Corner reflector
![Working principle of a corner reflector](/Images/godic/202501/06/Corner_reflector.svg1205.png")
![Comparison of the effect of corner (1) and spherical (2) retroreflectors on three light rays. Reflective surfaces are drawn in dark blue.](/Images/godic/202501/06/Comparison_of_retroreflectors.svg1205.png")
![(left) A radar corner reflector (diamond-shaped object) on the mast of a yacht. Note that this one is improperly deployed; to best reflect surface radar it should be deployed in the so-called](/Images/godic/202501/06/Radarreflektor_auf_einer_Motoryacht_35961205.JPG")
![](/Images/godic/202501/06/Buoy_seal1205.jpg")
A corner reflector is a retroreflector consisting of three mutually perpendicular, intersecting flat surfaces, which reflects waves back directly towards the source, but translated. The three intersecting surfaces often have square shapes. Radar corner reflectors made of metal are used to reflect radio waves from radar sets. Optical corner reflectors, called corner cubes, made of three-sided glass prisms, are used in surveying and laser rangefinding.