Patent ID: 9214368
Filing Date: 2015-12-15
Classification: B23K,H01L

Abstract:
1. A system for surface treatment of a material having a peripheral edge, comprising: a plurality of individually controllable laser diodes, each generating a beam with a generally Gaussian profile; at least one optical fiber associated with each said laser diode; at least one guide block traversed by said fiber terminations and spaced from said material, wherein no beam shaping elements are mounted between said fiber terminations and material, said one guide block being configured to space said fiber terminations so that said delivered beams overlap to define a resulting beam with a cumulative intensity profile distribution; a sensor array operative to detect a parameter which characterizes said cumulative intensity profile distribution, and output a first signal upon the detection; a motion controlling system operative to control a motion between said material and fiber terminations and including a motion sensor which is configured to detect said peripheral edge of material and output a second signal upon detecting the edge; and a modulation controlling system coupled to said sensor array and to said laser diodes and operative to adjust an output power of each individual laser diode upon receiving said first and second signals to adjust said cumulative intensity profile distribution so as to provide uniform heating of said entire exposed surface of said material including a surface region which is adjacent to said peripheral edge during said motion between said material and said fiber terminations.