Lens module and AR glasses

Abstract

The utility model relates to the field of near-eye display equipment, and discloses a lens module and AR glasses, and the lens module of one embodiment comprises an optical waveguide assembly which comprises an optical waveguide lens of which at least one side is provided with a grating structure; the first coating layer is arranged on the far-eye side of the optical waveguide assembly; and the near-eye lens assembly comprises an optical lens arranged on the near-eye side of the optical waveguide assembly. The lens module of another embodiment comprises an optical waveguide lens with a grating structure formed on at least one side; the near-eye lens assembly comprises an optical lens which is arranged on the near-eye side of the optical waveguide assembly, and the distance between the optical lens and the optical waveguide assembly is 0.01-10 mm; and no blue light prevention structure is arranged between the optical waveguide assembly and the near lens assembly. The first coating layer is moved to the far-eye side of the optical waveguide assembly, or the blue light preventing structure in the lens module is removed to avoid double images, ghosting images and the like, the overall transmittance of the lens is improved, and the definition and the use experience of a user using AR glasses to watch the real world are improved.

Description

Technical Field

[0001] The present application relates to the field of near-eye display devices, and in particular to a lens module and AR glasses. Background Art

[0002] With the advancement of optical display technology, a new generation of near-eye display devices such as AR (Augmented Reality) devices are gradually emerging, such as AR glasses. At present, the optical waveguide solution has gradually become the mainstream AR solution, that is, the lens module in AR glasses can display virtual projection information generated by optical waveguides, and can also pass through the light of the real world like ordinary glasses lenses, so that the real world image and virtual projection information are superimposed into the user's field of view, realizing augmented reality display.

[0003] In AR glasses, common lens modules include an optical waveguide lens and an upper cover glass and a lower cover glass located on both sides of the optical waveguide lens. When assembling AR glasses, a near-eye lens is used on the near-eye side of the optical waveguide lens. The near-eye lens includes but is not limited to a refractive lens or a plano lens.

[0004] In the related art, when the near-eye lens is adapted to the optical waveguide lens, due to the mutual reflection between the near-eye lens and the optical waveguide lens, the user will see double images, ghost images or rainbow patterns, etc., resulting in the user's unclear view of the real world when using AR glasses and a poor user experience. Summary of the invention

[0005] The embodiments of the present application provide a lens module and AR glasses, which are intended to improve the overall light transmittance of the lens module and eliminate interfering images such as double images, ghost images, or rainbow mosquitoes that appear in the user's field of view when the user uses the AR glasses, thereby improving the clarity and user experience of the user using the AR glasses to view the real world.

[0006] In a first aspect, an embodiment of the present application provides a lens module of AR glasses, the lens module comprising:

[0007] The optical waveguide component has a near-eye side and a far-eye side opposite to each other, and the optical waveguide component at least includes an optical waveguide lens, and the optical waveguide lens has a grating structure formed on at least one side;

[0008] A first coating layer, the first coating layer is disposed on the far-eye side of the optical waveguide component;

[0009] The near-eye lens assembly at least comprises an optical lens, and the optical lens is arranged on the near-eye side of the optical waveguide assembly.

[0010] In a second aspect, the embodiment of the present application also provides another lens module of AR glasses, the lens module comprising:

[0011] The optical waveguide component has a near-eye side and a far-eye side opposite to each other, and the optical waveguide component at least includes an optical waveguide lens, and the optical waveguide lens has a grating structure formed on at least one side;

[0012] A near-eye lens assembly, comprising at least an optical lens, the optical lens being arranged on the near-eye side of the optical waveguide assembly, and the distance between the optical lens and the optical waveguide assembly is 0.01-10 mm;

[0013] Among them, no anti-blue light structure is set between the optical waveguide component and the optical lens.

[0014] In a third aspect, an embodiment of the present application further provides an AR glasses, the AR glasses comprising:

[0015] A mirror frame module, the mirror frame module includes a mirror frame assembly and a mirror leg assembly connected to the mirror frame assembly;

[0016] Any lens module provided in the embodiments of the present application, and the lens module is installed in a frame assembly;

[0017] The optical-mechanical module is connected to at least one of the frame assembly and the temple assembly and is arranged corresponding to the lens module, and is used to output an optical signal to the lens module.

[0018] In summary, the embodiments of the present application provide a lens module and AR glasses, wherein the lens module provided by one embodiment includes: an optical waveguide component, having a near-eye side and a far-eye side relative to each other, the optical waveguide component at least includes an optical waveguide lens, and the optical waveguide lens has a grating structure formed on at least one side; a first coating layer, the first coating layer is arranged on the far-eye side of the optical waveguide component; a near-eye lens component, the near-eye lens component at least includes an optical lens, and the optical lens is arranged on the near-eye side of the optical waveguide component.

[0019] A lens module provided in another embodiment includes: an optical waveguide component having a near-eye side and a far-eye side relative to each other, the optical waveguide component at least including an optical waveguide lens, and the optical waveguide lens has a grating structure formed on at least one side; a near-eye lens component, at least including an optical lens arranged on the near-eye side of the optical waveguide component, and the distance between the optical lens and the optical waveguide component is 0.01-10mm; wherein, no anti-blue light structure is arranged between the optical waveguide component and the near-eye lens component.

[0020] In the embodiments provided in the present application, by moving the first coating layer originally located on the near-eye side of the optical waveguide component to the far-eye side of the optical waveguide component, the formation of interfering images such as ghosting and ghosting can be avoided while maintaining the original anti-blue light effect, or the anti-blue light structure from the optical waveguide component to the near-eye lens component is directly removed to avoid the formation of interfering images such as ghosting and ghosting, thereby improving the overall light transmittance of the lens module, thereby improving the clarity and usage experience of users using AR glasses to view the real world. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For those skilled in the art, other drawings can be obtained based on these drawings without creative work.

[0022] Figure 1 This is a schematic diagram of the optical effect of a lens module of AR glasses in the prior art;

[0023] Figure 2 A schematic structural diagram of a first implementation of a lens module provided in an embodiment of the present application;

[0024] Figure 3 A schematic structural diagram of a second implementation of a lens module provided in an embodiment of the present application;

[0025] Figure 4 A schematic structural diagram of a third implementation of a lens module provided in an embodiment of the present application;

[0026] Figure 5 A schematic structural diagram of a fourth implementation of a lens module provided in an embodiment of the present application;

[0027] Figure 6 A schematic structural diagram of a fifth implementation of a lens module provided in an embodiment of the present application;

[0028] Figure 7 A schematic structural diagram of a sixth implementation of a lens module provided in an embodiment of the present application;

[0029] Figure 8 A structural schematic diagram of a seventh implementation of a lens module provided in an embodiment of the present application;

[0030] Fig. 9 A structural schematic diagram of a seventh implementation of a lens module provided in an embodiment of the present application;

[0031] Fig.10 A schematic structural diagram of a first implementation of a lens module provided by another embodiment of the present application;

[0032] Fig.11 A schematic diagram of the structure of a second embodiment of a lens module provided in another embodiment of the present application

[0033] Fig.12 A schematic structural diagram of a third implementation of a lens module provided by another embodiment of the present application;

[0034] Fig.13A schematic structural diagram of a fourth implementation of a lens module provided by another embodiment of the present application;

[0035] Fig.14 A schematic structural diagram of a fifth implementation of a lens module provided by another embodiment of the present application;

[0036] Fig.15 A schematic structural diagram of a sixth implementation of a lens module provided by another embodiment of the present application;

[0037] Fig.16 A structural schematic diagram of a seventh implementation manner of a lens module provided by another embodiment of the present application;

[0038] Fig.17 A schematic diagram of the structure of an AR glasses provided in an embodiment of the present application.

[0039] Reference numerals:

[0040] 1. AR glasses; 10. lens module; 11. optical waveguide component; 111. optical waveguide lens; 1111. grating structure; 112. protective member; 1121. first cover plate; 1122. second cover plate; 1123. first anti-reflection layer; 1124. second anti-reflection layer; 113. first anti-reflection element; 114. second anti-reflection element; 115. first surface; 1151. first target area; 1152. second target area; 116. second surface; 1161. third target area; 1162. fourth target area; 12. first coating layer; 13. near-eye lens assembly; 131. optical lens; 14. second coating layer; 15. composite layer; 16. colloid; 20. frame module; 21. frame assembly; 211. front frame; 212. temple connecting part; 22. temple assembly; 30. optical machine module. DETAILED DESCRIPTION

[0041] The technical solutions of the embodiments of the present application will be described below in conjunction with the drawings in the embodiments of the present application. It is obvious that the described embodiments are some embodiments of the present application, rather than all embodiments. Based on the embodiments of the present application, other embodiments obtained by ordinary technicians in this field without making creative work belong to the scope of protection of this application. Described herein are only specific embodiments of the present application, but the scope of protection of the present application is not limited thereto. Any technician familiar with the technical field can easily think of various equivalent modifications or replacements within the technical scope disclosed in this application, and these modifications or replacements should be included in the scope of protection of this application. Therefore, the scope of protection of the present application shall be based on the scope of protection of the claims.

[0042] First, the design of the lens module in the existing AR glasses and the visual effects brought by these designs are explained in detail. Figure 1 , Figure 1 The figure is a schematic diagram of the optical effect of a lens module of AR glasses in the prior art.

[0043] like Figure 1 As shown, the lens module of the AR glasses includes an optical waveguide component and a first cover plate and a second cover plate located on both sides of the optical waveguide component, and the first cover plate and / or the second cover plate are glass cover plates. Furthermore, when assembling the AR glasses, a near-eye lens (refractive lens or plano lens) is used on the near-eye side of the optical waveguide lens, wherein the far-eye side of the near-eye lens is often provided with a front-side coating with an anti-blue light function or other anti-blue light structure.

[0044] However, when the near-eye lens is matched with the optical waveguide component, there will be mutual reflection between the near-eye lens and the optical waveguide component. This results in unclear viewing of the real world and poor user experience when using AR glasses. In addition, the multi-layer structure in the lens module causes the ambient light entering from the outside to be lost after multiple interface reflections, especially the reflection degree of the side of the optical waveguide component that forms the grating structure is high, resulting in low overall light transmittance of the lens module and insufficient clarity of the glasses.

[0045] For details, see Figure 1 As shown in the optical effect, the external light incident on the AR glasses lens module will reach the first cover plate, the optical waveguide component, the second cover plate and the near eye lens in sequence, and the external light may contain some blue light. Therefore, when the external light is incident on the far eye side of the near eye lens, the front coating or other anti-blue light structure will reflect the blue light contained in the external light, and the reflected blue light will propagate toward the direction of the optical waveguide component and will be reflected twice by the grating on the optical waveguide lens, thereby forming double images, ghost images or rainbow patterns seen by the user. Specifically, when the distance between the near eye lens component and the optical waveguide component is 0.01-10mm, the phenomenon of double images or ghost images caused by the secondary reflection will be more obvious.

[0046] In order to solve the above-mentioned technical problems, the present application proposes a lens module and AR glasses. Some implementation methods of the present application are described in detail below in conjunction with the accompanying drawings. In the absence of conflict, the following embodiments and features in the embodiments can be combined with each other.

[0047] See also Figure 2 and Figure 3 , Figure 2 This is a schematic structural diagram of a first implementation of a lens module 10 provided in an embodiment of the present application. Figure 3 This is a schematic structural diagram of a second implementation of a lens module 10 provided in one embodiment of the present application.

[0048] like Figure 2 and Figure 3As shown, the embodiment of the present application provides a lens module 10 of AR glasses 1, and the lens module 10 includes an optical waveguide component 11, a first coating layer 12, and a near-eye lens component 13. It should be noted that the lens module 10 has a near-eye side and a far-eye side relative to each other in the thickness direction, wherein the near-eye side refers to the side of the lens module 10 close to the user's eye when the lens module 10 is installed on the AR glasses 1 and the user wears the AR glasses 1, and conversely, the far-eye side refers to the side of the lens module 10 away from the user's eye.

[0049] Specifically, the optical waveguide component 11 at least includes an optical waveguide lens 111, and the optical waveguide lens 111 also has a near-eye side and a far-eye side opposite to each other in the thickness direction, and the optical waveguide lens 111 is formed with a grating structure 1111 on at least one side of the near-eye side and the far-eye side. The first coating layer 12 is disposed on the far-eye side of the optical waveguide component 11; the near-eye lens component 13 at least includes an optical lens 131, and the optical lens 131 is disposed on the near-eye side of the optical waveguide component 11.

[0050] The optical lens 131 includes but is not limited to at least one of a refractive lens and a plano lens, and the refractive lens is, for example, a myopia lens or a hyperopia lens.

[0051] Specifically, the first coating layer 12 at least forms a blue light protection structure, such as a blue light protection coating.

[0052] The function of the grating structure 1111 is explained as follows: In some examples, the grating structure 1111 includes an input grating and an output grating, that is, the input grating and the output grating are arranged on the same side of the optical waveguide lens 111, and the optical waveguide component 11 is configured to transmit the light input from the input grating to the output grating and output it. In the AR glasses, the optical machine module of the AR glasses is arranged corresponding to the input grating and is used to output the optical signal to the input grating, and the optical waveguide lens 111 transmits the optical signal input from the input grating to the output grating and outputs it, so that the optical signal output by the optical machine module 30 enters the user's field of view.

[0053] It should be noted that the optical waveguide lens 111 has a first surface 115 corresponding to the far eye side and a second surface 116 corresponding to the near eye side. The coupling-in grating and / or the coupling-out grating may be as follows: Figure 2 The first surface 115 formed on the far eye side of the optical waveguide lens 111 as shown in FIG. 1 may also be as shown in FIG. Figure 3 As shown, the second surface 116 is formed on the near-eye side of the optical waveguide lens 111. It should be understood that when the coupling-in grating is disposed on the first surface 115, the coupling-in grating is a reflective grating, and when the coupling-in grating is disposed on the second surface 116, the coupling-in grating is a transmissive grating; the same is true for the coupling-out grating.

[0054] See also Figure 1 , Figure 2 and Figure 3 It can be seen that the lens module 10 provided in the embodiment of the present application is different from the existing lens structure design ( Figure 1 ), by moving the first coating layer 12 originally located on the near-eye side of the optical waveguide component 11 to the far-eye side of the optical waveguide component 11, the mutual reflection between the near-eye lens and the optical waveguide lens 111 is avoided.

[0055] Specifically, for Figure 2 , Figure 3 As for the lens module 10 shown, the external light incident on the lens module 10 may contain part of blue light, which will be reflected by the first coating layer 12, and the other light except the blue light in the external light will pass through the first coating layer 12, the optical waveguide component 11 and the near-eye lens component 13 in sequence to enter the user's field of view for imaging. However, since the blue light in the external light has been reflected by the first coating layer 12, there will be no double images, ghost images or rainbow patterns.

[0056] Therefore, the lens module 10 provided in the embodiment of the present application eliminates the formation of interfering images such as double images and ghost images while maintaining the anti-blue light effect of the original front-side coating, and improves the overall light transmittance of the lens module 10, thereby improving the clarity and user experience of the user using the AR glasses 1 to view the real world.

[0057] See also Figure 4 and Figure 5 , Figure 4 This is a schematic structural diagram of a third implementation of a lens module provided in an embodiment of the present application. Figure 5 This is a schematic structural diagram of a fourth implementation of a lens module provided in one embodiment of the present application.

[0058] like Figure 4 and Figure 5 As shown, in some embodiments, the optical waveguide assembly 11 further includes a protective member 112 , and the protective member 112 is disposed at least on one side of the optical waveguide lens 111 forming the grating mechanism.

[0059] Specifically, the protective member 112 is a light-transmissive protective component to ensure that light entering from the outside of the AR glasses 1 can pass through the protective member 112, and the protective member 112 at least covers the grating structure 1111 for protection. It should be understood that the grating structure 1111 is a fine structure, and when the grating structure 1111 is worn, the optical properties of the grating will be damaged. Therefore, the provision of the protective member 112 can improve the durability of the lens module 10.

[0060] like Figure 4 and Figure 5As shown, in some embodiments, the protection member 112 covers the entire surface of the first surface 115 and / or the second surface 116 of the optical waveguide lens 111 to enhance the protection effect of the protection member 112 on the entire optical waveguide lens 111 and the grating structure 1111 .

[0061] like Figure 4 As shown, in some embodiments, the grating structure 1111 is a reflective grating, and the grating structure 1111 is formed on one side of the optical waveguide lens 111 close to the first coating layer 12;

[0062] The protection member 112 at least includes a first cover plate 1121 . The first cover plate 1121 is disposed between the optical waveguide lens 111 and the first coating layer 12 .

[0063] Exemplarily, the first cover plate 1121 is a light-transmitting cover plate, such as a glass cover plate, so that light incident from the outside of the AR glasses 1 can pass through the first coating layer 12, the first cover plate 1121, the light waveguide lens 111 and the near-eye lens assembly 13 in sequence to reach the user's eyes for imaging while protecting the light waveguide lens 111.

[0064] Preferably, the first cover plate 1121 covers the entire surface of the first surface 115 and / or the second surface 116 of the optical waveguide lens 111 to enhance the protective effect of the first cover plate 1121 on the entire optical waveguide lens 111 and the grating structure 1111 .

[0065] Preferably, when the first coating layer 12 is provided, the first coating layer 12 can be attached to a surface of the first cover plate 1121 away from the optical waveguide lens 111 (ie, the first surface 115 ) to shorten the thickness of the lens module 10 and make the lens module 10 thinner and more compact.

[0066] It should be understood that the positional relationship between the first cover plate 1121 and the optical waveguide lens 111 can be, in addition to being as described in the above embodiment: disposing the first cover plate 1121 between the optical waveguide lens 111 and the first coating layer 12, also be that the first coating layer 12 is disposed between the optical waveguide lens 111 and the first cover plate 1121, that is, it is necessary to ensure that at least the first cover plate 1121 is disposed on the side of the optical waveguide lens 111 that forms the grating structure.

[0067] In some embodiments, a first anti-reflection layer 1123 is disposed on at least one side of the first cover plate 1121 in the thickness direction, and the first anti-reflection layer 1123 is disposed in close contact with the first cover plate 1121 .

[0068] Exemplarily, the first anti-reflection layer 1123 is an anti-reflection film, and the anti-reflection film may be coated on at least one side of the first cover plate 1121 in the thickness direction.

[0069] That is, the first anti-reflection layer 1123 may be disposed on the near-eye side of the first cover plate 1121, or may be disposed on the far-eye side of the first cover plate 1121, or may be disposed on the near-eye side of the first cover plate 1121. Figure 4 As shown, the two parts are generally arranged on both sides of the first cover plate 1121 in the thickness direction.

[0070] It should be noted that when the first anti-reflection layer 1123 is arranged on the side of the first cover plate 1121 away from the optical waveguide lens 111, the transmittance of the light entering the first cover plate 1121 from the far eye side of the lens module 10 increases; when the first anti-reflection layer 1123 is arranged on the side of the first cover plate 1121 close to the optical waveguide lens 111, the transmittance of the light emitted from the first cover plate 1121 to the optical waveguide lens 111 increases; when the first anti-reflection layer 1123 is simultaneously arranged on the side of the first cover plate 1121 away from the optical waveguide lens 111 and the side close to the optical waveguide lens 111, the transmittance of the light entering the first cover plate 1121 from the far eye side of the lens module 10 and the transmittance of the light emitted from the first cover plate 1121 to the optical waveguide lens 111 both increase.

[0071] In some embodiments, the distance between the protection member 112 and the first anti-reflection layer 1123 ranges from 0.01 mm to 10 mm.

[0072] It should be noted that when a first anti-reflection layer 1123 is disposed on the side of the first cover plate 1121 close to the optical waveguide lens 111 , the distance between the protection member 112 and the first anti-reflection layer 1123 refers to the distance between the first anti-reflection layers 1123 and the first anti-reflection layers 1123 .

[0073] When the first cover plate 1121 close to the optical waveguide lens 111 is not provided with the first anti-reflection layer 1123 , the distance between the protection member 112 and the first anti-reflection layer 1123 refers to the distance between the first cover plate 1121 and the first anti-reflection layer 1123 .

[0074] like Figure 5 As shown, in some embodiments, the grating structure 1111 is a transmissive grating, and the grating structure 1111 is formed on a side of the optical waveguide lens 111 close to the near-eye lens assembly 13;

[0075] The protection member 112 at least includes a second cover plate 1122 , and the second cover plate 1122 is disposed between the optical waveguide lens 111 and the near-eye lens assembly 13 .

[0076] Exemplarily, the second cover plate 1122 is a light-transmitting cover plate, such as a glass cover plate, so that light incident from the outside of the AR glasses 1 can pass through the first coating layer 12, the light waveguide lens 111, the second cover plate 1122 and the near-eye lens assembly 13 in sequence to reach the user's eyes for imaging while protecting the light waveguide lens 111.

[0077] Preferably, the second cover plate 1122 covers the entire first surface 115 and / or the second surface 116 of the optical waveguide lens 111 , so as to enhance the protective effect of the second cover plate 1122 on the entire optical waveguide lens 111 and the grating structure 1111 .

[0078] In some embodiments, a second anti-reflection layer 1124 is disposed on at least one side of the second cover plate 1122 in the thickness direction, and the second anti-reflection layer 1124 is disposed in close contact with the second cover plate 1122 .

[0079] Exemplarily, the second anti-reflection layer 1124 is an anti-reflection film, and the anti-reflection film may be coated on at least one side of the second cover plate 1122 in the thickness direction.

[0080] That is, the second anti-reflection layer 1124 can be disposed on the near-eye side of the first cover plate 1121, or on the far-eye side of the first cover plate 1121, or can be disposed on the near-eye side of the first cover plate 1121. Figure 5 As shown, the two parts are generally arranged on both sides of the first cover plate 1121 in the thickness direction.

[0081] It should be noted that when the second anti-reflection layer 1124 is arranged on the side of the second cover plate 1122 away from the optical waveguide lens 111, the transmittance of the light when it is emitted from the near-eye side of the second cover plate 1122 increases; when the second anti-reflection layer 1124 is arranged on the side of the second cover plate 1122 close to the optical waveguide lens 111, the transmittance of the light when it is emitted from the optical waveguide lens 111 to the second cover plate 1122 increases; when the first anti-reflection layer 1123 is simultaneously arranged on the side of the second cover plate 1122 away from the optical waveguide lens 111 and the side close to the optical waveguide lens 111, the transmittance of the light when it is emitted from the near-eye side of the second cover plate 1122 increases, and the transmittance of the light when it is emitted from the optical waveguide lens 111 to the second cover plate 1122 increases.

[0082] In some embodiments, the distance between the light guide lens 111 and the second cover plate 1122 ranges from 0.01 mm to 10 mm.

[0083] It should be noted that when the second cover plate 1122 is provided with a second anti-reflection layer 1124 on the side close to the optical waveguide lens 111 , the distance between the optical waveguide lens 111 and the second cover plate 1122 refers to the distance between the second cover plate 1122 and the second anti-reflection layer 1124 .

[0084] It should also be noted that the setting of the protective member can be combined with the description of the above embodiment and the following Figure 4 and Figure 5 The solution shown is that a first cover plate and a second cover plate are respectively arranged on two opposite sides in the thickness direction of the optical waveguide lens.

[0085] See also Figure 6 , Figure 6 This is a schematic structural diagram of a fifth implementation manner of a lens module provided in one embodiment of the present application.

[0086] like Figure 6 As shown, in some embodiments, the grating structure 1111 includes an in-coupling grating and an out-coupling grating, and the in-coupling grating and the out-coupling grating are formed on opposite sides of the optical waveguide lens 111;

[0087] The protection member 112 includes a first cover plate 1121 and a second cover plate 1122 . The first cover plate 1121 is disposed between the optical waveguide lens 111 and the first coating layer 12 , and the second cover plate 1122 is disposed between the optical waveguide lens 111 and the near-eye lens assembly 13 .

[0088] It should be noted that the configuration of the first cover plate 1121 and the second cover plate 1122 in the embodiment of the present application is the same as the specific scheme in the above embodiment, and the above embodiment can be combined with the above embodiment. Figure 4 and Figure 5 The solution shown is a specific solution in which a first cover plate 1121 and a second cover plate 1122 are respectively disposed on two opposite sides of the optical waveguide lens 111 in the thickness direction.

[0089] It should be understood that the first cover plate 1121 is arranged between the optical waveguide lens 111 and the first coating layer 12, in order to protect the coupling-in grating and / or the coupling-out grating formed on the surface of the optical waveguide lens 111 close to the first coating layer 12, and the second cover plate 1122 is arranged between the optical waveguide lens 111 and the near-eye lens assembly 13, in order to protect the coupling-in grating and / or the coupling-out grating formed on the surface of the optical waveguide lens 111 close to the near-eye layer.

[0090] See also Figure 7 , Figure 7 This is a schematic structural diagram of a sixth implementation of a lens module provided in one embodiment of the present application.

[0091] like Figure 7 As shown, in some embodiments, the protection member 112 includes a composite layer 15 covering one side of the optical waveguide lens 111 forming the grating structure 1111, and the composite layer 15 and the surface of the grating structure 1111 are adapted to each other;

[0092] The composite layer 15 at least includes a protective coating and an anti-reflection coating.

[0093] Specifically, the protective coating is arranged on the side of the optical waveguide lens 111 where the grating structure 1111 is formed and is located on the near-eye side of the first coating layer 12, and is at least used to protect the grating structure 1111; and the anti-reflection coating is arranged on the side of the protective coating away from the optical waveguide lens 111, and is used to perform anti-reflection treatment on the external light incident on the lens module 10.

[0094] For example, when the composite layer 15 is provided, the protective coating and the anti-reflection coating may be sequentially added to the surface of one side of the optical waveguide lens 111 forming the grating structure 1111, so as to ensure that the provided composite layer 15 and the surface of the grating structure 1111 are adapted to each other, so that the composite layer 15 achieves a better light transmission effect. Preferably, the refractive index of the composite layer 15 is between 1.2 and 1.8.

[0095] For example, the protective coating in the composite layer 15 includes an anti-wear film layer and an anti-fouling film layer disposed on the surface of the optical waveguide lens 111 forming the grating structure 1111 , wherein the protective coating, the anti-wear film layer and the anti-fouling film layer can all be polymer coatings.

[0096] Compared to Figures 2 to 6 In the method of using the first cover plate 1121 and / or the second cover plate 1122, this embodiment uses the composite layer 15 as the protective member 112, which further improves the light transmittance of the protective member 112 and avoids the reflection effect of the first cover plate 1121 made of glass, for example, on the external incident light.

[0097] like Figure 3 and Figure 4 As shown, in some embodiments, the near-eye lens assembly 13 further includes a second coating layer 14 disposed on a side of the optical lens 131 away from the optical waveguide assembly 11 .

[0098] Exemplarily, the second coating layer 14 can be laminated to the surface of the optical lens 131 close to the near-eye side, or can be spaced apart from the optical lens 131 and located on the side of the optical lens 131 away from the optical waveguide component 11, so as to protect the surface of the optical lens 131 close to the near-eye side, prevent the optical lens 131 from being scratched and damaged, and improve the durability of the optical lens 131.

[0099] like Figures 1 to 7 As shown, in some embodiments, the distance between the near-eye lens assembly 13 and the optical waveguide assembly 11 is 0.01-10 mm.

[0100] It should be noted that, for example, Figure 1 In the lens design shown, when the distance between the near-eye lens assembly 13 and the optical waveguide assembly 11 is 0.01-10 mm, obvious ghosting or double images will be generated due to mutual reflection between the near-eye lens and the optical waveguide lens 111. Increasing the distance between the near-eye lens assembly 13 and the optical waveguide assembly 11 can alleviate the imaging effect of double images or ghost images to a certain extent, but it will lead to a larger thickness of the lens module 10, which is not convenient for limiting the volume of the AR glasses 1.

[0101] Based on this, the distance between the near-eye lens assembly 13 and the optical waveguide assembly 11 is limited to the range of 0.01-10 mm, and by moving the first coating layer 12 originally located on the near-eye side of the optical waveguide assembly 11 to the far-eye side of the optical waveguide assembly 11, it is possible to eliminate double or ghost images while ensuring the volume compression of the lens module 10, and also maintain the original blue light protection effect.

[0102] See also Figure 8 , Figure 8 This is a structural schematic diagram of a seventh implementation manner of a lens module provided in one embodiment of the present application.

[0103] like Figure 8 As shown, in some embodiments, the optical waveguide component 11 further includes a first anti-reflection member 113, and a side surface of the optical waveguide lens 111 forming a grating structure 1111 has a first target area 1151 and a second target area 1152, the grating structure 1111 is located in the first target area 1151, and the first anti-reflection member 113 covers the second target area 1152;

[0104] And / or, the optical waveguide lens 111 further includes a second anti-reflection member 114 , and the second anti-reflection member 114 covers a surface of a side of the optical waveguide lens 111 where the grating structure 1111 is not formed.

[0105] Specifically, a side surface of the optical waveguide lens 111 on which the grating structure 1111 is formed is the first surface 115 , and a side surface of the optical waveguide lens 111 on which the grating structure 1111 is not formed is the second surface 116 .

[0106] It should be understood that only one of the first anti-reflection element 113 and the second anti-reflection element 114 may be disposed on the corresponding surface of the optical waveguide lens 111, or Figure 8 As shown, they are respectively arranged on both side surfaces of the optical waveguide lens 111 .

[0107] It should also be noted that the first anti-reflection layer 1123 is used to improve the light transmittance of the second target area 1152, so that the light loss generated when the light incident from the outside of the AR glasses 1 enters the optical waveguide lens 111 from the surface of the second target area 1152 is reduced.

[0108] Exemplarily, the first anti-reflection layer 1123 and the second anti-reflection layer 1124 are anti-reflection films (anti-reflection films are also called anti-reflection coatings), and the first anti-reflection layer 1123 may be covered on the second target area 1152 of the optical waveguide lens 111 by coating. For example, when coating the surface of the optical waveguide lens 111, in order to coat the second target area 1152 on the surface of the optical waveguide lens 111 with the anti-reflection film and to prevent the first target area 1151 formed with the grating structure 1111 from being coated with the anti-reflection film, the surface of the optical waveguide lens 111 may be coated by shielding (i.e., using a jig to shield the first target area 1151 during the coating operation to prevent the anti-reflection film from being coated on the first target area 1151).

[0109] The effect of the anti-reflection film is that within the visible light range, for incident light entering the anti-reflection film at an incident angle of 0 to 30 degrees, the reflectivity is less than 5%.

[0110] It should be understood that, taking the first anti-reflection layer 1123 as an anti-reflection film as an example, since the grating structure 1111 is specifically a structure formed by the concave and convex portions of the optical waveguide lens 111, if the anti-reflection film is covered on the surface of the grating structure 1111, the thickness of the anti-reflection film is uneven, and the anti-reflection film will affect the optical properties of the grating structure 1111. Therefore, the lens module 10 provided in the present application sets the first anti-reflection layer 1123 to cover a range limited to within the second target area 1152, and does not cover the first target area 1151.

[0111] In some embodiments, the first coating layer 12 includes at least one of an anti-fouling film, an anti-blue light film, an anti-wear film, and an anti-reflection film.

[0112] It should be understood that the anti-fouling film is used to prevent water vapor and dust from polluting the lens module 10, the anti-blue light film is used to reflect the blue light portion of the incident light entering the lens module 10 from the outside of the AR glasses 1, the anti-wear film is used to avoid wear caused by external scratches, and the anti-reflection film is used to increase the transmittance of external incident light and reduce the reflectivity. Its effect is that within the visible light range, for incident light entering the anti-reflection film with an incident angle of 0 to 30 degrees, the reflectivity is less than 5%.

[0113] It should be noted that the first coating layer 12 can be a single film layer setting of an anti-fouling film, an anti-blue light film, an anti-wear film or an anti-reflection film, and also realize the corresponding functions of the above single film layer; it can also be a combination of two, three or more of the above multiple film layers to compositely realize the functions of multiple film layers.

[0114] See also Fig. 9 , Fig. 9 This is a structural schematic diagram of a seventh implementation manner of a lens module provided in one embodiment of the present application.

[0115] like Fig. 9As shown, in some embodiments, a colloid 16 is provided at the edge of the lens module 10, and the colloid 16 is used to fix the edge of the optical waveguide component 11 and the protective member 112 to each other, or to fix the edge of the optical waveguide component 11 and the near-eye lens component 13 to each other. In addition to the fixing function, the colloid 16 is provided at the edge of the lens module 10 to ensure that the distance between the optical waveguide component 11 and the protective member 112 and / or between the optical waveguide component 11 and the near-eye lens component 13 can be maintained within the distance range recorded in the specification of the present application, while also preventing external water vapor, dust, etc. from entering between the optical waveguide component 11 and the protective member 112 and / or between the optical waveguide component 11 and the near-eye lens component 13.

[0116] See also Fig.10 and Fig.11 , Fig.10 This is a structural schematic diagram of a first implementation of a lens module provided by another embodiment of the present application, Fig.11 This is a schematic structural diagram of a second implementation of a lens module provided in another embodiment of the present application.

[0117] like Fig.10 and Fig.11 As shown, the embodiment of the present application also provides another lens module 10 of AR glasses 1, and the lens module 10 includes an optical waveguide component 11 and a near-eye lens component 13. It should be noted that the lens module 10 has a near-eye side and a far-eye side relative to each other in the thickness direction, wherein the near-eye side refers to the side of the lens module 10 close to the user's eye when the lens module 10 is installed on the AR glasses 1 and the user wears the AR glasses 1, and conversely, the far-eye side refers to the side of the lens module 10 away from the user's eye.

[0118] Specifically, the optical waveguide component 11 at least includes an optical waveguide lens 111, and the optical waveguide lens 111 also has a near-eye side and a far-eye side opposite to each other in the thickness direction, and the optical waveguide lens 111 is formed with a grating structure 1111 on at least one side of the near-eye side and the far-eye side. The near-eye lens component 13 at least includes an optical lens 131, and the optical lens 131 is disposed on the near-eye side of the optical waveguide component 11, and the distance between the optical lens 131 and the optical waveguide component 11 is 0.01-10 mm;

[0119] Among them, no anti-blue light structure is set between the optical waveguide component 11 and the optical lens 131.

[0120] It should be noted that the anti-blue light structure refers to a structure that reflects blue light, that is, when the light directed toward the anti-blue light structure contains some blue light, this part of the blue light will be reflected by the anti-blue light structure. For example, the anti-blue light structure can be a film layer with anti-blue light function. A specific example is the near-eye lens in the first lens module 10 provided in the embodiment of the present application, which is an example of an anti-blue light structure.

[0121] It should be noted that when external light is projected onto the far eye side of the near eye lens, the front coating or other anti-blue light structures will reflect the blue light contained in the external light, and the reflected blue light will propagate toward the direction of the optical waveguide lens 111 and will be reflected secondary by the grating on the optical waveguide lens 111, thereby forming double images, ghost images or rainbow patterns seen by the user. Specifically, when the distance between the near eye lens assembly 13 and the optical waveguide assembly 11 is 0.01-10 mm, the phenomenon of double images or ghost images caused by the secondary reflection will be more obvious.

[0122] Based on this, the distance between the near-eye lens component 13 and the optical waveguide component 11 is limited to the range of 0.01-10mm, and by removing the first coating layer 12 originally located on the near-eye side of the optical waveguide component 11, it is possible to eliminate double or ghost images while ensuring the volume compression of the lens module 10, and also maintain the original blue light protection effect.

[0123] It should also be pointed out that no anti-blue light structure is provided between the optical waveguide component 11 and the optical lens 131, which is also one of the prerequisites for setting the distance between the optical lens 131 and the optical waveguide component 11 to 0.01-10 mm. By removing the anti-blue light structure, the distance between the optical lens 131 and the optical waveguide component 11 can be effectively shortened, thereby reducing the process difficulty.

[0124] It should be noted that the optical waveguide lens 111 has a first surface 115 corresponding to the far eye side and a second surface 116 corresponding to the near eye side. The coupling-in grating and / or the coupling-out grating may be as follows: Figure 8 The first surface 115 formed on the far eye side of the optical waveguide lens 111 as shown in FIG. 1 may also be as shown in FIG. Fig. 9 As shown, the second surface 116 is formed on the near-eye side of the optical waveguide lens 111. It should be understood that when the coupling-in grating is disposed on the first surface 115, the coupling-in grating is a reflective grating, and when the coupling-in grating is disposed on the second surface 116, the coupling-in grating is a transmissive grating; the same is true for the coupling-out grating.

[0125] See Figure 1 In the lens structure shown, when the near-eye lens and the light guide lens 111 are matched, there will be a mutual reflection phenomenon between the near-eye lens and the light guide lens 111, which has been specifically described in the above records and will not be repeated here.

[0126] As for Fig.10 , Fig.11As for the lens module 10 shown, by directly removing the anti-blue light structure from the optical waveguide component 11 to the near-eye lens component 13, the mutual reflection between the near-eye lens and the optical waveguide lens 111 is avoided, the formation of interfering images such as double images and ghost images is eliminated, and the overall light transmittance of the lens module 10 is improved, thereby improving the clarity and user experience of the user using the AR glasses 1 to view the real world.

[0127] like Figures 2 to 9 As shown, in some embodiments, the lens module 10 further includes a first coating layer 12, and the first coating layer 12 is disposed on the far eye side of the optical waveguide component 11;

[0128] The first coating layer 12 includes at least one of an anti-fouling film, an anti-blue light film, an anti-wear film and an anti-reflection film.

[0129] Specifically, the anti-fouling film is used to prevent water vapor and dust from polluting the lens module 10, the anti-blue light film is used to reflect the blue light portion of the incident light entering the lens module 10 from the outside of the AR glasses 1, the anti-wear film is used to avoid wear caused by external scratches, and the anti-reflection film is used to increase the transmittance of external incident light and reduce the reflectivity. Its effect is that within the visible light range, for incident light entering the anti-reflection film with an incident angle of 0 to 30 degrees, the reflectivity is less than 5%.

[0130] It should be noted that the first coating layer 12 can be a single film layer setting of an anti-fouling film, an anti-blue light film, an anti-wear film or an anti-reflection film, and also realize the corresponding functions of the above single film layer; it can also be a combination of two, three or more of the above multiple film layers to compositely realize the functions of multiple film layers.

[0131] In some embodiments, the optical waveguide assembly 11 further includes a protective member 112 , and the protective member 112 is disposed at least on one side of the optical waveguide lens 111 where the grating mechanism is formed.

[0132] Specifically, the protective member 112 is a light-transmissive protective component to ensure that light entering from the outside of the AR glasses 1 can pass through the protective member 112, and the protective member 112 at least covers the grating structure 1111 for protection. It should be understood that the grating structure 1111 is a fine structure, and when the grating structure 1111 is worn, the optical properties of the grating will be damaged. Therefore, the provision of the protective member 112 can improve the durability of the lens module 10.

[0133] In some embodiments, the protection member 112 covers the entire first surface 115 and / or the second surface 116 of the optical waveguide lens 111 to enhance the protection effect of the protection member 112 on the entire optical waveguide lens 111 and the grating structure 1111 .

[0134] See also Fig.12 and Fig.13, Fig.12 This is a schematic structural diagram of a third implementation of a lens module provided by another embodiment of the present application. Fig.13 This is a schematic structural diagram of a fourth implementation of a lens module provided in another embodiment of the present application.

[0135] like Fig.12 and Fig.13 As shown, in some embodiments, the grating structure 1111 is a reflective grating, and the grating structure 1111 is formed on the far eye side of the optical waveguide lens 111;

[0136] The protective member 112 at least includes a first cover plate 1121 . The first cover plate 1121 is disposed on the far-eye side of the optical waveguide lens 111 .

[0137] Exemplarily, the first cover plate 1121 is a light-transmitting cover plate, such as a glass cover plate, so that light incident from the outside of the AR glasses 1 can pass through the first cover plate 1121, the light waveguide lens 111 and the near-eye lens assembly 13 in sequence to reach the user's eyes for imaging while protecting the light waveguide lens 111.

[0138] Preferably, the first cover plate 1121 covers the entire surface of the first surface 115 and / or the second surface 116 of the optical waveguide lens 111 to enhance the protective effect of the first cover plate 1121 on the entire optical waveguide lens 111 and the grating structure 1111 .

[0139] In some embodiments, a first anti-reflection layer 1123 is disposed on at least one side of the first cover plate 1121 in the thickness direction, and the first anti-reflection layer 1123 is disposed in close contact with the first cover plate 1121 .

[0140] Exemplarily, the first anti-reflection layer 1123 is an anti-reflection film, and the anti-reflection film may be coated on at least one side of the first cover plate 1121 in the thickness direction.

[0141] That is, the first anti-reflection layer 1123 may be disposed on the near-eye side of the first cover plate 1121, or may be disposed on the far-eye side of the first cover plate 1121, or may be disposed on the near-eye side of the first cover plate 1121. Fig.12 As shown, the two parts are generally arranged on both sides of the first cover plate 1121 in the thickness direction.

[0142] It should be noted that when the first anti-reflection layer 1123 is arranged on the side of the first cover plate 1121 away from the optical waveguide lens 111, the transmittance of the light entering the first cover plate 1121 from the far eye side of the lens module 10 increases; when the first anti-reflection layer 1123 is arranged on the side of the first cover plate 1121 close to the optical waveguide lens 111, the transmittance of the light emitted from the first cover plate 1121 to the optical waveguide lens 111 increases; when the first anti-reflection layer 1123 is simultaneously arranged on the side of the first cover plate 1121 away from the optical waveguide lens 111 and the side close to the optical waveguide lens 111, the transmittance of the light entering the first cover plate 1121 from the far eye side of the lens module 10 and the transmittance of the light emitted from the first cover plate 1121 to the optical waveguide lens 111 both increase.

[0143] In some embodiments, the distance between the protection member 112 and the first anti-reflection layer 1123 ranges from 0.01 mm to 10 mm.

[0144] It should be noted that when a first anti-reflection layer 1123 is disposed on the side of the first cover plate 1121 close to the optical waveguide lens 111 , the distance between the protection member 112 and the first anti-reflection layer 1123 refers to the distance between the first anti-reflection layers 1123 and the first anti-reflection layers 1123 .

[0145] When the first cover plate 1121 close to the optical waveguide lens 111 is not provided with the first anti-reflection layer 1123 , the distance between the protection member 112 and the first anti-reflection layer 1123 refers to the distance between the first cover plate 1121 and the first anti-reflection layer 1123 .

[0146] like Fig.13 As shown, in some embodiments, the grating structure 1111 is a transmissive grating, and the grating structure 1111 is formed on a side of the optical waveguide lens 111 close to the near-eye lens assembly 13;

[0147] The protection member 112 at least includes a second cover plate 1122 , and the second cover plate 1122 is disposed between the optical waveguide lens 111 and the near-eye lens assembly 13 .

[0148] Exemplarily, the second cover plate 1122 is a light-transmitting cover plate, such as a glass cover plate, so that light incident from the outside of the AR glasses 1 can pass through the light waveguide lens 111, the second cover plate 1122 and the near-eye lens assembly 13 in sequence to reach the user's eyes for imaging while protecting the light waveguide lens 111.

[0149] Preferably, the second cover plate 1122 covers the entire first surface 115 and / or the second surface 116 of the optical waveguide lens 111 , so as to enhance the protective effect of the second cover plate 1122 on the entire optical waveguide lens 111 and the grating structure 1111 .

[0150] In some embodiments, a second anti-reflection layer 1124 is disposed on at least one side of the second cover plate 1122 in the thickness direction, and the second anti-reflection layer 1124 is disposed in close contact with the second cover plate 1122 .

[0151] Exemplarily, the second anti-reflection layer 1124 is an anti-reflection film, and the anti-reflection film may be coated on at least one side of the second cover plate 1122 in the thickness direction.

[0152] That is, the second anti-reflection layer 1124 can be disposed on the near-eye side of the first cover plate 1121, or on the far-eye side of the first cover plate 1121, or can be disposed on the near-eye side of the first cover plate 1121. Figure 5 As shown, the two parts are generally arranged on both sides of the first cover plate 1121 in the thickness direction.

[0153] It should be noted that when the second anti-reflection layer 1124 is arranged on the side of the second cover plate 1122 away from the optical waveguide lens 111, the transmittance of the light when it is emitted from the near-eye side of the second cover plate 1122 increases; when the second anti-reflection layer 1124 is arranged on the side of the second cover plate 1122 close to the optical waveguide lens 111, the transmittance of the light when it is emitted from the optical waveguide lens 111 to the second cover plate 1122 increases; when the first anti-reflection layer 1123 is simultaneously arranged on the side of the second cover plate 1122 away from the optical waveguide lens 111 and the side close to the optical waveguide lens 111, the transmittance of the light when it is emitted from the near-eye side of the second cover plate 1122 increases, and the transmittance of the light when it is emitted from the optical waveguide lens 111 to the second cover plate 1122 increases.

[0154] In some embodiments, the distance between the light guide lens 111 and the second cover plate 1122 ranges from 0.01 mm to 10 mm.

[0155] It should be noted that when the second cover plate 1122 is provided with a second anti-reflection layer 1124 on the side close to the optical waveguide lens 111 , the distance between the optical waveguide lens 111 and the second cover plate 1122 refers to the distance between the second cover plate 1122 and the second anti-reflection layer 1124 .

[0156] It should also be noted that the setting of the protective member can be combined with the description of the above embodiment and the following Figure 4 and Figure 5 The solution shown is that a first cover plate and a second cover plate are respectively arranged on two opposite sides in the thickness direction of the optical waveguide lens.

[0157] See also Fig.14 , Fig.14 This is a schematic structural diagram of a fifth implementation of a lens module provided in another embodiment of the present application.

[0158] like Fig.14As shown, in some embodiments, the grating structure 1111 includes an in-coupling grating and an out-coupling grating, and the in-coupling grating and the out-coupling grating are formed on opposite sides of the optical waveguide lens 111;

[0159] The protective member 112 includes a first cover plate 1121 and a second cover plate 1122 . The first cover plate 1121 is disposed on the far-eye side of the optical waveguide lens 111 , and the second cover plate 1122 is disposed between the optical waveguide lens 111 and the near-eye lens assembly 13 .

[0160] It should be noted that the configuration of the first cover plate 1121 and the second cover plate 1122 in the embodiment of the present application is the same as the specific scheme in the above embodiment, and the above embodiment can be combined with the above embodiment. Figure 4 and Figure 5 The solution shown is a specific solution in which a first cover plate 1121 and a second cover plate 1122 are respectively disposed on two opposite sides of the optical waveguide lens 111 in the thickness direction.

[0161] It should be understood that the first cover plate 1121 is provided on the far-eye side of the optical waveguide lens 111 to protect the coupling-in grating and / or the coupling-out grating formed on the far-eye side surface of the optical waveguide lens 111, and the second cover plate 1122 is provided between the optical waveguide lens 111 and the near-eye lens assembly 13 to protect the coupling-in grating and / or the coupling-out grating formed on the surface of the optical waveguide lens 111 close to the near-eye layer.

[0162] See also Fig.15 , Fig.15 This is a schematic structural diagram of a sixth implementation of a lens module provided in another embodiment of the present application.

[0163] like Fig.15 As shown, in some embodiments, the protection member 112 includes a composite layer 15 covering one side of the optical waveguide lens 111 forming the grating structure 1111, and the composite layer 15 and the surface of the grating structure 1111 are adapted to each other;

[0164] The composite layer 15 at least includes a protective coating and an anti-reflection coating.

[0165] Specifically, the protective coating is arranged on the side of the optical waveguide lens 111 forming the grating structure 1111, and is at least used to protect the grating structure 1111; and the anti-reflection coating is arranged on the side of the protective coating away from the optical waveguide lens 111, and is used to perform anti-reflection treatment on the external light incident on the lens module 10.

[0166] For example, when the composite layer 15 is provided, the protective coating and the anti-reflection coating may be sequentially added to the surface of one side of the optical waveguide lens 111 forming the grating structure 1111, so as to ensure that the provided composite layer 15 and the surface of the grating structure 1111 are adapted to each other, so that the composite layer 15 achieves a better light transmission effect. Preferably, the refractive index of the composite layer 15 is between 1.2 and 1.8.

[0167] For example, the protective coating in the composite layer 15 includes an anti-wear film layer and an anti-fouling film layer disposed on the surface of the optical waveguide lens 111 forming the grating structure 1111 , wherein the protective coating, the anti-wear film layer and the anti-fouling film layer can all be polymer coatings.

[0168] Compared to Figures 10 to 14 In the method of using the first cover plate 1121 and / or the second cover plate 1122, this embodiment uses the composite layer 15 as the protective member 112, which further improves the light transmittance of the protective member 112 and avoids the reflection effect of the first cover plate 1121 made of glass, for example, on the external incident light.

[0169] like Fig.12 and Fig.13 As shown, in some embodiments, the near-eye lens assembly 13 further includes a second coating layer 14 disposed on a side of the optical lens 131 away from the optical waveguide assembly 11 .

[0170] Exemplarily, the second coating layer 14 can be laminated to the surface of the optical lens 131 close to the near-eye side, or can be spaced apart from the optical lens 131 and located on the side of the optical lens 131 away from the optical waveguide component 11, so as to protect the surface of the optical lens 131 close to the near-eye side, prevent the optical lens 131 from being scratched and damaged, and improve the durability of the optical lens 131.

[0171] like Figures 10 to 14 As shown, in some embodiments, the distance between the near-eye lens assembly 13 and the optical waveguide assembly 11 is 0.01-10 mm.

[0172] It should be noted that, for example, Figure 1 In the lens design shown, when the distance between the near-eye lens assembly 13 and the optical waveguide assembly 11 is 0.01-10 mm, obvious ghosting or double images will be generated due to mutual reflection between the near-eye lens and the optical waveguide lens 111. Increasing the distance between the near-eye lens assembly 13 and the optical waveguide assembly 11 can alleviate the imaging effect of double images or ghost images to a certain extent, but it will lead to a larger thickness of the lens module 10, which is not convenient for limiting the volume of the AR glasses 1.

[0173] Based on this, the distance between the near-eye lens assembly 13 and the optical waveguide assembly 11 is limited to the range of 0.01-10 mm, and by removing the first coating layer 12 originally located on the near-eye side of the optical waveguide assembly 11, the double or ghost image phenomenon can be eliminated while ensuring the volume compression of the lens module 10.

[0174] See also Fig.16 , Fig.16 This is a schematic structural diagram of a seventh implementation manner of a lens module provided in another embodiment of the present application.

[0175] like Fig.16 As shown, in some embodiments, the optical waveguide component 11 further includes a first anti-reflection member 113, and a side surface of the optical waveguide lens 111 forming a grating structure 1111 has a first target area 1151 and a second target area 1152, the grating structure 1111 is located in the first target area 1151, and the first anti-reflection member 113 covers the second target area 1152;

[0176] And / or, the optical waveguide lens 111 further includes a second anti-reflection member 114 , and the second anti-reflection member 114 covers a surface of a side of the optical waveguide lens 111 where the grating structure 1111 is not formed.

[0177] Specifically, a side surface of the optical waveguide lens 111 on which the grating structure 1111 is formed is the first surface 115 , and a side surface of the optical waveguide lens 111 on which the grating structure 1111 is not formed is the second surface 116 .

[0178] It should be understood that only one of the first anti-reflection element 113 and the second anti-reflection element 114 may be disposed on the corresponding surface of the optical waveguide lens 111, or Figure 8 As shown, they are respectively arranged on both side surfaces of the optical waveguide lens 111 .

[0179] It should also be noted that the first anti-reflection layer 1123 is used to improve the light transmittance of the second target area 1152, so that the light loss generated when the light incident from the outside of the AR glasses 1 enters the optical waveguide lens 111 from the surface of the second target area 1152 is reduced.

[0180] Exemplarily, the first anti-reflection layer 1123 and the second anti-reflection layer 1124 are anti-reflection films (anti-reflection films are also called anti-reflection coatings), and the first anti-reflection layer 1123 may be covered on the second target area 1152 of the optical waveguide lens 111 by coating. For example, when coating the surface of the optical waveguide lens 111, in order to coat the second target area 1152 on the surface of the optical waveguide lens 111 with the anti-reflection film and to prevent the first target area 1151 formed with the grating structure 1111 from being coated with the anti-reflection film, the surface of the optical waveguide lens 111 may be coated by shielding (i.e., using a jig to shield the first target area 1151 during the coating operation to prevent the anti-reflection film from being coated on the first target area 1151).

[0181] The effect of the anti-reflection film is that within the visible light range, for incident light entering the anti-reflection film at an incident angle of 0 to 30 degrees, the reflectivity is less than 5%.

[0182] It should be understood that, taking the first anti-reflection layer 1123 as an anti-reflection film as an example, since the grating structure 1111 is specifically a structure formed by the concave and convex portions of the optical waveguide lens 111, if the anti-reflection film is covered on the surface of the grating structure 1111, the thickness of the anti-reflection film is uneven, and the anti-reflection film will affect the optical properties of the grating structure 1111. Therefore, the lens module 10 provided in the present application sets the first anti-reflection layer 1123 to cover a range limited to within the second target area 1152, and does not cover the first target area 1151.

[0183] See also Fig.17 , Fig.17 A schematic diagram of the structure of an AR glasses provided in an embodiment of the present application.

[0184] like Fig.17 As shown, an embodiment of the present application further provides an AR glasses 1, the AR glasses 1 comprising: a lens module 10, a frame module 20 and an optical machine module 30, and the components of the AR glasses 1 are specifically described below.

[0185] Specifically, the frame module 20 includes a frame assembly 21 and a temple assembly 22 connected to the frame assembly 21; the lens module 10 is specifically any one of the lens modules 10 provided in the embodiments of the present application, and the lens module 10 is installed in the frame assembly 21; and the optical machine module 30 is connected to at least one of the frame assembly 21 and the temple assembly 22 and is arranged corresponding to the lens module 10, and the optical machine module 30 is used to output an optical signal to the lens module 10.

[0186] Specifically, the lens module 10 is any one of the lens modules 10 provided in the embodiments of the present application, and the lens module 10 has a relative near-eye side and a far-eye side; the frame module 20 includes a frame assembly 21 and a temple assembly 22, the lens module 10 is installed on the frame assembly 21, and the temple assembly 22 is connected to the frame assembly 21 and extends toward the near-eye side of the lens module 10; the optical machine module 30 is connected to at least one of the frame assembly 21 and the temple assembly 22 and is arranged corresponding to the lens module 10.

[0187] It should be pointed out that Fig.17 What is shown is only a schematic diagram of the structure of one side of the AR glasses 1. The actual AR glasses include structures on both sides that are opposite to each other to meet the user's binocular use needs.

[0188] It should also be added that Fig.17 In the structure of the AR glasses 1 shown, the lens module 10 may be a lens module 10 including an optical waveguide component 11, a first coating layer 12 ( Fig.17 The lens module 10 including the optical waveguide component 11 and the near-eye lens component 13 may also be the lens module 10 including the optical waveguide component 11 and the near-eye lens component 13 provided in the second embodiment of the present application.

[0189] like Fig.17 As shown, in some embodiments, the frame assembly 21 is formed with a front frame portion 211 and temple connecting portions 212 disposed on opposite sides of the front frame portion 211, and the temple assembly 22 is connected to the frame assembly 21 via the temple connecting portions 212;

[0190] For details, please refer to Figures 2 to 17 The lens module 10 is formed with a coupling-in grating area and a coupling-out grating area, and the coupling-out grating area corresponds to the front frame portion 211. The optical machine module 30 is arranged corresponding to the coupling-in grating area and is used to output an optical signal to the coupling-in grating area. The lens module 10 is configured to transmit the optical signal incident to the coupling-in grating area to the coupling-out grating area for output.

[0191] In summary, the embodiments of the present application provide a lens module 10 and AR glasses 1, wherein the lens module 10 provided by one embodiment includes: an optical waveguide component 11, having a near-eye side and a far-eye side relative to each other, the optical waveguide component 11 at least includes an optical waveguide lens 111, and the optical waveguide lens 111 is formed with a grating structure 1111 on at least one side; a first coating layer 12, the first coating layer 12 is arranged on the far-eye side of the optical waveguide component 11; a near-eye lens component 13, the near-eye lens component 13 at least includes an optical lens 131, and the optical lens 131 is arranged on the near-eye side of the optical waveguide component 11.

[0192] A lens module 10 provided in another embodiment includes: an optical waveguide component 11, having a near-eye side and a far-eye side relative to each other, the optical waveguide component 11 at least including an optical waveguide lens 111, and the optical waveguide lens 111 is formed with a grating structure 1111 on at least one side; a near-eye lens component 13, at least including an optical lens 131 arranged on the near-eye side of the optical waveguide component 11, and the distance between the optical lens 131 and the optical waveguide component 11 is 0.01-10mm; wherein, no anti-blue light structure is arranged between the optical waveguide component 11 and the near-eye lens component 13.

[0193] In the embodiment provided in the present application, the first coating layer 12 originally located on the near-eye side of the optical waveguide component 11 is moved to the far-eye side of the optical waveguide component 11, and the formation of interference images such as ghosting and double images is avoided while maintaining the original anti-blue light effect, or the anti-blue light structure from the optical waveguide component 11 to the near-eye lens component 13 is directly removed to avoid the formation of interference images such as ghosting and double images, thereby improving the overall light transmittance of the lens module 10, thereby improving the clarity and usage experience of users using the AR glasses 1 to view the real world.

[0194] It will be appreciated by those skilled in the art that the functional modules / units in the systems and devices disclosed above may be implemented as software, firmware, hardware, and appropriate combinations thereof. In a hardware embodiment, the division between the functional modules / units mentioned in the above description does not necessarily correspond to the division of physical components; for example, a physical component may have multiple functions, or a function or step may be performed by several physical components in cooperation. Some or all physical components may be implemented as software executed by a processor, such as a central processing unit, a digital signal processor, or a microprocessor, or may be implemented as hardware, or may be implemented as a setting circuit, such as a dedicated setting circuit.

[0195] It should be understood that the terms used in this specification of the present application are only for the purpose of describing specific embodiments and are not intended to limit the present application. Unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be internal communication between two elements. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances. As used in the specification of this application and the appended claims, the singular forms of "a", "an", and "the" are intended to include plural forms unless the context clearly indicates otherwise.

[0196] It should also be understood that the term "and / or" used in the specification and the appended claims refers to any combination of one or more of the associated listed items and all possible combinations, including these combinations. In this article, the term "includes", "comprising" or any other variation thereof is intended to cover non-exclusive inclusion, and also includes other elements not explicitly listed, or also includes elements inherent to such process, method, article or system.

Claims

1. A lens module for AR glasses, characterized in that: The lens module comprises: An optical waveguide component has a near-eye side and a far-eye side opposite to each other, wherein the optical waveguide component at least comprises an optical waveguide lens, and the optical waveguide lens has a grating structure formed on at least one side; A first coating layer, the first coating layer being disposed on a far-eye side of the optical waveguide component; The near-eye lens assembly at least comprises an optical lens, and the optical lens is arranged on the near-eye side of the optical waveguide assembly.

2. The lens module according to claim 1, characterized in that: The optical waveguide assembly further comprises a protective member, which is arranged at least on one side of the optical waveguide lens forming the grating mechanism.

3. The lens module according to claim 2, characterized in that: The grating structure is a reflective grating, and the grating structure is formed on a side of the optical waveguide lens close to the first coating layer; The protective member at least includes a first cover plate, and the first cover plate is arranged between the optical waveguide lens and the first coating layer.

4. The lens module according to claim 3, characterized in that: A first anti-reflection layer is disposed on at least one side of the first cover plate in the thickness direction, and the first anti-reflection layer is bonded to the first cover plate.

5. The lens module according to claim 2, characterized in that: The grating structure is a transmission grating, and the grating structure is formed on a side of the optical waveguide lens close to the near-eye lens assembly; The protective member comprises at least a second cover plate, and the second cover plate is arranged between the optical waveguide lens and the near-eye lens assembly.

6. The lens module according to claim 5, characterized in that: A second anti-reflection layer is disposed on at least one side of the second cover plate in the thickness direction, and the second anti-reflection layer is bonded to the second cover plate.

7. The lens module according to claim 2, characterized in that: The grating structure includes an in-coupling grating and an out-coupling grating, and the in-coupling grating and the out-coupling grating are formed on opposite sides of the optical waveguide lens; The protective member includes a first cover plate and a second cover plate, wherein the first cover plate is disposed between the optical waveguide lens and the first coating layer, and the second cover plate is disposed between the optical waveguide lens and the near-eye lens assembly.

8. The lens module according to claim 1, wherein: The protective member comprises a composite layer covering one side of the optical waveguide lens forming the grating structure, and the composite layer and the surface of the grating structure are mutually adapted; Wherein, the composite layer at least includes a protective coating and an anti-reflection coating.

9. The lens module according to any one of claims 1 to 8, characterized in that: The near-eye lens assembly further comprises a second coating layer arranged on a side of the optical lens away from the optical waveguide assembly.

10. The lens module according to any one of claims 1 to 8, characterized in that: The distance between the near-eye lens assembly and the optical waveguide assembly is 0.01-10 mm.

11. The lens module according to any one of claims 1 to 8, characterized in that: The optical waveguide assembly further includes a first anti-reflection member, a surface of the optical waveguide lens on one side of which the grating structure is formed has a first target area and a second target area, the grating structure is located in the first target area, and the first anti-reflection member covers the second target area; And / or, the optical waveguide lens further includes a second anti-reflection member, and the second anti-reflection member covers a side surface of the optical waveguide lens where the grating structure is not formed.

12. The lens module according to any one of claims 1 to 8, characterized in that: The first coating layer includes at least one of an anti-fouling film, an anti-blue light film, an anti-wear film and an anti-reflection film.

13. A lens module for AR glasses, characterized in that: The lens module comprises: An optical waveguide component has a near-eye side and a far-eye side opposite to each other, wherein the optical waveguide component at least comprises an optical waveguide lens, and the optical waveguide lens has a grating structure formed on at least one side; A near-eye lens assembly, comprising at least an optical lens, wherein the optical lens is disposed on the near-eye side of the optical waveguide assembly, and the distance between the optical lens and the optical waveguide assembly is 0.01-10 mm; Wherein, no anti-blue light structure is arranged between the optical waveguide component and the optical lens.

14. The lens module according to claim 13, wherein: The lens module further comprises a first coating layer, which is disposed on the far eye side of the optical waveguide component; Wherein, the first coating layer includes at least one of an anti-fouling film, an anti-blue light film, an anti-wear film and an anti-reflection film.

15. The lens module according to claim 13, wherein: The optical waveguide assembly further comprises a protective member, which is arranged at least on one side of the optical waveguide lens forming the grating mechanism.

16. The lens module according to claim 15, characterized in that: The grating structure is a reflective grating, and the grating structure is formed on the far eye side of the optical waveguide lens; The protective member at least includes a first cover plate, and the first cover plate is arranged on the far eye side of the optical waveguide lens.

17. The lens module according to claim 16, wherein: A first anti-reflection layer is disposed on at least one side of the first cover plate in the thickness direction, and the first anti-reflection layer is bonded to the first cover plate.

18. The lens module according to claim 15, characterized in that: The grating structure is a transmission grating, and the grating structure is formed on a side of the optical waveguide lens close to the near-eye lens assembly; The protective member comprises at least a second cover plate, and the second cover plate is arranged between the optical waveguide lens and the near-eye lens assembly.

19. The lens module according to claim 18, wherein: A second anti-reflection layer is disposed on at least one side of the second cover plate in the thickness direction, and the second anti-reflection layer is bonded to the second cover plate.

20. The lens module according to claim 15, wherein: The grating structure includes an in-coupling grating and an out-coupling grating, and the in-coupling grating and the out-coupling grating are formed on opposite sides of the optical waveguide lens; The protective member includes a first cover plate and a second cover plate, wherein the first cover plate is arranged on the far-eye side of the optical waveguide lens, and the second cover plate is arranged between the optical waveguide lens and the near-eye lens assembly.

21. The lens module according to claim 15, wherein: The protective member comprises a composite layer covering one side of the optical waveguide lens forming the grating structure, and the composite layer and the surface of the grating structure are mutually adapted; Wherein, the composite layer at least includes a protective coating and an anti-reflection coating.

22. The lens module according to any one of claims 13 to 21, characterized in that: The near-eye lens assembly further comprises a second coating layer arranged on a side of the optical lens away from the optical waveguide assembly.

23. The lens module according to any one of claims 13 to 21, characterized in that: The optical waveguide assembly further includes a first anti-reflection member, a surface of the optical waveguide lens on one side of which the grating structure is formed has a first target area and a second target area, the grating structure is located in the first target area, and the first anti-reflection member covers the second target area; And / or, the optical waveguide lens further includes a second anti-reflection member, and the second anti-reflection member covers a side surface of the optical waveguide lens where the grating structure is not formed.

24. An AR glasses, characterized in that: The AR glasses include: A mirror frame module, the mirror frame module comprising a mirror frame assembly and a mirror leg assembly connected to the mirror frame assembly; The lens module according to any one of claims 1 to 23, wherein the lens module is mounted on the frame assembly; An optical-mechanical module is connected to at least one of the frame assembly and the temple assembly and is arranged corresponding to the lens module, and is used to output an optical signal to the lens module.

25. The AR glasses according to claim 24, characterized in that: The frame assembly is formed with a front frame portion and temple connecting portions arranged at two opposite sides of the front frame portion, and the temple assembly is connected to the frame assembly through the temple connecting portions; Among them, the lens module is formed with a coupling-in grating area and a coupling-out grating area, and the coupling-out grating area corresponds to the front frame portion, the optical machine module is arranged corresponding to the coupling-in grating area and is used to output an optical signal to the coupling-in grating area, and the lens module is configured to transmit the optical signal incident to the coupling-in grating area to the coupling-out grating area for output.

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