Tunable-focus flat liquid-crystal diffractive lens

Optics Letters
Pouria ValleyNasser Peyghambarian

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 mum 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.

References

Jan 13, 2004·Applied Optics·Boris ApterEldad Bahat-Treidel
Apr 7, 2006·Proceedings of the National Academy of Sciences of the United States of America·Guoqiang LiNasser Peyghambarian
May 10, 1995·Applied Optics·D W Sweeney, G E Sommargren

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Citations

Nov 12, 2013·Ophthalmic & Physiological Optics : the Journal of the British College of Ophthalmic Opticians (Optometrists)·W Neil Charman
Jul 1, 2010·Optics Express·Antonin MiksPavel Novak
Jul 31, 2012·Lab on a Chip·D C ZografopoulosR Beccherelli
Jul 19, 2011·Optics Letters·Raouf BarbozaGaetano Assanto
Nov 13, 2013·Optics Express·Yu-Ju TsaiDavid R Smith
Mar 10, 2018·Optics Express·Stefan Bernet, Monika Ritsch-Marte
Aug 4, 2010·Optics Letters·Pouria ValleyN Peyghambarian
Feb 8, 2013·Optics Express·Chia-Ting HsiehChi-Yen Huang
Apr 20, 2011·Optics Express·Pouria ValleyN Peyghambarian
Jul 1, 2010·Optics Express·Hongwen RenShin-Tson Wu
Jul 10, 2012·Applied Optics·Chia-Hao KuoChi-Huang Lin
Apr 15, 2015·Optics Letters·A K SrivastavaH S Kwok
Jan 13, 2018·Optics Letters·Jeroen BeeckmanKristiaan Neyts
Nov 22, 2018·Applied Optics·Stefan Bernet
Apr 3, 2013·Optics Express·Stefan BernetMonika Ritsch-Marte
Apr 7, 2010·Optics Letters·Antonin Miks, Jiri Novák
Mar 7, 2021·Micromachines·Rowan MorrisMamatha Nagaraj
Jun 19, 2021·Applied Optics·Erol OzgurN Peyghambarian

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