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The Immersed Echelle - I Basic Properties

Szumski, R. and Walker, D.D. (1999) The Immersed Echelle - I Basic Properties. Monthly Notices of the Royal Astronomical Society, 302. pp. 139-144. ISSN 0035-8711

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High-resolution spectrographs for very large telescopes lead to new challenges in grating technology to achieve optimum matching of the slit width to the seeing disc. This has led elsewhere to the development of long echelles of high blaze angle produced by mosaicking technology. An alternative approach, pursued in this paper and adopted for the Gemini High-Resolution Optical Spectrograph, is to immerse a monolithic echelle in a medium of refractive index greater than unity. This paper explores the consequences of this. It will be followed by Paper II, which will report on a major technology development programme in progress.

Item Type: Article
Schools: School of Computing and Engineering
School of Computing and Engineering > Centre for Precision Technologies
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Depositing User: Catherine Parker
Date Deposited: 01 Dec 2016 13:36
Last Modified: 28 Aug 2021 12:11


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