Processing the Reflectance Data of Rough Surface for Inversing the Index of Refraction

Inversion of the complex index of refraction will influence object’s polarized characteristics. In this paper, a new method is proposed based on Vimal–Milo method. Analyze the characteristics of reflectance from rough surface and point out the defects of the current methods which avoids the unpolarized component when calculating. Analyze the relative polarized component, derive the inversion model, and devise an algorithm for the optimum solution of the formula using Hooke–Jeeves method. Carry out the inversing and forward simulation using the measurements of the polarization for green paint and Aluminum. The inversing data shows that the precisions are highly improved by 37.8 times and 10 times than Vimal–Milo method, and errors are well within ±0.01, while the forward data shows that the error of green paint decrease 24 times and errors are within 0.0055.