METHOD AND APPARATUS FOR LASER MARKING

PROBLEM TO BE SOLVED: To always permit high precision laser marking, and to permit the direct marking on the laser projection point, irrespective of whether the collimation direction of a surveying machine is parallel to the laser projection direction of a laser device or whether the shift is generated therebetween. SOLUTION: A first procedure for collimating a collimation target 10 by a telescope part 2 to measure the horizontal angle, the vertical angle, and the distance and a second procedure for projecting the laser light to the collimation target 10 to measure the horizontal angle and the vertical angle are performed in advance. Relative angle data in the laser light projection direction with respect to the collimation direction of the telescope part are obtained. When the marking position is actually collimated by the telescope part 2, the distance measured data to the marking position are obtained. The rotational amounts in the horizontal, depression, and elevation directions for projecting the laser light from the laser device 4 to the marking position are calculated from the distance measured data and the relative angle data, and the laser light is projected to the marking position. COPYRIGHT: (C)2006,JPO&NCIPI