Challenges of using dielectric elastomer actuators to tune liquid lens

Gih Keong Lau, Thanh Giang La, Li Lynn Shiau, Adrian Wei Yee Tan

Research output: Chapter in Book/Report/Conference proceedingConference contribution

5 Scopus citations

Abstract

Recently, dielectric elastomer actuators (DEAs) have been adopted to tune liquid membrane lens, just like ciliary muscles do to the lens in human eye. However, it faces some challenges, such as high stress, membrane puncture, high driving voltage requirement, and limited focus distance (not more than 707cm), that limit its practical use. The design problem gets more complex as the liquid lens shares the same elastomeric membrane as the DEA. To address these challenges, we separate DEA from the lens membrane. Instead, a liquid-immersed DEA, which is safe from terminal failure, is used as a diaphragm pump to inflate or deflate the liquid lens by hydraulic pressure. This opens up the possibility that the DEA can be thinned down and stacked up to reduce the driving voltage, independent of the lens membrane thickness. Preliminary study showed that our 8-mm-diameter tunable lens can focus objects in the range of 15cm to 50cm with a small driving voltage of 1.8kV. Further miniaturization of DEA could achieve a driving voltage less than 1kV.

Original languageEnglish
Title of host publicationElectroactive Polymer Actuators and Devices, EAPAD 2014
PublisherSPIE
ISBN (Print)9780819499820
DOIs
StatePublished - 1 Jan 2014
EventElectroactive Polymer Actuators and Devices, EAPAD 2014 - San Diego, CA, United States
Duration: 10 Mar 201413 Mar 2014

Publication series

NameProceedings of SPIE - The International Society for Optical Engineering
Volume9056
ISSN (Print)0277-786X
ISSN (Electronic)1996-756X

Conference

ConferenceElectroactive Polymer Actuators and Devices, EAPAD 2014
CountryUnited States
CitySan Diego, CA
Period10/03/1413/03/14

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