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10 July 2018 A high-efficiency low-resolution spectrograph design for SALT
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Abstract
We present a concept low-resolution spectrograph design for the Southern African Large Telescope (SALT) based on the O’Donoghue-Clemens Spherical Transmission Grating Spectrometer (STGS) principle. The design delivers R ~ 700 between 380 nm and 760 nm with a peak total efficiency estimated at 45%. This instrument type remains largely invariant with telescope size and can fit into a very compact volume (650 mm × 650 mm × 400 mm). This can truly be a new technology which may transform future instrument design — especially when matched to extremely large telescopes.
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Janus D. Brink, Ockert J. Strydom, Magaretha L. Pretorius, and Petri S. M. Vaisanen "A high-efficiency low-resolution spectrograph design for SALT", Proc. SPIE 10706, Advances in Optical and Mechanical Technologies for Telescopes and Instrumentation III, 107066H (10 July 2018); doi: 10.1117/12.2313130; https://doi.org/10.1117/12.2313130
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