MAVIS: an optical design for the image slicer and spectrograph

Will Saunders; Tim Chin; Chris Schwab; Simon Ellis; Robert Content; Jacob Pember; Ross Zhelem; Jessica Zheng; Scott Smedley; David Robertson; Davide Greggio; Francois Rigaut; Richard M. Mcdermid

doi:10.1117/12.2630348

29 August 2022 MAVIS: an optical design for the image slicer and spectrograph

Will Saunders, Tim Chin, Chris Schwab, Simon Ellis, Robert Content, Jacob Pember, Ross Zhelem, Jessica Zheng, Scott Smedley, David Robertson, Davide Greggio, Francois Rigaut, Richard M. Mcdermid

Author Affiliations +

Proceedings Volume 12184, Ground-based and Airborne Instrumentation for Astronomy IX; 1218444 (2022) https://doi.org/10.1117/12.2630348
Event: SPIE Astronomical Telescopes + Instrumentation, 2022, Montréal, Québec, Canada

Conference Poster

Abstract

The proposed MAVIS instrument for the VLT UT4 delivers a 30" x 30" MCAO-corrected field for 370-950nm. It includes an integral-field spectroscopic mode, whereby a subsection of the field is delivered to an image slicer and spectrograph, with either 25mas or 50mas spatial sampling, and R<4000 and R<10000 modes in either the red or the blue. Three designs are being considered for the image slicer, two with all-reflective optics, and the other, presented here, derived from the existing WiFeS spectrograph and including arrays of small lenses. A spectrograph design is also presented, challenging because of the need to be close to diffraction-limited across the entire wavelength range, while maintaining high throughput, in all 4 modes and over the entire 9cm x 9cm detector.

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Will Saunders, Tim Chin, Chris Schwab, Simon Ellis, Robert Content, Jacob Pember, Ross Zhelem, Jessica Zheng, Scott Smedley, David Robertson, Davide Greggio, Francois Rigaut, and Richard M. Mcdermid "MAVIS: an optical design for the image slicer and spectrograph", Proc. SPIE 12184, Ground-based and Airborne Instrumentation for Astronomy IX, 1218444 (29 August 2022); https://doi.org/10.1117/12.2630348

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