Optical imaging lens

Abstract

The present application discloses an optical imaging lens, which sequentially includes, from the object side to the image side along the optical axis: a first lens having a focal power; a second lens having a focal power; a third lens having a negative focal power; a fourth lens having a focal power; a fifth lens having a positive focal power; a sixth lens having a negative focal power, the curvature radii of its object side and image side being negative; a seventh lens having a focal power; and an eighth lens having a focal power, the curvature radii of its object side and image side being positive; the total effective focal length f of the optical imaging lens and half of the maximum field of view angle Semi-FOV of the optical imaging lens satisfy: tan(Semi-FOV)×f>5 mm, the on-axis distance TTL from the object side of the first lens to the imaging surface of the optical imaging lens and half of the diagonal length ImgH of the effective pixel region on the imaging surface of the optical imaging lens satisfy: TTL / ImgH<1.4, and the total effective focal length f of the optical imaging lens, the curvature radius R11 of the object side of the sixth lens and the curvature radius R12 of the image side of the sixth lens satisfy: -3<(R11+R12) / f<0.

Description

Technical Field

[0001] The present application relates to the field of optical devices, and particularly to an eight-element optical imaging lens. Background Art

[0002] With the rapid development of portable devices such as smart phones, more new requirements are put forward for the imaging function of portable devices such as smart phones. For example, through the optical design of the optical imaging lens, the optical imaging lens of portable devices such as smart phones can meet the requirements of a large image plane and a large field of view angle.

[0003] In the actual design process, in order to make the eight-element optical imaging lens meet the requirements of a large image plane and a large field of view angle, the eight-element optical imaging lens often has a large volume, and it is impossible to ensure the ultra-thinness of the eight-element optical imaging lens, thus affecting the competitiveness of the eight-element optical imaging lens. Summary of the Invention

[0004] The present application provides an optical imaging lens that can at least solve or partially solve at least one problem or other problems existing in the prior art.

[0005] One aspect of the present application provides such an optical imaging lens, which sequentially includes, along the optical axis from the object side to the image side: a first lens with a focal power; a second lens with a focal power; a third lens with a negative focal power; a fourth lens with a focal power; a fifth lens with a positive focal power; a sixth lens with a negative focal power, the curvature radii of both the object side and the image side are negative; a seventh lens with a focal power; and an eighth lens with a focal power, the curvature radii of both the object side and the image side are positive; the number of lenses with a focal power in the optical imaging lens is eight, wherein, the total effective focal length f of the optical imaging lens and half of the maximum field of view angle Semi-FOV of the optical imaging lens satisfy: tan(Semi-FOV)×f>5mm, the on-axis distance TTL from the object side of the first lens to the imaging plane of the optical imaging lens and half of the diagonal length ImgH of the effective pixel area on the imaging plane of the optical imaging lens satisfy: TTL / ImgH<1.4, and the total effective focal length f of the optical imaging lens, the curvature radius R11 of the object side of the sixth lens and the curvature radius R12 of the image side of the sixth lens satisfy: -3<(R11+R12) / f<0.

[0006] According to an exemplary embodiment of the present application, the fourth lens has a positive focal power, and the effective focal length f4 of the fourth lens and the total effective focal length f of the optical imaging lens satisfy: 1.5<f4 / f<3.5.

[0007] According to an exemplary embodiment of the present application, the radius of curvature R15 of the object side surface of the eighth lens and the radius of curvature R16 of the image side surface of the eighth lens satisfy: 2 < (R15 + R16) / (R15 - R16) < 7, 0.5 < R15 / R16 < 3.3.

[0008] According to an exemplary embodiment of the present application, the central thickness CT2 of the second lens on the optical axis and the central thickness CT4 of the fourth lens on the optical axis satisfy: 2.14 ≤ CT4 / CT2 < 5.

[0009] According to an exemplary embodiment of the present application, the radius of curvature R11 of the object side surface of the sixth lens, the radius of curvature R12 of the image side surface of the sixth lens, and the effective focal length f6 of the sixth lens satisfy: 0 < (R11 + R12) / f6 < 2.

[0010] According to an exemplary embodiment of the present application, the central thickness CTg on the optical axis of the lens with an Abbe number less than 20 among the first lens to the eighth lens and the central thickness CT4 of the fourth lens on the optical axis satisfy: 0 < CTg / CT4 < 1.

[0011] According to an exemplary embodiment of the present application, the on-axis distance BFL from the image side surface of the eighth lens to the imaging surface of the optical imaging lens and the air gap T78 between the seventh lens and the eighth lens on the optical axis satisfy: 0 < BFL / T78 ≤ 4.28.

[0012] According to an exemplary embodiment of the present application, the Abbe number V1 of the first lens, the Abbe number V2 of the second lens, the Abbe number V6 of the sixth lens, and the Abbe number V7 of the seventh lens satisfy: V1 + V2 > V6 + V7.

[0013] According to an exemplary embodiment of the present application, the effective focal length f1 of the first lens, the radius of curvature R1 of the object side surface of the first lens, the radius of curvature R2 of the image side surface of the first lens, the effective focal length f2 of the second lens, the radius of curvature R3 of the object side surface of the second lens, and the radius of curvature R4 of the image side surface of the second lens satisfy: 0.5 < (R2 - R1) / f1 + (R4 + R3) / f2 < 3.

[0014] According to an exemplary embodiment of the present application, the central thickness CT7 of the seventh lens on the optical axis and the edge thickness ET7 of the seventh lens satisfy: 0.5 < CT7 / ET7 < 2.1.

[0015] According to an exemplary embodiment of the present application, the on-axis distance SAG11 from the intersection of the object side surface of the first lens and the optical axis to the vertex of the effective semi-aperture of the object side surface of the first lens and the effective semi-aperture DT11 of the object side surface of the first lens satisfy: 0 < SAG11 / DT11 < 1.

[0016] According to an exemplary embodiment of the present application, the effective focal length f3 of the third lens, the effective focal length f4 of the fourth lens, the effective focal length f5 of the fifth lens, and the effective focal length f6 of the sixth lens satisfy: -2 < f6 / f5 + f4 / f3 < 0.

[0017] According to an exemplary embodiment of the present application, the air gap T34 between the third lens and the fourth lens on the optical axis and the air gap T45 between the fourth lens and the fifth lens on the optical axis satisfy: 0 < T34 / T45 < 0.8; and the air gap T56 between the fifth lens and the sixth lens on the optical axis and the air gap T67 between the sixth lens and the seventh lens on the optical axis satisfy: 0 < T67 / T56 < 0.8.

[0018] According to an exemplary embodiment of the present application, the first lens has a positive optical power, and the curvature radii of its object side and image side are both positive; the second lens has a positive or negative optical power, and the curvature radii of its object side and image side are both positive.

[0019] While restricting the total effective focal length of the optical imaging lens and half of the maximum field of view angle of the optical imaging lens, the present application constrains the ratio of the on-axis distance from the object side of the first lens to the imaging surface of the optical imaging lens to half of the diagonal length of the effective pixel region on the imaging surface of the optical imaging lens within a certain range, which is beneficial for the optical imaging lens to achieve a larger imaging height and a shorter optical total length while meeting the large field of view angle, and ensures that the optical imaging lens is ultrathin while meeting the requirements of a large image surface and a large field of view angle; at the same time, by constraining the curvature radii and the effective focal length of the object side and image side of the sixth lens, the sixth lens can effectively correct the field curvature of the optical imaging lens, thereby improving the imaging quality of the optical imaging lens. Description of the Drawings

[0020] Other features, objects, and advantages of the present application will become more apparent by reading the detailed description of the non-limiting embodiments with reference to the following drawings:

[0021] Figure 1 Shows a schematic structural diagram of an optical imaging lens according to Embodiment 1 of the present application;

[0022] Figures 2A to 2D Respectively show the axial chromatic aberration curve, astigmatism curve, distortion curve, and lateral chromatic aberration curve of the optical imaging lens according to Embodiment 1 of the present application;

[0023] Figure 3 Shows a schematic structural diagram of an optical imaging lens according to Embodiment 2 of the present application;

[0024] Figures 4A to 4DThe axial chromatic aberration curve, astigmatism curve, distortion curve, and lateral chromatic aberration curve of the optical imaging lens according to Embodiment 2 of the present application are respectively shown;

[0025] Figure 5 The schematic structural diagram of the optical imaging lens according to Embodiment 3 of the present application is shown;

[0026] Figures 6A to 6D The axial chromatic aberration curve, astigmatism curve, distortion curve, and lateral chromatic aberration curve of the optical imaging lens according to Embodiment 3 of the present application are respectively shown;

[0027] Figure 7 The schematic structural diagram of the optical imaging lens according to Embodiment 4 of the present application is shown;

[0028] Figures 8A to 8D The axial chromatic aberration curve, astigmatism curve, distortion curve, and lateral chromatic aberration curve of the optical imaging lens according to Embodiment 4 of the present application are respectively shown;

[0029] Figure 9 The schematic structural diagram of the optical imaging lens according to Embodiment 5 of the present application is shown;

[0030] Figures 10A to 10D The axial chromatic aberration curve, astigmatism curve, distortion curve, and lateral chromatic aberration curve of the optical imaging lens according to Embodiment 5 of the present application are respectively shown;

[0031] Figure 11 The schematic structural diagram of the optical imaging lens according to Embodiment 6 of the present application is shown;

[0032] Figures 12A to 12D The axial chromatic aberration curve, astigmatism curve, lateral chromatic aberration curve, and distortion curve of the optical imaging lens according to Embodiment 6 of the present application are respectively shown;

[0033] Figure 13 The schematic structural diagram of the optical imaging lens according to Embodiment 7 of the present application is shown; and

[0034] Figures 14A to 14D The axial chromatic aberration curve, astigmatism curve, distortion curve, and lateral chromatic aberration curve of the optical imaging lens according to Embodiment 7 of the present application are respectively shown. Detailed Embodiments

[0035] To better understand the present application, more detailed descriptions of various aspects of the present application will be made with reference to the accompanying drawings. It should be understood that these detailed descriptions are only descriptions of the exemplary embodiments of the present application and do not limit the scope of the present application in any way. Throughout the specification, the same reference numerals refer to the same elements.

[0036] It should be noted that in this specification, the expressions such as first, second, third, etc. are only used to distinguish one feature from another, and do not represent 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.

[0037] In the drawings, for ease of explanation, the thickness, size, and shape of the lens have been slightly exaggerated. Specifically, the spherical or aspherical shapes shown in the drawings are shown by way of example. That is, the spherical or aspherical shapes are not limited to the spherical or aspherical shapes shown in the drawings. The drawings are only examples and are not drawn to an exact scale.

[0038] In this document, the paraxial region refers to the region near the optical axis. If the lens surface is convex and the position of the convex surface is not defined, it means that the lens surface is convex at least in the paraxial region; if the lens surface is concave and the position of the concave surface is not defined, it means that the lens surface is concave at least in the paraxial region. The surface of each lens closest to the object being photographed is called the object side surface of the lens, and the surface of each lens closest to the imaging surface is called the image side surface of the lens.

[0039] It should also be understood that the terms "comprises", "comprising", "has", "including", and / or "including having", when used in this specification, indicate the presence of the stated features, elements, and / or components, but do not exclude the presence or addition of one or more other features, elements, components, and / or combinations thereof.

[0040] Unless otherwise defined, all terms used herein (including technical and scientific terms) have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. It should also be understood that terms (such as those defined in a common dictionary) should be interpreted as having a meaning consistent with their meaning in the context of the relevant art, and will not be interpreted in an idealized or overly formal sense unless expressly so defined herein.

[0041] It should be noted that, without conflict, the embodiments and features in the embodiments of this application may be combined with each other. The following will refer to the drawings and combine with the embodiments to detail this application.

[0042] The following details the features, principles, and other aspects of this application.

[0043] An optical imaging lens according to an exemplary embodiment of the present application may include a first lens having a focal power, a second lens having a focal power, a third lens having a negative focal power, a fourth lens having a focal power, a fifth lens having a positive focal power, a sixth lens having a negative focal power, a seventh lens having a focal power, and an eighth lens having a focal power. These eight lenses are arranged in sequence from the object side to the image side along the optical axis. An air gap may be provided between any two adjacent lenses among the first lens to the eighth lens. The curvature radii of the object side and the image side of the sixth lens are both negative values. The curvature radii of the object side and the image side of the eighth lens are both positive values.

[0044] Wherein, the total effective focal length f of the optical imaging lens and half of the maximum field of view angle Semi-FOV of the optical imaging lens may satisfy: tan(Semi-FOV)×f>5mm; the on-axis distance TTL from the object side of the first lens to the imaging surface of the optical imaging lens and half of the diagonal length ImgH of the effective pixel region on the imaging surface of the optical imaging lens may satisfy: TTL / ImgH<1.4; and the total effective focal length f of the optical imaging lens, the curvature radius R11 of the object side of the sixth lens and the curvature radius R12 of the image side of the sixth lens may satisfy: -3<(R11+R12) / f<0. In an example, 5.5mm<tan(Semi-FOV)×f<7.5mm, 1.0<TTL / ImgH<1.3, -2<(R11+R12) / f<-1. While restricting the total effective focal length of the optical imaging lens and half of the maximum field of view angle of the optical imaging lens, constraining the ratio of the on-axis distance from the object side of the first lens to the imaging surface of the optical imaging lens to half of the diagonal length of the effective pixel region on the imaging surface of the optical imaging lens within a certain range is beneficial for the optical imaging lens to achieve a larger imaging height and a shorter optical total length while satisfying a large field of view angle, ensuring that the optical imaging lens is thinned while meeting the requirements of a large image surface and a large field of view angle; at the same time, the curvature radii of the object side and the image side of the sixth lens and the effective focal length are also constrained, enabling the sixth lens to effectively correct the field curvature of the optical imaging lens, thereby improving the imaging quality of the optical imaging lens.

[0045] In an exemplary embodiment, the first lens may have a positive focal power, and the curvature radii of its object side and image side are both positive values; the second lens may have a positive focal power or a negative focal power, and the curvature radii of its object side and image side are both positive values. Reasonably controlling the focal power and surface shape of the first lens and the second lens is beneficial for improving the field curvature and distortion of the optical imaging lens, enhancing the light converging ability of the optical imaging lens, and effectively balancing the axial aberration of the optical imaging lens.

[0046] In an exemplary embodiment, the fourth lens may have a positive optical power, and the ratio of the effective focal length f4 of the fourth lens to the total effective focal length f of the optical imaging lens may satisfy: 1.5 < f4 / f < 3.5. By constraining the ratio of the effective focal length of the fourth lens to the total effective focal length of the optical imaging lens within a reasonable range, the optical power of the fourth lens can be reasonably set, avoiding excessive deflection of light rays at the fourth lens, and enhancing the ability of the optical imaging lens to correct field curvature.

[0047] In an exemplary embodiment, the radius of curvature R15 of the object side surface of the eighth lens and the radius of curvature R16 of the image side surface of the eighth lens may satisfy: 2 < (R15 + R16) / (R15 - R16) < 7, 0.5 < R15 / R16 < 3.3. By reasonably controlling the mutual relationship between the radius of curvature of the object side surface and the radius of curvature of the image side surface of the eighth lens, the ratio range of the radius of curvature of the object side surface and the radius of curvature of the image side surface of the eighth lens can be constrained, ensuring that the eighth lens has an appropriate optical power, while reducing the angle between the chief ray and the optical axis when incident on the image plane, and enhancing the illuminance of the image plane.

[0048] In an exemplary embodiment, the central thickness CT2 of the second lens on the optical axis and the central thickness CT4 of the fourth lens on the optical axis may satisfy: 2.14 ≤ CT4 / CT2 < 5. By constraining the ratio of the central thickness of the fourth lens on the optical axis to the central thickness of the second lens on the optical axis within a certain range, it is beneficial to improve the assembly stability of the lens and the consistency of mass production, thereby improving the production yield of the optical imaging lens.

[0049] In an exemplary embodiment, the radius of curvature R11 of the object side surface of the sixth lens, the radius of curvature R12 of the image side surface of the sixth lens, and the effective focal length f6 of the sixth lens may satisfy: 0 < (R11 + R12) / f6 < 2. By reasonably controlling the mutual relationship between the radius of curvature of the object side surface and the radius of curvature of the image side surface of the sixth lens and the effective focal length of the sixth lens, it is beneficial to control the incident angle of off-axis field light rays on the imaging plane and enhance the matching with the photosensitive element and the color filter.

[0050] In an exemplary embodiment, the central thickness CTg of the lens with an Abbe number less than 20 among the first lens to the eighth lens on the optical axis and the central thickness CT4 of the fourth lens on the optical axis may satisfy: 0 < CTg / CT4 < 1. In one example, the Abbe numbers of the third lens and the fifth lens are both less than 20. By reasonably controlling the mutual relationship between the central thickness of the lens with an Abbe number less than 20 on the optical axis and the central thickness of the fourth lens on the optical axis, the dispersion ability of the optical imaging lens can be reasonably distributed, effectively correcting the axial chromatic aberration and lateral chromatic aberration of the optical imaging lens.

[0051] In an exemplary embodiment, the on-axis distance BFL from the image side surface of the eighth lens to the imaging surface of the optical imaging lens and the air gap T78 between the seventh lens and the eighth lens on the optical axis may satisfy: 0 < BFL / T78 ≤ 4.28. By constraining the ratio of the on-axis distance from the image side surface of the eighth lens to the imaging surface of the optical imaging lens to the air gap between the seventh lens and the eighth lens on the optical axis within a certain range, it is beneficial to reasonably allocate the air gap between the seventh lens and the eighth lens on the optical axis, avoid interference at the edges of the seventh lens and the eighth lens, and reduce the assembly difficulty of the lenses.

[0052] In an exemplary embodiment, the Abbe number V1 of the first lens, the Abbe number V2 of the second lens, the Abbe number V6 of the sixth lens, and the Abbe number V7 of the seventh lens may satisfy: V1 + V2 > V6 + V7. Reasonably controlling the relationship between the Abbe numbers of the first lens, the second lens, the sixth lens, and the seventh lens can enable a reasonable distribution of the chromatic dispersion ability of the optical imaging lens, facilitate the correction of axial chromatic aberration and magnification chromatic aberration of the optical imaging lens, and at the same time be beneficial to the molding process of the lenses and improve the production yield of the optical imaging lens.

[0053] In an exemplary embodiment, the effective focal length f1 of the first lens, 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 f2 of the second lens, the curvature radius R3 of the object side surface of the second lens, and the curvature radius R4 of the image side surface of the second lens may satisfy: 0.5 < (R2 - R1) / f1 + (R4 + R3) / f2 < 3. Reasonably controlling the mutual relationship between the effective focal length of the first lens, the curvature radii of the object side surface and the image side surface of the first lens, the effective focal length of the second lens, and the curvature radii of the object side surface and the image side surface of the second lens is beneficial to balancing the aberration of the optical imaging lens, avoiding too large a deflection angle of light, and at the same time enhancing the ability of the optical imaging lens to correct field curvature.

[0054] In an exemplary embodiment, the central thickness CT7 of the seventh lens on the optical axis and the edge thickness ET7 of the seventh lens may satisfy: 0.5 < CT7 / ET7 < 2.1. By constraining the ratio of the central thickness of the seventh lens on the optical axis to the edge thickness of the seventh lens within a certain range, it is beneficial to reasonably allocate the size layout of the seventh lens. While ensuring that the optical imaging lens has high resolution, the central thickness of the seventh lens is reduced, enabling the optical imaging lens to achieve ultra-thinness.

[0055] In an exemplary embodiment, the axial distance SAG11 from the intersection of the object side surface of the first lens and the optical axis to the vertex of the effective semi-aperture of the object side surface of the first lens and the effective semi-aperture DT11 of the object side surface of the first lens may satisfy: 0 < SAG11 / DT11 < 1. By constraining the ratio of the axial distance from the intersection of the object side surface of the first lens and the optical axis to the vertex of the effective semi-aperture of the object side surface of the first lens to the effective semi-aperture of the object side surface of the first lens within a certain range, it is possible to reduce the rear-end size of the optical imaging lens while ensuring the processability of the first lens, ensure the miniaturization of the optical imaging lens, and contribute to the lens assembly in the optical imaging lens.

[0056] In an exemplary embodiment, the effective focal length f3 of the third lens, the effective focal length f4 of the fourth lens, the effective focal length f5 of the fifth lens, and the effective focal length f6 of the sixth lens may satisfy: -2 < f6 / f5 + f4 / f3 < 0. By constraining the effective focal lengths of the third lens to the sixth lens, it is beneficial to reasonably distribute the optical powers of the lenses in the optical imaging lens, effectively improve the aberration of the optical imaging lens, and improve the resolution of the optical imaging lens.

[0057] In an exemplary embodiment, the air gap T34 between the third lens and the fourth lens on the optical axis and the air gap T45 between the fourth lens and the fifth lens on the optical axis may satisfy: 0 < T34 / T45 < 0.8; and the air gap T56 between the fifth lens and the sixth lens on the optical axis and the air gap T67 between the sixth lens and the seventh lens on the optical axis may satisfy: 0 < T67 / T56 < 0.8. Reasonably controlling the relationship between the air gaps between adjacent lenses from the third lens to the seventh lens on the optical axis is beneficial to reasonably distribute the central thickness of the lenses, reduce the assembly difficulty of the lenses, and control the deflection angle of light.

[0058] In an exemplary embodiment, the optical imaging lens may further include a diaphragm disposed between the object side and the first lens.

[0059] The optical imaging lens according to the above embodiment of the present application may employ multiple lenses, such as the eight lenses described above. By reasonably distributing optical parameters such as the optical powers, surface shapes, central thicknesses of the lenses, and axial spacings between the lenses, it is possible to achieve the ultra-thinning and large field of view of the optical imaging lens, balance the axial aberration of the optical imaging lens, and improve the resolution, imaging quality, and production yield of the optical imaging lens.

[0060] In an embodiment of the present application, at least one of the lens surfaces of each of the first lens to the eighth lens is an aspherical lens surface. The characteristic of an aspherical lens is that the curvature continuously changes from the center of the lens to the periphery of the lens. Different from a spherical lens with a constant curvature from the center of the lens to the periphery, an aspherical lens has better curvature radius characteristics and has the advantages of improving distortion aberration and astigmatism aberration. After using an aspherical lens, it is possible to eliminate the aberration that appears during imaging as much as possible, thereby improving the imaging quality.

[0061] However, those skilled in the art should understand that without departing from the technical solution claimed in the present application, the number of lenses constituting the optical imaging lens can be changed to obtain the various results and advantages described in this specification.

[0062] A specific embodiment of the optical imaging lens applicable to the above embodiment will be further described below with reference to the accompanying drawings.

[0063] Example 1

[0064] The following refers to Figures 1 to 2D Describe the optical imaging lens according to Embodiment 1 of the present application. Figure 1 A schematic structural diagram of an optical imaging lens 100 according to Embodiment 1 of the present application is shown.

[0065] As Figure 1 shown, the optical imaging lens 100 sequentially includes, from the object side to the image side along the optical axis: a first lens E1, a second lens E2, a third lens E3, a fourth lens E4, a fifth lens E5, a sixth lens E6, a seventh lens E7, and an eighth lens E8. The aperture stop STO can be set between the object side and the first lens E1 according to actual needs.

[0066] The first lens E1 has a positive optical power, its object side surface S1 is convex, and its image side surface S2 is concave. The second lens E2 has a positive optical power, its object side surface S3 is convex, and its image side surface S4 is concave. The third lens E3 has a negative optical power, its object side surface S5 is convex, and its image side surface S6 is concave. The fourth lens E4 has a positive optical power, its object side surface S7 is convex, and its image side surface S8 is convex. The fifth lens E5 has a positive optical power, its object side surface S9 is convex, and its image side surface S10 is concave. The sixth lens E6 has a negative optical power, its object side surface S11 is concave, and its image side surface S12 is convex. The seventh lens E7 has a positive optical power, its object side surface S13 is convex, and its image side surface S14 is concave. The eighth lens E8 has a negative optical 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 the object sequentially passes through the surfaces S1 to S18 and finally forms an image on the imaging surface S19.

[0067] Table 1 shows the basic parameter table of the optical imaging lens 100 in Embodiment 1. Among them, the units of the radius of curvature, thickness / distance, and focal length are all millimeters (mm).

[0068]

[0069]

[0070] Table 1

[0071] In Embodiment 1, the object side and the image side of any one of the first lens E1 to the eighth lens E8 are aspherical surfaces. The surface profile x of each aspherical lens can be defined by, but not limited to, the following aspherical formula:

[0072]

[0073] where x is the sagitta, the distance from the vertex of the aspherical surface to the aspherical surface along the optical axis at a position with a height of h; 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 correction coefficient of the i-th order of the aspherical surface. Table 2 gives the higher-order term coefficients A4, A6, A8, A 10 , A 12 , A 14 , A 16 , A 18 , A 20 , A 22 , A 24 , A 26 , A 28 and A 30 .

[0074]

[0075]

[0076] Table 2

[0077] Figure 2A shows the axial chromatic aberration curve of the optical imaging lens 100 in Embodiment 1, which represents the deviation of the convergence points of light rays with different wavelengths after passing through the optical imaging lens 100. Figure 2B shows the astigmatism curve of the optical imaging lens 100 in Embodiment 1, which represents the meridional image plane curvature and the sagittal image plane curvature corresponding to different image heights. Figure 2C shows the distortion curve of the optical imaging lens 100 in Embodiment 1, which represents the distortion magnitude values corresponding to different image heights. Figure 2DShows the longitudinal chromatic aberration curve of the optical imaging lens 100 of Embodiment 1, which represents the deviation of different image heights on the imaging plane after light passes through the lens. According to Figures 2A to 2D it can be known that the optical imaging lens 100 given in Embodiment 1 can achieve good imaging quality.

[0078] Example 2

[0079] The following refers to Figures 3 to 4D Describe the optical imaging lens according to Embodiment 2 of the present application. Figure 3 Shows a schematic structural diagram of the optical imaging lens 200 according to Embodiment 2 of the present application.

[0080] As Figure 3 shown, the optical imaging lens 200 sequentially includes, from the object side to the image side along the optical axis: a first lens E1, a second lens E2, a third lens E3, a fourth lens E4, a fifth lens E5, a sixth lens E6, a seventh lens E7, and an eighth lens E8. The aperture stop STO can be arranged between the object side and the first lens E1 according to actual needs.

[0081] The first lens E1 has a positive optical power, its object side S1 is a convex surface, and its image side S2 is a concave surface. The second lens E2 has a negative optical power, its object side S3 is a convex surface, and its image side S4 is a concave surface. The third lens E3 has a negative optical power, its object side S5 is a convex surface, and its image side S6 is a concave surface. The fourth lens E4 has a positive optical power, its object side S7 is a concave surface, and its image side S8 is a convex surface. The fifth lens E5 has a positive optical power, its object side S9 is a convex surface, and its image side S10 is a concave surface. The sixth lens E6 has a negative optical power, its object side S11 is a concave surface, and its image side S12 is a convex surface. The seventh lens E7 has a positive optical power, its object side S13 is a convex surface, and its image side S14 is a convex surface. The eighth lens E8 has a negative optical power, its object side S15 is a convex surface, and its image side S16 is a concave surface. The filter E9 has an object side S17 and an image side S18. The light from the object sequentially passes through the surfaces S1 to S18 and finally forms an image on the imaging surface S19.

[0082] Table 3 shows the basic parameter table of the optical imaging lens 200 of Embodiment 2, where the units of the radius of curvature, thickness / distance, and focal length are all millimeters (mm).

[0083]

[0084]

[0085] Table 3

[0086] In Embodiment 2, the object side and the image side of any one of the first lens E1 to the eighth lens E8 are aspherical surfaces. Table 4 gives the high-order coefficients A4, A6, A8, A 10 , A 12 , A 14 , A 16 , A 18 and A 20 for each of the aspherical mirror surfaces S1 - S16 in Embodiment 2.

[0087] Plane number A4 A6 A8 A10 A12 A14 A16 A18 A20 S1 1.5251E-02 -4.0594E-04 -7.0770E-04 -2.7046E-04 -1.1965E-04 -5.4951E-05 -2.7699E-05 -1.0594E-05 -3.6582E-06 S2 -9.6563E-04 2.3582E-03 -1.6266E-03 3.4000E-04 -2.0320E-04 4.8800E-05 -1.5323E-05 6.0763E-06 -2.4782E-06 S3 -2.0935E-02 1.7265E-02 -2.6806E-03 4.0743E-04 -4.5326E-04 6.1028E-05 -2.1873E-05 1.0144E-05 -3.8294E-06 S4 -9.6635E-03 1.3272E-02 3.9335E-04 4.5839E-04 -1.0421E-04 -1.6677E-05 -2.2192E-05 -4.7478E-06 -2.6257E-06 S5 -1.6154E-01 6.7886E-03 1.4824E-03 -1.0369E-05 -1.1719E-04 -2.6111E-05 -6.7439E-06 -2.6627E-06 -5.8838E-06 S6 -1.7353E-01 2.5722E-02 4.0762E-03 -3.9886E-04 -3.3737E-04 -3.2090E-05 1.1309E-05 2.3480E-06 -5.3700E-06 S7 -1.7039E-01 1.0945E-02 4.5762E-03 4.5663E-04 -4.6474E-05 1.4898E-04 1.5317E-04 7.3180E-05 1.5899E-05 S8 -3.4718E-01 -4.2256E-03 -3.2749E-03 -2.2811E-03 -1.4135E-03 -5.4645E-04 -1.3779E-04 1.6705E-07 9.7412E-06 S9 -7.8486E-01 1.3183E-01 2.8135E-02 -1.1144E-03 -6.7824E-04 9.2595E-04 -2.0346E-05 1.0410E-04 -1.0971E-04 S10 -8.3634E-01 2.0787E-03 2.1838E-02 1.3678E-02 2.8502E-03 1.6120E-03 -1.2352E-06 3.0769E-04 -7.6657E-05 S11 2.4556E-01 -9.3988E-02 -1.0306E-02 1.9292E-02 -5.8078E-04 1.0372E-03 -7.1124E-04 5.6214E-04 -9.2670E-05 S12 -1.7785E-01 2.0927E-01 -2.7478E-02 1.5016E-02 -9.8933E-03 4.3189E-04 8.2105E-04 9.2489E-04 -6.0670E-04 S13 -2.1431E+00 6.9070E-02 4.2485E-02 6.9245E-03 3.1484E-04 -6.2280E-03 6.3532E-04 6.1105E-04 -1.1134E-04 S14 -9.0456E-01 -3.4344E-02 1.7452E-01 -1.6632E-01 3.8514E-02 -1.6118E-02 1.4855E-02 -1.2543E-02 1.4722E-03 S15 -6.6800E+00 2.1836E+00 -7.7989E-01 2.4053E-01 -6.4437E-02 5.1299E-03 1.1430E-02 -1.0835E-02 3.2000E-03 S16 -1.1708E+01 2.5502E+00 -9.6300E-01 3.7302E-01 -1.3449E-01 5.0816E-02 -1.8676E-02 6.6142E-03 -1.3434E-03

[0088] Table 4

[0089] Figure 4A shows the axial chromatic aberration curve of the optical imaging lens 200 of Embodiment 2, which represents the deviation of the convergence points of light rays of different wavelengths after passing through the optical imaging lens 200. Figure 4B shows the astigmatism curve of the optical imaging lens 200 of Embodiment 2, which represents the meridional image plane curvature and the sagittal image plane curvature corresponding to different image heights. Figure 4C shows the distortion curve of the optical imaging lens 200 of Embodiment 2, which represents the distortion magnitude values corresponding to different image heights. Figure 4D shows the lateral chromatic aberration curve of the optical imaging lens 200 of Embodiment 2, which represents the deviation of different image heights on the imaging plane after the light rays pass through the lens. According to Figures 4A to 4D , it can be seen that the optical imaging lens 200 given in Embodiment 2 can achieve good imaging quality.

[0090] Example 3

[0091] The following will refer to Figures 5 to 6D to describe the optical imaging lens of Embodiment 3 according to the present application. Figure 5 shows a schematic structural diagram of the optical imaging lens 300 of Embodiment 3 according to the present application.

[0092] As Figure 5 shown, the optical imaging lens 300 sequentially includes, from the object side to the image side along the optical axis: a first lens E1, a second lens E2, a third lens E3, a fourth lens E4, a fifth lens E5, a sixth lens E6, a seventh lens E7, and an eighth lens E8. The aperture stop STO can be disposed between the object side and the first lens E1 according to actual needs.

[0093] The first lens E1 has a positive optical power. Its object side S1 is convex, and its image side S2 is concave. The second lens E2 has a negative optical power. Its object side S3 is convex, and its image side S4 is concave. The third lens E3 has a negative optical power. Its object side S5 is convex, and its image side S6 is concave. The fourth lens E4 has a positive optical power. Its object side S7 is concave, and its image side S8 is convex. The fifth lens E5 has a positive optical power. Its object side S9 is convex, and its image side S10 is concave. The sixth lens E6 has a negative optical power. Its object side S11 is concave, and its image side S12 is convex. The seventh lens E7 has a positive optical power. Its object side S13 is convex, and its image side S14 is concave. The eighth lens E8 has a negative optical power. Its object side S15 is convex, and its image side S16 is concave. The filter E9 has an object side S17 and an image side S18. The light from the object sequentially passes through the surfaces S1 to S18 and finally forms an image on the imaging surface S19.

[0094] Table 5 shows the basic parameter table of the optical imaging lens 300 of Embodiment 3, where the units of the radius of curvature, thickness / distance, and focal length are all millimeters (mm).

[0095]

[0096] Table 5

[0097] In Embodiment 3, the object side and the image side of any one of the first lens E1 to the eighth lens E8 are aspherical surfaces. Table 6 gives the high-order term coefficients A4, A6, A8, A 10 , A 12 , A 14 , A 16 , A 18 , and A 20 that can be used for the aspherical mirror surfaces S1-S16 in Embodiment 3.

[0098]

[0099]

[0100] Table 6

[0101] Figure 6A shows the axial chromatic aberration curve of the optical imaging lens 300 of Embodiment 3, which represents the deviation of the focusing points of light rays of different wavelengths after passing through the optical imaging lens 300. Figure 6B shows the astigmatism curve of the optical imaging lens 300 of Embodiment 3, which represents the meridional image plane curvature and the sagittal image plane curvature corresponding to different image heights. Figure 6C shows the distortion curve of the optical imaging lens 300 of Embodiment 3, which represents the distortion magnitude values corresponding to different image heights. Figure 6DShows the longitudinal chromatic aberration curve of the optical imaging lens 300 of Embodiment 3, which represents the deviation of different image heights on the imaging surface after light passes through the lens. According to Figures 6A to 6D it can be known that the optical imaging lens 300 given in Embodiment 3 can achieve good imaging quality.

[0102] Example 4

[0103] The following refers to Figures 7 to 8D to describe the optical imaging lens according to Embodiment 4 of the present application. Figure 7 Shows a schematic structural diagram of the optical imaging lens 400 according to Embodiment 4 of the present application.

[0104] As Figure 7 shown, the optical imaging lens 400 sequentially includes, from the object side to the image side along the optical axis: a first lens E1, a second lens E2, a third lens E3, a fourth lens E4, a fifth lens E5, a sixth lens E6, a seventh lens E7, and an eighth lens E8. The aperture stop STO can be disposed between the object side and the first lens E1 according to actual needs.

[0105] The first lens E1 has a positive focal power, its object side surface S1 is a convex surface, and its image side surface S2 is a concave surface. The second lens E2 has a negative focal power, its object side surface S3 is a convex surface, and its image side surface S4 is a concave surface. The third lens E3 has a negative focal power, its object side surface S5 is a concave surface, and its image side surface S6 is a convex surface. The fourth lens E4 has a positive focal power, its object side surface S7 is a convex surface, and its image side surface S8 is a convex surface. The fifth lens E5 has a positive focal power, its object side surface S9 is a convex surface, and its image side surface S10 is a concave surface. The sixth lens E6 has a negative focal power, its object side surface S11 is a concave surface, and its image side surface S12 is a convex surface. The seventh lens E7 has a positive focal power, its object side surface S13 is a convex surface, and its image side surface S14 is a convex surface. The eighth lens E8 has a negative focal power, its object side surface S15 is a convex surface, and its image side surface S16 is a concave surface. The filter E9 has an object side surface S17 and an image side surface S18. Light from the object sequentially passes through the surfaces S1 to S18 and finally forms an image on the imaging surface S19.

[0106] Table 7 shows the basic parameter table of the optical imaging lens 400 of Embodiment 4, where the units of the radius of curvature, thickness / distance, and focal length are all millimeters (mm).

[0107]

[0108]

[0109] Table 7

[0110] In Embodiment 4, the object side and the image side of any one of the first lens E1 to the eighth lens E8 are aspherical surfaces. Table 8 gives the higher-order term coefficients A4, A6, A8, A 10 , A 12 , A 14 , A 16 , A 18 and A 20 for each of the aspherical mirror surfaces S1 - S16 in Embodiment 4.

[0111] Plane number A4 A6 A8 A10 A12 A14 A16 A18 A20 S1 1.8441E-02 -5.5651E-04 -1.0105E-03 -3.1911E-04 -1.0522E-04 -5.9196E-05 -5.3427E-05 -2.9156E-05 -1.1671E-05 S2 -2.2706E-02 1.5586E-02 -3.6498E-03 1.5821E-03 -4.5311E-04 9.5080E-07 -9.6066E-05 -2.0742E-05 -9.6045E-06 S3 -6.0288E-02 3.1863E-02 -3.2351E-03 2.3326E-03 -2.4715E-04 7.7170E-05 -3.3894E-05 -4.2993E-06 -1.9599E-06 S4 -4.5097E-02 1.4571E-02 -1.2948E-03 1.1274E-03 5.9456E-05 5.0331E-05 7.0538E-07 -1.2452E-06 1.2136E-07 S5 -1.5501E-01 1.0866E-02 2.3956E-03 5.6942E-04 -5.0384E-05 -5.6245E-05 -2.0839E-05 9.6601E-06 6.3014E-06 S6 -1.3553E-01 3.7828E-02 7.6982E-03 6.9658E-04 -6.2964E-04 -2.9522E-04 -5.1620E-05 5.4344E-05 2.5514E-05 S7 -1.6294E-01 1.7270E-03 3.0653E-04 -3.0751E-03 -2.7548E-03 -9.9087E-04 -8.3470E-05 1.3954E-04 4.6220E-05 S8 -3.5378E-01 -7.7393E-03 -2.5538E-03 -3.0490E-04 -9.9406E-04 -4.5298E-04 -2.7027E-04 -5.3096E-05 -7.7122E-06 S9 -7.5596E-01 1.3543E-01 3.5644E-02 4.8402E-03 -2.5672E-03 -6.7403E-04 -9.2750E-04 -1.0074E-04 -2.8918E-05 S10 -7.8997E-01 1.2869E-02 2.5081E-02 2.5710E-02 7.8410E-03 4.3420E-03 7.4859E-04 3.5399E-04 9.9142E-05 S11 2.9827E-01 -7.6141E-02 -2.7373E-02 1.9725E-02 -2.1730E-03 6.3669E-03 -3.5136E-04 1.1487E-03 1.0587E-04 S12 -1.1051E-01 2.3747E-01 -5.6654E-02 7.7262E-03 -8.8296E-03 5.1315E-03 -1.7648E-03 9.5092E-04 -3.6853E-04 S13 -2.1189E+00 -9.5414E-02 -9.7293E-04 -5.5847E-03 -3.9786E-03 -9.8788E-03 -5.6414E-03 -1.2935E-03 -5.1393E-04 S14 -9.1735E-01 -1.3345E-01 1.5278E-01 -1.2562E-01 3.0843E-02 -1.9071E-02 1.2409E-02 -6.3604E-03 -7.0922E-04 S15 -6.2891E+00 1.9890E+00 -7.0248E-01 2.0050E-01 -4.0048E-02 -7.0217E-03 1.1036E-02 -6.6802E-03 1.7792E-03 S16 -1.1698E+01 2.3858E+00 -8.9653E-01 3.4751E-01 -1.2489E-01 5.2316E-02 -1.9809E-02 4.9645E-03 -2.5448E-03

[0112] Table 8

[0113] Figure 8A shows the axial chromatic aberration curve of the optical imaging lens 400 of Embodiment 4, which represents the deviation of the focusing points of light rays with different wavelengths after passing through the optical imaging lens 400. Figure 8B shows the astigmatism curve of the optical imaging lens 400 of Embodiment 4, which represents the meridional image plane curvature and the sagittal image plane curvature corresponding to different image heights. Figure 8C shows the distortion curve of the optical imaging lens 400 of Embodiment 4, which represents the distortion magnitude values corresponding to different image heights. Figure 8D shows the lateral chromatic aberration curve of the optical imaging lens 400 of Embodiment 4, which represents the deviation of different image heights on the imaging plane after the light rays pass through the lens. According to Figures 8A to 8D , it can be seen that the optical imaging lens 400 given in Embodiment 4 can achieve good imaging quality.

[0114] Example 5

[0115] The following refers to Figures 9 to 10D to describe the optical imaging lens of Embodiment 5 according to the present application. Figure 9 shows a schematic structural diagram of the optical imaging lens 500 of Embodiment 5 according to the present application.

[0116] As Figure 9 shown, the optical imaging lens 500 sequentially includes, from the object side to the image side along the optical axis: a first lens E1, a second lens E2, a third lens E3, a fourth lens E4, a fifth lens E5, a sixth lens E6, a seventh lens E7, and an eighth lens E8. The aperture stop STO can be disposed between the object side and the first lens E1 according to actual needs.

[0117] The first lens E1 has a positive optical power, its object side S1 is convex, and its image side S2 is concave. The second lens E2 has a negative optical power, its object side S3 is convex, and its image side S4 is concave. The third lens E3 has a negative optical power, its object side S5 is concave, and its image side S6 is concave. The fourth lens E4 has a positive optical power, its object side S7 is convex, and its image side S8 is convex. The fifth lens E5 has a positive optical power, its object side S9 is concave, and its image side S10 is convex. The sixth lens E6 has a negative optical power, its object side S11 is concave, and its image side S12 is convex. The seventh lens E7 has a positive optical power, its object side S13 is convex, and its image side S14 is convex. The eighth lens E8 has a negative optical power, its object side S15 is convex, and its image side S16 is concave. The filter E9 has an object side S17 and an image side S18. The light from the object sequentially passes through the surfaces S1 to S18 and finally forms an image on the imaging surface S19.

[0118] Table 9 shows the basic parameter table of the optical imaging lens 500 of Example 5, where the units of the radius of curvature, thickness / distance, and focal length are all millimeters (mm).

[0119]

[0120]

[0121] Table 9

[0122] In Example 5, the object side and the image side of any one of the first lens E1 to the eighth lens E8 are aspherical surfaces. Table 10 gives the higher-order term coefficients A4, A6, A8, A 10 , A 12 , A 14 , A 16 , A 18 , and A 20 that can be used for the aspherical mirror surfaces S1 - S16 in Example 5.

[0123] Plane number A4 A6 A8 A10 A12 A14 A16 A18 A20 S1 2.0915E-02 8.8217E-05 -1.8842E-03 -1.0581E-03 -4.5870E-04 -1.7494E-04 -7.4597E-05 -2.4965E-05 -9.2268E-06 S2 -2.2032E-02 1.4387E-02 -5.3582E-03 1.1978E-03 -5.2650E-04 5.7082E-05 -4.5363E-05 5.1874E-06 -2.8205E-07 S3 -5.9647E-02 3.0415E-02 -4.0922E-03 2.2997E-03 -3.7511E-04 7.6016E-05 -3.0996E-05 1.6591E-06 2.9985E-06 S4 -4.9654E-02 1.4429E-02 -8.2471E-04 1.0884E-03 -3.3945E-05 2.2962E-05 -8.8622E-06 -1.5876E-06 -1.8848E-06 S5 -1.5955E-01 6.9296E-03 1.7889E-03 3.0968E-04 -9.8653E-05 -3.4067E-05 -2.3524E-05 -1.2514E-06 -4.8782E-06 S6 -1.3688E-01 3.3938E-02 4.6903E-03 9.6730E-04 -1.7719E-04 -5.7502E-05 -3.7504E-05 -4.7770E-06 2.5929E-06 S7 -1.6398E-01 5.9526E-03 -1.2050E-03 3.4262E-04 -8.6925E-04 -3.4462E-04 -1.2359E-04 -6.6561E-07 1.0692E-05 S8 -3.3553E-01 -7.5776E-03 -2.6269E-03 6.5058E-04 -7.4041E-04 -2.6073E-04 -1.6389E-04 -2.0118E-05 -1.2120E-05 S9 -7.7538E-01 1.3553E-01 4.2390E-02 7.5596E-03 -3.1835E-03 1.9305E-04 -4.9575E-05 2.6750E-04 5.4028E-06 S10 -8.1124E-01 9.5118E-03 2.5596E-02 2.3480E-02 4.2296E-03 3.1111E-03 4.0026E-04 3.0830E-04 3.4952E-05 S11 3.1630E-01 -4.5608E-02 -7.0847E-03 2.1244E-02 -3.5847E-03 4.0953E-03 -1.0358E-03 6.9703E-04 5.7785E-06 S12 -8.8720E-02 2.3074E-01 -5.6120E-02 1.2259E-02 -7.2124E-03 5.2237E-03 -1.5136E-03 8.4143E-04 -3.8219E-04 S13 -2.1182E+00 -3.7775E-02 -2.1290E-03 -2.0214E-02 -7.7984E-03 -7.6451E-03 -2.4153E-03 -1.7080E-04 -2.8843E-04 S14 -8.0867E-01 -6.2381E-02 1.8430E-01 -1.3546E-01 5.1831E-02 -2.1448E-02 1.0696E-02 -8.5274E-03 8.0243E-04 S15 -6.4643E+00 1.8856E+00 -7.1511E-01 1.8658E-01 -4.4305E-02 1.3367E-04 7.9019E-03 -1.0998E-02 4.0805E-03 S16 -1.1539E+01 2.4341E+00 -9.3049E-01 3.5300E-01 -1.4742E-01 5.3717E-02 -2.0885E-02 5.8622E-03 -1.7584E-03

[0124] Table 10

[0125] Figure 10A shows the axial chromatic aberration curve of the optical imaging lens 500 of Example 5, which represents the deviation of the convergence points of light rays of different wavelengths after passing through the optical imaging lens 500. Figure 10B shows the astigmatism curve of the optical imaging lens 500 of Example 5, which represents the meridional image plane curvature and the sagittal image plane curvature corresponding to different image heights. Figure 10C shows the distortion curve of the optical imaging lens 500 of Example 5, which represents the distortion magnitude values corresponding to different image heights. Figure 10DShows the longitudinal chromatic aberration curve of the optical imaging lens 500 of Embodiment 5, which represents the deviation of different image heights on the imaging surface after the light passes through the lens. According to Figures 10A to 10D it can be known that the optical imaging lens 500 given in Embodiment 5 can achieve good imaging quality.

[0126] Example 6

[0127] The following refers to Figures 11 to 12D Describe the optical imaging lens according to Embodiment 6 of the present application. Figure 11 Shows a schematic structural diagram of the optical imaging lens 600 according to Embodiment 6 of the present application.

[0128] As Figure 11 shown, the optical imaging lens 600 sequentially includes, from the object side to the image side along the optical axis: a first lens E1, a second lens E2, a third lens E3, a fourth lens E4, a fifth lens E5, a sixth lens E6, a seventh lens E7, and an eighth lens E8. The aperture stop STO can be disposed between the object side and the first lens E1 according to actual needs.

[0129] The first lens E1 has a positive optical power, its object side surface S1 is a convex surface, and its image side surface S2 is a concave surface. The second lens E2 has a negative optical power, its object side surface S3 is a convex surface, and its image side surface S4 is a concave surface. The third lens E3 has a negative optical power, its object side surface S5 is a concave surface, and its image side surface S6 is a concave surface. The fourth lens E4 has a positive optical power, its object side surface S7 is a convex surface, and its image side surface S8 is a convex surface. The fifth lens E5 has a positive optical power, its object side surface S9 is a convex surface, and its image side surface S10 is a concave surface. The sixth lens E6 has a negative optical power, its object side surface S11 is a concave surface, and its image side surface S12 is a convex surface. The seventh lens E7 has a positive optical power, its object side surface S13 is a convex surface, and its image side surface S14 is a concave surface. The eighth lens E8 has a negative optical power, its object side surface S15 is a convex surface, and its image side surface S16 is a concave surface. The filter E9 has an object side surface S17 and an image side surface S18. The light from the object sequentially passes through the surfaces S1 to S18 and finally forms an image on the imaging surface S19.

[0130] Table 11 shows the basic parameter table of the optical imaging lens 600 of Embodiment 6, where the units of the radius of curvature, thickness / distance, and focal length are all millimeters (mm).

[0131]

[0132] Table 11

[0133] In Embodiment 6, the object side surface and the image side surface of any one of the first lens E1 to the eighth lens E8 are both aspherical surfaces. Table 12 gives the higher-order term coefficients A4, A6, A8, A of the aspherical mirror surfaces S1-S16 that can be used in Embodiment 610 , A 12 , A 14 , A 16 , A 18 and A 20 .

[0134]

[0135]

[0136] Table 12

[0137] Figure 12A shows the axial chromatic aberration curve of the optical imaging lens 600 of Embodiment 6, which represents the deviation of the convergence points of light rays with different wavelengths after passing through the optical imaging lens 600. Figure 12B shows the astigmatism curve of the optical imaging lens 600 of Embodiment 6, which represents the meridional image plane curvature and sagittal image plane curvature corresponding to different image heights. Figure 12C shows the longitudinal chromatic aberration curve of the optical imaging lens 600 of Embodiment 6, which represents the deviation of different image heights of light rays on the imaging plane after passing through the lens. Figure 12D shows the distortion curve of the optical imaging lens 600 of Embodiment 6, which represents the distortion magnitude values corresponding to different image heights. According to Figures 12A to 12D it can be seen that the optical imaging lens 600 given in Embodiment 6 can achieve good imaging quality.

[0138] Example 7

[0139] The following refers to Figures 13 to 14D to describe the optical imaging lens of Embodiment 7 according to the present application. Figure 13 shows a schematic structural diagram of the optical imaging lens 700 of Embodiment 7 according to the present application.

[0140] As Figure 13 shown, the optical imaging lens 700 sequentially includes, from the object side to the image side along the optical axis: a first lens E1, a second lens E2, a third lens E3, a fourth lens E4, a fifth lens E5, a sixth lens E6, a seventh lens E7, and an eighth lens E8. The aperture stop STO can be disposed between the object side and the first lens E1 according to actual needs.

[0141] The first lens E1 has a positive focal power, with its object side S1 being convex and its image side S2 being concave. The second lens E2 has a negative focal power, with its object side S3 being convex and its image side S4 being concave. The third lens E3 has a negative focal power, with its object side S5 being concave and its image side S6 being concave. The fourth lens E4 has a positive focal power, with its object side S7 being concave and its image side S8 being convex. The fifth lens E5 has a positive focal power, with its object side S9 being convex and its image side S10 being concave. The sixth lens E6 has a negative focal power, with its object side S11 being concave and its image side S12 being convex. The seventh lens E7 has a positive focal power, with its object side S13 being convex and its image side S14 being convex. The eighth lens E8 has a negative focal power, with its object side S15 being convex and its image side S16 being concave. The filter E9 has an object side S17 and an image side S18. Light from the object sequentially passes through the surfaces S1 to S18 and finally forms an image on the imaging surface S19.

[0142] Table 13 shows the basic parameter table of the optical imaging lens 700 of Embodiment 7, where the units of the radius of curvature, thickness / distance, and focal length are all millimeters (mm).

[0143]

[0144]

[0145] Table 13

[0146] In Embodiment 7, the object side and the image side of any one of the first lens E1 to the eighth lens E8 are both aspherical surfaces. Table 14 gives the higher-order term coefficients A4, A6, A8, A 10 , A 12 , A 14 , A 16 , A 18 , and A 20 that can be used for the aspherical mirror surfaces S1 - S16 in Embodiment 7.

[0147] Plane number A4 A6 A8 A10 A12 A14 A16 A18 A20 S1 2.1988E-02 2.2108E-04 -9.4263E-04 -4.1194E-04 -2.0933E-04 -1.4605E-04 -9.5897E-05 -4.4128E-05 -1.3433E-05 S2 -2.2451E-02 1.5163E-02 -4.0727E-03 1.8044E-03 -4.4020E-04 7.8955E-05 -6.6945E-05 -7.2796E-06 -4.0448E-06 S3 -5.9806E-02 2.9711E-02 -4.5646E-03 2.5236E-03 -4.5204E-04 1.1271E-04 -3.6728E-05 2.1357E-07 5.8617E-07 S4 -4.5820E-02 1.4103E-02 -2.0457E-03 9.8772E-04 -1.4491E-04 2.8149E-05 -5.8491E-06 -1.0647E-06 1.5458E-06 S5 -1.6023E-01 7.7035E-03 5.1185E-04 6.3900E-05 -1.3988E-04 -3.6903E-05 -6.1773E-07 1.1782E-06 1.2058E-06 S6 -1.3760E-01 3.3663E-02 4.3982E-03 1.0502E-03 -2.2372E-04 -9.2179E-05 -2.4711E-06 2.8435E-06 6.8193E-07 S7 -1.5532E-01 3.1607E-03 1.4373E-03 7.6550E-04 -1.3393E-03 -6.6195E-04 -1.2622E-04 -1.8547E-05 -4.3976E-08 S8 -3.2569E-01 -4.9149E-03 -3.3614E-03 1.3218E-03 -1.4792E-05 -1.6766E-04 -1.0809E-04 -2.1871E-05 -3.2607E-06 S9 -7.8907E-01 1.3847E-01 3.8205E-02 7.2608E-03 -1.0842E-03 -7.4558E-04 -7.8518E-04 -1.2952E-05 3.3434E-05 S10 -8.0541E-01 1.0071E-02 2.9779E-02 2.2034E-02 4.3746E-03 2.9593E-03 1.0368E-03 6.0513E-04 2.0732E-04 S11 3.2779E-01 -3.8429E-02 -5.0324E-03 1.9974E-02 -5.3122E-03 2.4477E-03 9.2880E-04 1.0620E-03 3.4540E-04 S12 -1.0824E-01 2.3075E-01 -5.4871E-02 9.7904E-03 -7.6366E-03 3.2602E-03 -7.1014E-04 3.8652E-04 -1.4039E-04 S13 -1.9949E+00 -3.5549E-02 -2.7356E-02 6.0027E-04 -4.3428E-04 -2.6059E-03 -1.2349E-03 -2.8819E-04 -4.3383E-04 S14 -1.4364E+00 -2.2240E-01 1.2619E-01 -9.6617E-02 4.1590E-02 -2.4730E-02 1.0872E-02 -1.0578E-02 4.8363E-03 S15 -6.5695E+00 1.9021E+00 -6.9706E-01 1.8240E-01 -3.1517E-02 -9.8992E-03 9.2677E-03 -3.6366E-03 6.3119E-03 S16 -1.4590E+01 3.0176E+00 -1.1937E+00 4.2093E-01 -2.0289E-01 6.8995E-02 -4.2322E-02 9.0170E-03 -1.0535E-02

[0148] Table 14

[0149] Figure 14A shows the axial chromatic aberration curve of the optical imaging lens 700 of Embodiment 7, which represents the deviation of the convergence points of light rays with different wavelengths after passing through the optical imaging lens 700. Figure 14B shows the astigmatism curve of the optical imaging lens 700 of Embodiment 7, which represents the meridional image plane curvature and sagittal image plane curvature corresponding to different image heights. Figure 14C shows the distortion curve of the optical imaging lens 700 of Embodiment 7, which represents the distortion magnitude values corresponding to different image heights. Figure 14DThe longitudinal chromatic aberration curve of the optical imaging lens 700 of Embodiment 7 is shown, which represents the deviation of different image heights on the imaging surface after the light passes through the lens. According to Figures 14A to 14D it can be seen that the optical imaging lens 700 given in Embodiment 7 can achieve good imaging quality.

[0150] Table 15 schematically shows some basic parameters in Embodiments 1 to 7.

[0151] Parameter / Example 1 2 3 4 5 6 7 f (mm) 6.29 8.49 8.83 8.14 8.30 8.55 8.58 TTL (mm) 8.71 10.53 10.58 10.30 10.55 10.96 11.09 ImgH (mm) 8.53 8.53 8.53 8.53 8.53 8.53 8.85 Semi - FOV (°) 41.38 40.54 39.12 40.57 38.19 37.04 39.25 Fno 1.83 1.83 1.83 1.83 1.83 1.83 1.91 BFL (mm) 1.34 1.68 1.94 1.71 1.87 2.00 1.92 SAG11 (mm) 0.53 0.87 0.95 0.77 0.84 0.91 0.79 DT11 (mm) 1.72 2.32 2.41 2.23 2.30 2.39 2.25 ET7 (mm) 0.64 0.86 1.13 0.76 0.96 0.87 0.91

[0152] Table 15

[0153] In summary, the conditions in Embodiments 1 to 7 satisfy the relationships shown in Table 16.

[0154]

[0155] Table 16

[0156] This application also provides an imaging device, and its electronic photosensitive element can be a charge-coupled device (CCD) or a complementary metal-oxide-semiconductor device (CMOS). The imaging device can be an independent imaging device such as a digital camera, or an imaging module integrated on a mobile electronic device such as a mobile phone. The imaging device is equipped with the optical imaging lens described above.

[0157] The above description is only the preferred embodiments of this application and the explanation of the applied technical principles. Those skilled in the art should understand that the scope of the invention involved in this application is not limited to the technical solutions formed by the specific combination of the above technical features, but should also cover other technical solutions formed by any combination of the above technical features or their equivalent features without departing from the inventive concept. For example, the technical solutions formed by mutually replacing the above features with the technical features (but not limited to) having similar functions disclosed in this application.

Claims

1. An optical imaging lens, characterized in that, In order from the object side to the image side along the optical axis, it includes: A first lens with positive optical power, where the curvature radii of both its object side and image side are positive; A second lens with optical power, where the curvature radii of both its object side and image side are positive; A third lens with negative optical power; A fourth lens with positive optical power, where the curvature radius of its image side is negative; A fifth lens with positive optical power; A sixth lens with negative optical power, where the curvature radii of both its object side and image side are negative; A seventh lens with positive optical power, where the curvature radius of its object side is positive; and An eighth lens with negative optical power, where the curvature radii of both its object side and image side are positive; The number of lenses with optical power in the optical imaging lens is eight, wherein, the total effective focal length f of the optical imaging lens and half of the maximum field of view angle Semi - FOV of the optical imaging lens satisfy: 5.5mm < tan(Semi - FOV)×f ≤ 7.26mm, The on - axis distance TTL from the object side of the first lens to the imaging plane of the optical imaging lens and half of the diagonal length ImgH of the effective pixel area on the imaging plane of the optical imaging lens satisfy: 1.0 < TTL / ImgH < 1.3, The total effective focal length f of the optical imaging lens, the curvature radius R11 of the object side of the sixth lens and the curvature radius R12 of the image side of the sixth lens satisfy: - 1.62 ≤ (R11 + R12) / f ≤ - 1.15, and The effective focal length f4 of the fourth lens and the total effective focal length f of the optical imaging lens satisfy: 2.13 ≤ f4 / f ≤ 2.

91.

2. The optical imaging lens according to claim 1, characterized in that, The curvature radius R15 of the object side of the eighth lens and the curvature radius R16 of the image side of the eighth lens satisfy: 2.63 ≤ (R15 + R16) / (R15 - R16) ≤ 5.72, 1.42 ≤ R15 / R16 ≤ 2.

23.

3. The optical imaging lens according to claim 1, wherein The central thickness CT2 of the second lens on the optical axis and the central thickness CT4 of the fourth lens on the optical axis satisfy: 2.14 ≤ CT4 / CT2 ≤ 3.

24.

4. The optical imaging lens according to claim 1, wherein The curvature radius R11 of the object side of the sixth lens, the curvature radius R12 of the image side of the sixth lens and the effective focal length f6 of the sixth lens satisfy: 0.58 ≤ (R11 + R12) / f6 ≤ 0.

90.

5. The optical imaging lens according to claim 1, wherein, The central thickness CTg on the optical axis of the lens with Abbe number less than 20 among the first lens to the eighth lens and the central thickness CT4 of the fourth lens on the optical axis satisfy: 0.31 ≤ CTg / CT4 ≤ 0.

81.

6. The optical imaging lens according to claim 1, wherein The on - axis distance BFL from the image side of the eighth lens to the imaging plane of the optical imaging lens and the air space T78 between the seventh lens and the eighth lens on the optical axis satisfy: 1.56 ≤ BFL / T78 ≤ 4.

28.

7. The optical imaging lens according to claim 1, wherein The Abbe number V1 of the first lens, the Abbe number V2 of the second lens, the Abbe number V6 of the sixth lens and the Abbe number V7 of the seventh lens satisfy: V1 + V2 > V6 + V7.

8. The optical imaging lens according to claim 1, characterized in that, The effective focal length f1 of the first lens, the radius of curvature R1 of the object side surface of the first lens, the radius of curvature R2 of the image side surface of the first lens, the effective focal length f2 of the second lens, the radius of curvature R3 of the object side surface of the second lens, and the radius of curvature R4 of the image side surface of the second lens satisfy: 1.02 ≤ (R2 - R1) / f1 + (R4 + R3) / f2 ≤ 2.

56.

9. The optical imaging lens according to claim 1, characterized in that, The center thickness CT7 of the seventh lens on the optical axis and the edge thickness ET7 of the seventh lens satisfy: 1.03 ≤ CT7 / ET7 ≤ 1.

65.

10. The optical imaging lens according to claim 1, characterized in that, The axial distance SAG11 from the intersection point of the object side surface of the first lens and the optical axis to the vertex of the effective semi-aperture of the object side surface of the first lens and the effective semi-aperture DT11 of the object side surface of the first lens satisfy: 0.31 ≤ SAG11 / DT11 ≤ 0.

40.

11. The optical imaging lens according to claim 1, wherein, The effective focal length f3 of the third lens, the effective focal length f4 of the fourth lens, the effective focal length f5 of the fifth lens, and the effective focal length f6 of the sixth lens satisfy: -1.24 ≤ f6 / f5 + f4 / f3 ≤ -0.

32.

12. The optical imaging lens according to claim 1, characterized in that, The air gap T34 between the third lens and the fourth lens on the optical axis and the air gap T45 between the fourth lens and the fifth lens on the optical axis satisfy: 0.19 ≤ T34 / T45 ≤ 0.55; and the air gap T56 between the fifth lens and the sixth lens on the optical axis and the air gap T67 between the sixth lens and the seventh lens on the optical axis satisfy: 0.15 ≤ T67 / T56 ≤ 0.44.

Images