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Performance of spatial filtering wavefront sensor for the phasing of segmented telescopes
Author(s): A. Cheffot; L. Noethe; K. Dohlen; A. Vigan; E. Hugot; S. Lévêque ; J.-F. Sauvage
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Paper Abstract

The next generation of extremely large telescopes requires the use of segmented mirrors. This technology needs specific wave front sensors to measure the alignment and phasing state. This paper compares two specific technologies for the measurement of wavefront steps between segments: a simple pin hole and a phase contrast sensor. The efficiency of each sensor will be quantified by calculating the Fisher information, first, under ideal conditions, then including the effects of sampling and atmospheric turbulence.

Paper Details

Date Published: 6 July 2018
PDF: 11 pages
Proc. SPIE 10700, Ground-based and Airborne Telescopes VII, 1070062 (6 July 2018); doi: 10.1117/12.2311659
Show Author Affiliations
A. Cheffot, European Southern Observatory (Germany)
Aix Marseille Univ., CNRS, CNES, LAM (France)
L. Noethe, European Southern Observatory (Germany)
K. Dohlen, Aix Marseille Univ., CNRS, CNES, LAM (France)
A. Vigan, Aix Marseille Univ., CNRS, CNES, LAM (France)
E. Hugot, Aix Marseille Univ., CNRS, CNES, LAM (France)
S. Lévêque , European Southern Observatory (Germany)
J.-F. Sauvage, Aix Marseille Univ., CNRS, CNES, LAM (France)

Published in SPIE Proceedings Vol. 10700:
Ground-based and Airborne Telescopes VII
Heather K. Marshall; Jason Spyromilio; Roberto Gilmozzi, Editor(s)

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