Mishra Kartikeya, van den Ende Dirk, Mugele Frieder
Physics of Complex Fluids Group, MESA+ Institute, University of Twente, P.O. Box 217, 7500 AE Enschede, The Netherlands.
Micromachines (Basel). 2016 Jun 10;7(6):102. doi: 10.3390/mi7060102.
Optofluidics is a rapidly growing versatile branch of adaptive optics including a wide variety of applications such as tunable beam shaping tools, mirrors, apertures, and lenses. In this review, we focus on recent developments in optofluidic lenses, which arguably forms the most important part of optofluidics devices. We report first on a number of general characteristics and characterization methods for optofluidics lenses and their optical performance, including aberrations and their description in terms of Zernike polynomials. Subsequently, we discuss examples of actuation methods separately for spherical optofluidic lenses and for more recent tunable aspherical lenses. Advantages and disadvantages of various actuation schemes are presented, focusing in particular on electrowetting-driven lenses and pressure-driven liquid lenses that are covered by elastomeric sheets. We discuss in particular the opportunities for detailed aberration control by using either finely controlled electric fields or specifically designed elastomeric lenses.
光流体学是自适应光学中一个快速发展的通用分支，包括各种应用，如可调光束整形工具、镜子、孔径和透镜。在本综述中，我们重点关注光流体透镜的最新进展，光流体透镜可以说是光流体设备中最重要的部分。我们首先报告了光流体透镜的一些一般特性、表征方法及其光学性能，包括像差及其用泽尼克多项式的描述。随后，我们分别讨论了球形光流体透镜和最新的可调非球面透镜的驱动方法示例。介绍了各种驱动方案的优缺点，特别关注电润湿驱动透镜和由弹性体片覆盖的压力驱动液体透镜。我们特别讨论了通过使用精细控制的电场或专门设计的弹性体透镜来实现详细像差控制的机会。
