An optical imaging lens

Abstract

The present invention discloses an optical imaging lens, which includes, in order from the object side to the image side along the optical axis: a first lens with positive optical power; a second lens with optical power; a third lens with optical power; a fourth lens with optical power; a fifth lens with optical power, whose object side surface is convex and whose image side surface is concave; a sixth lens with positive optical power, whose object side surface is convex and whose image side surface is concave; a seventh lens with negative optical power; wherein the axial distance TTL from the object side surface of the first lens to the imaging surface and the half of the diagonal length of the effective pixel area on the imaging surface ImgH satisfy: TTL / ImgH<1.25. The optical imaging lens of the present application has the characteristics of high image height, large aperture and ultra-thinness.

Description

Technical Field

[0001] The present invention belongs to the field of optical imaging, and in particular relates to an optical imaging lens comprising seven lenses. Background Art

[0002] As people's demand for camera phones increases, the quality of mobile phone lenses has become an important indicator of mobile phone quality. Recently, the trend of ultra-thin mobile phones has become more and more obvious with the market demand and the continuous upgrading of module technology. The requirements for the imaging quality of mobile phone lenses are getting higher and higher. Having extremely high mobile phone pixels and first-class image processing functions have become a must-have feature of an excellent mobile phone. From the perspective of our mobile phone lenses alone, having higher imaging quality and smaller lens group size can be said to have become an inevitable development trend in the current form.

[0003] However, traditional optical lenses with better imaging quality usually have larger structural dimensions, and reducing the structural dimensions of optical lenses by conventional means usually comes at the expense of the imaging quality of the lens. Therefore, how to reduce the size and structure while improving the imaging quality of the lens has become a major problem facing mobile phone lenses recently. Summary of the invention

[0004] The present invention aims to provide an imaging lens composed of seven lenses, which has good imaging effect. At the same time, its ultra-thin characteristics can provide sufficient space, making the relevant structure and assembly process more flexible without reducing the imaging quality too much.

[0005] The present invention provides an optical imaging lens, which comprises, in order from the object side to the image side along the optical axis: a first lens with positive optical power; a second lens with optical power; a third lens with optical power; a fourth lens with optical power; a fifth lens with optical power, the object side surface of which is convex and the image side surface is concave; a sixth lens with positive optical power, the object side surface of which is convex and the image side surface is concave; and a seventh lens with negative optical power; wherein the on-axis distance TTL from the object side surface of the first lens to the imaging surface and the half of the diagonal length of the effective pixel area on the imaging surface ImgH satisfy the following conditions: TTL / ImgH<1.25.

[0006] According to one embodiment of the present invention, the effective focal length f of the optical imaging lens and the maximum field of view FOV of the optical imaging lens satisfy: 4.8 mm <f×tan(1 / 2FOV)<6.5mm。

[0007] According to one embodiment of the present invention, the effective focal length f of the optical imaging lens and the entrance pupil diameter EPD of the optical imaging lens satisfy: f / EPD<1.9.

[0008] According to one embodiment of the present invention, the effective focal length f6 of the sixth lens, the curvature radius R12 of the image side surface of the sixth lens, and the curvature radius R11 of the object side surface of the sixth lens satisfy: 0.7 <f6 / (R11+R12)<1.5。

[0009] According to one embodiment of the present invention, the effective focal length f4 of the fourth lens and the effective focal length f1 of the first lens satisfy: 2.2 <f4 / f1<3.2。

[0010] According to one embodiment of the present invention, the effective focal length f3 of the third lens and the effective focal length f7 of the seventh lens satisfy: 1.0<(f3+f7) / (f3-f7)<1.5.

[0011] According to one embodiment of the present invention, the radius of curvature R4 of the image side of the second lens, the radius of curvature R3 of the object side of the second lens, the radius of curvature R2 of the image side of the first lens and the radius of curvature R1 of the object side of the first lens satisfy: 1.5<(R3+R4) / (R1+R2)<2.0.

[0012] According to one embodiment of the present invention, the curvature radius R10 of the image side surface of the fifth lens and the curvature radius R9 of the object side surface of the fifth lens satisfy: 0.8 <R9 / R10<1.3。

[0013] According to one embodiment of the present invention, a curvature radius R14 of the image side surface of the seventh lens, a curvature radius R13 of the object side surface of the seventh lens, and a center thickness CT7 of the seventh lens on the optical axis satisfy: 1.7<(R13+R14) / CT7<3.4.

[0014] According to an embodiment of the present invention, the air interval T67 between the sixth lens and the seventh lens on the optical axis and the center thickness CT6 of the sixth lens on the optical axis satisfy: 2.0 <T67 / CT6<2.8。

[0015] According to one embodiment of the present invention, the combined focal length f12 of the first and second lenses, the center thickness CT1 of the first lens on the optical axis, and the center thickness CT2 of the second lens on the optical axis satisfy: 6.6 <f12 / (CT1+CT2)<8.6。

[0016] According to one embodiment of the present invention, the on-axis distance SAG51 between the intersection of the fifth lens object side and the optical axis to the effective radius vertex of the fifth lens object side, the on-axis distance SAG52 between the intersection of the fifth lens image side and the optical axis to the effective radius vertex of the fifth lens image side, the on-axis distance SAG41 between the intersection of the fourth lens object side and the optical axis to the effective radius vertex of the fourth lens object side, and the on-axis distance SAG42 between the intersection of the fourth lens image side and the optical axis to the effective radius vertex of the fourth lens image side satisfy: 1.7<(SAG51+SAG52) / (SAG41+SAG42)<2.5.

[0017] According to one embodiment of the present invention, the on-axis distance SAG71 between the intersection of the seventh lens object side and the optical axis to the effective radius vertex of the seventh lens object side and the on-axis distance SAG61 between the intersection of the sixth lens object side and the optical axis to the effective radius vertex of the sixth lens object side meet the following conditions: 1.6 <SAG71 / SAG61<2.3。

[0018] In one aspect, the present invention provides an optical imaging lens, which includes, in order from the object side to the image side along the optical axis: a first lens with positive optical power; a second lens with optical power; a third lens with optical power; a fourth lens with optical power; a fifth lens with optical power, whose object side surface is convex and whose image side surface is concave; a sixth lens with positive optical power, whose object side surface is convex and whose image side surface is concave; and a seventh lens with negative optical power; wherein the effective focal length f of the optical imaging lens and the maximum field of view FOV of the optical imaging lens satisfy: 4.8 mm <f×tan(1 / 2FOV)<6.5mm。

[0019] Beneficial effects of the present invention:

[0020] The optical imaging lens provided by the present invention includes multiple lenses, such as the first lens to the seventh lens. The size of the lens group can be effectively reduced by reasonably controlling TTL / ImgH, and the positive focal length of the first lens and the negative focal length of the seventh lens can effectively reduce the aberration of the edge field of view while increasing the amount of light passing. At the same time, since the sixth lens has a positive focal length, it will be beneficial to the focal length distribution of the entire lens group, avoiding excessive concentration of focal length, and helping the lens group to balance vertical axis chromatic aberration and lateral chromatic aberration. And controlling the range of TTL / ImgH<1.25 can effectively control the overall length of the system, ensure the ultra-thin characteristics, so that the lens group can be better suitable for the increasing number of ultra-thin electronic products on the market. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0022] Figure 1 Schematic diagram of the structure of a lens assembly of an optical imaging lens embodiment 1 of the present invention;

[0023] Figure 2a to Figure 2d They are respectively an axial chromatic aberration curve, an astigmatism curve, a distortion curve, and a magnification chromatic aberration curve of the optical imaging lens embodiment 1 of the present invention;

[0024] Figure 3 Schematic diagram of the lens group structure of Embodiment 2 of the optical imaging lens of the present invention;

[0025] Figures 4a to 4d They are respectively an axial chromatic aberration curve, an astigmatism curve, a distortion curve, and a magnification chromatic aberration curve of Example 2 of the optical imaging lens of the present invention;

[0026] Figure 5 Schematic diagram of the lens group structure of Embodiment 3 of the optical imaging lens of the present invention;

[0027] Figures 6a to 6d They are respectively an axial chromatic aberration curve, an astigmatism curve, a distortion curve, and a magnification chromatic aberration curve of Example 3 of the optical imaging lens of the present invention;

[0028] Figure 7 Schematic diagram of the lens group structure of Embodiment 4 of the optical imaging lens of the present invention;

[0029] Figures 8a to 8d They are respectively an axial chromatic aberration curve, an astigmatism curve, a distortion curve, and a magnification chromatic aberration curve of Example 4 of the optical imaging lens of the present invention;

[0030] Fig. 9 Schematic diagram of the lens group structure of Embodiment 5 of the optical imaging lens of the present invention;

[0031] Figures 10a to 10d They are respectively the axial chromatic aberration curve, the astigmatism curve, the distortion curve and the magnification chromatic aberration curve of the optical imaging lens embodiment 5 of the present invention. DETAILED DESCRIPTION

[0032] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments 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 work are within the scope of protection of the present invention.

[0033] It should be noted that in this specification, the expressions of first, second, third, etc. are only used to distinguish one feature from another feature, and do not represent any limitation on the features. Therefore, without departing from the teaching of the present invention, the first lens discussed below may also be referred to as the second lens or the third lens.

[0034] It should also be understood that the terms "comprises", "including", "having", "includes" and / or "comprising", 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. In addition, when expressions such as "at least one of..." appear after a list of listed features, they modify the entire listed features rather than modifying the individual elements in the list. In addition, when describing embodiments of the present application, "may" is used to mean "one or more embodiments of the present application". And, the term "exemplary" is intended to refer to an example or illustration.

[0035] In the drawings, the thickness, size and shape of the lenses have been slightly exaggerated for ease of explanation. Specifically, the shapes of the spherical or aspherical surfaces shown in the drawings are shown by way of example. That is, the shapes of the spherical or aspherical surfaces are not limited to the shapes of the spherical or aspherical surfaces shown in the drawings. The drawings are only examples and are not drawn strictly to scale.

[0036] In the description of the present invention, 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 is called the object side of the lens, and the surface of each lens closest to the imaging plane is called the image side of the lens.

[0037] Unless otherwise defined, all terms (including technical terms and scientific terms) used in this article have the same meaning as commonly understood by ordinary technicians in the field to which this application belongs. It should also be understood that terms (such as terms defined in commonly used dictionaries) should be interpreted as having the same meaning as their meaning in the context of the relevant technology, and will not be interpreted in an idealized or overly formal way unless explicitly defined in this article.

[0038] It should be noted that, without conflict, the embodiments in the present invention and the features in the embodiments may be combined with each other. The features, principles and other aspects of the present invention will be described in detail below with reference to the drawings and in conjunction with the embodiments.

[0039] Exemplary Embodiment

[0040] The optical imaging lens according to the exemplary embodiment of the present invention includes seven lenses, which are sequentially arranged from the object side to the image side along the optical axis: a first lens, a second lens, a third lens, a fourth lens, a fifth lens, a sixth lens, and a seventh lens. Among them, each lens is independent of each other, and there is an air gap between each lens on the optical axis.

[0041] In this exemplary embodiment, the first lens has a positive optical power; the second lens may have a positive optical power or a negative optical power; the third lens may have a positive optical power or a negative optical power; the fourth lens may have a positive optical power or a negative optical power; the fifth lens may have a positive optical power or a negative optical power, its object side is convex, and its image side is concave; the sixth lens has a positive optical power, its object side is convex, and its image side is concave; the seventh lens has a negative optical power. Reasonably matching the optical powers and surface shapes of the lenses in the optical imaging system is beneficial to both realizing the rationality of the structure of the optical imaging lens and realizing the ultra-clear photographing function of the lens, and reducing the sensitivity of the system to tolerances.

[0042] In this exemplary embodiment, the condition formula satisfied by the on-axis distance TTL from the object side of the first lens to the imaging plane and half of the diagonal length ImgH of the effective pixel region on the imaging plane is: TTL / ImgH < 1.25. It can achieve a smaller ratio of the total length of the wide-angle lens structure to the image plane compression, realize a thin design effect, and is beneficial to the miniaturization of the system. More specifically, TTL and ImgH satisfy: 1.12 ≤ TTL / ImgH ≤ 1.21.

[0043] In this exemplary embodiment, the effective focal length f of the optical imaging lens and the maximum field of view FOV of the optical imaging lens satisfy: 4.8 mm < f × tan(1 / 2 FOV) < 6.5 mm. By controlling the effective focal length and FOV of the optical imaging lens, it is possible to avoid excessive aberration in the edge field of view while increasing the image height of the system imaging, which helps to better maintain the characteristics of a wide imaging range and high imaging quality of the system. More specifically, 4.95 mm ≤ f × tan(1 / 2 FOV) ≤ 6.01 mm.

[0044] In this exemplary embodiment, the effective focal length f of the optical imaging lens and the entrance pupil diameter EPD of the optical imaging lens satisfy: f / EPD < 1.9. By controlling the ratio range of the effective focal length f of the optical imaging lens and the entrance pupil diameter EPD of the optical imaging lens, the light passing amount of the lens can be effectively increased, and a high relative illumination can be obtained, which can well improve the imaging quality of the lens in a darker environment and give customers a better experience in a darker environment. More specifically, 1.74 ≤ f / EPD ≤ 1.87.

[0045] In this exemplary embodiment, the effective focal length f6 of the sixth lens, the radius of curvature R12 of the image side of the sixth lens, and the radius of curvature R11 of the object side of the sixth lens satisfy: 0.7 < f6 / (R11 + R12) < 1.5. By controlling the effective focal length of the sixth lens and the radii of curvature of the object side and image side of the sixth lens, it is beneficial to improve the overall large aperture effect, and it can avoid field curvature and chromatic aberration, and at the same time, it is not easy to generate astigmatism and spherical aberration. More specifically, 0.75 ≤ f6 / (R11 + R12) ≤ 1.37.

[0046] In this exemplary embodiment, the effective focal length f4 of the fourth lens and the effective focal length f1 of the first lens satisfy: 2.2 < f4 / f1 < 3.2. By reasonably adjusting the effective focal lengths of the first lens and the fourth lens, not only can the optical power of the lens group be more reasonably distributed and not overly concentrated on the fourth lens, which is beneficial to improving the imaging quality of the system and reducing the sensitivity of the system, but also the ultra-thin characteristics of the lens group can be maintained. More specifically, 2.36 ≤ f4 / f1 ≤ 3.00.

[0047] In this exemplary embodiment, the effective focal length f3 of the third lens and the effective focal length f7 of the seventh lens satisfy: 1.0 < (f3 + f7) / (f3 - f7) < 1.5. By reasonably distributing the effective focal lengths of the third lens and the seventh lens, the lens group can more effectively shorten the size, so that while maintaining the ultra-thin characteristics, the excessive concentration of the optical power of the system can be avoided, and combined with 2.2 < f4 / f1 < 3.2, the system aberrations can be better corrected. More specifically, 1.26 ≤ (f3 + f7) / (f3 - f7) ≤ 1.31.

[0048] In the present exemplary embodiment, the radius of curvature R4 of the image side surface of the second lens, the radius of curvature R3 of the object side surface of the second lens, the radius of curvature R2 of the image side surface of the first lens, and the radius of curvature R1 of the object side surface of the first lens satisfy: 1.5 < (R3 + R4) / (R1 + R2) < 2.0. By reasonably allocating the radius of curvature of the object side surface of the first lens and the radii of curvature of the object side surface and the image side surface of the second lens, it is helpful to balance various aberrations of the system and is conducive to correcting the aberrations of the system and improving the imaging quality of the lens group. More specifically, 1.53 ≤ (R3 + R4) / (R1 + R2) ≤ 1.96.

[0049] In the present exemplary embodiment, the radius of curvature R10 of the image side surface of the fifth lens and the radius of curvature R9 of the object side surface of the fifth lens satisfy: 0.8 < R9 / R10 < 1.3. Controlling the radius of curvature of the image side surface of the fifth lens and the radius of curvature of the object side surface of the fifth lens helps to increase the object space, reduce the aberrations of the marginal field of view, and improve the image quality. More specifically, 0.95 ≤ R9 / R10 ≤ 1.20.

[0050] In the present exemplary embodiment, the radius of curvature R14 of the image side surface of the seventh lens, the radius of curvature R13 of the object side surface of the seventh lens, and the central thickness CT7 of the seventh lens on the optical axis satisfy: 1.7 < (R13 + R14) / CT7 < 3.4. By reasonably controlling the radii of curvature of the object side surface and the image side surface of the seventh lens and the central thickness of the seventh lens on the optical axis, the astigmatism and coma of the seventh lens can be effectively balanced. More specifically, 1.82 ≤ (R13 + R14) / CT7 ≤ 3.21.

[0051] In the present exemplary embodiment, the air gap T67 between the sixth lens and the seventh lens on the optical axis and the central thickness CT6 of the sixth lens on the optical axis satisfy: 2.0 < T67 / CT6 < 2.8. By controlling the air gap between the sixth lens and the seventh lens on the optical axis and the central thickness of the sixth lens on the optical axis within a reasonable range, the lens group can better balance the chromatic aberration of the system. At the same time, it will not cause difficulties in the processing technology due to the sixth lens being too thin. More specifically, 2.10 ≤ T67 / CT6 ≤ 2.63.

[0052] In the present exemplary embodiment, the combined focal length f12 of the first and second lenses, the central thickness CT1 of the first lens on the optical axis, and the central thickness CT2 of the second lens on the optical axis satisfy: 6.6 < f12 / (CT1 + CT2) < 8.6. Reasonably controlling the combined focal length of the first and second lenses and the central thicknesses of the first and second lenses on the optical axis is beneficial to the miniaturization of the system, reduces the risk of ghost images brought by it, and effectively reduces the chromatic aberration of the system in cooperation with the first two lenses, while avoiding the difficulties in the process of processing due to the overly thin first two lenses. More specifically, 6.74 ≤ f12 / (CT1 + CT2) ≤ 8.48.

[0053] In the present exemplary embodiment, the axial distance SAG51 between the intersection of the object side surface of the fifth lens and the optical axis and the vertex of the effective radius of the object side surface of the fifth lens, the axial distance SAG52 between the intersection of the image side surface of the fifth lens and the optical axis and the vertex of the effective radius of the image side surface of the fifth lens, the axial distance SAG41 between the intersection of the object side surface of the fourth lens and the optical axis and the vertex of the effective radius of the object side surface of the fourth lens, and the axial distance SAG42 between the intersection of the image side surface of the fourth lens and the optical axis and the vertex of the effective radius of the image side surface of the fourth lens satisfy: 1.7 < (SAG51 + SAG52) / (SAG41 + SAG42) < 2.5. Reasonably controlling this conditional formula, firstly, it helps to increase the effective focal length of the system while maintaining the imaging quality of the lens group; secondly, it helps to improve the spherical aberration in the middle field of view and the coma in the edge field of view, enabling the system to have better aberration correction ability; thirdly, it helps to increase the relative illumination of the system and improve the imaging quality of the lens in a darker environment. More specifically, 1.82 ≤ (SAG51 + SAG52) / (SAG41 + SAG42) ≤ 2.34.

[0054] In the present exemplary embodiment, the axial distance SAG71 between the intersection of the object side surface of the seventh lens and the optical axis and the vertex of the effective radius of the object side surface of the seventh lens and the axial distance SAG61 between the intersection of the object side surface of the sixth lens and the optical axis and the vertex of the effective radius of the object side surface of the sixth lens satisfy: 1.6 < SAG71 / SAG61 < 2.3. Reasonably controlling this conditional formula, firstly, it enables the light to have a certain converging function when passing through the object side surface of the seventh lens, better improving the aberration correction ability of the system; secondly, it helps the system to obtain a smaller F number; thirdly, it avoids process problems such as processing difficulties caused by an overly large SAG71. More specifically, 1.89 ≤ SAG71 / SAG61 ≤ 2.15.

[0055] In this exemplary embodiment, the optical imaging lens may further include a stop. The stop may be disposed at an appropriate position as required, for example, the stop may be disposed between the object side and the first lens. Optionally, the optical imaging 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.

[0056] The optical imaging lens according to the above embodiment of the present invention may use multiple lenses, such as the above seven lenses. By reasonably allocating the focal length, surface shape, center thickness of each lens, and axial spacing between lenses, the optical imaging lens has a larger imaging surface, a wide imaging range, and high imaging quality, and ensures the ultra-thinness of the mobile phone.

[0057] In an exemplary embodiment, at least one of the mirror surfaces of each lens is an aspherical mirror surface, that is, at least one of the mirror surfaces from the object side of the first lens to the image side of the seventh lens is an aspherical mirror surface. The characteristics of the aspherical lens are: the curvature changes continuously from the center of the lens to the periphery of the lens. Unlike the spherical lens with a constant curvature from the center of the lens to the periphery of the lens, the aspherical lens has a better curvature radius characteristic, and has the advantages of improving distortion aberration and improving astigmatism aberration. After adopting the aspherical lens, the aberration that occurs during imaging can be eliminated as much as possible, thereby improving the imaging quality. Optionally, at least one of the object side and image side of each lens in the first lens, the second lens, the third lens, the fourth lens, the fifth lens, the sixth lens and the seventh lens is an aspherical mirror surface. Optionally, the object side and image side of each lens in the first lens, the second lens, the third lens, the fourth lens, the fifth lens, the sixth lens and the seventh lens are all aspherical mirror surfaces.

[0058] 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. For example, although seven lenses are described as an example in the embodiments, the optical imaging lens is not limited to including seven lenses, and the optical imaging lens may also include other numbers of lenses if necessary.

[0059] Specific embodiments of the optical imaging lens applicable to the above embodiments are further described below with reference to the accompanying drawings. Specific embodiment 1

[0061] Figure 1 1 is a schematic diagram of the structure of a lens group of an optical imaging lens embodiment 1 of the present invention. The optical imaging lens includes, in order from the object side to the image side along the optical axis: an aperture STO, a first lens E1, a second lens E2, a third lens E3, a fourth lens E4, a fifth lens E5, a sixth lens E6, a seventh lens E7, a filter E8 and an imaging surface S17.

[0062] The first lens E1 has positive power, and its object side surface S1 is convex, and its image side surface S2 is concave. The second lens E2 has negative power, and its object side surface S3 is convex, and its image side surface S4 is concave. The third lens E3 has negative power, and its object side surface S5 is convex, and its image side surface S6 is concave. The fourth lens E4 has positive power, and its object side surface S7 is convex, and its image side surface S8 is convex. The fifth lens E5 has negative power, and its object side surface S9 is convex, and its image side surface S10 is concave. The sixth lens E6 has positive power, and its object side surface S11 is convex, and its image side surface S12 is concave. The seventh lens E7 has negative power, and its object side surface S13 is concave, and its image side surface S14 is concave. The filter E8 has an object side surface S15 and an image side surface S16. The light from the object passes through each surface of the surfaces S1 to S16 in sequence and is finally imaged on the imaging surface S17.

[0063] As shown in Table 1, it is a basic parameter table of the optical imaging lens of Example 1, wherein the units of the radius of curvature, thickness, and focal length are all millimeters (mm).

[0064] Face number Surface type Radius of curvature Thickness / distance focal length Refractive Index Dispersion coefficient Cone coefficient OBJ Spherical endless endless STO Spherical endless -0.5435 S1 Aspheric 2.1164 0.7019 5.84 1.54 56.1 -0.0688 S2 Aspheric 5.5561 0.1096 -12.1597 S3 Aspheric 9.1386 0.2650 -25.85 1.67 19.2 -21.9509 S4 Aspheric 5.9352 0.4395 1.8599 S5 Aspheric 23.0105 0.2700 -30.47 1.67 19.2 -59.1248 S6 Aspheric 10.8308 0.1019 0.0000 S7 Aspheric 16.6519 0.5716 14.88 1.54 56.1 0.0000 S8 Aspheric -15.6785 0.5397 4.5610 S9 Aspheric 5.3439 0.3500 -167.89 1.57 37.3 -8.7733 S10 Aspheric 4.9411 0.3748 -1.0000 S11 Aspheric 1.8893 0.4210 7.19 1.54 56.1 -1.0000 S12 Aspheric 3.3538 0.9372 -1.0000 S13 Aspheric -3.7109 0.4325 -3.77 1.54 55.7 -1.0000 S14 Aspheric 4.6346 0.1875 0.0475 S15 Spherical endless 0.2100 1.52 64.2 S16 Spherical endless 0.2278 S17 Spherical endless

[0065] Table 1

[0066] As shown in Table 2, in Example 1, the total effective focal length of the optical imaging lens is f=4.96 mm, the distance TTL from the object-side surface S1 of the first lens E1 to the imaging surface S17 on the optical axis is 6.14 mm, and half of the diagonal length of the effective pixel area on the imaging surface S17 is ImgH=5.35 mm.

[0067]

[0068]

[0069] Table 2

[0070] The optical imaging lens in Example 1 satisfies:

[0071] TTL / ImgH=1.15, where TTL is the axial distance from the object side of the first lens to the imaging surface, and ImgH is half of the diagonal length of the effective pixel area on the imaging surface;

[0072] f×tan(1 / 2FOV)=5.23mm, where f is the effective focal length of the optical imaging lens, and FOV is the maximum field of view of the optical imaging lens;

[0073] f / EPD=1.74, where f is the effective focal length of the optical imaging lens and EPD is the entrance pupil diameter of the optical imaging lens;

[0074] f6 / (R11+R12)=1.37, where f6 is the effective focal length of the sixth lens, R12 is the radius of curvature of the image side surface of the sixth lens, and R11 is the radius of curvature of the object side surface of the sixth lens;

[0075] f4 / f1=2.55, where f4 is the effective focal length of the fourth lens, and f1 is the effective focal length of the first lens;

[0076] (f3+f7) / (f3-f7)=1.28, where f3 is the effective focal length of the third lens, and f7 is the effective focal length of the seventh lens;

[0077] (R3+R4) / (R1+R2)=1.96, where R4 is the radius of curvature of the image side of the second lens, R3 is the radius of curvature of the object side of the second lens, R2 is the radius of curvature of the image side of the first lens, and R1 is the radius of curvature of the object side of the first lens.

[0078] R9 / R10=1.08, where R10 is the radius of curvature of the image side surface of the fifth lens, and R9 is the radius of curvature of the object side surface of the fifth lens;

[0079] (R13+R14) / CT7=2.14, where R14 is the curvature radius of the image side surface of the seventh lens, R13 is the curvature radius of the object side surface of the seventh lens, and CT7 is the center thickness of the seventh lens on the optical axis;

[0080] T67 / CT6=2.23, where T67 is the air spacing between the sixth lens and the seventh lens on the optical axis, and CT6 is the center thickness of the sixth lens on the optical axis;

[0081] f12 / (CT1+CT2)=7.34, where f12 is the combined focal length of the first and second lenses, CT1 is the center thickness of the first lens on the optical axis, and CT2 is the center thickness of the second lens on the optical axis;

[0082] (SAG51+SAG52) / (SAG41+SAG42)=1.82, wherein SAG51 is the on-axis distance between the intersection of the fifth lens object side and the optical axis to the vertex of the effective radius of the fifth lens object side, SAG52 is the on-axis distance between the intersection of the fifth lens image side and the optical axis to the vertex of the effective radius of the fifth lens image side, SAG41 is the on-axis distance between the intersection of the fourth lens object side and the optical axis to the vertex of the effective radius of the fourth lens object side, and SAG42 is the on-axis distance between the intersection of the fourth lens image side and the optical axis to the vertex of the effective radius of the fourth lens image side;

[0083] SAG71 / SAG61=1.89, wherein SAG71 is the on-axis distance between the intersection of the object side of the seventh lens and the optical axis to the vertex of the effective radius of the object side of the seventh lens, and SAG61 is the on-axis distance between the intersection of the object side of the sixth lens and the optical axis to the vertex of the effective radius of the object side of the sixth lens.

[0084] In Example 1, the object side surface and the image side surface of any lens among the first lens E1 to the seventh lens E7 are both aspherical surfaces, and the surface shape x of each aspherical lens can be defined by but not limited to the following aspherical surface formula:

[0085]

[0086] Wherein, x is the distance vector height from the vertex of the aspheric surface when the aspheric surface is 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 curvature radius R in Table 1); k is the cone coefficient; Ai is the correction coefficient of the i-th order aspheric surface.

[0087] In Example 1, the object side surface and the image side surface of any one of the first lens E1 to the seventh lens E7 are aspherical surfaces. Table 3 shows the high-order coefficients A4, A6, A8, A9, A10, A11, A12, A13, A14, A15, A16, A17, A18, A19, A20, A21, A22, A23, A24, A25, A26, A27, A28, A29, A30, A31, A32, A33, A34, A35, A36, A37, A38, A39, A40, A41, A42, A43, A44, A45, A46, A47, A48, A49, A50, A51, A52, A53, A54, A55, A56, A57, A58, A5 10 , A 12 , A 14 , A 16 , A 18 , A 20 , A 22 , A 24 , A 26 , A 28 and A 30 .

[0088] Face number A4 A6 A8 A10 A12 A14 A16 S1 -2.0220E-03 2.5242E-02 -6.8368E-02 1.1823E-01 -1.2796E-01 8.7411E-02 -3.6605E-02 S2 -1.3708E-02 -3.9008E-03 2.2421E-02 -3.7655E-02 4.0048E-02 -2.6303E-02 9.5737E-03 S3 -2.6037E-02 1.8193E-02 2.0549E-03 -2.5426E-03 -1.5819E-03 3.3793E-03 -3.0222E-03 S4 -3.6926E-03 1.0246E-02 3.8236E-02 -8.4254E-02 1.1325E-01 -9.8159E-02 5.2360E-02 S5 -5.2434E-02 5.8028E-02 -1.8374E-01 3.8089E-01 -5.1865E-01 4.4797E-01 -2.3602E-01 S6 -6.1083E-02 2.7840E-02 -2.2673E-02 -2.4803E-03 2.6309E-02 -2.8525E-02 1.5503E-02 S7 -4.6187E-02 2.3335E-02 -3.2818E-02 3.3371E-02 -2.2746E-02 9.5428E-03 -1.8264E-03 S8 -3.7444E-02 2.2937E-02 -4.1516E-02 4.5463E-02 -3.3008E-02 1.5751E-02 -4.7099E-03 S9 -6.3383E-02 7.7447E-02 -7.4394E-02 4.9135E-02 -2.2671E-02 6.7968E-03 -1.2410E-03 S10 -1.4784E-01 1.4721E-01 -1.1966E-01 7.2993E-02 -3.2173E-02 9.7821E-03 -2.0012E-03 S11 -1.0499E-01 6.6667E-02 -4.8434E-02 2.2535E-02 -7.5871E-03 1.8782E-03 -3.2998E-04 S12 -1.8248E-02 1.1190E-02 -1.1902E-02 4.3585E-03 -8.1335E-04 8.5440E-05 -4.7835E-06 S13 -1.0010E-01 7.4049E-02 -3.0671E-02 8.6951E-03 -1.7075E-03 2.3314E-04 -2.2218E-05 S14 -1.0593E-01 5.6884E-02 -1.9954E-02 4.4740E-03 -6.4418E-04 5.7435E-05 -2.7237E-06 Face number A18 A20 A22 A24 A26 A28 A30 S1 8.5797E-03 -8.6740E-04 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 S2 -1.5676E-03 4.5470E-05 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 S3 1.5472E-03 -3.1052E-04 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 S4 -1.5214E-02 1.8637E-03 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 S5 6.9119E-02 -8.5643E-03 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 S6 -4.2177E-03 4.5685E-04 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 S7 2.1208E-05 2.4759E-05 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 S8 7.9847E-04 -5.8035E-05 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 S9 1.2272E-04 -4.5633E-06 -6.2761E-08 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 S10 2.6974E-04 -2.2989E-05 1.1272E-06 -2.4996E-08 1.0224E-10 -4.0113E-12 0.0000E+00 S11 3.9913E-05 -3.2223E-06 1.6444E-07 -4.6896E-09 4.9944E-11 3.0952E-13 0.0000E+00 S12 7.2255E-08 8.1741E-09 -6.4015E-10 2.5747E-11 -8.2938E-13 2.1541E-14 -2.9136E-16 S13 1.4725E-06 -6.6636E-08 1.9780E-09 -3.5921E-11 3.7516E-13 -3.2170E-15 3.6712E-17 S14 8.2944E-09 6.9462E-09 -4.0505E-10 1.0187E-11 -1.0074E-13 0.0000E+00 0.0000E+00

[0089] Table 3

[0090] Figure 2a The axial chromatic aberration curve of the optical imaging lens of Example 1 is shown, which indicates the deviation of light of different wavelengths from the focal point behind the lens. Figure 2b The astigmatism curve of the optical imaging lens of Example 1 is shown, which represents the meridional image curvature and the sagittal image curvature. Figure 2c The distortion curve of the optical imaging lens of Example 1 is shown, which represents the distortion magnitude values ​​corresponding to different image heights. Figure 2d The magnification chromatic aberration curve of the optical imaging lens of Example 1 is shown, which represents the deviation of different image heights on the imaging surface after the light passes through the lens. Figure 2a to Figure 2d It can be seen from the figure that the optical imaging lens provided in Example 1 can achieve good imaging quality. Specific embodiment 2

[0092] Figure 3 2 is a schematic diagram of the lens group structure of an optical imaging lens embodiment 2 of the present invention. The optical imaging lens includes, from the object side to the image side along the optical axis, an aperture STO, a first lens E1, a second lens E2, a third lens E3, a fourth lens E4, a fifth lens E5, a sixth lens E6, a seventh lens E7, a filter E8 and an imaging surface S17.

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

[0094] As shown in Table 4, it is a basic parameter table of the optical imaging lens of Example 2, wherein the units of the radius of curvature, thickness, and focal length are all millimeters (mm).

[0095]

[0096]

[0097] Table 4

[0098] As shown in Table 5, in Example 2, the total effective focal length of the optical imaging lens is f=5.34 mm, the distance TTL from the object side surface S1 of the first lens E1 to the imaging surface S17 on the optical axis is 6.60 mm, and half of the diagonal length of the effective pixel area on the imaging surface S17 is ImgH=5.90 mm. The parameters of each relational expression are as explained in the first embodiment, and the values ​​of each relational expression are listed in the following table.

[0099]

[0100] Table 5

[0101] In Example 2, the object side surface and the image side surface of any one of the first lens E1 to the seventh lens E7 are aspherical surfaces. Table 6 shows the high-order coefficients A4, A6, A8, A9, A10, A11, A12, A13, A14, A15, A16, A17, A18, A19, A20, A21, A22, A23, A24, A25, A26, A27, A28, A29, A30, A31, A32, A33, A34, A35, A36, A37, A38, A39, A40, A41, A42, A43, A44, A45, A46, A47, A48, A49, A50, A51, A52, A53, A54, A55, A56, A57, A58, A5 10 , A 12 , A 14 , A 16 , A 18 , A 20 , A 22 , A 24 , A 26 , A 28 and A 30 .

[0102]

[0103]

[0104] Table 6

[0105] Figure 4a The axial chromatic aberration curve of the optical imaging lens of Example 2 is shown, which indicates that light of different wavelengths deviates from the focal point behind the lens. Figure 4b The astigmatism curve of the optical imaging lens of Example 2 is shown, which represents the meridional image curvature and the sagittal image curvature. Figure 4c The distortion curve of the optical imaging lens of Example 2 is shown, which represents the distortion magnitude values ​​corresponding to different image heights. Figure 4d The magnification chromatic aberration curve of the optical imaging lens of Example 2 is shown, which represents the deviation of different image heights on the imaging surface after the light passes through the lens. Figures 4a to 4d It can be seen from the figure that the optical imaging lens provided in Example 2 can achieve good imaging quality. Specific embodiment 3

[0107] Figure 5 2 is a schematic diagram of the lens group structure of Embodiment 3 of the optical imaging lens of the present invention. The optical imaging lens comprises, in order from the object side to the image side along the optical axis: an aperture STO, a first lens E1, a second lens E2, a third lens E3, a fourth lens E4, a fifth lens E5, a sixth lens E6, a seventh lens E7, a filter E8 and an imaging surface S17.

[0108] The first lens E1 has positive power, and its object side surface S1 is convex, and its image side surface S2 is concave. The second lens E2 has negative power, and its object side surface S3 is convex, and its image side surface S4 is concave. The third lens E3 has negative power, and its object side surface S5 is convex, and its image side surface S6 is concave. The fourth lens E4 has positive power, and its object side surface S7 is convex, and its image side surface S8 is convex. The fifth lens E5 has negative power, and its object side surface S9 is convex, and its image side surface S10 is concave. The sixth lens E6 has positive power, and its object side surface S11 is convex, and its image side surface S12 is concave. The seventh lens E7 has negative power, and its object side surface S13 is concave, and its image side surface S14 is concave. The filter E8 has an object side surface S15 and an image side surface S16. The light from the object passes through each surface of the surfaces S1 to S16 in sequence and is finally imaged on the imaging surface S17.

[0109] As shown in Table 7, it is a basic parameter table of the optical imaging lens of Example 3, wherein the units of the radius of curvature, thickness, and focal length are all millimeters (mm).

[0110]

[0111]

[0112] Table 7

[0113] As shown in Table 8, in Example 3, the total effective focal length of the optical imaging lens is f=5.89 mm, the distance TTL from the object side surface S1 of the first lens E1 to the imaging surface S17 on the optical axis is 7.22 mm, and half of the diagonal length of the effective pixel area on the imaging surface S17 is ImgH=6.20 mm. The parameters of each relational expression are as explained in the first embodiment, and the values ​​of each relational expression are listed in the following table.

[0114]

[0115] Table 8

[0116] In Example 3, the object side surface and the image side surface of any one of the first lens E1 to the seventh lens E7 are aspherical surfaces. Table 9 shows the high-order coefficients A4, A6, A8, A9, A10, A11, A12, A13, A14, A15, A16, A17, A18, A19, A20, A21, A22, A23, A24, A25, A26, A27, A28, A29, A30, A31, A32, A33, A34, A35, A36, A37, A38, A39, A40, A41, A42, A43, A44, A45, A46, A47, A48, A49, A50, A51, A52, A53, A54, A55, A56, A57, A58, A5 10 , A 12 , A 14 , A 16 , A 18 , A 20 , A 22 , A 24 , A 26 , A 28 and A 30 .

[0117]

[0118]

[0119] Table 9

[0120] Figure 6a The axial chromatic aberration curve of the optical imaging lens of Example 3 is shown, which indicates that light of different wavelengths deviates from the focal point behind the lens. Figure 6b The astigmatism curve of the optical imaging lens of Example 3 is shown, which represents the meridional image curvature and the sagittal image curvature. Figure 6c The distortion curve of the optical imaging lens of Example 3 is shown, which represents the distortion magnitude values ​​corresponding to different image heights. Figure 6d The magnification chromatic aberration curve of the optical imaging lens of Example 3 is shown, which represents the deviation of different image heights on the imaging surface after the light passes through the lens. Figures 6a to 6d It can be seen from the figure that the optical imaging lens provided in Example 3 can achieve good imaging quality. Specific embodiment 4

[0122] Figure 7 Schematic diagram of the lens group structure of embodiment 4 of the optical imaging lens of the present invention. The optical imaging lens comprises, in order from the object side to the image side along the optical axis: an aperture STO, a first lens E1, a second lens E2, a third lens E3, a fourth lens E4, a fifth lens E5, a sixth lens E6, a seventh lens E7, a filter E8 and an imaging surface S17.

[0123] The first lens E1 has positive focal power, and its object side surface S1 is convex, and its image side surface S2 is concave. The second lens E2 has negative focal power, and its object side surface S3 is convex, and its image side surface S4 is concave. The third lens E3 has negative focal power, and its object side surface S5 is convex, and its image side surface S6 is concave. The fourth lens E4 has positive focal power, and its object side surface S7 is convex, and its image side surface S8 is convex. The fifth lens E5 has positive focal power, and its object side surface S9 is convex, and its image side surface S10 is concave. The sixth lens E6 has positive focal power, and its object side surface S11 is convex, and its image side surface S12 is concave. The seventh lens E7 has negative focal power, and its object side surface S13 is concave, and its image side surface S14 is concave. The filter E8 has an object side surface S15 and an image side surface S16. The light from the object passes through each surface of the surfaces S1 to S16 in sequence and is finally imaged on the imaging surface S17.

[0124] As shown in Table 10, it is a basic parameter table of the optical imaging lens of Example 4, wherein the units of the curvature radius, thickness, and focal length are all millimeters (mm).

[0125] Face number Surface type Radius of curvature Thickness / distance focal length Refractive Index Dispersion coefficient Cone coefficient OBJ Spherical endless endless STO Spherical endless -0.4524 S1 Aspheric 2.3157 0.6131 7.59 1.54 56.1 -0.0421 S2 Aspheric 4.7569 0.1164 -18.2187 S3 Aspheric 5.7558 0.3400 -77.22 1.67 19.2 -23.5638 S4 Aspheric 5.0617 0.4148 0.6277 S5 Aspheric 22.6746 0.3500 -36.47 1.67 19.2 -121.1523 S6 Aspheric 11.7515 0.1104 0.0000 S7 Aspheric 12.5515 0.6164 22.79 1.54 56.1 0.0000 S8 Aspheric -1399.9501 0.5000 4.1019 S9 Aspheric 4.4322 0.4000 100.01 1.57 37.3 -9.2145 S10 Aspheric 4.6480 0.3844 -1.0000 S11 Aspheric 2.0109 0.4099 6.13 1.54 56.1 -1.0000 S12 Aspheric 4.6770 1.0058 -1.0000 S13 Aspheric -4.0370 0.4493 -4.14 1.54 55.7 -1.0000 S14 Aspheric 5.1307 0.2677 0.0389 S15 Spherical endless 0.2100 1.52 64.2 S16 Spherical endless 0.3220 S17 Spherical endless

[0126] Table 10

[0127] As shown in Table 11, in Example 4, the total effective focal length of the optical imaging lens is f=5.16 mm, the distance TTL from the object side surface S1 of the first lens E1 to the imaging surface S17 on the optical axis is 6.51 mm, and half of the diagonal length of the effective pixel area on the imaging surface S17 is ImgH=5.73 mm. The parameters of each relational expression are as explained in the first embodiment, and the values ​​of each relational expression are listed in the following table.

[0128]

[0129]

[0130] Table 11

[0131] In Example 4, the object side surface and the image side surface of any one of the first lens E1 to the seventh lens E7 are aspherical surfaces. Table 12 shows the high-order coefficients A4, A6, A8, A9, A10, A11, A12, A13, A14, A15, A16, A17, A18, A19, A20, A21, A22, A23, A24, A25, A26, A27, A28, A29, A30, A31, A32, A33, A34, A35, A36, A37, A38, A39, A40, A41, A42, A43, A44, A45, A46, A47, A48, A49, A50, A51, A52, A53, A54, A55, A56, A57, A58, A 10 , A 12 , A 14 , A 16 , A 18 , A 20 , A 22 , A 24 , A 26 , A 28 and A 30 .

[0132] Face number A4 A6 A8 A10 A12 A14 A16 S1 -2.5587E-03 1.4338E-02 -2.3514E-02 1.8892E-02 -9.5080E-04 -1.0097E-02 7.7134E-03 S2 -4.1850E-03 5.9643E-03 -5.3200E-02 1.3564E-01 -1.8382E-01 1.4689E-01 -6.8750E-02 S3 -1.2373E-02 -1.1530E-02 3.5249E-02 -4.4287E-02 3.8562E-02 -2.0650E-02 6.0764E-03 S4 -4.0037E-03 -1.6668E-02 9.6016E-02 -2.1444E-01 2.9901E-01 -2.5476E-01 1.2877E-01 S5 -2.0398E-02 -3.0271E-03 -2.3645E-03 5.1980E-03 -1.1270E-02 1.3458E-02 -8.8512E-03 S6 -3.4476E-02 1.8007E-02 -2.0209E-02 1.2823E-02 -4.8609E-03 1.8755E-04 7.8413E-04 S7 -4.0984E-02 2.8493E-02 -2.6282E-02 2.0169E-02 -1.2053E-02 4.9947E-03 -1.2589E-03 S8 -4.8096E-02 3.2419E-02 -3.5347E-02 2.7071E-02 -1.3908E-02 4.6615E-03 -9.6050E-04 S9 -6.8594E-02 6.7652E-02 -5.1174E-02 2.7931E-02 -1.0752E-02 2.6828E-03 -4.0668E-04 S10 -1.4816E-01 1.1839E-01 -7.8797E-02 4.1800E-02 -1.6153E-02 4.2601E-03 -7.4865E-04 S11 -6.3609E-02 2.7576E-02 -1.8466E-02 7.8853E-03 -2.4171E-03 5.3400E-04 -8.2177E-05 S12 3.1609E-02 -2.1853E-02 5.1998E-03 -1.0093E-03 1.9012E-04 -2.7279E-05 2.4310E-06 S13 -4.5560E-02 1.8785E-02 -3.3539E-03 3.8264E-04 -3.1326E-05 1.7107E-06 -3.2131E-08 S14 -4.8602E-02 1.2673E-02 -1.8648E-03 5.8670E-06 5.2336E-05 -1.0792E-05 1.1831E-06 Face number A18 A20 A22 A24 A26 A28 A30 S1 -2.4053E-03 2.8030E-04 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 S2 1.7344E-02 -1.8167E-03 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 S3 -8.2907E-04 3.1044E-05 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 S4 -3.5424E-02 4.0853E-03 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 S5 3.0317E-03 -4.1291E-04 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 S6 -3.2022E-04 4.3300E-05 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 S7 1.7241E-04 -9.9287E-06 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 S8 1.1015E-04 -5.3823E-06 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 S9 3.3143E-05 -9.5589E-07 -1.7881E-08 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 S10 8.6070E-05 -6.2137E-06 2.5570E-07 -4.6635E-09 1.3483E-11 -5.3041E-13 0.0000E+00 S11 8.6076E-06 -5.9824E-07 2.6222E-08 -6.4341E-10 6.0149E-12 2.7477E-14 0.0000E+00 S12 -1.1069E-07 3.3236E-10 2.1427E-10 -9.3167E-12 1.2906E-13 -6.3194E-17 4.8297E-18 S13 -3.5437E-09 3.5620E-10 -1.6337E-11 4.7001E-13 -9.7143E-15 1.4797E-16 -1.2169E-18 S14 -8.1083E-08 3.5732E-09 -9.8533E-11 1.5489E-12 -1.0601E-14 0.0000E+00 0.0000E+00

[0133] Table 12

[0134] Figure 8a The axial chromatic aberration curve of the optical imaging lens of Example 4 is shown, which indicates the deviation of light of different wavelengths from the focal point behind the lens. Figure 8b The astigmatism curve of the optical imaging lens of Example 4 is shown, which represents the meridional image curvature and the sagittal image curvature. Figure 8c The distortion curve of the optical imaging lens of Example 4 is shown, which represents the distortion magnitude values ​​corresponding to different image heights. Figure 8d The magnification chromatic aberration curve of the optical imaging lens of Example 4 is shown, which represents the deviation of different image heights on the imaging surface after the light passes through the lens. Figures 8a to 8d It can be seen from the figure that the optical imaging lens provided in Example 4 can achieve good imaging quality. Specific embodiment 5

[0136] Fig. 92 is a schematic diagram of the lens group structure of an optical imaging lens embodiment 5 of the present invention. The optical imaging lens includes, in order from the object side to the image side along the optical axis: an aperture STO, a first lens E1, a second lens E2, a third lens E3, a fourth lens E4, a fifth lens E5, a sixth lens E6, a seventh lens E7, a filter E8 and an imaging surface S17.

[0137] The first lens E1 has positive power, and its object side surface S1 is convex, and its image side surface S2 is concave. The second lens E2 has positive power, and its object side surface S3 is convex, and its image side surface S4 is concave. The third lens E3 has negative power, and its object side surface S5 is convex, and its image side surface S6 is concave. The fourth lens E4 has positive power, and its object side surface S7 is convex, and its image side surface S8 is convex. The fifth lens E5 has positive power, and its object side surface S9 is convex, and its image side surface S10 is concave. The sixth lens E6 has positive power, and its object side surface S11 is convex, and its image side surface S12 is concave. The seventh lens E7 has negative power, and its object side surface S13 is concave, and its image side surface S14 is concave. The filter E8 has an object side surface S15 and an image side surface S16. The light from the object passes through each surface of the surfaces S1 to S16 in sequence and is finally imaged on the imaging surface S17.

[0138] As shown in Table 13, it is a basic parameter table of the optical imaging lens of Example 5, wherein the units of the radius of curvature, thickness, and focal length are all millimeters (mm).

[0139] Face number Surface type Radius of curvature Thickness / distance focal length Refractive Index Dispersion coefficient Cone coefficient OBJ Spherical endless endless STO Spherical endless -0.5204 S1 Aspheric 2.1026 0.6887 7.11 1.54 56.1 -0.0870 S2 Aspheric 4.0586 0.1000 -17.2239 S3 Aspheric 5.7667 0.3400 290709.12 1.67 19.2 -36.4735 S4 Aspheric 5.6295 0.4097 1.7566 S5 Aspheric 29.1119 0.3500 -33.15 1.67 19.2 -83.7050 S6 Aspheric 12.6180 0.1000 0.0000 S7 Aspheric 20.1862 0.6095 18.84 1.54 56.1 0.0000 S8 Aspheric -20.7547 0.4513 3.9044 S9 Aspheric 5.1229 0.4000 177.28 1.57 37.3 -7.5826 S10 Aspheric 5.2432 0.3580 -1.0000 S11 Aspheric 2.0764 0.4000 6.60 1.54 56.1 -1.0000 S12 Aspheric 4.5688 0.8390 -1.0000 S13 Aspheric -3.8702 0.3763 -3.84 1.54 55.7 -1.0000 S14 Aspheric 4.5563 0.2597 0.0392 S15 Spherical endless 0.2100 1.52 64.2 S16 Spherical endless 0.3081 S17 Spherical endless

[0140] Table 13

[0141] As shown in Table 14, in Example 5, the total effective focal length of the optical imaging lens is f=4.97 mm, the distance TTL from the object side surface S1 of the first lens E1 to the imaging surface S17 on the optical axis is 6.20 mm, and half of the diagonal length of the effective pixel area on the imaging surface S17 is ImgH=5.12 mm. The parameters of each relational expression are as explained in the first embodiment, and the values ​​of each relational expression are listed in the following table.

[0142]

[0143] Table 14

[0144] In Example 5, the object side surface and the image side surface of any one of the first lens E1 to the seventh lens E7 are aspherical surfaces. Table 15 shows the high-order coefficients A4, A6, A8, A9, A10, A11, A12, A13, A14, A15, A16, A17, A18, A19, A20, A21, A22, A23, A24, A25, A26, A27, A28, A29, A30, A31, A32, A33, A34, A35, A36, A37, A38, A39, A40, A41, A42, A43, A44, A45, A46, A47, A48, A49, A50, A51, A52, A53, A54, A55, A56, A57, A58, A 10 , A 12 , A 14 , A 16 , A 18 , A 20, A 22 , A 24 , A 26 , A 28 and A 30 .

[0145]

[0146]

[0147] Table 15

[0148] Fig.10a The axial chromatic aberration curve of the optical imaging lens of Example 5 is shown, which indicates the deviation of light of different wavelengths from the focal point behind the lens. Fig.10b The astigmatism curve of the optical imaging lens of Example 5 is shown, which represents the meridional image curvature and the sagittal image curvature. Fig.10c The distortion curve of the optical imaging lens of Example 5 is shown, which represents the distortion magnitude values ​​corresponding to different image heights. Fig.10d The magnification chromatic aberration curve of the optical imaging lens of Example 5 is shown, which represents the deviation of different image heights on the imaging surface after the light passes through the lens. Figures 10a to 10d It can be seen from the figure that the optical imaging lens provided in Example 5 can achieve good imaging quality.

[0149] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, improvements, equivalent substitutions, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. An optical imaging lens, characterized in that: The optical imaging lens has seven lenses, and the seven lenses include, in order from the object side to the image side along the optical axis: The first lens has positive refractive power, and its object side surface is convex and its image side surface is concave; a second lens having optical power, wherein the object side surface is convex and the image side surface is concave; The third lens has a negative optical power, and its object side surface is convex and its image side surface is concave; a fourth lens element having positive refractive power, whose object-side surface is convex and whose image-side surface is convex; a fifth lens having optical power, wherein the object side surface is convex and the image side surface is concave; a sixth lens having positive refractive power, whose object-side surface is convex and whose image-side surface is concave; The seventh lens element has a negative optical power, and its object side surface is concave and its image side surface is concave; Wherein, the axial distance TTL from the object side of the first lens to the imaging surface and half of the diagonal length of the effective pixel area on the imaging surface ImgH satisfy: 1.12≤TTL / ImgH≤1.21; The curvature radius R14 of the image side surface of the seventh lens, the curvature radius R13 of the object side surface of the seventh lens and the center thickness CT7 of the seventh lens on the optical axis satisfy: 1.82≤(R13+R14) / CT7≤3.21; An air interval T67 between the sixth lens and the seventh lens on the optical axis and a center thickness CT6 of the sixth lens on the optical axis satisfy: 2.1≤T67 / CT6≤2.

63.

2. The optical imaging lens according to claim 1, wherein: The effective focal length f of the optical imaging lens and the maximum field of view FOV of the optical imaging lens satisfy: 4.95mm≤f×tan(1 / 2FOV)≤6.01mm.

3. The optical imaging lens according to claim 1, wherein: The effective focal length f of the optical imaging lens and the entrance pupil diameter EPD of the optical imaging lens satisfy: 1.74≤f / EPD≤1.

87.

4. The optical imaging lens according to claim 1, wherein: The effective focal length f6 of the sixth lens, the curvature radius R12 of the image side surface of the sixth lens, and the curvature radius R11 of the object side surface of the sixth lens satisfy: 0.75≤f6 / (R11+R12)≤1.

37.

5. The optical imaging lens according to claim 1, wherein: The effective focal length f4 of the fourth lens and the effective focal length f1 of the first lens satisfy: 2.36≤f4 / f1≤3.

6. The optical imaging lens according to claim 1, wherein: The effective focal length f3 of the third lens and the effective focal length f7 of the seventh lens satisfy: 1.26≤(f3+f7) / (f3-f7)≤1.

31.

7. The optical imaging lens according to claim 1, wherein: The radius of curvature R4 of the image side surface of the second lens, the radius of curvature R3 of the object side surface of the second lens, the radius of curvature R2 of the image side surface of the first lens and the radius of curvature R1 of the object side surface of the first lens satisfy: 1.53≤(R3+R4) / (R1+R2)≤1.

96.

8. The optical imaging lens according to claim 1, wherein: A curvature radius R10 of the image-side surface of the fifth lens and a curvature radius R9 of the object-side surface of the fifth lens satisfy: 0.95≤R9 / R10≤1.

2.

9. The optical imaging lens according to claim 1, wherein: The combined focal length f12 of the first and second lenses, the center thickness CT1 of the first lens on the optical axis, and the center thickness CT2 of the second lens on the optical axis satisfy: 6.74≤f12 / (CT1+CT2)≤8.

48.

10. The optical imaging lens according to claim 1, wherein: The on-axis distance SAG51 between the intersection of the fifth lens object side and the optical axis to the effective radius vertex of the fifth lens object side, the on-axis distance SAG52 between the intersection of the fifth lens image side and the optical axis to the effective radius vertex of the fifth lens image side, the on-axis distance SAG41 between the intersection of the fourth lens object side and the optical axis to the effective radius vertex of the fourth lens object side, and the on-axis distance SAG42 between the intersection of the fourth lens image side and the optical axis to the effective radius vertex of the fourth lens image side satisfy: 1.82≤(SAG51+SAG52) / (SAG41+SAG42)≤2.

34.

11. The optical imaging lens according to claim 1, wherein: The on-axis distance SAG71 between the intersection of the object side of the seventh lens and the optical axis to the effective radius vertex of the object side of the seventh lens and the on-axis distance SAG61 between the intersection of the object side of the sixth lens and the optical axis to the effective radius vertex of the object side of the sixth lens satisfy: 1.89≤SAG71 / SAG61≤2.15.

Images