A corner reflector is a
retroreflector consisting of three mutually perpendicular, intersecting flat surfaces, which reflects
electromagnetic waves back towards the source. The three intersecting surfaces often have square shapes. This is also known as a corner cube.Such devices are often used as
radar targets or markers and are often employed on
ships and, especially,
lifeboats. These normally consist of three conducting metallic surfaces or screens perpendicular to one another. In
optics, corner reflectors typically consist of three
mirrors or reflective
prisms which return an incident
light beam in the opposite direction. Arrays of such retroreflectors are used in
bicycle reflectors,
automobile tail lights and as targets for
laser range finding. Microscopic corner reflector structures can be incorporated into reflective paint for increased visibility at night, although
retroreflective spherical beads are more common for this purpose.
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