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Highly dynamic positioning of individual laser beams in a multi-beam system for laser surface processing

: Hofmann, Oskar; Chemerenko, Olga; Finger, Johannes-Thomas; Eifel, Stephan; Stollenwerk, Jochen; Loosen, Peter

Fulltext ()

Procedia CIRP 94 (2020), pp.812-816
ISSN: 2212-8271
Conference on Photonic Technologies (LANE) <11, 2020, Online>
Journal Article, Conference Paper, Electronic Publication
Fraunhofer ILT ()
multi-beam; optics design; dynamic beam positioning; distortion; 3D processing

State-of-the-art multi-beam optics suffer from a distortion of the multi-beam array when the array is scanned over the work piece. This distortion is inherent to 2D (and 3D) laser scan heads and heavily limits the usable scan field and/or achievable processing accuracy. Here, an optical system for the independent 3D-positioning of individual beams in a multi-beam setup is presented. This approach allows to dynamically and precisely position each individual beam even for large scan fields and on tilted or curved work pieces.