WO2019065989A1 - 眼鏡レンズおよび眼鏡 - Google Patents
眼鏡レンズおよび眼鏡 Download PDFInfo
- Publication number
- WO2019065989A1 WO2019065989A1 PCT/JP2018/036302 JP2018036302W WO2019065989A1 WO 2019065989 A1 WO2019065989 A1 WO 2019065989A1 JP 2018036302 W JP2018036302 W JP 2018036302W WO 2019065989 A1 WO2019065989 A1 WO 2019065989A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- layer
- spectacle lens
- lens
- blue light
- film
- Prior art date
Links
Images
Classifications
-
- G—PHYSICS
- G02—OPTICS
- G02C—SPECTACLES; SUNGLASSES OR GOGGLES INSOFAR AS THEY HAVE THE SAME FEATURES AS SPECTACLES; CONTACT LENSES
- G02C7/00—Optical parts
- G02C7/10—Filters, e.g. for facilitating adaptation of the eyes to the dark; Sunglasses
-
- G—PHYSICS
- G02—OPTICS
- G02C—SPECTACLES; SUNGLASSES OR GOGGLES INSOFAR AS THEY HAVE THE SAME FEATURES AS SPECTACLES; CONTACT LENSES
- G02C7/00—Optical parts
- G02C7/02—Lenses; Lens systems ; Methods of designing lenses
- G02C7/08—Auxiliary lenses; Arrangements for varying focal length
- G02C7/088—Lens systems mounted to spectacles
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B1/00—Optical elements characterised by the material of which they are made; Optical coatings for optical elements
- G02B1/04—Optical elements characterised by the material of which they are made; Optical coatings for optical elements made of organic materials, e.g. plastics
- G02B1/041—Lenses
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B1/00—Optical elements characterised by the material of which they are made; Optical coatings for optical elements
- G02B1/10—Optical coatings produced by application to, or surface treatment of, optical elements
- G02B1/11—Anti-reflection coatings
- G02B1/113—Anti-reflection coatings using inorganic layer materials only
- G02B1/115—Multilayers
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B1/00—Optical elements characterised by the material of which they are made; Optical coatings for optical elements
- G02B1/10—Optical coatings produced by application to, or surface treatment of, optical elements
- G02B1/11—Anti-reflection coatings
- G02B1/113—Anti-reflection coatings using inorganic layer materials only
- G02B1/115—Multilayers
- G02B1/116—Multilayers including electrically conducting layers
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B5/00—Optical elements other than lenses
- G02B5/20—Filters
- G02B5/22—Absorbing filters
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B5/00—Optical elements other than lenses
- G02B5/20—Filters
- G02B5/22—Absorbing filters
- G02B5/223—Absorbing filters containing organic substances, e.g. dyes, inks or pigments
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B5/00—Optical elements other than lenses
- G02B5/20—Filters
- G02B5/28—Interference filters
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B5/00—Optical elements other than lenses
- G02B5/20—Filters
- G02B5/28—Interference filters
- G02B5/285—Interference filters comprising deposited thin solid films
-
- G—PHYSICS
- G02—OPTICS
- G02C—SPECTACLES; SUNGLASSES OR GOGGLES INSOFAR AS THEY HAVE THE SAME FEATURES AS SPECTACLES; CONTACT LENSES
- G02C7/00—Optical parts
- G02C7/10—Filters, e.g. for facilitating adaptation of the eyes to the dark; Sunglasses
- G02C7/104—Filters, e.g. for facilitating adaptation of the eyes to the dark; Sunglasses having spectral characteristics for purposes other than sun-protection
-
- G—PHYSICS
- G02—OPTICS
- G02C—SPECTACLES; SUNGLASSES OR GOGGLES INSOFAR AS THEY HAVE THE SAME FEATURES AS SPECTACLES; CONTACT LENSES
- G02C7/00—Optical parts
- G02C7/10—Filters, e.g. for facilitating adaptation of the eyes to the dark; Sunglasses
- G02C7/107—Interference colour filters
-
- G—PHYSICS
- G02—OPTICS
- G02C—SPECTACLES; SUNGLASSES OR GOGGLES INSOFAR AS THEY HAVE THE SAME FEATURES AS SPECTACLES; CONTACT LENSES
- G02C7/00—Optical parts
- G02C7/10—Filters, e.g. for facilitating adaptation of the eyes to the dark; Sunglasses
- G02C7/108—Colouring materials
Definitions
- the present invention relates to an eyeglass lens and an eyeglass provided with the eyeglass lens.
- the monitor screen of digital devices has been replaced by a CRT instead of a liquid crystal
- an LED liquid crystal has been widely used, but a liquid crystal monitor, particularly an LED liquid crystal monitor strongly emits short wavelength light called blue light. Therefore, in order to effectively reduce eyestrain and eye pain that occur when the digital device is used for a long time, measures should be taken to reduce the burden on the eye due to blue light.
- light in a wavelength range of 400 to 500 nm or light in the vicinity of this wavelength range is called blue light.
- Patent Document 1 proposes an optical article having a multilayer film having a property of selectively reflecting light having a wavelength of 400 to 450 nm on the surface of a plastic substrate.
- Patent Document 1 As a means for reducing the burden on the eye by blue light, as described in Patent Document 1 as a spectacle lens, a multilayer having a property of selectively reflecting blue light on the surface of a lens substrate Providing a membrane is mentioned.
- a multilayer film having the property of selectively reflecting blue light is provided on the surface of the lens substrate, the amount of blue light entering the eye of the eyeglass wearer via the eyeglass lens can be reduced, but wearing eyeglasses There is a tendency for the person's vision to be yellowish (hereinafter, also simply described as "yellowish”). This is because the ratio of green light to red light is relatively increased by selectively blocking blue light among light of various wavelengths in the visible region, resulting in the yellowness of a mixture of red and green. This is to facilitate visual recognition.
- an object of one embodiment of the present invention is to provide a spectacle lens that can reduce the burden on the eye due to blue light and that can reduce yellowishness.
- a lens substrate comprising a blue light absorbing compound, A multilayer film including a metal layer having a thickness of 1.0 to 10.0 nm, Have The blue light cut rate is 21.0% or more, The average reflectance in the wavelength range of 400 to 500 nm measured on the object side surface is 1.00% or less, and the average reflectance in the wavelength range of 400 to 500 nm measured on the eye side surface is 1.00% or less Is a spectacle lens, About.
- the above-mentioned spectacle lens is a spectacle lens which contains a blue light absorptive compound in a lens base material, and the blue light cut rate is 21.0% or more. Since blue light can be cut off with such a high blue light cut rate, according to the above-mentioned spectacle lens, the amount of blue light entering the eye of the wearer of the spectacles provided with this spectacle lens is reduced and thus blue The burden on the eyes of the wearer due to light can be reduced. Furthermore, the above spectacle lens has a multilayer film including a metal layer with a film thickness of 1.0 to 10.0 nm. Metals have the property of absorbing not only light in the wavelength range of blue light, but also light in various wavelength ranges of the visible region such as green light and red light.
- Selectively reflecting and blocking blue light by the multilayer film reduces the yellowness by including a metal layer as a layer in the multilayer film, while the field of vision of the spectacle wearer becomes yellowish. Can.
- the metal layer is thick, there is a possibility that the transmissivity (for example, luminous transmittance) of the spectacle lens may be greatly reduced. It is possible to prevent the rate from being greatly reduced.
- the further aspect of this invention is related with the spectacles provided with the said spectacle lens.
- an eyeglass lens that can reduce the burden on the eye due to blue light and that is less yellowish, and an eyeglass provided with this eyeglass lens.
- the spectacle lens according to an aspect of the present invention has a lens base material containing a blue light absorbing compound and a multilayer film containing a metal layer with a film thickness of 1.0 to 10.0 nm, and has a blue light cut ratio of 21.
- Average reflectance in the wavelength range of 400 to 500 nm measured on the object side surface is 1.00% or less, and average reflectance in the wavelength range of 400 to 500 nm measured on the eye side surface Is 1.00% or less.
- the "object side surface” is the surface located on the object side when the glasses with the spectacle lens are worn by the wearer, and the "eye side surface” is the opposite, that is, the glasses with the spectacle lens Is a surface located on the eyeball side when worn by a wearer.
- the object-side surface is convex and the eye-side surface is concave. However, it is not limited to this aspect.
- the “blue light absorbing compound” refers to a compound having absorption in the wavelength range of 400 to 500 nm.
- ⁇ b is a weighted transmittance of blue light harmful to the eye defined in the standard of the Japan Medical Optical Equipment Industries Association, and is calculated by the following Formula 2.
- WB ( ⁇ ) is a weighting function, and is calculated by Equation 3 below.
- ⁇ ( ⁇ ) is the transmittance at wavelength ⁇ nm as measured by a spectrophotometer.
- Equation 3 E s ⁇ ( ⁇ ) is the spectral irradiance of sunlight, and B ( ⁇ ) is a blue light hazard function.
- E s ⁇ ( ⁇ ), B ( ⁇ ) and WB ( ⁇ ) are described in JIS T 7333 Annex C.
- the spectrophotometer makes measurements at least from 380 nm to 500 nm at a measurement wavelength interval (pitch) of 1 to 5 nm It shall be.
- the average reflectance in the wavelength range of 400 to 500 nm measured on the object-side surface of the spectacle lens is the average reflectance for light incident directly from the object side (that is, the incident angle is 0 °). It is the arithmetic mean of the reflectance measured at a wavelength range of 400-500 nm using a spectrophotometer at the side surface.
- the average reflectance in the wavelength range of 400 to 500 nm measured on the eyeball side surface of the spectacle lens is the average reflectance for light incident directly from the eyeball side, and a spectrophotometer is used on the eyeball side surface of the spectacle lens
- the measurement wavelength interval can be set arbitrarily. For example, it can be set in the range of 1 to 5 nm.
- the average reflectance in a wavelength range of 400 to 500 nm is also referred to as “blue light reflectance”.
- the “main wavelength” described later is an index that digitizes the wavelength of the color of light felt by human eyes, and is measured in accordance with Annex JA of JIS Z 8781-3: 2016.
- the “YI (Yellowness Index) value” described later is measured according to JIS K 7373: 2006.
- the YI value is a numerical value indicating the strength of yellowness. The higher the YI value, the stronger the yellowing.
- film thickness is a physical film thickness.
- the film thickness can be determined by a known film thickness measurement method.
- the film thickness can be determined by converting the optical film thickness measured by the optical film thickness measuring device into a physical film thickness.
- a multilayer film including a metal layer with a film thickness of 1.0 to 10.0 nm is also referred to as “metal layer-containing multilayer film”, and other multilayer films are also described as “other multilayer films”.
- the spectacle lens will be described in more detail below.
- the blue light cut ratio of the spectacle lens is 21.0% or more. According to an eyeglass lens having a blue light cut rate of 21.0% or more, the wearer wears the eyeglass provided with the eyeglass lens, thereby reducing the amount of blue light incident on the eye of the wearer, and the wearer It is possible to reduce the burden of blue light on your eyes.
- the blue light cut rate is preferably 21.5% or more, more preferably 22.0% or more, still more preferably 22.5% or more, and 23.0% or more. It is more preferable, 23.5% or more is further preferable, and 24.0% or more is even more preferable.
- the blue light cut rate can be, for example, 50.0% or less, 40.0% or less, or 30.0% or less.
- the higher the blue light cut rate, the better, and therefore the upper limit exemplified above may be exceeded.
- the above-mentioned spectacle lens does not need to increase the blue light reflectance on the surface of the spectacle lens by including the blue light absorbing compound in the lens substrate and having the multilayer film containing a metal layer.
- a blue light cut rate of 21.0% or more can be realized.
- the blue light reflectance measured on the object side surface of the spectacle lens and the blue light reflectance measured on the eyeball side surface are both 1.00% or less.
- the blue light reflectance measured on the object side surface of the spectacle lens is preferably less than 1.00%, more preferably 0.98% or less, and 0. It is more preferably 95% or less, still more preferably 0.90% or less, still more preferably 0.80% or less, and still more preferably 0.70% or less.
- the blue light reflectance measured on the eyeball side surface of the spectacle lens is preferably less than 1.00%, more preferably 0.98% or less, and 0. It is more preferably 95% or less, still more preferably 0.90% or less, still more preferably 0.80% or less, and still more preferably 0.70% or less.
- the blue light reflectance measured on the object side surface of the spectacle lens and the blue light reflectance measured on the eye side surface can both be, for example, 0.10% or more, but may be lower than this.
- the above spectacle lens has a blue light cut ratio of 21.0% or more although the blue light reflectance on both surfaces is 1.00% or less and the blue light reflectance on the surface of the spectacle lens is low. It can be contributed that the lens substrate contains a blue light absorbing compound and that the spectacle lens has a multilayer film (metal layer-containing multilayer film) including a metal layer as one layer in the multilayer film. . The details of the lens substrate and the multilayer film containing a metal layer will be described later.
- the lens substrate contained in the above-mentioned spectacle lens is not particularly limited as long as it contains a blue light absorbing compound.
- the lens substrate can be a plastic lens substrate or a glass lens substrate.
- the glass lens substrate can be, for example, a lens substrate made of inorganic glass.
- a plastic lens base material is preferable from the viewpoint of being lightweight, not easily broken, and easy to introduce a blue light absorbing compound.
- plastic lens substrates examples include styrene resins including (meth) acrylic resins, polycarbonate resins, allyl resins, allyl carbonate resins such as diethylene glycol bis allyl carbonate resin (CR-39), vinyl resins, polyester resins, polyether resins
- styrene resins including (meth) acrylic resins, polycarbonate resins, allyl resins, allyl carbonate resins such as diethylene glycol bis allyl carbonate resin (CR-39), vinyl resins, polyester resins, polyether resins
- a cured product (generally called a transparent resin) obtained by curing the curable composition contained therein can be mentioned.
- the curable composition can also be referred to as a polymerizable composition.
- a lens base material what is not dyed (colorless lens) may be used, and what is dyed (dye lens) may be used.
- the refractive index of the lens substrate can be, for example, about 1.60 to 1.75.
- the refractive index of the lens substrate is not limited to the above range, and may be vertically separated from the above range within the above range. In the present invention and the present specification, the refractive index refers to the refractive index for light with a wavelength of 500 nm.
- the lens substrate may be a lens having a refractive power (a so-called lens) or may be a lens having no refractive power (a so-called lens).
- the spectacle lens can be various lenses such as a monofocal lens, a multifocal lens, and a progressive power lens.
- the type of lens is determined by the surface shape of both sides of the lens substrate.
- the lens substrate surface may be any of a convex surface, a concave surface, and a flat surface.
- the object side surface is convex and the eye side surface is concave.
- the present invention is not limited to this.
- the lens substrate contains a blue light absorbing compound. This is one of the reasons why the spectacle lens can be provided with a blue light cut rate of 21.0% or more.
- blue light absorbing compounds include various compounds having absorption in the wavelength range of blue light, such as benzotriazole compounds, benzophenone compounds, triazine compounds and indole compounds, and preferred blue light absorbing compounds include benzotriazole compounds and An indole compound can be mentioned, and a benzotriazole compound can be mentioned as a more preferable blue light absorbing compound.
- the benzotriazole compound represented by following formula (1) is preferable.
- X represents a group that imparts a resonance effect.
- the substitution position of X is preferably at the 5-position of the triazole ring.
- Examples of X include chlorine atom, bromine atom, fluorine atom, iodine atom, sulfo group, carboxy group, nitrile group, alkoxy group, hydroxy group and amino group, and among them, chlorine atom, bromine atom, fluorine An atom is preferred, and a chlorine atom is more preferred.
- R 2 represents an alkyl group having 1 to 12 carbon atoms or an alkoxy group having 1 to 12 carbon atoms, and each of the alkyl group and the alkoxy group preferably has 1 to 8 carbon atoms, and 2 carbon atoms -8 is more preferable, and the carbon number is 4-8.
- the alkyl and alkoxy groups may be branched or linear. Among the alkyl group and the alkoxy group, an alkyl group is preferable.
- alkyl group examples include methyl, ethyl, n-propyl, iso-propyl, n-butyl, sec-butyl, tert-butyl, pentyl, hexyl, heptyl, n- Examples thereof include octyl group, 1,1,3,3-tetramethylbutyl group, nonyl group, decyl group, undecyl group, dodecyl group and the like, and among these, n-propyl group, iso-propyl group, n-butyl group , At least one selected from sec-butyl group, tert-butyl group, and 1,1,3,3-tetramethylbutyl group; n-butyl group, sec-butyl group, tert-butyl group, and 1 1,1,3,3-tetramethylbutyl is more preferable, and tert-butyl is more preferable.
- alkoxy group examples include methoxy, ethoxy, propoxy, butoxy, pentyloxy, hexyloxy, heptyloxy, octyloxy, nonyloxy, decyloxy, undecyloxy and dodecyloxy groups. Among these, butoxy or ethoxy is preferable.
- the substitution position of R 2 is preferably 3-, 4- or 5-position based on the substitution position of the benzotriazolyl group.
- R 1 represents an alkyl group having 1 to 3 carbon atoms or an alkoxy group having 1 to 3 carbon atoms, and as specific examples thereof, the carbon number among the above mentioned examples for R 2 is suitable The thing to do is mentioned. Among these, a methyl group or an ethyl group is preferable.
- m represents an integer of 0 or 1.
- the substitution position of R 2 is preferably 5-position based on the substitution position of the benzotriazolyl group.
- n represents the valence of R 3 and is 1 or 2.
- R 3 represents a hydrogen atom or a divalent hydrocarbon group having 1 to 8 carbon atoms.
- n represents 1, R 3 represents a hydrogen atom, and when n is 2, it represents a divalent hydrocarbon group having 1 to 8 carbon atoms.
- the hydrocarbon group represented by R 3 include aliphatic hydrocarbon group or an aromatic hydrocarbon group.
- the carbon number of the hydrocarbon group represented by R 3 is 1 to 8 carbon atoms, and preferably 1 to 3 carbon atoms.
- Examples of the divalent hydrocarbon group represented by R 3 include a methanediyl group, an ethanediyl group, a propanediyl group, a benzenediyl group, a toluenediyl group and the like. Among these, a methanediyl group is preferable.
- the substitution position of R 3 is preferably 3-position based on the substitution position of the benzotriazolyl group.
- R 3 is preferably a hydrogen atom, in which case n is 1.
- the benzotriazole compound is preferably a benzotriazole compound represented by the following formula (1-1).
- R 1 , R 2 and m are as defined above, and examples and preferred embodiments are also the same as described above.
- benzotriazole compound represented by Formula (1) methylene bis [3- (5-chloro-2-benzotriazolyl) -5- (1,1,3,3-tetramethylbutyl)- 2-hydroxyphenyl], methylenebis [3- (5-chloro-2-benzotriazolyl) -5- (tert-butyl) -2-hydroxyphenyl], methylenebis [3- (5-chloro-2-benzotria) Zoryl) -5-tert-butyl-2-hydroxyphenyl], methylenebis [3- (5-chloro-2-benzotriazolyl) -5-tert-butyl-2-hydroxyphenyl], methylenebis [3- ( 5-chloro-2-benzotriazolyl) -5-ethoxy-2-hydroxyphenyl], phenylenebis [3- (5-chloro-2-benzotriazolyl) 5- (1,1,3,3-tetramethylbutyl) -2-hydroxyphenyl], phenylenebis
- the above lens substrate contains, for example, 0.05 to 3.00 parts by mass of a blue light absorbing compound with respect to 100 parts by mass of a resin (or a polymerizable compound for obtaining the resin) constituting the lens substrate. It is preferably contained in an amount of 0.05 to 2.50 parts by mass, more preferably 0.10 to 2.00 parts by mass, and still more preferably 0.30 to 2.00 parts by mass. However, as long as the blue light cut rate of the spectacle lens can be 21.0% or more, the content is not limited to the above range.
- a publicly known method can be used as a manufacturing method of a lens base material containing a blue light absorptive compound.
- a lens substrate comprising a blue light absorbing compound by adding a blue light absorbing compound to the curable composition
- the blue light absorbing dye can be introduced into the lens substrate by various wet or dry methods generally used as a method for dyeing a lens substrate.
- a dip method immersion method
- a sublimation dyeing method can be mentioned as an example of a dry method.
- the above-mentioned lens base material may contain various additives which may be generally contained in the lens base material of the spectacle lens.
- a curable composition containing a polymerizable compound and a blue light absorbing compound such a curable composition may be prepared, for example, by Polymerization catalysts described in JP-A-104101, JP-A-9-208621, JP-A-9-252581 and the like, JP-A-1-163012 and JP-A-3-281312 etc.
- One or more additives such as an internal mold release agent, an antioxidant, a fluorescent whitening agent, and a bluing agent may be added.
- Known techniques can be applied to the types and addition amounts of these additives, and a method of molding a lens substrate using the curable composition.
- the above spectacle lens has a multilayer film including a metal layer with a film thickness of 1.0 to 10.0 nm.
- the metal layer-containing multilayer film can be located on the object side surface of the spectacle lens, can be located on the eye side surface, or can be located on both surfaces.
- the metal layer-containing multilayer film can be located on one of the eyeball side surface and the object side surface of the spectacle lens, and the other multilayer film can be located on the other surface.
- the metallized multilayer film is located on one of the eyeball side surface and the object side surface of the spectacle lens, and neither the metallized multilayer film nor the other multilayer is located on the other surface. It is also possible.
- the metal layer-containing multilayer film is an eyeglass from the viewpoint of the ease of controlling the principal wavelength measured on both surfaces of the eyeglass lens described later to be in the range of 500.0 to 550.0 nm. It is preferably located on at least the object side surface of the lens, and more preferably located only on the object side surface. Both the metallized multilayer film and the other multilayer film may be located directly on the surface of the lens substrate, or indirectly on the surface of the lens substrate via one or more other layers. It is also good. Examples of the layer that can be formed between the lens substrate and the multilayer film include, for example, a polarizing layer, a light control layer, a hard coat layer, and the like.
- the hard coat layer can be, for example, a cured layer obtained by curing the curable composition.
- a primer layer for improving adhesion may be formed between the lens substrate and the multilayer film.
- paragraphs 0029 to 0030 of JP 2012-128135 A can be referred to.
- the “metal layer” is a component selected from the group consisting of a single metal element (pure metal), an alloy of a plurality of metal elements, and a compound of one or more metal elements (in the following Metal component (also described as “metal component”) means a film formed by deposition according to any film forming method, and impurities which are inevitably mixed in during film formation and known to be optionally used for supporting film formation Except for the additive, it is a film composed of a metal component.
- the metal layer may be a film in which the metal component occupies 90 to 100% by mass with respect to the mass of the film, and may be a film in which the metal component occupies 95 to 100% by mass.
- metal elements include transition elements such as chromium group elements (eg, Cr, Mo, W), iron group elements (eg, Fe, Co, Ni), noble metal elements (eg, Cu, Ag, Au), etc. .
- a chromium layer, a nickel layer, and a silver layer can be mentioned, for example.
- the metal component contained in the chromium layer can be chromium alone (i.e., metal Cr), chromium oxide, and a mixture thereof.
- the metal component contained in the nickel layer can be nickel alone (i.e., metal Ni), nickel oxide, and a mixture thereof.
- the metal component contained in the silver layer can be a simple substance of silver (ie, metal Ag), an oxide of silver, and a mixture thereof.
- the metal component contained in the metal layer is more preferably a single element of a metal element.
- a known film forming method can be used as a film forming method of the multilayer film containing a metal layer.
- film formation is preferably performed by vapor deposition. That is, the metal layer is preferably a vapor deposited film of a metal component.
- a vapor deposition film means the film formed into a film by vapor deposition.
- the "vapor deposition" in the present invention and the present specification includes a dry method, for example, a vacuum deposition method, an ion plating method, a sputtering method and the like. In the vacuum deposition method, an ion beam assisted method may be used in which an ion beam is simultaneously irradiated during deposition. The above points are the same for film formation of the following high refractive index layer and low refractive index layer.
- the metal layer contained in the metal layer-containing multilayer film has a thickness of 1.0 to 10.0 nm.
- a metal layer with a film thickness of 1.0 to 10.0 nm is also simply referred to as a metal layer.
- the thickness of the metal layer is preferably 9.0 nm or less, more preferably 8.0 nm or less, and 7.0 nm or less from the viewpoint of transmittance of the spectacle lens (for example, luminous transmittance) Is more preferably 6.0 nm or less, still more preferably 5.0 nm or less, still more preferably 4.0 nm or less, still more preferably 3.0 nm or less More preferred.
- the film thickness of the metal layer is 1.0 nm or more, preferably 1.1 nm or more, from the viewpoint of the absorption efficiency of light of various wavelengths such as blue light by the metal layer.
- the metal layer-containing multilayer film preferably contains only one metal layer having a thickness of 1.0 to 10.0 nm, but in one aspect, such a metal layer is divided into two or more layers and divided. There may be other layers in between. In this case, the total film thickness of the metal layer divided into two or more layers is 1.0 to 10.0 nm.
- the multilayer film containing a metal layer is preferably a multilayer film including a metal layer in a multilayer film in which high refractive index layers and low refractive index layers are alternately stacked.
- high refractive index layer means a layer having a higher refractive index than the low refractive index layer contained in the same multilayer film.
- the low refractive index layer refers to a layer having a refractive index lower than that of the high refractive index layer contained in the same multilayer film.
- the refractive index of the high refractive index material constituting the high refractive index layer is, for example, 1.60 or more (for example, the range of 1.60 to 2.40), and the refractive index of the low refractive index material constituting the low refractive index layer Can be, for example, 1.59 or less (for example, in the range of 1.37 to 1.59).
- the refractive index of high refractive index material and low refractive index material is limited to the above range. It is not a thing.
- the metal layer-containing multilayer film is preferably an inorganic multilayer film.
- zirconium oxide for example, ZrO 2
- tantalum oxide Ta 2 O 5
- titanium oxide for example, TiO 2
- aluminum A kind of oxide selected from the group consisting of oxide (Al 2 O 3 ), yttrium oxide (eg Y 2 O 3 ), hafnium oxide (eg HfO 2 ), and niobium oxide (eg Nb 2 O 5 ) Or a mixture of two or more can be mentioned.
- a low refractive index material for forming the low refractive index layer it is selected from the group consisting of silicon oxide (for example SiO 2 ), magnesium fluoride (for example MgF 2 ) and barium fluoride (for example BaF 2 ) Mention may be made of one or more mixtures of oxides or fluorides.
- oxides and fluorides are represented by the stoichiometric composition, but from the stoichiometric composition, oxygen or fluorine in a deficient or excessive state is also a high refractive index material or a low refractive index It can be used as a material.
- the high refractive index layer is a film containing a high refractive index material as a main component
- the low refractive index layer is a film containing a low refractive index material as a main component.
- the main component is the component that occupies the most in the film, and is usually the component that occupies about 50 mass% to 100 mass%, and further about 90 mass% to 100 mass% with respect to the mass of the film .
- a film for example, a vapor deposition film
- a film formation material for example, a vapor deposition source
- the main components of the film forming material are also the same as above.
- the film and the film forming material may contain impurities which are inevitably mixed in, and also have a role to support other components such as other inorganic substances and film formation within the range that the function of the main component is not impaired. It may contain known additive ingredients to be carried out.
- the film formation can be performed by a known film formation method, and in terms of ease of film formation, deposition is preferably performed.
- the metal layer-containing multilayer film can be, for example, a multilayer film in which a high refractive index layer and a low refractive index layer are alternately laminated in a total of 3 to 10 layers.
- the film thickness of the high refractive index layer and the film thickness of the low refractive index layer can be determined according to the layer configuration. Specifically, the combination of layers included in the multilayer film, and the film thickness of each layer are obtained by providing the refractive index of the film forming material for forming the high refractive index layer and the low refractive index layer, and providing the multilayer film It can be determined by optical simulation according to known methods, based on the desired reflection and transmission characteristics to be provided.
- the notation “/” is described in the case where the layer described on the left of “/” and the layer described on the right are adjacent, and on the left of “/” It is used in the meaning including the case where the conductive oxide layer mentioned later exists between the layer currently described and the layer described on the right.
- a film containing silicon oxide as a main component (low refractive index layer) and a film containing zirconium oxide as a main component A combination with (a high refractive index layer) can be mentioned.
- a combination of a film containing silicon oxide as a main component (low refractive index layer) and a film containing niobium oxide as a main component (high refractive index layer) can also be mentioned.
- a multilayer film including at least one laminated structure in which two films in the above combination are adjacent to each other can be exemplified as a preferable example of the multilayer film with a metal layer.
- the metal layer-containing multilayer film is a layer containing a conductive oxide as a main component (conductive oxide layer), preferably a conductive oxide. It is also possible to include one or more layers of the conductive oxide vapor deposition film formed by vapor deposition using a vapor deposition source containing as a main component at any position of the multilayer film. The same is true for the other multilayer films. Note that the same applies to the main components described for the conductive oxide layer.
- an indium tin oxide (tin-doped indium oxide; ITO) layer having a film thickness of 10.0 nm or less, a tin oxide layer having a film thickness of 10.0 nm or less, from the viewpoint of transparency of the spectacle lens And the titanium oxide layer with a film thickness of 10.0 nm or less is preferable.
- the indium tin oxide (ITO) layer is a layer containing ITO as a main component. The same applies to the tin oxide layer and the titanium oxide layer.
- the multilayer film including metal layer and the other multilayer film can prevent the spectacle lens from being charged and the dust and dirt to adhere by including the conductive oxide layer.
- metal layer”, “high refractive index layer” and “low refractive index layer” included in the metal layer-containing multilayer film and other multilayer films have a film thickness of 10.0 nm or less
- An indium tin oxide (ITO) layer, a tin oxide layer with a film thickness of 10.0 nm or less, and a titanium oxide layer with a film thickness of 10.0 nm or less are not considered. That is, even if one or more layers of these layers are included in the metal layer-containing multilayer film or other multilayer films, these layers are “metal layer”, “high refractive index layer” or “low refractive index layer” I shall not look at it.
- the film thickness of the conductive oxide layer having a film thickness of 10.0 nm or less can be, for example, 0.1 nm or more.
- the other multilayer film is a spectacle lens
- a multilayer film usually provided as an antireflective film.
- the antireflective film include multilayer films that exhibit an antireflective effect on visible light (light in the wavelength range of 380 to 780 nm). The construction of such multilayer films is known.
- the other multilayer film can be, for example, an inorganic multilayer film.
- another multilayer film may be a multilayer film in which a high refractive index layer and a low refractive index layer are alternately laminated in a total of 3 to 10 layers. Details of the high refractive index layer and the low refractive index layer are as described above. Further, as a preferable example of the combination of the low refractive index layer and the high refractive index layer contained in another multilayer film, a film containing silicon oxide as a main component (low refractive index layer) and zirconium oxide as a main component A combination with a film (high refractive index layer) can be mentioned.
- a combination of a film containing silicon oxide as a main component (low refractive index layer) and a film containing niobium oxide as a main component (high refractive index layer) can also be mentioned.
- a multilayer film including at least one laminated structure in which two films in the above combination are adjacent to each other can be exemplified as a preferred example of another multilayer film. Also,
- additional functional films can also be formed on the metallized multilayer film and / or other multilayer films.
- a functional film various functional films such as a water repellent or hydrophilic antifouling film, an antifogging film and the like can be mentioned.
- Known techniques can be applied to any of these functional films.
- the above-mentioned spectacle lens can be a spectacle lens excellent in transparency which has high luminous transmittance in one mode.
- the luminous transmittance of the spectacle lens is, for example, 35.0% or more, preferably 40.0% or more, more preferably 45.0% or more, and 50.0% or more. Is more preferably 55.0% or more, still more preferably 60.0% or more, still more preferably 65.0% or more, and still more preferably 70.0% or more. Is still more preferably 75.0% or more, still more preferably 80.0% or more, still more preferably 85.0% or more.
- the luminous transmittance of the above-mentioned spectacle lens is 95.0% or less, for example, and can also be 90.0% or less.
- the luminous reflectance measured on the object side surface of the spectacle lens be low. Further, from the viewpoint of improving the wearing feeling of the spectacle lens, it is preferable that the luminous reflectance measured on the eyeball side surface of the spectacle lens be low. From the viewpoint of improving the appearance quality, the luminous reflectance measured on the object side surface of the spectacle lens is preferably 1.80% or less, more preferably 1.50% or less, and 1.30%. It is more preferable that On the other hand, from the viewpoint of improving the feeling of wearing, the luminous reflectance measured on the eyeball side surface of the spectacle lens is preferably 1.80% or less, more preferably 1.50% or less, and 1. More preferably, it is 30% or less.
- the luminous reflectance measured on the object side surface of the spectacle lens and the luminous reflectance measured on the eye surface are, for example, 0.10% or more, 0.20% or more, 0.30% or more, and 0, respectively.
- the lower limit may be .40% or more, or 0.50% or more, but the above lower limit is an exemplification and is not limited thereto.
- the luminous reflectance can be realized by the film design of the metal layer-containing multilayer film or other multilayer film provided on the object side surface and / or the eyeball side surface of the lens substrate. Film design can be performed by optical simulation according to known methods.
- the above spectacle lens exhibits a blue light cut rate of 21.0% or more, so that the amount of blue light entering the eye of the spectacles wearer can be reduced. However, since the blue light reflectance measured on both surfaces of the spectacle lens is 1.00% or less, the blue light is selectively reflected to suppress yellowish vision of the spectacle wearer. be able to.
- the spectacle lens can exhibit a YI value of 10.0% or less.
- the YI value is more preferably 9.0% or less, still more preferably 8.0% or less, and still more preferably 7.0% or less.
- the YI value can be, for example, 2.0% or more or 3.0% or more, but the lower the YI value is, the more preferable it is to reduce yellowing, and therefore the lower limit exemplified above may be exceeded.
- the general anti-reflection film is designed to exhibit a green interference color that makes it difficult for the human eye to feel discomfort.
- the dominant wavelength measured on the surface on the side having the anti-reflection film is usually the wavelength range of green light.
- a multilayer film having the property of selectively reflecting blue light is provided on the surface of the spectacle lens substrate It has been proposed.
- the spectacle lens provided with such a multilayer film strongly reflects blue light on the surface on the side having the multilayer film, the dominant wavelength measured on this surface is usually shorter than the wavelength range of green light It is in the wavelength range of blue light on the wavelength side.
- Such an eyeglass lens has a blue interference color confirmed by observing the eyeglass lens, and thus the appearance is different from that of a normal eyeglass lens having an anti-reflection film exhibiting a green interference color. With regard to this difference in appearance, in recent years, there is a need for an eyeglass lens having an appearance similar to that of a normal eyeglass lens although measures for blue light have been taken.
- the spectacle lens according to one aspect of the present invention has a high blue light cut rate, but the blue light reflectance measured on both surfaces of the spectacle lens is as low as 1.00% or less. , And can have a dominant wavelength in the green wavelength range.
- at least one of the principal wavelength measured on the object-side surface of the spectacle lens and the principal wavelength measured on the eye-eye surface of the spectacle lens is in the range of 500.0 to 550.0 nm.
- 500.0 to 550.0 nm is a wavelength range of green light
- an eyeglass lens having a main wavelength in the wavelength range of 500.0 to 550.0 nm on at least one surface is observed from the surface side, Similar to a normal spectacle lens, it can exhibit a green interference color.
- the appearance color of the spectacle lens recognized by a third person facing the wearer wearing the spectacles is largely affected by the interference color on the object side, so at least the main wavelength measured on the object side surface is 500.0 to 550 It is preferable that the thickness be in the range of 0 nm. Further, from the viewpoint of the appearance quality of the spectacle lens, it is preferable that the interference colors observed on both surfaces of the spectacle lens be similar colors. Therefore, it is more preferable that the dominant wavelength measured on both surfaces of the spectacle lens be in the range of 500.0 to 550.0 nm. In one aspect, the dominant wavelength measured on each surface of the spectacle lens can be, for example, 510.0 nm or more.
- the dominant wavelength measured on each surface of the spectacle lens may be, for example, 540.0 nm or less.
- the contrast between the case where the metal layer is located closer to the lens substrate and the case where the metal layer is located farther from the lens substrate compares the dominant wavelength when the metal layer is located closer to the lens substrate. It tends to be on the long wavelength side.
- a further aspect of the invention relates to an eyeglass comprising the eyeglass lens according to the aspect of the invention described above.
- the details of the spectacle lens included in this spectacle are as described above.
- the said spectacle lens can reduce the burden by the blue light to the eyes of a spectacles wearer by providing this spectacle lens.
- the spectacle lens provided in the above-mentioned glasses it is possible to prevent the field of view of the spectacle wearer from being yellowish.
- frame A well-known technique is applicable.
- Example 1 (1) Preparation of lens base (lens base A) containing blue light absorbing compound 100.00 parts by mass of bis- ( ⁇ -epithiopropyl) sulfide, 2- (3-tert) which is a blue light absorbing compound After stirring and mixing 0.40 parts by mass of butyl-2-hydroxy-5-methylphenyl) -5-chloro-2H-benzotriazole, 0.05 parts by mass of tetra-n-butylphosphonium bromide is added as a catalyst. The mixture was stirred and mixed for 3 minutes under a reduced pressure of 10 mmHg to prepare a lens monomer composition (curable composition).
- the lens monomer composition is poured into a lens molding mold (0.00 D, set to a thickness of 2.0 mm) composed of a glass mold and a resin gasket prepared in advance, and the temperature in the furnace is set.
- the polymerization was carried out in an electric furnace at 20 ° C. to 100 ° C. for 20 hours. After completion of polymerization, the gasket and the mold were removed, and then heat treatment was performed at 110 ° C. for 1 hour to obtain a plastic lens (lens base A).
- the obtained lens substrate A had a convex surface on the object side, a concave surface on the eye side, and a refractive index of 1.60.
- the spectacle lens of Example 1 having the multilayer film containing the metal layer (chromium (Cr metal) layer) on the object side and the other multilayer film (not including the metal layer) on the eyeball side was obtained.
- the multilayer deposited film is laminated in the order of one layer, two layers... From the lens substrate side (hard coat layer side) toward the surface side of the spectacle lens The outermost layer on the surface side of the spectacle lens was formed to be the layer described in the lowermost column in Table 1.
- film deposition was performed using a deposition source (film forming material) made of an oxide or chromium (metal Cr) shown in Table 1 . Therefore, the metal layer formed here is a chromium layer (metal Cr layer).
- the refractive index of each oxide and the film thickness of each layer are shown in Table 1.
- Example 2 After both surfaces of the lens substrate A were optically processed (polished) to form an optical surface, hard coat layers (hardened layers obtained by curing the curable composition) having a film thickness of 3000 nm were formed on both surfaces.
- Table 2 (Table 2-1, Table 2-2) by ion assisted deposition using oxygen gas and nitrogen gas as assist gas on the surface of the hard coat layer on the object side and on the surface of the hard coat layer on the eyeball side
- the multilayer vapor deposition film of the structure shown to was formed into a film.
- a spectacle lens of Example 2 having a multilayer film containing a metal layer (chromium (Cr metal) layer) on the object side and another multilayer film (not including a metal layer) on the eyeball side was obtained.
- Example 3 After both surfaces of the lens substrate A were optically processed (polished) to form an optical surface, hard coat layers (hardened layers obtained by curing the curable composition) having a film thickness of 3000 nm were formed on both surfaces.
- Table 3 Table 3-1, Table 3-2) by ion assisted deposition using oxygen gas and nitrogen gas as assist gas on the hard coat layer surface on the object side and the hard coat layer surface on the eyeball side, respectively
- the multilayer vapor deposition film of the structure shown to was formed into a film.
- a spectacle lens of Example 3 having a multilayer film containing a metal layer (chromium (Cr metal) layer) on the object side and another multilayer film (not including a metal layer) on the eyeball side was obtained.
- Example 4 After both surfaces of the lens substrate A were optically processed (polished) to form an optical surface, hard coat layers (hardened layers obtained by curing the curable composition) having a film thickness of 3000 nm were formed on both surfaces.
- Table 4 (Table 4-1, Table 4-2) by ion assisted deposition using oxygen gas and nitrogen gas as assist gas on the hard coat layer surface on the object side and on the hard coat layer surface on the eyeball side, respectively
- the multilayer vapor deposition film of the structure shown to was formed into a film.
- a spectacle lens of Example 4 having a multilayer film containing a metal layer (nickel (metal Ni) layer) on the object side and another multilayer film (not including a metal layer) on the eyeball side was obtained.
- Example 5 After both surfaces of the lens substrate A were optically processed (polished) to form an optical surface, hard coat layers (hardened layers obtained by curing the curable composition) having a film thickness of 3000 nm were formed on both surfaces.
- Table 5 Table 5-1, Table 5-2) by ion assisted deposition using oxygen gas and nitrogen gas as assist gas on the hard coat layer surface on the object side and the hard coat layer surface on the eyeball side, respectively.
- the multilayer vapor deposition film of the structure shown to was formed into a film.
- a spectacle lens of Example 5 having a multilayer film containing a metal layer (chromium (Cr metal) layer) on the object side and another multilayer film (not including a metal layer) on the eyeball side was obtained.
- Example 6 After both surfaces of the lens substrate A were optically processed (polished) to form an optical surface, hard coat layers (hardened layers obtained by curing the curable composition) having a film thickness of 3000 nm were formed on both surfaces.
- Table 6 Table 6-1, Table 6-2) by ion assisted deposition using oxygen gas and nitrogen gas as assist gas on the hard coat layer surface on the object side and the hard coat layer surface on the eyeball side, respectively.
- the multilayer vapor deposition film of the structure shown to was formed into a film.
- a spectacle lens of Example 6 having a multilayer film containing a metal layer (chromium (Cr metal) layer) on the object side and another multilayer film (not including a metal layer) on the eyeball side was obtained.
- Comparative Example 1 After both surfaces of the lens substrate A were optically processed (polished) to form an optical surface, hard coat layers (hardened layers obtained by curing the curable composition) having a film thickness of 3000 nm were formed on both surfaces. Ion vapor deposition was performed on the surface of the object side hard coat layer and the eyeball side hard coat layer using oxygen gas and nitrogen gas as an assist gas, respectively, to form a multilayer vapor deposition film having the configuration shown in Table 8 . Thus, the spectacle lens of Comparative Example 1 having the other multilayer film (without the metal layer) on the object side and the eyeball side was obtained.
- Comparative Example 2 After both surfaces of the lens substrate A were optically processed (polished) to form an optical surface, hard coat layers (hardened layers obtained by curing the curable composition) having a film thickness of 3000 nm were formed on both surfaces. Ion vapor deposition was performed on the surface of the hard coat layer on the object side and on the surface of the eyeball side of the hard coat layer using oxygen gas and nitrogen gas as the assist gas, respectively, to form a multilayer vapor deposition film having the configuration shown in Table 9 . Thus, a spectacle lens of Comparative Example 2 having another multilayer film (without the metal layer) on the object side and the eyeball side was obtained.
- the film thicknesses described in Tables 1 to 9 are values (unit: nm) obtained by converting the optical film thickness measured by the optical film thickness measuring device into a physical film thickness. The thickness of each layer was controlled by the film formation time.
- Blue light reflectance and luminous reflectance measured on the object side surface and the eye side surface of the spectacle lens> The normal incidence reflection spectral characteristics at the optical center of the object side surface (convex side) were measured from the object side of each spectacle lens of the example and the comparative example. Using the measurement results, the average reflectance (blue light reflectance) and the luminous reflectance on the object side surface in the wavelength range of 400 to 500 nm were determined by the method described above. Further, from the eyeball side of each spectacle lens of the example and the comparative example, the normal incidence reflection spectral characteristic at the optical center of the eyeball side surface (concave side) was measured.
- the average reflectance (blue light reflectance) and the luminous reflectance on the eyeball side surface in the wavelength range of 400 to 500 nm were determined by the method described above.
- the measurement was performed using a lens reflectance measurement device USPM-RU manufactured by Olympus (measurement pitch: 1 nm).
- the reflection spectrum obtained for the spectacle lens of Example 1 is shown in FIG. 1, and the reflection spectrum obtained for the spectacle lens of Example 2 is shown in FIG.
- the measurement results of the normal incidence transmission spectral characteristics obtained in the above were used to determine the YI value according to JIS K 7373: 2006.
- X, Y, Z are calculated according to the equation (3) of JIS Z 8701: 1999 from the transmission spectrum obtained by the measurement of normal incidence transmission spectral characteristics, and the one of JIS K 7373: 2006 6.
- the YI value for the D65 light source was calculated according to the formula of Section 1.
- the spectacle lens of Comparative Example 1 has a blue light reflectance measured at both surfaces of the spectacle lens exceeding 1.00%.
- the eyeglass lens of Comparative Example 1 exhibits a high blue light reflectance on both surfaces, and thus exhibits a high blue light cut ratio as compared to the eyeglass lens of Comparative Example 2, but the YI value is less than that of Example 1 Higher than 6 eyeglass lenses. Therefore, when the glasses provided with the spectacle lens of Comparative Example 1 are worn, the field of vision of the wearer will be yellowish as compared with the case where the glasses provided with the spectacle lenses of Examples 1 to 6 are worn.
- the spectacle lenses of Examples 1 to 6 show a high blue light cut ratio of 21.0% or more, and the YI value compared with the spectacle lens of Comparative Example 1 And the yellowness visually recognized by the spectacle wearer is reduced.
- it has a lens base material containing a blue light absorbing compound and a multilayer film containing a metal layer with a film thickness of 1.0 to 10.0 nm, and the blue light cut ratio is 21.0% or more.
- the average reflectance in the wavelength range of 400 to 500 nm measured on the object side surface is 1.00% or less, and the average reflectance in the wavelength range of 400 to 500 nm measured on the eye side surface is 1.00%
- An eyeglass lens is provided which is:
- the spectacle lens can reduce the burden on the eye due to blue light, and can reduce yellowishness.
- the dominant wavelength measured at the object side surface of the spectacle lens is in the range of 500.0 to 550.0 nm.
- the dominant wavelength measured on the ocular surface of the spectacle lens is in the range of 500.0 to 550.0 nm.
- the dominant wavelength measured on the object side surface of the spectacle lens and the dominant wavelength measured on the eye side surface are both in the range of 500.0 to 550.0 nm.
- a multilayer film is located on the object side surface and the eyeball side surface of the lens substrate, and the multilayer film including the metal layer is a multilayer film located on the object side surface of the lens substrate It is a membrane.
- the metal layer is a chromium layer.
- the metal layer is a nickel layer.
- the luminous transmittance of the spectacle lens is 80.0% or more.
- the YI value of the spectacle lens is 10.0% or less.
- an eyeglass provided with the above-described eyeglass lens is provided.
- the present invention is useful in the field of manufacturing spectacle lenses and spectacles.
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Health & Medical Sciences (AREA)
- Ophthalmology & Optometry (AREA)
- General Health & Medical Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Inorganic Chemistry (AREA)
- Spectroscopy & Molecular Physics (AREA)
- Eyeglasses (AREA)
- Optical Filters (AREA)
Abstract
Description
しかるに、レンズ基材の表面上に青色光を選択的に反射する性質を有する多層膜を設けると、眼鏡レンズを介して眼鏡装用者の眼に入射する青色光の光量は低減できるものの、眼鏡装用者の視界が黄色み(以下、単に「黄色み」とも記載する。)を帯びる傾向がある。これは、可視領域の様々な波長の光の中で青色光が選択的に遮断されることにより、相対的に緑色光と赤色光の割合が高くなる結果、赤色と緑色の混色の黄色みが視認されやすくなるためである。
青色光吸収性化合物を含むレンズ基材と、
膜厚1.0~10.0nmの金属層を含む多層膜と、
を有し、
青色光カット率が21.0%以上であり、
物体側表面において測定される400~500nmの波長域における平均反射率が1.00%以下であり、かつ
眼球側表面において測定される400~500nmの波長域における平均反射率が1.00%以下である、眼鏡レンズ、
に関する。
更に上記眼鏡レンズは、膜厚1.0~10.0nmの金属層を含む多層膜を有する。金属は、青色光の波長域の光のみならず緑色光や赤色光等の可視領域の様々な波長域の光を吸収する性質を有する。多層膜によって青色光を選択的に反射させて遮断すると眼鏡装用者の視界が黄色みを帯びてしまうのに対し、多層膜の中の一層として金属層を含めることにより、黄色みを低減することができる。
また、金属層を厚膜にすると眼鏡レンズの透過率(例えば視感透過率)を大きく低下させるおそれがあるが、膜厚1.0~10.0nmの金属層であれば、眼鏡レンズの透過率が大きく低下することを防ぐことができる。
本発明の一態様にかかる眼鏡レンズは、青色光吸収性化合物を含むレンズ基材と膜厚1.0~10.0nmの金属層を含む多層膜とを有し、青色光カット率が21.0%以上であり、物体側表面において測定される400~500nmの波長域における平均反射率が1.00%以下であり、かつ眼球側表面において測定される400~500nmの波長域における平均反射率が1.00%以下である眼鏡レンズである。
(式1)
青色光カット率Cb=1-τb
上記眼鏡レンズの青色光カット率は、21.0%以上である。青色光カット率が21.0%以上の眼鏡レンズによれば、この眼鏡レンズを備えた眼鏡を装用者が装用することにより、装用者の眼に入射する青色光の光量を低減し、装用者の眼への青色光による負担を軽減することができる。青色光カット率は、21.5%以上であることが好ましく、22.0%以上であることがより好ましく、22.5%以上であることが更に好ましく、23.0%以上であることが一層好ましく、23.5%以上であることがより一層好ましく、24.0%以上であることが更により一層好ましい。また、青色光カット率は、例えば50.0%以下、40.0%以下または30.0%以下であることができる。ただし、装用者の眼に入射する青色光の光量を低減する観点からは青色光カット率は高いほど好ましいため、上記に例示された上限を超えてもよい。
先に記載したように、レンズ基材の表面上に青色光を選択的に反射する性質を有する多層膜を設けると、眼鏡装用者の視界が黄色みを帯びてしまう。これに対し、上記眼鏡レンズは、レンズ基材に青色光吸収性化合物を含むこと、および金属層入り多層膜を有することにより、眼鏡レンズ表面における青色光反射率を高くすることを要さずに21.0%以上の青色光カット率を実現することができる。上記眼鏡レンズは、眼鏡レンズの物体側表面において測定される青色光反射率および眼球側表面において測定される青色光反射率が、いずれも1.00%以下である。黄色みをより低減する観点から、眼鏡レンズの物体側表面において測定される青色光反射率は、1.00%未満であることが好ましく、0.98%以下であることがより好ましく、0.95%以下であることが更に好ましく、0.90%以下であることが一層好ましく、0.80%以下であることがより一層好ましく、0.70%以下であることが更により一層好ましい。また、上記と同様の観点から、眼鏡レンズの眼球側表面において測定される青色光反射率は、1.00%未満であることが好ましく、0.98%以下であることがより好ましく、0.95%以下であることが更に好ましく、0.90%以下であることが一層好ましく、0.80%以下であることがより一層好ましく、0.70%以下であることが更により一層好ましい。眼鏡レンズの物体側表面において測定される青色光反射率および眼球側表面において測定される青色光反射率はいずれも、例えば0.10%以上であることができるが、これを下回ってもよい。
上記眼鏡レンズに含まれるレンズ基材は、青色光吸収性化合物を含むものである限り、特に限定されない。レンズ基材は、プラスチックレンズ基材またはガラスレンズ基材であることができる。ガラスレンズ基材は、例えば無機ガラス製のレンズ基材であることができる。レンズ基材としては、軽量で割れ難く、かつ青色光吸収性化合物の導入が容易であるという観点から、プラスチックレンズ基材が好ましい。プラスチックレンズ基材としては、(メタ)アクリル樹脂をはじめとするスチレン樹脂、ポリカーボネート樹脂、アリル樹脂、ジエチレングリコールビスアリルカーボネート樹脂(CR-39)等のアリルカーボネート樹脂、ビニル樹脂、ポリエステル樹脂、ポリエーテル樹脂、イソシアネート化合物とジエチレングリコールなどのヒドロキシ化合物との反応で得られたウレタン樹脂、イソシアネート化合物とポリチオール化合物とを反応させたチオウレタン樹脂、分子内に1つ以上のジスルフィド結合を有する(チオ)エポキシ化合物を含有する硬化性組成物を硬化した硬化物(一般に透明樹脂と呼ばれる。)を挙げることができる。硬化性組成物は、重合性組成物ともいうことができる。なおレンズ基材としては、染色されていないもの(無色レンズ)を用いてもよく、染色されているもの(染色レンズ)を用いてもよい。レンズ基材の屈折率は、例えば、1.60~1.75程度であることができる。ただしレンズ基材の屈折率は、上記範囲に限定されるものではなく、上記の範囲内でも、上記の範囲から上下に離れていてもよい。本発明および本明細書において、屈折率とは、波長500nmの光に対する屈折率をいうものとする。また、レンズ基材は、屈折力を有するレンズ(いわゆる度付レンズ)であってもよく、屈折力なしのレンズ(いわゆる度なしレンズ)であってもよい。
上記レンズ基材は、青色光吸収性化合物を含む。このことが、上記眼鏡レンズに21.0%以上の青色光カット率をもたらすことができる理由の1つである。青色光吸収性化合物は、ベンゾトリアゾール化合物、ベンゾフェノン化合物、トリアジン化合物、インドール化合物等の青色光の波長域に吸収を有する各種化合物を挙げることができ、好ましい青色光吸収性化合物としてはベンゾトリアゾール化合物およびインドール化合物を挙げることができ、より好ましい青色光吸収性化合物としてはベンゾトリアゾール化合物を挙げることができる。ベンゾトリアゾール化合物としては、下記式(1)で表されるベンゾトリアゾール化合物が好ましい。
Xの例としては、塩素原子、臭素原子、フッ素原子、ヨウ素原子、スルホ基、カルボキシ基、ニトリル基、アルコキシ基、ヒドロキシ基、アミノ基が挙げられ、これらの中でも、塩素原子、臭素原子、フッ素原子が好ましく、塩素原子がより好ましい。
アルキル基およびアルコキシ基は、分岐であっても直鎖であってもよい。アルキル基およびアルコキシ基の中でも、アルキル基が好ましい。
式(1)において、R2の置換位置は、ベンゾトリアゾリル基の置換位置を基準として、3位,4位または5位が好ましい。
R3で表される2価の炭化水素基の例としては、メタンジイル基、エタンジイル基、プロパンジイル基、ベンゼンジイル基、トルエンジイル基等が挙げられ、これらの中でもメタンジイル基が好ましい。
(金属層入り多層膜)
上記眼鏡レンズは、膜厚1.0~10.0nmの金属層を含む多層膜を有する。
金属層入り多層膜は、眼鏡レンズの物体側表面上に位置することができ、眼球側表面上に位置することもでき、両表面上に位置することもできる。また、一態様では、眼鏡レンズの眼球側表面および物体側表面の一方の表面上に金属層入り多層膜が位置し、他方の表面上に他の多層膜が位置することができる。他の一態様では、眼鏡レンズの眼球側表面および物体側表面の一方の表面上に金属層入り多層膜が位置し、他方の表面上には金属層入り多層膜も他の多層膜も位置しないこともあり得る。一態様では、後述する眼鏡レンズの両表面において測定される主波長をいずれも500.0~550.0nmの範囲内に制御することの容易性の観点からは、金属層入り多層膜は、眼鏡レンズの少なくとも物体側表面上に位置することが好ましく、物体側表面上のみに位置することがより好ましい。金属層入り多層膜および他の多層膜は、いずれもレンズ基材の表面上に直接位置してもよく、一層以上の他の層を介して間接的にレンズ基材の表面上に位置してもよい。レンズ基材と多層膜との間に形成され得る層としては、例えば、偏光層、調光層、ハードコート層等を挙げることができる。ハードコート層を設けることにより眼鏡レンズの耐久性(強度)を高めることができる。ハードコート層は、例えば硬化性組成物を硬化した硬化層であることができる。ハードコート層の詳細については、例えば特開2012-128135号公報の段落0025~0028、0030を参照できる。また、レンズ基材と上記多層膜との間には、密着性向上のためのプライマー層を形成してもよい。プライマー層の詳細については、例えば特開2012-128135号公報の段落0029~0030を参照できる。
金属層入り多層膜の層構成としては、例えば、レンズ基材側からレンズ最表面側に向かって、
第一層(高屈折率層)/第二層(金属層)/第三層(低屈折率層)/第四層(高屈折率層)/第五層(低屈折率層)の順に積層された構成;
第一層(低屈折率層)/第二層(高屈折率層)/第三層(低屈折率層)/第四層(高屈折率層)/第五層(金属層)/第六層(低屈折率層)/第七層(高屈折率層)/第八層(低屈折率層)の順に積層された構成:
第一層(高屈折率層)/第二層(金属層)/第三層(高屈折率層)/第四層(低屈折率層)の順に積層された構成、
等を挙げることができる。なお、上記の層構成の例示において、「/」との表記は、「/」の左に記載されている層と右に記載されている層が隣接する場合と、「/」の左に記載されている層と右に記載されている層の間に後述する導電性酸化物層が存在す場合とを包含する意味で用いられている。
導電性酸化物層としては、眼鏡レンズの透明性の観点から、膜厚10.0nm以下の酸化インジウムスズ(tin-doped indium oxide;ITO)層、膜厚10.0nm以下のスズ酸化物層、および膜厚10.0nm以下のチタン酸化物層が好ましい。酸化インジウムスズ(ITO)層とは、ITOを主成分として含む層である。この点は、スズ酸化物層、チタン酸化物層についても同様である。金属層入り多層膜および他の多層膜は、導電性酸化物層を含むことにより、眼鏡レンズが帯電し塵や埃が付着することを防ぐことができる。なお本発明および本明細書において、金属層入り多層膜および他の多層膜に含まれる「金属層」、「高屈折率層」および「低屈折率層」としては、膜厚10.0nm以下の酸化インジウムスズ(ITO)層、膜厚10.0nm以下のスズ酸化物層、および膜厚10.0nm以下のチタン酸化物層は考慮されないものとする。即ち、これらの層の一層以上が金属層入り多層膜または他の多層膜に含まれる場合であっても、これらの層は「金属層」、「高屈折率層」または「低屈折率層」とは見做さないものとする。膜厚10.0nm以下の上記の導電性酸化物層の膜厚は、例えば0.1nm以上であることができる。
上記眼鏡レンズが、物体側表面および眼球側表面の一方の表面上に金属層入り多層膜を有し、他方の表面上に他の多層膜を有する場合、他の多層膜としては、眼鏡レンズに反射防止膜として通常設けられる多層膜を形成することが好ましい。反射防止膜としては、可視光(380~780nmの波長域の光)に対して反射防止効果を発揮する多層膜を挙げることができる。そのような多層膜の構成は公知である。他の多層膜は、例えば無機多層膜であることができる。例えば、他の多層膜としては、高屈折率層と低屈折率層が交互に合計3~10層積層された多層膜を挙げることができる。高屈折率層および低屈折率層の詳細は、先に記載した通りである。また、他の多層膜に含まれる低屈折率層と高屈折率層の組み合わせの好ましい一例としては、ケイ素酸化物を主成分とする膜(低屈折率層)とジルコニウム酸化物を主成分とする膜(高屈折率層)との組み合わせを挙げることができる。また、ケイ素酸化物を主成分とする膜(低屈折率層)とニオブ酸化物を主成分とする膜(高屈折率層)との組み合わせを挙げることもできる。上記組み合わせの二層の膜が隣接する積層構造を少なくとも1つ含む多層膜を、他の多層膜の好ましい一例として例示することができる。また、
(視感透過率)
上記眼鏡レンズは、一態様では、高い視感透過率を有する透明性に優れた眼鏡レンズであることができる。上記眼鏡レンズの視感透過率は、例えば35.0%以上であり、40.0%以上であることが好ましく、45.0%以上であることがより好ましく、50.0%以上であることが更に好ましく、55.0%以上であることが一層好ましく、60.0%以上であることがより一層好ましく、65.0%以上であることが更に一層好ましく、70.0%以上であることが更により一層好ましく、75.0%以上であることがなお一層好ましく、80.0%以上であることがなお更に一層好ましく、85.0%以上であることがなお更により一層好ましい。また、上記眼鏡レンズの視感透過率は、例えば95.0%以下であり、90.0%以下であることもできる。金属層入り多層膜に含まれる金属層を薄膜(詳しくは膜厚1.0~10.0nm)とすることにより、視感透過率を大きく下げることなく先に記載した青色光カット率を実現し、かつ黄色みを低減することができる。
眼鏡レンズの外観品質向上の観点からは、眼鏡レンズの物体側表面において測定される視感反射率は低いことが好ましい。また、眼鏡レンズの装用感向上の観点からは、眼鏡レンズの眼球側表面において測定される視感反射率は低いことが好ましい。外観品質向上の観点からは、眼鏡レンズの物体側表面において測定される視感反射率は1.80%以下であることが好ましく、1.50%以下であることがより好ましく、1.30%以下であることがより好ましい。一方、装用感向上の観点からは、眼鏡レンズの眼球側表面において測定される視感反射率は1.80%以下であることが好ましく、1.50%以下であることがより好ましく、1.30%以下であることがより好ましい。
眼鏡レンズの物体側表面において測定される視感反射率および眼球側表面において測定される視感反射率は、それぞれ、例えば0.10%以上、0.20%以上、0.30%以上、0.40%以上、または0.50%以上であることができるが、上記の下限は例示であって、これらに限定されるものではない。レンズ基材の物体側表面上および/または眼球側表面上に設けられる金属層入り多層膜または他の多層膜の膜設計によって、上記視感反射率を実現することができる。膜設計は、公知の方法による光学的シミュレーションによって行うことができる。
上記眼鏡レンズは、21.0%以上の青色光カット率を示すため、眼鏡装用者の眼に入射する青色光の光量を低減することができる。ただし、眼鏡レンズの両表面において測定される青色光反射率は1.00%以下であるため、青色光が選択的に反射されることにより眼鏡装用者の視界が黄色みを帯びることを抑制することができる。好ましくは、上記眼鏡レンズは、10.0%以下のYI値を示すことができる。YI値は、9.0%以下であることがより好ましく、8.0%以下であることが更に好ましく、7.0%以下であることが一層好ましい。また、YI値は、例えば2.0%以上または3.0%以上であることができるが、YI値が低いほど黄色みが低減され好ましいため、上記の例示した下限を上回ってもよい。
ところで、一般的な眼鏡レンズは反射防止膜を有するが、通常の反射防止膜は、人の眼が違和感を感じ難い緑色の干渉色を呈するように設計されている。そのような眼鏡レンズは、反射防止膜を有する側の表面において測定される主波長は、通常、緑色光の波長域となる。一方、先に記載したように、青色光による眼への負担を軽減するための手段としては、従来、眼鏡レンズ基材の表面上に青色光を選択的に反射する性質を有する多層膜を設けることが提案されていた。しかし、そのような多層膜を設けた眼鏡レンズは、この多層膜を有する側の表面において青色光を強く反射するため、この表面において測定される主波長は、通常、緑色光の波長域より短波長側の青色光の波長域にある。このような眼鏡レンズは、この眼鏡レンズを観察して確認される干渉色は青色であるため、緑色の干渉色を呈する反射防止膜を有する通常の眼鏡レンズとは外観が異なる。この外観の違いに関して、近年、青色光に対する対策は施されているものの通常の眼鏡レンズと同様の外観を有する眼鏡レンズに対するニーズがある。
上記の点について、本発明の一態様にかかる眼鏡レンズは、青色光カット率は高いものの、眼鏡レンズの両表面で測定される青色光反射率は1.00%以下と低いため、一態様では、緑色の波長域に主波長を有することができる。詳しくは、上記眼鏡レンズは、眼鏡レンズの物体側表面において測定される主波長および眼鏡レンズの眼球側表面において測定される主波長の少なくとも一方が、500.0~550.0nmの範囲であることができる。500.0~550.0nmは緑色光の波長域であるため、少なくとも一方の表面において500.0~550.0nmの波長域に主波長を有する眼鏡レンズは、その表面側から観察されると、通常の眼鏡レンズと同様に緑色の干渉色を呈することができる。眼鏡を装用した装用者と向かい合った第三者が認識する眼鏡レンズの外観には、物体側の干渉色が与える影響が大きいため、少なくとも物体側表面において測定される主波長が500.0~550.0nmの範囲であることが好ましい。また、眼鏡レンズの外観品質の観点からは、眼鏡レンズの両表面で観察される干渉色が同様の色であることが好ましい。そのため、眼鏡レンズの両表面において測定される主波長がいずれも500.0~550.0nmの範囲であることがより好ましい。一態様では、上記眼鏡レンズの各表面において測定される主波長は、例えば510.0nm以上であることができる。また、一態様では、上記眼鏡レンズの各表面において測定される主波長は、例えば540.0nm以下であることもできる。
主波長に関しては、金属層がレンズ基材に近い位置にある場合とレンズ基材から遠い位置にある場合とを対比すると、金属層がレンズ基材により近い位置にある場合に、主波長がより長波長側にある傾向がある。
本発明の更なる態様は、上記の本発明の一態様にかかる眼鏡レンズを備えた眼鏡に関する。この眼鏡に含まれる眼鏡レンズの詳細については、先に記載した通りである。上記眼鏡レンズは、かかる眼鏡レンズを備えることにより、眼鏡装用者の眼への青色光による負担を軽減することができる。更に、上記眼鏡に備えられた眼鏡レンズによれば、眼鏡装用者の視界が黄色みを帯びることを防ぐことができる。フレーム等の眼鏡の構成については、特に制限はなく、公知技術を適用することができる。
(1)青色光吸収性化合物を含むレンズ基材(レンズ基材A)の作製
ビス-(β-エピチオプロピル)スルフィド100.00質量部、青色光吸収性化合物である2-(3-tertブチル-2-ヒドロキシ-5-メチルフェニル)-5-クロロ-2H-ベンゾトリアゾール0.40質量部を攪拌混合した後、触媒としてテトラ-n-ブチルホスホニュウムブロマイド0.05質量部を添加し、10mmHgの減圧下で3分間攪拌混合し、レンズ用モノマー組成物(硬化性組成物)を調製した。次いで、このレンズ用モノマー組成物を、予め準備したガラス製モールドと樹脂製ガスケットから構成されるレンズ成型用鋳型(0.00D、肉厚2.0mmに設定)の中に注入し、炉内温度20℃~100℃の電気炉中で20時間かけて重合を行った。重合終了後、ガスケットおよびモールドを取り外した後、110℃で1時間熱処理してプラスチックレンズ(レンズ基材A)を得た。得られたレンズ基材Aは、物体側表面が凸面、眼球側表面が凹面、屈折率は1.60であった。
レンズ基材Aの両表面を光学的に加工(研磨)して光学面とした後に、両表面上にそれぞれ膜厚3000nmのハードコート層(硬化性組成物を硬化した硬化層)を形成した。
物体側のハードコート層表面上および眼球側のハードコート層表面上に、それぞれ、アシストガスとして酸素ガスおよび窒素ガスを用いて、イオンアシスト蒸着により表1(表1-1、表1-2)に示す構成の多層蒸着膜を成膜した。
こうして、物体側に金属層(クロム(金属Cr)層)入り多層膜を有し、眼球側に他の多層膜(金属層を含まない)を有する実施例1の眼鏡レンズを得た。
本実施例では、凸面側、凹面側とも、多層蒸着膜は、レンズ基材側(ハードコート層側)から眼鏡レンズの表面側に向かって、1層、2層・・・の順に積層し、眼鏡レンズ表面側の最外層が表1中の最下欄に記載の層になるように形成した。また、本実施例では、不可避的に混入する可能性のある不純物を除けば表1に示す酸化物またはクロム(金属Cr)からなる蒸着源(成膜材料)を使用して成膜を行った。したがって、ここで形成された金属層は、クロム層(金属Cr層)である。各酸化物の屈折率および各層の膜厚を表1に示す。これらの点は、後述の実施例および比較例についても同様である。
レンズ基材Aの両表面を光学的に加工(研磨)して光学面とした後に、両表面上にそれぞれ膜厚3000nmのハードコート層(硬化性組成物を硬化した硬化層)を形成した。
物体側のハードコート層表面上および眼球側のハードコート層表面上に、それぞれ、アシストガスとして酸素ガスおよび窒素ガスを用いて、イオンアシスト蒸着により表2(表2-1、表2-2)に示す構成の多層蒸着膜を成膜した。
こうして、物体側に金属層(クロム(金属Cr)層)入り多層膜を有し、眼球側に他の多層膜(金属層を含まない)を有する実施例2の眼鏡レンズを得た。
レンズ基材Aの両表面を光学的に加工(研磨)して光学面とした後に、両表面上にそれぞれ膜厚3000nmのハードコート層(硬化性組成物を硬化した硬化層)を形成した。
物体側のハードコート層表面上および眼球側のハードコート層表面上に、それぞれ、アシストガスとして酸素ガスおよび窒素ガスを用いて、イオンアシスト蒸着により表3(表3-1、表3-2)に示す構成の多層蒸着膜を成膜した。
こうして、物体側に金属層(クロム(金属Cr)層)入り多層膜を有し、眼球側に他の多層膜(金属層を含まない)を有する実施例3の眼鏡レンズを得た。
レンズ基材Aの両表面を光学的に加工(研磨)して光学面とした後に、両表面上にそれぞれ膜厚3000nmのハードコート層(硬化性組成物を硬化した硬化層)を形成した。
物体側のハードコート層表面上および眼球側のハードコート層表面上に、それぞれ、アシストガスとして酸素ガスおよび窒素ガスを用いて、イオンアシスト蒸着により表4(表4-1、表4-2)に示す構成の多層蒸着膜を成膜した。
こうして、物体側に金属層(ニッケル(金属Ni)層)入り多層膜を有し、眼球側に他の多層膜(金属層を含まない)を有する実施例4の眼鏡レンズを得た。
レンズ基材Aの両表面を光学的に加工(研磨)して光学面とした後に、両表面上にそれぞれ膜厚3000nmのハードコート層(硬化性組成物を硬化した硬化層)を形成した。
物体側のハードコート層表面上および眼球側のハードコート層表面上に、それぞれ、アシストガスとして酸素ガスおよび窒素ガスを用いて、イオンアシスト蒸着により表5(表5-1、表5-2)に示す構成の多層蒸着膜を成膜した。
こうして、物体側に金属層(クロム(金属Cr)層)入り多層膜を有し、眼球側に他の多層膜(金属層を含まない)を有する実施例5の眼鏡レンズを得た。
レンズ基材Aの両表面を光学的に加工(研磨)して光学面とした後に、両表面上にそれぞれ膜厚3000nmのハードコート層(硬化性組成物を硬化した硬化層)を形成した。
物体側のハードコート層表面上および眼球側のハードコート層表面上に、それぞれ、アシストガスとして酸素ガスおよび窒素ガスを用いて、イオンアシスト蒸着により表6(表6-1、表6-2)に示す構成の多層蒸着膜を成膜した。
こうして、物体側に金属層(クロム(金属Cr)層)入り多層膜を有し、眼球側に他の多層膜(金属層を含まない)を有する実施例6の眼鏡レンズを得た。
レンズ基材Aの両表面を光学的に加工(研磨)して光学面とした後に、両表面上にそれぞれ膜厚3000nmのハードコート層(硬化性組成物を硬化した硬化層)を形成した。
物体側のハードコート層表面上および眼球側のハードコート層表面上に、それぞれ、アシストガスとして酸素ガスおよび窒素ガスを用いて、イオンアシスト蒸着により表8に示す構成の多層蒸着膜を成膜した。
こうして、物体側および眼球側に他の多層膜(金属層を含まない)を有する比較例1の眼鏡レンズを得た。
レンズ基材Aの両表面を光学的に加工(研磨)して光学面とした後に、両表面上にそれぞれ膜厚3000nmのハードコート層(硬化性組成物を硬化した硬化層)を形成した。
物体側のハードコート層表面上および眼球側のハードコート層表面上に、それぞれ、アシストガスとして酸素ガスおよび窒素ガスを用いて、イオンアシスト蒸着により表9に示す構成の多層蒸着膜を成膜した。
こうして、物体側および眼球側に他の多層膜(金属層を含まない)を有する比較例2の眼鏡レンズを得た。
<1.眼鏡レンズの青色光カット率、視感透過率>
実施例および比較例の各眼鏡レンズの直入射透過分光特性を、日立製作所製分光光度計U4100を用いて、眼鏡レンズの物体側の表面側(凸面側)から物体側表面の光学中心に光を入射させて波長380nmから780nmまで1nmピッチで測定した。
測定結果を用いて、先に記載した方法により、青色光カット率および視感透過率を求めた。
実施例および比較例の各眼鏡レンズの物体側から、物体側表面(凸面側)の光学中心における直入射反射分光特性を測定した。
測定結果を用いて、先に記載した方法により400~500nmの波長域における物体側表面における平均反射率(青色光反射率)および視感反射率を、それぞれ求めた。
また、実施例および比較例の各眼鏡レンズの眼球側から、眼球側表面(凹面側)の光学中心における直入射反射分光特性を測定した。
測定結果を用いて、先に記載した方法により400~500nmの波長域における眼球側表面における平均反射率(青色光反射率)および視感反射率を、それぞれ求めた。
上記測定は、オリンパス社製レンズ反射率測定器USPM-RUを用いて行った(測定ピッチ:1nm)。
実施例1の眼鏡レンズについて得られた反射分光スペクトルを図1に示し、実施例2の眼鏡レンズについて得られた反射分光スペクトルを図2に示す。
上記2.で眼鏡レンズの物体側表面について得られた直入射反射分光特性の測定結果を用いて、JIS Z 8781-3:2016の附属書JAにしたがい眼鏡レンズの物体側表面において測定される主波長を求めた。
また、上記2.で眼鏡レンズの眼球側表面について得られた直入射反射分光特性の測定結果を用いて、JIS Z 8781-3:2016の附属書JAにしたがい眼鏡レンズの眼球側表面において測定される主波長を求めた。
上記1.で得られた直入射透過分光特性の測定結果を用いて、JIS K 7373:2006にしたがいYI値を求めた。具体的には、直入射透過分光特性の測定により得られた透過スペクトルから、JIS Z 8701:1999の式(3)にしたがって、X, Y, Zを算出し、JIS K 7373:2006の6.1節の計算式により、D65光源に対するYI値を算出した。
これに対し、表6に示されている結果から、実施例1~6の眼鏡レンズは、21.0%以上の高い青色光カット率を示し、かつ比較例1の眼鏡レンズと比べてYI値が低く眼鏡装用者が視認する黄色みが低減されていることが確認できる。
Claims (8)
- 青色光吸収性化合物を含むレンズ基材と、
膜厚1.0~10.0nmの金属層を含む多層膜と、
を有し、
青色光カット率が21.0%以上であり、
物体側表面において測定される400~500nmの波長域における平均反射率が1.00%以下であり、かつ
眼球側表面において測定される400~500nmの波長域における平均反射率が1.00%以下である、眼鏡レンズ。 - 眼鏡レンズの物体側表面において測定される主波長は、500.0~550.0nmの範囲である、請求項1に記載の眼鏡レンズ。
- 眼鏡レンズの眼球側表面において測定される主波長は、500.0~550.0nmの範囲である、請求項1または2に記載の眼鏡レンズ。
- 前記レンズ基材の物体側表面上および眼球側表面上に多層膜が位置し、
前記金属層を含む多層膜は、前記レンズ基材の物体側表面上に位置する多層膜である、請求項1~3のいずれか1項に記載の眼鏡レンズ。 - 前記金属層は、クロム層である、請求項1~4のいずれか1項に記載の眼鏡レンズ。
- 前記金属層は、ニッケル層である、請求項1~4のいずれか1項に記載の眼鏡レンズ。
- 視感透過率が80.0%以上である、請求項1~6のいずれか1項に記載の眼鏡レンズ。
- 請求項1~7のいずれか1項に記載の眼鏡レンズを備えた眼鏡。
Priority Applications (7)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
AU2018334589A AU2018334589B2 (en) | 2017-09-29 | 2018-09-28 | Spectacle lens and spectacles |
JP2018553167A JP6473282B1 (ja) | 2017-09-29 | 2018-09-28 | 眼鏡レンズおよび眼鏡 |
CA3038077A CA3038077C (en) | 2017-09-29 | 2018-09-28 | Spectacle lens and spectacles |
KR1020197008266A KR102189656B1 (ko) | 2017-09-29 | 2018-09-28 | 안경 렌즈 및 안경 |
EP18857402.4A EP3505998A4 (en) | 2017-09-29 | 2018-09-28 | EYEWEAR AND GLASSES |
CN201880003676.2A CN110073281A (zh) | 2017-09-29 | 2018-09-28 | 眼镜镜片及眼镜 |
US16/365,004 US11137623B2 (en) | 2017-09-29 | 2019-03-26 | Spectacle lens and spectacles |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2017191687 | 2017-09-29 | ||
JP2017-191687 | 2017-09-29 |
Related Child Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US16/365,004 Continuation US11137623B2 (en) | 2017-09-29 | 2019-03-26 | Spectacle lens and spectacles |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2019065989A1 true WO2019065989A1 (ja) | 2019-04-04 |
Family
ID=65903464
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/JP2018/036302 WO2019065989A1 (ja) | 2017-09-29 | 2018-09-28 | 眼鏡レンズおよび眼鏡 |
Country Status (8)
Country | Link |
---|---|
US (1) | US11137623B2 (ja) |
EP (1) | EP3505998A4 (ja) |
JP (1) | JP7274875B2 (ja) |
KR (1) | KR102189656B1 (ja) |
CN (1) | CN110073281A (ja) |
AU (1) | AU2018334589B2 (ja) |
CA (1) | CA3038077C (ja) |
WO (1) | WO2019065989A1 (ja) |
Families Citing this family (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US10830930B1 (en) | 2019-09-09 | 2020-11-10 | Apple Inc. | Antireflective infrared cut filter coatings for electronic devices |
US11835739B2 (en) * | 2020-02-14 | 2023-12-05 | Texas Instruments Incorporated | Dark mirror thin films |
EP4095570A1 (en) * | 2021-05-27 | 2022-11-30 | Essilor International | Optical lens having an asymmetric mirror |
Citations (14)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH01163012A (ja) | 1987-09-22 | 1989-06-27 | Hoya Corp | ポリウレタンレンズの製造方法 |
JPH03281312A (ja) | 1990-03-30 | 1991-12-12 | Hoya Corp | ポリウレタンレンズの製造方法 |
JPH0763902A (ja) | 1993-08-31 | 1995-03-10 | Hoya Corp | プラスチックレンズ用組成物及びプラスチックレンズの製造方法 |
JPH07104101A (ja) | 1993-09-29 | 1995-04-21 | Hoya Corp | ポリウレタンレンズの製造方法 |
JPH09208621A (ja) | 1996-01-31 | 1997-08-12 | Nippon Zeon Co Ltd | ジエン系ゴム |
JPH09255781A (ja) | 1996-01-17 | 1997-09-30 | Mitsubishi Gas Chem Co Inc | 新規なエピスルフィド化合物 |
JP2012128135A (ja) | 2010-12-15 | 2012-07-05 | Seiko Epson Corp | 光学物品およびその製造方法 |
JP2013008052A (ja) | 2010-09-29 | 2013-01-10 | Nikon-Essilor Co Ltd | 光学部品およびその製造方法 |
WO2014050930A1 (ja) * | 2012-09-28 | 2014-04-03 | 株式会社ニコン・エシロール | 光学部品およびその製造方法 |
WO2015046540A1 (ja) * | 2013-09-30 | 2015-04-02 | ホヤ レンズ タイランド リミテッド | 透明プラスチック基材及びプラスチックレンズ |
WO2015122278A1 (ja) * | 2014-02-13 | 2015-08-20 | 東海光学株式会社 | 光学製品並びに眼鏡レンズ及び眼鏡 |
WO2015137282A1 (ja) * | 2014-03-14 | 2015-09-17 | ホヤ レンズ タイランド リミテッド | ミラーコートレンズ |
WO2016060257A1 (ja) * | 2014-10-17 | 2016-04-21 | ホヤ レンズ タイランド リミテッド | 眼鏡レンズおよび眼鏡 |
WO2016088763A1 (ja) * | 2014-12-01 | 2016-06-09 | ホヤ レンズ タイランド リミテッド | 眼鏡レンズおよび眼鏡 |
Family Cites Families (20)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5195858A (en) * | 1975-01-14 | 1976-08-23 | ****** *** *ku***chi*se*ku*******ka*****************chi***ne******** | |
JPS5766401A (en) * | 1980-10-13 | 1982-04-22 | Seiko Epson Corp | Synthetic resin lens |
US6172812B1 (en) * | 1997-01-27 | 2001-01-09 | Peter D. Haaland | Anti-reflection coatings and coated articles |
JP4524877B2 (ja) * | 2000-07-17 | 2010-08-18 | コニカミノルタホールディングス株式会社 | 眼鏡用レンズ |
US8500274B2 (en) * | 2000-11-03 | 2013-08-06 | High Performance Optics, Inc. | Dual-filter ophthalmic lens to reduce risk of macular degeneration |
JP4643233B2 (ja) | 2004-11-17 | 2011-03-02 | 株式会社乾レンズ | 眼鏡用レンズ、及び、眼鏡 |
EP3123980A1 (en) * | 2005-09-08 | 2017-02-01 | Calhoun Vision, Inc. | Adjustable optical elements with enhanced ultraviolet protection |
WO2007077641A1 (ja) * | 2005-12-28 | 2007-07-12 | Tokai Optical Co., Ltd. | 眼鏡レンズおよび眼鏡 |
US20070216861A1 (en) * | 2006-03-20 | 2007-09-20 | Andrew Ishak | Ophthalmic system combining ophthalmic components with blue light wavelength blocking and color-balancing functionalities |
GB0617806D0 (en) | 2006-09-11 | 2006-10-18 | Johnson Matthey Plc | Fuel cell assembly |
JP5195858B2 (ja) | 2010-09-22 | 2013-05-15 | 日立金属株式会社 | 窒化珪素基板 |
CN103688145B (zh) * | 2011-03-03 | 2020-03-17 | 恩光码公司 | 多频带色觉滤波器和使用线性程序解算器优化的方法 |
US10330953B2 (en) * | 2012-05-16 | 2019-06-25 | Essilor International | Ophthalmic lens |
JP2015049338A (ja) * | 2013-08-30 | 2015-03-16 | Hoya株式会社 | 眼鏡レンズおよびその製造方法 |
US9885885B2 (en) * | 2013-11-27 | 2018-02-06 | 3M Innovative Properties Company | Blue edge filter optical lens |
EP2887129B1 (en) * | 2013-12-23 | 2020-04-22 | Essilor International | Transparent optical article having a colorless appearance |
CN103984120B (zh) * | 2014-05-30 | 2015-06-10 | 奥特路(漳州)光学科技有限公司 | 一种防蓝光光学镜片的制造方法 |
US20170097521A1 (en) * | 2015-10-01 | 2017-04-06 | Tokai Optical Co., Ltd. | Optical product and spectacle lens |
US10444546B2 (en) * | 2015-10-02 | 2019-10-15 | 3M Innovative Properties Company | Optical filter |
CN105353528B (zh) * | 2015-12-15 | 2018-01-02 | 龙南县生产力促进中心 | 一种防蓝光镜片及其制备方法 |
-
2018
- 2018-09-28 CN CN201880003676.2A patent/CN110073281A/zh active Pending
- 2018-09-28 KR KR1020197008266A patent/KR102189656B1/ko active IP Right Grant
- 2018-09-28 EP EP18857402.4A patent/EP3505998A4/en active Pending
- 2018-09-28 CA CA3038077A patent/CA3038077C/en active Active
- 2018-09-28 AU AU2018334589A patent/AU2018334589B2/en active Active
- 2018-09-28 WO PCT/JP2018/036302 patent/WO2019065989A1/ja unknown
-
2019
- 2019-01-24 JP JP2019010368A patent/JP7274875B2/ja active Active
- 2019-03-26 US US16/365,004 patent/US11137623B2/en active Active
Patent Citations (14)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH01163012A (ja) | 1987-09-22 | 1989-06-27 | Hoya Corp | ポリウレタンレンズの製造方法 |
JPH03281312A (ja) | 1990-03-30 | 1991-12-12 | Hoya Corp | ポリウレタンレンズの製造方法 |
JPH0763902A (ja) | 1993-08-31 | 1995-03-10 | Hoya Corp | プラスチックレンズ用組成物及びプラスチックレンズの製造方法 |
JPH07104101A (ja) | 1993-09-29 | 1995-04-21 | Hoya Corp | ポリウレタンレンズの製造方法 |
JPH09255781A (ja) | 1996-01-17 | 1997-09-30 | Mitsubishi Gas Chem Co Inc | 新規なエピスルフィド化合物 |
JPH09208621A (ja) | 1996-01-31 | 1997-08-12 | Nippon Zeon Co Ltd | ジエン系ゴム |
JP2013008052A (ja) | 2010-09-29 | 2013-01-10 | Nikon-Essilor Co Ltd | 光学部品およびその製造方法 |
JP2012128135A (ja) | 2010-12-15 | 2012-07-05 | Seiko Epson Corp | 光学物品およびその製造方法 |
WO2014050930A1 (ja) * | 2012-09-28 | 2014-04-03 | 株式会社ニコン・エシロール | 光学部品およびその製造方法 |
WO2015046540A1 (ja) * | 2013-09-30 | 2015-04-02 | ホヤ レンズ タイランド リミテッド | 透明プラスチック基材及びプラスチックレンズ |
WO2015122278A1 (ja) * | 2014-02-13 | 2015-08-20 | 東海光学株式会社 | 光学製品並びに眼鏡レンズ及び眼鏡 |
WO2015137282A1 (ja) * | 2014-03-14 | 2015-09-17 | ホヤ レンズ タイランド リミテッド | ミラーコートレンズ |
WO2016060257A1 (ja) * | 2014-10-17 | 2016-04-21 | ホヤ レンズ タイランド リミテッド | 眼鏡レンズおよび眼鏡 |
WO2016088763A1 (ja) * | 2014-12-01 | 2016-06-09 | ホヤ レンズ タイランド リミテッド | 眼鏡レンズおよび眼鏡 |
Non-Patent Citations (1)
Title |
---|
See also references of EP3505998A4 |
Also Published As
Publication number | Publication date |
---|---|
CA3038077C (en) | 2021-05-18 |
EP3505998A4 (en) | 2020-05-06 |
AU2018334589B2 (en) | 2020-03-26 |
JP2019082718A (ja) | 2019-05-30 |
JP7274875B2 (ja) | 2023-05-17 |
CA3038077A1 (en) | 2019-03-29 |
KR102189656B1 (ko) | 2020-12-14 |
US20190219843A1 (en) | 2019-07-18 |
US11137623B2 (en) | 2021-10-05 |
AU2018334589A1 (en) | 2019-04-18 |
EP3505998A1 (en) | 2019-07-03 |
KR20190040052A (ko) | 2019-04-16 |
CN110073281A (zh) | 2019-07-30 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
JP7274874B2 (ja) | 眼鏡レンズおよび眼鏡 | |
JP6974305B2 (ja) | 眼鏡レンズおよび眼鏡 | |
JP7274875B2 (ja) | 眼鏡レンズおよび眼鏡 | |
US11262601B2 (en) | Spectacle lens and spectacles | |
JP6473282B1 (ja) | 眼鏡レンズおよび眼鏡 | |
JP6873880B2 (ja) | 眼鏡レンズおよび眼鏡 |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
ENP | Entry into the national phase |
Ref document number: 2018553167 Country of ref document: JP Kind code of ref document: A |
|
ENP | Entry into the national phase |
Ref document number: 20197008266 Country of ref document: KR Kind code of ref document: A |
|
ENP | Entry into the national phase |
Ref document number: 2018857402 Country of ref document: EP Effective date: 20190326 |
|
ENP | Entry into the national phase |
Ref document number: 2018334589 Country of ref document: AU Date of ref document: 20180928 Kind code of ref document: A |
|
121 | Ep: the epo has been informed by wipo that ep was designated in this application |
Ref document number: 18857402 Country of ref document: EP Kind code of ref document: A1 |
|
NENP | Non-entry into the national phase |
Ref country code: DE |