04803374 is referenced by 14 patents and cites 3 patents.

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.

Title
Continuous measurement of the surface roughness of a cold-rolled product
Application Number
6/938239
Publication Number
4803374
Application Date
December 5, 1986
Publication Date
February 7, 1989
Inventor
Adolphe A Bragard
Esneux
BE
Guy A Monfort
Montegnee
BE
Agent
Holman & Stern
Assignee
Centre de Recherches Metallurgiques Centrum Voor Research in De Metallurgie
BE
IPC
G01H 21/86
View Original Source