Patent ID: 8938317
Filing Date: 2015-01-20
Classification: B23K

Abstract:
1. A system for calibrating a laser cutting machine, comprising: a calibration plate arranged to simulate a workpiece; a first quad photodiode (QPD) and a second QPD for converting light including an image of a portion of a surface of the calibration plate into a plurality of electrical signals, wherein the first and the second QPDs are positioned to receive the light propagated from the surface of the calibration plate through the optical path of the laser beam, wherein the calibration plate is illuminated from above by the cutting laser; an attenuator positioned on the optical path to reduce a power of the laser beam; an apodizing filter positioned on the optical path for converting an intensity) profile of the laser beam; a diverging lens positioned on the optical path for diverging the laser beam; and a deflector positioned on the optical path for directing the light toward the first and the second QPDs; and a control system for calibrating the laser cutting machine based on the plurality electrical signals.