Kang Shengwu, Zhang Xinyu
Appl Opt. 2016 Apr 20;55(12):3333-8. doi: 10.1364/AO.55.003333.
Based on the common liquid crystal microlens, a new compound structure for a liquid crystal (LC) microlens array is proposed. The structure consists of two sub LC microlens arrays with properties of light divergence and convergence. The structure has two LC layers: one to form the positive sub lens, one for the negative. The patterned electrode and plane electrode are used in both sub microlens arrays. When two sub microlens arrays are electrically controlled separately, they can diverge or converge the incident light, respectively. As two sub microlens arrays are both applied on the voltage, the focal length of the compound LC microlens becomes larger than that of the LC microlens with a single LC layer. Another feature of a compound LC microlens array is that it can make the target contour become visible under intense light. The mechanisms are described in detail, and the experimental data are given.
基于常见的液晶微透镜,提出了一种新型的液晶(LC)微透镜阵列复合结构。该结构由两个具有光发散和会聚特性的子LC微透镜阵列组成。该结构有两个LC层:一个用于形成正子透镜,另一个用于形成负子透镜。两个子微透镜阵列均使用图案化电极和平板电极。当两个子微透镜阵列分别进行电控制时,它们可以分别使入射光发散或会聚。当两个子微透镜阵列都施加电压时,复合LC微透镜的焦距比具有单个LC层的LC微透镜的焦距更大。复合LC微透镜阵列的另一个特点是,它可以使目标轮廓在强光下变得可见。详细描述了其原理,并给出了实验数据。