Camera lens for vehicles and camera module including the camera lens

Abstract

An embodiment of the camera module disclosed in this invention includes: a plurality of lenses stacked from the object side toward the image side; and spacers arranged on the outer circumference of each adjacent lens. Among the plurality of lenses, at least a first lens includes: a first region having an effective diameter and having a first surface on the object side and a second surface on the image side; and a flange unit arranged on the circumference of the first region, having a third surface extending outward from the first surface and a fourth surface extending outward from the second surface, wherein the flange unit includes: a plurality of first grooves recessed from the third surface toward the fourth surface; and a plurality of second grooves recessed from the fourth surface toward the third surface. Each of the third and fourth surfaces of the flange unit can face the spacer.

Description

Technical Field

[0001] Embodiments of the present invention relate to a camera lens and a camera module for a vehicle. Background Technology

[0002] ADAS (Advanced Driver Assistance Systems) is a type of advanced driver assistance system designed to assist drivers. It consists of sensing the situation ahead, determining the situation based on the sensing results, and controlling vehicle behavior based on the situation determination. For example, ADAS sensor devices detect vehicles ahead and identify lanes. Then, when the target lane, target speed, and target ahead are determined, the vehicle's Electrical Stability Control (ESC), Engine Management System (EMS), and Motor-Driven Power Steering (MDPS) are controlled. Typically, ADAS can be implemented as automatic parking systems, low-speed city driving assistance systems, blind spot warning systems, etc. Sensor devices used to sense the situation ahead in ADAS include GPS sensors, laser scanners, front radar, and lidar. The most representative is a front-facing camera used to capture images of the area in front of the vehicle.

[0003] In recent years, research into sensing systems for detecting the area around vehicles has accelerated to improve driver safety and convenience. Vehicle detection systems are used for various purposes (such as detecting objects around the vehicle to prevent collisions with objects unnoticed by the driver, and automatically parking by detecting empty spaces) and provide essential data for automated vehicle control. Such detection systems typically employ either radar signals or cameras. Camera modules for vehicles are used through front and rear monitoring cameras and dashboard cameras built into the car to capture photos or videos of the subject. Because vehicle camera modules are exposed to the outside environment, image quality can deteriorate due to humidity and temperature. In particular, a problem with camera modules is that their optical characteristics change depending on ambient temperature and lens materials. Summary of the Invention

[0004] Technical issues

[0005] Embodiments of the present invention can provide a lens for a vehicle, wherein a flange portion outside the effective diameter through which light passes has a plurality of grooves. Embodiments of the present invention can provide a lens for a vehicle, wherein grooves are provided on the upper and lower surfaces of the flange portion outside the effective diameter. Embodiments of the present invention can provide a camera module, wherein the flange portions of one or more lenses have grooves. Embodiments of the present invention can provide a camera module, wherein at least one flange portion of a plurality of lenses has grooves on both sides. Embodiments of the present invention can provide a camera module, wherein grooves are formed on at least one flange portion of a plurality of lenses, and spacers are opposite to these grooves. Embodiments of the present invention can provide a camera module including lenses and / or spacers having at least one groove or buffer structure on the upper and lower surfaces. Embodiments of the present invention can provide a camera module having a flange portion having grooves on the upper and lower portions to mitigate lens contraction and expansion.

[0006] Technical solution

[0007] A lens for a vehicle according to an embodiment of the present invention includes: a first region having an effective diameter, the first region having an object-side first surface and an image-side second surface; and a flange portion disposed around the first region and having a third surface extending outward from the first surface and a fourth surface extending outward from the second surface, wherein the flange portion includes: a plurality of first grooves recessed from the third surface of the flange portion toward the fourth surface; and a plurality of second grooves recessed from the fourth surface toward the third surface.

[0008] According to an embodiment of the present invention, each of the plurality of first grooves may have an annular shape with a different radius in the third surface and may be arranged in a concentric circle shape. Each of the plurality of second grooves has an annular shape with a different radius in the fourth surface and may be arranged in a concentric circle shape, and the low point of each of the plurality of first grooves and the high point of each of the plurality of second grooves may be arranged to be offset from each other. The distance between the plurality of first grooves may be less than the maximum width of each first groove, and the distance between the plurality of second grooves may be less than the maximum width of the second grooves. The minimum distance between the plurality of first grooves and the upper edge of the first region may be less than the minimum distance between the plurality of second grooves and the lower edge of the first region. According to an embodiment of the present invention, the first surface may be convex toward the object side, while the second surface may be concave toward the object side.

[0009] According to an embodiment of the present invention, each of the plurality of first grooves has a first outer surface adjacent to the flange and a first inner surface adjacent to the first region, and the first inner surface and the first outer surface may be inclined based on a straight line passing through the low point of the first groove and parallel to the optical axis. Each of the plurality of second grooves has a second outer surface adjacent to the flange and a second inner surface adjacent to the first region, and the second inner surface and the second outer surface may be inclined based on a straight line passing through the high point of the second groove and parallel to the optical axis.

[0010] According to an embodiment of the present invention, the tilt angle of the first inner surface based on the straight line parallel to the optical axis is equal to or greater than the tilt angle of the first outer surface, and the tilt angle of the second inner surface based on the straight line parallel to the optical axis can be equal to or less than the tilt angle of the second outer surface. The shortest distance between the virtual first straight line connecting the low point of the first groove in the first direction perpendicular to the optical axis and the virtual second straight line connecting the low point of the second groove in the first direction perpendicular to the optical axis can be in the range of 20% to 40% of the thickness of the flange.

[0011] A camera module according to an embodiment of the present invention includes: a plurality of lenses stacked from an object side toward an image side; and spacers disposed on the outer circumference of adjacent lenses, wherein at least a first lens among the plurality of lenses includes: a first region having an effective diameter, the first region having a first surface on the object side and a second surface on the image side; and a flange portion disposed around the first region and having a third surface extending outward from the first surface and a fourth surface extending outward from the second surface, wherein the flange portion includes: a plurality of first grooves recessed from the third surface toward the fourth surface; and a plurality of second grooves recessed from the fourth surface toward the third surface, and each of the third surface and the fourth surface of the flange portion can face the spacer.

[0012] According to embodiments of the present invention, a lens holder may be disposed outside the plurality of lenses, and the lens holder may be made of a metallic material. The first lens may be made of a plastic material, and the plurality of lenses may include a second lens made of glass disposed on the object side or image side of the first lens.

[0013] According to an embodiment of the present invention, each of the plurality of first grooves has an annular shape with a different radius on a third surface and is arranged in a concentric circle shape, and each of the plurality of second grooves has an annular shape with a different radius on a fourth surface and is arranged in a concentric circle shape, and the low point of each of the plurality of first grooves and the high point of each of the plurality of second grooves can be arranged to be offset from each other. The distance between the plurality of first grooves can be less than the maximum width of each first groove, and the distance between the plurality of second grooves can be less than the maximum width of each second groove.

[0014] According to an embodiment of the present invention, the minimum distance between the plurality of first grooves and the upper edge of the first region may be less than the minimum distance between the plurality of second grooves and the lower portion of the first region. According to an embodiment of the present invention, the first surface of the first lens may be convex toward the object side, and the second surface of the first lens may be concave toward the object side.

[0015] According to an embodiment of the present invention, each of the plurality of first grooves has a first outer surface adjacent to the flange and a first inner surface adjacent to the first region, and the first inner surface and the first outer surface of the first groove may be inclined based on a straight line passing through the low point of the first groove and parallel to the optical axis. Each of the plurality of second grooves has a second outer surface adjacent to the flange and a second inner surface adjacent to the first region, and the second inner surface and the second outer surface may be inclined based on a straight line passing through the high point of the second groove and parallel to the optical axis.

[0016] According to an embodiment of the present invention, the inclination angle of the first inner surface based on a straight line parallel to the optical axis can be equal to or greater than the inclination angle of the first outer surface, and the inclination angle of the second inner surface based on a straight line parallel to the optical axis can be equal to or less than the inclination angle of the second outer surface. The shortest distance between a virtual first straight line connecting the low point of the first groove in a first direction perpendicular to the optical axis and a virtual second straight line connecting the low point of the second groove in a first direction perpendicular to the optical axis can be in the range of 20% to 40% of the thickness of the flange. The spacers can be respectively disposed on the plurality of first grooves and the plurality of second grooves.

[0017] According to embodiments of the present invention, the image sensor may be included; a cover glass located between the image sensor and the plurality of lenses; and a filter located between the cover glass and the plurality of lenses.

[0018] Beneficial effects

[0019] In embodiments of the invention, the groove in the flange of the lens is formed in an axial direction orthogonal to the optical axis, thereby suppressing changes in optical properties caused by the expansion and contraction of the lens in the direction orthogonal to the optical axis. According to embodiments of the invention, a groove is formed in the flange of a lens made of plastic along an axial direction orthogonal to the optical axis, thereby suppressing changes in the optical properties of the lens made of plastic. According to embodiments of the invention, thermal deformation of the lens can be compensated by providing a buffer structure on the flange of the lens having relatively large thermal changes.

[0020] In embodiments of the present invention, a groove is provided in the flange portion of the lens, and spacers are provided above and below the flange portion, thereby suppressing deformation caused by lens expansion. Permanent deformation of the lens can also be prevented.

[0021] According to embodiments of the present invention, the optical reliability of a camera module including at least one lens with a buffer structure on the flange can be improved. Additionally, the reliability of the camera module and the vehicle camera device having the camera module can be improved. Attached Figure Description

[0022] Figure 1 This is an example of a plan view of a vehicle to which the camera module according to an embodiment of the present invention is applicable.

[0023] Figure 2 This is a side cross-sectional view showing an example of a camera module according to an embodiment of the present invention.

[0024] Figure 3 Is Figure 2 A first example of a side cross-sectional view of a lens with a buffer structure on the flange in a camera module.

[0025] Figure 4 yes Figure 3 An example of a perspective view of a lens.

[0026] Figure 5 yes Figure 2 A second example of a buffer structure for the flange portion in a camera module.

[0027] Figure 6 This is a view showing an example in which the lens with the flange without a buffer structure in the comparative example is deformed.

[0028] Figure 7 yes Figure 2 A second example of a buffer structure for the flange portion in a camera module.

[0029] Figure 8 It shows Figure 7 A detailed structural diagram showing the relationship between the flange of the lens and the spacer.

[0030] Figure 9 This is an explanation Figure 7 A diagram of the buffer structure of the flange of the lens.

[0031] Figure 10 (A) and (B) are correct. Figure 7 A diagram comparing the distances between the upper and lower grooves in the flange of a lens.

[0032] Figure 11 This is another example of the flange portion of a lens in a camera module according to an embodiment of the present invention.

[0033] Figure 12 yes Figure 11 A detailed example of the flange portion of the lens.

[0034] Figure 13 yes Figure 9 Another example of a lens.

[0035] Figure 14 This is an example of a side cross-sectional view of a lens and spacer having a buffer structure in a camera module according to an embodiment of the present invention.

[0036] Figure 15 (A) is based on the thermal characteristics of the lens in the comparative example, and (B) shows... Figure 7 The diagram shows the thermal characteristics of the lens.

[0037] Figure 16 It is shown in Figure 7 A view of lens deformation in a structure without spacers in the lens. Detailed Implementation

[0038] Preferred embodiments of the present invention will now be described in detail with reference to the accompanying drawings. The spirit of the invention is not limited to the embodiments described herein, but can be implemented in various other forms, and one or more components can be selectively combined and substituted within the scope of the spirit of the invention. Furthermore, the terminology used in the embodiments of the invention (including technical and scientific terms), unless specifically defined and explicitly described, can be interpreted in the sense that is generally understood by one of ordinary skill in the art to which this invention pertains, and commonly used terms, such as those defined in dictionaries, should be interpretable in light of the contextual meaning of the relevant art.

[0039] Furthermore, the terminology used in the embodiments of the present invention is for illustrative purposes and is not intended to limit the invention. In this specification, the singular form may also include the plural form unless otherwise specified in the phrase, and where “at least one (or one or more) of A and B, C” is stated, it may include one or more of all combinations that can be combined with A, B, and C. In describing components of embodiments of the present invention, terms such as first, second, A, B, (a), and (b) may be used. Such terms are used only to distinguish the component from other components, and may not determine the nature, order, or sequence of the corresponding constituent elements. And when describing a component as being “connected,” “joined,” or “combined” to another component, the description may include not only being directly connected, joined, or combined to other components, but also being “connected,” “joined,” or “combined” through another component between the component and other components. Additionally, when described as being formed on or disposed “above” or “below” each component, the description includes not only when the two components are in direct contact with each other, but also when one or more other components are formed or disposed between the two components. Additionally, when expressed as "above" or "below," it can refer to the downward and upward directions with respect to a component. Furthermore, the several embodiments described below can be combined with each other unless specifically stated otherwise. Additionally, unless otherwise indicated, descriptions for other embodiments may be applied to any parts missing in the description of any of the embodiments.

[0040] <Example>

[0041] Figure 1 This is an example of a plan view of a vehicle to which the camera module according to an embodiment of the present invention is applicable. (Reference) Figure 1 According to an embodiment of the present invention, a vehicle camera system includes an image generation unit 11, a first information generation unit 12, second information generation units 21, 22, 23 and 24, and a control unit 14.

[0042] Image generation unit 11 may include at least one camera module 20 installed in the vehicle, and captures images of the front of the vehicle and / or the driver to generate a front image or an image of the vehicle's interior. Additionally, image generation unit 11 can generate images of the vehicle's surroundings by using camera module 20 to capture images not only of the front of the vehicle but also of the vehicle's surroundings in one or more directions. Here, the front and surrounding images can be digital images and may include color, black-and-white, and infrared images. Furthermore, the front and surrounding images can include still and moving images. Image generation unit 11 provides the driver image, the front image, and the surrounding images to control unit 14. Subsequently, first information generation unit 12 may include at least one radar and / or camera installed in the vehicle, and detects the front of the vehicle to generate first detection information. Specifically, first information generation unit 12 is installed in the vehicle and generates first detection information by detecting the position and speed of vehicles located in front of the vehicle, the presence and position of pedestrians, etc. Using the first detection information generated by the first information generation unit 12, control can be performed to maintain a constant distance between the vehicle and the vehicle in front, and the stability of vehicle operation can be improved under predetermined specific conditions (e.g., when the driver wants to change the vehicle's driving lane or when reversing to park). The first information generation unit 12 provides the first sensing information to the control unit 14.

[0043] The second information generation units 21, 22, 23, and 24 detect each side of the vehicle based on the forward image generated from the image generation unit 11 and the first detection information generated from the first information generation unit 12 to generate second sensing information. Specifically, the second information generation units 21, 22, 23, and 24 may include at least one radar and / or camera disposed in the vehicle, and may include the position of vehicles located on the sides of the vehicle, and may be the sensed speed and captured images. Here, the second information generation units 21, 22, 23, and 24 may be disposed at the two front corners of the vehicle, the side mirrors, and the rear center and rear corner, respectively. The vehicle camera system may include the camera module described in the following embodiments, and can protect the vehicle and objects from autonomous driving or surrounding safety by providing or processing information collected by the driver monitoring the front, rear, side, or corner areas of their own vehicle.

[0044] Multiple optical systems of the camera module according to embodiments of the present invention can be installed in a vehicle to enhance safety adjustment, autonomous driving functions, and convenience. Furthermore, the optical systems of the camera module are used in the vehicle as components for controlling Lane Keeping Assist System (LKAS), Lane Departure Warning System (LDWS), and Driver Monitoring System (DMS). This camera module for vehicles achieves stable optical performance even with variations in ambient temperature and offers a competitively priced module, thereby ensuring the reliability of vehicle components.

[0045] In the description of this invention, the first lens refers to the lens closest to the object side, and the last lens refers to the lens closest to the image side (or sensor surface). The last lens may include a lens adjacent to the image sensor. Unless otherwise stated in the description of this invention, all units for lens radius, thickness / distance, TTL, etc., are mm. In this specification, the shape of the lens is shown based on its optical axis. For example, the fact that the object side of the lens is convex or concave means that the vicinity of the optical axis is convex or concave on the object side of the lens, and the periphery of the optical axis is not convex or concave. Therefore, even if the object side of the lens is described as convex, the portion of the object side of the lens surrounding the optical axis may be concave, and vice versa. In this specification, it should be noted that the thickness and radius of curvature of the lens are measured based on the optical axis of the lens. That is, a convex surface of the lens means that the lens surface in the region corresponding to the optical axis has a convex shape, while a concave surface of the lens means that the lens surface in the region corresponding to the optical axis has a concave shape. Furthermore, "object-side surface" can refer to the lens surface facing the object side based on the optical axis, while "image-side surface" can refer to the lens surface facing the imaging surface based on the optical axis.

[0046] Figure 2 This is a side cross-sectional view illustrating an example of a camera module according to an embodiment of the present invention. Figure 3 Is Figure 2 A first example of a side cross-sectional view of a lens with a buffer structure on the flange in a camera module. Figure 4 yes Figure 3 An example of a perspective view of a lens. Figure 5 yes Figure 2 A second example of a buffer structure for the flange portion in a camera module. Figure 6 This is a view showing an example (in which the lens with the unbuffered flange in the comparative example is distorted). Figure 7 yes Figure 2 A second example of a buffer structure for the flange portion in a camera module. Figure 8 It shows Figure 7 A detailed structural diagram showing the relationship between the lens flange and the spacer. Figure 9 This is an explanation Figure 7A diagram of the buffer structure of the lens flange. Figure 10 (A) and (B) are correct. Figure 7 A diagram comparing the distances between the upper and lower grooves in the flange of a lens.

[0047] refer to Figures 2 to 4 According to an embodiment of the present invention, a camera module 1000 includes a housing 500, a lens portion 100 having a plurality of lenses 111, 113, 115 and 117, spacers 131 and 133, a main board 190 and an image sensor 192. The camera module 1000 may include a cover glass 194 and a filter 196 between the lens portion 100 and the image sensor 192.

[0048] In the lens section 100, at least three or more lenses can be stacked; for example, three to seven lenses or three to five lenses can be stacked. The lens section 100 may include at least three or more solid lenses, and the solid lenses may include at least one or two or more plastic lenses. For example, the lens section 100 may use a mixture of plastic lenses and glass lenses. In the case of using plastic lenses in a vehicle, the price can be reduced compared to lenses made of glass, and the path of light can be easily controlled by providing aspherical surfaces on the incident and exit surfaces. In this case, as... Figure 6 As shown, the plastic lens 110 can expand or contract according to temperature changes, and when the flange 110A does not have the buffer structure BX C, the incident side surface and the exit side surface of the lens 110 can be separated. The height can vary and can affect the optical properties of the lens 110.

[0049] In embodiments of the present invention, a buffer structure or component is provided to the plastic lens used in the lens section 100 to suppress changes in optical properties. This buffer structure may be provided on the flange portion. Here, the coefficient of thermal expansion (CTE) of the plastic material may be 5 times higher than that of the glass material, and the change in refractive index as a function of temperature (dN / dT) may be 10 times lower than that of the glass material. Here, dN is the change in refractive index of the lens, and dT represents the change in temperature.

[0050] For ease of description, the lens section 100 can be described as follows: a first lens 111, a second lens 113, a third lens 115, and a fourth lens 117 stacked from the object side toward the image sensor 192 are aligned in the optical axis Lz, and a buffer structure is applied to at least one lens. For example, the lens with the buffer structure, made of plastic material, can be the lens closest to the object side, or it can be one or two lenses disposed between the image sensor 192 and the lens closest to the subject. The buffer structure can include a structure with grooves on the upper and lower surfaces of the lens. The second lens 113, made of plastic according to an embodiment of the invention, has a buffer structure 30 that can provide buffering when the volume of the second lens 113 expands according to the ambient temperature. The buffer structure 30 can be disposed on the flange portion 113A of the second lens 113 and can be configured to provide elasticity in a first direction or circumferential direction orthogonal to the optical axis Lz.

[0051] The housing 500 includes a cover 511 and a lens mount 513, and may have an opening 101 extending from the top to the bottom. The cover 511 and lens mount 513 may be integrally formed, or may be separate from or combined with each other. The cover 511 may be a cover attached from the top to the outer periphery of the lens mount 513, with an inner protrusion 521 supporting the circumference of the first lens 111, and an inner protrusion 523 of the lens mount 513 may be disposed below the flange 117A of the fourth lens 117. The lens mount 513 protects and supports the outer surface of the lens portion 100. The lens mount 513 supports the outer surfaces of multiple lenses 111, 113, 115, and 117. The lens mount 513 may be a lens barrel, and may have one or more lens barrels. The top view shape of the housing 500 may include a cylindrical shape or a polygonal prism shape. The housing 500 may be formed of a material such as resin, plastic, or metal. A hydrophilic material may be coated or applied to the surface of the housing 500. Here, the lens mount 513 can be formed of a metallic material, for example, it can be selected from Al, Ag, or Cu, and can be Al or an Al alloy. When the lens mount 513 is made of metal, heat transferred in the lateral direction of lenses 111, 113, 115, and 117 can be dissipated, and thermal deformation of lenses 111, 113, 115, and 117 can be suppressed. Although the heat dissipation effect of the camera module 1000 can be improved by using a lens mount 513 made of metal, the difference in the coefficient of thermal expansion (CTE) between the lens and a lens made of plastic becomes larger. That is, when the diameter of the plastic lens is 4 mm or larger, a length deformation of 15 μm or larger may occur. Here, at least one of the plurality of lenses 111, 113, 115, and 117 may include a gap between itself and the lens mount 513.

[0052] Each of lenses 111, 113, 115, and 117 may include an effective region (having an effective diameter through which light enters) and flanges 111A, 113A, and 117A (which are ineffective regions outside the effective region). The ineffective region may be a region where light is blocked by spacers 131 and 133. Flanges 111A, 113A, and 117A may extend circumferentially relative to the optical axis Lz within the effective region of lenses 111, 113, 115, and 117. At least one of lenses 111, 113, 115, and 117, lens 115, may be flangeless or have a relatively short length.

[0053] The first lens 111 is the lens closest to the subject, and at least one or both of its upper incident surface and its lower exit surface can be spherical or aspherical. The upper or lower surface of the first lens 111 can be concave or convex. The first lens 111 can be made of plastic to prevent discoloration when the camera module 1000 is exposed to light from inside or outside the vehicle, and can be made of glass or plastic when the camera module 1000 is placed inside the vehicle. The second lens 113 can be made of plastic. The second lens 113 is disposed between the first lens 111 and the third lens 115, and can have a buffer structure 30 on the flange 113A. The third lens 115 can be made of glass or plastic. The fourth lens 117 is the lens closest to the image sensor 192 and can be made of glass or plastic. The upper and / or lower surfaces of the second lens 113, the third lens 115, and the fourth lens 117 can be spherical or aspherical, but are not limited thereto. When the lens is made of plastic, the invention can include the buffer structure disclosed below.

[0054] Lenses 111, 113, 115, and 117 of the lens section 100 can be connected from the top toward the sensor side to the lens mount 513 of the housing 500, either in opposite directions or in both directions. A gasket 121, which may be a waterproof ring, may be included between the cover 511 and the lens mount 513.

[0055] Spacers 131 and 133 can be disposed outside lenses 111, 113, 115, and 117 of the lens section 100, and spacers 131 and 133 can block light leakage or entry to the outside, and can adjust the distance between two adjacent lenses. Spacers 131 and 133 can be defined as spacers. For example, spacers 131 and 133 may include a first spacer 131 disposed on the outer periphery of the first lens 111 and the second lens 113, and a second spacer 133 disposed on the outer periphery of the second lens 131 and the fourth lens 117. The second spacer 133 may have an inner peripheral surface that supports the outer side of the third lens 115.

[0056] The upper surface of the second spacer 133 can contact the second lens 113. The lower surface of the second spacer 133 can contact the fourth lens 117. The second spacer 133 may include a first portion disposed between the flange portion 113A of the second lens 113 and the lens mount 513, and a second portion disposed between the flange portion 117A of the fourth lens 117 and the lens mount 513. The second spacer 133 can protect the outer side of the third lens 115 as well as the outer sides of the second lens 113 and the fourth lens 117.

[0057] The first spacer 131 and the second spacer 133 may be made of the same material or different materials; for example, they may be made of a light-absorbing material. The first spacer 131 and / or the second spacer 133 may comprise a polyethylene (PE) film or a polyester (PET) film. As another example, the first spacer 131 and / or the second spacer 133 may have a metal or alloy and an oxide film formed on their surfaces. The metal or alloy may include at least one of In, Ga, Zn, Sn, Al, Ca, Sr, Ba, W, U, Ni, Cu, Hg, Pb, Bi, Si, Ta, H, Fe, Co, Cr, Mn, Be, B, Mg, Nb, Mo, Cd, Sn, Zr, Sc, Ti, V, Eu, Gd, Er, Lu, Yb, Ru, Y, and La. The oxide film may be an oxide material treated with copper as a black or brown oxide.

[0058] Image sensor 192 can be mounted on motherboard 190. Image sensor 192 can be mounted, seated, contacted, fixed, temporarily fixed, supported, or coupled to motherboard 190 on a plane intersecting the optical axis. Alternatively, according to another embodiment, motherboard 190 can have a recess or hole (not shown) capable of receiving image sensor 192, and this embodiment is not limited to the specific form in which image sensor 192 is mounted on motherboard 190. Motherboard 190 can be a rigid PCB or an open-circuit PCB.

[0059] Image sensor 192 performs the function of converting light passing through lens portion 100 into image data. A sensor holder can be disposed below housing 500 to surround image sensor 192 and protect it from external objects or impacts. Image sensor 192 can be any of charge-coupled device (CCD), complementary metal-oxide-semiconductor (CMOS), CPD, and CID. When there are multiple image sensors 192, one image sensor can be a color (RGB) sensor, while another image sensor can be a monochrome sensor.

[0060] A filter 196 may be disposed between the lens portion 100 and the image sensor 192. The filter 196 can filter light corresponding to a specific wavelength range passing through lenses 111, 113, 115, and 117. The filter 196 may be an infrared (IR) blocking filter that blocks infrared light or an ultraviolet (UV) blocking filter that blocks ultraviolet light, but this embodiment is not limited to these. The filter 196 may be disposed on the image sensor 192. A cover glass 194 is disposed between the filter 196 and the image sensor 192, protecting the upper part of the image sensor 192 and preventing degradation of the reliability of the image sensor 192.

[0061] The camera module 1000 according to an embodiment of the present invention may include a driving member (not shown), which can move or tilt a lens barrel having at least one lens in the optical axis direction and / or in a direction orthogonal to the optical axis direction. The camera module may include an autofocus (AF) function and / or an optical image stabilizer (OIS) function.

[0062] Reference Figure 3 and Figure 4 To describe the lens flange and buffer structure. (Reference) Figure 3 and Figure 4 Lens 113 may include a first region A1 and a second region A2 surrounding the outer periphery of the first region A1. The first region A1 has an effective diameter through which light travels, while the second region A2 blocks light. Lens 113 may include a flange 113A, which is the second region A2, extending around the first region A1 in a direction perpendicular to the optical axis Lz. The flange 113A may be integrally formed with lens 113 or made of the same plastic material. Lens 113 may include a first region A1 having an effective diameter, a first surface S1 on the object side where light is incident, and a second surface S2 on the image side or sensor side where light is emitted. The effective diameter of the first surface S1 and the effective diameter of the second surface S2 may be the same or different. The first surface S1 may be convex towards the object side or concave towards the image side (or sensor side), while the second surface S2 may be concave towards the object side or convex towards the image side (or sensor side). The concave or convex structure of the first surface S1 and the second surface S2 can be varied according to the lens characteristics and camera type. As another example, ... Figure 13 As shown, both the first surface S1 and the second surface S2a of the lens 113 can be convex.

[0063] The flange portion 113A may include a third surface S3 extending outward from a first edge Sa of the first surface S1 and a fourth surface S4 extending outward from a second edge Sb of the second surface S2. The third surface S3 may include a horizontal plane or an inclined surface. The fourth surface S4 may include a horizontal plane or an inclined surface.

[0064] like Figure 3 and Figure 5 As shown, the flange portion 113A may include one or more buffer structures 30. The buffer structure 30 may include a first groove 31 recessed on the third surface S3 and a second groove 33 recessed on the fourth surface S4. The first groove 31 and / or the second groove 33 may not overlap with the spacers 131 and 133 in a first direction X orthogonal to the optical axis Lz. The upper surface of the first groove 31 may face the lower surface of the first spacer 131 or may overlap in the optical axis direction. The second groove 33 may face the upper surface of the second spacer 133 or may overlap in the optical axis direction. The first groove 31 and the second groove 33 may be alternately arranged on different planes based on the optical axis Lz. The buffer structure 30 with the first groove 31 and the second groove 33 can prevent a decrease in the rigidity of the flange portion 113A and can shrink or expand according to the thermal deformation of the lens 113.

[0065] The first groove 31 includes a recessed groove 31 in the direction from the third surface S3 to the fourth surface S4, and one or more first grooves 31 may be disposed on the third surface S3. When viewed from a top view, the first groove 31 may have a circular or annular shape. The plurality of first grooves 31 may be formed in a circular or annular shape, and the plurality of first grooves 31 may be arranged as concentric circles with different radii. The plurality of first grooves 31 may overlap in a direction orthogonal to the optical axis Lz. The second groove 33 may be recessed in the direction from the fourth surface S4 toward the third surface S3. One or more second grooves 33 may be disposed on the fourth surface S4. When viewed from a top view, the second groove 33 may have a circular or annular shape. The plurality of second grooves 33 may be formed in a circular or annular shape, and the plurality of second grooves 33 may be arranged as concentric circles with different radii. The plurality of second grooves 33 may overlap in a first direction perpendicular to the optical axis. The side profile of the first groove 31 and / or the second groove 33 may have a triangular shape. The triangular shape may be a shape in which two points contacting the upper or lower surface are connected to the deepest point. The portion with the deepest point can be a corner surface, a curved surface, or a flat surface. The first groove 31 can have a triangular shape including a wide upper portion and a narrow lower portion, while the second groove 33 can have a triangular shape including a wide lower portion and a narrow upper portion, i.e., an inverted triangular shape.

[0066] Here, the constructions with and without a buffer structure in the flange of the lens can be distinguished as shown in Table 1. Table 1 is a table of measurements of the non-offset force and Z-axis variation for each lens sample.

[0067] Table 1

[0068]

[0069] In Table 1, samples 1 and 3 do not have a buffer structure in the flange portion, and the length of the flange portion in sample 3 is longer than that in sample 1 (see Table 1). Figure 6 Sample 2 is a lens that includes a buffer structure with a groove on the flange (see...). Figure 3 ), and sample 4 is a lens with a buffer structure including two grooves. Figure 5 Samples 1-4 were tested by providing a lens mount only on the outer side without providing spacers on the flange. The total elastic modulus (Keq) of each sample 1-4 is the sum of the elastic moduli (K1, K2) at the effective diameter and the flange. That is, 1 / Keq = 1 / K1 + 1 / K2. As shown in Table 1, the value of the elastic modulus decreases as the length of the flange increases, and the elastic modulus Keq of the flange with two grooves in the buffer structure is higher than that of the flange with one groove in the buffer structure. In addition, it can be seen that the Z-axis variation of the lens is improved by the flange with the grooves. The Z-axis variation of the lens can vary depending on the number, depth, or width of the grooves. Therefore, in the embodiment of the present invention, since the buffer structure 30 with at least two grooves 31 and 33 is provided in the flange 113A of the lens 113, the thermal expansion of the lens 113 can be elastically relieved and the variation on the optical axis (i.e., the Z-axis) can be suppressed.

[0070] like Figure 7As shown, a plurality of first grooves 31 are spaced apart from each other and may have the same or different depths T2. When the depths T2 of the plurality of first grooves 31 are different from each other, the region adjacent to the first edge Sa of the first region A1, that is, the groove adjacent to the first surface S1, has the deepest depth, and the groove adjacent to the outer surface S5 of the flange portion 113A has the lowest depth. Conversely, when the depths T2 of the plurality of first grooves 31 are different from each other, the region adjacent to the first edge Sa of the first region A1, that is, the groove adjacent to the first surface S1, has the lowest depth, and the groove adjacent to the outer surface S5 of the flange portion 113A has the deepest depth. When the depths T2 of the first grooves 31 are set differently, the expansion of the first grooves 31 in the circumferential direction from the center of the lens 113 can be gradually suppressed. The first edge Sa may be the boundary point between the flange portion 113A and the first surface S1. The depth T2 of the first groove 31 can be less than 50% of the thickness T1 of the flange portion 113A, and can be within the range of 20% or more, 20% to 40%, or 20% to 30% of the thickness T1 of the flange portion 113A. When the depth T2 of the first groove 31 is greater than the above range, it is difficult to mold the lens, and when the depth T2 of the first groove 31 is less than the above range, the buffering function against lens expansion may deteriorate.

[0071] like Figure 7 As shown, the distance F1 between adjacent first grooves 31 can be less than the maximum width W1 of the first groove 31. When the distance F1 between the first grooves 31 is greater than the distance W1, the buffering function in the horizontal direction may deteriorate, and the degree of deformation of the lens 113 in the optical axis Lz direction may increase. Therefore, the expansion relief in the horizontal direction can be maximized by the depth T2 and the maximum width W1 of the first groove 31. A plurality of second grooves 33 can be spaced apart from each other and can have the same or different depths T3. When the depths T3 of the plurality of second grooves 33 are different from each other, the groove adjacent to the second edge Sb or the second surface S2 of the effective region is the deepest, and the groove adjacent to the outer surface S5 of the flange portion 113A can be set to the lowest depth. Conversely, when the depths T3 of the plurality of second grooves 33 are different from each other, the groove in the region adjacent to the second edge Sb of the first region A1 or the groove adjacent to the second surface S2 is the deepest, while the groove adjacent to the outer surface S5 of the flange portion 113A can be set to the lowest depth. When the depth T3 of the second groove 33 is set differently, the expansion of the second groove 33 in the circumferential direction from the center of the lens 113 can be gradually suppressed. The second edge Sb can be the boundary point between the flange portion 113A and the second surface S2.

[0072] The depth T3 of the second groove 33 may be less than 50% of the thickness T1 of the flange portion 113A, and may be 20% or more of the thickness T1 of the flange portion 113A, in a range of 20% to 40% or 20% to 30%. When the depth T3 of the second groove 33 is greater than the above range, it is difficult to mold the lens, and when the depth T3 of the second groove 33 is less than the above range, the buffering function against lens expansion may deteriorate. The distance F2 between adjacent second grooves 33 may be less than the maximum width W2 of the second grooves 33. When the distance F2 between the second grooves 33 is greater than the width W2, the buffering function in the horizontal direction may deteriorate, and the degree of deformation of the lens 113 in the optical axis direction may increase. Accordingly, the expansion relief in the horizontal direction can be maximized by the depth T3 and the maximum width W2 of the second grooves 33.

[0073] The minimum distance M between the first edge Sa of the first region A1 of the lens 113 and the closest first groove 31 may be greater than the maximum width W1 of the first groove 31, or may be greater than the pitch or period of the first groove 31. The minimum distance M may be greater than the distance between the outer surface S5 of the flange portion 113A and the first groove 31 closest to the outer surface S5. That is, the first grooves 31 may be disposed closer to the outer surface S5 than to the first edge Sa. Accordingly, when the first grooves 31 buffer the lens expansion in the circumferential direction in the lens 113, the lens holder 513 that supports the first grooves 31 and the outer surface S5 of the flange portion 113A supports the outer surface S5 of the flange portion 113A, thereby improving the buffering effect.

[0074] The minimum distance N between the second edge Sb of the effective area of the lens 113 and the closest second groove 33 may be greater than the maximum width W2 of the second groove 33, and may be greater than the distance between the outer surface S5 of the flange portion 113A and the second groove 33 closest to the outer surface S5. That is, the second grooves 33 may be disposed closer to the outer surface S5 of the flange portion 113A than to the first edge Sa. Accordingly, the lens holder 513 that supports the second grooves 33 and the outer surface S5 of the flange portion 113A allows the lens to expand in the circumferential direction within the lens through the second grooves 33. Therefore, the lens holder 513 that supports the second grooves 33 and the outer surface S5 of the flange portion 113A can relieve the lens expansion in the circumferential direction in the lens, and can further improve the relief effect by supporting the side surface of the flange portion 113A in the lens holder 513. Here, the minimum distances N and M between the first and second edges Sa and Sb and the first and second grooves 31 and 33 are equal to each other, or have a relationship of N>M, or may have a relationship of M<N (as Figure 11 shown in).

[0075] The minimum distances M and N can be 5% or more of the length of the flange portion 113A of the lens 113, for example, in the range of 5% to 20% or 10% to 15%. The length of the flange portion 113A can be equal to the thickness T1, or 1.5 mm or more greater than the thickness T1, or 2 mm or more greater.

[0076] refer to Figure 7 The flange portion 113A has a plurality of first grooves 31 arranged in the third surface S3 along the circumferential direction and a plurality of second grooves 33 arranged in the fourth surface S4. Two or more grooves 33 are arranged in the circumferential direction. The low point P1 of the lowest point in the first groove 31 in the direction parallel to the optical axis can be arranged to be offset from the low point P2 of the highest point in the second groove 33 in the horizontal direction. For example, a straight line perpendicularly passing through the low point P1 of the first groove 31 can be arranged alternately with a straight line perpendicularly passing through the low point P2 of the second groove 33. This straight line can be parallel to the optical axis Lz. The shortest distance G between the virtual straight line connecting the low point P1 of the first groove 31 in the first direction X perpendicular to the optical axis Lz and the virtual straight line connecting the low point P2 of the second groove 33 in the first direction X perpendicular to the optical axis Lz can be 40% or less of the thickness T1 of the flange portion 113A, or in the range of 20% to 30% or 20% to 40%. The shortest distance G can be the distance at which the efficiency of jetting liquid material through the first groove 31 and the second groove 33 does not decrease when the lens 113 is jet-formed. The shortest distance G can be 0.2 mm or greater, or 0.2 mm to 0.3 mm, or 0.2 mm to 0.4 mm.

[0077] refer to Figure 8 The first groove 31 may include a first outer surface R1 adjacent to the side surface of the flange 113A based on the low point P1, and a first inner surface R2 facing the first outer surface R1. The first outer surface R1 may be inclined at a first angle A based on an axis perpendicular to the low point P1, while the first inner surface R2 may be inclined at a second angle B. The first angle A and the second angle B may be the same as or different from each other. The first angle A may be greater than or equal to the second angle B. Therefore, since the second angle B is set to be larger than the first angle A, the expansion at the upper part of the lens can be effectively mitigated. The first angle A may be 15 degrees or greater, for example, in the range of 15 degrees to 45 degrees. The second angle B may be 45 degrees or less, for example, in the range of 15 degrees to 45 degrees. When the first angle A is less than 15 degrees, the elasticity transmitted from the first inner surface R2 to the first outer surface R1 may decrease. When the second angle B is greater than 45 degrees, the expansion force transmitted to the first inner surface R2 may decrease.

[0078] like Figure 9As shown, when the first angle A and the second angle B are different, the second angle B can be greater than the first angle A, and the second angle B can be 10 to 30 degrees larger than the first angle A. Therefore, since the second angle B is set to be greater than the first angle A, the expansion at the upper part of the lens can be effectively mitigated.

[0079] In the buffer structure 30 of the flange portion 113A, the second groove 33 may include a second outer surface R3 adjacent to the side surface of the flange portion 113A based on the low point P2, and a second inner surface R4 facing the second outer surface R3. The second outer surface R3 may be inclined at a third angle C based on an axis perpendicular to the low point P1, and the second inner surface R4 may be inclined at a fourth angle D. The third angle C and the fourth angle D may be the same as or different from each other. The third angle C may be smaller than the fourth angle D. Therefore, since the third angle C is set to be smaller than the fourth angle D, the expansion at the lower part of the lens can be effectively relieved. The fourth angle D may be 15 degrees or greater, for example, in the range of 15 degrees to 45 degrees. The third angle C may be 45 degrees or less, for example, in the range of 15 degrees to 45 degrees. When the fourth angle D is less than 15 degrees, the expansion force transmitted to the second inner surface R4 may be reduced. When the third angle C is greater than 45 degrees, the elasticity transmitted from the second inner surface R4 to the second outer surface R3 may be reduced. As the expansion force transmitted to the flange 113A decreases, the first region A1 may deform in the optical axis direction, which may make it difficult to control the changes in the optical properties (MTF: modulation transfer function) of the lens 113. When the third angle C and the fourth angle D are different, the fourth angle D can be greater than the third angle C, and the fourth angle D can be 10 degrees to 30 degrees larger than the third angle C.

[0080] In an embodiment of the present invention, a first spacer 131 may be disposed on the third surface S3 of the flange portion 113A of the lens 113, and the first spacer 131 may face the third surface S3 and cover the first groove 31. The area of ​​the first spacer 131 is larger than the area of ​​the upper surface of the first groove 31 and can adhere to the third surface S3 of the flange portion 113A. A second spacer 133 may be disposed below the fourth surface S4 of the flange portion 113A of the lens 113, and the second spacer 133 may face the fourth surface S4 and cover the second groove 33. The area of ​​the second spacer 133 is larger than the area of ​​the upper surface of the second groove 33 and can be in close contact with the fourth surface S4 of the flange portion 113A. The first spacer 131 and the second spacer 133 may press the third surface S3 and the fourth surface S4 of the flange portion 113A. When the lens 113 expands in the circumferential direction, the first spacer 131 and the second spacer 133 can prevent the flange portion 113A from being contacted and prevent the flange portion 113A from deforming in the vertical direction through the elasticity of the first groove 31 and the second groove 33. In embodiments of the present invention, the first surface S1 of the lens 113 may be convex and the second surface S2 may be concave, or the first surface S1 may be convex and the second surface S2 may be convex. In the flange portion 113A, the second groove 33 may be configured to be closer to the effective area than the first groove 31.

[0081] like Figure 10 As shown in (A), the shortest distance G between the low point P1 of the first groove 31 and the low point P2 of the second groove 33 in the flange portion 113A can be less than 30% of the thickness T1 of the flange portion 113A, such as Figure 10 As shown in (B), when the distance G2 is 30% or more of the thickness T1 of the flange 113A, and when the inner angles of the first groove 31 or the second groove 33 are the same, the number of arrangements of the first groove 31 and the second groove 33 can be increased or decreased by the difference between the depths T2 and T3 of the first groove 31 and the second groove 33.

[0082] refer to Figure 11The flange 113B of lens 113 may include a buffer structure having a first groove 31A on a third surface S3 and a second groove 33A on a fourth surface S4. This buffer structure may be arranged in the order of the first groove 31A and the second groove 33A based on the optical axis. In this buffer structure, the depth T4 of the first groove 31A and the depth T5 of the second groove 33A may be the same or different. The depth T4 of the first groove 31A may be 20% or more of the thickness T1 of the flange 113A, for example, between 20% and 30% or in the range of 20% to 40%. The depth T5 of the second groove 33A may be 20% or more of the thickness T1 of the flange 113A, for example, between 20% and 30% or in the range of 20% to 40%. The first angle A of inclination of the first outer surface R1 based on a straight line perpendicular to the low point P1 of the first groove 31A and the second angle B of inclination of the first inner surface R2 may be the same or different from each other. The first angle A can be 45 degrees or less, for example, in the range of 15 to 45 degrees. The second angle B can be 15 degrees or greater, for example, in the range of 15 to 45 degrees. When the first angle A and the second angle B are different, the second angle B can be greater than the first angle A, and the second angle B can be 10 to 30 degrees greater than the first angle A. In the second groove 33A, the inclination angle of the second inner surface R4 can be greater than the inclination angle of the second outer surface R3. Therefore, in the first groove 31A of the flange portion 113B, the first outer surface R1 is more inclined than the first inner surface R2, and the second inner surface R4 in the second groove 33A is more inclined than the second outer surface R3. When it is more inclined than the outer surface R3, the transmitted lens expansion can be mitigated.

[0083] like Figure 11 and Figure 12 As shown, the first surface S11 of the lens 113 is concave and the second surface S12 is convex, or the first surface S11 is convex and the second surface S12 is concave. In the flange portion 113B, the first groove 31A can be configured to be closer to the effective area than the second groove 33A. That is, the first groove 31A and the second groove 33A can be arranged in a sawtooth pattern based on the optical axis.

[0084] like Figure 13 As shown, both the first surface S1 and the second surface S2a of lens 113 can be convex, and as another example, at least one of the first and second surfaces is concave or convex, or both surfaces can be concave. Table 2 contains values ​​obtained by measuring the amount of change along the Z-axis of the lens based on the presence or absence of a buffer structure, for comparison between the comparative examples and embodiments of the present invention.

[0085] Table 2

[0086]

[0087] It can be seen that compared with the comparative example in which the flange portion of the lens has no buffer structure, the Z-axis change in the lens including the flange portion with the buffer structure is reduced. In addition, it can be seen that when the angles satisfy A < B and D < C in the first groove and the second groove, the Z-axis change is further reduced. Furthermore, it can be seen that when the dimensions of the first groove and the second groove are larger based on the shortest distance between the first groove and the second groove (G < G2), a greater reduction in Z-axis change is achieved.

[0088] As shown in Figure 14 herein, the camera module 1000 may define the buffer structure 30 of the lens 113 as a first buffer structure, and define the buffer structure 40 of the spacer 133A as a second buffer structure. The spacer 133A having the second buffer structure 40 may be disposed on at least one, or two or more of the first to fourth lenses. Reference may be made to the description of the embodiments disclosed above for the first buffer structure 30 of the lens 113, and the second buffer structure 40 of the spacer 133A will be described hereinafter. The second buffer structure 40 is disposed on the spacer 133A outside the flange region of the third lens 115, and may include at least one groove on the upper surface and the lower surface of the spacer 113A. One or more first grooves 41 may be provided from the upper surface of the spacer 133A toward the lower surface of the spacer 133A. One or more second grooves 43 may be provided from the lower surface of the spacer 133A toward the upper surface of the spacer 133A.

[0089] The spacer 133A having the second buffer structure 40 may be disposed between the second lens 113 and the fourth lens 117. The second buffer structure 40 may be in contact with the second lens 113 and the fourth lens 117. The second buffer structure 40 may be in contact with the outer surface of the third lens 115. The recessed groove 41 on the upper surface of the second buffer structure 40 may face the lower surface of the flange portion 113A of the second lens 113. The recessed groove 43 on the lower surface of the second buffer structure 40 may face the upper surface of the flange portion 117A of the fourth lens 117. Each of the upper groove 41 and the lower groove 43 of the second buffer structure 40 may not overlap with the effective diameter region of the third lens 115 in the first direction X orthogonal to the optical axis Lz. Since the upper groove 41 and the lower groove 43 of the second buffer structure 40 do not overlap with the outer surface of the third lens 115 in the first direction X orthogonal to the optical axis Lz, thermal expansion of the third lens 115 can be buffered in the different grooves 41 and 43.

[0090] The third lens 115, disposed inside the spacer 133A with the second buffer structure 40, can be made of plastic. The second buffer structure 40, applied to the spacer 133A supporting the plastic third lens 115 according to an embodiment of the invention, can buffer the volume of the third lens 115 as its volume expands with ambient temperature. The second buffer structure 40 can be disposed on the spacer 133A located outside the flange region of the third lens 115, and can be provided with a structure that provides elasticity in a direction orthogonal to the optical axis Lz or in the circumferential direction.

[0091] Figure 15 (A) is the Z-axis variation (unit: mm) of the lens in the comparative example, while Figure 15 (B) is the Z-axis variation (unit: mm) of the lens according to an embodiment of the present invention. Figure 15 As shown in (A), in the comparative example, there is no buffer structure on the flange of the lens, and it can be seen that the amount of variation (in mm) in the Z-axis direction in the effective area of ​​the lens is greater than that in the comparative example. Figure 15 The change in lens (B) is significantly higher. Furthermore, as... Figure 16 As shown, when there is no spacer on the flange of the lens, a large change in the Z-axis direction of the lens occurs even when the lens has a buffer structure. In this case, by arranging spacers or other lens mount protrusions on the third and fourth surfaces of the flange with the buffer structure, the change in the Z-axis direction of the lens can be suppressed due to the elastic effect of the buffer structure in the flange.

[0092] Embodiments of the present invention address temperature variations from -20 degrees Celsius or lower to 70 degrees Celsius or higher. For example, in a vehicle camera module, a temperature variation from -40 degrees Celsius to 85 degrees Celsius is possible. When a plastic lens is used, the buffer structure, having a groove in the outer flange of the plastic lens, provides elasticity for the expansion or contraction of the plastic lens due to temperature changes, thereby suppressing the amount of variation in the effective area of ​​the lens along the optical axis. Consequently, variations in the optical characteristics of camera modules employing plastic lenses can be reduced.

[0093] The features, structures, effects, etc., described in the above embodiments are included in at least one embodiment of the present invention, and are not necessarily limited to one embodiment. Furthermore, the features, structures, effects, etc., illustrated in each embodiment can be combined or modified by those skilled in the art for other embodiments. Therefore, anything relating to such combinations and modifications should be interpreted as also included within the scope of the present invention. Additionally, although embodiments have been described above, they are merely examples and not limitations of the invention, and those skilled in the art will understand that various modifications and applications not illustrated are possible without departing from the essential characteristics of the embodiments. For example, each component specifically shown in the embodiments can be implemented by modification. Furthermore, differences relating to such modifications and applications should be interpreted as included within the scope of the invention as defined in the appended claims.

Claims

1. A camera lens for a vehicle, comprising: A first region, the first region having an effective diameter, the first region having a first surface on the object side and a second surface on the image side; and A flange portion, disposed around the first region, has a third surface extending outward from a first edge of the first surface and a fourth surface extending outward from a second edge of the second surface. The flange portion is an optically ineffective region. The flange portion includes: a plurality of first grooves recessed from the third surface of the flange portion toward the fourth surface; and a plurality of second grooves recessed from the fourth surface toward the third surface. Wherein, the first edge is the boundary point between the flange portion and the first surface. The second edge is the boundary point between the flange and the second surface. Wherein, the minimum distance between the first edge of the first region and the first groove closest to the first edge is greater than the pitch between the plurality of first grooves. Each of the plurality of first grooves has an annular shape with a different radius in the third surface and is arranged in a concentric circular shape. Each of the plurality of second grooves has an annular shape with a different radius in the fourth surface and is arranged in a concentric circular shape. The low point of each of the plurality of first grooves and the high point of each of the plurality of second grooves are arranged to be offset from each other.

2. The camera lens for a vehicle according to claim 1, wherein, The distance between the plurality of first grooves is less than the maximum width of each of the first grooves, and The spacing between the plurality of second grooves is less than the maximum width of the second groove.

3. The camera lens for a vehicle according to claim 1, wherein, The minimum distance between the plurality of first grooves and the first edge of the first region is less than the minimum distance between the plurality of second grooves and the second edge of the first region, and Wherein, the minimum distance between the first groove and the first edge is greater than the distance between the outer surface of the flange portion located between the third surface and the fourth surface and facing away from the first region and the first groove closest to the outer surface of the flange portion.

4. The camera lens for a vehicle according to any one of claims 1 to 3, in, The first surface is convex towards the object side, and The second surface is concave towards the object.

5. The camera lens for a vehicle according to claim 1, wherein, Each of the plurality of first grooves has a first outer surface adjacent to the flange and a first inner surface adjacent to the first region, and The first inner surface and the first outer surface are inclined based on a straight line passing through the low point of the first groove and parallel to the optical axis.

6. The camera lens for a vehicle according to claim 5, wherein, Each of the plurality of second grooves has a second outer surface adjacent to the flange and a second inner surface adjacent to the first region. The second inner surface and the second outer surface are inclined based on a straight line passing through the high point of the second groove and parallel to the optical axis.

7. The camera lens for a vehicle according to claim 6, wherein, The tilt angle of the first inner surface based on the straight line parallel to the optical axis is equal to or greater than the tilt angle of the first outer surface. Wherein, the tilt angle of the second inner surface based on the straight line parallel to the optical axis is equal to or less than the tilt angle of the second outer surface.

8. The camera lens for a vehicle according to any one of claims 1 to 3, wherein, The shortest distance between a virtual first straight line connecting the low point of the first groove in a first direction perpendicular to the optical axis and a virtual second straight line connecting the high point of the second groove in the first direction perpendicular to the optical axis is within 20% to 40% of the thickness of the flange.

9. A camera module, comprising: Multiple lenses, stacked from the object side toward the image side; and Spacers are respectively disposed on the outer circumference between adjacent lenses. Wherein, at least the first lens among the plurality of lenses includes: A first region, the first region having an effective diameter, the first region having a first surface on the object side and a second surface on the image side; and A flange portion is disposed around the first region and has a third surface extending outward from a first edge of the first surface and a fourth surface extending outward from a second edge of the second surface. This flange portion is an optically ineffective region. The flange portion includes: A plurality of first grooves, the plurality of first grooves being recessed from the third surface of the flange toward the fourth surface, and A plurality of second grooves are recessed from the fourth surface toward the third surface, and The spacer includes a first spacer and a second spacer. The first spacer faces the third surface of the flange and covers the plurality of first grooves, and the second spacer faces the fourth surface of the flange and covers the plurality of second grooves. Wherein, the first edge is the boundary point between the flange portion and the first surface. The second edge is the boundary point between the flange and the second surface. Wherein, the minimum distance between the first edge of the first region and the first groove closest to the first edge is greater than the pitch between the plurality of first grooves. Each of the plurality of first grooves has an annular shape with a different radius in the third surface and is arranged in a concentric circular shape. Each of the plurality of second grooves has an annular shape with a different radius in the fourth surface and is arranged in a concentric circular shape. The low point of each of the plurality of first grooves and the high point of each of the plurality of second grooves are arranged to be offset from each other.

10. The camera module according to claim 9, comprising a lens mount disposed outside the plurality of lenses. in, The lens mount is made of metal. The first lens is made of plastic. The plurality of lenses includes a second lens made of glass on the object side or image side of the first lens.

11. The camera module according to claim 9 or 10, wherein, The distance between the plurality of first grooves is less than the maximum width of each of the first grooves. Wherein, the distance between the plurality of second grooves is less than the maximum width of each of the second grooves, and Wherein, the minimum distance between the plurality of first grooves and the first edge of the first region is less than the minimum distance between the plurality of second grooves and the second edge of the first region.

12. The camera module according to claim 9 or 10, in, The first surface of the first lens is convex towards the object. Wherein, the second surface of the first lens is concave towards the object side; Each of the plurality of first grooves has a first outer surface adjacent to the flange and a first inner surface adjacent to the first region. The first inner surface and the first outer surface are inclined based on a straight line passing through the lowest point of the first groove and parallel to the optical axis. Each of the plurality of second grooves has a second outer surface adjacent to the flange and a second inner surface adjacent to the first region, and The second inner surface and the second outer surface are inclined based on a straight line passing through the high point of the second groove and parallel to the optical axis.

13. The camera module according to claim 9 or 10, in, The first spacer contacts the flange of the first lens and the flange of the lens disposed on the object side of the first lens, and The second spacer contacts the flange portion of the first lens and the flange portion of the lens arranged on the image side of the first lens.

14. The camera module according to claim 9 or 10, in, The depth of the first groove is in the range of 20% to 40% of the thickness of the flange portion of the first lens, and The depth of the second groove is in the range of 20% to 40% of the thickness of the flange portion of the first lens.

Images