Lens module and ar glasses

Abstract

The present application relates to the field of near-eye display devices. Disclosed are a plurality of lens modules and AR glasses. A lens module comprises: an optical waveguide assembly, at least comprising an optical waveguide lens and a first anti-reflection element. A first and a second target area are formed on the surface of a side of the optical waveguide lens, a first grating structure being provided in the first target area, and the first anti-reflection element being arranged corresponding to the second target area. A first abutting surface is formed on the side of the first anti-reflection element opposite to the first grating structure, a first target included angle greater than 16 degrees being formed between the first abutting surface and the optical waveguide lens. By means of limiting the angle of inclination of the side of the first anti-reflection element opposite to the first grating structure, while the function of the grating structure is normal and the light transmittance is not affected, it is ensured that the diffraction generated by light passing through the lens module is reduced, thereby improving the clarity and use experience experienced by users viewing the real world with AR glasses.

Description

Lens module and AR glasses TECHNICAL FIELD

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

[0002] With the progress of optical display technology, new generation of near-eye display devices such as AR (Augmented Reality) devices are gradually emerging, for example, AR glasses. At present, the light waveguide scheme has gradually become the mainstream AR scheme, that is, the lens module in the AR glasses can generate virtual projection information through the light waveguide display, and can also transmit the light rays of the real world like ordinary glasses lenses, so that the images of the real world and the virtual projection information are superimposed into the user's field of view to realize augmented reality display.

[0003] As the inventor knows, a design scheme of a lens module in AR glasses, the light waveguide lens includes a grating area configured to set a grating and a non-grating area configured not to set a grating, wherein an anti-reflection film is coated in the non-grating area to increase the light transmittance of the light waveguide lens in the non-grating area.

[0004] However, this design scheme will form a certain transition zone between the grating area (without coating) and the non-grating area (with coating), and the transition zone will cause diffraction when the external light transmits through the lens module, so that the user wearing the AR glasses will have blurred vision when looking at the outside world, especially when looking at text or horizontal stripes.

[0005] In addition, the anti-reflection film includes a plurality of anti-reflection film units, wherein the high refractive index film layer and the low refractive index film layer in the plurality of anti-reflection film units are alternately arranged along the thickness direction of the light waveguide lens. Due to the process of coating the anti-reflection film unit, the edges of the anti-reflection film unit are prone to have uneven thickness, especially in the anti-reflection film unit, which causes the high refractive index film layer to produce split interference on the transmitted light. The above two problems both cause the user to have unclear vision when using the AR glasses to look at the outside world and poor user experience.

[0006] SUMMARY

[0007] The embodiments of the present application provide a lens module and AR glasses, which aims to ensure the normal function of the grating structure, and under the premise of not affecting the overall light transmittance of the lens module, to reduce the diffraction caused by the external light passing through the lens module, and to improve the clarity and user experience of the user using the AR glasses to view the real world.

[0008] In a first aspect, the lens module of the first AR glasses provided by the embodiments of the present application at least includes:

[0009] The optical waveguide assembly at least comprises an optical waveguide lens and a first antireflection element, one side surface of the optical waveguide lens is formed with a first target area and a second target area, the optical waveguide lens is provided with a first grating structure at the first target area, and the first antireflection element is arranged corresponding to the second target area.

[0010] The first antireflection element is formed with a first abutment surface on the side opposite to the first grating structure, the first abutment surface forms a first target angle with the optical waveguide lens, and the angle of the first target angle is greater than 16 degrees.

[0011] In a second aspect, the embodiments of the present application provide a second lens module of AR glasses, which at least comprises:

[0012] The optical waveguide assembly at least comprises an optical waveguide lens and a first antireflection element, one side surface of the optical waveguide lens is formed with a first target area and a second target area, the optical waveguide lens is provided with a first grating structure at the first target area, and the first antireflection element is arranged corresponding to the second target area.

[0013] The first antireflection element comprises a plurality of antireflection film units stacked in the thickness direction of the optical waveguide lens, the side of the plurality of antireflection film units close to the first grating structure is formed with a sub-abutment surface, the sub-abutment surfaces form a second abutment surface, the second abutment surface forms a second target angle with the optical waveguide lens, and the angle of the second target angle is greater than 16 degrees.

[0014] In a third aspect, the embodiments of the present application provide a third lens module of AR glasses, which at least comprises:

[0015] The optical waveguide assembly at least comprises an optical waveguide lens and a first antireflection element, one side surface of the optical waveguide lens is formed with a first target area and a second target area, the optical waveguide lens is provided with a first grating structure at the first target area, and the first antireflection element is arranged corresponding to the second target area.

[0016] The first antireflection element comprises a plurality of antireflection film units stacked in the thickness direction of the optical waveguide lens, the plurality of antireflection film units comprise at least one first type film and at least one second type film, and the at least one first type film and the at least one second type film are arranged alternately in the thickness direction of the optical waveguide lens, the refractive index of the first type film is less than 2.5, the refractive index of the second type film is less than 1.45, and the refractive index of the first type film is greater than that of the second type film.

[0017] The thickness of the first type film is equal to λ / 4*n1, the thickness of the second type film is equal to λ / 4*n2, λ is a specific wavelength corresponding to the antireflection film unit, n1 is the refractive index of the first type film, and n2 is the refractive index of the second type film.

[0018] In a fourth aspect, the embodiments of the present application further provide an AR glasses, which comprises:

[0019] Any one of the lens module provided by the embodiment of the present application has opposite near-eye side and far-eye side;

[0020] The frame module includes a frame assembly and a temple assembly, the lens module is installed on the frame assembly, and the temple assembly is connected to the frame assembly and extends towards the near-eye side of the lens module;

[0021] The optical-mechanical module is connected to at least one of the frame assembly and the temple assembly and is arranged corresponding to the lens module.

[0022] In summary, the embodiment of the present application provides a plurality of lens modules and AR glasses. One lens module includes an optical waveguide assembly, at least including an optical waveguide lens and a first anti-reflection element. One side surface of the optical waveguide lens forms 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 first anti-reflection element is arranged corresponding to the second target area. The first anti-reflection element forms a first abutment surface relative to one side of the first grating structure. The first abutment surface forms a first target included angle with the optical waveguide lens, and the angle of the first target included angle is greater than 16 degrees. The lens module and AR glasses provided by the embodiment of the present application limit the inclination angle of the first anti-reflection element relative to one side of the first grating structure, ensure that the grating structure functions normally, and do not affect the overall light transmittance of the lens module. In this way, the diffraction caused by external light passing through the lens module is reduced, thereby improving the clarity and user experience of using the AR glasses to view the real world. BRIEF DESCRIPTION OF DRAWINGS

[0023] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following will briefly introduce the drawings needed to be used in the embodiment description. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can also be obtained according to these drawings without creative labor for those skilled in the art.

[0024] FIG. 1 is a structural schematic diagram of a first embodiment of a lens module provided by the present application;

[0025] FIG. 2 is a structural schematic diagram of a second embodiment of a lens module provided by the present application;

[0026] FIG. 3 is a structural schematic diagram of a third embodiment of a lens module provided by the present application;

[0027] FIG. 4 is an optical effect schematic diagram of a lens module of an AR glass;

[0028] FIG. 5 is an optical effect schematic diagram of a lens module of another AR glass

[0029] FIG. 6 is a structural schematic diagram of a fourth embodiment of a lens module provided by the present application;

[0030] Fig. 7 is a structural schematic diagram of a fifth embodiment of a lens module according to an embodiment of the present application;

[0031] Fig. 8 is a schematic diagram of optical effects of a lens module of another AR glass;

[0032] Fig. 9 is a structural schematic diagram of a sixth embodiment of a lens module according to an embodiment of the present application;

[0033] Fig. 10 is a structural schematic diagram of a seventh embodiment of a lens module according to an embodiment of the present application;

[0034] Fig. 11 is a structural schematic diagram of an eighth embodiment of a lens module according to an embodiment of the present application;

[0035] Fig. 12 is a structural schematic diagram of a ninth embodiment of a lens module according to an embodiment of the present application;

[0036] Fig. 13 is a structural schematic diagram of a tenth embodiment of a lens module according to an embodiment of the present application;

[0037] Fig. 14 is a structural schematic diagram of an AR glass according to an embodiment of the present application.

[0038] Fig. 14 is a structural schematic diagram of an AR glass according to an embodiment of the present application. DETAILED DESCRIPTION

[0039] The technical solutions of the embodiments of the present application will be described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments of the present application, other embodiments obtained by those of ordinary skill in the art without creative labor fall within the scope of the present application. The flowcharts shown in the drawings are only exemplary and do not necessarily include all the contents and operations / steps, nor do they necessarily have to be executed in the order described. For example, some operations / steps can be further decomposed, combined or partially combined, so that the actual execution order may be changed 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 person skilled in the art can easily think of various equivalent modifications or replacements within the technical range 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 should be subject to the protection scope of the claims.

[0040] Please refer to FIG. 1 and FIG. 2, FIG. 1 is a structural schematic diagram of a first embodiment of a lens module provided by an embodiment of the present application, and FIG. 2 is a structural schematic diagram of a second embodiment of a lens module provided by an embodiment of the present application.

[0041] As shown in FIG. 1 and FIG. 2, an embodiment of the present application provides a lens module 10 of an AR glasses, it is necessary to point out that the lens module 10 has opposite near-eye side and far-eye side in its thickness direction, wherein the near-eye side refers to the side of the lens module 10 close to the user's eye when the lens module 10 is installed on the AR glasses and the user wears the AR glasses, and on the contrary, the far-eye side refers to the side of the lens module 10 away from the user's eye.

[0042] Specifically, the lens module 10 at least includes a light waveguide assembly 11, and the light waveguide assembly 11 at least includes a light waveguide lens 111 and a first anti-reflection member 112, wherein the light 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, one side surface of the light waveguide lens 111 is formed with a first target area 1111 and a second target area 1112, the light waveguide lens 111 is provided with a first grating structure 1115 at the first target area 1111, and the first anti-reflection member 112 is provided corresponding to the second target area 1112.

[0043] The function of the first grating structure 1115 is described as follows. In some examples, the first grating structure 1115 includes an in-coupling grating and an out-coupling grating, i.e., the in-coupling grating and the out-coupling grating are disposed on the same side of the optical waveguide lens 111, and the optical waveguide assembly 11 is configured to conduct light input from the in-coupling grating to the out-coupling grating and output. In the AR glasses, the optical-mechanical module 30 of the AR glasses is disposed corresponding to the in-coupling grating and is configured to output an optical signal to the in-coupling grating, and the optical waveguide lens 111 conducts the optical signal input from the in-coupling grating to the out-coupling grating and outputs, so that the optical signal output by the optical-mechanical module 30 enters the field of view of the user.

[0044] The in-coupling grating and / or the out-coupling grating can be formed on the first surface 115 of the optical waveguide lens 111 far from the eye as shown in FIG. 1, or can be formed on the second surface 116 of the optical waveguide lens 111 close to the eye as shown in FIG. 2. It should be understood that when the in-coupling grating is disposed on the first surface 115, the in-coupling grating is a reflective grating, and when the in-coupling grating is disposed on the second surface 116, the in-coupling grating is a transmissive grating, and the same applies to the out-coupling grating.

[0045] It should also be noted that the first antireflection member 112 is configured to improve the light transmittance of the second target area 1112, so that the light loss caused when the light from the outside of the AR glasses enters the optical waveguide lens 111 from the surface of the second target area 1112 is reduced.

[0046] For example, the first antireflection member 112 is an antireflection film (or an antireflection coating), which can 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 antireflection film and to prevent the first target area 1111 where the first grating structure 1115 is formed from being coated with the antireflection film, the surface of the optical waveguide lens 111 can be coated by shielding (i.e., using a jig to shield the first target area 1111 during the coating operation to prevent the antireflection film from being coated on the first target area 1111).

[0047] For example, the effect of the antireflection film is that, in the visible light range, the reflectivity of incident light with an incident angle of 0-30 degrees entering the antireflection film is less than 5%.

[0048] It should be understood that, taking the first antireflection member 112 as an antireflection film for example, since the first grating structure 1115 is a structure formed by concave-convex on the light waveguide lens 111, if the antireflection film is covered on the surface of the first grating structure 1115, the thickness of the antireflection film is not uniform, and the antireflection film will affect the optical properties of the first grating structure 1115, therefore, the lens module 10 provided by the present application limits the coverage range of the first antireflection member 112 within the second target area 1112, without covering the first target area 1111.

[0049] By arranging the partially covered first antireflection member 112 on the side of the light waveguide assembly 11 where the first grating structure 1115 is formed, the overall light transmittance of the lens module 10 is improved, especially the light loss caused when the light from the outside of the AR glasses enters the light waveguide lens 111 from the surface of the second target area 1112 is reduced. Moreover, the coverage range of the first antireflection member 112 is limited within the second target area 1112, without covering the first target area 1111, which can improve the overall light transmittance of the lens module 10 while ensuring the normal function of the first grating structure 1115.

[0050] As shown in FIG. 1 and FIG. 2, in some embodiments, the first antireflection member 112 is formed with a first abutment surface 1121 on the side opposite to the first grating structure 1115, the first abutment surface 1121 forms a first target angle θ1 with the light waveguide lens 111, and the angle of the first target angle θ1 is greater than 16 degrees.

[0051] It should be understood that the first abutment surface 1121 refers to the side surface of the first antireflection member 112 opposite to the side of the first grating structure 1115, and the first target angle θ1 refers to the angle between the first abutment surface 1121 and the inner side of the light waveguide lens 111.

[0052] In which, the angle of the first target angle θ1 is greater than 16 degrees, and in some embodiments, the angle of the first target angle θ1 should be as large as possible.

[0053] It should be noted that, since the plating process including shading or other schemes will form a certain transition zone between the first target area 1111 (without plating the first antireflection member 112) and the second target area 1112 (plating the first antireflection member 112), the transition zone is in the form of an inclined surface, and the external light passing through the lens module 10 will produce light diffraction near the transition zone, which will cause visual blurring when the user wears the AR glasses 1 to look at the outside, especially when looking at text or horizontal stripes.

[0054] Please refer to FIG. 3 and FIG. 4, FIG. 3 is a schematic diagram of the optical effect of a lens module of an AR glasses, and FIG. 4 is a schematic diagram of the optical effect of another lens module of an AR glasses.

[0055] As shown in FIG. 3, the first antireflection member 112 forms a first abutment surface 1121 relative to one side of the first grating structure 1115, i.e. a transition zone corresponding to the first abutment surface 1121 is formed between the first target area 1111 and the second target area 1112.

[0056] The light rays a, b, c, d, e that are vertically incident relative to the lens module 10 are described: since the refractive index of the first antireflection member 112 is greater than the refractive index of air, and the first abutment surface 1121 is beveled, the optical path of the light rays a, b, c, d, e from the outside of the AR glasses 1 to the user's eyes through the lens module 10 is not the same, thereby causing diffraction when the light rays from the outside of the AR glasses 1 pass through the lens module 10, and thus the user wearing the AR glasses 1 will see a blurred vision when looking at the outside world, especially when looking at text or horizontal stripes.

[0057] The first antireflection member 112 is taken as an antireflection film for description: for the existing antireflection film, the antireflection film includes a plurality of antireflection film units 1123 stacked along the thickness direction of the optical waveguide lens 111, and the transmittance of each antireflection film unit 1123 is different, and generally, the antireflection film units 1123 with high refractive index and the antireflection film units 1123 with low refractive index are alternately stacked.

[0058] Further description, each antireflection film unit 1123 has a specific wavelength corresponding thereto, and a single antireflection film unit 1123 is used to increase the transmittance of a specific wavelength. Specifically, the thickness of each antireflection film unit 1123 is usually one quarter of the specific wavelength, when the light of the specific wavelength passes through the antireflection film unit 1123, a part of the light is reflected on the surface of the antireflection film unit 1123 to generate first reflected light, and part of the light enters the antireflection film unit 1123 and is reflected on the other side of the antireflection film unit 1123 to generate second reflected light, and the wavelengths of the first reflected light and the second reflected light are also the specific wavelength. When the first reflected light and the second reflected light recombine, since the thickness of the antireflection film unit 1123 is one quarter of the specific wavelength, the path difference of the first reflected light and the second reflected light is exactly half of the specific wavelength, so that the phases of the first reflected light and the second reflected light are opposite, resulting in destructive interference, thereby greatly reducing the intensity of the first reflected light and the second reflected light, and the reduction of the intensity of the first reflected light and the second reflected light means that more light transmits through the optical waveguide assembly 11, thereby improving the overall light transmittance of the optical waveguide assembly 11.

[0059] Taking FIG. 4 as an example, the first anti-reflection member 112 includes anti-reflection film units s10, s20, s30, s40 stacked along the thickness direction of the optical waveguide lens 111, the thicknesses of which are d10, d20, d30, d40 in sequence, and the refractive indexes of which are n10, n20, n30, n40 in sequence, and the refractive index of air is n00, so the optical path experienced by light rays a, b, c, d, e from one side to the other side of the first anti-reflection member 112 can be obtained as follows:

[0060] The optical path corresponding to light ray a is la=n00*(d10+d20+d30+d40);

[0061] The optical path corresponding to light ray b is lb=n10*d10+n00*(d20+d30+d40);

[0062] The optical path corresponding to light ray c is lc=n10*d10+n20*d20+n00*(d30+d40);

[0063] The optical path corresponding to light ray d is ld=n10*d10+n20*d20+n30*d30+n00*d40;

[0064] The optical path corresponding to light ray e is le=n10*d10+n20*d20+n30*d30+n40*d40.

[0065] Based on the fact that the transmittance of each anti-reflection film unit 1123 is different, there is a difference in the optical path corresponding to each light ray, for example, the difference in the optical path between adjacent light rays a and b is (n10-n00)*d10, and when the difference in the optical path between adjacent light rays is an integer multiple of the half wavelength of the light rays, constructive or destructive interference occurs between adjacent light rays, forming interference fringes, which distorts the originally clear external image and produces a transition zone with visual blur, so that the user wearing the AR glasses 1 will see the external world with visual blur.

[0066] Therefore, in some embodiments, the angle of the first target included angle θ1 should be as large as possible, and the angle of the first target included angle θ1 should be at least greater than 16 degrees. It should be noted that the larger the angle of the first target included angle θ1, the smaller the first abutment surface 1121 and the transition zone formed by the first anti-reflection member 112, the less the distorted part of the external image, and the lower the effect of visual blur.

[0067] It is further stated that the definition of the angle of the first target included angle θ1 can be determined according to the inclination angle formed by at least two anti-reflection film units 1123 in the first anti-reflection member 112, specifically, the inclination angle formed by any two adjacent anti-reflection film units 1123 is taken as the angle of the first target included angle θ1.

[0068] The derivation process of the angle of the first target included angle θ1 greater than 16 degrees in the embodiment of the application will be described in detail below with reference to FIG. 4.

[0069] As shown in FIG. 4, the anti-reflection film includes a plurality of anti-reflection film units 1123 stacked along the thickness direction of the optical waveguide lens 111. Taking the anti-reflection film unit s10 with a thickness d10 and a refractive index n10 as an example: considering two oblique incident light rays f and g, the maximum optical path difference of the light rays f and g from one side of the anti-reflection film unit s10 to the other side is (L / sinθ1)*(n10-n00) with the first target included angle θ1 as the variable.

[0070] As described above in the principle of the anti-reflection film unit 1123, the thickness of the anti-reflection film unit s10 is one quarter of a specific wavelength. Considering the wavelengths of red light, green light and blue light corresponding to the three primary colors are 700 nm, 550 nm and 460 nm respectively, and nblue is the refractive index of blue light, which is the shortest wavelength of the color light, in order to ensure that the maximum optical path difference of the red light, green light and blue light from one side of the anti-reflection film unit s10 to the other side does not cause destructive interference, the thickness of the anti-reflection film unit s10 and the maximum optical path difference of the light rays f and g from one side of the anti-reflection film unit s10 to the other side are calculated using the wavelength corresponding to the blue light. It can be obtained that the angle of the first target included angle θ1 should be greater than 16 degrees. Under the condition that the angle of the first target included angle θ1 is greater than 16 degrees, the diffraction caused by external light rays passing through the lens module 10 can be reduced without affecting the anti-reflection of the anti-reflection film unit 1123, and the clarity and user experience of using the AR glasses 1 to watch the real world can be improved.

[0071] Please refer to FIG. 5, which is a structural schematic diagram of a fourth embodiment of the lens module 10 provided by an embodiment of the application.

[0072] As shown in FIG. 5, in some embodiments, the first anti-reflection member 112 includes a plurality of anti-reflection film units 1123 stacked on one side in the thickness direction of the optical waveguide lens 111, wherein the plurality of anti-reflection film units 1123 form a sub-adjacent surface 1124 close to one side of the first grating structure 1115, the sub-adjacent surface 1124 constitutes a second adjacent surface 1122, the second adjacent surface 1122 forms a second target included angle θ2 with the optical waveguide lens 111, and the angle of the second target included angle θ2 is greater than 16 degrees.

[0073] The sub-adjacent surface 1124 is a side surface of the single anti-reflection film unit 1123 close to the first grating structure 1115, the second adjacent surface 1122 is a side surface formed by splicing the plurality of sub-adjacent surfaces 1124, and the angle of the second target angle θ2 can be determined according to the inclination angle formed by the at least two anti-reflection film units 1123 in the first anti-reflection member 112, specifically, the inclination angle formed by any two adjacent anti-reflection film units 1123 is taken as the angle of the second target angle θ2.

[0074] It should be understood that the first target angle θ1 and the second target angle θ2 can refer to the same angle. In particular, under the premise that the first anti-reflection member 112 includes a plurality of anti-reflection film units 1123 stacked on the side corresponding to the first grating structure 1115, the first target angle θ1 and the second target angle θ2 both refer to the angle between the side surface formed by splicing the plurality of sub-adjacent surfaces 1124 and the optical waveguide lens 111.

[0075] Therefore, the derivation process and beneficial effects of the angle of the second target angle θ2 greater than 16 degrees in the embodiments of the present application can refer to the description of the first target angle θ1, which will not be repeated here.

[0076] From the production point of view, the angle limiting process of the first target angle θ1 and / or the second target angle θ2 in the embodiments of the present application is described: in addition to using better edge coating process, or improving the coating jig, after the first anti-reflection member 112 is coated, the side of the first anti-reflection member 112 relative to the first grating structure 1115 can be trimmed by photolithography, cutting and other processes to limit the angle of the first target angle θ1 and / or the second target angle θ2 to be greater than 16 degrees.

[0077] It should be noted that the first protective component 12 is arranged on the side of the optical waveguide lens 111 forming the first grating structure 1115, and in some embodiments, the first protective component 12 covers the first grating structure 1115 and the first anti-reflection member 112, aiming to protect the first grating structure 1115 formed on the optical waveguide lens 111. It should be understood that the grating structure belongs to a fine structure, and when the grating structure is worn, it will damage the optical properties of the grating, therefore, the first protective component 12 can improve the durability of the lens module 10.

[0078] Please refer to FIG. 6 and FIG. 7, FIG. 6 is a structural schematic diagram of a fifth embodiment of the lens module 10 provided by the present application, and FIG. 7 is a schematic diagram of anti-reflection film producing wedge interference.

[0079] As shown in FIG. 7, the first antireflection member 112 includes a plurality of antireflection film units 1123 stacked in the thickness direction of the optical waveguide lens 111, the plurality of antireflection film units 1123 including at least one first type film 1125 and at least one second type film 1126, and the at least one first type film 1125 and the at least one second type film 1126 being alternately arranged in the thickness direction of the optical waveguide lens 111, the first type film 1125 having a refractive index less than 2.5, the second type film 1126 having a refractive index less than 1.45, and the refractive index of the first type film 1125 being greater than the refractive index of the second type film 1126.

[0080] wherein the thickness of the first type film 1125 is equal to λ / 4*n1, the thickness of the second type film 1126 is equal to λ / 4*n2, λ is a specific wavelength corresponding to the antireflection film unit 1123, n1 is the refractive index of the first type film 1125, and n2 is the refractive index of the second type film 1126.

[0081] It should be noted that the numerical relationship between the first type film 1125 and the specific wavelength and the numerical relationship between the second type film 1126 and the specific wavelength have been described in the foregoing description, and specific derivation will not be repeated. However, the present embodiment limits the refractive index of the first type film 1125 and the second type film 1126 to ensure that the thickness of the second type film 1126 is much thicker than the thickness of the first type film 1125 (i.e., the thickness of the low-refractive-index antireflection film unit 1123 is much thicker than the thickness of the high-refractive-index antireflection film unit 1123), thereby reducing the wedge interference phenomenon caused by the uneven thickness of the edge of the first type film 1125.

[0082] The causes of the wedge interference will be described in combination with FIG. 7:

[0083] As shown in FIG. 7, taking the first antireflection member 112 as an example, the antireflection film includes a plurality of antireflection film units 1123 stacked, and the high-refractive-index antireflection film unit 1123 and the low-refractive-index antireflection film unit 1123 are alternately stacked. The existing antireflection film coating method is to coat the plurality of antireflection film units 1123 layer by layer on the first surface 115 of the optical waveguide lens 111. Due to the process of coating the antireflection film unit 1123, the edge of the antireflection film unit 1123 is prone to have uneven thickness, especially in the coating process of the high-refractive-index antireflection film unit 1123, the amount of raw material used is prone to exceed, and the accumulation of the extra raw material causes the edge of the antireflection film unit 1123 to be thicker, which causes serious wedge interference phenomenon, resulting in unclear view and poor user experience when the user uses the AR glasses 1 to view the outside world.

[0084] Based on this, the embodiments of the present application numerically limit the refractive index of the first type of film 1125 and the second type of film 1126, ensure that the thickness of the second type of film 1126 is much thicker than the first type of film 1125, that is, increase the thickness of the low refractive index antireflection film unit 1123, and therefore in the process of plating the first antireflection member 112, the second type of film 1126 with a significant increase in thickness will cause extrusion to the first type of film 1125, weaken the uneven thickness phenomenon of the first type of film 1125, and thus reduce the interference of the wedge interference on the user's view of the outside world.

[0085] From the perspective of production, the wedge interference is reduced: in addition to increasing the thickness of the low refractive index antireflection film unit 1123, a better edge plating process or improved plating fixture can also be used, and after plating the first antireflection member 112, processes such as photoetching and cutting can be used to trim the edge of the first antireflection member 112 relative to the side edge of the first grating structure 1115, so that the edge of the first antireflection member 112 is flat.

[0086] Please refer to FIG. 8, which is a structural schematic diagram of the sixth embodiment of the lens module provided by the present application.

[0087] As shown in FIG. 8, in some embodiments, the lens module 10 further comprises a first protection assembly 12, which is arranged on the side of the optical waveguide lens 111 forming the first grating structure 1115, and the first antireflection member 112 is arranged between the first protection assembly 12 and the optical waveguide lens 111.

[0088] Among them, the first protection assembly 12 is a light-transmitting protection assembly, to ensure that the light from the outside world of the AR glasses can pass through the first protection assembly 12, and the first protection assembly 12 covers at least the first grating structure 1115 to protect the first grating structure 1115. In some embodiments, the first protection assembly 12 covers the first grating structure 1115 and the first antireflection member 112 to improve the protection effect of the first protection assembly 12 on the whole optical waveguide lens 111 and the first grating structure 1115.

[0089] Please refer to FIG. 9, which is a structural schematic diagram of the sixth embodiment of the lens module provided by the present application.

[0090] As shown in FIG. 9, in some embodiments, the optical waveguide lens 111 forms a third target area 1113 and a fourth target area 1114 on the side surface 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 assembly 11 further comprises a second antireflection member 113, which is arranged on the side of the optical waveguide lens 111 forming the second grating structure 1116 corresponding to the fourth target area 1114.

[0091] It should be noted that the specific arrangement of the second antireflection member 113 can refer to the arrangement of the first antireflection member 112 to reduce the diffraction of external light when passing through the lens module 10, which will not be repeated here.

[0092] In the present embodiment, 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. That is, the first grating structure 1115 and the second grating structure 1116 are respectively formed on opposite sides of the optical waveguide lens 111, and the coupling-in grating and the coupling-out grating are also respectively formed on opposite sides of the optical waveguide lens 111.

[0093] For the side of the optical waveguide lens 111 on which the second grating structure 1116 is formed, it can be divided into a third target area 1113 and a fourth target area 1114, and the second grating structure 1116 is specifically arranged in the third target area 1113, and the second antireflection member 113 covers the fourth target area 1114. As with the first antireflection member 112, the coverage range of the second antireflection member 113 is limited within the fourth target area 1114, and the third target area 1113 is not covered, which can improve the overall light transmittance of the lens module 10 while ensuring the normal function of the second grating structure 1116.

[0094] It should be understood that in actual lens module 10 design, the coupling-in grating and the coupling-out grating can be arranged on the same side or different sides of the optical waveguide lens 111 according to the optical design target of the optical waveguide lens 111 or the process manufacturing condition.

[0095] Please refer to FIG. 10, which is a structural schematic diagram of a seventh embodiment of the lens module provided by the present application.

[0096] As shown in FIG. 10, in some embodiments, the first protection assembly 12 at least includes a first cover plate 121, which is arranged on the side of the optical waveguide lens 111 on which the first grating structure 1115 is formed and is arranged spaced apart from the optical waveguide assembly 11.

[0097] For example, the first cover plate 121 is a light-transmissive cover plate, such as a glass cover plate, so that the light from the outside of the AR glasses can pass through the first cover plate 121 under the premise of protecting the optical waveguide lens 111.

[0098] In some embodiments, the first cover plate 121 covers the first grating structure 1115 and the first antireflection member 112 to improve the protection effect of the first cover plate 121 on the entire optical waveguide lens 111 and the first grating structure 1115.

[0099] As shown in FIG. 10, in some embodiments, the first protective component 12 further comprises a third anti-reflection member 122, which is arranged on at least one side of the first cover plate 121 in the thickness direction of the first cover plate 121. That is, the third anti-reflection member 122 can be arranged on the near-eye side of the first cover plate 121, or on the far-eye side of the first cover plate 121, or on both sides of the first cover plate 121 in the thickness direction as shown in FIG. 10.

[0100] For example, the third anti-reflection member 122 is an anti-reflection film, which can be coated on at least one side of the first cover plate 121 in the thickness direction of the first cover plate 121 by plating.

[0101] It should be noted that when the third anti-reflection member 122 is arranged on the side of the first cover plate 121 away from the optical waveguide lens 111, the light transmittance of the light entering the first cover plate 121 from the far-eye side of the lens module 10 is increased; when the third anti-reflection member 122 is arranged on the side of the first cover plate 121 close to the optical waveguide lens 111, the light transmittance of the light exiting from the first cover plate 121 to the optical waveguide lens 111 is increased; when the third anti-reflection member 122 is arranged on both the side of the first cover plate 121 away from the optical waveguide lens 111 and the side of the first cover plate 121 close to the optical waveguide lens 111, the light transmittance of the light entering the first cover plate 121 from the far-eye side of the lens module 10 and the light transmittance of the light exiting from the first cover plate 121 to the optical waveguide lens 111 are both increased.

[0102] In some embodiments, the distance between the first protective component 12 and the first anti-reflection member 112 is 0.01 mm to 10 mm.

[0103] It should be noted that when the third anti-reflection member 122 is arranged on the side of the first cover plate 121 close to the optical waveguide lens 111, the distance between the first protective 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.

[0104] When the third anti-reflection member 122 is not arranged on the side of the first cover plate 121 close to the optical waveguide lens 111, the distance between the first protective 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.

[0105] Please refer to FIG. 11, which is a structural schematic diagram of the eighth embodiment of the lens module provided by the present application.

[0106] As shown in FIG. 11, in some embodiments, the first protective component 12 comprises a composite layer 123 covering the side of the optical waveguide lens 111 forming the first grating structure 1115, and the composite layer 123 and the surface of the first grating structure 1115 are mutually adapted; wherein the composite layer 123 at least comprises a protective coating and an anti-reflection coating.

[0107] Specifically, the protective coating is arranged on the side of the optical waveguide lens 111 forming the first grating structure 1115, at least for protecting the first grating structure 1115; and the anti-reflection coating is arranged on the side of the protective coating away from the optical waveguide lens 111, for performing anti-reflection treatment on the external light incident to the lens module 10.

[0108] For example, when the composite layer 123 is arranged, the protective coating and the anti-reflection coating can be sequentially added to the surface of the side of the optical waveguide lens 111 forming the first grating structure 1115, to ensure that the composite layer 123 and the surface of the first grating structure 1115 are mutually adapted, so that the composite layer 123 has better light transmission effect. In some embodiments, the refractive index of the composite layer 123 is between 1.2 and 1.8.

[0109] For example, the protective coating in the composite layer 123 includes an anti-abrasion film layer and a dirt-proof film layer arranged on the surface of the side of the optical waveguide lens 111 forming the first grating structure 1115, wherein the protective coating, the anti-abrasion film layer and the dirt-proof film layer can all be polymer coatings.

[0110] Compared with the use of the first cover plate 121, the composite layer 123 is used as the first protective component 12 in the embodiment, which further improves the light transmission rate of the first protective component 12 and avoids the reflection of the external incident light by the first cover plate 121 made of glass, for example.

[0111] As shown in FIG. 11, in some embodiments, the first anti-reflection member 112 can be removed on the premise that the first protective component 12 includes the composite layer 123 covering the side of the optical waveguide lens 111 forming the first grating structure 1115, and the composite layer 123 includes the anti-reflection coating.

[0112] It should be noted that the composite layer 123 at least includes the protective coating and the anti-reflection coating, the protective coating corresponds to the first protective component 12 in FIGS. 8 to 10, and the anti-reflection coating corresponds to the first anti-reflection member 112 in FIGS. 8 to 10. Therefore, in the lens module 10 as shown in FIG. 11, the side of the optical waveguide lens 111 forming the first grating structure 1115 is still provided with the first protective component 12 and the first anti-reflection member 112.

[0113] Moreover, since the composite layer 123 itself already includes the anti-reflection coating, removing the first anti-reflection member 112 does not reduce the light transmission rate of the external incident light, but can reduce the size of the lens module 10 in the thickness direction, facilitating the lightness of the lens module 10 and the AR glasses.

[0114] As shown in FIG. 10, in some embodiments, the lens module 10 further includes a second protective component 13.

[0115] Specifically, the second protection assembly 13 is arranged on the side of the optical waveguide lens 111 away from the first protection assembly 12.

[0116] It should be understood that arranging the second protection assembly 13 on the side of the optical waveguide lens 111 away from the first protection assembly 12 can improve the protection effect on the optical waveguide lens 111. For example, in some embodiments, the optical waveguide lens 111 is provided with a second grating structure 1116 on the side surface away from the first grating structure 1115, and the optical waveguide lens 111 can also effectively protect the second grating structure 1116, and in addition, the second protection assembly 13 is arranged away from the optical waveguide lens 111 to avoid damage to the second grating structure 1116.

[0117] In some embodiments, the second protection assembly 13 at least includes a second cover plate 131, which is arranged on the side of the optical waveguide lens 111 away from the first protection assembly 12 and is arranged away from the optical waveguide assembly 11.

[0118] For example, the second cover plate 131 is a light-transmissive cover plate, such as a glass cover plate, so that the light emitted from the optical waveguide lens 111 to the near-eye side can pass through the second cover plate 131 under the premise of protecting the optical waveguide lens 111.

[0119] In some embodiments, the second protection assembly 13 further includes a fourth anti-reflection member 132, which is arranged on at least one side in the thickness direction of the second cover plate 131.

[0120] For example, the fourth anti-reflection member 132 is an anti-reflection film, which can be covered on at least one side in the thickness direction of the second cover plate 131 by coating.

[0121] It should be noted that when the fourth anti-reflection member 132 is arranged on the side of the second cover plate 131 away from the optical waveguide lens 111, the light transmittance of the light entering the second cover plate 131 from the far-eye side of the lens module 10 is increased; when the fourth anti-reflection member 132 is arranged on the side of the second cover plate 131 close to the optical waveguide lens 111, the light transmittance of the light emitted from the second cover plate 131 to the near-eye side is increased; when the fourth anti-reflection member 132 is arranged on both the side of the second cover plate 131 away from the optical waveguide lens 111 and the side of the second cover plate 131 close to the optical waveguide lens 111, the light transmittance of the light entering the second cover plate 131 from the far-eye side of the lens module 10 and the light transmittance of the light emitted from the second cover plate 131 to the near-eye side are both increased.

[0122] It is to be noted that the first anti-reflection member 112, the second anti-reflection member 113, the third anti-reflection member 122 and the fourth anti-reflection member 132 in the embodiments of the present application can all be anti-reflection films, and the effect of the anti-reflection film is that the reflectivity of the anti-reflection film is less than 5% for incident light with an incident angle of 0-30 degrees entering the anti-reflection film in the visible light range.

[0123] In some embodiments, the distance between the second protective component 13 and the optical waveguide component 11 is 0.01-10 mm.

[0124] It is to be noted that when the fourth anti-reflection member 132 is arranged 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 protective component 13 and the optical waveguide component 11 refers to the distance between the fourth anti-reflection member 132 and the optical waveguide lens 111.

[0125] When the fourth anti-reflection member 132 is not arranged 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 protective component 13 and the optical waveguide component 11 refers to the distance between the second cover plate 131 and the optical waveguide lens 111.

[0126] When the fourth anti-reflection member 132 is arranged 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 protective 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.

[0127] When the fourth anti-reflection member 132 is arranged 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 protective 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.

[0128] In some embodiments, the optical waveguide lens 111 has a first surface 115 corresponding to the far eye side of the user and a second surface 116 corresponding to the near eye side of the user, and the first grating structure 1115 includes a coupling-in grating and a coupling-out grating.

[0129] When the coupling-in grating is arranged on the first surface 115, the coupling-in grating is a reflective grating, and when the coupling-in grating is arranged on the second surface 116, the coupling-in grating is a transmissive grating.

[0130] When the coupling-out grating is arranged on the first surface 115, the coupling-out grating is a reflective grating, and when the coupling-out grating is arranged on the second surface 116, the coupling-out grating is a transmissive grating.

[0131] As shown in FIG. 8, FIG. 9, FIG. 10, in some embodiments, no second protective component 13 is arranged on the side of the optical waveguide lens 111 away from the first protective component 12.

[0132] It should be noted that compared with the existing lens module or the lens module 10 shown in FIG. 10, the lens module 10 provided by the present application can not arrange a cover plate or other protective component as the second protective component 13 on the near-eye side of the optical waveguide lens 111, thereby reducing the light reflection caused by arranging the second protective component 13 and improving the overall light transmittance of the lens module 10.

[0133] In particular, considering that the near-eye side of the lens module 10 in the AR glasses will also be arranged with a near-eye lens component 14 (such as a dioptric lens or a piano lens), the near-eye lens component 14 can be implemented on the optical waveguide lens 111, and therefore the scheme of not arranging a cover plate or other protective component directly on the near-eye side of the optical waveguide lens 111 is feasible.

[0134] As shown in FIG. 11, in some embodiments, the optical waveguide lens 111 includes an optical waveguide substrate 1117 and an imprint adhesive layer 1118, wherein the imprint adhesive layer 1118 is arranged on at least one side of the optical waveguide substrate 1117 in the thickness direction thereof, and the imprint adhesive layer 1118 forms the first grating structure 1115.

[0135] In some embodiments, the imprint adhesive layer 1118 can be arranged on opposite sides of the optical waveguide substrate 1117 in the thickness direction thereof, and the imprint adhesive layers 1118 located on the opposite sides of the optical waveguide substrate 1117 respectively form the first grating structure 1115 and the second grating structure 1116 shown in FIG. 9.

[0136] Referring to FIG. 12, FIG. 12 is a structural schematic diagram of a ninth embodiment of the lens module provided by an embodiment of the present application.

[0137] As shown in FIG. 12(a)(b), in some embodiments, the edge of the lens module 10 is provided with an adhesive 16, and the adhesive 16 is used to fix the edge of the optical waveguide component 11 and the edge of the first protective component 12 as shown in FIG. 12(a)(b), or is used to fix the edge of the optical waveguide component 11 and the edge of the second protective component 13 as shown in FIG. 12(b). In addition to the fixing function, the arrangement of the adhesive 16 on the edge of the lens module 10 can ensure that the distance between the optical waveguide component 11 and the first protective component 12 and / or the distance between the optical waveguide component 11 and the second protective component 13 can be maintained within the distance range described in the specification, and at the same time, it can also prevent external water vapor, dust and the like from entering between the optical waveguide component 11 and the first protective component 12 and / or between the optical waveguide component 11 and the second protective component 13.

[0138] Please refer to FIG. 13, which is a structural schematic diagram of a tenth embodiment of the lens module provided by an embodiment of the present application.

[0139] As shown in FIG. 13, in some embodiments, the lens module 10 has opposite near-eye sides and far-eye sides, and the lens module 10 further includes a near-eye lens assembly 14, which is arranged on the near-eye side of the optical waveguide lens 111; wherein the near-eye lens assembly 14 is one of a dioptric lens and a piano lens.

[0140] It should be understood that the dioptric lens is, for example, a myopic lens or a hyperopic lens, wherein the dioptric lens is used to adjust the light rays incident to the dioptric lens to meet the vision correction needs of the user. Specifically, when the user of the AR glasses has vision correction needs, the image light signals generated by the optical-mechanical module 30 of the AR glasses are conducted through the optical waveguide assembly 11 and then incident to the dioptric lens, and the light rays from the outside world that pass through the optical waveguide assembly 11 also incident to the dioptric lens, and the dioptric lens can perform dioptric adjustment on the two types of incident light so that the dioptric-adjusted light reaches the user's field of view.

[0141] It should be understood that, in the absence of vision correction needs, the dioptric lens can be replaced by a piano lens, and then the light rays from the outside world and the image light signals output by the optical-mechanical module 30 of the AR glasses are superimposed and pass through the piano lens to enter the user's field of view.

[0142] As shown in FIG. 13, in some embodiments, the near-eye lens assembly 14 includes an optical lens 141 and a rear-side coating 142, wherein the optical lens 141 is arranged on the near-eye side of the optical waveguide lens 111 and is arranged in a spaced manner with the optical waveguide assembly 11, and the rear-side coating 142 is arranged on the near-eye side of the optical lens 141.

[0143] In some embodiments, the frame module 20 further includes a front-side coating 15 arranged on the far-eye side of the optical waveguide assembly 11 and the first protection assembly 12, wherein the front-side coating 15 at least includes an anti-blue light coating.

[0144] It should be noted that arranging the front-side coating 15 including the anti-blue light coating on the far-eye side of the optical waveguide assembly 11 and the first protection assembly 12 can effectively eliminate the interference images such as ghosting, ghosting, rainbow stripes, etc. entering the human eye.

[0145] Therefore, by adopting the scheme of arranging the front-side coating 15 including the anti-blue light coating on the far-eye side of the optical waveguide assembly 11 and the first protection assembly 12, the interference images such as ghosting, ghosting, rainbow stripes, etc. entering the human eye can be effectively eliminated.

[0146] Please refer to FIG. 14, which is a structural schematic diagram of an AR glass 1 provided by an embodiment of the present application.

[0147] As shown in FIG. 14, the embodiment of the present application further provides an AR glasses 1, comprising: 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 as follows.

[0148] Specifically, the lens module 10 is any one of the lens modules 10 provided by the embodiment of the present application, and the lens module 10 has opposite near-eye side and far-eye side; the frame module 20 comprises 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 towards 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.

[0149] In some embodiments, the AR glasses 1 further comprises a near-eye lens module 40, which is arranged on the near-eye side of the lens module 10 and is spaced apart from the lens module 10.

[0150] Among them, the near-eye lens assembly 14 is one of the dioptric lens and the flat light lens.

[0151] In some embodiments, the first grating structure 1115 comprises a coupling-in grating and a coupling-out grating.

[0152] Among them, the optical machine module 30 is arranged corresponding to the coupling-in grating of the lens module 10, and is used for outputting optical signals to the coupling-in grating, and the lens module 10 is configured to conduct the optical signals incident on the coupling-in grating to the coupling-out grating for output.

[0153] As shown in FIG. 9, in some embodiments, the optical waveguide lens 111 is formed with a third target area 1113 and a fourth target area 1114 on the side surface away from the first grating structure 1115, the optical waveguide lens 111 is provided with a second grating structure 1116 at the third target area 1113, and the optical waveguide assembly 11 further comprises a second anti-reflection piece 113, which is arranged on the side of the optical waveguide lens 111 forming the second grating structure 1116 corresponding to the fourth target area 1114.

[0154] Among them, one of the first grating structure 1115 and the second grating structure 1116 comprises a coupling-in grating, and the other comprises a coupling-out grating, the optical machine module 30 is arranged corresponding to the coupling-in grating of the lens module 10, and is used for outputting optical signals to the coupling-in grating, and the lens module 10 is configured to conduct the optical signals incident on the coupling-in grating to the coupling-out grating for output.

[0155] For example, in the AR glasses 1 as shown in FIG. 14, 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 any one side of the coupling-in grating area and forms a coupling-out grating on any one side of the coupling-out grating area.

[0156] With reference to the lens module 10 provided by the embodiments of the present application, it should be understood that when the coupling-in grating is arranged 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 arranged on the near-eye side of the optical waveguide lens 111, the coupling-in grating is a transmissive grating, and the coupling-out grating is the same.

[0157] In summary, the embodiments of the present application provide a plurality of lens modules 10 and AR glasses 1. One lens module 10 includes an optical waveguide assembly 11 including at least an optical waveguide lens 111 and a first antireflection member 112. One side surface of the optical waveguide lens 111 is formed with a first target area 1111 and a second target area 1112. The optical waveguide lens 111 is provided with a first grating structure 1115 at the first target area 1111, and the first antireflection member 112 is arranged corresponding to the second target area 1112. The first antireflection member 112 is formed with a first abutment surface 1121 on one side relative to the first grating structure 1115. The first abutment surface 1121 and the optical waveguide lens 111 form a first target included angle θ1, and the angle of the first target included angle θ1 is greater than 16 degrees. The lens module 10 and the AR glasses 1 provided by the embodiments of the present application limit the inclination angle of the first antireflection member 112 on one side relative to the first grating structure 1115, ensure that the grating structure functions normally, and do not affect the overall light transmittance of the lens module 10. Under the premise that the diffraction generated when external light passes through the lens module 10 is reduced, the clarity and user experience of the user using the AR glasses 1 to view the real world are improved.

[0158] Those skilled in the art can understand that all or some of the steps in the method disclosed above, the functional modules / units in the system and the device can be implemented as software, firmware, hardware and appropriate combinations thereof. In the 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, one physical component can have multiple functions, or one function or step can be performed by several physical components in cooperation. Some or all physical components can be implemented as software executed by a processor such as a central processor, a digital signal processor or a microprocessor, or as hardware, or as a combination of setting circuitry such as a special-purpose setting circuit. Such software can be distributed on a computer-readable medium, which can include computer storage media (or non-transitory media) and communication media (or transitory media).

[0159] It is to be understood that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting. Unless specifically defined otherwise in this specification, terms "mount", "connect", "connection" are to be given their broadest interpretation consistent with the context (for example, "connection" can include a direct connection, an indirect connection through one or more intermediaries, an electrical connection, a mechanical connection, a physical connection, etc.). It is to be understood that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting. As used in this specification and the appended claims, the singular forms "a", "an" and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise.

[0160] It is also to be understood that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting. As used in this specification and the appended claims, the singular forms "a", "an" and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. It will be understood that the terms and expressions used herein are used as terms of description and not of limitation. Accordingly, it will be understood that the application is not limited to the embodiments illustrated and described above, but that various changes can be made without departing from the scope of the application.

Claims

1. A lens module of an AR glasses, the lens module comprising at least: a light waveguide assembly comprising at least a light waveguide lens and a first antireflection element, one side surface of the light waveguide lens is formed with a first target area and a second target area, the light waveguide lens is provided with a first grating structure at the first target area, and the first antireflection element is provided corresponding to the second target area; wherein the first antireflection element is formed with a first abutment surface on a side opposite to the first grating structure, the first abutment surface forms a first target angle with the light waveguide lens, and the angle of the first target angle is greater than 16 degrees.

2. A lens module of an AR glass, wherein, the lens module comprising at least: a light waveguide assembly comprising at least a light waveguide lens and a first antireflection element, one side surface of the light waveguide lens is formed with a first target area and a second target area, the light waveguide lens is provided with a first grating structure at the first target area, and the first antireflection element is provided corresponding to the second target area; wherein the first antireflection element comprises a plurality of antireflection film units stacked in the thickness direction of the light waveguide lens, wherein a side of the plurality of antireflection film units close to the first grating structure forms a sub-abutment surface, the sub-abutment surface constitutes a second abutment surface, the second abutment surface forms a second target angle with the light waveguide lens, and the angle of the second target angle is greater than 16 degrees.

3. A lens module of an AR glass, wherein, the lens module comprising at least: a light waveguide assembly comprising at least a light waveguide lens and a first antireflection element, one side surface of the light waveguide lens is formed with a first target area and a second target area, the light waveguide lens is provided with a first grating structure at the first target area, and the first antireflection element is provided corresponding to the second target area; the first antireflection element comprises a plurality of antireflection film units stacked in the thickness direction of the light waveguide lens, the plurality of antireflection film units comprises at least one first type film and at least one second type film, and at least one of the first type film and the second type film are alternately arranged in the thickness direction of the light waveguide lens, the refractive index of the first type film is less than 2.5, the refractive index of the second type film is less than 1.45, and the refractive index of the first type film is greater than that of the second type film; wherein the thickness of the first type film is equal to λ / 4*n1, the thickness of the second type film is equal to λ / 4*n2, λ is a specific wavelength corresponding to the antireflection film unit, n1 is the refractive index of the first type film, and n2 is the refractive index of the second type film.

4. The lens module of any one of claims 1-3, wherein, the light waveguide lens is formed with a third target area and a fourth target area on a side surface opposite to the first grating structure, the light waveguide lens is provided with a second grating structure at the third target area, the light waveguide assembly further comprises a second antireflection element, and the second antireflection element is provided on a side of the light waveguide lens forming the second grating structure corresponding to the fourth target area.

5. The lens module of any one of claims 1-3, wherein, the lens module further comprises a first protection assembly, the first protection assembly is provided on a side of the light waveguide lens forming the first grating structure, and the first antireflection element is provided between the first protection assembly and the light waveguide lens; and / or, The lens module further comprises a second protection assembly, which is arranged on the side of the optical waveguide lens away from the first protection assembly.

6. The lens module of claim 5, wherein, The first protection assembly comprises at least a first cover plate, which is arranged on the side of the optical waveguide lens forming the first grating structure and is spaced apart from the optical waveguide assembly.

7. The lens module of claim 5, wherein, The first protection assembly further comprises a third anti-reflection member, which is arranged on at least one side in the thickness direction of the first cover plate.

8. The lens module of claim 5, wherein, The first protection assembly comprises a composite layer covering the side of the optical waveguide lens forming the first grating structure, and the composite layer is adapted to the surface of the first grating structure. The composite layer comprises at least a protective coating and an anti-reflection coating.

9. The lens module of claim 5, wherein, The second protection assembly comprises at least a second cover plate, which is arranged on the side of the optical waveguide lens away from the first protection assembly and is spaced apart from the optical waveguide assembly.

10. The lens module of claim 9, wherein, The second protection assembly further comprises a fourth anti-reflection member, which is arranged on at least one side in the thickness direction of the second cover plate.

11. The lens module of claim 5, wherein, The distance between the first protection assembly and the first anti-reflection member is 0.01mm to 10mm; And / or, the distance between the second protection assembly and the optical waveguide assembly 11 is 0.01mm to 10mm.

12. The lens module of any one of claims 1-3, wherein, The optical waveguide lens comprises an optical waveguide substrate and an imprint adhesive layer, wherein the imprint adhesive layer is arranged on at least one side of the optical waveguide substrate in the thickness direction thereof, and the imprint adhesive layer forms the first grating structure.

13. The lens module of any of claims 1-3, wherein, The lens module has opposite near-eye side and far-eye side, and further comprises a near-eye lens assembly arranged on the near-eye side of the optical waveguide lens. The near-eye lens assembly is one of a dioptric lens and a piano lens.

14. The lens module of claim 13, wherein, The near-eye lens assembly comprises an optical lens and a back-side 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 back-side coating is arranged on the near-eye side of the optical lens.

15. The lens module of claim 14, wherein, The frame module further comprises a front-side coating arranged on the far-eye side of the optical waveguide assembly and the first protection assembly, wherein the front-side coating comprises at least a blue light-proof coating.

16. The lens module of any one of claims 1-3, wherein, The optical waveguide lens has a first surface corresponding to the far-eye side of the user and a second surface corresponding to the near-eye side of the user, and the first grating structure comprises a coupling-in grating and a coupling-out grating. When the coupling-in grating is arranged on the first surface, the coupling-in grating is a reflective grating, and when the coupling-in grating is arranged on the second surface, the coupling-in grating is a transmissive grating. When the coupling-out grating is arranged on the first surface, the coupling-out grating is a reflective grating, and when the coupling-out grating is arranged on the second surface, the coupling-out grating is a transmissive grating.

17. An AR eyewear, wherein, The AR glasses comprise: The lens module of any one of claims 1-16, which has opposite near-eye side and far-eye side; A frame module, which comprises 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 towards the near-eye side of the lens module; The frame module further comprises a front-side coating arranged on the far-eye side of the optical waveguide assembly and the first protection assembly, wherein the front-side coating comprises at least a blue light-proof coating. An optical-mechanical module is connected to at least one of the frame assembly and the temple assembly and is arranged corresponding to the lens module.

18. The AR glasses of claim 17, wherein, The AR glasses further include a near-eye lens module arranged on a near-eye side of the lens module and spaced apart from the lens module. The near-eye lens assembly is one of a dioptric lens and a piano lens.

19. The AR glasses of claim 18, wherein, The first grating structure includes an in-coupling grating and an out-coupling grating. The optical-mechanical module is arranged corresponding to the in-coupling grating of the lens module and is configured to output an optical signal to the in-coupling grating, and the lens module is configured to transmit the optical signal incident on the in-coupling grating to the out-coupling grating for output. The optical waveguide lens is formed with a third target area and a fourth target area on a side surface opposite to the first grating structure, the optical waveguide lens is provided with a second grating structure at the third target area, and the optical waveguide assembly further includes a second anti-reflection member arranged on a side of the optical waveguide lens corresponding to the fourth target area.

20. The AR glasses of claim 17, wherein, One of the first grating structure and the second grating structure includes an in-coupling grating, and the other includes an out-coupling grating, the optical-mechanical module is arranged corresponding to the in-coupling grating of the lens module and is configured to output an optical signal to the in-coupling grating, and the lens module is configured to transmit the optical signal incident on the in-coupling grating to the out-coupling grating for output. ​

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