Patent ID: 8217302

Claim:
A laser processing system that reduces or substantially prevents back-reflections, the system comprising: a laser source to generate an incident laser beam; a laser beam output to direct the incident laser beam toward a work surface; a lens to receive the incident laser beam along a first axis of propagation that is substantially perpendicular to the work surface, wherein the lens comprises a primary axis that is substantially parallel to, and offset from, the first axis of propagation, and wherein the lens is configured to focus the incident laser beam onto the work surface along a second axis of propagation that forms a non-perpendicular angle with the work surface such that at least a substantial portion of a reflected laser beam from the work surface does not return to the laser beam output; and a secondary beam positioner located between the laser beam output and the lens to scan the incident laser beam across the lens, wherein the secondary beam positioner maintains the offset between the primary axis of the lens and the first axis of propagation of the incident laser beam at greater than or equal to about one-half of the incident laser beam's diameter.