Camera lens assembly

Abstract

The application provides a camera lens group, comprising: a first lens, a second lens and a third lens, the object side and the image side of the third lens each having a reverse point; a first spacer element and a second spacer element; a lens barrel for accommodating the plurality of lenses and the plurality of spacer elements; the central thickness of the second lens on the optical axis of the camera lens group is the maximum value among the central thicknesses of all the plurality of lenses on the optical axis; the maximum height L of the lens barrel and the central thickness CT2 of the second lens on the optical axis satisfy: 4.5 < L / CT2 < 5.5; the effective focal length f1 of the first lens and the effective focal length f2 of the second lens satisfy: 0 < f1 / f2 < 1.0; the radius of curvature R2 of the image side of the first lens, the inner diameter d1s of the object side of the first spacer element, the inner diameter d2m of the image side of the second spacer element, and the radius of curvature R4 of the image side of the second lens satisfy: 3.2 < R2 / d1s*(d2m / R4) < 5.5. The application solves the problem of serious front-end stray light of the camera lens group in the prior art.

Description

Technical Field

[0001] The present invention relates to the technical field of imaging devices, in particular, to an imaging lens assembly. Background Art

[0002] In recent years, with the development of science and technology, especially the rapid development of the emerging optical industry, users have put forward higher requirements for the use experience of VR / AR products, and the requirements for the imaging quality of the imaging lens assembly mounted on the products are also getting higher and higher. Due to unreasonable arrangement of the optical path, marginal light is likely to be incident on the structural part of the lens to generate stray light, and meanwhile, the lens surface will also reflect light to generate stray light. Especially for the front lens of a three-piece imaging lens assembly, if a large amount of stray light is generated and incident on the rear lens without being processed in time, and a large amount of stray light is directly incident on the imaging surface, it will greatly reduce the imaging quality of the imaging lens assembly. Therefore, how to control the optical parameters of the front lens of the imaging lens assembly and the inner diameter of the spacing element arranged therebetween to reduce stray light while ensuring the imaging quality is an urgent problem to be solved. Summary of the Invention

[0003] The main object of the present invention is to provide an imaging lens assembly to solve the problem of serious front-end stray light in the imaging lens assembly in the prior art.

[0004] In order to achieve the above object, the present invention provides an imaging lens assembly, comprising: a plurality of lenses, wherein the plurality of lenses comprise a first lens, a second lens and a third lens sequentially arranged from the object side to the image side of the imaging lens assembly, and the object side surface and the image side surface of the third lens each have one inflection point; a plurality of spacing elements, wherein the spacing element located on the image side of the first lens and at least partially in contact with the image side surface of the first lens is a first spacing element, and the spacing element located on the image side of the second lens and at least partially in contact with the image side surface of the second lens is a second spacing element; a lens barrel, wherein the lens barrel is configured to accommodate the plurality of lenses and the plurality of spacing elements; wherein the central thickness of the second lens on the optical axis of the imaging lens assembly is the maximum value among the central thicknesses of all the plurality of lenses on the optical axis; the maximum height L of the lens barrel and the central thickness CT2 of the second lens on the optical axis satisfy: 4.5 < L / CT2 < 5.5; the effective focal length f1 of the first lens and the effective focal length f2 of the second lens satisfy: 0 < f1 / f2 < 1.0; the curvature radius R2 of the image side surface of the first lens, the inner diameter d1s of the object side surface of the first spacing element, the inner diameter d2m of the image side surface of the second spacing element, and the curvature radius R4 of the image side surface of the second lens satisfy: 3.2 < R2 / d1s*(d2m / R4) < 5.5.

[0005] Furthermore, the outer diameter D1s of the object side of the first spacer element, the inner diameter d1s of the object side of the first spacer element, and the air gap T12 between the first lens and the second lens on the optical axis satisfy the following: 5.0 < (D1s - d1s) / T12 < 16.7.

[0006] Furthermore, the inner diameter d0s of the object-side end face of the lens barrel, the minimum opening diameter d0smin of the object side of the lens barrel, the effective focal length f of the camera lens group, and the effective focal length f1 of the first lens satisfy the following condition: -7.0 < (d0s - d0smin) / (f - f1) < -4.8.

[0007] Furthermore, the radius of curvature R4 of the image side of the second lens, the radius of curvature R3 of the object side of the second lens, the inner diameter d2m of the image side of the second spacer element, and the inner diameter d2s of the object side of the second spacer element satisfy the following condition: 0.5 < (R4 / R3) / (d2m / d2s) < 1.5.

[0008] Furthermore, the effective focal length f2 of the second lens, the radius of curvature R4 of the image-side surface of the second lens, the radius of curvature R3 of the object-side surface of the second lens, and the inner diameter d2s of the object-side surface of the second spacer element satisfy the following condition: -7.5mm <f2 / (R3+R4)*d2s<-1.5mm。

[0009] Furthermore, the inner diameter d2m of the image side of the second spacer element and the effective half-aperture DT31 of the object side of the third lens satisfy the following relationship: 1.5 <d2m / DT31<3.0。

[0010] Furthermore, the following conditions must be met: the spacing EP12 between the first and second spacers along the optical axis, the center thickness CT2 of the second lens along the optical axis, the axial distance SAG22 between the intersection of the image-side surface of the second lens and the optical axis and the vertex of the effective radius of the image-side surface of the second lens, and the axial distance SAG21 between the intersection of the object-side surface of the second lens and the optical axis and the vertex of the effective radius of the object-side surface of the second lens, satisfying: 2.0 <EP12 / CT2+(SAG22 / SAG21)<3.5。

[0011] Furthermore, the outer diameter D2m of the image side of the second spacer element, the inner diameter d2m of the image side of the second spacer element, the radius of curvature R5 of the object side of the third lens, and the radius of curvature R6 of the image side of the third lens satisfy the following condition: 0 < (D2m - d2m) / (R5 + R6) < 1.5.

[0012] Furthermore, the maximum height L of the lens barrel, the effective focal length f of the camera lens group, and half of the maximum field of view (Semi-FOV) of the camera lens group satisfy the following relationship: 1.9 <L / (f / tan(Semi-FOV))<2.5。

[0013] Further, the following relationship is satisfied among an inner diameter d0m of an image-side end surface of a lens barrel, an outer diameter D2s of an object-side surface of a second spacer element, a curvature radius R5 of an object-side surface of a third lens, and a curvature radius R4 of an image-side surface of a second lens: 0<(d0m-D2s) / (R5+R4)<4.0.

[0014] Further, the following relationship is satisfied among a combined focal length f23 of the second lens and the third lens, a maximum thickness CP1 of a first spacer element, a maximum thickness CP2 of the second spacer element, and a spacing distance EP12 between the first spacer element and the second spacer element along the optical axis direction: 3.5<f23 / (CP1+EP12+CP2)<7.8.

[0015] Further, the following relationship is satisfied among a refractive index N2 of the second lens, an Abbe number V3 of the third lens, a combined focal length f23 of the second lens and the third lens, and a spacing distance EP12 between the first spacer element and the second spacer element along the optical axis direction: 0<N2 / V3*f23 / EP12<1.3.

[0016] Further, the following relationship is satisfied between an outer diameter D0s of an object-side end surface of a lens barrel and an outer diameter D0m of an image-side end surface of the lens barrel: 4.5<D0s+D0m<5.5.

[0017] By applying the technical solution of the present invention, the camera lens assembly comprises a plurality of lenses, a plurality of spacer elements and a lens barrel, wherein the plurality of lenses comprise a first lens, a second lens and a third lens sequentially arranged from an object side to an image side of the camera lens assembly, and the object-side surface and the image-side surface of the third lens are each provided with an inflection point; among the plurality of spacer elements, the first spacer element is located at the image side of the first lens and is at least partially in contact with the image-side surface of the first lens, and among the plurality of spacer elements, the second spacer element is located at the image side of the second lens and is at least partially in contact with the image-side surface of the second lens; the lens barrel is configured to accommodate the plurality of lenses and the plurality of spacer elements; wherein a central thickness of the second lens on an optical axis of the camera lens assembly is the maximum value of central thicknesses of the plurality of lenses on the optical axis; the following relationship is satisfied between a maximum height L of the lens barrel and a central thickness CT2 of the second lens on the optical axis: 4.5<L / CT2<5.5; the following relationship is satisfied between an effective focal length f1 of the first lens and an effective focal length f2 of the second lens: 0<f1 / f2<1.0; the following relationship is satisfied among a curvature radius R2 of an image-side surface of the first lens, an inner diameter d1s of an object-side surface of the first spacer element, an inner diameter d2m of an image-side surface of the second spacer element, and a curvature radius R4 of an image-side surface of the second lens: 3.2<R2 / d1s*(d2m / R4)<5.5.

[0018] The present application provides a three-piece camera lens assembly. While having a large image height and a large field of view, the central thickness of the second lens is the largest among the three lenses, and when the overall size of the camera lens assembly satisfies 4.5<L / CT2<5.5, the problem of stray light will occur between the lenses. By controlling the effective focal length and radius of curvature of the first lens and the second lens, as well as the inner diameters of the first spacer element and the second spacer element, the shapes of the first lens and the second lens, especially the shape of the effective aperture area of the lenses, can be constrained, thereby adjusting the traveling path of light and reducing stray light incident on the effective aperture edges of the first lens and the second lens. In addition, the reasonable shape of the lens surface is conducive to processing and molding, reduces stray light generated due to defects on the lens surface, and can also adjust the direction of stray light reflected by the lens surface, reducing stray light transmitted to subsequent lenses. At the same time, the spacer elements are used to block the stray light incident on the structural part of the lens and the stray light reflected by the lens surface, preventing excess light from the preceding lens from incident into subsequent lenses, which improves the problems of transmitted stray light and internally reflected stray light between the first lens and the second lens, and enhances the imaging quality of the camera lens assembly. Description of Drawings

[0019] The accompanying drawings, which form a part of the present application, are provided to further understand the present invention. The schematic embodiments of the present invention and the description thereof are used to explain the present invention, and do not constitute an improper limitation to the present invention. In the drawings:

[0020] Figure 1 shows a structural schematic diagram of an optional embodiment of the camera lens assembly of the present invention;

[0021] Figure 2 shows a structural schematic diagram of the camera lens assembly according to Embodiment 1 of the present invention;

[0022] Figures 3 to 5 respectively show an axial chromatic aberration curve, an astigmatism curve and a lateral chromatic aberration curve of Embodiment 1 of the present invention;

[0023] Figure 6 shows a structural schematic diagram of the camera lens assembly according to Embodiment 2 of the present invention;

[0024] Figure 7 shows a structural schematic diagram of the camera lens assembly according to Embodiment 3 of the present invention;

[0025] Figure 8 shows a structural schematic diagram of the camera lens assembly according to Embodiment 4 of the present invention;

[0026] Figures 9 to 11 respectively show an axial chromatic aberration curve, an astigmatism curve and a lateral chromatic aberration curve of Embodiment 4 of the present invention;

[0027] Figure 12 shows a structural schematic diagram of the camera lens assembly according to Embodiment 5 of the present invention;

[0028] Figure 13 A schematic diagram of the camera lens assembly according to Embodiment Six of the present invention is shown;

[0029] Figure 14 A schematic diagram of the camera lens assembly according to Embodiment 7 of the present invention is shown;

[0030] Figures 15 to 17 The on-axis chromatic aberration curve, astigmatism curve, and magnification chromatic aberration curve of Embodiment 7 of the present invention are shown respectively.

[0031] Figure 18 A schematic diagram of the camera lens assembly according to Embodiment 8 of the present invention is shown;

[0032] Figure 19 A schematic diagram of the camera lens assembly according to Embodiment 9 of the present invention is shown;

[0033] Figure 20 A stray light energy diagram of a camera lens assembly according to an optional embodiment of the present invention is shown;

[0034] Figure 21 The stray light energy diagram of R2 / d1s*(d2m / R4) in a prior art camera lens assembly is shown when it is greater than 5.5;

[0035] Figure 22 The stray light energy diagram of R2 / d1s*(d2m / R4) in a prior art camera lens group is shown when it is less than 3.2.

[0036] The above figures include the following reference numerals:

[0037] P0, Lens tube; E1, First lens; S1, Object-side surface of the first lens; S2, Image-side surface of the first lens; P1, First spacer element; E2, Second lens; S3, Object-side surface of the second lens; S4, Image-side surface of the second lens; P2, Second spacer element; P2b, Second auxiliary spacer element; E3, Third lens; S5, Object-side surface of the third lens; S6, Image-side surface of the third lens. Detailed Implementation

[0038] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other. The present invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0039] It should be noted that, unless otherwise specified, all technical and scientific terms used in this application have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains.

[0040] In this invention, unless otherwise stated, directional terms such as "upper," "lower," "top," and "bottom" are generally used in relation to the direction shown in the accompanying drawings, or in relation to the vertical, perpendicular, or gravitational direction of the component itself; similarly, for ease of understanding and description, "inner" and "outer" refer to the inner and outer contours of each component itself, but the above directional terms are not intended to limit this invention.

[0041] It should be noted that in this specification, the terms "first," "second," "third," etc., are used only to distinguish one feature from another and do not imply any limitation on the features. Therefore, without departing from the teachings of this application, the first lens discussed below may also be referred to as the second lens or the third lens.

[0042] In the accompanying drawings, the thickness, size, and shape of the lenses have been slightly exaggerated for ease of illustration. Specifically, the shapes of the spherical or aspherical surfaces shown in the drawings are illustrated by way of example. That is, the shapes of the spherical or aspherical surfaces are not limited to those shown in the drawings. The drawings are for illustrative purposes only and are not drawn strictly to scale.

[0043] In this paper, the paraxial region refers to the region near the optical axis. If the lens surface is convex and the location of that convexity is not defined, it means that the lens surface is convex at least in the paraxial region; if the lens surface is concave and the location of that concaveness is not defined, it means that the lens surface is concave at least in the paraxial region. The determination of the surface shape in the paraxial region can be based on the judgment method commonly used by those knowledgeable in the field, using the R value (R refers to the radius of curvature of the paraxial region, usually the R value in the lens data in optical software) to determine convexity or concavity. For the object side, a positive R value indicates a convex surface, and a negative R value indicates a concave surface; for the image side, a positive R value indicates a concave surface, and a negative R value indicates a convex surface.

[0044] To address the problem of severe stray light at the front end of camera lens assemblies in existing technologies, this invention provides a camera lens assembly.

[0045] First Implementation Method

[0046] like Figures 1 to 20As shown, the camera lens assembly includes a plurality of lenses, a plurality of spacer elements, and a lens barrel. The plurality of lenses include a first lens, a second lens and a third lens arranged sequentially from the object side to the image side of the camera lens assembly, and the object side surface and the image side surface of the third lens each have one inflection point; among the plurality of spacer elements, the one located on the image side of the first lens and at least partially in contact with the image side surface of the first lens is a first spacer element, and among the plurality of spacer elements, the one located on the image side of the second lens and at least partially in contact with the image side surface of the second lens is a second spacer element; the lens barrel is configured to accommodate the plurality of lenses and the plurality of spacer elements; wherein, the central thickness of the second lens on the optical axis of the camera lens assembly is the maximum value among the central thicknesses of all the plurality of lenses on the optical axis; the maximum height L of the lens barrel and the central thickness CT2 of the second lens on the optical axis satisfy: 4.5 < L / CT2 < 5.5; the effective focal length f1 of the first lens and the effective focal length f2 of the second lens satisfy: 0 < f1 / f2 < 1.0; the radius of curvature R2 of the image side surface of the first lens, the inner diameter d1s of the object side surface of the first spacer element, the inner diameter d2m of the image side surface of the second spacer element, and the radius of curvature R4 of the image side surface of the second lens satisfy: 3.2 < R2 / d1s*(d2m / R4) < 5.5.

[0047] The present application provides a three-piece camera lens assembly. While having a large image height and a large field of view, the central thickness of the second lens is the largest among the three lenses, and when the overall size of the camera lens assembly satisfies 4.5 < L / CT2 < 5.5, a stray light problem occurs between the lenses. By controlling the effective focal lengths and curvature radii of the first lens and the second lens, as well as the inner diameters of the first spacer element and the second spacer element, the shapes of the first lens and the second lens, especially the shape of the effective diameter region of the lenses, can be constrained, thereby adjusting the traveling path of light, reducing stray light incident on the effective diameter edges of the first lens and the second lens. In addition, the reasonable shape of the lens surface is conducive to processing and molding, reducing stray light generated by lens surface defects, and can also adjust the direction of stray light reflected by the lens surface, reducing stray light transmitted to subsequent lenses. At the same time, the spacer elements are used to intercept stray light incident on the structural part of the lens and stray light reflected by the lens surface, preventing excess light from the front lens from entering subsequent lenses, which improves the problems of transmitted stray light and internal reflection stray light between the first lens and the second lens, and improves the imaging quality of the camera lens assembly.

[0048] In an optional embodiment, as Figure 20 shows the stray light energy of the camera lens assembly of this embodiment. With reference to Figure 21 shown, when R2 / d1s*(d2m / R4) is greater than 5.5, the internal reflection stray light energy of the camera lens assembly is relatively high. With reference to Figure 22 shown, when R2 / d1s*(d2m / R4) is less than 3.2, the internal reflection stray light energy of the camera lens assembly is relatively high. By comparison Figure 20The visible stray light is very little, and the stray light problem has been effectively improved.

[0049] This application also achieves increased image height and ensures the formation of a large field of view for the camera lens group by constraining the shapes of the first and second lenses and setting inversion points on the third lens.

[0050] In this embodiment, the outer diameter D1s of the object side of the first spacer element, the inner diameter d1s of the object side of the first spacer element, and the air gap T12 between the first lens and the second lens on the optical axis satisfy the following: 5.0 < (D1s - d1s) / T12 < 16.7. By limiting (D1s - d1s) / T12 to a reasonable range, stray light near the effective diameter edge that enters the second lens after being refracted by the first lens can be blocked, improving the stray light yield of the camera lens assembly; at the same time, it helps to control the air gap between the first lens and the second lens on the optical axis, reducing field sensitivity and improving the assembly yield of the camera lens assembly.

[0051] In this embodiment, the inner diameter d0s of the object-side end face of the lens barrel, the minimum aperture d0smin of the object-side end face of the lens barrel, the effective focal length f of the camera lens assembly, and the effective focal length f1 of the first lens satisfy the following condition: -7.0 < (d0s - d0smin) / (f - f1) < -4.8. By limiting (d0s - d0smin) / (f - f1) within a reasonable range, the bending angle of the light rays entering the second lens can be controlled, so that the light rays do not enter the inflection area of ​​the image side of the second lens as much as possible, avoiding stray light problems with the second lens and the second spacer element, thereby improving the imaging quality of the camera lens assembly.

[0052] In this embodiment, the radius of curvature R4 of the image-side surface of the second lens, the radius of curvature R3 of the object-side surface of the second lens, the inner diameter d2m of the image-side surface of the second spacer element, and the inner diameter d2s of the object-side surface of the second spacer element satisfy the following condition: 0.5 < (R4 / R3) / (d2m / d2s) < 1.5. By limiting (R4 / R3) / (d2m / d2s) within a reasonable range, the reflection angle of stray light emitted from the edge of the second lens and refracted onto the inner ring surface of the second spacer element can be adjusted. By roughening the scattering and refraction of the inner ring surface, the intensity of stray light is reduced, and the imaging quality of the camera lens assembly is improved.

[0053] In this embodiment, the effective focal length f2 of the second lens, the curvature radius R4 of the image-side surface of the second lens, the curvature radius R3 of the object-side surface of the second lens, and the inner diameter d2s of the object-side surface of the second spacer satisfy: -7.5mm < f2 / (R3+R4)*d2s < -1.5mm. By limiting f2 / (R3+R4)*d2s within a reasonable range, the angle of light exiting the second lens can be affected, and meanwhile, by affecting the inner diameter of the object-side surface of the second spacer, stray light formed at the inflection of the second lens by the exiting light can be blocked.

[0054] In this embodiment, the inner diameter d2m of the image-side surface of the second spacer and the effective semi-aperture DT31 of the object-side surface of the third lens satisfy: 1.5 < d2m / DT31 < 3.0. By limiting d2m / DT31 within a reasonable range, stray light entering the non-effective aperture portion of the third lens can be blocked, and the stray light performance of the camera lens assembly is improved.

[0055] In this embodiment, the spacing distance EP12 between the first spacer and the second spacer along the optical axis direction, the central thickness CT2 of the second lens on the optical axis, the on-axis distance SAG22 between the intersection point of the image-side surface of the second lens and the optical axis and the effective radius vertex of the image-side surface of the second lens, and the on-axis distance SAG21 between the intersection point of the object-side surface of the second lens and the optical axis and the effective radius vertex of the object-side surface of the second lens satisfy: 2.0 < EP12 / CT2 + (SAG22 / SAG21) < 3.5. By limiting EP12 / CT2 + (SAG22 / SAG21) within a reasonable range, the shape of the effective aperture portion of the second lens can be controlled, the overall thickness uniformity of the second lens can be further controlled, which is beneficial to the molding of the second lens.

[0056] In this embodiment, the outer diameter D2m of the image-side surface of the second spacer, the inner diameter d2m of the image-side surface of the second spacer, the curvature radius R5 of the object-side surface of the third lens, and the curvature radius R6 of the image-side surface of the third lens satisfy: 0 < (D2m-d2m) / (R5+R6) < 1.5. By limiting (D2m-d2m) / (R5+R6) within a reasonable range, incident light converges at the first lens, then passes through the second lens and the third lens in a divergent state and is transmitted to the image side. Reasonably controlling the inner diameter and outer diameter of the image-side surface of the second spacer enables the second spacer to effectively block stray light passing through the edge of the second spacer without affecting the chief ray of the incident light; reasonably controlling the curvature radii of the object-side surface and the image-side surface of the third lens can ensure that the chief ray in the incident light is transmitted along a predetermined route in the third lens, thereby improving the imaging quality of the camera lens assembly.

[0057] In this embodiment, the relationship among the maximum height L of the lens barrel, the effective focal length f of the camera lens group, and half of the maximum field of view Semi-FOV of the camera lens group satisfies: 1.9 < L / (f / tan(Semi-FOV)) < 2.5. Limiting L / (f / tan(Semi-FOV)) within a reasonable range is beneficial to matching the effective focal length of the camera lens group and the overall size of the camera lens group while ensuring a certain field of view of the camera lens group, thereby improving the imaging quality of the camera lens group.

[0058] In this embodiment, the relationship among the inner diameter d0m of the image-side end face of the lens barrel, the outer diameter D2s of the object-side surface of the second spacer element, the curvature radius R5 of the object-side surface of the third lens, and the curvature radius R4 of the image-side surface of the second lens satisfies: 0 < (d0m-D2s) / (R5+R4) < 4.0. By limiting (d0m-D2s) / (R5+R4) within a reasonable range, and by constraining the difference between the inner diameter of the image-side end face of the lens barrel and the outer diameter of the object-side surface of the second spacer element, the difference in the rear radial dimension of the camera lens group can be controlled within a reasonable range. The curvature radius of the image-side surface of the second lens and the curvature radius of the object-side surface of the third lens can control the shape of the third lens to a certain extent, which is beneficial to the molding of the third lens.

[0059] In this embodiment, the relationship among the combined focal length f23 of the second lens and the third lens, the maximum thickness CP1 of the first spacer element, the maximum thickness CP2 of the second spacer element, and the spacing distance EP12 between the first spacer element and the second spacer element along the optical axis direction satisfies: 3.5 < f23 / (CP1+EP12+CP2) < 7.8. By limiting f23 / (CP1+EP12+CP2) within a reasonable range, both the central thickness and the edge thickness of the second lens can be controlled within a reasonable range, which is beneficial to the molding of the second lens.

[0060] In this embodiment, the relationship among the refractive index N2 of the second lens, the Abbe number V3 of the third lens, the combined focal length f23 of the second lens and the third lens, and the spacing distance EP12 between the first spacer element and the second spacer element along the optical axis direction satisfies: 0 < N2 / V3*f23 / EP12 < 1.3. By limiting N2 / V3*f23 / EP12 within a reasonable range, the divergence degree of chief rays can be controlled through the refractive index of the second lens, and the dispersion degree of chief rays can be controlled through the high Abbe number of the third lens, so that imaging is clearer. In addition, controlling the combined focal length of the two lenses can also control the edge thickness of the first lens, which is beneficial to the molding of the first lens.

[0061] In this embodiment, the relationship between the outer diameter D0s of the object-side end face of the lens barrel and the outer diameter D0m of the image-side end face of the lens barrel satisfies: 4.5<D0s+D0m<5.5. By restricting D0s+D0m within a reasonable range, the step difference between the three lenses and the spacer element can be controlled, and the outer diameter dimensions of the object-side end face and the image-side end face of the lens barrel can be further controlled, so that the structure of the camera lens group is more compact.

[0062] 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 camera lens group in the present application may adopt a plurality of lenses, such as the three lenses mentioned above. By reasonably distributing the effective focal length, surface shape, central thickness of each lens, and on-axis distance between each lens, the aperture of the camera lens group can be effectively increased, the sensitivity of the lens can be reduced, and the processability of the lens can be improved, so that the camera lens group is more conducive to production and processing and can be applied to portable electronic devices such as smart phones.

[0063] In the present application, at least one of the mirror surfaces of each lens is an aspheric mirror surface. The aspheric lens is characterized in that: from the center of the lens to the periphery of the lens, the curvature changes continuously. Different from a spherical lens which has a constant curvature from the center of the lens to the periphery of the lens, an aspheric lens has better curvature radius characteristics, and has the advantages of improving distortion aberration and improving astigmatism aberration. By adopting an aspheric lens, the aberration occurring during imaging can be eliminated as much as possible, thereby improving the imaging quality.

[0064] 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 various results and advantages described in this specification. For example, although three lenses are described as an example in the embodiment, the camera lens group is not limited to including three lenses. If necessary, the camera lens group may also include other numbers of lenses.

[0065] Figure 1 A schematic structural view of a camera lens group of the present application is shown. Figure 1 Parameters such as d0s, D1s, and D2m are also marked therein, so as to understand the meaning of the parameters clearly and intuitively. In order to facilitate the presentation of the structure and specific surface shape of the camera lens group, when specific embodiments are described subsequently, these parameters will not be reflected in the drawings any more.

[0066] Where Dis refers to the outer diameter of the object-side surface of the i-th spacer element, dis refers to the inner diameter of the object-side surface of the i-th spacer element, Dim refers to the outer diameter of the image-side surface of the i-th spacer element, dim refers to the inner diameter of the image-side surface of the i-th spacer element, CPi refers to the maximum thickness of the i-th spacer element, which is also the maximum distance along the optical axis from the object-side surface to the image-side surface of the i-th spacer element, and EPij refers to the distance along the optical axis between the image-side surface of the i-th spacer element and the object-side surface of the j-th spacer element, where i and j are both positive integers greater than or equal to 1. d0s is the inner diameter of the object-side end face of the lens barrel, and D0m is the outer diameter of the image-side end face of the lens barrel. The maximum height L of the lens barrel P0 refers to the maximum distance along the optical axis from the object-side end face to the image-side end face of the lens barrel P0.

[0067] The following description, with reference to the accompanying drawings, further illustrates examples of the specific surface shape and parameters of the camera lens assembly applicable to the above embodiments.

[0068] It should be noted that any one of the following embodiments, from Embodiment 1 to Embodiment 9, is applicable to all implementation methods of this application.

[0069] Example 1

[0070] like Figures 2 to 5 As shown, a camera lens assembly according to Embodiment 1 of this application is described.

[0071] like Figure 2 As shown, the camera lens assembly, from the object side to the image side, includes a first lens E1, a first spacer element P1, a second lens E2, a second spacer element P2, a second auxiliary spacer element P2b, and a third lens E3 in sequence. Specifically, there are two spacers between the second and third lenses, and between each pair of adjacent lenses, to provide strong support and ensure sufficient bearing space in the radial direction.

[0072] like Figure 2 As shown, the object-side surface of the first lens is S1, the image-side surface of the first lens is S2, the object-side surface of the second lens is S3, the image-side surface of the second lens is S4, the object-side surface of the third lens is S5, and the image-side surface of the third lens is S6.

[0073] Table 1 shows the basic structural parameters of the camera lens assembly in Embodiment 1, where the units for radius of curvature, thickness / distance, and effective focal length are all millimeters (mm).

[0074] OBJ spherical infinity 23.0000 STO spherical infinity 0.0179 S1 aspherical 6.0660 0.1848 1.661 20.4 0.0000 S2 aspherical -0.6003 0.0925 2.0410 S3 aspherical -0.2595 0.2214 1.661 20.4 -0.4298 S4 aspherical -0.3104 0.0360 -0.3148 S5 aspherical 0.4234 0.1782 1.661 20.4 -0.5872 S6 aspherical 0.3878 0.1500 -5.4029 S7 spherical infinity 0.1100 1.517 64.2 S8 spherical infinity 0.0950 S9 spherical infinity 0.1500 1.517 64.2 S10 spherical infinity 0.1167 S11 spherical infinity

[0075] Table 1

[0076] Table 1 also shows the object side surface S7 of the filter, the image side surface S8 of the filter, the object side surface S9 of the protective glass, the image side surface S10 of the protective glass, and the imaging surface S11.

[0077] In this embodiment, the object-side and image-side surfaces of the first to third lenses are both aspherical. The surface shape of each aspherical lens can be defined using, but is not limited to, the following aspherical formula:

[0078]

[0079] Where z is the depth of the aspherical surface (the perpendicular distance between a point on the aspherical surface at a distance y from the optical axis and a plane tangent to the vertex of the aspherical surface on the optical axis); c is the curvature of the vertex of the aspherical surface; and K is the cone coefficient. The radial distance is u; u is r / r n ;r n The normalized radius; a m Here are the coefficients of the m-th order Qcon; Qcon is the m-th order Qcon polynomial. Table 2 below gives the higher-order coefficients A0, A1, A2, A3, A4, A5, A6, A7, and A8 that can be used for each aspherical mirror in this embodiment.

[0080]

[0081] Table 2

[0082] Figure 3 The on-axis chromatic aberration curve of the camera lens assembly in Embodiment 1 is shown, representing the deflection of the focal point after light of different wavelengths passes through the camera lens assembly. Figure 3 It can be seen that the camera lens group in this embodiment is used in the infrared band, preferably in the 930-950nm band. Figure 4 The astigmatism curves of the camera lens assembly in Embodiment 1 are shown, representing the meridional image plane curvature and the sagittal image plane curvature. Figure 5 The magnification chromatic aberration curve of the camera lens group in Embodiment 1 is shown, which represents the deviation of light at different image heights on the imaging plane after passing through the camera lens group.

[0083] according to Figures 3 to 5 As can be seen, the camera lens assembly given in Example 1 can achieve good imaging quality.

[0084] Example 2

[0085] The difference from Embodiment 1 is that the parameters of the lens barrel P0 and the spacer element are different.

[0086] like Figure 6 The image shows a camera lens assembly according to Embodiment 2 of this application. For the sake of brevity, descriptions similar to those in Embodiment 1 are omitted.

[0087] In Embodiment 2, the curvature radius, center thickness, and other parameters of the first to third lenses of the camera lens assembly are the same as in Embodiment 1, as are the inter-lens spacing and higher-order image coefficients, as shown in Tables 1 and 2. However, the parameters such as the lens barrel P0, the thickness of the spacer element, the inner diameter and outer diameter of the spacer element, and the distance between the spacer elements are different. In other words, the main structure used for imaging is the same, but the auxiliary structures used for imaging are different. Therefore, the imaging quality of the camera lens assembly in this embodiment is as follows: Figures 3 to 5 As shown.

[0088] like Figure 6 As shown, the object-side and image-side of the second spacer element abut against the second lens and the third lens, respectively, without any auxiliary spacer elements. The first lens and the second lens have structural portions that directly abut against each other, and at least a portion of them are in contact with the first spacer element.

[0089] Example 3

[0090] The difference from Embodiment 1 is that the parameters of the lens barrel P0 and the spacer element are different.

[0091] like Figure 7 The image shows a camera lens assembly according to Embodiment 3 of this application. For the sake of brevity, descriptions similar to those in Embodiment 1 are omitted.

[0092] In Embodiment 3, the curvature radius, center thickness, and other parameters of the first to third lenses of the camera lens assembly are the same as those in Embodiment 1, as are the spacing distance between the lenses and the higher-order image coefficients, as shown in Tables 1 and 2. However, the parameters such as the lens barrel P0, the thickness of the spacer element, the inner diameter and outer diameter of the spacer element, and the distance between the spacer elements are different. In other words, the main structure used for imaging is the same, but the auxiliary structures used for imaging are different. Therefore, the imaging quality of the camera lens assembly in this embodiment is as follows: Figures 3 to 5 As shown.

[0093] like Figure 7 As shown, the object-side and image-side of the second spacer element abut against the second lens and the third lens, respectively, without any auxiliary spacer elements. The first lens and the second lens have structural portions that directly abut against each other, and at least a portion of them are in contact with the first spacer element.

[0094] Example 4

[0095] The difference from Embodiment 1 is that the parameters of the lens barrel P0, the spacer element, and the lens are different.

[0096] like Figures 8 to 11 The image shows a camera lens assembly according to Embodiment 4 of this application. For the sake of brevity, descriptions similar to those in Embodiment 1 are omitted.

[0097] like Figure 8 As shown, the camera lens assembly, from the object side to the image side, includes a first lens E1, a first spacer element P1, a second lens E2, a second spacer element P2, a second auxiliary spacer element P2b, and a third lens E3 in sequence. Specifically, there are two spacers between the second and third lenses, and between each pair of adjacent lenses, to provide strong support and ensure sufficient bearing space in the radial direction.

[0098] like Figure 8 As shown, the object-side surface of the first lens is S1, the image-side surface of the first lens is S2, the object-side surface of the second lens is S3, the image-side surface of the second lens is S4, the object-side surface of the third lens is S5, and the image-side surface of the third lens is S6.

[0099] Table 3 shows the basic structural parameters of the camera lens assembly in Embodiment 4, where the units for radius of curvature, thickness / distance, and effective focal length are all millimeters (mm).

[0100]

[0101]

[0102] Table 3

[0103] Table 3 also shows the object side surface S7 of the filter, the image side surface S8 of the filter, the object side surface S9 of the protective glass, the image side surface S10 of the protective glass, and the imaging surface S11.

[0104] In this embodiment, the object-side surface and image-side surface of the first to third lenses are both aspherical, and the surface shape of each aspherical lens can be defined by, but is not limited to, the formula (1) in Embodiment 1.

[0105] Table 4 provides the higher-order coefficients that can be used for each aspherical mirror in this embodiment.

[0106]

[0107] Table 4

[0108] Figure 9 The on-axis chromatic aberration curve of the camera lens assembly in Embodiment 4 is shown, representing the deflection of the focal point after light of different wavelengths passes through the camera lens assembly. Figure 9 It can be seen that the camera lens group in this embodiment is used in the infrared band, preferably in the 930-950nm band. Figure 10 The astigmatism curves of the camera lens assembly in Embodiment 4 are shown, representing the meridional image plane curvature and the sagittal image plane curvature. Figure 11 The magnification chromatic aberration curve of the camera lens assembly in Embodiment 4 is shown, which represents the deviation of light at different image heights on the imaging plane after passing through the camera lens assembly.

[0109] according to Figures 9 to 11 It can be seen that the camera lens assembly given in Example 4 can achieve good imaging quality.

[0110] Example 5

[0111] The difference from Embodiment 4 is that the parameters of the lens barrel P0 and the spacer element are different.

[0112] like Figure 12 The image shows a camera lens assembly according to Embodiment 5 of this application. For the sake of brevity, descriptions similar to those in Embodiment 1 are omitted.

[0113] In Embodiment 5 and Embodiment 4, the curvature radius, center thickness, and other parameters of the first to third lenses of the camera lens assembly, as well as the spacing between the lenses and the higher-order image coefficients, are the same, as shown in Tables 3 and 4. However, the parameters such as the lens barrel P0, the thickness of the spacer element, the inner diameter and outer diameter of the spacer element, and the distance between the spacer elements are different. In other words, the main structure used for imaging is the same, but the auxiliary structures used for imaging are different. Therefore, the imaging quality of the camera lens assembly in this embodiment is as follows: Figures 9 to 11 As shown.

[0114] like Figure 12 As shown, the object-side and image-side of the second spacer element abut against the second lens and the third lens, respectively, without any auxiliary spacer elements. The first lens and the second lens have structural portions that directly abut against each other, and at least a portion of them are in contact with the first spacer element.

[0115] Example 6

[0116] The difference from Embodiment 4 is that the parameters of the lens barrel P0 and the spacer element are different.

[0117] like Figure 13 The image shows a camera lens assembly according to Embodiment Six of this application. For the sake of brevity, descriptions similar to those in Embodiment One are omitted.

[0118] In Embodiment Six and Embodiment Four, the curvature radius, center thickness, and other parameters of the first to third lenses of the camera lens assembly, as well as the spacing between the lenses and the higher-order image coefficients, are the same, as shown in Tables 3 and 4. However, the parameters such as the lens barrel P0, the thickness of the spacer element, the inner diameter and outer diameter of the spacer element, and the distance between the spacer elements are different. In other words, the main structure used for imaging is the same, but the auxiliary structures used for imaging are different. Therefore, the imaging quality of the camera lens assembly in this embodiment is as follows: Figures 9 to 11 As shown.

[0119] like Figure 13As shown, the object-side and image-side of the second spacer element abut against the second lens and the third lens, respectively, without any auxiliary spacer elements. The first lens and the second lens have structural portions that directly abut against each other, and at least a portion of them are in contact with the first spacer element.

[0120] Example 7

[0121] The difference from Embodiment 1 is that the parameters of the lens barrel P0, the spacer element, and the lens are different.

[0122] like Figures 14 to 17 The image shows a camera lens assembly according to Embodiment Seven of this application. For the sake of brevity, descriptions similar to those in Embodiment One are omitted.

[0123] like Figure 14 As shown, the camera lens assembly, from the object side to the image side, includes a first lens E1, a first spacer element P1, a second lens E2, a second spacer element P2, a second auxiliary spacer element P2b, and a third lens E3 in sequence. Specifically, there are two spacers between the second and third lenses, and between each pair of adjacent lenses, to provide strong support and ensure sufficient bearing space in the radial direction.

[0124] like Figure 14 As shown, the object-side surface of the first lens is S1, the image-side surface of the first lens is S2, the object-side surface of the second lens is S3, the image-side surface of the second lens is S4, the object-side surface of the third lens is S5, and the image-side surface of the third lens is S6.

[0125] Table 5 shows the basic structural parameters of the camera lens assembly in Embodiment 7, where the units for radius of curvature, thickness / distance, and effective focal length are all millimeters (mm).

[0126]

[0127]

[0128] Table 5

[0129] Table 5 also shows the object side surface S7 of the filter, the image side surface S8 of the filter, the object side surface S9 of the protective glass, the image side surface S10 of the protective glass, and the imaging surface S11.

[0130] In this embodiment, the object-side surface and image-side surface of the first to third lenses are both aspherical, and the surface shape of each aspherical lens can be defined by, but is not limited to, the formula (1) in Embodiment 1.

[0131] Table 6 provides the higher-order coefficients that can be used for each aspherical mirror in this embodiment.

[0132]

[0133] Table 6

[0134] Figure 15 The on-axis chromatic aberration curve of the camera lens assembly in Embodiment 7 is shown, representing the deflection of the focal point after light of different wavelengths passes through the camera lens assembly. Figure 15 It can be seen that the camera lens group in this embodiment is used in the infrared band, preferably in the 930-950nm band. Figure 16 The astigmatism curves of the camera lens assembly in Embodiment 7 are shown, representing the meridional image plane curvature and the sagittal image plane curvature. Figure 17 The magnification chromatic aberration curve of the camera lens group in Embodiment 7 is shown, which represents the deviation of light at different image heights on the imaging plane after passing through the camera lens group.

[0135] according to Figures 15 to 17 It can be seen that the camera lens assembly given in Example 7 can achieve good imaging quality.

[0136] Example 8

[0137] The difference from Embodiment 7 is that the parameters of the lens barrel P0 and the spacer element are different.

[0138] like Figure 18 The image shows a camera lens assembly according to Embodiment Eight of this application. For the sake of brevity, descriptions similar to those in Embodiment One are omitted.

[0139] In Embodiment 8 and Embodiment 7, the curvature radius, center thickness, and other parameters of the first to third lenses of the camera lens assembly, as well as the spacing between the lenses and the higher-order image coefficients, are the same, as shown in Tables 5 and 6. However, the parameters such as the lens barrel P0, the thickness of the spacer element, the inner diameter and outer diameter of the spacer element, and the distance between the spacer elements are different. In other words, the main structure used for imaging is the same, but the auxiliary structures used for imaging are different. Therefore, the imaging quality of the camera lens assembly in this embodiment is as follows: Figures 15 to 17 As shown.

[0140] like Figure 18 As shown, the object-side and image-side of the second spacer element abut against the second lens and the third lens, respectively, without any auxiliary spacer elements. The first lens and the second lens have structural portions that directly abut against each other, and at least a portion of them are in contact with the first spacer element.

[0141] Example 9

[0142] The difference from Embodiment 7 is that the parameters of the lens barrel P0 and the spacer element are different.

[0143] like Figure 19 The image shows a camera lens assembly according to Embodiment Nine of this application. For the sake of brevity, descriptions similar to those in Embodiment One are omitted.

[0144] In Embodiment 9 and Embodiment 7, the curvature radius, center thickness, and other parameters of the first to third lenses of the camera lens assembly, as well as the spacing between the lenses and the higher-order image coefficients, are the same, as shown in Tables 5 and 6. However, the parameters such as the lens barrel P0, the thickness of the spacer element, the inner diameter and outer diameter of the spacer element, and the distance between the spacer elements are different. In other words, the main structure used for imaging is the same, but the auxiliary structures used for imaging are different. Therefore, the imaging quality of the camera lens assembly in this embodiment is as follows: Figures 15 to 17 As shown.

[0145] like Figure 19 As shown, the object-side and image-side of the second spacer element abut against the second lens and the third lens, respectively, without any auxiliary spacer elements. The first lens and the second lens have structural portions that directly abut against each other, and at least a portion of them are in contact with the first spacer element.

[0146] In summary, Examples 1 to 9 satisfy the relationships shown in Table 7.

[0147]

[0148]

[0149] Table 7

[0150] Table 8 provides some parameters of the camera lens assemblies in Examples 1 to 9.

[0151] d1s 0.574 0.542 0.540 0.640 0.645 0.645 0.602 0.603 0.618 D1s 2.100 1.044 1.054 1.884 1.121 1.121 1.910 1.132 1.147 d2s 1.111 0.946 1.074 1.095 0.935 1.318 1.163 0.961 1.219 d2m 1.075 0.946 1.022 1.316 0.935 1.234 1.192 0.961 0.969 D2s 2.033 2.049 1.846 1.573 1.995 1.583 1.599 2.021 1.960 D2m 2.119 2.049 1.930 1.727 1.995 1.623 1.691 2.021 1.928 d0s 1.132 1.103 1.116 1.083 1.074 1.083 1.100 1.100 1.109 d0m 2.452 2.201 2.214 2.227 2.127 2.227 2.252 2.152 2.252 D0s 2.559 2.162 2.174 2.279 2.279 2.279 2.305 2.305 2.405 D0m 2.778 2.528 2.540 2.561 2.461 2.561 2.587 2.487 2.449 CP1 0.018 0.018 0.018 0.018 0.018 0.018 0.018 0.018 0.018 EP12 0.161 0.233 0.233 0.125 0.325 0.204 0.167 0.361 0.188 CP2 0.222 0.018 0.165 0.212 0.018 0.176 0.212 0.018 0.188 L 1.080 1.080 1.080 1.104 1.104 1.104 1.099 1.099 1.099 d0smin 0.367 0.338 0.350 0.297 0.297 0.297 0.323 0.323 0.323

[0152] Table 8

[0153] Table 9 shows the effective focal lengths of the first to third lenses of the camera lens assemblies in Embodiments 1 to 9.

[0154] Semi-FOV 56.09 56.09 56.09 52.58 52.58 52.58 53.45 53.45 53.45 f 0.72 0.72 0.72 0.66 0.66 0.66 0.71 0.71 0.71 f1 0.87 0.87 0.87 0.77 0.77 0.77 0.86 0.86 0.86 f2 3.64 3.64 3.64 0.82 0.82 0.82 1.26 1.26 1.26 f3 7.75 7.75 7.75 -1.97 -1.97 -1.97 -2.86 -2.86 -2.86

[0155] Table 9

[0156] This application also provides an imaging device, whose electronic photosensitive element can be a photocoupled device (CCD) or a complementary metal oxide semiconductor device (CMOS). The imaging device can be a stand-alone imaging device such as a digital camera, or an imaging module integrated into a mobile electronic device such as a mobile phone. The imaging device is equipped with the camera lens group described above.

[0157] Obviously, the embodiments described above are merely some, not all, embodiments of the present invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort should fall within the scope of protection of the present invention.

[0158] It should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the exemplary embodiments according to this application. As used herein, the singular form is intended to include the plural form as well, unless the context clearly indicates otherwise. Furthermore, it should be understood that when the terms "comprising" and / or "including" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof.

[0159] It should be noted that the terms "first," "second," etc., used in the specification, claims, and accompanying drawings of this application are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate so that the embodiments of this application described herein can be implemented in sequences other than those illustrated or described herein.

[0160] The above description is merely a preferred embodiment of the present invention and is not intended to limit the invention. Various modifications and variations can be made to the present invention by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. A camera lens assembly, characterized in that, The camera lens assembly has three lenses with optical power, including: The system includes multiple lenses, including a first lens, a second lens, and a third lens arranged sequentially from the object side to the image side of the camera lens assembly. The first lens has positive optical power, and both its object side and image side are convex. The second lens has positive optical power, and both its object side and image side are concave. The third lens has a convex object side and a concave image side. Each of the object side and image side of the third lens has a point of inflection. A plurality of spacer elements, wherein the spacer element located on the image side of the first lens and in at least partial contact with the image side surface of the first lens is the first spacer element, and the spacer element located on the image side of the second lens and in at least partial contact with the image side surface of the second lens is the second spacer element; A lens barrel for housing the plurality of lenses and the plurality of spacer elements; Wherein, the center thickness of the second lens on the optical axis of the camera lens group is the maximum value among the center thicknesses of all the plurality of lenses on the optical axis; The maximum height L of the lens barrel and the center thickness CT2 of the second lens on the optical axis satisfy the following condition: 4.5 <L / CT2<5.5; The effective focal length f1 of the first lens and the effective focal length f2 of the second lens satisfy the following condition: 0 <f1 / f2<1.0; The radius of curvature R2 of the image-side surface of the first lens, the inner diameter d1s of the object-side surface of the first spacer element, the inner diameter d2m of the image-side surface of the second spacer element, and the radius of curvature R4 of the image-side surface of the second lens satisfy the following relationship: 3.2 <R2 / d1s*(d2m / R4)<5.5。 2. The camera lens assembly according to claim 1, characterized in that, The outer diameter D1s of the object side of the first spacer element, the inner diameter d1s of the object side of the first spacer element, and the air gap T12 between the first lens and the second lens on the optical axis satisfy the following: 5.0 < (D1s - d1s) / T12 < 16.

7.

3. The camera lens assembly according to claim 1, characterized in that, The inner diameter d0s of the object-side end face of the lens barrel, the minimum opening diameter d0smin of the object-side of the lens barrel, the effective focal length f of the camera lens group, and the effective focal length f1 of the first lens satisfy the following condition: -7.0 < (d0s - d0smin) / (f - f1) < -4.

8.

4. The camera lens assembly according to claim 1, characterized in that, The radius of curvature R4 of the image side of the second lens, the radius of curvature R3 of the object side of the second lens, the inner diameter d2m of the image side of the second spacer element, and the inner diameter d2s of the object side of the second spacer element satisfy the following condition: 0.5 < (R4 / R3) / (d2m / d2s) < 1.

5.

5. The camera lens assembly according to claim 1, characterized in that, The effective focal length f2 of the second lens, the radius of curvature R4 of the image-side surface of the second lens, the radius of curvature R3 of the object-side surface of the second lens, and the inner diameter d2s of the object-side surface of the second spacer element satisfy the following condition: -7.5mm. <f2 / (R3+R4)*d2s<-1.5mm。 6. The camera lens assembly according to claim 1, characterized in that, The inner diameter d2m of the image side of the second spacer element and the effective half-aperture DT31 of the object side of the third lens satisfy the following relationship: 1.5 <d2m / DT31<3.0。 7. The camera lens assembly according to claim 1, characterized in that, The following satisfy the following conditions: the spacing distance EP12 between the first and second spacer elements along the optical axis; the center thickness CT2 of the second lens along the optical axis; the axial distance SAG22 between the intersection of the image-side surface of the second lens and the optical axis and the vertex of the effective radius of the image-side surface of the second lens; and the axial distance SAG21 between the intersection of the object-side surface of the second lens and the optical axis and the vertex of the effective radius of the object-side surface of the second lens. <EP12 / CT2+(SAG22 / SAG21)<3.5。 8. The camera lens assembly according to claim 1, characterized in that, The outer diameter D2m of the image side of the second spacer element, the inner diameter d2m of the image side of the second spacer element, the radius of curvature R5 of the object side of the third lens, and the radius of curvature R6 of the image side of the third lens satisfy the following condition: 0 < (D2m - d2m) / (R5 + R6) < 1.

5.

9. The camera lens assembly according to claim 1, characterized in that, The maximum height L of the lens barrel, the effective focal length f of the camera lens group, and half of the maximum field of view (Semi-FOV) of the camera lens group satisfy the following condition: 1.9 <L / (f / tan(Semi-FOV))<2.5。 10. The camera lens assembly according to claim 1, characterized in that, The inner diameter d0m of the image-side end face of the lens barrel, the outer diameter D2s of the object-side surface of the second spacer element, the radius of curvature R5 of the object-side surface of the third lens, and the radius of curvature R4 of the image-side surface of the second lens satisfy the following condition: 0 < (d0m - D2s) / (R5 + R4) < 4.

0.

11. The camera lens assembly according to claim 1, characterized in that, The combined focal length f23 of the second and third lenses, the maximum thickness CP1 of the first spacer element, the maximum thickness CP2 of the second spacer element, and the spacing EP12 between the first and second spacer elements along the optical axis satisfy the following condition: 3.

5. <f23 / (CP1+EP12+CP2)<7.8。 12. The camera lens assembly according to any one of claims 1 to 11, characterized in that, The refractive index N2 of the second lens, the Abbe number V3 of the third lens, the combined focal length f23 of the second and third lenses, and the spacing EP12 between the first and second spacers along the optical axis satisfy the following: 0 <N2 / V3*f23 / EP12<1.3。 13. The camera lens assembly according to any one of claims 1 to 11, characterized in that, The outer diameter D0s of the object-side end face of the lens barrel and the outer diameter D0m of the image-side end face of the lens barrel satisfy the following condition: 4.5 <D0s+D0m<5.5。

Images