Echelle spectrographs for 8-m class telescopes

David D. Walker; Richard G. Bingham; Francisco Diego

doi:10.1117/12.19117

1 July 1990 Echelle spectrographs for 8-m class telescopes

David D. Walker, Richard G. Bingham, Francisco Diego

Proceedings Volume 1235, Instrumentation in Astronomy VII; (1990) https://doi.org/10.1117/12.19117
Event: SPIE Astronomical Telescopes and Instrumentation for the 21st Century, 1990, Tucson, AZ, United States

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).

Citation Download Citation

David D. Walker, Richard G. Bingham, and Francisco Diego "Echelle spectrographs for 8-m class telescopes", Proc. SPIE 1235, Instrumentation in Astronomy VII, (1 July 1990); https://doi.org/10.1117/12.19117

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