Based on the deflectometry principle, the device allows the measurement of the local slopes of the surface. The 3D microgeometry of the surface is calculated by post-processing of the slope maps.

The device is well adapted to on-line measurement of roughness of milled metallic surfaces or to control the micro-geometry of tiny parts. The short measurement time (a few seconds), the high density of the cloud of points measured and the easiness of use make that device a powerful tool for on-line control.