| 摘要 |
PURPOSE:To prevent double irradiation and to uniformize marking by specifying laser beam marking of an intersection and its circumferential part when two straight or curved lines configuring a marking pattern intersect each other at an acute angle. CONSTITUTION:When two straight or curved lines configuring a laser beam marking pattern intersect each other at an acute angle, the spot interval and the marking speed between a place where the interval between the central lines of the lines A, B having line width W each makes a half the line width and an intersection 0 are made twice the value in the area except this area, thereby, the density of laser beam spots can be uniformized to obtain a uniform laser beam marking. |
