Optical imaging lens

Abstract

The present invention provides an optical imaging lens. The optical imaging lens sequentially includes, from the object side to the image side along the optical axis of the optical imaging lens: 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; a sixth lens with positive optical power; a seventh lens with optical power; The effective focal length f of the optical imaging lens and the maximum semi-field angle Semi-FOV of the optical imaging lens satisfy: f * tan(Semi-FOV) ≥ 5.0 mm; 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 f of the optical imaging lens satisfy: 5.0 < f / R11 + f / R12 < 7.0; The radius of curvature R13 of the object side surface of the seventh lens, the radius of curvature R14 of the image side surface of the seventh lens, and the effective focal length f7 of the seventh lens satisfy: f7 / (R13 - R14) ≤ -2.0. The present invention solves the problem of unstable imaging quality existing in the optical imaging lens in the prior art.

Description

Technical Field

[0001] The present invention relates to the technical field of optical imaging devices, and more particularly, to an optical imaging lens. Background Art

[0002] With the popularization of electronic products such as mobile phones and tablet computers, people's demands for electronic products are getting higher and higher, such as portability and thinness. At the same time, with the improvement of the performance and the reduction of the size of charge-coupled device (CCD) and complementary metal-oxide semiconductor (CMOS) image sensors, the corresponding imaging lenses also need to meet the requirements of high imaging quality. Moreover, the requirements for imaging quality not only need to meet the designed object distance, but also the requirements for macro photography are getting higher and higher.

[0003] That is to say, the optical imaging lenses in the prior art have the problem of unstable imaging quality. Summary of the Invention

[0004] The main object of the present invention is to provide an optical imaging lens to solve the problem of unstable imaging quality of the optical imaging lenses in the prior art.

[0005] To achieve the above object, according to one aspect of the present invention, there is provided an optical imaging lens, which sequentially includes, from the object side to the image side along the optical axis of the optical imaging lens: 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; a sixth lens with positive optical power; a seventh lens with optical power; the effective focal length f of the optical imaging lens and the maximum semi-field angle Semi-FOV of the optical imaging lens satisfy: f * tan(Semi-FOV) ≥ 5.0 mm; 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 f of the optical imaging lens satisfy: 5.0 < f / R11 + f / R12 < 7.0; the radius of curvature R13 of the object side surface of the seventh lens, the radius of curvature R14 of the image side surface of the seventh lens and the effective focal length f7 of the seventh lens satisfy: f7 / (R13 - R14) ≤ -2.0.

[0006] Further, the effective focal length f of the optical imaging lens, the radius of curvature R1 of the object side surface of the first lens and the radius of curvature R8 of the image side surface of the fourth lens satisfy: 1.0 < f / R1 + f / R8 < 2.0.

[0007] Further, the effective focal length f of the optical imaging lens and the radius of curvature R10 of the image side surface of the fifth lens satisfy: 0 < f / R10 < 1.5.

[0008] Furthermore, the effective focal length f of the optical imaging lens, the curvature radius R3 of the object side surface of the second lens, and the curvature radius R4 of the image side surface of the second lens satisfy: 1.4≤f / (R3-R4)<3.5.

[0009] Further, 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 a center thickness CT6 of the sixth lens satisfy: 2<(R12-R11) / CT6<4.5.

[0010] Further, a center thickness CT6 of the sixth lens and a center thickness CT7 of the seventh lens satisfy: 1≤CT7 / CT6≤2.1.

[0011] Furthermore, the effective focal length f of the optical imaging lens and the effective focal length f7 of the seventh lens satisfy: -1.0 <f / f7<-0.5。

[0012] Furthermore, the effective focal length f1 of the first lens and the combined focal length f12 of the first lens and the second lens satisfy: 0.9≤f12 / f1≤1.5.

[0013] Furthermore, the effective focal length f of the optical imaging lens and the combined focal length f567 of the fifth lens to the seventh lens satisfy: -0.5 <f / f567<0。

[0014] Furthermore, the effective focal length f of the optical imaging lens and the effective focal length f4 of the fourth lens satisfy: <f / f4<0.5。

[0015] Furthermore, the effective focal length f6 of the sixth lens and the effective focal length f7 of the seventh lens satisfy: -1.5 <f6 / f7<-0.5。

[0016] Furthermore, the critical point height Yc61 of the object side surface of the sixth lens closest to the optical axis and the critical point height Yc62 of the image side surface of the sixth lens closest to the optical axis satisfy: 1 <Yc62 / Yc61<1.3。

[0017] Furthermore, a critical point sag YT61 at which the object side surface of the sixth lens is closest to the optical axis and a critical point sag YT62 at which the image side surface of the sixth lens is closest to the optical axis satisfy the following relationship: 1≤YT62 / YT61<1.2.

[0018] Furthermore, the maximum edge thickness ET5max between the optical axis and the inflection point on the object side of the fifth lens that is farthest from the optical axis and the minimum edge thickness ET5min between the optical axis and the inflection point on the object side of the fifth lens that is farthest from the optical axis satisfy: (ET5max - ET5min) / ET5min ≤ 0.25.

[0019] Furthermore, the Abbe number V4 of the fourth lens, the Abbe number V5 of the fifth lens, the Abbe number V6 of the sixth lens, and the Abbe number V7 of the seventh lens satisfy: 0 < (V4 + V6 + V7) / 3 - V5 < 20.

[0020] Furthermore, when the object distance ranges from infinity to 8 cm, the focusing movement distance △T of the optical imaging lens on the optical axis satisfies: |△T| ≤ 0.5 mm.

[0021] According to another aspect of the present invention, there is provided an optical imaging lens, which sequentially includes, from the object side to the image side along the optical axis of the optical imaging lens: 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; a sixth lens with positive optical power; a seventh lens with optical power; the effective focal length f of the optical imaging lens and the maximum half field of view Semi - FOV of the optical imaging lens satisfy: f * tan(Semi - FOV) ≥ 5.0 mm; 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 f of the optical imaging lens satisfy: 5.0 < f / R11 + f / R12 < 7.0; the air gap T23 between the second lens and the third lens on the optical axis, the air gap T45 between the fourth lens and the fifth lens on the optical axis, and the air gap T67 between the sixth lens and the seventh lens on the optical axis satisfy: 0 < (T67 - T23) / (T67 - T45) ≤ 1.3.

[0022] Furthermore, the curvature radius R13 of the object side of the seventh lens, the curvature radius R14 of the image side of the seventh lens, and the effective focal length f7 of the seventh lens satisfy: f7 / (R13 - R14) ≤ - 2.0.

[0023] Furthermore, the effective focal length f of the optical imaging lens, the curvature radius R1 of the object side of the first lens, and the curvature radius R8 of the image side of the fourth lens satisfy: 1.0 < f / R1 + f / R8 < 2.0.

[0024] Furthermore, the effective focal length f of the optical imaging lens and the curvature radius R10 of the image side of the fifth lens satisfy: 0 < f / R10 < 1.5.

[0025] Furthermore, the effective focal length f of the optical imaging lens, the curvature radius R3 of the object side surface of the second lens, and the curvature radius R4 of the image side surface of the second lens satisfy: 1.4≤f / (R3-R4)<3.5.

[0026] Further, 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 a center thickness CT6 of the sixth lens satisfy: 2<(R12-R11) / CT6<4.5.

[0027] Further, a center thickness CT6 of the sixth lens and a center thickness CT7 of the seventh lens satisfy: 1≤CT7 / CT6≤2.1.

[0028] Furthermore, the effective focal length f of the optical imaging lens and the effective focal length f7 of the seventh lens satisfy: -1.0 <f / f7<-0.5。

[0029] Furthermore, the effective focal length f1 of the first lens and the combined focal length f12 of the first lens and the second lens satisfy: 0.9≤f12 / f1≤1.5.

[0030] Furthermore, the effective focal length f of the optical imaging lens and the combined focal length f567 of the fifth lens to the seventh lens satisfy: -0.5 <f / f567<0。

[0031] Furthermore, the effective focal length f of the optical imaging lens and the effective focal length f4 of the fourth lens satisfy: <f / f4<0.5。

[0032] Furthermore, the effective focal length f6 of the sixth lens and the effective focal length f7 of the seventh lens satisfy: -1.5 <f6 / f7<-0.5。

[0033] Furthermore, the critical point height Yc61 of the object side surface of the sixth lens closest to the optical axis and the critical point height Yc62 of the image side surface of the sixth lens closest to the optical axis satisfy: 1 <Yc62 / Yc61<1.3。

[0034] Furthermore, a critical point sag YT61 at which the object side surface of the sixth lens is closest to the optical axis and a critical point sag YT62 at which the image side surface of the sixth lens is closest to the optical axis satisfy the following relationship: 1≤YT62 / YT61<1.2.

[0035] Furthermore, a maximum edge thickness ET5max of the fifth lens from the optical axis to an inflection point of the object side surface of the fifth lens farthest from the optical axis and a minimum edge thickness ET5min of the fifth lens from the optical axis to an inflection point of the object side surface of the fifth lens farthest from the optical axis satisfy: (ET5max-ET5min) / ET5min≤0.25.

[0036] Furthermore, the Abbe numbers V4 of the fourth lens, V5 of the fifth lens, V6 of the sixth lens, and V7 of the seventh lens satisfy: 0 < (V4 + V6 + V7) / 3 - V5 < 20.

[0037] Furthermore, when the object distance ranges from infinity to 8 cm, the focusing movement distance △T of the optical imaging lens on the optical axis satisfies: |△T| ≤ 0.5 mm.

[0038] Applying the technical solution of the present invention, the optical imaging lens sequentially includes, from the object side to the image side along the optical axis of the optical imaging lens: 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; a sixth lens with positive optical power; a seventh lens with optical power; between the effective focal length f of the optical imaging lens and the maximum semi-field angle Semi-FOV of the optical imaging lens, it satisfies: f * tan(Semi-FOV) ≥ 5.0 mm; between the curvature radius R11 of the object side surface of the sixth lens, the curvature radius R12 of the image side surface of the sixth lens, and the effective focal length f of the optical imaging lens, it satisfies: 5.0 < f / R11 + f / R12 < 7.0; between the curvature radius R13 of the object side surface of the seventh lens, the curvature radius R14 of the image side surface of the seventh lens, and the effective focal length f7 of the seventh lens, it satisfies: f7 / (R13 - R14) ≤ -2.0.

[0039] Through the reasonable arrangement of the optical power, astigmatism and distortion can be effectively reduced, and the imaging quality of the optical imaging lens can be greatly improved. By reasonably allocating the effective focal length f of the optical imaging lens and the maximum semi-field angle Semi-FOV of the optical imaging lens, the size of the system can be effectively compressed, the light deflection angle can be made smaller, a large image plane can be realized, and the processing difficulty can be reduced. By controlling the curvature radius R11 of the object side surface of the sixth lens, the shape of the sixth lens E6 can be effectively controlled, so that the optical imaging lens has high imaging quality under macro conditions. At the same time, through the constraint on the seventh lens E7, the remaining spherical aberration of the seventh lens E7 after balancing can balance the spherical aberration generated by the first six lenses, thereby finely adjusting and controlling the spherical aberration of the optical imaging lens, and strengthening the precise control of the aberration of the axial field of view. Such a setting is beneficial for the optical imaging lens to have good imaging quality under continuous object distances. BRIEF DESCRIPTION OF THE DRAWINGS

[0040] The accompanying drawings forming a part of this application are used to provide a further understanding of the present invention. The schematic embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation to the present invention. In the drawings:

[0041] Figure 1A schematic structural diagram of an optical imaging lens according to Example 1 of the present invention is shown;

[0042] Figures 2 to 5 They are shown respectively Figure 1 The axial chromatic aberration curve, astigmatism curve, distortion curve and magnification chromatic aberration curve of the optical imaging lens;

[0043] Figure 6 A schematic structural diagram of an optical imaging lens according to Example 2 of the present invention is shown;

[0044] Figures 7 to 10 They are shown respectively Figure 6 The axial chromatic aberration curve, astigmatism curve, distortion curve and magnification chromatic aberration curve of the optical imaging lens;

[0045] Fig.11 A schematic structural diagram of an optical imaging lens according to Example 3 of the present invention is shown;

[0046] Figures 12 to 15 They are shown respectively Fig.11 The axial chromatic aberration curve, astigmatism curve, distortion curve and magnification chromatic aberration curve of the optical imaging lens;

[0047] Fig.16 A schematic structural diagram of an optical imaging lens according to Example 4 of the present invention is shown;

[0048] Figures 17 to 20 They are shown respectively Fig.16 The axial chromatic aberration curve, astigmatism curve, distortion curve and magnification chromatic aberration curve of the optical imaging lens;

[0049] Fig.21 A schematic structural diagram of an optical imaging lens according to Example 5 of the present invention is shown;

[0050] Figure 22 to Figure 25 They are shown respectively Fig.21 The axial chromatic aberration curve, astigmatism curve, distortion curve and magnification chromatic aberration curve of the optical imaging lens;

[0051] Fig.26 A schematic diagram showing the structure of an optical imaging lens according to Example 6 of the present invention is shown;

[0052] Figures 27 to 30 They are shown respectively Fig.26 The axial chromatic aberration curve, astigmatism curve, distortion curve and magnification chromatic aberration curve of the optical imaging lens;

[0053] Fig.31 A schematic diagram showing the structure of an optical imaging lens according to Example 7 of the present invention is shown;

[0054] Figure 32 to Figure 35 They are shown respectively Fig.31 The axial chromatic aberration curve, astigmatism curve, distortion curve and magnification chromatic aberration curve of the optical imaging lens.

[0055] The above drawings include the following reference numerals:

[0056] 10. Optical axis; STO, aperture; E1, first lens; S1, object-side surface of the first lens; S2, image-side surface of the first lens; E2, second lens; S3, object-side surface of the second lens; S4, image-side surface of the second lens; E3, third lens; S5, object-side surface of the third lens; S6, image-side surface of the third lens; E4, fourth lens; S7, object-side surface of the fourth lens; S8, image-side surface of the fourth lens; E5, fifth lens; S9, object-side surface of the fifth lens; S10, image-side surface of the fifth lens; E6, sixth lens; S11, object-side surface of the sixth lens; S12, image-side surface of the sixth lens; E7, seventh lens; S13, object-side surface of the seventh lens; S14, image-side surface of the seventh lens; E8, filter; S15, object-side surface of the filter; S16, image-side surface of the filter; S17, imaging surface. DETAILED DESCRIPTION

[0057] It should be noted that, in the absence of conflict, the embodiments and features in the embodiments of the present application can be combined with each other. The present invention will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0058] It should be noted that, unless otherwise specified, all technical and scientific terms used in this application have the same meanings as commonly understood by ordinary technicians in the technical field to which this application belongs.

[0059] In the present invention, unless otherwise specified, the directional words used, such as "up, down, top, bottom", usually refer to the directions shown in the drawings, or to the components themselves in the vertical, perpendicular or gravity directions; similarly, for ease of understanding and description, "inside and outside" refer to the inside and outside relative to the outline of each component itself, but the above-mentioned directional words are not used to limit the present invention.

[0060] 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 application, the first lens discussed below may also be referred to as the second lens or the third lens.

[0061] In the drawings, the thickness, size and shape of the lenses have been slightly exaggerated for ease of illustration. Specifically, the shapes of the spherical or aspherical surfaces shown in the drawings are 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 for illustration only and are not drawn strictly to scale.

[0062] In this text, the paraxial region refers to the region near the optical axis 10. 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 closer to the object side is the object side surface of the lens, and the surface of each lens closer to the image side is called the image side surface of the lens. The judgment of the surface shape in the paraxial region can be based on the judgment method of those with ordinary knowledge in this field, and the concavity and convexity are judged by the positive and negative of the R value (R refers to the radius of curvature in the paraxial region, usually the R value on the lens database (lens data) in optical software). For the object side surface, when the R value is positive, it is judged as convex, and when the R value is negative, it is judged as concave; for the image side surface, when the R value is positive, it is judged as concave, and when the R value is negative, it is judged as convex.

[0063] To solve the problem of unstable imaging quality existing in the optical imaging lens in the prior art, the present invention provides an optical imaging lens.

[0064] Embodiment 1

[0065] As Figures 1 to 35 shown, the optical imaging lens sequentially includes a first lens E1 with positive optical power, a second lens E2 with optical power, a third lens E3 with optical power, a fourth lens E4 with optical power, a fifth lens E5 with optical power, a sixth lens E6 with positive optical power, and a seventh lens E7 with optical power along the optical axis 10 of the optical imaging lens from the object side to the image side. The effective focal length f of the optical imaging lens and the maximum semi-field angle Semi-FOV of the optical imaging lens satisfy: f * tan(Semi-FOV) ≥ 5.0 mm; 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 f of the optical imaging lens satisfy: 5.0 < f / R11 + f / R12 < 7.0; the radius of curvature R13 of the object side surface of the seventh lens, the radius of curvature R14 of the image side surface of the seventh lens, and the effective focal length f7 of the seventh lens satisfy: f7 / (R13 - R14) ≤ -2.0.

[0066] Preferably, the effective focal length f of the optical imaging lens and the maximum semi-field angle Semi-FOV of the optical imaging lens can satisfy: 5.1 ≤ f * tan(Semi-FOV) ≤ 5.3 mm.

[0067] Preferably, 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 f of the optical imaging lens can satisfy: 5.3 ≤ f / R11 + f / R12 ≤ 6.2.

[0068] Preferably, the curvature radius R13 of the object side surface of the seventh lens, the curvature radius R14 of the image side surface of the seventh lens, and the effective focal length f7 of the seventh lens satisfy: -7.4 ≤ f7 / (R13 - R14) ≤ -2.0.

[0069] Through the reasonable arrangement of the optical power, the astigmatism and distortion can be effectively reduced, and the imaging quality of the optical imaging lens can be greatly improved. By reasonably distributing the effective focal length f of the optical imaging lens and the maximum semi-field angle Semi-FOV of the optical imaging lens, the size of the system can be effectively compressed, the light deflection angle can be made smaller, a large image surface can be realized, and the processing difficulty can be reduced. By controlling the curvature radius R11 of the object side surface of the sixth lens, the shape of the sixth lens E6 can be effectively controlled, so that the optical imaging lens has a high imaging quality under macro conditions. At the same time, through the constraint on the seventh lens E7, the remaining spherical aberration after the seventh lens E7 is balanced can balance the spherical aberration generated by the first six lenses, and then the spherical aberration of the optical imaging lens can be finely adjusted and controlled, and the precise control of the aberration of the on-axis field of view is strengthened. Such a setting is beneficial to the optical imaging lens having a good imaging quality at a continuous object distance.

[0070] In this embodiment, the effective focal length f of the optical imaging lens, the curvature radius R1 of the object side surface of the first lens, and the curvature radius R8 of the image side surface of the fourth lens satisfy: 1.0 < f / R1 + f / R8 < 2.0. Preferably, the effective focal length f of the optical imaging lens, the curvature radius R1 of the object side surface of the first lens, and the curvature radius R8 of the image side surface of the fourth lens satisfy: 1.3 ≤ f / R1 + f / R8 ≤ 1.8. Such a setting balances the spherical aberration generated by the first lens E1 and the fourth lens E4, and ensures a good imaging quality for the on-axis field of view.

[0071] In this embodiment, the effective focal length f of the optical imaging lens and the curvature radius R10 of the image side surface of the fifth lens satisfy: 0 < f / R10 < 1.5. Preferably, the effective focal length f of the optical imaging lens and the curvature radius R10 of the image side surface of the fifth lens satisfy: 0.3 ≤ f / R10 < 1.5. By controlling the curvature radius R10 of the image side surface of the fifth lens, the contribution amount of its fifth-order spherical aberration can be well controlled, and then the third-order spherical aberration generated by the previous lenses can be compensated and balanced, ensuring a good imaging quality for the on-axis field of view.

[0072] In this embodiment, the effective focal length f of the optical imaging lens, the radius of curvature R3 of the object side surface of the second lens, and the radius of curvature R4 of the image side surface of the second lens satisfy: 1.4≤f / (R3-R4)<3.5. Preferably, the effective focal length f of the optical imaging lens, the radius of curvature R3 of the object side surface of the second lens, and the radius of curvature R4 of the image side surface of the second lens satisfy: 1.4≤f / (R3-R4)≤3.4. By reasonably controlling the ratio of the effective focal length f of the optical imaging lens to the difference between the radius of curvature R3 of the object side surface of the second lens and the radius of curvature R4 of the image side surface of the second lens, the astigmatism contribution of the image side surface of the optical imaging lens is within a reasonable range, so as to balance the accumulated astigmatism of the system, so that the optical imaging lens has relatively good imaging quality in both the meridian plane and the sagittal plane.

[0073] In this embodiment, the radius of curvature R11 of the object side surface of the sixth lens, the radius of curvature R12 of the image side surface of the sixth lens, and the center thickness CT6 of the sixth lens satisfy: 2<(R12-R11) / CT6<4.5. Preferably, 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 center thickness CT6 of the sixth lens satisfy: 2.1≤(R12-R11) / CT6≤4.2. This arrangement effectively controls the shape of the sixth lens E6, making the sixth lens E6 more uniform and making use of the processing and molding of the optical imaging lens. At the same time, the shape of the sixth lens E6 has a great contribution to the macro enhancement of the entire system.

[0074] In this embodiment, the center thickness CT6 of the sixth lens and the center thickness CT7 of the seventh lens satisfy: 1≤CT7 / CT6≤2.1. By controlling the ratio of the center thickness CT6 of the sixth lens and the center thickness CT7 of the seventh lens, the distortion contribution of the sixth lens E6 and the seventh lens E7 is controlled within a reasonable range, so that the distortion amount of each field of view is finally controlled below 2%, reducing the difficulty of later design.

[0075] In this embodiment, the air gaps T23 between the second lens and the third lens on the optical axis 10, the air gaps T45 between the fourth lens and the fifth lens on the optical axis 10, and the air gaps T67 between the sixth lens and the seventh lens on the optical axis 10 satisfy: 0 < (T67 - T23) / (T67 - T45) ≤ 1.3. Preferably, the air gaps T23 between the second lens and the third lens on the optical axis 10, the air gaps T45 between the fourth lens and the fifth lens on the optical axis 10, and the air gaps T67 between the sixth lens and the seventh lens on the optical axis 10 satisfy: 0.2 ≤ (T67 - T23) / (T67 - T45) ≤ 1.3. Such a setting can effectively balance the field curvature of the optical imaging lens, make the optical imaging lens have a reasonable field curvature, and at the same time reduce the air gaps between the lenses, which is beneficial to the processing and assembly of the lenses and improves the system yield.

[0076] In this embodiment, the effective focal length f1 of the first lens and the combined focal length f12 of the first lens and the second lens satisfy: 0.9 ≤ f12 / f1 ≤ 1.5. By reasonably restricting the ratio of the effective focal length f1 of the first lens to the combined focal length f12 of the first lens and the second lens, the first lens E1 and the second lens E2 have reasonable optical powers, and the contribution of the aberrations generated by the first lens E1 and the second lens E2 can be reasonably controlled, ensuring a reasonable contribution of aberrations and effectively reducing the sensitivity of the first lens E1 and the second lens E2.

[0077] In this embodiment, the effective focal length f of the optical imaging lens and the combined focal length f567 of the fifth lens to the seventh lens satisfy: -0.5 < f / f567 < 0. Preferably, the effective focal length f of the optical imaging lens and the combined focal length f567 of the fifth lens to the seventh lens satisfy: -0.4 ≤ f / f567 < 0. By restricting the ratio range of the effective focal length f of the optical imaging lens to the combined focal length f567 of the fifth lens to the seventh lens, the fifth lens E5, the sixth lens E6, and the seventh lens E7 can be combined to form an optical lens group with a reasonable negative optical power to balance the aberrations generated by the optical lens group with a positive optical power in the front, ensuring the imaging quality of the optical imaging lens.

[0078] It should be noted that in this application, the front refers to the direction of the optical imaging lens close to the object side, and the rear refers to the direction of the optical imaging lens close to the image side.

[0079] In this embodiment, the effective focal length f of the optical imaging lens and the effective focal length f4 of the fourth lens satisfy: 0 < f / f4 < 0.5. By restricting the ratio of the effective focal length f of the optical imaging lens to the effective focal length f4 of the fourth lens within a reasonable range, the spherical aberration generated by the front and rear lenses can be balanced, and then the spherical aberration of the system can be finely adjusted and controlled, strengthening the precise control of the axial field aberration.

[0080] In this embodiment, the effective focal length f of the optical imaging lens and the effective focal length f7 of the seventh lens satisfy: -1.0 < f / f7 < -0.5. Preferably, the effective focal length f of the optical imaging lens and the effective focal length f7 of the seventh lens satisfy: -0.9 ≤ f / f7 ≤ -0.6. By constraining the ratio of the effective focal length f of the optical imaging lens to the effective focal length f7 of the seventh lens within a reasonable range, the remaining spherical aberration of the seventh lens E7 after balancing can balance the spherical aberration generated by the first six lenses, thereby finely adjusting and controlling the spherical aberration of the optical imaging lens, and at the same time strengthening the precise control of the axial field aberration.

[0081] In this embodiment, the effective focal length f6 of the sixth lens and the effective focal length f7 of the seventh lens satisfy: -1.5 < f6 / f7 < -0.5. Preferably, the effective focal length f6 of the sixth lens and the effective focal length f7 of the seventh lens satisfy: -1.4 ≤ f6 / f7 ≤ -0.6. Such a setting can control the spherical aberration generated by the sixth lens E6 and the seventh lens E7 within a small range, ensuring that the optical imaging lens can clearly image on the axial field.

[0082] In this embodiment, the critical point height Yc61 closest to the optical axis 10 on the object side of the sixth lens and the critical point height Yc62 closest to the optical axis 10 on the image side of the sixth lens satisfy: 1 < Yc62 / Yc61 < 1.3. Preferably, the critical point height Yc61 closest to the optical axis 10 on the object side of the sixth lens and the critical point height Yc62 closest to the optical axis 10 on the image side of the sixth lens satisfy: 1.1 ≤ Yc62 / Yc61 < 1.3. By reasonably controlling the ratio of the critical point height Yc61 closest to the optical axis 10 on the object side of the sixth lens to the critical point height Yc62 closest to the optical axis 10 on the image side of the sixth lens, it effectively ensures that the sixth lens E6 has a large sagittal height in the middle aperture band and prevents the opening angle of the sixth lens E6 from being too large. Such a setting can ensure that the lens is easy to process while effectively improving the macro performance of the optical imaging lens.

[0083] In this embodiment, the critical point sagittal height YT61 closest to the optical axis 10 on the object side of the sixth lens and the critical point sagittal height YT62 closest to the optical axis 10 on the image side of the sixth lens satisfy: 1 ≤ YT62 / YT61 < 1.2. By reasonably controlling the ratio of the critical point sagittal height YT61 closest to the optical axis 10 on the object side of the sixth lens to the critical point sagittal height YT62 closest to the optical axis 10 on the image side of the sixth lens, the shape of the sixth lens E6 is similar to the shape of W, which is beneficial to improving the macro performance, enabling the optical imaging lens to have good peak field curvature at infinity and also having good imaging quality under macro conditions.

[0084] It should be noted that the above-mentioned macro refers to a range where the object distance is less than 8 cm.

[0085] In this embodiment, the maximum edge thickness ET5max of the fifth lens from the optical axis 10 to the inflection point farthest from the optical axis 10 of the object side of the fifth lens and the minimum edge thickness ET5min of the fifth lens from the optical axis 10 to the inflection point farthest from the optical axis 10 of the object side of the fifth lens and the optical axis 10 satisfies: (ET5max-ET5min) / ET5min≤0.25. Preferably, the maximum edge thickness ET5max of the fifth lens from the optical axis 10 to the inflection point farthest from the optical axis 10 of the object side of the fifth lens and the minimum edge thickness ET5min of the fifth lens from the optical axis 10 to the inflection point farthest from the optical axis 10 of the object side of the fifth lens and the optical axis 10 satisfies: 0≤(ET5max-ET5min) / ET5min≤0.25. This arrangement ensures that the fifth lens E5 has an inflection point and that the fifth lens E5 has good uniformity, is easy to process and mold, and avoids the risk of welding marks of the fifth lens E5.

[0086] In this embodiment, the Abbe number V4 of the fourth lens, the Abbe number V5 of the fifth lens, the Abbe number V6 of the sixth lens and the Abbe number V7 of the seventh lens satisfy: 0<(V4+V6+V7) / 3-V5<20. Preferably, the Abbe number V4 of the fourth lens, the Abbe number V5 of the fifth lens, the Abbe number V6 of the sixth lens and the Abbe number V7 of the seventh lens satisfy: 18.3≤(V4+V6+V7) / 3-V5≤18.6. This arrangement can reasonably allocate the optical power of the fourth lens E4, the fifth lens E5, the sixth lens E6 and the seventh lens E7, so that the optical imaging lens has a strong ability to correct chromatic aberration and ensure the imaging quality.

[0087] In this embodiment, when the object distance is from infinity to 8 cm, the focus moving distance △T of the optical imaging lens on the optical axis 10 satisfies: |△T|≤0.5mm. In this way, when the object distance changes, the motor can be used to drive the optical imaging lens to move on the optical axis 10, and then adjust the focal plane position to achieve focus. This effectively reduces the requirements for the motor stroke, ensures a fast focus response, and improves the user experience.

[0088] Embodiment 2

[0089] The present invention provides an optical imaging lens, which sequentially includes 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, a sixth lens with positive optical power, and a seventh lens with optical power from the object side to the image side along the optical axis of the optical imaging lens; the following relationships are satisfied between the effective focal length f of the optical imaging lens and the maximum semi-field angle Semi-FOV of the optical imaging lens: f * tan(Semi-FOV) ≥ 5.0 mm; the following relationship is satisfied between the curvature radius R11 of the object side surface of the sixth lens, the curvature radius R12 of the image side surface of the sixth lens, and the effective focal length f of the optical imaging lens: 5.0 < f / R11 + f / R12 < 7.0; the following relationship is satisfied between the effective focal length f of the optical imaging lens and the effective focal length f7 of the seventh lens: -1.0 < f / f7 < -0.5.

[0090] Preferably, the following relationship may be satisfied between the effective focal length f of the optical imaging lens and the maximum semi-field angle Semi-FOV of the optical imaging lens: 5.1 ≤ f * tan(Semi-FOV) ≤ 5.3 mm.

[0091] Preferably, the following relationship may be satisfied between the curvature radius R11 of the object side surface of the sixth lens, the curvature radius R12 of the image side surface of the sixth lens, and the effective focal length f of the optical imaging lens: 5.3 ≤ f / R11 + f / R12 ≤ 6.2.

[0092] Preferably, the following relationship is satisfied between the effective focal length f of the optical imaging lens and the effective focal length f7 of the seventh lens: -0.9 ≤ f / f7 ≤ -0.6.

[0093] By reasonably arranging the optical powers, astigmatism and distortion can be effectively reduced, and the imaging quality of the optical imaging lens can be greatly improved. By reasonably allocating the effective focal length f of the optical imaging lens and the maximum semi-field angle Semi-FOV of the optical imaging lens, the size of the system can be effectively compressed, the light deflection angle can be made smaller, a large image plane can be realized, and the processing difficulty can be reduced. By controlling the curvature radius R11 of the object side surface of the sixth lens, the shape of the sixth lens E6 can be effectively controlled, so that the optical imaging lens has a high imaging quality under macro conditions. At the same time, by constraining the ratio of the effective focal length f of the optical imaging lens and the effective focal length f7 of the seventh lens within a reasonable range, the remaining spherical aberration after balancing of the seventh lens E7 can be used to balance the spherical aberration generated by the first six lenses, thereby finely adjusting and controlling the spherical aberration of the optical imaging lens, and at the same time strengthening the precise control of the axial field aberration.

[0094] In this embodiment, the curvature radius R13 of the object side surface of the seventh lens, the curvature radius R14 of the image side surface of the seventh lens, and the effective focal length f7 of the seventh lens satisfy: f7 / (R13 - R14) ≤ -2.0. Preferably, the curvature radius R13 of the object side surface of the seventh lens, the curvature radius R14 of the image side surface of the seventh lens, and the effective focal length f7 of the seventh lens satisfy: -7.4 ≤ f7 / (R13 - R14) ≤ -2.0. By constraining the seventh lens E7, the residual spherical aberration after balancing the seventh lens E7 can balance the spherical aberration generated by the first six lenses, thereby finely adjusting and controlling the spherical aberration of the optical imaging lens, and strengthening the precise control of the aberration of the on-axis field of view. Such a setting is beneficial for the optical imaging lens to have good imaging quality at continuous object distances.

[0095] In this embodiment, the effective focal length f of the optical imaging lens, the curvature radius R1 of the object side surface of the first lens, and the curvature radius R8 of the image side surface of the fourth lens satisfy: 1.0 < f / R1 + f / R8 < 2.0. Preferably, the effective focal length f of the optical imaging lens, the curvature radius R1 of the object side surface of the first lens, and the curvature radius R8 of the image side surface of the fourth lens satisfy: 1.3 ≤ f / R1 + f / R8 ≤ 1.8. Such a setting balances the spherical aberration generated by the first lens E1 and the fourth lens E4, ensuring good imaging quality of the on-axis field of view.

[0096] In this embodiment, the effective focal length f of the optical imaging lens and the curvature radius R10 of the image side surface of the fifth lens satisfy: 0 < f / R10 < 1.5. Preferably, the effective focal length f of the optical imaging lens and the curvature radius R10 of the image side surface of the fifth lens satisfy: 0.3 ≤ f / R10 < 1.5. By controlling the curvature radius R10 of the image side surface of the fifth lens, the contribution of its fifth-order spherical aberration can be well controlled, thereby compensating and balancing the third-order spherical aberration generated by the previous lenses, ensuring good imaging quality of the on-axis field of view.

[0097] In this embodiment, the effective focal length f of the optical imaging lens, the curvature radius R3 of the object side surface of the second lens, and the curvature radius R4 of the image side surface of the second lens satisfy: 1.4 ≤ f / (R3 - R4) < 3.5. Preferably, the effective focal length f of the optical imaging lens, the curvature radius R3 of the object side surface of the second lens, and the curvature radius R4 of the image side surface of the second lens satisfy: 1.4 ≤ f / (R3 - R4) ≤ 3.4. By reasonably controlling the ratio of the effective focal length f of the optical imaging lens to the difference between the curvature radius R3 of the object side surface of the second lens and the curvature radius R4 of the image side surface of the second lens, the contribution of astigmatism of the image side surface of the optical imaging lens is within a reasonable range to balance the accumulated astigmatism of the system, so that the optical imaging lens has relatively good imaging quality in both the meridional plane and the sagittal plane.

[0098] In this embodiment, the radius of curvature R11 of the object side surface of the sixth lens, the radius of curvature R12 of the image side surface of the sixth lens, and the center thickness CT6 of the sixth lens satisfy: 2<(R12-R11) / CT6<4.5. Preferably, 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 center thickness CT6 of the sixth lens satisfy: 2.1≤(R12-R11) / CT6≤4.2. This arrangement effectively controls the shape of the sixth lens E6, making the sixth lens E6 more uniform and making use of the processing and molding of the optical imaging lens. At the same time, the shape of the sixth lens E6 has a great contribution to the macro enhancement of the entire system.

[0099] In this embodiment, the center thickness CT6 of the sixth lens and the center thickness CT7 of the seventh lens satisfy: 1≤CT7 / CT6≤2.1. By controlling the ratio of the center thickness CT6 of the sixth lens and the center thickness CT7 of the seventh lens, the distortion contribution of the sixth lens E6 and the seventh lens E7 is controlled within a reasonable range, so that the distortion amount of each field of view is finally controlled below 2%, reducing the difficulty of later design.

[0100] In this embodiment, the air interval T23 between the second lens and the third lens on the optical axis, the air interval T45 between the fourth lens and the fifth lens on the optical axis, and the air interval T67 between the sixth lens and the seventh lens on the optical axis satisfy: 0<(T67-T23) / (T67-T45)≤1.3. Preferably, the air interval T23 between the second lens and the third lens on the optical axis 10, the air interval T45 between the fourth lens and the fifth lens on the optical axis 10, and the air interval T67 between the sixth lens and the seventh lens on the optical axis 10 satisfy: 0.2≤(T67-T23) / (T67-T45)≤1.3. Such a setting can effectively balance the field curvature of the optical imaging lens, so that the optical imaging lens has a reasonable field curvature, and at the same time reduce the air interval between the lenses, which is beneficial to the processing and assembly of the lenses and improves the system yield.

[0101] In this embodiment, the effective focal length f1 of the first lens and the combined focal length f12 of the first lens and the second lens satisfy: 0.9≤f12 / f1≤1.5. By reasonably constraining the ratio of the effective focal length f1 of the first lens to the combined focal length f12 of the first lens and the second lens, the first lens E1 and the second lens E2 have reasonable optical powers, and the contribution of the aberrations generated by the first lens E1 and the second lens E2 can be reasonably controlled to ensure the reasonable contribution of the aberrations, while effectively reducing the sensitivity of the first lens E1 and the second lens E2.

[0102] In this embodiment, the effective focal length f of the optical imaging lens and the combined focal length f567 of the fifth to seventh lenses satisfy: -0.5 < f / f567 < 0. Preferably, the effective focal length f of the optical imaging lens and the combined focal length f567 of the fifth to seventh lenses satisfy: -0.4 ≤ f / f567 < 0. By constraining the ratio range of the effective focal length f of the optical imaging lens and the combined focal length f567 of the fifth to seventh lenses, it is possible to make the combination of the fifth lens E5, the sixth lens E6, and the seventh lens E7 act as an optical lens group with a reasonable negative optical power to balance the aberration generated by the optical lens group with a positive optical power in the front, ensuring the imaging quality of the optical imaging lens.

[0103] It should be noted that in this application, the front refers to the direction of the optical imaging lens close to the object side, and the rear refers to the direction of the optical imaging lens close to the image side.

[0104] In this embodiment, the effective focal length f of the optical imaging lens and the effective focal length f4 of the fourth lens satisfy: 0 < f / f4 < 0.5. Constraining the ratio of the effective focal length f of the optical imaging lens and the effective focal length f4 of the fourth lens within a reasonable range can balance the spherical aberration generated by the front and rear lenses, thereby finely adjusting and controlling the spherical aberration of the system and strengthening the precise control of the axial field aberration.

[0105] In this embodiment, the effective focal length f6 of the sixth lens and the effective focal length f7 of the seventh lens satisfy: -1.5 < f6 / f7 < -0.5. Preferably, the effective focal length f6 of the sixth lens and the effective focal length f7 of the seventh lens satisfy: -1.4 ≤ f6 / f7 ≤ -0.6. Such a setting can control the spherical aberration generated by the sixth lens E6 and the seventh lens E7 within a small range, ensuring that the optical imaging lens can clearly image on the axial field.

[0106] In this embodiment, the height Yc61 of the critical point on the object side of the sixth lens closest to the optical axis and the height Yc62 of the critical point on the image side of the sixth lens closest to the optical axis satisfy: 1 < Yc62 / Yc61 < 1.3. Preferably, the height Yc61 of the critical point on the object side of the sixth lens closest to the optical axis and the height Yc62 of the critical point on the image side of the sixth lens closest to the optical axis satisfy: 1.1 ≤ Yc62 / Yc61 < 1.3. By reasonably controlling the ratio of the height Yc61 of the critical point on the object side of the sixth lens closest to the optical axis and the height Yc62 of the critical point on the image side of the sixth lens closest to the optical axis, it effectively ensures that the sixth lens E6 has a large sagittal height in the middle aperture band and prevents the opening angle of the sixth lens E6 from being too large. Such a setting can ensure that the lens is easy to process while effectively improving the macro performance of the optical imaging lens.

[0107] In this embodiment, the critical point sag YT61 of the object side surface of the sixth lens closest to the optical axis and the critical point sag YT62 of the image side surface of the sixth lens closest to the optical axis satisfy: 1≤YT62 / YT61<1.2. By reasonably controlling the ratio of the critical point sag YT61 of the object side surface of the sixth lens closest to the optical axis 10 and the critical point sag YT62 of the image side surface of the sixth lens closest to the optical axis 10, the shape of the sixth lens E6 is similar to the shape of W, which is conducive to improving the macro performance, so that the optical imaging lens has a good peak field curvature at infinity, and also has good imaging quality at macro.

[0108] It should be noted that the above-mentioned macro refers to a range where the object distance is less than 8 cm.

[0109] In this embodiment, the maximum edge thickness ET5max of the fifth lens from the optical axis to the inflection point farthest from the optical axis on the object side of the fifth lens and the minimum edge thickness ET5min of the fifth lens from the optical axis to the inflection point farthest from the optical axis on the object side of the fifth lens satisfy the following conditions: (ET5max-ET5min) / ET5min≤0.25. Preferably, the maximum edge thickness ET5max of the fifth lens from the optical axis 10 to the inflection point farthest from the optical axis 10 on the object side of the fifth lens and the minimum edge thickness ET5min of the fifth lens from the optical axis 10 to the inflection point farthest from the optical axis 10 on the object side of the fifth lens satisfy the following conditions: 0≤(ET5max-ET5min) / ET5min≤0.25. This arrangement ensures that the fifth lens E5 has an inflection point and that the fifth lens E5 has good uniformity, is easy to process and mold, and avoids the risk of welding marks on the fifth lens E5.

[0110] In this embodiment, the Abbe number V4 of the fourth lens, the Abbe number V5 of the fifth lens, the Abbe number V6 of the sixth lens and the Abbe number V7 of the seventh lens satisfy: 0<(V4+V6+V7) / 3-V5<20. Preferably, the Abbe number V4 of the fourth lens, the Abbe number V5 of the fifth lens, the Abbe number V6 of the sixth lens and the Abbe number V7 of the seventh lens satisfy: 18.3≤(V4+V6+V7) / 3-V5≤18.6. This arrangement can reasonably allocate the optical power of the fourth lens E4, the fifth lens E5, the sixth lens E6 and the seventh lens E7, so that the optical imaging lens has a strong ability to correct chromatic aberration and ensure the imaging quality.

[0111] In this embodiment, when the object distance is from infinity to 8 cm, the focus moving distance △T of the optical imaging lens on the optical axis satisfies: |△T|≤0.5mm. In this way, when the object distance changes, the motor can be used to drive the optical imaging lens to move on the optical axis 10, and then adjust the focal plane position to achieve focus. This effectively reduces the requirements for the motor stroke, ensures a fast focus response, and improves the user experience.

[0112] The optical imaging lens may further include at least one aperture STO to improve the imaging quality of the lens. Optionally, the aperture STO may be arranged before the first lens E1. Optionally, the optical imaging lens may further include a filter E8 for correcting color deviation and / or a protective glass for protecting the photosensitive element located on the imaging surface.

[0113] The optical imaging lens in the present application may use multiple lenses, such as the seven lenses mentioned above. By reasonably allocating the focal length, surface shape, center thickness of each lens, and axial distance between lenses, etc., the aperture of the optical imaging lens can be effectively increased, the sensitivity of the lens can be reduced, and the processability of the lens can be improved, making the optical imaging lens more conducive to production and processing and applicable to portable electronic devices such as smartphones. The above-mentioned optical imaging lens also has the advantages of large aperture, ultra-thinness, and good imaging quality, which can meet the needs of miniaturization of smart electronic products.

[0114] In the present application, at least one of the mirror surfaces of each lens is an aspherical mirror surface. The characteristic of an aspherical lens is that the curvature changes continuously from the center of the lens to the periphery of the lens. Unlike a spherical lens having a constant curvature from the center of the lens to the periphery of the lens, an aspherical lens has a better curvature radius characteristic, and has the advantages of improving distortion aberration and improving astigmatism aberration. After using an aspherical lens, the aberration occurring during imaging can be eliminated as much as possible, thereby improving the imaging quality.

[0115] 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. If necessary, the optical imaging lens may also include other numbers of lenses.

[0116] The following further describes examples of specific surface shapes and parameters of the optical imaging lens applicable to the above-mentioned embodiments with reference to the accompanying drawings.

[0117] It should be noted that any one of the following examples 1 to 7 is applicable to all embodiments of the present application.

[0118] Example 1

[0119] like Figures 1 to 5 As shown, the optical imaging lens of Example 1 of the present application is described. Figure 1 A schematic structural diagram of an optical imaging lens of Example 1 is shown.

[0120] like Figure 1 As shown, the optical imaging lens includes, from the object side to the image side, 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.

[0121] The first lens E1 has positive focal power, the object side surface S1 of the first lens is convex, and the image side surface S2 of the first lens is concave. The second lens E2 has negative focal power, the object side surface S3 of the second lens is convex, and the image side surface S4 of the second lens is concave. The third lens E3 has positive focal power, the object side surface S5 of the third lens is concave, and the image side surface S6 of the third lens is convex. The fourth lens E4 has positive focal power, the object side surface S7 of the fourth lens is concave, and the image side surface S8 of the fourth lens is convex. The fifth lens E5 has negative focal power, the object side surface S9 of the fifth lens is concave, and the image side surface S10 of the fifth lens is concave. The sixth lens E6 has positive focal power, the object side surface S11 of the sixth lens is convex, and the image side surface S12 of the sixth lens is concave. The seventh lens E7 has negative focal power, the object side surface S13 of the seventh lens is convex, and the image side surface S14 of the seventh lens is concave. Light from an object passes through the surfaces S1 to S16 in sequence and is finally imaged on the imaging surface S17 .

[0122] In this example, the total effective focal length f of the optical imaging lens is 5.71 mm, and the maximum field of view FOV of the optical imaging lens is 84.1°.

[0123] Table 1 shows a basic structural parameter table of the optical imaging lens of Example 1, wherein the units of the radius of curvature, thickness / distance and focal length are all millimeters (mm).

[0124]

[0125]

[0126] Table 1

[0127] In Example 1, the object side surface and the image side surface of any lens from the first lens E1 to the seventh lens E7 are both aspherical surfaces, and the surface shape of each aspherical lens can be defined by but not limited to the following aspherical surface formula:

[0128]

[0129] 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 10; 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 above); k is the cone coefficient; Ai is the correction coefficient of the i-th order of the aspheric surface. Table 2 below gives the high-order coefficients A4, A6, A8, A10, A12, A14, A16, A18, A20, A22, A24, A26, A28 and A30 that can be used for each aspheric mirror surface S1-S14 in Example 1.

[0130]

[0131]

[0132] Table 2

[0133] Figure 2 The axial chromatic aberration curve of the optical imaging lens of Example 1 is shown, which indicates the deviation of the focal point of light of different wavelengths after passing through the optical imaging lens. Figure 3 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 4 The distortion curve of the optical imaging lens of Example 1 is shown, which represents the distortion magnitude values ​​corresponding to different field angles. Figure 5 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 optical imaging lens.

[0134] according to Figures 2 to 5 It can be seen that the optical imaging lens provided in Example 1 can achieve good imaging quality.

[0135] Example 2

[0136] like Figures 6 to 10 As shown, the optical imaging lens of Example 2 of the present application is described. In this example and the following examples, for the sake of brevity, some descriptions similar to Example 1 will be omitted. Figure 6 A schematic structural diagram of the optical imaging lens of Example 2 is shown.

[0137] like Figure 6 As shown, the optical imaging lens includes, from the object side to the image side, 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.

[0138] The first lens E1 has positive focal power, the object side surface S1 of the first lens is convex, and the image side surface S2 of the first lens is concave. The second lens E2 has negative focal power, the object side surface S3 of the second lens is convex, and the image side surface S4 of the second lens is concave. The third lens E3 has negative focal power, the object side surface S5 of the third lens is convex, and the image side surface S6 of the third lens is concave. The fourth lens E4 has positive focal power, the object side surface S7 of the fourth lens is convex, and the image side surface S8 of the fourth lens is convex. The fifth lens E5 has negative focal power, the object side surface S9 of the fifth lens is convex, and the image side surface S10 of the fifth lens is concave. The sixth lens E6 has positive focal power, the object side surface S11 of the sixth lens is convex, and the image side surface S12 of the sixth lens is concave. The seventh lens E7 has negative focal power, the object side surface S13 of the seventh lens is convex, and the image side surface S14 of the seventh lens is concave. Light from an object passes through the surfaces S1 to S16 in sequence and is finally imaged on the imaging surface S17 .

[0139] In this example, the total effective focal length f of the optical imaging lens is 5.52 mm, and the maximum field of view FOV of the optical imaging lens is 86.8°.

[0140] Table 3 shows a basic structural parameter table of the optical imaging lens of Example 2, wherein the units of the radius of curvature, thickness / distance and focal length are all millimeters (mm).

[0141]

[0142] Table 3

[0143] Table 4 shows the high-order coefficients of each aspherical mirror surface that can be used in Example 2, wherein each aspherical surface shape can be defined by formula (1) given in Example 1 above.

[0144]

[0145]

[0146] Table 4

[0147] Figure 7 The axial chromatic aberration curve of the optical imaging lens of Example 1 is shown, which indicates the deviation of the focal point of light of different wavelengths after passing through the optical imaging lens. Figure 8 The astigmatism curve of the optical imaging lens of Example 1 is shown, which represents the meridional image curvature and the sagittal image curvature. Fig. 9 The distortion curve of the optical imaging lens of Example 1 is shown, which represents the distortion magnitude values ​​corresponding to different field angles. Fig.10 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 optical imaging lens.

[0148] according to Figures 7 to 10 It can be seen that the optical imaging lens provided in Example 2 can achieve good imaging quality.

[0149] Example 3

[0150] like Figures 11 to 15 As shown, the optical imaging lens of Example 3 of the present application is described. In this example and the following examples, for the sake of brevity, some descriptions similar to Example 1 will be omitted. Fig.11 A schematic structural diagram of the optical imaging lens of Example 3 is shown.

[0151] like Fig.11 As shown, the optical imaging lens includes, from the object side to the image side, 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.

[0152] The first lens E1 has positive focal power, the object side surface S1 of the first lens is convex, and the image side surface S2 of the first lens is concave. The second lens E2 has positive focal power, the object side surface S3 of the second lens is convex, and the image side surface S4 of the second lens is concave. The third lens E3 has negative focal power, the object side surface S5 of the third lens is concave, and the image side surface S6 of the third lens is concave. The fourth lens E4 has positive focal power, the object side surface S7 of the fourth lens is convex, and the image side surface S8 of the fourth lens is convex. The fifth lens E5 has negative focal power, the object side surface S9 of the fifth lens is concave, and the image side surface S10 of the fifth lens is concave. The sixth lens E6 has positive focal power, the object side surface S11 of the sixth lens is convex, and the image side surface S12 of the sixth lens is concave. The seventh lens E7 has negative focal power, the object side surface S13 of the seventh lens is convex, and the image side surface S14 of the seventh lens is concave. Light from an object passes through the surfaces S1 to S16 in sequence and is finally imaged on the imaging surface S17 .

[0153] In this example, the total effective focal length f of the optical imaging lens is 5.64 mm, and the maximum field of view FOV of the optical imaging lens is 85.3°.

[0154] Table 5 shows a basic structural parameter table of the optical imaging lens of Example 3, wherein the units of the radius of curvature, thickness / distance and focal length are all millimeters (mm).

[0155]

[0156] Table 5

[0157] Table 6 shows the high-order coefficients that can be used for each aspherical mirror surface in Example 3, where each aspherical surface type can be defined by formula (1) given in Example 1 above.

[0158]

[0159]

[0160] Table 6

[0161] Fig.12 The axial chromatic aberration curve of the optical imaging lens of Example 3 is shown, which indicates the deviation of the focal point of light of different wavelengths after passing through the optical imaging lens. Fig.13 The astigmatism curve of the optical imaging lens of Example 3 is shown, which represents the meridional image curvature and the sagittal image curvature. Fig.14 The distortion curve of the optical imaging lens of Example 3 is shown, which represents the distortion magnitude values ​​corresponding to different field angles. Fig.15 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 optical imaging lens.

[0162] according to Figures 12 to 15 It can be seen that the optical imaging lens provided in Example 3 can achieve good imaging quality.

[0163] Example 4

[0164] like Figures 16 to 20 As shown, the optical imaging lens of Example 4 of the present application is described. In this example and the following examples, for the sake of brevity, some descriptions similar to Example 1 will be omitted. Fig.16 A schematic structural diagram of the optical imaging lens of Example 4 is shown.

[0165] like Fig.16 As shown, the optical imaging lens includes, from the object side to the image side, 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.

[0166] The first lens E1 has positive focal power, the object side surface S1 of the first lens is convex, and the image side surface S2 of the first lens is concave. The second lens E2 has positive focal power, the object side surface S3 of the second lens is convex, and the image side surface S4 of the second lens is concave. The third lens E3 has positive focal power, the object side surface S5 of the third lens is concave, and the image side surface S6 of the third lens is convex. The fourth lens E4 has positive focal power, the object side surface S7 of the fourth lens is concave, and the image side surface S8 of the fourth lens is convex. The fifth lens E5 has negative focal power, the object side surface S9 of the fifth lens is convex, and the image side surface S10 of the fifth lens is concave. The sixth lens E6 has positive focal power, the object side surface S11 of the sixth lens is convex, and the image side surface S12 of the sixth lens is concave. The seventh lens E7 has negative focal power, the object side surface S13 of the seventh lens is convex, and the image side surface S14 of the seventh lens is concave. Light from an object passes through the surfaces S1 to S16 in sequence and is finally imaged on the imaging surface S17 .

[0167] In this example, the total effective focal length f of the optical imaging lens is 5.65 mm, and the maximum field of view FOV of the optical imaging lens is 85.3°.

[0168] Table 7 shows a basic structural parameter table of the optical imaging lens of Example 4, wherein the units of the radius of curvature, thickness / distance and focal length are all millimeters (mm).

[0169]

[0170] Table 7

[0171] Table 8 shows the high-order coefficients that can be used for each aspheric mirror surface in Example 4, where each aspheric surface shape can be defined by formula (1) given in the above Example 1.

[0172]

[0173]

[0174] Table 8

[0175] Fig.17 The axial chromatic aberration curve of the optical imaging lens of Example 4 is shown, which indicates the deviation of the focal point of light of different wavelengths after passing through the optical imaging lens. Fig.18 The astigmatism curve of the optical imaging lens of Example 4 is shown, which represents the meridional image curvature and the sagittal image curvature. Fig.19 The distortion curve of the optical imaging lens of Example 4 is shown, which represents the distortion magnitude values ​​corresponding to different field angles. Fig. 20 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 optical imaging lens.

[0176] according to Figures 17 to 20 It can be seen that the optical imaging lens provided in Example 4 can achieve good imaging quality.

[0177] Example 5

[0178] like Figure 21 to Figure 25 As shown, the optical imaging lens of Example 5 of the present application is described. In this example and the following examples, for the sake of brevity, some descriptions similar to Example 1 will be omitted. Fig.21 A schematic structural diagram of the optical imaging lens of Example 5 is shown.

[0179] like Fig.21 As shown, the optical imaging lens includes, from the object side to the image side, 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.

[0180] The first lens E1 has positive focal power, the object side surface S1 of the first lens is convex, and the image side surface S2 of the first lens is concave. The second lens E2 has negative focal power, the object side surface S3 of the second lens is convex, and the image side surface S4 of the second lens is concave. The third lens E3 has negative focal power, the object side surface S5 of the third lens is concave, and the image side surface S6 of the third lens is convex. The fourth lens E4 has positive focal power, the object side surface S7 of the fourth lens is concave, and the image side surface S8 of the fourth lens is convex. The fifth lens E5 has positive focal power, the object side surface S9 of the fifth lens is convex, and the image side surface S10 of the fifth lens is concave. The sixth lens E6 has positive focal power, the object side surface S11 of the sixth lens is convex, and the image side surface S12 of the sixth lens is concave. The seventh lens E7 has negative focal power, the object side surface S13 of the seventh lens is convex, and the image side surface S14 of the seventh lens is concave. Light from an object passes through the surfaces S1 to S16 in sequence and is finally imaged on the imaging surface S17 .

[0181] In this example, the total effective focal length f of the optical imaging lens is 5.68 mm, and the maximum field of view FOV of the optical imaging lens is 85.0°.

[0182] Table 9 shows a basic structural parameter table of the optical imaging lens of Example 5, wherein the units of the radius of curvature, thickness / distance and focal length are all millimeters (mm).

[0183]

[0184] Table 9

[0185] Table 10 shows the high-order coefficients that can be used for each aspheric mirror surface in Example 5, where each aspheric surface shape can be defined by formula (1) given in the above Example 1.

[0186]

[0187]

[0188] Table 10

[0189] Fig. 22 The axial chromatic aberration curve of the optical imaging lens of Example 5 is shown, which indicates the deviation of the focal point of light of different wavelengths after passing through the optical imaging lens. Fig.23 An astigmatism curve of the optical imaging lens of Example 5 is shown, which indicates meridional image curvature and sagittal image curvature. Fig.24 The distortion curve of the optical imaging lens of Example 5 is shown, which represents the distortion magnitude values ​​corresponding to different field angles. Fig.25 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 optical imaging lens.

[0190] according to Figure 22 to Figure 25 It can be seen that the optical imaging lens provided in Example 5 can achieve good imaging quality.

[0191] Example 6

[0192] like Figures 26 to 30 As shown, the optical imaging lens of Example 6 of the present application is described. In this example and the following examples, for the sake of brevity, some descriptions similar to Example 1 will be omitted. Fig.26 A schematic structural diagram of the optical imaging lens of Example 6 is shown.

[0193] like Fig.26 As shown, the optical imaging lens includes, from the object side to the image side, 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.

[0194] The first lens E1 has positive focal power, the object side surface S1 of the first lens is convex, and the image side surface S2 of the first lens is concave. The second lens E2 has negative focal power, the object side surface S3 of the second lens is convex, and the image side surface S4 of the second lens is concave. The third lens E3 has negative focal power, the object side surface S5 of the third lens is concave, and the image side surface S6 of the third lens is concave. The fourth lens E4 has positive focal power, the object side surface S7 of the fourth lens is convex, and the image side surface S8 of the fourth lens is convex. The fifth lens E5 has negative focal power, the object side surface S9 of the fifth lens is convex, and the image side surface S10 of the fifth lens is concave. The sixth lens E6 has positive focal power, the object side surface S11 of the sixth lens is convex, and the image side surface S12 of the sixth lens is concave. The seventh lens E7 has negative focal power, the object side surface S13 of the seventh lens is convex, and the image side surface S14 of the seventh lens is concave. Light from an object passes through the surfaces S1 to S16 in sequence and is finally imaged on the imaging surface S17 .

[0195] In this example, the total effective focal length f of the optical imaging lens is 5.52 mm, and the maximum field of view FOV of the optical imaging lens is 86.4°.

[0196] Table 11 shows a basic structural parameter table of the optical imaging lens of Example 6, wherein the units of the radius of curvature, thickness / distance and focal length are all millimeters (mm).

[0197]

[0198] Table 11

[0199] Table 12 shows the high-order coefficients that can be used for each aspheric mirror surface in Example 6, where each aspheric surface shape can be defined by formula (1) given in the above Example 1.

[0200]

[0201]

[0202] Table 12

[0203] Fig. 27 The axial chromatic aberration curve of the optical imaging lens of Example 6 is shown, which indicates the deviation of the focal point of light of different wavelengths after passing through the optical imaging lens. Fig.28 An astigmatism curve of the optical imaging lens of Example 6 is shown, which indicates meridional image curvature and sagittal image curvature. Fig.29 The distortion curve of the optical imaging lens of Example 6 is shown, which represents the distortion magnitude values ​​corresponding to different field angles. Fig.30 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 optical imaging lens.

[0204] according to Figures 27 to 30 It can be seen that the optical imaging lens provided in Example 6 can achieve good imaging quality.

[0205] Example 7

[0206] like Figure 31 to Figure 35 As shown, the optical imaging lens of Example 7 of the present application is described. In this example and the following examples, for the sake of brevity, some descriptions similar to Example 1 will be omitted. Fig.31 A schematic structural diagram of the optical imaging lens of Example 7 is shown.

[0207] like Fig.31 As shown, the optical imaging lens includes, from the object side to the image side, 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.

[0208] The first lens E1 has positive focal power, the object side surface S1 of the first lens is convex, and the image side surface S2 of the first lens is convex. The second lens E2 has negative focal power, the object side surface S3 of the second lens is convex, and the image side surface S4 of the second lens is concave. The third lens E3 has negative focal power, the object side surface S5 of the third lens is convex, and the image side surface S6 of the third lens is concave. The fourth lens E4 has positive focal power, the object side surface S7 of the fourth lens is convex, and the image side surface S8 of the fourth lens is convex. The fifth lens E5 has negative focal power, the object side surface S9 of the fifth lens is concave, and the image side surface S10 of the fifth lens is concave. The sixth lens E6 has positive focal power, the object side surface S11 of the sixth lens is convex, and the image side surface S12 of the sixth lens is concave. The seventh lens E7 has negative focal power, the object side surface S13 of the seventh lens is convex, and the image side surface S14 of the seventh lens is concave. Light from an object passes through the surfaces S1 to S16 in sequence and is finally imaged on the imaging surface S17 .

[0209] In this example, the total effective focal length f of the optical imaging lens is 5.59 mm, and the maximum field of view FOV of the optical imaging lens is 85.7°.

[0210] Table 13 shows a basic structural parameter table of the optical imaging lens of Example 7, wherein the units of the radius of curvature, thickness / distance and focal length are all millimeters (mm).

[0211]

[0212] Table 13

[0213] Table 14 shows the high-order coefficients that can be used for each aspheric mirror surface in Example 7, where each aspheric surface shape can be defined by formula (1) given in the above Example 1.

[0214]

[0215]

[0216] Table 14

[0217] Fig.32 The axial chromatic aberration curve of the optical imaging lens of Example 7 is shown, which indicates the deviation of the focal point of light of different wavelengths after passing through the optical imaging lens. Fig.33 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.34 The distortion curve of the optical imaging lens of Example 7 is shown, which represents the distortion magnitude values ​​corresponding to different field angles. Fig.35 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 optical imaging lens.

[0218] according to Figure 32 to Figure 35 It can be seen that the optical imaging lens given in Example 7 can achieve good imaging quality.

[0219] In summary, Examples 1 to 7 respectively satisfy the relationships shown in Table 15.

[0220] Conditional / Example 1 2 3 4 5 6 7 f*tan(Semi-FOV) 5.15 5.22 5.20 5.20 5.21 5.19 5.19 f7(R13-R14) -3.28 -7.31 -2.76 -2.80 -2.82 -4.24 -2.03 f / R11+f / R12 5.57 5.35 5.43 5.42 6.16 5.40 5.76 f / R1+f / R8 1.34 1.78 1.61 1.64 1.67 1.70 1.50 f / R10 0.46 0.95 0.70 0.71 0.31 1.44 1.27 f / (R3-R4) 1.41 3.32 2.79 2.99 2.51 1.54 1.75 (R12-R11) / CT6 2.92 2.27 3.57 4.17 2.16 3.33 3.32 CT7 / CT6 1.46 1.06 1.52 1.72 2.03 1.16 1.02 (T67-T23) / (T67-T45) 0.76 1.27 0.32 0.28 0.47 0.30 0.83 f12 / f1 1.40 1.39 0.96 0.95 1.32 1.39 1.45 f / f567 -0.35 -0.05 -0.14 -0.10 -0.02 -0.08 -0.19 f / f4 0.25 0.38 0.35 0.05 0.20 0.27 0.41 f / f7 -0.81 -0.64 -0.88 -0.90 -0.88 -0.79 -0.86 f6 / f7 -0.88 -0.68 -0.91 -0.92 -1.38 -0.66 -0.64 Yc62 / Yc61 1.18 1.25 1.21 1.20 1.19 1.21 1.23 YT62 / YT61 1.04 1.15 1.08 1.08 1.08 1.07 1.07 (ETmax-ETmin) / ETmin 0.04 0.08 0.14 0.18 0.23 0.11 0.07 (V4+V6+V7) / 3-V5 18.38 18.60 18.38 18.38 18.38 18.60 18.38

[0221] Table 15

[0222] Table 16 gives the effective focal length f of the optical imaging lenses of Examples 1 to 7, the effective focal length f1 to f7 of each lens, and the maximum field of view FOV.

[0223] Example parameters 1 2 3 4 5 6 7 f1(mm) 5.38 5.67 7.55 7.62 5.54 5.33 5.30 f2(mm) -14.61 -15.82 500.00 500.00 -17.47 -15.10 -13.47 f3(mm) 644.38 -22.02 -20.75 999.99 -28.73 -28.49 -23.55 f4(mm) 22.40 14.66 16.23 108.61 28.89 20.70 13.67 f5(mm) -9.98 -11.58 -14.06 -15.61 500.00 -8.68 -6.79 f6(mm) 6.17 5.86 5.84 5.79 8.95 4.65 4.16 f7(mm) -7.04 -8.65 -6.39 -6.27 -6.47 -7.02 -6.51 f(mm) 5.71 5.52 5.64 5.65 5.68 5.52 5.59 FOV(°) 84.1 86.8 85.3 85.3 85.0 86.4 85.7

[0224] Table 16

[0225] The present application also provides an imaging device, whose electronic photosensitive element can be a photosensitive coupled device (CCD) or a complementary metal oxide semiconductor element (CMOS). The imaging device can be an independent imaging device such as a digital camera, or an imaging module integrated in a mobile electronic device such as a mobile phone. The imaging device is equipped with the optical imaging lens described above.

[0226] Obviously, the above-described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the present invention.

[0227] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present application. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprise" and / or "include" are used in this specification, it indicates the presence of features, steps, operations, devices, components and / or combinations thereof.

[0228] It should be noted that the terms "first", "second", etc. in the specification and claims of the present application and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the numbers used in this way can be interchanged where appropriate, so that the embodiments of the present application described herein can be implemented in an order other than those illustrated or described herein.

[0229] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. An optical imaging lens, characterized in that: The optical axis of the optical imaging lens includes, from the object side to the image side: a first lens having positive optical power; a second lens having optical power; a third lens having optical power; a fourth lens having optical power; a fifth lens having optical power; a sixth lens having positive refractive power; a seventh lens having optical power; The effective focal length f of the optical imaging lens and the maximum half field of view Semi-FOV of the optical imaging lens satisfy the following conditions: 5.22mm≥f*tan(Semi-FOV)≥5.15mm; The curvature radius R11 of the object side surface of the sixth lens, the curvature radius R12 of the image side surface of the sixth lens, and the effective focal length f of the optical imaging lens satisfy the following relationship: 5.35≤f / R11+f / R12≤6.16; The curvature radius R13 of the object side surface of the seventh lens, the curvature radius R14 of the image side surface of the seventh lens and the effective focal length f7 of the seventh lens satisfy: -7.31≤f7 / (R13-R14)≤-2.0; The optical imaging lens is composed of seven lenses from the first lens to the seventh lens; the fourth lens has positive optical power; the seventh lens has negative optical power; the object side surface of the first lens is convex; the object side surface of the second lens is convex, and the image side surface is concave; the image side surface of the fourth lens is convex; the image side surface of the fifth lens is concave; the object side surface of the sixth lens is convex, and the image side surface is concave; the object side surface of the seventh lens is convex, and the image side surface is concave.

2. The optical imaging lens according to claim 1, wherein: The effective focal length f of the optical imaging lens, the curvature radius R1 of the object side surface of the first lens, and the curvature radius R8 of the image side surface of the fourth lens satisfy: 1.34≤f / R1+f / R8≤1.

78.

3. The optical imaging lens according to claim 1, wherein: The effective focal length f of the optical imaging lens and the curvature radius R10 of the image side surface of the fifth lens satisfy the following relationship: 0.31≤f / R10≤1.

44.

4. The optical imaging lens according to claim 1, wherein: The effective focal length f of the optical imaging lens, the curvature radius R3 of the object side surface of the second lens, and the curvature radius R4 of the image side surface of the second lens satisfy: 1.4≤f / (R3-R4)≤3.

32.

5. The optical imaging lens according to claim 1, wherein: 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 a center thickness CT6 of the sixth lens satisfy: 2.16≤(R12-R11) / CT6≤4.

17.

6. The optical imaging lens according to claim 1, wherein: The center thickness CT6 of the sixth lens and the center thickness CT7 of the seventh lens satisfy the following: 1.02≤CT7 / CT6≤2.

03.

7. The optical imaging lens according to claim 1, wherein: The effective focal length f of the optical imaging lens and the combined focal length f567 of the fifth lens to the seventh lens satisfy the following: -0.35≤f / f567≤-0.

02.

8. The optical imaging lens according to claim 1, wherein: The maximum edge thickness ET5max of the fifth lens from the optical axis to the inflection point of the object side surface of the fifth lens farthest from the optical axis and the minimum edge thickness ET5min of the fifth lens from the optical axis to the inflection point of the object side surface of the fifth lens farthest from the optical axis satisfy the following conditions: 0.04≤(ET5max-ET5min) / ET5min≤0.

23.

9. The optical imaging lens according to claim 1, wherein: When the object distance ranges from infinity to 8 cm, the focus movement distance △T of the optical imaging lens on the optical axis satisfies: |△T|≤0.5mm.

10. An optical imaging lens, characterized in that: The optical axis of the optical imaging lens includes, from the object side to the image side: a first lens having positive optical power; a second lens having optical power; a third lens having optical power; a fourth lens having optical power; a fifth lens having optical power; a sixth lens having positive refractive power; a seventh lens having optical power; The effective focal length f of the optical imaging lens and the maximum half field of view Semi-FOV of the optical imaging lens satisfy the following conditions: 5.22mm≥f*tan(Semi-FOV)≥5.15mm; The curvature radius R11 of the object side surface of the sixth lens, the curvature radius R12 of the image side surface of the sixth lens, and the effective focal length f of the optical imaging lens satisfy the following relationship: 5.35≤f / R11+f / R12≤6.16; The air interval T23 between the second lens and the third lens on the optical axis, the air interval T45 between the fourth lens and the fifth lens on the optical axis, and the air interval T67 between the sixth lens and the seventh lens on the optical axis satisfy the following: 0.28≤(T67-T23) / (T67-T45)≤1.27; The optical imaging lens is composed of seven lenses from the first lens to the seventh lens; the fourth lens has positive optical power; the seventh lens has negative optical power; the object side surface of the first lens is convex; the object side surface of the second lens is convex, and the image side surface is concave; the image side surface of the fourth lens is convex; the image side surface of the fifth lens is concave; the object side surface of the sixth lens is convex, and the image side surface is concave; the object side surface of the seventh lens is convex, and the image side surface is concave.

Images