Patent ID: 9329368
Filing Date: 2016-05-03
CPC Classification: B23K,G02B

Claim Text:
1. A beam shaping unit for focusing a divergent laser beam onto a workpiece, the beam shaping unit comprising: an optical fiber to deliver a divergent laser beam; a first optical element arranged to receive the divergent laser beam from the optical fiber; a second optical element arranged downstream of the first optical element to receive the laser beam from the first optical element; an optical focusing unit arranged downstream of the second optical element to receive the laser beam from the second optical element; a first focal point adjustment device coupled to the first optical element, wherein the first focal point adjustment device is configured to adjust a focal point diameter of the laser beam by manipulating the first optical element; and a second focal point adjustment device coupled to the second optical element, wherein the second focal point adjustment device is configured to adjust, in a propagation direction of the laser beam, a focal position of the laser beam by manipulating the second optical element, wherein the laser beam is imaged by the first optical element through an intermediate focal point onto the second optical element.