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Tunable dielectric liquid lens on flexible substrate.

Yen-Sheng Lu1, Hongen Tu2, Yong Xu2

  • 1Department of Electrical and Computer Engineering, University of Wisconsin-Madison, Madison, Wisconsin 53706, USA.

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|February 5, 2014
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Summary

We developed a tunable-focus dielectric liquid lens (DLL) on a flexible substrate. This innovative lens offers variable focal length and is ideal for reconfigurable optical systems and expanded fields of view.

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Area of Science:

  • Optics and Photonics
  • Materials Science

Background:

  • Dielectric liquid lenses (DLLs) offer tunable focal lengths for optical systems.
  • Flexible substrates are increasingly important for wearable and reconfigurable devices.

Purpose of the Study:

  • To fabricate and characterize a tunable-focus DLL on a flexible polydimethylsiloxane substrate.
  • To demonstrate the DLL's functionality when integrated into a goggle system.

Main Methods:

  • Fabrication of a DLL on a flexible polydimethylsiloxane substrate.
  • Integration of the DLL onto a goggle surface.
  • Electrical tuning of the lens's focal length via applied voltage.

Main Results:

  • The DLL exhibited a tunable focal length from 14.2 to 6.3 mm within 1.3 seconds with increasing voltage up to 125 Vrms.
  • The lens achieved a resolving power of 17.95 line pairs per mm.
  • Successful demonstration of functionality on a flexible, curvilinear goggle surface.

Conclusions:

  • The flexible DLL is a viable component for reconfigurable optical systems.
  • The technology shows promise for applications requiring an expanded field of view.
  • DLLs on flexible substrates offer new possibilities in optical device design.