Fringe Tracker for the VLTI Spectro-Imager

Interferometry in the near IR aims at providing imaging resolution on the mas scale, and astrometry at the few μas level, from ground based infrastructures using current telescope technology. To take advantage of simultaneous combination of four to eight telescopes, an international consortium is pr...

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Bibliographic Details
Published in:Proceedings of the International Astronomical Union 2007-10, Vol.3 (S248), p.106-107
Main Authors: Gai, M., Buscher, D. F., Corcione, L., Ligori, S., Young, J. S.
Format: Article
Language:English
Subjects:
Astronomy
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Summary:Interferometry in the near IR aims at providing imaging resolution on the mas scale, and astrometry at the few μas level, from ground based infrastructures using current telescope technology. To take advantage of simultaneous combination of four to eight telescopes, an international consortium is proposing to ESO the development of the VLTI Spectro-Imager. One of the key sub-systems, to measure and correct the atmospheric perturbations relative to the beam phase, is the fringe tracker, aimed at providing the science combiner with long, stable observing conditions. The fringe tracker function in interferometer is equivalent to adaptive optics for conventional telescopes. The fringe tracker concept under study, using minimum redundancy combination and bulk optics, is described.
ISSN:1743-9213
1743-9221
DOI:10.1017/S1743921308018759