SYSTEM AND METHOD OF LASER DRILLING USING A CONTINUOUSLY OPTIMIZED DEPTH OF FOCUS

摘要

A method of adjusting depth of focus in a laser milling system includes generating a laser beam having a focal plane, positioning a workpiece in the focal plane, wherein a surface of the workpiece is exposed to the laser beam at a point intersecting the focal plane, and adjusting a position of at least one of the workpiece and the focal plane, thereby maintaining a constant ablation rate on the exposed surface of the workpiece throughout the drilling process.