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Proceedings Paper

Tunable grating with active feedback
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Paper Abstract

We report on the use of capacitive self-sensing to operate a DEA-based tunable grating in closed-loop mode. Due to their large strain capabilities, DEAs are key candidates for tunable optics applications. However, the viscoelasticity of elastomers is detrimental for applications that require long-term stability, such as tunable gratings and lenses. We show that capacitive sensing of the electrode strain can be used to suppress the strain drift and increase the response speed of silicone-based actuators. On the other hand, VHB actuators exhibit a time-dependent permittivity, which causes a drift between the device capacitance and its strain.

Paper Details

Date Published: 9 April 2013
PDF: 11 pages
Proc. SPIE 8687, Electroactive Polymer Actuators and Devices (EAPAD) 2013, 86872F (9 April 2013); doi: 10.1117/12.2009358
Show Author Affiliations
Samuel Rosset, Ecole Polytechnique Fédérale de Lausanne (Switzerland)
Benjamin M. O'Brien, The Univ. of Auckland (New Zealand)
Todd Gisby, The Univ. of Auckland (New Zealand)
Daniel Xu, The Univ. of Auckland (New Zealand)
Herbert R. Shea, Ecole Polytechnique Fédérale de Lausanne (Switzerland)
Iain A. Anderson, The Univ. of Auckland (New Zealand)


Published in SPIE Proceedings Vol. 8687:
Electroactive Polymer Actuators and Devices (EAPAD) 2013
Yoseph Bar-Cohen, Editor(s)

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