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Proceedings Paper

Multi-point holographic optical velocimetry in microfluidic systems
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Paper Abstract

We demonstrate a technique for the multi-point measurement of fluid flow in microscopic geometries. The technique consists of an array of microprobes can be simultaneously trapped and used to map out the fluid flow in a microfluidic device. The optical traps are alternately turned on and off such that the probe particles are displaced by the flow of the surrounding fluid and then re-trapped. The particles' displacements are monitored by digital video microscopy and directly converted into velocity field values. The techniques described have potential to be extended to drive an integrated lab-on-chip device, where pumping, flow measurement and optical sensing could all be achieved by structuring a single laser beam.

Paper Details

Date Published: 11 September 2006
PDF: 6 pages
Proc. SPIE 6326, Optical Trapping and Optical Micromanipulation III, 63261J (11 September 2006); doi: 10.1117/12.683463
Show Author Affiliations
Jonathan Leach, Univ. of Glasgow (United Kingdom)
Roberto di Leonardo, INFM-CRS SOFT, Univ. di Roma (Italy)
Hasan Mushfique, Univ. of Glasgow (United Kingdom)
Jon Cooper, Univ. of Glasgow (United Kingdom)
Miles Padgett, INFM-CRS SOFT, Univ. di Roma (Italy)

Published in SPIE Proceedings Vol. 6326:
Optical Trapping and Optical Micromanipulation III
Kishan Dholakia; Gabriel C. Spalding, Editor(s)

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