An optical imaging lens

Abstract

The present invention discloses an optical imaging lens. The optical imaging lens sequentially includes, 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 positive optical power; a fifth lens with optical power, whose object side is convex and image side is concave; a sixth lens with positive optical power, whose object side is convex and image side is convex; and a seventh lens with negative optical power. Wherein, half of the diagonal length of the effective pixel area on the imaging surface ImgH and the axial distance TTL from the object side of the first lens to the imaging surface satisfy: 4.0 mm < ImgH × ImgH / TTL < 6.0 mm. The optical imaging lens provided by the present invention can effectively balance the low-order aberrations of the system and reduce the sensitivity to tolerances by reasonably controlling the distribution of the optical powers of the various components of the system. By constraining the proportional relationship between the overall optical length and the half image height of the system, the characteristics of a large image surface and ultra-thin of the optical system are achieved, and it has a good imaging effect.

Description

Technical Field

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

[0002] With the improvement of the performance of photosensitive elements and the reduction of pixel sizes, higher requirements are put forward for corresponding optical imaging lenses. As a result, lenses with specifications such as large apertures, high pixels, and miniaturization have been developed, and it is required that the imaging system can clearly image scenes.

[0003] Therefore, in order to better meet the application requirements of the main camera on the next-generation high-end smartphones, an optical imaging system with a large image plane and a large aperture is needed. Summary of the Invention

[0004] The present invention aims to provide an optical imaging lens composed of seven lenses, having optical properties such as a large image plane and a large aperture.

[0005] One aspect of the present invention provides an optical imaging lens, which sequentially includes, from the object side to the image side along the optical axis: a first lens with a positive optical power; a second lens with an optical power; a third lens with an optical power; a fourth lens with a positive optical power; a fifth lens with an optical power, the object side of which is convex and the image side of which is concave; a sixth lens with a positive optical power, the object side of which is convex and the image side of which is convex; and a seventh lens with a negative optical power.

[0006] Wherein, half of the diagonal length of the effective pixel area on the imaging plane ImgH and the on-axis distance TTL from the object side of the first lens to the imaging plane satisfy: 4.0 mm < ImgH × ImgH / TTL < 6.0 mm; the effective focal length f of the optical imaging lens and the maximum field of view angle FOV of the optical imaging lens satisfy: 4.8 mm < f × tan(1 / 2 FOV) < 5.8 mm.

[0007] According to an embodiment of the present invention, the on-axis distance TTL from the object side of the first lens to the imaging plane and half of the diagonal length of the effective pixel area ImgH on the imaging plane satisfy: TTL / ImgH < 1.3.

[0008] According to an 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 < 1.7.

[0009] According to an embodiment of the present invention, 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: 2.0 < (R11 - R12) / f6 < 2.5.

[0010] According to one embodiment of the present invention, the effective focal length f1 of the first lens, the effective focal length f7 of the seventh lens, and the effective focal length f of the optical imaging lens satisfy: 1.4<(f1-f7) / f<1.8.

[0011] According to one embodiment of the present invention, the effective focal length f2 of the second lens, the curvature radius R4 of the image side surface of the second lens, and the curvature radius R3 of the object side surface of the second lens satisfy: 1.9 <f2 / (R4-R3)<7.1。

[0012] According to one embodiment of the present invention, a center thickness CT1 of the first lens on the optical axis, a center thickness CT2 of the second lens on the optical axis, a center thickness CT3 of the third lens on the optical axis, and a center thickness CT4 of the fourth lens on the optical axis satisfy: 1.4<(CT1+CT2) / (CT3+CT4)<2.2.

[0013] According to one embodiment of the present invention, the combined focal length f12 of the first and second lenses, the combined focal length f67 of the sixth and seventh lenses, and the combined focal length f34 of the third and fourth lenses satisfy: -1.0<(f12-f67) / f34<1.0.

[0014] According to one embodiment of the present invention, the on-axis distance SAG62 between the intersection of the image side surface of the sixth lens and the optical axis to the vertex of the effective radius of the image side surface of the sixth lens and the on-axis distance SAG52 between the intersection of the image side surface of the fifth lens and the optical axis to the vertex of the effective radius of the image side surface of the fifth lens satisfy: 1.6 <SAG62 / SAG52<2.4。

[0015] 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 edge thickness ET7 of the seventh lens satisfies: -3.6 <SAG71 / ET7<-1.3。

[0016] According to one embodiment of the present invention, the edge thickness ET4 of the fourth lens, the edge thickness ET5 of the fifth lens, and the edge thickness ET6 of the sixth lens satisfy the condition: 0.7<(ET4+ET5) / ET6<1.4.

[0017] Another aspect of 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 having positive optical power; a second lens having optical power; a third lens having optical power; a fourth lens having positive optical power; a fifth lens having optical power, the object side surface of which is convex and the image side surface of which is concave; a sixth lens having positive optical power, the object side surface of which is convex and the image side surface of which is convex; and a seventh lens having negative optical power.

[0018] Among them, each lens is independent of each other, and there is an air gap between the lenses on the optical axis; half of the diagonal length ImgH of the effective pixel area on the imaging surface and the on-axis distance TTL from the object side of the first lens to the imaging surface satisfy: 4.0 mm < ImgH × ImgH / TTL < 6.0 mm; the effective focal length f of the optical imaging lens and the entrance pupil diameter EPD of the optical imaging lens satisfy: f / EPD < 1.7.

[0019] Advantages 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. By reasonably controlling the distribution of the optical powers of the various components of the system, the low-order aberrations of the system can be effectively balanced, and the sensitivity to tolerances can be reduced. By restricting the proportional relationship between the overall optical length and the semi-image height of the system, the characteristics of a large image surface and ultra-thinness of the optical system can be achieved, enabling the system to have a good imaging effect. Description of the drawings

[0021] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following will briefly introduce the drawings required for the description of the embodiments. Obviously, the following drawings are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0022] Figure 1 It is a schematic diagram of the lens group structure of Embodiment 1 of the optical imaging lens of the present invention;

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

[0024] Figure 3 It is a 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 the axial chromatic aberration curve, astigmatism curve, distortion curve, and lateral chromatic aberration curve of Embodiment 2 of the optical imaging lens of the present invention;

[0026] Figure 5 It is a 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 the axial chromatic aberration curve, astigmatism curve, distortion curve, and lateral chromatic aberration curve of Embodiment 3 of the optical imaging lens of the present invention;

[0028] Figure 7 It is a 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 an axial chromatic aberration curve, an astigmatism curve, a distortion curve, and a magnification chromatic aberration curve of Example 5 of the optical imaging lens of the present invention;

[0032] Fig.11 Schematic diagram of the structure of a lens group of an optical imaging lens embodiment 6 of the present invention;

[0033] Figures 12a to 12d They are respectively an axial chromatic aberration curve, an astigmatism curve, a distortion curve, and a magnification chromatic aberration curve of Example 6 of the optical imaging lens of the present invention;

[0034] Fig.13 Schematic diagram of the structure of a lens group of an optical imaging lens embodiment 7 of the present invention;

[0035] Figures 14a to 14d They are respectively an axial chromatic aberration curve, an astigmatism curve, a distortion curve, and a magnification chromatic aberration curve of Example 7 of the optical imaging lens of the present invention;

[0036] Fig.15 Schematic diagram of the lens group structure of Embodiment 8 of the optical imaging lens of the present invention;

[0037] Figures 16a to 16d 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 8 of the present invention. DETAILED DESCRIPTION

[0038] 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.

[0039] 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.

[0040] 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.

[0041] 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.

[0042] 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.

[0043] 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.

[0044] It should be noted that, in the absence of conflict, the embodiments of the present invention and the features in the embodiments can 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 combination with the embodiments.

[0045] Exemplary Embodiments

[0046] The optical imaging lens of an exemplary embodiment of the present invention includes seven lenses, which include, in order 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, wherein each lens is independent of each other and has an air gap between each lens on the optical axis.

[0047] In the present 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 has a positive optical power; the fifth lens may have a positive optical power or a negative optical power, with its object side being convex and its image side being concave; the sixth lens has a positive optical power, with its object side being convex and its image side being convex; the seventh lens has a negative optical power. By reasonably controlling the distribution of the optical powers of the various components of the system, the low-order aberrations of the system can be effectively balanced, and the sensitivity to tolerances can be reduced.

[0048] In the present exemplary embodiment, the conditional formula satisfied by half of the diagonal length ImgH of the effective pixel region on the imaging surface and the on-axis distance TTL from the object side of the first lens to the imaging surface is: 4.0 mm < ImgH × ImgH / TTL < 6.0 mm. By constraining the proportional relationship between the overall optical length and the half image height of the system, the characteristics of a large imaging surface and ultra-thinness of the optical system are achieved, enabling the system to have good imaging effects. More specifically, ImgH and TTL satisfy: 4.09 mm ≤ ImgH × ImgH / TTL ≤ 4.12 mm.

[0049] In the present exemplary embodiment, the conditional formula satisfied by the on-axis distance TTL from the object side of the first lens to the imaging surface and half of the diagonal length ImgH of the effective pixel region on the imaging surface is: TTL / ImgH < 1.3. By constraining the ratio of the overall optical length and the half image height of the system within a certain range, the characteristics of ultra-thinness and high pixels of the optical imaging system are achieved. More specifically, TTL and ImgH satisfy: 1.26 ≤ TTL / ImgH ≤ 1.27.

[0050] In the present exemplary embodiment, the conditional formula satisfied by the effective focal length f of the optical imaging lens and the maximum field of view FOV of the optical imaging lens is: 4.8 mm < f × tan(1 / 2 FOV) < 5.8 mm. By constraining the relationship between the effective focal length and the field of view, the size of the imaging surface of the optical system is controlled. More specifically, f and FOV satisfy: 4.97 mm ≤ f × tan(1 / 2 FOV) ≤ 5.01 mm.

[0051] In the present exemplary embodiment, the conditional formula satisfied by the effective focal length f of the optical imaging lens and the entrance pupil diameter EPD of the optical imaging lens is: f / EPD < 1.7. By constraining the ratio of the effective focal length and the entrance pupil diameter, the aperture of the optical system is further controlled to achieve the characteristic of a large aperture. More specifically, f and EPD satisfy: f / EPD = 1.65.

[0052] In this exemplary embodiment, the conditional formula satisfied by 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 is: 2.0 < (R11 - R12) / f6 < 2.5. By controlling the ratio of the radii of curvature of the object and image side surfaces of the sixth lens to the effective focal length, the deflection angle of the marginal rays of the system can be reasonably controlled, ensuring that the optical lens has good processability and reducing the system sensitivity. More specifically, R11, R12, and f6 satisfy: 2.10 ≤ (R11 - R12) / f6 ≤ 2.32.

[0053] In this exemplary embodiment, the conditional formula satisfied by the effective focal length f1 of the first lens, the effective focal length f7 of the seventh lens, and the effective focal length f of the optical imaging lens is: 1.4 < (f1 - f7) / f < 1.8. By controlling the effective focal lengths of the first lens and the seventh lens, the contribution of their aberrations to the entire optical system can be controlled, balancing the off-axis aberrations of the system, thereby improving the imaging quality of the system. More specifically, f1, f7, and f satisfy: 1.52 ≤ (f1 - f7) / f ≤ 1.61.

[0054] In this exemplary embodiment, the conditional formula satisfied by the effective focal length f2 of the second lens, the radius of curvature R4 of the image side surface of the second lens, and the radius of curvature R3 of the object side surface of the second lens is: 1.9 < f2 / (R4 - R3) < 7.1. By controlling the ratio of the effective focal length of the second lens to the radii of curvature of the object and image side surfaces within a reasonable range, the sensitivity of the front-end lens is reduced, ensuring processability while improving the yield. More specifically, f2, R4, and R3 satisfy: 1.93 ≤ f2 / (R4 - R3) ≤ 6.98.

[0055] In this exemplary embodiment, the conditional formula satisfied by the central thickness CT1 of the first lens on the optical axis, the central thickness CT2 of the second lens on the optical axis, the central thickness CT3 of the third lens on the optical axis, and the central thickness CT4 of the fourth lens on the optical axis is: 1.4 < (CT1 + CT2) / (CT3 + CT4) < 2.2. By restricting the central thicknesses of the first four lenses at the front and back, the contribution of the field curvature of each field of view of the system is controlled within a reasonable range to balance the field curvature generated by other lenses, effectively improving the lens resolution. More specifically, CT1, CT2, CT3, and CT4 satisfy: 1.58 ≤ (CT1 + CT2) / (CT3 + CT4) ≤ 2.07.

[0056] In the present exemplary embodiment, the conditional expressions satisfied by the combined focal lengths f12 of the first and second lenses, the combined focal lengths f67 of the sixth and seventh lenses, and the combined focal lengths f34 of the third and fourth lenses are: -1.0 < (f12 - f67) / f34 < 1.0. By constraining the focal length relationships of the respective lenses, the optical power of the optical system is reasonably distributed to meet the characteristics of high imaging quality, low sensitivity, and easy processing and molding. More specifically, f12, f67, and f34 satisfy: -0.65 ≤ (f12 - f67) / f34 ≤ 0.49.

[0057] In the present exemplary embodiment, the conditional expression satisfied by the axial distance SAG62 between the intersection of the image side surface of the sixth lens and the optical axis and the vertex of the effective radius of the image side surface of the sixth lens and 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 is: 1.6 < SAG62 / SAG52 < 2.4. By controlling the ratio of the sag heights of the sixth lens and the fifth lens, the uniformity of the excessive lens shape is reasonably constrained. At the same time, the eccentricity and tilt sensitivity of the fifth and sixth lenses are reduced, which also brings great benefits to the distortion of the optical system and is conducive to realizing mass production. More specifically, SAG62 and SAG52 satisfy: 1.80 ≤ SAG62 / SAG52 ≤ 2.26.

[0058] In the present exemplary embodiment, the conditional expression satisfied by 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 edge thickness ET7 of the seventh lens is: -3.6 < SAG71 / ET7 < -1.3. By controlling the ratio of the sag height to the edge thickness of the seventh lens, the difficulty of lens forming, coating, and assembly can be reduced. At the same time, the risk of welding marks is also avoided, and the assembly yield is improved. More specifically, SAG71 and ET7 satisfy: -3.55 ≤ SAG71 / ET7 ≤ -1.38.

[0059] In the present exemplary embodiment, the conditional expression satisfied by the edge thickness ET4 of the fourth lens, the edge thickness ET5 of the fifth lens, and the edge thickness ET6 of the sixth lens is: 0.7 < (ET4 + ET5) / ET6 < 1.4. By constraining the edge thicknesses of the fourth, fifth, and sixth lenses, the rationality of the lens shape is controlled, the system field curvature is balanced, and the ability to correct aberrations is improved. More specifically, ET4, ET5, and ET6 satisfy: 0.82 ≤ (ET4 + ET5) / ET6 ≤ 1.19.

[0060] In the present exemplary embodiment, the above optical imaging lens may further include a diaphragm. The diaphragm can be disposed at an appropriate position as needed. For example, the diaphragm can be disposed between the object side and the first lens. Optionally, the above optical imaging lens may further include a filter for correcting color deviation and / or a protective glass for protecting the photosensitive element located on the imaging surface.

[0061] 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.

[0062] 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.

[0063] 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.

[0064] 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

[0066] 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.

[0067] 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 concave, 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 convex. 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.

[0068] 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).

[0069] Face number Surface type Radius of curvature Thickness / distance focal length Refractive Index Dispersion coefficient Cone coefficient OBJ Spherical endless endless STO Spherical endless -0.7000 S1 Aspheric 2.2708 0.9051 5.14 1.54 56.1 -0.0944 S2 Aspheric 10.2546 0.0361 12.5136 S3 Aspheric 8.0365 0.3020 -16.33 1.67 19.2 -8.3655 S4 Aspheric 4.5850 0.4901 -0.8218 S5 Aspheric -434.7826 0.2882 -29.71 1.67 19.2 -35.4008 S6 Aspheric 21.1172 0.0552 0.0000 S7 Aspheric 26.4199 0.4773 21.34 1.54 56.1 0.0000 S8 Aspheric -20.6787 0.4837 0.0000 S9 Aspheric 4.5545 0.4090 78.13 1.57 37.3 -2.2132 S10 Aspheric 4.9075 0.4476 -1.8261 S11 Aspheric 6.6125 0.7539 5.72 1.54 55.7 -5.8917 S12 Aspheric -5.4989 0.5735 -0.0736 S13 Aspheric -3.1767 0.5467 -3.33 1.54 55.7 -0.9981 S14 Aspheric 4.3332 0.2939 -0.0727 S15 Spherical endless 0.2100 1.52 64.2 S16 Spherical endless 0.3260 S17 Spherical endless

[0070] Table 1

[0071] As shown in Table 2, in Example 1, the total effective focal length of the optical imaging lens is f=5.41 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=5.20 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.

[0072]

[0073] Table 2

[0074] The optical imaging lens in Example 1 satisfies:

[0075] ImgH×ImgH / TTL=4.10mm, where ImgH is half of the diagonal length of the effective pixel area on the imaging plane, and TTL is the axial distance from the object side of the first lens to the imaging plane;

[0076] TTL / ImgH=1.27, 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;

[0077] f×tan(1 / 2FOV)=4.97mm, 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;

[0078] f / EPD=1.65, where f is the effective focal length of the optical imaging lens and EPD is the entrance pupil diameter of the optical imaging lens;

[0079] (R11-R12) / f6=2.12, where R11 is the radius of curvature of the object side of the sixth lens, R12 is the radius of curvature of the image side of the sixth lens, and f6 is the effective focal length of the sixth lens;

[0080] (f1-f7) / f=1.57, where f1 is the effective focal length of the first lens, f7 is the effective focal length of the seventh lens, and f is the effective focal length of the optical imaging lens;

[0081] f2 / (R4-R3)=4.73, where f2 is the effective focal length of the second lens, R4 is the radius of curvature of the image side of the second lens, and R3 is the radius of curvature of the object side of the second lens;

[0082] (CT1+CT2) / (CT3+CT4)=1.58, where CT1 is the center thickness of the first lens on the optical axis, CT2 is the center thickness of the second lens on the optical axis, CT3 is the center thickness of the third lens on the optical axis, and CT4 is the center thickness of the fourth lens on the optical axis;

[0083] (f12-f67) / f34=0.27, where f12 is the combined focal length of the first and second lenses, f67 is the combined focal length of the sixth and seventh lenses, and f34 is the combined focal length of the third and fourth lenses;

[0084] SAG62 / SAG52=2.08, wherein SAG62 is the on-axis distance between the intersection of the image side surface of the sixth lens and the optical axis to the vertex of the effective radius of the image side surface of the sixth lens, and SAG52 is the on-axis distance between the intersection of the image side surface of the fifth lens and the optical axis to the vertex of the effective radius of the image side surface of the fifth lens;

[0085] SAG71 / ET7=-1.69, where SAG71 is the axial distance 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 ET7 is the edge thickness of the seventh lens;

[0086] (ET4+ET5) / ET6=1.01, wherein ET4 is the edge thickness of the fourth lens, ET5 is the edge thickness of the fifth lens, and ET6 is the edge thickness of the sixth lens.

[0087] 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:

[0088]

[0089] 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.

[0090] 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 A of the aspherical mirror surfaces S1-S14 that can be used in Example 1. 4 , A 6 , A 8 , A 10 , A 12 , A 14 , A 16 , A 18 , A 20 , A 22 , A 24 , A 26 , A 28 and A 30 .

[0091] Face number A4 A6 A8 A10 A12 A14 A16 S1 -3.7898E-04 1.4216E-02 -5.3899E-02 1.4296E-01 -2.5372E-01 3.0498E-01 -2.4922E-01 S2 -4.6304E-02 4.1196E-02 6.7586E-02 -3.0289E-01 5.5216E-01 -6.1915E-01 4.5348E-01 S3 -4.5633E-02 5.5103E-02 7.6075E-03 -1.1269E-01 1.8798E-01 -2.2031E-01 2.8804E-01 S4 -6.0378E-03 2.1714E-04 1.0215E-01 -3.8068E-01 8.0485E-01 -1.1046E+00 1.0338E+00 S5 -3.8954E-02 2.7754E-02 -1.0719E-01 2.2125E-01 -3.2215E-01 3.6809E-01 -3.7672E-01 S6 -6.4197E-02 1.0986E-01 -2.5383E-01 3.7295E-01 -3.8515E-01 3.0680E-01 -2.1890E-01 S7 -7.0349E-02 1.8868E-01 -6.2166E-01 1.7008E+00 -3.6836E+00 5.9898E+00 -7.1789E+00 S8 -5.1340E-02 3.7793E-02 -7.9437E-04 -1.9800E-01 6.3951E-01 -1.1762E+00 1.4454E+00 S9 -7.5107E-02 6.8550E-02 -1.6470E-01 3.3740E-01 -4.9734E-01 5.1963E-01 -3.9096E-01 S10 -7.2618E-02 3.1295E-02 -3.8731E-02 4.8683E-02 -4.5664E-02 3.0206E-02 -1.4301E-02 S11 -1.6429E-02 -1.1570E-02 9.5047E-03 -8.6859E-03 6.4240E-03 -3.1194E-03 9.8004E-04 S12 2.6461E-02 -2.7978E-02 2.7146E-02 -2.5240E-02 1.6318E-02 -6.8058E-03 1.8894E-03 S13 -3.5033E-02 1.2021E-02 -8.1917E-03 4.3938E-03 -1.1228E-03 1.4033E-04 -4.5216E-06 S14 -4.5837E-02 8.5437E-03 5.5898E-05 -8.4486E-04 3.6027E-04 -8.8231E-05 1.4409E-05 Face number A18 A20 A22 A24 A26 A28 A30 S1 1.3651E-01 -4.7413E-02 8.5149E-03 2.2531E-04 -4.6579E-04 9.2029E-05 -6.3156E-06 S2 -2.1223E-01 5.4912E-02 -1.4827E-03 -4.0630E-03 1.3773E-03 -2.0120E-04 1.1621E-05 S3 -3.8140E-01 3.7818E-01 -2.5178E-01 1.0914E-01 -2.9610E-02 4.5736E-03 -3.0732E-04 S4 -6.8544E-01 3.4225E-01 -1.4148E-01 5.1022E-02 -1.4530E-02 2.6323E-03 -2.1372E-04 S5 3.7635E-01 -3.4099E-01 2.4498E-01 -1.2629E-01 4.3018E-02 -8.6019E-03 7.6143E-04 S6 1.6267E-01 -1.1356E-01 6.1245E-02 -2.3049E-02 5.7162E-03 -8.5127E-04 5.8282E-05 S7 6.3155E+00 -4.0554E+00 1.8753E+00 -6.0759E-01 1.3086E-01 -1.6829E-02 9.7769E-04 S8 -1.2457E+00 7.6509E-01 -3.3381E-01 1.0119E-01 -2.0271E-02 2.4134E-03 -1.2929E-04 S9 2.1380E-01 -8.4938E-02 2.4233E-02 -4.8322E-03 6.3867E-04 -5.0216E-05 1.7760E-06 S10 4.8965E-03 -1.2068E-03 2.1087E-04 -2.5411E-05 2.0070E-06 -9.3583E-08 1.9563E-09 S11 -2.0584E-04 2.9777E-05 -3.0102E-06 2.1134E-07 -9.9272E-09 2.8305E-10 -3.7255E-12 S12 -3.6064E-04 4.8143E-05 -4.4960E-06 2.8825E-07 -1.2102E-08 2.9998E-10 -3.3313E-12 S13 -1.2143E-06 2.1289E-07 -1.7596E-08 8.7687E-10 -2.6905E-11 4.7090E-13 -3.6143E-15 S14 -1.6436E-06 1.3318E-07 -7.6552E-09 3.0566E-10 -8.0719E-12 1.2689E-13 -8.9964E-16

[0092] Table 3

[0093] 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

[0095] 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.

[0096] 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 concave. 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 convex. 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.

[0097] 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).

[0098] Face number Surface type Radius of curvature Thickness / distance focal length Refractive Index Dispersion coefficient Cone coefficient OBJ Spherical endless endless STO Spherical endless -0.6950 S1 Aspheric 2.2772 0.9550 5.13 1.54 56.1 -0.1312 S2 Aspheric 10.3732 0.0345 16.9219 S3 Aspheric 8.7338 0.3021 -15.53 1.67 19.2 -12.6914 S4 Aspheric 4.7059 0.4590 -2.2739 S5 Aspheric 19.0488 0.2424 -32.65 1.67 19.2 7.4089 S6 Aspheric 10.1825 0.0597 0.0000 S7 Aspheric 13.1530 0.4770 24.52 1.54 56.1 0.0000 S8 Aspheric 769.2308 0.4161 0.0000 S9 Aspheric 4.5146 0.3732 63.12 1.57 37.3 -3.3074 S10 Aspheric 5.0069 0.5402 -0.0348 S11 Aspheric 6.5217 0.8193 5.69 1.54 55.7 -4.6534 S12 Aspheric -5.4881 0.5604 -0.2397 S13 Aspheric -3.0805 0.5763 -3.33 1.54 55.7 -1.1778 S14 Aspheric 4.5395 0.2712 -0.2734 S15 Spherical endless 0.2100 1.52 64.2 S16 Spherical endless 0.3020 S17 Spherical endless

[0099] Table 4

[0100] As shown in Table 5, in Example 2, the total effective focal length of the optical imaging lens is f=5.41 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=5.20 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.

[0101]

[0102]

[0103] Table 5

[0104] In Example 2, the object side surface and the image side surface of any lens from the first lens E1 to the seventh lens E7 are aspherical surfaces, and the high-order coefficient A of each aspherical mirror surface S1-S14 that can be used in Example 2 is shown. 4 , A 6 , A 8 , A 10 , A 12 , A 14 , A 16 , A 18 , A 20 , A 22 , A 24 , A 26 , A 28 and A30 .

[0105] Face number A4 A6 A8 A10 A12 A14 A16 S1 -3.6880E-04 1.3647E-02 -5.1041E-02 1.3355E-01 -2.3381E-01 2.7725E-01 -2.2349E-01 S2 -4.4117E-02 3.8311E-02 6.1351E-02 -2.6838E-01 4.7756E-01 -5.2269E-01 3.7368E-01 S3 -4.3933E-02 5.2053E-02 7.0512E-03 -1.0248E-01 1.6774E-01 -1.9290E-01 2.4745E-01 S4 -5.6282E-03 1.9543E-04 8.8763E-02 -3.1937E-01 6.5191E-01 -8.6381E-01 7.8053E-01 S5 -3.5929E-02 2.4584E-02 -9.1192E-02 1.8077E-01 -2.5278E-01 2.7738E-01 -2.7264E-01 S6 -6.1350E-02 1.0263E-01 -2.3181E-01 3.3297E-01 -3.3614E-01 2.6175E-01 -1.8257E-01 S7 -6.9458E-02 1.8511E-01 -6.0603E-01 1.6475E+00 -3.5455E+00 5.7286E+00 -6.8223E+00 S8 -5.1432E-02 3.7895E-02 -7.9722E-04 -1.9889E-01 6.4297E-01 -1.1836E+00 1.4558E+00 S9 -8.9945E-02 8.9835E-02 -2.3620E-01 5.2951E-01 -8.5415E-01 9.7662E-01 -8.0411E-01 S10 -8.4947E-02 3.9594E-02 -5.2999E-02 7.2050E-02 -7.3095E-02 5.2294E-02 -2.6778E-02 S11 -1.4675E-02 -9.7666E-03 7.5828E-03 -6.5491E-03 4.5777E-03 -2.1008E-03 6.2378E-04 S12 2.3064E-02 -2.2768E-02 2.0624E-02 -1.7903E-02 1.0806E-02 -4.2077E-03 1.0906E-03 S13 -3.2277E-02 1.0631E-02 -6.9534E-03 3.5799E-03 -8.7805E-04 1.0534E-04 -3.2579E-06 S14 -3.9334E-02 6.2808E-03 3.8171E-04 -6.4513E-04 2.1328E-04 -4.0942E-05 5.1651E-06 Face number A18 A20 A22 A24 A26 A28 A30 S1 1.2076E-01 -4.1375E-02 7.3301E-03 1.9134E-04 -3.9020E-04 7.6052E-05 -5.1485E-06 S2 -1.7070E-01 4.3112E-02 -1.1362E-03 -3.0392E-03 1.0056E-03 -1.4339E-04 8.0843E-06 S3 -3.2150E-01 3.1279E-01 -2.0433E-01 8.6903E-02 -2.3135E-02 3.5061E-03 -2.3117E-04 S4 -4.9967E-01 2.4088E-01 -9.6136E-02 3.3474E-02 -9.2034E-03 1.6098E-03 -1.2619E-04 S5 2.6158E-01 -2.2762E-01 1.5705E-01 -7.7757E-02 2.5436E-02 -4.8848E-03 4.1527E-04 S6 1.3263E-01 -9.0514E-02 4.7721E-02 -1.7556E-02 4.2564E-03 -6.1966E-04 4.1474E-05 S7 5.9637E+00 -3.8052E+00 1.7484E+00 -5.6288E-01 1.2047E-01 -1.5393E-02 8.8861E-04 S8 -1.2558E+00 7.7199E-01 -3.3713E-01 1.0228E-01 -2.0509E-02 2.4439E-03 -1.3105E-04 S9 4.8120E-01 -2.0921E-01 6.5316E-02 -1.4253E-02 2.0616E-03 -1.7738E-04 6.8654E-06 S10 9.9164E-03 -2.6434E-03 4.9955E-04 -6.5110E-05 5.5619E-06 -2.8049E-07 6.3416E-09 S11 -1.2382E-04 1.6928E-05 -1.6173E-06 1.0731E-07 -4.7641E-09 1.2838E-10 -1.5969E-12 S12 -1.9434E-04 2.4221E-05 -2.1119E-06 1.2641E-07 -4.9549E-09 1.1466E-10 -1.1888E-12 S13 -8.3979E-07 1.4132E-07 -1.1212E-08 5.3630E-10 -1.5795E-11 2.6534E-13 -1.9549E-15 S14 -4.4464E-07 2.6292E-08 -1.0455E-09 2.6184E-11 -3.4382E-13 7.0894E-16 2.4076E-17

[0106] Table 6

[0107] 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

[0109] 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.

[0110] 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 positive 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 concave, 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 convex. 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.

[0111] 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).

[0112] Face number Surface type Radius of curvature Thickness / distance focal length Refractive Index Dispersion coefficient Cone coefficient OBJ Spherical endless endless STO Spherical endless -0.7320 S1 Aspheric 2.2087 1.1201 4.89 1.54 56.1 -0.1043 S2 Aspheric 10.5048 0.0357 10.9445 S3 Aspheric 11.0424 0.3200 -12.24 1.67 19.2 15.1440 S4 Aspheric 4.6819 0.3614 3.5985 S5 Aspheric 14.5825 0.2251 111.00 1.67 19.2 -90.0000 S6 Aspheric 17.9768 0.1249 0.0000 S7 Aspheric -58.2257 0.4715 52.97 1.54 56.1 0.0000 S8 Aspheric -19.3667 0.4667 0.0000 S9 Aspheric 5.1030 0.3926 73.80 1.57 37.3 -5.4950 S10 Aspheric 5.6447 0.5201 -1.5728 S11 Aspheric 9.1374 0.7032 6.05 1.54 55.7 -0.5099 S12 Aspheric -4.8966 0.5260 -1.1581 S13 Aspheric -3.1598 0.5678 -3.34 1.54 55.7 -1.0000 S14 Aspheric 4.4065 0.2468 -0.0518 S15 Spherical endless 0.2100 1.52 64.2 S16 Spherical endless 0.2669 S17 Spherical endless

[0113] Table 7

[0114] As shown in Table 8, in Example 3, the total effective focal length of the optical imaging lens is f=5.41 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 6.56 mm, and half of the diagonal length of the effective pixel area on the imaging surface S17 is ImgH=5.20 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.

[0115]

[0116] Table 8

[0117] 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 A of the aspherical mirror surfaces S1-S14 that can be used in Example 3. 4 , A 6 , A 8 , A 10 , A 12 , A 14 , A 16 , A 18 , A 20 , A 22 , A 24 , A 26 , A 28 and A 30 .

[0118]

[0119]

[0120] Table 9

[0121] 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

[0123] Figure 7Schematic 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.

[0124] 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 convex. 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.

[0125] 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).

[0126]

[0127]

[0128] Table 10

[0129] As shown in Table 11, in Example 4, the total effective focal length of the optical imaging lens is f=5.42 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 6.61 mm, and half of the diagonal length of the effective pixel area on the imaging surface S17 is ImgH=5.20 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.

[0130]

[0131] Table 11

[0132] 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 A of the aspherical mirror surfaces S1 to S14 that can be used in Example 4. 4 , A 6 , A 8 , A 10, A 12 , A 14 , A 16 , A 18 , A 20 , A 22 , A 24 , A 26 , A 28 and A 30 .

[0133]

[0134]

[0135] Table 12

[0136] 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

[0138] Fig. 9 2 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.

[0139] 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 concave, 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 convex. 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.

[0140] 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).

[0141]

[0142]

[0143] Table 13

[0144] As shown in Table 14, in Example 5, the total effective focal length of the optical imaging lens is f=5.42 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 6.61 mm, and half of the diagonal length of the effective pixel area on the imaging surface S17 is ImgH=5.20 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.

[0145]

[0146] Table 14

[0147] 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 A of the aspherical mirror surfaces S1 to S14 that can be used in Example 5. 4 , A 6 , A 8 , A 10 , A 12 , A 14 , A 16 , A 18 , A 20 , A 22 , A 24 , A 26 , A 28 and A30 .

[0148]

[0149]

[0150] Table 15

[0151] 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. Specific embodiment 6

[0153] Fig.11 Schematic diagram of the lens group structure of embodiment 6 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.

[0154] 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 concave, and its image side surface S6 is convex. The fourth lens E4 has positive power, and its object side surface S7 is concave, 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 convex. 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.

[0155] As shown in Table 16, it is a basic parameter table of the optical imaging lens of Example 6, wherein the units of the radius of curvature, thickness, and focal length are all millimeters (mm).

[0156] Face number Surface type Radius of curvature Thickness / distance focal length Refractive Index Dispersion coefficient Cone coefficient OBJ Spherical endless endless STO Spherical endless -0.7300 S1 Aspheric 2.2369 0.9921 5.25 1.54 56.1 -0.0541 S2 Aspheric 8.6354 0.0342 0.4993 S3 Aspheric 6.8504 0.2599 -17.79 1.67 19.2 -0.1557 S4 Aspheric 4.3010 0.5170 3.1767 S5 Aspheric -32.9068 0.2543 -53.32 1.67 19.2 90.0000 S6 Aspheric -370.3704 0.0677 0.0000 S7 Aspheric -85.3314 0.3800 27.76 1.54 56.1 0.0000 S8 Aspheric -12.8826 0.4910 0.0000 S9 Aspheric 4.3493 0.4104 114.87 1.57 37.3 -8.0637 S10 Aspheric 4.4989 0.4808 -6.9874 S11 Aspheric 7.4888 0.8173 6.12 1.54 55.7 -4.3059 S12 Aspheric -5.6351 0.5834 -0.5814 S13 Aspheric -3.2492 0.5749 -3.43 1.54 55.7 -1.2143 S14 Aspheric 4.4972 0.2484 -0.0641 S15 Spherical endless 0.2100 1.52 64.2 S16 Spherical endless 0.2685 S17 Spherical endless

[0157] Table 16

[0158] As shown in Table 17, in Example 6, the total effective focal length of the optical imaging lens is f=5.42 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 6.59 mm, and half of the diagonal length of the effective pixel area on the imaging surface S17 is ImgH=5.20 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.

[0159]

[0160] Table 17

[0161] In Example 6, 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 18 shows the high-order coefficients A of the aspherical mirror surfaces S1 to S14 that can be used in Example 6. 4 , A 6 , A 8 , A 10 , A 12 , A 14 , A 16 , A 18 , A 20 , A 22 , A 24 , A 26 , A 28 and A 30 .

[0162] Face number A4 A6 A8 A10 A12 A14 A16 S1 -3.3620E-04 1.1878E-02 -4.2416E-02 1.0596E-01 -1.7713E-01 2.0054E-01 -1.5434E-01 S2 -4.5960E-02 4.0737E-02 6.6585E-02 -2.9730E-01 5.3994E-01 -6.0320E-01 4.4015E-01 S3 -4.6643E-02 5.6944E-02 7.9482E-03 -1.1903E-01 2.0075E-01 -2.3787E-01 3.1442E-01 S4 -6.6421E-03 2.5054E-04 1.2362E-01 -4.8320E-01 1.0715E+00 -1.5424E+00 1.5140E+00 S5 -3.7639E-02 2.6360E-02 -1.0008E-01 2.0305E-01 -2.9061E-01 3.2640E-01 -3.2837E-01 S6 -6.1542E-02 1.0311E-01 -2.3326E-01 3.3557E-01 -3.3930E-01 2.6463E-01 -1.8486E-01 S7 -6.4595E-02 1.6601E-01 -5.2413E-01 1.3740E+00 -2.8516E+00 4.4433E+00 -5.1029E+00 S8 -5.0947E-02 3.7360E-02 -7.8227E-04 -1.9424E-01 6.2496E-01 -1.1450E+00 1.4017E+00 S9 -6.2549E-02 5.2097E-02 -1.1422E-01 2.1354E-01 -2.8725E-01 2.7389E-01 -1.8805E-01 S10 -5.9421E-02 2.3164E-02 -2.5933E-02 2.9486E-02 -2.5018E-02 1.4970E-02 -6.4113E-03 S11 -1.4191E-02 -9.2881E-03 7.0916E-03 -6.0232E-03 4.1402E-03 -1.8684E-03 5.4558E-04 S12 2.1894E-02 -2.1058E-02 1.8585E-02 -1.5718E-02 9.2438E-03 -3.5070E-03 8.8559E-04 S13 -2.9120E-02 9.1101E-03 -5.6597E-03 2.7677E-03 -6.4479E-04 7.3475E-05 -2.1584E-06 S14 -3.6589E-02 4.1294E-03 1.3290E-03 -1.0152E-03 3.3973E-04 -7.3133E-05 1.0861E-05 Face number A18 A20 A22 A24 A26 A28 A30 S1 7.9628E-02 -2.6048E-02 4.4061E-03 1.0981E-04 -2.1381E-04 3.9789E-05 -2.5718E-06 S2 -2.0522E-01 5.2902E-02 -1.4231E-03 -3.8851E-03 1.3121E-03 -1.9096E-04 1.0989E-05 S3 -4.2092E-01 4.2197E-01 -2.8402E-01 1.2447E-01 -3.4142E-02 5.3317E-03 -3.6221E-04 S4 -1.0529E+00 5.5142E-01 -2.3907E-01 9.0432E-02 -2.7010E-02 5.1324E-03 -4.3707E-04 S5 3.2246E-01 -2.8719E-01 2.0282E-01 -1.0278E-01 3.4412E-02 -6.7639E-03 5.8854E-04 S6 1.3451E-01 -9.1938E-02 4.8547E-02 -1.7888E-02 4.3436E-03 -6.3334E-04 4.2456E-05 S7 4.3017E+00 -2.6469E+00 1.1729E+00 -3.6413E-01 7.5150E-02 -9.2605E-03 5.1553E-04 S8 -1.2034E+00 7.3630E-01 -3.2002E-01 9.6638E-02 -1.9285E-02 2.2872E-03 -1.2207E-04 S9 9.3847E-02 -3.4024E-02 8.8584E-03 -1.6120E-03 1.9443E-04 -1.3951E-05 4.5028E-07 S10 1.9857E-03 -4.4271E-04 6.9974E-05 -7.6278E-06 5.4497E-07 -2.2986E-08 4.3465E-10 S11 -1.0650E-04 1.4319E-05 -1.3453E-06 8.7780E-08 -3.8323E-09 1.0155E-10 -1.2423E-12 S12 -1.5376E-04 1.8671E-05 -1.5861E-06 9.2500E-08 -3.5326E-09 7.9651E-11 -8.0461E-13 S13 -5.2847E-07 8.4470E-08 -6.3655E-09 2.8920E-10 -8.0903E-12 1.2909E-13 -9.0336E-16 S14 -1.1425E-06 8.5954E-08 -4.6013E-09 1.7133E-10 -4.2202E-12 6.1856E-14 -4.0864E-16

[0163] Table 18

[0164] Fig.12a The axial chromatic aberration curve of the optical imaging lens of Example 6 is shown, which indicates the deviation of light of different wavelengths from the focal point behind the lens. Figure 12b The astigmatism curve of the optical imaging lens of Example 6 is shown, which represents the meridional image curvature and the sagittal image curvature. Fig.12c The distortion curve of the optical imaging lens of Example 6 is shown, which represents the distortion magnitude values ​​corresponding to different image heights. Fig.12d The magnification chromatic aberration curve of the optical imaging lens of Example 6 is shown, which represents the deviation of different image heights on the imaging surface after the light passes through the lens. Figures 12a to 12d It can be seen from the figure that the optical imaging lens provided in Example 6 can achieve good imaging quality. Specific embodiment 7

[0166] Fig.132 is a schematic diagram of the lens group structure of Embodiment 7 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.

[0167] 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 concave, and its image side surface S6 is convex. The fourth lens E4 has positive power, and its object side surface S7 is concave, 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 convex. 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.

[0168] As shown in Table 19, it is a basic parameter table of the optical imaging lens of Example 7, wherein the units of the radius of curvature, thickness, and focal length are all millimeters (mm).

[0169] Face number Surface type Radius of curvature Thickness / distance focal length Refractive Index Dispersion coefficient Cone coefficient OBJ Spherical endless endless STO Spherical endless -0.7200 S1 Aspheric 2.2415 0.9871 5.24 1.54 56.1 -0.0522 S2 Aspheric 8.7638 0.0340 1.0146 S3 Aspheric 7.0647 0.2583 -18.05 1.67 19.2 0.2319 S4 Aspheric 4.4117 0.5221 3.4391 S5 Aspheric -33.4712 0.2398 -54.32 1.67 19.2 90.0000 S6 Aspheric -370.3704 0.0680 0.0000 S7 Aspheric -52.1052 0.3800 27.28 1.54 56.1 0.0000 S8 Aspheric -11.6043 0.5220 0.0000 S9 Aspheric 4.3084 0.4149 -129.81 1.57 37.3 -11.1222 S10 Aspheric 3.9291 0.4214 -10.7588 S11 Aspheric 5.8934 0.8426 5.88 1.54 55.7 -12.6195 S12 Aspheric -6.4522 0.6226 1.0353 S13 Aspheric -3.3019 0.5665 -3.49 1.54 55.7 -1.1909 S14 Aspheric 4.5921 0.2403 -0.0692 S15 Spherical endless 0.2100 1.52 64.2 S16 Spherical endless 0.2604 S17 Spherical endless

[0170] Table 19

[0171] As shown in Table 20, in Example 7, the total effective focal length of the optical imaging lens is f=5.43 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 6.59 mm, and half of the diagonal length of the effective pixel area on the imaging surface S17 is ImgH=5.20 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.

[0172]

[0173]

[0174] Table 20

[0175] In Example 7, 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 21 shows the high-order coefficients A of the aspherical mirror surfaces S1 to S14 that can be used in Example 7. 4 , A 6 , A 8 , A 10, A 12 , A 14 , A 16 , A 18 , A 20 , A 22 , A 24 , A 26 , A 28 and A 30 .

[0176] Face number A4 A6 A8 A10 A12 A14 A16 S1 -3.4265E-04 1.2222E-02 -4.4061E-02 1.1112E-01 -1.8753E-01 2.1434E-01 -1.6655E-01 S2 -4.6483E-02 4.1434E-02 6.8108E-02 -3.0582E-01 5.5857E-01 -6.2754E-01 4.6052E-01 S3 -4.6918E-02 5.7448E-02 8.0421E-03 -1.2079E-01 2.0431E-01 -2.4281E-01 3.2189E-01 S4 -6.5798E-03 2.4702E-04 1.2131E-01 -4.7194E-01 1.0416E+00 -1.4923E+00 1.4580E+00 S5 -3.8992E-02 2.7794E-02 -1.0740E-01 2.2179E-01 -3.2309E-01 3.6934E-01 -3.7819E-01 S6 -6.3354E-02 1.0770E-01 -2.4721E-01 3.6083E-01 -3.7017E-01 2.9292E-01 -2.0762E-01 S7 -6.7092E-02 1.7573E-01 -5.6543E-01 1.5107E+00 -3.1953E+00 5.0741E+00 -5.9389E+00 S8 -5.2182E-02 3.8727E-02 -8.2064E-04 -2.0622E-01 6.7151E-01 -1.2451E+00 1.5427E+00 S9 -6.1593E-02 5.0907E-02 -1.1076E-01 2.0548E-01 -2.7428E-01 2.5951E-01 -1.7682E-01 S10 -5.8969E-02 2.2901E-02 -2.5541E-02 2.8929E-02 -2.4453E-02 1.4576E-02 -6.2188E-03 S11 -1.3771E-02 -8.8785E-03 6.6777E-03 -5.5870E-03 3.7830E-03 -1.6818E-03 4.8375E-04 S12 2.1731E-02 -2.0823E-02 1.8309E-02 -1.5428E-02 9.0389E-03 -3.4164E-03 8.5951E-04 S13 -2.8744E-02 8.9343E-03 -5.5146E-03 2.6792E-03 -6.2014E-04 7.0210E-05 -2.0491E-06 S14 -3.6665E-02 4.8320E-03 7.1245E-04 -7.0782E-04 2.4069E-04 -5.1166E-05 7.3998E-06 Face number A18 A20 A22 A24 A26 A28 A30 S1 8.6743E-02 -2.8647E-02 4.8919E-03 1.2308E-04 -2.4195E-04 4.5455E-05 -2.9661E-06 S2 -2.1593E-01 5.5979E-02 -1.5144E-03 -4.1578E-03 1.4121E-03 -2.0669E-04 1.1961E-05 S3 -4.3219E-01 4.3454E-01 -2.9334E-01 1.2893E-01 -3.5470E-02 5.5553E-03 -3.7851E-04 S4 -1.0092E+00 5.2602E-01 -2.2699E-01 8.5456E-02 -2.5404E-02 4.8045E-03 -4.0722E-04 S5 3.7800E-01 -3.4265E-01 2.4629E-01 -1.2703E-01 4.3291E-02 -8.6606E-03 7.6700E-04 S6 1.5328E-01 -1.0630E-01 5.6950E-02 -2.1291E-02 5.2455E-03 -7.7602E-04 5.2781E-05 S7 5.1023E+00 -3.1996E+00 1.4449E+00 -4.5718E-01 9.6162E-02 -1.2077E-02 6.8517E-04 S8 -1.3404E+00 8.2996E-01 -3.6508E-01 1.1157E-01 -2.2533E-02 2.7046E-03 -1.4608E-04 S9 8.7562E-02 -3.1502E-02 8.1389E-03 -1.4697E-03 1.7591E-04 -1.2525E-05 4.0116E-07 S10 1.9188E-03 -4.2615E-04 6.7101E-05 -7.2868E-06 5.1863E-07 -2.1792E-08 4.1050E-10 S11 -9.3022E-05 1.2320E-05 -1.1402E-06 7.3290E-08 -3.1519E-09 8.2277E-11 -9.9144E-13 S12 -1.4868E-04 1.7987E-05 -1.5223E-06 8.8444E-08 -3.3652E-09 7.5592E-11 -7.6076E-13 S13 -4.9846E-07 7.9158E-08 -5.9266E-09 2.6752E-10 -7.4352E-12 1.1787E-13 -8.1950E-16 S14 -7.4981E-07 5.3862E-08 -2.7343E-09 9.6038E-11 -2.2222E-12 3.0488E-14 -1.8795E-16

[0177] Table 21

[0178] Fig.14a The axial chromatic aberration curve of the optical imaging lens of Example 7 is shown, which indicates the deviation of light of different wavelengths from the focal point behind the lens. Fig.14b The astigmatism curve of the optical imaging lens of Example 7 is shown, which represents the meridional image curvature and the sagittal image curvature. Fig.14c The distortion curve of the optical imaging lens of Example 7 is shown, which represents the distortion magnitude values ​​corresponding to different image heights. Fig.14d The magnification chromatic aberration curve of the optical imaging lens of Example 7 is shown, which represents the deviation of different image heights on the imaging surface after the light passes through the lens. Figures 14a to 14d It can be seen from the figure that the optical imaging lens provided in Example 7 can achieve good imaging quality. Specific embodiment 8

[0180] Fig.15 2 is a schematic diagram of the lens group structure of an optical imaging lens embodiment 8 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.

[0181] 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 concave, and its image side surface S6 is concave. The fourth lens E4 has positive focal power, and its object side surface S7 is concave, 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 convex. 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.

[0182] As shown in Table 22, it is a basic parameter table of the optical imaging lens of Example 8, wherein the units of the radius of curvature, thickness, and focal length are all millimeters (mm).

[0183] Face number Surface type Radius of curvature Thickness / distance focal length Refractive Index Dispersion coefficient Cone coefficient OBJ Spherical endless endless STO Spherical endless -0.7280 S1 Aspheric 2.2373 1.0109 5.15 1.54, 56.1 -0.0682 S2 Aspheric 9.2397 0.0340 3.5465 S3 Aspheric 7.8313 0.2785 -16.73 1.67 19.2 0.3449 S4 Aspheric 4.5651 0.4880 3.0987 S5 Aspheric -174.9439 0.2375 -55.65 1.67 19.2 90.0000 S6 Aspheric 48.0896 0.0707 0.0000 S7 Aspheric -125.0000 0.4113 28.99 1.54 56.1 0.0000 S8 Aspheric -14.0558 0.4931 0.0000 S9 Aspheric 4.7140 0.4108 128.61 1.57 37.3 -6.1419 S10 Aspheric 4.8783 0.4621 -5.4430 S11 Aspheric 7.3087 0.7940 6.02 1.54 55.7 -6.6978 S12 Aspheric -5.5667 0.5804 -0.2177 S13 Aspheric -3.1828 0.5737 -3.38 1.54 55.7 -1.1407 S14 Aspheric 4.4823 0.2525 -0.0623 S15 Spherical endless 0.2100 1.52 64.2 S16 Spherical endless 0.2725 S17 Spherical endless

[0184] Table 22

[0185] As shown in Table 23, in Example 8, the total effective focal length of the optical imaging lens is f=5.43 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 6.58 mm, and half of the diagonal length of the effective pixel area on the imaging surface S17 is ImgH=5.20 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.

[0186]

[0187] Table 23

[0188] In Example 8, 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 24 shows the high-order coefficients A of the aspherical mirror surfaces S1 to S14 that can be used in Example 8. 4 , A 6 , A 8 , A 10 , A 12 , A 14 , A 16 , A 18 , A 20 , A 22 , A 24 , A 26 , A 28 and A 30 .

[0189]

[0190]

[0191] Table 24

[0192] Fig.16a The axial chromatic aberration curve of the optical imaging lens of Example 8 is shown, which indicates the deviation of light of different wavelengths from the focal point behind the lens. Fig.16b The astigmatism curve of the optical imaging lens of Example 8 is shown, which represents the meridional image curvature and the sagittal image curvature. Fig.16c The distortion curve of the optical imaging lens of Example 8 is shown, which represents the distortion magnitude values ​​corresponding to different image heights. Fig.16dThe magnification chromatic aberration curve of the optical imaging lens of Example 8 is shown, which represents the deviation of different image heights on the imaging surface after the light passes through the lens. Figures 16a to 16d It can be seen from the figure that the optical imaging lens provided in Example 8 can achieve good imaging quality.

[0193] 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, It is characterized in that The optical imaging lens has seven lenses with optical power, and the optical imaging lens includes, 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; The second lens has a negative optical power, and its object side surface is convex and its image side surface is concave; a third lens having optical power; a fourth lens having positive refractive power; 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 convex; The seventh lens element has a negative optical power, and its object side surface is concave and its image side surface is concave; Wherein, half of the diagonal length of the effective pixel area on the imaging plane ImgH and the axial distance TTL from the object side of the first lens to the imaging plane satisfy: 4.09mm≤ImgH×ImgH / TTL≤4.12mm; the effective focal length f of the optical imaging lens and the maximum field of view FOV of the optical imaging lens satisfy: 4.97mm≤f×tan(1 / 2FOV)≤5.01mm; The combined focal length f12 of the first and second lenses, the combined focal length f67 of the sixth and seventh lenses, and the combined focal length f34 of the third and fourth lenses satisfy: -0.65≤(f12-f67) / f34≤0.

49.

2. The optical imaging lens according to claim 1, Features: The axial distance TTL from the object side of the first lens to the imaging plane and half the diagonal length of the effective pixel area on the imaging plane ImgH satisfy the following: 1.26≤TTL / ImgH<1.

3.

3. The optical imaging lens according to claim 1, Features: The effective focal length f of the optical imaging lens and the entrance pupil diameter EPD of the optical imaging lens satisfy: 1.65≤f / EPD<1.

7.

4. The optical imaging lens according to claim 1, Features: A curvature radius R11 of the object side surface of the sixth lens, a curvature radius R12 of the image side surface of the sixth lens, and an effective focal length f6 of the sixth lens satisfy: 2.1≤(R11-R12) / f6≤2.

32.

5. The optical imaging lens according to claim 1, Features: The effective focal length f1 of the first lens, the effective focal length f7 of the seventh lens, and the effective focal length f of the optical imaging lens satisfy: 1.52≤(f1-f7) / f≤1.

61.

6. The optical imaging lens according to claim 1, Features: The effective focal length f2 of the second lens, the curvature radius R4 of the image side surface of the second lens, and the curvature radius R3 of the object side surface of the second lens satisfy: 1.9 <f2 / (R4-R3)≤6.98。 7. The optical imaging lens according to claim 1, Features: A center thickness CT1 of the first lens on the optical axis, a center thickness CT2 of the second lens on the optical axis, a center thickness CT3 of the third lens on the optical axis, and a center thickness CT4 of the fourth lens on the optical axis satisfy: 1.58≤(CT1+CT2) / (CT3+CT4)≤2.

07.

8. The optical imaging lens according to claim 1, Features: The on-axis distance SAG62 between the intersection of the image side surface of the sixth lens and the optical axis to the effective radius vertex of the image side surface of the sixth lens and the on-axis distance SAG52 between the intersection of the image side surface of the fifth lens and the optical axis to the effective radius vertex of the image side surface of the fifth lens satisfy: 1.8≤SAG62 / SAG52≤2.

26.

9. The optical imaging lens according to claim 1, Features: The axial 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 edge thickness ET7 of the seventh lens meet the following conditions: -3.6 <SAG71 / ET7≤-1.38。 10. The optical imaging lens according to claim 1, Features: The edge thickness ET4 of the fourth lens, the edge thickness ET5 of the fifth lens, and the edge thickness ET6 of the sixth lens satisfy the conditional formula: 0.82≤(ET4+ET5) / ET6≤1.19.

Images