Reference : Experimental validation of opto-thermo-elastic modeling in OOFELIE Multiphysics
Scientific congresses and symposiums : Paper published in a book
Physical, chemical, mathematical & earth Sciences : Physics
http://hdl.handle.net/2268/101518
Experimental validation of opto-thermo-elastic modeling in OOFELIE Multiphysics
English
Mazzoli, Alexandra mailto [Université de Liège - ULg > > CSL (Centre Spatial de Liège) >]
Saint-Georges, Philippe mailto [Open Engineering > > > >]
Orban, Anne mailto [Université de Liège - ULg > > CSL (Centre Spatial de Liège) >]
Ruess, Jean-Sébastien mailto [GDTech > > > >]
Loicq, Jerôme mailto [Université de Liège - ULg > > CSL (Centre Spatial de Liège) >]
Barbier, Christian mailto [Université de Liège - ULg > > CSL (Centre Spatial de Liège) >]
Stockman, Yvan mailto [Université de Liège - ULg > > CSL (Centre Spatial de Liège) >]
Georges, Marc mailto [Université de Liège - ULg > > CSL (Centre Spatial de Liège) >]
Nachtergaele, Philippe mailto [Open Engineering > > > >]
Paquay, Stéphane mailto [Open Engineering > > > >]
De Vincenzo, Pascal mailto [Open Engineering > > > >]
2011
SPIE, Optical Systems Design (Marseille 5-8 septembre 2011)
No
International
SPIE Conference on Optical System Design
September 2011
Marseille
France
[en] OOFELIE ; Multiphysics ; lens ; YAG laser rod ; Thermo-elastic ; interferometer ; birefringence ; polarization
[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.
http://hdl.handle.net/2268/101518

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