EP3877805A1 - Method for producing a spectacle lens - Google Patents
Method for producing a spectacle lensInfo
- Publication number
- EP3877805A1 EP3877805A1 EP19797205.2A EP19797205A EP3877805A1 EP 3877805 A1 EP3877805 A1 EP 3877805A1 EP 19797205 A EP19797205 A EP 19797205A EP 3877805 A1 EP3877805 A1 EP 3877805A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- edge
- edge structure
- spectacle lens
- light
- layer
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Withdrawn
Links
Classifications
-
- G—PHYSICS
- G02—OPTICS
- G02C—SPECTACLES; SUNGLASSES OR GOGGLES INSOFAR AS THEY HAVE THE SAME FEATURES AS SPECTACLES; CONTACT LENSES
- G02C7/00—Optical parts
- G02C7/02—Lenses; Lens systems ; Methods of designing lenses
- G02C7/024—Methods of designing ophthalmic lenses
- G02C7/028—Special mathematical design techniques
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29D—PRODUCING PARTICULAR ARTICLES FROM PLASTICS OR FROM SUBSTANCES IN A PLASTIC STATE
- B29D11/00—Producing optical elements, e.g. lenses or prisms
- B29D11/00009—Production of simple or compound lenses
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29D—PRODUCING PARTICULAR ARTICLES FROM PLASTICS OR FROM SUBSTANCES IN A PLASTIC STATE
- B29D11/00—Producing optical elements, e.g. lenses or prisms
- B29D11/00865—Applying coatings; tinting; colouring
-
- G—PHYSICS
- G02—OPTICS
- G02C—SPECTACLES; SUNGLASSES OR GOGGLES INSOFAR AS THEY HAVE THE SAME FEATURES AS SPECTACLES; CONTACT LENSES
- G02C1/00—Assemblies of lenses with bridges or browbars
- G02C1/10—Special mounting grooves in the rim or on the lens
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F30/00—Computer-aided design [CAD]
- G06F30/10—Geometric CAD
Definitions
- the invention relates to a method for producing a spectacle lens, in which an edge structure is produced on the spectacle lens.
- the invention thus also relates to the spectacle lens produced by the method, in particular one with a cross section perpendicular to the optical axis, which corresponds to a spectacle lens opening of a selected spectacle frame or, in the case of rimless or partially framed spectacles, of a selected shape.
- a spectacle lens with an edge structure is usually made of one
- edge structure encompasses every possible one
- the spectacle lens with the edge structure is essentially the ready-to-use spectacle lens.
- edge and “edge structure” are used synonymously in the context of this description, since the edge of a ready-to-use spectacle lens as
- edge structure is understood to mean structured areas along the edge of an eyeglass lens that are produced during the edge processing of the eyeglass lens.
- an edge structure e.g. also serve to avoid collisions with the eyeglass frame (e.g. "shelf" for sports glasses, Figure 1), the
- Eyeglass lens structure have their origin by reflection and / or transmission.
- the light can e.g. in rimless glasses, enter the inside of the lens through the edge or its edge structure itself, FIG. 4a, or
- the edge is illuminated from the front through the glass, FIG. 4b.
- the light coming from the edge is reflected internally in the lens until it emerges again through the front surface of the lens.
- these light effects are reflected in the form of reflections of the edge for a viewer, figures 5.
- myopia rings M Glasses wearers can be severely affected. Since this effect occurs primarily in spectacle wearers with myopia (nearsightedness), the effect is referred to as myopia rings, shown as myopia rings M in FIG.
- FIG. 5b Shown in FIG. 5b are reflections RFR on the rear side of the facet for spectacle lenses with -3dpt and in FIG. 5c reflections RFF on the front
- Light effects can arise from reflections on the outside of the edge structure that is not covered by the frame, FIG. 6, or they arise on the inside of the facet that is covered from the outside by the frame, FIG. 7.
- the spectacle lens can, depending on the geometric shape of the spectacle lens, either via the front surface, FIG. 8, or, e.g. with rimless glasses, leave again over the uncovered edge of the lens.
- the reflections are visible to the viewer in the spectacle lens
- the second case bright spots on the face of the spectacle wearer, which are illuminated by the reflections in the spectacle lens, can be seen.
- Light spots on the face of the spectacle wearer can also be seen when light falls through the front surface of rimless or semi-rimless glasses and is guided in the lens to an exit point on the rim of the lens, FIG. 9.
- Back surface can leave the lens. In this case, they don't just have Effects on aesthetics, but can also impair the visual impression and thus the actual function of the glasses due to glare or disturbing reflections.
- the tint of the edge after the edge processing by immersing the lens in a color bath can also be used in this context. Either the entire glass or only the edge area is tinted to reduce the lighting effects. Since tints in the optics must always allow transmission, opaque layers are not possible. Furthermore, the tinting of the edge is only possible in combination with specifically selected layers on the front and back surface. If the entire glass is to be tinted after the edge processing, the layer system on the front and rear surface (hard coat, if necessary
- Anti-reflective layer etc. be designed so that the tinting agent in this
- Layers can penetrate and the same color as on the uncoated edge surface. If only the edge, but not the front and back surface, is to be tinted, this surface must not accept the dye.
- the tinting of the edge is complex, since a separate color bath must be set up for each color and glass material. The method is therefore not used in practice or only in exceptional cases.
- the document US 2003/0011742 A1 describes a spectacle lens with a colored lens rim in order to avoid the negative effect of the white rings visible from the outside, which are created by the visibility of the foot of the connecting element (pointed facet) at the glass edge, to reduce or avoid the aesthetics of the glasses.
- single or multi-colored coatings of the glass rim are proposed, which cover at least a part of the glass rim and can correspond to the color of the spectacle frame as well as a color that does not correspond to the color of the spectacle frame. It will continue to be a trial
- an automated paint application system which selects a suitable color on the basis of input data or on the basis of a sensor measurement and then uses one of the abovementioned ones
- this object is achieved in that light effects to be expected, which are caused or at least influenced by the edge structure of the spectacle lens, in particular light reflections and / or light transmissions, are determined for the spectacle lens having the edge structure and the light effects determined are reduced, in particular with regard to their intensity and / or direction and / or color through which
- the at least one layer applied to the edge structure achieves according to the invention to change the optical properties of light effects created on or through the spectacle lens edge in such a way that the light effect or effects are at least reduced, are preferably eliminated compared to a spectacle lens without coating the edge structure.
- This is achieved in particular in that the coating engages in the beam path of the light which penetrates the spectacle lens and thus also interferes with the formation of the light effects in the same way as the edge structure. In particular, this should create a desired aesthetic impression of the glasses and the glasses wearer. Furthermore, the impairment of the
- Refraction of light can be reduced or ideally prevented entirely.
- the essential advantage of the invention is that the expected light effects for the edge-structured spectacle lens can be determined before the edge-structured spectacle lens is manufactured. Thus, the occurrence of light effects can be determined even before production and reduced or prevented with the coating, in particular in comparison to the edge-structured one Spectacle lens without coating.
- the coating can preferably be carried out as a function of the light effect or effects determined.
- a different type of coating can be assigned to light effects, which is to be carried out on the edge structure.
- the invention can preferably provide that the light effects are determined theoretically, in particular by means of a computer-based simulation or a table, depending on the data of the edge structure
- the spectacle lens with its edge structure and / or the frame it is sufficient for the spectacle lens with its edge structure and / or the frame to be accommodated to be represented in data. On the basis of this data, the spectacle lens is simulated, in particular in connection with a frame, and the occurrence of light effects is also determined with the simulation.
- the determination of the lighting effects can e.g. in dependence of
- Spectacle lens data and / or frame data take place, in particular depending on the glass thickness, preferably the glass thickness at the edge, the glass material, in particular its refractive index, the curvature of the front and rear surfaces, the tint and / or the coating and / or depending on the glass thickness, preferably the glass thickness at the edge, the glass material, in particular its refractive index, the curvature of the front and rear surfaces, the tint and / or the coating and / or depending on the
- the coating according to the invention can then be used to influence a determined light effect or several and in its intensity, direction and / or color by applying one or more layers to the edge of the spectacle lens in such a way that the effect is reduced, preferably eliminated, and in particular thereby a desired one
- the influence of the light effects emanating from the edge on the aesthetics is significantly influenced by the internal reflections in the lens and the size and position of the edge. Such internal reflections in particular can be influenced by the coating according to the invention, albeit this
- Coating is done on the outside of the glass rim.
- E.g. can be coated with a light-absorbing coating agent, the
- Refractive index equal or greater, or at least comparable to that
- Coating material is prevented and the light can cross the boundary layer and enter the absorbent material where it is absorbed.
- myopia rings occur primarily in so-called minus glasses (diverging lenses). Plus glasses (converging lenses) do not show this phenomenon or only in special cases.
- the general visibility of the myopia rings is strongly dependent on the direction - these light effects can only be recognized by the viewer from a certain viewing angle, Figure 10.
- myopia rings are not visible in position P1 and visible in position P2. The size of this
- Viewing angle is determined by the reflections taking place in the lens and in particular by the curvatures of the front and back surfaces of the lens.
- a coating according to the invention is therefore particularly suitable for reducing or even preventing the occurrence of myopia rings.
- the visibility of the myopia rings is still significantly influenced by the edge thickness of the lens. This in turn depends on the thickness of the glass and the size and shape of the frame. Smaller frames generally result in a thinner frame edge and this in turn leads to reduced visibility of the myopia rings. Higher myopia also leads to larger one
- Edge strengths with comparable effects Glasses with an astigmatism or prism correction can, depending on the angular position of the optical cylinder and the Frame shape have very different edge thickness distributions. Light effects can then occur in unusual places.
- the expected effects of spectacle lens data and / or frame data in particular of glass material (refractive index) and / or the glass thickness and / or the curvatures of the front and / or back curve and / or the frame shape can be provided with the aid of the regularities of the geometric Determine optics.
- These laws can be implemented in a computer program executing the simulation.
- the calculations for carrying out the simulation can preferably also be carried out as a function of the incidence of light.
- the calculations for carrying out the simulation can preferably also be carried out as a function of the incidence of light.
- it offers itself, of those that occur mainly in everyday life
- Lighting conditions go out.
- Directional and diffuse lighting from above and diffuse lighting from the front are reasonable assumptions for the incidence of light.
- Decision criterion for an automatic process control can be used, in particular depending on this criterion the location of the
- Coating on the edge structure and / or the thickness of the coating can be determined.
- the invention can provide in a further development that before the actual application of a layer to the edge structure, the application of the layer is simulated in a computer-based manner and then the resulting light effects to be expected are determined on a computer-based basis.
- the light effects can preferably be without a layer and with at least one layer on the
- the edge structure of the lens is determined and compared with one another.
- a user of the simulation program can specify or change areas to be coated manually and / or layer thicknesses and / or material of the layer and compare the simulated light effects with the layer specified in this way, e.g. visually on a graphical representation of the lighting effects, with the simulated lighting effects without coating.
- the user can thus determine and determine when he is satisfied with the result of the coating and based on the data that the simulated
- Coating represent an eyeglass lens with a structured edge and the coating thus defined can be manufactured or manufactured. For example, they can obtained manufacturing data to a manufacturing machine, in particular an edge processing device and coating system are transmitted.
- it can also be provided to automate the simulation of the layer application and the resulting light effects in one iteration
- a termination criterion e.g. the minimum intensity of the effect.
- the shift application is automatically specified and changed until the termination criterion is met.
- the necessary arrangement of the layer determined by the simulation, in particular iterated simulation, can then be made specifically on the spectacle lens in order to influence the light effects in reality on the spectacle lens according to the simulation, that is, preferably to at least reduce, particularly preferably to eliminate.
- Manufacturing facility may be provided, as previously described.
- results thus obtained can e.g. be used on the one hand to select a suitable coating material and to determine the local distribution of the coating material, but on the other hand preferably also to serve the customer with a suitable graphic
- Versions can also be used as part of computer-aided customer advice.
- the invention can provide that the computer-based
- Simulation of the light effects and / or the edge structure coating comprises a graphic representation of the light effects, in particular in superimposition with the pictorial representation of the face of the spectacle wearer.
- the effect of the coating on the spectacle wearer can thus be checked particularly well, particularly before the spectacle lens is actually manufactured.
- the rim of the frame in combination with the width of the rim of the spectacle lens can lead to undesirable reflections on the front facet foot (FIG. 6) or there may be more in the protruding glass rim behind the rim of the frame
- the intensity of the light effects can be influenced by tints and / or coatings on the front and rear surfaces. These parameters can also be taken into account as data in a simulation using software. While coatings lead to a reduction in internal and external
- Reflections tints dampen the light effects and change the color impression for the viewer.
- the color and effects of the coating can be selected appropriately.
- the color of the frame, the face color of the customer, the fashion type and the aesthetic wishes of the customer can be taken into account when choosing a color and color combination.
- the coating can be applied to the edge or the edge structure over the entire surface or on partial surfaces. If, for example, significant light effects are expected through the back of the facet in the case of plus glasses, FIG. 7, it makes sense to provide only this partial area of the edge with a corresponding layer. This means that the coating remains on the outside of a full-rim frame
- the invention can therefore only provide those partial regions of the edge structure which predominantly influence the effect to be reduced.
- the pointed facet can preferably be provided with a highly absorbent layer and / or the edge surfaces in front of and behind the pointed facet can be provided with a tinted, partially permeable layer. If the tint is preferably chosen in a skin tone, the
- protruding edges when viewed from the side and looking through are significantly less noticeable, while as much light as possible is absorbed in the area of the facet hidden by the frame edge.
- coatings can be provided with a
- Coating covering colors or a highly smooth surface are aimed for. In this way, especially with suitable pigmentation, a
- the viscosity and / or surface tension of the coating agent to be applied is preferably selected such that the agent runs independently and forms a smooth surface. Furthermore, coatings with this thickness mentioned above can preferably be subjected to such high loads that a further protective coating is not necessary and can therefore be dispensed with.
- the edge processing of the lenses must be carried out with high precision. If layers with the above-mentioned thickness values are applied to finished spectacle lenses, the lenses become too large by this amount and in many cases can no longer be mounted in the frame.
- the glasses are then made smaller than necessary, in particular by the correction value, such as made smaller by the determined layer thickness, and only reach the necessary size together with the coating.
- a particularly advantageous embodiment of the invention can be achieved if glasses for full-rim frames that require a pointed facet are manufactured in a first step by means of mechanical processing without the pointed facet, only with a simple flat facet.
- the flat facet can then be provided with the desired coating.
- an elastic, centering structure is then applied in a third method step, as is known from DE 10 2014 000 107 B4.
- the advantages of this process lie in the simpler coating of the flat facet and in the elastic properties of the applied elastic structure.
- the elastic structure can be preferred by the
- the elastic, centering structure is colored with absorbent pigments.
- the same effect can be achieved as with the solution described above.
- Edge areas of the glass that protrude beyond the frame edge can of course also use other colors, color combinations or effect colors (e.g.
- simulating calculation program proposed a set of rules or tables. This table work describes in particular that for the
- Calculations the occurrence and the expected visibility of the myopia rings can be determined.
- the results obtained with the help of the geometric optics are processed in such a way that, depending on spectacle lens data and / or frame data, e.g. from the glass thickness, the refractive index, the curvature of the front and back surface and the frame size, a prediction about the myopia rings is possible or, alternatively, a statement about the aesthetically acceptable frame size.
Landscapes
- Physics & Mathematics (AREA)
- Health & Medical Sciences (AREA)
- Ophthalmology & Optometry (AREA)
- Engineering & Computer Science (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Geometry (AREA)
- Theoretical Computer Science (AREA)
- Mathematical Physics (AREA)
- General Health & Medical Sciences (AREA)
- Mechanical Engineering (AREA)
- Manufacturing & Machinery (AREA)
- Mathematical Optimization (AREA)
- Computer Hardware Design (AREA)
- Evolutionary Computation (AREA)
- General Engineering & Computer Science (AREA)
- Pure & Applied Mathematics (AREA)
- Mathematical Analysis (AREA)
- Computational Mathematics (AREA)
- Eyeglasses (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102018008669.1A DE102018008669A1 (en) | 2018-11-05 | 2018-11-05 | Process for the manufacture of spectacle lenses |
PCT/EP2019/079146 WO2020094424A1 (en) | 2018-11-05 | 2019-10-25 | Method for producing a spectacle lens |
Publications (1)
Publication Number | Publication Date |
---|---|
EP3877805A1 true EP3877805A1 (en) | 2021-09-15 |
Family
ID=68424857
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP19797205.2A Withdrawn EP3877805A1 (en) | 2018-11-05 | 2019-10-25 | Method for producing a spectacle lens |
Country Status (5)
Country | Link |
---|---|
US (1) | US20220050307A1 (en) |
EP (1) | EP3877805A1 (en) |
CN (1) | CN113168025A (en) |
DE (1) | DE102018008669A1 (en) |
WO (1) | WO2020094424A1 (en) |
Family Cites Families (14)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US1507327A (en) * | 1922-08-11 | 1924-09-02 | American Optical Corp | Process of coating edges of lenses |
JPS52102049A (en) * | 1976-02-23 | 1977-08-26 | Hoya Lens Co Ltd | Method of keeping added strength of spectacle lens |
US6786596B1 (en) * | 2000-07-21 | 2004-09-07 | Abby Ayoub | Optical lens coating |
US20030011742A1 (en) | 2000-07-21 | 2003-01-16 | Abby Ayoub | Rapid application optical lens coatings and methods |
AU2001293495B2 (en) * | 2000-09-29 | 2005-04-07 | Carl Zeiss Vision Australia Holdings Ltd | Edge coated ophthalmic lenses |
FR2828564A1 (en) * | 2001-08-08 | 2003-02-14 | Olivier Bataillard | Elimination of concentric myopic iridescence in optical lenses, by coating lens edges with acrylic paint after grinding |
CA2727809A1 (en) * | 2008-06-13 | 2009-12-17 | Gunnar Optiks, Llc | Low-power eyewear for reducing symptoms of computer vision syndrome |
EP2607884A1 (en) * | 2011-12-23 | 2013-06-26 | Essilor International (Compagnie Générale d'Optique) | Eyeglass rating with respect to protection against uv hazard |
JP6099232B2 (en) * | 2013-08-22 | 2017-03-22 | ビスポーク, インコーポレイテッド | Method and system for creating custom products |
DE102014000107B4 (en) * | 2014-01-10 | 2016-04-07 | Technische Hochschule Köln | Method for glazing a spectacle frame |
EP3241082B1 (en) * | 2014-12-31 | 2023-02-15 | Essilor International | Ophthalmic lens edging process by calculation |
JP6758295B2 (en) * | 2014-12-31 | 2020-09-23 | エシロール エンテルナショナル | Eyeglass eye lenses to be framed in eyeglass frames |
GB2564656A (en) * | 2017-07-17 | 2019-01-23 | Shuabe Khan Mohammed | A spectacle lens |
WO2019180043A1 (en) * | 2018-03-20 | 2019-09-26 | Essilor International | Eyewear comprising an ophthalmic lens having an edge coating |
-
2018
- 2018-11-05 DE DE102018008669.1A patent/DE102018008669A1/en not_active Withdrawn
-
2019
- 2019-10-25 CN CN201980071981.XA patent/CN113168025A/en active Pending
- 2019-10-25 EP EP19797205.2A patent/EP3877805A1/en not_active Withdrawn
- 2019-10-25 US US17/274,807 patent/US20220050307A1/en active Pending
- 2019-10-25 WO PCT/EP2019/079146 patent/WO2020094424A1/en unknown
Also Published As
Publication number | Publication date |
---|---|
WO2020094424A1 (en) | 2020-05-14 |
DE102018008669A1 (en) | 2020-05-07 |
CN113168025A (en) | 2021-07-23 |
US20220050307A1 (en) | 2022-02-17 |
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Inventor name: ALT, HERGER Inventor name: TUSS, CHRISTIAN Inventor name: KREIS, MICHAEL Inventor name: POEPPERL, CHRISTIAN Inventor name: LUDERICH, JOERG |
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