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Proceedings Paper

DARWIN fringe sensor: experimental results on the BRISE bench
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Paper Abstract

Interferometer performances are linked to the measurement and the correction of telescope aberrations. For cophasing the large number of beams required by the DARWIN mission with the specified requirements (realtime piston/tip/tilt correction and measurement of higher orders up to spherical aberration), focal-plane approach has been selected due to its simple opto-mechanical device. Several focal-plane algorithms, developed at ONERA and gathered in the stand-alone MASTIC tool, were validated by experiment with a dedicated breadboard on the laboratory test bench BRISE. Our study shows the correct behaviour of the algorithms for linearity and repeatability; specific requirements are reached for piston/tip/tilt and higher order aberrations. These results confirm the validity of focal-plane sensors for the cophasing of multiple-aperture telescopes.

Paper Details

Date Published: 28 June 2006
PDF: 8 pages
Proc. SPIE 6268, Advances in Stellar Interferometry, 62682B (28 June 2006); doi: 10.1117/12.671705
Show Author Affiliations
Isabelle Mocœur, Ctr. National d'Etudes Spatiales (France)
Office National d'Etudes et de Recherches Aérospatiales (France)
Frédéric Cassaing, Office National d'Etudes et de Recherches Aérospatiales (France)
Fabien Baron, Cavendish Lab. (United Kingdom)
Laurent Mugnier, Office National d'Etudes et de Recherches Aérospatiales (France)
Stephan Hofer, Kayser-Threde GmbH (Germany)
Hans Thiele, Kayser-Threde GmbH (Germany)

Published in SPIE Proceedings Vol. 6268:
Advances in Stellar Interferometry
John D. Monnier; Markus Schöller; William C. Danchi, Editor(s)

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