Patent ID: 9322965
Filing Date: 2016-04-26
CPC Classification: G02B

Claim Text:
1. An optical member, comprising: a transparent substrate; and a dielectric multilayer provided on the transparent substrate, the dielectric multilayer comprising unit stacks each of which consists of: a high-refractive index layer having a refractive index of 2 or more; and a low-refractive index layer having a refractive index of 1.6 or less and stacked on the high-refractive index layer, wherein each of the unit stacks has an optical thickness ratio (n wherein a total number of the unit stacks is 15 or more, wherein a number of the unit stacks having an optical thickness ratio of 3 or more is 10 or more, and wherein the dielectric multilayer further comprises at least 5 unit stacks each of which consists of: a high-refractive index layer having a refractive index of 2 or more; and a low-refractive index layer having a refractive index of 1.6 or less and stacked on the high-refractive index layer, the at least 5 unit stacks satisfying in formula: T