Laser-based volumetric colour-coded three-dimensional particle velocimetry

T. J. McGregor*, D. J. Spence, D. W. Coutts

*Corresponding author for this work

    Research output: Contribution to journalArticlepeer-review

    25 Citations (Scopus)

    Abstract

    We present a method of three-dimensional particle velocimetry with a single digital colour camera using multiple colour illumination to encode image depth over a large volume. A copper vapour laser operating at 511 nm is used to pump an optical fibre producing a multiple-wavelength beam via multiple order stimulated Raman scattering. The beam is dispersed and formed into a stack of thin sheets to illuminate a volume of space. The spatial co-ordinates of particles imaged within the illuminated volume are obtained from their imaged x, y positions with depth discerned from particle hue (set by the wavelength of illumination). The method exhibits an RMS depth error of 3% in relation to the thickness of the illuminated region. This paper reports a proof-of-principle of three-dimensional particle imaging using a multi-wavelength laser source with a view to 3D-3C particle velocimetry.

    Original languageEnglish
    Pages (from-to)882-889
    Number of pages8
    JournalOptics and Lasers in Engineering
    Volume45
    Issue number8
    DOIs
    Publication statusPublished - Aug 2007

    Keywords

    • 3D-3C PIV
    • image techniques
    • image analysis
    • laser diagnostics
    • laser imaging

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