A laser system for reprofiling a surface comprising a laser and an erodable mask disposed between the laser means and the surface for providing a predefined profile of resistance to erosion by laser radiation, and control for controlling the laser such that upon irradiation of the mask, a portion of...http://www.google.com.au/patents/US5019074?utm_source=gb-gplus-sharePatent US5019074 - Laser reprofiling system employing an erodable mask
