Chen Mingce, Dai Wanwan, Shao Qi, Wang Huiying, Liu Zhonglun, Niu Leilei, Zhang Xinyu, Wang Haiwei, Xie Changsheng
Appl Opt. 2019 Aug 20;58(24):6611-6617. doi: 10.1364/AO.58.006611.
An electrically controlled arc-electrode liquid-crystal microlens array (AE-LCMLA), with tuning and swing focus, is proposed, which can be utilized to replace the traditional mechanically controlled microlenses and also cooperate with photosensitive arrays to solve the problems of measuring and further adjusting a strong distortion wavefront. The top patterned electrode of a single LC microlens is composed of three arc-electrodes distributed symmetrically around a central microhole for constructing the key controlling structures of the LC cavity in the AE-LCMLA. All the arc-electrodes are individually controlled, and then the focal spot of each microlens can be moved freely in a three-dimensional fashion including along the optical axial direction and over the focal plane by simply adjusting the driving signal voltage applied over each arc-electrode, independently. The featured performances of the AE-LCMLA in a wavelength range of ∼501-561 nm are the driving signal voltage being relatively low (less than ∼11 V), the focal length tuning range being from ∼2.54 mm to ∼3.50 mm, the maximum focus swing distance being ∼52.92 μm, and the focus swing ratio K being ∼20‰.
提出了一种具有调谐和摆动聚焦功能的电控电弧电极液晶微透镜阵列（AE-LCMLA），它可用于替代传统的机械控制微透镜，还能与光敏阵列配合，以解决强畸变波前的测量和进一步调整问题。单个液晶微透镜的顶部图案化电极由围绕中心微孔对称分布的三个电弧电极组成，用于构建AE-LCMLA中液晶腔的关键控制结构。所有电弧电极均单独控制，然后通过简单地独立调节施加在每个电弧电极上的驱动信号电压，每个微透镜的焦点就能在包括沿光轴方向和焦平面上方的三维空间中自由移动。AE-LCMLA在约501-561nm波长范围内的特性表现为：驱动信号电压相对较低（小于约11V），焦距调谐范围为约2.54mm至约3.50mm，最大焦点摆动距离为约52.92μm，焦点摆动比K为约20‰。
