Varshney, Atul and Gohil, Smita and Tadavani, Somayeh Khajehpour and Yethiraj, Anand and Bhattacharyaa, S. and Ghosh, Shankar (2013) Large scale arrays of tunable microlenses. Lab on a Chip, 14. pp. 1330-1334. ISSN 1473-0189
- Published Version
Available under License Creative Commons Attribution Non-commercial.
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.
|Department(s):||Science, Faculty of > Physics and Physical Oceanography|
|Date:||13 December 2013|
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