Laser beam shaping is an established method to adapt the power distribution to the specific requirements of a particular laser application. The first applications to use beam shaping are laser surface treatment applications, such as laser heat treatment. Dynamic beam shaping is more flexible compared to static beam shaping, so it allows a precise adjustment of laser power distribution, even during laser processing. Nowadays, dynamic beam shaping focuses more on narrow gap welding, the welding of hard-to-weld materials like aluminium alloys, and on thick plate cutting. Fast galvanometer scanners are currently used to provide appropriate beam shaping, but new techniques such as microelectromechanical system (MEMS) scanners are on the way.
Effective process control is dependent upon careful and precise monitoring of the laser power. In addition to exploring the role of laser power monitors in improving process stability, this white paper presents a solution for the gap that exists within detectors' power range and wavelength range.
Countless applications rely on laser processing systems driven by highly dynamic galvo scanners, which precisely position the laser beam onto workpieces. A new patented digital encoder has succeeded in breaking past current dynamic-performance limitations – while simultaneously retaining the highest precision for high-dynamics applications.
Gemma Church investigates the explosion of cross-industry plastic welding techniques