Near-infrared absorbing dye, optical filter, and imaging device
AssigneeAGC Inc.
InventorsShigeki HATTORI, Shota YOSHIOKA
Life of this patent
Estimating the term…
Abstract
A near-infrared absorbing dye includes a compound represented by formula (A). Each of R11 to R14 is independently a hydrogen atom, a halogen atom, a hydroxyl group, or an alkyl, aryl or alaryl group. Each of pairs R11 and R12, R12 and R13, and R13 and R14 may combine with one another to form a monocyclic ring or a polycyclic ring in which from 2 to 4 rings are fused. Each of R15 and R16 is independently an alkyl or alaryl group. R15 and R16 may combine with one another to form a cyclohetero ring having from 5 to 10 members together with the nitrogen atom.
Claims12
A near-infrared absorbing dye comprising a compound represented by formula (A):
- wherein:
- each of R11 to R14 is independently a hydrogen atom, a halogen atom, a hydroxyl group, or an alkyl, aryl or alaryl group which may include a substituent, may contain an unsaturated bond, an oxygen atom, an ester bond, an amide bond, or a thioamide bond between carbon-carbon atoms, and may include an oxygen atom, an ester bond, an amide bond, or a thioamide bond on a terminal bonded to the thiophene ring;
- each of pairs R11 and R12, R12 and R13, and R13 and R14 may combine with one another to form a monocyclic ring or a polycyclic ring in which from 2 to 4 rings are fused, and in this case, a hydrogen atom bonded to the ring may be substituted by a substituent;
- each of R15 and R16 is independently an alkyl or alaryl group which may include a substituent and may contain an unsaturated bond, an oxygen atom or a nitrogen atom between carbon-carbon atoms;
- and
- R15 and R16 may combine with one another to form a cyclohetero ring having from 5 to 10 members together with the nitrogen atom, and in this case, a hydrogen atom bonded to the ring may be substituted by a substituent.
Dependencies are inferred from the claim text.