Method for design of reflective surfaces producing prescribed two-dimensional irradiance distributions

A method for design of reflective surface producing the prescribed irradiance distribution from extended light source is presented. The method includes parameterization of the reflective surface by bicubic spline and optimization of its parameters from condition of required irradiance distribution generation. The surfaces producing uniformly illuminated rectangular and elliptical areas are computed. The non-uniformity of the generated irradiance distribution is less than 10% in both cases.