Editing Corner reflector (section)

{{short description|Retroreflector with three orthogonal, intersecting flat surfaces}}
{{distinguish|Corner reflector antenna}}
[[File:corner reflector.JPG|thumb|A corner reflector for radar testing]]
A '''corner reflector''' is a [[retroreflector]] consisting of three mutually [[perpendicular]], [[intersection (Euclidean geometry)|intersecting]] flat reflective surfaces.  It reflects [[wave]]s incident from any direction directly towards the source, but [[Translation (geometry)|translated]].   The three intersecting surfaces often are triangles (forming a [[Trirectangular tetrahedron|tetrahedron]]) or may have square shapes. Radar corner reflectors made of metal are used to reflect radio waves from [[radar]] sets. Optical corner reflectors, called '''corner cubes''' or '''cube corners''', made of three-sided glass [[Prism (optics)|prism]]s, are used in [[surveying]] and [[laser rangefinder|laser ranging]].