Ganas: a hybrid anastigmatic aspherical prime-focus corrector

Details Ganas: a hybrid anastigmatic aspherical prime-focus corrector Ganas: a hybrid anastigmatic aspherical prime-focus corrector

May 2009

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2009rmxac..35..259d&link_type=abstract

XII Latin American IAU Regional Meeting (Eds. G. Magris, G. Bruzual, & L. Carigi) Revista Mexicana de Astronomía y Astrofísica (

Astronomy and Astrophysics

Astronomy

Instrumentation

Scientific paper

The Cassegrain-Coudé 1 meter Carl Zeiss telescope at the Venezuelan National Astronomical Observatory uses six optical elements. Removal of the secondary convex mirror gives access to the focal plane of the primary f/5 spheroidal mirror, but spherical aberration, coma, astigmatism and field curvature severely hamper its imaging capabilities. In order to carry out prime-focus imaging, we designed and manufactured a corrector group, called GAnAs, to minimize these aberrations over a circular field of 30 arcmin. The corrector group is a hybrid configuration with two thin aspherical 4th-order plates and a meniscus lens.

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