Optofluidic laser scanner based on a rotating liquid prism

We demonstrate an electrowetting-actuated optofluidic system based on a rotatable liquid prism implemented as a two-dimensional laser scanner. The system is fabricated through a novel technology using a patterned flexible polymeric foil on which a high density of electrodes is structured and which i...

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Bibliographic Details
Published in:Applied optics (2004) 2016-03, Vol.55 (9), p.2136-2142
Main Authors: Kopp, Daniel, Lehmann, Lukas, Zappe, Hans
Format: Article
Language:English
Subjects:
Arrays
Cylinders
Deflection
Electrodes
Lasers
Liquids
Optical scanners
Prisms
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Summary:We demonstrate an electrowetting-actuated optofluidic system based on a rotatable liquid prism implemented as a two-dimensional laser scanner. The system is fabricated through a novel technology using a patterned flexible polymeric foil on which a high density of electrodes is structured and which is subsequently inserted into a cylindrical housing. The resulting radial electrode array is used for electrowetting actuation of two fluids filled into the cylinder, which allows a controllable tilt and orientation of the planar liquid interface and thus represents a tunable rotating prism. Finite element simulations and subsequent experimental verification show that this highly planar and precisely positionable liquid/liquid interface may be actuated to a deflection angle of ±6.4°, with a standard deviation of ±0.18°, and rotated 360° about the vertical axis. Power consumption is limited to several microwatts, and switching times of several hundred milliseconds were determined.
ISSN:1559-128X
2155-3165
DOI:10.1364/AO.55.002136