Abstract
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.
