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Issue 7, 2014
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Large scale arrays of tunable microlenses

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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

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The article was received on 14 Oct 2013, accepted on 12 Dec 2013 and first published on 13 Dec 2013

Article type: Paper
DOI: 10.1039/C3LC51170G
Citation: Lab Chip, 2014,14, 1330-1335
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    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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