Process monitor for laser and plasma materials processing of...

Electric heating – Metal heating – By arc

Reexamination Certificate

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Reexamination Certificate

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10403775

ABSTRACT:
A method for monitoring the processing of a workpiece includes directing an incident laser beam onto the workpiece and measuring a signal emitted from the workpiece. At least two signals are generated by a detector based upon the emitted signal. A workpiece processing quality is determined based upon the ratio of the two output signals and a magnitude of one of the two outputs.

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