Lens and optical lens

Abstract

The utility model provides a lens and an optical lens. The lens comprises an optical effective part and an optical structure part, the optical structure part surrounds the optical effective part, at least one part of the outer side end, away from the optical effective part, of the optical structure part is provided with a diffuse reflection surface, and the outer ring surface of the lens serves as a part of the diffuse reflection surface. The utility model solves the problem that the lens in the prior art is easy to generate stray light.

Description

Technical Field

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

[0002] Currently, with the development of imaging technology, various electronic products have imaging capabilities. Devices such as mobile phones, cameras, smartwatches, AR / VR glasses, and smart glasses all commonly use lenses, especially convex lenses, plane mirrors, and concave lenses, to achieve functions such as light refraction, reflection, and focusing. Currently, some lenses, in pursuit of a wider field of view and higher resolution, have certain lens elements designed with a large bevel angle, meaning a steep angle between the lens surface and the optical axis. However, while this design helps achieve wide angles and high resolution, it also introduces stray light problems. The large bevel angle causes multiple reflections of light within the lens, and these reflected rays, if uncontrolled, form stray light, negatively impacting image quality. Utility Model Content

[0003] The main purpose of this invention is to provide a lens and an optical lens to solve the problem of stray light easily generated by lenses in the prior art.

[0004] To achieve the above objectives, according to one aspect of the present invention, a lens is provided, comprising:

[0005] Optical effective part;

[0006] An optical structure portion surrounds an optical effective portion, and at least a portion of the outer end of the optical structure portion away from the optical effective portion has a diffuse reflective surface, with the outer ring surface of the lens being part of the diffuse reflective surface.

[0007] Furthermore, the length of the outer circumference of the lens along the direction parallel to the central axis of the lens is greater than or equal to 0.1 mm and less than or equal to 0.15 mm.

[0008] Furthermore, the outer end of the optical structure also includes a first draft surface, which is located on the object side of the outer annular surface and is connected to the object side end of the outer annular surface. The first draft surface is part of the diffuse reflection surface.

[0009] Furthermore, the angle between the first draft surface and the outer annular surface is greater than 20° and less than 41°; and / or the diffuse reflection surface also includes a first connecting surface segment, the first connecting surface segment being located on the object side of the first draft surface, the first connecting surface segment being connected to the end of the first draft surface away from the outer annular surface, and the first connecting surface segment extending from the first draft surface in a direction close to the central axis of the lens.

[0010] Furthermore, the outer end of the optical structure also includes a second draft surface, which is located on the image side of the outer ring surface and is connected to the image side end of the outer ring surface. The second draft surface is part of the diffuse reflection surface.

[0011] Furthermore, the angle between the second draft surface and the outer annular surface is greater than 10° and less than 40°; and / or the diffuse reflection surface also includes a second connecting surface segment, which is located on the image side of the second draft surface, is connected to the end of the second draft surface away from the outer annular surface, and extends from the second draft surface in a direction close to the central axis of the lens.

[0012] Furthermore, the roughness of the diffuse reflective surface is greater than or equal to 0.25 μm and less than or equal to 0.3 μm.

[0013] Furthermore, the sagitta of the image side of the lens is greater than 0.8 mm.

[0014] Furthermore, the thickness ratio of the lens is greater than or equal to 2 and less than or equal to 2.5, wherein the thickness ratio of the lens is the ratio of the thickness of the thickest point of the lens to the thickness of the thinnest point of the lens.

[0015] According to another aspect of the present invention, an optical lens is provided, comprising at least one of the aforementioned lenses.

[0016] The lens using the technical solution of this utility model includes an optical effective part and an optical structural part. The optical structural part surrounds the optical effective part, and at least a portion of the outer end of the optical structural part away from the optical effective part has a diffuse reflection surface. The outer ring surface of the lens is part of the diffuse reflection surface.

[0017] Outside the effective optical element, a surrounding optical structure is formed. At least a portion of its outer end, furthest from the effective optical element, is treated as a diffuse reflective surface. Light encountering this surface is scattered instead of following a regular reflection path, reducing internal reflection and thus lowering stray light intensity. The diffuse reflective surface can be considered a beam management mechanism. It can re-scatter light that might otherwise cause stray light back outside the optical path or scatter it to areas that will not significantly affect imaging, effectively controlling the direction and distribution of light and preventing interference with the main imaging beam. By addressing the stray light problem during the lens design phase, the need for subsequent lens design components such as anti-reflective coatings and lens hoods can be reduced. This not only reduces lens complexity and cost but also simplifies the assembly process and improves the overall stability and reliability of the optical system. Attached Figure Description

[0018] 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:

[0019] Figure 1 A schematic diagram of the lens structure of an optional embodiment of the present invention is shown;

[0020] Figure 2 It shows Figure 1 Simulated surface profile curve of the middle lens;

[0021] Figure 3 A schematic diagram of the lens structure of another alternative embodiment of the present invention is shown;

[0022] Figure 4 It shows Figure 3 Simulated surface profile curve of the middle lens;

[0023] Figure 5 A schematic diagram of a lens structure is shown in comparison.

[0024] Figure 6 It shows Figure 5 Simulated surface profile curve of the middle lens;

[0025] Figure 7 A schematic diagram of a lens structure is shown in comparison.

[0026] Figure 8 It shows Figure 7 The surface shape simulation curve of the middle lens.

[0027] The above figures include the following reference numerals:

[0028] 10. Optical effective part; 20. Optical structural part; 30. Diffuse reflection surface; 31. Outer ring surface; 32. First draft surface; 33. First connecting surface segment; 34. Second draft surface; 35. Second connecting surface segment. Detailed Implementation

[0029] 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.

[0030] 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.

[0031] 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.

[0032] To address the problem of stray light easily generated by lenses in existing technologies, this invention provides a lens and an optical lens.

[0033] like Figure 1 and Figure 3 As shown, the lens includes an optical effective portion 10 and an optical structure portion 20. The optical structure portion 20 surrounds the optical effective portion 10. At least a portion of the outer end of the optical structure portion 20 away from the optical effective portion 10 has a diffuse reflection surface 30. The outer ring surface 31 of the lens is part of the diffuse reflection surface 30.

[0034] Outside the optical effective part 10, a surrounding optical structure 20 is formed. At least a portion of its outer end, away from the optical effective part 10, is treated as a diffuse reflective surface 30. Light encountering the diffuse reflective surface 30 is scattered instead of following a regular reflection path, reducing light reflection within the lens and thus lowering the intensity of stray light. The diffuse reflective surface 30 can be considered a beam management mechanism. It can re-scatter light that might otherwise cause stray light back outside the optical path or scatter it to an area that will not significantly affect imaging, thereby effectively controlling the direction and distribution of light and avoiding interference from these rays to the main imaging beam. By solving the stray light problem during the lens design stage, the need for adding anti-reflective coatings, lens hoods, and other optical components in subsequent lens designs can be reduced. This not only reduces the complexity and cost of the lens but also simplifies the assembly process and improves the overall stability and reliability of the optical system.

[0035] In some alternative embodiments, such as Figure 1 As shown, the length L of the outer annular surface 31 of the lens along the direction parallel to the central axis of the lens is greater than or equal to 0.1 mm and less than or equal to 0.15 mm. The length of the outer annular surface 31 in contact with the mold directly affects the friction and resistance during the demolding process. When the length L of the outer annular surface 31 is greater than or equal to 0.1 mm and less than or equal to 0.15 mm, the contact area between the lens and the mold during demolding is reduced. This means a reduction in demolding resistance, which facilitates a smoother and more uniform release of the lens from the mold, reduces deformation of the lens surface during demolding, and improves the molding quality of the lens. In addition, reducing the length L also helps to reduce the risk of air being drawn into the space between the lens and the mold during demolding, avoiding the formation of air bubbles or surface defects, further improving the quality of the lens.

[0036] Furthermore, the length L of the outer ring surface 31 of the lens is greater than or equal to 0.1 mm and less than or equal to 0.15 mm, meaning the lens structure is more compact, which helps reduce the chance of light reflection at the outer ring surface 31. Since light enters the lens from the side and enters the interior, some light will be directed towards the outer ring surface 31. An excessively long outer ring surface 31 increases the reflective area for this portion of light, exacerbating the stray light problem. By limiting the length of the outer ring surface 31, it is more difficult for light to form harmful internal reflections, thereby reducing stray light generation and improving the overall optical performance of the lens.

[0037] In optical design, the size and shape of the lens have a profound impact on the entire optical system. The smaller length of the outer ring 31 allows for greater flexibility in lens design, enabling more precise control over the incident and exit paths of light and optimizing the lens's optical properties. This not only helps improve stray light but also allows for a more compact and lightweight lens design while maintaining high performance requirements such as high pixel count and wide field of view.

[0038] In some alternative embodiments, such as Figure 1 and Figure 3 As shown, the outer end of the optical structure 20 also includes a first draft surface 32. The first draft surface 32 is located on the object side of the outer ring surface 31 and is connected to the object side end of the outer ring surface 31. The first draft surface 32 is part of the diffuse reflection surface 30. The design of the first draft surface 32 as part of the diffuse reflection surface means that when light enters from the object side and touches this surface, the originally regular reflection will be broken, and the light will be scattered in multiple directions. In optical design, especially in high-pixel VR lenses with large slope angles, this diffuse reflection treatment can effectively reduce multiple reflections of light inside the lens, thereby reducing the generation of stray light. As part of the diffuse reflection surface, the design of the first draft surface 32 helps to control the surface shape of the lens during the drafting process. During the molding process, if the angle and surface treatment of the first draft surface 32 are not appropriate, it may cause local stress concentration in the lens during demolding, affecting the consistency and accuracy of the lens surface shape. By designing the first draft surface 32 as a surface with diffuse reflection, the influence of this local stress can be reduced, ensuring that the lens maintains a good surface shape after drafting, which is crucial for the high precision requirements of lens surface shape in high-pixel VR lenses.

[0039] Furthermore, the first draft surface 32 is connected to the object-side end of the outer ring surface 31. As part of the lens structure, it not only considers the requirements of the molding process but also takes into account the optical performance of the lens. This design, by controlling the geometry and surface characteristics of the first draft surface 32, can optimize the incident and exit paths of light while ensuring the structural strength of the lens, reducing the negative impact on image quality and contributing to the realization of a compact VR lens design with low stray light.

[0040] In some alternative embodiments, the included angle θ between the first draft surface 32 and the outer annular surface 31 is greater than 20° and less than 41°. In thermoforming or injection molding, the demolding stage of the lens from the mold is a crucial step determining the lens's surface accuracy and overall quality. By designing the included angle θ between the first draft surface 32 and the outer annular surface 31 to be greater than 20° and less than 41°, smoother separation of the lens from the mold during demolding can be ensured. This angle design reduces the contact area between the lens and the mold, thereby reducing demolding resistance, avoiding surface damage or deformation of the lens due to demolding difficulties, and improving the molding accuracy and yield of the lens.

[0041] From the perspective of controlling stray light direction, stray light is a crucial factor affecting lens image quality, especially in VR lenses. A large field of view design can easily lead to internal reflections of edge light, creating stray light. The larger angle between the first draft surface 32 and the outer ring surface 31 reduces light reflection from the lens sides, particularly after lens molding, where slight surface deviations can cause these sides to become additional light-reflecting surfaces. By controlling this angle, the light scattering effect from the lens sides is weakened, preventing them from becoming a source of stray light, thereby improving the lens's image sharpness and contrast.

[0042] Furthermore, the structural strength of the lens is crucial for its stability and durability in VR devices. An angle θ between the first draft surface 32 and the outer annular surface 31 is greater than 20° and less than 41°, which helps to form a more robust edge structure and enhances the edge strength of the lens. This not only reduces accidental damage to the lens during assembly or use but also reduces lens surface shape deviation caused by stress to a certain extent, ensuring stable optical performance of the lens during long-term use.

[0043] In the lens manufacturing process, the design and manufacture of the mold are also crucial factors affecting lens quality. The larger angle between the first draft surface 32 and the outer ring surface 31 simplifies the mold's complexity, making its manufacture easier and reducing the difficulty and cost of mold production. Simultaneously, this design also reduces mold wear during demolding, extending its lifespan and thus lowering the frequency and cost of mold replacements in long-term production.

[0044] In some alternative embodiments, the diffuse reflective surface 30 further includes a first connecting segment 33 located on the object side of the first draft surface 32. The first connecting segment 33 is connected to the end of the first draft surface 32 away from the outer annular surface 31, and extends from the first draft surface 32 towards the central axis of the lens. This structure effectively changes the reflection path of light on the side of the lens. Due to the large slope angle design, the side of the lens is prone to internal reflection. The introduction of the diffuse reflective surface 30, coupled with the special position of the first connecting segment 33, can convert the reflected light that might otherwise form a regular path into multi-directional diffuse reflected light, reducing the possibility of harmful light re-entering the optical effective part 10, thereby reducing the intensity of stray light. Through the combination of the first connecting segment 33 and the first draft surface 32, the optical path can be managed more precisely. The design of the first connecting surface segment 33 can not only control the light rays incident from the object side, but also affect the scattering direction of the light rays incident from the side, ensuring that these scattered rays do not interfere with the main optical path. At the same time, it can improve the light throughput efficiency of the lens to a certain extent and reduce light loss, thereby improving image clarity while maintaining good brightness and color reproduction.

[0045] Furthermore, during the lens forming process, the first connecting surface segment 33 helps reduce adhesion between the lens and the mold. Since it extends from the first draft surface 32 towards the central axis, it reduces the direct contact area between the lens side and the mold, preventing defects such as cracks and deformation caused by stress concentration during demolding. This ensures the accuracy of the lens surface shape and directly improves the lens's optical performance. Moreover, the position and design of the first connecting surface segment 33 promotes uniform shrinkage of the lens during demolding.

[0046] In some alternative embodiments, the outer end of the optical structure 20 further includes a second draft surface 34, located on the image side of the outer ring surface 31. The second draft surface 34 is connected to the image side end of the outer ring surface 31 and serves as part of the diffuse reflection surface 30. In VR lens design, stray light is easily generated at the image side edge of the lens, especially when the slope angle of the lens increases, the light reflection inside the lens becomes more complex, leading to an increase in stray light intensity. The second draft surface 34, through its diffuse reflection surface characteristics, can scatter light rays incident on the image side edge of the lens into multiple directions, rather than reflecting them back to the optical effective part 10 in a straight line, thereby significantly reducing stray light generation. This design is particularly effective for high-angle incident light on the image side, effectively reducing its impact on the imaging quality of the optical system. The design of the second draft surface 34 not only reduces stray light but also allows for more precise management of the optical path. The diffuse reflection surface can guide light to non-imaging areas, avoiding flare or ghosting phenomena, while maintaining the clarity and contrast of the main optical path. This design helps to maintain high pixel count and wide field of view without sacrificing image quality, and is one of the key technologies for improving the optical performance of VR lenses.

[0047] Furthermore, the second draft surface 34 connects to the image-side end of the outer annular surface 31, and its design also takes into account the structural strength of the lens. Appropriate draft angles and surface treatments can enhance the structural stability of the lens edge, reducing wear or damage to the lens edge during assembly or use. This is particularly important for maintaining the long-term optical performance of the lens, especially in the context of frequent use of VR devices and mobile environments.

[0048] In some alternative embodiments, the angle β between the second draft surface 34 and the outer ring surface 31 is greater than 10° and less than 40°. In VR lenses, a large slope angle design increases the chance of light reflection inside the lens, resulting in stray light and affecting image quality. Designing the angle β between the second draft surface 34 and the outer ring surface 31 to be greater than 10° and less than 40°, combined with its unique diffuse reflection treatment, effectively controls the path of stray light. When light hits the second draft surface 34 at this small angle, even with specular reflection, its direction changes significantly, making it difficult for it to re-enter the optical effective part 10, thus reducing the interference of stray light on image sharpness. Simultaneously, controlling the angle β within the range of greater than 10° and less than 40° facilitates lens separation from the mold, thereby improving lens manufacturing yield and surface quality.

[0049] In some alternative embodiments, such as Figure 1 and Figure 3As shown, the diffuse reflection surface 30 also includes a second connecting surface segment 35, which is located on the image side of the second draft surface 34. The second connecting surface segment 35 is connected to the end of the second draft surface 34 away from the outer ring surface 31, and extends from the second draft surface 34 towards the central axis of the lens. This design can effectively reduce light scattering and internal reflection on the image side of the lens. When light is emitted from the imaging area on the object side of the lens and comes into contact with the second draft surface 34, the second connecting surface segment 35, as part of the diffuse reflection surface, transforms the potentially regular reflected light into multi-directional diffuse reflected light through special surface treatment (such as roughening treatment), effectively reducing stray light generation and improving the image quality of the VR lens under high pixel and wide field of view conditions. The connection design between the second connecting surface segment 35 and the second draft surface 34 helps improve the demolding performance of the lens during thermoplastic or injection molding processes. A smaller contact surface length (e.g., the length of the outer ring surface 31 along the direction parallel to the lens central axis is less than or equal to 0.15 mm) and an optimized draft angle (e.g., the angle between the second draft surface 34 and the outer ring surface 31 is greater than 10° and less than 40°), combined with the special position of the second connecting surface section 35, can reduce friction between the lens and the mold, avoiding scratches or lens deformation on the lens surface during demolding, thereby improving the molding quality of the lens. Furthermore, the diffuse reflection treatment of the second connecting surface section 35 reduces the surface finish requirements of the molded lens, simplifies subsequent processing steps, and lowers manufacturing costs.

[0050] Specifically, the second connecting surface segment 35 is positioned so that it extends from the second draft surface 34 toward the central axis of the lens, providing greater flexibility for optical design. This design allows the lens to maintain high pixel count and a wide field of view while optimizing the optical path and reducing stray light generation by adjusting the geometric parameters (such as angle and length) of the second connecting surface segment 35.

[0051] Furthermore, the extension of the second connecting surface segment 35 near the central axis of the lens facilitates the support of the lens against other structures. Simultaneously, the diffuse reflection treatment of the second connecting surface segment 35 can resolve some stray light issues during the lens forming stage, reducing the need for subsequent additional anti-light scattering treatments (such as lens hoods, anti-reflective coatings, etc.). This not only simplifies the lens assembly process and reduces overall manufacturing costs but also improves the integration of the optical system, making miniaturization and weight reduction of VR lenses possible.

[0052] In some alternative embodiments, the roughness of the diffuse reflective surface 30 is greater than or equal to 0.25 μm and less than or equal to 0.3 μm. The roughness of the diffuse reflective surface directly affects the light scattering characteristics. When the roughness is between 0.25 μm and 0.3 μm, the surface microstructure can effectively scatter stray light that might otherwise produce multiple reflections inside the lens. This scattering effect distributes the energy of the light evenly in multiple directions, reducing direct interference with the imaging light, thereby significantly reducing the impact of stray light on image sharpness and contrast.

[0053] Laser atomization is an effective means of achieving specific surface roughness. Setting the surface roughness between 0.25μm and 0.3μm means that this technology can fully utilize the advantages of laser atomization, obtaining a lens surface with stable scattering characteristics by precisely controlling the laser power, frequency, and scanning path. This processing method is not only suitable for small-batch production but also adaptable to the requirements of large-scale production, ensuring consistent optical performance for each lens.

[0054] In some alternative embodiments, the image-side sag T of the lens is greater than 0.8 mm. A high sag design optimizes the angle at which light enters the lens from the edge regions, which is crucial for light management. When light enters at a larger angle, it can be focused onto the sensor through a more complex optical path, helping to improve the utilization of edge pixels and enhance the sharpness and contrast of image edges. This is particularly important in high-pixel VR lenses, where a large sag contributes to improved image quality consistency.

[0055] The increased sagittal height design makes the edge area of ​​the lens more prominent, which provides new opportunities for controlling stray light. By designing specific diffuse reflective surfaces 30 (such as draft surfaces) at the lens edge, internal reflection of edge light can be effectively reduced, stray light generation can be decreased, thereby avoiding flare or ghosting in the image and improving image quality. Especially in VR applications with high-precision imaging requirements, controlling stray light is crucial for obtaining high-definition images.

[0056] During lens molding, a larger sagitta implies a more complex lens thickness and edge structure. To ensure the lens maintains its designed geometry and optical performance after molding, precise control of molding parameters is required, especially during the demolding stage. Designs with an image-side sagitta T greater than 0.8 mm necessitate specialized mold design and molding processes during injection molding or thermoforming to reduce stress concentration during molding, ensure the accuracy of the lens surface shape, and thus improve lens yield and optical performance.

[0057] In some alternative embodiments, the lens thickness ratio is greater than or equal to 2 and less than or equal to 2.5, where the thickness ratio is the ratio of the thickness of the thickest point of the lens to the thickness of the thinnest point. In optical design, the control of the thickness ratio directly affects the image quality and correction of optical aberrations. A higher thickness ratio means that the thickness distribution of the lens is more uneven, which can be used to design lenses with specific optical properties, such as aspherical lenses, to correct spherical aberration, coma, and chromatic aberration. In high-resolution VR lenses, by finely adjusting the thickness ratio, designers can optimize the refraction path of light on the lens, thereby improving image sharpness and contrast, reducing edge distortion, and achieving higher quality imaging results.

[0058] In the injection molding or thermoplastic molding process of lenses, controlling the thickness ratio is crucial to avoiding internal stress concentration and reducing molding defects. An appropriate thickness ratio (2–2.5) ensures that the lens maintains good geometric stability and structural strength after molding, reducing lens surface deviations caused by uneven cooling rates. This helps improve lens molding yield, reduces the need for subsequent processing and correction, lowers production costs, and increases production efficiency.

[0059] Furthermore, a lens thickness ratio between 2 and 2.5 enhances the lens's structural strength, especially in the edge areas, which is particularly important for high-resolution VR lenses. High-resolution lenses often require a larger field of view, and a large field of view design is usually accompanied by thicker edge areas. This not only resists deformation caused by external impacts or temperature changes but also significantly improves the positioning accuracy of the lens during assembly and its reliability in long-term use.

[0060] In an alternative embodiment, the diffuse reflective surface 30 is formed by laser atomization.

[0061] exist Figure 1 This is a schematic diagram of the structure of a lens that meets the requirements for both stray light and release retardation. Figure 5 This is a structural diagram of a lens that meets the requirements for stray light emission but fails the release reticle test. Figure 1 The lens shown is Figure 5 The lenses shown have similar structures. The angle θ between the first draft surface 32 and the outer ring surface 31 is greater than 20° and less than 41°. The length L of the outer ring surface 31 along the direction parallel to the central axis of the lens is less than or equal to 0.15 mm. The sag T of both is greater than 0.8 mm. However, the angle β between the second draft surface 34 and the outer ring surface 31 is different. Figure 1 The included angle β is greater than 10° and less than 40°. Figure 5 The included angle β is greater than 40°. From... Figure 2 and Figure 6The surface simulation curves show that when the included angle β is greater than 40°, the red and blue lines do not overlap well, resulting in poor rotational symmetry after processing, large surface errors, and severely affecting the imaging clarity in both directions. Figure 1 In the figure, the included angle θ is 24°, the length L is 0.15 mm, the sag T is 0.833 mm, and the included angle β is 35°. Figure 2 In the surface simulation curve diagram, the red and blue lines have a high degree of overlap, resulting in good rotational symmetry after processing and small surface error. Figure 5 In the figure, the included angle θ is 24°, the length L is 0.15 mm, the sag T is 0.833 mm, and the included angle β is 49.2°. Figure 6 In the surface simulation curve, the red and blue lines do not overlap well, resulting in poor rotational symmetry after processing and a large surface error, which seriously affects the imaging clarity in both directions.

[0062] exist Figure 3 This is a schematic diagram of the structure of a lens that meets the requirements for both stray light and release retardation. Figure 7 This is a structural diagram of a lens that meets the stray light requirement but fails the release reticle requirement. Figure 3 In the illustrated embodiment, the angle θ between the first draft surface 32 and the outer ring surface 31 of both lenses is greater than 20° and less than 41°, the angle β between the second draft surface 34 and the outer ring surface 31 of both lenses is less than 40°, and the sag T of both lenses is greater than 0.8 mm. However, the length L of the outer ring surface 31 of the two lenses along the direction parallel to the central axis of the lens is different. Figure 3 The length L in the middle is greater than or equal to 0.1 mm and less than or equal to 0.15 mm. Figure 7 The length L in the middle is greater than 0.15 mm. From Figure 4 and Figure 8 The surface simulation curves show that when the included angle β is greater than 40°, the red and blue lines do not overlap well, resulting in poor rotational symmetry after processing, large surface errors, and severely affecting the imaging clarity in both directions. Figure 3 In the figure, the included angle θ is 22°, the length L is 0.15 mm, the sag T is 1.019 mm, and the included angle β is 15°. Figure 4 In the surface simulation curve diagram, the red and blue lines have a high degree of overlap, resulting in good rotational symmetry after processing and small surface error. Figure 7 In the figure, the included angle θ is 43°, the length L is 0.209 mm, the sag T is 1.019 mm, and the included angle β is 21°. Figure 8 In the surface simulation curve, the red and blue lines do not overlap well, resulting in poor rotational symmetry after processing and a large surface error, which seriously affects the imaging clarity in both directions.

[0063] According to another aspect of this utility model, an optical lens is provided, comprising at least one of the aforementioned lenses. By employing the lens of this application, the optical lens can effectively reduce edge light scattering and stray light, improve image quality, and simultaneously enhance the structural strength and dust resistance of the lens, enabling the lens to maintain good optical performance in various environments. For example, the optical lens is a VR lens.

[0064] 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.

[0065] 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.

[0066] 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.

[0067] 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 lens, characterized in that, include: Optical effective part (10); An optical structure (20) surrounds the optical effective part (10), and at least a portion of the outer end of the optical structure (20) away from the optical effective part (10) has a diffuse reflection surface (30), and the outer ring surface (31) of the lens is part of the diffuse reflection surface (30).

2. The lens according to claim 1, characterized in that, The length of the outer ring surface (31) of the lens along the direction parallel to the central axis of the lens is greater than or equal to 0.1 mm and less than or equal to 0.15 mm.

3. The lens according to claim 1, characterized in that, The outer end of the optical structure (20) also includes a first draft surface (32), which is located on the object side of the outer ring surface (31). The first draft surface (32) is connected to the object side end of the outer ring surface (31), and the first draft surface (32) is a part of the diffuse reflection surface (30).

4. The lens according to claim 3, characterized in that, The angle between the first draft surface (32) and the outer annular surface (31) is greater than 20° and less than 41°; and / or The diffuse reflective surface (30) further includes a first connecting surface segment (33), which is located on the object side of the first draft surface (32). The first connecting surface segment (33) is connected to the end of the first draft surface (32) away from the outer ring surface (31), and the first connecting surface segment (33) extends from the first draft surface (32) toward the central axis of the lens.

5. The lens according to claim 1, characterized in that, The outer end of the optical structure (20) also includes a second draft surface (34), which is located on the image side of the outer ring surface (31). The second draft surface (34) is connected to the image side end of the outer ring surface (31) and serves as part of the diffuse reflection surface (30).

6. The lens according to claim 5, characterized in that, The angle between the second draft surface (34) and the outer annular surface (31) is greater than 10° and less than 40°; and / or The diffuse reflective surface (30) further includes a second connecting surface segment (35), which is located on the image side of the second draft surface (34). The second connecting surface segment (35) is connected to one end of the second draft surface (34) away from the outer ring surface (31), and the second connecting surface segment (35) extends from the second draft surface (34) toward the central axis of the lens.

7. The lens according to any one of claims 1 to 6, characterized in that, The roughness of the diffuse reflective surface (30) is greater than or equal to 0.25 μm and less than or equal to 0.3 μm.

8. The lens according to any one of claims 1 to 6, characterized in that, The image-side height of the lens is greater than 0.8 mm.

9. The lens according to any one of claims 1 to 6, characterized in that, The thickness ratio of the lens is greater than or equal to 2 and less than or equal to 2.5, wherein the thickness ratio of the lens is the ratio of the thickness of the thickest point of the lens to the thickness of the thinnest point of the lens.

10. An optical lens, characterized in that, It includes at least one lens as described in any one of claims 1 to 9.

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