Camera lens

Abstract

The present invention provides a camera lens comprising, in order from the object side to the image side, a first lens; a second lens; a third lens having negative optical power; a fourth lens having negative optical power; a fifth lens; and a sixth lens, wherein the object-side surface of the sixth lens is concave and the image-side surface of the sixth lens is concave. The aperture value Fno of the camera lens satisfies the following: Fno < 1.7; and the effective focal length f of the camera lens, the effective focal length f2 of the second lens, and the effective focal length f3 of the third lens satisfy the following: -7 < (f3 / f) + (f2 / f) < -5. The present invention solves the problem of poor nighttime image quality in existing camera lenses.

Description

Technical Field

[0001] The present invention relates to the technical field of camera equipment, and in particular to a camera lens. Background Art

[0002] The current mobile phone market's camera requirements are constantly increasing. Mainstream flagship phones often feature six or seven lenses in their main cameras, a trend that will continue to evolve in high-end camera phones. The greater the number of lenses, the greater the ability of the lens to focus light, significantly improving its resolution and contrast. However, a larger number of lenses significantly increases the likelihood of aberrations and limits lens structure. Increasing the number of lenses also increases the offset of the optical axis, reducing manufacturing yield and increasing production costs. The assembly process and subsequent adjustments of lenses with too many lenses are also very difficult, significantly impacting the image quality during the assembly process.

[0003] Night photography is also a hot topic in the current mobile phone market. Large-aperture lenses allow users to capture images even in low-light conditions using the available light, ensuring high-quality images. They also create a shallow depth of field, blending virtual and real elements. Therefore, large-aperture lenses play a crucial role in improving image quality.

[0004] That is to say, the camera lens in the prior art has the problem of poor image quality when shooting at night. Summary of the Invention

[0005] The main purpose of the present invention is to provide a camera lens to solve the problem of poor imaging quality of camera lenses used in the prior art for nighttime shooting.

[0006] To achieve the above-mentioned object, according to one aspect of the present invention, there is provided a camera lens, which comprises, in order from the object side to the image side of the camera lens: a first lens; a second lens; a third lens having negative optical power; a fourth lens having negative optical power; a fifth lens; a sixth lens, the object-side surface of the sixth lens being a concave surface, and the image-side surface of the sixth lens being a concave surface; wherein the aperture value Fno of the camera lens satisfies: Fno<1.7; and the effective focal length f of the camera lens, the effective focal length f2 of the second lens, and the effective focal length f3 of the third lens satisfy: -8<(f3 / f)+(f2 / f)<-5.

[0007] Furthermore, the maximum half field of view Semi-FOV of the camera lens, half the diagonal length of the effective pixel area on the imaging plane of the camera lens ImgH, the effective focal length f3 of the third lens and the effective focal length f4 of the fourth lens satisfy the following: -18<(f3+f4) / (ImgH*tan(Semi-FOV))<-12.

[0008] Furthermore, the maximum half field angle Semi-FOV of the camera lens, the axial distance SL from the aperture of the camera lens to the imaging surface of the camera lens, and the entrance pupil diameter EPD of the camera lens satisfy the following conditions: 1.5 <SL / EPD*tan(Semi-FOV)<1.8。

[0009] Furthermore, the on-axis distance TTL from the object side of the first lens to the imaging surface of the camera lens, the aperture value Fno of the camera lens, and the on-axis distance BFL from the image side of the sixth lens to the imaging surface of the camera lens satisfy the following conditions: <TTL / BFL / Fno<4。

[0010] Furthermore, a curvature radius R1 of the object-side surface of the first lens and a curvature radius R2 of the image-side surface of the first lens satisfy the following relationship: 1<(R1+R2) / (R2-R1)<2.

[0011] Furthermore, the curvature radius R1 of the object side surface of the first lens, the curvature radius R2 of the image side surface of the first lens and the effective focal length f1 of the first lens satisfy the following relationship: 0.4 <f1 / (R2-R1)<1。

[0012] Furthermore, a curvature radius R3 of the object-side surface of the second lens, a curvature radius R4 of the image-side surface of the second lens, a curvature radius R7 of the object-side surface of the fourth lens, and a curvature radius R8 of the image-side surface of the fourth lens satisfy the following relationship: 0.7<(R3+R4) / (R7+R8)<1.

[0013] Furthermore, the on-axis distance TTL from the object side surface of the first lens to the imaging surface of the camera lens, the on-axis distance BFL from the image side surface of the sixth lens to the imaging surface of the camera lens, and the on-axis distance Tr9r12 from the object side surface of the fifth lens to the image side surface of the sixth lens satisfy the following relationship: 0.45<(Tr9r12+BFL) / TTL<0.55.

[0014] Furthermore, the center thickness CT1 of the first lens and the center thickness CT5 of the fifth lens satisfy: 0.8 <CT1 / CT5<1.2。

[0015] Furthermore, the center thickness CT1 of the first lens, the center thickness CT6 of the sixth lens, the edge thickness ET1 of the first lens, and the edge thickness ET6 of the sixth lens satisfy the following relationship: 0.7<(ET1 / CT1) / (CT6 / ET6)<1.

[0016] Furthermore, an on-axis distance TD from the object-side surface of the first lens to the image-side surface of the sixth lens and a sum ΣET of edge thicknesses of the first to sixth lenses on the optical axis of the camera lens satisfy the following relationship: 0.7<ΣET / TD<0.9.

[0017] Furthermore, the center thickness CT2 of the second lens on the optical axis of the camera lens, the center thickness CT3 of the third lens on the optical axis of the camera lens, and the distance T23 of the air gap between the second lens and the third lens on the optical axis of the camera lens satisfy the following conditions: 1 <T23 / (CT2+CT3)≤1.1。

[0018] Furthermore, the on-axis distance SAG61 between the intersection of the object side surface of the sixth lens and the optical axis of the camera lens to the effective radius vertex of the object side surface of the sixth lens, and the on-axis distance SAG62 between the intersection of the image side surface of the sixth lens and the optical axis of the camera lens to the effective radius vertex of the image side surface of the sixth lens satisfy: 1≤SAG61 / SAG62<2.

[0019] Furthermore, the Abbe numbers of four of the six lenses of the camera lens are greater than 50.

[0020] Furthermore, the camera lens also includes an aperture, which is located on the object side of the first lens. The object side surface of the first lens is convex, and the first lens is a meniscus lens; the object side surface of the second lens is convex, and the second lens is a meniscus lens.

[0021] According to another aspect of the present invention, a camera lens is provided, which includes, in sequence from the object side to the image side of the camera lens: a first lens; a second lens; a third lens, the third lens having negative optical power; a fourth lens, the fourth lens having negative optical power; a fifth lens; a sixth lens, the object side surface of the sixth lens being a concave surface, and the image side surface of the sixth lens being a concave surface; wherein the aperture value Fno of the camera lens satisfies: Fno<1.7; the maximum half field of view Semi-FOV of the camera lens, half the diagonal length of the effective pixel area on the imaging surface of the camera lens ImgH, and the effective focal length f3 of the third lens and the effective focal length f4 of the fourth lens satisfy: -18<(f3+f4) / (ImgH*tan(Semi-FOV))<-12.

[0022] Furthermore, the maximum half field angle Semi-FOV of the camera lens, the axial distance SL from the aperture of the camera lens to the imaging surface of the camera lens, and the entrance pupil diameter EPD of the camera lens satisfy the following conditions: 1.5 <SL / EPD*tan(Semi-FOV)<1.8。

[0023] Furthermore, the on-axis distance TTL from the object side of the first lens to the imaging surface of the camera lens, the aperture value Fno of the camera lens, and the on-axis distance BFL from the image side of the sixth lens to the imaging surface of the camera lens satisfy the following conditions: <TTL / BFL / Fno<4。

[0024] Furthermore, a curvature radius R1 of the object-side surface of the first lens and a curvature radius R2 of the image-side surface of the first lens satisfy the following relationship: 1<(R1+R2) / (R2-R1)<2.

[0025] Furthermore, the curvature radius R1 of the object side surface of the first lens, the curvature radius R2 of the image side surface of the first lens and the effective focal length f1 of the first lens satisfy the following relationship: 0.4 <f1 / (R2-R1)<1。

[0026] Furthermore, a curvature radius R3 of the object-side surface of the second lens, a curvature radius R4 of the image-side surface of the second lens, a curvature radius R7 of the object-side surface of the fourth lens, and a curvature radius R8 of the image-side surface of the fourth lens satisfy the following relationship: 0.7<(R3+R4) / (R7+R8)<1.

[0027] Furthermore, the on-axis distance TTL from the object side surface of the first lens to the imaging surface of the camera lens, the on-axis distance BFL from the image side surface of the sixth lens to the imaging surface of the camera lens, and the on-axis distance Tr9r12 from the object side surface of the fifth lens to the image side surface of the sixth lens satisfy the following relationship: 0.45<(Tr9r12+BFL) / TTL<0.55.

[0028] Furthermore, the center thickness CT1 of the first lens and the center thickness CT5 of the fifth lens satisfy: 0.8 <CT1 / CT5<1.2。

[0029] Furthermore, the center thickness CT1 of the first lens, the center thickness CT6 of the sixth lens, the edge thickness ET1 of the first lens, and the edge thickness ET6 of the sixth lens satisfy the following relationship: 0.7<(ET1 / CT1) / (CT6 / ET6)<1.

[0030] Furthermore, an on-axis distance TD from the object-side surface of the first lens to the image-side surface of the sixth lens and a sum ΣET of edge thicknesses of the first to sixth lenses on the optical axis of the camera lens satisfy the following relationship: 0.7<ΣET / TD<0.9.

[0031] Furthermore, the center thickness CT2 of the second lens on the optical axis of the camera lens, the center thickness CT3 of the third lens on the optical axis of the camera lens, and the distance T23 of the air gap between the second lens and the third lens on the optical axis of the camera lens satisfy the following conditions: 1 <T23 / (CT2+CT3)≤1.1。

[0032] Furthermore, the on-axis distance SAG61 between the intersection of the object side surface of the sixth lens and the optical axis of the camera lens to the effective radius vertex of the object side surface of the sixth lens, and the on-axis distance SAG62 between the intersection of the image side surface of the sixth lens and the optical axis of the camera lens to the effective radius vertex of the image side surface of the sixth lens satisfy: 1≤SAG61 / SAG62<2.

[0033] Furthermore, the Abbe numbers of four of the six lenses of the camera lens are greater than 50.

[0034] Furthermore, the camera lens also includes an aperture, which is located on the object side of the first lens. The object side surface of the first lens is convex, and the first lens is a meniscus lens; the object side surface of the second lens is convex, and the second lens is a meniscus lens.

[0035] By applying the technical solution of the present invention, the camera lens includes, from the object side to the image side, a first lens, a second lens, a third lens, a fourth lens, a fifth lens, and a sixth lens, wherein the third lens has negative optical power; the fourth lens has negative optical power; the object-side surface of the sixth lens is concave, and the image-side surface of the sixth lens is concave; wherein the aperture value Fno of the camera lens satisfies: Fno<1.7; and the effective focal length f of the camera lens, the effective focal length f2 of the second lens, and the effective focal length f3 of the third lens satisfy: -7<(f3 / f)+(f2 / f)<-5.

[0036] By controlling the object side and image side of the sixth lens to be concave, the image height of the camera lens on the imaging surface can be increased. By controlling the optical focal length of the third lens and the fourth lens to be negative, it is beneficial to balance the aberrations generated by the camera lens and improve the imaging quality of the camera lens. By controlling the aperture value Fno of the camera lens to be less than 1.7, the large aperture characteristic of the camera lens can be achieved, so that the camera lens can image in a dark environment and ensure the imaging quality of the camera lens. At the same time, by limiting (f3 / f)+(f2 / f) within a reasonable range, the sensitivity of the second lens and the third lens can be reduced, which is beneficial to the coordination between the various lenses, better eliminates the aberrations of the camera lens, and improves the imaging quality of the camera lens. In addition, it can achieve good light convergence and increase the field of view angle of the camera lens. At the same time, it ensures that the light is smoothly transmitted in the optical path of the camera lens, which is beneficial to the later processing of the camera lens structure. BRIEF DESCRIPTION OF THE DRAWINGS

[0037] The accompanying drawings, which constitute part of this application, are intended to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are intended to explain the present invention and do not constitute an undue limitation of the present invention. In the accompanying drawings:

[0038] Figure 1 A schematic structural diagram of a camera lens according to Example 1 of the present invention is shown;

[0039] Figures 2 to 5 Shown respectively Figure 1 The axial chromatic aberration curve, magnification chromatic aberration curve, astigmatism curve and distortion curve of the camera lens;

[0040] Figure 6A schematic structural diagram of a camera lens according to Example 2 of the present invention is shown;

[0041] Figures 7 to 10 Shown respectively Figure 6 The axial chromatic aberration curve, magnification chromatic aberration curve, astigmatism curve and distortion curve of the camera lens;

[0042] Figure 11 A schematic structural diagram of a camera lens according to Example 3 of the present invention is shown;

[0043] Figures 12 to 15 Shown respectively Figure 11 The axial chromatic aberration curve, magnification chromatic aberration curve, astigmatism curve and distortion curve of the camera lens;

[0044] Figure 16 Schematic diagram showing the structure of a camera lens according to Example 4 of the present invention;

[0045] Figures 17 to 20 Shown respectively Figure 16 The axial chromatic aberration curve, magnification chromatic aberration curve, astigmatism curve and distortion curve of the camera lens;

[0046] Figure 21 A schematic structural diagram of a camera lens according to Example 5 of the present invention is shown;

[0047] Figures 22 to 25 Shown respectively Figure 21 The axial chromatic aberration curve, magnification chromatic aberration curve, astigmatism curve and distortion curve of the camera lens;

[0048] Figure 26 1. A schematic structural diagram of a camera lens according to Example 6 of the present invention is shown;

[0049] Figures 27 to 30 Shown respectively Figure 26 The axial chromatic aberration curve, magnification chromatic aberration curve, astigmatism curve and distortion curve of the camera lens in.

[0050] The above drawings include the following reference numerals:

[0051] STO, aperture; E1, first lens; S1, object-side surface of the first lens; S2, image-side surface of the first lens; E2, second lens; S3, object-side surface of the second lens; S4, image-side surface of the second lens; E3, third lens; S5, object-side surface of the third lens; S6, image-side surface of the third lens; E4, fourth lens; S7, object-side surface of the fourth lens; S8, image-side surface of the fourth lens; E5, fifth lens; S9, object-side surface of the fifth lens; S10, image-side surface of the fifth lens; E6, sixth lens;

[0052] S11, object-side surface of the sixth lens; S12, image-side surface of the sixth lens; E7, filter; S13, object-side surface of the filter; S14, image-side surface of the filter; S15, imaging surface. DETAILED DESCRIPTION

[0053] It should be noted that, in the absence of conflict, the embodiments and features of the embodiments in this application can be combined with each other. The present invention will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0054] 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 ordinary technicians in the technical field to which this application belongs.

[0055] In the present invention, unless otherwise specified, the directional words used, such as "up, down, top, bottom", usually refer to the directions shown in the drawings, or to the components themselves in the vertical, perpendicular or gravity direction; similarly, for ease of understanding and description, "inside and outside" refer to the inside and outside relative to the outline of each component itself, but the above directional words are not used to limit the present invention.

[0056] It should be noted that in this specification, the terms "first," "second," "third," etc., are used solely to distinguish one feature from another and do not limit the features. Thus, the first lens discussed below could also be referred to as the second lens or the third lens without departing from the teachings of this application.

[0057] In the drawings, the thickness, size, and shape of the lenses are slightly exaggerated for ease of illustration. Specifically, the shapes of the spherical and aspherical surfaces shown in the drawings are provided by way of example. That is, the shapes of the spherical and aspherical surfaces are not limited to those shown in the drawings. The drawings are for illustration only and are not drawn strictly to scale.

[0058] In this article, the paraxial area refers to the area near the optical axis. If the lens surface is convex and the convex surface position 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 concave surface position is not defined, it means that the lens surface is concave at least in the paraxial area. The surface of each lens close to the object side is called the object side surface of the lens, and the surface of each lens close to the image side is called the image side surface of the lens. The judgment of the surface shape in the paraxial area can be based on the judgment method of common knowledge in this field, and the positive and negative R value (R refers to the curvature radius of the paraxial area, usually refers to the R value on the lens database (lens data) in the optical software) is used to judge the convexity. In terms of the object side, when the R value is positive, it is judged to be convex, and when the R value is negative, it is judged to be concave; in terms of the image side, when the R value is positive, it is judged to be concave, and when the R value is negative, it is judged to be convex.

[0059] In order to solve the problem of poor imaging quality of nighttime shooting by a camera lens in the prior art, the present invention provides a camera lens.

[0060] Example 1

[0061] like Figures 1 to 30 As shown, along the object side to the image side of the camera lens, the camera lens includes a first lens, a second lens, a third lens, a fourth lens, a fifth lens and a sixth lens in sequence; the third lens has negative optical focal power; the fourth lens has negative optical focal power; the object side surface of the sixth lens is concave, and the image side surface of the sixth lens is concave; wherein, the aperture value Fno of the camera lens satisfies: Fno<1.7; the effective focal length f of the camera lens, the effective focal length f2 of the second lens and the effective focal length f3 of the third lens satisfy: -8<(f3 / f)+(f2 / f)<-5.

[0062] By controlling the object side and image side of the sixth lens to be concave, the image height of the camera lens on the imaging surface can be increased. By controlling the optical focal length of the third lens and the fourth lens to be negative, it is beneficial to balance the aberrations generated by the camera lens and improve the imaging quality of the camera lens. By controlling the aperture value Fno of the camera lens to be less than 1.7, the large aperture characteristic of the camera lens can be achieved, so that the camera lens can image in a dark environment and ensure the imaging quality of the camera lens. At the same time, by limiting (f3 / f)+(f2 / f) within a reasonable range, the sensitivity of the second lens and the third lens can be reduced, which is beneficial to the coordination of each lens, better eliminates the aberrations of the camera lens, and improves the imaging quality of the camera lens. In addition, it can achieve good light convergence and increase the field of view angle of the camera lens. At the same time, it ensures that the light is smoothly transmitted in the optical path of the camera lens, which is beneficial to the later processing of the camera lens structure.

[0063] It should be noted that most of the first through sixth lenses utilize aspheric surfaces. Since an aspheric surface is a structure formed by rotating a curved surface in the meridian plane around the optical axis, it possesses rotational symmetry. In an ideal optical system, an aspheric surface can effectively correct aberrations in both the meridian and sagittal planes. Furthermore, the unique lens model of the aspheric surface provides ample room for subsequent adjustments, allowing for greater wiggle room in the related structural and assembly processes, preventing excessive degradation of image quality due to assembly and process limitations. Combined with the six-element camera lens and its large aperture, this effectively guarantees the camera lens's image quality. Furthermore, the six-element camera lens does not require a particularly large number of lenses, nor does it impose a significant workload on assembly.

[0064] Preferably, the effective focal length f of the camera lens, the effective focal length f2 of the second lens, and the effective focal length f3 of the third lens satisfy the following relationship: -7.5<(f3 / f)+(f2 / f)<-5.

[0065] In this embodiment, the following relationship is satisfied among the maximum semi-field angle Semi-FOV of the camera lens, half of the diagonal length ImgH of the effective pixel region on the imaging surface of the camera lens, the effective focal length f3 of the third lens, and the effective focal length f4 of the fourth lens: -18 < (f3 + f4) / (ImgH * tan(Semi-FOV)) < -12. By controlling (f3 + f4) / (ImgH * tan(Semi-FOV)) within a reasonable range, the sensitivity of the third lens and the fourth lens can be reduced, strict tolerance requirements can be avoided, the overall layout of the camera lens can be balanced, a large field angle of the camera lens can be ensured, and the imaging quality of the edge field of view can be improved. The value of the image height can ensure the size of the image plane of the camera lens, making the shooting of the camera lens clearer. Preferably, -18 < (f3 + f4) / (ImgH * tan(Semi-FOV)) < -12.

[0066] In this embodiment, the following relationship is satisfied among the maximum semi-field angle Semi-FOV of the camera lens, the axial distance SL from the aperture of the camera lens to the imaging surface of the camera lens, and the entrance pupil diameter EPD of the camera lens: 1.5 < SL / EPD * tan(Semi-FOV) < 1.8. By restricting SL / EPD * tan(Semi-FOV) within a reasonable range, the entrance pupil diameter is restricted within a reasonable range to ensure the light flux of the camera lens and the clarity of the imaging of the camera lens. At the same time, the overall layout of the camera lens can be balanced, which is beneficial to balancing the distortion, coma, and chromatic aberration of the camera lens, correcting the field curvature and astigmatism, and ensuring high imaging quality of the edge field of view of the camera lens at a large field angle. In addition, the length of the camera lens can be effectively controlled, which is conducive to the development of the camera lens towards miniaturization and thinness. Preferably, 1.5 < SL / EPD * tan(Semi-FOV) < 1.75.

[0067] In this embodiment, the following relationship is satisfied among the axial distance TTL from the object side surface of the first lens to the imaging surface of the camera lens, the aperture value Fno of the camera lens, and the axial distance BFL from the image side surface of the sixth lens to the imaging surface of the camera lens: 3 < TTL / BFL / Fno < 4. By restricting TTL / BFL / Fno within a reasonable range, the length of the camera lens can be effectively restricted, which is conducive to the development of the camera lens towards miniaturization and thinness. In addition, the size of the back focal length of the camera lens can be controlled, which is beneficial to the placement of the color filter and the design of other机构部分 (it seems there is a missing word here, perhaps "components") behind the camera lens. In addition, by controlling the aperture value of the camera lens, the camera lens can achieve the characteristic of a large aperture. Preferably, 3 < TTL / BFL / Fno < 3.5.

[0068] In this embodiment, the following condition is satisfied between the radius of curvature R1 of the object side surface of the first lens and the radius of curvature R2 of the image side surface of the first lens: 1 < (R1 + R2) / (R2 - R1) < 2. By controlling (R1 + R2) / (R2 - R1) within a reasonable range, it is beneficial to reasonably set the radius of curvature of the object side surface and the image side surface of the first lens, reduce the sensitivity of the first lens, and enable the first lens to maintain good processability. In addition, such a setting makes the bending degrees of the object side surface and the image side surface of the first lens not too large, which helps to compress the axial distance from the object side surface of the first lens to the imaging surface of the camera lens, enabling a reasonable distribution of the optical power of the camera lens and preventing it from being overly concentrated on the first lens. At the same time, it is beneficial to the aberration correction of other lenses and ensures the imaging quality of the camera lens. Preferably, 1.3 < (R1 + R2) / (R2 - R1) < 1.8.

[0069] In this embodiment, the following condition is satisfied among the radius of curvature R1 of the object side surface of the first lens, the radius of curvature R2 of the image side surface of the first lens, and the effective focal length f1 of the first lens: 0.4 < f1 / (R2 - R1) < 1. By controlling f1 / (R2 - R1) within a reasonable range, the size of the camera lens can be effectively reduced, enabling a reasonable distribution of the optical power of the camera lens and preventing it from being overly concentrated on the first lens, reducing the sensitivity of the first lens, and at the same time enabling the first lens to maintain good processability. In addition, it is beneficial to the aberration correction of other lenses and ensures the imaging quality of the camera lens. Preferably, 0.4 < f1 / (R2 - R1) < 0.9.

[0070] In this embodiment, the following condition is satisfied among the radius of curvature R3 of the object side surface of the second lens, the radius of curvature R4 of the image side surface of the second lens, the radius of curvature R7 of the object side surface of the fourth lens, and the radius of curvature R8 of the image side surface of the fourth lens: 0.7 < (R3 + R4) / (R7 + R8) < 1. By restricting (R3 + R4) / (R7 + R8) within a reasonable range, the radius of curvature of the second lens and the fourth lens can be reasonably controlled, effectively balancing the astigmatism and coma between the second lens and the fourth lens, enabling the camera lens to maintain better imaging quality. At the same time, the sensitivity of the second lens and the fourth lens is reduced, which is beneficial to meeting the processing requirements. Preferably, 0.75 < (R3 + R4) / (R7 + R8) < 0.95.

[0071] In this embodiment, the on-axis distance TTL from the object side of the first lens to the imaging surface of the camera lens, the on-axis distance BFL from the image side of the sixth lens to the imaging surface of the camera lens, and the on-axis distance Tr9r12 from the object side of the fifth lens to the image side of the sixth lens satisfy: 0.45 < (Tr9r12 + BFL) / TTL < 0.55. By restricting (Tr9r12 + BFL) / TTL within a reasonable range, the risk of ghost images in the camera lens can be effectively reduced. (Tr9r12 + BFL) is the distance from the fifth lens to the imaging surface, and (Tr9r12 + BFL) / TTL is the proportion of the distance from the fifth lens to the imaging surface to the total length of the camera lens, which can effectively ensure the processability of the fifth lens and the sixth lens, reasonably control the cooperation of the thicknesses of the fifth lens, the sixth lens, and the total length of the camera lens, and is conducive to the development of the camera lens towards miniaturization and thinness. Preferably, 0.46 < (Tr9r12 + BFL) / TTL < 0.52.

[0072] In this embodiment, the center thickness CT1 of the first lens and the center thickness CT5 of the fifth lens satisfy: 0.8 < CT1 / CT5 < 1.2. By restricting CT1 / CT5 within a reasonable range, it is beneficial to reasonably distribute the thicknesses of the first lens and the fifth lens, improve the longitudinal spherical aberration of the camera lens, and improve the ghost images at the center of the image plane. In addition, the structural stability of the camera lens can be enhanced. Preferably, 0.8 < CT1 / CT5 < 1.15.

[0073] In this embodiment, the center thickness CT1 of the first lens, the center thickness CT6 of the sixth lens, the edge thickness ET1 of the first lens, and the edge thickness ET6 of the sixth lens satisfy: 0.7 < (ET1 / CT1) / (CT6 / ET6) < 1. By restricting (ET1 / CT1) / (CT6 / ET6) within a reasonable range, the structural dimensions of the first lens and the sixth lens can be effectively controlled, preventing the lens edges from being too thin, ensuring the overall shape of the lens, thus maintaining good processability and balancing the distortion influence amount of the camera lens. Preferably, 0.7 < (ET1 / CT1) / (CT6 / ET6) < 0.95.

[0074] In this embodiment, the on-axis distance TD from the object side of the first lens to the image side of the sixth lens and the sum ∑ET of the edge thicknesses of the first lens to the sixth lens on the optical axis of the camera lens satisfy: 0.7 < ∑ET / TD < 0.9. By restricting ∑ET / TD within a reasonable range, the structural dimensions of each lens of the camera lens can be effectively controlled, avoiding the difficulties in process processing due to the too-thin lenses. In addition, the total length of the camera lens can be effectively restricted, which is conducive to the development of the camera lens towards miniaturization and thinness. Preferably, 0.75 < ∑ET / TD < 0.85.

[0075] In this embodiment, the central thickness CT2 of the second lens on the optical axis of the camera lens, the central thickness CT3 of the third lens on the optical axis of the camera lens, and the distance T23 on the optical axis of the air gap between the second lens and the third lens satisfy: 1 < T23 / (CT2 + CT3) ≤ 1.1. By restricting T23 / (CT2 + CT3) within a reasonable range, the longitudinal spherical aberration of the camera lens can be improved, the ghost image at the center of the imaging surface of the camera lens can be improved, and the imaging quality of the camera lens can be enhanced. In addition, the stability of the camera lens structure can be enhanced. Preferably, 1.01 < T23 / (CT2 + CT3) ≤ 1.1.

[0076] In this embodiment, the axial distance SAG61 between the intersection of the object side surface of the sixth lens and the optical axis of the camera lens and the vertex of the effective radius of the object side surface of the sixth lens, and the axial distance SAG62 between the intersection of the image side surface of the sixth lens and the optical axis of the camera lens and the vertex of the effective radius of the image side surface of the sixth lens satisfy: 1 ≤ SAG61 / SAG62 < 2. By restricting SAG61 / SAG62 within a reasonable range, the lens shape of the sixth lens can be ensured, and the machinability of the camera lens can be improved. In addition, it has a good effect on avoiding stray light and ghost images, and ensures the imaging quality of the camera lens. Preferably, 1 ≤ SAG61 / SAG62 < 1.8.

[0077] In this embodiment, the Abbe number of four out of the six lenses of the camera lens is greater than 50, which is beneficial to the chromatic aberration balance of the camera lens and ensures the imaging quality of the camera lens.

[0078] In this embodiment, the camera lens further includes an aperture. The aperture is located on the object side of the first lens. The object side surface of the first lens is a convex surface, and the first lens is a meniscus lens; the object side surface of the second lens is a convex surface, and the second lens is a meniscus lens. By controlling the surface shapes of the first lens and the second lens and the position of the aperture, the machinability of the camera lens can be effectively ensured. In addition, it is beneficial to the cooperation between the aperture and each lens of the camera lens, and can effectively reduce the risk of ghost images appearing in the camera lens, ensuring the imaging quality of the camera lens.

[0079] Embodiment Two

[0080] As Figures 1 to 30As shown, along the object side to the image side of the camera lens, the camera lens sequentially includes a first lens, a second lens, a third lens, a fourth lens, a fifth lens and a sixth lens; the third lens has negative optical focal power; the fourth lens has negative optical focal power; the object side surface of the sixth lens is concave, and the image side surface of the sixth lens is concave; wherein, the aperture value Fno of the camera lens satisfies: Fno<1.7; the maximum half field of view Semi-FOV of the camera lens, half the diagonal length of the effective pixel area on the imaging plane of the camera lens ImgH, the effective focal length f3 of the third lens and the effective focal length f4 of the fourth lens satisfy: -18<(f3+f4) / (ImgH*tan(Semi-FOV))<-12.

[0081] By controlling the object side and image side of the sixth lens to be concave, the image height of the camera lens on the imaging surface can be increased. By controlling the optical focal length of the third lens and the fourth lens to be negative, it is beneficial to balance the aberrations generated by the camera lens and improve the imaging quality of the camera lens. By controlling the aperture value Fno of the camera lens to be less than 1.7, the large aperture characteristic of the camera lens can be achieved, so that the camera lens can image in a dark environment and ensure the imaging quality of the camera lens. At the same time, by controlling (f3+f4) / (ImgH*tan(Semi-FOV)) within a reasonable range, the sensitivity of the third lens and the fourth lens can be reduced, avoiding overly strict tolerance requirements, and the overall layout of the camera lens can be balanced, ensuring that the camera lens has a large field of view angle and improving the imaging quality of the edge field of view. The value of the image height can ensure the image size of the camera lens, making the camera lens clearer.

[0082] Preferably, the maximum half field of view Semi-FOV of the camera lens, half the diagonal length of the effective pixel area on the imaging plane of the camera lens ImgH, the effective focal length f3 of the third lens and the effective focal length f4 of the fourth lens satisfy the following: -18<(f3+f4) / (ImgH*tan(Semi-FOV))<-12.

[0083] In this embodiment, the relationship among the maximum semi-field angle Semi-FOV of the camera lens, the axial distance SL from the aperture of the camera lens to the imaging surface of the camera lens, and the entrance pupil diameter EPD of the camera lens satisfies: 1.5 < SL / EPD * tan(Semi-FOV) < 1.8. By restricting SL / EPD * tan(Semi-FOV) within a reasonable range, the entrance pupil diameter is restricted within a reasonable range to ensure the light flux of the camera lens and ensure clear imaging of the camera lens. At the same time, the overall layout of the camera lens can be balanced, which is beneficial to balancing the distortion, coma, and chromatic aberration of the camera lens, correcting field curvature and astigmatism, and ensuring high imaging quality in the edge field of view at a large field angle of the camera lens. In addition, the length of the camera lens can be effectively controlled, which is conducive to the development of the camera lens towards miniaturization and thinness. Preferably, 1.5 < SL / EPD * tan(Semi-FOV) < 1.75.

[0084] In this embodiment, the relationship among the axial distance TTL from the object side surface of the first lens to the imaging surface of the camera lens, the f-number Fno of the camera lens, and the axial distance BFL from the image side surface of the sixth lens to the imaging surface of the camera lens satisfies: 3 < TTL / BFL / Fno < 4. By restricting TTL / BFL / Fno within a reasonable range, the length of the camera lens can be effectively restricted, which is conducive to the development of the camera lens towards miniaturization and thinness. In addition, the size of the back focal length of the camera lens can be controlled, which is beneficial to the placement of the color filter and the design of other机构部分 (it seems there is a mistake here, maybe it should be "other parts of the mechanism") behind the camera lens. In addition, by controlling the f-number of the camera lens, the camera lens can achieve the characteristics of a large aperture. Preferably, 3 < TTL / BFL / Fno < 3.5.

[0085] In this embodiment, the relationship between the radius of curvature R1 of the object side surface of the first lens and the radius of curvature R2 of the image side surface of the first lens satisfies: 1 < (R1 + R2) / (R2 - R1) < 2. By controlling (R1 + R2) / (R2 - R1) within a reasonable range, it is beneficial to reasonably set the radii of curvature of the object side surface and the image side surface of the first lens, reduce the sensitivity of the first lens, and keep good processability of the first lens. In addition, such a setting makes the bending degrees of the object side surface and the image side surface of the first lens not too large, which helps to compress the axial distance from the object side surface of the first lens to the imaging surface of the camera lens, enables reasonable distribution of the optical power of the camera lens, and prevents excessive concentration on the first lens. At the same time, it is beneficial to the aberration correction of other lenses and ensures the imaging quality of the camera lens. Preferably, 1.3 < (R1 + R2) / (R2 - R1) < 1.8.

[0086] In this embodiment, the relationship between the radius of curvature R1 of the object side surface of the first lens, the radius of curvature R2 of the image side surface of the first lens, and the effective focal length f1 of the first lens satisfies: 0.4 < f1 / (R2 - R1) < 1. By controlling f1 / (R2 - R1) within a reasonable range, the size of the camera lens can be effectively reduced, the optical power of the camera lens can be reasonably distributed, and it will not be overly concentrated on the first lens, reducing the sensitivity of the first lens. At the same time, the first lens can maintain good processability. In addition, it is beneficial to the aberration correction of other lenses and ensures the imaging quality of the camera lens. Preferably, 0.4 < f1 / (R2 - R1) < 0.9.

[0087] In this embodiment, the relationship between the radius of curvature R3 of the object side surface of the second lens, the radius of curvature R4 of the image side surface of the second lens, the radius of curvature R7 of the object side surface of the fourth lens, and the radius of curvature R8 of the image side surface of the fourth lens satisfies: 0.7 < (R3 + R4) / (R7 + R8) < 1. By restricting (R3 + R4) / (R7 + R8) within a reasonable range, the radii of curvature of the second lens and the fourth lens can be reasonably controlled, effectively balancing the astigmatism and coma between the second lens and the fourth lens, and enabling the camera lens to maintain better imaging quality. At the same time, the sensitivity of the second lens and the fourth lens is reduced, which is beneficial to meeting the processing requirements. Preferably, 0.75 < (R3 + R4) / (R7 + R8) < 0.95.

[0088] In this embodiment, the relationship between the on-axis distance TTL from the object side surface of the first lens to the imaging surface of the camera lens, the on-axis distance BFL from the image side surface of the sixth lens to the imaging surface of the camera lens, and the on-axis distance Tr9r12 from the object side surface of the fifth lens to the image side surface of the sixth lens satisfies: 0.45 < (Tr9r12 + BFL) / TTL < 0.55. By restricting (Tr9r12 + BFL) / TTL within a reasonable range, the risk of ghost images in the camera lens can be effectively reduced. (Tr9r12 + BFL) is the distance from the fifth lens to the imaging surface, and (Tr9r12 + BFL) / TTL is the ratio of the distance from the fifth lens to the imaging surface to the total length of the camera lens, which can effectively ensure the processability of the fifth lens and the sixth lens, reasonably control the thickness of the fifth lens and the sixth lens and the coordination of the total length of the camera lens, and is beneficial to the miniaturization and thinning of the camera lens. Preferably, 0.46 < (Tr9r12 + BFL) / TTL < 0.52.

[0089] In this embodiment, the center thickness CT1 of the first lens and the center thickness CT5 of the fifth lens satisfy: 0.8 < CT1 / CT5 < 1.2. By restricting CT1 / CT5 within a reasonable range, it is beneficial to reasonably distribute the thicknesses of the first lens and the fifth lens, which can improve the longitudinal spherical aberration of the camera lens and improve the ghost image at the center of the image plane. Additionally, it can enhance the structural stability of the camera lens. Preferably, 0.8 < CT1 / CT5 < 1.15.

[0090] In this embodiment, the center thickness CT1 of the first lens, the center thickness CT6 of the sixth lens, the edge thickness ET1 of the first lens, and the edge thickness ET6 of the sixth lens satisfy: 0.7 < (ET1 / CT1) / (CT6 / ET6) < 1. By restricting (ET1 / CT1) / (CT6 / ET6) within a reasonable range, the structural dimensions of the first lens and the sixth lens can be effectively controlled, preventing the lens edges from being too thin, ensuring the overall shape of the lens, thus maintaining good processability and balancing the distortion influence amount of the camera lens. Preferably, 0.7 < (ET1 / CT1) / (CT6 / ET6) < 0.95.

[0091] In this embodiment, the on-axis distance TD from the object side surface of the first lens to the image side surface of the sixth lens and the sum ∑ET of the edge thicknesses of the first lens to the sixth lens on the optical axis of the camera lens satisfy: 0.7 < ∑ET / TD < 0.9. By restricting ∑ET / TD within a reasonable range, the structural dimensions of each lens of the camera lens can be effectively controlled, avoiding the difficulties in process machining caused by the lenses being too thin. Additionally, it can effectively limit the total length of the camera lens, which is beneficial for the camera lens to develop towards miniaturization and thinness. Preferably, 0.75 < ∑ET / TD < 0.85.

[0092] In this embodiment, the center thickness CT2 of the second lens on the optical axis of the camera lens, the center thickness CT3 of the third lens on the optical axis of the camera lens, and the distance T23 on the optical axis of the air gap between the second lens and the third lens satisfy: 1 < T23 / (CT2 + CT3) ≤ 1.1. By restricting T23 / (CT2 + CT3) within a reasonable range, the longitudinal spherical aberration of the camera lens can be improved, the ghost image at the center of the imaging plane of the camera lens can be improved, and the imaging quality of the camera lens can be enhanced. Additionally, it can enhance the structural stability of the camera lens. Preferably, 1.01 < T23 / (CT2 + CT3) ≤ 1.1.

[0093] In this embodiment, the on-axis distance SAG61 between the intersection of the object side surface of the sixth lens and the optical axis of the camera lens to the effective radius vertex of the object side surface of the sixth lens, and the on-axis distance SAG62 between the intersection of the image side surface of the sixth lens and the optical axis of the camera lens to the effective radius vertex of the image side surface of the sixth lens satisfy the following conditions: 1≤SAG61 / SAG62<2. By limiting SAG61 / SAG62 within a reasonable range, the lens shape of the sixth lens can be guaranteed and the processability of the camera lens can be improved. In addition, it has a good avoidance effect on stray light and ghost images, ensuring the imaging quality of the camera lens. Preferably, 1≤SAG61 / SAG62<1.8.

[0094] In this embodiment, the Abbe numbers of four of the six lenses of the camera lens are greater than 50, which is beneficial to balancing the chromatic aberration of the camera lens and ensuring the imaging quality of the camera lens.

[0095] In this embodiment, the camera lens further includes an aperture, located on the object side of a first lens element. The first lens element has a convex object-side surface, and is a meniscus lens. The second lens element also has a convex object-side surface, and is a meniscus lens. By controlling the surface profiles of the first and second lenses, as well as the position of the aperture, the camera lens's manufacturability can be effectively guaranteed. This also facilitates the coordination between the aperture and the various lens elements in the camera lens, effectively reducing the risk of ghost images and ensuring image quality.

[0096] Optionally, the camera lens may further include a filter for correcting color deviation and / or a protective glass for protecting a photosensitive element located on the imaging surface.

[0097] The camera lens in this application can utilize multiple lenses, such as the six lenses described above. By rationally allocating the focal power, surface shape, center thickness of each lens, and the on-axis distance between lenses, the aperture of the camera lens can be effectively increased, the sensitivity of the lens reduced, and the processability of the lens improved, making the camera lens more amenable to production and processing and suitable for portable electronic devices such as smartphones. The aforementioned camera lens also offers the advantages of a large aperture, wide field of view, and excellent image quality, meeting the demands of miniaturization in smart electronic products.

[0098] In this application, at least one of the lens surfaces is an aspheric surface. Aspheric lenses are characterized by a continuously varying curvature from the center to the periphery. Unlike spherical lenses, which have a constant curvature from the center to the periphery, aspheric lenses have a more optimized curvature radius, offering advantages in reducing distortion and astigmatism. The use of aspheric lenses minimizes aberrations that occur during imaging, thereby improving image quality.

[0099] However, those skilled in the art will appreciate that the number of lenses comprising the imaging lens can be varied to achieve the various results and advantages described herein without departing from the claimed technical solutions. For example, while the embodiments describe six lenses as an example, the imaging lens is not limited to six lenses. If desired, the imaging lens may include other numbers of lenses.

[0100] The following further describes examples of specific surface shapes and parameters of the camera lens applicable to the above-mentioned embodiment with reference to the accompanying drawings.

[0101] It should be noted that any one of the following examples 1 to 6 is applicable to all embodiments of the present application.

[0102] Example 1

[0103] like Figures 1 to 5 As shown, the camera lens of Example 1 of the present application is described. Figure 1 A schematic diagram showing the structure of a camera lens of Example 1 is shown.

[0104] like Figure 1 As shown, the camera lens includes, from the object side to the image side, an aperture STO, a first lens E1, a second lens E2, a third lens E3, a fourth lens E4, a fifth lens E5, a sixth lens E6, a filter E7 and an imaging surface S15.

[0105] The first lens E1 has positive focal power, with its object-side surface S1 being convex and its image-side surface S2 being concave. The second lens E2 has negative focal power, with its object-side surface S3 being convex and its image-side surface S4 being concave. The third lens E3 has negative focal power, with its object-side surface S5 being convex and its image-side surface S6 being concave. The fourth lens E4 has negative focal power, with its object-side surface S7 being convex and its image-side surface S8 being concave. The fifth lens E5 has positive focal power, with its object-side surface S9 being convex and its image-side surface S10 being convex. The sixth lens E6 has negative focal power, with its object-side surface S11 being concave and its image-side surface S12 being concave. The filter E7 has an object-side surface S13 and an image-side surface S14. Light from an object passes through the surfaces S1 to S14 in sequence and is finally imaged on the imaging surface S15 .

[0106] In this example, the total effective focal length f of the camera lens is 4.89 mm, the maximum half field of view angle Semi-FOV of the camera lens is 39.99°, the total length TTL of the camera lens is 6.10 mm, the image height ImgH of the camera lens is 4.21 mm, and the aperture value Fno of the camera lens is 1.63.

[0107] Table 1 shows the basic structural parameters of the camera lens of Example 1, wherein the units of curvature radius, thickness / distance, focal length and effective radius are all millimeters (mm).

[0108]

[0109] Table 1

[0110] In Example 1, the object-side surface and the image-side surface of any lens from the first lens E1 to the sixth lens E6 are both aspherical surfaces. The surface shape of each aspherical lens can be defined by, but is not limited to, the following aspherical surface formula:

[0111]

[0112] Where x is the distance vector from the vertex of the aspheric surface at a height of h along the optical axis; c is the paraxial curvature of the aspheric surface, c = 1 / R (i.e., paraxial curvature c is the reciprocal of the radius of curvature R in Table 1 above); k is the conic coefficient; and Ai is the correction coefficient for the i-th order of the aspheric surface. Table 2 below lists the high-order coefficients A4, A6, A8, A10, A12, A14, A16, A18, A20, A22, and A24 that can be used for each aspheric mirror surface S1-S12 in Example 1.

[0113]

[0114] Table 2

[0115] Figure 2 The axial chromatic aberration curve of the camera lens of Example 1 is shown, which indicates the deviation of the focal point of light of different wavelengths after passing through the camera lens. Figure 3 The chromatic aberration curve of the camera lens of Example 1 is shown, which represents the deviation of different image heights on the imaging surface after the light passes through the camera lens. Figure 4 The astigmatism curve of the imaging lens of Example 1 is shown, which indicates meridional field curvature and sagittal field curvature. Figure 5 The distortion curve of the camera lens of Example 1 is shown, which represents the distortion magnitude values corresponding to different field angles.

[0116] according to Figures 2 to 5 It can be seen that the camera lens given in Example 1 can achieve good imaging quality.

[0117] Example 2

[0118] like Figures 6 to 10 As shown, the camera lens of Example 2 of the present application is described. In this example and the following examples, for the sake of brevity, some descriptions similar to Example 1 will be omitted. Figure 6 A schematic diagram of the camera lens structure of Example 2 is shown.

[0119] like Figure 6 As shown, the camera lens includes, from the object side to the image side, an aperture STO, a first lens E1, a second lens E2, a third lens E3, a fourth lens E4, a fifth lens E5, a sixth lens E6, a filter E7 and an imaging surface S15.

[0120] The first lens E1 has positive focal power, with its object-side surface S1 being convex and its image-side surface S2 being concave. The second lens E2 has negative focal power, with its object-side surface S3 being convex and its image-side surface S4 being concave. The third lens E3 has negative focal power, with its object-side surface S5 being convex and its image-side surface S6 being concave. The fourth lens E4 has negative focal power, with its object-side surface S7 being convex and its image-side surface S8 being concave. The fifth lens E5 has positive focal power, with its object-side surface S9 being convex and its image-side surface S10 being convex. The sixth lens E6 has negative focal power, with its object-side surface S11 being concave and its image-side surface S12 being concave. The filter E7 has an object-side surface S13 and an image-side surface S14. Light from an object passes through the surfaces S1 to S14 in sequence and is finally imaged on the imaging surface S15 .

[0121] In this example, the total effective focal length f of the camera lens is 4.76 mm, the maximum half field of view angle Semi-FOV of the camera lens is 40.78°, the total length TTL of the camera lens is 5.93 mm, the image height ImgH of the camera lens is 4.20 mm, and the aperture value Fno of the camera lens is 1.63.

[0122] Table 3 shows the basic structural parameters of the camera lens of Example 2, wherein the units of curvature radius, thickness / distance, focal length and effective radius are all millimeters (mm).

[0123]

[0124] Table 3

[0125] Table 4 shows the high-order coefficients of each aspheric mirror surface that can be used in Example 2, wherein each aspheric surface shape can be defined by formula (1) given in Example 1 above.

[0126]

[0127]

[0128] Table 4

[0129] Figure 7 The axial chromatic aberration curve of the camera lens of Example 2 is shown, which indicates the deviation of the focal point of light of different wavelengths after passing through the camera lens. Figure 8The chromatic aberration curve of the camera lens of Example 2 is shown, which represents the deviation of different image heights on the imaging surface after the light passes through the camera lens. Figure 9 The astigmatism curve of the imaging lens of Example 2 is shown, which indicates meridional field curvature and sagittal field curvature. Figure 10 The distortion curve of the camera lens of Example 2 is shown, which represents the distortion magnitude values corresponding to different field angles.

[0130] according to Figures 7 to 10 It can be seen that the camera lens provided in Example 2 can achieve good imaging quality.

[0131] Example 3

[0132] like Figures 11 to 15 As shown, the camera lens of Example 3 of this application is described. Figure 11 A schematic diagram of the camera lens structure of Example 3 is shown.

[0133] like Figure 11 As shown, the camera lens includes, from the object side to the image side, an aperture STO, a first lens E1, a second lens E2, a third lens E3, a fourth lens E4, a fifth lens E5, a sixth lens E6, a filter E7 and an imaging surface S15.

[0134] The first lens E1 has positive focal power, with its object-side surface S1 being convex and its image-side surface S2 being concave. The second lens E2 has negative focal power, with its object-side surface S3 being convex and its image-side surface S4 being concave. The third lens E3 has negative focal power, with its object-side surface S5 being convex and its image-side surface S6 being concave. The fourth lens E4 has negative focal power, with its object-side surface S7 being convex and its image-side surface S8 being concave. The fifth lens E5 has positive focal power, with its object-side surface S9 being convex and its image-side surface S10 being convex. The sixth lens E6 has negative focal power, with its object-side surface S11 being concave and its image-side surface S12 being concave. The filter E7 has an object-side surface S13 and an image-side surface S14. Light from an object passes through the surfaces S1 to S14 in sequence and is finally imaged on the imaging surface S15 .

[0135] In this example, the total effective focal length f of the camera lens is 5.02 mm, the maximum half field of view angle Semi-FOV of the camera lens is 39.92°, the total length TTL of the camera lens is 6.25 mm, the image height ImgH of the camera lens is 4.31 mm, and the aperture value Fno of the camera lens is 1.64.

[0136] Table 5 shows the basic structural parameters of the camera lens of Example 3, wherein the units of curvature radius, thickness / distance, focal length and effective radius are all millimeters (mm).

[0137]

[0138] Table 5

[0139] Table 6 shows the high-order coefficients of each aspheric mirror surface that can be used in Example 3, wherein each aspheric surface shape can be defined by formula (1) given in Example 1 above.

[0140]

[0141]

[0142] Table 6

[0143] Figure 12 The axial chromatic aberration curve of the camera lens of Example 3 is shown, which indicates the deviation of the focal point of light of different wavelengths after passing through the camera lens. Figure 13 The chromatic aberration curve of the camera lens of Example 3 is shown, which represents the deviation of different image heights on the imaging surface after the light passes through the camera lens. Figure 14 The astigmatism curve of the imaging lens of Example 3 is shown, which indicates meridional field curvature and sagittal field curvature. Figure 15 The distortion curve of the camera lens of Example 3 is shown, which represents the distortion magnitude values corresponding to different field angles.

[0144] according to Figures 12 to 15 It can be seen that the camera lens given in Example 3 can achieve good imaging quality.

[0145] Example 4

[0146] like Figures 16 to 20 As shown, the camera lens of Example 4 of the present application is described. Figure 16 A schematic diagram showing the structure of a camera lens of Example 4 is shown.

[0147] like Figure 16 As shown, the camera lens includes, from the object side to the image side, an aperture STO, a first lens E1, a second lens E2, a third lens E3, a fourth lens E4, a fifth lens E5, a sixth lens E6, a filter E7 and an imaging surface S15.

[0148] The first lens E1 has positive focal power, with its object-side surface S1 being convex and its image-side surface S2 being concave. The second lens E2 has negative focal power, with its object-side surface S3 being convex and its image-side surface S4 being concave. The third lens E3 has negative focal power, with its object-side surface S5 being convex and its image-side surface S6 being concave. The fourth lens E4 has negative focal power, with its object-side surface S7 being convex and its image-side surface S8 being concave. The fifth lens E5 has positive focal power, with its object-side surface S9 being convex and its image-side surface S10 being convex. The sixth lens E6 has negative focal power, with its object-side surface S11 being concave and its image-side surface S12 being concave. The filter E7 has an object-side surface S13 and an image-side surface S14. Light from an object passes through the surfaces S1 to S14 in sequence and is finally imaged on the imaging surface S15 .

[0149] In this example, the total effective focal length f of the camera lens is 5.10 mm, the maximum half field of view angle Semi-FOV of the camera lens is 40.38°, the total length TTL of the camera lens is 6.31 mm, the image height ImgH of the camera lens is 4.45 mm, and the aperture value Fno of the camera lens is 1.65.

[0150] Table 7 shows the basic structural parameters of the camera lens of Example 4, wherein the units of curvature radius, thickness / distance, focal length and effective radius are all millimeters (mm).

[0151]

[0152]

[0153] Table 7

[0154] Table 8 shows the high-order coefficients of each aspheric mirror surface that can be used in Example 4, where the surface shape of each aspheric surface can be defined by formula (1) given in Example 1 above.

[0155]

[0156] Table 8

[0157] Figure 17 The axial chromatic aberration curve of the camera lens of Example 4 is shown, which indicates the deviation of the focal point of light of different wavelengths after passing through the camera lens. Figure 18 The chromatic aberration curve of the camera lens of Example 4 is shown, which represents the deviation of different image heights on the imaging surface after the light passes through the camera lens. Figure 19 The astigmatism curve of the imaging lens of Example 4 is shown, which indicates meridional field curvature and sagittal field curvature. Figure 20The distortion curve of the camera lens of Example 4 is shown, which represents the distortion magnitude values corresponding to different field angles.

[0158] according to Figures 17 to 20 It can be seen that the camera lens given in Example 4 can achieve good imaging quality.

[0159] Example 5

[0160] like Figures 21 to 25 As shown, the camera lens of Example 5 of the present application is described. Figure 21 A schematic diagram showing the structure of a camera lens of Example 5 is shown.

[0161] like Figure 21 As shown, the camera lens includes, from the object side to the image side, an aperture STO, a first lens E1, a second lens E2, a third lens E3, a fourth lens E4, a fifth lens E5, a sixth lens E6, a filter E7 and an imaging surface S15.

[0162] The first lens E1 has positive focal power, with its object-side surface S1 being convex and its image-side surface S2 being concave. The second lens E2 has negative focal power, with its object-side surface S3 being convex and its image-side surface S4 being concave. The third lens E3 has negative focal power, with its object-side surface S5 being convex and its image-side surface S6 being concave. The fourth lens E4 has negative focal power, with its object-side surface S7 being convex and its image-side surface S8 being concave. The fifth lens E5 has positive focal power, with its object-side surface S9 being convex and its image-side surface S10 being convex. The sixth lens E6 has negative focal power, with its object-side surface S11 being concave and its image-side surface S12 being concave. The filter E7 has an object-side surface S13 and an image-side surface S14. Light from an object passes through the surfaces S1 to S14 in sequence and is finally imaged on the imaging surface S15 .

[0163] In this example, the total effective focal length f of the camera lens is 5.16 mm, the maximum half field of view angle Semi-FOV of the camera lens is 41.41°, the total length TTL of the camera lens is 6.50 mm, the image height ImgH of the camera lens is 4.66 mm, and the aperture value Fno of the camera lens is 1.66.

[0164] Table 9 shows the basic structural parameters of the camera lens of Example 5, where the units of curvature radius, thickness / distance, focal length and effective radius are all millimeters (mm).

[0165]

[0166]

[0167] Table 9

[0168] Table 10 shows the high-order coefficients of each aspheric mirror surface that can be used in Example 5, where the surface shape of each aspheric surface can be defined by formula (1) given in Example 1 above.

[0169]

[0170] Table 10

[0171] Figure 22 The axial chromatic aberration curve of the camera lens of Example 5 is shown, which indicates the deviation of the focal point of light of different wavelengths after passing through the camera lens. Figure 23 The chromatic aberration curve of the camera lens of Example 5 is shown, which represents the deviation of different image heights on the imaging surface after the light passes through the camera lens. Figure 24 The astigmatism curve of the imaging lens of Example 5 is shown, which indicates meridional field curvature and sagittal field curvature. Figure 25 The distortion curve of the camera lens of Example 5 is shown, which represents the distortion magnitude values corresponding to different field angles.

[0172] according to Figures 22 to 25 It can be seen that the camera lens given in Example 5 can achieve good imaging quality.

[0173] Example 6

[0174] like Figures 26 to 30 As shown, the camera lens of Example 6 of the present application is described. Figure 26 A schematic diagram showing the structure of a camera lens of Example 6 is shown.

[0175] like Figure 26 As shown, the camera lens includes, from the object side to the image side, an aperture STO, a first lens E1, a second lens E2, a third lens E3, a fourth lens E4, a fifth lens E5, a sixth lens E6, a filter E7 and an imaging surface S15.

[0176] The first lens E1 has positive focal power, with its object-side surface S1 being convex and its image-side surface S2 being concave. The second lens E2 has negative focal power, with its object-side surface S3 being convex and its image-side surface S4 being concave. The third lens E3 has negative focal power, with its object-side surface S5 being convex and its image-side surface S6 being concave. The fourth lens E4 has negative focal power, with its object-side surface S7 being convex and its image-side surface S8 being concave. The fifth lens E5 has positive focal power, with its object-side surface S9 being convex and its image-side surface S10 being convex. The sixth lens E6 has negative focal power, with its object-side surface S11 being concave and its image-side surface S12 being concave. The filter E7 has an object-side surface S13 and an image-side surface S14. Light from an object passes through the surfaces S1 to S14 in sequence and is finally imaged on the imaging surface S15 .

[0177] In this example, the total effective focal length f of the camera lens is 5.14 mm, the maximum half field of view angle Semi-FOV of the camera lens is 42.44°, the total length TTL of the camera lens is 6.50 mm, the image height ImgH of the camera lens is 4.81 mm, and the aperture value Fno of the camera lens is 1.66.

[0178] Table 11 shows the basic structural parameters of the camera lens of Example 6, where the units of curvature radius, thickness / distance, focal length and effective radius are all millimeters (mm).

[0179]

[0180] Table 11

[0181] Table 12 shows the high-order coefficients of each aspheric mirror surface that can be used in Example 6, where each aspheric surface shape can be defined by formula (1) given in Example 1 above.

[0182]

[0183] Table 12

[0184] Figure 27 The axial chromatic aberration curve of the camera lens of Example 6 is shown, which indicates the deviation of the focal point of light of different wavelengths after passing through the camera lens. Figure 28 The chromatic aberration curve of the camera lens of Example 6 is shown, which represents the deviation of different image heights on the imaging surface after the light passes through the camera lens. Figure 29 The astigmatism curve of the imaging lens of Example 6 is shown, which indicates meridional field curvature and sagittal field curvature. Figure 30 The distortion curve of the camera lens of Example 6 is shown, which represents the distortion magnitude values corresponding to different field angles.

[0185] according to Figures 27 to 30 It can be seen that the camera lens given in Example 6 can achieve good imaging quality.

[0186] In summary, Examples 1 to 6 respectively satisfy the relationships shown in Table 13.

[0187] Conditional formula / Example 1 2 3 4 5 6 (f3 / f)+(f2 / f) -6.15 -7.11 -6.17 -6.64 -6.62 -6.95 (f3+f4) / (ImgH*tan(Semi-FOV)) -15.85 -17.71 -15.38 -14.51 -13.38 -12.69 SL / EPD*tan(Semi-FOV) 1.52 1.57 1.54 1.56 1.66 1.73 TTL / BFL / Fno 3.42 3.40 3.30 3.08 3.24 3.41 (R1+R2) / (R2-R1) 1.45 1.46 1.52 1.75 1.71 1.69 f1 / (R2-R1) 0.49 0.50 0.58 0.89 0.84 0.81 (R3+R4) / (R7+R8) 0.79 0.79 0.90 0.90 0.90 0.92 (Tr9r12+BFL) / TTL 0.47 0.48 0.47 0.48 0.50 0.49 CT1 / CT5 1.10 1.13 1.18 1.12 0.85 0.82 (ET1 / CT1) / (CT6 / ET6) 0.76 0.87 0.92 0.86 0.85 0.76 ∑ET / TD 0.80 0.80 0.80 0.78 0.82 0.79 T23 / (CT2+CT3) 1.03 1.02 1.03 1.03 1.03 1.10 SAG61 / SAG62 1.41 1.26 1.49 1.62 1.00 1.75

[0188] Tables 13 and 14 show the effective focal lengths f of the camera lenses of Examples 1 to 6, and the effective focal lengths f1 to f6 of each lens.

[0189] Example parameters 1 2 3 4 5 6 f(mm) 4.89 4.76 5.02 5.10 5.16 5.14 f1(mm) 4.40 4.39 4.63 5.04 5.13 5.08 f2(mm) -10.02 -9.85 -11.25 -14.56 -14.71 -14.83 f3(mm) -20.10 -23.96 -19.70 -19.30 -19.40 -20.91 f4(mm) -35.85 -40.19 -35.72 -35.61 -35.57 -34.92 f5(mm) 2.77 2.81 2.77 2.77 2.81 2.80 f6(mm) -2.85 -2.85 -2.85 -2.85 -2.84 -2.76 Semi-FOV(°) 39.99 40.78 39.92 40.38 41.41 42.44 TTL(mm) 6.10 5.93 6.25 6.31 6.50 6.50 ImgH(mm) 4.21 4.20 4.31 4.45 4.66 4.81 Fno 1.63 1.63 1.64 1.65 1.66 1.66

[0190] Table 14

[0191] The present application also provides an imaging device, wherein the electronic photosensitive element thereof may be a charge coupled device (CCD) or a complementary metal oxide semiconductor (CMOS). The imaging device may be a standalone 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 described above.

[0192] Obviously, the embodiments described above are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts should fall within the scope of protection of the present invention.

[0193] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present application. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprise" and / or "include" are used in this specification, they indicate the presence of features, steps, tasks, devices, components and / or combinations thereof.

[0194] It should be noted that the terms "first," "second," and the like in the specification and claims of this application and the accompanying drawings are used to distinguish similar objects and are not necessarily used to describe a specific order or precedence. It should be understood that the terms used in this manner are interchangeable where appropriate, so that the embodiments of the present application described herein can be implemented in an order other than that illustrated or described herein.

[0195] The foregoing description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. Those skilled in the art will readily appreciate that various modifications and variations of the present invention are possible. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of the present invention are intended to be within the scope of protection of the present invention.

Claims

1. A camera lens, characterized in that: The camera lens is composed of six lenses, which include: a first lens having positive optical power, an object-side surface of the first lens being convex, and an image-side surface of the first lens being concave; a second lens having negative optical power, an object-side surface of the second lens being convex, and an image-side surface of the second lens being concave; a third lens having negative optical power, an object-side surface of the third lens being convex, and an image-side surface of the third lens being concave; a fourth lens having negative optical power, wherein the object-side surface of the fourth lens is convex, and the image-side surface of the fourth lens is concave; a fifth lens having positive optical power, an object-side surface of the fifth lens being convex, and an image-side surface of the fifth lens being convex; a sixth lens having negative optical power, wherein the object-side surface of the sixth lens is concave, and the image-side surface of the sixth lens is concave; The aperture value Fno of the camera lens satisfies: 1.63≤Fno≤1.66; The effective focal length f of the camera lens, the effective focal length f2 of the second lens, and the effective focal length f3 of the third lens satisfy the following relationship: -7.11≤(f3 / f)+(f2 / f)≤-6.15; The on-axis distance TTL from the object side surface of the first lens to the imaging surface of the camera lens, the aperture value Fno of the camera lens, and the on-axis distance BFL from the image side surface of the sixth lens to the imaging surface of the camera lens satisfy the following conditions: 3.08≤TTL / BFL / Fno≤3.

42.

2. The imaging lens according to claim 1, wherein: The maximum half field of view Semi-FOV of the camera lens, half the diagonal length of the effective pixel area on the imaging surface of the camera lens ImgH, the effective focal length f3 of the third lens and the effective focal length f4 of the fourth lens satisfy the following: -17.71≤(f3+f4) / (ImgH*tan(Semi-FOV))≤-12.

69.

3. The camera lens according to claim 1, wherein: The maximum half field of view angle Semi-FOV of the camera lens, the axial distance SL from the aperture of the camera lens to the imaging surface of the camera lens and the entrance pupil diameter EPD of the camera lens meet the following conditions: 1.5 <SL / EPD*tan(Semi-FOV)< 1.75。 4. The imaging lens according to claim 1, wherein: A curvature radius R1 of the object-side surface of the first lens and a curvature radius R2 of the image-side surface of the first lens satisfy the following relationship: 1.45≤(R1+R2) / (R2-R1)≤1.

75.

5. The imaging lens according to claim 1, wherein: A curvature radius R1 of the object-side surface of the first lens, a curvature radius R2 of the image-side surface of the first lens, and an effective focal length f1 of the first lens satisfy the following relationship: 0.49≤f1 / (R2-R1)<0.

9.

6. The camera lens according to claim 1, wherein: The curvature radius R3 of the object side surface of the second lens, the curvature radius R4 of the image side surface of the second lens, the curvature radius R7 of the object side surface of the fourth lens and the curvature radius R8 of the image side surface of the fourth lens satisfy the following relationship: 0.75<(R3+R4) / (R7+R8)<0.

95.

7. The imaging lens according to claim 1, wherein: The on-axis distance TTL from the object side surface of the first lens to the imaging surface of the camera lens, the on-axis distance BFL from the image side surface of the sixth lens to the imaging surface of the camera lens, and the on-axis distance Tr9r12 from the object side surface of the fifth lens to the image side surface of the sixth lens satisfy the following: 0.45<(Tr9r12+BFL) / TTL<0.

55.

8. The imaging lens according to claim 1, wherein: The center thickness CT1 of the first lens and the center thickness CT5 of the fifth lens satisfy: 0.8 <CT1 / CT5<1.15。 9. The imaging lens according to claim 1, wherein: The center thickness CT1 of the first lens, the center thickness CT6 of the sixth lens, the edge thickness ET1 of the first lens, and the edge thickness ET6 of the sixth lens satisfy the following relationship: 0.76≤(ET1 / CT1) / (CT6 / ET6)<0.

95.

10. The imaging lens according to claim 1, wherein: The on-axis distance TD from the object side surface of the first lens to the image side surface of the sixth lens and the sum ΣET of the edge thicknesses of the first lens to the sixth lens on the optical axis of the camera lens satisfy the following: 0.75<ΣET / TD<0.

85.

11. The imaging lens according to claim 1, wherein: The center thickness CT2 of the second lens on the optical axis of the camera lens, the center thickness CT3 of the third lens on the optical axis of the camera lens, and the distance T23 of the air gap between the second lens and the third lens on the optical axis of the camera lens satisfy the following conditions: 1 <T23 / (CT2+CT3)≤1.1。 12. The imaging lens according to claim 1, wherein: The on-axis distance SAG61 between the intersection of the object side surface of the sixth lens and the optical axis of the camera lens to the effective radius vertex of the object side surface of the sixth lens, and the on-axis distance SAG62 between the intersection of the image side surface of the sixth lens and the optical axis of the camera lens to the effective radius vertex of the image side surface of the sixth lens satisfy the following conditions: 1≤SAG61 / SAG62<1.

8.

13. The camera lens according to any one of claims 1 to 12, wherein: The Abbe numbers of four of the six lenses of the camera lens are greater than 50.

Images