Title:
PIGMENT COMPOSITION, FILM, OPTICAL FILTER, IMAGE DISPLAY DEVICE, INFRARED SENSOR AND SENSOR FOR FINGERPRINT AUTHENTICATION
Document Type and Number:
Japanese Patent JP2022131095
Kind Code:
A
Abstract:
To provide a pigment composition which enables formation of a near-infrared cut filter that can achieve both shielding property of near-infrared rays at a wavelength of 680-900 nm and permeability in a visible region.SOLUTION: A pigment composition contains a squarylium-based compound (a) having a chemical structure represented by the following formula (1), and a squarylium-based compound (b) other than the squarylium-based compound (a), where the squarylium-based compound (b) has an absorption maximum at a wavelength of 680-900 nm, and a molar absorption coefficient in the absorption maximum of 1.0×105 or more. In the formula (1), R1 represents an aliphatic hydrocarbon group that may have a substituent, or an aromatic ring group that may have a substituent. The naphthalene ring in the formula (1) may have an arbitrary substituent, and may have a condensed ring. A represents an aromatic ring group that may have a substituent.SELECTED DRAWING: None
Inventors:
SATO WATARU
TANAKA YUKI
TANAKA YUKI
Application Number:
JP2021029841A
Publication Date:
September 07, 2022
Filing Date:
February 26, 2021
Export Citation:
Assignee:
MITSUBISHI CHEM CORP
International Classes:
C09B67/20; C09B23/14; C09B57/00; C09B67/22; G02B5/22
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