Patent ID: 8155426
Filing Date: 2012-04-10
Classification: G01B,G01N

Abstract:
1. A method for optical inspection of surface roughness, comprising: directing an unfocussed light beam (B) to a surface ( shifting said surface and light beam relative to each other; receiving light (R) reflected from said surface with an optoelectronic detector ( calculating values corresponding to the surface roughness on the electronic signal produced by the detector, wherein said surface roughness is hirsuteness of the wooden surface, using as the optoelectronic detector a camera ( taking at predetermined intervals images (i−n . . . i+n) of said surface ( subtracting the image data of two consecutive electronic images from each other, yielding a set of pixel-related difference data ((i−n)−(i−(n− using the difference data for stating variations in the surface hirsuteness of the surface under study.