Apparatus and method for focus adjustment for a material processing device, and device for laser material processing

Abstract

An apparatus (112) for focus adjustment for a device (100) for laser material processing, which has a movably arranged first lens unit (124), which comprises a first lens (108), and a movably arranged second lens unit (126), which comprises a second lens (110), has an adjustment device (114) which is designed to move the first lens unit (124) in a first direction (116) and to move the second lens unit (126) in a second direction (118) opposite to the first direction (116) in order to adjust a distance between the first lens (108) and the second lens (110) for the focus adjustment.

Dependencies are inferred from the claim text.