Français : Reflecteur Cassegrain parabole / Pleumeur-Bodou / France
English: Closeup of the convex secondary reflector of a large Cassegrain satellite communication antenna in Pleumeur-Bodou, France. It is suspended in front of the main parabolic dish reflector, at the focus. During transmission, the radio waves emerge from a horn at the center of the dish, reflect off this subreflector back to the main dish, which reflects them forward to form the outgoing beam.