Liquid Crystal Microlens Arrays With Switchable Positive and Negative Focal Lengths

    Authors

    Y. H. Fan; H. W. Ren; X. Liang; H. Y. Wang;S. T. Wu

    Comments

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    Abbreviated Journal Title

    J. Disp. Technol.

    Keywords

    Adaptive optics; liquid crystal (LC) devices; LC displays; microlens; arrays; tunable focal length; Engineering, Electrical & Electronic; Optics; Physics, Applied

    Abstract

    A flat microlens array whose focal length can be switched from positive to negative by electric field is demonstrated experimentally and confirmed by computer simulations. To generate the required gradient refractive index, an inhomogeneous electric field is created by a spherical indium-tin-oxide (ITO) electrode which is imbedded in the top flat substrate. The bottom substrate has a planar ITO electrode on its inner surface. A thin polymeric layer is overcoated on top of the spherical ITO to create a flat surface. The disclination lines are eliminated. Because of the employed dual-frequency liquid crystal, the microlens array has fast response times.

    Journal Title

    Journal of Display Technology

    Volume

    1

    Issue/Number

    1

    Publication Date

    1-1-2005

    Document Type

    Article

    Language

    English

    First Page

    151

    Last Page

    156

    WOS Identifier

    WOS:000207089100017

    ISSN

    1551-319X

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