| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To provide a laser marking apparatus and a work distance adjustment method for the same which facilitate adjustment of the work distance so as to realize an optimum laser beam spot diameter according to a work to be marked. <P>SOLUTION: The laser marking apparatus 1 is constituted in such a manner that a marking mode to mark marking information and a work distance adjusting mode to adjust the distance between a converging lens and a work to be marked can be selected. When the laser marking apparatus selects the work distance adjusting mode, a reference graduation line is projected on the work to be marked by scanning guide beam from a visible light source for guide on the work to be marked, and visible light is obliquely irradiated from a light source for visible light spot. The visible light spot is moved on the work to be marked according to the distance between the converging lens and the work to be marked, and the spot diameter during the marking can be discriminated by the graduation of the reference graduation line to indicate correspondence between the moving position and the spot diameter during the marking. <P>COPYRIGHT: (C)2005,JPO&NCIPI</p> |
