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Proceedings Paper

Artificial eyelid for protection of optical sensors
Author(s): Scott H. Goodwin-Johansson; Paul H. Holloway; Gary McGuire; Leonard J. Buckley; Robert F. Cozzens; Robert W. Schwartz; Gregory J. Exarhos
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Paper Abstract

A novel concept for protection of optical sensor will be described. The device consist of a transparent substrate, a transparent conducting electrode, insulating polymers, and a reflective top electrode layer. Using thin film deposition and photolithographic fabrication techniques commonly available for manufacture of integrated circuits, plus spin coating as commonly used for polymers, the layers can be placed on the substrate and arrays of apertures created with sizes ranging from micrometers to millimeters. Due to the stress gradient between the polymer dielectric and the reflective metal electrodes, the composite thin film structure will open over the aperture area once a 'release layer' is removed by chemical treatment. This is the 'open' condition for the 'eyelid'. By applying a voltage between the transparent conducting the metal electrodes, an electrostatic force is created which closes the 'eyelid'. Upon elimination of the voltage, the stress gradient opens the 'eyelid' again. Preliminary devices have been fabricated and operated up to a frequency of 4kHz and at lifetimes of over 1010 cycles. The power consumption is extremely low. The potential of this technology for a variety of applications will be discussed.

Paper Details

Date Published: 7 June 2000
PDF: 7 pages
Proc. SPIE 3987, Smart Structures and Materials 2000: Electroactive Polymer Actuators and Devices (EAPAD), (7 June 2000); doi: 10.1117/12.387781
Show Author Affiliations
Scott H. Goodwin-Johansson, MCNC (United States)
Paul H. Holloway, Univ. of Florida (United States)
Gary McGuire, MCNC (United States)
Leonard J. Buckley, Naval Research Lab. (United States)
Robert F. Cozzens, Naval Research Lab. (United States)
Robert W. Schwartz, Clemson Univ. (United States)
Gregory J. Exarhos, Pacific Northwest National Lab. (United States)

Published in SPIE Proceedings Vol. 3987:
Smart Structures and Materials 2000: Electroactive Polymer Actuators and Devices (EAPAD)
Yoseph Bar-Cohen, Editor(s)

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