Library
local_library Home Repository

Stretchable Binary Fresnel Lens for Focus Tuning

Journal Article (2016)
Author(s)

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

Lei Wei (TU Delft - ImPhys/Optics)

Rene Poelma (TU Delft - Electronic Components, Technology and Materials)

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

Jia Wei (TU Delft - EKL Processing)

Paul Urbach (TU Delft - ImPhys/Optics)

Lina 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
DOI related publication
https://doi.org/10.1038/srep25348
More Info
expand_more
Publication Year
2016
Language
English
Research Group
Electronic Components, Technology and Materials
Volume number
6
Reuse Rights

Other than for strictly personal use, it is not permitted to download, forward or distribute the text or part of it, without the consent of the author(s) and/or copyright holder(s), unless the work is under an open content license such as Creative Commons.

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%.