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Three-Dimensional Optical Tomographic Imaging of Supersonic Jets through Inversion of Phase Data Obtained through the Transport-of-Intensity Equation

H. Thayyullathil, R.V.V.L. Langoju, P. Renganathan, R.M. Vasu, R. Kanjirodan, L.M. Patnaik

Applied Optics, vol. 43, no. 21, pp. 4133-4141, July 20, 2004.


We report experimental results of quantitative imaging in supersonic circular jets by using a monochromatic light probe. An expanding cone of light interrogates a three-dimensional volume of a supersonic steady-state flow from a circular jet. The distortion caused to the spherical wave by the presence of the jet is determined through our measuring normal intensity transport. A cone-beam tomographic algorithm is used to invert wave-front distortion to changes in refractive index introduced by the flow. The refractive index is converted into density whose cross sections reveal shock and other characteristics of the flow.

@ARTICLE(http://bigwww.epfl.ch/publications/thayyullathil0401.html,
AUTHOR="Thayyullathil, H. and Langoju, R.V.V.L. and Renganathan, P. and
	Vasu, R.M. and Kanjirodan, R. and Patnaik, L.M.",
TITLE="Three-Dimensional Optical Tomographic Imaging of Supersonic Jets
	through Inversion of Phase Data Obtained through the
	Transport-of-Intensity Equation",
JOURNAL="Applied Optics",
YEAR="2004",
volume="43",
number="21",
pages="4133--4141",
month="July 20,",
note="")

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