Original title: Adaptive optics for control of the laser welding process
Authors: Mrňa, Libor ; Šarbort, Martin ; Řeřucha, Šimon ; Jedlička, Petr
Document type: Papers
Conference/Event: Optics and Measurement 2012, Liberec (CZ), 2012-10-16 / 2012-10-18
Year: 2012
Language: eng
Abstract: The laser head with f xed focus optics is commonly used for the deep penetration laser welding. In such case the geometry and position of the beam waist are def ned by the focusing lens. If the laser beam incident on the focusing lens is not well collimated but divergent and its divergence can be varied by proper adaptive optical elements, then also the geometry and position of the focus will be changeable. In this way it is possible to affect the energy coupling from the laser beam to the keyhole walls and thus to control the geometry and quality of the weld. In this paper we present a theoretical and numerical study of the beam shaping by adaptive optics and its inf uence on the weld quality. For the CO2 laser welding machine the adaptive optics was realized by a deformable mirror and its effect was tested also experimentally. For the solid-state laser welding machine we designed a laser head with changeable distance between the optical f ber and the collimating lens and we simulated its performance.
Keywords: adaptive optics,; beam shaping; laser welding beam shaping; power optics
Project no.: 2A-3TP1/113 (CEP), ED0017/01/01
Funding provider: GA MPO, GA MŠk
Host item entry: Optics and Measurement 2012. Proceedings of the International Conference, ISBN 978-80-87026-02-1

Institution: Institute of Scientific Instruments AS ČR (web)
Document availability information: Fulltext is available at the institute of the Academy of Sciences.
Original record: http://hdl.handle.net/11104/0215507

Permalink: http://www.nusl.cz/ntk/nusl-135546


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