ANTIREFLECTION FILM, OPTICAL ELEMENT COMPRISING ANTIREFLECTION FILM, STAMPER, PROCESS FOR PRODUCING STAMPER, AND PROCESS FOR PRODUCING ANTIREFLECTION FILM

摘要

An antireflection film of the present invention includes a plurality of first raised portions, each of which has a two-dimensional size of not less than 1 μm and less than 100 μm when seen in a direction normal to the film, and a plurality of second raised portions, each of which has a two-dimensional size of not less than 10 nm and less than 500 nm when seen in a direction normal to the film. In at least one embodiment, the antireflection film has a first surface shape or a second surface shape that is inverse to the first surface shape relative to a film surface. In the first surface shape, the second raised portions are provided on the first raised portions and between the plurality of first raised portions, and the elevation angle α of a surface of the first raised portions relative to the film surface is about 90° or more. The antireflection film of the present invention has a more excellent antiglare function than conventional ones.