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1 January 1987 Surface-Roughness Monitoring For Industrial Quality Control
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Proceedings Volume 0744, Lasers in Motion for Industrial Applications; (1987)
Event: OE LASE'87 and EO Imaging Symposium, 1987, Los Angeles, CA, United States
A number of surface-monitoring optical techniques are presented for the on-line quality control of materials produced at high production rates. A laser-scattering approach is described for surface-quality inspection of the hot-dip zinc coating in a steel galvanizing line. The detection of localized specular reflectivity, coupled to the fast sheet motion, proved to be an effective method to monitor coating properties such as spangle grain size. Similar investigations are described for the on-line inspection of polymer-coated electric cable. Our approach for such an inspection problem is based on the projection of a uniform-intensity laminar beam across the cable and on the bandpass-filtered detection of the transmitted beam to obtain a resolution better than 5 μm independently of the extruded-cable vibrations. Results of in-plant trials are reported.
© (1987) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
P. Cielo, G. Vaudreuil, and M. Dufour "Surface-Roughness Monitoring For Industrial Quality Control", Proc. SPIE 0744, Lasers in Motion for Industrial Applications, (1 January 1987);


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