Patent ID: 8164027
Filing Date: 2012-04-24
Classification: B23K

Abstract:
1. A laser processing system that irradiates a laser beam on a surface of a workpiece to perform laser processing, the laser processing system comprising: a processing laser oscillator, a condensing optical system including a condenser lens, two or more visible laser oscillators, movement adjusting means for adjusting the condenser lens and the visible laser oscillators to move forward and backward in synchronization with each other, imaging means for imaging spot lights of visible lasers on the surface of the workpiece, and image processing means for subjecting an imaged video to image processing and displaying an image after the processing, both a processing laser and the visible lasers being irradiated on the workpiece via the condenser lens, characterized in that the laser processing system further includes calculating means for calculating, in a state in which the respective visible lasers are focused on a focus position of the processing laser, center of gravity positions of spot lights of the respective visible lasers formed on the surface of the workpiece according to the movement of the condenser lens and a distance between centers of gravity that is a distance between those center of gravity positions and control means for controlling the movement adjusting means such that the distance between centers of gravity is adjusted to zero or substantially zero.