Abstract
The optical system for on-line measurments of the surface roughness, which is based on the laser light scattering method, has been developted. This system is capable of acquiring the average slope of the surface profile only from measuring the intensity of scattered light, even if the sample plates are moved at high speed in its own plates and are tilted within 0.5deg. For application of this system to industrial inspections, two examples, i. e., surface roughness variations of cold-rolled steel sheets and coating weight variations of commercial quality galvanized sheets, were experimentally estimated. These results show the availability of the developed system.
