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LASER OPERATING PROCESS AND LASER DEVICE

  • US 20090272724A1
  • Filed: 05/01/2009
  • Published: 11/05/2009
  • Est. Priority Date: 05/02/2008
  • Status: Active Grant
First Claim
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1. A process for processing and/or joining work pieces by means of laser radiation, with an effective power laser and a pilot target laser that emit an effective laser beam and a pilot laser beam of different wavelengths, with the laser beams of the effective laser beam and of the pilot laser beam being imaged on the work pieces by means of laser optics with randomly selectable beam patterns that are superimposed and identical in terms of position and form, wherein the form of the beam patterns is determined with at least one diffractive optical element (DOE) that is integrated in the laser optics, either with one diffractive optical element being used for the two laser beams and, after the diffractive optical element, the smaller beam cross-section of the pilot laser beam being adjusted to match the larger beam cross-section of the effective laser beam, or with two differently designed diffractive optical elements being used, with one diffractive optical element being associated with each of the two laser beams, with said diffractive optical elements matching the beam cross-section of the pilot laser beam and the beam cross-section of the effective laser beam so that the size of the beam patterns on the work pieces is approximately the same.

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