Patent ID: 9126860
Filing Date: 2015-09-08
Classification: C03C,G02B

Abstract:
1. An optical member comprising: a glass substrate; and an antireflection film disposed on a surface of the glass substrate, the antireflection film including an oxide layer mainly composed of aluminum oxide and having a textured shape in a surface, and an intermediate layer disposed between the glass substrate and the oxide layer, the intermediate layer including a plurality of sheet-like crystals arranged in a direction of the surface of the glass substrate with a surface of the sheet-like crystals extending parallel to the surface of the glass substrate, wherein the sheet-like crystals have a polygonal shape, a circular shape, or an elliptical shape, with a longest side of the surface of the sheet-like crystals being 10 nm or more and 500 nm or less, and having a thickness of 0.5 nm to 25 nm, wherein the plurality of sheet-like crystals are stacked so that a surface of at least one sheet-like crystal is positioned above an interface between two adjacent sheet-like crystals.