EP4519073A1 - Verfahren zum versehen eines substrats mit einer einfärbung und einer funktionsfärbung - Google Patents
Verfahren zum versehen eines substrats mit einer einfärbung und einer funktionsfärbungInfo
- Publication number
- EP4519073A1 EP4519073A1 EP23721627.0A EP23721627A EP4519073A1 EP 4519073 A1 EP4519073 A1 EP 4519073A1 EP 23721627 A EP23721627 A EP 23721627A EP 4519073 A1 EP4519073 A1 EP 4519073A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- substrate
- coloring
- functional
- main
- color
- 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.)
- Pending
Links
Classifications
-
- 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
- B29D11/00923—Applying coatings; tinting; colouring on lens surfaces for colouring or tinting
-
- 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
- B29D11/00634—Production of filters
- B29D11/00653—Production of filters photochromic
-
- 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
- B29D11/00894—Applying coatings; tinting; colouring colouring or tinting
- B29D11/00903—Applying coatings; tinting; colouring colouring or tinting on the surface
-
- G—PHYSICS
- G02—OPTICS
- G02C—SPECTACLES; SUNGLASSES OR GOGGLES INSOFAR AS THEY HAVE THE SAME FEATURES AS SPECTACLES; CONTACT LENSES
- G02C7/00—Optical parts
- G02C7/10—Filters, e.g. for facilitating adaptation of the eyes to the dark; Sunglasses
- G02C7/102—Photochromic filters
-
- G—PHYSICS
- G02—OPTICS
- G02C—SPECTACLES; SUNGLASSES OR GOGGLES INSOFAR AS THEY HAVE THE SAME FEATURES AS SPECTACLES; CONTACT LENSES
- G02C7/00—Optical parts
- G02C7/10—Filters, e.g. for facilitating adaptation of the eyes to the dark; Sunglasses
- G02C7/108—Colouring materials
Definitions
- the present invention relates to a method for providing a substrate with a coloring and a functional coloring.
- Self-tinting lenses can react to UV light.
- the lens has a dark or light tint.
- the darkening or brightening of the lens is made possible by a functional coloring with which the lens is provided.
- the functional coloring is caused by a photochromic dye, which reacts to irradiation with UV light with a reversible change in its molecular structure and thus also its absorption behavior.
- the photochromic dye returns to its original molecular structure and thus also its original absorption behavior.
- a photochromic dye thus enables reversible switching back and forth between a dark and a light shade.
- the lens can also be colored. Coloring gives the lens a specific color, which is particularly desirable for sunglasses. In contrast to functional coloring, coloring uses dyes which - apart from their absorption properties - have no functional properties and are referred to as non-functional dyes.
- the functional coloring is introduced directly into the glass material or applied to the glass material in the form of an additional layer, for example by spin coating.
- the coloring of glass materials pretreated in this way is often not reproducible.
- coloring improves the functional color Exercise is impaired because the areas of the electromagnetic spectrum necessary for darkening are absorbed by the non-functional dye of the coloring and are therefore not available to the photochromic dye of the functional coloring.
- the present invention is based on the object of providing a method which allows a substrate to be provided with a color in addition to a functional color, the method to be provided being intended to enable reproducible coloring of the substrate without impairing its functional color.
- a method for providing a substrate with a coloring and a functional coloring comprising the following steps (a) to (c) in this order:
- step (b) applying a coloring to both main sides of the substrate provided in step (a), and
- step (c) applying a functional color to both main sides of the substrate provided with a color on both main sides in step (b) by dip coating, whereby a substrate provided with a color and a functional color on both main sides is obtained.
- the method according to the invention enables reproducible coloring of the substrate without impairing its functional coloring.
- the reason for this lies in the specific sequence of the process steps. Since the functional coloring is applied after the coloring has been applied, the disadvantages that occur with the manufacturing processes established in the prior art can be avoided.
- the substrate obtained using the method according to the invention is advantageous Provided on both sides with both the coloring and the functional coloring, which is desirable not least for aesthetic reasons.
- the substrate has a first main side and a second main side opposite the first main side.
- the first main side of the substrate corresponds to the back of the later spectacle lens, which faces the spectacle wearer, while the second main side of the substrate corresponds to the front of the later spectacle lens, which faces away from the spectacle wearer.
- the second main side of the substrate has a convex shape.
- the first main side of the substrate may have a concave or planar shape, as described in more detail below.
- the first main side of the substrate typically has a concave shape.
- a finished part is understood to mean a finished product that can be used immediately for a predetermined purpose, for example as a lens for an eyeglass lens.
- a finished part is already ready for its later use brought into a final geometric shape.
- the concave shape of the first main side of the substrate therefore does not require any surface processing. The same applies to the convex shape of the second main side of the substrate.
- the first main side of the substrate typically has a planar or concave shape.
- a half-part sometimes also referred to as a "blank”
- a half-part is therefore still in view of its later use not brought into a final geometric shape.
- the planar or concave shape of the first main side of the substrate accordingly requires surface processing in order to adapt the substrate to the later requirements, for example in relation to the desired optical effect, for example in relation to the desired refractive power, such as resulting from an optical prescription.
- part of the substrate material is removed from the first main side while forming or maintaining the concave shape.
- the second main side of the substrate already corresponds to the final optically effective one Area. So even with the half part, the convex shape of the second main side of the substrate does not require any surface processing.
- step (b) If the planar or concave shape of the first main side of the substrate is subjected to surface processing, as is the case with a half-part, this takes place before step (b).
- Surface processing is not further limited according to the present invention. It can be done, for example, by milling, grinding, polishing or a combination thereof. In principle, however, any other form of surface processing is conceivable.
- a coloring is applied to both main sides of the substrate provided in step (a).
- the sole purpose of the coloring is to give the substrate a specific color.
- dyes are used which - apart from their absorption properties - have no functional properties and therefore no reversible switching back and forth between a dark and dark color enable a light tint.
- non-functional dyes such as those used in the process according to the invention, are non-photochromic.
- Various classes of non-functional dyes are described in the prior art. These are often azo dyes, cyanine dyes, anthraquinone dyes or the like, as are often used in the conventional coloring of spectacle lenses. The skilled person routinely selects a suitable non-functional dye or a mixture of suitable non-functional dyes.
- the method according to the invention is not further restricted.
- the coloring is applied in step (b) by immersing the substrate in a dyeing tank which contains at least one non-functional dye dissolved or dispersed in a liquid medium.
- the substrate is completely colored.
- both main sides of the substrate are provided with the coloring.
- the coloring tank is not subject to any particular limitation as long as it can provide coloring to the substrate.
- the dyeing tank which can be part of a conventional dyeing system that can be used for a variety of applications, is filled with a liquid medium.
- the at least one non-functional dye is dissolved or dispersed in this.
- the liquid medium may be a water bath, but is not limited to this.
- the liquid medium is typically heated to a temperature in the range from 60 to 100 ° C, for example to a temperature in the range from 75 to 95 ° C, the adjustable heating temperature of the liquid medium depends not least on its boiling point. At elevated temperatures, the absorption of the non-functional dye through the surface of the substrate is promoted. Further details regarding the dyeing process in a dye tank are known to those skilled in the art.
- the extent of dye absorption can ultimately be controlled based on the duration of immersion. It applies that the extent of the dye absorption also the duration of immersion increases. As the extent of dye uptake increases, the transmission of the substrate provided with color on both main sides in step (b) decreases. The desired transmission of the substrate, also referred to as target transmission, can therefore be specifically adjusted in step (b), which enables reproducible coloring of the substrate.
- a functional coloring is applied to both main sides of the substrate provided with a coloring on both main sides in step (b).
- the result is a substrate provided with a coloring and a functional coloring on both main sides.
- the functional coloring serves to give the substrate a certain functional property. If the functional property is due to a reversible change in the absorption behavior caused by an external stimulus such as UV light, the functional coloring can be caused by at least one photochromic dye.
- photochromic dyes are described in the prior art. These are often chromenes, viologens, fulgides and fulgimides and, in particular, spiro compounds such as spirooxazines or spiropyrans, but are not limited to these. The skilled person routinely selects a suitable photochromic dye or a mixture of suitable photochromic dyes.
- the functional coloring is applied by dip coating, which can be done in a conventional dip coating system that can be used for a variety of applications.
- dip coating requires significantly less equipment.
- the substrate is completely provided with the functional coloring.
- both main sides of the substrate are provided with the functional coloring.
- the functional coloring is caused by at least one photochromic dye
- the substrate provided with coloring on both main sides is expediently immersed in a photoresist which contains the at least one photochromic dye.
- the photoresist forms a polymeric layer on the substrate. This is not influenced by the coloring underneath. So there is no impairment of the functional coloring due to the coloring.
- the method according to the invention can further include a step of applying one or more coating layers to at least one of the two main sides of the substrate obtained in step (c), which is provided with a coloring and a functional coloring on both main sides, in Also referred to as step (d) below. If provided, step (d) is carried out following steps (a) to (c), with both main sides of the substrate usually being coated.
- Typical coating layers include hard layers, which serve to protect against scratches, interference anti-reflective layers, which serve to reduce reflections, and easy-care layers, sometimes also referred to as “topcoat” 1 or “cleancoat”, which serve to repel water and dirt, without However, to be limited to this.
- a hard layer can be achieved, for example, by dip coating, whereby the same dip coating system as in step (c) can be used. For this purpose, this is done on both main sides
- the substrate provided with a coloring and a functional coloring is immersed in a hard lacquer. If a photoresist is used when applying the functional coloring in step (c), it may be necessary for excess residues of the photoresist to be removed from the edges of the substrate before tempering in step (d). Need to become.
- the substrate is provided with a coloring and a functional coloring on both main sides.
- the substrate which is obtainable with the method according to the invention and is provided with a coloring and a functional coloring on both sides, can be used in a variety of ways and can be used, for example, as a lens for a spectacle lens.
- the substrate is then edge-processed to fit into a glasses frame. Description of the figure:
- FIG 1 shows a schematic representation of the method according to the invention. Step (d), also shown in Figure 1, is optional.
- substrates were provided with a coloring and a functional coloring on both sides.
- Different non-functional dyes such as anthraquinone dyes or azo dyes were used for the coloring.
- functional dyeing however, the same photochromic dye was always used.
- the first main page of the half parts was each subjected to surface processing. This was done by grinding, whereby part of the substrate material was removed from the first main side to form a concave shape to achieve the desired optical effect.
- the surface-processed substrates were then immersed in a dyeing basin. This contained the respective non-functional dye for coloring in an aqueous solution. By immersing them in the dye tank, the substrates were colored on both sides. The duration of the immersion was chosen so that the target transmission was achieved.
- the dyeing process took place at a temperature in the range of 60 to 100°C.
- the substrates provided with the coloring on both sides were then immersed in a photoresist containing the photochromic dye for the functional coloring, whereby the substrates were also provided with the functional coloring on both sides.
- a hard layer was then applied to both main sides of the substrates, which were provided with the coloring and the functional coloring on both sides, which was done by dipping the substrates into a hard lacquer.
- An interference anti-reflection layer was then applied to this.
- the substrates obtained in this way had all the necessary properties and thus represented raw, round spectacle lenses that could ultimately be edge-processed to fit into a spectacle frame.
- the method according to the invention allows reproducible coloring of the substrate without impairing its functional coloring.
Landscapes
- Engineering & Computer Science (AREA)
- Health & Medical Sciences (AREA)
- Manufacturing & Machinery (AREA)
- Ophthalmology & Optometry (AREA)
- Mechanical Engineering (AREA)
- Surface Treatment Of Optical Elements (AREA)
- Application Of Or Painting With Fluid Materials (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE102022110731.0A DE102022110731B4 (de) | 2022-05-02 | 2022-05-02 | Verfahren zum Versehen eines Substrats mit einer Einfärbung und einer Funktionsfärbung |
| PCT/EP2023/060337 WO2023213556A1 (de) | 2022-05-02 | 2023-04-20 | Verfahren zum versehen eines substrats mit einer einfärbung und einer funktionsfärbung |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| EP4519073A1 true EP4519073A1 (de) | 2025-03-12 |
Family
ID=86328726
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP23721627.0A Pending EP4519073A1 (de) | 2022-05-02 | 2023-04-20 | Verfahren zum versehen eines substrats mit einer einfärbung und einer funktionsfärbung |
Country Status (4)
| Country | Link |
|---|---|
| US (1) | US20250296288A1 (de) |
| EP (1) | EP4519073A1 (de) |
| DE (1) | DE102022110731B4 (de) |
| WO (1) | WO2023213556A1 (de) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102024118767A1 (de) * | 2024-07-02 | 2026-01-08 | Rodenstock Gmbh | Optische Linse |
| DE102024118773A1 (de) * | 2024-07-02 | 2026-01-08 | Rodenstock Gmbh | Optische Linse |
Family Cites Families (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE10026717A1 (de) * | 2000-05-30 | 2001-12-13 | Rodenstock Optik G | Photochromer Kunststoffgegenstand mit permanent gesteigertem Kontrast |
| US6433043B1 (en) * | 2000-11-28 | 2002-08-13 | Transitions Optical, Inc. | Removable imbibition composition of photochromic compound and kinetic enhancing additive |
| US6562466B2 (en) | 2001-07-02 | 2003-05-13 | Essilor International Compagnie Generale D'optique | Process for transferring a coating onto a surface of a lens blank |
| DE10338893B4 (de) * | 2003-08-23 | 2007-07-05 | Essilor International (Compagnie Generale D'optique) | Verfahren zur Herstellung von Brillengläsern und anderen optischen Formkörpern aus Kunststoff |
| IT1393919B1 (it) * | 2009-04-16 | 2012-05-17 | Marinelli | Metodo per la produzione di elementi ottici fotocromatici ed elementi ottici fotocromatici |
| US11036065B2 (en) * | 2015-10-30 | 2021-06-15 | Transitions Optical, Ltd. | Method of making an optical article with an inkjet printing device |
| DE102017005473B3 (de) | 2017-06-08 | 2018-08-16 | Rodenstock Gmbh | Glashalter für Tauchlackbeschichtung |
| EP3812142A1 (de) | 2019-10-23 | 2021-04-28 | Carl Zeiss Vision International GmbH | Verfahren zur herstellung eines brillenglases sowie ein erzeugnis umfassend ein brillenglas |
-
2022
- 2022-05-02 DE DE102022110731.0A patent/DE102022110731B4/de active Active
-
2023
- 2023-04-20 WO PCT/EP2023/060337 patent/WO2023213556A1/de not_active Ceased
- 2023-04-20 US US18/861,628 patent/US20250296288A1/en active Pending
- 2023-04-20 EP EP23721627.0A patent/EP4519073A1/de active Pending
Also Published As
| Publication number | Publication date |
|---|---|
| DE102022110731A1 (de) | 2023-11-02 |
| US20250296288A1 (en) | 2025-09-25 |
| WO2023213556A1 (de) | 2023-11-09 |
| DE102022110731B4 (de) | 2023-12-07 |
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