Fang Chunlong, Cao Yuanzhi, Jiang Dongdong, Tian Jiarui, Zhang Chi
CAS Center for Excellence in Nanoscience, Beijing Key Laboratory of Micro-nano Energy and Sensor, Beijing Institute of Nanoenergy and Nanosystems, Chinese Academy of Sciences, 100083 Beijing, P.R. China.
School of Nanoscience and Technology, University of Chinese Academy of Sciences, 100049 Beijing, P.R. China.
Microsyst Nanoeng. 2020 Aug 10;6:61. doi: 10.1038/s41378-020-0174-y. eCollection 2020.
Electrically modulated varifocal liquid lenses, which are usually modulated by an external high voltage power source, have attracted much attention due to their bright application prospects in artificial optical systems. Here, a triboelectric nanogenerator (TENG)-based varifocal liquid lens (TVLL) has been demonstrated, in which the focal length can be directly modulated by external mechanical sliding. A dielectrophoretic force is generated by the TENG through the transfer of triboelectric charges in the asymmetric electrodes, which is used to continuously change the shape of the air-liquid interface between concave and convex without any complicated boost converter. Moreover, a triboelectric magnifying glass based on the accurate modulation effect of the TVLL on a light beam has been demonstrated. In this work, the TENG is used as a medium to modulate and accurately control the focal length of the liquid lens by an external mechanical stimulus, which may have great applications in micro-optical-electro-mechanical systems (MOEMS), human-machine interaction, artificial vision systems, etc.
电调制变焦液体透镜通常由外部高压电源调制，因其在人工光学系统中广阔的应用前景而备受关注。在此，已展示了一种基于摩擦纳米发电机（TENG）的变焦液体透镜（TVLL），其中焦距可通过外部机械滑动直接调制。TENG通过不对称电极中摩擦电荷的转移产生介电泳力，该力用于连续改变凹面和凸面之间气液界面的形状，而无需任何复杂的升压转换器。此外，基于TVLL对光束的精确调制效应，已展示了一种摩擦放大镜。在这项工作中，TENG用作介质，通过外部机械刺激来调制并精确控制液体透镜的焦距，这在微光学机电系统（MOEMS）、人机交互、人工视觉系统等方面可能具有重大应用。
