title: 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.
authors: Department of Condensed Matter Physics and Materials Science, Tata Institute of Fundamental Research, Homi Bhabha Road, Mumbai 400-005, India. atulv@tifr.res.in sghosh@tifr.res.in.
authors: Atul
authors: A
authors: Varshney
authors: Smita
authors: S
authors: Gohil
authors: Somayeh Khajehpour
authors: SK
authors: Tadavani
authors: Anand
authors: A
authors: Yethiraj
authors: S
authors: S
authors: Bhattacharya
authors: Shankar
authors: S
authors: Ghosh