Optical imaging lens

Abstract

The invention provides an optical imaging lens. The optical imaging lens comprises a lens barrel, and a lens group and a spacing assembly which are accommodated in the lens barrel, the lens group comprises a first lens with negative focal power, a second lens with negative focal power, a third lens with positive focal power, a fourth lens with positive focal power, a fifth lens with positive focal power, a sixth lens with negative focal power and a seventh lens with positive focal power which are sequentially arranged from the object side to the image side along the optical axis; wherein the image side surface of the fifth lens is glued with the object side surface of the sixth lens, and the spacing assembly comprises a second spacing element which is arranged between the second lens and the third lens and is in contact with the image side surface of the second lens; the third spacing element is arranged on the image side of the third lens and is in contact with the image side surface of the third lens; the sixth spacing element is arranged between the sixth lens and the seventh lens and is in contact with the image side surface of the sixth lens; the optical imaging lens satisfies the following conditions:-6.20 mm < f2 * tan (FOV / 4) <-5.60 mm; and 5.50 mm < (D2s-d2s) * f1 / f2 < 7.55 mm.

Description

Technical Field

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

[0002] With the development of intelligent devices, instruments such as drones, floor cleaning robots, and surveillance cameras are becoming more and more popular in life. The imaging lenses equipped in these devices have been a research hotspot in recent years. Most of the imaging lenses equipped in these devices have problems such as a small field of view angle, poor imaging quality, or irregular distortion shape and large distortion value, making it more difficult to perform lens imaging correction in the later stage. In addition, some devices achieve all-round large-angle imaging by mounting multiple lenses, which will lead to an increase in the volume, cost, and positive electrode design difficulty of the device. Therefore, there is a need to design and develop an imaging lens that takes into account miniaturization, a large field of view angle, high imaging quality, and small distortion. Summary of the Invention

[0003] One advantage of the present application is to provide an optical imaging lens, which can achieve the advantages of a fish-eye field of view angle, high imaging quality, and small distortion by setting a cemented lens, contributing to the miniaturization of the lens, making the lens have the characteristics of a smaller overall size, lighter weight, and more flexible usage scenarios, thus making the lens have strong market competitiveness.

[0004] Another advantage of the present application is to provide an optical imaging lens, which can block stray light, converge light rays, and improve imaging quality by controlling the structure of the spacer element and reasonably distributing the optical power of the lenses.

[0005] The present application provides an optical imaging lens, comprising: a lens barrel, and a lens group and a spacer assembly accommodated within the lens barrel; the lens group includes, arranged in sequence from the object side to the image side along the optical axis: a first lens with a negative focal power, a second lens with a negative focal power, a third lens with a positive focal power, a fourth lens with a positive focal power, a fifth lens with a positive focal power, a sixth lens with a negative focal power, and a seventh lens with a positive focal power; wherein, the object side surface and the image side surface of the first lens are convex and concave respectively; the object side surface and the image side surface of the second lens are convex and concave respectively; the object side surface and the image side surface of the third lens are convex and concave respectively; the image side surface of the fourth lens is convex; the object side surface and the image side surface of the fifth lens are both convex; the object side surface and the image side surface of the sixth lens are both concave; the object side surface and the image side surface of the seventh lens are both convex, and the image side surface of the fifth lens is cemented to the object side surface of the sixth lens; the spacer assembly includes a second spacer element disposed between the second lens and the third lens and in contact with the image side surface of the second lens, a third spacer element disposed on the image side of the third lens and in contact with the image side surface of the third lens, and a sixth spacer element disposed between the sixth lens and the seventh lens and in contact with the image side surface of the sixth lens; the optical imaging lens satisfies:

[0006] -6.20mm < f2 * tan(FOV / 4) < -5.60mm; and

[0007] 5.50mm < (D2s - d2s) * f1 / f2 < 7.55mm;

[0008] wherein, f1 is the effective focal length of the first lens, f2 is the effective focal length of the second lens, f is the effective focal length of the optical imaging lens, FOV is the maximum field of view angle of the optical imaging lens, D2s is the object side outer diameter of the second spacer element, and d2s is the object side inner diameter of the second spacer element.

[0009] According to some embodiments of the present application, the optical imaging lens satisfies:

[0010] 1.45 ≤ (EP02 + CP2) / T23 < 2.50;

[0011] wherein, EP02 is the distance between the object side surface of the lens barrel and the object side surface of the second spacer element, CP2 is the maximum thickness of the second spacer element, and T23 is the air gap distance between the centers of the second lens and the third lens in the optical axis direction.

[0012] According to some embodiments of the present application, the optical imaging lens satisfies:

[0013] 4.30 < (D2s - d2s) / T23 < 6.30;

[0014] Wherein, T23 is the air gap distance between the centers of the second lens and the third lens in the optical axis direction, D2s is the object-side outer diameter of the second spacer element, and d2s is the object-side inner diameter of the second spacer element.

[0015] According to some embodiments of the present application, the optical imaging lens satisfies:

[0016] 1.10 < CP2 / R4 * 100 < 3.90;

[0017] Wherein, CP2 is the maximum thickness of the second spacer element, and R4 is the curvature radius of the image-side surface of the second lens.

[0018] According to some embodiments of the present application, the optical imaging lens satisfies:

[0019] 0.90 < d2s / d3s < 1.50;

[0020] Wherein, d2s is the object-side inner diameter of the second spacer element, and d3s is the object-side inner diameter of the third spacer element.

[0021] According to some embodiments of the present application, the optical imaging lens satisfies:

[0022] 0.70 < L / (CT1 + T12) < 0.90;

[0023] Wherein, L is the distance from the object-side surface of the lens barrel to the image-side surface of the lens barrel, CT1 is the central thickness of the first lens on the optical axis, and T12 is the air gap distance between the centers of the first lens and the second lens in the optical axis direction.

[0024] According to some embodiments of the present application, the optical imaging lens satisfies:

[0025] 1.90 < (CT5 + CT6) / CP6 < 2.65;

[0026] Wherein, CT5 is the central thickness of the fifth lens on the optical axis, CT6 is the central thickness of the sixth lens on the optical axis, and CP6 is the maximum thickness of the sixth spacer element.

[0027] According to some embodiments of the present application, the optical imaging lens satisfies:

[0028] 3.65 mm < L / f7 * CT7 ≤ 4.80 mm;

[0029] Wherein, L is the distance from the object-side surface of the lens barrel to the image-side surface of the lens barrel, f7 is the effective focal length of the seventh lens, and CT7 is the central thickness of the seventh lens on the optical axis.

[0030] According to some embodiments of the present application, the optical imaging lens satisfies:

[0031] -4.65 < f6 / (D6s - d6s) < -2.05;

[0032] wherein, f6 is the effective focal length of the sixth lens, D6s is the object-side outer diameter of the sixth spacer element, and d6s is the object-side inner diameter of the sixth spacer element.

[0033] According to some embodiments of the present application, the optical imaging lens satisfies:

[0034] 11.55 < TD / (D0s - d0s) < 24.75;

[0035] wherein, TD is the central distance along the optical axis from the object side surface of the first lens to the image side surface of the seventh lens, D0s is the object-side outer diameter of the lens barrel, and d0s is the object-side inner diameter of the lens barrel.

[0036] According to some embodiments of the present application, the optical imaging lens satisfies:

[0037] 1.30 < R12 / D6m < 2.50;

[0038] wherein, R12 is the image-side curvature radius of the sixth lens, and D6m is the image-side outer diameter of the sixth spacer element.

[0039] According to some embodiments of the present application, the optical imaging lens satisfies:

[0040] 2.20 < (D3m - d3m) / CT4 < 4.10;

[0041] wherein, D3m is the image-side outer diameter of the third spacer element, d3m is the image-side inner diameter of the third spacer element, and CT4 is the central thickness of the fourth lens on the optical axis.

[0042] According to some embodiments of the present application, the optical imaging lens satisfies:

[0043] 2.35 < D2m / d2m < 2.70;

[0044] wherein, d2m is the image-side inner diameter of the second spacer element, and D2m is the image-side outer diameter of the second spacer element.

[0045] According to some embodiments of the present application, the optical imaging lens satisfies:

[0046] 3.95 < T34*V3 / (D3s - d3s) < 7.35;

[0047] Wherein, T34 is the air gap distance between the centers of the third lens and the fourth lens in the optical axis direction, V3 is the Abbe number of the material of the third lens, D3s is the outer diameter of the object side of the third spacer element, and d3s is the inner diameter of the object side of the third spacer element.

[0048] According to some embodiments of the present application, the optical imaging lens satisfies:

[0049] 1.35 < f / (D0s - d0s) < 3.05;

[0050] Wherein, f is the effective focal length of the optical imaging lens, D0s is the outer diameter of the object side of the lens barrel, and d0s is the inner diameter of the object side of the lens barrel.

[0051] In summary, by gluing the fifth lens and the sixth lens, the optical imaging lens of the present application can achieve the advantages of a fish-eye field of view angle, high imaging quality, and small distortion, which helps to miniaturize the lens, making the lens have the characteristics of a smaller overall size, lighter weight, and more flexible usage scenarios, thus making the lens have strong market competitiveness. By controlling the structure of the spacer element and reasonably distributing the optical power of the lenses, stray light can be blocked, light rays can be converged, and the imaging quality can be improved. However, the optical imaging lens of the present application is a seven-piece ultra-wide-angle large-aperture mobile phone lens, and distortion problems are likely to occur. To ensure high imaging quality, the trend of light rays needs to be effectively controlled. Therefore, by constraining the concave-convex shapes of the surfaces of the first lens to the seventh lens, the light rays on the image plane can be converged, stray light can be reduced, and the imaging quality can be improved. By controlling the relational expression -6.20mm < f2 * tan(FOV / 4) < -5.60mm, the field of view angle of the system can be increased as much as possible while ensuring the processability of the curvature of the second lens, so as to achieve a fish-eye effect and make the lens achieve an ultra-wide angle. On the premise that the lens meets the ultra-wide angle, by controlling the relational expression 5.50mm < (D2s - d2s) * f1 / f2 < 7.55mm, on the one hand, the optical power of the first lens and the second lens can be more reasonably distributed, which is beneficial to correcting the aberrations of the system. On the other hand, the stray light at the edge of the second lens can be effectively intercepted, and the phenomenon of light source trailing under a large field of view angle can be prevented, thereby improving the imaging quality. BRIEF DESCRIPTION OF THE DRAWINGS

[0052] Figure 1 is a schematic diagram of the structural parameters of an optical imaging lens according to an embodiment of the present application;

[0053] Figure 2 is a schematic structural diagram of an optical imaging lens according to Embodiment 1 of the present application;

[0054] Figure 3 is a schematic structural diagram of an optical imaging lens according to Embodiment 2 of the present application;

[0055] Figure 4 It is a schematic structural diagram of an optical imaging lens according to Embodiment 3 of the present application;

[0056] Figure 5A It shows a schematic diagram of the axial chromatic aberration curve of the optical imaging lens according to Embodiment 1, Embodiment 2, and Embodiment 3 of the present application;

[0057] Figure 5B It shows a schematic diagram of the astigmatism curve of the optical imaging lens according to Embodiment 1, Embodiment 2, and Embodiment 3 of the present application;

[0058] Figure 5C It shows a schematic diagram of the distortion curve of the optical imaging lens according to Embodiment 1, Embodiment 2, and Embodiment 3 of the present application;

[0059] Figure 5D It shows a schematic diagram of the longitudinal chromatic aberration curve of the optical imaging lens according to Embodiment 1, Embodiment 2, and Embodiment 3 of the present application;

[0060] Figure 6 It is a schematic structural diagram of an optical imaging lens according to Embodiment 4 of the present application;

[0061] Figure 7 It is a schematic structural diagram of an optical imaging lens according to Embodiment 5 of the present application;

[0062] Figure 8 It is a schematic structural diagram of an optical imaging lens according to Embodiment 6 of the present application;

[0063] Figure 9A It shows a schematic diagram of the axial chromatic aberration curve of the optical imaging lens according to Embodiment 4, Embodiment 5, and Embodiment 6 of the present application;

[0064] Figure 9B It shows a schematic diagram of the astigmatism curve of the optical imaging lens according to Embodiment 4, Embodiment 5, and Embodiment 6 of the present application;

[0065] Figure 9C It shows a schematic diagram of the distortion curve of the optical imaging lens according to Embodiment 4, Embodiment 5, and Embodiment 6 of the present application;

[0066] Figure 9D It shows a schematic diagram of the longitudinal chromatic aberration curve of the optical imaging lens according to Embodiment 4, Embodiment 5, and Embodiment 6 of the present application;

[0067] Figure 10 It is a schematic structural diagram of an optical imaging lens according to Embodiment 7 of the present application;

[0068] Figure 11 It is a schematic structural diagram of an optical imaging lens according to Embodiment 8 of the present application;

[0069] Figure 12 It is a schematic structural diagram of an optical imaging lens according to Embodiment 9 of the present application;

[0070] Figure 13A It shows a schematic diagram of the axial chromatic aberration curve of the optical imaging lens according to Embodiment 7, Embodiment 8, and Embodiment 9 of the present application;

[0071] Figure 13B It shows a schematic diagram of the astigmatism curve of the optical imaging lens according to Embodiment 7, Embodiment 8, and Embodiment 9 of the present application;

[0072] Figure 13C It shows a schematic diagram of the distortion curve of the optical imaging lens according to Embodiment 7, Embodiment 8, and Embodiment 9 of the present application;

[0073] Figure 13D It shows a schematic diagram of the longitudinal chromatic aberration curve of the optical imaging lens according to Embodiment 7, Embodiment 8, and Embodiment 9 of the present application;

[0074] Figure 14A It shows a schematic optical path diagram when the optical imaging lens satisfies the relationship (D2s - d2s)*f1 / f2 = 4.1 mm;

[0075] Figure 14B It shows a schematic diagram of the illuminance when the optical imaging lens satisfies the relationship (D2s - d2s)*f1 / f2 = 4.1 mm;

[0076] Figure 15A It shows a schematic optical path diagram when the optical imaging lens satisfies the relationship (D2s - d2s)*f1 / f2 = 5.9 mm;

[0077] Figure 15B It shows a schematic diagram of the illuminance when the optical imaging lens satisfies the relationship (D2s - d2s)*f1 / f2 = 5.9 mm;

[0078] Figure 16A It shows a schematic optical path diagram when the optical imaging lens satisfies the relationship (D2s - d2s)*f1 / f2 = 6.7 mm;

[0079] Figure 16B It shows a schematic diagram of the illuminance when the optical imaging lens satisfies the relationship (D2s - d2s)*f1 / f2 = 6.7 mm;

[0080] Figure 17AThe optical path diagram is shown when the optical imaging lens satisfies the relation (D2s - d2s) * f1 / f2 = 8.3 mm;

[0081] Figure 17B The illuminance diagram is shown when the optical imaging lens satisfies the relation (D2s - d2s) * f1 / f2 = 8.3 mm. Detailed implementation manners

[0082] To better understand the present application, each aspect of the present application will be described in more detail with reference to the accompanying drawings. It should be understood that these detailed descriptions are only descriptions of the exemplary embodiments of the present application and do not limit the scope of the present application in any way. Throughout the specification, the same reference numerals refer to the same elements. The expression "and / or" includes any and all combinations of one or more of the associated listed items.

[0083] It should be noted that in this specification, the expressions such as first, second, and third are only used to distinguish one feature from another feature and do not represent any limitation on the feature. Therefore, without departing from the teachings of the present application, the first lens discussed below may also be referred to as the second lens or the third lens.

[0084] In the drawings, for ease of illustration, the thickness, size, and shape of the lenses have been slightly exaggerated. Specifically, the spherical or aspherical shapes shown in the drawings are shown by way of example. That is, the spherical or aspherical shapes are not limited to the spherical or aspherical shapes shown in the drawings. The drawings are only examples and are not drawn strictly to scale.

[0085] In this article, the paraxial region refers to the region near the optical axis. If the lens surface is convex and the position of the convex surface is not defined, it means that the lens surface is convex at least in the paraxial region; if the lens surface is concave and the position of the concave surface is not defined, it means that the lens surface is concave at least in the paraxial region. The determination of the surface shape in the paraxial region can be determined according to the general methods in the art. For example, the convexity and concavity are determined by the positive and negative values of the R value (R refers to the radius of curvature of the paraxial region). In this article, the surface of each lens closest to the object to be photographed is called the object side surface of the lens, and the surface of each lens closest to the imaging surface is called the image side surface of the lens. Taking the object side surface as an example, 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; taking the image side surface as an example, 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.

[0086] It should also be understood that the terms "comprise", "comprising", "have", "including" and / or "containing", when used in this specification, denote the presence of the stated features, elements and / or components, but do not preclude the presence or addition of one or more other features, elements, components and / or combinations thereof. Further, when an expression such as "at least one of..." appears after a list of listed features, it modifies the entire list of listed features rather than individual elements in the list. Further, when describing embodiments of the present application, the use of "may" means "one or more embodiments of the present application". Also, the term "exemplary" is intended to refer to an example or illustration.

[0087] Unless otherwise defined, all terms used herein (including technical and scientific terms) have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. It should also be understood that terms (such as those defined in a common dictionary) should be interpreted as having a meaning consistent with their meaning in the context of the relevant art and will not be interpreted in an idealized or overly formalized sense unless expressly so defined herein.

[0088] It should be noted that, without conflict, the embodiments and features in the embodiments of the present application may be combined with each other. The following embodiments merely represent several implementation manners of the present application, and the description thereof is relatively specific and detailed, but it should not be construed as a limitation on the patent scope of the present application. It should be pointed out that for those of ordinary skill in the art, without departing from the concept of the present application, several modifications and improvements can be made, and all of these belong to the protection scope of the present application. The present application will be described in detail below with reference to the drawings and in conjunction with the embodiments. [[ID=...]]

[0089] According to one aspect of the present application, as Figure 1As shown in the figure, an embodiment of the present application provides an optical imaging lens. The optical imaging lens may include a lens barrel and a lens group and a spacer assembly accommodated within the lens barrel; the lens group includes, arranged in order from the object side to the image side along the optical axis: a first lens with negative focal power, a second lens with negative focal power, a third lens with positive focal power, a fourth lens with positive focal power, a fifth lens with positive focal power, a sixth lens with negative focal power, and a seventh lens with positive focal power; wherein, the object side surface and the image side surface of the first lens are convex and concave respectively; the object side surface and the image side surface of the second lens are convex and concave respectively; the object side surface and the image side surface of the third lens are convex and concave respectively; the image side surface of the fourth lens is convex; the object side surface and the image side surface of the fifth lens are both convex; the object side surface and the image side surface of the sixth lens are both concave; the object side surface and the image side surface of the seventh lens are both convex, and the image side surface of the fifth lens is cemented to the object side surface of the sixth lens; the spacer assembly includes a second spacer element placed between the second lens and the third lens and in contact with the image side surface of the second lens, a third spacer element placed on the image side of the third lens and in contact with the image side surface of the third lens, and a sixth spacer element placed between the sixth lens and the seventh lens and in contact with the image side surface of the sixth lens.

[0090] In particular, the optical imaging lens satisfies: -6.20mm < f2 * tan(FOV / 4) < -5.60mm; and 5.50mm < (D2s - d2s) * f1 / f2 < 7.55mm; where f1 is the effective focal length of the first lens, f2 is the effective focal length of the second lens, f is the effective focal length of the optical imaging lens, FOV is the maximum field of view angle of the optical imaging lens, D2s is the object side outer diameter of the second spacer element, and d2s is the object side inner diameter of the second spacer element.

[0091] It should be noted that by gluing the fifth lens and the sixth lens, the optical imaging lens of the present application can achieve the advantages of a fish-eye field of view angle, high imaging quality, and small distortion, which helps to miniaturize the lens, making the lens smaller in overall size, lighter in weight, and more flexible in usage scenarios, thereby making the lens highly competitive in the market. By controlling the spacer element structure and reasonably distributing the optical power of the lenses, stray light can be blocked, light rays can be converged, and imaging quality can be improved. However, the optical imaging lens of the present application is a seven-piece ultra-wide-angle large-aperture mobile phone lens, and distortion problems are likely to occur. To ensure high imaging quality, the trend of light rays needs to be effectively controlled. Therefore, by constraining the concave-convex shapes of the surfaces of the first lens to the seventh lens, the light rays on the image plane can be converged, stray light can be reduced, and imaging quality can be improved. By controlling the relational expression -6.20mm < f2 * tan(FOV / 4) < -5.60mm, the field of view angle of the system can be increased as much as possible while ensuring the processability of the curvature of the second lens, so as to achieve a fish-eye effect and the lens can achieve an ultra-wide angle. On the premise that the lens meets the ultra-wide angle, by controlling the relational expression 5.50mm < (D2s - d2s) * f1 / f2 < 7.55mm, on the one hand, the optical powers of the first lens and the second lens can be more reasonably distributed, which is beneficial to correcting the aberrations of the system. On the other hand, the stray light at the edge of the second lens can be effectively intercepted, and the phenomenon of light source trailing under a large field of view angle can be prevented, thereby improving the imaging quality.

[0092] Exemplarily, Figure 14A shows a schematic optical path diagram of the optical imaging lens when it satisfies the relational expression (D2s - d2s) * f1 / f2 = 4.1mm, Figure 14B shows an illuminance schematic diagram of the optical imaging lens when it satisfies the relational expression (D2s - d2s) * f1 / f2 = 4.1mm; Figure 15A shows a schematic optical path diagram of the optical imaging lens when it satisfies the relational expression (D2s - d2s) * f1 / f2 = 5.9mm, Figure 15B shows an illuminance schematic diagram of the optical imaging lens when it satisfies the relational expression (D2s - d2s) * f1 / f2 = 5.9mm; Figure 16A shows a schematic optical path diagram of the optical imaging lens when it satisfies the relational expression (D2s - d2s) * f1 / f2 = 6.7mm, Figure 16B shows an illuminance schematic diagram of the optical imaging lens when it satisfies the relational expression (D2s - d2s) * f1 / f2 = 6.7mm; Figure 17A shows a schematic optical path diagram of the optical imaging lens when it satisfies the relational expression (D2s - d2s) * f1 / f2 = 8.3mm, Figure 17B shows an illuminance schematic diagram of the optical imaging lens when it satisfies the relational expression (D2s - d2s) * f1 / f2 = 8.3mm. From Figure 14A and Figure 14BIt can be seen that when the value of the relation (D2s - d2s) * f1 / f2 is less than 5.50 mm, the value of (D2s - d2s) * f1 / f2 is on the small side, and there is stray light trailing out at the edge of the outer field of view. From Figure 15A 、 Figure 15B 、 Figure 16A and Figure 16B it can be seen that when the relation (D2s - d2s) * f1 / f2 is in the range greater than 5.5 mm and less than 7.55 mm, the value of (D2s - d2s) * f1 / f2 is set reasonably, and the trailing stray light basically disappears or is within an acceptable range. From Figure 17A and Figure 17B it can be seen that when the relation (D2s - d2s) * f1 / f2 is greater than 7.55 mm, the value of (D2s - d2s) * f1 / f2 is on the large side, and the trailing stray light is obvious.

[0093] Preferably, the optical imaging lens satisfies: -6.16 mm ≤ f2 * tan(FOV / 4) ≤ -5.61 mm; and 5.54 mm ≤ (D2s - d2s) * f1 / f2 ≤ 7.53 mm.

[0094] According to some embodiments of the present application, the optical imaging lens satisfies: 1.45 ≤ (EP02 + CP2) / T23 < 2.50; where EP02 is the distance between the object side of the lens barrel and the object side of the second spacer element, CP2 is the maximum thickness of the second spacer element, and T23 is the air gap distance between the centers of the second lens and the third lens in the optical axis direction.

[0095] In this way, since the image side of the second lens is concave and the object side of the third lens is convex, by controlling the above relation, it is beneficial to control the spatial arrangement of the second lens and the third lens, ensure the processing and forming and the bearing stability of the second lens. In addition, it is also beneficial to the compact assembly at the front end of the lens and reduce the overall size of the lens.

[0096] Preferably, the optical imaging lens satisfies: 1.45 ≤ (EP02 + CP2) / T23 ≤ 2.46.

[0097] According to some embodiments of the present application, the optical imaging lens satisfies: 4.30 < (D2s - d2s) / T23 < 6.30; where T23 is the air gap distance between the centers of the second lens and the third lens in the optical axis direction, D2s is the outer diameter of the object side of the second spacer element, and d2s is the inner diameter of the object side of the second spacer element.

[0098] In this way, by controlling the ratio of the difference between the object-side inner diameter and the object-side outer diameter of the second element and the air gap distance between the centers of the second lens and the third lens in the optical axis direction, not only can the baking deformation of the spacer element be effectively avoided, but also the stray light generated outside the effective diameter of the front and rear lenses can be weakened, enabling the system to have a high imaging quality.

[0099] Preferably, the optical imaging lens satisfies: 4.34 ≤ (D2s - d2s) / T23 ≤ 6.28.

[0100] According to some embodiments of the present application, the optical imaging lens satisfies: 1.10 < CP2 / R4 * 100 < 3.90; where CP2 is the maximum thickness of the second spacer element, and R4 is the curvature radius of the image side surface of the second lens.

[0101] In this way, by controlling the ratio of the curvature radius of the image side surface of the second lens to the thickness of the second spacer element, the shape of the second lens can be effectively controlled, ensuring the convergence of light rays of the second lens, and effectively blocking the light rays outside the effective diameter, reducing the generation of stray light such as light leakage.

[0102] Preferably, the optical imaging lens satisfies: 1.11 ≤ CP2 / R4 * 100 ≤ 3.88.

[0103] According to some embodiments of the present application, the optical imaging lens satisfies: 0.90 < d2s / d3s < 1.50; where d2s is the object-side inner diameter of the second spacer element, and d3s is the object-side inner diameter of the third spacer element.

[0104] In this way, by controlling the ratio of the object-side inner diameters of the second spacer element and the third spacer element within a certain range, on the one hand, it can ensure the convergence of the light rays with a large front-end deflection, intercept the excess light rays, and ensure the imaging clarity. On the other hand, it can avoid risks such as long cantilevers and ensure the stability of later assembly and baking.

[0105] Preferably, the optical imaging lens satisfies: 0.94 ≤ d2s / d3s ≤ 1.49.

[0106] According to some embodiments of the present application, the optical imaging lens satisfies: 0.70 < L / (CT1 + T12) < 0.90; where L is the distance from the object-side surface of the lens barrel to the image-side surface of the lens barrel, CT1 is the central thickness of the first lens on the optical axis, and T12 is the air gap distance between the centers of the first lens and the second lens in the optical axis direction.

[0107] In this way, by controlling the above relationship, on the premise of ensuring the overall miniaturization of the lens, the spatial distribution of the front-end lens in the lens can be made more reasonable, and in addition, it is beneficial to the processing and forming of the first lens, ensuring the production yield.

[0108] Preferably, the optical imaging lens satisfies: 0.71 ≤ L / (CT1 + T12) ≤ 0.87.

[0109] According to some embodiments of the present application, the optical imaging lens satisfies: 1.90 < (CT5 + CT6) / CP6 < 2.65; where CT5 is the central thickness of the fifth lens on the optical axis, CT6 is the central thickness of the sixth lens on the optical axis, and CP6 is the maximum thickness of the sixth spacer element.

[0110] In this way, since the fifth lens and the sixth lens are cemented lenses, it is necessary to ensure that the first lens receiving light is a positive power lens and the second lens receiving light is a negative power lens, that is, the fifth lens is a positive power lens and the sixth lens is a negative power lens. Only by cementing the two lenses can the purpose of correcting chromatic aberration of the optical lens be achieved. By controlling the central thicknesses of the fifth lens and the sixth lens on the optical axis, it is possible to effectively correct the chromatic aberration of the lens and make the production and manufacturing of the lens feasible. At the same time, reasonably controlling the maximum thickness of the sixth spacer element can ensure the stability of the support of the cemented lens formed by the fifth lens and the sixth lens.

[0111] Preferably, the optical imaging lens satisfies: 1.91 ≤ (CT5 + CT6) / CP6 ≤ 2.62.

[0112] According to some embodiments of the present application, the optical imaging lens satisfies: 3.65 mm < L / f7 * CT7 ≤ 4.80 mm; where L is the distance from the object-side surface of the lens barrel to the image-side surface of the lens barrel, f7 is the effective focal length of the seventh lens, and CT7 is the central thickness of the seventh lens on the optical axis.

[0113] In this way, by controlling the above relationship, not only can the overall lens be made more compact, but also it is beneficial to control the incident angle of light from the seventh lens to the image plane, so that the light falls on the photosensitive area of the chip to the greatest extent, ensuring the imaging quality.

[0114] Preferably, the optical imaging lens satisfies: 3.66 mm ≤ L / f7 * CT7 ≤ 4.80 mm.

[0115] According to some embodiments of the present application, the optical imaging lens satisfies: -4.65 < f6 / (D6s - d6s) < -2.05; where f6 is the effective focal length of the sixth lens, D6s is the object-side outer diameter of the sixth spacer element, and d6s is the object-side inner diameter of the sixth spacer element.

[0116] In this way, by restricting the ratio of the effective focal length of the sixth lens to the difference between the outer and inner diameters on the object side of the sixth spacer element, the assembly stability of the sixth lens can be ensured, and the stray light at the edge of the sixth lens can be effectively intercepted to ensure the imaging quality.

[0117] Preferably, the optical imaging lens satisfies: -4.61 ≤ f6 / (D6s - d6s) ≤ -2.09.

[0118] According to some embodiments of the present application, the optical imaging lens satisfies: 11.55 < TD / (D0s - d0s) < 24.75; where TD is the central distance along the optical axis from the object side surface of the first lens to the image side surface of the seventh lens, D0s is the outer diameter of the lens barrel on the object side, and d0s is the inner diameter of the lens barrel on the object side.

[0119] In this way, by controlling the above relationship, it is beneficial to make the arrangement of the lens structure more reasonable and stable to ensure the miniaturization of the lens, and by controlling the difference between the inner diameter and the outer diameter of the image side of the lens barrel, the edge thickness of the lens barrel can be ensured to guarantee the overall assembly stability of the lens.

[0120] Preferably, the optical imaging lens satisfies: 11.56 ≤ TD / (D0s - d0s) ≤ 24.74.

[0121] According to some embodiments of the present application, the optical imaging lens satisfies: 1.30 < R12 / D6m < 2.50; where R12 is the curvature radius of the image side surface of the sixth lens, and D6m is the outer diameter of the image side of the sixth spacer element.

[0122] In this way, since the fifth lens and the sixth lens are glued together to form a cemented lens, by restricting the ratio of the curvature radius of the image side surface of the sixth lens to the outer diameter of the image side of the sixth spacer element, it is beneficial to converge the outgoing light of the sixth lens, correct the field curvature and astigmatism of the system, and improve the imaging clarity.

[0123] Preferably, the optical imaging lens satisfies: 1.32 ≤ R12 / D6m ≤ 2.49.

[0124] According to some embodiments of the present application, the optical imaging lens satisfies: 2.20 < (D3m - d3m) / CT4 < 4.10; where D3m is the outer diameter of the image side of the third spacer element, d3m is the inner diameter of the image side of the third spacer element, and CT4 is the central thickness of the fourth lens on the optical axis.

[0125] In this way, by controlling the above relationship, the central thickness of the fourth lens can be ensured, thereby ensuring the molding stability of the fourth lens to effectively avoid assembly deformation. In addition, by controlling the difference between the inner diameter and the outer diameter of the image side of the third spacer element, the flange bearing area of the fourth lens can be ensured to guarantee the assembly stability.

[0126] Preferably, the optical imaging lens satisfies: 2.24 ≤ (D3m - d3m) / CT4 ≤ 4.09.

[0127] According to some embodiments of the present application, the optical imaging lens satisfies: 2.35 < D2m / d2m < 2.70; where d2m is the image-side inner diameter of the second spacer element, and D2m is the image-side outer diameter of the second spacer element.

[0128] In this way, by controlling the ratio of the image-side inner diameter to the image-side outer diameter of the second spacer element, it is beneficial to improve the stray light caused by the reflection of the effective diameter edge of the image side of the second lens, and can also intercept the light outside the effective diameter, preventing problems such as light source trailing during imaging.

[0129] Preferably, the optical imaging lens satisfies: 2.38 ≤ <d2m / D2m ≤ 2.67.

[0130] According to some embodiments of the present application, the optical imaging lens satisfies: 3.95 < T34*V3 / (D3s - d3s) < 7.35; where T34 is the air gap distance between the centers of the third lens and the fourth lens in the optical axis direction, V3 is the Abbe number of the material of the third lens, D3s is the object-side outer diameter of the third spacer element, and d3s is the object-side inner diameter of the third spacer element.

[0131] In this way, by controlling the material of the third lens and the air gap distance between the centers of the third lens and the fourth lens in the optical axis direction, the focusing of light can be ensured. At the same time, by controlling the difference between the object-side inner diameter and the object-side outer diameter of the third spacer element, stray light can be blocked, the imaging quality can be guaranteed, and it is also beneficial to the connection of the front and rear lens optical systems, ensuring the stability of the overall structure.

[0132] Preferably, the optical imaging lens satisfies: 3.98 ≤ T34*V3 / (D3s - d3s) ≤ 7.32.

[0133] According to some embodiments of the present application, the optical imaging lens satisfies: 1.35 < f / (D0s - d0s) < 3.05; where f is the effective focal length of the optical imaging lens, D0s is the object-side outer diameter of the lens barrel, and d0s is the object-side inner diameter of the lens barrel.

[0134] In this way, by controlling the above relationship, on the one hand, stray light entering the system can be effectively intercepted, improving the imaging quality. On the other hand, it can avoid the lens barrel blocking the effective light, enabling the lens to meet the characteristics of a large field of view and a large aperture.

[0135] Preferably, the optical imaging lens satisfies: 1.37 ≤ f / (D0s - d0s) ≤ 3.02.

[0136] It should be noted that those skilled in the art should understand that, without departing from the technical solution claimed in the present application, the number of spacer elements constituting the intermediate spacer element of the optical imaging lens can be changed to obtain the various results and advantages described in this specification, and the present application does not make specific limitations in this regard. For example, as needed, the optical imaging lens may also include other numbers of spacer elements different from those described in the above embodiments.

[0137] Some specific but non-limiting embodiments of the above embodiments of the present application will be described in more detail below with reference to the accompanying drawings. For the convenience of description, in the following embodiments, OBJ represents the object surface of the optical imaging lens, STO represents the surface of the aperture stop, S1 represents the object side surface of the first lens E1, S2 represents the image side surface of the first lens E1, S3 represents the object side surface of the second lens E2, S4 represents the image side surface of the second lens E2, S5 represents the object side surface of the third lens E3, S6 represents the image side surface of the third lens E3, S7 represents the object side surface of the fourth lens E4, S8 represents the image side surface of the fourth lens E4, S9 represents the object side surface of the fifth lens E5, S10 represents the image side surface of the fifth lens E5, S11 represents the object side surface of the sixth lens E6, S12 represents the image side surface of the sixth lens E6, S13 represents the object side surface of the seventh lens E7, and S14 represents the image side surface of the seventh lens E7. In addition, Aj represents the j-th order aspherical coefficient, where j = 4, 6, 8, 10, 12, 14, 16, 18, 20, 22, 24, 26, 28, 30.

[0138] Embodiment 1

[0139] As Figure 2 shown, in this embodiment, the optical imaging lens includes a lens barrel P0 and a lens group and a spacer assembly accommodated within the lens barrel P0; the lens group includes, in order from the object side to the image side along the optical axis: a first lens E1 with a negative focal power, a second lens E2 with a negative focal power, a third lens E3 with a positive focal power, a fourth lens E4 with a positive focal power, a fifth lens E5 with a positive focal power, a sixth lens E6 with a negative focal power, and a seventh lens E7 with a positive focal power; wherein, the object side surface S1 and the image side surface S2 of the first lens E1 are a convex surface and a concave surface respectively; the object side surface S3 and the image side surface S4 of the second lens E2 are a convex surface and a concave surface respectively; the object side surface S5 and the image side surface S6 of the third lens E3 are a convex surface and a concave surface respectively; the object side surface S7 and the image side surface S8 of the fourth lens E4 are both convex surfaces; the object side surface S9 and the image side surface S10 of the fifth lens E5 are both convex surfaces; the object side surface S11 and the image side surface S12 of the sixth lens E6 are both concave surfaces; the object side surface S13 and the image side surface S14 of the seventh lens E7 are both convex surfaces, and the image side surface S10 of the fifth lens E5 is cemented to the object side surface S11 of the sixth lens E6.

[0140] The spacer assembly includes a second spacer element P2 disposed between the second lens E2 and the third lens E3 and in contact with the image side surface of the second lens E2, a third spacer element P3 disposed between the third lens E3 and the fourth lens E4 and in contact with the image side surface of the third lens E3, and a sixth spacer element P6 disposed between the sixth lens E6 and the seventh lens E7 and in contact with the image side surface of the sixth lens E6.

[0141] In this embodiment, the spacer assembly further includes a third auxiliary spacer element P3b disposed between the third spacer element P3 and the fourth lens E4 and in contact with the image side surface of the third spacer element P3.

[0142] In addition, Table 1 shows the basic optical parameters of the optical imaging lens of Embodiment 1, where the units of the radius of curvature, thickness / distance, and effective radius are all millimeters (mm).

[0143] Table 1: Basic Optical Parameter Table of the Optical Imaging Lens of Embodiment 1

[0144] [[ID=1 =15]]

[0145]

[0146] In this embodiment, except for the first lens E1 and the fourth lens E4, the object side surface and the image side surface of any lens in the lens group are aspherical surfaces. The surface profile x of each aspherical lens can be defined by, but not limited to, the following aspherical formula:

[0147]

[0148] Where x is the sagitta, the distance from the vertex of the aspherical surface when the aspherical surface is along the optical axis at a position with a height of h; c is the paraxial curvature of the aspherical surface, c = 1 / R (that is, 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 correction coefficient of the i-th order of the aspherical surface. Table 2 below gives the higher-order term coefficients A4, A6, A8, A10, A12, A14, A16, A18, A20, A22, A24, A26, A28, A30 that can be used for the aspherical surfaces S3 to S6 and S9 to S13 in Embodiment 4.

[0149] Table 2: Aspherical Coefficient Table of the Optical Imaging Lens of Embodiment 1

[0150] Surface A4 A6 A8 A10 A12 A14 A16 S3 2.54E-02 -3.17E-02 2.71E-02 -3.82E-02 2.57E-02 -9.03E-03 1.62E-03 S4 1.01E-01 2.56E-01 -2.18E+00 9.04E+00 -2.52E+01 4.80E+01 -6.45E+01 S5 5.74E-02 3.79E-01 -2.43E+00 1.01E+01 -2.83E+01 5.58E+01 -7.92E+01 S6 9.80E-02 9.39E-02 -5.75E-01 2.65E+00 -7.36E+00 1.33E+01 -1.60E+01 S9 1.84E-04 -1.17E-02 3.67E-02 -7.33E-02 9.79E-02 -8.77E-02 5.26E-02 S10 -1.57E-01 1.09E-01 -7.21E-02 1.03E-01 -1.71E-01 1.64E-01 -9.37E-02 S11 -1.57E-01 1.09E-01 -7.21E-02 1.03E-01 -1.71E-01 1.64E-01 -9.37E-02 S12 -4.70E-02 1.03E-02 2.50E-02 -3.52E-02 2.39E-02 -9.78E-03 2.44E-03 S13 -4.41E-02 1.63E-02 -2.57E-02 4.23E-02 -4.27E-02 2.84E-02 -1.30E-02 S14 -4.73E-02 1.18E-01 -1.74E-01 1.66E-01 -1.11E-01 5.37E-02 -1.93E-02 Surface A18 A20 A22 A24 A26 A28 A30 S3 -4.72E-05 -4.51E-05 1.11E-05 -1.31E-06 8.64E-08 -2.96E-09 3.85E-11 S4 6.19E+01 -4.28E+01 2.11E+01 -7.23E+00 1.64E+00 -2.20E-01 1.33E-02 S5 8.18E+01 -6.14E+01 3.31E+01 -1.25E+01 3.12E+00 -4.65E-01 3.11E-02 S6 1.26E+01 -6.23E+00 1.76E+00 -2.14E-01 0.00E+00 0.00E+00 0.00E+00 S9 -2.09E-02 5.27E-03 -7.68E-04 4.93E-05 0.00E+00 0.00E+00 0.00E+00 S10 3.27E-02 -6.80E-03 7.66E-04 -3.53E-05 0.00E+00 0.00E+00 0.00E+00 S11 3.27E-02 -6.80E-03 7.66E-04 -3.53E-05 0.00E+00 0.00E+00 0.00E+00 S12 -3.19E-04 6.47E-06 3.43E-06 -3.03E-07 0.00E+00 0.00E+00 0.00E+00 S13 4.26E-03 -9.99E-04 1.67E-04 -1.94E-05 1.49E-06 -6.78E-08 1.39E-09 S14 5.15E-03 -1.02E-03 1.46E-04 -1.48E-05 1.00E-06 -4.09E-08 7.54E-10

[0151] Embodiment 2

[0152] As Figure 3As shown, in this embodiment, the optical imaging lens includes a lens barrel P0 and a lens group and a spacer assembly accommodated within the lens barrel P0; the lens group includes, arranged in sequence along the optical axis from the object side to the image side: a first lens E1 with negative optical power, a second lens E2 with negative optical power, a third lens E3 with positive optical power, a fourth lens E4 with positive optical power, a fifth lens E5 with positive optical power, a sixth lens E6 with negative optical power, and a seventh lens E7 with positive optical power; wherein, the object side surface S1 and the image side surface S2 of the first lens E1 are a convex surface and a concave surface respectively; the object side surface S3 and the image side surface S4 of the second lens E2 are a convex surface and a concave surface respectively; the object side surface S5 and the image side surface S6 of the third lens E3 are a convex surface and a concave surface respectively; the object side surface S7 and the image side surface S8 of the fourth lens E4 are both convex surfaces; the object side surface S9 and the image side surface S10 of the fifth lens E5 are both convex surfaces; the object side surface S11 and the image side surface S12 of the sixth lens E6 are both concave surfaces; the object side surface S13 and the image side surface S14 of the seventh lens E7 are both convex surfaces, and the image side surface S10 of the fifth lens E5 is cemented to the object side surface S11 of the sixth lens E6.

[0153] The spacer assembly includes a second spacer element P2 placed between the second lens E2 and the third lens E3 and in contact with the image side surface of the second lens E2, a third spacer element P3 placed between the third lens E3 and the fourth lens E4 and in contact with the image side surface of the third lens E3, and a sixth spacer element P6 placed between the sixth lens E6 and the seventh lens E7 and in contact with the image side surface of the sixth lens E6.

[0154] In this embodiment, the spacer assembly further includes an auxiliary spacer element Px placed between the fourth lens E4 and the sixth lens E6 and in contact with the image side surface of the fourth lens E4 and the object side surface of the sixth lens.

[0155] It should be noted that, compared with the above-mentioned first embodiment, the optical imaging lens of this second embodiment has the same white object structure, that is, the basic optical parameter table of the optical imaging lens of this second embodiment is the same as Table 1, and the aspheric coefficient table is the same as Table 2. And the optical imaging lens of this second embodiment has a different black object structure from the optical imaging lens of the above-mentioned first embodiment, that is, the difference between this second embodiment and the above-mentioned first embodiment is that: the dimensional values of some structural parameters of the lens barrel and the spacer assembly in the optical imaging lens are different.

[0156] Specifically, the numerical values of the respective relevant structural parameters in the second embodiment and the first embodiment above are shown in Table 8 below. The multiple black object parameters specifically include: the distance L from the object side surface of the lens barrel P0 to the image side surface of the lens barrel; the distance EP02 between the object side surface of the lens barrel P0 and the object side surface of the second spacer element P2; the maximum thickness CP2 of the second spacer element P2; the maximum thickness CP6 of the sixth spacer element P6; the outer diameter D2s of the object side of the second spacer element P2; the inner diameter d2s of the object side of the second spacer element P2; the outer diameter D2m of the image side of the second spacer element; the inner diameter d2m of the image side of the second spacer element P2; the outer diameter D3m of the image side of the third spacer element; the inner diameter d3m of the image side of the third spacer element P3; the outer diameter D3s of the object side of the third spacer element P3; the inner diameter d3s of the object side of the third spacer element P3; the outer diameter D6s of the object side of the sixth spacer element P6; the inner diameter d6s of the object side of the sixth spacer element P6; the outer diameter D6m of the image side of the sixth spacer element; the outer diameter D0s of the object side of the lens barrel P0; the inner diameter d0s of the object side of the lens barrel P0. It can be understood that the unit of the numerical values shown for each parameter in Table 8 is millimeter (mm), and the schematic illustration of each parameter in the structural diagram of the optical imaging lens is as Figure 1 shown.

[0157] Embodiment Three

[0158] As Figure 4 shown, in this embodiment, the optical imaging lens includes a lens barrel P0 and a lens group and a spacer assembly accommodated within the lens barrel P0; the lens group includes, arranged in sequence from the object side to the image side along the optical axis: a first lens E1 with a negative optical power, a second lens E2 with a negative optical power, a third lens E3 with a positive optical power, a fourth lens E4 with a positive optical power, a fifth lens E5 with a positive optical power, a sixth lens E6 with a negative optical power, and a seventh lens E7 with a positive optical power; wherein, the object side surface S1 and the image side surface S2 of the first lens E1 are a convex surface and a concave surface respectively; the object side surface S3 and the image side surface S4 of the second lens E2 are a convex surface and a concave surface respectively; the object side surface S5 and the image side surface S6 of the third lens E3 are a convex surface and a concave surface respectively; the object side surface S7 and the image side surface S8 of the fourth lens E4 are both convex surfaces; the object side surface S9 and the image side surface S10 of the fifth lens E5 are both convex surfaces; the object side surface S11 and the image side surface S12 of the sixth lens E6 are both concave surfaces; the object side surface S13 and the image side surface S14 of the seventh lens E7 are both convex surfaces, and the image side surface S10 of the fifth lens E5 is cemented to the object side surface S11 of the sixth lens E6.

[0159] The spacer assembly includes a second spacer element P2 disposed between the second lens E2 and the third lens E3 and in contact with the image side surface of the second lens E2, a third spacer element P3 disposed between the third lens E3 and the fourth lens E4 and in contact with the image side surface of the third lens E3, and a sixth spacer element P6 disposed between the sixth lens E6 and the seventh lens E7 and in contact with the image side surface of the sixth lens E6.

[0160] In this embodiment, the spacer assembly further includes an auxiliary spacer element Px disposed between the fourth lens E4 and the sixth lens E6 and in contact with the image side surface of the fourth lens E4 and the object side surface of the sixth lens.

[0161] It should be noted that, compared with the first embodiment above, the optical imaging lens of this third embodiment has the same white object structure, that is, the basic optical parameter table of the optical imaging lens of this third embodiment is the same as Table 1, and the aspheric coefficient table is the same as Table 2. However, the optical imaging lens of this third embodiment and the optical imaging lens of the first embodiment above have different black object structures, that is, the difference between this third embodiment and the first embodiment above lies in that: the size values of some structural parameters of the lens barrel and the spacer assembly in the optical imaging lens are different. Specifically, the numerical values of each relevant structural parameter in this third embodiment are shown in Table 8 below. The specific descriptions of multiple black object parameters are the same as the relevant descriptions in the second embodiment above and will not be elaborated here.

[0162] After simulation tests: the axial chromatic aberration curves of the optical imaging lenses in the first embodiment, the second embodiment, and the third embodiment are as Figure 5A shown, which represents the degree of deviation of the focus points of light rays with different wavelengths after passing through the optical imaging lens; the astigmatism curves of the optical imaging lenses in the first embodiment, the second embodiment, and the third embodiment are as Figure 5B shown, which represents the curvature of the meridional image plane and the curvature of the sagittal image plane; the distortion curves of the optical imaging lenses in the first embodiment, the second embodiment, and the third embodiment are as Figure 5C shown, which represents the distortion conditions at different field angles; the longitudinal chromatic aberration curves of the optical imaging lenses in the first embodiment, the second embodiment, and the third embodiment are as Figure 5D shown, which represents the change in magnification of light rays with different wavelengths during imaging. According to Figure 5A 、 Figure 5B 、 Figure 5C and Figure 5D it can be seen that the optical imaging lenses in the first embodiment, the second embodiment, and the third embodiment can all achieve good imaging quality.

[0163] Embodiment Four

[0164] As Figure 6As shown, in this embodiment, the optical imaging lens includes a lens barrel P0 and a lens group and a spacer assembly accommodated within the lens barrel P0; the lens group includes, arranged in sequence from the object side to the image side along the optical axis: a first lens E1 with a negative optical power, a second lens E2 with a negative optical power, a third lens E3 with a positive optical power, a fourth lens E4 with a positive optical power, a fifth lens E5 with a positive optical power, a sixth lens E6 with a negative optical power, and a seventh lens E7 with a positive optical power; wherein, the object side surface S1 and the image side surface S2 of the first lens E1 are a convex surface and a concave surface respectively; the object side surface S3 and the image side surface S4 of the second lens E2 are a convex surface and a concave surface respectively; the object side surface S5 and the image side surface S6 of the third lens E3 are a convex surface and a concave surface respectively; the object side surface S7 and the image side surface S8 of the fourth lens E4 are both convex surfaces; the object side surface S9 and the image side surface S10 of the fifth lens E5 are both convex surfaces; the object side surface S11 and the image side surface S12 of the sixth lens E6 are both concave surfaces; the object side surface S13 and the image side surface S14 of the seventh lens E7 are both convex surfaces, and the image side surface S10 of the fifth lens E5 is cemented to the object side surface S11 of the sixth lens E6.

[0165] The spacer assembly includes a second spacer element P2 disposed between the second lens E2 and the third lens E3 and in contact with the image side surface of the second lens E2, a third spacer element P3 disposed between the third lens E3 and the fourth lens E4 and in contact with the image side surface of the third lens E3, and a sixth spacer element P6 disposed between the sixth lens E6 and the seventh lens E7 and in contact with the image side surface of the sixth lens E6.

[0166] In this embodiment, the spacer assembly further includes a third auxiliary spacer element P3b disposed between the third spacer element P3 and the fourth lens E4 and in contact with the image side surface of the third spacer element P3.

[0167] In addition, Table 3 shows the basic optical parameters of the optical imaging lens of Embodiment 4, wherein the units of the radius of curvature, thickness / distance, and effective radius are all millimeters (mm).

[0168] Table 3: Basic Optical Parameter Table of the Optical Imaging Lens of Embodiment 4

[0169] Surface number Surface type Radius of curvature Thickness / distance Refractive index Abbe number Conic constant OBJ Spherical surface Infinity Infinity S1 Spherical surface 8.4033 0.7241 1.7576 52.3374 S2 Spherical surface 2.9401 1.1101 S3 Aspherical surface 1.5220 0.7630 1.5459 56.1143 -0.9674 S4 Aspherical surface 0.7758 0.9453 -0.9514 S5 Aspherical surface 10.6975 0.5677 1.6776 19.2449 21.9774 S6 Aspherical surface 14.0492 0.8555 -58.0448 STO Spherical surface Infinity 0.1903 S7 Spherical surface 120.0000 1.2532 1.8192 49.5692 S8 Spherical surface -2.3218 0.1064 S9 Aspherical surface 8.6565 1.6812 1.5459 56.1143 -0.6042 S10 Aspherical surface -2.1752 0.0000 -5.5942 S11 Aspherical surface -2.1752 0.5704 1.6776 19.2449 -5.5942 S12 Aspherical surface 13.4484 0.4705 16.8690 S13 Aspherical surface 3.9981 1.4691 1.5459 56.1143 -0.5110 S14 Aspherical surface -2.7788 0.6756 -19.5967 S15 Spherical surface Infinity 0.2100 1.5183 64.1673 S16 Spherical surface Infinity 0.4000 S17 Spherical surface Infinity 0.0000

[0170] In this embodiment, except for the first lens E1 and the fourth lens E4, the object side and the image side of any lens in the lens group are aspherical surfaces, and the surface profiles of the aspherical lenses can be defined by the aspherical formula given in the first embodiment above. Table 4 below gives the higher-order coefficients A4, A6, A8, A10, A12, A14, A16, A18, A20, A22, A24, A26, A28, A30 for the aspherical surfaces S3 to S6 and S9 to S13 in the fourth embodiment.

[0171] Table 4: Aspherical Coefficient Table of the Optical Imaging Lens in the Fourth Embodiment

[0172] Surface A4 A6 A8 A10 A12 A14 A16 S3 3.01E-02 -5.06E-02 6.12E-02 -6.63E-02 3.92E-02 -1.31E-02 2.38E-03 S4 1.07E-01 3.15E-01 -3.31E+00 1.54E+01 -4.52E+01 8.87E+01 -1.22E+02 S5 9.59E-02 -6.58E-02 3.40E-01 -9.78E-01 1.78E+00 -1.70E+00 -1.50E-01 S6 1.10E-01 -6.74E-02 5.25E-01 -1.93E+00 5.05E+00 -9.05E+00 1.11E+01 S9 7.22E-05 -8.05E-03 1.59E-02 -1.57E-02 4.02E-03 8.49E-03 -1.14E-02 S10 -1.39E-01 1.18E-01 -2.67E-01 4.75E-01 -5.27E-01 3.64E-01 -1.58E-01 S11 -1.39E-01 1.18E-01 -2.67E-01 4.75E-01 -5.27E-01 3.64E-01 -1.58E-01 S12 -1.67E-02 -2.04E-02 3.25E-02 -2.36E-02 8.72E-03 1.66E-04 -1.84E-03 S13 1.35E-03 -4.34E-02 6.67E-02 -8.28E-02 7.72E-02 -5.20E-02 2.54E-02 S14 -1.89E-02 5.27E-03 3.45E-02 -6.89E-02 6.43E-02 -3.67E-02 1.39E-02 Surface A18 A20 A22 A24 A26 A28 A30 S3 -1.02E-04 -5.84E-05 1.61E-05 -2.11E-06 1.62E-07 -6.88E-09 1.27E-10 S4 1.19E+02 -8.39E+01 4.22E+01 -1.48E+01 3.42E+00 -4.71E-01 2.92E-02 S5 2.83E+00 -4.15E+00 3.32E+00 -1.66E+00 5.15E-01 -9.10E-02 7.02E-03 S6 -9.03E+00 4.66E+00 -1.38E+00 1.78E-01 0.00E+00 0.00E+00 0.00E+00 S9 6.79E-03 -2.26E-03 4.03E-04 -3.02E-05 0.00E+00 0.00E+00 0.00E+00 S10 4.11E-02 -5.65E-03 2.35E-04 1.66E-05 0.00E+00 0.00E+00 0.00E+00 S11 4.11E-02 -5.65E-03 2.35E-04 1.66E-05 0.00E+00 0.00E+00 0.00E+00 S12 9.14E-04 -2.24E-04 2.84E-05 -1.49E-06 0.00E+00 0.00E+00 0.00E+00 S13 -8.96E-03 2.29E-03 -4.16E-04 5.26E-05 -4.38E-06 2.16E-07 -4.78E-09 S14 -3.54E-03 5.97E-04 -6.12E-05 2.67E-06 1.35E-07 -2.18E-08 7.70E-10

[0173] Embodiment Five

[0174] As Figure 7 shown, in this embodiment, the optical imaging lens includes a lens barrel P0 and a lens group and a spacer assembly accommodated within the lens barrel P0; the lens group includes, arranged in order from the object side to the image side along the optical axis: a first lens E1 with a negative optical power, a second lens E2 with a negative optical power, a third lens E3 with a positive optical power, a fourth lens E4 with a positive optical power, a fifth lens E5 with a positive optical power, a sixth lens E6 with a negative optical power, and a seventh lens E7 with a positive optical power; wherein, the object side S1 and the image side S2 of the first lens E1 are convex and concave surfaces respectively; the object side S3 and the image side S4 of the second lens E2 are convex and concave surfaces respectively; the object side S5 and the image side S6 of the third lens E3 are convex and concave surfaces respectively; the object side S7 and the image side S8 of the fourth lens E4 are both convex surfaces; the object side S9 and the image side S10 of the fifth lens E5 are both convex surfaces; the object side S11 and the image side S12 of the sixth lens E6 are both concave surfaces; the object side S13 and the image side S14 of the seventh lens E7 are both convex surfaces, and the image side S10 of the fifth lens E5 is cemented to the object side S11 of the sixth lens E6.

[0175] The spacer assembly includes a second spacer element P2 placed between the second lens E2 and the third lens E3 and in contact with the image side of the second lens E2, a third spacer element P3 placed between the third lens E3 and the fourth lens E4 and in contact with the image side of the third lens E3, and a sixth spacer element P6 placed between the sixth lens E6 and the seventh lens E7 and in contact with the image side of the sixth lens E6.

[0176] In this embodiment, the spacer assembly further includes a third auxiliary spacer element P3b placed between the third spacer element P3 and the fourth lens E4 and in contact with the image side of the third spacer element P3.

[0177] It should be noted that, compared with the fourth embodiment above, the optical imaging lens of this fifth embodiment has the same white object structure, that is, the basic optical parameter table of the optical imaging lens of this fifth embodiment is the same as Table 3, and the aspherical coefficient table is the same as Table 4. However, the optical imaging lens of this fifth embodiment and the optical imaging lens of the fourth embodiment above have different black object structures, that is, the difference between this fifth embodiment and the fourth embodiment above lies in that: the dimensional values of some structural parameters of the lens barrel and the spacer assembly in the optical imaging lens are different. Specifically, the numerical values of each relevant structural parameter in this fifth embodiment are shown in Table 8 below. The specific descriptions of multiple black object parameters are the same as the relevant descriptions in the second embodiment above and will not be elaborated here.

[0178] Embodiment Six

[0179] As Figure 8 shown, in this embodiment, the optical imaging lens includes a lens barrel P0 and a lens group and a spacer assembly accommodated within the lens barrel P0; the lens group includes, arranged in order from the object side to the image side along the optical axis: a first lens E1 with negative optical power, a second lens E2 with negative optical power, a third lens E3 with positive optical power, a fourth lens E4 with positive optical power, a fifth lens E5 with positive optical power, a sixth lens E6 with negative optical power, and a seventh lens E7 with positive optical power; wherein, the object side surface S1 and the image side surface S2 of the first lens E1 are a convex surface and a concave surface respectively; the object side surface S3 and the image side surface S4 of the second lens E2 are a convex surface and a concave surface respectively; the object side surface S5 and the image side surface S6 of the third lens E3 are a convex surface and a concave surface respectively; the object side surface S7 and the image side surface S8 of the fourth lens E4 are both convex surfaces; the object side surface S9 and the image side surface S10 of the fifth lens E5 are both convex surfaces; the object side surface S11 and the image side surface S12 of the sixth lens E6 are both concave surfaces; the object side surface S13 and the image side surface S14 of the seventh lens E7 are both convex surfaces, and the image side surface S10 of the fifth lens E5 is glued to the object side surface S11 of the sixth lens E6.

[0180] The spacer assembly includes a second spacer element P2 disposed between the second lens E2 and the third lens E3 and in contact with the image side surface of the second lens E2, a third spacer element P3 disposed between the third lens E3 and the fourth lens E4 and in contact with the image side surface of the third lens E3, and a sixth spacer element P6 disposed between the sixth lens E6 and the seventh lens E7 and in contact with the image side surface of the sixth lens E6.

[0181] In this embodiment, the spacer assembly further includes an auxiliary spacer element Px disposed between the fourth lens E4 and the sixth lens E6 and in contact with the image side surface of the fourth lens E4 and the object side surface of the sixth lens.

[0182] It should be noted that, compared with the fourth embodiment above, the optical imaging lens of this sixth embodiment has the same white object structure, that is, the basic optical parameter table of the optical imaging lens of this sixth embodiment is the same as Table 3, and the aspheric coefficient table is the same as Table 4. However, the optical imaging lens of this sixth embodiment and the optical imaging lens of the fourth embodiment above have different black object structures, that is, the difference between this sixth embodiment and the fourth embodiment above lies in that: the dimensional values of some structural parameters of the lens barrel and the spacer assembly in the optical imaging lens are different. Specifically, the numerical values of each relevant structural parameter in this sixth embodiment are shown in Table 8 below. The specific descriptions of multiple black object parameters are the same as the relevant descriptions in the second embodiment above and will not be elaborated here.

[0183] After simulation tests: the axial chromatic aberration curves of the optical imaging lenses in the fourth embodiment, the fifth embodiment, and the sixth embodiment are as Figure 9A shown, which represents the degree of deviation of the focus points of light rays with different wavelengths after passing through the optical imaging lens; the astigmatism curves of the optical imaging lenses in the fourth embodiment, the fifth embodiment, and the sixth embodiment are as Figure 9B shown, which represents the curvature of the meridional image plane and the curvature of the sagittal image plane; the distortion curves of the optical imaging lenses in the fourth embodiment, the fifth embodiment, and the sixth embodiment are as Figure 9C shown, which represents the distortion conditions at different field angles; the lateral chromatic aberration curves of the optical imaging lenses in the fourth embodiment, the fifth embodiment, and the sixth embodiment are as Figure 9D shown, which represents the change in magnification of light rays with different wavelengths during imaging. According to Figure 9A , Figure 9B , Figure 9C and Figure 9D it can be seen that the optical imaging lenses in the fourth embodiment, the fifth embodiment, and the sixth embodiment can all achieve good imaging quality.

[0184] Embodiment Seven

[0185] As Figure 10As shown, in this embodiment, the optical imaging lens includes a lens barrel P0 and a lens group and a spacer assembly accommodated within the lens barrel P0; the lens group includes, arranged in sequence along the optical axis from the object side to the image side: a first lens E1 with negative optical power, a second lens E2 with negative optical power, a third lens E3 with positive optical power, a fourth lens E4 with positive optical power, a fifth lens E5 with positive optical power, a sixth lens E6 with negative optical power, and a seventh lens E7 with positive optical power; wherein, the object side surface S1 and the image side surface S2 of the first lens E1 are a convex surface and a concave surface respectively; the object side surface S3 and the image side surface S4 of the second lens E2 are a convex surface and a concave surface respectively; the object side surface S5 and the image side surface S6 of the third lens E3 are a convex surface and a concave surface respectively; the object side surface S7 and the image side surface S8 of the fourth lens E4 are a concave surface and a convex surface respectively; the object side surface S9 and the image side surface S10 of the fifth lens E5 are both convex surfaces; the object side surface S11 and the image side surface S12 of the sixth lens E6 are both concave surfaces; the object side surface S13 and the image side surface S14 of the seventh lens E7 are both convex surfaces, and the image side surface S10 of the fifth lens E5 is cemented to the object side surface S11 of the sixth lens E6.

[0186] The spacer assembly includes a second spacer element P2 placed between the second lens E2 and the third lens E3 and in contact with the image side surface of the second lens E2, a third spacer element P3 placed between the third lens E3 and the fourth lens E4 and in contact with the image side surface of the third lens E3, and a sixth spacer element P6 placed between the sixth lens E6 and the seventh lens E7 and in contact with the image side surface of the sixth lens E6.

[0187] In this embodiment, the spacer assembly further includes a fourth spacer element P4 placed between the fourth lens E4 and the fifth lens E5 and in contact with the image side surface of the fourth lens E4; and a fourth auxiliary spacer element P4b placed between the fourth spacer element P4 and the fifth lens E5 and in contact with the image side surface of the fourth spacer element P4.

[0188] In addition, Table 5 shows the basic optical parameters of the optical imaging lens of Embodiment VII, wherein the units of the radius of curvature, thickness / distance, and effective radius are all millimeters (mm).

[0189] Table 5: Basic Optical Parameter Table of the Optical Imaging Lens of Embodiment VII

[0190]

[0191]

[0192] In this embodiment, except for the first lens E1 and the fourth lens E4, the object side and the image side of any one lens in the lens group are aspherical surfaces, and the surface profiles of the aspherical lenses can be defined by the aspherical formula given in the first embodiment above. Table 4 below gives the high-order coefficients A4, A6, A8, A10, A12, A14, A16, A18, A20, A22, A24, A26, A28, A30 for the aspherical surfaces S3 to S6 and S9 to S13 in the fourth embodiment.

[0193] Table 6: Aspherical Coefficient Table of the Optical Imaging Lens in the Seventh Embodiment

[0194] Surface A4 A6 A8 A10 A12 A14 A16 S3 3.18E-02 -4.91E-02 4.72E-02 -4.53E-02 2.45E-02 -6.75E-03 4.54E-04 S4 9.08E-02 3.71E-01 -2.68E+00 1.01E+01 -2.56E+01 4.54E+01 -5.75E+01 S5 8.29E-02 2.02E-01 -1.46E+00 6.38E+00 -1.84E+01 3.68E+01 -5.27E+01 S6 1.10E-01 -8.54E-02 5.71E-01 -2.00E+00 4.78E+00 -7.66E+00 8.31E+00 S9 9.88E-04 -1.97E-02 6.94E-02 -1.50E-01 2.12E-01 -1.99E-01 1.25E-01 S10 -2.10E-01 3.14E-01 -4.34E-01 5.18E-01 -4.92E-01 3.36E-01 -1.57E-01 S11 -2.10E-01 3.14E-01 -4.34E-01 5.18E-01 -4.92E-01 3.36E-01 -1.57E-01 S12 -6.76E-02 6.66E-02 -6.22E-02 5.41E-02 -3.87E-02 2.08E-02 -7.94E-03 S13 -5.07E-02 2.00E-02 -9.17E-03 1.64E-03 3.61E-03 -4.56E-03 2.89E-03 S14 -8.15E-03 3.97E-02 -5.67E-02 4.50E-02 -2.47E-02 1.06E-02 -3.77E-03 Surface A18 A20 A22 A24 A26 A28 A30 S3 3.27E-04 -1.31E-04 2.53E-05 -2.98E-06 2.18E-07 -9.12E-09 1.68E-10 S4 5.31E+01 -3.57E+01 1.74E+01 -5.96E+00 1.36E+00 -1.87E-01 1.16E-02 S5 5.47E+01 -4.12E+01 2.23E+01 -8.40E+00 2.10E+00 -3.11E-01 2.08E-02 S6 -6.02E+00 2.78E+00 -7.43E-01 8.80E-02 0.00E+00 0.00E+00 0.00E+00 S9 -5.16E-02 1.35E-02 -2.04E-03 1.34E-04 0.00E+00 0.00E+00 0.00E+00 S10 -2.10E-01 3.14E-01 -4.34E-01 5.18E-01 -4.92E-01 3.36E-01 -1.57E-01 S11 4.94E-02 -9.88E-03 1.14E-03 -5.84E-05 0.00E+00 0.00E+00 0.00E+00 S12 2.09E-03 -3.59E-04 3.61E-05 -1.61E-06 0.00E+00 0.00E+00 0.00E+00 S13 -1.18E-03 3.31E-04 -6.43E-05 8.56E-06 -7.45E-07 3.82E-08 -8.76E-10 S14 1.10E-03 -2.49E-04 4.20E-05 -4.99E-06 3.90E-07 -1.80E-08 3.71E-10

[0195] Embodiment Eight

[0196] As Figure 11 shown, in this embodiment, the optical imaging lens includes a lens barrel P0 and a lens group and a spacer assembly accommodated within the lens barrel P0; the lens group includes, arranged in sequence along the optical axis from the object side to the image side: a first lens E1 with negative optical power, a second lens E2 with negative optical power, a third lens E3 with positive optical power, a fourth lens E4 with positive optical power, a fifth lens E5 with positive optical power, a sixth lens E6 with negative optical power, and a seventh lens E7 with positive optical power; wherein, the object side S1 and the image side S2 of the first lens E1 are a convex surface and a concave surface respectively; the object side S3 and the image side S4 of the second lens E2 are a convex surface and a concave surface respectively; the object side S5 and the image side S6 of the third lens E3 are a convex surface and a concave surface respectively; the object side S7 and the image side S8 of the fourth lens E4 are a concave surface and a convex surface respectively; the object side S9 and the image side S10 of the fifth lens E5 are both convex surfaces; the object side S11 and the image side S12 of the sixth lens E6 are both concave surfaces; the object side S13 and the image side S14 of the seventh lens E7 are both convex surfaces, and the image side S10 of the fifth lens E5 is cemented to the object side S11 of the sixth lens E6.

[0197] The spacer assembly includes a second spacer element P2 placed between the second lens E2 and the third lens E3 and in contact with the image side of the second lens E2, a third spacer element P3 placed between the third lens E3 and the fourth lens E4 and in contact with the image side of the third lens E3, and a sixth spacer element P6 placed between the sixth lens E6 and the seventh lens E7 and in contact with the image side of the sixth lens E6.

[0198] In this embodiment, the spacer assembly further includes a fourth spacer element P4 placed between the fourth lens E4 and the fifth lens E5 and in contact with the image side of the fourth lens E4.

[0199] It should be noted that, compared with the seventh embodiment above, the optical imaging lens of this eighth embodiment has the same white object structure, that is, the basic optical parameter table of the optical imaging lens of this eighth embodiment is the same as Table 5, and the aspherical coefficient table is the same as Table 6. However, the optical imaging lens of this eighth embodiment and the optical imaging lens of the seventh embodiment above have different black object structures, that is, the difference between this eighth embodiment and the seventh embodiment above lies in that: the dimensional values of some structural parameters of the lens barrel and the spacer assembly in the optical imaging lens are different. Specifically, the values of each relevant structural parameter in this eighth embodiment are shown in Table 8 below, and the specific descriptions of multiple black object parameters are the same as the relevant descriptions in the second embodiment above, which will not be elaborated here.

[0200] Embodiment Nine

[0201] As Figure 12 shown, in this embodiment, the optical imaging lens includes a lens barrel P0 and a lens group and a spacer assembly accommodated within the lens barrel P0; the lens group includes, arranged in sequence from the object side to the image side along the optical axis: a first lens E1 with a negative optical power, a second lens E2 with a negative optical power, a third lens E3 with a positive optical power, a fourth lens E4 with a positive optical power, a fifth lens E5 with a positive optical power, a sixth lens E6 with a negative optical power, and a seventh lens E7 with a positive optical power; wherein, the object side surface S1 and the image side surface S2 of the first lens E1 are a convex surface and a concave surface respectively; the object side surface S3 and the image side surface S4 of the second lens E2 are a convex surface and a concave surface respectively; the object side surface S5 and the image side surface S6 of the third lens E3 are a convex surface and a concave surface respectively; the object side surface S7 and the image side surface S8 of the fourth lens E4 are a concave surface and a convex surface respectively; the object side surface S9 and the image side surface S10 of the fifth lens E5 are both convex surfaces; the object side surface S11 and the image side surface S12 of the sixth lens E6 are both concave surfaces; the object side surface S13 and the image side surface S14 of the seventh lens E7 are both convex surfaces, and the image side surface S10 of the fifth lens E5 is glued to the object side surface S11 of the sixth lens E6.

[0202] The spacer assembly includes a second spacer element P2 placed between the second lens E2 and the third lens E3 and in contact with the image side surface of the second lens E2, a third spacer element P3 placed between the third lens E3 and the fourth lens E4 and in contact with the image side surface of the third lens E3, and a sixth spacer element P6 placed between the sixth lens E6 and the seventh lens E7 and in contact with the image side surface of the sixth lens E6.

[0203] It should be noted that, compared with the seventh embodiment above, the optical imaging lens of this ninth embodiment has the same white object structure, that is, the basic optical parameter table of the optical imaging lens of this ninth embodiment is the same as Table 5, and the aspheric coefficient table is the same as Table 6. However, the optical imaging lens of this ninth embodiment and the optical imaging lens of the seventh embodiment above have different black object structures, that is, the difference between this ninth embodiment and the seventh embodiment above lies in: the dimensional values of some structural parameters of the lens barrel and the spacer assembly in the optical imaging lens are different. Specifically, the numerical values of each relevant structural parameter in this ninth embodiment are shown in Table 8 below, and the specific descriptions of multiple black object parameters are the same as the relevant descriptions in the second embodiment above, which will not be elaborated here.

[0204] After simulation tests: the axial chromatic aberration curves of the optical imaging lenses in the seventh embodiment, the eighth embodiment, and the ninth embodiment are as Figure 13A shown, which represents the deviation degree of the convergence points of light rays with different wavelengths after passing through the optical imaging lens; the astigmatism curves of the optical imaging lenses in the seventh embodiment, the eighth embodiment, and the ninth embodiment are as Figure 13B shown, which represents the curvature degree of the meridional image plane and the curvature degree of the sagittal image plane; the distortion curves of the optical imaging lenses in the seventh embodiment, the eighth embodiment, and the ninth embodiment are as Figure 13C shown, which represents the distortion conditions at different field angles; the lateral chromatic aberration curves of the optical imaging lenses in the seventh embodiment, the eighth embodiment, and the ninth embodiment are as Figure shown, which represents the change in magnification of light rays with different wavelengths during imaging. According to ​ , ​ , ​ and ​ , it can be seen that the optical imaging lenses in the seventh embodiment, the eighth embodiment, and the ninth embodiment can all achieve good imaging quality.

[0205] In summary, among the first to ninth embodiments, the FOV of the maximum field angle of the optical imaging lens, the central distance TD along the optical axis direction from the object side of the first lens E1 to the image side of the seventh lens E7, the effective focal length f of the optical imaging lens, and the effective focal lengths f1 to f7 of the first lens E1 to the seventh lens E7 in the optical imaging lens are respectively shown in Table 7 below.

[0206] Table 7: System optical parameter table of the optical imaging lens

[0207]

[0208]

[0209] In addition, the black object structure parameters of the optical imaging lenses in the first to ninth embodiments are specifically shown in Table 8 below.

[0210] Table 8: Black object structure parameter table of the optical imaging lens

[0211] ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ 8.39 8.57 8.63 8.10 8.22 8.29 9.36 9.51 9.66 ​ 1.34 1.42 1.48 1.53 1.58 1.68 1.78 1.83 1.90 ​ 0.02 0.03 0.02 0.02 0.02 0.01 0.02 0.02 0.01 ​ 1.12 1.23 1.23 0.88 0.95 0.86 1.25 1.27 1.25 ​ 7.28 7.03 7.11 7.11 7.24 7.03 7.63 7.63 7.80 ​ 2.97 2.91 2.99 2.94 2.94 2.93 2.91 2.91 2.92 ​ 7.28 7.03 7.11 7.11 7.24 7.03 7.63 7.63 7.80 ​ 2.97 2.91 2.99 2.94 2.94 2.93 2.91 2.91 2.92 ​ 6.62 6.38 6.46 6.41 6.54 6.32 7.24 5.81 5.71 ​ 2.03 1.95 2.03 2.02 2.06 2.03 2.24 3.08 2.96 ​ 6.62 6.38 6.46 6.41 6.54 6.32 7.24 5.80 5.71 ​ 2.03 1.95 2.03 2.02 2.06 2.03 2.24 3.08 2.96 ​ 4.44 4.44 4.62 4.59 5.22 4.64 4.27 4.18 4.24 ​ 5.5 5.52 5.35 5.44 5.81 5.67 4.95 4.91 4.93 ​ 5.77 5.80 5.79 5.77 5.77 5.41 5.91 5.86 5.92 ​ 12.38 12.47 12.54 12.56 12.73 12.85 12.39 12.62 12.49 ​ 11.87 11.82 11.90 11.79 12.27 12.05 11.57 11.61 11.64

[0212] In summary, the optical imaging lenses in Embodiments 1 to 9 satisfy the relational expressions shown in Table 9, as specifically shown in Table 9.

[0213] Table 9: Table of Relational Expressions Satisfied by the Optical Imaging Lens

[0214] ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ -6.16 -6.16 -6.16 -6.15 -6.15 -6.15 -5.61 -5.61 -5.61 ​ 5.80 5.54 5.54 5.81 6.00 5.72 7.29 7.29 7.53 ​ 1.45 1.54 1.60 1.64 1.69 1.79 2.32 2.38 2.46 ​ 4.58 4.38 4.38 4.41 4.55 4.34 6.07 6.07 6.28 ​ 2.59 3.88 2.59 2.58 2.58 1.29 2.22 2.22 1.11 ​ 1.46 1.49 1.47 1.46 1.43 1.44 1.30 0.94 0.99 ​ 0.75 0.77 0.77 0.71 0.72 0.73 0.84 0.86 0.87 ​ 2.09 1.91 1.91 2.56 2.37 2.62 1.94 1.91 1.94 ​ 4.24 4.33 4.36 3.66 3.72 3.75 4.65 4.73 4.80 ​ -2.13 -2.09 -3.10 -3.20 -4.61 -2.64 -3.49 -3.25 -3.43 ​ 22.06 17.31 17.58 14.78 24.74 14.23 14.24 11.56 13.74 ​ 1.33 1.32 1.32 2.33 2.33 2.49 1.41 1.43 1.41 ​ 3.53 3.41 3.41 3.50 3.57 3.42 4.09 2.24 2.25 ​ 0.41 0.41 0.42 0.41 0.41 0.42 0.38 0.38 0.37 ​ 4.37 4.53 4.53 4.58 4.49 4.69 3.98 7.32 7.24 ​ 2.71 2.12 2.16 1.81 3.02 1.74 1.68 1.37 1.62

[0215] The technical features of the above embodiments can be combined arbitrarily. For the sake of brevity of description, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, it should be considered as within the scope described in this specification.

[0216] ​

Claims

1. Optical imaging lens, characterized in that, Comprising: A lens barrel, a lens group and a spacer assembly accommodated within the lens barrel; the lens group includes, arranged in sequence from the object side to the image side along the optical axis: a first lens with a negative focal power, a second lens with a negative focal power, a third lens with a positive focal power, a fourth lens with a positive focal power, a fifth lens with a positive focal power, a sixth lens with a negative focal power, and a seventh lens with a positive focal power; wherein, the object side surface and the image side surface of the first lens are a convex surface and a concave surface respectively; the object side surface and the image side surface of the second lens are a convex surface and a concave surface respectively; the object side surface and the image side surface of the third lens are a convex surface and a concave surface respectively; the image side surface of the fourth lens is a convex surface; the object side surface and the image side surface of the fifth lens are both convex surfaces; the object side surface and the image side surface of the sixth lens are both concave surfaces; the object side surface and the image side surface of the seventh lens are both convex surfaces, and the image side surface of the fifth lens is cemented to the object side surface of the sixth lens; the spacer assembly includes a second spacer element placed between the second lens and the third lens and in contact with the image side surface of the second lens, a third spacer element placed on the image side of the third lens and in contact with the image side surface of the third lens, and a sixth spacer element placed between the sixth lens and the seventh lens and in contact with the image side surface of the sixth lens; the optical imaging lens satisfies: -6.20mm < f2 * tan(FOV / 4) < -5.60mm; and 5.50mm < (D2s - d2s) * f1 / f2 < 7.55mm; Wherein, f1 is the effective focal length of the first lens, f2 is the effective focal length of the second lens, f is the effective focal length of the optical imaging lens, FOV is the maximum field of view angle of the optical imaging lens, D2s is the object side outer diameter of the second spacer element, and d2s is the object side inner diameter of the second spacer element.

2. The optical imaging lens according to claim 1, wherein The optical imaging lens satisfies: 1.45 ≤ (EP02 + CP2) / T23 < 2.50; Wherein, EP02 is the distance between the object side surface of the lens barrel and the object side surface of the second spacer element, CP2 is the maximum thickness of the second spacer element, and T23 is the air gap distance between the centers of the second lens and the third lens in the optical axis direction.

3. The optical imaging lens according to claim 1, wherein The optical imaging lens satisfies: 4.30 < (D2s - d2s) / T23 < 6.30; Wherein, T23 is the air gap distance between the centers of the second lens and the third lens in the optical axis direction, D2s is the object side outer diameter of the second spacer element, and d2s is the object side inner diameter of the second spacer element.

4. The optical imaging lens according to claim 1, characterized in that, The optical imaging lens satisfies: 1.10 < CP2 / R4 * 100 < 3.90; Wherein, CP2 is the maximum thickness of the second spacer element, and R4 is the curvature radius of the image side surface of the second lens.

5. The optical imaging lens according to claim 1, wherein The optical imaging lens satisfies: 0.90 < d2s / d3s < 1.50; Wherein, d2s is the object side inner diameter of the second spacer element, and d3s is the object side inner diameter of the third spacer element.

6. The optical imaging lens according to claim 1, wherein The optical imaging lens satisfies: 0.70 < L / (CT1 + T12) < 0.90; Wherein, L is the distance from the object side surface of the lens barrel to the image side surface of the lens barrel, CT1 is the central thickness of the first lens on the optical axis, and T12 is the air gap distance between the centers of the first lens and the second lens in the optical axis direction.

7. The optical imaging lens according to claim 1, characterized in that, The optical imaging lens satisfies: 1.90 < (CT5 + CT6) / CP6 < 2.65; Wherein, CT5 is the central thickness of the fifth lens on the optical axis, CT6 is the central thickness of the sixth lens on the optical axis, and CP6 is the maximum thickness of the sixth spacer element.

8. The optical imaging lens according to claim 1, characterized in that, The optical imaging lens satisfies: 3.65mm < L / f7 * CT7 ≤ 4.80mm; Wherein, L is the distance from the object side surface of the lens barrel to the image side surface of the lens barrel, f7 is the effective focal length of the seventh lens, and CT7 is the central thickness of the seventh lens on the optical axis.

9. The optical imaging lens according to claim 1, characterized in that, The optical imaging lens satisfies: -4.65 < f6 / (D6s - d6s) < -2.05; Wherein, f6 is the effective focal length of the sixth lens, D6s is the object side outer diameter of the sixth spacer element, and d6s is the object side inner diameter of the sixth spacer element.

10. The optical imaging lens according to claim 1, wherein, The optical imaging lens satisfies: 11.55 < TD / (D0s - d0s) < 24.75; Wherein, TD is the central distance along the optical axis from the object side surface of the first lens to the image side surface of the seventh lens, D0s is the object side outer diameter of the lens barrel, and d0s is the object side inner diameter of the lens barrel.

11. The optical imaging lens according to claim 1, characterized in that, The optical imaging lens satisfies: 1.30 < R12 / D6m < 2.50; Wherein, R12 is the curvature radius of the image side surface of the sixth lens, and D6m is the image side outer diameter of the sixth spacer element.

12. The optical imaging lens according to claim 1, wherein, The optical imaging lens satisfies: 2.20 < (D3m - d3m) / CT4 < 4.10; Wherein, D3m is the image side outer diameter of the third spacer element, d3m is the image side inner diameter of the third spacer element, and CT4 is the central thickness of the fourth lens on the optical axis.

13. The optical imaging lens according to claim 1, wherein The optical imaging lens satisfies: 2.35 < D2m / d2m < 2.70; Wherein, d2m is the image side inner diameter of the second spacer element, and D2m is the image side outer diameter of the second spacer element.

14. The optical imaging lens according to claim 1, wherein The optical imaging lens satisfies: 3.95 < T34 * V3 / (D3s - d3s) < 7.35; Wherein, T34 is the air gap distance between the centers of the third lens and the fourth lens in the optical axis direction, V3 is the Abbe number of the material of the third lens, D3s is the object side outer diameter of the third spacer element, and d3s is the object side inner diameter of the third spacer element.

15. The optical imaging lens according to claim 2, wherein The optical imaging lens satisfies: 1.35 < f / (D0s - d0s) < 3.05; Wherein, f is the effective focal length of the optical imaging lens, D0s is the object side outer diameter of the lens barrel, and d0s is the object side inner diameter of the lens barrel.

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