Lens, camera module and automobile

Abstract

The utility model relates to the technical field of camera shooting, and discloses a lens, a camera shooting module and an automobile. The lens comprises a lens barrel, a first lens, a second lens and a space ring, and the first lens, the space ring and the second lens are sequentially installed in the lens barrel. The inner wall surface of the lens barrel is provided with a first bearing surface, and the bearing surface and the optical axis of the lens form an included angle. The surface, facing the first lens, of the second lens is provided with a second bearing surface, and the second bearing surface is flush with the first bearing surface. The space ring comprises an upper supporting part and a lower supporting part which are connected at an included angle, the first lens is arranged on the upper supporting part, and the lower supporting part abuts against the first bearing surface and the second bearing surface. Therefore, the offset of the focal length of the lens can be reduced in a high-temperature environment, that is, the offset of the imaging surface of the lens is reduced, the temperature drift compensation of the lens is realized, and the imaging quality of the lens is improved.

Description

Technical Field

[0001] This utility model relates to the field of camera technology, specifically to a lens, a camera module, and an automobile. Background Technology

[0002] Lenses, with their light transmission capabilities, are widely used in various imaging fields such as automotive, security, and smart manufacturing. As a precision optical component, the imaging performance of a lens is highly sensitive to different temperatures. A lens consists of a lens barrel and lens elements housed within it. The lens elements are typically mounted in the lens barrel in a stacked or interlocking manner, and are axially fixed by spacers, locking rings, and the lens barrel. However, at high temperatures, the lens elements, spacers, and lens barrel all expand and contract axially, causing slight changes in their dimensions. Furthermore, because the materials of these elements differ, the amount of dimensional change due to temperature variations varies, leading to a shift in the lens's focal length—that is, a shift in the image plane's position. This prevents the image sensor from capturing a clear image, ultimately resulting in blurred images. The consequence is that the lens's sensitivity to high temperatures fails to meet requirements, affecting its optical performance. Therefore, it is necessary to provide a lens capable of temperature drift compensation under varying temperature conditions. Utility Model Content

[0003] This utility model discloses a lens, a camera module, and a car, with the aim of solving at least one of the technical problems existing in the prior art.

[0004] In a first aspect, this utility model provides a lens, comprising: a lens barrel, a first lens element, a second lens element, and a spacer. The first lens element, the spacer, and the second lens element are sequentially mounted inside the lens barrel along the optical axis of the lens. A first bearing surface is provided on the inner wall surface of the lens barrel, and the first bearing surface is set at an angle to the optical axis. A second bearing surface is provided on the surface of the second lens element facing the first lens element, and the second bearing surface and the first bearing surface are flush. The spacer includes an upper support portion and a lower support portion connected at an angle. The first lens element is disposed on the upper support portion, and the lower support portion abuts against the first bearing surface and the second bearing surface.

[0005] Furthermore, both the first bearing surface and the second bearing surface are perpendicular to the optical axis.

[0006] Furthermore, the lower support portion includes an annular body, a first branch ring, and a second branch ring. The upper support portion is disposed on the upper surface of the annular body, and the first branch ring and the second branch ring are disposed on the lower surface of the annular body, with a gap between them. The first branch ring abuts against the second bearing surface, and the second branch ring abuts against the first bearing surface.

[0007] Furthermore, the upper support includes a support arm and an extension ring connected at an angle. One end of the extension ring is connected to the upper surface of the annular body, and the other end is connected to the support arm. The first lens is disposed on the support arm.

[0008] Furthermore, the extension direction of the extension ring is perpendicular to the upper surface of the annular body, and an inner groove is provided at the connection between the extension ring and the support arm.

[0009] Furthermore, the surface of the support arm away from the extension ring is a plane, and the first lens is disposed on the plane.

[0010] Furthermore, the spacer also includes an upper branch ring, which is connected at an angle to the upper support portion and abuts against the inner wall surface of the lens barrel.

[0011] Furthermore, a sealing ring is provided within the gap.

[0012] Secondly, this utility model embodiment also provides a camera module, which includes a housing, a chip assembly, and a lens from any of the above embodiments. The chip assembly is installed inside the housing, and the lens is installed on the housing and located directly above the chip assembly.

[0013] Thirdly, this utility model embodiment also provides a car, which includes the camera module described in the above embodiment. Attached Figure Description

[0014] Figure 1 A cross-sectional view of the lens provided in Embodiment 1 of this utility model;

[0015] Figure 2 for Figure 1 Enlarged view of point A in the image;

[0016] Figure 3 This is a partial cross-sectional view of the lens provided in Embodiment 2 of this utility model;

[0017] Figure 4 A three-dimensional structural diagram of the spacer provided in Embodiment 2 of this utility model;

[0018] Figure 5This is a partial cross-sectional view of the lens provided in Embodiment 3 of this utility model;

[0019] Figure 6 This is a partial cross-sectional view of the lens provided in Embodiment 4 of this utility model. Detailed Implementation

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

[0021] In the description of this utility model, it should be noted that the terms "upper," "lower," "inner," "outer," "top / bottom," etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0022] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installed," "equipped with," "sleeved / connected," "connected," etc., should be interpreted broadly. For example, "connection" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be a connection within two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0023] The lens provided in the embodiments of this utility model will be further described in detail below with reference to the accompanying drawings.

[0024] Example 1

[0025] In this embodiment, as Figure 1 and Figure 2As shown, the lens provided in Embodiment 1 of this utility model includes a lens barrel 1, a first lens 2, a second lens 3, and a spacer 4. The first lens 2, the second lens 3, and the spacer 4 are installed inside the lens barrel 1. Both the lens barrel 1 and the spacer 4 are hollow cylindrical structures with openings at both ends, and both the first lens 2 and the second lens 3 are annular sheet structures. The lens barrel 1 includes an inner wall surface 11, which surrounds to form a receiving space. The first lens 2, the spacer 4, and the second lens 3 are sequentially arranged in the receiving space of the lens barrel 1 along the optical axis o of the lens, and the outer wall surfaces of the first lens 2 and the second lens 3 abut against the inner wall surface 11 of the lens barrel 1, that is, the lens barrel 1 and the spacer 4 complete the alignment and assembly of the first lens 2 and the second lens 3. The first lens 2 and the second lens 3 abut against the upper and lower sides of the spacer 4 along the optical axis o, that is, the spacer 4 is sandwiched between the first lens 2 and the second lens 3, which limits the inter-lens distance between the first lens 2 and the second lens 3. Of course, other optical components (such as other lenses, gaskets and locking rings) may also exist inside the lens barrel 1. These other optical components limit the surfaces of the first lens 2 and the second lens 3 that are away from the spacer 4, thereby achieving the assembly and positioning of the first lens 2 and the second lens 3.

[0026] Specifically, a first bearing surface 111 is provided on the inner wall surface 11 of the lens barrel 1, and the first bearing surface 111 is set at an angle to the optical axis o of the lens, that is, the first bearing surface 111 and the optical axis o have an angle, which facilitates the spacer 4 to abut against the first bearing surface 111. A second bearing surface 31 is provided on the surface of the second lens 3 facing the first lens 2, and the second bearing surface 31 and the first bearing surface 111 are flush, that is, the first bearing surface 111 and the second bearing surface 31 are on the same plane, ensuring that the second lens 3 and the lens barrel 1 have a mounting structure on the same plane, which facilitates the installation of the spacer 4 onto the second lens 3 and the lens barrel 1, and also ensures the installation accuracy of the first lens 2 and the second lens 3. The spacer 4 includes an upper support part 41 and a lower support part 42 connected at an angle, the first lens 2 is disposed on the upper support part 41, and the lower support part 42 abuts against the first bearing surface 111 and the second bearing surface 31. The spacer 4 is designed with an upper support 41 and a lower support 42 connected at an angle. This design allows the spacer 4 to easily deform under the pressure of the first lens 2 and the second lens 3. This reduces the distance between the first lens 2 and the second lens 3 when installed at room temperature, enabling the lens to better cope with focal length / image plane displacement caused by temperature changes in high-temperature environments, thus achieving temperature drift compensation. Simultaneously, since the lower support 42 of the spacer 4 is located on the first bearing surface 111 of the lens barrel 1, when the lens barrel 1 deforms in a high-temperature environment, it will cause the spacer 4 to shift, thereby adjusting the lens's focal length and achieving temperature drift compensation.

[0027] Furthermore, both the upper support portion 41 and the lower support portion 42 are hollow annular structures, with the upper support portion 41 protruding from the surface of the lower support portion 42. The upper support portion 41 is in a bent state, making the spacer ring 4 more prone to deformation, thus enabling the lens to better compensate for temperature drift. The upper support portion 41 and the lower support portion 42 are formed by an integral injection molding process, reducing the manufacturing difficulty of the spacer ring 4. Preferably, the spacer ring 4 is made of metal, and the upper support portion 41 and the lower support portion 42 are formed into an integral structure by machine tool cutting, ensuring the structural stability of the spacer ring 4. Of course, the spacer ring 4 can also be made of plastic, with the upper support portion 41 and the lower support portion 42 formed by an integral injection molding process, reducing the manufacturing difficulty of the spacer ring 4.

[0028] Furthermore, both the first bearing surface 111 and the second bearing surface 31 are perpendicular to the optical axis o of the lens, allowing for better installation of the spacer 4 on both surfaces, while also ensuring the installation accuracy of the first lens element 2 and the second lens element 3. Of course, the first bearing surface 111, perpendicular to the optical axis o, can also stably drive the spacer 4 to shift when the lens barrel 1 deforms, enabling the lens to achieve temperature drift compensation.

[0029] Example 2

[0030] Please refer to Figure 3 and Figure 4 , Figure 3 This is a partial cross-sectional view of the lens provided in Embodiment 2 of this utility model, wherein... Figure 3The connection relationship between the lens barrel 1, the second lens 3, and the spacer 4 is shown in the figure. The main improvement of Embodiment 2 compared to Embodiment 1 is in the spacer 4. Specifically, the spacer 4 includes an upper support 41, an annular body 421, a first branch ring 422, and a second branch ring 423. The annular body 421 is an annular hollow sheet structure. The upper support 41 is disposed on the upper surface of the annular body 421, and the first branch ring 422 and the second branch ring 423 are disposed on the lower surface of the annular body 421. The first branch ring 422 and the second branch ring 423 have a gap 424, meaning that the cross-section of the first branch ring 422 and the second branch ring 423 along the optical axis o is in the shape of an "eight". By providing a gap 424 between the first branch ring 422 and the second branch ring 423, the spacer 4 can deform under axial compressive force, thereby achieving axial force relief. In this design, the upper surface of the annular body 421 refers to the surface of the annular body 421 facing the first lens 2, and the lower surface of the annular body 421 refers to the surface of the annular body 421 facing the second lens 3. The upper and lower surfaces of the annular body 421 are distributed vertically along the optical axis o of the lens. A gap 424 is maintained between the first branch ring 422 and the second branch ring 423 of the spacer 4, and an upper support portion 41 is provided on the upper part of the first branch ring 422 and the second branch ring 423. This design makes the spacer 4 easy to deform when subjected to the squeezing force of the first lens 2 and the second lens 3, thereby reducing the distance between the first lens 2 and the second lens 3 when installed in the initial room temperature environment. This allows the lens to better cope with the image plane changes caused by temperature changes in the high temperature environment, enabling the lens to achieve temperature drift compensation. Preferably, the spacer 4 is made of metal, and the upper support portion 41, the annular body 421, the first branch ring 422 and the second branch ring 423 are formed into an integral structure by machine tool cutting to ensure the structural stability of the spacer 4.

[0031] In this design, the first lens 2 is mounted on the upper support 41, the first branch ring 422 abuts against the second bearing surface 31, and the second branch ring 423 abuts against the first bearing surface 111. That is, the first lens 2 is mounted on the second lens 3 and the lens barrel 1 via a spacer ring 4. By designing the spacer ring 4 as a multi-part structure composed of the upper support 41, the annular body 421, the first branch ring 422, and the second branch ring 423, and by mounting the first lens 2 on the upper support 41, the first branch ring 422 on the second lens 3, and the second branch ring 423 on the lens barrel 1, the lens can reduce its focal length shift in high-temperature environments, which means reducing the shift of the lens's imaging plane. This ensures clear image formation, enables temperature drift compensation, and ultimately improves the lens's image quality. It should be noted that lens temperature drift compensation, also known as lens temperature shift compensation, refers to the phenomenon that the lens's performance parameters (focal length or imaging plane) shift due to temperature changes. In order to ensure the image quality of the lens, targeted compensation is performed to ensure that the distance between the lens's focal length / imaging plane and the image sensor is controlled within a certain range, thereby improving the image quality of the lens.

[0032] To facilitate understanding of how this lens achieves temperature drift compensation, the following explanation is based on the principle of temperature drift compensation. The spacer 4 is designed with the aforementioned structure, making it susceptible to deformation under compressive force during the assembly of the first lens element 2 and the second lens element 3. This reduces the distance between the first lens element 2 and the second lens element 3, causing a positive initial change in the overall focal length (i.e., the imaging plane) of the lens under normal temperature assembly. However, this initial change is within an allowable range and does not affect the lens's imaging performance at normal temperature; that is, the compressive deformation of the spacer 4 during assembly is not severe. According to the formula: Actual lens temperature drift = High temperature drift - Normal temperature drift, since the materials of the lens barrel 1, the first lens element 2, the second lens element 3, and the spacer 4 are fixed (i.e., their high temperature drift is fixed), the design of the spacer 4 increases the normal temperature drift, ultimately reducing the actual temperature drift of the lens and thus improving the lens's actual temperature drift, thereby achieving temperature drift compensation. Secondly, in high-temperature environments, since the second branch ring 423 of the spacer 4 is located on the first bearing surface 111 of the lens barrel 1, and the expansion of the first lens 2, the second lens 3, and the spacer 4 in the optical axis o direction at high temperatures is less than the expansion of the lens barrel 1, the first lens 2 can be displaced upwards in the optical axis o direction through the spacer 4 and the lens barrel 1. This increases the distance between the first lens 2 and the second lens 3, effectively adjusting the distance between the first lens 2 and the second lens 3 to adjust the focal length of the lens, thus addressing the focal length shift under high temperatures and achieving temperature drift compensation. The lens designed in this invention, through the deformable design of the spacer 4 and the connection relationship between the first lens 2, the second lens 3, the spacer 4, and the lens barrel 1, achieves temperature drift compensation from changes in the lens focal length at room temperature and from the displacement of the first lens 2 in high-temperature environments. The combination of these two methods allows the lens to achieve better temperature drift compensation in high-temperature environments, improving the lens's optical performance. Similarly, the principle of temperature drift compensation in low-temperature environments is similar and will not be elaborated here.

[0033] Preferably, the upper support portion 41, the first branch ring 422, and the second branch ring 423 are all integral annular hollow structures. Of course, the upper support portion 41, the first branch ring 422, and the second branch ring 423 can also be annular structures formed by multiple segmented sheet-like structures spaced apart and enclosed.

[0034] Furthermore, the upper support portion 41 includes a support arm 411 and an extension ring 412 connected at an angle. One end of the extension ring 412 is connected to the upper surface of the annular body 421, and the other end is connected to the support arm 411. The first lens 2 is disposed on the support arm 411. Preferably, the support arm 411 has an annular hollow structure. By configuring the support arm 411 and the extension ring 412 for supporting the first lens 2 as a bent structure, the support arm 411 and the extension ring 412 are easily deformed when the first lens 2 presses against the support arm 411, that is, the upper support portion 41 is easily deformed, thereby making it easier to reduce the inter-lens distance between the first lens 2 and the second lens 3 when they are installed.

[0035] Furthermore, the extension ring 412 extends perpendicularly to the upper surface of the annular body 421, and an inner groove 413 is provided at the connection between the extension ring 412 and the support arm 411. By vertically positioning the extension ring 412 on the upper surface of the annular body 421, the support arm 411, which is connected to the extension ring 412 at an angle, can be easily bent relative to the annular body 421. Moreover, by providing the inner groove 413 at the connection between the extension ring 412 and the support arm 411, it is easier for the support arm 411 to bend relative to the extension ring 412, thereby making it easier to reduce the inter-lens distance between the first lens 2 and the second lens 3 during installation, ultimately meeting the lens temperature drift compensation requirements.

[0036] Furthermore, the surface of the support arm 411 away from the extension ring 412 is a plane, and the first lens 2 is set on the plane, thereby ensuring that the first lens 2 and the support arm 411 make full contact through the plane, preventing the first lens 2 from tilting relative to the support arm 411, and improving the installation accuracy of the first lens 2 and the spacer 4.

[0037] Example 3

[0038] Please refer to Figure 5 , Figure 5 This is a partial cross-sectional view of the lens provided in Embodiment 3 of this utility model, wherein... Figure 5 The connection relationship between the lens barrel 1, the second lens 3, and the spacer 4 is shown in the figure. The main difference between Embodiment 3 and Embodiment 2 is the structure of the spacer 4. Specifically, the spacer 4 further includes an upper branch ring 43, which is connected at an angle to the upper support portion 41. The upper branch ring 43 is located on the outer side of the upper support portion 41 and abuts against the inner wall surface 11 of the lens barrel 1. The upper branch ring 43 ensures that the center of the spacer 4 is aligned with the center of the lens barrel 1, providing a certain limit for the installation of the spacer 4 and ensuring the installation accuracy of the spacer 4.

[0039] Example 4

[0040] Please refer to Figure 6 , Figure 6 This is a partial cross-sectional view of the lens provided in Embodiment 4 of this utility model, wherein... Figure 6The connection relationship between the lens barrel 1, the second lens element 3, and the spacer 4 is shown. The main difference between Embodiment 4 and Embodiment 2 is the addition of a sealing ring 5 within the spacer 4. Specifically, a sealing ring 5 is provided within the gap 424 between the first branch ring 422 and the second branch ring 423. This prevents dust or moisture from entering the optical element at the rear end of the second lens element 3 through the gap 424, thus affecting the lens's image quality. Simultaneously, considering that the expansion of the sealing ring 5 at high temperatures is much greater than that of the second lens element 3, the sealing ring 5, upon heating and expanding, can press the second lens element 3 downwards, ensuring tight contact between the second lens element 3 and the optical element at its rear end along the optical axis o, which is beneficial for the lens's axial stability. Furthermore, the sealing ring 5 can eliminate any axial gap that may exist between the second lens element 3 and the optical element at its rear end, further increasing the distance between the first lens element 2 and the second lens element 3, reducing the focal length shift of the lens at high temperatures, and enabling temperature drift compensation.

[0041] Secondly, this utility model embodiment also provides a camera module, which includes a housing, a chip assembly, and a lens as described in any of the above embodiments. The chip assembly is installed inside the housing, and the lens is installed on the housing and located directly above the chip assembly. Light passing through the lens can directly illuminate the chip assembly, and the chip assembly receives the light to form an image. The chip assembly includes a photosensitive chip for receiving light.

[0042] Thirdly, this utility model embodiment also provides a car, which includes the camera module described in the above embodiment.

[0043] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model based on the technical solution and its improved concept should be covered within the protection scope of the present utility model.

Claims

1. A lens, characterized in that, include: The lens barrel, the first lens element, the second lens element, and the spacer are sequentially installed inside the lens barrel along the optical axis of the lens. A first bearing surface is provided on the inner wall surface of the lens barrel, and the first bearing surface is set at an angle to the optical axis; The second lens has a second bearing surface on its surface facing the first lens, and the second bearing surface and the first bearing surface are flush. The spacer includes an upper support portion and a lower support portion connected at an angle, the first lens is disposed on the upper support portion, and the lower support portion abuts against the first bearing surface and the second bearing surface.

2. The lens according to claim 1, characterized in that, Both the first bearing surface and the second bearing surface are perpendicular to the optical axis.

3. The lens according to claim 1, characterized in that, The lower support portion includes an annular body, a first branch ring, and a second branch ring. The upper support portion is disposed on the upper surface of the annular body, and the first branch ring and the second branch ring are disposed on the lower surface of the annular body, with a gap between them. The first branch ring abuts against the second bearing surface, and the second branch ring abuts against the first bearing surface.

4. The lens according to claim 3, characterized in that, The upper support includes a support arm and an extension ring connected at an angle. One end of the extension ring is connected to the upper surface of the annular body, and the other end is connected to the support arm. The first lens is disposed on the support arm.

5. The lens according to claim 4, characterized in that, The extension ring extends in a direction perpendicular to the upper surface of the annular body, and an inner groove is provided at the connection between the extension ring and the support arm.

6. The lens according to claim 5, characterized in that, The surface of the support arm away from the extension ring is a plane, and the first lens is disposed on the plane.

7. The lens according to claim 1, characterized in that, The spacer also includes an upper branch ring, which is connected at an angle to the upper support portion and abuts against the inner wall surface of the lens barrel.

8. The lens according to claim 3, characterized in that, A sealing ring is provided within the gap.

9. A camera module, characterized in that, include: The housing, the chip assembly, and the lens as claimed in any one of claims 1 to 8, wherein the chip assembly is mounted within the housing, and the lens is mounted on the housing and located directly above the chip assembly.

10. A car, characterized in that, Includes the camera module as described in claim 9.

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