Patent ID: 7897961

Claim:
A reflex coupler, comprising: an organic light emitter arranged to emit a light signal; and an inorganic photodetector which comprises a detector area; wherein the light emitter and the detector area can be coupled optically as a result of radiation returned from an object onto which the light signal impinges, and the organic light emitter and the inorganic photodetector are integrated in one device; the reflex coupler includes further organic light emitters and/or further inorganic photodetectors; the further organic light emitters and/or the further inorganic photodetectors are arranged across an area or along a direction, and the inorganic photodetector and the further inorganic photodetectors are arranged so as to be able to independently detect reflections on the object or on further objects; and the inorganic photodetector and the further inorganic photodetectors are arranged in at least one direction; and the reflex coupler includes an evaluating unit which is arranged so that a relative movement of the object to several of the inorganic photodetector and the further inorganic photodetectors in the at least one direction can be determined and a velocity of the object can be determined from a pulse frequency of an output signal.