Reexamination of high-resolution spectrographs for large telescopes: the Cassegrain solution

David D. Walker; Alan Stuart Radley; Francisco Diego; Andrew Charalambous; Mark Dryburgh; Bruce C. Bigelow

doi:10.1117/12.176800

1 June 1994 Reexamination of high-resolution spectrographs for large telescopes: the Cassegrain solution

David D. Walker, Alan Stuart Radley, Francisco Diego, Andrew Charalambous, Mark Dryburgh, Bruce C. Bigelow

Proceedings Volume 2198, Instrumentation in Astronomy VIII; (1994) https://doi.org/10.1117/12.176800
Event: 1994 Symposium on Astronomical Telescopes and Instrumentation for the 21st Century, 1994, Kailua, Kona, HI, United States

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.

Citation Download Citation

David D. Walker, Alan Stuart Radley, Francisco Diego, Andrew Charalambous, Mark Dryburgh, and Bruce C. Bigelow "Reexamination of high-resolution spectrographs for large telescopes: the Cassegrain solution", Proc. SPIE 2198, Instrumentation in Astronomy VIII, (1 June 1994); https://doi.org/10.1117/12.176800

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