Multi-point holographic optical velocimetry in microfluidic systems

Jonathan Leach; Roberto di Leonardo; Hasan Mushfique; Jon Cooper; Miles Padgett

doi:10.1117/12.683463

11 September 2006 Multipoint holographic optical velocimetry in microfluidic systems

Jonathan Leach, Roberto di Leonardo, Hasan Mushfique, Jon Cooper, Miles Padgett

Proceedings Volume 6326, Optical Trapping and Optical Micromanipulation III; 63261J (2006) https://doi.org/10.1117/12.683463
Event: SPIE Optics + Photonics, 2006, San Diego, California, United States

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.

Citation Download Citation

Jonathan Leach, Roberto di Leonardo, Hasan Mushfique, Jon Cooper, and Miles Padgett "Multipoint holographic optical velocimetry in microfluidic systems", Proc. SPIE 6326, Optical Trapping and Optical Micromanipulation III, 63261J (11 September 2006); https://doi.org/10.1117/12.683463

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