Patent attributes
An antireflective structure includes: a flat layer having a surface; a fine structure layer including: fine protrusions each including: a head end part, and a base face which is at least one of: a circular base face of a truncated cone, the circular base face having diameter of circle, and a polygonal base face of a truncated pyramid, the polygonal base face having diameter of circumscribing circle of polygonal base face, the fine protrusions being arranged on the surface of the flat layer to define a pitch, wherein, with first reflective face formed in head end part of each of the fine protrusions, and second reflective face formed between fine protrusions on the surface of flat layer: each of the diameter of the circle and the diameter of the circumscribing circle is smaller than wavelength of incident electromagnetic wave, and the pitch is smaller than wavelength of incident electromagnetic wave.
