Surface roughness measurement by depolarization method

Abstract

A fiber profilometer based on a polarization manipulation technique is developed to measure both surface roughness and profile simultaneously. The depolarization effect caused by the surface scattering is utilized to characterize the roughness properties. A theoretical model is developed to study the second-order dependence of depolarization to quantify the surface roughness characteristics. Experiments are carried out to demonstrate and verify the relationship between the depolarization and the surface roughness. This technique can simultaneously achieve the properties of the surface profile and roughness based on a fiber profilometer system.

Adaptive image enhancement algorithm based on the model of surface roughness detection system

“…On the other hand, the HE distributes the gray level of the probability density function (PDF) of the original image to more output gray levels, while merging or compressing the relatively small gray levels of the PDF to enhance the DRC of the image and the contrast. However, the HE method also has some obvious defects [15]. In view of the insufficiency of AGC and HE processing methods in the detailed control [16], some of the more complex algorithms have also been developed [16][17][18].…”