| 摘要 |
<p>PROBLEM TO BE SOLVED: To provide an anti-reflection film having a superior anti-reflection property over a wide wavelength range, and to provide optical elements having the same.SOLUTION: An anti-reflection film 100 is formed on a light transmission surface of a transparent substrate and comprises, in order from a substrate 1 side to an air layer side, an intermediate layer 2 comprising a plurality of laminated layers and a micro concavo-convex structure 3 having a plurality of micro structure sections with a pitch of no more than 400 nm formed thereon. The micro concavo-concave structure 3 has a thickness of no less than 200 nm and no more than 350 nm and has a region where a refractive index continuously increases from 1.0 in a direction from the air layer side toward the substrate 1. The plurality of layers of the intermediate layer 2 are a first layer 21 through a fifth layer 25 in order from the substrate side to the air layer side. Refractive indexes of the plurality of layers are values at a wavelength of 550 nm, and an optical film thickness is defined as (refractive index at a wavelength of 550 nm)×(thickness).</p> |
