Verfahren und Vorrichtung zur on-line-Ueberwachung bei der Werkstueckbearbeitung mit Laserstrahlung

Process for the on-line monitoring of workpiece machining by means of laser radiation, in particular for the detection of welding defects by observation of weld spatter. In said process, light emitted from the area around the machining point applied with laser radiation is fed to two optical recievers through a beam splitter, said receivers sending the signal to an evaluation device in which machining result data is recovered. In order to be able to observe precisely the optical processes in the area of the machining point for short periods of time, the process is designed to detect the emitted light by means of a laser beam focusing device, the two line-focusing devices focus the said light transverse to the two receivers forming receiver rows, acting unidimensionally and arranged at an angle to each other, and data is recovered via a local and/or a statistical brightness distributor of the observed area from the electrical signals of the measuring cells of the receiver rows in the ev aluation device