| 摘要 |
<p>The present invention is a laser marker which is capable of quickly marking even workpieces having different marking heights without deteriorating marking accuracy. In the laser marker (1) for marking the surface of a workpiece (4) by projecting a laser beam (2) having various pattern information onto the surface of the workpiece (4) through a condenser lens (52) and a glass plate(s) (53) for changing the focusing distance of the condenser lens, the glass plate(s) (53) is(are) stored in a housing (5) together with the condenser lens (52). A single glass plate or a plurality of glass plates (53A, 53B, 53C) having different thicknesses are used and a first glass plate drive unit (53) for moving the glass plate or one of the glass plates into and out of a laser beam path is provided. <IMAGE></p> |
