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Optics Letters

| RAPID, SHORT PUBLICATIONS ON THE LATEST IN OPTICAL DISCOVERIES

  • Editor: Alan E. Willner
  • Vol. 35, Iss. 3 — Feb. 1, 2010
  • pp: 336–338

Tunable-focus flat liquid-crystal diffractive lens

Pouria Valley, David L. Mathine, Mohammad Reza Dodge, Jim Schwiegerling, Gholam Peyman, and N. Peyghambarian  »View Author Affiliations


Optics Letters, Vol. 35, Issue 3, pp. 336-338 (2010)
http://dx.doi.org/10.1364/OL.35.000336


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Abstract

We demonstrate an innovative variable-focus flat liquid-crystal diffractive lens (LCDL) with 95% diffraction efficiency and millisecond switching times using a ±2.4 V ac input. This lens is based on the electrical modulation of a 3 μ m layer of nematic liquid-crystal sandwiched between a Fresnel zone electrode structure and a reference substrate. Each zone is divided into 12 subzones to digitize the phase profiles and define the phase wrapping points. The focusing power can rapidly be switched by electrically changing the number of subzones and re-establishing the wrapping points. Potential applications include zooms with no moving parts and autofocus lenses for compact imaging devices.

© 2010 Optical Society of America

OCIS Codes
(010.1080) Atmospheric and oceanic optics : Active or adaptive optics
(230.3720) Optical devices : Liquid-crystal devices
(050.1965) Diffraction and gratings : Diffractive lenses

ToC Category:
Optical Devices

History
Original Manuscript: November 23, 2009
Revised Manuscript: December 11, 2009
Manuscript Accepted: December 14, 2009
Published: January 26, 2010

Citation
Pouria Valley, David L. Mathine, Mohammad Reza Dodge, Jim Schwiegerling, Gholam Peyman, and N. Peyghambarian, "Tunable-focus flat liquid-crystal diffractive lens," Opt. Lett. 35, 336-338 (2010)
http://www.opticsinfobase.org/ol/abstract.cfm?URI=ol-35-3-336


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