Sheet-surface analyser and method of analysing a sheet-surface

摘要

The present invention relates to a sheet-surface analyser (10) including illuminating means (32) for casting shadows on the sheet-surface; capturing means (36) for capturing an image of the shadows; analysing means (40) for analysing the captured image to thereby analyse the sheet surface; and curving means (22) for curving the sheet, wherein the illuminating means and the curving means are configured to enable the illuminating means to cast shadows on a curved part of said sheet-surface, and the capturing means is configured to capture said shadow-image.