Method and apparatus for marking a pattern on an article with a laser including partial feedback of the laser output for generating the marking beam

摘要

In a method and apparatus for marking a pattern on an article with a laser, a device for producing a mask pattern in accordance with an electro-optical effect is utilized so that any reflection of laser energy off of the mask pattern is avoided. Further, laser energy not utilized for the marking of the pattern is fed back to a stage previous to the mask pattern stage. Accordingly, the energy efficiency of laser usage is increased and parts used therein is not damaged by undesirable reflection of laser beams.