A high-efficiency low-resolution spectrograph design for SALT

Janus D. Brink; Ockert J. Strydom; Magaretha L. Pretorius; Petri S. M. Vaisanen

doi:10.1117/12.2313130

10 July 2018 A high-efficiency low-resolution spectrograph design for SALT

Janus D. Brink, Ockert J. Strydom, Magaretha L. Pretorius, Petri S. M. Vaisanen

Proceedings Volume 10706, Advances in Optical and Mechanical Technologies for Telescopes and Instrumentation III; 107066H (2018) https://doi.org/10.1117/12.2313130
Event: SPIE Astronomical Telescopes + Instrumentation, 2018, Austin, Texas, United States

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.

Citation Download Citation

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); https://doi.org/10.1117/12.2313130

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