Schmidt-Cassegrains

Schmidt-Cassegrains

Although there are many variations (both mirrors spherical, both mirrors aspherical or one of the two). Can they be divided into two main design forms: compact and non-compact.

In its compact form, the corrector plate is located on or near the focus of the primary mirror. In the non-compact, the corrector plate remains at or near the center of curvature (twice the focal length) of the primary mirror.