A corner reflector is a retroreflector consisting of three mutually perpendicular, intersecting flat surfaces, which reflects waves back directly towards the source, but shifted (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.
The term is also used for a corner reflector antenna, consisting of two flat metal surfaces at a right angle, with a dipole antenna in front of them.
... Corner reflectors can also occur accidentally ... Tower blocks with balconies are often accidental corner reflectors for sound and return a distinctive echo to an observer making a sharp noise, such as a hand clap, nearby ...
... A set of three mutually perpendicular reflective surfaces, placed to form the corner of a cube, work as a retroreflector ... The three corresponding normal vectors of the corner's sides form a basis (x, y, z) in which to represent the direction of an arbitrary incoming ray ... the ray direction goes from to to to and it leaves the corner with all three components of motions exactly reversed ...
Famous quotes containing the word corner:
“A man who sees another man on the street corner with only a stump for an arm will be so shocked the first time hell give him sixpence. But the second time itll only be a threepenny bit. And if he sees him a third time, hell have him cold-bloodedly handed over to the police.”
—Bertolt Brecht (18981956)