A.M.Zabelin,A.N.Safonov,K.V.Meleshenko.

Technical problem of proposed invention – increase of laser beam using efficiency. The offered optical-focusing head for laser treating includes a tubular housing for laser beam passing, a focusing lens inside tubular housing, nozzle for delivery gas to a workpiece. Outside of a tubular housing there is a concentric ring, which can rotates around of laser beam axis. On a horizontal rod, attached to a ring, there is a balance, on which one end, for direction an auxiliary laser beam to a workpiece, an auxiliary optical-focusing head is anchored. While on the second end the reflecting mirror is anchored, which perpendicularly to the axis of laser beam, going out from the auxiliary optical-focusing head and reflected from job surface.