MOSAIC optical relay module: optical design, performance, and flexure analysis

Ariadna Calcines; Marc Dubbeldam; Timothy J. Morris; Ewan Fitzsimons; Hermine Schnetler; Mathieu Cohen; Jean-Philippe Amans

doi:10.1117/12.2313481

11 July 2018 MOSAIC optical relay module: optical design, performance, and flexure analysis

Ariadna Calcines, Marc Dubbeldam, Timothy J. Morris, Ewan Fitzsimons, Hermine Schnetler, Mathieu Cohen, Jean-Philippe Amans

Author Affiliations +

Proceedings Volume 10702, Ground-based and Airborne Instrumentation for Astronomy VII; 107029P (2018) https://doi.org/10.1117/12.2313481
Event: SPIE Astronomical Telescopes + Instrumentation, 2018, Austin, Texas, United States

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.

Citation Download Citation

Ariadna Calcines, Marc Dubbeldam, Timothy J. Morris, Ewan Fitzsimons, Hermine Schnetler, Mathieu Cohen, and Jean-Philippe Amans "MOSAIC optical relay module: optical design, performance, and flexure analysis", Proc. SPIE 10702, Ground-based and Airborne Instrumentation for Astronomy VII, 107029P (11 July 2018); https://doi.org/10.1117/12.2313481

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