Experimental validation of opto-thermo-elastic modeling in OOFELIE Multiphysics

Mazzoli, Alexandra; Saint-Georges, Philippe; Orban, Anne; Ruess, Jean-Sébastien; Loicq, Jerôme; Barbier, Christian; Stockman, Yvan; Georges, Marc; Nachtergaele, Philippe; Paquay, Stéphane; De Vincenzo, Pascal

Reference : Experimental validation of opto-thermo-elastic modeling in OOFELIE Multiphysics


	Document type :	Scientific congresses and symposiums : Paper published in a book
	Discipline(s) :	Physical, chemical, mathematical & earth Sciences : Physics
	To cite this reference:	http://hdl.handle.net/2268/101518

Title :	Experimental validation of opto-thermo-elastic modeling in OOFELIE Multiphysics
Language :	English
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 > > > >]
Publication date :	2011
Main document title :	SPIE, Optical Systems Design (Marseille 5-8 septembre 2011)
Peer reviewed :	No
Audience :	International
Event name :	SPIE Conference on Optical System Design
Event date :	September 2011
Event place (city) :	Marseille
Event country :	France
Keywords :	[en] 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.
Permalink :	http://hdl.handle.net/2268/101518

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