Camera lens

Abstract

The application provides a camera lens. The camera lens comprises, in sequence from the object side to the image side along the optical axis, a first lens, the first lens having negative refractive power; a second lens, the second lens having positive refractive power; a third lens, the third lens having positive refractive power; a fourth lens, the fourth lens having negative refractive power; a fifth lens, the fifth lens having positive refractive power; and a sixth lens, the sixth lens having negative refractive power. A half of the diagonal line length of the effective pixel area on the imaging surface ImgH and the maximum field angle of the camera lens FOV satisfy the relationship: ImgH*TAN(FOV / 3) >= 3.0mm. The effective focal length f of the camera lens and the center thickness CT1 of the first lens satisfy the relationship: f / CT1 < 3.5. The application solves the problem that the camera lens in the prior art cannot simultaneously achieve ultra-wide angle and high image quality.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of optical imaging devices, in particular to a camera lens. BACKGROUND

[0002] In recent years, with the rapid development of smart phones, the trend of using mobile phone cameras instead of traditional cameras is becoming more and more obvious, and the public also prefers mobile phones with high-quality photographing functions. There are various types of camera lenses. For example, a wide-angle lens. The picture taken by the wide-angle lens can highlight the central subject and the foreground while having a wide background. It can take more scenery in a smaller environment, which is conducive to enhancing the appeal of the picture and giving the photographer a sense of being there. However, the wide-angle lens in the prior art has the problems of difficult distortion improvement and difficult chromatic aberration optimization, which is difficult to meet the high image quality requirements of customers.

[0003] That is, the camera lens in the prior art has the problem that ultra-wide angle and high image quality cannot be realized at the same time. SUMMARY

[0004] The main purpose of the present application is to provide a camera lens to solve the problem that the camera lens in the prior art cannot realize ultra-wide angle and high image quality at the same time.

[0005] In order to achieve the above-mentioned purpose, according to one aspect of the present application, a camera lens is provided, which comprises, in order from the object side to the image side along the optical axis: a first lens having negative refractive power; a second lens having positive refractive power; a third lens having positive refractive power; a fourth lens having negative refractive power; a fifth lens having positive refractive power; and a sixth lens having negative refractive power; wherein half of the diagonal line length of the effective pixel area on the imaging surface ImgH and the maximum field of view FOV of the camera lens satisfy: ImgH*TAN(FOV / 3)≥3.0mm; and the effective focal length f of the camera lens and the center thickness CT1 of the first lens satisfy: f / CT1<3.5.

[0006] Further, the maximum effective radius DT11 of the object side surface of the first lens and the maximum effective radius DT61 of the object side surface of the sixth lens satisfy: 0.8<DT11 / DT61≤1.6.

[0007] Further, the maximum effective radius DT11 of the object side surface of the first lens, the maximum effective radius DT12 of the image side surface of the first lens, and the edge thickness ET1 of the first lens satisfy: 0.7<(DT11-DT12) / ET1<1.5.

[0008] Further, an edge thickness ET1 of the first lens, a sag of the object side surface of the first lens at the maximum effective radius SAG11 and a sag of the image side surface of the first lens at the maximum effective radius SAG12 satisfy: 1.8 < ET1 / (SAG12-SAG11) < 4.5.

[0009] Further, a center thickness CT1 of the first lens, a center thickness CT3 of the third lens and an air separation T12 of the first lens and the second lens on the optical axis satisfy: 1.5 < (CT1+T12) / CT3 < 4.0.

[0010] Further, a center thickness CT1 of the first lens and a center thickness CT3 of the third lens satisfy: 0.8 < CT1 / CT3 < 2.0.

[0011] Further, an edge thickness ET4 of the fourth lens and a sag of the object side surface of the fourth lens at the maximum effective radius SAG41 satisfy: -4.5 < ET4 / SAG41 < -1.5.

[0012] Further, an edge thickness ET4 of the fourth lens and a center thickness CT4 of the fourth lens satisfy: 1.5 < ET4 / CT4 ≤ 2.0.

[0013] Further, a maximum effective radius DT12 of the image side surface of the first lens, a maximum effective radius DT62 of the image side surface of the sixth lens and a maximum effective radius DTs of the aperture stop satisfy: 1.7 ≤ (DT62-DT12) / DTs < 3.0.

[0014] Further, an effective focal length f of the imaging lens and an effective focal length f5 of the fifth lens satisfy: 1.0 ≤ f5 / f < 1.5.

[0015] Further, an effective focal length f of the imaging lens and an effective focal length f6 of the sixth lens satisfy: -3.0 ≤ f6 / f < -1.5.

[0016] Further, an effective focal length f of the imaging lens, an effective focal length f1 of the first lens and an effective focal length f4 of the fourth lens satisfy: -1.0 < f / f1+f / f4 < -0.7.

[0017] Further, an effective focal length f of the imaging lens, an effective focal length f2 of the second lens and an effective focal length f3 of the third lens satisfy: 3.5 < (f2-f3) / f < 7.0.

[0018] Further, an effective focal length f of the imaging lens, a curvature radius R5 of the object side surface of the third lens and a curvature radius R6 of the image side surface of the third lens satisfy: 1.0 ≤ f / (R5+R6) < 3.0.

[0019] Further, the effective focal length f of the camera lens and the radius of curvature R1 of the object side surface of the first lens satisfy: -1.0 < f / R1 < -0.5.

[0020] Further, the effective focal length f of the camera lens, the radius of curvature R3 of the object side surface of the second lens and the radius of curvature R4 of the image side surface of the second lens satisfy: 2.0 < f / (R4-R3) < 4.5.

[0021] Further, the effective focal length f of the camera lens and the radius of curvature R10 of the image side surface of the fifth lens satisfy: -2.1 < f / R10 < -1.3.

[0022] According to another aspect of the present application, a camera lens is provided, which comprises in order from the object side to the image side along the optical axis: a first lens having negative refractive power; a second lens having positive refractive power; a third lens having positive refractive power; a fourth lens having negative refractive power; a fifth lens having positive refractive power; and a sixth lens having negative refractive power; wherein the half of the diagonal length of the effective pixel area on the imaging surface ImgH and the maximum field angle of view FOV of the camera lens satisfy: ImgH*TAN(FOV / 3)≥3.0mm; and the center thickness CT1 of the first lens, the center thickness CT3 of the third lens and the air gap T12 of the first lens and the second lens on the optical axis satisfy: 1.5 < (CT1+T12) / CT3 < 4.0.

[0023] Further, the effective focal length f of the camera lens and the center thickness CT1 of the first lens satisfy: f / CT1 < 3.5; and the maximum effective radius DT11 of the object side surface of the first lens and the maximum effective radius DT61 of the object side surface of the sixth lens satisfy: 0.8 < DT11 / DT61≤1.6.

[0024] Further, the maximum effective radius DT11 of the object side surface of the first lens, the maximum effective radius DT12 of the image side surface of the first lens and the edge thickness ET1 of the first lens satisfy: 0.7 < (DT11-DT12) / ET1 < 1.5.

[0025] Further, the edge thickness ET1 of the first lens, the sag SAG11 of the object side surface of the first lens at the maximum effective radius and the sag SAG12 of the image side surface of the first lens at the maximum effective radius satisfy: 1.8 < ET1 / (SAG12-SAG11) < 4.5.

[0026] Further, the center thickness CT1 of the first lens and the center thickness CT3 of the third lens satisfy: 0.8 < CT1 / CT3 < 2.0.

[0027] Further, an edge thickness ET4 of the fourth lens and a sagittal height SAG41 of the object side surface of the fourth lens at the maximum effective radius satisfy: -4.5 < ET4 / SAG41 < -1.5.

[0028] Further, an edge thickness ET4 of the fourth lens and a central thickness CT4 of the fourth lens satisfy: 1.5 < ET4 / CT4 ≤ 2.0.

[0029] Further, a maximum effective radius DT12 of the image side surface of the first lens, a maximum effective radius DT62 of the image side surface of the sixth lens and a maximum effective radius DTs of the aperture stop satisfy: 1.7 ≤ (DT62-DT12) / DTs < 3.0.

[0030] Further, an effective focal length f of the photographing lens and an effective focal length f5 of the fifth lens satisfy: 1.0 ≤ f5 / f < 1.5.

[0031] Further, an effective focal length f of the photographing lens and an effective focal length f6 of the sixth lens satisfy: -3.0 ≤ f6 / f < -1.5.

[0032] Further, an effective focal length f of the photographing lens, an effective focal length f1 of the first lens and an effective focal length f4 of the fourth lens satisfy: -1.0 < f / f1 + f / f4 < -0.7.

[0033] Further, an effective focal length f of the photographing lens, an effective focal length f2 of the second lens and an effective focal length f3 of the third lens satisfy: 3.5 < (f2-f3) / f < 7.0.

[0034] Further, an effective focal length f of the photographing lens, a curvature radius R5 of the object side surface of the third lens and a curvature radius R6 of the image side surface of the third lens satisfy: 1.0 ≤ f / (R5+R6) < 3.0.

[0035] Further, an effective focal length f of the photographing lens and a curvature radius R1 of the object side surface of the first lens satisfy: -1.0 < f / R1 < -0.5.

[0036] Further, an effective focal length f of the photographing lens, a curvature radius R3 of the object side surface of the second lens and a curvature radius R4 of the image side surface of the second lens satisfy: 2.0 < f / (R4-R3) < 4.5.

[0037] Further, an effective focal length f of the photographing lens and a curvature radius R10 of the image side surface of the fifth lens satisfy: -2.1 < f / R10 < -1.3.

[0038] The technical scheme of the present application is applied to a camera lens which comprises, along the optical axis 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, the first lens has negative refractive power, the second lens has positive refractive power, the third lens has positive refractive power, the fourth lens has negative refractive power, the fifth lens has positive refractive power, and the sixth lens has negative refractive power; wherein the half diagonal length of the effective pixel area on the imaging surface ImgH and the maximum field angle of the camera lens FOV satisfy the condition: ImgH*TAN(FOV / 3) >= 3.0mm; and the effective focal length of the camera lens f and the center thickness of the first lens CT1 satisfy the condition: f / CT1 < 3.5.

[0039] By reasonably distributing the refractive power of each lens, the aberration generated by the camera lens is balanced, and the imaging quality of the camera lens is greatly increased. The first three lenses adopt a negative-positive-positive combination, which can better exhibit the performance of the optical system and effectively meet the effect of a large field angle. By restricting the condition between the half diagonal length of the effective pixel area on the imaging surface ImgH and the maximum field angle of the camera lens FOV, and the ratio between the effective focal length of the camera lens f and the center thickness of the first lens CT1 within a reasonable range, the refractive power of the first lens can be effectively controlled to be negative, the refractive power between each lens can be reasonably distributed, the optical performance can be fully utilized, and the camera lens can be matched with a larger chip to obtain a wider field angle and ensure the ultra-wide-angle characteristics, so that the camera lens can obtain better imaging quality. BRIEF DESCRIPTION OF DRAWINGS

[0040] The drawings accompanying the specification of this application form a part thereof, serve to provide further understanding of the present application, and together with the description of the exemplary embodiments of the present application, serve to explain the present application, and do not constitute improper limitations on the present application. In the drawings:

[0041] Figure 1 A structure schematic diagram of the camera lens of example one of the present application is shown;

[0042] Figures 2 to 5 A structure schematic diagram of the camera lens of example two of the present application is shown; Figure 1 A structure schematic diagram of the camera lens of example three of the present application is shown.

[0043] Figure 6 A structure schematic diagram of the camera lens of example two of the present application is shown;

[0044] Figures 7 to 10 A structure schematic diagram of the camera lens of example three of the present application is shown. Figure 6 A structure schematic diagram of the camera lens of example three of the present application is shown.

[0045] Figure 11 A structure schematic diagram of the camera lens of example three of the present application is shown.

[0046] Figures 12 to 15 axial chromatic aberration curves, astigmatic curves, distortion curves and magnification chromatic aberration curves of the photographing lens in the embodiment 1 are shown respectively; Figure 11

[0047] Figure 16 a structural schematic diagram of the photographing lens of the embodiment 4 of the application is shown;

[0048] Figures 17 to 20 axial chromatic aberration curves, astigmatic curves, distortion curves and magnification chromatic aberration curves of the photographing lens in the embodiment 2 are shown respectively; Figure 16

[0049] Figure 21 a structural schematic diagram of the photographing lens of the embodiment 5 of the application is shown;

[0050] Figures 22 to 25 axial chromatic aberration curves, astigmatic curves, distortion curves and magnification chromatic aberration curves of the photographing lens in the embodiment 3 are shown respectively; Figure 21

[0051] Figure 26 a structural schematic diagram of the photographing lens of the embodiment 6 of the application is shown;

[0052] Figures 27 to 30 axial chromatic aberration curves, astigmatic curves, distortion curves and magnification chromatic aberration curves of the photographing lens in the embodiment 4 are shown respectively. Figure 26

[0053] In the above drawings, the following reference signs are used:

[0054] STO, stop; 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; 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

[0055] It should be noted that the embodiments in the present application and the features in the embodiments can be combined with each other without conflict. The present application will be described in detail below with reference to the drawings and in combination with the embodiments.

[0056] ​​​​It should be noted that all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs unless otherwise specifically defined.

[0057] In the present application, unless otherwise specified, the orientation words such as "upper", "lower", "top", "bottom" are generally directed to the directions shown in the drawings, or are directed to the vertical, perpendicular or gravity directions of the components themselves; similarly, for the convenience of understanding and description, "inner" and "outer" refer to the inner and outer relative to the contour of the components themselves, but the above orientation words are not used to limit the present application.

[0058] It should be noted that the expressions of first, second, third and the like in the present specification are only used to distinguish one feature from another feature, and do not represent any limitation on the features. Therefore, the first lens discussed below can also be referred to as the second lens or the third lens without departing from the teachings of the present application.

[0059] In the drawings, the thickness, size and shape of the lenses have been slightly exaggerated for the convenience of illustration. Specifically, the shapes of the spherical or aspherical surfaces shown in the drawings are shown by way of example. That is, the shapes of the spherical or aspherical surfaces are not limited to the shapes of the spherical or aspherical surfaces shown in the drawings. The drawings are merely examples and are not drawn strictly to scale.

[0060] In this context, the paraxial region refers to the region near the optical axis. If the lens surface is convex and the position of the convex surface is not specified, it means that the lens surface is convex at least in the paraxial region; if the lens surface is concave and the position of the concave surface is not specified, it means that the lens surface is concave at least in the paraxial region. The surface of each lens near the object side is the object side surface of the lens, and the surface of each lens near the image side is the image side surface of the lens. The judgment of the surface shape in the paraxial region can be based on the judgment method of those skilled in the art, with the R value (R refers to the radius of curvature in the paraxial region, usually refers to the R value on the lens data in the optical software) to judge the convexity and concavity. In terms of the object side surface, when the R value is positive, it is determined to be convex, and when the R value is negative, it is determined to be concave; in terms of the image side surface, when the R value is positive, it is determined to be concave, and when the R value is negative, it is determined to be convex.

[0061] In order to solve the problem that it is difficult to simultaneously realize ultra-wide angle and high image quality in the prior art camera lens, the present application provides a camera lens.

[0062] Embodiment one

[0063] As Figures 1 to 30As shown, the camera lens comprises, in sequence from the object side to the image side along the optical axis, a first lens, a second lens, a third lens, a fourth lens, a fifth lens and a sixth lens, the first lens has negative refractive power; the second lens has positive refractive power; the third lens has positive refractive power; the fourth lens has negative refractive power; the fifth lens has positive refractive power; and the sixth lens has negative refractive power; wherein a half of the diagonal line length of the effective pixel area on the imaging surface ImgH and the maximum field angle of the camera lens FOV satisfy: ImgH*TAN(FOV / 3)≥3.0mm; and the effective focal length f of the camera lens and the center thickness CT1 of the first lens satisfy: f / CT1<3.5.

[0064] Preferably, 4.0mm<ImgH*TAN(FOV / 3)<5.0mm.

[0065] Preferably, 1.4<f / CT1<3.5.

[0066] By reasonably distributing the refractive power of each lens, the aberration generated by the camera lens is balanced, and the imaging quality of the camera lens is greatly increased. The first three lenses adopt a negative-positive-positive combination, which can better exhibit the performance of the optical system and effectively meet the effect of a large field angle. By constraining the ratio between the half of the diagonal line length of the effective pixel area on the imaging surface ImgH and the maximum field angle of the camera lens FOV, and the effective focal length f of the camera lens and the center thickness CT1 of the first lens within a reasonable range, the refractive power of the first lens can be effectively controlled to be negative, the refractive power between each lens can be reasonably distributed, the optical performance can be fully utilized, and the camera lens can be matched with a larger chip to obtain a wider field angle, thereby ensuring the super wide angle characteristics, so that the camera lens can obtain better imaging quality.

[0067] In the embodiment, the maximum effective radius DT11 of the object side surface of the first lens and the maximum effective radius DT61 of the object side surface of the sixth lens satisfy: 0.8<DT11 / DT61≤1.6. Satisfying this condition is conducive to controlling the effective radii of the first lens and the sixth lens, so that the optical system has stable assembly process and machinability. Preferably, 1.0≤DT11 / DT61≤1.6.

[0068] In the embodiment, the maximum effective radius DT11 of the object side surface of the first lens, the maximum effective radius DT12 of the image side surface of the first lens, and the edge thickness ET1 of the first lens satisfy: 0.7 < (DT11-DT12) / ET1 < 1.5. Satisfying the condition formula can ensure that the light entering the system can be stably transmitted after refraction by the lens, and is conducive to the arrangement of the first lens and the second lens in the system, reduces the eccentricity sensitivity of the first lens and the second lens, and helps to improve the assembly yield. Preferably, 0.7 < (DT11-DT12) / ET1 < 1.3.

[0069] In the embodiment, the edge thickness ET1 of the first lens, the sag SAG11 of the object side surface of the first lens at the maximum effective radius, and the sag SAG12 of the image side surface of the first lens at the maximum effective radius satisfy: 1.8 < ET1 / (SAG12-SAG11) < 4.5. Satisfying the condition formula is conducive to controlling the relationship between the edge thickness and the sag of the first lens, and can improve the light convergence capability of the first lens, so that the system has the characteristics of a large field of view. Preferably, 3.0 < ET1 / (SAG12-SAG11) < 4.5.

[0070] In the embodiment, the center thickness CT1 of the first lens, the center thickness CT3 of the third lens, and the air gap T12 of the first lens and the second lens on the optical axis satisfy: 1.5 < (CT1+T12) / CT3 < 4.0. Satisfying the condition formula can improve the processability of the lens and reduce the sensitivity of the lens while optimizing the balanced aberration, thereby improving the yield of the system. Preferably, 2.5 < (CT1+T12) / CT3 < 4.0.

[0071] In the embodiment, the center thickness CT1 of the first lens and the center thickness CT3 of the third lens satisfy: 0.8 < CT1 / CT3 < 2.0. Satisfying the condition formula is conducive to controlling the center thickness between the first lens and the third lens, so that the optical system is processable.

[0072] In the embodiment, the edge thickness ET4 of the fourth lens and the sag SAG41 of the object side surface of the fourth lens at the maximum effective radius satisfy: -4.5 < ET4 / SAG41 < -1.5. Satisfying the condition formula can improve the processability of the lens and reduce the sensitivity of the lens while optimizing the balanced aberration, thereby improving the yield of the system. Preferably, -4.2 < ET4 / SAG41 < -1.6.

[0073] In the embodiment, the edge thickness ET4 of the fourth lens and the center thickness CT4 of the fourth lens satisfy: 1.5 < ET4 / CT4 ≤ 2.0. By restricting the ratio between the edge thickness ET4 of the fourth lens and the center thickness CT4 of the fourth lens within a reasonable range, the processability of the fourth lens can be ensured, and meanwhile the stability of assembly is facilitated. Preferably, 1.7 < ET4 / CT4 ≤ 2.0.

[0074] In the embodiment, the maximum effective radius DT12 of the image side of the first lens, the maximum effective radius DT62 of the image side of the sixth lens and the maximum effective radius DTs of the aperture stop satisfy: 1.7 ≤ (DT62-DT12) / DTs < 3.0. By satisfying the condition, in order to ensure the system within a certain aperture range, the size of the light flux entering the system is improved, so that the system can clearly image under the condition of sufficient light, while maintaining a small size design of the system to ensure miniaturization. Preferably, 1.7 ≤ (DT62-DT12) / DTs < 2.8.

[0075] In the embodiment, the effective focal length f of the imaging lens and the effective focal length f5 of the fifth lens satisfy: 1.0 ≤ f5 / f < 1.5. By satisfying the condition, the effective focal length f of the imaging lens and the effective focal length f5 of the fifth lens can be effectively controlled, and the fifth lens is ensured to be a positive lens, so that the optical power can be effectively and reasonably distributed to meet the design requirements of a wide-angle system. Preferably, 1.0 ≤ f5 / f < 1.4.

[0076] In the embodiment, the effective focal length f of the imaging lens and the effective focal length f6 of the sixth lens satisfy: -3.0 ≤ f6 / f < -1.5. By satisfying the condition, the effective focal length f of the imaging lens and the effective focal length f6 of the sixth lens can be effectively controlled, and the sixth lens is ensured to be a negative lens, so that the optical power can be effectively and reasonably distributed to meet the design requirements of a wide-angle system. Preferably, -3.0 ≤ f6 / f < -1.8.

[0077] In the embodiment, the effective focal length f of the imaging lens, the effective focal length f1 of the first lens and the effective focal length f4 of the fourth lens satisfy: -1.0 < f / f1+f / f4 < -0.7. By satisfying the condition, the optical power of the first lens is improved, the sensitivity of the first lens is reduced, and the magnification chromatic aberration of the system is effectively reduced.

[0078] In the embodiment, the effective focal length f of the imaging lens, the effective focal length f2 of the second lens and the effective focal length f3 of the third lens satisfy: 3.5 < (f2-f3) / f < 7.0. By satisfying the condition, the sensitivity of the second lens to eccentricity and thickness is reduced, and the processing performance of the lens is improved. Preferably, 3.6 < (f2-f3) / f < 6.8.

[0079] In this embodiment, the effective focal length f of the camera lens, the radius of curvature R5 of the object side surface of the third lens, and the radius of curvature R6 of the image side surface of the third lens satisfy: 1.0 ≤ f / (R5 + R6) < 3.0. Satisfying this conditional expression is beneficial to improving the optical power of the third lens, reducing the sensitivity of the third lens, and can improve the performance yield of the lens. Preferably, 1.0 ≤ f / (R5 + R6) < 2.6.

[0080] In this embodiment, the effective focal length f of the camera lens and the radius of curvature R1 of the object side surface of the first lens satisfy: -1.0 < f / R1 < -0.5. Satisfying this conditional expression is beneficial to controlling the curvature of the object side surface of the first lens to be negative, can constrain the reasonable distribution of the optical power, and improve the upper limit of the performance of the optical system. Preferably, -0.9 < f / R1 < -0.5.

[0081] In this embodiment, the effective focal length f of the camera lens, the radius of curvature R3 of the object side surface of the second lens, and the radius of curvature R4 of the image side surface of the second lens satisfy: 2.0 < f / (R4 - R3) < 4.5. Satisfying this conditional expression is beneficial to distributing the optical power of the second lens in the entire optical system, can comprehensively balance the field curvature and reduce the lateral chromatic aberration of the system to a certain extent, and is also beneficial to optimizing the processability of the second lens. Preferably, 2.1 < f / (R4 - R3) < 4.4.

[0082] In this embodiment, the effective focal length f of the camera lens and the radius of curvature R10 of the image side surface of the fifth lens satisfy: -2.1 < f / R10 < -1.3. Satisfying this conditional expression is beneficial to optimizing the shape of the fifth lens. By optimizing the shape of the fifth lens, the field curvature of the system can be balanced, and at the same time, the ghost image generated by the reflection related to the fifth lens can be improved.

[0083] Embodiment Two

[0084] As Figures 1 to 30 shown, the camera lens sequentially includes a first lens, a second lens, a third lens, a fourth lens, a fifth lens, and a sixth lens along the optical axis from the object side to the image side. The first lens has a negative optical power; the second lens has a positive optical power; the third lens has a positive optical power; the fourth lens has a negative optical power; the fifth lens has a positive optical power; the sixth lens has a negative optical power. Among them, half of the diagonal length ImgH of the effective pixel area on the imaging surface and the maximum field angle FOV of the camera lens satisfy: ImgH * TAN(FOV / 3) ≥ 3.0 mm; the center thickness CT1 of the first lens, the center thickness CT3 of the third lens, and the air gap T12 between the first lens and the second lens on the optical axis satisfy: 1.5 < (CT1 + T12) / CT3 < 4.0.

[0085] Preferably, 4.0mm < ImgH*TAN(FOV / 3) < 5.0mm.

[0086] Preferably, 2.5 < (CT1+T12) / CT3 < 4.0.

[0087] By reasonably distributing the optical power of each lens, the aberration generated by the camera lens is balanced, and the imaging quality of the camera lens is greatly increased. The front three lenses adopt a negative-positive-positive combination, which can better exhibit the performance of the optical system and can effectively meet the effect of a large field of view. By constraining the conditional expression between half of the diagonal length ImgH of the effective pixel area on the imaging surface and the maximum field of view FOV of the camera lens, the central thickness CT1 of the first lens, the central thickness CT3 of the third lens, and the air gap T12 of the first lens and the second lens on the optical axis, the camera lens can be matched with a larger chip to obtain a wider field of view angle, ensure the super wide angle characteristic, so that the camera lens can obtain better imaging quality, while improving the process of the lens, reducing the sensitivity of the lens, and improving the yield of the system under the premise of optimizing and balancing the aberration.

[0088] In the embodiment, the effective focal length f of the camera lens and the central thickness CT1 of the first lens satisfy: f / CT1 < 3.5. By constraining the ratio between the effective focal length f of the camera lens and the central thickness CT1 of the first lens within a reasonable range, the optical power of the first lens can be effectively controlled to be negative, the optical power between each lens can be reasonably distributed, the optical performance can be fully utilized, and the camera lens can be matched with a larger chip to obtain a wider field of view angle, ensure the super wide angle characteristic, so that the camera lens can obtain better imaging quality. Preferably, 1.4 < f / CT1 < 3.5.

[0089] In the embodiment, the maximum effective radius DT11 of the object side of the first lens and the maximum effective radius DT61 of the object side of the sixth lens satisfy: 0.8 < DT11 / DT61 ≤ 1.6. Satisfying this conditional expression is conducive to controlling the effective radii of the first lens and the sixth lens, so that the optical system has stable assembly process and machinability. Preferably, 1.0 ≤ DT11 / DT61 ≤ 1.6.

[0090] In the embodiment, the maximum effective radius DT11 of the object side surface of the first lens, the maximum effective radius DT12 of the image side surface of the first lens, and the edge thickness ET1 of the first lens satisfy: 0.7 < (DT11-DT12) / ET1 < 1.5. Satisfying the condition formula can ensure that the light entering the system can be stably transmitted after being refracted by the lens, and is conducive to the arrangement of the first lens and the second lens in the system, reduces the eccentricity sensitivity of the first lens and the second lens, and helps to improve the assembly yield. Preferably, 0.7 < (DT11-DT12) / ET1 < 1.3.

[0091] In the embodiment, the edge thickness ET1 of the first lens, the sag SAG11 of the object side surface of the first lens at the maximum effective radius, and the sag SAG12 of the image side surface of the first lens at the maximum effective radius satisfy: 1.8 < ET1 / (SAG12-SAG11) < 4.5. Satisfying the condition formula is conducive to controlling the relationship between the edge thickness and the sag of the first lens, and can improve the light convergence capability of the first lens, so that the system has the characteristics of a large field of view. Preferably, 3.0 < ET1 / (SAG12-SAG11) < 4.5.

[0092] In the embodiment, the center thickness CT1 of the first lens and the center thickness CT3 of the third lens satisfy: 0.8 < CT1 / CT3 < 2.0. Satisfying the condition formula is conducive to controlling the center thickness between the first lens and the third lens, so that the optical system has processability.

[0093] In the embodiment, the edge thickness ET4 of the fourth lens and the sag SAG41 of the object side surface of the fourth lens at the maximum effective radius satisfy: -4.5 < ET4 / SAG41 < -1.5. Satisfying the condition formula can improve the processability of the lens, reduce the sensitivity of the lens, and improve the yield of the system under the premise of optimizing the balance of aberration. Preferably, -4.2 < ET4 / SAG41 < -1.6.

[0094] In the embodiment, the edge thickness ET4 of the fourth lens and the center thickness CT4 of the fourth lens satisfy: 1.5 < ET4 / CT4 ≤ 2.0. By restricting the ratio between the edge thickness ET4 of the fourth lens and the center thickness CT4 of the fourth lens within a reasonable range, the processability of the fourth lens can be ensured, and the stability of the assembly is also conducive. Preferably, 1.7 < ET4 / CT4 ≤ 2.0.

[0095] In the embodiment, the maximum effective radius DT12 of the image side of the first lens, the maximum effective radius DT62 of the image side of the sixth lens, and the maximum effective radius DTs of the aperture stop satisfy 1.7≤(DT62-DT12) / DTs<3.0. Satisfying the condition, the system is ensured within a certain aperture range, the size of the light flux entering the system is improved, the system can clearly image under sufficient light flux conditions, and the system is maintained in a small size design to ensure miniaturization. Preferably, 1.7≤(DT62-DT12) / DTs<2.8.

[0096] In the embodiment, the effective focal length f of the imaging lens and the effective focal length f5 of the fifth lens satisfy 1.0≤f5 / f<1.5. Satisfying the condition, the effective focal length f of the imaging lens and the effective focal length f5 of the fifth lens can be effectively controlled, the fifth lens is ensured to be a positive lens, and the optical power can be effectively and reasonably distributed to meet the design requirements of a wide-angle system. Preferably, 1.0≤f5 / f<1.4.

[0097] In the embodiment, the effective focal length f of the imaging lens and the effective focal length f6 of the sixth lens satisfy -3.0≤f6 / f<-1.5. Satisfying the condition, the effective focal length f of the imaging lens and the effective focal length f6 of the sixth lens can be effectively controlled, the sixth lens is ensured to be a negative lens, and the optical power can be effectively and reasonably distributed to meet the design requirements of a wide-angle system. Preferably, -3.0≤f6 / f<-1.8.

[0098] In the embodiment, the effective focal length f of the imaging lens, the effective focal length f1 of the first lens, and the effective focal length f4 of the fourth lens satisfy -1.0<f / f1+f / f4<-0.7. Satisfying the condition, the optical power of the first lens is improved, the sensitivity of the first lens is reduced, and the magnification chromatic aberration of the system can be effectively reduced.

[0099] In the embodiment, the effective focal length f of the imaging lens, the effective focal length f2 of the second lens, and the effective focal length f3 of the third lens satisfy 3.5<(f2-f3) / f<7.0. Satisfying the condition, the sensitivity of the second lens to decentration and thickness is reduced, and the processing performance of the lens is improved. Preferably, 3.6<(f2-f3) / f<6.8.

[0100] In the embodiment, the effective focal length f of the imaging lens, the curvature radius R5 of the object side of the third lens, and the curvature radius R6 of the image side of the third lens satisfy 1.0≤f / (R5+R6)<3.0. Satisfying the condition, the optical power of the third lens is improved, the sensitivity of the third lens is reduced, and the performance yield of the lens is improved. Preferably, 1.0≤f / (R5+R6)<2.6.

[0101] In the embodiment, the effective focal length f of the camera lens and the radius of curvature R1 of the object side surface of the first lens satisfy -1.0 < f / R1 < -0.5. Satisfying the condition formula is conducive to controlling the curvature of the object side surface of the first lens to be negative, can constrain the power to be reasonably distributed, and improve the performance upper limit of the optical system. Preferably, -0.9 < f / R1 < -0.5.

[0102] In the embodiment, the effective focal length f of the camera lens, the radius of curvature R3 of the object side surface of the second lens, and the radius of curvature R4 of the image side surface of the second lens satisfy 2.0 < f / (R4-R3) < 4.5. Satisfying the condition formula is conducive to distributing the power of the second lens in the entire optical system, can comprehensively balance the field curvature and reduce the sagittal chromatic aberration of the system to a certain extent, and is conducive to optimizing the process of the second lens. Preferably, 2.1 < f / (R4-R3) < 4.4.

[0103] In the embodiment, the effective focal length f of the camera lens and the radius of curvature R10 of the image side surface of the fifth lens satisfy -2.1 < f / R10 < -1.3. Satisfying the condition formula is conducive to optimizing the shape of the fifth lens, and the field curvature of the system can be balanced by optimizing the shape of the fifth lens, and the ghost generated by the reflection related to the fifth lens is improved.

[0104] Optionally, the camera lens described above can further include a filter for correcting color deviation or a protective glass for protecting the photosensitive element located on the imaging surface.

[0105] The camera lens in the present application can adopt multiple lenses, for example, six lenses as described above. By reasonably distributing the power of each lens, the surface shape, the central thickness of each lens, and the on-axis distance between each lens, etc., the aperture of the camera lens 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 is more conducive to production and processing and can be applied to portable electronic devices such as smart phones.

[0106] In the present application, at least one of the lens surfaces of each lens is a non-spherical surface. The characteristic of the aspherical lens is that the curvature is continuously changed from the center of the lens to the periphery of the lens. Unlike the spherical lens with constant curvature from the center of the lens to the periphery of the lens, the aspherical lens has better curvature radius characteristics, has the advantages of improving distortion aberration and improving astigmatism aberration. After using the aspherical lens, the aberration that occurs during imaging can be eliminated as much as possible, thereby improving the imaging quality.

[0107] However, those skilled in the art will understand that the number of lenses constituting the photographing lens can be changed without departing from the technical solutions claimed in the present application, to obtain the various results and advantages described in the present specification. For example, although described in the embodiments by way of example of six lenses, the photographing lens is not limited to including six lenses. If necessary, the photographing lens can also include other numbers of lenses.

[0108] The specific surface shapes and parameters of the photographing lens applicable to the above-described embodiments are further described below with reference to the accompanying drawings.

[0109] It should be noted that any one of the following examples one to six is applicable to all embodiments of the present application.

[0110] Example One

[0111] As shown in FIG. 1, a photographing lens of Example One of the present application is described. Figures 1 to 5 A schematic diagram of the photographing lens structure of Example One is shown in FIG. 2. Figure 1 A schematic diagram of the photographing lens structure of Example One is shown in FIG. 2.

[0112] As shown in FIG. 1, a photographing lens of Example One of the present application is described. Figure 1 The photographing lens includes, in order from the object side to the image side, a first lens E1, a second lens E2, a stop STO, a third lens E3, a fourth lens E4, a fifth lens E5, a sixth lens E6, a filter E7, and an imaging surface S15.

[0113] The first lens E1 has a negative refractive power, the object side surface S1 of the first lens is a concave surface, and the image side surface S2 of the first lens is a concave surface. The second lens E2 has a positive refractive power, the object side surface S3 of the second lens is a convex surface, and the image side surface S4 of the second lens is a concave surface. The third lens E3 has a positive refractive power, the object side surface S5 of the third lens is a convex surface, and the image side surface S6 of the third lens is a convex surface. The fourth lens E4 has a negative refractive power, the object side surface S7 of the fourth lens is a convex surface, and the image side surface S8 of the fourth lens is a concave surface. The fifth lens E5 has a positive refractive power, the object side surface S9 of the fifth lens is a concave surface, and the image side surface S10 of the fifth lens is a convex surface. The sixth lens E6 has a negative refractive power, the object side surface S11 of the sixth lens is a convex surface, and the image side surface S12 of the sixth lens is a concave surface. The filter E7 has an object side surface S13 and an image side surface S14 of the filter. Light from an object passes through each surface S1 to S14 in order and is finally imaged on the imaging surface S15.

[0114] In the present example, the total effective focal length f of the photographing lens is 2.11 mm, and the maximum field of view FOV of the photographing lens is 125.3°.

[0115] Table 1 shows a basic structure parameter table of the photographing lens of Example One, wherein the units of the curvature radius, the thickness / distance, the focal length, and the effective radius are all millimeters (mm).

[0116]

[0117] Table 1

[0118] In Example One, the object side surface and the image side surface of any one of the first lens E1 to the sixth lens E6 are aspherical surfaces, and the surface shape of each aspherical surface can be defined by, but not limited to, the following aspherical surface formula:

[0119]

[0120] wherein x is the sag of the aspherical surface at a position along the optical axis at a height of h from the vertex of the aspherical surface; c is the paraxial curvature of the aspherical surface, c = 1 / R (i.e., the paraxial curvature c is the inverse of the curvature radius R in Table 1 above); k is the conic constant; and Ai is the correction coefficient of the i-th order of the aspherical surface. Table 2 below provides the high-order term coefficients A4, A6, A8, A10, A12, A14, A16, A18, A20, A22, A24, A26, A28, A30 that can be used for the aspherical surfaces S1-S12 in Example One.

[0121] Face number A4 A6 A8 A10 A12 A14 A16 S1 1.9494E-01 -1.6162E-01 1.3297E-01 -9.0865E-02 4.7612E-02 -1.8513E-02 5.2644E-03 S2 2.8801E-01 -2.6997E-01 -3.3683E-03 1.5304E+00 -5.6392E+00 1.1555E+01 -1.5363E+01 S3 8.0197E-02 -1.6638E-01 -6.6183E-01 5.5442E+00 -1.3736E+01 -2.6246E+01 2.9357E+02 S4 1.0303E-01 -2.5764E+00 4.1308E+01 -4.2315E+02 2.9155E+03 -1.3919E+04 4.6974E+04 S5 -5.9951E-03 -3.6246E-02 4.6978E-01 -2.3845E+00 5.9321E+00 -8.7523E+00 8.4028E+00 S6 -1.7211E-01 -4.4331E-01 1.3182E+01 -1.5240E+02 1.1015E+03 -5.3980E+03 1.8592E+04 S7 -4.6734E-01 1.8732E+00 -1.7537E+01 1.3314E+02 -7.0709E+02 2.6675E+03 -7.2849E+03 S8 -2.4688E-01 2.5711E-01 -1.0373E-01 -2.2328E-01 6.8217E-01 -1.0223E+00 9.6536E-01 S9 1.1804E-01 -2.9448E-01 4.0666E-01 1.7952E-02 -1.1141E+00 2.2083E+00 -2.4413E+00 S10 1.8906E-01 -4.4490E-01 7.6930E-01 -7.3229E-01 1.4079E-01 6.5064E-01 -1.0466E+00 S11 -1.8085E-01 -2.7638E-01 6.1958E-01 -6.2438E-01 3.9413E-01 -1.6947E-01 5.1343E-02 S12 -6.0047E-01 4.4650E-01 -2.4926E-01 1.0012E-01 -2.8980E-02 6.0662E-03 -9.1733E-04 Face number A18 A20 A22 A24 A26 A28 A30 S1 -1.0837E-03 1.5933E-04 -1.6335E-05 1.1162E-06 -4.6530E-08 9.6731E-10 -4.8018E-12 S2 1.3919E+01 -8.7560E+00 3.8265E+00 -1.1403E+00 2.2108E-01 -2.5149E-02 1.2736E-03 S3 -9.9738E+02 1.9612E+03 -2.4724E+03 2.0303E+03 -1.0522E+03 3.1282E+02 -4.0690E+01 S4 -1.1344E+05 1.9829E+05 -2.5673E+05 2.5693E+05 -2.0404E+05 1.1661E+05 -3.3727E+04 S5 -5.4986E+00 2.5028E+00 -7.9314E-01 1.7170E-01 -2.4212E-02 2.0036E-03 -7.3780E-05 S6 -4.5869E+04 8.1567E+04 -1.0382E+05 9.2351E+04 -5.4563E+04 1.9237E+04 -3.0615E+03 S7 1.4545E+04 -2.1237E+04 2.2429E+04 -1.6684E+04 8.2930E+03 -2.4724E+03 3.3423E+02 S8 -6.0515E-01 2.5660E-01 -7.3454E-02 1.3845E-02 -1.6192E-03 1.0332E-04 -2.5734E-06 S9 1.7739E+00 -8.8612E-01 3.0664E-01 -7.2272E-02 1.1072E-02 -9.9394E-04 3.9671E-05 S10 8.8277E-01 -4.8336E-01 1.7950E-01 -4.4907E-02 7.2433E-03 -6.7936E-04 2.8114E-05 S11 -1.1121E-02 1.7270E-03 -1.9051E-04 1.4560E-05 -7.3247E-07 2.1798E-08 -2.9049E-10 S12 9.8961E-05 -7.3738E-06 3.5254E-07 -8.7161E-09 -1.6740E-11 6.5922E-12 -1.1614E-13

[0122] Table 2

[0123] Figure 2 An axial chromatic aberration curve of the camera lens of Example One is shown, which represents the deviation of convergent focal points of light rays of different wavelengths after passing through the camera lens. Figure 3 An astigmatism curve of the camera lens of Example One is shown, which represents the meridional image surface curvature and the sagittal image surface curvature. Figure 4 A distortion curve of the camera lens of Example One is shown, which represents the distortion size values corresponding to different field angles. Figure 5 A lateral chromatic aberration curve of the camera lens of Example One is shown, which represents the deviation of light rays on the imaging surface after passing through the camera lens at different image heights.

[0124] According to Figures 2 to 5 It can be seen that the camera lens provided in Example One can achieve good imaging quality.

[0125] Example Two

[0126] As Figures 6 to 10 shown, the camera lens of Example Two of the present application is described. In this example and the following examples, for the sake of brevity, some similar descriptions as in Example One will be omitted. Figure 6 A schematic diagram of the structure of the camera lens of Example Two is shown.

[0127] As Figure 6As shown, the camera lens sequentially includes, from the object side to the image side: a first lens E1, a second lens E2, a stop STO, a third lens E3, a fourth lens E4, a fifth lens E5, a sixth lens E6, a filter E7, and an imaging surface S15.

[0128] The first lens E1 has a negative focal power, the object side surface S1 of the first lens is concave, and the image side surface S2 of the first lens is concave. The second lens E2 has a positive focal power, the object side surface S3 of the second lens is convex, and the image side surface S4 of the second lens is concave. The third lens E3 has a positive focal power, the object side surface S5 of the third lens is convex, and the image side surface S6 of the third lens is convex. The fourth lens E4 has a negative focal power, the object side surface S7 of the fourth lens is convex, and the image side surface S8 of the fourth lens is concave. The fifth lens E5 has a positive focal power, the object side surface S9 of the fifth lens is concave, and the image side surface S10 of the fifth lens is convex. The sixth lens E6 has a negative focal power, the object side surface S11 of the sixth lens is convex, and the image side surface S12 of the sixth lens is concave. The filter E7 has an object side surface S13 and an image side surface S14. Light from an object sequentially passes through the surfaces S1 to S14 and is finally imaged on the imaging surface S15.

[0129] In this example, the total effective focal length f of the camera lens is 1.81 mm, and the maximum field of view FOV of the camera lens is 151.2°.

[0130] Table 3 shows a basic structure parameter table of the camera lens of Example Two, wherein the units of the radius of curvature, the thickness / distance, the focal length, and the effective radius are all millimeters (mm).

[0131]

[0132] Table 3

[0133] Table 4 shows the high-order term coefficients of the aspherical surfaces that can be used in Example Two, wherein each aspherical surface type can be defined by the formula (1) given in Example One above.

[0134]

[0135]

[0136] Table 4

[0137] Figure 7 An axial chromatic aberration curve of the camera lens of Example Two is shown, which represents the convergence point deviation of light rays of different wavelengths after passing through the camera lens. Figure 8 An astigmatism curve of the camera lens of Example Two is shown, which represents the meridional image surface curvature and the sagittal image surface curvature. Figure 9 A distortion curve of the camera lens of Example Two is shown, which represents the distortion size values corresponding to different field angles.Figure 10 The magnification chromatic aberration curve of the camera lens of Example Two is shown, which represents the deviation of light rays at different image heights on the imaging plane after passing through the camera lens.

[0138] According to Figures 7 to 10 It can be seen that the camera lens of Example Two can achieve good imaging quality.

[0139] Example Three

[0140] As Figures 11 to 15 shown, the camera lens of Example Three of the present application is described. Figure 11 A schematic diagram of the camera lens structure of Example Three is shown.

[0141] As Figure 11 shown, the camera lens sequentially includes, from the object side to the image side: a first lens E1, a second lens E2, a stop STO, a third lens E3, a fourth lens E4, a fifth lens E5, a sixth lens E6, a filter E7, and an imaging plane S15.

[0142] The first lens E1 has a negative focal power, the object side surface S1 of the first lens is concave, and the image side surface S2 of the first lens is concave. The second lens E2 has a positive focal power, the object side surface S3 of the second lens is convex, and the image side surface S4 of the second lens is concave. The third lens E3 has a positive focal power, the object side surface S5 of the third lens is convex, and the image side surface S6 of the third lens is convex. The fourth lens E4 has a negative focal power, the object side surface S7 of the fourth lens is concave, and the image side surface S8 of the fourth lens is concave. The fifth lens E5 has a positive focal power, the object side surface S9 of the fifth lens is concave, and the image side surface S10 of the fifth lens is convex. The sixth lens E6 has a negative focal power, the object side surface S11 of the sixth lens is convex, and the image side surface S12 of the sixth lens is concave. The filter E7 has a filter object side surface S13 and a filter image side surface S14. Light from the object sequentially passes through each surface S1 to S14 and is finally imaged on the imaging plane S15.

[0143] In this example, the total effective focal length f of the camera lens is 1.64 mm, and the maximum field of view FOV of the camera lens is 159.0°.

[0144] Table 5 shows the basic structural parameter table of the camera lens of Example Three, wherein the units of curvature radius, thickness / distance, focal length, and effective radius are all millimeters (mm).

[0145]

[0146] Table 5

[0147] Table 6 shows the high-order term coefficients that can be used for each aspherical surface in Example Three, wherein each aspherical surface type can be defined by the formula (1) given in Example One above.

[0148]

[0149]

[0150] Table 6

[0151] Figure 12 An axial chromatic aberration curve of the camera lens of Example Three is shown, which represents the convergence point deviation of light rays of different wavelengths after passing through the camera lens. Figure 13 An astigmatism curve of the camera lens of Example Three is shown, which represents the meridional image curvature and sagittal image curvature. Figure 14 A distortion curve of the camera lens of Example Three is shown, which represents the distortion size values corresponding to different field angles. Figure 15 A lateral chromatic aberration curve of the camera lens of Example Three is shown, which represents the deviation of light rays on the imaging plane at different image heights after passing through the camera lens.

[0152] According to Figures 12 to 15 It can be seen that the camera lens of Example Three can achieve good imaging quality.

[0153] Example Four

[0154] As Figures 16 to 20 shown, the camera lens of Example Four of the present application is described. Figure 16 A schematic diagram of the camera lens structure of Example Four is shown.

[0155] As Figure 16 shown, the camera lens sequentially includes, from the object side to the image side: a first lens E1, a second lens E2, a stop STO, a third lens E3, a fourth lens E4, a fifth lens E5, a sixth lens E6, a filter E7, and an imaging plane S15.

[0156] The first lens E1 has a negative focal power, the object side surface S1 of the first lens is concave, and the image side surface S2 of the first lens is concave. The second lens E2 has a positive focal power, the object side surface S3 of the second lens is convex, and the image side surface S4 of the second lens is concave. The third lens E3 has a positive focal power, the object side surface S5 of the third lens is convex, and the image side surface S6 of the third lens is convex. The fourth lens E4 has a negative focal power, the object side surface S7 of the fourth lens is concave, and the image side surface S8 of the fourth lens is concave. The fifth lens E5 has a positive focal power, the object side surface S9 of the fifth lens is concave, and the image side surface S10 of the fifth lens is convex. The sixth lens E6 has a negative focal power, the object side surface S11 of the sixth lens is convex, and the image side surface S12 of the sixth lens is concave. The filter E7 has a filter object side surface S13 and a filter image side surface S14. Light from the object sequentially passes through each surface S1 to S14 and is finally imaged on the imaging plane S15.

[0157] In the present example, the total effective focal length f of the camera lens is 1.67 mm, and the maximum field of view FOV of the camera lens is 156.0°.

[0158] Table 7 shows the basic structural parameter table of the camera lens of Example Four, wherein the units of the radius of curvature, thickness / distance, focal length and effective radius are all millimeters (mm).

[0159]

[0160] Table 7

[0161] Table 8 shows the high-order term coefficients of the aspherical surfaces that can be used in the camera lens of Example Four, wherein each aspherical surface type can be defined by the formula (1) given in Example One above.

[0162]

[0163]

[0164] Table 8

[0165] Figure 17 The on-axis chromatic aberration curve of the camera lens of Example Four is shown, which represents the convergence point deviation of light rays of different wavelengths after passing through the camera lens. Figure 18 The astigmatism curve of the camera lens of Example Four is shown, which represents the meridional image surface curvature and sagittal image surface curvature. Figure 19 The distortion curve of the camera lens of Example Four is shown, which represents the distortion size values corresponding to different field angles. Figure 20 The relative aperture chromatic aberration curve of the camera lens of Example Four is shown, which represents the deviation of light rays on the imaging surface after passing through the camera lens.

[0166] According to Figures 17 to 20 It can be seen that the camera lens given in Example Four can achieve good imaging quality.

[0167] Example Five

[0168] As Figures 21 to 25 shown, the camera lens of Example Five of the present application is described. Figure 21 The schematic diagram of the camera lens structure of Example Five is shown.

[0169] As Figure 21 shown, the camera lens sequentially includes, from the object side to the image side: a first lens E1, a second lens E2, a stop STO, a third lens E3, a fourth lens E4, a fifth lens E5, a sixth lens E6, a filter E7 and an imaging surface S15.

[0170] The first lens E1 has negative refractive power, the object side surface S1 of the first lens is concave, and the image side surface S2 of the first lens is concave. The second lens E2 has positive refractive power, the object side surface S3 of the second lens is convex, and the image side surface S4 of the second lens is concave. The third lens E3 has positive refractive power, the object side surface S5 of the third lens is convex, and the image side surface S6 of the third lens is convex. The fourth lens E4 has negative refractive power, the object side surface S7 of the fourth lens is concave, and the image side surface S8 of the fourth lens is concave. The fifth lens E5 has positive refractive power, the object side surface S9 of the fifth lens is concave, and the image side surface S10 of the fifth lens is convex. The sixth lens E6 has negative refractive power, the object side surface S11 of the sixth lens is convex, and the image side surface S12 of the sixth lens is concave. The filter E7 has the object side surface S13 and the image side surface S14 of the filter. The light from the object sequentially passes through the surfaces S1 to S14 and is finally imaged on the imaging surface S15.

[0171] In this example, the total effective focal length f of the photographing lens is 1.64 mm, and the maximum field of view FOV of the photographing lens is 155.6°.

[0172] Table 9 shows the basic structure parameter table of the photographing lens of Example Five, wherein the units of the radius of curvature, the thickness / distance, the focal length and the effective radius are millimeter (mm).

[0173]

[0174]

[0175] Table 9

[0176] Table 10 shows the high order term coefficients of the aspheric surfaces that can be used in Example Five, wherein each aspheric surface can be defined by the formula (1) given in Example One.

[0177] Face number A4 A6 A8 A10 A12 A14 A16 S1 1.4285E-01 -8.5601E-02 4.5243E-02 -1.8894E-02 6.0011E-03 -1.4331E-03 2.5638E-04 S2 1.3887E-01 2.2684E-01 -1.3286E+00 3.7608E+00 -7.0335E+00 9.1966E+00 -8.6081E+00 S3 7.3771E-02 1.2483E+00 -2.0869E+01 1.8594E+02 -1.0843E+03 4.3437E+03 -1.2300E+04 S4 1.8987E-01 -6.0235E+00 1.4467E+02 -2.2439E+03 2.4003E+04 -1.8367E+05 1.0246E+06 S5 9.1164E-03 4.8682E-02 -5.7500E-01 2.4491E+00 -7.0484E+00 1.3155E+01 -1.5983E+01 S6 -9.7788E-02 -1.8008E+00 4.2742E+01 -5.5035E+02 4.5108E+03 -2.4974E+04 9.6392E+04 S7 -5.5274E-01 2.5157E+00 -2.8102E+01 2.5992E+02 -1.6817E+03 7.6073E+03 -2.4479E+04 S8 -3.3903E-01 5.4839E-01 -5.6728E-01 -2.5408E-01 2.6907E+00 -6.2099E+00 8.3313E+00 S9 2.8939E-02 -2.1824E-01 6.0995E-01 -1.0706E+00 1.2087E+00 -8.8095E-01 4.0757E-01 S10 9.8269E-02 -3.1152E-01 1.1623E+00 -2.7661E+00 4.5420E+00 -5.3911E+00 4.7005E+00 S11 -3.0238E-01 1.1199E-02 3.6556E-01 -5.8741E-01 5.1927E-01 -3.0470E-01 1.2521E-01 S12 -5.5560E-01 4.9807E-01 -3.5794E-01 1.9147E-01 -7.5626E-02 2.1981E-02 -4.6827E-03 Face number A18 A20 A22 A24 A26 A28 A30 S1 -3.4222E-05 3.3794E-06 -2.4273E-07 1.2297E-08 -4.1560E-10 8.3957E-12 -7.6564E-14 S2 5.8298E+00 -2.8587E+00 1.0041E+00 -2.4608E-01 3.9917E-02 -3.8482E-03 1.6675E-04 S3 2.4978E+04 -3.6462E+04 3.7887E+04 -2.7305E+04 1.2956E+04 -3.6353E+03 4.5657E+02 S4 -4.1968E+06 1.2586E+07 -2.7259E+07 4.1436E+07 -4.1880E+07 2.5247E+07 -6.8630E+06 S5 1.3002E+01 -7.2276E+00 2.7586E+00 -7.1200E-01 1.1886E-01 -1.1593E-02 5.0197E-04 S6 -2.6373E+05 5.1381E+05 -7.0694E+05 6.7020E+05 -4.1601E+05 1.5202E+05 -2.4770E+04 S7 5.6620E+04 -9.4244E+04 1.1173E+05 -9.1913E+04 4.9794E+04 -1.5958E+04 2.2893E+03 S8 -7.3030E+00 4.3409E+00 -1.7646E+00 4.8377E-01 -8.5603E-02 8.8357E-03 -4.0438E-04 S9 -1.0740E-01 6.6224E-03 5.8439E-03 -2.2727E-03 3.9964E-04 -3.6286E-05 1.3756E-06 S10 -3.0240E+00 1.4284E+00 -4.8717E-01 1.1614E-01 -1.8275E-02 1.6993E-03 -7.0534E-05 S11 -3.6615E-02 7.6295E-03 -1.1215E-03 1.1344E-04 -7.5056E-06 2.9227E-07 -5.0763E-09 S12 7.2616E-04 -8.0993E-05 6.3686E-06 -3.4118E-07 1.1722E-08 -2.2937E-10 1.8968E-12

[0178] Table 10

[0179] Figure 22 The axial chromatic aberration curve of the photographing lens of Example Five is shown, which represents the deviation of the converging focal points of light rays of different wavelengths after passing through the photographing lens. Figure 23 The astigmatism curve of the photographing lens of Example Five is shown, which represents the meridional image surface curvature and sagittal image surface curvature. Figure 24 The distortion curve of the photographing lens of Example Five is shown, which represents the distortion size values corresponding to different field angles. Figure 25 The magnification chromatic aberration curve of the photographing lens of Example Five is shown, which represents the deviation of the light rays on the imaging surface after passing through the photographing lens.

[0180] According to Figures 22 to 25It can be seen that the camera lens given in Example Five can achieve good imaging quality.

[0181] Example Six

[0182] As shown in Figures 26 to 30 , a camera lens of Example Six of the present application is described. Figure 26 A schematic diagram of the camera lens structure of Example Six is shown.

[0183] As shown in Figure 26 , the camera lens comprises, in order from the object side to the image side, a first lens E1, a second lens E2, a stop STO, a third lens E3, a fourth lens E4, a fifth lens E5, a sixth lens E6, a filter E7, and an imaging surface S15.

[0184] The first lens E1 has negative refractive power, the object side surface S1 of the first lens is concave, and the image side surface S2 of the first lens is concave. The second lens E2 has positive refractive power, the object side surface S3 of the second lens is convex, and the image side surface S4 of the second lens is concave. The third lens E3 has positive refractive power, the object side surface S5 of the third lens is convex, and the image side surface S6 of the third lens is convex. The fourth lens E4 has negative refractive power, the object side surface S7 of the fourth lens is convex, and the image side surface S8 of the fourth lens is concave. The fifth lens E5 has positive refractive power, the object side surface S9 of the fifth lens is concave, and the image side surface S10 of the fifth lens is convex. The sixth lens E6 has negative refractive power, the object side surface S11 of the sixth lens is convex, and the image side surface S12 of the sixth lens is concave. The filter E7 has an object side surface S13 and an image side surface S14. Light from an object passes through each surface S1 to S14 in order and is finally imaged on the imaging surface S15.

[0185] In the present example, the total effective focal length f of the camera lens is 2.10 mm, and the maximum field of view FOV of the camera lens is 125.3°.

[0186] Table 11 shows the basic structural parameter table of the camera lens of Example Six, wherein the units of the curvature radius, thickness / distance, focal length, and effective radius are millimeters (mm).

[0187]

[0188]

[0189] Table 11

[0190] Table 12 shows the high-order term coefficients that can be used for each aspherical surface in Example Six, wherein each aspherical surface type can be defined by the formula (1) given in Example One above.

[0191] Face number A4 A6 A8 A10 A12 A14 A16 S1 1.9185E-01 -1.5388E-01 1.1803E-01 -7.2148E-02 3.2346E-02 -1.0062E-02 1.9968E-03 S2 2.8497E-01 -2.5351E-01 -1.0880E-01 1.8541E+00 -6.2675E+00 1.2369E+01 -1.6044E+01 S3 7.7588E-02 -6.8781E-02 -2.0153E+00 1.6134E+01 -6.8945E+01 1.7507E+02 -2.3139E+02 S4 9.6291E-02 -2.3011E+00 3.5290E+01 -3.4323E+02 2.2224E+03 -9.8247E+03 3.0195E+04 S5 -5.3468E-03 -2.8466E-02 4.3257E-01 -2.2987E+00 5.7591E+00 -8.4594E+00 8.0497E+00 S6 -1.6335E-01 -3.9230E-01 1.2519E+01 -1.5393E+02 1.1749E+03 -6.0454E+03 2.1762E+04 S7 -4.8163E-01 1.9529E+00 -1.8796E+01 1.4586E+02 -7.8988E+02 3.0339E+03 -8.4220E+03 S8 -2.6012E-01 2.5472E-01 1.2098E-02 -6.5260E-01 1.6448E+00 -2.4810E+00 2.4954E+00 S9 1.3220E-01 -3.4314E-01 5.0579E-01 -9.7939E-02 -1.0813E+00 2.3361E+00 -2.6826E+00 S10 1.9868E-01 -4.9610E-01 9.2678E-01 -1.1175E+00 8.3273E-01 -2.1934E-01 -2.8210E-01 S11 -1.7052E-01 -2.9553E-01 6.2118E-01 -6.0160E-01 3.6676E-01 -1.5279E-01 4.4966E-02 S12 -5.8685E-01 4.1893E-01 -2.2192E-01 8.3919E-02 -2.2699E-02 4.3936E-03 -6.0378E-04 Face number A18 A20 A22 A24 A26 A28 A30 S1 -1.8634E-04 -1.6692E-05 8.1668E-06 -1.2484E-06 1.0396E-07 -4.7150E-09 9.1640E-11 S2 1.4247E+01 -8.8033E+00 3.7837E+00 -1.1100E+00 2.1205E-01 -2.3785E-02 1.1888E-03 S3 -7.1209E+00 6.0819E+02 -1.1480E+03 1.1262E+03 -6.4427E+02 2.0365E+02 -2.7586E+01 S4 -6.5799E+04 1.0735E+05 -1.5014E+05 2.0385E+05 -2.3678E+05 1.7673E+05 -5.8440E+04 S5 -5.2096E+00 2.3419E+00 -7.3211E-01 1.5614E-01 -2.1660E-02 1.7600E-03 -6.3485E-05 S6 -5.5903E+04 1.0314E+05 -1.3574E+05 1.2441E+05 -7.5476E+04 2.7233E+04 -4.4218E+03 S7 1.7061E+04 -2.5228E+04 2.6928E+04 -2.0205E+04 1.0112E+04 -3.0307E+03 4.1136E+02 S8 -1.7300E+00 8.3886E-01 -2.8445E-01 6.6210E-02 -1.0098E-02 9.1026E-04 -3.6817E-05 S9 2.0019E+00 -1.0228E+00 3.6137E-01 -8.6880E-02 1.3571E-02 -1.2417E-03 5.0505E-05 S10 4.0910E-01 -2.7574E-01 1.1564E-01 -3.1458E-02 5.4007E-03 -5.3183E-04 2.2888E-05 S11 -9.4774E-03 1.4331E-03 -1.5391E-04 1.1442E-05 -5.5886E-07 1.6105E-08 -2.0707E-10 S12 5.7288E-05 -3.4753E-06 1.0169E-07 1.8856E-09 -2.8522E-10 9.8861E-12 -1.2446E-13

[0192] Table 12

[0193] Figure 27 An axial chromatic aberration curve of the camera lens of Example Six is shown, which represents the convergence point deviation of light rays of different wavelengths after passing through the camera lens. Figure 28 An astigmatism curve of the camera lens of Example Six is shown, which represents the meridional image surface curvature and sagittal image surface curvature. Figure 29 A distortion curve of the camera lens of Example Six is shown, which represents the distortion size values corresponding to different field angles. Figure 30 A lateral chromatic aberration curve of the camera lens of Example Six is shown, which represents the deviation of light rays on the imaging surface at different image heights after passing through the camera lens.

[0194] According to Figures 27 to 30 It can be seen that the camera lens of Example Six can achieve good imaging quality.

[0195] In summary, Examples One to Six respectively satisfy the relationships shown in Table 13.

[0196]

[0197]

[0198] Table 13 Table 14 gives the effective focal length f of the camera lens of Examples One to Six, the effective focal length f1 to f6 of each lens, etc.

[0199] Parameter / Example 1 2 3 4 5 6 f1 (mm) -4.70 -3.28 -3.35 -2.91 -3.08 -4.63 f2 (mm) 16.75 10.12 8.38 8.06 8.52 15.99 f3 (mm) 2.45 2.23 2.33 2.03 2.10 2.41 f4 (mm) -6.29 -5.54 -4.15 -4.63 -4.91 -5.98 f5 (mm) 2.18 2.09 2.17 2.28 2.24 2.20 f6 (mm) -3.91 -4.05 -4.84 -3.72 -3.67 -4.06 f (mm) 2.11 1.81 1.64 1.67 1.64 2.10 FOV (°) 125.3 151.2 159.0 156.0 155.6 125.3

[0200] Table 14

[0201] The present application also provides an imaging device, the electronic photosensitive element of which can be a charge coupled device (CCD) or a complementary metal oxide semiconductor (CMOS). The imaging device can be a standalone imaging apparatus such as a digital camera, or an imaging module integrated on a mobile electronic device such as a mobile phone. The imaging device is equipped with the camera lens described above.

[0202] Obviously, the above-described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by a person of ordinary skill in the art without creative work should fall within the protection scope of the present application.

[0203] It is to be understood that the terminology used herein is for the purpose of describing specific embodiments only and is not intended to be limiting of example embodiments in accordance with the present application. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. It will be further understood that the terms "comprises" and / or "comprising," when used in this specification, specify the presence of stated features, steps, operations, devices, components and / or combinations thereof, but do not preclude the presence or addition of one or more other features, steps, operations, devices, components and / or combinations thereof.

[0204] It should be noted that the terms "first", "second", and the like, herein do not necessarily have an ordinal meaning. Rather, such terms are used to distinguish a like feature from another feature in the specification. It should be understood that like reference numerals are used throughout the disclosure to indicate like elements, features or steps unless otherwise noted.

[0205] The preferred embodiments of the application are described above in detail. The application is not limited to the embodiments described above, but can vary and be modified within the scope of the application. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the application should be included in the scope of the application.

Claims

1. A camera lens, characterized in that, The camera lens consists of six lenses, which are arranged sequentially along the optical axis from the object side to the image side as follows: A first lens, the first lens having negative optical power; A second lens, the second lens having positive optical power; A third lens, wherein the third lens has positive optical power; A fourth lens, wherein the fourth lens has negative optical power; The fifth lens has positive optical power; A sixth lens, wherein the sixth lens has negative optical power; The object-side surface of the first lens is concave, and the image-side surface of the first lens is concave; the object-side surface of the second lens is convex, and the image-side surface of the second lens is concave; the object-side surface of the third lens is convex, and the image-side surface of the third lens is convex; the image-side surface of the fourth lens is concave; the object-side surface of the fifth lens is concave, and the image-side surface of the fifth lens is convex; the object-side surface of the sixth lens is convex, and the image-side surface of the sixth lens is concave. Among them, half the diagonal length of the effective pixel area on the imaging surface, ImgH, satisfies the following relationship with the maximum field of view (FOV) of the camera lens: 4.34mm ≥ ImgH*TAN(FOV / 3) > 3.0mm; the effective focal length f of the camera lens satisfies the following relationship with the center thickness CT1 of the first lens: 1.47 ≤ f / CT1 ≤ 3.12; The edge thickness ET1 of the first lens, the sag SAG11 of the object-side surface of the first lens at the maximum effective radius, and the sag SAG12 of the image-side surface of the first lens at the maximum effective radius satisfy the following condition: 3.0 <ET1 / (SAG12-SAG11)≤4.25; The effective focal length f of the camera lens and the effective focal length f6 of the sixth lens satisfy the following condition: -2.24 ≤ f6 / f ≤ -1.85; The effective focal length f of the camera lens and the radius of curvature R1 of the object side surface of the first lens satisfy the following condition: -0.71≤f / R1<-0.

50.

2. The camera lens according to claim 1, characterized in that, The maximum effective radius DT11 of the object side of the first lens and the maximum effective radius DT61 of the object side of the sixth lens satisfy the following condition: 0.85≤DT11 / DT61≤1.

62.

3. The camera lens according to claim 1, characterized in that, The maximum effective radius DT11 of the object side of the first lens, the maximum effective radius DT12 of the image side of the first lens, and the edge thickness ET1 of the first lens satisfy the following condition: 0.79≤(DT11-DT12) / ET1≤1.

23.

4. The camera lens according to claim 1, characterized in that, The center thickness CT1 of the first lens, the center thickness CT3 of the third lens, and the air gap T12 between the first lens and the second lens on the optical axis satisfy the following condition: 1.72≤(CT1+T12) / CT3≤3.

55.

5. The camera lens according to claim 1, characterized in that, The center thickness CT1 of the first lens and the center thickness CT3 of the third lens satisfy the following condition: 0.8 <CT1 / CT3≤1.91。 6. The camera lens according to claim 1, characterized in that, The edge thickness ET4 of the fourth lens and the sag SAG41 of the object side surface of the fourth lens at the maximum effective radius satisfy the following condition: -4.13≤ET4 / SAG41≤-2.

13.

7. The camera lens according to claim 1, characterized in that, The edge thickness ET4 of the fourth lens and the center thickness CT4 of the fourth lens satisfy the following condition: 1.75≤ET4 / CT4<2.

0.

8. The camera lens according to claim 1, characterized in that, The maximum effective radius DT12 of the image side of the first lens, the maximum effective radius DT62 of the image side of the sixth lens, and the maximum effective radius DTs of the aperture stop satisfy the following condition: 1.7 < (DT62 - DT12) / DTs ≤ 2.

77.

9. The camera lens according to claim 1, characterized in that, The effective focal length f of the camera lens and the effective focal length f5 of the fifth lens satisfy the following condition: 1.0 < f5 / f ≤ 1.

37.

10. The camera lens according to claim 1, characterized in that, The effective focal length f of the camera lens, the effective focal length f1 of the first lens, and the effective focal length f4 of the fourth lens satisfy the following condition: -0.93≤f / f1+f / f4≤-0.

79.

11. The camera lens according to claim 1, characterized in that, 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 condition: 3.62≤(f2-f3) / f≤6.

77.

12. The camera lens according to claim 1, characterized in that, The effective focal length f of the camera lens, 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: 1.0 < f / (R5+R6) ≤ 2.

51.

13. The camera lens according to claim 1, characterized in that, The effective focal length f of the camera lens, the radius of curvature R3 of the object side of the second lens, and the radius of curvature R4 of the image side of the second lens satisfy the following condition: 2.16≤f / (R4-R3)≤4.

34.

14. The camera lens according to claim 1, characterized in that, The effective focal length f of the camera lens and the radius of curvature R10 of the image side surface of the fifth lens satisfy the following condition: -2.01≤f / R10≤-1.37.

Images