Optical imaging lens

Abstract

The present application discloses an optical imaging lens. The optical imaging lens sequentially includes, from the object side to the image side along the optical axis: a diaphragm; a first lens with positive optical power, whose object side surface is convex; a second lens with negative optical power; a third lens with optical power, whose image side surface is concave; a fourth lens with optical power; and a fifth lens with optical power, whose object side surface is convex; wherein, the effective focal length f1 of the first lens, the effective focal length f2 of the second lens, and the total effective focal length f of the optical imaging lens satisfy: -0.2 < (f1 + f2) / f < 0; the radius of curvature R4 of the image side surface of the second lens and the radius of curvature R5 of the object side surface of the third lens satisfy: 4 < (R4 + R5) / (R4 - R5) < 10.

Description

Technical Field

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

[0002] At present, consumers have higher and higher requirements for the photographing quality of portable electronic devices. Optical imaging lenses with various characteristics such as large image plane, ultra-wide angle, telephoto, and macro are more and more applied to portable electronic devices.

[0003] Compared with other imaging lenses, the telephoto lens has a much longer focal length, a much smaller viewing angle, and a much larger image shown on the negative film. It is usually used to shoot some images at a relatively long distance and is also better at shooting some details of the image. However, the function of the telephoto lens is single. When it is necessary to shoot images at a short distance, an additional lens needs to be equipped. The increase in the number of lenses on a portable electronic device will lead to an increase in cost and occupy more space, which violates the principle of pursuing portability and beauty of portable electronic devices.

[0004] How to expand the performance of the telephoto lens so that, on the basis of the telephoto performance, it also has good imaging quality and can shoot portraits and other performances, in order to achieve the purpose of reducing the number of optical imaging lenses on portable electronic devices, has become an urgent problem to be solved. Summary of the Invention

[0005] The present application provides an optical imaging lens applicable to portable electronic products, which can at least solve or partially solve at least one of the above disadvantages in the prior art.

[0006] One aspect of the present application provides an optical imaging lens, which sequentially includes, from the object side to the image side along the optical axis: a diaphragm; a first lens with a positive optical power, the object side surface of which is convex; a second lens with a negative optical power; a third lens with an optical power, the image side surface of which is concave; a fourth lens with an optical power; and a fifth lens with an optical power, the object side surface of which is convex; wherein, the effective focal length f1 of the first lens, the effective focal length f2 of the second lens, and the total effective focal length f of the optical imaging lens satisfy: -0.2 < (f1 + f2) / f < 0; the radius of curvature R4 of the image side surface of the second lens and the radius of curvature R5 of the object side surface of the third lens satisfy: 4.0 < (R4 + R5) / (R4 - R5) < 10.0.

[0007] In one embodiment, the distance TTL on the optical axis from the object side surface of the first lens to the imaging surface of the optical imaging lens and the total effective focal length f of the optical imaging lens satisfy: TTL / f < 1.1.

[0008] In one embodiment, the aperture is an adjustable aperture; the minimum distance STLmin from the adjustable aperture to the intersection point of the object side of the first lens and the optical axis, the maximum distance STLmax from the adjustable aperture to the intersection point of the object side of the first lens and the optical axis, and the distance TTL from the object side of the first lens to the imaging surface of the optical imaging lens on the optical axis satisfy: 0 < (STLmax - STLmin) / TTL < 0.5.

[0009] In one embodiment, it further includes: a first adjustment module, which is arranged on the adjustable aperture and is used to adjust the light passing aperture of the adjustable aperture; and a second adjustment module, which is used to adjust the position of the adjustable aperture along the optical axis.

[0010] In one embodiment, the entrance pupil diameter EPD of the optical imaging lens satisfies: 3.5mm < EPD < 5.5mm.

[0011] In one embodiment, the central thickness CT4 of the fourth lens on the optical axis and the air gap T45 between the fourth lens and the fifth lens on the optical axis satisfy: 1.0 < CT4 / T45 < 1.6.

[0012] In one embodiment, the central thickness CT4 of the fourth lens on the optical axis and the air gap T34 between the third lens and the fourth lens on the optical axis satisfy: 1.0 < T34 / CT4 < 2.0.

[0013] In one embodiment, the axial distance SAG22 from the intersection point of the image side of the second lens and the optical axis to the vertex of the effective radius of the image side of the second lens and the axial distance SAG31 from the intersection point of the object side of the third lens and the optical axis to the vertex of the effective radius of the object side of the third lens satisfy: 0.8 < SAG22 / SAG31 < 1.3.

[0014] In one embodiment, the central thickness CT2 of the second lens on the optical axis and the central thickness CT3 of the third lens on the optical axis satisfy: 0.5 < CT2 / CT3 < 0.9.

[0015] In one embodiment, the distance BFL from the image side of the fifth lens to the imaging surface of the optical imaging lens on the optical axis and the distance TD from the object side of the first lens to the image side of the fifth lens on the optical axis satisfy: BFL / TD < 0.2.

[0016] In one embodiment, the maximum effective radius DT11 of the object side of the first lens and half of the diagonal length ImgH of the effective pixel region on the imaging surface satisfy: 0.8 < DT11 / ImgH < 1.1.

[0017] In one embodiment, the maximum value DTmax of the maximum effective radii of the respective mirror surfaces from the object side surface of the first lens to the image side surface of the fifth lens and the minimum value DTmin of the maximum effective radii of the respective mirror surfaces from the object side surface of the first lens to the image side surface of the fifth lens may satisfy: 1.3 < DTmax / DTmin < 1.6.

[0018] In one embodiment, the edge thickness ET3 of the third lens and the edge thickness ET4 of the fourth lens may satisfy: 0.8 < ET3 / ET4 < 1.2.

[0019] In one embodiment, the edge thickness ET4 of the fourth lens and the central thickness CT4 of the fourth lens on the optical axis may satisfy: 0.7 < ET4 / CT4 < 1.0.

[0020] In one embodiment, the maximum effective radius DT31 of the object side surface of the third lens and the maximum effective radius DT42 of the image side surface of the fourth lens may satisfy: 0.8 < DT31 / DT42 < 1.0.

[0021] In one embodiment, the axial distance SAG41 from the intersection of the object side surface of the fourth lens and the optical axis to the vertex of the effective radius of the object side surface of the fourth lens and the central thickness CT4 of the fourth lens on the optical axis may satisfy: -0.5 < SAG41 / CT4 < 0.

[0022] In one embodiment, half of the diagonal length ImgH of the effective pixel region on the imaging surface and the total effective focal length f of the optical imaging lens may satisfy: 0.2 < ImgH / f < 0.5.

[0023] On the other hand, the present application provides an optical imaging lens, which sequentially includes, along the optical axis from the object side to the image side: an adjustable aperture stop; a first lens with a positive optical power; a second lens with a negative optical power; a third lens with an optical power; a fourth lens with an optical power; and a fifth lens with an optical power; wherein, TTL / f < 1.1; 0 < (STLmax - STLmin) / TTL < 0.5; and 3.5 mm < EPD < 5.5 mm; wherein, STLmin is the minimum distance from the adjustable aperture stop to the intersection of the object side surface of the first lens and the optical axis, STLmax is the maximum distance from the adjustable aperture stop to the intersection of the object side surface of the first lens and the optical axis, TTL is the distance from the object side surface of the first lens to the imaging surface of the optical imaging lens on the optical axis, f is the total effective focal length of the optical imaging lens, and EPD is the entrance pupil diameter of the optical imaging lens.

[0024] In one embodiment, it further includes: a first adjustment module, which is arranged on the adjustable aperture stop and is used to adjust the light passing aperture of the adjustable aperture stop; and a second adjustment module, which is used to adjust the position of the adjustable aperture stop along the optical axis.

[0025] In one embodiment, the central thickness CT4 of the fourth lens on the optical axis and the air gap T45 between the fourth lens and the fifth lens on the optical axis may satisfy: 1.0 < CT4 / T45 < 1.6.

[0026] Furthermore, the effective focal length f1 of the first lens, the effective focal length f2 of the second lens, and the total effective focal length f of the optical imaging lens may satisfy: -0.2 < (f1 + f2) / f < 0.

[0027] Furthermore, the radius of curvature R4 of the image side of the second lens and the radius of curvature R5 of the object side of the third lens may satisfy: 4.0 < (R4 + R5) / (R4 - R5) < 10.0.

[0028] In one embodiment, the central thickness CT4 of the fourth lens on the optical axis and the air gap T34 between the third lens and the fourth lens on the optical axis may satisfy: 1.0 < T34 / CT4 < 2.0.

[0029] In one embodiment, the axial distance SAG22 from the intersection of the image side of the second lens and the optical axis to the vertex of the effective radius of the image side of the second lens and the axial distance SAG31 from the intersection of the object side of the third lens and the optical axis to the vertex of the effective radius of the object side of the third lens may satisfy: 0.8 < SAG22 / SAG31 < 1.3.

[0030] In one embodiment, the central thickness CT2 of the second lens on the optical axis and the central thickness CT3 of the third lens on the optical axis may satisfy: 0.5 < CT2 / CT3 < 0.9.

[0031] In one embodiment, the distance BFL from the image side of the fifth lens to the imaging surface of the optical imaging lens on the optical axis and the distance TD from the object side of the first lens to the image side of the fifth lens on the optical axis may satisfy: BFL / TD < 0.2.

[0032] In one embodiment, the maximum effective radius DT11 of the object side of the first lens and half of the diagonal length ImgH of the effective pixel region on the imaging surface may satisfy: 0.8 < DT11 / ImgH < 1.1.

[0033] In one embodiment, the maximum value DTmax of the maximum effective radii of the respective lens surfaces from the object side of the first lens to the image side of the fifth lens and the minimum value DTmin of the maximum effective radii of the respective lens surfaces from the object side of the first lens to the image side of the fifth lens may satisfy: 1.3 < DTmax / DTmin < 1.6.

[0034] In one embodiment, the edge thickness ET3 of the third lens and the edge thickness ET4 of the fourth lens may satisfy: 0.8 < ET3 / ET4 < 1.2.

[0035] In one embodiment, the edge thickness ET4 of the fourth lens and the central thickness CT4 of the fourth lens on the optical axis may satisfy: 0.7 < ET4 / CT4 < 1.0.

[0036] In one embodiment, the maximum effective radius DT31 of the object side surface of the third lens and the maximum effective radius DT42 of the image side surface of the fourth lens may satisfy: 0.8 < DT31 / DT42 < 1.0.

[0037] In one embodiment, the axial distance SAG41 from the intersection of the object side surface of the fourth lens and the optical axis to the vertex of the effective radius of the object side surface of the fourth lens and the central thickness CT4 of the fourth lens on the optical axis may satisfy: -0.5 < SAG41 / CT4 < 0.

[0038] In one embodiment, half of the diagonal length ImgH of the effective pixel region on the imaging surface and the total effective focal length f of the optical imaging lens may satisfy: 0.2 < ImgH / f < 0.5.

[0039] In one embodiment, the object side surface of the first lens may be convex; the image side surface of the third lens may be concave; the object side surface of the fifth lens may be convex.

[0040] The optical imaging lens provided in this application uses an adjustable diaphragm and multiple lenses, such as the first lens to the fifth lens, and optimizes the setting of the optical power, surface type, curvature radius, central thickness, axial spacing of each lens, and the air gap between adjacent lenses, and reasonably controls the size and position of the diaphragm, so that while the optical imaging lens satisfies the telephoto function of a telephoto lens, it also takes into account the portrait function of a large aperture lens, realizing the integration of a portrait lens and a telephoto lens. BRIEF DESCRIPTION OF THE DRAWINGS

[0041] In conjunction with the drawings, through the following detailed description of non-limiting embodiments, other features, objectives, and advantages of this application will become more apparent. In the drawings:

[0042] Figure 1 Shows a schematic structural diagram of the optical imaging lens according to Embodiment 1 of this application, where the adjustable diaphragm is in the state farthest from the object side surface of the first lens;

[0043] Figure 2 Shows a schematic structural diagram of the optical imaging lens according to Embodiment 1 of this application, where the adjustable diaphragm is in the state closest to the object side surface of the first lens;

[0044] Figures 3A to 3Drespectively show the axial chromatic aberration curve, astigmatism curve, distortion curve, and longitudinal chromatic aberration curve of the optical imaging lens of Embodiment 1 in the Figure 1 state;

[0045] Figures 4A to 4D respectively show the axial chromatic aberration curve, astigmatism curve, distortion curve, and longitudinal chromatic aberration curve of the optical imaging lens of Embodiment 1 in the Figure 2 state;

[0046] Figure 5 shows a schematic structural diagram of the optical imaging lens according to Embodiment 2 of the present application, wherein the adjustable diaphragm is in a state farthest from the object side of the first lens;

[0047] Figure 6 shows a schematic structural diagram of the optical imaging lens according to Embodiment 2 of the present application, wherein the adjustable diaphragm is in a state closest to the object side of the first lens;

[0048] Figures 7A to 7D respectively show the axial chromatic aberration curve, astigmatism curve, distortion curve, and longitudinal chromatic aberration curve of the optical imaging lens of Embodiment 2 in the Figure 5 state;

[0049] Figures 8A to 8D respectively show the axial chromatic aberration curve, astigmatism curve, distortion curve, and longitudinal chromatic aberration curve of the optical imaging lens of Embodiment 2 in the Figure 6 state;

[0050] Figure 9 shows a schematic structural diagram of the optical imaging lens according to Embodiment 3 of the present application, wherein the adjustable diaphragm is in a state farthest from the object side of the first lens;

[0051] Figure 10 shows a schematic structural diagram of the optical imaging lens according to Embodiment 3 of the present application, wherein the adjustable diaphragm is in a state closest to the object side of the first lens;

[0052] Figures 11A to 11D respectively show the axial chromatic aberration curve, astigmatism curve, distortion curve, and longitudinal chromatic aberration curve of the optical imaging lens of Embodiment 3 in the Figure 9 state;

[0053] Figures 12A to 12D respectively show the axial chromatic aberration curve, astigmatism curve, distortion curve, and longitudinal chromatic aberration curve of the optical imaging lens of Embodiment 3 in the Figure 10 state;

[0054] Figure 13Shows a schematic structural diagram of an optical imaging lens according to Embodiment 4 of the present application, where the adjustable diaphragm is in the state farthest from the object side of the first lens;

[0055] Figure 14 Shows a schematic structural diagram of an optical imaging lens according to Embodiment 4 of the present application, where the adjustable diaphragm is in the state closest to the object side of the first lens;

[0056] Figures 15A to 15D Respectively show the axial chromatic aberration curve, astigmatism curve, distortion curve, and longitudinal chromatic aberration curve of the optical imaging lens of Embodiment 4 in the Figure 13 state;

[0057] Figures 16A to 16D Respectively show the axial chromatic aberration curve, astigmatism curve, distortion curve, and longitudinal chromatic aberration curve of the optical imaging lens of Embodiment 4 in the Figure 14 state;

[0058] Figure 17 Shows a schematic structural diagram of an optical imaging lens according to Embodiment 5 of the present application, where the adjustable diaphragm is in the state farthest from the object side of the first lens;

[0059] Figure 18 Shows a schematic structural diagram of an optical imaging lens according to Embodiment 5 of the present application, where the adjustable diaphragm is in the state closest to the object side of the first lens;

[0060] Figures 19A to 19D Respectively show the axial chromatic aberration curve, astigmatism curve, distortion curve, and longitudinal chromatic aberration curve of the optical imaging lens of Embodiment 5 in the Figure 17 state;

[0061] Figures 20A to 20D Respectively show the axial chromatic aberration curve, astigmatism curve, distortion curve, and longitudinal chromatic aberration curve of the optical imaging lens of Embodiment 5 in the Figure 18 state;

[0062] Figure 21 Shows a cross-sectional view of an optical imaging lens according to an embodiment of the present application;

[0063] Figure 22 Shows a front view of the first adjustment module of an optical imaging lens according to an embodiment of the present application. Detailed implementation manners

[0064] To better understand the present application, various aspects of the present application will be described in more detail with reference to the accompanying drawings. It should be understood that these detailed descriptions are only descriptions of exemplary embodiments of the present application and do not limit the scope of the present application in any way. Throughout the specification, the same reference numerals refer to the same elements. The expression "and / or" includes any and all combinations of one or more of the associated listed items.

[0065] It should be noted that in this specification, the expressions such as first, second, third, etc. are only used to distinguish one feature from another feature and do not represent any limitation on the features. Therefore, without departing from the teachings of the present application, the first lens discussed below may also be referred to as the second lens or the third lens.

[0066] In the drawings, for ease of illustration, the thickness, dimensions, and shape of the lens have been slightly exaggerated. Specifically, the spherical or aspherical shapes shown in the drawings are shown by way of example. That is, the spherical or aspherical shapes are not limited to the spherical or aspherical shapes shown in the drawings. The drawings are for illustrative purposes only and are not drawn to an exact scale.

[0067] In this document, the paraxial region refers to the region near the optical axis. If the lens surface is convex and the position of the convex surface is not defined, it means that the lens surface is convex at least in the paraxial region; if the lens surface is concave and the position of the concave surface is not defined, it means that the lens surface is concave at least in the paraxial region. The surface of each lens closest to the object being photographed is called the object side surface of the lens, and the surface of each lens closest to the imaging surface is called the image side surface of the lens.

[0068] It should also be understood that the terms "comprise", "comprising", "have", "include", and / or "including", when used in this specification, indicate the presence of the stated features, elements, and / or components, but do not exclude the presence or addition of one or more other features, elements, components, and / or combinations thereof. In addition, when an expression such as "at least one of..." appears after a list of listed features, it modifies the entire list of listed features rather than an individual element in the list. In addition, when describing embodiments of the present application, the use of "may" means "one or more embodiments of the present application". And the term "exemplary" is intended to refer to an example or illustration.

[0069] Unless otherwise defined, all terms used herein (including technical and scientific terms) 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 terms (such as those defined in a common dictionary) should be interpreted as having a meaning consistent with their meaning in the context of the relevant art and will not be interpreted in an idealized or overly formal sense unless expressly so defined herein.

[0070] It should be noted that, without conflict, the embodiments in the present application and the features in the embodiments may be combined with each other. The present application will be described in detail below with reference to the drawings and in combination with the embodiments.

[0071] The features, principles and other aspects of the present application will be described in detail below.

[0072] The optical imaging lens according to an exemplary embodiment of the present application may include five lenses with optical powers, namely, a first lens, a second lens, a third lens, a fourth lens, and a fifth lens. These five lenses are arranged in sequence from the object side to the image side along the optical axis. An air gap may be provided between any two adjacent lenses among the first lens to the fifth lens.

[0073] In an exemplary embodiment, the above optical imaging lens may further include a diaphragm. The diaphragm may be disposed at an appropriate position as needed. For example, the diaphragm may be disposed in front of the first lens. Optionally, the above optical imaging lens may further include a filter for correcting color deviation and / or a protective glass for protecting the photosensitive element located on the imaging surface.

[0074] In an exemplary embodiment, the first lens may have a positive optical power; the second lens may have a negative optical power; the third lens may have a positive or negative optical power; the fourth lens may have a positive or negative optical power; the fifth lens may have a positive or negative optical power. By reasonably matching the optical powers and surface shapes of the lenses in the optical lens, the low-order aberrations of the optical lens can be effectively balanced, and the tolerance sensitivity can be reduced.

[0075] In an exemplary embodiment, the object side surface of the first lens may be convex, and the image side surface may be convex.

[0076] In an exemplary embodiment, the image side surface of the second lens may be concave.

[0077] In an exemplary embodiment, the object side surface of the third lens may be convex, and the image side surface may be concave.

[0078] In an exemplary embodiment, the object side surface of the fifth lens may be convex, and the image side surface may be concave.

[0079] In an exemplary embodiment, the total effective focal length f of the optical imaging lens, the effective focal length f1 of the first lens, and the effective focal length f2 of the second lens may satisfy: -0.2 < (f1 + f2) / f < 0. Satisfying this formula can distribute the focal lengths of the first lens and the second lens, and thus well realize the focusing functions of these two lenses. More specifically, f, f1, and f may satisfy: -0.15 < (f1 + f2) / f < 0.

[0080] In an exemplary embodiment, the radius of curvature R4 of the image side surface of the second lens and the radius of curvature R5 of the object side surface of the third lens may satisfy: 4.0 < (R4 + R5) / (R4 - R5) < 10.0. By controlling the mutual relationship between the radius of curvature of the image side surface of the second lens and the radius of curvature of the object side surface of the third lens, chromatic aberration of the optical imaging lens can be corrected very effectively, and the balance of various aberrations can be achieved. Moreover, by cooperating with the first lens, the optical power of the optical imaging lens can be reasonably distributed. More specifically, R4 and R5 may satisfy 4.05 < (R4 + R5) / (R4 - R5) < 9.40.

[0081] In an exemplary embodiment, the distance TTL from the object side surface of the first lens to the imaging surface on the optical axis and the total effective focal length f of the optical imaging lens may satisfy: TTL / f < 1.1. By reasonably controlling the ratio of the distance from the object side surface of the first lens to the imaging surface on the optical axis to the total effective focal length of the optical imaging lens, while enabling the optical imaging lens to obtain a larger focal length, the total size of the optical imaging lens can be effectively reduced, and the ultra-thin characteristics and miniaturization of the telephoto optical imaging lens can be achieved. More specifically, TTL and f may satisfy 1.00 < TTL / f < 1.09.

[0082] In an exemplary embodiment, the diaphragm is an adjustable diaphragm. The minimum distance STLmin from the adjustable diaphragm to the intersection point of the object side surface of the first lens and the optical axis, the maximum distance STLmax from the adjustable diaphragm to the intersection point of the object side surface of the first lens and the optical axis, and the distance TTL from the object side surface of the first lens to the imaging surface on the optical axis may satisfy: 0 < (STLmax - STLmin) / TTL < 0.5. By reasonably controlling the distance from the adjustable diaphragm to the object side surface of the first lens, the overall imaging quality of the optical imaging lens can be ensured when the adjustable diaphragm is in different states.

[0083] In an exemplary embodiment, the central thickness CT4 of the fourth lens on the optical axis and the air gap T45 between the fourth lens and the fifth lens on the optical axis may satisfy: 1.0 < CT4 / T45 < 1.6. By controlling the mutual relationship between the central thickness of the fourth lens on the optical axis and the air gap between the fourth lens and the fifth lens on the optical axis, on the one hand, it helps to distribute the optical power of the lens disposed on the object side of the fourth lens, and on the other hand, it can effectively reduce the axial chromatic aberration and chromatic spherical aberration of the lens.

[0084] In an exemplary embodiment, the central thickness CT4 of the fourth lens on the optical axis and the air gap T34 between the third lens and the fourth lens on the optical axis may satisfy: 1.0 < T34 / CT4 < 2.0. By controlling the relationship between the air gap between the third lens and the fourth lens on the optical axis and the central thickness of the fourth lens on the optical axis, on the one hand, it helps with the optical power distribution of the lens disposed on the object side of the fourth lens, and on the other hand, it can effectively reduce the axial chromatic aberration and spherical chromatic aberration of the lens. More specifically, T34 and CT4 may satisfy 1.2 < T34 / CT4 < 1.7.

[0085] In an exemplary embodiment, the axial distance SAG22 from the intersection of the image side surface of the second lens and the optical axis to the vertex of the effective radius of the image side surface of the second lens and the axial distance SAG31 from the intersection of the object side surface of the third lens and the optical axis to the vertex of the effective radius of the object side surface of the third lens may satisfy: 0.8 < SAG22 / SAG31 < 1.3. By controlling the ratio of the axial distance from the intersection of the image side surface of the second lens and the optical axis to the vertex of the effective radius of the image side surface of the second lens to the axial distance from the intersection of the object side surface of the third lens and the optical axis to the vertex of the effective radius of the object side surface of the third lens within this numerical range, the following beneficial effects can be achieved: It helps to increase the effective focal length of the lens while maintaining the imaging quality of the optical imaging lens, making its telephoto characteristics more prominent; it helps to improve the spherical aberration of the middle field of view and the coma of the edge field of view, enabling the lens to have better aberration correction ability; and it helps to increase the relative illumination of the lens and improve the imaging quality of the optical imaging lens in a darker environment.

[0086] In an exemplary embodiment, the central thickness CT2 of the second lens on the optical axis and the central thickness CT3 of the third lens on the optical axis may satisfy: 0.5 < CT2 / CT3 < 0.9. By controlling the ratio of the central thicknesses of the second lens and the third lens on the optical axis within this numerical range, the longitudinal spherical aberration of the lens can be improved, the ghost image at the center of the image plane can be improved, and the stability of the lens structure can be enhanced. More specifically, CT2 and CT3 may satisfy: 0.65 < CT2 / CT3 < 0.88.

[0087] In an exemplary embodiment, the distance BFL from the image side surface of the fifth lens to the imaging plane on the optical axis and the distance TD from the object side surface of the first lens to the image side surface of the fifth lens on the optical axis may satisfy: BFL / TD < 0.2. By controlling the ratio of the distance from the image side surface of the fifth lens to the imaging plane on the optical axis to the distance from the object side surface of the first lens to the image side surface of the fifth lens on the optical axis within this numerical range, the adjustable focus range of the lens can be ensured, and at the same time, the aberration of the lens can be effectively reduced to improve the overall imaging quality. Exemplarily, 0.15 < BFL / TD < 0.19.

[0088] In an exemplary embodiment, the maximum effective radius DT11 of the object side surface of the first lens and half of the diagonal length ImgH of the effective pixel region on the imaging surface may satisfy: 0.8 < DT11 / ImgH < 1.1. By controlling the ratio of the maximum effective radius of the object side surface of the first lens to half of the diagonal length of the effective pixel region on the imaging surface within this numerical range, it helps to increase the height of the imaging surface, helps to increase the effective focal length of the optical imaging lens, and also helps to improve the processability of the first lens so that the optical imaging lens has higher practicality. More specifically, DT11 and ImgH may satisfy 0.9 < DT11 / ImgH < 1.0.

[0089] In an exemplary embodiment, the maximum value DTmax of the maximum effective radii of the respective lens surfaces from the object side surface of the first lens to the image side surface of the fifth lens and the minimum value DTmin of the maximum effective radii of the respective lenses from the object side surface of the first lens to the image side surface of the fifth lens may satisfy: 1.3 < DTmax / DTmin < 1.6. By controlling the ratio of the maximum value to the minimum value of the maximum effective radii of the respective lens surfaces from the object side surface of the first lens to the image side surface of the fifth lens within this numerical range, the dimensional step between different lenses of the lens is effectively ensured, which is more conducive to assembly, and helps to improve the processability of the first lens to the fifth lens, so that the optical imaging lens has higher practicality. More specifically, DTmax and DTmin may satisfy: 1.4 < DTmax / DTmin < 1.5.

[0090] In an exemplary embodiment, the edge thickness ET3 of the third lens and the edge thickness ET4 of the fourth lens may satisfy: 0.8 < ET3 / ET4 < 1.2. By controlling the mutual relationship between the edge thicknesses of the third lens and the fourth lens, while reducing the size of the optical imaging lens and maintaining its good processability, the amount of distortion influence of the optical imaging lens can be balanced. More specifically, ET3 and ET4 may satisfy: 0.90 < ET3 / ET4 < 1.11.

[0091] In an exemplary embodiment, the edge thickness ET4 of the fourth lens and the central thickness CT4 of the fourth lens on the optical axis may satisfy: 0.7 < ET4 / CT4 < 1.0. By controlling this conditional expression, the structural dimensions of the fourth lens can be adjusted. Furthermore, while reducing the lens size and maintaining the good processability of the fourth lens, the amount of distortion influence of the lens can be balanced. More specifically, CT3 and CT4 may satisfy: 0.73 < ET4 / CT4 < 0.90.

[0092] In an exemplary embodiment, the maximum effective radius DT31 of the object side surface of the third lens and the maximum effective radius DT42 of the image side surface of the fourth lens may satisfy: 0.8 < DT31 / DT42 < 1.0. By controlling the ratio of the maximum effective radius of the object side surface of the third lens to the maximum effective radius of the image side surface of the fourth lens within this numerical range, the step difference between the third lens and the fourth lens is effectively ensured, which is more conducive to the assembly of the optical imaging lens and helps to improve the processability of the third lens and the fourth lens, thereby making the optical imaging lens have higher practicability.

[0093] In an exemplary embodiment, the axial distance SAG41 from the intersection of the object side surface of the fourth lens and the optical axis to the vertex of the effective radius of the object side surface of the fourth lens and the central thickness CT4 of the fourth lens on the optical axis may satisfy: -0.5 < SAG41 / CT4 < 0. By controlling the ratio of the axial distance from the intersection of the object side surface of the fourth lens and the optical axis to the vertex of the effective radius of the object side surface of the fourth lens to the central thickness of the fourth lens on the optical axis within this numerical range, the following beneficial effects can be achieved: by controlling SAG41 / CT4 < 0, the light rays can have a certain divergence function when passing through the object side surface of the fourth lens, which can effectively balance the aberration of the lens; by controlling SAG41 / CT4 > -0.5, the process problems such as difficult processing caused by too large SAG41 can be avoided. More specifically, SAG41 and CT4 may satisfy: -0.35 < SAG41 / CT4 < -0.15.

[0094] In an exemplary embodiment, half of the diagonal length ImgH of the effective pixel region on the imaging surface and the total effective focal length f of the optical imaging lens may satisfy: 0.2 < ImgH / f < 0.5. By controlling the mutual relationship between half of the diagonal length of the effective pixel region on the imaging surface and the total effective focal length of the optical imaging lens, the optical imaging lens can obtain a larger focal length within a certain imaging range, which is conducive to the miniaturization of the telephoto optical imaging lens.

[0095] In an exemplary embodiment, the entrance pupil diameter EPD of the optical imaging lens may satisfy: 3.5 mm < EPD < 5.5 mm. Controlling the range of the entrance pupil diameter of the optical imaging lens can ensure the overall imaging quality of the lens under different aperture parameters.

[0096] In an exemplary embodiment, a diaphragm adjusting device is provided on the object side of an optical imaging lens. The diaphragm adjusting device includes a first adjusting module and a second adjusting module. The first adjusting module is disposed on the adjustable diaphragm and is used to adjust the size of the light passing aperture of the adjustable diaphragm, and further used to adjust the F-number Fno of the optical imaging lens. The second adjusting module slides back and forth along the optical axis and drives the adjustable diaphragm and the first adjusting module to slide along the optical axis, and is used to adjust the position of the adjustable diaphragm. Exemplarily, the adjustable diaphragm is slidably disposed with the second adjusting module and the sliding direction is along the optical axis. By controlling the position and size of the adjustable diaphragm, the F-number Fno is switched within the range of 1.8 to 2.4, so that the telephoto function, portrait shooting, and background blurring function of the lens can be well balanced. Exemplarily, at least a part of the first adjusting module is used to form the light passing hole of the adjustable diaphragm.

[0097] This application proposes an optical imaging lens with characteristics such as long focal length, miniaturization, and ultra-thinness. The optical imaging lens according to the above-described embodiment of this application can adopt multiple lenses, such as the five lenses described above. By reasonably distributing the optical power, surface type, central thickness of each lens, and the on-axis spacing between each lens, etc., the incident light can be effectively converged, the optical total length of the imaging lens can be reduced, and the processability of the imaging lens can be improved, making the optical imaging lens more conducive to production and processing.

[0098] In an exemplary embodiment, at least one of the lens surfaces of each lens is an aspherical surface, that is, at least one of the object side surface of the first lens to the image side surface of the fifth lens is an aspherical surface. The characteristics of an aspherical lens are that the curvature changes continuously from the center of the lens to the periphery of the lens. Different from a spherical lens with a constant curvature from the center of the lens to the periphery of the lens, an aspherical lens has better curvature radius characteristics and has the advantages of improving distortion aberration and astigmatism aberration. After using an aspherical lens, it is possible to eliminate the aberration that appears during imaging as much as possible, thereby improving the imaging quality. Optionally, at least one of the object side surface and the image side surface of each of the first lens, the second lens, the third lens, the fourth lens, and the fifth lens is an aspherical surface. Optionally, both the object side surface and the image side surface of each of the first lens, the second lens, the third lens, the fourth lens, and the fifth lens are aspherical surfaces.

[0099] This application also provides an imaging device, and its electronic photosensitive element can be a charge-coupled device (CCD) or a complementary metal-oxide-semiconductor element (CMOS). The imaging device can be an independent imaging device such as a digital camera, or an imaging module integrated on a mobile electronic device such as a mobile phone. The imaging device is equipped with the optical imaging lens described above.

[0100] However, those skilled in the art should understand that, without departing from the technical solutions claimed in this application, the number of lenses constituting the optical imaging lens can be changed to obtain the various results and advantages described in this specification. For example, although five lenses are described as an example in the embodiments, the optical imaging lens is not limited to including five lenses. If necessary, the optical imaging lens may also include other numbers of lenses.

[0101] The following further describes specific embodiments of the optical imaging lens applicable to the above embodiments with reference to the accompanying drawings.

[0102] Example 1

[0103] The following refers to Figures 1 to 4D Describe the optical imaging lens according to Embodiment 1 of this application. Figure 1 A schematic structural diagram of the optical imaging lens according to Embodiment 1 of this application is shown, where the adjustable diaphragm STO is in the state farthest from the object side surface S1 of the first lens E1; and Figure 2 A schematic structural diagram of the optical imaging lens according to Embodiment 1 of this application is shown, where the adjustable diaphragm STO is in the state closest to the object side surface S1 of the first lens E1.

[0104] As Figure 1 and Figure 2 shown, the optical imaging lens sequentially includes, from the object side to the image side along the optical axis: an adjustable diaphragm STO, a first lens E1, a second lens E2, a third lens E3, a fourth lens E4, a fifth lens E5, and a filter E6.

[0105] The first lens E1 has a positive optical power, its object side surface S1 is convex, and its image side surface S2 is convex. The second lens E2 has a negative optical power, its object side surface S3 is concave, and its image side surface S4 is concave. The third lens E3 has a positive optical power, its object side surface S5 is convex, and its image side surface S6 is concave. The fourth lens E4 has a positive optical power, its object side surface S7 is concave, and its image side surface S8 is convex. The fifth lens E5 has a negative optical power, its object side surface S9 is convex, and its image side surface S10 is concave. The filter E6 has an object side surface S11 and an image side surface S12. The optical imaging lens has an imaging surface S13. Light from the object sequentially passes through the surfaces S1 to S12 and finally forms an image on the imaging surface S13.

[0106] Table 1 shows the basic parameter table of the optical imaging lens of Embodiment 1, where the units of the radius of curvature, thickness, and focal length are all millimeters (mm).

[0107]

[0108]

[0109] Table 1

[0110] In this embodiment, the value of the total effective focal length f of the optical imaging lens is 9.10 mm, the value of the distance TTL on the optical axis from the object side S1 of the first lens E1 to the imaging surface S13 is 9.69 mm, the value of half of the diagonal length ImgH of the effective pixel region on the imaging surface S13 is 2.80 mm, the maximum value EPDmax of the entrance pupil diameter of the optical imaging lens is 5.06 mm, the minimum value EPDmin of the entrance pupil diameter of the optical imaging lens is 3.79 mm, the maximum distance STLmax from the adjustable diaphragm STO to the intersection of the object side S1 of the first lens E1 and the optical axis is 2.00 mm, and the minimum distance STLmin from the adjustable diaphragm STO to the intersection of the object side S1 of the first lens E1 and the optical axis is -0.35 mm (i.e., the adjustable diaphragm STO is located on the image side of the intersection of the object side S1 of the first lens E1 and the optical axis).

[0111] In Embodiment 1, the object side and the image side of any one of the first lens E1 to the fifth lens E5 are aspherical surfaces, and the surface shape x of each aspherical lens can be defined by, but not limited to, the following aspherical formula:

[0112]

[0113] Where x is the sagitta, the distance from the vertex of the aspherical surface when the aspherical surface is at a position with a height of h along the optical axis; c is the paraxial curvature of the aspherical surface, c = 1 / R (i.e., the paraxial curvature c is the reciprocal of the radius of curvature R in Table 1 above); k is the conic coefficient; Ai is the correction coefficient of the i-th order of the aspherical surface. Table 2 below gives the higher-order term coefficients A 4 、A 6 、A 8 、A 10 、A 12 、A 14 、A 16 、A 18 and A 20 .

[0114] Plane number A4 A6 A8 A10 A12 A14 A16 A18 A20 S1 -1.1242E-03 -1.3150E-04 -3.9107E-05 1.5108E-05 -8.0177E-06 2.0872E-06 -3.4025E-07 2.9710E-08 -1.1666E-09 S2 -1.4905E-03 -1.8311E-04 5.0857E-04 -2.9968E-04 1.1199E-04 -2.7906E-05 4.3864E-06 -3.9161E-07 1.5225E-08 S3 3.0694E-03 -1.8542E-03 1.9815E-03 -1.0650E-03 4.3630E-04 -1.2543E-04 2.3283E-05 -2.4705E-06 1.1442E-07 S4 1.3821E-02 -1.3874E-03 7.8531E-04 4.7340E-04 -7.3025E-04 5.0204E-04 -1.8609E-04 3.6007E-05 -2.8246E-06 S5 -1.4021E-02 4.0505E-03 -2.3506E-03 1.7472E-03 -1.2269E-03 6.4417E-04 -2.1135E-04 3.7994E-05 -2.8515E-06 S6 -9.4254E-03 1.9199E-03 -1.4303E-03 3.1541E-04 -2.2719E-05 -9.7609E-06 -3.3728E-06 2.3734E-06 -3.5317E-07 S7 -1.7779E-02 3.3512E-04 -4.6358E-04 -1.3163E-03 1.4404E-03 -8.3838E-04 2.7180E-04 -4.8033E-05 3.4854E-06 S8 -2.4764E-02 9.2660E-03 -4.9926E-03 1.9568E-03 -5.7126E-04 1.1023E-04 -1.2754E-05 7.2535E-07 -8.0748E-09 S9 -9.0054E-02 2.1394E-02 -1.7666E-03 -9.9747E-04 5.2150E-04 -1.2941E-04 1.8634E-05 -1.4516E-06 4.6934E-08 S10 -9.1677E-02 2.5665E-02 -5.3825E-03 5.9336E-04 4.4034E-05 -2.8986E-05 4.8153E-06 -3.7467E-07 1.1738E-08

[0115] Table 2

[0116] Figure 3A shows the axial chromatic aberration curve of the optical imaging lens (abbreviation Figure 1 of the optical imaging lens) in Embodiment 1 when the adjustable diaphragm STO is in the state farthest from the object side S1 of the first lens E1, which represents the deviation of the convergence points of light rays of different wavelengths after passing through the lens. Figure 3B shows Figure 1The astigmatism curve of the optical imaging lens, which represents the curvature of the meridional image plane and the curvature of the sagittal image plane. Figure 3C shows Figure 1 The distortion curve of the optical imaging lens, which represents the distortion magnitude values corresponding to different image heights. Figure 3D shows Figure 1 The longitudinal chromatic aberration curve of the optical imaging lens, which represents the deviation of different image heights of light rays on the imaging plane after passing through the lens. According to Figures 3A to 3D it can be known that in Embodiment 1, the optical imaging lens in the state where the adjustable aperture STO is farthest from the object side S1 of the first lens E1 can achieve good imaging quality.

[0117] Figure 4A shows the axial chromatic aberration curve of the optical imaging lens in Embodiment 1 in the state where the adjustable aperture STO is closest to the object side S1 of the first lens E1 (abbreviation Figure 2 of the optical imaging lens), which represents the deviation of the convergence points of light rays of different wavelengths after passing through the lens. Figure 4B shows Figure 2 The astigmatism curve of the optical imaging lens, which represents the curvature of the meridional image plane and the curvature of the sagittal image plane. Figure 4C shows Figure 2 The distortion curve of the optical imaging lens, which represents the distortion magnitude values corresponding to different image heights. Figure 4D shows Figure 2 The longitudinal chromatic aberration curve of the optical imaging lens, which represents the deviation of different image heights of light rays on the imaging plane after passing through the lens. According to Figures 4A to 4D it can be known that in Embodiment 1, the optical imaging lens in the state where the adjustable aperture STO is closest to the object side S1 of the first lens E1 can achieve good imaging quality.

[0118] In summary, it can be known that when the adjustable aperture STO is adjusted within the range from the closest to the farthest from the object side S1 of the first lens E1, the optical imaging lens given in Embodiment 1 can achieve good imaging quality.

[0119] Example 2

[0120] The following refers to Figures 5 to 8D to describe the optical imaging lens according to Embodiment 2 of the present application. Figure 5 shows a schematic structural diagram of the optical imaging lens according to Embodiment 2 of the present application, wherein the adjustable aperture STO is in the state farthest from the object side S1 of the first lens E1; and Figure 6 shows a schematic structural diagram of the optical imaging lens according to Embodiment 2 of the present application, wherein the adjustable aperture STO is in the state closest to the object side S1 of the first lens E1.

[0121] As Figure 5 and Figure 6 shown, the optical imaging lens sequentially includes, along the optical axis from the object side to the image side: an adjustable diaphragm STO, a first lens E1, a second lens E2, a third lens E3, a fourth lens E4, a fifth lens E5, and a filter E6.

[0122] The first lens E1 has a positive optical power, its object side surface S1 is convex, and its image side surface S2 is convex. The second lens E2 has a negative optical power, its object side surface S3 is concave, and its image side surface S4 is concave. The third lens E3 has a positive optical power, its object side surface S5 is convex, and its image side surface S6 is concave. The fourth lens E4 has a positive optical power, its object side surface S7 is convex, and its image side surface S8 is convex. The fifth lens E5 has a negative optical power, its object side surface S9 is convex, and its image side surface S10 is concave. The filter E6 has an object side surface S11 and an image side surface S12. The optical imaging lens has an imaging surface S13. Light from the object sequentially passes through the surfaces S1 to S12 and finally forms an image on the imaging surface S13.

[0123] In this embodiment, the value of the total effective focal length f of the optical imaging lens is 9.20 mm, the value of the distance TTL on the optical axis from the object side surface S1 of the first lens E1 to the imaging surface S13 is 9.60 mm, the value of half of the diagonal length of the effective pixel region on the imaging surface S13, ImgH, is 2.80 mm, the maximum value EPDmax of the entrance pupil diameter of the optical imaging lens is 5.11 mm, the minimum value EPDmin of the entrance pupil diameter of the optical imaging lens is 3.83 mm, the maximum distance STLmax from the adjustable diaphragm STO to the intersection of the object side surface S1 of the first lens E1 and the optical axis is 1.60 mm, and the minimum distance STLmin from the adjustable diaphragm STO to the intersection of the object side surface S1 of the first lens E1 and the optical axis is -0.35 mm.

[0124] Table 3 shows the basic parameter table of the optical imaging lens of Embodiment 2, where the units of the radius of curvature, thickness, and focal length are all millimeters (mm).

[0125]

[0126]

[0127] Table 3

[0128] In Embodiment 2, the object side surface and the image side surface of any one of the first lens E1 to the fifth lens E5 are both aspherical surfaces. Table 4 below gives the high-order term coefficients A 4 , A 6 , A 8 , A 10 , A 12 , A14 , A 16 , A 18 and A 20 .

[0129] Plane number A4 A6 A8 A10 A12 A14 A16 A18 A20 S1 -1.1664E-03 -1.2398E-04 -4.6901E-05 2.6425E-05 -1.4063E-05 3.9526E-06 -6.6525E-07 5.9864E-08 -2.3166E-09 S2 -2.1625E-03 6.6103E-05 5.4148E-04 -3.3436E-04 1.1841E-04 -2.7285E-05 3.9453E-06 -3.2306E-07 1.1419E-08 S3 3.2777E-03 -2.5541E-03 2.7290E-03 -1.4809E-03 5.6519E-04 -1.4923E-04 2.5765E-05 -2.5788E-06 1.1304E-07 S4 1.7204E-02 -7.6795E-03 9.0102E-03 -6.9848E-03 4.0210E-03 -1.5588E-03 3.8073E-04 -5.1867E-05 3.0235E-06 S5 -1.2319E-02 -2.1912E-03 6.4487E-03 -6.4572E-03 4.0994E-03 -1.6726E-03 4.2033E-04 -5.8448E-05 3.4418E-06 S6 -1.0958E-02 1.1694E-03 -1.7424E-04 -8.9940E-04 8.8554E-04 -4.7716E-04 1.4705E-04 -2.4371E-05 1.6698E-06 S7 -1.8437E-02 -7.1047E-04 -8.2933E-04 -5.0803E-05 1.7876E-04 -1.5850E-04 6.3334E-05 -1.3938E-05 1.2543E-06 S8 -1.8953E-02 3.2151E-03 -1.7159E-03 5.3250E-04 -1.1539E-04 7.0855E-06 3.0617E-06 -7.8711E-07 6.2840E-08 S9 -5.8705E-02 1.3001E-02 -2.6189E-03 3.5088E-04 -2.5440E-05 -3.8785E-06 1.2119E-06 -8.4441E-08 6.3704E-10 S10 -5.5924E-02 1.4180E-02 -3.9773E-03 9.3848E-04 -1.7575E-04 2.3594E-05 -2.0648E-06 1.0341E-07 -2.1964E-09

[0130] Table 4

[0131] Figure 7A shows the axial chromatic aberration curve of the optical imaging lens (abbreviation Figure 5 of the optical imaging lens) in Embodiment 2 when the adjustable diaphragm STO is in the state farthest from the object side S1 of the first lens E1, which represents the deviation of the convergence points of light rays of different wavelengths after passing through the lens. Figure 7B shows Figure 5 the astigmatism curve of the optical imaging lens, which represents the meridional image plane curvature and the sagittal image plane curvature. Figure 7C shows Figure 5 the distortion curve of the optical imaging lens, which represents the distortion magnitude values corresponding to different image heights. Figure 7D shows Figure 5 the longitudinal chromatic aberration curve of the optical imaging lens, which represents the deviation of different image heights of light rays on the imaging plane after passing through the lens. According to Figures 7A to 7D , it can be seen that in Embodiment 2, the optical imaging lens when the adjustable diaphragm STO is in the state farthest from the object side S1 of the first lens E1 can achieve good imaging quality.

[0132] Figure 8A shows the axial chromatic aberration curve of the optical imaging lens (abbreviation Figure 6 of the optical imaging lens) in Embodiment 2 when the adjustable diaphragm STO is in the state closest to the object side of the first lens, which represents the deviation of the convergence points of light rays of different wavelengths after passing through the lens. Figure 8B shows Figure 6 the astigmatism curve of the optical imaging lens, which represents the meridional image plane curvature and the sagittal image plane curvature. Figure 8C shows Figure 6 the distortion curve of the optical imaging lens, which represents the distortion magnitude values corresponding to different image heights. Figure 8D shows Figure 6 the longitudinal chromatic aberration curve of the optical imaging lens, which represents the deviation of different image heights of light rays on the imaging plane after passing through the lens. According to Figures 8A to 8D , it can be seen that in Embodiment 2, the optical imaging lens when the adjustable diaphragm STO is in the state closest to the object side S1 of the first lens E1 can achieve good imaging quality.

[0133] In summary, it can be seen that when the adjustable diaphragm STO is adjusted within the range from the closest to the farthest distance from the object side surface S1 of the first lens E1, the optical imaging lens given in Embodiment 2 can achieve good imaging quality.

[0134] Example 3

[0135] The following refers to Figures 9 to 12D Describe the optical imaging lens according to Embodiment 3 of the present application. Figure 9 FIG. shows a schematic structural diagram of the optical imaging lens according to Embodiment 3 of the present application, wherein the adjustable diaphragm STO is in the state of being farthest from the object side surface S1 of the first lens E1; and Figure 10 FIG. shows a schematic structural diagram of the optical imaging lens according to Embodiment 3 of the present application, wherein the adjustable diaphragm STO is in the state of being closest to the object side surface S1 of the first lens E1.

[0136] As Figure 9 and Figure 10 shown, the optical imaging lens sequentially includes, along the optical axis from the object side to the image side: an adjustable diaphragm STO, a first lens E1, a second lens E2, a third lens E3, a fourth lens E4, a fifth lens E5, and a filter E6.

[0137] The first lens E1 has a positive optical power, its object side surface S1 is a convex surface, and its image side surface S2 is a convex surface. The second lens E2 has a negative optical power, its object side surface S3 is a concave surface, and its image side surface S4 is a concave surface. The third lens E3 has a negative optical power, its object side surface S5 is a convex surface, and its image side surface S6 is a concave surface. The fourth lens E4 has a positive optical power, its object side surface S7 is a convex surface, and its image side surface S8 is a convex surface. The fifth lens E5 has a negative optical power, its object side surface S9 is a convex surface, and its image side surface S10 is a concave surface. The filter E8 has an object side surface S11 and an image side surface S12. The optical imaging lens has an imaging surface S13. Light from an object sequentially passes through the surfaces S1 to S12 and finally forms an image on the imaging surface S13.

[0138] In this embodiment, the value of the total effective focal length f of the optical imaging lens is 9.21 mm, the value of the distance TTL on the optical axis from the object side surface S1 of the first lens E1 to the imaging surface S13 is 9.74 mm, the value of half of the diagonal length of the effective pixel region on the imaging surface S13, ImgH, is 2.80 mm, the maximum value EPDmax of the entrance pupil diameter of the optical imaging lens is 5.11 mm, the minimum value EPDmin of the entrance pupil diameter of the optical imaging lens is 3.84 mm, the maximum distance STLmax from the adjustable diaphragm ETO to the intersection of the object side surface S1 of the first lens E1 and the optical axis is 2.20 mm, and the minimum distance STLmin from the adjustable diaphragm STO to the intersection of the object side surface S1 of the first lens E1 and the optical axis is -0.35 mm.

[0139] Table 5 shows the basic parameter table of the optical imaging lens of Embodiment 3, where the units of the radius of curvature, thickness, and focal length are all millimeters (mm).

[0140]

[0141] Table 5

[0142] In Embodiment 3, the object side and the image side of any one of the first lens E1 to the fifth lens E5 are both aspherical surfaces. Table 6 below gives the higher-order term coefficients A 4 , A 6 , A 8 , A 10 , A 12 , A 14 , A 16 , A 18 and A 20 .

[0143] Plane number A4 A6 A8 A10 A12 A14 A16 A18 A20 S1 -1.0510E-03 -3.8247E-05 -1.4794E-04 9.7243E-05 -4.3282E-05 1.1167E-05 -1.7259E-06 1.4505E-07 -5.2238E-09 S2 -2.5388E-03 -2.0923E-04 1.0200E-03 -6.0991E-04 2.0884E-04 -4.5586E-05 6.1802E-06 -4.7303E-07 1.5610E-08 S3 3.5499E-03 -3.6671E-03 4.1583E-03 -2.3840E-03 9.1125E-04 -2.3139E-04 3.7345E-05 -3.4443E-06 1.3817E-07 S4 3.0695E-02 -3.4644E-02 3.6535E-02 -2.5740E-02 1.2553E-02 -4.0477E-03 8.1701E-04 -9.2343E-05 4.4536E-06 S5 9.7904E-03 -3.5107E-02 3.7927E-02 -2.7965E-02 1.4230E-02 -4.8243E-03 1.0340E-03 -1.2606E-04 6.6550E-06 S6 -9.8409E-03 4.5958E-04 -8.0959E-04 1.1758E-04 1.9432E-04 -1.8713E-04 7.3277E-05 -1.4206E-05 1.0765E-06 S7 -1.7656E-02 7.2581E-04 -2.2239E-03 1.5411E-03 -1.1806E-03 6.1225E-04 -2.0070E-04 3.6350E-05 -2.8582E-06 S8 -2.2052E-02 6.1336E-03 -3.2511E-03 1.1335E-03 -2.9979E-04 5.6754E-05 -7.2739E-06 5.5948E-07 -1.9009E-08 S9 -7.4572E-02 1.3332E-02 -2.7897E-04 -7.6665E-04 2.9148E-04 -5.8168E-05 6.9753E-06 -4.7443E-07 1.4109E-08 S10 -7.7610E-02 1.7280E-02 -2.4231E-03 -1.1266E-04 1.5646E-04 -3.9402E-05 5.2710E-06 -3.8175E-07 1.1816E-08

[0144] Table 6

[0145] Figure 11A shows the axial chromatic aberration curve of the optical imaging lens (abbreviation Figure 9 of the optical imaging lens) in Embodiment 3 when the adjustable diaphragm STO is in the state farthest from the object side S1 of the first lens E1, which represents the deviation of the convergence points of light rays of different wavelengths after passing through the lens. Figure 11B shows Figure 9 the astigmatism curve of the optical imaging lens, which represents the meridional image plane curvature and the sagittal image plane curvature. Figure 11C shows Figure 9 the distortion curve of the optical imaging lens, which represents the distortion magnitude values corresponding to different image heights. Figure 11D shows Figure 9 the longitudinal chromatic aberration curve of the optical imaging lens, which represents the deviation of different image heights of light rays on the imaging plane after passing through the lens. According to Figures 11A to 11D it can be known that in Embodiment 3, the optical imaging lens when the adjustable diaphragm STO is in the state farthest from the object side S1 of the first lens E1 can achieve good imaging quality.

[0146] Figure 12A shows the axial chromatic aberration curve of the optical imaging lens (abbreviation Figure 10 of the optical imaging lens) in Embodiment 3 when the adjustable diaphragm STO is in the state closest to the object side S1 of the first lens E1, which represents the deviation of the convergence points of light rays of different wavelengths after passing through the lens. Figure 12B shows Figure 10The astigmatism curve of the optical imaging lens, which represents the curvature of the meridional image plane and the curvature of the sagittal image plane. Figure 12C shows Figure 10 The distortion curve of the optical imaging lens, which represents the distortion magnitude values corresponding to different image heights. Figure 12D shows Figure 10 The longitudinal chromatic aberration curve of the optical imaging lens, which represents the deviation of different image heights on the imaging plane after light passes through the lens. According to Figures 12A to 12D it can be known that in Embodiment 3, the optical imaging lens in the state where the adjustable diaphragm STO is closest to the object side surface S1 of the first lens E1 can achieve good imaging quality.

[0147] In summary, it can be known that when the adjustable diaphragm STO is adjusted within the range from the closest to the farthest distance from the object side surface S1 of the first lens E1, the optical imaging lens given in Embodiment 3 can achieve good imaging quality.

[0148] Example 4

[0149] The following refers to Figures 13 to 16D Describe the optical imaging lens according to Embodiment 4 of the present application. Figure 13 shows a schematic structural diagram of the optical imaging lens according to Embodiment 4 of the present application, where the adjustable diaphragm STO is in the state farthest from the object side surface S1 of the first lens E1; and Figure 14 shows a schematic structural diagram of the optical imaging lens according to Embodiment 4 of the present application, where the adjustable diaphragm STO is in the state closest to the object side surface S1 of the first lens E1.

[0150] As Figure 13 and Figure 14 shown, the optical imaging lens sequentially includes, from the object side to the image side along the optical axis: an adjustable diaphragm STO, a first lens E1, a second lens E2, a third lens E3, a fourth lens E4, a fifth lens E5, and a filter E6.

[0151] The first lens E1 has a positive optical power, its object side surface S1 is a convex surface, and its image side surface S2 is a convex surface. The second lens E2 has a negative optical power, its object side surface S3 is a concave surface, and its image side surface S4 is a concave surface. The third lens E3 has a negative optical power, its object side surface S5 is a convex surface, and its image side surface S6 is a concave surface. The fourth lens E4 has a positive optical power, its object side surface S7 is a convex surface, and its image side surface S8 is a concave surface. The fifth lens E5 has a negative optical power, its object side surface S9 is a convex surface, and its image side surface S10 is a concave surface. The filter E6 has an object side surface S11 and an image side surface S12. The optical imaging lens has an imaging surface S13. Light from the object sequentially passes through the surfaces S1 to S12 and finally forms an image on the imaging surface S13.

[0152] In this embodiment, the value of the total effective focal length f of the optical imaging lens is 9.10 mm, the value of the distance TTL on the optical axis from the object side S1 of the first lens E1 to the imaging surface S13 is 9.80 mm, the value of half of the diagonal length of the effective pixel region on the imaging surface S13, ImgH, is 2.80 mm, the maximum value EPDmax of the entrance pupil diameter of the optical imaging lens is 5.06 mm, the minimum value EPDmin of the entrance pupil diameter of the optical imaging lens is 3.79 mm, the maximum distance STLmax from the adjustable diaphragm STO to the intersection of the object side S1 of the first lens E1 and the optical axis is 1.50 mm, and the minimum distance STLmin from the adjustable diaphragm STO to the intersection of the object side S1 of the first lens E1 and the optical axis is -0.35 mm.

[0153] Table 7 shows the basic parameter table of the optical imaging lens of Embodiment 4, where the units of the radius of curvature, thickness, and focal length are all millimeters (mm).

[0154]

[0155] Table 7

[0156] In Embodiment 4, the object side and the image side of any one of the first lens E1 to the fifth lens E5 are aspherical surfaces. Table 8 below gives the higher-order term coefficients A 4 、A 6 、A 8 、A 10 、A 12 、A 14 、A 16 、A 18 and A 20 .

[0157] Plane number A4 A6 A8 A10 A12 A14 A16 A18 A20 S1 -1.0137E-03 -4.1682E-05 -1.3919E-04 9.2931E-05 -4.1888E-05 1.1024E-05 -1.7474E-06 1.5154E-07 -5.6516E-09 S2 -2.1932E-03 -6.2638E-04 1.2207E-03 -6.5328E-04 2.1058E-04 -4.4290E-05 5.8869E-06 -4.4745E-07 1.4784E-08 S3 4.5613E-03 -5.0792E-03 5.0820E-03 -2.8157E-03 1.0574E-03 -2.6616E-04 4.2898E-05 -3.9815E-06 1.6189E-07 S4 3.7808E-02 -5.5509E-02 6.6680E-02 -5.2486E-02 2.7758E-02 -9.6496E-03 2.1143E-03 -2.6403E-04 1.4328E-05 S5 1.5931E-02 -5.7167E-02 7.1207E-02 -5.7528E-02 3.0882E-02 -1.0886E-02 2.4214E-03 -3.0787E-04 1.7053E-05 S6 -1.1836E-02 2.3388E-03 -2.6045E-03 2.0260E-03 -1.2906E-03 5.4178E-04 -1.3873E-04 1.9210E-05 -1.1072E-06 S7 -1.6698E-02 7.9355E-04 -1.0148E-03 -2.9649E-05 9.4382E-05 -2.9173E-05 -2.9132E-06 2.2062E-06 -2.7891E-07 S8 -2.5115E-02 8.5560E-03 -4.0388E-03 1.4022E-03 -3.8563E-04 7.7893E-05 -1.0779E-05 9.1595E-07 -3.5299E-08 S9 -5.9501E-02 1.1366E-02 -1.0225E-03 -2.9989E-04 1.5772E-04 -3.6074E-05 4.6750E-06 -3.1331E-07 8.1164E-09 S10 -5.6005E-02 1.0950E-02 -1.4073E-03 -1.3234E-04 1.1594E-04 -2.8231E-05 3.7181E-06 -2.6336E-07 7.9188E-09

[0158] Table 8

[0159] Figure 15A shows the axial chromatic aberration curve of the optical imaging lens (abbreviation Figure 13 of the optical imaging lens) in Embodiment 4 when the adjustable diaphragm STO is in the state farthest from the object side S1 of the first lens E1, which represents the deviation of the convergence points of light rays of different wavelengths after passing through the lens. Figure 15B shows Figure 13 the astigmatism curve of the optical imaging lens, which represents the meridional image plane curvature and the sagittal image plane curvature. Figure 15C shows Figure 13 the distortion curve of the optical imaging lens, which represents the distortion magnitude values corresponding to different image heights. Figure 15D shows Figure 13The longitudinal chromatic aberration curve of the optical imaging lens, which represents the deviation of different image heights on the imaging surface after the light passes through the lens. According to Figures 15A to 15D It can be known that in Embodiment 4, the optical imaging lens in the state where the adjustable aperture STO is at the farthest distance from the object side surface S1 of the first lens E1 can achieve good imaging quality.

[0160] Figure 16A Shows the axial chromatic aberration curve of the optical imaging lens in Embodiment 4 in the state where the adjustable aperture STO is at the closest distance from the object side surface S1 of the first lens E1 (abbreviation Figure 14 of the optical imaging lens), which represents the deviation of the focusing points of light rays with different wavelengths after passing through the lens. Figure 16B Shows Figure 14 the astigmatism curve of the optical imaging lens, which represents the meridional image plane curvature and the sagittal image plane curvature. Figure 16C Shows Figure 14 the distortion curve of the optical imaging lens, which represents the distortion magnitude values corresponding to different image heights. Figure 16D Shows Figure 14 the longitudinal chromatic aberration curve of the optical imaging lens, which represents the deviation of different image heights on the imaging surface after the light passes through the lens. According to Figures 16A to 16D It can be known that in Embodiment 4, the optical imaging lens in the state where the adjustable aperture STO is at the closest distance from the object side surface S1 of the first lens E1 can achieve good imaging quality.

[0161] In summary, it can be known that when the adjustable aperture STO is adjusted within the range from the closest to the farthest distance from the object side surface S1 of the first lens E1, the optical imaging lens given in Embodiment 4 can achieve good imaging quality.

[0162] Example 5

[0163] The following refers to Figures 17 to 20D to describe the optical imaging lens according to Embodiment 5 of the present application. Figure 17 Shows a schematic structural diagram of the optical imaging lens according to Embodiment 5 of the present application, where the adjustable aperture STO is in the state of being at the farthest distance from the object side surface S1 of the first lens E1; and Figure 18 Shows a schematic structural diagram of the optical imaging lens according to Embodiment 5 of the present application, where the adjustable aperture STO is in the state of being at the closest distance from the object side surface S1 of the first lens E1.

[0164] As Figure 17 and Figure 18 shown, the optical imaging lens sequentially includes, from the object side to the image side along the optical axis: an adjustable aperture STO, a first lens E1, a second lens E2, a third lens E3, a fourth lens E4, a fifth lens E5, and a filter E6.

[0165] The first lens E1 has a positive optical power, its object side S1 is convex, and its image side S2 is convex. The second lens E2 has a negative optical power, its object side S3 is convex, and its image side S4 is concave. The third lens E3 has a positive optical power, its object side S5 is convex, and its image side S6 is concave. The fourth lens E4 has a positive optical power, its object side S7 is convex, and its image side S8 is concave. The fifth lens E5 has a negative optical power, its object side S9 is convex, and its image side S10 is concave. The filter E6 has an object side S11 and an image side S12. The optical imaging lens has an imaging surface S13. The light from the object sequentially passes through the surfaces S1 to S12 and finally forms an image on the imaging surface S13.

[0166] In this embodiment, the value of the total effective focal length f of the optical imaging lens is 9.10 mm, the value of the distance TTL on the optical axis from the object side S1 of the first lens E1 to the imaging surface S13 is 9.80 mm, the value of half of the diagonal length of the effective pixel region on the imaging surface S13, ImgH, is 2.80 mm, the maximum value EPDmax of the entrance pupil diameter of the optical imaging lens is 5.06 mm, the minimum value EPDmin of the entrance pupil diameter of the optical imaging lens is 3.79 mm, the maximum distance STLmax from the adjustable diaphragm STO to the intersection of the object side S1 of the first lens E1 and the optical axis is 1.50 mm, and the minimum distance STLmin from the adjustable diaphragm STO to the intersection of the object side S1 of the first lens E1 and the optical axis is -0.35 mm.

[0167] Table 9 shows the basic parameter table of the optical imaging lens of Embodiment 5, where the units of the radius of curvature, thickness, and focal length are all millimeters (mm).

[0168]

[0169]

[0170] Table 9

[0171] In Embodiment 5, the object side and the image side of any one of the first lens E1 to the fifth lens E5 are aspherical surfaces. Table 10 below gives the higher-order term coefficients A 4 、A 6 、A 8 、A 10 、A 12 、A 14 、A 16 、A 18 and A 20 for the aspherical surfaces S1 - S10 in Embodiment 5.

[0172] Plane number A4 A6 A8 A10 A12 A14 A16 A18 A20 S1 -1.0493E-03 -1.1876E-04 -6.3002E-07 -1.4493E-05 6.0500E-06 -1.5540E-06 2.0126E-07 -1.2065E-08 1.2771E-10 S2 -2.0229E-03 1.2096E-04 -1.1092E-04 2.4300E-04 -1.3650E-04 3.8845E-05 -6.2417E-06 5.3888E-07 -1.9506E-08 S3 2.6454E-03 -1.1885E-03 5.0768E-05 6.9899E-04 -4.8600E-04 1.6558E-04 -3.1858E-05 3.3014E-06 -1.4317E-07 S4 1.6463E-02 -2.1674E-03 -1.8037E-04 1.2115E-03 -3.1056E-04 -2.5066E-04 1.9578E-04 -5.1434E-05 4.8721E-06 S5 -1.0523E-02 8.0243E-04 -1.3740E-03 1.2548E-03 -2.8368E-04 -2.1078E-04 1.6547E-04 -4.3974E-05 4.2210E-06 S6 -1.1694E-02 1.5559E-03 -3.3208E-03 3.8503E-03 -3.0312E-03 1.5075E-03 -4.5224E-04 7.4143E-05 -5.0720E-06 S7 -1.6241E-02 5.1660E-04 -1.2159E-03 2.4006E-04 1.0420E-05 -3.9963E-05 1.4662E-05 -2.9013E-06 2.6208E-07 S8 -2.0965E-02 5.2467E-03 -2.4613E-03 8.2352E-04 -2.1205E-04 4.0371E-05 -5.4953E-06 4.8161E-07 -1.9716E-08 S9 -4.6980E-02 7.4204E-03 -7.3434E-04 -1.5255E-05 2.0286E-05 -2.8574E-06 5.8831E-08 7.3413E-09 2.4131E-10 S10 -4.4825E-02 7.5633E-03 -9.4482E-04 -2.8204E-05 4.9287E-05 -1.2325E-05 1.6269E-06 -1.1859E-07 3.7803E-09

[0173] Table 10

[0174] Figure 19A shows the axial chromatic aberration curve of the optical imaging lens in Embodiment 5 when the adjustable diaphragm STO is in the state farthest from the object side S1 of the first lens E1 (abbreviation Figure 17 of the optical imaging lens), which represents the deviation of the convergence points of light rays of different wavelengths after passing through the lens. Figure 19B shows Figure 17 the astigmatism curve of the optical imaging lens, which represents the curvature of the meridional image plane and the curvature of the sagittal image plane. Figure 19C shows Figure 17 the distortion curve of the optical imaging lens, which represents the distortion magnitude values corresponding to different image heights. Figure 19D shows Figure 17 the longitudinal chromatic aberration curve of the optical imaging lens, which represents the deviation of different image heights on the imaging plane after light rays pass through the lens. According to Figures 19A to 19D it can be known that in Embodiment 5, the optical imaging lens when the adjustable diaphragm STO is in the state farthest from the object side S1 of the first lens E1 can achieve good imaging quality.

[0175] Figure 20A shows the axial chromatic aberration curve of the optical imaging lens in Embodiment 5 when the adjustable diaphragm STO is in the state closest to the object side S1 of the first lens E1 (abbreviation Figure 18 of the optical imaging lens), which represents the deviation of the convergence points of light rays of different wavelengths after passing through the lens. Figure 20B shows Figure 18 the astigmatism curve of the optical imaging lens, which represents the curvature of the meridional image plane and the curvature of the sagittal image plane. Figure 20C shows Figure 18 the distortion curve of the optical imaging lens, which represents the distortion magnitude values corresponding to different image heights. Figure 20D shows Figure 18 the longitudinal chromatic aberration curve of the optical imaging lens, which represents the deviation of different image heights on the imaging plane after light rays pass through the lens. According to Figures 20A to 20D it can be known that in Embodiment 5, the optical imaging lens when the adjustable diaphragm STO is in the state closest to the object side S1 of the first lens E1 can achieve good imaging quality.

[0176] In summary, it can be known that when the adjustable diaphragm STO is adjusted within the range from the closest to the farthest from the object side S1 of the first lens E1, the optical imaging lens given in Embodiment 5 can achieve good imaging quality.

[0177] Example 6

[0178] The following refers to Figure 21 and Figure 22Describe the optical imaging lens according to Embodiment 6 of the present application. Figure 21 A cross-sectional view of the optical imaging lens according to Embodiment 6 of the present application is shown; and Figure 22 A front view of the first adjustment module 21 of the optical imaging lens according to Embodiment 6 of the present application is shown.

[0179] As Figure 21 shown, the optical imaging lens sequentially includes, from the object side to the image side along the optical axis: a first lens E1, a second lens E2, a third lens E3, a fourth lens E4, a fifth lens E5, and a filter E6; and a lens barrel 10, and each lens and the filter E6 are arranged in the through hole of the lens barrel 10.

[0180] A diaphragm adjustment device is arranged in front of the lens barrel 10 of the optical imaging lens, and may include a first adjustment module 21 and a second adjustment module 22. Referring to Figure 22 , the first adjustment module 21 is used to form a light passing hole of an adjustable diaphragm. Each blade of the first adjustment module 21 can move independently to form a light passing hole and can adjust the light passing aperture of the light passing hole, and then adjust the aperture value Fno. The second adjustment module 22 can slide back and forth along the optical axis to adjust the position of the first adjustment module 21. By controlling the position and size of the first adjustment module 21, the aperture value Fno can be adjusted within the range of 1.8 to 2.4. During use, the first adjustment module 21 is made to be in the optimal size and position to meet the requirements of the imaging quality of the optical imaging lens.

[0181] In summary, Embodiments 1 to 5 respectively satisfy the relationships shown in Table 11.

[0182] Conditional / Example 1 2 3 4 5 (f1 + f2) / f -0.02 -0.01 -0.14 -0.13 -0.11 (R4 + R5) / (R4 - R5) 4.10 4.74 4.52 4.67 9.37 TTL / f 1.07 1.04 1.06 1.08 1.08 (STLmax - STLmin) / TTL 0.24 0.20 0.26 0.19 0.19 CT4 / T45 1.37 1.14 1.01 1.50 1.24 T34 / CT4 1.33 1.50 1.62 1.27 1.24 SAG22 / SAG31 0.87 0.98 1.18 1.19 1.26 CT2 / CT3 0.86 0.81 0.80 0.74 0.68 BFL / TD 0.18 0.16 0.17 0.16 0.16 DT11 / ImgH 0.91 0.95 0.94 0.93 0.91 DTmax / DTmin 1.48 1.47 1.44 1.46 1.44 ET3 / ET4 0.91 0.94 1.10 0.98 0.96 ET4 / CT4 0.77 0.75 0.79 0.85 0.89 DT31 / DT42 0.84 0.91 0.85 0.84 0.85 SAG41 / CT4 -0.28 -0.33 -0.31 -0.16 -0.16 ImgH / f 0.31 0.30 0.30 0.31 0.31

[0183] Table 11

[0184] The above description is only the preferred embodiments of the present application and the description of the applied technical principles. Those skilled in the art should understand that the scope of the invention involved in the present application is not limited to the technical solutions formed by the specific combination of the above technical features, and should also cover other technical solutions formed by any combination of the above technical features or their equivalent features without departing from the inventive concept. For example, the technical solutions formed by mutually replacing the above features with the technical features (but not limited to) having similar functions disclosed in the present application.

Claims

1. An optical imaging lens, characterized in that, sequentially includes from the object side to the image side along the optical axis: a diaphragm; a first lens with positive optical power, whose object side is convex and image side is convex; a second lens with negative optical power, whose image side is concave; a third lens with positive or negative optical power, whose object side is convex and image side is concave; a fourth lens with positive optical power; and a fifth lens with negative optical power, whose object side is convex and image side is concave; wherein, the effective focal length f1 of the first lens, the effective focal length f2 of the second lens, and the total effective focal length f of the optical imaging lens satisfy: -0.15 < (f1 + f2) / f < 0; the radius of curvature R4 of the image side of the second lens and the radius of curvature R5 of the object side of the third lens satisfy: 4.05 < (R4 + R5) / (R4 - R5) < 9.40; the central thickness CT4 of the fourth lens on the optical axis and the air gap T45 between the fourth lens and the fifth lens on the optical axis satisfy: 1.0 < CT4 / T45 ≤ 1.50; the number of lenses with optical power in the optical imaging lens is five.

2. The optical imaging lens according to claim 1, characterized in that, the distance TTL from the object side of the first lens to the imaging surface of the optical imaging lens on the optical axis and the total effective focal length f of the optical imaging lens satisfy: 1.00 < TTL / f < 1.

1.

3. The optical imaging lens according to claim 1, characterized in that, the diaphragm is an adjustable diaphragm; the minimum distance STLmin from the adjustable diaphragm to the intersection point of the object side of the first lens and the optical axis, the maximum distance STLmax from the adjustable diaphragm to the intersection point of the object side of the first lens and the optical axis, and the distance TTL from the object side of the first lens to the imaging surface of the optical imaging lens on the optical axis satisfy: 0.19 ≤ (STLmax - STLmin) / TTL ≤ 0.

26.

4. The optical imaging lens according to claim 3, characterized in that, includes: a first adjustment module, which is arranged on the adjustable diaphragm and is used to adjust the light passing aperture of the adjustable diaphragm; and a second adjustment module, which is used to adjust the position of the adjustable diaphragm along the optical axis.

5. The optical imaging lens according to claim 1, characterized in that, the entrance pupil diameter EPD of the optical imaging lens satisfies: 3.79 ≤ EPD ≤ 5.

11.

6. The optical imaging lens according to claim 1, characterized in that, the central thickness CT4 of the fourth lens on the optical axis and the air gap T34 between the third lens and the fourth lens on the optical axis satisfy: 1.2 < T34 / CT4 ≤ 1.

62.

7. The optical imaging lens according to claim 1, characterized in that, The axial distance SAG22 from the intersection of the image side surface of the second lens and the optical axis to the vertex of the effective radius of the image side surface of the second lens and the axial distance SAG31 from the intersection of the object side surface of the third lens and the optical axis to the vertex of the effective radius of the object side surface of the third lens satisfy: 0.87 ≤ SAG22 / SAG31 < 1.

3.

8. The optical imaging lens according to claim 1, wherein, the central thickness CT2 of the second lens on the optical axis and the central thickness CT3 of the third lens on the optical axis satisfy: 0.65 < CT2 / CT3 < 0.

9.

9. The optical imaging lens according to claim 1, wherein, the distance BFL on the optical axis from the image side surface of the fifth lens to the imaging surface of the optical imaging lens and the distance TD on the optical axis from the object side surface of the first lens to the image side surface of the fifth lens satisfy: 0.15 < BFL / TD < 0.

2.

10. The optical imaging lens according to claim 1, wherein, the maximum effective radius DT11 of the object side surface of the first lens and half of the diagonal length ImgH of the effective pixel region on the imaging surface of the optical imaging lens satisfy: 0.9 < DT11 / ImgH < 1.

0.

11. The optical imaging lens according to claim 1, wherein, the maximum value DTmax of the maximum effective radii of the respective lens surfaces from the object side surface of the first lens to the image side surface of the fifth lens and the minimum value DTmin of the maximum effective radii of the respective lens surfaces from the object side surface of the first lens to the image side surface of the fifth lens satisfy: 1.4 < DTmax / DTmin < 1.

5.

12. The optical imaging lens according to claim 1, wherein, the edge thickness ET3 of the third lens and the edge thickness ET4 of the fourth lens satisfy: 0.90 < ET3 / ET4 < 1.

11.

13. The optical imaging lens according to claim 1, wherein, the edge thickness ET4 of the fourth lens and the central thickness CT4 of the fourth lens on the optical axis satisfy: 0.73 < ET4 / CT4 < 0.

90.

14. The optical imaging lens according to claim 1, wherein, the maximum effective radius DT31 of the object side surface of the third lens and the maximum effective radius DT42 of the image side surface of the fourth lens satisfy: 0.8 < DT31 / DT42 ≤ 0.

91.

15. The optical imaging lens according to claim 1, wherein, the axial distance SAG41 from the intersection of the object side surface of the fourth lens and the optical axis to the vertex of the effective radius of the object side surface of the fourth lens and the central thickness CT4 of the fourth lens on the optical axis satisfy: -0.35 < SAG41 / CT4 < -0.

15.

16. The optical imaging lens according to any one of claims 1 to 15, wherein, Half of the diagonal length ImgH of the effective pixel area on the imaging surface of the optical imaging lens and the total effective focal length f of the optical imaging lens satisfy: 0.30 ≤ ImgH / f ≤ 0.31.

Images