Get an optical profilometer for less than half the price of an AFM or 3D stylus profilometer. The Profilm3D uses state-of-the-art white light interferometry (WLI) to measure surface profiles and roughness down to 0.05µm; adding the PSI option takes the minimum vertical feature size down to 0.001µm. Profilm software can analysis full image, including surface texture(roughness) even on curved surface and step-height. For larger image, the software also can stitch multiple images together.