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Proceedings Paper

Reexamination of high-resolution spectrographs for large telescopes: the Cassegrain solution
Author(s): David D. Walker; Alan Stuart Radley; Francisco Diego; Andrew Charalambous; Mark Dryburgh; Bruce C. Bigelow
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Paper Abstract

We define the stability requirements for a high-resolution spectrograph, then show how these can be met at Cassegrain by modern materials, mechanism design, thermal control, and passive and active compensation for structural flexure. We consider the optimization of the information throughput of the spectrograph, in terms of slit-throughput, with the superb imaging performance of modern large telescopes and sites, new developments in image slicers, the prospects for adaptive-optics feeds for spectrographs, and the internal transmission of the optics. We consider in detail the requirements of, and solutions for, high resolution spectrographs for two large telescope projects - the 6.5 m MMT conversion and the two Gemini 8 m telescopes.

Paper Details

Date Published: 1 June 1994
PDF: 13 pages
Proc. SPIE 2198, Instrumentation in Astronomy VIII, (1 June 1994); doi: 10.1117/12.176800
Show Author Affiliations
David D. Walker, Univ. College London (United Kingdom)
Alan Stuart Radley, Univ. College London (United Kingdom)
Francisco Diego, Univ. College London (United Kingdom)
Andrew Charalambous, Univ. College London (United Kingdom)
Mark Dryburgh, Univ. College London (United Kingdom)
Bruce C. Bigelow, Univ. College London (United States)


Published in SPIE Proceedings Vol. 2198:
Instrumentation in Astronomy VIII
David L. Crawford; Eric R. Craine, Editor(s)

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