Gluing lens and optical lens

Abstract

The utility model provides a balsaming lens. The cemented lens at least comprises a first lens and a second lens which are cemented, each of the first lens and the second lens is provided with an optical effective area and an optical structure area, the surface of one side, facing the second lens, of the optical structure area of the first lens is provided with a plurality of first limiting structures, and the first limiting structures are arranged at intervals in the circumferential direction of the optical effective area; the surface of the side, facing the first lens, of the optical structure area of the second lens is provided with a plurality of second limiting structures matched with the first limiting structures, one of the first limiting structures and the second limiting structures is a limiting groove, and the other one of the first limiting structures and the second limiting structures is a limiting protrusion. According to the utility model, the problem of eccentricity of the balsaming lens in the prior art is solved.

Description

Technical Field

[0001] This utility model relates to the field of optical imaging equipment technology, and more specifically, to a cemented lens and an optical lens. Background Technology

[0002] Currently, with the continuous advancement and application of Mixed Reality (MR) technology, especially the widespread use of large-aperture cemented lenses in MR products, the precision requirements for optical assembly are increasing. Cemented lenses, as a common method of assembling optical components, involve bonding two or more lenses together using optical adhesives to achieve specific optical properties. However, during the bonding process, especially when handling large-aperture lenses, aligning the optical center becomes a major challenge in assembly. Poor center alignment during bonding will lead to misalignment of the bonded parts, severely affecting the optical quality of the final product.

[0003] In other words, existing cemented lenses suffer from eccentricity. Utility Model Content

[0004] The main objective of this invention is to provide a cemented lens to solve the problem of eccentricity in existing cemented lenses.

[0005] To achieve the above objectives, according to one aspect of the present invention, a cemented lens is provided, comprising at least a cemented first lens and a second lens. Both the first lens and the second lens have an optically effective area and an optical structural area. The surface of the optical structural area of ​​the first lens facing the second lens has a plurality of first limiting structures, which are circumferentially spaced around the optically effective area. The surface of the optical structural area of ​​the second lens facing the first lens has a plurality of second limiting structures that cooperate with the first limiting structures. One of the first limiting structures and the second limiting structure is a limiting groove, and the other of the first limiting structure and the second limiting structure is a limiting protrusion.

[0006] Furthermore, after the limiting groove and the limiting protrusion are assembled, the bottom surfaces of the limiting protrusion and the limiting groove are spaced apart.

[0007] Furthermore, the depth of the limiting groove is less than the height of the limiting protrusion, and the first lens and the second lens have two surfaces of the limiting groove and the limiting protrusion spaced apart to form an open space.

[0008] Furthermore, the height E of the shelter space is greater than or equal to 0.14 mm and less than or equal to 0.5 mm.

[0009] Furthermore, the cemented lens satisfies at least one of the following:

[0010] The depth C of the limiting groove is greater than or equal to 0.7 mm and less than or equal to 1.78 mm;

[0011] The height D of the limiting protrusion is greater than or equal to 0.75 mm and less than or equal to 2 mm.

[0012] Furthermore, the area of ​​the cross-section of the limiting groove parallel to the groove opening gradually decreases from the groove opening towards the bottom surface of the limiting groove.

[0013] Furthermore, the limiting groove has a first abutting surface that abuts against the limiting protrusion, and the limiting protrusion has a second abutting surface that contacts the first abutting surface. One of the first abutting surface and the second abutting surface is a plane, and the other of the first abutting surface and the second abutting surface is an arc surface.

[0014] Furthermore, the limiting protrusion is a limiting hemisphere, and the sidewall of the limiting groove has at least two opposing abutting sidewalls that abut against the limiting protrusion. The distance between the two opposing abutting sidewalls gradually increases from the bottom of the limiting groove towards the opening of the limiting groove.

[0015] Furthermore, the two opposing abutting sidewalls have the same angle with the optical axis of the cemented lens, and the angle A between the abutting sidewalls and the optical axis is greater than or equal to 35° and less than or equal to 60°.

[0016] Furthermore, the cemented lens satisfies at least one of the following:

[0017] The radius F of the limiting hemisphere is greater than or equal to 0.75 mm and less than or equal to 2.0 mm;

[0018] The width G of the bottom surface of the limiting groove is greater than or equal to 0.1 mm and less than or equal to 1.69 mm;

[0019] The width H of the groove opening of the limiting groove is greater than or equal to 2.3 mm and less than or equal to 4.18 mm;

[0020] The length J of the limiting groove is greater than or equal to 2.0 mm and less than or equal to 5.52 mm;

[0021] Both the first and second lenses are truncated lenses.

[0022] According to another aspect of the present invention, an optical lens is provided, comprising the above-described cemented lens.

[0023] According to the technical solution of this utility model, the cemented lens includes at least a cemented first lens and a second lens. Both the first lens and the second lens have an optical effective area and an optical structure area. The side surface of the optical structure area of ​​the first lens facing the second lens has a plurality of first limiting structures, which are circumferentially spaced around the optical effective area. The side surface of the optical structure area of ​​the second lens facing the first lens has a plurality of second limiting structures that cooperate with the first limiting structures. One of the first limiting structures and the second limiting structure is a limiting groove, and the other of the first limiting structure and the second limiting structure is a limiting protrusion.

[0024] By setting a first limiting structure on the first lens and a second limiting structure on the second lens, the first and second lenses can be quickly aligned during assembly, reducing adjustment time and labor intensity during assembly, thus improving production efficiency and reducing production costs. During the cementing of the first and second lenses, the cooperation of the first and second limiting structures restricts their relative positions, ensuring coaxiality and reducing the risk of misalignment. Furthermore, one of the first and second limiting structures is designed as a limiting groove, and the other as a limiting protrusion. The precise fit between the groove and protrusion ensures that the relative positions of the first and second lenses are fixed during and after cementing, effectively avoiding misalignment caused by assembly errors. This ensures the optical center alignment of the cemented lens and improves image quality. The cooperation between the first and second limiting structures restricts relative rotation between the first and second lenses, preventing stray light and ghosting caused by lens position changes, further improving the imaging quality and user experience of the optical system. Attached Figure Description

[0025] The accompanying drawings, which form part of this application, are used to provide a further understanding of the present invention. The illustrative embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an undue limitation of the present invention. In the drawings:

[0026] Figure 1 A schematic diagram of the structure of an optical lens according to an optional embodiment of the present invention is shown;

[0027] Figure 2 A schematic diagram of the optical lens of another optional embodiment of the present invention is shown;

[0028] Figure 3 A schematic diagram showing the fitting relationship between the limiting groove and the limiting protrusion in an optional embodiment of the present invention is shown;

[0029] Figure 4A schematic diagram of the optical lens of Embodiment 1 of this utility model is shown;

[0030] Figure 5 It shows Figure 4 Enlarged view of point P in the middle;

[0031] Figure 6 It shows Figure 4 A schematic diagram of the structure of the first lens in the middle;

[0032] Figure 7 It shows Figure 4 A schematic diagram of the structure of the second lens in the middle;

[0033] Figure 8 A schematic diagram of the optical lens of Embodiment 2 of this utility model is shown;

[0034] Figure 9 It shows Figure 8 Enlarged view of point Q;

[0035] Figure 10 It shows Figure 8 A schematic diagram of the structure of the first lens in the middle;

[0036] Figure 11 It shows Figure 8 A schematic diagram of the structure of the second lens in the middle;

[0037] Figure 12 A schematic diagram of the optical lens of Embodiment 3 of this utility model is shown;

[0038] Figure 13 It shows Figure 12 Enlarged view of the middle W area;

[0039] Figure 14 It shows Figure 12 A schematic diagram of the structure of the first lens in the middle;

[0040] Figure 15 It shows Figure 12 A schematic diagram of the structure of the second lens.

[0041] The above figures include the following reference numerals:

[0042] 10. First lens; 11. First limiting structure; 20. Second lens; 21. Second limiting structure; 30. Optical effective area; 40. Optical structure area; 50. Limiting groove; 51. Abutting sidewall; 60. Limiting protrusion; 70. Clearance space; 80. Lens barrel. Detailed Implementation

[0043] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other. The present invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0044] It should be noted that, unless otherwise specified, all technical and scientific terms used in this application have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains.

[0045] In this utility model, unless otherwise stated, directional terms such as "upper," "lower," "top," and "bottom" are generally used in relation to the direction shown in the accompanying drawings, or in relation to the vertical, perpendicular, or gravitational direction of the component itself; similarly, for ease of understanding and description, "inner" and "outer" refer to the inner and outer contours of each component itself, but the above directional terms are not used to limit this utility model.

[0046] To address the problem of eccentricity in existing cemented lenses, this invention provides a cemented lens.

[0047] like Figures 1 to 15 As shown, the cemented lens includes at least a cemented first lens 10 and a second lens 20. Both the first lens 10 and the second lens 20 have an optical effective area 30 and an optical structure area 40. The side surface of the optical structure area 40 of the first lens 10 facing the second lens 20 has a plurality of first limiting structures 11, which are circumferentially spaced around the optical effective area 30. The side surface of the optical structure area 40 of the second lens 20 facing the first lens 10 has a plurality of second limiting structures 21 that cooperate with the first limiting structures 11. One of the first limiting structures 11 and the second limiting structure 21 is a limiting groove 50, and the other of the first limiting structure 11 and the second limiting structure 21 is a limiting protrusion 60.

[0048] By setting a first limiting structure 11 on the first lens 10 and a second limiting structure 21 on the second lens 20, the first lens 10 and the second lens 20 can be quickly aligned during assembly, reducing adjustment time and labor intensity during assembly, which is beneficial to improving production efficiency and reducing production costs. When the first lens 10 and the second lens 20 are cemented together, the cooperation of the first limiting structure 11 and the second limiting structure 21 restricts the relative position between the first lens 10 and the second lens 20, which helps to ensure that the first lens 10 and the second lens 20 are coaxial and reduces the risk of misalignment. Furthermore, one of the first limiting structure 11 and the second limiting structure 21 is designed as a limiting groove 50, and the other as a limiting protrusion 60. The precise cooperation between the limiting groove 50 and the limiting protrusion 60 ensures that the relative position of the first lens 10 and the second lens is fixed during and after cementation, effectively avoiding misalignment caused by assembly errors, thereby ensuring the optical center alignment of the cemented lens and improving image quality. The cooperation between the first limiting structure 11 and the second limiting structure 21 can limit the relative rotation between the first lens 10 and the second lens 20, which can avoid stray light and ghosting caused by lens position changes, and is conducive to further improving the imaging quality of the optical system and user experience.

[0049] This application, by providing a limiting groove 50 and a limiting protrusion 60 on the optical structure area 40 of the first lens 10 and the second lens 20, can limit the relative rotation between the first lens 10 and the second lens 20. This can effectively improve the eccentricity problem in the assembly process of large-aperture cemented lenses, improve assembly efficiency, enhance mechanical stability, optimize processing technology, and reduce the risk of stray light and ghosting. As a result, it can significantly improve the optical performance and production quality of cemented lenses, providing solid technical support for the miniaturization, high precision, and high performance of optical products.

[0050] Furthermore, the cooperation between the limiting groove 50 and the limiting protrusion 60 not only contributes to optics but also enhances the mechanical stability of the cemented lens. In reliability tests involving mechanical vibration and temperature changes, this structure reduces the risk of lens tilting, thereby improving the overall quality and reliability of the lens.

[0051] In some alternative embodiments, please refer to Figure 2 , Figure 3 , Figure 5 , Figure 9 and Figure 13After the limiting groove 50 and the limiting protrusion 60 are assembled, the bottom surfaces of the limiting protrusion 60 and the limiting groove 50 are spaced apart. This spacing between the bottom surfaces of the limiting groove 50 and the limiting protrusion 60 reduces the contact area between them, minimizing stress deformation caused by contact between the lenses, ensuring precise alignment between the lenses, guaranteeing the optical performance of the optical system, and reducing the risk of optical performance degradation due to mechanical stress.

[0052] Specifically, since the contact between the limiting protrusion 60 and the limiting groove 50 is limited to the outer peripheral surface of the limiting protrusion 60 contacting the sidewall of the limiting groove 50, and not the bottom surface of the limiting groove 50, this ensures that the positioning of the limiting protrusion 60 in the limiting groove 50 is stable, while avoiding problems such as lens deformation or assembly difficulties that may be caused by excessive tightness. This precise rotation control is crucial for optical systems, especially lens groups that require high-precision alignment. It helps improve the overall optical performance of the lens and reduces image quality problems caused by eccentricity and rotation.

[0053] Furthermore, during the assembly process, the contact area between the first lens 10 and the second lens 20 is reduced, which can reduce the friction during assembly and make the lenses easier to align and assemble.

[0054] In some alternative embodiments, please refer to Figure 5 , Figure 9 and Figure 13 The depth of the limiting groove 50 is less than the height of the limiting protrusion 60. The first lens 10 and the second lens 20 have two surfaces with the limiting groove 50 and the limiting protrusion 60 spaced apart to form a clearance space 70. Since the depth of the limiting groove 50 is less than the height of the limiting protrusion 60, the limiting protrusion 60 is embedded in the limiting groove 50 during assembly, avoiding direct contact between the two opposite sides of the first lens 10 and the second lens 20. This reduces relative positional changes caused by lens surface friction or minor deformation, and enhances the stability of the cemented lens during assembly and use.

[0055] In some optional embodiments, the height E of the clearance space 70 is greater than or equal to 0.14 mm and less than or equal to 0.5 mm. This setting constrains the height of the clearance space 70, preventing it from being too large or too small and affecting the alignment and optical performance of the lens, thus reducing the decrease in optical performance caused by improper dimensions of the clearance space 70. If the height E of the clearance space 70 is too small, it may affect the limiting effect between the limiting groove 50 and the limiting protrusion 60. If the height E of the clearance space 70 is too large, it will result in an excessively large clearance space 70, which will be detrimental to the bonding between the first lens 10 and the second lens 20, affecting the bonding effect of the lenses. Therefore, controlling the height E of the clearance space 70 within the above range can balance the processing difficulty and the limiting effect, ensuring high efficiency and high quality in the processing, bonding, and assembly of the lens.

[0056] In some alternative embodiments, please refer to Figure 5 , Figure 9 and Figure 13 The depth C of the limiting groove 50 is greater than or equal to 0.7 mm and less than or equal to 1.78 mm. Limiting the depth of the limiting groove 50 ensures that the limiting protrusion 60 is accurately embedded within the limiting groove 50 during assembly, achieving a stable limiting effect and preventing damage to the lens during assembly or use. If the depth of the limiting groove 50 is too small, the space within the limiting groove 50 will be too small, which may not provide sufficient limiting effect, leading to uncontrolled relative rotation between lenses. If the depth of the limiting groove 50 is too large, it will affect the structural strength of the lens, and may easily cause lens damage or deformation under excessive assembly pressure.

[0057] In some alternative embodiments, please refer to Figure 5 , Figure 9 and Figure 13 The protrusion height D of the limiting protrusion 60 is greater than or equal to 0.75 mm and less than or equal to 2 mm. Limiting the protrusion height D of the limiting protrusion 60 ensures that it accurately embeds into the limiting groove 50 during assembly, achieving a stable limiting effect while preventing damage to the lens during assembly or use. If the protrusion height D of the limiting protrusion 60 is too small, its height relative to the lens's outer diameter will be too low, resulting in insufficient limiting force to restrict the relative rotation of the lens, affecting the limiting effect and increasing the risk of lens eccentricity and rotation. If the protrusion height D of the limiting protrusion 60 is too large, it may generate excessive contact force during assembly, increasing the risk of lens deformation. Therefore, limiting the protrusion height D of the limiting protrusion 60 within a reasonable range ensures that it provides effective limiting without causing additional pressure or deformation to the lens, maintaining the stability and optical performance of the cemented lens.

[0058] In some alternative embodiments, please refer to Figure 2 , Figure 3 , Figure 5 , Figure 9 and Figure 13 The cross-sectional area of ​​the limiting groove 50, parallel to its opening, gradually decreases from the opening towards the bottom. This design, where the cross-sectional area of ​​the limiting groove 50 gradually decreases from the opening towards the bottom, is commonly referred to as a wedge or bevel design. When the limiting protrusion 60 is inserted into the limiting groove 50, the wedge-shaped design provides a guide plane for the protrusion 60, allowing it to naturally align with the centerline of the limiting groove 50 during entry, thus achieving precise lens positioning. This guiding effect is particularly important during assembly, significantly reducing manual alignment time and improving assembly efficiency. The wedge design increases the controllability of the contact area between the protrusion 60 and the limiting groove 50, making the position of the protrusion 60 within the groove more stable, reducing eccentricity and focusing problems caused by rotation, and improving the overall stability and image quality of the optical system. By using the beveled contact between the limiting protrusion 60 and the limiting groove 50, rather than direct surface contact, mechanical wear on the lens during assembly and use can be reduced. The beveled contact reduces friction at the contact point, helping to extend the lifespan of the cemented lens and reducing the frequency of maintenance and replacement.

[0059] It should be noted that the limiting groove 50 can also have the same width at all openings, and can be designed according to specific usage requirements. No specific restrictions are imposed here.

[0060] In some optional embodiments, the limiting groove 50 has a first abutting surface that abuts against the limiting protrusion 60, and the limiting protrusion 60 has a second abutting surface that contacts the first abutting surface. One of the first abutting surface and the second abutting surface is a plane, and the other is a curved surface. The cooperation between the plane and the curved surface achieves stable positioning of the lens during the bonding process, while reducing stress deformation caused by contact, improving the precision and stability of lens bonding, and reducing the degradation of optical performance caused by mechanical stress. The abutment between the curved surface and the plane reduces the contact area between the first abutting surface and the second abutting surface, reducing friction at the contact point, thereby reducing the risk of wear during lens assembly and use.

[0061] Furthermore, the combination of the flat and curved surfaces allows for point or line contact between the first and second contact surfaces, which can reduce the eccentricity problem caused by tolerances during lens manufacturing.

[0062] In some alternative embodiments, please refer to Figure 3The limiting protrusion 60 is a limiting hemisphere, and the sidewall of the limiting groove 50 has at least two opposing abutting sidewalls 51. The abutting sidewalls 51 abut against the limiting protrusion 60, and the distance between the two opposing abutting sidewalls 51 gradually increases from the bottom of the limiting groove 50 towards the opening of the limiting groove 50. This arrangement ensures point contact between the limiting protrusion 60 and the abutting sidewalls 51, achieving precise alignment and stable limiting of the lens during the bonding process. This effectively improves the bonding accuracy of the lens and reduces optical performance abnormalities caused by improper dimensions. The precise fit between the limiting protrusion 60 and the abutting sidewalls 51 reduces the risk of lens misalignment and rotation, optimizes optical axis alignment, and thus improves the imaging quality and performance of the optical system. Especially in MR (Mixed Reality) products or head-mounted display devices, this design can significantly reduce stray light and ghosting, improve image clarity, and enhance the user experience.

[0063] It should be noted that the shape of the limiting protrusion 60 can be an elliptical hemisphere, a cube, a cuboid, or even an irregular three-dimensional structure. The shape of the limiting protrusion 60 is not limited to a limiting hemisphere.

[0064] In some alternative embodiments, please refer to Figure 5 , Figure 9 and Figure 13 The two opposing abutting sidewalls 51 have the same angle with the optical axis of the cemented lens, and the angle A between the abutting sidewalls 51 and the optical axis is greater than or equal to 35° and less than or equal to 60°. Setting the angle between the two abutting sidewalls 51 and the optical axis is the same ensures the positioning accuracy of the first lens 10 and the second lens 20 around the Z-axis during assembly, avoiding lens eccentricity and rotation problems caused by angular asymmetry. Setting the angle A between the abutting sidewalls 51 and the optical axis in the range of 35° to 60° provides sufficient positioning effect, while ensuring that the positioning hemisphere can slide into the positioning groove 50, which is beneficial for the positioning protrusion 60 and the positioning groove 50 to be assembled together. If the angle A between the abutting sidewalls 51 and the optical axis is less than 35°, the portion of the positioning protrusion 60 entering the positioning groove 50 will be less, resulting in a poorer positioning effect. If the angle A between the abutting sidewall 51 and the optical axis is greater than 60°, it will be difficult for the abutting sidewall 51 to abut against the limiting protrusion 60, resulting in a poor limiting effect of the abutting sidewall 51 on the limiting protrusion 60, or even causing the limiting protrusion 60 and the limiting groove 50 to fail to cooperate.

[0065] In some alternative embodiments, please refer to Figure 5 , Figure 9 and Figure 13The radius F of the limiting hemisphere is greater than or equal to 0.75 mm and less than or equal to 2.0 mm. Limiting the radius F of the limiting hemisphere within a reasonable range ensures stable contact between the limiting protrusion 60 and the abutting sidewall 51 of the limiting groove 50 during reassembly. This contact not only accurately limits the relative rotation between lenses but also ensures the lens maintains positional stability under external forces, thereby improving the overall optical performance and reliability of the cemented lens, while also ensuring lens formation and preventing overturning.

[0066] In some alternative embodiments, please refer to Figure 5 , Figure 9 and Figure 13 The width G of the bottom surface of the limiting groove 50 is greater than or equal to 0.1 mm and less than or equal to 1.69 mm. This setting constrains the relationship between the width of the bottom surface of the limiting groove 50 and the corresponding lens, ensuring the reliability of the limiting groove 50 in limiting the limiting protrusion 60 without affecting the structural strength of the lens. If the width G of the bottom surface of the limiting groove 50 is less than 0.1 mm, the limiting force between the limiting groove 50 and the limiting protrusion 60 may be insufficient, causing the limiting protrusion 60 to slip off the limiting groove 50. If the width G of the bottom surface of the limiting groove 50 is greater than 1.69 mm, it is easy to make it difficult to guarantee the accuracy of the limiting groove 50 during manufacturing, or to affect the flexibility of positioning during assembly due to the excessive contact area. In addition, an excessively large limiting groove 50 can also easily affect the structural strength of the lens.

[0067] In some alternative embodiments, please refer to Figure 5 , Figure 9 and Figure 13 The width H of the groove opening of the limiting groove 50 is greater than or equal to 2.3 mm and less than or equal to 4.18 mm. If the width H of the groove opening of the limiting groove 50 is less than 2.3 mm, the limiting protrusion 60 will have difficulty entering the limiting groove 50, increasing assembly difficulty. If the width H of the groove opening of the limiting groove 50 is greater than 4.18 mm, the limiting force of the limiting groove 50 on the limiting protrusion 60 will be insufficient, making it easy for the limiting protrusion 60 to slip out of the limiting groove 50. Furthermore, the large area occupied by the limiting groove 50 can easily affect the structural strength and optical performance of the lens. Limiting the width H of the groove opening of the limiting groove 50 to the range of 2.3 mm to 4.18 mm can constrain the relationship between the limiting groove 50 and the corresponding lens, ensuring that the limiting groove 50 reliably limits the limiting protrusion 60 without affecting the structural strength of the lens.

[0068] In some alternative embodiments, please refer to Figure 6 , Figure 10 and Figure 14The length J of the limiting groove 50 is greater than or equal to 2.0 mm and less than or equal to 5.52 mm. If the length J of the limiting groove 50 is less than 2.0 mm, the length of the limiting groove 50 is too small, which is not conducive to the assembly of the limiting protrusion 60 and the limiting groove 50. If the length J of the limiting groove 50 is greater than 5.52 mm, the length of the limiting groove 50 is too large, which is not conducive to ensuring the structural strength and optical performance of the lens. Limiting the length J of the limiting groove 50 to within 2.0 mm to 5.52 mm can constrain the relationship between the limiting groove 50 and the corresponding lens, so as to ensure that the limiting groove 50 reliably limits the limiting protrusion 60 without affecting the structural strength of the lens.

[0069] In some alternative embodiments, both the first lens 10 and the second lens 20 are chamfered lenses. Chamfered lenses, by removing unnecessary material from the lens edges, can significantly reduce the size and weight of the lens, which is particularly important for applications requiring miniaturization and lightweight design, such as head-mounted displays, wearable devices, or high-precision cameras. The reduced size and weight not only improve the portability and comfort of the device but also reduce power consumption and increase response speed.

[0070] In some alternative embodiments, the number of limiting protrusions 60 is greater than or equal to three, and the number of limiting grooves 50 is greater than or equal to three, for example, four, five, six, etc.

[0071] In some alternative embodiments, please refer to Figure 7 , Figure 11 and Figure 15 As shown, there are three limiting protrusions 60. Two of the limiting protrusions 60 are located on the same side of the center of the lens, while the third limiting protrusion is located on the other side. The angle K formed between the two limiting protrusions 60 on the same side and the center of the lens is greater than or equal to 30° and less than or equal to 50°. The angle L formed between the two limiting protrusions 60 on different sides and the center of the lens is greater than or equal to 130° and less than or equal to 160°.

[0072] Example 1

[0073] like Figures 4 to 7 As shown, there are three limiting protrusions 60 and three limiting grooves 50, with two limiting protrusions 60 located on the same side of the center of the lens. Please refer to Table 1 for the parameters between the limiting protrusions 60 and the limiting grooves 50.

[0074] Example 2

[0075] The difference from Embodiment 1 is that the number and parameters of the limiting protrusions 60 and the limiting grooves 50 are different.

[0076] like Figures 8 to 11As shown, there are six limiting protrusions 60 and six limiting grooves 50, and the six limiting protrusions 60 are symmetrically arranged on both sides of the lens.

[0077] Example 3

[0078] The difference from Embodiment 1 is that the number and parameters of the limiting protrusions 60 and the limiting grooves 50 are different.

[0079] like Figures 12 to 15 As shown, there are four limiting protrusions 60 and four limiting grooves 50, and the four limiting protrusions 60 are symmetrically arranged on both sides of the lens.

[0080] Example / Parameters A(°) C(mm) D(mm) E(mm) F(mm) G(mm) H(mm) J(mm) K(°) L(°) Example 1 50 0.80 1.00 0.34 1.00 0.40 2.30 3.00 40 160 Example 2 60 0.70 0.75 0.14 0.75 0.10 2.52 2.00 30 150 Example 3 35 1.78 2.00 0.50 2.00 1.69 4.18 5.52 50 130

[0081] Table 1

[0082] In another alternative embodiment, the optical lens includes the aforementioned cemented lens. The optical lens also includes a lens barrel 80, within which the cemented lens is disposed. Optical lenses with the aforementioned cemented lenses offer advantages such as stable optical performance and high reliability. They effectively reduce the risk of lens tilt, improve lens quality and reliability, and are suitable for various devices requiring high-precision optical lenses, such as MR headsets and camera lenses, thus contributing to the development and application of optical technology.

[0083] As can be seen from the above description, the embodiments of this utility model achieve the following technical effects:

[0084] 1. This utility model can improve the assembly eccentricity problem caused by the bonding structure of large lenses and improve the assembly yield.

[0085] 2. This utility model can avoid performance abnormalities and stray light ghost image risks caused by unstable assembly.

[0086] 3. This invention can reduce the risk of lens tilting in mechanical and environmental reliability tests, and improve the stability of the optical lens.

[0087] Obviously, the embodiments described above are only some embodiments of this utility model, and not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort should fall within the protection scope of this utility model.

[0088] It should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the exemplary embodiments according to this application. As used herein, the singular form is intended to include the plural form as well, unless the context clearly indicates otherwise. Furthermore, it should be understood that when the terms "comprising" and / or "including" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof.

[0089] It should be noted that the terms "first," "second," etc., used in the specification, claims, and accompanying drawings of this application are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate so that the embodiments of this application described herein can be implemented in sequences other than those illustrated or described herein.

[0090] The above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A cemented lens, characterized in that, The cemented lens includes at least a cemented first lens (10) and a second lens (20), both of which have an effective optical area (30) and an optical structure area (40). The optical structure area (40) of the first lens (10) has a plurality of first limiting structures (11) on the side surface facing the second lens (20), and the plurality of first limiting structures (11) are arranged circumferentially around the optical effective area (30); The optical structure area (40) of the second lens (20) has a plurality of second limiting structures (21) that cooperate with the first limiting structure (11) on the side surface facing the first lens (10). One of the first limiting structure (11) and the second limiting structure (21) is a limiting groove (50), and the other of the first limiting structure (11) and the second limiting structure (21) is a limiting protrusion (60).

2. The cemented lens according to claim 1, characterized in that, After the limiting groove (50) and the limiting protrusion (60) are assembled, the limiting protrusion (60) and the bottom surface of the limiting groove (50) are spaced apart.

3. The cemented lens according to claim 1, characterized in that, The depth of the limiting groove (50) is less than the protrusion height of the limiting protrusion (60), and the first lens (10) and the second lens (20) have two surfaces of the limiting groove (50) and the limiting protrusion (60) spaced apart to form an open space (70).

4. The cemented lens according to claim 3, characterized in that, The height E of the shelter space (70) is greater than or equal to 0.14 mm and less than or equal to 0.5 mm.

5. The cemented lens according to claim 1, characterized in that, The cemented lens satisfies at least one of the following: The depth C of the limiting groove (50) is greater than or equal to 0.7 mm and less than or equal to 1.78 mm; The height D of the limiting protrusion (60) is greater than or equal to 0.75 mm and less than or equal to 2 mm.

6. The cemented lens according to claim 1, characterized in that, The area of ​​the cross-section of the limiting groove (50) parallel to the groove opening direction gradually decreases from the groove opening towards the bottom surface of the limiting groove (50).

7. The cemented lens according to claim 1, characterized in that, The limiting groove (50) has a first abutting surface that abuts against the limiting protrusion (60), and the limiting protrusion (60) has a second abutting surface that contacts the first abutting surface. One of the first abutting surface and the second abutting surface is a plane, and the other of the first abutting surface and the second abutting surface is an arc surface.

8. The cemented lens according to any one of claims 1 to 7, characterized in that, The limiting protrusion (60) is a limiting hemisphere, and the sidewall of the limiting groove (50) has at least two opposing abutting sidewalls (51). The abutting sidewalls (51) abut against the limiting protrusion (60), and the distance between the two opposing abutting sidewalls (51) gradually increases from the bottom of the groove of the limiting groove (50) towards the opening of the groove of the limiting groove (50).

9. The cemented lens according to claim 8, characterized in that, The two opposing abutting sidewalls (51) are at the same angle to the optical axis of the cemented lens, and the angle A between the abutting sidewalls (51) and the optical axis is greater than or equal to 35° and less than or equal to 60°.

10. The cemented lens according to claim 8, characterized in that, The cemented lens satisfies at least one of the following: The radius F of the limiting hemisphere is greater than or equal to 0.75 mm and less than or equal to 2.0 mm; The width G of the bottom surface of the limiting groove (50) is greater than or equal to 0.1 mm and less than or equal to 1.69 mm; The width H of the groove opening of the limiting groove (50) is greater than or equal to 2.3 mm and less than or equal to 4.18 mm; The length J of the limiting groove (50) is greater than or equal to 2.0 mm and less than or equal to 5.52 mm; Both the first lens (10) and the second lens (20) are chamfered lenses.

11. An optical lens, characterized in that, The cemented lens includes any one of claims 1 to 10.

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