Optical system for laser processing head has collimation unit in front of first optical unit and at least one axicon after collimation unit

摘要

The optical system has a collimation unit (3) in front of the first optical unit (6). At least one axicon (5) is inserted after the collimation unit to create an annular radiation field which is rotary-symmetric to the optical axis. The first optical unit has a transmissive or reflective optical component, and a second optical unit (12) after it to re-unify the partial radiation fields (8) created.