Product Code: PIC06_903_2

Camera Based System for Laser Beam Online Monitoring
Authors:
Jan Hannweber, Fraunhofer IWS; Dresden Germany
Berndt Brenner, Fraunhofer IWS; Dresden Germany
Eckhard Beyer, Fraunhofer IWS; Dresden Germany
Steffen Bonss, Fraunhofer IWS; Dresden Germany
Presented at PICALO 2006

Surface hardening with high power diode lasers has been developed to an industrial accepted process in the last years. The multiple adoption of this complex process in the industrial environment make great demands on process control, safety und simplification. To meet these demands a special camera based monitoring system has been developed. This system is able to monitor many laser beam characteristics during the hardening process online, which creates new options regarding the process quality control. Furthermore typical commercial high power laser deliver two different wavelength superposed to one beam. For a proper verification of the beam characteristics the system can measure each wavelength separately in real time. It is possible to acquire and control laser beam shaping for example by a scanning system. As sensor a low cost camera is used. All parameters like accuracy, resolution and the measured spectrum are adaptable to the specific requirements. The system can be integrated very easily in existing hardening systems controlled by software. The state of the development of this system is demonstrated on typical applications.

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