Lens module and AR glasses

Abstract

The utility model relates to the field of near-to-eye display equipment, and discloses a lens module and AR glasses, the lens module comprises an optical waveguide assembly which at least comprises an optical waveguide lens and a first anti-reflection member, one side surface of the optical waveguide lens is provided with a first target area and a second target area, the optical waveguide lens is provided with a first grating structure in the first target area, and the second target area is provided with a second grating structure in the second target area; the first anti-reflection part is arranged corresponding to the second target area; the first protection assembly is arranged on the side, where the first grating structure is formed, of the optical waveguide lens, and the first anti-reflection part is arranged between the first protection assembly and the optical waveguide lens. According to the lens module and the AR glasses provided by the embodiment of the invention, the partially covered first anti-reflection piece is arranged on the side, where the first grating structure is formed, of the optical waveguide assembly, so that the overall light transmittance of the lens module is improved on the premise that the normal function of the grating structure is ensured; therefore, the definition and the use experience of the user watching the real world by using the AR glasses 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 optical waveguide lenses and upper cover glass and lower cover glass located on both sides of the optical waveguide layer. However, the multi-layer structure in the lens module causes the ambient light entering from the outside to be lost after multiple interface reflections, resulting in low overall transmittance and unclear glasses. As a result, users cannot see the real world clearly when using AR glasses and the user experience is poor. Summary of the invention

[0004] 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.

[0005] In a first aspect, an embodiment of the present application provides a lens module of AR glasses, the lens module comprising:

[0006] The optical waveguide component at least comprises an optical waveguide lens and a first anti-reflection component, wherein a first target area and a second target area are formed on one side surface of the optical waveguide lens, a first grating structure is arranged in the first target area of ​​the optical waveguide lens, and the first anti-reflection component is arranged corresponding to the second target area;

[0007] The first protection component is arranged on a side of the optical waveguide lens where the first grating structure is formed, and the first anti-reflection component is arranged between the first protection component and the optical waveguide lens.

[0008] In some embodiments, the optical waveguide lens has a third target area and a fourth target area formed on a surface of the side away from the first grating structure, the optical waveguide lens is provided with a second grating structure in the third target area, and the optical waveguide component further includes a second anti-reflection element, which is arranged on a side of the optical waveguide lens where the second grating structure is formed corresponding to the fourth target area.

[0009] In some embodiments, the first protection component includes at least a first cover plate, which is disposed on a side of the optical waveguide lens forming the first grating structure and is spaced apart from the optical waveguide component.

[0010] In some embodiments, the first protection assembly further includes a third anti-reflection member, and the third anti-reflection member is disposed on at least one side in the thickness direction of the first cover plate.

[0011] In some embodiments, the first protection component includes a composite layer covering a side of the optical waveguide lens forming the first grating structure, and the composite layer and the surface of the first grating structure are mutually adapted;

[0012] The composite layer at least includes a protective coating and an anti-reflection coating.

[0013] In some embodiments, the lens module further includes a second protection component, which is disposed on a side of the optical waveguide lens away from the first protection component.

[0014] In some embodiments, the second protection component at least includes a second cover plate, and the second cover plate is disposed on a side of the optical waveguide lens away from the first protection component and is spaced apart from the optical waveguide component.

[0015] In some embodiments, the second protection assembly further includes a fourth anti-reflection member, and the fourth anti-reflection member is disposed on at least one side in the thickness direction of the second cover plate.

[0016] In some embodiments, the optical waveguide lens includes an optical waveguide substrate and an embossed adhesive layer, wherein the embossed adhesive layer is disposed on at least one side of the optical waveguide substrate in a thickness direction thereof, and the embossed adhesive layer forms a first grating structure.

[0017] In some embodiments, the lens module has a near-eye side and a far-eye side opposite to each other, and the lens module further comprises a near-eye lens assembly, and the near-eye lens assembly is disposed on the near-eye side of the optical waveguide lens;

[0018] The near-eye lens component is one of a refractive lens and a plano lens.

[0019] In some embodiments, the near-eye lens assembly includes an optical lens and a rear coating, the optical lens is disposed on the near-eye side of the optical waveguide lens and is spaced apart from the optical waveguide assembly, and the rear coating is disposed on the near-eye side of the optical lens;

[0020] The lens module also includes a front coating disposed on the far-eye side of the optical waveguide component and the first protective component, wherein the front coating at least includes an anti-blue light coating.

[0021] In a second aspect, an embodiment of the present application further provides an AR glasses, including:

[0022] As in any lens module provided in the embodiments of the present application, the lens module has a near-eye side and a far-eye side opposite to each other;

[0023] A frame module, the frame module includes a frame assembly and a temple assembly, the lens module is mounted on the frame assembly, and the temple assembly is connected to the frame assembly and extends toward the near-eye side of the lens module;

[0024] An optical machine module, which is connected to at least one of the frame assembly and the temple assembly and is arranged corresponding to the lens module;

[0025] In some embodiments, the AR glasses further include a near-eye lens module, which is disposed on the near-eye side of the lens module and spaced apart from the lens module;

[0026] The near-eye lens component is one of a refractive lens and a plano lens.

[0027] In some embodiments, the first grating structure includes an in-coupling grating and an out-coupling grating;

[0028] Among them, the optical machine module corresponds to the coupling grating setting of the lens module and is used to output the optical signal to the coupling grating. The lens module is configured to transmit the optical signal incident on the coupling grating to the coupling grating output.

[0029] In some embodiments, the optical waveguide lens is formed with a third target area and a fourth target area on a surface of a side away from the first grating structure, the optical waveguide lens is provided with a second grating structure in the third target area, and the optical waveguide assembly further includes a second anti-reflection component, and the second anti-reflection component is provided on a side of the optical waveguide lens where the second grating structure is formed corresponding to the fourth target area;

[0030] Among them, one of the first grating structure and the second grating structure includes a coupling-in grating, and the other includes a coupling-out grating. The optical machine module corresponds to the coupling-in grating setting of the lens module and is used to output an optical signal to the coupling-in grating. The lens module is configured to transmit the optical signal incident on the coupling-in grating to the coupling-out grating output.

[0031] In summary, the embodiments of the present application provide a lens module and AR glasses, the lens module comprising: an optical waveguide component, at least including an optical waveguide lens and a first anti-reflection component, wherein a first target area and a second target area are formed on one side surface of the optical waveguide lens, the optical waveguide lens is provided with a first grating structure in the first target area, and the first anti-reflection component is provided corresponding to the second target area; a first protective component, the first protective component is provided on the side where the optical waveguide lens forms the first grating structure, and the first anti-reflection component is provided between the first protective component and the optical waveguide lens. The lens module and AR glasses provided by the embodiments of the present application ensure that the overall light transmittance of the lens module is improved under the premise that the grating structure functions normally, thereby improving the clarity and use experience of users viewing the real world using AR glasses. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] 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.

[0033] Figure 1 This is a schematic diagram of the optical effect of a lens module of AR glasses in the prior art;

[0034] Figure 2 A schematic structural diagram of a first implementation of a lens module provided in an embodiment of the present application;

[0035] Figure 3 A schematic structural diagram of a second implementation of a lens module provided in an embodiment of the present application;

[0036] Figure 4 A schematic structural diagram of a third implementation of a lens module provided in an embodiment of the present application;

[0037] Figure 5 A schematic structural diagram of a fourth implementation of a lens module provided in an embodiment of the present application;

[0038] Figure 6 A schematic structural diagram of a fifth implementation of a lens module provided in an embodiment of the present application;

[0039] Figure 7 A structural schematic diagram of a sixth implementation of a lens module provided in an embodiment of the present application;

[0040] Figure 8 A structural schematic diagram of a seventh implementation of a lens module provided in an embodiment of the present application;

[0041] Fig. 9 It is a schematic diagram of the optical effect of another lens module of AR glasses in the prior art;

[0042] Fig.10 A schematic diagram of the structure of an AR glasses provided in an embodiment of the present application.

[0043] Reference numerals:

[0044] 1. AR glasses; 10. lens module; 11. optical waveguide component; 111. optical waveguide lens; 1111. first target area; 1112. second target area; 1113. third target area; 1114. fourth target area; 1115. first grating structure; 1116. second grating structure; 1117. optical waveguide substrate; 1118. embossed adhesive layer; 112. first anti-reflection element; 113. second anti-reflection element; 115. first surface; 116 , second surface; 12, first protection component; 121, first cover plate; 122, third anti-reflection component; 123, composite layer; 13, second protection component; 131, second cover plate; 132, fourth anti-reflection component; 14, near-eye lens assembly; 141, optical lens; 142, rear coating; 15, front coating; 16, colloid; 20, frame module; 21, frame assembly; 22, temple assembly; 30, optical machine module; 40, near-eye lens module. DETAILED DESCRIPTION

[0045] The technical scheme of the embodiment of the present application will be described below in conjunction with the drawings in the embodiment of the present application. It is obvious that the described embodiment is a partial embodiment of the present application, not all embodiments. Based on the embodiment of the present application, other embodiments obtained by ordinary technicians in the field without making creative work belong to the scope of protection of the present application. The flowchart shown in the accompanying drawings is only an example, and it is not necessary to include all the contents and operations / steps, nor is it necessary to execute in the described order. For example, some operations / steps can also be decomposed, combined or partially merged, so the actual execution order may change according to the actual situation. The above is only a specific embodiment of the present application, but the protection scope 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 the present application, and these modifications or replacements should be included in the protection scope of the present application. Therefore, the protection scope of the present application shall be based on the protection scope of the claims.

[0046] 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.

[0047] like Figure 1 As shown, the lens module of the AR glasses at least includes a multilayer structure of an optical waveguide component, a first cover plate, and a second cover plate, and the first cover plate and / or the second cover plate are glass cover plates. Furthermore, some lens modules also include a near-eye lens component (such as a plano lens or a refractive lens). The multilayer structure in the lens module causes the ambient light incident from the outside to be lost through multiple interface reflections, especially the reflection degree of the side of the optical waveguide component forming the grating structure is high, resulting in low light transmittance of the lens module as a whole and the glasses are not clear enough.

[0048] 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.

[0049] See also Figure 2 and Figure 3 , Figure 2 This is a structural schematic diagram of a first implementation of a lens module provided in an embodiment of the present application. Figure 3 This is a schematic structural diagram of a second implementation of a lens module provided in one embodiment of the present application.

[0050] like Figure 2 and Figure 3 As shown, an embodiment of the present application provides a lens module 10 of AR glasses. 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 thereof, 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 and the user wears the AR glasses, and conversely, the far-eye side refers to the side of the lens module 10 away from the user's eye.

[0051] Specifically, the lens module 10 specifically includes an optical waveguide component 11 and a first protective component 12, wherein the optical waveguide component 11 at least includes an optical waveguide lens 111 and a first anti-reflection component 112, wherein 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, and a first target area 1111 and a second target area 1112 are formed on one side of the surface of the optical waveguide lens 111, the optical waveguide lens 111 is provided with a first grating structure 1115 in the first target area 1111, and the first anti-reflection component 112 is provided corresponding to the second target area 1112, the first protective component 12 is provided on a side of the optical waveguide lens 111 where the first grating structure 1115 is formed, and the first anti-reflection component 112 is provided between the first protective component 12 and the optical waveguide lens 111.

[0052] Among them, the first protection component 12 is a light-transmitting protection component to ensure that light entering from the outside of the AR glasses can pass through the first protection component 12, and the first protection component 12 at least covers the first grating structure 1115 to protect the first grating structure 1115. In some embodiments, the first protection component 12 covers the first grating structure 1115 and the first anti-reflection element 112 to enhance the protection effect of the first protection component 12 on the entire optical waveguide lens 111 and the first grating structure 1115.

[0053] It should be noted that the first protection component 12 is disposed on one side of the optical waveguide lens 111 where the first grating structure 1115 is formed, and preferably, the first protection component 12 covers the first grating structure 1115 and the first anti-reflection element 112, in order to protect the first grating structure 1115 formed on the optical waveguide lens 111. It should be understood that the grating structure is a fine structure, and when the grating structure is worn, the optical properties of the grating will be damaged, so the first protection component 12 can improve the durability of the lens module 10.

[0054] The function of the first grating structure 1115 is explained as follows: In some examples, the first grating structure 1115 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 30 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.

[0055] The coupling-in grating and / or the coupling-out grating may be: 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, and the same is true for the coupling-out grating.

[0056] It should also be noted that the first anti-reflection element 112 is used to improve the light transmittance of the second target area 1112, so that the light loss generated when the light incident from the outside of the AR glasses enters the optical waveguide lens 111 from the surface of the second target area 1112 is reduced.

[0057] Exemplarily, the first anti-reflection element 112 is an anti-reflection film (the anti-reflection film is also called an anti-reflection coating), and the anti-reflection film may be coated on the second target area 1112 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 1112 on the surface of the optical waveguide lens 111 with the anti-reflection film and to prevent the first target area 1111 formed with the first grating structure 1115 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 1111 during the coating operation to prevent the anti-reflection film from being coated on the first target area 1111).

[0058] 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%.

[0059] It should be understood that, taking the first anti-reflection element 112 as an anti-reflection film as an example, since the first grating structure 1115 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 first grating structure 1115, the thickness of the anti-reflection film is uneven, and the anti-reflection film will affect the optical properties of the first grating structure 1115. Therefore, the lens module 10 provided in the present application sets the first anti-reflection element 112 to cover a range limited to the second target area 1112, and does not cover the first target area 1111.

[0060] The lens module 10 provided in the present application improves the overall light transmittance of the lens module 10 by setting a partially covering first anti-reflection component 112 on one side of the optical waveguide component 11 forming the first grating structure 1115, especially reducing the light loss generated when the light incident from the outside of the AR glasses enters the optical waveguide lens 111 from the surface of the second target area 1112.

[0061] Moreover, the lens module 10 provided in the present application has the first anti-reflection element 112 whose coverage range is limited to the second target area 1112 but does not cover the first target area 1111, thereby improving the overall light transmittance of the lens module 10 while ensuring the normal function of the first grating structure 1115.

[0062] See also Figure 4 , Figure 4 This is a schematic structural diagram of a third implementation of a lens module provided in one embodiment of the present application.

[0063] like Figure 4As shown, in some embodiments, the optical waveguide lens 111 is formed with a third target area 1113 and a fourth target area 1114 on a surface of a side away from the first grating structure 1115, and the optical waveguide lens 111 is provided with a second grating structure 1116 in the third target area 1113. The optical waveguide component 11 also includes a second anti-reflection element 113, and the second anti-reflection element 113 is arranged on a side of the optical waveguide lens 111 where the second grating structure 1116 is formed corresponding to the fourth target area 1114.

[0064] In this embodiment, one of the first grating structure 1115 and the second grating structure 1116 includes an in-coupling grating, and the other includes an out-coupling grating. That is, the first grating structure 1115 and the second grating structure 1116 are respectively formed on two opposite sides of the optical waveguide lens 111, and the in-coupling grating and the out-coupling grating are also respectively formed on two opposite sides of the optical waveguide lens 111.

[0065] For the side of the light waveguide lens 111 where the second grating structure 1116 is formed, it can be divided into a third target area 1113 and a fourth target area 1114. The second grating structure 1116 is specifically arranged in the third target area 1113, and the second anti-reflection element 113 covers the fourth target area 1114. Similar to the first anti-reflection element 112, the coverage of the second anti-reflection element 113 is limited to the fourth target area 1114, and does not cover the third target area 1113, which can improve the overall light transmittance of the lens module 10 while ensuring the normal function of the second grating structure 1116.

[0066] It should be understood that in the actual design of the lens module 10 , the coupling-in grating and the coupling-out grating may be disposed on the same side or on different sides of the waveguide lens 111 according to the optical design goal or process manufacturing conditions of the waveguide lens 111 .

[0067] See also Figure 5 , Figure 5 This is a schematic structural diagram of a fourth implementation of a lens module provided in one embodiment of the present application.

[0068] like Figure 5 As shown, in some embodiments, the first protection component 12 at least includes a first cover plate 121 , which is disposed on one side of the optical waveguide lens 111 where the first grating structure 1115 is formed, and is spaced apart from the optical waveguide component 11 .

[0069] Exemplarily, the first cover plate 121 is a light-transmitting cover plate, such as a glass cover plate, so that light entering from the outside of the AR glasses can pass through the first cover plate 121 while protecting the optical waveguide lens 111 .

[0070] Preferably, the first cover plate 121 covers the first grating structure 1115 and the first anti-reflection element 112 to enhance the protection effect of the first cover plate 121 on the entire optical waveguide lens 111 and the first grating structure 1115 .

[0071] like Figure 5 As shown, in some embodiments, the first protection assembly 12 further includes a third anti-reflection member 122, and the third anti-reflection member 122 is disposed on at least one side in the thickness direction of the first cover plate 121. That is, the third anti-reflection member 122 can be disposed on the near-eye side of the first cover plate 121, or on the far-eye side of the first cover plate 121, or as shown in FIG. Figure 5 As shown, the two parts are generally arranged on both sides of the first cover plate 121 in the thickness direction.

[0072] Exemplarily, the third anti-reflection element 122 is an anti-reflection film, and the anti-reflection film may be coated on at least one side of the first cover plate 121 in the thickness direction.

[0073] It should be noted that when the third anti-reflection component 122 is arranged on the side of the first cover plate 121 away from the optical waveguide lens 111, the transmittance of the light entering the first cover plate 121 from the far eye side of the lens module 10 increases; when the third anti-reflection component 122 is arranged on the side of the first cover plate 121 close to the optical waveguide lens 111, the transmittance of the light emitted from the first cover plate 121 to the optical waveguide lens 111 increases; when the third anti-reflection component 122 is simultaneously arranged on the side of the first cover plate 121 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 121 from the far eye side of the lens module 10 and the transmittance of the light emitted from the first cover plate 121 to the optical waveguide lens 111 both increase.

[0074] In some embodiments, the distance between the first protection component 12 and the first anti-reflection element 112 ranges from 0.01 mm to 10 mm.

[0075] It should be noted that when a third anti-reflection member 122 is disposed on the side of the first cover plate 121 close to the optical waveguide lens 111 , the distance between the first protection component 12 and the first anti-reflection member 112 refers to the distance between the third anti-reflection member 122 and the first anti-reflection member 112 .

[0076] When the third anti-reflection member 122 is not disposed on the side of the first cover plate 121 close to the optical waveguide lens 111 , the distance between the first protection component 12 and the first anti-reflection member 112 refers to the distance between the first cover plate 121 and the first anti-reflection member 112 .

[0077] 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.

[0078] like Figure 6 As shown, in some embodiments, the first protection component 12 includes a composite layer 123 covering one side of the optical waveguide lens 111 to form the first grating structure 1115, and the composite layer 123 and the surface of the first grating structure 1115 are adapted to each other; wherein the composite layer 123 includes at least a protective coating and an anti-reflection coating.

[0079] Specifically, the protective coating is disposed on a side of the optical waveguide lens 111 where the first grating structure 1115 is formed, and is at least used to protect the first grating structure 1115; and the anti-reflection coating is disposed on a side of the protective coating away from the optical waveguide lens 111, and is used to perform anti-reflection treatment on external light incident on the lens module 10.

[0080] For example, when the composite layer 123 is provided, a protective coating and an anti-reflection coating may be sequentially added to a surface of one side of the optical waveguide lens 111 forming the first grating structure 1115, so as to ensure that the composite layer 123 and the surface of the first grating structure 1115 are adapted to each other, so that the composite layer 123 achieves a better light transmission effect. Preferably, the refractive index of the composite layer 123 is between 1.2 and 1.8.

[0081] For example, the protective coating in the composite layer 123 includes an anti-wear film layer and an anti-fouling film layer disposed on the surface of the optical waveguide lens 111 on the side where the first grating structure 1115 is formed, wherein the protective coating, the anti-wear film layer and the anti-fouling film layer can all be polymer coatings.

[0082] Compared with the method of using the first cover plate 121 , this embodiment uses the composite layer 123 as the first protection component 12 , further improving the light transmittance of the first protection component 12 and avoiding the reflection effect of the first cover plate 121 made of glass, for example, on external incident light.

[0083] like Figure 6 As shown, in some embodiments, the first anti-reflection element 112 can be removed under the premise that the first protection component 12 includes a composite layer 123 covering one side of the optical waveguide lens 111 to form the first grating structure 1115, and the composite layer 123 includes an anti-reflection coating.

[0084] It should be noted that the composite layer 123 includes at least a protective coating and an anti-reflection coating, and the protective coating is equivalent to Figures 2 to 5 The first protective component 12 in the embodiment of the present invention is equivalent to the anti-reflective coating. Figures 2 to 5 The first anti-reflection element 112 in the Figure 6 In the lens module 10 shown, the first protection component 12 and the first anti-reflection element 112 are still disposed on one side of the optical waveguide lens 111 where the first grating structure 1115 is formed.

[0085] Furthermore, since the composite layer 123 itself already includes an anti-reflective coating, removing the first anti-reflective element 112 will not reduce the light transmittance of external incident light, but can reduce the size of the lens module 10 in the thickness direction, thereby facilitating the lightweight of the lens module 10 and the AR glasses.

[0086] like Figure 5 As shown, in some embodiments, the lens module 10 further includes a second protection component 13 , and the second protection component 13 is spaced apart from the light waveguide lens 111 on a side of the light waveguide lens 111 away from the first protection component 12 .

[0087] It should be understood that disposing the second protection component 13 on the side of the light waveguide lens 111 away from the first protection component 12 can enhance the protection effect of the light waveguide lens 111. Exemplarily, in some embodiments, the light waveguide lens 111 is provided with a second grating structure 1116 on the surface of the side away from the first grating structure 1115, and the light waveguide lens 111 can also effectively protect the second grating structure 1116. In addition, the second protection component 13 and the light waveguide lens 111 are spaced apart to prevent the second grating structure 1116 from being damaged.

[0088] In some embodiments, the second protection component 13 at least includes a second cover plate 131 . The second cover plate 131 is disposed on a side of the optical waveguide lens 111 away from the first protection component 12 and is spaced apart from the optical waveguide component 11 .

[0089] Exemplarily, the second cover plate 131 is a light-transmissive cover plate, such as a glass cover plate, so that the light emitted from the light waveguide lens 111 to the near-eye side can pass through the second cover plate 131 while protecting the light waveguide lens 111 .

[0090] In some embodiments, the second protection assembly 13 further includes a fourth anti-reflection member 132 , and the fourth anti-reflection member 132 is disposed on at least one side of the second cover plate 131 in the thickness direction.

[0091] Exemplarily, the fourth anti-reflection element 132 is an anti-reflection film, and the anti-reflection film may be coated on at least one side of the second cover plate 131 in the thickness direction.

[0092] It should be noted that when the fourth anti-reflection component 132 is disposed on the side of the second cover plate 131 away from the optical waveguide lens 111, the transmittance of light entering the second cover plate 131 from the far eye side of the lens module 10 increases; when the fourth anti-reflection component 132 is disposed on the side of the second cover plate 131 close to the optical waveguide lens 111, the transmittance of light emitted from the second cover plate 131 to the near eye side increases; when the fourth anti-reflection component 132 is disposed on both the side of the second cover plate 131 away from the optical waveguide lens 111 and the two sides close to the optical waveguide lens 111, the transmittance of light entering the second cover plate 131 from the far eye side of the lens module 10 and the transmittance of light emitted from the second cover plate 131 to the near eye side both increase.

[0093] It is further explained that the "first anti-reflection element 112", "second anti-reflection element 113", "third anti-reflection element 122" and "fourth anti-reflection element 132" appearing in the embodiments of the present application can all be anti-reflection films, and 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%.

[0094] In some embodiments, the distance between the second protection component 13 and the optical waveguide component 11 ranges from 0.01 mm to 10 mm.

[0095] It should be pointed out that when the fourth anti-reflection component 132 is provided on the side of the second cover plate 131 close to the optical waveguide lens 111 and the optical waveguide component 11 is not provided with the second anti-reflection component 113, the distance between the second protection component 13 and the optical waveguide component 11 refers to the distance between the fourth anti-reflection component 132 and the optical waveguide lens 111.

[0096] When the fourth anti-reflection member 132 is not provided on the side of the second cover plate 131 close to the optical waveguide lens 111 and the optical waveguide component 11 is not provided with the second anti-reflection member 113 , the distance between the second protection component 13 and the optical waveguide component 11 refers to the distance between the second cover plate 131 and the optical waveguide lens 111 .

[0097] When the fourth anti-reflection member 132 is disposed on the side of the second cover plate 131 close to the optical waveguide lens 111 and the optical waveguide component 11 is provided with the second anti-reflection member 113 , the distance between the second protection component 13 and the optical waveguide component 11 refers to the distance between the fourth anti-reflection member 132 and the second anti-reflection member 113 .

[0098] When the fourth anti-reflection member 132 is disposed on the side of the second cover plate 131 close to the optical waveguide lens 111 and the optical waveguide component 11 is not provided with the second anti-reflection member 113 , the distance between the second protection component 13 and the optical waveguide component 11 refers to the distance between the second cover plate 131 and the second anti-reflection member 113 .

[0099] like Figure 2 , Figure 3 , Figure 4 and Figure 5 As shown, in some other embodiments, the second protection component 13 is not disposed on the side of the optical waveguide lens 111 away from the first protection component 12 .

[0100] It should be noted that compared with Figure 1 The lens module 10 of the prior art shown in the figure is as follows Figure 5 The lens module 10 shown in the present application may not be provided with a cover plate or other protective parts as the second protective component 13 on the near-eye side of the optical waveguide lens 111, thereby reducing light reflection caused by the provision of the second protective component 13 and improving the overall light transmittance of the lens module 10.

[0101] Especially considering that Figure 7 In the AR glasses shown, a near-eye lens assembly 14 (such as a refractive lens or a plano lens) is also provided on the near-eye side of the lens module 10. The near-eye lens assembly 14 can realize the optical waveguide lens 111. Therefore, it is feasible to directly provide no cover plate or other protective components on the near-eye side of the optical waveguide lens 111.

[0102] like Figure 6 As shown, in some embodiments, the waveguide lens 111 includes a waveguide substrate 1117 and a printed adhesive layer 1118 , wherein the printed adhesive layer 1118 is disposed on at least one side of the waveguide substrate 1117 in its thickness direction, and the printed adhesive layer 1118 forms a first grating structure 1115 .

[0103] In some embodiments, the embossed adhesive layer 1118 may be disposed on two opposite sides of the optical waveguide substrate 1117 in the thickness direction thereof. The embossed adhesive layers 1118 disposed on two opposite sides of the optical waveguide substrate 1117 respectively form the aforementioned Figure 3 A first grating structure 1115 and a second grating structure 1116 are shown.

[0104] 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.

[0105] like Figure 7As shown in (a) and (b), 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 first protection component 12 to each other as shown in (a) and (b), or to fix the edge of the optical waveguide component 11 and the second protection component 13 to each other as shown in (b). 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 first protection component 12 and / or between the optical waveguide component 11 and the second protection 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 first protection component 12 and / or between the optical waveguide component 11 and the second protection component 13.

[0106] 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.

[0107] like Figure 8 As shown, in some embodiments, the lens module 10 has a near-eye side and a far-eye side relative to each other, and the lens module 10 also includes a near-eye lens assembly 14, which is disposed on the near-eye side of the optical waveguide lens 111; wherein the near-eye lens assembly 14 is one of a refractive lens and a plano lens.

[0108] It should be understood that the refractive lens is, for example, a myopia lens or a hyperopia lens, wherein the refractive lens is used to adjust the light incident on the refractive lens to meet the user's vision correction needs. Specifically, when the user of the AR glasses needs vision correction, the image light signal generated by the optical module 30 of the AR glasses is transmitted through the optical waveguide component 11 and emitted to the refractive lens, while the light from the outside world directed to the AR glasses passes through the optical waveguide component 11 and also enters the refractive lens. The refractive lens can perform refractive adjustment on the two incident lights so that the light after refractive adjustment reaches the user's field of view.

[0109] It should be understood that if there is no need for vision correction, the refractive lenses can be replaced with plano lenses, and the light incident from the outside and the image light signal output by the optical module 30 of the AR glasses are superimposed and pass through the plano lenses into the user's field of view.

[0110] like Figure 8 As shown, in some embodiments, the near-eye lens assembly 14 includes an optical lens 141 and a rear coating 142, the optical lens 141 is disposed on the near-eye side of the optical waveguide lens 111 and is spaced apart from the optical waveguide assembly 11, and the rear coating 142 is disposed on the near-eye side of the optical lens 141;

[0111] The lens module 10 further includes a front coating 15 disposed on the far-eye side of the optical waveguide component 11 and the first protection component 12 , wherein the front coating 15 at least includes an anti-blue light coating.

[0112] It should be noted that disposing the front coating 15 including the anti-blue light coating on the far-eye side of the optical waveguide component 11 and the first protection component 12 can effectively eliminate interference images such as double images, ghost images, rainbow patterns, etc. entering the human eye.

[0113] Please refer to Fig. 9 , Fig. 9 Schematic diagram of the optical effect of another lens module 10 of AR glasses in the prior art.

[0114] like Fig. 9 As shown, in the lens module structure of some existing AR glasses in the related technology, it includes an optical waveguide and a first cover plate and a second cover plate respectively located on the far-eye side and the near-eye side of the optical waveguide, and the near-eye side of the second cover plate is generally required to be used in conjunction with a near-eye lens assembly, wherein the near-eye lens assembly is, for example, a refractive lens. However, since the surface of the refractive lens is often provided with an anti-blue light coating, when the light emitted from the outside to the lens module reaches the anti-blue light coating, part of the light (especially the blue light) will be reflected by the anti-blue light coating to the embossed adhesive layer of the optical waveguide assembly, and then reflected for the second time by the embossed adhesive layer to enter the user's field of view, forming interference images such as reflected double images, ghost images, rainbow patterns, etc., which enter the user's field of view and interfere with the user's viewing of normal images.

[0115] Therefore, taking Figure 8 The solution shown is that the front coating 15 including the anti-blue light coating is arranged on the far-eye side of the optical waveguide component 11 and the first protection component 12, which can effectively eliminate interfering images such as double images, ghost images, rainbow patterns, etc. entering the human eye.

[0116] See also Fig.10 , Fig.10 A schematic diagram of the structure of an AR glasses 1 provided in an embodiment of the present application.

[0117] like Fig.10 As shown, the embodiment of the present application further provides an AR glasses 1, including: a lens module 10, a frame module 20 and an optical machine module 30. The components of the AR glasses 1 are described in detail below.

[0118] 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.

[0119] In some embodiments, the AR glasses 1 further include a near-eye lens module 40, which is disposed on the near-eye side of the lens module 10 and spaced apart from the lens module 10;

[0120] The near-eye lens assembly 14 is one of a refractive lens and a plano lens.

[0121] like Figures 2 to 10 As shown, in some embodiments, the first grating structure 1115 includes an in-coupling grating and an out-coupling grating;

[0122] The optical machine module 30 is arranged corresponding to the coupling grating of the lens module 10 and is used to output an optical signal to the coupling grating. The lens module 10 is configured to transmit the optical signal incident on the coupling grating to the coupling grating output.

[0123] like Figure 4 and Fig.10 As shown, in some embodiments, the optical waveguide lens 111 is formed with a third target area 1113 and a fourth target area 1114 on a surface of a side away from the first grating structure 1115, and the optical waveguide lens 111 is provided with a second grating structure 1116 in the third target area 1113. The optical waveguide component 11 also includes a second anti-reflection element 113, and the second anti-reflection element 113 is arranged on a side of the optical waveguide lens 111 where the second grating structure 1116 is formed corresponding to the fourth target area 1114.

[0124] Among them, one of the first grating structure 1115 and the second grating structure 1116 includes a coupling-in grating, and the other includes a coupling-out grating. The optical-mechanical module 30 corresponds to the coupling-in grating setting of the lens module 10 and is used to output an optical signal to the coupling-in grating. The lens module 10 is configured to transmit the optical signal incident on the coupling-in grating to the coupling-out grating output.

[0125] For example, in Fig.10 In the AR glasses 1 shown, the lens module has a coupling-in grating area and a coupling-out grating area, and the optical waveguide lens 111 forms a coupling-in grating on either side of the coupling-in grating area, and forms a coupling-out grating on either side of the coupling-out grating area.

[0126] Reference Figures 2 to 8It should be understood that for the lens module 10 shown, when the coupling-in grating is disposed on the far-eye side of the optical waveguide lens 111, the coupling-in grating is a reflective grating, and when the coupling-in grating is disposed on the near-eye side of the optical waveguide lens 111, the coupling-in grating is a transmissive grating, and the same is true for the coupling-out grating.

[0127] In summary, the embodiment of the present application provides a lens module 10 and AR glasses 1, wherein the lens module 10 includes: an optical waveguide component 11, at least including an optical waveguide lens 111 and a first anti-reflection component 112, wherein a first target area 1111 and a second target area 1112 are formed on one side surface of the optical waveguide lens 111, the optical waveguide lens 111 is provided with a first grating structure 1115 in the first target area 1111, and the first anti-reflection component 112 is provided corresponding to the second target area 1112; a first protective component 12, wherein the first protective component 12 is provided on a side of the optical waveguide lens 111 where the first grating structure 1115 is formed, and the first anti-reflection component 112 is provided between the first protective component 12 and the optical waveguide lens 111. The lens module 10 and AR glasses 1 provided in the embodiment of the present application are provided with a partially covering first anti-reflection component 112 on one side of the optical waveguide component 11 forming the first grating structure 1115, thereby ensuring that, under the premise that the grating structure functions normally, the overall light transmittance of the lens module 10 is improved, and interference 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 1 are eliminated, thereby improving the clarity and user experience of the user viewing the real world using the AR glasses 1.

[0128] It will be appreciated by those skilled in the art that all or some of the steps, systems, and functional modules / units in the methods 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. Such software may be distributed on a computer-readable medium, which may include a computer storage medium (or a non-transitory medium) and a communication medium (or a temporary medium).

[0129] 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.

[0130] It should also be understood that the term "and / or" used in the specification of this application and the appended claims refers to any combination of one or more of the associated listed items and all possible combinations, and includes these combinations. It should be noted that, in this article, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or system including a series of elements includes not only those elements, but also 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 at least comprises: An optical waveguide component at least comprises an optical waveguide lens and a first anti-reflection member, wherein a first target area and a second target area are formed on one side surface of the optical waveguide lens, a first grating structure is arranged in the first target area of ​​the optical waveguide lens, and the first anti-reflection member is arranged corresponding to the second target area; The first protection component is arranged on a side of the optical waveguide lens where the first grating structure is formed, and the first anti-reflection component is arranged between the first protection component and the optical waveguide lens.

2. The lens module according to claim 1, characterized in that: The optical waveguide lens is provided with a third target area and a fourth target area on a surface on a side away from the first grating structure. The optical waveguide lens is provided with a second grating structure in the third target area. The optical waveguide component further comprises a second anti-reflection component, and the second anti-reflection component is provided on a side of the optical waveguide lens where the second grating structure is formed corresponding to the fourth target area.

3. The lens module according to claim 1, characterized in that: The first protection component at least includes a first cover plate, which is disposed on a side of the optical waveguide lens where the first grating structure is formed, and is spaced apart from the optical waveguide component.

4. The lens module according to claim 3, characterized in that: The first protection component further includes a third anti-reflection member, and the third anti-reflection member is arranged on at least one side in the thickness direction of the first cover plate.

5. The lens module according to claim 1, characterized in that: The first protection component includes a composite layer covering the side of the optical waveguide lens forming the first grating structure, and the composite layer and the surface of the first grating structure are adapted to each other; Wherein, the composite layer at least includes a protective coating and an anti-reflection coating.

6. The lens module according to claim 1, wherein: The lens module further includes a second protection component, which is arranged on a side of the optical waveguide lens away from the first protection component.

7. The lens module according to claim 6, characterized in that: The second protection component at least includes a second cover plate, and the second cover plate is arranged on a side of the optical waveguide lens away from the first protection component and is spaced apart from the optical waveguide component.

8. The lens module according to claim 7, characterized in that: The second protection component further includes a fourth anti-reflection member, and the fourth anti-reflection member is arranged on at least one side in the thickness direction of the second cover plate.

9. The lens module according to any one of claims 1 to 8, characterized in that: The optical waveguide lens includes an optical waveguide substrate and an embossed adhesive layer, wherein the embossed adhesive layer is disposed on at least one side of the optical waveguide substrate in a thickness direction thereof, and the embossed adhesive layer forms the first grating structure.

10. The lens module according to any one of claims 1 to 8, characterized in that: The lens module has a near-eye side and a far-eye side opposite to each other, and the lens module further comprises a near-eye lens assembly, wherein the near-eye lens assembly is arranged on the near-eye side of the optical waveguide lens; Wherein, the near-eye lens assembly is one of a refractive lens and a plano lens.

11. The lens module according to claim 10, characterized in that: The near-eye lens assembly comprises an optical lens and a rear coating, wherein the optical lens is arranged on the near-eye side of the optical waveguide lens and is spaced apart from the optical waveguide assembly, and the rear coating is arranged on the near-eye side of the optical lens; The lens module further includes a front coating disposed on the far-eye side of the optical waveguide component and the first protective component, wherein the front coating at least includes an anti-blue light coating.

12. An AR glasses, characterized in that: The AR glasses include: The lens module according to any one of claims 1 to 11, wherein the lens module has a near-eye side and a far-eye side opposite to each other; A frame module, the frame module comprising a frame assembly and a temple assembly, the lens module is mounted on the frame assembly, the temple assembly is connected to the frame assembly and extends toward the near-eye side of the lens module; An optical machine module is connected to at least one of the frame assembly and the temple assembly and is arranged corresponding to the lens module.

13. The AR glasses according to claim 12, wherein: The AR glasses further include a near-eye lens module, which is arranged on the near-eye side of the lens module and spaced apart from the lens module; Wherein, the near-eye lens assembly is one of a refractive lens and a plano lens.

14. The AR glasses according to claim 12, wherein: The first grating structure includes an in-coupling grating and an out-coupling grating; The optical-mechanical module is arranged corresponding to the coupling-in grating of the lens module and is used to output an optical signal to the coupling-in grating. The lens module is configured to conduct the optical signal incident on the coupling-in grating to the coupling-out grating output.

15. The AR glasses according to claim 12, wherein: The optical waveguide lens is provided with a third target area and a fourth target area on a surface of a side away from the first grating structure, the optical waveguide lens is provided with a second grating structure in the third target area, the optical waveguide assembly further comprises a second anti-reflection component, and the second anti-reflection component is provided on a side of the optical waveguide lens where the second grating structure is formed corresponding to the fourth target area; Among them, one of the first grating structure and the second grating structure includes a coupling-in grating, and the other includes a coupling-out grating. The optical-mechanical module corresponds to the coupling-in grating setting of the lens module and is used to output an optical signal to the coupling-in grating. The lens module is configured to transmit the optical signal incident on the coupling-in grating to the coupling-out grating output.

Images