Abstract: An information transfer system for transferring information to a fixed position from a moving object. The information system includes a light beam scanning along the route of the moving object. The light beam is linearly deflected. The moving object is provided with a modulation-reflection apparatus which receives the linearly-deflected light and changes a rotary angle at a polarization surface based upon information from the moving object itself such as object number, destination, or running speed. This modulates the incident light and reflects it back in the direction from which it came. The reflected light from the modulation-reflection apparatus is received through a light-sensitive detection device which allows the light to pass corresponding to the rotary angle of the polarization surface. Consequently, information regarding the moving object is discriminated.

Abstract: A follow-up guidance and information transfer system is disclosed for use between a control point and a moving object utilizing a laser beam generated at the control point. The incident beam is directed by a movable mirror toward the moving object and reflected therefrom by a corner cube or the like along the same path. A detector disposed in the passing zone detects direction and amplitude of deviations of the reflected beam from the path of the incident beam, and a mirror control responds to the detected signals to direct the path of the incident beam to follow the moving object.