One- or two-dimensional surface waviness measurement of shiny material

摘要

The process comprises illuminating the surface with a light source, having a spatially dependent density with at least one light-dark passage, recording reflected light from the surface with a camera which is focused on the surface, and digitally evaluating the camera signal. The light-dark passage of the light source may comprise a large contrast, whereby the blind of the camera is opened wide, or a soft contrast, whereby the blind is largely closed.