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Smart Lenses with Electrically Tuneable Astigmatism.

Michele Ghilardi1,2,3, Hugh Boys4,5,6, Peter Török7,8

  • 1School of Engineering and Materials Science, Queen Mary University of London, London, UK.

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|November 8, 2019
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Researchers developed the first electrically reconfigurable, all-elastomer tunable optical lenses. These lenses offer motor-less electrical control of astigmatism and defocus for adaptive optics applications.

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Area of Science:

  • Optics and Photonics
  • Materials Science
  • Electrical Engineering

Background:

  • Reconfigurable optics are crucial for advanced imaging technologies like microscopy and machine vision.
  • Existing tunable lenses often lack compactness, affordability, or precise aberration control.

Purpose of the Study:

  • To introduce the first electrically reconfigurable, fully elastomeric tunable optical lenses.
  • To demonstrate motor-less electrical control of astigmatism and defocus in the visible spectrum.

Main Methods:

  • Utilizing thin dielectric elastomer actuator segments surrounding a soft silicone lens.
  • Applying varied voltage combinations to deform the lens radially or directionally.
  • Integrating the lenses with a commercial camera for functional demonstration.

Main Results:

  • Achieved electrical deformation of the silicone lens to tune defocus and astigmatism up to 3 wavelengths.
  • Demonstrated dynamic control of directional blurring for emphasizing orthogonal spatial features.
  • Showcased lens functionality on a commercial camera system.

Conclusions:

  • The developed smart lenses offer a promising new component for adaptive optics systems.
  • Electrically controlled aberration tuning in these lenses enables highly versatile imaging solutions.
  • This technology advances the development of compact, low-cost, and reconfigurable optical devices.