Optical lens

Abstract

The utility model provides an optical lens. The optical lens includes: a lens barrel; the multiple lenses are sequentially arranged in the lens barrel in the extension direction of the optical axis, the lens, close to the end face of the image side of the lens barrel, of the multiple lenses is a bearing lens, the bearing lens comprises an optical effective part and an optical structure part surrounding the optical effective part, and the surface, facing the image side, of the optical structure part is provided with a dispensing structure. The distance from the dispensing structure to the optical axis is gradually reduced in the direction from the object side to the image side, and the dispensing structure comprises at least two dispensing faces arranged in the radial direction of the bearing lens. According to the utility model, the problem of poor stability of the optical 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 an optical lens. Background Technology

[0002] With the advancement of technology, the requirements for the reliability and image quality of optical lenses are constantly increasing. To ensure the stability of the lens position within the lens barrel, adhesive is usually applied between the lens and the lens barrel near the image side to improve the stability and reliability of the lens assembly. However, the adhesive is usually applied between the outer ring surface of the lens and the wall of the lens barrel. Because the adhesive shrinks during curing, it generates stress. When the adhesive cures on the outer ring surface of the lens, the bonding force of the adhesive to the lens is mainly tensile stress. This tensile stress is in the direction perpendicular to the outer ring surface, that is, in the radial direction. When the lens is subjected to an external force along the optical axis, this tensile stress is prone to failure, affecting the stability of the optical lens.

[0003] In other words, existing optical lenses suffer from poor stability. Utility Model Content

[0004] The main objective of this invention is to provide an optical lens to solve the problem of poor stability in existing optical lenses.

[0005] To achieve the above objectives, according to one aspect of the present invention, an optical lens is provided, comprising:

[0006] Lens tube;

[0007] Multiple lenses are arranged sequentially within the lens barrel along the extension direction of the optical axis. Among the multiple lenses, the lens closest to the image-side end face of the lens barrel is a support lens. The support lens includes an optical effective part and an optical structure part surrounding the optical effective part. The surface of the optical structure part facing the image side has a dispensing structure. The distance from the dispensing structure to the optical axis gradually decreases along the direction from the object side to the image side. The dispensing structure includes at least two dispensing surfaces arranged radially along the support lens.

[0008] Furthermore, the distance from each point of the adhesive surface to the optical axis gradually decreases along the direction from the object side to the image side.

[0009] Furthermore, the dispensing structure also includes at least one connecting surface for connecting the dispensing surfaces, the connecting surface being located between two adjacent dispensing surfaces and parallel to the optical axis.

[0010] Furthermore, at least two adhesive surfaces have the same angle with the optical axis.

[0011] Furthermore, the angle between the adhesive surface and the radial direction of the supporting lens is greater than or equal to 15° and less than or equal to 30°.

[0012] Furthermore, the roughness of the dispensing surface is greater than or equal to 0.2 μm and less than or equal to 0.3 μm.

[0013] Furthermore, the tilt length of the dispensing structure is greater than or equal to 0.2 mm and less than or equal to 0.25 mm.

[0014] Furthermore, the optical lens also includes an adhesive layer, and the inner wall surface of the lens barrel includes:

[0015] The bearing surface segment contacts the outer annular surface of the bearing lens.

[0016] The mating surface segment is closer to the image side end face than the supporting surface segment. The mating surface segment and the dispensing structure form a dispensing groove, and the adhesive layer is located inside the dispensing groove.

[0017] Furthermore, the distance from the mating surface segment to the optical axis gradually increases in the direction away from the bearing surface segment.

[0018] Furthermore, the angle between the mating surface segment and the optical axis is greater than or equal to 5 degrees and less than or equal to 10 degrees.

[0019] According to the technical solution of this utility model, the optical lens includes a lens barrel and multiple lenses. The multiple lenses are arranged sequentially in the lens barrel along the extension direction of the optical axis. Among the multiple lenses, the lens near the image side end face of the lens barrel is a support lens. The support lens includes an optical effective part and an optical structure part surrounding the optical effective part. The surface of the optical structure part facing the image side has a dispensing structure. The distance from the dispensing structure to the optical axis gradually decreases along the direction from the object side to the image side. The dispensing structure includes at least two dispensing surfaces arranged radially along the support lens.

[0020] By placing the dispensing structure on the image-side of the optical structure, its impact on the lens's imaging can be avoided. Furthermore, the distance from the dispensing structure to the optical axis gradually decreases from the object side to the image side, creating a larger adhesive contact area between the dispensing structure and the lens barrel. This facilitates uniform adhesive spread and reduces localized adhesive buildup during dispensing, thereby improving the lens's stability. Additionally, the dispensing structure has at least two dispensing surfaces to provide a larger adhesive contact area, allowing for better adhesion between the adhesive and the supporting lens and lens barrel, resulting in a stronger bond. The multiple dispensing surfaces also help distribute stress, preventing stress concentration and improving the overall connection stability between the supporting lens and lens barrel, effectively enhancing the lens's reliability. Attached Figure Description

[0021] 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:

[0022] Figure 1 A schematic diagram of an optical lens according to an alternative embodiment of the present invention is shown;

[0023] Figure 2 It shows Figure 1 Enlarged view of point P in the middle;

[0024] Figure 3 A schematic diagram of an optical lens according to another alternative embodiment of the present invention is shown;

[0025] Figure 4 It shows Figure 3 Enlarged view of point Q;

[0026] Figure 5 This diagram illustrates stray light generated when the adhesive structure inside an optical lens is too long, as shown in one example.

[0027] Figure 6 It shows Figure 5 A stray light pattern from a medium-sized optical lens.

[0028] The above figures include the following reference numerals:

[0029] 10. Lens barrel; 11. Supporting surface section; 12. Mating surface section; 13. Glue dispensing groove; 14. Transition surface section; 20. Supporting lens; 21. Glue dispensing structure; 211. Glue dispensing surface; 212. Connecting surface; 22. Anti-overflow glue surface section. Detailed Implementation

[0030] 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.

[0031] 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.

[0032] 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.

[0033] To address the problem of poor stability in existing optical lenses, this invention provides an optical lens.

[0034] like Figures 1 to 6As shown, the optical lens includes a lens barrel 10 and multiple lenses. The multiple lenses are arranged sequentially within the lens barrel 10 along the extension direction of the optical axis. Among the multiple lenses, the lens closest to the image-side end face of the lens barrel 10 is a support lens 20. The support lens 20 includes an optical effective part and an optical structure part surrounding the optical effective part. The surface of the optical structure part facing the image side has a dispensing structure 21. The distance from the dispensing structure 21 to the optical axis gradually decreases along the direction from the object side to the image side. The dispensing structure 21 includes at least two dispensing surfaces 211 arranged radially along the support lens 20.

[0035] By placing the dispensing structure 21 on the image-side of the optical structure, its influence on the lens's imaging can be avoided. Furthermore, the distance from the dispensing structure 21 to the optical axis gradually decreases from the object side to the image side, creating a larger adhesive contact area between the dispensing structure 21 and the lens barrel 10. This facilitates uniform adhesive spread and reduces localized adhesive buildup during dispensing, thereby improving the stability of the optical lens. Additionally, the dispensing structure 21 has at least two dispensing surfaces 211 to provide a larger adhesive contact area, allowing the adhesive to better adhere to the supporting lens 20 and the lens barrel 10, forming a stronger bond. The multiple dispensing surfaces 211 also help disperse stress and prevent stress concentration, thereby improving the overall connection stability between the supporting lens 20 and the lens barrel 10 and effectively enhancing the reliability of the optical lens.

[0036] In some alternative embodiments, please refer to Figure 2 The distance from each adhesive dot 211 to the optical axis gradually decreases along the direction from the object side to the image side. In other words, the adhesive dot 211 is an inclined plane. During adhesive curing, the adhesive force on the inclined plane is mainly manifested as shear stress. This shear stress is parallel to the inclined plane, which better resists the push-off force on the optical lens, effectively improving the stability of the optical lens. This inclined plane design allows the stress generated by the adhesive during curing to be distributed along the inclined plane direction, rather than concentrated on the outer ring surface of the supporting lens 20. This optimized stress distribution helps the adhesive to withstand external forces more evenly, reducing the problem of excessive local stress and improving the overall push-off force of the optical lens.

[0037] The dispensing structure 21 in this invention includes at least two dispensing surfaces 211, meaning that the dispensing structure 21 in this invention includes at least two inclined surfaces. Non-imaging light rays, after entering the optical lens, may form stray light due to reflection from internal lenses, lens barrels, etc. When these stray lights encounter multiple dispensing surfaces 211, the stray light will be reflected or refracted at each dispensing surface 211, further diverging the light. This causes the stray light that might have directly entered the sensor to deviate from its original path, reducing the amount of non-imaging light rays reaching the sensor and thus reducing the generation of stray light.

[0038] Furthermore, since the dispensing structure 21 includes multiple inclined planes, the reflection or refraction of light on each inclined plane is dispersed, which helps to reduce the formation of light spots on the sensor. That is, the intensity of stray light at a certain point will be significantly reduced, which is beneficial to improving the uniformity and contrast of imaging.

[0039] In some alternative embodiments, please refer to Figure 2 The dispensing structure 21 also includes at least one connecting surface 212 for connecting the dispensing surfaces 211, with the connecting surface 212 located between two adjacent dispensing surfaces 211. During the curing process, the adhesive generates stress. If this stress is too concentrated, it may cause deformation of the supporting lens 20 or the lens barrel 10, or even cracking of the adhesive layer. By providing the connecting surface 212, the stress during adhesive curing can be dispersed, allowing the adhesive to be distributed more evenly on the dispensing structure 21, improving the reliability of the bonding between the supporting lens 20 and the lens barrel 10, and thus improving the stability of the optical lens.

[0040] By providing a connecting surface 212 between two adjacent dispensing surfaces 211, non-imaging light rays can be further diffused or blocked. The dispensing surface 211 and the connecting surface 212 are set at an angle, allowing them to diffuse non-imaging light rays at different angles, changing the propagation direction of non-imaging light rays at different angles, further reducing the amount of non-imaging light rays reaching the sensor, thereby reducing the generation of stray light.

[0041] Specifically, the connecting surface 212 is parallel to the optical axis. This can be understood as the presence of a step difference between two adjacent adhesive surfaces 211. The step difference facilitates the demolding of the lens 20.

[0042] In some alternative embodiments, the dispensing surface 211 and the connecting surface 212 are rounded. This arrangement not only facilitates demolding with the lens but also helps control the flow path of the adhesive. The rounded transition makes the flow of adhesive between different inclined surfaces smoother, reduces the generation of air bubbles, and helps the adhesive to be evenly distributed on multiple inclined surfaces.

[0043] In some alternative embodiments, at least two dispensing surfaces 211 have the same angle with the optical axis. This arrangement facilitates the prediction and control of light paths, making stray light management more consistent and effective. Furthermore, because the dispensing surfaces 211 have the same tilt angle, the stress generated during adhesive curing can be distributed more evenly across the dispensing structure 21, reducing deformation of the supporting lens 20 or lens barrel 10 caused by uneven stress and improving the stability of the optical lens.

[0044] In some alternative embodiments, the angle θ between the adhesive dot surface 211 and the radial direction of the supporting lens 20 is greater than or equal to 15° and less than or equal to 30°. Non-imaging rays encountering the inclined surface can undergo significant deflection and scattering, effectively reducing stray light generation. Limiting the tilt angle of the adhesive dot surface 211 further facilitates changing the propagation direction of light, reducing stray light generation, and improving the imaging quality of the optical lens. Furthermore, limiting the angle θ between the adhesive dot surface 211 and the radial direction of the supporting lens 20 to the range of 15° to 30° helps increase the shear stress of the adhesive on the inclined surface, which in turn improves the push-out force of the optical lens and enhances its reliability.

[0045] In some optional embodiments, the roughness of the dispensing surface 211 is greater than or equal to 0.2 μm and less than or equal to 0.3 μm. Limiting the roughness Ra of the dispensing surface 211 to the range of 0.2 μm to 0.3 μm allows the dispensing surface 211 to provide more contact points, effectively increasing the contact area between the dispensing surface 211 and the adhesive, thereby improving the adhesion between the adhesive and the dispensing surface 211, and enhancing the bonding strength and reliability of the adhesive. By setting the dispensing surface 211 as a rough surface, it can scatter non-imaging light in various directions through diffuse reflection, thereby reducing the influence of stray light and improving the imaging quality of the optical lens.

[0046] Light spots are usually caused by concentrated reflection or refraction of light on a smooth surface. By setting the adhesive dotting surface 211 to a rough surface, this concentrated reflection can be reduced, thus reducing the generation of light spots and improving the uniformity and contrast of optical lens imaging.

[0047] In addition, during the dispensing process, the rough dispensing surface 211 helps to expel air bubbles, reduces the formation of air bubbles in the adhesive layer, and improves the dispensing quality.

[0048] In some alternative embodiments, the dispensing surface 211 is atomized to give it a roughness in the range of 0.2 to 0.3. For example, the roughness of the dispensing surface 211 is 0.25.

[0049] In some alternative embodiments, please refer to Figure 1 The tilt length L of the dispensing structure 21 is greater than or equal to 0.2 mm and less than or equal to 0.25 mm. When the tilt length L of the dispensing structure 21 is too short, the adhesive may not spread sufficiently, resulting in excessively thick or discontinuous adhesive in some areas, thus affecting the bonding effect. Limiting the tilt length L of the dispensing structure 21 to the range of 0.2 mm to 0.25 mm allows the adhesive to flow naturally under the action of surface tension and gravity, which is beneficial for forming a uniform adhesive layer and will not affect the imaging light.

[0050] In addition, the tilt length of the dispensing structure 21 is limited to the range of 0.2 mm to 0.25 mm. Without affecting the imaging light, non-imaging light has more opportunities to be scattered or refracted, which helps to reduce the impact of stray light on image quality and improve image clarity and contrast.

[0051] Figure 5 In the optical lens shown, the tilt length L of the dispensing structure 21 is equal to 0.3 mm. Stray light easily forms at the dispensing structure 21. Figure 6 for Figure 5 A stray light pattern on a medium optical lens.

[0052] In some optional embodiments, the optical lens further includes an adhesive layer. The inner wall surface of the lens barrel 10 includes a bearing surface segment 11 and a mating surface segment 12. The bearing surface segment 11 contacts the outer annular surface of the bearing lens 20. The mating surface segment 12 is closer to the image-side end face relative to the bearing surface segment 11. The mating surface segment 12 and the dispensing structure 21 form a dispensing groove 13, and the adhesive layer is located within the dispensing groove 13. The bearing surface segment 11 contacts the outer annular surface of the bearing lens 20 to position and support the bearing lens 20. The mating surface segment 12 and the dispensing structure 21 form the dispensing groove 13. During dispensing, the adhesive is contained within the dispensing groove 13 and cures to form an adhesive layer.

[0053] In some alternative embodiments, the distance from the mating surface segment 12 to the optical axis gradually increases in the direction away from the bearing surface segment 11. This arrangement allows the adhesive groove 13 to hold more adhesive, which helps to improve the stability of the bonding between the bearing lens 20 and the lens barrel 10.

[0054] In some alternative embodiments, the angle β between the mating surface segment 12 and the optical axis is greater than or equal to 5 degrees and less than or equal to 10 degrees. Furthermore, when the angle β between the mating surface segment 12 and the optical axis is greater than 10 degrees, the allowance for the fit between the lens barrel and the lens group is too small, leading to reduced reliability of the lens group. When the angle is less than 5 degrees, the adhesive dispensing width at that location becomes narrower, increasing the difficulty of the dispensing process.

[0055] In some optional embodiments, the inner wall surface of the lens barrel 10 includes a transition section 14, the two ends of which are connected to the supporting section 11 and the mating section 12, respectively. The transition section 14 extends obliquely from the supporting section 11 in a direction away from the optical axis. The transition section 14, the mating section 12, and the dispensing structure 21 form a dispensing groove 13. By providing the transition section 14, the space of the dispensing groove 13 is increased, so that the dispensing groove 13 can accommodate more adhesive, thereby improving the stability of the bonding between the supporting lens 20 and the lens barrel 10.

[0056] In some alternative embodiments, please refer to Figure 1 and Figure 3The optical structure has an anti-overflow adhesive section 22 on the image side surface. The anti-overflow adhesive section 22 extends obliquely from the dispensing structure 21 toward the object-averse side. The anti-overflow adhesive section 22 is located between the dispensing structure 21 and the optical effective part to prevent the adhesive at the dispensing structure 21 from overflowing into the optical effective part and to prevent the adhesive from affecting the imaging light.

[0057] The overall structure of an optical lens can be base-type, for example... Figure 3 It can also be a threaded fit, for example... Figure 1 The supporting lens 20 does not conflict with the aperture structure located inside the lens barrel 10. The lens barrel 10 has no special requirements as long as the manufacturing process and the coaxiality and roundness of its cooperation with other lenses are guaranteed.

[0058] 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.

[0059] 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.

[0060] 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.

[0061] 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. An optical lens, characterized in that, include: Lens tube (10); Multiple lenses are arranged sequentially within the lens barrel (10) along the extension direction of the optical axis. Among the multiple lenses, the lens closest to the image-side end face of the lens barrel (10) is a support lens (20). The support lens (20) includes an optical effective part and an optical structure part surrounding the optical effective part. The surface of the optical structure part facing the image side has a dispensing structure (21). The distance from the dispensing structure (21) to the optical axis gradually decreases along the direction from the object side to the image side. The dispensing structure (21) includes at least two dispensing surfaces (211) arranged radially along the support lens (20).

2. The optical lens according to claim 1, characterized in that, The distance from each of the dispensing surfaces (211) to the optical axis gradually decreases along the direction from the object side to the image side.

3. The optical lens according to claim 2, characterized in that, The dispensing structure (21) further includes at least one connecting surface (212) for connecting the dispensing surface (211), the connecting surface (212) being located between two adjacent dispensing surfaces (211), and the connecting surface (212) being parallel to the optical axis.

4. The optical lens according to claim 2, characterized in that, At least two of the dispensing surfaces (211) have the same angle with the optical axis.

5. The optical lens according to claim 1, characterized in that, The included angle between the adhesive dispensing surface (211) and the radial direction of the supporting lens (20) is greater than or equal to 15° and less than or equal to 30°.

6. The optical lens according to claim 1, characterized in that, The roughness of the dispensing surface (211) is greater than or equal to 0.2 μm and less than or equal to 0.3 μm.

7. The optical lens according to claim 1, characterized in that, The tilt length of the dispensing structure (21) is greater than or equal to 0.2 mm and less than or equal to 0.25 mm.

8. The optical lens according to any one of claims 1 to 7, characterized in that, The optical lens further includes an adhesive layer, and the inner wall surface of the lens barrel (10) includes: The bearing surface segment (11) is in contact with the outer ring surface of the bearing lens (20); The mating surface segment (12) is closer to the image side end face than the supporting surface segment (11). The mating surface segment (12) and the dispensing structure (21) form a dispensing groove (13), and the adhesive layer is located in the dispensing groove (13).

9. The optical lens according to claim 8, characterized in that, The distance from the mating surface segment (12) to the optical axis gradually increases in the direction away from the bearing surface segment (11).

10. The optical lens according to claim 9, characterized in that, The angle between the mating surface segment (12) and the optical axis is greater than or equal to 5 degrees and less than or equal to 10 degrees.

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