Tubular Focus-Tunable Fluidic Lens Based on Structured Polyimide Foils
Tubular Focus-Tunable Fluidic Lens Based on Structured Polyimide Foils
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DOI：
10.1109/lpt.2015.2506187
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发表时间：
2016-03
影响因子：
2.6
通讯作者：
D. Kopp;H. Zappe
中科院分区：
文献类型：
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作者：
D. Kopp;H. Zappe
我们展示了一种全新的方法来制造焦距可调流体透镜，使用管状几何结构，具有很大的设计灵活性。该技术的基础是将有图案的柔性聚合物箔插入圆柱形管中，圆柱形管中填充了两种不同折射率的液体。电润湿用于液/液界面的驱动，从而实现焦点可调。为了展示这种方法的实用性，我们演示了一个孔径为4.5 mm、后焦距可调7倍的单液体透镜，该透镜要求驱动电压低于100 Vrms。管状几何光学导致了高光学表面质量在整个驱动范围内，波前误差的均方根值低于λ/2，主要是由球差。
We demonstrate an entirely new means for fabrication of focus-tunable fluidic lenses using a tubular geometry with great design flexibility. The technology is based on patterned, flexible polymeric foils inserted into a cylindrical tube, which is filled with two liquids of different refractive indices. Electrowetting is used for actuation of the liquid/liquid interface, thus realizing focus tunability. To show the utility of this approach, a single liquid lens with a 4.5-mm aperture and of a back focal length tuning by a factor of 7, requiring actuation voltages below 100 Vrms, is demonstrated. The tubular geometry optical resulted in a high optical surface quality over the entire actuation range, with rms values for wavefront error below λ/2, is dominated by spherical aberration.