Liquid Crystal Microlens Arrays With Switchable Positive and Negative Focal Lengths

被引：60
作者：
Fan, Yun-Hsing [1 ]
Ren, Hongwen [1 ,2 ]
Liang, Xiao [1 ,3 ]
Wang, Haiying [1 ]
Wu, Shin-Tson [1 ,4 ]
机构：
[1] Univ Cent Florida, Coll Opt & Photon, Orlando, FL 32816 USA
[2] Univ Cent Florida, Coll Opt & Photon CREOL FPCE, Orlando, FL 32816 USA
[3] Tsinghua Univ, Beijing, Peoples R China
[4] Hughes Res Labs, Malibu, CA 90265 USA
来源：
JOURNAL OF DISPLAY TECHNOLOGY | 2005年 / 1卷 / 01期
关键词：
Adaptive optics; liquid crystal (LC) devices; LC displays; microlens arrays; tunable focal length;
D O I：
10.1109/JDT.2005.853268
中图分类号：
TM [电工技术]; TN [电子技术、通信技术];
学科分类号：
0808 ; 0809 ;
摘要：
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.
引用
收藏
页码：151 / 156
页数：6
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