Method for compensating the change of the focal position of the laser processing head and a laser processing head

摘要

As for this invention, as for this head 100, it has camera 102 in regard to the laser processing head 100 in order to machine the work with processed laser beam 108, with respect to the position where in the front of the aforementioned camera image pickup lens unit 116, is arranged in order to watch the machining territory of the work which is machined by work laser beam 108 in inside beam route, is stipulated furthermore vis-a-vis on or the said surface 104 work surface 104 focusing lens unit when focus shift of 114 for the focus adjusting of processed laser beam 108 and focus lens system 114 occurs the camera pictureIn order to calculate revision adjustment portable quantity z _OS and z _B making use of the adjustment portable quantity dKL of image pickup lens type 116 of optical axis direction in order to adjust the focus for the second time, it has with the appraisal unit 122 which, is designed this revision adjustment portable quantity it compensates the focus displacement of the focus lens system 114 for the position where it is stipulated work surface 104 or vis-a-vis the said surface 104.