Houghton anastigmatic telescope containing aspheric mirrors that allows corrector position as a free parameter

摘要

A family of catadioptric telescopes is investigated, characterized with two-element, full-aperture, afocal corrector lenses and aspherical, focusing, primary mirrors or primary-secondary mirror combinations. Third-order aberration and design equations are provided for anastigmatic systems in which corrector position must be a free parameter, forcing the consideration of aspherics on the mirrored surfaces.