Optical imaging lens

Abstract

The present application discloses an optical imaging lens, which sequentially includes, from the object side to the image side along the optical axis: a first lens, a second lens, a third lens, a fourth lens, a fifth lens, a sixth lens, a seventh lens, an eighth lens, and a ninth lens. The first lens has a positive refractive power; the second lens has a negative refractive power; the fourth lens has a positive refractive power; the eighth lens has a positive refractive power; the ninth lens has a negative refractive power; the maximum effective radius of the ninth lens is greater than the maximum effective radius of any one of the first lens to the eighth lens; at least one of the object side surface and the image side surface of each lens from the first lens to the ninth lens is an aspherical mirror surface; and the optical imaging lens can satisfy: -1.7 < f2 / f < 0, f7 / f6 < 0, and (N1 + N2 + N3) / 3 > 1.65.

Description

Technical Field

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

[0002] With the rapid development of electronic devices such as smart phones and tablet computers, manufacturers of electronic devices such as mobile phones have an increasing demand for optical imaging lenses mounted on mobile phones and the like. At the same time, consumers have higher and higher requirements for the imaging characteristics of optical imaging lenses. In order to meet the market demand and to achieve the imaging performance of a large image plane, the chip size of the lens is getting larger and larger. However, although the large image plane characteristics are achieved by increasing the chip size, the larger the image plane, the more serious the marginal aberration, which greatly affects the overall imaging quality of the lens. In addition, if the light is to reach the maximum image plane to reduce the marginal aberration, a large image plane lens needs to have a larger number of lenses, which will greatly increase the volume of the lens.

[0003] Therefore, how to ensure that the optical imaging lens has the characteristics of a large image plane and miniaturization, while also enabling the marginal light to smoothly reach the maximum image plane to reduce the marginal aberration and improve the overall imaging quality of the lens, is one of the difficult problems that many lens designers need to solve urgently at present. Summary of the Invention

[0004] On the one hand, the present application provides such an optical imaging lens, which sequentially includes, along the optical axis from the object side to the image side: a first lens, a second lens, a third lens, a fourth lens, a fifth lens, a sixth lens, a seventh lens, an eighth lens, and a ninth lens. The first lens has a positive refractive power; the second lens has a negative refractive power; the fourth lens has a positive refractive power; the eighth lens has a positive refractive power; the ninth lens has a negative refractive power; the maximum effective radius of the ninth lens is greater than the maximum effective radius of any one of the first lens to the eighth lens; at least one of the object side surface and the image side surface of each of the first lens to the ninth lens is an aspherical mirror surface; and the optical imaging lens can satisfy: -1.7 < f2 / f < 0, f7 / f6 < 0, and (N1 + N2 + N3) / 3 > 1.65, where f is the total effective focal length of the optical imaging lens, f2 is the effective focal length of the second lens, f6 is the effective focal length of the sixth lens, f7 is the effective focal length of the seventh lens, N1 is the refractive index of the first lens, N2 is the refractive index of the second lens, and N3 is the refractive index of the third lens.

[0005] In one embodiment, the optical imaging lens can satisfy: T23 > 0.5 mm and 1.0 < T23 / (CT2 + CT3) < 2.5, where T23 is the air gap between the second lens and the third lens on the optical axis, CT2 is the central thickness of the second lens on the optical axis, and CT3 is the central thickness of the third lens on the optical axis.

[0006] In one embodiment, the optical imaging lens may satisfy: 5.0 < (R4 + R5) / (T23 + CT2) + (R4 - R5) / (T23 + CT3) < 10.0, where R4 is the radius of curvature of the image side of the second lens, R5 is the radius of curvature of the object side of the third lens, T23 is the air gap between the second lens and the third lens on the optical axis, CT2 is the central thickness of the second lens on the optical axis, and CT3 is the central thickness of the third lens on the optical axis.

[0007] In one embodiment, the optical imaging lens may satisfy: SAG91 < -1.5 mm, SAG92 < -0.8 mm, and |SAG91 / R17 + SAG92 / R18| < 0.8, where SAG91 is the distance from the intersection of the object side of the ninth lens and the optical axis to the vertex of the effective radius of the object side of the ninth lens on the optical axis, SAG92 is the distance from the intersection of the image side of the ninth lens and the optical axis to the vertex of the effective radius of the image side of the ninth lens on the optical axis, R17 is the radius of curvature of the object side of the ninth lens, and R18 is the radius of curvature of the image side of the ninth lens.

[0008] In one embodiment, the refractive index of at least one of the first lens to the ninth lens is greater than 1.66.

[0009] In one embodiment, the refractive indices of at least two of the first lens to the ninth lens are greater than 1.66.

[0010] In one embodiment, the optical imaging lens may satisfy: 10.0 < f12 / (CT1 + CT2) < 16.0, where CT1 is the central thickness of the first lens on the optical axis, CT2 is the central thickness of the second lens on the optical axis, and f12 is the combined focal length of the first lens and the second lens.

[0011] In one embodiment, the optical imaging lens may satisfy: 8.0 < f345 / (CT3 + CT4 + CT5) < 15.0, where CT3 is the central thickness of the third lens on the optical axis, CT4 is the central thickness of the fourth lens on the optical axis, CT5 is the central thickness of the fifth lens on the optical axis, and f345 is the combined focal length of the third lens, the fourth lens, and the fifth lens.

[0012] In one embodiment, the radius of curvature of at least one mirror surface from the object side surface of the first lens to the image side surface of the third lens is greater than zero, and R1 / R2 < 1.0, R3 / R4 < 5.0, and R5 / R6 < 3.0, where R1 is the radius of curvature of the object side surface of the first lens, R2 is the radius of curvature of the image side surface of the first lens, R3 is the radius of curvature of the object side surface of the second lens, R4 is the radius of curvature of the image side surface of the second lens, R5 is the radius of curvature of the object side surface of the third lens, and R6 is the radius of curvature of the image side surface of the third lens.

[0013] In one embodiment, the optical imaging lens may satisfy: -3.0 < (R12 + R14 + R16) / f678 < 2.0, where R12 is the radius of curvature of the image side surface of the sixth lens, R14 is the radius of curvature of the image side surface of the seventh lens, R16 is the radius of curvature of the image side surface of the eighth lens, and f678 is the combined focal length of the sixth, seventh, and eighth lenses.

[0014] In one embodiment, the central thickness of the j-th lens among the first lens to the ninth lens on the optical axis is greater than 0.70 mm, and -0.5 < CTj / fj < 0.5, where CTj is the central thickness of the j-th lens on the optical axis and fj is the effective focal length of the j-th lens.

[0015] In one embodiment, the optical imaging lens may satisfy: 1.0 < ImgH / DT92 < 1.5, where ImgH is half of the diagonal length of the effective pixel region on the imaging surface of the optical imaging lens, and DT92 is the maximum effective radius of the image side surface of the ninth lens.

[0016] In one embodiment, the optical imaging lens may satisfy: 0.5 < ∑AT / ∑CT < 1.5, where ∑CT is the sum of the central thicknesses of the first lens to the ninth lens on the optical axis, and ∑AT is the sum of the air gaps between any two adjacent lenses among the first lens to the ninth lens on the optical axis.

[0017] In one embodiment, the optical imaging lens may satisfy: -1.0 < (R14 + R15) / (f7 - f8) < 2.0, where f7 is the effective focal length of the seventh lens, f8 is the effective focal length of the eighth lens, R14 is the radius of curvature of the image side surface of the seventh lens, and R15 is the radius of curvature of the object side surface of the eighth lens.

[0018] In one embodiment, the Abbe number of at least three lenses among the first lens to the ninth lens is less than 40.0.

[0019] In one embodiment, the optical imaging lens may satisfy: 1.0 < |V1 - V3| < 20.0 and V1 / (V2 + V3) < 1.0, where V1 is the Abbe number of the first lens, V2 is the Abbe number of the second lens, and V3 is the Abbe number of the third lens.

[0020] In one embodiment, the optical imaging lens may satisfy: f / |f3 / R6 - f4 / R8 - f5 / R10| < 2.5 mm, where f is the total effective focal length of the optical imaging lens, f3 is the effective focal length of the third lens, f4 is the effective focal length of the fourth lens, f5 is the effective focal length of the fifth lens, R6 is the radius of curvature of the image side of the third lens, R8 is the radius of curvature of the image side of the fourth lens, and R10 is the radius of curvature of the image side of the fifth lens.

[0021] In one embodiment, the optical imaging lens may satisfy: f × tan(FOV / 2) > 7.5 mm, where f is the total effective focal length of the optical imaging lens and FOV is the maximum field of view angle of the optical imaging lens.

[0022] In one embodiment, the optical imaging lens may satisfy: 0 < f / f1 < 2.0, -2.0 < f / f2 < 0, 0 < f / f4 < 1.0, 0 < f / f8 < 2.0, -2.0 < f / f9 < 0, where f is the total effective focal length of the optical imaging lens, f1 is the effective focal length of the first lens, f2 is the effective focal length of the second lens, f4 is the effective focal length of the fourth lens, f8 is the effective focal length of the eighth lens, and f9 is the effective focal length of the ninth lens.

[0023] In one embodiment, the optical imaging lens may satisfy: f / ImgH < 1.5, where f is the total effective focal length of the optical imaging lens and ImgH is half of the diagonal length of the effective pixel region on the imaging surface of the optical imaging lens.

[0024] In one embodiment, the optical imaging lens may satisfy: R1 / R2 > 0, R3 / R4 > 0, and R5 / R6 > 0, where R1 is the radius of curvature of the object side of the first lens, R2 is the radius of curvature of the image side of the first lens, R3 is the radius of curvature of the object side of the second lens, R4 is the radius of curvature of the image side of the second lens, R5 is the radius of curvature of the object side of the third lens, and R6 is the radius of curvature of the image side of the third lens.

[0025] On the other hand, the present application provides an optical imaging lens. The optical imaging lens sequentially includes, from the object side to the image side along the optical axis: a first lens with refractive power, a second lens, a third lens, a fourth lens, a fifth lens, a sixth lens, a seventh lens, an eighth lens, and a ninth lens. The first lens has positive refractive power; the second lens has negative refractive power; the fourth lens has positive refractive power; the eighth lens has positive refractive power; the ninth lens has negative refractive power; the maximum effective radius of the ninth lens is greater than the maximum effective radius of any one of the first lens to the eighth lens; at least one of the object side surface and the image side surface of each lens from the first lens to the ninth lens is an aspherical mirror surface; and the optical imaging lens satisfies: -1.5 < f2 / f < 0, f7 / f6 < 0, and TTL / ImgH < 1.5, where f is the total effective focal length of the optical imaging lens, f2 is the effective focal length of the second lens, f6 is the effective focal length of the sixth lens, f7 is the effective focal length of the seventh lens, TTL is the distance on the optical axis from the object side surface of the first lens to the imaging surface of the optical imaging lens, and ImgH is half of the diagonal length of the effective pixel area on the imaging surface of the optical imaging lens.

[0026] The optical imaging lens satisfies: (N1 + N2 + N3) / 3 > 1.65, where N1 is the refractive index of the first lens, N2 is the refractive index of the second lens, and N3 is the refractive index of the third lens.

[0027] In one embodiment, the optical imaging lens satisfies: T23 > 0.5 mm and 1.0 < T23 / (CT2 + CT3) < 2.5, where T23 is the air gap between the second lens and the third lens on the optical axis, CT2 is the central thickness of the second lens on the optical axis, and CT3 is the central thickness of the third lens on the optical axis.

[0028] In one embodiment, the optical imaging lens satisfies: 5.0 < (R4 + R5) / (T23 + CT2) + (R4 - R5) / (T23 + CT3) < 10.0, where R4 is the radius of curvature of the image side surface of the second lens, R5 is the radius of curvature of the object side surface of the third lens, T23 is the air gap between the second lens and the third lens on the optical axis, CT2 is the central thickness of the second lens on the optical axis, and CT3 is the central thickness of the third lens on the optical axis.

[0029] In one embodiment, the optical imaging lens may satisfy: SAG91 < -1.5 mm, SAG92 < -0.8 mm, and |SAG91 / R17 + SAG92 / R18| < 0.8, where SAG91 is the distance from the intersection of the object side surface of the ninth lens and the optical axis to the vertex of the effective radius of the object side surface of the ninth lens on the optical axis, SAG92 is the distance from the intersection of the image side surface of the ninth lens and the optical axis to the vertex of the effective radius of the image side surface of the ninth lens on the optical axis, R17 is the radius of curvature of the object side surface of the ninth lens, and R18 is the radius of curvature of the image side surface of the ninth lens.

[0030] In one embodiment, the refractive index of at least one lens among the first lens to the ninth lens is greater than 1.66.

[0031] In one embodiment, the refractive indices of at least two lenses among the first lens to the ninth lens are greater than 1.66.

[0032] In one embodiment, the optical imaging lens may satisfy: 10.0 < f12 / (CT1 + CT2) < 16.0, where CT1 is the central thickness of the first lens on the optical axis, CT2 is the central thickness of the second lens on the optical axis, and f12 is the combined focal length of the first lens and the second lens.

[0033] In one embodiment, the optical imaging lens may satisfy: 8.0 < f345 / (CT3 + CT4 + CT5) < 15.0, where CT3 is the central thickness of the third lens on the optical axis, CT4 is the central thickness of the fourth lens on the optical axis, CT5 is the central thickness of the fifth lens on the optical axis, and f345 is the combined focal length of the third lens, the fourth lens, and the fifth lens.

[0034] In one embodiment, the radius of curvature of at least one mirror surface from the object side surface of the first lens to the image side surface of the third lens is greater than zero, and R1 / R2 < 1.0, R3 / R4 < 5.0, and R5 / R6 < 3.0, where R1 is the radius of curvature of the object side surface of the first lens, R2 is the radius of curvature of the image side surface of the first lens, R3 is the radius of curvature of the object side surface of the second lens, R4 is the radius of curvature of the image side surface of the second lens, R5 is the radius of curvature of the object side surface of the third lens, and R6 is the radius of curvature of the image side surface of the third lens.

[0035] In one embodiment, the optical imaging lens may satisfy: -3.0 < (R12 + R14 + R16) / f678 < 2.0, where R12 is the radius of curvature of the image side surface of the sixth lens, R14 is the radius of curvature of the image side surface of the seventh lens, R16 is the radius of curvature of the image side surface of the eighth lens, and f678 is the combined focal length of the sixth lens, the seventh lens, and the eighth lens.

[0036] In one embodiment, the central thickness of the j-th lens among the first lens to the ninth lens on the optical axis is greater than 0.70 mm, and -0.5 < CTj / fj < 0.5, where CTj is the central thickness of the j-th lens on the optical axis, and fj is the effective focal length of the j-th lens.

[0037] In one embodiment, the optical imaging lens can satisfy: 1.0 < ImgH / DT92 < 1.5, where ImgH is half of the diagonal length of the effective pixel area on the imaging surface of the optical imaging lens, and DT92 is the maximum effective radius of the image side of the ninth lens.

[0038] In one embodiment, the optical imaging lens can satisfy: 0.5 < ∑AT / ∑CT < 1.5, where ∑CT is the sum of the central thicknesses of the first lens to the ninth lens on the optical axis, and ∑AT is the sum of the air gaps between any two adjacent lenses among the first lens to the ninth lens on the optical axis.

[0039] In one embodiment, the optical imaging lens can satisfy: -1.0 < (R14 + R15) / (f7 - f8) < 2.0, where f7 is the effective focal length of the seventh lens, f8 is the effective focal length of the eighth lens, R14 is the curvature radius of the image side of the seventh lens, and R15 is the curvature radius of the object side of the eighth lens.

[0040] In one embodiment, the Abbe number of at least three lenses among the first lens to the ninth lens is less than 40.0.

[0041] In one embodiment, the optical imaging lens can satisfy: 1.0 < |V1 - V3| < 20.0 and V1 / (V2 + V3) < 1.0, where V1 is the Abbe number of the first lens, V2 is the Abbe number of the second lens, and V3 is the Abbe number of the third lens.

[0042] In one embodiment, the optical imaging lens can satisfy: f / |f3 / R6 - f4 / R8 - f5 / R10| < 2.5 mm, where f is the total effective focal length of the optical imaging lens, f3 is the effective focal length of the third lens, f4 is the effective focal length of the fourth lens, f5 is the effective focal length of the fifth lens, R6 is the curvature radius of the image side of the third lens, R8 is the curvature radius of the image side of the fourth lens, and R10 is the curvature radius of the image side of the fifth lens.

[0043] In one embodiment, the optical imaging lens can satisfy: f × tan(FOV / 2) > 7.5 mm, where f is the total effective focal length of the optical imaging lens, and FOV is the maximum field of view angle of the optical imaging lens.

[0044] In one embodiment, the optical imaging lens may satisfy: 0 < f / f1 < 2.0, -2.0 < f / f2 < 0, 0 < f / f4 < 1.0, 0 < f / f8 < 2.0, -2.0 < f / f9 < 0, where f is the total effective focal length of the optical imaging lens, f1 is the effective focal length of the first lens, f2 is the effective focal length of the second lens, f4 is the effective focal length of the fourth lens, f8 is the effective focal length of the eighth lens, and f9 is the effective focal length of the ninth lens.

[0045] In one embodiment, the optical imaging lens may satisfy: f / ImgH < 1.5, where f is the total effective focal length of the optical imaging lens, and ImgH is half of the diagonal length of the effective pixel region on the imaging surface of the optical imaging lens.

[0046] In one embodiment, the optical imaging lens may satisfy: R1 / R2 > 0, R3 / R4 > 0, and R5 / R6 > 0, where R1 is the radius of curvature of the object side surface of the first lens, R2 is the radius of curvature of the image side surface of the first lens, R3 is the radius of curvature of the object side surface of the second lens, R4 is the radius of curvature of the image side surface of the second lens, R5 is the radius of curvature of the object side surface of the third lens, and R6 is the radius of curvature of the image side surface of the third lens.

[0047] In an exemplary embodiment of the present application, the present application provides an optical imaging lens with a large image surface. By reasonably matching the refractive power, surface shape, architecture, and technical parameters of each lens, etc., on the basis of ensuring the miniaturization of the lens, it is possible to better balance the aberrations generated by each lens, improve the resolution of the lens, and make the marginal rays reach the maximum image surface more smoothly, which is beneficial to reducing marginal aberrations and improving the overall imaging quality of the lens. For example, in the large image surface optical imaging lens provided in the present application, by setting the maximum effective radius of the ninth lens to be greater than the maximum effective radius of any one of the first lens to the eighth lens, while increasing the imaging range of the lens, the light can reach the maximum image surface more smoothly, so as to reduce marginal aberrations and improve the image quality at the edge of the picture. On this basis, reasonably matching the refractive power of each lens, such as reasonably distributing the refractive power of the first lens, the second lens, the fourth lens, the eighth lens, and the ninth lens, can better balance the aberrations generated by each lens and improve the resolution of the lens. In addition, setting the second lens to have a negative refractive power can not only reduce the ghost images formed by total reflection of the second lens, but also reduce the sensitivity of the second lens. Then, in combination with the sixth lens and the seventh lens with refractive power, such as setting -1.7 < f2 / f < 0, f7 / f6 < 0, it is possible to further balance the aberrations generated by each lens and at the same time is beneficial to improving the resolution of the lens. Further, satisfying (N1 + N2 + N3) / 3 > 1.65 can make the first lens, the second lens, and the third lens have a relatively high refractive index, which can better balance aberrations and is at the same time beneficial to improving the resolution of the lens.

[0048] In another exemplary embodiment of the present application, the present application provides an optical imaging lens with a large image plane. By reasonably matching the refractive power, surface shape, architecture, and technical parameters of each lens, etc., on the basis of ensuring the miniaturization of the lens, it is possible to better balance the aberrations generated by each lens, improve the resolution of the lens, and make the marginal rays reach the maximum image plane more smoothly, which is beneficial to reducing marginal aberrations and improving the overall imaging quality of the lens. For example, in the large-image-plane optical imaging lens provided by the present application, by setting the maximum effective radius of the ninth lens to be greater than the maximum effective radius of any one of the first to eighth lenses, while increasing the imaging range of the lens, the light can reach the maximum image plane more smoothly, so as to reduce marginal aberrations and improve the image quality at the edge of the picture. On this basis, reasonably matching the refractive power of each lens, such as reasonably distributing the refractive power of the first lens, the second lens, the fourth lens, the eighth lens, and the ninth lens, can better balance the aberrations generated by each lens and improve the resolution of the lens. In addition, setting the second lens to have a negative refractive power can not only reduce the ghost images formed by total reflection of the second lens, but also reduce the sensitivity of the second lens. Then, in combination with the sixth lens and the seventh lens with refractive power, such as setting -1.5 < f2 / f < 0 and f7 / f6 < 0, it is possible to further balance the aberrations generated by each lens and at the same time is beneficial to improving the resolution of the lens. Further, satisfying TTL / ImgH < 1.5 can make the overall length of the lens smaller while ensuring a large image plane, and thus is more conducive to realizing the miniaturization of the lens. Description of the Drawings

[0049] By reading the following detailed description of the non-limiting embodiments with reference to the accompanying drawings, other features, objects, and advantages of the present application will become more apparent:

[0050] Figure 1 Fig. shows a schematic structural diagram of an optical imaging lens according to Embodiment 1 of the present application;

[0051] Figures 2A to 2D respectively show the axial chromatic aberration curve, astigmatism curve, distortion curve, and longitudinal chromatic aberration curve of the optical imaging lens of Embodiment 1;

[0052] Figure 3 Fig. shows a schematic structural diagram of an optical imaging lens according to Embodiment 2 of the present application;

[0053] Figures 4A to 4D respectively show the axial chromatic aberration curve, astigmatism curve, distortion curve, and longitudinal chromatic aberration curve of the optical imaging lens of Embodiment 2;

[0054] Figure 5 Fig. shows a schematic structural diagram of an optical imaging lens according to Embodiment 3 of the present application;

[0055] Figures 6A to 6D respectively show the axial chromatic aberration curve, astigmatism curve, distortion curve and longitudinal chromatic aberration curve of the optical imaging lens according to Embodiment 3;

[0056] Figure 7 shows a schematic structural diagram of the optical imaging lens according to Embodiment 4 of the present application;

[0057] Figures 8A to 8D respectively show the axial chromatic aberration curve, astigmatism curve, distortion curve and longitudinal chromatic aberration curve of the optical imaging lens according to Embodiment 4;

[0058] Figure 9 shows a schematic structural diagram of the optical imaging lens according to Embodiment 5 of the present application;

[0059] Figures 10A to 10D respectively show the axial chromatic aberration curve, astigmatism curve, distortion curve and longitudinal chromatic aberration curve of the optical imaging lens according to Embodiment 5;

[0060] Figure 11 shows a schematic structural diagram of the optical imaging lens according to Embodiment 6 of the present application; and

[0061] Figures 12A to 12D respectively show the axial chromatic aberration curve, astigmatism curve, distortion curve and longitudinal chromatic aberration curve of the optical imaging lens according to Embodiment 6. Detailed Embodiments

[0062] To better understand the present application, more detailed descriptions of various aspects of the present application will be made with reference to the accompanying drawings. It should be understood that these detailed descriptions are only descriptions of 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.

[0063] 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.

[0064] In the drawings, for the sake of clarity, 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 for illustrative purposes only and are not drawn to an exact scale.

[0065] In this text, 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 surface of each lens closest to the object being 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.

[0066] It should also be understood that the terms "comprising", "including", "having", "containing" and / or "including with", when used in this specification, indicate the presence of the stated features, elements and / or components, but do not exclude the presence or addition of one or more other features, elements, components and / or combinations thereof. In addition, 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 an individual element in the list. In addition, when describing the embodiments of the present application, the use of "may" means "one or more embodiments of the present application". And the term "exemplary" is intended to refer to an example or illustration.

[0067] Unless otherwise defined, all terms (including technical and scientific terms) used in this text have the same meaning as the ordinary understanding of those 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 formal sense unless explicitly defined as such in this text.

[0068] It should be noted that, without conflict, the embodiments in this application and the features in the embodiments can be combined with each other. The following will refer to the accompanying drawings and combine with embodiments to detail this application.

[0069] The features, principles and other aspects of this application are described in detail below.

[0070] The optical imaging lens according to an exemplary embodiment of the present application may include nine lenses having refractive power, namely, a first lens, a second lens, a third lens, a fourth lens, a fifth lens, a sixth lens, a seventh lens, an eighth lens and a ninth lens. These nine lenses are arranged in sequence along the optical axis from the object side to the image side. An air gap may be provided between any two adjacent lenses among the first lens to the ninth lens. The present application provides an air gap between adjacent lenses, which can ensure that there is no mutual interference phenomenon when each lens is assembled.

[0071] In an exemplary embodiment, the first lens may have a positive refractive power; the second lens may have a negative refractive power; the third lens may have a positive or negative refractive power; the fourth lens may have a positive refractive power; the fifth lens may have a positive or negative refractive power; the sixth lens may have a positive or negative refractive power; the seventh lens may have a positive or negative refractive power; the eighth lens may have a positive refractive power; and the ninth lens may have a negative refractive power.

[0072] In an exemplary embodiment of the present application, the first lens may have a positive refractive power, the second lens may have a negative refractive power, the fourth lens may have a positive refractive power, the eighth lens may have a positive refractive power, and the ninth lens may have a negative refractive power. The maximum effective radius of the ninth lens may be greater than the maximum effective radius of any one of the first lens to the eighth lens. At least one of the object side and the image side of each of the first lens to the ninth lens is an aspherical mirror surface. The optical imaging lens may satisfy: -1.7 < f2 / f < 0, f7 / f6 < 0, and (N1 + N2 + N3) / 3 > 1.65, where f is the total effective focal length of the optical imaging lens, f2 is the effective focal length of the second lens, f6 is the effective focal length of the sixth lens, f7 is the effective focal length of the seventh lens, N1 is the refractive index of the first lens, N2 is the refractive index of the second lens, and N3 is the refractive index of the third lens. The present application provides an optical imaging lens with a large image plane. By reasonably matching the refractive powers, surface types, architectures, and technical parameters of each lens, etc., on the basis of ensuring the miniaturization of the lens, it is possible to better balance the aberrations generated by each lens, improve the resolution of the lens, and make the marginal rays reach the maximum image plane more smoothly, which is beneficial to reducing marginal aberrations and improving the overall imaging quality of the lens. For example, in the optical imaging lens with a large image plane provided in the present application, by setting the maximum effective radius of the ninth lens to be greater than the maximum effective radius of any one of the first lens to the eighth lens, while increasing the imaging range of the lens, the light can reach the maximum image plane more smoothly, so as to reduce marginal aberrations and improve the image quality at the edge of the picture. On this basis, reasonably matching the refractive powers of each lens, such as reasonably distributing the refractive powers of the first lens, the second lens, the fourth lens, the eighth lens, and the ninth lens, can better balance the aberrations generated by each lens and improve the resolution of the lens. In addition, setting the second lens to have a negative refractive power can not only reduce the ghost images formed by total reflection of the second lens, but also reduce the sensitivity of the second lens. Coupled with the sixth lens and the seventh lens with refractive powers, such as setting -1.7 < f2 / f < 0, f7 / f6 < 0, can further balance the aberrations generated by each lens and is beneficial to improving the resolution of the lens. Further, satisfying (N1 + N2 + N3) / 3 > 1.65 can make the first lens, the second lens, and the third lens have a high refractive index, can better balance aberrations, and is beneficial to improving the resolution of the lens.

[0073] In another exemplary embodiment of the present application, the first lens may have a positive refractive power, the second lens may have a negative refractive power, the fourth lens may have a positive refractive power, the eighth lens may have a positive refractive power, and the ninth lens may have a negative refractive power. The maximum effective radius of the ninth lens may be greater than the maximum effective radius of any one of the first lens to the eighth lens. The optical imaging lens, in which at least one of the object side surface and the image side surface of each of the first lens to the ninth lens is an aspherical mirror surface, may satisfy: -1.5 < f2 / f < 0, f7 / f6 < 0, and TTL / ImgH < 1.5, where f is the total effective focal length of the optical imaging lens, f2 is the effective focal length of the second lens, f6 is the effective focal length of the sixth lens, f7 is the effective focal length of the seventh lens, TTL is the distance on the optical axis from the object side surface of the first lens to the imaging surface of the optical imaging lens, and ImgH is half of the diagonal length of the effective pixel region on the imaging surface of the optical imaging lens. The present application provides an optical imaging lens with a large image surface. By reasonably matching the refractive powers, surface types, architectures, and technical parameters of each lens, etc., on the basis of ensuring the miniaturization of the lens, it is possible to better balance the aberrations generated by each lens, improve the resolution of the lens, and make the marginal rays reach the maximum image surface more smoothly, which is beneficial to reducing marginal aberrations and improving the overall imaging quality of the lens. For example, in the optical imaging lens with a large image surface provided by the present application, by setting the maximum effective radius of the ninth lens to be greater than the maximum effective radius of any one of the first lens to the eighth lens, while increasing the imaging range of the lens, the light can reach the maximum image surface more smoothly, so as to reduce marginal aberrations and improve the image quality at the edge of the picture. On this basis, reasonably matching the refractive powers of each lens, such as reasonably distributing the refractive powers of the first lens, the second lens, the fourth lens, the eighth lens, and the ninth lens, can better balance the aberrations generated by each lens and improve the resolution of the lens. In addition, setting the second lens to have a negative refractive power can not only reduce the ghost image formed by total reflection of the second lens, but also reduce the sensitivity of the second lens. Coupled with the sixth lens and the seventh lens with refractive powers, such as setting -1.5 < f2 / f < 0, f7 / f6 < 0, can further balance the aberrations generated by each lens and is beneficial to improving the resolution of the lens. Further, satisfying TTL / ImgH < 1.5 can make the overall length of the lens smaller while ensuring a large image surface, which is further conducive to realizing the miniaturization of the lens.

[0074] In an exemplary embodiment, the optical imaging lens according to the present application may satisfy: T23 > 0.5 mm and 1.0 < T23 / (CT2 + CT3) < 2.5, where T23 is the air gap between the second lens and the third lens on the optical axis, CT2 is the central thickness of the second lens on the optical axis, and CT3 is the central thickness of the third lens on the optical axis. Satisfying T23 > 0.5 mm and 1.0 < T23 / (CT2 + CT3) < 2.5 can make the lens have a smaller field curvature and is conducive to improving the assembly performance of the lens.

[0075] In an exemplary embodiment, the optical imaging lens according to the present application may satisfy: 5.0 < (R4 + R5) / (T23 + CT2) + (R4 - R5) / (T23 + CT3) < 10.0, where R4 is the radius of curvature of the image side of the second lens, R5 is the radius of curvature of the object side of the third lens, T23 is the air gap between the second lens and the third lens on the optical axis, CT2 is the central thickness of the second lens on the optical axis, and CT3 is the central thickness of the third lens on the optical axis. Satisfying 5.0 < (R4 + R5) / (T23 + CT2) + (R4 - R5) / (T23 + CT3) < 10.0 can reasonably control the shapes of the second lens and the third lens and the air gap, which is conducive to making the second lens and the third lens have better processability and is also conducive to improving the overall assembly performance of the lens.

[0076] In an exemplary embodiment, the optical imaging lens according to the present application may satisfy: SAG91 < -1.5 mm, SAG92 < -0.8 mm, and |SAG91 / R17 + SAG92 / R18| < 0.8, where SAG91 is the distance from the intersection of the object side of the ninth lens and the optical axis to the vertex of the effective radius of the object side of the ninth lens on the optical axis, SAG92 is the distance from the intersection of the image side of the ninth lens and the optical axis to the vertex of the effective radius of the image side of the ninth lens on the optical axis, R17 is the radius of curvature of the object side of the ninth lens, and R18 is the radius of curvature of the image side of the ninth lens. Satisfying SAG91 < -1.5 mm, SAG92 < -0.8 mm, and |SAG91 / R17 + SAG92 / R18| < 0.8 can reasonably set the shape of the ninth lens, which is not only conducive to the principal ray of the imaging lens having a smaller incident angle and higher relative illuminance when incident on the imaging surface, but also conducive to reducing the marginal aberration, and is also conducive to making the ninth lens have better processability.

[0077] In an exemplary embodiment, the refractive index of at least one lens among the first lens to the ninth lens may be greater than 1.66. This setting is conducive to having a lens with a high refractive index and a low Abbe number in the lens, and this lens can better balance aberrations and reduce chromatic aberration.

[0078] In an exemplary embodiment, the refractive index of at least two lenses among the first lens to the ninth lens may be greater than 1.66. This setting is conducive to having more lenses with a high refractive index and a low Abbe number in the lens, and these lenses can better balance aberrations and reduce chromatic aberration.

[0079] In an exemplary embodiment, the optical imaging lens according to the present application may satisfy: 10.0 < f12 / (CT1 + CT2) < 16.0, where CT1 is the central thickness of the first lens on the optical axis, CT2 is the central thickness of the second lens on the optical axis, and f12 is the combined focal length of the first lens and the second lens. Satisfying 10.0 < f12 / (CT1 + CT2) < 16.0 can limit the ratio of the combined focal length of the first lens and the second lens to the sum of the central thicknesses of the first lens and the second lens on the optical axis within a certain range, which is conducive to the optical imaging lens better balancing aberrations and at the same time conducive to improving the resolution of the lens.

[0080] In an exemplary embodiment, the optical imaging lens according to the present application may satisfy: 8.0 < f345 / (CT3 + CT4 + CT5) < 15.0, where CT3 is the central thickness of the third lens on the optical axis, CT4 is the central thickness of the fourth lens on the optical axis, CT5 is the central thickness of the fifth lens on the optical axis, and f345 is the combined focal length of the third lens, the fourth lens, and the fifth lens. Satisfying 8.0 < f345 / (CT3 + CT4 + CT5) < 15.0 can limit the ratio of the combined focal length of the third lens, the fourth lens, and the fifth lens to the sum of the central thicknesses of the third lens, the fourth lens, and the fifth lens within a certain range, which is conducive to the optical imaging lens better balancing aberrations and at the same time conducive to improving the resolution of the lens.

[0081] In an exemplary embodiment, the curvature radius of at least one mirror surface from the object side of the first lens to the image side of the third lens is greater than zero, and R1 / R2 < 1.0, R3 / R4 < 5.0, and R5 / R6 < 3.0, where R1 is the curvature radius of the object side of the first lens, R2 is the curvature radius of the image side of the first lens, R3 is the curvature radius of the object side of the second lens, R4 is the curvature radius of the image side of the second lens, R5 is the curvature radius of the object side of the third lens, and R6 is the curvature radius of the image side of the third lens. By reasonably controlling the ratio of the curvature radii of the two surfaces of the first lens, the second lens, and the third lens respectively, the present application helps to improve the stability of lens assembly.

[0082] In an exemplary embodiment, the optical imaging lens according to the present application may satisfy: -3.0 < (R12 + R14 + R16) / f678 < 2.0, where R12 is the radius of curvature of the image side of the sixth lens, R14 is the radius of curvature of the image side of the seventh lens, R16 is the radius of curvature of the image side of the eighth lens, and f678 is the combined focal length of the sixth lens, the seventh lens, and the eighth lens. Satisfying -3.0 < (R12 + R14 + R16) / f678 < 2.0 can limit the ratio of the object-side curvature radii of the sixth lens, the seventh lens, and the eighth lens to the combined focal length of the sixth lens, the seventh lens, and the eighth lens within a certain range, which is helpful for improving the stability of lens assembly and reducing the aberration of the marginal field of view.

[0083] In an exemplary embodiment, the central thickness of the j-th lens among the first lens to the ninth lens on the optical axis is greater than 0.70 mm, and -0.5 < CTj / fj < 0.5, where CTj is the central thickness of the j-th lens on the optical axis and fj is the effective focal length of the j-th lens. For example, in the present application, the central thickness of at least one of the first lens, the fourth lens, the sixth lens, the seventh lens, the eighth lens, and the ninth lens is greater than 0.7 mm, and correspondingly satisfies -0.5 < CTj / fj < 0.5, and j is selected from 1, 4, 6, 7, 8, 9. In other words, in the embodiments provided in the present application, at least one of the following can be satisfied: CT1 > 0.70 mm and -0.5 < CT1 / f1 < 0.5, CT4 > 0.70 mm and -0.5 < CT4 / f4 < 0.5, CT6 > 0.70 mm and -0.5 < CT6 / f6 < 0.5, CT7 > 0.70 mm and -0.5 < CT7 / f7 < 0.5, CT8 > 0.70 mm and -0.5 < CT8 / f8 < 0.5, and CT9 > 0.70 mm and -0.5 < CT9 / f9 < 0.5. By reasonably setting the ratio of the central thickness of the j-th lens to the effective focal length of the lens, the present application is beneficial to making the lens have better processability.

[0084] In an exemplary embodiment, the optical imaging lens according to the present application may satisfy: 1.0 < ImgH / DT92 < 1.5, where ImgH is half of the diagonal length of the effective pixel region on the imaging surface of the optical imaging lens, and DT92 is the maximum effective radius of the image side of the ninth lens. Satisfying 1.0 < ImgH / DT92 < 1.5 can reasonably set the ratio of half of the diagonal length of the effective pixel region on the imaging surface to the maximum effective radius of the image side of the ninth lens within a certain range, which is helpful for improving the stability of lens assembly.

[0085] In an exemplary embodiment, the optical imaging lens according to the present application may satisfy: 0.5 < ∑AT / ∑CT < 1.5, where ∑CT is the sum of the central thicknesses of the first lens to the ninth lens on the optical axis, and ∑AT is the sum of the air gaps between any two adjacent lenses among the first lens to the ninth lens on the optical axis. Satisfying 0.5 < ∑AT / ∑CT < 1.5 can reasonably set the ratio of the sum of the central thicknesses of all lenses to the sum of the air gaps of all lenses within a certain range, which helps to improve the stability of lens assembly.

[0086] In an exemplary embodiment, the optical imaging lens according to the present application may satisfy: -1.0 < (R14 + R15) / (f7 - f8) < 2.0, where f7 is the effective focal length of the seventh lens, f8 is the effective focal length of the eighth lens, R14 is the radius of curvature of the image side of the seventh lens, and R15 is the radius of curvature of the object side of the eighth lens. More specifically, R14, R15, f7, and f8 may further satisfy: -1.0 < (R14 + R15) / (f7 - f8) < 0 and 0 < (R14 + R15) / (f7 - f8) < 2.0. Satisfying -1.0 < (R14 + R15) / (f7 - f8) < 2.0 can limit the ratio of the difference in the effective focal lengths of the seventh lens and the eighth lens to the radius of curvature of the image sides of the seventh lens and the eighth lens within a certain range, which not only helps to improve the process of the seventh lens and the eighth lens but also helps to reduce the aberration of the marginal field of view.

[0087] In an exemplary embodiment, the Abbe number of at least three lenses among the first lens to the ninth lens may be less than 40.0. In the present application, by using a lens material with a smaller Abbe number, the chromatic aberration of the lens can be reduced.

[0088] In an exemplary embodiment, the optical imaging lens according to the present application may satisfy: 1.0 < |V1 - V3| < 20.0 and V1 / (V2 + V3) < 1.0, where V1 is the Abbe number of the first lens, V2 is the Abbe number of the second lens, and V3 is the Abbe number of the third lens. Satisfying 1.0 < |V1 - V3| < 20.0 and V1 / (V2 + V3) < 1.0 can reasonably distribute the dispersion coefficients of the first lens, the second lens, and the third lens, and thus can reduce the chromatic aberration of the optical imaging lens.

[0089] In an exemplary embodiment, the optical imaging lens according to the present application may satisfy: f / |f3 / R6 - f4 / R8 - f5 / R10| < 2.5 mm, where f is the total effective focal length of the optical imaging lens, f3 is the effective focal length of the third lens, f4 is the effective focal length of the fourth lens, f5 is the effective focal length of the fifth lens, R6 is the radius of curvature of the image side of the third lens, R8 is the radius of curvature of the image side of the fourth lens, and R10 is the radius of curvature of the image side of the fifth lens. Satisfying f / |f3 / R6 - f4 / R8 - f5 / R10| < 2.5 mm can reasonably control the shapes and effective focal lengths of the third lens, the fourth lens, and the fifth lens, which is beneficial to better balancing aberrations of the optical imaging lens, improving the resolution of the lens, and improving the processability of the lens.

[0090] In an exemplary embodiment, the optical imaging lens according to the present application may satisfy: f × tan(FOV / 2) > 7.5 mm, where f is the total effective focal length of the optical imaging lens and FOV is the maximum field of view angle of the optical imaging lens. More specifically, f and FOV may further satisfy: f × tan(FOV / 2) > 7.9 mm. Satisfying f × tan(FOV / 2) > 7.5 mm can control the image height of the optical imaging lens within a certain range, such that the optical imaging lens still has a good imaging range with a small volume.

[0091] In an exemplary embodiment, the optical imaging lens according to the present application may satisfy: 0 < f / f1 < 2.0, -2.0 < f / f2 < 0, 0 < f / f4 < 1.0, 0 < f / f8 < 2.0, -2.0 < f / f9 < 0, where f is the total effective focal length of the optical imaging lens, f1 is the effective focal length of the first lens, f2 is the effective focal length of the second lens, f4 is the effective focal length of the fourth lens, f8 is the effective focal length of the eighth lens, and f9 is the effective focal length of the ninth lens. Satisfying 0 < f / f1 < 2.0, -2.0 < f / f2 < 0, 0 < f / f4 < 1.0, 0 < f / f8 < 2.0, -2.0 < f / f9 < 0 can reasonably control the effective focal lengths of the first lens, the second lens, the fourth lens, the eighth lens, and the ninth lens, can control the ghost images formed by total internal reflection of these five lenses, is beneficial to balancing various aberrations, and is also beneficial to reducing the sensitivity of these five lenses.

[0092] In an exemplary embodiment, the optical imaging lens according to the present application may satisfy: f / ImgH < 1.5, where f is the total effective focal length of the optical imaging lens, and ImgH is half of the diagonal length of the effective pixel area on the imaging surface of the optical imaging lens. Satisfying f / ImgH < 1.5 can achieve receiving light with a sufficient imaging area while ensuring that the lens has a wide angle by controlling the ratio of the total effective focal length of the optical imaging lens to half of the diagonal length of the effective pixel area on the imaging surface.

[0093] In an exemplary embodiment, the optical imaging lens according to the present application may satisfy: R1 / R2 > 0, R3 / R4 > 0, and R5 / R6 > 0, where R1 is the curvature radius of the object side surface of the first lens, R2 is the curvature radius of the image side surface of the first lens, R3 is the curvature radius of the object side surface of the second lens, R4 is the curvature radius of the image side surface of the second lens, R5 is the curvature radius of the object side surface of the third lens, and R6 is the curvature radius of the image side surface of the third lens. Satisfying R1 / R2 > 0, R3 / R4 > 0, and R5 / R6 > 0 can reasonably distribute the concavity and convexity of the surfaces of the first lens, the second lens, and the third lens. For example, setting the first lens, the second lens, and the third lens to all have convex-concave surface types is beneficial for the optical imaging lens to better balance aberrations and is also beneficial for improving the resolution of the lens.

[0094] In an exemplary embodiment, the total effective focal length f of the optical imaging lens may be in the range of 8 mm to 12 mm; the effective focal length f1 of the first lens may be in the range of 6 mm to 8 mm; the effective focal length f2 of the second lens may be in the range of -11 mm to -9 mm; the effective focal length f4 of the fourth lens may be in the range of 15 mm to 54 mm; the effective focal length f8 of the eighth lens may be in the range of 10 mm to 22 mm; the effective focal length f9 of the ninth lens may be in the range of -15 mm to -8 mm.

[0095] In an exemplary embodiment, the distance TTL from the object side surface of the first lens to the imaging surface of the optical imaging lens on the optical axis may be in the range of 10 mm to 13 mm; half of the diagonal length of the effective pixel area on the imaging surface of the optical imaging lens, ImgH, may be in the range of 8 mm to 9 mm; half of the maximum field of view angle of the optical imaging lens, Semi-FOV, may be in the range of 36° to 44°; the ratio f / EPD of the total effective focal length f of the optical imaging lens to the entrance pupil diameter EPD of the optical imaging lens may be in the range of 1.4 to 2.2.

[0096] In an exemplary embodiment, the optical imaging lens according to the present application further includes a diaphragm disposed between the object side and the first lens. Optionally, the above optical imaging lens may further include a filter for correcting color deviation and / or a protective glass for protecting the photosensitive element located on the imaging surface. The present application provides an optical imaging lens having characteristics such as miniaturization, a large image plane, small marginal aberration, and high imaging quality. The optical imaging lens according to the above embodiment of the present application may employ multiple lenses, such as the nine lenses described above. By reasonably distributing the refractive power, surface shape, central thickness of each lens, and the axial spacing between each lens, etc., the incident light can be effectively converged, the optical total length of the imaging lens can be reduced, and the processability of the imaging lens can be improved, making the optical imaging lens more conducive to production and processing.

[0097] In an embodiment of the present application, at least one of the lens surfaces of each lens is an aspherical surface, that is, at least one of the object side surface of the first lens to the image side surface of the ninth lens is an aspherical surface. The characteristics of an aspherical lens are that the curvature changes continuously from the center of the lens to the periphery of the lens. Different from a spherical lens with a constant curvature from the center of the lens to the periphery of the lens, an aspherical lens has better curvature radius characteristics and has the advantages of improving distortion aberration and astigmatism aberration. After using an aspherical lens, it is possible to eliminate the aberration that appears during imaging as much as possible, thereby improving the imaging quality. Optionally, at least one of the object side surface and the image side surface of each of the first lens, the second lens, the third lens, the fourth lens, the fifth lens, the sixth lens, the seventh lens, the eighth lens, and the ninth lens is an aspherical surface. Optionally, both the object side surface and the image side surface of each of the first lens, the second lens, the third lens, the fourth lens, the fifth lens, the sixth lens, the seventh lens, the eighth lens, and the ninth lens are aspherical surfaces. Aspherical surfaces can better reduce spherical aberration and field curvature, and can achieve the use effect of replacing multiple spherical lenses with one aspherical lens. Thus, while balancing aberration and improving the resolution of the lens, the number of lenses can also be reduced, making the lens more miniaturized.

[0098] However, those skilled in the art should understand that without departing from the technical solution claimed in the present application, the number of lenses constituting the optical imaging lens can be changed to obtain the various results and advantages described in this specification. For example, although the nine lenses are described as an example in the embodiment, the optical imaging lens is not limited to including nine lenses. If necessary, the optical imaging lens may further include other numbers of lenses.

[0099] The following further describes specific embodiments of the optical imaging lens applicable to the above embodiments with reference to the accompanying drawings.

[0100] Example 1

[0101] The following refers toFigures 1 to 2D Describe the optical imaging lens according to Embodiment 1 of the present application. Figure 1 The structural schematic diagram of the optical imaging lens according to Embodiment 1 of the present application is shown.

[0102] As Figure 1 shown, the optical imaging lens sequentially includes, from the object side to the image side: a stop STO, a first lens E1, a second lens E2, a third lens E3, a fourth lens E4, a fifth lens E5, a sixth lens E6, a seventh lens E7, an eighth lens E8, a ninth lens E9, a filter E10, and an imaging surface S21.

[0103] The first lens E1 has a positive refractive power, its object surface S1 is a convex surface, and its image surface S2 is a concave surface. The second lens E2 has a negative refractive power, its object surface S3 is a convex surface, and its image surface S4 is a concave surface. The third lens E3 has a negative refractive power, its object surface S5 is a convex surface, and its image surface S6 is a concave surface. The fourth lens E4 has a positive refractive power, its object surface S7 is a convex surface, and its image surface S8 is a convex surface. The fifth lens E5 has a positive refractive power, its object surface S9 is a convex surface, and its image surface S10 is a convex surface. The sixth lens E6 has a positive refractive power, its object surface S11 is a convex surface, and its image surface S12 is a convex surface. The seventh lens E7 has a negative refractive power, its object surface S13 is a convex surface, and its image surface S14 is a concave surface. The eighth lens E8 has a positive refractive power, its object surface S15 is a convex surface, and its image surface S16 is a concave surface. The ninth lens E9 has a negative refractive power, its object surface S17 is a convex surface, and its image surface S18 is a concave surface. The filter E10 has an object surface S19 and an image surface S20. The light from the object sequentially passes through the surfaces S1 to S20 and finally forms an image on the imaging surface S21.

[0104] Table 1 shows the basic parameter table of the optical imaging lens of Embodiment 1, where the units of the radius of curvature, thickness / distance, and focal length are all millimeters (mm).

[0105]

[0106]

[0107] Table 1

[0108] In this example, the total effective focal length f of the optical imaging lens is 8.60 mm, the total length TTL of the optical imaging lens (i.e., the distance on the optical axis from the object side surface S1 of the first lens E1 to the imaging surface S21 of the optical imaging lens) is 10.80 mm, half of the diagonal length ImgH of the effective pixel area on the imaging surface S21 of the optical imaging lens is 8.17 mm, half of the maximum field of view angle Semi-FOV of the optical imaging lens is 43.0°, the ratio f / EPD of the total effective focal length f of the optical imaging lens to the entrance pupil diameter EPD of the optical imaging lens is 1.49, the distance SAG91 on the optical axis from the intersection of the object side surface of the ninth lens and the optical axis to the vertex of the effective radius of the object side surface of the ninth lens is -1.88 mm, and the distance SAG92 on the optical axis from the intersection of the image side surface of the ninth lens and the optical axis to the vertex of the effective radius of the image side surface of the ninth lens is -2.15 mm.

[0109] In Embodiment 1, the object side surface and the image side surface of any one of the first lens E1 to the ninth lens E9 are aspherical surfaces, and the surface profile x of each aspherical lens can be defined by, but not limited to, the following aspherical formula:

[0110]

[0111] where x is the sagitta, the distance from the vertex of the aspherical surface at the position with a height of h along the optical axis; c is the paraxial curvature of the aspherical surface, c = 1 / R (i.e., the paraxial curvature c is the reciprocal of the radius of curvature R in Table 1 above); k is the conic coefficient; Ai is the correction coefficient of the i-th order of the aspherical surface. Tables 2-1 and 2-2 below give the higher-order term coefficients A4, A6, A8, A 10 , A 12 , A 14 , A 16 , A 18 , A 20 , A 22 , A 24 , A 26 , A 28 and A 30 .

[0112]

[0113]

[0114] Table 2-1

[0115] Face number A18 A20 A22 A24 A26 A28 A30 S1 6.2840E-06 -9.9188E-07 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 S2 2.9640E-05 -1.7198E-05 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 S3 5.5164E-05 -2.3740E-05 6.6823E-07 3.8975E-06 -1.5712E-06 -1.5550E-06 -1.1448E-06 S4 -1.0900E-05 -2.4974E-06 3.6461E-06 1.0354E-05 8.4824E-06 1.1706E-05 6.7691E-06 S5 2.0505E-06 -1.3286E-05 5.7685E-06 3.0665E-06 6.5282E-06 2.0460E-06 3.7022E-06 S6 1.6890E-07 1.1676E-04 -4.0686E-05 -1.0264E-05 1.2616E-05 -1.0949E-06 -3.3807E-06 S7 5.2372E-05 1.2005E-04 -7.1676E-05 -1.0563E-05 1.2286E-05 -1.4059E-05 -2.7734E-06 S8 -1.1705E-05 -6.4222E-06 -2.2312E-05 -5.3153E-06 -4.2439E-06 5.5197E-06 -4.4587E-06 S9 -6.6150E-05 -7.3099E-05 -3.3084E-05 -6.8637E-06 1.7694E-05 1.4999E-05 1.1666E-05 S10 -5.8905E-05 -7.5244E-05 -3.3439E-05 -5.6006E-06 1.4647E-05 7.3929E-06 2.1488E-06 S11 -1.6370E-04 5.1842E-05 7.2823E-05 -1.8754E-05 -1.4818E-05 -2.4809E-05 1.2676E-05 S12 8.5072E-04 6.3558E-04 -2.8323E-04 -3.7021E-04 -1.1009E-04 1.9061E-05 6.9041E-05 S13 -1.4232E-04 1.0235E-03 9.7293E-06 -1.6745E-04 -2.7548E-04 -1.4959E-04 8.0602E-06 S14 -3.2002E-03 9.3398E-04 -1.9006E-04 5.6571E-04 -2.7634E-04 2.9460E-04 4.7963E-05 S15 -6.7688E-03 -3.7970E-03 1.2438E-03 3.2476E-03 3.1655E-04 -6.5250E-05 -3.3456E-05 S16 -5.7177E-03 9.1651E-04 3.5685E-03 3.5095E-04 -1.6726E-03 3.7553E-04 4.1471E-04 S17 2.1642E-02 -2.6652E-02 1.1021E-02 2.9342E-03 -7.2753E-03 3.9653E-03 -7.3132E-04 S18 2.3120E-02 -1.0127E-02 7.2415E-04 4.4987E-03 -2.2885E-03 -6.3262E-05 -9.1852E-04

[0116] Table 2-2

[0117] Figure 2AThe axial chromatic aberration curve of the optical imaging lens according to Embodiment 1 is shown, which represents the deviation of the focusing points of light rays with different wavelengths after passing through the lens. Figure 2B The astigmatism curve of the optical imaging lens according to Embodiment 1 is shown, which represents the curvature of the meridional image plane and the curvature of the sagittal image plane. Figure 2C The distortion curve of the optical imaging lens according to Embodiment 1 is shown, which represents the distortion magnitude values corresponding to different image heights. Figure 2D The longitudinal chromatic aberration curve of the optical imaging lens according to Embodiment 1 is shown, which represents the deviation of different image heights on the imaging plane after the light rays pass through the lens. According to Figures 2A to 2D it can be seen that the optical imaging lens given in Embodiment 1 can achieve good imaging quality.

[0118] Example 2

[0119] The following refers to Figures 3 to 4D the optical imaging lens according to Embodiment 2 of the present application will be described. In this embodiment and the following embodiments, for the sake of brevity, some descriptions similar to those in Embodiment 1 will be omitted. Figure 3 The structural schematic diagram of the optical imaging lens according to Embodiment 2 of the present application is shown.

[0120] As Figure 3 shown, the optical imaging lens sequentially includes, from the object side to the image side: a diaphragm STO, a first lens E1, a second lens E2, a third lens E3, a fourth lens E4, a fifth lens E5, a sixth lens E6, a seventh lens E7, an eighth lens E8, a ninth lens E9, a filter E10, and an imaging surface S21.

[0121] The first lens E1 has a positive refractive power, its object side surface S1 is a convex surface, and its image side surface S2 is a concave surface. The second lens E2 has a negative refractive power, its object side surface S3 is a convex surface, and its image side surface S4 is a concave surface. The third lens E3 has a positive refractive power, its object side surface S5 is a convex surface, and its image side surface S6 is a concave surface. The fourth lens E4 has a positive refractive power, its object side surface S7 is a concave surface, and its image side surface S8 is a convex surface. The fifth lens E5 has a positive refractive power, its object side surface S9 is a concave surface, and its image side surface S10 is a convex surface. The sixth lens E6 has a positive refractive power, its object side surface S11 is a convex surface, and its image side surface S12 is a convex surface. The seventh lens E7 has a negative refractive power, its object side surface S13 is a convex surface, and its image side surface S14 is a concave surface. The eighth lens E8 has a positive refractive power, its object side surface S15 is a convex surface, and its image side surface S16 is a concave surface. The ninth lens E9 has a negative refractive power, its object side surface S17 is a convex surface, and its image side surface S18 is a concave surface. The filter E10 has an object side surface S19 and an image side surface S20. The light from the object sequentially passes through the surfaces S1 to S20 and finally forms an image on the imaging surface S21.

[0122] In this example, the total effective focal length f of the optical imaging lens is 8.50 mm, the total length TTL of the optical imaging lens is 10.66 mm, half of the diagonal length of the effective pixel area on the imaging surface S21 of the optical imaging lens is ImgH = 8.17 mm, half of the maximum field of view angle of the optical imaging lens is Semi-FOV = 43.0°, the ratio f / EPD of the total effective focal length f of the optical imaging lens to the entrance pupil diameter EPD of the optical imaging lens is 1.49, the distance SAG91 from the intersection of the object side surface of the ninth lens and the optical axis to the vertex of the effective radius on the object side surface of the ninth lens on the optical axis is -1.88 mm, and the distance SAG92 from the intersection of the image side surface of the ninth lens and the optical axis to the vertex of the effective radius on the image side surface of the ninth lens on the optical axis is -1.61 mm.

[0123] Table 3 shows the basic parameter table of the optical imaging lens of Example 2, where the units of the radius of curvature, thickness / distance, and focal length are all millimeters (mm). Tables 4-1 and 4-2 show the higher-order term coefficients of the aspherical mirror surfaces that can be used in Example 2, where each aspherical surface type can be defined by the formula (1) given in the above Example 1.

[0124]

[0125]

[0126] Table 3

[0127] Face number A4 A6 A8 A10 A12 A14 A16 S1 2.3674E-03 -4.0467E-03 -1.5226E-03 -5.7308E-04 -2.0415E-04 -4.2134E-05 -2.1921E-05 S2 7.9393E-02 -1.4748E-02 2.3388E-03 -8.1417E-04 5.0365E-05 -1.5381E-07 -4.0840E-05 S3 -2.2301E-02 9.2101E-03 -1.7047E-03 8.3642E-04 -4.0659E-04 1.9150E-04 -1.1636E-04 S4 -4.4054E-02 2.6979E-02 -1.4193E-03 1.2405E-03 -2.9926E-04 8.3527E-05 -5.6449E-05 S5 -2.2737E-01 -4.9841E-03 4.1962E-03 -1.5427E-04 -6.8355E-04 -9.2287E-05 8.6313E-05 S6 -2.5557E-01 1.6202E-02 7.1357E-03 -1.5176E-03 -9.6651E-04 1.5123E-07 2.1464E-04 S7 -1.5574E-01 3.4637E-02 1.0907E-03 -3.5140E-03 -3.8016E-04 5.9130E-04 1.5641E-04 S8 -3.5806E-01 1.2878E-02 3.5644E-03 2.8576E-04 8.1395E-06 3.0438E-04 6.5041E-05 S9 -5.7528E-01 6.6136E-03 1.2225E-02 3.6794E-03 -2.1713E-04 -1.3323E-04 -4.4614E-04 S10 -6.8344E-01 -4.7899E-02 -7.3296E-04 8.3772E-04 -5.8683E-05 3.9953E-04 1.4043E-04 S11 -7.2527E-01 -9.7396E-02 -2.1258E-04 7.9304E-03 3.8237E-03 -6.1265E-04 3.9999E-04 S12 -7.1489E-01 2.5636E-02 6.4166E-02 6.4276E-03 -1.6997E-03 -9.0997E-03 -9.3046E-05 S13 -1.2820E+00 -2.1854E-01 1.1349E-01 8.9905E-03 1.2215E-02 -7.5221E-03 5.1616E-04 S14 -1.9328E+00 1.0783E-01 1.0724E-01 -6.3839E-03 -4.7147E-04 -2.9979E-03 2.8460E-03 S15 -3.8228E+00 2.8975E-01 -2.1110E-02 7.2049E-02 9.2820E-03 7.2728E-03 -7.3121E-03 S16 -3.8231E+00 5.0189E-01 -5.9441E-02 -4.5931E-02 1.4838E-02 2.0753E-02 -1.3918E-02 S17 -4.4186E+00 2.0501E+00 -9.1328E-01 3.0953E-01 -4.2393E-02 -1.3494E-02 -1.2772E-02 S18 -9.2306E+00 2.1998E+00 -6.7628E-01 3.0396E-01 -1.3600E-01 5.8647E-02 -3.9037E-02

[0128] Table 4-1

[0129]

[0130]

[0131] Table 4-2

[0132] Figure 4A shows the axial chromatic aberration curve of the optical imaging lens of Example 2, which represents the deviation of the convergence points of light rays of different wavelengths after passing through the lens. Figure 4B shows the astigmatism curve of the optical imaging lens of Example 2, which represents the meridional image plane curvature and the sagittal image plane curvature. Figure 4C shows the distortion curve of the optical imaging lens of Example 2, which represents the distortion magnitude values corresponding to different image heights. Figure 4D shows the lateral chromatic aberration curve of the optical imaging lens of Example 2, which represents the deviation of different image heights on the imaging surface after the light rays pass through the lens. According to Figures 4A to 4D It can be seen that the optical imaging lens given in Example 2 can achieve good imaging quality.

[0133] Example 3

[0134] The following refers to Figures 5 to 6D an optical imaging lens according to Embodiment 3 of the present application is described. Figure 5 A schematic structural diagram of an optical imaging lens according to Embodiment 3 of the present application is shown.

[0135] As Figure 5 shown, the optical imaging lens sequentially includes, from the object side to the image side: a diaphragm STO, a first lens E1, a second lens E2, a third lens E3, a fourth lens E4, a fifth lens E5, a sixth lens E6, a seventh lens E7, an eighth lens E8, a ninth lens E9, a filter E10, and an imaging surface S21.

[0136] The first lens E1 has a positive refractive power, its object side surface S1 is a convex surface, and its image side surface S2 is a concave surface. The second lens E2 has a negative refractive power, its object side surface S3 is a convex surface, and its image side surface S4 is a concave surface. The third lens E3 has a positive refractive power, its object side surface S5 is a convex surface, and its image side surface S6 is a concave surface. The fourth lens E4 has a positive refractive power, its object side surface S7 is a convex surface, and its image side surface S8 is a concave surface. The fifth lens E5 has a positive refractive power, its object side surface S9 is a convex surface, and its image side surface S10 is a concave surface. The sixth lens E6 has a positive refractive power, its object side surface S11 is a concave surface, and its image side surface S12 is a convex surface. The seventh lens E7 has a negative refractive power, its object side surface S13 is a concave surface, and its image side surface S14 is a concave surface. The eighth lens E8 has a positive refractive power, its object side surface S15 is a convex surface, and its image side surface S16 is a concave surface. The ninth lens E9 has a negative refractive power, its object side surface S17 is a convex surface, and its image side surface S18 is a concave surface. The filter E10 has an object side surface S19 and an image side surface S20. Light from an object sequentially passes through each surface S1 to S20 and finally forms an image on the imaging surface S21.

[0137] In this example, the total effective focal length f of the optical imaging lens is 8.64 mm, the total length TTL of the optical imaging lens is 10.90 mm, half of the diagonal length of the effective pixel region on the imaging surface S21 of the optical imaging lens is ImgH = 8.17 mm, half of the maximum field of view angle of the optical imaging lens is Semi - FOV = 42.7°, the ratio f / EPD of the total effective focal length f of the optical imaging lens to the entrance pupil diameter EPD of the optical imaging lens is 1.49, the distance SAG91 from the intersection of the object side surface of the ninth lens and the optical axis to the vertex of the effective radius of the object side surface of the ninth lens on the optical axis is -1.80 mm, and the distance SAG92 from the intersection of the image side surface of the ninth lens and the optical axis to the vertex of the effective radius of the image side surface of the ninth lens on the optical axis is -1.55 mm.

[0138] Table 5 shows the basic parameter table of the optical imaging lens of Embodiment 3, where the units of the radius of curvature, thickness / distance, and focal length are all millimeters (mm). Tables 6-1 and 6-2 show the high-order term coefficients of the aspherical mirrors that can be used in Embodiment 3, where each aspherical surface type can be defined by the formula (1) given in Embodiment 1 above.

[0139]

[0140] Table 5

[0141]

[0142]

[0143] Table 6-1

[0144] Face number A18 A20 A22 A24 A26 A28 A30 S1 -1.6198E-05 -1.5082E-05 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 S2 3.6369E-06 -1.5624E-06 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 S3 3.3921E-05 7.2982E-07 3.5246E-06 7.2501E-06 -5.4460E-06 4.0911E-06 -2.1194E-06 S4 3.7696E-06 2.7597E-05 -2.5672E-06 -2.2194E-06 -1.3597E-05 6.4189E-06 6.7070E-07 S5 1.1187E-05 -3.0205E-05 -1.0060E-05 8.8801E-07 8.5976E-06 -3.9825E-06 7.2100E-07 S6 -1.5519E-04 4.3053E-05 -1.5106E-05 -3.8621E-07 1.3763E-05 -2.0660E-06 -1.3370E-06 S7 -1.6101E-04 7.5359E-05 -2.0686E-05 -5.9993E-06 1.3896E-05 -7.9072E-06 -9.6966E-07 S8 -2.4460E-05 -3.1278E-05 -2.6627E-05 -1.3008E-06 3.4600E-06 2.6160E-06 -1.4383E-06 S9 7.4900E-06 5.8515E-06 -3.0588E-06 -7.1815E-06 -4.5901E-06 -2.0348E-06 1.6904E-06 S10 -2.6210E-06 -2.5963E-05 -3.0958E-05 -2.8393E-05 -1.1772E-05 -2.0274E-06 4.3530E-06 S11 -2.1930E-05 2.3150E-05 -4.3357E-05 -2.4812E-05 3.4755E-05 3.6857E-05 2.7258E-05 S12 5.6615E-04 8.7233E-04 -6.9596E-05 -2.7335E-04 -1.8531E-04 -3.0038E-05 1.9009E-05 S13 -2.3378E-04 1.3100E-03 9.3387E-05 -1.3202E-04 -4.0139E-04 -1.2578E-04 1.7909E-05 S14 -2.4468E-03 1.0364E-03 -2.8890E-04 3.8948E-04 -1.8859E-04 4.8203E-04 -4.8194E-05 S15 -9.8370E-03 -3.8725E-03 8.8031E-04 1.8079E-03 -6.9089E-05 9.4085E-05 -2.4498E-05 S16 -3.7593E-03 1.7625E-03 1.8154E-03 -2.6486E-04 -6.3475E-04 7.1984E-04 2.3855E-04 S17 2.1277E-02 -2.2868E-02 9.2483E-03 1.2416E-03 -3.6826E-03 1.7938E-03 -4.0187E-04 S18 2.0617E-02 -1.0245E-02 1.4772E-03 4.9706E-04 -2.2985E-04 2.0451E-04 -1.1098E-04

[0145] Table 6-2

[0146] Figure 6A shows the axial chromatic aberration curve of the optical imaging lens of Embodiment 3, which represents the deviation of the convergence points of light rays of different wavelengths after passing through the lens. Figure 6B 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 6C shows the distortion curve of the optical imaging lens of Embodiment 3, which represents the distortion magnitude values corresponding to different image heights. Figure 6D shows the longitudinal chromatic aberration curve of the optical imaging lens of Embodiment 3, which represents the deviation of different image heights of light rays on the imaging plane after passing through the lens. According to Figures 6A to 6D it can be seen that the optical imaging lens given in Embodiment 3 can achieve good imaging quality.

[0147] Example 4

[0148] The following refers to Figures 7 to 8D to describe the optical imaging lens according to Embodiment 4 of the present application. Figure 7 shows a schematic structural diagram of the optical imaging lens according to Embodiment 4 of the present application.

[0149] As Figure 7 shown, the optical imaging lens sequentially includes, from the object side to the image side: a diaphragm STO, a first lens E1, a second lens E2, a third lens E3, a fourth lens E4, a fifth lens E5, a sixth lens E6, a seventh lens E7, an eighth lens E8, a ninth lens E9, a filter E10, and an imaging surface S21.

[0150] The first lens E1 has a positive refractive power, with its object side S1 being a convex surface and its image side S2 being a concave surface. The second lens E2 has a negative refractive power, with its object side S3 being a convex surface and its image side S4 being a concave surface. The third lens E3 has a negative refractive power, with its object side S5 being a convex surface and its image side S6 being a concave surface. The fourth lens E4 has a positive refractive power, with its object side S7 being a convex surface and its image side S8 being a convex surface. The fifth lens E5 has a negative refractive power, with its object side S9 being a convex surface and its image side S10 being a concave surface. The sixth lens E6 has a positive refractive power, with its object side S11 being a convex surface and its image side S12 being a convex surface. The seventh lens E7 has a negative refractive power, with its object side S13 being a convex surface and its image side S14 being a concave surface. The eighth lens E8 has a positive refractive power, with its object side S15 being a convex surface and its image side S16 being a concave surface. The ninth lens E9 has a negative refractive power, with its object side S17 being a convex surface and its image side S18 being a concave surface. The filter E10 has an object side S19 and an image side S20. Light from the object sequentially passes through the surfaces S1 to S20 and finally forms an image on the imaging surface S21.

[0151] In this example, the total effective focal length f of the optical imaging lens is 8.37 mm, the total length TTL of the optical imaging lens is 10.90 mm, half of the diagonal length of the effective pixel region on the imaging surface S21 of the optical imaging lens is ImgH = 8.17 mm, half of the maximum field of view angle of the optical imaging lens is Semi - FOV = 43.5°, the ratio of the total effective focal length f of the optical imaging lens to the entrance pupil diameter EPD of the optical imaging lens is f / EPD = 1.49, the distance SAG91 from the intersection of the object side of the ninth lens and the optical axis to the vertex of the effective radius of the object side of the ninth lens on the optical axis is - 1.83 mm, and the distance SAG92 from the intersection of the image side of the ninth lens and the optical axis to the vertex of the effective radius of the image side of the ninth lens on the optical axis is - 0.99 mm.

[0152] Table 7 shows the basic parameter table of the optical imaging lens of Example 4, where the units of the radius of curvature, thickness / distance, and focal length are all millimeters (mm). Tables 8 - 1 and 8 - 2 show the higher - order term coefficients of the aspherical mirror surfaces that can be used in Example 4, where each aspherical surface type can be defined by the formula (1) given in the above Example 1.

[0153]

[0154]

[0155] Table 7

[0156] Face number A4 A6 A8 A10 A12 A14 A16 S1 4.9923E-03 -4.8395E-03 -2.3610E-03 -7.1162E-04 -1.2261E-04 4.8009E-05 2.0239E-05 S2 7.2458E-02 -1.5406E-02 3.9232E-03 -9.7269E-04 3.5222E-04 -2.6661E-05 -8.6428E-06 S3 -1.3769E-02 2.8055E-03 2.4624E-03 4.9049E-06 -1.6313E-04 1.1575E-05 -7.9873E-05 S4 -9.8905E-03 2.4748E-02 -2.7539E-04 6.8400E-04 -6.3580E-04 -2.0784E-04 -1.5155E-04 S5 -2.5923E-01 7.9105E-03 1.0676E-03 -9.4469E-05 -6.0115E-04 -1.2865E-04 -8.5840E-05 S6 -3.7038E-01 3.9551E-02 3.5761E-03 -3.9908E-03 -1.8601E-04 6.6248E-04 -1.4483E-04 S7 -1.0915E-01 3.4044E-02 1.0265E-03 -4.9237E-03 7.5564E-04 7.1820E-04 -4.0870E-04 S8 -2.2778E-01 -2.2272E-03 -7.1562E-05 2.8362E-05 -2.8423E-04 -1.2679E-05 -1.1622E-04 S9 -5.2279E-01 2.3744E-02 4.1824E-03 2.4579E-03 3.7232E-04 6.0888E-05 -2.6359E-04 S10 -6.0331E-01 -3.4640E-02 -3.1343E-03 3.9169E-03 2.0351E-03 7.2142E-04 8.5743E-05 S11 -3.5921E-01 -8.7279E-02 -7.4461E-03 3.5589E-03 2.2982E-03 1.0356E-04 -1.9329E-04 S12 -5.0397E-01 -3.5729E-02 2.4267E-02 7.4100E-03 3.7207E-03 -7.3517E-04 -9.9894E-04 S13 -1.1047E+00 -1.8517E-01 2.0316E-02 1.3183E-02 3.6881E-03 1.3927E-03 -9.1687E-04 S14 -1.7141E+00 1.2375E-01 2.6472E-02 1.7293E-02 -9.7026E-03 3.0475E-03 -1.9104E-03 S15 -2.9577E+00 5.8399E-02 -4.3094E-02 2.4337E-02 3.3722E-03 6.3902E-03 4.6276E-04 S16 -2.1112E+00 2.4241E-01 2.7345E-02 -6.3938E-02 8.7838E-03 1.1145E-02 1.1658E-03 S17 -3.4563E+00 1.6552E+00 -6.0915E-01 1.0828E-01 2.6734E-02 -4.2586E-03 -2.1174E-02 S18 -7.8709E+00 1.8745E+00 -5.1170E-01 2.0959E-01 -8.7524E-02 3.0754E-02 -2.2920E-02

[0157] Table 8 - 1

[0158]

[0159]

[0160] Table 8-2

[0161] Figure 8A shows the axial chromatic aberration curve of the optical imaging lens of Embodiment 4, which represents the deviation of the convergence points of light rays with different wavelengths after passing through the lens. Figure 8B shows the astigmatism curve of the optical imaging lens of Embodiment 4, which represents the curvature of the meridional image plane and the curvature of the sagittal image plane. Figure 8C shows the distortion curve of the optical imaging lens of Embodiment 4, which represents the distortion magnitude values corresponding to different image heights. Figure 8D shows the lateral chromatic aberration curve of the optical imaging lens of Embodiment 4, which represents the deviation of different image heights on the imaging plane after the light rays pass through the lens. According to Figures 8A to 8D it can be seen that the optical imaging lens given in Embodiment 4 can achieve good imaging quality.

[0162] Example 5

[0163] The following refers to Figures 9 to 10D describes the optical imaging lens according to Embodiment 5 of the present application. Figure 9 shows a schematic structural diagram of the optical imaging lens according to Embodiment 5 of the present application.

[0164] As Figure 9 shown, the optical imaging lens sequentially includes, from the object side to the image side: a stop STO, a first lens E1, a second lens E2, a third lens E3, a fourth lens E4, a fifth lens E5, a sixth lens E6, a seventh lens E7, an eighth lens E8, a ninth lens E9, a filter E10, and an imaging surface S21.

[0165] The first lens E1 has a positive refractive power, with its object side S1 being a convex surface and its image side S2 being a concave surface. The second lens E2 has a negative refractive power, with its object side S3 being a convex surface and its image side S4 being a concave surface. The third lens E3 has a negative refractive power, with its object side S5 being a convex surface and its image side S6 being a concave surface. The fourth lens E4 has a positive refractive power, with its object side S7 being a convex surface and its image side S8 being a convex surface. The fifth lens E5 has a positive refractive power, with its object side S9 being a convex surface and its image side S10 being a concave surface. The sixth lens E6 has a negative refractive power, with its object side S11 being a concave surface and its image side S12 being a concave surface. The seventh lens E7 has a positive refractive power, with its object side S13 being a convex surface and its image side S14 being a concave surface. The eighth lens E8 has a positive refractive power, with its object side S15 being a convex surface and its image side S16 being a concave surface. The ninth lens E9 has a negative refractive power, with its object side S17 being a convex surface and its image side S18 being a concave surface. The filter E10 has an object side S19 and an image side S20. Light from the object sequentially passes through the surfaces S1 to S20 and finally forms an image on the imaging surface S21.

[0166] In this example, the total effective focal length f of the optical imaging lens is 10.98 mm, the total length TTL of the optical imaging lens is 12.00 mm, half of the diagonal length of the effective pixel region on the imaging surface S21 of the optical imaging lens is ImgH = 8.17 mm, half of the maximum field of view angle of the optical imaging lens is Semi - FOV = 37.3°, the ratio of the total effective focal length f of the optical imaging lens to the entrance pupil diameter EPD of the optical imaging lens is f / EPD = 2.10, the distance SAG91 from the intersection of the object side of the ninth lens and the optical axis to the vertex of the effective radius of the object side of the ninth lens on the optical axis is -1.86 mm, and the distance SAG92 from the intersection of the image side of the ninth lens and the optical axis to the vertex of the effective radius of the image side of the ninth lens on the optical axis is -2.16 mm.

[0167] Table 9 shows the basic parameter table of the optical imaging lens of Example 5, where the units of the radius of curvature, thickness / distance, and focal length are all millimeters (mm). Tables 10 - 1 and 10 - 2 show the higher - order term coefficients that can be used for each aspherical mirror surface in Example 5, where each aspherical surface type can be defined by the formula (1) given in the above Example 1.

[0168]

[0169] Table 9

[0170]

[0171]

[0172] Table 10 - 1

[0173] Face number A18 A20 A22 A24 A26 A28 A30 S1 1.1114E-06 5.8883E-07 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 S2 1.3240E-05 -7.5919E-06 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 S3 2.7788E-05 -1.4525E-05 -2.0454E-06 -3.0668E-07 -2.7053E-07 1.7424E-06 -5.1890E-07 S4 -1.4874E-04 1.6523E-04 -1.0338E-04 8.3612E-05 -5.8598E-05 3.8097E-05 -9.8333E-08 S5 -1.7663E-04 1.9523E-04 -1.8611E-04 1.7436E-04 -1.2975E-04 7.5183E-05 -4.0232E-05 S6 -9.1247E-04 4.2306E-04 -2.7987E-04 1.7468E-04 1.4170E-06 -4.1608E-05 2.2848E-05 S7 -1.2196E-04 1.9392E-05 1.3116E-06 -1.3743E-05 1.4362E-05 1.1494E-05 3.7447E-06 S8 1.1565E-05 3.6011E-05 2.3692E-05 2.1255E-05 1.4626E-05 6.6556E-06 2.6100E-06 S9 7.3770E-05 7.9897E-05 4.0799E-05 2.8265E-05 6.3565E-06 -2.2822E-07 -7.1641E-06 S10 1.6533E-04 9.6981E-05 5.5656E-05 4.8753E-05 2.6605E-05 1.6802E-05 3.5992E-06 S11 -4.7120E-04 6.7227E-05 -3.3368E-05 1.1662E-04 1.4206E-05 3.2124E-05 -2.5693E-06 S12 -2.2838E-05 5.3576E-04 -7.5996E-05 1.1502E-04 -9.3744E-05 1.1976E-05 -3.2165E-05 S13 5.3480E-03 -4.0939E-03 -1.0890E-03 1.2803E-03 -1.3571E-03 4.9749E-04 -1.9897E-04 S14 1.4765E-03 -1.7771E-03 -3.2202E-03 -1.0129E-04 -1.4809E-04 -4.1179E-04 -6.8844E-05 S15 -2.6135E-02 9.5808E-03 -2.1022E-03 -1.6275E-03 2.2745E-03 -1.2747E-03 1.3553E-04 S16 7.8505E-03 -6.7435E-03 6.4973E-03 -7.6045E-04 6.1547E-04 1.4770E-03 -3.8772E-04 S17 2.7127E-02 4.3256E-02 4.2618E-02 3.0216E-02 1.4859E-02 4.7114E-03 7.0123E-04 S18 2.5105E-02 3.9252E-02 4.8364E-02 2.6124E-02 9.5311E-03 8.8852E-03 1.7414E-03

[0174] Table 10-2

[0175] Figure 10A shows the axial chromatic aberration curve of the optical imaging lens of Embodiment 5, which represents the deviation of the convergence points of light rays with different wavelengths after passing through the lens. Figure 10B shows the astigmatism curve of the optical imaging lens of Embodiment 5, which represents the meridional image plane curvature and the sagittal image plane curvature. Figure 10C shows the distortion curve of the optical imaging lens of Embodiment 5, which represents the distortion magnitude values corresponding to different image heights. Figure 10D shows the lateral chromatic aberration curve of the optical imaging lens of Embodiment 5, which represents the deviation of different image heights on the imaging plane after the light rays pass through the lens. According to Figures 10A to 10D it can be seen that the optical imaging lens given in Embodiment 5 can achieve good imaging quality.

[0176] Example 6

[0177] The following refers to Figures 11 to 12D describes the optical imaging lens according to Embodiment 6 of the present application. Figure 11 shows a schematic structural diagram of the optical imaging lens according to Embodiment 6 of the present application.

[0178] As Figure 11 shown, the optical imaging lens sequentially includes, from the object side to the image side: a first lens E1, a second lens E2, a third lens E3, a stop STO, a fourth lens E4, a fifth lens E5, a sixth lens E6, a seventh lens E7, an eighth lens E8, a ninth lens E9, a filter E10, and an imaging surface S21.

[0179] The first lens E1 has a positive refractive power, with its object side S1 being a convex surface and its image side S2 being a concave surface. The second lens E2 has a negative refractive power, with its object side S3 being a convex surface and its image side S4 being a concave surface. The third lens E3 has a negative refractive power, with its object side S5 being a convex surface and its image side S6 being a concave surface. The fourth lens E4 has a positive refractive power, with its object side S7 being a convex surface and its image side S8 being a convex surface. The fifth lens E5 has a positive refractive power, with its object side S9 being a convex surface and its image side S10 being a convex surface. The sixth lens E6 has a negative refractive power, with its object side S11 being a concave surface and its image side S12 being a concave surface. The seventh lens E7 has a positive refractive power, with its object side S13 being a convex surface and its image side S14 being a concave surface. The eighth lens E8 has a positive refractive power, with its object side S15 being a convex surface and its image side S16 being a concave surface. The ninth lens E9 has a negative refractive power, with its object side S17 being a convex surface and its image side S18 being a concave surface. The filter E10 has an object side S19 and an image side S20. Light from the object sequentially passes through the surfaces S1 to S20 and finally forms an image on the imaging surface S21.

[0180] In this example, the total effective focal length f of the optical imaging lens is 10.98 mm, the total length TTL of the optical imaging lens is 12.00 mm, half of the diagonal length of the effective pixel region on the imaging surface S21 of the optical imaging lens is ImgH = 8.17 mm, half of the maximum field of view angle of the optical imaging lens is Semi - FOV = 36.7°, the ratio of the total effective focal length f of the optical imaging lens to the entrance pupil diameter EPD of the optical imaging lens is f / EPD = 2.10, the distance SAG91 from the intersection of the object side of the ninth lens and the optical axis to the vertex of the effective radius of the object side of the ninth lens on the optical axis is -1.69 mm, and the distance SAG92 from the intersection of the image side of the ninth lens and the optical axis to the vertex of the effective radius of the image side of the ninth lens on the optical axis is -2.16 mm.

[0181] Table 11 shows the basic parameter table of the optical imaging lens of Example 6, where the units of the radius of curvature, thickness / distance, and focal length are all millimeters (mm). Tables 12 - 1 and 12 - 2 show the high - order term coefficients of the aspherical mirror surfaces that can be used in Example 6, and each aspherical surface type can be defined by the formula (1) given in the above Example 1.

[0182]

[0183]

[0184] Table 11

[0185] Face number A4 A6 A8 A10 A12 A14 A16 S1 1.9101E-02 6.2548E-04 -3.6310E-04 -1.2180E-04 -7.1507E-05 -3.2656E-05 -1.3902E-07 S2 3.9598E-02 -4.2982E-03 1.3014E-03 -3.0018E-04 -1.0757E-04 1.0406E-04 -3.0506E-05 S3 4.2421E-03 3.7165E-03 4.7753E-04 1.4292E-04 -2.0690E-04 2.5497E-04 -8.5605E-05 S4 4.9297E-02 1.8706E-02 8.7790E-04 6.0003E-04 -8.5427E-05 1.2770E-04 -3.3650E-05 S5 -2.4026E-01 1.0738E-02 3.1492E-04 -6.2513E-04 -1.8581E-04 3.8655E-05 8.1391E-05 S6 -3.6182E-01 3.3468E-02 5.3423E-03 -3.5724E-03 -3.6870E-04 5.3699E-04 1.1764E-04 S7 -9.1389E-02 2.2968E-02 3.2489E-03 -4.9704E-03 4.6205E-04 6.0177E-04 -1.8528E-04 S8 -2.1788E-01 -1.2178E-03 -4.3716E-04 7.4136E-04 1.0119E-04 -3.1053E-04 2.9644E-05 S9 -5.0650E-01 1.6472E-02 8.1971E-03 3.0848E-03 2.1254E-03 3.4051E-04 4.4252E-04 S10 -6.1652E-01 -4.9391E-02 -2.5525E-04 1.7627E-03 2.7341E-03 8.6786E-04 6.0747E-04 S11 -6.6640E-01 -1.0520E-01 -1.0291E-02 6.1267E-03 4.5010E-03 -6.3482E-04 -3.0389E-04 S12 -6.6045E-01 6.2199E-02 3.3228E-02 1.0549E-02 -6.0635E-04 -4.4771E-03 5.6048E-04 S13 -1.2687E+00 -8.3998E-02 6.5867E-02 1.5928E-02 7.6337E-03 -5.1368E-03 4.6708E-04 S14 -1.4807E+00 -1.3348E-01 5.8335E-02 1.5476E-03 1.0529E-02 -6.2285E-03 1.9667E-03 S15 -2.7863E+00 1.5013E-02 2.1748E-02 -7.3256E-03 2.0417E-02 2.8035E-03 3.1344E-03 S16 -3.8961E+00 5.1610E-01 -7.2334E-02 -3.5269E-02 2.3567E-02 1.0612E-03 -4.5694E-03 S17 -3.3216E+00 1.5498E+00 -6.0068E-01 1.6899E-01 -2.2319E-02 1.1110E-02 -2.8765E-02 S18 -8.1629E+00 1.5308E+00 -6.3371E-01 1.3847E-01 -1.1626E-01 3.5124E-02 -4.1428E-02

[0186] Table 12 - 1

[0187]

[0188]

[0189] Table 12-2

[0190] Figure 12A The axial chromatic aberration curve of the optical imaging lens of Example 6 is shown, which represents the deviation of the focusing points of light rays with different wavelengths after passing through the lens. Figure 12B The astigmatism curve of the optical imaging lens of Example 6 is shown, which represents the meridional image plane curvature and the sagittal image plane curvature. Figure 12C The distortion curve of the optical imaging lens of Example 6 is shown, which represents the distortion magnitude values corresponding to different image heights. Figure 12D The lateral chromatic aberration curve of the optical imaging lens of Example 6 is shown, which represents the deviation of different image heights on the imaging plane after the light rays pass through the lens. According to Figures 12A to 12D it can be known that the optical imaging lens given in Example 6 can achieve good imaging quality.

[0191] In summary, Examples 1 to 6 respectively satisfy the relationships shown in Table 13.

[0192]

[0193]

[0194] Table 13

[0195] The present application also provides an imaging device, and its electronic photosensitive element can be a charge-coupled device (CCD) or a complementary metal-oxide-semiconductor element (CMOS). The imaging device can be an independent imaging device such as a digital camera, or an imaging module integrated on a mobile electronic device such as a mobile phone. The imaging device is equipped with the optical imaging lens described above.

[0196] The above description is only the preferred embodiments of the present application and the description of the applied technical principles. Those skilled in the art should understand that the scope of the invention involved in the present application is not limited to the technical solutions formed by the specific combination of the above technical features, and should also cover other technical solutions formed by any combination of the above technical features or their equivalent features without departing from the inventive concept. For example, the technical solutions formed by mutually replacing the above features with the technical features (but not limited to) having similar functions disclosed in the present application.

Claims

1. An optical imaging lens, characterized in that, It sequentially includes, from the object side to the image side along the optical axis: a first lens, a second lens, a third lens, a fourth lens, a fifth lens, a sixth lens, a seventh lens, an eighth lens, and a ninth lens, characterized in that the first lens has a positive refractive power, its object side surface is convex, and its image side surface is concave; the second lens has a negative refractive power, its object side surface is convex, and its image side surface is concave; the object side surface of the third lens is convex, and its image side surface is concave; the fourth lens has a positive refractive power; the image side surface of the seventh lens is concave; the eighth lens has a positive refractive power, its object side surface is convex, and its image side surface is concave; the ninth lens has a negative refractive power, its object side surface is convex, and its image side surface is concave; the third lens has a negative refractive power, the fifth lens has a positive refractive power, and the signs of the refractive powers of the sixth lens and the seventh lens are opposite; or, the sixth lens has a positive refractive power, the seventh lens has a negative refractive power, and the signs of the refractive powers of the third lens and the fifth lens are the same; the maximum effective radius of the ninth lens is greater than the maximum effective radius of any one of the first lens to the eighth lens; at least one of the object side surface and the image side surface of each of the first lens to the ninth lens is an aspherical mirror surface; the number of lenses with refractive power in the optical imaging lens is nine; and the optical imaging lens satisfies: -1.22 ≤ f2 / f ≤ -0.98, -6.41 ≤ f7 / f6 ≤ -0.24, and 1.30 ≤ TTL / ImgH < 1.5, where f is the total effective focal length of the optical imaging lens, f2 is the effective focal length of the second lens, f6 is the effective focal length of the sixth lens, f7 is the effective focal length of the seventh lens, TTL is the distance on the optical axis from the object side surface of the first lens to the imaging surface of the optical imaging lens, and ImgH is half of the diagonal length of the effective pixel region on the imaging surface of the optical imaging lens.

2. The optical imaging lens according to claim 1, wherein the optical imaging lens satisfies: 1.70 ≤ (N1 + N2 + N3) / 3 ≤ 1.73, where N1 is the refractive index of the first lens, N2 is the refractive index of the second lens, and N3 is the refractive index of the third lens.

3. The optical imaging lens according to claim 1, characterized in that, the air gap T23 between the second lens and the third lens on the optical axis is greater than 0.5 mm, and the optical imaging lens satisfies: 1.05 ≤ T23 / (CT2 + CT3) ≤ 2.39, where CT2 is the central thickness of the second lens on the optical axis, and CT3 is the central thickness of the third lens on the optical axis.

4. The optical imaging lens according to claim 1, wherein The optical imaging lens satisfies: 5.16 ≤ (R4 + R5) / (T23 + CT2) + (R4 - R5) / (T23 + CT3) ≤ 8.56, where R4 is the radius of curvature of the image side of the second lens, R5 is the radius of curvature of the object side of the third lens, T23 is the air gap between the second lens and the third lens on the optical axis, CT2 is the central thickness of the second lens on the optical axis, and CT3 is the central thickness of the third lens on the optical axis.

5. The optical imaging lens according to claim 1, wherein The distance SAG91 from the intersection of the object side surface of the ninth lens and the optical axis to the vertex of the effective radius of the object side surface of the ninth lens on the optical axis is less than -1.5 mm, and the distance SAG92 from the intersection of the image side surface of the ninth lens and the optical axis to the vertex of the effective radius of the image side surface of the ninth lens on the optical axis is less than -0.8 mm. The optical imaging lens satisfies: 0.30 ≤ SAG91 / R17 + SAG92 / R18 ≤ 0.60, where R17 is the curvature radius of the object side surface of the ninth lens, and R18 is the curvature radius of the image side surface of the ninth lens.

6. The optical imaging lens according to claim 1, characterized in that, The refractive index of at least one lens among the first lens to the ninth lens is greater than 1.

66.

7. The optical imaging lens according to claim 1, wherein, The refractive indices of at least two lenses among the first lens to the ninth lens are greater than 1.

66.

8. The optical imaging lens according to claim 1, characterized in that, The optical imaging lens satisfies: 10.79 ≤ f12 / (CT1 + CT2) ≤ 15.45, where CT1 is the central thickness of the first lens on the optical axis, CT2 is the central thickness of the second lens on the optical axis, and f12 is the combined focal length of the first lens and the second lens.

9. The optical imaging lens according to claim 1, wherein The optical imaging lens satisfies: 8.60 ≤ f345 / (CT3 + CT4 + CT5) ≤ 14.30, where CT3 is the central thickness of the third lens on the optical axis, CT4 is the central thickness of the fourth lens on the optical axis, CT5 is the central thickness of the fifth lens on the optical axis, and f345 is the combined focal length of the third lens, the fourth lens, and the fifth lens.

10. The optical imaging lens according to claim 1, wherein, The radius of curvature of at least one mirror surface from the object side of the first lens to the image side of the third lens is greater than zero, and 0.24 ≤ R1 / R2 ≤ 0.43, 1.85 ≤ R3 / R4 ≤ 2.66, and 0.37 ≤ R5 / R6 ≤ 1.33, where R1 is the radius of curvature of the object side of the first lens, R2 is the radius of curvature of the image side of the first lens, R3 is the radius of curvature of the object side of the second lens, R4 is the radius of curvature of the image side of the second lens, R5 is the radius of curvature of the object side of the third lens, and R6 is the radius of curvature of the image side of the third lens.

11. The optical imaging lens according to claim 1, characterized in that, The optical imaging lens satisfies: -2.76 ≤ (R12 + R14 + R16) / f678 ≤ 1.37, where R12 is the radius of curvature of the image side of the sixth lens, R14 is the radius of curvature of the image side of the seventh lens, R16 is the radius of curvature of the image side of the eighth lens, and f678 is the combined focal length of the sixth lens, the seventh lens, and the eighth lens.

12. The optical imaging lens according to claim 1, wherein The central thickness of the j-th lens among the first lens to the ninth lens on the optical axis is greater than 0.70 mm, and -0.09 ≤ CTj / fj ≤ 0.18, where CTj is the central thickness of the j-th lens on the optical axis and fj is the effective focal length of the j-th lens.

13. The optical imaging lens according to claim 1, characterized in that, The optical imaging lens satisfies: 1.23 ≤ ImgH / DT92 ≤ 1.32, where DT92 is the maximum effective radius of the image side of the ninth lens.

14. The optical imaging lens according to claim 1, characterized in that, The optical imaging lens satisfies: 0.61 ≤ ∑AT / ∑CT ≤ 0.93, where ∑CT is the sum of the central thicknesses of the first lens to the ninth lens on the optical axis, and ∑AT is the sum of the air gaps between any two adjacent lenses among the first lens to the ninth lens on the optical axis.

15. The optical imaging lens according to claim 1, characterized in that, The optical imaging lens satisfies: -0.61 ≤ (R14 + R15) / (f7 - f8) < 2.0, where f8 is the effective focal length of the eighth lens, R14 is the curvature radius of the image side of the seventh lens, and R15 is the curvature radius of the object side of the eighth lens.

16. The optical imaging lens according to claim 1, wherein The Abbe number of at least three lenses among the first lens to the ninth lens is less than 40.

0.

17. The optical imaging lens according to claim 1, wherein The optical imaging lens satisfies: 2.60 ≤ V1 - V3 ≤ 17.10 and 0.71 ≤ V1 / (V2 + V3) ≤ 0.95, where V1 is the Abbe number of the first lens, V2 is the Abbe number of the second lens, and V3 is the Abbe number of the third lens.

18. The optical imaging lens according to claim 1, wherein The optical imaging lens satisfies: 0.60 mm ≤ f / f3 / R6 - f4 / R8 - f5 / R10 ≤ 2.07 mm, where f3 is the effective focal length of the third lens, f4 is the effective focal length of the fourth lens, f5 is the effective focal length of the fifth lens, R6 is the radius of curvature of the image side of the third lens, R8 is the radius of curvature of the image side of the fourth lens, and R10 is the radius of curvature of the image side of the fifth lens.

19. The optical imaging lens according to any one of claims 1-18, characterized in that, The optical imaging lens satisfies: 7.9 mm < f × tan(FOV / 2) ≤ 8.37 mm, where FOV is the maximum field of view angle of the optical imaging lens.

20. The optical imaging lens according to any one of claims 1-18, characterized in that, The optical imaging lens satisfies: 1.19 ≤ f / f1 ≤ 1.54, -1.02 ≤ f / f2 ≤ -0.82, 0.16 ≤ f / f4 ≤ 0.73, 0.52 ≤ f / f8 ≤ 0.86, -1.04 ≤ f / f9 ≤ -0.78, where f1 is the effective focal length of the first lens, f4 is the effective focal length of the fourth lens, f8 is the effective focal length of the eighth lens, and f9 is the effective focal length of the ninth lens.

21. The optical imaging lens according to any one of claims 1-18, characterized in that, The optical imaging lens satisfies: 1.03 ≤ f / ImgH ≤ 1.34.

Images