JPH10123316A - Color filter and optical device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain an color filter having good reproducibility in a red region and having excellent optical characteristics and durability by coloring a pattern with a specified chromium complex salt dye. SOLUTION: This color filter has a patterned color film on a base body, and at least one pattern is colored with 2:1 chromium complex salt dye expressed by formula. In formula, R1 is NO2 or H, R2 is a sulfone groups or SO2 NH2 , R3 is Cl or H, R4 is NO2 or H, R5 is Cl or H, R6 is Cl or H, and X is H, Na, Li, K or NH4 . Therefore, the obtd. dye has desired color characteristics (optical characteristics), light resistance, heat resistance and fixing property. Further, a red color layer having good spectral characteristics can be obtd. by compounding a gold-contg. yellow dye or gold-contg. orange dye in the compd. described above.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

[0001] The present invention relates to a color filter and an optical device. More specifically, the present invention relates to a color filter having excellent optical characteristics used for a liquid crystal display device, a color separation device, a sensor, and the like, and an optical device having the color filter.

[0002]

2. Description of the Related Art A color filter is produced by a dyeing method by coating a thin film of a synthetic resin having a transparent cationic group in the form of a stripe or mosaic (referred to as a pattern) on the surface of a substrate such as glass or a silicon wafer. Alternatively, the basic principle is to provide a film to be colored by providing a film of a protein-based natural high-molecular substance such as gelatin, casein, or glue, and to dye (color) the film with a dye. The following 3 are specific manufacturing processes for color filters.
Two schemes are known.

(1) After a film to be colored is provided on the surface of a substrate, a pattern obtained by exposing and developing through a mask is dyed to form a colored layer. Next, a non-colored protective coat film is provided on the entire surface, and a second film to be colored is provided thereon by the same operation as described above. Hereinafter, a colored layer is sequentially formed as needed. (2) After a film to be colored is provided on the surface of the substrate, a pattern obtained by exposing and developing through a mask is dyed to form a colored layer. Give A second coating to be colored is provided by a similar operation. Hereinafter, a colored layer is formed on the same substrate surface as necessary. (3) A film to be colored (film to be colored) is provided on the substrate surface. After a positive resist layer is provided thereon, exposure and development are performed through a mask to dye the pattern-exposed coating film, and then the positive resist layer is peeled off to form a colored portion. Repeat the operation after providing the positive resist layer,
The same coating film is dyed into a plurality of colors in a desired pattern.

[0004] The color filters manufactured by the above-mentioned process are usually three primary colors of R (red), G (green), B (blue) or three primary colors of Y, except for special ones. (Yellow), M (magenta), C (cyan), and (M may be omitted) colored layers. The most important characteristic required for the color filter is the optical characteristic, and the spectral characteristic of each colored layer largely determines the value of the final product.

Further, heat treatment encountered in the process of manufacturing a liquid crystal display device equipped with a color filter, for example, a sputtering process for providing a transparent electrode layer, and a high level of light applied during use as a final product. It must be resistant and must not impair certain optical properties. The dyes applied must of course also have good solubility and solubility in water and must be stable for long periods in acidic dyeing baths. Further, when a process requiring a fixing treatment is involved, it is required that the fixing treatment effect be excellent. Incidentally, protein-based natural high-molecular substances such as gelatin, casein, and glue have a cationic group and are dyed (colored) with a water-soluble anionic dye. When a photocurable synthetic resin substrate is used instead of these, by retaining a cationic group in the resin component, the resin component is dyed with a water-soluble anionic dye like a protein-based natural polymer substance. Become so.

[0006]

Many water-soluble anionic dyes have been studied in order to obtain dyes having desired color characteristics (optical characteristics) and light fastness, heat resistance and fixability.
However, a red dye satisfying all the above-mentioned properties has not been found. The color characteristics required for a desired red dye are such that the wavelength (λ _T = 50) giving 50% transmittance of the colored film dyed so that the transmitted light around 500 nm is 10% or less is 580 to 600 nm. That's what it means.

[0007]

As a result of various studies, the present inventors have found that a thin film layer (red dyeing) of a dyeable polymer material dyed with a 2: 1 chromium complex salt dye represented by the following general formula (1): The above-mentioned problem is solved by constituting (layer), and a red colored layer having good spectral characteristics can be obtained even when a gold-containing yellow dye or a gold-containing orange dye is blended with the compound represented by the formula (1). The inventors have found that the present invention can be obtained, and completed the present invention. That is, the present invention provides (1) a color filter in which a film colored in a pattern is placed on a substrate, at least one pattern is represented by the following general formula (1)

[0008]

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(In the formula (1), R ₁ is NO ₂ or H
R ₂ represents a sulfone group or SO ₂ NH ₂ , and R ₃ represents C 2
1 or H, R ₄ represents NO ₂ or H, R ₅ represents Cl or H, R ₆ represents Cl or H, respectively, and X represents H, Na, Li, K, or NH ₄ . (2) R ₁ is NO ₂ , R ₂ is a sulfone group, R ₃ is Cl, R ₄ is NO ₂ , R _{2 5} is Cl,
(3) the color filter of (1), wherein R ₆ is H;
The color filter according to (1) or (2), wherein the color filter is colored with a 2: 1 chromium complex dye of (1) or (2) and another dye. The color filter according to (3), wherein the ratio of the 2: 1 chromium complex dye to the other dye is 4 parts by weight or less with respect to 1 part by weight of the former.
(5) The color filter of (3) or (4), wherein the other dye is a gold-containing yellow dye or a gold-containing orange dye: (6)
The present invention relates to (5) a color filter in which the gold-containing yellow dye or the gold-containing orange dye is a chromium complex dye: (7) an optical device having the color filters of (1) to (6). In the present invention, good fixability means that the dye is eluted into the fixing solution during the fixing process, and the dye is eluted into the solvent when forming a film to be colored in the next color. This means that no contamination by the dye is observed when the dye is eluted or the next colored layer is provided.

[0010]

BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, the present invention will be described in detail.
Among the gold-containing dyes represented by the formula (1) used in the color filter of the present invention, the substituents R ₁ , R ₂ , R ₃ , R ₄ ,
Representative specific examples of preferred combinations of R ₅ , R ₆ and the counter ion X are shown in Table 1.

[0011]

Table 1 Dye No. R ₁ R ₂ R ₃ R ₄ R ₅ R ₆ X 1. NO ₂ SO ₃ H Cl NO ₂ Cl H Na 2. _{H SO 2 NH 2 Cl NO 2} Cl H Na 3. _{NO 2 SO 3 H Cl H Cl} HK 4. NO ₂ SO ₃ H Cl NO ₂ Cl H Li 5. NO ₂ SO ₃ HH NO ₂ H Cl NH ₄

The gold-containing dye represented by the formula (1) used in the color filter of the present invention is produced, for example, by the following method. That is, one of the monoazo dyes represented by the following formula (1C) or the monoazo dyes represented by the following formula (1F) is treated with a chrominating agent (for example, chromium acetate, chromic salicylic acid, etc.) in a usual manner. To obtain a 1: 1 chromium complex salt, and then reacting the 1: 1 chromium complex salt with the other monoazo dye to obtain an asymmetric 2: 1 chromium complex salt represented by the following formula (1G). A 2: 1 chromium complex dye of the formula (1) can be obtained by subjecting it to an ion exchange treatment to remove metals and, if desired, to treatment with an alkali such as sodium hydroxide, lithium hydroxide, potassium hydroxide, ammonia or the like. In the following formulas (1C), (1F) and (1G), R ₁ ,
R ₂ , R ₃ , R ₄ , R ₅ and R ₆ are the same as described above.

[0013]

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The monoazo dyes represented by the formulas (1C) and (1F) are obtained by diazotizing an amine represented by the following formula (1A) or (1D), and then diazotizing the amines represented by the following formula (1B) or (1B) It is obtained by coupling to pyrazolones represented by (1E). The following formula (1A) and formula (1)
B), R ₁ , R ₂ and R in the formulas (1D) and (1E)
₃ , R ₄ , R ₅ and R ₆ are the same as described above.

[0015]

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In the color filter of the present invention, a mixed dye of the metal-containing dye represented by the formula (1) and another dye may be used for the purpose of improving spectral characteristics in the production. When a mixed dye is used, the mixing ratio is appropriately determined according to the purpose of use. For example, the mixed dye 1 represented by the formula (1)
The other dye is preferably not more than 4 parts by weight, more preferably about 0.1 to 4 parts by weight based on parts by weight. Other dyes include gold-containing yellow
Dyes, gold-containing orange dyes and the like are preferable, and the same chromium complex dyes as the gold-containing dyes represented by the formula (1) are preferable in terms of dyeability and compatibility. Examples of other dyes include the following chromium complex dyes.

[0017]

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[0018]

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An example of the color filter of the present invention will be described with reference to the drawings. FIGS. 1A to 1H are views showing a method of manufacturing a color filter by a lamination method in which colored layers of different colors are laminated on a glass plate (basic). In FIG. 1, 1 is a glass plate, 2 is a thin film of a photo-curable resin or the like provided by spin coating, 2 'is a film to be colored by photo-curing 2 through a mask, 2 "is a colored layer, 3 is Non-stainable protective film,
Reference numeral 4 denotes a photomask, 5 denotes a second colored layer, and 6 denotes a non-staining protective film.

A photocurable composition comprising a mixture of a protein-based natural polymer such as gelatin, casein, glue and the like and a dichromate such as ammonium dichromate on a glass plate 1 or a photocurable composition having a cationic group The photocurable thin film 2 having a thickness of 0.2 to 2 μm is applied by applying a method of spin-coating, roller-coating or the like.
Is provided (FIG. 1B).

Next, the thin film is irradiated with ultraviolet light through a photomask 4 having a predetermined pattern to cure the exposed portion. (Fig. 1 (c))

Next, the unexposed portion is removed by developing with water or the like to form a colored layer 2 'having a predetermined pattern (FIG. 1 (d)).
The first colored layer 2 ″ is formed by dyeing with a dye having predetermined optical properties to obtain the color (FIG. 1 (e)).

Next, a non-staining protective film 3 is provided on the entire surface (FIG. 1).
(F)) Next, a photocurable coating layer for obtaining a layer to be colored is provided on the protective film 3 in the same manner as described above, and exposed and developed through a mask to form a predetermined pattern. A second colored layer 5 is formed by forming a layer to be formed and dyeing it with a dye having predetermined optical characteristics to obtain a second color (FIG. 1).
(G)).

Next, a non-staining protective film 6 is provided on the entire surface (FIG. 1 (h)). This operation can be repeated to form a colored layer of the third color and further a colored layer of the fourth color.

In a direct mounting type color separation color filter for a solid-state image pickup device or a color sensor, a flattening layer is provided on a silicon wafer on which a light detecting portion or the like serving as a base is provided, and the same as above. A colored layer can be formed by the operation, and the same as the non-stainable protective film can be used for the flattening layer.

In the present invention, it is essential to use a metal-containing dye represented by the above formula (1) as a dye for obtaining a primary color R (red) colored layer. Because the color characteristics of the colored layer are excellent, the resistance to heat applied in the manufacturing process of the device incorporating the color filter and the light resistance required for the final product are good, the color balanced color as a display color filter An image can be obtained, and faithful color reproducibility can be obtained as a color filter for color separation.

The film to be colored in the present invention is obtained by applying a photocurable film-forming composition capable of dyeing an anionic dye on a substrate and irradiating ultraviolet rays to cure the applied film. A protein-based natural high molecular substance such as gelatin, casein, or glue as a film to be colored will be described. Gelatin is an animal protein obtained by boiling collagen with water and irreversibly converting it to water-soluble. It is extracted from animal bones, skin, tendons, etc. by boiling it with water. Casein is a phosphoprotein that is the main component of milk. A dichromate such as ammonium bichromate is added to an aqueous solution of these natural proteins to obtain a photocurable composition, and the composition is uniformly coated on a substrate such as glass by spin coating, roller coating or the like. Irradiation with ultraviolet light after application hardens the application layer and forms a water-insoluble film. When irradiation with ultraviolet rays is performed through a mask and developed, a water-insoluble film having a predetermined pattern to be colored is formed.

Examples of the synthetic resin having a cationic group as the material to be used in the present invention include a polymer having a quaternary ammonium base as a photoreactive unsaturated group in the side chain and a photopolymerization initiation. Or a resin composition comprising a solvent and a solvent, or a resin obtained by dissolving a cationic group-containing polymer in which a photocrosslinking group such as chalcone, cinnamic acid, azide, stilbazole group, or epoxy group is introduced in advance in water or an organic solvent. A photocrosslinking agent such as a diazo compound, an azide or a diazide compound is added to a composition or a polymer obtained by polymerizing a nitrogen-containing monomer as one of the essential components, and a resin composition and the like diluted with an organic solvent may be used. . Such a photoreactive resin composition is applied to the surface of a substrate and cured by irradiation with actinic rays such as ultraviolet rays to obtain a film. When irradiation with ultraviolet rays is performed through a mask and developed, a water-insoluble film having a predetermined pattern to be colored is formed.

In order to dye (color) the above-mentioned film using the gold-containing dye represented by the formula (1), for example, an immersion method, a printing method, an ink-jet method, or the like is used. A staining method is convenient. In this case, usually 0.1 ~
The substrate provided with the coating is usually immersed in a dyeing bath at 10 to 100 ° C. in which 1 g of the gold-containing dye of the formula (1) is dissolved in 1 liter of water, more preferably 30 g or more, and more preferably 30 g or more for about 60 minutes. After removal, wash with water and dry. The red-colored film thus obtained exhibits favorable optical characteristics as a color filter.

Examples of the method for providing the non-stainable protective film include a resin composition obtained by adding a photocrosslinking agent such as a diazo compound to a negative photoresist such as an acrylic or polyvinyl alcohol polymer, or chalcone or silica. A method in which a resin composition or the like in which a photo-crosslinking group such as a film is previously introduced into an acrylic or polyvinyl alcohol-based polymer is dissolved in water or an organic solvent, applied by a coating method such as a spin coating method, and cured by irradiation with ultraviolet rays. Is adopted.

In the present invention, as a substrate on which a film to be dyed is provided, in addition to glass and plastic sheets, a silicon wafer or the like may be pretreated with a silane coupling agent or the like or provided with a flattening layer as required. Above, served for use.

The optical device having the color filter of the present invention includes, for example, an LCD (Liquid Crystal Display), a color separation device, a color sensor and the like.

[0033]

Next, the present invention will be described in more detail by way of examples.

Embodiment 1 A photocurable gelatin film is formed on the optical glass so as to have a thickness of about 0.6 μm. Subsequently, irradiation with ultraviolet rays is performed through a mask and developed, whereby a water-insoluble film having a predetermined pattern to be colored is formed. An optical glass substrate having a film on which this pattern is formed is expressed by the following formula (3)

[0035]

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In a 1.0% aqueous solution of the compound
It was immersed for 0 minutes and dyed to provide a red colored layer. When the spectral transmittance curve of the red colored portion was measured, it was 450 to 550 n.
The transmittance in the region of m was 2% or less, and the wavelength λ _T 50 showing the transmittance of 50% was 587 nm. The change in density (ΔE) after exposure to a carbon arc fade meter manufactured by Suga Test Instruments for 20 hours was 5 or less, indicating excellent light fastness. The density change (ΔE) after heating on a hot plate at 220 ° C. for 31 minutes was 3 or less, indicating extremely excellent heat resistance. Further, regarding the fixability after the fixation treatment, no elution of the dye was observed in each step, which was good. The fixing treatment is performed by first treating tannic acid 0.30% at 80 ° C. for 5 minutes, then treating tartarite 0.10% at 70 ° C. for 5 minutes, and finally treating at 180 ° C. for 5 minutes.
λmax is a value in water (the same applies hereinafter). Also lightfast,
Table 2 shows the heat resistance. The 2: 1 chromium complex dye of the formula (3) diazotizes 6-nitro-4-sulfo-2-aminophenol to give 1- (3′-chlorophenyl)-
The monoazo dye obtained by coupling with 3-methyl-5-pyrazolone is chrominated in a conventional manner to obtain a 1: 1 chromium complex, and then 6-nitro-4-chloro-2-aminophenol is added to the 1: 1 chromium complex. Diazotization,
The monoazo dye obtained by coupling with 1-phenyl-3-methyl-5-pyrazolone was reacted in a usual manner, and the reaction product was salted out to obtain a sodium salt of a chromium complex dye of the formula (3).

Embodiment 2 FIG. Acrylic anionic dye-dyeable, photosensitive resin (CFR-6, manufactured by Nippon Kayaku) on optical glass
33DHP) is spin-coated to form a film having a thickness of 0.6 μm. Subsequently, irradiation with ultraviolet rays is performed through a mask and developed, whereby a water-insoluble film having a predetermined pattern to be colored is formed. The optical glass substrate having the film on which the pattern is formed is immersed in a 0.5% aqueous solution of a 5: 5 mixture of the compound of the formula (3) and the compound of the formula (2-2) at 80 ° C. for 10 minutes. And stain
A red coloring layer was provided. When the spectral transmittance curve of this red colored layer was measured, the transmittance in the region of 450 to 550 nm was 2% or less, and the wavelength λ _T = 50% indicating a transmittance of 50% was 50.
Was 587 nm. Further, regarding the fixability after the fixation treatment, no elution of the dye was observed in each step, which was good. Table 2 shows light resistance and heat resistance.

Embodiment 3 FIG. Acrylic anionic dye-dyeable, photosensitive resin (CFR-6, manufactured by Nippon Kayaku) on optical glass
33DHP) is spin-coated to form a film having a thickness of 0.6 μm. Subsequently, irradiation with ultraviolet rays is performed through a mask and developed, whereby a water-insoluble film having a predetermined pattern to be colored is formed. The optical glass substrate having the film on which the pattern is formed is immersed in a 0.5% aqueous solution of a 7: 3 mixture of the compound of the formula (3) and the compound of the formula (2-2) at 80 ° C. for 10 minutes. And stain
A red coloring layer was provided. When the spectral transmittance curve of this red colored layer was measured, the transmittance in the region of 450 to 550 nm was 2% or less, and the wavelength λ _T = 50% indicating a transmittance of 50% was 50.
Was 587 nm. Further, regarding the fixability after the fixation treatment, no elution of the dye was observed in each step, which was good. Table 2 shows light resistance and heat resistance.

Embodiment 4 FIG. Acrylic anionic dye-dyeable, photosensitive resin (CFR-6, manufactured by Nippon Kayaku) on optical glass
33DHP) is spin-coated to form a film having a thickness of 0.6 μm. Subsequently, irradiation with ultraviolet rays is performed through a mask and developed, whereby a water-insoluble film having a predetermined pattern to be colored is formed. The optical glass substrate having the film on which the pattern is formed is immersed in a 0.5% aqueous solution of a 3: 7 mixture of the compound of the formula (3) and the compound of the formula (2-2) at 70 ° C. for 10 minutes. And stain
A red coloring layer was provided. When the spectral transmittance curve of this red colored layer was measured, the transmittance in the region of 450 to 550 nm was 2% or less, and the wavelength λ _T = 50% indicating a transmittance of 50% was 50.
Was 582 nm. Further, regarding the fixability after the fixation treatment, no elution of the dye was observed in each step, which was good. Table 2 shows light resistance and heat resistance.

Comparative Example An acrylic anion dye-dyeable and photosensitive resin (CFR-633DHP, manufactured by Nippon Kayaku) was spin-coated on optical glass to form a film having a thickness of 0.6 μm. Subsequently, irradiation with ultraviolet rays is performed through a mask and developed, whereby a water-insoluble film having a predetermined pattern to be colored is formed. An optical glass substrate having a film on which this pattern is formed is obtained by using the formula (2) described in JP-A-3-38601.
And 0.5% of a 9: 1 mixture of the compound of formula (2-4)
It was immersed in an aqueous solution at 70 ° C. for 10 minutes for dyeing to provide a red colored layer. When the spectral transmittance straight line of this red colored layer was measured, the transmittance in the region of 450 to 550 nm was:
The wavelength λ _T = 50 indicating 50% transmittance at 2% or less is 58%.
It was 3 nm. Table 2 shows light resistance, heat resistance and heat resistance. Regarding the fixability after the fixation treatment, no elution of the dye was observed in each step, and the fixation was good.

[0041]

[Table 2] Table 2 Specimen without fixation treatment With fixation treatment Light resistance Heat resistance Light resistance Heat resistance Example 1 3.11 2.15 3.44 2.74 Example 2 2.65 0.79 2.70 1.25 Example 3 2.83 1.29 2.86 1.36 Example 4 4.80 2.81 4.91 1.72 Comparison Example 5.24 2.29 5.42 4.68

Lightfastness: Carbon arc irradiation for 20 hours Displayed by concentration change ΔE Heat resistance: Hot plate 220 ° C. × 31 minutes heat treatment Displayed by concentration change ΔE

According to Table 2, when the example and the comparative example are compared, the example is superior to the comparative example in light resistance and heat resistance. From the data of the first to fourth embodiments, the formula (3)
Example 2 in which the use ratio of the dye to the other dye is 5: 5 is the most excellent in light resistance and heat resistance. Further, Example 1 in which the dye of the formula (1) is used alone is superior to Example 4 in which the use ratio is 3: 7 in light resistance. From these results, the ratio of the dye of the general formula (1) to the other dye is preferably from 10: 0 to 2: 8, more preferably 1: 0.
0: 0 to 3: 7, more preferably 10: 0 to 4:
It seems to be about 6.

Embodiment 5 FIG. A photosensitive resin film was formed in the same manner as in Example 2. Next, the complex salt dye of the formula (3) of Example 1 and the complex salt dye of the formula (2-4) were mixed at a ratio of 7: 3, and immersed in a 0.5% aqueous solution at 80 ° C. for 10 minutes. To form a red colored layer. When the spectral transmittance curve of the red colored layer was measured, the transmittance in the range of 440 to 560 nm was 2% or less, and λ _T = 50 was 585 nm. The light fastness, heat resistance and sticking properties were as good as in Example 1 above.

Embodiment 6 FIG. A film of a photosensitive resin was formed in the same manner as in Example 2. Next, it was immersed in a 0.5% aqueous solution of a compound represented by the following formula (4) at 70 ° C. for 10 minutes to perform dyeing to form a red colored layer. When the spectral transmittance curve of the red colored layer was measured, the transmittance in the range of 440 to 560 nm was 2% or less and the wavelength λ _T = 50 at which the transmittance was 50% was 50%.
Was 586 nm. The light fastness, heat resistance and sticking properties were as good as in Example 1 above.

[0046]

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[0047]

As a color filter for display, a color filter having good reproducibility in the red region and exhibiting excellent optical characteristics and durability was obtained.

[Brief description of the drawings]

FIG. 1A shows a substrate (glass plate) in FIG.
(B) shows a glass plate provided with a photocurable thin film, (c)
Is a step of irradiating the photocurable thin film with ultraviolet light through a photomask, and (d) is a step of irradiating a glass plate provided with a layer to be colored,
(E) shows a step of dyeing the layer to be colored, (f) shows a step of providing an instable protective film on the colored layer, (g) shows a step of providing a second colored layer, and (h) shows a step of forming a second colored layer. 2 shows a step of providing a non-staining protective film.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Glass plate 2 Photocurable thin film 2 'Coating to be colored 2 "1st coloring layer 3 Non-dyeing protective film 4 Photomask 5 2nd coloring layer 6 Non-staining protective film 7 Developing tank 8 Dyeing tank 9 Irradiation lamp

Claims (7)

[Claims] In a color filter having a film colored in a pattern mounted on a substrate, at least one pattern is represented by the following general formula (1): (In the formula (1), R ₁ is NO ₂ or H, R ₂ is a sulfone group or SO ₂ NH ₂ , R ₃ is Cl or H,
R ₄ is NO ₂ or H, R ₅ is Cl or H, R ₆
Represents Cl or H, respectively, and X represents H, Na, L
i, it means K, or NH _4. A) a color filter characterized by being colored with a 2: 1 chromium complex dye represented by the following formula: 2. The color filter according to claim 1, wherein R ₁ is NO ₂ , R ₂ is a sulfone group, R ₃ is Cl, R ₄ is NO ₂ , R ₅ is Cl, and R ₆ is H. 3. The color filter according to claim 1, wherein the color filter is colored with the 2: 1 chromium complex dye of claim 1 or 2 and another dye. 4. The color filter according to claim 3, wherein the ratio of the 2: 1 chromium complex dye of claim 1 or 2 to the other dye is 4 parts by weight or less with respect to 1 part by weight of the former. 5. The color filter according to claim 3, wherein the other dye is a gold-containing yellow dye or a gold-containing orange dye. 6. The color filter according to claim 5, wherein the gold-containing yellow dye or the gold-containing orange dye is a chromium complex dye. 7. An optical device having the color filter according to claim 1.