FIELD: physics.
SUBSTANCE: optical element has a base and primary and secondary structures lying on the surface of the base and representing a protrusion or depression. The primary structures are arranged in form of a plurality of rows of tracks on the surface of the base with spacing equal to or less than the wavelength of visible light. The secondary structures are smaller than the primary structures. Other versions of the optical element are possible. The secondary structures can be made between the primary structures and on adjacent areas, and the primary structures are connected to each other by the secondary structures. The spatial frequency of the secondary structures is higher than the frequency obtained based on the period of arrangement of the primary structures. The primary structures are made periodically in the configuration a hexagonal or quasi-hexagonal array or a tetragonal or quasi-tetragonal array and lie along the orientation of the corresponding symmetry. The secondary structures can be arranged on surfaces of the primary structures. The lower parts of adjacent structures can overlap each other.
EFFECT: improved antireflection characteristic and high technological effectiveness.
21 cl, 56 dwg, 1 tbl
