Heat Conduction Joining the Multispot Focusing Lens

Author: Cornelia Halbhuber
Wednesday, February 21, 2024
Sill Optics

Despite the rapid development of modern lasers, the Gaussian intensity distribution often leads to problems, especially in laser material processing. When welding wide weld seams, a top-hat profile would often make much more sense in order to heat the weld seam as homogeneously as possible. In narrow curves, the different feed rates on the inside and outside of a wide weld seam result in further inhomogeneity. For this reason, a special optical system was developed that delivers homogeneous intensity distribution – both in straight lines and in narrow curves. The intensity distribution of a wide top-hat profile can be changed locally and temporally by nine parallel beams. The welding head is installed on a robotic arm that travels along the weld seam and temperature homogeneity of >90 % within the spot can be achieved.