Laser marking system and method

摘要

A laser marking system for placing a mark on a metallic object member, the mark being inherent to the object member, comprises a laser-oscillating device for oscillating a laser beam according to a condition associated with laser marking, a laser scanning optical system for guiding the laser beam emanating from the laser-oscillating device onto the surface of the object member and scanning an irradiated spot of the laser beam on the surface of object member according to the condition, and a laser actuation controller for presetting the condition based on not only a targeted melting thickness of a subsurface layer to be formed in a surface portion of the object member but also differences in surface roughness produced between a laser-scanned surface and a remaining non laser-scanned surface portion of the object member, thereby the laser-scanned surface portion providing the mark. <IMAGE> <IMAGE>