Optical imaging lens

Abstract

The utility model provides an optical imaging lens. The optical imaging lens comprises a lens barrel, seven lenses and a plurality of spacers, the seven lenses comprise a first lens with negative focal power, a second lens with positive focal power, a third lens with positive focal power, a fourth lens with positive focal power, a fifth lens with negative focal power, a sixth lens with positive focal power and a seventh lens with negative focal power; an air gap is formed between two adjacent lenses in the first lens to the seventh lens; the plurality of spacers include a fourth spacer and a fifth spacer; the following conditions are satisfied: 1lt; eP 45 / CT 5lt; 4; the following conditions are satisfied: 1lt; r8 / R9lt; 4; 0 lt; d4s / (f4-f5) lt; and 0.5. According to the utility model, the problem of serious internal reflection stray light existing in an optical imaging lens with seven lenses in the prior art is solved.

Description

Technical Field

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

[0002] With the continuous progress of technology and the increasing demands of consumers, mobile phones have become an indispensable part of people's daily lives. Mobile phones perform multiple functions. In particular, the rapid development of mobile phone camera technology has led to higher and higher performance requirements for the optical imaging lenses on mobile phones. The high performance and high quality of optical imaging lenses have become the focus of competition among major manufacturers. Consumers not only pursue clarity and the authenticity of color reproduction but also hope that the optical imaging lenses can capture a wider field of view and richer details. Currently, there are many designs of optical imaging lenses with seven lenses to meet market demands. However, the optical imaging lenses with seven lenses are prone to internal reflection problems, and the internally reflected light generates stray light, thereby affecting the imaging quality of the optical imaging lenses.

[0003] That is to say, the optical imaging lenses with seven lenses in the prior art have serious problems of internal reflection stray light. Summary of the Utility Model

[0004] The main purpose of the present utility model is to provide an optical imaging lens to solve the problem of serious internal reflection stray light existing in the optical imaging lenses with seven lenses in the prior art.

[0005] To achieve the above object, according to one aspect of the present utility model, there is provided an optical imaging lens, including a lens barrel, seven lenses, and a plurality of spacers. The seven lenses and the plurality of spacers are all disposed in the lens barrel. The seven lenses sequentially include a first lens with a negative optical power, a second lens with a positive optical power, a third lens with a positive optical power, a fourth lens with a positive optical power, a fifth lens with a negative optical power, a sixth lens with a positive optical power, and a seventh lens with a negative optical power from the object side to the image side. There is an air gap between adjacent two of the first lens to the seventh lens; the plurality of spacers at least include a fourth spacer and a fifth spacer. The fourth spacer is located between the fourth lens and the fifth lens and abuts against a part of the image side surface of the fourth lens, and the fifth spacer is located between the fifth lens and the sixth lens and abuts against a part of the image side surface of the fifth lens; the spacing distance EP45 on the optical axis from the image side surface of the fourth spacer to the object side surface of the fifth spacer and the central thickness CT5 of the fifth lens satisfy: 1 < EP45 / CT5 < 4; the radius of curvature R8 of the image side surface of the fourth lens and the radius of curvature R9 of the object side surface of the fifth lens satisfy: 1 < R8 / R9 < 4; the inner diameter d4s of the object side surface of the fourth spacer, the effective focal length f4 of the fourth lens, and the effective focal length f5 of the fifth lens satisfy: 0 < d4s / (f4 - f5) < 0.5.

[0006] According to another aspect of the present utility model, an optical imaging lens is further provided, which includes a lens barrel, seven lenses and a plurality of spacers. The seven lenses and the plurality of spacers are all arranged in the lens barrel. The seven lenses sequentially include a first lens with a negative optical power, a second lens with a positive optical power, a third lens with a positive optical power, a fourth lens with a positive optical power, a fifth lens with a negative optical power, a sixth lens with a positive optical power, and a seventh lens with a negative optical power from the object side to the image side. There is an air gap between two adjacent lenses among the first lens to the seventh lens; the plurality of spacers at least include a fourth spacer and a fifth spacer. The fourth spacer is located between the fourth lens and the fifth lens and is in partial contact with the image side surface of the fourth lens. The fifth spacer is located between the fifth lens and the sixth lens and is in partial contact with the image side surface of the fifth lens; the spacing distance EP45 on the optical axis from the image side surface of the fourth spacer to the object side surface of the fifth spacer and the central thickness CT5 of the fifth lens satisfy: 1 < EP45 / CT5 < 4; the radius of curvature R8 of the image side surface of the fourth lens and the radius of curvature R9 of the object side surface of the fifth lens satisfy: 1 < R8 / R9 < 4; the inner diameter d5s of the object side surface of the fifth spacer, the inner diameter d4m of the image side surface of the fourth spacer, the radius of curvature R9 of the object side surface of the fifth lens and the radius of curvature R10 of the image side surface of the fifth lens satisfy: 0 < d5s / R10 - d4m / R9 < 1.5.

[0007] Further, the plurality of spacers further include a first spacer and a second spacer. The first spacer is located between the first lens and the second lens and is in partial contact with the image side surface of the first lens. The second spacer is located between the second lens and the third lens and is in partial contact with the image side surface of the second lens. The inner diameter d1s of the object side surface of the first spacer, the inner diameter d2s of the object side surface of the second spacer and the effective focal length f2 of the second lens satisfy: 2 < f2 / (d1s - d2s) < 10.

[0008] Further, the plurality of spacers further include a first spacer. The first spacer is located between the first lens and the second lens and is in partial contact with the image side surface of the first lens. The inner diameter d1m of the image side surface of the first spacer, the outer diameter D1m of the image side surface of the first spacer and the distance T12 on the optical axis from the image side surface of the first lens to the object side surface of the second lens satisfy: 2 < (D1m - d1m) / T12 < 6.

[0009] Further, the plurality of spacers further include a second spacer, the second spacer is located between the second lens and the third lens and partially abuts against the image side surface of the second lens, and the inner diameter d2s of the object side surface of the second spacer, the inner diameter d2m of the image side surface of the second spacer, the curvature radius R4 of the image side surface of the second lens, and the curvature radius R5 of the object side surface of the third lens satisfy: -0.5 <d2s / R4-d2m / R5<1。

[0010] Furthermore, the multiple spacers also include a third spacer, which is located between the third lens and the fourth lens and abuts against the image side portion of the third lens, and the inner diameter d3s of the object side of the third spacer, the outer diameter D3m of the image side of the third spacer, the effective focal length f3 of the third lens and the effective focal length f4 of the fourth lens satisfy: -5<(D3m-d3s) / (f4-f3)<15.

[0011] Furthermore, the plurality of spacers further include a second spacer, the second spacer is located between the second lens and the third lens and abuts against the image side surface of the second lens, and the inner diameter d2m of the image side surface of the second spacer, the effective diameter DT31 of the central light-transmitting area of ​​the object side surface of the third lens, and the effective diameter DT22 of the central light-transmitting area of ​​the image side surface of the second lens satisfy the following relationship: -18 <d2m / (DT22-DT31)<8。

[0012] Furthermore, the plurality of spacers also include a first spacer and a second spacer, the first spacer is located between the first lens and the second lens and abuts against the image side portion of the first lens, the second spacer is located between the second lens and the third lens and abuts against the image side portion of the second lens, and an outer diameter D1s of the object side portion of the first spacer, an outer diameter D2s of the object side portion of the second spacer, an effective diameter DT12 of the central light-transmitting area of ​​the image side portion of the first lens, and an effective diameter DT22 of the central light-transmitting area of ​​the image side portion of the second lens satisfy the following: 0<|D2s-D1s| / (DT12-DT22)<0.1.

[0013] Further, the inner diameter d5s of the object side surface of the fifth spacer, the inner diameter d4m of the image side surface of the fourth spacer, the curvature radius R9 of the object side surface of the fifth lens and the curvature radius R10 of the image side surface of the fifth lens satisfy: 0 <d5s / R10-d4m / R9<1.5。

[0014] Furthermore, the plurality of spacers also include a first spacer, a second spacer and a third spacer, the first spacer is located between the first lens and the second lens and abuts against the image side portion of the first lens, the second spacer is located between the second lens and the third lens and abuts against the image side portion of the second lens, the third spacer is located between the third lens and the fourth lens and abuts against the image side portion of the third lens, and among the plurality of spacers, the second spacer has the smallest inner diameter; the inner diameter d1s of the object side portion of the first spacer, the inner diameter d2s of the object side portion of the second spacer and the inner diameter d3s of the object side portion of the third spacer satisfy 0<(d1s-d2s) / (d3s-d2s)<3.

[0015] Furthermore, the inner diameter d5s of the object side surface of the fifth spacer, the inner diameter d5m of the image side surface of the fifth spacer, the effective diameter DT52 of the central light-transmitting area of ​​the image side surface of the fifth lens, and the effective diameter DT61 of the central light-transmitting area of ​​the object side surface of the sixth lens satisfy the following conditions: <d5s / DT52-d5m / DT61<0.5。

[0016] Furthermore, the plurality of spacers further include a sixth spacer, the sixth spacer is located between the sixth lens and the seventh lens and abuts against the image side surface of the sixth lens, and the inner diameter d6s of the object side surface of the sixth spacer, the center thickness CT6 of the sixth lens, and the center thickness CT7 of the seventh lens satisfy the following conditions: 2 <d6s / (CT6+CT7)<5。

[0017] Further, the plurality of spacers further include a first spacer and a sixth spacer, the first spacer is located between the first lens and the second lens and abuts against the image side surface of the first lens, the sixth spacer is located between the sixth lens and the seventh lens and abuts against the image side surface of the sixth lens, and an outer diameter D1s of the object side surface of the first spacer, an outer diameter D6m of the image side surface of the sixth spacer, an effective diameter DT11 of the central light-transmitting area of ​​the object side surface of the first lens, and an effective diameter DT72 of the central light-transmitting area of ​​the image side surface of the seventh lens satisfy the following conditions: 1.7 <D1s / D6m+DT11 / DT72<2.1。

[0018] Applying the technical solution of the present utility model, the optical imaging lens includes a lens barrel, seven lenses and a plurality of spacers. The seven lenses and the plurality of spacers are all arranged in the lens barrel. The seven lenses sequentially include a first lens with negative optical power, a second lens with positive optical power, a third lens with positive optical power, a fourth lens with positive optical power, a fifth lens with negative optical power, a sixth lens with positive optical power, and a seventh lens with negative optical power from the object side to the image side. There is an air gap between two adjacent lenses among the first lens to the seventh lens; the plurality of spacers at least include a fourth spacer and a fifth spacer. The fourth spacer is located between the fourth lens and the fifth lens and abuts against a part of the image side surface of the fourth lens, and the fifth spacer is located between the fifth lens and the sixth lens and abuts against a part of the image side surface of the fifth lens; the spacing distance EP45 on the optical axis from the image side surface of the fourth spacer to the object side surface of the fifth spacer and the central thickness CT5 of the fifth lens satisfy: 1 < EP45 / CT5 < 4; the radius of curvature R8 of the image side surface of the fourth lens and the radius of curvature R9 of the object side surface of the fifth lens satisfy: 1 < R8 / R9 < 4; the inner diameter d4s of the object side surface of the fourth spacer, the effective focal length f4 of the fourth lens, and the effective focal length f5 of the fifth lens satisfy: 0 < d4s / (f4 - f5) < 0.5.

[0019] The optical imaging lens of the present application is composed of a lens barrel and seven lenses and a plurality of spacers arranged in the lens barrel. By reasonably arranging the seven lenses and the plurality of spacers, and setting a fourth lens with positive optical power and a fifth lens with negative optical power, and when the optical imaging lens satisfies 1 < EP45 / CT5 < 4 and 1 < R8 / R9 < 4, it can effectively control the refraction direction of light when passing through the fourth lens and the fifth lens, so as to ensure the image height at each position of the field of view, and further ensure the final imaging quality. However, at the same time, as Fig.24 shown, it is a schematic diagram of the internal reflection optical path of the optical imaging lens of the prior art. It can be seen from the figure that the light incident from the object side is prone to internal reflection at the effective radius edge of the image side surface of the fifth lens, so that the light is reflected multiple times in the edge structure of the fifth lens and then exits after reaching the edge of the effective radius of the object side surface of the fifth lens, forming stray light and affecting the imaging quality. Therefore, in the present application, by setting the fourth spacer and restricting 0 < d4s / (f4 - f5) < 0.5, by controlling the inner diameter of the object side surface of the fourth spacer, the effective focal length of the fourth lens, and the effective focal length of the fifth lens, it is beneficial to ensure that the fourth spacer can effectively block the stray light generated in the fifth lens, thereby improving the stray light and the imaging quality. Description of the Drawings

[0020] The specification drawings forming a part of the present application are used to provide a further understanding of the present utility model. The schematic embodiments of the present utility model and their descriptions are used to explain the present utility model and do not constitute an improper limitation to the present utility model. In the drawings:

[0021] Figure 1 A dimension diagram of an optical imaging lens according to an optional embodiment of the utility model is shown;

[0022] Figure 2 A schematic structural diagram of an optical imaging lens according to Embodiment 1-1 of the present utility model is shown;

[0023] Figure 3 A schematic structural diagram of an optical imaging lens according to Embodiment 1-2 of the present utility model is shown;

[0024] Figure 4 The structure diagram of the optical imaging lens of Embodiments 1-3 of the present utility model is shown;

[0025] Figures 5 to 7 The axial chromatic aberration curve, the astigmatism curve and the distortion curve of the optical imaging lens of the first embodiment of the utility model are respectively shown;

[0026] Figure 8 A schematic structural diagram of an optical imaging lens according to Embodiment 2-1 of the present utility model is shown;

[0027] Fig. 9 A schematic structural diagram of an optical imaging lens according to Embodiment 2-2 of the present utility model is shown;

[0028] Fig.10 A schematic structural diagram of an optical imaging lens according to Embodiment 2-3 of the present utility model is shown;

[0029] Figures 11 to 13 The axial chromatic aberration curve, astigmatism curve and distortion curve of the optical imaging lens of the second embodiment of the utility model are respectively shown;

[0030] Fig.14 A schematic structural diagram of an optical imaging lens according to Embodiment 3-1 of the present utility model is shown;

[0031] Fig.15 A schematic structural diagram of an optical imaging lens according to Embodiment 3-2 of the present utility model is shown;

[0032] Fig.16 A schematic structural diagram of an optical imaging lens according to Embodiment 3-3 of the present utility model is shown;

[0033] Figures 17 to 19 The axial chromatic aberration curve, astigmatism curve and distortion curve of the optical imaging lens of the third embodiment of the utility model are respectively shown;

[0034] Fig. 20The stray light diagram is shown when the optical imaging lens of the present invention satisfies EP45 / CT5=1.9, R8 / R9=1.9, and d4s / (f4-f5)=0.8;

[0035] Fig.21 The stray light diagram is shown when the optical imaging lens of the present invention satisfies EP45 / CT5=1.9, R8 / R9=1.9, and d4s / (f4-f5)=0.36;

[0036] Fig. 22 The stray light diagram is shown when the optical imaging lens of the utility model satisfies EP45 / CT5=2.7, R8 / R9=2.0, and d4s / (f4-f5)=0.8;

[0037] Fig.23 The stray light diagram is shown when the optical imaging lens of the utility model satisfies EP45 / CT5=2.7, R8 / R9=2.0, and d4s / (f4-f5)=-0.5;

[0038] Fig.24 A schematic diagram of the internal reflection light path of an optical imaging lens in the prior art is shown.

[0039] The above drawings include the following reference numerals:

[0040] P0, lens barrel; 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; P1, first spacer; P2, second spacer; P3, third spacer; P4, fourth spacer; P5, fifth spacer; P6, sixth spacer. DETAILED DESCRIPTION

[0041] 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 utility model will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0042] 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.

[0043] 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.

[0044] 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.

[0045] 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.

[0046] In this article, the paraxial area refers to the area near the optical axis. If the lens surface is convex and the position of the convex surface is not defined, it means that the lens surface is convex at least in the paraxial area; 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 area. The judgment of the surface shape in the paraxial area can be based on the judgment method of ordinary knowledgeable people in this field, and the positive and negative R value (R refers to the radius of curvature of the paraxial area, usually refers to the R value on the lens database (lens data) in the optical software) is used to judge the convexity and concavity. For the light incident side, when the R value is positive, it is judged as a convex surface, and when the R value is negative, it is judged as a concave surface; for the light exiting side, when the R value is positive, it is judged as a concave surface, and when the R value is negative, it is judged as a convex surface.

[0047] In order to solve the problem of serious internal reflection stray light in the optical imaging lens with seven lenses in the prior art, the utility model provides an optical imaging lens.

[0048] like Figures 1 to 23As shown, in an alternative embodiment of the present application, the optical imaging lens includes a lens barrel, seven lenses, and multiple spacers. The seven lenses and the multiple spacers are all disposed in the lens barrel. The seven lenses sequentially include a first lens with a negative optical power, a second lens with a positive optical power, a third lens with a positive optical power, a fourth lens with a positive optical power, a fifth lens with a negative optical power, a sixth lens with a positive optical power, and a seventh lens with a negative optical power from the object side to the image side. There is an air gap between adjacent two of the first lens to the seventh lens; the multiple spacers at least include a fourth spacer and a fifth spacer. The fourth spacer is located between the fourth lens and the fifth lens and abuts against a part of the image side surface of the fourth lens, and the fifth spacer is located between the fifth lens and the sixth lens and abuts against a part of the image side surface of the fifth lens; the spacing distance EP45 on the optical axis from the image side surface of the fourth spacer to the object side surface of the fifth spacer and the central thickness CT5 of the fifth lens satisfy: 1 < EP45 / CT5 < 4; the radius of curvature R8 of the image side surface of the fourth lens and the radius of curvature R9 of the object side surface of the fifth lens satisfy: 1 < R8 / R9 < 4; the inner diameter d4s of the object side surface of the fourth spacer, the effective focal length f4 of the fourth lens, and the effective focal length f5 of the fifth lens satisfy: 0 < d4s / (f4 - f5) < 0.5.

[0049] The optical imaging lens of the present application is composed of a lens barrel and seven lenses and multiple spacers disposed in the lens barrel. By reasonably arranging the seven lenses and the multiple spacers, and setting a fourth lens with a positive optical power and a fifth lens with a negative optical power, and when the optical imaging lens satisfies 1 < EP45 / CT5 < 4 and 1 < R8 / R9 < 4, it is possible to effectively control the refraction direction of light when passing through the fourth lens and the fifth lens, thereby ensuring the image height at each position of the field of view, and further ensuring the final imaging quality. However, at the same time, as Fig.24 shown, it is a schematic diagram of the internal reflection optical path of an optical imaging lens of the prior art. It can be seen from the figure that the light incident from the object side is prone to internal reflection at the effective radius edge of the image side surface of the fifth lens, so that the light reaches the edge of the effective radius of the object side surface of the fifth lens after multiple reflections in the edge structure of the fifth lens and then exits, forming stray light, which affects the imaging quality. Therefore, in the present application, by setting the fourth spacer and restricting 0 < d4s / (f4 - f5) < 0.5, by controlling the inner diameter of the object side surface of the fourth spacer, the effective focal length of the fourth lens, and the effective focal length of the fifth lens, it is beneficial to ensure that the fourth spacer can effectively block the stray light generated in the fifth lens, thereby improving the stray light and enhancing the imaging quality.

[0050] In addition, by changing the relationship between the inner diameter of the object side surface of the fourth spacer, the effective focal length of the fourth lens, and the effective focal length of the fifth lens, optical simulation is carried out, wherein, Fig. 20The stray light diagram is shown when the optical imaging lens satisfies EP45 / CT5 = 1.9, R8 / R9 = 1.9, and d4s / (f4 - f5) = 0.8. Fig.21 The stray light diagram is shown when the optical imaging lens satisfies EP45 / CT5 = 1.9, R8 / R9 = 1.9, and d4s / (f4 - f5) = 0.36. Fig. 22 The stray light diagram is shown when the optical imaging lens satisfies EP45 / CT5 = 2.7, R8 / R9 = 2.0, and d4s / (f4 - f5) = 0.8. Fig.23 The stray light diagram is shown when the optical imaging lens satisfies EP45 / CT5 = 2.7, R8 / R9 = 2.0, and d4s / (f4 - f5) = 0. - 0.5. From Fig. 20 and Fig. 22 it can be seen that the stray light spots in the figure are relatively obvious, indicating that the stray light energy is relatively high. By comparison, Fig.21 compared with Fig. 20 the stray light spots are significantly reduced, Fig.23 compared with Fig. 22 the stray light spots are significantly reduced. Therefore, by restricting 1 < EP45 / CT5 < 4, 1 < R8 / R9 < 4, and 0 < d4s / (f4 - f5) < 0.5 in this application, the stray light generated by the fifth lens can be effectively reduced, achieving the purpose of improving the stray light.

[0051] In this embodiment, the plurality of spacers further includes a first spacer and a second spacer. The first spacer is located between the first lens and the second lens and abuts against a part of the image side surface of the first lens. The second spacer is located between the second lens and the third lens and abuts against a part of the image side surface of the second lens. The inner diameter d1s of the object side surface of the first spacer, the inner diameter d2s of the object side surface of the second spacer, and the effective focal length f2 of the second lens satisfy: 2 < f2 / (d1s - d2s) < 10. Constraining this conditional expression can not only distinguish the appearance differences of the optical imaging lens, but also ensure that each spacer is sequentially assembled with the lens barrel and each lens, ensuring the assembly stability. And by setting the first spacer and the second spacer, the stray light reflected from the image side surface of the first lens can be effectively intercepted from entering the second lens, reducing the generation of ghost images, and thus improving the imaging quality of the optical imaging lens.

[0052] In this embodiment, the inner diameter d1m of the image side surface of the first spacer, the outer diameter D1m of the image side surface of the first spacer, and the distance T12 on the optical axis from the image side surface of the first lens to the object side surface of the second lens satisfy: 2 < (D1m - d1m) / T12 < 6. By constraining the inner diameter of the image side surface of the first spacer, the outer diameter of the image side surface of the first spacer, and the distance on the optical axis from the image side surface of the first lens to the object side surface of the second lens, the position of the light passing through the second lens can be effectively controlled, thereby reducing the stray light generated by the reflection of the second lens. At the same time, the path accuracy of the light passing through the second lens can be effectively ensured, thereby controlling the image height of each field of view to the required design position and ensuring the imaging quality.

[0053] In this embodiment, the inner diameter d2s of the object side surface of the second spacer, the inner diameter d2m of the image side surface of the second spacer, the radius of curvature R4 of the image side surface of the second lens, and the radius of curvature R5 of the object side surface of the third lens satisfy: -0.5 < d2s / R4 - d2m / R5 < 1. By constraining the radii of curvature of the second lens and the third lens, it is helpful to constrain the surface shapes of the second lens and the third lens, so that the light is transmitted along the established optical path, which is beneficial to ensuring the position accuracy of the light passing through the second lens and the third lens. At the same time, by controlling the inner diameter of the object side surface of the second spacer and the inner diameter of the image side surface of the second spacer, it is helpful to constrain the outer diameter of the second lens, thereby effectively controlling the size of the second lens to reduce the weight, and further reducing the total weight of the optical imaging lens to achieve lightweight. Moreover, controlling the inner diameter of the image side surface of the second spacer can reduce the stray light entering the third lens, thereby improving the imaging quality.

[0054] In this embodiment, the plurality of spacers further includes a third spacer. The third spacer is located between the third lens and the fourth lens and is partially in contact with the image side surface of the third lens. The inner diameter d3s of the object side surface of the third spacer, the outer diameter D3m of the image side surface of the third spacer, the effective focal length f3 of the third lens, and the effective focal length f4 of the fourth lens satisfy: -5 < (D3m - d3s) / (f4 - f3) < 15. By constraining this conditional expression, the outer diameter of the third lens can be controlled, and at the same time, the inner diameter of the second spacer can be controlled to reduce the stray light entering the third lens. Constraining the effective focal length of the third lens and the effective focal length of the fourth lens is beneficial to controlling the overall length of the lens group near the object side end of the optical imaging lens, thereby controlling the overall length of the optical imaging lens and being beneficial to achieving miniaturization.

[0055] In this embodiment, the following condition is satisfied among the inner diameter d2m of the image side surface of the second spacer, the effective diameter DT31 of the central light-transmitting region of the object side surface of the third lens, and the effective diameter DT22 of the central light-transmitting region of the image side surface of the second lens: -18 < d2m / (DT22 - DT31) < 8. By restricting the effective diameter of the central light-transmitting region of the image side surface of the second lens and the effective diameter of the central light-transmitting region of the object side surface of the third lens, it helps to control the transmission of light in the rear lens group of the optical imaging lens along the established optical path, so as to control the image height of each field of view to the required position. At the same time, it indirectly controls the effective diameter sizes of the second lens and the third lens, which is beneficial to ensuring the shape uniformity of each lens, thereby improving the formability and structural stability of the lens.

[0056] In this embodiment, the following condition is satisfied among the outer diameter D1s of the object side surface of the first spacer, the outer diameter D2s of the object side surface of the second spacer, the effective diameter DT12 of the central light-transmitting region of the image side surface of the first lens, and the effective diameter DT22 of the central light-transmitting region of the image side surface of the second lens: 0 < |D2s - D1s| / (DT12 - DT22) < 0.1. Restricting this conditional formula helps to control the effective diameter segment difference and the outer diameter size of the first lens and the second lens, ensure the structural rationality of the first lens and the second lens, and further improve the overall formability and assembly stability of the lens, enhance the qualified rate of the optical imaging lens during the production process, and at the same time help to control the overall size of the lens barrel and improve the shape adaptability.

[0057] In this embodiment, the following condition is satisfied among the inner diameter d5s of the object side surface of the fifth spacer, the inner diameter d4m of the image side surface of the fourth spacer, the curvature radius R9 of the object side surface of the fifth lens, and the curvature radius R10 of the image side surface of the fifth lens: 0 < d5s / R10 - d4m / R9 < 1.5. By restricting the curvature radius of the object side surface of the fifth lens and the curvature radius of the image side surface of the fifth lens, it can restrict the curvature of the two side surfaces of the fifth lens, thereby effectively controlling the reasonable distribution of the optical power of the fifth lens, and further ensuring the path accuracy of the light passing through the fifth lens, so as to improve the imaging quality of the optical imaging lens, increase the performance upper limit of the optical imaging lens, and at the same time control the inner diameter sizes of the fourth spacer and the fifth spacer to ensure that the fourth spacer and the fifth spacer can effectively intercept the stray light reflected to them, and at the same time avoid the stray light generated due to the reflection of the spacer.

[0058] In this embodiment, among the multiple spacers, specifically, among the first spacer to the sixth spacer, the inner diameter of the second spacer is the smallest; and it satisfies that 0 < (d1s - d2s) / (d3s - d2s) < 3 among the inner diameter d1s of the object side surface of the first spacer, the inner diameter d2s of the object side surface of the second spacer, and the inner diameter d3s of the object side surface of the third spacer. Such a setting helps to control the sizes of the first spacer, the second spacer, and the third spacer, ensures that the inner diameter of the second spacer is the smallest, and thus ensures the difference in the appearance of the spacers. Since the effective diameter differences of the first lens, the second lens, and the third lens of the optical imaging lens of the present application are relatively large, restricting this conditional formula can also ensure the accuracy of the light path transition of the light passing through the first lens to the third lens, reduce the effective diameter size differences of the first lens, the second lens, and the third lens, and ensure the assembly stability of the optical imaging lens.

[0059] In this embodiment, it satisfies that 0 < d5s / DT52 - d5m / DT61 < 0.5 among the inner diameter d5s of the object side surface of the fifth spacer, the inner diameter d5m of the image side surface of the fifth spacer, the effective diameter DT52 of the central light-transmitting region of the image side surface of the fifth lens, and the effective diameter DT61 of the central light-transmitting region of the object side surface of the sixth lens. Restricting this conditional formula can control the light height and light passing amount when the light passes through the fifth lens and the sixth lens, reduce the effective diameter difference between the fifth lens and the sixth lens, and reasonably control the height difference between the light passing through the fifth lens and the sixth lens, thereby effectively improving the stray light generated by the sixth lens. At the same time, it can improve the assembly stability of the fifth lens and the sixth lens, and further ensure the structural stability of the overall optical imaging lens.

[0060] In this embodiment, the multiple spacers further include a sixth spacer. The sixth spacer is located between the sixth lens and the seventh lens and is partially in contact with the image side surface of the sixth lens; it satisfies that 2 < d6s / (CT6 + CT7) < 5 among the inner diameter d6s of the object side surface of the sixth spacer, the central thickness CT6 of the sixth lens, and the central thickness CT7 of the seventh lens. By controlling the central thicknesses of the sixth lens and the seventh lens within a reasonable range, the structural strengths of the sixth lens and the seventh lens can be ensured, which is beneficial to the molding of the lenses. At the same time, by controlling the inner diameter of the sixth spacer, the stray light generated by the reflection of the inner diameter surface of the sixth spacer can be effectively avoided, and the position of the light passing through the seventh lens can also be effectively controlled. Finally, the possibility of the seventh lens generating stray light is reduced, and the path accuracy of the imaging light when passing through the last lens is ensured, and the imaging stability is ensured.

[0061] In this embodiment, the following conditions are satisfied among the outer diameter D1s of the object side surface of the first spacer, the outer diameter D6m of the image side surface of the sixth spacer, the effective diameter DT11 of the central light-transmitting region of the object side surface of the first lens, and the effective diameter DT72 of the central light-transmitting region of the image side surface of the seventh lens: 1.7 < D1s / D6m + DT11 / DT72 < 2.1. By constraining this conditional expression, the effective diameter step difference and the outer diameter step difference between the first lens and the seventh lens can be controlled. Since the effective diameter of the central light-transmitting region of the object side surface of the first lens and the effective diameter of the central light-transmitting region of the image side surface of the seventh lens of the optical imaging lens of the present application are the largest, controlling the step difference between the two helps to control the overall structural step difference of the optical imaging lens, thereby ensuring the assembly stability of the optical imaging lens. At the same time, the outer diameter dimensions at both ends of the lens barrel are controlled to ensure that the aperture difference at both ends is not too large, so as to ensure that the volume of the optical imaging lens is within a suitable range and avoid the instability problem caused by the too large size difference between the front end and the rear end of the optical imaging lens.

[0062] As Figures 1 to 23 shown, in another alternative embodiment of the present application, the optical imaging lens includes a lens barrel, seven lenses, and multiple spacers. The seven lenses and the multiple spacers are all arranged in the lens barrel. The seven lenses sequentially include a first lens with negative optical power, a second lens with positive optical power, a third lens with positive optical power, a fourth lens with positive optical power, a fifth lens with negative optical power, a sixth lens with positive optical power, and a seventh lens with negative optical power from the object side to the image side. There is an air gap between two adjacent lenses among the first lens to the seventh lens; the multiple spacers at least include a fourth spacer and a fifth spacer. The fourth spacer is located between the fourth lens and the fifth lens and partially abuts against the image side surface of the fourth lens, and the fifth spacer is located between the fifth lens and the sixth lens and partially abuts against the image side surface of the fifth lens; the following conditions are satisfied between the interval distance EP45 on the optical axis from the image side surface of the fourth spacer to the object side surface of the fifth spacer and the central thickness CT5 of the fifth lens: 1 < EP45 / CT5 < 4; the following conditions are satisfied between the curvature radius R8 of the image side surface of the fourth lens and the curvature radius R9 of the object side surface of the fifth lens: 1 < R8 / R9 < 4; the following conditions are satisfied among the inner diameter d5s of the object side surface of the fifth spacer, the inner diameter d4m of the image side surface of the fourth spacer, the curvature radius R9 of the object side surface of the fifth lens, and the curvature radius R10 of the image side surface of the fifth lens: 0 < d5s / R10 - d4m / R9 < 1.5.

[0063] The optical imaging lens of the present application is composed of a lens barrel and seven lenses and multiple spacers arranged in the lens barrel. By reasonably arranging the seven lenses and multiple spacers, and setting a fourth lens with a positive optical power and a fifth lens with a negative optical power, and when the optical imaging lens satisfies 1 < EP45 / CT5 < 4 and 1 < R8 / R9 < 4, it is possible to effectively control the refraction direction of light when passing through the fourth lens and the fifth lens, thereby ensuring the image height at each position of the field of view, and further ensuring the final imaging quality. However, at the same time, light is likely to generate internal reflection within the fifth lens, thereby generating stray light and affecting the imaging quality. Therefore, in the present application, by restricting 0 < d5s / R10 - d4m / R9 < 1.5, it is possible to restrict the curvature of the two side surfaces of the fifth lens, thereby effectively controlling the reasonable distribution of the optical power of the fifth lens, and further ensuring the path accuracy of light passing through the fifth lens, thereby improving the imaging quality of the optical imaging lens, increasing the performance upper limit of the optical imaging lens, and at the same time controlling the inner diameter sizes of the fourth spacer and the fifth spacer to ensure that the fourth spacer and the fifth spacer can effectively intercept the stray light reflected to them, and at the same time avoid the stray light generated due to the reflection of the spacer.

[0064] Optionally, the above optical imaging lens may further include a protective glass for protecting the photosensitive element located on the imaging surface.

[0065] In the optical imaging lens of the present application, multiple lenses can be used, such as the seven lenses mentioned above. In the present 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 using an aspherical lens, it is possible to eliminate the aberration that appears during imaging as much as possible, thereby improving the imaging quality.

[0066] Optionally, the above optical imaging lens may further include a diaphragm (not shown in the figure), and the diaphragm is located between the second lens and the third lens.

[0067] 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 eight lenses are described as an example in the embodiment, the optical imaging lens is not limited to including eight lenses. If necessary, the optical imaging lens may further include other numbers of lenses.

[0068] Figure 1 The structural schematic diagram of an optical imaging lens of the present application is shown, where Figure 1Parameters such as EP45, D3m, d3s, D2s, d2m, d2s, D1m, D1s, d1m, d1s, d4s, d4m, d5s, d5m, d6s, and D6m are indicated in the figure to clearly and intuitively understand the meaning of the parameters. In order to facilitate the optical imaging lens and the specific surface shape, these parameters will no longer be reflected in the drawings when describing the specific embodiments later.

[0069] 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.

[0070] It should be noted that there are three sub-embodiments in the same embodiment described below, and the parameters such as the curvature radius, center thickness, and the spacing distances between lenses and the coefficients of higher-order terms of the optical imaging lenses in the multiple sub-embodiments of the same embodiment are the same, but the parameters such as the thickness, inner diameter, and outer diameter of the lens barrel, the first to sixth spacers, and the shapes of the lenses are different. In other words, the main structures for imaging are the same, but the auxiliary structures for imaging are different.

[0071] It should be noted that any one of the following embodiments 1 to 3 is applicable to all embodiments of the present application.

[0072] Of course, this embodiment may also include other parameter formulas in the above embodiment, which will not be described one by one here.

[0073] Embodiment 1

[0074] like Figures 2 to 7 As shown, the optical imaging lens of the first embodiment is described. Figure 2 FIG. 1 is a schematic diagram showing the structure of the optical imaging lens of Embodiment 1 under Embodiment 1-1, Figure 3 FIG. 1 is a schematic diagram showing the structure of the optical imaging lens of Embodiment 1 under Embodiment 1-2, Figure 4 The structure diagram of the optical imaging lens of the first embodiment under the embodiments 1-3 is shown.

[0075] like Figures 2 to 4 As shown, the optical imaging lens includes a lens barrel P0 and arranged in sequence from the object side to the image side along the optical axis of the lens barrel P0 in the lens barrel P0: a first lens E1, a first spacer P1, a second lens E2, a second spacer P2, a third lens E3, a third spacer P3, a fourth lens E4, a fourth spacer P4, a fifth lens E5, a fifth spacer P5, a sixth lens E6, a sixth spacer P6, and a seventh lens E7.

[0076] like Figure 2As shown, in the optical imaging lens in Example 1-1, the object side surface and image side surface of the first spacer P1 are respectively in contact with the image side surface S2 of the first lens and the object side surface S3 of the second lens. The object side surface and image side surface of the second spacer P2 are respectively in contact with the image side surface S4 of the second lens and the object side surface S5 of the third lens. The object side surface and image side surface of the third spacer P3 are respectively in contact with the image side surface S6 of the third lens and the object side surface S7 of the fourth lens. The object side surface and image side surface of the fourth spacer P4 are respectively in contact with the image side surface S8 of the fourth lens and the object side surface S9 of the fifth lens. The object side surface and image side surface of the fifth spacer P5 are respectively in contact with the image side surface S10 of the fifth lens and the object side surface S11 of the sixth lens. The object side surface and image side surface of the sixth spacer P6 are respectively in contact with the image side surface S12 of the sixth lens and the object side surface S13 of the seventh lens.

[0077] like Figure 3 As shown, in the optical imaging lens in Example 1-2, the supporting and abutting manner of each spacer is the same as that in Example 1-1, and reference may be made to the relevant description in Example 1-1, which will not be repeated here.

[0078] like Figure 4 As shown, in the optical imaging lens in Example 1-3, the supporting and abutting manner of each spacer is the same as that in Example 1-1, and reference may be made to the relevant description in Example 1-1, which will not be repeated here.

[0079] In summary, the structural parameters of the optical imaging lens of Example 1 in Example 1-1, Example 1-2 and Example 1-3 refer to

[0080] As shown in Table 1. (Unit: mm)

[0081]

[0082]

[0083] Table 1

[0084] In Embodiment 1, the object side surface S1 of the first lens is a concave surface, and the image side surface S2 of the first lens is a concave surface. The object side surface S3 of the second lens is a convex surface, and the image side surface S4 of the second lens is a concave surface. The object side surface S5 of the third lens is a convex surface, and the image side surface S6 of the third lens is a convex surface. The object side surface S7 of the fourth lens is a convex surface, and the image side surface S8 of the fourth lens is a convex surface. The object side surface S9 of the fifth lens is a concave surface, and the image side surface S10 of the fifth lens is a convex surface. The object side surface S11 of the sixth lens is a convex surface, and the image side surface S12 of the sixth lens is a convex surface. The object side surface S13 of the seventh lens is a convex surface, and the image side surface S14 of the seventh lens is a concave surface.

[0085] In Embodiment 1, the effective focal length f of the optical imaging lens is 2.33 mm, the effective focal length f1 of the first lens is -3.87 mm, the effective focal length f2 of the second lens is 9.99 mm, the effective focal length f3 of the third lens is 4.69 mm, the effective focal length f4 of the fourth lens is 5.27 mm, the effective focal length f5 of the fifth lens is -5.17 mm, the effective focal length f6 of the sixth lens is 3.37 mm, the effective focal length of the seventh lens is -5.76 mm, half of the maximum field of view Semi-FOV of the optical imaging lens is 61.85°, and the entrance pupil diameter EPD of the optical imaging lens is 1.26 mm.

[0086] Table 2 shows the basic structural parameters of the optical imaging lens of Example 1, wherein the units of the radius of curvature and thickness / distance are all millimeters.

[0087]

[0088]

[0089] Table 2

[0090] In the first embodiment, the object side surface and the image side surface of the first lens to the seventh lens are all aspherical surfaces, and the surface shape of each aspherical lens can be defined by but not limited to the following aspherical surface formula:

[0091]

[0092] Wherein, x is the distance vector height from the vertex of the aspheric surface when the aspheric surface is at a height of h along the optical axis; c is the paraxial curvature of the aspheric surface, c=1 / R, that is, the paraxial curvature c is the reciprocal of the curvature radius R in Table 2 above; k is the cone coefficient; Ai is the correction coefficient of the i-th order of the aspheric surface. Table 3 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.

[0093]

[0094]

[0095] Table 3

[0096] Figure 5 The axial chromatic aberration curve of the optical imaging lens of the first embodiment is shown, which indicates the deviation of the focal point of light of different wavelengths after passing through the optical imaging lens. Figure 6 The astigmatism curve of the optical imaging lens of the first embodiment is shown, which represents the meridional image curvature and the sagittal image curvature. Figure 7The distortion curve of the optical imaging lens of the first embodiment is shown, which indicates the distortion magnitude values ​​corresponding to different field angles.

[0097] according to Figures 5 to 7 It can be seen that the optical imaging lens provided in the first embodiment can achieve good imaging quality.

[0098] Embodiment 2

[0099] like Figures 8 to 13 As shown, the optical imaging lens of the second embodiment is described. Figure 8 FIG. 2 shows a schematic diagram of the structure of the optical imaging lens of Embodiment 2 under Embodiment 2-1. Fig. 9 FIG. 2 shows a schematic structural diagram of the optical imaging lens of the second embodiment under the embodiment 2-2. Fig.10 A schematic structural diagram of the optical imaging lens of the second embodiment under embodiment 2-3 is shown.

[0100] like Figures 8 to 10 As shown, the optical imaging lens includes a lens barrel P0 and arranged in sequence from the object side to the image side along the optical axis of the lens barrel P0 in the lens barrel P0: a first lens E1, a first spacer P1, a second lens E2, a second spacer P2, a third lens E3, a third spacer P3, a fourth lens E4, a fourth spacer P4, a fifth lens E5, a fifth spacer P5, a sixth lens E6, a sixth spacer P6, and a seventh lens E7.

[0101] like Figure 8 As shown, in the optical imaging lens in Example 2-1, the object side surface and image side surface of the first spacer P1 are respectively in contact with the image side surface S2 of the first lens and the object side surface S3 of the second lens. The object side surface and image side surface of the second spacer P2 are respectively in contact with the image side surface S4 of the second lens and the object side surface S5 of the third lens. The object side surface and image side surface of the third spacer P3 are respectively in contact with the image side surface S6 of the third lens and the object side surface S7 of the fourth lens. The object side surface and image side surface of the fourth spacer P4 are respectively in contact with the image side surface S8 of the fourth lens and the object side surface S9 of the fifth lens. The object side surface and image side surface of the fifth spacer P5 are respectively in contact with the image side surface S10 of the fifth lens and the object side surface S11 of the sixth lens. The object side surface and image side surface of the sixth spacer P6 are respectively in contact with the image side surface S12 of the sixth lens and the object side surface S13 of the seventh lens.

[0102] like Fig. 9 As shown, in the optical imaging lens in Example 2-2, the supporting and abutting manner of each spacer is the same as that in Example 2-1. Please refer to the relevant description in Example 2-1 and will not be repeated here.

[0103] like Fig.10As shown, in the optical imaging lens in Example 2-3, the supporting and abutting manner of each spacer is the same as that in Example 2-1. Please refer to the relevant description in Example 2-1 and will not be repeated here.

[0104] In summary, the structural parameters of the optical imaging lens of Example 2 in Example 2-1, Example 2-2 and Example 2-3 refer to

[0105] As shown in Table 4. (Unit: mm)

[0106]

[0107]

[0108] Table 4

[0109] In the second embodiment, the object side surface S1 of the first lens is a concave surface, and the image side surface S2 of the first lens is a concave surface. The object side surface S3 of the second lens is a convex surface, and the image side surface S4 of the second lens is a concave surface. The object side surface S5 of the third lens is a convex surface, and the image side surface S6 of the third lens is a convex surface. The object side surface S7 of the fourth lens is a convex surface, and the image side surface S8 of the fourth lens is a convex surface. The object side surface S9 of the fifth lens is a concave surface, and the image side surface S10 of the fifth lens is a convex surface. The object side surface S11 of the sixth lens is a convex surface, and the image side surface S12 of the sixth lens is a convex surface. The object side surface S13 of the seventh lens is a convex surface, and the image side surface S14 of the seventh lens is a concave surface.

[0110] In Example 2, the effective focal length f of the optical imaging lens is 2.33 mm, the effective focal length f1 of the first lens is -4.27 mm, the effective focal length f2 of the second lens is 10.97 mm, the effective focal length f3 of the third lens is 4.30 mm, the effective focal length f4 of the fourth lens is 6.05 mm, the effective focal length f5 of the fifth lens is -4.30 mm, the effective focal length f6 of the sixth lens is 3.46 mm, the effective focal length of the seventh lens is -7.81 mm, half of the maximum field of view Semi-FOV of the optical imaging lens is 61.83°, and the entrance pupil diameter EPD of the optical imaging lens is 1.26 mm.

[0111] Table 5 shows a basic structural parameter table of the optical imaging lens of Example 2, wherein the units of the radius of curvature and thickness / distance are all millimeters.

[0112]

[0113]

[0114] Table 5

[0115] Table 6 below gives the higher-order coefficients A4, A6, A8, A10, A12, A14, A16, A18, A20, A22, A24, A26, A28 and A30 that can be used for each aspherical mirror surface S1-S14 in Example 2.

[0116] Face number A4 A6 A8 A10 A12 A14 A16 S1 3.6719E+00 -3.9398E-01 2.5009E-01 -2.6750E-02 4.7635E-02 1.7638E-03 1.3044E-02 S2 1.0974E+00 -1.5020E-01 6.5656E-03 -1.7923E-02 -3.0898E-03 -8.7509E-04 1.5866E-03 S3 2.5175E-03 -4.0018E-02 -1.4500E-03 1.3114E-03 -1.4191E-04 -3.0513E-04 -7.5429E-06 S4 5.5331E-02 -1.6594E-03 1.0628E-03 8.5652E-04 1.6498E-04 -1.7816E-05 -2.0640E-05 S5 3.2827E-02 -9.2536E-04 -6.9085E-04 -1.8696E-04 1.5985E-05 4.7090E-05 1.6346E-05 S6 -1.3706E-01 1.6250E-02 -3.4758E-03 -9.1129E-04 -2.1922E-04 4.2633E-05 8.7131E-05 S7 -2.4964E-01 4.8163E-03 1.4834E-03 -1.4117E-03 5.2483E-04 4.6339E-04 1.2556E-04 S8 -3.4023E-01 -1.8598E-02 1.4344E-02 -3.3266E-04 2.4474E-03 1.5142E-03 2.2645E-05 S9 -2.5033E-01 -1.1038E-02 -3.5992E-03 -6.6567E-04 3.4837E-03 7.2346E-04 -6.5116E-05 S10 6.2662E-02 2.5992E-02 -1.0840E-03 -4.7407E-03 5.0148E-03 -2.3718E-03 1.0236E-03 S11 -5.5608E-01 4.9421E-02 2.2779E-02 -2.4072E-02 2.6036E-03 -6.2883E-04 1.9946E-03 S12 1.5550E-01 -2.5002E-02 6.3524E-02 -3.4166E-02 -1.2172E-02 -5.5839E-04 4.8377E-03 S13 -2.6431E+00 3.2931E-01 4.1382E-03 -2.8016E-03 -2.5181E-03 -4.2958E-04 3.3682E-03 S14 -5.4295E+00 9.0913E-01 -2.6473E-01 9.4578E-02 -3.1915E-02 1.3939E-02 -2.5538E-03 Face number A18 A20 A22 A24 A26 A28 A30 S1 2.6378E-03 4.0899E-03 1.2282E-03 1.1789E-03 3.8729E-04 2.4407E-04 5.8870E-05 S2 1.4436E-03 4.6982E-04 -8.4223E-05 -2.9145E-04 -8.4884E-05 -8.5521E-06 3.3687E-05 S3 7.5112E-05 2.4086E-05 3.7699E-06 9.1488E-06 1.6361E-06 -2.5324E-06 -1.4303E-07 S4 8.7697E-06 -7.2490E-06 -1.9652E-06 8.3918E-07 0.0000E+00 0.0000E+00 0.0000E+00 S5 9.5978E-06 -6.5613E-06 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 S6 4.8121E-05 3.3059E-05 8.5415E-06 1.7319E-07 -5.1031E-06 4.1642E-07 0.0000E+00 S7 -3.3614E-06 -3.4746E-05 -6.5736E-06 -6.6521E-06 2.7183E-06 -1.7536E-06 7.8543E-07 S8 -1.8949E-04 9.8447E-06 -2.3943E-05 -5.3738E-05 -7.2808E-06 -7.6783E-06 7.5542E-06 S9 -4.4656E-04 5.0578E-05 1.9308E-06 -2.5445E-05 2.6379E-05 -5.4651E-06 0.0000E+00 S10 -5.8872E-04 3.4940E-04 -1.4546E-04 5.8173E-05 -1.4405E-05 0.0000E+00 0.0000E+00 S11 -1.3816E-03 6.7038E-04 -1.2426E-04 1.1262E-04 -9.7402E-05 3.8369E-05 -8.0400E-06 S12 5.2771E-04 -9.6470E-05 -2.5074E-04 -2.0128E-06 3.9676E-05 5.4460E-05 -3.1498E-05 S13 -9.7517E-05 5.1078E-04 2.6492E-04 -4.5727E-04 -2.8773E-04 4.0389E-05 5.7543E-05 S14 1.8000E-03 5.2465E-04 4.1474E-05 -3.1751E-04 -9.6018E-05 -1.0861E-04 7.0639E-05

[0117] Fig.11 The axial chromatic aberration curve of the optical imaging lens of the second embodiment is shown, which indicates the deviation of the focusing point of light of different wavelengths after passing through the optical imaging lens. Fig.12 The astigmatism curve of the optical imaging lens of the second embodiment is shown, which represents the meridional image curvature and the sagittal image curvature. Fig.13 The distortion curve of the optical imaging lens of the second embodiment is shown, which indicates the distortion magnitude values ​​corresponding to different field angles.

[0118] according to Figures 11 to 13 It can be seen that the optical imaging lens provided in the second embodiment can achieve good imaging quality.

[0119] Embodiment 3

[0120] like Figures 14 to 19 As shown, the optical imaging lens of embodiment 3 is described. Fig.14 FIG. 1 is a schematic diagram showing the structure of the optical imaging lens of Embodiment 3 under Embodiment 3-1, Fig.15 FIG. 2 shows a schematic diagram of the structure of the optical imaging lens of Example 3 under Example 3-2, Fig.16 A schematic structural diagram of the optical imaging lens of the third embodiment under embodiment 3-3 is shown.

[0121] like Figures 14 to 16 As shown, the optical imaging lens includes a lens barrel P0 and arranged in sequence from the object side to the image side along the optical axis of the lens barrel P0 in the lens barrel P0: a first lens E1, a first spacer P1, a second lens E2, a second spacer P2, a third lens E3, a third spacer P3, a fourth lens E4, a fourth spacer P4, a fifth lens E5, a fifth spacer P5, a sixth lens E6, a sixth spacer P6, and a seventh lens E7.

[0122] like Fig.14As shown, in the optical imaging lens in Example 3-1, the object side surface and image side surface of the first spacer P1 are respectively in contact with the image side surface S2 of the first lens and the object side surface S3 of the second lens. The object side surface and image side surface of the second spacer P2 are respectively in contact with the image side surface S4 of the second lens and the object side surface S5 of the third lens. The object side surface and image side surface of the third spacer P3 are respectively in contact with the image side surface S6 of the third lens and the object side surface S7 of the fourth lens. The object side surface and image side surface of the fourth spacer P4 are respectively in contact with the image side surface S8 of the fourth lens and the object side surface S9 of the fifth lens. The object side surface and image side surface of the fifth spacer P5 are respectively in contact with the image side surface S10 of the fifth lens and the object side surface S11 of the sixth lens. The object side surface and image side surface of the sixth spacer P6 are respectively in contact with the image side surface S12 of the sixth lens and the object side surface S13 of the seventh lens.

[0123] like Fig.15 As shown, in the optical imaging lens in Example 3-2, the supporting and abutting manner of each spacer is the same as that in Example 3-1. Please refer to the relevant description in Example 3-1 and will not be repeated here.

[0124] like Fig.16 As shown, in the optical imaging lens in Example 3-3, the supporting and abutting manner of each spacer is the same as that in Example 3-1. Please refer to the relevant description in Example 3-1 and will not be repeated here.

[0125] In summary, the structural parameters of the optical imaging lens of Example 3 are as follows:

[0126] As shown in Table 7. (Unit: mm)

[0127]

[0128]

[0129] Table 7

[0130] In Embodiment 3, the object side surface S1 of the first lens is a concave surface, and the image side surface S2 of the first lens is a concave surface. The object side surface S3 of the second lens is a convex surface, and the image side surface S4 of the second lens is a concave surface. The object side surface S5 of the third lens is a convex surface, and the image side surface S6 of the third lens is a convex surface. The object side surface S7 of the fourth lens is a convex surface, and the image side surface S8 of the fourth lens is a convex surface. The object side surface S9 of the fifth lens is a concave surface, and the image side surface S10 of the fifth lens is a convex surface. The object side surface S11 of the sixth lens is a convex surface, and the image side surface S12 of the sixth lens is a convex surface. The object side surface S13 of the seventh lens is a convex surface, and the image side surface S14 of the seventh lens is a concave surface.

[0131] In Example 3, the effective focal length of the optical imaging lens is 1.98 mm, the effective focal length f1 of the first lens is -3.21 mm, the effective focal length f2 of the second lens is 7.59 mm, the effective focal length f3 of the third lens is 5.05 mm, the effective focal length f4 of the fourth lens is 3.69 mm, the effective focal length f5 of the fifth lens is -3.41 mm, the effective focal length f6 of the sixth lens is 3.17 mm, the effective focal length of the seventh lens is -12.91 mm, half of the maximum field of view Semi-FOV of the optical imaging lens is 62.27°, and the entrance pupil diameter EPD of the optical imaging lens is 1.00 mm.

[0132] Table 8 shows a basic structural parameter table of the optical imaging lens of Example 3, wherein the units of the radius of curvature and thickness / distance are all millimeters.

[0133]

[0134]

[0135] Table 8

[0136] Table 9 below gives the higher-order coefficients A4, A6, A8, A10, A12, A14, A16, A18, A20, A22, A24, A26, A28 and A30 that can be used for each aspherical mirror surface S1-S14 in Example 3.

[0137] Face number A4 A6 A8 A10 A12 A14 A16 S1 1.0241E+00 -1.6226E-01 6.3759E-02 -1.6410E-02 7.3153E-03 -2.3925E-03 1.1519E-03 S2 1.5283E-01 -2.8176E-02 2.6355E-03 -1.2613E-03 -1.5054E-03 1.1260E-04 1.0106E-04 S3 6.1233E-03 -5.4528E-03 -6.5342E-03 -9.1381E-04 1.4625E-04 2.0590E-04 5.3207E-05 S4 5.0789E-02 -1.9462E-03 -9.3810E-04 -4.0530E-04 3.4262E-04 -1.2307E-04 7.5756E-05 S5 3.1919E-03 3.9877E-04 -5.3406E-04 1.5949E-04 -1.0788E-04 7.3197E-05 -4.0573E-05 S6 3.3090E-02 7.7986E-04 -2.0687E-03 4.6059E-03 -3.0459E-03 8.8260E-04 -1.8994E-04 S7 -1.5663E-01 1.0581E-02 -2.9067E-03 8.3072E-04 4.3325E-04 7.6492E-04 -1.5544E-04 S8 -9.9689E-02 -2.8103E-02 9.5094E-03 -1.0052E-04 2.5635E-03 8.2519E-04 1.2727E-03 S9 -1.1989E-01 -5.3727E-03 -8.4099E-04 4.6551E-03 1.2781E-03 3.0327E-04 6.5360E-04 S10 1.8272E-02 -1.7212E-03 -8.5561E-03 6.3750E-03 1.6490E-03 1.1186E-03 -1.5045E-03 S11 -4.8043E-01 -1.4103E-02 2.2717E-03 -5.4032E-03 -3.3950E-04 -2.4758E-03 5.1414E-04 S12 1.5017E-01 -5.3166E-02 1.8958E-02 -1.3314E-02 3.5838E-03 -4.3129E-03 2.8585E-03 S13 -1.2033E+00 1.5079E-01 -3.8009E-03 -2.3672E-03 6.9533E-03 -3.9861E-03 5.7022E-03 S14 -2.9346E+00 5.1013E-01 -1.1206E-01 3.7928E-02 -9.7592E-03 3.1089E-03 2.7299E-03 Face number A18 A20 A22 A24 A26 A28 A30 S1 -6.5848E-04 3.4305E-04 -1.2033E-04 1.7675E-05 1.2618E-05 -2.0987E-05 0.0000E+00 S2 3.8403E-04 -2.0688E-04 1.1310E-04 -6.2373E-05 0.0000E+00 0.0000E+00 0.0000E+00 S3 -3.4609E-05 1.5139E-05 -1.3011E-05 -8.5771E-07 -5.3694E-06 6.0496E-06 0.0000E+00 S4 -9.0576E-05 5.2309E-05 -2.3398E-05 4.0945E-05 -1.6480E-05 0.0000E+00 0.0000E+00 S5 5.5344E-05 -1.8402E-05 2.6374E-05 -1.0517E-05 0.0000E+00 0.0000E+00 0.0000E+00 S6 -1.3229E-04 -6.1860E-05 -7.8401E-06 -1.4136E-04 -2.7918E-04 -8.5457E-05 0.0000E+00 S7 7.7935E-05 -1.2762E-04 7.2698E-05 -8.6614E-05 2.9255E-05 0.0000E+00 0.0000E+00 S8 -4.1797E-04 -2.0023E-04 -4.1328E-05 -9.1186E-05 -4.6933E-06 2.4851E-05 0.0000E+00 S9 -6.3380E-04 -2.7067E-04 1.3876E-04 -1.5488E-04 7.6249E-05 0.0000E+00 0.0000E+00 S10 -1.2047E-03 -3.7049E-04 -4.9730E-04 2.2383E-04 1.1789E-04 -3.4906E-05 0.0000E+00 S11 -1.2450E-05 4.8510E-05 1.0727E-04 -1.4879E-04 9.5149E-05 0.0000E+00 0.0000E+00 S12 -6.8389E-04 1.9074E-05 7.3455E-05 -2.3307E-04 -1.1309E-04 1.3152E-04 0.0000E+00 S13 -3.5847E-03 1.2567E-04 5.5425E-04 -4.1794E-04 1.2581E-04 0.0000E+00 0.0000E+00 S14 -3.4904E-03 1.4870E-03 -3.5932E-04 8.8238E-05 1.1333E-04 -1.0342E-04 0.0000E+00

[0138] Table 9

[0139] Fig.17 The axial chromatic aberration curve of the optical imaging lens of the third embodiment 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 the third embodiment is shown, which represents the meridional image curvature and the sagittal image curvature. Fig.19 The distortion curve of the optical imaging lens of the third embodiment is shown, which indicates the distortion magnitude values ​​corresponding to different field angles.

[0140] according to Figures 17 to 19 It can be seen that the optical imaging lens provided in the third embodiment can achieve good imaging quality.

[0141] In summary, Embodiment 1 to Embodiment 3 respectively satisfy the relationship shown in Table 10.

[0142] Conditional / Example 1-1 1-2 1-3 2-1 2-2 2-3 3-1 3-2 3-3 EP45 / CT5 2.67 2.40 2.77 3.04 2.44 3.00 2.40 1.90 1.90 R8 / R9 2.00 2.00 2.00 3.78 3.78 3.78 1.89 1.89 1.89 d4s / (f4-f5) 0.26 0.26 0.25 0.28 0.28 0.30 0.35 0.36 0.36 f2 / (d1s-d2s) 6.84 6.84 5.84 7.78 5.96 7.31 4.57 4.57 4.72 (D1m-d1m) / T12 5.54 5.33 3.15 5.08 4.77 3.81 4.09 4.28 2.93 d2s / R4-d2m / R5 0.62 0.62 0.62 0.21 0.21 0.21 -0.08 -0.08 -0.08 (D3m-d3s) / (f4-f3) 11.30 4.25 7.49 3.58 2.15 2.67 -4.11 -4.13 -2.93 d2m / (DT22-DT31) 6.22 6.22 6.22 -17.86 -17.86 -17.86 2.11 2.11 2.11 |D2s-D1s| / (DT12-DT22) 0.05 0.05 0.06 0.05 0.05 0.02 0.09 0.09 0.05 d5s / R10-d4m / R9 0.67 0.24 0.67 0.91 0.65 1.01 0.97 0.80 0.73 (d1s-d2s) / (d3s-d2s) 2.61 0.34 2.90 1.66 0.56 1.83 2.81 2.18 2.98 d5s / DT52-d5m / DT61 0.22 0.35 0.21 0.19 0.22 0.18 0.18 0.18 0.27 d6s / (CT6+CT7) 2.61 2.61 2.61 2.48 2.48 2.53 3.30 3.63 3.96 D1s / D6m+DT11 / DT72 1.94 1.94 1.73 2.04 2.04 1.87 2.01 2.03 1.85

[0143] Table 10

[0144] Obviously, the embodiments described above are only some embodiments of the utility model, not all embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the utility model.

[0145] 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.

[0146] 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.

[0147] The above description is only the preferred embodiment of the utility model, and is not intended to limit the utility model. For those skilled in the art, the utility model can have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model shall be included in the protection scope of the utility model.

Claims

1. An optical imaging lens, characterized in that: The lens barrel comprises seven lenses and a plurality of spacers, wherein the seven lenses and the plurality of spacers are arranged in the lens barrel. The seven lenses include, from the object side to the image side, a first lens with negative optical power, a second lens with positive optical power, a third lens with positive optical power, a fourth lens with positive optical power, a fifth lens with negative optical power, a sixth lens with positive optical power and a seventh lens with negative optical power, wherein an air gap is provided between two adjacent lenses from the first lens to the seventh lens; The plurality of spacers include at least a fourth spacer and a fifth spacer, the fourth spacer is located between the fourth lens and the fifth lens and abuts against the image side surface of the fourth lens, and the fifth spacer is located between the fifth lens and the sixth lens and abuts against the image side surface of the fifth lens; The distance EP45 between the image side surface of the fourth spacer and the object side surface of the fifth spacer on the optical axis and the center thickness CT5 of the fifth lens satisfy the following conditions: 1 <EP45 / CT5<4; The curvature radius R8 of the image side surface of the fourth lens and the curvature radius R9 of the object side surface of the fifth lens satisfy: 1 <R8 / R9<4; The inner diameter d4s of the object side surface of the fourth spacer, the effective focal length f4 of the fourth lens and the effective focal length f5 of the fifth lens satisfy: <d4s / (f4-f5)<0.5。 2. The optical imaging lens according to claim 1, wherein: The plurality of spacers further include a first spacer and a second spacer, the first spacer being located between the first lens and the second lens and abutting against the image side surface of the first lens, and the second spacer being located between the second lens and the third lens and abutting against the image side surface of the second lens. The inner diameter d1s of the object side surface of the first spacer, the inner diameter d2s of the object side surface of the second spacer and the effective focal length f2 of the second lens satisfy: <f2 / (d1s-d2s)<10。 3. The optical imaging lens according to claim 1, wherein: The plurality of spacers further include a first spacer, the first spacer being located between the first lens and the second lens and abutting against the image side surface portion of the first lens, The inner diameter d1m of the image side surface of the first spacer, the outer diameter D1m of the image side surface of the first spacer, and the distance T12 from the image side surface of the first lens to the object side surface of the second lens on the optical axis satisfy: 2<(D1m-d1m) / T12<6.

4. The optical imaging lens according to claim 1, wherein: The plurality of spacers further includes a second spacer, the second spacer being located between the second lens and the third lens and abutting against the image side surface of the second lens. The inner diameter d2s of the object side surface of the second spacer, the inner diameter d2m of the image side surface of the second spacer, the curvature radius R4 of the image side surface of the second lens, and the curvature radius R5 of the object side surface of the third lens satisfy: -0.5 <d2s / R4-d2m / R5<1。 5. The optical imaging lens according to claim 1, wherein: The plurality of spacers further includes a third spacer, the third spacer being located between the third lens and the fourth lens and abutting against the image side surface portion of the third lens, The inner diameter d3s of the object side surface of the third spacer, the outer diameter D3m of the image side surface of the third spacer, the effective focal length f3 of the third lens and the effective focal length f4 of the fourth lens satisfy: -5<(D3m-d3s) / (f4-f3)<15.

6. The optical imaging lens according to claim 1, wherein: The plurality of spacers further includes a second spacer, the second spacer being located between the second lens and the third lens and abutting against the image side surface of the second lens. The inner diameter d2m of the image-side surface of the second spacer, the effective diameter DT31 of the central light-transmitting area of ​​the object-side surface of the third lens, and the effective diameter DT22 of the central light-transmitting area of ​​the image-side surface of the second lens satisfy: -18 <d2m / (DT22-DT31)<8。 7. The optical imaging lens according to claim 1, wherein: The plurality of spacers further include a first spacer and a second spacer, the first spacer being located between the first lens and the second lens and abutting against the image side surface of the first lens, and the second spacer being located between the second lens and the third lens and abutting against the image side surface of the second lens. The outer diameter D1s of the object side surface of the first spacer, the outer diameter D2s of the object side surface of the second spacer, the effective diameter DT12 of the central light-transmitting area of ​​the image side surface of the first lens and the effective diameter DT22 of the central light-transmitting area of ​​the image side surface of the second lens satisfy the following: 0<|D2s-D1s| / (DT12-DT22)<0.

1.

8. The optical imaging lens according to claim 1, wherein: The inner diameter d5s of the object side surface of the fifth spacer, the inner diameter d4m of the image side surface of the fourth spacer, the curvature radius R9 of the object side surface of the fifth lens and the curvature radius R10 of the image side surface of the fifth lens satisfy: <d5s / R10-d4m / R9<1.5。 9. The optical imaging lens according to claim 1, wherein: The plurality of spacers further include a first spacer, a second spacer, and a third spacer, the first spacer being located between the first lens and the second lens and abutting against the image side surface of the first lens, the second spacer being located between the second lens and the third lens and abutting against the image side surface of the second lens, and the third spacer being located between the third lens and the fourth lens and abutting against the image side surface of the third lens, Among the plurality of spacers, the second spacer has the smallest inner diameter; An inner diameter d1s of the object side surface of the first spacer, an inner diameter d2s of the object side surface of the second spacer, and an inner diameter d3s of the object side surface of the third spacer satisfy 0<(d1s-d2s) / (d3s-d2s)<3.

10. The optical imaging lens according to claim 1, wherein: The inner diameter d5s of the object side surface of the fifth spacer, the inner diameter d5m of the image side surface of the fifth spacer, the effective diameter DT52 of the central light-transmitting area of ​​the image side surface of the fifth lens, and the effective diameter DT61 of the central light-transmitting area of ​​the object side surface of the sixth lens satisfy: <d5s / DT52-d5m / DT61<0.5。 11. The optical imaging lens according to claim 1, wherein: The plurality of spacers further includes a sixth spacer, the sixth spacer being located between the sixth lens and the seventh lens and abutting against the image side surface of the sixth lens. The inner diameter d6s of the object side of the sixth spacer, the center thickness CT6 of the sixth lens and the center thickness CT7 of the seventh lens satisfy: <d6s / (CT6+CT7)<5。 12. The optical imaging lens according to claim 1, wherein: The plurality of spacers further include a first spacer and a sixth spacer, wherein the first spacer is located between the first lens and the second lens and abuts against the image side surface of the first lens, and the sixth spacer is located between the sixth lens and the seventh lens and abuts against the image side surface of the sixth lens. The outer diameter D1s of the object side surface of the first spacer, the outer diameter D6m of the image side surface of the sixth spacer, the effective diameter DT11 of the central light-transmitting area of ​​the object side surface of the first lens, and the effective diameter DT72 of the central light-transmitting area of ​​the image side surface of the seventh lens satisfy the following relationship: 1.7 <D1s / D6m+DT11 / DT72<2.1。

Images