Eyeglass lens, eyeglasses, method for manufacturing an eyeglass lens, and optical member

Abstract

An eyeglass lens having a surface on the object side and a surface on the eyeball side, comprising a lens substrate and an optical interference layer having a laminated structure provided on at least one of the surfaces of the lens substrate. Among the surfaces of the eyeglass lens on which the optical interference layer is provided, at least one surface is a first region in which removal portions where at least one layer of the optical interference layer is locally removed are arranged with a first regularity, and non-removal portions where the one layer is not removed exist between the removal portions; and a second region which is a region where the removal portions are arranged with a second regularity or a region composed of the non-removal portions. The first region and the second region are visually recognized as regions having different color tones, and an eyeglass lens and related technologies thereof are provided.

Description

Technical Field

[0001] This specification is considered to describe all the contents of Japanese Patent Application No. 2023-223197. The contents not described in this specification can be referred to from the description of Japanese Patent Application No. 2023-223197.

[0002] The present disclosure relates to spectacle lenses, spectacles, a method for manufacturing spectacle lenses, and optical members.

Background Art

[0003] Spectacles are generally well-known and are used to correct the vision of a wearer through spectacle lenses or to protect the eyes from strong light rays. Therefore, it has been difficult to decorate spectacle lenses so as not to obstruct the wearer's field of view.

[0004] On the other hand, in Patent Document 1, as a permanent visible marking of an optical product, typically a spectacle lens, coated with a multilayer interference coating, it has been proposed to mark a spectacle lens by partially removing some of the layers formed on the spectacle lens using a marking machine with a laser beam.

Prior Art Documents

Patent Documents

[0005]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0006] According to FIGS. 8 and 9 of the above Patent Document 1, an optical product including a marking pattern in which an interference coating is locally lacking in accordance with the shape of a predetermined character is obtained. In other words, the spectacle lens shown in Patent Document 1 is composed of two types of portions: a portion where the interference coating is locally removed and a portion where it is not (a portion where the interference coating exists intact). This means that there are only two types of color tones when a third party (a person other than the person wearing the lens, an observer) views the spectacle lens in the worn state from the object side surface.

[0007] In one embodiment of the present invention, in a spectacle lens in which a local partial removal of an optical interference layer is employed, one problem is to increase the variation in color tone compared to the prior art. From another perspective, it is an object of the present invention to provide a spectacle lens, spectacles, and a method for manufacturing a spectacle lens, etc., which enable not only technical or commercial markings but also decoration of a desired design such as characters, symbols, patterns, etc. to be applied to the lens, and which are decorated with a higher degree of freedom and richer expression.

Means for Solving the Problems

[0008] In a spectacle lens, by locally removing at least a part of the thin films constituting the laminate structure provided on the surface of the optical interference layer, the light reflection characteristics generated in the removed portion can be changed with respect to the non-removed portion.

[0009] Here, in such removal, while regularly (preferably repeatedly) arranging a removal portion A where at least one layer of the optical interference layer is locally removed, a non-removed portion B where the one layer is not removed is made to exist between the removal portions. As a result, the inventor has found that a color tone γ different from both the color tone α of the region composed only of the removal portion A where the optical interference layer is locally removed and the color tone β of the region composed only of the non-removed portion B where the optical interference layer exists intact can be realized.

[0010] FIG. 11 is a schematic cross-sectional view of a spectacle lens showing a state in which neither color tone α nor color tone β but color tone γ is visually recognized when the wearer views the spectacle lens in the worn state.

[0011] As shown in FIG. 11, when the removal portion A and the non-removal portion B are regularly arranged adjacent to each other alternately, the reflected light A' from the removal portion A and the reflected light B' from the non-removal portion B are integrated and enter the viewer's pupil. As a result, the color tone γ, which is a mixed color (for example, light blue) of the color of the light brought about by the reflected light A' of the removal portion A (for example, a metallic color close to gold, color tone α) and the color of the light brought about by the reflected light B' of the non-removal portion B (for example, blue, color tone β), is visually recognized by the viewer. Based on this finding, the following solution has been found for the above-described problem.

[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 of the surfaces of the lens substrate, and having at least one of the surfaces of the spectacle lens on which the optical interference layer is provided is a first region in which removal portions where at least one layer of the optical interference layer is locally removed are arranged with a first regularity, and non-removal portions where the one layer is not removed exist between the removal portions, a second region which is a region where the removal portions are arranged with a second regularity or a region composed of the non-removal portions, and having the spectacle lens in which the first region and the second region are visually recognized as regions having different color tones.

[0013] The second aspect is the spectacle lens according to the first aspect, wherein the color tone includes at least any one of light and shade of color, gradation of color, light and shade due to differences in the amount of reflected light, and strength and weakness of the way of shining generated in the region.

[0014] The third aspect is In the first region, the color tone is single, The spectacle lens according to any one of aspects 1 to 2, wherein the color tone is single in the second region.

[0015] A fourth aspect is The optical interference layer having the 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 spectacle lens according to any one of aspects 1 to 3, wherein the removal portion is formed by partially removing the outermost low refractive index layer of the multilayer structure.

[0016] A fifth aspect is The first region, A second region in which the removal portions are arranged with a second regularity, And having The spectacle lens according to any one of aspects 1 to 4, wherein the arrangement modes of the removal portions in the first region and the second region are different from each other.

[0017] A sixth aspect is The spectacle lens according to any one of aspects 1 to 5, wherein the first regularity is a mode in which the removal portions are repeatedly arranged in at least one direction.

[0018] A seventh aspect is In a plan view of the spectacle lens, the minimum unit of repetition of the removal portions in the first region is one dot-shaped removal portion, and in 80% or more of the number of dots in the first region, the value of (minimum width + maximum width) / 2 in each of the dot-shaped removal portions varies within a range of 20% in the first region. The spectacle lens according to any one of aspects 1 to 6.

[0019] An eighth aspect is In a plan view of the spectacle lens, the minimum unit of repetition of the removal portions in the first region is a plurality of dot-shaped removal portions connected to each other. The spectacle lens according to any one of aspects 1 to 7.

[0020] A ninth aspect is The non-removal part of the first region is the spectacle lens according to any one of Aspects 1 to 8, which surrounds each of the removal parts, or is surrounded by the removal parts, or is a combination thereof.

[0021] Aspect 10 is In a plan view of the spectacle lens, when the mutually perpendicular directions are defined as the X direction and the Y direction, and a combination of a straight line arranged at equal intervals in the X direction and a straight line arranged at equal intervals in the Y direction is defined as an XY lattice, the same XY lattice is adopted for the first region and the second region, and each of the removal parts in the first region and each of the removal parts in the second region include only one intersection of the XY lattice, and the spectacle lens is the spectacle lens according to any one of Aspects 1 to 9.

[0022] Aspect 11 is In a plan view of the spectacle lens, the removal parts in the first region are thinned out according to a first thinning-out regularity from a virtual state in which removal parts are formed at all intersections of the XY lattice, the removal parts in the second region are thinned out according to a second thinning-out regularity different from the first thinning-out regularity from a virtual state in which removal parts are formed at all intersections of the XY lattice, and the spectacle lens is the spectacle lens according to any one of Aspects 1 to 10.

[0023] Aspect 12 is The first regularity includes a rule of the center-to-center distance between the removal parts in one direction G in the first region, The second regularity includes a rule of the center-to-center distance between the removal parts in one direction G in the second region, and the spectacle lens is the spectacle lens according to any one of Aspects 1 to 11.

[0024] Aspect 13 is In a plan view of the spectacle lens, the center-to-center distance between adjacent removal parts in one direction H in the first region is T times the center-to-center distance between adjacent removal parts in the same direction H in the second region. The spectacle lens according to any one of Aspects 1 to 12, wherein 0.9*m / n ≦ T ≦ 1.1*m / n (where m and n are natural numbers).

[0025] Aspect 14 is The spectacle lens according to any one of Aspects 1 to 13, wherein the second region consists only of the removed portion.

[0026] Aspect 15 is The spectacle lens according to any one of Aspects 1 to 14, wherein the visual transmittance of both the first region and the second region is 80% or more.

[0027] Aspect 16 is The spectacle lens according to any one of Aspects 1 to 15, wherein the maximum width of the removed portion is 200 μm or less.

[0028] Aspect 17 is A pair of glasses comprising a spectacle frame and a spectacle lens after spherical processing having an object-side surface and an eyeball-side surface, wherein the spectacle lens is the spectacle lens according to any one of Aspects 1 to 16.

[0029] Aspect 18 is A method for manufacturing a spectacle lens having an object-side surface and an eyeball-side surface, 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, with respect to at least one of the surfaces on which the optical interference layer is provided, A first region in which removed portions where 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 where the one 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, are formed, A method for manufacturing spectacle lenses, wherein the first region and the second region are visually recognized as regions having different color tones.

[0030] A nineteenth aspect is a step of creating drawing data including locations where a laser is to be irradiated on a 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 while scanning a laser beam with a laser irradiation device using the drawing data to form the removal portion, and has the optical interference layer having the 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 removal portion is formed by partially removing the low refractive index layer on the outermost surface of the multilayer structure, and is a method for manufacturing spectacle lenses according to the eighteenth aspect.

[0031] A twentieth aspect is the first region, a second region in which the removal portions are arranged with a second regularity by laser irradiation, are formed, and the arrangement pattern of the removal portions in the first region and the second region is made different from each other, and is a method for manufacturing spectacle lenses according to any one of the eighteenth to nineteenth aspects.

[0032] A twenty-first aspect is when the mutually perpendicular directions are defined as the X direction and the Y direction, and a combination of a straight line arranged at equal intervals s in the X direction and a straight line arranged at equal intervals t in the Y direction is defined as an XY lattice, the drawing data is data including at least XY coordinates, based on the relationship between the total light amount of laser irradiation and the degree of damage to the lower layer after the high refractive index layer, the minimum center-to-center distance x0 between the central locations of laser irradiation, which indicates the degree of overlap of laser irradiation locations in the X direction, is set so as to suppress the occurrence of damage, and the minimum center-to-center distance x0 is set to the equal interval s, The minimum center-to-center distance y0 between the central locations of laser irradiations, which indicates the degree of overlap of the laser irradiation locations in the Y direction, is set 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 grid is adopted in the first region and the second region. The method for manufacturing a spectacle lens according to any one of aspects 18 to 20, wherein each of the laser irradiation locations in the first region and each of the laser irradiation locations in the second region are set to include only one intersection of the XY grid.

[0033] Aspect 22 is the relationship between the degree of damage to the lower layer after the high refractive index layer and the total light amount of laser irradiation, 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 aspects 18 to 21, wherein the number of intersections of the XY grid arranged in a portion corresponding to one pixel of the image data in the drawing data is set.

[0034] Aspect 23 is The laser irradiation locations in the first region are arranged in a pattern in which the irradiation locations are thinned out according to a first thinning-out regularity from a virtual state in which all the intersections of the XY grid are irradiated with laser, The laser irradiation locations in the second region are arranged in a pattern in which the irradiation locations are thinned out according to a second thinning-out regularity different from the first thinning-out regularity from a virtual state in which all the intersections of the XY grid are irradiated with laser. The method for manufacturing a spectacle lens according to any one of aspects 18 to 22.

[0035] Aspect 24 is The method for manufacturing a spectacle lens according to any one of aspects 18 to 23, wherein the variation range of the value of (minimum width + maximum width) / 2 at each of the laser irradiation locations in the first region and the second region is within 20%.

[0036] Aspect 25 is The drawing data is the method for manufacturing a spectacle lens according to any one of Aspects 18 to 24, which corresponds to one processing spot by laser irradiation for each pixel of the image data.

[0037] Aspect 26 is The drawing data is the method for manufacturing a spectacle lens according to any one of Aspects 18 to 25, which corresponds to a plurality of processing spots by laser irradiation for each pixel of the image data.

[0038] Aspect 27 is The drawing data is the method for manufacturing a spectacle lens according to any one of Aspects 18 to 26, which corresponds to a plurality of processing spots by laser irradiation for each pixel of the image data, with the plurality of processing spots partially overlapping each other.

[0039] Aspect 28 is The laser is an ultrashort pulse laser with a pulse width of 10 femtoseconds or more and less than 100 picoseconds, and is the method for manufacturing a spectacle lens according to any one of Aspects 18 to 27.

[0040] Aspect 29 is An optical member, a base material, an optical interference layer having a laminated structure provided on the surface of the base material, and having The surface of the optical member where the optical interference layer is provided is a first region where at least one layer of the optical interference layer is locally removed and arranged with a first regularity, and a non-removed portion where the one layer is not removed exists between the removed portions; a second region which is a region where the removed portions are arranged with a second regularity or a region composed of the non-removed portions, and having The first region and the second region are optical members visually recognized as regions with different color tones from each other.

[0041] Another embodiment of the present disclosure is An eyeglass lens having a surface on the object side and a surface on the eyeball side, a lens substrate, and an optical interference layer having a laminated structure on either surface of the lens substrate, wherein at least one layer of the optical interference layer has a visible decorative portion formed by being locally removed, the decorative portion has a plurality of regions with different removal area ratios in plan view of the removed optical interference layer, the plurality of regions include a first region having a removal pattern in which the removal portions having a size of 200 μm or less are arranged with a first regularity, the plurality of regions are visually recognized as regions having different color tones, relates to an eyeglass lens.

[0042] In the above embodiment, the color tone preferably includes light and dark of color, shade of color, light and dark due to differences in the amount of reflected light generated in the region, or strength and weakness of the way of shining.

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

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

[0045] In the above embodiment, the visual 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 uppermost layer of the laminated structure.

[0047] One embodiment of the present disclosure relates to glasses including an eyeglass frame and a processed spherical eyeglass lens having a surface on the object side and a surface on the eyeball side, wherein the eyeglass lens is the eyeglass lens of the above embodiment.

[0048] One embodiment of the present disclosure is A method for manufacturing an eyewear lens, comprising processing an eyewear lens having a lens substrate and an optical interference layer having a laminated structure formed on the lens substrate to form a decorative part, 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 while scanning a laser beam by a laser irradiation device using the drawing data to form the decorative part, And having In the laser irradiation step, by locally removing at least one layer of the optical interference layer, a plurality of regions having different removal area ratios in plan view of the optical interference layer to be removed are formed, The plurality of regions include a first region having a removal pattern arranged with a first regularity with a removal part having a size of 200 μm or less as a minimum unit, The plurality of regions are visually recognized as regions having different color tones from each other, Relates to a method for manufacturing an eyewear lens.

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

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

[0051] In the above embodiment, preferably, in the drawing data, the pitch in the X direction and the Y direction of each processing spot 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 include a second region having a removal area ratio of 100% by arranging the removal parts without gaps.

[0053] In the above embodiment, the drawing data may correspond to one processing spot by laser irradiation for each pixel of the image data.

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

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

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

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

[0058] Another embodiment of the present disclosure is an optical member, including a substrate, and an optical interference layer having a laminated structure formed on the surface of the substrate, wherein at least one layer of the optical interference layer has a visible decoration part formed by being locally removed, the decoration part has a plurality of regions with different removal area ratios in plan view of the removed optical interference layer, the plurality of regions include a first region having a removal pattern in which the removal parts with dimensions of 200 μm or less are arranged with a first regularity as a minimum unit, the plurality of regions are visually recognized as regions having different color tones from each other, relating to an optical member.

[0059] The vicinity of the periphery of the spectacle lens is cut based on a predetermined frame shape, and the technical idea of the present invention is also reflected in the spectacles fitted into the spectacle frame.

[0060] Each of the embodiments described so far can be arbitrarily combined with each other.

Advantages of the Invention

[0061] According to an embodiment of the present disclosure, in a spectacle lens in which a partial removal of a local part of an optical interference layer is adopted, variations in color tone can be increased as compared with the conventional case. From another viewpoint, when decorating a desired design on a spectacle lens, it is possible to provide a spectacle lens, spectacles, a method for manufacturing a spectacle lens, etc. with a high degree of freedom.

Brief Description of the Drawings

[0062]

Figure 1

Figure 2

Figure 3

Figure 4

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Figure 6

Figure 7

Figure 8

Figure 9

Figure 10

Figure 11

Figure 12

Figure 13

Figure 14

BEST MODE FOR CARRYING OUT THE INVENTION

[0063] Hereinafter, embodiments according to the present disclosure will be described in detail with reference to the drawings as necessary. However, the present disclosure is not limited thereto, and various modifications are possible without departing from the gist thereof. In the drawings, the same reference numerals are assigned to the same elements, and duplicate descriptions are omitted. Also, the 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 in the drawings are not limited to the illustrated ratios.

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

[0065] In this specification, "lens" includes spectacle lenses. A "spectacle lens" is a transparent body having an object side surface and an eyeball side surface and having a predetermined diopter (spherical diopter, astigmatism diopter, etc.) based on the prescription of the wearer (eyeglass user). Usually, it has a spherical, aspherical or progressive surface as the surface shape. In addition to glasses for correcting refractive abnormalities of users, lenses having functions such as polarization, light adjustment, and wavelength filter for cutting a predetermined wavelength are also included in the lenses. In this specification, it refers to an uncut lens before button polishing, or a lens after button polishing (processed lens).

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

[0067] When placing the spectacle lens on a stand, the surface on the object side or the surface on the eyeball side is positioned in the upward direction of the vertical. Therefore, when discussing the configuration of each surface of the spectacle lens, it is assumed that it is in a plan view.

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

[0069] When viewed from the wearer's side (i.e., when viewed from the viewer), the right - hand side is the +X - direction, the left - hand side is the -X - direction, the upper side is the +Y - direction, the lower side is the -Y - direction, the object - side direction is the +Z - direction, and the opposite direction (the back - side direction) is the -Z - direction. The front - side direction and the back - side direction are related to the light beam passing through the pupil center. Although it is necessary to consider the XY coordinates strictly during peripheral vision, in this specification, for the convenience of explanation, they are defined as above. In this specification, "plan view" refers to the state when viewed from the +Z - direction to the -Z - direction.

[0070] [Spectacle lens] One aspect of the present embodiment is a spectacle lens having an object - side surface and an eyeball - side surface, comprising a lens substrate, an optical interference layer having a laminated structure provided on at least one surface of the lens substrate, and having, Of the surfaces of the spectacle lens on which the optical interference layer is provided, at least one surface is a first region in which removal portions where at least one layer of the optical interference layer is locally removed are arranged with a first regularity, and non - removal portions where the one layer is not removed exist between the removal portions; a second region which is a region where the removal portions are arranged with a second regularity or a region composed of the non - removal portions, and having, The first region and the second region are visually recognized as regions having different color tones, regarding the spectacle lens.

[0071] According to an embodiment of the present disclosure, in a spectacle lens in which local partial removal of the optical interference layer is adopted, the variation in color tone can be increased compared with the conventional case. From another perspective, when decorating a spectacle lens with a desired design, it is possible to provide a spectacle lens, spectacles, a method for manufacturing a spectacle lens, etc., with a high degree of freedom.

[0072] <Outline of the configuration of the spectacle lens> FIG. 1 is a schematic front view of a spectacle lens according to the present embodiment. Further, FIG. 2 shows a schematic front view of a spectacle lens in another embodiment. The spectacle lens 1 according to the present embodiment has a decorative part that can be visually recognized from at least the object side surface and includes a plurality of regions as described above. In FIG. 1, the decorative part includes a decorative part X1 and a decorative part X2, and in FIG. 2, the decorative part includes a decorative part X3.

[0073] The "decorative part" in this specification is a part including a removed part where at least one layer of the optical interference layer is locally removed, and at least the first region corresponds to it. When the second region is a region where the removed parts are arranged with a second regularity, the second region also corresponds to the decorative part.

[0074] The spectacle lens according to the present embodiment has an object side surface and an eyeball side surface. The "object side surface" is the surface located on the object side when the spectacles equipped with the spectacle lens are worn by the wearer. The "eyeball side surface" is the opposite, that is, the surface located on the eyeball side when the spectacles equipped with the spectacle lens are worn by the wearer. Generally, the object side surface is a convex surface and the eyeball side surface is a concave surface, that is, the spectacle lens is a meniscus lens. This is the same for an uncut lens before ball milling and a spectacle lens (lens after processing) after ball milling in which the periphery is cut according to the shape of the spectacle frame. The content described in this paragraph also applies to the lens substrate that is the basis of the spectacle lens (the lens body before forming the hard coat film or the antireflection film). That is, the lens substrate also has an object side surface and an eyeball side surface.

[0075] An optical interference layer having a laminated structure may adopt a known one. A specific example thereof will be described later. The optical interference layer may be provided on the surface of the spectacle lens provided with a removal portion, and of course, it may be provided on both surfaces of the spectacle lens.

[0076] The decorative portion may be formed on either surface of the spectacle lens. Further, it is visible from the surface on the object side, and it is preferably also visible from the surface on the eyeball side. Here, visible means that the light (such as sunlight and illumination light) incident on the decorative portion is reflected by the decorative portion and can be visually recognized when it enters the pupil of a third party (a person other than the wearer). In order to be significantly visible, the decorative portion preferably has a predetermined high reflectivity and is a smooth surface like a mirror surface that can reflect incident light specularly. This point will be further described later. In this specification, a case where an optical interference layer is provided on both surfaces of the spectacle lens and a removal portion is provided only on the surface on the eyeball side will be exemplified.

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

[0078] Further, the spectacle lens 1 according to the present embodiment has a removal portion A in which at least one layer of the laminated structure of the optical interference layer is removed, and a non-removal portion B that does not correspond to the removal portion A. As shown in the enlarged views of the decorative portions X1 and X2 at the lower part of FIG. 1, each of the region x1 corresponding to the decorative portion X1 and the region x2 corresponding to the decorative portion X2 has a removal portion A in which at least one layer of the laminated structure of the optical interference layer is removed, and a non-removal portion B that is not so. Further, as shown in the enlarged view of the decorative portion X3 at the lower part of FIG. 2, each of the regions x31, x32, and x33 constituting the decorative portion X3 has a removal portion A in which at least one layer of the laminated structure of the optical interference layer is removed, and a non-removal portion B that is not so.

[0079] Since at least one layer of the laminated structure of the optical interference layer is removed from the removal portion A with respect to the non-removal portion B, the removal portion A and the non-removal portion B have different optical characteristics. Due to the difference in the optical characteristics between the removal portion A and the non-removal portion B, there is a difference in the appearance when a third party views the spectacle lens in the worn state from the object side surface in the removal portion A and the non-removal portion B. In the spectacle lens 1 according to the present embodiment, a decorative portion is formed by utilizing the fact that the appearance when viewed by a third party is different in the removal portion A and the non-removal portion B. That is, on a spectacle lens having an optical interference layer having a laminated structure in which a low refractive index layer and a high refractive index layer are laminated, a removal portion A in which at least a part of the low refractive index layer or the high refractive index layer of the optical interference layer does not exist is formed, thereby forming a decorative portion on the surface of the spectacle lens with a desired character, symbol, pattern, or the like.

[0080] Among the surfaces of the spectacle lens on which the optical interference layer is provided, at least one surface (for example, the surface on the eyeball side, the same hereinafter) has a first region and a second region. The first region and the second region are collectively also referred to as "a plurality of regions". This plurality of regions may include regions equivalent to the first region or the second region, and also include a third region, a fourth region, a fifth region,... which will be described later as a modification example.

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

[0082] As used herein, "regularity" means that, as shown in FIGS. 1 to 4 and FIG. 12, the removal portions are arranged according to a rule with at least a predetermined one direction (for example, the X direction and / or the Y direction). As this rule, it is exemplified that the removal portions are repeatedly arranged at a constant period in the one direction. For example, when the intersections of the XY lattice in FIG. 12 are named intersections 1, 2, 3, and 4 in order when viewed in the X direction, a rule of arranging a removal portion at intersection 1, not arranging a removal portion at intersection 2, arranging a removal portion at intersection 3, and not arranging a removal portion at intersection 4 can be cited. Of course, a rule of arranging a removal portion at intersection 1, arranging a removal portion at intersection 2, not arranging a removal portion at intersection 3, and not arranging a removal portion at intersection 4 may also be acceptable.

[0083] Note that this "repetition" is "repetition" in a broad sense. For example, even when the center-to-center distances of adjacent removal portions do not exactly match but are arranged in a similar pattern in one direction with non-removal portions interposed therebetween, it may be included in this repetition.

[0084] The "removal portion" as used herein is also referred to as a "dot" in this specification and as a "spot" during laser irradiation. It refers to a portion having the same shape as one processing spot per pulse. When the removal portions overlap in a plan view, they are also referred to as a connected body.

[0085] The "center-to-center distance of the removal portions" refers to the distance between the centers of gravity of the dots when the centers of gravity in a plan view of adjacent removal portions (dots, spots) are taken as the center. This center-to-center distance is also referred to as the "pitch" in this specification. When the plan view shape of the removal portion is a perfect circle or an ellipse, the "center-to-center distance of the removal portions" refers to the center-to-center distance as the name implies.

[0086] Preferably, the first regularity includes a rule regarding the center-to-center distance between the removal portions in one direction G in the first region. Preferably, the second regularity includes a rule regarding the center-to-center distance between the removal portions in one direction G in the second region. Preferably, the two rules are different from each other. On the other hand, as described above, although the center-to-center distances of the removal portions adjacent to each other do not exactly match, they may be arranged in a similar pattern in one direction and in a different pattern in another direction. For example, in regions (2) and (3) of FIG. 12 to be described later, they have the same pattern in the X direction but different patterns in the Y direction. Therefore, the present embodiment is not limited to the first and second regularities being different regularities in a predetermined one direction. In any case, regardless of the rule regarding the center-to-center distance, if the first regularity and the second regularity are different in some way, they are visually recognized as regions with different color tones in the first region and the second region.

[0087] "The non-removal portion exists between the removal portions" mainly has two cases. One is a case where the removal portion A surrounds the non-removal portion B as in region x1 of FIG. 1. In this case, when region x1 is recognized as an island-in-sea structure, the non-removal portion B is the island and the removal portion A is the sea. The other is a case where the non-removal portion B surrounds the removal portion A as in region x2 of FIG. 1. In this case, when region x1 is recognized as an island-in-sea structure, the removal portion A is the island and the non-removal portion B is the sea. Both cases are collectively referred to in this specification as "the non-removal portion exists between the removal portions".

[0088] The second region is any of the following. (1) A region where the removal portions are arranged with a second regularity (2) A region composed of non-removal portions

[0089] (1) means that the second region includes removal portions. The second regularity at that time is not limited as long as it is different from the first regularity in any aspect (for example, the center-to-center distance, the arrangement pattern of the removal portions, etc.). Otherwise, the description of the first regularity above can be applied. In this specification, the arrangement pattern of the removal portions is also referred to as the removal pattern or simply the pattern.

[0090] (1) is not limited to the case where the non-removal part exists between the removal parts. That is, in the second region, it may be a full-surface removal part without leaving a non-removal part. This full-surface removal part is also referred to as a "solid pattern" in this specification.

[0091] (2) means that the second region does not include a removal part. In the case of (2), when the viewer visually recognizes the spectacle lens, the color tone γ which is a mixed color (for example, light blue) described in [Means for Solving the Problems of the Invention] and the color of the light brought about by the reflected light B' of the non-removal part B (for example, blue in the case of a blue cut lens, color tone β) are visually recognized. Even if the color of the light brought about by the reflected light A' of the removal part A (for example, a metallic color close to gold, color tone α) is not visually recognized by the viewer, the color tone β and the color tone γ are visually recognized by the viewer.

[0092] It was not known before the filing of this application that the color tone γ is exhibited in a spectacle lens in which a partial local removal of the optical interference layer is adopted. Also, even when looking at the first region alone that brings about the color tone γ, there is a high degree of freedom in changing from the color tone γ by changing the regularity of the arrangement of the removal part A. The degree of freedom of this change will be described later, but it is a significant degree of freedom together with the degree of freedom of decoration (adornment) referred to in this specification.

[0093] Therefore, even in the case of (2), there is no change in that the variation of the color tone can be increased compared with the conventional case in the spectacle lens in which a partial local removal of the optical interference layer is adopted, which is an effect of the present invention. The same can be said for the case of the solid pattern in (1) above regarding the ability to increase the variation of the color tone in the spectacle lens in which a partial local removal of the optical interference layer is adopted compared with the conventional case. In view of the content described in this paragraph, the technical idea of the present invention is also reflected in the spectacle lens that defines only the first region. Therefore, the spectacle lens and its related technology can also be one invention.

[0094] By adopting the above configuration, the first region and the second region are visually recognized as regions having different color tones.

[0095] As used herein, "color tone" mainly refers to the appearance including the light and darkness of a color, the shade of a color, the light and darkness (difference) due to the intensity (difference) of the reflected light amount, or the intensity of the glow. Different color tones mean that for a viewer with normal visual ability, any of these appearances is recognized as different. Furthermore, when the hue appears to change due to the difference in the removal area ratio, it is also included in the change in color tone referred to here. The change in color tone includes the change in appearance due to the change in lightness, hue, and chroma, which is expressed in the L*a*b* color space. For the L*a*b* color space, refer to pages 50 - 52 of the Official Text for Color Examination, Grade 1, supported by the Ministry of Education, Culture, Sports, Science and Technology, 3rd printing of the first edition, issued on February 14, 2022, by the Color Examination Association, a public interest incorporated foundation certified by the Cabinet Office.

[0096] As used herein, "the appearance when a third party (viewer) views the spectacle lens in the worn state from the object side surface" includes the appearance when the reflected light from the worn spectacle lens is received by the pupil of the third party. Specifically, it is the appearance at a relative position where a light source (such as sunlight or illumination light) in the wearer's environment enters the decorative part of the spectacle lens in the worn state, and the reflected light due to regular reflection can enter the pupil of the third party.

[0097] <Variations in Color Tone> In this embodiment, the variations in color tone can be further increased. For example, taking advantage of the high degree of freedom in changing from color tone γ as described above, the regularity of the arrangement of the removal part A may be changed to change the mixed color, for example, from light blue.

[0098] Regarding the regularity of the arrangement of the removal part A, a uniform regularity may be provided in both the X direction and the Y direction, or different regularities may be provided in both directions (for example, FIG. 12).

[0099] FIG. 12 is a schematic view in plan view of one surface of the spectacle lens according to the embodiment, showing removal portions arranged with various regularities. The broken lines indicate region units, and the XY grid is a virtual line. The XY grid will be described later. The white arrow indicates that the removal portions are arranged with a change in regularity from the region at the base of the white arrow to the region at the tip of the arrow. In this figure, all regions are formed on this surface, a common XY grid is adopted for the first region and the second region, and an example is shown in which each removal portion includes only one intersection of the XY grid.

[0100] Thus, in the technical idea of the present invention, regularity is an important element. That is, the arrangement pattern of a plurality of removal portions follows a predetermined rule (regardless of a constant pitch or a non-constant pitch), and the color tone of the region can be controlled according to the rule. One specific example of the rule is the XY grid, as shown in FIG. 12.

[0101] As described above, as shown in FIG. 12, regions that can provide various color tones can be formed on one surface of the spectacle lens. The above-described decorative portions may be provided on both surfaces of the spectacle lens.

[0102] Also, as shown in FIG. 12, regions composed of non-removal portions (regions outside the broken lines) may also be added to the variation of the color tone. The second region may also include a region composed of non-removal portions.

[0103] <One specific example and modification example of the configuration of the spectacle lens> In the spectacle lens 1, the decorative portion includes, in plan view of the optical interference layer, a plurality of regions in which the removal patterns formed by the removal portions A are different from each other. Such a plurality of regions correspond to the regions x1 and x2 in FIG. 1 and the regions x31, x32, and x33 in FIG. 2. In each of the plurality of regions, removal portions A that constitute an arbitrary removal pattern are formed in plan view of the optical interference layer.

[0104] The color tone of each region (x1, x2, x31, x32, x33) is single in both FIG. 1 and FIG. 2.

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

[0106] The pattern formed by the removal portion A can be made different from each other in each of a plurality of regions. That is, the plurality of regions can include a first region formed with a pattern in which the removal portion A is arranged with a first regularity, and other regions formed by arranging the removal portion A with a removal pattern different from the first removal pattern. In the other regions, the removal portion A may be formed with a pattern arranged with other regularities different from the first regularity. Each of the plurality of regions may be in contact with each other as shown in FIG. 2, or may be relatively separated as shown in FIG. 1. When the regions are in contact, the boundary where the pattern changes corresponds to the boundary of each region.

[0107] There is no limitation on the mode of contact of each region. For example, the first region may be surrounded by the second region, or there may be a plurality of the surrounded second regions. Conversely, the second region may be surrounded by the first region, or there may be a plurality of the surrounded first regions. This relationship is also applicable to the following third region, fourth region, fifth region,... which are regions equivalent to the first region or the second region.

[0108] Third regions, fourth regions, fifth regions,... which are regions equivalent to the first region or the second region may be provided. In the third region, the removal portions are arranged with a third regularity, in the fourth region, the removal portions are arranged with a fourth regularity, and in the third region, the removal portions are arranged with a fifth regularity. The first to fifth regularities are different from each other. The spectacle lens according to the present embodiment preferably includes the third region in addition to the first region and the second region, more preferably includes the fourth region, and still more preferably includes the fifth region.

[0109] The removal patterns formed by the removal part A are arranged according to a predetermined regularity. This pattern may be composed of units having a predetermined shape, and may be formed by regularly arranging units having a predetermined shape. Examples of this predetermined shape include dot-shaped (point-shaped) shapes. The shape of the dot is not particularly limited, and the specific shape may be a polygon such as a circle, an ellipse, a triangle, a quadrilateral, a pentagon, and a hexagon, or any other arbitrary figure. For the sake of convenience of explanation, in this specification, the case where the shape of the dot, that is, the shape of the laser processing (spot), is a circle will be exemplified.

[0110] <Removal area ratio and others> Hereinafter, the present embodiment focused on the removal area ratio, which is the ratio of the area occupied by the removal part in one region, will be described. Note that the content described in this item can be naturally combined with other descriptions in this specification.

[0111] To obtain the removal area ratio, the size of one region is defined. For example, take the region x33 in FIG. 2. As shown in the region x33, the total area of the removal parts (dots) at both ends in the X direction and the part sandwiched between the dots where a predetermined pattern is repeatedly arranged may be regarded as the size of one region. The total area of the removal parts (dots) at both ends in the Y direction and the part sandwiched between the dots where a predetermined pattern is repeatedly arranged may also be regarded as the size of one region.

[0112] In the region x31 of FIG. 2, when viewed in the +X direction (right direction), the repeating pattern ends halfway. In that case, it may be regarded as reaching halfway (for example, the boundary between the region x31 and the region x32 in FIG. 2). Conversely, when the repeating pattern does not appear even after passing through the original pitch when viewed in one direction, the removal part (dot) on the side of that one direction may be taken as the end (for example, the left end of the region 31). The content described in this paragraph is also applicable in the Y direction.

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

[0114] The spectacle lens on one side of the present embodiment has a decorative portion including a plurality of regions, and each of the regions has a removed portion where at least one layer of the laminated structure of the optical interference layer is removed. Further, at least one of the plurality of regions has a removal pattern formed by arranging with a predetermined regularity (referred to as the first regularity) with a removed portion having a size of 200 μm or less as a minimum unit (referred to as the first region).

[0115] The "minimum unit of repetition of the removed portion" (also referred to as the "minimum unit of the removed portion" or simply the "minimum unit") in this specification refers to one dot when the removed portions (dots) are not connected to each other (for example, (d) in FIG. 13). One dot, that is, one processing spot in one pulse, is also the minimum unit of processing and the minimum unit of drawing data. When the removal parts (dots) are connected to each other and the connected body is repeatedly arranged while sandwiching the non-removal part in the X direction and / or the Y direction (for example, (a)-(c) in Fig. 13), the "minimum unit of the removal part" in this specification refers to the connected body. In this case, for example, it applies when a single pixel, which is the minimum unit related to image data, is composed of a plurality of dots (details will be described later). In this case, for example, the connected body is repeatedly arranged in the X direction and / or the Y direction. In the area (Fig. (5)) surrounded by the broken line in the lower right of Fig. 12 shown later, two types of minimum units (a single dot and a connected body of two dots) exist, and regularity is realized by combining the two types of minimum units. When all the removal parts (dots) in one area are connected to each other, the "minimum unit" refers to a single dot.

[0116] Note that in the first area, even if all the removal parts (dots) are connected to each other, there is a non-removal part between the dots. On the other hand, in the second area, there may be a case where there is no non-removal part between the dots (so-called solid pattern). In all cases described in this paragraph, the minimum unit is a single dot.

[0117] Note that the minimum unit may be synonymous with the repeating unit in regularity, or may not be synonymous with the repeating unit in regularity as shown in the area (5) surrounded by the broken line in the lower right of Fig. 12 shown later.

[0118] Further, the plurality of regions have a region different from the first region (referred to as the second region), and the second region has a removal area ratio different from that of the removal area ratio in the first region. That is, the removal area ratio is different in each of the plurality of regions. Although details will be described later, in this embodiment, by adjusting the removal area ratio for each region, the visibility in each region is controlled, and it can be recognized as different color tones. Further, in at least one of the plurality of regions (for example, the first region), a removal portion having a size of 200 μm or less close to the resolution (resolution limit) of the human eye is used as a minimum unit, and a removal pattern formed by arranging these with a predetermined regularity is formed, thereby greatly improving the degree of freedom of decoration for the spectacle lens, and a desired design can be applied.

[0119] Here, in such removal, by adjusting the removal area ratio (hereinafter, also referred to as "removal area ratio") of the removal portion in the plan view of the optical interference layer in that region, when viewed as a decorative portion including such a removal portion, it is possible to express a plurality of regions distinguishable by the naked eye, or to express the shade or brightness of color, its gradual intermediate tone (hereinafter, also referred to as intermediate color tone), or gradation. This has been found by the present inventor.

[0120] In this embodiment, by adjusting the removal area ratio for each region, the visibility in each region is controlled, and it can be recognized as different color tones. Further, in at least one of the plurality of regions (for example, the first region), a removal portion having a size of 200 μm or less close to the resolution (resolution limit) of the human eye is used as a minimum unit, and a removal pattern formed by arranging these with a predetermined regularity is formed, thereby greatly improving the degree of freedom of decoration for the spectacle lens, and a desired design can be applied.

[0121] In this specification, the pattern of the removal portion A being "configured with a minimum unit of a size of 200 μm or less" means that among the representative lengths of the figures constituting the removal portion A, the length of the shortest portion is 200 μm or less. The representative length of a figure is the length for defining the dimensions of that figure. For example, for a circle, it is the diameter; for an ellipse, it is the lengths of the major axis and the minor axis; for a polygon, it is the length of the diagonal; and for a straight line, it is the length of the line and the line width. The minimum unit of the pattern of the removal portion A may correspond to the resolution of the image data and the minimum unit that can process the removal portion A in the manufacturing method of the spectacle lens described later. For example, when the removal portion A is formed by laser processing, the minimum unit is preferably substantially circular, and the spot diameter of the laser can correspond to the size of the minimum unit of the pattern of the removal portion A. The above "the length of the shortest portion is 200 μm or less" is defined based on the following viewpoints. If either the dimension in the X direction or the Y direction is 200 μm or less, the removal portion is small enough to be close to the resolution limit of the human eye. When the length of the longest portion is in the millimeter size range, there is a possibility that the removal portion can be visually recognized as a single entity, but when the removal portion is too thin, it cannot be visually recognized as a single entity. In any case, there is a high possibility that the color of the removal portion as a single entity cannot be distinguished. On the other hand, if a large number of removal portions are regularly arranged, the color tone as a surface can be visually recognized there. Note that instead of "the length of the shortest portion is 200 μm or less", a provision of "the length of the longest portion (maximum width) is 200 μm or less" may be adopted. Thereby, while a single removal portion is surely not recognized by the human eye, if a large number of removal portions are regularly arranged, the color tone as a surface can be visually recognized there. The "200 μm or less" described in this paragraph may further be "100 μm or less", or may be "70 μm or less".

[0122] In the spectacle lens of the present embodiment, the decorative part includes a plurality of regions, the regions have a removal pattern formed by removal parts, and by changing the removal area ratio in the removal pattern for each region, at least two regions distinguishable by visual recognition with different color tones may be formed. Although details will be described later, in this way, by adjusting the removal area ratio for each region, the visibility in each region is controlled, and by forming at least two regions in which regions having different color tones by visual recognition are distinguishable, the degree of freedom in decoration of the spectacle lens is improved.

[0123] In the second region, when the removal parts are arranged with a second regularity, that is, when it is not composed only of non-removal parts, it is preferable to make the arrangement modes of the removal parts different between the first region and the second region. The "arrangement mode" refers to the arrangement pattern of the centers of the removal parts when the first region and the second region are compared.

[0124] The pattern formed by the removal part A can form a stripe shape, a lattice shape, a combination thereof, etc. by arranging dot-shaped removal parts, and there is no limitation on the arrangement. It is only necessary that the removal part A is arranged with some regularity.

[0125] For example, the plurality of regions may include a second region in which the removal area ratio becomes 100% by arranging the removal part A without gaps.

[0126] From the viewpoint of facilitating the adjustment of the removal area ratio described later, the pattern of the removal part A is preferably composed of a plurality of dots and / or a plurality of straight lines. Note that for a pattern in which all of a predetermined region is the removal part A and there is no non-removal part B, it can also be said that a plurality of dots and / or a plurality of straight lines are arranged without gaps. Even in this case, it is a pattern obtained as a result of arranging the removal part A of one pixel as the minimum unit with a predetermined regularity. Also, the minimum unit may be discriminated from the pattern of the intermediate color tone. The pattern of the removal part A can be visually recognized by magnifying it using a microscope or the like.

[0127] For example, in the enlarged view shown at the bottom of FIG. 1, in regions x1 and x2, the removal portion A is composed of circular dots as constituent units. In regions x1 and x2, the dot pitches are designed to be different. In region x1, a pattern is formed such that each dot partially overlaps with an adjacent dot. As used herein, "adjacent" includes a state of contact where a part of the removal portion overlaps with another removal portion, and also includes a state where, even when the removal portions are not in contact with each other, when the removal portions are arranged with a predetermined regularity, the non-removal portion B and the solid pattern have a short separation distance such that they exhibit different color tones.

[0128] Also, in the enlarged view shown at the bottom of FIG. 2, in the decorative portion X3, regions x31, x32, and x33 having different patterns of the removal portion A are included adjacent to each other. In regions x31, x32, and x33, the dot pitches are designed to be different. In region x33, a pattern is formed such that each dot partially overlaps with an adjacent dot.

[0129] As described above, due to the difference in the optical characteristics (e.g., reflectivity) between the removal portion A and the non-removal portion B, there is a difference in the appearance when a third party views the mounted spectacle lens from the object side surface. However, if decoration is performed simply by forming only the removal portion A, a two-tone design of a decorated region composed only of the removal portion A and an undecorated region composed only of the non-removal portion B is formed.

[0130] On the other hand, in the present embodiment, by using a removal portion A with a size of 200 μm or less as a minimum unit and arranging the removal portions A of this size with a predetermined regularity, an intermediate tone region having a color tone different from both the region composed only of the removal portion A and the region composed only of the non-removal portion B can be made distinguishable. Thereby, in the present embodiment, the degree of freedom in decorating the spectacle lens can be increased.

[0131] The size of the minimum unit of the pattern of the removal part A (for example, dots 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, still 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. The size of the minimum unit of the pattern of the removal part A may be 60 μm or less, 50 μm or less, or 40 μm or less within the above range. By setting the size of the minimum unit within the above range, there is a tendency to be able to form a halftone more naturally. Also, the pattern of the removal part A can be formed more simply, and there is a tendency to be able to provide spectacle lenses with high productivity. This minimum size can be determined by the pixel size in the image data.

[0132] Furthermore, in the spectacle lens according to the present embodiment, the pattern of the removal part A has a plurality of regions with different area ratios (removal area ratios) occupied by the removal part A in the area occupied by the removal part A. In this way, by changing the area ratio occupied by the removal part A in the pattern of the removal part A for each region, the existence ratio of the removal part A and the non-removal part B for each region can be changed. Therefore, by adjusting the removal area ratio, the appearance of each region can be controlled. For example, by gradually increasing the removal area ratio from 0% to 100%, the decorative part can be gradually transitioned from the appearance of the region composed only of the non-removal part B to the appearance of the region composed only of the removal part A. As a result, the degree of freedom in decoration in the decorative part can be increased.

[0133] In this specification, the removal area ratio is the area ratio occupied by the total sum of the removal part A in the plan view of the optical interference layer in a predetermined region. The removal area ratio P A can be defined for each region having a certain pattern, and the area occupied by the removal part A in each region is S A and the area occupied by the non-removal part B is S B when it is obtained by the following formula. That is, the removal area ratio P A is defined as the ratio of the area occupied by the removal part A to the entire area of each region. P A = SA / (S A +S B )

[0134] In each of the plurality of regions constituting the decorative portion, the removal area ratio of the pattern of the removal portion A is not particularly limited and may be more than 0% and 100% or less. 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 within this range, and may be 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 a range defined by any of the above-described upper limit values and any of the above-described lower limit values, and may be, for example, 5% or more and 99% or less, 10% or more and 95% or less, or 20% or more and 90% or less.

[0135] The removal area ratios of the patterns of the removal portion A in each region can be different from each other, but the difference is not particularly limited. The difference in the removal area ratio between regions is preferably 1% or more and 98% or less, more preferably 2% or more and 95% or less, still more preferably 3% or more and 90% or less, even more preferably 5% or more and 85% or less, and particularly preferably 10% or more and 80% or less. The difference in the removal area ratio between regions may be 20% or more within the above range, or may be 70% or less. Also, in the plurality of regions, the difference in the removal area ratio 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% or more and 99% or less, more preferably 15% or more and 95% or less, still more preferably 20% or more and 90% or less. By setting the difference in the removal area ratio of the pattern of the removal portion A in each region within the above range, the difference in the appearance of each region can be made clearer.

[0136] As a general tendency, the higher the removal area ratio, the higher the visibility of the decorative portion. Specifically, this is because the amount of reflected light generated by the removal portion A increases. As the color tone of the reflected light, it is more likely to be visually recognized as brighter, or darker, or having stronger brilliance.

[0137] In each of the plurality of regions constituting the decorative part, the removal area ratio can be adjusted by appropriately designing the pattern of the removal part A. Fig. 3 shows a schematic diagram of the pattern of the removal part A formed by dots. In Fig. 3, (a) is an example of an intermediate tone pattern, and (b) is an example of a solid pattern. For example, when the pattern of the removal part A is constituted by dots, the removal area ratio can be adjusted by adjusting the dot density. Particularly when the dots are regularly arranged, the distance between the dots (the distance between the centers of gravity of the closest dots, hereinafter also referred to as "pitch") can be adjusted, or after setting the distance between the dots to a distance at which a solid pattern can be formed, the dots can be thinned out from the solid pattern, etc., to adjust the dot density and thus adjust the removal area ratio.

[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 of thinning out a part of the laser irradiation points in the second region (for example, region x1 → region x2 in Fig. 1). As a result, in the plan view of the spectacle lens, the removal part of the first region may be arranged in accordance with the first regularity by thinning out a part of the removal part of the second region. This "before and after thinning out" is included in the change of the "arrangement mode" mentioned above.

[0139] Also, when the pattern of the removal part A is constituted by straight lines, the removal area ratio can be adjusted by adjusting the distance between the straight lines in the substantially parallel straight lines.

[0140] Also, when the removal part A is formed by laser processing, as shown in Fig. 4, it is preferable that the minimum unit is a circle, and the spot diameter of the laser can correspond to the size of the minimum unit of the pattern of the removal part A. Note that Fig. 4 is an observation image when the removal part A is formed by laser processing, the circular dots correspond to the removal part A, and the periphery of the dots corresponds to the non-removal part B.

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

[0142] In FIGS. 1 and 2, the removal area ratio of the removal portion A is adjusted by adjusting the dot density. In FIG. 1, by making the removal area ratio of the region x1 higher than that of the region x2, the appearances of the decorative portions X1 and X2 are made different. Specifically, the decorative portion X1 is made into a decoration with a darker reflection color, or a higher amount of reflected light, or a stronger glow. Also, in FIG. 2, by gradually increasing the removal area ratios in the regions x31, x32, and x33 that constitute the decorative portion X3 in this order, the decorative portion X3 is made into a decoration with a gradation.

[0143] In the spectacle lens on another aspect of the present embodiment, if each region can be identified as a portion having a different color tone by visual recognition in a plurality of regions, it is not necessarily required that the pattern of the removal portion A be configured with a size of 200 μm or less as the minimum unit. For example, even if the minimum unit of the pattern of the removal portion A is more than 200 μm due to the design of the pattern of the removal portion A, an intermediate appearance between the region composed only of the removal portion A and the region composed only of the non-removal portion B can be realized.

[0144] Therefore, in the spectacle lens on another aspect of the present embodiment, it is sufficient that a plurality of regions include at least a first region and another region different from the first region, and the decoration corresponding to the first region and the decoration corresponding to the other region are configured to be distinguishable by visual recognition. Note that the difference in the appearance between the decorative portion corresponding to the first region and the decorative portion corresponding to the other region is caused by the difference in the removal area ratio in each region.

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

[0146] As shown in FIGS. 1 and 2, the spectacle lens 1 according to the present embodiment has a decorative part formed by a removed part in which at least one layer of the laminated structure of the optical interference layer is removed, and the reflectance of visible light in the removed part can be made higher than that in the non-removed part. Therefore, when looking at such a decorated lens, the decorative part can be visually recognized because the reflected light enters the eyes. Note that since the removed part has sufficient smoothness, specular reflection is dominant in the reflection of light incident on the removed part. On the other hand, since the reflected light due to specular reflection of the removed part hardly enters the eyes of the person wearing the glasses, the wearer hardly recognizes the decorative part. Furthermore, since the transmittance of the removed part is high, the wearer can clearly see the outside world with a sufficient field of view, just like a normal spectacle lens. That is, it does not interfere with the visual field of the spectacle wearer and can sufficiently maintain the function as glasses.

[0147] Therefore, in FIGS. 1 and 2, the decorative parts X1 to X3 may be present within the spectacle frame shape line 2. In the spectacle lens 1, since a design pattern can be formed within the spectacle frame shape line, a new design that did not exist in conventional glasses is created. From the same viewpoint, the decorative part may be present within a region having a radius of 30 mm from the lens center.

[0148] The formation of the decorative part to be described later can be performed by laser irradiation. The decorative part may be formed from either the object side surface or the spectacle side surface of the spectacle lens. And it is preferable that the decorative part can be visually recognized from either side. In this case, it is useful for the person who intends to wear the glasses to confirm the decoration of their own glasses. However, as described above, it is not recognized in the visual field of a person wearing glasses, and it does not obstruct the visual field.

[0149] In the spectacle lens according to the present embodiment, in a plan view, the ratio of the area of the decorative part to the entire spectacle lens may be 5% or more and 99% or less. That is, since it is difficult to obstruct the visual field of the spectacle wearer, even when the area where the decorative part is formed occupies a large ratio with respect to the entire spectacle lens, problems in wearing are less likely to occur.

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

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

[0152] When the lens substrate 11 is a finished lens (a lens with both optical surfaces formed), the spectacle lens 1 of the present embodiment includes a hard coat layer 12b provided on the surface 11b side of the lens substrate 11 on the eyeball side, an optical interference layer 13b provided on the surface 12bb side of the hard coat layer 12b on the eyeball side, and a water-repellent layer 14b provided on the surface 13bb side of the optical interference layer 13b on the eyeball side. Further, the spectacle lens 1 has a removal portion A in which at least a part of the optical interference layer is removed from the surface on the eyeball side or the object side (on the eyeball side in FIG. 5).

[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 the resin of 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 any of a flat surface, a convex surface, a concave surface, etc. The lens substrate may be used for any purpose such as a single-focus lens, a multi-focus lens, a progressive power lens, etc. For example, as an example, for a progressive power lens, usually, the near vision portion area (near vision portion) and the progressive portion area (intermediate area) are included in the aforementioned lower area, and the distance vision portion area (distance vision portion) is included in the upper area.

[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, still more preferably 0.5 mm or more and 3.0 mm or less, and still 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, still more preferably 1.55 or more, still more preferably 1.58 or more, and still more preferably 1.60 or more. From the viewpoint of enhancing the effect of improving the Abbe number by containing 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, and may be, for example, 1.80 or less.

[0158] (Hard coat layer) The spectacle lens according to the present embodiment may further have a hard coat layer in order to prevent the spectacle lens from being damaged. The hard coat layer is, for example, a cured film formed from a curable composition containing an inorganic oxide and a silicon compound. The curable composition may further contain a polyfunctional epoxy compound.

[0159] Examples of the inorganic oxide include silicon oxide, aluminum oxide, titanium oxide, zirconium oxide, tungsten oxide, zinc oxide, tin oxide, beryllium oxide, antimony oxide, and composite oxides composed 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 preferable. Note that colloidal silica may 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 still more preferably 25% by mass or more and 50% by mass or less in 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 the 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, a phenyl group, etc., and more preferably an organic group having an epoxy group. Note that the silicon compound may have an alkyl group bonded to silicon.

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

[0163] (Underlayer) As the above-mentioned underlayer, for example, it can be formed from an aqueous resin composition containing at least one kind of resin particle selected from the group consisting of a polyurethane resin, an acrylic resin, an epoxy resin, etc.

[0164] As the above aqueous resin composition, it is also possible to use commercially available aqueous polyurethane as it is or, if necessary, diluted with an aqueous solvent. Examples of commercially available aqueous polyurethanes include the "Evafanol" series manufactured by Nihon Kayaku Co., Ltd., the "Superflex" series manufactured by Dai-ichi Kogyo Seiyaku Co., Ltd., the "Adekabon Titer" series manufactured by ADEKA Corporation, the "Orestar" 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 "Sofuranate" series manufactured by Nippon Soflan Co., Ltd., the "Pois" series manufactured by Kao Corporation, the "Samplen" series manufactured by Sanyo Chemical Industries, Ltd., the "Izerax" series manufactured by Hodogaya Chemical Co., Ltd., and the "Neorets" series manufactured by Zeneca.

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

[0166] (Optical interference layer) The optical interference layer has a laminated structure. The optical interference layer is, for example, an antireflection film having 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 on the outermost layer of the multilayer structure. As a result, the high refractive index layer may be exposed in the removed portion. The number of layers of the antireflection layer is preferably 4 to 11 layers, more preferably 5 to 10 layers, and still 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 SnO as described in Example 1 of Patent Document 1 may be adopted. 2 of the laminated structure may be adopted.

[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 for the high refractive index layer is preferably at least one selected from the group consisting of zirconium oxide, tin oxide (SnO 2 ), indium tin oxide (ITO), tantalum oxide, yttrium oxide, titanium oxide, niobium oxide, and aluminum oxide, and 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 a conductive material such as tin oxide (SnO 2 ), indium tin oxide (ITO). By using a conductive material, an antistatic function can be imparted to the spectacle lens.

[0170] The optical interference layer may have a metal layer. The metal layer means a layer having a metallic color. The substance used for the metal layer is, for example, at least one selected from metals, or metal oxides, nitrides, carbides, and oxynitrides, and includes a substance having a metallic color. From the viewpoint of easy availability, it is preferably a metal. The metal species contained in the metal layer is, for example, at least one selected from Cr, Ta, Nb, Ti, and Zr. Also, the effect of preventing charging is exhibited by providing the metal layer. The metal layer may have one or more layers in the optical interference layer.

[0171] Examples of the configuration of the optical interference layer are shown in the following table. In the table, "No." is the number of each layer attached in the figure.

[0172]

Table 1

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

[0174] The optical interference layer can form an antireflection layer by alternately laminating a low refractive index layer and a high refractive index layer by a vacuum deposition method.

[0175] FIG. 6 is a front view of the spectacle lens according to the present embodiment. As shown in FIG. 6, the spectacle lens according to the present embodiment has a removal portion A and a non-removal portion B in a plan view with respect to the optical interference layer.

[0176] FIG. 7 is a schematic cross-sectional view of the spectacle lens according to the present embodiment. In FIG. 7, the optical interference layer 13f referred to in FIG. 5 is constituted by low refractive index layers 131a to d or high refractive index layers 132a to 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 removal portion A is a region where at least a part of the low refractive index layers 131a to d or the high refractive index layers 132a to d of the optical interference layer does not exist. The removal portion A is formed by removing at least a part of the low refractive index layer or the high refractive index layer of the optical interference layer. On the other hand, the non-removal portion B is a region where a part of the low refractive index layer 131 or the high refractive index layer 132 of the optical interference layer exists. The non-removal 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 the spectacle lens is usually designed such that the reflected light from the object-side surface, that is, the light incident from the object-side surface and reflected by the object-side surface, is reduced. Therefore, by removing at least one layer of the laminated structure of the optical interference layer, the reflectance (reflected light intensity) of the reflected light from the object-side surface changes, typically increasing the reflectance. That is, in the spectacle lens according to the present embodiment, the removed portion A has a different reflectance in the visible light region compared to the non-removed portion B, typically having a higher reflectance. Therefore, the decorative portion of the spectacle lens according to the present embodiment can enhance the visibility from a third party. In this specification, the "visible light region" refers to the region of wavelengths from 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 set to be at least twice the average reflectance of visible light in the non-removed portion B. This feature is preferably the same on either the side where the lens is formed or the opposite side.

[0178] (Water-repellent layer) The spectacle lens according to the present embodiment may further have a water-repellent layer on the surface layer 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 the hard coat layer or on the optical interference layer, but is preferably formed on the antireflection layer. And the water-repellent layer is preferably located on the outermost surface.

[0179] <Physical properties of the spectacle lens> In the present embodiment, with respect to the incident light from the object-side surface, the average reflectance R of the region composed of the non-removed portion B B to the average reflectance R of the region composed of the removed portion A A The ratio (R A / R B ) is preferably 1.5 or more, more preferably 2.0 or more, still more preferably 2.5 or more, and even more preferably 3.0 or more. The ratio (R A / R B ) has no particular upper limit, but may be, for example, 6.0 or less. Incidentally, the above are the numerical values when decoration is applied to the spectacle side surface of the spectacle lens. However, even when decoration is applied to the object side surface, it is preferable that the numerical values are within the same range.

[0180] Also, depending on the layer structure of the optical interference layer, the reflectance in a specific wavelength region band becomes relatively high for the spectacle lens, and there may be a slight difference in hue between the region composed of the removal part A and other regions. Therefore, by removing at least one layer of the laminated structure of the optical interference layer, the spectrum of the reflected light from the object side surface changes, and any one of the hue, lightness, and chroma of the reflected light may change. That is, in the spectacle lens according to the present embodiment, the removal part A has at least one of the hue, lightness, and chroma of the reflected light different from that of the non-removal part B. Therefore, the decorative part of the spectacle lens according to the present embodiment can enhance the visibility from a third party.

[0181] In the present embodiment, the wavelength with the highest reflectance in the reflection spectrum in the visible light region may be different between the region composed of the removal part A and the region composed of the non-removal part B.

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

[0183] In the spectacle lens according to the present embodiment, the visual transmittance T of the non-removal part B B with respect to the visual transmittance T of the removal part A A ratio (T A / T B ×100) is preferably 80% or more, more preferably 83% or more, still more preferably 85% or more. The ratio (T A / T B ×100) has no particular upper limit, but is, for example, 98% or less. The numerical value of T A is T BBy being within the above range, the wearer perceives transparency in all areas, hardly recognizes the difference in visual transmittance, and it becomes less likely to obstruct the wearer's field of vision.

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

[0185] In the spectacle lens according to this embodiment, the above average reflectance R B is preferably 10% or less, more preferably 5% or less, and still more preferably 3% or less. By designing the average reflectance R B to be low and forming the removal portion A, even a slight increase in reflectance makes it easier to visually recognize the difference from the non-removal portion B that serves as the background of the decoration. Also, the average reflectance R B may be 0.5% or more, 1.0% or more, or 1.5% or more. The average reflectance R 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 preferably higher than the average reflectance R B , preferably more than 3%, more preferably 4% or more, still more preferably more than 5%, even more preferably 6% or more, yet still more preferably 7% or more, and particularly preferably 8% or more. By the average reflectance R A being higher than the average reflectance R B , the visibility from the other person can be enhanced. By adjusting the design of the optical interference layer and ensuring the flatness of the processed surface of the removal portion A, the average reflectance R A can be within the above range. The average reflectance R AThe upper limit is not particularly limited, and for example, it may be 20% or less, 18% or less, or 15% or less. The average reflectance R 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] The above-mentioned visual transmittance T B is preferably 90% or more, more preferably 93% or more, still more preferably 95% or more, and even more preferably 97% or more. The visual transmittance T B By increasing it, it becomes more difficult to obstruct the wearer's field of vision. The visual transmittance T B The upper limit is not particularly limited, and for example, it is 99% or less.

[0188] The above-mentioned visual transmittance T A is preferably 80% or more, more preferably 82% or more. The visual transmittance T A By increasing it, it becomes more difficult to obstruct the wearer's field of vision. The visual transmittance T A The upper limit is not particularly limited, and for example, it may be 95% or less, 90% or less, less than 90%, or 89% or less. The visual transmittance T A may be 80% or more and 95% or less, 82% or more and 90% or less, 82% or more and less than 90%, or 82% or more and 89% or less.

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

[0190] By the average reflectance and the visual transmittance satisfying the above conditions, while enhancing the visibility of the decoration from the other person, it becomes more difficult to obstruct the wearer's field of vision.

[0191] [Method for manufacturing spectacle lenses] Hereinafter, the method for manufacturing the spectacle lens of the present embodiment will be described. For content not described below (for example, preferred examples), the content described in the above [Spectacle Lens] can be incorporated. Conversely, the content described below can be used as a preferred example for the above [Spectacle Lens]. In that case, the spot can be read as a dot or a removal part.

[0192] <Outline of the method for manufacturing a spectacle lens> The method for manufacturing the spectacle lens of the present embodiment includes 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 part. Further, the method for manufacturing the spectacle lens includes preparing image data corresponding to a desired decorative design (hereinafter sometimes referred to as step S1), and based on this, creating drawing data for laser processing (hereinafter sometimes referred to as step S2), and a laser irradiation step of forming the decorative part by irradiating the optical interference layer with a laser beam while scanning the laser beam by a laser irradiation device using the drawing data.

[0193] Designs such as characters, symbols, and patterns formed on the decorative part are configured as image data based on these desired designs. And it is preferable that the image data is binary data. Such image data has a pixel size determined by a predetermined resolution (pixel density dpi), and such a pixel size becomes the minimum unit constituting the image drawn on the lens.

[0194] Next, based on such image data, drawing data for use when processing by irradiating the optical interference layer with a laser beam such as a pulsed laser by a laser irradiation device is created. This is a step of creating drawing data including the planned laser irradiation locations on the surface where the optical interference layer is provided from the image data of the desired decorative design.

[0195] FIG. 8 and FIG. 9 are flowcharts showing an example of the procedure of a method for manufacturing an eyeglass lens according to the present embodiment. As shown in FIGS. 8 and 9, laser processing is performed on a predetermined portion of the eyeglass lens provided with an optical interference layer. This is a laser irradiation step of irradiating the optical interference layer with a laser beam while scanning the laser beam by a laser irradiation device using the drawing data to form the removal 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 laminated. The eyeglass lens may be formed with other layers such as a hard coat layer, an underlayer, and a water repellent layer as described above. Note that the frame cutting process along the contour of the spherical shape may be performed before the laser processing (see FIG. 8) or after the laser processing (see FIG. 9).

[0197] As shown in FIG. 8, in the case of performing the decoration process after the frame cutting, first, fixture blocking is performed to attach one optical surface of the eyeglass lens to be processed (specifically, the optical surface on which the decoration process described later is not performed) to a dedicated fixture (S101). Then, the blocked eyeglass lens is set in a spherical processing machine, and spherical processing (frame cutting) is performed on the eyeglass lens to cut the outer shape of the eyeglass lens into a frame shape (S102). Since the fixture blocking and the frame cutting process may be performed using known techniques, detailed description thereof is omitted here.

[0198] In the laser processing, while being blocked by a fixture, the lens height of the processing area (that is, the three-dimensional shape of the processing area on the processed surface) of the processed surface of the eyeglass lens to be processed (specifically, the surface on the unblocked side) is measured (S103). The measuring method is not particularly limited, and for example, a non-contact type three-dimensional measuring machine may be used. The processing area is an area including a laser scan area described later.

[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 of the processing area, laser processing is performed to irradiate the processing area with laser light, and raster scanning is performed to move the irradiation position of the laser light based on the previously prepared shape data (i.e., contour data of the spherical shape) (S104). Note that the raster scanning may be vector scanning. In this embodiment, prior to frame cutting, laser processing is performed on the spectacle lens based on the contour data of the frame shape, and a design pattern composed of a processed portion (removal portion A: incomplete optical interference layer) and an unprocessed portion (non-removal portion B: complete optical interference film) is formed.

[0200] After forming the design pattern by laser processing, jig deblocking is performed to remove the spectacle lens from the dedicated jig (S105), and lens cleaning is performed to remove residues and deposits (foreign substances) during laser processing on the removed spectacle lens (S106). Then, after the final lens appearance inspection (S107), the production of the spectacle lens is completed.

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

[0202] After measuring the lens height of the processing area, subsequently, laser processing is performed to irradiate the processing area with laser light, and raster scanning is performed to move the irradiation position of the laser light based on the previously prepared drawing data (S113). Instead of raster scanning, vector scanning may be used. As a result, laser processing is performed on the processing area of the processed surface of the spectacle lens.

[0203] After the formation of the design pattern (after laser processing), frame cutting is performed on the spectacle lens after the laser processing. That is, the blocked spectacle lens is set in a ball-shaped processing machine, and ball-shaped processing (frame cutting) is performed on the spectacle lens to cut the outer shape of the spectacle lens into a frame shape (S114). After the frame cutting, jig deblocking is performed to remove the spectacle lens from the dedicated jig (S115), and lens cleaning is performed to remove residues and attachments (foreign substances) during processing from the removed spectacle lens (S116). Then, after the final lens appearance inspection (S117), the production of the spectacle lens is completed.

[0204] <Setting of spot size (and thus the size of the removal part, dot)> Here, it is preferable that the manufacturing method of the present embodiment has a step of determining the diameter (hereinafter also referred to as the processing diameter) of one processing spot (hereinafter also referred to as a spot) by irradiation of a pulsed laser corresponding to one pulse of the pulsed laser according to the specifications of the apparatus and the performance of the optical system. This is the minimum unit of processing in the drawing when performing the removal processing of the optical interference layer. Thereby, the correspondence relationship between the pixel size of the image data and the spot size of the processing spot by irradiation of one pulse of the pulsed laser can be determined. If the processing diameter and the pixel size of the image data match, laser processing can be performed by associating one pixel of the image data with one pulse.

[0205] Each removal part in the first region and each removal part in the second region may have the same dimensions and the same shape, or may be different from each other. However, in view of the ease of processing, it is preferable that each removal part has the same dimensions and the same shape in each region rather than changing the shape and diameter of the laser during laser irradiation for each region.

[0206] The processing diameter per pulse can be made substantially constant for one laser processing (one job), that is, for the laser processing of one surface of the spectacle lens (here, the surface on the eyeball side). That is, in principle, processing spots with a constant pitch and a constant diameter may be applied, and the color tone may be changed according to their density, that is, the removal area ratio. By partially not forming the processing spots, that is, by increasing the rate of thinning out the processing spots, a region with a small removal area ratio may be formed.

[0207] However, for the decoration of the eyeball lens, since the surface to be processed is a curved surface by complex optical calculations, errors may occur in focusing by three-dimensional control during scanning. However, the occurrence of fluctuations in the spot size due to errors (for example, within ±20%, preferably within ±15%, about ±10%) does not affect the aesthetics of the formed decoration.

[0208] As a preferred example in the above paragraph, in the plan view of the spectacle lens, the minimum 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%, within 10%) in the first region. The reason for adopting (minimum width + maximum width) / 2 is the result considering that even if the laser is irradiated so that the irradiation location is a perfect circle in design, it may be an ellipse in the final spectacle lens.

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

[0210] The above-mentioned regulation of (minimum width + maximum width) / 2 may be adopted for 80% or more of all the dots in the first region and the second region. Preferably, it is 90% or more, 95% or more, 98% or more, 99% or more, 100%, and hereinafter, the "80% or more" described in this specification can be similarly replaced with this preferred numerical range. It may be configured such that the above stipulation of (minimum width + maximum width) / 2 is satisfied for 80% or more of all the dots within the first region. It may be configured such that the above stipulation of (minimum width + maximum width) / 2 is satisfied for 80% or more of all the dots within the second region.

[0211] The processing diameter of one pulse can be in the range of, for example, 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, and further 10 to 50 μm. The selection of the processing diameter affects the processing speed for decorating the desired design. Also, the pitch in the X and Y directions for forming the processing spot corresponding to one pulse can be in the range of 1 to 100 μm. Note that the drawing method may be raster scan or vector scan. Or, there is no particular limitation such as the pulse split method.

[0212] <One specific example of the conversion from image data to drawing data> The dot-shaped removal part can be composed of pixels (picture elements), which are the minimum units of the above image data, or may be composed of a plurality of them. And the minimum unit of each of the above removal parts formed on the lens surface is the pixel size, preferably with a dimension of 200 μm or less. This dimension is usually difficult to be resolved by the human eye. By determining an array with such regularity of fine dot-shaped removal parts based on a predetermined removal area ratio, regions with different color tones can be expressed in a plurality of regions.

[0213] Hereinafter, the image data and the drawing data will be described. In the manufacturing method of this embodiment, first, image data corresponding to a desired design is prepared. The image data can be binary data. There is no limitation on the format of the image data, and for example, it can be a BMP file. Here, the size of one pixel is determined by the resolution (pixel density) of the image data. For example, for image data with a resolution of 1000 dpi, one pixel is 25.4 μm. This is the minimum unit in the image data.

[0214] The resolution of the image data to be processed is not particularly limited. However, when high-definition decoration on the spectacle lens is desired, 300 dpi or higher is preferred. Also, when it exceeds 2000 dpi, the fineness further improves, but it is difficult for the human eye to recognize it as an added value.

[0215] How to allocate spots with respect to the resolution of the image may be done by using known image processing software (for example, Illustrator (registered trademark)). That is, when obtaining drawing data from the image data, how many pulses (a combination of how many spots in the X direction and how many spots in the Y direction) of processing are assigned to one pixel of the image data may be determined by the image processing software. At that time, by arranging the dots corresponding to one pixel regularly (uniformly dispersing them in a predetermined area), it becomes easier to exhibit the color tone of the predetermined area.

[0216] <Setting of the number of spots per pixel> FIG. 13 is an explanatory diagram showing the correspondence relationship of the processing spots by laser irradiation with respect to one pixel of the image data in the spectacle lens according to the embodiment. (a) is a diagram showing a state where a 3×3 removal part (the center distance between adjacent removal parts is x0' in both the X direction and the Y direction) in the XY lattice is connected and set to one pixel. (b) is a diagram showing a state where a 2×2 removal part (the center distance between adjacent removal parts is x0' in both the X direction and the Y direction) in the XY lattice is connected and set to one pixel. (c) is a diagram showing a state where a 2×1 removal part (the center distance between adjacent removal parts is x0'' which is smaller than x0') in the XY lattice is connected and set to one pixel. (d) is a diagram showing a state where one removal part 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 direction and the Y direction), one pixel of the image data can be subjected to laser processing corresponding to one pulse (FIG. 13(d)).

[0218] On the other hand, when the processing diameter of one pixel of the image data is not the same as that of one laser pulse, a plurality of pulses can be assigned to and arranged on one pixel for processing. Based on the minimum unit of the image data and the minimum unit of the drawing data, the correspondence between the two is set.

[0219] For example, a 2×2 spot is assigned to one pixel of the image data (Fig. 13(b)), or a 3×3 spot is assigned (Fig. 13(a)), and adjusted as appropriate.

[0220] The number of spots in the X and Y directions does not have to be the same. For example, while making one pixel slightly longer in the X direction as shown in Fig. 13(c), 2×1 spots may be assigned. At that time, in order to make one pixel closer to a square, the center-to-center distance between the spots may be set smaller. For example, it may be set narrower than the center-to-center distance between the spots in the case of a v×v spot (v is an integer of 2 or more) as shown in Figs. 13(a) and (b) (x0´´ < x0´ in Fig. 13).

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

[0222] When setting the pitch in the X and Y directions of adjacent spots, also consider the irradiation energy distribution (beam profile) and the characteristics of the design to be processed, etc., and create the drawing data by selecting an optimal combination for the number of spots and their arrangement (pitch in the X and Y directions). For example, consider that the processing strength of the overlapping part of the processing spots changes according to the irradiation energy distribution of one pulse. Therefore, depending on the beam profile, whether to overlap adjacent processing spots and the overlapping width in the case of overlapping can also be determined at this stage.

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

[0224] If one simply thinks that it is sufficient not to overlap, then when it is necessary to assign a plurality of spots to one pixel, the spots have to be overlapped, which contradicts this idea.

[0225] Therefore, investigating the upper limit of this degree of overlap (in a broad sense, what degree of overlap will not cause damage) and determining the minimum value that can be taken as the center-to-center distance of the spots is also one of the characteristic parts of this embodiment.

[0226] And based on that minimum value, setting a virtual XY grid on the surface where the removal part is provided on the spectacle lens and arranging spots at the intersections of the XY grid is also one of the characteristic parts of this embodiment.

[0227] One method of the above content is as follows.

[0228] "When the mutually perpendicular directions are the X direction and the Y direction, and a combination of a straight line arranged at equal intervals s (reference symbol s in FIG. 12) in the X direction and a straight line arranged at equal intervals t (reference symbol t in FIG. 12) in the Y direction is defined as an XY grid (vertical and horizontal lines in FIG. 12), the drawing data is data including at least XY coordinates (Z coordinate may be included), based on the relationship between the total light amount of laser irradiation and the degree of damage to the lower layer after the high refractive index layer, the minimum center-to-center distance x0 between the central positions of laser irradiation, which indicates the degree of overlap of the laser irradiation positions 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, the minimum center-to-center distance y0 between the central positions of laser irradiation, which indicates the degree of overlap of the laser irradiation positions 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, Adopt a common XY grid for the first region and the second region, and set each of the laser irradiation positions in the first region and each of the laser irradiation positions in the second region to include only one intersection of the XY grid.

[0229] The "relationship between the total light amount of laser irradiation and the degree of damage to the lower layer after the high refractive index layer" may be obtained in advance before implementing the method for manufacturing the spectacle lens according to the present embodiment.

[0230] Although this relationship is merely an example, it may be obtained as follows. For example, obtain a Gaussian distribution of the light amount according to the center-to-center distance of adjacent spots. If the various conditions of this preliminary test are the same as the various conditions when actually implementing the method for manufacturing the spectacle lens except for the center-to-center distance of the spots, more realistic test results can be obtained, which is preferable.

[0231] Observe the surface of the optical interference layer when the Gaussian distribution is obtained with a microscope or the like, and confirm whether damage has occurred and the degree of damage if it has occurred. Thereby, according to the center-to-center distance of adjacent spots, search for a distance where no damage occurs or a distance where damage is acceptable even if it occurs, and set it to one center-to-center distance.

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

[0233] It was previously stated that it is preferable to make the arrangement modes of the removal parts different from each other between the first region and the second region. As an example using the above XY grid, an example is to make the arrangement patterns of the spots at the intersections in the XY grid different from each other.

[0234] As previously described, the pattern formed by the removal part A can form stripes, grids, combinations thereof, etc. by arranging dot-shaped removal parts. The stripes or grids formed by the arrangement of the dot-shaped removal parts can be easily manufactured by using the virtual XY grid. At that time, by setting "each of the laser irradiation positions in the first region and each of the laser irradiation positions in the second region to include only one intersection of the XY grid", the removal parts can be arranged regularly, and it becomes possible to easily manufacture them whether they are in a stripe shape or a grid shape.

[0235] For example, each of the removal parts in the first region and each of the removal parts in the second region may be set to include only one intersection of the XY grid. Taking a familiar example in Japan, the dot-shaped removal parts may be arranged so that the go stones are placed only at the intersections of the vertical and horizontal lines of the go board.

[0236] This means that one step of the manufacturing method, which is performed on the intersection of a common XY grid for both the first region and the second region (for example, FIGS. 2 and 12), is reflected in the specific configuration of the manufactured spectacle lens. Although the case of not adopting a common XY grid for both is not excluded from the present invention, adopting a common XY grid for both is a preferred example.

[0237] Once it is determined whether to irradiate a laser at each intersection, the first region can be formed, and the manufacturing difficulty is reduced. This configuration is also followed in FIGS. 1, 3, and 4.

[0238] The regulation of arranging spots (removal parts, dots) at the intersections of the XY grid preferably satisfies 80% or more of all the dots in the spectacle lens.

[0239] Summarizing the above content, in the manufacturing method of the spectacle lens of the present embodiment, · Setting the desired diameter when using a pulsed laser (for example, one value between 20 and 25 μm) · After setting the laser diameter, set the center-to-center distance between the dots such that even if the irradiated spots (dots) are connected, the damage caused by the high light intensity at the connection part is within the allowable range. · Set the lattice interval based on the center-to-center distance (and thus set the arrangement of the lattice intersections). Based on the technical idea above, it is preferable to set the lattice interval.

[0240] In the plan view of the spectacle lens, even if the removal parts are thinned out according to the first thinning-out regularity from the virtual state where removal parts are formed at all the intersections of the XY lattices, the removal parts in the second region may be thinned out according to a second thinning-out regularity different from the first thinning-out regularity (for example, x33 → x32, x31 in FIG. 2). More specifically, the removal parts in the first region may be arranged according to the first regularity by thinning out a part of the removal parts in the second region. If the center-to-center distance is set at the upper limit of allowable damage, the lattice interval becomes narrower, the number of lattice intersections increases, and the degree of freedom in thinning out a part of the removal parts increases (the options for selecting intersections where no removal parts are arranged increase). The first thinning-out regularity leads to the establishment of the first regularity regarding the arrangement of the removal parts. Similarly, the second thinning-out regularity leads to the establishment of the second regularity regarding the arrangement of the removal parts.

[0241] Also, by presetting the XY lattice as described above during laser irradiation, in the plan view of the spectacle lens, the center-to-center distance between adjacent removal parts in one direction H in the first region is always T times (0.9*m / n ≦ T ≦ 1.1*m / n (where m and n are natural numbers)) the center-to-center distance between adjacent removal parts in the same direction H in the second region. 0.9 and 1.1 assume the fluctuation range. The above one direction H and the one direction G that appears in the regularity of the center-to-center distance may be the same direction or different directions from each other. In the case of different directions, one may be the X direction and the other may be the Y direction. Instead of 0.9, 0.8 (preferably 0.95, 0.99) may be adopted, or instead of 1.1, 1.2 (preferably 1.05, 1.01) may be adopted.

[0242] The regulation of the formula described in the above paragraph can be satisfied only because the minimum value of the center-to-center distance is adopted as the XY grid interval. The region x32 in FIG. 2 (n = 2 in the formula described in the above paragraph) and the region x33 (m = 3 in the formula described in the above paragraph) are an example that satisfies the relationship of the above formula. Also, when the region (1) surrounded by the upper left broken line in FIG. 12 to be described later is defined as the second region, there are multiple types of the center-to-center distance at the dots on the horizontal line (for example, s and 2s in the figure). When the region (2) on the right side of the region (1) surrounded by the upper left broken line is defined as the first region, the center-to-center distance becomes 3s (3s described in the figure). At this time, based on the center-to-center distance s, the center-to-center distance becomes (natural number 3) / (natural number 1), that is, 3 times, and based on the center-to-center distance 2s, the center-to-center distance becomes (natural number 3) / (natural number 2), that is, 1.5 times. Conversely, when the region (1) surrounded by the upper left broken line in FIG. 12 to be described later is defined as the first region and the region (2) on the right side of the region (1) surrounded by the upper left broken line is defined as the second region, based on the center-to-center distance 3s of the second region, the center-to-center distance s can be expressed as (natural number 1) / (natural number 3), that is, 1 / 3 times, and the center-to-center distance 2s can be expressed as (natural number 2) / (natural number 3), that is, 2 / 3 times.

[0243] When the density of the removal part in the first region is lower than that in the second region, the center-to-center distance of the first region is larger, and m > n. There is no limitation on the numerical values of m and n. However, a large numerical value of n means that the number of grids between the removal parts adjacent to each other in the second region is large, and by extension, it means that the space between the dots is large. A large numerical value of m means that the number of grids between the removal parts adjacent to each other in the first region is large, and by extension, it means that the space between the dots is large. Then, in some cases, it becomes difficult to cause color mixing. Therefore, m and n may be, for example, any natural numbers up to 10 or less, and specifically, m and n may be 5 or less, or 4 or less, or 3 or less.

[0244] The regulations regarding one direction (e.g., the X direction) in this specification are applicable not only to the above formulas but also to the direction perpendicular to the one direction (e.g., the Y direction). And it is preferable to satisfy the regulations in both the one direction and the perpendicular direction. For example, in the plan view of the spectacle lens, the center-to-center distance between adjacent removal portions in the direction H' perpendicular to the one direction H in the first region is all set to be T' times the center-to-center distance between adjacent removal portions in the 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 features as a process of the manufacturing method can be reflected in the configuration of the spectacle lens.

[0246] Regarding the assignment of spots to one pixel, it is preferable to adopt the following configuration. "Based on the relationship between the degree of damage to the lower layer after the high refractive index layer and the total light amount of the laser irradiation, the size of one side of one pixel of the image data, set the number of intersections of the XY grid arranged in the portion corresponding to one pixel of the image data in the drawing data."

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

[0248] Note that an XY grid common to the entire surface of the spectacle lens may be set, or an XY grid with different grid intervals may be set for each decorative part.

[0249] <Details of Laser Processing> Next, the laser processing, which is a non-heat treatment, will be described in more detail.

[0250] ​In this embodiment, for example, as shown in FIG. 7, laser light is irradiated onto the optical interference layer 13 covering the optical surface of the lens substrate 11, and thereby at least a part of the low refractive index layer 131 or the high refractive index layer 132 of the optical interference layer 13 is partially removed, so that a design pattern can be formed (laser processing). Hereinafter, the case of processing the optical interference layer shown in Table 1 above will be described as an example, but it is not limited thereto. The laser light transmitted through the outermost SiO 2 layer reaches the SnO 2 layer on the lower layer side. When it reaches the SnO 2 layer, the SnO 2 layer sublimates or evaporates due to the energy of the irradiation and at least partially disappears from the irradiated portion together with the SiO 2 layer on the upper layer side. That is, a predetermined layer including the SiO 2 layer 131a, which is the low refractive index layer of the outermost layer, is partially removed by the laser processing of irradiating laser light. At this time, the high refractive index layer on the lower layer side may be exposed at the irradiated portion. Through such a removal process, a design pattern is formed. When the high refractive index layer is exposed, the high refractive index layer is, for example, the ZrO

[0251] SnO 2 layer 132a can be formed to have a thickness (for example, 3 to 20 nm, more preferably 3 to 10 nm). In this embodiment, it is 5 nm.

[0252] In addition, SnO 2 functions as a highly reactive reaction layer with respect to laser irradiation. As the material used as this reaction layer, in addition to SnO 2 , indium tin oxide (ITO) can be used.

[0253] By laser irradiation, SnO 2 is removed by sublimation or evaporation, but the reaction layer does not need to be completely removed, and a part may remain at the irradiated portion. For example, by laser irradiation, the reaction layer may be at least partially removed in the thickness direction of the layer.

[0254] The phenomenon that occurs during laser irradiation can be considered as follows. The reaction layer (such as SnO 2 or ITO, etc.) is preferably a conductive layer with higher conductivity compared to other layers included in the laminated structure. When having conductivity, the material of the reaction layer has a smaller bandgap that causes excitation when receiving laser irradiation under the conditions described later, and is more likely to absorb energy, compared to SiO 2 on the upper layer side (the outermost surface side), and ZrO 2 . For this reason, the reaction layer is more likely to disappear due to sublimation / evaporation most rapidly compared to other layers. At this time, it is considered that a phenomenon called so-called multi-photon absorption (for example, two-photon absorption) occurs, and it is considered that laser processing can be performed efficiently.

[0255] In addition, regarding the concern that after SnO 2 disappears, ZrO 2 on the lower layer side is damaged by evaporation, dissolution, etc. due to the irradiation energy, in order to utilize the delay until the stage of occurrence of such damage, by controlling the irradiation conditions, it is possible to substantially remove only the reaction layer and the layers on the upper layer side thereof. And it has been found that it is advantageous to select an ultrashort pulse laser described later for such precise processing control.

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

[0257] The laser processing apparatus used in the present embodiment is configured to irradiate the optical interference layer 13 with laser light through each of these parts 21, 22, 24, 25, as shown in FIG. 10, and includes a laser light source unit 21, an aperture 22, a galvanometer scanner unit 24, and an optical system 25.

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

[0259] In this embodiment, the pulse width of the ultrashort pulse laser 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 still more preferably the pulse width is 0.1 picoseconds or more and less than 15 picoseconds.

[0260] The wavelength of the ultrashort pulse laser can use, for example, the fundamental wavelength of 1064 nm in addition to THG (Third Harmonic Generation) of 355 nm or SHG (Second Harmonic Generation) of 532 nm. In irradiation, the irradiation beam diameter can be selected according to the desired processing design. In order to process a fine design with high resolution, it is effective to narrow the beam diameter. At this time, since the shorter wavelength side is more advantageous, among the above wavelengths, 532 nm is preferable and 355 nm is more preferable. Or FHG (Forth Harmonic Generation) of 266 nm is also suitable.

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

[0262] The following has been found about the laser irradiation conditions. (1) When the pulse width of the ultrashort pulse laser is less than 0.1 picosecond Good processing can be performed at any wavelength from 266 to 1064 nm. The shorter the wavelength, the more advantageous it is in microfabrication. However, in terms of equipment maintenance and cost, the production load is large. (2) When the pulse width of the ultrashort pulse laser is 0.1 picoseconds or more and less than 1 picosecond Good processing can be performed at any wavelength from 266 to 1064 nm. The shorter the wavelength, the more advantageous it is in microfabrication. (3) When the pulse width of the ultrashort pulse laser is 1 picoseconds or more and less than 100 picoseconds Good processing can be performed at any wavelength between 266 and 1064 nm. A shorter wavelength is more advantageous for microfabrication. It is suitable in terms of equipment maintenance, cost, stability of production conditions, etc. (4) When the pulse width of the ultrashort pulse laser is 100 picoseconds or more and less than 1 nanosecond Depending on the applied wavelength, non-uniformity may occur in processing stability. For example, when using 266 nm on the short wavelength side as the applied wavelength, there may be damage to the lower layer side along with the reaction of SnO 2 Also, even at 355 nm, depending on fluctuations in irradiation conditions, it is difficult to obtain processing uniformity, and in the case of removal processing, it may reach the lower layer side than SnO 2 (5) When the pulse width of the ultrashort pulse laser is 1 nanosecond or more SnO 2 And it is difficult to select processing conditions for selectively removing the layer on the surface side and above it.

[0263] In the cases of (4) and (5) above, it may affect the visibility of the processed pattern. For example, in the case of spectacle lenses, there is a risk of interfering with the wearer's vision.

[0264] To prevent such inconveniences, it is important that the removal processing by the ultrashort pulse laser is uniform in terms of processing diameter and depth. For this purpose, it is considered useful to control and utilize the duration of the energy by irradiation and the delay of ablation of the lower layer side material by applying a predetermined ultrashort pulse width.

[0265] If 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, by using a beam shaper to convert the laser beam from the laser light source unit 21 from a Gaussian-type energy distribution to a top-hat type energy distribution, laser processing using a laser beam with a uniform energy distribution may be employed. These means change the energy distribution of the irradiation spot. Therefore, the applicability of these means can be considered in the arrangement of the processing diameter and the selection of the pitch with respect to the pixels of the image data.

[0267] Also, without using a beam shaper, the formation of a design pattern may be performed while applying energy irradiation with a Gaussian distribution.

[0268] On the other hand, the inventor further found that more remarkable effects can be obtained by adding the following devices. Specifically, it was found that the removal part A can be uniformly formed in a fine pattern with a minimum unit of 200 μm or less and can be processed into a spectacle lens that satisfies the conditions of the features of this embodiment. Also, it was found that the surface roughness Ra of the removal part A can be stably processed into a smooth surface with a value less than 0.0080 μm.

[0269] As a specific example of the configuration, for example, at least any one of the following may be satisfied. · The beam divergence angle of the ultrashort pulse laser is less than 0.300 mrad. · The mode quality M2 of the ultrashort pulse laser is 1.1 or less. · An aperture is applied to the beam of the ultrashort pulse laser, and the aperture diameter is 80 μm or less, or 60 μm or less, further 30 μm or less, or 25 μm or less.

[0270] By adopting the above configuration, it was found that sufficient energy can be irradiated to the optical interference layer of the spectacle lens as the workpiece while maintaining the uniformity as a surface.

[0271] In addition, generally, spectacle lenses are formed by curved surfaces. Therefore, by adopting the above configuration, a margin can be provided in the depth of focus compared to the case where a top-hat type distribution is adopted as it is. As described above, this means that it is advantageous for stably obtaining smoothness as a region.

[0272] The galvanometer scanner unit 24 enables scanning with the laser beam by moving the irradiation position of the laser beam from the laser light source unit 21 two-dimensionally or three-dimensionally, and thereby enables formation of a desired design pattern by laser processing. Note that the range where the laser beam can be scanned by the galvanometer scanner unit 24 (i.e., the maximum laser processing area) is set to a size and shape that can completely enclose the outer shape of the spectacle 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 beam from the laser light source unit 21 so that the laser beam reaches the portion to be processed of the spectacle lens.

[0274] Subsequently, a procedure for laser processing performed using a laser processing apparatus having the above configuration will be described.

[0275] In laser processing, first, a spectacle lens to be processed is set in the laser processing apparatus. At this time, the spectacle lens is set so that the optical surface of the spectacle lens, and more specifically, the surface of the optical interference layer 13 on the optical surface, becomes the surface to be processed. The optical surface that becomes the surface to be processed may be either the surface on the object side or the surface on the eyeball side. Here, for example, the surface on the eyeball side is taken as the surface to be processed.

[0276] After setting the spectacle lens, the laser light source unit 21 and the galvanometer scanner unit 24 are operated based on drawing data created in advance (i.e., data for laser processing created based on image data corresponding to the design to be obtained). Thereby, an ultrashort pulse laser is irradiated onto the processing area of the surface to be processed of the spectacle lens 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 processed surface of the spectacle lens and reaches the optical interference layer 13 on the processed surface. When the ultrashort pulse laser reaches, laser processing by the ultrashort pulse laser will be performed in the optical interference layer 13.

[0278] The ablation processing of this embodiment is a technique capable of performing high-energy-efficient processing by the multiphoton absorption phenomenon of the ultrashort pulse laser. More specifically, it is a removal process that suppresses the influence of heat around the processing location as much as possible, and the irradiated location of the laser light instantaneously melts, evaporates, or sublimates and scatters. According to such laser processing, since a highly reactive material is instantaneously removed at the irradiated location, the thermal influence on the periphery of the processing location is small, and processing with less thermal damage (such as deformation due to heat) can be performed.

[0279] The laser processing according to this embodiment can be ablation processing as non-heat processing. Such processing can cause a multiphoton absorption process (for example, a two-photon absorption process) that brings about the multiphoton absorption phenomenon mentioned above. Therefore, even for a material that is relatively transparent (has a high transmittance) to the laser, efficient and good processing can be performed according to multiphoton absorption. In this case, the applicable range of the laser wavelength is wide, and as the wavelength of the laser light, for example, in addition to 355 nm (THG) and 532 nm (SHG), 1064 nm can be advantageously used.

[0280] And as mentioned above, in order to induce the above multiphoton absorption, a picosecond laser or a femtosecond laser with a short pulse width is advantageous. As specific numerical values, for example, the pulse width can be less than 100 picoseconds, preferably less than 50 picoseconds, and more preferably less than 1 picosecond (that is, femtosecond). The pulse width is preferably 10 femtoseconds or more and less than 100 picoseconds.

[0281] When laser processing is performed by irradiation with an ultrashort pulse laser, in the optical interference layer 13, SiO in the multilayer structure constituting the optical interference layer 13 2It passes through and reaches the reaction layer (SnO in this embodiment) 2 ), and as the reaction layer instantaneously reacts and sublimates / evaporates, the outermost SiO 2 layer 131a is removed. In this way, only a predetermined layer including the outermost surface layer of the optical interference layer is partially removed in the shape of the laser processing part which is a part of the design pattern configuration. Along with this, the corresponding part of the water-repellent layer 14 is also removed. As a result, at the irradiated location, the ZrO 2 layer 132b located on the lower layer side of the SnO 2 layer 132a may be exposed.

[0282] By performing laser processing as described above, a predetermined layer including the SiO 2 layer 131a which is the outermost surface layer of the optical interference layer 13 is partially removed, and a design pattern (laser processing) is formed on the surface to be processed of the spectacle lens. As described above, the irradiated location 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 processing part with a size of 200 μm or less as the minimum unit, the removal part A can be formed with a pattern configured with a size of 200 μm or less as the minimum unit of the processing diameter. Therefore, in the manufacturing method of this embodiment, it is possible to irradiate the optical interference layer with an ultrashort pulse laser with a predetermined pattern configured with a size of 200 μm or less as the minimum unit, and remove at least one layer of the laminated structure with the pattern. As a result, in the removal, by adjusting the pattern and the removal area ratio of the decorative part, the color tone of the decorative part can be changed for each region, and its visibility can be controlled.

[0284] The drawing data of the laser processing part may be composed of dots with, for example, the spot diameter by one pulse of the laser processing as the minimum unit. In this case, a more precise pattern can be formed. Also, by performing the processing while partially overlapping each dot formed by the laser processing, it is easy to form various characters, symbols, line drawings, etc. as the removal part A not only with dots. For example, by forming a plurality of dots in one direction while partially overlapping them, a linear removal part A with the dot diameter as the line width can be formed. Further, by further overlapping the linearly shaped removal part A formed in this way in the line width direction, a region composed only of the removal part A can also be formed.

[0285] Furthermore, by setting the minimum unit of the drawing data of the laser processing part as dots, the removal area ratio of the pattern formed by arranging the dots regularly can be easily adjusted by adjusting the interval between the dots. That is, by making the interval between the dots narrower and forming a pattern with a higher dot density, a region with a high removal area ratio can be formed.

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

[0287] [Glasses] The glasses according to this embodiment are also applicable to glasses including a glasses frame and a lens-shaped processed glasses lens having an object side surface and an eyeball side surface. By replacing the "glasses lens" described so far with the "lens-shaped processed glasses lens", the content described so far is applicable to glasses.

[0288] The glasses frame may be of a normal full-rim type, a rimless type, or a half-rim type (even those without a rim in part of the periphery of the lens-shaped processed glasses lens are included in this type).

[0289] [Optical member] The spectacle lens according to the present embodiment can also be used as an optical member having a similar configuration. In the optical member, a substrate and an optical interference layer suitable for its use are selected. Examples of the optical member include a protective film for a liquid crystal screen, a window member, a face shield, and a trial lens for a spectacle lens in which the prescription of the wearer has not yet been reflected. In addition, by replacing the "spectacle lens" described so far with an "optical member", the content described so far is applicable.

[0290] According to the technology of the present embodiment, it is possible to apply not only technical or commercial markings but also decorations of a desired design such as characters, symbols, and patterns to the lens, and to provide spectacle lenses, spectacles, and a method for manufacturing spectacle lenses, etc., with decorations having a higher degree of freedom and richer expressions.

Example

[0291] Hereinafter, examples of the spectacle lens according to the present embodiment will be shown. The present invention is not limited to the following examples.

[0292] It should be noted that the spectacle lens corresponding to the present invention includes a region (50% removed) (for example, the first region) produced in Test Example 2 below and another region. The other region mentioned here is, for example, the unprocessed region in Test Example 1 below, the solid pattern region in Test Example 3 below, or a variation of the region produced in Test Example 2. Therefore, strictly speaking, each of the following test examples is more of a reference example than an example. Each of the following test examples is a test for quantitatively showing that, for example, Test Example 2 corresponding to the first region has a color tone different from both the unprocessed region and the solid pattern region.

[0293] An antireflection film (product name: Venus Guard Coat Lapis RUV) was formed on the object side surface and the eyeball side surface of a urethane lens substrate. Processing was performed on the antireflection film on the eyeball side surface by irradiating it with an ultrashort pulse laser. The laser conditions were as follows: the wavelength was 355 nm, the pulse width was 12 picoseconds, and the processing diameter of one pulse was approximately 20 μm. The dimensions of the processed area were 20 mm × 20 mm. That is, for this 20 mm × 20 mm area, the average reflectance and the numerical values in the color space of L*, a*, and b* described below were measured.

[0294] As Test Example 1, a spectacle lens with the above antireflection film without the above processing was prepared. As Test Example 2, a spectacle lens with the above antireflection film was prepared, on which the above processing was performed on the 20 mm × 20 mm area, and the removal area ratio was 50%. As a method for realizing a removal area ratio of 50%, the above XY grid was assumed, and spots (the intersections of the XY grid) (3 in the X direction and 2 in the Y direction) were assigned to one pixel. Then, the connected bodies of these spots were arranged at intervals of one intersection in the X direction and at intervals of two intersections in the Y direction. As Test Example 3, a spectacle lens with the above antireflection film on which a solid pattern with no unprocessed part (i.e., 100% processed) was formed was prepared.

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

Table 2

[0296] From the above table, a change in hue due to the processing of the present invention was confirmed.

[0297] First, 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] In addition, in Test Example 2 (50% processed), compared with Test Example 1 (unprocessed), the a* value of the color coordinates decreased, and the b* value of the color coordinates increased significantly. It can be seen that in Test Example 2 (50% processed) compared with Test Example 1 (unprocessed), the redness decreased, the blueness decreased, and the yellowness increased. Also, from the change in the absolute values of a* and b*, it can be seen that the chroma decreased. This indicates that the color tone γ brought about by Test Example 2 (50% processed) is different from both the color tone α brought about by Test Example 3 (100% processed) and the color tone β brought about by Test Example 1 (unprocessed).

Explanation of Signs

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

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; having 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, is present 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; having the first region and the second region are visually recognized as regions having different color tones; The first region; a second region in which the removed portions are arranged with a second regularity; having A spectacle lens, wherein the arrangement of the removed portions is different between the first region and the second region.

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

3. The color tone is uniform 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 eyeglass lens according to claim 1 , wherein the first regularity is an aspect in which the removed portions are repeatedly arranged in at least one direction.

6. 6. The eyeglass lens of claim 5, 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 by no more than 20% within the first region for 80% or more of the dots in the first region.

7. The eyeglass lens according to claim 5 , wherein in a plan view of the eyeglass lens, a 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.

8. The eyeglass lens of claim 1 , wherein the non-removed portions of the first region surround each of the removed portions, are surrounded by the removed portions, or are a combination thereof.

9. In a plan view of the eyeglass lens, when the directions perpendicular to each other are defined as 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, 2. The eyeglass lens of claim 1, 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 include only one intersection of the XY lattice.

10. 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 of the intersections of the XY lattice, 10. The eyeglass lens according to claim 9, wherein the removed portions in the second region are thinned out in accordance with a second thinning regularity different from the first thinning regularity from a virtual state in which removed portions are formed at all of the intersections of the XY lattice.

11. the first regularity includes a regularity of center-to-center distances between the removed portions in one direction G in the first region, The eyeglass lens according to claim 1 , wherein the second regularity includes a regularity of a center-to-center distance between the removed portions in one direction G in the second region.

12. 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, 2. The spectacle lens according to claim 1, wherein 0.9*m / n≦T≦1.1*m / n (where m and n are natural numbers).

13. The eyeglass lens according to claim 1 , wherein the second region consists of only the removed portion.

14. The eyeglass lens according to claim 1 , wherein the luminous transmittance of each of the first region and the second region is 80% or more.

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

16. A pair of spectacles comprising a spectacle frame and a shaped spectacle lens having an object side surface and an eyeball side surface, A pair of spectacles, the spectacles lens being the spectacles lens according to any one of claims 1 to 15.

17. A method for manufacturing a spectacle lens having an object-side surface and an eyeball-side surface, comprising the steps of: 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 at least one layer of the optical interference layer is locally removed by laser irradiation and removed portions are arranged with a first regularity, and non-removed portions in which the layer is not removed are present between the removed portions; a second region, which is a region in which 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 from each other, The first region; a second region in which the removed portions are arranged with a second regularity by irradiation with a laser; Forming A method for manufacturing a spectacle lens, comprising: making the arrangement of the removed portions different between the first region and the second region.

18. A step of creating drawing data including a planned laser irradiation location on the surface on which the optical interference layer is provided, from image data of a desired decoration 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; having 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 17, wherein the removed portion is formed by partially removing the low refractive index layer that is the outermost layer of the multi-layer structure.

19. When the mutually perpendicular directions are the X and Y directions, and a combination of straight lines arranged at equal intervals s in the X direction and straight 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 of the degree of damage to the lower layers below the high refractive index layer to the total amount of laser irradiation, 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 adopted in the first region and the second region, The method for manufacturing a spectacle lens 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 so as to include only one intersection point 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; and 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 within 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 such a manner that the irradiation points are thinned out in accordance with a first thinning rule from a virtual state in which the laser is irradiated to all of the intersections of the XY lattice, 20. The method for manufacturing a spectacle lens according to claim 19, wherein the laser irradiation points in the second region are arranged in such a manner that the irradiation points are thinned out in accordance with a second thinning regularity different from the first thinning regularity from a virtual state in which the laser is irradiated to all of the intersections of the XY lattice.

22. The method for manufacturing a spectacle lens according to claim 17, 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%.

23. The method for manufacturing a spectacle lens according to claim 18, wherein the drawing data corresponds one processing spot by laser irradiation to one pixel of the image data.

24. The method for manufacturing a spectacle lens according to claim 18 , wherein the drawing data corresponds to a plurality of processing spots by laser irradiation for one pixel of the image data.

25. The method for manufacturing a spectacle lens according to claim 18 , 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 each other.

26. The method for manufacturing a spectacle lens according to claim 18, 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 member, A substrate; an optical interference layer having a laminated structure provided on a surface of the substrate; having 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, is present 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; having the first region and the second region are visually recognized as regions having different color tones; The first region; a second region in which the removed portions are arranged with a second regularity; having An optical member, wherein the arrangement of the removed portions is different between the first region and the second region.

Images