Dimensional metrology is about the measurement of dimensions and forms of physical objects, often material standards or workpieces. The SI base unit concerned is the metre; derived units are its powers from the 0th to the 3rd order: angles (dimensionless) [m0], lengths [m1], surfaces [m2], volumes [m3]. When the position to a reference system is of interest, the metre combines itself into vectors: along a line (scalar or 1D), in a plane (2D), in the space (3D).
The scale concerned ranges from nanometrology (dimensions or critical characteristics down to a 1 nm) to large volume metrology (up to 50 m), with the exclusion of geodesy (up to 1 000 km) and of the space.
Our dimensional metrology laboratories are located underground and protected from temperature and vibrations. The temperature is air conditioned to 20 °C (ISO 1) to minimise thermal expansion.
We do research according to projects and under contract, and curiosity driven. We also do very diverse calibrations: very tiny objects (e.g. nanoparticles), very tiny characteristics of larger objects (e.g. surface texture and gratings), medium size dimensional standards (e.g. gauge blocks, rings, plugs, step gauges, spheres), form standards (e.g. hemispheres and straight edges), angle standards and instruments (e.g. polygons, autocollimators, levels), coordinate measurements (gears, complex geometry).