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Proceedings Paper

Instantaneous measurement of density from double-simultaneous interferograms
Author(s): Jean-Michel Desse; Jean-Claude Pegneaux
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Paper Abstract

The visualization technique presented herein is based on white light differential interferometry using large Wollaston biprisms. The particularity of our set-up is that it yields two instantaneous interferograms, taken at precisely the same time, on which the interference fringes are differently oriented. Thus, the instantaneous fields of two different partial derivatives of density are simultaneously recorded and it is possible, through the use of both, to obtain the value of the density in domains where this cannot be done using a single interferogram. This method has been successfully tested in the two-dimensional unsteady flow past a cylinder.

Paper Details

Date Published: 1 April 1991
PDF: 9 pages
Proc. SPIE 1358, 19th Intl Congress on High-Speed Photography and Photonics, (1 April 1991); doi: 10.1117/12.23959
Show Author Affiliations
Jean-Michel Desse, Institut de Mecanique des Fluides (France)
Jean-Claude Pegneaux, Institut de Mecanique des Fluides (France)

Published in SPIE Proceedings Vol. 1358:
19th Intl Congress on High-Speed Photography and Photonics
Peter W. W. Fuller, Editor(s)

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