Astronomy and Astrophysics – Astronomy
Scientific paper
Jun 1994
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1994spie.2198.1071b&link_type=abstract
Proc. SPIE Vol. 2198, p. 1071-1082, Instrumentation in Astronomy VIII, David L. Crawford; Eric R. Craine; Eds.
Astronomy and Astrophysics
Astronomy
2
Scientific paper
'FUEGOS' (Fibre Unit for European General Optical Spectroscopy) is one of the foreseen focal instrument for the future European VLT (Very Large Telescope). It is a multi-object spectrograph widely opened to stellar and extra-galactic programs. In the general concept of this instrument, the fibre link feeding the spectrograph slit from the telescope Nasmyth focus plays a major part. In addition to transporting light with maximum efficiency it is also asked to satisfy a set of very different specifications related to the spectrograph characteristics or to the particular conditions met at the VLT Nasmyth focus. We examine here the engineering solutions that were ultimately adopted and present the first results obtained with a fibre link prototype which was integrated with the help of a dedicated home- made instrumentation. More generally through this presentation, it will be demonstrated that fibre cables coupled with microlenses at both extremities could provide a simple and efficient solution for high resolution fibre fed spectrographs when it is possible to make use of the advantageous plate scale factor of large aperture telescopes.
Baudrand Jacques
Casse Martin
Jocou Laurent
Lemonnier Jean-Pierre
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