Spectacle lens and spectacles

Abstract

[Problem] To provide a spectacle lens and spectacles with which it is possible to obtain better visibility while suppressing transmission of blue light and reducing a burden on an eye. [Solution] A spectacle lens 1 includes: a base material 2; and a multilayer film 4 indirectly disposed on a film placing surface F of the base material 2. The multilayer film 4 includes one or more low refractive index layers 6, one or more high refractive index layers 8, and an absorption layer 10. The absorption layer 10 contains SnOz (0 < z ≤ 2). The absorption layer 10 is disposed closer to the base material 2 than the high refractive index layer 8 on the most atmosphere side.

Description

Eyeglass lenses and glasses

[0001] The present invention relates to eyeglass lenses and eyeglasses that reduce or cut the transmission of blue light, i.e., blue light, which has a wavelength within a wavelength range on the short wavelength side of the visible range and is visually perceived as blue.

[0002] A spectacle lens that reduces the strain on the eyes caused by blue light by absorbing rather than reflecting blue light is known to be disclosed in Japanese Patent No. 6873880 (Patent Document 1). This spectacle lens has a multilayer film including a chromium (Cr) layer with a thickness of 1.0 to 10.0 nm. Also, an antistatic article is known to be disclosed in Japanese Patent Publication No. 4-63117 (Patent Document 2). This antistatic article uses tin dioxide (SnO ２ The anti-reflection coating has two or more layers, at least one of which contains 1,2-dimethyl-2,4-trimethylsilyl-2,4-dione as a main component.

[0003] Patent No. 6873880 Publication Special Publication No. 4-63117

[0004] The Cr layer absorbs not only blue light but also light in other wavelength ranges in the visible range, such as green light and red light. Therefore, spectacle lenses having a Cr layer have a reduced luminous transmittance and reduced visibility. ２ A layer containing SnO as a main component is known as a transparent conductive film provided to prevent charging. ２ The physical film thickness of the layer mainly composed of SnO is thicker than 65 nm in order to obtain an antistatic effect. ２ In order to obtain an antistatic effect, the layer containing the above as a main component is disposed in the multilayer film as the outermost layer, which is the layer closest to the surface, or as the next outermost layer, which is the layer adjacent to the outermost layer on the back surface side. The surface side is also referred to as the air side or the objective side. The back surface side is also referred to as the substrate side or the eyeball side.

[0005] A primary object of the present invention is to provide a spectacle lens that suppresses the transmission of blue light to reduce eye strain while providing better visibility, and eyeglasses equipped with the spectacle lens.

[0006] This specification discloses an eyeglass lens. The eyeglass lens may include a substrate. The eyeglass lens may include a multilayer film disposed directly or indirectly on a film-disposing surface of the substrate. The multilayer film may include one or more low refractive index layers. The multilayer film may include one or more high refractive index layers. The multilayer film may include an absorbing layer. The absorbing layer may include SnO ｚ (0<z≦2). The absorbing layer may be disposed closer to the substrate than the high refractive index layer closest to the atmosphere. This specification also discloses a spectacle lens. This spectacle lens may include a substrate. The spectacle lens may include a multilayer film disposed directly or indirectly on the film-arrangement surface of the substrate. The multilayer film may include one or more low refractive index layers. The multilayer film may include one or more high refractive index layers. The multilayer film may include an absorbing layer. The absorbing layer may be made of SnO ｚ (0<z≦2). The absorbing layer does not have to be arranged on the outermost layer, which is the layer closest to the atmosphere in the multilayer film. The absorbing layer does not have to be arranged on the next outermost layer, which is the layer adjacent to the outermost layer on the substrate side. Furthermore, this specification discloses a spectacle lens. This spectacle lens may include a substrate. The spectacle lens may include a multilayer film arranged directly or indirectly on the film-arrangement surface of the substrate. The multilayer film may include one or more low-refractive-index layers. The multilayer film may include one or more high-refractive-index layers. The multilayer film may include an absorbing layer. The absorbing layer is made of SnO ｚ (0<z≦2). The absorbing layer may be disposed closer to the substrate than the low refractive index layer closest to the atmosphere. The absorbing layer may be disposed closer to the substrate than the high refractive index layer closest to the atmosphere. Furthermore, this specification discloses eyeglasses. The eyeglasses may include the above-mentioned eyeglass lenses.

[0007] A main effect of the present invention is to provide a spectacle lens that suppresses the transmission of blue light to reduce eye strain while providing better visibility, and eyeglasses equipped with the spectacle lens.

[0008] 1 is a schematic cross-sectional view of a spectacle lens according to the present invention. 2 is a schematic cross-sectional view of a spectacle lens showing that the color of reflected light can differ between the air side and the substrate side. 3 is a graph showing simulated spectral reflectance distributions for the air side and the eyeball side of film configurations 1 and A. 4 is a graph showing simulated spectral reflectance distributions for the air side and the eyeball side of film configurations 2 and B. 5 is a graph showing simulated spectral reflectance distributions for the air side and the eyeball side of film configurations 3 and C. 6 is a graph showing measured spectral reflectance distributions for the air side and the eyeball side of Example 1 and Comparative Example 1. 7 is a graph showing measured spectral reflectance distributions for the air side and the eyeball side of Examples 2 and 3. 8 is a graph showing measured spectral reflectance distributions for the air side and the eyeball side of Comparative Example 2. 9 is a graph showing measured spectral reflectance distributions for the air side and the eyeball side of Comparative Examples 3 and 4. 10 is a graph showing measured spectral transmittance distributions for Examples 4 to 6. 11 is a graph showing measured spectral transmittance distributions for Comparative Examples 5 and 6. 10 is a graph showing measured spectral transmittance distributions according to Example 7 and Comparative Example 7.

[0009] Hereinafter, examples of embodiments of the present invention will be described with reference to the accompanying drawings. However, the embodiments are not limited to the following examples.

[0010] 1 is a schematic cross-sectional view of a spectacle lens 1 according to the present invention. The spectacle lens 1 according to the present invention has a substrate 2, an interposed film 3, and a multilayer film 4.

[0011] The substrate 2 is translucent. The substrate 2 is preferably a plastic lens substrate made of plastic. The substrate 2 may be formed from a material other than plastic, such as glass. The substrate 2 may also be formed from a plurality of materials, such as glass and plastic. A thermosetting resin is preferably used as the material for the substrate 2, such as a polyurethane resin, a thiourethane resin, a urethane-urea resin, an episulfide resin, a polycarbonate resin, a polyester resin, an acrylic resin, a polyethersulfone resin, a poly-4-methylpentene-1 resin, a diethylene glycol bisallyl carbonate resin, or any combination selected from these. The substrate 2 is preferably plate-shaped. A plate-shaped substrate 2 is also referred to as a substrate. The substrate 2 is a spectacle lens substrate. The spectacle lens substrate may or may not have a prescription. The spectacle lens substrate may be curved convexly toward the object side, may be flat, or may be curved convexly toward the eyeball side.

[0012] The multilayer film 4 is provided on one or more surfaces of the substrate 2. The multilayer film 4 is an optical multilayer film. The multilayer film 4 has anti-reflection properties and blue light blocking properties. The surface of the substrate 2 inside the multilayer film 4 is the film placement surface F. When multiple multilayer films 4 are provided, the opposing surfaces of the plate-shaped substrate 2 are preferably provided as the respective film placement surfaces F. For ease of explanation, the following description will mainly focus on the case where one multilayer film 4 is provided on one film placement surface F. Note that the multilayer film 4 may be provided on the film placement surface F of the plate-shaped substrate 2, and another type of film may be provided on the surface opposite the film placement surface F. The other type of film may be, for example, a dielectric multilayer film having anti-reflection properties, or a coating film that suppresses at least one of scratches and cracks. The multilayer film 4 is indirectly provided on the film placement surface F via an intervening film 3. The intervening film 3 is a hard coat film. The multilayer film 4 may be formed directly on the film placement surface F, or may be formed instead of or together with the hard coat film via another type of intervening film 3. When a plurality of multilayer films 4 are provided, the types of intervening films 3 added on the respective film placement surfaces F of the substrate 2 may be different from each other, or the presence or absence of an intervening film 3 may be different from each other. Whether the multilayer film 4 is provided directly or indirectly on the film placement surface F, it is disposed above the film placement surface F, i.e., on the atmospheric side.

[0013] The hard coat film is preferably formed by uniformly applying a hard coat liquid to the surface of the substrate 2. Furthermore, an organosiloxane-based resin containing inorganic oxide microparticles can be preferably used as the material for the hard coat film. In this case, the hard coat liquid is preferably prepared by mixing a solute composed mainly of an organosiloxane-based resin and an inorganic oxide microparticle sol with a water or alcohol-based solvent. The organosiloxane-based resin is preferably obtained by hydrolyzing and condensing an alkoxysilane. Specific examples of organosiloxane-based resins include γ-glycidoxypropyltrimethoxysilane, γ-glycidoxypropyltriethoxysilane, methyltrimethoxysilane, ethyl silicate, or a combination thereof. These alkoxysilane hydrolysis condensates are produced by hydrolyzing the alkoxysilane compound or any combination selected from them in an acidic aqueous solution such as hydrochloric acid. On the other hand, specific examples of inorganic oxide microparticles include sols of zinc oxide, silicon dioxide (silica), aluminum oxide, titanium oxide (titania), zirconium oxide (zirconia), tin oxide, beryllium oxide, antimony oxide, tungsten oxide, and cerium oxide, either singly or in combination. The diameter of the inorganic oxide microparticles is preferably 1 nm (nanometer) to 100 nm, more preferably 1 nm to 50 nm, from the viewpoint of ensuring the transparency of the hard coat film. Furthermore, the amount (concentration) of the inorganic oxide microparticles is preferably 40 wt% to 60 wt% (mass percent) of the total components of the hard coat film, from the viewpoint of ensuring an appropriate degree of at least one of hardness and toughness in the hard coat film. In addition, a curing catalyst such as acetylacetone metal salt and ethylenediaminetetraacetic acid metal salt may be added to the hard coat liquid. Furthermore, surfactants, colorants, and solvents may be added to the hard coat liquid as needed to ensure adhesion to the substrate 2 and facilitate formation. The physical thickness of the hard coat film is preferably 0.5 μm (micrometers) or more and 4.0 μm or less, and more preferably 1.0 μm or more and 3.0 μm or less.The lower limit of this film thickness range is determined because it is difficult to obtain sufficient hardness if the film is thinner than this. On the other hand, the upper limit is determined because a thicker film significantly increases the likelihood of physical property problems, such as cracking or brittleness. Furthermore, as the intervening film 3, a primer film may be added between the hard coat film and the surface of the substrate 2 in order to improve the adhesion of the hard coat film. Examples of materials for the primer film include polyurethane resins, acrylic resins, methacrylic resins, organosilicon resins, or any combination selected from these. The primer film is preferably formed by uniformly applying a primer liquid to the surface of the substrate 2. The primer liquid is preferably a liquid obtained by mixing the above-mentioned resin material and inorganic oxide fine particles in a water or alcohol-based solvent.

[0014] The multilayer film 4 includes one or more low refractive index layers 6, one or more high refractive index layers 8, an absorbing layer 10, and an antifouling layer 12. The antifouling layer 12 may be omitted. Alternatively, the antifouling layer 12 may be treated as an independent thin film rather than as a component of the multilayer film 4.

[0015] From the viewpoint of obtaining good antireflection properties, it is preferable that a plurality of low-refractive index layers 6 and a plurality of high-refractive index layers 8 are disposed, and that they are disposed alternately. Preferably, a total of five or more low-refractive index layers 6 and a total of four or more high-refractive index layers 8 are disposed. More preferably, a total of seven or more low-refractive index layers 6 and a total of six or more high-refractive index layers 8 are disposed. In FIG. 1 , the first layer of the multilayer film 4, which is the layer closest to the substrate 2, is the low-refractive index layer 6. Also, in FIG. 1 , the layer adjacent to the absorbing layer 10 on the substrate 2 side of the multilayer film 4 is the low-refractive index layer 6. Furthermore, in FIG. 1 , the layer adjacent to the absorbing layer 10 on the air side of the multilayer film 4 is the high-refractive index layer 8. The total number of low-refractive index layers 6 and high-refractive index layers 8 in the multilayer film 4 of FIG. 1 is five, which is an odd number. The configuration of the multilayer film 4 is not limited to that of the multilayer film 4 shown in Fig. 1. For example, the first layer of the multilayer film 4 may be a high refractive index layer 8. Also, the adjacent layer on the substrate 2 side of the absorbing layer 10 may be a high refractive index layer 8. Furthermore, the adjacent layer on the air side of the absorbing layer 10 may be a low refractive index layer 6. The total number of low refractive index layers 6 and high refractive index layers 8 may be four or less, or may be six or more.

[0016] The low refractive index layer 6 is preferably formed by vapor deposition of a low refractive index vapor deposition material. The low refractive index layer 6 is made of a low refractive index material. The low refractive index layer 6 is preferably made of a dielectric material. Examples of low refractive index materials include SiO ２ Silicon oxides including MgF ２ Examples of low refractive index materials include magnesium fluorides such as SiO ２ and Al ２ O ３ The high refractive index layer 8 may be a mixture or composite of two or more materials, such as a mixture of ZrO. The high refractive index layer 8 is preferably formed by vapor deposition of a high refractive index vapor deposition material. The high refractive index layer 6 is made of a high refractive index material. The high refractive index layer 8 is preferably made of a dielectric material. Examples of high refractive index materials include ZrO ２ Zirconium oxide, including TiO ２ Titanium oxide, Ta, ２ O５ Tantalum oxides such as Nb ２ O ５ Examples include niobium oxides such as niobium fluoride and niobium fluoride. The refractive index of the high refractive index layer 8 is, for example, 1.8 or higher. The high refractive index material may be a mixture or composite of two or more materials. Vapor deposition is preferably performed by vacuum deposition. Vapor deposition may also be performed with the assistance of at least one of oxygen ions and argon ions, or while performing plasma treatment. At least one of the low refractive index layer 6 and the high refractive index layer 8 may be formed by a method other than vapor deposition, such as sputtering.

[0017] The absorption layer 10 is made of SnO, which is fully oxidized Sn. ２ a layer containing SnO ２ The absorption layer 10 absorbs blue light in the visible range. The absorption layer 10 is preferably made of Sn or SnO. ２ The absorbing layer 10 is formed by vapor deposition using SnO as a vapor deposition source. Vapor deposition is preferably performed by vacuum deposition. Vapor deposition may also be performed while assisted by at least one of oxygen ions and argon ions, or while performing plasma treatment. The absorbing layer 10 may also be formed by a method other than vapor deposition, such as sputtering. The degree of oxidation of the absorbing layer 10 may vary depending on the film formation conditions, such as the vapor deposition conditions. From this perspective, the absorbing layer 10 is preferably formed by vapor deposition using SnO. ｚ (0<z≦2) ｚ The value of z is often large, about 1.8 or more. ｚ In the (0<z<2) layer, oxygen deficiency occurs. ｚ In the layer where z=2, no oxygen deficiency occurs. ｚ and SnO ｚThe z of the layer is set to 0<z≦2. Strictly speaking, determining z in the absorption layer 10 requires observing a large number of atoms using equipment such as an electron microscope and counting each type of atom, which is not practical because it requires a great deal of cost. The actual microscopic physical structure of the multilayer film 4 including the absorption layer 10 is not easily grasped even by those skilled in the art. Therefore, for example, the absorption layer 10 may be a layer formed by oxidizing Sn, or a layer formed by SnO ２ It can be expressed as a layer formed by generating oxygen deficiencies in the silicon dioxide.

[0018] The absorption layer 10 is SnO ｚ The greater the degree of oxygen deficiency in the layer, the greater the degree of blue light absorption. The degree of oxygen deficiency, i.e., the magnitude of (2-z), can be controlled with a predetermined precision by setting the film formation conditions. ２ When a layer containing SnO is formed for antistatic purposes, ２ In order to minimize the influence on optical performance caused by the addition of a layer containing SnO ２ In order to suppress the oxygen deficiency in the layer containing SnO as much as possible and to suppress the absorption of light as much as possible, ２ The deposition conditions for the layer containing SnO are set. The absorption layer 10 has a blue light blocking performance by absorption. ｚ provides the absorption layer 10 with blue light blocking properties. ｚ The SnO absorbing layer 10 is a substance that provides blue light blocking performance, i.e., a blue light blocking material. ｚ The refractive index of the layer is about 1.9 to 2.2 depending on the degree of oxygen deficiency. ｚ For example, in the absorber layer 10, SnO ｚ The mass % of the total mass of the absorbent layer 10 is preferably 50 mass % or more, and more preferably 80 mass % or more.

[0019] The absorbing layer 10 is preferably arranged in a layer other than the outermost layer and the next outermost layer in the multilayer film 4. The outermost layer is the layer farthest from the substrate 2, excluding the antifouling layer 12. The next outermost layer is the layer adjacent to the outermost layer on the substrate 2 side. In other words, the absorbing layer 10 is preferably not arranged as the outermost layer in the multilayer film 4. Furthermore, the absorbing layer 10 is preferably not arranged as the next outermost layer in the multilayer film 4. In the multilayer film 4, the absorbing layer 10 is preferably adjacent to the high refractive index layer 8 on the substrate 2 side. In other words, the layer adjacent to the absorbing layer 10 on the air side is preferably the high refractive index layer 8. In this case, the scratch resistance of the multilayer film 4 is improved, making the multilayer film 4 more resistant to scratches. Furthermore, from the viewpoint of further improving the scratch resistance of the multilayer film 4, the physical film thickness of the high refractive index layer 8 adjacent to the absorbing layer 10 on the air side is preferably 25 nm or more, more preferably 30 nm or more, and even more preferably 35 nm or more. In FIG. 1, the absorbing layer 10 is disposed adjacent to the high refractive index layer 8, which is the next outermost layer, on the substrate 2 side.

[0020] The preferred physical film thickness of the absorbing layer 10 is determined by balancing the need to ensure a predetermined level of blue light blocking performance and the need to prevent a decrease in anti-reflection performance. The larger the physical film thickness of the absorbing layer 10, the greater the amount of blue light absorbed and the greater the degree of blue light blocking. Furthermore, the larger the physical film thickness of the absorbing layer 10, the more difficult it becomes to design an anti-reflection function in combination with the low refractive index layer 6 and the high refractive index layer 8. Therefore, the lower limit of the preferred range of the physical film thickness of the absorbing layer 10 is, for example, 20 nm, 25 nm, 30 nm, or 35 nm. The upper limit of the preferred range of the physical film thickness of the absorbing layer 10 is, for example, 60 nm, 55 nm, 50 nm, or 45 nm.

[0021] The luminous reflectance of the spectacle lens 1 having the multilayer film 4 is preferably 2% or less, more preferably 1.5% or less, and even more preferably 1% or less, from the viewpoint of obtaining sufficient anti-reflection performance. The luminous reflectance is specified in JIS T 7334:2011. JIS T 7334:2011 is based on ISO 8980-4:2006. The average reflectance in the wavelength range of 400 nm to 500 nm, i.e., the average reflectance in the blue range, from the viewpoint of obtaining sufficient anti-reflection performance is preferably 2% or less, more preferably 1.5% or less, and even more preferably 1% or less, from the viewpoint of obtaining sufficient anti-reflection performance. The luminous transmittance of the spectacle lens 1 having the multilayer film 4 is preferably 85% or more, more preferably 90% or more, and even more preferably 95% or more, from the viewpoint of obtaining sufficient visibility while obtaining blue light blocking performance. The luminous transmittance is specified in JIS T 7333:2018. JIS T 7333:2018 is based on ISO 8980-3:2013.

[0022] The blue light blocking rate of the eyeglass lens 1 having the multilayer film 4, i.e., the blue light blocking rate, is preferably 10% or more, more preferably 14% or more, and even more preferably 20% or more, from the viewpoint of more fully reducing the strain on the eyes. In particular, when a substrate 2 having ultraviolet absorption properties is provided, the blue light blocking rate of the eyeglass lens 1 having the multilayer film 4 is preferably 14% or more. Furthermore, when a substrate 2 having absorption properties for light with a wavelength of 420 nm or less is provided, the blue light blocking rate of the eyeglass lens 1 having the multilayer film 4 is preferably 20% or more. The blue light blocking rate is calculated using the formula described in Appendix C of JIS T 7333:2011, based on the guidelines for blue light blocking rates established by the Japan Medical Optical Instruments Manufacturers' Association. That is, the blue light blocking rate is calculated by dividing the spectral transmittance τ by the blue light hazard function B(λ), which represents the irradiance distribution of sunlight and its radiation spectrum risk. ｓｂ is the value obtained by subtracting τ from 1. ｓｂis calculated in 5 nm steps for the wavelength range of 380 to 500 nm using the following equation 1: ｓｂ is similarly described as Solar blue-light transmittance in Annex E of ISO 8980-3:2022.

[0023]

[0024] Furthermore, as shown by the dashed lines in Figure 2, the absorption layer 10 blocks blue light, so the reflected light from the multilayer film 4 differs when viewed from the air side and the eye side. Even though the multilayer film 4 has an anti-reflection function, slight reflected light is observed, as is the case with general eyeglass lenses. In the multilayer film 4 disposed on the air-side surface of the substrate 2 in Figure 2, a low refractive index layer 6, a high refractive index layer 8, an absorption layer 10, and a low refractive index layer 6 are arranged in this order from the outermost layer toward the substrate 2. In the multilayer film 4 in Figure 2, when viewed from the air side, reflected light R1 at the air-side interface I1 of the outermost layer, reflected light R2 at the interface I2 between the outermost layer and the next-outermost layer, and reflected light R3 at the interface I3 of the next-outermost layer toward the substrate 2 are not absorbed by the absorption layer 10 and are generated relatively strongly. On the other hand, due to absorption in the absorbing layer 10, reflected light R4 at interface I4 on the substrate 2 side of the absorbing layer 10 and reflected light R5 at interface I5 of the low refractive index layer 6 on the substrate 2 side are generated relatively weakly. On the other hand, when viewed from the eyeball side, reflected light R6 at interface I5 and reflected light R7 at interface I4 are generated relatively strongly. On the other hand, reflected light R8 at interface I3, reflected light R9 at interface I2, and reflected light R10 at interface I5 are generated relatively weakly. Therefore, when the absorbing layer 10 is present, the color of reflected light when viewed from the air side of the multilayer film 4 differs from the color of reflected light when viewed from the eyeball side.

[0025] Such color differences can be suppressed by the design of the multilayer film 4. For example, if the absorbing layer 10 is disposed closer to the substrate 2 than the high refractive index layer 8, which is closest to the atmosphere, the color differences can be suppressed. Furthermore, in the multilayer film 4, the arrangement of the low refractive index layer 6 and the high refractive index layer 8 on the atmosphere side of the absorbing layer 10 can be substantially equivalent to the arrangement of the low refractive index layer 6 and the high refractive index layer 8 on the substrate 2 side of the absorbing layer 10. Furthermore, in the multilayer film 4, the color differences can be suppressed by making the sum of the physical film thicknesses of the low refractive index layers 6 on the atmosphere side of the absorbing layer 10 substantially equivalent to the sum of the physical film thicknesses of the low refractive index layers 6 on the substrate 2 side of the absorbing layer 10, and by making the sum of the physical film thicknesses of the high refractive index layers 8 on the atmosphere side of the absorbing layer 10 substantially equivalent to the sum of the physical film thicknesses of the high refractive index layers 8 on the substrate 2 side of the absorbing layer 10.

[0026] From the viewpoint of sufficiently suppressing color differences, it is preferable that in the multilayer film 4, the absolute value of the difference between the color x of the reflected light viewed from the air side and the color x of the reflected light viewed from the eyeball side at x in the xy chromaticity diagram of the CIE 1931 XYZ color system is within 0.04. Also, it is preferable that in the multilayer film 4, the absolute value of the difference between the color y of the reflected light viewed from the air side and the color y of the reflected light viewed from the eyeball side at y in the xy chromaticity diagram is within 0.06. Furthermore, from the viewpoint of obtaining green reflected light, which is preferred for the spectacle lens 1, in both the cases of viewing from the air side and the eyeball side, it is preferable that in the multilayer film 4, both colors of reflected light are within the ranges of 0.10≦x≦0.25 and 0.35≦y≦0.60, or both are within the ranges of 0.25≦x≦0.35 and 0.40≦y≦0.60.

[0027] The antifouling layer 12 is disposed on the absorbing layer 10, i.e., on the atmospheric side of the absorbing layer 10. The antifouling layer 12 imparts an antifouling function to the eyeglass lens 1. The antifouling function includes at least one of a water-repellent function and an oil-repellent function. The antifouling layer 12 is formed by a known manufacturing method such as a vapor deposition method or an ion sputtering method.

[0028] The antifouling layer 12 is formed by polycondensation of, for example, an organosilicon compound. Polycondensation allows the coating to be thickened and dense, and improves adhesion to adjacent layers and surface hardness in the multilayer film 4. The organosilicon compound before polycondensation is preferably -SiR ｙ X ３－ｙ where R is a monovalent organic group, X is a hydrolyzable group, and y is an integer from 0 to 2. Examples of X include —OCH ３ , -OCH ２ CH ３ Alkoxy groups such as —OCOCH ３ acyloxy groups such as -ON=CR ａ R ｂ ketoxime groups such as -Cl and -Br, halogen groups such as -NR ｃ R ｄ Examples of amino groups include: ａ , R ｂ , R ｃ , R ｄ Each of the symbols represents a monovalent organic group. A fluorine-containing organosilicon compound is suitable as such an organosilicon compound. Fluorine-containing organosilicon compounds are comprehensively excellent in water and oil repellency, electrical insulation, mold releasability, solvent resistance, lubricity, heat resistance, and defoaming properties. In particular, organosilicon compounds with a relatively large molecular weight of approximately 1,000 to 50,000 and containing a perfluoroalkyl group or perfluoropolyether group in the molecule have excellent antifouling properties. Therefore, the antifouling layer 12 obtained by polycondensing a fluorine-containing organosilicon compound has water and oil repellency. Therefore, by using a fluorine-containing organosilicon compound in forming the antifouling layer 12, a coating with excellent wipeability can be easily obtained.

[0029] As described above, the multilayer film 4 imparts optical functions and optical characteristics to the eyeglass lens 1. The optical functions are at least one of an anti-reflection function and a blue light blocking function. The optical characteristics are at least one of an anti-reflection characteristic and a blue light blocking characteristic. Furthermore, the anti-fouling layer 12 of the multilayer film 4 imparts anti-fouling functions and characteristics to the eyeglass lens 1.

[0030] Therefore, eyeglasses made using the eyeglass lens 1 have the functions that the eyeglass lens 1 has.

[0031] Examples belonging to the present invention are given below, which are not intended to limit the scope of the present invention.

[0032] First, for the multilayer film 4, the spectral reflectance distribution in the visible range was calculated for film configurations 1 to 3 and film configurations A to C by computer simulation. The visible range was set to 380 nm or more and 780 nm or less. The visible range may be outside the above range. For example, the lower limit of the visible range may be 390 nm, 400 nm, 410 nm, or 420 nm. The upper limit of the visible range may be 800 nm, 760 nm, 740 nm, or 700 nm. The materials and physical film thicknesses of each layer in film configurations 1 to 3 and film configurations A to C are shown in Table 1 below.

[0033]

[0034] The substrate 2 on which film configurations 1 to 3 were formed and the substrate 2 on which film configurations A to C were formed were the same. The refractive index of the substrate 2 was 1.60. The material of the substrate 2 was equivalent to a thiourethane resin. The thickness of the substrate 2 was 1.8 mm. The substrate 2 was a spectacle lens substrate, and was a convex lens with a diopter of S-0.00. The extinction coefficient of the substrate 2 was set according to the ultraviolet absorption properties of ultraviolet absorbers for general spectacle lens substrates. The intervening films 3 interposed between the film configurations 1 to 3 and the substrate 2 and the intervening films 3 interposed between the film configurations A to C and the substrate 2 were the same. The intervening film 3 was a hard coat film. The refractive index of the intervening film 3 was 1.60. The material of the intervening film 3 was equivalent to a thermosetting silicone resin. The physical film thickness of the intervening film 3 was 2.0 μm. The antifouling layer 12 was the same in film configurations 1 to 3 and film configurations A to C. The antifouling layer 12 was equivalent to a general water-repellent film. The refractive index of the antifouling layer 12 at a wavelength of 500 nm was 1.35. Film configurations 1 to 3 and film configurations A to C were formed only on the convex surface of the substrate 2, i.e., the surface of the substrate 2 facing the atmosphere. No film was formed on the concave surface of the substrate 2, i.e., the surface facing the eyeball.

[0035] In the film configurations 1 to 3 and the film configurations A to C, the low refractive index layer 6 is made of SiO ２ The layer is made of SiO ２ It was considered to correspond to a SiO layer. ２ The refractive index of the layer at a wavelength of 500 nm was set to 1.47. ２ The extinction coefficient of the layer is ２ In the film configurations 1 to 3 and film configurations A to C, the high refractive index layer 8 is made of ZrO ２ ZrO ２ It was considered to correspond to a ZrO layer. ２ The refractive index of the layer at a wavelength of 500 nm was 2.11. ２ The extinction coefficient of the layer is ２ Furthermore, in the film configurations 1 to 3 and the film configurations A to C, the SnO ｚThe refractive index of the layer at a wavelength of 500 nm was 2.18. ｚ The extinction coefficients of the layers were 0.0937 at a wavelength of 450 nm, 0.0608 at a wavelength of 500 nm, 0.0369 at a wavelength of 550 nm, and 0.0205 at a wavelength of 600 nm. In film configurations 1 to 3 and film configurations A to C, the physical film thickness of the absorbing layer 10 was 40 nm. When the absorbing layer 10 is actually formed, if the absorbing layer 10 has such a physical film thickness, blue light blocking performance that sufficiently reduces eye strain can be obtained. In film configurations 1 to 3 and film configurations A to C, the number of layers in the multilayer film 4 was seven. The layer closest to the substrate 2 in the multilayer film 4 was the first layer, and the seventh layer, the layer closest to the atmosphere, was the antifouling layer 12. In addition, the configuration of the multilayer film 4 excluding the antifouling layer 12 and the absorbing layer 10 was such that the first layer was made of SiO ２ SiO layer ２ layer and ZrO ２ It was made into an alternating film of layers.

[0036] In the film configurations 1 to 3, the absorption layer 10 was disposed as the fourth layer. The layer adjacent to the absorption layer 10 on the air side was ZrO ２ In film configurations 1 to 3, the absorbing layer 10 was not disposed on the outermost layer, which is the layer closest to the atmosphere, except for the antifouling layer 12. In addition, the absorbing layer 10 was not disposed on the next outermost layer adjacent to the outermost layer on the substrate 2 side. In film configurations A to C, the absorbing layer 10 was disposed on the fifth layer. The layer adjacent to the absorbing layer 10 on the atmosphere side was made of SiO ２ In the film configurations A to C, the absorbing layer 10 was disposed as the next outermost layer.

[0037] The simulation results for such film configurations 1 to 3 and film configurations A to C are shown in Figures 3, 4, and 5, as well as Table 2 below. The luminous reflectance was calculated with a D65 light source and a 2° visual angle.

[0038]

[0039] In film configurations A to C, the difference between the color of reflected light seen from the air side (i.e., air-side reflected color) and the color of reflected light seen from the eyeball side (i.e., eyeball-side reflected color) is relatively larger than in film configurations 1 to 3. In film configurations A and C, the absolute value of the difference between the x of the air-side reflected color and the x of the eyeball-side reflected color exceeds 0.04. Furthermore, in film configurations A to C, the absolute value of the difference between the y of the air-side reflected color and the y of the eyeball-side reflected color exceeds 0.06. For the eyeball-side reflected color of film configurations A to C, the y is outside the range of x and y described above for green, which is generally preferred as the color of reflected light from eyeglass lenses. The luminous reflectance of the air-side reflected color and the luminous reflectance of the eyeball-side reflected color of film configurations A to C are both 2% or less. The average reflectance in the blue region of the eyeball-side reflected color of film configurations A and C exceeds 2%.

[0040] In film configurations 1 to 3, the difference between the air-side reflected color and the eye-side reflected color is more suppressed than in film configurations A to C. In film configurations 1 to 3, the absolute value of the difference between the x of the air-side reflected color and the x of the eye-side reflected color is within 0.04. Furthermore, in film configurations 1 to 3, the absolute value of the difference between the y of the air-side reflected color and the y of the eye-side reflected color is within 0.06. For x and y in film configurations 1 to 3, both the air-side reflected color and the eye-side reflected color are within the above-mentioned x and y ranges associated with green, which is generally preferred as the color of reflected light from eyeglass lenses. The luminous reflectance of the air-side reflected color and the luminous reflectance of the eye-side reflected color in film configurations 1 to 3 are both 2% or less. The average reflectance of the blue region of the air-side reflected color and the average reflectance of the blue region of the eye-side reflected color in film configurations 1 to 3 are both 2% or less.

[0041] Furthermore, Examples 1 to 3 were prepared by actually forming the multilayer films 4 according to Membrane Configurations 1 to 3, as well as the substrate 2 and interposed film 3 described above. Comparative Example 1 was also prepared by actually forming the multilayer film 4 according to Membrane Configuration A, as well as the substrate 2 and interposed film 3 described above. The multilayer films 4 according to Membrane Configurations 1 to 3 and A were formed on the atmospheric side of the interposed film 3. In Examples 1 to 3 and Comparative Example 1, no film was formed on the eyeball-side surface of the substrate 2. More specifically, the interposed film 3 of Examples 1 to 3 and Comparative Example 1 was prepared as follows: 206 g (grams) of methanol, 300 g of methanol-dispersed titania sol (manufactured by JGC Catalysts and Chemicals, Ltd., solids content 30%), 60 g of γ-glycidoxypropyltrimethoxysilane, 30 g of γ-glycidoxypropylmethyldiethoxysilane, and 60 g of tetraethoxysilane were dropped into a reaction vessel, and a 0.01 N aqueous hydrochloric acid solution was added dropwise to the mixture and stirred to perform hydrolysis. Next, 0.5 g of a flow control agent and 1.0 g of a catalyst are added, and the mixture is stirred at room temperature for 3 hours to form a hard coating solution. This hard coating solution is applied to the air-facing surface of the substrate 2, and then heated and cured at 120°C for 1.5 hours to form a hard coating film with a thickness of 2.0 μm.

[0042] In each of Examples 1 to 3 and Comparative Example 1, the low refractive index layer 6, i.e., SiO ２ The layer is SiO ２ Furthermore, in each of Examples 1 to 3 and Comparative Example 1, the high refractive index layer 8, i.e., ZrO ２ The layer is ZrO ２ In addition, in each of Examples 1 to 3 and Comparative Example 1, the absorbing layer 10, i.e., SnO Ｚ The layer is SnO ２ is deposited as the deposition material.

[0043] As Comparative Example 2, a multilayer film 4 having film structure D associated with a general antifouling antireflection film, as shown in Table 3 below, was actually formed in the same arrangement of the substrate 2, interposed film 3, and multilayer film 4 as in Examples 1 to 3 and Comparative Example 1. Furthermore, as Comparative Example 3, a multilayer film 4 having film structure E associated with a general reflective blue light cutting film, as shown in Table 3 below, was actually formed in the same arrangement of the substrate 2, interposed film 3, and multilayer film 4 as in Examples 1 to 3 and Comparative Example 1. Furthermore, as Comparative Example 4, a multilayer film 4 having film structure F associated with a general reflective blue light cutting film, as shown in Table 3 below, was actually formed in the same arrangement of the substrate 2, interposed film 3, and multilayer film 4 as in Examples 1 to 3 and Comparative Example 1.

[0044]

[0045] Then, the average reflectance in the blue region, the luminous reflectance in a 2° field of view with a D65 light source, and x and y were actually measured for the reflected light as seen from the air side and the reflected light as seen from the eyeball side in Examples 1 to 3 and Comparative Examples 1 to 4. The actual center thickness of the substrate 2 in Examples 1 to 3 and Comparative Examples 1 to 4 was also actually measured. The following Table 4 shows the measurement results.

[0046]

[0047] Furthermore, the spectral reflectance distributions were actually measured for the reflected light seen from the air side and the reflected light seen from the eyeball side for Examples 1 to 3 and Comparative Examples 1 to 4. The measurement results are shown in Figures 6, 7, 8, and 9.

[0048] Examples 1 to 3 and Comparative Example 1 have the same performance, such as the air-side reflected color and eye-side reflected color, as the simulations for the corresponding film configurations 1 to 3 and film configuration A. Comparative Example 2, which has film configuration D relating to a general anti-reflection film, does not have a layer that absorbs visible light, so the air-side reflected color and eye-side reflected color are very similar. However, Comparative Example 2 does not have blue light blocking performance. Comparative Examples 3 and 4, which have film configurations E and F relating to films that reflect blue light, have a high average reflectance in the blue range, and the air-side reflected color and eye-side reflected color are blue rather than green.

[0049] Furthermore, a scratch resistance test was conducted using Examples 1 to 3 and Comparative Examples 1 and 2 as test subjects. The scratch resistance test included a normal test and an accelerated test. In the normal test, steel wool #000 was pressed against the surface of the test subject facing the multilayer film 4 with a load of 2 kg (kilograms), and reciprocated 100 times at a speed of 2.5 seconds per reciprocation. The test subject was then illuminated by a white LED light source 3 m (meters) away, and the number of scratches visible in the center of the reciprocating area was counted. Furthermore, depending on the number of scratches, a rating of "◎" was given for 0 to 1 scratch, a rating of "○" for 2 to 3 scratches, and a rating of "△" for 4 or more scratches. In the accelerated test, the test object was first placed in a Sunshine Weather Meter (S80B manufactured by Suga Test Instruments Co., Ltd.) under conditions of a temperature of 60°C and a humidity of 50% RH for 60 hours, and then, as in the normal test, steel wool #000 was applied to the test object, and the number of scratches was counted and evaluated. The results of the scratch resistance test are shown in Table 5 below.

[0050]

[0051] In Examples 1 to 3, SnO Ｚ The layer is ZrO ２ In Examples 1 and 3, the SnO Ｚ The layer is ZrO ２ The number of scratches is smaller and the scratch resistance is better than when the SnO Ｚ The thickness of the layer adjacent to the SnO layer on the air side is also affected. Ｚ The layer adjacent to the SnO layer on the air side has a physical film thickness of 10 nm, which is thinner than those of Examples 1 and 3, and the scratch resistance of Example 2 is relatively low. Ｚ The scratch resistance of Example 3, in which the layer adjacent to the SnO layer on the air side has a physical film thickness of 30 nm, is sufficient, and the scratch resistance of Example 1, in which the physical film thickness is 60 nm, is even more sufficient. Ｚ The layer is ZrO ２ The layer is disposed on the substrate 2 side, and ZrO ２It is preferable that the physical thickness of the layer is 30 nm or more.

[0052] Furthermore, as shown in Table 6 below, Examples 4 to 6 and Comparative Examples 5 to 6 were formed by actually forming film configurations 1 to 3 and D to F on the atmosphere-side and eyeball-side surfaces of the substrate 2. The substrate 2 in Examples 4 to 6 and Comparative Examples 5 to 6 is the same as that in Examples 1 to 3 and Comparative Examples 1 to 4. In Examples 4 to 6, an absorptive blue light-cutting film is disposed on the atmosphere-side surface of the substrate 2, and an anti-reflection film is disposed on the eyeball-side surface of the substrate 2. In Comparative Example 5, an anti-reflection film is disposed on each of the atmosphere-side and eyeball-side surfaces of the substrate 2. In Comparative Example 6, a reflective blue light-cutting film is disposed on each of the atmosphere-side and eyeball-side surfaces of the substrate 2.

[0053]

[0054] As shown in Table 6, the substrate center thickness, luminous transmittance, and blue light blocking rate were actually measured for Examples 4 to 6 and Comparative Examples 5 to 6. Furthermore, as shown in Figures 10 and 11, the spectral transmittance distributions in the visible and adjacent ranges for Examples 4 to 6 and Comparative Examples 5 to 6 were actually measured. Comparative Example 5 had excellent luminous transmittance but a low blue light blocking rate. Comparative Example 6 had a sufficient blue light blocking rate of 14% or more and a sufficient luminous transmittance of 90% or more. However, Comparative Example 6 had relatively stronger reflected light than the other Examples and Comparative Examples, and the reflected color was blue. In Examples 4 to 6, the blue light blocking rate was 14% or more and a sufficient luminous transmittance of 90% or more. Furthermore, in Examples 4 to 6, the reflected light was relatively weak and the reflected color was green. Furthermore, in Examples 4 to 6, the air-side reflected color and the eyeball-side reflected color were similar.

[0055] In addition, as shown in Table 7 below, film configurations 1 and D to F were actually formed on the air-side and eyeball-side surfaces of the substrate 2, resulting in Example 7 and Comparative Example 9. The substrate 2 of Example 7 and Comparative Example 7 differs from the substrate 2 of Examples 1 to 6 and Comparative Examples 1 to 6. The substrate 2 of Example 7 and Comparative Example 7 contains a blue light absorbing material, which is a substance that absorbs a portion of blue light (light on the short wavelength side of the blue range). Except for the inclusion of such a blue light absorbing material, the substrate 2 of Example 7 and Comparative Example 7 is similar to the substrate 2 of Examples 1 to 6 and Comparative Examples 1 to 6. In Example 7, an absorptive blue light cutting film is disposed on the air-side surface of the blue light-absorbing substrate 2, and an anti-reflective film is disposed on the eyeball-side surface of the substrate 2. In Comparative Example 7, a reflective blue light cutting film is disposed on each of the air-side and eyeball-side surfaces of the substrate 2.

[0056]

[0057] As shown in Table 7, the substrate center thickness, luminous transmittance, and blue light blocking rate were actually measured for Example 7 and Comparative Example 7. Furthermore, as shown in FIG. 12, the spectral transmittance distributions in the visible range and adjacent range for Example 7 and Comparative Example 7 were actually measured. Comparative Example 7 had a sufficient blue light blocking rate of 20% or more, while the luminous transmittance was also sufficient at 90% or more. However, Comparative Example 7 had relatively stronger reflected light than the other Examples and Comparative Examples, and the reflected color was blue. Example 7 had a sufficient blue light blocking rate of 20% or more, while the luminous transmittance was also sufficient at 90% or more. Furthermore, Example 7 had relatively weaker reflected light than the other Examples and Comparative Examples, and the reflected color was green. Furthermore, in Example 7, the air-side reflected color and the eyeball-side reflected color were similar.

[0058] The following mainly summarizes the configurations and effects of Examples 1 to 7. The spectacle lenses 1 of Examples 1 to 7 include a substrate 2 and a multilayer film 4 indirectly disposed on the film-arrangement surface F of the substrate 2. The multilayer film 4 includes one or more low-refractive index layers 6, one or more high-refractive index layers 8, and an absorbing layer 10. The absorbing layer 10 is made of SnO ｚ(0<z≦2). The absorbing layer 10 is disposed closer to the substrate 2 than the high refractive index layer 8, which is closest to the atmosphere. This provides the eyeglass lens 1 that has sufficient scratch resistance, visibility, and reduced eye strain.

[0059] Furthermore, the absorbing layer 10 in Examples 1 to 7 is adjacent to the high refractive index layer 8 closest to the atmosphere. This provides a spectacle lens 1 with even better scratch resistance. Furthermore, in Examples 1, 3 to 4, and 6 to 7, the physical film thickness of the high refractive index layer 8 closest to the atmosphere is 30 nm or more. This provides a spectacle lens 1 with even better scratch resistance.

[0060] Additionally, the average reflectance in the wavelength range of 400 nm or more and 500 nm or less for Examples 1 to 7 is 2% or less. Therefore, a spectacle lens 1 having even better visibility and good appearance is provided. Furthermore, the luminous reflectance for Examples 1 to 7 is 2% or less. Therefore, a spectacle lens 1 having even better visibility and good appearance is provided. Furthermore, the luminous transmittance for Examples 1 to 7 is 90% or more. Therefore, a spectacle lens 1 having even better visibility is provided.

[0061] Furthermore, the blue light blocking rate in Examples 1 to 7 is 14% or more. Therefore, a spectacle lens 1 is provided that can further reduce eye strain. Furthermore, in Example 7, the blue light blocking rate is 20% or more, and the substrate 2 contains a blue light absorbing material. Therefore, in cooperation with the substrate 2, a spectacle lens 1 is provided that can further reduce eye strain. Furthermore, in Examples 1 to 7, the physical film thickness of the absorption layer 10 is 40 nm, which is 60 nm or less. Therefore, a spectacle lens 1 that has sufficient visibility while reducing eye strain is provided.

[0062] In addition, the high refractive index layer 8 in Examples 1 to 7 was made of ZrO ２ The low refractive index layer 6 in Examples 1 to 7 is a SiO ２layer. Therefore, the multilayer film 4 can be formed more easily. Furthermore, the multilayer films 4 of Examples 1 to 7 are provided with an antifouling layer 12 that exhibits at least one of water repellency and oil repellency. The antifouling layer 12 is disposed closer to the atmosphere than the absorbing layer 10. Furthermore, the antifouling layer 12 is a fluorine-containing organosilicon compound. Therefore, a spectacle lens 1 with even more antifouling properties is provided. Furthermore, the substrate 2 of Examples 1 to 7 is made of plastic. Therefore, a spectacle lens 1 that is even easier to handle is provided. Furthermore, the multilayer films 4 of Examples 1 to 7 are formed via a hard coat film that is the intervening film 3. Therefore, a spectacle lens 1 that is even easier to handle is provided.

[0063] The eyeglass lenses 1 of Examples 1 to 7 each include a substrate 2 and a multilayer film 4 indirectly disposed on the film-arrangement surface F of the substrate 2. The multilayer film 4 includes one or more low-refractive index layers 6, one or more high-refractive index layers 8, and an absorbing layer 10. The absorbing layer 10 is made of SnO ｚ (0<z≦2). The absorbing layer 10 is not disposed in the outermost layer of the multilayer film 4, which is the layer closest to the atmosphere, nor is it disposed in the next outermost layer, which is the layer adjacent to the outermost layer on the substrate 2 side. Therefore, the spectacle lens 1 is provided which has sufficient scratch resistance, visibility, and reduced eye strain.

[0064] Furthermore, the spectacle lenses 1 of Examples 1 to 7 include a substrate 2 and a multilayer film 4 indirectly disposed on the film-arrangement surface F of the substrate 2. The multilayer film 4 includes one or more low-refractive index layers 6, one or more high-refractive index layers 8, and an absorbing layer 10. The absorbing layer 10 is made of SnO ｚ (0<z≦2). The absorbing layer 10 is disposed closer to the substrate 2 than the low refractive index layer 6 closest to the atmosphere, and is disposed closer to the substrate 2 than the high refractive index layer 8 closest to the atmosphere. Thus, the spectacle lens 1 is provided that provides sufficient scratch resistance, visibility, and reduced eye strain.

[0065] 1... eyeglass lens, 2... substrate, 3... interposed film (hard coat film), 4... multilayer film (absorption type blue light cut film), 6... low refractive index layer, 8... high refractive index layer, 10... absorption layer, 12... antifouling layer, F... film arrangement surface.

Claims

1. A multilayer film comprising a substrate and a multilayer film disposed directly or indirectly on a film-arrangement surface of the substrate, the multilayer film including one or more low refractive index layers, one or more high refractive index layers, and an absorption layer, the absorption layer being made of SnO ｚ (0<z≦2), and disposed closer to the substrate than the high refractive index layer closest to the atmosphere.

2. The eyeglass lens according to claim 1, wherein the absorption layer is adjacent to the high refractive index layer closest to the atmosphere.

3. The eyeglass lens according to claim 1, characterized in that the physical film thickness of the high refractive index layer closest to the atmosphere is 30 nm or more.

4. The eyeglass lens according to claim 1, wherein the physical film thickness of the absorption layer is 60 nm or less.

5. The eyeglass lens according to claim 1, characterized in that the average reflectance in the wavelength range of 400 nm or more and 500 nm or less is 2% or less.

6. The eyeglass lens according to claim 1, characterized in that the luminous reflectance is 2% or less.

7. The eyeglass lens according to claim 1, characterized in that it has a luminous transmittance of 90% or more.

8. The eyeglass lens according to claim 1, characterized in that it has a blue light blocking rate of 14% or more.

9. The eyeglass lens according to claim 1, characterized in that the blue light blocking rate is 20% or more, and the substrate contains a blue light absorbing material.

10. The high refractive index layer is made of ZrO ２ The spectacle lens according to claim 1 , characterized in that it is a layer.

11. The low refractive index layer is made of SiO ２ The spectacle lens according to claim 1 , characterized in that it is a layer.

12. The eyeglass lens according to claim 1, characterized in that the multilayer film has an antifouling layer that exhibits at least one of water repellency and oil repellency, and the antifouling layer is disposed closer to the atmosphere than the absorption layer.

13. The eyeglass lens according to claim 12, wherein the antifouling layer is a fluorine-containing organic silicon compound.

14. The eyeglass lens according to claim 1, wherein the substrate is made of plastic.

15. The eyeglass lens according to claim 1, wherein the multilayer film is formed via a hard coat film.

16. A multilayer film comprising: a substrate; and a multilayer film disposed directly or indirectly on a film-arrangement surface of the substrate, wherein the multilayer film includes one or more low refractive index layers, one or more high refractive index layers, and an absorbing layer, and the absorbing layer is made of SnO ｚ (0<z≦2), and is not disposed in the outermost layer, which is the layer closest to the atmosphere in the multilayer film, and is not disposed in the next outermost layer, which is the layer adjacent to the outermost layer on the side of the substrate.

17. A multilayer film comprising: a substrate; and a multilayer film disposed directly or indirectly on a film-arrangement surface of the substrate, wherein the multilayer film includes one or more low refractive index layers, one or more high refractive index layers, and an absorbing layer, and the absorbing layer is made of SnO ｚ (0<z≦2), and is disposed closer to the substrate than the low refractive index layer closest to the atmosphere, and is disposed closer to the substrate than the high refractive index layer closest to the atmosphere.

18. Eyeglasses comprising the eyeglass lenses according to any one of claims 1 to 17.

Images