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Proceedings Paper

The Dalembertometer
Author(s): P. Smigielski; P. G. Sava
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Paper Abstract

We present a new device, utilizing a He-Ne 5 mW laser as a light source, and including a Mach-Zehnder interferometer coupled with schlieren systems with defocalised phase plates permitting the measurement of the dalembertian of the optical path along a trajectory of the laser beam in a transparent medium. This device which required a long development, as much optically as electronically, is used for the study of noise sources in the air jets. The particularities of the system are described and its performances are illustrated by applications in aerodynamics.

Paper Details

Date Published: 20 May 1980
PDF: 5 pages
Proc. SPIE 0210, 2nd European Congress on Optics Applied to Metrology, (20 May 1980); doi: 10.1117/12.958322
Show Author Affiliations
P. Smigielski, French-German Research Institute of Saint-Louis (France)
P. G. Sava, French-German Research Institute of Saint-Louis (France)

Published in SPIE Proceedings Vol. 0210:
2nd European Congress on Optics Applied to Metrology
Michel H. Grosmann; Patrick Meyrueis, Editor(s)

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