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Optics Letters

Optics Letters


  • Vol. 1, Iss. 4 — Oct. 1, 1977
  • pp: 135–137

Measuring fluid velocities with speckle patterns

D. B. Barker and M. E. Fourney  »View Author Affiliations

Optics Letters, Vol. 1, Issue 4, pp. 135-137 (1977)

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A new full-field technique for mapping lines of constant velocity in a fluid flow is demonstrated. The technique utilizes light scattered from scattering sites within a selected plane of interest of the flow field. The laser-speckle pattern thus formed is used with the established methods of speckle photography and interferometry to determine the velocity field. A double pulsed ruby laser is used to measure the velocity profile in a circular pipe. Turbulent flow fields will place a limitation on the technique; this limit is primarily a function of available equipment.

© 1977 Optical Society of America

Original Manuscript: June 1, 1977
Published: October 1, 1977

D. B. Barker and M. E. Fourney, "Measuring fluid velocities with speckle patterns," Opt. Lett. 1, 135-137 (1977)

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  1. J. A. Leendertz, “Interferometric displacement measurement on scattering surfaces utilizing speckle effect,” J. Phys. E 3, 214–218 (1970). [CrossRef]
  2. E. Archbold, J. M. Burch, A. E. Ennos, “Recording of in-plane surface displacement by double exposure speckle photography,” Opt. Acta 17, 883–898 (1970). [CrossRef]
  3. E. Archbold, A. E. Ennos, “Displacement measurement from double-exposed laser photographs,” Opt. Acta 19, 253–271 (1972). [CrossRef]
  4. D. B. Barker, M. E. Fourney, “Displacement measurements in the interior of 3-D bodies using scattered light speckle patterns,” Exp. Mech. 16:6, 209–214 (1976). [CrossRef]
  5. D. B. Barker, M. E. Fourney, “Three-dimensional speckle interferometric investigation of the stress-intensity factor along a crack front” Exp. Mech. 17:7, 241–247 (1977). [CrossRef]
  6. M. E. Fourney, J. H. Matkin, A. P. Waggoner, “Aerosol size and velocity determination via holography,” Rev. Sci. Instrum. 40, 205–2131969. [CrossRef]
  7. H. Schlichting, Boundary Layer Theory (McGraw-Hill, New York, 1962).

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