Corner Cube Prism, also known as Retroreflector or Trihedral Prism, consists of three perpendicular reflecting surfaces resembling the side walls of a cube. The input surface is positioned at a right angle to the diagonal of the cube. Regardless of the angle of incidence, the output beam runs parallel to its input counterpart but in an opposite direction. To ensure better matching among several corner prisms, their entrance-exit surface is often hexagonal-shaped. This phenomenon applies to this particular prism.
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