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Patent Searching and Data


Title:
SQUARYLIUM COMPOUND, OPTICAL FILTER, AND IMAGE ACQUISITION DEVICE
Document Type and Number:
WIPO Patent Application WO/2021/112020
Kind Code:
A1
Abstract:
The purpose of the present invention is to provide: a near-infrared absorbent dye that is superior in terms of blocking near-infrared light, in particular, blocking light with wavelengths of 600-1100 nm; an optical filter; and an image acquisition device that employs the optical filter and that is superior in terms of color reproducibility. The present invention relates to a squarylium compound represented by formula (A1). In formula (A1), each of R1, R2, R3, and Ar1 is as defined in the specification.

Inventors:
NAKAJIMA SHO (JP)
OKADA SATOSHI (JP)
YOSHIOKA SHOTA (JP)
Application Number:
PCT/JP2020/044364
Publication Date:
June 10, 2021
Filing Date:
November 27, 2020
Export Citation:
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Assignee:
AGC INC (JP)
International Classes:
G02B5/22; C09B23/01; C09B57/00; G02B5/26; G02B5/28; H01L27/146; H04N5/225
Foreign References:
DD294962A51991-10-17
DE4122563A11993-09-30
JPH03291668A1991-12-20
JPH0416853A1992-01-21
JP2017181891A2017-10-05
Other References:
KEIL, DIETMAR ET AL.: "Synthesis and characterization of 1,3-bis(2- dialkylamino-5-thienyl)-substituted squaraines - a novel class of intensively colored panchromatic dyes", DYES AND PIGMENTS, vol. 17, 1991, pages 19 - 27, XP000226923, DOI: 10.1016/0143-7208(91)85025-4
KEIL D; HARTMANN H: "Synthesis and characterization of 1,3-bis-(2- dialkylamino-5-thiazolyl)- substituted squaraines and their 2- (dialkylamino)thiazole precursors", LIEBIGS ANNALEN, vol. 6, 1995, pages 979 - 984, XP055184581
KIM, JAE JOON ET AL.: "Properties of unsymmetrical squarylium dyes containing strongly electron-donating 4'-amino-2,2'-bis(diethylamino)-4,5'-bithiazole residue", DYES AND PIGMENTS, vol. 57, 2003, pages 165 - 170, XP004418127, DOI: 10.1016/S0143-7208(02)00127-4
KEIL, DIETMAR ET AL.: "Preparation and characterisation of 2-amino-5- selenazolyl-substituted squaraines", DYES AND PIGMENTS, vol. 44, 2000, pages 149 - 153, XP004244390, DOI: 10.1016/S0143-7208(99)00080-7
Attorney, Agent or Firm:
EIKOH PATENT FIRM, P.C. (JP)
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