Abstract: An antireflection structure (10) comprises a base (1), and a finely roughened antireflection part (2) formed in a surface of the base (1). The finely roughened antireflection part (2) includes a plurality of projections and depressions defined by the projections. The projections are distributed such that PMAX??MIN, where PMAX is the biggest one of distances between tips (2t) of the adjacent projections and ?MIN is the shortest one of wavelengths of visible light rays in a vacuum. The sectional area of each projection in a plane parallel to the surface of the base (1) increases continuously from the tip (2t) toward the bottom (2b) of the depression adjacent to the projection. The shape (2Mt) of a tip part (Mt) of each projection in a plane perpendicular to the surface of the base (1) is sharper than the shape (2Mb) of a bottom part (Mb) of each depression in the same plane vertical to the surface of the base (1).

Abstract: An antireflection structure (10) comprises a base (1), and a finely roughened antireflection part (2) formed in a surface of the base (1). The finely roughened antireflection part (2) includes a plurality of projections and depressions defined by the projections. The projections are distributed such that PMAX??MIN, where PMAX is the biggest one of distances between tips (2t) of the adjacent projections and ?MIN is the shortest one of wavelengths of visible light rays in a vacuum. The sectional area of each projection in a plane parallel to the surface of the base (1) increases continuously from the tip (2t) toward the bottom (2b) of the depression adjacent to the projection. The shape (2Mt) of a tip part (Mt) of each projection in a plane perpendicular to the surface of the base (1) is sharper than the shape (2Mb) of a bottom part (Mb) of each depression in the same plane vertical to the surface of the base (1).

Abstract: A cover plate covering a display panel of a display device has a transparent base having a surface facing the display panel and provided with reflection-reducing minute irregularities. The reflection-reducing minute irregularities consist of numerous projections and numerous valleys lying between the projections, and meet a condition expressed by: PMAX≦&lgr;MIN, where PMAX is the maximum distance between the tips of the adjacent projections, and &lgr;MIN is the minimum wavelength in a visible region in a vacuum. The sectional area ratio of total area of sections of the projections of the transparent base in a plane parallel to the transparent base in the plane increases continuously and gradually in a direction from the tips of the projections toward bottoms of the valleys.

Abstract: A cover plate covering a display panel of a display device has a transparent base having a surface facing the display panel and provided with reflection-reducing minute irregularities. The reflection-reducing minute irregularities consist of numerous projections and numerous valleys lying between the projections, and meet a condition expressed by: PMAX≦&lgr;MIN, where PMAX is the maximum distance between the tips of the adjacent projections, and &lgr;MIN is the minimum wavelength in a visible region in a vacuum. The sectional area ratio of total area of sections of the projections of the transparent base in a plane parallel to the transparent base in the plane increases continuously and gradually in a direction from the tips of the projections toward bottoms of the valleys.