Application
Absolute distance, not just displacement
Interferometric displacement measurement counts fringes and loses its reference if the beam is interrupted. Comb-based ranging measures absolute distance, because the pulse train carries its own time reference — which also makes it suited to thin-film thickness and refractive-index measurement.
Where it is used
- Absolute distance measurement over long working ranges.
- Thin-film and layer thickness, including multi-layer stacks.
- Refractive index determination from the same measurement.
- Integration into inspection instruments as an OEM source.
Specifying a ranging or thickness measurement?
Send the range, the accuracy target and the surface you are measuring.