RESEAU DE DIFFRACTION FOCALISANT DE TRES GRANDE EFFICACITE ET PROCEDE DE FABRICATION DE CE RESEAU

摘要

The invention concerns a high-efficiency focusing diffraction network and method for manufacturing this network. This network comprises projections (12) forming successive arcs the step ( LAMBDA ) of which decreases gradually from one side to the other of the element (11) bearing these projections and is obtained by forming a hologram capable of focusing the radiation to be focused with the network and by inscribing the interference figure contained in the hologram on one surface of the element. The invention is useful for focusing and collimating laser beams with intense flux or for modifying the wave front of laser beams.