Syed Ishtiaque M, Kaur Sarabjot, Milton Harry E, Mistry Devesh, Bailey James, Morgan Philip B, Jones J Cliff, Gleeson Helen F
Opt Express. 2015 Apr 20;23(8):9911-6. doi: 10.1364/OE.23.009911.
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.
液晶（LC）隐形眼镜正成为一种令人兴奋的视力矫正技术。据报道，一种垂直排列的向列相液晶透镜，与先前报道的液晶隐形眼镜设计相比，具有更高的光学质量和更简化的制造工艺。该透镜在关闭状态下没有偏振依赖性，施加电压后光焦度可连续变化，最大可达2.00±0.25 D。光焦度的变化是由于向列相液晶层的折射率随电压变化，从1.52变化到最大值1.72。一个器件基板用一种由平面和垂直聚酰亚胺混合而成的取向层进行处理，在切换状态下通过摩擦诱导出优选的指向矢取向。这样就避免了切换过程中可能出现的缺陷，并且该透镜具有出色的光学质量，光焦度可连续变化。
