1. A reflector consisting of three mutually perpendicular intersecting conducting flat surfaces, which returns a reflected electromagnetic wave to its point of origin. The three intersecting surfaces usually have square shapes.
One such device, normally consisting of three metallic surfaces or screens perpendicular to one another, is designed to act as a radar target or marker. Another such device uses passive optical mirrors which returns an incident lightbeam 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.
2. A directional antenna using two mutually intersecting conducting flat surfaces.
3. In radar interpretation, an object that, by means of multiple reflections from smooth surfaces, produces a radar return of greater magnitude than might be expected from the physical size of the object.
Radar detects targets in a manner similar to the way we see things when using a flashlight in total darkness, when the only objects we can see are those illuminated by the flashlight's beam.
Radar Detectors similar in function to those commonly used in cars to announce the presence of speed control radar are available for use on boats.
Various forms of radarreflectors are available, ranging from seemingly simple corner reflectors made of three intersecting sheets of radar reflective material to complex reflector geometry's using varying forms of corner reflector or a Luneburg lens.
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