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Stretchable Binary Fresnel Lens for Focus Tuning

Journal Article (2016)
Author(s)

X. Li (TU Delft - Electronic Components, Technology and Materials)

L. Wei (TU Delft - ImPhys/Optics)

René H. Poelma (TU Delft - Electronic Components, Technology and Materials)

S Vollebregt (TU Delft - Electronic Components, Technology and Materials)

J. Wei (TU Delft - EKL Processing)

Paul Urbach (TU Delft - ImPhys/Optics)

P. M. Sarro (TU Delft - Electronic Components, Technology and Materials)

Guo Qi Zhang (TU Delft - Electronic Components, Technology and Materials)

Research Group
Electronic Components, Technology and Materials
Copyright
© 2016 X. Li, L. Wei, René H. Poelma, S. Vollebregt, J. Wei, Paul Urbach, Pasqualina M Sarro, Kouchi Zhang
DOI related publication
https://doi.org/10.1038/srep25348
More Info
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Publication Year
2016
Language
English
Copyright
© 2016 X. Li, L. Wei, René H. Poelma, S. Vollebregt, J. Wei, Paul Urbach, Pasqualina M Sarro, Kouchi Zhang
Research Group
Electronic Components, Technology and Materials
Volume number
6
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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%.