Optical imaging lens

Abstract

An optical imaging lens, the optical imaging lens comprises a lens barrel, seven lenses and a plurality of spacers, wherein the seven lenses include a first lens with negative optical power, a second lens with positive optical power, a third lens with positive optical power, a fourth lens with positive optical power, a fifth lens with negative optical power, a sixth lens with positive optical power, and a seventh lens with negative optical power, and an air space is provided between every two adjacent lenses among the first lens to the seventh lens; the plurality of spacers include a fourth spacer and a fifth spacer; the following relationships are satisfied: 1<EP45 / CT5<4; 1<R8 / R9<4; and 0<d4s / (f4-f5)<0.5. The present invention solves the problem of severe internal reflection stray light existing in the optical imaging lens with seven lenses in the prior art.

Description

[Technical Field]

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

[0002] With the continuous advancement of technology and the increasing demands of consumers, mobile phones have become an indispensable part of people's daily lives. Mobile phones perform multiple functions, and the rapid development of mobile phone photography technology, in particular, has led to increasingly higher performance requirements for the optical imaging lenses on mobile phones. High performance and high quality of optical imaging lenses have become the focus of competition among major manufacturers. Consumers not only pursue clarity and realistic color reproduction but also hope that optical imaging lenses can capture a wider field of view and richer details. Currently, many designs use seven-lens optical imaging lenses to meet market demands. However, seven-lens optical imaging lenses are prone to internal reflection problems, which generate stray light and thus affect the imaging quality of the optical imaging lens.

[0003] In other words, the existing seven-lens optical imaging lens has a serious problem of internal reflection stray light. [Summary of the Invention]

[0004] The main objective of this invention is to provide an optical imaging lens to solve the problem of severe internal reflection stray light in existing seven-lens optical imaging lenses.

[0005] To achieve the above objective, according to one aspect of the present invention, an optical imaging lens is provided, comprising a lens barrel, seven lenses, and a plurality of spacers. The seven lenses and the plurality of spacers are all disposed within the lens barrel. The seven lenses, from the object side to the image side, sequentially include a first lens with negative optical power, a second lens with positive optical power, a third lens with positive optical power, a fourth lens with positive optical power, a fifth lens with negative optical power, a sixth lens with positive optical power, and a seventh lens with negative optical power. An air gap exists between adjacent lenses from the first to the seventh lens. The plurality of spacers includes at least a fourth spacer and a fifth spacer, with the fourth spacer located at the fourth lens. The fifth spacer is located between the fifth and sixth lenses and abuts against the image-side portion of the fifth lens; the distance EP45 between the image-side and object-side of the fourth spacer and the fifth spacer on the optical axis satisfies the following relationship between the center thickness CT5 of the fifth lens and the image-side of the fifth lens: 1 < EP45 / CT5 < 4; the radius of curvature R8 of the image-side of the fourth lens and the radius of curvature R9 of the object-side of the fifth lens satisfy the following relationship: 1 < R8 / R9 < 4; the inner diameter d4s of the object-side of the fourth spacer, the effective focal length f4 of the fourth lens, and the effective focal length f5 of the fifth lens satisfy the following relationship: 0 < d4s / (f4-f5) < 0.5.

[0006] According to another aspect of the present invention, an optical imaging lens is also provided, comprising a lens barrel, seven lenses, and a plurality of spacers. The seven lenses and the plurality of spacers are all disposed within the lens barrel. The seven lenses, from the object side to the image side, sequentially include a first lens with negative optical power, a second lens with positive optical power, a third lens with positive optical power, a fourth lens with positive optical power, a fifth lens with negative optical power, a sixth lens with positive optical power, and a seventh lens with negative optical power. An air gap exists between adjacent lenses from the first to the seventh lens. The plurality of spacers includes at least a fourth spacer and a fifth spacer, with the fourth spacer located between the fourth and fifth lenses and adjacent to the image side of the fourth lens. Partial contact, the fifth spacer is located between the fifth and sixth lenses and partially contacts the image side of the fifth lens; the distance EP45 between the image side of the fourth spacer and the object side of the fifth spacer on the optical axis satisfies the following relationship with the center thickness CT5 of the fifth lens: 1 < EP45 / CT5 < 4; the radius of curvature R8 of the image side of the fourth lens satisfies the following relationship with the radius of curvature R9 of the object side of the fifth lens: 1 < R8 / R9 < 4; the inner diameter d5s of the object side of the fifth spacer, the inner diameter d4m of the image side of the fourth spacer, the radius of curvature R9 of the object side of the fifth lens, and the radius of curvature R10 of the image side of the fifth lens satisfy the following relationship: 0 < d5s / R10 - d4m / R9 < 1.5.

[0007] Further, the plurality of spacers also includes a first spacer and a second spacer. The first spacer is located between the first lens and the second lens and abuts against the image-side portion of the first lens. The second spacer is located between the second lens and the third lens and abuts against the image-side portion of the second lens. The inner diameter d1s of the object-side surface of the first spacer, the inner diameter d2s of the object-side surface of the second spacer and the effective focal length f2 of the second lens satisfy the following: 2 < f2 / (d1s-d2s) < 10.

[0008] Further, the plurality of spacers also includes a first spacer, which is located between the first lens and the second lens and abuts against the image side of the first lens. The inner diameter d1m of the image side of the first spacer, the outer diameter D1m of the image side of the first spacer, and the distance T12 on the optical axis from the image side of the first lens to the object side of the second lens satisfy the following: 2 < (D1m - d1m) / T12 < 6.

[0009] Further, the plurality of spacers also includes a second spacer, which is located between the second lens and the third lens and abuts against the image-side portion of the second lens. The inner diameter d2s of the object-side surface of the second spacer, the inner diameter d2m of the image-side surface of the second spacer, the radius of curvature R4 of the image-side surface of the second lens and the radius of curvature R5 of the object-side surface of the third lens satisfy the following: -0.5 < d2s / R4 - d2m / R5 < 1.

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

[0011] Further, the plurality of spacers also includes a second spacer, which is located between the second lens and the third lens and abuts against the image side of the second lens. The inner diameter d2m of the image side of the second spacer, the effective diameter DT31 of the central light-transmitting area of ​​the object side of the third lens, and the effective diameter DT22 of the central light-transmitting area of ​​the image side of the second lens satisfy the following: -18 < d2m / (DT22-DT31) < 8.

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

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

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

[0015] Further, the inner diameter d5s of the object side of the fifth spacer, the inner diameter d5m of the image side of the fifth spacer, the effective diameter DT52 of the central light-transmitting area of ​​the image side of the fifth lens, and the effective diameter DT61 of the central light-transmitting area of ​​the object side of the sixth lens satisfy the following: 0 < d5s / DT52 - d5m / DT61 ​​< 0.5.

[0016] Further, the plurality of spacers also includes a sixth spacer, which is located between the sixth lens and the seventh lens and abuts against the image side of the sixth lens. The inner diameter d6s of the object side of the sixth spacer, the center thickness CT6 of the sixth lens and the center thickness CT7 of the seventh lens satisfy the following: 2 < d6s / (CT6+CT7) < 5.

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

[0018] Applying the technical solution of the present invention, the optical imaging lens includes a lens barrel, seven lenses, and multiple spacers. The seven lenses and multiple spacers are all disposed within the lens barrel. The seven lenses, from the object side to the image side, sequentially include a first lens with negative optical power, a second lens with positive optical power, a third lens with positive optical power, a fourth lens with positive optical power, a fifth lens with negative optical power, a sixth lens with positive optical power, and a seventh lens with negative optical power. An air gap exists between adjacent lenses from the first to the seventh lens. The multiple spacers include at least a fourth spacer and a fifth spacer, with the fourth spacer located between the fourth and fifth lenses. The fifth spacer is located between the fifth and sixth lenses and abuts against the image-side surface of the fifth lens; the distance EP45 between the image-side surface of the fourth spacer and the object-side surface of the fifth spacer on the optical axis satisfies the following relationship between the center thickness CT5 of the fifth lens and the image-side surface of the fifth lens: 1 < EP45 / CT5 < 4; the radius of curvature R8 of the image-side surface of the fourth lens and the radius of curvature R9 of the object-side surface of the fifth lens satisfy the following relationship: 1 < R8 / R9 < 4; the inner diameter d4s of the object-side surface of the fourth spacer, the effective focal length f4 of the fourth lens, and the effective focal length f5 of the fifth lens satisfy the following relationship: 0 < d4s / (f4-f5) < 0.5.

[0019] The optical imaging lens of this application consists of a lens barrel and seven lenses and multiple spacers disposed in the lens barrel. By reasonably arranging the seven lenses and multiple spacers, and setting a fourth lens with positive optical power and a fifth lens with negative optical power, and when the optical imaging lens satisfies 1 < EP45 / CT5 < 4 and 1 < R8 / R9 < 4, the refraction direction of light passing through the fourth lens and the fifth lens can be effectively controlled, thereby ensuring the image height at each position in the field of view, and thus ensuring the final imaging quality. However, as shown in Figure 24, which is a schematic diagram of the internal reflection optical path of an existing optical imaging lens, it can be seen that light rays incident from the object side are prone to internal reflection at the edge of the effective radius of the image side of the fifth lens. This causes the light rays to undergo multiple reflections in the edge structure of the fifth lens before exiting at the edge of the effective radius of the object side of the fifth lens, forming stray light and affecting the imaging quality. Therefore, this application sets a fourth spacer and constrains 0 < d4s / (f4-f5) < 0.5. By controlling the inner diameter of the object side of the fourth spacer, the effective focal length of the fourth lens, and the effective focal length of the fifth lens, it is beneficial to ensure that the fourth spacer can effectively block the stray light generated by the fifth lens, thereby improving stray light and enhancing imaging quality.

Implementation Method

[0021] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other. The present invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0022] It should be noted that, unless otherwise specified, all technical and scientific terms used in this application have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains.

[0023] In this invention, unless otherwise stated, directional terms such as "upper", "lower", "top", and "bottom" are generally used in relation to the direction shown in the accompanying drawings, or in relation to the component itself in the vertical, perpendicular, or gravitational direction; similarly, for ease of understanding and description, "inner" and "outer" refer to the inner and outer contours of each component itself, but the above directional terms are not used to limit this invention.

[0024] It should be noted that in this specification, the terms "first," "second," "third," etc., are used only to distinguish one feature from another and do not imply any limitation on the features. Therefore, without departing from the teachings of this application, the first lens discussed below may also be referred to as the second lens or the third lens.

[0025] In the accompanying drawings, for ease of illustration, the thickness, size, and shape of the lenses have been slightly exaggerated. Specifically, the shapes of the spherical or aspherical surfaces shown in the drawings are illustrated by way of example. That is, the shapes of the spherical or aspherical surfaces are not limited to those shown in the drawings. The drawings are for illustrative purposes only and are not drawn strictly to scale.

[0026] In this document, the paraxial region refers to the region near the optical axis. If the lens surface is convex and the location of the convexity is not defined, it means that the lens surface is convex at least in the paraxial region; if the lens surface is concave and the location of the concaveness is not defined, it means that the lens surface is concave at least in the paraxial region. The determination of the surface shape in the paraxial region can be based on the judgment method commonly used by those skilled in the art, using the R value (R refers to the radius of curvature of the paraxial region, usually referring to the R value in the lens database of optical software) to determine convexity or concavity. For the incident light side, when the R value is positive, it is determined to be convex, and when the R value is negative, it is determined to be concave; for the emitting light side, 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.

[0027] In order to solve the problem of severe internal reflection stray light in the existing seven-lens optical imaging lens, the present invention provides an optical imaging lens.

[0028] As shown in Figures 1 to 23, in an optional embodiment of this application, the optical imaging lens includes a lens barrel, seven lenses, and multiple spacers. The seven lenses and multiple spacers are all disposed within the lens barrel. The seven lenses, from the object side to the image side, sequentially include a first lens with negative optical power, a second lens with positive optical power, a third lens with positive optical power, a fourth lens with positive optical power, a fifth lens with negative optical power, a sixth lens with positive optical power, and a seventh lens with negative optical power. An air gap exists between adjacent lenses from the first to the seventh lens. The multiple spacers include at least a fourth spacer and a fifth spacer, with the fourth spacer located at the fourth lens. The fifth spacer is located between the fifth and sixth lenses and abuts against the image-side portion of the fifth lens; the distance EP45 between the image-side and object-side of the fourth spacer and the fifth spacer on the optical axis satisfies the following relationship between the center thickness CT5 of the fifth lens and the image-side of the fifth lens: 1 < EP45 / CT5 < 4; the radius of curvature R8 of the image-side of the fourth lens and the radius of curvature R9 of the object-side of the fifth lens satisfy the following relationship: 1 < R8 / R9 < 4; the inner diameter d4s of the object-side of the fourth spacer, the effective focal length f4 of the fourth lens, and the effective focal length f5 of the fifth lens satisfy the following relationship: 0 < d4s / (f4-f5) < 0.5.

[0029] The optical imaging lens of this application consists of a lens barrel and seven lenses and multiple spacers disposed in the lens barrel. By reasonably arranging the seven lenses and multiple spacers, and setting a fourth lens with positive optical power and a fifth lens with negative optical power, and when the optical imaging lens satisfies 1 < EP45 / CT5 < 4 and 1 < R8 / R9 < 4, the refraction direction of light passing through the fourth lens and the fifth lens can be effectively controlled, thereby ensuring the image height at each position in the field of view, and thus ensuring the final imaging quality. However, as shown in Figure 24, which is a schematic diagram of the internal reflection optical path of an existing optical imaging lens, it can be seen that light rays incident from the object side are prone to internal reflection at the edge of the effective radius of the image side of the fifth lens. This causes the light rays to undergo multiple reflections in the edge structure of the fifth lens before exiting at the edge of the effective radius of the object side of the fifth lens, forming stray light and affecting the imaging quality. Therefore, this application sets a fourth spacer and constrains 0 < d4s / (f4-f5) < 0.5. By controlling the inner diameter of the object side of the fourth spacer, the effective focal length of the fourth lens, and the effective focal length of the fifth lens, it is beneficial to ensure that the fourth spacer can effectively block the stray light generated by the fifth lens, thereby improving stray light and enhancing imaging quality.

[0030] Furthermore, optical simulations were performed by changing the relationship between the inner diameter of the object side of the fourth spacer, the effective focal length of the fourth lens, and the effective focal length of the fifth lens. Figure 20 shows the stray light diagram when the optical imaging lens satisfies EP45 / CT5=1.9, R8 / R9=1.9, and d4s / (f4-f5)=0.8. Figure 21 shows the stray light diagram when the optical imaging lens satisfies EP45 / CT5=1.9, R8 / R9=1.9, and d4s / (f4-f5)=0.36. Figure 22 shows the stray light diagram when the optical imaging lens satisfies EP45 / CT5=2.7, R8 / R9=2.0, and d4s / (f4-f5)=0.8. Figure 23 shows the stray light diagram when the optical imaging lens satisfies EP45 / CT5=2.7, R8 / R9=2.0, and d4s / (f4-f5)=0.5. As can be seen from Figures 20 and 22, the stray light spots are quite obvious, indicating that the stray light energy is high. By comparison, the stray light spot in Figure 21 is significantly reduced compared to Figure 20, and the stray light spot in Figure 23 is significantly reduced compared to Figure 22. Therefore, by limiting 1 < EP45 / CT5 < 4, 1 < R8 / R9 < 4, and 0 < d4s / (f4-f5) < 0.5, this application can effectively reduce the stray light generated by the fifth lens, thus achieving the purpose of improving stray light.

[0031] In this embodiment, the plurality of spacers further includes a first spacer and a second spacer. The first spacer is located between the first lens and the second lens and abuts against the image-side surface of the first lens. The second spacer is located between the second lens and the third lens and abuts against the image-side surface of the second lens. The inner diameter d1s of the object-side surface of the first spacer, the inner diameter d2s of the object-side surface of the second spacer, and the effective focal length f2 of the second lens satisfy the following condition: 2 < f2 / (d1s-d2s) < 10. Constraining this condition not only distinguishes the appearance differences of the optical imaging lens, but also ensures that each spacer is sequentially assembled with the lens barrel and each lens, ensuring assembly stability. Furthermore, by setting the first spacer and the second spacer, stray light generated by reflection from the image-side surface of the first lens is effectively intercepted from entering the second lens, reducing ghosting and thus improving the imaging quality of the optical imaging lens.

[0032] In this embodiment, the inner diameter d1m of the image-side surface of the first spacer, the outer diameter D1m of the image-side surface of the first spacer, and the distance T12 on the optical axis from the image-side surface of the first lens to the object-side surface of the second lens satisfy the following condition: 2 < (D1m - d1m) / T12 < 6. By constraining the inner diameter of the image-side surface of the first spacer, the outer diameter of the image-side surface of the first spacer, and the distance on the optical axis from the image-side surface of the first lens to the object-side surface of the second lens, the position of light rays passing through the second lens can be effectively controlled, thereby reducing stray light generated by reflection from the second lens. At the same time, the path accuracy of light rays passing through the second lens is effectively ensured, thereby controlling the image height of each field of view to the required design position and ensuring imaging quality.

[0033] In this embodiment, the inner diameter d2s of the object side of the second spacer, the inner diameter d2m of the image side of the second spacer, the radius of curvature R4 of the image side of the second lens, and the radius of curvature R5 of the object side of the third lens satisfy the following condition: -0.5 < d2s / R4 - d2m / R5 < 1. By constraining the radii of curvature of the second and third lenses, it is helpful to constrain the surface shape of the second and third lenses, so that the light is transmitted according to the predetermined optical path, which is beneficial to ensure the positional accuracy of the light passing through the second and third lenses; at the same time, by controlling the inner diameter of the object side of the second spacer and the inner diameter of the image side of the second spacer, it is helpful to constrain the outer diameter of the second lens, thereby effectively controlling the size of the second lens and thus reducing its weight, thereby reducing the total weight of the optical imaging lens, achieving lightweighting, and controlling the inner diameter of the image side of the second spacer can reduce stray light entering the third lens, thereby improving the imaging quality.

[0034] In this embodiment, the plurality of spacers also includes a third spacer. The third spacer is located between the third lens and the fourth lens and abuts against the image-side portion of the third lens. The inner diameter d3s of the object-side surface of the third spacer, the outer diameter D3m of the image-side surface of the third spacer, the effective focal length f3 of the third lens, and the effective focal length f4 of the fourth lens satisfy the following condition: -5 < (D3m - d3s) / (f4 - f3) < 15. By constraining this condition, the outer diameter of the third lens can be controlled, and the inner diameter of the second spacer can be controlled at the same time to reduce stray light entering the third lens. Constraining the effective focal lengths of the third lens and the fourth lens is beneficial for controlling the overall length of the lens group near the object-side end of the optical imaging lens, thereby controlling the overall length of the optical imaging lens and facilitating miniaturization.

[0035] In this embodiment, the inner diameter d2m of the image-side surface of the second spacer, the effective diameter DT31 of the central light-transmitting area of ​​the object-side surface of the third lens, and the effective diameter DT22 of the central light-transmitting area of ​​the image-side surface of the second lens satisfy the following: -18 < d2m / (DT22-DT31) < 8. By constraining the effective diameters of the central light-transmitting area of ​​the image-side surface of the second lens and the effective diameters of the central light-transmitting area of ​​the object-side surface of the third lens, it is helpful to control the transmission of light along a predetermined optical path in the rear lens group of the optical imaging lens, thereby controlling the image height of each field of view to the required position. At the same time, it indirectly controls the effective diameters of the second and third lenses, which is beneficial to ensuring the shape uniformity of each lens, thereby improving the formability and structural stability of the lens.

[0036] In this embodiment, the outer diameter D1s of the object side of the first spacer, the outer diameter D2s of the object side of the second spacer, the effective diameter DT12 of the central light-transmitting area of ​​the image side of the first lens, and the effective diameter DT22 of the central light-transmitting area of ​​the image side of the second lens satisfy the following condition: 0 < |D2s-D1s| / (DT12-DT22) < 0.1. Constraining this condition helps control the effective diameter difference and outer diameter of the first and second lenses, ensuring the structural rationality of the first and second lenses, thereby improving the overall formability and assembly stability of the lens, increasing the pass rate of the optical imaging lens during the production process, and also helping to control the overall size of the lens barrel and improve the adaptability of the shape.

[0037] In this embodiment, the inner diameter d5s of the object-side surface of the fifth spacer, the inner diameter d4m of the image-side surface of the fourth spacer, the radius of curvature R9 of the object-side surface of the fifth lens, and the radius of curvature R10 of the image-side surface of the fifth lens satisfy the following relationship: 0 < d5s / R10 - d4m / R9 < 1.5. By constraining the radius of curvature of the object-side surface and the radius of curvature of the image-side surface of the fifth lens, the curvature of the two side surfaces of the fifth lens can be constrained, thereby effectively controlling the reasonable distribution of the optical power of the fifth lens, ensuring the accuracy of the path of light passing through the fifth lens, thereby improving the imaging quality of the optical imaging lens and increasing the performance limit of the optical imaging lens. At the same time, controlling the inner diameter of the fourth and fifth spacers ensures that the fourth and fifth spacers can effectively intercept stray light reflected to them, while avoiding stray light generated by reflection from the spacers.

[0038] In this embodiment, among the multiple spacers, specifically among the first to sixth spacers, the second spacer has the smallest inner diameter; and satisfies the condition that 0 < (d1s-d2s) / (d3s-d2s) < 3 between the inner diameters d1s of the object side of the first spacer, d2s of the object side of the second spacer, and d3s of the object side of the third spacer. This setting helps to control the dimensions of the first, second, and third spacers, ensuring that the inner diameter of the second spacer is the smallest, thereby ensuring the appearance difference of the spacers. Since the effective diameter difference between the first, second, and third lenses of the optical imaging lens of this application is relatively large, constraining this condition can also ensure the accuracy of the light path transition from the first lens to the third lens, reduce the difference in the effective diameter size of the first, second, and third lenses, and ensure the assembly stability of the optical imaging lens.

[0039] In this embodiment, the inner diameter d5s of the object-side surface of the fifth spacer, the inner diameter d5m of the image-side surface of the fifth spacer, the effective diameter DT52 of the central light-transmitting area of ​​the image-side surface of the fifth lens, and the effective diameter DT61 of the central light-transmitting area of ​​the object-side surface of the sixth lens satisfy the following condition: 0 < d5s / DT52 - d5m / DT61 ​​< 0.5. By constraining this condition, the height and amount of light passing through the fifth and sixth lenses can be controlled, the effective diameter difference between the fifth and sixth lenses can be reduced, and the height difference between the light passing through the fifth and sixth lenses can be reasonably controlled, thereby effectively improving the stray light generated by the sixth lens. At the same time, the assembly stability of the fifth and sixth lenses can be improved, thereby ensuring the overall structural stability of the optical imaging lens.

[0040] In this embodiment, the plurality of spacers also includes a sixth spacer, which is located between the sixth lens and the seventh lens and abuts against the image-side portion of the sixth lens; the inner diameter d6s of the object-side portion of the sixth spacer, the center thickness CT6 of the sixth lens, and the center thickness CT7 of the seventh lens satisfy the following: 2 < d6s / (CT6+CT7) < 5. By controlling the center thicknesses of the sixth and seventh lenses within a reasonable range, the structural strength of the sixth and seventh lenses can be guaranteed, which is beneficial to lens forming. At the same time, controlling the inner diameter of the sixth spacer can effectively avoid stray light generated by reflection from the inner diameter surface of the sixth spacer, and can also effectively control the position of light passing through the seventh lens, ultimately reducing the possibility of stray light generated by the seventh lens, while ensuring the accuracy of the imaging light path when passing through the last lens, thus ensuring imaging stability.

[0041] In this embodiment, the outer diameter D1s of the object side of the first spacer, the outer diameter D6m of the image side of the sixth spacer, the effective diameter DT11 of the central light-transmitting area of ​​the object side of the first lens, and the effective diameter DT72 of the central light-transmitting area of ​​the image side of the seventh lens satisfy the following condition: 1.7 < D1s / D6m + DT11 / DT72 < 2.1. Constraining this condition allows control over the effective diameter difference and outer diameter difference between the first and seventh lenses. Since the effective diameters of the central light-transmitting area of ​​the object side of the first lens and the central light-transmitting area of ​​the image side of the seventh lens are the largest in the optical imaging lens of this application, controlling their difference helps control the overall structural difference of the optical imaging lens, thereby ensuring the assembly stability of the optical imaging lens. Simultaneously, controlling the outer diameter dimensions at both ends of the lens barrel ensures that the diameter difference between the two ends is not too large, thus ensuring that the volume of the optical imaging lens is within a suitable range and avoiding instability problems caused by excessive differences in the front and rear dimensions of the optical imaging lens.

[0042] As shown in Figures 1 to 23, in another optional embodiment of this application, the optical imaging lens includes a lens barrel, seven lenses, and multiple spacers. The seven lenses and multiple spacers are all disposed within the lens barrel. The seven lenses, from the object side to the image side, sequentially include a first lens with negative optical power, a second lens with positive optical power, a third lens with positive optical power, a fourth lens with positive optical power, a fifth lens with negative optical power, a sixth lens with positive optical power, and a seventh lens with negative optical power. An air gap exists between adjacent lenses from the first to the seventh lens. The multiple spacers include at least a fourth spacer and a fifth spacer. The fourth spacer is located between the fourth and fifth lenses and is adjacent to the fourth lens. The image-side portion of the fifth spacer abuts against the fifth lens, and the fifth spacer is located between the fifth and sixth lenses and abuts against the image-side portion of the fifth lens; the distance EP45 between the image-side portion of the fourth spacer and the object-side portion of the fifth spacer on the optical axis satisfies the following relationship with the center thickness CT5 of the fifth lens: 1 < EP45 / CT5 < 4; the radius of curvature R8 of the image-side portion of the fourth lens satisfies the following relationship with the radius of curvature R9 of the object-side portion of the fifth lens: 1 < R8 / R9 < 4; the inner diameter d5s of the object-side portion of the fifth spacer, the inner diameter d4m of the image-side portion of the fourth spacer, the radius of curvature R9 of the object-side portion of the fifth lens, and the radius of curvature R10 of the image-side portion of the fifth lens satisfy the following relationship: 0 < d5s / R10 - d4m / R9 < 1.5.

[0043] The optical imaging lens of this application consists of a lens barrel and seven lenses and multiple spacers disposed in the lens barrel. By reasonably arranging the seven lenses and multiple spacers, and setting a fourth lens with positive optical power and a fifth lens with negative optical power, and when the optical imaging lens satisfies 1 < EP45 / CT5 < 4 and 1 < R8 / R9 < 4, the refraction direction of light passing through the fourth lens and the fifth lens can be effectively controlled, thereby ensuring the image height at each position in the field of view, and thus ensuring the final imaging quality. However, at the same time, light is prone to internal reflection within the fifth lens, resulting in stray light and affecting image quality. Therefore, this application constrains the curvature of the two surfaces of the fifth lens by setting 0 < d5s / R10 - d4m / R9 < 1.5, thereby effectively controlling the reasonable distribution of the optical power of the fifth lens, ensuring the accuracy of the light path through the fifth lens, improving the image quality of the optical imaging lens, and increasing the performance limit of the optical imaging lens. At the same time, it controls the inner diameter of the fourth and fifth spacers to ensure that the fourth and fifth spacers can effectively intercept stray light reflected to them, while avoiding stray light generated by spacer reflection.

[0044] Optionally, the optical imaging lens may also include protective glass for protecting the photosensitive element located on the imaging surface.

[0045] The optical imaging lens in this application may employ multiple lenses, such as the seven lenses described above. In this application, at least one of the mirror surfaces of each lens is an aspherical mirror surface. The characteristic of an aspherical lens is that its curvature changes continuously from the lens center to the lens periphery. Unlike a spherical lens, which has a constant curvature from the lens center to the lens periphery, an aspherical lens has better curvature radius characteristics, offering advantages in improving distortion aberrations and astigmatism. By using an aspherical lens, aberrations occurring during imaging can be eliminated as much as possible, thereby improving image quality.

[0046] Optionally, the optical imaging lens may also include an aperture stop (not shown in the figure), which is located between the second lens and the third lens.

[0047] However, those skilled in the art will understand that the number of lenses constituting the optical imaging lens can be changed without departing from the technical solutions claimed in this application to obtain the various results and advantages described in this specification. For example, although eight lenses are described as an example in the embodiments, the optical imaging lens is not limited to including eight lenses. If necessary, the optical imaging lens may also include other numbers of lenses.

[0048] Figure 1 shows a schematic diagram of the structure of an optical imaging lens according to this application. Figure 1 indicates parameters such as EP45, D3m, d3s, D2s, d2m, d2s, D1m, D1s, d1m, d1s, d4s, d4m, d5s, d5m, d6s, and D6m to clearly and intuitively understand the meaning of these parameters. For the sake of clarity regarding the optical imaging lens and its specific surface shape, these parameters will not be shown in the accompanying drawings when describing specific embodiments later.

[0049] The following describes examples of specific surface shapes and parameters of optical imaging lenses applicable to the above embodiments, with reference to the accompanying drawings.

[0050] It should be noted that there are three sub-implementations in the same embodiment described below. The first to seventh lenses of the optical imaging lens in the multiple sub-implementations of the same embodiment have the same parameters such as radius of curvature, center thickness, inter-lens spacing, and higher-order coefficients. However, the thickness, inner diameter, and outer diameter of the lens barrel, the first to sixth spacers, and the shape of the lenses are different. In other words, the main structure used for imaging is the same, but the auxiliary structures used for imaging are different.

[0051] It should be noted that any one of the following embodiments, from Embodiment 1 to Embodiment 3, is applicable to all embodiments of this application.

[0052] Of course, this embodiment may also include other parametric formulas in the above embodiments, which will not be described in detail here.

[0053] Example 1

[0054] As shown in Figures 2 to 7, the optical imaging lens of Embodiment 1 is described. Figure 2 shows a structural schematic diagram of the optical imaging lens of Embodiment 1 under Embodiment 1-1, Figure 3 shows a structural schematic diagram of the optical imaging lens of Embodiment 1 under Embodiment 1-2, and Figure 4 shows a structural schematic diagram of the optical imaging lens of Embodiment 1 under Embodiment 1-3.

[0055] As shown in Figures 2 to 4, the optical imaging lens includes a lens barrel P0 and the following components arranged sequentially from the object side to the image side along the optical axis of the lens barrel P0: a first lens E1, a first spacer P1, a second lens E2, a second spacer P2, a third lens E3, a third spacer P3, a fourth lens E4, a fourth spacer P4, a fifth lens E5, a fifth spacer P5, a sixth lens E6, a sixth spacer P6, and a seventh lens E7.

[0056] As shown in Figure 2, in Embodiment 1-1, the object-side and image-side of the optical imaging lens abut against the image-side S2 of the first lens and the object-side S3 of the second lens, respectively. The object-side and image-side of the second spacer P2 abut against the image-side S4 of the second lens and the object-side S5 of the third lens, respectively. The object-side and image-side of the third spacer P3 abut against the image-side S6 of the third lens and the object-side S7 of the fourth lens, respectively. The object-side and image-side of the fourth spacer P4 abut against the image-side S8 of the fourth lens and the object-side S9 of the fifth lens, respectively. The object-side and image-side of the fifth spacer P5 abut against the image-side S10 of the fifth lens and the object-side S11 of the sixth lens, respectively. The object-side and image-side of the sixth spacer P6 abut against the image-side S12 of the sixth lens and the object-side S13 of the seventh lens, respectively.

[0057] As shown in Figure 3, in Embodiments 1-2, the bearing and contact method of each spacer of the optical imaging lens is the same as that in Embodiment 1-1. Please refer to the relevant description in Embodiment 1-1, which will not be repeated here.

[0058] As shown in Figure 4, in Embodiments 1-3, the bearing and contact method of each spacer of the optical imaging lens is the same as that in Embodiment 1-1. Please refer to the relevant description in Embodiment 1-1, which will not be repeated here.

[0059] In summary, the structural parameters of the optical imaging lens of Embodiment 1 in Embodiments 1-1, 1-2, and 1-3 are shown in Table 1. (Unit: mm) Parameters / Examples 1-1 1-2 1-3 d1s 3.26 3.26 3.51 d1m 3.26 3.26 3.51 D1s 8.72 8.52 6.62 D1m 8.72 8.52 6.62 d2s 1.80 1.80 1.80 d2m 1.80 1.80 1.80 D2s 8.82 8.62 6.74 d3s 2.36 6.13 2.39 D3m 8.92 8.60 6.74 d4s 2.68 2.68 2.66 d4m 2.68 2.68 2.66 d5s 3.48 6.33 3.42 d5m 3.48 6.53 3.42 d6s 5.00 5.00 5.00 D6m 9.22 9.02 9.02 EP45 0.80 0.72 0.83 Table 1

[0060] In Embodiment 1, the object-side surface S1 of the first lens is concave, and the image-side surface S2 of the first lens is concave. The object-side surface S3 of the second lens is convex, and the image-side surface S4 of the second lens is concave. The object-side surface S5 of the third lens is convex, and the image-side surface S6 of the third lens is convex. The object-side surface S7 of the fourth lens is convex, and the image-side surface S8 of the fourth lens is convex. The object-side surface S9 of the fifth lens is concave, and the image-side surface S10 of the fifth lens is convex. The object-side surface S11 of the sixth lens is convex, and the image-side surface S12 of the sixth lens is convex. The object-side surface S13 of the seventh lens is convex, and the image-side surface S14 of the seventh lens is concave.

[0061] In Embodiment 1, the effective focal length of the optical imaging lens is f = 2.33 mm, the effective focal length of the first lens is f1 = -3.87 mm, the effective focal length of the second lens is f2 = 9.99 mm, the effective focal length of the third lens is f3 = 4.69 mm, the effective focal length of the fourth lens is f4 = 5.27 mm, the effective focal length of the fifth lens is f5 = -5.17 mm, the effective focal length of the sixth lens is f6 = 3.37 mm, the effective focal length of the seventh lens is -5.76 mm, half of the maximum field of view (Semi-FOV) of the optical imaging lens is 61.85°, and the entrance pupil diameter (EPD) of the optical imaging lens is 1.26 mm.

[0062] Table 2 shows the basic structural parameters of the optical imaging lens of Embodiment 1, wherein the units of radius of curvature and thickness / distance are millimeters (mm). Face number Surface type radius of curvature thickness Material Effective radius Refractive index Abbe number OBJ spherical endless endless S1 aspherical -3.7836 0.5381 1.54 56.11 3.3463 S2 aspherical 5.0115 0.9860 2.0682 S3 aspherical 2.0352 0.5103 1.59 28.41 1.4129 S4 aspherical 1.8450 0.6677 1.1073 STO spherical endless -0.0170 0.8990 S5 aspherical 5.0699 0.6780 1.54 56.11 0.9626 S6 aspherical -4.9321 0.1514 1.1031 S7 aspherical 7.4534 0.7436 1.54 56.11 1.2212 S8 aspherical -4.5238 0.2631 1.3209 S9 aspherical -2.2589 0.3000 1.67 19.24 1.3444 S10 aspherical -6.7186 0.1686 1.6443 S11 aspherical 113.4017 1.2687 1.54 56.11 2.0728 S12 aspherical -2.9065 0.0685 2.4509 S13 aspherical 2.1515 0.6465 1.66 20.37 2.5725 S14 aspherical 1.2133 0.5637 3.3550 S15 spherical Infinite 0.2100 1.52 64.2 3.9583 S16 spherical Infinite 0.4970 4.0364 S17 spherical Infinite 0.0000 4.3468 Table 2

[0063] In Embodiment 1, the object-side surface and image-side surface of the first to seventh lenses are both aspherical surfaces, and the surface shape of each aspherical lens can be defined using, but is not limited to, the following aspherical formula:

[0064] Formula (1)

[0065] Where x is the distance vector from the vertex of the aspherical surface at a height h along the optical axis; c is the paraxial curvature of the aspherical surface, c = 1 / R, that is, the paraxial curvature c is the reciprocal of the radius of curvature R in Table 2 above; k is the conic coefficient; Ai is the i-th order correction coefficient of the aspherical surface. Table 3 below gives the higher-order coefficients A4, A6, A8, A10, A12, A14, A16, A18, A20, A22, A24, A26, A28 and A30 that can be used for each aspherical mirror S1-S14 in Example 1. Face number A4 A6 A8 A10 A12 A14 A16 S1 2.6594E+00 -4.3541E-01 1.6063E-01 -6.1229E-02 2.4916E-02 -1.2373E-02 4.8531E-03 S2 8.5024E-01 -1.0309E-01 3.5708E-03 -2.6909E-02 -2.4596E-03 1.2587E-04 1.9401E-03 S3 6.5243E-02 -2.0001E-02 -1.5244E-02 -5.6304E-03 -3.6495E-04 4.7744E-04 3.2593E-04 S4 -1.2362E-01 -6.0394E-03 1.1121E-02 -3.5723E-03 -5.8171E-04 1.1170E-03 -6.1538E-04 S5 3.8241E-03 -3.7029E-04 -3.9535E-05 -1.4517E-05 5.1784E-06 3.9428E-06 6.5605E-06 S6 -1.0727E-01 9.9793E-03 -7.8537E-04 1.5163E-04 7.0227E-05 1.1586E-05 3.4693E-05 S7 -1.4499E-01 1.4476E-02 -1.3001E-03 1.3789E-04 5.1089E-05 4.5342E-05 2.5498E-05 S8 -2.4678E-01 -1.0538E-02 5.9326E-03 -7.4897E-04 -2.1556E-04 -1.2985E-04 2.1118E-06 S9 -2.0904E-01 -7.9841E-03 2.7864E-03 -8.5172E-04 -7.9487E-05 -6.0257E-04 7.1104E-06 S10 5.7437E-02 2.6936E-02 2.9209E-04 -3.4619E-03 1.8250E-03 -1.4662E-03 6.3804E-04 S11 3.9147E-01 5.0513E-02 2.6346E-02 -1.2996E-02 -6.9049E-03 2.1682E-03 -4.0073E-03 S12 3.0046E-01 -1.4065E-01 7.1252E-02 -3.9915E-02 5.2975E-03 3.9262E-03 9.0835E-043] S13 -2.7614E+00 \ 3.9971E-01 -1.7751E-02 -3.3227E-03 -4.1729E-04<I 5.4141E-03 -1.2554E-04 S14 -5.8070E+00 ] 1.0282E+00 -3.1258E-01 1.1366E-01 -4.4172E-02 2.1417E-02 -8.6059E-03 Surface number A18 A20 A22 A24 A26 A28 A30 S1 -2.9529E-03 1.0829E-03 -6.7892E-04 2.9586E-04 -1.1272E-04 5.9200E-05 0.0000E+00 S2 8.4804E-04 1.5601E-04 -4.3822E-05 -8.9457E-05 0.0000E+00 0.0000E+00 0.0000E+00 S3 4.4456E-05 -2.2203E-05 -2.3284E-05 9.1131E-06 9.0126E-06 7.1492E-06 -4.2674E-06 S4 1.9730E-04 -5.8748E-05 2.9735E-05 1.6853E-05 -2.8426E-05 -7.3644E-06 0.0000E+00 S5 3.2343E-07 -1.6975E-06 -1.9084E-06 2.1437E-07 1.6223E-07 0.0000E+00 0.0000E+00 S6 6.1361E-07 1.8528E-05 -2.3736E-06 2.2135E-06 -7.1402E-06 1.9978E-06 0.0000E+00 S7 2.8577E-05 1.4222E-06 1.5661E-06 2.3974E-08 -1.8757E-06 -1.5891E-06 7.0563E-07 S8 4.0307E-05 2.7099E-05 9.4473E-06 3.7799E-07 2.5009E-06 -2.8508E-06 2.9526E-07 S9 3.8089E-05 4.3316E-05 -7.8206E-06 -5.0576E-06 6.9077E-07 8.1432E-09 1.3163E-07 S10 -1.2764E-04 8.1775E-05 -6.5188E-05 1.7314E-05 -8.9441E-06 6.7877E-06 -1.4434E-06 S11 3.3578E-04 -7.7620E-04 -4.7965E-04 -3.3754E-04 -1.2226E-04 4.8394E-05 0.0000E+00 S12 -2.9663E-04 3.0206E-04 -2.0540E-04 1.4477E-04 -7.5142E-05 0.0000E+00 0.0000E+00 S13 -1.3558E-03 3.2892E-04 -4.5779E-04 1.6679E-04 6.5093E-06 0.0000E+00 0.0000E+00 S14 4.3852E-03 -2.2585E-03 7.8283E-04 -2.5618E-04 1.3707E-04 -6.3825E-05 1.1526E-05 Table 3

[0066] Figure 5 shows the axial chromatic aberration curve of the optical imaging lens of Embodiment 1, which represents the deflection of the focal point after light of different wavelengths passes through the optical imaging lens. Figure 6 shows the astigmatism curve of the optical imaging lens of Embodiment 1, which represents the meridional image plane curvature and the sagittal image plane curvature. Figure 7 shows the distortion curve of the optical imaging lens of Embodiment 1, which represents the distortion magnitude corresponding to different field of view angles.

[0067] As can be seen from Figures 5 to 7, the optical imaging lens provided in Embodiment 1 can achieve good imaging quality.

[0068] Implementation Example 2

[0069] As shown in Figures 8 to 13, the optical imaging lens of Embodiment 2 is described. Figure 8 shows a schematic diagram of the structure of the optical imaging lens of Embodiment 2 under Embodiment 2-1, Figure 9 shows a schematic diagram of the structure of the optical imaging lens of Embodiment 2 under Embodiment 2-2, and Figure 10 shows a schematic diagram of the structure of the optical imaging lens of Embodiment 2 under Embodiment 2-3.

[0070] As shown in Figures 8 to 10, the optical imaging lens includes a lens barrel P0 and the following components arranged sequentially from the object side to the image side along the optical axis of the lens barrel P0: a first lens E1, a first spacer P1, a second lens E2, a second spacer P2, a third lens E3, a third spacer P3, a fourth lens E4, a fourth spacer P4, a fifth lens E5, a fifth spacer P5, a sixth lens E6, a sixth spacer P6, and a seventh lens E7.

[0071] As shown in Figure 8, in Embodiment 2-1, the object-side and image-side of the first spacer P1 abut against the image-side S2 of the first lens and the object-side S3 of the second lens, respectively. The object-side and image-side of the second spacer P2 abut against the image-side S4 of the second lens and the object-side S5 of the third lens, respectively. The object-side and image-side of the third spacer P3 abut against the image-side S6 of the third lens and the object-side S7 of the fourth lens, respectively. The object-side and image-side of the fourth spacer P4 abut against the image-side S8 of the fourth lens and the object-side S9 of the fifth lens, respectively. The object-side and image-side of the fifth spacer P5 abut against the image-side S10 of the fifth lens and the object-side S11 of the sixth lens, respectively. The object-side and image-side of the sixth spacer P6 abut against the image-side S12 of the sixth lens and the object-side S13 of the seventh lens, respectively.

[0072] As shown in Figure 9, in Embodiment 2-2, the bearing and contact method of each spacer of the optical imaging lens is the same as that in Embodiment 2-1. Please refer to the relevant description in Embodiment 2-1, which will not be repeated here.

[0073] As shown in Figure 10, in Embodiment 2-3, the bearing and contact method of each spacer of the optical imaging lens is the same as that in Embodiment 2-1. Please refer to the relevant description in Embodiment 2-1, which will not be repeated here.

[0074] In summary, the structural parameters of the optical imaging lens of Embodiment 2 in Embodiments 2-1, 2-2, and 2-3 are shown in Table 4. (Unit: mm) Parameters / Examples 2-1 2-2 2-3 d1s 3.22 3.65 3.31 d1m 3.22 3.65 3.31 D1s 8.72 8.82 7.44 D1m 8.72 8.82 7.44 d2s 1.81 1.81 1.81 d2m 1.81 1.81 1.81 D2s 8.82 8.92 7.40 d3s 2.66 5.09 2.63 D3m 8.92 8.84 7.30 d4s 2.90 2.90 3.08 d4m 2.90 2.90 3.08 d5s 3.56 5.08 3.53 d5m 3.56 5.28 3.53 d6s 4.71 4.71 4.80 D6m 9.22 9.32 9.52 EP45 0.76 0.61 0.75 Table 4

[0075] In Embodiment 2, the object-side surface S1 of the first lens is concave, and the image-side surface S2 of the first lens is concave. The object-side surface S3 of the second lens is convex, and the image-side surface S4 of the second lens is concave. The object-side surface S5 of the third lens is convex, and the image-side surface S6 of the third lens is convex. The object-side surface S7 of the fourth lens is convex, and the image-side surface S8 of the fourth lens is convex. The object-side surface S9 of the fifth lens is concave, and the image-side surface S10 of the fifth lens is convex. The object-side surface S11 of the sixth lens is convex, and the image-side surface S12 of the sixth lens is convex. The object-side surface S13 of the seventh lens is convex, and the image-side surface S14 of the seventh lens is concave.

[0076] In Embodiment 2, the effective focal length f of the optical imaging lens is 2.33 mm, the effective focal length f1 of the first lens is -4.27 mm, the effective focal length f2 of the second lens is 10.97 mm, the effective focal length f3 of the third lens is 4.30 mm, the effective focal length f4 of the fourth lens is 6.05 mm, the effective focal length f5 of the fifth lens is -4.30 mm, the effective focal length f6 of the sixth lens is 3.46 mm, the effective focal length of the seventh lens is -7.81 mm, half of the maximum field of view (Semi-FOV) of the optical imaging lens is 61.83°, and the entrance pupil diameter (EPD) of the optical imaging lens is 1.26 mm.

[0077] Table 5 shows the basic structural parameters of the optical imaging lens of Embodiment 2, wherein the units of radius of curvature and thickness / distance are millimeters (mm). Face number Surface type radius of curvature thickness Material Effective radius Refractive index Abbe number OBJ spherical endless endless S1 aspherical -3.8062 0.7132 1.54 55.92 3.6532 S2 aspherical 6.3972 1.0828 2.2225 S3 aspherical 2.1251 0.3500 1.58 38.32 1.3938 S4 aspherical 2.9701 0.5438 1.1440 STO spherical endless 0.0730 0.8917 S5 aspherical 4.5278 0.8360 1.54 55.92 1.1947 S6 aspherical -4.5629 0.2139 1.3043 S7 aspherical 5.8783 0.6131 1.54 55.92 1.3698 S8 aspherical -7.2578 0.1823 1.4485 S9 aspherical -1.9215 0.2500 1.67 19.24 1.4492 S10 aspherical -5.9391 0.1645 1.7176 S11 aspherical 4.6077 1.2040 1.54 55.92 2.0944 S12 aspherical -2.9002 0.1607 2.3260 S13 aspherical 2.0901 0.6941 1.67 19.24 2.4658 S14 aspherical 1.2969 0.5518 3.3470 S15 spherical Infinite 0.2100 1.52 64.2 3.9528 S16 spherical Infinite 0.4851 4.0330 S17 spherical Infinite 0.0000 4.3469 Table 5

[0078] Table 6 below gives the higher-order coefficients A4, A6, A8, A10, A12, A14, A16, A18, A20, A22, A24, A26, A28 and A30 that can be used for each aspherical mirror S1-S14 in Embodiment 2. Face number A4 A6 A8 A10 A12 A14 A16 S1 3.6719E+00 -3.9398E-01 2.5009E-01 -2.6750E-02 4.7635E-02 1.7638E-03 1.3044E-02 S2 1.0974E+00 -1.5020E-01 6.5656E-03 -1.7923E-02 -3.0898E-03 -8.7509E-04 1.5866E-03 S3 2.5175E-03 -4.0018E-02 -1.4500E-03 1.3114E-03 -1.4191E-04 -3.0513E-04 -7.5429E-06 S4 5.5331E-02 -1.6594E-03 1.0628E-03 8.5652E-04 1.6498E-04 -1.7816E-05 -2.0640E-05 S5 3.2827E-02 -9.2536E-04 -6.9085E-04 -1.8696E-04 1.5985E-05 4.7090E-05 1.6346E-05 S6 -1.3706E-01 1.6250E-02 -3.4758E-03 -9.1129E-04 -2.1922E-04 4.2633E-05 8.7131E-05 S7 -2.4964E-01 4.8163E-03 1.4834E-03 -1.4117E-03 5.2483E-04 4.6339E-04 1.2556E-04 S8 -3.4023E-01 -1.8598E-02 1.4344E-02 -3.3266E-04 2.4474E-03 1.5142E-03 2.2645E-05 S9 -2.5033E-01 -1.1038E-02 -3.5992E-03 -6.6567E-04 3.4837E-03 7.2346E-04 -6.5116E-05 S10 6.2662E-02 2.5992E-02 -1.0840E-03 -4.7407E-03 5.0148E-03 -2.3718E-03 1.0236E-03 S11 -5.5608E-01 4.9421E-02 2.2779E-02 -2.4072E-02 2.6036E-03 -6.2883E-04 1.9946E-03 S12 1.5550E-01 -2.5002E-02 6.3524E-02 -3.4166E-02 -1.2172E-02 -5.5839E-04 4.8377E-03 S13 -2.6431E+00 3.2931E-01 4.1382E-03 -2.8016E-03 -2.5181E-03 -4.2958E-04 3.3682E-03 S14 -​5.4295E+00 9.0913E-01<​ -2.6473E-01 9.4578E-02 -3.1915E-02 1.3939E-02 -2.5538E-03 Surface number A18 A20 A22 A24 A26 A28 [​A30 S1 2.6378E-03 4.0899E-03 1.2282E-03 1.1789E-03 3.8729E-04 2.4407E-04 5.8870E-05 S2 1.4436E-03 4.6982E-04 -8.4223E-05 -2.9145E-04 -8.4884E-05 -8.5521E-06 3.3687E-05 S3 7.5112E-05 2.4086E-05 3.7699E-06 9.1488E-06 1.6361E-06 -2.5324E-06 -1.4303E-07 S4 8.7697E-06 -7.2490E-06 -1.9652E-06 8.3918E-07 0.0000E+00 0.0000E+00 0.0000E+00 S5 9.5978E-06 -6.5613E-06 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 S6 4.8121E-05 3.3059E-05 8.5415E-06 1.7319E-07 -5.1031E-06 4.1642E-07 0.0000E+00 S7 -3.3614E-06 -3.4746E-05 -6.5736E-06 -6.6521E-06 2.7183E-06 -1.7536E-06 7.8543E-07 S8 -1.8949E-04 9.8447E-06 -2.3943E-05 -5.3738E-05 -7.2808E-06 -7.6783E-06 7.5542E-06 S9 -4.4656E-04 5.0578E-05 1.9308E-06 -2.5445E-05 2.6379E-05 -5.4651E-06 0.0000E+00 S10 -5.8872E-04 3.4940E-04 -1.4546E-04 5.8173E-05 -1.4405E-05 0.0000E+00 0.0000E+00 S11 -1.3816E-03 6.7038E-04 -1.2426E-04 1.1262E-04 -9.7402E-05 3.8369E-05 -8.0400E-06 S12 5.2771E-04 -9.6470E-05 -2.5074E-04 -2.0128E-06 3.9676E-05 5.4460E-05 -3.1498E-05 S13 -9.7517E-05 5.1078E-04 2.6492E-04 -4.5727E-04 -2.8773E-04 4.0389E-05 5.7543E-05 S14 1.8000E-03 5.2465E-04 4.1474E-05 -3.1751E-04 -9.6018E-05 -1.0861E-04 7.0639E-05 Table 6

[0079] Figure 11 shows the on-axis chromatic aberration curve of the optical imaging lens of Embodiment 2, which represents the deviation of the focal point of light of different wavelengths after passing through the optical imaging lens. Figure 12 shows the astigmatism curve of the optical imaging lens of Embodiment 2, which represents the meridional image plane curvature and the sagittal image plane curvature. Figure 13 shows the distortion curve of the optical imaging lens of Embodiment 2, which represents the distortion magnitude corresponding to different field of view angles.

[0080] As can be seen from Figures 11 to 13, the optical imaging lens given in Embodiment 2 can achieve good imaging quality.

[0081] Example 3

[0082] As shown in Figures 14 to 19, the optical imaging lens of Embodiment 3 is described. Figure 14 shows a schematic diagram of the structure of the optical imaging lens of Embodiment 3 under Embodiment 3-1, Figure 15 shows a schematic diagram of the structure of the optical imaging lens of Embodiment 3 under Embodiment 3-2, and Figure 16 shows a schematic diagram of the structure of the optical imaging lens of Embodiment 3 under Embodiment 3-3.

[0083] As shown in Figures 14 to 16, the optical imaging lens includes a lens barrel P0 and the following components arranged sequentially from the object side to the image side along the optical axis of the lens barrel P0: a first lens E1, a first spacer P1, a second lens E2, a second spacer P2, a third lens E3, a third spacer P3, a fourth lens E4, a fourth spacer P4, a fifth lens E5, a fifth spacer P5, a sixth lens E6, a sixth spacer P6, and a seventh lens E7.

[0084] As shown in Figure 14, in Embodiment 3-1, the object-side and image-side of the first spacer P1 abut against the image-side S2 of the first lens and the object-side S3 of the second lens, respectively. The object-side and image-side of the second spacer P2 abut against the image-side S4 of the second lens and the object-side S5 of the third lens, respectively. The object-side and image-side of the third spacer P3 abut against the image-side S6 of the third lens and the object-side S7 of the fourth lens, respectively. The object-side and image-side of the fourth spacer P4 abut against the image-side S8 of the fourth lens and the object-side S9 of the fifth lens, respectively. The object-side and image-side of the fifth spacer P5 abut against the image-side S10 of the fifth lens and the object-side S11 of the sixth lens, respectively. The object-side and image-side of the sixth spacer P6 abut against the image-side S12 of the sixth lens and the object-side S13 of the seventh lens, respectively.

[0085] As shown in Figure 15, in Embodiment 3-2, the bearing and contact method of each spacer of the optical imaging lens is the same as that in Embodiment 3-1. Please refer to the relevant description in Embodiment 3-1, which will not be repeated here.

[0086] As shown in Figure 16, in Embodiment 3-3, the bearing and contact method of each spacer of the optical imaging lens is the same as that in Embodiment 3-1. Please refer to the relevant description in Embodiment 3-1, which will not be repeated here.

[0087] In summary, the structural parameters of the optical imaging lens of Embodiment 3 in Embodiments 3-1, 3-2, and 3-3 are shown in Table 7. (Unit: mm) Parameters / Examples 3-1 3-2 3-3 d1s 3.14 3.14 3.09 d1m 3.14 3.14 3.09 D1s 7.44 7.64 6.17 D1m 7.44 7.64 6.17 d2s 1.48 1.48 1.48 d2m 1.48 1.48 1.48 D2s 7.54 7.74 6.23 d3s 2.07 2.24 2.02 D3m 7.64 7.84 5.99 d4s 2.51 2.58 2.58 d4m 2.51 2.58 2.58 d5s 3.20 4.11 4.40 d5m 3.20 4.31 4.31 d6s 4.16 4.57 4.98 D6m 7.94 7.96 7.97 EP45 0.72 0.57 0.57 Table 7

[0088] In Embodiment 3, the object-side surface S1 of the first lens is concave, and the image-side surface S2 of the first lens is concave. The object-side surface S3 of the second lens is convex, and the image-side surface S4 of the second lens is concave. The object-side surface S5 of the third lens is convex, and the image-side surface S6 of the third lens is convex. The object-side surface S7 of the fourth lens is convex, and the image-side surface S8 of the fourth lens is convex. The object-side surface S9 of the fifth lens is concave, and the image-side surface S10 of the fifth lens is convex. The object-side surface S11 of the sixth lens is convex, and the image-side surface S12 of the sixth lens is convex. The object-side surface S13 of the seventh lens is convex, and the image-side surface S14 of the seventh lens is concave.

[0089] In Embodiment 3, the effective focal length of the optical imaging lens is 1.98mm, the effective focal length f1 of the first lens is -3.21mm, the effective focal length f2 of the second lens is 7.59mm, the effective focal length f3 of the third lens is 5.05mm, the effective focal length f4 of the fourth lens is 3.69mm, the effective focal length f5 of the fifth lens is -3.41mm, the effective focal length f6 of the sixth lens is 3.17mm, the effective focal length of the seventh lens is -12.91mm, half of the maximum field of view (Semi-FOV) of the optical imaging lens is 62.27°, and the entrance pupil diameter (EPD) of the optical imaging lens is 1.00mm.

[0090] Table 8 shows the basic structural parameters of the optical imaging lens of Embodiment 3, wherein the units of radius of curvature and thickness / distance are millimeters (mm). Face number Surface type radius of curvature thickness Material Effective radius Refractive index Abbe number OBJ spherical endless endless S1 aspherical -14.1061 0.4000 1.54 56.11 2.8738 S2 aspherical 2.0243 1.0508 1.7211 S3 aspherical 4.1166 0.7666 1.67 19.40 1.4714 S4 aspherical 19.1951 0.5539 1.1329 STO spherical endless 0.0085 0.7441 S5 aspherical 9.5113 0.6379 1.54 56.00 0.7814 S6 aspherical -3.1245 0.2131 0.9744 S7 aspherical 7.2218 0.6952 1.54 56.00 1.1154 S8 aspherical -2.7027 0.0959 1.2411 S9 aspherical -1.4278 0.3000 1.67 19.40 1.2722 S10 aspherical -4.0741 0.4517 1.5002 S11 aspherical 4.5391 0.7619 1.54 56.11 1.8076 S12 aspherical -2.6321 0.2605 1.9672 S13 aspherical 2.2831 0.4969 1.67 19.40 2.2767 S14 aspherical 1.6510 1.2258 2.6784 S15 spherical endless 0.2100 1.52 64.2 6.0500 S16 spherical endless 0.4719 6.0500 S17 spherical endless 0.0000 4.3600 Table 8

[0091] Table 9 below gives the higher-order coefficients A4, A6, A8, A10, A12, A14, A16, A18, A20, A22, A24, A26, A28 and A30 that can be used for each aspherical mirror S1-S14 in Example 3. Face number A4 A6 A8 A10 A12 A14 A16 S1 1.0241E+00 -1.6226E-01 6.3759E-02 -1.6410E-02 7.3153E-03 -2.3925E-03 1.1519E-03 S2 1.5283E-01 -2.8176E-02 2.6355E-03 -1.2613E-03 -1.5054E-03 1.1260E-04 1.0106E-04 S3 6.1233E-03 -5.4528E-03 -6.5342E-03 -9.1381E-04 1.4625E-04 2.0590E-04 5.3207E-05 S4 5.0789E-02 -1.9462E-03 -9.3810E-04 -4.0530E-04 3.4262E-04 -1.2307E-04 7.5756E-05 S5 3.1919E-03 3.9877E-04 -5.3406E-04 1.5949E-04 -1.0788E-04 7.3197E-05 -4.0573E-05 S6 3.3090E-02 7.7986E-04 -2.0687E-03 4.6059E-03 -3.0459E-03 8.8260E-04 -1.8994E-04 S7 -1.5663E-01 1.0581E-02 -2.9067E-03 8.3072E-04 4.3325E-04 7.6492E-04 -1.5544E-04 S8 -9.9689E-02 -2.8103E-02 9.5094E-03 -1.0052E-04 2.5635E-03 8.2519E-04 1.2727E-03 S9 -1.1989E-01 -5.3727E-03 -8.4099E-04 4.6551E-03 1.2781E-03 3.0327E-04 6.5360E-04 S10 1.8272E-02 -1.7212E-03 -8.5561E-03 6.3750E-03 1.6490E-03 1.1186E-03 -1.5045E-03 S11 -4.8043E-01 -1.4103E-02 2.2717E-03 -5.4032E-03 -3.3950E-04 -2.4758E-03 5.1414E-04 S12 1.5017E-01 -5.3166E-02 1.8958E-02 -1.3314E-02 3.5838E-03 -4.3129E-03 2.8585E-03 S13 -1.2033E+00 1.5079E-01 -3.8009E-03 -2.3672E-03 6.9533E-03 -3.9861E-03 5.7022E-03 S14 -2.9346E+00 5.1013E-01 -1.1206E-01 3.7928E-02 -9.7592E-03 3.1089E-03 2.7299E-03 Surface number A18 A20 A22 A24 A26 A28 A30 S1 -6.5848E-04 3.4305E-04 -1.2033E-04 1.7675E-05 1.2618E-05 [[ID=5​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​-2.3398E-05 4.0945E-05 -1.6480E-05 0.0000E+00 0.0000E+00 S5 5.5344E-05 -1.8402E-05 2.6374E-05 -1.0517E-05 0.0000E+00 0.0000E+00 0.0000E+00 S6 -1.3229E-04 -6.1860E-05 -7.8401E-06 -1.4136E-04 -2.7918E-04 -8.5457E-05 0.0000E+00 S7 7.7935E-05 -1.2762E-04 7.2698E-05 -8.6614E-05 2.9255E-05 0.0000E+00 0.0000E+00 S8 -4.1797E-04 -2.0023E-04 -4.1328E-05 -9.1186E-05 -4.6933E-06 2.4851E-05 0.0000E+00 S9 -6.3380E-04 -2.7067E-04 1.3876E-04 -1.5488E-04 7.6249E-05 0.0000E+00 0.0000E+00 S10 -1.2047E-03 -3.7049E-04 -4.9730E-04 2.2383E-04 1.1789E-04 -3.4906E-05 0.0000E+00 S11 -1.2450E-05 4.8510E-05 1.0727E-04 -1.4879E-04 9.5149E-05 0.0000E+00 0.0000E+00 S12 -6.8389E-04 1.9074E-05 7.3455E-05 -2.3307E-04 -1.1309E-04 1.3152E-04 0.0000E+00 S13 -3.5847E-03 1.2567E-04 5.5425E-04 -4.1794E-04 1.2581E-04 0.0000E+00 0.0000E+00 S14 -3.4904E-03 1.4870E-03 -3.5932E-04 8.8238E-05 1.1333E-04 -1.0342E-04 0.0000E+00 Table 9

[0092] Figure 17 shows the on-axis chromatic aberration curve of the optical imaging lens of Embodiment 3, which represents the deviation of the focal point of light of different wavelengths after passing through the optical imaging lens. Figure 18 shows the astigmatism curve of the optical imaging lens of Embodiment 3, which represents the meridional image plane curvature and the sagittal image plane curvature. Figure 19 shows the distortion curve of the optical imaging lens of Embodiment 3, which represents the distortion magnitude corresponding to different field of view angles.

[0093] As can be seen from Figures 17 to 19, the optical imaging lens given in Embodiment 3 can achieve good imaging quality.

[0094] In summary, Examples 1 to 3 respectively satisfy the relationships shown in Table 10. Conditional / Example 1-1 1-2 1-3 2-1 2-2 2-3 3-1 3-2 3-3 EP45 / CT5 2.67 2.40 2.77 3.04 2.44 3.00 2.40 1.90 1.90 R8 / R9 2.00 2.00 2.00 3.78 3.78 3.78 1.89 1.89 1.89 d4s / (f4-f5) 0.26 0.26 0.25 0.28 0.28 0.30 0.35 0.36 0.36 f2 / (d1s-d2s) 6.84 6.84 5.84 7.78 5.96 7.31 4.57 4.57 4.72 (D1m-d1m) / T12 5.54 5.33 3.15 5.08 4.77 3.81 4.09 4.28 2.93 d2s / R4-d2m / R5 0.62 0.62 0.62 0.21 0.21 0.21 -0.08 -0.08 -0.08 (D3m-d3s) / (f4-f3) 11.30 4.25 7.49 3.58 2.15 2.67 -4.11 -4.13 -2.93 d2m / (DT22-DT31) 6.22 6.22 6.22 -17.86 -17.86 -17.86 2.11 2.11 2.11 |D2s-D1s| / (DT12-DT22) 0.05 0.05 0.06 0.05 0.05 0.02 0.09 0.09 0.05 d5s / R10-d4m / R9 0.67 0.24 0.67 0.91 0.65 1.01 0.97 0.80 0.73 (d1s-d2s) / (d3s-d2s) 2.61 0.34 2.90 1.66 0.56 1.83 2.81 2.18 2.98 d5s / DT52-d5m / DT61 0.22 0.35 0.21 0.19 0.22 0.18 0.18 0.18 0.27 d6s / (CT6+CT7) 2.61 2.61 2.61 2.48 2.48 2.53 3.30 3.63 3.96 D1s / D6m+DT11 / DT72 1.94 1.94 1.73 2.04 2.04 1.87 2.01 2.03 1.85 Table 10

[0095] Obviously, the embodiments described above are merely some embodiments of the present invention, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative effort should fall within the scope of protection of the present invention.

[0096] It should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the exemplary embodiments according to this application. As used herein, the singular form is intended to include the plural form as well, unless the context clearly indicates otherwise. Furthermore, it should be understood that when the terms “comprising” and / or “including” are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof.

[0097] It should be noted that the terms "first," "second," etc., in the specification, claims, and accompanying drawings of this application are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate so that the embodiments of this application described herein can be implemented in a sequence other than those illustrated or described herein.

[0098] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention can have various modifications and variations. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention. [Simplified Explanation of the Diagram]

[0020] The accompanying drawings, which form part of this application, are used to provide a further understanding of the invention. The illustrative embodiments of the invention and their descriptions are used to explain the invention and do not constitute an improper limitation of the invention. In the accompanying drawings: Figure 1 shows a dimensioned diagram of an optical imaging lens according to an optional embodiment of the present invention; Figure 2 shows a structural schematic diagram of an optical imaging lens according to Embodiment 1-1 of the present invention; Figure 3 shows a structural schematic diagram of an optical imaging lens according to Embodiment 1-2 of the present invention; Figure 4 shows a structural schematic diagram of an optical imaging lens according to Embodiment 1-3 of the present invention; Figures 5 to 7 show the on-axis chromatic aberration curve, astigmatism curve, and distortion curve of the optical imaging lens according to Embodiment 1 of the present invention, respectively; Figure 8 shows a structural schematic diagram of an optical imaging lens according to Embodiment 2-1 of the present invention; Figure 9 shows a structural schematic diagram of an optical imaging lens according to Embodiment 2-2 of the present invention; Figure 10 shows a structural schematic diagram of an optical imaging lens according to Embodiment 2-3 of the present invention; Figures 11 to 13 show the on-axis chromatic aberration curve, astigmatism curve, and distortion curve of an optical imaging lens according to Embodiment 2 of the present invention, respectively; Figure 14 shows a structural schematic diagram of an optical imaging lens according to Embodiment 3-1 of the present invention; Figure 15 shows a structural schematic diagram of an optical imaging lens according to Embodiment 3-2 of the present invention; Figure 16 shows a structural schematic diagram of an optical imaging lens according to Embodiment 3-3 of the present invention. Figures 17 to 19 show the on-axis chromatic aberration curve, astigmatism curve, and distortion curve of the optical imaging lens of Embodiment 3 of the present invention, respectively; Figure 20 shows the stray light diagram of the optical imaging lens of the present invention when EP45 / CT5=1.9, R8 / R9=1.9, and d4s / (f4-f5)=0.8; Figure 21 shows the stray light diagram of the optical imaging lens of the present invention when EP45 / CT5=1.9, R8 / R9=1.9, and d4s / (f4-f5)=0.36; Figure 22 shows the stray light diagram of the optical imaging lens of the present invention when EP45 / CT5=2.7, R8 / R9=2.0, and d4s / (f4-f5)=0.8; Figure 23 shows the stray light diagram of the optical imaging lens of the present invention when EP45 / CT5=2.7, R8 / R9=2.0, and d4s / (f4-f5)=-0.5; Figure 24 shows a schematic diagram of the internal reflection optical path of a prior art optical imaging lens.

Claims

1. An optical imaging lens, characterized in that it comprises a lens barrel, seven lenses, and a plurality of spacers, wherein the seven lenses and the plurality of spacers are all disposed in the lens barrel, wherein the optical imaging lens comprises seven lenses with refractive power; the seven lenses, from the object side to the image side, sequentially include a first lens with negative optical power, a second lens with positive optical power, a third lens with positive optical power, a fourth lens with positive optical power, a fifth lens with negative optical power, a sixth lens with positive optical power, and a seventh lens with negative optical power, wherein there is an air gap between adjacent lenses from the first lens to the seventh lens; the plurality of spacers includes at least a fourth spacer and a fifth spacer, the fourth spacer being located between the fourth lens and the fifth lens and abutting against the image-side surface of the fourth lens, and the fifth spacer being located between the fifth lens and the sixth lens and abutting against the image-side surface of the fifth lens; The distance EP45 between the image-side surface of the fourth spacer and the object-side surface of the fifth spacer on the optical axis satisfies the following relationship with the center thickness CT5 of the fifth lens: 1 < EP45 / CT5 < 4; the radius of curvature R8 of the image-side surface of the fourth lens satisfies the following relationship with the radius of curvature R9 of the object-side surface of the fifth lens: 1 < R8 / R9 < 4; the inner diameter d4s of the object-side surface of the fourth spacer, the effective focal length f4 of the fourth lens, and the effective focal length f5 of the fifth lens satisfy the following relationship: 0 < d4s / (f4-f5) < 0.

5.

2. The optical imaging lens according to claim 1, wherein the plurality of spacers further includes a first spacer and a second spacer, the first spacer being located between the first lens and the second lens and abutting against the image-side surface portion of the first lens, the second spacer being located between the second lens and the third lens and abutting against the image-side surface portion of the second lens, and the inner diameter d1s of the object-side surface of the first spacer, the inner diameter d2s of the object-side surface of the second spacer, and the effective focal length f2 of the second lens satisfying: 2 < f2 / (d1s-d2s) < 10.

3. The optical imaging lens according to claim 1, wherein the plurality of spacers further includes a first spacer, the first spacer being located between the first lens and the second lens and abutting against the image-side surface portion of the first lens, wherein the inner diameter d1m of the image-side surface of the first spacer, the outer diameter D1m of the image-side surface of the first spacer, and the distance T12 on the optical axis from the image-side surface of the first lens to the object-side surface of the second lens satisfy the following: 2 < (D1m - d1m) / T12 < 6.

4. The optical imaging lens according to claim 1, wherein the plurality of spacers further includes a second spacer, the second spacer being located between the second lens and the third lens and abutting against the image-side surface portion of the second lens, wherein the inner diameter d2s of the object-side surface of the second spacer, the inner diameter d2m of the image-side surface of the second spacer, the radius of curvature R4 of the image-side surface of the second lens, and the radius of curvature R5 of the object-side surface of the third lens satisfy the following: -0.5 < d2s / R4 - d2m / R5 < 1.

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

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

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

1.

8. The optical imaging lens according to claim 1, wherein the inner diameter d5s of the object side of the fifth spacer, the inner diameter d4m of the image side of the fourth spacer, the radius of curvature R9 of the object side of the fifth lens, and the radius of curvature R10 of the image side of the fifth lens satisfy the following: 0 < d5s / R10 - d4m / R9 < 1.

5.

9. The optical imaging lens according to claim 1, wherein the plurality of spacers further comprises a first spacer, a second spacer, and a third spacer, the first spacer being located between the first lens and the second lens and abutting against the image-side surface of the first lens, the second spacer being located between the second lens and the third lens and abutting against the image-side surface of the second lens, the third spacer being located between the third lens and the fourth lens and abutting against the image-side surface of the third lens, wherein the second spacer has the smallest inner diameter among the plurality of spacers; the inner diameter d1s of the object-side surface of the first spacer, the inner diameter d2s of the object-side surface of the second spacer, and the inner diameter d3s of the object-side surface of the third spacer satisfy 0 < (d1s - d2s) / (d3s - d2s) < 3.

10. The optical imaging lens according to claim 1, wherein the inner diameter d5s of the object side of the fifth spacer, the inner diameter d5m of the image side of the fifth spacer, the effective diameter DT52 of the central light-transmitting area of ​​the image side of the fifth lens, and the effective diameter DT61 of the central light-transmitting area of ​​the object side of the sixth lens satisfy the following: 0 < d5s / DT52 - d5m / DT61 ​​< 0.

5.

11. The optical imaging lens according to claim 1, wherein the plurality of spacers further includes a sixth spacer, the sixth spacer being located between the sixth lens and the seventh lens and abutting against the image-side portion of the sixth lens, wherein the inner diameter d6s of the object-side surface of the sixth spacer, the center thickness CT6 of the sixth lens and the center thickness CT7 of the seventh lens satisfy the following: 2 < d6s / (CT6+CT7) < 5.

12. The optical imaging lens according to claim 1, wherein the plurality of spacers further comprises a first spacer and a sixth spacer, the first spacer being located between the first lens and the second lens and abutting against the image-side portion of the first lens, the sixth spacer being located between the sixth lens and the seventh lens and abutting against the image-side portion of the sixth lens, wherein the outer diameter D1s of the object-side surface of the first spacer, the outer diameter D6m of the image-side surface of the sixth spacer, the effective diameter DT11 of the central light-transmitting area of ​​the object-side surface of the first lens, and the effective diameter DT72 of the central light-transmitting area of ​​the image-side surface of the seventh lens satisfy the following: 1.7 < D1s / D6m + DT11 / DT72 < 2.1.

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