Optical imaging lens

Abstract

The invention relates to an optical imaging lens comprising a lens barrel which is used for accommodating a lens group and a plurality of spacing elements. The lens group sequentially comprises a first lens, a second lens, a third lens, a fourth lens and a fifth lens from the object side to the image side along the optical axis. The plurality of spacing elements at least comprise first to third spacing elements; the optical imaging lens satisfies the following conditions: 1.29 < = CT4 / T45 < = 6.00; 3.76 < = EP23 / (CT3-T34) < = 9.48; cT3 / (EP23-EP12) is greater than or equal to 1.08 and less than or equal to 12.57. According to the optical imaging lens provided by the invention, the lens formation risk is minimized while the lens miniaturization is ensured.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of imaging lens, in particular to an optical imaging lens. BACKGROUND

[0002] With the rapid development of the optical photoelectric industry, optical lenses as the core imaging components are experiencing the dual challenges of technological innovation and industrial upgrading. Under the background of the popularization of multi-camera in smart phones, automatic driving vision system, and the rise of AR / VR devices, the market requirements for the performance of optical lenses have shifted from basic imaging capabilities to high resolution, large field of view, miniaturization integration and other composite technical indicators. Especially under the driving of 5G+AI technology, the terminal products put forward higher requirements for the resolution, dynamic range, low light performance and other parameters of image acquisition, which directly promotes the technical iteration of optical lens design. Under this background, the development of a high-performance optical imaging system composed of five lenses has become a key breakthrough to balance the optical performance and commercialization of products.

[0003] The current optical lens generally has the problem of low miniaturization degree. The common way to shorten the total length of the lens and realize the miniaturization of the lens can be to control the center thickness of the lens, but the center thickness of the lens is too thin, which may cause the lens to have a molding risk.

[0004] Therefore, how to balance the relationship between lens miniaturization and lens molding risk has become the focus of current design. SUMMARY

[0005] In order to solve the problems existing in the prior art, the purpose of the present application is to provide an optical imaging lens which meets the requirement of lens miniaturization while reducing the molding risk of the lens.

[0006] In order to achieve the above-mentioned purpose of the application, the optical imaging lens provided by the present application comprises a lens barrel, a lens group and a plurality of spacer elements, the lens barrel is used to accommodate the lens group and the plurality of spacer elements; characterized in that the lens group comprises in sequence: a first lens with negative focal power, a second lens with positive focal power, a third lens with negative focal power, a fourth lens with positive focal power and a fifth lens with negative focal power; the first lens to the fifth lens are arranged in sequence along the optical axis from the side of the object to the side of the imaging surface, each lens has at least one object side surface facing the side of the object and one image side surface facing the side of the imaging surface, and there is an air gap between adjacent lenses.

[0007] The plurality of spacer elements comprises:

[0008] A first spacer element is arranged on the image side of the first lens and at least partially contacts the image side surface of the first lens.

[0009] a second spacer element disposed on the image side of the second lens and at least partially in contact with the image side surface of the second lens;

[0010] a third spacer element disposed on the image side of the third lens and at least partially in contact with the image side surface of the third lens;

[0011] a fourth spacer element disposed on the image side of the fourth lens and at least partially in contact with the image side surface of the fourth lens;

[0012] The optical imaging lens satisfies:

[0013] 1.29≤CT4 / T45≤6.00;

[0014] 3.76≤EP23 / (CT3-T34)≤9.48;

[0015] 1.08≤CT3 / (EP23-EP12)≤12.57;

[0016] wherein EP12 is the interval distance between the image side surface of the first spacer element and the object side surface of the second spacer element along the optical axis, EP23 is the interval distance between the image side surface of the second spacer element and the object side surface of the third spacer element along the optical axis, T34 is the air interval between the third lens and the fourth lens along the optical axis, T45 is the air interval between the fourth lens and the fifth lens along the optical axis, CT3 is the center thickness of the third lens, and CT4 is the center thickness of the fourth lens.

[0017] According to one of the technical solutions of the present application, the optical imaging lens satisfies: 0.86≤(|SAG51|+CT5) / EP34≤2.02;

[0018] wherein SAG51 is the on-axis displacement between the intersection of the object side surface of the fifth lens and the optical axis and the vertex of the effective radius of the optical area of the object side surface of the fifth lens, CT5 is the center thickness of the fifth lens, and EP34 is the interval distance between the image side surface of the third spacer element and the object side surface of the fourth spacer element along the optical axis.

[0019] According to one of the technical solutions of the present application, the plurality of spacer elements comprises a fourth auxiliary spacer element disposed on the image side of the fourth spacer element and at least partially in contact with the image side surface of the fourth spacer element;

[0020] The optical imaging lens satisfies: 0.49≤(CP4+CP4b) / T45≤1.63;

[0021] Wherein, T45 is the air interval of the fourth lens and the fifth lens on the optical axis, CP4b is the maximum thickness of the fourth auxiliary spacer element along the optical axis direction, and CP4 is the maximum thickness of the fourth spacer element along the optical axis direction.

[0022] According to one of the technical solutions of the present application, the optical imaging lens satisfies: 0.86≤R7 / d3m≤2.13; -3.05≤R7 / R8≤-1.14;

[0023] Wherein, R7 is the curvature radius of the object side of the fourth lens, R8 is the curvature radius of the image side of the fourth lens, and d3m is the inner diameter of the image side of the third spacer element.

[0024] According to one of the technical solutions of the present application, the optical imaging lens satisfies: 3.73≤d1s / (T12-CT1)≤4.94;

[0025] Wherein, T12 is the air interval of the first lens and the second lens on the optical axis, CT1 is the center thickness of the first lens, and d1s is the inner diameter of the object side of the first spacer element.

[0026] According to one of the technical solutions of the present application, the optical imaging lens satisfies: 1.16≤(CT2+CP2) / EP12≤2.96;

[0027] Wherein, CT2 is the center thickness of the second lens, CP2 is the maximum thickness of the second spacer element along the optical axis direction, and EP12 is the interval distance between the image side of the first spacer element and the object side of the second spacer element along the optical axis direction.

[0028] According to one of the technical solutions of the present application, the optical imaging lens satisfies: 5.20≤SAG41 / CP3≤11.20;

[0029] Wherein, SAG41 is the on-axis displacement between the intersection of the object side of the fourth lens and the optical axis and the vertex of the effective radius of the optical area of the object side of the fourth lens; and CP3 is the maximum thickness of the third spacer element along the optical axis direction.

[0030] According to one of the technical solutions of the present application, the optical imaging lens satisfies: 148.18≤(d0m / d0s)*FOV≤237.33;

[0031] Wherein, FOV is the maximum field of view of the optical imaging lens, d0m is the inner diameter of the image side of the lens barrel, and d0s is the inner diameter of the object side of the lens barrel.

[0032] According to one of the technical solutions of the present application, the optical imaging lens satisfies: 1.14≤(D1s-d1s) / T12≤4.26;

[0033] Wherein, D1s is the outer diameter of the object side surface of the first spacer element, d1s is the inner diameter of the object side surface of the first spacer element, and T12 is the air gap of the first lens and the second lens on the optical axis.

[0034] According to one of the technical solutions of the present application, the optical imaging lens satisfies: 0.30≤(D2s-d2s) / f2≤1.38;

[0035] Wherein, f2 is the effective focal length of the second lens, D2s is the outer diameter of the object side surface of the second spacer element, and d2s is the inner diameter of the object side surface of the second spacer element.

[0036] According to one of the technical solutions of the present application, the optical imaging lens satisfies: 3.02≤f23 / (EP23+T23)≤8.67;

[0037] Wherein, f23 is the combined focal length of the second lens and the third lens, EP23 is the interval distance of the image side surface of the second spacer element and the object side surface of the third spacer element along the optical axis, and T23 is the air gap of the second lens and the third lens on the optical axis.

[0038] According to one of the technical solutions of the present application, the optical imaging lens satisfies: 2.48≤EP01 / CT1≤4.68;

[0039] Wherein, CT1 is the center thickness of the first lens, and EP01 is the interval distance of the object side surface of the lens barrel and the object side surface of the first spacer element along the optical axis.

[0040] According to one of the technical solutions of the present application, the plurality of spacer elements further comprises: a fourth auxiliary spacer element disposed on the image side of the fourth spacer element and at least partially in contact with the image side surface of the fourth spacer element;

[0041] The optical imaging lens satisfies: 2.15≤f45 / (d4s-d4bs)≤9.21;

[0042] Wherein, d4s is the inner diameter of the object side surface of the fourth spacer element, d4bs is the inner diameter of the object side surface of the fourth auxiliary spacer element, and f45 is the combined focal length of the fourth lens and the fifth lens.

[0043] According to one of the technical solutions of the present application, the optical imaging lens satisfies: 4.71≤d3s / (CP3+CT3)≤8.18; -2.63≤f3 / d3s≤-1.33;

[0044] wherein d3s is an inner diameter of an object side surface of the third spacer element, CP3 is a maximum thickness of the third spacer element in the direction of the optical axis, CT3 is a center thickness of the third lens, and f3 is an effective focal length of the third lens.

[0045] The beneficial effects of the present application are:

[0046] The optical imaging lens of the present application is a miniaturized lens composed of 5 lenses. By controlling the middle thickness of the fourth lens, the ratio range of the air gap of the fourth and fifth lenses in the overall optical total length, the lens rear lens structure is more compact, ensuring that the lens has the characteristics of miniaturization, but it will cause insufficient space at the front end of the lens. To ensure the space and optical performance of the front end of the lens, the third lens has the structural feature of being thin in the middle and thick on both sides, which causes a greater risk of molding the lens. By controlling the optical imaging lens to satisfy the constraint relationship of 3.76≤EP23 / (CT3-T34)≤9.48 and 1.08≤CT3 / (EP23-EP12)≤12.57, i.e. controlling the edge thickness and center thickness of the third lens, the air gap of the third lens and the fourth lens, and ensuring the overall symmetry of the third lens, the structural molding risk of the third lens can be minimized. BRIEF DESCRIPTION OF DRAWINGS

[0047] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings needed in the embodiments. Obviously, the drawings described below are only some embodiments of the present application, and other drawings can also be obtained by those skilled in the art without creative labor.

[0048] FIG. 1A The structural arrangement diagram of an optical imaging lens according to the present application is shown;

[0049] FIG. 1B The schematic diagram of part of the parameters of an optical imaging lens according to the present application is shown;

[0050] FIG. 2A , FIG. 2B and FIG. 2C The structural schematic diagrams of three optical imaging lenses according to the first embodiment of the present application are shown;

[0051] FIG. 3A , FIG. 3B and FIG. 3C The on-axis chromatic aberration curve, the astigmatism curve and the magnification chromatic aberration curve of the optical imaging lens according to the first embodiment of the present application at the telephoto position are shown respectively;

[0052] FIG. 4A ,FIG. 4B and FIG. 4C The structural schematic diagrams of three optical imaging lenses according to Embodiment Two of the present application are shown;

[0053] FIG. 5A , FIG. 5B and FIG. 5C The on-axis chromatic aberration curve, the astigmatism curve and the lateral chromatic aberration curve of the optical imaging lens according to Embodiment Two of the present application at the infinity position are shown respectively;

[0054] FIG. 6A , FIG. 6B and FIG. 6C The structural schematic diagrams of three optical imaging lenses according to Embodiment Three of the present application are shown;

[0055] FIG. 7A , FIG. 7B and FIG. 7C The on-axis chromatic aberration curve, the astigmatism curve and the lateral chromatic aberration curve of the optical imaging lens according to Embodiment Three of the present application at the infinity position are shown respectively;

[0056] FIG. 8 The lens forming state simulation analysis diagram of the third lens when the optical imaging lens satisfies CT3 / (EP23-EP12) = 0.5 is shown;

[0057] FIG. 9 The lens forming state simulation analysis diagram of the third lens when the optical imaging lens satisfies CT3 / (EP23-EP12) = 5 is shown;

[0058] FIG. 10 The lens forming state simulation analysis diagram of the third lens when the optical imaging lens satisfies CT3 / (EP23-EP12) = 15 is shown. DETAILED DESCRIPTION

[0059] For a better understanding of the present application, various aspects of the present application will be described in more detail below with reference to the accompanying drawings. It is to be understood that the detailed description is merely descriptive of exemplary embodiments of the present application and is not intended to limit the scope of the present application in any way. Throughout the specification, like reference numbers refer to like elements. The expression “and / or” includes any and all combinations of one or more of the associated listed items.

[0060] It should be noted that in the present specification, the expressions first, second, third, etc. are merely used to distinguish one feature from another feature, and do not represent any limitation on the features. Therefore, the first lens discussed below can be referred to as the second lens or the third lens, and can also be referred to as the first lens, without departing from the teachings of the present application.

[0061] In the drawings, the thickness, size, and shape of the lenses have been exaggerated slightly for ease of explanation. Specifically, the shape of the spherical or aspherical surface shown in the drawings is shown by way of example. That is, the shape of the spherical or aspherical surface is not limited to the shape of the spherical or aspherical surface shown in the drawings. The drawings are merely examples and are not drawn to scale.

[0062] In this context, the paraxial region refers to a region near the optical axis. If a lens surface is convex and the position of the convex surface is not specified, it means that the lens surface is convex at least in the paraxial region. If a lens surface is concave and the position of the concave surface is not specified, it means that the lens surface is concave at least in the paraxial region. The concave or convex of the surface shape in the paraxial region can be determined based on the sign of R (R refers to the radius of curvature in the paraxial region). In this context, with respect to a lens, the side on which the subject to be imaged is located is the object side, and the side on which the image of the subject to be imaged is located is the image side. The surface of each lens near the object side is referred to as the object side surface of the lens, and the surface of each lens near the image side is referred to as the image side surface of the lens. The object side surface or the image side surface of each lens has an optical region and a structure region, the optical region refers to a light passing region, and the structure region refers to a region for assembly. With respect to the object side surface, when R is positive, it is determined to be convex, and when R is negative, it is determined to be concave. With respect to the image side surface, when R is positive, it is determined to be concave, and when R is negative, it is determined to be convex. The object side surface or the image side surface of each lens has an optical region and a structure region, the optical region refers to a light passing region, and the structure region refers to a region for assembly.

[0063] It should also be understood that the use of the terms "including", "including", "having", "containing", and / or "containing", when used in this specification, means that the presence of the stated features, elements and / or components, but does not exclude the presence or addition of one or more other features, elements, components and / or combinations thereof. In addition, when expressions such as "at least one of" appear after a list of listed features, they modify the entire list of features and not the individual elements of the list. In addition, when describing embodiments of the present application, the use of "may" indicates "one or more embodiments of the present application". And the term "exemplary" is intended to refer to an example or illustration.

[0064] 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 belongs. It should also be understood that the terms (such as those defined in commonly used dictionaries) should be interpreted as having a meaning that is consistent with their meaning in the context of the relevant art and should not be interpreted in an idealized or overly formal sense unless expressly so defined herein.

[0065] It should be noted that the embodiments and features in the present application can be combined with each other without conflict. The following embodiments only express several implementation manners of the present application, which are described in detail and specifically, but should not be understood as limitation to the patent scope of the present application. It should be pointed out that, for ordinary skilled in the art, without departing from the concept of the present application, several modifications and improvements can be made, which are within the protection scope of the present application.

[0066] As shown in FIG. 1A and FIG. 1B According to the first aspect of the present application, an optical imaging lens is provided, which comprises a lens barrel, and a lens group and a plurality of spacer elements accommodated in the lens barrel, the lens group comprising five lenses, i.e. a first lens with negative focal power, a second lens with positive focal power, a third lens with negative focal power, a fourth lens with positive focal power and a fifth lens with negative focal power; the first lens to the fifth lens are arranged in order from the side of the object to the side of the imaging surface along the optical axis, each lens has at least one object side surface facing the side of the object and one image side surface facing the side of the imaging surface, and there is an air gap between adjacent lenses.

[0067] The first lens to the fifth lens are arranged in order from the side of the object to the side of the imaging surface along the optical axis, each lens has at least one object side surface facing the side of the object and one image side surface facing the side of the imaging surface, and there is an air gap between adjacent lenses.

[0068] The plurality of spacer elements at least comprises: a first spacer element disposed on the image side of the first lens and at least partially in contact with the image side surface of the first lens; a second spacer element disposed on the image side of the second lens and at least partially in contact with the image side surface of the second lens; a third spacer element disposed on the image side of the third lens and at least partially in contact with the image side surface of the third lens; a fourth spacer element disposed on the image side of the fourth lens and at least partially in contact with the image side surface of the fourth lens; and a fourth auxiliary spacer element disposed on the image side of the fourth spacer element and at least partially in contact with the image side surface of the fourth spacer element.

[0069] The imaging lens group and the plurality of spacer elements are accommodated in the lens barrel, the lens barrel comprises an object side end surface, an image side end surface, an outer annular surface and an inner annular surface, and the inner annular surface of the lens barrel is in a stepped shape along the optical axis direction of the optical imaging lens.

[0070] By reasonably distributing the focal power of each lens and the combination of convex and concave surfaces, on the one hand, chromatic aberration and spherical aberration can be effectively reduced, and the color accuracy and clarity of the image can be improved; on the other hand, the focal length and depth of field can be controlled to achieve a good background blur effect; at the same time, the distribution of light is optimized, optical distortion is reduced, and the uniformity and brightness of the imaging are improved; in addition, the sharpness, contrast and color saturation of the image are also improved, and a high-quality imaging effect is achieved.

[0071] In some embodiments of the present application, the optical imaging lens can further comprise a color filter for correcting color deviation and / or a protective glass for protecting the photosensitive elements located on the imaging surface.

[0072] In some embodiments of the present application, the optical imaging lens satisfies: 1.29≤CT4 / T45≤6.00; 3.76≤EP23 / (CT3-T34)≤9.48; 1.08≤CT3 / (EP23-EP12)≤12.57; wherein EP12 is the interval distance between the image side surface of the first spacer element and the object side surface of the second spacer element along the optical axis direction, EP23 is the interval distance between the image side surface of the second spacer element and the object side surface of the third spacer element along the optical axis direction, T34 is the air interval of the third lens and the fourth lens on the optical axis, T45 is the air interval of the fourth lens and the fifth lens on the optical axis, and CT3 is the center thickness of the third lens, and CT4 is the center thickness of the fourth lens.

[0073] The optical imaging lens in the present application is a wide-angle and miniaturized lens composed of five lenses. By controlling the ratio of the center thickness of the fourth lens to the air interval of the fourth lens and the fifth lens on the optical axis, the lens structure at the rear of the lens is more compact, ensuring that the lens has the characteristics of miniaturization. However, when the optical imaging lens satisfies 1.29≤CT4 / T45≤6.00, the space at the front end of the lens is insufficient. To ensure the space and optical performance of the lens at the front end, the characteristics of miniaturization of the lens make the third lens have the structural characteristics of being thin in the middle and thick on both sides, resulting in a great molding risk of the structure of the third lens. By controlling the optical imaging lens to satisfy the constraint relationship of 3.76≤EP23 / (CT3-T34)≤9.48 and 1.08≤CT3 / (EP23-EP12)≤12.57, i.e., by controlling the edge thickness of the third lens, the center thickness of the third lens, and the air interval between the third lens and the fourth lens, the overall symmetry of the third lens is ensured, and the molding risk can be minimized.

[0074] For example, as shown in Table 1 and Table 2 below, when the optical imaging lens satisfies 1.29≤CT4 / T45≤6.00 and 3.76≤EP23 / (CT3-T34)≤9.48, setting CT3 / (EP23-EP12) = 0.5, the lower limit of the range, as shown in Table 3 below, the molding risk of the third lens is large; setting CT3 / (EP23-EP12) = 5, satisfying the above relationship, as shown in Table 4 below, the molding risk of the third lens is small; and setting CT3 / (EP23-EP12) = 15, exceeding the upper limit of the range, as shown in Table 5 below, the molding risk of the third lens is large. FIG. 8 to FIG. 10 FIG. 8 FIG. 9 FIG. 10

[0075] ​​​​ Lower limit of the range In the range Upper limit of the range Conditional expression CT3 / (EP23-EP12) = 0.5 CT3 / (EP23-EP12) = 5 CT3 / (EP23-EP12) = 15 Supporting figure FIG. 8 FIG. 9 FIG. 10 State High molding risk Low molding risk High molding risk

[0076] Table 1

[0077] In some embodiments of the present invention, the optical imaging lens satisfies: 0.86≤R7 / d3m≤2.13; -3.05≤R7 / R8≤-1.14; where R7 is the radius of curvature of the object side of the fourth lens, R8 is the radius of curvature of the image side of the fourth lens, and d3m is the inner diameter of the image side of the third spacer element.

[0078] By controlling the ratio of the curvature radii of the object side and the image side of the fourth lens, as well as the inner diameter of the image side of the third spacer element, the light rays from the fourth lens can be refracted and converged onto the Gaussian image plane, reducing the impact of spherical aberration on image quality and improving optical performance.

[0079] In some embodiments of the present invention, the optical imaging lens satisfies: 3.73≤d1s / (T12-CT1)≤4.94; where T12 is the air gap between the first lens and the second lens on the optical axis, CT1 is the center thickness of the first lens, and d1s is the inner diameter of the object side of the first spacer element.

[0080] By controlling the air gap between the first and second lenses on the optical axis, the influence on field curvature can be reduced; by controlling the inner diameter of the side of the first spacer element, the edge light of the optical imaging lens can be ensured not to be blocked, thus ensuring that the optical imaging lens has good relative illumination and aperture number. By controlling the relationship 3.73≤d1s / (T12-CT1)≤4.94, the relative illumination and aperture number of the optics can be effectively improved.

[0081] In some embodiments of the present invention, the optical imaging lens satisfies: 1.16≤(CT2+CP2) / EP12≤2.96; where CT2 is the center thickness of the second lens, CP2 is the maximum thickness of the second spacer element along the optical axis, and EP12 is the distance between the image side of the first spacer element and the object side of the second spacer element along the optical axis.

[0082] By controlling the center thickness of the second lens, the maximum thickness of the second spacer element along the optical axis, and the edge thickness of the second lens, the effective diameter of the second lens surface and the overall uniformity of the flange surface can be effectively controlled, which is beneficial for lens molding and filling and reduces the risk of weld lines.

[0083] In some embodiments of the present invention, the optical imaging lens satisfies: 5.20≤SAG41 / CP3≤11.20; where SAG41 is the axial displacement between the intersection of the object-side surface of the fourth lens and the optical axis and the vertex of the effective radius of the optical region of the object-side surface of the fourth lens; and CP3 is the maximum thickness of the third spacer element along the optical axis.

[0084] By controlling the relationship between the axial displacement of the fourth lens and the intersection of the object side surface and the optical axis and the vertex of the effective radius of the fourth lens's object side surface and the third spacer element, the axial height of the first few lenses can be controlled, thereby controlling the overall optical length of the entire lens and keeping the lens height within a suitable range. In addition, the maximum thickness of the third spacer element along the optical axis can adjust the thickness of its own lens flange, which is beneficial for the assembly of the entire lens.

[0085] In some embodiments of the present invention, the optical imaging lens satisfies: 148.18≤(d0m / d0s)*FOV≤237.33; where FOV is the maximum field of view of the optical imaging lens, d0m is the inner diameter of the image side of the lens barrel, and d0s is the inner diameter of the object side of the lens barrel.

[0086] By controlling the inner diameter of the image side of the lens barrel and the inner diameter of the object side of the lens barrel, it is possible to control the system so that all system light rays are incident on the image plane without obstruction, and to control the relative illumination, principal ray angle and field of view so as not to be affected, thus ensuring optical performance.

[0087] In some embodiments of the present invention, the optical imaging lens satisfies: 1.14≤(D1s-d1s) / T12≤4.26; where D1s is the outer diameter of the object side of the first spacer element, d1s is the inner diameter of the object side of the first spacer element, and T12 is the air gap between the first lens and the second lens on the optical axis.

[0088] By controlling the outer diameter and inner diameter of the object side of the first spacer element, stray light reflected from inside the first lens structure and stray light from the edge of the first lens can be blocked, preventing them from entering the second lens and reducing the risk of stray light. Controlling the air gap between the first lens and the second lens on the optical axis can adjust the uniformity of light distribution, which is beneficial to improving the imaging quality of the optical imaging lens.

[0089] In some embodiments of the present invention, the optical imaging lens satisfies: 0.30≤(D2s-d2s) / f2≤1.38; where f2 is the effective focal length of the second lens, D2s is the outer diameter of the object side of the second spacer element, and d2s is the inner diameter of the object side of the second spacer element.

[0090] By controlling the outer diameter and inner diameter of the object side of the second spacer element, stray light reflected from inside the second lens structure and stray light from the edge of the second lens can be blocked, preventing them from entering the third lens; at the same time, controlling the effective focal length of the second lens can effectively control the angle of light rays emitted from each field of view of the second lens, which is beneficial to the transmission of light.

[0091] In some embodiments of the present invention, the optical imaging lens satisfies: 3.02≤f23 / (EP23+T23)≤8.67; where f23 is the combined focal length of the second lens and the third lens, EP23 is the distance between the image side of the second spacer element and the object side of the third spacer element along the optical axis, and T23 is the air gap between the second lens and the third lens on the optical axis.

[0092] By controlling the combined focal length of the second and third lenses, the trend and direction of light between the second and third lenses can be controlled, reducing the sensitivity of the lenses. At the same time, the position and surface shape of the lenses in front of and behind the second and third lenses can be controlled and adjusted, which is beneficial to the overall symmetry of the lens structure. By controlling the distance between the second and third spacers on the optical axis and the air gap between the second and third lenses on the optical axis, the curvature of the object side of the third lens can be controlled, which is beneficial to the transmission and refraction of light.

[0093] In some embodiments of the present invention, the optical imaging lens satisfies: 2.48≤EP01 / CT1≤4.68; where CT1 is the center thickness of the first lens, and EP01 is the distance between the object side surface of the lens barrel and the object side surface of the first spacer element along the optical axis.

[0094] By controlling the distance between the side of the lens barrel and the side of the first spacer element on the optical axis through this conditional formula, the edge thickness of the first lens can be controlled, which is beneficial to the processing and forming of the lens. The first lens is thin in the middle and thick at the edge. By controlling the center thickness of the first lens, the thickness ratio of the first lens can be controlled within a suitable range, reducing the risk of weld lines on the lens appearance and stray light risk in the optical imaging lens during lens forming, and improving the appearance and imaging quality.

[0095] In some embodiments of the present invention, the optical imaging lens satisfies: 0.86≤(|SAG51|+CT5) / EP34≤2.02; where SAG51 is the axial displacement between the intersection of the object-side surface of the fifth lens and the optical axis and the vertex of the effective radius of the optical region of the object-side surface of the fifth lens, CT5 is the center thickness of the fifth lens, and EP34 is the spacing distance along the optical axis between the image-side surface of the third spacer element and the object-side surface of the fourth spacer element.

[0096] By controlling the axial displacement between the intersection of the object-side surface of the fifth lens on the optical axis and the vertex of the effective radius of the optical region of the object-side surface of the fifth lens, that is, by controlling the effective radial surface shape of the object-side surface of the fifth lens within a relatively gentle trend range, and by controlling the spacing distance between the third and fourth spacer elements in the optical axis direction, the spatial position and thickness of the flange surface of the fifth lens can be indirectly adjusted. Finally, by controlling the center thickness of the fifth lens, the structural uniformity of the fifth lens can be effectively controlled, which is beneficial to the processing and forming of the lens.

[0097] In some embodiments of the present invention, the optical imaging lens satisfies: 0.49≤(CP4+CP4b) / T45≤1.63; where T45 is the air gap between the fourth lens and the fifth lens on the optical axis, CP4b is the maximum thickness of the fourth auxiliary spacer element along the optical axis, and CP4 is the maximum thickness of the fourth spacer element along the optical axis.

[0098] By controlling the maximum thickness of the fourth spacer element and the fourth auxiliary spacer element along the optical axis, as well as the air gap between the fourth lens and the fifth lens on the optical axis, the surface shape trend of the image side and object side of the fourth and fifth lenses can be controlled, indirectly controlling the curvature of the aspherical surface, which is beneficial to the transmission and refraction of light.

[0099] In some embodiments of the present invention, the optical imaging lens satisfies: 2.15≤f45 / (d4s-d4bs)≤9.21; where d4s is the inner diameter of the object side of the fourth spacer element, d4bs is the inner diameter of the object side of the auxiliary spacer element, and f45 is the combined focal length of the fourth lens and the fifth lens.

[0100] By controlling the inner diameter of the object side of the fourth spacer element, the contact area between the fourth spacer element and the flange surface of the fourth lens can be controlled, thereby ensuring assembly stability. At the same time, stray light reflected from the flange surface of the fourth lens can be effectively blocked and intercepted, reducing the risk of stray light. By controlling the inner diameter of the object side of the fourth auxiliary spacer element, the reflection angle of light on the inner diameter slope can be changed, reducing stray light reflection to the chip. By controlling the combined focal length of the fourth and fifth lenses, the transmission angle and direction of effective light in the lens can be controlled, ensuring the angle of the emitted light and keeping the principal ray angle within the design range.

[0101] In some embodiments of the present invention, the optical imaging lens satisfies: 4.71≤d3s / (CP3+CT3)≤8.18; -2.63≤f3 / d3s≤-1.33; where d3s is the inner diameter of the object side of the third spacer element, CP3 is the maximum thickness of the third spacer element along the optical axis, CT3 is the center thickness of the third lens, and f3 is the effective focal length of the third lens.

[0102] By controlling the center thickness and effective focal length of the third lens, the transmission direction and angle of the light rays input in front of the third lens and output behind the third lens can be controlled, ensuring the principal ray angle of the optical imaging lens. By controlling the maximum thickness and inner diameter of the third spacer element along the optical axis, stray light reflected by the third lens can be blocked, reducing the risk of stray light.

[0103] The optical imaging lens according to the above embodiments of this application can employ multiple lenses, such as the five lenses mentioned above. By rationally allocating the optical power, surface shape, and arrangement of the spacers of each lens, the range of each lens-lens connection is made more uniform, enhancing the light-gathering ability and improving the imaging quality of the optical imaging lens.

[0104] In some embodiments of the present invention, the lens material in the optical imaging lens provided by the present invention can be glass or plastic. When the lens material is plastic, production costs can be effectively reduced. When the lens material is glass, the low dispersion characteristic of glass itself can effectively correct the geometric chromatic aberration of the optical imaging lens. The optical lens provided by the present invention can adopt an all-plastic lens structure, which not only gives the lens excellent imaging performance but also allows for a more compact lens structure, achieving a good balance between lens miniaturization and high image quality.

[0105] In some embodiments of the present invention, the first lens, second lens, third lens, fourth lens, and fifth lens can be spherical lenses or aspherical lenses. Compared with spherical structures, aspherical structures can effectively reduce the aberrations of optical imaging lenses, thereby reducing the number of lenses and the size of the lenses, and better achieving lens miniaturization. More specifically, the first lens, second lens, third lens, fourth lens, and fifth lens of the present invention can all be aspherical lenses, which can effectively reduce the aberrations of optical lenses, thereby reducing the number of lenses and the size of the lenses, and achieving lens miniaturization.

[0106] When an aspherical lens is used, the shapes of the aspherical surfaces of the optical lens satisfy the following equation:

[0107]

[0108] In the above formula, z is the axial distance from the vertex to the surface at a position perpendicular to the optical axis at a height y; c represents the curvature at the vertex of the aspherical surface; k is the conic coefficient; A4, A6, A8, A 10 A 12 A 14 A 16 ... represent aspherical coefficients of order 4, 6, 8, 10, 12, 14, and 16 respectively.

[0109] The present invention will be further described below with reference to several embodiments. In each embodiment, the thickness, radius of curvature, and material selection of each lens in the optical lens are different; for specific differences, please refer to the parameter tables of each embodiment. The following embodiments are merely preferred embodiments of the present invention, but the embodiments of the present invention are not limited to the following embodiments. Any changes, substitutions, combinations, or simplifications made without departing from the innovative points of the present invention should be considered equivalent substitutions and are included within the protection scope of the present invention.

[0110] Example 1

[0111] The following is for reference FIG. 2A to FIG. 3C The optical imaging lens 1001, optical imaging lens 1002 and optical imaging lens 1003 according to Embodiment 1 of this application are described. FIG. 2A , FIG. 2B and FIG. 2C Schematic diagrams of the optical imaging lens 1001, optical imaging lens 1002 and optical imaging lens 1003 according to Embodiment 1 of this application are shown respectively.

[0112] like FIG. 2A , FIG. 2B and FIG. 2C As shown, the structural schematic diagrams of optical imaging lenses 1001, 1002 and 1003 all include a lens barrel structure P0, imaging lens groups E1 to E5 and multiple spacer elements P1 to P4, as well as a second auxiliary spacer element P2b and a fourth auxiliary spacer element P4b.

[0113] In Embodiment 1, the schematic diagrams of optical imaging lenses 1001, 1002, and 1003 employ the same imaging lens group. From the object side to the image side, the imaging lens group sequentially includes: a first lens E1 with negative optical power, a second lens E2 with positive optical power, a third lens E3 with negative optical power, a fourth lens E4 with positive optical power, and a fifth lens E5 with negative optical power. Light from the object passes sequentially through surfaces S1 to S10 and is finally imaged onto the imaging surface S13. Surfaces S11 and S12 can be the object-side and image-side surfaces of filters or protective glass, OBJ (not shown in the figure) is the object distance, and STO (not shown in the figure) is the aperture stop.

[0114] Table 2 lists the relevant parameters of each lens in the optical imaging lens of this embodiment, including: surface type, radius of curvature, thickness, refractive index of the material, Abbe number and conic coefficient, wherein the units of radius of curvature and thickness are millimeters.

[0115] Surface serial number Surface type Curvature radius Thickness Refractive index Abbe number Conic coefficient OBJ Spherical surface Infinite 700.0800 S1 Aspherical surface -6.5840 0.2500 1.546 55.91 28.7263 S2 Aspherical surface 1.9287 0.5279 -13.7946 STO Spherical surface Infinite 0.0300 S3 Aspherical surface 2.4618 0.7204 1.546 55.91 -1.4910 S4 Aspherical surface -2.2422 0.3016 3.3650 S5 Aspherical surface 2.3521 0.2712 1.675 21.52 -5.0879 S6 Aspherical surface 1.4038 0.1746 -1.0062 S7 Aspherical surface 4.7357 1.2082 1.623 63.86 -35.8986 S8 Aspherical surface -1.5544 0.4800 -0.5264 S9 Aspherical surface 3.2074 0.5500 1.620 25.94 -49.2673 S10 Spherical surface 1.1232 0.2862 -6.5580 S11 Spherical surface Infinite 0.1100 1.519 64.20 S12 Spherical surface Infinite 0.7299 S13 Spherical surface Infinite

[0116] Table 2

[0117] Table 3 lists the aspherical coefficients of each aspherical lens in the optical imaging lens of this embodiment, including: A4, A6, A8, A... 10 A 12 A 14 A 16 A 18 A 20 .

[0118]

[0119]

[0120] Table 3

[0121] like FIG. 2A , FIG. 2B and FIG. 2C As shown, optical imaging lenses 1001, 1002 and 1003 each include four spacer elements and two auxiliary spacer elements. The four spacer elements are the first spacer element P1, ..., the third spacer element P3 and the fourth spacer element P4, and the two auxiliary spacer elements are the second auxiliary spacer element P2b and the fourth auxiliary spacer element P4b. The first spacer element P1 is positioned on the image side of the first lens E1 and at least partially contacts the image side of the first lens E1; the second spacer element P2 is positioned on the image side of the second lens E2 and at least partially contacts the image side of the second lens E2; the second auxiliary spacer element P2b is positioned on the image side of the second spacer element P2 and at least partially contacts the image side of the second spacer element P2; the third spacer element P3 is positioned on the image side of the third lens E3 and at least partially contacts the image side of the third lens E3; the fourth spacer element P4 is positioned on the image side of the fourth lens E4 and at least partially contacts the image side of the fourth lens E4; and the fourth auxiliary spacer element P4b is positioned on the image side of the fourth spacer element P4 and at least partially contacts the image side of the fourth spacer element P4. The spacer elements P2b and P4b, and P1 to P4, can block excess external light from entering, allowing the lens and lens barrel to better support each other, and enhancing the structural stability of the optical imaging lens 1001, optical imaging lens 1002, and optical imaging lens 1003.

[0122] The differences between optical imaging lenses 1001, 1002, and 1003 may lie in the size of the spacer element, the non-effective diameter region of the lens, and the lens barrel structural parameters. Table 4 shows the basic parameters of the spacer element and lens barrel of optical imaging lenses 1001, 1002, and 1003 in Embodiment 1. As an example, optical imaging lenses 1001, 1002, and 1003 all have a lens barrel P0.

[0123]

[0124]

[0125] Table 4

[0126] FIG. 3A The on-axis chromatic aberration curves of the optical imaging lens of Embodiment 1 are shown, which represent the deviation of the focal point of light of different wavelengths after passing through the lens. FIG. 3B The astigmatism curve of the optical imaging lens of Embodiment 1 is shown, which represents the meridional image plane curvature and the sagittal image plane curvature. FIG. 3C The magnification chromatic aberration curve of the optical imaging lens of Embodiment 1 is shown, representing the distortion magnitude corresponding to different image heights. According to... FIG. 3A to FIG. 3C As can be seen, the optical imaging lens given in Example 1 can achieve good imaging quality.

[0127] Example 2

[0128] The following is for reference FIG. 4A to FIG. 5C The optical imaging lens 2001, optical imaging lens 2002 and optical imaging lens 2003 according to Embodiment 2 of this application are described. FIG. 4A , FIG. 4B and FIG. 4C A schematic diagram of the structure of optical imaging lens 2001, optical imaging lens 2002 and optical imaging lens 2003 according to Embodiment 2 of this application is shown.

[0129] like FIG. 4A , FIG. 4B and FIG. 4C As shown, the structural schematic diagrams of optical imaging lenses 2001, 2002 and 2003 all include a lens barrel structure P0, imaging lens groups E1 to E5 and multiple spacer elements P1 to P4.

[0130] In Embodiment 2, the schematic diagrams of optical imaging lenses 2001, 2002, and 2003 employ the same imaging lens group. From the object side to the image side, the imaging lens group sequentially includes: a first lens E1 with negative optical power, a second lens E2 with positive optical power, a third lens E3 with negative optical power, a fourth lens E4 with positive optical power, and a fifth lens E5 with negative optical power. Light from the object passes sequentially through surfaces S1 to S10 and is finally imaged onto the imaging surface S13. Surfaces S11 and S12 can be the object-side and image-side surfaces of filters or protective glass, OBJ (not shown in the figure) is the object distance, and STO (not shown in the figure) is the aperture stop.

[0131] Table 5 lists the relevant parameters of each lens in the optical imaging lens of this embodiment, including: surface type, radius of curvature, thickness, refractive index of the material, Abbe number and conic coefficient, wherein the units of radius of curvature and thickness are millimeters.

[0132] Surface serial number Surface type Curvature radius Thickness Refractive index Abbe number Conic coefficient OBJ Spherical surface Infinite 700.0800 S1 Aspherical surface 0.9914 0.3426 1.546 56.14 -4.6511 S2 Aspherical surface 0.5471 0.6762 -4.8047 STO Spherical surface Infinite -0.0562 S3 Aspherical surface 2.9067 0.8492 1.546 56.14 4.3360 S4 Aspherical surface -1.8669 0.0450 2.2443 S5 Aspherical surface 3.9576 0.4247 1.686 20.37 2.2008 S6 Aspherical surface 1.7681 0.2143 -0.6615 S7 Aspherical surface 3.2645 1.1981 1.623 63.88 -12.8003 S8 Aspherical surface -1.7285 0.1996 -0.8403 S9 Aspherical surface 2.0588 0.4497 1.620 25.93 -8.8335 S10 Spherical surface 1.0876 0.8168 -1.5176 S11 Spherical surface Infinite 0.1100 1.519 64.20 S12 Spherical surface Infinite 0.4008 S13 Spherical surface Infinite

[0133] Table 5

[0134] Table 6 lists the aspherical coefficients of each aspherical lens in the optical imaging lens of this embodiment, including: A4, A6, A8, A... 10 A 12 A 14 A 16 A 18 A 20 .

[0135]

[0136]

[0137] Table 6

[0138] like FIG. 4A , FIG. 4B and FIG. 4C As shown, optical imaging lenses 2001, 2002, and 2003 each include four spacer elements, namely, the first spacer element P1, ..., the third spacer element P3, and the fourth spacer element P4. Since the positions of these four spacer elements are the same as those of the spacer elements in optical imaging lenses 1001, 1002, and 1003 of Embodiment 1, they will not be described again.

[0139] The differences between optical imaging lenses 2001, 2002, and 2003 may lie in the size of the spacer element, the non-effective diameter area of ​​the lens, and the lens barrel structural parameters. Table 7 shows the basic parameters of the spacer element and lens barrel of optical imaging lenses 2001, 2002, and 2003 in Embodiment 2. As an example, optical imaging lenses 2001, 2002, and 2003 all have a lens barrel P0.

[0140] Example two parameters Optical imaging lens 2001 Optical imaging lens 2002 Optical imaging lens 2003 d1s (mm) 1.3040 1.3140 1.2940 D1s (mm) 3.7350 3.8350 3.9350 d2s (mm) 1.5610 1.6120 1.5300 D2s (mm) 3.8150 3.9150 4.0150 d3s (mm) 2.2300 2.4280 2.1030 d3m (mm) 2.1860 2.3840 2.0590 d4s (mm) 2.7440 2.7244 2.7510 d0s (mm) 3.4610 3.6480 3.8340 d0m (mm) 5.1000 5.2790 5.3790 EP01 (mm) 1.0090 1.0590 1.1090 EP12 (mm) 0.6730 0.7530 0.6190 CP2 (mm) 0.0220 0.0220 0.0220 EP23 (mm) 0.8110 0.8420 0.7910 CP3 (mm) 0.0200 0.0210 0.0220 EP34 (mm) 0.7660 0.6050 0.6980 CP4 (mm) 0.0220 0.0220 0.0220 d4bs (mm) / / / CP4b (mm) / / /

[0141] Table 7

[0142] FIG. 5A The on-axis chromatic aberration curves of the optical imaging lens of Embodiment 2 are shown, which indicate the deviation of the focal point of light of different wavelengths after passing through the lens. FIG. 5BThe astigmatism curve of the optical imaging lens of Embodiment 2 is shown, which represents the meridional image plane curvature and the sagittal image plane curvature. FIG. 5C The magnification chromatic aberration curve of the optical imaging lens of Embodiment 2 is shown, representing the distortion magnitude corresponding to different image heights. According to... FIG. 5A to FIG. 5C It can be seen that the optical imaging lens given in Example 2 can achieve good imaging quality.

[0143] Example 3

[0144] The following is for reference FIG. 6A to FIG. 7C The optical imaging lens 3001, optical imaging lens 3002 and optical imaging lens 3003 according to Embodiment 3 of this application are described. FIG. 6A , FIG. 6B and FIG. 6C A schematic diagram of the structure of optical imaging lens 3001, optical imaging lens 3002 and optical imaging lens 3003 according to Embodiment 3 of this application is shown.

[0145] like FIG. 6A , FIG. 6B and FIG. 6C As shown, the structural schematic diagrams of optical imaging lenses 3001, 3002 and 3003 all include a lens barrel structure P0, imaging lens groups E1 to E5 and multiple spacer elements P1 to P4, as well as a first auxiliary spacer element P1b and a fourth auxiliary spacer element P4b.

[0146] In Embodiment 3, the schematic diagrams of optical imaging lenses 3001, 3002, and 3003 employ the same imaging lens group. The imaging lens group, from the object side to the image side, sequentially includes: a first lens E1 with negative optical power, a second lens E2 with positive optical power, a third lens E3 with negative optical power, a fourth lens E4 with positive optical power, and a fifth lens E5 with negative optical power. Light from the object passes sequentially through surfaces S1 to S10 and is finally imaged onto the imaging surface S12. Surfaces S11 and S12 can be the object-side and image-side surfaces of a filter or protective glass, OBJ (not shown in the figure) is the object distance, and STO (not shown in the figure) is the aperture stop.

[0147] Table 8 lists the relevant parameters of each lens in the optical imaging lens of this embodiment, including: surface type, radius of curvature, thickness, refractive index of the material, Abbe number and conic coefficient, wherein the units of radius of curvature and thickness are millimeters.

[0148]

[0149]

[0150] Table 8

[0151] Table 9 lists the aspherical coefficients of each aspherical lens in the optical imaging lens of this embodiment, including: A4, A6, A8, A... 10 A 12 A 14 A 16 A 18 A 20 .

[0152] Surface serial number [A4] [A6] [A8] A 10 ]]> A 12 ]]> S1 3.6612E-01 -5.1587E-01 7.3726E-01 -8.3195E-01 6.5955E-01 S2 2.6741E-01 2.4420E+00 -2.0469E+01 9.2136E+01 -2.5345E+02 S3 4.2399E-02 -5.0734E-01 8.1236E+00 -7.6103E+01 4.4336E+02 S4 -4.1982E-01 3.7869E+00 -2.6203E+01 1.3172E+02 -5.0402E+02 S5 -7.4707E-01 3.5239E+00 -1.9511E+01 9.8899E+01 -4.3889E+02 S6 -4.4518E-01 -4.1532E-01 9.1409E+00 -4.5223E+01 1.2204E+02 S7 -1.1692E-01 -3.5327E-01 2.2764E+00 -6.4787E+00 1.0882E+01 S8 4.6954E-02 -1.1005E-01 6.7612E-01 -2.1311E+00 3.9796E+00 S9 -5.2720E-01 2.0453E+00 -7.5405E+00 1.7051E+01 -2.3478E+01 S10 -2.6996E-01 4.5643E-01 -1.0635E+00 1.6979E+00 -1.6342E+00 Surface serial number A 14 ]]> A 16 ]]> A 18 ]]> A 20 ]]> S1 -3.4648E-01 1.1395E-01 -2.1157E-02 1.6881E-03 S2 4.3598E+02 -4.5604E+02 2.6495E+02 -6.5439E+01 S3 -1.6231E+03 3.6098E+03 -4.4336E+03 2.2963E+03 S4 1.3650E+03 -2.3666E+03 2.3146E+03 -9.6488E+02 S5 1.3713E+03 -2.6263E+03 2.7451E+03 -1.1984E+03 S6 -1.9821E+02 1.9271E+02 -1.0295E+02 2.3121E+01 S7 -1.1355E+01 7.2092E+00 -2.5435E+00 3.8168E-01 S8 -4.4541E+00 2.9257E+00 -1.0401E+00 1.5466E-01 S9 2.0140E+01 -1.0546E+01 3.0891E+00 -3.8843E-01 S10 9.6128E-01 -3.4026E-01 6.6824E-02 -5.6320E-03

[0153] Table 9

[0154] like FIG. 6A , FIG. 6B and FIG. 6C As shown, optical imaging lenses 3001, 3002, and 3003 each include four spacer elements and two auxiliary spacer elements. The four spacer elements are first spacer element P1, ..., third spacer element P3, and fourth spacer element P4. The two auxiliary spacer elements are first auxiliary spacer element P1b and fourth auxiliary spacer element P4b. The first auxiliary spacer element P1b is positioned on the image side of the first spacer element P1 and is at least partially in contact with the image side of the first spacer element P1. Since the positions of the four spacer elements and the fourth auxiliary spacer element P4b are the same as the positions of the spacer elements in optical imaging lenses 1001, 1002, and 1003 of Embodiment 1, they will not be described again.

[0155] The differences between optical imaging lenses 3001, 3002, and 3003 may lie in the size of the spacer element, the non-effective diameter region of the lens, and the lens barrel structural parameters. Table 10 shows the basic parameters of the spacer element and lens barrel of optical imaging lenses 3001, 3002, and 3003 in Embodiment 3. As an example, optical imaging lenses 3001, 3002, and 3003 all have a lens barrel P0.

[0156] Example three parameters Optical imaging lens 3001 Optical imaging lens 3002 Optical imaging lens 3003 d1s (mm) 1.9110 2.0190 2.5270 D1s (mm) 3.8980 3.9980 3.6390 d2s (mm) 1.4970 1.4970 1.4970 D2s (mm) 4.4400 4.5400 4.6400 d3s (mm) 2.2150 2.1320 2.0440 d3m (mm) 2.1710 2.0880 2.0000 d4s (mm) 3.0510 3.1980 3.4010 d0s (mm) 3.6410 3.7880 3.9360 d0m (mm) 5.0680 5.2020 5.3020 EP01 (mm) 1.1560 1.2560 1.1460 EP12 (mm) 0.6534 0.6384 0.6401 CP2 (mm) 0.0220 0.0220 0.0220 EP23 (mm) 0.7290 0.6608 0.6803 CP3 (mm) 0.0200 0.0210 0.0220 EP34 (mm) 0.4250 0.4930 0.5650 CP4 (mm) 0.5050 0.4400 0.3170 d4bs (mm) 2.5110 2.5110 2.4980 CP4b (mm) 0.0220 0.0220 0.0220

[0157] Table 10

[0158] FIG. 7A The on-axis chromatic aberration curves of the optical imaging lens of Embodiment 3 are shown, which represent the deviation of the focal point of light of different wavelengths after passing through the lens. FIG. 7B The astigmatism curve of the optical imaging lens of Embodiment 3 is shown, which represents the meridional image plane curvature and the sagittal image plane curvature. FIG. 7C The magnification chromatic aberration curve of the optical imaging lens of Embodiment 3 is shown, representing the distortion magnitude corresponding to different image heights. According to... FIG. 7A to FIG. 7CIt can be seen that the optical imaging lens given in Example 3 can achieve good imaging quality.

[0159] In summary, the optical parameters of the optical imaging lenses 1001, 1002, 1003, 2001, 2002, 2003, 3001, 3002 and 3003 of Embodiments 1 to 3 are shown in Table 11 below.

[0160]

[0161]

[0162] Table 11

[0163] The optical imaging lenses 1001, 1002, 1003, 2001, 2002, 2003, 3001, 3002 and 3003 of Embodiments 1 to 3 satisfy the relationship shown in Table 12.

[0164]

[0165] Table 12

[0166] The above description is merely a preferred embodiment of this application and an explanation of the technical principles employed. Those skilled in the art should understand that the scope of the invention involved in this application is not limited to technical solutions formed by specific combinations of the above-described technical features, but should also cover other technical solutions formed by arbitrary combinations of the above-described technical features or their equivalents without departing from the inventive concept. For example, technical solutions formed by substituting the above features with (but not limited to) technical features with similar functions disclosed in this application.

Claims

1. An optical imaging lens, comprising a lens barrel, a lens group, and a plurality of spacer elements, wherein the lens barrel is used to house the lens group and the plurality of spacer elements; characterized in that, The lens group comprises, in sequence: a first lens with negative optical power, a second lens with positive optical power, a third lens with negative optical power, a fourth lens with positive optical power, and a fifth lens with negative optical power; the first lens to the fifth lens are arranged sequentially along the optical axis from the side of the subject to the side of the imaging plane, each lens having at least one object-side surface facing the subject and one image-side surface facing the imaging plane, and there is an air gap between adjacent lenses; The plurality of spacer elements include: A first spacer element is placed on the image side of the first lens and is at least partially in contact with the image side surface of the first lens; The second spacer element is placed on the image side of the second lens and is at least partially in contact with the image side surface of the second lens; A third spacer element is placed on the image side of the third lens and is at least partially in contact with the image side surface of the third lens; A fourth spacer element is placed on the image side of the fourth lens and is at least partially in contact with the image side surface of the fourth lens; The optical imaging lens satisfies: 1.29≤CT4 / T45≤6.00; 3.76≤EP23 / (CT3-T34)≤9.48; 1.08≤CT3 / (EP23-EP12)≤12.57; Wherein, EP12 is the distance between the image side of the first spacer element and the object side of the second spacer element along the optical axis, EP23 is the distance between the image side of the second spacer element and the object side of the third spacer element along the optical axis, T34 is the air gap between the third lens and the fourth lens on the optical axis, T45 is the air gap between the fourth lens and the fifth lens on the optical axis, CT3 is the center thickness of the third lens, and CT4 is the center thickness of the fourth lens.

2. The optical imaging lens according to claim 1, characterized in that, The plurality of spacers further includes: a fourth auxiliary spacer, disposed on the image side of the fourth spacer and in at least partial contact with the image side of the fourth spacer; The optical imaging lens satisfies: 2.15≤f45 / (d4s-d4bs)≤9.21; Wherein, d4s is the inner diameter of the object side of the fourth spacer element, d4bs is the inner diameter of the object side of the fourth auxiliary spacer element, and f45 is the combined focal length of the fourth lens and the fifth lens.

3. The optical imaging lens according to claim 1, characterized in that, The optical imaging lens satisfies the following conditions: 0.86≤R7 / d3m≤2.13; -3.05≤R7 / R8≤-1.14; Wherein, R7 is the radius of curvature of the object side of the fourth lens, R8 is the radius of curvature of the image side of the fourth lens, and d3m is the inner diameter of the image side of the third spacer element.

4. The optical imaging lens according to claim 1, characterized in that, The optical imaging lens satisfies: 3.73≤d1s / (T12-CT1)≤4.94; Wherein, T12 is the air gap between the first lens and the second lens on the optical axis, CT1 is the center thickness of the first lens, and d1s is the inner diameter of the object side of the first spacer element.

5. The optical imaging lens according to claim 1, characterized in that, The optical imaging lens satisfies: 1.16≤(CT2+CP2) / EP12≤2.96; Wherein, CT2 is the center thickness of the second lens, CP2 is the maximum thickness of the second spacer element along the optical axis, and EP12 is the distance between the image side of the first spacer element and the object side of the second spacer element along the optical axis.

6. The optical imaging lens according to claim 1, characterized in that, The optical imaging lens satisfies: 148.18 ≤ (d0m / d0s) * FOV ≤ 237.33; Wherein, FOV is the maximum field of view of the optical imaging lens, d0m is the inner diameter of the image side of the lens barrel, and d0s is the inner diameter of the object side of the lens barrel.

7. The optical imaging lens according to claim 1, characterized in that, The optical imaging lens satisfies: 1.14≤(D1s-d1s) / T12≤4.26; Wherein, D1s is the outer diameter of the object side of the first spacer element, d1s is the inner diameter of the object side of the first spacer element, and T12 is the air gap between the first lens and the second lens on the optical axis.

8. The optical imaging lens according to claim 1, characterized in that, The optical imaging lens satisfies: 0.30≤(D2s-d2s) / f2≤1.38; Where f2 is the effective focal length of the second lens, D2s is the outer diameter of the object side surface of the second spacer element, and d2s is the inner diameter of the object side surface of the second spacer element.

9. The optical imaging lens according to claim 1, characterized in that, The optical imaging lens satisfies: 3.02≤f23 / (EP23+T23)≤8.67; Wherein, f23 is the combined focal length of the second lens and the third lens, EP23 is the distance between the image side of the second spacer element and the object side of the third spacer element along the optical axis, and T23 is the air gap between the second lens and the third lens on the optical axis.

10. The optical imaging lens according to claim 1, characterized in that, The optical imaging lens satisfies: 2.48≤EP01 / CT1≤4.68; Wherein, CT1 is the center thickness of the first lens, and EP01 is the distance between the object side surface of the lens barrel and the object side surface of the first spacer element along the optical axis.

Images