Lens and vehicle

Abstract

The invention provides a lens. The lens comprises a first barrel and a second barrel. The first cylinder piece comprises a first cylinder body and a first connecting part arranged at one end of the first cylinder body, the first cylinder body forms a first containing cavity in a surrounding mode, and the first containing cavity is used for fixing a lens. The second barrel piece comprises a second barrel body and a second connecting part arranged at one end, close to the first barrel body, of the second barrel body, and the second connecting part is used for being connected with the first connecting part; and one end, far away from the second connecting part, of the second cylinder body is used for being bonded with a circuit board. The absolute value of the difference value between the thermal expansion coefficient of the second cylinder part and the thermal expansion coefficient of the circuit board is smaller than the absolute value of the difference value between the thermal expansion coefficient of the first cylinder part and the thermal expansion coefficient of the circuit board. The invention further provides a vehicle comprising the lens.

Description

Technical Field

[0001] This application relates to the field of optical technology, and more particularly to a lens and a vehicle including the lens. Background Technology

[0002] With the development of science and technology, lenses are being used more and more widely in vehicles, and people's requirements for lens pixels and performance are also increasing. To improve lens quality, active alignment (AA) technology is generally used to focus the lens. After focusing using the AA process, AA adhesive is used to bond the lens barrel to the photosensitive chip on the printed circuit board (PCB).

[0003] However, after focusing, the lens needs to undergo long-term environmental testing at high temperatures. Under prolonged high temperatures, due to the difference in the coefficient of thermal expansion (CTE) between the lens barrel and the PCB board, the deformation of the lens barrel and the PCB board differs, resulting in changes in the overall size of the lens module. This affects the focusing distance of the lens module and consequently, the overall optical performance of the lens module. Summary of the Invention

[0004] The first aspect of this application provides a lens, comprising:

[0005] A first cylindrical component includes a first cylindrical body and a first connecting portion disposed at one end of the first cylindrical body. The first cylindrical body forms a first receiving cavity, the first receiving cavity being used to fix a lens.

[0006] The second cylindrical component includes a second cylindrical body and a second connecting portion disposed at one end of the second cylindrical body near the first cylindrical body, the second connecting portion being used to connect with the first connecting portion; the end of the second cylindrical body away from the second connecting portion is used to be bonded to a circuit board.

[0007] Wherein, the absolute value of the difference between the thermal expansion coefficient of the second cylindrical component and the thermal expansion coefficient of the circuit board is less than the absolute value of the difference between the thermal expansion coefficient of the first cylindrical component and the thermal expansion coefficient of the circuit board.

[0008] The lens provided in this application embodiment sets the absolute value of the difference between the thermal expansion coefficient of the second cylindrical component and the thermal expansion coefficient of the circuit board to be smaller than the difference between the thermal expansion coefficient of the first cylindrical component and the thermal expansion coefficient of the circuit board. This makes the thermal expansion coefficient of the second cylindrical component closer to that of the circuit board than that of the first cylindrical component, and makes the deformation degree of the second cylindrical component at the same temperature closer to that of the circuit board than that of the first cylindrical component. Furthermore, the second cylindrical component and the first cylindrical component are connected by a first connecting part and a second connecting part. When the temperature changes, the influence of the deformation of the first cylindrical component on the circuit board can be reduced, thereby reducing the size change of the lens when the temperature changes, and thus playing a role in temperature compensation. When the lens is fixed in the first accommodating cavity, it is beneficial to reduce the change of the lens focusing distance when the temperature changes, and to improve the stability of the overall optical performance of the lens.

[0009] In one embodiment, the first connecting portion is screwed to the second connecting portion.

[0010] In one embodiment, the coefficient of thermal expansion CTE1 of the first cylindrical member satisfies: 60≤CTE1≤90.

[0011] In one embodiment, the material of the first cylindrical member is any one of polycarbonate, polyphenylene sulfide, and polyamide 9T.

[0012] In one embodiment, the coefficient of thermal expansion CTE2 of the second cylinder satisfies: 10≤CTE2≤40.

[0013] In one embodiment, the material of the second cylindrical member is any one of plastic-glass fiber composite material, metal, and ceramic.

[0014] In one embodiment, the material of the second cylinder is a mixture of polycarbonate and 40% glass fiber or a mixture of polyphenylene sulfide and 40% glass fiber.

[0015] In one embodiment, the lens further includes an optical module comprising at least one lens fixed to a first receiving cavity and used to receive image light.

[0016] In one embodiment, the lens further includes a circuit board and a filter element;

[0017] The filter element is disposed in the second receiving cavity formed around the second cylinder and is used to receive the image light incident from the lens. The circuit board is bonded to the end of the second cylinder away from the second connecting part. The circuit board also includes a photosensitive chip, which is used to receive the image light incident from the filter element and form an image.

[0018] A second aspect of this application provides a vehicle, comprising:

[0019] The subject; and

[0020] The lens described in any of the above embodiments is mounted on the body.

[0021] The vehicle provided in this application embodiment, by setting the lens described in any of the above embodiments, is beneficial to reducing the variation of the lens's focusing distance, improving the stability of the lens's overall optical performance, and thus enhancing the user experience of the vehicle using the lens. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of the lens structure according to an embodiment of this application.

[0023] Figure 2 This is an exploded view of a lens according to an embodiment of this application.

[0024] Figure 3 This is a schematic diagram of the lens structure according to another embodiment of this application.

[0025] Figure 4 This is an exploded view of a lens according to an embodiment of this application.

[0026] Figure 5 for Figure 1 Cross-sectional view along line V-V.

[0027] Figure 6 This is a schematic diagram of a vehicle according to an embodiment of this application.

[0028] Explanation of key component symbols:

[0029] Lens 100

[0030] First cylinder 1

[0031] First cylinder 11

[0032] First receiving cavity 11a

[0033] First connecting part 13

[0034] Internal thread 13a

[0035] Second cylinder 3

[0036] Second cylinder 31

[0037] Second receiving cavity 31a

[0038] Second connecting part 33

[0039] External thread 33a

[0040] Optical Module 4

[0041] Lens 41

[0042] Circuit board 5

[0043] Image sensor 51

[0044] Filter element 6

[0045] Vehicle 700

[0046] Ontology 701

[0047] The following detailed description, in conjunction with the accompanying drawings, will further illustrate the present invention. Detailed Implementation

[0048] The technical solutions in the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments.

[0049] Unless otherwise defined, 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. The terminology used in this application's specification is for the purpose of describing particular embodiments only and is not intended to limit the application. Concepts such as "first," "second," etc., mentioned in this application are used only to distinguish different devices, modules, or units and are not intended to limit the order or interdependence of the functions performed by these devices, modules, or units.

[0050] To further illustrate the technical means and effects adopted by this application in achieving its intended purpose, the following detailed description of this application is provided in conjunction with the accompanying drawings and preferred embodiments.

[0051] Please refer to the following: Figure 1 and Figure 2 The lens 100 in this embodiment includes a first cylindrical member 1 and a second cylindrical member 3.

[0052] The first cylindrical component 1 includes a first cylindrical body 11 and a first connecting portion 13 disposed at one end of the first cylindrical body 11. The first cylindrical body 11 forms a first receiving cavity 11a, which is used to fix the lens 41. The first cylindrical body 11 and the first connecting portion 13 are integrally formed. The first connecting portion 13 is provided with an internal thread 13a and is used to screw onto the second cylindrical component 3. In this embodiment, the first connecting portion 13 completely surrounds and connects to the end of the first cylindrical body 11 facing the second cylindrical component 3. When the first connecting portion 13 is screwed onto the second cylindrical component 3, the first connecting portion 13 completely wraps around the end of the second cylindrical component 3 near the first connecting portion 13, thereby enhancing the stability of the connection between the first cylindrical component 1 and the second cylindrical component 3 and further counteracting the separation or deformation caused by temperature changes. Please refer to [further details omitted]. Figure 3 and Figure 4 In other embodiments, the first cylindrical member 1 includes two first connecting portions 13 disposed at one end of the first cylindrical body 11. The first connecting portions 13 do not completely surround the end of the first cylindrical body 11 facing the second cylindrical member 3. The two first connecting portions 13 are equally spaced at one end of the first cylindrical body 11. When the first connecting portion 13 is screwed to the second cylindrical member 3, the first connecting portion 13 does not completely wrap around the end of the second cylindrical member 3 near the first connecting portion 13. Alternatively, the number of first connecting portions 13 can also be multiple, with multiple first connecting portions 13 disposed at one end of the first cylindrical body 11. This application does not impose any limitations.

[0053] Please refer to the following: Figure 2 and Figure 5 The first cylindrical component 1 is made of any one of polycarbonate (PC), polyphenylene sulfide (PPS), and polyamide 9T. Compared with conventional cylindrical components, the first cylindrical component 1, made of the above materials, can maintain effective strength and toughness at higher temperatures, and has higher thermal stability, lower mold corrosion, and higher lubricity. By setting the material of the first cylindrical component 1 to any one of PC, PPS, and polyamide 9T, it is beneficial to reduce the overall cost of the lens 100 while maintaining the high temperature resistance and high performance of the first cylindrical component 1. In other embodiments, the material of the first cylindrical component 1 may also be polyhexamethylene adipamide, polyhexamethylene adipamide, or polybutylene adipamide; this application is not limited to these materials. The coefficient of thermal expansion CTE1 of the first cylindrical component 1 is in the range of 60 ≤ CTE1 ≤ 90. For example, the coefficient of thermal expansion CTE1 of the first cylindrical component 1 can be any value within the range of 60-65, 65-70, 70-75, 75-80, 80-85, or 85-90. The first cylindrical component 1 has a relatively large coefficient of thermal expansion, therefore, when the temperature changes, the deformation of the first cylindrical component 1 is relatively large.

[0054] The second cylindrical component 3 includes a second cylindrical body 31 and a second connecting portion 33 disposed at one end of the second cylindrical body 31 near the first cylindrical body 11. The second connecting portion 33 is used to connect with the first connecting portion 13. The end of the second cylindrical body 31 away from the second connecting portion 33 is used to bond to a circuit board 5. In this embodiment, the second connecting portion 33 has an external thread 33a, and the first connecting portion 13 is used to screw into the second connecting portion 33. In other embodiments, the first connecting portion 13 and the second connecting portion 33 can be connected by bonding, which is not limited in this application. The second cylindrical body 31 forms a second receiving cavity 31a. The material of the second cylindrical component 3 is any one of a plastic-glass fiber composite material, metal, and ceramic. For example, the material of the second cylindrical component 3 can be a composite material of PC and 40 wt% glass fiber or a composite material of PPS and 40 wt% glass fiber, which is not limited in this application.

[0055] The lens 100 also includes an optical module 4, a circuit board 5, and a filter element 6. The optical module 4 includes at least one lens 41, which is fixed to the first receiving cavity 11a and used to receive image light (not shown). The lens 41 can be a convex lens, a concave lens, a polarizing prism, a freeform mirror, or other optical elements with light-receiving functions; this application is not limited to these. The filter element 6 is disposed in the second receiving cavity 31a formed around the second cylinder 31 and used to receive image light incident from the lens 41. The circuit board 5 is bonded to the end of the second cylinder 31 away from the second connecting portion 33, such as by using UV-curable adhesive. The circuit board 5 also includes a photosensitive chip 51, which is used to receive image light incident from the filter element 6 and form an image. Furthermore, the circuit board 5 also includes metal traces (not shown) and electronic components (not shown). Since there are various components on the circuit board 5, and each component has a different coefficient of thermal expansion, but since all components are located on one side of the copper-clad laminate (not shown in the figure), the coefficient of thermal expansion CTE3 of the circuit board 5 is affected by the copper-clad laminate on the circuit board 5. The range of the coefficient of thermal expansion CTE3 of the circuit board 5 is generally 10-25. The coefficient of thermal expansion CTE3 of the circuit board 5 is relatively small, so the deformation of the circuit board 5 is relatively small when the temperature changes.

[0056] The coefficient of thermal expansion (CTE2) of the second cylindrical component 3 is in the range of 10 ≤ CTE2 ≤ 40. The value of the coefficient of thermal expansion (CTE2) of the second cylindrical component 3 can be any value within the range of 10-15, 15-20, 20-25, 25-30, 30-35, or 35-40. Because the coefficient of thermal expansion of the second cylindrical component 3 is relatively small, the deformation of the second cylindrical component 3 is also relatively small when the temperature changes. The absolute value of the difference between the thermal expansion coefficient CTE2 of the second cylinder 3 and the thermal expansion coefficient CTE3 of the circuit board 5 is less than the absolute value of the difference between the thermal expansion coefficient CTE1 of the first cylinder 1 and the thermal expansion coefficient CTE3 of the circuit board 5. That is, the thermal expansion coefficient CTE2 of the second cylinder 3 is closer to the thermal expansion coefficient CTE3 of the circuit board 5 than the thermal expansion coefficient CTE1 of the first cylinder 1. For example, when the thermal expansion coefficient CTE1 of the first cylinder 1 is 60 and the thermal expansion coefficient of the circuit board 5 is 10 or 25, the thermal expansion coefficient CTE2 of the second cylinder 3 is closer to the thermal expansion coefficient CTE3 of the circuit board 5 than the thermal expansion coefficient CTE1 of the first cylinder 1.

[0057] By setting the absolute value of the difference between the thermal expansion coefficient CTE2 of the second cylindrical component 3 and the thermal expansion coefficient CTE3 of the circuit board 5 to be less than the difference between the thermal expansion coefficient CTE1 of the first cylindrical component 1 and the thermal expansion coefficient CTE3 of the circuit board 5, the deformation degree of the second cylindrical component 3 at the same temperature is closer to the deformation degree of the circuit board 5 than that of the first cylindrical component 1. When the temperature changes, the second cylindrical component 3, as a transition component between the first cylindrical component 1 and the circuit board 5, can reduce the impact of the deformation of the first cylindrical component 1 on the circuit board 5 during temperature changes, thereby reducing the dimensional change of the lens 100 during temperature changes and thus playing a role in temperature compensation. In addition, the first connecting part 13 is screwed to the second connecting part 33 of the second cylindrical component 3. When the first cylindrical component 1 undergoes large deformation with temperature changes, some of the deformation can be offset by the screwed relationship between the first cylindrical component 1 and the second cylindrical component 3, so excessive deformation will not affect the connection relationship between the first cylindrical component 1 and the second cylindrical component 3. Therefore, when the temperature changes, it is beneficial to reduce the change in the focusing distance of lens 100, which is beneficial to improve the stability of the overall optical performance of lens 100.

[0058] The lens 100 provided in this application embodiment sets the absolute value of the difference between the thermal expansion coefficient CTE2 of the second cylindrical member 3 and the thermal expansion coefficient CTE3 of the circuit board 5 to be less than the difference between the thermal expansion coefficient CTE1 of the first cylindrical member 1 and the thermal expansion coefficient CTE3 of the circuit board 5. This makes the thermal expansion coefficient CTE2 of the second cylindrical member 3 closer to the thermal expansion coefficient CTE3 of the circuit board 5 than the thermal expansion coefficient CTE1 of the first cylindrical member 1. This makes the deformation degree of the second cylindrical member 3 at the same temperature closer to the deformation degree of the circuit board 5 than the deformation degree of the first cylindrical member 1. Furthermore, the second cylindrical member 3 and the first cylindrical member 1 are connected by the first connecting part 13 and the second connecting part 33. When the temperature changes, the deformation of the first cylindrical member 1 during temperature changes can be reduced, thereby reducing the dimensional change of the lens 100 during temperature changes and thus playing a temperature compensation role. When the lens 41 is fixed in the first receiving cavity 11a, it is beneficial to reduce the change in the focusing distance of the lens 100 during temperature changes and to improve the stability of the overall optical performance of the lens 100.

[0059] Please refer to the following: Figure 2 and Figure 6 The vehicle 700 in this embodiment includes a body 701 and a lens 100 as described in any of the above embodiments, with the lens 100 mounted on the body 701. The vehicle 700 can be any of an electric vehicle, a gasoline vehicle, or a diesel vehicle; this application does not impose any limitation. The lens 100 can be any of a front-view lens, a surround-view lens, a rear-view lens, a side-view lens, or a built-in lens mounted on the vehicle 700. For example, when the lens 100 is a surround-view lens, it is mainly located around the vehicle body, typically numbering 4-8, specifically divided into a forward-facing fisheye lens, a left-side fisheye lens, a right-side fisheye lens, and a rear-facing fisheye lens. When the lens 100 is a surround-view lens, it can be used to realize the vehicle's panoramic surround-view function and the visual perception and target detection of the fused parking function.

[0060] The vehicle 700 provided in this application embodiment, by setting the lens 100 of any of the above embodiments, has a thermal expansion coefficient CTE2 of the second cylindrical member 3 that is closer to the thermal expansion coefficient CTE3 of the circuit board 5 than the thermal expansion coefficient CTE1 of the first cylindrical member 1. This makes the deformation degree of the second cylindrical member 3 at the same temperature closer to the deformation degree of the circuit board 5 than the deformation degree of the first cylindrical member 1. Furthermore, the second cylindrical member 3 and the first cylindrical member 1 are connected by the first connecting part 13 and the second connecting part 33. When the temperature changes, the deformation of the first cylindrical member 1 during temperature changes can be reduced, thereby reducing the size change of the lens 100 during temperature changes and thus playing a role in temperature compensation. When the lens 41 is fixed in the first receiving cavity 11a, it is beneficial to reduce the change in the focusing distance of the lens 100 during temperature changes and to improve the stability of the overall optical performance of the lens 100.

[0061] The above embodiments are only used to illustrate the technical solutions of this application and are not intended to limit it. Although this application has been described in detail with reference to the above preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions to the technical solutions of this application should not depart from the spirit and scope of the technical solutions of this application.

Claims

1. A lens, characterized in that, include: The first cylindrical component includes a first cylindrical body and a first connecting portion disposed at one end of the first cylindrical body. The first cylindrical body forms a first receiving cavity, which is used to fix the lens. as well as The second cylindrical component includes a second cylindrical body and a second connecting portion disposed at one end of the second cylindrical body near the first cylindrical body, the second connecting portion being used to connect with the first connecting portion; the end of the second cylindrical body away from the second connecting portion is used to be bonded to a circuit board. Wherein, the absolute value of the difference between the thermal expansion coefficient of the second cylindrical component and the thermal expansion coefficient of the circuit board is less than the absolute value of the difference between the thermal expansion coefficient of the first cylindrical component and the thermal expansion coefficient of the circuit board.

2. The lens according to claim 1, characterized in that, The first connecting part is screwed to the second connecting part.

3. The lens according to claim 1, characterized in that, The thermal expansion coefficient CTE1 of the first cylindrical component satisfies: 60≤CTE1≤90.

4. The lens according to claim 3, characterized in that, The material of the first cylindrical component is any one of polycarbonate, polyphenylene sulfide, and polyamide 9T.

5. The lens according to claim 1, characterized in that, The coefficient of thermal expansion CTE2 of the second cylinder satisfies: 10≤CTE2≤40.

6. The lens according to claim 5, characterized in that, The material of the second cylindrical component is any one of plastic-glass fiber composite material, metal, and ceramic.

7. The lens according to claim 6, characterized in that, The material of the second cylinder is a mixture of polycarbonate and 40 wt% glass fiber or a mixture of polyphenylene sulfide and 40 wt% glass fiber.

8. The lens according to claim 1, characterized in that, The lens also includes an optical module, which includes at least one lens fixed to the first receiving cavity and used to receive image light.

9. The lens according to claim 8, characterized in that, The lens also includes a circuit board and a filter element; The filter element is disposed in the second receiving cavity formed around the second cylinder and is used to receive the image light incident from the lens. The circuit board is bonded to the end of the second cylinder away from the second connecting part. The circuit board also includes a photosensitive chip, which is used to receive the image light incident from the filter element and form an image.

10. A vehicle, characterized in that, include: ontology; as well as The lens as described in any one of claims 1-9, wherein the lens is disposed on the body.

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