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

Calcines, Ariadna; Dubbeldam, Marc; Morris, Timothy J.; Fitzsimons, Ewan; Schnetler, Hermine; Cohen, Mathieu; Amans, Jean-Philippe; Evans, Christopher J.; Simard, Luc; Takami, Hideki

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

Calcines, A., Dubbeldam, M., Morris, T. J., Fitzsimons, E., Schnetler, H., Cohen, M., …Takami, H. (2018). MOSAIC optical relay module: optical design, performance, and flexure analysis. In Proceedings Volume 10702, Ground-based and Airborne Instrumentation for Astronomy VII. https://doi.org/10.1117/12.2313481

• Conference Name: Ground-based and Airborne Instrumentation for Astronomy VII, SPIE Astronomical Telescopes + Instrumentation 2018
• Conference Location: Austin, Texas
• Online Publication Date: Jul 11, 2018
• Publication Date: 2018
• Deposit Date: Sep 25, 2018
• Publicly Available Date: Jan 17, 2023
• Publisher: SPIE
• Volume: 10702
• Book Title: Proceedings Volume 10702, Ground-based and Airborne Instrumentation for Astronomy VII
• ISBN: 9781510619579
• DOI: https://doi.org/10.1117/12.2313481
• Public URL: https://durham-repository.worktribe.com/output/1145532