Issue 7, 2014

Large scale arrays of tunable microlenses

Abstract

We demonstrate a simple and robust method to produce large 2-dimensional and quasi-3-dimensional arrays of tunable liquid microlenses using a time varying external electric field as the only control parameter. With increasing frequency, the shape of the individual lensing elements (~40 μm in diameter) evolves from an oblate (lentil shaped) to a prolate (egg shaped) spheroid, thereby making the focal length a tunable quantity. Moreover, such microlenses can be spatially localized in desired configurations by patterning the electrode. This system has the advantage that it provides a large dynamic range of shape deformation (with a response time of ~30 ms for the whole range of deformation), which is useful in designing adaptive optics.

Graphical abstract: Large scale arrays of tunable microlenses

Supplementary files

Article information

Article type
Paper
Submitted
14 Oct 2013
Accepted
12 Dec 2013
First published
13 Dec 2013

Lab Chip, 2014,14, 1330-1335

Large scale arrays of tunable microlenses

A. Varshney, S. Gohil, S. K. Tadavani, A. Yethiraj, S. Bhattacharya and S. Ghosh, Lab Chip, 2014, 14, 1330 DOI: 10.1039/C3LC51170G

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