Instantaneous measurement of density from double-simultaneous interferograms

Jean-Michel Desse; Jean-Claude Pegneaux

doi:10.1117/12.23959

1 April 1991 Instantaneous measurement of density from double-simultaneous interferograms

Jean-Michel Desse, Jean-Claude Pegneaux

Proceedings Volume 1358, 19th Intl Congress on High-Speed Photography and Photonics; (1991) https://doi.org/10.1117/12.23959
Event: 19th International Congress on High-Speed Photography and Photonics, 1990, Cambridge, United Kingdom

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.

Citation Download Citation

Jean-Michel Desse and Jean-Claude Pegneaux "Instantaneous measurement of density from double-simultaneous interferograms", Proc. SPIE 1358, 19th Intl Congress on High-Speed Photography and Photonics, (1 April 1991); https://doi.org/10.1117/12.23959

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