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Applied Optics

Applied Optics

APPLICATIONS-CENTERED RESEARCH IN OPTICS

  • Vol. 22, Iss. 10 — May. 15, 1983
  • pp: 1454–1461

Digital image processing of flow visualization photographs

Lambertus Hesselink and Benjamin S. White  »View Author Affiliations


Applied Optics, Vol. 22, Issue 10, pp. 1454-1461 (1983)
http://dx.doi.org/10.1364/AO.22.001454


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Abstract

This paper is concerned with the propagation of laser light through a slab of a randomly varying medium. A theoretical analysis is presented which relates the spectrum of the recorded-intensity field some distance downstream of the medium to the spectrum of the index-of-refraction field. For a homogeneous and isotropic random field, the 3-D spectrum of the medium is obtained from the 2-D spectrum of the photograph by dividing each component of the spectrum by the frequency raised to the fourth power. Free-space propagation outside the random medium is accounted for by a scaling factor. Experimental results are presented which support the theoretical analysis. The nonintrusive diagnostic technique presented here is applicable to photographs which contain partially developed caustic networks.

© 1983 Optical Society of America

History
Original Manuscript: July 1, 1982
Published: May 15, 1983

Citation
Lambertus Hesselink and Benjamin S. White, "Digital image processing of flow visualization photographs," Appl. Opt. 22, 1454-1461 (1983)
http://www.opticsinfobase.org/ao/abstract.cfm?URI=ao-22-10-1454

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