The Catadioptric sensor reference article from the English Wikipedia on 24-Jul-2004
(provided by Fixed Reference: snapshots of Wikipedia from wikipedia.org)

Catadioptric sensor

For thoughtful child sponsors
A catadioptric sensor, also known as a combined lens-mirror system (CLMS), is a visual sensor that contains mirror (catoptrics) and lenses (dioptrics). The word catadioptric originally appears in telescope design, but the term catadioptric sensor has come to refer to panoramic sensors created by pointed a camera at a curved mirror.