Camera lens

Abstract

The application provides a camera lens, comprising: a lens barrel; a lens assembly assembled in the lens barrel, the lens assembly sequentially comprises a first lens, a second lens, a third lens, a fourth lens, a fifth lens, a sixth lens and a seventh lens from an object side to an image side; the lens assembly further comprises a plurality of shading elements, the first shading element, the second shading element and the third shading element satisfy: CP1=CP2=CP3; the camera lens satisfies: f1>6mm, 2<fno*(EP01 / CT1)<4; wherein, f1 is the effective focal length of the first lens, CT1 is the center thickness of the first lens, EP01 is the axial distance from the first shading element to the object side end surface of the lens barrel, fno is the F number of the camera lens, CP1 is the maximum thickness of the first shading element, CP2 is the maximum thickness of the second shading element, and CP3 is the maximum thickness of the third shading element. The application solves the problem that the front end lens of the camera lens in the prior art is prone to stray light.

Description

[0001] This invention is a divisional application of the invention patent filed on June 21, 2023, with application number 2023107486946 and invention title "Camera Lens". Technical Field

[0002] This invention relates to the field of optical imaging equipment technology, and more specifically, to a camera lens. Background Technology

[0003] With the advancement of technology, many electronic devices, such as security surveillance cameras, mobile phones, and vehicle imaging systems, require camera lenses to fulfill their photographic and video recording functions. To meet higher video recording demands, there is an urgent need to design camera lenses with higher image quality. Seven-element camera lenses, through the combination of multiple lenses, can mutually correct and compensate for each other's imaging capabilities, improve the ability to converge light, and enhance lens resolution and contrast, thus greatly improving image quality. However, in seven-element camera lenses, the front lens is prone to deflecting light onto the lens barrel, generating stray light and resulting in concentrated stray light at the head of the lens.

[0004] In other words, existing camera lenses suffer from the problem of stray light easily generated by the front lens. Summary of the Invention

[0005] The main objective of this invention is to provide a camera lens to solve the problem of stray light easily generated by the front lens in existing camera lenses.

[0006] To achieve the above object, according to one aspect of the present invention, there is provided a camera lens, comprising: a lens barrel; a lens group assembled within the lens barrel, the lens group sequentially including a first lens, a second lens, a third lens, a fourth lens, a fifth lens, a sixth lens and a seventh lens from the object side to the image side; the lens group further includes a plurality of light-shielding elements, and at least the first light-shielding element to the seventh light-shielding element are included in the plurality of light-shielding elements; the first light-shielding element is located between the first lens and the second lens and is in partial contact with the image side surface of the first lens; the second light-shielding element is located between the second lens and the third lens and is in partial contact with the image side surface of the second lens; the third light-shielding element is located between the third lens and the fourth lens and is in partial contact with the image side surface of the third lens; the fourth light-shielding element is located between the fourth lens and the fifth lens and is in partial contact with the image side surface of the fourth lens; the fifth light-shielding element is located between the fifth lens and the sixth lens and is in partial contact with the image side surface of the fifth lens; the sixth light-shielding element is located between the sixth lens and the seventh lens and is in partial contact with the image side surface of the sixth lens; the seventh light-shielding element is located on the image side of the seventh lens and is in partial contact with the image side surface of the seventh lens; wherein, the following is satisfied among the first light-shielding element, the second light-shielding element and the third light-shielding element: CP1 = CP2 = CP3; the camera lens satisfies: f1 > 6 mm, 2 < fno * (EP01 / CT1) < 4; where f1 is the effective focal length of the first lens, CT1 is the central thickness of the first lens, EP01 is the axial distance from the first light-shielding element to the object-side end surface of the lens barrel, fno is the F-number of the camera lens, CP1 is the maximum thickness of the first light-shielding element, CP2 is the maximum thickness of the second light-shielding element, and CP3 is the maximum thickness of the third light-shielding element.

[0007] According to another aspect of the present invention, a camera lens is provided, comprising: a lens barrel; a lens assembly mounted within the lens barrel, the lens assembly comprising, sequentially from the object side to the image side, a first lens, a second lens, a third lens, a fourth lens, a fifth lens, a sixth lens, and a seventh lens; the lens assembly further comprising a plurality of light-shielding elements, wherein at least the first to seventh light-shielding elements are included; the first light-shielding element is located between the first lens and the second lens and contacts the image-side surface of the first lens; the second light-shielding element is located between the second lens and the third lens and contacts the image-side surface of the second lens; the third light-shielding element is located between the third lens and the fourth lens and contacts the image-side surface of the third lens; the fourth light-shielding element is located between the fourth lens and the fifth lens and contacts the image-side surface of the fourth lens; the fifth light-shielding element is located between the fifth lens and the sixth lens and contacts the image-side surface of the fifth lens; The image-side surface of the fifth lens is in contact; the sixth light-shielding element is located between the sixth and seventh lenses and is in contact with the image-side surface of the sixth lens; the seventh light-shielding element is located on the image side of the seventh lens and is in contact with the image-side surface of the seventh lens; wherein, the first, second, and third light-shielding elements satisfy: CP1=CP2=CP3; the camera lens satisfies: -12<(f1+f2) / (CP1+EP12+CP2+EP23)<-5, where f1 is the effective focal length of the first lens, f2 is the effective focal length of the second lens, CP1 is the maximum thickness of the first light-shielding element, CP2 is the maximum thickness of the second light-shielding element, EP12 is the axial distance from the image-side surface of the first light-shielding element to the object-side surface of the second light-shielding element, and EP23 is the axial distance from the image-side surface of the second light-shielding element to the object-side surface of the third light-shielding element. Because the object-side and image-side surfaces of the first lens easily reflect light onto the inner wall of the lens barrel, producing stray light, and because imperfections in the lens barrel, as well as non-sharp or shiny apertures, cause needle-like, flocculent, and feather-like stray light, the image quality of the camera lens is poor. By controlling the parameters of the first lens, second lens, first light-blocking element, second light-blocking element, and third light-blocking element, it is beneficial to control the refraction angle of light, effectively suppressing the generation of stray light. At the same time, controlling the spacing between the light-blocking elements helps to adjust the aberrations of the camera lens during assembly, improving the accuracy of the camera lens, and also helps the light-blocking elements effectively block stray light, further reducing stray light and improving image quality.

[0008] According to another aspect of the present invention, there is provided a camera lens, comprising: a lens barrel; a lens group assembled in the lens barrel, the lens group sequentially including a first lens, a second lens, a third lens, a fourth lens, a fifth lens, a sixth lens and a seventh lens from the object side to the image side; the lens group further includes a plurality of light-shielding elements, and at least the first light-shielding element to the seventh light-shielding element are included in the plurality of light-shielding elements; the first light-shielding element is located between the first lens and the second lens and is in partial contact with the image side surface of the first lens; the second light-shielding element is located between the second lens and the third lens and is in partial contact with the image side surface of the second lens; the third light-shielding element is located between the third lens and the fourth lens and is in partial contact with the image side surface of the third lens; the fourth light-shielding element is located between the fourth lens and the fifth lens and is in partial contact with the image side surface of the fourth lens; the fifth light-shielding element is located between the fifth lens and the sixth lens and is in partial contact with the image side surface of the fifth lens; the sixth light-shielding element is located between the sixth lens and the seventh lens and is in partial contact with the image side surface of the sixth lens; the seventh light-shielding element is located on the image side of the seventh lens and is in partial contact with the image side surface of the seventh lens; wherein, the following is satisfied among the first light-shielding element, the second light-shielding element and the third light-shielding element: CP1 = CP2 = CP3; the camera lens satisfies: 35 < T23 / CP2 + T34 / CP3 < 45, where CP2 is the maximum thickness of the second light-shielding element, CP3 is the maximum thickness of the third light-shielding element, T23 is the on-axis distance from the image side surface of the second lens to the object side surface of the third lens, and T34 is the on-axis distance from the image side surface of the third lens to the object side surface of the fourth lens. By controlling parameters such as the second lens, the third lens, the fourth lens, and the first light-shielding element, the second light-shielding element and the third light-shielding element, it is beneficial to control the distance between the lenses, and further control the size of the air gap between the lenses, ensure the stability of the gap between the second lens and the third lens and between the third lens and the fourth lens, reduce the sensitivity of the change of the air gap during the assembly process, reduce the influence of the air gap on the performance parameters of the camera lens, and at the same time improve the stable assembly and support between the lenses.

[0009] Further, the camera lens satisfies: -12 < (f1 + f2) / (CP1 + EP12 + CP2 + EP23) < -5, where f1 is the effective focal length of the first lens, f2 is the effective focal length of the second lens, CP1 is the maximum thickness of the first light-shielding element, CP2 is the maximum thickness of the second light-shielding element, EP12 is the on-axis distance from the image side surface of the first light-shielding element to the object side surface of the second light-shielding element, and EP23 is the on-axis distance from the image side surface of the second light-shielding element to the object side surface of the third light-shielding element.

[0010] Further, the camera lens satisfies: 35 < T23 / CP2 + T34 / CP3 < 45, where CP2 is the maximum thickness of the second light-shielding element, CP3 is the maximum thickness of the third light-shielding element, T23 is the on-axis distance from the image side of the second lens to the object side of the third lens, and T34 is the on-axis distance from the image side of the third lens to the object side of the fourth lens.

[0011] Further, the camera lens satisfies: 1 < EP34 / CT4*N4 < 4, where EP34 is the on-axis distance from the image side of the third light-shielding element to the object side of the fourth light-shielding element, CT4 is the central thickness of the fourth lens, and N4 is the refractive index of the fourth lens.

[0012] Further, the camera lens satisfies: 3 < f45 / (EP45 + CP5 + EP56) < 7, where f45 is the combined focal length of the fourth and fifth lenses, EP45 is the on-axis distance from the image side of the fourth light-shielding element to the object side of the fifth light-shielding element, EP56 is the on-axis distance from the image side of the fifth light-shielding element to the object side of the sixth light-shielding element, and CP5 is the maximum thickness of the fifth light-shielding element.

[0013] Further, the camera lens satisfies: 10 < f6 / EP56 - f7 / EP67 < 25, where f6 is the effective focal length of the sixth lens, f7 is the effective focal length of the seventh lens, EP56 is the on-axis distance from the image side of the fifth light-shielding element to the object side of the sixth light-shielding element, and EP67 is the on-axis distance from the image side of the sixth light-shielding element to the object side of the seventh light-shielding element.

[0014] Further, the camera lens satisfies: -20 < f7 / EP67*N7 < -5, where f7 is the effective focal length of the seventh lens, EP67 is the on-axis distance from the image side of the sixth light-shielding element to the object side of the seventh light-shielding element, and N7 is the refractive index of the seventh lens.

[0015] Further, the camera lens satisfies: 5 < f / (CP5 + CP6) < 15, where f is the focal length of the camera lens, CP5 is the maximum thickness of the fifth light-shielding element, and CP6 is the maximum thickness of the sixth light-shielding element.

[0016] Further, the lens group further includes a fourth auxiliary light-shielding element, and the fourth auxiliary light-shielding element is located between the fourth light-shielding element and the fifth lens.

[0017] Further, the lens group further includes a fifth auxiliary light-shielding element, and the fifth auxiliary light-shielding element is located between the fifth light-shielding element and the sixth lens.

[0018] Further, the lens group further includes a sixth auxiliary light-shielding element, and the sixth auxiliary light-shielding element is located between the sixth light-shielding element and the seventh lens.

[0019] According to the technical solution of this invention, a camera lens includes a lens barrel and a lens group assembled within the lens barrel. The lens group, from the object side to the image side, sequentially includes a first lens, a second lens, a third lens, a fourth lens, a fifth lens, a sixth lens, and a seventh lens. The lens group also includes multiple light-shielding elements, of which at least the first to seventh light-shielding elements are included. The first light-shielding element is located between the first and second lenses and contacts the image-side surface of the first lens. The second light-shielding element is located between the second and third lenses and contacts the image-side surface of the second lens. The third light-shielding element is located between the third and fourth lenses and contacts the image-side surface of the third lens. The fourth light-shielding element is located between the fourth and fifth lenses and contacts the image-side surface of the fourth lens. The fifth light-shielding element is located between the fifth and sixth lenses and contacts the image-side surface of the fifth lens. The sixth light-shielding element is located between the sixth and seventh lenses and contacts the image-side surface of the sixth lens. The seventh light-shielding element is located on the image side of the seventh lens and contacts the image-side surface of the seventh lens.

[0020] The first, second, and third light-blocking elements satisfy the following condition: CP1 = CP2 = CP3;

[0021] The camera lens meets the following requirements: f1 > 6mm, 2 <fno*(EP01 / CT1)<4;

[0022] Wherein, f1 is the effective focal length of the first lens, CT1 is the center thickness of the first lens, EP01 is the axial distance from the first light-shielding element to the object-side end face of the lens barrel, fno is the F-number of the camera lens, CP1 is the maximum thickness of the first light-shielding element, CP2 is the maximum thickness of the second light-shielding element, and CP3 is the maximum thickness of the third light-shielding element.

[0023] Because the object-side and image-side surfaces of the first lens easily reflect light onto the inner wall of the lens barrel, producing stray light, and because imperfections in the lens barrel, such as uneven or shiny apertures, cause needle-like, wispy, and feather-like stray light, the image quality of the camera lens is poor. By controlling parameters such as the first lens, the first light-blocking element, the second light-blocking element, the third light-blocking element, and the F-number of the camera lens, the amount of light entering the camera lens can be effectively reduced, significantly reducing stray light generation. Furthermore, the first, second, and third light-blocking elements can also block stray light, effectively reducing its occurrence. Controlling the focal length and center thickness of the first lens helps reduce the angle of light refraction, further reducing the generation of complex stray light. Controlling these parameters helps reduce stray light reflected from the object-side and image-side surfaces of the first lens onto the inner wall of the lens barrel, thus improving the image quality of the camera lens, which tends to have concentrated energy stray light. Attached Figure Description

[0024] The accompanying drawings, which form part of this application, are used to provide a further understanding of the invention. The illustrative embodiments of the invention and their descriptions are used to explain the invention and do not constitute an undue limitation of the invention. In the drawings:

[0025] Figure 1 A simulation diagram of stray light from a camera lens in the prior art is shown;

[0026] Figure 2 A stray light simulation diagram of a camera lens according to an optional embodiment of the present invention is shown;

[0027] Figure 3 A schematic diagram showing some parameters of an optional embodiment of the present invention is shown;

[0028] Figures 4 to 6 A schematic diagram of the camera lens of Example 1 of the present invention is shown in a first state, a second state, and a third state.

[0029] Figures 7 to 10 The on-axis chromatic aberration curve, magnification chromatic aberration curve, astigmatism curve, and distortion curve diagram of Example 1 of the present invention are shown.

[0030] Figures 11 to 13 The following are schematic diagrams showing the structure of the camera lens in Example 2 of the present invention in the first state, the second state, and the third state;

[0031] Figures 14 to 17 The following diagrams illustrate on-axis chromatic aberration curves, magnification chromatic aberration curves, astigmatism curves, and distortion curves of Example 2 of the present invention.

[0032] Figures 18 to 20 The following are schematic diagrams showing the structure of the camera lens in Example 3 of the present invention in the first state, the second state, and the third state;

[0033] Figures 21 to 24 The on-axis chromatic aberration curve, magnification chromatic aberration curve, astigmatism curve, and distortion curve diagram of Example 3 of the present invention are shown.

[0034] Figure 25 A light path diagram of a camera lens according to an optional embodiment of the present invention is shown.

[0035] The above figures include the following reference numerals:

[0036] E1, First lens; P1, First isolator; E2, Second lens; P2, Second isolator; E3, Third lens; P3, Third isolator; E4, Fourth lens; P4, Fourth isolator; P4b, Fourth auxiliary isolator; E5, Fifth lens; P5, Fifth isolator; P5b, Fifth auxiliary isolator; E6, Sixth lens; P6, Sixth isolator; P6b, Sixth auxiliary isolator; E7, Seventh lens; P7, Seventh isolator. Detailed Implementation

[0037] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other. The present invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0038] It should be noted that, unless otherwise specified, all technical and scientific terms used in this application have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains.

[0039] In this invention, unless otherwise stated, directional terms such as "upper," "lower," "top," and "bottom" are generally used in relation to the direction shown in the accompanying drawings, or in relation to the vertical, perpendicular, or gravitational direction of the component itself; similarly, for ease of understanding and description, "inner" and "outer" refer to the inner and outer contours of each component itself, but the above directional terms are not intended to limit this invention.

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

[0041] In the accompanying drawings, the thickness, size, and shape of the lenses have been slightly exaggerated for ease of illustration. Specifically, the shapes of the spherical or aspherical surfaces shown in the drawings are illustrated by way of example. That is, the shapes of the spherical or aspherical surfaces are not limited to those shown in the drawings. The drawings are for illustrative purposes only and are not drawn strictly to scale.

[0042] In this paper, the paraxial region refers to the region near the optical axis. If the lens surface is convex and the location of that convexity is not defined, it means that the lens surface is convex at least in the paraxial region; if the lens surface is concave and the location of that concaveness is not defined, it means that the lens surface is concave at least in the paraxial region. The determination of the surface shape in the paraxial region can be based on the judgment method commonly used by those knowledgeable in the field, using the R value (R refers to the radius of curvature of the paraxial region, usually the R value in the lens data in optical software) to determine convexity or concavity. For the object side, a positive R value indicates a convex surface, and a negative R value indicates a concave surface; for the image side, a positive R value indicates a concave surface, and a negative R value indicates a convex surface.

[0043] In this application, the object side refers to the surface on which the light rays are incident, and the image side refers to the surface on which the light rays are emitted.

[0044] To address the problem of stray light easily generated by the front lens in existing camera lenses, this invention provides a camera lens.

[0045] Example 1

[0046] like Figures 2 to 25 As shown, the camera lens includes a lens barrel and a lens group assembled within the lens barrel. The lens group, from the object side to the image side, includes a first lens, a second lens, a third lens, a fourth lens, a fifth lens, a sixth lens, and a seventh lens. The lens group also includes multiple light-shielding elements, at least including the first to seventh light-shielding elements. The first light-shielding element is located between the first and second lenses and contacts the image-side surface of the first lens. The second light-shielding element is located between the second and third lenses and contacts the image-side surface of the second lens. The third light-shielding element is located between the third and fourth lenses and contacts the image-side surface of the third lens. The fourth light-shielding element is located between the fourth and fifth lenses and contacts the image-side surface of the fourth lens. The fifth light-shielding element is located between the fifth and sixth lenses and contacts the image-side surface of the fifth lens. The sixth light-shielding element is located between the sixth and seventh lenses and contacts the image-side surface of the sixth lens. The seventh light-shielding element is located on the image side of the seventh lens and contacts the image-side surface of the seventh lens.

[0047] The first, second, and third light-blocking elements satisfy the following condition: CP1 = CP2 = CP3;

[0048] The camera lens meets the following requirements: f1 > 6mm, 2 <fno*(EP01 / CT1)<4;

[0049] Wherein, f1 is the effective focal length of the first lens, CT1 is the center thickness of the first lens, EP01 is the axial distance from the first light-shielding element to the object-side end face of the lens barrel, fno is the F-number of the camera lens, CP1 is the maximum thickness of the first light-shielding element, CP2 is the maximum thickness of the second light-shielding element, and CP3 is the maximum thickness of the third light-shielding element.

[0050] Because the object-side and image-side surfaces of the first lens easily reflect light onto the inner wall of the lens barrel, generating stray light, and because imperfections in the lens barrel, such as uneven or shiny apertures, cause needle-like, wispy, and feather-like stray light, the image quality of the camera lens is poor. By controlling parameters such as the first lens, the first light-blocking element, the second light-blocking element, the third light-blocking element, and the F-number of the camera lens, the amount of light entering the camera lens can be effectively reduced, significantly reducing stray light generation. Simultaneously, the first, second, and third light-blocking elements can also block stray light, effectively reducing its occurrence. Controlling the focal length and center thickness of the first lens helps reduce the refraction angle of light, further reducing the generation of complex stray light. Controlling these parameters helps reduce stray light reflected from the object-side and image-side surfaces of the first lens onto the inner wall of the lens barrel, thus improving the concentrated energy stray light appearing at the head of the camera lens. Figure 1 and Figure 2 The comparison shows that the camera lens in the prior art has more stray light, while the camera lens in this application has significantly less stray light.

[0051] Preferably, 2.4 <fno*(EP01 / CT1)<3.5。

[0052] In this embodiment, the camera lens satisfies: -12 < (f1 + f2) / (CP1 + EP12 + CP2 + EP23) < -5, where f1 is the effective focal length of the first lens, f2 is the effective focal length of the second lens, CP1 is the maximum thickness of the first light-shielding element, CP2 is the maximum thickness of the second light-shielding element, EP12 is the axial distance from the image side of the first light-shielding element to the object side of the second light-shielding element, and EP23 is the axial distance from the image side of the second light-shielding element to the object side of the third light-shielding element. By controlling (f1 + f2) / (CP1 + EP12 + CP2 + EP23) within a reasonable range, it is beneficial to adjust the aberrations of the camera lens during assembly and improve the accuracy of the camera lens. Limiting the effective focal lengths of the first and second lenses helps control the refraction angle of light, effectively suppressing stray light generation. Simultaneously, controlling the distance between adjacent light-shielding elements allows the light-shielding elements to effectively block stray light, further reducing stray light and improving image quality. Preferably, -11.5 < (f1 + f2) / (CP1 + EP12 + CP2 + EP23) < -5.5.

[0053] In this embodiment, the camera lens satisfies: 35 < T23 / CP2 + T34 / CP3 < 45, where CP2 is the maximum thickness of the second light-shielding element, CP3 is the maximum thickness of the third light-shielding element, T23 is the on-axis distance from the image side of the second lens to the object side of the third lens, and T34 is the on-axis distance from the image side of the third lens to the object side of the fourth lens. Controlling T23 / CP2 + T34 / CP3 within a reasonable range can ensure more stable assembly and abutment between the lenses, control the distance between the lenses, and thus control the size of the air gap between the lenses, reducing the impact of the air gap on the performance parameters of the camera lens. Preferably, 36 < T23 / CP2 + T34 / CP3 < 44.

[0054] In this embodiment, the camera lens satisfies: 1 < EP34 / CT4*N4 < 4, where EP34 is the on-axis distance from the image side of the third light-shielding element to the object side of the fourth light-shielding element, CT4 is the central thickness of the fourth lens, and N4 is the refractive index of the fourth lens. Controlling EP34 / CT4*N4 within a reasonable range can, on the one hand, effectively improve the step difference between the lenses and enhance the stability of assembly. On the other hand, it can ensure the shape of the fourth lens, improve the stability of lens forming, reduce the difficulty and manufacturing cost of processing, improve the air gap between the fourth lens and the front and rear lenses, and reduce the impact of the air gap on the performance parameters of the camera lens. Preferably, 1.1 < EP34 / CT4*N4 < 3.7.

[0055] In this embodiment, the camera lens satisfies: 3 < f45 / (EP45 + CP5 + EP56) < 7, where f45 is the combined focal length of the fourth and fifth lenses, EP45 is the on-axis distance from the image side of the fourth light-shielding element to the object side of the fifth light-shielding element, EP56 is the on-axis distance from the image side of the fifth light-shielding element to the object side of the sixth light-shielding element, and CP5 is the maximum thickness of the fifth light-shielding element. Controlling f45 / (EP45 + CP5 + EP56) within a reasonable range can effectively block the stray light generated by the mechanical parts of the lens and effectively improve the aberration generated at the fifth and sixth lenses, improving the imaging quality of the camera lens. Preferably, 3.3 < f45 / (EP45 + CP5 + EP56) < 7.

[0056] In this embodiment, the camera lens satisfies: 10 < f6 / EP56 - f7 / EP67 < 25, where f6 is the effective focal length of the sixth lens, f7 is the effective focal length of the seventh lens, EP56 is the axial distance from the image side of the fifth light-shielding element to the object side of the sixth light-shielding element, and EP67 is the axial distance from the image side of the sixth light-shielding element to the object side of the seventh light-shielding element. Controlling f6 / EP56 - f7 / EP67 within a reasonable range can improve the refractive index of the lens, facilitate lens molding, reduce the molding difficulty and cost, while improving the assembly step difference between the sixth lens and the seventh lens, increasing the standing stability of the camera lens, enhancing the assembly yield, and also controlling the light path and reducing the generation of stray light. Preferably, 12 < f6 / EP56 - f7 / EP67 < 24.

[0057] In this embodiment, the camera lens satisfies: -20 < f7 / EP67 * N7 < -5, where f7 is the effective focal length of the seventh lens, EP67 is the axial distance from the image side of the sixth light-shielding element to the object side of the seventh light-shielding element, and N7 is the refractive index of the seventh lens. Controlling f7 / EP67 * N7 within a reasonable range is beneficial to improving the surface curvature of the seventh lens, reducing imaging distortion, while facilitating the processing and molding of the seventh lens, enhancing the yield and reducing the cost, and also improving the assembly step difference between the sixth lens and the seventh lens, enhancing the assembly stability, increasing the assembly yield, and reducing the generation of stray light. Preferably, -18 < f7 / EP67 * N7 < -5.5.

[0058] In this embodiment, the camera lens satisfies: 5 < f / (CP5 + CP6) < 15, where f is the focal length of the camera lens, CP5 is the maximum thickness of the fifth light-shielding element, and CP6 is the maximum thickness of the sixth light-shielding element. Controlling f / (CP5 + CP6) within a reasonable range can further improve the assembly stability and increase the ways to adjust the aberration of the camera lens, thereby further improving the imaging quality of the camera lens while meeting the requirements of the application scenario. Preferably, 5.4 < f / (CP5 + CP6) < 13.

[0059] In this embodiment, the lens group further includes a fourth auxiliary light-shielding element, which is located between the fourth light-shielding element and the fifth lens. The provision of the fourth auxiliary light-shielding element is beneficial to enhancing the assembly stability between the fourth lens and the fifth lens, transmitting the assembly stress, improving the internal reflection stray light generated in the optical structure region of the fourth lens, and improving the imaging quality of the camera lens.

[0060] In this embodiment, the lens group further includes a fifth auxiliary light-shielding element, which is located between the fifth light-shielding element and the sixth lens. The provision of the fifth auxiliary light-shielding element helps to enhance the assembly stability between the fifth and sixth lenses, transmit assembly stress, improve the internal reflection stray light generated in the optical structure area of ​​the fifth lens, and improve the imaging quality of the camera lens.

[0061] In this embodiment, the lens group further includes a sixth auxiliary light-shielding element, which is located between the sixth light-shielding element and the seventh lens. The arrangement of the sixth auxiliary light-shielding element helps to enhance the assembly stability between the sixth and seventh lenses, transmit assembly stress, improve the internal reflection stray light generated in the optical structure area of ​​the sixth lens, and improve the imaging quality of the camera lens.

[0062] Example 2

[0063] like Figures 2 to 25 As shown, the camera lens includes a lens barrel and a lens group assembled within the lens barrel. The lens group, from the object side to the image side, includes a first lens, a second lens, a third lens, a fourth lens, a fifth lens, a sixth lens, and a seventh lens. The lens group also includes multiple light-shielding elements, at least including the first to seventh light-shielding elements. The first light-shielding element is located between the first and second lenses and contacts the image-side surface of the first lens. The second light-shielding element is located between the second and third lenses and contacts the image-side surface of the second lens. The third light-shielding element is located between the third and fourth lenses and contacts the image-side surface of the third lens. The fourth light-shielding element is located between the fourth and fifth lenses and contacts the image-side surface of the fourth lens. The fifth light-shielding element is located between the fifth and sixth lenses and contacts the image-side surface of the fifth lens. The sixth light-shielding element is located between the sixth and seventh lenses and contacts the image-side surface of the sixth lens. The seventh light-shielding element is located on the image side of the seventh lens and contacts the image-side surface of the seventh lens.

[0064] The first, second, and third light-blocking elements satisfy the following condition: CP1 = CP2 = CP3;

[0065] The camera lens satisfies: -12 < (f1 + f2) / (CP1 + EP12 + CP2 + EP23) < -5;

[0066] Where f1 is the effective focal length of the first lens, f2 is the effective focal length of the second lens, CP1 is the maximum thickness of the first light-shielding element, CP2 is the maximum thickness of the second light-shielding element, EP12 is the on-axis distance from the image side of the first light-shielding element to the object side of the second light-shielding element, EP23 is the on-axis distance from the image side of the second light-shielding element to the object side of the third light-shielding element, and CP3 is the maximum thickness of the third light-shielding element.

[0067] Because the object-side and image-side surfaces of the first lens easily reflect light onto the inner wall of the lens barrel, generating stray light, and because imperfections in the lens barrel, such as uneven or shiny apertures, cause needle-like, flocculent, and feather-like stray light, the image quality of the camera lens is poor. Controlling the parameters of the first lens, second lens, first light-blocking element, second light-blocking element, and third light-blocking element helps control the refraction angle of light, effectively suppressing stray light generation. Controlling the spacing between the light-blocking elements also helps adjust the aberrations of the camera lens during assembly, improving the lens's precision. Furthermore, the light-blocking elements effectively block stray light, further reducing stray light and improving image quality. Figure 1 and Figure 2 The comparison shows that the camera lens in the prior art has more stray light, while the camera lens in this application has significantly less stray light.

[0068] It should be noted that the camera lens in Embodiment 2 also satisfies the other relationships in Embodiment 1, which will not be described in detail here.

[0069] Example 3

[0070] like Figures 2 to 24 As shown, the camera lens includes a lens barrel and a lens group assembled within the lens barrel. The lens group, from the object side to the image side, includes a first lens, a second lens, a third lens, a fourth lens, a fifth lens, a sixth lens, and a seventh lens. The lens group also includes multiple light-shielding elements, at least including the first to seventh light-shielding elements. The first light-shielding element is located between the first and second lenses and contacts the image-side surface of the first lens. The second light-shielding element is located between the second and third lenses and contacts the image-side surface of the second lens. The third light-shielding element is located between the third and fourth lenses and contacts the image-side surface of the third lens. The fourth light-shielding element is located between the fourth and fifth lenses and contacts the image-side surface of the fourth lens. The fifth light-shielding element is located between the fifth and sixth lenses and contacts the image-side surface of the fifth lens. The sixth light-shielding element is located between the sixth and seventh lenses and contacts the image-side surface of the sixth lens. The seventh light-shielding element is located on the image side of the seventh lens and contacts the image-side surface of the seventh lens.

[0071] The first, second, and third light-blocking elements satisfy the following condition: CP1 = CP2 = CP3;

[0072] The camera lens meets the following requirements: 35 <T23 / CP2+T34 / CP3<45;

[0073] Wherein, CP2 is the maximum thickness of the second light-shielding element, CP3 is the maximum thickness of the third light-shielding element, T23 is the on-axis distance from the image side of the second lens to the object side of the third lens, and T34 is the on-axis distance from the image side of the third lens to the object side of the fourth lens.

[0074] By controlling the parameters of the second, third, and fourth lenses, as well as the first, second, and third light-blocking elements, it is beneficial to control the distance between the lenses, thereby controlling the size of the air gap between the lenses. This ensures the stability of the gaps between the second and third lenses, and between the third and fourth lenses, reduces the sensitivity to changes in air gaps during assembly, lowers the impact of air gaps on the performance parameters of the camera lens, and improves the stability of the lens assembly.

[0075] It should be noted that the camera lens in Embodiment 3 also satisfies the other relationships in Embodiment 1, which will not be described in detail here.

[0076] Optionally, the aforementioned camera lens may also include a filter for correcting color deviation and / or a protective glass for protecting the photosensitive element located on the imaging surface.

[0077] The camera lens in this application can employ multiple lenses, such as the seven lenses mentioned above. By rationally allocating the optical power, surface shape, center thickness of each lens, and on-axis distance between each lens, the imaging quality of the camera lens can be effectively increased, the sensitivity of the camera lens can be reduced, and the manufacturability of the camera lens can be improved, making the camera lens more conducive to production and processing and suitable for portable electronic devices such as smartphones.

[0078] In this application, at least one of the mirror surfaces of each lens is an aspherical mirror surface. An aspherical lens is characterized by a continuously changing curvature from its center to its periphery. Unlike a spherical lens, which has a constant curvature from its center to its periphery, an aspherical lens has superior curvature radius characteristics, offering advantages in improving distortion and astigmatism. By using aspherical lenses, aberrations occurring during image formation can be eliminated as much as possible, thereby improving image quality.

[0079] However, those skilled in the art will understand that the number of lenses constituting the camera lens can be changed to obtain the various results and advantages described in this specification without departing from the technical solutions claimed in this application. For example, although seven lenses are described as an example in the embodiments, the camera lens is not limited to including seven lenses. If necessary, the camera lens may also include other numbers of lenses.

[0080] exist Figure 4In the diagram, S1 is the object-side surface of the first lens, S2 is the image-side surface of the first lens, S3 is the object-side surface of the second lens, S4 is the image-side surface of the second lens, S5 is the object-side surface of the third lens, S6 is the image-side surface of the third lens, S7 is the object-side surface of the fourth lens, S8 is the image-side surface of the fourth lens, S9 is the object-side surface of the fifth lens, S10 is the image-side surface of the fifth lens, S11 is the object-side surface of the sixth lens, S12 is the image-side surface of the sixth lens, S13 is the object-side surface of the seventh lens, and S14 is the image-side surface of the seventh lens.

[0081] The following description, with reference to the accompanying drawings, further illustrates examples of specific surface shapes and parameters of camera lenses applicable to the above embodiments.

[0082] It should be noted that any of the examples one through three below are applicable to all embodiments of this application.

[0083] Example 1

[0084] like Figures 4 to 10 As shown, the camera lens of Example 1 of this application is described. Figure 4 The diagram shows a schematic of the camera lens in Example 1 in its first state. Figure 5 The diagram shows a schematic of the camera lens in Example 1 in its second state. Figure 6 The diagram shows the structure of the camera lens in the third state of Example 1.

[0085] like Figure 4 As shown, the camera lens, from the object side to the image side, includes, in sequence: first lens E1, first isolator P1, second lens E2, second isolator P2, third lens E3, third isolator P3, fourth lens E4, fourth isolator P4, fourth auxiliary isolator P4b, fifth lens E5, fifth isolator P5, sixth lens E6, sixth isolator P6, sixth auxiliary isolator P6b, seventh lens E7, and seventh isolator P7.

[0086] exist Figure 5 The second state shown is the same as Figure 4 The first state shown is similar, except that the size of the spacer is slightly different.

[0087] exist Figure 6 The third state shown is the same as Figure 4 Compared to the first state shown, Figure 6 There is no fourth auxiliary spacer P4b; the dimensions of the other spacers are slightly different.

[0088] Table 1 shows the basic structural parameters of the camera lens in Example 1, where the units for radius of curvature and thickness / distance are millimeters (mm).

[0089]

[0090]

[0091] Table 1

[0092] In Example 1, the object-side and image-side surfaces of some of the lenses from the first lens E1 to the seventh lens E7 are aspherical. The surface shape of each aspherical lens can be defined using, but is not limited to, the following aspherical formula:

[0093]

[0094] Where x is the distance vector from the vertex of the aspherical surface at a height h along the optical axis; c is the paraxial curvature of the aspherical surface, c = 1 / R, that is, the paraxial curvature c is the reciprocal of the radius of curvature R in Table 1 above; k is the conic coefficient; Ai is the i-th order correction coefficient of the aspherical surface. Table 2 below gives the conic coefficients and higher-order coefficients A4, A6, A8, A10, A12, A14, A16, A18, A20, A22, A24, A26, A28, A30 that can be used for each aspherical mirror S1-S14 in Example 1.

[0095]

[0096]

[0097] Table 2

[0098] Figure 7 The on-axis chromatic aberration curve of the camera lens in Example 1 is shown, which indicates the deflection of the focal point of light of different wavelengths after passing through the camera lens. Figure 8 The magnification chromatic aberration curve of the camera lens in Example 1 is shown, which represents the deviation of light at different image heights on the imaging plane after passing through the camera lens. Figure 9 The astigmatism curve of the camera lens in Example 1 is shown, which represents the curvature of the meridional image plane and the curvature of the sagittal image plane. Figure 10 The distortion curve of the camera lens in Example 1 is shown, which represents the distortion magnitude corresponding to different field of view angles.

[0099] according to Figures 7 to 10 As can be seen, the camera lens given in Example 1 can achieve good image quality.

[0100] Example 2

[0101] like Figures 11 to 17 As shown, the camera lens of Example 2 of this application is described. Figure 11 The diagram shows the structure of the camera lens in Example 2 in its first state. Figure 12 The diagram shows the structure of the camera lens in Example 2 in the second state. Figure 13A schematic diagram of the camera lens in Example 2 in the third state is shown.

[0102] like Figure 11 As shown, the camera lens, from the object side to the image side, includes, in sequence: a first lens E1, a first isolator P1, a second lens E2, a second isolator P2, a third lens E3, a third isolator P3, a fourth lens E4, a fourth isolator P4, a fifth lens E5, a fifth isolator P5, a fifth auxiliary isolator P5b, a sixth lens E6, a sixth isolator P6, a sixth auxiliary isolator P6b, a seventh lens E7, and a seventh isolator P7.

[0103] exist Figure 12 The second state shown is the same as Figure 11 The first state shown is similar, except that the size of the spacer is slightly different.

[0104] exist Figure 13 The third state shown is the same as Figure 11 The first state shown is similar, except that the size of the spacer is slightly different.

[0105] Table 3 shows the basic structural parameters of the camera lens in Example 2, where the units for radius of curvature and thickness / distance are millimeters (mm).

[0106]

[0107]

[0108] Table 3

[0109] Table 4 provides the conic coefficients and higher-order coefficients for each aspherical mirror S1-S14 in Example 2.

[0110] Face number A4 A6 A8 A10 A12 A14 A16 S1 -5.8381E-04 9.7851E-03 -4.8413E-02 1.5042E-01 -3.1488E-01 4.5962E-01 -4.7882E-01 S2 -2.5164E-03 -1.0430E-02 7.0822E-02 -2.3344E-01 4.9771E-01 -7.3188E-01 7.6581E-01 S3 -1.2559E-02 1.6813E-02 -5.3323E-02 1.5820E-01 -3.1556E-01 4.3456E-01 -4.2286E-01 S4 -7.2458E-03 -4.2872E-03 5.5757E-02 -2.1558E-01 5.3306E-01 -8.9962E-01 1.0728E+00 S5 5.1550E-04 2.9283E-03 -1.7898E-02 5.0833E-02 -7.9409E-02 4.6617E-02 5.9551E-02 S6 -3.3826E-04 -3.0341E-02 1.6709E-01 -5.9047E-01 1.3925E+00 -2.2963E+00 2.7161E+00 S7 -2.7781E-02 -1.1494E-03 -7.9220E-03 -1.9748E-03 8.8832E-02 -2.8862E-01 5.0158E-01 S8 -2.2287E-02 -4.3191E-03 2.0248E-02 -4.5469E-02 6.4671E-02 -6.3957E-02 4.5539E-02 S9 -2.0217E-02 8.4774E-03 2.2757E-03 -1.0108E-02 1.1368E-02 -7.8614E-03 3.7410E-03 S10 -4.5147E-02 1.1859E-02 3.9675E-03 -1.0251E-02 8.9869E-03 -4.8321E-03 1.7588E-03 S11 -2.4328E-02 7.0264E-03 -2.9509E-03 8.2104E-04 -1.8010E-04 3.4418E-05 -5.3805E-06 S12 2.7693E-03 1.1984E-03 -1.3972E-03 3.1804E-04 -2.8743E-05 -1.7130E-06 1.0911E-06 S13 -8.4305E-02 1.0000E-02 3.6740E-03 -2.3584E-03 6.3239E-04 -1.0236E-04 1.1015E-05 S14 -9.3661E-02 2.4948E-02 -5.8913E-03 1.3242E-03 -2.6980E-04 4.3228E-05 -5.0492E-06 Face number A18 A20 A22 A24 A26 A28 A30 S1 3.6039E-01 -1.9630E-01 7.6602E-02 -2.0863E-02 3.7637E-03 -4.0394E-04 1.9515E-05 S2 -5.7901E-01 3.1733E-01 -1.2488E-01 3.4396E-02 -6.2949E-03 6.8762E-04 -3.3927E-05 S3 2.9464E-01 -1.4734E-01 5.2346E-02 -1.2867E-02 2.0737E-03 -1.9623E-04 8.2078E-06 S4 -9.1973E-01 5.6928E-01 -2.5230E-01 7.8126E-02 -1.6064E-02 1.9721E-03 -1.0947E-04 S5 -1.5774E-01 1.6766E-01 -1.0660E-01 4.3212E-02 -1.0977E-02 1.5971E-03 -1.0170E-04 S6 -2.3333E+00 1.4574E+00 -6.5473E-01 2.0596E-01 -4.3036E-02 5.3626E-03 -3.0146E-04 S7 -5.5813E-01 4.2121E-01 -2.1894E-01 7.7429E-02 -1.7830E-02 2.4143E-03 -1.4601E-04 S8 -2.3626E-02 8.9322E-03 -2.4322E-03 4.6403E-04 -5.8785E-05 4.4347E-06 -1.5052E-07 S9 -1.2595E-03 3.0162E-04 -5.0976E-05 5.9369E-06 -4.5303E-07 2.0368E-08 -4.0862E-10 S10 -4.4787E-04 8.0635E-05 -1.0216E-05 8.9056E-07 -5.0804E-08 1.7051E-09 -2.5474E-11 S11 6.1659E-07 -4.7612E-08 2.2671E-09 -5.3402E-11 -1.4244E-13 3.6492E-14 -5.7476E-16 S12 -2.1544E-07 2.6360E-08 -2.1257E-09 1.1234E-10 -3.7397E-12 7.1137E-14 -5.8989E-16 S13 -8.2210E-07 4.3287E-08 -1.6053E-09 4.1052E-11 -6.8878E-13 6.8158E-15 -3.0076E-17 S14 4.2163E-07 -2.5056E-08 1.0499E-09 -3.0302E-11 5.7301E-13 -6.3896E-15 3.1842E-17

[0111] Table 4

[0112] Figure 14 The on-axis chromatic aberration curve of the camera lens in Example 2 is shown, which indicates the deflection of the focal point of light of different wavelengths after passing through the camera lens. Figure 15 The magnification chromatic aberration curve of the camera lens in Example 2 is shown, which represents the deviation of light at different image heights on the imaging plane after passing through the camera lens. Figure 16 The astigmatism curve of the camera lens in Example 2 is shown, which represents the curvature of the meridional image plane and the curvature of the sagittal image plane. Figure 17 The distortion curve of the camera lens in Example 2 is shown, which represents the distortion magnitude corresponding to different field of view angles.

[0113] according to Figures 14 to 17 As can be seen, the camera lens given in Example 2 can achieve good image quality.

[0114] Example 3

[0115] like Figures 18 to 24 As shown, the camera lens of Example 3 of this application is described. Figure 18 A schematic diagram of the camera lens in Example 3 in its first state is shown. Figure 19 The diagram shows the structure of the camera lens in Example 3 in the second state. Figure 20 A schematic diagram of the camera lens in Example 3 in its third state is shown.

[0116] like Figure 18 As shown, the camera lens, from the object side to the image side, includes, in sequence: first lens E1, first isolator P1, second lens E2, second isolator P2, third lens E3, third isolator P3, fourth lens E4, fourth isolator P4, fourth auxiliary isolator P4b, fifth lens E5, fifth isolator P5, sixth lens E6, sixth isolator P6, sixth auxiliary isolator P6b, seventh lens E7, and seventh isolator P7.

[0117] exist Figure 19 The second state shown is the same as Figure 18 The first state shown is similar, except that the size of the spacer is slightly different.

[0118] exist Figure 20 The third state shown is the same as Figure 18 The first state shown is similar, except that the size of the spacer is slightly different.

[0119] Table 5 shows the basic structural parameters of the camera lens in Example 3, where the units for radius of curvature and thickness / distance are millimeters (mm).

[0120]

[0121]

[0122] Table 5

[0123] Table 6 provides the conic coefficients and higher-order coefficients for each aspherical mirror S1-S14 in Example 3.

[0124] Face number A4 A6 A8 A10 A12 A14 A16 S1 8.6382E-04 -3.8092E-03 2.2336E-02 -7.9040E-02 1.8179E-01 -2.8514E-01 3.1420E-01 S2 -2.3457E-03 4.6705E-03 -1.7350E-02 6.0229E-02 -1.4354E-01 2.3416E-01 -2.6767E-01 S3 -1.4062E-02 5.5617E-03 -9.5339E-03 2.0402E-02 -1.5300E-02 -4.2002E-02 1.4130E-01 S4 -1.3537E-02 1.6169E-02 -9.4224E-02 4.1169E-01 -1.1911E+00 2.3810E+00 -3.3770E+00 S5 -3.1771E-03 1.5309E-02 -8.8091E-02 3.7111E-01 -1.0006E+00 1.8312E+00 -2.3311E+00 S6 -5.7366E-03 1.2091E-02 -4.6957E-02 1.3805E-01 -2.5297E-01 2.9497E-01 -1.9705E-01 S7 -3.4751E-02 2.6985E-02 -1.2972E-01 4.0421E-01 -9.2872E-01 1.5457E+00 -1.8670E+00 S8 -4.2892E-02 2.2096E-02 -2.3989E-02 -6.3949E-03 7.0427E-02 -1.3847E-01 1.6250E-01 S9 -7.5300E-02 4.3746E-02 -2.1817E-02 5.4511E-03 1.6876E-03 -2.5842E-03 1.4405E-03 S10 -9.2279E-02 4.2490E-02 -1.7475E-02 5.3085E-03 -1.0939E-03 4.3003E-04 -3.8035E-04 S11 -2.2545E-02 -3.0999E-04 2.4315E-03 -2.0612E-03 1.0412E-03 -3.4847E-04 8.1030E-05 S12 2.4885E-02 -9.1088E-03 3.0875E-03 -1.1507E-03 3.0533E-04 -4.3789E-05 6.0681E-07 S13 2.9099E-03 -2.3240E-02 2.0012E-02 -9.5797E-03 2.9717E-03 -6.3116E-04 9.4392E-05 S14 -1.0857E-02 -1.4898E-02 1.0327E-02 -3.6118E-03 8.0142E-04 -1.2166E-04 1.3103E-05 Face number A18 A20 A22 A24 A26 A28 A30 S1 -2.4716E-01 1.3941E-01 -5.5915E-02 1.5562E-02 -2.8561E-03 3.1078E-04 -1.5183E-05 S2 2.1763E-01 -1.2632E-01 5.1870E-02 -1.4692E-02 2.7246E-03 -2.9707E-04 1.4396E-05 S3 -2.0746E-01 1.8640E-01 -1.1010E-01 4.3065E-02 -1.0768E-02 1.5613E-03 -9.9961E-05 S4 3.4435E+00 -2.5293E+00 1.3248E+00 -4.8222E-01 1.1580E-01 -1.6482E-02 1.0527E-03 S5 2.0885E+00 -1.3149E+00 5.7211E-01 -1.6558E-01 2.9521E-02 -2.7487E-03 8.3025E-05 S6 3.1815E-02 7.0797E-02 -7.4875E-02 3.7903E-02 -1.1101E-02 1.8046E-03 -1.2668E-04 S7 1.6403E+00 -1.0448E+00 4.7645E-01 -1.5138E-01 3.1789E-02 -3.9631E-03 2.2205E-04 S8 -1.2918E-01 7.1974E-02 -2.8184E-02 7.6055E-03 -1.3473E-03 1.4109E-04 -6.6197E-06 S9 -5.1118E-04 1.3075E-04 -2.5542E-05 3.8019E-06 -4.0143E-07 2.6071E-08 -7.6721E-10 S10 2.1855E-04 -7.4985E-05 1.6203E-05 -2.2421E-06 1.9357E-07 -9.5251E-09 2.0448E-10 S11 -1.3373E-05 1.5754E-06 -1.3146E-07 7.5852E-09 -2.8768E-10 6.4506E-12 -6.4778E-14 S12 1.0018E-06 -2.0493E-07 2.1672E-08 -1.4007E-09 5.5711E-11 -1.2577E-12 1.2372E-14 S13 -1.0069E-05 7.6648E-07 -4.1119E-08 1.5084E-09 -3.5682E-11 4.8343E-13 -2.7805E-15 S14 -1.0187E-06 5.7414E-08 -2.3247E-09 6.5941E-11 -1.2443E-12 1.4036E-14 -7.1627E-17

[0125] Table 6

[0126] Figure 20 The on-axis chromatic aberration curve of the camera lens in Example 3 is shown, which indicates the deflection of the focal point of light of different wavelengths after passing through the camera lens. Figure 21 The magnification chromatic aberration curve of the camera lens in Example 3 is shown, which represents the deviation of light at different image heights on the imaging plane after passing through the camera lens. Figure 22The astigmatism curve of the camera lens in Example 3 is shown, which represents the curvature of the meridional image plane and the curvature of the sagittal image plane. Figure 23 The distortion curve of the camera lens in Example 3 is shown, which represents the distortion magnitude corresponding to different field of view angles.

[0127] according to Figures 20 to 23 As can be seen, the camera lens given in Example 3 can achieve good image quality.

[0128] In summary, Examples 1 to 3 satisfy the relationships shown in Table 7.

[0129]

[0130] Table 7

[0131] Table 8 provides some parameters of the camera lenses for Examples 1 to 3.

[0132] Parameters / Examples 1-1 1-2 1-3 2-1 2-2 2-3 3-1 3-2 3-3 d6s 8.89 9.26 9.26 9.1 9.3 9.39 8.09 8.09 8.09 D6s 9.69 10.13 10.18 10.46 11.05 11.02 11.31 11.31 11.31 EP01 1.04 1.04 1.04 1.14 1.14 1.19 1.06 1.06 1.06 CP1 0.02 0.02 0.02 0.02 0.02 0.02 0.02 0.02 0.02 EP12 0.52 0.52 0.52 0.58 0.58 0.53 0.55 0.55 0.55 CP2 0.02 0.02 0.02 0.02 0.02 0.02 0.02 0.02 0.02 EP23 0.62 0.63 0.63 0.27 0.27 0.27 0.36 0.36 0.36 CP3 0.02 0.02 0.02 0.02 0.02 0.02 0.02 0.02 0.02 EP34 0.48 0.56 0.74 0.72 0.72 0.72 0.4 0.4 0.4 EP45 0.48 0.49 0.63 0.7 0.7 0.7 0.48 0.68 0.56 CP5 0.02 0.02 0.02 0.65 0.57 0.46 0.68 0.56 0.68 EP56 0.58 0.57 0.57 0.54 0.62 0.65 0.67 0.67 0.67 CP6 0.51 0.52 0.52 0.49 0.49 0.58 0.03 0.03 0.03 EP67 0.42 0.41 0.46 0.91 0.86 0.91 1.14 1.13 1.09

[0133] Table 8

[0134] It should be noted that in Tables 7 and 8, 1-1 represents the first state of the camera lens in Example 1, 1-2 represents the second state of the camera lens in Example 1, and 1-3 represents the third state of the camera lens in Example 1. Similarly, 2-1 represents the first state of the camera lens in Example 2, 2-2 represents the second state of the camera lens in Example 2, 2-3 represents the third state of the camera lens in Example 2, 3-1 represents the first state of the camera lens in Example 3, 3-2 represents the second state of the camera lens in Example 3, and 3-3 represents the third state of the camera lens in Example 3.

[0135] Table 9 shows the effective focal lengths of the first lens, second optical element, and third lens of the camera lenses in Examples 1 to 3.

[0136]

[0137]

[0138] Table 9

[0139] This application also provides an imaging device, whose electronic photosensitive element can be a photocoupled device (CCD) or a complementary metal oxide semiconductor device (CMOS). The imaging device can be a stand-alone imaging device such as a digital camera, or an imaging module integrated into a mobile electronic device such as a mobile phone. The imaging device is equipped with the camera lens described above.

[0140] Obviously, the embodiments described above are merely some, not all, embodiments of the present invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort should fall within the scope of protection of the present invention.

[0141] It should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the exemplary embodiments according to this application. As used herein, the singular form is intended to include the plural form as well, unless the context clearly indicates otherwise. Furthermore, it should be understood that when the terms "comprising" and / or "including" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof.

[0142] It should be noted that the terms "first," "second," etc., used in the specification, claims, and accompanying drawings of this application are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate so that the embodiments of this application described herein can be implemented in sequences other than those illustrated or described herein.

[0143] The above description is merely a preferred embodiment of the present invention and is not intended to limit the invention. Various modifications and variations can be made to the present invention by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. A camera lens, characterized in that, include: Lens tube; A lens assembly is fitted inside the lens barrel. The lens assembly consists of seven lenses with optical power. From the object side to the image side, the lens assembly includes a first lens, a second lens, a third lens, a fourth lens, a fifth lens, a sixth lens, and a seventh lens. The first lens has positive optical power, the second lens has negative optical power, the third lens has positive optical power, the fourth lens has negative optical power, the sixth lens has positive optical power, and the seventh lens has negative optical power. The object side of the first lens is convex, and the image side of the first lens is concave. The object side of the second lens is convex, and the image side of the second lens is concave. The object side of the third lens is convex, and the image side of the third lens is concave. The object side of the fifth lens is convex, and the image side of the fifth lens is concave. The object side of the sixth lens is convex, and the image side of the seventh lens is concave. The lens group also includes a plurality of light-shielding elements, of which at least a first light-shielding element to a seventh light-shielding element are included; The first light-shielding element is located between the first lens and the second lens, and is in contact with the image-side portion of the first lens; The second light-shielding element is located between the second lens and the third lens, and is in contact with the image-side surface of the second lens; The third light-shielding element is located between the third lens and the fourth lens, and is in contact with the image-side surface of the third lens; The fourth light-shielding element is located between the fourth lens and the fifth lens, and is in contact with the image-side surface of the fourth lens; The fifth light-shielding element is located between the fifth lens and the sixth lens, and is in contact with the image-side surface of the fifth lens; The sixth light-shielding element is located between the sixth lens and the seventh lens, and is in contact with the image-side surface of the sixth lens; The seventh light-shielding element is located on the image side of the seventh lens and is in contact with the image side surface of the seventh lens. Wherein, the first light-shielding element, the second light-shielding element and the third light-shielding element satisfy the following relationship: CP1=CP2=CP3; The camera lens satisfies: -11.05≤(f1+f2) / (CP1+EP12+CP2+EP23) ≤-6.04; Wherein, f1 is the effective focal length of the first lens, f2 is the effective focal length of the second lens, CP1 is the maximum thickness of the first light-shielding element, CP2 is the maximum thickness of the second light-shielding element, CP3 is the maximum thickness of the third light-shielding element, EP12 is the axial distance from the image side of the first light-shielding element to the object side of the second light-shielding element, and EP23 is the axial distance from the image side of the second light-shielding element to the object side of the third light-shielding element. The camera lens satisfies: 3.58≤f45 / (EP45+CP5+EP56) ≤6.68, where f45 is the combined focal length of the fourth lens and the fifth lens, EP45 is the axial distance from the image side of the fourth light-shielding element to the object side of the fifth light-shielding element, EP56 is the axial distance from the image side of the fifth light-shielding element to the object side of the sixth light-shielding element, and CP5 is the maximum thickness of the fifth light-shielding element.

2. The camera lens according to claim 1, characterized in that, The camera lens satisfies: 36.42≤T23 / CP2+T34 / CP3≤42.81, where CP2 is the maximum thickness of the second light-shielding element, CP3 is the maximum thickness of the third light-shielding element, T23 is the axial distance from the image side of the second lens to the object side of the third lens, and T34 is the axial distance from the image side of the third lens to the object side of the fourth lens.

3. The camera lens according to claim 1, characterized in that, The camera lens satisfies: 1.29≤EP34 / CT4*N4≤3.50, where EP34 is the axial distance from the image side of the third light-shielding element to the object side of the fourth light-shielding element, CT4 is the center thickness of the fourth lens, and N4 is the refractive index of the fourth lens.

4. The camera lens according to claim 1, characterized in that, The camera lens satisfies: 13.37≤f6 / EP56-f7 / EP67≤22.35, where f6 is the effective focal length of the sixth lens, f7 is the effective focal length of the seventh lens, EP56 is the axial distance from the image side of the fifth light-shielding element to the object side of the sixth light-shielding element, and EP67 is the axial distance from the image side of the sixth light-shielding element to the object side of the seventh light-shielding element.

5. The camera lens according to any one of claims 1 to 4, characterized in that, The camera lens satisfies: -16.36≤f7 / EP67*N7≤-6.15, where f7 is the effective focal length of the seventh lens, EP67 is the axial distance from the image side of the sixth light-shielding element to the object side of the seventh light-shielding element, and N7 is the refractive index of the seventh lens.

6. The camera lens according to any one of claims 1 to 4, characterized in that, The camera lens satisfies: 5.61≤f / (CP5+CP6) ≤11.52, where f is the focal length of the camera lens, CP5 is the maximum thickness of the fifth light-shielding element, and CP6 is the maximum thickness of the sixth light-shielding element.

7. The camera lens according to any one of claims 1 to 4, characterized in that, The lens group further includes a fourth auxiliary light-shielding element, which is located between the fourth light-shielding element and the fifth lens.

8. The camera lens according to any one of claims 1 to 4, characterized in that, The lens group further includes a fifth auxiliary light-shielding element, which is located between the fifth light-shielding element and the sixth lens.

9. The camera lens according to any one of claims 1 to 4, characterized in that, The lens group further includes a sixth auxiliary light-shielding element, which is located between the sixth light-shielding element and the seventh lens.

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