Metrology of functional surfaces concerns the quantitative correlation between the geometric characteristics (finiture, shape and size) and performance (such as reflectivity, gloss, etc.) of components whose functionality is highly dependent on the surface. Functional surfaces range from everyday objects (touchscreens) to the most diverse devices (photovoltaic cells, lab-on-chip).

Through the definition of unique descriptors, the metrology of functional surfaces simplify the characterisation of objects from various industries, such as energy, automotive and fashion.