Optical imaging lens

Abstract

The present application discloses an optical imaging lens, which sequentially includes 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 with optical power along the optical axis from the object side to the image side. The second lens has a negative optical power; the object side surface of the ninth lens is convex. Among them, the optical imaging lens satisfies: -2.0 < f9 / (R17 - R18) < -1.6, where f9 is the effective focal length of the ninth lens, 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.

Description

Technical Field

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

[0002] In recent years, with the development of science and technology, people's requirements for mobile phone lenses have become increasingly high, and mobile phone lenses with high imaging quality have been increasingly favored. However, due to the gradual trend of portable electronic products towards miniaturization, the total length requirements for camera lenses have become increasingly strict, which reduces the design freedom of the lenses and increases the design difficulty. In order to meet the requirements of miniaturization, the F-number of mobile phone imaging lenses is basically above 2.0, and the performance indicators of imaging systems with an F-number below 2.0 will deteriorate, and the aberration will also increase, making it difficult to meet the system requirements. Therefore, how to obtain high imaging quality and small aberration under current conditions has also become a bottleneck that is difficult to break through for imaging lenses. Summary of the Invention

[0003] On the one hand, this application provides an optical imaging lens, which sequentially includes 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 with optical power along the optical axis from the object side to the image side. The second lens has a negative optical power; the object side surface of the ninth lens is convex. Among them, the optical imaging lens satisfies: -2.0 < f9 / (R17 - R18) < -1.6, where f9 is the effective focal length of the ninth lens, 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.

[0004] In one embodiment, at least one of the mirror surfaces from the object side surface of the first lens to the image side surface of the ninth lens is an aspherical mirror surface.

[0005] In one embodiment, the optical imaging lens satisfies: TTL / ImgH < 1.3, where 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.

[0006] In one embodiment, the optical imaging lens satisfies: f / EPD < 1.9, where f is the effective focal length of the optical imaging lens, and EPD is the entrance pupil diameter of the optical imaging lens.

[0007] In one embodiment, the optical imaging lens satisfies: -1.2 < f12 / f2 < -0.6, where f12 is the combined focal length of the first lens and the second lens, and f2 is the effective focal length of the second lens.

[0008] In one embodiment, the optical imaging lens satisfies: 0.8 < (f1 + f8) / f3 < 1.2, where f1 is the effective focal length of the first lens, f3 is the effective focal length of the third lens, and f8 is the effective focal length of the eighth lens.

[0009] In one embodiment, the optical imaging lens satisfies: 7.0 mm < ImgH, where ImgH is half of the diagonal length of the effective pixel region on the imaging surface of the optical imaging lens.

[0010] In one embodiment, the optical imaging lens satisfies: 0.4 < R10 / R9 < 1.2, where R9 is the curvature radius of the object side surface of the fifth lens, and R10 is the curvature radius of the image side surface of the fifth lens.

[0011] In one embodiment, the optical imaging lens satisfies: 1.2 < R5 / (R6 - R5) < 1.8, where 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.

[0012] In one embodiment, the optical imaging lens satisfies: 1.0 < f * tan(Semi - FOV) / ∑CT < 1.5, where f is the effective focal length of the optical imaging lens, Semi - FOV is the maximum half - field of view angle of the optical imaging lens, and ∑CT is the sum of the central thicknesses of the first lens to the ninth lens on the optical axis respectively.

[0013] In one embodiment, the optical imaging lens satisfies: 0.5 < CT8 / CT9 < 1.2, where CT8 is the central thickness of the eighth lens on the optical axis, and CT9 is the central thickness of the ninth lens on the optical axis.

[0014] In one embodiment, the optical imaging lens satisfies: 0.5 < (CT1 + CT2 + CT3) / DT11 < 1.0, 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, CT3 is the central thickness of the third lens on the optical axis, and DT11 is the effective semi - aperture of the object side surface of the first lens.

[0015] In one embodiment, the optical imaging lens satisfies: 0.6 < EPD / DT91 < 1.2, where EPD is the entrance pupil diameter of the optical imaging lens, and DT91 is the effective semi - aperture of the object side surface of the ninth lens.

[0016] In one embodiment, the optical imaging lens satisfies: 0.7 < (SAG31 - SAG32) / SAG32 < 1.5, where SAG31 is the axial distance between the intersection of the object side surface of the third lens and the optical axis and the vertex of the effective radius of the object side surface of the third lens, and SAG32 is the axial distance between the intersection of the image side surface of the third lens and the optical axis and the vertex of the effective radius of the image side surface of the third lens.

[0017] In one embodiment, the optical imaging lens satisfies: 0.6 < SAG92 / SAG91 < 1.2, where SAG91 is the axial distance between the intersection of the object side surface of the ninth lens and the optical axis and the vertex of the effective radius of the object side surface of the ninth lens, and SAG92 is the axial distance between the intersection of the image side surface of the ninth lens and the optical axis and the vertex of the effective radius of the image side surface of the ninth lens.

[0018] In one embodiment, the optical imaging lens satisfies: 0.3 < ET1 / ET2 < 1.1, where ET1 is the edge thickness of the first lens and ET2 is the edge thickness of the second lens.

[0019] In one embodiment, the optical imaging lens satisfies: -2.0 < f2 / f1 < -1.5, where f1 is the effective focal length of the first lens and f2 is the effective focal length of the second lens.

[0020] In one embodiment, the optical imaging lens satisfies: 2.5 < R17 / R18 < 3.0, where 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.

[0021] This application adopts a nine-lens architecture. By reasonably controlling the ratio of the effective focal length of the ninth lens to the difference in the radii of curvature of the object side surface and the image side surface of the ninth lens, the astigmatism of the optical imaging system can be effectively controlled, and thus the imaging quality of the off-axis field can be improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Other features, objects, and advantages of this application will become more apparent by reading the detailed description of the non-limiting embodiments with reference to the following drawings:

[0023] Figure 1 shows a schematic structural diagram of an optical imaging lens according to Embodiment 1 of this application;

[0024] Figures 2A to 2D respectively show the axial chromatic aberration curve, astigmatism curve, distortion curve, and lateral chromatic aberration curve of the optical imaging lens of Embodiment 1;

[0025] Figure 3Shows a schematic structural diagram of an optical imaging lens according to Embodiment 2 of the present application;

[0026] Figures 4A to 4D Respectively show the axial chromatic aberration curve, astigmatism curve, distortion curve, and lateral chromatic aberration curve of the optical imaging lens of Embodiment 2;

[0027] Figure 5 Shows a schematic structural diagram of an optical imaging lens according to Embodiment 3 of the present application;

[0028] Figures 6A to 6D Respectively show the axial chromatic aberration curve, astigmatism curve, distortion curve, and lateral chromatic aberration curve of the optical imaging lens of Embodiment 3;

[0029] Figure 7 Shows a schematic structural diagram of an optical imaging lens according to Embodiment 4 of the present application;

[0030] Figures 8A to 8D Respectively show the axial chromatic aberration curve, astigmatism curve, distortion curve, and lateral chromatic aberration curve of the optical imaging lens of Embodiment 4;

[0031] Figure 9 Shows a schematic structural diagram of an optical imaging lens according to Embodiment 5 of the present application;

[0032] Figures 10A to 10D Respectively show the axial chromatic aberration curve, astigmatism curve, distortion curve, and lateral chromatic aberration curve of the optical imaging lens of Embodiment 5;

[0033] Figure 11 Shows a schematic structural diagram of an optical imaging lens according to Embodiment 6 of the present application; and

[0034] Figures 12A to 12D Respectively show the axial chromatic aberration curve, astigmatism curve, distortion curve, and lateral chromatic aberration curve of the optical imaging lens of Embodiment 6. Detailed implementation manners

[0035] 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 the exemplary embodiments of the present application and do not limit the scope of the present application in any way. Throughout the specification, the same reference numerals refer to the same elements. The expression "and / or" includes any and all combinations of one or more of the associated listed items.

[0036] 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 features. 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.

[0037] In the drawings, for ease of explanation, the thickness, dimensions, and shape of the lens have been slightly exaggerated. Specifically, the spherical or aspherical shapes shown in the drawings are presented by way of example. That is, the spherical or aspherical shapes are not limited to those shown in the drawings. The drawings are for illustrative purposes only and are not drawn to an exact scale.

[0038] In this document, 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.

[0039] It should also be understood that the terms "comprises", "comprising", "has", "including", and / or "including having", when used in this specification, denote the presence of the stated features, elements, and / or components, but do not preclude the presence or addition of one or more other features, elements, components, and / or combinations thereof. 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 individual elements in the list. Further, when describing embodiments of the present application, the use of "may" means "one or more embodiments of the present application". And the term "exemplary" is intended to refer to an example or illustration.

[0040] Unless otherwise defined, all terms (including technical and scientific terms) used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains. 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 expressly so defined herein.

[0041] It should be noted that, without conflict, the embodiments and features in the embodiments of this application may be combined with each other. The following will detail this application with reference to the drawings and in combination with embodiments.

[0042] The features, principles, and other aspects of this application are described in detail below.

[0043] The optical imaging lens according to an exemplary embodiment of the present application may include nine lenses with optical 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. There may be a spacing distance between any two adjacent lenses among the first lens to the ninth lens.

[0044] In the exemplary embodiment, the second lens may have a negative optical power; each of the first lens and the third lens to the ninth lens may have a positive optical power or a negative optical power; the object side surface of the ninth lens is a convex surface. The optical imaging lens according to the present application satisfies: -2.0 < f9 / (R17 - R18) < -1.6, where f9 is the effective focal length of the ninth lens, 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. By constraining the ratio of the effective focal length of the ninth lens and the difference between the curvature radii of the object side surface and the image side surface of the ninth lens, the astigmatism of the system can be effectively controlled, and thus the imaging quality of the off-axis field of view can be improved. More specifically, the ratio of f9 to the difference between R17 and R18 further satisfies: -1.8 < f9 / (R17 - R18) < -1.6.

[0045] In the exemplary embodiment, the optical imaging lens according to the present application satisfies: TTL / ImgH < 1.3, where 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. By controlling the ratio of TTL and ImgH within a reasonable range, the optical imaging lens can have characteristics such as a super-large image surface, ultra-thinning, and high-quality imaging. More specifically, the ratio of TTL and ImgH further satisfies: 1.0 < TTL / ImgH < 1.3.

[0046] In the exemplary embodiment, the optical imaging lens according to the present application satisfies: f / EPD < 1.9, where f is the effective focal length of the optical imaging lens, and EPD is the entrance pupil diameter of the optical imaging lens. By controlling the ratio of the effective focal length f of the optical imaging lens and its entrance pupil diameter EPD within a reasonable range, it can be ensured that during the process of increasing the light passing amount, the lens has the advantage of a large aperture, and at the same time, the illuminance of the imaging surface can be enhanced, thereby improving the imaging effect of the lens in a dark environment.

[0047] In an exemplary embodiment, the optical imaging lens according to the present application satisfies: -1.2 < f12 / f2 < -0.6, where f12 is the combined focal length of the first lens and the second lens, and f2 is the effective focal length of the second lens. By reasonably controlling the ratio of the combined focal length of the first lens and the second lens to the effective focal length of the second lens, the optical power of the system can be reasonably distributed, so that the positive and negative spherical aberrations cancel each other out. More specifically, f12 and f2 further satisfy: -1.0 < f12 / f2 < -0.7.

[0048] In an exemplary embodiment, the optical imaging lens according to the present application satisfies: 0.8 < (f1 + f8) / f3 < 1.2, where f1 is the effective focal length of the first lens, f3 is the effective focal length of the third lens, and f8 is the effective focal length of the eighth lens. By reasonably controlling the ratio of the sum of the effective focal lengths of the first lens and the eighth lens to the effective focal length of the third lens, the optical power of the system can be reasonably distributed, so that the system has good imaging quality and effectively reduces the sensitivity of the system. More specifically, the sum of f1 and f8 and f3 further satisfy: -0.9 < (f1 + f8) / f3 < 1.1.

[0049] In an exemplary embodiment, the optical imaging lens according to the present application satisfies: 7.0 mm < ImgH, where Imgh is half of the diagonal length of the effective pixel region on the imaging surface of the imaging lens. By reasonably controlling the value range of ImgH, the imaging effect of the lens can be improved. Specifically, ImgH further satisfies: 7.0 mm < ImgH < 8.5 mm.

[0050] In an exemplary embodiment, the optical imaging lens according to the present application satisfies: 0.4 < R10 / R9 < 1.2, where R9 is the curvature radius of the object side surface of the fifth lens, and R10 is the curvature radius of the image side surface of the fifth lens. By controlling the ratio of the curvature radius of the object side surface and the image side surface of the fifth lens within a reasonable range, the deflection angle of the system light beam in the fifth lens can be effectively controlled, the sensitivity of the system can be effectively reduced, and good processing characteristics can be achieved. More specifically, R10 and R9 further satisfy: 0.6 < R10 / R9 < 1.0.

[0051] In an exemplary embodiment, the optical imaging lens according to the present application satisfies: 1.2 < R5 / (R6 - R5) < 1.8, where 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. By controlling the ratio of the curvature radius of the object side surface of the third lens to the difference between the curvature radii of the object side surface and the image side surface of the third lens within a certain range, the deflection angle of the system light beam in the third lens can be effectively controlled, the sensitivity of the system can be effectively reduced, and good processing characteristics can be achieved. More specifically, the difference between R6 and R5 and R5 further satisfy: 1.3 < R5 / (R6 - R5) < 1.6.

[0052] In an exemplary embodiment, the optical imaging lens according to the present application satisfies: 1.0 < f * tan(Semi-FOV) / ∑CT < 1.5, where f is the effective focal length of the optical imaging lens, Semi-FOV is the maximum semi-field angle of the optical imaging lens, and ∑CT is the sum of the central thicknesses of the first lens to the ninth lens on the optical axis. By controlling the ratio of the product of the effective focal length of the optical imaging lens and the tangent trigonometric function of its maximum semi-field angle to the above-mentioned sum of thicknesses within a reasonable range, it can be ensured that the imaging lens has a sufficient image plane and the imaging system is miniaturized as much as possible. Further, f, Semi-FOV, and ∑CT may satisfy: 1.1 < f * tan(Semi-FOV) / ∑CT < 1.3.

[0053] In an exemplary embodiment, the optical imaging lens according to the present application satisfies: 0.5 < CT8 / CT9 < 1.2, where CT8 is the central thickness of the eighth lens on the optical axis and CT9 is the central thickness of the ninth lens on the optical axis. Controlling the ratio of the thicknesses of the eighth and ninth lenses on the optical axis within a reasonable range can effectively compensate and balance the lenses with each other and reduce the aberration of the entire system. More specifically, the ratio of CT8 and CT9 may satisfy: 0.9 < CT8 / CT9 < 1.2.

[0054] In an exemplary embodiment, the optical imaging lens according to the present application satisfies: 0.5 < (CT1 + CT2 + CT3) / DT11 < 1.0, 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, CT3 is the central thickness of the third lens on the optical axis, and DT11 is the effective semi-aperture of the object side of the first lens. Controlling the ratio of the sum of the central thicknesses of the first, second, and third lenses on the optical axis to the effective semi-aperture of the object side of a lens within a reasonable range can effectively control the step difference of the first three lenses, make the light transition smoothly, and greatly improve the processability of the imaging lens. More specifically, the sum of CT1, CT2, and CT3 and DT11 may satisfy: 0.6 < (CT1 + CT2 + CT3) / DT11 < 0.8.

[0055] In an exemplary embodiment, the optical imaging lens according to the present application satisfies: 0.6 < EPD / DT91 < 1.2, where EPD is the entrance pupil diameter of the optical imaging lens and DT91 is the effective semi-aperture of the object side of the ninth lens. Controlling the ratio of the entrance pupil diameter of the optical imaging lens to the effective semi-aperture of the object side of the ninth lens within a reasonable range can effectively control the step difference of the entire lens, make the light transition smoothly, and greatly improve the processability. More specifically, the ratio of EPD and DT91 may satisfy: 0.7 < EPD / DT91 < 1.1.

[0056] In an exemplary embodiment, the optical imaging lens according to the present application satisfies: 0.7 < (SAG31 - SAG32) / SAG32 < 1.5, where SAG31 is the axial distance between the intersection of the object side surface of the third lens and the optical axis and the vertex of the effective radius of the object side surface of the third lens, and SAG32 is the axial distance between the intersection of the image side surface of the third lens and the optical axis and the vertex of the effective radius of the image side surface of the third lens. Controlling the ratio of the difference between SAG31 and SAG32 to SAG32 within a reasonable range is beneficial to better balance the realization of miniaturization of the module. More specifically, the ratio of the difference between SAG31 and SAG32 to SAG32 satisfies: 0.85 < (SAG31 - SAG32) / SAG32 < 1.2.

[0057] In an exemplary embodiment, the optical imaging lens according to the present application satisfies: 0.6 < SAG92 / SAG91 < 1.2, where SAG91 is the axial distance between the intersection of the object side surface of the ninth lens and the optical axis and the vertex of the effective radius of the object side surface of the ninth lens, and SAG92 is the axial distance between the intersection of the image side surface of the ninth lens and the optical axis and the vertex of the effective radius of the image side surface of the ninth lens. Controlling the axial distance between the intersection of the object side surface of the ninth lens and the optical axis and the vertex of the effective radius of the object side surface of the ninth lens and the axial distance between the intersection of the image side surface of the ninth lens and the optical axis and the vertex of the effective radius of the image side surface of the ninth lens within a reasonable range is beneficial to better balance the realization of miniaturization of the module. More specifically, the ratio of SAG92 to SAG91 satisfies: 0.8 < SAG92 / SAG91 < 1.1.

[0058] In an exemplary embodiment, the optical imaging lens according to the present application satisfies: 0.3 < ET1 / ET2 < 1.1. ET1 is the edge thickness of the first lens, and ET2 is the edge thickness of the second lens. By controlling the ratio of the edge thickness of the first lens to the edge thickness of the second lens within a certain range, the sensitivity of the lens can be reduced and the processability can be improved. More specifically, the ratio of ET1 to ET2 satisfies: 0.5 < ET1 / ET2 < 0.9.

[0059] In an exemplary embodiment, the optical imaging lens according to the present application satisfies: -1.2 < f12 / f2 < -0.6, where f12 is the combined focal length of the first lens and the second lens, and f2 is the effective focal length of the second lens. By reasonably controlling the ratio of the combined focal length of the first and second lenses to the effective focal length of the second lens, the optical power of the system can be reasonably distributed so that the positive and negative spherical aberrations cancel each other out. More specifically, f12 and f2 can satisfy: -1.0 < f12 / f2 < -0.5.

[0060] In an exemplary embodiment, the optical imaging lens according to the present application satisfies: -2.0 < f2 / f1 < -1.5, where f1 is the effective focal length of the first lens and f2 is the effective focal length of the second lens. By controlling the ratio of the effective focal length f1 of the first lens to the effective focal length f2 of the second lens within a reasonable range, it is beneficial to adjust the angles of the incident light and the outgoing light of the optical imaging lens, and effectively correct the chromatic aberration of the optical imaging lens and improve the imaging quality of the optical system. More specifically, f1 and f2 may satisfy: -2.0 < f2 / f1 < -1.8.

[0061] In an exemplary embodiment, the optical imaging lens according to the present application satisfies: 2.5 < R17 / R18 < 3.0, where 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. By controlling the ratio of the radius of curvature R17 of the object side surface of the ninth lens to the radius of curvature R18 of the image side surface of the ninth lens, the projection height of the light on the surface of the ninth lens can be regulated, and then the aperture of the last surface can be controlled, which is beneficial to achieving the effect of a large image plane. More specifically, R17 and R18 may satisfy: 2.7 < R17 / R18 < 3.0.

[0062] In an exemplary embodiment, the effective focal length f1 of the first lens may be, for example, in the range of 10.3 mm to 10.5 mm, the effective focal length f3 of the third lens may be, for example, in the range of 24 mm to 27 mm, and the effective focal length f8 of the eighth lens may be, for example, in the range of 14 mm to 15 mm.

[0063] In an exemplary embodiment, the total effective focal length f of the optical imaging lens may be, for example, in the range of 8 mm to 9 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) may be, for example, in the range of 10 mm to 11 mm, half of the diagonal length of the effective pixel region on the imaging surface S21 of the optical imaging lens, ImgH, may be, for example, in the range of 7.0 mm to 8.5 mm, half of the maximum field of view angle of the optical imaging lens, Semi-FOV, may be, for example, in the range of 40° to 44°, and the aperture value Fno of the optical imaging lens may be, for example, in the range of 1.70 to 1.90.

[0064] 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, high imaging quality, and small aberration. 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 optical 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.

[0065] In an embodiment of the present application, at least one of the mirror surfaces of each lens is an aspherical mirror surface, that is, at least one of the mirror surfaces from the object side surface of the first lens to the image side surface of the ninth lens is an aspherical mirror 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, the aberration that appears during imaging can be eliminated 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 mirror 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 mirror surfaces.

[0066] However, those skilled in the art should understand that without departing from the technical solutions 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 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.

[0067] The following further describes specific embodiments of the optical imaging lens applicable to the above embodiments with reference to the accompanying drawings.

[0068] Example 1

[0069] The following refers to Figures 1 to 2D Describe the optical imaging lens according to Embodiment 1 of the present application. Figure 1 FIG. shows a schematic structural diagram of the optical imaging lens according to Embodiment 1 of the present application.

[0070] As shown Figure 1 in the figure, 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.

[0071] The first lens E1 has a positive optical power, its object surface S1 is convex, and its image surface S2 is concave. The second lens E2 has a negative optical power, its object surface S3 is convex, and its image surface S4 is concave. The third lens E3 has a positive optical power, its object surface S5 is convex, and its image surface S6 is concave. The fourth lens E4 has a positive optical power, its object surface S7 is convex, and its image surface S8 is convex. The fifth lens E5 has a positive optical power, its object surface S9 is concave, and its image surface S10 is convex. The sixth lens E6 has a negative optical power, its object surface S11 is convex, and its image surface S12 is concave. The seventh lens E7 has a positive optical power, its object surface S13 is concave, and its image surface S14 is convex. The eighth lens E8 has a positive optical power, its object surface S15 is convex, and its image surface S16 is concave. The ninth lens E9 has a negative optical power, its object surface S17 is convex, and its image surface S18 is concave. The filter E10 has an object surface S19 and an image surface S20. Light from the object sequentially passes through the surfaces S1 to S20 and finally forms an image on the imaging surface S21.

[0072] Table 1 shows the basic parameter table of the optical imaging lens of Example 1, where the units of the radius of curvature, thickness / distance, and focal length are all millimeters (mm).

[0073]

[0074]

[0075] Table 1

[0076] In this example, the total effective focal length f of the optical imaging lens is 8.51 mm, half of the maximum field of view of the optical imaging lens, Semi-FOV, is 43.8°, the total length TTL of the optical imaging lens is 10.70 mm, half of the diagonal length of the effective pixel region on the imaging surface S21 of the optical imaging lens, ImgH, is 8.36 mm, and the aperture value Fno of the optical imaging lens is 1.70.

[0077] In Example 1, the object surface and the image 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:

[0078]

[0079] Wherein, x is the sagitta, the distance from the vertex of the aspheric surface to the position at height h along the optical axis direction of the aspheric surface; c is the paraxial curvature of the aspheric 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 aspheric surface. Table 2 below gives the higher-order coefficients A4, A6, A8, A 10 , A 12 , A 14 , A 16 , A 18 and A 20 .

[0080] Face number A4 A6 A8 A10 A12 A14 A16 A18 A20 S1 -1.3112E-03 1.6421E-04 -3.2855E-04 1.7101E-04 -5.9511E-05 1.2985E-05 -1.7467E-06 1.3070E-07 -4.2219E-09 S2 7.0093E-03 -9.0370E-03 4.0228E-03 -1.0894E-03 1.6631E-04 -7.4194E-06 -1.9344E-06 3.3427E-07 -1.6485E-08 S3 1.9274E-03 -6.6488E-03 2.4019E-03 -3.1423E-04 -8.2244E-05 4.7267E-05 -9.8613E-06 1.0099E-06 -4.1502E-08 S4 -6.4972E-03 2.0443E-03 -2.1967E-03 1.4524E-03 -6.4279E-04 1.9651E-04 -4.0310E-05 4.9572E-06 -2.6809E-07 S5 -7.7719E-03 1.7388E-03 -8.9893E-04 4.0073E-04 -1.8264E-04 7.6732E-05 -2.2285E-05 3.6771E-06 -2.4732E-07 S6 -5.4252E-03 1.1208E-03 -9.1826E-04 7.6715E-04 -4.4982E-04 1.7230E-04 -4.0770E-05 5.4269E-06 -3.0628E-07 S7 -8.1722E-03 -7.4495E-04 5.3072E-04 -2.8078E-04 6.4600E-06 4.7348E-05 -2.0780E-05 3.7115E-06 -2.4234E-07 S8 -7.8309E-03 -2.8825E-03 1.9087E-03 -7.1191E-04 1.0326E-04 2.2102E-05 -1.2496E-05 2.1126E-06 -1.2919E-07 S9 9.4421E-04 -9.0706E-03 5.9249E-03 -2.7449E-03 8.5334E-04 -1.7303E-04 2.2067E-05 -1.6109E-06 5.0309E-08 S10 -2.3716E-03 -6.1896E-03 7.0354E-03 -4.3421E-03 1.4840E-03 -3.0698E-04 3.9169E-05 -2.8909E-06 9.5508E-08 S11 -1.6956E-02 3.4967E-03 2.2050E-03 -2.0061E-03 6.4968E-04 -1.1196E-04 1.0783E-05 -5.3458E-07 1.0103E-08 S12 -7.5865E-03 -1.9678E-03 2.7041E-03 -1.2488E-03 3.1645E-04 -4.7790E-05 4.2798E-06 -2.0917E-07 4.2868E-09 S13 1.6327E-02 -1.2950E-02 6.1927E-03 -2.0472E-03 4.3850E-04 -5.8887E-05 4.7882E-06 -2.1590E-07 4.1475E-09 S14 1.7066E-03 -7.2841E-03 3.3494E-03 -9.2055E-04 1.5712E-04 -1.6445E-05 1.0335E-06 -3.6146E-08 5.4520E-10 S15 -6.0313E-03 -1.9723E-03 7.4330E-04 -1.9250E-04 2.8958E-05 -2.5645E-06 1.3160E-07 -3.6036E-09 4.0579E-11 S16 2.8297E-03 1.1165E-04 -2.9758E-04 5.1549E-05 -4.4735E-06 2.2924E-07 -7.0205E-09 1.1860E-10 -8.4759E-13 S17 -3.9692E-02 6.4905E-03 -8.2713E-04 7.4133E-05 -4.2983E-06 1.5664E-07 -3.4658E-09 4.2598E-11 -2.2344E-13 S18 -1.3412E-02 1.6732E-03 -1.3610E-04 5.6688E-06 -6.1638E-08 -4.3811E-09 1.9844E-10 -3.3013E-12 2.0359E-14

[0081] Table 2

[0082] Figure 2A shows the axial chromatic aberration curve of the optical imaging lens of Example 1, which represents the deviation of the convergence points of light rays of different wavelengths after passing through the lens. Figure 2B shows the astigmatism curve of the optical imaging lens of Example 1, which represents the meridional image plane curvature and the sagittal image plane curvature. Figure 2C shows the distortion curve of the optical imaging lens of Example 1, which represents the distortion magnitude values corresponding to different image heights. Figure 2D shows the longitudinal chromatic aberration curve of the optical imaging lens of Example 1, 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 Example 1 can achieve good imaging quality.

[0083] Example 2

[0084] The following will refer to Figures 3 to 4D to describe the optical imaging lens according to Embodiment 2 of the present application. 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 shows the structural schematic diagram of the optical imaging lens according to Embodiment 2 of the present application.

[0085] As Figure 3 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.

[0086] The first lens E1 has a positive focal power, with its object side S1 being convex and its image side S2 being concave. The second lens E2 has a negative focal power, with its object side S3 being convex and its image side S4 being concave. The third lens E3 has a positive focal power, with its object side S5 being convex and its image side S6 being concave. The fourth lens E4 has a positive focal power, with its object side S7 being convex and its image side S8 being convex. The fifth lens E5 has a negative focal power, with its object side S9 being concave and its image side S10 being convex. The sixth lens E6 has a negative focal power, with its object side S11 being convex and its image side S12 being concave. The seventh lens E7 has a negative focal power, with its object side S13 being concave and its image side S14 being convex. The eighth lens E8 has a positive focal power, with its object side S15 being convex and its image side S16 being concave. The ninth lens E9 has a negative focal power, with its object side S17 being convex and its image side S18 being concave. 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.

[0087] In this example, the total effective focal length f of the optical imaging lens is 8.51 mm, half of the maximum field of view angle of the optical imaging lens, Semi - FOV, is 43.8°, the total length TTL of the optical imaging lens is 10.69 mm, half of the diagonal length of the effective pixel area on the imaging surface S21 of the optical imaging lens, ImgH, is 8.36 mm, and the f - number Fno of the optical imaging lens is 1.70.

[0088] 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). Table 4 shows the higher - order term coefficients that can be used for each aspherical mirror surface in Example 2, where each aspherical surface type can be defined by the formula (1) given in the above Example 1.

[0089]

[0090]

[0091] Table 3

[0092]

[0093]

[0094] Table 4

[0095] 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 The distortion curve of the optical imaging lens of Embodiment 2 is shown, which represents the distortion magnitude values corresponding to different image heights. Figure 4D The longitudinal chromatic aberration curve of the optical imaging lens of Embodiment 2 is shown, which represents the deviation of different image heights on the imaging plane after light passes through the lens. According to Figures 4A to 4D it can be seen that the optical imaging lens given in Embodiment 2 can achieve good imaging quality.

[0096] Example 3

[0097] The following refers to Figures 5 to 6D to describe the optical imaging lens according to Embodiment 3 of the present application. Figure 5 The structural schematic diagram of the optical imaging lens according to Embodiment 3 of the present application is shown.

[0098] As Figure 5 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.

[0099] The first lens E1 has a positive optical 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 optical 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 optical 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 optical 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 optical 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 negative optical power, its object side surface S11 is a convex surface, and its image side surface S12 is a concave surface. The seventh lens E7 has a positive optical power, its object side surface S13 is a concave surface, and its image side surface S14 is a convex surface. The eighth lens E8 has a positive optical 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 optical 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 the object sequentially passes through the surfaces S1 to S20 and finally forms an image on the imaging surface S21.

[0100] In this example, the total effective focal length f of the optical imaging lens is 8.51 mm, half of the maximum field of view of the optical imaging lens Semi - FOV is 43.8°, the total length TTL of the optical imaging lens is 10.70 mm, half of the diagonal length of the effective pixel area on the imaging surface S21 of the optical imaging lens ImgH is 8.35 mm, and the aperture value Fno of the optical imaging lens is 1.90.

[0101] 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). Table 6 shows the high-order term coefficients of each aspherical mirror surface that can be used in Embodiment 3, where each aspherical surface type can be defined by the formula (1) given in the above Embodiment 1.

[0102]

[0103]

[0104] Table 5

[0105]

[0106]

[0107] Table 6

[0108] 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 with 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 lateral chromatic aberration curve of the optical imaging lens of Embodiment 3, which represents the deviation of different image heights on the imaging plane after the light rays pass through the lens. According to Figures 6A to 6D it can be known that the optical imaging lens given in Embodiment 3 can achieve good imaging quality.

[0109] Example 4

[0110] The following refers to Figures 7 to 8D describes the optical imaging lens according to Embodiment 4 of the present application. Figure 7 shows the structural schematic diagram of the optical imaging lens according to Embodiment 4 of the present application.

[0111] 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.

[0112] The first lens E1 has a positive optical power, with its object side S1 being convex and its image side S2 being concave. The second lens E2 has a negative optical power, with its object side S3 being convex and its image side S4 being concave. The third lens E3 has a positive optical power, with its object side S5 being convex and its image side S6 being concave. The fourth lens E4 has a positive optical power, with its object side S7 being concave and its image side S8 being convex. The fifth lens E5 has a positive optical power, with its object side S9 being concave and its image side S10 being convex. The sixth lens E6 has a negative optical power, with its object side S11 being convex and its image side S12 being concave. The seventh lens E7 has a positive optical power, with its object side S13 being concave and its image side S14 being convex. The eighth lens E8 has a positive optical power, with its object side S15 being convex and its image side S16 being concave. The ninth lens E9 has a negative optical power, with its object side S17 being convex and its image side S18 being concave. The filter E10 has an object side S19 and an image side S20. Light from the object sequentially passes through each surface S1 to S20 and finally forms an image on the imaging surface S21.

[0113] In this example, the total effective focal length f of the optical imaging lens is 8.51 mm, half of the maximum field of view angle of the optical imaging lens, Semi - FOV, is 43.8°, the total length TTL of the optical imaging lens is 10.70 mm, half of the diagonal length of the effective pixel area on the imaging surface S21 of the optical imaging lens, ImgH, is 8.35 mm, and the f - number of the optical imaging lens, Fno, is 1.70.

[0114] 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). Table 8 shows the high - order term coefficients that can be used for each aspherical mirror surface in Example 4, where each aspherical surface type can be defined by the formula (1) given in the above Example 1.

[0115]

[0116] Table 7

[0117]

[0118]

[0119] Table 8

[0120] Figure 8A Shows the axial chromatic aberration curve of the optical imaging lens of Example 4, which represents the deviation of the convergence points of light rays of different wavelengths after passing through the lens. Figure 8B Shows the astigmatism curve of the optical imaging lens of Example 4, which represents the meridional image plane curvature and the sagittal image plane curvature. Figure 8CThe distortion curve of the optical imaging lens of Embodiment 4 is shown, which represents the distortion magnitude values corresponding to different image heights. Figure 8D The longitudinal chromatic aberration curve of the optical imaging lens of Embodiment 4 is shown, which represents the deviation of different image heights on the imaging plane after light passes through the lens. According to Figures 8A to 8D it can be known that the optical imaging lens given in Embodiment 4 can achieve good imaging quality.

[0121] Example 5

[0122] The following refers to Figures 9 to 10D the optical imaging lens according to Embodiment 5 of the present application is described. Figure 9 The structural schematic diagram of the optical imaging lens according to Embodiment 5 of the present application is shown.

[0123] 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.

[0124] The first lens E1 has a positive optical 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 optical 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 optical 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 optical 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 optical 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 negative optical power, its object side surface S11 is a convex surface, and its image side surface S12 is a concave surface. The seventh lens E7 has a positive optical power, its object side surface S13 is a concave surface, and its image side surface S14 is a convex surface. The eighth lens E8 has a positive optical 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 optical 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 the object sequentially passes through each surface S1 to S20 and finally forms an image on the imaging surface S21.

[0125] In this example, the total effective focal length f of the optical imaging lens is 8.55 mm, half of the maximum field of view of the optical imaging lens, Semi - FOV, is 43.7°, the total length TTL of the optical imaging lens is 10.70 mm, half of the diagonal length of the effective pixel area on the imaging surface S21 of the optical imaging lens, ImgH, is 8.36 mm, and the aperture value Fno of the optical imaging lens is 1.70.

[0126] Table 9 shows the basic parameter table of the optical imaging lens of Embodiment 5, where the units of the radius of curvature, thickness / distance, and focal length are all millimeters (mm). Table 10 shows the high-order term coefficients of each aspherical mirror surface that can be used in Embodiment 5, where each aspherical surface type can be defined by the formula (1) given in Embodiment 1 above.

[0127]

[0128] Table 9

[0129]

[0130]

[0131] Table 10

[0132] 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 known that the optical imaging lens given in Embodiment 2 can achieve good imaging quality.

[0133] Example 6

[0134] The following refers to Figures 11 to 12D to describe 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.

[0135] As Figure 11 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 optical power, its object side S1 is convex, and its image side S2 is concave. The second lens E2 has a negative optical power, its object side S3 is convex, and its image side S4 is concave. The third lens E3 has a positive optical power, its object side S5 is convex, and its image side S6 is concave. The fourth lens E4 has a positive optical power, its object side S7 is concave, and its image side S8 is convex. The fifth lens E5 has a positive optical power, its object side S9 is concave, and its image side S10 is convex. The sixth lens E6 has a negative optical power, its object side S11 is concave, and its image side S12 is concave. The seventh lens E7 has a positive optical power, its object side S13 is concave, and its image side S14 is convex. The eighth lens E8 has a positive optical power, its object side S15 is convex, and its image side S16 is concave. The ninth lens E9 has a negative optical power, its object side S17 is convex, and its image side S18 is concave. The filter E10 has an object side S19 and an image side S20. Light from the 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 8.51 mm, half of the maximum field of view angle of the optical imaging lens, Semi-FOV, is 43.8°, the total length TTL of the optical imaging lens is 10.70 mm, half of the diagonal length of the effective pixel area on the imaging surface S21 of the optical imaging lens, ImgH, is 8.36 mm, and the f-number Fno of the optical imaging lens is 1.70.

[0138] 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). Table 12 shows the high-order term coefficients that can be used for each aspherical mirror surface in Example 6, where each aspherical surface type can be defined by the formula (1) given in the above Example 1.

[0139]

[0140] Table 11

[0141]

[0142]

[0143] Table 12

[0144] Figure 12A Shows the axial chromatic aberration curve of the optical imaging lens of Example 6, which represents the deviation of the convergence points of light rays of different wavelengths after passing through the lens. Figure 12B Shows the astigmatism curve of the optical imaging lens of Example 6, which represents the meridional image plane curvature and the sagittal image plane curvature. Figure 12CThe distortion curve of the optical imaging lens of Embodiment 6 is shown, which represents the distortion magnitude values corresponding to different image heights. Figure 12D The longitudinal chromatic aberration curve of the optical imaging lens of Embodiment 6 is shown, which represents the deviation of different image heights on the imaging plane after light passes through the lens. According to Figures 12A to 12D it can be known that the optical imaging lens given in Embodiment 6 can achieve good imaging quality.

[0145] In summary, Embodiments 1 to 6 respectively satisfy the relationships shown in Table 13.

[0146]

[0147]

[0148] Table 13

[0149] 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.

[0150] 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, all of which have optical powers. The first lens has a positive optical power, its object side surface is convex, and its image side surface is concave. The second lens has a negative optical power, its object side surface is convex, and its image side surface is concave. The third lens has a positive optical power, its object side surface is convex, and its image side surface is concave. The fourth lens has a positive optical power. The object side surface of the fifth lens is concave, and its image side surface is convex. The sixth lens has a negative optical power, and its image side surface is concave. The object side surface of the seventh lens is concave, and its image side surface is convex. The eighth lens has a positive optical power, its object side surface is convex, and its image side surface is concave. The ninth lens has a negative optical power, its object side surface is convex, and its image side surface is concave. Both the fifth lens and the seventh lens have positive optical powers or both have negative optical powers. The number of lenses with optical powers in the optical imaging lens is nine. Among them, the optical imaging lens satisfies: -1.8 < f9 / (R17 - R18) < -1.6, where f9 is the effective focal length of the ninth lens, 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.

2. The optical imaging lens according to claim 1, wherein The optical imaging lens satisfies: 1.28 ≤ TTL / ImgH < 1.3, where 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.

3. The optical imaging lens according to claim 1, characterized in that, The optical imaging lens satisfies: 1.70 ≤ f / EPD ≤ 1.90, where f is the effective focal length of the optical imaging lens, and EPD is the entrance pupil diameter of the optical imaging lens.

4. The optical imaging lens according to claim 1, wherein The optical imaging lens satisfies: -1.0 < f12 / f2 ≤ -0.87, where f12 is the combined focal length of the first lens and the second lens, and f2 is the effective focal length of the second lens.

5. The optical imaging lens according to claim 1, characterized in that, The optical imaging lens satisfies: 0.94 ≤ (f1 + f8) / f3 ≤ 1.01, where f1 is the effective focal length of the first lens, f3 is the effective focal length of the third lens, and f8 is the effective focal length of the eighth lens.

6. The optical imaging lens according to claim 1, characterized in that, The optical imaging lens satisfies: 8.35 mm < ImgH < 8.5 mm, where ImgH is half of the diagonal length of the effective pixel area on the imaging surface of the optical imaging lens.

7. The optical imaging lens according to claim 1, wherein, The optical imaging lens satisfies: 0.54 ≤ R10 / R9 ≤ 1.02, where R9 is the curvature radius of the object side surface of the fifth lens, and R10 is the curvature radius of the image side surface of the fifth lens.

8. The optical imaging lens according to claim 1, wherein The optical imaging lens satisfies: 1.3 < R5 / (R6 - R5) ≤ 1.63, where 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.

9. The optical imaging lens according to claim 1, wherein The optical imaging lens satisfies: 1.31 ≤ f tan(Semi - FOV) / ∑CT < 1.33, Wherein, f is the effective focal length of the optical imaging lens, Semi-FOV is the maximum semi-field angle of the optical imaging lens, and ∑CT is the sum of the central thicknesses of the first lens to the ninth lens on the optical axis respectively.

10. The optical imaging lens according to claim 1, characterized in that, The optical imaging lens satisfies: 0.98 ≤ CT8 / CT9 ≤ 1.10, Wherein, CT8 is the central thickness of the eighth lens on the optical axis, and CT9 is the central thickness of the ninth lens on the optical axis.

11. The optical imaging lens according to claim 1, characterized in that, The optical imaging lens satisfies: 0.78 ≤ (CT1 + CT2 + CT3) / DT11 ≤ 0.87, Wherein, 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, CT3 is the central thickness of the third lens on the optical axis, and DT11 is the effective semi-aperture of the object side of the first lens.

12. The optical imaging lens according to claim 1, wherein The optical imaging lens satisfies: 0.78 ≤ EPD / DT91 ≤ 0.87, Wherein, EPD is the entrance pupil diameter of the optical imaging lens, and DT91 is the effective semi-aperture of the object side of the ninth lens.

13. The optical imaging lens according to claim 1, characterized in that, The optical imaging lens satisfies: 0.93 ≤ (SAG31 - SAG32) / SAG32 ≤ 1.25, Wherein, SAG31 is the axial distance between the intersection point of the object side of the third lens and the optical axis and the vertex of the effective radius of the object side of the third lens, and SAG32 is the axial distance between the intersection point of the image side of the third lens and the optical axis and the vertex of the effective radius of the image side of the third lens.

14. The optical imaging lens according to claim 1, characterized in that, The optical imaging lens satisfies: 1.00 < SAG92 / SAG91 < 1.03, Wherein, SAG91 is the axial distance between the intersection point of the object side of the ninth lens and the optical axis and the vertex of the effective radius of the object side of the ninth lens, and SAG92 is the axial distance between the intersection point of the image side of the ninth lens and the optical axis and the vertex of the effective radius of the image side of the ninth lens.

15. The optical imaging lens according to claim 1, characterized in that, The optical imaging lens satisfies: 0.50 ≤ ET1 / ET2 ≤ 0.85, Wherein, ET1 is the edge thickness of the first lens, and ET2 is the edge thickness of the second lens.

16. The optical imaging lens according to claim 1, wherein The optical imaging lens satisfies: -2.0 < f2 / f1 < -1.8, Wherein, f1 is the effective focal length of the first lens, and f2 is the effective focal length of the second lens.

17. The optical imaging lens according to claim 1, wherein The optical imaging lens satisfies: 2.77 ≤ R17 / R18 ≤ 2.82, Wherein, R17 is the curvature radius of the object side of the ninth lens, and R18 is the curvature radius of the image side of the ninth lens.

Images