Qualification of optics
In production with lasers, for productivity reasons beam powers used are increasingly being increased up to the range of 6 to 8 or 10 kW and above. This leads to an increasing load on the optics used in the processing heads, in other words, power-dependent focus shift. The absorption properties and dirt contamination level of the optics are increasingly becoming an issue, along with quality assurance of the optics, for the manufacturers of the optics, processing heads and laser systems.
The OpticsQualityMonitor enables the testing of the absorption properties of the optics by suppliers and fabricators, or users in quality assurance. This not only guarantees that the optics have been manufactured within the specifications, but also that they are equal to the requirements during their use. This allows manufacturing or handling errors in the manufacturing chain to be identified, and it guarantees that the optics can deliver their best performance in their use.
The OQM compares the absorption of a translucent optical element, for example from a processing head (lens or flat optics) with the absorption of reference optics (same type: material, refractive index, diameter, radii of curvature and anti-reflective coating). In this process, the heating occurring on the optics surface due to the laser power absorbed in the optics is measured.