Lens, camera module and electronic device

Abstract

The present disclosure relates to a lens, a camera module and an electronic device. The lens comprises a first lens group and a second lens group. The first lens group has positive refractive power, and comprises a first lens with positive refractive power and a second lens with refractive power. The first lens and the second lens are arranged along an optical axis, and the second lens is located on the image side of the first lens. The second lens group is located on the image side of the first lens group and arranged along the optical axis of the first lens group. The second lens group has negative refractive power, and comprises a third lens with negative refractive power and a fourth lens with positive refractive power. The third lens and the fourth lens are arranged along the optical axis, and the fourth lens is located on the image side of the third lens. The second lens group is movable along the optical axis. The first lens group with positive refractive power is conducive to improving the light collecting ability of the lens. The second lens group with negative refractive power is conducive to realizing continuous optical focusing at different object distances by adjusting the distance between the first lens group and the second lens group.

Description

Technical Field

[0001] This disclosure relates to the field of optical device technology, and in particular to a lens, camera module and electronic device. Background Technology

[0002] To meet the high-quality imaging requirements of electronic devices, camera modules typically incorporate multiple lens elements within their lenses. The commonly used technique involves moving the entire lens along the optical axis for focusing, which is not conducive to miniaturization of the camera module. Summary of the Invention

[0003] To overcome the problems existing in the related technologies, this disclosure provides a lens, a camera module, and an electronic device.

[0004] According to a first aspect of the present disclosure, a lens is provided, comprising:

[0005] A first lens group, the first lens group having positive optical power, the first lens group including a first lens having positive optical power and a second lens having optical power, the first lens and the second lens being arranged on the same optical axis, the second lens being located on the image side of the first lens;

[0006] The second lens group is located on the image side of the first lens group and is arranged on the same optical axis as the first lens group. The second lens group has negative optical power and includes a third lens with negative optical power and a fourth lens with positive optical power. The third lens and the fourth lens are arranged on the same optical axis, and the fourth lens is located on the image side of the third lens. The second lens group moves along the optical axis.

[0007] In some embodiments, the object-facing surface of the first lens is convex at the optical axis;

[0008] The object-side surface of the second lens is concave at the optical axis, and the image-side surface of the second lens is convex at the optical axis;

[0009] The surface of the third lens facing the object side is concave at the optical axis;

[0010] The surface of the fourth lens facing the object side is convex at the optical axis, and the surface of the fourth lens facing the image side is concave at the optical axis.

[0011] In some embodiments, the first lens group and the second lens group satisfy the following relationship:

[0012] 0.2<|R 11 / f max |<0.3

[0013] 0.2<|R 21 / fmax |<0.6

[0014] 0.1<|R 31 / f max |<0.3

[0015] 0.1<|R 41 / f max |<0.2

[0016] Among them, R 11 R is the radius of curvature of the surface of the first lens facing the object side at the optical axis. 21 R is the radius of curvature of the object-facing surface of the second lens at the optical axis. 31 R is the radius of curvature of the surface of the third lens facing the object side at the optical axis. 41 f is the radius of curvature of the surface of the fourth lens facing the object side at the optical axis. max This is the maximum focal length of the lens.

[0017] In some embodiments, the first lens group and the second lens group satisfy the following relationship:

[0018] 0.4 <R 21 / R 22 <1.1

[0019] 0.3 <R 41 / R 42 <0.7

[0020] Among them, R 21 R is the radius of curvature of the object-facing surface of the second lens at the optical axis. 22 R is the radius of curvature of the surface of the second lens facing the image side at the optical axis. 41 R is the radius of curvature of the surface of the fourth lens facing the object side at the optical axis. 42 The radius of curvature of the surface of the fourth lens facing the image side at the optical axis.

[0021] In some embodiments, the first lens group and the second lens group satisfy the following relationship:

[0022] 0.4 <f1 / f max <0.7

[0023] -0.4 <f3 / f max <-0.2

[0024] 0.3 <f4 / f max <0.5

[0025] Where f1 is the focal length of the first lens, f3 is the focal length of the third lens, f4 is the focal length of the fourth lens, and f max This is the maximum focal length of the lens.

[0026] In some embodiments, the first lens group and the second lens group satisfy the following relationship:

[0027] 0.3 <DL max / TTL<0.4

[0028] Among them, DL max TTL is the maximum distance on the optical axis between the object-side surface of the first lens and the image-side surface of the fourth lens, and TTL is the distance on the optical axis from the object-side surface of the first lens to the photosensitive element.

[0029] In some embodiments, the first lens group and the second lens group satisfy the following relationship:

[0030] 1 <TTL / f max <1.2

[0031] Where TTL is the distance from the object-facing surface of the first lens to the photosensitive element on the optical axis, f max This is the maximum focal length of the lens.

[0032] In some embodiments, the first lens group and the second lens group satisfy the following relationship:

[0033] 4 <TTL / ImgH<4.4

[0034] Wherein, TTL is the distance from the object-facing surface of the first lens to the photosensitive element on the optical axis, and ImgH is the image height corresponding to 1 / 2 of the maximum field of view of the lens.

[0035] In some embodiments, the first lens group and the second lens group satisfy the following relationship:

[0036] 0.2 <ImgH / f max <0.3

[0037] Where ImgH is the image height corresponding to the maximum field of view of the lens described in 1 / 2, and f max This is the maximum focal length of the lens.

[0038] In some embodiments, the first lens group and the second lens group satisfy the following relationship:

[0039] 1 <SD 42 / SD 41 <1.1

[0040] Among them, SD41 SD is the perpendicular aperture of the object-facing surface of the fourth lens at the optical axis. 42 The perpendicular aperture of the surface of the fourth lens facing the image side at the optical axis.

[0041] In some embodiments, the absolute value of the focal length of the second lens group is greater than the absolute value of the focal length of the first lens group.

[0042] In some embodiments, the first lens group and the second lens group satisfy the following relationship:

[0043] 0.5<|f 12 / f max |<0.8

[0044] 0.9<|f 34 / f max| <1.6

[0045] 1.5<|f 34 / f 12 |<2.3

[0046] Among them, f 12 f is the focal length of the first lens group. 34 f is the focal length of the second lens group. max This is the maximum focal length of the lens.

[0047] In some embodiments, the first lens group and the second lens group satisfy the following relationship:

[0048] 0.6 <CT 12 / ∑CT<0.8

[0049] 0.2 <CT 34 / ∑CT<0.4

[0050] 2 <CT 12 / CT 34 <2.7

[0051] Among them, CT 12 CT is the sum of the thicknesses of each lens in the first lens group along the optical axis. 34 ∑CT is the sum of the thicknesses of each lens in the second lens group along the optical axis. 12 With CT 34 sum.

[0052] In some embodiments, the first lens group and the second lens group satisfy the following relationship:

[0053] 2.3 <CT1 / CT2<2.8

[0054] 1.1 <CT4 / CT3<2.2

[0055] Wherein, CT1 is the thickness of the first lens on the optical axis, CT2 is the thickness of the second lens on the optical axis, CT3 is the thickness of the third lens on the optical axis, and CT4 is the thickness of the fourth lens on the optical axis.

[0056] In some embodiments, the first lens group and the second lens group satisfy the following relationship:

[0057] 0.9 <CT1 / (|SAGYS 11 |+|SAGYS 12 |)<1.8

[0058] 0.8 <CT4 / (|SAGYS 41 |+|SAGYS 42 |)<1.4

[0059] Wherein, CT1 is the thickness of the first lens on the optical axis, and SAGYS 11 CT4 is the maximum axial distance between the object-facing surface of the first lens and the vertex of that surface on the optical axis, and SAGYS is the thickness of the fourth lens on the optical axis. 14 The maximum axial distance between the surface of the fourth lens facing the object side and the vertex of that surface on the optical axis.

[0060] In some embodiments, the second lens group is moved along the optical axis to a macro-focus state or a telephoto state; and

[0061] The first lens group and the second lens group satisfy the following relationship:

[0062] 0.6 <Cz2-Cz1<1.2

[0063] Wherein, Cz2 is the distance between the second lens and the third lens on the optical axis in the macro state, and Cz1 is the distance between the second lens and the third lens on the optical axis in the telephoto state.

[0064] According to a second aspect of the present disclosure, a camera module is provided, comprising:

[0065] The lens described in any one of the first aspects above;

[0066] The prism is located on the image side of the second lens group;

[0067] A photosensitive element is located on the image side of the prism.

[0068] According to a third aspect of the present disclosure, an electronic device is provided, comprising:

[0069] The lens described in any one of the first aspects above; and / or

[0070] The camera module described in the second aspect above.

[0071] The technical solutions provided by the embodiments of this disclosure can include the following beneficial effects: the first lens group with positive optical power is beneficial for improving the light-gathering capability of the lens. The second lens group with negative optical power is beneficial for achieving continuous optical focusing at different object distances by adjusting the distance between the first and second lens groups. Furthermore, the first lens has positive refractive power, which is beneficial for the convergence of incident light in the object-side field of view; the second lens can be used to correct aberrations generated by the first lens; the third lens has negative refractive power, which is used to delay the angle between the light ray and the optical axis; and the fourth lens has positive refractive power, which is used to correct spherical aberration, coma, and astigmatism generated by the third lens. This, in turn, improves the imaging effect of the lens.

[0072] It should be understood that the above general description and the following detailed description are exemplary and explanatory only, and are not intended to limit this disclosure. Attached Figure Description

[0073] The accompanying drawings, which are incorporated in and form a part of this specification, illustrate embodiments consistent with this disclosure and, together with the description, serve to explain the principles of this disclosure.

[0074] Figure 1 This is a schematic diagram of the structure of a lens according to an exemplary embodiment.

[0075] Figure 2 This is a schematic diagram illustrating the structure of a camera module in a telephoto state according to an exemplary embodiment.

[0076] Figure 3 This is a spherical aberration curve of a camera module in a telephoto state, according to an exemplary embodiment.

[0077] Figure 4 This is a schematic diagram of the astigmatism of a camera module in a telephoto state according to an exemplary embodiment.

[0078] Figure 5 This is a distortion curve diagram of a camera module in a telephoto state according to an exemplary embodiment.

[0079] Figure 6 This is a schematic diagram illustrating the structure of a camera module in a macro mode according to an exemplary embodiment.

[0080] Figure 7 This is a spherical aberration curve of a camera module in macro mode, according to an exemplary embodiment.

[0081] Figure 8 This is a schematic diagram of the astigmatism field curvature of a camera module in macro mode according to an exemplary embodiment.

[0082] Figure 9 This is a distortion curve diagram of a camera module in macro mode according to an exemplary embodiment.

[0083] Figure 10 This is a block diagram illustrating an electronic device according to an exemplary embodiment. Detailed Implementation

[0084] Exemplary embodiments will now be described in detail, examples of which are illustrated in the accompanying drawings. When the following description relates to the drawings, unless otherwise indicated, the same numerals in different drawings denote the same or similar elements. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with this disclosure. Rather, they are merely examples of apparatuses and methods consistent with some aspects of this disclosure as detailed in the appended claims.

[0085] To meet the high-quality imaging requirements of electronic devices, camera modules typically incorporate multiple lens elements within their lenses. A common technique for focusing is to move the entire lens along the optical axis, meaning the lens, driven by a motor, achieves focusing at different object distances. During focusing, the height of the camera module—its height along the optical axis—changes, hindering miniaturization. Furthermore, this height variation along the optical axis causes image distortion, negatively impacting image quality.

[0086] To address the aforementioned technical problems, this disclosure provides a lens, a camera module, and an electronic device. The lens includes a first lens group and a second lens group, each containing multiple lenses. By configuring the multiple lenses in the first lens group, the first lens group achieves positive optical power. By configuring the multiple lenses in the second lens group, the second lens group achieves negative optical power. Focusing can then be achieved by driving the second lens group.

[0087] Figure 1 This is a schematic diagram illustrating the structure of a lens according to an exemplary embodiment. For example... Figure 1As shown, the lens includes a first lens group 100 and a second lens group 20. The first lens group 100 has positive optical power and includes a first lens 10 with positive optical power and a second lens 20 with positive optical power. The first lens 10 and the second lens 20 are arranged coaxially with an optical axis 300, and the second lens 20 is located on the image side of the first lens 10. The second lens group 200 is located on the image side of the first lens group 100 and is arranged coaxially with an optical axis 300. The second lens group 200 has negative optical power and includes a third lens 30 with negative optical power and a fourth lens 40 with positive optical power. The third lens 30 and the fourth lens 40 are arranged coaxially with an optical axis 300, and the fourth lens 40 is located on the image side of the third lens 30. The second lens group 200 can move along the optical axis 300.

[0088] A first lens group 100 with positive optical power and a second lens group 200 with negative optical power are arranged along the optical axis 300. The first lens group 100 with positive optical power is beneficial for improving the light-gathering capability of the lens. The second lens group 200 with negative optical power is beneficial for achieving continuous optical focusing at different object distances by adjusting the distance between the first lens group 100 and the second lens group 200. The second lens group 200 moves along the optical axis 300 to change the focal point position, thereby achieving focusing of the lens on the photosensitive element 70 at different object distances. That is, during the focusing process of the second lens group 200 moving along the optical axis 300, the distance between the first lens group 100 and the photosensitive element 70 remains unchanged. This means that the height of the camera module adapted to the lens in the direction of the optical axis 300 does not change with focusing, which is beneficial for the miniaturization of the camera module and the improvement of imaging effect.

[0089] Light rays from the object on the lens side pass sequentially through the first lens group 100 and the second lens group 200 before entering the image sensor 70 for imaging. Specifically, light rays from the object on the lens side pass sequentially through the first lens 10, the second lens 20, the third lens 30, and the fourth lens 40 before entering the image sensor 70. The first lens group 100 possesses positive optical power through the first lens 10 and the second lens 20, both having positive optical power. The first lens 10, having positive optical power, has positive refractive power, which facilitates the convergence of incident light rays within the object-side field of view. The second lens 20, having positive optical power, corrects aberrations produced by the first lens 10. The second lens group 200 possesses negative optical power through the third lens 30, having negative optical power, and the fourth lens 40, having positive optical power. The third lens 30, with negative optical power (i.e., negative refractive power), is used to delay the angle between the light ray and the optical axis 300. The fourth lens 40, with positive optical power (i.e., positive refractive power), is used to correct spherical aberration, coma, and astigmatism produced by the third lens 30.

[0090] In this embodiment, the object-side surface 11 of the first lens 10 is convex at the optical axis 300 to improve the ability of the first lens 10 to converge incident light within the object-side field of view. The object-side surface 21 of the second lens 20 is concave at the optical axis 300, and the image-side surface 22 of the second lens 20 is convex at the optical axis 300 to improve the ability of the second lens 20 to correct aberrations generated by the first lens 10. The object-side surface 31 of the third lens 30 is concave at the optical axis 300, which helps to delay the angle of light rays incident from the object side into the photosensitive element 70. The object-side surface 41 of the fourth lens 40 is convex at the optical axis 300, and the image-side surface 42 of the fourth lens 40 is concave at the optical axis 300, which helps to correct spherical aberration, coma, and astigmatism generated by the third lens 30.

[0091] In this embodiment of the disclosure, the first lens group 100 and the second lens group 200 satisfy the following relationship:

[0092] 0.2<|R 11 / f max |<0.3

[0093] 0.2<|R 21 / f max |<0.6

[0094] 0.1<|R 31 / f max |<0.3

[0095] 0.1<|R 41 / fmax |<0.2

[0096] Among them, R 11 R is the radius of curvature of the surface 11 of the first lens 10 facing the object side at optical axis 30°. 21 R is the radius of curvature of the surface 21 of the second lens 20 facing the object side at the optical axis 300. 31 R is the radius of curvature of the surface 31 of the third lens 30 facing the object side at the optical axis 300. 41 f is the radius of curvature of the surface 41 of the fourth lens 40 facing the object side at the optical axis 300. max This is the maximum focal length of the lens.

[0097] The maximum focal length of the lens, i.e., the maximum focal length that the lens can produce within the range of motion of the second lens group 200, is determined by two factors: focal point and radius of curvature. By setting the radius of curvature of each lens, a reasonable distribution of optical power can be achieved, improving the lens's light-gathering ability and simultaneously helping to reduce the overall size of the lens.

[0098] In this embodiment of the disclosure, the first lens group 100 and the second lens group 200 satisfy the following relationship:

[0099] 0.4 <R 21 / R 22 <1.1

[0100] 0.3 <R 41 / R 42 <0.7

[0101] Among them, R 21 R is the radius of curvature of the surface 21 of the second lens 20 facing the object side at the optical axis 300. 22 R is the radius of curvature of the image-side surface 22 of the second lens 20 at the optical axis 30°. 41 R is the radius of curvature of the surface 41 of the fourth lens 40 facing the object side at the optical axis 300. 42 The radius of curvature of the surface 42 of the fourth lens 40 facing the image side at optical axis 300.

[0102] When the above formula is satisfied, the radii of curvature of the second lens 20 and the fourth lens 40 are within a reasonable range. This avoids poor forming caused by excessive bending of the object side due to an excessively small radius of curvature, thereby improving the manufacturing yield of the lens. It also avoids an excessively large radius of curvature, which would result in a smooth lens surface, making aberration correction difficult and causing relatively low brightness in the edge field of view, thus affecting the image quality of the lens.

[0103] By rationally allocating the curvature radius of each lens, the feasibility of manufacturing each lens can be ensured, while effectively correcting spherical aberration and astigmatism of the lens and improving the image quality of the lens.

[0104] In this embodiment of the disclosure, the first lens group 100 and the second lens group 200 satisfy the following relationship:

[0105] 0.4 <f1 / f max <0.7

[0106] -0.4 <f3 / f max <-0.2

[0107] 0.3 <f4 / f max <0.5

[0108] Where f1 is the focal length of the first lens 10, f3 is the focal length of the third lens 30, f4 is the focal length of the fourth lens 40, and f max This is the maximum focal length of the lens.

[0109] When the above formula is satisfied, the refractive power of each lens is properly distributed, the surface shape can be flexibly changed, a larger aperture can be supported, and it is beneficial to converge the light incident from the object side into the photosensitive element 70. A reasonable distribution of refractive power helps to reduce the overall spherical aberration, chromatic aberration, and distortion of the first lens group 100 to a reasonable level, reducing the design difficulty of the second lens group 200. Furthermore, a reasonable configuration of the lens refractive power can balance the large spherical aberration generated by the first lens group 100, improve the overall resolving power of the optical lens, and enhance the correction of peripheral aberrations in the image.

[0110] In some embodiments, the lens further includes an aperture stop 80. The aperture stop 80 is located on the object side of the first lens 10.

[0111] In this embodiment of the disclosure, the first lens group 100 and the second lens group 200 satisfy the following relationship:

[0112] 0.3 <DL max / TTL<0.4

[0113] Among them, DL max The distance on the optical axis 300 is the maximum distance between the object-side surface 11 of the first lens 10 and the image-side surface 42 of the fourth lens 40. TTL is the distance on the optical axis 300 from the object-side surface 11 of the first lens 10 to the photosensitive element 70. Through a reasonable structural layout, the lens achieves a large aperture and long focal length while increasing the space between the image-side surface of the fourth lens 40 and the photosensitive element 70, which is beneficial to the structural layout of the camera module.

[0114] In this embodiment of the disclosure, the first lens group 100 and the second lens group 200 satisfy the following relationship:

[0115] 1 <TTL / f max <1.2

[0116] Wherein, TTL is the distance from the object-side surface 11 of the first lens 10 to the photosensitive element 70 on the optical axis 300, f max This is the maximum focal length of the lens. It allows for the maintenance of high image quality while achieving lens miniaturization.

[0117] In this embodiment of the disclosure, the first lens group 100 and the second lens group 200 satisfy the following relationship:

[0118] 4 <TTL / ImgH<4.4

[0119] Where TTL is the distance from the object-side surface 11 of the first lens 10 to the photosensitive element 70 along the optical axis 300, and ImgH is the image height corresponding to the maximum field of view of the 1 / 2 lens. This helps to reduce the overall size of the lens, thereby saving space occupied by the camera module.

[0120] In this embodiment of the disclosure, the first lens group 100 and the second lens group 200 satisfy the following relationship:

[0121] 0.2 <ImgH / f max <0.3

[0122] Where ImgH is the image height corresponding to the maximum field of view of the 1 / 2 lens, f max This is the maximum focal length of the lens.

[0123] When the above formula is satisfied, the ratio of lens height to image plane is within a small range, allowing for lens miniaturization through a reasonable structural layout. Furthermore, when Imgh / f < 1, long-distance shooting is possible, where f is the effective focal length of the lens.

[0124] In this embodiment of the disclosure, the first lens group 100 and the second lens group 200 satisfy the following relationship:

[0125] 1 <SD 42 / SD 41 <1.1

[0126] Among them, SD 41 The perpendicular aperture of the fourth lens 40's object-side surface 41 at optical axis 300 is SD. 42 The perpendicular aperture of the fourth lens 40 at optical axis 300 is the surface 42 facing the image side.

[0127] When the above formula is satisfied, the aperture size of the fourth lens 40 is reasonably set, which can reduce the exit angle of the incident light, suppress astigmatism and field curvature, and at the same time ensure the reasonable structural size of the fourth lens 40, which is conducive to achieving a compact lens structure.

[0128] In this embodiment of the present disclosure, the absolute value of the focal length of the second lens group 200 is greater than the absolute value of the focal length of the first lens group 100, which helps to shorten the movement distance when the second lens group 200 is focusing, and is conducive to achieving a compact lens structure.

[0129] In this embodiment of the disclosure, the first lens group 100 and the second lens group 200 satisfy the following relationship:

[0130] 0.5<|f 12 / f max |<0.8

[0131] 0.9<|f 34 / f max| <1.6

[0132] 1.5<|f 34 / f 12 |<2.3

[0133] Among them, f 12 f is the focal length of the first lens group 100. 34 The focal length of the second lens group is 200, f max This is the maximum focal length of the lens.

[0134] When the above formula is satisfied, that is, the refractive power of the first lens group 100 and the second lens group 200 is reasonably configured, the large spherical aberration generated by the first lens group 100 can be avoided, and the overall resolving power of the optical lens can be improved. It is also conducive to the compression of the distance between the first lens group 100 and the second lens group 200 at different object distances, which helps to form a focusing mode with a short stroke.

[0135] In this embodiment of the disclosure, the first lens group 100 and the second lens group 200 satisfy the following relationship:

[0136] 0.6 <CT 12 / ∑CT<0.8

[0137] 0.2 <CT 34 / ∑CT<0.4

[0138] 2 <CT 12 / CT 34 <2.7

[0139] Among them, CT 12 The sum of the thicknesses of each lens in the first lens group 100 along the optical axis 300, CT 34 ∑CT is the sum of the thicknesses of each lens in the second lens group 200 along the optical axis 300, where ∑CT is CT. 12 With CT 34 sum.

[0140] When the above formula is satisfied, that is, the structural dimensions of the first lens group 100 and the second lens group 200 are reasonably allocated, which improves the degree of correction of various aberrations of the lens and the light convergence, and is conducive to improving the overall resolution of the lens.

[0141] In this embodiment of the disclosure, the first lens group 100 and the second lens group 200 satisfy the following relationship:

[0142] 2.3 <CT1 / CT2<2.8

[0143] 1.1 <CT4 / CT3<2.2

[0144] Wherein, CT1 is the thickness of the first lens 10 on the optical axis 300, CT2 is the thickness of the second lens 20 on the optical axis 300, CT3 is the thickness of the third lens 30 on the optical axis 300, and CT4 is the thickness of the fourth lens 40 on the optical axis 300.

[0145] When the above formula is met, the space of the lens can be effectively utilized, and it is helpful for the manufacturing and assembly of the lens, reducing sensitivity and improving the production yield.

[0146] In this embodiment of the disclosure, the first lens group 100 and the second lens group 200 satisfy the following relationship:

[0147] 0.9 <CT1 / (|SAGYS 11 |+|SAGYS 12 |)<1.8

[0148] 0.8 <CT4 / (|SAGYS 41 |+|SAGYS 42 |)<1.4

[0149] Wherein, CT1 is the thickness of the first lens 10 on the optical axis 300, SAGYS 11 CT4 is the maximum axial distance of the surface 11 of the first lens 10 facing the object side at the vertex of the optical axis 300, and CT4 is the thickness of the fourth lens 40 on the optical axis 300. 14 The maximum axial distance of the fourth lens 40's surface 41 facing the object side at the vertex of the optical axis 300 is given by the fourth lens 40.

[0150] When the above formula is satisfied, the ratio of the effective aperture height to the center thickness of both the first lens 10 and the fourth lens 40 is within a reasonable range. This facilitates the convergence of incident light rays within the field of view by the first lens 10 and the fourth lens 40, allows for reasonable control of the refractive power and thickness of the lenses in the vertical direction, avoids lenses that are too thin or too thick, benefits lens manufacturing, reduces the angle of incidence of light on the image plane, and lowers lens sensitivity. Furthermore, it helps the fourth lens 40 correct the distortion and field curvature generated by the first lens group 100, resulting in a more uniform refractive power distribution of the fourth lens 40 near the imaging plane.

[0151] In this embodiment, the second lens group 200 moves along the optical axis 300 to either a macro-end state or a telephoto-end state. The macro-end state corresponds to usage scenarios with a relatively short object distance, while the telephoto-end state corresponds to usage scenarios with a relatively long object distance. Furthermore, the first lens group 100 and the second lens group 200 satisfy the following relationship:

[0152] 0.6 <Cz2-Cz1<1.2

[0153] Wherein, Cz2 is the distance between the second lens 20 and the third lens 30 on the optical axis 300 in the macro state, and Cz1 is the distance between the second lens 20 and the third lens 30 on the optical axis 300 in the telephoto state.

[0154] The distance between the second lens 20 and the third lens 30 on the optical axis 300 is the distance between the first lens group 100 and the second lens group 200 on the optical axis 300. By moving the second lens group 200, the overall height of the lens remains constant during focusing, thereby achieving internal focusing. Furthermore, the second lens group 200 has a small travel distance, which helps to reduce the overall size of the lens.

[0155] Based on the same concept, this disclosure also provides a camera module. Figure 2 This is a schematic diagram illustrating the structure of a camera module in a telephoto state according to an exemplary embodiment. Figure 6 This is a schematic diagram illustrating the structure of a camera module in a macro mode according to an exemplary embodiment.

[0156] To further describe the camera module of this disclosure, several specific embodiments will be listed below.

[0157] In one embodiment, such as Figure 2 and Figure 6 As shown, the camera module includes the lens described in any of the above embodiments. A prism 50 is located on the image side of the second lens group 200. A photosensitive element 70 is located on the image side of the prism 50. The prism 50 is an image-rotating prism 50 used to change the angle of light rays exiting the lens and direct the light rays into the photosensitive element 70 for imaging. The miniaturization of the camera module is achieved by using the prism 50.

[0158] In some embodiments, the camera module further includes a filter element 60. The filter element 60 is located between the prism 50 and the photosensitive element 70. The filter element 60 may include, but is not limited to, a low-pass filter, an infrared cut-off filter, a microlens, or an RGB color filter.

[0159] The parameters of the camera module in this embodiment can be found in Tables 1-1 to 1-4.

[0160] Table 1-1

[0161]

[0162] In this embodiment, the reference wavelength is 555.0 nm. The meanings of the letters in Table 1-1 are as follows: object represents the side of the object, stop represents the aperture 80, lens1 represents the first lens 10, lens2 represents the second lens 20, lens3 represents the third lens 30, lens4 represents the fourth lens 40, prism represents the prism 50, IR represents the filter element 60, ImgH represents the photosensitive element 70, and infinity represents infinity.

[0163] Table 1-2

[0164]

[0165] In Table 1-2, the surface numbers correspond to the surface numbers in Table 1-1. The meanings of each letter in Table 1-2 are as follows: K represents the cone coefficient in the equation of the aspheric curve, and A4 to A30 represent the fourth, sixth, eighth, tenth... thirtieth order aspheric coefficients, respectively.

[0166] Table 1-3

[0167]

[0168] The meanings of the letters in Table 1-3 are as follows: Variable distances A, B, and C correspond to A, B, and C under the thickness in Table 1-1, respectively; z1 represents the telephoto end state; z2 represents the macro end state; and MICRO represents macro.

[0169] Table 1-4

[0170] Z1 Z2 TTL 13.8 13.8 ImgH 3.27 3.27 EFL 12.8 11.7 FOV 28.2 27.3 FNO 2.45 2.25 Object distance infinity 150 DL 4.61 5.25 fmax 12.8 CT S6(B) 0.22 0.87 DLmax 5.25 F12 7.595309258 F34 -11.88900007 |SAGYS11| 1.21202218 |SAGYS12| 0.17714327 |SAGYS21| 0.0451844 |SAGYS22| 0.03749722 |SAGYS31| 0.09273021 |SAGYS32| 0.33486327 |SAGYS41| 0.36053178 |SAGYS42| 0.12899568

[0171] The meanings of the letters in Table 1-4 are as follows: TTL represents the distance on the optical axis 300 from the object-side surface 11 of the first lens 10 to the photosensitive element 70; ImgH represents the image height corresponding to the maximum field of view of the 1 / 2 lens; EFL represents the focal length; FOV represents the field of view; DL represents the distance on the optical axis 300 between the object-side surface 11 of the first lens 10 and the image-side surface 42 of the fourth lens 40; fmax represents the maximum focal length of the lens; F12 represents the focal length of the first lens group 100; F34 represents the focal length of the second lens group 200; |SAGYS11| represents the maximum axial distance on the object-side surface 11 of the first lens 10 at the vertex of the optical axis 300; |SAGYS12| represents the maximum axial distance on the image-side surface 12 of the first lens 10 at the vertex of the optical axis 300. |SAGYS21| represents the maximum axial distance of the object-side surface 21 of the second lens 20 at the vertex of the optical axis 300; |SAGYS22| represents the maximum axial distance of the image-side surface 22 of the second lens 20 at the vertex of the optical axis 300; |SAGYS31| represents the maximum axial distance of the object-side surface 31 of the third lens 30 at the vertex of the optical axis 300; |SAGYS32| represents the maximum axial distance of the image-side surface 32 of the third lens 30 at the vertex of the optical axis 300; |SAGYS41| represents the maximum axial distance of the object-side surface 41 of the fourth lens 40 at the vertex of the optical axis 300; |SAGYS42| represents the maximum axial distance of the image-side surface 42 of the fourth lens 40 at the vertex of the optical axis 300.

[0172] Figure 3 This is a spherical aberration curve of a camera module in a telephoto state, according to an exemplary embodiment. Figure 4 This is a schematic diagram of the astigmatism of a camera module in a telephoto state according to an exemplary embodiment. Figure 5 This is a distortion curve diagram of a camera module in a telephoto state according to an exemplary embodiment. Figure 7 This is a spherical aberration curve of a camera module in macro mode, according to an exemplary embodiment. Figure 8 This is a schematic diagram of the astigmatism field curvature of a camera module in macro mode according to an exemplary embodiment. Figure 9 This is a distortion curve diagram of a camera module in macro mode according to an exemplary embodiment. Figure 3 and Figure 7 In the diagram, curves L1 to L6 represent spherical aberration curves at wavelengths of 435nm, 470nm, 510nm, 555nm, 610nm, and 650nm, respectively. Figure 4 and Figure 8In the diagram, S1 and T1 represent the astigmatism curvature at a wavelength of 435 nm, S2 and T2 represent the astigmatism curvature at a wavelength of 470 nm, S3 and T3 represent the astigmatism curvature at a wavelength of 510 nm, S4 and T4 represent the astigmatism curvature at a wavelength of 555 nm, S5 and T5 represent the astigmatism curvature at a wavelength of 610 nm, and S6 and T6 represent the astigmatism curvature at a wavelength of 650 nm. It can be seen that this embodiment has good imaging performance, with spherical aberration, field curvature, and distortion within a suitable range.

[0173] In one embodiment, the parameters of the camera module can be found in Tables 2-1 to 2-4. The meanings of the letters in Tables 2-1 to 2-4 are the same as those in Tables 1-1 to 1-4, and will not be repeated here.

[0174] Table 2-1

[0175]

[0176] Table 2-2

[0177]

[0178] Table 2-3

[0179]

[0180] Table 2-4

[0181] Z1 Z2 TTL 13.77 13.77 ImgH 3.27 3.27 EFL 12.6 11.6 FOV 28.6 27.7 FNO 2.48 2.26 Object distance infinity 150 DL 4.73 5.37 fmax 12.6 CT S6(B) 0.28 0.92 DLmax 5.37 F12 7.541644776 F34 -12.50056422 |SAGYS11| 1.01256279 |SAGYS12| 0.00774464 |SAGYS21| 0.04723488 |SAGYS22| 0.05939656 |SAGYS31| 0.14022083 |SAGYS32| 0.40556119 |SAGYS41| 0.42282909 |SAGYS42| 0.07985341

[0182] In one embodiment, the parameters of the camera module can be found in Tables 3-1 to 3-4. The meanings of the letters in Tables 3-1 to 3-4 are the same as those in Tables 1-1 to 1-4, and will not be repeated here.

[0183] Table 3-1

[0184]

[0185] Table 3-2

[0186]

[0187] Table 3-3

[0188]

[0189] Table 3-4

[0190] Z1 Z2 TTL 14.2 14.2 ImgH 3.27 3.27 EFL 13.2 12.1 FOV 27.3 26.5 FNO 2.45 2.24 Object distance infinity 150 DL 4.74 5.50 fmax 13.2 CT S6(B) 0.27 1.02 DLmax 5.50 F12 8.098795661 F34 -13.00000057 |SAGYS11| 1.28056874 |SAGYS12| 0.25681977 |SAGYS21| 0.04861168 |SAGYS22| 0.0178176 |SAGYS31| 0.06304517 |SAGYS32| 0.30817364 |SAGYS41| 0.32433566 |SAGYS42| 0.14628207

[0191] In one embodiment, the parameters of the camera module can be found in Tables 4-1 to 4-4. The meanings of the letters in Tables 4-1 to 4-4 are the same as those in Tables 1-1 to 1-4, and will not be repeated here.

[0192] 4-1

[0193]

[0194] 4-2

[0195]

[0196] 4-3

[0197]

[0198] 4-4

[0199] Z1 Z2 TTL 13.78 13.78 ImgH 3.27 3.27 EFL 12.84 11.75 FOV 28.1 27.2 FNO 2.45 2.25 Object distance infinity 150 DL 4.44 5.22 fmax 12.84 CT S6(B) 0.15 0.94 DLmax 5.22 F12 8.081828589 F34 -13.49962053 |SAGYSll| 1.24610915 |SAGYS12| 0.25086275 |SAGYS21| 0.07040943 |SAGYS22| 0.01057582 |SAGYS31| 0.06883469 |SAGYS32| 0.20635968 |SAGYS41| 0.31954724 |SAGYS42| 0.22778992

[0200] In one embodiment, the parameters of the camera module can be found in Tables 5-1 to 5-4. The meanings of the letters in Tables 5-1 to 5-4 are the same as those in Tables 1-1 to 1-4, and will not be repeated here.

[0201] Table 5-1

[0202]

[0203] Table 5-2

[0204]

[0205] Table 5-3

[0206]

[0207] Table 5-4

[0208] Z1 Z2 TTL 13.93 13.93 ImgH 3.27 3.27 EFL 12.6 11.67 FOV 28.6 27.6 FNO 2.45 2.27 Object distance infinity 150 DL 4.54 5.32 fmax 12.6 CT S6(B) 0.30 1.09 DLmax 5.32 F12 8.060941186 F34 -15.50000026 |SAGYS11| 1.05769806 |SAGYS12| 0.04463945 |SAGYS21| 0.07728926 |SAGYS22| 0.04893438 |SAGYS31| 0.20126793 |SAGYS32| 0.26571698 |SAGYS41| 0.41182688 |SAGYS42| 0.12760352

[0209] In one embodiment, the parameters of the camera module can be found in Tables 6-1 to 6-4. The meanings of the letters in Tables 6-1 to 6-4 are the same as those in Tables 1-1 to 1-4, and will not be repeated here.

[0210] Table 6-1

[0211]

[0212] Table 6-2

[0213]

[0214] Table 6-3

[0215]

[0216] Table 6-4

[0217] Z1 Z2 TTL 13.95 13.95 ImgH 3.27 3.27 EFL 12.6 11.68 FOV 28.55 27.6 FNO 2.45 2.26 Object distance infinity 150 DL 4.43 5.08 fmax 12.6 CT S6(B) 0.22 0.87 DLmax 5.08 F12 8.14279672 F34 -15.99999965 |SAGYS11| 1.0767724 |SAGYS12| 0.06087121 |SAGYS21| 0.08326489 |SAGYS22| 0.0488126 |SAGYS31| 0.19901131 |SAGYS32| 0.26584173 |SAGYS41| 0.41307758 |SAGYS42| 0.12631849

[0218] In one embodiment, the parameters of the camera module can be found in Tables 7-1 to 7-4. The meanings of the letters in Tables 7-1 to 7-4 are the same as those in Tables 1-1 to 1-4, and will not be repeated here.

[0219] Table 7-1

[0220]

[0221] Table 7-2

[0222]

[0223] Table 7-3

[0224]

[0225] Table 7-4

[0226] Z1 Z2 TTL 13.82 13.82 ImgH 3.27 3.27 EFL 12.6 11.7 FOV 28.7 27.7 FNO 3 2.88 Object distance infinity 150 DL 3.93 4.58 fmax 12.6 CT S6(B) 0.22 0.87 DLmax 4.58 F12 8.214036338 F34 -17.00033279 |SAGYS11| 0.72587018 |SAGYS12| 0.03745276 |SAGYS21| 0.09952417 |SAGYS22| 0.02606372 |SAGYS31| 0.19528609 |SAGYS32| 0.15479161 |SAGYS41| 0.33848498 |SAGYS42| 0.12153319

[0227] In one embodiment, the parameters of the camera module can be found in Tables 8-1 to 8-4. The meanings of the letters in Tables 8-1 to 8-4 are the same as those in Tables 1-1 to 1-4, and will not be repeated here.

[0228] Table 8-1

[0229]

[0230] Table 8-2

[0231]

[0232] Table 8-3

[0233]

[0234] Table 8-4

[0235] Z1 Z2 TTL 13.73 13.73 ImgH 3.27 3.27 EFL 12.64 11.7 FOV 28.44 27.52 FNO 3 2.26 Object distance infinity 150 DL 4.18 5.32 fmax 12.64 CT S6(B) 0.10 1.24 DLmax 5.32 F12 8.94785421 F34 -19.99999612 |SAGYS11| 0.76350285 |SAGYS12| 0.09536133 |SAGYS21| 0.09687701 |SAGYS22| 0.07121942 |SAGYS31| 0.03118212 |SAGYS32| 0.33646438 |SAGYS41| 0.38800518 |SAGYS42| 0.13227673

[0236] In one embodiment, the parameters of the camera module can be found in Tables 9-1 to 9-4. The meanings of the letters in Tables 9-1 to 9-4 are the same as those in Tables 1-1 to 1-4, and will not be repeated here.

[0237] Table 9-1

[0238]

[0239] Table 9-2

[0240]

[0241] Table 9-3

[0242]

[0243] Table 9-4

[0244] Z1 Z2 TTL 13.7 13.7 ImgH 3.27 3.27 EFL 12.79 11.8 FOV 28.15 27.2 FNO 3 2.25 Object distance infinity 150 DL 4.25 5.29 fmax 12.79 CT S6(B) 0.11 1.16 DLmax 5.29 F12 8.802234855 F34 -17.96466662 |SAGYS11| 0.77914165 |SAGYS12| 0.09368448 |SAGYS21| 0.07762102 |SAGYS22| 0.08681587 |SAGYS31| 0.02962218 |SAGYS32| 0.34186872 |SAGYS41| 0.39932965 |SAGYS42| 0.1561588

[0245] In one embodiment, the parameters of the camera module can be found in Tables 10-1 to 10-4. The meanings of the letters in Tables 10-1 to 10-4 are the same as those in Tables 1-1 to 1-4, and will not be repeated here.

[0246] Table 10-1

[0247]

[0248] Table 10-2

[0249]

[0250] Table 10-3

[0251]

[0252] Table 10-4

[0253] Z1 Z2 TTL 13.72 13.72 ImgH 3.27 3.27 EFL 12.65 11.6 FOV 28.45 27.6 FNO 2.8 2.25 Object distance infinity 150 DL 4.38 5.27 fmax 12.65 CT S6(B) 0.17 1.07 DLmax 5.27 F12 8.329083351 F34 -15.49999972 |SAGYS11| 1.206534 |SAGYS12| 0.20213873 |SAGYS21| 0.03669476 |SAGYS22| 0.07625314 |SAGYS31| 0.04117908 |SAGYS32| 0.33088411 |SAGYS41| 0.40211344 |SAGYS42| 0.17764949

[0254] Based on the same concept, this disclosure also provides an electronic device, including the lens described in any of the foregoing embodiments and / or the camera module described in any of the foregoing embodiments.

[0255] Figure 10 This is a block diagram illustrating an electronic device 800 according to an exemplary embodiment. The electronic device 800 involved in this disclosure may also be referred to as a terminal device, user equipment (UE), mobile station (MS), mobile terminal (MT), etc., and is a device that provides voice and / or data connectivity to a user.

[0256] For example, electronic device 800 can be a handheld device or in-vehicle device with wireless connectivity. For example, electronic device 800 can be a mobile phone, computer, digital broadcasting terminal, messaging device, game console, tablet device, medical device, fitness equipment, personal digital assistant, etc.

[0257] Reference Figure 10The electronic device 800 may include one or more of the following components: processing component 802, memory 804, power component 806, multimedia component 808, audio component 810, input / output (I / O) interface 812, sensor component 814, and communication component 816.

[0258] Processing component 802 typically controls the overall operation of electronic device 800, such as operations associated with display, telephone calls, data communication, camera operation, and recording operations. Processing component 802 may include one or more processors 820 to execute instructions to complete all or part of the steps of the methods described above. Furthermore, processing component 802 may include one or more modules to facilitate interaction between processing component 802 and other components. For example, processing component 802 may include a multimedia module to facilitate interaction between multimedia component 808 and processing component 802.

[0259] Memory 804 is configured to store various types of data to support the operation of electronic device 800. Examples of this data include instructions for any application or method operating on electronic device 800, contact data, phonebook data, messages, pictures, videos, etc. Memory 804 can be implemented by any type of volatile or non-volatile storage device or a combination thereof, such as static random access memory (SRAM), electrically erasable programmable read-only memory (EEPROM), erasable programmable read-only memory (EPROM), programmable read-only memory (PROM), read-only memory (ROM), magnetic storage, flash memory, magnetic disk, or optical disk.

[0260] Power component 806 provides power to various components of electronic device 800. Power component 806 may include a power management system, one or more power supplies, and other components associated with generating, managing, and distributing power to electronic device 800.

[0261] Multimedia component 808 includes a screen that provides an output interface between the electronic device 800 and the user. In some embodiments, the screen may include a liquid crystal display (LCD) and a touch panel (TP). If the screen includes a touch panel, the screen may be implemented as a touchscreen to receive input signals from the user. The touch panel includes one or more touch sensors to sense touches, swipes, and gestures on the touch panel. The touch sensors may sense not only the boundaries of the touch or swipe action but also the duration and pressure associated with the touch or swipe operation. In some embodiments, multimedia component 808 includes a front-facing camera and / or a rear-facing camera. When the electronic device 800 is in an operating mode, such as a shooting mode or a video mode, the front-facing camera and / or the rear-facing camera may receive external multimedia data. Each front-facing camera and rear-facing camera may be a fixed optical lens system or have focal length and optical zoom capabilities.

[0262] Audio component 810 is configured to output and / or input audio signals. For example, audio component 810 includes a microphone (MIC) configured to receive external audio signals when electronic device 800 is in an operating mode, such as call mode, recording mode, and voice recognition mode. The received audio signals may be further stored in memory 804 or transmitted via communication component 816. In some embodiments, audio component 810 also includes a speaker for outputting audio signals.

[0263] I / O interface 812 provides an interface between processing component 802 and peripheral interface modules, such as keyboards, click wheels, buttons, etc. These buttons may include, but are not limited to, home buttons, volume buttons, power buttons, and lock buttons.

[0264] Sensor assembly 814 includes one or more sensors for providing state assessments of various aspects of electronic device 800. For example, sensor assembly 814 can detect the on / off state of electronic device 800, the relative positioning of components such as the display and keypad of electronic device 800, changes in position of electronic device 800 or a component of electronic device 800, the presence or absence of user contact with electronic device 800, orientation or acceleration / deceleration of electronic device 800, and temperature changes of electronic device 800. Sensor assembly 814 may include a proximity sensor configured to detect the presence of nearby objects without any physical contact. Sensor assembly 814 may also include a light sensor, such as a CMOS or CCD image sensor, for use in imaging applications. In some embodiments, sensor assembly 814 may also include an accelerometer, gyroscope, magnetometer, pressure sensor, or temperature sensor.

[0265] Communication component 816 is configured to facilitate wired or wireless communication between electronic device 800 and other devices. Electronic device 800 can access wireless networks based on communication standards, such as WiFi, 2G, or 3G, or combinations thereof. In one exemplary embodiment, communication component 816 receives broadcast signals or broadcast-related information from an external broadcast management system via a broadcast channel. In one exemplary embodiment, communication component 816 also includes a near-field communication (NFC) module to facilitate short-range communication. For example, the NFC module may be implemented based on radio frequency identification (RFID) technology, Infrared Data Association (IrDA) technology, ultra-wideband (UWB) technology, Bluetooth (BT) technology, and other technologies.

[0266] In an exemplary embodiment, the electronic device 800 may be implemented by one or more application-specific integrated circuits (ASICs), digital signal processors (DSPs), digital signal processing devices (DSPDs), programmable logic devices (PLDs), field-programmable gate arrays (FPGAs), controllers, microcontrollers, microprocessors, or other electronic components to perform the methods described above.

[0267] In an exemplary embodiment, a non-transitory computer-readable storage medium including instructions is also provided, such as a memory 804 including instructions, which can be executed by a processor 820 of an electronic device 800 to perform the above-described method. For example, the non-transitory computer-readable storage medium may be a ROM, random access memory (RAM), CD-ROM, magnetic tape, floppy disk, and optical data storage device, etc.

[0268] It is understood that in this disclosure, "multiple" refers to two or more, and other quantifiers are similar. "And / or" describes the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A alone, A and B simultaneously, and B alone. The character " / " generally indicates that the preceding and following related objects are in an "or" relationship. The singular forms "a," "the," and "the" are also intended to include the plural forms unless the context clearly indicates otherwise.

[0269] It is further understood that the terms "first," "second," etc., are used to describe various types of information, but this information should not be limited to these terms. These terms are only used to distinguish information of the same type from one another, and do not indicate a specific order or degree of importance. In fact, the expressions "first," "second," etc., are completely interchangeable. For example, without departing from the scope of this disclosure, first information can also be referred to as second information, and similarly, second information can also be referred to as first information.

[0270] It is further understood that the terms “center,” “longitudinal,” “lateral,” “front,” “rear,” “up,” “down,” “left,” “right,” “vertical,” “horizontal,” “top,” “bottom,” “inner,” and “outer,” etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this embodiment and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation.

[0271] It can be further understood that, unless otherwise specified, "connection" includes both direct connections where no other components exist between the two parties and indirect connections where other components exist between them.

[0272] It is further understood that although operations are described in a specific order in the accompanying drawings in the embodiments of this disclosure, this should not be construed as requiring these operations to be performed in the specific order or serial order shown, or requiring all of the shown operations to be performed to obtain the desired result. In certain environments, multitasking and parallel processing may be advantageous.

[0273] Other embodiments of this disclosure will readily occur to those skilled in the art upon consideration of the specification and practice of the invention disclosed herein. This application is intended to cover any variations, uses, or adaptations of this disclosure that follow the general principles of this disclosure and include common knowledge or customary techniques in the art not disclosed herein. The specification and examples are to be considered exemplary only, and the true scope and spirit of this disclosure are indicated by the following claims.

[0274] It should be understood that this disclosure is not limited to the precise structures described above and shown in the accompanying drawings, and various modifications and changes can be made without departing from its scope. The scope of this disclosure is limited only by the appended claims.

Claims

1. A lens, characterized in that, include: A first lens group, the first lens group having positive optical power, the first lens group including a first lens having positive optical power and a second lens having optical power, the first lens and the second lens being arranged on the same optical axis, the second lens being located on the image side of the first lens; The second lens group is located on the image side of the first lens group and is arranged on the same optical axis as the first lens group. The second lens group has negative optical power. The second lens group includes a third lens with negative optical power and a fourth lens with positive optical power. The third lens and the fourth lens are arranged on the same optical axis. The fourth lens is located on the image side of the third lens. The second lens group moves along the optical axis.

2. The lens according to claim 1, characterized in that, The object-facing surface of the first lens is convex at the optical axis; The object-side surface of the second lens is concave at the optical axis, and the image-side surface of the second lens is convex at the optical axis; The surface of the third lens facing the object side is concave at the optical axis; The surface of the fourth lens facing the object side is convex at the optical axis, and the surface of the fourth lens facing the image side is concave at the optical axis.

3. The lens according to claim 2, characterized in that, The first lens group and the second lens group satisfy the following relationship: 0.2<|R 11 / f max |<0.3 0.2<|R 21 / f max |<0.6 0.1<|R 31 / f max |<0.3 0.1<|R 41 / f max |<0.2 Among them, R 11 R is the radius of curvature of the surface of the first lens facing the object side at the optical axis. 21 R is the radius of curvature of the object-facing surface of the second lens at the optical axis. 31 R is the radius of curvature of the surface of the third lens facing the object side at the optical axis. 41 f is the radius of curvature of the surface of the fourth lens facing the object side at the optical axis. max This is the maximum focal length of the lens.

4. The lens according to claim 2, characterized in that, The first lens group and the second lens group satisfy the following relationship: 0.4<R 21 / R 22 <1.1 0.3<R 41 / R 42 <0.7 Among them, R 21 R is the radius of curvature of the object-facing surface of the second lens at the optical axis. 22 R is the radius of curvature of the surface of the second lens facing the image side at the optical axis. 41 R is the radius of curvature of the surface of the fourth lens facing the object side at the optical axis. 42 The radius of curvature of the surface of the fourth lens facing the image side at the optical axis.

5. The lens according to claim 1, characterized in that, The first lens group and the second lens group satisfy the following relationship: 0.4<f1 / f max <0.7 -0.4<f3 / f max <-0.2 0.3<f4 / f max <0.5 Where f1 is the focal length of the first lens, f3 is the focal length of the third lens, f4 is the focal length of the fourth lens, and f max This is the maximum focal length of the lens.

6. The lens according to claim 1, characterized in that, The first lens group and the second lens group satisfy the following relationship: 0.3<DL max / TTL<0.4 Among them, DL max TTL is the maximum distance on the optical axis between the object-side surface of the first lens and the image-side surface of the fourth lens, and TTL is the distance on the optical axis from the object-side surface of the first lens to the photosensitive element.

7. The lens according to claim 1, characterized in that, The first lens group and the second lens group satisfy the following relationship: 1<TTL / f max <1.2 Where TTL is the distance from the object-facing surface of the first lens to the photosensitive element on the optical axis, f max This is the maximum focal length of the lens.

8. The lens according to claim 1, characterized in that, The first lens group and the second lens group satisfy the following relationship: 4 <TTL / ImgH<4.4 Wherein, TTL is the distance from the object-facing surface of the first lens to the photosensitive element on the optical axis, and ImgH is the image height corresponding to 1 / 2 of the maximum field of view of the lens.

9. The lens according to claim 1, characterized in that, The first lens group and the second lens group satisfy the following relationship: 0.2<ImgH / f max <0.3 Where ImgH is the image height corresponding to the maximum field of view of the lens described in 1 / 2, and f max This is the maximum focal length of the lens.

10. The lens according to claim 1, characterized in that, The first lens group and the second lens group satisfy the following relationship: 1<SD 42 / SD 41 <1.1 Among them, SD 41 SD is the perpendicular aperture of the object-facing surface of the fourth lens at the optical axis. 42 The perpendicular aperture of the surface of the fourth lens facing the image side at the optical axis.

11. The lens according to any one of claims 1 to 10, characterized in that, The absolute value of the focal length of the second lens group is greater than the absolute value of the focal length of the first lens group.

12. The lens according to claim 11, characterized in that, The first lens group and the second lens group satisfy the following relationship: 0.5<|f 12 / f max |<0.8 0.9<|f 34 / f max| <1.6 1.5<|f 34 / f 12 |<2.3 Among them, f 12 f is the focal length of the first lens group. 34 f is the focal length of the second lens group. max This is the maximum focal length of the lens.

13. The lens according to claim 11, characterized in that, The first lens group and the second lens group satisfy the following relationship: 0.6<CT 12 / ∑CT<0.8 0.2<CT 34 / ∑CT<0.4 2<CT 12 / CT 34 <2.7 Among them, CT 12 CT is the sum of the thicknesses of each lens in the first lens group along the optical axis. 34 ∑CT is the sum of the thicknesses of each lens in the second lens group along the optical axis. 12 With CT 34 sum.

14. The lens according to claim 13, characterized in that, The first lens group and the second lens group satisfy the following relationship: 2.3 <CT1 / CT2<2.8 1.1 <CT4 / CT3<2.2 Wherein, CT1 is the thickness of the first lens on the optical axis, CT2 is the thickness of the second lens on the optical axis, CT3 is the thickness of the third lens on the optical axis, and CT4 is the thickness of the fourth lens on the optical axis.

15. The lens according to claim 13, characterized in that, The first lens group and the second lens group satisfy the following relationship: 0.9<CT1 / (|SAGYS 11 |+|SAGYS 12 |)<1.8 0.8<CT4 / (|SAGYS 41 |+|SAGYS 42 |)<1.4 Wherein, CT1 is the thickness of the first lens on the optical axis, and SAGYS 11 CT4 is the maximum axial distance between the object-facing surface of the first lens and the vertex of that surface on the optical axis, and SAGYS is the thickness of the fourth lens on the optical axis. 14 The maximum axial distance between the surface of the fourth lens facing the object side and the vertex of that surface on the optical axis.

16. The lens according to claim 11, characterized in that, The second lens group moves along the optical axis to either the macro end or the telephoto end; and The first lens group and the second lens group satisfy the following relationship: 0.6 <Cz2-Cz1<1.2 Wherein, Cz2 is the distance between the second lens and the third lens on the optical axis in the macro state, and Cz1 is the distance between the second lens and the third lens on the optical axis in the telephoto state.

17. A camera module, characterized in that, include: The lens according to any one of claims 1 to 16; The prism is located on the image side of the second lens group; A photosensitive element is located on the image side of the prism.

18. An electronic device, characterized in that, include: The lens according to any one of claims 1 to 16; and / or The camera module as described in claim 17.

Images