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Proceedings Paper

Multipass holographic interferometry for low-density gas flow analysis
Author(s): Jean Surget; S. Georges Duvant
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Paper Abstract

Holographic interferometry is a well known method currently used for supersonic gas flow analysis. However, its sensitivity is not high enough to measure low density gas flow, such as those existing in the hypersonic domain. In order to increase the sensitivity, a versatile multipass set-up has been built. Three different methods for selecting a given light pass number, through the wind tunnel test section, have been investigated thanks to a few modifications of the optical set-up. The proposed paper will describe the holographic set-up and the three techniques for passage number selection of the test beam through the studied phenomenon. The results obtained both in laboratory and in a low pressure wind tunnel will be presented.

Paper Details

Date Published: 1 April 1991
PDF: 8 pages
Proc. SPIE 1358, 19th Intl Congress on High-Speed Photography and Photonics, (1 April 1991); doi: 10.1117/12.23967
Show Author Affiliations
Jean Surget, ONERA (France)
S. Georges Duvant, ONERA (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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