OPTICAL ELEMENT, PRODUCING METHOD THEREOF, AND METHOD FOR PRODUCING ORIGINAL BOARD

摘要

PROBLEM TO BE SOLVED: To provide an optical element having high productivity and excellent anti-reflection properties.

SOLUTION: The optical element has an anti-reflection function and is provided with a substrate and many structures which are arranged on the surface of the substrate at a fine pitch shorter than the wavelength of visible light and each of which includes a protrusion or a recess. Respective structures are arranged so as to make tracks of two or more rows on the surface of the substrate and form a quasi-hexagonal lattice pattern. When the arrangement pitch of the structures in the same track is defined as P1 and the diameter of the bottom face of the structure in the track direction is defined as 2r, the ratio ((2r/P1)×100) of the diameter 2r to the arrangement pitch P1 is ≥85%.

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