公开(公告)号：EP1685920A4

公开(公告)日：2008-12-10

申请号：EP04799712

申请日：2004-11-10

Applicant: ARAI CORP

Inventor： SATO KAZUO

IPC: B23K26/00 ,  B23K26/06 ,  B23K26/36 ,  B32B27/00 ,  G06K1/12

CPC classification number: G06K1/126 ,  B23K26/064 ,  B23K26/0643 ,  B23K26/0648 ,  B23K26/0665 ,  B23K26/361 ,  B23K2201/18 ,  B23K2201/34 ,  B23K2201/36 ,  B41M5/267

Abstract: A laser beam is irradiated on a workpiece (W) to transform a portion of the inside of the workpiece, the portion being at a focal point of the laser beam, thus putting a dot in each predetermined area. A laser marking device has acquiring means (10, 20), coordinate setting means (30), and laser marking means (40). The acquiring means (10, 20) acquire, as information on a dot, at least two-dimensional position information of an exposed section of a workpiece (W) and density information of the dot. The coordinate setting means (30) calculates, for each dot according to the density information, dot depth information showing the distance from the surface of the workpiece (W) to the dot in the thickness direction of the workpiece (W), and the coordinate setting means (30) sets three-dimensional coordinates for each dot based on positions specified by the dot depth information and the two-dimensional position information. The laser marking means (40) performs marking with the three-dimensional coordinates as a laser beam focal point.

公开(公告)号：EP1655683A4

公开(公告)日：2009-06-10

申请号：EP04771760

申请日：2004-08-11

Applicant: ARAI CORP

Inventor： SATO KAZUO ,  KATO MITSUYOSHI

IPC: G06K1/12 ,  B23K26/00 ,  G05B19/418

CPC classification number: G05B19/4183 ,  G05B2219/31304 ,  G06K1/121 ,  Y02P90/10 ,  Y02P90/14

Abstract: A 2-dimensional code formation method includes: a step of specifying the code size of a 2-dimensional code; a step of specifying storage information which is written into the 2-dimensional code; a step of deciding the cell size of a unit cell constituting the 2-dimensional code; a step of specifying the step size or the number of dots arranged vertically and horizontally n × m (n and m are natural numbers) within the unit cell; a step of generating laser marking information according to the code size, the storage information, the cell size, the step size or the number of dots; and a step of laser-marking the 2-dimensional code according to the laser marking information.

公开(公告)号：EP1758045A4

公开(公告)日：2008-10-15

申请号：EP05737080

申请日：2005-04-26

Applicant: ARAI CORP

Inventor： SATO KAZUO

IPC: B23K26/00 ,  G06K1/12 ,  B60R22/03

CPC classification number: G06K1/126 ,  Y10T74/1967

Abstract: It is judged whether a marking portion formed on a material becomes a bright mark or a dark mark. According to this judgment, for the work W of a material in which the marking portion becomes a bright mark, the code symbol of the 2-dimensional code of the original image is bright/dark-reversed to generate a reversed code symbol 1R. Thus, a laser marker (10) is controlled so as to apply a laser beam to the cell of the background portion without applying the laser beam to the cell of the code portion. On the other hand, in the case of the normal material in which the marking portion becomes a dark mark, the laser marker (10) is controlled to apply the laser beam to the cell of the code portion without applying the laser beam to the cell of the background portion.