High-efficiency switchable flat diffractive ophthalmic lens with three-layer electrode pattern and two-layer via structures

Guoqiang Li, Pouria Valley, Pekka Äyräs, David L. Mathine, Seppo Honkanen, Nasser N Peyghambarian

Research output: Contribution to journalArticle

46 Citations (Scopus)

Abstract

A general design for switchable, flat, liquid crystal diffractive lens with three-layer electrode pattern and two-layer via structures is reported for near-, intermediate-, and distance-vision corrections of presbyopic eyes. The microfabricated transparent concentric ring electrodes are distributed in two layers and different voltages are applied to each electrode through bus lines in another layer. Connection between the electrodes and the bus lines is achieved by vias (conducting holes for vertical interconnections) in the third dimension. For demonstration, a lens is first tuned with a focal length of 1 m (1 diopter add power), eight-level phase modulation, and diffraction efficiency above 92% and then reconfigured to operate as a 2 diopter four-level lens with a diffraction efficiency of 78%. The lens operates with low voltages and a rise time of 150 ms. This design methodology allows the aperture needed for practical use and a power-failure-safe configuration.

Original languageEnglish (US)
Article number111105
JournalApplied Physics Letters
Volume90
Issue number11
DOIs
StatePublished - 2007

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lenses
electrodes
diffraction
phase modulation
low voltage
apertures
liquid crystals
methodology
conduction
rings
electric potential
configurations

ASJC Scopus subject areas

  • Physics and Astronomy (miscellaneous)

Cite this

High-efficiency switchable flat diffractive ophthalmic lens with three-layer electrode pattern and two-layer via structures. / Li, Guoqiang; Valley, Pouria; Äyräs, Pekka; Mathine, David L.; Honkanen, Seppo; Peyghambarian, Nasser N.

In: Applied Physics Letters, Vol. 90, No. 11, 111105, 2007.

Research output: Contribution to journalArticle

Li, Guoqiang ; Valley, Pouria ; Äyräs, Pekka ; Mathine, David L. ; Honkanen, Seppo ; Peyghambarian, Nasser N. / High-efficiency switchable flat diffractive ophthalmic lens with three-layer electrode pattern and two-layer via structures. In: Applied Physics Letters. 2007 ; Vol. 90, No. 11.
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