公开(公告)号：US20250051579A1

公开(公告)日：2025-02-13

申请号：US18927277

申请日：2024-10-25

Applicant: AGC Inc.

Inventor： Sayuri YAMADA ,  Kazuhiko SHIONO ,  Hiroki HOTAKA

IPC: C09B57/00 ,  C09B23/08 ,  C09B23/10 ,  G02B5/20 ,  G02B5/22 ,  G02B5/26

Abstract: The present invention relates to an optical filter containing: an absorption layer containing a near-infrared absorbing dye (A) having a maximum absorption wavelength in dichloromethane being in a wavelength range of 850 to 1,100 nm and a transparent resin; and a reflection layer formed of a dielectric multilayer film, in which the near-infrared absorbing dye (A) satisfies the following Formulae (1) to (4). AB ⁢ S 400 ⁢ ( A ) ⁢ DCM / AB ⁢ S λ ⁢ max ( A ) ⁢ DCM

公开(公告)号：US20230296818A1

公开(公告)日：2023-09-21

申请号：US18323010

申请日：2023-05-24

Applicant: AGC Inc.

Inventor： Kazuhiko SHIONO ,  Nanako NISHIMOTO ,  Sayuri YAMADA ,  Hiroki HOTAKA ,  Satoshi OKADA ,  Keigo MATSUURA

IPC: G02B5/28 ,  C09B23/08 ,  G02B5/20 ,  C09K3/00

CPC classification number: G02B5/282 ,  C09B23/083 ,  G02B5/208 ,  C09K3/00

Abstract: An optical filter includes: an absorption layer including a first near-infrared absorbing dye (D1), a second near-infrared absorbing dye (D2), and a transparent resin; and a reflection layer including a dielectric multilayer film. The dye (D1) and the dye (D2) are squarylium compounds satisfying following (1) to (3). (1) The dye (D1) has a maximum absorption wavelength λmax(D1) within a range of 680 to 730 nm, and the difference between a wavelength at which a transmittance is 80% on the shorter wavelength side than λmax(D1) when the concentration is adjusted such that a transmittance at λmax(D1) is 10%, and λmax(D1) is 100 nm or less. (2) The dye (D2) has a maximum absorption wavelength λmax(D2) within a range of 720 to 770 nm. (3) A value obtained by subtracting λmax(D1) from λmax(D2) is 30 nm or more and 85 nm or less.

公开(公告)号：US20190227208A1

公开(公告)日：2019-07-25

申请号：US16369653

申请日：2019-03-29

Applicant: AGC Inc.

Inventor： Kazuhiko SHIONO ,  Asana YOSHIOKA ,  Shoko SUZUKI ,  Hiroki HOTAKA

IPC: G02B5/20 ,  G02B5/22 ,  C09B23/10 ,  C09B57/00 ,  G02B5/08

Abstract: To provide an optical filter having shielding effects against near ultraviolet rays and near infrared rays. An optical filter comprising a transparent resin body having a single layer or multilayer structure, and containing a near ultraviolet absorbing dye (U) which is a compound represented by the following formula (U) and which has an absorption maximum at a wavelength of from 370 to 425 nm and has a molar absorptivity at the maximum absorption wavelength of at least 50,000 [L/(mol·cm)], and a near infrared absorbing dye (A) which has an absorption maximum at a wavelength of from 600 to 800 nm: In the formula (U), Y is an oxygen atom, a methylene group or a dimethylene group, R1 is a monovalent hydrocarbon group which may have a substituent, or the like, R2 to R5 are a hydrogen atom, an alkyl group, an alkoxy group or the like, and X is a bivalent group represented by any one of the formulae (X1) to (X5) or the like.

公开(公告)号：US20190161629A1

公开(公告)日：2019-05-30

申请号：US16263825

申请日：2019-01-31

Applicant: AGC Inc.

Inventor： Kazuhiko SHIONO ,  Keigo MATSUURA ,  Hiroki HOTAKA

IPC: C09D5/32 ,  C09D7/41 ,  G02B5/22 ,  H04N5/335 ,  G02B1/113 ,  C09B67/22 ,  C09B23/10 ,  C09B57/00 ,  C09D145/00 ,  H01L27/146 ,  G02B5/20 ,  G02B1/115 ,  C09D201/00 ,  C09D169/00 ,  C09D167/00 ,  G02B5/28

Abstract: An optical filter includes an absorption layer containing a near-infrared absorbing dye with an absorption characteristic in dichloromethane satisfying (i-1) to (i-3). (i-1) In an absorption spectrum of a wavelength of 400 to 800 nm, there is a maximum absorption wavelength λmax in 670 to 730 nm. (i-2) Between a maximum absorption coefficient εA of light with a wavelength of 430 to 550 nm and a maximum absorption coefficient εB of light with a wavelength of 670 to 730 nm, the following relational expression: εB/εA≥65 is established. (i-3) In a spectral transmittance curve, the difference between a wavelength λ80 with which the transmittance becomes 80% on a shorter wavelength side than the maximum absorption wavelength with the transmittance at the maximum absorption wavelength λmax set to 10% and the maximum absorption wavelength λmax is 65 nm or less.

公开(公告)号：US20240287312A1

公开(公告)日：2024-08-29

申请号：US18636316

申请日：2024-04-16

Applicant: AGC Inc.

Inventor： Shoko SUZUKI ,  Kazuhiko SHIONO ,  Sayuri YAMADA ,  Hiroki HOTAKA

IPC: C09B67/20 ,  C09B23/16 ,  G02B5/20 ,  H04N25/11

CPC classification number: C09B67/0063 ,  C09B23/166 ,  G02B5/208 ,  H04N25/11

Abstract: An optical filter, including a first absorption layer containing a near-infrared absorbing dye and a transparent resin. The optical filter also includes a reflection layer. The first absorption layer has a thickness of 0.3 μm to 10 μm. The optical filter satisfies conditions described in the disclosure. An imaging apparatus including the optical filter.

公开(公告)号：US20180356576A1

公开(公告)日：2018-12-13

申请号：US16106485

申请日：2018-08-21

Applicant: AGC INC.

Inventor： Kazuhiko SHIONO ,  Hiroyuki ARISHIMA ,  Teppei KONISHI ,  Hiroki HOTAKA

IPC: G02B5/28 ,  C09B57/00 ,  C09B67/22 ,  G02B1/04 ,  G02B5/20 ,  C08K5/3417 ,  G02B5/22

CPC classification number: G02B5/282 ,  C08K5/3417 ,  C09B57/007 ,  C09B67/0034 ,  G02B1/04 ,  G02B5/208 ,  G02B5/223 ,  C08L2666/70

Abstract: There is provided a near-infrared cut filter which has a visible light transmitting property and a near-infrared shielding property both at high levels by that its transmission spectrum has a steep inclination in the vicinity of the boundary between the visible light and the near-infrared, and which can also be sufficiently reduced in size and thickness. The near-infrared cut filter has a near-infrared absorbing layer which contains a near-infrared absorbing dye containing at least one dye in which a condensed ring structure containing at least a benzene ring and a ring having nitrogen atom is bonded to both sides of a squarylium skeleton and which have a carboxylic acid amide structure at a second position of the benzene ring (where the carboxylic acid has a substituent having 5 to 25 having one or more branches), and a transparent resin with a refractive index of 1.45 or more.