JPWO2017111141A1 - Eyeglass lens, optical member manufacturing method, and ink - Google Patents

Abstract

An eyeglass lens or the like having a stealth mark exhibiting high discrimination is provided.
It has a stealth mark that is invisible under visible light and visible under light of a predetermined wavelength, the stealth mark is formed inside the outermost layer of the spectacle lens, and the molecular weight of the colorant forming the stealth mark is 200 or more There is a spectacle lens.

Description

  The present disclosure relates to a spectacle lens, a method for manufacturing an optical member, and ink.

  An optical member such as a spectacle lens is naturally required to have high transparency, and printing on the lens surface has certain limitations. Patent Document 1 describes a spectacle lens in which information is added to a surface, and desired information remains on the surface of the spectacle lens even after the spectacle lens is processed into a target lens shape. Has been.

JP 2000-284234 A

The present disclosure relates to the following [1] to [3].
[1] a stealth mark that is invisible under visible light and visible under light of a predetermined wavelength;
A substrate having a refractive index of 1.53 or more,
The stealth mark is formed inside the outermost layer of the spectacle lens,
The molecular weight of the color material forming the stealth mark is 200 or more.
Eyeglass lens.
[2] Step 1: a step of disposing ink containing a color material on the optical member;
Step 2: heating the optical member on which the ink is disposed;
The manufacturing method of the optical member which has a mark formed with the said color material.
[3] a colorant that forms a mark that is invisible under visible light and visible under light of a predetermined wavelength;
A penetration aid having a melting point of 20 ° C or lower and a boiling point of 130 ° C or higher and 250 ° C or lower,
The molecular weight of the coloring material is 200 or more,
The content of the penetration aid is 0.1% by mass or more and 30% by mass or less.
ink.

FIG. 1 is a schematic diagram showing the configuration of the eyeglass lens of the first embodiment. FIG. 2 is a cross-sectional view for explaining the configuration of the spectacle lens of the first embodiment. FIG. 3 is a cross-sectional view for explaining the configuration of the spectacle lens of the second embodiment. FIG. 4 is a schematic diagram showing the configuration of the spectacle lens of the third embodiment. FIG. 5 is a schematic diagram showing the configuration of the spectacle lens of the fourth embodiment.

  In the method of providing identification information to a spectacle lens described in Patent Document 1, when a mark is formed on a base material having a high refractive index by an ink jet recording method, the color material is not satisfactorily fixed on the spectacle lens, which is sufficient. In some cases, distinct discriminability could not be obtained.

An object of one embodiment of the present disclosure is to provide a spectacle lens having a stealth mark exhibiting high discrimination.
One embodiment of the present disclosure includes a stealth mark that is invisible under visible light and visible under light of a predetermined wavelength, and a substrate having a refractive index of 1.53 or more.
The stealth mark is formed inside the outermost layer of the spectacle lens,
The molecular weight of the color material forming the stealth mark is 200 or more.
It relates to eyeglass lenses.
According to the above-described embodiment, it is possible to provide a spectacle lens having a stealth mark showing high discrimination.

An object of one embodiment of the present disclosure is to provide a method for manufacturing an optical member that imparts a mark having high discrimination.
One embodiment of the present disclosure is:
Step 1: placing an ink containing a color material on the optical member;
Step 2: heating the optical member on which the ink is disposed;
The present invention relates to a method for manufacturing an optical member having a mark formed of a color material.
According to the above-described embodiment, it is possible to provide a method for manufacturing an optical member that imparts a mark having high discrimination.

An object of one embodiment of the present disclosure is to provide an ink that can give a mark having high discrimination to a spectacle lens.
One embodiment of the present disclosure is:
A coloring material that forms a mark that is invisible under visible light and visible under light of a predetermined wavelength, and a penetration aid having a melting point of 20 ° C. or lower and a boiling point of 130 ° C. or higher and 250 ° C. or lower,
The present invention relates to an ink in which the color material has a molecular weight of 200 or more and the penetration aid content is 0.1% by mass or more and 30% by mass or less.
According to the above-described embodiment, it is possible to provide an ink that can give a mark having high identification to a spectacle lens.

The optical member of the present disclosure preferably includes a stealth mark that is invisible under visible light and visible under light of a predetermined wavelength.
The stealth mark is preferably formed inside the outermost layer of the optical member, and the molecular weight of the color material forming the stealth mark is 200 or more.
In this way, by using a coloring material having a specific molecular weight, a stealth mark that exhibits high penetrability with respect to an optical member or the like and has a high discriminability even when a base material having a high refractive index is used. An optical member having is obtained.
In this specification, an optical member means a spectacle lens and other optical members. Examples of the optical member include a recording medium substrate used for spectacle lenses, contact lenses, camera lenses, prisms, optical fibers, optical disks, magnetic disks, and the like.
Hereinafter, an embodiment of the present disclosure will be described using a spectacle lens as an example.

[Glasses lens]
The eyeglass lens of the present disclosure preferably includes a stealth mark that is invisible under visible light and visible under light of a predetermined wavelength, and a base material having a refractive index of 1.53 or more.
The stealth mark is preferably formed inside the outermost surface layer of the spectacle lens, and the molecular weight of the color material forming the stealth mark is 200 or more.
As described above, by using a coloring material having a specific molecular weight, a stealth mark having high permeability to a base material and the like, and having high discrimination even when a base material having a high refractive index is used. A spectacle lens having

〔mark〕
In this specification, the “stealth mark” means a mark that is invisible under visible light and visible under light of a predetermined wavelength.
Here, under visible light means under the light of indoor lights such as sunlight, fluorescent lights, and LED lights.
In the present specification, “invisible” means a state that is completely invisible or difficult to see with human eyes.
The predetermined wavelength is not particularly limited, but is preferably an invisible light region such as an ultraviolet region having a wavelength region of 280 to 400 nm and an infrared region having a wavelength region of 0.7 to 2.5 μm.

The stealth mark or mark is formed inside the outermost layer of the spectacle lens. The inside from the outermost layer is not particularly limited as long as it is formed inside the functional layer forming the outermost layer among the functional layers formed in the spectacle lens, but it is formed in the base material or the hard coat film. It is preferable that the base material or the hard coat film is impregnated.
The stealth mark or mark is not particularly limited, and examples thereof include a one-dimensional code, a two-dimensional code, a design reference point, a frame pattern, letters such as letters and numbers, and a mark.
Examples of the one-dimensional code include a barcode. Examples of the barcode include CODE39, JAN, NW-7, and the like.
Examples of the two-dimensional code include PDF417, SuperCode, DataMatrix, MaxiCode, QRCode, and the like.

<Color material>
The molecular weight of the coloring material forming the stealth mark is preferably 200 or more from the viewpoint of improving the impregnation property of the base material and obtaining a stealth mark exhibiting high discrimination.
The molecular weight of the colorant is preferably 1,200 or less, more preferably 1,000 or less, and still more preferably 800 or less, from the viewpoint of obtaining a stealth mark exhibiting high penetrability with respect to the base material and the like and exhibiting high discrimination. More preferably, it is 700 or less, more preferably 600 or less, more preferably 500 or less, more preferably 400 or less, more preferably 300 or less. From the viewpoint of obtaining a stealth mark exhibiting high discrimination, preferably 210 or more, More preferably, it is 230 or more, More preferably, it is 250 or more.

The color material may be a pigment or a dye.
As the pigment, from the viewpoint of imparting a stealth mark, quinophthalone pigments such as quinophthalone yellow; coumarin pigments such as coumarin 545T and coumarin 324; insoluble azo pigments such as toluidine red, toluidine maroon, Hansa Yellow, benzidine yellow, and pyrazolone red; Soluble azo pigments such as lithol red, helio bordeaux, pigment scarlet and permanent red 2B; derivatives from vat dyes such as alizarin, indanthrone and thioindigo maroon; phthalocyanine pigments such as phthalocyanine blue and phthalocyanine green; quinacridone red; Quinacridone pigments such as quinacridone magenta; perylene pigments such as perylene red and perylene scarlet; isoindolinone yellow and isoindolinone Isoindolinone pigments such as range; imidazolone pigments such as benzimidazolone yellow, benzimidazolone orange and benzimidazolone red; pyranthrone pigments such as pyranthrone red and pyranthrone orange; thioindigo pigments; condensed azo pigments Thioindigo pigments; diketopyrrolopyrrole pigments; other pigments such as flavanthlon yellow, acylamide yellow, nickel azo yellow, copper azomethine yellow, perinone orange, anthrone orange, dianthraquinonyl red, dioxazine violet It can be illustrated. These can be used alone or in combination of two or more.

  As a pigment, from the viewpoint of providing a stealth mark, more specifically, C.I. I. Pigment Yellow 12, 13, 14, 17, 20, 24, 55, 74, 83, 86, 93, 97, 98, 109, 110, 117, 120, 125, 128, 137, 138, 139, 147, 148, 150, 151, 153, 154, 155, 166, 168, 180, 185, C.I. I. Pigment orange 16, 36, 43, 51, 55, 59, 61, 71, C.I. I. Pigment Red 9, 48, 49, 52, 53, 57, 97, 122, 123, 149, 168, 175, 176, 177, 180, 192, 202, 209, 215, 216, 217, 220, 223, 224, 226, 227, 228, 238, 240, 254, 255, 272, C.I. I. Pigment violet 19, 23, 29, 30, 37, 40, 50, C.I. I. Pigment blue 15, 15: 1, 15: 3, 15: 4, 15: 6, 22, 60, 64, C.I. I. Pigment green 7, 36, C.I. I. Pigment brown 23, 25, 26, and the like. These can be used alone or in combination of two or more.

  As the dye, from the viewpoint of imparting a stealth mark, specifically, C.I. I. Basic Red 1, 2, 9, 12, 13, 14, 17, C.I. I. Basic violet 1, 3, 7, 10, 11: 1, 14, C.I. I. Acid Red 51, 52, 92, 94, C.I. I. Direct Yellow 11, 24, 26, 87, 100, 132, 147, C.I. I. Direct Orange 26, 29, 29: 1, 46, C.I. I. Direct Red 1, 13, 17, 239, 240, 242, 254, C.I. I. Fluorocent Brightener 91, 162: 1 etc. are mentioned. These can be used alone or in combination of two or more.

In addition, examples of the coloring material include metal complexes having a rare earth element such as europium or samarium as a luminescent center and a ligand having a large number of π electrons as a counter ion. Among these, a europium complex having a large emission intensity is particularly preferable.
Thenoyltrifluoroacetone, naphthoyltrifluoroacetone, benzoyltrifluoroacetone, methylbenzoyltrifluoroacetone, furoyltrifluoroacetone, pivaloyltrifluoroacetone, hexafluoroacetylacetone, trifluoroacetylacetone, fluoroacetylacetone, heptafluorobutanoylpivalo The europium complex which used ilmethane etc. as a ligand is mentioned. These can be used alone or in combination of two or more.

  The colorant is preferably at least one selected from the group consisting of a quinophthalone pigment, a coumarin pigment, and a naphthalimide dye, more preferably a quinophthalone pigment, from the viewpoint of enhancing permeability and enhancing discrimination. And at least one selected from the group consisting of coumarin pigments, more preferably quinophthalone pigments, and still more preferably C.I. I. Pigment Yellow 138, more preferably B-type quinophthalone.

  Commercially available coloring materials include Fuji Dye Kogyo Co., Ltd., B-type quinophthalone pigment (CI Pigment Yellow 138), Nippon Kayaku Co., Ltd., trade name “Mikawhite” ATN conc, KTS extraconc, Nippon Kayaku Product name “Kayalight” B, OS, OSN, manufactured by Corporation.

[Layer structure]
The spectacle lens includes a base material and a functional layer.
Examples of the functional layer include a hard coat film, a primer layer, an interference fringe suppressing layer, a polarizing layer, and a photochromic layer. If necessary, an antireflection film, a water repellent film, an ultraviolet absorption film, an infrared absorption film, a photochromic film, an antistatic film, an antifogging film, and the like may be further provided on the hard coat film. For these functional layers, a known technique relating to spectacle lenses can be applied.
Among these, the spectacle lens preferably has a base material, a hard coat film, and an antireflection film.
The stealth mark is preferably formed inside the base material side of the antireflection film in order to prevent the stealth mark on the spectacle lens from being erased during distribution, processing, or use by the end user. “Inside the base material” means on the layer provided on the base material side of the antireflection film or the inside of these layers.

<Base material>
The material of the substrate may be plastic or inorganic glass. Examples of the material of the base material include polyurethane-based materials such as polythiourethane resins and polyurethane resins; epithio-based materials such as polysulfide resins; polycarbonate-based materials; diethylene glycol bisallyl carbonate-based materials.
The material of the substrate is preferably at least one selected from a polythiourethane resin, a polysulfide resin, and a polyurethane resin, more preferably at least one selected from the group consisting of a polythiourethane resin and a polysulfide resin. It is.
As a base material, a colorless thing is normally used, However, The colored thing in the range which does not impair transparency can also be used.

The substrate may be either a finish lens or a semi-finish lens.
The surface shape of the substrate is not particularly limited, and may be any one of a flat surface, a convex surface, a concave surface, and the like.
The spectacle lens of the present disclosure may be any of a single focus lens, a multifocal lens, a progressive power lens, and the like. For example, as an example, for a progressive-power lens, normally, a near portion region (near portion) and a progressive portion region (intermediate region) are included in the above lower region, and a far portion region (distance portion). Is included in the upper region.

Although the thickness and diameter of a base material are not specifically limited, Thickness is about 1-30 mm normally and a diameter is about 50-100 mm normally.
The refractive index ne of the substrate is preferably 1.53 or more, more preferably 1.55 or more, more preferably 1.58 or more, still more preferably 1.60 or more, still more preferably 1.67 or more, still more preferably. 1.70 or more, preferably 1.80 or less.

<Hard coat film>
The hard coat film is obtained, for example, by curing a curable composition containing inorganic oxide particles and a silicon compound. The curable composition preferably further comprises a polyfunctional epoxy compound.

Examples of the inorganic oxide particles include particles of tungsten oxide, zinc oxide, silicon oxide, aluminum oxide, titanium oxide, zirconium oxide, tin oxide, beryllium oxide, antimony oxide, and the like. These can be used alone or in combination of two or more. Also, composite oxide particles of two or more inorganic oxides can be used. Among these, silicon oxide is preferable.
The content of the inorganic oxide particles is preferably 20% by mass or more, more preferably 30% by mass or more, still more preferably 40% by mass or more, preferably 80% by mass or less, in the solid content of the curable composition. Preferably it is 70 mass% or less, More preferably, it is 60 mass% or less.

The silicon compound is preferably a silicon compound having a hydrolyzable group such as an alkoxy group, and more preferably a silane coupling agent having an organic group bonded to a silicon atom and a hydrolyzable group. The organic group bonded to the silicon atom is preferably an organic group having a functional group such as an epoxy group such as a glycidoxy group, a vinyl group, a methacryloxy group, an acryloxy group, a mercapto group, an amino group, and a phenyl group, An organic group having an epoxy group is more preferable.
As a commercial item of a silane coupling agent, for example, manufactured by Shin-Etsu Chemical Co., Ltd., trade name, KBM-303, KBM-402, KBM-403, KBE402, KBE403, KBM-1403, KBM-502, KBM-503, KBE-502, KBE-503, KBM-5103, KBM-602, KBM-603, KBM-903, KBE-903, KBE-9103, KBM-573, KBM-575, KBM-9659, KBE-585, KBM- 802, KBM-803, KBE-846, KBE-9007 and the like.
The content of the silicon compound is preferably 5% by mass or more, more preferably 10% by mass or more, still more preferably 15% by mass or more, and preferably 80% by mass or less, preferably in the solid content of the curable composition. It is 70 mass% or less, More preferably, it is 60 mass% or less.

The polyfunctional epoxy compound is a polyfunctional epoxy compound containing two or more epoxy groups in one molecule, and more preferably a polyfunctional epoxy compound containing two or three epoxy groups in one molecule.
Commercially available polyfunctional epoxy compounds are manufactured by Nagase ChemteX Corporation, trade names “Denacol” series EX-201, EX-211, EX-212, EX-252, EX-313, EX-314, EX-321. , EX-411, EX-421, EX-512, EX-521, EX-611, EX-612, EX-614, EX-614B, and the like.
The content of the polyfunctional epoxy compound is preferably 0% by mass or more, more preferably 10% by mass or more, still more preferably 15% by mass or more, preferably 50% by mass or less, in the solid content of the curable composition. More preferably, it is 40 mass% or less, More preferably, it is 30 mass% or less.

The above-mentioned curable composition can be prepared by mixing optional components such as an organic solvent, a surfactant (leveling agent), and a curing catalyst, if necessary, in addition to the components described above.
The above-mentioned hard coat film can be formed by applying a curable composition on a substrate and performing a curing treatment (thermal curing, photocuring, etc.). As a means for applying the curable composition, a conventionally performed method such as a dipping method, a spin coating method, or a spray method can be applied. The curing treatment is usually performed by heating for a curable composition containing a polyfunctional epoxy compound. The heat-curing treatment can be performed, for example, by placing a lens coated with the above-described curable composition in an environment with an ambient temperature of 50 to 150 ° C. for about 30 minutes to 3 hours.

<Primer layer>
In addition to the above, a primer layer may be provided between the substrate and the hard coat film.
The primer layer can be formed of an aqueous resin composition containing at least one resin particle selected from the group consisting of polyurethane resin, acrylic resin, epoxy resin and the like.
As the above-mentioned aqueous resin composition, a commercially available aqueous urethane can be used as it is or after being diluted with an aqueous solvent as necessary. Examples of commercially available water-based polyurethanes include the product name “Evaphanol” series manufactured by Nikka Chemical Co., Ltd., the product name “Superflex” series manufactured by Daiichi Kogyo Seiyaku Co., Ltd., and the product name “ADEKA” manufactured by ADEKA Corporation. "Bontiter" series, Mitsui Chemicals' brand name "Olestar" series, Dainippon Ink & Chemicals Ltd. brand name "Bondic" series, brand name "Hydran" series, Bayer brand name ""Impranil" series, product name "Sofranate" series manufactured by Soflan Japan, product name "Poise" series manufactured by Kao Corporation, product name "Samprene" series manufactured by Sanyo Chemical Industries, Ltd., Hodogaya Chemical Co., Ltd. Product name “IZELUX” series, product name “NEOLETS” Leeds, and the like.
An aqueous resin layer can be formed as a primer layer by applying and drying the aqueous resin composition on the surface of the substrate.

<Antireflection film>
An antireflection film may be provided on the hard coat film. The antireflection film has, for example, a configuration in which low refractive index layers and high refractive index layers are alternately arranged. The number of layers of the antireflection film is preferably 4 to 10 layers, more preferably 5 to 8 layers.

The refractive index of the low refractive index layer is 500 to 550 nm, preferably 1.35 to 1.80, more preferably 1.45 to 1.50. The low refractive index layer is made of an inorganic oxide, preferably silicon oxide.
The refractive index of the high refractive index layer is 500 to 550 nm, preferably 1.90 to 2.60, and more preferably 2.00 to 2.40. The high refractive index layer is made of, for example, an inorganic oxide. The inorganic oxide used in the high refractive index layer is preferably at least one selected from the group consisting of zirconium oxide, tantalum oxide, yttrium oxide, titanium oxide, niobium oxide and aluminum oxide, more preferably zirconium oxide and It is at least one selected from the group consisting of tantalum oxide.
An antireflection layer (AR layer) can be formed by alternately laminating the layers described in the table on the hard coat film by vacuum vapor deposition.

[Structure of eyeglass lenses]
Hereinafter, preferred embodiments of the present disclosure will be described in detail with reference to the drawings. In addition, the same code | symbol is attached | subjected to the same or an equivalent part in a figure, and the description is not repeated.
FIG. 1 is a schematic diagram showing the configuration of the eyeglass lens of the first embodiment. The spectacle lens 1 has a stealth mark 2 formed near the center of the spectacle lens. The stealth mark 2 is a two-dimensional code formed inside the outermost layer of the spectacle lens.
FIG. 2 is a cross-sectional view for explaining the configuration of the spectacle lens of the first embodiment. The spectacle lens 1 of this embodiment includes a base material 3, a hard coat film 4, an antireflection film 5, and a stealth mark 2 formed by impregnating the base material 3 with a color material.

  Since the stealth mark 2 is impregnated in the base material 3, it is less visible under visible light than a mark formed by simply printing by an ink jet recording method. Further, since the stealth mark 2 is impregnated, it is difficult to disappear even when the surface of the spectacle lens is wiped or processed. In the spectacle lens of the present embodiment, for example, the stealth mark 2 becomes visible by irradiating light having a predetermined wavelength. Therefore, when used as normal glasses, the stealth mark is not visually recognized, but becomes visible when irradiated with light having a predetermined wavelength, and the two-dimensional code can be read.

  FIG. 3 is a cross-sectional view for explaining the configuration of the spectacle lens of the second embodiment. The spectacle lens 1 of the present embodiment includes a base material 3, a hard coat film 4, an antireflection film 5, and a stealth mark 2 in which the hard coat film 4 is impregnated with a coloring material.

FIG. 4 is a schematic diagram showing the configuration of the spectacle lens of the third embodiment. The spectacle lens 1 of the third embodiment includes a design reference point 2 a and a frame pattern 2 b as the stealth mark 2.
Since the design reference point 2a cannot be visually recognized under visible light, even if the mark is printed relatively large, there is no problem in use as a normal spectacle lens. On the other hand, since the design reference point 2a can be clearly seen by irradiating light having a predetermined wavelength, it is easy to confirm the workers of the factory and the dealer, and no skill is required.
The frame pattern 2b is used to indicate a position to be cut in the target lens shape processing when creating eyeglasses. By forming the frame pattern 2b as a stealth mark, there is no problem in use as a normal spectacle lens even if the line width of the frame pattern is secured relatively large. On the other hand, since the frame pattern 2b can be clearly visually recognized by irradiating light having a predetermined wavelength, it is easy for the operator of the factory and the store to confirm, and no skill is required.

  FIG. 5 is a schematic diagram showing the configuration of the spectacle lens of the fourth embodiment. The spectacle lens 1 of the fourth embodiment has a mark as the stealth mark 2. Since it cannot be visually recognized under visible light, there is no problem in use as normal glasses. On the other hand, in a light environment having a predetermined wavelength, since the mark can be clearly seen, it functions as a source identification display and can be used for quality assurance.

[Method for producing optical member]
The manufacturing method of the optical member of the present disclosure is, for example,
Step 1: placing an ink containing a color material on the optical member;
Step 2: heating the optical member on which the ink is disposed;
Have
Examples of the optical member include a base material for spectacle lenses (hereinafter also simply referred to as “base material”) and a base material having a hard coat film. Hereinafter, a method for manufacturing a spectacle lens will be described as an example of the optical member.

The manufacturing method of the spectacle lens of the present disclosure is preferably,
Step 1: Disposing an ink containing a color material on a substrate or a substrate having a hard coat film;
Step 2: heating the substrate having the ink disposed thereon or the substrate having a hard coat film;
Have
According to the above-described embodiment, it is possible to provide a method for manufacturing a spectacle lens in which, in the heating step, a coloring material is infiltrated into a base material or a hard coat film, and a mark having high distinguishability is provided.

[Step 1: Placement of ink]
In step 1, an ink containing a color material is placed on a base material or a base material having a hard coat film, and preferably the color material and a melting point of 20 ° C. or less on the base material or the base material having a hard coat film. An ink containing a penetration aid having a boiling point of 130 ° C. or higher and 250 ° C. or lower is disposed.

  Examples of the substrate and hard coat film used in step 1 include the above-described substrate and hard coat film. In addition to the above, a primer layer may be provided between the substrate and the hard coat film, but the above-described primer layer is preferable.

<Ink>
The ink contains a coloring material, and preferably further contains a penetration aid, a high boiling point solvent, and water.
(Color material)
As the color material, the above-described color material is included.
The content of the coloring material is preferably 1% by mass or more, more preferably 2% by mass or more, further preferably 3% by mass or more, preferably 40% by mass or less, more preferably 30% by mass or less in the ink. More preferably, it is 15 mass% or less, More preferably, it is 10 mass% or less, More preferably, it is 8 mass% or less.

(Penetration aid)
The penetration aid is preferably a melting point of 20 ° C. or lower and a boiling point of 130 ° C. or higher and 250 ° C. or lower from the viewpoint of enhancing the permeability of the coloring material to the substrate or the substrate having the hard coat film. By using a penetration aid having such a melting point and boiling point, the liquid state can be maintained during the heating in step 2, and the permeability to the substrate or the like can be enhanced.
From the above viewpoint, the melting point of the penetration aid is preferably 20 ° C. or less, more preferably 10 ° C. or less, still more preferably 0 ° C. or less, still more preferably −10 ° C. or less, still more preferably −20 ° C. or less. Although a minimum is not specifically limited, Preferably it is -80 degreeC or more.
In view of the above, the boiling point of the penetration aid is preferably 130 ° C. or higher, more preferably 150 ° C. or higher, still more preferably 180 ° C. or higher, preferably 250 ° C. or lower, more preferably 230 ° C. or lower, still more preferably. It is 210 degrees C or less.

Specific examples of the penetration aid include cyclic nitrogen-containing compounds such as N-methyl-2-pyrrolidone; alkyl alcohols having 5 to 11 carbon atoms such as n-pentanol, heptanol, octanol, decanol, and undecanol. Amides such as dimethylformamide and dimethylacetamide; ketones such as methyl ethyl ketone and diethyl ketone; alkylene glycols such as propylene glycol-1-monomethyl ether-2-acetate; alkanolamines such as monoethanolamine; Examples include dimethyl-2-imidazolidinone. These can be used alone or in combination of two or more.
Among these, a cyclic nitrogen-containing compound is preferable and N-methyl-2-pyrrolidone is more preferable from the viewpoint of increasing permeability and enhancing mark distinguishability.

  The content of the penetration aid is preferably 0.1% by mass or more, more preferably 0.5% by mass or more, and still more preferably 1.0% by mass or more, from the viewpoint of increasing the permeability of the coloring material in the ink. In order to prevent roughening of the substrate surface, it is preferably 30% by mass or less, more preferably 15% by mass or less, still more preferably 10% by mass or less, still more preferably 5% by mass or less, and further preferably 3% by mass or less. It is.

(High boiling point solvent)
The ink preferably contains a high-boiling solvent having a boiling point of more than 250 ° C. and not more than 350 ° C. from the viewpoint of enhancing the permeability of the coloring material in the heating in Step 2.
The boiling point of the high boiling point solvent is preferably more than 250 ° C., more preferably 265 ° C. or more, further preferably 280 ° C. or more, preferably 350 ° C. or less, more preferably 330 ° C. or less, more preferably 300 ° C. or less. .
The melting point of the high boiling point solvent is preferably 20 ° C. or lower, more preferably 10 ° C. or lower, still more preferably 0 ° C. or lower, still more preferably −10 ° C. or lower, still more preferably −20 ° C. or lower, and the lower limit is not particularly limited. However, it is preferably −80 ° C. or higher.

Examples of the high boiling point solvent include oxyethylene or oxypropylene addition polymers such as triethylene glycol, tetraethylene glycol and tripropylene glycol; triols such as glycerin; thiodiglycol; triethylene glycol monoethyl ether and triethylene glycol. Lower alkyl glycol ethers such as monobutyl ether; lower dialkyl glycol ethers such as triethylene glycol diethyl ether, tetraethylene glycol dimethyl ether, and tetraethylene glycol diethyl ether. These can be used alone or in combination of two or more.
Among these, glycerin is preferable.
The content of the high boiling point solvent in the ink is preferably 30% by mass or more, more preferably 35% by mass or more, still more preferably 40% by mass or more, preferably 90% by mass or less, more preferably 80% by mass or less. More preferably, it is 70 mass% or less, More preferably, it is 60 mass% or less.

(water)
The ink preferably contains water from the viewpoint of viscosity adjustment.
Examples of water include tap water, pure water, and ion exchange water.
The water content is preferably 30% by mass or more, more preferably 35% by mass or more, further preferably 40% by mass or more, preferably 80% by mass or less, more preferably 70% by mass or less, in the ink. Preferably it is 60 mass% or less.

The viscosity of the ink is preferably 1 mPa · s or more, more preferably 5 mPa · s or more, still more preferably 10 mPa · s or more, preferably 40 mPa · s or less, more preferably from the viewpoint of arranging the ink by the inkjet recording method. Is 35 mPa · s or less, more preferably 30 mPa · s or less.
The viscosity of the ink is measured using an E-type viscometer (for example, trade name “RE-80L Viscometer” manufactured by Toki Sangyo Co., Ltd.) under a temperature of 25 ° C. in accordance with JIS Z 8803. be able to.

The pH of the ink is preferably 3.0 or more, more preferably 3.5 or more, still more preferably 4.0 or more, preferably 12 or less, more preferably 11 or less, and still more preferably 10 or less.
The pH of the ink can be measured using a pH meter (for example, product name: D-51, manufactured by Horiba, Ltd.) under the condition of a temperature of 25 ° C.
The ink is preferably for spectacle lenses, and more specifically is used to form marks on spectacle lenses.
The ink is preferably used for ink jet recording, and more specifically, used for forming a mark by an ink jet recording method.

<Ink arrangement method>
In step 1, the ink arrangement method can be selected according to the mark formed on the spectacle lens, and is not particularly limited. Examples thereof include an ink jet recording method, stamping, screen printing, and pad printing.
As an ink jet recording method, (i) a continuous method in which ink droplets are continuously ejected from nozzles and charge control is performed on the flying direction of the droplets, (ii) only when printing is performed. An on-demand system that presses and selectively ejects ink droplets from nozzles can be used.
Among these, the on-demand method is preferable.
Examples of the on-demand method include a piezo method and a thermal method.
These ink jet recording methods can be performed by known methods.

[Step 2: Heating]
In step 2, in order to permeate the ink, the substrate on which the ink is disposed or the substrate having a hard coat film is heated.
The heating temperature in step 2 is preferably 50 ° C. or higher, more preferably 60 ° C. or higher, and still more preferably 70 ° C. or higher from the viewpoint of penetrating the ink, and preferably 120 ° C. or lower from the viewpoint of preventing deformation of the substrate. More preferably, it is 110 degrees C or less, More preferably, it is 100 degrees C or less.

[Step 3: Ink removal]
As step 3, it is preferable to have a step of removing ink from the substrate or the substrate having a hard coat film.
From the viewpoint of reducing the visibility under visible light, it is preferable to perform an operation of removing the ink remaining on the substrate or the substrate having the hard coat film after the heating in Step 2 described above. The ink can be removed by wiping or the like.

[Process 4: Cutting / Polishing]
As the process 4, when the base material used at the process 1 is a semi-finished lens, it is preferable to have a process of cutting and polishing the back surface. Depending on the prescription frequency, one side of the semi-finished lens is cut and polished. The cutting / polishing method can be performed by a known method.

[Step 5: Hard coat film formation]
As Step 5, when the substrate used in Step 1 does not have a hard coat film, a step of forming a hard coat film on the substrate may be included. The hard coat film can be formed by applying the above-described curable composition onto a substrate and performing a curing treatment (thermal curing, photocuring, etc.). The preferred embodiment is the same as described above.

[Step 6: Formation of antireflection film]
Step 6 may include a step of forming an antireflection film on the base material having the hard coat film.
An antireflection film may be provided on the hard coat film. The preferred embodiment is the same as described above.

In the present disclosure, the examples, contents, and various physical properties of each component described above may be arbitrarily combined with matters described in the detailed description of the invention as examples or preferable ranges.
Moreover, if the composition described in the Example is prepared to the composition described in the detailed description of the invention, the embodiment of the present disclosure can be carried out in the same manner as the Example over the entire composition range claimed.

  Specific examples will be described below, but the scope of the claims is not limited by the following examples.

Example 1, Reference Examples 1 and 2
[Ink preparation]
Each component shown in Table 1 below was mixed to prepare an ink. The pigment aqueous dispersion is “FSP LM 32E Orange” manufactured by Fuji Dyestuff Co., Ltd., and the solid content concentration in the dispersion is 40% by mass.

[Preparation of eyeglass lenses]
The ink shown in Table 1 is dropped on a base material having a refractive index of 1.67 (thiourethane-based plastic lens, manufactured by HOYA Corporation, “EYNOA”) to form droplets (Step 1). The mixture was heat-treated (step 2). Thereafter, the ink adhering to the surface was wiped off to obtain a spectacle lens.

[Ink discrimination evaluation 1]
Based on the following criteria, the spectacle lens was visually observed under a fluorescent lamp, and ink discrimination was evaluated.
A: The shape of the droplet can be confirmed on the surface of the spectacle lens.
B: The shape of only the outline of the droplet can be confirmed on the surface of the spectacle lens.
C: The shape of the droplet cannot be confirmed on the surface of the spectacle lens.

Reference Examples 3-5
[Ink preparation]
Each component shown in Table 2 below was mixed to prepare an ink. The pigment aqueous dispersion is “FSP LM 32E Orange” manufactured by Fuji Dyestuff Co., Ltd., and the solid content concentration in the dispersion is 40% by mass.
(Penetration aid)
P-2: UV thiasorb (UV24) (trade name, manufactured by Sun Chemical Co., Ltd., 2,2′-dihydroxy-4-methoxybenzophenone, melting point 73-75 ° C., boiling point 170-175 ° C. (1 mmHg))
P-3: DAINSORB TO (trade name, manufactured by Daiwa Kasei Co., Ltd., 2- (2 ′, 4′-dihydroxyphenyl) benzotriazole, boiling point 485 ° C. (760 mmHg))
P-4: KEMI-SORB 71 (trade name, manufactured by Chemipro Kasei Co., Ltd.)

[Preparation of eyeglass lenses]
The ink shown in Table 2 is dropped on a base material having a refractive index of 1.67 (thiourethane-based plastic lens, manufactured by HOYA Corporation, “EYNOA”) to form droplets (Step 1). The mixture was heat-treated (step 2). Evaluation was performed according to the method of [Ink discrimination evaluation 1] described above.

Examples 2-5
[Ink preparation]
Each component shown in Table 3 below was mixed to prepare an ink.
(Pigment)
C-1: KIWA-JET (trade name) pigment ink (cyan), manufactured by Kiwa Chemical Industry Co., Ltd. C-2: KIWA-JET (trade name) pigment ink (magenta), manufactured by Kiwa Chemical Industry Co., Ltd. C-3: KIWA-JET (trade name) pigment ink (yellow), manufactured by Kiwa Chemical Industry Co., Ltd. C-4: KIWA-JET (trade name) pigment ink (black), manufactured by Kiwa Chemical Industry Co., Ltd.

[Preparation of eyeglass lenses]
Base material with a refractive index of 1.60 (thiourethane plastic lens, manufactured by HOYA Corporation, “EYAS”),
Base material with refractive index of 1.67 (thiourethane plastic lens, manufactured by HOYA Corporation, “EYNOA”),
Using a substrate having a refractive index of 1.70 (polysulfide plastic lens, manufactured by HOYA Corporation, “EYRY”), the ink shown in Table 1 is dropped on each substrate to form droplets (process) 1) Heat treatment was performed at 80 ° C. for 15 minutes (step 2). Thereafter, the ink adhering to the surface was wiped off to obtain a spectacle lens. Evaluation was performed according to the method of [Ink discrimination evaluation 1] described above.

Examples 6-9
[Stealth ink preparation]
Each component shown in Table 4 below was mixed to prepare an ink.
(Pigment)
CS-1: B-type quinophthalone pigment (CI Pigment Yellow 138, FUJI SP Green 510, manufactured by Fuji Dye Industrial Co., Ltd.)
CS-2: Coumarin-based pigment (molecular weight 250-350, FUJI SP Blue 511, manufactured by Fuji Dyestuff Co., Ltd.)
(Penetration aid)
P-1: N-methyl-2-pyrrolidone (high boiling point solvent)
H-1: Glycerin

[Preparation of eyeglass lenses]
The ink shown in Table 4 is dropped on a base material (thiourethane plastic lens, manufactured by HOYA Corporation, “EYNOA”) having a refractive index of 1.67 to form droplets (Step 1). At 15 ° C. for 15 minutes (step 2). Thereafter, the ink adhering to the surface was wiped off to obtain a spectacle lens. In any case, the shape of the droplets could not be confirmed under visible light.

[Ink discrimination evaluation 2]
Based on the following criteria, the spectacle lens was visually observed under the irradiation of ultraviolet light of 280 to 400 nm, and ink discrimination was evaluated.
A: The shape of the droplet can be confirmed on the surface of the spectacle lens.
B: The shape of only the outline of the droplet can be confirmed on the surface of the spectacle lens.
C: The shape of the droplet cannot be confirmed on the surface of the spectacle lens.

(Rough surface evaluation)
The spectacle lens was visually observed under a fluorescent lamp according to the following criteria, the surface of the spectacle lens was observed, and surface roughness was evaluated based on the following criteria.
A: Surface roughness cannot be confirmed on the surface of the spectacle lens.
B: Surface roughness can be confirmed only on the outline of the droplet on the surface of the spectacle lens.
C: Clear surface roughness can be confirmed on the spectacle lens.

Finally, this disclosure is summarized.
One embodiment of the present disclosure is:
A stealth mark that is invisible under visible light and visible under light of a predetermined wavelength, and a base material with a refractive index of 1.53 or more,
The present invention relates to a spectacle lens in which a stealth mark is formed inside the outermost layer of the spectacle lens, and the molecular weight of the color material forming the stealth mark is 200 or more.
As described above, by using a coloring material having a specific molecular weight, a stealth mark having high permeability to a base material and the like, and having high discrimination even when a base material having a high refractive index is used. A spectacle lens having

  The molecular weight of the coloring material forming the stealth mark is preferably 1,200 or less, more preferably 1,000 or less, from the viewpoint of obtaining a stealth mark exhibiting high penetrability with respect to the substrate and the like and exhibiting high discrimination. More preferably, it is 800 or less, more preferably 700 or less, more preferably 600 or less, more preferably 500 or less, further preferably 400 or less, more preferably 300 or less, from the viewpoint of obtaining a stealth mark exhibiting high discrimination. Preferably it is 210 or more, More preferably, it is 230 or more, More preferably, it is 250 or more.

  The colorant is preferably at least one selected from the group consisting of a quinophthalone pigment, a coumarin pigment, and a naphthalimide dye, more preferably a quinophthalone pigment, from the viewpoint of enhancing permeability and enhancing discrimination. And at least one selected from the group consisting of coumarin pigments, more preferably quinophthalone pigments, and still more preferably C.I. I. Pigment Yellow 138, more preferably B-type quinophthalone.

  The refractive index ne of the substrate is preferably 1.53 or more, more preferably 1.55 or more, more preferably 1.58 or more, still more preferably 1.60 or more, still more preferably 1.67 or more, still more preferably. 1.70 or more, preferably 1.80 or less.

One embodiment of the present disclosure is:
Step 1: Disposing an ink containing a coloring material and a penetration aid having a melting point of 20 ° C. or lower and a boiling point of 130 ° C. or higher and 250 ° C. or lower on an optical member;
Step 2: heating the optical member on which the ink is disposed;
The present invention relates to a method for manufacturing a spectacle lens having a mark formed of a color material.
According to one embodiment described above, in the heating step, the method of manufacturing a spectacle lens in which the penetration aid maintains a liquid state, the colorant penetrates into the optical member, and a mark having high distinguishability is provided. Can be provided.

  The refractive index ne of the substrate is preferably 1.53 or more, more preferably 1.55 or more, more preferably 1.58 or more, still more preferably 1.60 or more, still more preferably 1.67 or more, still more preferably. 1.70 or more, preferably 1.80 or less.

  The molecular weight of the coloring material is preferably 200 or more, more preferably 230 or more, still more preferably 250 or more, and preferably 1,200 from the viewpoint of showing high permeability to the substrate and the like and obtaining high discrimination. Hereinafter, more preferably 1,000 or less, still more preferably 800 or less, still more preferably 700 or less, still more preferably 600 or less, still more preferably 500 or less, still more preferably 400 or less, still more preferably 300 or less.

  The colorant is preferably at least one selected from the group consisting of a quinophthalone pigment, a coumarin pigment, and a naphthalimide dye, more preferably a quinophthalone pigment, from the viewpoint of enhancing permeability and enhancing discrimination. And at least one selected from the group consisting of coumarin pigments, more preferably quinophthalone pigments, and still more preferably C.I. I. Pigment Yellow 138, more preferably B-type quinophthalone.

The melting point of the penetration aid is preferably 10 ° C. or lower, more preferably 0 ° C. or lower, more preferably −10 ° C. or lower, more preferably −20 ° C. or lower, from the viewpoint of increasing the permeability of the optical member. Although it does not specifically limit, Preferably it is -80 degreeC or more.
The boiling point of the penetration aid is preferably 150 ° C. or higher, more preferably 180 ° C. or higher, preferably 230 ° C. or lower, more preferably 210 ° C. or lower, from the viewpoint of increasing the permeability of the colorant to the optical member.
The penetrating aid is preferably a cyclic nitrogen-containing compound, more preferably N-methyl-2-pyrrolidone, from the viewpoint of enhancing penetrability and enhancing mark discrimination.

  The content of the penetration aid is preferably 0.1% by mass or more, more preferably 0.5% by mass or more, and still more preferably 1.0% by mass or more, from the viewpoint of increasing the permeability of the coloring material in the ink. In order to prevent the surface of the optical member from being rough, it is preferably 30% by mass or less, more preferably 15% by mass or less, further preferably 10% by mass or less, further preferably 5% by mass or less, and further preferably 3% by mass or less. It is.

One embodiment of the present disclosure is:
A coloring material that forms a mark that is invisible under visible light and visible under light of a predetermined wavelength, and a penetration aid having a melting point of 20 ° C. or lower and a boiling point of 130 ° C. or higher and 250 ° C. or lower,
The present invention relates to an ink in which the color material has a molecular weight of 200 or more and the penetration aid content is 0.1% by mass or more and 30% by mass or less.
According to the embodiment described above, the penetrating aid maintains a liquid state in the heating step, and the coloring material penetrates into the spectacle lens, so that a mark having high distinguishability can be given to the spectacle lens.

  The molecular weight of the coloring material is 200 or more, more preferably 230 or more, and still more preferably 250 or more, from the viewpoint of exhibiting high penetrability with respect to the base material and the like and obtaining high discrimination. Further, the molecular weight of the coloring material is preferably 1,200 or less, more preferably 1,000 or less, and still more preferably from the viewpoint of giving a mark having high permeability to the base material and the like and having high discrimination. 800 or less, more preferably 700 or less, more preferably 500 or less, further preferably 400 or less, and further preferably 300 or less.

From the above viewpoint, the melting point of the penetration aid is preferably 20 ° C. or less, more preferably 10 ° C. or less, still more preferably 0 ° C. or less, still more preferably −10 ° C. or less, still more preferably −20 ° C. or less. Although a minimum is not specifically limited, Preferably it is -80 degreeC or more.
In view of the above, the boiling point of the penetration aid is preferably 130 ° C. or higher, more preferably 150 ° C. or higher, still more preferably 180 ° C. or higher, preferably 250 ° C. or lower, more preferably 230 ° C. or lower, still more preferably. It is 210 degrees C or less.

  The content of the penetration aid is preferably 0.1% by mass or more, more preferably 0.5% by mass or more, and still more preferably 1.0% by mass or more, from the viewpoint of increasing the permeability of the coloring material in the ink. In order to prevent roughening of the substrate surface, it is preferably 15% by mass or less, more preferably 10% by mass or less, still more preferably 5% by mass or less, and further preferably 3% by mass or less.

  The viscosity of the ink is preferably 1 mPa · s or more, more preferably 5 mPa · s or more, still more preferably 10 mPa · s or more, preferably 40 mPa · s or less, more preferably from the viewpoint of arranging the ink by the inkjet recording method. Is 35 mPa · s or less, more preferably 30 mPa · s or less.

The present disclosure includes the following.
<1a> a stealth mark that is invisible under visible light and visible under light of a predetermined wavelength;
A substrate having a refractive index of 1.53 or more,
The stealth mark is formed inside the outermost layer of the spectacle lens,
The molecular weight of the color material forming the stealth mark is 200 or more.
Eyeglass lens.
<2a> The spectacle lens according to <1a>, wherein the colorant has a molecular weight of 200 or more and 1,200 or less.
<3a> A substrate, a hard coat film, and an antireflection film are provided,
The spectacle lens according to <1a> or <2a>, in which the stealth mark is formed inside the base material with respect to the antireflection film.
<4a> The spectacle lens according to <3a>, wherein the stealth mark is formed by impregnating the base material with the coloring material.
<5a> The spectacle lens according to <3a>, wherein the stealth mark is formed by impregnating the hard coat film with the coloring material.
<6a> The spectacle lens according to any one of <1a> to <5a>, wherein the color material includes at least one selected from the group consisting of a quinophthalone pigment and a coumarin pigment.
<7a> The spectacle lens according to any one of <1a> to <6a>, wherein the stealth mark includes a one-dimensional code or a two-dimensional code.
<8a> The spectacle lens according to any one of <1a> to <7a>, wherein the stealth mark includes a design reference point.
<9a> The spectacle lens according to any one of <1a> to <8a>, wherein the stealth mark includes a frame pattern.

<1b> Step 1: a step of placing an ink containing a color material on the optical member;
Step 2: heating the optical member on which the ink is disposed;
The manufacturing method of the optical member which has a mark formed with the said color material.
<2b> The method for producing an optical member according to <1b>, wherein the ink further contains a penetration aid having a melting point of 20 ° C. or lower and a boiling point of 130 ° C. or higher and 250 ° C. or lower.
<3b> The method for producing an optical member according to <2b>, wherein the content of the penetration aid is 0.1% by mass or more and 30% by mass or less in the ink.
<4b> The method for producing an optical member according to any one of <1b> to <3b>, wherein the heating temperature in the step 2 is 50 ° C. or higher and 120 ° C. or lower.
<5b> The method for producing an optical member according to any one of <1b> to <4b>, wherein the ink further contains a high-boiling solvent having a boiling point of more than 250 ° C and not more than 350 ° C.
<6b> The method for producing an optical member according to <5b>, wherein the high-boiling solvent is glycerin.
<7b> The method for producing an optical member according to any one of <1b> to <6b>, wherein the ink further contains water.
<8b> The method for producing an optical member according to any one of <1b> to <7b>, wherein the coloring material has a molecular weight of 200 or more.
<9b> The method for producing an optical member according to any one of <1b> to <8b>, wherein the penetration aid is N-methyl-2-pyrrolidone.
<10b> The method for producing an optical member according to any one of <1b> to <9b>, wherein the color material is at least one pigment selected from the group consisting of a quinophthalone pigment and a coumarin pigment.
<11b> The method for producing an optical member according to any one of <1b> to <10b>, wherein the ink is disposed on the optical member by an inkjet recording method.
<12b> The method for producing an optical member according to any one of <1b> to <11b>, wherein the mark is a stealth mark that is invisible under visible light and visible under light of a predetermined wavelength.
<13b> The method for producing an optical member according to any one of <1b> to <12b>, wherein the optical member is a spectacle lens.
<14b> Step 3: A step of removing the ink of the optical member,
The method for producing an optical member according to any one of <1b> to <13b>, further comprising:
<15b> Step 5: The method for producing an optical member according to any one of <1b> to <14b>, further including a step of forming a hard coat film.
<16b> Step 6: The method for producing an optical member according to <15b>, further including a step of forming an antireflection film on the substrate having the hard coat film.

<1c> a colorant that forms a mark that is invisible under visible light and is visible under light of a predetermined wavelength;
A penetration aid having a melting point of 20 ° C or lower and a boiling point of 130 ° C or higher and 250 ° C or lower,
The molecular weight of the colorant is 200 or more,
The content of the penetration aid is 0.1% by mass or more and 30% by mass or less,
ink.
<2c> The ink according to <1c>, further comprising a penetration aid having a melting point of 20 ° C. or lower and a boiling point of 130 ° C. or higher and 250 ° C. or lower.
<3c> The ink according to <1c>, wherein the content of the penetration aid is 0.1% by mass or more and 30% by mass or less.
<4c> The ink according to any one of <1c> to <3c>, further containing a high-boiling solvent having a boiling point of more than 250 ° C. and not more than 350 ° C.
<5c> The ink according to <4c>, wherein the high boiling point solvent is glycerin.
<6c> The ink according to <4c> or <5c>, containing the high boiling point solvent in an amount of 30% by mass to 90% by mass.
<7c> The ink according to any one of <1c> to <6c>, further containing water.
<8c> The ink according to <7c>, containing the water in an amount of 30% by mass to 80% by mass.
<9c> The ink according to any one of <1c> to <8c>, wherein the penetration aid is N-methyl-2-pyrrolidone.
<10c> The ink according to any one of <1c> to <9c>, wherein the ink has a viscosity of 1 mPa · s to 40 mPa · s.
<11c> The ink according to any one of <1c> to <10c>, wherein the colorant is at least one pigment selected from the group consisting of a quinophthalone pigment and a coumarin pigment.
<12c> The ink according to any one of <1c> to <11c>, which is for eyeglass lenses.
<13c> The ink according to any one of <1c> to <11c>, which is for inkjet recording.

  The embodiment disclosed this time should be considered as illustrative in all points and not restrictive. The scope of the present invention is defined by the terms of the claims, rather than the description above, and is intended to include any modifications within the scope and meaning equivalent to the terms of the claims.

1: Eyeglass lens 2: Stealth mark 3: Base material 4: Hard coat film 5: Antireflection film

Claims (23)

A stealth mark that is invisible under visible light and visible under light of a predetermined wavelength;
A substrate having a refractive index of 1.53 or more,
The stealth mark is formed inside the outermost layer of the spectacle lens,
The molecular weight of the color material forming the stealth mark is 200 or more.
Eyeglass lens.   The spectacle lens according to claim 1, wherein the colorant has a molecular weight of 200 or more and 1,200 or less. A substrate, a hard coat film, and an antireflection film are provided,
The spectacle lens according to claim 1, wherein the stealth mark is formed inside the base material with respect to the antireflection film.   The spectacle lens according to claim 3, wherein the stealth mark is formed by impregnating the base material with the coloring material.   The spectacle lens according to claim 3, wherein the stealth mark is formed by impregnating the hard coat film with the coloring material.   The spectacle lens according to any one of claims 1 to 5, wherein the coloring material includes at least one selected from the group consisting of a quinophthalone pigment and a coumarin pigment.   The spectacle lens according to claim 1, wherein the stealth mark includes a one-dimensional code, a two-dimensional code, a design reference point, or a frame pattern. Step 1: placing an ink containing a color material on the optical member;
Step 2: heating the optical member on which the ink is disposed;
The manufacturing method of the optical member which has a mark formed with the said color material.   The method for producing an optical member according to claim 8, wherein the ink further contains a penetration aid having a melting point of 20 ° C. or lower and a boiling point of 130 ° C. or higher and 250 ° C. or lower.   The method for producing an optical member according to claim 9, wherein the content of the penetration aid is 0.1% by mass or more and 30% by mass or less in the ink.   The manufacturing method of the optical member in any one of Claims 8-10 whose heating temperature of the said process 2 is 50 to 120 degreeC.   The method for producing an optical member according to any one of claims 8 to 11, wherein the ink further contains a high-boiling solvent having a boiling point of more than 250 ° C and not more than 350 ° C.   The method for producing an optical member according to claim 12, wherein the high boiling point solvent is glycerin.   The method for producing an optical member according to claim 8, wherein the ink further contains water.   The method for producing an optical member according to claim 8, wherein the coloring material has a molecular weight of 200 or more.   The method for producing an optical member according to any one of claims 8 to 15, wherein the colorant is at least one pigment selected from the group consisting of a quinophthalone pigment and a coumarin pigment.   The method for producing an optical member according to claim 8, wherein the ink is disposed on the optical member by an inkjet recording method.   The method for manufacturing an optical member according to claim 8, wherein the mark is a stealth mark that is invisible under visible light and visible under light of a predetermined wavelength.   The method for manufacturing an optical member according to claim 8, wherein the optical member is a spectacle lens. Step 3: removing the ink from the optical member;
The method for producing an optical member according to claim 8, further comprising: Process 5: The manufacturing method of the optical member in any one of Claims 8-20 which further has the process of forming a hard-coat film. Process 6: The manufacturing method of the optical member of Claim 21 which further has the process of forming an anti-reflective film with respect to the base material which has the said hard-coat film. A colorant that forms a mark that is invisible under visible light and visible under light of a predetermined wavelength;
A penetration aid having a melting point of 20 ° C or lower and a boiling point of 130 ° C or higher and 250 ° C or lower,
The molecular weight of the coloring material is 200 or more,
The content of the penetration aid is 0.1% by mass or more and 30% by mass or less.
ink.

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