Аннотация:New results of s- and p-polarized reflectivity measurements on non-ideal plasma at the frequency of external electromagnetic field nu(las) = 2.83x10(14) s(-1), the plasma density rho = 1.8 g/cm(3) and the parameter of Coulomb non-ideality of plasma Gamma = 1.4 are presented. Using a Fermi-like density profile along the shock wave front, the reflectivity coefficients of non-ideal plasma were calculated for newly obtained experimental data. As physically expected, a single profile is sufficient to obtain good agreement with the experimental data at all investigated optical laser frequencies.