LASER DEVICE WITH LOW MODE IRRADIATION FOR HEAT TREATMENT OF MATERIALS Russian patent published in 1994 - IPC

FIELD: material treatment by laser irradiation. SUBSTANCE: laser device includes a generator and at least one additional generator with active elements and optical system, converting beams of the separate generators to a narrow parallel beam. The radiation of the generators is directed towards one point, arranged in a focus of the optical system with angle ϕ of beam convergence, satisfying to condition tg tgϕ<(D-d)/F (D-d)/F, where ϕ-beam convergence angle; D - diameter of aperture diaphragm of the optical system; d - diameter of a beam of one of generators in a place of the diaphragm arrangement; F - focal distance of the optical system. EFFECT: enhanced efficiency. 1 cl, 5 dwg