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Applied Optics

Applied Optics

APPLICATIONS-CENTERED RESEARCH IN OPTICS

  • Editor: James C. Wyant
  • Vol. 45, Iss. 10 — Apr. 1, 2006
  • pp: 2166–2173

Use of dynamic schlieren interferometry to study fluctuations during free diffusion

Fabrizio Croccolo, Doriano Brogioli, Alberto Vailati, Marzio Giglio, and David S. Cannell  »View Author Affiliations


Applied Optics, Vol. 45, Issue 10, pp. 2166-2173 (2006)
http://dx.doi.org/10.1364/AO.45.002166


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Abstract

We used a form of schlieren interferometry to measure the mean-squared amplitude and temporal autocorrelation function of concentration fluctuations driven by the presence of a gradient during the free diffusion of a urea solution into water. By taking and processing sequences of images separated in time by less than the shortest correlation time of interest, we were able to simultaneously measure dynamics at a number of different wave vectors. The technique is conceptually similar to the shadowgraph method, which has been used to make similar measurements, but the schlieren method has the advantage that the transfer function is wave-vector independent rather than oscillatory.

© 2006 Optical Society of America

OCIS Codes
(030.6600) Coherence and statistical optics : Statistical optics
(070.2580) Fourier optics and signal processing : Paraxial wave optics
(070.6760) Fourier optics and signal processing : Talbot and self-imaging effects
(110.4850) Imaging systems : Optical transfer functions
(290.5820) Scattering : Scattering measurements

ToC Category:
Photon Correlation and Scattering

History
Original Manuscript: August 15, 2005
Manuscript Accepted: September 22, 2005

Citation
Fabrizio Croccolo, Doriano Brogioli, Alberto Vailati, Marzio Giglio, and David S. Cannell, "Use of dynamic schlieren interferometry to study fluctuations during free diffusion," Appl. Opt. 45, 2166-2173 (2006)
http://www.opticsinfobase.org/ao/abstract.cfm?URI=ao-45-10-2166

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