Optical imaging lens

Abstract

The present application discloses an optical imaging lens, which includes, in order from the object side to the image side along the optical axis: an adjustable aperture; a first lens with positive focal power, which is made of glass and has aspherical surfaces on both the object side and the image side; a second lens with negative focal power; a third lens with negative focal power; a fourth lens with positive focal power; a fifth lens with negative focal power; a sixth lens with positive focal power; and a seventh lens with negative focal power. Half the diagonal length ImgH of the effective pixel area on the imaging surface of the optical imaging lens, the maximum entrance pupil diameter EPDmax of the optical imaging lens, and the minimum entrance pupil diameter EPDmin of the optical imaging lens meet the following conditions: 2.5 <ImgH / (EPDmax‑EPDmin)<4.5。

Description

Technical Field

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

[0002] In recent years, with the rapid advancement of science and technology and the rapid development of society and economy, people's requirements for the imaging quality of portable electronic products have become increasingly higher. Electronic products such as mobile phones and tablets will become thinner and smaller. At the same time, as the performance of charge coupled devices (CCDs) and complementary metal oxide semiconductors (CMOS) image sensors improves and their size decreases, the corresponding imaging lenses must also meet higher imaging quality requirements. As a result, specifications such as large apertures and high pixels have been developed to achieve clear imaging in low-light conditions (such as rainy days and dusk). To adapt to and meet the market's higher requirements for lens development, the design and development of optical systems with large apertures, large apertures, large image surfaces, and other characteristics, while also maintaining good imaging quality and meeting the requirements of miniaturization and lightness, is one of the current major development trends in optical lenses. Summary of the Invention

[0003] The present application provides an optical imaging lens, which may include, in order from the object side to the image side along the optical axis: an adjustable aperture; a first lens with positive focal power, which is made of glass and has aspherical surfaces on both the object side and the image side; a second lens with negative focal power; a third lens with negative focal power; a fourth lens with positive focal power; a fifth lens with negative focal power; a sixth lens with positive focal power; and a seventh lens with negative focal power. Half the diagonal length ImgH of the effective pixel area on the imaging surface of the optical imaging lens, the maximum entrance pupil diameter EPDmax of the optical imaging lens, and the minimum entrance pupil diameter EPDmin of the optical imaging lens may satisfy the following conditions: 2.5 <ImgH / (EPDmax-EPDmin)<4.5。

[0004] In one embodiment, the maximum entrance pupil diameter EPDmax of the optical imaging lens and the minimum entrance pupil diameter EPDmin of the optical imaging lens may satisfy: 1.3 <EPDmax / EPDmin<2.7。

[0005] In one embodiment, a curvature radius R1 of the object-side surface of the first lens, a curvature radius R2 of the image-side surface of the first lens, and an effective focal length f1 of the first lens may satisfy: 1.2<(R1+R2) / f1<2.0.

[0006] In one embodiment, the effective focal length f2 of the second lens and the effective focal length f3 of the third lens may satisfy: 1.4 <f2 / f3<5.0。

[0007] In one embodiment, the effective focal length f4 of the fourth lens, the effective focal length f5 of the fifth lens, the curvature radius R7 of the object side surface of the fourth lens, and the curvature radius R9 of the object side surface of the fifth lens may satisfy: 0.3<(f4-f5) / (R7-R9)<3.6.

[0008] In one embodiment, the effective focal length f6 of the sixth lens, the effective focal length f7 of the seventh lens, and the effective focal length f of the optical imaging lens may satisfy the following relationship: 1.8<(f6-f7) / f<3.0.

[0009] In one embodiment, a curvature radius R3 of the object-side surface of the second lens, a curvature radius R4 of the image-side surface of the second lens, and a curvature radius R6 of the image-side surface of the third lens may satisfy: 0.5<(R3+R4) / R6<2.7.

[0010] In one embodiment, the combined focal length f12 of the first lens and the second lens, the center thickness CT1 of the first lens on the optical axis, the air gap T12 between the first lens and the second lens on the optical axis, and the center thickness CT2 of the second lens on the optical axis may satisfy: 4.3 <f12 / (CT1+T12+CT2)<5.3。

[0011] In one embodiment, the air gap T45 between the fourth lens and the fifth lens on the optical axis, the on-axis distance SAG42 from the intersection of the image side surface of the fourth lens and the optical axis to the effective radius vertex of the image side surface of the fourth lens, and the on-axis distance SAG51 from the intersection of the object side surface of the fifth lens and the optical axis to the effective radius vertex of the object side surface of the fifth lens may satisfy: 2.2 <T45 / (SAG42-SAG51)<4.6。

[0012] In one embodiment, the edge thickness ET6 of the sixth lens, the on-axis distance SAG61 from the intersection of the object side surface of the sixth lens and the optical axis to the effective radius vertex of the object side surface of the sixth lens, and the on-axis distance SAG62 from the intersection of the image side surface of the sixth lens and the optical axis to the effective radius vertex of the image side surface of the sixth lens may satisfy: 0.2 <ET6 / (SAG61-SAG62)<3.9。

[0013] In one embodiment, the air gap T67 between the sixth lens and the seventh lens on the optical axis, the edge thickness ET7 of the seventh lens and the center thickness CT7 of the seventh lens on the optical axis may satisfy: 0.3 <T67 / (ET7+CT7)<1.3。

[0014] In one embodiment, the combined focal length f567 of the fifth lens, the sixth lens, and the seventh lens, the curvature radius R9 of the object side surface of the fifth lens, the curvature radius R11 of the object side surface of the sixth lens, and the curvature radius R13 of the object side surface of the seventh lens may satisfy: 0.6 <f567 / (R9-R11-R13)<3.2。

[0015] In one embodiment, the object-side surface of the second lens is convex, and the image-side surface is concave; and the object-side surface of the fourth lens is convex, and the image-side surface is convex.

[0016] This application adopts a seven-piece lens architecture. According to the implementation mode of this application, the first lens is made of glass material to reduce the chromatic aberration of the lens. At the same time, by setting the object side and image side of the first lens to be aspherical, the aberration of the optical system can be reduced to achieve high resolution; by reasonably setting the adjustable aperture, the ratio of half the diagonal length of the effective pixel area on the imaging surface to the difference between the maximum entrance pupil diameter and the minimum entrance pupil diameter is constrained, and the multi-aperture, large aperture and large image surface characteristics of the optical imaging lens can be simultaneously realized.

[0017] In addition, according to some embodiments of the present application, by reasonably setting and matching parameters such as the optical focal length, surface shape, curvature radius, center thickness of each lens and the air gap between each lens, the aberration, spherical aberration, field curvature, etc. of the lens can be controlled within a reasonable range, so that both the on-axis field of view and the off-axis field of view can obtain good imaging quality; and, reasonable control of the incident angle of the main light of each field of view of the lens on the image plane can be achieved; and while ensuring good processing technology, it is conducive to ensuring the miniaturization and ultra-thinness of the lens. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Other features, purposes and advantages of the present application will become more apparent through the following detailed description of non-limiting embodiments in conjunction with the accompanying drawings. In the accompanying drawings:

[0019] Figure 1 and Figure 2 Schematic diagrams showing the structure of the adjustable diaphragm of the optical imaging lens according to Example 1 of the present application in a first state and a second state respectively;

[0020] Figures 3A to 3C The axial chromatic aberration curve, astigmatism curve, and distortion curve of the optical imaging lens of Example 1 are respectively shown when the adjustable aperture is in the first state;

[0021] Figures 4A to 4C The axial chromatic aberration curve, astigmatism curve, and distortion curve of the optical imaging lens of Example 1 are respectively shown when the adjustable aperture is in the second state;

[0022] Figure 5 and Figure 6 Schematic diagrams showing the structure of the adjustable diaphragm of the optical imaging lens according to Example 2 of the present application in a first state and a second state respectively;

[0023] 7A to 7C The axial chromatic aberration curve, astigmatism curve, and distortion curve of the optical imaging lens of Example 2 are respectively shown when the adjustable aperture is in the first state;

[0024] Figures 8A to 8C The axial chromatic aberration curve, astigmatism curve, and distortion curve of the optical imaging lens of Example 2 are respectively shown when the adjustable aperture is in the second state;

[0025] Figure 9 and Figure 10 Schematic diagrams showing the structure of the adjustable diaphragm of the optical imaging lens according to Example 3 of the present application in a first state and a second state respectively;

[0026] Figures 11A to 11C The axial chromatic aberration curve, astigmatism curve, and distortion curve of the optical imaging lens of Example 3 are respectively shown when the adjustable aperture is in the first state;

[0027] 12A to 12C The axial chromatic aberration curve, astigmatism curve, and distortion curve of the optical imaging lens of Example 3 are respectively shown when the adjustable aperture is in the second state;

[0028] Figure 13 and Figure 14 Schematic diagrams showing the structure of the adjustable diaphragm of the optical imaging lens according to Example 4 of the present application in a first state and a second state respectively;

[0029] Figures 15A to 15C The axial chromatic aberration curve, astigmatism curve, and distortion curve of the optical imaging lens of Example 4 are respectively shown when the adjustable aperture is in the first state;

[0030] 16A to 16C The axial chromatic aberration curve, astigmatism curve, and distortion curve of the optical imaging lens of Example 4 are respectively shown when the adjustable aperture is in the second state;

[0031] Figure 17 and Figure 18 Schematic diagrams showing the structure of the adjustable diaphragm of the optical imaging lens according to Example 5 of the present application in a first state and a second state respectively;

[0032] 19A to 19C axial chromatic aberration curve, astigmatism curve, and distortion curve of the optical imaging lens of Example 5 when the adjustable aperture is in the first state are respectively shown; and

[0033] 20A to 20C The axial chromatic aberration curve, astigmatism curve, and distortion curve of the optical imaging lens of Example 5 when the adjustable aperture is in the second state are respectively shown. DETAILED DESCRIPTION

[0034] For a better understanding of 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 merely descriptions of exemplary embodiments of the present application and are not intended to 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.

[0035] It should be noted that in this specification, the terms "first," "second," "third," etc., are used solely to distinguish one feature from another and do not limit the features. Thus, the first lens discussed below could also be referred to as the second lens or the third lens without departing from the teachings of this application.

[0036] In the drawings, the thickness, size, and shape of the lenses are slightly exaggerated for ease of illustration. Specifically, the shapes of the spherical and aspherical surfaces shown in the drawings are provided by way of example. That is, the shapes of the spherical and aspherical surfaces are not limited to those shown in the drawings. The drawings are for illustration only and are not drawn strictly to scale.

[0037] In this document, the paraxial region refers to the area near the optical axis. If a lens surface is convex and the location of the convex surface is undefined, it means that the lens surface is convex at least in the paraxial region. If a lens surface is concave and the location of the concave surface is undefined, it means that the lens surface is concave at least in the paraxial region. In this document, the surface of each lens closest to the subject is called the object-side surface of the lens, and the surface of each lens closest to the imaging plane is called the image-side surface of the lens.

[0038] It should also be understood that the terms "comprises," "including," "having," "includes," and / or "comprising," when used in this specification, indicate the presence of the stated features, elements, and / or components, but do not preclude the presence or addition of one or more other features, elements, components, and / or combinations thereof. In addition, when expressions such as "at least one of..." appear after a list of listed features, they modify the entire list of features rather than modifying the individual elements in the list. In addition, when describing embodiments of the present application, "may" is used to mean "one or more embodiments of the present application." And, the term "exemplary" is intended to refer to an example or illustration.

[0039] Unless otherwise defined, all terms used herein (including technical and scientific terms) have the same meaning as commonly understood by those skilled in the art to which this application belongs. It should also be understood that terms (such as those defined in commonly used dictionaries) should be interpreted as having a meaning consistent with their meaning in the context of the relevant technology and will not be interpreted in an idealized or overly formal sense unless expressly defined as such herein.

[0040] It should be noted that, in the absence of conflict, the embodiments and features of the embodiments in this application can be combined with each other. The present application will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0041] The features, principles and other aspects of the present application are described in detail below.

[0042] The optical imaging lens according to an exemplary embodiment of the present application may include, for example, seven lenses, namely, a first lens, a second lens, a third lens, a fourth lens, a fifth lens, a sixth lens, and a seventh lens. These seven lenses are arranged in order from the object side to the image side along the optical axis.

[0043] In an exemplary embodiment, the first lens may have positive optical power; the second lens may have negative optical power; the third lens may have negative optical power; the fourth lens may have positive optical power; the fifth lens may have negative optical power; the sixth lens may have positive optical power; and the seventh lens may have negative optical power.

[0044] In an exemplary embodiment, the first lens may be made of glass material to reduce lens chromatic aberration; at the same time, both the object side and the image side of the first lens may be aspherical surfaces to reduce optical system aberration and achieve high resolution.

[0045] In an exemplary embodiment, the optical imaging lens may further include an adjustable diaphragm. The adjustable diaphragm may have a first state and a second state. By switching the adjustable diaphragm between the first state and the second state, adjustment of the aperture size of the diaphragm can be achieved. As an example, when the adjustable diaphragm is in the first state, the optical imaging lens may have a maximum entrance pupil diameter, and correspondingly, may have a minimum f-number; while when the adjustable diaphragm is in the second state, the optical imaging lens may have a minimum entrance pupil diameter, and correspondingly, may have a maximum f-number. As an example, the adjustable diaphragm may be located, for example, between the object side and the first lens.

[0046] In an exemplary embodiment, the optical imaging lens of the present application may satisfy the conditional formula 2.5 < ImgH / (EPDmax - EPDmin) < 4.5, where ImgH is half of the diagonal length of the effective pixel region on the imaging surface of the optical imaging lens, EPDmax is the maximum entrance pupil diameter of the optical imaging lens, and EPDmin is the minimum entrance pupil diameter of the optical imaging lens. By controlling the ratio of half of the diagonal length of the effective pixel region on the imaging surface of the optical imaging lens to the difference between the maximum entrance pupil diameter and the minimum entrance pupil diameter of the optical imaging lens within this range, characteristics such as multiple apertures, large apertures, and large image surfaces of the optical imaging lens can be achieved simultaneously. More specifically, ImgH, EPDmax, and EPDmin may satisfy: 2.6 < ImgH / (EPDmax - EPDmin) < 4.3. Exemplarily, ImgH may satisfy 8.1 mm < ImgH < 8.4 mm.

[0047] In an exemplary embodiment, the optical imaging lens of the present application may satisfy the conditional formula 1.3 < EPDmax / EPDmin < 2.7, where EPDmax is the maximum entrance pupil diameter of the optical imaging lens, and EPDmin is the minimum entrance pupil diameter of the optical imaging lens. By controlling the ratio of the maximum entrance pupil diameter of the optical imaging lens to the minimum entrance pupil diameter of the optical imaging lens within this range, the characteristics of multiple apertures and large apertures of the optical imaging lens can be achieved. More specifically, EPDmax and EPDmin may satisfy: 1.4 < EPDmax / EPDmin < 2.6.

[0048] In an exemplary embodiment, the optical imaging lens of the present application can satisfy the conditional formula 1.2 < (R1 + R2) / f1 < 2.0, where R1 is the curvature radius of the object side surface of the first lens, R2 is the curvature radius of the image side surface of the first lens, and f1 is the effective focal length of the first lens. By controlling the ratio of the sum of the curvature radius of the object side surface of the first lens and the curvature radius of the image side surface of the first lens to the effective focal length of the first lens within this range, the contribution of spherical aberration of the first lens can be controlled within a reasonable level, so as to obtain good imaging quality for the on-axis field of view. More specifically, R1, R2, and f1 can satisfy: 1.3 < (R1 + R2) / f1 < 1.9.

[0049] In an exemplary embodiment, the optical imaging lens of the present application can satisfy the conditional formula 1.4 < f2 / f3 < 5.0, where f2 is the effective focal length of the second lens and f3 is the effective focal length of the third lens. By controlling the ratio of the effective focal length of the second lens to the effective focal length of the third lens within this range, the contribution of the field curvature of the two lenses can be reasonably controlled so that their balance is in a reasonable state. More specifically, f2 and f3 can satisfy: 1.5 < f2 / f3 < 5.0.

[0050] In an exemplary embodiment, the optical imaging lens of the present application can satisfy the conditional formula 0.3 < (f4 - f5) / (R7 - R9) < 3.6, where f4 is the effective focal length of the fourth lens, f5 is the effective focal length of the fifth lens, R7 is the curvature radius of the object side surface of the fourth lens, and R9 is the curvature radius of the object side surface of the fifth lens. By controlling the ratio of the difference between the effective focal length of the fourth lens and the effective focal length of the fifth lens to the difference between the curvature radius of the object side surface of the fourth lens and the curvature radius of the object side surface of the fifth lens within this range, the incident angle of the chief ray of each field of view of the optical imaging lens on the image plane can be reasonably controlled to meet the requirements of the incident angle of the chief ray in the optical system design. More specifically, f4, f5, R7, and R9 can satisfy: 0.4 < (f4 - f5) / (R7 - R9) < 3.6.

[0051] In an exemplary embodiment, the optical imaging lens of the present application can satisfy the conditional formula 1.8 < (f6 - f7) / f < 3.0, where f6 is the effective focal length of the sixth lens, f7 is the effective focal length of the seventh lens, and f is the effective focal length of the optical imaging lens. By controlling the ratio of the difference between the effective focal length of the sixth lens and the effective focal length of the seventh lens to the effective focal length of the optical imaging lens within this range, the optical powers of the sixth and seventh lenses can be reasonably distributed so that their aberrations are in a reasonable state. More specifically, f6, f7, and f can satisfy: 1.9 < (f6 - f7) / f < 2.9.

[0052] In an exemplary embodiment, the optical imaging lens of the present application may satisfy the conditional formula 0.5 < (R3 + R4) / R6 < 2.7, where R3 is the radius of curvature of the object side surface of the second lens, R4 is the radius of curvature of the image side surface of the second lens, and R6 is the radius of curvature of the image side surface of the third lens. By controlling the ratio of the sum of the radius of curvature of the object side surface of the second lens and the radius of curvature of the image side surface of the second lens to the radius of curvature of the image side surface of the third lens within this range, the contribution rate of its fifth-order spherical aberration can be controlled to a certain extent, so that the fifth-order spherical aberration of the second lens and the third lens is controlled within a reasonable range. More specifically, R3, R4, and R6 may satisfy: 0.6 < (R3 + R4) / R6 < 2.7.

[0053] In an exemplary embodiment, the optical imaging lens of the present application may satisfy the conditional formula 4.3 < f12 / (CT1 + T12 + CT2) < 5.3, where f12 is the combined focal length of the first lens and the second lens, CT1 is the central thickness of the first lens on the optical axis, T12 is the air gap between the first lens and the second lens on the optical axis, and CT2 is the central thickness of the second lens on the optical axis. By controlling the ratio of the combined focal length of the first lens and the second lens to the sum of the central thickness of the first lens on the optical axis, the air gap between the first lens and the second lens on the optical axis, and the central thickness of the second lens on the optical axis within this range, both the processing performance can be ensured and its ultra-thin characteristics can be ensured. More specifically, f12, CT1, T12, and CT2 may satisfy: 4.4 < f12 / (CT1 + T12 + CT2) < 5.2.

[0054] In an exemplary embodiment, the optical imaging lens of the present application may satisfy the conditional formula 2.2 < T45 / (SAG42 - SAG51) < 4.6, where T45 is the air gap between the fourth lens and the fifth lens on the optical axis, SAG42 is the axial distance from the intersection of the image side surface of the fourth lens and the optical axis to the vertex of the effective radius of the image side surface of the fourth lens, and SAG51 is the axial distance from the intersection of the object side surface of the fifth lens and the optical axis to the vertex of the effective radius of the object side surface of the fifth lens. By controlling the ratio of the air gap between the fourth lens and the fifth lens on the optical axis to the difference between the axial distance from the intersection of the image side surface of the fourth lens and the optical axis to the vertex of the effective radius of the image side surface of the fourth lens and the axial distance from the intersection of the object side surface of the fifth lens and the optical axis to the vertex of the effective radius of the object side surface of the fifth lens within this range, the incident angle of the chief ray on the object side surface of the fourth lens and the fifth lens can be effectively reduced, and the matching degree between the lens and the chip can be improved. More specifically, T45, SAG42, and SAG51 may satisfy: 2.3 < T45 / (SAG42 - SAG51) < 4.55.

[0055] In an exemplary embodiment, the optical imaging lens of the present application can satisfy the conditional formula 0.2 < ET6 / (SAG61 - SAG62) < 3.9, where ET6 is the edge thickness of the sixth lens, SAG61 is the axial distance from the intersection of the object side of the sixth lens and the optical axis to the vertex of the effective radius of the object side of the sixth lens, and SAG62 is the axial distance from the intersection of the image side of the sixth lens and the optical axis to the vertex of the effective radius of the image side of the sixth lens. By controlling the ratio of the edge thickness of the sixth lens to the difference between the axial distance from the intersection of the object side of the sixth lens and the optical axis to the vertex of the effective radius of the object side of the sixth lens and the axial distance from the intersection of the image side of the sixth lens and the optical axis to the vertex of the effective radius of the image side of the sixth lens within this range, it is possible to ensure that the thickness of the sixth lens is uniform, which is beneficial to lens molding. More specifically, ET6, SAG61, and SAG62 can satisfy: 0.3 < ET6 / (SAG61 - SAG62) < 3.9.

[0056] In an exemplary embodiment, the optical imaging lens of the present application can satisfy the conditional formula 0.3 < T67 / (ET7 + CT7) < 1.3, where T67 is the air gap between the sixth lens and the seventh lens on the optical axis, ET7 is the edge thickness of the seventh lens, and CT7 is the central thickness of the seventh lens on the optical axis. By controlling the ratio of the air gap between the sixth lens and the seventh lens on the optical axis to the sum of the edge thickness of the seventh lens and the central thickness of the seventh lens on the optical axis within this range, it is possible to effectively ensure the field curvature and distortion of the system, so that the off-axis field has good imaging quality. More specifically, T67, ET7, and CT7 can satisfy: 0.4 < T67 / (ET7 + CT7) < 1.2.

[0057] In an exemplary embodiment, the optical imaging lens of the present application can satisfy the conditional formula 0.6 < f567 / (R9 - R11 - R13) < 3.2, where f567 is the combined focal length of the fifth lens, the sixth lens, and the seventh lens, R9 is the curvature radius of the object side of the fifth lens, R11 is the curvature radius of the object side of the sixth lens, and R13 is the curvature radius of the object side of the seventh lens. By controlling the combined focal length of the fifth lens, the sixth lens, and the seventh lens, the curvature radius of the object side of the fifth lens, the curvature radius of the object side of the sixth lens, and the curvature radius of the object side of the seventh lens to satisfy 0.6 < f567 / (R9 - R11 - R13) < 3.2, it is possible to reasonably distribute the optical power of the fifth to seventh lenses, improve the imaging quality, and at the same time ensure a compact structural size. More specifically, f567, R9, R11, and R13 can satisfy: 0.7 < f567 / (R9 - R11 - R13) < 3.1.

[0058] In an exemplary embodiment, the object-side surface of the second lens can be convex, and the image-side surface can be concave; the object-side surface of the fourth lens can be convex, and the image-side surface can be convex. By properly configuring the surface shapes of the second and fourth lenses, their distortion contributions can be controlled within a reasonable range, avoiding the need for later software debugging.

[0059] In an exemplary embodiment, optionally, the optical imaging lens may further include a filter for correcting color deviation and / or a protective glass for protecting a photosensitive element located on the imaging surface.

[0060] In an exemplary embodiment, the effective focal length f of the optical imaging lens may be, for example, in the range of 8.4 mm to 8.6 mm, the effective focal length f1 of the first lens may be, for example, in the range of 8.5 mm to 9.7 mm, the effective focal length f2 of the second lens may be, for example, in the range of -92.2 mm to -42.5 mm, the effective focal length f3 of the third lens may be, for example, in the range of -50.0 mm to -11.0 mm, the effective focal length f4 of the fourth lens may be, for example, in the range of 10.4 mm to 30.0 mm, the effective focal length f5 of the fifth lens may be, for example, in the range of -90.3 mm to -11.1 mm, the effective focal length f6 of the sixth lens may be, for example, in the range of 6.6 mm to 14.6 mm, and the effective focal length f7 of the seventh lens may be, for example, in the range of -9.7 mm to -7.9 mm.

[0061] The optical imaging lens according to the above-described embodiment of the present application can utilize multiple lenses, such as the seven lenses described above. By properly allocating the focal power and surface shape of each lens, and by properly setting the adjustable aperture, and properly constraining the ratio of half the diagonal length of the effective pixel area on the lens imaging surface to the difference between the maximum and minimum entrance pupil diameters of the lens, an optical imaging lens with multiple apertures, a large aperture, and a large image surface can be achieved. By selecting a glass material for the first lens, the chromatic aberration of the lens can be reduced. At the same time, by setting the object side and image side surfaces of the first lens to be aspherical, the aberration of the optical system can be reduced, achieving high resolution.

[0062] In an embodiment of the present application, at least one aspherical surface may be included among the mirror surfaces of the first lens, the second lens, the third lens, the fourth lens, the fifth lens, the sixth lens, and the seventh lens. That is, at least one aspherical surface may be included from the object side surface of the first lens to the image side surface of the seventh lens. An aspherical lens is characterized by a continuously changing curvature from the center of the lens to the periphery. Unlike spherical lenses, which have a constant curvature from the center of the lens to the periphery, aspherical lenses have a better curvature radius characteristic, with the advantages of improving distortion aberration and astigmatism. The use of aspherical lenses can minimize aberrations that occur during imaging, thereby improving imaging quality. Optionally, at least one of the object side surface and the image side surface of each of the first lens, the second lens, the third lens, the fourth lens, the fifth lens, the sixth lens, and the seventh lens is an aspherical surface. Optionally, both the object side surface and the image side surface of each of the first lens, the second lens, the third lens, the fourth lens, the fifth lens, the sixth lens, and the seventh lens are aspherical surfaces.

[0063] However, those skilled in the art will appreciate that the number of lenses comprising the optical imaging lens can be varied to achieve the various results and advantages described herein without departing from the claimed technical solutions. For example, while the embodiments describe seven lenses as an example, the optical imaging lens is not limited to including seven lenses. If desired, the optical imaging lens may also include other numbers of lenses.

[0064] Specific embodiments of the optical imaging lens applicable to the above-mentioned embodiments will be further described below with reference to the accompanying drawings.

[0065] Example 1

[0066] The following reference Figures 1 to 4C The optical imaging lens according to Example 1 of the present application is described. Figure 1 and Figure 2 Schematic diagrams of the structure of the adjustable aperture of the optical imaging lens according to Example 1 of the present application in the first state and the second state are respectively shown.

[0067] like Figure 1 、 Figure 2 As shown, the optical imaging lens 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, a sixth lens E6, a seventh lens E7, and a filter E8. Figure 1 In the state shown, the adjustable aperture STO is in the first state, the optical imaging lens has a maximum entrance pupil diameter EPDmax, and in Figure 2In the illustrated state, the adjustable aperture STO is in the second state, and the optical imaging lens has a minimum entrance pupil diameter EPDmin. The optical imaging lens according to Example 1 has a minimum aperture number of 1.67 when the adjustable aperture STO is in the first state, and a maximum aperture number of 4.00 when the adjustable aperture STO is in the second state.

[0068] The first lens E1 has positive optical power, with its object-side surface S1 being convex and its image-side surface S2 being concave. The second lens E2 has negative optical power, with its object-side surface S3 being convex and its image-side surface S4 being concave. The third lens E3 has negative optical power, with its object-side surface S5 being convex and its image-side surface S6 being concave. The fourth lens E4 has positive optical power, with its object-side surface S7 being convex and its image-side surface S8 being convex. The fifth lens E5 has negative optical power, with its object-side surface S9 being concave and its image-side surface S10 being concave. The sixth lens E6 has positive optical power, with its object-side surface S11 being convex and its image-side surface S12 being concave. The seventh lens E7 has negative optical power, with its object-side surface S13 being convex and its image-side surface S14 being concave. The filter E8 has an object-side surface S15 and an image-side surface S16. The optical imaging lens has an imaging surface S17 . Light from an object passes through the surfaces S1 to S16 in sequence and is finally imaged on the imaging surface S17 .

[0069] Table 1 shows the basic parameters of the optical imaging lens of Example 1, wherein the units of curvature radius and thickness / distance are all millimeters (mm).

[0070]

[0071] Table 1

[0072] In Example 1, the object-side surface and the image-side surface of any lens among the first lens E1 to the seventh lens E7 are both aspherical surfaces. The surface shape x of each aspherical lens can be defined by, but is not limited to, the following aspherical surface formula:

[0073]

[0074] Wherein, x is the distance vector height of the aspheric surface from the vertex of the aspheric surface at a height of h along the optical axis; c is the paraxial curvature of the aspheric surface, c = 1 / R (i.e., the paraxial curvature c is the reciprocal of the curvature radius R in Table 1 above); k is the conic coefficient; Ai is the correction coefficient of the i-th order of the aspheric surface. The following Tables 2-1 and 2-2 give the high-order coefficients A4, A6, A8, A9, A10, A11, A12, A13, A14, A15, A16, A17, A18, A19, A20, A21, A22, A23, A24, A25, A26, A27, A28, A29, A30, A31, A32, A33, A34, A35, A36, A37, A38, A39, A40, A41, A42, A43, A44, A45, A46, A47, A50, A51, A52, A53, A54, A55, A56, A57, A58, A59, A60, A61, A71, A72, A73, A74, A75, A80, A81, A9, A10, A11, A12, A13, A14, A15 10 、A 12 、A 14 、A 16 、A 18 、A 20 、A 22 、A 24、A 26 、A 28 and A 30 .

[0075] Face number A4 A6 A8 A10 A12 A14 A16 S1 4.3843E-03 -1.2714E-02 2.1244E-02 -2.2650E-02 1.6283E-02 -8.1950E-03 2.9549E-03 S2 9.7068E-04 -1.3049E-02 2.3750E-02 -2.6672E-02 1.9535E-02 -9.6880E-03 3.3092E-03 S3 4.1310E-03 -3.5333E-02 8.3079E-02 -1.2312E-01 1.2547E-01 -9.1143E-02 4.8118E-02 S4 9.3645E-03 -5.9524E-02 1.6819E-01 -2.9931E-01 3.6265E-01 -3.0977E-01 1.9027E-01 S5 -3.6108E-02 6.4414E-02 -1.2718E-01 1.8065E-01 -1.8720E-01 1.4405E-01 -8.3012E-02 S6 -3.9597E-02 2.9188E-02 6.5228E-03 -7.3299E-02 1.1760E-01 -1.0595E-01 6.2791E-02 S7 -2.4322E-02 1.8797E-02 -8.4120E-03 -1.0310E-02 1.7693E-02 -1.1843E-02 4.2152E-03 S8 -3.1137E-03 4.6581E-03 -7.1483E-03 5.2906E-03 -3.3664E-03 1.9461E-03 -9.0118E-04 S9 2.0488E-02 4.9947E-03 -1.3177E-02 1.0569E-02 -5.3300E-03 1.8301E-03 -4.4120E-04 S10 -3.3432E-02 9.0801E-03 -1.1190E-03 1.2503E-04 -1.7436E-04 9.2244E-05 -2.4776E-05 S11 -1.7869E-02 -2.9552E-03 2.6322E-03 -1.1314E-03 2.8751E-04 -4.7704E-05 5.4482E-06 S12 4.8534E-02 -2.5552E-02 7.9613E-03 -1.8997E-03 3.4274E-04 -4.5953E-05 4.5535E-06 S13 -5.1427E-02 6.0175E-03 -3.0768E-04 5.6048E-06 -6.4360E-07 1.3963E-07 -1.2524E-08 S14 -6.4498E-02 1.3143E-02 -2.3731E-03 3.4713E-04 -3.8725E-05 3.2000E-06 -1.9378E-07

[0076] Table 2-1

[0077] Face number A18 A20 A22 A24 A26 A28 A30 S1 -7.7278E-04 1.4689E-04 -2.0101E-05 1.9312E-06 -1.2370E-07 4.7447E-09 -8.2341E-11 S2 -7.7847E-04 1.2376E-04 -1.2690E-05 7.5684E-07 -1.9931E-08 0.0000E+00 0.0000E+00 S3 -1.8609E-02 5.2615E-03 -1.0739E-03 1.5389E-04 -1.4677E-05 8.3593E-07 -2.1503E-08 S4 -8.4820E-02 2.7438E-02 -6.3687E-03 1.0328E-03 -1.1103E-04 7.1059E-06 -2.0486E-07 S5 3.5739E-02 -1.1372E-02 2.6236E-03 -4.2510E-04 4.5758E-05 -2.9337E-06 8.4711E-08 S6 -2.5868E-02 7.5605E-03 -1.5666E-03 2.2539E-04 -2.1434E-05 1.2123E-06 -3.0890E-08 S7 -6.6159E-04 -7.8423E-05 6.2913E-05 -1.4415E-05 1.7631E-06 -1.1599E-07 3.2400E-09 S8 3.0635E-04 -7.4000E-05 1.2486E-05 -1.4354E-06 1.0703E-07 -4.6637E-09 9.0069E-11 S9 7.5768E-05 -9.2928E-06 8.0615E-07 -4.8201E-08 1.8855E-09 -4.3352E-11 4.4342E-13 S10 4.0800E-06 -4.4228E-07 3.2321E-08 -1.5820E-09 4.9838E-11 -9.1545E-13 7.4638E-15 S11 -4.3940E-07 2.5261E-08 -1.0305E-09 2.9181E-11 -5.4620E-13 6.0833E-15 -3.0556E-17 S12 -3.3264E-07 1.7798E-08 -6.8695E-10 1.8572E-11 -3.3307E-13 3.5531E-15 -1.7043E-17 S13 6.2849E-10 -1.9618E-11 3.8707E-13 -4.5659E-15 2.5933E-17 5.7850E-21 -5.6873E-22 S14 8.5668E-09 -2.7507E-10 6.3329E-12 -1.0179E-13 1.0841E-15 -6.8734E-18 1.9639E-20

[0078] Table 2-2

[0079] Figure 3A The axial chromatic aberration curve of the optical imaging lens of Example 1 when the aperture number is 1.67 is shown, which indicates the deviation of the convergent focus of light of different wavelengths passing through the lens. Figure 3B The astigmatism curve of the optical imaging lens of Example 1 when the aperture number is 1.67 is shown, which represents the meridional image curvature and the sagittal image curvature. Figure 3C The distortion curve of the optical imaging lens of Example 1 when the aperture number is 1.67 is shown, which represents the distortion value corresponding to different image heights. Figures 3A to 3C It can be seen that the optical imaging lens provided in Example 1 can achieve good imaging quality when the aperture number is 1.67.

[0080] Figure 4A The axial chromatic aberration curve of the optical imaging lens of Example 1 when the aperture number is 4.00 is shown, which indicates the deviation of the convergent focus of light of different wavelengths passing through the lens. Figure 4B The astigmatism curve of the optical imaging lens of Example 1 at an aperture number of 4.00 is shown, which represents the meridional image curvature and the sagittal image curvature. Figure 4C The distortion curve of the optical imaging lens of Example 1 when the aperture number is 4.00 is shown, which represents the distortion value corresponding to different image heights. Figures 4A to 4C It can be seen that the optical imaging lens provided in Example 1 can also achieve good imaging quality when the aperture number is 4.00.

[0081] Example 2

[0082] The following reference Figures 5 to 8C The optical imaging lens according to Example 2 of the present application is described. In this embodiment and the following embodiments, for the sake of brevity, some descriptions similar to Example 1 will be omitted. Figure 5 and Figure 6 Schematic diagrams of the structure of the adjustable aperture of the optical imaging lens according to Example 2 of the present application in the first state and the second state are respectively shown.

[0083] like Figure 5 、 Figure 6As shown, the optical imaging lens 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, a sixth lens E6, a seventh lens E7, and a filter E8. Figure 5 In the state shown, the adjustable aperture STO is in the first state, the optical imaging lens has a maximum entrance pupil diameter EPDmax, and in Figure 6 In the illustrated state, the adjustable aperture STO is in the second state, and the optical imaging lens has a minimum entrance pupil diameter EPDmin. The optical imaging lens according to Example 2 has a minimum aperture number of 1.66 when the adjustable aperture STO is in the first state, and a maximum aperture number of 3.75 when the adjustable aperture STO is in the second state.

[0084] The first lens E1 has positive optical power, with its object-side surface S1 being convex and its image-side surface S2 being concave. The second lens E2 has negative optical power, with its object-side surface S3 being convex and its image-side surface S4 being concave. The third lens E3 has negative optical power, with its object-side surface S5 being convex and its image-side surface S6 being concave. The fourth lens E4 has positive optical power, with its object-side surface S7 being convex and its image-side surface S8 being convex. The fifth lens E5 has negative optical power, with its object-side surface S9 being concave and its image-side surface S10 being concave. The sixth lens E6 has positive optical power, with its object-side surface S11 being convex and its image-side surface S12 being concave. The seventh lens E7 has negative optical power, with its object-side surface S13 being convex and its image-side surface S14 being concave. The filter E8 has an object-side surface S15 and an image-side surface S16. The optical imaging lens has an imaging surface S17 . Light from an object passes through the surfaces S1 to S16 in sequence and is finally imaged on the imaging surface S17 .

[0085] Table 3 shows the basic parameters of the optical imaging lens of Example 2, where the units of curvature radius and thickness / distance are all in millimeters (mm). Tables 4-1 and 4-2 show the high-order coefficients A4, A6, A8, A9, A10, A11, A12, A13, A14, A15, A16, A17, A18, A19, A20, A21, A22, A23, A24, A25, A26, A27, A28, A29, A30, A31, A32, A33, A34, A35, A36, A37, A38, A39, A40, A41, A42, A43, A44, A45, A46, A47, A48, A49, A50, A51, A52, A53, A54, A55, A56 10 、A 12 、A 14 、A 16 、A 18 、A 20 、A 22 、A 24 、A 26 、A 28 and A 30 , wherein each aspheric surface shape can be defined by formula (1) given in the above embodiment 1.

[0086]

[0087]

[0088] Table 3

[0089] Face number A4 A6 A8 A10 A12 A14 A16 S1 1.0762E-02 -4.0521E-02 8.3156E-02 -1.0514E-01 8.7966E-02 -5.0921E-02 2.0957E-02 S2 -2.6390E-03 -1.7021E-03 3.5514E-03 -4.2036E-03 3.1502E-03 -1.5890E-03 5.4997E-04 S3 -4.8913E-03 -5.2558E-04 4.2490E-03 -6.9490E-03 7.8917E-03 -6.7171E-03 4.3290E-03 S4 -2.0634E-03 -5.2803E-03 1.8516E-02 -3.2079E-02 3.6692E-02 -2.9435E-02 1.7096E-02 S5 -1.9645E-02 4.6983E-02 -1.6062E-01 3.1350E-01 -3.9420E-01 3.4052E-01 -2.0902E-01 S6 5.4756E-02 -2.3963E-01 5.1334E-01 -7.3064E-01 7.1906E-01 -5.0247E-01 2.5390E-01 S7 5.8324E-02 -1.8727E-01 3.4149E-01 -4.2102E-01 3.5699E-01 -2.1305E-01 9.1122E-02 S8 9.1897E-03 -8.1129E-03 -1.3221E-03 7.7705E-03 -9.1593E-03 6.3150E-03 -2.8769E-03 S9 3.3725E-02 -9.2395E-03 -3.0165E-03 5.2104E-03 -3.2043E-03 1.1974E-03 -3.0033E-04 S10 -2.6543E-02 2.9639E-03 2.3204E-03 -1.2860E-03 2.5566E-04 -3.8366E-06 -9.1540E-06 S11 -2.6970E-02 3.8483E-03 -2.5515E-04 -3.4659E-04 1.4191E-04 -2.8515E-05 3.6069E-06 S12 3.7851E-02 -1.7801E-02 4.8328E-03 -1.1013E-03 2.0420E-04 -2.8941E-05 3.0426E-06 S13 -5.7153E-02 9.5903E-03 -1.4247E-03 2.1607E-04 -2.6871E-05 2.4191E-06 -1.5498E-07 S14 -6.8274E-02 1.5343E-02 -3.0303E-03 4.6806E-04 -5.3688E-05 4.5013E-06 -2.7511E-07

[0090] Table 4-1

[0091] Face number A18 A20 A22 A24 A26 A28 A30 S1 -6.2198E-03 1.3350E-03 -2.0525E-04 2.2034E-05 -1.5679E-06 6.6430E-08 -1.2680E-09 S2 -1.3035E-04 2.0733E-05 -2.1113E-06 1.2406E-07 -3.1908E-09 0.0000E+00 0.0000E+00 S3 -2.0769E-03 7.2671E-04 -1.8122E-04 3.1190E-05 -3.5087E-06 2.3171E-07 -6.8032E-09 S4 -7.3014E-03 2.2984E-03 -5.2727E-04 8.5691E-05 -9.3392E-06 6.1154E-07 -1.8167E-08 S5 9.2612E-02 -2.9708E-02 6.8327E-03 -1.0981E-03 1.1708E-04 -7.4388E-06 2.1317E-07 S6 -9.3654E-02 2.5214E-02 -4.8983E-03 6.6838E-04 -6.0758E-05 3.3029E-06 -8.1219E-08 S7 -2.8192E-02 6.3041E-03 -1.0060E-03 1.1132E-04 -8.0787E-06 3.4388E-07 -6.4559E-09 S8 9.0537E-04 -2.0029E-04 3.1109E-05 -3.3233E-06 2.3257E-07 -9.5977E-09 1.7698E-10 S9 5.2385E-05 -6.4252E-06 5.5087E-07 -3.2219E-08 1.2204E-09 -2.6872E-11 2.5982E-13 S10 2.2351E-06 -2.8470E-07 2.2706E-08 -1.1741E-09 3.8436E-11 -7.2694E-13 6.0713E-15 S11 -3.0915E-07 1.8462E-08 -7.7145E-10 2.2178E-11 -4.1885E-13 4.6872E-15 -2.3586E-17 S12 -2.3466E-07 1.3163E-08 -5.2902E-10 1.4802E-11 -2.7330E-13 2.9884E-15 -1.4640E-17 S13 7.1264E-09 -2.3645E-10 5.6243E-12 -9.3697E-14 1.0393E-15 -6.8998E-18 2.0755E-20 S14 1.2255E-08 -3.9630E-10 9.1889E-12 -1.4873E-13 1.5948E-15 -1.0178E-17 2.9261E-20

[0092] Table 4-2

[0093] Figure 7A The axial chromatic aberration curve of the optical imaging lens of Example 2 when the aperture number is 1.66 is shown, which indicates the deviation of the convergent focus of light of different wavelengths passing through the lens. Figure 7B The astigmatism curve of the optical imaging lens of Example 2 when the aperture number is 1.66 is shown, which represents the meridional image curvature and the sagittal image curvature. Figure 7C The distortion curve of the optical imaging lens of Example 2 when the aperture number is 1.66 is shown, which represents the distortion value corresponding to different image heights. 7A to 7C It can be seen that the optical imaging lens provided in Example 2 can achieve good imaging quality when the aperture number is 1.66.

[0094] Figure 8A The axial chromatic aberration curve of the optical imaging lens of Example 2 when the aperture number is 3.75 is shown, which indicates the deviation of the convergent focus of light of different wavelengths passing through the lens. Figure 8B The astigmatism curve of the optical imaging lens of Example 2 when the aperture number is 3.75 is shown, which represents the meridional image curvature and the sagittal image curvature. Figure 8C The distortion curve of the optical imaging lens of Example 2 when the aperture number is 3.75 is shown, which represents the distortion value corresponding to different image heights. Figures 8A to 8C It can be seen that the optical imaging lens provided in Example 2 can also achieve good imaging quality when the aperture number is 3.75.

[0095] Example 3

[0096] The following reference Figures 9 to 12C An optical imaging lens according to Example 3 of the present application is described. Figure 9 and Figure 10 Schematic diagrams of the structure of the adjustable aperture of the optical imaging lens according to Example 3 of the present application in the first state and the second state are respectively shown.

[0097] like Figure 9 、 Figure 10 As shown, the optical imaging lens 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, a sixth lens E6, a seventh lens E7, and a filter E8. Figure 9 In the state shown, the adjustable aperture STO is in the first state, the optical imaging lens has a maximum entrance pupil diameter EPDmax, and in Figure 10 In the illustrated state, the adjustable aperture STO is in the second state, and the optical imaging lens has a minimum entrance pupil diameter EPDmin. The optical imaging lens according to Example 3 has a minimum aperture number of 1.66 when the adjustable aperture STO is in the first state, and a maximum aperture number of 3.47 when the adjustable aperture STO is in the second state.

[0098] The first lens E1 has positive optical power, with its object-side surface S1 being convex and its image-side surface S2 being concave. The second lens E2 has negative optical power, with its object-side surface S3 being convex and its image-side surface S4 being concave. The third lens E3 has negative optical power, with its object-side surface S5 being concave and its image-side surface S6 being concave. The fourth lens E4 has positive optical power, with its object-side surface S7 being convex and its image-side surface S8 being convex. The fifth lens E5 has negative optical power, with its object-side surface S9 being concave and its image-side surface S10 being convex. The sixth lens E6 has positive optical power, with its object-side surface S11 being convex and its image-side surface S12 being concave. The seventh lens E7 has negative optical power, with its object-side surface S13 being convex and its image-side surface S14 being concave. The filter E8 has an object-side surface S15 and an image-side surface S16. The optical imaging lens has an imaging surface S17 . Light from an object passes through the surfaces S1 to S16 in sequence and is finally imaged on the imaging surface S17 .

[0099] Table 5 shows the basic parameters of the optical imaging lens of Example 3, where the units of curvature radius and thickness / distance are all in millimeters (mm). Tables 6-1 and 6-2 show the high-order coefficients A4, A6, A8, A9, A10, A11, A12, A13, A14, A15, A16, A17, A18, A19, A20, A21, A22, A23, A24, A25, A26, A27, A28, A29, A30, A31, A32, A33, A34, A35, A36, A37, A38, A39, A40, A41, A42, A43, A44, A45, A46, A47, A48, A49, A50, A51, A52, A53, A54, A55, A56 10 、A 12 、A 14 、A 16 、A 18 、A 20 、A 22 、A 24 、A 26 、A 28 and A 30 , wherein each aspheric surface shape can be defined by formula (1) given in the above embodiment 1.

[0100]

[0101]

[0102] Table 5

[0103] Face number A4 A6 A8 A10 A12 A14 A16 S1 -1.2862E-03 3.9871E-03 -8.2133E-03 1.0676E-02 -9.3217E-03 5.6657E-03 -2.4529E-03 S2 -2.6539E-03 -2.1962E-03 3.8942E-03 -4.0027E-03 2.6588E-03 -1.1831E-03 3.5780E-04 S3 -9.7306E-03 1.3315E-02 -2.8732E-02 4.3931E-02 -4.5396E-02 3.2854E-02 -1.6996E-02 S4 -3.9732E-03 -6.7954E-03 3.4403E-02 -7.8187E-02 1.1239E-01 -1.0979E-01 7.5582E-02 S5 -7.7067E-02 1.9755E-01 -3.9726E-01 5.6487E-01 -5.8010E-01 4.3553E-01 -2.4109E-01 S6 -2.1102E-01 4.3382E-01 -6.7507E-01 7.7001E-01 -6.4902E-01 4.0682E-01 -1.9050E-01 S7 -2.0796E-01 3.7849E-01 -5.3784E-01 5.7255E-01 -4.5625E-01 2.7215E-01 -1.2162E-01 S8 -2.6749E-02 2.0973E-02 -1.6123E-02 1.1074E-02 -7.6250E-03 4.5488E-03 -2.0627E-03 S9 -7.2610E-03 2.0434E-02 -1.6702E-02 8.7214E-03 -3.2121E-03 8.1997E-04 -1.3980E-04 S10 -3.1493E-02 1.9631E-02 -1.2143E-02 6.3620E-03 -2.5055E-03 7.0344E-04 -1.4018E-04 S11 -5.6724E-03 -4.8995E-03 1.8555E-03 -6.0256E-04 1.4776E-04 -2.5912E-05 3.2118E-06 S12 3.1235E-02 -1.6794E-02 5.2429E-03 -1.3870E-03 2.9229E-04 -4.5990E-05 5.2703E-06 S13 -5.5685E-02 1.0256E-02 -1.7138E-03 2.7039E-04 -3.3482E-05 3.0017E-06 -1.9332E-07 S14 -6.4736E-02 1.5056E-02 -3.1166E-03 5.0609E-04 -6.1093E-05 5.3700E-06 -3.4195E-07

[0104] Table 6-1

[0105] Face number A18 A20 A22 A24 A26 A28 A30 S1 7.6569E-04 -1.7269E-04 2.7879E-05 -3.1424E-06 2.3504E-07 -1.0493E-08 2.1190E-10 S2 -7.3264E-05 9.9022E-06 -8.3351E-07 3.8595E-08 -7.1425E-10 0.0000E+00 0.0000E+00 S3 6.3536E-03 -1.7181E-03 3.3260E-04 -4.4913E-05 4.0153E-06 -2.1348E-07 5.1069E-09 S4 -3.7320E-02 1.3275E-02 -3.3727E-03 5.9694E-04 -6.9913E-05 4.8699E-06 -1.5274E-07 S5 9.8669E-02 -2.9721E-02 6.4954E-03 -1.0005E-03 1.0287E-04 -6.3305E-06 1.7621E-07 S6 6.6672E-02 -1.7332E-02 3.2955E-03 -4.4483E-04 4.0345E-05 -2.2034E-06 5.4741E-08 S7 4.0654E-02 -1.0091E-02 1.8306E-03 -2.3545E-04 2.0318E-05 -1.0540E-06 2.4823E-08 S8 6.7831E-04 -1.5947E-04 2.6462E-05 -3.0227E-06 2.2591E-07 -9.9355E-09 1.9475E-10 S9 1.4450E-05 -5.5976E-07 -6.4845E-08 1.1375E-08 -7.7484E-10 2.6454E-11 -3.7226E-13 S10 1.9921E-05 -2.0193E-06 1.4467E-07 -7.1510E-09 2.3198E-10 -4.4452E-12 3.8140E-14 S11 -2.8131E-07 1.7425E-08 -7.5849E-10 2.2708E-11 -4.4565E-13 5.1662E-15 -2.6837E-17 S12 -4.3712E-07 2.6112E-08 -1.1099E-09 3.2698E-11 -6.3398E-13 7.2712E-15 -3.7356E-17 S13 9.0103E-09 -3.0474E-10 7.4145E-12 -1.2657E-13 1.4395E-15 -9.7958E-18 3.0175E-20 S14 1.5772E-08 -5.2535E-10 1.2495E-11 -2.0680E-13 2.2618E-15 -1.4694E-17 4.2936E-20

[0106] Table 6-2

[0107] Figure 11A The axial chromatic aberration curve of the optical imaging lens of Example 3 when the aperture number is 1.66 is shown, which indicates the deviation of the convergent focus of light of different wavelengths passing through the lens. Figure 11B The astigmatism curve of the optical imaging lens of Example 3 when the aperture number is 1.66 is shown, which represents the meridional image curvature and the sagittal image curvature. Figure 11C The distortion curve of the optical imaging lens of Example 3 when the aperture number is 1.66 is shown, which represents the distortion value corresponding to different image heights. Figures 11A to 11C It can be seen that the optical imaging lens provided in Example 3 can achieve good imaging quality when the aperture number is 1.66.

[0108] Figure 12A The axial chromatic aberration curve of the optical imaging lens of Example 3 when the aperture number is 3.47 is shown, which indicates the deviation of the convergent focus of light of different wavelengths passing through the lens. Figure 12B The astigmatism curve of the optical imaging lens of Example 3 when the aperture number is 3.47 is shown, which represents the meridional image curvature and the sagittal image curvature. Figure 12C The distortion curve of the optical imaging lens of Example 3 when the aperture number is 3.47 is shown, which represents the distortion value corresponding to different image heights. 12A to 12C It can be seen that the optical imaging lens provided in Example 3 can also achieve good imaging quality when the aperture number is 3.47.

[0109] Example 4

[0110] The following reference Figures 13 to 16C An optical imaging lens according to Example 4 of the present application is described. Figure 13 and Figure 14 Schematic diagrams of the structure of the adjustable aperture of the optical imaging lens according to Example 4 of the present application in the first state and the second state are respectively shown.

[0111] like Figure 13 、 Figure 14 As shown, the optical imaging lens 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, a sixth lens E6, a seventh lens E7, and a filter E8. Figure 13 In the state shown, the adjustable aperture STO is in the first state, the optical imaging lens has a maximum entrance pupil diameter EPDmax, and in Figure 14In the illustrated state, the adjustable aperture iris STO is in the second state, and the optical imaging lens has a minimum entrance pupil diameter EPDmin. The optical imaging lens according to Example 4 has a minimum aperture number of 1.66 when the adjustable aperture iris STO is in the first state, and a maximum aperture number of 3.00 when the adjustable aperture STO is in the second state.

[0112] The first lens E1 has positive optical power, with its object-side surface S1 being convex and its image-side surface S2 being concave. The second lens E2 has negative optical power, with its object-side surface S3 being convex and its image-side surface S4 being concave. The third lens E3 has negative optical power, with its object-side surface S5 being concave and its image-side surface S6 being concave. The fourth lens E4 has positive optical power, with its object-side surface S7 being convex and its image-side surface S8 being convex. The fifth lens E5 has negative optical power, with its object-side surface S9 being concave and its image-side surface S10 being convex. The sixth lens E6 has positive optical power, with its object-side surface S11 being convex and its image-side surface S12 being concave. The seventh lens E7 has negative optical power, with its object-side surface S13 being convex and its image-side surface S14 being concave. The filter E8 has an object-side surface S15 and an image-side surface S16. The optical imaging lens has an imaging surface S17 . Light from an object passes through the surfaces S1 to S16 in sequence and is finally imaged on the imaging surface S17 .

[0113] Table 7 shows the basic parameters of the optical imaging lens of Example 4, where the units of curvature radius and thickness / distance are all in millimeters (mm). Tables 8-1 and 8-2 show the high-order coefficients A4, A6, A8, A9, A10, A11, A12, A13, A14, A15, A16, A17, A18, A19, A20, A21, A22, A23, A24, A25, A26, A27, A28, A29, A30, A31, A32, A33, A34, A35, A36, A37, A38, A39, A40, A41, A42, A43, A44, A45, A46, A47, A48, A49, A50, A51, A52, A53, A54, A55, A56 10 、A 12 、A 14 、A 16 、A 18 、A 20 、A 22 、A 24 、A 26 、A 28 and A 30 , wherein each aspheric surface shape can be defined by formula (1) given in the above embodiment 1.

[0114]

[0115]

[0116] Table 7

[0117] Face number A4 A6 A8 A10 A12 A14 A16 S1 -1.5012E-03 5.4084E-03 -1.1240E-02 1.4314E-02 -1.2078E-02 7.0530E-03 -2.9254E-03 S2 -1.5033E-03 -3.4524E-03 6.9092E-03 -8.4467E-03 6.5596E-03 -3.3688E-03 1.1709E-03 S3 -4.9631E-03 7.9138E-03 -1.7251E-02 2.5656E-02 -2.5406E-02 1.7362E-02 -8.3282E-03 S4 5.5806E-03 -3.2600E-02 9.9327E-02 -1.8767E-01 2.3922E-01 -2.1430E-01 1.3823E-01 S5 -3.0697E-02 7.1499E-02 -1.5629E-01 2.3320E-01 -2.4591E-01 1.8579E-01 -1.0148E-01 S6 -4.8396E-02 6.0396E-02 -6.6069E-02 4.6025E-02 -1.7085E-02 -8.5815E-04 4.8735E-03 S7 -6.1011E-02 8.2262E-02 -1.2429E-01 1.4968E-01 -1.3673E-01 9.2783E-02 -4.6459E-02 S8 -2.3610E-02 2.3290E-02 -3.5825E-02 4.2305E-02 -3.5811E-02 2.1406E-02 -9.1050E-03 S9 -2.2797E-02 1.8275E-02 -7.1854E-03 5.4850E-04 9.7422E-04 -6.2889E-04 2.1378E-04 S10 -2.0281E-02 5.5365E-03 -1.2980E-03 6.1372E-04 -3.5388E-04 1.3160E-04 -3.1476E-05 S11 3.0361E-02 -2.4608E-02 9.7228E-03 -2.8111E-03 5.8960E-04 -8.9094E-05 9.6914E-06 S12 5.1775E-02 -2.3440E-02 6.3372E-03 -1.2496E-03 1.8031E-04 -1.8727E-05 1.3559E-06 S13 -3.7604E-02 -7.4102E-04 1.9174E-03 -4.8153E-04 6.8089E-05 -6.3110E-06 4.0382E-07 S14 -6.1685E-02 1.1382E-02 -1.7259E-03 2.1184E-04 -2.0846E-05 1.6069E-06 -9.4339E-08

[0118] Table 8-1

[0119] Face number A18 A20 A22 A24 A26 A28 A30 S1 8.7313E-04 -1.8786E-04 2.8846E-05 -3.0803E-06 2.1720E-07 -9.0887E-09 1.7092E-10 S2 -2.7666E-04 4.3733E-05 -4.4223E-06 2.5836E-07 -6.6258E-09 0.0000E+00 0.0000E+00 S3 2.8260E-03 -6.7639E-04 1.1233E-04 -1.2482E-05 8.6470E-07 -3.2262E-08 4.4060E-10 S4 -6.4927E-02 2.2220E-02 -5.4788E-03 9.4750E-04 -1.0901E-04 7.4906E-06 -2.3252E-07 S5 4.0150E-02 -1.1424E-02 2.2933E-03 -3.1293E-04 2.7066E-05 -1.2885E-06 2.3484E-08 S6 -2.9585E-03 1.0199E-03 -2.2854E-04 3.3922E-05 -3.2259E-06 1.7824E-07 -4.3538E-09 S7 1.7112E-02 -4.6067E-03 8.9330E-04 -1.2128E-04 1.0926E-05 -5.8609E-07 1.4156E-08 S8 2.7788E-03 -6.0927E-04 9.5051E-05 -1.0287E-05 7.3347E-07 -3.0959E-08 5.8552E-10 S9 -4.7517E-05 7.2675E-06 -7.7039E-07 5.5571E-08 -2.5996E-09 7.1029E-11 -8.5958E-13 S10 5.0436E-06 -5.5270E-07 4.1545E-08 -2.1078E-09 6.9050E-11 -1.3198E-12 1.1190E-14 S11 -7.5962E-07 4.2817E-08 -1.7182E-09 4.7889E-11 -8.8144E-13 9.6381E-15 -4.7436E-17 S12 -6.4151E-08 1.6309E-09 3.7344E-12 -1.8128E-12 6.1474E-14 -9.4743E-16 5.8753E-18 S13 -1.8253E-08 5.8695E-10 -1.3331E-11 2.0872E-13 -2.1397E-15 1.2900E-17 -3.4575E-20 S14 4.1214E-09 -1.3157E-10 3.0086E-12 -4.7811E-14 5.0039E-16 -3.0970E-18 8.5802E-21

[0120] Table 8-2

[0121] Figure 15A The axial chromatic aberration curve of the optical imaging lens of Example 4 when the aperture number is 1.66 is shown, which indicates the deviation of the convergent focus of light of different wavelengths passing through the lens. Figure 15B The astigmatism curve of the optical imaging lens of Example 4 when the aperture number is 1.66 is shown, which represents the meridional image curvature and the sagittal image curvature. Figure 15C The distortion curve of the optical imaging lens of Example 4 when the aperture number is 1.66 is shown, which represents the distortion value corresponding to different image heights. Figures 15A to 15C It can be seen that the optical imaging lens provided in Example 4 can achieve good imaging quality when the aperture number is 1.66.

[0122] Figure 16A The axial chromatic aberration curve of the optical imaging lens of Example 4 at an aperture number of 3.00 is shown, which indicates the deviation of the convergent focus of light of different wavelengths passing through the lens. Figure 16B The astigmatism curve of the optical imaging lens of Example 4 at an aperture number of 3.00 is shown, which represents the meridional image curvature and the sagittal image curvature. Figure 16C The distortion curve of the optical imaging lens of Example 4 when the aperture number is 3.00 is shown, which represents the distortion value corresponding to different image heights. 16A to 16C It can be seen that the optical imaging lens provided in Example 4 can also achieve good imaging quality when the aperture number is 3.00.

[0123] Example 5

[0124] The following reference Figures 17 to 20C An optical imaging lens according to Example 5 of the present application is described. Figure 17 and Figure 18 Schematic diagrams of the structure of the adjustable aperture of the optical imaging lens according to Example 5 of the present application in the first state and the second state are respectively shown.

[0125] like Figure 17 、 Figure 18 As shown, the optical imaging lens 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, a sixth lens E6, a seventh lens E7, and a filter E8. Figure 17 In the state shown, the adjustable aperture STO is in the first state, the optical imaging lens has a maximum entrance pupil diameter EPDmax, and in Figure 18In the illustrated state, the adjustable aperture STO is in the second state, and the optical imaging lens has a minimum entrance pupil diameter EPDmin. The optical imaging lens according to Example 5 has a minimum aperture number of 1.66 when the adjustable aperture STO is in the first state, and a maximum aperture number of 2.72 when the adjustable aperture STO is in the second state.

[0126] The first lens E1 has positive optical power, with its object-side surface S1 being convex and its image-side surface S2 being concave. The second lens E2 has negative optical power, with its object-side surface S3 being convex and its image-side surface S4 being concave. The third lens E3 has negative optical power, with its object-side surface S5 being concave and its image-side surface S6 being concave. The fourth lens E4 has positive optical power, with its object-side surface S7 being convex and its image-side surface S8 being convex. The fifth lens E5 has negative optical power, with its object-side surface S9 being concave and its image-side surface S10 being convex. The sixth lens E6 has positive optical power, with its object-side surface S11 being convex and its image-side surface S12 being concave. The seventh lens E7 has negative optical power, with its object-side surface S13 being convex and its image-side surface S14 being concave. The filter E8 has an object-side surface S15 and an image-side surface S16. The optical imaging lens has an imaging surface S17 . Light from an object passes through the surfaces S1 to S16 in sequence and is finally imaged on the imaging surface S17 .

[0127] Table 9 shows the basic parameters of the optical imaging lens of Example 5, where the units of curvature radius and thickness / distance are all in millimeters (mm). Tables 10-1 and 10-2 show the high-order coefficients A4, A6, A8, A9, A10, A11, A12, A13, A14, A15, A16, A17, A18, A19, A20, A21, A22, A23, A24, A25, A26, A27, A28, A29, A30, A31, A32, A33, A34, A35, A36, A37, A38, A39, A40, A41, A42, A43, A44, A45, A46, A47, A48, A49, A50, A51, A52, A53, A54, A55, A56, A57, A58, A59, A60, A61, A71, A72, A73, A74, A75 10 、A 12 、A 14 、A 16 、A 18 、A 20 、A 22 、A 24 、A 26 、A 28 and A 30 , wherein each aspheric surface shape can be defined by formula (1) given in the above embodiment 1.

[0128]

[0129]

[0130] Table 9

[0131] Face number A4 A6 A8 A10 A12 A14 A16 S1 -2.3029E-03 8.1100E-03 -1.7057E-02 2.2422E-02 -1.9759E-02 1.2159E-02 -5.3567E-03 S2 -2.4265E-03 -2.8242E-03 5.0915E-03 -5.3673E-03 3.6282E-03 -1.6293E-03 4.9417E-04 S3 -9.0389E-03 1.1756E-02 -2.6291E-02 4.1589E-02 -4.4032E-02 3.2432E-02 -1.6997E-02 S4 8.3434E-04 -2.6344E-02 8.6103E-02 -1.6768E-01 2.1854E-01 -1.9892E-01 1.2963E-01 S5 -4.7848E-02 1.1938E-01 -2.5609E-01 3.8523E-01 -4.1622E-01 3.2685E-01 -1.8810E-01 S6 -1.0054E-01 1.7342E-01 -2.4018E-01 2.4447E-01 -1.8611E-01 1.0702E-01 -4.6675E-02 S7 -1.0892E-01 1.7554E-01 -2.4511E-01 2.6547E-01 -2.2065E-01 1.3919E-01 -6.6094E-02 S8 -2.5576E-02 2.3284E-02 -2.5941E-02 2.4635E-02 -1.8949E-02 1.1000E-02 -4.6744E-03 S9 -7.9832E-03 2.2715E-02 -1.9850E-02 1.0935E-02 -4.2297E-03 1.1485E-03 -2.1604E-04 S10 -1.3507E-02 1.2113E-02 -1.0797E-02 6.6688E-03 -2.8034E-03 8.0951E-04 -1.6359E-04 S11 7.9027E-03 -1.1987E-02 4.5917E-03 -1.3834E-03 3.1108E-04 -5.0666E-05 5.9225E-06 S12 2.4025E-02 -1.0450E-02 1.8945E-03 -2.2485E-04 2.1383E-05 -2.2812E-06 2.7876E-07 S13 -5.4266E-02 9.9555E-03 -1.6951E-03 2.6748E-04 -3.2520E-05 2.8465E-06 -1.7894E-07 S14 -6.3105E-02 1.4527E-02 -2.9992E-03 4.8466E-04 -5.8081E-05 5.0657E-06 -3.2028E-07

[0132] Table 10-1

[0133] Face number A18 A20 A22 A24 A26 A28 A30 S1 1.7105E-03 -3.9648E-04 6.6033E-05 -7.6983E-06 5.9630E-07 -2.7564E-08 5.7542E-10 S2 -1.0113E-04 1.3655E-05 -1.1529E-06 5.4157E-08 -1.0454E-09 0.0000E+00 0.0000E+00 S3 6.4160E-03 -1.7478E-03 3.4025E-04 -4.6137E-05 4.1372E-06 -2.2040E-07 5.2779E-09 S4 -6.1225E-02 2.0983E-02 -5.1638E-03 8.8878E-04 -1.0154E-04 6.9151E-06 -2.1244E-07 S5 7.9551E-02 -2.4620E-02 5.4990E-03 -8.6149E-04 8.9699E-05 -5.5686E-06 1.5584E-07 S6 1.5417E-02 -3.8255E-03 7.0095E-04 -9.1952E-05 8.1656E-06 -4.3958E-07 1.0827E-08 S7 2.3455E-02 -6.1579E-03 1.1755E-03 -1.5823E-04 1.4214E-05 -7.6373E-07 1.8545E-08 S8 1.4411E-03 -3.2045E-04 5.0754E-05 -5.5752E-06 4.0313E-07 -1.7236E-08 3.2978E-10 S9 2.7266E-05 -2.1203E-06 7.1376E-08 3.0645E-09 -4.3832E-10 1.8326E-11 -2.8363E-13 S10 2.3433E-05 -2.3871E-06 1.7159E-07 -8.5015E-09 2.7625E-10 -5.2995E-12 4.5504E-14 S11 -4.9592E-07 2.9679E-08 -1.2574E-09 3.6828E-11 -7.0937E-13 8.0884E-15 -4.1382E-17 S12 -2.8451E-08 2.0652E-09 -1.0235E-10 3.3841E-12 -7.1420E-14 8.7022E-16 -4.6582E-18 S13 8.1492E-09 -2.6968E-10 6.4296E-12 -1.0771E-13 1.2039E-15 -8.0641E-18 2.4485E-20 S14 1.4682E-08 -4.8655E-10 1.1524E-11 -1.9006E-13 2.0727E-15 -1.3434E-17 3.9174E-20

[0134] Table 10-2

[0135] Figure 19A The axial chromatic aberration curve of the optical imaging lens of Example 5 when the aperture number is 1.66 is shown, which indicates the deviation of the convergent focus of light of different wavelengths passing through the lens. Figure 19B The astigmatism curve of the optical imaging lens of Example 5 when the aperture number is 1.66 is shown, which represents the meridional image curvature and the sagittal image curvature. Figure 19C The distortion curve of the optical imaging lens of Example 5 when the aperture number is 1.66 is shown, which represents the distortion value corresponding to different image heights. 19A to 19C It can be seen that the optical imaging lens provided in Example 5 can achieve good imaging quality when the aperture number is 1.66.

[0136] Figure 20A The axial chromatic aberration curve of the optical imaging lens of Example 5 at an aperture number of 2.72 is shown, which indicates the deviation of the convergent focus of light of different wavelengths passing through the lens. Figure 20B The astigmatism curve of the optical imaging lens of Example 5 when the aperture number is 2.72 is shown, which represents the meridional image curvature and the sagittal image curvature. Figure 20C The distortion curve of the optical imaging lens of Example 5 when the aperture number is 2.72 is shown, which represents the distortion value corresponding to different image heights. 20A to 20C It can be seen that the optical imaging lens provided in Example 5 can also achieve good imaging quality when the aperture number is 2.72.

[0137] In addition, in Examples 1 to 5, the effective focal lengths f1 to f7 of each lens, the effective focal length f of the optical imaging lens, the distance TTL along the optical axis from the object-side surface of the first lens to the imaging plane of the optical imaging lens, half the diagonal length of the effective pixel area on the imaging plane ImgH, the minimum aperture number FNOmin of the optical imaging lens, and the maximum aperture number FNOmax of the optical imaging lens are shown in Table 11.

[0138] Parameters / Example 1 2 3 4 5 f1(mm) 9.64 9.57 9.03 8.60 8.87 f2(mm) -92.09 -77.64 -54.73 -42.63 -51.48 f3(mm) -23.33 -49.86 -11.02 -26.67 -17.43 f4(mm) 19.69 29.92 10.45 21.62 16.23 f5(mm) -11.60 -11.16 -25.39 -90.24 -79.93 f6(mm) 6.70 6.72 10.15 11.61 14.52 f7(mm) -9.60 -9.58 -9.58 -7.94 -9.68 f(mm) 8.52 8.48 8.48 8.48 8.48 TTL(mm) 10.15 10.15 10.15 10.15 10.15 ImgH(mm) 8.27 8.27 8.27 8.27 8.27 FNOmin 1.67 1.66 1.66 1.66 1.66 FNOmax 4.00 3.75 3.47 3.00 2.72

[0139] Table 11 Examples 1 to 5 respectively satisfy the conditions shown in Table 12.

[0140] Conditional formula / Example 1 2 3 4 5 ImgH / (EPDmax-EPDmin) 2.78 2.91 3.10 3.63 4.16 EPDmax / EPDmin 2.40 2.26 2.09 1.81 1.64 (R1+R2) / f1 1.35 1.39 1.59 1.87 1.67 f2 / f3 3.95 1.56 4.96 1.60 2.95 (f4-f5) / (R7-R9) 1.32 0.44 1.71 2.29 3.52 (f6-f7) / f 1.91 1.92 2.33 2.31 2.85 (R3+R4) / R6 1.72 0.77 2.62 0.67 1.33 f12 / (CT1+T12+CT2) 5.07 5.09 4.77 4.57 4.71 T45 / (SAG42-SAG51) 2.41 2.86 4.13 2.64 4.50 ET6 / (SAG61-SAG62) 3.02 3.15 3.87 0.33 3.21 T67 / (ET7+CT7) 1.01 0.98 1.08 0.52 1.14 f567 / (R9-R11-R13) 3.01 2.60 1.71 0.72 1.48

[0141] Table 12

[0142] The present application also provides an imaging device, which is provided with an electronic photosensitive element for imaging. The electronic photosensitive element can be a charge coupled device (CCD) or a complementary metal oxide semiconductor (CMOS). The imaging device can be a standalone imaging device such as a digital camera, or an imaging module integrated into a mobile electronic device such as a mobile phone. The imaging device is equipped with the optical imaging lens described above.

[0143] The above description is merely a preferred embodiment of the present application and an illustration of the technical principles employed. Those skilled in the art should understand that the scope of protection provided in this application is not limited to the technical solutions formed by a specific combination of the above-mentioned technical features, but also encompasses other technical solutions formed by any combination of the above-mentioned technical features or their equivalents without departing from the concept of this application. For example, a technical solution formed by replacing the above-mentioned features with (but not limited to) technical features with similar functions disclosed in this application.

Claims

1. An optical imaging lens, characterized in that: Along the optical axis from the object side to the image side, they include: Adjustable iris; The first lens has positive refractive power, its object-side surface is convex, its image-side surface is concave, and its material is glass, and both the object-side surface and the image-side surface are aspherical; a second lens having negative optical power, the object-side surface of which is convex and the image-side surface of which is concave; a third lens element having negative optical power and a concave image-side surface; a fourth lens element having positive optical power, with a convex object-side surface and a convex image-side surface; a fifth lens element having negative optical power and a concave object-side surface; a sixth lens element having positive optical power, the object-side surface of which is convex and the image-side surface of which is concave; and The seventh lens has a negative optical power, and its object side surface is convex and its image side surface is concave. The number of lenses having optical power in the optical imaging lens is seven; The optical imaging lens meets the following requirements: 2.78≤ImgH / (EPDmax-EPDmin)≤4.16, 1.56≤f2 / f3<5.0, 0.4<(f4-f5) / (R7-R9)≤3.52, where ImgH is half the diagonal length of the effective pixel area on the imaging plane of the optical imaging lens, EPDmax is the maximum entrance pupil diameter of the optical imaging lens, EPDmin is the minimum entrance pupil diameter of the optical imaging lens, f2 is the effective focal length of the second lens element, f3 is the effective focal length of the third lens element, f4 is the effective focal length of the fourth lens element, f5 is the effective focal length of the fifth lens element, R7 is the radius of curvature of the object side surface of the fourth lens element, and R9 is the radius of curvature of the object side surface of the fifth lens element.

2. The optical imaging lens according to claim 1, wherein: satisfy: 1.64≤EPDmax / EPDmin≤2.

40.

3. The optical imaging lens according to claim 1, wherein: The curvature radius R1 of the object-side surface of the first lens, the curvature radius R2 of the image-side surface of the first lens, and the effective focal length f1 of the first lens satisfy: 1.35≤(R1+R2) / f1<1.

9.

4. The optical imaging lens according to claim 1, wherein: The effective focal length f6 of the sixth lens, the effective focal length f7 of the seventh lens, and the effective focal length f of the optical imaging lens satisfy the following requirements: 1.9<(f6-f7) / f≤2.

85.

5. The optical imaging lens according to claim 1, wherein: The curvature radius R3 of the object-side surface of the second lens, the curvature radius R4 of the image-side surface of the second lens, and the curvature radius R6 of the image-side surface of the third lens satisfy: 0.67≤(R3+R4) / R6≤2.

62.

6. The optical imaging lens according to any one of claims 1 to 5, wherein: The combined focal length f12 of the first lens and the second lens, the center thickness CT1 of the first lens on the optical axis, the air gap T12 between the first lens and the second lens on the optical axis, and the center thickness CT2 of the second lens on the optical axis satisfy the following conditions: 4.57≤f12 / (CT1+T12+CT2)≤5.

09.

7. The optical imaging lens according to any one of claims 1 to 5, wherein: An air gap T45 between the fourth lens and the fifth lens on the optical axis, an on-axis distance SAG42 from the intersection of the image-side surface of the fourth lens and the optical axis to the vertex of the effective radius of the image-side surface of the fourth lens, and an on-axis distance SAG51 from the intersection of the object-side surface of the fifth lens and the optical axis to the vertex of the effective radius of the object-side surface of the fifth lens satisfy the following requirements: 2.41≤T45 / (SAG42-SAG51)≤4.

50.

8. The optical imaging lens according to any one of claims 1 to 5, wherein: The edge thickness ET6 of the sixth lens, the on-axis distance SAG61 from the intersection of the object-side surface of the sixth lens and the optical axis to the vertex of the effective radius of the object-side surface of the sixth lens, and the on-axis distance SAG62 from the intersection of the image-side surface of the sixth lens and the optical axis to the vertex of the effective radius of the image-side surface of the sixth lens satisfy: 0.3 <ET6 / (SAG61-SAG62)<3.9。 9. The optical imaging lens according to any one of claims 1 to 5, wherein: The air gap T67 between the sixth lens and the seventh lens on the optical axis, the edge thickness ET7 of the seventh lens, and the center thickness CT7 of the seventh lens on the optical axis satisfy the following conditions: 0.52≤T67 / (ET7+CT7)≤1.

14.

10. The optical imaging lens according to any one of claims 1 to 5, wherein: The combined focal length f567 of the fifth lens, the sixth lens, and the seventh lens, the curvature radius R9 of the object-side surface of the fifth lens, the curvature radius R11 of the object-side surface of the sixth lens, and the curvature radius R13 of the object-side surface of the seventh lens satisfy: 0.7 <f567 / (R9-R11-R13)≤3.01。

Images