Reference : Focii determination of an off axis ellipsoid : Theory to practice
Scientific congresses and symposiums : Paper published in a book
Engineering, computing & technology : Aerospace & aeronautics engineering
http://hdl.handle.net/2268/82059
Focii determination of an off axis ellipsoid : Theory to practice
English
Houbrechts, Yvette mailto [Université de Liège - ULg > > CSL (Centre Spatial de Liège) >]
Roose, Stéphane mailto [Université de Liège - ULg > > CSL (Centre Spatial de Liège) >]
Stockman, Yvan mailto [Université de Liège - ULg > > CSL (Centre Spatial de Liège) >]
2-Aug-2004
Proceedings of the Eighth International Conference on Laser and Laser Information Technologies
[en] Interferometry XII: Applications
Osten, W.
Novak, E.
SPIE
Proc. SPIE 5532
No
No
International
9780819454706
Bellingham
USA
Eighth International Conference on Laser and Laser Information Technologies
August 2004
SPIE
Denver
USA
[en] Optical metrology ; Geometrical optics ; Interferometry
[en] In the frame of cryogenic test on an off axis ellipsoid, it has been required to set-up an unambiguous method to determine and track the foci position during temperature transitions. This procedure was mandatory to avoid: (1) impact of the operator skills working on triple shift scheme to assure continuously monitoring of the ellipsoid shape during cool down. (2) correctly dissociate the impact of the thermal deformation on the mirror shape with respect to alignment errors. This paper will demonstrate the process, starting from ideal ellipsoid shape, then introducing 3D metrology data in a model, and finally presents the results in a practical situation.
Researchers
http://hdl.handle.net/2268/82059
10.1117/12.560734

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