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Proceedings Paper

A high-efficiency low-resolution spectrograph design for SALT
Author(s): Janus D. Brink; Ockert J. Strydom; Magaretha L. Pretorius; Petri S. M. Vaisanen
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Paper 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.

Paper Details

Date Published: 10 July 2018
PDF: 13 pages
Proc. SPIE 10706, Advances in Optical and Mechanical Technologies for Telescopes and Instrumentation III, 107066H (10 July 2018); doi: 10.1117/12.2313130
Show Author Affiliations
Janus D. Brink, South African Astronomical Observatory (South Africa)
Southern African Large Telescope (South Africa)
Ockert J. Strydom, South African Astronomical Observatory (South Africa)
Southern African Large Telescope (South Africa)
Magaretha L. Pretorius, South African Astronomical Observatory (South Africa)
Univ. of Cape Town (South Africa)
Petri S. M. Vaisanen, South African Astronomical Observatory (South Africa)
Southern African Large Telescope (South Africa)


Published in SPIE Proceedings Vol. 10706:
Advances in Optical and Mechanical Technologies for Telescopes and Instrumentation III
Ramón Navarro; Roland Geyl, Editor(s)

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