Membrane-less variable focus liquid lens with manual actuation
Membrane-less variable focus liquid lens with manual actuation
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DOI：
10.1016/j.optcom.2016.12.021
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发表时间：
2017-04
影响因子：
2.4
通讯作者：
R. Patra;S. Agarwal;S. Kondaraju;S. Bahga
中科院分区：
文献类型：
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作者：
R. Patra;S. Agarwal;S. Kondaraju;S. Bahga
我们提出了一种可调的、无膜的、机械润湿的液体透镜，其可以使用诸如螺杆或活塞的线性致动器手动致动。液体透镜的工作原理是使两种不同折射率的不混溶液体分离的界面变形，同时将三相接触线钉扎在透镜孔径的尖锐边缘。我们的透镜设计改进了现有的机械润湿透镜的设计，消除了复杂的致动机构的使用，而不影响光学性能。我们演示了液体透镜的操作，通过简单的旋转螺杆将其功率从负到正来回调节。我们还提出了一个分析描述的透镜的焦距，并验证它与详细的实验测量。我们的实验表明，液体透镜的焦距可以重复调谐，没有任何滞后和重力的不利影响。
We present a tunable, membrane-less, mechanical-wetting liquid lens that can be actuated manually using a linear actuator such as screw or piston. The operation of the liquid lens is based on deforming the interface separating two immiscible liquids with different refractive indices, while pinning the three-phase contact line at the sharp edge of lens aperture. Our lens design improves upon the existing designs of mechanical-wetting lenses by eliminating the use of complex actuation mechanisms, without compromising on the optical performance. We demonstrate the operation of the liquid lens by tuning its power back and forth from negative to positive by simple rotation of a screw. We also present an analytical description of the focal length of the lens and validate it with detailed experimental measurements. Our experiments show that the focal length of the liquid lens can be tuned repeatably without any adverse effects of hysteresis and gravity.