公开(公告)号：US20230039431A1

公开(公告)日：2023-02-09

申请号：US17873335

申请日：2022-07-26

申请人： AGC Inc. ,  Optical Coatings Japan

发明人： Hideaki TAKAHOSHI ,  Kazuya TAKEMOTO ,  Keisuke KAWAI ,  Masaaki MIYAKE

IPC分类号： G02B5/20 ,  G02B5/28

摘要： An optical filter including: a substrate; and a dielectric multilayer film laid on or above at least one major surface of the substrate as an outermost layer, in which: the dielectric multilayer film is a laminate including a low refractive index film and a plurality of high refractive index films laid on each other; the dielectric multilayer film comprises four or more high refractive index films that are 15 nm or smaller in thickness; the high refractive index films have a minimum thickness of 1.5 to 5 nm; the high refractive index films have a minimum thickness of 100 nm or smaller; the high refractive index films satisfy the following spectral characteristics (i-1) and (i-2); and the optical filter satisfies all of the following spectral characteristics (ii-1) to (ii-4).