Techniques
D Version
The technique used by Philtec sensors is based on the amount of light reflected by the sample illuminated by optical fibers. Other optical fibers capture this reflected light. Two types of linear measuring range are considered, one being the near field and the other the far field. this mode is reserved for the homogeneous surface which does not move transversely to the probe
RC version
Similar to the previous version, this version is adapted to non homogeneous surfaces or having transverse movements (Scrolling or rotation of the sample) because based on two measuring channels from which we will extract a reflection difference proportional to the distance (Compensated Reflection)