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Virtual Journal for Biomedical Optics

Virtual Journal for Biomedical Optics


  • Editor: Gregory W. Faris
  • Vol. 3, Iss. 11 — Oct. 22, 2008

Laser Doppler field sensor for high resolution flow velocity imaging without camera

Andreas Voigt, Christian Bayer, Katsuaki Shirai, Lars Büttner, and Jürgen Czarske  »View Author Affiliations

Applied Optics, Vol. 47, Issue 27, pp. 5028-5040 (2008)

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In this paper we present a laser sensor for highly spatially resolved flow imaging without using a camera. The sensor is an extension of the principle of laser Doppler anemometry (LDA). Instead of a parallel fringe system, diverging and converging fringes are employed. This method facilitates the determination of the tracer particle position within the measurement volume and leads to an increased spatial and velocity resolution compared to conventional LDA. Using a total number of four fringe systems the flow is resolved in two spatial dimensions and the orthogonal velocity component. Since no camera is used, the resolution of the sensor is not influenced by pixel size effects. A spatial resolution of 4 μm in the x direction and 16 μm in the y direction and a relative velocity resolution of 1 × 10 3 have been demonstrated up to now. As a first application we present the velocity measurement of an injection nozzle flow. The sensor is also highly suitable for applications in nano- and microfluidics, e.g., for the measurement of flow rates.

© 2008 Optical Society of America

OCIS Codes
(120.3940) Instrumentation, measurement, and metrology : Metrology
(120.7250) Instrumentation, measurement, and metrology : Velocimetry
(170.3340) Medical optics and biotechnology : Laser Doppler velocimetry

ToC Category:
Instrumentation, Measurement, and Metrology

Original Manuscript: February 15, 2008
Revised Manuscript: July 30, 2008
Manuscript Accepted: August 8, 2008
Published: September 19, 2008

Virtual Issues
Vol. 3, Iss. 11 Virtual Journal for Biomedical Optics

Andreas Voigt, Christian Bayer, Katsuaki Shirai, Lars Büttner, and Jürgen Czarske, "Laser Doppler field sensor for high resolution flow velocity imaging without camera," Appl. Opt. 47, 5028-5040 (2008)

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