The Dimensional Metrology Laboratory of Cetim (Technical Center of Mechanical Industries) based in Senlis, now has an InfiniteFocusG5 AdvancedReal3D optical 3D metrology system from Bruker Alicona.
With this new optical 3D metrology system, Cetim is enriching the machinery fleet at its Senlis site, enabling it to meet its internal needs and those of industrialists in the northern half of France. The InfiniteFocusG5, a versatile focal variation metrology system, offers the ability to perform 3D measurements of very high-resolution shapes on micro-geometries with very tight tolerances, but also 2D and 3D roughness measurements in hard-to-reach areas for contact sensor.
The focal variation combines the shallow depth of field of an optical system and its vertical scanning, in order to provide topography information in real colors from the variation in sharpness of the images on the sensor. Unlike other more traditional optical technologies, which are limited to coaxial lighting, the measurable maximum slope does not depend solely on the numerical aperture of the lens used. The focal variation can be used with a wide range of different light sources (such as ring lighting) that allows the measurement of angles of more than 87 degrees on the slopes. It can be used on surfaces with a wide range of different optical reflectances, which is a major asset for measuring parts with complex geometries.
Detail in the measurements
With 3D data files of up to 500 million points, Alicona systems are capable of providing measurement files with a large amount of detail. The high point density of focal variation allows operators to consistently obtain very fine vertical and lateral resolutions, even on large measurement volumes, making it possible to obtain connected measurements on small rays, angles and roughness located on hard-to-reach areas.
The AdvanceReal3D rotation unit transforms the profileometer into a real 5-axis measuring machine. This rotation unit allows you to position a piece in a chuck and then scan it from different angles. The individual measurements obtained under different orientations are then merged into automatic, in order to generate a complete 3D data file. Equipped with a high-precision rotation axis and tilt axis, both motorized and enslaved, the AdvancedReal3D is calibrated to ensure automated, repeatable and connected measurement of shape and roughness across the entire geometry of the parts.
Key applications for which InfiniteFocusG5 can add to traditional metrology means are the measurement of micro-geometries on cutting tools, micromechanical parts, measurement of shelving and corner breaking on all types of precision or safety parts such as those encountered in aeronautics, characterization of non-compliances, defects or wear , as well as high-resolution 3D surface scanning.