging and diverging optics.

Keywords:
liquid lensmagnetic actuatoroptofluidicstunable lens

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Area of Science:

  • Optics and Photonics
  • Materials Science

Background:

  • Traditional optical systems rely on mechanical lens movement, which is often impractical.
  • Liquid lenses offer an alternative for tunable focus applications.

Purpose of the Study:

  • To develop and characterize a magnetically actuated liquid lens.
  • To demonstrate its tunable focal length and imaging capabilities.

Main Methods:

  • Utilized Lorentz force actuation via electrical current to alter lens shape.
  • Employed a Shack-Hartmann wavefront sensor for aberration characterization.
  • Performed imaging tests to assess resolution.

Main Results:

  • Achieved a wide tunable focal length range: -305 mm to -111 mm (diverging) and 272 mm to 146 mm (converging).
  • Characterized lens aberrations during actuation.
  • Demonstrated imaging resolution of 7.13 line pairs per millimeter.

Conclusions:

  • The magnetically actuated liquid lens provides a versatile, electronically controllable focusing solution.
  • This technology has potential applications in compact optical systems and cameras.