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Atomic Force Microscopy01:08

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A Compact Two-Dimensional Varifocal Scanning Imaging Device Actuated by Artificial Muscle Material.

Yang Cheng1,2, Chuanxun Chen1, Lin Liu1

  • 1Key Laboratory of Biomimetic Robots and Systems, Ministry of Education, Beijing Institute of Technology, Beijing 100081, China.

Biomimetics (Basel, Switzerland)
|March 28, 2023
PubMed
Summary

This study introduces a novel 2D varifocal-scanning imaging device using artificial muscle actuators for continuous focal length adjustment and a wide scanning range. This compact device shows promise for advanced imaging applications.

Keywords:
Alvarez lensartificial muscle materialdecentered lensdielectric elastomertwo-dimensional varifocal scanning

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Area of Science:

  • Optics and Photonics
  • Materials Science
  • Mechanical Engineering

Background:

  • Traditional imaging devices often have fixed focal lengths or limited scanning capabilities.
  • The development of compact, adaptable imaging systems is crucial for next-generation consumer electronics, endoscopy, and microscopy.

Purpose of the Study:

  • To present a compact two-dimensional varifocal-scanning imaging device.
  • To demonstrate the use of artificial muscle material, specifically dielectric elastomer, as a soft actuator for optical components.

Main Methods:

  • Utilized laterally shifting cubic phase masks for varifocal function and decentered lenses for scanning.
  • Employed dielectric elastomer actuators to induce lateral displacements of Alvarez and decentered lenses.
  • Constructed and experimentally validated a prototype of the two-dimensional varifocal-scanning imaging device.

Main Results:

  • Achieved a focal length variation of up to 4.65 times (31.6 mm/6.8 mm).
  • Demonstrated a maximum scanning angle of 26.4°.
  • Reported rise and fall times of 110 ms and 185 ms, respectively.

Conclusions:

  • The proposed varifocal-scanning imaging device, actuated by artificial muscle material, is feasible and effective.
  • The device offers continuous variable focal length and a large scanning range in a compact form factor.
  • Potential applications include consumer electronics, endoscopy, and microscopy.