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Optics Express

Optics Express

  • Editor: Michael Duncan
  • Vol. 14, Iss. 9 — May. 1, 2006
  • pp: 4101–4106

Variable focus dielectric liquid droplet lens

Chih-Cheng Cheng, C. Alex Chang, and J. Andrew Yeh  »View Author Affiliations


Optics Express, Vol. 14, Issue 9, pp. 4101-4106 (2006)
http://dx.doi.org/10.1364/OE.14.004101


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Abstract

A liquid crystal droplet lens driven by the dielectrophoresis (DEP) force was demonstrated. The liquid crystal droplet lens was deformed by the DEP forces under non-uniform AC electric fields. Focal length, hysteresis and electrode design were studied. The focal length varied from 1.6mm to 2.6mm in the range of 0-200V at 1 kHz for electrode spacing of 50μm; that is, the tuning ratio of the focal length was about 60% in maximum. The hysteresis of contact angle was found to be less than 3° and it vanished after 1 minute at the rest state. As the electrode spacing over 200μm, the tuning ratios of the focal length dropped below 5%. The liquid crystal droplet lens that had numerical aperture of about 0.5 consumed power of about 0.1mW. Its response time was measured to be about 220ms.

© 2006 Optical Society of America

OCIS Codes
(220.3630) Optical design and fabrication : Lenses
(230.2090) Optical devices : Electro-optical devices
(230.3720) Optical devices : Liquid-crystal devices

ToC Category:
Optical Devices

History
Original Manuscript: February 24, 2006
Revised Manuscript: April 12, 2006
Manuscript Accepted: April 18, 2006
Published: May 1, 2006

Citation
Chih-Cheng Cheng, C. Alex Chang, and J. Andrew Yeh, "Variable focus dielectric liquid droplet lens," Opt. Express 14, 4101-4106 (2006)
http://www.opticsinfobase.org/oe/abstract.cfm?URI=oe-14-9-4101


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