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Imaging with a Coherence Interferometer in Optical Astronomy

Published online by Cambridge University Press:  12 April 2016

C. Roddier  and
F. Roddier
C. Roddier
Affiliation:
Département d’Astrophysique de l’I.M.S.P., Equipe de recherche associée au C.N.R.S., Université de Nice, Parc Valrose 06034 NICE CEDEX – FRANCE
F. Roddier
Affiliation:
Département d’Astrophysique de l’I.M.S.P., Equipe de recherche associée au C.N.R.S., Université de Nice, Parc Valrose 06034 NICE CEDEX – FRANCE

Extract

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In optical astronomy, images are highly degraded by atmospheric turbulence. The diameter of the seeing disk may vary from 0.2 arcseconds to 10 arcseconds or more according to weather conditions. A typical diameter is of the order of 2 arcseconds which is the angular resolution of a 6cm lens at the diffraction limit.

Large telescopes have been built for their light collecting capabilities, not for their resolving power which is, in general, of the order of 0.2 arcseconds, that is far from the diffraction limit.

Type
Part IV: Optical Interferometric Methods
Information
International Astronomical Union Colloquium , Volume 49: Image Formation from Coherence Functions in Astronomy , 1979 , pp. 175 - 185
Copyright
Copyright © Reidel 1979

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