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MOSAIC optical relay module: optical design, performance, and flexure analysis
Author(s): Ariadna Calcines; Marc Dubbeldam; Timothy J. Morris; Ewan Fitzsimons; Hermine Schnetler; Mathieu Cohen; Jean-Philippe Amans
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Paper Abstract

The Optical Relay Module of the MOSAIC multiple-object spectrograph is used to relay 400-1800nm light picked off from the ELT focal plane to either a fibre-based integral field unit or a natural guide star wavefront sensor. Here we present the preliminary optical design offering a telecentric exit beam with a focal-ratio of F/17.718 and the opto-mechanical analysis of flexures with a study of the impact in the optical layout performances such as: deviation of the PSF centroid, tip-tilt of the image focal plane, variations of the wavefront error, optical quality and pupil wandering at the deformable mirror position.

Paper Details

Date Published: 11 July 2018
PDF: 13 pages
Proc. SPIE 10702, Ground-based and Airborne Instrumentation for Astronomy VII, 107029P (11 July 2018); doi: 10.1117/12.2313481
Show Author Affiliations
Ariadna Calcines, Durham Univ. (United Kingdom)
Marc Dubbeldam, Durham Univ. (United Kingdom)
Timothy J. Morris, Durham Univ. (United Kingdom)
Ewan Fitzsimons, UK Astronomy Technology Ctr. (United Kingdom)
Hermine Schnetler, UK Astronomy Technology Ctr. (United Kingdom)
Mathieu Cohen, Observatoire de Paris (France)
Jean-Philippe Amans, Observatoire de Paris (France)

Published in SPIE Proceedings Vol. 10702:
Ground-based and Airborne Instrumentation for Astronomy VII
Christopher J. Evans; Luc Simard; Hideki Takami, Editor(s)

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