Optical waveguide structure, lens and AR glasses

Abstract

The utility model discloses an optical waveguide structure, a lens and AR glasses, and belongs to the technical field of augmented reality. According to the optical waveguide structure, a functional area is arranged on the surface of a waveguide layer; the protective layer is arranged on one side of the waveguide layer provided with the functional area, and a gap is formed between the protective layer and the waveguide layer; the protection layer and the waveguide layer are fixed through the connection structure, and the connection structure is wrapped by the waveguide layer and the protection layer together, so that the connection strength between the waveguide layer and the protection layer can be ensured on the basis of meeting the requirement of product beauty.

Description

Technical Field

[0001] The utility model relates to the technical field of augmented reality, and more specifically, to an optical waveguide structure, a lens and AR glasses. Background Art

[0002] AR glasses are an application form of augmented reality technology, which enhances the perception of the real world by superimposing virtual information in the user's field of view. With the advancement of technology and the growth of market demand, AR glasses are gradually moving from the laboratory to the consumer market. At present, the AR glasses market is showing a diversified trend. Different types of AR glasses serve different user groups according to their optical structure and functional positioning.

[0003] The optical solutions used by the more mature AR glasses on the market mainly include prisms, free-form surfaces, BirdBath and optical waveguides. Among them, the optical waveguide solution is considered to be the mainstream optical solution for consumer-grade AR glasses because of its lightness and high penetration of external light. The optical waveguide solution is mainly divided into geometric optical waveguides and diffraction optical waveguides.

[0004] The packaging method of the diffraction optical waveguide structure is mainly to set a protective layer on the side of the waveguide layer where the diffraction grating is set to prevent the diffraction grating structure from being damaged, and the protective layer and the waveguide layer are glued together by optical glue.

[0005] When the existing diffractive optical waveguide structure is applied to AR glasses with a half-frame structure, such as Figure 1 As shown, the optical adhesive between the protective layer and the waveguide layer is partially exposed to the air, which can easily lead to yellowing of the optical adhesive. The yellowing of the optical adhesive will affect the appearance of the product and reduce user acceptance on the one hand, and may be accompanied by a decrease in material properties, such as a decrease in bonding strength on the other hand.

[0006] With the support of the "Pioneer" and "Leader" R&D and research programs with project approval number 2023C01051, the utility model proposes an optical waveguide structure with beautiful appearance and good bonding strength. Utility Model Content

[0007] In view of the problems existing in the prior art, the purpose of the utility model is to provide an optical waveguide structure that can ensure the connection strength between the waveguide layer and the protective layer while meeting the requirements of product aesthetics.

[0008] In order to solve the above problems, the utility model provides an optical waveguide structure, comprising a waveguide layer, a protective layer and a connecting structure; a functional area is provided on the surface of the waveguide layer; the protective layer is arranged on a side of the waveguide layer where the functional area is provided, and a gap is provided between the protective layer and the waveguide layer; the protective layer and the waveguide layer are fixed by the connecting structure, and the connecting structure is jointly covered by the waveguide layer and the protective layer.

[0009] In an alternative embodiment of the present application, the protective layer is provided as a curved surface.

[0010] In an alternative embodiment of the present application, a connecting portion is peripherally provided around the protective layer away from the functional area. The connecting portion is attached to the waveguide layer through the connecting structure and is in close fit with the waveguide layer, so that the protective layer and the waveguide layer are fixed; the connecting structure includes an optical adhesive layer and / or a clamping structure.

[0011] In an alternative embodiment of the present application, the connecting structure includes an optical adhesive layer. At least one surface where the connecting portion and the waveguide layer are butted is provided with a glue application groove, and the optical adhesive layer is arranged in the glue application groove. The connecting portion is attached to the waveguide layer through the optical adhesive layer.

[0012] In an alternative embodiment of the present application, the connecting structure includes a clamping structure. The clamping structure is arranged between the connecting portion and the waveguide layer, and the connecting portion is attached to the waveguide layer through the clamping structure.

[0013] In an alternative embodiment of the present application, the connecting portion covers the peripheral side of the waveguide layer and covers a part of the surface of the waveguide layer where the functional area is provided. An optical adhesive layer is provided between the surface of the waveguide layer where the functional area is provided and the connecting portion to attach the connecting portion to the waveguide layer.

[0014] In an alternative embodiment of the present application, the clamping structure is provided between the peripheral side of the waveguide layer and the connecting portion.

[0015] In an alternative embodiment of the present application, when the number of waveguide layers is two or more, each adjacent two waveguide layers are connected through the connecting portion and the connecting structure; or each adjacent two waveguide layers are connected through the connecting structure.

[0016] The present application also provides a lens, including the above-mentioned optical waveguide structure and a refractive lens provided on at least one side of the optical waveguide structure.

[0017] The present application further provides an AR glasses, including a frame and the above-mentioned optical waveguide structure provided in the frame.

[0018] The optical waveguide structure provided by this application includes a waveguide layer, a protective layer, and a connection structure; a functional area is provided on the surface of the waveguide layer; the protective layer is disposed on one side of the waveguide layer where the functional area is located, and there is a gap between the protective layer and the waveguide layer; the protective layer and the waveguide layer are fixed by the connection structure, and the connection structure is jointly covered by the waveguide layer and the protective layer. In the optical waveguide structure of this application, the waveguide layer and the protective layer are connected through the connection structure, and the connection structure is jointly covered by the waveguide layer and the protective layer, so that the connection structure is not easily directly exposed to the air, and on the basis of meeting the aesthetic requirements of the product, the connection strength between the waveguide layer and the protective layer can be ensured. At the same time, the protective layer is set to be a curved surface, so that when the optical waveguide structure is applied to AR glasses, it is closer to the form of a conventional spectacle lens. Description of the Drawings

[0019] In order to more clearly illustrate the technical solutions of the embodiments of the present utility model or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the following drawings are only some embodiments of the present utility model. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained based on these drawings.

[0020] Figure 1 Schematic diagram of the optical waveguide structure of the prior art;

[0021] Figure 2 Schematic diagram one of the optical waveguide structure provided by the embodiment of this application;

[0022] Figure 3 Schematic diagram two of the optical waveguide structure provided by the embodiment of this application;

[0023] Figure 4 Schematic diagram three of the optical waveguide structure provided by the embodiment of this application;

[0024] Figure 5 Schematic diagram four of the optical waveguide structure provided by the embodiment of this application;

[0025] Figure 6 Schematic diagram five of the optical waveguide structure provided by the embodiment of this application;

[0026] Figure 7 Schematic diagram six of the optical waveguide structure provided by the embodiment of this application;

[0027] Figure 8 Schematic diagram seven of the optical waveguide structure provided by the embodiment of this application;

[0028] Figure 9 Schematic diagram eight of the optical waveguide structure provided by the embodiment of this application;

[0029] Figure 10 This is the ninth schematic diagram of the optical waveguide structure provided by the embodiments of the present application.

[0030] Explanation of the reference numerals in the figure:

[0031] 1 - waveguide layer; 2 - optical adhesive layer; 3 - protective layer; 4 - connecting part; 41 - dispensing groove; 5 - clamping structure; a - functional area. Detailed implementation manners

[0032] As Figure 1 shown, when the current optical waveguide structure is applied to an AR glasses with a semi - frame structure of the spectacle frame, the protective layer and the waveguide layer are fixed in the spectacle frame. Therefore, a part of the optical adhesive between the protective layer and the waveguide layer will be covered by the spectacle frame, but the other part not covered by the spectacle frame is directly exposed to the air. After long - term use, it is easy to cause the yellowing of the optical adhesive. On the one hand, the yellowing of the optical adhesive will affect the aesthetics of the product and reduce the user acceptance. On the other hand, it may be accompanied by a decline in material properties, such as a decline in the bonding strength.

[0033] Therefore, the present application provides an optical waveguide structure, in which the waveguide layer and the protective layer are connected through a connecting structure, and the connecting structure is jointly covered by the waveguide layer and the protective layer, so that the connecting structure is not easily directly exposed to the air, and the connection strength between the waveguide layer and the protective layer can be ensured on the basis of meeting the aesthetic requirements of the product.

[0034] In order to enable those skilled in the art to better understand the solution of the present utility model, the present utility model will be further described in detail below with reference to the accompanying drawings and specific implementation manners. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without making creative efforts shall fall within the protection scope of the present utility model.

[0035] In a specific embodiment of the present application, the optical waveguide structure includes a waveguide layer 1, a protective layer 3 and a connecting structure; a functional area a is provided on the surface of the waveguide layer 1; the protective layer 3 is arranged on the side of the waveguide layer 1 where the functional area a is located, and there is a gap between the protective layer 3 and the waveguide layer 1; the protective layer 3 and the waveguide layer 1 are fixed through the connecting structure, and the connecting structure is jointly covered by the waveguide layer 1 and the protective layer 3.

[0036] Among them, the functional area a is formed by micro - nano structures. The functional area a includes an incident area for coupling image light into the waveguide layer 1 and an output area for coupling the image light that is totally reflected in the waveguide layer 1 out to the human eye. Preferably, the incident area and the output area are arranged on the same side surface of the waveguide layer 1.

[0037] In other embodiments, the functional area a further includes a turning area, which is arranged between the coupling-in area and the coupling-out area; the image light is coupled into the waveguide layer 1 through the coupling-in area, then enters the turning area after being totally reflected in the waveguide layer 1, and then is conducted to the waveguide layer 1 through the turning area for totally reflecting, and then enters the coupling-out area for coupling out to the human eye. The image light can be turned through the turning area.

[0038] The working principle of the optical waveguide structure is: the image to be presented is emitted by the optical machine, and part of the light is introduced into the waveguide layer 1 through the coupling-in area. After multiple total reflections, the light is emitted into the human eye from the coupling-out area, and then the human eye perceives the image. In order not to destroy the total reflection transmission condition of the waveguide layer 1, a gap needs to be set between the waveguide layer 1 and the protective layer 3.

[0039] In order to make the optical waveguide structure applied to AR glasses closer to conventional glasses, in an optional embodiment of the present application, the protective layer 3 is set as a curved surface. Of course, in other embodiments, the protective layer 3 can also be set as a plane. It can be understood that when the protective layer 3 is set as a curved surface, in order to facilitate assembly, the waveguide layer 1 can be set as a curved waveguide layer. Of course, the waveguide layer 1 can also be set as a planar waveguide layer.

[0040] In addition, it can be understood that the material of the protective layer 3 is not particularly limited, and those skilled in the art can select it according to actual needs. Exemplarily, the material of the protective layer 3 can be glass, resin or plastic. Among them, the plastic material can be PET or PC, etc. In this way, the protective layer 3 can have comprehensive properties such as good wear resistance, high strength and good impact resistance, thereby improving the service life of the protective layer 3 and reducing the thickness of the protective layer 3, so that the optical waveguide structure can be lighter and thinner.

[0041] Due to the limited brightness of the optical engine and some losses of light after passing through the waveguide layer 1, the intensity of the light entering the human eye is limited. When the user uses the AR glasses outdoors, if the ambient light is too strong, it will cause the contrast and saturation of the image perceived by the human eye to decrease, and the image clarity to decline, affecting the user experience. For this reason, in an optional embodiment of the present application, a photochromic layer is provided on the protective layer 3. By integrating the photochromic layer with the protective layer 3, it is used to weaken the brightness of the sunlight entering the human eye in an outdoor strong light environment, improve the clarity, contrast, and saturation of the image when the AR glasses are used outdoors, and greatly enhance the user experience. It can be understood that the setting method of the photochromic layer on the protective layer 3 is not particularly limited, and those skilled in the art can flexibly select according to the actual situation. Exemplarily, the surface of the protective layer 3 that needs to be provided with the photochromic layer can be immersed in the photochromic liquid, and then a curing operation is performed, so as to directly set the photochromic layer 6 on the protective layer 3. It is also possible to coat the photochromic liquid on a substrate and perform a curing operation to first obtain a photochromic layer, and then attach the substrate to the protective layer 3. The photochromic layer can be provided on the side of the protective layer 3 close to the waveguide layer 1, or on the side of the protective layer 3 far from the waveguide layer 1, which is not specifically limited here and can be set according to actual use requirements.

[0042] In an optional embodiment of the present application, a connecting portion 4 is provided around the protective layer 3 away from the functional area. The connecting portion 4 is attached to the waveguide layer 1 through a connecting structure and is closely attached to the waveguide layer 1, so that the protective layer 3 and the waveguide layer 1 are fixed; the connecting structure includes an optical adhesive layer 2 and / or a clamping structure 5. Among them, the connecting portion 4 and the protective layer 3 can be integrally provided or separately provided. In addition, under the gluing action of the optical adhesive layer 2, on the basis of attaching the connecting portion 4 to the waveguide layer 1, the gluing area of the optical adhesive layer 2 is as large as possible to ensure the connection strength between the connecting portion 4 and the waveguide layer 1. The way to increase the gluing area of the optical adhesive layer 2 can be to provide optical adhesive layers on both the connecting portion 4 and the waveguide layer 1. The optical adhesive layers on both can be superimposed in the horizontal or vertical direction, or staggered in the horizontal or vertical direction, which is not specifically limited here.

[0043] Optionally, the connection structure includes an optical adhesive layer 2. At least one surface of the connection part 4 and the waveguide layer 1 that are butted is provided with a glue dispensing groove 41. The optical adhesive layer 2 is arranged in the glue dispensing groove 41, and the connection part 4 is attached to the waveguide layer 1 through the optical adhesive layer 2. It can be understood that the glue dispensing groove 41 can be arranged on the surface of the connection part 4, can also be arranged on the surface of the waveguide layer 1, or can also be arranged on the surfaces of both the connection part 4 and the waveguide layer 1 to increase the bonding area of the optical adhesive layer between the connection part 4 and the waveguide layer 1 and ensure the connection strength between the connection part 4 and the waveguide layer 1. Among them, the glue dispensing groove 41 can be a through groove or not, and the number of the glue dispensing grooves 41 is not specifically limited and can be determined according to actual use requirements. The connection structure can also be a magnetic attraction structure or any other structure that can realize the connection between the waveguide layer 1 and the protective layer 3, which will not be elaborated in detail here.

[0044] As Figure 2 shown, the connection part 4 is located on the upper surface of the waveguide layer 1 and is in close contact with it. The connection between the connection part 4 and the waveguide layer 1 is carried out through the optical adhesive layer 2 in the glue dispensing groove 41 on the connection part 4 or the waveguide layer 1. The optical adhesive layer 2 is jointly covered by the connection part 4 and the waveguide layer 1 and is not easily directly exposed to the air. The connection part 4 can be an annular structural member arranged around the outer peripheral side of the protective layer 3, or can be arranged at intervals around the outer peripheral side of the protective layer 3. When there are multiple connection parts 4 and they are arranged at intervals around the outer peripheral side of the protective layer 3, it is necessary to ensure that the outer peripheral side of the protective layer 3 is in close contact with the upper surface of the waveguide layer 1. For the convenience of assembling the optical waveguide structure with the spectacle frame, the outer peripheral side of the connection part 4 can be set to be flush with the outer peripheral side of the waveguide layer 1.

[0045] As Figure 3 shown, the connection part 4 is arranged on the peripheral side of the waveguide layer 1. The notch of the glue dispensing groove 41 on the connection part 4 faces the waveguide layer 1. The lower end of the connection part 4 extends towards the waveguide layer 1 until it abuts against the peripheral side surface of the waveguide layer 1, which can not only prevent the optical adhesive layer 2 in the glue dispensing groove 41 from being exposed to the air, but also protect the peripheral side of the waveguide layer 1. Looking at the left half of the figure shown, the cross-section of the connection part 4 is in an "L" shape, and the optical adhesive layer 4 is covered in the inner "L" shaped area of the connection part 4. Of course, in other embodiments, an optical adhesive layer 4 can also be arranged in the edge area of the upper surface of the waveguide layer 1 to bond the protective layer 3 and the waveguide layer 1, increase the bonding area of the optical adhesive layer 4, and ensure the connection strength between the waveguide layer 1 and the protective layer 3.

[0046] As Figure 4 shown, the connection part 4 is arranged on the peripheral side of the waveguide layer 1. The notch of the glue dispensing groove 41 on the connection part 4 faces the waveguide layer 1. To prevent the optical adhesive layer 2 in the glue dispensing groove 41 from being exposed to the air, the lower end of the connection part 4 extends towards the waveguide layer 1 until it abuts against the lower surface of the waveguide layer 1, and the optical adhesive layer 4 is covered in the inner glue dispensing groove 41 area of the connection part 4.

[0047] In an alternative embodiment of the present application, when the connection structure includes a snap connection structure 5, the snap connection structure 5 is disposed between the connection portion 4 and the snap connection structure 5, and the connection portion 4 is attached to the waveguide layer 1 through the snap connection structure 5. The snap connection structure 5 may include a snap and a slot. As Figure 5 shown, the snap is disposed on the upper surface of the waveguide layer 1 close to the connection portion 4, and the slot is disposed on the connection portion 4; of course, the snap may also be disposed on the connection portion 4, and the slot is disposed on the waveguide layer 1. The connection portion 4 is connected to the waveguide layer 1 through the snap connection structure 5, that is, the protective layer 3 is connected to the waveguide layer 1, avoiding the yellowing problem that may be caused by using the optical adhesive layer 2. The connection between the protective layer 3 and the waveguide layer 1 is firm, and when the optical waveguide structure is assembled in the frame, a part of the connection between the protective layer 3 and the waveguide layer 1 will also be fixed by the frame, making the connection between the waveguide layer 1 and the protective layer 3 more firm.

[0048] In another alternative embodiment of the present application, the connection portion 4 covers the peripheral side of the waveguide layer 1 and covers a part of the surface of the waveguide layer 1 where the functional area a is provided. An optical adhesive layer 2 is provided between the surface of the waveguide layer 1 where the functional area a is provided and the connection portion 4 to attach the connection portion 4 to the waveguide layer 1. The peripheral side of the waveguide layer 1 is the vertical plane of the surface of the waveguide layer 1 where the functional area a is provided. For Figure 6 exemplary illustration, the connection portion 4 includes a first connection portion and a second connection portion that are perpendicular to each other. The first connection portion and the second connection portion are connected to form an inverted "L" - shaped structure. The first connection portion is parallel to the surface of the waveguide layer 1 where the functional area a is provided, and the second connection portion abuts against the peripheral side of the waveguide layer. The first connection portion is connected to the waveguide layer 1 through the optical adhesive layer 2. At this time, the optical adhesive layer 2 is covered by the second connection portion and is isolated from the outside air, that is, under the covering action of the protective layer 3 and the waveguide layer 1, the optical adhesive layer 2 is not directly exposed to the air.

[0049] Optionally, when the connection portion 4 is connected to the waveguide layer 1 through the optical adhesive layer 2, in order to further strengthen the connection between the connection portion 4 and the waveguide layer 1, therefore, a snap connection structure 5 is provided between the peripheral side of the waveguide layer 1 and the connection portion 4. For Figure 7 exemplary illustration as shown in Figure 7 , the snap connection structure 5 adopts a cooperation structure of a snap and a slot. The snap is disposed on the surface of the connection portion 4 close to the waveguide layer 1, that is, on the second connection portion described above, and the slot is disposed on the peripheral side surface of the waveguide layer 1. Of course, the positions of the slot and the snap can be interchanged. The connection between the waveguide layer 1 and the connection portion 4 is further stabilized through the snap connection structure 5, and at the same time, the optical adhesive layer 2 is not exposed to the air.

[0050] In another alternative embodiment of the present application, when the number of waveguide layers 1 is two or more, every two adjacent waveguide layers 1 are connected by a connecting portion 4 and a connecting structure; or every two adjacent waveguide layers 1 are connected by a connecting structure. By using multiple waveguide layers 1, stacked imaging can be performed to achieve full-color display. As Figure 8 shown, every two adjacent waveguide layers 1 are connected by a connecting portion 4 and a connecting structure. A glue dispensing groove 41 is provided on the connecting portion 4. The glue dispensing groove 41 is a through groove, that is, the glue dispensing groove 41 penetrates through both ends of the connecting portion 4. The connecting structure uses an optical glue layer 2, and the optical glue layer 2 in the glue dispensing groove 41 is used to connect the two adjacent waveguide layers 1 up and down. Or as Figure 9 shown, the lower end of the connecting portion 4 extends to abut against the peripheral side of the lowermost waveguide layer 1. A plurality of glue dispensing grooves 41 are provided on one side of the connecting portion 4 close to the waveguide layer 1. The positions and numbers of the glue dispensing grooves 41 correspond to those of the waveguide layer 1. The connecting portion 4 is connected to the multiple waveguide layers 1 through the optical glue layer 2 in the glue dispensing grooves 41. Or as Figure 10 shown, every two adjacent waveguide layers are connected by a connecting structure. The connecting structure uses an optical glue layer 2 or a clamping structure 5. Figure 10 The case where the connecting structure uses an optical glue layer is exemplified in

[0051] When the optical waveguide structure of the present application is applied to AR glasses, considering that the population of users with refractive abnormalities is gradually expanding, in order to take into account the usage scenario where it is inconvenient for users to wear separate refractive lenses when using AR glasses, the present application also provides a lens, including the optical waveguide structure as described above and a refractive lens provided on at least one side of the optical waveguide structure. The refractive lens can be provided on the side of the optical waveguide structure close to the human eye to correct the display picture of the AR glasses and correct the external environment picture at the same time; or provided on the side of the optical waveguide structure away from the human eye to only correct the external environment picture; or refractive lenses are provided on both sides of the optical waveguide structure, and the optical powers of the refractive lenses on both sides can be the same or different, and can be specifically selected according to actual usage requirements. The connection method between the refractive lens and the optical waveguide structure can be gluing, clamping, riveting, etc., which are not specifically limited herein.

[0052] The present application further provides an AR glasses, including a frame and the optical waveguide structure as described above provided in the frame. The optical waveguide structure is assembled in the frame through an assembly structure. It should be noted that the optical waveguide structure of the present application is applicable not only to AR glasses with a semi-frame structure but also to AR glasses with a full-frame structure.

[0053] In summary, in the optical waveguide structure of the present application, the waveguide layer and the protective layer are connected through a connecting portion and a connecting structure, and the connecting structure is covered by the waveguide layer and the protective layer, so that the connecting structure is not easily directly exposed to the air, and the connection strength between the waveguide layer and the protective layer can be ensured on the basis of meeting the aesthetic requirements of the product.

[0054] It should be noted that in this text, relational terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the term "including", "comprising" or any other variant thereof is intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes the inherent elements thereof. Without further limitation, an element defined by the statement "including a..." does not exclude the existence of additional identical elements in the process, method, article or device including the said element. In addition, the parts of the above technical solutions provided in the embodiments of the present application that are consistent with the corresponding technical solutions in the prior art in terms of implementation principles are not described in detail to avoid excessive elaboration.

[0055] In this article, specific examples are used to elaborate on the principles and implementation manners of the present utility model. The description of the above embodiments is only used to help understand the method and its core idea of the present utility model. It should be pointed out that for those of ordinary skill in the art in this technical field, without departing from the principle of the present utility model, several improvements and modifications can be made to the present utility model, and these improvements and modifications also fall within the protection scope of the claims of the present utility model.

Claims

1. An optical waveguide structure, characterized in that: The invention comprises a waveguide layer, a protective layer and a connection structure; a functional area is provided on the surface of the waveguide layer; the protective layer is arranged on a side of the waveguide layer provided with the functional area, and a gap is provided between the protective layer and the waveguide layer; the protective layer and the waveguide layer are fixed by the connection structure, and the connection structure is covered by the waveguide layer and the protective layer.

2. The optical waveguide structure according to claim 1, characterized in that: The protective layer is configured as a curved surface.

3. The optical waveguide structure according to claim 1, characterized in that: The protective layer is provided with a connection part away from the functional area, and the connection part is attached to the waveguide layer through the connection structure and is tightly fitted to the waveguide layer, so that the protective layer and the waveguide layer are fixed; the connection structure includes an optical adhesive layer and / or a clamping structure.

4. The optical waveguide structure according to claim 3, characterized in that: The connection structure comprises an optical adhesive layer, at least one surface where the connection part and the waveguide layer are connected is provided with an adhesive dispensing groove, the optical adhesive layer is arranged in the adhesive dispensing groove, and the connection part is attached to the waveguide layer through the optical adhesive layer.

5. The optical waveguide structure according to claim 3, characterized in that: The connection structure includes a clamping structure, which is disposed between the connection portion and the waveguide layer, and the connection portion is attached to the waveguide layer through the clamping structure.

6. The optical waveguide structure according to claim 3, characterized in that: The connecting portion covers the peripheral side of the waveguide layer and covers a portion of the surface of the waveguide layer provided with the functional area. An optical adhesive layer is provided between the surface of the waveguide layer provided with the functional area and the connecting portion to attach the connecting portion to the waveguide layer.

7. The optical waveguide structure according to claim 6, characterized in that: A clamping structure is provided between the peripheral side of the waveguide layer and the connecting portion.

8. The optical waveguide structure according to claim 3, characterized in that: When the number of the waveguide layers is two or more, every two adjacent waveguide layers are connected via the connecting portion and the connecting structure; or every two adjacent waveguide layers are connected via the connecting structure.

9. A lens, characterized in that: The optical waveguide structure comprises the optical waveguide structure according to any one of claims 1 to 8 and a refractive lens arranged on at least one side of the optical waveguide structure.

10. An AR glasses, characterized in that: The optical waveguide structure comprises a mirror frame and the optical waveguide structure according to any one of claims 1 to 8 arranged in the mirror frame.

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