Patent ID: 7564006
Filing Date: 2009-07-21
Classification: B23K

Abstract:
1. An apparatus for generating a rotating laser beam, in particular for circular welding and/or machining workpieces, said apparatus comprising input means for a laser beam, said laser beam following an optical path through at least one optical system of the apparatus before emerging from said apparatus through an output and impinging onto an impact region of a workpiece, said optical system having a central axis and being intended at least to adjust the position of an image focal point of said laser beam in said impact region, said optical system further comprising a first reflecting surface able to rotate about said central axis, said first reflecting surface being intended to redirect said laser beam into the direction of at least a second reflecting surface intended to reflect said laser beam toward said workpieces, the apparatus comprising means for driving said first reflecting surface in rotation together with said optical system so that their mutual orientation remains still during the operation of the apparatus, wherein said optical system comprises a correcting lens of optical axis arranged so as to be tiltable, such that said optical axis is able to be angled with respect to said central axis to increase the quality of the focus point on said workpieces, and wherein the optical path of said laser beam goes through said correcting lens before being redirected by said first reflecting surface.