Continuous measurement of the surface roughness of a...

Details Continuous measurement of the surface roughness of a... Continuous measurement of the surface roughness of a...

G - Physics

01

B

33/60

G01B 11/30 (2006.01)

Patent

CA 1265925

ABSTRACT A light beam, e.g. from a laser, is transmitted onto the surface of a cold-rolled product such as steel strip. The light beam has a wavelength at least equal to the maximum roughness of the product surface. The reflected light energy is measured, preferably in the specular direction with respect to the incident beam; the surface roughness is deduced from that measurement. The light beam may be interrupted to provide two beams alternately incident on the same spot at different angles.

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