Estimates of optical parameters based on mixing rules extending over a wide range of wavelengths

We examine a procedure for constructing estimates of optical parameters for composite materials, whose associated reflectivity function consists of mu ltiscale features relative to wavelength, via mixing rules that extend over a wide range of wavelengths. The parameters associated with these mixing r ules define a system representation of the optical properties of a composit e material. In our procedure, these parameters are optimized with respect t o the measured reflectivity of the composite material and existing optical data for materials similar to those making up the composite system. Estimat es of optical parameters that extend over a wide range of wavelengths can p rovide for well-conditioned inversion, via parameter optimization, of refle ctivity measurements characterized by multiscale features relative to wavel ength.