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Applied Optics

Applied Optics

APPLICATIONS-CENTERED RESEARCH IN OPTICS

  • Editor: Joseph N. Mait
  • Vol. 50, Iss. 34 — Dec. 1, 2011
  • pp: H1–H9

Size measurement of bubbles in a cavitation tunnel by digital in-line holography

Denis Lebrun, Daniel Allano, Loïc Méès, Françoise Walle, Frédéric Corbin, Romuald Boucheron, and Didier Fréchou  »View Author Affiliations


Applied Optics, Vol. 50, Issue 34, pp. H1-H9 (2011)
http://dx.doi.org/10.1364/AO.50.0000H1


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Abstract

Digital in-line holography (DIH) with a divergent beam is used to measure size and concentration of cavitation bubbles ( 6 100 μm ) in hydrodynamic facilities. A sampling probe is directly inserted in the cavitation tunnel, and the holograms of the bubbles are recorded through a transparent test section specially designed for DIH measurements. The recording beam coming from a fiber-coupled laser diode illuminates the sample volume, and holograms are recorded by a CMOS camera. From each hologram, the sampling volume can be reconstructed slice by slice by applying a wavelet-based reconstruction method. Because of the geometry of the recording beam, a magnification ratio must be introduced for recovering the 3D location and size of each bubble. The method used for processing holograms recorded in such a configuration is presented. Then, statistical results obtained from 5000 holograms recorded under different pressures in the cavitation tunnel are compared and discussed.

© 2011 Optical Society of America

OCIS Codes
(090.0090) Holography : Holography
(110.2960) Imaging systems : Image analysis
(090.1995) Holography : Digital holography

ToC Category:
Mesurement

History
Original Manuscript: June 1, 2011
Revised Manuscript: July 20, 2011
Manuscript Accepted: July 20, 2011
Published: September 21, 2011

Virtual Issues
Digital Holography and 3D Imaging 2011 (2011) Applied Optics

Citation
Denis Lebrun, Daniel Allano, Loïc Méès, Françoise Walle, Frédéric Corbin, Romuald Boucheron, and Didier Fréchou, "Size measurement of bubbles in a cavitation tunnel by digital in-line holography," Appl. Opt. 50, H1-H9 (2011)
http://www.opticsinfobase.org/ao/abstract.cfm?URI=ao-50-34-H1

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