Corner cube is a kind of interal surfaces anti-reflection prism. It can not be affected by the incidence and can reflect the incident light to 180 degree. That is to say, corner cube can reflect any incident light through CA and reflect them to their original direction. The precision can be represented by angle error of indident light and exit light, and is determined by the perpendicularity of three right angle surfaces.
Corner cube is widely used in the fileds of instruments and apparatus.
