Optical imaging lens

Abstract

The utility model provides an optical imaging lens. The optical imaging lens comprises a lens barrel, a lens group and a plurality of spacers, wherein the lens group and the spacers are arranged in the lens barrel; the lens group comprises a first lens, a second lens, a third lens, a fourth lens, a fifth lens, a sixth lens and a seventh lens; the plurality of spacers includes a first spacer between the first lens and the second lens, a second spacer between the second lens and the third lens, a third spacer between the third lens and the fourth lens, and a fourth spacer between the fourth lens and the fifth lens. A fifth spacer between the fifth lens and the sixth lens, a sixth spacer between the sixth lens and the seventh lens, and a seventh spacer; when-25 lt; f1 / EP01lt; -5; 100 degree lt; the method comprises the following steps of: performing semi-fovt; at 110 DEG C; 0 lt; d1s / R2lt; 2; 1lt; 1lt; d2m / R4lt; 3. The optical imaging lens solves the problem that the optical imaging lens in the prior art is difficult to give consideration to both large field angle and high-quality imaging at the same time.

Description

Technical Field

[0001] The utility model relates to the technical field of optical imaging equipment, and in particular to an optical imaging lens. Background Art

[0002] With the rapid development of science and technology and the increase in people's needs, various electronic products with camera functions are highly sought after by users. Especially in some small-sized and easy-to-carry products, such as mobile phones, tablets, drones, VR, AR, etc., the imaging requirements for optical imaging lenses used in these products are getting higher and higher.

[0003] However, current optical imaging lenses have some problems. For example, under the premise of meeting the large field of view, the field curvature problem caused by the several lenses at the front end of the lens is difficult to improve, which affects the field curvature consistency of the final image. The MTF performance is also poor, affecting the image quality.

[0004] That is to say, the optical imaging lens in the prior art has the problem that it is difficult to achieve both a large field of view and high-quality imaging at the same time. Utility Model Content

[0005] The main purpose of the utility model is to provide an optical imaging lens to solve the problem that the optical imaging lens in the prior art has a large field of view and high-quality imaging.

[0006] To achieve the above object, the present utility model provides an optical imaging lens, which includes a lens barrel, a lens group and a plurality of spacers disposed in the lens barrel. The lens barrel has an object-side end face and an image-side end face; the lens group includes 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. There is an air gap between adjacent two of the first lens to the seventh lens; the plurality of spacers include a first spacer located between the first lens and the second lens, a second spacer located between the second lens and the third lens, a third spacer located between the third lens and the fourth lens, a fourth spacer located between the fourth lens and the fifth lens, a fifth spacer located between the fifth lens and the sixth lens, a sixth spacer located between the sixth lens and the seventh lens, and a seventh spacer located on the image side of the seventh lens; when the following conditions are satisfied: -25 < f1 / EP01 < -5, where f1 is the effective focal length of the first lens and EP01 is the on-axis distance from the object-side end face of the lens barrel to the object-side surface of the first spacer; and 100° < semi-fov < 110°, where semi-fov is the maximum half field of view of the optical imaging lens; then 0 < d1s / R2 < 2, where d1s is the inner diameter of the object-side surface of the first spacer and R2 is the curvature radius of the image-side surface of the first lens; and -1 < d2m / R4 < 3, where d2m is the inner diameter of the image-side surface of the second spacer and R4 is the curvature radius of the image-side surface of the second lens.

[0007] The present utility model also provides an optical imaging lens, which includes a lens barrel, a lens group and a plurality of spacers disposed in the lens barrel. The lens barrel has an object-side end face and an image-side end face; the lens group includes 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. There is an air gap between adjacent two of the first lens to the seventh lens; the plurality of spacers include a first spacer located between the first lens and the second lens, a second spacer located between the second lens and the third lens, a third spacer located between the third lens and the fourth lens, a fourth spacer located between the fourth lens and the fifth lens, a fifth spacer located between the fifth lens and the sixth lens, a sixth spacer located between the sixth lens and the seventh lens, and a seventh spacer located on the image side of the seventh lens; when the following conditions are satisfied: -25 < f1 / EP01 < -5, where f1 is the effective focal length of the first lens and EP01 is the on-axis distance from the object-side end face of the lens barrel to the object-side surface of the first spacer; and 100° < semi-fov < 110°, where semi-fov is the maximum half field of view of the optical imaging lens; and when 80 < V1 < 82, where V1 is the Abbe number of the first lens, then -12 < f1 / (D1s - d1s) < -2, where f1 is the effective focal length of the first lens, d1s is the inner diameter of the object-side surface of the first spacer, and D1s is the outer diameter of the object-side surface of the first spacer.

[0008] Further, when the Abbe number V1 of the first lens satisfies: 80 < V1 < 82, the following relationship holds among the effective focal length f1 of the first lens, the inner diameter d1s of the object side surface of the first spacer, and the outer diameter D1s of the object side surface of the first spacer: -12 < f1 / (D1s - d1s) < -2.

[0009] Further, among the first spacer to the seventh spacer, the inner diameter of the third spacer is the smallest; and the following relationship holds among the effective focal length f3 of the third lens, the effective focal length f4 of the fourth lens, the inner diameter d3m of the image side surface of the third spacer, and the outer diameter D3m of the image side surface of the third spacer: -2 < (D3m - d3m) / (f3 - f4) < 0.1.

[0010] Further, the following relationship holds among the outer diameter D2s of the object side surface of the second spacer, the outer diameter D3s of the object side surface of the third spacer, the curvature radius R5 of the object side surface of the third lens, and the curvature radius R6 of the image side surface of the third lens: 2 < D2s / R5 - D3s / R6 < 4.

[0011] Further, the following relationship holds among the effective focal length f4 of the fourth lens, the effective focal length f5 of the fifth lens, the outer diameter D4s of the object side surface of the fourth spacer, and the outer diameter D5s of the object side surface of the fifth spacer: 0 < D5s / f5 - D4s / f4 < 5.

[0012] Further, when the on-axis distance EP34 from the image side surface of the third spacer to the object side surface of the fourth spacer and the center thickness CT4 of the fourth lens satisfy: 1 < EP34 / CT4 < 2, the following relationship holds among the inner diameter d3m of the image side surface of the third spacer, the inner diameter d4s of the object side surface of the fourth spacer, the curvature radius R7 of the object side surface of the fourth lens, and the curvature radius R8 of the image side surface of the fourth lens: -0.5 < d3m / R7 + d4s / R8 < 0.

[0013] Further, when the on-axis distance EP45 from the image side surface of the fourth spacer to the object side surface of the fifth spacer and the on-axis distance EP56 from the image side surface of the fifth spacer to the object side surface of the sixth spacer satisfy: 1.5 < EP56 / EP45 < 5, the following relationship holds among the on-axis distance EP56 from the image side surface of the fifth spacer to the object side surface of the sixth spacer, the on-axis distance EP45 from the image side surface of the fourth spacer to the object side surface of the fifth spacer, the effective focal length f5 of the fifth lens, and the effective focal length f6 of the sixth lens: -3 < (EP56 - EP45) / (f6 - f5) < 1.

[0014] Further, when the center thickness CT5 of the fifth lens and the center thickness CT6 of the sixth lens satisfy: 1.2 < CT5 / CT6 < 1.7, the inner diameter d4s of the object side of the fourth spacer, the inner diameter d5s of the object side of the fifth spacer, and the inner diameter d6s of the object side of the sixth spacer satisfy: 1 < (d6s - d5s) / (d5s - d4s) < 2.

[0015] Further, the inner diameter d5m of the image side of the fifth spacer, the outer diameter D5m of the image side of the fifth spacer, the radius of curvature R10 of the image side of the fifth lens, and the radius of curvature R11 of the object side of the sixth lens satisfy: -1 < (R10 + R11) / (D5m - d5m) < 0.1.

[0016] Further, the inner diameter d5s of the object side of the fifth spacer, the inner diameter d6s of the object side of the sixth spacer, the effective focal length f5 of the fifth lens, and the effective focal length f6 of the sixth lens satisfy: -1 < d5s / f5 - d6s / f6 < 0.5.

[0017] Further, among the first spacer to the seventh spacer, the outer diameter of the image side of the seventh spacer is the largest; and the outer diameter D7m of the image side of the seventh spacer and the distance TD on the optical axis from the object side of the first lens to the image side of the seventh lens satisfy: 1 < D7m / TD < 2.

[0018] Further, the inner diameter d7s of the object side of the seventh spacer, the outer diameter D7s of the object side of the seventh spacer, and the center thickness CT7 of the seventh lens satisfy: 2 < (D7s - d7s) / CT7 < 20.

[0019] Further, the inner diameter d6s of the object side of the sixth spacer, the inner diameter d7s of the object side of the seventh spacer, the radius of curvature R13 of the object side of the seventh lens, and the radius of curvature R14 of the image side of the seventh lens satisfy: -1 < d7s / R14 - d6s / R13 < 3.

[0020] Further, the effective focal length f of the optical imaging lens, the maximum semi-field angle semi-fov of the optical imaging lens, and the height L of the lens barrel satisfy: -2 < f * tan(semi-fov) / L < -1.

[0021] Applying the technical solution of the present utility model, an optical imaging lens includes a lens barrel, a lens group and a plurality of spacers disposed in the lens barrel. The lens barrel has an object-side end face and an image-side end face; the lens group includes 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. There is an air gap between two adjacent lenses among the first lens to the seventh lens; the plurality of spacers include a first spacer located between the first lens and the second lens, a second spacer located between the second lens and the third lens, a third spacer located between the third lens and the fourth lens, a fourth spacer located between the fourth lens and the fifth lens, a fifth spacer located between the fifth lens and the sixth lens, a sixth spacer located between the sixth lens and the seventh lens, and a seventh spacer located on the image side of the seventh lens; when the effective focal length f1 of the first lens and the axial distance EP01 from the object-side end face of the lens barrel to the object-side surface of the first spacer satisfy: -25 < f1 / EP01 < -5; when the maximum half field of view semi-fov of the optical imaging lens satisfies: 100° < semi-fov < 110°; the inner diameter d1s of the object-side surface of the first spacer and the curvature radius R2 of the image-side surface of the first lens satisfy: 0 < d1s / R2 < 2; the inner diameter d2m of the image-side surface of the second spacer and the curvature radius R4 of the image-side surface of the second lens satisfy: -1 < d2m / R4 < 3.

[0022] The optical imaging lens of the present application is composed of a lens barrel, seven lenses and seven spacers disposed in the lens barrel. By reasonably arranging the seven lenses and seven spacers and when the optical imaging lens satisfies -25 < f1 / EP01 < -5 and 100° < semi-fov < 110°, there are problems with the fit of the front-end elements of the lens barrel in the case of an ultra-wide angle, and the system is prone to problems with field curvature anomalies in the first two lenses. By restricting 0 < d1s / R2 < 2 and -1 < d2m / R4 < 3, the inner diameters of the first two spacers and the curvature radii of the surfaces of the lenses in contact with them can be reasonably planned, which can reasonably optimize the fit between the first lens and the front end of the lens barrel. On the basis of ensuring good performance and structural requirements of the system, problems such as field curvature anomalies when the system passes through the first two lenses can be reduced, so that the overall field curvature consistency of the system is better, and at the same time, the problem of poor MTF performance can be improved, and the reliability of the entire optical imaging lens can be enhanced. Description of the Drawings

[0023] The specification drawings forming a part of the present application are used to provide a further understanding of the present utility model. The schematic embodiments of the present utility model and their descriptions are used to explain the present utility model and do not constitute an improper limitation of the present utility model. In the drawings:

[0024] Figure 1A dimension diagram of an optical imaging lens of an optional embodiment of the utility model is shown;

[0025] Figure 2 A schematic structural diagram of an optical imaging lens in a first state according to a first embodiment of the utility model is shown;

[0026] Figure 3 A schematic structural diagram of an optical imaging lens in a second state according to a first embodiment of the utility model is shown;

[0027] Figure 4 A schematic structural diagram of an optical imaging lens in a third state according to a first embodiment of the present utility model is shown;

[0028] Figure 5 and Figure 6 The axial chromatic aberration curve and the astigmatism curve of the first embodiment of the utility model are respectively shown;

[0029] Figure 7 A schematic structural diagram of an optical imaging lens in a first state according to a second embodiment of the present utility model is shown;

[0030] Figure 8 A schematic structural diagram of an optical imaging lens in a second state according to a second embodiment of the present utility model is shown;

[0031] Fig. 9 A schematic structural diagram of an optical imaging lens in a third state according to a second embodiment of the present utility model is shown;

[0032] Figure 10 to Figure 11 The axial chromatic aberration curve and the astigmatism curve of the second embodiment of the utility model are respectively shown;

[0033] Fig.12 A schematic structural diagram of an optical imaging lens in a first state according to a third embodiment of the present utility model is shown;

[0034] Fig.13 A schematic structural diagram of an optical imaging lens in a second state according to a third embodiment of the present utility model is shown;

[0035] Fig.14 A schematic structural diagram of an optical imaging lens in a third state according to a third embodiment of the present utility model is shown;

[0036] Fig.15 and Fig.16 The axial chromatic aberration curve and the astigmatism curve of the third embodiment of the utility model are respectively shown;

[0037] Fig.17An MTF defocus curve diagram is shown when the optical imaging lens of an optional embodiment of the utility model satisfies semi-fov=100.1° and f1 / EP01=-9.29, and d1s / R2=-2 and d2m / R4=-3;

[0038] Fig.18 An MTF defocus curve diagram is shown when the optical imaging lens of an optional embodiment of the utility model satisfies semi-fov=100.1° and f1 / EP01=-9.29, and d1s / R2=5 and d2m / R4=6;

[0039] Fig.19 The MTF defocus curve diagram is shown when d1s / R2=1.16 and d2m / R4=2.01, under the premise that the optical imaging lens of an optional embodiment of the utility model meets semi-fov=100.1° and f1 / EP01=-9.29.

[0040] The above drawings include the following reference numerals:

[0041] P0, lens barrel; E1, first lens; S1, object side surface of the first lens; S2, image side surface of the first lens; E2, second lens; S3, object side surface of the second lens; S4, image side surface of the second lens; E3, third lens; S5, object side surface of the third lens; S6, image side surface of the third lens; E4, fourth lens; S7, object side surface of the fourth lens; S8, image side surface of the fourth lens; E5, fifth lens; S9, object side surface of the fifth lens; S10, image side surface of the fifth lens; E6, sixth lens; S11, object side surface of the sixth lens; S12, image side surface of the sixth lens; E7, seventh lens; S13, object side surface of the seventh lens; S14, image side surface of the seventh lens; P1, first spacer; P2, second spacer; P3, third spacer; P4, fourth spacer; P5, fifth spacer; P6, sixth spacer; P7, seventh spacer. DETAILED DESCRIPTION

[0042] 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 utility model will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0043] It should be noted that, unless otherwise specified, all technical and scientific terms used in this application have the same meanings as commonly understood by ordinary technicians in the technical field to which this application belongs.

[0044] In the present invention, unless otherwise specified, the directional words used, such as "up, down, top, bottom", usually refer to the directions shown in the drawings, or to the components themselves in the vertical, perpendicular or gravity directions; similarly, for ease of understanding and description, "inside and outside" refer to the inside and outside relative to the outline of each component itself, but the above-mentioned directional words are not used to limit the present invention.

[0045] 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.

[0046] In the 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 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 for illustration only and are not drawn strictly to scale.

[0047] In this article, the paraxial area refers to the area 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 area; 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 area. The judgment of the surface shape in the paraxial area can be based on the judgment method of ordinary knowledgeable people in this field, and the positive and negative R value (R refers to the radius of curvature of the paraxial area, usually refers to the R value on the lens database (lens data) in the optical software) is used to judge the convexity and concavity. For the light incident side, when the R value is positive, it is judged as a convex surface, and when the R value is negative, it is judged as a concave surface; for the light exiting side, when the R value is positive, it is judged as a concave surface, and when the R value is negative, it is judged as a convex surface.

[0048] In order to solve the problem that it is difficult to simultaneously achieve a large field of view and high-quality imaging in optical imaging lenses in the prior art, the utility model provides an optical imaging lens.

[0049] like Figures 1 to 19As shown, in an alternative embodiment of the present application, the optical imaging lens includes a lens barrel, a lens group, and a plurality of spacers disposed in the lens barrel. The lens barrel has an object-side end face and an image-side end face; the lens group includes 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. There is an air gap between adjacent two lenses among the first lens to the seventh lens; the plurality of spacers include a first spacer located between the first lens and the second lens, a second spacer located between the second lens and the third lens, a third spacer located between the third lens and the fourth lens, a fourth spacer located between the fourth lens and the fifth lens, a fifth spacer located between the fifth lens and the sixth lens, a sixth spacer located between the sixth lens and the seventh lens, and a seventh spacer located on the image side of the seventh lens; when the effective focal length f1 of the first lens and the on-axis distance EP01 from the object-side end face of the lens barrel to the object-side surface of the first spacer satisfy: -25 < f1 / EP01 < -5; when the maximum semi-field angle semi-fov of the optical imaging lens satisfies: 100° < semi-fov < 110°; the inner diameter d1s of the object-side surface of the first spacer and the curvature radius R2 of the image-side surface of the first lens satisfy: 0 < d1s / R2 < 2; the inner diameter d2m of the image-side surface of the second spacer and the curvature radius R4 of the image-side surface of the second lens satisfy: -1 < d2m / R4 < 3.

[0050] The optical imaging lens of the present application is composed of a lens barrel, seven lenses, and seven spacers disposed in the lens barrel. By reasonably arranging the seven lenses and seven spacers and when the optical imaging lens satisfies -25 < f1 / EP01 < -5 and 100° < semi-fov < 110°, there are problems with the fit of the front-end element of the lens barrel in the case of an ultra-wide angle, and the system is prone to problems with field curvature anomalies in the first two lenses. By restricting 0 < d1s / R2 < 2 and -1 < d2m / R4 < 3, the inner diameters of the first two spacers and the curvature radii of the surfaces of the lenses in contact with them can be reasonably planned, which can reasonably optimize the fit between the first lens and the front end of the lens barrel. On the basis of ensuring good performance and structural requirements of the system, problems such as field curvature anomalies when the system passes through the first two lenses can be reduced, so that the overall field curvature consistency of the system is better, and at the same time, the problem of poor MTF performance can be improved, and the reliability of the entire optical imaging lens can be enhanced.

[0051] In addition, on the premise that the optical imaging lens satisfies semi-fov = 100.1° and f1 / EP01 = -9.29, Fig.17 The MTF defocus curve graph when d1s / R2 = -2 and d2m / R4 = -3 is shown, Fig.18 The MTF defocus curve graph when d1s / R2 = 5 and d2m / R4 = 6 is shown, Fig.19The MTF defocus curve graph when d1s / R2 = 1.16 and d2m / R4 = 2.01 is shown. From Fig.17 , Fig.18 and Fig.19 as shown, the MTF defocus curve performs poorly when d1s / R2 = -2 and d2m / R4 = -3; the MTF defocus curve performs poorly when d1s / R2 = 5 and d2m / R4 = 6; the MTF defocus curve performs better when d1s / R2 = 1.16 and d2m / R4 = 2.01. It can be seen that when d1s / R2 is in the range of 0 to 2 and d2m / R4 is in the range of -1 to 3, the MTF defocus curve of the optical imaging lens performs best. Therefore, by restricting 0 < d1s / R2 < 2 and -1 < d2m / R4 < 3 in this application, problems such as abnormal field curvature when the system passes through the first two lenses can be reduced, so that the overall field curvature consistency of the system is better, and at the same time, the performance of the MTF defocus curve is improved, which is beneficial to improving the quality and yield of the system and enhancing the reliability of the system.

[0052] In this embodiment, when the Abbe number V1 of the first lens satisfies: 80 < V1 < 82, the effective focal length f1 of the first lens, the inner diameter d1s of the object side of the first spacer and the outer diameter D1s of the object side of the first spacer satisfy: -12 < f1 / (D1s - d1s) < -2. When the Abbe number V1 of the first lens is between 80 and 82, restricting this conditional formula is beneficial to effectively intercept unnecessary imaging light through the first spacer, reduce stray light, and at the same time control the inner and outer diameters of the object side of the first spacer, which is beneficial to ensuring the ring bandwidth of the first spacer and improving the manufacturability of the first spacer.

[0053] In this embodiment, among the first spacer to the seventh spacer, the inner diameter of the third spacer is the smallest; and the effective focal length f3 of the third lens, the effective focal length f4 of the fourth lens, the inner diameter d3m of the image side of the third spacer and the outer diameter D3m of the image side of the third spacer satisfy: -2 < (D3m - d3m) / (f3 - f4) < 0.1. By restricting this conditional formula and controlling the effective focal lengths of the third lens and the fourth lens at the same time, it is beneficial to achromatism; in addition, controlling the relationship between the inner and outer diameters of the third spacer is beneficial to avoiding stray light while ensuring the structural consistency of the optical imaging lens.

[0054] In this embodiment, the outer diameter D2s of the object side of the second spacer, the outer diameter D3s of the object side of the third spacer, the curvature radius R5 of the object side of the third lens and the curvature radius R6 of the image side of the third lens satisfy: 2 < D2s / R5 - D3s / R6 < 4. Restricting this conditional formula and controlling the outer diameters of the object sides of the second spacer and the third spacer and the curvature radii of the object and image sides of the third lens is beneficial to the consistent structural arrangement of the lens barrel and internal components, and contributes to the overall assembly stability.

[0055] In this embodiment, the effective focal length f4 of the fourth lens, the effective focal length f5 of the fifth lens, the outer diameter D4s of the object side surface of the fourth spacer, and the outer diameter D5s of the object side surface of the fifth spacer satisfy: 0 < D5s / f5 - D4s / f4 < 5. Controlling the outer diameters of the object sides of the fourth spacer and the fifth spacer and the effective focal lengths of the fourth lens and the fifth lens is conducive to better receiving the light passing through the fourth lens on the fifth lens, and is more conducive to the imaging of the entire optical system. The outer diameter constraint of the spacer further restricts the outer diameter of the lens, which is conducive to the design of the entire lens barrel and the component structure.

[0056] In this embodiment, when the on-axis distance EP34 from the image side surface of the third spacer to the object side surface of the fourth spacer and the central thickness CT4 of the fourth lens satisfy: 1 < EP34 / CT4 < 2, the inner diameter d3m of the image side surface of the third spacer, the inner diameter d4s of the object side surface of the fourth spacer, the curvature radius R7 of the object side surface of the fourth lens, and the curvature radius R8 of the image side surface of the fourth lens satisfy: -0.5 < d3m / R7 + d4s / R8 < 0. By restricting the ratio relationship between the on-axis distance from the image side surface of the third spacer to the object side surface of the fourth spacer and the central thickness of the fourth lens, and simultaneously controlling the inner diameters of the image side of the third spacer and the object side of the fourth spacer and the curvature radii of the object side and the image side of the fourth lens, it is beneficial to avoid the interference between the inner diameter boundary of the spacer and the effective diameter region of the lens, resulting in the deformation of the spacer and causing RI anomalies.

[0057] In this embodiment, when the on-axis distance EP45 from the image side surface of the fourth spacer to the object side surface of the fifth spacer and the on-axis distance EP56 from the image side surface of the fifth spacer to the object side surface of the sixth spacer satisfy: 1.5 < EP56 / EP45 < 5, the on-axis distance EP56 from the image side surface of the fifth spacer to the object side surface of the sixth spacer, the on-axis distance EP45 from the image side surface of the fourth spacer to the object side surface of the fifth spacer, the effective focal length f5 of the fifth lens, and the effective focal length f6 of the sixth lens satisfy: -3 < (EP56 - EP45) / (f6 - f5) < 1. By restricting the relationship of 1.5 < EP56 / EP45 < 5 and simultaneously controlling the ratio of the difference between the on-axis distance from the image side surface of the fourth spacer to the object side surface of the fifth spacer and the on-axis distance from the image side surface of the fifth spacer to the object side surface of the sixth spacer to the focal length difference between the sixth lens and the fifth lens, it is beneficial to the imaging reception of the fifth lens and the sixth lens and avoid defocusing of the optical system imaging, resulting in low imaging quality.

[0058] In this embodiment, when the center thickness CT5 of the fifth lens and the center thickness CT6 of the sixth lens satisfy: 1.2 < CT5 / CT6 < 1.7, the inner diameter d4s of the object side surface of the fourth spacer, the inner diameter d5s of the object side surface of the fifth spacer, and the inner diameter d6s of the object side surface of the sixth spacer satisfy: 1 < (d6s - d5s) / (d5s - d4s) < 2. By restricting the relationship between the center thicknesses of the fifth lens and the sixth lens, and simultaneously controlling the relationship between the inner diameters of the object side surfaces of the fourth spacer, the fifth spacer, and the sixth spacer, it is beneficial to avoid abnormal reliability caused by too small an air gap between the fifth lens and the sixth lens. At the same time, the relationship between the inner diameters of the spacers allows the imaging light to better pass through the lens and be presented on the image surface, improving the ability of the optical imaging lens to restore the real object.

[0059] In this embodiment, the inner diameter d5m of the image side surface of the fifth spacer, the outer diameter D5m of the image side surface of the fifth spacer, the radius of curvature R10 of the image side surface of the fifth lens, and the radius of curvature R11 of the object side surface of the sixth lens satisfy: -1 < (R10 + R11) / (D5m - d5m) < 0.1. By restricting the relationship between the sum of the radii of curvature of the image side of the fifth lens and the object side of the sixth lens and the difference between the inner and outer diameters of the fifth spacer, it is beneficial to avoid the risk of assembly interference caused by the adjacent mirror surfaces of the fifth lens and the sixth lens being too close, and at the same time prevent the spacer annulus from being too small and the component strength from being too low to be assembled when they are too far apart.

[0060] In this embodiment, the inner diameter d5s of the object side surface of the fifth spacer, the inner diameter d6s of the object side surface of the sixth spacer, the effective focal length f5 of the fifth lens, and the effective focal length f6 of the sixth lens satisfy: -1 < d5s / f5 - d6s / f6 < 0.5. By restricting the relationship between the inner diameters of the object sides of the fifth spacer and the sixth spacer and the effective focal lengths of the fifth lens and the sixth lens, the positions of the spacers and the lenses can be effectively controlled. Controlling the inner diameter is beneficial to preventing problems such as light leakage causing stray light or excessive light blocking resulting in RI abnormalities due to the inner diameter of the spacer being too large or too small.

[0061] In this embodiment, among the first spacer to the seventh spacer, the outer diameter of the image side surface of the seventh spacer is the largest; and the outer diameter D7m of the image side surface of the seventh spacer and the distance TD on the optical axis from the object side surface of the first lens to the image side surface of the seventh lens satisfy: 1 < D7m / TD < 2. Satisfying this conditional formula is beneficial to controlling the overall appearance integrated streamline design of the lens barrel and the arrangement of the internal structure, and is beneficial to the assembly stability.

[0062] In this embodiment, the inner diameter d7s of the object side surface of the seventh spacer, the outer diameter D7s of the object side surface of the seventh spacer, and the central thickness CT7 of the seventh lens satisfy: 2 < (D7s - d7s) / CT7 < 20. Constraining this conditional expression is beneficial to the optical system design at the front end of the system while taking into account the connection of the optical system at the back end, and helps with the structural stacking design and manufacturing of internal components.

[0063] In this embodiment, the inner diameter d6s of the object side surface of the sixth spacer, the inner diameter d7s of the object side surface of the seventh spacer, the curvature radius R13 of the object side surface of the seventh lens, and the curvature radius R14 of the image side surface of the seventh lens satisfy: -1 < d7s / R14 - d6s / R13 < 3. Constraining this conditional expression is beneficial to avoiding the interference phenomenon between the central effective area of the seventh lens and the inner diameter side of the spacer.

[0064] In this embodiment, the effective focal length f of the optical imaging lens, the maximum semi-field angle semi-fov of the optical imaging lens, and the height L of the lens barrel satisfy: -2 < f * tan(semi-fov) / L < -1. The height L of the lens barrel is the distance along the optical axis from the object side end face of the lens barrel to the image side end face of the lens barrel. By controlling the effective focal length, the maximum semi-field angle, and the height of the lens barrel of the optical imaging lens, it is beneficial to the design of the overall appearance of the lens barrel and avoids the risk of reducing the assembly stability due to excessive spacing between the lenses inside the optical system.

[0065] In addition, in another alternative embodiment of the present application, the optical imaging lens includes a lens barrel and a lens group and a plurality of spacers disposed in the lens barrel. The lens barrel has an object side end face and an image side end face; the lens group includes 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. There is an air gap between adjacent two of the first lens to the seventh lens; the plurality of spacers include a first spacer between the first lens and the second lens, a second spacer between the second lens and the third lens, a third spacer between the third lens and the fourth lens, a fourth spacer between the fourth lens and the fifth lens, a fifth spacer between the fifth lens and the sixth lens, a sixth spacer between the sixth lens and the seventh lens, and a seventh spacer on the image side of the seventh lens; the effective focal length f1 of the first lens and the axial distance EP01 from the object side end face of the lens barrel to the object side surface of the first spacer satisfy: -25 < f1 / EP01 < -5; the maximum semi-field angle semi-fov of the optical imaging lens satisfies: 100° < semi-fov < 110°; when the Abbe number V1 of the first lens satisfies: 80 < V1 < 82, the effective focal length f1 of the first lens, the inner diameter d1s of the object side surface of the first spacer, and the outer diameter D1s of the object side surface of the first spacer satisfy: -12 < f1 / (D1s - d1s) < -2.

[0066] The optical imaging lens of the present application is composed of a lens barrel and seven lenses and seven spacers arranged in the lens barrel. By reasonably arranging the seven lenses and seven spacers, on the premise of satisfying -25 < f1 / EP01 < -5 and 100° < semi-fov < 110°, restricting -12 < f1 / (D1s - d1s) < -2 is beneficial to enable the optical imaging lens to have better field curvature consistency and higher imaging quality on the basis of having a large field of view angle. The present application can reasonably optimize the cooperation between the first lens and the front end of the lens barrel while satisfying the characteristics of an ultra-wide angle, and improve the light transmittance of the system. When the Abbe number V1 of the first lens is in the range of 80 to 82, controlling f1 / (D1s - d1s) is beneficial to effectively intercept unnecessary imaging light through the first spacer, reduce stray light, and at the same time control the inner diameter and outer diameter of the object side of the first spacer, which is beneficial to ensuring the ring bandwidth of the first spacer and improving the manufacturability of the first spacer.

[0067] Of course, other parameter formulas in the above embodiments may also be included in this embodiment, which will not be elaborated here one by one.

[0068] Optionally, the above optical imaging lens may further include a protective glass for protecting the photosensitive element located on the imaging surface.

[0069] In the optical imaging lens of the present application, multiple lenses can be used, such as the seven lenses mentioned above. In the present application, at least one of the lens surfaces of each lens is an aspherical surface. The characteristics of an aspherical lens are that the curvature changes continuously from the center of the lens to the periphery of the lens. Different from a spherical lens with a constant curvature from the center of the lens to the periphery of the lens, an aspherical lens has better curvature radius characteristics and has the advantages of improving distortion aberration and astigmatism aberration. After using an aspherical lens, it is possible to eliminate the aberration that appears during imaging as much as possible, thereby improving the imaging quality.

[0070] 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 the seven-lens example is described in the embodiment, the optical imaging lens is not limited to including seven lenses. If necessary, the optical imaging lens may also include other numbers of lenses.

[0071] Figure 1 A schematic structural diagram of an optical imaging lens of the present application is shown, where Figure 1Parameters such as D4s, d4s, D3m, D3s, d3m, D2s, d2m, D1s, d1s, d5s, d5m, D5s, D5m, d6s, d7s, D7s, D7m, L, EP01, EP34, EP45, and EP56 are indicated in the figure to clearly and intuitively understand the meaning of the parameters. In order to facilitate the optical imaging lens and the specific surface shape, these parameters will no longer be reflected in the drawings when describing the specific embodiments later.

[0072] The following further describes examples of specific surface shapes and parameters of the optical imaging lens applicable to the above-mentioned embodiments with reference to the accompanying drawings.

[0073] It should be noted that in the following embodiments, there are the first state, the second state and the third state, and in the first state, the second state and the third state of the same embodiment, the parameters such as the curvature radius, the center thickness of the first lens to the seventh lens, the spacing distance between the lenses and the coefficient of the higher order terms are the same, but the parameters such as the thickness, the inner diameter and the outer diameter of the lens barrel, the first spacer to the sixth spacer and the shape of some lenses are different. In other words, the main structure for imaging is the same, but the auxiliary structure for imaging is different.

[0074] It should be noted that any one of the following embodiments 1 to 3 is applicable to all embodiments of the present application.

[0075] Embodiment 1

[0076] like Figures 2 to 6 As shown, the optical imaging lens of the first embodiment is described. Figure 2 FIG. 1 is a schematic diagram showing the structure of the optical imaging lens of Embodiment 1 in a first state. Figure 3 FIG. 4 is a schematic diagram showing the structure of the optical imaging lens in the first embodiment in the second state. Figure 4 A schematic structural diagram of the optical imaging lens of Embodiment 1 in a third state is shown.

[0077] like Figures 2 to 4 As shown, the optical imaging lens includes a lens barrel P0 and arranged in sequence in the lens barrel P0 from the object side to the image side along the optical axis of the lens barrel P0: a first lens E1, a first spacer P1, a second lens E2, a second spacer P2, a third lens E3, a third spacer P3, a fourth lens E4, a fourth spacer P4, a fifth lens E5, a fifth spacer P5, a sixth lens E6, a sixth spacer P6, a seventh lens E7 and a seventh spacer P7.

[0078] like Figure 2As shown, in the first state, the object side surface S1 of the first lens partially abuts against the lens barrel P0. The object side surface and image side surface of the first spacer P1 partially abut against the image side surface S2 of the first lens and the object side surface S3 of the second lens, respectively. The object side surface and image side surface of the second spacer P2 partially abut against the image side surface S4 of the second lens and the object side surface S5 of the third lens, respectively. The object side surface and image side surface of the third spacer P3 partially abut against the image side surface S6 of the third lens and the object side surface S7 of the fourth lens, respectively. The object side surface and image side surface of the fourth spacer P4 partially abut against the image side surface S8 of the fourth lens and the object side surface S9 of the fifth lens, respectively. The object side surface and image side surface of the fifth spacer P5 partially abut against the image side surface S10 of the fifth lens and the object side surface S11 of the sixth lens, respectively. The object side surface and image side surface of the sixth spacer P6 partially abut against the image side surface S12 of the sixth lens and the object side surface S13 of the seventh lens, respectively. The object-side surface and the image-side surface of the seventh spacer P7 are in contact with the image-side surface S14 of the seventh lens and a portion of the inner wall surface of the lens barrel P0 , respectively.

[0079] like Figure 3 As shown, when the optical imaging lens is in the second state, the supporting and abutting manner of each spacer is the same as that in the first state. Please refer to the relevant description in the first state and will not be repeated here.

[0080] like Figure 4 As shown, when the optical imaging lens is in the third state, the supporting and abutting manner of each spacer is the same as that in the first state. Please refer to the relevant description in the first state and will not be repeated here.

[0081] In summary, the structural parameters of the optical imaging lens of Example 1 in the first state 1-1, the second state 1-2 and the third state 1-3 are shown in Table 1. (Unit: mm)

[0082]

[0083] Table 1

[0084] In Embodiment 1, the object side surface S1 of the first lens is a convex surface, and the image side surface S2 of the first lens is a concave surface. The object side surface S3 of the second lens is a convex surface, and the image side surface S4 of the second lens is a concave surface. The object side surface S5 of the third lens is a convex surface, and the image side surface S6 of the third lens is a concave surface. The object side surface S7 of the fourth lens is a concave surface, and the image side surface S8 of the fourth lens is a convex surface. The object side surface S9 of the fifth lens is a convex surface, and the image side surface S10 of the fifth lens is a convex surface. The object side surface S11 of the sixth lens is a convex surface, and the image side surface S12 of the sixth lens is a convex surface. The object side surface S13 of the seventh lens is a concave surface, and the image side surface S14 of the seventh lens is a convex surface.

[0085] In Embodiment 1, the effective focal length f of the optical imaging lens is 1.96 mm, the effective focal length f1 of the first lens is -15.51 mm, the effective focal length f2 of the second lens is -3.55 mm, the effective focal length f3 of the third lens is 4.05 mm, the effective focal length f4 of the fourth lens is 10.64 mm, the effective focal length f5 of the fifth lens is 5.37 mm, the effective focal length f6 of the sixth lens is 3.27 mm, the effective focal length f7 of the seventh lens is -5.21 mm, and the maximum semi-field angle semi-fov of the optical imaging lens is 100.10°.

[0086] Table 2 shows the basic structural parameters of the optical imaging lens of Example 1, wherein the units of the radius of curvature and thickness / distance are all millimeters.

[0087]

[0088] Table 2

[0089] In the first embodiment, the object side surface and the image side surface of the second lens to the seventh lens are all aspherical surfaces, and the surface shape of each aspherical lens can be defined by but not limited to the following aspherical surface formula:

[0090]

[0091] 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, that is, the paraxial curvature c is the reciprocal of the curvature radius R in the above Table 1; k is the cone coefficient; Ai is the correction coefficient of the i-th order of the aspheric surface. The following Table 3 shows the high-order coefficients A4, A6, A8, A10, A12, A14, A16, A18, A20, A22, A24, A26, A28 and A30 that can be used for each aspheric mirror surface S3-S14 in Example 1.

[0092]

[0093]

[0094] Table 3

[0095] Figure 5 The axial chromatic aberration curve of the optical imaging lens of the first embodiment is shown, which indicates the deviation of the focal point of light of different wavelengths after passing through the optical imaging lens. Figure 6 The astigmatism curve of the optical imaging lens of the first embodiment is shown, which represents the meridional image curvature and the sagittal image curvature.

[0096] according to Figure 5 and Figure 6 It can be seen that the optical imaging lens provided in the first embodiment can achieve good imaging quality.

[0097] Embodiment 2

[0098] like Figures 7 to 11 As shown, the optical imaging lens of the second embodiment is described. Figure 7 FIG. 1 shows a schematic structural diagram of the optical imaging lens of Embodiment 2 in a first state. Figure 8 FIG. 2 shows a schematic structural diagram of the optical imaging lens of Embodiment 2 in a second state. Fig. 9 A schematic structural diagram of the optical imaging lens of the second embodiment in a third state is shown.

[0099] like Figures 7 to 9 As shown, the optical imaging lens includes a lens barrel P0 and arranged in sequence in the lens barrel P0 from the object side to the image side along the optical axis of the lens barrel P0: a first lens E1, a first spacer P1, a second lens E2, a second spacer P2, a third lens E3, a third spacer P3, a fourth lens E4, a fourth spacer P4, a fifth lens E5, a fifth spacer P5, a sixth lens E6, a sixth spacer P6, a seventh lens E7 and a seventh spacer P7.

[0100] like Figure 7 As shown, in the first state, the object side surface S1 of the first lens partially abuts against the lens barrel P0. The object side surface and image side surface of the first spacer P1 partially abut against the image side surface S2 of the first lens and the object side surface S3 of the second lens, respectively. The object side surface and image side surface of the second spacer P2 partially abut against the image side surface S4 of the second lens and the object side surface S5 of the third lens, respectively. The object side surface and image side surface of the third spacer P3 partially abut against the image side surface S6 of the third lens and the object side surface S7 of the fourth lens, respectively. The object side surface and image side surface of the fourth spacer P4 partially abut against the image side surface S8 of the fourth lens and the object side surface S9 of the fifth lens, respectively. The object side surface and image side surface of the fifth spacer P5 partially abut against the image side surface S10 of the fifth lens and the object side surface S11 of the sixth lens, respectively. The object side surface and image side surface of the sixth spacer P6 partially abut against the image side surface S12 of the sixth lens and the object side surface S13 of the seventh lens, respectively. The object-side surface and the image-side surface of the seventh spacer P7 are in contact with the image-side surface S14 of the seventh lens and a portion of the inner wall surface of the lens barrel P0 , respectively.

[0101] like Figure 8 As shown, when the optical imaging lens is in the second state, the supporting and abutting manner of each spacer is the same as that in the first state. Please refer to the relevant description in the first state and will not be repeated here.

[0102] like Fig. 9 As shown, when the optical imaging lens is in the third state, the supporting and abutting manner of each spacer is the same as that in the first state. Please refer to the relevant description in the first state and will not be repeated here.

[0103] In summary, the structural parameters of the optical imaging lens of the second embodiment in the first state 2-1, the second state 2-2 and the third state 2-3 are shown in Table 4. (Unit: mm)

[0104]

[0105] Table 4

[0106] In the second embodiment, the object side surface S1 of the first lens is a convex surface, and the image side surface S2 of the first lens is a concave surface. The object side surface S3 of the second lens is a convex surface, and the image side surface S4 of the second lens is a concave surface. The object side surface S5 of the third lens is a convex surface, and the image side surface S6 of the third lens is a concave surface. The object side surface S7 of the fourth lens is a concave surface, and the image side surface S8 of the fourth lens is a convex surface. The object side surface S9 of the fifth lens is a convex surface, and the image side surface S10 of the fifth lens is a convex surface. The object side surface S11 of the sixth lens is a convex surface, and the image side surface S12 of the sixth lens is a convex surface. The object side surface S13 of the seventh lens is a concave surface, and the image side surface S14 of the seventh lens is a concave surface.

[0107] In Example 2, the effective focal length f of the optical imaging lens is 1.98 mm, the effective focal length f1 of the first lens is -31.42 mm, the effective focal length f2 of the second lens is -2.92 mm, the effective focal length f3 of the third lens is 3.88 mm, the effective focal length f4 of the fourth lens is 16.60 mm, the effective focal length f5 of the fifth lens is 3.49 mm, the effective focal length f6 of the sixth lens is 3.09 mm, the effective focal length f7 of the seventh lens is -2.80 mm, and the maximum semi-field angle semi-fov of the optical imaging lens is 100.50°.

[0108] Table 5 shows a basic structural parameter table of the optical imaging lens of Example 2, wherein the units of the radius of curvature and thickness / distance are all millimeters.

[0109]

[0110] Table 5

[0111] Table 6 shows the polynomial coefficients that can be used for each aspheric mirror surface in the second embodiment, wherein each aspheric surface shape can be defined by the formula (1) given in the first embodiment above.

[0112]

[0113]

[0114] Table 6

[0115] Fig.10 The axial chromatic aberration curve of the optical imaging lens of the second embodiment is shown, which indicates the deviation of the focal point of light of different wavelengths after passing through the optical imaging lens. Fig.11 The astigmatism curve of the optical imaging lens of the second embodiment is shown, which represents the meridional image curvature and the sagittal image curvature.

[0116] according to Fig.10 and Fig.11 It can be seen that the optical imaging lens provided in the second embodiment can achieve good imaging quality.

[0117] Embodiment 3

[0118] like Figures 12 to 16 As shown, the optical imaging lens of embodiment 3 is described. Fig.12 FIG. 1 shows a schematic structural diagram of the optical imaging lens of Embodiment 3 in a first state. Fig.13 FIG. 1 shows a schematic diagram of the structure of the optical imaging lens of Embodiment 3 in the second state. Fig.14 A schematic structural diagram of the optical imaging lens of Embodiment 3 in a third state is shown.

[0119] like Figure 12 to Figure 14 As shown, the optical imaging lens includes a lens barrel P0 and arranged in sequence in the lens barrel P0 from the object side to the image side along the optical axis of the lens barrel P0: a first lens E1, a first spacer P1, a second lens E2, a second spacer P2, a third lens E3, a third spacer P3, a fourth lens E4, a fourth spacer P4, a fifth lens E5, a fifth spacer P5, a sixth lens E6, a sixth spacer P6, a seventh lens E7 and a seventh spacer P7.

[0120] like Fig.12 As shown, in the first state, the object side surface S1 of the first lens partially abuts against the lens barrel P0. The object side surface and image side surface of the first spacer P1 partially abut against the image side surface S2 of the first lens and the object side surface S3 of the second lens, respectively. The object side surface and image side surface of the second spacer P2 partially abut against the image side surface S4 of the second lens and the object side surface S5 of the third lens, respectively. The object side surface and image side surface of the third spacer P3 partially abut against the image side surface S6 of the third lens and the object side surface S7 of the fourth lens, respectively. The object side surface and image side surface of the fourth spacer P4 partially abut against the image side surface S8 of the fourth lens and the object side surface S9 of the fifth lens, respectively. The object side surface and image side surface of the fifth spacer P5 partially abut against the image side surface S10 of the fifth lens and the object side surface S11 of the sixth lens, respectively. The object side surface and image side surface of the sixth spacer P6 partially abut against the image side surface S12 of the sixth lens and the object side surface S13 of the seventh lens, respectively. The object-side surface and the image-side surface of the seventh spacer P7 are in contact with the image-side surface S14 of the seventh lens and a portion of the inner wall surface of the lens barrel P0 , respectively.

[0121] like Fig.13As shown, when the optical imaging lens is in the second state, the supporting and abutting manner of each spacer is the same as that in the first state. Please refer to the relevant description in the first state and will not be repeated here.

[0122] like Fig.14 As shown, when the optical imaging lens is in the third state, the supporting and abutting manner of each spacer is the same as that in the first state. Please refer to the relevant description in the first state and will not be repeated here.

[0123] In summary, the structural parameters of the optical imaging lens of the third embodiment in the first state 3-1, the second state 3-2 and the third state 3-3 are shown in Table 7. (Unit: mm)

[0124]

[0125] Table 7

[0126] In Embodiment 3, the object side surface S1 of the first lens is a convex surface, and the image side surface S2 of the first lens is a concave surface. The object side surface S3 of the second lens is a concave surface, and the image side surface S4 of the second lens is a convex surface. The object side surface S5 of the third lens is a convex surface, and the image side surface S6 of the third lens is a concave surface. The object side surface S7 of the fourth lens is a concave surface, and the image side surface S8 of the fourth lens is a convex surface. The object side surface S9 of the fifth lens is a convex surface, and the image side surface S10 of the fifth lens is a convex surface. The object side surface S11 of the sixth lens is a convex surface, and the image side surface S12 of the sixth lens is a convex surface. The object side surface S13 of the seventh lens is a concave surface, and the image side surface S14 of the seventh lens is a convex surface.

[0127] In Example 3, the effective focal length f of the optical imaging lens is 2.18 mm, the effective focal length f1 of the first lens is -10.26 mm, the effective focal length f2 of the second lens is -8.83 mm, the effective focal length f3 of the third lens is 6.68 mm, the effective focal length f4 of the fourth lens is -1999.12 mm, the effective focal length f5 of the fifth lens is 3.10 mm, the effective focal length f6 of the sixth lens is 5.45 mm, the effective focal length f7 of the seventh lens is -6.68 mm, and the maximum semi-field angle semi-fov of the optical imaging lens is 101.20°.

[0128] Table 8 shows a basic structural parameter table of the optical imaging lens of Example 3, wherein the units of the radius of curvature and thickness / distance are all millimeters.

[0129]

[0130]

[0131] Table 8

[0132] Table 9 shows the polynomial coefficients that can be used for each aspheric mirror surface in the third embodiment, wherein each aspheric surface shape can be defined by the formula (1) given in the first embodiment above.

[0133] Face number A4 A6 A8 A10 A12 A14 A16 S3 8.0057E-02 1.2925E-02 -2.2724E-02 1.0163E-02 -2.4589E-03 3.3517E-04 -2.1787E-05 S4 -5.4610E-02 3.2238E-01 -4.5983E-01 4.8668E-01 -3.8944E-01 2.3376E-01 -1.0954E-01 S5 -1.4518E-01 3.1932E-01 -3.9874E-01 3.3916E-01 -1.9706E-01 7.8690E-02 -2.1490E-02 S6 -4.3116E-02 1.8539E-01 -3.7202E-01 5.3367E-01 -6.2119E-01 6.8781E-01 -7.6789E-01 S7 -1.3254E-01 3.8730E-01 -3.3061E+00 1.7035E+01 -6.0542E+01 1.4215E+02 -2.0882E+02 S8 -2.8808E-01 5.7335E-01 -1.9158E+00 4.0951E+00 -5.6939E+00 4.7961E+00 -1.5485E+00 S9 -1.7867E-01 3.7452E-01 -9.9693E-01 1.9830E+00 -2.9497E+00 3.2107E+00 -2.4865E+00 S10 -1.6297E-01 -8.0393E-02 6.0720E-01 -1.1693E+00 1.2760E+00 -9.4743E-01 5.2466E-01 S11 -1.4191E-01 2.7814E-01 -2.0573E+00 8.1524E+00 -1.9237E+01 2.9764E+01 -3.1730E+01 S12 1.8244E-01 -4.6476E-01 6.6075E-01 -6.6141E-01 5.4837E-01 -3.8006E-01 2.0518E-01 S13 9.8520E-01 -1.9021E+00 1.7808E+00 -9.4566E-01 3.0798E-01 -6.2500E-02 7.4855E-03 S14 1.1088E+00 -1.8913E+00 1.8764E+00 -1.2454E+00 5.7965E-01 -1.9246E-01 4.5733E-02 Face number A18 A20 A22 A24 A26 A28 A30 S3 1.0717E-07 2.0481E-08 7.3222E-09 -7.9232E-10 2.2992E-11 0.0000E+00 0.0000E+00 S4 4.3819E-02 -1.5711E-02 4.7074E-03 -1.0449E-03 1.5459E-04 -1.3500E-05 5.2959E-07 S5 3.7437E-03 -3.4161E-04 9.1837E-06 -9.2083E-09 0.0000E+00 0.0000E+00 0.0000E+00 S6 7.5796E-01 -5.7825E-01 3.1893E-01 -1.2208E-01 3.0750E-02 -4.5874E-03 3.0725E-04 S7 1.6981E+02 -5.0848E+01 -9.4038E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 S8 -1.0806E+00 1.2599E+00 -3.8199E-01 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 S9 1.3402E+00 -4.8916E-01 1.1505E-01 -1.5714E-02 9.4592E-04 0.0000E+00 0.0000E+00 S10 -2.2660E-01 7.5587E-02 -1.7661E-02 1.9442E-03 2.9234E-04 -1.3368E-04 1.4125E-05 S11 2.3827E+01 -1.2685E+01 4.7573E+00 -1.2286E+00 2.0798E-01 -2.0784E-02 9.2981E-04 S12 -8.2030E-02 2.3737E-02 -4.8909E-03 6.9925E-04 -6.5948E-05 3.6916E-06 -9.2938E-08 S13 -4.0345E-04 -1.2363E-05 2.9292E-06 -1.4054E-07 3.1796E-09 -1.0784E-10 0.0000E+00 S14 -7.7157E-03 9.0458E-04 -7.0725E-05 3.4368E-06 -9.4445E-08 1.6508E-09 -3.6243E-11

[0134] Table 9

[0135] Fig.15 The axial chromatic aberration curve of the optical imaging lens of the third embodiment is shown, which indicates the deviation of the focal point of light of different wavelengths after passing through the optical imaging lens. Fig.16 The astigmatism curve of the optical imaging lens of the third embodiment is shown, which represents the meridional image curvature and the sagittal image curvature.

[0136] according to Fig.15 and Fig.16 It can be seen that the optical imaging lens provided in the third embodiment can achieve good imaging quality.

[0137] In summary, Embodiments 1 to 3 respectively satisfy the relationship shown in Table 10.

[0138] Conditional / Example 1-1 1-2 1-3 2-1 2-2 2-3 3-1 3-2 3-3 f1 / EP01 -14.63 -9.29 -9.29 -20.54 -20.54 -20.01 -8.55 -8.55 -7.49 f1 / (D1s-d1s) -4.66 -4.74 -4.71 -10.14 -10.17 -11.59 -2.01 -2.06 -2.02 (D3m-d3m) / (f3-f4) -1.11 -1.07 -0.57 -0.66 -0.64 -0.36 0.00 0.00 0.00 D2s / R5-D3s / R6 3.16 3.15 2.33 3.65 3.63 2.74 2.33 2.30 2.32 D5s / f5-D4s / f4 0.81 0.82 0.81 2.24 2.24 2.19 3.88 3.86 3.44 EP34 / CT4 1.41 1.41 1.29 1.04 1.93 1.47 1.13 1.13 1.13 d3m / R7+d4s / R8 -0.31 -0.33 -0.29 -0.31 -0.33 -0.25 -0.15 -0.15 -0.16 EP56 / EP45 1.98 1.98 2.16 3.59 1.93 2.09 4.44 4.44 4.44 (EP56-EP45) / (f6-f5) -0.12 -0.12 -0.10 -1.29 -2.17 -0.57 0.39 0.39 0.39 CT5 / CT6 1.33 1.33 1.33 1.54 1.54 1.54 1.62 1.62 1.62 (d6s-d5s) / (d5s-d4s) 1.40 1.27 1.26 1.87 1.84 1.11 1.32 1.32 1.35 (R10+R11) / (D5m-d5m) -0.69 -0.70 -0.69 -0.01 -0.01 -0.01 0.04 0.04 0.04 d5s / f5-d6s / f6 -0.90 -0.87 -0.90 -0.66 -0.66 -0.68 0.21 0.21 0.20 D7m / TD 1.33 1.34 1.33 1.51 1.51 1.48 1.91 1.90 1.80 (D7s-d7s) / CT7 3.32 2.16 3.32 3.36 2.44 3.36 13.56 18.53 17.44 d7s / R14-d6s / R13 0.41 0.42 0.41 2.63 2.67 2.74 -0.30 0.75 0.77 f*tan(semi-fov) / L -1.32 -1.32 -1.32 -1.28 -1.28 -1.28 -1.69 -1.69 -1.64 d1s / R2 1.15 1.16 1.16 0.86 0.86 0.88 1.52 1.54 1.52 d2m / R4 1.99 2.01 1.95 2.29 2.29 2.27 -0.67 -0.69 -0.67

[0139] Table 10

[0140] It should be noted that, in Table 10, 1-1 represents the optical imaging lens in Example 1 in the first state, 1-2 represents the optical imaging lens in Example 1 in the second state, 1-3 represents the optical imaging lens in Example 1 in the third state, 2-1 represents the optical imaging lens in Example 2 in the first state, 2-2 represents the optical imaging lens in Example 2 in the second state, 2-3 represents the optical imaging lens in Example 2 in the third state, 3-1 represents the optical imaging lens in Example 3 in the first state, 3-2 represents the optical imaging lens in Example 3 in the second state, and 3-3 represents the optical imaging lens in Example 3 in the third state.

[0141] 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.

[0142] Obviously, the embodiments described above are only some embodiments of the utility model, not all embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the utility model.

[0143] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present application. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprise" and / or "include" are used in this specification, it indicates the presence of features, steps, operations, devices, components and / or combinations thereof.

[0144] It should be noted that the terms "first", "second", etc. in the specification and claims of the present application and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the numbers used in this way can be interchanged where appropriate, so that the embodiments of the present application described herein can be implemented in an order other than those illustrated or described herein.

[0145] The above description is only the preferred embodiment of the utility model, and is not intended to limit the utility model. For those skilled in the art, the utility model can have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model shall be included in the protection scope of the utility model.

Claims

1. An optical imaging lens, characterized in that: It includes a lens barrel, a lens group and a plurality of spacers disposed in the lens barrel. The lens barrel has an object-side end face and an image-side end face. The lens group includes 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, and there is an air gap between two adjacent lenses among the first lens to the seventh lens. The plurality of spacers include a first spacer located between the first lens and the second lens, a second spacer located between the second lens and the third lens, a third spacer located between the third lens and the fourth lens, a fourth spacer located between the fourth lens and the fifth lens, a fifth spacer located between the fifth lens and the sixth lens, a sixth spacer located between the sixth lens and the seventh lens, and a seventh spacer located on the image side of the seventh lens. When the following conditions are satisfied: -25 < f1 / EP01 < -5, where f1 is the effective focal length of the first lens and EP01 is the on-axis distance from the object-side end face of the lens barrel to the object-side surface of the first spacer; and 100° < semi-fov < 110°, where semi-fov is the maximum half field of view of the optical imaging lens. The following conditions are satisfied: 0 < d1s / R2 < 2, where d1s is the inner diameter of the object-side surface of the first spacer and R2 is the curvature radius of the image-side surface of the first lens; and -1 < d2m / R4 < 3, where d2m is the inner diameter of the image-side surface of the second spacer and R4 is the curvature radius of the image-side surface of the second lens.

2. The optical imaging lens according to claim 1, wherein: When the Abbe number V1 of the first lens satisfies: 80 < V1 < 82, the following condition is satisfied: -12 < f1 / (D1s - d1s) < -2, where f1 is the effective focal length of the first lens, d1s is the inner diameter of the object-side surface of the first spacer, and D1s is the outer diameter of the object-side surface of the first spacer.

3. The optical imaging lens according to claim 1, wherein: Among the first spacer to the seventh spacer, the third spacer has the smallest inner diameter; and the following condition is satisfied: -2 < (D3m - d3m) / (f3 - f4) < 0.1, where f3 is the effective focal length of the third lens, f4 is the effective focal length of the fourth lens, d3m is the inner diameter of the image-side surface of the third spacer, and D3m is the outer diameter of the image-side surface of the third spacer.

4. The optical imaging lens according to claim 1, wherein: The following condition is satisfied: 2 < D2s / R5 - D3s / R6 < 4, where D2s is the outer diameter of the object-side surface of the second spacer, D3s is the outer diameter of the object-side surface of the third spacer, R5 is the curvature radius of the object-side surface of the third lens, and R6 is the curvature radius of the image-side surface of the third lens.

5. The optical imaging lens according to claim 1, wherein: The following condition is satisfied: 0 < D5s / f5 - D4s / f4 < 5, where f4 is the effective focal length of the fourth lens, f5 is the effective focal length of the fifth lens, D4s is the outer diameter of the object-side surface of the fourth spacer, and D5s is the outer diameter of the object-side surface of the fifth spacer.

6. The optical imaging lens according to claim 1, wherein: When the axial distance EP34 from the image side of the third spacer to the object side of the fourth spacer and the central thickness CT4 of the fourth lens satisfy: 1 < EP34 / CT4 < 2, the inner diameter d3m of the image side of the third spacer, the inner diameter d4s of the object side of the fourth spacer, the curvature radius R7 of the object side of the fourth lens, and the curvature radius R8 of the image side of the fourth lens satisfy: -0.5 < d3m / R7 + d4s / R8 < 0.

7. The optical imaging lens according to claim 1, wherein: When the axial distance EP45 from the image side of the fourth spacer to the object side of the fifth spacer and the axial distance EP56 from the image side of the fifth spacer to the object side of the sixth spacer satisfy: 1.5 < EP56 / EP45 < 5, the axial distance EP56 from the image side of the fifth spacer to the object side of the sixth spacer, the axial distance EP45 from the image side of the fourth spacer to the object side of the fifth spacer, the effective focal length f5 of the fifth lens, and the effective focal length f6 of the sixth lens satisfy: -3 < (EP56 - EP45) / (f6 - f5) < 1.

8. The optical imaging lens according to claim 1, wherein: When the central thickness CT5 of the fifth lens and the central thickness CT6 of the sixth lens satisfy: 1.2 < CT5 / CT6 < 1.7, the inner diameter d4s of the object side of the fourth spacer, the inner diameter d5s of the object side of the fifth spacer, and the inner diameter d6s of the object side of the sixth spacer satisfy: 1 < (d6s - d5s) / (d5s - d4s) < 2.

9. The optical imaging lens according to claim 1, wherein: The inner diameter d5m of the image side of the fifth spacer, the outer diameter D5m of the image side of the fifth spacer, the curvature radius R10 of the image side of the fifth lens, and the curvature radius R11 of the object side of the sixth lens satisfy: -1 < (R10 + R11) / (D5m - d5m) < 0.

1.

10. The optical imaging lens according to claim 1, wherein: The inner diameter d5s of the object side of the fifth spacer, the inner diameter d6s of the object side of the sixth spacer, the effective focal length f5 of the fifth lens, and the effective focal length f6 of the sixth lens satisfy: -1 < d5s / f5 - d6s / f6 < 0.

5.

11. The optical imaging lens according to claim 1, wherein: Among the first spacer to the seventh spacer, the outer diameter of the image side of the seventh spacer is the largest; and the outer diameter D7m of the image side of the seventh spacer and the distance TD on the optical axis from the object side of the first lens to the image side of the seventh lens satisfy: 1 < D7m / TD < 2.

12. The optical imaging lens according to claim 1, wherein: The inner diameter d7s of the object side of the seventh spacer, the outer diameter D7s of the object side of the seventh spacer, and the central thickness CT7 of the seventh lens satisfy: 2 < (D7s - d7s) / CT7 < 20.

13. The optical imaging lens according to claim 1, wherein: The inner diameter d6s of the object side of the sixth spacer, the inner diameter d7s of the object side of the seventh spacer, the curvature radius R13 of the object side of the seventh lens, and the curvature radius R14 of the image side of the seventh lens satisfy: -1 < d7s / R14 - d6s / R13 < 3.

14. The optical imaging lens according to any one of claims 1 to 13, characterized in that: The effective focal length f of the optical imaging lens, the maximum half field angle semi-fov of the optical imaging lens and the height L of the lens barrel satisfy the following conditions: <f*tan(semi-fov) / L<-1。

Images