Spectacle lens for a display device which can be placed on the head of a user and which generates an image, and display device comprising such a spectacle lens

Abstract

The invention relates to a spectacle lens for a display device (1) which can be placed on the head of a user and which generates an image, wherein the spectacle lens (3) has a front side (23) and a rear side (11), an entrance section (28) and a deflection section (18) spaced apart from the entrance section (28) along a first direction, and a light-guiding channel (21), wherein the spectacle lens (3) has a channel shell (13) in which the light-guiding channel (21) runs, and has a first lens (24; 25), wherein the light-guiding channel (21) guides light beams (L1) of the generated image, which light beams are coupled into the spectacle lens (3) via the entrance section (28), up to the deflection section (18), from which they are at least partially deflected in order to exit the spectacle lens (3) via the rear side (11), wherein the first lens (24; 25) is connected to the channel shell (13) and has an imaging effect, and wherein in the first lens, a first stop element (26, 26') is formed which absorbs propagating scattered light (30, 30') in the first lens (24, 25).

Description

[0001] Spectacle lens for a display device that can be placed on a user's head and produces an image, and display device with such a spectacle lens

[0002] The present invention relates to a spectacle lens for a display device that can be placed on the head of a user and produces an image, and to a display device comprising such a spectacle lens.

[0003] Such a spectacle lens can have two lenses (a push and a pull lens) and a waveguide located between them. When the lens is used as intended, the pull lens is closer to the user's eye than the push lens. Since collimated light with a focal plane at infinity is generally used to transport the generated image through the waveguide, the pull lens has a negative refractive power to shift the focus of the virtual image towards the near field for the user. For viewing the surroundings, the influence of the pull lens is compensated for by the positive refractive power of the push lens.

[0004] With such a lens, light can be unintentionally coupled into the push and / or pull lens, where their outer surfaces can act as parasitic light guides, directing the coupled light as scattered light with almost no loss. If this scattered light then propagates through the parasitic light guide and encounters optically functional structures, such as diffraction gratings or mirrors, or optically non-functional structures, such as lens edges or frame geometries, this scattered light can reach the user's eye and cause, for example, double vision, disturbing distorted and color-altered sections of the virtual image superimposed on the desired virtual image, or a laterally blurred image.

[0005] The cause of the scattered light paths in such a parasitic light guide can be, for example, design-related high angles of incidence on the output coupler of the spectacle lens.

[0006] Based on this, the object of the invention is to provide a spectacle lens for a display device that can be placed on a user's head and generates an image, in which the aforementioned difficulties are avoided as far as possible. Furthermore, a display device with such a spectacle lens is to be provided. The invention is defined in independent claims 1 and 12. Advantageous embodiments are specified in the dependent claims.

[0007] A spectacle lens is provided for a display device that can be placed on a user's head and generates an image. The spectacle lens has a front and a back, an entry section, and a deflecting section spaced from the entry section along a first direction, as well as a light-guiding channel. The spectacle lens further comprises a channel shell in which the light-guiding channel runs and a first lens. The light-guiding channel directs light beams of the generated image, which are coupled into the spectacle lens via the entry section, to the deflecting section, from which they are at least partially deflected to exit the spectacle lens via the back.The first lens is connected to the channel shell (preferably with its first lens side facing the channel shell) and has an imaging effect, wherein a first aperture element is formed in the first lens, which absorbs scattered light propagating in the first lens.

[0008] The first aperture element can thus be used, for example, to block or interrupt a parasitic scattered light path in the first lens.

[0009] The first aperture element can be positioned along the first direction between the entrance section and the deflection section.

[0010] The first lens can have a recess in which the first aperture element is arranged. In particular, the recess can extend from the first lens side into the first lens. Additionally or alternatively, the recess (or a further recess) can extend from its lens side facing away from the channel shell into the first lens. If a further recess is provided, another first aperture element can be arranged in it. The recess (and optionally the further recess) can be filled with a transparent material that preferably has the same refractive index as the material of the first lens.

[0011] The first aperture element can be designed as an aperture element buried in the first lens.

[0012] The first aperture element can be planar. In particular, the first aperture element can extend transversely to the first direction. Additionally or alternatively, at least one first aperture element can be flat or curved. The spectacle lens can have several first aperture elements spaced apart along the first direction.

[0013] In particular, at least two first aperture elements can be provided, which are aligned parallel to each other.

[0014] The first aperture element may contain an absorbent adhesive.

[0015] The first aperture element can be positioned closer to the entrance section than to the deflection section along the first direction.

[0016] The first lens surface can be planar and / or the first canal surface of the canal shell facing the first lens surface can be planar. The first lens surface can be planar. In particular, the planar first lens surface and the planar first canal surface can be parallel to each other.

[0017] However, it is also possible that the first lens side and / or the first canal side are curved.

[0018] The channel shell can be designed as a plane-parallel plate (at least in the area of ​​the light-guiding channel). Furthermore, the channel shell can be designed as a curved shell. The curvature of the channel side facing the first lens side can be, for example, spherical. Additionally, the channel side facing away from the first lens side can be curved (e.g., spherically curved). The first lens side can have a curvature that is complementary to the curvature of the channel side facing the first lens side.

[0019] The first lens and / or the canal shell can be made of plastic, e.g., a polymer material (e.g., thiourethane, episulfide, Mitsui resin (MR-8, MR-7, MR-10, MR-174), polycarbonate (PC), polyallyldiglycol carbonate (CR-39), and polyamide), or of glass (e.g., mineral glass material).

[0020] The first lens can be refractive and / or diffractive. Additionally or alternatively, the first lens can be a Fresnel lens.

[0021] Alternatively or additionally, surfaces forming the interfaces can have an anti-reflective coating to reduce reflections. The surfaces of the first lens that border air can also be provided with an anti-reflective coating.

[0022] The side of the first lens facing away from the channel shell may be coated with a hard layer or hardcoat.

[0023] The spectacle lens according to the invention can be used to provide display devices (e.g. HMDs) that can be placed on a user's head and generate an image.

[0024] The spectacle lens can have an exit point on its back surface through which the deflected light beams exit the lens. Furthermore, the deflecting section can redirect the light beams, which have been guided up to it, towards the exit point in such a way that they exit the lens through the exit point and are thus coupled out of the lens.

[0025] The deflection section and the exit section can be spatially separated sections. However, it is also possible for the deflection section and the exit section to coincide spatially, e.g., if the deflection section is designed as a surface lattice.

[0026] In the first spectacle lens, the deflection section can have a single reflective or semi-reflective deflection element or several reflective and / or semi-reflective deflection elements arranged side by side. With several reflective or semi-reflective deflection elements arranged side by side, a desired deflection function and, if necessary, a certain imaging function of the deflection section can be achieved, for example, in a Fresnel-like manner (this can, of course, also be achieved with a single reflective or semi-reflective deflection element). The reflective or semi-reflective deflection elements can be reflective or semi-reflective surface sections, which can also be referred to as reflective or semi-reflective facets. The reflective or semi-reflective surface sections can each be planar. However, it is also possible that the reflective or semi-reflective surfaces are not flat or spherical.The partially reflective surface sections themselves are curved (for example, spherically or aspherically curved, or freeform). Similarly, the single reflective or partially reflective deflecting element can be flat or curved (for example, spherically or aspherically curved, or freeform).

[0027] Additionally or alternatively, the deflection section can include at least one holographic element, at least one volume holographic element, and / or at least one diffractive element. The reflectivity of the respective reflective deflection elements (or the single reflective deflection element) can, for example, range from 2% to 100% (including the limits of this range). Thus, the reflective deflection elements can be partially reflective or fully reflective.

[0028] The spectacle lens according to the invention can in particular have a curved back surface and / or a curved front surface. The entry section can be formed in the back surface and / or in the channel shell.

[0029] For guiding light within the channel lining, the light beams can be reflected once, twice, three times, or more. This can involve total internal reflection or reflection at a reflective coating or layer. The reflective coating or layer can be partially reflective and / or angle-selective.

[0030] A second lens may be provided, which is connected to the channel shell (preferably with its lens surface facing the channel shell), and which has an imaging effect. The second lens may contain at least one second aperture element that absorbs stray light propagating within the second lens.

[0031] The second lens and / or the second aperture element can be designed in the same way as the first lens or the first aperture element.

[0032] Furthermore, a display device is provided comprising a holding device that can be placed on the user's head, an image generation module attached to the holding device which generates an image, and a spectacle lens according to the invention (including the described further developments) attached to the holding device, wherein the generated image is coupled into the spectacle lens via the entry section, guided in the channel shell by at least one reflection to the deflection section and at least partially deflected at the deflection section in order to exit the spectacle lens via the back, so that the user can perceive the generated image as a virtual image when the holding device is placed on the head.

[0033] A display device is provided comprising a holding device that can be placed on the user's head, an image generation module attached to the holding device which generates an image, and a spectacle lens according to the invention (including all further developments) attached to the holding device, wherein the generated image is coupled into the first shell via the entry section, guided in the first shell by at least reflection to the deflection section and deflected at the first deflection section to exit the spectacle lens via the inner shell, so that the user can perceive the generated image as a virtual image when the holding device is placed on the head.

[0034] The display device can include a control unit that controls the image generation module. In particular, the control unit can control the image generation module based on supplied image data.

[0035] The image generation module and / or an image sensor unit of the image generation module may, in particular, comprise a planar image sensor, such as an LCD module, an LCoS module, an OLED module, a pLED, or a tilting mirror matrix. Each image sensor may have a plurality of pixels, which may be arranged, for example, in rows and columns. Each image sensor may, for example, be self-illuminating or non-self-illuminating.

[0036] Each image sensor can preferentially produce a monochromatic image, while different image sensors can produce monochromatic images with different wavelengths.

[0037] The image generation module can, for example, comprise a polychromatic image source, a combination of two or more monochromatic image sources, or a combination of a duochromatic and a monochromatic image source. Typical configurations of such image generation modules with multiple image sources include a superposition unit that combines the light beams of the multiple image sources into a single, common light beam. Such a superposition unit can be implemented, for example, as a beam splitter cube (also called an X-cube) or as a so-called rod combiner, both of which are known to those skilled in the art.

[0038] Since the diverting section should be as invisible as possible and should also have as little impact as possible on the light reaching the viewer's eye from the surroundings, diverting sections with high transmission and, consequently, low reflectivity for the light beam(s) of the at least two-color image are generally preferred. Typical values ​​for the reflection-to-transmission ratio are 50%, 30%, 10%, or 2%, distributed evenly across the visible wavelength range.

[0039] It is understood that the features mentioned above and those to be explained below can be used not only in the combinations given, but also in other combinations or on their own, without leaving the scope of the present invention.

[0040] The invention is explained in more detail below with reference to exemplary embodiments and the accompanying drawings, which also disclose essential features of the invention. These exemplary embodiments serve only for illustration and are not to be interpreted as limiting. For example, a description of an exemplary embodiment with a plurality of elements or components is not to be interpreted as meaning that all of these elements or components are necessary for implementation. Rather, other exemplary embodiments may also contain alternative elements and components, fewer elements or components, or additional elements or components. Elements or components of different exemplary embodiments may be combined with one another unless otherwise specified. Modifications and variations described for one of the exemplary embodiments may also be applicable to other exemplary embodiments.To avoid repetition, identical or corresponding elements in different figures are designated with the same reference symbols and are not explained multiple times. The figures show:

[0041] Fig. 1 is a schematic perspective representation of an embodiment of the display device according to the invention;

[0042] Fig. 2 shows an enlarged partial sectional view of the first spectacle lens including a schematic representation of the first image generation module according to Fig. 1;

[0043] Fig. 3 shows an enlarged partial sectional view of a conventional spectacle lens to illustrate a parasitic light guide path;

[0044] Fig. 4 shows an enlarged partial sectional view of the first spectacle lens to illustrate the design of the aperture elements according to an exemplary embodiment;

[0045] Fig. 5 shows an enlarged partial sectional view of the first spectacle lens to illustrate the design of the aperture elements according to a further embodiment, and

[0046] Fig. 6 shows an enlarged partial sectional view of the first spectacle lens including a schematic representation of the first image generation module in the same way as in Fig. 2 to illustrate a further embodiment.

[0047] In the embodiment shown in Fig. 1, the display device 1 according to the invention comprises a holding device 2 that can be placed on the user's head, which can, for example, be designed in the manner of a conventional eyeglass frame, as well as a first and a second lens 3, 4, which are attached to the holding device 2. The first lens 3 and / or the second lens 4 can each be designed as a lens according to the invention. The holding device 2 with the lenses 3, 4 can, for example, be designed as sports glasses, sunglasses, and / or glasses for correcting a visual impairment, wherein a virtual image can be projected into the user's field of vision via the first lens 3, which can also be referred to as a multifunctional lens, as described below.

[0048] The display device 1 includes an image generation module 5, which can be arranged in the area of ​​the right temple of the holding device 2, as shown schematically in Fig. 1.

[0049] The image generation module 5 can include an image sensor unit 7 for generating a first image, as schematically illustrated in Fig. 2. For this purpose, the image sensor unit 7 comprises a planar image generation element 8, to which an image sensor optic 9 is arranged. The planar image generation element 8 can, for example, be an OLED element, an LCD element, an LCoS element, a pLED, or a tilting mirror matrix, each comprising a plurality of pixels arranged, for example, in rows and columns. A single light beam L1 is schematically depicted as a representative of the light beams emitted by the planar image generation element 8.

[0050] As can be further seen in Fig. 2, a control unit 10 with, for example, a processor P and a memory M is provided for controlling the image generation module 5. The control unit 10, which can, for example, be arranged on the holding device 2, controls the image generation module 5 and, in particular, the image generation element 8, depending on the supplied image data, so that the first image is generated according to the image data. The light beams L1 emitted by the image generation element 8 pass through the image sensor optics 9 and then enter the first spectacle lens 3. The area of ​​entry can also be referred to as the entry surface 12.

[0051] The first spectacle lens 3 is multi-layered and has a channel shell 13, an outer shell 24 (hereinafter also referred to as outer lens 24), and an inner shell 25 (hereinafter also referred to as inner lens 25). The channel shell 13 is the middle shell located between the outer shell 24 and the inner shell 25.

[0052] The outer lens 24 has a lens side 34 facing the channel shell 13 and a lens side 35 facing away from the channel shell 13, and the channel shell 13 has a channel side 36 facing the outer lens 24, wherein the lens side 34 is in direct contact with the channel side 36 in order to enable total internal reflection of the light beams L1 guided in the light guidance channel 21 at the channel side 36 (the refractive indices of the outer lens 24 and the channel shell 13 are chosen accordingly).Similarly, the inner lens 25 has a lens side 37 facing the channel shell 13 and a lens side 38 facing away from the channel shell 13, and the channel shell 13 has a channel side 39 facing the inner lens 25, with the lens side 37 being in direct contact with the channel side 39 to allow total internal reflection of the light beams L1 guided in the light guiding channel 21 at the channel side 39 (the refractive indices of the inner lens 25 and the channel shell 13 are chosen accordingly).

[0053] In the embodiment described here, the channel shell 13 is designed as a plane-parallel plate, except for the area of ​​the entrance surface 12. The inner shell 25 is designed as a lens 25 with negative refractive power, and the outer shell 24 is designed as a lens with positive refractive power. The side of the outer shell 24 facing away from the channel shell 13 forms the front 23 of the first spectacle lens 3, and the side of the inner shell 25 facing away from the channel shell 13 forms the back 11 of the first spectacle lens 3.

[0054] Due to the refractive indices of the outer and inner lenses 24, 25 and the canal shell, the light beams L1 are only reflected if their angle of incidence is 9°. E With respect to the surface perpendicular F (shown as a dashed line in Fig. 2) of a surface element where total internal reflection is to take place, the corresponding critical angle 0 is larger. C For total internal reflection. For angles of incidence in the range of 0° to the critical angle 0°.C The canal shell 13 is transmissive, so that the user can perceive the surroundings with his eye A through the first lens 3, as indicated by the arrow U in Fig. 2.

[0055] These transmission and reflection properties are predominantly present for radiation from the visible wavelength range.

[0056] Furthermore, the channel shell 13 has a buried deflection section 18, which includes one (or more, not shown in Fig. 2) partially reflective deflection element 19, which can also be referred to as a partially reflective facet 19. Alternatively or additionally, the deflection section 18 can have a diffractive deflection element 19.

[0057] As previously described, the light beams L1 enter the first lens 3 via the entrance surface 12. The entrance surface 12 is formed on a lateral entrance section 28 of the channel shell 13, which, in the embodiment described here, projects laterally beyond the outer and inner shells 24, 25. In addition to the entrance surface 12, the lateral entrance section 28 has a (here planar) deflecting surface 29, which deflects the light beams L1 in a first direction (here the y-direction) towards the deflecting section 18 such that the light beams L1 are guided by total internal reflection at the interfaces between the channel shell 13 and the outer and inner shells 24, 25 to the deflecting section 18.The deflecting section 18 then deflects the light beams L1 such that the deflected light beams L1 exit the first lens 3 via the inner lens 25 and thus via the back surface 11, creating a virtual image that the user can perceive with their eye A. The area through which the light beams L1 exit can also be referred to as the exit section 22 or exit surface 22.

[0058] Thus, in the channel shell 13 there is a light guidance channel 21 which extends along the first direction from the entry section 12 to the deflection section 18.

[0059] Since collimated light L1 with a focal plane at infinity is generally used to transport the generated image in the channel shell 13 (which can also be called a waveguide), the inner lens 25 has a negative refractive power in order to pull the focus of the virtual image to the near range for the user (e.g., 0.5 m - 2 m). Therefore, the inner lens 25 can also be called a pull lens 25.

[0060] For viewing the surroundings, the influence of the pull lens 25 is compensated by the outer lens 24 with positive refractive power. Therefore, the outer lens 24 can also be referred to as a push lens 24. Optionally, the outer lens 24 can be omitted. The outer shell 24 can be omitted, for example, if the focus position of the virtual image is not adjusted. In this case, the pull lens 25 is preferably only required for refractive error correction.

[0061] In addition to adjusting the focus plane of the virtual image, the Pull lens 25 can be used for individual refractive correction for users with visual impairments.

[0062] As schematically shown in Figure 3, stray light 30 can be unintentionally coupled, for example, into the inner lens 25, such that the inner lens 25 guides the stray light 30 almost without loss as a parasitic light-guiding channel 31 (for example, through total internal reflection at the interface of the lens surface 38 with the environment). Figure 3 shows a conventional spectacle lens, and elements identical or similar to those of the spectacle lens according to Figure 2 are designated with the same reference numerals. After propagation in the parasitic light-guiding channel 31, the stray light 30 can then encounter optically functional structures, such as the deflecting section 18, as shown in Figure 3. The stray light 30 is then coupled out towards the eye A by means of the deflecting section 18, which, for example,This can lead to disturbingly distorted and color-altered sections of the virtual image that overlay the actually desired virtual image, and / or can also cause, for example, a laterally "smeared" image. In addition to or besides the optically functional structures, the scattered light 30 can also be deflected towards the eye A via lens edges or frame geometries.

[0063] To prevent this, several aperture elements 26 are formed in the inner lens 25, which absorb the scattered light 30 so that it cannot reach the eye A, as shown schematically in Figure 2. The aperture elements 26 can, for example, be an absorbing adhesive, preferably index-matched to the material of the inner lens 25. An index-matched adhesive is understood to be, in particular, an adhesive whose refractive index at a wavelength of 550 nm differs from that of the material of the inner lens 25 at a wavelength of 550 nm by no more than 0.1.

[0064] The arrangement of the aperture elements 26 is preferably as close as possible to the entrance section 12 and thus near the temporal side of the (not shown) spectacle lens frame. The orientation of the aperture elements 26 can also be such that they meet aesthetic requirements. Near the spectacle lens frame, they can advantageously be arranged in an inconspicuous manner and be at least partially concealed by frame elements.

[0065] For large fields of view, for example, the arrangement of the aperture elements 26 near the nasal side of the mount or near the exit section 22 may be advantageous.

[0066] It is additionally or alternatively possible to arrange the aperture elements 26 above or below with respect to the x-direction (especially in embodiments with two-dimensional pupil replication including directional folding).

[0067] The aperture elements 26 can, for example, be formed as absorbing coatings on predetermined sides of recesses 32 formed in the inner lens 25. After application of the coatings, the recesses 32 are filled with a material of the same refractive index as the inner lens 25 up to the lens side 37 facing the channel shell 13, so that a smooth and continuous lens side 37 is present, as shown in Figure 4. The aperture elements 26 are thus planar and extend transversely to the first direction. Furthermore, the aperture elements 26 are thus embedded in the inner lens 25. It is possible for the aperture elements 26 to extend to the lens side 37 or not to extend to the lens side 37 and thus be spaced from it. In the embodiment shown in Figure 4, the aperture elements 26 are planar.However, it is also possible that the aperture elements 26 are curved (not shown).

[0068] Figure 5 shows another embodiment in which a single recess 32 is formed, for example, in the shape of a parallelepiped. Parallelepiped-shaped transparent inserts 33 are arranged in this recess, on which absorbing coatings are formed as aperture elements 26, extending transversely to the first direction. The inserts 33 are fixed in the recess 32 with a transparent adhesive, so that again a smooth and continuous lens surface 37 is present. This implementation can be described as partial segmentation of the inner lens 25.

[0069] In the described embodiments, the aperture elements 26 are aligned parallel to each other. However, it is also possible that the aperture elements 26 are not aligned parallel to each other.

[0070] The described scattered light 30 can also occur if an angle-selective reflective layer 40 is arranged between the outer lens 24 and the channel shell 13, and if an angle-selective reflective layer 41 is arranged between the inner lens 25 and the channel shell 13. The angle-selective reflective layers 40, 41 are designed such that light beams L1 are only reflected if their angle of incidence 9 E With respect to the surface perpendicular F (shown as a dashed line in Fig. 6) of a surface element at which the reflection is to take place, the corresponding critical angle 0 is larger. G For angles of incidence in the range from 0° to the critical angle 0 G The canal shell 13 is transmissive, so that the user can perceive the surroundings with his eye A through the first lens 3, as indicated by the arrow U in Fig. 6.

[0071] Even with such spectacle lenses, the unwanted scattered light 30 can be absorbed by the aperture elements 26, so that the aperture elements 26 block the corresponding parasitic light guiding channel in the inner lens 25.

[0072] Of course, the aperture elements 26', which can be designed in the same way as the aperture elements 26 already described, can additionally or alternatively be arranged in the outer lens 24 in order to absorb any stray light 30' that may propagate in the outer lens 24, as shown by way of example in Figure 6.

[0073] In the display device 1 according to the invention, the virtual image is projected into the user's field of vision via the first lens 3. Projection via the second lens 4 is also possible. Furthermore, the display device 1 can be designed such that information or virtual images are projected via both lenses 3 and 4. The projection can be such that a three-dimensional image impression is created. However, this is not mandatory. The lenses 3 and 4 can have a refractive power of zero or a non-zero refractive power (particularly for correcting refractive errors). In particular, both the front surface 23 and the back surface 11 can be curved. The front surface 23 is, in particular, spherically curved.If the spectacle lens 3, 4 has a non-zero refractive power to correct a refractive error, the curvature of the back surface 11 is usually selected accordingly to achieve the desired correction. The back surface 11 may have a curvature that deviates from a spherical shape. Of course, it is also possible that the curvature of the back surface, together with the curvature of the front surface 23, achieves the desired refractive error correction. The holding device 2 need not be designed as a spectacle-like holding device. Any other type of holding device is also possible, allowing the display device 1 to be placed on and worn on the head.

Claims

Patent claims 1. Spectacle lens for a display device (1) that can be placed on the head of a user and generates an image, wherein the spectacle lens (3) has a front (23) and a back (11), an entry section (28) and a deflection section (18) spaced apart from the entry section (28) along a first direction, and a light guiding channel (21), wherein the spectacle lens (3) has a channel shell (13) in which the light guiding channel (21) runs and a first lens (24; 25), wherein the light guiding channel (21) guides light beams (L1) of the generated image, which are coupled into the spectacle lens (3) via the entry section (28), to the deflection section (18), from which they are at least partially deflected to exit the spectacle lens (3) via the back (11), wherein the first lens (24;25) is connected to the channel shell (13) and has an imaging effect, and wherein a first aperture element (26, 26') is formed in the first lens which absorbs propagating scattered light (30, 30') in the first lens (24, 25).; 2. Spectacle lens according to claim 1, wherein the first aperture element (26, 26') is positioned along the first direction between the entrance section (28) and the deflection section (18).

3. Spectacle lens according to one of the above claims, wherein the first lens (24; 25) has a recess (32) in which the first aperture element (26, 26') is arranged.

4. Spectacle lens according to claim 3, wherein the recess (32) extends from a first lens side (34; 37) facing the channel shell (13) into the first lens (24; 25).

5. Spectacle lens according to one of the above claims, wherein the first aperture element (26, 26') is formed as a planar element.

6. Spectacle lens according to claim 5, wherein the first aperture element (26, 26') extends transversely to the first direction.

7. Spectacle lens according to one of the above claims, wherein several first aperture elements (26, 26') are provided, which are spaced apart along the first direction.

8. Spectacle lens according to claim 7, wherein at least two first aperture elements (26, 26') are provided which are aligned parallel to each other.

9. Spectacle lens according to one of the above claims, wherein the first aperture element (26, 26') comprises an absorbent adhesive.

10. Spectacle lens according to one of the above claims, wherein the first aperture element (26, 26') is positioned along the first direction closer to the entrance section (28) than to the deflection section (18).

11. Spectacle lens according to one of the above claims, wherein a second lens (24; 25) is provided which is connected to the channel shell (13) and has an imaging effect, and wherein at least one second aperture element (26, 26') is formed in the second lens (24; 25) which absorbs propagating scattered light (30, 30') in the second lens (24; 25).

12. Display device comprising a holding device (2) that can be placed on the head of a user, an image generation module (5) attached to the holding device (2) which generates an image, and a spectacle lens (3) attached to the holding device (2) according to one of the above claims, wherein the generated image is coupled into the spectacle lens via the entry section (28), guided in the channel shell (13) by at least one reflection to the deflection section (18) and at least partially deflected at the deflection section (18) to exit the spectacle lens (3) via the back side, so that the user can perceive the generated image as a virtual image when the holding device (2) is placed on the head.

Images