Spectacle lens production method

Abstract

Provided is a spectacle lens production method for making an obtained spectacle lens less prone to fogging on the surface thereof. This spectacle lens production method comprises a step of using vacuum deposition to form a water- and oil-repellent layer on a subject including a spectacle lens substrate while introducing argon gas thereto.

Description

Eyeglass lens manufacturing method

[0001] The present disclosure relates to a method for manufacturing eyeglass lenses.

[0002] Various studies have been conducted on spectacle lenses. A water- and oil-repellent layer is sometimes provided on spectacle lenses for the purpose of imparting antifouling properties. For example, Patent Document 1 describes a spectacle lens substrate having a water- and oil-repellent layer formed by vacuum deposition.

[0003] International Publication No. 2017 / 126300

[0004] The present disclosure relates to a method for manufacturing a spectacle lens, which includes a step of forming a water- and oil-repellent layer on an object including a spectacle lens substrate by vacuum deposition while introducing argon gas.

[0005] 1 is a cross-sectional view of an embodiment of a spectacle lens.

[0006] The method for manufacturing eyeglass lenses according to the present disclosure will be described in detail below. It is desirable that manufactured eyeglass lenses do not develop fogging on their surfaces. Eyeglass lenses obtained by the method for manufacturing eyeglass lenses according to the present disclosure are less likely to develop fogging on their surfaces. In this disclosure, the term "to" is used to mean that the numerical values ​​before and after it are included as the lower and upper limits. In this disclosure, the refractive index refers to the refractive index at the e-line.

[0007] The manufacturing method for eyeglass lenses of the present disclosure (hereinafter also referred to as the "manufacturing method of the present disclosure") produces eyeglass lenses having an eyeglass lens substrate and a water- and oil-repellent layer disposed on the eyeglass lens substrate. Note that "disposed on the eyeglass lens substrate" includes cases where the layer is disposed in direct contact with the surface of the eyeglass lens substrate, and cases where the layer is disposed on the surface of the eyeglass lens substrate via another layer. First, we will explain the eyeglass lenses (hereinafter also simply referred to as "eyeglass lenses") manufactured by the manufacturing method of the present disclosure.

[0008] <Eyeglass Lens> Fig. 1 is a cross-sectional view of one embodiment of an eyeglass lens. The eyeglass lens 10 shown in Fig. 1 includes, in this order, an eyeglass lens substrate 12, an anti-reflection coating 14, and a water- and oil-repellent layer 16. Although the eyeglass lens 10 includes the anti-reflection coating 14, the anti-reflection coating 14 is an optional component, and the eyeglass lens of the present disclosure only needs to include at least an eyeglass lens substrate and a water- and oil-repellent layer.

[0009] 1, the water- and oil-repellent layer 16 is disposed on only one side of the lens substrate 12, but the water- and oil-repellent layer 16 may be disposed on both sides of the spectacle lens substrate 12. In other words, the spectacle lens may have a water- and oil-repellent layer on both sides of the spectacle lens substrate.

[0010] The eyeglass lens of the present disclosure may include layers other than the anti-reflection coating and the water- and oil-repellent layer. For example, the eyeglass lens may have an eyeglass lens substrate, a primer layer, a hard coat layer, an anti-reflection coating, and a water- and oil-repellent layer in this order. Note that each of the above layers may be disposed on both sides of the eyeglass lens substrate. Each configuration included in the eyeglass lens of the present disclosure will be described below.

[0011] [Eyeglass Lens Substrate] The eyeglass lens substrate is a component that supports other layers, including a water- and oil-repellent layer. The type of eyeglass lens substrate is not particularly limited, and examples include ordinary eyeglass lens substrates composed of plastic, inorganic glass, etc., with plastic eyeglass lens substrates being preferred due to their excellent handling properties. The type of plastic eyeglass lens substrate is not particularly limited, and examples include finished lenses in which both the convex and concave surfaces are optically finished and molded to the desired dioptric power, semi-finished lenses in which only the convex surface is finished as an optical surface (spherical, rotationally symmetric aspherical, progressive, etc.), and semi-finished lenses in which the concave surface is processed and polished to match the wearer's prescription. The type of plastic (so-called resin) contained in the plastic eyeglass lens substrate is not particularly limited, and examples include (meth)acrylic acid ester resins, thiourethane resins, allyl resins, episulfide resins, polycarbonates, urethane resins, polyesters, polystyrene, polyethersulfone, poly-4-methylpentene-1, and diethylene glycol bisallyl carbonate resin (CR-39). Among these, thiourethane resin, episulfide resin, and diethylene glycol bisallyl carbonate resin are preferably used. The thiourethane resin is obtained from a polyisocyanate compound and a polythiol compound. As the polyisocyanate compound, it is preferable to use at least one selected from m-xylylene diisocyanate, a mixture of 2,5-bis(isocyanatomethyl)-bicyclo[2,2,1]heptane and 2,6-bis(isocyanatomethyl)-bicyclo[2,2,1]heptane, isophorone diisocyanate, hexamethylene diisocyanate, and tolylene diisocyanate.As the polythiol compound, it is preferable to use at least one selected from pentaerythritol tetrakis(3-mercaptopropionate), 1,2-bis[(2-mercaptoethyl)thio]-3-mercaptopropane, and a mixture of 5,7-dimercaptomethyl-1,11-dimercapto-3,6,9-trithiaundecane, 4,7-dimercaptomethyl-1,11-dimercapto-3,6,9-trithiaundecane, and 4,8-dimercaptomethyl-1,11-dimercapto-3,6,9-trithiaundecane. The episulfide resin is obtained by ring-opening polymerization of a monomer having an episulfide group (also referred to as an epithio group) or a mixed monomer containing this monomer. As the monomer having an episulfide group, it is preferable to use at least one selected from bis(2,3-epithiopropyl) sulfide and bis(2,3-epithiopropyl) disulfide.

[0012] The thickness of the plastic eyeglass lens substrate is not particularly limited, but from the viewpoint of ease of handling, it is often about 1 to 30 mm. The refractive index of the plastic eyeglass lens substrate is not particularly limited, but it is often 1.50 or more, preferably 1.60 to 1.80, and more preferably 1.60 to 1.74.

[0013] Furthermore, the spectacle lens substrate does not have to be colorless as long as it is translucent, and may contain an ultraviolet absorber and a dye that absorbs light in a specific wavelength range from the ultraviolet to the infrared region. The spectacle lens substrate may also contain additives such as a bluing agent, a light stabilizer, and an antioxidant.

[0014] [Primer Layer] The spectacle lens may have a primer layer. The primer layer is preferably disposed between the spectacle lens substrate and the hard coat layer. When a primer layer is disposed between the spectacle lens substrate and the hard coat layer, it improves the adhesion of the hard coat layer to the spectacle lens substrate and improves its strength against static load or impact. The material constituting the primer layer is not particularly limited, and known materials can be used, for example, resins are mainly used. The type of resin used is not particularly limited, and examples include polyurethane resins, epoxy resins, phenolic resins, polyimide resins, polyester resins, bismaleimide resins, and polyolefin resins, with polyurethane resins being preferred. The primer layer may contain components other than the above resins. Examples of other components include oxide fine particles of at least one metal selected from Si, Al, Sn, Sb, Ta, Ce, La, Fe, Zn, W, Zr, In, and Ti, or composite oxide fine particles thereof, hydrolyzable silicon compounds and / or their hydrolysis condensates, conductive fillers, specific polymers, and surfactants.

[0015] The method for forming the primer layer is not particularly limited, and known methods can be used, such as a method in which a primer layer-forming composition containing a predetermined resin is applied to a spectacle lens substrate, and a curing treatment is performed as necessary to form a primer layer. The method for applying the primer layer-forming composition is not particularly limited, and examples thereof include a method exemplified by the method of applying a hard coat layer-forming composition described below to a spectacle lens substrate. The thickness of the primer layer is not particularly limited, but is preferably 0.3 to 2 μm.

[0016] [Hard Coat Layer] The eyeglass lens may have a hard coat layer. The hard coat layer is preferably disposed between the eyeglass lens substrate and the anti-reflection film, and is a layer that imparts scratch resistance to the eyeglass lens substrate. The hard coat layer preferably exhibits a pencil hardness of "H" or higher according to the test method defined in International Standard ISO 15184 and Japanese Industrial Standard JIS K5600, which was created based on this international standard.

[0017] As the hard coat layer, a known hard coat layer can be used, for example, an organic hard coat layer, an inorganic hard coat layer, or an organic-inorganic hybrid hard coat layer. For example, in the field of eyeglass lenses, an organic-inorganic hybrid hard coat layer is commonly used.

[0018] The hard coat layer preferably contains a polymer of a polymerizable monomer (a polymer obtained by polymerizing a polymerizable monomer) and / or a condensate of a hydrolyzable organosilicon compound. The polymerizable monomer is not particularly limited, but examples thereof include (meth)acrylates having at least one group selected from the group consisting of phosphate groups and sulfonic acid groups, silsesquioxanes having radical polymerizable groups, polyfunctional acrylates, compounds having multiple epoxy groups, and silsesquioxane compounds having oxetanyl groups. Note that (meth)acrylate refers to acrylate or methacrylate. The hydrolyzable organosilicon compound is not particularly limited, but examples thereof include organosilicon compounds having epoxy groups.

[0019] The hard coat layer may also contain inorganic components such as metal oxide fine particles. The type of metal oxide fine particles is not particularly limited, and examples include known metal oxide fine particles. Examples of metal oxide fine particles include fine particles of at least one metal oxide selected from Si, Al, Sn, Sb, Ta, Ce, La, Fe, Zn, W, Zr, In, and Ti. Among these, in terms of ease of handling, metal oxide fine particles are preferably fine particles of oxides containing Si (silicon oxide fine particles), oxides containing Sn (tin oxide fine particles), oxides containing Zr (zirconium oxide fine particles), or oxides containing Ti (titanium oxide fine particles). The metal oxide fine particles may contain only one of the above-mentioned metals (metal atoms) or two or more metals (metal atoms). Although Si (silicon) is sometimes classified as a semimetal, the disclosed Si is included in the metals.

[0020] The hard coat layer is preferably formed using a hard coat layer-forming composition containing a polymerizable monomer. The hard coat layer-forming composition may contain, in addition to the polymerizable monomer, the metal oxide fine particles, other components, and a solvent. Examples of other components include a radical polymerization initiator, a cationic polymerization initiator, and a curing catalyst. Other components may also include various additives, such as UV absorbers, antioxidants, coating modifiers, light stabilizers, antioxidants, color inhibitors, dyes, fillers, and internal mold release agents, which are added as needed. The solvent may be water or an organic solvent. The type of organic solvent is not particularly limited, and examples include alcohol-based solvents, ketone-based solvents, ether-based solvents, ester-based solvents, hydrocarbon-based solvents, halogenated hydrocarbon-based solvents, amide-based solvents, sulfone-based solvents, and sulfoxide-based solvents.

[0021] A method for forming a hard coat layer using a hard coat layer-forming composition includes applying the hard coat layer-forming composition to a spectacle lens substrate (or a primer layer) to form a coating film, and then subjecting the coating film to a curing treatment such as a light irradiation treatment and a heat treatment. As the curing treatment, either one of a light irradiation treatment or a heat treatment may be performed, or both may be performed. When both are performed, the light irradiation treatment and the heat treatment may be performed simultaneously, or one may be performed first and then the other. After forming the coating film, a drying treatment such as a heat treatment may be performed, if necessary, to remove the solvent from the coating film.

[0022] The method for applying the composition for forming a hard coat layer is not particularly limited, and includes known methods (e.g., dipping coating, spin coating, spray coating, inkjet coating, and flow coating). The thickness of the coating film to be formed is not particularly limited, and a thickness that will result in a predetermined hard coat layer thickness is appropriately selected.

[0023] The conditions for the light irradiation treatment are not particularly limited, and appropriate conditions are selected depending on the type of polymerization initiator used. The type of light used for light irradiation is not particularly limited, but examples include ultraviolet light and visible light. Examples of light sources include high-pressure mercury lamps. The cumulative light amount used for light irradiation is not particularly limited, but from the viewpoints of productivity and curability of the coating film, it is preferred to use a light amount of 100 to 3000 mJ / cm. ２ is preferred, and 100 to 2000 mJ / cm ２ The conditions for the heat treatment are not particularly limited, and the optimum conditions are selected depending on the type of polymerization initiator used. The heating temperature is preferably 30 to 100°C, and the heating time is preferably 5 to 360 minutes.

[0024] The thickness of the hard coat layer is not particularly limited, but is preferably 1 μm or more, more preferably 3 μm or more, and even more preferably 10 μm or more. The upper limit of the thickness can be, for example, 30 μm or less. The thickness is an average thickness, and the measurement method is to measure the thickness at any five points on the hard coat layer and calculate the arithmetic average.

[0025] The hard coat layer may contain additives such as a bluing agent, a light stabilizer, and an antioxidant.

[0026] [Anti-reflection film] The spectacle lens may have an anti-reflection film. An anti-reflection film is a layer that has the function of preventing reflection of incident light. Specifically, it can have low reflectance characteristics (broadband low reflectance characteristics) over the entire visible range of 380 to 780 nm.

[0027] The structure of the antireflective film is not particularly limited, and may be a single-layer structure or a multilayer structure. An inorganic antireflective film is preferred as the antireflective film. An inorganic antireflective film is an antireflective film composed of an inorganic compound. In the case of a multilayer structure, a structure in which low-refractive-index layers and high-refractive-index layers are alternately stacked is preferred. Examples of materials constituting the high-refractive-index layers include oxides of titanium, zirconium, aluminum, niobium, tantalum, or lanthanum. Examples of materials constituting the low-refractive-index layers include oxides of silica. The method for producing the antireflective film is not particularly limited, and examples include dry methods such as vacuum deposition, sputtering, ion plating, ion-beam assisted deposition, and CVD.

[0028] [Water- and oil-repellent layer] The eyeglass lens has a water- and oil-repellent layer. The water- and oil-repellent layer is preferably disposed as the outermost layer of the eyeglass lens. The water- and oil-repellent layer reduces the surface energy of the eyeglass lens, improving the anti-fouling function of the eyeglass lens and improving the slipperiness of the eyeglass lens surface, which in turn improves the abrasion resistance of the eyeglass lens.

[0029] The material constituting the water- and oil-repellent layer is not particularly limited, and examples thereof include fluorine-containing compounds (compounds containing fluorine atoms) and silicon-containing compounds (compounds containing silicon atoms). Among these, the water- and oil-repellent layer preferably contains a fluorine-containing compound, and more preferably contains at least one selected from the group consisting of fluorine-substituted alkyl group-containing organosilicon compounds, their hydrolysates, and their hydrolyzed condensates. The material constituting the water- and oil-repellent layer may be used alone or in combination of two or more.

[0030] The organosilicon compound containing fluorine-substituted alkyl group is the organosilicon compound that contains alkyl group in which part or all of hydrogen atom is replaced by fluorine atom, and has hydrolyzable group.Here, the hydrolyzable group is the group that is directly bonded to silicon atom and can proceed hydrolysis reaction and condensation reaction, for example, alkoxy group, halogen atom, acyloxy group, alkenyloxy group and isocyanate group.It should be noted that when a plurality of hydrolyzable groups are directly bonded to one silicon atom, they can be the same or different.

[0031] The hydrolyzate of a fluorine-substituted alkyl group-containing organosilicon compound refers to a compound obtained by hydrolyzing the hydrolyzable groups in a fluorine-substituted alkyl group-containing organosilicon compound. The hydrolyzate may be one in which all of the hydrolyzable groups are hydrolyzed (complete hydrolyzate) or one in which only a portion of the hydrolyzable groups are hydrolyzed (partial hydrolyzate). In other words, the hydrolyzate may be a complete hydrolyzate, a partial hydrolyzate, or a mixture thereof. The hydrolyzed condensate of a fluorine-substituted alkyl group-containing organosilicon compound refers to a compound obtained by hydrolyzing the hydrolyzable groups in a fluorine-substituted alkyl group-containing organosilicon compound and condensing the resulting hydrolyzate. The hydrolyzed condensate may be one in which all of the hydrolyzable groups are hydrolyzed and the hydrolyzate is completely condensed (complete hydrolyzed condensate), or one in which only a portion of the hydrolyzable groups are hydrolyzed and a portion of the hydrolyzate is condensed (partial hydrolyzed condensate). In other words, the hydrolyzed condensate may be a complete hydrolyzed condensate, a partial hydrolyzed condensate, or a mixture thereof.

[0032] The method for forming the water- and oil-repellent layer will be described in detail later.

[0033] The thickness of the water- and oil-repellent layer of the spectacle lens is not particularly limited, but is preferably 5 to 35 nm. If the thickness is within the above range, the spectacle lens will have excellent water- and oil-repellent properties.

[0034] <Method for manufacturing eyeglass lenses> The method for manufacturing eyeglass lenses of the present disclosure (the manufacturing method of the present disclosure) includes a step of forming a water- and oil-repellent layer on an object including an eyeglass lens substrate by vacuum deposition while introducing argon gas (hereinafter also referred to as a "water- and oil-repellent layer forming step"). The manufacturing method of the present disclosure is not particularly limited as long as it includes the water- and oil-repellent layer forming step, and may also include other steps (for example, a step of forming a layer included in the eyeglass lens). Each step will be described below.

[0035] [Water- and Oil-Repellent Layer Formation Process] In the water- and oil-repellent layer formation process, a water- and oil-repellent layer is formed on an object, including a spectacle lens substrate, by vacuum deposition while introducing argon gas. The object may be a spectacle lens substrate, or may include a spectacle lens substrate and one or more layers selected from the group consisting of a primer layer, a hard coat layer, and an anti-reflective coating. For example, the object preferably includes a spectacle lens substrate having a spectacle lens substrate and an anti-reflective coating disposed thereon, and more preferably includes a primer layer, a hard coat layer, and an anti-reflective coating in this order. When the object includes one or more layers selected from the group consisting of a primer layer, a hard coat layer, and an anti-reflective coating, the water- and oil-repellent layer is formed on the spectacle lens substrate via the included layers. The spectacle lens substrate, primer layer, hard coat layer, and anti-reflective coating are as described above.

[0036] The water- and oil-repellent layer forming step uses a vacuum deposition method. More specifically, in a reduced pressure environment, a material for forming the water- and oil-repellent layer is vaporized from a vapor deposition source, and the vaporized material is brought into contact with the object to form the water- and oil-repellent layer on the object. The vacuum deposition method is carried out, for example, in a vacuum chamber. The base pressure of the vacuum chamber (the pressure when no deposition or the like is being carried out) is 1.0 × 10 －１ ~1.0 x 10 －６ In this disclosure, the pressure inside the vacuum chamber is measured using a Bayard-Alpert vacuum gauge, which is a type of hot cathode ionization vacuum gauge. In this disclosure, the Bayard-Alpert vacuum gauge used has its sensitivity corrected using nitrogen gas.

[0037] When performing the vacuum deposition method, the deposition source may be heated. Examples of a means for heating the deposition source include resistance heating. When heating the deposition source, the heating temperature can be adjusted depending on the material used and the desired deposition rate. The material for forming the water- and oil-repellent layer contained in the deposition source is as described above. That is, the deposition source is preferably a fluorine-containing compound (a compound containing a fluorine atom), and the fluorine-containing compound is preferably a fluorine-containing compound having a hydrolyzable group (e.g., an organosilicon compound containing a fluorine-substituted alkyl group). The deposition source may consist solely of the material for forming the water- and oil-repellent layer, or may be a pellet impregnated with the material for forming the water- and oil-repellent layer.

[0038] In the water- and oil-repellent layer-forming step, the water- and oil-repellent layer is formed while introducing argon gas. The present inventors have surprisingly found that by forming the water- and oil-repellent layer while introducing argon gas, fogging is less likely to occur on the surface of the resulting eyeglass lens. It is preferable to use high-purity grade argon gas for the introduced argon gas. For example, the purity of the argon gas is preferably 99.9% by volume or more, and more preferably 99.99% by volume or more. The pressure inside the vacuum chamber when introducing argon gas to form the water- and oil-repellent layer is 1.0×10 －１ ~1.0 x 10 －３ It is preferable to adjust the pressure to 5.4×10 Pa. －２ ~4.8 x 10 －３ It is more preferable to adjust the pressure in the vacuum chamber to within the above-mentioned preferred range by introducing argon gas, and then start forming the water- and oil-repellent layer.

[0039] When introducing argon gas into the vacuum chamber, known means can be used. For example, the vacuum chamber and an argon gas supply source can be connected via a flow control valve, and the amount of argon gas introduced can be adjusted by the flow control valve. It is also preferable to adjust the opening of the flow control valve according to the pressure inside the vacuum chamber, and adjust the amount of argon gas introduced to the above-mentioned preferred pressure inside the chamber. The amount of argon gas introduced can be appropriately adjusted depending on the volume of the vacuum chamber and the exhaust speed of the vacuum pump connected to the vacuum chamber, etc. The amount of argon gas introduced is preferably, for example, 1 to 10 sccm, and more preferably 4 to 7 sccm. Note that "sccm" is an abbreviation for "Standard Cubic Centrimeter per Minute" and is the gas flow rate (cm) per minute converted to a volume value at 1 atmosphere (1013.25 hPa) and 0°C. ３ / min).

[0040] The formation rate of the water- and oil-repellent layer when forming it while introducing argon gas can be adjusted appropriately. For example, the formation rate of the water- and oil-repellent layer can be 0.1 to 10 nm / s. The formation rate of the water- and oil-repellent layer can be monitored by a film thickness meter installed in the vacuum chamber. The formation rate of the water- and oil-repellent layer can be adjusted, for example, by the heating temperature of the vapor deposition source and the pressure in the vacuum chamber. The preferred film thickness of the water- and oil-repellent layer to be formed is as described above.

[0041] When forming the water- and oil-repellent layer, the temperature of the object may be controlled, and the temperature of the object is preferably controlled to 40 to 100°C.

[0042] An example of an apparatus capable of carrying out the water- and oil-repellent layer-forming process is a known vacuum deposition apparatus. More specifically, an apparatus for carrying out the water- and oil-repellent layer-forming process includes an apparatus having a vacuum chamber, a deposition source installed in the vacuum chamber, an evaporation means for evaporating the deposition source, a holding means for holding the workpiece, a shutter installed between the deposition source and the workpiece, an argon gas introduction means connected to the vacuum chamber, and a vacuum pump for evacuating the workpiece. The vacuum deposition apparatus may also have a film thickness meter for monitoring the formation rate of the water- and oil-repellent layer.

[0043] The manufacturing method of the present disclosure may include other steps in addition to the water- and oil-repellent layer-forming step. Examples of the other steps include a step of forming a primer layer, a step of forming a hard coat layer, and a step of forming an anti-reflective coating. The methods for the steps of forming the primer layer, the hard coat layer, and the anti-reflective coating are as described above. When applying a vacuum deposition method to the step of forming an anti-reflective coating, the anti-reflective coating may be formed in a vacuum chamber, and then the water- and oil-repellent layer-forming step may be carried out continuously in the same vacuum chamber. In this case, before starting the water- and oil-repellent layer-forming step (e.g., before introducing argon gas), only evacuation may be carried out until the pressure in the vacuum chamber reaches a predetermined value. The predetermined pressure is set as appropriate, but may be 1.0 x 10 －２ ~5.0 x 10 －４ Pa is preferred, for example, 4.0 × 10 －３ Examples include Pa.

[0044] <Uses> The spectacle lenses obtained by the manufacturing method of the present disclosure are suitable for use in spectacles because they are less likely to become cloudy on the surface. In addition, because the spectacle lenses have a water- and oil-repellent layer, they are less likely to become soiled and have excellent abrasion resistance.

[0045] The above-mentioned embodiments will be explained in more detail below with reference to examples and comparative examples, but the present disclosure is not limited to these examples in any way.

[0046] <Manufacturing of Spectacle Lenses> Hereinafter, a method for manufacturing spectacle lenses of each of the Examples and Comparative Examples will be described.

[0047] [Example 1] First, a plastic substrate with a refractive index of 1.60 was prepared as a plastic eyeglass lens substrate. The prepared plastic eyeglass lens substrate was placed in a rotating dome of a vacuum deposition device with the convex surface facing inward. After placing the plastic eyeglass lens substrate in the dome, it was heated so that the temperature of the plastic eyeglass lens substrate reached 70°C, and in the heated state, the pressure in the vacuum chamber was increased to 1.0 x 10 －３The pressure inside the vacuum chamber was measured using an INFICON BAG302 (hot cathode ionization vacuum gauge (Bayard-Alpert vacuum gauge)). The pressure inside the vacuum chamber shown in this example and the following is a measurement value using the above vacuum gauge whose sensitivity has been corrected using nitrogen gas. When the pressure inside the vacuum chamber reached 1.0 x 10 －３ After the pressure reached Pa, an argon ion beam was irradiated onto the surface (convex surface) of the plastic eyeglass lens substrate. The argon ion beam was irradiated under conditions of an acceleration voltage of 500 V and a discharge current of 100 mA, and the irradiation time was 60 seconds. After the argon ion beam irradiation, an anti-reflection film was formed on the plastic eyeglass lens substrate. The anti-reflection film had the following materials and thicknesses, starting from the plastic eyeglass lens substrate side. Here, λ is the design central wavelength, and λ = 500 nm. First layer: ZrO ２ (refractive index 2.00), optical film thickness 0.110λ Second layer: SiO ２ (refractive index 1.47), optical film thickness 0.130λ Third layer: ZrO ２ (refractive index 2.00), optical film thickness 0.160λ Fourth layer: SiO ２ (refractive index 1.47), optical film thickness 0.060λ 5th layer: ZrO ２ (refractive index 2.00), optical film thickness 0.190λ 6th layer: SiO ２ (refractive index 1.47), optical film thickness 0.340λ

[0048] After forming an anti-reflection film on the plastic eyeglass lens substrate, a water- and oil-repellent layer was formed on the surface opposite the plastic eyeglass lens substrate side of the sixth layer. To form the water- and oil-repellent layer, a vapor deposition source was used, which was a mixture of KY164 (manufactured by Shin-Etsu Chemical Co., Ltd.), UD-100 (manufactured by Daikin Industries, Ltd.), and KP911 (manufactured by Shin-Etsu Chemical Co., Ltd.) in a mass ratio of 50:25:25 in terms of solid content. The water- and oil-repellent layer was formed by vapor deposition of argon gas at a pressure of 4.8 x 10 in a vacuum chamber. －３The deposition source was heated while the flow rate was adjusted with a flow rate control valve so that the pressure was 10 Pa. The deposition source was heated by passing current through a resistor provided in the device. The current flow during deposition was set to 90 A. The amount of argon gas introduced into the device when adjusted to the above pressure was 4 sccm. Industrial argon gas (purity: 99.99% by volume or higher) was used as the argon gas introduced.

[0049] After forming an anti-reflection film and a water- and oil-repellent layer in this order on the convex side of the plastic eyeglass lens substrate using the above procedure, the plastic eyeglass lens substrate was placed in the rotating dome of a vacuum deposition device with the concave surface facing inward. After placing the plastic eyeglass lens substrate in the dome, an argon ion beam was irradiated onto the concave surface using the same procedure as for the convex surface. After irradiating with the argon ion beam, an anti-reflection film was formed on the plastic eyeglass lens substrate. The anti-reflection film was made of the following materials and thicknesses, starting from the plastic eyeglass lens substrate side. Here, λ is the design central wavelength, and λ = 500 nm. First layer: ZrO ２ (refractive index 2.00), optical film thickness 0.050λ Second layer: SiO ２ (refractive index 1.47), optical thickness 0.080λ Third layer: ZrO ２ (refractive index 2.00), optical film thickness 0.150λ Fourth layer: SiO ２ (refractive index 1.47), optical film thickness 0.040λ 5th layer: ZrO ２ (refractive index 2.00), optical film thickness 0.110λ 6th layer: SiO ２ (refractive index 1.47), optical film thickness 0.220λ

[0050] After forming an anti-reflection film on the plastic spectacle lens substrate, a water- and oil-repellent layer was formed on the surface opposite the plastic spectacle lens substrate side of the sixth layer. The conditions for forming the water- and oil-repellent layer were the same as for the convex side. By using the above procedure, a spectacle lens having an anti-reflection film and a water- and oil-repellent layer, in this order, on both sides of the plastic spectacle lens substrate was obtained.

[0051] Comparative Example 1 A spectacle lens was obtained in the same manner as in Example 1, except that in the procedure for obtaining the spectacle lens of Example 1, the argon gas introduced during the formation of the water- and oil-repellent layer was changed to oxygen gas (industrial oxygen gas (purity: 99.999% by volume or more)).

[0052] [Example 2] A spectacle lens was obtained in the same manner as in Example 1, except that in the procedure for obtaining the spectacle lens of Example 1, the vapor deposition source used for forming the water- and oil-repellent layer was changed to KY164 (manufactured by Shin-Etsu Chemical Co., Ltd.).

[0053] [Comparative Example 2] A spectacle lens was obtained in the same manner as in Example 2, except that in the procedure for obtaining the spectacle lens of Example 2, the argon gas introduced during the formation of the water- and oil-repellent layer was changed to the oxygen gas used in Comparative Example 1.

[0054] Example 3 A spectacle lens was obtained in the same manner as in Example 1, except that in the procedure for obtaining the spectacle lens of Example 1, the vapor deposition source used for forming the water- and oil-repellent layer was changed to UD-100 (manufactured by Daikin Industries, Ltd.).

[0055] Comparative Example 3 A spectacle lens was obtained in the same manner as in Example 3, except that in the procedure for obtaining the spectacle lens of Example 3, the argon gas introduced during the formation of the water- and oil-repellent layer was changed to the oxygen gas used in Comparative Example 1.

[0056] Example 4 A spectacle lens was obtained in the same manner as in Example 1, except that in the procedure for obtaining the spectacle lens of Example 1, the vapor deposition source used for forming the water- and oil-repellent layer was changed to UD-120 (manufactured by Daikin Industries, Ltd.).

[0057] Comparative Example 4 A spectacle lens was obtained in the same manner as in Example 4, except that in the procedure for obtaining the spectacle lens of Example 4, the argon gas introduced during the formation of the water- and oil-repellent layer was changed to the oxygen gas used in Comparative Example 1.

[0058] Example 5 A spectacle lens was obtained in the same manner as in Example 1, except that in the procedure for obtaining the spectacle lens of Example 1, the vapor deposition source used for forming the water- and oil-repellent layer was changed to DSX-E (manufactured by Daikin Industries, Ltd.).

[0059] Comparative Example 5 A spectacle lens was obtained in the same manner as in Example 5, except that in the procedure for obtaining the spectacle lens of Example 5, the argon gas introduced during the formation of the water- and oil-repellent layer was changed to the oxygen gas used in Comparative Example 1.

[0060] [Examples 6 to 10 and Comparative Examples 6 to 10] The pressure in the vacuum chamber was 5.4 × 10 －２ The spectacle lenses of Examples 6 to 10 and Comparative Examples 6 to 10 were obtained in the same manner as in Examples 1 to 5 and Comparative Examples 1 to 5, respectively, except that the vapor deposition source was heated while introducing argon gas while adjusting the flow rate with a flow rate adjustment valve so that the pressure in the device was 7 Pa. The amount of argon gas introduced when the device was adjusted to the above pressure was 7 sccm.

[0061] <Evaluation and Results> For the eyeglass lenses obtained by the procedures of Examples 1 to 10 and Comparative Examples 1 to 10, approximately the right half of the convex surface was wiped with Kimwipes (registered trademark) soaked in acetone. For each eyeglass lens wiped with Kimwipes (registered trademark), the wiped right half was compared with the unwiped left half, and the presence or absence of fogging on the unwiped left half was visually confirmed. The presence or absence of fogging was also confirmed for other eyeglass lenses obtained by the methods of each Example and Comparative Example. That is, the presence or absence of fogging was confirmed using the above method for two eyeglass lenses obtained by the methods of each Example and Comparative Example.

[0062] <Results> Table 1 shows the procedures for each of the above examples and comparative examples, and the evaluation results of the obtained eyeglass lenses.

[0063]

[0064] The results in Table 1 confirm that when the water- and oil-repellent layer is formed while introducing argon gas, no fogging occurs on the surface, whereas when the water- and oil-repellent layer is formed while introducing oxygen gas, fogging occurs on the surface.

[0065] 10 eyeglass lens 12 eyeglass lens substrate 14 anti-reflection film 16 water- and oil-repellent layer

Claims

1. A method for manufacturing eyeglass lenses, comprising the step of forming a water-repellent and oil-repellent layer on an object including an eyeglass lens substrate by vacuum deposition while introducing argon gas.

2. The method for manufacturing a spectacle lens according to claim 1 , wherein a vapor deposition source used when forming the water- and oil-repellent layer by vacuum vapor deposition contains a compound containing a fluorine atom.

3. The method for manufacturing a spectacle lens according to claim 2 , wherein the compound containing a fluorine atom has a hydrolyzable group.

4. 4. The method for manufacturing a spectacle lens substrate according to claim 1, wherein the object has the spectacle lens substrate and an anti-reflection film disposed on the spectacle lens substrate.

5. 4. The method for manufacturing a spectacle lens substrate according to claim 1, wherein the object has the spectacle lens substrate, a primer layer, a hard coat layer, and an anti-reflection film in this order.