Patent ID: 7343218
Filing Date: 2008-03-11
Classification: B23K,B29C

Abstract:
1. A feedback control system for controlling a laser source, said feedback control system comprising: a laser source outputting laser energy; an optical sensor detecting said laser energy, said optical sensor outputting a measured signal in response to a measured amount of said laser energy; an optical device receiving said laser energy and directing said laser energy to a predetermined location, said optical device further reflecting a first portion of said laser energy toward said optical sensor; and a controller receiving said measured signal from said optical sensor, said controller calculating said first portion of said laser energy, said controller adjusting said laser source to correct for said first portion of said laser energy reflecting from said optical device to obtain a predetermined amount of laser energy at said predetermined location, wherein said predetermined location is a weld joint disposed between a transmissive part and an absorptive part, at least one of said transmissive part and said absorptive part reflecting and/or absorbing a second portion of said laser energy; and said controller calculating said second portion of said laser energy, said controller adjusting said laser source to correct for said second portion of said laser energy reflecting from and/or absorbing in said at least one of said transmissive part and said absorptive part.