Optical material, lens, method for using eyeglass lenses, and method for manufacturing optical material

Abstract

To provide an optical material which reduces glare of a display and allows characters to be easily seen.SOLUTION: The optical material includes at least one type of organic coloring substance. a* is in the range from -30 to less than 0 and b* is in the range from -50 to 30 in the CIE 1976 (L*, a*, b*) color space measured at a thickness of 2 mm. The maximum absorption wavelength A is in the wavelength range from 425 nm to 465 nm, the spectral transmission of the maximum absorption wavelength A is in the range from 0.65% to 97%, the maximum absorption wavelength B is in the wavelength range from 545 nm to 595 nm, and the smallest value of the spectral transmission of the maximum absorption wavelength B is in the range of 5% to 98%.SELECTED DRAWING: None

Description

Technical Field

[0001] The present disclosure relates to an optical material, a lens, a method of using spectacle lenses, and a method of manufacturing an optical material.

Background Art

[0002] Plastic lenses have rapidly become popular in recent years as optical materials for spectacle lenses, camera lenses, etc. because they are lighter and less likely to break than inorganic lenses. As optical materials, for example, optical materials containing a polymer and an organic dye are widely known.

[0003] For example, Patent Document 1 discloses an organic glass material containing a specific wavelength absorption dye such as a tetraazaporphyrin-based metal complex compound having an absorption peak wavelength of 595 nm or 760 nm and an ultraviolet absorber.

Prior Art Documents

Patent Documents

[0004]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0005] Regarding plastic lenses, light-shielding lenses that effectively cut short-wavelength light of 500 nm or less (for example, ultraviolet light and blue light) and transmit as much of the other light as possible have also been studied. Conventionally, since the light that has been considered a cause of glare is short-wavelength blue light, yellowish light-shielding lenses are the mainstream. However, from the viewpoint of reducing glare from displays and making characters easier to see, there is room for improvement in the optical material used as the light-shielding lens.

[0006] The present disclosure has been made in view of the above, and an object thereof is to provide an optical material that reduces the glare of a display and facilitates the visual recognition of characters, a method for manufacturing the same, a lens including the same, and a method for using glasses lenses using the same.

Means for Solving the Problems

[0007] The means for solving the above problems include the following aspects. <1> Containing one or more organic dyes, in the CIE1976 (L*, a*, b*) color system measured at a thickness of 2 mm, a* is -30 to less than 0, and b* is -50 to 30 or less, a maximum absorption wavelength A exists within the range of 425 nm to 465 nm, and the minimum value of the spectral transmittance of the maximum absorption wavelength A is 0.65% or more and 97% or less, a maximum absorption wavelength B exists within the range of 545 nm to 595 nm, and the minimum value of the spectral transmittance of the maximum absorption wavelength B is 5% or more and 98% or less, an optical material. <2> The optical material according to <1>, wherein the absorption width of the absorption wavelength including the maximum absorption wavelength B is 50 nm to 150 nm. <3> The optical material according to <1> or <2>, wherein the visual transmittance at a thickness of 2 mm is 13% or more and 98% or less. <4> The optical material according to any one of <1> to <3>, wherein the difference between the maximum absorption wavelength B and the maximum absorption wavelength A is 100 nm to 180 nm. <5> The optical material according to any one of <1> to <4>, including at least one polymer selected from the group consisting of polyurethane, polythiourethane, polysulfide, polycarbonate, and poly(meth)acrylate <6> A lens including the optical material according to any one of <1> to <5>. <7> A method for using glasses lenses including the optical material according to any one of <1> to <5> in an environment where the display illuminance is 300 lux or more, with the display usage time per hour being 75% or more of the daily display usage time and the daily display usage time being 1 hour or more. <8> A method for manufacturing an optical material, including a step of designing an optical material that satisfies each condition where the visual transmittance is 3% to 90% in a scene with an indoor illuminance of 100 lux, a display illuminance of 300 lux, and an outdoor illuminance of 750 lux, the thickness is 2 mm, and in the CIE1976 (L*, a*, b*) color system, a* is less than -30 to 0 and b* is -50 to 30. <9> The method for manufacturing an optical material according to <8>, wherein the optical material is a spectacle lens. <10> The method for manufacturing an optical material according to <8> or <9>, wherein in the step of designing the optical material, an optical material that satisfies each condition is designed based on the visual function test result of a subject by a visual function test device.

Advantages of the Invention

[0008] According to the present disclosure, it is possible to provide an optical material that reduces the glare of a display and facilitates the visual recognition of characters, a manufacturing method thereof, a lens including the same, and a method of using a spectacle lens using the same.

Embodiments for Carrying Out the Invention

[0009] Hereinafter, the content of the present disclosure will be described in detail. The description of the constituent elements described below may be made based on representative embodiments of the present disclosure, but the present disclosure is not limited to such embodiments.

[0010] In the present disclosure, "~" indicating a numerical range is used to mean including the numerical values described before and after as a lower limit value and an upper limit value. In the numerical ranges described stepwise in the present disclosure, the upper limit value or the lower limit value described in one numerical range may be replaced with the upper limit value or the lower limit value of the numerical ranges described in other stepwise descriptions. Further, in the numerical ranges described in the present disclosure, the upper limit value or the lower limit value of the numerical range may be replaced with the value shown in the examples.

[0011] In the present disclosure, for a compound for which substitution or non-substitution is not specified, it may have any substituent as long as the effects in the present disclosure are not impaired. In the present disclosure, the amount of each component of the composition means the total amount of the plurality of substances present in the composition when there are a plurality of substances corresponding to each component in the layer, unless otherwise specified. In the present disclosure, a combination of preferred embodiments is a more preferred embodiment. In the present disclosure, ppm (parts per million) means ppm based on mass.

[0012] [Optical Material] The optical material of the present disclosure contains one or more organic dyes, and in the CIE1976 (L*, a*, b*) color system measured at a thickness of 2 mm, a* is -30 to less than 0, b* is -50 to 30 or less, and there is a maximum absorption wavelength A in the range of 425 nm to 465 nm, and the minimum value of the spectral transmittance of the maximum absorption wavelength A is 0.65% or more and 97% or less, and there is a maximum absorption wavelength B in the range of 545 nm to 595 nm, and the minimum value of the spectral transmittance of the maximum absorption wavelength B is 5% or more and 98% or less.

[0013] By using the optical material of the present disclosure, the glare of the display is reduced and the visibility of characters is made easy. The optical material of the present disclosure may have a bluish tint, and thereby it is presumed that the visibility of characters is made easy.

[0014] (Organic Dye) The optical material of the present disclosure contains one or more organic dyes. The organic dye is not particularly limited, and examples thereof include anthraquinone dyes, methine dyes, tetraazaporphyrin-based metal complex compounds, porphyrin-based compounds, merocyanine-based compounds, and the like. The optical material of the present disclosure may contain two or more organic dyes.

[0015] As the anthraquinone dye, commercially available products may be used, and examples thereof include Plast Blue series such as Plast Blue 8514 and Plast Blue 8590 (manufactured by Yuhon Chemical Industry Co., Ltd.), Plast Red series such as Plast Red 8320 (manufactured by Yuhon Chemical Industry Co., Ltd.), and the like. As the methine dye, commercially available products may be used. For example, Plast Yellow series such as Plast Yellow 8070 (manufactured by Arimoto Chemical Industry Co., Ltd.) can be mentioned.

[0016] Specific examples of the tetraazaporphyrin-based metal complex compound include tetra-t-butyl-tetraazaporphyrin·copper complex represented by the following formula (1a). As a commercially available product of tetra-t-butyl-tetraazaporphyrin·copper complex, PD-311S (manufactured by Yamamoto Chemical Co., Ltd.) can be mentioned.

[0017]

Chemical formula

[0018] In formula (1a), Cu represents divalent copper, and t-C4H9 represents a tertiary butyl group.

[0019] As the porphyrin-based compound or merocyanine-based compound, commercially available products may be used. For example, UVY-0026 (manufactured by Yamamoto Chemical Co., Ltd.), UVY-1023 (manufactured by Yamamoto Chemical Co., Ltd.), FDB-001 (manufactured by Yamada Chemical Industry Co., Ltd.), ABS 430 (manufactured by Luxottica), etc. can be mentioned.

[0020] The optical material of the present disclosure preferably contains an anthraquinone dye and a methine dye. Examples of the anthraquinone dye include a first dye having a maximum absorption wavelength in the range of 500 nm to 540 nm, a second dye having a maximum absorption wavelength in the range of 545 nm to 630 nm (preferably 545 nm to 595 nm), etc. Examples of the methine dye include a third dye having a maximum absorption wavelength in the range of 400 nm to 490 nm (preferably 425 nm to 465 nm). The optical material of the present disclosure may contain the first dye, the second dye, and the third dye.

[0021] The content of the organic dye contained in the optical material of the present disclosure is preferably 5 ppm to 300 ppm, and more preferably 30 ppm to 200 ppm.

[0022] When the optical material of the present disclosure contains an anthraquinone-based dye and a methine-based dye, the content of the anthraquinone-based dye (preferably, the total content of the first dye and the second dye) is preferably 5% by mass to 95% by mass, and more preferably 30% by mass to 95% by mass with respect to the total amount of the organic dyes.

[0023] When the optical material of the present disclosure contains an anthraquinone-based dye and a methine-based dye, the content of the methine-based dye (preferably, the content of the third dye) is preferably 5% by mass to 95% by mass, and more preferably 5% by mass to 30% by mass with respect to the total amount of the organic dyes.

[0024] In the optical material of the present disclosure, in the CIE1976 (L*, a*, b*) color system measured at a thickness of 2 mm, a* is -30 to less than 0, and b* is -50 to 30 or less.

[0025] In the CIE1976 (L*, a*, b*) color system, a* may be -20 or more and -5 or less, or may be -15 or more and -5 or less. In the CIE1976 (L*, a*, b*) color system, b* may be -30 or more and 20 or less, or may be 0 or more and 20 or less.

[0026] In the optical material of the present disclosure, a maximum absorption wavelength A exists within the range of 425 nm to 465 nm, and the minimum value of the spectral transmittance of the maximum absorption wavelength A is 0.65% or more and 97% or less. By satisfying this, it is excellent in blue light absorption rate, and tends to reduce the glare of the display and make it easier to visually recognize characters.

[0027] The minimum value of the spectral transmittance of the maximum absorption wavelength A may be 1% or more and 50% or less, may be 2% or more and 30% or less, or may be 5% or more and 20% or less.

[0028] In the optical material of the present disclosure, a maximum absorption wavelength B exists within the range of 545 nm to 595 nm, and the minimum value of the spectral transmittance of the maximum absorption wavelength B is 5% or more and 98% or less. By satisfying this, light between the red light or green light necessary for visual recognition of an object is less likely to be absorbed by the optical material.

[0029] The minimum value of the spectral transmittance of the maximum absorption wavelength B may be 2% or more and 50% or less, may be 5% or more and 30% or less, or may be 10% or more and 30% or less.

[0030] One maximum absorption wavelength A may exist within the range of 425 nm to 465 nm, or two or more may exist. Also, one maximum absorption wavelength B may exist within the range of 545 nm to 595 nm, or two or more may exist.

[0031] The difference between the maximum absorption wavelength B and the maximum absorption wavelength A (maximum absorption wavelength B - maximum absorption wavelength A) may be 100 nm to 180 nm, or may be 120 nm to 160 nm.

[0032] The absorption width of the absorption wavelength including the maximum absorption wavelength B may be 50 nm to 150 nm, or may be 100 nm to 150 nm, from the viewpoint that light located between red light and green light is absorbed in a wide wavelength range.

[0033] In the present disclosure, the absorption width of the absorption wavelength including the maximum absorption wavelength B means the full width at half maximum. The full width at half maximum is the full width at half value, and is represented by the distance (nm) between two intersections formed by a straight line parallel to the horizontal axis drawn at a value of 1 / 2 of the extinction coefficient value (εg) at the maximum absorption wavelength in the absorption spectrum and the absorption peak.

[0034] In the present disclosure, the minimum value of the spectral transmittance at the maximum absorption wavelength A, the minimum value of the spectral transmittance at the maximum absorption wavelength B, and the absorption width of the absorption wavelength including the maximum absorption wavelength B are the values when the spectral transmittance is measured by the method described in the examples using an optical material with a thickness of 2 mm. When the thickness of the optical material is other than 2 mm, the spectral transmittance may be measured using an optical material with a thickness other than 2 mm, and the measured value may be converted to the spectral transmittance of the optical material with a thickness of 2 mm.

[0035] (Visual transmittance) In the optical material of the present disclosure, from the viewpoint of visibility, the visual transmittance at a thickness of 2 mm is preferably 13% or more and 98% or less, more preferably 15% or more and 60% or less, and even more preferably 18% or more and 40% or less. The visual transmittance can be measured using a spectrophotometer (for example, CM-5 manufactured by Konica Minolta). When the thickness of the optical material is other than 2 mm, the visual transmittance may be measured using an optical material with a thickness other than 2 mm, and the measured value may be converted to the visual transmittance of the optical material with a thickness of 2 mm.

[0036] In the optical material of the present disclosure, for example, by appropriately adjusting the type, amount, combination, etc. of the organic dyes contained in the optical material, the type, amount, combination, etc. of additives such as ultraviolet absorbers contained in the optical material as required, the type, amount, combination, etc. of polymers contained in the optical material as required, the aforementioned maximum absorption wavelength A, maximum absorption wavelength B, minimum value of the spectral transmittance at the maximum absorption wavelength A, minimum value of the spectral transmittance at the maximum absorption wavelength B, absorption width of the absorption wavelength including the maximum absorption wavelength B, visual transmittance, etc. can be adjusted.

[0037] The thickness of the optical material of the present disclosure is not particularly limited, and may be, for example, 0.5 mm to 10 mm, 1 mm to 5 mm, or 1.5 mm to 3 mm. As an example, the thickness of the optical material of the present disclosure may be 2 mm. The thickness of the optical material means the maximum thickness.

[0038] (Polymer) The optical material of the present disclosure preferably contains a polymer. As the polymer, commercially available polymers or the like may be used, or monomers, or polymers obtained from such monomers may be used. The polymer is not particularly limited and can be used, and is preferably a transparent polymer. Hereinafter, the polymer and the monomers for obtaining the polymer will be described.

[0039] The polymer is not particularly limited, and examples thereof include polyurethane, polythiourethane, polysulfide, polycarbonate, poly(meth)acrylate, polyolefin, cyclic polyolefin, polyallyl, polyurethaneurea, polyene-polythiol polymer, ring-opening metathesis polymer, polyester, epoxy resin, and the like. One kind of polymer may be used, or two or more kinds may be used in combination.

[0040] The optical material preferably contains at least one polymer selected from the group consisting of polyurethane, polythiourethane, polysulfide, polycarbonate, and poly(meth)acrylate, and more preferably contains polythiourethane. These polymers are highly transparent materials and can be suitably used for optical material applications.

[0041] Polyurethane contains a structural unit derived from a polyisocyanate compound and a structural unit derived from a polyol compound. Polythiourethane contains a structural unit derived from a polyisocyanate compound and a structural unit derived from a polythiol compound.

[0042] Examples of the polyisocyanate compound include aliphatic polyisocyanate compounds such as 1,6 - hexamethylene diisocyanate, 1,5 - pentamethylene diisocyanate, 2,2,4 - trimethylhexane diisocyanate, 2,4,4 - trimethylhexamethylene diisocyanate, lysine diisocyanatomethyl ester, lysine triisocyanate, m - xylylene diisocyanate, α,α,α′,α′ - tetramethylxylylene diisocyanate, bis(isocyanatomethyl)naphthalene, mesitylene triisocyanate, bis(isocyanatomethyl)sulfide, bis(isocyanatoethyl)sulfide, bis(isocyanatomethyl)disulfide, bis(isocyanatoethyl)disulfide, bis(isocyanatomethylthio)methane, bis(isocyanatoethylthio)methane, bis(isocyanatoethylthio)ethane, bis(isocyanatomethylthio)ethane; isophorone diisocyanate, 1,3 - bis(isocyanatomethyl)cyclohexane, 1,4 - bis(isocyanatomethyl)cyclohexane, dicyclohexylmethane diisocyanate, cyclohexane diisocyanate, methylcyclohexane diisocyanate, dicyclohexyldimethylmethane isocyanate, 2,5 - bis(isocyanatomethyl)bicyclo - [2.2.1] - heptane, 2,6 - bis(isocyanatomethyl)bicyclo - [2.2.1)-alicyclic polyisocyanate compounds such as heptane, 3,8-bis(isocyanatomethyl)tricyclodecane, 3,9-bis(isocyanatomethyl)tricyclodecane, 4,8-bis(isocyanatomethyl)tricyclodecane, 4,9-bis(isocyanatomethyl)tricyclodecane; aromatic polyisocyanate compounds such as naphthalene diisocyanate, m-phenylene diisocyanate, p-phenylene diisocyanate, 2,4-tolylene diisocyanate, 2,6-tolylene diisocyanate, biphenyl diisocyanate, diphenylmethane-2,2'-diisocyanate, diphenylmethane-2,4'-diisocyanate, diphenylmethane-4,4'-diisocyanate, benzene triisocyanate, diphenyl sulfide-4,4'-diisocyanate; heterocyclic polyisocyanate compounds such as 2,5-diisocyanatothiophene, 2,5-bis(isocyanatomethyl)thiophene, 2,5-diisocyanatotetrahydrothiophene, 2,5-bis(isocyanatomethyl)tetrahydrothiophene, 3,4-bis(isocyanatomethyl)tetrahydrothiophene, 2,5-diisocyanato-1,4-dithiane, 2,5-bis(isocyanatomethyl)-1,4-dithiane, 4,5-diisocyanato-1,3-dithiolane, 4,5-bis(isocyanatomethyl)-1,3-dithiolane, etc. At least one selected from these can be used.

[0043] The polyol compound is one or more aliphatic or alicyclic alcohols. Specifically, linear or branched aliphatic alcohols, alicyclic alcohols, alcohols obtained by adding ethylene oxide, propylene oxide, ε-caprolactone to these alcohols, etc. can be mentioned, and at least one selected from these can be used.

[0044] Examples of the linear or branched aliphatic alcohol include ethylene glycol, diethylene glycol, triethylene glycol, propylene glycol, dipropylene glycol, tripropylene glycol, 1,3 - propanediol, 2,2 - dimethyl - 1,3 - propanediol, 2,2 - diethyl - 1,3 - propanediol, 1,2 - butanediol, 1,3 - butanediol, 1,4 - butanediol, 3 - methyl - 1,3 - butanediol, 1,2 - pentanediol, 1,3 - pentanediol, 1,5 - pentanediol, 2,4 - pentanediol, 2 - methyl - 2,4 - pentanediol, 3 - methyl - 1,5 - pentanediol, 1,6 - hexanediol, 2,5 - hexanediol, glycerol, diglycerol, polyglycerol, trimethylolpropane, pentaerythritol, di(trimethylolpropane), and the like.

[0045] Examples of the alicyclic alcohol include 1,2 - cyclopentanediol, 1,3 - cyclopentanediol, 3 - methyl - 1,2 - cyclopentanediol, 1,2 - cyclohexanediol, 1,3 - cyclohexanediol, 1,4 - cyclohexanediol, 4,4’ - bicyclohexanol, 1,4 - cyclohexanedimethanol, etc. At least one selected from these can be used.

[0046] Compounds obtained by adding ethylene oxide, propylene oxide, or ε - caprolactone to these alcohols may also be used. For example, ethylene oxide adducts of glycerol, trimethylolpropane, pentaerythritol, propylene oxide adducts of glycerol, trimethylolpropane, pentaerythritol, caprolactone - modified glycerol, caprolactone - modified trimethylolpropane, caprolactone - modified pentaerythritol, etc. At least one selected from these can be used.

[0047] Examples of the polythiol compound include methanedithiol, 1,2-ethanedithiol, 1,2,3-propanetrithiol, 1,2-cyclohexanedithiol, bis(2-mercaptoethyl) ether, tetrakis(mercaptomethyl) methane, diethylene glycol bis(2-mercaptoacetate), diethylene glycol bis(3-mercaptopropionate), ethylene glycol bis(2-mercaptoacetate), ethylene glycol bis(3-mercaptopropionate), trimethylolpropane tris(2-mercaptoacetate), trimethylolpropane tris(3-mercaptopropionate), trimethylolethane tris(2-mercaptoacetate), trimethylolethane tris(3-mercaptopropionate), pentaerythritol tetrakis(2-mercaptoacetate), pentaerythritol tetrakis(3-mercaptopropionate), bis(mercaptomethyl) sulfide, bis(mercaptomethyl) disulfide, bis(mercaptoethyl) sulfide, bis(mercaptoethyl) disulfide, bis(mercaptopropyl) sulfide, bis(mercaptomethylthio) methane, bis(2-mercaptoethylthio) methane, bis(3-mercaptopropylthio) methane, 1,2-bis(mercaptomethylthio) ethane, 1,2-bis(2-mercaptoethylthio) ethane, 1,2-bis(3-mercaptopropylthio) ethane, 1,2,3-tris(mercaptomethylthio) propane, 1,2,3-tris(2-mercaptoethylthio) propane, 1,2,3-tris(3-mercaptopropylthio) propane, 4-mercaptomethyl-1,8-dimercapto-3,6-dithiaoctane, 5,7-dimercaptomethyl-1,11-dimercapto-3,6,9-trithiaundecane, 4,7-dimercaptomethyl-1,11-dimercapto-3,6,9-trithiaundecane, 4,8-dimercaptomethyl-1,11-dimercapto-3,6,9-trithiaundecane, tetrakis(mercaptomethylthiomethyl) methane, tetrakis(2-mercaptoethylthiomethyl) methane, tetrakis(3-mercaptopropylthiomethyl) methane, bis(2,3-dimercaptopropyl) sulfide, 2,5-dimercaptomethyl-1,4-dithiane, 2,5-dimercapto-1,4-Dithiane, 2,5-dimercaptomethyl-2,5-dimethyl-1,4-dithiane, and esters of these with thioglycolic acid and mercaptopropionic acid, hydroxymethylsulfide bis(2-mercaptoacetate), hydroxymethylsulfide bis(3-mercaptopropionate), hydroxyethylsulfide bis(2-mercaptoacetate), hydroxyethylsulfide bis(3-mercaptopropionate), hydroxymethyldisulfide bis(2-mercaptoacetate), hydroxymethyldisulfide bis(3-mercaptopropionate), hydroxyethyldisulfide bis(2-mercaptoacetate), hydroxyethyldisulfide bis(3-mercaptopropionate), 2-mercaptoethyl ether bis(2-mercaptoacetate), 2-mercaptoethyl ether bis(3-mercaptopropionate), thiodiglycolic acid bis(2-mercaptoethyl ester), thiodipropionic acid bis(2-mercaptoethyl ester), dithiodiglycolic acid bis(2-mercaptoethyl ester), dithiodipropionic acid bis(2-mercaptoethyl ester), 1,1,3,3-tetrakis(mercaptomethylthio)propane, 1,1,2,2-tetrakis(mercaptomethylthio)ethane, 4,6-bis(mercaptomethylthio)-1,3-dithiane, tris(mercaptomethylthio)methane, tris(mercaptoethylthio)methane and other aliphatic polythiol compounds; 1,2-dimercaptobenzene, 1,3-dimercaptobenzene, 1,4-dimercaptobenzene, 1,2-bis(mercaptomethyl)benzene, 1,3-bis(mercaptomethyl)benzene, 1,4-bis(mercaptomethyl)benzene, 1,2-bis(mercaptoethyl)benzene, 1,3-bis(mercaptoethyl)benzene, 1,4-bis(mercaptoethyl)benzene, 1,3,5-trimercaptobenzene, 1,3,5-tris(mercaptomethyl)benzene, 1,3,5-tris(mercaptomethyleneoxy)benzene, 1,3,5-tris(mercaptoethyleneoxy)benzene, 2,5-toluenedithiol, 3,4-toluenedithiol, 1,5-naphthalenedithiol, 2,6-naphthalenedithiol and other aromatic polythiol compounds; 2-methylamino-4,Examples of the heterocyclic polythiol compounds include 6-dithiol-sym-triazine, 3,4-thiophenedithiol, bismuthiol, 2,5-bis(mercaptomethyl)-1,4-dithiane, 4,6-bis(mercaptomethylthio)-1,3-dithiane, 2-(2,2-bis(mercaptomethylthio)ethyl)-1,3-dithietane, etc., and at least one selected from these can be used.

[0048] The polysulfide can be obtained by a method such as ring-opening polymerization of a monomer, a polyepithio compound, a polythiane compound, etc. The composition for an optical material can contain the monomers constituting these polymers.

[0049] There is no particular limitation on the polyepithio compound and it can be used. For example, those described in Japanese Patent No. 6216383 can be used. As the polythiane compound, a metal-containing thiane compound or a non-metal thiane compound can be used. Specifically, for example, those described in Japanese Patent No. 6216383 can be used.

[0050] The polycarbonate can be obtained by reacting an alcohol with phosgene, or reacting an alcohol with chloroformate, or by transesterification of a carbonic acid diester compound. However, it is also possible to use a commercially available polycarbonate resin that is generally available. As commercially available products, the Panlite series manufactured by Teijin Chemicals Ltd. etc. can be used. The composition for an optical material of the first embodiment can contain polycarbonate as a resin material.

[0051] There is no particular limitation on the poly(meth)acrylate and it can be used. For example, those described in Japanese Patent No. 6216383 can be used.

[0052] There are no particular restrictions on the polyolefin, and it can be used as appropriate. For example, the specific examples described in Japanese Patent No. 6216383, cyclic polyolefins, olefin polymerization reactions, and polyolefin production methods can be used.

[0053] Polyallyl is produced by polymerizing at least one allyl group-containing monomer selected from allyl group-containing monomers in the presence of a known radical-generating polymerization catalyst. As allyl group-containing monomers, allyl diglycol carbonate and diallyl phthalate are generally commercially available and can be suitably used.

[0054] Polyurethane urea is a reaction product of a polyurethane prepolymer and a diamine curing agent, and a typical example is the one sold by PPG Industries, Inc. under the trademark TRIVEX. Polyurethane urea is a highly transparent material and can be suitably used.

[0055] A polyene-polythiol polymer is a polymer product obtained by addition polymerization and ethylene chain polymerization of a polyene compound having two or more ethylenic functional groups in one molecule and a polythiol compound having two or more thiol groups in one molecule.

[0056] As the polyene compound in the polyene-polythiol polymer, for example, those described in Japanese Patent No. 6216383 can be used.

[0057] A ring-opening metathesis polymer is a polymer obtained by ring-opening polymerization of cyclic olefins using a catalyst. As cyclic olefins that can be ring-opening polymerized, for example, those described in Japanese Patent No. 6216383 can be used.

[0058] The polyester is subjected to condensation polymerization in the presence of known polyester production catalysts such as Lewis acid catalysts represented by antimony and germanium compounds, organic acids, and inorganic acids. Specifically, it refers to one or more selected from polyvalent carboxylic acids containing dicarboxylic acids and their ester-forming derivatives, and one or more selected from polyhydric alcohols containing glycols, or one composed of hydroxycarboxylic acids and their ester-forming derivatives, or one composed of cyclic esters.

[0059] As the dicarboxylic acid and glycol, for example, those described in Japanese Patent No. 6216383 can be used.

[0060] As the polyester, for example, those described in Japanese Patent No. 6216383 can be used.

[0061] The epoxy resin is a polymer formed by ring-opening polymerization of an epoxy compound. As the epoxy compound, for example, those described in Japanese Patent No. 6216383 can be used.

[0062] (Additives) The optical material of the present disclosure may contain additives as other components other than the above. Examples of the above additives include polymerization catalysts, internal release agents, dyes, ultraviolet absorbers, etc. When obtaining polyurethane and polythiourethane, a polymerization catalyst may or may not be used. Examples of the internal release agent include acidic phosphate esters. Examples of the acidic phosphate esters include phosphate monoesters and phosphate diesters, and they can be used alone or in combination of two or more.

[0063] As the ultraviolet absorber, benzophenone-based ultraviolet absorbers such as 2,2'-dihydroxy-4-methoxybenzophenone, 2-hydroxy-4-acryloyloxybenzophenone, 2-hydroxy-4-acryloyloxy-5-tert-butylbenzophenone, 2-hydroxy-4-acryloyloxy-2',4'-dichlorobenzophenone; triazine-based ultraviolet absorbers such as 2-[4-[(2-hydroxy-3-dodecyloxypropyl)oxy]-2-hydroxyphenyl]-4,6-bis(2,4-dimethylphenyl)-1,3,5-triazine, 2-[4-(2-hydroxy-3-tridecyloxypropyl)oxy]-2-hydroxyphenyl]-4,6-bis(2,4-dimethylphenyl)-1,3,5-triazine, 2-[4-[(2-hydroxy-3-(2'-ethyl)hexyl)oxy]-2-hydroxyphenyl]-4,6-bis(2,4-dimethylphenyl)-1,3,5-triazine, 2,4-bis(2-hydroxy-4-butyloxyphenyl)-6-(2,4-bis-butyloxyphenyl)-1,3,5-triazine, 2-(2-hydroxy-4-[1-octyloxycarbonylethoxy]phenyl)-4,6-bis(4-phenylphenyl)-1,3,5-triazine; benzotriazole-based ultraviolet absorbers such as 2-(2H-benzotriazol-2-yl)-4-methylphenol, 2-(2H-benzotriazol-2-yl)-4-tert-octylphenol, 2-(2H-benzotriazol-2-yl)-4,6-bis(1-methyl-1-phenylethyl)phenol, 2-(2H-benzotriazol-2-yl)-4,6-di-tert-pentylphenol, 2-(5-chloro-2H-benzotriazol-2-yl)-4-methyl-6-tert-butylphenol, 2-(5-chloro-2H-benzotriazol-2-yl)-2,4-tert-butylphenol, 2,2'-methylenebis[6-(2H-benzotriazol-2-yl)-4-(1,1,3,Examples of the benzotriazole-based ultraviolet absorber include those such as 3-(tetramethylbutyl)phenol, etc., and preferably, benzotriazole-based ultraviolet absorbers such as 2-(2H-benzotriazol-2-yl)-4-tert-octylphenol and 2-(5-chloro-2H-benzotriazol-2-yl)-4-methyl-6-tert-butylphenol are mentioned. These ultraviolet absorbers can be used alone or in combination of two or more.

[0064] Commercially available products may be used as the ultraviolet absorber. Examples of the commercially available products include Tinuvin 326 (manufactured by BASF Japan Ltd.), Viosorb 583 (manufactured by Kyodo Yakuhin Co., Ltd.), etc.

[0065] The optical material of the present disclosure may contain a color tone adjuster. When the optical material contains a color tone adjuster, the content of the color tone adjuster may be 3 ppm to 50 ppm, or may be 5 ppm to 40 ppm.

[0066] Examples of the color tone adjuster include those having an absorption band in the wavelength range from orange to yellow in the visible light region and having a function of adjusting the hue of the optical material containing a polymer. Examples of the color tone adjuster include a bluing agent. Examples of the bluing agent include those having an absorption band in the wavelength range from orange to yellow in the visible light region and having a function of adjusting the hue of the optical material made of a resin material. The bluing agent may contain a substance showing blue to purple.

[0067] <Composition for optical material> The optical material of the present disclosure can be manufactured, for example, using the composition for optical material described below. The composition for optical material contains one or more organic dyes, and may contain the aforementioned polymer or the aforementioned monomer as necessary, and may also contain additives such as an ultraviolet absorber. The composition for optical material may contain an anthraquinone-based dye and a methine-based dye as the organic dye.

[0068] The content of the organic dye is preferably from 0.0001 part by mass to 0.008 part by mass, more preferably from 0.0001 part by mass to 0.006 part by mass, and still more preferably from 0.0002 part by mass to 0.004 part by mass, based on 100 parts by mass in total of the aforementioned polymer and the aforementioned monomer. The content of the organic dye means the total content of all the organic dyes contained in the composition for an optical material.

[0069] The composition for an optical material can be obtained by mixing the above components in a predetermined method. The mixing order, mixing method, etc. of each component in the composition are not particularly limited and can be carried out by known methods. Examples of known methods include, for example, a method of preparing a masterbatch containing a predetermined amount of an additive, dispersing and dissolving this masterbatch in a solvent. For example, in the case of a polyurethane resin, there is a method of dispersing and dissolving an additive in a polyisocyanate compound to prepare a masterbatch.

[0070] <Aspects of the optical material> Examples of aspects of the optical material of the present disclosure include an optical material made of a substrate, an optical material made of a substrate and a coating layer, and the like. Examples of the above substrate include a lens substrate.

[0071] Examples of the coating layer include, for example, a primer layer, a hard coat layer, an antireflection layer, an antifogging coating layer, an antifouling layer, a water-repellent layer, and the like. These coating layers can be used alone or in combination of a plurality of coating layers in a multilayer structure. When coating layers are provided on both sides, the same coating layer or different coating layers can be provided on each side.

[0072] For example, a molded body (for example, a lens substrate) can be prepared using a composition for an optical material that does not contain an organic dye, and then the molded body can be immersed in a dispersion obtained by dispersing the organic dye in water or a solvent to impregnate the molded body with the organic dye, and the molded body impregnated with the organic dye can be dried. An optical material can be prepared using the molded body thus obtained.

[0073] An optical material having such a configuration can be suitably used as a lens, preferably as an eyeglass lens.

[0074] <Use of the optical material> As uses of the optical material of the present disclosure, Lenses such as eyeglass lenses, goggles, corrective eyeglass lenses, lenses for imaging devices, Fresnel lenses for liquid crystal projectors, lenticular lenses, contact lenses, lenses for wearable devices; Sealing materials for light-emitting diodes (LEDs); optical waveguides; optical lenses; optical adhesives used for joining optical waveguides and the like; antireflection films used for optical lenses and the like; transparency coatings used for liquid crystal display device members (substrates, light guide plates, films, sheets, etc.); windshields used for automotive front glass, motorcycle helmets, etc.; transparent substrates; films attached to covers of lighting fixtures, irradiation surfaces of lighting fixtures, etc. And the like can be mentioned. Since the optical material of the present disclosure reduces the glare of the display and makes it easier to view characters, among the above, lenses are preferred, and eyeglass lenses are more preferred.

[0075] [Lens] The lens of the present disclosure includes the aforementioned optical material of the present disclosure. The lens of the present disclosure may be a lens including a lens substrate made of an optical material, or may include a coating layer on one or both surfaces of the lens substrate. The lens of the present disclosure may be any of the various lenses exemplified in the uses of the aforementioned optical material.

[0076] Specific examples of the coating layer include a primer layer, a hard coat layer, an antireflection layer, an antifogging coat layer, an antifouling layer, a water-repellent layer, and the like. These coating layers can be used alone or in combination as a multilayered structure. When coating layers are provided on both surfaces, the same coating layer or different coating layers may be provided on each surface.

[0077] These coating layers may contain known additives such as organic dyes, infrared absorbers, light stabilizers, antioxidants, etc., dyes, pigments, etc., photochromic dyes, photochromic pigments, etc., antistatic agents, and other additives for enhancing the performance of the lens. Regarding the layer for coating by application, various leveling agents for the purpose of improving coatability may be used.

[0078] The primer layer is usually formed between the hard coat layer described later and the lens substrate. The primer layer is a coating layer aimed at improving the adhesion between the hard coat layer formed thereon and the lens substrate, and in some cases, it is also possible to improve impact resistance. The primer layer only needs to have high adhesion to the obtained lens substrate. For example, a primer composition mainly composed of a urethane resin, an epoxy resin, a polyester resin, a melamine resin, or polyvinyl acetal is used to form the primer layer. In the preparation of the primer composition, a solvent that does not affect the lens substrate may be used for the purpose of adjusting the viscosity of the composition, or the solvent may not be used.

[0079] The primer layer can be formed by either a coating method or a dry method. When using the coating method, after applying the primer composition to the lens substrate by a known coating method such as spin coating or dip coating, the primer layer is formed by curing. When using the dry method, it is formed by a known dry method such as CVD method or vacuum evaporation method. When forming the primer layer, for the purpose of improving adhesion, the surface of the lens substrate may be pretreated, such as alkali treatment, plasma treatment, or ultraviolet treatment, if necessary.

[0080] The hard coat layer is a coating layer aimed at imparting functions such as scratch resistance, abrasion resistance, moisture resistance, hot water resistance, heat resistance, and weather resistance to the lens surface. For the formation of the hard coat layer, a hard coat composition containing a curable organosilicon compound and one or more oxide fine particles containing an element selected from the element group of Si, Al, Sn, Sb, Ta, Ce, La, Fe, Zn, W, Zr, In, and Ti may be used. A hard coat composition containing a curable organosilicon compound and one or more fine particles of a composite oxide containing two or more elements selected from the element group of Si, Al, Sn, Sb, Ta, Ce, La, Fe, Zn, W, Zr, In, and Ti may be used.

[0081] Preferably, the hard coat composition contains at least one selected from the group consisting of amines, amino acids, metal acetylacetonate complexes, metal organic salts, perchloric acids, salts of perchloric acids, acids, metal chlorides, and polyfunctional epoxy compounds in addition to the above components. The hard coat composition may or may not contain a solvent that does not affect the lens substrate.

[0082] The hard coat layer is usually formed by applying a hard coat composition by a known coating method such as spin coating or dip coating and then curing it. Examples of the curing method include irradiation with energy rays such as ultraviolet rays and visible light rays, and heat curing. From the viewpoint of suppressing the generation of interference fringes, the refractive index of the hard coat layer preferably has a difference in refractive index from the lens substrate in the range of ±0.1.

[0083] The antireflection layer includes an inorganic type and an organic type. The inorganic antireflection layer is formed by a dry method such as a vacuum evaporation method, a sputtering method, an ion plating method, an ion beam assist method, or a CVD method using inorganic oxides such as SiO2 and TiO2. The organic antireflection layer is formed wetly using a composition containing an organosilicon compound and silica-based fine particles having internal cavities. The antireflection layer may be formed on the hard coat layer if necessary.

[0084] The antireflection layer may be multilayer or single layer. From the perspective of effectively expressing the antireflection function, the antireflection layer is preferably multilayered. In that case, it is preferable to alternately stack a low refractive index layer and a high refractive index layer. Also, the refractive index difference between the low refractive index layer and the high refractive index layer is preferably 0.1 or more. Examples of the high refractive index layer include layers such as ZnO, TiO2, CeO2, Sb2O5, SnO2, ZrO2, Ta2O5, etc., and examples of the low refractive index layer include layers such as SiO2. When used as a single layer, the refractive index is preferably at least 0.1 or more lower than the refractive index of the hard coat layer.

[0085] On the antireflection layer, an antifogging coat layer, an antifouling layer, a water repellent layer, etc. may be formed as necessary. The method for forming the antifogging layer, antifouling layer, water repellent layer, etc. is not particularly limited, and a conventionally known method can be applied.

[0086] [Method for manufacturing an optical material] The method for manufacturing the optical material of the present disclosure includes a step of designing an optical material that satisfies each condition where the visual transmittance is 3% to 90%, a* is -30 to less than 0, and b* is -50 to 30 in the CIE1976 (L*, a*, b*) color system measured at a thickness of 2 mm under scenes of indoor illuminance of 100 lux, display illuminance of 300 lux, and outdoor illuminance of 750 lux. By satisfying the above-mentioned visual transmittance, a*, and b*, an optical material that reduces the glare of the display and enables easy visual recognition of characters can be obtained.

[0087] The visual transmittance in the above-mentioned scenes may be 13% or more and 98% or less, may be 15% or more and 60% or less, or may be 18% or more and 40% or less. The visual transmittance in the above-mentioned scenes is the visual transmittance at a thickness of 2 mm of the optical material. When the thickness of the optical material is other than 2 mm, the visual transmittance may be measured using an optical material with a thickness other than 2 mm, and the measured value may be converted to the visual transmittance of the optical material with a thickness of 2 mm.

[0088] In the manufacturing method of the present disclosure, in the CIE1976 (L*, a*, b*) color space system, a* may be -20 or more and -5 or less, or may be -15 or more and -5 or less. In the CIE1976 (L*, a*, b*) color space system, b* may be -30 or more and 20 or less, or may be 0 or more and 20 or less.

[0089] In the manufacturing method of the present disclosure, for example, by appropriately adjusting the type, amount, combination, etc. of organic dyes contained in the optical material, the type, amount, combination, etc. of additives such as ultraviolet absorbers contained in the optical material as necessary, the type, amount, combination, etc. of polymers contained in the optical material as necessary, etc., an optical material that satisfies the above conditions may be designed.

[0090] For example, in the manufacturing method of the present disclosure, an optical material may be manufactured using a composition for an optical material that contains one or more organic dyes and, as necessary, contains the above-mentioned polymer or the above-mentioned monomer or an additive such as an ultraviolet absorber. Among them, it is preferable to use an anthraquinone-based dye and a methine-based dye as the organic dye, and it is more preferable to use a first dye, a second dye, and a third dye.

[0091] In the step of designing the optical material, an optical material that satisfies the above conditions may be designed based on the visual function test results of the subject by a visual function test device.

[0092] Examples of the visual function test include a visibility test assuming discomfort glare, a visibility test assuming disability glare, etc. Discomfort glare refers to a state where the luminance difference between adjacent parts is significant, a state where discomfort is felt when the amount of light incident on the eye suddenly increases, etc. Further, disability glare refers to a state where the contrast of the retinal image decreases due to scattered light generated in the eye tissue, resulting in a decrease in visual acuity.

[0093] For example, a visibility test assuming discomfort glare may be performed by changing the brightness of the circular attention part of a visual target presented against a certain background and examining the brightness at which the subject feels glare. A visibility test assuming disability glare may be performed by changing the brightness of at least one of the Landolt ring, which is the attention part of the visual target presented against a certain background, and the ring-shaped glare part arranged outside thereof, and examining the brightness threshold at which the subject can visually recognize the direction in which the Landolt ring is missing.

[0094] Considering the visual function test results of the subject, the visual transmittance, a*, and b* may be limited within a range that satisfies each of the above conditions, and an optical material may be designed.

[0095] The uses of the optical material manufactured by the manufacturing method of the optical material of the present disclosure are the same as those described above. Among them, a lens is preferable, and an eyeglass lens is more preferable.

[0096] [Method of using eyeglass lens] The method of using the eyeglass lens of the present disclosure is a method in which an eyeglass lens including the optical material of the present disclosure is used in an environment with a display illuminance of 300 lux or more for 75% or more of the display usage time per hour and the display usage time per day is 1 hour or more. By using the eyeglass lens including the optical material of the present disclosure, the glare of the display can be reduced, making it easier to visually recognize characters and reducing eye fatigue.

[0097] Regarding the display illuminance, from the viewpoint of reducing eye fatigue, it is preferably 1000 lux or less, and more preferably 500 lux or less.

[0098] The display usage time per hour is not particularly limited and may be 75% - 100%, or may be 75% - 90%. The display usage time per day is not particularly limited and may be 2 hours - 12 hours, or may be 3 hours - 10 hours.

Example

[0099] Hereinafter, the present invention will be described more specifically by way of examples. However, the present invention is not limited to the following examples as long as it does not exceed the gist thereof. Unless otherwise specified, "parts" are based on mass.

[0100] [Example 1] (Production of lens) 0.020 g of dimethyltin(II) dichloride, 0.10 g of an internal mold release agent for MR (manufactured by Mitsui Chemicals, Inc.), 1.50 g of Viosorb 583 (manufactured by Kyodo Yakuhin Co., Ltd., ultraviolet absorber, 2-(2'-hydroxy-5'-t-octylphenyl)benzotriazole), and 46.8 g of a composition containing 2,5(6)-bis(isocyanatomethyl)-bicyclo[2.2.1]heptane were charged into a sufficiently dried flask to prepare a mixed solution (1).

[0101] Next, 0.028 g of Plast Yellow 8070 (a methine-based dye, manufactured by Yuhon Chemical Industry Co., Ltd., maximum absorption wavelength 455 nm), 0.068 g of Plast Red 8320 (an anthraquinone-based dye, manufactured by Yuhon Chemical Industry Co., Ltd., maximum absorption wavelength 520 nm), and 0.092 g of Plast Blue 8590 (an anthraquinone-based dye, manufactured by Yuhon Chemical Industry Co., Ltd., maximum absorption wavelength 595 nm) were each dissolved in 100.0 g of a composition containing 2,5(6)-bis(isocyanatomethyl)-bicyclo[2.2.1]heptane to prepare a masterbatch (1) in which Plast Yellow 8070 was dissolved, a masterbatch (2) in which Plast Red 8320 was dissolved, and a masterbatch (3) in which Plast Blue 8590 was dissolved.

[0102] Each masterbatch (1), (2), and (3) was added to the above mixture (1) at 1.00% by mass to obtain a mixture (2). The mixture (2) was stirred at 25 °C for 1 hour to completely dissolve each component to obtain a formulation. Thereafter, 23.9 g of a composition containing pentaerythritol tetrakis(3-mercaptopropionate) and 25.5 g of a composition containing 4-mercaptomethyl-1,8-dimercapto-3,6-dithiaoctane were charged into this formulation, and the resulting liquid was stirred at 25 °C for 30 minutes to prepare a homogeneous solution.

[0103] This solution was degassed at 400 Pa for 1 hour, filtered through a 1-μm PTFE (polytetrafluoroethylene) filter, and then injected into a 4C plano glass mold having a center thickness of 2 mm and a diameter of 77 mm.

[0104] This glass mold was heated from 25 °C to 120 °C over 21 hours. Thereafter, it was cooled to room temperature, and the plano lens was removed from the glass mold. The obtained plano lens was further annealed at 120 °C for 2 hours. Thereby, the lens of Example 1 was produced.

[0105] [Comparative Example 1] In the preparation of masterbatch (1), masterbatch (2), and masterbatch (3), the lens of Comparative Example 1 was produced in the same manner as in Example 1 except that the amount of Plast Yellow 8070 used was changed to 0.100 g, the amount of Plast Red 8320 used was changed to 0.285 g, and the amount of Plast Blue 8590 used was changed to 0.30 g.

[0106] (Measurement method of a*, b*) Using a spectrophotometer (CM-5 manufactured by Konica Minolta), a* and b* in the CIE1976 (L*, a*, b*) color system were measured for the lenses of Example 1 and Comparative Example 1 having a thickness of 2 mm. The results are shown in Table 1.

[0107] (Maximum absorption wavelength, transmittance at the maximum absorption wavelength, visual transmittance, and half-value width of the absorption peak of maximum absorption wavelength B) Using the ultraviolet-visible spectrophotometer UV-1800 (manufactured by Shimadzu Corporation) and the lenses of Example 1 and Comparative Example 1 with a thickness of 2 mm, the transmittance curve was measured, and the maximum absorption wavelength, the transmittance at the maximum absorption wavelength, the visual transmittance conforming to ISO 8980-3:2013, and the half-value width of the absorption peak of the maximum absorption wavelength B were determined respectively. The results are shown in Table 1.

[0108] (Contrast sensitivity evaluation) The contrast sensitivity evaluation was performed on three participants wearing the spectacle lenses equipped with the lenses of Example 1 and Comparative Example 1 with a thickness of 2 mm under the following conditions. The results are shown in Table 1. A smaller C value means that the characters are easier to see. -Test method- Visual stimulus: A Landolt ring (diameter 1.9 mm) with the minimum size at which a luminance contrast of 10:8 is visible Test conditions: In a dark room, after adaptation at each inspection luminance with vision correction and both eyes open, visual stimuli with different luminance contrasts were presented on an LED monitor at a visual distance of 1 m with white as the background, and the range of luminance contrast that could be discriminated on the two axes of "average luminance" and "luminance contrast" was investigated for each patient, and the correlation with the evaluation items was examined.

[0109] (Glare evaluation) The glare evaluation was performed on four participants wearing the spectacle lenses equipped with the lenses of Example 1 and Comparative Example 1 with a thickness of 2 mm. Specifically, the participants looked at a 750-lux display installed indoors, and a sensory evaluation of glare was performed based on the following criteria. -Evaluation criteria- A: 0 people felt glare. B: More than 1 person felt slightly glare. C: More than 1 person felt glare and it was difficult to see.

[0110]

Table 1

[0111] As shown in Table 1, the lens of Example 1 had better contrast sensitivity evaluation and glare evaluation than the lens of Comparative Example 1.

Claims

1. comprising one or more types of organic dyes, in the CIE1976 (L*, a*, b*) color system measured at a thickness of 2 mm, a* is from -30 to less than 0, and b* is from -50 to 30 or less, a maximum absorption wavelength A exists within the range of 425 nm to 465 nm, and the minimum value of the spectral transmittance of the maximum absorption wavelength A is 0.65% or more and 97% or less, a maximum absorption wavelength B exists within the range of 545 nm to 595 nm, and the minimum value of the spectral transmittance of the maximum absorption wavelength B is 5% or more and 98% or less, an optical material.

2. The optical material according to claim 1, wherein the absorption width of the absorption wavelength including the maximum absorption wavelength B is 50 nm to 150 nm.

3. The optical material according to claim 1, wherein the visual transmittance at a thickness of 2 mm is 13% or more and 98% or less.

4. The optical material according to claim 1, wherein the difference between the maximum absorption wavelength B and the maximum absorption wavelength A is 100 nm to 180 nm.

5. The optical material according to claim 1, comprising at least one polymer selected from the group consisting of polyurethane, polythiourethane, polysulfide, polycarbonate, and poly(meth)acrylate

6. A lens comprising the optical material according to any one of claims 1 to 5.

7. A method of using spectacles lenses comprising the optical material according to any one of claims 1 to 5, wherein the spectacles lenses are used for 75% or more of the display usage time per hour and the display usage time per day is 1 hour or more in an environment with a display illuminance of 300 lux or more.

8. A method for manufacturing an optical material, comprising a step of designing an optical material that satisfies each condition that the visual transmittance in scenes with an indoor illuminance of 100 lux, a display illuminance of 300 lux, and an outdoor illuminance of 750 lux is 3% to 90%, and in the CIE1976 (L*, a*, b*) color system measured at a thickness of 2 mm, a* is from -30 to less than 0, and b* is from -50 to 30.

9. The method for manufacturing an optical material according to claim 8, wherein the optical material is spectacles lenses.

10. In the step of designing the optical material, the optical material that satisfies each condition is designed based on the visual function test result of a subject by a visual function test device, according to the method for manufacturing an optical material according to claim 8 or claim 9.

Images