Initial Situation: Inspection of a laser weld seam for pores and geometrical anomalies The production of a client in automotive industry is subjected to extremely stringent quality requirements. This is valid particularly also for the precision of laser weld seam of fine mechanical work. 100% inline supervision is required for the following task: A laser weld beam (width ca. 200µm) has to be verified with respect to the presence of pores and geometrical anomalies. Camera inspection performed until now turned out to be not stable. Therefore the client is forced to implement an improved monitoring process. The challenge The resolution required amounts to 4µm. The high gloss finished material and glossy laser weld seam may give rise to reflections, and the space for installation is restricted. A low form factor for the monitoring equipment is imperative.

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