A FRACTAL SURFACE AND ITS MEASUREMENT BY COMPUTER-SIMULATION

In this paper, a zero-mean and band-limited fractal function is introd uced to simulate a rough surface profile. According to the Kirchhoff T heory, surface roughness measurement is simulated with the help of fas t Fourier transformation (FFT) technology. A relationship between the surface parameters and the reflected light intensity distribution is o btained. In order to quantify rough surfaces, some criteria are propos ed. Numerical results show that these criteria have a strong correlati on with the RMS of surface height and they can be used for surface rou ghness measurement and classification.