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Proceedings Paper

Experimental validation of opto-thermo-elastic modeling in OOFELIE multiphysics
Author(s): Alexandra Mazzoli; Philippe Saint-Georges; Anne Orban; Jean-Sébastien Ruess; Jérôme Loicq; Christian Barbier; Yvan Stockman; Marc Georges; Philippe Nachtergaele; Stéphane Paquay; Pascal De Vincenzo
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Paper Abstract

The objective of this work is to demonstrate the correlation between a simple laboratory test bench case and the predictions of the OOFELIE Multiphysics software in order to deduce modeling guidelines and improvements. For that purpose two optical systems have been analyzed. The first one is a spherical lens fixed in an aluminium barrel, which is the simplest structure found in an opto-mechanical system. In this study, material characteristics are assumed to be well known: BK7 and aluminium have been retained. Temperature variations between 0 and +60°C from ambient have been applied to the samples. The second system is a YAG laser bar heated by means of a dedicated oven. For the two test benches thermo-elastic distortions have been measured using a Fizeau interferometer. This sensor measures wavefront error in the range of 20 nm to 1 μm without physical contact with the opto-mechanical system. For the YAG bar, birefringence and polarization measurements have also been performed using a polarimetric bench. The tests results have been compared to the predictions obtained by OOFELIE Multiphysics which is a simulation software dedicated to multiphysics coupled problems involving optics, mechanics, thermal physics, electricity, electromagnetism, acoustics and hydrodynamics. From this comparison modeling guidelines have been issued with the aim of improving the accuracy of computed thermo-elastic distortions and their impact on the optical performances.

Paper Details

Date Published: 22 September 2011
PDF: 15 pages
Proc. SPIE 8167, Optical Design and Engineering IV, 81671I (22 September 2011); doi: 10.1117/12.896515
Show Author Affiliations
Alexandra Mazzoli, Univ. de Liège (Belgium)
Philippe Saint-Georges, Open Engineering S.A. (Belgium)
Anne Orban, Univ. de Liège (Belgium)
Jean-Sébastien Ruess, GDTech S.A. (Belgium)
Jérôme Loicq, Univ. de Liège (Belgium)
Christian Barbier, Univ. de Liège (Belgium)
Yvan Stockman, Univ. de Liège (Belgium)
Marc Georges, Univ. de Liège (Belgium)
Philippe Nachtergaele, Open Engineering S.A. (Belgium)
Stéphane Paquay, Open Engineering S.A. (Belgium)
Pascal De Vincenzo, Open Engineering S.A. (Belgium)


Published in SPIE Proceedings Vol. 8167:
Optical Design and Engineering IV
Jean-Luc M. Tissot; Laurent Mazuray; Rolf Wartmann; Jeffrey M. Raynor; Andrew Wood, Editor(s)

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