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Proceedings Paper

Echelle spectrographs for 8-m class telescopes
Author(s): David D. Walker; Richard G. Bingham; Francisco Diego
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Paper Abstract

The modifications required to construct an echelle spectrograph similar to the UCLES (currently in use on the 3.9-m AAT and described by Walker et al., 1986) for an 8-m-class telescope are discussed in detail and illustrated with diagrams. The design and operational parameters of the UCLES are reviewed, and a direct factor-of-two linear scaling of the UCLES for an 8-m telescope is outlined, with particular attention to a mosaicked CCD detector array and echelle configuration, the relationship between the field rotation problem and the telescope secondary focus ratio, the feasibility of a Littrow layout with prisms in double pass immediately ahead of the echelle, prism mosaics as a low-cost approach to prismatic cross-dispersion, the characteristics and application of the 79 g/mm R4 echelle, and the possible use of white-light pupil imaging, as proposed by Baranne (1972).

Paper Details

Date Published: 1 July 1990
PDF: 15 pages
Proc. SPIE 1235, Instrumentation in Astronomy VII, (1 July 1990); doi: 10.1117/12.19117
Show Author Affiliations
David D. Walker, Univ. College London (United Kingdom)
Richard G. Bingham, Univ. College London and Royal Greenwich Observatory (United Kingdom)
Francisco Diego, Univ. College London (United Kingdom)

Published in SPIE Proceedings Vol. 1235:
Instrumentation in Astronomy VII
David L. Crawford, Editor(s)

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