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Proceedings Paper

Optical design of the FUEGOS high-resolution multiple fiber spectrograph
Author(s): Martin Casse; Jacques Baudrand; Jean-Pierre Lemonnier
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Paper Abstract

This paper describes the feasibility design of a high resolution multiple object fiber spectrograph. High resolution is obtained without cross dispersion with large 305 mm ruled length gratings and the use of the fiber link as an image slicer. The grating has a high groove density to provide a free spectral range larger than the CCD detector. The use of microlenses as focal converter at the slit has several implications on the design of the spectrograph. Unlike single object spectrographs, the presence of a significant telecentric slit field, 6 degrees long, makes the standard parabolic collimator inappropriate. A catadioptric collimator is used instead in double pass to image the intermediary spectrum sideways of the slit. The use of the white pupil and the good image quality of the collimator permit various camera options. The one foreseen is a f/1.25 finite conjugate catadioptric camera with a (2048)224 micrometers pixel detector.

Paper Details

Date Published: 1 June 1994
PDF: 11 pages
Proc. SPIE 2198, Instrumentation in Astronomy VIII, (1 June 1994); doi: 10.1117/12.176798
Show Author Affiliations
Martin Casse, Observatoire de Paris-Meudon (Germany)
Jacques Baudrand, Observatoire de Paris-Meudon (France)
Jean-Pierre Lemonnier, Observatoire de Paris-Meudon (France)

Published in SPIE Proceedings Vol. 2198:
Instrumentation in Astronomy VIII
David L. Crawford; Eric R. Craine, Editor(s)

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