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公开(公告)号：US20220206201A1
公开(公告)日：2022-06-30
申请号：US17645786
申请日：2021-12-23
申请人： AGC Inc. , Optical Coatings Japan
发明人： Yosuke SUGIHARA , Yasuyuki TAKIMOTO , Takahiro MASHIMO , Atsushi KOYANAGI , Naoto TATSUOKA , Masaaki MIYAKE , Hideaki TAKAHOSHI
摘要： An optical filter includes a substrate and a dielectric multilayer film laid as an outermost layer on at least one major surface of the substrate. The dielectric multilayer film includes a low-refractive index film and a high-refractive index film provided alternately. At least one film selected from the group consisting of the low-refractive index film and the high-refractive index film satisfies the following optical characteristics (i-1) and (i-2A): (i-1) an extinction coefficient k600 at a wavelength of 600 nm is 0.12 or larger; and (i-2A) a minimum extinction coefficient k1530-1570MIN in a wavelength range of 1530 to 1570 nm is 0.01 or smaller; and the optical filter satisfies the following optical characteristic (ii-1A): (ii-1A) light in a wavelength range of 400 to 680 nm is blocked and light in the wavelength range of 1530 to 1570 nm is transmitted.
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公开(公告)号：US20240159950A1
公开(公告)日：2024-05-16
申请号：US18505171
申请日：2023-11-09
申请人： AGC Inc. , Optical Coatings Japan
发明人： Kaname SETO , Masaaki MIYAKE
CPC分类号： G02B5/28 , G01S7/4811
摘要： An optical filter includes: a substrate; a dielectric multilayer film laid on or above at least one major surface of the substrate; and a protective layer laid on or above the dielectric multilayer film, in which the dielectric multilayer film includes a layer made of amorphous silicon and a layer differing in refractive index from the layer made of amorphous silicon, the protective layer includes a mixed film, and the mixed film includes silica, and an oxide of at least one metal selected from among tantalum, niobium, zirconium, titanium, hafnium, tungsten, tin, cerium, chromium, nickel, and vanadium.
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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
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).
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