Surface engineering is a crucial technology in many industry sectors. It consists of adding functionality to a surface by coating or texturing it. Currently, coating technologies are mature and well established, but coatings suffer from limited durability and poor sustainability. Laser surface texturing is nowadays emerging due to the latest improvements in high resolution, excellent repeatability and keeping the process non-contact. However, associated costs with the laser texturing system and

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... low throughput are still to improve. In such a process, quality assurance is mandatory. A surface characterization procedure needs to take part of the full process without impacting the cycle time. These premises can be attained using a non-contact, optical 3D profiler integrated with the laser texturing machine. We have developed a miniaturized optical sensor head that integrates Coherence Scanning Interferometry (CSI) as the measuring technique with interchangeable optics, allowing to adapt the lateral resolution to the laser texturing process. Interferometric measurements are carried out using dual-wavelength illumination, granting measurements from 25 µm/s with 1 nm of system noise to more than 200 µm/s with less than 100 nm of system noise. Reduced dimensions of the sensor head make possible to integrate it inside the laser texturing machine without interfering with the laser texturing process, even parallelizing both texturing and measurement. Together with feedback analysis and finite element modelling, a closed-loop manufacturing scheme is achieved.