Stretchable Binary Fresnel Lens for Focus Tuning.
Stretchable Binary Fresnel Lens for Focus Tuning.
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DOI：
10.1038/srep25348
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发表时间：
2016-05-03
影响因子：
4.6
通讯作者：
Zhang GQ
中科院分区：
文献类型：
--
作者：
Li X;Wei L;Poelma RH;Vollebregt S;Wei J;Urbach HP;Sarro PM;Zhang GQ
介绍了一种采用圆片级微细加工技术制作的可调谐二元振幅菲涅耳透镜。菲涅尔透镜是通过将光刻定义的垂直排列的碳纳米管束封装在聚二甲基硅氧烷(PDMS)层中而制成的。该复合透镜材料结合了碳纳米管优异的光学吸收性能和PDMS的透明性和延伸性。通过在径向拉伸弹性复合材料，可以调节透镜焦距。结果表明，该系统具有良好的对焦响应，通过拉伸透镜可获得较大的对焦变化(≥为24%)，最高可达11.4%。
This paper presents a tuneable binary amplitude Fresnel lens produced by wafer-level microfabrication. The Fresnel lens is fabricated by encapsulating lithographically defined vertically aligned carbon nanotube (CNT) bundles inside a polydimethyl-siloxane (PDMS) layer. The composite lens material combines the excellent optical absorption properties of the CNT with the transparency and stretchability of the PDMS. By stretching the elastomeric composite in radial direction, the lens focal length is tuned. Good focusing response is demonstrated and a large focus change (≥24%) was achieved by stretching lenses up to 11.4%.