Optical imaging lens

Abstract

The present application discloses an optical imaging lens. The optical imaging lens sequentially includes, from the object side to the image side along the optical axis: a 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: 5 mm < ImgH < 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 semi-field angle 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.

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 including imaging accuracy, optical anti-shake, noise processing, and dynamic range. These problems prevent mobile phone photos from achieving the level of DSLR cameras in terms of detail and quality. To address 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, 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 semi-field angle 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 lengths f1 of the first lens, f2 of the second lens, f3 of the third lens, and 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 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.

[0006] In one embodiment, the optical imaging lens further includes an aperture stop, which 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 aperture stop to the imaging surface of the optical imaging lens satisfy: 3 <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: -2 <f6 / f7<0。

[0008] In one embodiment, the effective focal length f1 of the first lens, the radius of curvature R1 of the object side of the first lens, and the radius of curvature R2 of the image side 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 and the vertex of the effective radius 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 and the vertex of the effective radius of the image-side surface of the second lens, satisfy: 1 <SAG11 / SAG22<4。

[0010] In one embodiment, the axial distance SAG41 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, the axial distance SAG42 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, the axial distance SAG51 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 the axial distance SAG52 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 satisfy: 0 < (SAG41 + SAG42) / (SAG51 + SAG52) < 1.5.

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

[0012] In one embodiment, the average center thickness CTave of the first to seventh lenses along the optical axis and the center thickness CT4 of the fourth lens along 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 axial 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 area 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 area 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 - lens optical imaging lens proposed in this application rationally matches the optical power and surface shape of the lenses, and satisfies: 5mm < ImgH < 7mm 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后期成型及组立 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 - restrictive embodiments made with reference to the following drawings:

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

[0020] Figures 2A to 2D FIGS. 2 - 5 respectively show the axial chromatic aberration curve, astigmatism curve, distortion curve, and lateral chromatic aberration curve of the optical imaging lens of Embodiment 1; [[ID=#26]]

[0021] Figure 3 FIG. 6 shows a schematic structural diagram of an optical imaging lens according to Embodiment 2 of this application;

[0022] Figures 4A to 4D FIGS. 7 - 10 respectively show the axial chromatic aberration curve, astigmatism curve, distortion curve, and lateral chromatic aberration curve of the optical imaging lens of Embodiment 2; It should be noted that the part "后期成型及组立" in the original text seems to be an incomplete or incorrect expression. I have translated it as literally as possible. If there is a more accurate expression, it can be adjusted accordingly. Also, for the FIGS. numbers in the original text which seem to be incomplete in the description, I have left them as they are in the translation to maintain consistency with the original.

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

[0024] Figures 6A to 6D The on-axis chromatic aberration curve, astigmatism curve, distortion curve, and magnification chromatic aberration curve of the optical imaging lens of Example 3 are shown respectively.

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

[0026] Figures 8A to 8D The on-axis chromatic aberration curve, astigmatism curve, distortion curve, and magnification chromatic aberration curve of the optical imaging lens of Example 4 are shown respectively.

[0027] Figure 9 A schematic diagram of the structure of an optical imaging lens according to Embodiment 5 of this application is shown;

[0028] Figures 10A to 10D The on-axis chromatic aberration curve, astigmatism curve, distortion curve, and magnification chromatic aberration curve of the optical imaging lens of Example 5 are shown respectively.

[0029] Figure 11 A schematic diagram of the structure of an optical imaging lens according to Embodiment 6 of this application is shown; and

[0030] Figures 12A to 12D The on-axis chromatic aberration curve, astigmatism curve, distortion curve, and magnification chromatic aberration curve of the optical imaging lens of Example 6 are shown respectively. Detailed Implementation

[0031] To better understand this application, various aspects of this application will be described in more detail with reference to the accompanying drawings. It should be understood that these detailed descriptions are merely illustrative of exemplary embodiments of this application and are not intended to limit the scope of this 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 terms "first," "second," "third," etc., are used only to distinguish one feature from another and do not imply any limitation on the features. Therefore, without departing from the teachings of this application, the first lens discussed below may also be referred to as the second lens or the third lens.

[0033] In the accompanying drawings, the thickness, size, and shape of the lenses have been slightly exaggerated for ease of illustration. Specifically, the shapes of the spherical or aspherical surfaces shown in the drawings are illustrated by way of example. That is, the shapes of the spherical or aspherical surfaces are not limited to those shown in the drawings. The drawings are for illustrative purposes only and are not 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 location of the convexity 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 location of the concaveness 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 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.

[0035] It should also be understood that the terms "comprising," "including," "having," "containing," 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. Furthermore, when expressions such as "at least one of..." appear after a list of listed features, they modify the entire list of features, not individual elements in the list. Additionally, when describing embodiments of this application, the word "may" is used to mean "one or more embodiments of this application." And the term "exemplary" is intended to refer to an example or illustration.

[0036] Unless otherwise specified, all terms used herein (including technical and scientific terms) shall have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains. It should also be understood that terms (e.g., those defined in common dictionaries) shall be interpreted as having the meaning consistent with their meaning in the context of the relevant art and shall not be interpreted in an idealized or overly formalized sense, unless expressly so specified herein.

[0037] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other. This application will now be described in detail with reference to the accompanying drawings and embodiments.

[0038] The features, principles and other aspects of this 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 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 its central thickness CT7 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 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. <着

[0042] In an exemplary embodiment, the optical imaging lens according to an exemplary embodiment of the present application further includes an aperture, and the aperture can be set at an appropriate position as needed. Exemplarily, the aperture 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 satisfies: - 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 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 can satisfy: 3 < f / (TTL - ImgH) < 6, where f is the effective focal length of the optical imaging lens, TTL is the axial 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 area 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 can 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 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 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 an aperture. The aperture 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 can satisfy: 3 < EPD / (TTL - SL) < 6, where EPD is the entrance pupil diameter of the optical imaging lens, TTL is the axial distance from the object side of the first lens to the imaging surface of the optical imaging lens, and SL is the axial distance from the aperture to the imaging surface of the optical imaging lens. Satisfying 3 < EPD / (TTL - SL) < 6 is beneficial to increasing the exposure amount of the optical imaging lens, enhancing the photographing ability of the optical imaging lens in low - light conditions. Additionally, while ensuring the total length of the lens, reasonably controlling the distance from the aperture 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 can 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 shaping of the sixth lens and the seventh lens. Additionally, 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 radius of curvature of the object side surface of the first lens, and R2 is the radius of curvature 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 radius of curvature of the first lens can effectively reduce the sensitivity of the first lens, control the radius of curvature of the first lens within a reasonable range, which is beneficial to the processing and forming of the first lens, convenient for subsequent 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 ratio of the sag heights of the first lens and the second lens can effectively avoid excessive sag heights of the two lenses, resulting in too large lens curvatures, ensure the uniformity of the system size, facilitate subsequent processes such as lens processing, coating, and assembly, and by limiting the ratio of the sag heights, 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 excessive sag heights of the fourth lens and the fifth lens, thus avoiding an increase in the difficulty of lens processing and forming; reasonably controlling the sag height of the lens 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 gaps 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 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 shaping 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 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 air gap 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 light convergence. 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 area 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 area 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. An aspherical lens has better curvature radius characteristics and has the advantages of improving distortion aberration and astigmatism aberration. After using an aspherical lens, it is possible to eliminate the aberration that appears during imaging as much as possible, thereby improving the imaging quality. Optionally, 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 can be, for example, in the range of 5.0 mm to 6.5 mm, the effective focal length f1 of the first lens can be, for example, in the range of 5.0 mm to 7.0 mm, the effective focal length f2 of the second lens can be, for example, in the range of -16.0 mm to -11.0 mm, the effective focal length f3 of the third lens can be, for example, in the range of 17.0 mm to 50.0 mm, the effective focal length f4 of the fourth lens can be, for example, in the range of -102.0 mm to -21.0 mm, the effective focal length f5 of the fifth lens can be, for example, in the range of -104.0 mm to 345.0 mm, the effective focal length f6 of the sixth lens can be, for example, in the range of 3.0 mm to 8.0 mm, and the effective focal length f7 of the seventh lens can be, for example, in the range of -7.0 mm to -3.5 mm. The distance TTL from the object side of the first lens to the imaging surface of the optical imaging lens on the optical axis can satisfy 6.0 mm < TTL < 8.5 mm. The entrance pupil diameter EPD of the optical imaging lens can satisfy: 2.5 mm < EPD < 3.5 mm. The maximum semi-field angle Semi-FOV of the optical imaging lens can 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 can 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 embodiments of the present application can employ multiple lenses, such as the seven lenses mentioned 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 solutions 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 can further include other numbers of lenses.

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

[0062] Example 1

[0063] The following is for reference Figures 1 to 2D Describes an optical imaging lens according to Embodiment 1 of this application. Figure 1 A schematic diagram of the structure of an optical imaging lens according to Embodiment 1 of this application is shown.

[0064] like Figure 1 As shown, the optical imaging lens includes, from the object side to the image side, an aperture stop 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 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 positive optical power, with its object-side surface S5 being convex and its image-side surface S6 being concave. The fourth lens E4 has negative optical power, with its object-side surface S7 being convex and its image-side surface S8 being concave. The fifth lens E5 has negative optical power, with its object-side surface S9 being convex 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 concave and its image-side surface S14 being concave. The filter E8 has an object-side surface S15 and an image-side surface S16. Light from the object passes sequentially through surfaces S1 to S16 and is finally imaged on the imaging surface S17.

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

[0067]

[0068] Table 1

[0069] In Embodiment 1, the object-side surface and image-side surface of any one of the first lens E1 to the seventh lens E7 are aspherical surfaces, and the surface shape x of each aspherical lens can be defined using, but is not limited to, the following aspherical formula:

[0070]

[0071] Where x is the distance vector from the vertex of the aspherical surface at a height h along the optical axis; c is the paraxial curvature of the aspherical surface, c = 1 / R (i.e., the paraxial curvature c is the reciprocal of the radius of curvature R in Table 1 above); k is the conic coefficient; Ai is the i-th order correction coefficient of the aspherical surface. Tables 2-1 and 2-2 give the higher-order coefficients A4, A6, A8, A14 that can be used for each aspherical mirror S1-S14 in Example 1. 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 provides the values ​​of some basic parameters of the optical imaging lens in Example 1.

[0077]

[0078]

[0079] Table 3

[0080] Figure 2A The on-axis chromatic aberration curve of the optical imaging lens of Embodiment 1 is shown, which represents the deviation of the focal point of light of different wavelengths after passing through the lens. Figure 2B The astigmatism curve of the optical imaging lens of Embodiment 1 is shown, which represents the meridional image plane curvature and the sagittal image plane curvature. Figure 2C The distortion curve of the optical imaging lens of Example 1 is shown, which represents the distortion magnitude value corresponding to different field of view angles. Figure 2D The magnification chromatic aberration curve of the optical imaging lens of Embodiment 1 is shown, which represents the deviation of different image heights on the imaging plane after light passes through the lens. According to Figures 2A to 2D It can be seen that the optical imaging lens given in Example 1 can achieve good imaging quality.

[0081] Example 2

[0082] The following is for reference Figures 3 to 4D This paper describes an optical imaging lens according to Embodiment 2 of this application. For the sake of brevity, descriptions similar to those in Embodiment 1 will be omitted in this embodiment and the following embodiments. Figure 3 A schematic diagram of the structure of an optical imaging lens according to Embodiment 2 of this application is shown.

[0083] like Figure 3As shown, the optical imaging lens includes, from the object side to the image side, an aperture stop 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 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 positive optical power, with its object-side surface S5 being convex and its image-side surface S6 being convex. The fourth lens E4 has negative optical power, with its object-side surface S7 being convex and its image-side surface S8 being concave. The fifth lens E5 has negative optical power, with its object-side surface S9 being convex 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 convex. The seventh lens E7 has negative optical power, with its object-side surface S13 being concave and its image-side surface S14 being concave. The filter E8 has an object-side surface S15 and an image-side surface S16. Light from the object passes sequentially through surfaces S1 to S16 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 radius of curvature, thickness / distance, effective radius and effective focal length are all millimeters (mm). Tables 5-1 and 5-2 show the higher-order coefficients that can be used for each aspherical mirror in Example 2, wherein each aspherical surface shape can be defined by formula (1) given in Example 1 above.

[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 provides the values ​​of some basic parameters of the optical imaging lens in Example 2.

[0095] parameter numerical values 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 on-axis chromatic aberration curve of the optical imaging lens of Embodiment 2 is shown, which represents the deviation of the focal point of light of different wavelengths after passing through the lens. Figure 4B The astigmatism curve of the optical imaging lens of Embodiment 2 is shown, which represents the meridional image plane curvature and the sagittal image plane curvature. Figure 4C The distortion curve of the optical imaging lens of Example 2 is shown, which represents the distortion magnitude value corresponding to different field of view angles. Figure 4D The magnification chromatic aberration curve of the optical imaging lens of Embodiment 2 is shown, which represents the deviation of different image heights on the imaging plane after light passes through the lens. According to Figures 4A to 4D It can be seen that the optical imaging lens given in Example 2 can achieve good imaging quality.

[0098] Example 3

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

[0100] like Figure 5 As shown, the optical imaging lens includes, from the object side to the image side, an aperture stop 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 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 positive optical power, with its object-side surface S5 being convex and its image-side surface S6 being convex. The fourth lens E4 has negative optical power, with its object-side surface S7 being convex and its image-side surface S8 being concave. The fifth lens E5 has negative optical power, with its object-side surface S9 being convex 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 convex. The seventh lens E7 has negative optical power, with its object-side surface S13 being concave and its image-side surface S14 being concave. The filter E8 has an object-side surface S15 and an image-side surface S16. Light from the object passes sequentially through surfaces S1 to S16 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 radius of curvature, thickness / distance, effective radius and effective focal length are all millimeters (mm). Tables 8-1 and 8-2 show the higher-order coefficients that can be used for each aspherical mirror in Example 3, wherein each aspherical surface shape can be defined by formula (1) given in Example 1 above.

[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 provides the values ​​of some basic parameters of the optical imaging lens in Example 3.

[0111] parameter numerical values 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] Figure 6A The on-axis chromatic aberration curve of the optical imaging lens of Embodiment 3 is shown, which indicates the deviation of the focal point of light of different wavelengths after passing through the lens. Figure 6B The astigmatism curve of the optical imaging lens of Embodiment 3 is shown, which represents the meridional image plane curvature and the sagittal image plane curvature. Figure 6C The distortion curve of the optical imaging lens of Example 3 is shown, which represents the distortion magnitude value corresponding to different field of view angles. Figure 6D The magnification chromatic aberration curve of the optical imaging lens of Embodiment 3 is shown, which represents the deviation of different image heights on the imaging plane after light passes through the lens. According to Figures 6A to 6D It can be seen that the optical imaging lens given in Example 3 can achieve good imaging quality.

[0114] Example 4

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

[0116] like Figure 7 As shown, the optical imaging lens includes, from the object side to the image side, an aperture stop 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 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 positive optical power, with its object-side surface S5 being convex and its image-side surface S6 being concave. The fourth lens E4 has negative optical power, with its object-side surface S7 being concave and its image-side surface S8 being concave. The fifth lens E5 has positive optical power, with its object-side surface S9 being convex 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. Light from the object passes sequentially through surfaces S1 to S16 and is finally imaged onto the imaging surface S17.

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

[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 provides the values ​​of some basic parameters of the optical imaging lens in Example 4.

[0127] parameter numerical values 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] Figure 8A The on-axis chromatic aberration curve of the optical imaging lens of Embodiment 4 is shown, which represents the deviation of the focal point of light of different wavelengths after passing through the lens. Figure 8B The astigmatism curve of the optical imaging lens of Embodiment 4 is shown, which represents the meridional image plane curvature and the sagittal image plane curvature. Figure 8C The distortion curve of the optical imaging lens of Example 4 is shown, which represents the distortion magnitude value corresponding to different field of view angles. Figure 8DThe magnification chromatic aberration curve of the optical imaging lens of Embodiment 4 is shown, which represents the deviation of different image heights on the imaging plane after light passes through the lens. According to Figures 8A to 8D It can be seen that the optical imaging lens given in Example 4 can achieve good imaging quality.

[0130] Example 5

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

[0132] like Figure 9 As shown, the optical imaging lens includes, from the object side to the image side, an aperture stop 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 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 positive optical power, with its object-side surface S5 being convex and its image-side surface S6 being concave. The fourth lens E4 has negative optical power, with its object-side surface S7 being concave and its image-side surface S8 being convex. The fifth lens E5 has negative optical power, with its object-side surface S9 being convex 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 convex. The seventh lens E7 has negative optical power, with its object-side surface S13 being concave and its image-side surface S14 being concave. The filter E8 has an object-side surface S15 and an image-side surface S16. Light from the object passes sequentially through surfaces S1 to S16 and is finally imaged onto the imaging surface S17.

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

[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 provides the values ​​of some basic parameters of the optical imaging lens in Example 5.

[0143] parameter numerical values 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] Figure 10A The on-axis chromatic aberration curve of the optical imaging lens of Embodiment 5 is shown, which represents the deviation of the focal point of light of different wavelengths after passing through the lens. Figure 10B The astigmatism curve of the optical imaging lens of Embodiment 5 is shown, which represents the meridional image plane curvature and the sagittal image plane curvature. Figure 10C The distortion curve of the optical imaging lens of Example 5 is shown, which represents the distortion magnitude value corresponding to different field of view angles. Figure 10D The magnification chromatic aberration curve of the optical imaging lens of Embodiment 5 is shown, which represents the deviation of different image heights on the imaging plane after light passes through the lens. According to Figures 10A to 10D It can be seen that the optical imaging lens given in Example 5 can achieve good imaging quality.

[0146] Example 6

[0147] The following is for reference Figures 11 to 12D An optical imaging lens according to Embodiment 6 of this application is described. Figure 11 A schematic diagram of the structure of an optical imaging lens according to Embodiment 6 of this application is shown.

[0148] like Figure 11 As shown, the optical imaging lens includes, from the object side to the image side, a first lens E1, an aperture stop 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 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 positive optical power, with its object-side surface S5 being convex and its image-side surface S6 being convex. The fourth lens E4 has negative optical power, with its object-side surface S7 being convex and its image-side surface S8 being concave. The fifth lens E5 has negative optical power, with its object-side surface S9 being convex 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 concave and its image-side surface S14 being concave. The filter E8 has an object-side surface S15 and an image-side surface S16. Light from the object passes sequentially through surfaces S1 to S16 and is finally imaged onto the imaging surface S17.

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

[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 provides the values ​​of some basic parameters of the optical imaging lens in Example 6.

[0159] parameter numerical values 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] Figure 12A The on-axis chromatic aberration curve of the optical imaging lens of Embodiment 6 is shown, which represents the deviation of the focal point of light of different wavelengths after passing through the lens. Figure 12B The astigmatism curve of the optical imaging lens of Embodiment 6 is shown, which represents the meridional image plane curvature and the sagittal image plane curvature. Figure 12C The distortion curve of the optical imaging lens of Example 6 is shown, which represents the distortion magnitude value corresponding to different field of view angles. Figure 12DThe magnification chromatic aberration curve of the optical imaging lens of Embodiment 6 is shown, which represents the deviation of different image heights on the imaging plane after light passes through the lens. According to Figures 12A to 12D It can be seen that the optical imaging lens given 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] This application also provides an imaging device, whose electronic photosensitive element can be a photocoupled device (CCD) or a complementary metal oxide semiconductor device (CMOS). The imaging device can be a stand-alone 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.

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

Claims

1. An optical imaging lens, characterized in that, sequentially from the object side to the image side along the optical axis comprises: a first lens with positive refractive power, an object side surface of which is a convex surface, and an image side surface of which is a concave surface; a second lens with negative refractive power, an object side surface of which is a convex surface, and an image side surface of which is a concave surface; a third lens with positive refractive power, an object side surface of which is a convex surface; a fourth lens with negative refractive power; a fifth lens, an object side surface of which is a convex surface, and an image side surface of which is a concave surface; a sixth lens with positive refractive power, an object side surface of which is a convex surface; a seventh lens with negative refractive power, an image side surface of which is a concave surface; a number of lenses with refractive power in the optical imaging lens is seven; a half of a diagonal line length of an effective pixel area on an imaging surface of the optical imaging lens ImgH satisfies: 5.22mm ≤ ImgH ≤ 6.20mm; an effective focal length f of the optical imaging lens, an entrance pupil diameter EPD of the optical imaging lens, and a maximum half field angle Semi-FOV of the optical imaging lens satisfy: 1.71 ≤ f / EPD × tan(Semi-FOV) < 2; and an effective focal length f7 of the seventh lens and a central thickness CT7 of the seventh lens on the optical axis satisfy: -12.42 ≤ f7 / CT7 ≤ -8.50; an effective focal length f1 of the first lens, a curvature radius R1 of the object side surface of the first lens, and a curvature radius R2 of the image side surface of the first lens satisfy: 0.5 ≤ f1 / (R2-R1) < 1; an effective focal length f of the optical imaging lens, an on-axis distance TTL from the object side surface of the first lens to the imaging surface of the optical imaging lens, and a half of a diagonal line length of an effective pixel area ImgH on the imaging surface of the optical imaging lens satisfy: 3.51 ≤ f / (TTL-ImgH) ≤ 5.45; an effective focal length f6 of the sixth lens and an effective focal length f7 of the seventh lens satisfy: -1.41 ≤ f6 / f7 ≤ -0.88; an effective focal length f1 of the first lens, an effective focal length f2 of the second lens, an effective focal length f3 of the third lens, and an effective focal length f4 of the fourth lens satisfy: -4.80 ≤ f2 / f1+f4 / f3 ≤ -3.08; the optical imaging lens further comprises a diaphragm, which is arranged 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 on-axis distance TTL from the object side surface of the first lens to the imaging surface of the optical imaging lens, and an on-axis distance SL from the diaphragm to the imaging surface of the optical imaging lens satisfy: 3.31 ≤ EPD / (TTL-SL) ≤ 5.92; air separations T45 of the fourth lens and the fifth lens on the optical axis, air separations T56 of the fifth lens and the sixth lens on the optical axis, and air separations T56 of the sixth lens and the seventh lens on the optical axis satisfy: 0.58 ≤ (T45+T56) / T67 ≤ 1; A maximum value ATmax of an air gap on the optical axis of any two adjacent lenses among the first to seventh lenses, and an axial distance BFL from an image side surface of the seventh lens to an imaging surface of the optical imaging lens satisfy: 0.89≤ATmax / BFL≤1.

22.

2. The optical imaging lens according to claim 1, wherein, An axial distance SAG11 between an intersection of a subject side surface of the first lens and the optical axis and an effective radius vertex of the subject side surface of the first lens, and an axial distance SAG22 between an intersection of an image side surface of the second lens and the optical axis and an effective radius vertex of the image side surface of the second lens satisfy: 1.36≤SAG11 / SAG22≤3.

76.

3. The optical imaging lens according to claim 1, wherein, An axial distance SAG41 between an intersection of a subject side surface of the fourth lens and the optical axis and an effective radius vertex of the subject side surface of the fourth lens, and an axial distance SAG42 between an intersection of an image side surface of the fourth lens and the optical axis and an effective radius vertex of the image side surface of the fourth lens, and an axial distance SAG51 between an intersection of a subject side surface of the fifth lens and the optical axis and an effective radius vertex of the subject side surface of the fifth lens, and an axial distance SAG52 between an intersection of an image side surface of the fifth lens and the optical axis and an effective radius vertex of the image side surface of the fifth lens satisfy: 0.43≤(SAG41+SAG42) / (SAG51+SAG52)≤1.

30.

4. The optical imaging lens according to any one of claims 1 to 3, wherein, An average value CTave of central thicknesses on the optical axis of the first to seventh lenses and a central thickness CT4 on the optical axis of the fourth lens satisfy: 1.2<CTave / CT4<1.

5.

5. The optical imaging lens according to any one of claims 1 to 3, wherein, A number V50 of lenses with an Abbe number greater than 50 among the first to seventh lenses satisfies: 3≤V50≤5.

6. The optical imaging lens according to any one of claims 1 to 3, wherein, Half of a diagonal length of an effective pixel area on an imaging surface of the optical imaging lens ImgH, an entrance pupil diameter EPD of the optical imaging lens, an effective radius DT11 of a subject side surface of the first lens, and an effective radius DT71 of a subject side surface of the seventh lens satisfy: 0.9<(DT71-DT11) / (ImgH-EPD)≤1.

14.

7. The optical imaging lens according to any one of claims 1 to 3, wherein, Half of a diagonal length of an effective pixel area on an imaging surface of the optical imaging lens ImgH and an effective radius DT11 of a subject side surface of the first lens satisfy: 3.55≤ImgH / DT11≤4.00.

Images