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Varifocal liquid lens based on microelectrofluidic technology |
Optics Letters, Vol. 37, Issue 21, pp. 4377-4379 (2012)
http://dx.doi.org/10.1364/OL.37.004377
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Abstract
This Letter presents a tunable liquid lens based on microelectrofluidic technology. In the microelectrofluidic lens (MEFL), electrowetting in the hydrophobic surface channel induces the Laplace pressure difference between two fluidic interfaces on the lens aperture and the surface channel. Then, the pressure difference makes the lens curvature tunable. In spite of the contact angle saturation, the narrow surface channel increases the Laplace pressure to have a wide range of optical power variation in the MEFL. The magnitude of the applied voltage determines the lens curvature in the analog mode MEFL. Digital operation is also possible when the control electrodes of the MEFL are patterned to have an array. The lens aperture and maximum surface channel diameter were designed to 3.2 mm and 6.4 mm, respectively, with a channel height of 0.2 mm for an optical power range between
© 2012 Optical Society of America
OCIS Codes
(230.0230) Optical devices : Optical devices
(230.4685) Optical devices : Optical microelectromechanical devices
ToC Category:
Optical Devices
History
Original Manuscript: August 2, 2012
Manuscript Accepted: September 10, 2012
Published: October 17, 2012
Citation
Jong-hyeon Chang, Kyu-Dong Jung, Eunsung Lee, Minseog Choi, Seungwan Lee, and Woonbae Kim, "Varifocal liquid lens based on microelectrofluidic technology," Opt. Lett. 37, 4377-4379 (2012)
http://www.opticsinfobase.org/ol/abstract.cfm?URI=ol-37-21-4377
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