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Virtual Journal for Biomedical Optics

Virtual Journal for Biomedical Optics

| EXPLORING THE INTERFACE OF LIGHT AND BIOMEDICINE

  • Editors: Andrew Dunn and Anthony Durkin
  • Vol. 7, Iss. 7 — Jun. 25, 2012

Optical shield: measuring viscosity of turbid fluids using optical tweezers

M. P. Lee, A. Curran, G. M. Gibson, M. Tassieri, N. R. Heckenberg, and M. J. Padgett  »View Author Affiliations


Optics Express, Vol. 20, Issue 11, pp. 12127-12132 (2012)
http://dx.doi.org/10.1364/OE.20.012127


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Abstract

The viscosity of a fluid can be measured by tracking the motion of a suspended micron-sized particle trapped by optical tweezers. However, when the particle density is high, additional particles entering the trap compromise the tracking procedure and degrade the accuracy of the measurement. In this work we introduce an additional Laguerre–Gaussian, i.e. annular, beam surrounding the trap, acting as an optical shield to exclude contaminating particles.

© 2012 OSA

OCIS Codes
(140.7010) Lasers and laser optics : Laser trapping
(230.6120) Optical devices : Spatial light modulators

ToC Category:
Optical Trapping and Manipulation

History
Original Manuscript: April 11, 2012
Revised Manuscript: May 4, 2012
Manuscript Accepted: May 7, 2012
Published: May 14, 2012

Virtual Issues
Vol. 7, Iss. 7 Virtual Journal for Biomedical Optics

Citation
M. P. Lee, A. Curran, G. M. Gibson, M. Tassieri, N. R. Heckenberg, and M. J. Padgett, "Optical shield: measuring viscosity of turbid fluids using optical tweezers," Opt. Express 20, 12127-12132 (2012)
http://www.opticsinfobase.org/vjbo/abstract.cfm?URI=oe-20-11-12127


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