Biconvex Polymer Microlenses with Tunable Imaging Properties Designed by Janus Droplet MicrofluidicsReportar como inadecuado




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Precision and Intelligence Laboratory, Tokyo Institute of Technology, R2-6, 4259 Nagatsuta-cho, Midori-ku,Yokohama, Kanagawa 226-8503, Japan





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Academic Editors: Andrew deMello and Xavier Casadevall i Solvas

Abstract This work presents a technique for fabricating biconvex polymer microlenses using microfluidics, and then evaluates their tunable optical properties. A glass microfluidic channel was employed to rapidly mass-produce nanoliter-sized biphasic Janus droplets, which consist of a biconvex segment of a photocurable monomer and a concave-convex segment of a non-curable silicone oil that contained a surfactant. Subsequent photopolymerization produces polymeric biconvex spherical microlenses with templated dual curvatures. By changing the flow-rate ratios of the photocurable and non-curable droplet phases in the microfluidic channel, the radii of curvature of the two lens surfaces and the thicknesses of the resultant microlenses can be varied. The resulting biconvex microlenses with different shapes were used in image projection experiments. Different magnification properties were observed, and were consistent with the properties estimated quantitatively from the geometrical parameters of the lenses. View Full-Text

Keywords: microfluidics; Janus droplet; biconvex microlens; interfacial tension microfluidics; Janus droplet; biconvex microlens; interfacial tension





Autor: Takasi Nisisako * , Haruka Suzuki and Takeshi Hatsuzawa

Fuente: http://mdpi.com/



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