Novel switching mode in a vertically aligned liquid crystal contact lens.
Novel switching mode in a vertically aligned liquid crystal contact lens.
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DOI：
10.1364/oe.23.009911
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发表时间：
2015-04
期刊：
影响因子：
3.8
通讯作者：
Ishtiaque M. Syed;S. Kaur;H. Milton;D. Mistry;J. Bailey;Philip B. Morgan;J. Cliff Jones;H. Gleeson
中科院分区：
文献类型：
--
作者：
Ishtiaque M. Syed;S. Kaur;H. Milton;D. Mistry;J. Bailey;Philip B. Morgan;J. Cliff Jones;H. Gleeson
液晶(LC)隐形眼镜是一种令人兴奋的视力矫正技术。报道了一种同向(垂直)对准的LC隐形眼镜，与以前报道的LC隐形眼镜设计相比，提供了更好的光学质量和简化的构造技术。该透镜在关断状态下与偏振无关，并在施加电压的情况下产生高达2.00±0.25D的连续光功率变化。光功率的变化是由电压引起的向列相LC层折射率的变化引起的，从1.52到最大值1.72。一个器件衬底用取向层处理，该取向层是平面和同向异性聚酰亚胺的混合物，摩擦以在开关状态中诱导优选的导向器取向。因此，避免了在切换过程中可能出现的缺陷，并且透镜在焦距连续变化的情况下表现出良好的光学质量。
Liquid crystal (LC) contact lenses are emerging as an exciting technology for vision correction. A homeotropically (vertical) aligned LC lens is reported that offers improved optical quality and simplified construction techniques over previously reported LC contact lens designs. The lens has no polarization dependence in the off state and produces a continuous change in optical power of up to 2.00 ± 0.25 D with a voltage applied. The variation in optical power results from the voltage-induced change in refractive index of the nematic LC layer, from 1.52 to a maximum of 1.72. One device substrate is treated with an alignment layer that is a mixture of planar and homeotropic polyimides, rubbed to induce a preferred director orientation in the switched state. Defects that could occur during switching are thus avoided and the lens exhibits excellent optical quality with a continuous variation in focal power.