关键词: 光学 , 激光 , 散射 , 镜向反射 , 非接触

Abstract: Taking aim at measuring the precision of surface microcosmic profile of the cold-rolled steel plate, the principle and technique of measuring surface roughness parameters about the prolile arith?metic average error Ra and the peaks per inch(FFJ) were proposed. The models of profile arithmetic average error Ra and correlation length T of the cold-rolled steel plate surface were established based on the Beckmann light scattering theory and the quantitative relation between specular reflection and surface roughness was founded. Through the theoretical and test result analysis, the optimal laser inci?dence wavelengtn was found, and the measuring subsystems of Ra and PPI were designed. By using an integration technique, the Ra unit, PPI unit and other various units can be integrated. So the real?time and simultaneous non-contact measurement of multi- parameters can be realized.

Key words: optics , laser , scattering , specular reflection , non-contact