Optical waveguide assembly, lens module and intelligent glasses

Abstract

The embodiment of the invention discloses an optical waveguide assembly, a lens module and intelligent glasses, the optical waveguide assembly comprises an optical waveguide sheet, a grating structure and a protection member, the grating structure is formed on a first surface and / or a second surface of the optical waveguide sheet, and the protection member is at least arranged on one side, where the grating structure is formed, of the optical waveguide sheet. The protection piece and the optical waveguide sheet are connected in a gluing mode to form a sealed cavity, and the sealed cavity is in a vacuum state or is filled with non-oxygen-containing gas. The optical waveguide assembly can effectively block damage of ultraviolet irradiation to the grating, and the stability and the optical performance of the optical waveguide assembly are improved.

Description

Technical Field

[0001] The present invention relates to the field of optical technology, and more particularly, to an optical waveguide component, a lens module and smart glasses. Background Art

[0002] Waveguide technology plays a crucial role in smart glasses, particularly in enabling augmented reality (AR) functionality. Waveguides primarily guide light, enabling the transmission of virtual images from the projection source to the user's eyes, presenting them in a natural and comfortable manner. However, the gratings in the waveguide structure are susceptible to optical degradation after prolonged exposure to ultraviolet light or high-temperature cycles, resulting in reduced display brightness and a negatively impacting the user experience.

[0003] Currently, there are two solutions to address the reduced light efficiency after ultraviolet radiation exposure: 1) Applying a coating, such as titanium dioxide or silicon dioxide, to the grating surface. This coating can isolate the grating from air, preventing surface oxidation and thus reducing the effects of ultraviolet radiation. However, coating can affect the optical properties of the waveguide, such as transmittance and diffraction performance; the coating process is also complex and can easily reduce the waveguide yield. 2) Using a grating adhesive with good UV resistance to form the grating, primarily composed of materials such as titanium dioxide or silicon dioxide. For example, titanium dioxide undergoes a photocatalytic reaction under ultraviolet (UV) radiation, causing the material surface to oxidize and decompose, resulting in changes in the size of the grating. This ultimately leads to lower diffraction efficiency and poorer overall light efficiency. Summary of the Invention

[0004] In view of this, embodiments of the present invention provide an optical waveguide component, a lens module, and smart glasses, which can effectively block damage to the grating caused by ultraviolet radiation and improve the stability and optical performance of the optical waveguide component.

[0005] In a first aspect, an embodiment of the present invention provides an optical waveguide component, the optical waveguide component comprising:

[0006] an optical waveguide sheet having a first surface and a second surface opposite to each other;

[0007] a grating structure formed on the first surface and / or the second surface of the optical waveguide;

[0008] a protective member, provided at least on a side of the optical waveguide plate where the grating structure is formed;

[0009] The protective member and the optical waveguide sheet are glued together to form a sealed cavity, and the sealed cavity is in a vacuum state or filled with a non-oxygen-containing gas.

[0010] Optionally, the grating structure is formed on the first surface of the optical waveguide sheet;

[0011] The protective member includes at least a first cover plate, which is arranged outside the first surface of the optical waveguide sheet. The first cover plate and the optical waveguide sheet are glued together to form a first sealed cavity, which is in a vacuum state or filled with non-oxygen-containing gas.

[0012] Optionally, a first anti-reflection layer is provided on at least one side of the first cover plate in the thickness direction, and the first anti-reflection layer is laminated to the first cover plate.

[0013] Optionally, the grating structure is formed on the second surface of the optical waveguide sheet;

[0014] The protective member includes at least a second cover plate, which is arranged on the outer side of the second surface of the optical waveguide sheet. The second cover plate and the optical waveguide sheet are glued together to form a second sealed cavity, which is in a vacuum state or filled with non-oxygen-containing gas.

[0015] Optionally, a second anti-reflection layer is provided on at least one side of the second cover plate in the thickness direction, and the second anti-reflection layer is laminated to the second cover plate.

[0016] Optionally, the grating structure includes an in-coupling grating and an out-coupling grating, and the in-coupling grating and the out-coupling grating are formed on the first surface and the second surface of the optical waveguide plate respectively;

[0017] The protective member includes a first cover plate and a second cover plate, wherein the first cover plate is arranged on the outside of the first surface of the optical waveguide sheet, and the second cover plate is arranged on the outside of the second surface of the optical waveguide sheet, and the first cover plate and the optical waveguide sheet are glued together to form a first sealed cavity, and the first sealed cavity is in a vacuum state or filled with a non-oxygen-containing gas, and the second cover plate and the optical waveguide sheet are glued together to form a second sealed cavity, and the second sealed cavity is in a vacuum state or filled with a non-oxygen-containing gas.

[0018] Optionally, a first anti-reflection layer is provided on at least one side of the first cover plate in the thickness direction, and the first anti-reflection layer is bonded to the first cover plate, and a second anti-reflection layer is provided on at least one side of the second cover plate in the thickness direction, and the second anti-reflection layer is bonded to the second cover plate.

[0019] Optionally, the non-oxygen-containing gas is at least one of helium, argon, neon, nitrogen, krypton, xenon, and carbon dioxide.

[0020] Optionally, the purity of the non-oxygen-containing gas is greater than 99.999%.

[0021] In a second aspect, an embodiment of the present invention provides a lens module, comprising:

[0022] The optical waveguide assembly according to the first aspect has a near-eye side and a far-eye side opposite to each other;

[0023] The optical lens is arranged on the near-eye side of the optical waveguide component.

[0024] In a third aspect, an embodiment of the present invention provides smart glasses, the smart glasses comprising:

[0025] A frame assembly and a temple assembly connected to the frame assembly;

[0026] The lens module according to the second aspect is mounted on the frame assembly;

[0027] The 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, and the optical machine module is used to output an optical signal to the lens module.

[0028] Embodiments of the present invention provide an optical waveguide assembly, a lens module, and smart glasses. The optical waveguide assembly includes an optical waveguide sheet, a grating structure, and a protective member. The grating structure is formed on the first and / or second surface of the optical waveguide sheet. The protective member is disposed at least on the side of the optical waveguide sheet where the grating structure is formed. The protective member and the optical waveguide sheet are glued together to form a sealed cavity. The sealed cavity is in a vacuum state or filled with a non-oxygen-containing gas. This optical waveguide assembly can effectively block damage to the grating from ultraviolet radiation, thereby improving the stability and optical performance of the optical waveguide assembly. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] The above and other objects, features and advantages of the present invention will become more apparent through the following description of the embodiments of the present invention with reference to the accompanying drawings, in which:

[0030] Figure 1 1 is a schematic structural diagram of a first embodiment of an optical waveguide assembly provided by an embodiment of the present invention;

[0031] Figure 2 1 is a schematic structural diagram of a second embodiment of an optical waveguide assembly provided by an embodiment of the present invention;

[0032] Figure 3 1 is a schematic structural diagram of a third embodiment of an optical waveguide assembly provided by an embodiment of the present invention;

[0033] Figure 4 It is a structural schematic diagram of a lens module provided by an embodiment of the present invention.

[0034] Description of reference numerals:

[0035] 1-optical waveguide plate; 101-first surface; 102-second surface; 2-grating structure; 21-incoupling grating; 22-outcoupling grating; 3-protective member; 31-first cover plate; 32-second cover plate; 4-first sealed cavity; 5-second sealed cavity; 6-optical lens; 7-optical machine module; 8-colloid. DETAILED DESCRIPTION

[0036] The present application is described below based on the following embodiments, but the present application is not limited to these embodiments. In the detailed description of the present application below, certain specific details are described in detail. Those skilled in the art can fully understand the present application without the description of these details. To avoid obscuring the essence of the present application, well-known methods, processes, procedures, components, and circuits are not described in detail.

[0037] Furthermore, persons of ordinary skill in the art will appreciate that the figures provided herein are for illustration purposes only and are not necessarily drawn to scale.

[0038] Unless the context clearly requires otherwise, words like “include”, “comprising” and the like throughout this application should be interpreted as including rather than exclusive or exhaustive; that is, as meaning “including but not limited to”.

[0039] In the description of this application, it should be understood that the terms "first", "second", etc. are used for descriptive purposes only and should not be understood to indicate or imply relative importance. In addition, in the description of this application, unless otherwise specified, "plurality" means two or more.

[0040] like Figure 1-Figure 3 As shown, an embodiment of the present application provides an optical waveguide assembly, comprising an optical waveguide sheet 1, a grating structure 2, and a protective member 3. The optical waveguide sheet 1 has a first surface 101 and a second surface 102 disposed opposite each other in its thickness direction. The grating structure 2 is formed on at least one side of the first surface 101 and the second surface 102. The protective member 3 is disposed on at least one side of the optical waveguide sheet 1 where the grating structure 2 is formed.

[0041] Specifically, the protective member 3 is a light-transmitting protective component that ensures that light entering from the outside can pass through the protective member 3. The protective member 3 covers at least the outside of the grating structure 2. The protective member 3 and the optical waveguide sheet 1 are glued together to form a sealed cavity that covers and protects the grating structure 2. The sealed cavity is in a vacuum state or filled with a non-oxygen-containing gas. This places the grating structure 2 in a vacuum or non-oxygen-containing gas environment, preventing oxidation of the grating structure 2 from contact with air while also ensuring the optical performance and production yield of the optical waveguide assembly. Furthermore, the provision of the protective member 3 prevents wear and tear of the grating structure 2 from direct contact with external objects, thereby improving the durability of the optical waveguide assembly.

[0042] like Figure 1-Figure 3 As shown, the protective member 3 covers the entire surface of the first surface 101 and / or the second surface 102 of the optical waveguide plate 1 to enhance the protective effect of the protective member 3 on the entire optical waveguide plate 1 and the grating structure 2 .

[0043] The function of the grating structure 2 is explained as follows: the grating structure 2 includes an input grating 21 and an output grating 22, which can be arranged on the same side or different sides of the optical waveguide plate 1. The optical waveguide 1 is configured to transmit the light input from the input grating 21 to the output grating 22 and output it. The input grating 21 and the output grating 22 are both diffraction gratings, such as surface relief gratings or volume holographic gratings. In the smart glasses, the optical module 7 of the smart glasses is arranged corresponding to the input grating 21 and is used to output an optical signal to the input grating 21. The optical waveguide plate 1 transmits the optical signal input from the input grating 21 to the output grating 22 and outputs it, thereby allowing the optical signal output by the optical module 7 to enter the user's field of view.

[0044] like Figure 1 As shown, in some embodiments, the grating structure 2 is formed on the first surface 101 of the optical waveguide sheet 1, that is, the in-coupling grating 21 and the out-coupling grating 22 are both disposed on the first surface 101 of the optical waveguide sheet 1. The protective member 3 includes at least a first cover plate 31, which is disposed outside the first surface 101 of the optical waveguide sheet 1. The edges of the first cover plate 31 are sealed to the first surface 101 of the optical waveguide sheet 1 via a colloid 8 to form a first sealed cavity 4. The first cover plate 31 can at least completely cover the grating structure 2, so that after the first cover plate 31 and the optical waveguide sheet 1 are sealed, the grating structure 2 is located within the first sealed cavity 4.

[0045] The first cover plate 31 is a light-transmitting cover plate, such as a glass cover plate or a resin cover plate. This allows light from the outside to pass through the first cover plate 31, the light waveguide plate 1, the optical lens 6, and other components to reach the user's eyes for imaging, while protecting the optical waveguide plate 1. The first sealed cavity 4 is in a vacuum state or filled with a non-oxygen-containing gas to prevent the grating structure 2 from undergoing a photocatalytic reaction with oxygen in the air during light exposure, which could affect optical performance.

[0046] Preferably, the first cover plate 31 covers the entire surface of the first surface 101 of the optical waveguide sheet 1. The edges of the first cover plate 31 and the edges of the optical waveguide sheet 1 are sealed by a circle of colloid 8 to form a first sealed cavity 4. The first sealed cavity 4 is evacuated or filled with a non-oxygen-containing gas, thereby improving the protection effect of the first cover plate 31 on the entire optical waveguide sheet 1 and the grating structure 2.

[0047] In some embodiments, a first anti-reflection layer is provided on at least one side of the first cover plate 31 in the thickness direction, and the first anti-reflection layer is laminated to the first cover plate 31. Exemplarily, the first anti-reflection layer is an anti-reflection film, which may be coated to cover at least one side of the first cover plate 31 in the thickness direction. That is, the first anti-reflection layer may be provided on the side of the first cover plate 31 closest to the optical waveguide sheet 1, on the side of the first cover plate 31 facing away from the optical waveguide sheet 1, or on both sides of the first cover plate 31 in the thickness direction.

[0048] It should be noted that when the first anti-reflection layer is positioned on the side of the first cover plate 31 facing away from the optical waveguide sheet 1, the transmittance of light entering the first cover plate 31 from the outside increases. When the first anti-reflection layer is positioned on the side of the first cover plate 31 facing closer to the optical waveguide sheet 1, the transmittance of light exiting the first cover plate 31 from the optical waveguide sheet 1 increases. When the first anti-reflection layer is positioned on both the side of the first cover plate 31 facing away from the optical waveguide sheet 1 and the side facing closer to the optical waveguide sheet 1, the transmittance of light entering the first cover plate 31 from the outside and the transmittance of light exiting the first cover plate 31 from the optical waveguide sheet 1 both increase. Furthermore, the anti-reflection coating also provides UV protection, reducing the effects of UV radiation on the grating.

[0049] like Figure 2 As shown, in some embodiments, the grating structure 2 is formed on the second surface 102 of the optical waveguide sheet 1, that is, the in-coupling grating 21 and the out-coupling grating 22 are both disposed on the second surface 102 of the optical waveguide sheet 1. The protective member 3 includes at least a second cover plate 32, which is disposed outside the second surface 102 of the optical waveguide sheet 1. The edges of the second cover plate 32 are sealed to the second surface 102 of the optical waveguide sheet 1 via a colloid 8 to form a second sealed cavity 5. The second cover plate 32 can at least completely cover the grating structure 2, so that after the second cover plate 32 and the optical waveguide sheet 1 are sealed, the grating structure 2 is located within the second sealed cavity 5.

[0050] The second cover plate 32 is a light-transmitting cover plate, such as a glass cover plate or a resin cover plate. This allows light from the outside to pass through the waveguide plate 1, the second cover plate 32, the optical lens 6, and other components to reach the user's eyes for imaging, while protecting the optical waveguide plate 1. The first sealed cavity 4 is in a vacuum state or filled with a non-oxygen-containing gas to prevent the grating structure 2 from undergoing a photocatalytic reaction with oxygen in the air during light exposure, which could affect optical performance.

[0051] Preferably, the second cover plate 32 covers the entire surface of the second surface 102 of the optical waveguide sheet 1. The edges of the second cover plate 32 and the edges of the optical waveguide sheet 1 are sealed by a circle of colloid 8 to form a second sealed cavity 5. The second sealed cavity 5 is evacuated or filled with a non-oxygen-containing gas, thereby improving the protection effect of the second cover plate 32 on the entire optical waveguide sheet 1 and the grating structure 2.

[0052] In some embodiments, a second anti-reflection layer is provided on at least one side of the second cover plate 32 in the thickness direction, and the second anti-reflection layer is laminated to the second cover plate 32. Exemplarily, the second anti-reflection layer is an anti-reflection film, which may be coated to cover at least one side of the second cover plate 32 in the thickness direction. That is, the second anti-reflection layer may be provided on the side of the second cover plate 32 close to the optical waveguide sheet 1, on the side of the second cover plate 32 facing away from the optical waveguide sheet 1, or on both sides of the second cover plate 32 in the thickness direction.

[0053] It should be noted that when the second anti-reflection layer is disposed on the side of the second cover plate 32 facing away from the optical waveguide sheet 1, the transmittance of light exiting the second cover plate 32 increases. When the second anti-reflection layer is disposed on the side of the second cover plate 32 closer to the optical waveguide sheet 1, the transmittance of light exiting the optical waveguide sheet 1 toward the second cover plate 32 increases. When the second anti-reflection layer is disposed on both the side of the second cover plate 32 facing away from the optical waveguide sheet 1 and the side closer to the optical waveguide sheet 1, the transmittance of light exiting the second cover plate 32 and the transmittance of light exiting the optical waveguide sheet 1 toward the second cover plate 32 both increase. Furthermore, the anti-reflection coating also provides UV protection, reducing the effects of UV radiation on the grating.

[0054] It should be noted that the setting of the protective member 3 can be combined with the description of the above embodiment and the following Figure 1 and Figure 2 In the solution shown, a first cover plate 31 and a second cover plate 32 are respectively provided on two opposite sides of the optical waveguide plate 1 in the thickness direction.

[0055] like Figure 3As shown, in some embodiments, the grating structure 2 includes an in-coupling grating 21 and an out-coupling grating 22, and the in-coupling grating 21 and the out-coupling grating 22 are formed on opposite sides of the optical waveguide plate 1. That is, the in-coupling grating 21 is formed on the first surface 101, and the out-coupling grating 22 is formed on the second surface 102; alternatively, the in-coupling grating 21 is formed on the second surface 102, and the out-coupling grating 22 is formed on the first surface 101. The protective member 3 includes a first cover plate 31 and a second cover plate 32. The first cover plate 31 is disposed outside the first surface 101 of the optical waveguide plate 1, and the second cover plate 32 is disposed outside the second surface 102 of the optical waveguide plate 1. The first cover plate 31 and the optical waveguide plate 1 are bonded together by a colloid 8 to form a first sealed cavity 4. The second cover plate 32 and the optical waveguide plate 1 are bonded together by a colloid 8 to form a second sealed cavity 5. Both the first sealed cavity 4 and the second sealed cavity 5 are in a vacuum state or filled with a non-oxygen-containing gas.

[0056] A first anti-reflection layer is provided on at least one side of the first cover plate 31 in the thickness direction, and the first anti-reflection layer is laminated to the first cover plate 31. A second anti-reflection layer is provided on at least one side of the second cover plate 32 in the thickness direction, and the second anti-reflection layer is laminated to the second cover plate 32. The first anti-reflection layer and the second anti-reflection layer are used to increase the transmittance of light.

[0057] It should be noted that the arrangement of the first cover plate 31 and the second cover plate 32 in the embodiment of the present application is the same as the specific solution in the above embodiment, and the description of the above embodiment can be combined with the above embodiment. Figure 1 and Figure 2 The solution shown is a specific solution in which a first cover plate 31 and a second cover plate 32 are respectively provided on two opposite sides in the thickness direction of the optical waveguide plate 1 .

[0058] It should be understood that the first cover plate 31 and the first sealed cavity 4 are used to protect the in-coupling grating 21 and / or the out-coupling grating 22 formed on the first surface 101 of the optical waveguide plate 1, and the second cover plate 32 and the second sealed cavity 5 are used to protect the in-coupling grating 21 and / or the out-coupling grating 22 formed on the second surface 102 of the optical waveguide plate 1.

[0059] In the embodiment of the present application, the optical waveguide sheet 1, first cover plate 31, and second cover plate 32 can be made of glass, resin, or polymer materials. Glass and resin materials are low-cost and readily available; polymer materials are lightweight and resistant to impact or collision. For example, the polymer material can be polycarbonate (PC, a polymer material).

[0060] The colloid 8 can be made of optical adhesive such as UV adhesive, OCR adhesive, or a mixture of optical adhesive and structural adhesive, which can ensure both optical performance and sealing performance to prevent oxygen from entering the sealed cavity. When the colloid 8 is used to seal the first sealed cavity 4 and the second sealed cavity 5, it is necessary to operate in a non-oxidizing environment to prevent oxygen from entering the sealed cavity.

[0061] When the sealed cavity is filled with a non-oxygen-containing gas, the pressure difference inside and outside the optical waveguide assembly can be balanced, thereby improving the stability of the structure. The non-oxygen-containing gas can be selected from non-oxidizing gases such as helium, argon, neon, nitrogen, krypton, xenon, carbon dioxide, and their combinations. Among them, the purity of the non-oxygen-containing gas is greater than 99.999%, which can avoid the residual impurities (such as O2, H2O). The anti-ultraviolet radiation oxidation performance of the optical waveguide assembly is further improved. Preferably, considering the factors of thermal expansion and contraction, inert gases such as helium, argon, neon, krypton, xenon, or nitrogen can be preferred, which have high purity and small thermal expansion, thereby improving the stability of the optical waveguide assembly.

[0062] The optical waveguide assembly of the embodiment of the present application is provided with a protective member 3 on one side of the optical waveguide sheet 1 where the grating structure 2 is formed. The protective member 3 and the optical waveguide sheet 1 are glued together to form a sealed cavity. The sealed cavity is in a vacuum state or filled with a non-oxygen-containing gas, so that the optical waveguide assembly can effectively block damage to the grating caused by ultraviolet radiation, thereby improving the stability and optical performance of the optical waveguide assembly.

[0063] The embodiment of the present application provides a lens module, which is applied to smart glasses. Smart glasses include AR glasses, AI glasses, VR glasses, etc. The lens module includes an optical waveguide component and an optical lens 6. It should be noted that the lens module has a relative near-eye side and far-eye side in its thickness direction, wherein the near-eye side refers to the side of the lens module close to the user's eye when the lens module is installed on the smart glasses and the user wears the smart glasses, and conversely, the far-eye side refers to the side of the lens module away from the user's eye. The structure of the optical waveguide component can be as follows: Figure 1 、 Figure 2 、 Figure 3 Any form of. Figure 4 Only the optical waveguide components are shown. Figure 1 The lens module of the structure shown.

[0064] It should be noted that the first surface 101 of the optical waveguide plate 1 corresponds to the far-eye side and the second surface 102 corresponds to the near-eye side. Figure 1 As shown, the first surface 101 of the optical waveguide plate 1 is formed at the same time on the far-eye side; the coupling-in grating 21 and the coupling-out grating 22 can also be as follows Figure 2As shown, the second surface 102 of the optical waveguide plate 1 near the eye is formed at the same time; the coupling-in grating 21 and the coupling-out grating 22 can also be as follows Figure 3 As shown, a first surface 101 on the far-eye side and a second surface 102 on the near-eye side of the optical waveguide plate 1 are formed respectively.

[0065] like Figure 4 As shown, the optical lens 6 is disposed on the near-eye side of the optical waveguide assembly, wherein the optical lens 6 includes but is not limited to at least one of a diopter lens and a plano lens, and the diopter lens is, for example, a myopia lens or a hyperopia lens.

[0066] In some embodiments, the lens module may also be provided with a first coating layer, which is provided on the far-eye side of the optical waveguide assembly. The first coating layer is formed with at least a blue light protection structure, such as an anti-blue light coating. Specifically, the external light incident on the lens module may contain some blue light, which will be reflected by the first coating layer. Other light in the external light except the blue light will sequentially pass through the first coating layer, the optical waveguide assembly, and the optical lens 6 to enter the user's field of view and form an image. However, since the blue light in the external light has already been reflected by the first coating layer, no double images, ghost images, or rainbow patterns will be produced.

[0067] In some embodiments, a second coating layer is provided on the side of the optical lens 6 away from the optical waveguide assembly. For example, the second coating layer can be laminated to the surface of the optical lens 6 near the near-eye side to protect the surface of the optical lens 6 near the near-eye side, preventing the optical lens 6 from being scratched and damaged, thereby improving the durability of the optical lens 6.

[0068] The present application also provides smart glasses, comprising a lens module, a frame assembly, a temple assembly, and an optical-mechanical module 7. The components of the smart glasses are described in detail below. The temple assembly is connected to the frame assembly and extends toward the near-eye side of the lens module. The lens module is specifically any of the lens modules provided in the present application, and is mounted on the frame assembly. The optical-mechanical module 7 is connected to at least one of the frame assembly and the temple assembly and is configured to correspond to the lens module. The optical-mechanical module 7 is configured to output an optical signal to the lens module.

[0069] Specifically, the optical module 7 is arranged corresponding to the coupling grating 21 and is used to output the optical signal to the coupling grating 21, and the lens module is configured to conduct the optical signal incident on the coupling grating 21 to the coupling grating 22 and output it into the eye.

[0070] In an embodiment of the present application, a protective member 3 is provided on one side of the optical waveguide sheet 1 where the grating structure 2 is formed. The protective member 3 and the optical waveguide sheet 1 are glued together to form a sealed cavity. The sealed cavity is in a vacuum state or filled with a non-oxygen-containing gas, thereby effectively preventing damage to the grating caused by ultraviolet radiation and improving the stability and optical performance of the optical waveguide assembly.

[0071] The foregoing is merely a preferred embodiment of the present application and is not intended to limit the present application. Persons skilled in the art will readily appreciate that various modifications and variations are possible. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of the present application are intended to be within the scope of protection of the present application.

Claims

1. An optical waveguide component, characterized in that: The optical waveguide assembly comprises: An optical waveguide plate (1) having a first surface (101) and a second surface (102) opposite to each other; a grating structure (2) formed on the first surface (101) and / or the second surface (102) of the optical waveguide plate (1); A protective member (3) is provided at least on one side of the optical waveguide plate (1) where the grating structure (2) is formed; The protective member (3) and the optical waveguide plate (1) are glued together to form a sealed cavity, and the sealed cavity is in a vacuum state or filled with a non-oxygen-containing gas.

2. The optical waveguide assembly according to claim 1, wherein The grating structure (2) is formed on the first surface (101) of the optical waveguide plate (1); The protective member (3) comprises at least a first cover plate (31), the first cover plate (31) being arranged outside the first surface (101) of the optical waveguide sheet (1), the first cover plate (31) and the optical waveguide sheet (1) being glued together to form a first sealed cavity (4), the first sealed cavity (4) being in a vacuum state or filled with a non-oxygen-containing gas.

3. The optical waveguide assembly according to claim 2, wherein: A first anti-reflection layer is provided on at least one side of the first cover plate (31) in the thickness direction, and the first anti-reflection layer is laminated to the first cover plate (31).

4. The optical waveguide assembly according to claim 1, wherein The grating structure (2) is formed on the second surface (102) of the optical waveguide plate (1); The protective member (3) comprises at least a second cover plate (32), the second cover plate (32) being arranged outside the second surface (102) of the optical waveguide sheet (1), the second cover plate (32) and the optical waveguide sheet (1) being glued together to form a second sealed cavity (5), the second sealed cavity (5) being in a vacuum state or filled with a non-oxygen-containing gas.

5. The optical waveguide assembly according to claim 4, wherein A second anti-reflection layer is provided on at least one side of the second cover plate (32) in the thickness direction, and the second anti-reflection layer is laminated to the second cover plate (32).

6. The optical waveguide assembly according to claim 1, wherein The grating structure (2) includes an in-coupling grating (21) and an out-coupling grating (22), and the in-coupling grating (21) and the out-coupling grating (22) are respectively formed on a first surface (101) and a second surface (102) of the optical waveguide plate (1); The protective member (3) comprises a first cover plate (31) and a second cover plate (32), wherein the first cover plate (31) is arranged outside the first surface (101) of the optical waveguide sheet (1), and the second cover plate (32) is arranged outside the second surface (102) of the optical waveguide sheet (1), the first cover plate (31) and the optical waveguide sheet (1) are glued together to form a first sealed cavity (4), and the first sealed cavity (4) is in a vacuum state or filled with a non-oxygen-containing gas, and the second cover plate (32) and the optical waveguide sheet (1) are glued together to form a second sealed cavity (5), and the second sealed cavity (5) is in a vacuum state or filled with a non-oxygen-containing gas.

7. The optical waveguide assembly according to claim 6, wherein: A first anti-reflection layer is provided on at least one side of the first cover plate (31) in the thickness direction, and the first anti-reflection layer is bonded to the first cover plate (31); a second anti-reflection layer is provided on at least one side of the second cover plate (32) in the thickness direction, and the second anti-reflection layer is bonded to the second cover plate (32).

8. The optical waveguide assembly according to any one of claims 1 to 7, characterized in that: The non-oxygen-containing gas is at least one of helium, argon, neon, nitrogen, krypton, xenon, and carbon dioxide.

9. The optical waveguide assembly according to any one of claims 1 to 7, characterized in that: The purity of the non-oxygen-containing gas is greater than 99.999%.

10. A lens module, characterized in that: The lens module comprises: The optical waveguide assembly according to any one of claims 1 to 9, having a near-eye side and a far-eye side opposite to each other; An optical lens (6) is arranged on the near-eye side of the optical waveguide component.

11. A pair of smart glasses, characterized in that: The smart glasses include: A frame assembly and a temple assembly connected to the frame assembly; The lens module according to claim 10, wherein the lens module is mounted on the frame assembly; An optical machine module (7) is connected to at least one of the frame assembly and the temple assembly and is arranged corresponding to the lens module, and the optical machine module (7) is used to output an optical signal to the lens module.

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