Photoionic microhead device for the treatment of a material surface by powder deposition

摘要

The invention relates to a device for the treatment for the surface of a material by depositing a material in powder form comprising: at least one optical fibre (2), a light source (4) able to produce a pulsed light, means (6) for injecting light into a first end of the optical fibre, a miniaturized photoionic head (8) fixed to a second end of the optical fibre and ensuring the diffusion of the light propagated by the optical fibre towards the material to be deposited and a powder reservoir (28a) and a gas reservoir (28b), which are concentric and positioned around the optical fibre and issuing into a dispersion chamber (26) and a confinement ring (16) having two nozzles positioned between the photoionic head and the material to be treated in order to ensure the ionization of the dispersed powder.