smartWLI for really rough surfaces

There are still marketing claims that white-light interferometry isn't suitable for rough surfaces. Out of this reason we just scanned a crack area which needs a z-range of more than 1 mm. Here more details:

Ok - there are still systems which integrated focus variation, confocal microscopy and white-light interferometry in one and the same device to measure different surfaces but this isn't necessary if advanced signal processing is used. In contrary GBS has stopped all developments out of the following reasons:

The comparison of a scanning and data quality of a glass blasted surface shows the differences:

smartWLI measuring result:

focus variation measuring result:

The smartWLI measuring result contain much more details compared to focus variation. Using a similar magnification the smartWLI result shows much more details than focus variation. With 10x / 20x objectives and smartWLI you can measures areas inline which would need 50x / 100x and a time consuming stitching process to get similar results using focus variation. The scanning process shows the much better signal quality of the WLI:

smartWLI scanning process:

focus variation scanning process:

The advantage of white-light interferometry get even much bigger on polished low contrast surfaces:

Focus variation cannot scan low contrast surfaces:

Interested? We gladly provide free tests on your samples to prove the performance of our smartWLI sensors and systems.

The system will be presented from 7th - 10th May on the Control show in Stuttgart / Germany. You can contact us for free tickets via [email protected].