Provided is an optically functional film that can contribute to the widening of the color gamut of an image display apparatus, the optically functional film being suppressed in brightness reduction and being excellent in durability. The optically functional film of the present invention includes an optically functional layer having a moisture permeability of 100 g/m.sup.2 or less, wherein the optically functional layer has an absorption peak in a wavelength band in a range of from 580 nm to 610 nm, and wherein the optically functional layer contains a compound X represented by the general formula (I) or the general formula (II).

A color material dispersion liquid including a color material, which is a salt-forming compound of an organic dye with a heteropolyoxometalate, a dispersant and a solvent, wherein the organic dye is at least one organic dye selected from the group consisting of a porphyrin dye, a tetraazaporphyrin dye, a phthalocyanine dye and a squarylium dye, and wherein the heteropolyoxometalate is a heteropolyoxometalate which has an oxidation-reduction potential larger than −0.3 V relative to the silver/silver chloride electrode.

Provided are a resin composition including a colorant and a resin, in which the colorant contains two or more squarylium colorants represented by Formula (1) below, at least one of the squarylium colorants is a squarylium colorant having a hydrogen-bonding group, which is represented by Formula (2) below, and a colorant mixture consisting of the two or more squarylium colorants, which is included in the resin composition, has a maximum absorption wavelength in a wavelength range of 400 nm to 700 nm; an optical filter; a liquid crystal display device; a solid-state imaging element; and a colorant mixture.

##STR00001##

An optical filter includes: a resin substrate having a thickness of 20 μm or more and 110 μm or less; an absorption layer having a thickness of 0.25 μm or more and 12 μm or less and being disposed on at least one principal surface of the resin substrate; and dielectric multilayer films disposed as an outermost layer on both principal surfaces of the resin substrate. At least one of the dielectric multilayer films is a near-infrared reflection layer. The resin substrate includes a first transparent resin having a glass transition temperature of 170° C. or more and having specific optical properties. The absorption layer includes a near-infrared absorbing dye (A) and a second transparent resin having a glass transition temperature of 170° C. or more, and the near-infrared absorbing dye (A) satisfies specific optical properties in relation to the second transparent resin.

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.Math.cm)], and a near infrared absorbing dye (A) which has an absorption maximum at a wavelength of from 600 to 800 nm: ##STR00001##
In the formula (U), Y is an oxygen atom, a methylene group or a dimethylene group, R.sup.1 is a monovalent hydrocarbon group which may have a substituent, or the like, R.sup.2 to R.sup.5 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.

The present invention relates to compounds of the formula (1) and (2) which are suitable for use in electro¬nic devices, in particular organic electroluminescent devices.

A composition includes two or more near infrared absorbing compounds having an absorption maximum in a wavelength range of 650 to 1000 nm and having a solubility of 0.1 mass % or lower in water at 23° C., in which the two or more near infrared absorbing compounds include a first near infrared absorbing compound having an absorption maximum in a wavelength range of 650 to 1000 nm, and a second near infrared absorbing compound having an absorption maximum in a wavelength range of 650 to 1000 nm which is shorter than the absorption maximum of the first near infrared absorbing compound, and a difference between the absorption maximum of the first near infrared absorbing compound and the absorption maximum of the second near infrared absorbing compound is 1 to 150 nm.

Provided are a coloring composition including a green colorant, a resin, and an organic solvent, in which the green colorant includes a squarylium compound having a solubility of 30 mg/L or less in propylene glycol methyl ether acetate at 25° C.; a film formed of the coloring composition; a color filter; a method for manufacturing a color filter; a solid-state imaging element; and an image display device.

A copolymer useful as an ingredient of a colored resin composition, comprising a structural unit derived from an aromatic carboxylic acid having an ethylenically unsaturated bond, a structural unit (Ab) represented by formula (Z), and a structural unit (Ac) derived from an unsaturated compound having a cyclic ether structure having 2 to 4 carbon atoms, wherein L represents a single bond or a divalent linking group, A represents a phenyl group optionally having a substituent other than a carboxy group or a naphthyl group optionally having a substituent other than a carboxy group, R.sup.a represents a hydrogen atom, or an alkyl group having 1 to 4 carbon atoms, and a hydrogen atom contained in the alkyl group is optionally replaced by a hydroxy group.

##STR00001##

A near-infrared absorbing dye includes a compound represented by formula (A). Each of R.sup.11 to R.sup.14 is independently a hydrogen atom, a halogen atom, a hydroxyl group, or an alkyl, aryl or alaryl group. Each of pairs R.sup.11 and R.sup.12, R.sup.12 and R.sup.13, and R.sup.13 and R.sup.14 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 R.sup.15 and R.sup.16 is independently an alkyl or alaryl group. R.sup.15 and R.sup.16 may combine with one another to form a cyclohetero ring having from 5 to 10 members together with the nitrogen atom.

##STR00001##