Lasers are widely used for marking and engraving many materials. Marking has a wide range of applications in the automotive, electronics/semiconductor, aerospace, medical and food/beverage industries. The benefits of laser marking and engraving over other traditional marking technologies are manifold. First, the processes are non-contact and do not cause mechanical stress. It is a very flexible, essentially maintenance-free process, and results in very precise and permanent markings on a wide variety of materials. The low cost of consumables is also an advantage.
Laser marking uses a laser beam controlled by a galvanometric scanner head. Graphics are usually created through vector data, which allows for the highest marking speeds. A flat-field lens focuses the laser beam and ensures that the focus position is always in the same plane throughout the work area.