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Experimental validation of opto-thermo-elastic modeling in OOFELIE Multiphysics
Mazzoli, Alexandra; Saint-Georges, Philippe; Orban, Anne et al.
2011In SPIE, Optical Systems Design (Marseille 5-8 septembre 2011)
 

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Keywords :
OOFELIE; Multiphysics; lens; YAG laser rod; Thermo-elastic; interferometer; birefringence; polarization
Abstract :
[en] 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 modelling guidelines and improvements. For that purpose two optical systems have been analysed. The first one is a spherical lens fixed in an aluminium barrel, which is the simplest structure found in an optomechanical 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 optomechanical 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 multiphysics toolkit treating coupled problems of optics, mechanics, thermal physics, electricity, electromagnetism, acoustics and hydrodynamics. From this comparison modelling guidelines have been issued with the aim of improving the accuracy of computed thermo-elastic distortions and their impact on the optical performances.
Disciplines :
Physics
Author, co-author :
Mazzoli, Alexandra  ;  Université de Liège - ULiège > CSL (Centre Spatial de Liège)
Saint-Georges, Philippe;  Open Engineering
Orban, Anne ;  Université de Liège - ULiège > CSL (Centre Spatial de Liège)
Ruess, Jean-Sébastien;  GDTech
Loicq, Jerôme ;  Université de Liège - ULiège > CSL (Centre Spatial de Liège)
Barbier, Christian ;  Université de Liège - ULiège > CSL (Centre Spatial de Liège)
Stockman, Yvan ;  Université de Liège - ULiège > CSL (Centre Spatial de Liège)
Georges, Marc ;  Université de Liège - ULiège > CSL (Centre Spatial de Liège)
Nachtergaele, Philippe;  Open Engineering
Paquay, Stéphane;  Open Engineering
De Vincenzo, Pascal;  Open Engineering
Language :
English
Title :
Experimental validation of opto-thermo-elastic modeling in OOFELIE Multiphysics
Publication date :
2011
Event name :
SPIE Conference on Optical System Design
Event place :
Marseille, France
Event date :
September 2011
Audience :
International
Main work title :
SPIE, Optical Systems Design (Marseille 5-8 septembre 2011)
Available on ORBi :
since 03 November 2011

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