Reference : Deformation measurements by ESPI of the surface of a heated mirror and comparison wit...
Scientific congresses and symposiums : Paper published in a journal
Physical, chemical, mathematical & earth Sciences : Physics
http://hdl.handle.net/2268/213719
Deformation measurements by ESPI of the surface of a heated mirror and comparison with numerical model
English
Languy, Fabian mailto [Université de Liège > > CSL (Centre Spatial de Liège) >]
Vandenrijt, Jean-François mailto [Université de Liège > > CSL (Centre Spatial de Liège) >]
Saint-Georges, Philippe mailto [> >]
Georges, Marc mailto [Université de Liège > > CSL (Centre Spatial de Liège) >]
26-Jun-2017
Proceedings of SPIE: The International Society for Optical Engineering
International Society for Optical Engineering
103291M
Proceedings Volume 10329, Optical Measurement Systems for Industrial Inspection X;
No
No
International
0277-786X
1996-756X
Bellingham
WA
SPIE Optical Metrology
du 26 juin au 29 juin 2017
SPIE
Munich
Germany
[en] speckle ; ESPI
[en] The manufacture of mirrors for space application is expensive and the requirements on the optical performance increase over years. To achieve higher performance, larger mirrors are manufactured but the larger the mirror the higher the sensitivity to temperature variation and therefore the higher the degradation of optical performances. To avoid the use of an expensive thermal regulation, we need to develop tools able to predict how optics behaves with thermal constraints. This paper presents the comparison between experimental surface mirror deformation and theoretical results from a multiphysics model. The local displacements of the mirror surface have been measured with the use of electronic speckle pattern interferometry (ESPI) and the deformation itself has been calculated by subtracting the rigid body motion. After validation of the mechanical model, experimental and numerical wave front errors are compared.
Centre Spatial de Liège - CSL
Service public de Wallonie : Direction générale opérationnelle de l'économie, de l'emploi et de la recherche - DG06
Socoev
Researchers ; Professionals
http://hdl.handle.net/2268/213719
10.1117/12.2270258
https://www.spiedigitallibrary.org/conference-proceedings-of-spie/10329/1/Deformation-measurements-by-ESPI-of-the-surface-of-a-heated/10.1117/12.2270258.short?SSO=1

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