SPECTACLE LENS AND METHOD FOR PRODUCING A SPECTACLE LENS

Abstract

A spectacle lens has a transparent substrate and at least one HOE-capable polymer layer arranged on the transparent substrate. The at least one HOE-capable polymer layer is suitable for forming a holographic optical element. Related methods and apparatus are described.

Claims

1. An optical lens, comprising: a transparent substrate, and at least one HOE-capable polymer layer on the transparent substrate, wherein the at least one HOE-capable polymer layer forms a holographic optical element.

2. The optical lens of claim 1, wherein the holographic optical element is formed by a spatially resolved exposure of the HOE-capable polymer layer, wherein the spatially resolved exposure is based on control data that comprises an intensity and a phase of the spatially resolved exposure, and wherein the control data is determined depending on a geometry of the transparent substrate.

3. The optical lens of claim 1, further comprising: a transparent hard layer on the transparent substrate, wherein the at least one HOE-capable polymer layer is between the transparent substrate and the transparent hard layer.

4. The optical lens of claim 3, wherein the transparent hard layer comprises a polysiloxane-based organic/inorganic hybrid material.

5. The optical lens of claim 3, wherein a layer thickness of the transparent hard layer is in a range of 1 m to 3 m.

6. The optical lens of claim 1, wherein a layer thickness of each of the at least one HOE-capable polymer layer is in a range of 1 m-100 m.

7. The optical lens of claim 1, wherein a first HOE-capable polymer layer of the at least one HOE-capable polymer layer is on a first side of the transparent substrate, and wherein a second HOE-capable polymer layer of the at least one HOE-capable polymer layer is on a second side of the transparent substrate.

8. The optical lens of claim 1, wherein the HOE-capable polymer layer comprises an HOE polymer in a polymer matrix, and wherein the optical lens further comprises a primer layer that comprises a further polymer in the polymer matrix.

9. Spectacles, comprising: a spectacle lens comprising the optical lens of claim 1; and a light source assembly configured to emit light in a direction of the optical lens, wherein the HOE-capable polymer layer is configured to reflect the light emitted by the light source assembly to an eye of a wearer of the spectacles.

10. The spectacles of claim 9, wherein the holographic optical element implements an optical functionality selected from a group comprising a wavelength-specific mirror, a transflective beam combiner, and an angle-specific reflector.

11. A method for producing an optical lens comprising an HOE-capable polymer layer, wherein the HOE-capable polymer layer is configured to form a holographic optical element, wherein the method comprises: coating of a transparent substrate of the optical lens with a precursor of the HOE-capable polymer layer; converting the precursor that is on the transparent substrate, to obtain the HOE-capable polymer layer, and performing a spatially resolved exposure of the HOE-capable polymer layer to form the holographic optical element, wherein the performing of the spatially resolved exposure comprises: obtaining geometric data comprising a geometry of the transparent substrate of the optical lens; and based on the geometric data, determining control data comprising an intensity and a phase of the spatially resolved exposure, wherein the spatially resolved exposure is performed based on the control data.

12. A method for producing an optical lens comprising an HOE-capable polymer layer, wherein the HOE-capable polymer layer is configured to form a holographic optical element, wherein the method comprises: coating of a carrier with a precursor of the HOE-capable polymer layer; converting the precursor that is on the carrier, to obtain the HOE-capable polymer layer; performing a fixation of the HOE-capable polymer layer on a transparent substrate of the optical lens; and performing a spatially resolved exposure of the HOE-capable polymer layer to form the holographic optical element, wherein the performing of the spatially resolved exposure comprises: obtaining geometric data comprising a geometry of the transparent substrate of the optical lens; and based on the geometric data, determining control data comprising an intensity and a phase of the spatially resolved exposure, wherein the spatially resolved exposure is performed based on the control data.

13. The method of claim 12, wherein the fixation of the HOE-capable polymer layer is performed by gluing and/or laminating.

14. The method of claim 12, wherein the method, after the fixation of the HOE-capable polymer layer on the transparent substrate, further comprises: removing the carrier from the HOE-capable polymer layer.

15. The method of claim 11, wherein the method further comprises: applying a hard layer to the HOE-capable polymer layer.

16. The method of claim 15, wherein the spatially resolved exposure of the HOE-capable polymer layer takes place after applying the hard layer and through the hard layer.

17. The method of claim 15, wherein said applying of the hard layer comprises wet chemical techniques.

18. The method of claim 15, wherein said applying of the hard layer comprises curing.

19. The method of claim 11, wherein the method further comprises: applying at least one of an antireflective layer or a clean coat layer to the HOE-capable polymer layer.

20. The method of claim 11, wherein the precursor and/or the HOE-capable polymer layer comprise a photoreactive component and/or an HOE polymer and/or a polymer matrix, and wherein the method further comprises: applying a primer layer comprising the polymer matrix and/or a further polymer to the transparent substrate.

Description

BRIEF DESCRIPTION OF THE FIGURES

[0067] The above-described properties, features, and advantages of this invention and the manner in which these are achieved become clearer and easier to understand in connection with the following description of the examples, which are described in further detail with reference to the drawings.

[0068] FIG. 1 is a schematic exploded view of a spectacle lens with various layers according to various embodiments.

[0069] FIG. 2 is a flow diagram of a method for producing a spectacle lens according to various embodiments, wherein in said method, an HOE-capable polymer layer that is suitable for forming an HOE is produced on a separate carrier.

[0070] FIG. 3 is a flow diagram of a method for producing a spectacle lens according to various embodiments, wherein in said method, an HOE-capable polymer layer that is suitable for forming the HOE is produced in situ on a substrate of the spectacle lens.

[0071] FIGS. 4-6 illustrate method steps of the method of FIG. 2 by means of schematic drawings of various production stages of the spectacle lens.

[0072] FIGS. 7-10 illustrate method steps of the method according to FIGS. 2 and 3 by means of schematic drawings of various production stages of the spectacle lens.

[0073] FIGS. 11-14 illustrate method steps of the method according to FIGS. 2 and 3 by means of schematic drawings of various production stages of the spectacle lens.

[0074] FIG. 15 is a schematic exploded view of a spectacle lens with various layers according to various embodiments.

[0075] FIG. 16 is a schematic exploded view of a spectacle lens with various layers according to various embodiments.

[0076] FIG. 17 is a schematic side view of data spectacles with an HOE according to various embodiments.

[0077] FIG. 18 is a schematic side view of data spectacles with an HOE according to various embodiments.

DETAILED DESCRIPTION OF EXAMPLES

[0078] In the following, the present invention is described in further detail by means of preferred embodiments with reference to the drawings. In the figures, the same reference numbers refer to the same or similar elements. The figures are schematic views of various embodiments of the invention. Elements shown in the figures are not necessarily drawn to scale. Rather, the various elements shown in the figures are shown in such a manner that their function and purpose become clear to the person skilled in the art.

[0079] In the following, techniques are explained in connection with the preparation of an HOE-capable material in a spectacle lens.

[0080] FIG. 1 shows a spectacle lens 100 according to various embodiments in an exploded schematic drawing. The spectacle lens can, for example, be used in spectacles such as data spectacles (not shown in FIG. 1). The spectacle lens 100 comprises a substrate 101. The center thickness 101a of the substrate 101 is typically approx. 1-3 mm. The substrate is transparent to light in the visible wavelength range.

[0081] An HOE-capable polymer layer 102 is arranged adjacent to the substrate 101. 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 reactant of the HOE polymer. The HOE polymer can be formed by means of local polymerization and/or diffusion processes of the polymer reactant, which in turn can lead to local variation in the refractive index. This can make it possible to implement an optical function of the spectacle lens 100. The HOE polymer or the photoreactive component can be embedded, for example, in a PUR-based polymer matrix. For example, one or two diffusion barrier layer(s) could be further provided adjacent to the polymer layer 102 (not shown in FIG. 1).

[0082] FIG. 1 further illustrates the layer thickness 102a of the HOE-capable polymer layer 102. The layer thickness 102a of the HOE-capable polymer layer is in a range of 1 m to 100 m, and preferably in a range of 50 m to 100 m. Typically, the effect on the optical properties of the spectacle lens 100 exerted by the HOE can be greater with increasing layer thickness 102a of the HOE-capable polymer layer 102. By means of greater layer thicknesses 102a, more complex optical functionalities can be implemented, i.e., for example, the optical path of the light through the HOE can be more strongly modified.

[0083] The spectacle lens 100 of FIG. 1 comprises a multilayer coating, further comprising a hard layer 103-1 and an antireflective layer 103-2. The layer thickness 103-1a of the hard layer 103-1 is in the range of 1 m to 3 m. The layer thickness 103-2a of the antireflective layer 103-2 is in the range of approx. 300 to 500 nm. For example, the antireflective layer 103-2 has an interference layer stack composed of oxidic materials such as SiO.sub.2, TiO.sub.2, ZrO.sub.2, and Al.sub.2O.sub.3 in a suitable sequence and layer thickness.

[0084] Alternatively or additionally, an antireflective layer can be provided on a back side 100b of the spectacle lens 100.

[0085] Optionally, for example, the spectacle lens 100 can comprise a clean-coat layer (not shown in FIG. 1). The clean-coat layer can, for example, adjacent to the antireflective layer 103-2, 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.

[0086] FIG. 1 shows a scenario in which the HOE-capable polymer layer 102 is arranged on a convex front side 181 of the substrate 101, which faces toward 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 toward the back side 100b of the spectacle lens 100.

[0087] FIG. 1 shows a scenario in which the spectacle lens 100 comprises an individual 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 (not shown in FIG. 1).

[0088] By means of a combination of a plurality of HOE-capable polymer layers 102, which, for example, form various HOEs, special optical functionalities can also be achieved by coherent or incoherent interaction of the various HOEs. This can be desirable, for example, in connection with the implementation of data spectacles. Examples of this are arrangements according to the actuator-compensator principle, cf. the German patent application with application no. 102014209792.4. As a further example of the arrangement, a multilayer system comprising a plurality of HOE-capable polymer layers forming various HOEs would be conceivable, said system being used for so-called angle multiplexing. In this case, the optical functionality of an individual HOE, for example focussing, is limited to a narrow viewing angle range of the spectacle wearer, while the other viewing angle ranges are unaffected by this HOE. In such a scenario, each layer of the multilayer system can contain a further HOE that is optically functional for a different viewing angle range. The HOEs act independently of one another, so that each constitutes an independent optical function for a defined viewing angle range. Together, their optical action extends over the entire viewing angle range.

[0089] FIG. 2 shows a flow diagram of a method for producing a spectacle lens 100 according to various embodiments. In this case, formation of the HOE-capable polymer layer 102 is not carried out in situ on the substrate 101, but separately on a separate carrier.

[0090] In step S1, the carrier is first coated with a precursor of the HOE-capable polymer layer 102. In this case, the precursor of the HOE-capable polymer layer 102, for example, can be liquid or solid; the precursor can, for example, be prepared in film form. The precursor of the HOE-capable polymer layer 102 cannot yet be suitable, or can be suitable only to a limited extent, for forming the HOE. For example, the precursor can comprise a special formulation of polymers that are suitable for forming the polymer matrix; it would also be possible for the precursor to comprise reactants of the polymers that are suitable for forming the polymer matrix, depending on whether or not a reactive conversion takes place in step S2. For example, the precursor can comprise further additives, such as, for example, a catalyst or a flow promoter, which are required for forming the polymer matrix. The precursor can, for example, contain photoreactive components, which, for example, can comprise monomers, initiators, and/or dyes, etc.

[0091] In step S2, the precursor for forming the HOE-capable polymer layer 102 is converted. In step S2, for example, thermal curing of the precursor can be carried out to form a stable film as the HOE-capable polymer layer 102; for example, the formulation can be converted by evaporation of the solvent into a solid film, for example, by forming the polymer matrix. Alternatively or additionally, reactive process steps that include 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. In step S2, for example, further additives and/or light-sensitive additives can be added to the precursor.

[0092] In step S3, the HOE-capable polymer layer 102 is fixed on the substrate 101. This is typically carried out by gluing or laminating of the HOE-capable polymer layer 102 onto the substrate. It would be possible to subsequently remove the carrier from the spectacle lens 100. However, it is also possible for the carrier to remain on the HOE-capable polymer layer 102.

[0093] In step S4, the HOE-capable polymer layer 102 is exposed to form the HOE. Step S4 is an optional step; however, step S4 should be carried out if the HOE is actually to be formed. In step S4, the polymer reactant is converted into the HOE polymer; in this case, reactive conversion of the photoreactive component, for example, a photomonomer or a photopolymer, takes place during polymerization and/or diffusion. This process results in spatially well-defined variation of the refractive index in the polymer layer, allowing optical features in the form of the HOE to be implemented.

[0094] FIG. 3 shows a flow diagram of a further method for producing a spectacle lens 100 according to various embodiments. In this case, the formation of the HOE-capable polymer layer 102 takes place in situ on the substrate 101. The substrate 101 is first coated with the precursor in step T1.

[0095] Step T2 involves conversion of the precursor for forming the HOE-capable polymer layer 102. Step T2 can be carried out according to step S1 of FIG. 2.

[0096] In step T3, the HOE-capable polymer layer 102 is exposed to form the HOE. Step T3 is an optional step; step T3 must be carried out if the HOE is actually to be formed. Step T3 can be carried out according to step S4 of FIG. 2.

[0097] With respect to both step S3 of FIG. 2 and step T1 of FIG. 3, it can 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 can be cleaned. Alternatively or additionally, the corresponding surface 181, 182 of the substrate 101 can be activated.

[0098] FIGS. 4-6 show schematic views of various production stages or production pieces of the spectacle lens 100 according to the method according to FIG. 2. In FIG. 4which shows a situation Athe HOE-capable polymer layer 102 is on the carrier 105. For example, the carrier 105 can comprise a film or a half shell. For example, the half shell can be configured in a concave or convex shape. The carrier 105 can be formed in a complementary manner to the front side 181 of the substrate 101. Adjacent to the HOE-capable polymer layer 102, furthermore, an adhesive/laminate coating 106 is arranged on the carrier 105. Alternatively or additionally to the adhesive/laminate coating 106, solvent adhesion techniques can also be used.

[0099] FIG. 5 shows a situation B 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. More particularly, the adhesive/laminate coating 106 is brought into contact with the front side 181 of the substrate 101. Alternatively or additionally, it would also be possible to apply the HOE-capable polymer layer 102 to the back side 182 of the substrate 101.

[0100] FIG. 6 shows a situation C in which the carrier 105 is detached from the HOE-capable polymer layer 102 and removed therefrom (indicated in FIG. 6 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 can be possible, for example, for the hard layer and/or the antireflective layer (neither shown in FIG. 6) to be formed on the outer surface of the carrier 105.

[0101] With this, situation C in the production process of the spectacle lens 100 is reached, in which the HOE-capable polymer layer 102 is arranged on the substrate 101. After this, coating with the hard layer 103-1 and/or the antireflective layer 103-2 and/or the clean-coat layer can be carried out (not shown in FIGS. 4-6). In general, it is also possible for the hard layer (not shown in FIGS. 4-6) to be already applied/laminated with the HOE-capable polymer layer 102.

[0102] FIGS. 7-10 and FIGS. 11-14 show various scenarios for exposure of the HOE-capable polymer layer 102 to form the HOE. In this case, a situation A is first shown in FIG. 7 in which the HOE-capable polymer layer 102 is arranged on the substrate 101. For example, an adhesive/laminate layer (not shown in FIG. 7) could 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, for example, comprises the photomonomer. In FIG. 7, a reaction of this photoreactive component of the polymer layer has not yet taken place. The HOE-capable polymer layer 102 comprises the polymer matrix.

[0103] FIG. 8 shows a situation B during exposure of the HOE-capable polymer layer 102. Exposure is carried out in a spatially resolved and phase-coherent manner, with a well-defined phase and intensity (indicated in FIG. 8 by the two solid arrows). In this manner, the HOE 900 is formed (cf. FIG. 9). FIG. 9 shows a situation C in which the HOE 900 has an identification or branding function. For this reason, it is sufficient for the HOE 900 to extend only over a partial area of the entire surface of the HOE-capable polymer layer 102.

[0104] However, it would also be possible for exposure to take place such that the HOE 900 modifies the optical functionalities of the spectacle lens 100 relating to visual defects in the eye of the spectacle wearer. More particularly, in such a case, it can be desirable if the HOE 900 essentially extends over the entire surface of the HOE-capable polymer layer 102 (not shown in FIG. 9). In this manner, it can be possible to homogeneously implement corresponding optical functionality in the area of the spectacle lens 101.

[0105] In situation D of FIG. 10, the HOE-capable polymer layer 102, which now forms the HOE 900, is coated with the hard layer 103-1. Optionally, coating with the antireflective layer 103-2 and/or the clean-coat layer can be carried out (not shown in FIG. 10).

[0106] FIGS. 11-14 shows further techniques relating to exposure of the HOE-capable polymer layer 102 to form the HOE 900. In these techniques, the HOE-capable polymer layer 102 is exposed after applying the hard layer 103-1.

[0107] In situation A of FIG. 11, the HOE-capable polymer layer 102 is formed on the substrate 101. FIG. 12 shows a situation 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 an HOE 900. However, the HOE 900 is not yet shown in the situation of FIG. 12.

[0108] FIG. 13 shows a situation C during exposure of the HOE-capable polymer layer 102. The exposure is carried out through the hard layer 103-1, wherein the hard layer 103-1 is transparent for a used wavelength of the exposure light. Optionally, it would also be possible, in situation C of FIG. 13, for an antireflective layer to be arranged on the hard layer 103-1 (not shown in FIG. 13). Exposure could then also be carried out through the antireflective layer. In this case, particularly high efficiency of exposure can be achieved, as it is possible to reduce reflection losses.

[0109] In situation D of FIG. 14, the HOE 900 is formed. This can be followed by fixation or bleaching in order to deactivate areas not exposed during the exposure. In this manner, subsequent modification, weakening, or destruction of the HOE 900 can be prevented. This is frequently also referred to as fixation of the HOE 900.

[0110] Techniques according to FIGS. 11-14 are advantageous in that the finished spectacle lens 100, for example in situation B according to FIG. 12, can be stored and exposed only at a later time in order to form the HOEs 900. This can allow particularly rapid production of the finished spectacle lens 100 with the formed HOE 900.

[0111] FIG. 15 illustrates a spectacle lens 100 according to various embodiments of the invention in a schematic exploded view. The spectacle lens 100 in FIG. 15 has two hard layers 103-1 and two antireflective layers 103-2. A primer layer 105 is arranged on the back side 182 of the substrate 101. The primer layer 105 is optional. By means of the primer layer 105, the spectacle lens 100 can be strengthened. Moreover, improved adhesion of the hard layer 103-1 arranged on the back side and the antireflective layer 103-2 to the substrate 101 can be achieved; this is comparable to the effect that can be achieved by the polymer layer 102 with respect to the hard layer 103-1 arranged on the front side and the antireflective layer 103-2.

[0112] In the scenario of FIG. 15, for example, it would also be possiblein addition to the primer layer 102to arrange a further primer layer on the front side 181 of the substrate 101 (not shown in FIG. 15). For example, the primer layer(s) could be applied using techniques of immersion coating.

[0113] With reference to FIG. 16, instead of the primer layer 105, a further HOE-capable polymer layer 112 could also be provided. In the scenario of FIG. 16, the HOEs 900 work together to implement optical functionality.

[0114] In the preceding, techniques were illustrated for providing an HOE-capable polymer layer 102 that is suitable for forming an HOE 900 in a spectacle lens 100. Such techniques show 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 layered structure of a conventional spectacle lens 100. More particularly, it is possible for a break-stabilizing action of the primer layer 105 to be achieved by means of the HOE-capable polymer layer 102. For this reason, it can be unnecessary to provide the primer layer 105. Certain stresses, which for example may occur during the ball drop impact test according to FDA standards, can be better withstood in this manner. Typically, the HOE polymer or polymer reactant or a polymer matrix, which is used in the HOE-capable polymer layer 102, is similar to a polymer used in the primer layer 105. For this reason, it can also be possible for similar polymer chemistry such as that known, for example, with respect to the primer layer 105, to be used for the treatment of the HOE-capable polymer layer 102. More particularly, favorable adhesion of the polymer of the HOE-capable polymer layer 102 to the substrate 101 can be achieved. For this purpose, the substrate 101, for example, can be cleaned and/or activated. Moreover, favorable adhesion of the hard layer 103-1 to the HOE-capable polymer layer 102 can be achieved. This can make it possible to ensure overall favorable strength and durability of the spectacle lens 101. Moreover, it is possible according to the above-described techniques to provide semifinished or finished lenses that already comprise the hard layer 103-1 and optionally the antireflective 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 HOEs 900 can be carried out in a needs-based and individual manner, for example in order to provide customer data and/or adapted optical corrections. By means of the above-described techniques, 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 means of the HOE 900 can be limited to a relatively minor extent. More particularly, it can also be possible to implement complex optical functionalities which, for example, go beyond a pure identification/branding function. By means of the above-described techniques, it is also possible to integrate more than one HOE-capable polymer layer 102 into the spectacle lens 100. More particularly, it can be possible to arrange a plurality of polymer layers 102, 112 on different sides 181, 182 of the substrate 101. In this manner, more complex optical functionalities can be achieved by means of the various HOEs 900 of the various polymer layers 102, 112.

[0115] In FIGS. 17 and 18, embodiments of the HOE 900 used in combination with data spectacles 1700 are illustrated. The HOE 900 reflects light emitted from a light source assembly 1750 of the data spectacles 1700. In this case, for example, the HOE 900 implements 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 shows imaging functionality.

[0116] Although only one individual HOE 900 is shown in each of FIGS. 17 and 18, the various optical functionalities implemented in connection with the data spectacles 1700 using the techniques of holography can also be implemented using two or more HOEs 900 interacting optically.

[0117] For purposes of clarity, only the substrate 101 and the HOE 900 are further illustrated in FIGS. 17 and 18; however, the spectacle lens 100 can also have an arrangement and number of elements as discussed above.

[0118] In detail, the data spectacles 1700 comprise a frame 1710. The frame 1710 has a housing in which the light source assembly 1750 is arranged. In general, the light source assembly 1750 can be configured in a wide variety of forms and comprise a variety of elements; for example, the light source assembly 1750 could comprise fewer or more elements than shown in FIGS. 17 and 18. In the example of FIGS. 17 and 18, the light source assembly 1750 comprises a display device 1751, such as, for example, a light-emitting diode (LED) display, a display with organic LED (OLED) technology, or a liquid crystal display (LCD). For example, the display device could comprise a LCD on silicon (liquid crystal on silicon, LCOS) display; more specifically, this could be used in connection with a pole splitter and an LED illumination unit arranged in the beam path behind the display device and in the direction of the spectacle lens 100. As a display device 1751, one could also use a laser light source, for example, in combination with a scanning device such as a moveable mirror, in order to scan the light beam over the retina of the eye of the user.

[0119] The light source assembly 1750 in the example of FIGS. 17 and 18 further has a filter element 1752 that filters light in a wavelength-specific manner. For example, the filter element 1752 can be a band pass element that selectively allows light of a specified wavelength band to pass through. More particularly, the filter element 1752 is optional.

[0120] The light source assembly 1750 further comprises an optical device 1753. The optical device 1753 is configured to guide light in the direction of the HOE 900 located in the spectacle lens 100. For this purpose, the optical device 1753 could comprise, for example, one or a plurality of lenses. The optical device 1753 could also alternatively or additionally comprise one or a plurality of mirrors, for example, one or a plurality of moveable mirrors.

[0121] In this manner, the light source assembly 1750 can be configured to emit light in the direction of the spectacle lens 100, more specifically, the HOE 900.

[0122] The HOE-capable polymer layer 102 or the HOE 900 is then configured to reflect the emitted light to the eye of a wearer of the data spectacles 1700. In the scenario of FIG. 17, the HOE 900 is arranged for this purpose adjacent to the front side 100a of the spectacle lens 100; in the scenario of FIG. 18, the HOE 900 is arranged for this purpose adjacent to the back side 100b of the spectacle lens 100. Here, in the scenario of FIG. 17, the light source assembly 1750 and the spectacle lens 100 are arranged with respect to each other such that the beam path of the light runs from the light source assembly 1750 to the HOE 900 inside the substrate 101 of the spectacle lens 100; here, internal reflection on the surfaces 100a, 100b of the spectacle lens 100 can be used for beam guidance (indicated in FIG. 17 by the broken line). In the scenario of FIG. 18, the light source assembly 1750 and the spectacle lens 100 are arranged with respect to each other such that the beam path of the light also runs from the light source assembly 1750 to the HOE 900 outside of the substrate 101 of the spectacle lens 100.

[0123] Of course, the features of the above-described embodiments and aspects of the invention can be combined with one another. More particularly, the features can be used not only in the described combinations, but also in other combinations or individually, without departing from the scope of the invention.

[0124] In the foregoing, the term spectacle lens was selected for purposes of simplicity and is not to be interpreted as limitative with respect to the material. More particularly, the spectacle lens can also be produced from one or a plurality of plastics.