An ablation apparatus for ablating an object to a uniform depth by a laser beam. The laser may be an excimer laser, having non-uniform beam intensity of Gaussian distribution and like. Therefore the laser beam is scanned to the non-uniform intensity distribution and irradiated on the surface of the objection,...http://www.google.com/patents/US5507799?utm_source=gb-gplus-sharePatent US5507799 - Ablation apparatus for ablating an object by laser beam
