DARWIN fringe sensor: experimental results on the BRISE bench

Isabelle Mocœur; Frédéric Cassaing; Fabien Baron; Laurent Mugnier; Stephan Hofer; Hans Thiele

doi:10.1117/12.671705

28 June 2006 DARWIN fringe sensor: experimental results on the BRISE bench

Isabelle Mocœur, Frédéric Cassaing, Fabien Baron, Laurent Mugnier, Stephan Hofer, Hans Thiele

Proceedings Volume 6268, Advances in Stellar Interferometry; 62682B (2006) https://doi.org/10.1117/12.671705
Event: SPIE Astronomical Telescopes + Instrumentation, 2006, Orlando, Florida , United States

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.

Citation Download Citation

Isabelle Mocœur, Frédéric Cassaing, Fabien Baron, Laurent Mugnier, Stephan Hofer, and Hans Thiele "DARWIN fringe sensor: experimental results on the BRISE bench", Proc. SPIE 6268, Advances in Stellar Interferometry, 62682B (28 June 2006); https://doi.org/10.1117/12.671705

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