Non-contact thickness measurement
STIL chromatic confocal sensors are designed to measure thicknesses without contact, by transparency or by step height difference and face-to-face, in all environments such as in-line industries or laboratories.
The principle consists in measuring the position of a diopter, i.e. the interface between two surfaces of different refractive index, and, simultaneously, the position of another diopter.
The difference between the two distance measurements indicates the optical thickness measurement, from which the mechanical thickness is deduced.
The measurement of samples comprising several layers is possible using the same method: the multi-layer measurement software is available on some STIL controllers.
