High Resolution Echelle Spectrographs For The Ang Lo-Australian Telescope Coude Focus And William Herschel Telescope Nasmyth Focus

D. D. Walker; F. Diego; A. Charalarnbous; C. J. Hirst; A. C. Fish

doi:10.1117/12.968103

13 October 1986 High Resolution Echelle Spectrographs For The Ang Lo-Australian Telescope Coude Focus And William Herschel Telescope Nasmyth Focus

D. D. Walker, F. Diego, A. Charalarnbous, C. J. Hirst, A. C. Fish

Author Affiliations +

Proceedings Volume 0627, Instrumentation in Astronomy VI; (1986) https://doi.org/10.1117/12.968103
Event: 1986 Astronomy Conferences, 1986, Tucson, United States

Abstract

The echelle spectrographs for the Anglo-Australian Telescope (AAT) and for the William Herschel Telescope (WHT) are being developed following the same basic design, which in many respects, differs from previous echelle instruments. The purpose of this paper is to document some of the more innovative concepts for the benefit of future designers and prospective observers. The instruments were originally conceived around the idea of matching the spectrum format to the features of a particular detector - the University College London Image Photon Counting System (UCL-IPCS). Since construction started, very large CCD's have appeared on the horizon and this has called for certain modifications which are also discussed. Attention is drawn to various tactics for maximising throughput, including the new concept of a variable beam size. The arguments in favor of very large fused silica prisms for cross dispersion are summarised. The echellogram will be displaced in both dispersion directions on the detector and the method of accomplishing this is outlined. A novel automatic check of collimation is also described, together with an overview of important spectrograph functions such as those in the pre-slit area.

Citation Download Citation

D. D. Walker, F. Diego, A. Charalarnbous, C. J. Hirst, and A. C. Fish "High Resolution Echelle Spectrographs For The Ang Lo-Australian Telescope Coude Focus And William Herschel Telescope Nasmyth Focus", Proc. SPIE 0627, Instrumentation in Astronomy VI, (13 October 1986); https://doi.org/10.1117/12.968103

ACCESS THE FULL ARTICLE

INSTITUTIONAL
Select your institution to access the SPIE Digital Library.

SELECT YOUR INSTITUTION

PERSONAL
Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.

PERSONAL SIGN IN

No SPIE Account? Create one

PURCHASE THIS CONTENT

SUBSCRIBE TO DIGITAL LIBRARY

50 downloads per 1-year subscription

Members: $195

Non-members: $335 ADD TO CART

25 downloads per 1 - year subscription

Members: $145

Non-members: $250 ADD TO CART

PURCHASE SINGLE ARTICLE

Includes PDF, HTML & Video, when available