Optical imaging lens

Abstract

The application provides an optical imaging lens. The optical imaging lens comprises, in sequence from an object side of the optical imaging lens to an image side of the optical imaging lens: a first lens, the first lens having negative refractive power, the object side surface of the first lens being a convex surface; a second lens, the second lens having negative refractive power, the object side surface of the second lens being a concave surface; a third lens, the third lens having positive refractive power; a fourth lens, the fourth lens having positive refractive power; a fifth lens, the fifth lens having negative refractive power, the object side surface of the fifth lens being a concave surface; a sixth lens, the sixth lens having positive refractive power; and a seventh lens, the object side surface of the seventh lens being a convex surface, and the image side surface of the seventh lens being a concave surface; wherein the maximum field of view FOV of the optical imaging lens satisfies 125°<FOV<148°. The application solves the problem that the optical imaging lens in the prior art cannot simultaneously achieve large wide angle and high image quality.

Description

Technical Field

[0001] This invention relates to the field of optical imaging equipment technology, and more specifically, to an optical imaging lens. Background Technology

[0002] In recent years, with the rapid development of the internet, imaging in smart devices has played a vital role in daily life and work. Wide-angle optical imaging lenses are now applicable to smart homes, video conferencing, and security monitoring, enhancing the real-time nature of human-computer interaction and providing convenient services for remote work. To achieve wider adoption of optical imaging lenses in smart devices, manufacturers prioritize factors such as temperature stability, field of view, size, and image quality. These are also key challenges for consumer electronics applications. Existing wide-angle optical imaging lenses generally suffer from size and image quality limitations that fail to meet user needs, significantly impacting user satisfaction.

[0003] In other words, existing optical imaging lenses suffer from the problem of not being able to achieve both a wide-angle view and high image quality. Summary of the Invention

[0004] The main objective of this invention is to provide an optical imaging lens to solve the problem that existing optical imaging lenses cannot simultaneously achieve a wide angle and high image quality.

[0005] To achieve the above objectives, according to one aspect of the present invention, an optical imaging lens is provided, comprising, sequentially from the object side to the image side of the optical imaging lens: a first lens having negative optical power and a convex object side; a second lens having negative optical power and a concave object side; a third lens having positive optical power; a fourth lens having positive optical power; a fifth lens having negative optical power and a concave object side; a sixth lens having positive optical power; and a seventh lens having a convex object side and a concave image side; wherein the maximum field of view (FOV) of the optical imaging lens satisfies: 125°. <FOV<148°。

[0006] Furthermore, the effective focal length f1 of the first lens and the effective focal length f2 of the second lens satisfy the following relationship: 0 <f1 / f2<1.5。

[0007] Furthermore, the radius of curvature R1 of the object side of the first lens and the radius of curvature R2 of the image side of the first lens satisfy the following condition: 0.7 < (R1 + R2) / (R1 - R2) < 1.5.

[0008] Furthermore, the radius of curvature R6 of the image side of the third lens, the radius of curvature R5 of the object side of the third lens, and the effective focal length f3 of the third lens satisfy the following condition: 2.5 < (R5 - R6) / f3 < 6.5.

[0009] Furthermore, the radius of curvature R8 of the image side of the fourth lens, the radius of curvature R7 of the object side of the fourth lens, and the effective focal length f4 of the fourth lens satisfy the following condition: 1.8 < (R7 - R8) / f4 < 2.5.

[0010] Furthermore, the effective focal length f5 of the fifth lens, the effective focal length f6 of the sixth lens, and the effective focal length f of the optical imaging lens satisfy the following condition: 0.5 < (f5 + f6) / f < 3.8.

[0011] Furthermore, the axial distance TTL from the object side of the first lens to the imaging plane and the center thickness CT3 of the third lens on the optical axis satisfy: 4.1 <TTL / CT3<5.1。

[0012] Furthermore, the effective half-aperture DT11 of the object-side surface of the first lens and the effective half-aperture DT41 of the object-side surface of the fourth lens satisfy: 5.4 <DT11 / DT41<6.4。

[0013] Furthermore, the effective half-aperture DT72 of the image-side surface of the seventh lens and the effective half-aperture DT42 of the image-side surface of the fourth lens satisfy the following condition: 2.1 <DT72 / DT42<2.8。

[0014] Furthermore, the axial distance SL from the aperture stop to the imaging plane, the center thickness CT4 of the fourth lens on the optical axis, the center thickness CT5 of the fifth lens on the optical axis, the center thickness CT6 of the sixth lens on the optical axis, and the center thickness CT7 of the seventh lens on the optical axis satisfy the following relationship: 1.5 <SL / (CT4+CT5+CT6+CT7)<2.0。

[0015] Furthermore, the combined focal length f23 of the second and third lenses, and the edge thickness ET2 of the second lens and the edge thickness ET3 of the third lens satisfy the following relationship: 1.1 <f23 / (ET2+ET3)<1.8。

[0016] Furthermore, the center thickness CT1 of the first lens on the optical axis and the edge thickness ET1 of the first lens satisfy the following relationship: 1.1 <ET1 / CT1<1.9。

[0017] Furthermore, the edge thicknesses ET5 of the fifth lens, ET6 of the sixth lens, and ET7 of the seventh lens satisfy the following condition: 1.0 < (ET6 + ET7) / ET5 < 2.0.

[0018] According to another aspect of the present invention, an optical imaging lens is provided, which sequentially includes, from the object side to the image side of the optical imaging lens: a first lens having a negative optical power, the object side surface of the first lens being convex; a second lens having a negative optical power, the object side surface of the second lens being concave; a third lens having a positive optical power; a fourth lens having a positive optical power; a fifth lens having a negative optical power, the object side surface of the fifth lens being concave; a sixth lens having a positive optical power; a seventh lens having a convex object side surface and a concave image side surface; wherein, the on-axis distance TTL from the object side surface of the first lens to the imaging surface and the central thickness CT3 of the third lens on the optical axis satisfy: 4.1 < TTL / CT3 < 5.1.

[0019] Further, the maximum field of view FOV of the optical imaging lens satisfies: 125° < FOV < 148°; the effective focal length f1 of the first lens and the effective focal length f2 of the second lens satisfy: 0 < f1 / f2 < 1.5.

[0020] Further, the radius of curvature R1 of the object side surface of the first lens and the radius of curvature R2 of the image side surface of the first lens satisfy: 0.7 < (R1 + R2) / (R! - R2) < 1.5.

[0021] Further, the radius of curvature R6 of the image side surface of the third lens, the radius of curvature R5 of the object side surface of the third lens and the effective focal length f3 of the third lens satisfy: 2.5 < (R5 - R6) / f3 < 6.5.

[0022] Further, the radius of curvature R8 of the image side surface of the fourth lens, the radius of curvature R7 of the object side surface of the fourth lens and the effective focal length f4 of the fourth lens satisfy: 1.8 < (R7 - R8) / f4 < 2.5.

[0023] [[ID=!5]]Further, the effective focal length f5 of the fifth lens, the effective focal length f6 of the sixth lens and the effective focal length f of the optical imaging lens satisfy: 0.5 < (f5 + f6) / f < 3.8.

[0024] Further, the effective semi-aperture DT11 of the object side surface of the first lens and the effective semi-aperture DT41 of the object side surface of the fourth lens satisfy: 5.4 < DT11 / DT41 < 6.4.

[0025] Further, the effective semi-aperture DT72 of the image side surface of the seventh lens and the effective semi-aperture DT42 of the image side surface of the fourth lens satisfy: 2.1 < DT72 / DT42 < 2.8.

[0026] Furthermore, the axial distance SL from the aperture stop to the imaging plane, the center thickness CT4 of the fourth lens on the optical axis, the center thickness CT5 of the fifth lens on the optical axis, the center thickness CT6 of the sixth lens on the optical axis, and the center thickness CT7 of the seventh lens on the optical axis satisfy the following relationship: 1.5 <SL / (CT4+CT5+CT6+CT7)<2.0。

[0027] Furthermore, the combined focal length f23 of the second and third lenses, and the edge thickness ET2 of the second lens and the edge thickness ET3 of the third lens satisfy the following relationship: 1.1 <f23 / (ET2+ET3)<1.8。

[0028] Furthermore, the center thickness CT1 of the first lens on the optical axis and the edge thickness ET1 of the first lens satisfy the following relationship: 1.1 <ET1 / CT1<1.9。

[0029] Furthermore, the edge thicknesses ET5 of the fifth lens, ET6 of the sixth lens, and ET7 of the seventh lens satisfy the following condition: 1.0 < (ET6 + ET7) / ET5 < 2.0.

[0030] Applying the technical solution of this invention, the optical imaging lens sequentially comprises a first lens, a second lens, a third lens, a fourth lens, a fifth lens, a sixth lens, and a seventh lens from the object side to the image side. The first lens has negative optical power, and its object side is convex. The second lens has negative optical power, and its object side is concave. The third lens has positive optical power. The fourth lens has positive optical power. The fifth lens has negative optical power, and its object side is concave. The sixth lens has positive optical power. The seventh lens has a convex object side and a concave image side. The maximum field of view (FOV) of the optical imaging lens satisfies 125°. <FOV<148°。

[0031] By rationally allocating the optical power and surface shape of each lens, various aberrations of the system can be effectively balanced and corrected, significantly reducing astigmatism and distortion, and greatly improving the imaging quality of the optical imaging lens. By limiting the maximum field of view (FOV) of the optical imaging lens to the range of 125° to 148°, the lens can meet the field of view requirements, ensuring a sufficiently large imaging field of view to achieve a wide-angle optical imaging lens. Furthermore, the optical imaging lens of this application features miniaturization, a wide angle, and high image quality, meeting the needs of users and the market for practical applications, and improving user satisfaction. Attached Figure Description

[0032] The accompanying drawings, which form part of this application, are used to provide a further understanding of the invention. The illustrative embodiments of the invention and their descriptions are used to explain the invention and do not constitute an undue limitation of the invention. In the drawings:

[0033] Figure 1 A schematic diagram of the structure of an optical imaging lens of Example 1 of the present invention is shown;

[0034] Figures 2 to 5 They are shown respectively Figure 1 The on-axis chromatic aberration curve, astigmatism curve, distortion curve, and magnification chromatic aberration curve of the optical imaging lens in the image;

[0035] Figure 6 A schematic diagram of the structure of the optical imaging lens of Example 2 of the present invention is shown;

[0036] Figures 7 to 10 They are shown respectively Figure 6 The on-axis chromatic aberration curve, astigmatism curve, distortion curve, and magnification chromatic aberration curve of the optical imaging lens in the image;

[0037] Figure 11 A schematic diagram of the structure of the optical imaging lens of Example 3 of the present invention is shown;

[0038] Figures 12 to 15 They are shown respectively Figure 11 The on-axis chromatic aberration curve, astigmatism curve, distortion curve, and magnification chromatic aberration curve of the optical imaging lens in the image;

[0039] Figure 16 A schematic diagram of the structure of the optical imaging lens of Example 4 of the present invention is shown;

[0040] Figures 17 to 20 They are shown respectively Figure 16 The on-axis chromatic aberration curve, astigmatism curve, distortion curve, and magnification chromatic aberration curve of the optical imaging lens in the image;

[0041] Figure 21 A schematic diagram of the structure of the optical imaging lens of Example 5 of the present invention is shown;

[0042] Figures 22 to 25 They are shown respectively Figure 21 The on-axis chromatic aberration curve, astigmatism curve, distortion curve, and magnification chromatic aberration curve of the optical imaging lens in the image;

[0043] Figure 26 A schematic diagram of the structure of the optical imaging lens of Example Six of the present invention is shown;

[0044] Figures 27 to 30 They are shown respectively Figure 26 The on-axis chromatic aberration curve, astigmatism curve, distortion curve, and magnification chromatic aberration curve of the optical imaging lens in the image;

[0045] Figure 31 A schematic diagram of the structure of the optical imaging lens of Example Seven of the present invention is shown;

[0046] Figures 32 to 35 They are shown respectively Figure 31 The on-axis chromatic aberration curve, astigmatism curve, distortion curve, and magnification chromatic aberration curve of the optical imaging lens.

[0047] The above figures include the following reference numerals:

[0048] STO, Aperture Stop; E1, First Lens; S1, Object-side Face of First Lens; S2, Image-side Face of First Lens; E2, Second Lens; S3, Object-side Face of Second Lens; S4, Image-side Face of Second Lens; E3, Third Lens; S5, Object-side Face of Third Lens; S6, Image-side Face of Third Lens; E4, Fourth Lens; S7, Object-side Face of Fourth Lens; S8, Image-side Face of Fourth Lens; E5, Fifth Lens; S9, Object-side Face of Fifth Lens; S10, Image-side Face of Fifth Lens; E6, Sixth Lens; S11, Object-side Face of Sixth Lens; S12, Image-side Face of Sixth Lens; E7, Seventh Lens; S13, Object-side Face of Seventh Lens; S14, Image-side Face of Seventh Lens; E8, Filter; S15, Object-side Face of Filter; S16, Image-side Face of Filter; S17, Imaging Plane. Detailed Implementation

[0049] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other. The present invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0050] It should be noted that, unless otherwise specified, all technical and scientific terms used in this application have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains.

[0051] In this invention, unless otherwise stated, directional terms such as "upper," "lower," "top," and "bottom" are generally used in relation to the direction shown in the accompanying drawings, or in relation to the vertical, perpendicular, or gravitational direction of the component itself; similarly, for ease of understanding and description, "inner" and "outer" refer to the inner and outer contours of each component itself, but the above directional terms are not intended to limit this invention.

[0052] It should be noted that in this specification, the terms "first," "second," "third," etc., are used only to distinguish one feature from another and do not imply any limitation on the features. Therefore, without departing from the teachings of this application, the first lens discussed below may also be referred to as the second lens or the third lens.

[0053] In the accompanying 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 illustrated by way of example. That is, the shapes of the spherical or aspherical surfaces are not limited to those shown in the drawings. The drawings are for illustrative purposes only and are not drawn strictly to scale.

[0054] In this paper, the paraxial region refers to the region near the optical axis. If the lens surface is convex and the location of the convexity 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 location of the concaveness 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 side is called the object-side surface of the lens, and the surface of each lens closest to the image side is called the image-side surface of the lens. The surface shape in the paraxial region can be determined according to the judgment method commonly used by those knowledgeable in the field, using the R value (R refers to the radius of curvature of the paraxial region, usually the R value in the lens database of optical software) to determine concavity or convexity. For the object-side surface, when the R value is positive, it is determined to be convex, and when the R value is negative, it is determined to be concave; for the image-side surface, when the R value is positive, it is determined to be concave, and when the R value is negative, it is determined to be convex.

[0055] To address the problem that existing optical imaging lenses cannot simultaneously achieve a wide-angle view and high image quality, this invention provides an optical imaging lens.

[0056] Example 1

[0057] like Figures 1 to 35 As shown, the optical imaging lens comprises, sequentially from the object side to the image side, a first lens, a second lens, a third lens, a fourth lens, a fifth lens, a sixth lens, and a seventh lens. The first lens has negative optical power and its object side is convex; the second lens has negative optical power and its object side is concave; the third lens has positive optical power; the fourth lens has positive optical power; the fifth lens has negative optical power and its object side is concave; the sixth lens has positive optical power; and the seventh lens has a convex object side and a concave image side. The maximum field of view (FOV) of the optical imaging lens satisfies 125°. <FOV<148°。

[0058] By reasonably distributing the optical power and surface shape of each lens through light, various aberrations of the system can be effectively balanced and corrected, astigmatism and distortion can be effectively reduced, and the imaging quality of the optical imaging lens can be greatly improved. By restricting the maximum field of view angle FOV of the optical imaging lens within the range of 125° to 148°, it is beneficial for the optical imaging lens to meet the field of view angle requirements, ensure that the imaging field of view range of the optical imaging lens is large enough, so as to realize a large wide-angle optical imaging lens. In addition, the optical imaging lens of the present application has the characteristics of miniaturization, large wide-angle and high image quality, meeting the actual application needs of users and the market, and improving the user's satisfaction.

[0059] Preferably, 133° < FOV < 139°.

[0060] It should be noted that the material of the third lens is glass, and both the object side and the image side of the third lens are aspherical surfaces.

[0061] In this embodiment, between the effective focal length f1 of the first lens and the effective focal length f2 of the second lens, it satisfies: 0 < f1 / f2 < 1.5. By reasonably planning the ratio between the effective focal length f1 of the first lens and the effective focal length f2 of the second lens, a reasonable distribution of negative optical power can be achieved, which is beneficial for correcting off-axis aberrations. Preferably, 0.3 < f1 / f2 < 1.4.

[0062] In this embodiment, between the curvature radius R1 of the object side of the first lens and the curvature radius R2 of the image side of the first lens, it satisfies: 0.7 < (R1 + R2) / (R1 - R2) < 1.5. By restricting the above conditional formula within a reasonable range, the shape of the first lens is restricted, which is beneficial for ensuring the processability of the first lens. Preferably, 1.0 < (R1 + R2) / (R1 - R2) < 1.4.

[0063] In this embodiment, between the curvature radius R6 of the image side of the third lens, the curvature radius R5 of the object side of the third lens and the effective focal length f3 of the third lens, it satisfies: 2.5 < (R5 - R6) / f3 < 6.5. Meeting this conditional formula restricts the shape of the third lens, which is beneficial for ensuring the processability of the third lens. Preferably, 3.1 < (R5 - R6) / f3 < x.3.

[0064] In this embodiment, between the curvature radius R8 of the image side of the fourth lens, the curvature radius R7 of the object side of the fourth lens and the effective focal length f4 of the fourth lens, it satisfies: 1.8 < (R7 - R8) / f4 < 2.5. Meeting this conditional formula restricts the shape of the fourth lens, which is beneficial for the system to balance aberrations. Preferably, 2.0 < (R7 - R8) / f4 < 2.2.

[0065] It should be noted that in the translation of , the "x.3" in the original text seems to be an incorrect expression. I have translated it as "6.3" according to the context and the general form of the formula. If there is any specific meaning for this incorrect expression, please let me know and I can adjust the translation accordingly.In this embodiment, the effective focal length f5 of the fifth lens, the effective focal length f6 of the sixth lens, and the effective focal length f of the optical imaging lens satisfy: 0.5 < (f5 + f6) / f < 3.8. Satisfying this conditional expression limits the proportions of the focal lengths of the fifth lens and the sixth lens in the system focal length, which is beneficial to correcting the lateral chromatic aberration of the system. Preferably, 0.6 < (f5 + f6) / f < 3.7.

[0066] In this embodiment, the on-axis distance TTL from the object side surface of the first lens to the imaging surface and the central thickness CT3 of the third lens on the optical axis satisfy: 4.1 < TTL / CT3 < 5.1. By planning the ratio of the on-axis distance TTL from the object side surface of the first lens to the imaging surface to the central thickness CT3 of the third lens on the optical axis within a reasonable range, the shape and position of the third lens are restricted, which is beneficial to ensuring the manufacturability of the third lens. At the same time, it is beneficial to reducing ghost images and ensuring the imaging quality. Preferably, 4.6 < TTL / CT3 < 5.0.

[0067] In this embodiment, the effective semi-aperture DT11 of the object side surface of the first lens and the effective semi-aperture DT41 of the object side surface of the fourth lens satisfy: 5.4 < DT11 / DT41 < 6.4. Satisfying this condition restricts the shape ratio of the first lens and the fourth lens, which is beneficial to improving the relative illumination. Preferably, 5.5 < DT11 / DT41 < 6.3.

[0068] In this embodiment, the effective semi-aperture DT72 of the image side surface of the seventh lens and the effective semi-aperture DT42 of the image side surface of the fourth lens satisfy: 2.1 < DT72 / DT42 < 2.8. Satisfying this conditional expression restricts the shape ratio of the fourth lens and the seventh lens. On the one hand, it is beneficial to ensuring the manufacturability of the lens, and on the other hand, it is beneficial to correcting off-axis aberrations. Preferably, 2.3 < DT72 / DT42 < 2.7.

[0069] In this embodiment, the on-axis distance SL from the aperture stop to the imaging surface, the central thickness CT4 of the fourth lens on the optical axis, the central thickness CT5 of the fifth lens on the optical axis, the central thickness CT6 of the sixth lens on the optical axis, and the central thickness CT7 of the seventh lens on the optical axis satisfy: 1.5 < SL / (CT4 + CT5 + CT6 + CT7) < 2.0. By restricting SL / (CT4 + CT5 + CT6 + CT7) within a reasonable range, the position of the aperture stop and the optical back focal length are restricted, which is beneficial to both correcting off-axis aberrations and reducing ghost images to improve the imaging quality. Preferably, 1.6 < SL / (CT4 + CT5 + CT6 + CT7) < 1.9.

[0070] In this embodiment, the combined focal length f23 of the second lens and the third lens, the edge thickness ET2 of the second lens, and the edge thickness ET3 of the third lens satisfy: 1.1 < f23 / (ET2 + ET3) < 1.8. Satisfying this conditional expression limits the shapes of the second lens and the third lens, which is beneficial to correcting the Petzval field curvature of the system and ensuring the processability of the lenses. Preferably, 1.3 < f23 / (ET2 + ET3) < 1.6.

[0071] In this embodiment, the center thickness CT1 of the first lens on the optical axis and the edge thickness ET1 of the first lens satisfy: 1.1 < ET1 / CT1 < 1.9. Satisfying this conditional expression limits the shape of the first lens, which is beneficial to ensuring the processability of the first lens. Preferably, 1.2 < ET1 / CT1 < 1.8.

[0072] In this embodiment, the edge thickness ET5 of the fifth lens, the edge thickness ET6 of the sixth lens, and the edge thickness ET7 of the seventh lens satisfy: 1.0 < (ET6 + ET7) / ET5 < 2.0. Satisfying this conditional expression limits the shapes of the fifth lens, the sixth lens, and the seventh lens, which is beneficial to ensuring the processability of the lenses and correcting the off-axis aberration of the system. Preferably, 1.1 < (ET6 + ET7) / ET5 < 1.9.

[0073] Embodiment Two

[0074] As Figures 1 to 35 shown, from the object side to the image side of the optical imaging lens, it sequentially includes a first lens, a second lens, a third lens, a fourth lens, a fifth lens, a sixth lens, and a seventh lens. The first lens has a negative optical power, and the object side surface of the first lens is convex; the second lens has a negative optical power, and the object side surface of the second lens is concave; the third lens has a positive optical power; the fourth lens has a positive optical power; the fifth lens has a negative optical power, and the object side surface of the fifth lens is concave; the sixth lens has a positive optical power; the object side surface of the seventh lens is convex, and the image side surface of the seventh lens is concave; wherein, the on-axis distance TTL from the object side surface of the first lens to the imaging surface and the center thickness CT3 of the third lens on the optical axis satisfy: 4.1 < TTL / CT3 < 5.1.

[0075] By reasonably distributing the optical power and surface shape of each lens through light, various aberrations of the system can be effectively balanced and corrected, astigmatism and distortion can be effectively reduced, and the imaging quality of the optical imaging lens can be greatly improved. By planning the ratio of the on-axis distance TTL from the object side of the first lens to the imaging surface to the central thickness CT3 of the third lens on the optical axis within a reasonable range, the shape and position of the third lens are restricted, which is beneficial to ensuring the processability of the third lens and at the same time beneficial to reducing ghost images and ensuring the imaging quality. In addition, the optical imaging lens of the present application has the characteristics of miniaturization, large wide angle and high image quality, meets the actual application needs of users and the market, and improves the user's satisfaction.

[0076] Preferably, 4.6 < TTL / CT3 < 5.0.

[0077] It should be noted that the material of the third lens is glass, and both the object side and the image side of the third lens are aspherical surfaces.

[0078] In this embodiment, the maximum field angle FOV of the optical imaging lens satisfies: 125° < FOV < 148°. By restricting the maximum field angle FOV of the optical imaging lens within the range of 125° to 148°, it is beneficial for the optical imaging lens to meet the field angle requirements, ensure that the imaging field of view range of the optical imaging lens is large enough, so as to realize an optical imaging lens with a large wide angle. Preferably, 133° < FOV < 139°.

[0079] In this embodiment, the ratio between the effective focal length f1 of the first lens and the effective focal length f2 of the second lens satisfies: 0 < f1 / f2 < 1.5. By reasonably planning the ratio between the effective focal length f1 of the first lens and the effective focal length f2 of the second lens, a reasonable distribution of negative optical power can be achieved, which is beneficial to correcting off-axis aberrations. Preferably, 0.3 < f1 / f2 < 1.4.

[0080] In this embodiment, the ratio between the curvature radius R1 of the object side of the first lens and the curvature radius R2 of the image side of the first lens satisfies: 0.7 < (R1 + R2) / (R1 - R2) < 1.5. By restricting the above conditional formula within a reasonable range, the shape of the first lens is restricted, which is beneficial to ensuring the processability of the first lens. Preferably, 1.0 < (R1 + R2) / (R1 - R2) < 1.4.

[0081] In this embodiment, the ratio between the curvature radius R6 of the image side of the third lens, the curvature radius R5 of the object side of the third lens and the effective focal length f3 of the third lens satisfies: 2.5 < (R5 - R6) / f3 < 6.5. Satisfying this conditional formula restricts the shape of the third lens, which is beneficial to ensuring the processability of the third lens. Preferably, 3.1 < (R5 - R6) / f3 < 6.3.

[0082] In this embodiment, the curvature radius R8 of the image side surface of the fourth lens, the curvature radius R7 of the object side surface of the fourth lens, and the effective focal length f4 of the fourth lens satisfy: 1.8 < (R7 - R8) / f4 < 2.5. Satisfying this conditional formula limits the shape of the fourth lens and is beneficial to the system for balancing aberrations. Preferably, 2.0 < (R7 - R8) / f4 < 2.2.

[0083] In this embodiment, the effective focal length f5 of the fifth lens, the effective focal length f6 of the sixth lens, and the effective focal length f of the optical imaging lens satisfy: 0.5 < (f5 + f6) / f < 3.8. Satisfying this conditional formula limits the proportions of the focal lengths of the fifth lens and the sixth lens in the system focal length and is beneficial to correcting the lateral chromatic aberration of the system. Preferably, 0.6 < (f5 + f6) / f < 3.7.

[0084] In this embodiment, the effective semi-aperture DT11 of the object side surface of the first lens and the effective semi-aperture DT41 of the object side surface of the fourth lens satisfy: 5.4 < DT11 / DT41 < 6.4. Satisfying this condition limits the shape ratio of the first lens and the fourth lens and is beneficial to improving the relative illumination. Preferably, 5.5 < DT11 / DT41 < 6.3.

[0085] In this embodiment, the effective semi-aperture DT72 of the image side surface of the seventh lens and the effective semi-aperture DT42 of the image side surface of the fourth lens satisfy: 2.1 < DT72 / DT42 < 2.8. Satisfying this conditional formula limits the shape ratio of the fourth lens and the seventh lens. On the one hand, it is beneficial to ensure the lens processability, and on the other hand, it is beneficial to correcting off-axis aberrations. Preferably, 2.3 < DT72 / DT42 < 2.7.

[0086] In this embodiment, the on-axis distance SL from the aperture stop to the imaging surface, the central thickness CT4 of the fourth lens on the optical axis, the central thickness CT5 of the fifth lens on the optical axis, the central thickness CT6 of the sixth lens on the optical axis, and the central thickness CT7 of the seventh lens on the optical axis satisfy: 1.5 < SL / (CT4 + CT5 + CT6 + CT7) < 2.0. By limiting SL / (CT4 + CT5 + CT6 + CT7) within a reasonable range, the position of the aperture stop and the optical back focal length are limited, which is beneficial to both correcting off-axis aberrations and reducing ghost images to improve the imaging quality. Preferably, 1.6 < SL / (CT4 + CT5 + CT6 + CT7) < 1.9.

[0087] In this embodiment, the combined focal length f23 of the second lens and the third lens, the edge thickness ET2 of the second lens, and the edge thickness ET3 of the third lens satisfy: 1.1 < f23 / (ET2 + ET3) < 1.8. Satisfying this conditional expression limits the shapes of the second lens and the third lens, which is beneficial to correcting the Petzval field curvature of the system and conducive to ensuring the processability of the lenses. Preferably, 1.3 < f23 / (ET2 + ET3) < 1.6.

[0088] In this embodiment, the central thickness CT1 of the first lens on the optical axis and the edge thickness ET1 of the first lens satisfy: 1.1 < ET1 / CT1 < 1.9. Satisfying this conditional expression limits the shape of the first lens, which is beneficial to ensuring the processability of the first lens. Preferably, 1.2 < ET1 / CT1 < 1.8.

[0089] In this embodiment, the edge thickness ET5 of the fifth lens, the edge thickness ET6 of the sixth lens, and the edge thickness ET7 of the seventh lens satisfy: 1.0 < (ET6 + ET7) / ET5 < 2.0. Satisfying this conditional expression limits the shapes of the fifth lens, the sixth lens, and the seventh lens, which is beneficial to ensuring the processability of the lenses and conducive to correcting the off-axis aberration of the system. Preferably, 1.1 < (ET6 + ET7) / ET5 < 1.9.

[0090] 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.

[0091] The optical imaging lens in this application can adopt multiple lenses, such as the seven lenses mentioned above. By reasonably distributing the optical power, surface shape, central thickness of each lens, and the on-axis distance between each lens, 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 optical imaging lens also has the advantages of wide angle, miniaturization, and good imaging quality, and can meet the requirements of miniaturization of smart electronic products.

[0092] In this application, at least one of the lens surfaces of each lens is an aspherical surface. The characteristics of an aspherical lens are that the curvature changes continuously from the center of the lens to the periphery of the lens. Different from a spherical lens with a constant curvature from the center of the lens to the periphery of the lens, an aspherical lens has better curvature radius characteristics and has the advantages of improving distortion aberration and astigmatism aberration. After adopting an aspherical lens, the aberration that appears during imaging can be eliminated as much as possible, thereby improving the imaging quality.

[0093] However, those skilled in the art will understand that the number of lenses constituting the optical imaging lens can be varied to obtain the various results and advantages described herein without departing from the technical solutions claimed in this application. For example, although five lenses are described as an example in the embodiments, the optical imaging lens is not limited to including five lenses. If necessary, the optical imaging lens may also include other numbers of lenses.

[0094] The following description, with reference to the accompanying drawings, further illustrates examples of specific surface shapes and parameters of optical imaging lenses applicable to the above embodiments.

[0095] It should be noted that any of the examples one through seven below are applicable to all embodiments of this application.

[0096] Example 1

[0097] like Figures 1 to 5 As shown, an optical imaging lens of Example 1 of this application is described. Figure 1 A schematic diagram of the optical imaging lens structure of Example 1 is shown.

[0098] like Figure 1 As shown, the optical imaging lens includes, from the object side to the image side, the following components in sequence: first lens E1, second lens E2, third lens E3, aperture stop STO, fourth lens E4, fifth lens E5, sixth lens E6, seventh lens E7, filter E8, and imaging surface S17.

[0099] The first lens E1 has negative optical power, its object-side surface S1 is convex, and its image-side surface S2 is concave. The second lens E2 has negative optical power, its object-side surface S3 is concave, and its image-side surface S4 is concave. The third lens E3 has positive optical power, its object-side surface S5 is convex, and its image-side surface S6 is convex. The fourth lens E4 has positive optical power, its object-side surface S7 is convex, and its image-side surface S8 is convex. The fifth lens E5 has negative optical power, its object-side surface S9 is concave, and its image-side surface S10 is concave. The sixth lens E6 has positive optical power, its object-side surface S11 is convex, and its image-side surface S12 is concave. The seventh lens E7 has negative optical power, its object-side surface S13 is convex, and its image-side surface S14 is concave. The filter E8 has an object-side surface S15 and an image-side surface S16. Light from the object passes sequentially through each surface S1 to S16 and is finally imaged onto the imaging surface S17.

[0100] In this example, the total effective focal length f of the optical imaging lens is 1.52 mm, the maximum field of view FOV of the optical imaging lens is 138.4°, the total system length TTL of the optical imaging lens is 12.13 mm, and the image height ImgH is 2.93 mm.

[0101] Table 1 shows the basic structural parameters of the optical imaging lens in Example 1, where the units for radius of curvature, thickness / distance, focal length, and effective radius are all millimeters (mm).

[0102]

[0103] Table 1

[0104] In Example 1, the object-side surface and image-side surface of any one of the lenses from the first lens E1 to the seventh lens E7 are aspherical. The surface shape of each aspherical lens can be defined using, but is not limited to, the following aspherical formula:

[0105]

[0106] Where x is the distance vector from the vertex of the aspherical surface at a height h along the optical axis; c is the paraxial curvature of the aspherical surface, c = 1 / R (i.e., the paraxial curvature c is the reciprocal of the radius of curvature R in Table 1 above); k is the conic coefficient; Ai is the i-th order correction coefficient of the aspherical surface. Table 2 below gives the higher-order coefficients A4, A6, A8, A10, A12, A14, A16, A18, and A20 that can be used for the aspherical mirrors S1-S14 in Example 1.

[0107] Face number A4 A6 A8 A10 A12 A14 A16 A18 A20 S1 8.7873E-03 -1.0969E-03 1.0677E-04 -8.8638E-06 5.5229E-07 -2.3795E-08 6.6708E-10 -1.0942E-11 7.9495E-14 S2 -1.4579E-02 6.8372E-03 -2.8671E-03 8.6426E-04 -1.7961E-04 2.6169E-05 -2.5502E-06 1.4385E-07 -3.4673E-09 S3 3.9540E-02 -1.1499E-02 3.8051E-03 -1.1212E-03 2.0433E-04 -2.1737E-05 1.3120E-06 -4.0552E-08 4.6411E-10 S4 1.2036E-01 -3.7711E-02 1.0075E-02 5.7268E-03 -9.4610E-03 4.5325E-03 -1.0550E-03 1.2288E-04 -5.7238E-06 S5 1.8756E-02 -1.5141E-02 8.6067E-03 -3.3230E-03 4.6398E-04 4.9024E-05 -1.9055E-05 1.3983E-06 0.0000E+00 S6 9.5406E-03 -9.2330E-03 5.8580E-03 -2.2048E-03 5.3539E-04 -5.8243E-05 0.0000E+00 0.0000E+00 0.0000E+00 S7 1.3815E-02 -2.5324E-02 -6.2493E-02 2.3042E-01 -7.0947E-01 9.0070E-01 -4.9603E-01 0.0000E+00 0.0000E+00 S8 -1.2164E-01 1.5414E-01 3.5972E-03 -9.7767E-01 2.1050E+00 -1.8182E+00 5.7119E-01 0.0000E+00 0.0000E+00 S9 -3.4703E-01 5.4434E-01 -3.5954E-01 -1.1121E+00 2.9734E+00 -2.6465E+00 8.3804E-01 0.0000E+00 0.0000E+00 S10 -3.3846E-01 7.7827E-01 -1.2273E+00 1.4406E+00 -1.1272E+00 5.4178E-01 -1.1632E-01 0.0000E+00 0.0000E+00 S11 -9.5433E-03 1.1844E-01 -4.0707E-01 8.2619E-01 -1.1953E+00 1.1370E+00 -6.6885E-01 2.1912E-01 -3.0412E-02 S12 9.1224E-02 -3.2964E-02 9.7605E-03 -2.9768E-02 3.1896E-02 -1.6510E-02 4.7147E-03 -7.1915E-04 4.5947E-05 S13 -5.0699E-02 -1.1518E-01 2.0502E-01 -1.6926E-01 8.1498E-02 -2.3768E-02 4.1362E-03 -3.9601E-04 1.6077E-05 S14 1.1020E-01 -2.2950E-01 1.8613E-01 -9.2304E-02 2.9552E-02 -6.1381E-03 7.9558E-04 -5.8114E-05 1.8139E-06

[0108] Table 2

[0109] Figure 2 The on-axis chromatic aberration curve of an optical imaging lens in Example 1 is shown, which indicates the deflection 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 in Example 1 is shown, which represents the curvature of the meridional image plane and the curvature of the sagittal image plane. Figure 4 The distortion curve of the optical imaging lens in Example 1 is shown, which represents the distortion magnitude corresponding to different field of view angles. Figure 5 The magnification chromatic aberration curve of the optical imaging lens in Example 1 is shown, which represents the deviation of light at different image heights on the imaging plane after passing through the optical imaging lens.

[0110] according to Figures 2 to 5 As can be seen, the optical imaging lens given in Example 1 can achieve good image quality.

[0111] Example 2

[0112] like Figures 6 to 10 The image shows an optical imaging lens of Example 2 of this application. For the sake of brevity, descriptions similar to those in Example 1 will be omitted in this example and the following examples. Figure 6 A schematic diagram of the optical imaging lens structure of Example 2 is shown.

[0113] like Figure 6 As shown, the optical imaging lens includes, from the object side to the image side, the following components in sequence: first lens E1, second lens E2, third lens E3, aperture stop STO, fourth lens E4, fifth lens E5, sixth lens E6, seventh lens E7, filter E8, and imaging surface S17.

[0114] The first lens E1 has negative optical power, its object-side surface S1 is convex, and its image-side surface S2 is concave. The second lens E2 has negative optical power, its object-side surface S3 is concave, and its image-side surface S4 is concave. The third lens E3 has positive optical power, its object-side surface S5 is convex, and its image-side surface S6 is convex. The fourth lens E4 has positive optical power, its object-side surface S7 is convex, and its image-side surface S8 is convex. The fifth lens E5 has negative optical power, its object-side surface S9 is concave, and its image-side surface S10 is concave. The sixth lens E6 has positive optical power, its object-side surface S11 is convex, and its image-side surface S12 is convex. The seventh lens E7 has negative optical power, its object-side surface S13 is convex, and its image-side surface S14 is concave. The filter E8 has an object-side surface S15 and an image-side surface S16. Light from the object passes sequentially through each surface S1 to S16 and is finally imaged onto the imaging surface S17.

[0115] In this example, the total effective focal length f of the optical imaging lens is 1.66 mm, the maximum field of view FOV of the optical imaging lens is 137.8°, the total system length TTL of the optical imaging lens is 11.44 mm, and the image height ImgH is 3.05 mm.

[0116] Table 3 shows the basic structural parameters of the optical imaging lens in Example 2, where the units for radius of curvature, thickness / distance, focal length, and effective radius are all millimeters (mm).

[0117]

[0118] Table 3

[0119] Table 4 shows the higher-order coefficients that can be used for each aspherical mirror in Example 2, wherein each aspherical surface shape can be defined by formula (1) given in Example 2 above.

[0120]

[0121]

[0122] Table 4

[0123] Figure 7 The on-axis chromatic aberration curve of the optical imaging lens in Example 2 is shown, which indicates the deflection 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 in Example 2 is shown, which represents the curvature of the meridional image plane and the curvature of the sagittal image plane. Figure 9 The distortion curve of the optical imaging lens in Example 2 is shown, which represents the distortion magnitude corresponding to different field of view angles. Figure 10 The magnification chromatic aberration curve of the optical imaging lens in Example 2 is shown, which represents the deviation of light at different image heights on the imaging plane after passing through the optical imaging lens.

[0124] according to Figures 7 to 10 As can be seen, the optical imaging lens given in Example 2 can achieve good imaging quality.

[0125] Example 3

[0126] like Figures 11 to 15 As shown, an optical imaging lens of Example 3 of this application is described. Figure 11 A schematic diagram of the optical imaging lens structure of Example 3 is shown.

[0127] like Figure 11 As shown, the optical imaging lens includes, from the object side to the image side, the following components in sequence: first lens E1, second lens E2, third lens E3, aperture stop STO, fourth lens E4, fifth lens E5, sixth lens E6, seventh lens E7, filter E8, and imaging surface S17.

[0128] The first lens E1 has negative optical power, its object-side surface S1 is convex, and its image-side surface S2 is concave. The second lens E2 has negative optical power, its object-side surface S3 is concave, and its image-side surface S4 is concave. The third lens E3 has positive optical power, its object-side surface S5 is convex, and its image-side surface S6 is convex. The fourth lens E4 has positive optical power, its object-side surface S7 is convex, and its image-side surface S8 is convex. The fifth lens E5 has negative optical power, its object-side surface S9 is concave, and its image-side surface S10 is concave. The sixth lens E6 has positive optical power, its object-side surface S11 is convex, and its image-side surface S12 is convex. The seventh lens E7 has negative optical power, its object-side surface S13 is convex, and its image-side surface S14 is concave. The filter E8 has an object-side surface S15 and an image-side surface S16. Light from the object passes sequentially through each surface S1 to S16 and is finally imaged onto the imaging surface S17.

[0129] In this example, the total effective focal length f of the optical imaging lens is 1.79 mm, the maximum field of view FOV of the optical imaging lens is 133.8°, the total system length TTL of the optical imaging lens is 11.35 mm, and the image height ImgH is 2.93 mm.

[0130] Table 5 shows the basic structural parameters of the optical imaging lens in Example 3, where the units for radius of curvature, thickness / distance, focal length, and effective radius are all millimeters (mm).

[0131]

[0132]

[0133] Table 5

[0134] Table 6 shows the higher-order coefficients that can be used for each aspherical mirror in Example 3, wherein each aspherical surface shape can be defined by formula (1) given in Example 3 above.

[0135] Face number A4 A6 A8 A10 A12 A14 A16 A18 A20 S1 2.1164E-02 -5.0352E-03 6.4265E-04 -5.2808E-05 2.9951E-06 -1.1768E-07 3.0627E-09 -4.7340E-11 3.2808E-13 S2 2.9419E-02 1.0766E-02 -1.9156E-02 1.1281E-02 -4.2471E-03 1.0078E-03 -1.4301E-04 1.1056E-05 -3.5923E-07 S3 4.9666E-02 4.6526E-03 -1.4634E-02 3.6764E-03 5.3859E-04 -4.2281E-04 8.4725E-05 -7.7454E-06 2.7837E-07 S4 7.1663E-02 4.6254E-02 -8.3676E-02 6.6017E-02 -3.4531E-02 1.0844E-02 -1.5029E-03 -2.5925E-05 1.8899E-05 S5 6.4430E-03 1.3077E-03 -9.9741E-03 1.4773E-02 -1.5538E-02 9.6054E-03 -3.2808E-03 5.7922E-04 -4.1444E-05 S6 5.4889E-03 4.2067E-03 -2.1372E-02 3.0989E-02 -2.2547E-02 8.3154E-03 -1.2247E-03 0.0000E+00 0.0000E+00 S7 1.7634E-02 -8.8824E-02 3.1613E-01 -9.1123E-01 9.4627E-01 3.1972E-01 -1.4152E+00 7.5757E-01 0.0000E+00 S8 -1.8826E-01 3.7576E-01 -6.3028E-01 5.2240E-01 1.6958E-01 -7.1356E-01 4.7799E-01 -9.5585E-02 0.0000E+00 S9 -3.4528E-01 7.5150E-01 -1.2232E+00 1.6611E+00 -2.4485E+00 4.0036E+00 -4.6830E+00 2.9080E+00 -7.1107E-01 S10 -2.2526E-01 6.2143E-01 -1.4037E+00 2.8665E+00 -4.4083E+00 4.6179E+00 -3.0420E+00 1.1225E+00 -1.7596E-01 S11 -2.4545E-02 1.8448E-01 -5.7324E-01 1.0713E+00 -1.3670E+00 1.1589E+00 -6.2046E-01 1.8919E-01 -2.5074E-02 S12 1.0713E-01 -6.2394E-02 6.1287E-02 -9.7918E-02 9.1404E-02 -4.8824E-02 1.5176E-02 -2.5733E-03 1.8458E-04 S13 -2.7258E-02 -7.7951E-02 1.2929E-01 -9.7855E-02 4.2145E-02 -1.0859E-02 1.6625E-03 -1.3998E-04 5.0025E-06 S14 -3.3611E-02 -6.5404E-02 7.1459E-02 -3.8549E-02 1.2458E-02 -2.5512E-03 3.2632E-04 -2.3719E-05 7.4246E-07

[0136] Table 6

[0137] Figure 12 The on-axis chromatic aberration curve of the optical imaging lens in Example 3 is shown, which indicates the deflection of the focal point of light of different wavelengths after passing through the optical imaging lens. Figure 13 The astigmatism curve of the optical imaging lens in Example 3 is shown, which represents the curvature of the meridional image plane and the curvature of the sagittal image plane. Figure 14 The distortion curve of the optical imaging lens in Example 3 is shown, which represents the distortion magnitude corresponding to different field of view angles. Figure 15 The magnification chromatic aberration curve of the optical imaging lens in Example 3 is shown, which represents the deviation of light at different image heights on the imaging plane after passing through the optical imaging lens.

[0138] according to Figures 12 to 15 As can be seen, the optical imaging lens given in Example 3 can achieve good imaging quality.

[0139] Example 4

[0140] like Figures 16 to 20 As shown, an optical imaging lens of Example 4 of this application is described. Figure 16 A schematic diagram of the optical imaging lens structure of Example 4 is shown.

[0141] like Figure 16As shown, the optical imaging lens includes, from the object side to the image side, the following components in sequence: first lens E1, second lens E2, third lens E3, aperture stop STO, fourth lens E4, fifth lens E5, sixth lens E6, seventh lens E7, filter E8, and imaging surface S17.

[0142] The first lens E1 has negative optical power, its object-side surface S1 is convex, and its image-side surface S2 is concave. The second lens E2 has negative optical power, its object-side surface S3 is concave, and its image-side surface S4 is concave. The third lens E3 has positive optical power, its object-side surface S5 is convex, and its image-side surface S6 is convex. The fourth lens E4 has positive optical power, its object-side surface S7 is convex, and its image-side surface S8 is convex. The fifth lens E5 has negative optical power, its object-side surface S9 is concave, and its image-side surface S10 is concave. The sixth lens E6 has positive optical power, its object-side surface S11 is convex, and its image-side surface S12 is convex. The seventh lens E7 has negative optical power, its object-side surface S13 is convex, and its image-side surface S14 is concave. The filter E8 has an object-side surface S15 and an image-side surface S16. Light from the object passes sequentially through each surface S1 to S16 and is finally imaged onto the imaging surface S17.

[0143] In this example, the total effective focal length f of the optical imaging lens is 1.63 mm, the maximum field of view FOV of the optical imaging lens is 134.1°, the total system length TTL of the optical imaging lens is 11.92 mm, and the image height ImgH is 2.93 mm.

[0144] Table 7 shows the basic structural parameters of the optical imaging lens in Example 4, where the units for radius of curvature, thickness / distance, focal length, and effective radius are all millimeters (mm).

[0145]

[0146]

[0147] Table 7

[0148] Table 8 shows the higher-order coefficients that can be used for each aspherical mirror in Example 4, wherein each aspherical surface shape can be defined by formula (1) given in Example 4 above.

[0149] Face number A4 A6 A8 A10 A12 A14 A16 A18 A20 S1 2.1157E-02 -4.9281E-03 6.0938E-04 -4.7831E-05 2.5147E-06 -8.8777E-08 2.0310E-09 -2.7359E-11 1.6552E-13 S2 2.1972E-02 4.6770E-03 -1.1083E-02 5.7216E-03 -1.6704E-03 2.9932E-04 -3.2668E-05 2.0028E-06 -5.3188E-08 S3 4.3177E-02 1.9062E-02 -3.0258E-02 1.4041E-02 -3.5479E-03 5.4626E-04 -5.1547E-05 2.7580E-06 -6.4330E-08 S4 8.0810E-02 5.1094E-02 -6.9730E-02 1.7578E-02 9.2570E-03 -7.9640E-03 2.5799E-03 -4.2107E-04 2.8446E-05 S5 1.1135E-02 3.4346E-03 -1.3048E-02 9.8948E-03 -5.6133E-03 2.4832E-03 -6.9928E-04 1.0611E-04 -6.5902E-06 S6 8.2477E-03 -4.1718E-03 -1.7266E-03 4.3986E-03 -2.9372E-03 8.9209E-04 -1.0684E-04 0.0000E+00 0.0000E+00 S7 2.3081E-02 -8.5129E-02 3.1686E-01 -1.0211E+00 1.6899E+00 -1.4791E+00 5.1009E-01 0.0000E+00 0.0000E+00 S8 -1.1559E-01 1.1832E-01 -3.8432E-02 -6.9791E-01 1.9223E+00 -2.1425E+00 1.0742E+00 -1.9020E-01 0.0000E+00 S9 -2.4970E-01 3.1732E-01 -1.1294E-01 -8.1998E-01 1.5060E+00 4.9239E-02 -2.2698E+00 2.0572E+00 -5.7220E-01 S10 -1.9136E-01 2.4718E-01 -8.4777E-02 -1.8677E-01 3.3608E-01 -2.1392E-01 4.9389E-02 0.0000E+00 0.0000E+00 S11 -6.8157E-03 2.5231E-02 -7.8253E-02 1.1326E-01 -1.2414E-01 9.8021E-02 -5.3932E-02 1.8273E-02 -2.8498E-03 S12 1.0978E-01 -5.7979E-02 1.0919E-02 5.9807E-03 -7.3648E-03 3.7499E-03 -1.0608E-03 1.5863E-04 -9.7411E-06 S13 -2.5010E-02 -6.3387E-02 8.4710E-02 -5.8481E-02 2.4023E-02 -5.9553E-03 8.7536E-04 -7.0456E-05 2.3975E-06 S14 3.2942E-02 -1.3434E-01 1.1108E-01 -5.3689E-02 1.6468E-02 -3.2555E-03 4.0106E-04 -2.7854E-05 8.2775E-07

[0150] Table 8

[0151] Figure 17The on-axis chromatic aberration curve of the optical imaging lens in Example 4 is shown, which indicates the deflection of the focal point of light of different wavelengths after passing through the optical imaging lens. Figure 18 The astigmatism curves of the optical imaging lens in Example 4 are shown, representing the meridional image plane curvature and the sagittal image plane curvature. Figure 19 The distortion curve of the optical imaging lens in Example 4 is shown, which represents the distortion magnitude corresponding to different field of view angles. Figure 20 The magnification chromatic aberration curve of the optical imaging lens in Example 4 is shown, which represents the deviation of light at different image heights on the imaging plane after passing through the optical imaging lens.

[0152] according to Figures 17 to 20 As can be seen, the optical imaging lens given in Example 4 can achieve good imaging quality.

[0153] Example 5

[0154] like Figures 21 to 25 As shown, an optical imaging lens of Example 5 of this application is described. Figure 21 A schematic diagram of the optical imaging lens structure of Example 5 is shown.

[0155] like Figure 21 As shown, the optical imaging lens includes, from the object side to the image side, the following components in sequence: first lens E1, second lens E2, third lens E3, aperture stop STO, fourth lens E4, fifth lens E5, sixth lens E6, seventh lens E7, filter E8, and imaging surface S17.

[0156] The first lens E1 has negative optical power, its object-side surface S1 is convex, and its image-side surface S2 is concave. The second lens E2 has negative optical power, its object-side surface S3 is concave, and its image-side surface S4 is concave. The third lens E3 has positive optical power, its object-side surface S5 is convex, and its image-side surface S6 is convex. The fourth lens E4 has positive optical power, its object-side surface S7 is convex, and its image-side surface S8 is convex. The fifth lens E5 has negative optical power, its object-side surface S9 is concave, and its image-side surface S10 is concave. The sixth lens E6 has positive optical power, its object-side surface S11 is convex, and its image-side surface S12 is concave. The seventh lens E7 has positive optical power, its object-side surface S13 is convex, and its image-side surface S14 is concave. The filter E8 has an object-side surface S15 and an image-side surface S16. Light from the object passes sequentially through each surface S1 to S16 and is finally imaged onto the imaging surface S17.

[0157] In this example, the total effective focal length f of the optical imaging lens is 1.68 mm, the maximum field of view FOV of the optical imaging lens is 135.9°, the total system length TTL of the optical imaging lens is 11.48 mm, and the image height ImgH is 2.93 mm.

[0158] Table 9 shows the basic structural parameters of the optical imaging lens in Example 5, where the units for radius of curvature, thickness / distance, focal length, and effective radius are all millimeters (mm).

[0159]

[0160] Table 9

[0161] Table 10 shows the higher-order coefficients that can be used for each aspherical mirror in Example 5, wherein each aspherical surface shape can be defined by formula (1) given in Example 5 above.

[0162]

[0163]

[0164] Table 10

[0165] Figure 22 The on-axis chromatic aberration curve of the optical imaging lens in Example 5 is shown, which indicates the deflection of the focal point of light of different wavelengths after passing through the optical imaging lens. Figure 23 The astigmatism curves of the optical imaging lens in Example 5 are shown, representing the meridional image plane curvature and the sagittal image plane curvature. Figure 24 The distortion curve of the optical imaging lens in Example 5 is shown, which represents the distortion magnitude corresponding to different field of view angles. Figure 25 The magnification chromatic aberration curve of the optical imaging lens in Example 5 is shown, which represents the deviation of light at different image heights on the imaging plane after passing through the optical imaging lens.

[0166] according to Figures 22 to 25 As can be seen, the optical imaging lens given in Example 5 can achieve good imaging quality.

[0167] Example 6

[0168] like Figures 26 to 30 As shown, an optical imaging lens of Example Six of this application is described. Figure 26 A schematic diagram of the optical imaging lens structure of Example Six is ​​shown.

[0169] like Figure 26 As shown, the optical imaging lens includes, from the object side to the image side, the following components in sequence: first lens E1, second lens E2, third lens E3, aperture stop STO, fourth lens E4, fifth lens E5, sixth lens E6, seventh lens E7, filter E8, and imaging surface S17.

[0170] The first lens E1 has negative optical power, its object-side surface S1 is convex, and its image-side surface S2 is concave. The second lens E2 has negative optical power, its object-side surface S3 is concave, and its image-side surface S4 is convex. The third lens E3 has positive optical power, its object-side surface S5 is convex, and its image-side surface S6 is convex. The fourth lens E4 has positive optical power, its object-side surface S7 is convex, and its image-side surface S8 is convex. The fifth lens E5 has negative optical power, its object-side surface S9 is concave, and its image-side surface S10 is convex. The sixth lens E6 has positive optical power, its object-side surface S11 is convex, and its image-side surface S12 is concave. The seventh lens E7 has negative optical power, its object-side surface S13 is convex, and its image-side surface S14 is concave. The filter E8 has an object-side surface S15 and an image-side surface S16. Light from the object passes sequentially through each surface S1 to S16 and is finally imaged onto the imaging surface S17.

[0171] In this example, the total effective focal length f of the optical imaging lens is 1.70 mm, the maximum field of view FOV of the optical imaging lens is 135.5°, the total system length TTL of the optical imaging lens is 11.28 mm, and the image height ImgH is 2.93 mm.

[0172] Table 11 shows the basic structural parameters of the optical imaging lens of Example 6, where the units for radius of curvature, thickness / distance, focal length, and effective radius are all millimeters (mm).

[0173]

[0174] Table 11

[0175] Table 12 shows the higher-order coefficients that can be used for each aspherical mirror in Example 6, wherein each aspherical surface shape can be defined by formula (1) given in Example 6 above.

[0176] Face number A4 A6 A8 A10 A12 A14 A16 A18 A20 S1 1.3823E-02 -2.3140E-03 1.8497E-04 -8.5206E-06 2.8373E-07 -9.7340E-09 3.2719E-10 -6.9775E-12 6.2576E-14 S2 2.8956E-02 -1.1851E-04 -2.4214E-03 1.9265E-03 -1.2984E-03 4.2253E-04 -7.1430E-05 6.3148E-06 -2.3885E-07 S3 7.1164E-02 -2.5902E-02 -3.0863E-03 4.9884E-03 -1.5622E-03 2.3377E-04 -1.6678E-05 3.2801E-07 1.2890E-08 S4 8.2691E-02 -8.4419E-03 -5.2072E-02 5.7297E-02 -3.3256E-02 1.2087E-02 -2.6934E-03 3.3296E-04 -1.7330E-05 S5 8.0464E-03 2.6189E-03 -1.7916E-02 1.9691E-02 -1.3292E-02 5.8289E-03 -1.5547E-03 2.2614E-04 -1.3709E-05 S6 5.9001E-03 3.3621E-03 -1.3931E-02 1.6809E-02 -1.0348E-02 3.2240E-03 -4.0108E-04 0.0000E+00 0.0000E+00 S7 3.8230E-02 -1.3044E-01 5.7714E-01 -1.5574E+00 1.1058E+00 2.4038E+00 -5.1030E+00 2.6439E+00 0.0000E+00 S8 -1.3645E-01 3.4144E-02 -1.4453E-01 2.2692E+00 -8.0082E+00 1.2473E+01 -9.4194E+00 2.8355E+00 0.0000E+00 S9 -3.2045E-01 9.2999E-01 -4.5549E+00 1.9637E+01 -5.2356E+01 8.3658E+01 -7.9140E+01 4.1002E+01 -8.9330E+00 S10 -2.3289E-01 6.1239E-01 -1.2235E+00 2.2582E+00 -2.7656E+00 1.8656E+00 -4.5057E-01 -1.4568E-01 7.7975E-02 S11 5.7092E-03 7.5753E-02 -2.3635E-01 3.3560E-01 -2.9664E-01 1.5826E-01 -4.6065E-02 4.9024E-03 2.9094E-04 S12 1.7210E-01 -1.5472E-01 8.7001E-02 -3.6839E-02 1.0550E-02 -1.8680E-03 2.0206E-04 -1.6072E-05 9.5153E-07 S13 7.3008E-02 -2.1223E-01 2.2222E-01 -1.4338E-01 5.8447E-02 -1.4821E-02 2.2625E-03 -1.9048E-04 6.8017E-06 S14 -4.7684E-02 -5.2712E-02 5.1799E-02 -2.4828E-02 6.8626E-03 -1.1297E-03 1.0413E-04 -4.2829E-06 1.6824E-08

[0177] Table 12

[0178] Figure 27 The on-axis chromatic aberration curve of the optical imaging lens in Example Six is ​​shown, which represents the deflection of the focal point of light of different wavelengths after passing through the optical imaging lens. Figure 28 The astigmatism curves of the optical imaging lens in Example Six are shown, representing the meridional image plane curvature and the sagittal image plane curvature. Figure 29 The distortion curve of the optical imaging lens in Example 6 is shown, which represents the distortion magnitude corresponding to different field of view angles. Figure 30The magnification chromatic aberration curve of the optical imaging lens in Example Six is ​​shown, which represents the deviation of light at different image heights on the imaging plane after passing through the optical imaging lens.

[0179] according to Figures 27 to 30 As can be seen, the optical imaging lens given in Example 6 can achieve good imaging quality.

[0180] Example 7

[0181] like Figures 31 to 35 As shown, an optical imaging lens of Example Seven of this application is described. Figure 31 A schematic diagram of the optical imaging lens structure of Example 7 is shown.

[0182] like Figure 31 As shown, the optical imaging lens includes, from the object side to the image side, the following components in sequence: first lens E1, second lens E2, third lens E3, aperture stop STO, fourth lens E4, fifth lens E5, sixth lens E6, seventh lens E7, filter E8, and imaging surface S17.

[0183] The first lens E1 has negative optical power, its object-side surface S1 is convex, and its image-side surface S2 is concave. The second lens E2 has negative optical power, its object-side surface S3 is concave, and its image-side surface S4 is convex. The third lens E3 has positive optical power, its object-side surface S5 is convex, and its image-side surface S6 is convex. The fourth lens E4 has positive optical power, its object-side surface S7 is convex, and its image-side surface S8 is convex. The fifth lens E5 has negative optical power, its object-side surface S9 is concave, and its image-side surface S10 is concave. The sixth lens E6 has positive optical power, its object-side surface S11 is convex, and its image-side surface S12 is concave. The seventh lens E7 has positive optical power, its object-side surface S13 is convex, and its image-side surface S14 is concave. The filter E8 has an object-side surface S15 and an image-side surface S16. Light from the object passes sequentially through each surface S1 to S16 and is finally imaged onto the imaging surface S17.

[0184] In this example, the total effective focal length f of the optical imaging lens is 1.63 mm, the maximum field of view FOV of the optical imaging lens is 137.3°, the total system length TTL of the optical imaging lens is 11.33 mm, and the image height ImgH is 2.93 mm.

[0185] Table 13 shows the basic structural parameters of the optical imaging lens of Example 7, where the units for radius of curvature, thickness / distance, focal length, and effective radius are all millimeters (mm).

[0186]

[0187]

[0188] Table 13

[0189] Table 14 shows the higher-order coefficients that can be used for each aspherical mirror in Example 7, wherein each aspherical surface shape can be defined by formula (1) given in Example 7 above.

[0190] Face number A4 A6 A8 A10 A12 A14 A16 A18 A20 S1 1.1676E-02 -1.1269E-03 -4.4850E-06 8.1714E-06 -6.7303E-07 2.7730E-08 -6.5626E-10 8.6783E-12 -5.0843E-14 S2 2.5078E-02 -2.2881E-03 3.1159E-03 -1.0470E-03 -2.1024E-04 1.1896E-04 -1.6006E-05 7.2560E-07 -7.0300E-09 S3 6.3951E-02 -2.7139E-02 4.4849E-04 4.2666E-03 -1.9734E-03 4.7271E-04 -6.7924E-05 5.5616E-06 -1.9888E-07 S4 8.0581E-02 -2.5203E-02 -2.0345E-02 2.7512E-02 -1.4891E-02 4.4739E-03 -6.8334E-04 3.0611E-05 2.3117E-06 S5 8.0464E-03 2.6189E-03 -1.7916E-02 1.9691E-02 -1.3292E-02 5.8289E-03 -1.5547E-03 2.2614E-04 -1.3709E-05 S6 5.9001E-03 3.3621E-03 -1.3931E-02 1.6809E-02 -1.0348E-02 3.2240E-03 -4.0108E-04 0.0000E+00 0.0000E+00 S7 3.9430E-02 -1.4249E-01 6.2048E-01 -1.4704E+00 -1.1854E-01 6.0090E+00 -9.8184E+00 4.9945E+00 0.0000E+00 S8 -1.6485E-01 6.5510E-03 -4.9910E-01 5.1975E+00 -1.7312E+01 2.7165E+01 -2.0983E+01 6.5049E+00 0.0000E+00 S9 -3.7984E-01 1.4916E+00 -9.2368E+00 4.2330E+01 -1.1775E+02 1.9735E+02 -1.9662E+02 1.0775E+02 -2.4999E+01 S10 -2.9824E-01 1.1872E+00 -3.5486E+00 8.1667E+00 -1.2479E+01 1.2209E+01 -7.3605E+00 2.5011E+00 -3.6802E-01 S11 -3.1622E-02 3.0667E-01 -9.0966E-01 1.4952E+00 -1.5797E+00 1.0828E+00 -4.6531E-01 1.1329E-01 -1.1833E-02 S12 1.5284E-01 -9.4578E-02 -1.5282E-02 6.2351E-02 -4.8582E-02 2.0366E-02 -4.9600E-03 6.6121E-04 -3.7564E-05 S13 1.3074E-01 -3.1511E-01 3.3886E-01 -2.2366E-01 9.2601E-02 -2.3904E-02 3.7372E-03 -3.2434E-04 1.2007E-05 S14 -7.5165E-02 -9.2473E-03 6.4660E-03 6.0098E-03 -6.4031E-03 2.4388E-03 -4.7918E-04 4.8779E-05 -2.0434E-06

[0191] Table 14

[0192] Figure 32 The on-axis chromatic aberration curve of the optical imaging lens in Example 7 is shown, which represents the deflection of the focal point of light of different wavelengths after passing through the optical imaging lens. Figure 33 The astigmatism curves of the optical imaging lens in Example 7 are shown, representing the meridional image plane curvature and the sagittal image plane curvature. Figure 34 The distortion curve of the optical imaging lens in Example 7 is shown, which represents the distortion magnitude corresponding to different field of view angles. Figure 35 The magnification chromatic aberration curve of the optical imaging lens in Example 7 is shown, which represents the deviation of light at different image heights on the imaging plane after passing through the optical imaging lens.

[0193] according to Figures 32 to 35 As can be seen, the optical imaging lens given in Example 7 can achieve good imaging quality.

[0194] In summary, Examples 1 through 7 satisfy the relationships shown in Table 15.

[0195] Conditional / Example 1 2 3 4 5 6 7 FOV (°) 138.4 137.8 133.8 134.1 135.9 135.5 137.3 f1 / f2 1.38 0.65 0.31 0.88 0.66 0.34 0.31 (R1+R2) / (R1-R2) 1.32 1.17 1.09 1.25 1.11 1.12 1.10 (R5-R6) / f3 3.10 4.00 6.29 3.89 3.84 3.84 3.84 (R7-R8) / f4 2.09 2.12 2.10 2.07 2.07 2.10 2.08 (f5+f6) / f 0.78 0.60 1.14 0.92 3.68 2.62 2.74 TTL / CT3 4.62 4.77 4.73 4.96 4.76 4.68 4.70 DT11 / DT41 6.09 6.07 5.95 5.59 5.90 6.27 6.21 DT72 / DT42 2.54 2.46 2.60 2.39 2.48 2.62 2.65 SL / (CT4+CT5+CT6+CT7) 1.63 1.88 1.87 1.73 1.70 1.82 1.78 f23 / (ET2+ET3) 1.52 1.57 1.45 1.60 1.51 1.40 1.38 ET1 / CT1 1.35 1.27 1.39 1.32 1.47 1.76 1.79 (ET6+ET7) / ET5 1.90 1.47 1.59 1.58 1.47 1.34 1.14

[0196] Tables 15 and 16 show the effective focal length f of the optical imaging lenses for Examples 1 to 7, with each lens having an effective focal length f1 to f7.

[0197] Example parameters 1 2 3 4 5 6 7 f1(mm) -6.64 -5.10 -4.44 -5.42 -5.01 -4.46 -4.29 f2 (mm) -4.81 -7.90 -14.27 -6.17 -7.59 -13.00 -14.00 f3 (mm) 3.85 3.95 4.08 3.83 3.77 3.77 3.77 f4 (mm) 2.78 3.08 3.04 2.93 2.72 2.87 2.69 f5 (mm) -2.46 -3.19 -3.48 -3.32 -2.95 -3.10 -2.74 f6 (mm) 3.64 4.18 5.51 4.82 9.15 7.56 7.19 f7 (mm) -58.59 -9.51 -7.77 -10.79 342.93 -129.62 130.63 f(mm) 1.52 1.66 1.79 1.63 1.68 1.70 1.63 TTL(mm) 12.13 11.44 11.35 11.92 11.48 11.28 11.33 ImgH(mm) 2.93 3.05 2.93 2.93 2.93 2.93 2.93

[0198] Table 16

[0199] This application also provides an imaging device, wherein the electronic photosensitive element can be a photocoupled device (CCD) or a complementary metal oxide semiconductor device (CMOS). The imaging device can be a stand-alone imaging device such as a digital camera, or an imaging module integrated into a mobile electronic device such as a mobile phone. The imaging device is equipped with the optical imaging lens described above.

[0200] Obviously, the embodiments described above are merely some, not all, embodiments of the present invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort should fall within the scope of protection of the present invention.

[0201] It should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the exemplary embodiments according to this application. As used herein, the singular form is intended to include the plural form as well, unless the context clearly indicates otherwise. Furthermore, it should be understood that when the terms "comprising" and / or "including" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof.

[0202] It should be noted that the terms "first," "second," etc., used in the specification, claims, and accompanying drawings of this application are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate so that the embodiments of this application described herein can be implemented in sequences other than those illustrated or described herein.

[0203] The above description is merely a preferred embodiment of the present invention and is not intended to limit the invention. Various modifications and variations can be made to the present invention by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. An optical imaging lens, characterized in that, The optical imaging lens consists of seven lenses, which are arranged sequentially from the object side to the image side of the optical imaging lens: The first lens has negative optical power, the object side of the first lens is convex, and the image side of the first lens is concave. The second lens has negative optical power and its object side is concave. The third lens has positive optical power, the object side of the third lens is convex, and the image side of the third lens is convex. The fourth lens has positive optical power, the object side of the fourth lens is convex, and the image side of the fourth lens is convex. The fifth lens has negative optical power and its object side is concave. The sixth lens has positive optical power and its object side is convex. The seventh lens has a convex object-side surface and a concave image-side surface. The following conditions are met: the axial distance TTL from the object side to the imaging plane of the first lens and the center thickness CT3 of the third lens on the optical axis satisfy: 4.62≤TTL / CT3≤4.96; the radius of curvature R6 of the image side of the third lens, the radius of curvature R5 of the object side of the third lens and the effective focal length f3 of the third lens satisfy: 3.10≤(R5-R6) / f3≤6.29; the axial distance SL from the aperture to the imaging plane, the center thickness CT4 of the fourth lens on the optical axis, the center thickness CT5 of the fifth lens on the optical axis, the center thickness CT6 of the sixth lens on the optical axis and the center thickness CT7 of the seventh lens on the optical axis satisfy: 1.63≤SL / (CT4+CT5+CT6+CT7)≤1.

88.

2. The optical imaging lens according to claim 1, characterized in that, The maximum field of view (FOV) of the optical imaging lens satisfies: 133.8°≤FOV≤138.4°; the effective focal length f1 of the first lens and the effective focal length f2 of the second lens satisfy: 0.31≤f1 / f2≤1.

38.

3. The optical imaging lens according to claim 1, characterized in that, The radius of curvature R1 of the object side of the first lens and the radius of curvature R2 of the image side of the first lens satisfy the following condition: 1.09≤(R1+R2) / (R1-R2)≤1.

32.

4. The optical imaging lens according to claim 1, characterized in that, The radius of curvature R8 of the image side of the fourth lens, the radius of curvature R7 of the object side of the fourth lens, and the effective focal length f4 of the fourth lens satisfy the following condition: 2.07≤(R7-R8) / f4≤2.

12.

5. The optical imaging lens according to claim 1, characterized in that, The effective focal length f5 of the fifth lens, the effective focal length f6 of the sixth lens, and the effective focal length f of the optical imaging lens satisfy the following condition: 0.60≤(f5+f6) / f≤3.

68.

6. The optical imaging lens according to claim 1, characterized in that, The effective half-aperture DT11 of the object side of the first lens and the effective half-aperture DT41 of the object side of the fourth lens satisfy the following condition: 5.59≤DT11 / DT41≤6.

27.

7. The optical imaging lens according to claim 1, characterized in that, The effective half-aperture DT72 of the image side of the seventh lens and the effective half-aperture DT42 of the image side of the fourth lens satisfy the following condition: 2.39≤DT72 / DT42≤2.

65.

8. The optical imaging lens according to claim 1, characterized in that, The combined focal length f23 of the second lens and the third lens, and the edge thickness ET2 of the second lens and the edge thickness ET3 of the third lens satisfy the following condition: 1.38≤f23 / (ET2+ET3)≤1.

60.

9. The optical imaging lens according to claim 1, characterized in that, The center thickness CT1 of the first lens on the optical axis and the edge thickness ET1 of the first lens satisfy the following condition: 1.27≤ET1 / CT1≤1.

79.

10. The optical imaging lens according to claim 1, characterized in that, The edge thickness ET5 of the fifth lens, the edge thickness ET6 of the sixth lens, and the edge thickness ET7 of the seventh lens satisfy the following condition: 1.14≤(ET6+ET7) / ET5≤1.90.

Images