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Proceedings Paper

Optical and mechanical design of a straylight rejection baffle for CoRoT
Author(s): Jean-Yves Plesseria; Emmanuel Mazy; Jean-Marc Defise; Pierre Rochus; Els Lemmens; Davy Vrancken
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Paper Abstract

The COROT mission is part of the program "Petites Missions" of CNES (French space agency). It implies international cooperation between France, Belgium, Germany, Austria, Spain and the European Space Agency (ESA). COROT aims to perform astroseismology measurements and to detect exoplanets. Long duration observations of stars will be used to detect periodic variations with an afocal telescope followed by a dioptric objective and 4 CCDs. Due to the orbit of the spacecraft (low altitude polar orbit) and even if the observation are performed in a direction perpendicular to orbit plane, the measurements can be disturbed by the straylight reflected on the earth (albedo) that can generate periodic perturbation. CSL is in charge of the design and procurement, with the help of Belgian industries, of a baffle and its protective cover that will be mounted on top of the afocal entrance telescope. The requirements are very stringent from the optical point of view as well as from the mechanical point of view. The rejection of the baffle must be of the order of 1013 for field angles above 20 degrees while the allocated mass is 19 kilograms.

Paper Details

Date Published: 19 November 2003
PDF: 10 pages
Proc. SPIE 5170, Techniques and Instrumentation for Detection of Exoplanets, (19 November 2003); doi: 10.1117/12.506726
Show Author Affiliations
Jean-Yves Plesseria, Ctr. Spatial de Liege (Belgium)
Emmanuel Mazy, Ctr. Spatial de Liege (Belgium)
Jean-Marc Defise, Ctr. Spatial de Liege (Belgium)
Pierre Rochus, Ctr. Spatial de Liege (Belgium)
Els Lemmens, Verhaert Design and Development (Belgium)
Davy Vrancken, Verhaert Design and Development (Belgium)

Published in SPIE Proceedings Vol. 5170:
Techniques and Instrumentation for Detection of Exoplanets
Daniel R. Coulter, Editor(s)

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