Classifications

• • G—PHYSICS
  • G02—OPTICS
  • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
  • G02B1/00—Optical elements characterised by the material of which they are made; Optical coatings for optical elements
  • G02B1/10—Optical coatings produced by application to, or surface treatment of, optical elements
  • G02B1/11—Anti-reflection coatings
• • G—PHYSICS
  • G02—OPTICS
  • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
  • G02B1/00—Optical elements characterised by the material of which they are made; Optical coatings for optical elements
  • G02B1/10—Optical coatings produced by application to, or surface treatment of, optical elements
  • G02B1/11—Anti-reflection coatings
  • G02B1/113—Anti-reflection coatings using inorganic layer materials only
  • G02B1/115—Multilayers
• • G—PHYSICS
  • G02—OPTICS
  • G02C—SPECTACLES; SUNGLASSES OR GOGGLES INSOFAR AS THEY HAVE THE SAME FEATURES AS SPECTACLES; CONTACT LENSES
  • G02C11/00—Non-optical adjuncts; Attachment thereof
  • G02C11/02—Ornaments, e.g. exchangeable
• • G—PHYSICS
  • G02—OPTICS
  • G02C—SPECTACLES; SUNGLASSES OR GOGGLES INSOFAR AS THEY HAVE THE SAME FEATURES AS SPECTACLES; CONTACT LENSES
  • G02C7/00—Optical parts
  • G02C7/02—Lenses; Lens systems ; Methods of designing lenses
• • G—PHYSICS
  • G02—OPTICS
  • G02C—SPECTACLES; SUNGLASSES OR GOGGLES INSOFAR AS THEY HAVE THE SAME FEATURES AS SPECTACLES; CONTACT LENSES
  • G02C7/00—Optical parts
  • G02C7/02—Lenses; Lens systems ; Methods of designing lenses
  • G02C7/021—Lenses; Lens systems ; Methods of designing lenses with pattern for identification or with cosmetic or therapeutic effects

Definitions

• the present invention relates to spectacle lenses and spectacles.
• an eyeglass frame is also simply referred to as a frame, and of the eyeglass frame, the rim (a member into which a spherical eyeglass lens is fitted) will be specifically described.
• Eyeglass lenses that have been processed into a spherical shape are also called spherical lenses.
• the spherical processing is also called frame cutting.
• the rim not only maintains the strength of the glasses, but also accentuates the appearance of the wearer's facial features by highlighting the contours of the spherical lenses. Ta.
• An object of the present disclosure is to provide a technique for appropriately highlighting the outline of a spherical lens with or without a rim to improve its appearance.
• the first aspect of the present invention is a lens base material having an optical surface; an antireflection film that covers the optical surface of the lens base material,
• the anti-reflection film has a multilayer structure including a laminated layer of a low refractive index layer and a high refractive index layer,
• the anti-reflection film includes a reactive layer that has a relatively higher reactivity to ultrashort pulse laser irradiation than other layers included in the anti-reflection film, At the removal location formed by at least partially removing a predetermined layer including the outermost layer of the multilayer structure, the high refractive index layer below the reaction layer or the reaction layer where a portion remains
• This eyeglass lens has a bead-shaped marking that allows the removed portion to be visually recognized by visible light due to the exposed portion.
• the second aspect of the invention is The eyeglass lens according to the first aspect, wherein the removed portion also constitutes a decorative pattern other than the bead-shaped marking.
• the third aspect of the present invention is The eyeglass lens according to the second aspect, wherein the decorative pattern is provided on an inner edge of the bead-shaped marking.
• the fourth aspect of the present invention is The eyeglass lens according to any one of the first to third aspects, wherein the bead-shaped marking is annular.
• the fifth aspect of the present invention is A spherical eyeglass lens with a border around the outer edge, a frame on which the spherical eyeglass lens is attached,
• the eyeglass lens is a lens base material having an optical surface; an antireflection film that covers the optical surface of the lens base material,
• the anti-reflection film has a multilayer structure including a laminated layer of a low refractive index layer and a high refractive index layer,
• the anti-reflection film includes a reactive layer that has a relatively higher reactivity to ultrashort pulse laser irradiation than other layers included in the anti-reflection film,
• the border line so that it can be visually recognized by visible light
• the sixth aspect of the present invention is The eyeglasses according to the fifth aspect, wherein the removed portion also constitutes a decorative pattern other than the border line.
• the seventh aspect of the present invention is The eyeglasses according to the sixth aspect, wherein the decorative pattern is applied to an inner edge of the border line.
• the eighth aspect of the present invention is The eyeglasses according to any one of the fifth to seventh aspects, wherein the border line is annular.
• the ninth aspect of the present invention is The type of rim of the frame is rimless or half rim,
• the border line is marked as a pseudo rim at least in a portion where the rim is not present.
• the outline of the spherical lens can be appropriately highlighted and the appearance effect can be improved.
• FIG. 1A is a front view showing a spectacle lens according to an embodiment of the present invention.
• FIG. 1B is a bottom view of a spectacle lens according to an embodiment of the present invention.
• FIG. 2A is a front view showing a spectacle lens according to another embodiment of the present invention.
• FIG. 2B is a partial schematic front view of eyeglasses after cutting the eyeglass lenses of FIG. 2A and fitting them into a frame.
• FIG. 2C is a partial schematic front view of the eyeglasses after frame-cutting the eyeglass lenses of FIG. 2A and fitting them into a half-rim type frame.
• FIG. 3 is a front view showing a spectacle lens according to another embodiment of the present invention.
• FIG. 3A is a front view showing a spectacle lens according to another embodiment of the present invention.
• FIG. 3B is a partial schematic front view of the eyeglasses after frame-cutting the eyeglass lenses of FIG. 3A and fitting them into a half-rim type frame.
• FIG. 4 is a front view showing a spectacle lens according to another embodiment of the present invention.
• FIG. 5 is a front view showing a spectacle lens according to another embodiment of the present invention.
• FIG. 6 is a front view showing a spectacle lens according to another embodiment of the present invention.
• FIG. 7 is an explanatory diagram for explaining a preferred example of the border line based on FIG. 4.
• FIG. 8 is a front view showing an example of processing a spectacle lens according to an embodiment of the present invention.
• FIG. 9 is a diagram showing a specific example, based on FIG.
• FIG. 10 is a flow diagram illustrating an example of the procedure of a method for manufacturing a spectacle lens according to an embodiment of the present invention.
• FIG. 11 is a side sectional view showing an example of a laminated structure of thin films in a spectacle lens according to an embodiment of the present invention.
• FIG. 12 is an explanatory diagram showing an example of a schematic configuration of a laser processing apparatus used in a method for manufacturing a spectacle lens according to an embodiment of the present invention.
• FIG. 13 is an explanatory diagram showing an example of a main part configuration of a spectacle lens according to an embodiment of the present invention.
• FIG. 1A is a front view showing a spectacle lens according to an embodiment of the present invention.
• FIG. 1B is a rear view of a spectacle lens according to an embodiment of the present invention.
• FIG. 2A is a front view showing a spectacle lens according to another embodiment of the present invention.
• FIG. 2B is a partial schematic front view of eyeglasses after cutting the eyeglass lenses of FIG. 2A and fitting them into a full-rim type frame.
• FIG. 2C is a partial schematic front view of the eyeglasses after frame-cutting the eyeglass lenses of FIG. 2A and fitting them into a half-rim type frame.
• FIG. 3A is a front view showing a spectacle lens according to another embodiment of the present invention.
• FIG. 3A is a front view showing a spectacle lens according to another embodiment of the present invention.
• FIG. 3B is a partial schematic front view of the eyeglasses after frame-cutting the eyeglass lenses of FIG. 3A and fitting them into a half-rim type frame.
• FIG. 4 is a front view showing a spectacle lens according to another embodiment of the present invention.
• FIG. 5 is a front view showing a spectacle lens according to another embodiment of the present invention.
• FIG. 6 is a front view showing a spectacle lens according to another embodiment of the present invention.
• the side of the optical center of the spectacle lens is referred to as the inside, and the side of the outermost edge of the spectacle lens is referred to as the outside.
• the optical center is made to coincide with the geometric center and centering center.
• the optical center will also be referred to as the lens center.
• the side of the frame center is called the inside, and the side of the outermost edge of the spherical lens is called the outside.
• the outline of the outermost edge of the spherical lens matches the outline of the spherical shape 5 of the spectacle lens 1 before frame cutting.
• the frame center is the center position of the spherical lens (i.e., the area within the rim) when a third person views the eyeglasses from the front.
• the center position of the spherical lens may be the geometric center of a rectangle (boxing) that circumscribes the spherical lens and includes the spherical lens.
• the frame center may coincide with the optical center and the centering center.
• the eyeglass lens according to this embodiment is a lens base material having an optical surface; an antireflection film that covers the optical surface of the lens base material,
• the anti-reflection film has a multilayer structure including a laminated layer of a low refractive index layer and a high refractive index layer,
• the anti-reflection film includes a reactive layer that has a relatively higher reactivity to ultrashort pulse laser irradiation than other layers included in the anti-reflection film, At the removal location formed by at least partially removing a predetermined layer including the outermost layer of the multilayer structure, the high refractive index layer below the reaction layer or the reaction layer where a portion remains
• marking or patterning, hereinafter collectively referred to as marking
• the method for manufacturing the spectacle lens according to this embodiment can also be achieved.
• the markings are formed by partially removing the antireflection film.
• This marking 2M is bead-shaped.
• This "cut lens-like" may or may not be a cut lens shape 5 that is predetermined for a certain eyeglass lens before processing.
• "bead shape” refers to a shape in front view on a spectacle lens that can be used as a bead shape.
• the lens shape is mainly composed of arcuate lines (concave toward the center of the lens) and/or straight lines. If the predetermined spherical shape is complex, a curved line other than an arc may be used in accordance with the spherical shape.
• one-point marks are excluded from this "ball-shaped marking 2M."
• numbers and letters such as serial numbers are also excluded. Note that these letters, numbers, and one-point marks may be provided on the spectacle lens of this embodiment as a decoration pattern 3 (described later) that is separate from the marking 2M.
• the spherical marking 2M may be formed as a band-shaped region of a predetermined width near the outer edge, following the shape of the outer edge of the lens after frame cutting. As described later, it may be formed along a part of the outer edge of the lens after frame cutting. In that case, it may be formed as a band-shaped region having a desired width and length as described below.
• the marking 2M of this spherical shape may be rephrased as the "edging line 2M" for the spherical shape 5. That is, in this embodiment, it can be said that the edging line 2M is marked on the spectacle lens before processing.
• border line 2M Each feature of the border line 2M described below also applies to the marking 2M.
• the border line 2M will be mainly mentioned and explained.
• the "edging line 2M” in this specification is a line that outlines the outline of the globe shape 5, which is the planned cutting position.
• the border line 2M may have a similar shape to the outline of the globe shape 5.
• this "similarity" does not necessarily have to be strictly the same size ratio. This is because a spherical lens is generally not completely circular and has different widths in the vertical and horizontal directions, so when simply enlarged or reduced, the distance between the outline of the spherical shape 5 and the border line 2M is This is because it differs depending on the direction.
• the border line 2M has a similar shape to the outline of the lens shape 5, it is slightly deformed so that the difference in distance between the outline of the lens shape 5 and the border line 2M is within about 10%. It may also have a similar shape.
• the outline of the spherical shape 5, which is the planned cutting position may or may not be marked on the spectacle lens. When marking the edge line 2M so as to overlap the outline of the spherical shape 5, this naturally leads to the outline of the spherical shape 5 being marked on the spectacle lens.
• the edging line 2M protrudes from the rim shape 2 in the eyeglass lens 1A after being inserted into the frame 2F (FIGS. 2A and 2B).
• the border line 2M may be marked in a non-contact state with the spherical shape 5 (more specifically, in a non-contact with the spherical shape 5 and inside it) (FIGS. 1A, 1B, 5, and 6). ).
• the border line may be marked at a position that does not overlap the outline of the spherical shape 5 and is shifted inward from the outline of the spherical shape 5.
• a “fringing line” it is better not to set it too far away from the outline of the globe shape 5.
• the distance (shortest distance) from the outline of the spherical shape 5 to the edge line is preferably 3.0 mm or less, 2.0 mm, and 1.0 mm or less in this order.
• the "edging line 2M" in this specification is mainly composed of arched lines and/or straight lines, similar to the marking 2M described above.
• the edging line 2M may be a closed loop (annular) or an open loop (with a part of the annular edging line erased).
• An open loop can also be said to be a state in which only a portion of the border line is provided.
• border line 2M a part of the outline of the spherical lens may be marked with a border line 2M.
• the locations of the border lines 2M at this time may be, for example, four locations (four corners) as shown in FIG. 4, or may be located at other locations.
• the "edging line 2M" in this specification refers to a portion that can be visually recognized. For example, there is a case where a closed loop forming the border line 2M is visually recognized as a broken line.
• the solid line portion of the broken line is formed by arranging in a line a portion of the antireflection film that is exposed in a linear manner by successively performing dot-like processing using laser processing, which will be described later.
• the blank area indicated by the dashed line is not exposed in this way. Due to the difference in the processing conditions between the two, a broken border line 2M is visible when the spectacle lens is viewed from the front.
• the "edging line 2M" in this specification refers to the above-mentioned linear portion that is actually processed.
• the border line 2M is made visible by observing from the object plane side of the spectacle lens 1.
• FIG. 7 is an explanatory diagram for explaining a preferred example of the border line based on FIG. 4.
• a border line 2M is formed in the fan-shaped area a with a rotation angle of 15 to 60 degrees. is considered herein to be.
• the edge line 2M is also formed in a fan-shaped area b with a rotation angle of 120 to 165 degrees, a fan-shaped area c with a rotation angle of 195 to 240 degrees, and a fan-shaped area d with a rotation angle of 300 to 345 degrees. deemed herein.
• the fan-shaped areas a to d all have a central angle of 45 degrees. Each central angle is expressed as a1 to d1.
• the "edging line 2M” refers to a processed portion that continuously connects two sides of one fan-shaped area centered on the lens center.
• FIG. 7 there are a plurality of border lines 2M (a total of four corresponding to each of the fan-shaped areas a to d). If each border line 2M is extended, it can become one closed annular line.
• Each border line 2M in FIG. 7 can also be said to be a solid line portion of the broken line.
• a spectacle lens is always provided with a hidden mark, so that when it is attached to a frame, the left and right (horizontal) directions can be determined, and by extension, the up and down (vertical) directions can also be determined.
• the total central angle of the entire spectacle lens is 60 degrees or more (preferably 90 degrees or more, 120 degrees or more, 150 degrees or more, 180 degrees or more, 210 degrees or more).
• the border line 2M may be provided in the entire fan-shaped area (at least 240 degrees, at least 270 degrees, at least 300 degrees, at least 330 degrees).
• the border line 2M may be the solid line part of the broken line mentioned above, the solid line itself, or the solid line part (for example, a dot in laser processing) of the dotted line.
• the number of lines may be singular or plural (see FIG. 5). If there are multiple lines, the thickness of the lines may be changed. Further, different types of lines as described above may be mixed. Further, as shown in FIG. 6, a checkerboard pattern (hereinafter referred to as a checker pattern) border line may be provided in which solid line portions of broken lines and blank portions are alternately arranged in the vertical direction.
• the specific value of the width of the border line 2M is, for example, the width of the border line 2M.
• the minimum width may be 1.0 mm or more. Although there is no limitation on the maximum width, it may be, for example, 3.0 mm or less.
• the following advantageous effects are achieved. That is, it is possible to improve the design of the eyeglass lens 1A after spherical processing (after being inserted into a frame).
• the rims have the effect of accentuating the appearance of the wearer's facial features by highlighting the contours of the spherical lenses.
• the border line functions as a so-called pseudo rim, and even in rimless glasses, the contours of the spherical lenses can be highlighted and the aesthetic appearance can be improved.
• eyeglasses that include a frame and eyeglass lenses whose outer edges are marked with a border line.
• the type of rim of the frame is rimless or half rim
• the border line may be marked as a pseudo rim at least in a portion where there is no rim (FIGS. 2A, 3A, and 3B).
• the edge line 2M exists during edging, and the eyeglass lens only needs to be discarded if there is a defect inside this edge line 2M. As a result, it becomes possible to utilize spectacle lenses that would otherwise have been discarded.
• the spectacle lens according to this embodiment has an object-side surface and an eyeball-side surface as optical surfaces.
• the "object side surface (object surface)” is a surface located on the object side when glasses equipped with spectacle lenses are worn by a wearer.
• the "eyeball side surface (ocular surface)” is the opposite, that is, the surface located on the eyeball side when glasses equipped with spectacle lenses are worn by a wearer.
• the object side surface is a convex surface and the eyeball side surface is a concave surface, that is, a spectacle lens is a meniscus lens. This also applies to eyeglass lenses after spherical processing (processed lenses).
• FIG. 8 is a front view showing an example of processing the eyeglass lens according to the present embodiment.
• an eyeglass lens 1 having a circular shape in front view (for example, outer diameter ⁇ 60 to 80 mm) is subjected to spherical processing (frame processing) in which the outer shape of the lens is shaved to match the rim shape 2 of the eyeglass frame worn by the wearer. Cut processing).
• frame processing spherical processing
• marking of the edging line 2M is performed on the eyeglass lens prior to edging.
• markings on the optical surface of the decorative pattern 3 representing one-point marks such as logos and house marks, letters, symbols, designs, etc. are placed within the lens area after frame cutting.
• markings on the optical surface of the decorative pattern 3 representing one-point marks such as logos and house marks, letters, symbols, designs, etc. are placed within the lens area after frame cutting.
• decoration pattern 3 refers to a pattern different from the border line 2M. In this embodiment, both are manufactured using the same work content.
• the decorative pattern may be provided on the inner side of the border line and at the end (for example, at least one of the four corners) of the spherical shape 5.
• the decoration pattern 3 provided at the edge serves as a good accent, further improving the aesthetic appearance.
• FIG. 9 shows this situation.
• FIG. 9 is a diagram showing a specific example, based on FIG. 1A, in which the decorative pattern is provided inside the border line and at the end (for example, at least one of the four corners) of the spherical shape 5.
• the character "HOY" in the decoration pattern 3 exists outside the inscribed circle (the long two-dot chain line in the figure).
• marking can be done using laser irradiation processing that allows precise control of the irradiation position based on digital data, but it is undesirable to avoid marking that would cause deterioration in lens quality and functionality. do not have. Therefore, in this embodiment, the border line 2M
• the marking of the decorative pattern 3 is performed according to the processing procedure described below.
• FIG. 10 is a flow diagram illustrating an example of the procedure of the method for manufacturing a spectacle lens according to the present embodiment.
• a lens base material which is an optical base material
• the lens base material is polished according to the prescription information of the eyeglass wearer, and if necessary, dyed.
• the lens base material for example, a resin material having a refractive index (nD) of about 1.50 to 1.74 is used.
• the resin material include allyl diglycol carbonate, urethane resin, polycarbonate, thiourethane resin, and episulfide resin.
• the resin material may be made of other resin materials that provide the desired degree of refraction, or it may be made of inorganic glass.
• the lens base material has optical surfaces for configuring a predetermined lens shape on each of the object-side surface and the eyeball-side surface.
• the predetermined lens shape may be a monofocal lens, a multifocal lens, a progressive power lens, etc., but in any case, each optical surface is specified based on the prescription information of the eyeglass wearer. It is composed of curved surfaces.
• the optical surface is formed, for example, by a polishing process, but may be a cast (molded) product that does not require a polishing process. Note that the polishing treatment and dyeing treatment for the lens base material may be performed using known techniques, and detailed explanation thereof will be omitted here.
• a hard coat film is formed on at least one optical surface of the lens base material, preferably on both optical surfaces (S102).
• the HC film is, for example, a film formed using a curable material containing a silicon compound, and has a thickness of about 3 ⁇ m to 4 ⁇ m.
• the refractive index (nD) of the HC film is close to the refractive index of the material of the lens base material described above, for example, about 1.49 to 1.74, and the film configuration is selected depending on the material of the lens base material. By coating with such an HC film, the durability of the eyeglass lens can be improved.
• the HC film may be formed, for example, by a dipping method using a solution in which a curable material containing a silicon compound is dissolved.
• an antireflection film (AR film) is subsequently formed so as to overlap the HC film (S103).
• the AR film has a multilayer structure in which films with different refractive indexes are laminated, and is a film that prevents reflection of light by interference.
• the AR film has a multilayer structure in which a low refractive index layer and a high refractive index layer are laminated.
• the low refractive index layer is made of, for example, silicon dioxide (SiO 2 ) having a refractive index of about 1.43 to 1.47.
• the high refractive index layer is made of a material having a higher refractive index than the low refractive index layer, such as zirconium oxide (ZrO 2 ), tin oxide (SnO 2 ), niobium oxide (Nb 2 O 5 ), tantalum oxide, etc. (Ta 2 O 5 ), titanium oxide (TiO 2 ), yttrium oxide (Y 2 O 3 ), aluminum oxide (Al 2 O 3 ), mixtures thereof (for example, indium tin oxide (ITO)), etc. Ru.
• the high refractive layer containing Sn and O has greater reactivity to ultrashort pulse lasers, which will be described later, than other layers, and thus functions as a reactive layer.
• the above-mentioned SnO 2 and ITO correspond to this.
• the term "reactive layer” as used herein refers to a layer that has low excitation energy when irradiated with a laser.
• ultrashort pulse laser irradiation is performed.
• the SnO 2 layer which can serve as a reaction layer, has extremely low excitation energy due to multiphoton absorption (for example, two-photon absorption) and is highly reactive. This also applies to the ITO layer, and the ITO layer can also serve as the reaction layer in this specification.
• at least a portion of the SnO 2 layer (or ITO layer) sublimes or evaporates and disappears from the irradiated area together with the overlying SiO 2 layer.
• a reactive layer that is relatively more reactive than other layers included in the multilayer structure refers to a SnO2 layer or an ITO layer in one embodiment of the present invention.
• the reaction layer may be set to have the highest reactivity than other layers included in the multilayer structure.
• the outermost layer of the multilayered AR film is configured to be a low refractive index layer (for example, two SiO layers).
• a low refractive index layer for example, two SiO layers.
• the lowest layer (on the base material side) of the multilayer structure is also a low refractive index layer (for example, two SiO 2 layers).
• the AR film may be formed by applying ion-assisted vapor deposition, for example.
• a water-repellent film may be formed on the low refractive index layer that is the outermost layer of the AR film.
• the water-repellent film may also be referred to as an antifouling film.
• the water-repellent film may be formed before marking according to this embodiment or after marking is performed.
• the water-repellent film is a film that imparts water repellency to the surface, and can be constructed by applying a fluorine-based compound solution such as metaxylene hexafluoride, for example.
• the water-repellent film may be formed by, for example, ion-assisted vapor deposition, as in the case of the AR film.
• another functional layer may be formed on the AR film. There is no problem whether such a functional layer contains a metal component or not, as long as the effect of precise processing by laser irradiation can be obtained. Moreover, such a functional layer may be a uniform film or may be scattered on the surface.
• FIG. 11 is a side sectional view showing an example of a laminated structure of thin films according to this embodiment.
• the laminated structure in the illustrated example is constructed by laminating an HC film 12, an AR film 13, and a water-repellent film 14 in this order on the optical surface of a lens base material 11.
• the AR film 13 has a multilayer structure in which a SiO 2 layer 13a, which is a low refractive index layer, and a SnO 2 layer 13b, and a ZrO 2 layer 13c, which are high refractive index layers, are laminated, and the outermost layer (i.e. The surface layer on the side of the water-repellent film 14) is configured to be a SiO 2 layer 13a.
• the SnO 2 layer is both a high refractive index layer and a reactive layer.
• the eyeglass lens on which the thin film is formed is marked with a border line 2M, a frame cut process is performed along the outline of the lens shape 5, and decoration is performed. Mark pattern 3.
• a border line 2M is marked on the eyeglass lens after the thin film has been formed.
• marking the edging line 2M first, mark the lens height of the processing area on the processed surface of the eyeglass lens (specifically, the optical surface on the non-blocked side) while it is in the blocked state.
• the shape (that is, the three-dimensional shape of the processing area on the surface to be processed) is measured (S107).
• the measurement method is not particularly limited, it is conceivable to use a non-contact three-dimensional measuring machine, for example.
• the processing area is an area including a laser scan area, which will be described later.
• laser processing is performed in which the processing area is irradiated with a laser beam, and the irradiation position of the laser beam is determined using prepared pattern data (i.e., contour data of the lens shape 5).
• a raster scan for movement is performed based on (S108).
• Vector scan may be used instead of raster scan.
• the eyeglass lens is marked with a border line 2M based on the outline data of the frame shape.
• a decorative process is to be performed after frame cutting (S104: after cutting)
• one optical surface of the eyeglass lens to be processed (specifically, the optical surface that will not be subjected to the decorative process described later) is Jig blocking is performed for mounting on a dedicated jig (S105).
• the blocked eyeglass lens is set in the eyeglass processing machine, and the eyeglass lens is subjected to eyeball processing (frame cutting processing), and the outer shape of the eyeglass lens is cut into a frame shape (S106).
• Jig blocking and frame cutting may be performed using known techniques, so detailed description thereof will be omitted here.
• a decoration process i.e., marking of a decoration pattern
• the details of the decoration process, and further the details of the laser process for marking the decorative pattern, may be the same as the marking of the border line 2M.
• jig deblocking is performed to remove the eyeglass lens from the special jig (S109), and the lens is removed from the removed eyeglass lens to remove any residue or deposits (foreign matter) from marking. Cleaning is performed (S110). After a final lens appearance inspection (S111), the production of the spectacle lens is completed.
• the frame is to be cut after marking the edging line 2M and processing the decorative pattern 3 (S104: before cutting)
• Execute S112
• the lens height of the processed area that is, the three-dimensional shape of the processed area on the processed surface
• the measurement method is the same as in the case where decoration is performed after frame cutting as described above.
• laser processing is performed to irradiate the processing area with laser light
• raster scanning is performed to move the laser light irradiation position based on pattern data prepared in advance ( S114).
• Vector scan may be used instead of raster scan.
• the decorative pattern is marked in the processing area of the processing surface of the eyeglass lens. Note that details of the laser processing for marking the decorative pattern will be described later.
• frame cutting is performed on the marked eyeglass lens. That is, the blocked eyeglass lens is set in the eyeglass processing machine, and the eyeglass lens is subjected to eyeglass processing (frame cutting processing), and the outer shape of the eyeglass lens is cut into a frame shape (S115). After the frame cutting process, jig deblocking is performed to remove the eyeglass lens from the special jig (S116), and the removed eyeglass lens is cleaned to remove residues and deposits (foreign matter) from the process. Execute (S117). After a final lens appearance inspection (S118), the production of the spectacle lens is completed.
• the AR film 13 covering the optical surface of the lens base material 11 is irradiated with a laser beam, thereby partially damaging a predetermined layer including the SiO 2 layer 13a, which is the outermost layer of the AR film 13.
• a decorative pattern can be marked.
• the laser light transmitted through the outermost SiO 2 layer reaches the SnO 2 layer below it, the SnO 2 layer is sublimated or evaporated by the irradiation energy, and the SiO 2 layer on the upper layer side is sublimated or evaporated by the energy of the irradiation . It disappears from the irradiated area along with the layer.
• a predetermined layer including the outermost SiO 2 layer 13a is partially removed by laser processing using laser beam irradiation.
• the irradiated area is marked with a decorative pattern through a removal step that exposes the high refractive index layer below it.
• the exposed high refractive index layer is, for example, the ZrO 2 layer 13c.
• the SnO 2 layer 13b can be formed thin (for example, 3 to 20 nm, more preferably 3 to 10 nm). In this embodiment, the thickness was set to 5 nm.
• SnO 2 functions as a reaction layer that has the highest reactivity to laser irradiation.
• This reaction layer preferably contains Sn and O, and in addition to SnO2 , ITO can be used.
• the reaction layer does not necessarily have to be completely removed. , a portion may remain in the irradiated area.
• the reaction layer may be at least partially removed in the thickness direction of the layer by laser irradiation.
• partial removal due to laser irradiation, a part of the reaction layer remains at the laser irradiation location not only in the thickness direction of the layer but also when viewed from the laser irradiation direction (front view). I don't mind.
• ZrO 2 may be only partially exposed.
• SnO 2 (or ITO) is also a high refractive index material, and when viewed from the front, there is no problem with visibility even if ZrO 2 is not completely exposed due to SnO 2 . be. Therefore, it is sufficient that the high refractive index layer on the lower layer side of the reaction layer or the reaction layer partially remaining together with the high refractive index layer is exposed.
• the phenomena that occur during laser irradiation can be considered as follows.
• the reaction layer (SnO 2 , ITO, etc.) is preferably a conductive layer that has higher conductivity than other layers included in the stacked structure.
• the reaction layer made of SnO 2 exhibits a higher resistance to laser irradiation under the conditions described below than the SiO 2 layer on the upper layer side (the outermost surface side) and than the ZrO 2 layer on the lower layer side.
• the energy corresponding to the bandgap where excitation occurs is small. Therefore, it tends to disappear most quickly due to sublimation/evaporation compared to the adjacent layers on the upper layer side and the lower layer side.
• the irradiation conditions should be controlled to take advantage of the delay until such damage occurs. This allows substantially only the reaction layer and the layers above it to be removed. It has been found that it is advantageous to select an ultrashort pulse laser, which will be described later, for such precise processing control.
• FIG. 12 is an explanatory diagram showing a schematic configuration example of a laser processing apparatus used in the method for manufacturing a spectacle lens according to the present embodiment.
• the laser processing apparatus used in this embodiment includes a laser light source section 21, an AOM (Acousto Optics Modulator) system section 22, a beam shaper section 23, a galvano scanner section 24, and an optical system 25, and is configured to irradiate the AR film 13 with laser light through these parts 21 to 25.
• AOM Acoustic Optics Modulator
• the laser light source section 21 emits laser light used for laser processing, and is configured to emit ultrashort pulse laser.
• the lower limit value of the pulse width of the ultrashort pulse laser is not particularly limited and may be any value exceeding 0 femtoseconds, but it may be 0.01 pico (10 femtoseconds) or more.
• the use of 0.1 picoseconds or more (including 1 picoseconds or more) is advantageous in terms of equipment maintenance and cost, and is more suitable for commercial use.
• a pulse width of 0.01 picoseconds or more and less than 100 picoseconds preferably a pulse width of 0.01 picoseconds or more and less than 50 picoseconds, more preferably a pulse width of 0.01 picoseconds or more and less than 50 picoseconds.
• 01 picoseconds or more and less than 15 picoseconds can also be used.
• a pulse width of 0.1 picoseconds or more and less than 100 picoseconds preferably a pulse width of 0.1 picoseconds or more and less than 50 picoseconds, and more preferably a pulse width of 0.1 picoseconds or more and less than 50 picoseconds.
• a time period of at least 1 second and less than 15 picoseconds can be used.
• the wavelength of the ultrashort pulse laser for example, in addition to 355 nm THG (Third Harmonic Generation) or 532 nm SHG (Second Harmonic Generation), a fundamental wavelength of 1064 nm can be used.
• the irradiation beam diameter can be selected depending on the desired processing design. In order to process fine designs with high resolution, it is effective to narrow down the beam diameter to a small size, but in this case, shorter wavelengths are more advantageous, so of the above wavelengths, 532 nm is preferable, and 355 nm is preferable. is more preferable. Alternatively, 266 nm FHG (Forth Harmonic Generation) is also suitable.
• the pulse energy of the ultrashort pulse laser is, for example, 0.1 ⁇ J or more and 30 ⁇ J or less (maximum about 60 ⁇ J) at 50 kHz.
• the beam diameter of the ultrashort pulse laser is, for example, 10 ⁇ m or more and 30 ⁇ m or less.
• 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. Shorter wavelengths are more advantageous in microfabrication. However, the production load is large in terms of equipment maintenance and cost.
• the pulse width of the ultrashort pulse laser is 0.1 picosecond or more and less than 1 picosecond Good processing can be performed at any wavelength from 266 to 1064 nm. A shorter wavelength is more advantageous in microfabrication.
• the pulse width of the ultrashort pulse laser is 1 picosecond or more and less than 100 picoseconds Good processing can be performed at any wavelength from 266 to 1064 nm. Shorter wavelengths are more advantageous in microfabrication.
• Non-uniform processing stability occurs depending on the applied wavelength. For example, if 266 nm, which is on the short wavelength side, is used as the applicable wavelength, the lower layer side is likely to be damaged along with the reaction of SnO 2 . Further, even at 355 nm, slight variations in irradiation conditions can cause loss of uniformity in processing, and it is not possible to prevent the phenomenon in which removal processing reaches layers below SnO 2 .
• the pulse width of the ultrashort pulse laser is 1 nanosecond or more. Processing that selectively removes SnO 2 and the layer on the surface side is not possible.
• the AOM system section 22 suppresses excessive irradiation of the laser light, which causes uneven processing during laser processing, by canceling the beam output of the laser light immediately after the operation of the galvano scanner section 24 starts and just before the end of the operation. It is.
• the beam shaper section 23 converts the laser beam from the laser light source section 21 from a Gaussian energy distribution to a top hat energy distribution, thereby making it possible to realize laser processing using a laser beam with a uniform energy distribution. It is. In particular, when a top hat type distribution is applied, stable and uniform processing can be achieved when a plurality of beam spots are partially overlapped to form a processing area of a predetermined area. This is because excessive local energy addition due to spot overlap is suppressed.
• the galvano scanner section 24 enables scanning by the laser light by moving the irradiation position of the laser light from the laser light source section 21 in two or three dimensions, thereby making it possible to mark a desired pattern by laser processing. It is intended to do so. It is assumed that the scannable range 4 of the laser beam by the galvano scanner unit 24 (that is, the maximum laser processing area) 4 is set to a size and shape that can completely encompass the outer shape of the eyeglass lens to be processed. (See Figure 8).
• the optical system 25 is configured by combining an optical lens such as a telecentric lens and a mirror, and guides the laser light from the laser light source section 21 so that it reaches the part to be processed on the eyeglass lens. be.
• the laser processing apparatus used in this embodiment is capable of defocusing the irradiation of laser light (i.e., ultrashort pulse laser) to the AR film 13 through the optical system 25, etc. It is configured so that it can be done in the settings.
• Defocus setting means that the focal position F of the laser beam to be irradiated is set to be a predetermined defocus distance away from the surface of the AR film 13, which is the part to be processed by the laser beam. If laser light is irradiated with such a defocus setting, the beam energy can be dispersed on the surface of the AR film 13 that is irradiated with the laser light, thereby making it possible to perform uniform film removal processing. becomes.
• the height of the irradiated area may vary due to the surface shape of the AR film 13.
• it is not necessarily limited to the defocus setting; for example, a focus setting in which the focal position F matches the surface of the AR film 13, or an in-focus setting in which the focal position F moves away in the opposite direction to the defocus setting.
• Laser light irradiation may also be performed.
• the spectacle lens For laser processing, first set the eyeglass lens to be processed into the laser processing device. At this time, the spectacle lens is set so that the optical surface of the spectacle lens, more specifically, the surface of the AR film 13 on the optical surface becomes the surface to be processed.
• the optical surface to be processed may be either the object-side surface or the eyeball-side surface, but here, for example, the eyeball-side surface is used as the processed surface.
• the laser light source section 21 and the galvano scanner section 24 are operated based on the pattern data prepared in advance (that is, the pattern data of a predetermined resolution created based on the decorative pattern to be obtained). make it work.
• the processing area of the surface to be processed of the eyeglass lens is irradiated with the ultrashort pulse laser in a pattern shape corresponding to the decoration pattern.
• the ultra-short pulse laser When the ultra-short pulse laser is irradiated, the ultra-short pulse laser passes through the water-repellent film 14 on the processed surface of the eyeglass lens and reaches the AR film 13 on the processed surface. When the ultra-short pulse laser reaches the AR film 13, non-heat processing by the ultra-short pulse laser will be performed on the AR film 13.
• the ablation process of this embodiment is a technology that allows highly energy-efficient processing using the multiphoton absorption phenomenon of an ultrashort pulse laser. More specifically, it is a removal process in which the influence of heat around the processed area is suppressed as much as possible, and the area irradiated with laser light instantly melts, evaporates, or sublimates and scatters. According to this type of non-heat processing, highly reactive materials are instantly removed at the irradiated area, so there is less heat influence on the area around the processing area, and processing that suppresses thermal damage (deformation due to heat, etc.) It can be performed.
• the laser processing according to this embodiment can be ablation processing as non-thermal processing.
• Such processing can give rise to multiphoton absorption processes (eg, two-photon absorption processes) that result in the multiphoton absorption phenomena mentioned above. Therefore, even materials that are relatively transparent (high transmittance) to the laser can be processed efficiently and favorably by multiphoton absorption.
• the range of applicable laser wavelengths is wide, and as the wavelength of the laser light, 1064 nm can be advantageously used in addition to 355 nm (THG) and 532 nm (SHG).
• the pulse width can be less than 100 picoseconds, preferably less than 50 picoseconds, and more preferably less than 1 picosecond (ie, femtosecond).
• the AR film 13 passes through SiO 2 of the multilayer structure constituting the AR film 13 and reaches the reaction layer (SnO 2 in this embodiment).
• the reaction layer instantly reacts and sublimates/evaporates, the outermost SiO 2 layer 13a is removed.
• the corresponding portion of the water-repellent film 14 is also removed.
• the ZrO 2 layer 13c located below the SnO 2 layer 13b is exposed at the irradiation location.
• the transmittance of visible light (wavelength 380 nm to 780 nm) of the border line 2M and the decorative pattern 3 should be 80% or more, for example, 80% to 95%, or 80 to 90%, or even 80 to 85%. Can be done.
• the value obtained by subtracting the visible light transmittance of the area other than both from the transmittance of visible light (wavelength 380 nm to 780 nm) of the border line 2M and the decorative pattern 3 is 20% or less, 15% or less, or It is 10% or less. With this configuration, even if both of them enter the wearer's field of vision, they are unlikely to interfere with the wearer's field of vision, and a wide and bright field of view can be obtained.
• FIG. 13(a) is an explanatory diagram showing an example of the main part configuration of the eyeglass lens according to the present embodiment.
• FIG. 13(b) shows a specific example of the observation results of a cross section of the AR film 13 using an electron microscope.
• the illustrated example is an enlarged display of portions A and B in FIG.
• the spectacle lens according to the present embodiment is configured by laminating an HC film 12, an AR film 13, and a water-repellent film 14 in this order on the optical surface of a lens base material 11.
• the AR film 13 has a multilayer structure in which a SiO 2 layer 13a, which is a low refractive index layer, and a SnO 2 layer 13b, and a ZrO 2 layer 13c, which are high refractive index layers, are laminated.
• the eyeglass lens according to the present embodiment has an unprocessed area 15 where the optical surface of the lens base material 11 is covered with the HC film 12, the AR film 13, and the water-repellent film 14, and the outermost SiO layer in the AR film 13.
• the second layer 13a, the SnO second layer 13b that is the layer immediately below it, and the water-repellent film 14 are partially removed, and the ZrO second layer 13cb, which is a high refractive index layer, is exposed in a laser scan area (patterned area). ) 16.
• the non-processing area 15 and the laser scanning area 16 are covered with a SiO 2 layer 13a on one side and a ZrO 2 layer 13c (or the reaction layer, which is a high refractive layer if a part of the reaction layer remains) on the other side. Since the SiO 2 layer 13a is exposed, the light reflectance of each layer differs depending on the presence or absence of the SiO 2 layer 13a. Therefore, when the spectacle lens is irradiated with illumination light, the pattern shape formed by the laser scan area 16 can be visually recognized. In other words, if the laser scan area 16 is formed in a pattern shape corresponding to the decoration pattern, the decoration pattern can be visually recognized. In this way, the removed portion of the predetermined layer of the AR film 13 can be used as a part of a decorative pattern.
• the reflectance of the border line 2M and the decorative pattern 3 is higher than the reflectance of areas other than both. That is, both may be constructed by exposing the ZrO 2 layer 13c, which is a high refractive index layer.
• the laser scan area 16 constituting the decorative pattern is formed by removing the SiO 2 layer 13a, which is the outermost layer of the AR film 13, and the SnO 2 layer 13b, which is the layer immediately below it. In other words, the object to be removed is stopped at a predetermined layer containing SnO 2 which is a reaction layer. Therefore, it is possible to suppress peeling of each layer of the multilayer structure constituting the AR film 13 due to the formation of the laser scan region 16.
• Removal of the SiO 2 layer 13a, which is the outermost layer of the AR film 13 can be achieved by non-heat processing using ultrashort pulse laser irradiation, as described above. According to such non-heat processing, there is little thermal influence on the periphery of the processing location, and it is possible to suppress the occurrence of thermal damage.
• predetermined pulse width stable processing can be performed while suppressing damage to layers below the reaction layer.As a result, the ZrO 2 layer 13c as a high refractive index layer is exposed. , damage to the exposed surface of the ZrO 2 layer 13c can be suppressed.
• the film thicknesses of the SiO 2 layer 13a, the SnO 2 layer 13b, the ZrO 2 layer 13c, etc. can be determined by acquiring an electron microscope image of a cross section of the AR film 13 and analyzing the acquired image.
• FIG. 13(b) shows a specific example of the observation results of a cross section of the AR film 13 using an electron microscope.
• the illustrated example is an enlarged display of portions A and B in FIG.
• a SiO 2 layer 13a, a SnO 2 layer 13b, and a ZrO 2 layer 13c are laminated, but since the SnO 2 layer 13b is thin (for example, about 5 nm), it is difficult to recognize it in the image. It has become.
• the SnO 2 layer 13b and the SiO 2 on the surface side thereof are removed, thereby exposing the ZrO 2 layer 13c.
• the thickness t1 of the laser scan area 16 and the thickness t1 of the non-processed area 15 are It can be seen that there is no significant difference between the thicknesses of the portions and the thickness t2. More specifically, the ratio t1/t2 of the thickness t1 of the removed portion to the thickness t2 of the non-removed portion is, for example, in the range of 0.90 to 1.00, preferably 0.95 to 1.00. It is within the range of 00 or less, more preferably within the range of 0.99 or more and 1.00 or less.
• the laser scan region 16 is formed by non-heat processing using ultra-short pulse laser irradiation, and no damage is caused to the underlying ZrO 2 layer 13c. This means that if the ratio t1/t2 of the thickness of the exposed ZrO 2 layer 13c is within the above range, the laser scan region 16 is formed without damaging the ZrO 2 layer 13c. This means that it can be assumed that the formation of the laser scan area 16 was performed using non-heat processing using an ultrashort pulse laser.
• the reason why no damage occurs to the ZnO 2 layer 13 is because the reactivity of the reaction layer (here, the SnO 2 layer) by the ultrashort pulse laser is higher than that of ZnO 2 . This difference in reactivity can be significantly obtained by applying an ultrashort pulse laser having a predetermined pulse width, as will be described later.
• the thickness of the ZrO 2 layer is at least 10 times, preferably 15 times or more, the thickness of the SnO 2 layer, even if the ZrO 2 layer is slightly thinned after the SnO 2 layer disappears, , there is no risk of film peeling or impact on the visibility of the decorative pattern.
• the melting point of SnO 2 is about 1127° C., which is lower than that of SiO 2 on the upper layer side and lower than that of ZrO 2 on the lower layer side, which is also considered to be involved in the ease of control of ablation.
• the spectacle lens configured as described above, even if a decorative pattern is marked, peeling of each layer constituting the multilayered AR film 13 can be suppressed, and the exposed ZrO 2 layer can be prevented from peeling off. No damage will be caused to 13c. Therefore, even when applied to eyeglass lens products, it is possible to mark the eyeglass lenses with a decorative pattern without deteriorating the quality of the product.
• reaction layer (SnO 2 in the above embodiment) of the AR film 13 and the surface thereof are By partially removing the side layer and thereby exposing the ZrO 2 layer 13c, which is a high refractive index layer, a decorative pattern is marked on the eyeglass lens.
• non-heat processing is performed by irradiation with an ultra-short pulse laser to partially remove the reaction layer (SnO 2 in the above embodiment) of the AR film 13 and the layer on the surface side thereof, This exposes the ZrO 2 layer 13c, which is a high refractive index layer, thereby marking the spectacle lens with a decorative pattern.
• the removal processing is performed by the effect of the pulse width rather than the absorption energy effect of the laser beam, only a predetermined layer including the SiO 2 layer 13a, which is the outermost layer of the AR film 13, is selectively removed. This makes it possible to remove the particles uniformly.
• it is a non-heating process it is possible to suppress thermal damage around the processed area, thereby suppressing damage to the exposed surface of the ZrO 2 layer 13c on the lower side of the reaction layer. can do.
• the eyeglass lens is Mark the decorative pattern. Therefore, according to the present embodiment, peeling of each layer of the AR film 13 can be suppressed, and damage to the exposed ZrO 2 layer 13c can be prevented, so that it can be applied to eyeglass lens products. Even in cases where the eyeglass lenses are marked with a decorative pattern, it is possible to mark the eyeglass lenses without deteriorating the quality of the product.
• the pulse width of the ultrashort pulse laser may be any width exceeding 0 femtoseconds, but is preferably at least 0.01 picoseconds (10 femtoseconds) and less than 100 picoseconds; .1 picosecond or longer (including 1 picosecond or longer) is advantageous in terms of equipment maintenance and cost, and is more suitable for commercial use. More specifically, the laser irradiation conditions have the following advantages depending on the pulse width. (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. Shorter wavelengths are more advantageous in microfabrication. However, the production load is large in terms of equipment maintenance and cost.
• the AR film 13 is irradiated with the ultra-short pulse laser in a defocused setting. If laser light is irradiated with such a defocus setting, the beam energy can be dispersed on the surface of the AR film 13 that is irradiated with the laser light, thereby making it possible to perform uniform film removal processing. becomes. This is particularly useful when the height of the irradiated area may vary due to the surface shape of the AR film 13.
• the ratio t1/t2 of the thickness t1 of the ZrO 2 layer 13c at the removed portion and the thickness t2 of the ZrO 2 layer 13c at the non-removed portion such as the SiO 2 layer 13a is, for example, 0.90 or more. It falls within the range of 1.00 or less, preferably within the range of 0.95 or more and 1.00 or less, more preferably within the range of 0.99 or more and 1.00 or less.
• non-heating processing using an ultra-short pulse laser can be used as long as it is used to form some kind of pattern on the optical surface of an optical member, and it can be applied to markings other than the border line 2M (and decorative pattern 3) in exactly the same way. It is possible to apply.
• the outermost layer of the AR film 13 is the SiO 2 layer 13a as a low refractive index layer, and the layer below the SiO 2 layer 13a is the SnO 2 layer 13b as a high refractive index layer.
• the ZrO 2 layer 13c as a high refractive index layer on the lower layer side, and when SnO 2 reacts with laser irradiation and is partially removed, SiO 2 is also removed, thereby creating a high refractive index layer.
• the ZrO 2 layer 13c as a layer is exposed has been exemplified, the present invention is not limited thereto.
• the AR film 13 may be configured by laminating layers other than the SiO 2 layer 13a, the SnO 2 layer 13b, and the ZrO 2 layer 13c. Further, the outermost layer of the AR film 13 may be a layer other than the SiO 2 layer 13a as long as it is a low refractive index layer.
• the high refractive index layer may be other than the SnO 2 layer 13b or the ZrO 2 layer 13c. For example, as for the SnO 2 layer 13b as the reaction layer, a thin ITO layer having conductivity may be used instead of the SnO 2 layer 13b.
• the SnO 2 layer, which is the reaction layer included in the AR film 13, and the SiO 2 layer 13a, which is the outermost layer immediately above the SnO 2 layer, are removed by non-heat processing using an ultrashort pulse laser.
• the case is given as an example. This has the effect of suppressing film peeling, as described above.
• non-heat processing using an ultrashort pulse laser so as to remove a plurality of predetermined layers including the outermost layer.
• non-heating processing using an ultrashort pulse laser can suppress damage to the exposed surface of the layer that will be exposed by removal, so removal processing is possible. It is also possible to suppress the decrease in film thickness caused by this.
• the ratio t1/t2 of the thickness t1 of the removed portion to the thickness t2 of the non-removed portion for the layer immediately below the removed layer is, for example, , within the range of 0.90 or more and 1.00 or less, preferably within the range of 0.95 or more and 1.00 or less, and more preferably within the range of 0.99 or more and 1.00 or less.
• the eyeglass lens before laser processing in this embodiment may be provided with an antireflection film on both sides.
• a specific example of the eyeglass lens includes the content described in International Publication No. WO2020/067407. The entire description of this publication can be referred to herein.
• the spectacle lenses having the configurations of Examples 1 and 2 described in the publication (Example 1 to name one) may be employed as a specific example.
• a specific example of the spectacle lens before decoration in this embodiment is as follows.
• eyeglass lenses comprising a multilayer film on both sides of a lens base material,
• the sum of the average reflectances in the wavelength band of 360 to 400 nm on each surface of the eyeglass lens is 6.0% or less,
• the sum of the average reflectances in the wavelength band of 400 to 440 nm on each surface of the eyeglass lens is 20.0% or more,
• the spectacle lens has a sum of average reflectances in a wavelength band of 480 to 680 nm on each surface of the spectacle lens of 2.0% or less.
• the sum of the average reflectances of each surface should be 20.0% or more (preferably more than 20.0%, more preferably more than 20.0%). 25.0% or more). In other words, the reflectance is locally increased in the purple region.
• the sum of the average reflectances of each surface should be 6.0% or less (preferably less than 6.0%, more preferably 5.0%). (below), and the reflectance is locally decreased, contrary to the case in the violet region (400 to 440 nm).
• the sum of the average reflectances of each surface is 2.0% or less (preferably less than 2.0%, more preferably 1 .5% or less), and in order to aim at transmitting visible light, the reflectance is particularly locally reduced in the main wavelength band of visible light.
• the eyeglass lens of this specific example has a blocking effect against light in the blue region, that is, has a high reflectance for light in the blue region. Therefore, when the spectacle lens 1 is viewed from a third person facing the front of the wearer of the spectacle lens 1, the spectacle lens appears blue.
• the area where the laser processing was performed appears to be the color of the layer exposed by the laser processing (in this one specific example, the color of the ZrO 2 layer is yellow, gold, or silver).
• the decorative pattern 3 on the spectacle lens 1 fitted into the frame appears to stand out against the blue background.
• a decorative pattern 3 with a high design effect can be obtained.
• the background is not blue, that is, when the reflectance of light in the blue region is not high but the reflectance of light in other color regions is high.
• the eyeglass lens 1 may be green or pearl-colored.
• the aspect of good contrast during visual recognition of the above decorative pattern 3 can be achieved by laser processing each multilayer film on the object side surface of the eyeglass lens or by laser processing each multilayer film on the eyeball side surface. is also possible.
• the spectacle lens provided with the decorative pattern 3 of this embodiment does not impede the wearer's clear vision.
• the portion where the border line or decorative pattern is formed has a high transmittance to visible light, and the difference in transmittance from the portion without the decorative pattern is small, so it is easy for the wearer to Even if it comes into view, its existence is virtually unrecognizable.
• this embodiment when this embodiment is applied to rimless or half-rim glasses, the following advantages can be obtained. That is, while applying a rimless or half rim, it is also possible to draw a pseudo rim near the outer edge of the lens using a coloring material such as a known pigment, or create a pseudo rim by forming irregularities on the lens surface.
• the edging line of this embodiment formed by the laser irradiation described above prevents the limitations experienced with glasses with rims, such as the impression that the field of view is defined in a certain area, and the rim that limits the outer edge of the field of view. It is advantageous in that it is free from the restrictive feeling of wearing it, such as feeling dark, and allows a wide and bright field of vision.
• the wearer's lens when observing the wearer's lens from another person (that is, when observing the wearer's lens from the object plane side), it is necessary to set a predetermined relative position (or angle) with respect to indoor illumination light or sunlight. ), the decorative pattern 3 is clearly visible, but when it is not in the above relative position, it is difficult to see. Therefore, the lens can be given added value in terms of design due to changes in visibility, such as the predetermined decorative pattern 3 appearing clearly or almost disappearing.
• the lens is recognized as a normal clear lens (or a predetermined color lens, photochromic lens, or polarized lens) when viewed by another person. Therefore, unlike glasses with rims, a part of the wearer's face is not blocked or cast by the rim, and the wearer's face can be seen brightly.
• the decorative pattern 3 of this embodiment is formed within the frame-cut lens area, it can carry desired characters, symbols, or designs on the lens, or create a desired design without affecting the function of the glasses. It can also be applied to lenses.
• the decorative pattern 3 of this embodiment is a process that can be visually recognized both from the processed surface side of the lens and from the back surface side.
• the designed anti-reflection property is reduced in the removed area where a part is removed (in this embodiment, SnO 2 and SiO 2 on the upper layer side are removed), and the gap between the area and the non-removed area is reduced. This is because contrast in the amount of reflected light can be obtained.
• This embodiment has a major feature in that the lens shape is provided with a border line. If we pay attention to this point, it is no longer essential that the border line be configured to partially expose the antireflection film. From this point of view, the present embodiment can also be expressed as follows. The following expressions may be combined with each of the configurations described so far. "An eyeglass lens that has not yet been cut into a spherical shape to be attached to a frame, The eyeglass lens is marked with a border line that frames the outline of the spherical shape from the inside, which is the planned cutting position. ⁇ A pair of eyeglasses comprising a frame and eyeglass lenses marked with a border line that frames the outer edge.''

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• 2023
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