Optical imaging lens

Abstract

The application discloses an optical imaging lens, which comprises a lens barrel, a five-piece lens group and a spacer element group arranged in the lens barrel, the five-piece lens group comprises a first lens, a second lens, a third lens, a fourth lens and a fifth lens arranged in sequence from an object side to an image side along an optical axis, wherein the second lens is configured as a variable focal length lens; the spacer element group comprises a third spacer element in contact with an image side surface of the third lens; wherein an air gap T34 of the third lens and the fourth lens on the optical axis, a curvature radius R6 of the image side surface of the third lens, a maximum thickness CP3 of the third spacer element and an inner diameter d3s of an object side surface of the third spacer element satisfy: 12.0<T34 / CP3+d3s / R6<34.0.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of optical devices, in particular to a five-piece optical imaging lens. BACKGROUND

[0002] With the rapid development of the self-media, the application scenarios of mobile terminals are becoming more and more extensive, and the application requirements are becoming more and more complex. These all make the users have higher and higher requirements for the imaging lens of the mobile terminal. For example, when the imaging lens is applied to the application scenarios of shooting dynamic objects or switching between far and near scenes, the focusing speed of the imaging lens is particularly important for the definition of the shooting quality and the overall effect of the picture.

[0003] The traditional imaging lens usually adjusts the distance between the lens and the image plane by using a motor drive to realize focusing. However, the traditional imaging lens has a long focusing response time and a slow focusing response speed, which will result in poor dynamic shooting effect or switching effect between far and near scenes, thereby affecting the user's experience. SUMMARY

[0004] The present application provides an optical imaging lens which can at least solve or partially solve at least one problem or other problems existing in the prior art.

[0005] An aspect of the present application provides an optical imaging lens, which includes a lens barrel, and a five-piece lens group and a spacer element group arranged in the lens barrel. The five-piece lens group includes, in order from an object side to an image side along an optical axis, a first lens, a second lens, a third lens, a fourth lens, and a fifth lens. The second lens is configured as a variable focal length lens. The spacer element group includes a third spacer element in contact with an image side surface of the third lens. The air gap T34 of the third lens and the fourth lens on the optical axis, the curvature radius R6 of the image side surface of the third lens, the maximum thickness CP3 of the third spacer element, and the inner diameter d3s of the object side surface of the third spacer element satisfy: 12.0 < T34 / CP3+d3s / R6 < 34.0.

[0006] According to an example embodiment of the present application, the effective focal length f3 of the third lens, the inner diameter d3s of the object side surface of the third spacer element, and the outer diameter D3s of the object side surface of the third spacer element satisfy: -5.5 < f3 / (D3s-d3s) < -0.5.

[0007] According to an example embodiment of the present application, the effective focal length f4 of the fourth lens, the central thickness CT4 of the fourth lens on the optical axis, the curvature radius R8 of the image side surface of the fourth lens, and the inner diameter d3m of the image side surface of the third spacer element satisfy: 0 < f4 / CT4+d3m / R8 < 3.0.

[0008] According to an example embodiment of the present application, the radius of curvature R5 of the object side surface of the third lens, the radius of curvature R7 of the object side surface of the fourth lens, the outer diameter D3s of the object side surface of the third spacer element and the outer diameter D3m of the image side surface of the third spacer element satisfy: 1.5<|R5+R7| / (D3s+D3m)<13.0.

[0009] According to an example embodiment of the present application, the spacer element group further comprises a fourth spacer element in contact with the image side surface of the fourth lens, wherein the central thickness CT4 of the fourth lens on the optical axis, the interval EP34 of the third spacer element and the fourth spacer element along the optical axis, the effective focal length f4 of the fourth lens, the outer diameter D3m of the image side surface of the third spacer element and the outer diameter D4s of the object side surface of the fourth spacer element satisfy: 2.5<CT4 / EP34+f4 / |D4s-D3m|<25.0.

[0010] According to an example embodiment of the present application, the spacer element group further comprises a fourth spacer element in contact with the image side surface of the fourth lens, wherein the radius of curvature R6 of the image side surface of the third lens, the radius of curvature R8 of the image side surface of the fourth lens, the inner diameter d3m of the image side surface of the third spacer element and the inner diameter d4s of the object side surface of the fourth spacer element satisfy: 1.5<(R6-R8) / (d4s-d3m)<3.5.

[0011] According to an example embodiment of the present application, the spacer element group further comprises a fourth spacer element in contact with the image side surface of the fourth lens, wherein the inner diameter d4s of the object side surface of the fourth spacer element, the outer diameter D4s of the object side surface of the fourth spacer element and the radius of curvature R9 of the object side surface of the fifth lens satisfy: 1.0<(D4s-d4s) / R9<2.5.

[0012] According to an example embodiment of the present application, the spacer element group further comprises a fourth spacer element in contact with the image side surface of the fourth lens, wherein the effective focal length f5 of the fifth lens, the radius of curvature R10 of the image side surface of the fifth lens, the inner diameter d4m of the image side surface of the fourth spacer element and the outer diameter D4m of the image side surface of the fourth spacer element satisfy: 3.0<f5 / D4m+d4m / R10<7.1.

[0013] According to an example embodiment of the present application, the length L of the lens barrel in the direction of the optical axis, the half of the maximum field angle Semi-FOV of the optical imaging lens and the sum ∑CT of the central thicknesses of all the lenses in the first lens to the fifth lens on the optical axis satisfy: 0.5<L×Tan(Semi-FOV) / ∑CT<2.0.

[0014] According to an example embodiment of the present application, the effective focal length f1 of the first lens, the inner diameter d0sof the object-side end surface of the lens barrel, and the outer diameter D0sof the object-side end surface of the lens barrel satisfy: 0.5 < f1 / (D0s-d0s) < 2.0.

[0015] According to an example embodiment of the present application, the effective focal length f5 of the fifth lens, the inner diameter d0mof the image-side end surface of the lens barrel, and the outer diameter D0mof the image-side end surface of the lens barrel satisfy: -27.5 < f5 / (D0m-d0m) < -2.0.

[0016] According to an example embodiment of the present application, the effective focal length f2 of the second lens, the central thickness CT2 of the second lens on the optical axis, the total effective focal length f of the optical imaging lens, and the length L of the lens barrel in the direction of the optical axis satisfy: 170.0 < f2 / f+L / CT2 < 240.0.

[0017] The second lens in the present application is configured as a variable focal length lens, and the fast zooming response of the optical imaging lens can be achieved by controlling the change of the second lens, so as to obtain good focusing response speed and dynamic shooting effect, improve the use experience of the user, and the present application can also effectively control the height of the light at the third air gap by controlling the sum of the ratio of the maximum thickness of the third air gap (the air gap of the third lens and the fourth lens on the optical axis) and the third spacer element and the ratio of the inner diameter of the object-side surface of the third spacer element and the curvature radius of the image-side surface of the third lens, so that more light is in a controllable converging state, the image plane illuminance is improved, and the redundant light radiating to the mechanism part is reduced, and the probability of producing stray light is reduced. BRIEF DESCRIPTION OF DRAWINGS

[0018] Other features, objects, and advantages of the present application will become more apparent from the following detailed description of non-limiting embodiments made with reference to the accompanying drawings:

[0019] Figure 1 A structure schematic diagram of an optical imaging lens according to the present application is shown;

[0020] Figure 2 A light path schematic diagram of an optical imaging lens according to the present application is shown;

[0021] Figure 3 A structure schematic diagram of an optical imaging lens according to the first embodiment of the present application is shown;

[0022] Figure 4 A structure schematic diagram of an optical imaging lens according to the second embodiment of the first embodiment of the present application is shown;

[0023] Figures 5A to 5DOn-axis chromatic aberration curves, astigmatism curves, distortion curves and lateral chromatic aberration curves of the optical imaging lens according to the first embodiment of the present application are shown respectively;

[0024] Figure 6 A structural schematic diagram of the optical imaging lens according to the second embodiment of the present application is shown;

[0025] Figure 7 A structural schematic diagram of the optical imaging lens according to the second embodiment of the present application is shown;

[0026] Figures 8A to 8D On-axis chromatic aberration curves, astigmatism curves, distortion curves and lateral chromatic aberration curves of the optical imaging lens according to the second embodiment of the present application are shown respectively;

[0027] Figure 9 A structural schematic diagram of the optical imaging lens according to the third embodiment of the present application is shown;

[0028] Figure 10 A structural schematic diagram of the optical imaging lens according to the third embodiment of the present application is shown;

[0029] Figures 11A to 11D On-axis chromatic aberration curves, astigmatism curves, distortion curves and lateral chromatic aberration curves of the optical imaging lens according to the third embodiment of the present application are shown respectively;

[0030] Figure 12 A structural schematic diagram of the optical imaging lens according to the fourth embodiment of the present application is shown;

[0031] Figure 13 A structural schematic diagram of the optical imaging lens according to the fourth embodiment of the present application is shown; and

[0032] Figures 14A to 14D On-axis chromatic aberration curves, astigmatism curves, distortion curves and lateral chromatic aberration curves of the optical imaging lens according to the fourth embodiment of the present application are shown respectively. DETAILED DESCRIPTION

[0033] 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, same reference numbers refer to same elements.

[0034] It should be noted that the terms first, second, third, etc. in the present description are used only for distinguishing one feature from another feature, and do not denote any limitation. Thus, a first lens discussed below could also be termed a second lens or a third lens without departing from the teachings of the present application.

[0035] In the drawings, the thickness, size, and shape of the lenses have been slightly exaggerated for the sake 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.

[0036] In the present description, 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 surface of each lens closest to the object is referred to as the object side surface of the lens, and the surface of each lens closest to the image plane is referred to as the image side surface of the lens.

[0037] It should also be understood that the words "comprise", "comprising", "include", "including", and / or "contain", when used in this specification, mean that something comprises, includes or contains 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. Furthermore, when describing the embodiments of the present application, the word "can" means "one or more embodiments of the present application". Also, the word "exemplary" is intended to mean an example or an illustration.

[0038] 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 will be further understood that 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 will not be interpreted in an overly literal or overly formal sense unless expressly so defined herein.

[0039] It should be noted that the embodiments in the present application and the features in the embodiments can be combined with each other without conflict. The present application will be described in detail below with reference to the accompanying drawings and in conjunction with the embodiments.

[0040] The features, principles, and other aspects of the present application are described in detail below.

[0041] Figure 1The structural arrangement diagram and the schematic diagram of partial parameters of the optical imaging lens according to the example embodiment of the present application are shown. It should be understood by those skilled in the art that some parameters often used in the field, such as the outer diameter D3s of the object side of the third spacer element and the inner diameter d3s of the object side of the third spacer element, are not shown in the Figure 1 . Figure 1 Only partial parameters of the barrel and the spacer element of the optical imaging lens of the present application are shown exemplarily to facilitate better understanding of the present application, as shown in Figure 1 , CP3 represents the maximum thickness of the third spacer element, d3m represents the inner diameter of the image side of the third spacer element, D3m represents the outer diameter of the image side of the third spacer element, EP34 represents the interval of the third spacer element and the fourth spacer element along the optical axis, D4s represents the outer diameter of the object side of the fourth spacer element, d4s represents the inner diameter of the object side of the fourth spacer element, D4m represents the outer diameter of the image side of the fourth spacer element, d4m represents the inner diameter of the image side of the fourth spacer element, L represents the length of the barrel in the direction of the optical axis, D0s represents the outer diameter of the object side end surface of the barrel, d0s represents the inner diameter of the object side end surface of the barrel, D0m represents the outer diameter of the image side end surface of the barrel, and d0m represents the inner diameter of the image side end surface of the barrel.

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

[0043] As shown in Figures 3 to 4 , Figures 6 to 7 , Figures 9 to 10 and Figures 12 to 13 , the optical imaging lens according to the example embodiment of the present application can include a barrel and a five-piece lens group disposed in the barrel, and the five-piece lens group can include a first lens, a second lens, a third lens, a fourth lens and a fifth lens arranged in order from the object side to the image side along the optical axis. Among the first lens to the fifth lens, any two adjacent lenses can have an air interval. The second lens is configured as a variable focal length lens. By configuring the second lens as a variable focal length lens, the fast zooming response of the optical imaging lens can be achieved by controlling the change of the second lens with an electrical signal, so as to obtain a good focusing response speed and a dynamic shooting effect, and improve the user experience.

[0044] The optical imaging lens can further include a spacer element group disposed in the lens barrel, and the spacer element group can include a third spacer element in contact with an image side surface of the third lens. In addition, an air separation T34 between the third lens and the fourth lens on the optical axis, a curvature radius R6 of the image side surface of the third lens, a maximum thickness CP3 of the third spacer element, and an inner diameter d3s of an object side surface of the third spacer element can satisfy 12.0 < T34 / CP3+d3s / R6 < 34.0. The air separation between the third lens and the fourth lens on the optical axis is a third air separation. By controlling the sum of the ratio of the third air separation to the maximum thickness of the third spacer element and the ratio of the inner diameter of the object side surface of the third spacer element to the curvature radius of the image side surface of the third lens, the height of the light rays at the third air separation is effectively controlled, so that more light rays are in a controllable converging state, the image plane illuminance is improved, and at the same time, the excessive light rays directed to the mechanism part are reduced, and the probability of stray light generation is reduced.

[0045] In other examples, the spacer element group can further include a fourth spacer element in contact with an image side surface of the fourth lens. Reasonable use of the spacer element can effectively avoid the risk of stray light, reduce the interference with the image quality, and thus improve the imaging quality of the optical imaging lens.

[0046] In other examples, the third spacer element can be disposed between the third lens and the fourth lens, and the fourth spacer element can be disposed between the fourth lens and the fifth lens. In an example, the third spacer element and the fourth lens can further include a third auxiliary spacer element in contact with an image side surface of the third spacer element, and the fourth spacer element and the fifth lens can further include a fourth auxiliary spacer element in contact with an image side surface of the fourth spacer element.

[0047] In other examples, the third spacer element and the fourth spacer element can be a spanning spacer element, i.e., the side of the third spacer element and the fourth spacer element close to the lens barrel can be connected together.

[0048] In an example embodiment, the effective focal length f3 of the third lens, the inner diameter d3s of the object side surface of the third spacer element, and the outer diameter D3s of the object side surface of the third spacer element can satisfy -5.5 < f3 / (D3s-d3s) < -0.5. By controlling the relationship between the effective focal length of the third lens and the inner and outer diameters of the object side surface of the third spacer element, reasonable third spacer element ring data can be obtained while ensuring the light adjusting ability of the third lens and reducing the sensitivity of the optical imaging lens, effectively improving the processability and deformation resistance of the third spacer element.

[0049] In exemplary embodiments, the effective focal length f4 of the fourth lens, the central thickness CT4 of the fourth lens on the optical axis, the curvature radius R8 of the image side surface of the fourth lens, and the inner diameter d3m of the image side surface of the third spacer element can satisfy: 0 < f4 / CT4+d3m / R8 < 3.0. By controlling the effective focal length of the fourth lens, the central thickness of the fourth lens on the optical axis, the curvature radius of the image side surface of the fourth lens, and the inner diameter of the image side surface of the third spacer element, the diameter of the light rays entering the fourth lens can be effectively controlled, the edge light rays can be shielded, and the deflection angle of the light rays at the fourth lens can be reduced, so that the diameter of the light rays entering the next lens (i.e., the fifth lens) is within a controllable range, thereby reducing the sensitivity of the optical imaging lens.

[0050] In exemplary embodiments, the curvature radius R5 of the object side surface of the third lens, the curvature radius R7 of the object side surface of the fourth lens, the outer diameter D3s of the object side surface of the third spacer element, and the outer diameter D3m of the image side surface of the third spacer element can satisfy: 1.5 < |R5+R7| / (D3s+D3m) < 13.0. By controlling the curvature radius of the object side surfaces of the third lens and the fourth lens, and the outer diameters of the object side surface and the image side surface of the third spacer element, reasonable lens parameters can be obtained, the lens has better processability, the deflection angle of the chief ray can be reasonably controlled, the optical imaging lens has strong astigmatism balancing capability, and the optical imaging lens is miniaturized.

[0051] In exemplary embodiments, the central thickness CT4 of the fourth lens on the optical axis, the interval EP34 of the third spacer element and the fourth spacer element along the optical axis, the effective focal length f4 of the fourth lens, the outer diameter D3m of the image side surface of the third spacer element, and the outer diameter D4s of the object side surface of the fourth spacer element can satisfy: 2.5 < CT4 / EP34+f4 / |D4s-D3m| < 25.0. By controlling the central thickness, the edge thickness of the fourth lens, and the mutual relationship between the outer diameter of the image side surface of the third spacer element and the outer diameter of the object side surface of the fourth spacer element, the step distribution gradient can be reasonably constrained while the thickness ratio of the fourth lens is limited within a certain processing range, avoiding the formation of a large step structure between the third lens and the fifth lens, improving the assembly stability of the optical imaging lens, and the effective focal length of the fourth lens can be reasonably controlled to improve the overall brightness of the optical imaging lens.

[0052] In an exemplary embodiment, the radius of curvature R6 of the image side surface of the third lens, the radius of curvature R8 of the image side surface of the fourth lens, the inner diameter d3m of the image side surface of the third spacer element, and the inner diameter d4s of the object side surface of the fourth spacer element can satisfy: 1.5 < (R6-R8) / (d4s-d3m) < 3.5. By controlling the radius of curvature of the image side surfaces of the third lens and the fourth lens, and the mutual relationship between the inner diameter of the image side surface of the third spacer element and the inner diameter of the object side surface of the fourth spacer element, the coma contribution rate of the third lens and the fourth lens can be limited within a reasonable range while effectively suppressing the generation of internal reflection stray light of the third lens and the fourth lens, thereby well balancing the coma generated by the first lens and the second lens, and ensuring that the optical imaging lens has good imaging quality.

[0053] In an exemplary embodiment, the inner diameter d4s of the object side surface of the fourth spacer element, the outer diameter D4s of the object side surface of the fourth spacer element, and the radius of curvature R9 of the object side surface of the fifth lens can satisfy: 1.0 < (D4s-d4s) / R9 < 2.5. By controlling the mutual relationship between the inner and outer diameters of the object side surface of the fourth spacer element and the radius of curvature of the object side surface of the fifth lens, the fourth spacer element can have good ability to absorb marginal rays while ensuring that the fifth lens has good processability and reduces surface profile asperity, effectively correcting system chromatic aberration, and achieving balance of various aberrations, thereby improving the imaging quality of the optical imaging lens.

[0054] In an exemplary embodiment, the effective focal length f5 of the fifth lens, the radius of curvature R10 of the image side surface of the fifth lens, the inner diameter d4m of the image side surface of the fourth spacer element, and the outer diameter D4m of the image side surface of the fourth spacer element can satisfy: 3.0 < f5 / D4m+d4m / R10 < 7.1. By controlling the effective focal length and the radius of curvature of the image side surface of the fifth lens, the degree of bending of the fifth lens can be effectively controlled, the processability of the fifth lens is improved, and the contribution of the field curvature of the fifth lens can be within a reasonable range, reducing the optical sensitivity of the fifth lens in the system, while the inner and outer diameters of the image side surface of the fourth spacer element are controlled to ensure that the optical imaging lens has sufficient light throughput and improves the signal-to-noise ratio of the optical imaging lens.

[0055] In the example embodiment, the length L of the lens barrel in the direction of the optical axis, half of the maximum field angle Semi-FOV of the optical imaging lens, and the sum ∑CT of the center thicknesses of all the lenses in the first to fifth lenses on the optical axis can satisfy: 0.5 < L x Tan(Semi-FOV) / ∑CT < 2.0. By controlling the maximum field angle of the optical imaging lens, the optical imaging lens can have good balanced aberration capability, and the deflection angle of the chief ray can be reasonably controlled, thereby improving the matching degree with the chip. At the same time, by controlling the length of the lens barrel in the direction of the optical axis and the sum of the center thicknesses of all the lenses on the optical axis, the total optical length of the optical imaging lens can be effectively controlled, and the miniaturization and light weight of the optical imaging lens can be realized.

[0056] In the example embodiment, the effective focal length f1 of the first lens, the inner diameter d0s of the object side end surface of the lens barrel, and the outer diameter D0s of the object side end surface of the lens barrel can satisfy: 0.5 < f1 / (D0s - d0s) < 2.0. By controlling the effective focal length of the first lens to generate a target spherical aberration, the spherical aberration generated by other lenses of the optical imaging lens can be balanced, the imaging effect of the optical imaging lens on the optical axis can be improved, and the amount of light entering the optical imaging lens can be effectively controlled by controlling the inner and outer diameters of the object side end surface of the lens barrel, thereby improving the main value parameter and enabling the size of the outer circle of the object side end of the lens barrel to be controlled within a required range, and the visual effect of the optical imaging lens can be improved.

[0057] In the example embodiment, the effective focal length f5 of the fifth lens, the inner diameter d0m of the image side end surface of the lens barrel, and the outer diameter D0m of the image side end surface of the lens barrel can satisfy: -27.5 < f5 / (D0m - d0m) < -2.0. By controlling the effective focal length of the fifth lens, the image plane landing position can be controlled to a required position, thereby further reducing the height of the module, enabling the optical imaging lens to adapt to more application scenarios, and a more uniform thickness of the tail end of the lens barrel can be obtained by controlling the inner and outer diameters of the image side end surface of the lens barrel, so that the lens barrel has a more stable bearing when testing the MTF performance.

[0058] In the example embodiment, the effective focal length f2 of the second lens, the center thickness CT2 of the second lens on the optical axis, the total effective focal length f of the optical imaging lens, and the length L of the lens barrel in the direction of the optical axis can satisfy: 170.0 < f2 / f + L / CT2 < 240.0. By controlling the ratio of the effective focal length of the second lens to the total effective focal length of the optical imaging lens, the size of the aperture of the optical imaging lens can be limited within a certain range, the overall brightness of the optical imaging lens can be improved, and a more reasonable mechanical back focal length can be obtained, so that the image plane is closer to the lens, a shorter module height is obtained, and the on-axis chromatic aberration of the optical imaging lens can be effectively reduced by controlling the center thickness of the second lens on the optical axis, thereby improving the imaging quality of the optical imaging lens.

[0059] In the exemplary embodiments, the optical imaging lens further comprises a diaphragm, which can be arranged between the object side and the first lens according to actual needs.

[0060] The optical imaging lens according to the above-described embodiments of the present application can adopt five lenses and at least one spacer element. By reasonably allocating the parameters of each lens and each spacer element, the miniaturization of the optical imaging lens can be achieved, the sensitivity of the optical imaging lens can be reduced, the stray light phenomenon of the optical imaging lens can be improved, and the assembly stability and the imaging quality of the optical imaging lens can be improved.

[0061] In the embodiments of the present application, at least one of the mirror surfaces of each lens among the first lens to the fifth lens is a non-spherical mirror surface. The non-spherical lens has the characteristic that the curvature continuously changes from the center of the lens to the periphery of the lens. Unlike the spherical lens having a constant curvature from the center of the lens to the periphery of the lens, the non-spherical lens has a better curvature radius characteristic, has the advantages of improving the distortion aberration and improving the astigmatism aberration. After using the non-spherical lens, the aberration that occurs during imaging can be eliminated as much as possible, and thus the imaging quality can be improved. Alternatively, the object side and the image side of each lens among the first lens, the third lens to the fifth lens are non-spherical mirror surfaces.

[0062] However, those skilled in the art should understand that the number of lenses and spacer elements constituting the optical imaging lens can be changed without departing from the technical solutions claimed by the present application, to obtain the various results and advantages described in the present specification.

[0063] The specific embodiments of the optical imaging lens applicable to the above-described embodiments are further described below with reference to the accompanying drawings.

[0064] First embodiment

[0065] The following refers to Figures 3 to 5D The optical imaging lens according to the first embodiment of the present application is described. Figure 3 The structural schematic diagram of the optical imaging lens 110 according to the first embodiment of the present application is shown; Figure 4 The structural schematic diagram of the optical imaging lens 120 according to the second embodiment of the first embodiment of the present application is shown.

[0066] As Figure 3 and Figure 4As shown, the optical imaging lens 110, 120 each includes a lens barrel P0 and a five-piece lens group and a spacer element group disposed in the lens barrel P0, the five-piece lens group sequentially includes, from the object side to the image side, a first lens E1, a second lens E2, a third lens E3, a fourth lens E4 and a fifth lens E5. A stop STO can be disposed between the object side and the first lens E1 according to actual needs. The spacer element group includes a third spacer element P3 and a fourth spacer element P4. The spacer element can block the excess light in the imaging process from entering the next lens, and at the same time make the lens and the lens barrel P0 better abut, thereby enhancing the structural stability of the optical imaging lens.

[0067] The first lens E1 has positive refractive power, the object side S1 is a convex surface, and the image side S2 is a convex surface. The second lens E2 is configured as a variable focal length lens, the variable focal length lens includes a shape changing part and a glass cover plate, the shape changing part has an object side S3 (not shown) and an image side S4 (not shown), and the glass cover plate has an object side S5 (not shown) and an image side S6 (not shown). Among them, the glass cover plate constantly maintains the shape of the image side of the variable focal length lens, and the shape changing part is used to change the shape or the radius of curvature of the object side of the variable focal length lens, so as to change the focal length of the variable focal length lens. For example, the shape changing part can change the object side of the variable focal length lens to be convex or concave, so that the refractive power of the variable focal length lens changes to be positive or negative. For another example, the shape changing part can change the focal length of the variable focal length lens by increasing or decreasing the radius of curvature of the object side of the variable focal length lens. The third lens E3 has negative refractive power, the object side S7 is a convex surface, and the image side S8 is a concave surface. The fourth lens E4 has positive refractive power, the object side S9 is a concave surface, and the image side S10 is a convex surface. The fifth lens E5 has negative refractive power, the object side S11 is a convex surface, and the image side S12 is a concave surface. The filter has an object side S13 (not shown) and an image side S14 (not shown). The light from the object sequentially passes through each surface S1 to S14 according to the optical path M as shown and is finally imaged on the imaging surface S15. Figure 2 The optical path M as shown.

[0068] Table 1 shows the basic parameter table of the optical imaging lens of the first embodiment, wherein the units of the radius of curvature, the thickness / distance are all millimeters (mm).

[0069]

[0070] Table 1

[0071] In the first embodiment, the object side and the image side of any one of the first lens E1, the third lens E3 to the fifth lens E5 are aspherical surfaces, and the surface type x of each aspherical surface can be defined by, but not limited to, the following aspherical surface formula:

[0072]

[0073] wherein x is the sag of the aspherical surface at a position along the optical axis at a height h from the vertex of the aspherical surface; c is the paraxial curvature of the aspherical surface, c = 1 / R (i.e., the paraxial curvature c is the inverse of the curvature radius R in Table 1); k is the conic coefficient; and Ai is the correction coefficient of the i-th order of the aspherical surface. Table 2 gives the high-order term coefficients A4, A6, A8, A10, and A12 that can be used in the aspherical surfaces S1-S2, S7-S12 of the optical imaging lens 110 and 120 in the first embodiment. 10 12 14 16 18 20 22 24 26 28 30 .

[0074] Face number A4 A6 A8 A10 A12 A14 A16 S1 -7.5654E-04 1.4843E-04 -2.6599E-04 -6.0705E-05 -7.6119E-06 -2.8061E-05 -1.9297E-05 S2 -2.4864E-02 5.4355E-04 -1.3717E-03 -1.3457E-04 6.4028E-05 1.6891E-05 5.8103E-06 S7 -2.5517E-01 3.8958E-03 -1.4062E-03 2.6209E-04 -1.3526E-04 1.1780E-04 -6.7999E-05 S8 -3.2206E-01 1.6573E-03 -3.5342E-03 -2.9127E-04 1.2119E-05 9.7445E-05 8.5148E-06 S9 3.8920E-02 7.4131E-03 -3.6643E-03 -8.5014E-04 -5.7782E-05 7.7928E-05 -9.2468E-05 S10 2.3131E-01 6.0544E-02 5.1161E-03 -5.8596E-04 -8.7808E-04 -4.0060E-05 1.0330E-04 S11 -2.2884E+00 7.2113E-01 -2.2134E-01 6.0270E-02 -1.6650E-02 5.4886E-03 -2.3477E-03 S12 -4.2838E+00 9.4316E-01 -2.5968E-01 1.1036E-01 -4.7531E-02 1.8609E-02 -9.5229E-03 Face number A18 A20 A22 A24 A26 A28 A30 S1 -4.3442E-06 1.9838E-05 3.4202E-05 3.9215E-05 2.8493E-05 1.6130E-05 5.7069E-06 S2 -5.0342E-05 -3.7147E-05 -3.5055E-05 -5.6884E-06 -6.6917E-06 -2.0181E-06 -1.4964E-06 S7 6.7871E-05 3.4398E-06 5.2816E-05 1.9702E-05 3.5890E-05 1.0907E-05 1.5357E-05 S8 2.8253E-05 -1.9448E-05 -1.9733E-05 -2.3863E-05 -1.4083E-05 -7.9867E-06 -4.9326E-06 S9 2.8979E-05 -2.3600E-05 2.0232E-05 -7.3813E-06 1.9110E-05 -2.3828E-06 1.1621E-05 S10 2.2553E-05 1.1622E-05 -1.2555E-05 3.6989E-06 -8.9098E-06 8.2096E-06 -2.0386E-06 S11 6.5712E-04 9.6341E-05 -1.6165E-04 1.2140E-04 -1.0055E-04 1.9374E-05 5.6966E-06 S12 3.4364E-03 -2.0355E-03 6.7125E-04 -2.7299E-04 2.0696E-04 -1.9889E-05 3.4941E-06

[0075] Table 2

[0076] The optical imaging lenses 110 and 120 in Examples 1 and 2 of the first embodiment differ in the structural dimensions of the lens barrels and the spacer elements included. Table 3 gives some basic parameters of the lens barrels and the spacer elements of the optical imaging lenses 110 and 120 in the first embodiment, such as CP3, D3s, d3s, d3m, D3m, EP34, D4s, d4s, D4m, d4m, L, D0s, d0s, D0m, and d0m, etc. The basic parameters listed in Table 3 are measured according to the labeling method shown in FIG. 3, and the units of the basic parameters listed in Table 3 are all millimeters (mm). Figure 1

[0077]

[0078]

[0079] Table 3

[0080] Figure 5A FIGS. 13A and 13B show the on-axis chromatic aberration curves of the optical imaging lenses 110 and 120 in the first embodiment, which represent the convergence point deviations of light rays of different wavelengths after passing through the optical imaging lenses 110 and 120. Figure 5B FIGS. 14A and 14B show the astigmatism curves of the optical imaging lenses 110 and 120 in the first embodiment, which represent the meridional image surface curvature and sagittal image surface curvature corresponding to different image heights. Figure 5C FIGS. 15A and 15B show the distortion curves of the optical imaging lenses 110 and 120 in the first embodiment, which represent the distortion size values corresponding to different image heights.​​​​​​​​​​​Figure 5D The magnification chromatic aberration curves of the optical imaging lenses 110 and 120 of the first embodiment are shown, which represent the deviation of different image heights of light rays after passing through the lenses on the imaging plane. According to the formula: Figures 5A to 5D It can be known that the optical imaging lenses 110 and 120 given by the first embodiment can achieve good imaging quality.

[0081] Second embodiment

[0082] The optical imaging lens according to the second embodiment of the present application is described below. Figures 6 to 8D The optical imaging lens according to the second embodiment of the present application is described below. Figure 6 The structural schematic diagram of the optical imaging lens 210 according to the second embodiment of the present application is shown. Figure 7 The structural schematic diagram of the optical imaging lens 220 according to the second embodiment of the present application is shown.

[0083] As shown in Figure 6 and Figure 7 The optical imaging lenses 210 and 220 each include a lens barrel P0, and a five-piece lens group and a spacer element group arranged in the lens barrel P0. The five-piece lens group sequentially includes, from the object side to the image side, a first lens E1, a second lens E2, a third lens E3, a fourth lens E4, and a fifth lens E5. A stop STO can be arranged between the object side and the first lens E1 according to actual needs. The spacer element group includes a third spacer element P3 and a fourth spacer element P4. The spacer element can block the excess light rays in the imaging process from entering the next lens, and make the lens and the lens barrel P0 better abut, thereby enhancing the structural stability of the optical imaging lens.

[0084] The first lens E1 has positive optical power, with its object-side surface S1 being convex and its image-side surface S2 being convex. The second lens E2 is configured as a variable focal length lens, comprising a shape-changing section and a glass cover. The shape-changing section has an object-side surface S3 (not shown) and an image-side surface S4 (not shown), and the glass cover has an object-side surface S5 (not shown) and an image-side surface S6 (not shown). The glass cover constantly maintains the shape of the image-side surface of the variable focal length lens. The shape-changing section is used to change the shape or radius of curvature of the object-side surface of the variable focal length lens, thereby changing the focal length of the variable focal length lens. For example, the shape-changing section can change the object-side surface of the variable focal length lens to be convex or concave, thereby changing the optical power of the variable focal length lens to a positive or negative value. Alternatively, the shape-changing section can change the focal length of the variable focal length lens by increasing or decreasing the radius of curvature of the object-side surface of the variable focal length lens. The third lens E3 has negative optical power, with its object-side surface S7 being concave and its image-side surface S8 being concave. The fourth lens E4 has positive optical power, with its object-side surface S9 being concave and its image-side surface S10 being convex. The fifth lens E5 has negative optical power, with its object-side surface S11 being convex and its image-side surface S12 being concave. The filter has an object-side surface S13 (not shown) and an image-side surface S14 (not shown). Light from the object follows the... Figure 2 The light path M shown passes through surfaces S1 to S14 in sequence and is finally imaged on the imaging surface S15.

[0085] Table 4 shows the basic parameters of the optical imaging lens of the second embodiment, where the units for radius of curvature and thickness / distance are millimeters (mm).

[0086]

[0087] Table 4

[0088] In the second embodiment, the object-side surface and image-side surface of any one of the first lens E1, the third lens E3 to the fifth lens E5 are aspherical. Table 5 shows the higher-order coefficients A4, A6, A8, and A6 of each aspherical mirror S1-S2 and S7-S12 that can be used in the second embodiment. 10 A 12 A 14 A 16 A 18 A 20 A 22 A 24 A 26 A 28 and A 30 .

[0089] Face number A4 A6 A8 A10 A12 A14 A16 S1 -1.9715E-02 -1.4996E-03 -1.3758E-04 -1.8625E-05 -1.5359E-06 -9.6019E-07 4.0186E-07 S2 -2.6542E-02 -2.1991E-03 -2.3483E-04 -4.5941E-05 1.0753E-06 -5.1543E-06 1.5626E-06 S7 -5.8878E-02 1.3185E-02 -5.5256E-04 -2.1928E-04 -1.9516E-04 -2.8272E-05 4.4378E-05 S8 -7.9778E-02 1.0680E-02 -2.2772E-03 -9.1321E-04 -7.4516E-04 -4.3402E-04 -2.0335E-04 S9 -3.7852E-02 1.4262E-04 2.4403E-04 -3.1552E-05 -1.6679E-05 4.6051E-06 2.2279E-06 S10 -7.0285E-02 5.5736E-02 -1.1070E-02 6.1107E-03 -2.0564E-03 8.2558E-04 -2.8686E-04 S11 -2.2477E+00 5.6644E-01 -1.5507E-01 5.4541E-02 -2.3334E-02 7.4159E-03 -3.4737E-03 S12 -4.7107E+00 1.0072E+00 -3.1362E-01 1.1692E-01 -5.8144E-02 3.0452E-02 -8.5571E-03 Face number A18 A20 A22 A24 A26 A28 A30 S1 -2.7123E-07 2.5317E-07 -1.3523E-07 9.8245E-08 -1.1050E-07 2.0644E-08 3.9252E-08 S2 -2.6326E-06 8.6805E-07 -2.3450E-06 5.5347E-07 2.8353E-07 1.1060E-06 -5.9660E-07 S7 4.4305E-05 1.3085E-05 3.7037E-06 -1.3789E-06 7.0034E-07 -1.0726E-06 3.7343E-07 S8 -5.8745E-05 -1.3257E-05 1.2325E-06 -6.5672E-07 -1.1889E-07 -1.1131E-07 -2.3271E-07 S9 -1.2695E-06 3.7140E-07 -1.1104E-06 -1.1358E-06 -1.5940E-06 -1.0196E-09 0.0000E+00 S10 1.2746E-04 -3.9993E-05 1.0933E-05 -1.4800E-05 1.1073E-06 1.9844E-06 -5.9748E-08 S11 1.3799E-03 2.3247E-05 -2.5115E-05 -3.6362E-05 -1.4719E-04 1.0779E-04 -1.9032E-05 S12 7.5778E-03 -6.5338E-03 -2.5421E-03 -3.8430E-03 -5.1534E-04 -1.8280E-04 2.2166E-04

[0090] Table 5

[0091] The optical imaging lenses 210 and 220 in Examples 1 and 2 of the second embodiment differ in the structural dimensions of the included lens barrels and spacer elements. Table 6 lists some basic parameters of the lens barrels and spacer elements of the optical imaging lenses 210 and 220 of the second embodiment, such as CP3, D3s, d3s, d3m, D3m, EP34, D4s, d4s, D4m, d4m, L, D0s, d0s, D0m, and d0m, etc. The basic parameters listed in Table 6 are measured according to the labeling method shown in Table 1, and the basic parameters listed in Table 6 all have units of millimeters (mm). Figure 1 The basic parameters listed in Table 6 are measured according to the labeling method shown in Table 1, and the basic parameters listed in Table 6 all have units of millimeters (mm).

[0092]

[0093] Table 6

[0094] Figure 8A The on-axis chromatic aberration curves of the optical imaging lenses 210 and 220 of the second embodiment are shown, which represent the convergence point deviations of light rays of different wavelengths after passing through the optical imaging lenses 210 and 220. Figure 8B The astigmatism curves of the optical imaging lenses 210 and 220 of the second embodiment are shown, which represent the meridional image surface curvatures and sagittal image surface curvatures corresponding to different image heights. Figure 8C The distortion curves of the optical imaging lenses 210 and 220 of the second embodiment are shown, which represent the distortion size values corresponding to different image heights. Figure 8D The lateral chromatic aberration curves of the optical imaging lenses 210 and 220 of the second embodiment are shown, which represent the deviations of light rays on the imaging surface after passing through the lenses at different image heights. According to the lateral chromatic aberration curves, the lateral chromatic aberration of the optical imaging lenses 210 and 220 of the second embodiment is less than 0.02 mm. Figures 8A to 8D It can be seen that the optical imaging lenses 210 and 220 of the second embodiment can achieve good imaging quality.

[0095] Third embodiment

[0096] The following refers to Figures 9 to 11D An optical imaging lens according to a third embodiment of the present application is described. Figure 9 A structural schematic diagram of an optical imaging lens 310 according to Example 1 of the third embodiment of the present application is shown; Figure 10 A structural schematic diagram of an optical imaging lens 320 according to Example 2 of the third embodiment of the present application is shown.

[0097] As Figure 9 and Figure 10As shown, optical imaging lenses 310 and 320 both include a lens barrel P0 and a five-element lens group and a spacer element group housed within the lens barrel P0. The five-element lens group, from the object side to the image side, includes: a first lens E1, a second lens E2, a third lens E3, a fourth lens E4, and a fifth lens E5. The aperture stop STO can be positioned between the object side and the first lens E1 as needed. The spacer element group includes: a third spacer element P3 and a fourth spacer element P4. The spacer elements can block excess light from entering the next lens during the imaging process, while also allowing the lens to better contact the lens barrel P0, thus enhancing the structural stability of the optical imaging lens.

[0098] The first lens E1 has positive optical power, with its object-side surface S1 being concave and its image-side surface S2 being convex. The second lens E2 is configured as a variable focal length lens, comprising a shape-changing section and a glass cover. The shape-changing section has an object-side surface S3 (not shown) and an image-side surface S4 (not shown), and the glass cover has an object-side surface S5 (not shown) and an image-side surface S6 (not shown). The glass cover constantly maintains the shape of the image-side surface of the variable focal length lens. The shape-changing section is used to change the shape or radius of curvature of the object-side surface of the variable focal length lens, thereby changing the focal length of the variable focal length lens. For example, the shape-changing section can change the object-side surface of the variable focal length lens to be convex or concave, thus changing the optical power of the variable focal length lens to a positive or negative value. Alternatively, the shape-changing section can change the focal length of the variable focal length lens by increasing or decreasing the radius of curvature of the object-side surface. The third lens E3 has negative optical power, with its object-side surface S7 being convex and its image-side surface S8 being concave. The fourth lens E4 has positive optical power, with its object-side surface S9 being concave and its image-side surface S10 being convex. The fifth lens E5 has negative optical power, with its object-side surface S11 being convex and its image-side surface S12 being concave. The filter has an object-side surface S13 (not shown) and an image-side surface S14 (not shown). Light from the object follows the... Figure 2 The light path M shown passes through surfaces S1 to S14 in sequence and is finally imaged on the imaging surface S15.

[0099] Table 7 shows the basic parameters of the optical imaging lens of the third embodiment, where the units for radius of curvature and thickness / distance are millimeters (mm).

[0100]

[0101] Table 7

[0102] In the third embodiment, the object-side surface and image-side surface of any one of the first lens E1, the third lens E3 to the fifth lens E5 are aspherical. Table 8 gives the higher-order coefficients A4, A6, A8, and A6 of each aspherical mirror S1-S2, S7-S12 that can be used in the third embodiment. 10 A12 14 16 18 20 22 24 26 28 30 .

[0103]

[0104]

[0105] Table 8

[0106] The optical imaging lenses 310 and 320 in Examples 1 and 2 of the third embodiment differ in the structural dimensions of the included lens barrels and spacer elements. Table 9 gives some basic parameters of the lens barrels and spacer elements of the optical imaging lenses 310 and 320 of the third embodiment, such as CP3, D3s, d3s, d3m, D3m, EP34, D4s, d4s, D4m, d4m, L, D0s, d0s, D0m, and d0m, etc. The basic parameters listed in Table 9 are measured according to the labeling method shown in Table 8, and the units of the basic parameters listed in Table 9 are all in millimeters (mm). Figure 1

[0107]

[0108] Table 9

[0109] Figure 11A The on-axis chromatic aberration curves of the optical imaging lenses 310 and 320 of the third embodiment are shown, which represent the convergence point deviations of light rays of different wavelengths after passing through the optical imaging lenses 310 and 320. Figure 11B The astigmatism curves of the optical imaging lenses 310 and 320 of the third embodiment are shown, which represent the meridional image surface curvatures and sagittal image surface curvatures corresponding to different image heights. Figure 11C The distortion curves of the optical imaging lenses 310 and 320 of the third embodiment are shown, which represent the distortion size values corresponding to different image heights. Figure 11D The magnification chromatic aberration curves of the optical imaging lenses 310 and 320 of the third embodiment are shown, which represent the deviations of different image heights on the imaging surface after the light rays pass through the lenses. According to Figures 11A to 11D It can be known that the optical imaging lenses 310 and 320 of the third embodiment can achieve good imaging quality.

[0110] Fourth embodiment

[0111] The following refers to Figures 12 to 14D ​​​​​​​​​​An optical imaging lens according to a fourth embodiment of the present application is described. Figure 12 A structural diagram of the optical imaging lens 410 according to the embodiment 1 of the fourth embodiment of the present application is shown. Figure 13 A structural diagram of the optical imaging lens 420 according to the embodiment 2 of the fourth embodiment of the present application is shown.

[0112] As shown in Figure 12 and Figure 13 The optical imaging lens 410, 420 each includes a lens barrel P0, and a five-piece lens group and a spacer element group disposed in the lens barrel P0. The five-piece lens group includes, in order from the object side to the image side, a first lens E1, a second lens E2, a third lens E3, a fourth lens E4, and a fifth lens E5. A stop STO can be disposed between the object side and the first lens E1 according to actual needs. The spacer element group includes a third spacer element P3 and a fourth spacer element P4. In an example, the spacer element group can further include a fourth auxiliary spacer element P4b. The spacer element can block the excess light rays in the imaging process from entering the next lens, and at the same time make the lens and the lens barrel P0 better abut, thereby enhancing the structural stability of the optical imaging lens.

[0113] The first lens E1 has positive refractive power, and its object side surface S1 is a convex surface and its image side surface S2 is a concave surface. The second lens E2 is configured as a variable focal length lens, which includes a shape changing part having an object side surface S3 (not shown) and an image side surface S4 (not shown), and a glass cover plate having an object side surface S5 (not shown) and an image side surface S6 (not shown). The glass cover plate constantly maintains the shape of the image side surface of the variable focal length lens, and the shape changing part is used to change the shape or the radius of curvature of the object side surface of the variable focal length lens, so as to change the focal length of the variable focal length lens. For example, the shape changing part can change the object side surface of the variable focal length lens to be a convex surface or a concave surface, so that the refractive power of the variable focal length lens changes to be positive or negative. For another example, the shape changing part can change the focal length of the variable focal length lens by increasing or decreasing the radius of curvature of the object side surface of the variable focal length lens. The third lens E3 has negative refractive power, and its object side surface S7 is a convex surface and its image side surface S8 is a concave surface. The fourth lens E4 has positive refractive power, and its object side surface S9 is a concave surface and its image side surface S10 is a convex surface. The fifth lens E5 has negative refractive power, and its object side surface S11 is a convex surface and its image side surface S12 is a concave surface. The filter has an object side surface S13 (not shown) and an image side surface S14 (not shown). The light from the object sequentially passes through the surfaces S1 to S14 according to the optical path M shown in Figure 2 and finally forms an image on the imaging surface S15.

[0114] Table 10 shows the basic parameter table of the optical imaging lens of the fourth embodiment, wherein the units of the radius of curvature, the thickness / distance are millimeters (mm).

[0115]

[0116] Table 10

[0117] In the fourth embodiment, the object-side surface and image-side surface of any one of the first lens E1, the third lens E3 to the fifth lens E5 are aspherical. Table 11 gives the higher-order coefficients A4, A6, A8, and A6 of each aspherical mirror S1-S2, S7-S12 that can be used in the fourth embodiment. 10 A 12 A 14 A 16 A 18 A 20 A 22 A 24 A 26 A 28 and A 30 .

[0118] Face number A4 A6 A8 A10 A12 A14 A16 S1 1.9631E-04 5.2467E-04 -4.1657E-04 -1.4748E-04 -9.2335E-05 -2.0823E-05 2.1027E-06 S2 -2.6442E-02 2.0274E-03 -1.4659E-03 -9.5839E-05 -6.9333E-05 -7.8218E-06 2.0641E-06 S7 -2.5584E-01 4.4456E-03 -1.4257E-03 4.5851E-05 6.0798E-05 3.1661E-05 6.2768E-06 S8 -3.2182E-01 2.8259E-03 -3.7836E-03 -3.0861E-04 5.2463E-05 1.5775E-05 2.9762E-05 S9 3.7041E-02 7.5331E-03 -3.6752E-03 -1.1039E-03 4.3962E-05 8.8881E-05 1.8576E-05 S10 2.3018E-01 6.0426E-02 5.0028E-03 -8.6069E-04 -9.1412E-04 -2.7461E-05 1.0667E-04 S11 -2.2672E+00 7.1398E-01 -2.1713E-01 5.8623E-02 -1.6432E-02 5.4430E-03 -2.2939E-03 S12 -4.1778E+00 9.2720E-01 -2.5998E-01 1.0676E-01 -4.5340E-02 1.8186E-02 -9.4588E-03 Face number A18 A20 A22 A24 A26 A28 A30 S1 2.9096E-05 3.1911E-05 3.4637E-05 2.5234E-05 1.8492E-05 8.9473E-06 5.0103E-06 S2 -4.8009E-06 -4.7154E-06 -9.6897E-06 -7.6591E-06 -6.6917E-06 -2.0181E-06 -1.4964E-06 S7 3.1704E-05 2.0476E-05 2.6020E-05 1.6458E-05 1.5575E-05 7.2030E-06 4.3381E-06 S8 1.7631E-05 -2.5539E-06 -8.9228E-06 -1.2562E-05 -9.4825E-06 -6.3012E-06 -3.5585E-06 S9 5.8006E-05 3.7578E-05 3.6218E-05 1.7057E-05 1.5212E-05 3.8988E-06 4.6677E-06 S10 2.6174E-05 1.3424E-05 -1.4336E-05 3.1396E-06 -8.2950E-06 8.3734E-06 -2.2430E-06 S11 5.9904E-04 6.5287E-05 -1.9790E-04 1.1330E-04 -8.6289E-05 3.3408E-05 1.4062E-05 S12 3.1288E-03 -1.9640E-03 6.6726E-04 -2.2126E-04 2.3390E-04 3.5032E-05 6.2585E-05

[0119] Table 11

[0120] The difference between the optical imaging lenses 410 and 420 in Embodiments 1 and 2 of the fourth embodiment lies in the different structural dimensions of the included lens barrel and spacer element. Table 12 lists some basic parameters of the lens barrel and spacer element of the optical imaging lenses 410 and 420 of the fourth embodiment, such as CP3, D3s, d3s, d3m, D3m, EP34, D4s, d4s, D4m, d4m, L, D0s, d0s, D0m, and d0m, etc. Some of the basic parameters listed in Table 12 are based on... Figure 1 The measurements were obtained using the annotation method shown, and the units of the basic parameters listed in Table 12 are all millimeters (mm).

[0121]

[0122] Table 12

[0123] Figure 14A The on-axis chromatic aberration curves of the optical imaging lenses 410 and 420 of the fourth embodiment are shown, which indicate the deflection of the focal point of light of different wavelengths after passing through the optical imaging lenses 410 and 420. Figure 14B The astigmatism curves of the optical imaging lenses 410 and 420 of the fourth embodiment are shown, which represent the meridional image plane curvature and sagittal image plane curvature corresponding to different image heights. Figure 14C The distortion curves of the optical imaging lenses 410 and 420 of the fourth embodiment are shown, which represent the distortion magnitude values ​​corresponding to different image heights. Figure 14DThe magnification chromatic aberration curves of the optical imaging lenses 410 and 420 of the fourth embodiment are shown, which represent the deviation of different image heights of light rays after passing through the lenses on the imaging plane. According to the magnification chromatic aberration curves, the fourth embodiment can achieve good imaging quality. Figures 14A to 14D It can be known that the optical imaging lenses 410 and 420 of the fourth embodiment can achieve good imaging quality.

[0124] Table 13 shows the focal length values of the optical imaging lenses and each lens of the first to fourth embodiments, wherein the unit of the focal length is millimeter (mm). The focal length of the second lens in the state corresponding to the corresponding figure is shown as Figure 13 .

[0125] Focal length / embodiment 1 2 3 4 f 1.91 2.69 2.62 1.97 f1 2.47 1.81 2.20 2.50 f2 435.97 435.97 435.97 435.97 f3 -6.48 -2.42 -2.63 -6.35 f4 2.84 3.24 3.76 2.83 f5 -3.05 -5.48 -14.21 -3.00

[0126] Table 13

[0127] Table 14 shows the conditional values of each embodiment in the first to fourth embodiments.

[0128] Conditional / embodiment 1-1 1-2 2-1 2-2 3-1 3-2 4-1 4-2 T34 / CP3+d3s / R6 33.46 28.01 14.39 13.79 27.34 12.34 33.09 16.59 f3 / (D3s-d3s) -2.13 -5.15 -0.93 -1.53 -1.36 -0.89 -1.79 -4.14 f4 / CT4+d3m / R8 1.63 1.46 0.16 0.23 2.61 2.59 2.06 2.02 |R5+R7| / (D3s+D3m) 8.46 12.11 5.59 7.31 2.37 1.79 7.31 11.88 CT4 / EP34+f4 / |D4s-D3m| 13.59 2.63 8.11 3.78 2.61 5.28 24.29 3.02 (R6-R8) / (d4s-d3m) 2.42 2.42 3.41 2.23 1.80 1.75 1.80 1.73 (D4s-d4s) / R9 1.82 1.93 2.35 2.35 2.35 2.06 1.66 1.32 f5 / D4m+d4m / R10 6.65 7.09 6.35 6.80 3.77 3.40 6.30 6.35 L x Tan(Semi-FOV) / ∑CT 1.14 1.17 0.65 0.68 0.84 0.83 1.60 1.62 f1 / (D0s-d0s) 1.39 1.45 1.26 0.99 1.21 1.17 1.40 1.74 f5 / (D0m-d0m) -5.73 -5.73 -10.31 -10.31 -27.38 -20.39 -2.94 -2.57 f2 / f+L / CT2 239.44 239.73 173.27 173.82 178.79 178.63 236.30 236.50 Semi-FOV 32.5 32.5 26.8 26.8 27.4 27.4 32.8 32.8

[0129] Table 14

[0130] The above description is merely preferred embodiments of the present application and a description of the principles of the technology used. It should be understood by those skilled in the art that the scope of the application involved in the present application is not limited to the technical solutions formed by the specific combinations 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 and the technical features disclosed in the present application (but not limited to) having similar functions.

Claims

1. An optical imaging lens, characterized in that, include: A five-element lens group includes a first lens with positive 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, arranged sequentially along the optical axis from the object side to the image side. The second lens is configured as a variable focal length lens. The image-side surface of the third lens is concave. The object-side surface of the fourth lens is concave, and the image-side surface is convex. The object-side surface of the fifth lens is convex, and the image-side surface is concave. A group of spacers, including a third spacer element that contacts the image-side surface of the third lens; and The lens barrel, the five-element lens group, and the spacer element group are placed inside the lens barrel. The optical imaging lens contains five lenses with optical power. The air gap T34 between the third lens and the fourth lens on the optical axis, the radius of curvature R6 of the image side of the third lens, the maximum thickness CP3 of the third spacer element, and the inner diameter d3s of the object side of the third spacer element satisfy: 12.34≤T34 / CP3+d3s / R6≤33.46; The effective focal length f2 of the second lens, the center thickness CT2 of the second lens on the optical axis, the total effective focal length f of the optical imaging lens, and the length L of the lens barrel in the direction of the optical axis satisfy: 173.27≤f2 / f+L / CT2≤239.73; The effective focal length f4 of the fourth lens, the center thickness CT4 of the fourth lens on the optical axis, the radius of curvature R8 of the image side surface of the fourth lens, and the inner diameter d3m of the image side surface of the third spacer element satisfy the following condition: 0.16≤f4 / CT4+d3m / R8≤2.

61.

2. The optical imaging lens according to claim 1, characterized in that, The effective focal length f3 of the third lens, the inner diameter d3s of the object side of the third spacer element, and the outer diameter D3s of the object side of the third spacer element satisfy: -5.15≤f3 / (D3s-d3s)≤-0.

89.

3. The optical imaging lens according to claim 1, characterized in that, The radius of curvature R5 of the object side of the third lens, the radius of curvature R7 of the object side of the fourth lens, the outer diameter D3s of the object side of the third spacer element, and the outer diameter D3m of the image side of the third spacer element satisfy: 1.79≤|R5+R7| / (D3s+D3m)≤12.

11.

4. The optical imaging lens according to claim 1, characterized in that, The spacer element group further includes a fourth spacer element that contacts the image-side surface of the fourth lens. Wherein, the center thickness CT4 of the fourth lens on the optical axis, the spacing EP34 between the third and fourth spacers along the optical axis, the effective focal length f4 of the fourth lens, the outer diameter D3m of the image side of the third spacer and the outer diameter D4s of the object side of the fourth spacer satisfy: 2.61≤CT4 / EP34+f4 / |D4s-D3m|≤24.

29.

5. The optical imaging lens according to claim 1, characterized in that, The spacer element group further includes a fourth spacer element that contacts the image-side surface of the fourth lens. Wherein, the radius of curvature R6 of the image side of the third lens, the radius of curvature R8 of the image side of the fourth lens, the inner diameter d3m of the image side of the third spacer element, and the inner diameter d4s of the object side of the fourth spacer element satisfy: 1.73≤(R6-R8) / (d4s-d3m)≤3.

41.

6. The optical imaging lens according to claim 1, characterized in that, The spacer element group further includes a fourth spacer element that contacts the image-side surface of the fourth lens. The inner diameter d4s of the object side surface of the fourth spacer element, the outer diameter D4s of the object side surface of the fourth spacer element, and the radius of curvature R9 of the object side surface of the fifth lens satisfy: 1.32≤(D4s-d4s) / R9≤2.

35.

7. The optical imaging lens according to claim 1, characterized in that, The spacer element group further includes a fourth spacer element that contacts the image-side surface of the fourth lens. Wherein, the effective focal length f5 of the fifth lens, the radius of curvature R10 of the image-side surface of the fifth lens, the inner diameter d4m of the image-side surface of the fourth spacer element, and the outer diameter D4m of the image-side surface of the fourth spacer element satisfy: 3.40≤f5 / D4m+d4m / R10<7.

1.

8. The optical imaging lens according to any one of claims 1 to 7, characterized in that, The length L of the lens barrel along the optical axis, half of the maximum field of view (Semi-FOV) of the optical imaging lens, and the sum of the center thicknesses of all lenses from the first lens to the fifth lens along the optical axis, ∑CT, satisfy: 0.65≤L×Tan(Semi-FOV) / ∑CT≤1.

62.

9. The optical imaging lens according to any one of claims 1 to 7, characterized in that, The effective focal length f1 of the first lens, the inner diameter d0s of the object-side end face of the lens barrel, and the outer diameter D0s of the object-side end face of the lens barrel satisfy the following condition: 0.99≤f1 / (D0s-d0s)≤1.

74.

10. The optical imaging lens according to any one of claims 1 to 7, characterized in that, The effective focal length f5 of the fifth lens, the inner diameter d0m of the image-side end face of the lens barrel, and the outer diameter D0m of the image-side end face of the lens barrel satisfy the following condition: -27.38≤f5 / (D0m-d0m)≤-2.57.

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