The WLI Technology we use at 3D.aero has many special features that differentiate the process from other surface data measurement methods like camera-based systems. For one, the White Light Interferometry is not influenced by any reflective surface that might disturb visual measurements. The Smart Pixel Technology allows the inspection of nearly any surface condition with no preparation required. Therefore, almost any workpiece can be measured without having any trouble of disturbances. The WLI Technology also has the feature that the measurements happen in the direction, the measuring head is facing. This coaxial measurement technique allows for deeper geometrical insights into drill holes for example, which gives far more reliable information in comparison to only visual surface measuring methods. At last, the incredible high resolution of the WLI process is one of the most impressive features. The system delivers a resolution of about 0.2 μm in the x- and y-axis. The z-axis has a resolution of up to 100 nm in total. With this high resolution, even μm-scratches from the workpiece production can be made visible. Especially the function that the lateral sensor resolution is variable, so it can be defined based on customer requirements (typical lateral resolution 5-20µm), is a highly use-case oriented function.