SPECTACLE LENS AND METHOD FOR MANUFACTURING A SPECTACLE LENS

Description

TECHNICAL FIELD

[0001] Embodiments of the invention relate to a method for manufacturing a spectacle lens. In particular, various embodiments relate to techniques for forming a HOE-capable polymer layer disposed on a substrate of the spectacle lens and suitable for forming a holographic optical element. BACKGROUND

[0002] US 5,432,623 A discloses a method for producing a quality optical lens with an integral coating of a holographic recording material. The method comprises preparing a lens element and immersing the lens element in a solution of a liquid holographic recording material. The lens element is then removed from the solution, and any remaining soluble components of the coating are subsequently allowed to evaporate. Furthermore, another method for producing a quality optical lens is described, which comprises placing several drops of a solution of a liquid holographic recording material on a polished, non-stick surface, such as Teflon. The surface of the lens element to be coated is then brought into contact with this liquid, causing it to spread evenly between the surface of the lens element and the surface.The lens element can then be removed from the surface.

[0003] US 2004 / 108971 A1 describes a head-mounted device for transmitting an image to the eye, employing switchable holographic optical elements. Furthermore, eye-tracking functionality is disclosed. This can be achieved using an array of emitters and detectors on a screen arranged in front of a display. The emitters emit radiation. In another embodiment, a dynamic optical device can be an electrically switchable holographic composite material. This comprises a number of layers, each layer comprising a plurality of pre-recorded holographic elements acting as diffraction gratings.

[0004] US 2015 / 153484 A1 discloses an optical lens made of transparent plastic and having a coating comprising multiple layers. Furthermore, a hard-coated layer is formed adjacent to the lens element.

[0005] US Pat. No. 6,139,147 A describes a multifocal optical lens comprising a first optical element providing a first optical power and a second optical element providing a second optical power. The second optical element is a holographic optical element programmed to focus incident light.

[0006] JP 2007 286472 A describes a manufacturing process for a holographic optical element. It also mentions a spectacle lens with a holographic optical element.

[0007] JP H10 133554 A discloses a reflective holographic optical element and a manufacturing method for such a holographic optical element. It also mentions a spectacle lens with a holographic optical element.

[0008] Techniques for manufacturing optical components that form a holographic optical element (HOE) are known. HOEs typically refer to optical components in which holographic properties are used to achieve a specific beam path of light, such as focusing or converging, scattering, and / or reflection, etc. This allows specific optical functionalities to be implemented. The holographic properties, in turn, exploit the wave nature of light, particularly coherence and interference effects. Both the intensity and phase of the light are taken into account.

[0009] For example, US 2001 / 0055094 A1 discloses techniques in which an optical lens is formed from polymerizable material in a mold. However, such techniques have various limitations and disadvantages. For example, the polymerizable materials suitable for forming a HOE are typically comparatively soft and not very rigid or strong. This can lead, particularly in the case of spectacle lenses, to increased susceptibility to external stresses, such as a fall or exposure to abrasive media. This can limit the resilience of the spectacle lens. Furthermore, the optical functionalities that can be implemented by such a spectacle lens based on the holographic properties, such as refractive power, correction of astigmatism of the eye, chromatic correction, higher-order corrections, or corrections that vary with the viewing angle, etc.be restricted. SUMMARY

[0010] Therefore, there is a need for improved ophthalmic lenses and for improved processes for manufacturing such lenses. In particular, there is a need for techniques that address at least some of the aforementioned disadvantages. In particular, there is a need for comparatively robust and less defect-prone ophthalmic lenses that incorporate / can accommodate a HOE.

[0011] According to one aspect, the invention relates to a spectacle lens. The spectacle lens comprises a transparent substrate. The spectacle lens further comprises at least one HOE-capable polymer layer suitable for forming an HOE. The at least one HOE-capable polymer layer is arranged on the transparent substrate.

[0012] The substrate can be transparent to visible light; thus, transmission of visible light can occur at least partially through the substrate. The transparent substrate can, for example, absorb certain spectral regions of light more strongly than others; this allows selective transmission to be implemented. The substrate can provide the spectacle lens with a basic mechanical structure and achieve a certain mechanical resilience of the spectacle lens. The substrate can also implement optical functionalities of the spectacle lens. For example, the substrate can form an optical lens. This allows, for example, a specific refractive power of the spectacle lens to be achieved. This allows visual defects in a user's eye to be compensated for or corrected.

[0013] Special optical mineral glasses and polymers can be used as substrate materials. The transparent polymer substrate, for example, can be selected from the following group: polyallyl diglycol carbonate (ADC); polyurethanes (PUR); acrylate and allyl systems; polythiourethanes (PTU); episulfide / thiol systems; thermoplastics such as polycarbonate or polyamides. The center thickness of the substrate can, for example, be in the range of 1–3 mm and is preferably approximately 2 mm. In this way, the transparent substrate can provide a comparatively high level of robustness for the ophthalmic lens. Furthermore, it may be possible to implement specific optical functionalities. The thickness of the substrate can vary as a function of location.

[0014] The at least one HOE-capable polymer layer can be arranged on the substrate in a variety of ways. For example, the at least one HOE-capable polymer layer can be arranged directly adjacent to the substrate. However, it would also be possible for additional layers to be arranged between the at least one HOE-capable polymer layer and the substrate, e.g., a primer layer to improve the adhesion of the polymer to the substrate. Alternatively or additionally, it would also be possible for a fixing layer to be located between the HOE-capable polymer layer and the substrate to fix the HOE-capable polymer layer to the substrate.

[0015] By arranging the at least one HOE-capable polymer layer on the substrate, it may be possible for the spectacle lens as a whole to exhibit a high degree of robustness, despite the typically comparatively soft material of the at least one HOE-capable polymer layer. In particular, the spectacle lens can be designed to be comparatively break-resistant.

[0016] The HOE-capable polymer layer can, for example, comprise a matrix of a specific polymer (polymer matrix). This polymer matrix can impart a certain structure to the polymer layer.

[0017] The HOE-capable polymer layer can form the HOE in the HOE-capable polymer layer after suitable exposure and / or further processing steps. The at least one HOE-capable polymer layer can then comprise a HOE polymer. The HOE polymer can, for example, be embedded in the polymer matrix; in particular, the HOE polymer can be different from the specific polymer that forms the polymer matrix. Induced local density variations of chains of the HOE polymer typically cause a local variation in the refractive index of the HOE-capable polymer layer and thus form the HOE. A corresponding structure of the HOE polymer can, for example, be achieved by suitable exposure of a photoreactive component. In order for the at least one HOE-capable polymer layer to be suitable for forming the HOE, the at least one HOE-capable polymer layer can comprise the photoreactive component or several photoreactive components.The individual molecules of the photoreactive component can, for example, be embedded in the polymer matrix. The photoreactive component can comprise a polymer reactant. The polymer reactant can be converted into the aforementioned HOE polymer, which ultimately forms the HOE. The conversion can occur by linking and / or crosslinking shorter molecules of the polymer reactant. The conversion could also involve rearranging already linked and / or crosslinked molecules of the polymer reactant. For example, the polymer reactant can be a photopolymer or a photomonomer.

[0018] For example, the photoreactive component can comprise a dye; e.g., individual molecules of the dye can be coupled to individual molecules of the polymer reactant. It is also possible for the photoreactive component to comprise further components, such as initiators, etc. The dye and / or the initiator can cause the polymer reactant to be converted into the HOE polymer upon illumination with light of a predetermined wavelength. The individual molecules of the polymer reactant can - in a state in which the at least one HOE-capable polymer layer does not form the HOE - be unlinked or uncrosslinked, form comparatively short chains of molecules or networks, and / or form specially arranged chains or networks of molecules.Molecules of the polymer starting material can be cross-linked and / or rearranged by exposure to light in a suitable wavelength range, so that the HOE polymer has a different structure and / or distribution compared to the polymer starting material.

[0019] Through such polymerization, the refractive index of the at least one HOE-capable polymer layer can change locally compared to a value for the non-exposed polymer layer.

[0020] For example, the lens can further comprise a diffusion barrier layer. The diffusion barrier layer can be directly adjacent to the HOE-capable polymer layer. The diffusion layer can prevent the HOE polymer or the photoreactive component from diffusing over time.

[0021] In general, a wide variety of applications are possible for implementing optical functionalities using the HOE. For example, the optical functionality can be selected from the following group: a lens; a mirror; a wavelength-specific mirror; a prism; a transflective beam combiner; a converging lens; a diverging lens; a concave mirror; a convex mirror; a color filter; data glasses; and combinations of the above.

[0022] For example, comparatively complex optical corrections for compensating for visual defects of the eye can be implemented using the HOE. In this regard, it is possible, for example, for an optical functionality of the spectacle lens, which relates to compensating for visual defects of the eye, to be influenced both by the HOE and by a lens property of the substrate. The substrate and the HOE can thus interact to implement the optical functionality. A combined effect can be achieved. This allows particularly complex optical functionalities to be implemented.

[0023] For example, the HOE can be used to implement an image generation device. In this way, the HOE can, for example, enable the implementation of data glasses that generate an image, particularly of data. The data glasses can be used as a head-worn device (HWD). Data glasses are devices that are worn on the head like conventional eyeglasses and, on the one hand, allow viewing of the surroundings through the data glasses, but, on the other hand, also enable the viewing of reflected data. The term "data" is to be understood generally here and can refer to symbols, characters, numbers, images, videos, and the like. With other devices, only data viewing is possible, without the possibility of simultaneously viewing the surroundings.The data can be presented in a context-related manner in overlay with the environment (augmented) and can, for example, relate to data supplementing the environmental scene, navigation data, hint data, notifications, documentation, virtual input interfaces, etc.

[0024] Within the context of data glasses, the HOE can implement a wide variety of optical functionalities, e.g., particularly for light emitted by a light source arrangement of the data glasses; for example, it would be possible for the lens to have an optical functionality as a light-guiding element of an image-generating device. For this purpose, the HOE can be designed as a wavelength-specific mirror that modifies light of a predetermined wavelength range, e.g., "redirects" it toward an observation location or images it as a virtual intermediate image viewable by the user, while transmitting light of other wavelengths unchanged.In this way, the HOE can act as a transflective beam combiner, which, for example, redirects the light of a predetermined wavelength range coming from a light source arrangement of the data glasses toward a user's eye and transmits other wavelengths of ambient light beyond the predetermined wavelength range unchanged. In addition, the HOE can have optical functionalities with additional optical effects in conjunction with the data glasses. For example, the HOE can operate for a defined angular range and disregard other angular ranges, thus implementing a wavelength-specific reflector.

[0025] The lens of the data glasses can have multiple HOEs. A first HOE can be configured to direct light coming from a light source arrangement to another HOE. Another HOE can be configured to decouple the light coupled into the lens toward a user's eye, so that the user observes an image from the imager at a specific viewing angle.

[0026] As a further application, the HOE can implement identification and / or branding elements. For example, a lens serial number could be represented by the HOE in a relatively forgery-proof manner. Alternatively or additionally, a lens manufacturer could be represented by the HOE. Alternatively or additionally, a personal identification feature of the wearer or the glasses could be represented by the HOE in a way that is identifiable to the owner or the optician.

[0027] Using the techniques described above, it is therefore possible to integrate a comparatively soft material of the at least one HOE-capable polymer layer into the spectacle lens in such a way that essential physical properties of the spectacle lens, such as the optical function and the mechanical resistance, are not or not significantly impaired by the at least one HOE-capable polymer layer - e.g., compared to a reference implementation without an HOE-capable polymer layer. Typically, conventional spectacle lenses have a layer that is comparable to the substrate of the spectacle lens according to the currently discussed aspect. In particular, it may be possible for conventional spectacle lenses to have layers that have similar properties to the HOE-capable polymer layer.Therefore, it may be possible that such a HOE-capable polymer layer can be integrated into an existing layer system without impairing its optical function.

[0028] The ophthalmic lens further comprises a transparent hard layer arranged on the transparent substrate. The at least one HOE-capable polymer layer is arranged between the transparent substrate and the hard layer.

[0029] The hard layer can comprise a material that imparts comparatively high rigidity and strength to the hard layer—e.g., compared to the at least one HOE-capable polymer layer and the substrate. This can result in a particularly high degree of robustness of the spectacle lens. The hard layer can therefore improve the thermal and mechanical properties of the spectacle lens. For example, the hard layer can comprise an organic material. For example, the hard layer can comprise organic-inorganic hybrid materials, e.g., based on a polysiloxane.

[0030] The hard coating can be provided to improve the adhesion of an anti-reflective coating or a clean-coat layer to the substrate. Optionally, the spectacle lens could also include the anti-reflective coating. Alternatively or additionally, the spectacle lens could also include the clean-coat layer. Both layers can, for example, comprise inorganic materials. For example, the anti-reflective coating and the clean-coat layer can comprise a predominant proportion of inorganic materials.

[0031] For example, the anti-reflective layer and / or the clean coat layer can be arranged on a side of the substrate facing the front side of the spectacle lens. For example, the following layer sequence could be implemented: (back side): substrate - HOE-capable polymer layer - hard coating - anti-reflective layer - clean coat layer (front side).

[0032] Alternatively or additionally, it would also be possible for the anti-reflective layer and / or the clean-coat layer to be arranged on a side of the substrate facing the back of the lens. For example, the following layer sequence could be implemented: (back) clean-coat layer - anti-reflective layer - hard coating - substrate - HOE-capable polymer layer - hard coating - anti-reflective layer - clean-coat layer (front).

[0033] For example, the anti-reflective layer can comprise at least two materials from the following group in a stacked arrangement: SiO 2 , TiO 2 , ZrO 2 , Al 2 O 3 . In this way, for example, an interference layer stack of oxide materials can be formed. A layer thickness of the anti-reflective layer can, for example, be in the range of 200-700 nm, preferably 300-500 nm. The anti-reflective layer can be used to implement an anti-reflective coating on the spectacle lens as an optical functionality; a reflection value for light incident on the front side of the spectacle lens can be reduced; alternatively or additionally, a reflection value for light incident on the back side of the spectacle lens can be reduced. Light reflections can be reduced.

[0034] The clean coat layer can be provided to prevent dirt from adhering to the front or back of the lens. For example, the front can be convex and / or the back can be concave. The thickness of the clean coat layer can be in the range of 5-50 nm, preferably in the range of less than 10 nm. For example, the clean coat layer can comprise a material with hydrophobic and / or oleophobic properties.

[0035] In general, it is also possible for the spectacle lens to further comprise the anti-reflective layer arranged on the transparent substrate. The at least one HOE-capable polymer layer can be arranged between the transparent substrate and the anti-reflective layer. In particular, the anti-reflective layer can be applied directly to the HOE-capable polymer layer.

[0036] For example, the thickness of each of the at least one HOE-capable polymer layer can be in the range of 1 µm to 100 µm, preferably in the range of 10 µm to 100 µm. Such a layer thickness can allow the optical functionality of the HOE to be designed particularly flexibly. Complex optical functionalities can be implemented. This can also make it possible to make comparatively strong optical corrections. A layer thickness in the range of a few µm may be sufficient to implement optical functionalities.

[0037] It may be possible for an average refractive index of the at least one HOE-capable polymer layer to be substantially equal to a refractive index of the transparent substrate and / or the hard layer, e.g., without prejudice to a local variation in the refractive index due to the local linking of the polymer in the HOE-capable polymer layer. Essentially equal here can mean that a deviation in the refractive indices—e.g., taking into account variations in the layer thickness of the at least one HOE-capable polymer layer—causes no or no significant interference effects, such as interference rings, etc. In this regard, it may be possible for the HOE-capable polymer layer to comprise at least one oxide material, such as oxide nanoparticles TiO2 and / or an aromatic system and / or thiol components as additive(s); typically, the refractive index of the HOE-capable polymer layer can be specifically controlled via an appropriate concentration.

[0038] For example, the at least one HOE-capable polymer layer can be arranged on a front side of the transparent substrate. It would also be possible for the at least one HOE-capable polymer layer to be arranged on a back side of the transparent substrate.

[0039] For example, it would be possible for the front surface to be convex. Alternatively or additionally, it would be possible for the back surface to be concave. For example, it could be a substrate or spectacle lens that is concave on one side.

[0040] In general, the ophthalmic lens may comprise one or more HOE-capable polymer layers. For example, it would be possible for a first HOE-capable polymer layer to be disposed on the convex front side of the transparent substrate and a second HOE-capable polymer layer to be disposed on the concave back side of the transparent substrate. It is possible for the ophthalmic lens to comprise one or two adjacent diffusion barrier layers for each HOE-capable polymer layer.

[0041] The spectacle lens may further comprise the primer layer. The primer layer may, for example, comprise the polymer matrix and / or another polymer. It is possible for the primer layer not to comprise a photoreactive component, i.e., in contrast to the HOE-capable polymer layer, which may comprise a photoreactive component. It is also possible for the primer layer not to comprise the HOE polymer. The primer layer may therefore be unsuitable for forming the HOE. For example, the primer layer can be applied from a polymer dispersion.

[0042] The primer layer thickness can range from 0.7 to 1.0 µm. Typically, the material used for the primer layer is comparatively soft. Therefore, the primer layer can provide improved adhesion of the hard coating and the anti-reflective or clean coat layer to the substrate. Furthermore, the primer layer can serve as a load-absorbing base, allowing for better absorption of loads such as those encountered in the ball drop impact test according to FDA standards.

[0043] Typically, it is possible for the material of the primer layer to be similar to the material of the HOE-capable polymer layer and, in particular, to have similar mechanical and / or chemical properties. For example, the primer layer can also comprise the polymer matrix of the HOE-capable polymer layer. However, it would be possible for the primer layer to comprise another polymer which, however, can, for example, have similar physical and chemical properties to the polymer matrix or the HOE polymer of the HOE-capable polymer layer. Therefore, it may be possible for various advantageous effects, as explained above with regard to the primer layer, to be achieved by the HOE-capable polymer layer as an alternative to or in addition to the primer layer.

[0044] The substrate, the HOE-capable polymer layer, the hard layer, the anti-reflective layer, the clean coat layer, and the primer layer were explained above with regard to the spectacle lens. It is possible for the spectacle lens to comprise further or different layers. For example, further properties of the spectacle lens can be realized or improved with additional layers. For example, a layer to reduce water fogging can be provided. Such a layer can be hydrophilic. It would also be possible to provide a layer for polarization filtering of the incident light. It is also possible to provide a layer with photochromic properties. Within the scope of such aforementioned techniques, layers with layer thicknesses of up to 100 µm are typically used. The materials used for such layers can often be comparatively soft, e.g., comparable to the softness of the HOE-capable polymer layer.Typically, such layers can be arranged on the polymer substrate and, for example, directly adjacent to it. In particular, it is possible for such layers to be arranged between the substrate and the hard layer.

[0045] Aspects of a spectacle lens according to various embodiments have been illustrated above. Using appropriate techniques, it may be possible to integrate the HOE-capable polymer layer into a layer stack according to conventional spectacle lenses. The integration can be carried out in such a way that the function of the usual hard layer and anti-reflective layer is not impaired or not significantly impaired. In particular, it may be possible for the HOE-capable polymer layer to have mechanical properties comparable to those of a conventional primer layer. Therefore, it may be unnecessary to provide a primer layer in a spectacle lens according to various embodiments. This may be the case because a material of the HOE-capable polymer layer can have similar chemical and mechanical properties to a material of the conventional primer layer. Depending on the optical requirement profile - e.g.in terms of layer thickness and efficiency - the HOE-capable polymer layer can therefore take over the role of the conventional primer layer in whole or in part.

[0046] The following method for producing a spectacle lens is a variant not belonging to the invention. The spectacle lens comprises a HOE-capable polymer layer suitable for forming an HOE. The method comprises coating a transparent substrate of the spectacle lens with a precursor of the HOE-capable polymer layer. The method further comprises converting the precursor arranged on the transparent substrate to form the HOE-capable polymer layer.

[0047] It is therefore possible for the HOE-capable polymer layer to be generated in-situ on the substrate. The conversion of the precursor into the HOE-capable polymer layer can be achieved, for example, by heating, drying, and / or thermal curing. Physical conversion steps can therefore be used. The precursor can, for example, comprise the photoreactive component. For example, the precursor can comprise the polymer starting material. The precursor can comprise the photoreactive component in the form of a dispersion or solution. It is possible for neither the precursor nor the HOE-capable polymer layer to form the HOE; this may require a further, optional exposure step.

[0048] It is also possible for the conversion to involve a chemical reaction, i.e., to occur reactively. For example, the conversion can involve the formation of the polymer matrix from appropriate reactants, such as isocyanate and polyol. Additional reactants can be applied during the conversion process, such as light-sensitive additives or other additives. This can be achieved, in particular, with a homogeneous layer thickness.

[0049] For example, the precursor can comprise a polymeric carrier film containing the HOE-capable layer. Such techniques are known, for example, from the publication US 2010 / 0203241 A1 or under the trade name Bayfol ®< HX from Bayer MaterialScience AG, Leverkusen, Germany. Here, for example, a PUR-based polymer matrix for incorporating light-sensitive molecules can serve as the photoreactive component. The photoreactive component comprises the HOE-forming polymer, which rearranges upon exposure to light and thus enables the differences in refractive index in the range of 0.005 to 0.05 necessary for the formation of holograms. The precursor is not limited to a polymeric carrier film; in general, it is possible for the precursor to comprise other or additional substrate materials.

[0050] Coating the substrate with the precursor may involve, for example, wet coating techniques such as dip and spin coating, spraying, and / or flooding. Alternatively or additionally, the coating may involve printing processes such as inkjet and / or pad printing.

[0051] The method may further comprise, prior to coating, cleaning the substrate. For example, cleaning may be carried out with a suitable solvent. The method may further comprise, prior to coating, activating the substrate. For example, activation may comprise chemical activation with a suitable agent and / or physical activation, e.g., via a suitable plasma or corona treatment.

[0052] Such techniques for manufacturing the ophthalmic lens according to the aspect currently discussed could, for example, be repeatedly applied for several HOE-capable polymer layers.

[0053] The above illustrates techniques in which the HOE-capable polymer layer can be created in-situ on the lens substrate. However, it is also possible for the HOE-capable polymer layer to be created in a separate step and subsequently transferred to the substrate. This is explained in more detail below.

[0054] According to one aspect, the invention relates to a method for producing a spectacle lens according to claim 1. The spectacle lens comprises a HOE-capable polymer layer suitable for forming an HOE. The method comprises coating a carrier with a precursor of the HOE-capable polymer layer. The method further comprises converting the precursor arranged on the carrier to obtain the HOE-capable polymer layer. The method further comprises fixing the HOE-capable polymer layer to a transparent substrate of the spectacle lens.

[0055] With regard to the precursor, the conversion of the precursor, the substrate, and the HOE-capable polymer layer, features explained above with respect to further aspects can be applied. It is therefore possible for the coating of the carrier and the conversion of the precursor to be carried out separately and separately from the substrate. As part of the fixing of the HOE-capable polymer layer, the carrier can then be brought closer to the substrate; the approach can be carried out such that one side of the carrier, on which the HOE-capable polymer layer is located, faces the substrate. The HOE-capable polymer layer can then be fixed to the substrate, for example, by applying mechanical pressure. Using such techniques, it may be possible to produce the HOE-capable polymer layer without damaging the substrate. Furthermore, the carrier can be particularly suitable for participating in the steps required for the conversion.The carrier can be a film or a half shell.

[0056] For example, the HOE-capable polymer layer can be fixed by bonding and / or lamination. For example, after fixing the HOE-capable polymer layer, the process can further comprise removing the carrier from the HOE-capable polymer layer. For this purpose, the carrier can be prepared accordingly. The preparation can, for example, consist of deliberately adjusting the adhesion so that the bond to the carrier is weaker than to the substrate.

[0057] Alternatively, it would also be possible for the carrier to remain mounted on the substrate. For this purpose, the carrier can be designed to be transparent, at least to visible light. In such a case, it would be possible for the back of the carrier to be coated with an anti-reflective layer and / or a clean-coat layer and / or a hard layer and / or another functional layer before being applied to the substrate. The carrier can, for example, be made of the same material as the transparent substrate or of a different material.

[0058] Such techniques for manufacturing the ophthalmic lens according to the aspect currently discussed could, for example, be repeatedly applied for several HOE-capable polymer layers.

[0059] The process for producing the ophthalmic lens further comprises applying the hard coating, the anti-reflective coating and / or the clean coat layer to the HOE-capable polymer layer.

[0060] The hard layer can serve to improve the adhesion of the anti-reflective layer, the clean coat layer, and / or other layers to the substrate. Furthermore, the hard layer can improve the thermal and mechanical properties of the spectacle lens. The layer thickness of the hard layer can be, for example, 1-3 µm. Typically, the hard layer comprises organic-inorganic hybrid materials based on polysiloxane. It is possible, for example, for the application of the hard layer to comprise wet-chemical techniques. The wet-chemical techniques can, for example, comprise dip or spin coating. In addition, the application of the hard layer can comprise curing. The curing can, for example, comprise thermal curing by heating and / or UV exposure.

[0061] To apply the anti-reflective layer, an interference layer stack of alternating oxide materials such as SiO 2 , TiO 2 , ZrO 2 , or Al 2 O 3 can be applied in a suitable sequence and layer thickness using a physical vapor deposition (PVD) process. The layer thickness of the anti-reflective layer can be in the range of 300 nm - 500 nm, for example.

[0062] Optionally, using similar processes, such as PVD, the clean coat layer can be applied from appropriate fluorine-containing precursors as an optically inactive top layer of the ophthalmic lens. The clean coat layer can have a thickness of less than 10 nm.

[0063] The HOE-capable polymer layer can be arranged on a convex front side of the transparent substrate. It is also possible for the HOE-capable polymer layer to be arranged on a concave back side of the transparent substrate. In the context of so-called back-side processing, arranging the HOE-capable polymer layer on the spherical front side can offer advantages.

[0064] For example, the precursor and / or the HOE-capable polymer layer can comprise the photoreactive component. The process can further comprise applying a primer layer comprising a polymer matrix and / or another polymer to the substrate. For example, the primer layer based on a polymer dispersion can be applied wet-chemically. Typically, the primer layer thickness is in the range of 0.7–1.0 µm. Applying the primer layer can further increase the stability or robustness of the ophthalmic lens.

[0065] The methods for producing the spectacle lens further comprise the spatially resolved exposure of the HOE-capable polymer layer in order to form the HOE. The exposure can be carried out, for example, using writing techniques in which one or more laser beams are guided or scanned over the surface of the HOE-capable polymer layer; in this case, the laser beams can have comparatively small beam diameters. Alternatively or additionally, interference techniques can be used in which several comparatively large-area laser beams are used. The HOE polymer can be formed from the photoreactive component, e.g. the photomonomer or photopolymer, by exposure. The image to be exposed can then be fixed. In this process, light-sensitive components of the HOE-capable polymer layer can react and form a light-insensitive film. This applies, for example, to a photoreactive component remaining after exposure, e.g.in unexposed areas.

[0066] The spatially resolved exposure of the HOE-capable polymer layer takes place after the hard coating has been applied. The hard coating and, if applicable, the anti-reflective layer and / or the clean coat layer are transparent to the light used for exposure and cause no or no significant optical interference. Black backing can be used to reduce or prevent backside reflections.

[0067] In the case described above, where exposure occurs after the application of the hard coating and, if applicable, the anti-reflective coating and the clean coat layer, it may be possible to keep or store a prefabricated ophthalmic lens with all layers of a corresponding layer stack. Exposure to form the HOE can then take place. This can, in particular, enable simpler and faster production of the ophthalmic lens with an integrated HOE.

[0068] Above, a scenario was described in which the precursor is converted to obtain the HOE-capable polymer layer on a carrier, wherein the HOE-capable polymer layer is subsequently fixed to the transparent substrate of the spectacle lens. In such a scenario, it is particularly possible for the spatially resolved exposure of the HOE-capable polymer layer to take place before the HOE-capable polymer layer is fixed to the transparent substrate. In other words, the HOE can already be formed on the carrier, e.g. a film, and then the exposed HOE-capable polymer layer, which already forms the HOE, can be fixed to the substrate. The fixing can take place by lamination and / or gluing. In such a case, it may be desirable to take into account any compression / strain of the HOE due to the geometry of a surface of the substrate during the exposure process.Spatially resolved exposure involves obtaining geometric data that describe the geometry of the spectacle lens substrate. Spatially resolved exposure also involves determining control data based on the geometric data.

[0069] The control data describes the intensity and phase of the spatially resolved exposure. The spatially resolved exposure is performed using the control data. Using such techniques, exposure can be performed in a separate process on the substrate. Black backing can also be easier to implement.

[0070] Various techniques for manufacturing the ophthalmic lens comprising the HOE-capable polymer layer were explained above. In general, the techniques described above can be performed on a processed prescription lens or finished lens during prescription lens production. However, it would also be possible for the techniques described above to be performed on a semi-finished lens from which a prescription lens is only produced in a later step. In the latter case, it can be advantageous to protect the HOE-capable polymer layer with the hard coating from damage during subsequent prescription lens production. In such a case, processing during prescription lens production should take place on the side of the ophthalmic lens that is not coated with the HOE-capable polymer layer.

[0071] The features set forth above and features described below may be used not only in the corresponding explicitly set forth combinations, but also in further combinations or in isolation, without departing from the scope of the present invention. SHORT DESCRIPTION OF THE CHARACTERS

[0072] The above-described properties, features and advantages of this invention, as well as the manner in which they are achieved, will become clearer and more clearly understood in connection with the following description of the embodiments, which are explained in more detail in connection with the drawings. FIG. 1 is a schematic exploded view of a spectacle lens with different layers. FIG. 2 is a flow diagram of a method for producing a spectacle lens in a variant not belonging to the invention, wherein in the method a HOE-capable polymer layer, which is suitable for forming an HOE, is produced on a separate carrier. FIG. 3 is a flow diagram of a method for producing a spectacle lens in a variant not belonging to the invention, wherein in the method the HOE-capable polymer layer, which is suitable for forming the HOE, is produced in-situ on a substrate of the spectacle lens. FIGs. 4 - 6 illustrate the procedural steps of the FIG. 2 using schematic drawings of various production stages of the spectacle lens. FIGs. 7 - 10 illustrate procedural steps of the procedures according to FIGs. 2 und 3 in a variant not belonging to the invention, based on schematic drawings of various production stages of the spectacle lens. FIGs. 11 - 14 illustrate procedural steps of the procedures according to FIGs. 2 und 3 in a variant not belonging to the invention, based on schematic drawings of various manufacturing stages of the spectacle lens. FIG. 15 is a schematic exploded view of a spectacle lens with different layers. FIG. 16 is a schematic exploded view of a spectacle lens with different layers. FIG. 17 is a schematic side view of data glasses with a HOE. FIG. 18 is a schematic side view of data glasses with a HOE. DETAILED DESCRIPTION OF EMBODIMENTS

[0073] The present invention will now be explained in more detail using preferred embodiments with reference to the drawings. In the figures, identical reference numerals designate identical or similar elements. The figures are schematic representations of various embodiments of the invention. Elements depicted in the figures are not necessarily drawn to scale. Rather, the various elements depicted in the figures are depicted in such a way that their function and purpose will be understood by those skilled in the art.

[0074] Techniques related to providing a HOE-capable material in an ophthalmic lens are explained below.

[0075] In FIG. 1 A spectacle lens 100 according to various embodiments is shown in an exploded schematic drawing. The spectacle lens can be used, for example, in spectacles, such as data glasses (in FIG. 1 (not shown). The spectacle lens 100 comprises a substrate 101. A center thickness 101a of the substrate 101 is typically approximately 1-3 mm. The substrate is transparent to light in the visible wavelength range.

[0076] Adjacent to the substrate 101 is an HOE-capable polymer layer 102. The HOE-capable polymer layer 102 is suitable for forming the HOE. The HOE-capable polymer layer 102 comprises, for example, an HOE polymer or a photoreactive component comprising a polymer starting material of the HOE polymer. The HOE polymer can be formed by local polymerization and / or diffusion processes of the polymer starting material, which in turn can lead to a local variation of the refractive index. This allows an optical functionality of the spectacle lens 100 to be implemented. The HOE polymer or the photoreactive component can, for example, be embedded in a PUR-based polymer matrix. For example, one or two diffusion barrier layers could also be provided adjacent to the polymer layer 102 (in FIG. 1 not shown).

[0077] In FIG. 1 Furthermore, a layer thickness 102a of the HOE-capable polymer layer 102 is illustrated. The layer thickness 102a of the HOE-capable polymer layer is in a range from 1 µm to 100 µm, preferably in a range from 50 µm to 100 µm. Typically, the greater the layer thickness 102a of the HOE-capable polymer layer 102, the greater the influence of the HOE on the optical properties of the spectacle lens 100. Using larger layer thicknesses 102a, more complex optical functionalities can be implemented, ie, for example, a beam path of the light can be altered more significantly by the HOE.

[0078] The lens 100 of the FIG. 1 comprises a layer package that further comprises a hard layer 103-1 and an anti-reflective layer 103-2. A layer thickness 103-1a of the hard layer 103-1 lies in a range from 1 µm to 3 µm. A layer thickness 103-2a of the anti-reflective layer 103-2 lies in a range from approximately 300 to 500 nm. For example, the anti-reflective layer 103-2 has an interference layer stack made of oxide materials such as SiO 2 , TiO 2 , ZrO 2 and Al 2 O 3 in a suitable sequence and layer thickness.

[0079] Alternatively or additionally, an anti-reflective layer could be provided on a back side 100b of the spectacle lens 100.

[0080] Optionally, the spectacle lens 100 could, for example, comprise a clean coat layer (in FIG. 1 (not shown). The clean coat layer can, for example, be adjacent to the anti-reflective layer 103-2 and form a closure of the spectacle lens 100 on its front side 100a. The clean coat layer can, for example, have a layer thickness in the range of 5 nm - 50 nm.

[0081] In FIG. 1 A scenario is shown in which the HOE-capable polymer layer 102 is arranged on a convex front side 181 of the substrate 101, which faces the front side 100a of the spectacle lens 100. However, it would also be possible for the HOE-capable polymer layer 102 to be arranged on a concave back side 182 of the substrate 101, which faces the back side 100b of the spectacle lens 100.

[0082] In the FIG. 1 A scenario is shown in which the spectacle lens 100 comprises a single HOE-capable polymer layer 102. However, it would also be possible for the spectacle lens 100 to comprise more than one HOE-capable polymer layer 102. For example, the spectacle lens 100 could comprise a first HOE-capable polymer layer 102 on the convex front side 181 of the transparent substrate 101 and a second HOE-capable polymer layer on the concave back side 182 of the transparent substrate 101 (in FIG. 1 not shown).

[0083] By combining multiple HOE-capable polymer layers 102, which form, for example, different HOEs, special optical functionalities can also be achieved through a coherent or incoherent interaction of the different HOEs. This can be desirable, for example, in connection with the implementation of data glasses. Examples of this would be arrangements based on the actuator-compensator principle, see German patent application with application number 102014209792.4. Another example of the arrangement would be a multi-layer system comprising multiple HOE-capable polymer layers forming different HOEs, which is used for so-called angle multiplexing. In this case, the optical functionality, e.g., focusing, of an individual HOE is limited to a narrow viewing angle range of the wearer, while the remaining viewing angle ranges are unaffected by this HOE.In such a scenario, each layer of the multilayer system can contain an additional HOE that is optically functional for a different viewing angle range. The HOEs operate independently of each other, so each represents an independent optical function for a defined viewing angle range. Together, they operate optically for the entire viewing angle range.

[0084] In the FIG. 2 A flowchart of a method for manufacturing a spectacle lens 100 according to various embodiments is shown. The HOE-capable polymer layer 102 is not formed in-situ on the substrate 101, but separately on a separate carrier.

[0085] First, in step S1, the carrier is coated with a precursor of the HOE-capable polymer layer 102. The precursor of the HOE-capable polymer layer 102 can be, for example, liquid or solid; the precursor can be provided, for example, in film form. The precursor of the HOE-capable polymer layer 102 may not yet be suitable, or only to a limited extent, for forming the HOE. For example, the precursor can comprise a special formulation of the polymers suitable for forming the polymer matrix; it would also be possible for the precursor to comprise reactants of the polymers suitable for forming the polymer matrix, depending on whether or not a reactive conversion takes place in step S2. The precursor can, for example, comprise further additives, such as a catalyst, a flow aid, etc., which are required to form the polymer matrix. The precursor can, for example, contain photoreactive components, such as monomers, initiators, and / or dyes, etc.may include.

[0086] In step S2, the precursor is converted to form the HOE-capable polymer layer 102. In step S2, for example, the precursor can be thermally cured to form a stable film as the HOE-capable polymer layer 102; for example, the formulation can be converted into a solid film by evaporating the solvent, e.g., by forming the polymer matrix. Alternatively or additionally, reactive process steps involving a chemical reaction can also be carried out in step S2. For example, in step S2, the polymer matrix can be formed by a suitable reaction of individual molecules. For example, further additives and / or light-sensitive additives can be added to the precursor in step S2.

[0087] In step S3, the HOE-capable polymer layer 102 is fixed to the substrate 101. This is typically done by gluing and / or laminating the HOE-capable polymer layer 102 to the substrate. It would be possible for the carrier to subsequently be removed from the spectacle lens 100. However, it is also possible for the carrier to remain on the HOE-capable polymer layer 102.

[0088] In step S4, the HOE-capable polymer layer 102 is exposed to light to form the HOE. Step S4 is an optional step; however, step S4 should be performed if the HOE is actually to be formed. In step S4, the polymer reactant is converted into the HOE polymer; this involves a reactive conversion of the photoreactive component, e.g., a photomonomer or a photopolymer, through polymerization and / or diffusion. This process results in a spatially well-defined variation of the refractive index in the polymer layer, allowing optical features in the form of the HOE to be implemented.

[0089] In FIG. 3 A flowchart of another method for producing a spectacle lens 100 according to various embodiments is shown. The HOE-capable polymer layer 102 is formed in-situ on the substrate 101. First, the substrate 101 is coated with the precursor in step T1.

[0090] In step T2, the precursor is converted to form the HOE-capable polymer layer 102. Step T2 can be carried out in accordance with step S1 of the FIG. 2 be performed.

[0091] In step T3, the HOE-capable polymer layer 102 is exposed to light to form the HOE. Step T3 is an optional step; step T3 must be performed if the HOE is actually to be formed. Step T3 can be performed according to step S4 of the FIG. 2 be executed.

[0092] Both with regard to step S3 of the FIG. 2 , as well as with regard to step T1 of the FIG. 3 It may be desirable to pretreat the corresponding surface 181, 182 of the substrate 101 before applying the HOE-capable polymer layer 102 or the precursor of the HOE-capable polymer layer 102. For example, the corresponding surface 181, 182 of the substrate 101 may be cleaned. Alternatively or additionally, the corresponding surface 181, 182 of the substrate 101 may be activated.

[0093] FIGs. 4 - 6 show schematically different manufacturing stages or manufacturing pieces of the spectacle lens 100 according to the method according to FIG. 2 . In FIG. 4 - a state A - the HOE-capable polymer layer 102 is located on the carrier 105. For example, the carrier 105 can comprise a film or a half-shell. The half-shell can be concave or convex, for example. The carrier 105 can be shaped complementarily to the front side 181 of the substrate 101. Adjacent to the HOE-capable polymer layer 102, an adhesive / laminate coating 106 is also arranged on the carrier 105. Alternatively or in addition to the adhesive / laminate coating 106, solvent bonding techniques can also be used.

[0094] In FIG. 5 A state B is shown in which the carrier 105, the HOE-capable polymer layer 102, and the adhesive / laminate coating 106 are brought into contact with the substrate 101. In particular, the adhesive / laminate coating 106 is in contact with the front side 181 of the substrate 101. Alternatively or additionally, it would also be possible to attach the HOE-capable polymer layer 102 to the back side 182 of the substrate 101.

[0095] In FIG. 6 a state C is shown in which the carrier 105 is detached from the HOE-capable polymer layer 102 and is removed therefrom (in FIG. 6 illustrated by the vertical arrow). Alternatively, it would also be possible for the carrier 105 to remain on the HOE-capable polymer layer 102. In the latter case, it may be possible, for example, for the hard layer and / or the anti-reflective layer (both in FIG. 6 not shown) on the outer surface of the carrier 105.

[0096] Thus, state C in the manufacturing process of the spectacle lens 100 is reached, in which the HOE-capable polymer layer 102 is arranged on the substrate 101. Subsequently, the coating with the hard layer 103-1 and / or the anti-reflective layer 103-2 and / or the clean coat layer can take place (in FIGs. 4 - 6 not shown). In general, it is also possible that the hard layer (in FIGs. 4 - 6 not shown) is already applied / laminated with the HOE-capable polymer layer 102

[0097] In the FIGs. 7 - 10 (which are not part of the invention), as well as the FIGs. 11 - 14 (which is not

[0098] various scenarios for exposing the HOE-capable polymer layer 102 to form the HOE are shown. First, FIG. 7 a state A is shown in which the HOE-capable polymer layer 102 is arranged on the substrate 101. For example, an adhesive / laminate layer (in FIG. 7 not shown) fix the HOE-capable polymer layer 102 adjacent to the front side 181 of the substrate 101. The HOE-capable polymer layer 102 is suitable for forming the HOE; for this purpose, the HOE-capable polymer layer 102 comprises a suitable photoreactive component, which comprises, for example, the photomonomer. A reaction of this photoreactive component of the polymer layer has in FIG. 7 has not yet taken place. The HOE-capable polymer layer 102 comprises the polymer matrix.

[0099] In FIG. 8 State B is shown during the exposure of the HOE-capable polymer layer 102. The exposure is spatially resolved and phase-coherent with well-defined phase and intensity (in FIG. 8 represented by the two filled arrows). This forms the HOE 900 (cf. FIG. 9 ). In the FIG. 9 A state C is shown in which the HOE 900 has an identification or branding function. Therefore, it is sufficient for the HOE 900 to extend only over a portion of the entire surface of the HOE-capable polymer layer 102.

[0100] However, it would also be possible for the exposure to occur in such a way that the HOE 900 changes the optical functionalities of the spectacle lens 100 with regard to visual defects of the eye of the spectacle wearer. Particularly in such a case, it may be desirable for the HOE 900 to extend substantially over the entire surface of the HOE-capable polymer layer 102 (in FIG. 9 not shown). In this way, it may be possible to implement a corresponding optical functionality homogeneously in the area of the spectacle lens 101.

[0101] In state D of the FIG. 10 The HOE-capable polymer layer 102, which now forms the HOE 900, is coated with the hard layer 103-1. Optionally, a coating with the anti-reflective layer 103-2 and / or the clean coat layer could be applied (in FIG. 10 not shown). In the FIGs. 11 - 14 Inventive techniques relating to exposing the HOE-capable polymer layer 102 to form the HOE 900 are illustrated. In these techniques, the HOE-capable polymer layer 102 is exposed after the hard layer 103-1 has been applied.

[0102] In state A of the FIG. 11 the HOE-capable polymer layer 102 is formed on the substrate 101. In FIG. 12 A state is shown in which the hard layer 103-1 is arranged on the substrate 101, wherein the HOE-capable polymer layer 102 is located between the hard layer 103-1 and the substrate 101. The HOE-capable polymer layer 102 is suitable for forming a HOE 900. The HOE 900 is in the state of FIG. 12 but not yet trained.

[0103] In FIG. 13 A state C is shown during the exposure of the HOE-capable polymer layer 102. The exposure takes place through the hard layer 103-1, wherein the hard layer 103-1 is transparent to a wavelength of the light used for the exposure. It would also be optionally possible that in state C the FIG. 13 an anti-reflective layer is also arranged on the hard layer 103-1 (in FIG. 13 (not shown). Exposure could then also be performed through the anti-reflective layer. This could result in particularly high exposure efficiency, as reflection losses could potentially be reduced.

[0104] In state D of the FIG. 14 The HOE 900 is formed. Fixing or bleaching can then be performed to deactivate areas not exposed during exposure. This can prevent subsequent alteration, weakening, or destruction of the HOE 900. This is often referred to as fixing the HOE 900.

[0105] Techniques according to FIGs. 11 - 14 have the advantage that the finished spectacle lens 100, e.g. in state B acc. FIG. 12 , and the exposure to form the HOE 900 only takes place at a later time. This can make it possible to produce the finished ophthalmic lens 100 with the HOE 900 formed particularly quickly.

[0106] In FIG. 15 A spectacle lens 100 is illustrated in a schematic exploded view. The spectacle lens 100 in FIG. 15 has two hard layers 103-1 and two anti-reflective layers 103-2. A primer layer 105 is arranged on the back side 182 of the substrate 101. The primer layer 105 is optional. The primer layer 105 can be used to reinforce the spectacle lens 100. Furthermore, improved adhesion of the hard layer 103-1 arranged on the back and the anti-reflective layer 103-2 to the substrate 101 can be achieved; this is comparable to the effect that can be achieved with the polymer layer 102 with respect to the hard layer 103-1 and the anti-reflective layer 103-2 arranged on the front.

[0107] It would be in the scenario of FIG. 15 For example, it is also possible that - in addition to the primer layer 102 - a further primer layer is arranged on the front side 181 of the substrate 101 (in FIG. 15 not shown). For example, the primer layer(s) could be applied using dip coating techniques.

[0108] Referring to FIG. 16 : Instead of the primer layer 105, another HOE-capable polymer layer 112 could be provided. In the scenario of FIG. 16 The HOEs 900 work together to implement optical functionality.

[0109] Techniques for providing an HOE-capable polymer layer 102, which is suitable for forming an HOE 900, in a spectacle lens 100 were illustrated above. Such techniques have various effects and advantages. For example, it is possible to integrate the HOE-capable polymer layer 102, which is suitable for forming the HOE 900, into the spectacle lens 100 while maintaining the layer structure of a conventional spectacle lens 100. In particular, it is possible for a fracture-stabilizing effect of the primer layer 105 to be achieved by the HOE-capable polymer layer 102. Therefore, it may be unnecessary to provide the primer layer 105. Certain loads, which can occur, for example, during the ball drop impact test according to FDA standards, can be better withstood as a result. Typically, the HOE polymer orThe polymer starting material or polymer matrix used in the HOE-capable polymer layer 102 can be similar to a polymer used in the primer layer 105. Therefore, it may be possible for a corresponding polymer chemistry, such as that known, for example, in relation to the primer layer 105, to also be used for the treatment of the HOE-capable polymer layer 102. In particular, good adhesion of the polymer of the HOE-capable polymer layer 102 to the substrate 101 can be achieved. For this purpose, the substrate 101 can be cleaned and / or activated, for example. Furthermore, good adhesion of the hard layer 103-1 to the HOE-capable polymer layer 102 can be ensured. This can ensure overall good resistance and durability of the spectacle lens 101. Furthermore, according to the techniques described above, it is possible to equip semi-finished lenses orFinished lenses, which already comprise the hard layer 103-1 and optionally the anti-reflective layer 103-2 and / or the clean coat layer, with the HOE-capable polymer layer 102. Exposure of the HOE-capable polymer layer 102 to form the HOE 900 can be carried out on an as-needed and individual basis, e.g., to provide customer data and / or customized optical corrections. Using the techniques described above, it is also possible for the HOE 900 to be formed over the entire surface of the spectacle lens 100. In this case, an optical functionality implemented by the HOE 900 can be comparatively unrestricted. In particular, it may be possible to implement more complex optical functionalities that go beyond a pure identification / branding function, for example. Using the techniques described above, it is also possible to integrate more than one HOE-capable polymer layer 102 into the spectacle lens 100.In particular, it may be possible to arrange multiple polymer layers 102, 112 on different sides 181, 182 of the substrate 101. This allows complex optical functionalities to be achieved through the various HOEs 900 of the different polymer layers 102, 112.

[0110] In FIGs. 17 and 18 Aspects of the HOE 900 used in conjunction with data glasses 1700 are illustrated. The HOE 900 reflects light emitted by a light source arrangement 1750 of the data glasses 1700. The HOE 900 implements, for example, the optical functionality of a wavelength-specific mirror; alternatively or additionally, it would also be possible for the HOE 900 to implement the optical functionality of an angle-specific reflector and / or a transflective beam combiner. In this respect, the HOE 900 thus has imaging functionality.

[0111] Although in FIGs. 17 and 18While only a single HOE 900 is shown, the various optical functionalities implemented in connection with the data glasses 1700 by using holography techniques could also be implemented by two or more HOEs 900 that interact optically.

[0112] For reasons of clarity, the FIGs. 17 and 18 further illustrates only the substrate 101 and the HOE 900; however, the spectacle lens 100 may have an arrangement and a number of elements as discussed above.

[0113] In detail, the data glasses 1700 comprise a temple 1710. The temple 1710 has a housing in which the light source arrangement 1750 is arranged. In general, the light source arrangement 1750 can be designed in a variety of ways and can comprise different elements; for example, the light source arrangement 1750 could comprise fewer or more elements than in FIGs. 17 and 18 In the example of FIGs. 17 and 18The light source arrangement 1750 comprises a display device 1751 such as a light-emitting diode (LED) display, a display using organic LED (OLED) technology, or a liquid crystal (LCD) display. For example, the display device could comprise an LCD on silicon (LCOS) display; this could, for example, be used in particular in conjunction with a pole splitter and LED lighting arranged in the beam path behind the display device and in the direction of the spectacle lens 100. A laser light source could also be used as the display device 1751, for example in combination with a scanning device such as a movable mirror to scan the light beam across the retina of a user's eye.

[0114] The light source arrangement 1750 in the example of FIGs. 17 and 18further comprises a filter element 1752 that filters light according to wavelength. For example, the filter element 1752 can be a bandpass filter element that selectively transmits light in a specific wavelength band. In particular, the filter element 1752 is optional.

[0115] The light source arrangement 1750 further comprises an optical device 1753. The optical device 1753 is configured to direct light toward the HOE 900 located in the spectacle lens 100. For this purpose, the optical device 1753 could, for example, comprise one or more lenses. Alternatively or additionally, the optical device 1753 could also comprise one or more mirrors, for example, one or more movable mirrors.

[0116] In this way, it can be achieved that the light source arrangement 1750 is configured to emit light in the direction of the spectacle lens 100, in particular the HOE 900.

[0117] The HOE-capable polymer layer 102 or the HOE 900 is then configured to project the emitted light toward an eye of a wearer of the data glasses 1700. In the scenario of FIG. 17 For this purpose, the HOE 900 is arranged near the front side 100a of the spectacle lens 100; in the scenario of FIG. 18 The HOE 900 is arranged near the back 100b of the spectacle lens 100. In this scenario, the FIG. 17 the light source arrangement 1750 and the spectacle lens 100 are arranged relative to one another such that the beam path of the light from the light source arrangement 1750 to the HOE 900 runs within the substrate 101 of the spectacle lens 100; internal reflection at the surfaces 100a, 100b of the spectacle lens 100 can be used for beam guidance (in FIG. 17 indicated by the dashed line). In the scenario of FIG. 18the light source arrangement 1750 and the spectacle lens 100 are arranged relative to one another such that the beam path of the light from the light source arrangement 1750 to the HOE 900 also runs outside the substrate 101 of the spectacle lens 100.

[0118] Of course, the features of the previously described embodiments and aspects of the invention can be combined with one another. In particular, the features can be used not only in the described combinations, but also in other combinations or on their own, without departing from the invention defined in the claims.

[0119] The term "lens" is used above for simplicity and is not intended to be restrictive with regard to the material. In particular, the lens can also be made of one or more plastics.

Claims

1. Method for producing a spectacle lens (100) comprising an HOE-capable polymer layer (102), wherein the HOE-capable polymer layer (102) is suitable for forming a holographic optical element (900), wherein the method comprises: - coating a carrier (105) with a precursor of the HOE-capable polymer layer (102), - converting the precursor that is arranged on the carrier (105), to obtain the HOE-capable polymer layer (102), - spatially resolved exposure of the HOE-capable polymer layer (102) to form the holographic optical element (900), wherein the spatially resolved exposure comprises: - obtaining geometric data describing a geometry of the substrate (101) of the spectacle lens (100), - depending on the geometric data, determining control data describing an intensity and a phase of the spatially resolved exposure, - after the spatially resolved exposure of the HOE-capable polymer layer: fixing the HOE-capable polymer layer (102) on a transparent substrate (101) of the spectacle lens (100).

2. Method according to Claim 1, wherein the fixing of the HOE-capable polymer layer (102) is effected by adhesive bonding and / or laminating.

3. Method according to Claim 2, wherein the method after fixing of the HOE-capable polymer layer (102) on the transparent substrate (101) further comprises: - removing the carrier (105) from the HOE-capable polymer layer (102).

4. Method according to any of the preceding claims, wherein the method further comprises: - applying at least one of a hard layer (103-1), an antireflective layer (103-2) and a clean-coat layer to the HOE-capable polymer layer (102).

5. Method according to Claim 4, wherein the spatially resolved exposure of the HOE-capable polymer layer (102) is effected after application of the at least one of the hard layer (103-1), the antireflective layer (103-2) and the clean-coat layer.

6. Method according to any of the preceding claims, wherein the precursor and / or the HOE-capable polymer layer (102) comprise a photoreactive component and / or an HOE polymer and / or a polymer matrix, wherein the method optionally further comprises: - applying a primer layer (105) comprising the polymer matrix and / or a further polymer to the substrate (101).