Modelling and optimization of micro optofluidic lenses

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Modelling and optimization of micro optofluidic lenses

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Title: Modelling and optimization of micro optofluidic lenses
Author: Song, Chaolong; Nguyen, Nam-Trung; Tan, Say-Hwa; Asundi, Anand Krishna
Copyright year: 2009
Abstract: This paper reports the modelling and experimental results of a liquid-core liquid-cladding optofluidic lens. The lens is based on three laminar streams in a circular chamber. The stream lines and the curvature of the interface can be predicted accurately using the theory of two-dimensional dipole flow in a circularly bounded domain. The model establishes basic relations between the flow rate ratio of the core/cladding streams and the radius of curvature and consequently the focal length of the lens. Compared to a rectangular chamber, this new circular design allows the formation of a liquid-core liquid-cladding lens with perfect curvatures. The circular design allows tuning a perfect curvature ranging from the chamber radius itself to infinity. The test device with a circular lens chamber with 1 mm diameter and 50 µm height was fabricated in PDMS. The lens shape as well as the stream lines were characterized using fluorescent dye and tracing particles. Experimental results agree well with the analytical results predicted by the model.
Subject: DRNTU::Engineering::Mechanical engineering
Type: Journal Article
Series/ Journal Title: Lab on a chip
School: School of Mechanical and Aerospace Engineering
Rights: © 2009 The Royal Society of Chemistry. This is the author created version of a work that has been peer reviewed and accepted for publication by Lab on a Chip, The Royal Society of Chemistry. It incorporates referee’s comments but changes resulting from the publishing process, such as copyediting, structural formatting, may not be reflected in this document. The published version is available at: DOI: [http://dx.doi.org/10.1039/B819158A].
Version: Accepted version

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