Název: Adaptive optics for control of the laser welding process
Autoři: Mrňa, Libor ; Šarbort, Martin ; Řeřucha, Šimon ; Jedlička, Petr
Typ dokumentu: Příspěvky z konference
Konference/Akce: OaM 2012 International Conference on Optics and Measurement, Liberec (CZ), 2012-10-16 / 2012-10-18
Rok: 2013
Jazyk: eng
Abstrakt: The laser head with fixed focus optics is commonly used for the deep penetration laser welding. In such case the geometry and position of the beam waist are defined 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 influence 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 fiber and the collimating lens and we simulated its performance.
Klíčová slova: evolution; Fresnel absorption; keyhole; multiple reflections
Číslo projektu: 2A-3TP1/113 (CEP), ED0017/01/01
Poskytovatel projektu: GA MPO, GA MŠk
Zdrojový dokument: OaM 2012 - Optics and Measurement International Conference. Proceedings of a meeting, ISBN 9781632661944

Instituce: Ústav přístrojové techniky AV ČR (web)
Informace o dostupnosti dokumentu: Dokument je dostupný v příslušném ústavu Akademie věd ČR.
Původní záznam: http://hdl.handle.net/11104/0256893

Trvalý odkaz NUŠL: http://www.nusl.cz/ntk/nusl-202702


Záznam je zařazen do těchto sbírek:
Věda a výzkum > AV ČR > Ústav přístrojové techniky
Konferenční materiály > Příspěvky z konference