Due to high demands on quality assurance and the necessity of permanent documentation of product quality forced by ISO 9000 and in-house regulations, the need for reliable online process control systems increases. State-of-the-art sensor systems for process monitoring analyze electromagnetic radiation out of the process zone. This paper reports on advantages using a different observation method. By an additional diode laser beam coaxial to the working laser the material surface is being illuminated; the reflected light is observed likewise coaxial by a CMOS camera. This setup offers new observation possibilities for research and process control.
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© 2005 Laser Institute of America.
2005
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