Patent ID: 8088475
Filing Date: 2012-01-03
Classification: G02B,Y10T

Abstract:
1. An anti-reflecting membrane, formed on at least one side of a plate which transmits visible light, comprising fine inorganic oxide particles and a binder, and having a thickness of 60 to 190 nm and pores of 5 to 200 nm in size inside, wherein an arithmetic average surface roughness (Ra) is about 3 nm on a side of the membrane that is not in contact with the plate, the binder and plate are composed of a same material, the pores are distributed more densely inside the membrane than on a surface of the membrane that is in contact with air, and the pores are distributed more densely in a vicinity of the surface of the membrane that is in contact with air than at the surface of the membrane that is in contact with the plate.