Camera lens group

Abstract

The utility model discloses a camera lens group. The camera lens group comprises a lens group, at least one spacing element and a lens barrel used for accommodating the lens group and the at least one spacing element. The lens group sequentially comprises a first lens, a second lens, a third lens and a fourth lens which have focal power from the object side to the image side along the optical axis, the first lens and the third lens have positive focal power, the second lens and the fourth lens have negative focal power, and the number of the lenses with the focal power in the lens group is four. The at least one spacer element includes a second spacer element located on the image side of the second lens and in contact with the image-side surface portion of the second lens. The camera lens group satisfies the following conditions: TD / T23 is more than 6.5 and less than 7.5, and (D2s-d2s) / DT31 is more than 1.5 and less than 4.5.

Description

Technical Field

[0001] The present application relates to the field of optical elements, and in particular, to a camera lens assembly. Background Art

[0002] In recent years, with the advancement of technology, portable electronic devices such as smart phones have been continuously iterated and developed. At the same time, mobile phone users not only have urgent demands for high performance and high quality of mobile phones, but also have an increasing demand for ultra-thin mobile phones. At present, in order to achieve ultra-thin mobile phones in the market, the mobile phone body is usually set to be thinner, but the camera lens group mounted on the mobile phone protrudes from the body, which seriously affects the user's comfort.

[0003] Generally, in the design process of a camera lens assembly, in order to enable the camera lens assembly to be mounted on an ultra-thin mobile phone, it is necessary to reduce the total length of the camera lens assembly and realize miniaturization of the camera lens assembly. However, in the process of miniaturization, there is often an unreasonable design of the overall outline of the lens, and uneven force is likely to occur when assembling the front lens, the rear lens and the lens barrel, which in turn is prone to problems such as tilt, eccentricity and large differences in the rear shape after assembly. Utility Model Content

[0004] The present application provides such a camera lens group, which includes a lens group, at least one spacer element, and a lens barrel for accommodating the lens group and the at least one spacer element in order from the object side to the image side along the optical axis. The lens group includes a first lens, a second lens, a third lens, and a fourth lens with optical power in order from the object side to the image side along the optical axis, wherein the first lens and the third lens have positive optical power, the second lens and the fourth lens have negative optical power, and the number of lenses with optical power in the lens group is four. The at least one spacer element includes a second spacer element located on the image side of the second lens and partially in contact with the image side surface of the second lens. The camera lens group can satisfy: 6.5<TD / T23<7.5 and 1.5<(D2s-d2s) / DT31<4.5, wherein TD is the distance from the object side surface of the first lens to the image side surface of the fourth lens on the optical axis, T23 is the air spacing between the second lens and the third lens on the optical axis, D2s is the outer diameter of the object side surface of the second spacing element, d2s is the inner diameter of the object side surface of the second spacing element, and DT31 is the maximum effective radius of the object side surface of the third lens.

[0005] In one embodiment, at least one mirror surface from the object side surface of the first lens to the image side surface of the fourth lens is an aspherical mirror surface.

[0006] In one embodiment, the camera lens group may satisfy: -1.5<R2 / R1<-0.5 and 1.5<(D0s-d0s) / DT11<7.0, wherein R1 is the radius of curvature of the object side surface of the first lens, R2 is the radius of curvature of the image side surface of the first lens, d0s is the inner diameter of the object side end of the lens barrel, D0s is the outer diameter of the object side end of the lens barrel, and DT11 is the maximum effective radius of the object side surface of the first lens.

[0007] In one embodiment, at least one spacer element further includes a first spacer element located on the image side of the first lens and partially in contact with the image side surface of the first lens. The camera lens group may satisfy: 0.5<(EP01-CT1) / SAG22<8.5, wherein EP01 is the spacing distance from the object side end of the lens barrel to the object side surface of the first spacer element in the direction along the optical axis, CT1 is the center thickness of the first lens on the optical axis, and SAG22 is the distance from the intersection of the image side surface of the second lens and the optical axis to the effective radius vertex of the image side surface of the second lens on the optical axis.

[0008] In one embodiment, at least one spacer element further includes a first spacer element located on the image side of the first lens and partially in contact with the image side surface of the first lens. The camera lens group may satisfy: 2.7<R3 / R4<3.5 and 0.5<N2×CT2 / EP12<1.0, wherein R3 is the radius of curvature of the object side surface of the second lens, R4 is the radius of curvature of the image side surface of the second lens, CT2 is the center thickness of the second lens on the optical axis, N2 is the refractive index of the second lens, and EP12 is the spacing distance from the image side surface of the first spacer element to the object side surface of the second spacer element in the direction along the optical axis.

[0009] In one embodiment, the at least one spacer element further includes a first spacer element located on the image side of the first lens and partially in contact with the image side surface of the first lens. The camera lens assembly may satisfy: -0.8<(D1m-d1m) / f2<-0.1, wherein D1m is the outer diameter of the image side surface of the first spacer element, d1m is the inner diameter of the image side surface of the first spacer element, and f2 is the effective focal length of the second lens.

[0010] In one embodiment, the at least one spacer element further includes a third spacer element located on the image side of the third lens and partially in contact with the image side surface of the third lens. The camera lens assembly may satisfy: 0.5<DT31 / d2m+DT41 / d3m<1.5, wherein d2m is the inner diameter of the image side surface of the second spacer element, d3m is the inner diameter of the image side surface of the third spacer element, DT31 is the maximum effective radius of the object side surface of the third lens, and DT41 is the maximum effective radius of the object side surface of the fourth lens.

[0011] In one embodiment, at least one spacer element further includes a third spacer element located on the image side of the third lens and partially in contact with the image side surface of the third lens. The camera lens group may satisfy: 6.5<R5 / R6<8.0 and -1.5<EP23 / SAG32<-0.1, wherein R5 is the radius of curvature of the object side surface of the third lens, R6 is the radius of curvature of the image side surface of the third lens, SAG32 is the distance from the intersection of the image side surface of the third lens and the optical axis to the effective radius vertex of the image side surface of the third lens on the optical axis, and EP23 is the spacing distance from the image side surface of the second spacer element to the object side surface of the third spacer element in the direction along the optical axis.

[0012] In one embodiment, the at least one spacer element further includes a third spacer element located on the image side of the third lens and partially in contact with the image side surface of the third lens. The camera lens group may satisfy: 2.5<R7 / R8<3.5 and 0<T34 / CP3<5.5, wherein R7 is the radius of curvature of the object side surface of the fourth lens, R8 is the radius of curvature of the image side surface of the fourth lens, CP3 is the maximum thickness of the third spacer element, and T34 is the air spacing between the third lens and the fourth lens on the optical axis.

[0013] In one embodiment, the at least one spacer element further includes a third spacer element located on the image side of the third lens and partially in contact with the image side surface of the third lens. The camera lens assembly may satisfy: 1.0<(D3m-d3m) / (CT4×N4)<2.0, wherein CT4 is the center thickness of the fourth lens on the optical axis, N4 is the refractive index of the fourth lens, D3m is the outer diameter of the image side surface of the third spacer element, and d3m is the inner diameter of the image side surface of the third spacer element.

[0014] In one embodiment, the at least one spacer element further includes a fourth spacer element located on the image side of the fourth lens and partially in contact with the image side surface of the fourth lens, wherein the fourth spacer element includes 1 to 3 fourth auxiliary spacer elements.

[0015] In one embodiment, the first spacing element includes 1 to 2 first auxiliary spacing elements.

[0016] On the other hand, the present application provides such a camera lens group, which includes a lens group, at least one spacer element and a lens barrel for accommodating the lens group and the at least one spacer element in sequence from the object side to the image side along the optical axis. The lens group includes a first lens, a second lens, a third lens and a fourth lens with optical power in sequence from the object side to the image side along the optical axis, wherein the first lens and the third lens have positive optical power, the second lens and the fourth lens have negative optical power, and the number of lenses with optical power in the lens group is four. At least one spacer element includes a first spacer element located on the image side of the first lens and partially in contact with the image side surface of the first lens. The camera lens group can satisfy: 0.5<(EP01-CT1) / SAG22<8.5, wherein EP01 is the spacing distance from the object side end of the lens barrel to the object side surface of the first spacer element in the direction along the optical axis, CT1 is the center thickness of the first lens on the optical axis, and SAG22 is the distance from the intersection of the image side surface of the second lens and the optical axis to the effective radius vertex of the image side surface of the second lens on the optical axis.

[0017] On the other hand, the present application provides such a camera lens group, which includes a lens group, at least one spacer element, and a lens barrel for accommodating the lens group and the at least one spacer element in order from the object side to the image side along the optical axis. The lens group includes a first lens, a second lens, a third lens, and a fourth lens with optical power in order from the object side to the image side along the optical axis, wherein the first lens and the third lens have positive optical power, the second lens and the fourth lens have negative optical power, and the number of lenses with optical power in the lens group is four. The at least one spacer element includes a first spacer element located on the image side of the first lens and partially in contact with the image side surface of the first lens. The camera lens group can satisfy: 2.7<R3 / R4<3.5 and 0.5<N2×CT2 / EP12<1.0, wherein R3 is the curvature radius of the object side surface of the second lens, R4 is the curvature radius of the image side surface of the second lens, CT2 is the center thickness of the second lens on the optical axis, N2 is the refractive index of the second lens, and EP12 is the spacing distance from the image side surface of the first spacing element to the object side surface of the second spacing element in the direction along the optical axis.

[0018] On the other hand, the present application provides such a camera lens group, which includes a lens group, at least one spacer element, and a lens barrel for accommodating the lens group and the at least one spacer element in order from the object side to the image side along the optical axis. The lens group includes a first lens, a second lens, a third lens, and a fourth lens with optical power in order from the object side to the image side along the optical axis, wherein the first lens and the third lens have positive optical power, the second lens and the fourth lens have negative optical power, and the number of lenses with optical power in the lens group is four. At least one spacer element includes a third spacer element located on the image side of the third lens and partially in contact with the image side surface of the third lens. The camera lens group can satisfy: 1.0<(D3m-d3m) / (CT4×N4)<2.0, wherein CT4 is the center thickness of the fourth lens on the optical axis, N4 is the refractive index of the fourth lens, D3m is the outer diameter of the image side surface of the third spacer element, and d3m is the inner diameter of the image side surface of the third spacer element.

[0019] In an exemplary embodiment of the present application, by reasonably setting four lenses, at least one spacer element and a lens barrel and matching 6.5<TD / T23<7.5 and 1.5<(D2s-d2s) / DT31<4.5, it is beneficial to make the camera lens group have a small sensitivity, good assembly stability, small step difference and high imaging quality on the basis of miniaturization. For example, the present application is beneficial to design a miniaturized camera lens group by reasonably matching the lens barrel, four lenses, spacer elements and optical technical parameters 6.5<TD / T23<7.5. On this basis, by setting 1.5<(D2s-d2s) / DT31<4.5, the outer diameter of the image side of the second lens and the object side of the third lens and the distance between the two can be effectively reduced, which is beneficial to reduce the sensitivity caused by the air interval (air gap) between the second lens and the third lens, and is beneficial to make the outer diameter of the second lens and the third lens smaller, and the step difference between the two is smaller, thereby improving the stability of the lens group caused by the step difference and improving the yield of the lens group.

[0020] In another exemplary embodiment of the present application, through the above-mentioned reasonable arrangement of the four lenses, at least one spacing element and the lens barrel and the combination of 0.5<(EP01-CT1) / SAG22<8.5, it is possible to control EP01 to ensure the supporting wall thickness of the object side end of the lens barrel and the edge thickness of the first lens, which is beneficial to improve the assembly strength of the first lens and the lens barrel, and to reduce the risk of ghost images generated by the second lens by controlling SAG22. It is also possible to effectively control the direction of light between the first lens and the second lens and the structure of the two lenses, so that the two lenses meet the processability of assembly and ensure the yield of the lens group.

[0021] In another exemplary embodiment of the present application, by the above-mentioned reasonable arrangement of the four lenses, at least one spacer element and the lens barrel and matching 2.7<R3 / R4<3.5 and 0.5<N2×CT2 / EP12<1.0, it is helpful to reduce the sensitivity of the lens, control the field of view of the lens, reduce the step difference between the lenses, etc. Specifically, satisfying 2.7<R3 / R4<3.5 is conducive to controlling the ratio of the radius of curvature of the object side of the second lens to the radius of curvature of the image side of the second lens within a certain range, which is conducive to reducing the tolerance sensitivity of the second lens and improving the manufacturing yield of the second lens. On this basis, with 0.5<N2×CT2 / EP12<1.0, by controlling CT2 and N2, the light passing through the second lens has a larger deflection angle to meet the design requirements of the field of view, and at the same time, it can also eliminate redundant low-quality light. In addition, by satisfying 0.5<N2×CT2 / EP12<1.0, the overall structure of the first lens to the third lens can be controlled within a certain range, so that the step difference between the three lenses is small to meet the assembly process and improve the stability of the lens group.

[0022] In another exemplary embodiment of the present application, through the reasonable arrangement of the above-mentioned four lenses, at least one spacer element and the lens barrel and the combination of 1.0<(D3m-d3m) / (CT4×N4)<2.0, it is beneficial to control the difference between D3m and d3m within a reasonable range, and then to control the assembly step difference between the third lens and the fourth lens within a certain range, thereby improving the stability of the lens group, and it is also beneficial to control CT4 and N4, and then to adjust the size of the optical area of ​​the fourth lens, so that the light emitted from the fourth lens is away from the optical axis direction to meet the field of view design requirements, and at the same time, it can also improve the structural strength of the third lens. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Other features, objects and advantages of the present application will become more apparent by reading the detailed description of non-limiting embodiments made with reference to the following drawings:

[0024] Figure 1 is a schematic structural diagram of a camera lens assembly according to Embodiment 1;

[0025] Figure 2 is a schematic structural diagram of a camera lens assembly according to Embodiment 2;

[0026] FIG. 3A to FIG. 3D The axial chromatic aberration curve, astigmatism curve, distortion curve and magnification chromatic aberration curve of the camera lens set of Example 1 and Example 2 are respectively shown;

[0027] Figure 4 is a schematic structural diagram of a camera lens assembly according to Embodiment 3;

[0028] Figure 5is a schematic structural diagram of a camera lens assembly according to Embodiment 4;

[0029] FIG. 6A to FIG. 6D The axial chromatic aberration curve, astigmatism curve, distortion curve and magnification chromatic aberration curve of the camera lens set of Example 3 and Example 4 are respectively shown;

[0030] Figure 7 is a schematic structural diagram of a camera lens assembly according to Embodiment 5;

[0031] Figure 8 is a schematic structural diagram of a camera lens assembly according to Embodiment 6;

[0032] 9A to 9D The axial chromatic aberration curve, astigmatism curve, distortion curve and magnification chromatic aberration curve of the camera lens set of Example 5 and Example 6 are respectively shown;

[0033] Fig.10 is a schematic structural diagram of a camera lens assembly according to Embodiment 7;

[0034] Fig.11 is a schematic structural diagram of a camera lens assembly according to Embodiment 8;

[0035] FIG. 12A to FIG. 12D The axial chromatic aberration curve, astigmatism curve, distortion curve and magnification chromatic aberration curve of the camera lens set of Example 7 and Example 8 are respectively shown;

[0036] Fig.13 is a schematic diagram of some parameters of a camera lens assembly according to an embodiment of the present application;

[0037] Fig.14 is a schematic diagram of parameters DT31 and SAG32 of a camera lens assembly according to an embodiment of the present application; and

[0038] Fig.15 A simulation curve chart of the axial pressure on the air gap of a camera lens assembly in multiple samples is shown. DETAILED DESCRIPTION

[0039] In order to better understand the present application, a more detailed description will be made of various aspects of the present application with reference to the accompanying drawings. It should be understood that these detailed descriptions are only descriptions of exemplary embodiments of the present application, and are not intended to limit the scope of the present application in any way. Throughout the specification, the same reference numerals refer to the same elements. The expression "and / or" includes any and all combinations of one or more of the associated listed items.

[0040] It should be noted that in this specification, the expressions of first, second, third, etc. are only used to distinguish one feature from another feature, and do not represent any limitation on the features. Therefore, without departing from the teaching of the present application, the first lens discussed below may also be referred to as the second lens or the third lens, and the first spacing element may also be referred to as the second spacing element or the third spacing element.

[0041] In the accompanying drawings, the thickness, size and shape of the lens have been slightly exaggerated for ease of description. Specifically, the shapes of the spherical or aspherical surfaces shown in the accompanying drawings are shown by way of example. That is, the shapes of the spherical or aspherical surfaces are not limited to the shapes of the spherical or aspherical surfaces shown in the accompanying drawings. The accompanying drawings are only examples and are not drawn strictly to scale. It should be understood that the thickness, size and shape of the spacing element and the lens barrel have also been slightly exaggerated in the accompanying drawings for ease of description.

[0042] In this article, the paraxial area refers to the area near the optical axis. If the lens surface is convex and the position of the convex surface is not defined, it means that the lens surface is convex at least in the paraxial area; if the lens surface is concave and the position of the concave surface is not defined, it means that the lens surface is concave at least in the paraxial area. The surface of each lens closest to the subject is called the object side of the lens, and the surface of each lens closest to the imaging plane is called the image side of the lens. It should be understood that the surface of each spacer element closest to the subject is called the object side of the spacer element, and the surface of each spacer element closest to the imaging plane is called the image side of the spacer element. The surface of the lens barrel closest to the subject is called the object side end of the lens barrel, and the surface of the lens barrel closest to the imaging plane is called the image side end of the lens barrel.

[0043] It should also be understood that the terms "comprises", "including", "having", "includes" and / or "comprising", when used in this specification, indicate the presence of the stated features, elements and / or components, but do not exclude the presence or addition of one or more other features, elements, components and / or combinations thereof. In addition, when expressions such as "at least one of..." appear after a list of listed features, they modify the entire listed features rather than modifying the individual elements in the list. In addition, when describing embodiments of the present application, "may" is used to mean "one or more embodiments of the present application". And, the term "exemplary" is intended to refer to an example or illustration.

[0044] Unless otherwise defined, all terms (including technical terms and scientific terms) used in this article have the same meaning as those commonly understood by ordinary technicians in the field to which this application belongs. It should also be understood that terms (such as terms defined in commonly used dictionaries) should be interpreted as having the same meaning as their meaning in the context of the relevant technology, and will not be interpreted in an idealized or overly formal sense unless explicitly defined in this article.

[0045] It should be noted that, in the absence of conflict, the embodiments in the present application and the features in the embodiments can be combined with each other. The following embodiments only express several implementation methods of the present application, and the descriptions are relatively specific and detailed, but they cannot be understood as limiting the scope of the present application. It should be pointed out that for those of ordinary skill in the art, without departing from the concept of the present application, several deformations and improvements can be made, which all belong to the protection scope of the present application. For example, the lens groups (i.e., the first lens to the fourth lens), the lens barrel structure and the spacing elements in the embodiments of the present application can be combined arbitrarily, and are not limited to the lens groups in one embodiment can only be combined with the lens barrel structure, spacing elements, etc. of the embodiment. The present application will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0046] The features, principles and other aspects of the present application are described in detail below.

[0047] The camera lens group according to the exemplary embodiment of the present application may include four lenses with optical power, namely a first lens, a second lens, a third lens and a fourth lens. The four lenses are arranged in sequence from the object side to the image side along the optical axis. Any two adjacent lenses from the first lens to the fourth lens may have a spacing distance. Any lens from the first lens to the fourth lens may have a central thickness on the optical axis.

[0048] According to an exemplary embodiment of the present application, the first lens to the fourth lens may have an optical region for optical imaging and a non-optical region extending outward from the periphery of the optical region. Generally speaking, the optical region refers to the region of the lens for optical imaging, and the non-optical region is the structural region of the lens. During the assembly process of the camera lens group, a spacer element may be provided at the non-optical region of each lens and each lens may be connected to the lens barrel respectively by a process such as glue spot bonding. During the imaging process of the camera lens group, the optical region of each lens may transmit light from an object to form an optical path and form a final optical image; and the non-optical region of each lens after assembly is accommodated in a lens barrel that cannot transmit light, so that the non-optical region does not directly participate in the imaging process of the camera lens group. It should be noted that for ease of description, the present application divides each lens into two parts, the optical region and the non-optical region, for description, but it should be understood that the optical region and the non-optical region of the lens may be formed as a whole during the manufacturing process, rather than being formed as two separate parts.

[0049] In one embodiment of the present application, the camera lens group may include at least one spacer element, for example, it may include at least one spacer element among the first spacer element, the second spacer element and the third spacer element. The first spacer element may be located on the image side of the first lens and partially contact the image side surface of the first lens, and it may abut against the non-optical area of ​​the image side surface of the first lens. The second spacer element may be located on the image side of the second lens and partially contact the image side surface of the second lens, and it may abut against the non-optical area of ​​the image side surface of the second lens. The third spacer element may be located on the image side of the third lens and partially contact the image side surface of the third lens, and it may abut against the non-optical area of ​​the image side surface of the third lens. Exemplarily, the first spacer element may contact the non-optical area of ​​the image side surface of the first lens, and may contact the non-optical area of ​​the object side surface of the second lens. For example, the object side surface of the first spacer element may contact the non-optical area of ​​the image side surface of the first lens, and the image side surface of the first spacer element may contact the non-optical area of ​​the object side surface of the second lens.

[0050] In another embodiment of the present application, the camera lens assembly may further include a fourth spacing element located on the image side of the fourth lens and partially in contact with the image side surface of the fourth lens, wherein the fourth spacing element includes 1 to 3 fourth auxiliary spacing elements. The present application is beneficial to reducing stray light in the camera lens assembly and improving the assembly stability of the camera lens assembly by providing multiple spacing elements and multiple auxiliary spacing elements. Exemplarily, the first spacing element may include 1 to 2 first auxiliary spacing elements.

[0051] like Figure 1 As shown, the camera lens group according to an exemplary embodiment of the present application may include a lens barrel P0 that accommodates the lens group and at least one spacing element. Exemplarily, the lens barrel P0 may be an integrated lens barrel for accommodating the first lens E1 to the fourth lens E4 and the first spacing element P1 to the third spacing element P3.

[0052] According to an exemplary embodiment of the present application, the spacing element may include at least one spacing piece. By reasonably setting the number, thickness, inner diameter and outer diameter of the spacing pieces, it is helpful to improve the assembly of the camera lens group, block stray light, and improve the imaging quality of the camera lens group.

[0053] In an exemplary embodiment, the first lens may have a positive focal power; the second lens may have a negative focal power; the third lens may have a positive focal power; and the fourth lens may have a negative focal power. By reasonably setting the focal powers of the first lens to the fourth lens, the present application can effectively reduce the total length of the lens group, reduce the overall aberration of the camera lens group, and improve the resolution of the lens group, so as to achieve a camera lens group that is compact and has high pixel characteristics.

[0054] In an exemplary embodiment, the camera lens assembly according to the present application may satisfy: 6.5<TD / T23<7.5 and 1.5<(D2s-d2s) / DT31<4.5, wherein TD is the distance from the object side surface of the first lens to the image side surface of the fourth lens on the optical axis, T23 is the air interval between the second lens and the third lens on the optical axis, and D2s is the outer diameter of the object side surface of the second spacer element ( Fig.13 ), d2s is the inner diameter of the object side of the second spacing element ( Fig.13 ), DT31 is the maximum effective radius of the object side of the third lens ( Fig.14 ).

[0055] In the present application, by the above-mentioned reasonable arrangement of the four lenses, at least one spacer element and the lens barrel and matching 6.5<TD / T23<7.5 and 1.5<(D2s-d2s) / DT31<4.5, it is beneficial to make the camera lens group have a small sensitivity, good assembly stability, small step difference and high imaging quality on the basis of miniaturization. For example, the present application is beneficial to design a miniaturized camera lens group by reasonably matching the lens barrel, four lenses, spacer elements and optical technical parameters 6.5<TD / T23<7.5. On this basis, by setting 1.5<(D2s-d2s) / DT31<4.5, the outer diameter of the image side of the second lens and the object side of the third lens and the distance between the two can be effectively reduced, which is beneficial to reduce the sensitivity caused by the air interval (air gap) between the second lens and the third lens, and is beneficial to make the outer diameter of the second lens and the third lens smaller, and the step difference between the two smaller, thereby improving the stability of the lens group caused by the step difference and improving the yield of the lens group.

[0056] The present application has conducted multiple groups (more than 10 groups) of tests on camera lens groups that meet different conditions. The test results of multiple groups under the same conditions are not much different. The following lists as examples the test results of several groups of camera lens groups under different conditions.

[0057] As shown in the following table and Fig.15 As shown, Sample 1 shows the sensitivity between adjacent lenses in a camera lens group that satisfies TD / T23=6.72 and (D2s-d2s) / DT31=1.87, Sample 2 shows the sensitivity between adjacent lenses in a camera lens group that satisfies TD / T23=6.26 and (D2s-d2s) / DT31=1.43, and Sample 3 shows the sensitivity between adjacent lenses in a camera lens group that satisfies TD / T23=7.74 and (D2s-d2s) / DT31=4.88.

[0058]

[0059] From the above table and Fig.15It can be seen that compared with samples 2 and 3, the sensitivity between adjacent lenses in sample 1, such as the sensitivity ΔSP1 between the first lens and the second lens, the sensitivity ΔSP2 between the second lens and the third lens, and the sensitivity ΔSP3 between the third lens and the fourth lens, are all smaller. The present application sets 6.5<TD / T23<7.5 and 1.5<(D2s-d2s) / DT31<4.5, which can not only reduce the sensitivity caused by the air interval (air gap) between adjacent lenses, but also improve the assembly stability of the camera lens group, reduce the step difference between lenses, and improve the yield of the lens group.

[0060] In an exemplary embodiment, the camera lens assembly according to the present application may satisfy: -1.5<R2 / R1<-0.5 and 1.5<(D0s-d0s) / DT11<7.0, wherein R1 is the curvature radius of the object side surface of the first lens, R2 is the curvature radius of the image side surface of the first lens, d0s is the inner diameter of the object side end of the lens barrel ( Fig.13 ), D0s is the outer diameter of the object side of the lens tube ( Fig.13 ), DT11 is the maximum effective radius of the object side of the first lens. In the design of the lens group, it is usually necessary to control the outer diameter-to-thickness ratio of the lens within a reasonable range to ensure the surface shape of the lens, and it is also necessary to set the wall thickness of the lens barrel to be relatively uniform to improve the molding effect of the lens barrel. The present application is conducive to controlling the ratio of the radius of curvature of the object side of the first lens and the radius of curvature of the image side of the first lens within a certain range by setting -1.5<R2 / R1<-0.5, which is conducive to reducing the incident angle and the exit angle of the external field of view on the first lens, which is conducive to reducing the tolerance sensitivity of the first lens and improving the manufacturing yield of the first lens. On this basis, with 1.5<(D0s-d0s) / DT11<7.0, it is conducive to controlling the maximum effective radius of the object side of the first lens and the inner and outer diameters of the object side end of the lens barrel within a reasonable range, which is conducive to controlling the outer diameter-to-thickness ratio of the first lens within a reasonable range, which is conducive to making the wall thickness of the lens barrel relatively uniform, and is conducive to improving the assembly strength of the object side of the first lens and the object side end of the lens barrel.

[0061] In an exemplary embodiment, the camera lens assembly according to the present application may satisfy: 0.5<(EP01-CT1) / SAG22<8.5, wherein EP01 is the spacing distance from the object side end of the lens barrel to the object side surface of the first spacing element in the direction along the optical axis ( Fig.13 ), CT1 is the center thickness of the first lens on the optical axis, and SAG22 is the distance from the intersection of the image side surface of the second lens and the optical axis to the vertex of the effective radius of the image side surface of the second lens on the optical axis.

[0062] In the present application, by the above-mentioned reasonable arrangement of the four lenses, at least one spacing element and the lens barrel and matching 0.5<(EP01-CT1) / SAG22<8.5, it is possible to control EP01 to ensure the supporting wall thickness of the object side end of the lens barrel and the edge thickness of the first lens, which is beneficial to improve the assembly strength of the first lens and the lens barrel, and to reduce the risk of ghost images produced by the second lens by controlling SAG22. It is also possible to effectively control the direction of light between the first lens and the second lens and the structure of the two lenses, so that the two lenses meet the processability of assembly and ensure the yield of the lens group.

[0063] In an exemplary embodiment, the camera lens assembly according to the present application may satisfy: 2.7<R3 / R4<3.5 and 0.5<N2×CT2 / EP12<1.0, wherein R3 is the radius of curvature of the object side surface of the second lens, R4 is the radius of curvature of the image side surface of the second lens, CT2 is the center thickness of the second lens on the optical axis, N2 is the refractive index of the second lens, and EP12 is the spacing distance from the image side surface of the first spacing element to the object side surface of the second spacing element in the direction along the optical axis ( Fig.13 ).

[0064] In the present application, by the above-mentioned reasonable arrangement of the four lenses, at least one spacer element and the lens barrel and matching 2.7<R3 / R4<3.5 and 0.5<N2×CT2 / EP12<1.0, it is helpful to reduce the sensitivity of the lens, control the field of view of the lens, reduce the step difference between the lenses, etc. Specifically, satisfying 2.7<R3 / R4<3.5 is helpful to control the ratio of the radius of curvature of the object side of the second lens to the radius of curvature of the image side of the second lens within a certain range, which is helpful to reduce the tolerance sensitivity of the second lens and improve the manufacturing yield of the second lens. On this basis, with 0.5<N2×CT2 / EP12<1.0, by controlling CT2 and N2, the light passing through the second lens has a larger deflection angle to meet the design requirements of the field of view, and at the same time, it can also eliminate redundant low-quality light. In addition, by satisfying 0.5<N2×CT2 / EP12<1.0, the overall structure of the first lens to the third lens can be controlled within a certain range, so that the step difference between the three lenses is small to meet the assembly process and improve the stability of the lens group.

[0065] In an exemplary embodiment, the camera lens assembly according to the present application may satisfy: -0.8<(D1m-d1m) / f2<-0.1, wherein D1m is the outer diameter of the image side surface of the first spacing element ( Fig.13 ), d1m is the inner diameter of the image side of the first spacing element ( Fig.13), f2 is the effective focal length of the second lens. When -0.8<(D1m-d1m) / f2<-0.1 is satisfied, the inner and outer diameters of the image side of the first spacing element can be controlled within a reasonable range, which is beneficial for the first spacing element to meet the process technology requirements, and is also beneficial for the inner diameter of the first spacing element to block excess light and reduce stray light in the lens group. In addition, when -0.8<(D1m-d1m) / f2<-0.1 is satisfied, the optical path range through the exit pupil of the camera lens group can be reasonably limited, light with poor edge quality can be eliminated, and the residual field of view non-imaging light can be avoided from being reflected inside the camera lens group to the imaging surface, thereby improving the imaging quality of the lens group.

[0066] In an exemplary embodiment, the camera lens assembly according to the present application may satisfy: 0.5<DT31 / d2m+DT41 / d3m<1.5, wherein d2m is the inner diameter of the image side surface of the second spacing element, and d3m is the inner diameter of the image side surface of the third spacing element ( Fig.13 ), DT31 is the maximum effective radius of the object side of the third lens ( Fig.14 ), DT41 is the maximum effective radius of the object side of the fourth lens. When 0.5<DT31 / d2m+DT41 / d3m<1.5 is satisfied, the shapes of the third lens and the fourth lens can be effectively constrained by limiting the maximum effective radius of the object side of the third lens and the maximum effective radius of the object side of the fourth lens, which is beneficial to effectively improve the illumination characteristics of the lens group, and stray light can be shielded by controlling the inner diameters of the second spacing element and the third spacing element. In addition, when 0.5<DT31 / d2m+DT41 / d3m<1.5 is satisfied, it can also ensure that there are spacing elements that support each other between adjacent lenses to avoid light leakage caused by misaligned support or inadequate support. At the same time, by limiting the maximum effective radius of the object side of the third lens and the maximum effective radius of the object side of the fourth lens, the overall size of the lens group can be controlled within a certain range to meet the needs of miniaturization.

[0067] In an exemplary embodiment, the camera lens assembly according to the present application may satisfy: 6.5<R5 / R6<8.0 and -1.5<EP23 / SAG32<-0.1, wherein R5 is the radius of curvature of the object side surface of the third lens, R6 is the radius of curvature of the image side surface of the third lens, and SAG32 is the distance from the intersection of the image side surface of the third lens and the optical axis to the effective radius vertex of the image side surface of the third lens on the optical axis ( Fig.14 ), EP23 is the distance between the image side of the second spacing element and the object side of the third spacing element along the optical axis ( Fig.13). Meeting 6.5<R5 / R6<8.0 is conducive to controlling the ratio of the radius of curvature of the object side of the third lens to the radius of curvature of the image side of the third lens within a certain range, which is conducive to reducing the off-axis aberration of the lens group and improving the imaging quality of the lens group. On this basis, matching -1.5<EP23 / SAG32<-0.1 is conducive to controlling the outer diameter and shape of the third lens, so that the outer diameter thickness ratio and thickness ratio of the entire lens are excellent, and reducing the problems of release during the molding process of the third lens.

[0068] In an exemplary embodiment, the camera lens assembly according to the present application may satisfy: 2.5<R7 / R8<3.5 and 0<T34 / CP3<5.5, wherein R7 is the radius of curvature of the object side surface of the fourth lens, R8 is the radius of curvature of the image side surface of the fourth lens, and CP3 is the maximum thickness of the third spacer element ( Fig.13 ), T34 is the air gap between the third lens and the fourth lens on the optical axis. Meeting 2.5<R7 / R8<3.5 is conducive to controlling the ratio of the radius of curvature of the object side of the fourth lens to the radius of curvature of the image side of the fourth lens within a certain range, which is conducive to reducing the astigmatism and distortion of the lens group and improving the imaging quality of the lens group. On this basis, with 0<T34 / CP3<5.5, the curvature of the third lens and the fourth lens can be effectively reduced by controlling the air gap between the third lens and the fourth lens and the maximum thickness of the third spacing element within a reasonable range, reducing the molding risk and appearance risk of the third lens and the fourth lens, and achieving the two lenses can still maintain good performance under high temperature, high humidity and thermal shock conditions, thereby greatly improving the overall stability of the lens group.

[0069] In an exemplary embodiment, the camera lens assembly according to the present application may satisfy: 1.0<(D3m-d3m) / (CT4×N4)<2.0, wherein CT4 is the center thickness of the fourth lens on the optical axis, N4 is the refractive index of the fourth lens, and D3m is the outer diameter of the image side surface of the third spacer element ( Fig.13 ), d3m is the inner diameter of the image side of the third spacing element ( Fig.13 ).

[0070] In the design process of the camera lens group, the smaller the step difference between the lenses, the better the assembly stability, and the higher the stability of the lens group. In the present application, through the above-mentioned reasonable arrangement of the four lenses, at least one spacing element and the lens barrel and the combination of 1.0<(D3m-d3m) / (CT4×N4)<2.0, it is not only conducive to controlling the difference between D3m and d3m within a reasonable range, but also conducive to controlling the assembly step difference between the third lens and the fourth lens within a certain range, improving the stability of the lens group, but also conducive to controlling CT4 and N4, and thus conducive to adjusting the size of the optical area of ​​the fourth lens, so that the light emitted from the fourth lens is away from the optical axis direction to meet the field of view design requirements, and at the same time, it can also improve the structural strength of the third lens.

[0071] In an exemplary embodiment, the camera lens group according to the present application further includes an aperture arranged between the object side and the first lens. Optionally, the above-mentioned camera lens group may further include a filter for correcting color deviation and / or a protective glass for protecting the photosensitive element located on the imaging surface. The present application proposes a camera lens group with the characteristics of miniaturization, good assembly stability, small step difference, low sensitivity, high stability, high yield rate and high imaging quality. The camera lens group according to the above-mentioned embodiment of the present application may use multiple lenses, such as the four lenses mentioned above. By reasonably allocating the focal length, surface shape, material, center thickness of each lens and the on-axis spacing between each lens, the incident light can be effectively converged, the total optical length of the camera lens group can be reduced, and the processability of the camera lens group can be improved, so that the camera lens group is more conducive to production and processing. In the camera lens group of the above-mentioned embodiment of the present application, by arranging a spacer element between adjacent lenses and designing the inner and outer diameters of the spacer element according to the optical path, stray light can be effectively blocked and eliminated, and the imaging quality of the lens group can be improved.

[0072] In the embodiment of the present application, at least one of the mirror surfaces of each lens is an aspherical mirror surface, that is, at least one of the mirror surfaces from the object side surface of the first lens to the image side surface of the fourth lens is an aspherical mirror surface. The characteristic of an aspherical lens is that the curvature changes continuously from the center of the lens to the periphery of the lens. Unlike a spherical lens having a constant curvature from the center of the lens to the periphery of the lens, an aspherical lens has a better curvature radius characteristic, and has the advantages of improving distortion aberration and improving astigmatism aberration. After adopting an aspherical lens, the aberration occurring during imaging can be eliminated as much as possible, thereby improving the imaging quality. Optionally, at least one of the object side surface and the image side surface of each lens in the first lens, the second lens, the third lens and the fourth lens is an aspherical mirror surface. Optionally, the object side surface and the image side surface of each lens in the first lens, the second lens, the third lens and the fourth lens are all aspherical mirror surfaces.

[0073] However, it should be understood by those skilled in the art that, without departing from the technical solution claimed in the present application, the number of lenses constituting the camera lens group can be changed to obtain the various results and advantages described in this specification. For example, although four lenses are described as an example in the embodiments, the camera lens group is not limited to including four lenses. If necessary, the camera lens group may also include other numbers of lenses.

[0074] Specific embodiments of the camera lens assembly applicable to the above-mentioned embodiments will be further described below with reference to the accompanying drawings.

[0075] Example 1

[0076] The following reference Figure 1 A camera lens assembly according to Embodiment 1 of the present application is described. Figure 1 The imaging lens set of Example 1 is shown.

[0077] like Figure 1 As shown, the camera lens group includes, from the object side to the image side, an aperture STO (not shown), a first lens E1, a second lens E2, a third lens E3, a fourth lens E4, a filter (not shown) and an imaging surface (not shown).

[0078] The first lens E1 has positive power, and its object side surface S1 is convex, and its image side surface S2 is convex. The second lens E2 has negative power, and its object side surface S3 is convex, and its image side surface S4 is concave. The third lens E3 has positive power, and its object side surface S5 is concave, and its image side surface S6 is convex. The fourth lens E4 has negative power, and its object side surface S7 is convex, and its image side surface S8 is concave. The filter has an object side surface S9 and an image side surface S10. The light from the object passes through each surface S1 to S10 in sequence and is finally imaged on the imaging surface S11.

[0079] Table 1 shows a basic parameter table of the camera lens set of Example 1, wherein the units of the curvature radius, thickness / distance and focal length are all millimeters (mm).

[0080]

[0081]

[0082] Table 1

[0083] In this example, the total effective focal length f of the camera lens group is 3.32 mm, the maximum effective radius DT11 of the object side surface of the first lens is 0.78 mm, the maximum effective radius DT31 of the object side surface of the third lens is 1.20 mm, the maximum effective radius DT41 of the object side surface of the fourth lens is 2.22 mm, the distance SAG22 from the intersection of the image side surface of the second lens and the optical axis to the vertex of the effective radius of the image side surface of the second lens on the optical axis is 0.13 mm, and the distance SAG32 from the intersection of the image side surface of the third lens and the optical axis to the vertex of the effective radius of the image side surface of the third lens on the optical axis is -0.83 mm.

[0084] like Figure 1 As shown, the camera lens group may include three spacing elements, namely, a first spacing element P1, a second spacing element P2, and a third spacing element P3. The lens barrel P0 may accommodate the first lens E1 to the fourth lens E4 and the first spacing element P1 to the third spacing element P3.

[0085] Table 2-1 and Table 2-2 show basic parameter tables of each spacing element in the camera lens group of Example 1, wherein the unit of each parameter is millimeter (mm).

[0086] parameter d1m D1m d2s d2m D2s d3m D3m Numeric 2.62 3.5 2.29 2.29 4.53 3.02 5.98

[0087] Table 2-1

[0088] parameter d0s D0s EP01 EP12 EP23 CP3 Numeric 2.52 4.27 1.02 0.75 0.44 0.02

[0089] Table 2-2

[0090] It should be understood that in this example, the structures and parameters of each spacing element are only exemplarily listed, and the specific structure and actual parameters of each spacing element are not explicitly defined. In actual production, the specific structure and actual parameters of each spacing element can be set in any appropriate manner.

[0091] In Example 1, the object side surface and the image side surface of any lens among the first lens E1 to the fourth lens E4 are both aspherical surfaces, and the surface shape x of each aspherical lens can be defined by but not limited to the following aspherical surface formula:

[0092]

[0093] Wherein, x is the distance vector height from the vertex of the aspheric surface when the aspheric surface is at a height of h along the optical axis; c is the paraxial curvature of the aspheric surface, c=1 / R (i.e., the paraxial curvature c is the reciprocal of the curvature radius R in Table 1 above); k is the cone coefficient; Ai is the correction coefficient of the i-th order of the aspheric surface. The following Tables 3-1 and 3-2 give the high-order coefficients A4, A6, A8, A9, A10, A11, A12, A13, A14, A15, A16, A17, A18, A19, A20, A21, A22, A23, A24, A25, A26, A27, A28, A29, A30, A31, A32, A33, A34, A35, A36, A37 10 , A 12, A 14 , A 16 , A 18 , A 20 , A 22 , A 24 , A 26 , A 28 and A 30 .

[0094]

[0095]

[0096] Table 3-1

[0097] Face number A18 A20 A22 A24 A26 A28 A30 S1 1.28E-05 3.01E-06 5.37E-06 2.77E-06 4.45E-06 0.00E+00 0.00E+00 S2 2.55E-05 2.40E-06 1.31E-05 8.07E-06 6.98E-06 0.00E+00 0.00E+00 S3 1.85E-05 -1.20E-05 3.74E-06 -6.98E-06 -4.55E-07 0.00E+00 0.00E+00 S4 1.10E-05 3.91E-07 -8.73E-06 1.28E-06 -3.21E-06 0.00E+00 0.00E+00 S5 1.61E-03 7.93E-04 4.11E-04 1.33E-04 6.49E-05 2.19E-05 0.00E+00 S6 -1.50E-03 -3.09E-04 4.15E-05 2.20E-04 1.58E-04 1.33E-04 4.21E-05 S7 1.45E-04 2.98E-04 -3.76E-04 2.54E-04 -3.25E-04 1.69E-04 -1.64E-04 S8 8.96E-03 -4.44E-03 3.02E-03 -1.01E-03 7.15E-04 -8.95E-06 2.71E-04

[0098] Table 3-2

[0099] Example 2

[0100] The following reference Figure 2 The camera lens assembly according to Embodiment 2 of the present application is described. In this embodiment and the following embodiments, for the sake of brevity, some descriptions similar to Embodiment 1 will be omitted. Figure 2 The imaging lens set of Example 2 is shown.

[0101] like Figure 2 As shown, the camera lens group includes, from the object side to the image side, an aperture STO (not shown), a first lens E1, a second lens E2, a third lens E3, a fourth lens E4, a filter (not shown) and an imaging surface (not shown).

[0102] In this example, the structures and parameters of the aperture STO, the first lens E1, the second lens E2, the third lens E3, the fourth lens E4, the filter and the imaging surface may be the same as those of the aperture STO, the first lens E1, the second lens E2, the third lens E3, the fourth lens E4, the filter and the imaging surface in Example 1. Therefore, the basic parameter table of the camera lens set of this example is completely the same as the basic parameters shown in Table 1 in Example 1. To avoid redundant description, this example will not be described in detail. For details, please refer to the relevant contents disclosed in Example 1.

[0103] In this example, the high-order coefficients of the aspherical mirror surfaces S1-S8 may be the same as the high-order coefficients of the aspherical mirror surfaces S1-S8 shown in Tables 3-1 and 3-2 in Example 1. Therefore, to avoid redundancy, this example does not introduce the high-order coefficients of the aspherical mirror surfaces S1-S8 in detail, and the details can be referred to the relevant contents disclosed in Example 1.

[0104] In this example, the values ​​of the optical technical parameters f, DT11, DT31, SAG22 and SAG32 may be the same as the values ​​of f, DT11, DT31, SAG22 and SAG32 in Example 1. Therefore, to avoid redundancy, this example does not introduce the values ​​of these parameters in detail, and the details can be referred to the relevant contents disclosed in Example 1.

[0105] like Figure 2 As shown, the camera lens group may include three spacing elements, namely, a first spacing element P1, a second spacing element P2, and a third spacing element P3. The lens barrel P0 may accommodate the first lens E1 to the fourth lens E4 and the first spacing element P1 to the third spacing element P3.

[0106] Table 4-1 and Table 4-2 show basic parameter tables of each spacing element in the camera lens assembly of Example 2, wherein the unit of each parameter is millimeter (mm).

[0107] parameter d1m D1m d2s d2m D2s d3m D3m Numeric 1.89 4.46 2.27 2.27 5.97 3.98 6.61

[0108] Table 4-1

[0109] parameter d0s D0s EP01 EP12 EP23 CP3 Numeric 2.77 4.52 1.46 0.85 0.84 0.03

[0110] Table 4-2

[0111] It should be understood that in this example, the structures and parameters of each spacing element are only exemplarily listed, and the specific structure and actual parameters of each spacing element are not explicitly defined. In actual production, the specific structure and actual parameters of each spacing element can be set in any appropriate manner.

[0112] Figure 3A The axial chromatic aberration curves of the camera lens groups of Example 1 and Example 2 are shown, which indicate the deviation of the focusing point of light rays of different wavelengths after passing through the lens group. Figure 3B Astigmatism curves of the imaging lens sets of Examples 1 and 2 are shown, which represent meridional image curvature and sagittal image curvature. Figure 3C The distortion curves of the camera lens groups of Example 1 and Example 2 are shown, which represent the distortion magnitude values ​​corresponding to different image heights. Figure 3D The magnification chromatic aberration curves of the camera lens set of Example 1 and Example 2 are shown, which represent the deviations of different image heights on the imaging surface after the light passes through the lens set. FIG. 3A to FIG. 3D It can be seen that the camera lens groups provided in Example 1 and Example 2 can achieve good imaging quality.

[0113] Example 3

[0114] The following reference Figure 4 A camera lens assembly according to Embodiment 3 of the present application is described. Figure 4A camera lens set according to Example 3 is shown.

[0115] like Figure 4 As shown, an aperture STO (not shown), a first lens E1, a second lens E2, a third lens E3, a fourth lens E4, a filter (not shown) and an imaging surface (not shown).

[0116] The first lens E1 has positive power, and its object side surface S1 is convex, and its image side surface S2 is convex. The second lens E2 has negative power, and its object side surface S3 is convex, and its image side surface S4 is concave. The third lens E3 has positive power, and its object side surface S5 is concave, and its image side surface S6 is convex. The fourth lens E4 has negative power, and its object side surface S7 is convex, and its image side surface S8 is concave. The filter has an object side surface S9 and an image side surface S10. The light from the object passes through each surface S1 to S10 in sequence and is finally imaged on the imaging surface S11.

[0117] Table 5 shows a basic parameter table of the camera lens set of Example 3, wherein the units of the curvature radius, thickness / distance and focal length are all millimeters (mm).

[0118]

[0119]

[0120] Table 5

[0121] In this example, the total effective focal length f of the camera lens group is 3.26 mm, the maximum effective radius DT11 of the object side surface of the first lens is 0.80 mm, the maximum effective radius DT31 of the object side surface of the third lens is 1.17 mm, the maximum effective radius DT41 of the object side surface of the fourth lens is 2.25 mm, the distance SAG22 from the intersection of the image side surface of the second lens and the optical axis to the effective radius vertex of the image side surface of the second lens on the optical axis is 0.13 mm, and the distance SAG32 from the intersection of the image side surface of the third lens and the optical axis to the effective radius vertex of the image side surface of the third lens on the optical axis is -0.86 mm.

[0122] like Figure 4 As shown, the camera lens group may include three spacing elements, namely, a first spacing element P1, a second spacing element P2, and a third spacing element P3. The lens barrel P0 may accommodate the first lens E1 to the fourth lens E4 and the first spacing element P1 to the third spacing element P3.

[0123] Table 6-1 and Table 6-2 show basic parameter tables of each spacing element in the camera lens group of Example 3, wherein the unit of each parameter is millimeter (mm).

[0124] parameter d1m D1m d2s d2m D2s d3m D3m Numeric 1.92 4.91 2.28 2.28 6.61 4.34 7.22

[0125] Table 6-1

[0126] parameter d0s D0s EP01 EP12 EP23 CP3 Numeric 2.39 6.31 1.04 0.93 1.16 0.02

[0127] Table 6-2

[0128] It should be understood that in this example, the structures and parameters of each spacing element are only exemplarily listed, and the specific structure and actual parameters of each spacing element are not explicitly defined. In actual production, the specific structure and actual parameters of each spacing element can be set in any appropriate manner.

[0129] Tables 7-1 and 7-2 below show the high-order coefficients of each aspherical mirror surface that can be used in Example 3, wherein each aspherical surface shape can be defined by the formula (1) given in Example 1 above.

[0130] Face number A4 A6 A8 A10 A12 A14 A16 S1 -3.66E-02 -3.66E-03 -2.57E-04 0.00E+00 0.00E+00 0.00E+00 0.00E+00 S2 -8.93E-02 1.49E-02 1.40E-03 9.66E-04 2.13E-04 9.64E-05 0.00E+00 S3 -1.39E-01 3.25E-02 -9.83E-04 -3.53E-04 0.00E+00 0.00E+00 0.00E+00 S4 -1.04E-01 2.65E-02 -1.50E-03 3.38E-04 0.00E+00 0.00E+00 0.00E+00 S5 -1.02E-01 -1.50E-02 9.19E-04 4.10E-03 2.05E-03 1.36E-03 4.60E-04 S6 3.18E-01 -5.15E-02 3.31E-02 9.21E-03 4.98E-03 3.19E-05 -3.00E-04 S7 -1.72E+00 4.63E-01 -1.24E-01 2.74E-02 -1.48E-02 6.10E-03 -3.90E-03 S8 -5.82E+00 1.20E+00 -3.96E-01 1.54E-01 -7.84E-02 3.34E-02 -1.88E-02

[0131] Table 7-1

[0132]

[0133]

[0134] Table 7-2

[0135] Example 4

[0136] The following reference Figure 5 A camera lens assembly according to Embodiment 4 of the present application is described. Figure 5 A camera lens set according to Example 4 is shown.

[0137] like Figure 5 As shown, the camera lens group includes, from the object side to the image side, an aperture STO (not shown), a first lens E1, a second lens E2, a third lens E3, a fourth lens E4, a filter (not shown) and an imaging surface (not shown).

[0138] In this example, the structures and parameters of the aperture STO, the first lens E1, the second lens E2, the third lens E3, the fourth lens E4, the filter and the imaging surface may be the same as those of the aperture STO, the first lens E1, the second lens E2, the third lens E3, the fourth lens E4, the filter and the imaging surface in Example 3. Therefore, the basic parameter table of the camera lens set of this example is completely the same as the basic parameters shown in Table 5 in Example 3. To avoid redundant description, this example will not be described in detail. For details, please refer to the relevant contents disclosed in Example 3.

[0139] In this example, the high-order coefficients of the aspherical mirror surfaces S1-S8 may be the same as the high-order coefficients of the aspherical mirror surfaces S1-S8 shown in Tables 7-1 and 7-2 in Example 3. Therefore, to avoid redundancy, this example does not introduce the high-order coefficients of the aspherical mirror surfaces S1-S8 in detail, and the details can be referred to the relevant contents disclosed in Example 3.

[0140] In this example, the values ​​of the optical technical parameters f, DT11, DT31, SAG22 and SAG32 may be the same as the values ​​of f, DT11, DT31, SAG22 and SAG32 in Example 3. Therefore, to avoid redundancy, this example does not introduce the values ​​of these parameters in detail, and the details can be referred to the relevant contents disclosed in Example 3.

[0141] like Figure 5 As shown, the camera lens group may include three spacing elements, namely, a first spacing element P1, a second spacing element P2, and a third spacing element P3. The lens barrel P0 may accommodate the first lens E1 to the fourth lens E4 and the first spacing element P1 to the third spacing element P3.

[0142] Table 8-1 and Table 8-2 show basic parameter tables of each spacing element in the camera lens group of Example 4, wherein the unit of each parameter is millimeter (mm).

[0143] parameter d1m D1m d2s d2m D2s d3m D3m Numeric 3.50 4.38 2.33 2.33 5.3 5.88 6.30

[0144] Table 8-1

[0145] parameter d0s D0s EP01 EP12 EP23 CP3 Numeric 2.33 3.87 0.95 0.75 0.57 0.59

[0146] Table 8-2

[0147] It should be understood that in this example, the structures and parameters of each spacing element are only exemplarily listed, and the specific structure and actual parameters of each spacing element are not explicitly defined. In actual production, the specific structure and actual parameters of each spacing element can be set in any appropriate manner.

[0148] Fig. 6A The axial chromatic aberration curves of the camera lens groups of Examples 3 and 4 are shown, which indicate the deviation of the focusing point of light rays of different wavelengths after passing through the lens group. Figure 6B The astigmatism curves of the imaging lens groups of Examples 3 and 4 are shown, which represent the meridional image curvature and the sagittal image curvature. Figure 6C The distortion curves of the camera lens groups of Example 3 and Example 4 are shown, which represent the distortion magnitude values ​​corresponding to different image heights. Fig.6D The magnification chromatic aberration curves of the camera lens group of Example 3 and Example 4 are shown, which represent the deviations of different image heights on the imaging surface after the light passes through the lens group. FIG. 6A to FIG. 6DIt can be seen that the camera lens groups provided in Examples 3 and 4 can achieve good imaging quality.

[0149] Example 5

[0150] The following reference Figure 7 A camera lens assembly according to Embodiment 5 of the present application is described. Figure 7 A camera lens set according to Example 5 is shown.

[0151] like Figure 7 As shown, an aperture STO (not shown), a first lens E1, a second lens E2, a third lens E3, a fourth lens E4, a filter (not shown) and an imaging surface (not shown).

[0152] The first lens E1 has positive power, and its object side surface S1 is convex, and its image side surface S2 is convex. The second lens E2 has negative power, and its object side surface S3 is convex, and its image side surface S4 is concave. The third lens E3 has positive power, and its object side surface S5 is concave, and its image side surface S6 is convex. The fourth lens E4 has negative power, and its object side surface S7 is convex, and its image side surface S8 is concave. The filter has an object side surface S9 and an image side surface S10. The light from the object passes through each surface S1 to S10 in sequence and is finally imaged on the imaging surface S11.

[0153] Table 9 shows a basic parameter table of the camera lens set of Example 5, wherein the units of the curvature radius, thickness / distance and focal length are all millimeters (mm).

[0154]

[0155] Table 9

[0156] In this example, the total effective focal length f of the camera lens group is 3.23 mm, the maximum effective radius DT11 of the object side surface of the first lens is 0.80 mm, the maximum effective radius DT31 of the object side surface of the third lens is 1.20 mm, the maximum effective radius DT41 of the object side surface of the fourth lens is 2.19 mm, the distance SAG22 from the intersection of the image side surface of the second lens and the optical axis to the effective radius vertex of the image side surface of the second lens on the optical axis is 0.13 mm, and the distance SAG32 from the intersection of the image side surface of the third lens and the optical axis to the effective radius vertex of the image side surface of the third lens on the optical axis is -0.80 mm.

[0157] like Figure 7 As shown, the camera lens group may include three spacing elements, namely, a first spacing element P1, a second spacing element P2, and a third spacing element P3. The lens barrel P0 may accommodate the first lens E1 to the fourth lens E4 and the first spacing element P1 to the third spacing element P3.

[0158] Table 10-1 and Table 10-2 show basic parameter tables of each spacing element in the camera lens group of Example 5, wherein the unit of each parameter is millimeter (mm).

[0159] parameter d1m D1m d2s d2m D2s d3m D3m Numeric 1.98 6.70 2.35 2.35 7.29 4.00 8.30

[0160] Table 10-1

[0161] parameter d0s D0s EP01 EP12 EP23 CP3 Numeric 3.39 8.69 1.91 0.79 0.83 0.02

[0162] Table 10-2

[0163] It should be understood that in this example, the structures and parameters of each spacing element are only exemplarily listed, and the specific structure and actual parameters of each spacing element are not explicitly defined. In actual production, the specific structure and actual parameters of each spacing element can be set in any appropriate manner.

[0164] The following Tables 11-1 and 11-2 show the high-order coefficients of each aspherical mirror surface that can be used in Example 5, wherein each aspherical surface shape can be defined by the formula (1) given in the above Example 1.

[0165] Face number A4 A6 A8 A10 A12 A14 A16 S1 -3.74E-02 -4.00E-03 -3.46E-04 0.00E+00 0.00E+00 0.00E+00 0.00E+00 S2 -9.09E-02 1.35E-02 1.76E-03 1.25E-03 2.97E-04 1.50E-04 0.00E+00 S3 -1.40E-01 3.09E-02 -5.50E-04 -4.11E-04 0.00E+00 0.00E+00 0.00E+00 S4 -1.08E-01 2.60E-02 -1.06E-03 6.28E-04 0.00E+00 0.00E+00 0.00E+00 S5 -1.16E-01 -4.06E-03 -4.31E-04 5.00E-03 2.44E-03 1.26E-03 1.24E-05 S6 3.30E-01 -1.82E-02 3.42E-02 7.23E-03 5.93E-03 -3.39E-03 -2.75E-03 S7 -1.82E+00 4.08E-01 -8.78E-02 2.62E-02 -2.19E-02 -4.30E-03 6.29E-03 S8 -5.94E+00 1.26E+00 -3.79E-01 1.61E-01 -7.81E-02 2.91E-02 -6.03E-03

[0166] Table 11-1

[0167] Face number A18 A20 A22 A24 A26 A28 A30 S1 0.00E+00 0.00E+00 0.00E+00 0.00E+00 0.00E+00 0.00E+00 0.00E+00 S2 0.00E+00 0.00E+00 0.00E+00 0.00E+00 0.00E+00 0.00E+00 0.00E+00 S3 0.00E+00 0.00E+00 0.00E+00 0.00E+00 0.00E+00 0.00E+00 0.00E+00 S4 0.00E+00 0.00E+00 0.00E+00 0.00E+00 0.00E+00 0.00E+00 0.00E+00 S5 4.32E-05 0.00E+00 0.00E+00 0.00E+00 0.00E+00 0.00E+00 0.00E+00 S6 -1.33E-03 0.00E+00 0.00E+00 0.00E+00 0.00E+00 0.00E+00 0.00E+00 S7 -7.29E-03 0.00E+00 0.00E+00 0.00E+00 0.00E+00 0.00E+00 0.00E+00 S8 0.00E+00 0.00E+00 0.00E+00 0.00E+00 0.00E+00 0.00E+00 0.00E+00

[0168] Table 11-2

[0169] Example 6

[0170] The following reference Figure 8 A camera lens assembly according to Embodiment 6 of the present application is described. Figure 8 A camera lens set according to Example 6 is shown.

[0171] like Figure 8 As shown, the camera lens group includes, from the object side to the image side, an aperture STO (not shown), a first lens E1, a second lens E2, a third lens E3, a fourth lens E4, a filter (not shown) and an imaging surface (not shown).

[0172] In this example, the structures and parameters of the aperture STO, the first lens E1, the second lens E2, the third lens E3, the fourth lens E4, the filter and the imaging surface may be the same as those of the aperture STO, the first lens E1, the second lens E2, the third lens E3, the fourth lens E4, the filter and the imaging surface in Example 5. Therefore, the basic parameter table of the camera lens set of this example is completely the same as the basic parameters shown in Table 9 in Example 5. To avoid redundant description, this example will not be described in detail. For details, please refer to the relevant contents disclosed in Example 5.

[0173] In this example, the high-order coefficients of the aspherical mirror surfaces S1-S8 may be the same as the high-order coefficients of the aspherical mirror surfaces S1-S8 shown in Tables 11-1 and 11-2 in Example 5. Therefore, to avoid redundancy, this example does not introduce the high-order coefficients of the aspherical mirror surfaces S1-S8 in detail, and the details can be referred to the relevant contents disclosed in Example 5.

[0174] In this example, the values ​​of the optical technical parameters f, DT11, DT31, SAG22 and SAG32 may be the same as the values ​​of f, DT11, DT31, SAG22 and SAG32 in Example 5. Therefore, to avoid redundancy, the values ​​of these parameters are not described in detail in this example, and the details may refer to the relevant contents disclosed in Example 5.

[0175] like Figure 8 As shown, the camera lens group may include three spacing elements, namely, a first spacing element P1, a second spacing element P2, and a third spacing element P3. The lens barrel P0 may accommodate the first lens E1 to the fourth lens E4 and the first spacing element P1 to the third spacing element P3.

[0176] Table 12-1 and Table 12-2 show the basic parameter tables of each spacing element in the camera lens group of Example 6, wherein the unit of each parameter is millimeter (mm).

[0177] parameter d1m D1m d2s d2m D2s d3m D3m Numeric 1.98 5.21 2.34 2.34 5.77 3.88 8.57

[0178] Table 12-1

[0179] parameter d0s D0s EP01 EP12 EP23 CP3 Numeric 3.66 8.95 1.79 0.96 0.80 0.02

[0180] Table 12-2

[0181] It should be understood that in this example, the structures and parameters of each spacing element are only exemplarily listed, and the specific structure and actual parameters of each spacing element are not explicitly defined. In actual production, the specific structure and actual parameters of each spacing element can be set in any appropriate manner.

[0182] Fig. 9A The axial chromatic aberration curves of the camera lens groups of Examples 5 and 6 are shown, which indicate the deviation of the focusing point of light rays of different wavelengths after passing through the lens group. Fig. 9B Astigmatism curves of the imaging lens groups of Examples 5 and 6 are shown, which represent meridional image curvature and sagittal image curvature. Fig. 9C The distortion curves of the camera lens groups of Example 5 and Example 6 are shown, which represent the distortion magnitude values ​​corresponding to different image heights. Fig.9D The magnification chromatic aberration curves of the camera lens group of Example 5 and Example 6 are shown, which represent the deviations of different image heights on the imaging surface after the light passes through the lens group. 9A to 9D It can be seen that the camera lens groups provided in Examples 5 and 6 can achieve good imaging quality.

[0183] Example 7

[0184] The following reference Fig.10 A camera lens assembly according to Embodiment 7 of the present application is described. Fig.10 A camera lens group according to Example 7 is shown.

[0185] like Fig.10 As shown, an aperture STO (not shown), a first lens E1, a second lens E2, a third lens E3, a fourth lens E4, a filter (not shown) and an imaging surface (not shown).

[0186] The first lens E1 has positive power, and its object side surface S1 is convex, and its image side surface S2 is convex. The second lens E2 has negative power, and its object side surface S3 is convex, and its image side surface S4 is concave. The third lens E3 has positive power, and its object side surface S5 is concave, and its image side surface S6 is convex. The fourth lens E4 has negative power, and its object side surface S7 is convex, and its image side surface S8 is concave. The filter has an object side surface S9 and an image side surface S10. The light from the object passes through each surface S1 to S10 in sequence and is finally imaged on the imaging surface S11.

[0187] Table 13 shows a basic parameter table of the camera lens set of Example 7, wherein the units of the curvature radius, thickness / distance and focal length are all millimeters (mm).

[0188]

[0189] Table 13

[0190] In this example, the total effective focal length f of the camera lens group is 3.75 mm, the maximum effective radius DT11 of the object side surface of the first lens is 0.99 mm, the maximum effective radius DT31 of the object side surface of the third lens is 1.44 mm, the maximum effective radius DT41 of the object side surface of the fourth lens is 2.67 mm, the distance SAG22 from the intersection of the image side surface of the second lens and the optical axis to the effective radius vertex of the image side surface of the second lens on the optical axis is 0.18 mm, and the distance SAG32 from the intersection of the image side surface of the third lens and the optical axis to the effective radius vertex of the image side surface of the third lens on the optical axis is -1.02 mm.

[0191] like Fig.10 As shown, the camera lens group may include three spacing elements, namely, a first spacing element P1, a second spacing element P2, and a third spacing element P3. The lens barrel P0 may accommodate the first lens E1 to the fourth lens E4 and the first spacing element P1 to the third spacing element P3.

[0192] Table 14-1 and Table 14-2 show the basic parameter tables of each spacing element in the camera lens group of Example 7, wherein the unit of each parameter is millimeter (mm).

[0193] parameter d1m D1m d2s d2m D2s d3m D3m Numeric 2.43 5.67 2.80 2.80 6.12 7.07 7.49

[0194] Table 14-1

[0195] parameter d0s D0s EP01 EP12 EP23 CP3 Numeric 3.60 7.51 1.92 0.93 0.51 0.79

[0196] Table 14-2

[0197] It should be understood that in this example, the structures and parameters of each spacing element are only exemplarily listed, and the specific structure and actual parameters of each spacing element are not explicitly defined. In actual production, the specific structure and actual parameters of each spacing element can be set in any appropriate manner.

[0198] The following Tables 15-1 and 15-2 show the high-order coefficients of each aspherical mirror surface that can be used in Example 7, wherein each aspherical surface shape can be defined by the formula (1) given in the above Example 1.

[0199] Face number A4 A6 A8 A10 A12 A14 A16 S1 -4.35E-02 -4.24E-03 -3.18E-04 0.00E+00 0.00E+00 0.00E+00 0.00E+00 S2 -1.10E-01 1.87E-02 1.32E-03 1.39E-03 3.66E-04 2.50E-04 0.00E+00 S3 -1.65E-01 4.27E-02 -2.15E-03 -5.09E-04 0.00E+00 0.00E+00 0.00E+00 S4 -1.21E-01 3.10E-02 -1.92E-03 3.73E-04 0.00E+00 0.00E+00 0.00E+00 S5 -1.39E-01 -2.29E-02 -1.34E-03 5.34E-03 2.63E-03 2.06E-03 6.32E-04 S6 4.07E-01 -4.54E-02 4.28E-02 1.16E-02 6.58E-03 -5.70E-04 -4.71E-04 S7 -2.09E+00 5.65E-01 -1.42E-01 3.72E-02 -1.83E-02 7.51E-03 -2.61E-03 S8 -7.04E+00 1.50E+00 -4.56E-01 1.92E-01 -9.29E-02 4.01E-02 -1.96E-02

[0200] Table 15-1

[0201] Face number A18 A20 A22 A24 A26 A28 A30 S1 0.00E+00 0.00E+00 0.00E+00 0.00E+00 0.00E+00 0.00E+00 0.00E+00 S2 0.00E+00 0.00E+00 0.00E+00 0.00E+00 0.00E+00 0.00E+00 0.00E+00 S3 0.00E+00 0.00E+00 0.00E+00 0.00E+00 0.00E+00 0.00E+00 0.00E+00 S4 0.00E+00 0.00E+00 0.00E+00 0.00E+00 0.00E+00 0.00E+00 0.00E+00 S5 4.79E-04 0.00E+00 0.00E+00 0.00E+00 0.00E+00 0.00E+00 0.00E+00 S6 -3.99E-04 0.00E+00 0.00E+00 0.00E+00 0.00E+00 0.00E+00 0.00E+00 S7 -7.14E-04 0.00E+00 0.00E+00 0.00E+00 0.00E+00 0.00E+00 0.00E+00 S8 9.14E-03 -6.05E-03 2.17E-03 -1.61E-03 7.16E-04 -1.07E-05 3.25E-04

[0202] Table 15-2

[0203] Example 8

[0204] The following reference Fig.11 Describe the camera lens group according to Example 8 of the present application. Fig.11 A camera lens group according to Example 8 is shown.

[0205] like Fig.11 As shown, the camera lens group includes, from the object side to the image side, an aperture STO (not shown), a first lens E1, a second lens E2, a third lens E3, a fourth lens E4, a filter (not shown) and an imaging surface (not shown).

[0206] In this example, the structures and parameters of the aperture STO, the first lens E1, the second lens E2, the third lens E3, the fourth lens E4, the filter and the imaging surface may be the same as those of the aperture STO, the first lens E1, the second lens E2, the third lens E3, the fourth lens E4, the filter and the imaging surface in Example 7. Therefore, the basic parameter table of the camera lens set of this example is completely the same as the basic parameters shown in Table 13 in Example 7. To avoid redundant description, this example will not be described in detail. For details, please refer to the relevant contents disclosed in Example 7.

[0207] In this example, the high-order coefficients of the aspherical mirror surfaces S1-S8 may be the same as the high-order coefficients of the aspherical mirror surfaces S1-S8 shown in Tables 15-1 and 15-2 in Example 7. Therefore, to avoid redundancy, this example does not introduce the high-order coefficients of the aspherical mirror surfaces S1-S8 in detail, and the details can be referred to the relevant contents disclosed in Example 7.

[0208] In this example, the values ​​of the optical technical parameters f, DT11, DT31, SAG22 and SAG32 may be the same as the values ​​of f, DT11, DT31, SAG22 and SAG32 in Example 7. Therefore, to avoid redundancy, this example does not introduce the values ​​of these parameters in detail, and the details can be referred to the relevant contents disclosed in Example 7.

[0209] like Fig.11 As shown, the camera lens group may include three spacing elements, namely, a first spacing element P1, a second spacing element P2, and a third spacing element P3. The lens barrel P0 may accommodate the first lens E1 to the fourth lens E4 and the first spacing element P1 to the third spacing element P3.

[0210] Table 16-1 and Table 16-2 show the basic parameter tables of each spacing element in the camera lens group of Example 8, wherein the unit of each parameter is millimeter (mm).

[0211] parameter d1m D1m d2s d2m D2s d3m D3m Numeric 2.41 4.42 2.79 2.79 6.36 3.79 7.65

[0212] Table 16-1

[0213] parameter d0s D0s EP01 EP12 EP23 CP3 Numeric 3.43 7.75 1.72 1.03 0.59 0.02

[0214] Table 16-2

[0215] It should be understood that in this example, the structures and parameters of each spacing element are only exemplarily listed, and the specific structure and actual parameters of each spacing element are not explicitly defined. In actual production, the specific structure and actual parameters of each spacing element can be set in any appropriate manner.

[0216] Fig. 12AThe axial chromatic aberration curves of the camera lens groups of Examples 7 and 8 are shown, which indicate the deviation of the focal point of light rays of different wavelengths after passing through the lens group. Fig. 12B Astigmatism curves of the imaging lens groups of Examples 7 and 8 are shown, which represent meridional image curvature and sagittal image curvature. Fig. 12C The distortion curves of the camera lens groups of Example 7 and Example 8 are shown, which represent the distortion magnitude values ​​corresponding to different image heights. Fig.12D The magnification chromatic aberration curves of the camera lens groups of Example 7 and Example 8 are shown, which represent the deviations of different image heights on the imaging surface after the light passes through the lens group. FIG. 12A to FIG. 12D It can be seen that the camera lens groups provided in Examples 7 and 8 can achieve good imaging quality.

[0217] In summary, Examples 1 to 8 satisfy the relationships shown in Tables 17-1 and 17-2, respectively.

[0218]

[0219]

[0220] Table 17-1

[0221] Conditional / Example Example 5 Example 6 Example 7 Example 8 TD / T23 6.83 6.83 6.94 6.94 (D2s-d2s) / DT31 4.11 2.86 2.30 2.48 R2 / R1 -1.11 -1.11 -1.09 -1.09 R3 / R4 2.84 2.84 2.72 2.72 R5 / R6 6.96 6.96 7.43 7.43 R7 / R8 2.61 2.61 2.75 2.75 (D0s-d0s) / DT11 6.61 6.61 3.96 4.38 (EP01-CT1) / SAG22 8.24 7.35 5.10 4.04 N2×CT2 / EP12 0.90 0.75 0.93 0.84 (D1m-d1m) / f2 -0.75 -0.51 -0.43 -0.27 DT31 / d2m+DT41 / d3m 1.06 1.08 0.89 1.22 EP23 / SAG32 -1.04 -1.00 -0.50 -0.58 T34 / CP3 4.55 4.55 0.15 5.37 (D3m-d3m) / (CT4×N4) 7.42 8.08 0.52 4.79

[0222] Table 17-2

[0223] The present application also provides an imaging device, whose electronic photosensitive element can be a photosensitive coupled device (CCD) or a complementary metal oxide semiconductor element (CMOS). The imaging device can be an independent imaging device such as a digital camera, or an imaging module integrated in a mobile electronic device such as a mobile phone. The imaging device is equipped with the camera lens group described above.

[0224] The above description is only a preferred embodiment of the present application and an explanation of the technical principles used. Those skilled in the art should understand that the scope of the invention involved in the present application is not limited to the technical solution formed by a specific combination of the above technical features, but should also cover other technical solutions formed by any combination of the above technical features or their equivalent features without departing from the inventive concept. For example, the above features are replaced with the technical features with similar functions disclosed in this application (but not limited to) by each other.

Claims

1. A camera lens assembly, characterized in that: include: A lens group, comprising, in order from the object side to the image side along the optical axis, a first lens, a second lens, a third lens and a fourth lens having optical power, wherein the first lens and the third lens have positive optical power, the second lens and the fourth lens have negative optical power, and the number of lenses having optical power in the lens group is four; at least one spacer element, including a second spacer element located on the image side of the second lens and in partial contact with the image side surface of the second lens; as well as a lens barrel for accommodating the lens group and the at least one spacer element; Wherein, the camera lens group satisfies: 6.5<TD / T23<7.5 and 1.5<(D2s-d2s) / DT31<4.5, wherein TD is the distance from the object side surface of the first lens to the image side surface of the fourth lens on the optical axis, T23 is the air gap between the second lens and the third lens on the optical axis, D2s is the outer diameter of the object side surface of the second spacing element, d2s is the inner diameter of the object side surface of the second spacing element, and DT31 is the maximum effective radius of the object side surface of the third lens.

2. The camera lens assembly according to claim 1, characterized in that: The camera lens group satisfies: -1.5<R2 / R1<-0.5 and 1.5<(D0s-d0s) / DT11<7.0, wherein R1 is the curvature radius of the object side surface of the first lens, R2 is the curvature radius of the image side surface of the first lens, d0s is the inner diameter of the object side end of the lens barrel, D0s is the outer diameter of the object side end of the lens barrel, and DT11 is the maximum effective radius of the object side surface of the first lens.

3. The camera lens assembly according to claim 1, characterized in that: The at least one spacer element further comprises a first spacer element located on the image side of the first lens and partially in contact with the image side surface of the first lens, The camera lens group satisfies: 0.5<(EP01-CT1) / SAG22<8.5, wherein EP01 is the spacing distance from the object side end of the lens barrel to the object side surface of the first spacing element in the direction along the optical axis, CT1 is the center thickness of the first lens on the optical axis, and SAG22 is the distance from the intersection of the image side surface of the second lens and the optical axis to the effective radius vertex of the image side surface of the second lens on the optical axis.

4. The camera lens assembly according to claim 1, characterized in that: The at least one spacer element further comprises a first spacer element located on the image side of the first lens and partially in contact with the image side surface of the first lens, The camera lens group satisfies: 2.7<R3 / R4<3.5 and 0.5<N2×CT2 / EP12<1.0, wherein R3 is the radius of curvature of the object side surface of the second lens, R4 is the radius of curvature of the image side surface of the second lens, CT2 is the center thickness of the second lens on the optical axis, N2 is the refractive index of the second lens, and EP12 is the spacing distance from the image side surface of the first spacing element to the object side surface of the second spacing element in the direction along the optical axis.

5. The camera lens assembly according to claim 1, characterized in that: The at least one spacer element further comprises a first spacer element located on the image side of the first lens and partially in contact with the image side surface of the first lens, The camera lens group satisfies: -0.8<(D1m-d1m) / f2<-0.1, wherein D1m is the outer diameter of the image side surface of the first spacing element, d1m is the inner diameter of the image side surface of the first spacing element, and f2 is the effective focal length of the second lens.

6. The camera lens assembly according to claim 1, characterized in that: The at least one spacer element further includes a third spacer element located on the image side of the third lens and partially in contact with the image side surface of the third lens, The camera lens group satisfies: 0.5<DT31 / d2m+DT41 / d3m<1.5, wherein d2m is the inner diameter of the image side surface of the second spacing element, d3m is the inner diameter of the image side surface of the third spacing element, DT31 is the maximum effective radius of the object side surface of the third lens, and DT41 is the maximum effective radius of the object side surface of the fourth lens.

7. The camera lens assembly according to claim 1, characterized in that: The at least one spacer element further includes a third spacer element located on the image side of the third lens and partially in contact with the image side surface of the third lens, The camera lens group satisfies: 6.5<R5 / R6<8.0 and -1.5<EP23 / SAG32<-0.1, wherein R5 is the curvature radius of the object side surface of the third lens, R6 is the curvature radius of the image side surface of the third lens, SAG32 is the distance from the intersection of the image side surface of the third lens and the optical axis to the effective radius vertex of the image side surface of the third lens on the optical axis, and EP23 is the spacing distance from the image side surface of the second spacing element to the object side surface of the third spacing element in the direction along the optical axis.

8. The camera lens assembly according to claim 1, characterized in that: The at least one spacer element further includes a third spacer element located on the image side of the third lens and partially in contact with the image side surface of the third lens, The camera lens group satisfies: 2.5<R7 / R8<3.5 and 0<T34 / CP3<5.5, wherein R7 is the radius of curvature of the object side surface of the fourth lens, R8 is the radius of curvature of the image side surface of the fourth lens, CP3 is the maximum thickness of the third spacing element, and T34 is the air spacing between the third lens and the fourth lens on the optical axis.

9. The camera lens assembly according to claim 1, characterized in that: The at least one spacer element further includes a third spacer element located on the image side of the third lens and partially in contact with the image side surface of the third lens, The camera lens group satisfies: 1.0<(D3m-d3m) / (CT4×N4)<2.0, wherein CT4 is the center thickness of the fourth lens on the optical axis, N4 is the refractive index of the fourth lens, D3m is the outer diameter of the image side surface of the third spacing element, and d3m is the inner diameter of the image side surface of the third spacing element.

10. The camera lens assembly according to any one of claims 1 to 9, characterized in that: The at least one spacer element further includes a fourth spacer element located on the image side of the fourth lens and partially in contact with the image side surface of the fourth lens, wherein the fourth spacer element includes 1 to 3 fourth auxiliary spacer elements.

11. The camera lens assembly according to claim 3, characterized in that: The first spacing element includes 1 to 2 first auxiliary spacing elements.

Images