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

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

Research output: Contribution to journalArticleResearchpeer-review

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.

LanguageEnglish
Pages882-889
Number of pages8
JournalOptics and Lasers in Engineering
Volume45
Issue number8
DOIs
Publication statusPublished - Aug 2007

Fingerprint

Velocity measurement
Color
color
Wavelength
Lasers
Lighting
lasers
Stimulated Raman scattering
illumination
wavelengths
Optical fibers
Copper
Cameras
Vapors
Pumps
Imaging techniques
optical fibers
cameras
vapors
Raman spectra

Keywords

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

Cite this

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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.",
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Laser-based volumetric colour-coded three-dimensional particle velocimetry. / McGregor, T. J.; Spence, D. J.; Coutts, D. W.

In: Optics and Lasers in Engineering, Vol. 45, No. 8, 08.2007, p. 882-889.

Research output: Contribution to journalArticleResearchpeer-review

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