OPTICAL RADIATION SOURCE FOR PRODUCING A DIVERGENT RADIATION BEAM WITH A UNIFORM ANGULAR APERTURE

摘要

An optical source comprising a semiconductor laser having an emissive junction and optical means for the anamorphosis of the beam emitted by said laser. The optical means comprise a concave holographic diffraction grating. The location of the recording sources of said grating and of the semiconductor laser and their wavelength are such that said grating makes a stigmatic image of said laser with a good aplanetism. The angle of diffraction is selected so as to reduce the non-isotropy of the beam emitted by the semi-conductor laser.