Optical shield: measuring viscosity of turbid fluids using optical tweezers.

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.

• Publication year

  2012

• Venue

  Optics Express

• Publication date

  2012-05-21

• Fields of study

  Medicine, Physics

• Identifiers
  DOI 10.1364/OE.20.012127PMID 22714199
• External record

  Open on Semantic Scholar

• Source metadata

  Semantic Scholar, PubMed

• No claims are published for this paper.

• No concepts are published for this paper.

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