Camera lens

Abstract

The present invention provides a camera lens comprising a first lens, a second lens, a third lens, a fourth lens, a fifth lens, a sixth lens, a seventh lens, and an eighth lens. The first lens has a focal power; the second lens has a negative focal power; the third lens has a positive focal power; the fourth lens has a focal power; the fifth lens has a positive focal power; the sixth lens has a positive focal power; the seventh lens has a positive focal power; and the eighth lens has a negative focal power. The present invention solves the problem of poor imaging quality in existing camera lenses.

Description

Technical Field

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

[0002] In recent years, smartphone cameras have rapidly developed, leading to a growing demand for mobile phone lenses and increasing expectations for image quality. The upgrade and iteration of mobile phone lenses has become a crucial component of mobile phone upgrades. With each upgrade, the image quality of mobile phone lenses has been significantly improved, and conventional 5P and 6P lenses are no longer able to meet these requirements. Therefore, high-lens-count, high-pixel, large-image-format mobile phone lenses have become an industry trend and are generating significant market demand. High-lens-count, large-image-format mobile phone lenses offer higher resolution, and when combined with large-pixel chips, they offer greater sensitivity and superior image quality, which are expected to gain increasing favor among consumers and mobile phone manufacturers.

[0003] That is to say, the camera lens in the prior art has the problem of poor imaging quality. Summary of the Invention

[0004] The main purpose of the present invention is to provide a camera lens to solve the problem of poor imaging quality of the camera lens in the prior art.

[0005] In order to achieve the above-mentioned object, according to one aspect of the present invention, a camera lens is provided, comprising: a first lens having optical focal power; a second lens having negative optical focal power; a third lens having positive optical focal power; a fourth lens having optical focal power; a fifth lens having positive optical focal power; a sixth lens having positive optical focal power; a seventh lens having positive optical focal power; and an eighth lens having negative optical focal power.

[0006] Furthermore, the image-side surface of the third lens is a convex surface.

[0007] Furthermore, the curvature radius R1 of the object side surface of the first lens, the curvature radius R2 of the image side surface of the first lens, the effective focal length f1 of the first lens, and the effective focal length f of the camera lens satisfy the following relationship: 3.0<(R1+R2) / (f1-f)<8.5.

[0008] Furthermore, the effective focal length f2 of the second lens, the effective focal length f of the camera lens, and the curvature radius R4 of the image side surface of the second lens satisfy the following relationship: -5.5<(f2-f) / R4<-1.5.

[0009] Furthermore, the effective focal length f3 of the third lens, the air gap T23 between the second lens and the third lens on the optical axis of the camera lens, and the curvature radius R6 of the image side surface of the third lens satisfy: -2.5<f3*T23 / (R6*T23)<0.

[0010] Furthermore, the effective focal length f6 of the sixth lens, the curvature radius R9 of the object-side surface of the fifth lens, the curvature radius R10 of the image-side surface of the fifth lens, and the curvature radius R12 of the image-side surface of the sixth lens satisfy the following relationship: 2.5<f6 / R12+R9 / R10<8.5.

[0011] Furthermore, the curvature radius R5 of the object side surface of the third lens, the curvature radius R11 of the object side surface of the sixth lens, the air gap T34 between the third lens and the fourth lens on the optical axis of the camera lens, and the air gap T67 between the sixth lens and the seventh lens on the optical axis satisfy the following relationship: 3.5<|R11*T67 / (R5*T34)|<15.0.

[0012] Furthermore, the curvature radius R13 of the object-side surface of the seventh lens, the curvature radius R16 of the image-side surface of the eighth lens, the effective focal length f of the camera lens, and the effective focal length f8 of the eighth lens satisfy: -6.0<R13 / R16*(f / f8)<-1.0.

[0013] Furthermore, the center thickness CT6 of the sixth lens on the optical axis of the camera lens, the center thickness CT7 of the seventh lens on the optical axis, and the air gap T67 between the sixth lens and the seventh lens on the optical axis satisfy: 1.0<T67 / (CT6+CT7)<2.5.

[0014] Furthermore, the center thickness CT2 of the second lens on the optical axis of the camera lens, the center thickness CT3 of the third lens on the optical axis, and the air interval T23 between the second lens and the third lens on the optical axis satisfy: 1.0<CT3 / (CT2+T23)<3.0.

[0015] Furthermore, an air interval T45 between the fourth lens and the fifth lens on the optical axis of the imaging lens and an air interval T78 between the seventh lens and the eighth lens on the optical axis satisfy the following relationship: 1.0<T78 / T45<6.0.

[0016] According to another aspect of the present invention, there is provided a camera lens, comprising: a first lens having optical power; a second lens having negative optical power; a third lens having positive optical power; a fourth lens having optical power; a fifth lens having positive optical power; a sixth lens having positive optical power; a seventh lens having positive optical power; and an eighth lens having negative optical power; wherein half the diagonal length of an effective pixel area on an imaging plane of the camera lens, ImgH, satisfies the following requirement: ImgH>8.0mm.

[0017] Furthermore, the image-side surface of the third lens is a convex surface.

[0018] Furthermore, the curvature radius R1 of the object side surface of the first lens, the curvature radius R2 of the image side surface of the first lens, the effective focal length f1 of the first lens, and the effective focal length f of the camera lens satisfy the following relationship: 3.0<(R1+R2) / (f1-f)<8.5.

[0019] Furthermore, the effective focal length f2 of the second lens, the effective focal length f of the camera lens, and the curvature radius R4 of the image side surface of the second lens satisfy the following relationship: -5.5<(f2-f) / R4<-1.5.

[0020] Furthermore, the effective focal length f3 of the third lens, the air gap T23 between the second lens and the third lens on the optical axis of the camera lens, and the curvature radius R6 of the image side surface of the third lens satisfy: -2.5<f3*T23 / (R6*T23)<0.

[0021] Furthermore, the effective focal length f6 of the sixth lens, the curvature radius R9 of the object-side surface of the fifth lens, the curvature radius R10 of the image-side surface of the fifth lens, and the curvature radius R12 of the image-side surface of the sixth lens satisfy the following relationship: 2.5<f6 / R12+R9 / R10<8.5.

[0022] Furthermore, the curvature radius R5 of the object side surface of the third lens, the curvature radius R11 of the object side surface of the sixth lens, the air gap T34 between the third lens and the fourth lens on the optical axis of the camera lens, and the air gap T67 between the sixth lens and the seventh lens on the optical axis satisfy the following relationship: 3.5<|R11*T67 / (R5*T34)|<15.0.

[0023] Furthermore, the curvature radius R13 of the object-side surface of the seventh lens, the curvature radius R16 of the image-side surface of the eighth lens, the effective focal length f of the camera lens, and the effective focal length f8 of the eighth lens satisfy: -6.0<R13 / R16*(f / f8)<-1.0.

[0024] Furthermore, the center thickness CT6 of the sixth lens on the optical axis of the camera lens, the center thickness CT7 of the seventh lens on the optical axis, and the air gap T67 between the sixth lens and the seventh lens on the optical axis satisfy: 1.0<T67 / (CT6+CT7)<2.5.

[0025] Furthermore, the center thickness CT2 of the second lens on the optical axis of the camera lens, the center thickness CT3 of the third lens on the optical axis, and the air interval T23 between the second lens and the third lens on the optical axis satisfy: 1.0<CT3 / (CT2+T23)<3.0.

[0026] Furthermore, an air interval T45 between the fourth lens and the fifth lens on the optical axis of the imaging lens and an air interval T78 between the seventh lens and the eighth lens on the optical axis satisfy the following relationship: 1.0<T78 / T45<6.0.

[0027] According to the technical solution of the present invention, a camera lens includes a first lens, a second lens, a third lens, a fourth lens, a fifth lens, a sixth lens, a seventh lens, and an eighth lens. The first lens has a focal power; the second lens has a negative focal power; the third lens has a positive focal power; the fourth lens has a focal power; the fifth lens has a positive focal power; the sixth lens has a positive focal power; the seventh lens has a positive focal power; and the eighth lens has a negative focal power.

[0028] The first lens is a post-aperture lens. This lens has a focal power that allows as much light as possible within the field of view angle to enter the rear optical system, thereby achieving greater transmittance. The second lens is set to have a negative focal power, which can diverge the light emitted by the first lens to obtain a larger image surface. The third lens is set to have a positive focal power, which can converge the light emitted by the second lens to reduce the degree of light deflection, which is beneficial for reducing aberrations. At the same time, it is matched with a fourth lens with a focal power to reduce aberrations. The fifth, sixth, and seventh lenses are all set to have positive focal power, so that the light is converged once when passing through the fifth lens, once when passing through the sixth lens, and then once again when passing through the seventh lens, thereby balancing the aberrations generated by the front lens to ensure the imaging quality of the camera lens. The light is diffused by the eighth lens and then imaged onto the imaging surface, while obtaining a larger image surface. While obtaining a large image surface, the imaging quality of the camera lens is guaranteed. Properly allocating the optical power and surface shape of the various lenses that comprise the lens effectively balances the spherical and chromatic aberrations produced by these lenses, significantly improving image quality. Properly controlling the optical power of the eighth lens also prevents deformation during assembly, allowing for greater flexibility in molding and debugging, and avoiding the risk of stray light caused by cosmetic issues with the eighth lens. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] The accompanying drawings, which constitute part of this application, are intended to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are intended to explain the present invention and do not constitute an undue limitation of the present invention. In the accompanying drawings:

[0030] Figure 1 A schematic structural diagram of a camera lens according to Example 1 of the present invention is shown;

[0031] Figures 2 to 5 Shown Figure 1 The axial chromatic aberration curve, astigmatism curve, distortion curve and magnification chromatic aberration curve of the camera lens;

[0032] Figure 6 A schematic structural diagram of a camera lens according to Example 2 of the present invention is shown;

[0033] Figures 7 to 10 Shown Figure 6 The axial chromatic aberration curve, astigmatism curve, distortion curve and magnification chromatic aberration curve of the camera lens;

[0034] Figure 11 A schematic structural diagram of a camera lens according to Example 3 of the present invention is shown;

[0035] Figures 12 to 15 Shown Figure 11 The axial chromatic aberration curve, astigmatism curve, distortion curve and magnification chromatic aberration curve of the camera lens;

[0036] Figure 16 1. A schematic structural diagram of a camera lens according to Example 4 of the present invention is shown;

[0037] Figures 17 to 20 Shown Figure 16 The axial chromatic aberration curve, astigmatism curve, distortion curve and magnification chromatic aberration curve of the camera lens;

[0038] Figure 21 A schematic structural diagram of a camera lens according to Example 5 of the present invention is shown;

[0039] Figures 22 to 25 Shown Figure 21 The axial chromatic aberration curve, astigmatism curve, distortion curve and magnification chromatic aberration curve of the camera lens;

[0040] Figure 26 1. A schematic structural diagram of a camera lens according to Example 6 of the present invention is shown;

[0041] Figures 27 to 30 Shown Figure 26 The axial chromatic aberration curve, astigmatism curve, distortion curve and magnification chromatic aberration curve of the camera lens;

[0042] Figure 31 1. A schematic structural diagram of a camera lens according to Example 7 of the present invention is shown;

[0043] Figures 32 to 35 Shown Figure 31 The axial chromatic aberration curve, astigmatism curve, distortion curve and magnification chromatic aberration curve of the camera lens;

[0044] Figure 36 1. A schematic structural diagram of a camera lens according to Example 8 of the present invention is shown;

[0045] Figures 37 to 40 Shown Figure 36 The axial chromatic aberration curve, astigmatism curve, distortion curve and magnification chromatic aberration curve of the camera lens;

[0046] The above drawings include the following reference numerals:

[0047] 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, seventh lens; S13, object-side surface of the seventh lens; S14, image-side surface of the seventh lens; E8, eighth lens; S15, object-side surface of the eighth lens; S16, image-side surface of the eighth lens; E9, filter; S17, object-side surface of the filter; S18, image-side surface of the filter; S19, imaging surface. DETAILED DESCRIPTION

[0048] It should be noted that, in the absence of conflict, the embodiments and features of the embodiments in this application can be combined with each other. The present invention will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0049] It should be noted that, unless otherwise specified, all technical and scientific terms used in this application have the same meaning as commonly understood by ordinary technicians in the technical field to which this application belongs.

[0050] In the present invention, unless otherwise specified, the directional words used, such as "up, down, top, bottom", usually refer to the directions shown in the drawings, or to the components themselves in the vertical, perpendicular or gravity direction; similarly, for ease of understanding and description, "inside and outside" refer to the inside and outside relative to the outline of each component itself, but the above directional words are not used to limit the present invention.

[0051] It should be noted that in this specification, the terms "first," "second," "third," etc., are used solely to distinguish one feature from another and do not limit the features. Thus, the first lens discussed below could also be referred to as the second lens or the third lens without departing from the teachings of this application.

[0052] In the drawings, the thickness, size, and shape of the lenses are slightly exaggerated for ease of illustration. Specifically, the shapes of the spherical and aspherical surfaces shown in the drawings are provided by way of example. That is, the shapes of the spherical and aspherical surfaces are not limited to those shown in the drawings. The drawings are for illustration only and are not drawn strictly to scale.

[0053] In this article, the paraxial area refers to the area near the optical axis. If the lens surface is convex and the position of the convex surface is not defined, it means that the lens surface is convex at least in the paraxial area; if the lens surface is concave and the position of the concave surface is not defined, it means that the lens surface is concave at least in the paraxial area. The judgment of the surface shape in the paraxial area can be based on the judgment method of ordinary knowledge in this field, and the positive and negative R value (R refers to the radius of curvature of the paraxial area, usually refers to the R value on the lens database (lens data) in the optical software) is used to judge the convexity and concavity. For the object side, when the R value is positive, it is judged to be convex, and when the R value is negative, it is judged to be concave; for the image side, when the R value is positive, it is judged to be concave, and when the R value is negative, it is judged to be convex.

[0054] To address the poor imaging quality of existing camera lenses, the present invention provides a camera lens. This application provides a large-image-area camera lens with eight lenses, intended for use with mobile phone chips larger than one inch. This lens exhibits extremely high pixel values and a large aperture, enabling a good depth of field. The camera lens in this application is designed to have a high MTF value, and the entire lens is relatively small and lightweight, offering promising application prospects.

[0055] Example 1

[0056] like Figures 1 to 40 As shown, the camera lens includes a first lens, a second lens, a third lens, a fourth lens, a fifth lens, a sixth lens, a seventh lens, and an eighth lens. The first lens has optical power; the second lens has negative optical power; the third lens has positive optical power; the fourth lens has optical power; the fifth lens has positive optical power; the sixth lens has positive optical power; the seventh lens has positive optical power; and the eighth lens has negative optical power.

[0057] The first lens is a post-aperture lens. This lens has a focal power that allows as much light as possible within the field of view angle to enter the rear optical system, thereby achieving greater transmittance. The second lens is set to have a negative focal power, which can diverge the light emitted by the first lens to obtain a larger image surface. The third lens is set to have a positive focal power, which can converge the light emitted by the second lens to reduce the degree of light deflection, which is beneficial for reducing aberrations. At the same time, it is matched with a fourth lens with a focal power to reduce aberrations. The fifth, sixth, and seventh lenses are all set to have positive focal power, so that the light is converged once when passing through the fifth lens, once when passing through the sixth lens, and then once again when passing through the seventh lens, thereby balancing the aberrations generated by the front lens to ensure the imaging quality of the camera lens. The light is diffused by the eighth lens and then imaged onto the imaging surface, while obtaining a larger image surface. While obtaining a large image surface, the imaging quality of the camera lens is guaranteed. Properly allocating the optical power and surface shape of the various lenses that comprise the lens effectively balances the spherical and chromatic aberrations produced by these lenses, significantly improving image quality. Properly controlling the optical power of the eighth lens also prevents deformation during assembly, allowing for greater flexibility in molding and debugging, and avoiding the risk of stray light caused by cosmetic issues with the eighth lens.

[0058] In this embodiment, the image-side surface of the third lens is convex. Setting the image-side surface of the third lens to a convex surface can effectively control the direction of light, ensuring that the light can obtain a large lifting effect after passing through the third lens, making it possible to form an ultra-large image surface, thereby accommodating the use of larger chips.

[0059] In this embodiment, the curvature radius R1 of the object side surface of the first lens, the curvature radius R2 of the image side surface of the first lens, the effective focal length f1 of the first lens, and the effective focal length f of the camera lens satisfy the following relationship: 3.0<(R1+R2) / (f1-f)<8.5. By limiting (R1+R2) / (f1-f) within a reasonable range, the curvature radii of the two sides of the first lens can be effectively constrained, and a good ratio range is found between balancing the effective lens of the first lens and the effective focal length of the camera lens. Within this ratio range, (R1+R2) / (f1-f) can effectively reduce the sensitivity of the first lens and achieve a better imaging effect. Preferably, 3.2<(R1+R2) / (f1-f)<8.45.

[0060] In this embodiment, the effective focal length f2 of the second lens, the effective focal length f of the camera lens, and the radius of curvature R4 of the image side surface of the second lens satisfy the following relationship: -5.5 < (f2 - f) / R4 < -1.5. Reasonable control of the difference between the effective focal length of the second lens and the effective focal length of the entire camera lens, as well as the radius of curvature of the image side surface of the second lens, within an effective range can constrain the refractive properties of the second lens, allowing the second lens to occupy a smoother position within the entire camera lens, paving the way for subsequent light to be further elevated. Preferably, -5.4 < (f2 - f) / R4 < -1.55.

[0061] In this embodiment, the effective focal length f3 of the third lens, the air gap T23 between the second and third lenses on the optical axis of the camera lens, and the radius of curvature R6 of the image-side surface of the third lens satisfy the following conditions: -2.5 < f3*T23 / (R6*T23) < 0. By limiting f3*T23 / (R6*T23) to a reasonable range, the shape of the third lens can be effectively constrained, allowing light passing through the third lens to acquire an off-axis tilt angle. This, in conjunction with subsequent lens formation, allows the light to achieve a larger ImgH value. Preferably, -2.3 < f3*T23 / (R6*T23) < -0.2.

[0062] In this embodiment, the effective focal length f6 of the sixth lens, the radius of curvature R9 of the object-side surface of the fifth lens, the radius of curvature R10 of the image-side surface of the fifth lens, and the radius of curvature R12 of the image-side surface of the sixth lens satisfy the following relationship: 2.5 < f6 / R12 + R9 / R10 < 8.5. By limiting f6 / R12 + R9 / R10 to a reasonable range, the aberration curve of the camera lens can be effectively constrained through combined control, balancing the field curvature and distortion values of the camera lens, thereby ensuring the imaging quality of the camera lens. Preferably, 2.52 < f6 / R12 + R9 / R10 < 8.4.

[0063] In this embodiment, the radius of curvature R5 of the object side of the third lens, the radius of curvature R11 of the object side of the sixth lens, the air gap T34 between the third and fourth lenses on the optical axis of the camera lens, and the air gap T67 between the sixth and seventh lenses on the optical axis satisfy the following conditions: 3.5 < |R11*T67 / (R5*T34)| < 15.0. By controlling |R11*T67 / (R5*T34)| within a reasonable range, the radius of curvature of the third and sixth lenses can be effectively adjusted to avoid excessive disproportion. This also balances the light distribution of the entire camera lens, facilitates the molding and assembly process, and reduces lens sensitivity. Preferably, 3.7 < |R11*T67 / (R5*T34)| < 14.9.

[0064] In this embodiment, the radius of curvature R13 of the object-side surface of the seventh lens element, the radius of curvature R16 of the image-side surface of the eighth lens element, the effective focal length f of the camera lens, and the effective focal length f8 of the eighth lens element satisfy the following relationship: -6.0 < R13 / R16*(f / f8) < -1.0. By limiting R13 / R16*(f / f8) to a reasonable range, the path of light between the seventh and eighth lenses can be effectively limited, preventing energy loss due to excessively steep light paths and reducing the generation of ghost images. Preferably, -5.5 < R13 / R16*(f / f8) < -1.2.

[0065] In this embodiment, the center thickness CT6 of the sixth lens on the optical axis of the camera lens, the center thickness CT7 of the seventh lens on the optical axis, and the air spacing T67 between the sixth and seventh lenses on the optical axis satisfy the following conditions: 1.0 < T67 / (CT6 + CT7) < 2.5. By limiting T67 / (CT6 + CT7) to a reasonable range, the center thicknesses of the sixth and seventh lenses on the optical axis can be coordinated, ensuring a certain molding strength for the sixth and seventh lenses. When the air spacing between the sixth and seventh lenses on the optical axis is within a certain minimum range, the lenses maintain good strength, preventing the impact of the molding process on the lens stability, improving field curvature stability, and contributing to improved MTF. Preferably, 1.1 < T67 / (CT6 + CT7) < 2.3.

[0066] In this embodiment, the center thickness CT2 of the second lens on the optical axis of the camera lens, the center thickness CT3 of the third lens on the optical axis, and the air gap T23 between the second and third lenses on the optical axis satisfy the following relationship: 1.0 < CT3 / (CT2 + T23) < 3.0. By limiting CT3 / (CT2 + T23) to a reasonable range, the structural strength of the third lens can be effectively guaranteed. By properly allocating the strength of the second lens and the corresponding air gap value, the light deflection between the second and third lenses can be reduced. The combination of the two can effectively reduce the distortion and aberration caused by the camera lens and reduce the risk of stray light in the camera lens. Preferably, 1.0 < CT3 / (CT2 + T23) < 2.8.

[0067] In this embodiment, the air gap T45 between the fourth and fifth lenses on the optical axis of the camera lens, and the air gap T78 between the seventh and eighth lenses on the optical axis, satisfy the following relationship: 1.0 < T78 / T45 < 6.0. By controlling T78 / T45 within a reasonable range, the positions of the various lenses in the camera lens are effectively controlled, allowing light to pass through each lens as smoothly as possible. Controlling T78 and T45 constrains the optical path of light during its rapid rise through the lens and its final arrival at the image plane, ensuring lens processing and assembly characteristics and avoiding potential lens interference issues caused by excessively small gaps. This facilitates adjusting the field distribution of the camera lens, reducing sensitivity, and achieving better imaging quality. Preferably, 1.0 < T78 / T45 < 5.8.

[0068] Example 2

[0069] like Figures 1 to 40 As shown, the camera lens includes a first lens, a second lens, a third lens, a fourth lens, a fifth lens, a sixth lens, a seventh lens, and an eighth lens. The first lens has an optical focal power; the second lens has a negative optical focal power; the third lens has a positive optical focal power; the fourth lens has an optical focal power; the fifth lens has a positive optical focal power; the sixth lens has a positive optical focal power; the seventh lens has a positive optical focal power; and the eighth lens has a negative optical focal power. Wherein, half of the diagonal length of the effective pixel area on the imaging plane of the camera lens, ImgH, satisfies the following conditions: ImgH>8.0mm.

[0070] The first lens is a post-aperture lens. This lens has a focal power that allows as much light as possible within the field of view angle to enter the rear optical system, thereby achieving greater transmittance. The second lens is set to have a negative focal power, which can diverge the light emitted by the first lens to obtain a larger image surface. The third lens is set to have a positive focal power, which can converge the light emitted by the second lens to reduce the degree of light deflection, which is beneficial for reducing aberrations. At the same time, it is matched with a fourth lens with a focal power to reduce aberrations. The fifth, sixth, and seventh lenses are all set to have positive focal power, so that the light is converged once when passing through the fifth lens, once when passing through the sixth lens, and then once again when passing through the seventh lens, thereby balancing the aberrations generated by the front lens to ensure the imaging quality of the camera lens. The light is diffused by the eighth lens and then imaged onto the imaging surface, while obtaining a larger image surface. While obtaining a large image surface, the imaging quality of the camera lens is guaranteed. Properly allocating the optical power and surface shape of the various lenses that make up the lens can effectively balance the spherical and chromatic aberrations produced by these lenses, significantly improving image quality. Properly controlling the optical power of the eighth lens also ensures that it is not easily deformed during assembly, allowing for greater latitude in molding and debugging processes, and avoiding the risk of stray light caused by cosmetic issues with the eighth lens. The diagonal length of the effective pixel area on the image plane must be greater than 16.0mm. This size of image plane corresponds to a mobile phone chip size of at least 1 inch. This long diagonal length provides a vast pixel space for photographic imaging, enabling the pixel value of the mobile phone to be upgraded to 200 million pixels or more.

[0071] Preferably, half of the diagonal length ImgH of the effective pixel area on the imaging plane of the camera lens satisfies: ImgH>8.2mm.

[0072] In this embodiment, the image-side surface of the third lens is convex. Setting the image-side surface of the third lens to a convex surface can effectively control the direction of light, ensuring that the light can obtain a large lifting effect after passing through the third lens, making it possible to form an ultra-large image surface, thereby accommodating the use of larger chips.

[0073] In this embodiment, the curvature radius R1 of the object side surface of the first lens, the curvature radius R2 of the image side surface of the first lens, the effective focal length f1 of the first lens, and the effective focal length f of the camera lens satisfy the following relationship: 3.0<(R1+R2) / (f1-f)<8.5. By limiting (R1+R2) / (f1-f) within a reasonable range, the curvature radii of the two sides of the first lens can be effectively constrained, and a good ratio range is found between balancing the effective lens of the first lens and the effective focal length of the camera lens. Within this ratio range, (R1+R2) / (f1-f) can effectively reduce the sensitivity of the first lens and achieve a better imaging effect. Preferably, 3.2<(R1+R2) / (f1-f)<8.45.

[0074] In this embodiment, the effective focal length f2 of the second lens, the effective focal length f of the camera lens, and the radius of curvature R4 of the image side surface of the second lens satisfy the following relationship: -5.5 < (f2 - f) / R4 < -1.5. Reasonable control of the difference between the effective focal length of the second lens and the effective focal length of the entire camera lens, as well as the radius of curvature of the image side surface of the second lens, within an effective range can constrain the refractive properties of the second lens, allowing the second lens to occupy a smoother position within the entire camera lens, paving the way for subsequent light to be further elevated. Preferably, -5.4 < (f2 - f) / R4 < -1.55.

[0075] In this embodiment, the effective focal length f3 of the third lens, the air gap T23 between the second and third lenses on the optical axis of the camera lens, and the radius of curvature R6 of the image-side surface of the third lens satisfy the following conditions: -2.5 < f3*T23 / (R6*T23) < 0. By limiting f3*T23 / (R6*T23) to a reasonable range, the shape of the third lens can be effectively constrained, allowing light passing through the third lens to acquire an off-axis tilt angle. This, in conjunction with subsequent lens formation, allows the light to achieve a larger ImgH value. Preferably, -2.3 < f3*T23 / (R6*T23) < -0.2.

[0076] In this embodiment, the effective focal length f6 of the sixth lens, the radius of curvature R9 of the object-side surface of the fifth lens, the radius of curvature R10 of the image-side surface of the fifth lens, and the radius of curvature R12 of the image-side surface of the sixth lens satisfy the following relationship: 2.5 < f6 / R12 + R9 / R10 < 8.5. By limiting f6 / R12 + R9 / R10 to a reasonable range, the aberration curve of the camera lens can be effectively constrained through combined control, balancing the field curvature and distortion values of the camera lens, thereby ensuring the imaging quality of the camera lens. Preferably, 2.52 < f6 / R12 + R9 / R10 < 8.4.

[0077] In this embodiment, the radius of curvature R5 of the object side of the third lens, the radius of curvature R11 of the object side of the sixth lens, the air gap T34 between the third and fourth lenses on the optical axis of the camera lens, and the air gap T67 between the sixth and seventh lenses on the optical axis satisfy the following conditions: 3.5 < |R11*T67 / (R5*T34)| < 15.0. By controlling |R11*T67 / (R5*T34)| within a reasonable range, the radius of curvature of the third and sixth lenses can be effectively adjusted to avoid excessive disproportion. This also balances the light distribution of the entire camera lens, facilitates the molding and assembly process, and reduces lens sensitivity. Preferably, 3.7 < |R11*T67 / (R5*T34)| < 14.9.

[0078] In this embodiment, the radius of curvature R13 of the object-side surface of the seventh lens element, the radius of curvature R16 of the image-side surface of the eighth lens element, the effective focal length f of the camera lens, and the effective focal length f8 of the eighth lens element satisfy the following relationship: -6.0 < R13 / R16*(f / f8) < -1.0. By limiting R13 / R16*(f / f8) to a reasonable range, the path of light between the seventh and eighth lenses can be effectively limited, preventing energy loss due to excessively steep light paths and reducing the generation of ghost images. Preferably, -5.5 < R13 / R16*(f / f8) < -1.2.

[0079] In this embodiment, the center thickness CT6 of the sixth lens on the optical axis of the camera lens, the center thickness CT7 of the seventh lens on the optical axis, and the air spacing T67 between the sixth and seventh lenses on the optical axis satisfy the following conditions: 1.0 < T67 / (CT6 + CT7) < 2.5. By limiting T67 / (CT6 + CT7) to a reasonable range, the center thicknesses of the sixth and seventh lenses on the optical axis can be coordinated, ensuring a certain molding strength for the sixth and seventh lenses. When the air spacing between the sixth and seventh lenses on the optical axis is within a certain minimum range, the lenses maintain good strength, preventing the impact of the molding process on the lens stability, improving field curvature stability, and contributing to improved MTF. Preferably, 1.1 < T67 / (CT6 + CT7) < 2.3.

[0080] In this embodiment, the center thickness CT2 of the second lens on the optical axis of the camera lens, the center thickness CT3 of the third lens on the optical axis, and the air gap T23 between the second and third lenses on the optical axis satisfy the following relationship: 1.0 < CT3 / (CT2 + T23) < 3.0. By limiting CT3 / (CT2 + T23) to a reasonable range, the structural strength of the third lens can be effectively guaranteed. By properly allocating the strength of the second lens and the corresponding air gap value, the light deflection between the second and third lenses can be reduced. The combination of the two can effectively reduce the distortion and aberration caused by the camera lens and reduce the risk of stray light in the camera lens. Preferably, 1.0 < CT3 / (CT2 + T23) < 2.8.

[0081] In this embodiment, the air gap T45 between the fourth and fifth lenses on the optical axis of the camera lens, and the air gap T78 between the seventh and eighth lenses on the optical axis, satisfy the following relationship: 1.0 < T78 / T45 < 6.0. By controlling T78 / T45 within a reasonable range, the positions of the various lenses in the camera lens are effectively controlled, allowing light to pass through each lens as smoothly as possible. Controlling T78 and T45 constrains the optical path of light during its rapid rise through the lens and its final arrival at the image plane, ensuring lens processing and assembly characteristics and avoiding potential lens interference issues caused by excessively small gaps. This facilitates adjusting the field distribution of the camera lens, reducing sensitivity, and achieving better imaging quality. Preferably, 1.0 < T78 / T45 < 5.8.

[0082] Optionally, the camera lens may further include a filter for correcting color deviation and / or a protective glass for protecting a photosensitive element located on the imaging surface.

[0083] The camera lens in this application can use multiple lenses, such as the eight lenses mentioned above. By properly allocating the optical power, surface shape, center thickness of each lens, and the on-axis distance between lenses, the imaging quality of the camera lens can be effectively improved, the sensitivity of the camera lens can be reduced, and the processability of the camera lens can be improved, making the camera lens more convenient for production and processing and suitable for portable electronic devices such as smartphones.

[0084] In this application, at least one of the lens surfaces is an aspheric surface. Aspheric lenses are characterized by a continuously varying curvature from the center to the periphery. Unlike spherical lenses, which have a constant curvature from the center to the periphery, aspheric lenses have a more optimized curvature radius, offering advantages in reducing distortion and astigmatism. The use of aspheric lenses minimizes aberrations that occur during imaging, thereby improving image quality.

[0085] However, those skilled in the art will appreciate that the number of lenses comprising the imaging lens can be varied to achieve the various results and advantages described herein without departing from the claimed technical solutions. For example, while the embodiments describe an imaging lens using eight lenses as an example, the imaging lens is not limited to eight lenses. If desired, the imaging lens may include other numbers of lenses.

[0086] The following further describes examples of specific surface shapes and parameters of the camera lens applicable to the above-mentioned embodiment with reference to the accompanying drawings.

[0087] It should be noted that any one of the following examples 1 to 8 is applicable to all embodiments of the present application.

[0088] Example 1

[0089] like Figures 1 to 5 As shown, the camera lens of Example 1 of the present application is described. Figure 1 A schematic structural diagram of a camera lens in Example 1 is shown.

[0090] like Figure 1 As shown, the camera lens includes, from the object side to the image side, an aperture STO, a first lens E1, an aperture STO, a second lens E2, a third lens E3, a fourth lens E4, a fifth lens E5, a sixth lens E6, a seventh lens E7, an eighth lens E8, a filter E and an imaging surface S19.

[0091] The first lens E1 has positive focal power, with its object-side surface S1 being convex and its image-side surface S2 being concave. The second lens E2 has negative focal power, with its object-side surface S3 being convex and its image-side surface S4 being concave. The third lens E3 has positive focal power, with its object-side surface S5 being convex and its image-side surface S6 being convex. The fourth lens E4 has negative focal power, with its object-side surface S7 being concave and its image-side surface S8 being concave. The fifth lens E5 has positive focal power, with its object-side surface S9 being concave and its image-side surface S10 being convex. The sixth lens E6 has positive focal power, with its object-side surface S11 being convex and its image-side surface S12 being concave. The seventh lens E7 has positive focal power, with its object-side surface S13 being convex and its image-side surface S14 being concave. The eighth lens element E8 has negative power. Its object-side surface S15 is convex, and its image-side surface S16 is concave. The filter E9 has an object-side surface S17 and an image-side surface S18. Light from an object passes through surfaces S1 to S18 in sequence and is ultimately imaged on imaging surface S19.

[0092] In this example, the image height ImgH of the camera lens is 8.31 mm, and the total length TTL of the camera lens is 11.90 mm.

[0093] Table 1 shows the basic structural parameters of the camera lens of Example 1, wherein the units of curvature radius, thickness / distance, and focal length are all millimeters (mm).

[0094]

[0095]

[0096] Table 1

[0097] In Example 1, the object-side surface and the image-side surface of any lens from the first lens E1 to the eighth lens E8 are both aspherical surfaces. The surface shape of each aspherical lens can be defined by, but is not limited to, the following aspherical surface formula:

[0098]

[0099] Where x is the distance vector from the vertex of the aspheric surface at a height of h along the optical axis; c is the paraxial curvature of the aspheric surface, c = 1 / R (i.e., 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 correction coefficient for the i-th order of the aspheric surface. Table 2 below lists the high-order coefficients A4, A6, A8, A10, A12, A14, A16, A18, A20, A22, A24, A26, A28, and A30 that can be used for each aspheric mirror surface S1-S16 in Example 1.

[0100]

[0101]

[0102] Table 2

[0103] Figure 2 The axial chromatic aberration curve of the camera lens of Example 1 is shown, which indicates the deviation of the focal point of light of different wavelengths after passing through the camera lens. Figure 3 The astigmatism curve of the imaging lens of Example 1 is shown, which indicates meridional field curvature and sagittal field curvature. Figure 4 The distortion curve of the camera lens of Example 1 is shown, which represents the distortion magnitude values corresponding to different field angles. Figure 5 The chromatic aberration curve of the camera lens of Example 1 is shown, which represents the deviation of different image heights on the imaging surface after the light passes through the camera lens.

[0104] according to Figures 2 to 5 It can be seen that the camera lens given in Example 1 can achieve good imaging quality.

[0105] Example 2

[0106] like Figures 6 to 10 As shown, the camera lens of Example 2 of this application is described. Figure 6 A schematic structural diagram of the camera lens of Example 2 is shown.

[0107] like Figure 6 As shown, the camera lens includes, from the object side to the image side, an aperture STO, a first lens E1, an aperture STO, a second lens E2, a third lens E3, a fourth lens E4, a fifth lens E5, a sixth lens E6, a seventh lens E7, an eighth lens E8, a filter E and an imaging surface S19.

[0108] The first lens E1 has positive focal power, with its object-side surface S1 being convex and its image-side surface S2 being concave. The second lens E2 has negative focal power, with its object-side surface S3 being convex and its image-side surface S4 being concave. The third lens E3 has positive focal power, with its object-side surface S5 being convex and its image-side surface S6 being convex. The fourth lens E4 has negative focal power, with its object-side surface S7 being concave and its image-side surface S8 being convex. The fifth lens E5 has positive focal power, with its object-side surface S9 being concave and its image-side surface S10 being convex. The sixth lens E6 has positive focal power, with its object-side surface S11 being convex and its image-side surface S12 being concave. The seventh lens E7 has positive focal power, with its object-side surface S13 being convex and its image-side surface S14 being concave. The eighth lens element E8 has negative power. Its object-side surface S15 is convex, and its image-side surface S16 is concave. The filter E9 has an object-side surface S17 and an image-side surface S18. Light from an object passes through surfaces S1 to S18 in sequence and is ultimately imaged on imaging surface S19.

[0109] In this example, the image height ImgH of the camera lens is 8.31 mm, and the total length TTL of the camera lens is 11.50 mm.

[0110] Table 3 shows the basic structural parameters of the camera lens of Example 2, wherein the units of curvature radius, thickness / distance, and focal length are all millimeters (mm).

[0111]

[0112] Table 3

[0113] Table 4 shows the high-order coefficients of each aspheric mirror surface that can be used in Example 2, wherein each aspheric surface shape can be defined by formula (1) given in Example 1 above.

[0114]

[0115]

[0116] Table 4

[0117] Figure 7 The axial chromatic aberration curve of the camera lens of Example 2 is shown, which indicates the deviation of the focal point of light of different wavelengths after passing through the camera lens. Figure 8 The astigmatism curve of the imaging lens of Example 2 is shown, which indicates meridional field curvature and sagittal field curvature. Figure 9 The distortion curve of the camera lens of Example 2 is shown, which represents the distortion magnitude values corresponding to different field angles. Figure 10 The chromatic aberration curve of the camera lens of Example 2 is shown, which represents the deviation of different image heights on the imaging surface after the light passes through the camera lens.

[0118] according to Figures 7 to 10 It can be seen that the camera lens provided in Example 2 can achieve good imaging quality.

[0119] Example 3

[0120] like Figures 11 to 15 As shown, the camera lens of Example 3 of this application is described. Figure 11 A schematic structural diagram of the camera lens of Example 3 is shown.

[0121] like Figure 11 As shown, the camera lens includes, from the object side to the image side, an aperture STO, a first lens E1, an aperture STO, a second lens E2, a third lens E3, a fourth lens E4, a fifth lens E5, a sixth lens E6, a seventh lens E7, an eighth lens E8, a filter E and an imaging surface S19.

[0122] The first lens E1 has positive focal power, with its object-side surface S1 being convex and its image-side surface S2 being concave. The second lens E2 has negative focal power, with its object-side surface S3 being convex and its image-side surface S4 being concave. The third lens E3 has positive focal power, with its object-side surface S5 being convex and its image-side surface S6 being convex. The fourth lens E4 has negative focal power, with its object-side surface S7 being concave and its image-side surface S8 being convex. The fifth lens E5 has positive focal power, with its object-side surface S9 being concave and its image-side surface S10 being convex. The sixth lens E6 has positive focal power, with its object-side surface S11 being convex and its image-side surface S12 being concave. The seventh lens E7 has positive focal power, with its object-side surface S13 being convex and its image-side surface S14 being concave. The eighth lens element E8 has negative power. Its object-side surface S15 is concave, and its image-side surface S16 is concave. The filter E9 has an object-side surface S17 and an image-side surface S18. Light from an object passes through surfaces S1 to S18 in sequence and is ultimately imaged on imaging surface S19.

[0123] In this example, the image height ImgH of the camera lens is 8.31 mm, and the total length TTL of the camera lens is 11.50 mm.

[0124] Table 5 shows the basic structural parameters of the camera lens of Example 3, wherein the units of curvature radius, thickness / distance, and focal length are all millimeters (mm).

[0125]

[0126] Table 5

[0127] Table 6 shows the high-order coefficients of each aspheric mirror surface that can be used in Example 3, wherein each aspheric surface shape can be defined by formula (1) given in Example 1 above.

[0128]

[0129]

[0130] Table 6

[0131] Figure 12 The axial chromatic aberration curve of the camera lens of Example 3 is shown, which indicates the deviation of the focal point of light of different wavelengths after passing through the camera lens. Figure 13 The astigmatism curve of the imaging lens of Example 3 is shown, which indicates meridional field curvature and sagittal field curvature. Figure 14 The distortion curve of the camera lens of Example 3 is shown, which represents the distortion magnitude values corresponding to different field angles. Figure 15The chromatic aberration curve of the camera lens of Example 3 is shown, which represents the deviation of different image heights on the imaging surface after the light passes through the camera lens.

[0132] according to Figures 12 to 15 It can be seen that the camera lens given in Example 3 can achieve good imaging quality.

[0133] Example 4

[0134] like Figures 16 to 20 As shown, the camera lens of Example 4 of the present application is described. Figure 16 A schematic structural diagram of a camera lens of Example 4 is shown.

[0135] like Figure 16 As shown, the camera lens includes, from the object side to the image side, an aperture STO, a first lens E1, an aperture STO, a second lens E2, a third lens E3, a fourth lens E4, a fifth lens E5, a sixth lens E6, a seventh lens E7, an eighth lens E8, a filter E and an imaging surface S19.

[0136] The first lens E1 has positive optical power, with its object-side surface S1 being convex and its image-side surface S2 being concave. The second lens E2 has negative optical power, with its object-side surface S3 being convex and its image-side surface S4 being concave. The third lens E3 has positive optical power, with its object-side surface S5 being convex and its image-side surface S6 being convex. The fourth lens E4 has negative optical power, with its object-side surface S7 being convex and its image-side surface S8 being concave. The fifth lens E5 has positive optical power, with its object-side surface S9 being concave and its image-side surface S10 being convex. The sixth lens E6 has positive optical power, with its object-side surface S11 being convex and its image-side surface S12 being concave. The seventh lens E7 has positive optical power, with its object-side surface S13 being convex and its image-side surface S14 being concave. The eighth lens element E8 has negative power. Its object-side surface S15 is convex, and its image-side surface S16 is concave. The filter E9 has an object-side surface S17 and an image-side surface S18. Light from an object passes through surfaces S1 to S18 in sequence and is ultimately imaged on imaging surface S19.

[0137] In this example, the image height ImgH of the camera lens is 8.31 mm, and the total length TTL of the camera lens is 11.49 mm.

[0138] Table 7 shows the basic structural parameters of the camera lens of Example 4, where the units of curvature radius, thickness / distance, and focal length are all millimeters (mm).

[0139]

[0140] Table 7

[0141] Table 8 shows the high-order coefficients of each aspheric mirror surface that can be used in Example 4, where the surface shape of each aspheric surface can be defined by formula (1) given in Example 1 above.

[0142] Face number A4 A6 A8 A10 A12 A14 A16 S1 -3.5644E-02 -1.5714E-03 -1.2358E-03 -1.0749E-03 -8.0718E-04 -4.5404E-04 -2.4166E-04 S2 -3.0058E-02 -1.1058E-03 -1.4283E-03 -9.0735E-04 -3.1191E-04 2.8292E-05 2.3957E-04 S3 -2.3336E-01 3.0174E-02 -4.4750E-03 4.9734E-04 -2.3291E-04 1.2139E-04 -2.3983E-05 S4 -1.4210E-01 3.8771E-02 -5.3760E-04 1.2374E-03 -1.9557E-04 7.2826E-05 3.4399E-05 S5 -1.1836E-01 -8.8561E-03 5.0022E-03 1.8999E-03 3.4745E-04 -1.8129E-04 9.7097E-05 S6 -5.6170E-02 -1.4184E-02 1.8556E-02 2.9457E-03 3.6824E-03 -1.5623E-03 7.1861E-04 S7 -9.0957E-02 -1.2750E-02 6.1650E-03 -1.3368E-03 4.5544E-03 -3.8389E-04 4.9334E-04 S8 -4.0150E-01 -4.9348E-02 -4.4131E-03 8.8958E-03 5.6342E-04 2.2205E-03 -3.6019E-04 S9 -1.8174E-01 -9.6040E-02 7.5805E-03 7.4083E-06 -2.3489E-03 2.8946E-03 -2.8837E-04 S10 -1.6782E-01 5.2544E-02 1.9032E-02 -1.8497E-02 2.0133E-03 2.6235E-03 8.6154E-06 S11 -2.1945E+00 9.3722E-02 8.7881E-04 1.1517E-02 8.9464E-03 4.2721E-03 -2.2957E-03 S12 -1.1365E+00 -1.1078E-01 7.2895E-02 -1.5118E-02 5.9517E-03 3.1458E-03 -4.2800E-03 S13 -3.5697E+00 6.7210E-01 7.1173E-02 -1.5212E-01 1.4501E-02 1.7868E-02 3.2645E-03 S14 -2.3363E+00 1.0626E-01 1.2674E-01 -7.1624E-02 2.9646E-02 -3.5570E-02 7.2262E-03 S15 -1.7073E+00 1.4989E+00 -9.1266E-01 5.7159E-01 -2.9059E-01 1.3158E-01 -5.3630E-02 S16 -1.0487E+01 2.3939E+00 -1.2490E+00 3.4203E-01 -2.3921E-01 1.3957E-01 -3.4583E-02 Face number A18 A20 A22 A24 A26 A28 A30 S1 -1.1466E-04 -7.9169E-05 -5.9964E-05 -5.1658E-05 -3.3720E-05 -1.7072E-05 0.0000E+00 S2 2.8406E-04 2.8047E-04 2.2067E-04 1.5724E-04 8.0201E-05 3.1196E-05 0.0000E+00 S3 3.5906E-05 -1.6808E-05 1.3298E-06 -2.3037E-07 4.1442E-06 -6.0492E-07 0.0000E+00 S4 5.6540E-06 1.8697E-05 -2.4637E-05 5.4566E-06 -9.7166E-06 1.5898E-06 0.0000E+00 S5 -1.3942E-04 -1.6289E-05 -9.9938E-05 -1.1211E-05 -2.8785E-05 -1.7724E-06 0.0000E+00 S6 -1.2955E-03 2.5181E-04 -3.5423E-04 1.1403E-04 -9.4867E-05 2.6509E-05 0.0000E+00 S7 -1.3600E-03 4.6287E-04 -4.3915E-04 1.6256E-04 -1.2377E-04 8.4004E-05 0.0000E+00 S8 -2.8764E-04 3.4679E-05 -9.9390E-05 7.3730E-05 -6.4084E-05 1.1840E-05 0.0000E+00 S9 8.5166E-04 -6.4051E-05 1.5991E-04 1.4816E-04 5.9209E-05 -6.0787E-06 0.0000E+00 S10 -2.9761E-05 -7.8025E-04 -3.8634E-05 -1.3226E-04 -1.4670E-04 -1.0603E-04 0.0000E+00 S11 -2.5321E-03 -3.9654E-04 -2.0724E-04 8.9959E-04 4.6395E-04 4.7009E-04 0.0000E+00 S12 1.2587E-03 -9.7398E-04 4.9258E-04 1.0414E-03 1.0753E-03 6.7626E-04 0.0000E+00 S13 -2.0669E-03 -4.1092E-03 -7.8831E-04 3.0894E-03 1.8358E-03 -6.9600E-04 7.0012E-05 S14 -7.9076E-03 2.5139E-03 1.4081E-02 1.8519E-03 -1.3944E-02 -1.0980E-02 -1.0956E-03 S15 2.4924E-02 1.1353E-02 -2.0094E-03 -5.4859E-03 5.3697E-03 9.3604E-03 0.0000E+00 S16 2.7466E-02 -1.3116E-02 -1.7304E-02 -5.8791E-03 4.3239E-03 6.1090E-03 -1.5232E-03

[0143] Table 8

[0144] Figure 17 The axial chromatic aberration curve of the camera lens of Example 4 is shown, which indicates the deviation of the focal point of light of different wavelengths after passing through the camera lens. Figure 18 The astigmatism curve of the imaging lens of Example 4 is shown, which indicates meridional field curvature and sagittal field curvature. Figure 19 The distortion curve of the camera lens of Example 4 is shown, which represents the distortion magnitude values corresponding to different field angles. Figure 20 The chromatic aberration curve of the camera lens of Example 4 is shown, which represents the deviation of different image heights on the imaging surface after the light passes through the camera lens.

[0145] according to Figures 17 to 20 It can be seen that the camera lens given in Example 4 can achieve good imaging quality.

[0146] Example 5

[0147] like Figures 21 to 25 As shown, the camera lens of Example 5 of the present application is described. Figure 21 A schematic structural diagram of the camera lens of Example 5 is shown.

[0148] like Figure 21 As shown, the camera lens includes, from the object side to the image side, an aperture STO, a first lens E1, an aperture STO, a second lens E2, a third lens E3, a fourth lens E4, a fifth lens E5, a sixth lens E6, a seventh lens E7, an eighth lens E8, a filter E and an imaging surface S19.

[0149] The first lens E1 has positive focal power, with its object-side surface S1 being convex and its image-side surface S2 being concave. The second lens E2 has negative focal power, with its object-side surface S3 being concave and its image-side surface S4 being concave. The third lens E3 has positive focal power, with its object-side surface S5 being convex and its image-side surface S6 being convex. The fourth lens E4 has negative focal power, with its object-side surface S7 being concave and its image-side surface S8 being concave. The fifth lens E5 has positive focal power, with its object-side surface S9 being concave and its image-side surface S10 being convex. The sixth lens E6 has positive focal power, with its object-side surface S11 being convex and its image-side surface S12 being concave. The seventh lens E7 has positive focal power, with its object-side surface S13 being convex and its image-side surface S14 being concave. The eighth lens element E8 has negative power. Its object-side surface S15 is convex, and its image-side surface S16 is concave. The filter E9 has an object-side surface S17 and an image-side surface S18. Light from an object passes through surfaces S1 to S18 in sequence and is ultimately imaged on imaging surface S19.

[0150] In this example, the image height ImgH of the camera lens is 8.31 mm, and the total length TTL of the camera lens is 11.50 mm.

[0151] Table 9 shows the basic structural parameters of the camera lens of Example 5, where the units of curvature radius, thickness / distance, and focal length are all millimeters (mm).

[0152]

[0153]

[0154] Table 9

[0155] Table 10 shows the high-order coefficients of each aspheric mirror surface that can be used in Example 5, where the surface shape of each aspheric surface can be defined by formula (1) given in Example 1 above.

[0156] Face number A4 A6 A8 A10 A12 A14 A16 S1 -3.5798E-02 -2.2341E-03 -1.6614E-03 -1.0507E-03 -6.2270E-04 -3.6429E-04 -2.6304E-04 S2 -2.7315E-02 -3.2558E-03 -1.9124E-03 -5.0179E-04 -1.3893E-04 -9.6155E-05 9.7364E-05 S3 -2.3763E-01 2.8931E-02 -4.8719E-03 4.5845E-04 1.4857E-04 1.3603E-04 5.2034E-05 S4 -1.4709E-01 4.1255E-02 -5.9040E-04 9.7936E-04 5.0330E-05 -2.2435E-06 6.6351E-05 S5 -1.2158E-01 -9.8841E-03 5.3669E-03 2.1611E-03 2.1230E-04 -1.2472E-04 3.0462E-05 S6 -6.0220E-02 -1.2437E-02 1.9326E-02 3.4034E-03 3.1498E-03 -1.3931E-03 6.4557E-04 S7 -9.5440E-02 -1.4321E-02 5.5438E-03 -1.5413E-03 5.3258E-03 -2.8107E-04 1.5581E-04 S8 -4.1374E-01 -4.8976E-02 -3.6292E-03 9.2760E-03 2.0907E-04 2.2222E-03 -6.5057E-04 S9 -1.9348E-01 -1.0182E-01 7.9475E-03 -1.4210E-04 -3.0542E-03 3.2092E-03 -2.3141E-04 S10 -1.7038E-01 5.6037E-02 1.9567E-02 -2.0087E-02 2.8812E-03 3.0782E-03 -2.2408E-04 S11 -2.2650E+00 9.5380E-02 8.9285E-04 1.1624E-02 1.0449E-02 5.0770E-03 -1.9623E-03 S12 -1.1936E+00 -1.1625E-01 7.3165E-02 -1.8485E-02 5.9488E-03 3.6235E-03 -4.0712E-03 S13 -3.6692E+00 6.8077E-01 6.6609E-02 -1.6739E-01 1.5071E-02 1.8242E-02 5.4260E-03 S14 -2.3726E+00 8.8518E-02 1.5264E-01 -6.3614E-02 3.2442E-02 -4.1306E-02 2.3224E-03 S15 -1.4951E+00 1.5941E+00 -9.5811E-01 5.9974E-01 -3.1289E-01 1.4774E-01 -6.0270E-02 S16 -1.1084E+01 2.4900E+00 -1.4188E+00 3.3126E-01 -2.2530E-01 1.8569E-01 -2.9422E-02 Face number A18 A20 A22 A24 A26 A28 A30 S1 -1.9210E-04 -1.3457E-04 -7.4389E-05 -3.7384E-05 -1.5849E-05 -5.9794E-06 0.0000E+00 S2 2.9181E-04 3.7610E-04 2.9487E-04 1.6292E-04 5.8155E-05 1.6168E-05 0.0000E+00 S3 -1.4028E-05 -4.4682E-05 -3.7728E-05 -2.8138E-05 -1.8427E-05 -1.2282E-05 0.0000E+00 S4 -7.9618E-06 1.3837E-05 -1.8925E-05 3.9825E-07 -2.7862E-06 -2.7765E-06 0.0000E+00 S5 -7.5531E-05 -2.7335E-05 -6.2118E-05 -1.6293E-05 -1.3187E-05 -7.4054E-06 0.0000E+00 S6 -1.3923E-03 3.6975E-04 -3.7263E-04 1.6809E-04 -1.1611E-04 -4.3310E-06 0.0000E+00 S7 -1.4201E-03 5.6946E-04 -5.1699E-04 2.1605E-04 -1.7633E-04 1.0173E-04 0.0000E+00 S8 -2.8908E-05 1.0868E-05 -5.5107E-05 9.3778E-05 -4.7927E-05 3.8350E-05 0.0000E+00 S9 1.1478E-03 4.5299E-06 1.1867E-04 1.5173E-04 -7.3225E-06 2.2023E-07 0.0000E+00 S10 -3.6282E-04 -1.0139E-03 -3.8725E-05 -5.3570E-05 -1.4307E-04 -4.9847E-05 0.0000E+00 S11 -2.7950E-03 -3.5869E-04 -1.8042E-04 1.0392E-03 8.0887E-04 4.1185E-04 0.0000E+00 S12 1.3200E-03 -1.0159E-03 5.9834E-04 1.2951E-03 1.2742E-03 3.7255E-04 0.0000E+00 S13 -9.4971E-04 -2.5998E-03 -5.5366E-04 1.2813E-03 7.2908E-04 -1.3776E-03 -3.4529E-04 S14 -9.9301E-03 1.0530E-02 1.6461E-02 -7.2938E-04 -1.3050E-02 -1.0427E-02 -1.3802E-03 S15 3.3493E-02 6.5572E-03 -6.3152E-03 -5.4738E-03 3.2750E-03 4.9087E-03 0.0000E+00 S16 2.4556E-02 -3.5121E-02 -3.1503E-02 -6.6295E-03 1.0654E-02 8.5297E-03 -1.6624E-04

[0157] Table 10

[0158] Figure 22 The axial chromatic aberration curve of the camera lens of Example 5 is shown, which indicates the deviation of the focal point of light of different wavelengths after passing through the camera lens. Figure 23 The astigmatism curve of the imaging lens of Example 5 is shown, which indicates meridional field curvature and sagittal field curvature. Figure 24 The distortion curve of the camera lens of Example 5 is shown, which represents the distortion magnitude values corresponding to different field angles. Figure 25The chromatic aberration curve of the camera lens of Example 5 is shown, which represents the deviation of different image heights on the imaging surface after the light passes through the camera lens.

[0159] according to Figures 22 to 25 It can be seen that the camera lens given in Example 5 can achieve good imaging quality.

[0160] Example 6

[0161] like Figures 26 to 30 As shown, the camera lens of Example 6 of the present application is described. Figure 26 A schematic structural diagram of the camera lens of Example 6 is shown.

[0162] like Figure 26 As shown, the camera lens includes, from the object side to the image side, an aperture STO, a first lens E1, an aperture STO, a second lens E2, a third lens E3, a fourth lens E4, a fifth lens E5, a sixth lens E6, a seventh lens E7, an eighth lens E8, a filter E and an imaging surface S19.

[0163] The first lens E1 has positive focal power, with its object-side surface S1 being convex and its image-side surface S2 being concave. The second lens E2 has negative focal power, with its object-side surface S3 being convex and its image-side surface S4 being concave. The third lens E3 has positive focal power, with its object-side surface S5 being convex and its image-side surface S6 being convex. The fourth lens E4 has negative focal power, with its object-side surface S7 being concave and its image-side surface S8 being concave. The fifth lens E5 has positive focal power, with its object-side surface S9 being convex and its image-side surface S10 being concave. The sixth lens E6 has positive focal power, with its object-side surface S11 being convex and its image-side surface S12 being concave. The seventh lens E7 has positive focal power, with its object-side surface S13 being convex and its image-side surface S14 being concave. The eighth lens element E8 has negative power. Its object-side surface S15 is convex, and its image-side surface S16 is concave. The filter E9 has an object-side surface S17 and an image-side surface S18. Light from an object passes through surfaces S1 to S18 in sequence and is ultimately imaged on imaging surface S19.

[0164] In this example, the image height ImgH of the camera lens is 8.31 mm, and the total length TTL of the camera lens is 11.50 mm.

[0165] Table 11 shows the basic structural parameters of the camera lens of Example 6, where the units of curvature radius, thickness / distance, and focal length are all millimeters (mm).

[0166]

[0167]

[0168] Table 11

[0169] Table 12 shows the high-order coefficients of each aspheric mirror surface that can be used in Example 6, where each aspheric surface shape can be defined by formula (1) given in Example 1 above.

[0170]

[0171]

[0172] Table 12

[0173] Figure 27 The axial chromatic aberration curve of the camera lens of Example 6 is shown, which indicates the deviation of the focal point of light of different wavelengths after passing through the camera lens. Figure 28 The astigmatism curve of the imaging lens of Example 6 is shown, which indicates meridional field curvature and sagittal field curvature. Figure 29 The distortion curve of the camera lens of Example 6 is shown, which represents the distortion magnitude values corresponding to different field angles. Figure 30 The chromatic aberration curve of the camera lens of Example 6 is shown, which represents the deviation of different image heights on the imaging surface after the light passes through the camera lens.

[0174] according to Figures 27 to 30 It can be seen that the camera lens given in Example 6 can achieve good imaging quality.

[0175] Example 7

[0176] like Figures 31 to 35 As shown, the camera lens of Example 7 of this application is described. Figure 31 A schematic structural diagram of the camera lens of Example 7 is shown.

[0177] like Figure 31 As shown, the camera lens includes, from the object side to the image side, an aperture STO, a first lens E1, an aperture STO, a second lens E2, a third lens E3, a fourth lens E4, a fifth lens E5, a sixth lens E6, a seventh lens E7, an eighth lens E8, a filter E and an imaging surface S19.

[0178] The first lens E1 has positive focal power, with its object-side surface S1 being convex and its image-side surface S2 being concave. The second lens E2 has negative focal power, with its object-side surface S3 being convex and its image-side surface S4 being concave. The third lens E3 has positive focal power, with its object-side surface S5 being convex and its image-side surface S6 being convex. The fourth lens E4 has negative focal power, with its object-side surface S7 being concave and its image-side surface S8 being convex. The fifth lens E5 has positive focal power, with its object-side surface S9 being concave and its image-side surface S10 being convex. The sixth lens E6 has positive focal power, with its object-side surface S11 being convex and its image-side surface S12 being concave. The seventh lens E7 has positive focal power, with its object-side surface S13 being convex and its image-side surface S14 being concave. The eighth lens element E8 has negative power. Its object-side surface S15 is convex, and its image-side surface S16 is concave. The filter E9 has an object-side surface S17 and an image-side surface S18. Light from an object passes through surfaces S1 to S18 in sequence and is ultimately imaged on imaging surface S19.

[0179] In this example, the image height ImgH of the camera lens is 8.31 mm, and the total length TTL of the camera lens is 11.50 mm.

[0180] Table 13 shows the basic structural parameters of the camera lens of Example 7, where the units of curvature radius, thickness / distance, and focal length are all millimeters (mm).

[0181]

[0182]

[0183] Table 13

[0184] Table 14 shows the high-order coefficients of each aspheric mirror surface that can be used in Example 7, where each aspheric surface shape can be defined by formula (1) given in Example 1 above.

[0185]

[0186]

[0187] Table 14

[0188] Figure 32 The axial chromatic aberration curve of the camera lens of Example 7 is shown, which indicates the deviation of the focal point of light of different wavelengths after passing through the camera lens. Figure 33 The astigmatism curve of the imaging lens of Example 7 is shown, which indicates meridional field curvature and sagittal field curvature. Figure 34The distortion curve of the camera lens of Example 7 is shown, which represents the distortion magnitude values corresponding to different field angles. Figure 35 The chromatic aberration curve of the camera lens of Example 7 is shown, which represents the deviation of different image heights on the imaging surface after the light passes through the camera lens.

[0189] according to Figures 32 to 35 It can be seen that the camera lens given in Example 7 can achieve good imaging quality.

[0190] Example 8

[0191] like Figures 36 to 40 As shown, the camera lens of Example 8 of the present application is described. Figure 36 A schematic structural diagram of the camera lens of Example 8 is shown.

[0192] like Figure 36 As shown, the camera lens includes, from the object side to the image side, an aperture STO, a first lens E1, an aperture STO, a second lens E2, a third lens E3, a fourth lens E4, a fifth lens E5, a sixth lens E6, a seventh lens E7, an eighth lens E8, a filter E and an imaging surface S19.

[0193] The first lens E1 has positive focal power, with its object-side surface S1 being convex and its image-side surface S2 being concave. The second lens E2 has negative focal power, with its object-side surface S3 being concave and its image-side surface S4 being concave. The third lens E3 has positive focal power, with its object-side surface S5 being concave and its image-side surface S6 being convex. The fourth lens E4 has negative focal power, with its object-side surface S7 being concave and its image-side surface S8 being convex. The fifth lens E5 has positive focal power, with its object-side surface S9 being concave and its image-side surface S10 being convex. The sixth lens E6 has positive focal power, with its object-side surface S11 being convex and its image-side surface S12 being concave. The seventh lens E7 has positive focal power, with its object-side surface S13 being convex and its image-side surface S14 being concave. The eighth lens element E8 has negative power. Its object-side surface S15 is convex, and its image-side surface S16 is concave. The filter E9 has an object-side surface S17 and an image-side surface S18. Light from an object passes through surfaces S1 to S18 in sequence and is ultimately imaged on imaging surface S19.

[0194] In this example, the image height ImgH of the camera lens is 8.31 mm, and the total length TTL of the camera lens is 11.49 mm.

[0195] Table 15 shows the basic structural parameters of the camera lens of Example 8, where the units of curvature radius, thickness / distance, and focal length are all millimeters (mm).

[0196]

[0197]

[0198] Table 15

[0199] Table 16 shows the high-order coefficients of each aspheric mirror surface that can be used in Example 8, where each aspheric surface shape can be defined by formula (1) given in Example 1 above.

[0200]

[0201]

[0202] Table 16

[0203] Figure 37 The axial chromatic aberration curve of the camera lens of Example 8 is shown, which indicates the deviation of the focal point of light of different wavelengths after passing through the camera lens. Figure 38 The astigmatism curve of the imaging lens of Example 8 is shown, which indicates meridional field curvature and sagittal field curvature. Figure 39 The distortion curve of the camera lens of Example 8 is shown, which represents the distortion magnitude values corresponding to different field angles. Figure 40 The chromatic aberration curve of the camera lens of Example 8 is shown, which represents the deviation of different image heights on the imaging surface after the light passes through the camera lens.

[0204] according to Figures 37 to 40 It can be seen that the camera lens given in Example 8 can achieve good imaging quality.

[0205] In summary, Examples 1 to 8 respectively satisfy the relationships shown in Table 17.

[0206] Conditional / Example 1 2 3 4 5 6 7 8 (R1+R2) / (f1-f) 4.41 3.34 3.41 6.39 8.40 6.10 5.07 7.76 (f2-f) / R4 -5.20 -5.05 -4.97 -2.52 -1.93 -2.72 -2.60 -1.61 f3*T23 / (R6*T23) -1.74 -1.62 -1.63 -0.41 -0.50 -0.55 -0.48 -2.16 f6 / R12+R9 / R10 2.54 2.75 2.75 5.26 4.95 4.88 8.27 6.38 |R11*T67 / (R5*T34)| 5.18 10.94 9.96 6.49 14.76 4.01 3.94 12.00 R13 / R16*(f / f8) -5.39 -4.01 -4.12 -1.81 -1.88 -2.03 -2.29 -1.43 IhD 8.31 8.31 8.31 8.31 8.31 8.31 8.31 8.31 T67 / (CT6+CT7) 1.84 2.12 2.12 1.25 1.22 1.24 1.37 1.59 CT3 / (CT2+T23) 1.66 1.45 1.38 2.18 2.03 1.76 1.05 2.58 T78 / T45 1.09 1.03 1.04 2.83 3.02 2.99 3.14 5.55

[0207] Tables 17 and 18 show the effective focal lengths f1 to f8 of the respective lenses of the imaging lenses of Examples 1 to 8.

[0208]

[0209]

[0210] Table 18

[0211] The present application also provides an imaging device, wherein the electronic photosensitive element thereof may be a charge coupled device (CCD) or a complementary metal oxide semiconductor (CMOS). The imaging device may be a standalone imaging device such as a digital camera, or an imaging module integrated into a mobile electronic device such as a mobile phone. The imaging device is equipped with the camera lens described above.

[0212] Obviously, the embodiments described above are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts should fall within the scope of protection of the present invention.

[0213] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present application. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprise" and / or "include" are used in this specification, they indicate the presence of features, steps, tasks, devices, components and / or combinations thereof.

[0214] It should be noted that the terms "first," "second," and the like in the specification and claims of this application and the accompanying drawings are used to distinguish similar objects and are not necessarily used to describe a specific order or precedence. It should be understood that the terms used in this manner are interchangeable where appropriate, so that the embodiments of the present application described herein can be implemented in an order other than that illustrated or described herein.

[0215] The foregoing description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. Those skilled in the art will readily appreciate that various modifications and variations of the present invention are possible. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of the present invention are intended to be within the scope of protection of the present invention.

Claims

1. A camera lens, characterized in that: The camera lens is composed of eight lenses, and the camera lens includes: a first lens having positive refractive power, wherein the object-side surface of the first lens is convex and the image-side surface of the first lens is concave; a second lens having negative optical power, wherein the image-side surface of the second lens is concave; a third lens having positive refractive power, wherein the image-side surface of the third lens is convex; a fourth lens having optical power; a fifth lens having positive refractive power; a sixth lens having positive refractive power, wherein the object-side surface of the sixth lens is convex and the image-side surface of the sixth lens is concave; a seventh lens having positive refractive power, wherein the object-side surface of the seventh lens is convex and the image-side surface of the seventh lens is concave; an eighth lens element having negative optical power, wherein the image-side surface of the eighth lens element is concave; The center thickness CT6 of the sixth lens on the optical axis of the camera lens, the center thickness CT7 of the seventh lens on the optical axis, and the air gap T67 between the sixth lens and the seventh lens on the optical axis satisfy the following conditions: 1.22≤T67 / (CT6+CT7)≤2.12; An air interval T45 between the fourth lens and the fifth lens on the optical axis of the imaging lens and an air interval T78 between the seventh lens and the eighth lens on the optical axis satisfy the following: 1.0<T78 / T45≤5.

55.

2. The imaging lens according to claim 1, wherein: The curvature radius R1 of the object side surface of the first lens, the curvature radius R2 of the image side surface of the first lens, the effective focal length f1 of the first lens, and the effective focal length f of the camera lens satisfy: 3.34≤(R1+R2) / (f1-f)≤8.

40.

3. The camera lens according to claim 1, wherein: The effective focal length f2 of the second lens, the effective focal length f of the camera lens, and the curvature radius R4 of the image side surface of the second lens satisfy the following relationship: -5.5<(f2-f) / R4<-1.

5.

4. The imaging lens according to claim 1, wherein: The effective focal length f3 of the third lens, the air gap T23 between the second lens and the third lens on the optical axis of the camera lens, and the curvature radius R6 of the image side surface of the third lens satisfy: -2.16≤f3*T23 / (R6*T23)≤-0.

41.

5. The imaging lens according to claim 1, wherein: The effective focal length f6 of the sixth lens, the curvature radius R9 of the object side surface of the fifth lens, the curvature radius R10 of the image side surface of the fifth lens, and the curvature radius R12 of the image side surface of the sixth lens satisfy the following relationship: 2.5<f6 / R12+R9 / R10≤8.

27.

6. The camera lens according to claim 1, wherein: The curvature radius R5 of the object side surface of the third lens, the curvature radius R11 of the object side surface of the sixth lens, the air gap T34 between the third lens and the fourth lens on the optical axis of the camera lens, and the air gap T67 between the sixth lens and the seventh lens on the optical axis satisfy the following: 3.94≤|R11*T67 / (R5*T34)|≤14.

76.

7. The imaging lens according to claim 1, wherein: The curvature radius R13 of the object side surface of the seventh lens, the curvature radius R16 of the image side surface of the eighth lens, the effective focal length f of the camera lens and the effective focal length f8 of the eighth lens satisfy the following relationship: -5.39≤R13 / R16*(f / f8)≤-1.

43.

8. The imaging lens according to claim 1, wherein: The center thickness CT2 of the second lens on the optical axis of the camera lens, the center thickness CT3 of the third lens on the optical axis, and the air interval T23 between the second lens and the third lens on the optical axis satisfy the following: 1.05≤CT3 / (CT2+T23)≤2.

58.

9. The imaging lens according to claim 1, wherein: Half of the diagonal length ImgH of the effective pixel area on the imaging surface of the camera lens satisfies: ImgH>8.0mm.

Images