Curved-surface optical lens, augmented reality glasses and manufacturing method of curved-surface optical lens

Abstract

The embodiment of the invention provides a curved-surface optical lens, augmented reality glasses and a manufacturing method of the curved-surface optical lens, and belongs to the technical field of lenses. According to the curved-surface optical lens, the planar waveguide area and the curved-surface edge area form the curved-surface optical lens, so that the waveguide core area, namely the planar waveguide area, of the whole curved-surface optical lens is kept in an absolute planar state, the stability of light transmission of the curved-surface optical lens is ensured, and therefore the image quality of a displayed image is improved; the radian, namely the base bend, is arranged in the peripheral splicing area, namely the curved surface edge area, of the planar waveguide area, so that the appearance of the augmented reality glasses formed by the curved surface optical lenses can be attached to the face of a wearer like common glasses, the appearance design of the augmented reality glasses better conforms to the human face engineering design, and the user experience is improved. On the basis that the overall thickness and weight of the optical lens are not increased, not only can the back reflection problem be optimized, but also the yield loss of the waveguide can be reduced; on the other aspect, the planar waveguide area is not bent, the curved surface edge area can be made of resin or glass material with lower cost than that of the planar waveguide area, expensive wafer level processing is not needed, the cost of the curved surface optical lens is reduced, the area of the planar waveguide area is smaller than that of the curved surface optical lens, and the curved surface optical lens is more compact. Generally, the area occupied by the planar waveguide region is less than half of the area of the curved optical lens, so that the utilization rate and the production yield of wafers in the waveguide production process are improved, and the production cost of the waveguide is reduced.

Description

Technical Field

[0001] This invention relates to the field of lens technology, and more particularly to a curved optical lens, augmented reality glasses, and a method for manufacturing a curved optical lens. Background Technology

[0002] Currently, the core display technology for augmented reality (AR) glasses—diffractive waveguides—is mainly fabricated using semiconductor processes such as nanoimprinting and etching on glass, resin, or silicon carbide wafers to create micro-nano grating structures. Because nanoscale grating structures have extremely high requirements for the flatness and curvature of the substrate, any minute deformation can cause changes in the grating period and a shift in the light transmission angle, leading to serious optical defects in the AR glasses display, such as image ghosting, reduced clarity, or rainbow patterns.

[0003] Therefore, the waveguide lenses in related technologies are purely planar. However, traditional consumer-grade glasses typically have a certain base curve / surface curve to meet the requirements of facial ergonomics (fitting facial contours) and aesthetics. Therefore, the current purely planar waveguide lenses do not meet the needs of traditional glasses, which also results in most AR glasses looking unnatural. At the same time, this planar waveguide lens causes a relatively severe back reflection phenomenon. Because the lens is planar, the waveguide located at the edge of the wearer's visual field (right side of the right eye and left side of the left eye) directly reflects light from behind the AR glasses wearer into their eyes. This causes the wearer to clearly see the scene behind them when wearing these AR glasses, creating a safety hazard. For example, bright headlights from behind while driving may affect the wearer's primary line of sight.

[0004] In related technologies, plano-concave / plano-convex lenses are bonded to the front and back of the waveguide to give the waveguide lens an overall curved surface and optimize the back reflection problem. However, the fabrication of plano-concave / plano-convex lenses themselves requires a certain thickness at the center of the lens (usually greater than 0.8mm), and the use of this bonding method places high demands on the design and assembly precision of the AR glasses lens, which increases the yield loss of the waveguide lens and increases the overall thickness and weight of the AR glasses lens. Summary of the Invention

[0005] This invention provides a curved optical lens, augmented reality glasses, and a method for manufacturing a curved optical lens, aiming to solve the problem of optimizing back reflection and reducing yield loss of waveguide lenses without increasing overall thickness and weight.

[0006] In a first aspect, embodiments of the present invention provide a curved optical lens, the curved optical lens comprising: Planar waveguide region and curved edge region; The planar waveguide region and the curved edge region can be combined in one of the following ways: The planar waveguide region and the curved edge region are bonded together by an optical adhesive layer; The curved edge region includes a curved outer lens and a curved inner lens. When the curved outer lens and the curved inner lens are attached, there is an accommodating space, and the planar waveguide region is placed in the accommodating space. The planar waveguide region is placed as an insert in the curved mold cavity. After resin is injected into the mold cavity for molding, a curved optical lens is formed by the curved edge region of the planar waveguide region being wrapped by the resin.

[0007] Optionally, the contact surface between the planar waveguide region and the optical adhesive layer is a first inclined surface; The contact surface between the curved edge region and the optical adhesive layer is a second inclined surface, and the first inclined surface and the second inclined surface are complementary inclined surfaces.

[0008] Optionally, after the adhesive forming the optical adhesive layer is applied to the first inclined surface and / or the second inclined surface to bond the planar waveguide region and the curved edge region, and after the optical adhesive layer has cured, the optical adhesive layer is subjected to surface polishing treatment.

[0009] Optionally, the planar waveguide region includes an optically effective region and an edge region, with the first inclined surface disposed in the edge region.

[0010] Optionally, the visible light transmittance of the planar waveguide region is the same as the visible light transmittance of the curved edge region; And / or the difference between the first refractive index of the planar waveguide region and the second refractive index of the curved edge region is less than a first preset value.

[0011] Optionally, the difference between the first refractive index of the planar waveguide region and the third refractive index of the optical adhesive layer is less than a second preset value; and / or The difference between the second refractive index of the curved edge region and the third refractive index of the optical adhesive layer is less than a third preset value.

[0012] Secondly, embodiments of the present invention also provide augmented reality glasses, the augmented reality glasses including the curved optical lenses described above.

[0013] Optionally, the augmented reality glasses include a frame, which is a semi-open frame, and the structural endpoints of the semi-open frame correspond to the location of the optical adhesive layer.

[0014] Optionally, the augmented reality glasses include a frame, and decorative elements are provided at positions corresponding to the optical adhesive layer on the frame.

[0015] Thirdly, embodiments of the present invention also provide a method for manufacturing a curved optical lens, the method comprising: The edge of the waveguide lens is cut into a first bevel to obtain the planar waveguide region of the curved optical lens; The inner edge of the central hollow area or groove of the curved lens is cut into a second bevel to obtain the curved edge area of ​​the curved optical lens. The first bevel and the second bevel are complementary bevels, and the shape of the central hollow area or groove is the same as the shape of the cut waveguide lens, so that the planar waveguide area is embedded in the curved edge area through the central hollow area or groove. The planar waveguide region and the curved edge region are bonded together with adhesive to obtain the curved optical lens.

[0016] Optionally, the step of bonding the planar waveguide region and the curved edge region with adhesive to obtain the curved optical lens includes: The planar waveguide region and the curved edge region are bonded together with adhesive to form a planar waveguide region and a curved edge region bonded by an optical adhesive layer; The optical adhesive layer is subjected to ultraviolet curing to obtain a cured optical adhesive layer; The cured optical adhesive layer is then surface-polished to obtain a polished optical adhesive layer. The polished optical adhesive layer is coated to obtain the curved optical lens.

[0017] This invention provides a curved optical lens, augmented reality glasses, and a method for manufacturing the curved optical lens. The curved optical lens is composed of a planar waveguide region and a curved edge region. The core waveguide region of the entire curved optical lens, i.e., the planar waveguide region, remains absolutely planar, ensuring the stability of light transmission and thus improving the image quality. An arc, or base curve, is provided in the outer splicing region of the planar waveguide region, i.e., the curved edge region, so that the augmented reality glasses made of this curved optical lens can fit the wearer's face as closely as ordinary glasses, making the design of the augmented reality glasses more ergonomically consistent with facial features. The design achieves the optimization of back reflection and reduction of waveguide yield loss without increasing the overall thickness and weight of the optical lens. On another level, the embodiments of this application do not involve bending the planar waveguide region, and the curved edge region can be made of resin or glass materials that are less expensive than the planar waveguide region, eliminating the need for expensive wafer-level processing and reducing the cost of curved optical lenses. Furthermore, the area of ​​the planar waveguide region is smaller than the area of ​​the curved optical lens. Generally, the area occupied by the planar waveguide region is less than half the area of ​​the curved optical lens, which improves the wafer utilization rate and production yield in the waveguide production process and reduces the production cost of the waveguide. Attached Figure Description

[0018] To more clearly illustrate the technical solutions of the embodiments of this application, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0019] Figure 1 This is a schematic diagram of the structure of a smooth optical lens provided in an embodiment of the present invention; Figure 2 This is a schematic diagram of another smooth optical lens provided in an embodiment of the present invention; Figure 3 This is a schematic diagram of the structure of augmented reality glasses provided in an embodiment of the present invention; Figure 4 This is a schematic diagram of another augmented reality glasses provided in an embodiment of the present invention; Figure 5 This is a schematic flowchart of a method for manufacturing a curved optical lens according to an embodiment of the present invention. Detailed Implementation

[0020] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0021] The flowchart shown in the attached diagram is for illustrative purposes only and does not necessarily include all content and operations / steps, nor does it necessarily have to be performed in the order described. For example, some operations / steps can be broken down, combined, or partially merged, so the actual execution order may change depending on the actual situation.

[0022] It should be understood that the terminology used in this specification is for the purpose of describing particular embodiments only and is not intended to limit the invention. As used in this specification and the appended claims, the singular forms “a,” “an,” and “the” are intended to include the plural forms unless the context clearly indicates otherwise.

[0023] Currently, the core display technology for augmented reality (AR) glasses—diffractive waveguides—is mainly fabricated using semiconductor processes such as nanoimprinting and etching on glass, resin, or silicon carbide wafers to create micro-nano grating structures. Because nanoscale grating structures have extremely high requirements for the flatness and curvature of the substrate, any minute deformation can cause changes in the grating period and a shift in the light transmission angle, leading to serious optical defects in the AR glasses display, such as image ghosting, reduced clarity, or rainbow patterns.

[0024] Therefore, the waveguide lenses in related technologies are purely planar. However, traditional consumer-grade glasses typically have a certain base curve / surface curve to meet the requirements of facial ergonomics (fitting facial contours) and aesthetics. Therefore, the current purely planar waveguide lenses do not meet the needs of traditional glasses, which also results in most AR glasses looking unnatural. At the same time, this planar waveguide lens causes a relatively severe back reflection phenomenon. Because the lens is planar, the waveguide located at the edge of the wearer's visual field (right side of the right eye and left side of the left eye) directly reflects light from behind the AR glasses wearer into their eyes. This causes the wearer to clearly see the scene behind them when wearing these AR glasses, creating a safety hazard. For example, bright headlights from behind while driving may affect the wearer's primary line of sight.

[0025] In related technologies, plano-concave / plano-convex lenses are bonded to the front and back of the waveguide to give the waveguide lens an overall curved surface and optimize the back reflection problem. However, the fabrication of plano-concave / plano-convex lenses themselves requires a certain thickness at the center of the lens (usually greater than 0.8mm), and the use of this bonding method places high demands on the design and assembly precision of the AR glasses lens, which increases the yield loss of the waveguide lens and increases the overall thickness and weight of the AR glasses lens.

[0026] To address the aforementioned problems, this invention provides a curved optical lens, augmented reality glasses, and a method for manufacturing the curved optical lens. The curved optical lens is composed of a planar waveguide region and a curved edge region. This ensures that the core waveguide region of the entire curved optical lens, i.e., the planar waveguide region, remains absolutely planar, guaranteeing the stability of light transmission and thus improving the image quality. An arc, or base curve, is provided in the outer splicing region of the planar waveguide region, i.e., the curved edge region. This allows the augmented reality glasses made of this curved optical lens to conform to the wearer's face like ordinary glasses, making the design of the augmented reality glasses more ergonomic and achieving a reduction in overall thickness without increasing the overall thickness of the optical lens. Based on the principles of precision and weight reduction, this approach optimizes back reflection and reduces waveguide yield loss. Furthermore, in this embodiment, the planar waveguide region is not bent, and the curved edge region can be made of resin or glass materials that are less expensive than the planar waveguide region. This eliminates the need for expensive wafer-level processing, reducing the cost of curved optical lenses. Additionally, the area of ​​the planar waveguide region is smaller than that of the curved optical lens; typically, the area occupied by the planar waveguide region is less than half the area of ​​the curved optical lens. This improves wafer utilization and production yield during waveguide manufacturing, thereby reducing waveguide production costs.

[0027] The lenses provided in this embodiment of the invention can be applied to augmented reality glasses.

[0028] The following detailed description, in conjunction with the accompanying drawings, describes some embodiments of the present invention. Unless otherwise specified, the following embodiments and features can be combined with each other. For ease of description, the following embodiments are illustrated using a smooth optical lens applied to a head-mounted display device as an example.

[0029] Please see Figure 1 , Figure 1 This is a schematic diagram of the structure of a smooth optical lens provided in an embodiment of the present invention.

[0030] like Figure 1As shown, the curved optical lens 10 includes a planar waveguide region 11 and a curved edge region 12. The planar waveguide region 11 is a rectangular or polygonal waveguide sheet that has been cut. For example, when the waveguide sheet is a diffractive waveguide sheet, the planar waveguide region 11 is an effective optical path region including an input grating and an output grating. In another embodiment, in addition to the input and output gratings, the planar waveguide region may also include an effective optical path region formed by a pupil expansion region. It is understood that the planar waveguide region is a purely planar region without curvature. It is understood that in this embodiment, the waveguide sheet can be a diffractive waveguide sheet, a holographic waveguide sheet, or a geometric waveguide sheet.

[0031] like Figure 1 As shown, the planar waveguide region 11 is inside the curved optical lens 10, while the curved edge region 12 is the outer periphery of the curved optical lens 10. The curved edge region 12 has a preset base curvature, such as Base 4 or Base 5, where the preset base curvature refers to the basic curvature preset before the component leaves the factory. Base 4 indicates that the base curvature value of the component is 4 diopters (D), which is a core parameter for measuring the curvature of the optical component. In one embodiment, the curved edge region 12 is a transparent lens frame. The planar waveguide region 11 and the curved edge region 12 are combined to form the curved optical lens 10.

[0032] The planar waveguide region 11 and the curved edge region 12 can be combined in one of the following ways: The first method involves bonding the planar waveguide region 11 and the curved edge region 12 together with an optical adhesive layer (not shown in the figure). In this case, the curved edge region 12 has through-holes or grooves that match the shape of the planar waveguide region 11, allowing the planar waveguide region 11 to be embedded into the curved edge region 12 through these through-holes or grooves. When the planar waveguide region 11 is embedded into the curved edge region 12 through these through-holes or grooves, adhesive is filled into the gap between the planar waveguide region 11 and the curved edge region 12 to ensure they are bonded together. This adhesive is an optically transparent adhesive, such as LOCA (Liquid Optically Clear Adhesive), acrylic optical adhesive, or epoxy optical adhesive. Essentially, the adhesive between the planar waveguide region 11 and the curved edge region 12 forms an optical adhesive layer, which bonds the planar waveguide region 11 and the curved edge region 12 together.

[0033] The second approach is as follows: the curved edge region 12 includes a curved outer lens and a curved inner lens. When the curved outer lens and the curved inner lens are attached, there is an accommodating space. The shape of this accommodating space matches the shape of the planar waveguide region 11. The planar waveguide region 11 can be placed in the accommodating space. It can be understood that at this time, the structure of the entire curved optical lens 10 is similar to a sandwich structure. The planar waveguide region 11 is a sandwich device between the curved outer lens and the curved inner lens. That is, the curved outer lens and the curved inner lens act as a double cover plate to sandwich the planar waveguide region 11. The curved outer lens can be a protective lens. Compared to the first method, the curved optical lens 10 formed by the second method is thicker. To ensure the performance of the curved optical lens 10, a fully bonded layer needs to be placed between the outer curved lens and the planar waveguide region 11, and between the inner curved lens and the planar waveguide region 11, to eliminate air gaps. This increases the weight of the curved optical lens. However, in the second method, the planar waveguide region 11 of the curved optical lens 10 is sandwiched within the curved edge region 12, resulting in better waterproof and dustproof performance for the planar waveguide region 11. Here, air gaps refer to the tiny gas gaps reserved between the various layers of the lens structure, and the fully bonded layer refers to filling the gaps between the various layers of the lens structure with an optically transparent adhesive to eliminate air gaps and form a gapless, integrated optical structure.

[0034] The third method involves placing the planar waveguide region 11 as an insert in a curved mold cavity. After injecting optical resin into the mold cavity, a curved optical lens 10 is formed, with the planar waveguide region 11 encased by a curved edge region 12 made of resin. The preset base curvature of the curved mold cavity is also pre-set, such as Base 4 or Base 5, so that the curved optical lens 10 produced by the curved mold has a preset base curvature. It can be understood that the planar waveguide region 11 is first placed as an insert into a mold cavity with a preset base curvature (i.e., a specific arc), and then liquid optical resin is injected into the mold cavity. During the curing process, the resin naturally encapsulates the sides of the planar waveguide region 11. After the resin cures, a curved optical lens 10 is formed. The curved edge region 12 is the area corresponding to the cured resin. During the resin injection process, to avoid damaging the waveguide sheet of the planar waveguide region 11, the appropriate injection pressure and temperature of the curved mold cavity must be selected according to the different resin substrates. Specific details can be found in related technologies; this embodiment will not elaborate further. Compared to the first and second methods, the third method does not require glue to bond the planar waveguide region 11 and the curved edge region 12. The planar waveguide region 11 and the curved edge region 12 are integrated into one, and the bonding force between the planar waveguide region 11 and the curved edge region 12 is the strongest at this time.

[0035] This embodiment uses a planar waveguide region 11 and a curved edge region 12 to form a curved optical lens 10. This ensures that the core waveguide region 11 of the entire curved optical lens 10 remains absolutely planar, guaranteeing the stability of light transmission and the nanostructure of the curved optical lens 10, thereby improving the image quality. An arc, or base curve, is provided in the outer splicing area of ​​the planar waveguide region 11, i.e., the curved edge region 12. This allows the augmented reality glasses made of this curved optical lens 10 to fit the wearer's face as closely as ordinary glasses, making the design of the augmented reality glasses more ergonomically designed for the human face. This achieves a reduction in the overall thickness and weight of the optical lens. Based on this, it can optimize the back reflection problem and reduce the yield loss of the waveguide. On another level, in this embodiment, the planar waveguide region 11 is not bent, which avoids the high-risk bending process of the brittle waveguide wafer. Moreover, the curved edge region 12 can be made of resin or glass materials that are cheaper than the planar waveguide region 11, without the need for expensive wafer-level processing, which reduces the cost of the curved optical lens 10. In addition, the area of ​​the planar waveguide region 11 is smaller than the area of ​​the curved optical lens 10. Generally, the area occupied by the planar waveguide region 11 is less than half the area of ​​the curved optical lens 10, which improves the wafer utilization rate and production yield in the waveguide production process and reduces the production cost of the waveguide.

[0036] In one embodiment, if the planar waveguide region 11 and the curved edge region 12 are combined to form the curved optical lens 10 using the first method described above, the contact surface between the planar waveguide region 11 and the optical adhesive layer is designated as the first inclined surface, i.e., the contact surface of the planar waveguide region 11 near the curved edge 12 is the first inclined surface. The contact surface between the curved edge region 12 and the optical adhesive layer is designated as the second inclined surface, i.e., the inclined surface of the curved edge region 12 near the planar waveguide region 11 is the second inclined surface (this second inclined surface is the inclined surface of the inner edge of the pupil or groove in the curved edge region 12). The first and second inclined surfaces are complementary. The tilt angle of the first inclined surface can be set as needed, such as 40 degrees, 45 degrees, or 52 degrees. The sum of the angles of the first and second inclined surfaces equals 180 degrees. In this embodiment, by setting the first and second inclined surfaces as complementary inclined surfaces, the planar waveguide region 11 and the curved edge region 12 can fit together completely, reducing adhesive marks in the curved optical lens 10. In one embodiment, the first and second inclined surfaces may also be complementary stepped surfaces.

[0037] In one embodiment, adhesive is applied to the first inclined surface and / or the second inclined surface to bond the planar waveguide region 11 and the curved edge region 12 together. The adhesive between the first and second inclined surfaces is the optical adhesive layer. After the optical adhesive layer is cured, the surface of the optical adhesive layer is polished to remove adhesive overflow and edge burrs, thereby eliminating surface defects of the optical adhesive layer and improving the consistency of the optical performance of the curved optical lens 10.

[0038] In one embodiment, reference Figure 2 , Figure 2 This is a schematic diagram of another structure of a smooth optical lens 10 provided in an embodiment of the present invention. Figure 2 It is known that the planar waveguide region 11 includes an optically effective region 111 and an edge region 112, with a first inclined surface disposed on the side of the edge region 112 near the curved edge region 12. The width of the edge region 112 can be between 0.4 mm and 1.2 mm. By dividing the planar waveguide region 11 into the optically effective region 111 and the edge region 112, during the bonding process of the planar waveguide region 11 and the curved edge region 12 with adhesive, the adhesive application area is controlled within the first inclined surface of the edge region 112. The edge 112 serves as a safe boundary for adhesive application, ensuring that even if adhesive overflows, it will not enter the optically effective region 111, thus preventing adhesive from overflowing into the total internal reflection area of ​​the planar waveguide region 11 and guaranteeing the optical performance of the curved optical lens 10.

[0039] In one embodiment, the visible light transmittance of the planar waveguide region 11 and the visible light transmittance of the curved edge region 12 are the same, and / or the difference between the first refractive index of the planar waveguide region 11 and the second refractive index of the curved edge region 12 is less than a first preset value. The magnitude of the first preset value can be set as needed, and this embodiment does not limit the magnitude of the first preset value. This embodiment ensures the stability of the optical performance of the curved optical lens 10 and improves the imaging quality of the curved optical lens 10 by making the visible light transmittance of the planar waveguide region 11 and the curved edge region 12 the same. This embodiment also makes the difference between the first refractive index of the planar waveguide region 11 and the second refractive index of the curved edge region 12 less than the first preset value, thereby making the refractive index of the curved edge region 12 similar to the refractive index of the planar waveguide region 11, thus ensuring that light can be effectively transmitted to the entire curved optical lens 10.

[0040] In one embodiment, the difference between the first refractive index of the planar waveguide region 11 and the third refractive index of the optical adhesive layer is less than a second preset value; and / or the difference between the second refractive index of the curved edge region 12 and the third refractive index of the optical adhesive layer is less than a third preset value. The magnitudes of the first, second, and third preset values ​​may be equal or unequal. This embodiment ensures that the refractive index of the adhesive bonding the planar waveguide region 11 and the curved edge region 12 is similar to the refractive indices of the planar waveguide region 11 and the curved edge region 12, thereby ensuring that light from the planar waveguide region 11 can smoothly enter the curved edge region 12 when it reaches its boundary (the boundary adjacent to the curved edge region 12), avoiding total internal reflection in the optical adhesive layer.

[0041] Please see Figure 3 and Figure 4 The present invention also provides augmented reality glasses, which include the curved optical lens 10 in the above embodiments. The augmented reality glasses in this embodiment include the curved optical lens 10, so that the appearance of the augmented reality glasses can fit the wearer's face as well as ordinary glasses, making the appearance design of the augmented reality glasses more in line with human facial ergonomics, and ensuring that the optical lens of the augmented reality glasses can optimize the back reflection problem without increasing the overall thickness and weight. That is, while reducing the weight of the augmented reality glasses, the image quality of the images displayed by the augmented reality glasses is improved.

[0042] In one embodiment, reference is made to Figure 3 The augmented reality glasses include a frame, which is a semi-open frame. The location of the structural endpoint 15 of the semi-open frame corresponds to the location of the optical adhesive layer 14. It can be understood that the location of the optical adhesive layer 14 here is one of the locations within the frame area of ​​the entire optical adhesive layer 14. (Refer to...) Figure 3 The optical adhesive layer 14 is located in the area slightly above the structural endpoint 15 to ensure that the coupling grating of the planar waveguide region 11 can successfully couple light.

[0043] In one embodiment, reference is made to Figure 4 The augmented reality glasses include a frame, and a decorative element 13 is provided at the corresponding position between the frame and the optical adhesive layer. The decorative element 13 can be a gold-edged or silver-edged decorative element. This embodiment does not limit the shape of the decorative element 13. For example, the shape of the decorative element 13 can be a circle, a rectangle, or a five-pointed star, etc.

[0044] In this embodiment, when the frame of the augmented reality glasses is a semi-open frame, the position of the structural end 15 of the semi-open frame corresponds to the position of the optical adhesive layer 14, and the semi-open lines of the frame cover the splicing seam corresponding to the optical adhesive layer 14; when the frame is a full frame, decorative parts 13 are set at the corresponding positions of the frame and the optical adhesive layer, thereby beautifying the appearance of the augmented reality device.

[0045] Please see Figure 5 , Figure 5 This is a schematic flowchart illustrating a method for manufacturing the curved optical lens 10 according to an embodiment of the present invention. Figure 5 It can be seen that the manufacturing method of the curved optical lens 10 includes: Step S501: Cut the edge of the waveguide lens into a first bevel to obtain the planar waveguide region 11 of the curved optical lens 10.

[0046] Step S502: Cut the inner edge of the central hollow area or groove of the curved lens into a second bevel to obtain the curved edge area 12 of the curved optical lens 10. The first bevel and the second bevel are complementary bevels, and the shape of the central hollow area or groove is the same as the shape of the cut waveguide lens, so that the planar waveguide area 11 is embedded in the curved edge area 12 through the central hollow area or groove.

[0047] The fabrication process of the curved optical lens 10 includes a waveguide fabrication step, a peripheral lens fabrication step, and a bonding step. The waveguide fabrication step involves first cutting the edge of the planar waveguide lens into a first bevel, such as at a 45-degree or 50-degree angle, to obtain the planar waveguide region 11 of the curved optical lens 10. The peripheral lens fabrication step involves fabricating an amplitude-dependent peripheral lens by cutting the inner edge of the central hollow area or groove of the curved lens into a second bevel, thus obtaining the curved edge region 12 of the curved optical lens. This second bevel and the first bevel are complementary bevels, meaning the sum of the inclination angles of the first and second bevels equals 180 degrees. It is understood that the shape of the central hollow area or groove of the curved edge region 12 is the same as the shape of the cut waveguide lens, i.e., the planar waveguide region 11, and the planar waveguide region 11 can be completely embedded into the central hollow area or groove of the curved edge region 12. The shape of the planar waveguide region 11 can be rectangular or a specific polygon.

[0048] Step S503: Use adhesive to bond the planar waveguide region and the curved edge region together to obtain the curved optical lens.

[0049] The bonding step involves using adhesive to bond the planar waveguide region 11 and the curved edge region 12 together to obtain the curved optical lens 10. It can be understood that after the planar waveguide region 11 and the curved edge region 12 are bonded together with adhesive, the planar waveguide region 11 can be completely embedded into the central hollow area or groove of the curved edge region 12.

[0050] In one embodiment, step S503 includes: bonding the planar waveguide region 11 and the curved edge region 12 with adhesive to form a planar waveguide region 11 and a curved edge region 12 bonded by an optical adhesive layer; subjecting the optical adhesive layer to ultraviolet curing to obtain a cured optical adhesive layer, wherein ultraviolet curing enables the bonding of the planar waveguide region 11 and the curved edge region 12 to rapid bonding and curing, such as selecting ultraviolet light in the band of 365nm or 395nm for curing, and the ultraviolet irradiance and curing time during the curing process can be determined according to the thickness of the optical adhesive layer, the thicker the optical adhesive layer, the greater the ultraviolet irradiance and the curing time; and performing surface polishing on the cured optical adhesive layer to obtain a polished optical adhesive layer, wherein the polishing process eliminates the defects in the curved optical lens during the curing process. Surface defects generated in step 10, such as uneven adhesive layer leveling and microparticle impurities, are eliminated to improve the surface smoothness and gloss of the optical adhesive layer, ensuring the optical transmittance of the obtained curved optical lens 10 and reducing the scattering loss of the curved optical lens 10. The polished optical adhesive layer is then coated to obtain the curved optical lens 10. This coating process involves depositing a functional optical thin film, such as an anti-reflective film, to improve the transmittance of the curved optical lens 10 to the visible light band. A hard coating may also be applied to improve the surface hardness and abrasion resistance of the curved optical lens 10, and the hard coating can also conceal traces of the optical adhesive layer between the planar waveguide region 11 and the curved edge region 12. Finally, an anti-fouling film may be applied to prevent the adhesion of contaminants such as fingerprints, sweat, or dust, improving the surface cleanliness of the curved optical lens 10.

[0051] Those skilled in the art will understand that all or some of the steps, systems, or apparatuses disclosed above, and their functional modules / units, can be implemented as software, firmware, hardware, or suitable combinations thereof. In hardware embodiments, the division between functional modules / units mentioned in the above description does not necessarily correspond to the division of physical components; for example, a physical component may have multiple functions, or a function or step may be performed collaboratively by several physical components. Some or all physical components may be implemented as software executed by a processor, such as a central processing unit, digital signal processor, or microprocessor, or as hardware, or as an integrated circuit, such as an application-specific integrated circuit. Such software may be distributed on a computer-readable medium, which may include computer storage media (or non-transitory media) and communication media (or transient media). As is known to those skilled in the art, the term computer storage media includes volatile and non-volatile, removable and non-removable media implemented in any method or technology for storing information (such as computer-readable instructions, data structures, program modules, or other data). Computer storage media include, but are not limited to, RAM, ROM, EEPROM, flash memory or other memory technologies, CD-ROM, digital versatile disc (DVD) or other optical disc storage, magnetic cartridges, magnetic tape, disk storage or other magnetic storage devices, or any other medium that can be used to store desired information and can be accessed by a computer. Furthermore, it is well known to those skilled in the art that communication media typically contain computer-readable instructions, data structures, program modules, or other data in modulated data signals such as carrier waves or other transmission mechanisms, and may include any information delivery medium.

[0052] It should be understood that the term "and / or" as used in this specification and the appended claims refers to any combination and all possible combinations of one or more of the associated listed items, and includes such combinations. It should be noted that, herein, the terms "comprising," "including," or any other variations thereof are intended to cover a non-exclusive inclusion, such that a process, method, article, or system that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or system. Without further limitation, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or system that includes that element.

[0053] The sequence numbers of the above embodiments of the present invention are merely for descriptive purposes and do not represent the superiority or inferiority of the embodiments. The above descriptions are only specific embodiments of the present invention, but the scope of protection of the present invention is not limited thereto. Any person skilled in the art can easily conceive of various equivalent modifications or substitutions within the technical scope disclosed in the present invention, and these modifications or substitutions should all be covered within the scope of protection of the present invention. Therefore, the scope of protection of the present invention should be determined by the scope of the claims.

Claims

1. A curved optical lens, characterized in that, The curved optical lens includes: Planar waveguide region and curved edge region; The planar waveguide region and the curved edge region can be combined in one of the following ways: The planar waveguide region and the curved edge region are bonded together by an optical adhesive layer; The curved edge region includes a curved outer lens and a curved inner lens. When the curved outer lens and the curved inner lens are attached, there is an accommodating space, and the planar waveguide region is placed in the accommodating space. The planar waveguide region is placed as an insert in the curved mold cavity. After resin is injected into the mold cavity for molding, a curved optical lens is formed by the curved edge region of the planar waveguide region being wrapped by the resin.

2. The curved optical lens according to claim 1, characterized in that, The contact surface between the planar waveguide region and the optical adhesive layer is a first inclined surface; The contact surface between the curved edge region and the optical adhesive layer is a second inclined surface, and the first inclined surface and the second inclined surface are complementary inclined surfaces.

3. The curved optical lens according to claim 2, characterized in that, When the adhesive forming the optical bonding layer is applied to the first inclined surface and / or the second inclined surface to bond the planar waveguide region and the curved edge region, and after the optical bonding layer is cured, the optical bonding layer is subjected to surface polishing treatment.

4. The curved optical lens according to claim 2, characterized in that, The planar waveguide region includes an optically effective region and an edge region, and the first inclined surface is disposed in the edge region.

5. The curved optical lens according to claim 1, characterized in that, The visible light transmittance of the planar waveguide region is the same as that of the curved edge region; And / or the difference between the first refractive index of the planar waveguide region and the second refractive index of the curved edge region is less than a first preset value.

6. The curved optical lens according to claim 5, characterized in that, The difference between the first refractive index of the planar waveguide region and the third refractive index of the optical adhesive layer is less than a second preset value; and / or The difference between the second refractive index of the curved edge region and the third refractive index of the optical adhesive layer is less than a third preset value.

7. An augmented reality glasses, characterized in that, The augmented reality glasses include curved optical lenses as described in any one of claims 1-6.

8. The augmented reality glasses according to claim 7, characterized in that, The augmented reality glasses include a frame, which is a semi-open frame, and the structural endpoints of the semi-open frame correspond to the location of the optical adhesive layer.

9. The augmented reality glasses lens according to claim 7, characterized in that, The augmented reality glasses include a frame, and decorative elements are provided at positions corresponding to the optical adhesive layer on the frame.

10. A method for manufacturing a curved optical lens, characterized in that, The method includes: The edge of the waveguide lens is cut into a first bevel to obtain the planar waveguide region of the curved optical lens; The inner edge of the central hollow area or groove of the curved lens is cut into a second bevel to obtain the curved edge area of ​​the curved optical lens. The first bevel and the second bevel are complementary bevels, and the shape of the central hollow area or groove is the same as the shape of the cut waveguide lens, so that the planar waveguide area is embedded in the curved edge area through the central hollow area or groove. The planar waveguide region and the curved edge region are bonded together with adhesive to obtain the curved optical lens.

11. The manufacturing method as described in claim 10, characterized in that, The step of bonding the planar waveguide region and the curved edge region with adhesive to obtain the curved optical lens includes: The planar waveguide region and the curved edge region are bonded together with adhesive to form a planar waveguide region and a curved edge region bonded by an optical adhesive layer; The optical adhesive layer is subjected to ultraviolet curing to obtain a cured optical adhesive layer; The cured optical adhesive layer is then surface-polished to obtain a polished optical adhesive layer. The polished optical adhesive layer is coated to obtain the curved optical lens.

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