Optical imaging lens

Abstract

The invention discloses an optical imaging lens, and the lens sequentially comprises a first lens with positive focal power from an object side to an image side along an optical axis, a second lens with negative focal power, a third lens with positive focal power, a fourth lens with negative focal power, a fifth lens and a sixth lens from the object side to the image side, the object side surface of the second lens is a convex surface, and the image side surface of the second lens is a concave surface; the object side surface of the third lens is a convex surface; the fourth lens has negative focal power; a fifth lens element with a convex object-side surface and a concave image-side surface; the sixth lens has positive focal power, and the object side surface of the sixth lens is a convex surface; the seventh lens has negative focal power, and the image side surface of the seventh lens is a concave surface; the half ImgH of the diagonal length of an effective pixel area on the imaging surface of the optical imaging lens satisfies 5 mmlt. ImgHlt, ImgHlt; 7 mm; the effective focal length f of the optical imaging lens, the entrance pupil diameter EPD of the optical imaging lens and the maximum half field angle Semi-FOV of the optical imaging lens meet the following conditions: 1.5 lt; f / EPD * tan (Semi-FOV) lt; 2; the effective focal length f7 of the seventh lens and the central thickness CT7 of the seventh lens on the optical axis meet the following conditions:-13lt; f7 / CT7lt; and 8.

Description

Technical Field

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

[0002] With the continuous development of mobile phone photography technology, various types and functions of mobile phone lenses have emerged on the market, such as wide-angle lenses, telephoto lenses, fish-eye lenses, and portrait lenses. However, common mobile phone lenses still have problems in aspects such as imaging accuracy, optical anti-shake, noise processing, and dynamic range. These problems prevent the photos taken by mobile phones from reaching the level of single-lens reflex cameras in terms of details and quality. In response to these problems, the present invention designs a large image plane mobile phone lens. By using a large image plane mobile phone lens to increase the details and clarity of shooting, it can promote the development of mobile phone photography technology and improve consumer satisfaction and experience. Summary of the Invention

[0003] This application provides an optical imaging lens, which sequentially includes, along the optical axis from the object side to the image side: a first lens with a positive optical power, whose object side is convex and image side is concave; a second lens with a negative optical power, whose object side is convex and image side is concave; a third lens with a positive optical power, whose object side is convex; a fourth lens with a negative optical power; a fifth lens, whose object side is convex and image side is concave; a sixth lens with a positive optical power, whose object side is convex; a seventh lens with a negative optical power, whose image side is concave; half of the diagonal length ImgH of the effective pixel area on the imaging plane of the optical imaging lens satisfies: 5mm < ImgH < 7mm; the effective focal length f of the optical imaging lens, the entrance pupil diameter EPD of the optical imaging lens, and the maximum half field of view Semi-FOV of the optical imaging lens satisfy: 1.5 < f / EPD × tan(Semi-FOV) < 2; and the effective focal length f7 of the seventh lens and the central thickness CT7 of the seventh lens on the optical axis satisfy: -13 < f7 / CT7 < -8.

[0004] In one embodiment, the effective focal length f1 of the first lens, the effective focal length f2 of the second lens, the effective focal length f3 of the third lens, and the effective focal length f4 of the fourth lens satisfy: -5 < f2 / f1 + f4 / f3 < -3.

[0005] In one embodiment, the effective focal length f of the optical imaging lens, the on-axis distance TTL from the object side of the first lens to the imaging plane of the optical imaging lens, and half of the diagonal length ImgH of the effective pixel area on the imaging plane of the optical imaging lens satisfy: 3 < f / (TTL - ImgH) < 6.

[0006] In one embodiment, the optical imaging lens further includes a stop, which is disposed on the object side of the first lens or between the first lens and the second lens; an entrance pupil diameter EPD of the optical imaging lens, an axial distance TTL from the object side of the first lens to the imaging surface of the optical imaging lens, and an axial distance SL from the stop to the imaging surface of the optical imaging lens satisfy the following conditions: <EPD / (TTL-SL)<6。

[0007] In one embodiment, the effective focal length f6 of the sixth lens and the effective focal length f7 of the seventh lens satisfy: <f6 / f7<0。

[0008] In one embodiment, the effective focal length f1 of the first lens, the curvature radius R1 of the object-side surface of the first lens, and the curvature radius R2 of the image-side surface of the first lens satisfy: 0.5≤f1 / (R2-R1)<1.

[0009] In one embodiment, the axial distance SAG11 between the intersection of the object side surface of the first lens and the optical axis to the effective radius vertex of the object side surface of the first lens, and the axial distance SAG22 between the intersection of the image side surface of the second lens and the optical axis to the effective radius vertex of the image side surface of the second lens satisfy: 1 <SAG11 / SAG22<4。

[0010] In one embodiment, the on-axis distance SAG41 between the intersection of the object side surface of the fourth lens and the optical axis to the effective radius vertex of the object side surface of the fourth lens, the on-axis distance SAG42 between 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, the on-axis distance SAG51 between 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, and the on-axis distance SAG52 between the intersection of the image side surface of the fifth lens and the optical axis to the effective radius vertex of the image side surface of the fifth lens satisfy: 0<(SAG41+SAG42) / (SAG51+SAG52)<1.5.

[0011] In one embodiment, the air interval T45 between the fourth lens and the fifth lens on the optical axis, the air interval T56 between the fifth lens and the sixth lens on the optical axis, and the air interval T56 between the sixth lens and the seventh lens on the optical axis satisfy: 0.5<(T45+T56) / T67<1.

[0012] In one embodiment, the average value CTave of the center thicknesses of the first lens to the seventh lens on the optical axis and the center thickness CT4 of the fourth lens on the optical axis satisfy: 1.2 <CTave / CT4<1.5。

[0013] In one embodiment, the maximum value ATmax of the air gap on the optical axis between any two adjacent lenses among the first lens to the seventh lens, and the on-axis distance BFL from the image side of the seventh lens to the imaging surface of the optical imaging lens satisfy: 0.8 < ATmax / BFL < 1.3.

[0014] In one embodiment, the number V50 of lenses with an Abbe number greater than 50 among the first lens to the seventh lens satisfies: 3 ≤ V50 ≤ 5.

[0015] In one embodiment, half of the diagonal length ImgH of the effective pixel region on the imaging surface of the optical imaging lens, the entrance pupil diameter EPD of the optical imaging lens, the effective radius DT11 of the object side of the first lens, and the effective radius DT71 of the object side of the seventh lens satisfy: 0.9 < (DT71 - DT11) / (ImgH - EPD) < 1.2.

[0016] In one embodiment, half of the diagonal length ImgH of the effective pixel region on the imaging surface of the optical imaging lens and the effective radius DT11 of the object side of the first lens satisfy: 3 < ImgH / DT11 < 5.

[0017] The seven-piece optical imaging lens proposed in this application rationally matches the optical power and surface shape of the lenses and satisfies: 5 mm < ImgH < 7 mm and -13 < f7 / CT7 < -8. This setting can reasonably control the effective focal length and central thickness of the seventh lens while ensuring that the lens meets the large image surface, which is beneficial to reducing the sensitivity of the seventh lens and weakening ghost images. In addition, the effective focal length of the seventh lens is negative, which is beneficial to light divergence. While ensuring the size of the imaging surface, it is beneficial to reduce the lens aperture, facilitating the later molding and assembly of the lens. BRIEF DESCRIPTION OF THE DRAWINGS

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

[0019] Figure 1 FIG. shows a schematic structural diagram of an optical imaging lens according to Embodiment 1 of this application;

[0020] FIG. 2A to FIG. 2D Respectively show the axial chromatic aberration curve, astigmatism curve, distortion curve, and lateral chromatic aberration curve of the optical imaging lens of Embodiment 1;

[0021] Figure 3 FIG. shows a schematic structural diagram of an optical imaging lens according to Embodiment 2 of this application;

[0022] FIG. 4A to FIG. 4D Respectively show the axial chromatic aberration curve, astigmatism curve, distortion curve, and lateral chromatic aberration curve of the optical imaging lens of Embodiment 2;

[0023] Figure 5 A schematic structural diagram of an optical imaging lens according to Embodiment 3 of the present application is shown;

[0024] FIG. 6A to FIG. 6D The axial chromatic aberration curve, astigmatism curve, distortion curve and magnification chromatic aberration curve of the optical imaging lens of Example 3 are respectively shown;

[0025] Figure 7 A schematic structural diagram of an optical imaging lens according to Embodiment 4 of the present application is shown;

[0026] FIG. 8A to FIG. 8D The axial chromatic aberration curve, astigmatism curve, distortion curve and magnification chromatic aberration curve of the optical imaging lens of Example 4 are respectively shown;

[0027] Fig. 9 A schematic structural diagram of an optical imaging lens according to Embodiment 5 of the present application is shown;

[0028] FIG. 10A to FIG. 10D The axial chromatic aberration curve, astigmatism curve, distortion curve and magnification chromatic aberration curve of the optical imaging lens of Example 5 are respectively shown;

[0029] Fig.11 A schematic structural diagram of an optical imaging lens according to Embodiment 6 of the present application is shown; and

[0030] FIG. 12A to FIG. 12D The axial chromatic aberration curve, astigmatism curve, distortion curve and magnification chromatic aberration curve of the optical imaging lens of Example 6 are respectively shown. DETAILED DESCRIPTION

[0031] In order to better understand the present application, a more detailed description will be made of various aspects of the present application 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 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.

[0032] It should be noted that in this specification, the expressions of 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 teaching of the present application, the first lens discussed below may also be referred to as the second lens or the third lens.

[0033] In the drawings, the thickness, size and shape of the lenses have been slightly exaggerated for ease of explanation. Specifically, the shapes of the spherical or aspherical surfaces shown in the drawings are shown by way of example. That is, the shapes of the spherical or aspherical surfaces are not limited to the shapes of the spherical or aspherical surfaces shown in the drawings. The drawings are only examples and are not drawn strictly to scale.

[0034] In this article, 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 is called the object side of the lens, and the surface of each lens closest to the imaging plane is called the image side of the lens.

[0035] 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 exclude the presence or addition of one or more other features, elements, components and / or combinations thereof. In addition, when expressions such as "at least one of..." appear after a list of listed features, they modify the entire listed 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.

[0036] Unless otherwise defined, all terms (including technical terms and scientific terms) used in this article have the same meaning as those commonly understood by ordinary technicians in the field to which this application belongs. It should also be understood that terms (such as terms defined in commonly used dictionaries) should be interpreted as having the same meaning as their meaning in the context of the relevant technology, and will not be interpreted in an idealized or overly formal sense unless explicitly defined in this article.

[0037] It should be noted that, in the absence of conflict, the embodiments and features in the embodiments of the present 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.

[0038] The features, principles and other aspects of the present application are described in detail below.

[0039] The optical imaging lens according to an exemplary embodiment of the present application may include seven lenses with optical powers, namely a first lens, a second lens, a third lens, a fourth lens, a fifth lens, a sixth lens, and a seventh lens, which are arranged in sequence from the object side to the image side along the optical axis. Among them, the first lens has a positive optical power, its object side is convex, and its image side is concave; the second lens has a negative optical power, its object side is convex, and its image side is concave; the third lens has a positive optical power, its object side is convex; the fourth lens has a negative optical power; the fifth lens has a positive or negative optical power, its object side is convex, and its image side is concave; the sixth lens has a positive optical power, its object side is convex; the seventh lens has a negative optical power, and its image side is concave. Reasonably setting the optical powers and surface types of each lens can effectively balance aberrations and improve the resolution of the lens.

[0040] In an exemplary embodiment, half of the diagonal length of the effective pixel area on the imaging surface of the optical imaging lens, ImgH, satisfies: 5mm < ImgH < 7mm. This setting can ensure that the lens has the characteristic of a large imaging surface, can output larger-sized images, and display more details.

[0041] In an exemplary embodiment, the ratio of the effective focal length f7 of the seventh lens to the central thickness CT7 of the seventh lens on the optical axis satisfies: -13 < f7 / CT7 < -8. Reasonably controlling the ratio of the effective focal length and the central thickness of the seventh lens is beneficial to reducing the sensitivity of the seventh lens and weakening ghost images. In addition, the effective focal length of the seventh lens is negative, which is beneficial to the divergence of light. While ensuring the size of the imaging surface, it is beneficial to reduce the lens aperture, facilitating the later forming and assembly of the lens.

[0042] In an exemplary embodiment, the optical imaging lens according to an exemplary embodiment of the present application further includes a diaphragm, and the diaphragm can be set at an appropriate position as needed. Exemplarily, the diaphragm can be set on the object side of the first lens or between the first lens and the second lens.

[0043] In an exemplary embodiment, the optical imaging lens according to the present application can satisfy: -5 < f2 / f1 + f4 / f3 < -3, where f1 is the effective focal length of the first lens, f2 is the effective focal length of the second lens, f3 is the effective focal length of the third lens, and f4 is the effective focal length of the fourth lens. Satisfying -5 < f2 / f1 + f4 / f3 < -3 is beneficial to controlling the aperture of the lens to avoid too large a lens aperture, and is also beneficial to reasonably distributing the focal length values to avoid excessive concentration of optical power, resulting in too high optical sensitivity of a certain lens.

[0044] In an exemplary embodiment, the optical imaging lens according to the present application may satisfy: 3 < f / (TTL - ImgH) < 6, where f is the effective focal length of the optical imaging lens, TTL is the on-axis distance from the object side of the first lens to the imaging surface of the optical imaging lens, and ImgH is half of the diagonal length of the effective pixel region on the imaging surface of the optical imaging lens. Satisfying 3 < f / (TTL - ImgH) < 6 can control the effective focal length of the lens within a reasonable range, and at the same time, reasonably control the total length and imaging range of the optical imaging lens.

[0045] In an exemplary embodiment, the optical imaging lens according to the present application may satisfy: 1.5 < f / (EPD × tan(Semi - FOV)) < 2, where f is the effective focal length of the optical imaging lens, EPD is the entrance pupil diameter of the optical imaging lens, and Semi - FOV is the maximum half - field - of - view angle of the optical imaging lens. Satisfying 1.5 < f / (EPD × tan(Semi - FOV)) < 2 and reasonably controlling the range of this expression can keep the effective focal length of the lens within a reasonable range, ensure the range of the maximum field - of - view angle, and at the same time ensure that the optical imaging lens has a sufficient entrance pupil to capture more detailed information of the scene.

[0046] In an exemplary embodiment, the optical imaging lens further includes a diaphragm. The diaphragm is disposed on the object side of the first lens or between the first lens and the second lens. The optical imaging lens according to the present application may satisfy: 3 < EPD / (TTL - SL) < 6, where EPD is the entrance pupil diameter of the optical imaging lens, TTL is the on - axis distance from the object side of the first lens to the imaging surface of the optical imaging lens, and SL is the on - axis distance from the diaphragm to the imaging surface of the optical imaging lens. Satisfying 3 < EPD / (TTL - SL) < 6 is beneficial to improving the exposure amount of the optical imaging lens, enhancing the photographing ability of the optical imaging lens in low light. In addition, while ensuring the total length of the lens, reasonably controlling the distance from the diaphragm to the imaging surface can effectively control the vignetting value of the optical imaging lens, intercept part of the light with poor imaging quality, thereby improving the resolution and relative illumination of the entire optical imaging lens.

[0047] In an exemplary embodiment, the optical imaging lens according to the present application may satisfy: - 2 < f6 / f7 < 0, where f6 is the effective focal length of the sixth lens and f7 is the effective focal length of the seventh lens. Satisfying - 2 < f6 / f7 < 0 and reasonably controlling the ratio of this expression can control the effective focal lengths of the sixth lens and the seventh lens within a reasonable range, effectively reduce the influence of temperature drift on the focal length, facilitate the processing and molding of the sixth lens and the seventh lens. In addition, the present application reasonably distributes the focal length values of each lens to avoid excessive concentration of the optical power, resulting in too high optical sensitivity of a certain lens, otherwise it is not easy to adjust the field curvature through the sixth lens and the seventh lens.

[0048] In an exemplary embodiment, the optical imaging lens according to the present application may satisfy: 0.5 ≤ f1 / (R2 - R1) < 1, where f1 is the effective focal length of the first lens, R1 is the curvature radius of the object side surface of the first lens, and R2 is the curvature radius of the image side surface of the first lens. Satisfying 0.5 ≤ f1 / (R2 - R1) < 1 and reasonably controlling the ratio of the effective focal length and the curvature radius of the first lens can effectively reduce the sensitivity of the first lens, control the curvature radius of the first lens within a reasonable range, which is beneficial to the processing and forming of the first lens, convenient for later assembly, and improve the performance.

[0049] In an exemplary embodiment, the optical imaging lens according to the present application may satisfy: 1 < SAG11 / SAG22 < 4, where SAG11 is the axial distance between the intersection of the object side surface of the first lens and the optical axis and the vertex of the effective radius of the object side surface of the first lens, and SAG22 is the axial distance between the intersection of the image side surface of the second lens and the optical axis and the vertex of the effective radius of the image side surface of the second lens. Satisfying 1 < SAG11 / SAG22 < 4 and reasonably controlling the sagittal height ratio of the first lens and the second lens can effectively avoid the excessive sagittal height of the two lenses, which may lead to too large lens curvature, ensure the uniformity of the system size, facilitate subsequent lens processing, coating, assembly and other processes, and by restricting the sagittal height ratio, some stray light ghosts can also be eliminated, improving the performance of the optical imaging lens.

[0050] In an exemplary embodiment, the optical imaging lens according to the present application may satisfy: 0 < (SAG41 + SAG42) / (SAG51 + SAG52) < 1.5, where SAG41 is the axial distance between the intersection of the object side surface of the fourth lens and the optical axis and the vertex of the effective radius of the object side surface of the fourth lens, SAG42 is the axial distance between the intersection of the image side surface of the fourth lens and the optical axis and the vertex of the effective radius of the image side surface of the fourth lens, SAG51 is the axial distance between the intersection of the object side surface of the fifth lens and the optical axis and the vertex of the effective radius of the object side surface of the fifth lens, and SAG52 is the axial distance between the intersection of the image side surface of the fifth lens and the optical axis and the vertex of the effective radius of the image side surface of the fifth lens. Satisfying 0 < (SAG41 + SAG42) / (SAG51 + SAG52) < 1.5 and reasonably controlling the value range of this expression can effectively avoid the excessive sagittal height of the fourth lens and the fifth lens, thus avoiding the increase in the difficulty of lens processing and forming; reasonably controlling the lens sagittal height is beneficial to eliminating the influence of stray light ghosts on the optical imaging lens, thereby improving the imaging quality of the optical imaging lens.

[0051] In an exemplary embodiment, the optical imaging lens according to the present application can satisfy: 0.5 < (T45 + T56) / T67 < 1, where T45 is the air gap between the fourth lens and the fifth lens on the optical axis, T56 is the air gap between the fifth lens and the sixth lens on the optical axis, and T67 is the air gap between the sixth lens and the seventh lens on the optical axis. Satisfying 0.5 < (T45 + T56) / T67 < 1 and reasonably controlling the value range of this expression can ensure the rationality of the air gap distribution of each lens, reduce the sensitivity of the air gap of the last few lenses, and is beneficial to the design and processing of the mechanism.

[0052] In an exemplary embodiment, the optical imaging lens according to the present application can satisfy: 1.2 < CTave / CT4 < 1.5, where CTave is the average value of the central thicknesses of the first lens to the seventh lens on the optical axis, and CT4 is the central thickness of the fourth lens on the optical axis. Satisfying 1.2 < CTave / CT4 < 1.5 and reasonably controlling the ratio of this expression can effectively reduce the ghost image risk of the fourth lens. Moreover, since the fourth lens is located at the center of the seven-piece large image plane lens, the distortion of the system can be better balanced through the fourth lens, and there is a larger molding and debugging space.

[0053] In an exemplary embodiment, the optical imaging lens according to the present application can satisfy: 0.8 < ATmax / BFL < 1.3, where ATmax is the maximum value of the air gaps between any two adjacent lenses among the first lens to the seventh lens on the optical axis, and BFL is the axial distance from the image side of the seventh lens to the imaging plane of the optical imaging lens. Satisfying 0.8 < ATmax / BFL < 1.3 and reasonably controlling the ratio of this expression ensures the effective value range of the lens interval and the back focal length, can effectively reduce the influence of temperature drift on the lens, and is convenient for the design of the structural dimensions.

[0054] In an exemplary embodiment, the number V50 of lenses with an Abbe number greater than 50 among the first lens to the seventh lens of the optical imaging lens according to the present application satisfies: 3 ≤ V50 ≤ 5. Reasonably controlling the number of lenses with an Abbe number greater than 50 can effectively balance the use of high and low refractive index materials for each lens, can effectively weaken the influence of chromatic aberration, and is beneficial to the convergence of light. Lenses with a high Abbe number have a smaller dispersion ability. By reasonably matching the materials of each lens, the chromatic aberration of the system can be better corrected, and the resolution can be improved.

[0055] In an exemplary embodiment, the optical imaging lens according to the present application can satisfy: 0.9 < (DT71 - DT11) / (ImgH - EPD) < 1.2, where ImgH is half of the diagonal length of the effective pixel region on the imaging surface of the optical imaging lens, EPD is the entrance pupil diameter of the optical imaging lens, DT11 is the effective radius of the object side surface of the first lens, and DT71 is the effective radius of the object side surface of the seventh lens. Satisfying 0.9 < (DT71 - DT11) / (ImgH - EPD) < 1.2, reasonably controlling the ratio of this expression effectively limits the size of the optical imaging lens, which is beneficial to the miniaturization of the lens size and convenient for the design and installation of electronic products such as mobile phones.

[0056] In an exemplary embodiment, the optical imaging lens according to the present application can satisfy: 3 < ImgH / DT11 < 5, where ImgH is half of the diagonal length of the effective pixel region on the imaging surface of the optical imaging lens, and DT11 is the effective radius of the object side surface of the first lens. Satisfying 3 < ImgH / DT11 < 5, reasonably controlling the value range of this expression can ensure that the optical imaging lens has the relevant characteristics of a large image surface lens. If the ratio of this expression is too large, it is likely to become a small-headed wide-angle lens, and if the ratio is too small, it may become a portrait lens.

[0057] In an exemplary embodiment, at least one of the lens surfaces of each lens from the first lens to the seventh lens is an aspherical lens surface. The present application does not specifically limit the specific number of spherical lenses and aspherical lenses. If the resolution quality is the key concern, aspherical lenses can be used for all lenses. The characteristics of an aspherical lens are that the curvature changes continuously from the center of the lens to the periphery of the lens. The characteristics of a spherical lens are that it has a constant curvature from the center to the periphery. Aspherical lenses have better curvature radius characteristics and have the advantages of improving distortion aberration and astigmatism aberration. After using aspherical lenses, it is possible to eliminate the aberration that appears during imaging as much as possible, thereby improving the imaging quality. Optionally, the object side surface and the image side surface of each lens from the first lens to the seventh lens are both aspherical lens surfaces.

[0058] In an exemplary embodiment, the effective focal length f of the optical imaging lens may be, for example, in the range of 5.0 mm to 6.5 mm, the effective focal length f1 of the first lens may be, for example, in the range of 5.0 mm to 7.0 mm, the effective focal length f2 of the second lens may be, for example, in the range of -16.0 mm to -11.0 mm, the effective focal length f3 of the third lens may be, for example, in the range of 17.0 mm to 50.0 mm, the effective focal length f4 of the fourth lens may be, for example, in the range of -102.0 mm to -21.0 mm, the effective focal length f5 of the fifth lens may be, for example, in the range of -104.0 mm to 345.0 mm, the effective focal length f6 of the sixth lens may be, for example, in the range of 3.0 mm to 8.0 mm, and the effective focal length f7 of the seventh lens may be, for example, in the range of -7.0 mm to -3.5 mm. The distance TTL from the object side surface of the first lens to the imaging surface of the optical imaging lens on the optical axis may satisfy 6.0 mm < TTL < 8.5 mm. The entrance pupil diameter EPD of the optical imaging lens may satisfy: 2.5 mm < EPD < 3.5 mm. The maximum semi-field angle Semi-FOV of the optical imaging lens may be, for example, in the range of 41.0° to 45.0°. Half of the image height ImgH corresponding to the maximum field angle of the optical imaging lens may be, for example, in the range of 5.0 mm to 6.5 mm.

[0059] In an exemplary embodiment, the optical imaging lens according to the present application further includes a filter for correcting color deviation and / or a protective glass for protecting the photosensitive element located on the imaging surface.

[0060] The present application provides an optical imaging lens having characteristics such as a large image plane, high pixels, miniaturization, and high imaging quality. The optical imaging lens according to the above-described embodiment of the present application may employ multiple lenses, for example, seven lenses as described above. By reasonably distributing the optical power, surface shape, central thickness of each lens, and the axial spacing between each lens, etc., the incident light can be effectively converged, the overall optical length of the optical imaging lens can be reduced, and the processability of the optical imaging lens can be improved, making the optical imaging lens more conducive to production and processing. However, those skilled in the art should understand that without departing from the technical solution claimed in the present application, the number of lenses constituting the optical imaging lens can be changed to obtain the various results and advantages described in this specification. For example, although seven lenses are described as an example in the embodiment, the optical imaging lens is not limited to including seven lenses. If necessary, the optical imaging lens may further include other numbers of lenses.

[0061] The following further describes specific embodiments of the optical imaging lens applicable to the above-described embodiments with reference to the accompanying drawings.

[0062] Example 1

[0063] The following reference Figures 1 to 2D An optical imaging lens according to Embodiment 1 of the present application is described. Figure 1 A schematic structural diagram of an optical imaging lens according to Embodiment 1 of the present application is shown.

[0064] like Figure 1 As shown, the optical imaging lens includes, from the object side to the image side, an 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, a filter E8 and an imaging surface S17.

[0065] The first lens E1 has positive power, and its object side surface S1 is convex, and its image side surface S2 is concave. The second lens E2 has negative power, and its object side surface S3 is convex, and its image side surface S4 is concave. The third lens E3 has positive power, and its object side surface S5 is convex, and its image side surface S6 is concave. The fourth lens E4 has negative power, and its object side surface S7 is convex, and its image side surface S8 is concave. The fifth lens E5 has negative power, and its object side surface S9 is convex, and its image side surface S10 is concave. The sixth lens E6 has positive power, and its object side surface S11 is convex, and its image side surface S12 is concave. The seventh lens E7 has negative power, and its object side surface S13 is concave, and its image side surface S14 is concave. The filter E8 has an object side surface S15 and an image side surface S16. The light from the object passes through each surface S1 to S16 in sequence and is finally imaged on the imaging surface S17.

[0066] Table 1 shows the basic parameters of the optical imaging lens of Example 1, wherein the units of the radius of curvature, thickness / distance, effective radius and effective focal length are all millimeters (mm).

[0067]

[0068] Table 1

[0069] 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, and the surface shape x of each aspherical lens can be defined by but not limited to the following aspherical surface formula:

[0070]

[0071] Wherein, x is the distance vector height from the vertex of the aspheric surface when the aspheric surface is 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 cone coefficient; Ai is the correction coefficient of the i-th order of the aspheric surface. 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, A 10 , A12 , A 14 , A 16 , A 18 , A 20 , A 22 , A 24 , A 26 , A 28 and A 30 .

[0072] Face number A4 A6 A8 A10 A12 A14 A16 S1 -1.2224E-03 3.0144E-02 -1.4869E-01 4.6217E-01 -9.4084E-01 1.2990E+00 -1.2391E+00 S2 -9.3045E-03 -2.8523E-02 1.9170E-01 -7.2453E-01 1.8111E+00 -3.1308E+00 3.8379E+00 S3 -2.7417E-02 5.2636E-02 -2.5994E-01 1.0455E+00 -2.8000E+00 5.2061E+00 -6.9087E+00 S4 -7.6343E-03 -2.9527E-02 3.0907E-01 -1.3537E+00 3.8855E+00 -7.6867E+00 1.0777E+01 S5 -2.4624E-02 6.2558E-02 -3.9014E-01 1.4558E+00 -3.6545E+00 6.4049E+00 -8.0348E+00 S6 -1.6118E-02 -2.5699E-02 1.1616E-01 -3.5528E-01 7.1887E-01 -1.0120E+00 1.0153E+00 S7 -3.7786E-02 6.5717E-03 -3.0031E-02 5.6407E-02 -6.2128E-02 4.4514E-02 -2.0141E-02 S8 -3.9011E-02 2.4014E-02 -7.9025E-02 1.4286E-01 -1.6877E-01 1.3889E-01 -8.1270E-02 S9 -2.5631E-02 4.5249E-02 -3.9421E-02 2.1839E-02 -8.5247E-03 2.4208E-03 -5.1331E-04 S10 -1.2266E-01 9.8109E-02 -5.6467E-02 2.2301E-02 -5.8992E-03 9.6257E-04 -6.6645E-05 S11 -6.8135E-02 2.2997E-02 -2.9488E-03 -3.3804E-03 2.2119E-03 -6.9185E-04 1.3717E-04 S12 1.6972E-02 -2.4667E-02 1.9015E-02 -1.0494E-02 3.7103E-03 -8.6832E-04 1.4108E-04 S13 -1.3117E-01 6.2864E-02 -2.2441E-02 5.8518E-03 -1.0026E-03 1.0842E-04 -6.7469E-06 S14 -1.2101E-01 6.7468E-02 -2.7948E-02 8.2168E-03 -1.6892E-03 2.4675E-04 -2.6093E-05

[0073] Table 2-1

[0074] Face number A18 A20 A22 A24 A26 A28 A30 S1 8.1882E-01 -3.6859E-01 1.0749E-01 -1.7658E-02 7.6541E-04 2.1463E-04 -2.6646E-05 S2 -3.3808E+00 2.1454E+00 -9.7163E-01 3.0620E-01 -6.3773E-02 7.8894E-03 -4.3892E-04 S3 6.6282E+00 -4.6023E+00 2.2876E+00 -7.9260E-01 1.8162E-01 -2.4715E-02 1.5114E-03 S4 -1.0863E+01 7.8926E+00 -4.0933E+00 1.4768E+00 -3.5181E-01 4.9715E-02 -3.1536E-03 S5 7.3051E+00 -4.8211E+00 2.2862E+00 -7.5898E-01 1.6745E-01 -2.2058E-02 1.3134E-03 S6 -7.3505E-01 3.8461E-01 -1.4396E-01 3.7548E-02 -6.4771E-03 6.6372E-04 -3.0567E-05 S7 4.3143E-03 9.0563E-04 -1.0070E-03 3.4611E-04 -6.3582E-05 6.2387E-06 -2.5763E-07 S8 3.4042E-02 -1.0175E-02 2.1433E-03 -3.0996E-04 2.9255E-05 -1.6219E-06 4.0050E-08 S9 8.2533E-05 -1.0058E-05 9.1285E-07 -5.9512E-08 2.6179E-09 -6.9185E-11 8.2590E-13 S10 -8.3020E-06 2.8098E-06 -3.6540E-07 2.7856E-08 -1.2943E-09 3.4066E-11 -3.9076E-13 S11 -1.8663E-05 1.7942E-06 -1.2234E-07 5.8113E-09 -1.8333E-10 3.4586E-12 -2.9556E-14 S12 -1.6402E-05 1.3800E-06 -8.3536E-08 3.5486E-09 -1.0035E-10 1.6949E-12 -1.2918E-14 S13 1.2097E-07 1.7240E-08 -1.7359E-09 8.0851E-11 -2.1704E-12 3.2374E-14 -2.0900E-16 S14 2.0191E-06 -1.1441E-07 4.6951E-09 -1.3587E-10 2.6305E-12 -3.0590E-14 1.6165E-16

[0075] Table 2-2

[0076] Table 3 gives the values ​​of some basic parameters of the optical imaging lens in Example 1.

[0077]

[0078]

[0079] Table 3

[0080] Figure 2A The axial chromatic aberration curve of the optical imaging lens of Example 1 is shown, which indicates the deviation of light of different wavelengths from the focal point behind the lens. Figure 2B The astigmatism curve of the optical imaging lens of Example 1 is shown, which represents the meridional image curvature and the sagittal image curvature. Figure 2C The distortion curve of the optical imaging lens of Example 1 is shown, which represents the distortion magnitude values ​​corresponding to different field angles. Figure 2D The magnification chromatic aberration curve of the optical imaging lens of Example 1 is shown, which represents the deviation of different image heights on the imaging surface after the light passes through the lens. FIG. 2A to FIG. 2D It can be seen that the optical imaging lens provided in Example 1 can achieve good imaging quality.

[0081] Example 2

[0082] The following reference Figures 3 to 4D The optical imaging lens according to Embodiment 2 of the present application is described. In this embodiment and the following embodiments, for the sake of brevity, some descriptions similar to Embodiment 1 will be omitted. Figure 3 A schematic structural diagram of an optical imaging lens according to Embodiment 2 of the present application is shown.

[0083] like Figure 3As shown, the optical imaging lens includes, from the object side to the image side, an 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, a filter E8 and an imaging surface S17.

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

[0085] Table 4 shows the basic parameters of the optical imaging lens of Example 2, wherein the units of the radius of curvature, thickness / distance, effective radius and effective focal length are all in millimeters (mm). Tables 5-1 and 5-2 show the high-order coefficients of each aspherical mirror surface that can be used in Example 2, wherein the surface type of each aspherical surface can be defined by the formula (1) given in the above Example 1.

[0086]

[0087]

[0088] Table 4

[0089] Face number A4 A6 A8 A10 A12 A14 A16 S1 9.3071E-04 1.3110E-02 -6.9021E-02 2.4105E-01 -5.6628E-01 9.2771E-01 -1.0840E+00 S2 -1.1537E-02 1.4628E-03 -3.3878E-03 7.1333E-02 -3.2714E-01 8.0824E-01 -1.2736E+00 S3 -2.4733E-02 1.9332E-02 -1.1501E-02 -6.3813E-02 4.3968E-01 -1.2925E+00 2.2963E+00 S4 -8.8095E-03 -1.0408E-02 2.0192E-01 -1.0025E+00 3.2020E+00 -7.0055E+00 1.0839E+01 S5 -2.5407E-02 5.3921E-02 -3.6545E-01 1.4526E+00 -3.8700E+00 7.1727E+00 -9.4820E+00 S6 -2.0000E-02 -1.3830E-02 5.2984E-02 -1.5302E-01 2.9901E-01 -4.1702E-01 4.2326E-01 S7 -3.7843E-02 -1.2171E-02 2.9498E-02 -4.7642E-02 5.5670E-02 -4.5545E-02 2.6417E-02 S8 -3.7965E-02 -3.8421E-03 5.3493E-04 1.3378E-02 -2.8312E-02 3.2200E-02 -2.3290E-02 S9 -1.6469E-02 1.4184E-02 -1.5001E-03 -5.4365E-03 4.5718E-03 -2.0056E-03 5.6523E-04 S10 -8.9063E-02 3.3485E-02 6.2910E-04 -9.2771E-03 6.0271E-03 -2.2310E-03 5.4940E-04 S11 -2.6303E-02 -1.1433E-02 1.4080E-02 -8.4543E-03 3.0632E-03 -7.2745E-04 1.1902E-04 S12 3.9663E-02 -2.4022E-02 1.0956E-02 -4.2629E-03 1.1977E-03 -2.2698E-04 2.8788E-05 S13 -7.5219E-02 2.7634E-02 -5.9898E-03 1.0770E-03 -1.9008E-04 3.3501E-05 -5.0017E-06 S14 -8.1454E-02 3.6928E-02 -1.3158E-02 3.7041E-03 -7.9241E-04 1.2575E-04 -1.4684E-05

[0090] Table 5-1

[0091]

[0092]

[0093] Table 5-2

[0094] Table 6 gives the values ​​of some basic parameters of the optical imaging lens in Example 2.

[0095] parameter Numeric f(mm) 6.21 EPD(mm) 2.96 ImgH(mm) 5.92 Semi-FOV(°) 43.01 TTL(mm) 7.35 SAG11(mm) 0.52 SAG22(mm) 0.23 SAG41(mm) -0.28 SAG42(mm) -0.24 SAG51(mm) -0.28 SAG52(mm) -0.40

[0096] Table 6

[0097] Figure 4AThe axial chromatic aberration curve of the optical imaging lens of Example 2 is shown, which indicates that light of different wavelengths deviates from the focal point behind the lens. Figure 4B The astigmatism curve of the optical imaging lens of Example 2 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 2 is shown, which represents the distortion magnitude values ​​corresponding to different field angles. Figure 4D The magnification chromatic aberration curve of the optical imaging lens of Example 2 is shown, which represents the deviation of different image heights on the imaging surface after the light passes through the lens. FIG. 4A to FIG. 4D It can be seen that the optical imaging lens provided in Example 2 can achieve good imaging quality.

[0098] Example 3

[0099] The following reference Figures 5 to 6D An optical imaging lens according to Embodiment 3 of the present application is described. Figure 5 A schematic structural diagram of an optical imaging lens according to Embodiment 3 of the present application is shown.

[0100] like Figure 5 As shown, the optical imaging lens includes, from the object side to the image side, an 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, a filter E8 and an imaging surface S17.

[0101] The first lens E1 has positive power, and its object side surface S1 is convex, and its image side surface S2 is concave. The second lens E2 has negative power, and its object side surface S3 is convex, and its image side surface S4 is concave. The third lens E3 has positive power, and its object side surface S5 is convex, and its image side surface S6 is convex. The fourth lens E4 has negative power, and its object side surface S7 is convex, and its image side surface S8 is concave. The fifth lens E5 has negative power, and its object side surface S9 is convex, and its image side surface S10 is concave. The sixth lens E6 has positive power, and its object side surface S11 is convex, and its image side surface S12 is convex. The seventh lens E7 has negative power, and its object side surface S13 is concave, and its image side surface S14 is concave. The filter E8 has an object side surface S15 and an image side surface S16. The light from the object passes through each surface S1 to S16 in sequence and is finally imaged on the imaging surface S17.

[0102] Table 7 shows the basic parameters of the optical imaging lens of Example 3, wherein the units of the radius of curvature, thickness / distance, effective radius and effective focal length are all in millimeters (mm). Tables 8-1 and 8-2 show the high-order coefficients of each aspherical mirror surface that can be used in Example 3, wherein the surface type of each aspherical surface can be defined by the formula (1) given in the above Example 1.

[0103]

[0104] Table 7

[0105] Face number A4 A6 A8 A10 A12 A14 A16 S1 3.1837E-03 -1.5548E-02 9.0212E-02 -3.0314E-01 6.7960E-01 -1.0708E+00 1.2178E+00 S2 -1.8164E-02 5.2783E-02 -2.9448E-01 1.0840E+00 -2.6385E+00 4.4442E+00 -5.3346E+00 S3 -2.3986E-02 -4.4211E-02 4.0561E-01 -1.6549E+00 4.4163E+00 -8.1189E+00 1.0569E+01 S4 -2.0355E-02 9.0316E-02 -4.7124E-01 1.8666E+00 -4.9323E+00 9.0146E+00 -1.1672E+01 S5 -1.7156E-02 -4.6964E-02 3.0843E-01 -1.2903E+00 3.5517E+00 -6.7926E+00 9.2803E+00 S6 -2.0375E-02 -1.4905E-02 5.5924E-02 -1.4715E-01 2.6413E-01 -3.4488E-01 3.3339E-01 S7 -3.3245E-02 -4.1697E-02 1.1190E-01 -1.9619E-01 2.4221E-01 -2.1322E-01 1.3596E-01 S8 -3.4426E-02 -2.1386E-02 3.2556E-02 -2.4287E-02 1.9921E-03 1.5527E-02 -1.7159E-02 S9 2.0365E-03 -1.6849E-02 3.0393E-02 -2.7050E-02 1.4555E-02 -5.2303E-03 1.3074E-03 S10 -6.0917E-02 -8.0782E-03 3.8323E-02 -3.1024E-02 1.4406E-02 -4.4621E-03 9.6890E-04 S11 -1.7727E-02 -2.2441E-02 2.0613E-02 -1.0067E-02 2.9971E-03 -5.8009E-04 7.5508E-05 S12 3.9560E-02 -2.5260E-02 1.2559E-02 -4.9347E-03 1.3213E-03 -2.3434E-04 2.7799E-05 S13 -1.1676E-01 6.9721E-02 -2.8077E-02 8.1140E-03 -1.6574E-03 2.4357E-04 -2.6260E-05 S14 -1.2115E-01 7.5158E-02 -3.2162E-02 9.6346E-03 -2.0505E-03 3.1450E-04 -3.5115E-05

[0106] Table 8-1

[0107]

[0108]

[0109] Table 8-2

[0110] Table 9 gives the values ​​of some basic parameters of the optical imaging lens in Example 3.

[0111] parameter Numeric f(mm) 5.89 EPD(mm) 3.07 ImgH(mm) 5.92 Semi-FOV(°) 44.54 TTL(mm) 7.00 SAG11(mm) 0.57 SAG22(mm) 0.24 SAG41(mm) -0.26 SAG42(mm) -0.22 SAG51(mm) -0.27 SAG52(mm) -0.40

[0112] Table 9

[0113] Fig. 6A The axial chromatic aberration curve of the optical imaging lens of Example 3 is shown, which indicates the deviation of light of different wavelengths from the focal point behind the lens. Figure 6B The astigmatism curve of the optical imaging lens of Example 3 is shown, which represents the meridional image curvature and the sagittal image curvature. Figure 6C The distortion curve of the optical imaging lens of Example 3 is shown, which represents the distortion magnitude values ​​corresponding to different field angles. Fig.6D The magnification chromatic aberration curve of the optical imaging lens of Example 3 is shown, which represents the deviation of different image heights on the imaging surface after the light passes through the lens. FIG. 6A to FIG. 6D It can be seen that the optical imaging lens provided in Example 3 can achieve good imaging quality.

[0114] Example 4

[0115] The following reference Figures 7 to 8D An optical imaging lens according to Embodiment 4 of the present application is described. Figure 7 A schematic structural diagram of an optical imaging lens according to Embodiment 4 of the present application is shown.

[0116] like Figure 7 As shown, the optical imaging lens includes, from the object side to the image side, an 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, a filter E8 and an imaging surface S17.

[0117] The first lens E1 has positive power, and its object side surface S1 is convex, and its image side surface S2 is concave. The second lens E2 has negative power, and its object side surface S3 is convex, and its image side surface S4 is concave. The third lens E3 has positive power, and its object side surface S5 is convex, and its image side surface S6 is concave. The fourth lens E4 has negative power, and its object side surface S7 is concave, and its image side surface S8 is concave. The fifth lens E5 has positive power, and its object side surface S9 is convex, and its image side surface S10 is concave. The sixth lens E6 has positive power, and its object side surface S11 is convex, and its image side surface S12 is concave. The seventh lens E7 has negative power, and its object side surface S13 is convex, and its image side surface S14 is concave. The filter E8 has an object side surface S15 and an image side surface S16. The light from the object passes through each surface S1 to S16 in sequence and is finally imaged on the imaging surface S17.

[0118] Table 10 shows the basic parameters of the optical imaging lens of Example 4, wherein the units of the radius of curvature, thickness / distance, effective radius and effective focal length are all in millimeters (mm). Tables 11-1 and 11-2 show the high-order coefficients of each aspherical mirror surface that can be used in Example 4, wherein the surface type of each aspherical surface can be defined by the formula (1) given in the above Example 1.

[0119]

[0120] Table 10

[0121] Face number A4 A6 A8 A10 A12 A14 A16 S1 -5.8381E-04 9.7851E-03 -4.8413E-02 1.5042E-01 -3.1488E-01 4.5962E-01 -4.7882E-01 S2 -2.5164E-03 -1.0430E-02 7.0822E-02 -2.3344E-01 4.9771E-01 -7.3188E-01 7.6581E-01 S3 -1.2559E-02 1.6813E-02 -5.3323E-02 1.5820E-01 -3.1556E-01 4.3456E-01 -4.2286E-01 S4 -7.2458E-03 -4.2872E-03 5.5757E-02 -2.1558E-01 5.3306E-01 -8.9962E-01 1.0728E+00 S5 5.1550E-04 2.9283E-03 -1.7898E-02 5.0833E-02 -7.9409E-02 4.6617E-02 5.9551E-02 S6 -3.3826E-04 -3.0341E-02 1.6709E-01 -5.9047E-01 1.3925E+00 -2.2963E+00 2.7161E+00 S7 -2.7781E-02 -1.1494E-03 -7.9220E-03 -1.9748E-03 8.8832E-02 -2.8862E-01 5.0158E-01 S8 -2.2287E-02 -4.3191E-03 2.0248E-02 -4.5469E-02 6.4671E-02 -6.3957E-02 4.5539E-02 S9 -2.0217E-02 8.4774E-03 2.2757E-03 -1.0108E-02 1.1368E-02 -7.8614E-03 3.7410E-03 S10 -4.5147E-02 1.1859E-02 3.9675E-03 -1.0251E-02 8.9869E-03 -4.8321E-03 1.7588E-03 S11 -2.4328E-02 7.0264E-03 -2.9509E-03 8.2104E-04 -1.8010E-04 3.4418E-05 -5.3805E-06 S12 2.7693E-03 1.1984E-03 -1.3972E-03 3.1804E-04 -2.8743E-05 -1.7130E-06 1.0911E-06 S13 -8.4305E-02 1.0000E-02 3.6740E-03 -2.3584E-03 6.3239E-04 -1.0236E-04 1.1015E-05 S14 -9.3661E-02 2.4948E-02 -5.8913E-03 1.3242E-03 -2.6980E-04 4.3228E-05 -5.0492E-06

[0122] Table 11-1

[0123]

[0124]

[0125] Table 11-2

[0126] Table 12 gives the values ​​of some basic parameters of the optical imaging lens in Example 4.

[0127] parameter Numeric f(mm) 6.40 EPD(mm) 3.37 ImgH(mm) 6.20 Semi-FOV(°) 43.04 TTL(mm) 8.00 SAG11(mm) 0.57 SAG22(mm) 0.42 SAG41(mm) -0.25 SAG42(mm) -0.17 SAG51(mm) -0.08 SAG52(mm) -0.36

[0128] Table 12

[0129] Fig. 8A The axial chromatic aberration curve of the optical imaging lens of Example 4 is shown, which indicates the deviation of light of different wavelengths from the focal point behind the lens. Figure 8B The astigmatism curve of the optical imaging lens of Example 4 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 4 is shown, which represents the distortion magnitude values ​​corresponding to different field angles. Fig.8DThe magnification chromatic aberration curve of the optical imaging lens of Example 4 is shown, which represents the deviation of different image heights on the imaging surface after the light passes through the lens. FIG. 8A to FIG. 8D It can be seen that the optical imaging lens provided in Example 4 can achieve good imaging quality.

[0130] Example 5

[0131] The following reference Figures 9 to 10D An optical imaging lens according to Embodiment 5 of the present application is described. Fig. 9 A schematic structural diagram of an optical imaging lens according to Embodiment 5 of the present application is shown.

[0132] like Fig. 9 As shown, the optical imaging lens includes, from the object side to the image side, an 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, a filter E8 and an imaging surface S17.

[0133] The first lens E1 has positive power, and its object side surface S1 is convex, and its image side surface S2 is concave. The second lens E2 has negative power, and its object side surface S3 is convex, and its image side surface S4 is concave. The third lens E3 has positive power, and its object side surface S5 is convex, and its image side surface S6 is concave. The fourth lens E4 has negative power, and its object side surface S7 is concave, and its image side surface S8 is convex. The fifth lens E5 has negative power, and its object side surface S9 is convex, and its image side surface S10 is concave. The sixth lens E6 has positive power, and its object side surface S11 is convex, and its image side surface S12 is convex. The seventh lens E7 has negative power, and its object side surface S13 is concave, and its image side surface S14 is concave. The filter E8 has an object side surface S15 and an image side surface S16. The light from the object passes through each surface S1 to S16 in sequence and is finally imaged on the imaging surface S17.

[0134] Table 13 shows the basic parameters of the optical imaging lens of Example 5, wherein the units of the radius of curvature, thickness / distance, effective radius and effective focal length are all in millimeters (mm). Tables 14-1 and 14-2 show the high-order coefficients of each aspherical mirror surface that can be used in Example 5, wherein the surface type of each aspherical surface can be defined by the formula (1) given in the above Example 1.

[0135]

[0136] Table 13

[0137]

[0138]

[0139] Table 14-1

[0140] Face number A18 A20 A22 A24 A26 A28 A30 S1 -2.4716E-01 1.3941E-01 -5.5915E-02 1.5562E-02 -2.8561E-03 3.1078E-04 -1.5183E-05 S2 2.1763E-01 -1.2632E-01 5.1870E-02 -1.4692E-02 2.7246E-03 -2.9707E-04 1.4396E-05 S3 -2.0746E-01 1.8640E-01 -1.1010E-01 4.3065E-02 -1.0768E-02 1.5613E-03 -9.9961E-05 S4 3.4435E+00 -2.5293E+00 1.3248E+00 -4.8222E-01 1.1580E-01 -1.6482E-02 1.0527E-03 S5 2.0885E+00 -1.3149E+00 5.7211E-01 -1.6558E-01 2.9521E-02 -2.7487E-03 8.3025E-05 S6 3.1815E-02 7.0797E-02 -7.4875E-02 3.7903E-02 -1.1101E-02 1.8046E-03 -1.2668E-04 S7 1.6403E+00 -1.0448E+00 4.7645E-01 -1.5138E-01 3.1789E-02 -3.9631E-03 2.2205E-04 S8 -1.2918E-01 7.1974E-02 -2.8184E-02 7.6055E-03 -1.3473E-03 1.4109E-04 -6.6197E-06 S9 -5.1118E-04 1.3075E-04 -2.5542E-05 3.8019E-06 -4.0143E-07 2.6071E-08 -7.6721E-10 S10 2.1855E-04 -7.4985E-05 1.6203E-05 -2.2421E-06 1.9357E-07 -9.5251E-09 2.0448E-10 S11 -1.3373E-05 1.5754E-06 -1.3146E-07 7.5852E-09 -2.8768E-10 6.4506E-12 -6.4778E-14 S12 1.0018E-06 -2.0493E-07 2.1672E-08 -1.4007E-09 5.5711E-11 -1.2577E-12 1.2372E-14 S13 -1.0069E-05 7.6648E-07 -4.1119E-08 1.5084E-09 -3.5682E-11 4.8343E-13 -2.7805E-15 S14 -1.0187E-06 5.7414E-08 -2.3247E-09 6.5941E-11 -1.2443E-12 1.4036E-14 -7.1627E-17

[0141] Table 14-2

[0142] Table 15 gives the values ​​of some basic parameters of the optical imaging lens in Example 5.

[0143] parameter Numeric f(mm) 6.32 EPD(mm) 3.32 ImgH(mm) 5.90 Semi-FOV(°) 41.92 TTL(mm) 7.70 SAG11(mm) 0.58 SAG22(mm) 0.35 SAG41(mm) -0.28 SAG42(mm) -0.42 SAG51(mm) -0.26 SAG52(mm) -0.27

[0144] Table 15

[0145] Fig. 10A The axial chromatic aberration curve of the optical imaging lens of Example 5 is shown, which indicates the deviation of light of different wavelengths from the focal point behind the lens. Fig. 10B The astigmatism curve of the optical imaging lens of Example 5 is shown, which represents the meridional image curvature and the sagittal image curvature. Fig. 10C The distortion curve of the optical imaging lens of Example 5 is shown, which represents the distortion magnitude values ​​corresponding to different field angles. Fig. 10D The magnification chromatic aberration curve of the optical imaging lens of Example 5 is shown, which represents the deviation of different image heights on the imaging surface after the light passes through the lens. FIG. 10A to FIG. 10D It can be seen that the optical imaging lens provided in Example 5 can achieve good imaging quality.

[0146] Example 6

[0147] The following reference Figures 11 to 12D An optical imaging lens according to Embodiment 6 of the present application is described. Fig.11 A schematic structural diagram of an optical imaging lens according to Example 6 of the present application is shown.

[0148] like Fig.11 As shown, the optical imaging lens includes, from the object side to the image side, a first lens E1, an aperture STO, a second lens E2, a third lens E3, a fourth lens E4, a fifth lens E5, a sixth lens E6, a seventh lens E7, a filter E8 and an imaging surface S17.

[0149] The first lens E1 has positive power, and its object side surface S1 is convex, and its image side surface S2 is concave. The second lens E2 has negative power, and its object side surface S3 is convex, and its image side surface S4 is concave. The third lens E3 has positive power, and its object side surface S5 is convex, and its image side surface S6 is convex. The fourth lens E4 has negative power, and its object side surface S7 is convex, and its image side surface S8 is concave. The fifth lens E5 has negative power, and its object side surface S9 is convex, and its image side surface S10 is concave. The sixth lens E6 has positive power, and its object side surface S11 is convex, and its image side surface S12 is concave. The seventh lens E7 has negative power, and its object side surface S13 is concave, and its image side surface S14 is concave. The filter E8 has an object side surface S15 and an image side surface S16. The light from the object passes through each surface S1 to S16 in sequence and is finally imaged on the imaging surface S17.

[0150] Table 16 shows the basic parameters of the optical imaging lens of Example 6, wherein the units of the radius of curvature, thickness / distance, effective radius and effective focal length are all in millimeters (mm). Tables 17-1 and 17-2 show the high-order coefficients of each aspherical mirror surface that can be used in Example 6, wherein the surface type of each aspherical surface can be defined by the formula (1) given in the above Example 1.

[0151]

[0152] Table 16

[0153]

[0154]

[0155] Table 17-1

[0156] Face number A18 A20 A22 A24 A26 A28 A30 S1 1.6468E+01 -1.1353E+01 5.6425E+00 -1.9679E+00 4.5677E-01 -6.3340E-02 3.9688E-03 S2 5.2231E+01 -4.5404E+01 2.8132E+01 -1.2121E+01 3.4502E+00 -5.8314E-01 4.4302E-02 S3 4.3483E+01 -3.9071E+01 2.5017E+01 -1.1127E+01 3.2643E+00 -5.6744E-01 4.4234E-02 S4 1.1796E+02 -1.2191E+02 8.8530E+01 -4.4245E+01 1.4497E+01 -2.8046E+00 2.4295E-01 S5 1.1483E+02 -1.0247E+02 6.5734E+01 -2.9518E+01 8.8028E+00 -1.5657E+00 1.2567E-01 S6 2.0508E+01 -1.8164E+01 1.1735E+01 -5.3575E+00 1.6339E+00 -2.9817E-01 2.4590E-02 S7 1.0135E+02 -8.4355E+01 5.0473E+01 -2.1142E+01 5.8823E+00 -9.7630E-01 7.3131E-02 S8 6.9510E-01 -3.6463E-01 1.3474E-01 -3.3959E-02 5.4933E-03 -5.0518E-04 1.9484E-05 S9 2.1475E-01 -8.6511E-02 2.5207E-02 -5.1513E-03 6.9852E-04 -5.6304E-05 2.0370E-06 S10 3.1442E-03 -5.2969E-04 5.4013E-05 -1.4674E-06 -4.2117E-07 5.8334E-08 -2.5216E-09 S11 4.0499E-04 -5.1977E-05 4.7593E-06 -3.0289E-07 1.2703E-08 -3.1474E-10 3.4782E-12 S12 3.7715E-04 -4.8152E-05 4.4051E-06 -2.8156E-07 1.1934E-08 -3.0118E-10 3.4235E-12 S13 4.0905E-06 -2.8814E-07 1.4735E-08 -5.3323E-10 1.2964E-11 -1.9015E-13 1.2726E-15 S14 3.4991E-06 -2.7579E-07 1.5411E-08 -5.9583E-10 1.5156E-11 -2.2823E-13 1.5415E-15

[0157] Table 17-2

[0158] Table 18 gives the values ​​of some basic parameters of the optical imaging lens in Example 6.

[0159] parameter Numeric f(mm) 5.36 EPD(mm) 2.75 ImgH(mm) 5.22 Semi-FOV(°) 43.12 TTL(mm) 6.48 SAG11(mm) 0.56 SAG22(mm) 0.15 SAG41(mm) -0.32 SAG42(mm) -0.25 SAG51(mm) -0.57 SAG52(mm) -0.74

[0160] Table 18

[0161] Fig. 12A The axial chromatic aberration curve of the optical imaging lens of Example 6 is shown, which indicates the deviation of light of different wavelengths from the focal point behind the lens. Fig. 12B The astigmatism curve of the optical imaging lens of Example 6 is shown, which represents the meridional image curvature and the sagittal image curvature. Fig. 12C The distortion curve of the optical imaging lens of Example 6 is shown, which represents the distortion magnitude values ​​corresponding to different field angles. Fig.12DThe magnification chromatic aberration curve of the optical imaging lens of Example 6 is shown, which represents the deviation of different image heights on the imaging surface after the light passes through the lens. FIG. 12A to FIG. 12D It can be seen that the optical imaging lens provided in Example 6 can achieve good imaging quality.

[0162] In summary, Examples 1 to 6 respectively satisfy the relationships shown in Table 19.

[0163] Conditional / Example 1 2 3 4 5 6 f7 / CT7 -12.42 -11.09 -9.97 -11.83 -8.50 -9.52 f2 / f1+f4 / f3 -4.57 -3.78 -4.80 -3.08 -3.98 -3.93 f / (TTL-ImgH) 4.59 4.34 5.45 3.55 3.51 4.25 f / EPD×tan(Semi-FOV) 1.82 1.96 1.89 1.77 1.71 1.83 EPD / (TTL-SL) 5.47 5.75 5.39 5.92 5.76 3.31 f6 / f7 -1.14 -1.13 -1.27 -1.13 -1.41 -0.88 f1 / (R2-R1) 0.90 0.80 0.95 0.87 0.50 0.78 SAG11 / SAG22 2.37 2.24 2.35 1.36 1.68 3.76 (SAG41+SAG42) / (SAG51+SAG52) 0.76 0.78 0.72 0.98 1.30 0.43 (T45+T56) / T67 0.78 0.85 0.77 0.58 0.87 1.00 CTave / CT4 1.41 1.39 1.40 1.22 1.21 1.47 ATmax / BFL 1.08 0.89 1.05 1.22 1.18 0.92 V50 5 5 5 4 4 3 (DT71-DT11) / (ImgH-EPD) 1.14 1.08 1.11 1.12 0.95 1.13 ImgH / DT11 3.71 4.00 3.86 3.68 3.55 3.63

[0164] Table 19

[0165] The present application also provides an imaging device, whose electronic photosensitive element can be a photosensitive 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 in a mobile electronic device such as a mobile phone. The imaging device is equipped with the optical imaging lens described above.

[0166] The above description is only a preferred embodiment of the present application and an explanation of the technical principles used. Those skilled in the art should understand that the scope of the invention involved in the present application is not limited to the technical solution formed by a specific combination of the above technical features, but 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 above features are replaced with (but not limited to) technical features with similar functions disclosed in the present application.

Claims

1. An optical imaging lens, characterized in that: It sequentially includes from the object side to the image side along the optical axis: A first lens with positive optical power, whose object side is convex and image side is concave; A second lens with negative optical power, whose object side is convex and image side is concave; A third lens with positive optical power, whose object side is convex; A fourth lens with negative optical power; A fifth lens, whose object side is convex and image side is concave; A sixth lens with positive optical power, whose object side is convex; A seventh lens with negative optical power, whose image side is concave; Half of the diagonal length ImgH of the effective pixel area on the imaging surface of the optical imaging lens satisfies: 5mm < ImgH < 7mm; The effective focal length f of the optical imaging lens, the entrance pupil diameter EPD of the optical imaging lens, and the maximum half field of view Semi-FOV of the optical imaging lens satisfy: 1.5 < f / EPD × tan(Semi-FOV) < 2; and The effective focal length f7 of the seventh lens and the central thickness CT7 of the seventh lens on the optical axis satisfy: -13 < f7 / CT7 < -8.

2. The optical imaging lens according to claim 1, wherein: The effective focal length f1 of the first lens, the effective focal length f2 of the second lens, the effective focal length f3 of the third lens, and the effective focal length f4 of the fourth lens satisfy: -5 < f2 / f1 + f4 / f3 < -3.

3. The optical imaging lens according to claim 1, wherein: The effective focal length f of the optical imaging lens, the axial distance TTL from the object side of the first lens to the imaging surface of the optical imaging lens, and half of the diagonal length ImgH of the effective pixel area on the imaging surface of the optical imaging lens satisfy: 3 < f / (TTL - ImgH) < 6.

4. The optical imaging lens according to claim 1, wherein: The optical imaging lens further includes a diaphragm, and the diaphragm is disposed on the object side of the first lens or between the first lens and the second lens; The entrance pupil diameter EPD of the optical imaging lens, the axial distance TTL from the object side of the first lens to the imaging surface of the optical imaging lens, and the axial distance SL from the diaphragm to the imaging surface of the optical imaging lens satisfy: 3 < EPD / (TTL - SL) < 6.

5. The optical imaging lens according to claim 1, wherein: The effective focal length f6 of the sixth lens and the effective focal length f7 of the seventh lens satisfy: -2 < f6 / f7 < 0.

6. The optical imaging lens according to claim 1, wherein: The effective focal length f1 of the first lens, the curvature radius R1 of the object side of the first lens, and the curvature radius R2 of the image side of the first lens satisfy: 0.5 ≤ f1 / (R2 - R1) < 1.

7. The optical imaging lens according to claim 1, wherein: The axial distance SAG11 between the intersection point of the object side of the first lens and the optical axis and the effective radius vertex of the object side of the first lens, and the axial distance SAG22 between the intersection point of the image side of the second lens and the optical axis and the effective radius vertex of the image side of the second lens satisfy: 1 < SAG11 / SAG22 < 4.

8. The optical imaging lens according to claim 1, wherein: An axial distance SAG41 between the intersection of the object side surface of the fourth lens and the optical axis to the effective radius vertex of the object side surface of the fourth lens, an axial distance SAG42 between 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, an axial distance SAG51 between 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, and an axial distance SAG52 between the intersection of the image side surface of the fifth lens and the optical axis to the effective radius vertex of the image side surface of the fifth lens satisfy: 0<(SAG41+SAG42) / (SAG51+SAG52)<1.

5.

9. The optical imaging lens according to any one of claims 1 to 9, wherein: The air interval T45 between the fourth lens and the fifth lens on the optical axis, the air interval T56 between the fifth lens and the sixth lens on the optical axis, and the air interval T56 between the sixth lens and the seventh lens on the optical axis satisfy: 0.5<(T45+T56) / T67<1.

10. The optical imaging lens according to any one of claims 1 to 8, wherein: The average value CTave of the center thickness of the first lens to the seventh lens on the optical axis and the center thickness CT4 of the fourth lens on the optical axis satisfy: 1.2 <CTave / CT4<1.5。

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