A method of designing diffractive optical elements focusing into plane areas

Abstract

Abstract We propose a numerical method for designing phase function of diffractive optical elements (DOEs) aimed at focusing into a plane area of complex shape. The method is applied to factorable intensity distribution in the domain of focusing and factorable illuminating beam of arbitrary cross-section. The diffraction analysis of a direct problem of focusing into the plane region is carried out. Based on a specially developed software, the numerical experiment was carried out, which allowed us to find that the theoretical power efficiency of typical DOEs is no less than 85%.