Adaptive modally addressed liquid crystal lenses

P J W Hands, A K Kirby, G D Love

Research output: Chapter in Book/Report/Conference proceedingChapter (peer-reviewed)

Abstract

An adaptive lens, which has variable focus and is rapidly controllable with simple low-power electronics, has numerous applications in optical telecommunications devices, 3D display systems, miniature cameras and adaptive optics. The University of Durham is developing a range of adaptive liquid crystal lenses, and here we describe work on construction of modal liquid crystal lenses. This type of lens was first described by Naumov [1] and further developed by others [24]. In this system, a spatially varying and circularly symmetric voltage profile can be generated across a liquid-crystal cell, generating a lens-like refractive index profile. Such devices are simple in design, and do not require a pixellated structure. The shape and focussing power of the lens can be controlled by the variation of applied electric field and frequency. Results show adaptive lenses operating at optical wavelengths with continuously variable focal lengths from infinity to 70 cm. Switching speeds are of the order of 1 second between focal positions. Manufacturing methods of our adaptive lenses are presented, together with the latest results to the performance of these devices.

Original languageEnglish
Title of host publicationProceedings of the SPIE - The International Society for Optical Engineering
Subtitle of host publicationLiquid Crystals VIII
EditorsIC Khoo
Place of PublicationBELLINGHAM
PublisherSPIE
Pages136-143
Number of pages8
Volume5518
ISBN (Print)0-8194-5456-7
DOIs
Publication statusPublished - 2 Aug 2004
EventSPIE Optics & Photonics - Denver, United States
Duration: 2 Aug 20045 Aug 2004

Conference

ConferenceSPIE Optics & Photonics
CountryUnited States
CityDenver
Period2/08/045/08/04

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