High speed infrared transmitter/receiver has laser, detector for detecting laser beams and producing electrical signal(s), optical diffraction element for directing beams to detector

摘要

The device has a laser (20) for providing several beams of electromagnetic energy, a detector (18) arranged to detect the laser beams and to produce at least one electrical signal in response to this and an optical diffraction element (30) for directing the beams from the laser to a detector. The optical diffraction element consists of a substrate of a high temperature film with a superimposed structure. Independent claims are also included for the following: a transmitter.