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International Congress on Applications of Lasers & Electro-Optics
Today merely a few monitoring systems for inprocess detection of laser welding defects are commercially available. Despite a trend towards cameras, the industrially most powerful concept is still a photodiode with optical filter, measuring thermal emissions from the melt surface and from the plasma or laser beam reflections. The monitoring rule for each application is identified empirically through temporal correlations between dynamic signal changes and obtained welding defects. The mechanismsdoi:10.2351/1.5061198 fatcat:2yv5wh7xvrhmfjvw24fd5v3q4q