Title:
近赤外線吸収色素および吸収層
Document Type and Number:
Japanese Patent JP6904465
Kind Code:
B2
Abstract:
An optical filter includes an absorption layer which increases a visible light transmittance while having a good near-infrared blocking characteristic, and which is excellent in not only adhesiveness with respect to a layer to be abutted, but also light resistance. The optical filter includes: an absorption layer containing a near-infrared absorbing dye containing a squarylium-based dye and a transparent resin; and an inorganic or organic material in contact with the absorption layer. The squarylium-based dye has a squarylium skeleton and condensed ring structures bonded thereto respectively on both sides thereof, the condensed ring structures each including a benzene ring and a nitrogen atom as an annular atom, each benzene ring having an urethane structure in the second position.
Inventors:
Kazuhiko Shiono
Keigo Matsuura
Higashida Mori Sayuri
Hiroki Hodaka
Keigo Matsuura
Higashida Mori Sayuri
Hiroki Hodaka
Application Number:
JP2020103353A
Publication Date:
July 14, 2021
Filing Date:
June 15, 2020
Export Citation:
Assignee:
AGC Inc.
International Classes:
C09B57/00; C09B67/20; G02B5/22
Domestic Patent References:
| JP2013019991A | ||||
| JP2014059550A | ||||
| JP2014066918A | ||||
| JP1228960A |
Foreign References:
| WO2014088063A1 | ||||
| US20140061505 | ||||
| DE10109243A1 | ||||
| DE10057141A1 | ||||
| US5543086 |
Attorney, Agent or Firm:
Patent business corporation glory patent office