The performance of the calibration module for SPHERE

François P. Wildi; Bernard Michaud; Michel Crausaz; Rene Dubosson; David Mouillet; Kjetil Dohlen; Hans-Martin Schmid; Jean-Luc Beuzit

doi:10.1117/12.857949

15 July 2010 The performance of the calibration module for SPHERE

François P. Wildi, Bernard Michaud, Michel Crausaz, Rene Dubosson, David Mouillet, Kjetil Dohlen, Hans-Martin Schmid, Jean-Luc Beuzit

Author Affiliations +

Proceedings Volume 7735, Ground-based and Airborne Instrumentation for Astronomy III; 77352V (2010) https://doi.org/10.1117/12.857949
Event: SPIE Astronomical Telescopes + Instrumentation, 2010, San Diego, California, United States

Abstract

One of the main challenges to obtain the contrast of >15mag targeted by the extra-solar planet imager SPHERE lies in the calibration of all the different elements participating in the final performance. The Adaptive Optics (AO) system and its three embedded loops, the coronagraphs, the Near Infrared (NIR) dual band imager, the NIR integral field spectrograph, the NIR spectrograph, the visible high accuracy polarimeter and the visible imager all require sophisticated calibration. The calibration process relies on a specific complex calibration module that provides the different sources across the spectrum (500-2320nm) with the stabilities and precisions required and positions them when the need to be. This calibration module has just passed all verification tests and its performance is now well characterized. Its design and performance is the object of this article.

Citation Download Citation

François P. Wildi, Bernard Michaud, Michel Crausaz, Rene Dubosson, David Mouillet, Kjetil Dohlen, Hans-Martin Schmid, and Jean-Luc Beuzit "The performance of the calibration module for SPHERE", Proc. SPIE 7735, Ground-based and Airborne Instrumentation for Astronomy III, 77352V (15 July 2010); https://doi.org/10.1117/12.857949

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