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Autofocus Fluid Lens Device with Implementation of Dielectric Electroactive Polymer Actuators

Kiveste, Harti and Haus, Henry and Gatti, Davide and Schlaak, Helmut F. and Aabloo, Alvo and Kiefer, Rudolf (2014):
Autofocus Fluid Lens Device with Implementation of Dielectric Electroactive Polymer Actuators.
In: ACTUATOR14, 14th International Conference on New Actuators and 8th International Exhibition on Smart Actuators and Drive Systems, Bremen, Germany, 23.Jun.-25.Jun. 2014, [Conference or Workshop Item]

Abstract

We produced an autofocus liquid lens based on meniscus changes of an oil/water interface caused by fieldinduced deformation of a dielectric elastomer stack actuator (DESA). The new DESA design integrated in the liquid lens is based on a circular actuator with a round hole in the middle (diameter: 4 mm) where the oil/water interface is located. Due to the surface tension between the two immiscible liquids (oil/water) a meniscus forms in proximity of the hole of the actuator membrane that can operate as a lens. The goal of this research was to apply and investigate encapsulated dielectric elastomer actuators (DEA) in liquid environments for producing a prototype autofocus lens. When the DEA membrane is applied a high voltage, the hole dimension changes by contraction of the DEA membrane, together with the curvature of the meniscus formed between oil and water. Consequently, the focus plane of a laser beam passing through the liquid lens changes. Configurations with DESA actuator or single-layered membranes are tested. Depending on the DEA membrane thicknesses (45 to 100 μm), the maximum applied voltage varied from 1150 to 2250 V.

Item Type: Conference or Workshop Item
Erschienen: 2014
Creators: Kiveste, Harti and Haus, Henry and Gatti, Davide and Schlaak, Helmut F. and Aabloo, Alvo and Kiefer, Rudolf
Title: Autofocus Fluid Lens Device with Implementation of Dielectric Electroactive Polymer Actuators
Language: English
Abstract:

We produced an autofocus liquid lens based on meniscus changes of an oil/water interface caused by fieldinduced deformation of a dielectric elastomer stack actuator (DESA). The new DESA design integrated in the liquid lens is based on a circular actuator with a round hole in the middle (diameter: 4 mm) where the oil/water interface is located. Due to the surface tension between the two immiscible liquids (oil/water) a meniscus forms in proximity of the hole of the actuator membrane that can operate as a lens. The goal of this research was to apply and investigate encapsulated dielectric elastomer actuators (DEA) in liquid environments for producing a prototype autofocus lens. When the DEA membrane is applied a high voltage, the hole dimension changes by contraction of the DEA membrane, together with the curvature of the meniscus formed between oil and water. Consequently, the focus plane of a laser beam passing through the liquid lens changes. Configurations with DESA actuator or single-layered membranes are tested. Depending on the DEA membrane thicknesses (45 to 100 μm), the maximum applied voltage varied from 1150 to 2250 V.

Uncontrolled Keywords: liquid lens, dielectric elastomer transducers
Divisions: 18 Department of Electrical Engineering and Information Technology > Institute for Electromechanical Design > Microtechnology and Electromechanical Systems
18 Department of Electrical Engineering and Information Technology > Institute for Electromechanical Design
18 Department of Electrical Engineering and Information Technology
Event Title: ACTUATOR14, 14th International Conference on New Actuators and 8th International Exhibition on Smart Actuators and Drive Systems
Event Location: Bremen, Germany
Event Dates: 23.Jun.-25.Jun. 2014
Date Deposited: 17 Feb 2015 08:08
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