Patent ID: 8597767

Claim:
An optical element, comprising: a band-shaped nanostructure film including recesses and protrusions in nanometer size formed continuously on a surface of the nanostructure film; and a band-shaped lamination film attached on the nanostructure film, wherein the nanostructure film includes a nanostructure-free region free from the recesses and protrusions in nanometer size in both ends along a longitudinal direction of the nanostructure film, the nanostructure film further including a moth-eye structure on which a plurality of conical protrusions of 150 to 400 nm in height are formed as the recesses and protrusions, the moth-eye structure is continuously formed in a band-shape along the longitudinal direction of the nanostructure film, and the lamination film is detachably attached to a surface of the nanostructure film and is detachably in contact with the nanostructure-free region of the nanostructure film, wherein a proportion of a width of the nanostructure-free region relative to a dimension of the band-shaped nanostructure film in a width direction is 1% or more.