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Proceedings Paper

Approach for applying holographic interferometry to cases of strong gradients of index of refraction in a fluid using large modifications
Author(s): Walter Schumann
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Paper Abstract

The use of holographic interferometry to determine large deformations of opaque bodies by compensating modifications when reconstructing has been treated previously in several publications. The present contribution concerns a similar investigation in the case of a domain with a strong spatial change of the index of refraction as for instance in a gas with a high temperature gradient. Firstly, the general theory about the analogy between both fields as well as the image aberration and the fringe modification is outlined. Secondly, a development of the fringe vector in the case of a moderate index gradient is performed, leading to an approach for measuring the integral of the lateral gradient of the index along the curved ray.

Paper Details

Date Published: 2 March 1993
PDF: 12 pages
Proc. SPIE 1732, Holographics International '92, (2 March 1993); doi: 10.1117/12.140439
Show Author Affiliations
Walter Schumann, Swiss Federal Institute of Technology (Switzerland)

Published in SPIE Proceedings Vol. 1732:
Holographics International '92
Yuri N. Denisyuk; Frank Wyrowski, Editor(s)

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