Eyeglass lens, eyeglasses, method for producing eyeglass lens, and optical member

Abstract

To provide an eyeglass lens that allows lens decoration with desired designs including letters, symbols, and patterns, in addition to technical or commercial marking, through enhancement of color tone variations.SOLUTION: An eyeglass lens and associated technology are provided. The eyeglass lens is provided with an object-side surface and an eyeball-side surface, comprising a lens substrate and an optical interference layer having a multilayered structure formed on at least one surface of the lens substrate, in which at least one surface of the eyeglass lens on which the optical interference layer is formed includes a first region in which a removal portion A, where at least one constituent layer of the optical interference layer is partially removed, is disposed with a first periodicity, with a non-removal portion where the one layer is not removed being present between the removal portions, and a second region which is a region having the removal portions A disposed with a second periodicity or being constituted by the non-removal portions. The first region and the second region are visible as regions having different color tones.SELECTED DRAWING: Figure 4

Description

[Technical Field]

[0001] The present specification is deemed to include the entire contents of Japanese Patent Application No. 2023-223197. Any content not described in this specification can be referenced from the description of Japanese Patent Application No. 2023-223197.

[0002] The present disclosure relates to eyeglass lenses, eyeglasses, methods for manufacturing eyeglass lenses, and optical members. [Background technology]

[0003] As is well known, eyeglasses are used by wearers to correct their eyesight or protect their eyes from strong light through eyeglass lenses, so it has been difficult to decorate eyeglass lenses without obstructing the wearer's vision.

[0004] On the other hand, Patent Document 1 proposes that marking be performed on an optical product coated with a multilayer interference coating, typically an eyeglass lens, by partially removing a portion of the layer formed on the eyeglass lens using a laser beam marking machine, as a permanent visible marking on the eyeglass lens. [Prior art documents] [Patent documents]

[0005] [Patent Document 1] Special Publication No. 2019-523447 Summary of the Invention [Problem to be solved by the invention]

[0006] According to Figures 8 and 9 of Patent Document 1, an optical product is obtained that includes a marking pattern formed by locally removing an interference coating with a laser in the shape of predetermined characters. In other words, the eyeglass lens shown in Patent Document 1 is composed of two types of parts: parts where the interference coating has been locally removed, and parts where it has not (parts where the interference coating remains intact). This means that when a third party (a person other than the person wearing the lens, an observer) looks at the object-side surface of the eyeglass lens while it is being worn, only two types of color tones appear.

[0007] In one embodiment of the present invention, an object is to increase the variety of color tones in a spectacle lens in which a localized partial removal of an optical interference layer is employed, compared to conventional lenses. From another perspective, it is an object of the present invention to provide spectacle lenses, spectacles, and a method for manufacturing spectacle lenses, which enable not only technical or commercial markings but also decorations of desired designs such as letters, symbols, and patterns to be applied to the lenses, and which are decorated with greater freedom and richer expression. [Means for solving the problem]

[0008] In an eyeglass lens, by locally removing at least a portion of the thin film that constitutes the laminated structure of an optical interference layer formed on the surface of the lens, the reflection characteristics of light generated in the removed portion can be changed compared to the non-removed portion.

[0009] In this removal, removed areas A, where at least one layer of the optical interference layer is locally removed, are arranged regularly (preferably repeatedly), while non-removed areas B, where the layer is not removed, are present between the removed areas. The inventors have found that this makes it possible to achieve a color tone γ that is different from the color tone α of an area consisting only of removed areas A, where the optical interference layer has been locally removed, and the color tone β of an area consisting only of non-removed areas B, where the optical interference layer remains intact.

[0010] FIG. 11 is a schematic cross-sectional view of a spectacle lens, showing how a viewer visually recognizes not the color tone α nor the color tone β but the color tone γ when looking at the spectacle lens in a worn state.

[0011] As shown in Figure 11, when removed portions A and non-removed portions B are adjacent to each other and regularly alternately arranged, reflected light A' from removed portions A and reflected light B' from non-removed portions B enter the viewer's pupil as a blended whole. As a result, the viewer perceives a color tone γ that is a mixture (e.g., light blue) of the color of light A' reflected from removed portions A (e.g., a metallic color close to gold, color tone α) and the color of light B' reflected from non-removed portions B (e.g., blue, color tone β). Based on this finding, the following solution to the above problem has been found.

[0012] The first aspect is A spectacle lens having an object-side surface and an eyeball-side surface, A lens substrate; an optical interference layer having a laminated structure provided on at least one surface of the lens substrate; and At least one of the surfaces of the eyeglass lens on which the optical interference layer is provided is a first region in which removed portions, in which at least one layer of the optical interference layer is locally removed, are arranged with a first regularity, and a non-removed portion, in which the layer is not removed, exists between the removed portions; a second region, which is a region in which the removed portions are arranged with a second regularity or a region consisting of the non-removed portions; and The first region and the second region are visually recognized as regions of different color tones from each other in the eyeglass lens.

[0013] The second aspect is In the spectacle lens according to the first aspect, the color tone includes at least one of brightness and darkness of color, color shading, brightness and darkness due to differences in the amount of reflected light, and brightness and darkness of brilliance occurring in the region.

[0014] The third aspect is The color tone is single within the first region, The spectacle lens according to any one of the first and second aspects, wherein the color tone is uniform within the second region.

[0015] The fourth aspect is the optical interference layer having a laminated structure is an antireflection film having a multilayer structure in which a low refractive index layer and a high refractive index layer are laminated, In the spectacle lens according to any one of the first to third aspects, the removed portion is formed by partially removing the low refractive index layer, which is the outermost layer of the multi-layer structure.

[0016] The fifth aspect is the first region; a second region in which the removed portions are arranged with a second regularity; and In the eyeglass lens according to any one of the first to fourth aspects, the first region and the second region have different arrangements of the removed portions.

[0017] The sixth aspect is In the spectacle lens according to any one of the first to fifth aspects, the first regularity is an aspect in which the removed portions are repeatedly arranged in at least one direction.

[0018] A seventh aspect is The eyeglass lens is described in any one of aspects 1 to 6, wherein, in a planar view of the eyeglass lens, the smallest unit of repetition of the removed portion in the first region is one dot-shaped removed portion, and the value of (minimum width + maximum width) / 2 for each of the dot-shaped removed portions is within a fluctuation range of 20% within the first region for 80% or more of the number of dots in the first region.

[0019] The eighth aspect is The eyeglass lens according to any one of the first to seventh aspects, wherein, in a plan view of the eyeglass lens, the minimum unit of repetition of the removed portions in the first region is a plurality of dot-shaped removed portions that are connected to each other.

[0020] A ninth aspect is The spectacle lens according to any one of aspects 1 to 8, wherein the non-removed portions of the first region surround each of the removed portions, or are surrounded by the removed portions, or are a combination thereof.

[0021] A tenth aspect is In a plan view of the eyeglass lens, when the directions perpendicular to each other are the X direction and the Y direction, and a combination of straight lines arranged at equal intervals in the X direction and straight lines arranged at equal intervals in the Y direction is defined as an XY grating, The eyeglass lens according to any one of aspects 1 to 9, wherein a common XY lattice is used in the first region and the second region, and each of the removed portions in the first region and each of the removed portions in the second region includes only one intersection of the XY lattice.

[0022] An eleventh aspect is In a plan view of the eyeglass lens, the removed portions in the first region are formed by thinning out the removed portions in accordance with a first thinning rule from a virtual state in which removed portions are formed at all intersections of the XY lattice; The spectacle lens according to any one of aspects 1 to 10, wherein the removed portions in the second region are formed by thinning out the removed portions in accordance with a second thinning rule that is different from the first thinning rule from a virtual state in which removed portions are formed at all of the intersections of the XY lattice.

[0023] A twelfth aspect is the first regularity includes a regularity of the center-to-center distances between the removed portions in one direction G in the first region, In the spectacle lens according to any one of the first to eleventh aspects, the second regularity includes a regularity of the center-to-center distance between the removed portions in one direction G in the second region.

[0024] A thirteenth aspect is In a plan view of the eyeglass lens, the center-to-center distance between adjacent removed portions in one direction H in the first region is T times the center-to-center distance between adjacent removed portions in the second region in the direction H, The spectacle lens according to any one of the first to twelfth aspects, wherein 0.9*m / n≦T≦1.1*m / n (where m and n are natural numbers).

[0025] A fourteenth aspect is In the spectacle lens according to any one of the first to thirteenth aspects, the second region is composed of only the removed portion.

[0026] A fifteenth aspect is The spectacle lens according to any one of the first to fourteenth aspects, wherein the luminous transmittance of the first region and the second region is both 80% or more.

[0027] A sixteenth aspect is The spectacle lens according to any one of the first to fifteenth aspects, wherein the maximum width of the removed portion is 200 μm or less.

[0028] A seventeenth aspect is A pair of eyeglasses comprising an eyeglass frame and a shaped eyeglass lens having an object-side surface and an eyeball-side surface, The eyeglasses are the eyeglass lenses according to any one of the first to sixteenth aspects.

[0029] The eighteenth aspect is A method of manufacturing a spectacle lens having an object-side surface and an eyeball-side surface, comprising: In a spectacle lens having a lens substrate and an optical interference layer having a laminated structure provided on at least one surface of the lens substrate, at least one of the surfaces on which the optical interference layer is provided is provided, a first region in which removed portions, in which at least one layer of the optical interference layer is locally removed by laser irradiation, are arranged with a first regularity, and non-removed portions, in which the layer is not removed, exist between the removed portions; a second region, which is a region where the removed portions are arranged with a second regularity by laser irradiation or a region consisting of the non-removed portions; Forming A method for manufacturing a spectacle lens in which the first region and the second region are visually recognized as regions with different color tones.

[0030] A nineteenth aspect is creating drawing data including a planned laser irradiation location on the surface provided with the optical interference layer from image data of a desired decorative design; a laser irradiation step of irradiating the optical interference layer with a laser beam while scanning the optical interference layer with the laser irradiation device using the drawing data to form the removed portion; and the optical interference layer having a laminated structure is an antireflection film having a multilayer structure in which a low refractive index layer and a high refractive index layer are laminated, In the method for manufacturing a spectacle lens according to an eighteenth aspect, the removed portion is formed by partially removing the low refractive index layer, which is the outermost layer of the multi-layer structure.

[0031] The twentieth aspect is the first region; a second region in which the removed portions are arranged with a second regularity by laser irradiation; Forming The method for manufacturing a spectacle lens according to any one of the eighteenth and nineteenth aspects, wherein the arrangement of the removed portions is made different between the first region and the second region.

[0032] A twenty-first aspect is When the mutually perpendicular directions are the X and Y directions, and the combination of lines arranged at equal intervals s in the X direction and lines arranged at equal intervals t in the Y direction is an XY lattice, The drawing data includes at least X and Y coordinates, Based on the relationship between the total amount of laser irradiation and the degree of damage to the layers below the high refractive index layer, A minimum center-to-center distance x0 between the centers of the laser irradiation, which indicates the degree of overlap of the laser irradiation points in the X direction, is set so as to suppress the occurrence of the damage, and the minimum center-to-center distance x0 is set to the equal interval s; A minimum center-to-center distance y0 between the centers of the laser irradiation, which indicates the degree of overlap of the laser irradiation points in the Y direction, is set so as to suppress the occurrence of the damage, and the minimum center-to-center distance y0 is set to the equal interval t; A common XY grating is used in the first area and the second area, A method for manufacturing a spectacle lens according to any one of the eighteenth to twentieth aspects, wherein each of the laser irradiation points in the first region and each of the laser irradiation points in the second region are set to include only one intersection point of the XY lattice.

[0033] A twenty-second aspect is The relationship between the total amount of laser irradiation and the degree of damage to the layers below the high refractive index layer; The size of one side of one pixel of the image data; Based on The method for manufacturing a spectacle lens according to any one of the eighteenth to twenty-first aspects, wherein the number of intersections of the XY lattice to be arranged within a portion corresponding to one pixel of the image data is set in the drawing data.

[0034] A twenty-third aspect is the laser irradiation points in the first region are arranged in a manner in which the irradiation points are thinned out in accordance with a first thinning rule from a virtual state in which the laser is irradiated onto all intersections of the XY lattice, A method for manufacturing a spectacle lens according to any one of aspects 18 to 22, wherein the laser irradiation points in the second region are arranged in such a manner that, from a virtual state in which the laser is irradiated to all of the intersections of the XY lattice, the irradiation points are thinned out in accordance with a second thinning regularity that is different from the first thinning regularity.

[0035] A twenty-fourth aspect is A method for manufacturing a spectacle lens according to any one of aspects 18 to 23, wherein the fluctuation range of the value of (minimum width+maximum width) / 2 at each of the laser irradiated points in the first region and the second region is within 20%.

[0036] The 25th aspect is In the method for manufacturing a spectacle lens according to any one of the eighteenth to twenty-fourth aspects, the drawing data corresponds one processing spot by laser irradiation to one pixel of the image data.

[0037] A twenty-sixth aspect is In the method for manufacturing a spectacle lens according to any one of the eighteenth to twenty-fifth aspects, the drawing data corresponds to a plurality of processing spots by laser irradiation for one pixel of the image data.

[0038] A twenty-seventh aspect is A method for manufacturing a spectacle lens according to any one of the eighteenth to twenty-sixth aspects, wherein the drawing data corresponds to one pixel of the image data with a plurality of processing spots formed by laser irradiation, with the processing spots partially overlapping each other.

[0039] A twenty-eighth aspect is The method for manufacturing a spectacle lens according to any one of the eighteenth to twenty-seventh aspects, wherein the laser is an ultrashort pulse laser having a pulse width of 10 femtoseconds or more and less than 100 picoseconds.

[0040] A twenty-ninth aspect is An optical element, A substrate; an optical interference layer having a laminated structure provided on a surface of the substrate; and The surface of the optical member on which the optical interference layer is provided is a first region in which removed portions, in which at least one layer of the optical interference layer is locally removed, are arranged with a first regularity, and a non-removed portion, in which the layer is not removed, exists between the removed portions; a second region, which is a region in which the removed portions are arranged with a second regularity or a region consisting of the non-removed portions; and The first region and the second region are optical elements that are visually recognized as regions with different color tones.

[0041] Another embodiment of the present disclosure is A spectacle lens having an object-side surface and an eyeball-side surface, A lens substrate; an optical interference layer having a laminated structure on either surface of the lens substrate, At least one layer of the optical interference layer has a visible decorative portion formed by locally removing the layer, the decorative portion has a plurality of regions in which the removed optical interference layer has different removal area ratios in a plan view, the plurality of regions includes a first region having a removal pattern in which the removal portions are arranged with a first regularity, with the minimum unit being a removal portion having a dimension of 200 μm or less, and The plurality of regions are visually recognized as regions having different color tones from one another. Regarding eyeglass lenses.

[0042] In the above embodiment, the color tone preferably includes brightness and darkness of color, color shading, brightness and darkness due to differences in the amount of reflected light, or brightness and brightness occurring in an area.

[0043] In the above embodiment, the removed portion preferably has a reflectance in the visible light region that is different from that of the non-removed portion of the optical interference layer.

[0044] In the above embodiment, the plurality of regions preferably includes a second region different from the first region, and the removal area ratio in the second region is 100%.

[0045] In the above embodiment, the luminous transmittance of the decorative portion is preferably 80% or more.

[0046] In the above embodiment, the removed optical interference layer preferably includes a low refractive index layer formed on the top layer of the laminate structure.

[0047] One embodiment of the present disclosure relates to eyeglasses comprising an eyeglass frame and a shaped eyeglass lens having an object-side surface and an eyeball-side surface, wherein the eyeglass lens is the eyeglass lens of the above embodiment.

[0048] One embodiment of the present disclosure comprises: A method for manufacturing a spectacle lens, comprising processing a spectacle lens having a lens substrate and an optical interference layer having a laminated structure formed on the lens substrate to form a decorative portion, A step of creating drawing data based on image data of a desired decorative design; a laser irradiation step of irradiating the optical interference layer with a laser beam while scanning the optical interference layer with the laser irradiation device using the drawing data to form the decorative portion; and the laser irradiation step locally removes at least one layer of the optical interference layer, thereby forming a plurality of regions of the removed optical interference layer with different removal area ratios in a plan view; the plurality of regions includes a first region having a removal pattern in which removed portions having a minimum unit dimension of 200 μm or less are arranged with a first regularity, The plurality of regions are visually recognized as regions having different color tones from one another. The present invention relates to a method for manufacturing eyeglass lenses.

[0049] In the above embodiment, the step of creating the drawing data preferably includes determining a correspondence relationship between the pixel size of the image data and the processing spot size produced by irradiation with one pulse of the pulsed laser.

[0050] In the above embodiment, the image data is preferably binary data, and the drawing data includes a removal pattern whose minimum unit is the pixel size of the image data, with the pixel size being within the range of 1 to 100 μm.

[0051] In the above embodiment, preferably, in the drawing data, the pitches in the X direction and the Y direction of each of the processing spots formed by irradiation with one pulse of the pulsed laser are both in the range of 1 to 100 μm.

[0052] In the above embodiment, the plurality of regions preferably includes a second region in which the removed portions are arranged without any gaps, resulting in a removed area ratio of 100%.

[0053] In the above embodiment, the drawing data may be such that one pixel of the image data corresponds to one processing spot by laser irradiation.

[0054] In the above embodiment, the drawing data may correspond to one pixel of the image data and a plurality of processing spots by laser irradiation.

[0055] In the above embodiment, the drawing data may correspond to one pixel of the image data with a plurality of processing spots formed by laser irradiation, with the spots partially overlapping each other.

[0056] In the above embodiment, the laser beam is preferably an ultrashort pulse laser having a pulse width of 10 femtoseconds or more and less than 100 picoseconds.

[0057] In the above embodiment, the optical interference layer preferably includes a reactive layer that is relatively more reactive to irradiation with a laser beam than other layers included in the laminate structure, and the reactive layer is at least partially removed by irradiation.

[0058] Another embodiment of the present disclosure is An optical element, A substrate; an optical interference layer having a laminated structure formed on the surface of the substrate, At least one layer of the optical interference layer has a visible decorative portion formed by locally removing the layer, the decorative portion has a plurality of regions in which the removed optical interference layer has different removal area ratios in a plan view, the plurality of regions includes a first region having a removal pattern in which the removal portions are arranged with a first regularity, with the minimum unit being a removal portion having a dimension of 200 μm or less, and The plurality of regions are visually recognized as regions having different color tones from one another. This relates to optical components.

[0059] The technical concept of the present invention is also reflected in eyeglasses in which the vicinity of the periphery of the eyeglass lens is cut based on a predetermined frame shape and the eyeglasses are fitted into the eyeglass frame.

[0060] The embodiments described above can be combined with each other in any way. [Effects of the Invention]

[0061] According to one embodiment of the present disclosure, it is possible to increase the variety of color tones in a spectacle lens in which a localized partial removal of an optical interference layer is employed, compared to conventional lenses. From another perspective, it is possible to provide spectacle lenses, spectacles, and methods for manufacturing spectacle lenses that allow a high degree of freedom in decorating spectacle lenses with desired designs. [Brief explanation of the drawings]

[0062] [Figure 1] FIG. 1 is a schematic front view of a spectacle lens according to this embodiment. [Figure 2] FIG. 2 is a schematic front view of another aspect of the spectacle lens according to this embodiment. [Figure 3] FIG. 3 is a schematic diagram of a removal pattern of an area formed by dots on a spectacle lens according to this embodiment. [Figure 4] FIG. 4 shows a removal pattern sample of an area formed by dots on a spectacle lens according to this embodiment. [Figure 5] FIG. 5 is a schematic cross-sectional view of a spectacle lens according to this embodiment. [Figure 6] FIG. 6 is a schematic front view of the eyeglass lens according to this embodiment. [Figure 7] FIG. 7 is a schematic cross-sectional view of a spectacle lens according to this embodiment. [Figure 8] FIG. 8 is a flow chart showing an example of the procedure of the method for manufacturing a spectacle lens according to this embodiment. [Figure 9] FIG. 9 is a flow chart showing an example of the procedure of the method for manufacturing a spectacle lens according to this embodiment. [Figure 10]FIG. 10 is an explanatory diagram showing an example of the schematic configuration of a laser processing device used in the method for manufacturing eyeglass lenses according to this embodiment. [Figure 11] FIG. 11 is a schematic cross-sectional view of a spectacle lens according to an embodiment, showing how, when a viewer looks at the spectacle lens in a worn state, the viewer visually recognizes not the color tone α nor the color tone β but the color tone γ. [Figure 12] 12 is a schematic diagram of a spectacle lens according to an embodiment, viewed from above, showing removed portions arranged with various regularities, with dashed lines representing area units and XY lattice lines representing imaginary lines. The white arrows indicate that the removed portions are arranged with varying regularity from the area at the base of the arrow to the area at the tip of the arrow. This figure shows an example in which all areas are formed on the surface, and each removed portion includes only one intersection of the XY lattice. [Figure 13] 13 is an explanatory diagram showing the correspondence between one pixel of image data and a processing spot produced by laser irradiation in an eyeglass lens according to an embodiment. (a) is a diagram showing a state in which 3×3 removed portions (the center-to-center distance of adjacent removed portions is x0' in both the X and Y directions) are connected in an XY lattice and set to one pixel. (b) is a diagram showing a state in which 2×2 removed portions (the center-to-center distance of adjacent removed portions is x0' in both the X and Y directions) are connected in an XY lattice and set to one pixel. (c) is a diagram showing a state in which 2×1 removed portions (the center-to-center distance of adjacent removed portions is x0'' which is smaller than x0') are connected in an XY lattice and set to one pixel. (d) is a diagram showing a state in which one removed portion is set to one pixel. [Figure 14] FIG. 14 is a plot of the average reflectance in Test Examples 1 to 3. DETAILED DESCRIPTION OF THE INVENTION

[0063] Hereinafter, embodiments of the present disclosure will be described in detail with reference to the drawings as necessary, but the present disclosure is not limited thereto and various modifications are possible without departing from the spirit thereof. In the drawings, the same elements are denoted by the same reference numerals, and redundant explanations will be omitted. Furthermore, positional relationships such as up, down, left, and right are based on the positional relationships shown in the drawings unless otherwise specified. Furthermore, the dimensional ratios of the drawings are not limited to those shown.

[0064] In this specification, for example, a numerical range such as "1 to 100" includes both the lower limit of "1" and the upper limit of "100." The same applies to other numerical ranges.

[0065] In this specification, the term "lens" includes spectacle lenses. A "spectacle lens" is a transparent body that has an object-side surface and an eyeball-side surface and a predetermined power (spherical power, astigmatism power, etc.) based on the prescription of the wearer (spectacles user). It usually has a spherical, aspherical, or progressive surface shape. In addition to eyeglasses intended to correct the user's refractive error, lenses with polarization, photochromic, and wavelength filter functions that cut out specific wavelengths are also included in this specification. In this specification, the term "lens" refers to uncut lenses before edging, or lenses after edging (processed lenses).

[0066] In this specification, the optical center side of the eyeglass lens is referred to as the inner side, and the outermost edge side of the eyeglass lens is referred to as the outer side. In this specification, an example is given in which the optical center is aligned with the geometric center and the centering center. Hereinafter, the optical center will also be referred to as the lens center.

[0067] When the spectacle lens is placed on a stand, the surface facing the object or the surface facing the eye faces up. Therefore, when discussing the configuration of each surface of the spectacle lens, we will assume a planar view.

[0068] In this specification, the left-right direction when the eyeglass lens is placed on the stand is defined as the X direction, the up-down direction as the Y direction, and the thickness direction of the eyeglass lens, which is perpendicular to the X and Y directions, as the Z direction. The Z direction is also the optical axis direction of the eyeglass lens. The lens origin, which is the origin of the eyeglass lens, is defined as the lens center.

[0069] When viewed from the wearer (i.e., from the viewer's perspective), the right is the +X direction, the left is the -X direction, the up is the +Y direction, the down is the -Y direction, the object side is the +Z direction, and the opposite direction (backward) is the -Z direction. These near and far directions relate to the light beam passing through the center of the pupil, and although X and Y coordinates must also be taken into account in the strict sense when viewing peripheral vision, they are defined as above in this specification for the sake of convenience. In this specification, "planar view" refers to the state when viewed from the +Z direction to the -Z direction.

[0070] [Eyeglass lenses] One aspect of this embodiment is a spectacle lens having an object-side surface and an eyeball-side surface, A lens substrate; an optical interference layer having a laminated structure provided on at least one surface of the lens substrate; and At least one of the surfaces of the eyeglass lens on which the optical interference layer is provided is a first region in which removed portions, in which at least one layer of the optical interference layer is locally removed, are arranged with a first regularity, and a non-removed portion, in which the layer is not removed, exists between the removed portions; a second region, which is a region in which the removed portions are arranged with a second regularity or a region consisting of the non-removed portions; and The present invention relates to a spectacle lens, wherein the first region and the second region are visually recognized as regions of different color tones.

[0071] According to one embodiment of the present disclosure, it is possible to increase the variety of color tones in a spectacle lens in which a localized partial removal of an optical interference layer is employed, compared to conventional lenses. From another perspective, it is possible to provide spectacle lenses, spectacles, and methods for manufacturing spectacle lenses that allow a high degree of freedom in decorating spectacle lenses with desired designs.

[0072] <Outline of eyeglass lens composition> Fig. 1 is a schematic front view of a spectacle lens according to this embodiment, and Fig. 2 is a schematic front view of a spectacle lens according to another embodiment. The eyeglass lens 1 according to this embodiment has a decorative portion that includes multiple regions as described above and is visible at least from the object-side surface. In Fig. 1, the decorative portion includes decorative portion X1 and decorative portion X2, and in Fig. 2, the decorative portion includes decorative portion X3.

[0073] In this specification, the "decorative portion" refers to a portion including a removed portion where at least one layer of the optical interference layer is locally removed, and corresponds to at least the first region. When the second region is a region where the removed portions are arranged with a second regularity, the second region also corresponds to the decorative portion.

[0074] The spectacle lens according to this embodiment has an object-side surface and an eyeball-side surface. The "object-side surface" is the surface that is located on the object side when spectacles equipped with the spectacle lens are worn by a wearer. The "eyeball-side surface" is the opposite, that is, the surface that faces the eyeball when spectacles equipped with the spectacle lenses are worn by a wearer. Generally, the surface on the object side is convex and the surface on the eyeball side is concave, that is, spectacle lenses are meniscus lenses. This is true for uncut lenses before edging, and for eyeglass lenses (processed lenses) after edging, in which the periphery is cut to fit the shape of the eyeglass frame. The contents of this paragraph also apply to the lens substrate (the lens body before the formation of a hard coating or anti-reflection coating) that forms the basis of a spectacle lens. In other words, the lens substrate also has an object-side surface and an eyeball-side surface.

[0075] The optical interference layer having a laminated structure may be a known one. A specific example will be described later. The optical interference layer may be provided on the surface of the spectacle lens where the removed portion is to be provided, but it may also be provided on both surfaces of the spectacle lens.

[0076] The decorative portion may be formed on either surface of the spectacle lens. It is visible from the object-side surface, but preferably also from the eyeball-side surface. Here, "visible" means that light (sunlight, illumination light, etc.) incident on the decorative portion is reflected by the decorative portion and can be seen by a third party (a person other than the wearer) when it enters their pupil. To be highly visible, the decorative portion preferably has a predetermined high reflectivity and is a smooth surface like a mirror that can specularly reflect incident light. This point will be discussed further below. In this specification, we will exemplify a case in which an optical interference layer is provided on both surfaces of a spectacle lens, but a removed portion is provided only on the eyeball-side surface.

[0077] In the above-mentioned removed portion, "at least one layer" refers to any single layer or multiple layers of the laminated structure. The state in which at least one layer is removed refers to the removal of one or multiple layers on the surface side of the laminated structure. Furthermore, "local" refers to a partial area on the lens surface.

[0078] The eyeglass lens 1 according to this embodiment also has a removed portion A where at least one layer of the laminate structure of the optical interference layer has been removed, and a non-removed portion B where this does not correspond to the removed portion A. As shown in the enlarged views of the decorative portions X1 and X2 at the bottom of Fig. 1, the region x1 corresponding to the decorative portion X1 and the region x2 corresponding to the decorative portion X2 each have a removed portion A where at least one layer of the laminate structure of the optical interference layer has been removed, and a non-removed portion B where this does not occur. As shown in the enlarged view of the decorative portion X3 at the bottom of Fig. 2, the regions x31, x32, and x33 constituting the decorative portion X3 each have a removed portion A where at least one layer of the laminate structure of the optical interference layer has been removed, and a non-removed portion B where this does not occur.

[0079] Because at least one layer of the laminated structure of the optical interference layer has been removed in the removed portion A compared to the non-removed portion B, the removed portion A and the non-removed portion B have different optical properties. This difference in optical properties between the removed portion A and the non-removed portion B results in a difference in how the spectacle lens looks when viewed by a third party from the object-side surface when worn in the removed portion A and the non-removed portion B. In the spectacle lens 1 according to this embodiment, a decorative portion is formed by utilizing the difference in how the removed portion A and the non-removed portion B look when viewed by a third party. In other words, a decorative portion with desired letters, symbols, designs, etc. is formed on the surface of the spectacle lens by forming a removed portion A on a spectacle lens having an optical interference layer with a laminated structure in which low-refractive-index layers and high-refractive-index layers are laminated, where at least a portion of the low-refractive-index layer or the high-refractive-index layer of the optical interference layer is absent.

[0080] At least one of the surfaces of the eyeglass lens on which the optical interference layer is provided (for example, the surface facing the eyeball, the same applies hereinafter) has a first region and a second region. The first region and the second region are collectively referred to as "multiple regions." The multiple regions may also include regions equivalent to the first region or the second region, such as a third region, a fourth region, a fifth region, etc., which will be described later as variations.

[0081] The first region is a region in which removed portions, where at least one layer of the optical interference layer has been locally removed, are arranged with a first regularity, and non-removed portions, where the layer has not been removed, exist between the removed portions.

[0082] As used herein, "regularity" refers to the arrangement of removed portions in at least one predetermined direction (e.g., the X direction and / or the Y direction) in accordance with a certain rule, as shown in FIGS. 1 to 4 and 12. An example of this rule is the arrangement of removed portions repeatedly at a certain cycle in the one direction. For example, in the XY lattice of FIG. 12, when viewed in the X direction, the intersections of the XY lattice are labeled 1, 2, 3, and 4, and the rule is that a removed portion is arranged at intersection 1, no removed portion is arranged at intersection 2, no removed portion is arranged at intersection 3, and no removed portion is arranged at intersection 4. Of course, the rule may also be that a removed portion is arranged at intersection 1, a removed portion is arranged at intersection 2, no removed portion is arranged at intersection 3, and no removed portion is arranged at intersection 4.

[0083] It should be noted that this "repetition" is used in a broad sense, and may include, for example, a case where the distances between the centers of adjacent removed portions do not strictly match but the removed portions are arranged in the same pattern in one direction with non-removed portions present between them.

[0084] In this specification, the "removed portion" is also referred to as a "dot" and, when irradiated with a laser, as a "spot." It refers to a portion with the same shape as one processing spot per pulse. Overlapping removed portions in a planar view are also referred to as a connected body.

[0085] The "center-to-center distance of removed portions" refers to the distance between the centers of gravity of adjacent removed portions (dots, spots) in a planar view. This center-to-center distance is also referred to as the "pitch" in this specification. If the shape of the removed portions in a planar view is a perfect circle or ellipse, the "center-to-center distance of removed portions" refers to the center-to-center distance, as the name suggests.

[0086] The first regularity preferably includes a regularity regarding the center-to-center distance between the removed portions in one direction G in the first region. The second regularity preferably includes a regularity regarding the center-to-center distance between the removed portions in one direction G in the second region. It is preferable that the two patterns are different from each other. On the other hand, as described above, although the center-to-center distances of adjacent removed portions do not strictly match, they may be arranged in a similar pattern in one direction, and instead be arranged in a different pattern in another direction. For example, in Figure 12 shown below, regions (2) and (3) have the same pattern in the X direction but different patterns in the Y direction. Therefore, this embodiment is not limited to the first and second patterns being different from each other in a predetermined direction. In any case, regardless of the rule regarding the center-to-center distance, if the first regularity and the second regularity differ in some way, the first region and the second region will be visually recognized as regions with different color tones.

[0087] There are two main cases where "non-removed portions exist between the removed portions." One is the case where the removed part A surrounds the non-removed part B, as in region x1 in Figure 1. In this case, when region x1 is recognized as a sea-island structure, the non-removed part B becomes an island and the removed part A becomes a sea. The other case is when the non-removed part B surrounds the removed part A, as in region x2 in Figure 1. In this case, when region x1 is recognized as a sea-island structure, the removed part A becomes an island and the non-removed part B becomes the sea. Both cases are collectively referred to in this specification as "non-removed portions existing between the removed portions."

[0088] The second region is one of the following: (1) A region in which the removed portions are arranged with a second regularity (2) Region consisting of unremoved parts

[0089] (1) means that the second region has removed portions. In this case, the second regularity is not limited as long as it differs from the first regularity in one or more respects (for example, the center-to-center distance, the arrangement pattern of the removed portions, etc.). Otherwise, the explanation of the first regularity above can be applied. In this specification, the arrangement pattern of the removed portions is also referred to as the removed pattern, or simply as the pattern.

[0090] In (1), the non-removed portions do not necessarily have to be present between the removed portions. That is, the second region may be entirely removed without leaving any non-removed portions. This entirely removed portion is also referred to as a "solid pattern" in this specification.

[0091] (2) means that the second region does not have a removed portion. In the case of (2), when a viewer views the eyeglass lens, they see the mixed color (e.g., light blue) tone γ described in [Means for Solving the Problems of the Invention] and the color of light resulting from reflected light B' from the non-removed portion B (e.g., blue, tone β in the case of a blue-cut lens). Even if the viewer does not see the color of light resulting from reflected light A' from the removed portion A (e.g., a metallic color close to gold, tone α), they can see the tones β and γ.

[0092] Prior to the filing of this application, it was not known that a color tone γ is exhibited in an eyeglass lens in which a localized partial removal of an optical interference layer is employed. Furthermore, even when considering the first region alone that produces the color tone γ, there is a high degree of freedom in changing the color tone γ by changing the regularity of the arrangement of the removed portions A. This freedom of change will be described later, but it is a significant freedom along with the freedom of decoration (decoration) referred to in this specification.

[0093] Therefore, even in the case of (2), the effect of the present invention remains the same: a spectacle lens employing localized partial removal of the optical interference layer can provide greater color variation than conventional lenses. The same can be said for the solid pattern case of (1) above, where a spectacle lens employing localized partial removal of the optical interference layer can provide greater color variation than conventional lenses. In light of the content of this paragraph, the technical concept of the present invention is also reflected in spectacle lenses that define only the first region. Therefore, the spectacle lens and its related technology can also be considered an invention.

[0094] By employing the above configuration, the first area and the second area are visually recognized as areas with different color tones.

[0095] In this specification, "color tone" primarily refers to the appearance of a color, including its brightness and darkness, the shade of color, the brightness and darkness due to the intensity (difference) of reflected light, or the intensity of brilliance. A difference in color tone refers to the perception of any of these differences by a viewer with normal vision. Furthermore, a change in hue due to differences in the removal area rate is also included in the term "change in color tone." Changes in color tone include changes in appearance due to changes in lightness, hue, and saturation, as expressed in the L*a*b* color space. For information on the L*a*b* color space, see pages 50-52 of the Official Textbook for the Color Certification Examination, Level 1, sponsored by the Ministry of Education, Culture, Sports, Science and Technology (First Edition, Third Printing, February 14, 2022, Cabinet Office-Certified Public Interest Incorporated Association).

[0096] In this specification, "how a third party (observer) sees the spectacle lens when worn from the object side" includes how a third party sees when the third party's eyes receive light reflected from the spectacle lens when worn. Specifically, this refers to how a light source (sunlight, illumination, etc.) in the wearer's environment sees when it is incident on the decorative part of the spectacle lens when worn, and the reflected light due to specular reflection sees when the third party's eyes are positioned so that the light can be incident on the eyes of the third party.

[0097] <Color variations> This embodiment can further increase the variation in color tones. For example, by utilizing the high degree of freedom in changing the color tone γ as described above, the regularity of the arrangement of the removed portions A may be changed to change the mixed color from, for example, light blue.

[0098] The arrangement of the removed portions A may be regular in the X and Y directions, or may have different regularities in both directions (for example, FIG. 12).

[0099] 12 is a schematic diagram of a spectacle lens according to an embodiment, viewed from above, showing removal portions arranged with various regularities, with dashed lines indicating area units and an XY lattice as a virtual line. The XY lattice will be described later. The white arrows indicate that the removal portions are arranged with varying regularity from the area at the base of the white arrow to the area at the tip of the arrow. This figure shows an example in which both areas are formed on the surface, a common XY lattice is used for the first and second areas, and each removal portion includes only one intersection of the XY lattice.

[0100] Thus, regularity is an important element in the technical concept of the present invention. That is, the arrangement pattern of the multiple removed portions follows a predetermined rule (regardless of whether the pitch is constant or non-constant), and the color tone of the region can be controlled depending on that rule. One specific example of this rule is an XY grid, as shown in Figure 12.

[0101] As described above, it is possible to form areas that can produce various color tones on one surface of the spectacle lens, as shown in Fig. 12. The decorative portions may be provided on both surfaces of the spectacle lens.

[0102] Furthermore, as shown in Figure 12, the region consisting of the non-removed portion (region outside the dashed line) may also be added to the variation of color tone. The second region may also include the region consisting of the non-removed portion.

[0103] <Specific example and modified example of the configuration of eyeglass lenses> In the eyeglass lens 1, the decorative portion includes a plurality of regions in which, in a plan view of the optical interference layer, removal patterns formed by the removal portions A are different from one another. These regions correspond to the regions x1 and x2 in Fig. 1 and to the regions x31, x32, and x33 in Fig. 2. In each of the plurality of regions, a removal portion A is formed that forms an arbitrary removal pattern in a plan view of the optical interference layer.

[0104] In both Figure 1 and Figure 2, the color tone of each area (x1, x2, x31, x32, x33) is uniform.

[0105] In this specification, the removal pattern formed by the removed portion A is a pattern formed within the plane of the optical interference layer.

[0106] The pattern formed by the removed portions A can be different in each of the multiple regions. That is, the multiple regions can include a first region in which the removed portions A are formed in a pattern arranged with a first regularity, and another region in which the removed portions A are formed and arranged in a removal pattern different from the first removal pattern. In the other region, the removed portions A may be formed in a pattern arranged with a different regularity different from the first regularity. The multiple regions may be in contact with each other as shown in FIG. 2, or may be separated by a considerable distance as shown in FIG. 1. When the regions are in contact with each other, the boundaries at which the pattern changes correspond to the boundaries of the regions.

[0107] There are no limitations on the manner in which the regions contact each other, and for example, a first region may be surrounded by a second region, or there may be multiple surrounded second regions. Conversely, a second region may be surrounded by a first region, or there may be multiple surrounded first regions. This relationship can also be applied to the following third, fourth, fifth, etc. regions that are equivalent to the first or second region.

[0108] A third region, fourth region, fifth region, etc., which are regions equivalent to the first region or the second region, may be provided. In the third region, the removed portions are arranged with a third regularity, in the fourth region, the removed portions are arranged with a fourth regularity, and in the third region, the removed portions are arranged with a fifth regularity. The first to fifth regularities are different from one another. The eyeglass lens according to this embodiment preferably includes the third region in addition to the first and second regions, preferably further includes the fourth region, and preferably further includes the fifth region.

[0109] The removal pattern formed by the removal unit A is arranged with a predetermined regularity. This pattern may be composed of units having a predetermined shape, or may be formed by regularly arranging units having a predetermined shape. An example of this predetermined shape is a dot (point) shape. The shape of the dot is not particularly limited, and its specific shape may be a circle, ellipse, triangle, square, pentagon, hexagon, or other polygon, or any other shape. For convenience of explanation, this specification illustrates a case where the dot shape, i.e., the laser processing shape (spot), is circular.

[0110] <Removal area rate and other> Hereinafter, the present embodiment will be described focusing on the removal area ratio, which is the ratio of the area occupied by the removed portion in one region. Note that the content described in this section can of course be combined with other descriptions in this specification.

[0111] The size of one region is defined to obtain the removal area ratio. Take region x33 in Figure 2 as an example. As shown in region x33, the size of one region may be the total area of the removal portions (dots) at both ends in the X direction and the portion sandwiched between the dots where a predetermined pattern is repeatedly arranged. The size of one region may also be the total area of the removal portions (dots) at both ends in the Y direction and the portion sandwiched between the dots where a predetermined pattern is repeatedly arranged.

[0112] In region x31 in Figure 2, the repeating pattern ends midway when viewed in the +X direction (rightward). In this case, the region x31 may be considered to extend partway (for example, the boundary between regions x31 and x32 in Figure 2). Conversely, if the repeating pattern does not appear even at the original pitch when viewed in one direction, the removed portion (dot) closest to the one direction may be considered the end (for example, the left end of region x31). The content described in this paragraph is also applicable in the Y direction.

[0113] One aspect of this embodiment is a spectacle lens having an object-side surface and an eyeball-side surface, A lens substrate; an optical interference layer having a laminated structure on either surface of the lens substrate, At least one layer of the optical interference layer has a visible decorative portion formed by locally removing the layer, the decorative portion has a plurality of regions in which the removed optical interference layer has different removal area ratios in a plan view, the plurality of regions includes a first region having a removal pattern in which the removal portions are arranged with a first regularity, with the minimum unit being a removal portion having a dimension of 200 μm or less, and The plurality of regions are visually recognized as regions having different color tones from one another. Regarding eyeglass lenses. According to this embodiment, a spectacle lens with a high degree of freedom in decoration can be obtained.

[0114] In the eyeglass lens according to one aspect of the present embodiment, the decorative portion includes a plurality of regions, each of which has a removed portion where at least one layer of the laminate structure of the optical interference layer has been removed, and at least one of the plurality of regions has a removed pattern (referred to as a first region) where the removed portions, each having a minimum dimension of 200 μm or less, are arranged with a predetermined regularity (referred to as a first regularity).

[0115] In this specification, the "smallest unit of repetition of removed portions" (also referred to as the "smallest unit of removed portions" or simply the "smallest unit") refers to one dot when the removed portions (dots) are not connected to each other (for example, (d) in Figure 13). One dot, i.e., one processing spot in one pulse, is also the smallest unit of processing and the smallest unit of drawing data. When removed portions (dots) are connected to each other and the connected bodies are repeatedly arranged in the X and / or Y directions with non-removed portions sandwiched between them (for example, (a)-(c) in Figure 13), the "smallest unit of removed portions" in this specification refers to the connected bodies. This applies, for example, to a case where one pixel, which is the smallest unit of image data, is made up of multiple dots (details will be described later). In this case, for example, the connected bodies are repeatedly arranged in the X and / or Y directions. Note that the area enclosed by the dashed line in the lower right of Figure 12 (shown below as (5) in the figure) contains two types of smallest units (one dot and a connected body of two dots), and regularity is achieved by combining the two types of smallest units. If all the removed parts (dots) in one area are connected, the "smallest unit" refers to one dot.

[0116] In the first region, even if all the removed portions (dots) are connected to each other, there will be non-removed portions between the dots. On the other hand, in the second region, there may be no non-removed portions between the dots (so-called solid patterns). In all cases described in this paragraph, the smallest unit is one dot.

[0117] The minimum unit may be synonymous with the repeating unit in the regularity, or may not be synonymous with the repeating unit in the regularity, as shown in the area (5) enclosed by the dashed line in the lower right of Figure 12 below.

[0118] Furthermore, the plurality of regions includes a region (referred to as a second region) that is different from the first region, and the second region has a removal area ratio that is different from the removal area ratio of the first region. That is, the removal area ratio is different for each of the plurality of regions. As will be described in detail later, in this embodiment, the visibility of each region is controlled by adjusting the removal area ratio for each region, and the regions can be perceived as different color tones. Furthermore, in at least one region of the plurality of regions (e.g., the first region), the minimum unit is a removal portion of 200 μm or less, which is close to the resolution (resolution limit) of the human eye, and these removal portions are arranged in a predetermined regularity to form a removal pattern. This significantly increases the degree of freedom in decorating eyeglass lenses, allowing desired designs to be achieved.

[0119] Here, the inventor has discovered that in such removal, by adjusting the removal area ratio (hereinafter also referred to as "removal area ratio") in the region of the removed portion in a planar view of the optical interference layer, it is possible to express multiple regions that are distinguishable with the naked eye when viewed as a decorative portion including such removed portion, and to express color shades, light and dark, and gradational intermediate tones (hereinafter also referred to as intermediate color tones), or gradations.

[0120] In this embodiment, by adjusting the removal area ratio for each region, the visibility in each region can be controlled and they can be recognized as different color tones. Furthermore, in at least one region (for example, the first region) of the multiple regions, the minimum unit of removal portions is 200 μm or less, which is close to the resolution (resolution limit) of the human eye, and by forming a removal pattern consisting of these removed portions arranged in a predetermined regularity, the degree of freedom in decorating the eyeglass lens is greatly improved and desired designs can be applied.

[0121] In this specification, the phrase "the pattern of the removed portion A is configured with a minimum unit size of 200 μm or less" means that the shortest length of the representative lengths of the figures constituting the removed portion A is 200 μm or less. The representative length of a figure is a length used to define the dimensions of the figure, such as the diameter for a circle, the lengths of the major and minor axes for an ellipse, the length of the diagonal for a polygon, and the length and width of a line for a straight line. The minimum unit of the pattern of the removed portion A may correspond to the resolution of the image data and the minimum unit capable of processing the removed portion A in the eyeglass lens manufacturing method described below. For example, when the removed portion A is formed by laser processing, the minimum unit is preferably an approximately circular shape, and the laser spot diameter may correspond to the size of the minimum unit of the pattern of the removed portion A. The above definition of "the length of the shortest part is 200 μm or less" is based on the following considerations. If either the X or Y dimension is 200 μm or less, the removed part is small enough to be close to the resolution limit of the human eye. If the length of the longest part is on the order of millimeters, it may be possible to see the removed part as a single part, but if the removed part is too thin, it will not be visible as a single part. In either case, it is highly likely that the color of the removed part as a single part cannot be distinguished. On the other hand, if many removed parts are arranged in a regular pattern, the color tone of the surface can be seen. Note that instead of "the length of the shortest part is 200 μm or less," it is also possible to adopt the rule that "the length (maximum width) of the longest part is 200 μm or less." This ensures that the removed parts alone are not discernible to the human eye, while if many removed parts are arranged regularly, the color tone of the surface is visible. The "200 μm or less" in this paragraph can also be "100 μm or less" or "70 μm or less."

[0122] In the eyeglass lens of this embodiment, the decorative portion may include a plurality of regions, each having a removal pattern formed by removed portions, and at least two regions having different color tones and being visually distinguishable may be formed by changing the removal area ratio in the removal pattern for each region. As will be described in detail later, in this way, the visibility of each region is controlled by adjusting the removal area ratio for each region, and by forming at least two regions having different color tones that are visually distinguishable, the degree of freedom in decoration of the eyeglass lens is improved.

[0123] When the removed portions are arranged with a second regularity in the second region, i.e., when the second region is not composed only of non-removed portions, it is preferable to make the arrangement of the removed portions different between the first region and the second region. "Arrangement" refers to the arrangement pattern of the centers of the removed portions when comparing the first region and the second region.

[0124] The pattern formed by the removed portions A can be formed into a stripe pattern, a lattice pattern, or a combination thereof by arranging the dot-shaped removed portions, and there are no restrictions on the arrangement. It is sufficient that the removed portions A are arranged with some regularity.

[0125] For example, the plurality of regions may include a second region in which the removed portions A are arranged without gaps, resulting in a removed area ratio of 100%.

[0126] From the viewpoint of facilitating adjustment of the removal area ratio described below, it is preferable that the pattern of the removed portions A be composed of a plurality of dots and / or a plurality of straight lines. Incidentally, even in a pattern in which a predetermined area is entirely made up of removed portions A and no non-removed portions B exist, it can be said that the pattern is composed of a plurality of dots and / or a plurality of straight lines arranged without gaps. Even in this case, the pattern is obtained by arranging the minimum unit of removed portions A, each consisting of one pixel, with a predetermined regularity. Furthermore, the minimum unit can be determined from the intermediate tone pattern. The pattern of removed portions A can be viewed by magnifying it using a microscope or the like.

[0127] For example, in the enlarged view shown at the bottom of Figure 1, in regions x1 and x2, removal section A is configured with circular dots as constituent units. The dot pitches are designed to be different in regions x1 and x2. In region x1, a pattern is formed in which each dot partially overlaps with its adjacent dot. In this specification, "adjacent" includes a state in which the removed portions are in contact with each other, with portions overlapping each other, and also includes a state in which the removed portions are not in contact with each other but are spaced apart by a distance small enough that when the removed portions are arranged in a predetermined regularity, they exhibit a color tone different from both the non-removed portion B and the solid pattern.

[0128] In addition, in the enlarged view shown at the bottom of Figure 2, decorative portion X3 includes adjacent regions x31, x32, and x33, each with a different pattern of removed portion A. Regions x31, x32, and x33 are designed to have different dot pitches. Region x33 has a pattern in which each dot partially overlaps with its neighboring dots.

[0129] As mentioned above, the removed portion A and the non-removed portion B have different optical properties (for example, reflectivity), which results in a difference in how the eyeglass lens looks when viewed by a third party from the object side while being worn. However, if decoration is performed simply by forming the removed portion A, a two-tone design is created, with a decorated area consisting only of the removed portion A and an undecorated area consisting only of the non-removed portion B.

[0130] On the other hand, in this embodiment, by setting the size of the removed portion A to a minimum unit of 200 μm or less and arranging the removed portions A of that size according to a predetermined regularity, it becomes possible to distinguish intermediate tone regions that have a color tone that differs from regions that are made up only of removed portions A and from regions that are made up only of non-removed portions B. This allows for greater freedom in decoration of eyeglass lenses in this embodiment.

[0131] The size of the smallest unit of the pattern of the removed portion A (a dot as a specific example) is, for example, preferably 3 μm or more and 180 μm or less, more preferably 5 μm or more and 150 μm or less, even more preferably 10 μm or more and 120 μm or less, even more preferably 15 μm or more and 100 μm or less, and particularly preferably 20 μm or more and 80 μm or less. Within the above range, the size of the smallest unit of the pattern of the removed portion A may be 60 μm or less, 50 μm or less, or 40 μm or less. By setting the size of the smallest unit within the above range, more natural halftones tend to be formed. Furthermore, the pattern of the removed portion A can be formed more easily, and eyeglass lenses with high productivity tend to be provided. This minimum size can be determined by the pixel size in the image data.

[0132] Furthermore, the eyeglass lens according to this embodiment has a plurality of regions in which the pattern of the removed portions A has different area ratios (removed area ratios) occupied by the removed portions A. In this way, by changing the area ratio occupied by the removed portions A in the pattern of the removed portions A for each region, it is possible to change the proportion of the removed portions A and the non-removed portions B present in each region. Therefore, by adjusting the removed area ratio, it is possible to control the appearance of each region. For example, by gradually increasing the removed area ratio from 0% to 100%, it is possible to gradually transition the appearance of the decorative portion from an area consisting only of the non-removed portions B to an area consisting only of the removed portions A. As a result, it is possible to increase the degree of freedom in decoration of the decorative portion.

[0133] In this specification, the removed area ratio is the area ratio of the total removed portions A in a plan view of the optical interference layer in a predetermined region. A can be defined for each region with a certain pattern, and the area occupied by the removed part A in each region is defined as S A The area occupied by the non-removed part B is S B When the removal area ratio is A is defined as the ratio of the area occupied by the removed portion A to the total area of each region. P A =SA / (S A +S B )

[0134] In each of the multiple regions constituting the decorative portion, the removal area ratio of the pattern of the removed portion A is not particularly limited and may be greater than 0% and less than 100%. Within this range, the removal area ratio may be, for example, 5% or more, 10% or more, 20% or more, 30% or more, 40% or more, 50% or more, 60% or more, 70% or more, or 80% or more, or 99% or less, 98% or less, 95% or less, 90% or less, 85% or less, 80% or less, 70% or less, 60% or less, or 50% or less. The removal area ratio may be within a range defined by any of the upper and lower limits described above, for example, 5% or more and less than 99%, 10% or more and less than 95%, or 20% or more and less than 90%.

[0135] The removal area ratios of the patterns of the removed portions A in each region may differ from one another, but the difference is not particularly limited. The difference in the removal area ratios between the regions is preferably 1% to 98%, more preferably 2% to 95%, even more preferably 3% to 90%, even more preferably 5% to 85%, and particularly preferably 10% to 80%. The difference in the removal area ratios between the regions may be 20% or more or 70% or less within the above range. Furthermore, among multiple regions, the difference in the removal area ratios between the region with the highest removal area ratio and the region with the lowest removal area ratio is not particularly limited, but is preferably 10% to 99%, more preferably 15% to 95%, and even more preferably 20% to 90%. By keeping the difference in the removal area ratios of the patterns of the removed portions A in each region within the above range, the differences in the appearance of each region can be more clearly seen.

[0136] Generally, the higher the removal area ratio, the higher the visibility of the decorative part. Specifically, this is because the amount of reflected light generated in the removed part A increases. The color tone of the reflected light tends to be brighter, darker, or more shining.

[0137] In each of the multiple regions constituting the decorative portion, the removal area ratio can be adjusted by appropriately designing the pattern of the removal area A. Figure 3 shows a schematic diagram of the pattern of the removal area A formed by dots. In Figure 3, (a) is an example of a pattern with intermediate tones, and (b) is an example of a solid pattern. For example, when the pattern of the removal area A is composed of dots, the removal area ratio can be adjusted by adjusting the dot density. In particular, when the dots are arranged regularly, the removal area ratio can be adjusted by adjusting the distance between the dots (the distance between the centers of gravity of the nearest dots, hereinafter also referred to as "pitch"), or by setting the distance between the dots to a distance that allows a solid pattern to be formed and then thinning out dots from the solid pattern.

[0138] Regarding "thinning out," in the case described in the above paragraph, for example, the laser irradiation points in the first region may be arranged in a manner in which some of the laser irradiation points in the second region are thinned out (for example, region x1 → region x2 in FIG. 1). As a result, in a plan view of the eyeglass lens, the removed portions in the first region may be arranged in accordance with the first regularity by thinning out some of the removed portions in the second region. This "before and after thinning out" is included in the change of the "arrangement mode" mentioned above.

[0139] Furthermore, when the pattern of the removed portion A is made up of straight lines, the removal area ratio can be adjusted by adjusting the distance between the substantially parallel straight lines.

[0140] Furthermore, when the removed portion A is formed by laser processing, the smallest unit is preferably a circle, as shown in Fig. 4, and the laser spot diameter can correspond to the size of the smallest unit of the pattern of the removed portion A. Fig. 4 is an observation image of the removed portion A formed by laser processing, in which the circular dots correspond to the removed portion A and the area around the dots corresponds to the non-removed portion B.

[0141] Fig. 5 shows an example of a pattern sample of the removed portion A formed by dots. In Fig. 5, the pattern of the removed portion A may be changed from a high area removal rate (a) to an intermediate area removal rate (b) to a low area removal rate (c).

[0142] In Figures 1 and 2, the removal area ratio of the removal portion A is adjusted by adjusting the dot density. In Figure 1, the removal area ratio of region x1 is made higher than that of region x2, so that the decorative portions X1 and X2 look different. Specifically, the decorative portion X1 is given a decoration with a darker reflective color, a higher amount of reflected light, or a stronger shine. In Figure 2, the removal area ratios of regions x31, x32, and x33 that make up the decorative portion X3 are gradually increased in this order, so that the decorative portion X3 is given a decoration with a gradation.

[0143] In the spectacle lens according to another aspect of the present embodiment, as long as the multiple regions are configured so that each region can be visually identified as a region with a different color tone, the pattern of the removed portions A does not necessarily need to be configured with a minimum unit size of 200 μm or less. For example, depending on the design of the pattern of the removed portions A, even if the minimum unit of the pattern of the removed portions A exceeds 200 μm, it is possible to achieve an intermediate appearance between a region made up of only the removed portions A and a region made up of only the non-removed portions B.

[0144] Therefore, in the eyeglass lens according to another aspect of the present embodiment, the plurality of regions may include at least a first region and another region different from the first region, and may be configured so that the decoration corresponding to the first region and the decoration corresponding to the other region are visually distinguishable. Note that the difference in appearance between the decorative portion corresponding to the first region and the decorative portion corresponding to the other region arises from the difference in the removal area ratio in each region.

[0145] In this specification, "visual recognition" in the context of "the decorative portion corresponding to the first region and the decorative portion corresponding to the other regions can be visually distinguished" means that the decorative portion can be recognized by the eyes of a third party looking at the eyeglass lens when it is being worn, when the reflected light generated in the first and second regions enters the eyes of the third party. Here, when multiple regions with different removal area ratios come into contact with each other, even if the boundary cannot be clearly recognized, "visual recognition" is possible if the multiple color tones originating from the multiple regions can be recognized.

[0146] As shown in FIGS. 1 and 2 , the spectacle lens 1 according to this embodiment has a decorative portion formed by removing at least one layer of the laminated structure of the optical interference layer, thereby enabling the visible light reflectance of the removed portion to be higher than that of the non-removed portion. Therefore, when viewing such a decorated lens, the reflected light enters the eye, making the decorative portion visible. Since the removed portion has sufficient smoothness, specular reflection is dominant in the reflection of light incident on the removed portion. Meanwhile, specular reflection from the removed portion is unlikely to enter the eyes of a person wearing the eyeglasses, making the decorative portion virtually invisible to the wearer. Furthermore, since the removed portion has high transmittance, the wearer can clearly view the outside world with a sufficient field of view, just like with ordinary spectacle lenses. In other words, the eyeglasses do not obstruct the wearer's field of vision, and the eyeglasses function is fully maintained.

[0147] 1 and 2, the decorative portions X1 to X3 may be present within the eyeglass frame shape line 2. In the eyeglass lens 1, a design pattern can be formed within the eyeglass frame shape line, creating new designs not found in conventional eyeglasses. From the same perspective, the decorative portions may be present within an area with a radius of 30 mm from the center of the lens.

[0148] The decorative portion, which will be described later, can be formed by laser irradiation, but the decorative portion may be formed on either the object-side or the eyeglass-side side of the eyeglass lens. It is preferable that the decorative portion be visible from either side. This is useful because it allows a person wearing eyeglasses to check the decoration of their eyeglasses. However, as mentioned above, the decorative portion is not visible to the person wearing the eyeglasses, and does not obstruct their field of vision.

[0149] In the eyeglass lens according to this embodiment, the decorative portion may occupy an area of 5% to 99% of the entire eyeglass lens in a plan view. In other words, since the eyeglass wearer's field of vision is unlikely to be obstructed, problems with wearing the eyeglass lens are unlikely to occur even if the decorative portion occupies a large area relative to the entire eyeglass lens.

[0150] <More specific examples of eyeglass lens configurations> The spectacle lens according to this embodiment includes a lens substrate and an optical interference layer. The spectacle lens according to this embodiment may also include at least one layer selected from the group consisting of a hard coat layer, an undercoat layer, and a water-repellent layer.

[0151] 5 is a schematic cross-sectional view of a spectacle lens 1 according to this embodiment. The spectacle lens 1 according to this embodiment includes a lens substrate 11, a hard coat layer 12f provided on the object-side surface 11a of the lens substrate 11, an optical interference layer 13f provided on the object-side surface 12fa of the hard coat layer 12f, and a water-repellent layer 14f provided on the object-side surface 13fa of the optical interference layer 13f.

[0152] Furthermore, when the lens substrate 11 is a finished lens (a lens on which both optical surfaces are formed), the eyeglass lens 1 of this embodiment further comprises a hard coat layer 12b provided on the eyeball-side surface 11b of the lens substrate 11, an optical interference layer 13b provided on the eyeball-side surface 12bb of this hard coat layer 12b, and a water-repellent layer 14b provided on the eyeball-side surface 13bb of this optical interference layer 13b. The eyeglass lens 1 also has a removed portion A on the eyeball-side or object-side surface (the eyeball side in FIG. 5 ) where at least a part of the optical interference layer has been removed.

[0153] Although not shown, an underlayer may be provided between the lens substrate 11 and the hard coat layer 12f, or between the lens substrate 11 and the hard coat layer 12b.

[0154] (lens substrate) Examples of resins for the lens substrate include urethane resins, episulfide resins, polycarbonate resins, and acrylic resins.

[0155] The surface shape of the lens substrate is not particularly limited and may be flat, convex, concave, etc. The lens substrate may be used for any of a single-vision lens, a multifocal lens, a progressive-power lens, etc. For example, in a progressive-power lens, the near-vision region (near vision region) and the progressive-power region (intermediate region) are usually included in the lower region, and the distance-vision region (distance vision region) is included in the upper region.

[0156] The optical center thickness of the lens substrate is not particularly limited, but is preferably 0.5 mm or more and 10.0 mm or less, more preferably 0.5 mm or more and 5.0 mm or less, even more preferably 0.5 mm or more and 3.0 mm or less, and even more preferably 0.5 mm or more and 2.0 mm or less. The diameter of the lens substrate is not particularly limited, but is usually about 50 to 100 mm.

[0157] The refractive index ne of the lens substrate is preferably 1.52 or more, more preferably 1.53 or more, even more preferably 1.55 or more, even more preferably 1.58 or more, and even more preferably 1.60 or more. From the viewpoint of enhancing the effect of improving the Abbe number by including Compound 1, the refractive index ne of the lens substrate is preferably 1.70 or more, and more preferably 1.74 or more. The upper limit of the refractive index ne of the lens substrate is not particularly limited, but may be, for example, 1.80 or less.

[0158] (Hard coat layer) The eyeglass lens according to this embodiment may further include a hard coat layer to prevent scratches on the eyeglass lens. The hard coat layer is, for example, a cured film made of a curable composition containing an inorganic oxide and a silicon compound. The curable composition may further include a polyfunctional epoxy compound.

[0159] Examples of inorganic oxides include silicon oxide, aluminum oxide, titanium oxide, zirconium oxide, tungsten oxide, zinc oxide, tin oxide, beryllium oxide, antimony oxide, and composite oxides of two or more of these inorganic oxides. These may be used alone or in combination of two or more. Among these inorganic oxides, silicon oxide is preferred. Colloidal silica may also be used as the inorganic oxide.

[0160] The content of the inorganic oxide is preferably 20% by mass or more and 80% by mass or less, more preferably 25% by mass or more and 70% by mass or less, and even more preferably 25% by mass or more and 50% by mass or less, based on the solid content of the curable composition.

[0161] The silicon compound is, for example, a silicon compound having a hydrolyzable group such as an alkoxy group.The silicon compound is preferably a silane coupling agent having an organic group bonded to a silicon atom and a hydrolyzable group.The organic group bonded to a silicon atom is preferably an organic group having a functional group such as an epoxy group such as a glycidoxy group, a vinyl group, a methacryloxy group, an acryloxy group, a mercapto group, an amino group, or a phenyl group, and more preferably an organic group having an epoxy group.In addition, the silicon compound may have an alkyl group bonded to silicon.

[0162] The hard coat layer can be formed by applying a curable composition to a substrate and then subjecting it to a curing treatment (thermal curing, photocuring, etc.). Commonly used methods such as dipping, spin coating, and spraying can be used to apply the curable composition. For curable compositions containing polyfunctional epoxy compounds, the curing treatment is usually carried out by heating. The heat curing treatment can be carried out, for example, by placing the lens coated with the curable composition in an environment with an ambient temperature of 50 to 150°C for about 30 minutes to 3 hours.

[0163] (base layer) The underlayer can be formed from, for example, an aqueous resin composition containing at least one type of resin particles selected from the group consisting of polyurethane resin, acrylic resin, and epoxy resin.

[0164] As the aqueous resin composition, commercially available aqueous polyurethanes can be used as they are, or diluted with an aqueous solvent as necessary. Examples of commercially available aqueous polyurethanes include the "Evaphanol" series manufactured by Nicca Chemical Co., Ltd., the "Superflex" series manufactured by Daiichi Kogyo Seiyaku Co., Ltd., the "Adeka Bontiter" series manufactured by ADEKA Corporation, the "Olestar" series manufactured by Mitsui Chemicals, Inc., the "Bondic" series and the "Hydran" series manufactured by Dainippon Ink and Chemicals, Inc., the "Impranil" series manufactured by Bayer, the "Sofranate" series manufactured by Nippon Soflan Co., Ltd., the "Poise" series manufactured by Kao Corporation, the "Sunprene" series manufactured by Sanyo Chemical Industries, Ltd., the "Eizelax" series manufactured by Hodogaya Chemical Co., Ltd., and the "Neolet's" series manufactured by Zeneca Corporation.

[0165] The underlayer can be formed, for example, by applying the above-mentioned aqueous resin composition to the surface of the substrate and drying it.

[0166] (optical interference layer) The optical interference layer has a laminated structure. The optical interference layer is, for example, an antireflection film with a multilayer structure in which a low refractive index layer and a high refractive index layer are laminated, and the removed portion is obtained by partially removing the low refractive index layer, which is the outermost layer of the multilayer structure. As a result, the high refractive index layer may be exposed in the removed portion. The antireflection layer preferably has 4 to 11 layers, more preferably 5 to 10 layers, and even more preferably 7 to 9 layers. However, the present invention is not limited to this preferred example. For example, a laminated structure of Cr and SnO2 may be employed, as described in Example 1 of Patent Document 1.

[0167] The refractive index of the low refractive index layer is preferably 1.35 to 1.80, more preferably 1.45 to 1.50 at a wavelength of 500 to 550 nm. The low refractive index layer is made of an inorganic oxide, preferably silicon oxide.

[0168] The refractive index of the high refractive index layer is preferably 1.90 to 2.60, more preferably 2.00 to 2.40, at a wavelength of 500 to 550 nm. The high refractive index layer is made of, for example, an inorganic oxide. The inorganic oxide used in the high refractive index layer is preferably at least one selected from the group consisting of zirconium oxide, tin oxide (SnO2), indium tin oxide (ITO), tantalum oxide, yttrium oxide, titanium oxide, niobium oxide, and aluminum oxide, more preferably at least one selected from the group consisting of zirconium oxide and tantalum oxide.

[0169] At least one of the high refractive index layers constituting the optical interference layer is preferably made of a conductive material such as tin oxide (SnO2), indium tin oxide (ITO), etc. The use of a conductive material can impart antistatic properties to the eyeglass lens.

[0170] The optical interference layer may have a metal layer. The metal layer refers to a layer having a metallic color. Materials used for the metal layer include, for example, metals, or at least one substance having a metallic color selected from metal oxides, nitrides, carbides, and nitrogen oxides. From the viewpoint of ease of availability, metals are preferred. Examples of metal species contained in the metal layer include at least one selected from Cr, Ta, Nb, Ti, and Zr. Furthermore, the provision of a metal layer also provides an antistatic effect. The optical interference layer may have one or more metal layers.

[0171] Examples of the configuration of the optical interference layer are shown in the table below, where "No." indicates the number of each layer given in the figure.

[0172] [Table 1]

[0173] The average reflectance in the visible light region (hereinafter also simply referred to as "average reflectance") can be adjusted by changing the thickness of each layer and the number of layers in the optical interference layer. The average reflectance of the optical interference layer can be adjusted by changing the thickness of each layer, the number of layers, etc., and the optimal thickness of each layer can be calculated, for example, using thin film calculation software "Essential Macleod" (manufactured by Thin Film Center Inc.).

[0174] The optical interference layer can be formed as an antireflection layer by alternately laminating low refractive index layers and high refractive index layers by vacuum deposition.

[0175] Fig. 6 is a front view of a spectacle lens according to this embodiment. As shown in Fig. 6, the spectacle lens according to this embodiment has a removed portion A and a non-removed portion B in plan view of the optical interference layer.

[0176] FIG. 7 is a schematic cross-sectional view of a spectacle lens according to this embodiment. In FIG. 7, the optical interference layer 13f in FIG. 5 is composed of low-refractive-index layers 131a-d or high-refractive-index layers 132a-d. The schematic cross-sectional view of FIG. 7 is a drawing showing the x-x' cross section in FIG. 6. As shown in FIG. 7, the removed portion A is a region where at least a portion of the low-refractive-index layers 131a-d or high-refractive-index layers 132a-d of the optical interference layer is absent. The removed portion A is formed by removing at least a portion of the low-refractive-index layer or high-refractive-index layer of the optical interference layer. On the other hand, the unremoved portion B is a region where a portion of the low-refractive-index layer 131 or high-refractive-index layer 132 of the optical interference layer remains. The unremoved portion B is a region where the low-refractive-index layer and the high-refractive-index layer of the optical interference layer are not removed.

[0177] The optical interference layer of a spectacle lens is usually designed to reduce the amount of light reflected from the object-side surface, i.e., the amount of light incident on the object-side surface and reflected back to the object-side surface. Therefore, removing at least one layer of the laminated structure of the optical interference layer changes the reflectance (reflected light intensity) of the light reflected from the object-side surface, typically increasing the reflectance. That is, in the spectacle lens according to this embodiment, the removed portion A has a different reflectance in the visible light range compared to the non-removed portion B, typically a higher reflectance. Therefore, the decorative portion of the spectacle lens according to this embodiment can improve visibility to third parties. In this specification, the "visible light range" refers to a wavelength range of 380 nm to 780 nm. For example, the average reflectance of visible light in the removed portion A formed on one surface of the spectacle lens can be at least twice the average reflectance of visible light in the non-removed portion B. It is preferable that this characteristic be the same on both the formed side and the opposite side of the lens.

[0178] (water-repellent layer) The spectacle lens according to this embodiment may further include a water-repellent layer on the surface side of the optical interference layer. The water-repellent layer can be formed using a water-repellent material composition containing a fluorine-containing silane compound having a fluoroalkyl group. The water-repellent layer may be formed on either the hard coat layer or the optical interference layer, but is preferably formed on the antireflection layer. The water-repellent layer is preferably located on the outermost surface.

[0179] <Physical properties of eyeglass lenses> In this embodiment, the average reflectance R of the region formed by the non-removed portion B for the incident light from the object-side surface is B The average reflectance R of the area consisting of the removed part A A The ratio (R A / R B ) is preferably 1.5 or more, more preferably 2.0 or more, even more preferably 2.5 or more, and even more preferably 3.0 or more. A / R B ) is not particularly limited in its upper limit, but may be, for example, 6.0 or less. The above values are for when the spectacle lens is decorated on the spectacle-side surface. However, it is preferable that the values be in the same range even when the object-side surface is decorated.

[0180] Furthermore, depending on the layer structure of the optical interference layer, the spectacle lens may have a relatively high reflectance in a specific wavelength range, and a slight difference in hue may be perceived between the area formed by the removed portion A and other areas. Therefore, removing at least one layer of the laminate structure of the optical interference layer changes the spectrum of reflected light from the object-side surface, and any one of the hue, lightness, and saturation of the reflected light may change. That is, in the spectacle lens according to this embodiment, the removed portion A differs from the non-removed portion B in at least one of the hue, lightness, and saturation of the reflected light. Therefore, the decorative portion of the spectacle lens according to this embodiment can increase visibility to third parties.

[0181] In this embodiment, the wavelength at which the reflectance is highest in the reflection spectrum of the visible light region may be different between the region formed by the removed portion A and the region formed by the non-removed portion B.

[0182] In spectacle lenses, the layer structure of the optical interference layer usually tends to have a small effect on the transmittance (intensity of transmitted light) of light passing through the lens. Therefore, even in the spectacle lens according to this embodiment, even if at least one layer of the laminated structure of the optical interference layer is removed, the transmittance of the transmitted light is not significantly impaired.

[0183] In the eyeglass lens according to this embodiment, the luminous transmittance T B The luminous transmittance T of the removed part A A The ratio (T A / T B ×100) is preferably 80% or more, more preferably 83% or more, and even more preferably 85% or more. A / T B × 100), the upper limit is not particularly limited, but is, for example, 98% or less. A The value of T BBy keeping the luminous transmittance within the above range, the wearer will perceive all regions as transparent, and the difference in luminous transmittance will be barely perceptible, making it less likely to obstruct the wearer's field of vision.

[0184] Luminous transmittance can be measured by the method specified in JIS T 7333:2018 (ISO 8980-3:2013). Luminous transmittance is the transmittance at the optical center of the eyeglass lens and can be measured using a spectrophotometer. For example, the "U-4100" (trade name, manufactured by Hitachi, Ltd.) can be used as the spectrophotometer. This device is also used in the examples described below. Average reflectance can also be measured using this device.

[0185] In the spectacle lens according to this embodiment, the average reflectance R B is preferably 10% or less, more preferably 5% or less, and even more preferably 3% or less. B By designing the reflectance to be low, the removal area A is formed, and even if the increase in reflectance is slight, it becomes easier to see the difference from the non-removed area B, which forms the background of the decoration. B The average reflectance R may be 0.5% or more, 1.0% or more, or 1.5% or more. B may be 0.5% or more and 10% or less, 1.0% or more and 5% or less, or 1.5% or more and 3% or less.

[0186] The above average reflectance R A is the average reflectance R B It is preferably higher than 3%, more preferably 4% or more, even more preferably 5%, even more preferably 6% or more, even more preferably 7% or more, and particularly preferably 8% or more. A is the average reflectance R B By adjusting the design of the optical interference layer and ensuring the flatness of the processed surface of the removed portion A, the average reflectance R A The average reflectance R can be set within the above range. AThe upper limit of the average reflectance R is not particularly limited, but may be, for example, 20% or less, 18% or less, or 15% or less. A may be 4% or more and 20% or less, more than 5% and 18% or less, 6% or more and 15% or less, 7% or more and 15% or less, or 8% or more and 15% or less.

[0187] Above luminous transmittance T B is preferably 90% or more, more preferably 93% or more, even more preferably 95% or more, and even more preferably 97% or more. B By increasing the luminous transmittance T, the wearer's field of vision is less likely to be obstructed. B The upper limit of the percentage is not particularly limited, but is, for example, 99% or less.

[0188] Above luminous transmittance T A is preferably 80% or more, more preferably 82% or more. A By increasing the luminous transmittance T, the wearer's field of vision is less likely to be obstructed. A The upper limit of the luminous transmittance T is not particularly limited, but may be, for example, 95% or less, 90% or less, less than 90%, or 89% or less. A may be 80% or more and 95% or less, 82% or more and 90% or less, 82% or more but less than 90%, or 82% or more and 89% or less.

[0189] The luminous transmittance of the spectacle lens is preferably 70% or more, more preferably 80% or more, even more preferably 85% or more, and even more preferably 90% or more. The upper limit of the luminous transmittance is not particularly limited, but may be, for example, 100% or less, or 95% or less.

[0190] When the average reflectance and luminous transmittance satisfy the above conditions, the visibility of the decoration to other people is improved, while the visibility of the wearer is less likely to be obstructed.

[0191] [Method of manufacturing eyeglass lenses] The manufacturing method of the eyeglass lens of this embodiment will be described below. The contents not described below (for example, preferred examples) can be applied to the contents described in the above [Eyeglass Lens]. Conversely, the contents described below can be used as preferred examples for the above [Eyeglass Lens]. In this case, spots can be read as dots or removed portions.

[0192] <Outline of eyeglass lens manufacturing method> The method for manufacturing an eyeglass lens of this embodiment includes processing an eyeglass lens having a lens substrate and an optical interference layer with a laminated structure formed on the lens substrate to form a decorative portion. The method for manufacturing an eyeglass lens also includes a step of preparing image data corresponding to a desired decorative design (hereinafter sometimes referred to as step S1) and creating drawing data for laser processing based on the image data (hereinafter sometimes referred to as step S2), and a laser irradiation step of irradiating the optical interference layer with a laser beam while scanning the optical interference layer with a laser irradiation device using the drawing data to form the decorative portion.

[0193] The designs of characters, symbols, patterns, etc. to be formed on the decorative portion are configured as image data based on these desired designs. The image data is preferably binary data. The image data has a pixel size determined by a predetermined resolution (pixel density dpi), and the pixel size is the smallest unit that constitutes the image drawn on the lens.

[0194] Next, based on the image data, drawing data is created to be used when processing the optical interference layer by irradiating it with a laser beam such as a pulsed laser using a laser irradiation device. This is a process of creating drawing data including planned laser irradiation locations on the surface on which the optical interference layer is provided, from image data of the desired decorative design.

[0195] 8 and 9 are flow charts showing an example of the procedure of the method for manufacturing an eyeglass lens according to this embodiment. As shown in Fig. 8 and Fig. 9, laser processing is performed on a predetermined location of an eyeglass lens having an optical interference layer. This is a laser irradiation step in which, using the drawing data, a laser is irradiated onto the optical interference layer while scanning with a laser beam by a laser irradiation device, thereby forming the removed portion.

[0196] The eyeglass lens includes a lens substrate and an optical interference layer having a laminated structure in which a low refractive index layer and a high refractive index layer are stacked. As described above, the eyeglass lens may also include other layers such as a hard coat layer, a base layer, and a water-repellent layer. The frame cutting process along the contour of the lens shape may be performed before the laser processing (see FIG. 8) or after the laser processing (see FIG. 9).

[0197] 8, in the case of performing the decoration process after the frame cutting, first, one optical surface of the eyeglass lens to be processed (specifically, the optical surface that will not be subjected to the decoration process described later) is attached to a dedicated jig (jig blocking) (S101). Then, the blocked eyeglass lens is set in an edging machine, and the eyeglass lens is subjected to edging (frame cutting), and the outer shape of the eyeglass lens is cut into the frame shape (S102). The jig blocking and frame cutting can be performed using known techniques, so detailed explanations will be omitted here.

[0198] During laser processing, the lens height of the processing area (i.e., the three-dimensional shape of the processing area on the processing surface) is measured for the processing surface (specifically, the surface that is not blocked) of the eyeglass lens to be processed while it is still in a blocked state by the jig (S103). The measurement method is not particularly limited, but may be performed using, for example, a non-contact type three-dimensional measuring machine. The processing area is an area that includes the laser scan area described below.

[0199] After S103, or prior to or in parallel with S101 to S103, image data is prepared as described above (S1), and then drawing data is created based on the image data (S2). After measuring the lens height in the processing area, laser processing is performed by irradiating the processing area with laser light, and raster scanning is performed by moving the irradiation position of the laser light based on pre-prepared shape data (i.e., outline data of the lens shape) (S104). Note that the raster scanning may be vector scanning. Then, in this embodiment, before frame cutting processing, laser processing is performed on the eyeglass lens based on the outline data of the frame shape to form a design pattern consisting of a processed portion (removed portion A: incomplete optical interference layer) and an unprocessed portion (unremoved portion B: complete optical interference film).

[0200] After the design pattern is formed by laser processing, jig deblocking is performed to remove the eyeglass lens from the dedicated jig (S105), and the removed eyeglass lens is cleaned to remove any remaining material from the laser processing and any adhering matter (foreign matter) (S106).Then, a final lens appearance inspection (S107) is performed, and the manufacture of the eyeglass lens is completed.

[0201] On the other hand, as shown in Fig. 8, when frame cutting is performed after the design pattern is formed (after laser processing), first, as in S105, jig blocking of the eyeglass lens to be processed is performed (S111). Next, the lens height of the processing area on the processing surface of the eyeglass lens to be processed (i.e., the three-dimensional shape of the processing area on the processing surface) is measured (S112). The measurement method is the same as when decorative processing is performed after frame cutting as described above.

[0202] After measuring the lens height of the processing area, laser processing is performed by irradiating the processing area with laser light, and raster scanning is performed by moving the irradiation position of the laser light based on previously prepared drawing data (S113). Vector scanning may be used instead of raster scanning. In this way, laser processing is performed on the processing area of the processing surface of the eyeglass lens.

[0203] After the design pattern is formed (after laser processing), the laser-processed eyeglass lens is subjected to frame cutting. That is, the blocked eyeglass lens is set in an edge processing machine, and the eyeglass lens is subjected to edge processing (frame cutting), and the outer shape of the eyeglass lens is cut into the frame shape (S114). After the frame cutting process, jig deblocking is performed to remove the eyeglass lens from the dedicated jig (S115), and the removed eyeglass lens is cleaned to remove any remaining material from the processing and any adhering matter (foreign matter) (S116). Then, a final lens appearance inspection (S117) is performed, and the manufacture of the eyeglass lens is completed.

[0204] <Spot size (and therefore removal area and dot size) settings> Here, the manufacturing method of this embodiment preferably includes a step of determining the diameter (hereinafter referred to as the processing diameter) of one processing spot (hereinafter also referred to as the spot) produced by irradiation with a pulsed laser, corresponding to one pulse of the pulsed laser, depending on the specifications of the apparatus and the performance of the optical system. This is the smallest processing unit in drawing when removing and processing the optical interference layer. This makes it possible to determine the correspondence between the pixel size of the image data and the processing spot size produced by irradiation with one pulse of the pulsed laser. If this processing diameter matches the pixel size of the image data, laser processing can be performed by corresponding one pixel of the image data to one pulse.

[0205] The removed portions in the first region and the removed portions in the second region may have the same size and shape or may differ from each other. However, in consideration of ease of processing, it is preferable that the removed portions in each region have the same size and shape rather than changing the shape and diameter of the laser beam used for laser irradiation for each region.

[0206] The processing diameter per pulse can be substantially constant for one laser processing (one job), i.e., for laser processing of one surface of the eyeglass lens (here, the surface on the eyeball side). That is, in principle, processing spots with a constant pitch and a constant diameter are applied, and the color tone can be changed by varying their density, i.e., the removal area rate. By not forming some processing spots, i.e., by increasing the thinning rate of the processing spots, a region with a small removal area rate can be formed.

[0207] However, when decorating eye lenses, errors may occur in the focusing due to three-dimensional control during scanning because the processed surface is a curved surface created by complex optical calculations. However, fluctuations in spot size due to errors (for example, within ±20%, preferably within ±15%, or within ±10%) do not affect the aesthetics of the resulting decoration.

[0208] As a preferred example of the above paragraph, in a plan view of the eyeglass lens, the smallest unit of the removed portion in the first region is one dot-shaped removed portion, and the value of (minimum width + maximum width) / 2 in each of the dot-shaped removed portions may vary within a range of 20% (preferably within 15%, 10%) within the first region. The reason for adopting (minimum width + maximum width) / 2 is that even if the irradiated area is designed to be a perfect circle by laser irradiation, it may end up being an ellipse in the final eyeglass lens.

[0209] When a plurality of dots are linked to form the minimum unit of the removal portion, the above-mentioned rule of (minimum width+maximum width) / 2 may also be adopted for each dot.

[0210] The above (minimum width + maximum width) / 2 rule may be applied to 80% or more of all dots in the first and second regions, preferably 90% or more by number, 95% or more by number, 98% or more by number, 99% or more by number, or 100% by number, and hereinafter, "80% or more by number" in this specification can be similarly substituted with these preferred numerical ranges. It is also possible to make it so that 80% or more of all dots in the first region satisfy the above-mentioned requirement of (minimum width+maximum width) / 2. It is also possible to make it so that 80% or more of all dots in the second region satisfy the above-mentioned requirement of (minimum width+maximum width) / 2.

[0211] The processing diameter of one pulse can be, for example, in the range of 1 to 100 μm (or 1 to 200 μm). For example, it can be in the range of 5 to 80 μm, further 10 to 70 μm, or even 10 to 50 μm. The selection of the processing diameter affects the processing speed for decorating the desired design. Furthermore, the pitch in the X and Y directions for forming the processing spot corresponding to one pulse can also be in the range of 1 to 100 μm. The drawing method can be raster scanning or vector scanning. Alternatively, there is no particular limitation, and a pulse split method can also be used.

[0212] The dot-shaped removed portions can be composed of a pixel, which is the smallest unit of the image data, or can be composed of a plurality of pixels. The smallest unit of each removed portion formed on the lens surface is the pixel size, preferably 200 μm or less. This size is generally difficult for the human eye to resolve. By determining the regular arrangement of such minute dot-shaped removed portions based on a predetermined removal area ratio, it is possible to express areas of different color tones in multiple regions.

[0213] Image data and drawing data will be explained below. In the manufacturing method of this embodiment, first, image data corresponding to the desired design is prepared. The image data can be binary data. There are no restrictions on the format of the image data, and it can be, for example, a BMP file. Here, the size of one pixel is determined by the resolution (pixel density) of the image data. For example, if the image data has a resolution of 1000 dpi, one pixel is 25.4 μm. This is the smallest unit of image data.

[0214] There are no particular restrictions on the resolution of the image data to be handled. However, if high-definition decoration of eyeglass lenses is desired, 300 dpi or higher is preferable. Furthermore, if the resolution exceeds 2000 dpi, the resolution will be further improved, but it will be difficult for the human eye to recognize it as added value.

[0215] Known image processing software (e.g., Illustrator (registered trademark)) can be used to determine how spots are allocated based on the image resolution. In other words, when obtaining drawing data from image data, the image processing software can determine how many pulses (how many spots in the X direction and how many connected spots in the Y direction) are allocated to one pixel of the image data. In this case, by regularly arranging dots corresponding to one pixel (uniformly dispersing them in a specified area), it becomes easier to achieve the color tone of the specified area.

[0216] <Setting the number of spots per pixel> FIG. 13 is an explanatory diagram showing the correspondence between one pixel of image data and a processing spot formed by laser irradiation in a spectacle lens according to an embodiment. 1(a) is a diagram showing how 3×3 removed portions (the distance between the centers of adjacent removed portions is x0′ in both the X and Y directions) are connected in an XY lattice and set as one pixel. 1(b) is a diagram showing how 2×2 removed portions (the distance between the centers of adjacent removed portions is x0′ in both the X and Y directions) are connected in an XY lattice and set as one pixel. (c) is a diagram showing how 2x1 removed portions (the center distance between adjacent removed portions is x0'' which is smaller than x0') are connected in an XY lattice and set as one pixel. FIG. 10(d) is a diagram showing a state in which one removal portion is set to one pixel.

[0217] If the processing diameter matches the pixel size of the image data (for example, 25.4 μm in both the X and Y directions), one pixel of the image data can be assigned to one pulse for laser processing (Figure 13 (d)).

[0218] On the other hand, if the machining diameter of one pixel of image data and one laser pulse are not the same, multiple pulses can be assigned to one pixel and arranged for machining. The correspondence between the two is set based on the minimum unit of image data and the minimum unit of drawing data.

[0219] For example, 2×2 spots are allocated to one pixel of image data (FIG. 13(b)), or 3×3 spots are allocated (FIG. 13(a)), and adjustments are made as appropriate.

[0220] The number of spots in the X and Y directions does not have to be the same. For example, one pixel may be slightly longer in the X direction as shown in Figure 13(c) and 2 x 1 spots may be allocated. In this case, the distance between the centers of the spots may be set smaller to make one pixel closer to a square. For example, the distance between the centers of the spots may be set narrower than the distance between the centers of the v x v spots (v is an integer of 2 or more) as shown in Figures 13(a) and 13(b) (x0' in Figure 13). <x0´)。

[0221] <Setting the pitch in the X and Y directions of adjacent spots (XY grid setting)> When allocating spots to one pixel of image data, it is preferable to determine irradiation conditions including the number of spots and their arrangement (pitch in the X and Y directions) that correspond to the pixel size of the image data.

[0222] When setting the pitch of adjacent spots in the X and Y directions, the irradiation energy distribution (beam profile) and the characteristics of the design to be processed are taken into consideration, and the number of spots and their arrangement (pitch in the X and Y directions) can be selected as an optimal combination to create drawing data. For example, it may be considered that the processing strength of the overlapping areas of processing spots changes depending on the irradiation energy distribution of one pulse. Therefore, whether adjacent processing spots are to overlap and, if so, the overlap width may also be determined at this stage depending on the beam profile.

[0223] This overlap width (also broadly referred to as the "degree of overlap") is an important factor that influences whether or not the optical interference layer is damaged.

[0224] However, if we simply think that overlapping is the only way to go, then in cases where it is necessary to assign multiple spots to one pixel, the spots will have to overlap, which contradicts this idea.

[0225] Therefore, one of the distinctive features of this embodiment is that it examines the upper limit of this overlapping degree (broadly speaking, what degree of overlapping is necessary to prevent damage) and determines the minimum possible value for the distance between the centers of the spots.

[0226] Then, based on this minimum value, a virtual XY grid is set on the surface of the eyeglass lens where the removed portion is to be provided, and spots are arranged at the intersections of this XY grid, which is one of the features of this embodiment.

[0227] One method for achieving the above is as follows.

[0228] "When the mutually perpendicular directions are the X and Y directions, and the combination of lines arranged at equal intervals s (symbol s in Figure 12) in the X direction and lines arranged at equal intervals t (symbol t in Figure 12) in the Y direction is an XY grid (vertical and horizontal lines in Figure 12), The drawing data is data including at least X and Y coordinates (and may include Z coordinates), Based on the relationship between the total amount of laser irradiation and the degree of damage to the layers below the high refractive index layer, A minimum center-to-center distance x0 between the centers of the laser irradiation, which indicates the degree of overlap of the laser irradiation points in the X direction, is set so as to suppress the occurrence of the damage, and the minimum center-to-center distance x0 is set to the equal interval s; A minimum center-to-center distance y0 between the centers of the laser irradiation, which indicates the degree of overlap of the laser irradiation points in the Y direction, is set so as to suppress the occurrence of the damage, and the minimum center-to-center distance y0 is set to the equal interval t; A common XY lattice is used for the first area and the second area, and each of the laser irradiation points in the first area and each of the laser irradiation points in the second area are set to include only one intersection of the XY lattice.

[0229] The "relationship between the total amount of laser irradiation and the degree of damage to the layers below the high refractive index layer" may be obtained in advance before carrying out the method for manufacturing a spectacle lens according to this embodiment.

[0230] The relationship may be obtained as follows, which is merely an example. For example, a Gaussian distribution of light intensity is obtained according to the center-to-center distance of adjacent spots. It is preferable that the conditions of this preliminary test, except for the center-to-center distance of the spots, be the same as the conditions when actually carrying out the manufacturing method of eyeglass lenses, because this will allow for more realistic test results to be obtained.

[0231] The surface of the optical interference layer when the Gaussian distribution is obtained is observed with a microscope or the like to check whether or not damage has occurred, and if so, the extent of the damage is confirmed. This allows a distance that will not cause damage, or a distance that is tolerable even if damage occurs, to be found according to the center-to-center distance of adjacent spots, and a single center-to-center distance is set.

[0232] This center-to-center distance may be set separately for the X direction (symbol s) and the Y direction (symbol t) as shown in FIG. 12 (distance s≠distance t in FIG. 12), or if it is decided from the beginning that the center-to-center distance in both directions should be the same, the setting may be made for only one direction.

[0233] As mentioned above, it is preferable to make the arrangement of the removal portions different between the first and second regions. One example of using the above-mentioned XY lattice is to make the arrangement patterns of spots at the intersections of the XY lattice different from each other.

[0234] As mentioned above, the pattern formed by the removed portions A can be formed into a stripe shape, a grid shape, or a combination thereof by arranging the dot-shaped removed portions. The stripes or grid formed by the arrangement of the dot-shaped removed portions can be easily produced by using the virtual XY grid. In this case, by "setting each of the laser irradiation points in the first region and each of the laser irradiation points in the second region to include only one intersection of the XY grid," the removed portions can be arranged regularly, and either a stripe shape or a grid shape can be easily produced.

[0235] For example, each of the removed portions in the first region and each of the removed portions in the second region may include only one intersection of the XY grid. To take an example familiar to people in Japan, dot-shaped removed portions may be arranged so that Go stones are placed only at the intersections of the vertical and horizontal lines of a Go board.

[0236] This means that a manufacturing process in which a common XY lattice is adopted for both the first and second regions and then performed on the intersections of these (for example, Figures 2 and 12) is reflected in the manufactured eyeglass lens in the form of a specific configuration. Although the present invention does not exclude cases in which a common XY lattice is not adopted for both regions, a preferred example is to adopt a common XY lattice for both regions.

[0237] The first region can be formed simply by determining which intersections to irradiate with the laser, which reduces the difficulty of manufacturing. This configuration is also adopted in Figures 1, 3, and 4.

[0238] The rule that spots (removed portions, dots) are placed at the intersections of the XY lattice is preferably satisfied by 80% or more of all dots on the spectacle lens.

[0239] To summarize the above, in the method for manufacturing a spectacle lens according to the present embodiment, Setting the desired diameter when using a pulsed laser (e.g., a value between 20 and 25 μm) After setting the laser diameter, set the center distance between dots so that even if the irradiated areas (dots) are connected, damage caused by high light intensity at the connected parts is within an acceptable range. Setting the grid spacing based on the center-to-center distance (and thus setting the grid intersection arrangement) It is preferable that the lattice spacing is set based on this technical idea.

[0240] In a planar view of the spectacle lens, the removed portions may be thinned out according to a first thinning rule from a virtual state in which the removed portions are formed at all of the intersections of the XY lattice. The removed portions in the second region may be thinned out according to a second thinning rule different from the first thinning rule from a virtual state in which the removed portions are formed at all of the intersections of the XY lattice (e.g., x33 → x32, x31 in FIG. 2). More specifically, the removed portions in the first region may be arranged in accordance with the first rule by thinning out some of the removed portions in the second region. Setting the center-to-center distance close to the upper limit of damage tolerance narrows the lattice spacing, increasing the number of lattice intersections and increasing the degree of freedom in thinning out some of the removed portions (increasing the number of intersections at which removed portions are not arranged). The first thinning rule leads to the establishment of a first rule regarding the arrangement of removed portions. Similarly, the second thinning rule leads to the establishment of a second rule regarding the arrangement of removed portions.

[0241] Furthermore, by setting the XY grating in advance during laser irradiation as described above, in a plan view of the eyeglass lens, the center-to-center distance between adjacent removed portions in one direction H in the first region is always T times the center-to-center distance between adjacent removed portions in the same direction H in the second region (0.9*m / n≦T≦1.1*m / n (where m and n are natural numbers)). 0.9 and 1.1 are assumed to be a variation range. The direction H and the direction G mentioned in the regularity of the center-to-center distance may be the same direction or different directions. If they are different directions, one may be the X direction and the other the Y direction. 0.8 (preferably 0.95, 0.99) may be used instead of 0.9, and 1.2 (preferably 1.05, 1.01) may be used instead of 1.1.

[0242] The formula above satisfies the requirement that the minimum center-to-center distance be used as the XY grid spacing. Area x32 (n=2 in the formula above) and area x33 (m=3 in the formula above) in Figure 2 are examples that satisfy the relationship in the formula above. Furthermore, when the area (1) enclosed by a dashed line in the upper left of Figure 12 (discussed below) is considered the second area, the dots on the horizontal line have multiple center-to-center distances (for example, s and 2s in the figure). When the area (2) to the right of the area (1) enclosed by a dashed line in the upper left is considered the first area, the center-to-center distance is 3s (3s in the figure). In this case, when the center-to-center distance s is used as the reference, the center-to-center distance is (3, a natural number) / (1, a natural number), or 3 times, and when the center-to-center distance 2s is used as the reference, the center-to-center distance is (3, a natural number) / (2, a natural number), or 1.5 times. Conversely, when the area (1) enclosed by a dashed line in the upper left of Figure 12 described below is defined as the first area, and the area (2) to the right of the area (1) enclosed by a dashed line in the upper left is defined as the second area, if the center-to-center distance 3s of the second area is used as the reference, the center-to-center distance s can be expressed as (1, a natural number) / (3, a natural number), or 1 / 3 times, and the center-to-center distance 2s can be expressed as (2, a natural number) / (3, a natural number), or 2 / 3 times.

[0243] When the density of the removed portions is lower in the first region than in the second region, the center-to-center distance in the first region is greater, and m>n holds. There are no limitations on the values of m and n. However, a large value for n means that there are many lattices between adjacent removed portions in the second region, which in turn means that there are large spaces between dots, whereas a large value for m means that there are many lattices between adjacent removed portions in the first region, which in turn means that there are large spaces between dots. Therefore, the upper limit of m and n may be any natural number equal to or less than 10, and specifically, m and n may be equal to or less than 5, or equal to or less than 4, or equal to or less than 3.

[0244] Not limited to the above formula, the definitions in this specification regarding one direction (e.g., X direction) can also be applied to a direction perpendicular to the one direction (e.g., Y direction). It is preferable that the definitions be satisfied in both the one direction and the perpendicular direction. For example, in a planar view of the eyeglass lens, the center-to-center distance between adjacent removed portions in a direction H' perpendicular to one direction H in the first region may be T' times the center-to-center distance between adjacent removed portions in the same direction H' in the second region (0.9*m' / n'≦T'≦1.1*m' / n' (where m' and n' are natural numbers)).

[0245] In this way, the characteristics of one step of the manufacturing method can be reflected in the structure of the eyeglass lens.

[0246] Regarding the allocation of spots to one pixel, it is preferable to adopt the following configuration. "The relationship between the total amount of laser irradiation and the degree of damage to the lower layers below the high refractive index layer, The size of one side of one pixel of the image data; Based on In the drawing data, the number of intersections of the XY grid to be arranged within a portion corresponding to one pixel of the image data is set.

[0247] For example, in Figure 13(a), the number of intersections is set to 9 (3 x 3), and in Figure 13(b), the number of intersections is set to 4 (2 x 2).

[0248] It is possible to set a common XY lattice for the entire surface of the eyeglass lens, or to set an XY lattice with different lattice intervals for each decorative portion.

[0249] <Laser processing details> Next, laser processing, which is a non-heating processing, will be described in more detail.

[0250] In this embodiment, as shown in Figure 7, for example, laser light is irradiated onto the optical interference layer 13 covering the optical surface of the lens substrate 11, thereby partially removing at least a portion of the low refractive index layer 131 or the high refractive index layer 132 of the optical interference layer 13, thereby forming a design pattern (laser processing). The following description will be given taking, as an example, the processing of the optical interference layer shown in Table 1 above, but is not limited thereto. When laser light passes through the outermost SiO2 layer and reaches the underlying SnO2 layer, the SnO2 layer is sublimated or evaporated by the energy of the irradiation, and at least partially disappears from the irradiated area along with the upper SiO2 layer. In other words, laser processing using laser light irradiation partially removes predetermined layers, including the outermost low-refractive-index layer SiO2 layer 131a. At this time, the underlying high-refractive-index layer may be exposed at the irradiated area. Through this removal process, a design pattern is formed. When the high-refractive-index layer is exposed, the high-refractive-index layer is, for example, ZrO2 layer 132c.

[0251] The SnO2 layer 132a can be formed to a small thickness (for example, 3 to 20 nm, more preferably 3 to 10 nm). In this embodiment, the thickness is set to 5 nm.

[0252] SnO2 functions as a reactive layer that is highly reactive to laser irradiation. In addition to SnO2, indium tin oxide (ITO) can also be used as a material for this reactive layer.

[0253] By laser irradiation, SnO2 is removed by sublimation or evaporation, but the reaction layer does not need to be completely removed, and a portion may remain at the irradiated portion. For example, the reaction layer may be at least partially removed in the thickness direction of the layer by laser irradiation.

[0254] The phenomenon that occurs during laser irradiation is thought to be as follows. The reactive layer (SnO2, ITO, etc.) is preferably a conductive layer with higher conductivity than the other layers in the laminate structure. If conductive, the material of the reactive layer has a smaller band gap, at which excitation occurs when irradiated with a laser under the conditions described below, than the SiO2 and ZrO2 on the upper layer (outermost surface), and is therefore more likely to absorb energy. For this reason, the reactive layer is more likely to disappear due to sublimation / evaporation than other layers. At this time, a phenomenon known as multiphoton absorption (e.g., two-photon absorption) is thought to occur, which is thought to enable efficient laser processing.

[0255] Regarding the concern that the ZrO2 underneath may be damaged by evaporation or dissolution due to the irradiation energy after the SnO2 has disappeared, it is possible to take advantage of the delay before such damage occurs by controlling the irradiation conditions, thereby essentially removing only the reaction layer and the layers above it. Furthermore, it has been found that selecting an ultrashort pulse laser, which will be described later, is advantageous for such precise processing control.

[0256] Here, a laser processing device used for laser processing will be briefly described. FIG. 10 is an explanatory diagram showing an example of the schematic configuration of a laser processing device used in the method for manufacturing eyeglass lenses according to this embodiment.

[0257] As shown in FIG. 10, the laser processing apparatus used in this embodiment includes a laser light source unit 21, an aperture 22, a galvanometer scanner unit 24, and an optical system 25, and is configured to irradiate the optical interference layer 13 with laser light via these units 21, 22, 24, and 25.

[0258] The laser light source unit 21 emits laser light used in laser processing, and is configured to emit an ultrashort pulse laser.

[0259] The pulse width of the ultrashort pulse laser in this embodiment is preferably 0.01 picoseconds (10 femtoseconds) or more and 100 picoseconds or less, more preferably 0.01 picoseconds or more and less than 50 picoseconds, and even more preferably 0.1 picoseconds or more and less than 15 picoseconds.

[0260] The wavelength of the ultrashort pulse laser can be, for example, 355 nm THG (Third Harmonic Generation) or 532 nm SHG (Second Harmonic Generation), as well as a fundamental wavelength of 1064 nm. The irradiation beam diameter can be selected according to the desired processing design. In order to process fine designs with high resolution, it is effective to narrow the beam diameter. In this case, shorter wavelengths are more advantageous, so of the wavelengths listed above, 532 nm is preferred, and 355 nm is more preferred. Alternatively, 266 nm FHG (Fourth Harmonic Generation) is also suitable.

[0261] The pulse energy of the ultrashort pulse laser is, for example, 0.1 μJ to 30 μJ (maximum of about 60 μJ) at 50 kHz. The beam diameter of the ultrashort pulse laser is, for example, 10 μm to 30 μm.

[0262] The following was found regarding the laser irradiation conditions. (1) When the pulse width of an ultrashort pulse laser is less than 0.1 picoseconds Good processing can be achieved with any wavelength between 266 and 1064 nm. Shorter wavelengths are more advantageous for fine processing. However, they impose a heavy burden on production in terms of equipment maintenance and costs. (2) When the pulse width of the ultrashort pulse laser is 0.1 picoseconds or more but less than 1 picosecond Good processing can be performed with any wavelength between 266 and 1064 nm. Shorter wavelengths are more advantageous for fine processing. (3) When the pulse width of the ultrashort pulse laser is 1 picosecond or more and less than 100 picoseconds Good processing can be achieved with any wavelength between 266 and 1064 nm. Shorter wavelengths are more advantageous for fine processing, and are preferable in terms of equipment maintenance, costs, and stability of production conditions. (4) When the pulse width of an ultrashort pulse laser is 100 picoseconds or more and less than 1 nanosecond Depending on the wavelength used, uneven processing stability may occur. For example, if a short wavelength of 266 nm is used as the applicable wavelength, damage may occur to the lower layer as the SnO2 reacts. Also, even with 355 nm, depending on the irradiation conditions, it may be difficult to achieve uniform processing, and the removal processing may reach the lower layer below the SnO2. (5) Ultrashort pulse laser with a pulse width of 1 nanosecond or more It is difficult to select processing conditions that will selectively remove SnO2 and the layer on the surface above it.

[0263] In the cases of (4) and (5) above, the visibility of the processed pattern may be affected. For example, in the case of eyeglass lenses, there is a risk of interference with the wearer's field of vision.

[0264] In order to prevent the above-mentioned inconveniences, it is essential that the removal processing using an ultrashort pulse laser is uniform in terms of the processing diameter and processing depth. To achieve this, it is considered useful to apply a predetermined ultrashort pulse width to control and utilize the duration of the energy emitted by irradiation and the delay in ablation of the underlying material.

[0265] As long as such an ultrashort pulse laser can be emitted, the specific configuration of the laser light source unit 21 or the combination of wavelength and pulse width is not particularly limited.

[0266] The laser processing apparatus may further include a beam shaper unit. For example, the beam shaper may be used to convert the laser beam from the laser light source unit 21 from a Gaussian energy distribution to a top-hat energy distribution, thereby enabling laser processing using laser beams with a uniform energy distribution. These methods change the energy distribution of the irradiation spot, and therefore the suitability of these methods can be taken into consideration when selecting the arrangement and pitch of the processing diameter relative to the pixels of the image data.

[0267] Alternatively, the design pattern may be formed by applying energy irradiation with a Gaussian distribution without using a beam shaper.

[0268] On the other hand, the present inventors have further discovered that even more significant effects can be obtained by incorporating the following innovations. Specifically, it has been discovered that the removed portions A can be uniformly formed in a fine pattern with a minimum unit of 200 μm or less, and that a spectacle lens that satisfies the conditions of the characteristics of this embodiment can be processed. It has also been discovered that the removed portions A can be stably processed into a smooth surface with a surface roughness Ra of less than 0.0080 μm.

[0269] Specific examples of the configuration include satisfying at least one of the following: The beam divergence angle of the ultrashort pulse laser must be less than 0.300 mrad. The mode quality M2 of the ultrashort pulse laser must be 1.1 or less. An aperture is applied to the beam of the ultrashort pulse laser, and the diameter of the aperture is set to 80 μm or less, or 60 μm or less, or even 30 μm or less, or 25 μm or less.

[0270] It has been found that by employing the above-described configuration, it is possible to irradiate the optical interference layer of the eyeglass lens, which is the workpiece, with necessary and sufficient energy while maintaining uniformity of the surface.

[0271] In addition, spectacle lenses are usually constructed with curved surfaces. Therefore, by adopting the above-described configuration, it is possible to provide a margin in the depth of focus compared to when a top-hat type distribution is directly adopted. This means that, as mentioned above, it is advantageous for stably obtaining smoothness as a region.

[0272] The galvano scanner unit 24 moves the irradiation position of the laser light from the laser light source unit 21 two-dimensionally or three-dimensionally, thereby enabling scanning with the laser light, thereby forming a desired design pattern by laser processing. The scannable range of the laser light by the galvano scanner unit 24 (i.e., the maximum laser processing area) is set to a size and shape that can completely encompass the outer shape of the eyeglass lens to be processed.

[0273] The optical system 25 can be configured by combining optical lenses such as telecentric lenses and mirrors, and guides the laser light from the laser light source unit 21 so that the laser light reaches the processing location of the eyeglass lens.

[0274] Next, a laser processing procedure performed using the laser processing device configured as above will be described.

[0275] In laser processing, first, the eyeglass lens to be processed is set in the laser processing device. At this time, the eyeglass lens is set so that the optical surface of the eyeglass lens, more specifically, the surface of the optical interference layer 13 on the optical surface, becomes the surface to be processed. The optical surface to be processed may be either the surface on the object side or the surface on the eyeball side, but here, for example, the surface on the eyeball side is used as the surface to be processed.

[0276] After the eyeglass lens is set, the laser light source unit 21 and the galvano scanner unit 24 are operated based on the drawing data created in advance (i.e., data for laser processing created based on image data corresponding to the design to be obtained). As a result, the processing area on the processing surface of the eyeglass lens is irradiated with the ultrashort pulse laser so as to form a removal pattern that is part of the design configuration.

[0277] When the ultrashort pulse laser is irradiated, the ultrashort pulse laser passes through the water-repellent layer 14 on the surface to be processed of the eyeglass lens and reaches the optical interference layer 13 on the surface to be processed. When the ultrashort pulse laser reaches the optical interference layer 13, laser processing is performed by the ultrashort pulse laser.

[0278] The ablation processing of this embodiment is a technology that enables highly energy-efficient processing by utilizing the multiphoton absorption phenomenon of an ultrashort pulse laser. More specifically, it is a removal processing that minimizes the thermal influence around the processing area and causes the irradiated area of the laser beam to instantly melt, evaporate, or sublimate and scatter. With this type of laser processing, highly reactive materials are instantly removed from the irradiated area, resulting in less thermal influence around the processing area and reduced thermal damage (such as deformation due to heat).

[0279] The laser processing according to this embodiment can be ablation processing as non-heat processing. Such processing can cause a multiphoton absorption process (e.g., a two-photon absorption process) that results in the multiphoton absorption phenomenon mentioned above. Therefore, multiphoton absorption can efficiently and effectively process materials that are relatively transparent (highly transmittant) to lasers. In this case, a wide range of applicable laser wavelengths can be used, and for example, 355 nm (THG), 532 nm (SHG), and 1064 nm can be advantageously used as the wavelength of the laser light.

[0280] As mentioned above, a picosecond laser or femtosecond laser with a short pulse width is advantageous for inducing the multiphoton absorption. Specific values include a pulse width of less than 100 picoseconds, preferably less than 50 picoseconds, and more preferably less than 1 picosecond (i.e., femtosecond). The pulse width is preferably 10 femtoseconds or more and less than 100 picoseconds.

[0281] When laser processing is performed by irradiating the ultrashort pulse laser, the laser penetrates the SiO2 of the multilayer structure constituting the optical interference layer 13 and reaches the reactive layer (SnO2 in this embodiment). The reactive layer instantly reacts and sublimes / evaporates, removing the SiO2 layer 131a, which is the outermost layer. In this way, only predetermined layers, including the outermost layer of the optical interference layer, are partially removed in the shape of the laser-processed portion, which is part of the design pattern. This also removes the corresponding portion of the water-repellent layer 14. As a result, the ZrO2 layer 132b located below the SnO2 layer 132a may be exposed at the irradiated location.

[0282] By carrying out the above-described laser processing, predetermined layers including the SiO2 layer 131a, which is the outermost layer of the optical interference layer 13, are partially removed, and a design pattern is formed (laser processing) on the processed surface of the eyeglass lens. As described above, the irradiated portion where the predetermined laser irradiation is performed is partially processed within the surface to be processed.

[0283] According to the above method, by designing the image data of the laser-processed portion with a minimum unit size of 200 μm or less, it is possible to form the removed portion A in a pattern configured with a minimum unit processing diameter of 200 μm or less. Therefore, in the manufacturing method of this embodiment, the optical interference layer is irradiated with an ultrashort pulse laser in a predetermined pattern configured with a minimum unit size of 200 μm or less, and at least one layer of the laminate structure can be removed in that pattern. As a result, by adjusting the pattern and removal area ratio of the decorative portion during this removal, it is possible to change the color tone of the decorative portion for each region and control its visibility.

[0284] The drawing data for the laser-processed portion may be composed of dots, with the spot diameter of one laser processing pulse as the smallest unit, for example. In this case, dense patterns can be formed more precisely. Furthermore, by performing processing while partially overlapping each dot formed by laser processing, it is easy to form not only dots but also various characters, symbols, line drawings, etc. as the removed portion A. For example, by forming multiple dots in one direction while partially overlapping them, it is possible to form a linear removed portion A with a line width equal to the diameter of the dot. Furthermore, by further overlapping linear removed portions A that can be formed in this way in the line width direction, it is possible to form an area consisting only of removed portions A.

[0285] Furthermore, by using a dot as the minimum unit of drawing data for the laser processing portion, the removal area ratio of a pattern formed by regularly arranging dots can be easily adjusted by adjusting the spacing between dots. That is, by narrowing the spacing between dots and creating a pattern with a high dot density, it is possible to form an area with a high removal area ratio.

[0286] The above describes the case where one pixel of image data and the spot per pulse of drawing data are the same size, but even when multiple spots are assigned to one pixel, an area with a desired color tone can be formed by forming an removal pattern for each pixel.

[0287] [glasses] The eyeglasses according to this embodiment can also be applied to eyeglasses that include an eyeglass frame and an edged eyeglass lens that has an object-side surface and an eyeball-side surface. By replacing the "eyeglass lens" described above with "edge-shaped eyeglass lens," the content described above can be applied to eyeglasses.

[0288] In addition to the usual full-rim type, eyeglass frames may also be rimless or half-rim type (this type includes eyeglass frames in which there is no rim even in part around the periphery of the eyeglass lens after shaping).

[0289] [Optical components] The eyeglass lens according to this embodiment can also be used as an optical element having a similar configuration. For optical elements, a substrate and an optical interference layer suitable for the intended use are selected. Examples of optical elements include protective films for liquid crystal screens, window components, face shields, and trial eyeglass lenses that do not yet reflect the wearer's prescription. The above-mentioned content can be applied by replacing the term "eyeglass lens" with "optical element."

[0290] The technology according to this embodiment makes it possible to decorate eyeglass lenses with desired designs, such as letters, symbols, and patterns, as well as technical or commercial markings, and also provides eyeglass lenses, eyeglasses, and methods for manufacturing eyeglass lenses that are decorated with greater freedom and richer expression. [Example]

[0291] Examples of the eyeglass lens according to this embodiment will be described below, but the present invention is not limited to the following examples.

[0292] The present invention corresponds to a spectacle lens having a region (50% removed) (e.g., the first region) produced in the following Test Example 2 and another region. The other region referred to here is, for example, the unprocessed region in the following Test Example 1 or the solid pattern region in the following Test Example 3, or a variation of the region produced in Test Example 2. Therefore, more precisely, each of the following Test Examples is a reference example rather than an embodiment. Each of the following Test Examples is a test to quantitatively demonstrate that Test Example 2, which corresponds to the first region, has a color tone different from both the unprocessed region and the solid pattern region.

[0293] An anti-reflection coating (product name: Venus Guard Coat Lapis RUV) was formed on the object-side and eyeball-side surfaces of a urethane lens substrate. The anti-reflection coating on the eyeball-side surface was processed by irradiating it with an ultrashort pulse laser. The laser conditions were a wavelength of 355 nm, a pulse width of 12 picoseconds, and a processing diameter per pulse of approximately 20 μm. The dimensions of the processed area were 20 mm x 20 mm. That is, the average reflectance and color space values L*, a*, and b* shown below were measured for this 20 mm x 20 mm area.

[0294] As Test Example 1, a spectacle lens with the above anti-reflection film that had not been subjected to the above processing was prepared. As Test Example 2, the above processing was performed on the 20 mm x 20 mm area, and an eyeglass lens with the above anti-reflection coating was prepared with a removal area ratio of 50%. To achieve a removal area ratio of 50%, the above XY lattice was imagined, and spots (intersections of the XY lattice) were assigned to one pixel (three in the X direction and two in the Y direction). Then, these connected spots were arranged at intervals of one intersection in the X direction and two intersections in the Y direction. As Test Example 3, a spectacle lens with the above anti-reflection film was prepared, on which a solid pattern was formed with an unprocessed portion being zero.

[0295] The average reflectance and color space values for each test example are shown in the table below. A plot of the average reflectance for each test example (vertical axis: average reflectance (%), horizontal axis: wavelength (nm)) is shown in Figure 14. [Table 2]

[0296] The above table confirms the change in hue due to the processing of the present invention.

[0297] First, when comparing Test Examples 2 and 3 (50% processed, 100% processed) with Test Example 1 (unprocessed), it can be seen that the lightness index L* increases, and the lightness becomes higher.

[0298] Furthermore, in Test Example 2 (50% processed), the color coordinate a* value decreased and the color coordinate b* value increased significantly compared to Test Example 1 (unprocessed). This indicates that Test Example 2 (50% processed) has less redness, less blueness, and more yellowness compared to Test Example 1 (unprocessed). Furthermore, the change in the absolute values of a* and b* indicates that saturation has decreased. This indicates that the color tone γ produced by Test Example 2 (50% processed) is different from the color tone α produced by Test Example 3 (100% processed) and the color tone β produced by Test Example 1 (unprocessed). [Explanation of symbols]

[0299] 1... eyeglass lens, 2... eyeglass frame shape line, 11... lens substrate, 12... hard coat layer, 13... optical interference layer, 14... water-repellent layer, 21... laser light source section, 22... aperture, 24... galvanometer scanner section, 25... optical system, 131... low refractive index layer, 132... high refractive index layer, A... removed section, B... non-removed section, x1, x2, x31, x32, x33... area, X1, X2, X3... decorative section

Claims

1. A spectacle lens having an object-side surface and an eyeball-side surface, A lens substrate; an optical interference layer having a laminated structure provided on at least one surface of the lens substrate; and At least one of the surfaces of the eyeglass lens on which the optical interference layer is provided is a first region in which removed portions, in which at least one layer of the optical interference layer is locally removed, are arranged with a first regularity, and a non-removed portion, in which the layer is not removed, exists between the removed portions; a second region which is a region in which the removed portions are arranged with a second regularity or a region consisting of the non-removed portions; and the first region and the second region are visually recognized as regions of different color tones, A spectacle lens that satisfies any one of the following (1) to (3): (1) In a plan view of the eyeglass lens, the minimum unit of repetition of the removed portions in the first region is a plurality of dot-shaped removed portions connected to each other, and the non-removed portions in the first region surround each of the removed portions, or (2) the non-removed portion of the first region is surrounded by the removed portion; or (3) The non-removed portion of the first region is a combination of (1) and (2).

2. The eyeglass lens according to claim 1 , wherein the color tone includes at least one of brightness and darkness of color, color shading, brightness and darkness due to differences in the amount of reflected light, and brightness and brightness occurring in the region.

3. the color tone is single within the first region, The eyeglass lens of claim 2 , wherein the color tone is uniform within the second region.

4. the optical interference layer having a laminated structure is an antireflection film having a multilayer structure in which a low refractive index layer and a high refractive index layer are laminated, The eyeglass lens according to claim 1 , wherein the removed portion is formed by partially removing the low refractive index layer that is the outermost layer of the multi-layer structure.

5. the first region; a second region in which the removed portions are arranged with a second regularity; and The eyeglass lens according to claim 1 , wherein the first region and the second region have different arrangements of the removed portions.

6. The eyeglass lens according to claim 1 , wherein the first regularity is a pattern in which the removed portions are repeatedly arranged in at least one direction.

7. 7. The eyeglass lens according to claim 6, wherein, in a planar view of the eyeglass lens, the smallest unit of repetition of the removed portions in the first region is one dot-shaped removed portion, and the value of (minimum width + maximum width) / 2 in each of the dot-shaped removed portions varies within a range of 20% within the first region for 80% or more of the number of dots in the first region.

8. In a plan view of the eyeglass lens, when the directions perpendicular to each other are the X direction and the Y direction, and a combination of straight lines arranged at equal intervals in the X direction and straight lines arranged at equal intervals in the Y direction is defined as an XY lattice, 6. The eyeglass lens according to claim 5, wherein a common XY lattice is used in the first region and the second region, and each of the removed portions in the first region and each of the removed portions in the second region includes only one intersection of the XY lattice.

9. In a plan view of the eyeglass lens, the removed portions in the first region are thinned out in accordance with a first thinning rule from a virtual state in which removed portions are formed at all intersections of the XY lattice, 9. The eyeglass lens according to claim 8, wherein the removed portions in the second region are thinned out in accordance with a second thinning rule that is different from the first thinning rule from a virtual state in which removed portions are formed at all of the intersections of the XY lattice.

10. the first regularity includes a regularity of the center-to-center distances between the removed portions in one direction G in the first region, The eyeglass lens according to claim 5 , wherein the second regularity includes a regularity of the center-to-center distance between the removed portions in one direction G in the second region.

11. In a plan view of the eyeglass lens, the center-to-center distance between adjacent removed portions in one direction H in the first region is T times the center-to-center distance between adjacent removed portions in the second region in the direction H, 6. The spectacle lens according to claim 5, wherein 0.9*m / n≦T≦1.1*m / n (where m and n are natural numbers).

12. The eyeglass lens according to claim 5 , wherein the second region is made up of only the removed portion.

13. The eyeglass lens according to claim 5 , wherein the luminous transmittance of the first region and the luminous transmittance of the second region are both 80% or more.

14. The eyeglass lens according to claim 1 , wherein the maximum width of the removed portion is 200 μm or less.

15. A pair of eyeglasses comprising an eyeglass frame and a shaped eyeglass lens having an object-side surface and an eyeball-side surface, A pair of eyeglasses, wherein the eyeglass lens is the eyeglass lens according to any one of claims 1 to 14.

16. A method of manufacturing a spectacle lens having an object-side surface and an eyeball-side surface, comprising: In a spectacle lens having a lens substrate and an optical interference layer having a laminated structure provided on at least one surface of the lens substrate, at least one of the surfaces on which the optical interference layer is provided is provided, a first region in which removed portions, in which at least one layer of the optical interference layer is locally removed by laser irradiation, are arranged with a first regularity, and non-removed portions, in which the layer is not removed, exist between the removed portions; a second region, which is a region where the removed portions are arranged with a second regularity by laser irradiation or a region consisting of the non-removed portions; Forming The first region and the second region are visually recognized as regions having different color tones, A method for manufacturing a spectacle lens that satisfies any one of the following (1) to (3): (1) In a plan view of the eyeglass lens, the minimum unit of repetition of the removed portions in the first region is a plurality of dot-shaped removed portions connected to each other, and the non-removed portions in the first region surround each of the removed portions, or (2) the non-removed portion of the first region is surrounded by the removed portion; or (3) The non-removed portion of the first region is a combination of (1) and (2).

17. creating drawing data including a planned laser irradiation location on the surface provided with the optical interference layer from image data of a desired decorative design; a laser irradiation step of irradiating the optical interference layer with a laser beam while scanning the optical interference layer with the laser irradiation device using the drawing data to form the removed portion; and the optical interference layer having a laminated structure is an antireflection film having a multilayer structure in which a low refractive index layer and a high refractive index layer are laminated, The method for manufacturing a spectacle lens according to claim 16, wherein the removed portion is formed by partially removing the low refractive index layer that is the outermost layer of the multi-layer structure.

18. the first region; a second region in which the removed portions are arranged with a second regularity by laser irradiation; Forming The method for manufacturing a spectacle lens according to claim 17 , wherein the arrangement of the removed portions is made different between the first region and the second region.

19. When the X and Y directions are perpendicular to each other, and a combination of lines arranged at equal intervals s in the X direction and lines arranged at equal intervals t in the Y direction is defined as an XY lattice, The drawing data includes at least X and Y coordinates, Based on the relationship between the total amount of laser irradiation and the degree of damage to the layers below the high refractive index layer, a minimum center-to-center distance x0 between the centers of the laser irradiation, which indicates the degree of overlap of the laser irradiation points in the X direction, is set so as to suppress the occurrence of the damage, and the minimum center-to-center distance x0 is set to the equal interval s; a minimum center-to-center distance y0 between the centers of the laser irradiation, which indicates the degree of overlap of the laser irradiation points in the Y direction, is set so as to suppress the occurrence of the damage, and the minimum center-to-center distance y0 is set to the equal interval t; A common XY grating is adopted in the first area and the second area, The method for manufacturing eyeglass lenses according to claim 18, wherein each of the laser irradiation points in the first region and each of the laser irradiation points in the second region are set to include only one intersection of the XY lattice.

20. The relationship between the total amount of laser irradiation and the degree of damage to the layers below the high refractive index layer; The size of one side of one pixel of the image data; Based on The method for manufacturing a spectacle lens according to claim 19, wherein the number of intersections of the XY lattice arranged in a portion corresponding to one pixel of the image data is set in the drawing data.

21. the laser irradiation points in the first region are arranged in a manner in which the irradiation points are thinned out in accordance with a first thinning rule from a virtual state in which the laser is irradiated onto all intersections of the XY lattice, 20. The method for manufacturing eyeglass lenses according to claim 19, wherein the laser irradiation points in the second region are arranged in such a manner that, from a virtual state in which the laser is irradiated to all of the intersections of the XY lattice, the irradiation points are thinned out in accordance with a second thinning regularity that is different from the first thinning regularity.

22. 19. The method for manufacturing a spectacle lens according to claim 18, wherein the fluctuation range of the value of (minimum width+maximum width) / 2 at each of the laser irradiation points in the first region and the second region is within 20%.

23. The method for manufacturing eyeglass lenses according to claim 17, wherein the drawing data corresponds one processing spot by laser irradiation to one pixel of the image data.

24. The method for manufacturing eyeglass lenses according to claim 17, wherein the drawing data corresponds a plurality of processing spots by laser irradiation to one pixel of the image data.

25. The method for manufacturing eyeglass lenses according to claim 17, wherein the drawing data corresponds to one pixel of the image data with a plurality of processing spots formed by laser irradiation, the processing spots being partially overlapped with one another.

26. The method for manufacturing a spectacle lens according to claim 17, wherein the laser is an ultrashort pulse laser having a pulse width of 10 femtoseconds or more and less than 100 picoseconds.

27. An optical element, A substrate; an optical interference layer having a laminated structure provided on a surface of the substrate; and The surface of the optical member on which the optical interference layer is provided is a first region in which removed portions, in which at least one layer of the optical interference layer is locally removed, are arranged with a first regularity, and a non-removed portion, in which the layer is not removed, exists between the removed portions; a second region which is a region in which the removed portions are arranged with a second regularity or a region consisting of the non-removed portions; and the first region and the second region are visually recognized as regions of different color tones, An optical member that satisfies any one of the following (1) to (3): (1) In a plan view of the eyeglass lens, the minimum unit of repetition of the removed portions in the first region is a plurality of dot-shaped removed portions connected to each other, and the non-removed portions in the first region surround each of the removed portions, or (2) the non-removed portion of the first region is surrounded by the removed portion; or (3) The non-removed portion of the first region is a combination of (1) and (2).

Images