The reproducibility of laser material processing depends mainly on the diameter of the laser beam on the focussing optics. Any variation ofbeam diameter changes the power density in the focus and leads normally to a decrease in processing quality.
Fluctuation of the beam diameter are observed:
In all these cases it is very difficult to ensure a constant high quality of material processing.
ActiveBeam, an intelligent telescope, helps to stabilize the laser beam diameter and to avoid undesired fluctuations.
veBeam is integrated at the laser beam's exit. It compensates the variation of beam diameter. Finally the deterioration of the optical components can be compensated with this active televergence and ensures constant beam diameter in the whole processing area of the flying optic. Also the influence of the thermal run- in of the laser resonator optic is reduced from typical 25 % beam radius variation to 5 - 10 %. scope.
The Active Telescope is controlled by:
a lens based design is ready
The parameters of the teleycope are controled by the discharge current and the time