Print Email Facebook Twitter Stretchable Binary Fresnel Lens for Focus Tuning Title Stretchable Binary Fresnel Lens for Focus Tuning Author Li, X. (TU Delft Electronic Components, Technology and Materials) Wei, L. (TU Delft ImPhys/Optics) Poelma, René H. (TU Delft Electronic Components, Technology and Materials) Vollebregt, S. (TU Delft Electronic Components, Technology and Materials) Wei, J. (TU Delft EKL Processing) Urbach, Paul (TU Delft ImPhys/Optics) Sarro, Pasqualina M (TU Delft Electronic Components, Technology and Materials) Zhang, Kouchi (TU Delft Electronic Components, Technology and Materials) Date 2016-05-03 Abstract 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%. Subject Adaptive opticsCarbon nanotubes and fullerenesMicro-opticsPolymersOA-Fund TU Delft To reference this document use: http://resolver.tudelft.nl/uuid:37053c7e-735d-4fc5-953c-3b37391ac3c8 DOI https://doi.org/10.1038/srep25348 ISSN 2045-2322 Source Scientific Reports, 6 Part of collection Institutional Repository Document type journal article Rights © 2016 X. Li, L. Wei, René H. Poelma, S. Vollebregt, J. Wei, Paul Urbach, Pasqualina M Sarro, Kouchi Zhang Files PDF srep25348.pdf 1.61 MB Close viewer /islandora/object/uuid:37053c7e-735d-4fc5-953c-3b37391ac3c8/datastream/OBJ/view