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Near-critical-angle scattering for the characterization of clouds of bubbles: particular effects |
Applied Optics, Vol. 50, Issue 30, pp. 5759-5769 (2011)
http://dx.doi.org/10.1364/AO.50.005759
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Abstract
We report experimental investigations on the influence of various optical effects on the far-field scattering pattern produced by a cloud of optical bubbles near the critical scattering angle. Among the effects considered, there is the change of the relative refractive index of the bubbles (gas bubbles or some liquid–liquid droplets), the influence of intensity gradients induced by the laser beam intensity profile and by the spatial filtering of the collection optics, the coherent and multiple scattering effects occurring for densely packed bubbles, and the tilt angle of spheroidal optical bubbles. The results obtained herein are thought to be fundamental for the development of future works to model these effects and for the extension of the range of applicability of an inverse technique (referenced herein as the critical angle refractometry and sizing technique), which is used to determine the size distribution and composition of bubbly flows.
© 2011 Optical Society of America
OCIS Codes
(260.1960) Physical optics : Diffraction theory
(280.2490) Remote sensing and sensors : Flow diagnostics
(290.3030) Scattering : Index measurements
(290.3200) Scattering : Inverse scattering
(290.5850) Scattering : Scattering, particles
ToC Category:
Scattering
History
Original Manuscript: May 11, 2011
Revised Manuscript: July 16, 2011
Manuscript Accepted: July 25, 2011
Published: October 11, 2011
Citation
Fabrice R.A. Onofri, Mariusz A. Krzysiek, Séverine Barbosa, Valérie Messager, Kuan-Fang Ren, and Janusz Mroczka, "Near-critical-angle scattering for the characterization of clouds of bubbles: particular effects," Appl. Opt. 50, 5759-5769 (2011)
http://www.opticsinfobase.org/ao/abstract.cfm?URI=ao-50-30-5759
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