Optical imaging lens

Abstract

The utility model provides an optical imaging lens. The optical imaging lens comprises a first lens to an eighth lens. A plurality of spacer elements; a lens barrel; the effective focal length f of the optical imaging lens and the half Semi-FOV of the maximum field angle of the optical imaging lens meet the following condition: 0.6 lt; f / TAN (Semi-FOV) lt; 0.9, 0.9; the external diameter D2s of the object side surface of the second spacing element and the effective half aperture DT32 of the image side surface of the third lens satisfy 3.5 lt; d < 2s > / D < T32 < lt >; 6.2); the outer diameter D6m of the image side surface of the sixth spacing element and the outer diameter D5m of the image side surface of the fifth spacing element meet the following conditions: 1.0 lt; d < 6 > m / D < 5 > mlt; 1.7, 1.7; the sum Sigma CP2 of the maximum thicknesses of all spacing elements between the second lens and the third lens, the sum Sigma CP6 of the maximum thicknesses of all spacing elements between the sixth lens and the seventh lens, the air interval T23 of the second lens and the third lens on the optical axis, and the air interval T67 of the sixth lens and the seventh lens on the optical axis meet the following conditions: 2.2 lt; (Sigma CP2 + Sigma CP6) / (T23 + T67) lt; and 3.7. According to the utility model, the problem of poor stability of the optical imaging lens assembly in the prior art is solved.

Description

Technical Field

[0001] The utility model relates to an optical imaging lens, in particular to an optical lens composed of eight lenses. Background Art

[0002] With the continuous development of the XR industry in recent years, related consumer electronic products have shown an increasingly diversified development trend; as an important medium for obtaining information, the application field of optical imaging lenses has been continuously expanded and deepened, and the requirements for product technical levels have also increased accordingly, developing in the direction of lightness, thinness and high quality. With the continuous iteration and functional upgrade of terminal products such as "sports cameras", the requirements for the performance of the main camera lenses have gradually increased. For eight-piece ultra-wide-angle optical imaging lenses, due to the large number of lenses and their different shapes, it is easy to have a large radial segment difference between adjacent lenses, resulting in poor stability during the assembly process, causing a large offset of the image plane, unstable MTF, and poor imaging quality. Therefore, how to control the lens aperture, spacing, outer diameter, thickness and other dimensions of the spacing element of the optical imaging lens to improve assembly stability and imaging quality while ensuring an ultra-wide angle is a very important issue. Utility Model Content

[0003] The main purpose of the utility model is to provide an optical imaging lens to solve the problem of poor assembly stability of the optical imaging lens in the prior art.

[0004] To achieve the above object, according to one aspect of the present invention, there is provided an optical imaging lens having eight lenses with optical power. The optical imaging lens includes: a first lens to an eighth lens arranged in sequence from the object side to the image side of the optical imaging lens; a plurality of spacer elements, at least including a second spacer element located between the second lens and the third lens and at least partially in contact with the image side surface of the second lens, a fifth spacer element located between the fifth lens and the sixth lens and at least partially in contact with the image side surface of the fifth lens, and a sixth spacer element located between the sixth lens and the seventh lens and at least partially in contact with the image side surface of the sixth lens; a lens barrel, all the lenses and the plurality of spacer elements are accommodated in the lens barrel; wherein, the effective focal length f of the optical imaging lens and half of the maximum field of view angle Semi-FOV of the optical imaging lens satisfy: 0.6 < f / TAN(Semi-FOV) < 0.9; the outer diameter D2s of the object side surface of the second spacer element and the effective semi-aperture DT32 of the image side surface of the third lens satisfy: 3.5 < D2s / DT32 < 6.2; the outer diameter D6m of the image side surface of the sixth spacer element and the outer diameter D5m of the image side surface of the fifth spacer element satisfy: 1.0 < D6m / D5m < 1.7; the sum ∑CP2 of the maximum thicknesses of all the spacer elements between the second lens and the third lens, the sum ∑CP6 of the maximum thicknesses of all the spacer elements between the sixth lens and the seventh lens, the air gap T23 between the second lens and the third lens on the optical axis of the optical imaging lens, and the air gap T67 between the sixth lens and the seventh lens on the optical axis satisfy: 2.2 < (∑CP2 + ∑CP6) / (T23 + T67) < 3.7.

[0005] According to another aspect of the present utility model, an optical imaging lens is provided. The number of lenses with optical power in the optical imaging lens is eight. The optical imaging lens includes: a first lens to an eighth lens arranged in sequence from the object side to the image side of the optical imaging lens. The first lens has a negative optical power, the second lens has a positive optical power, the fourth lens has a negative optical power, the fifth lens has a positive optical power, the sixth lens has a negative optical power, the seventh lens has a positive optical power, the eighth lens has a negative optical power, and the image side surface of the eighth lens has at least one inflection point; a plurality of spacer elements, at least including a sixth spacer element located between the sixth lens and the seventh lens and at least partially in contact with the image side surface of the sixth lens, and a seventh spacer element located between the seventh lens and the eighth lens and at least partially in contact with the image side surface of the seventh lens; a lens barrel, and all the lenses and the plurality of spacer elements are accommodated in the lens barrel; wherein, between the effective focal length f of the optical imaging lens and half of the maximum field of view angle Semi-FOV of the optical imaging lens, it satisfies: 0.6 < f / TAN(Semi-FOV) < 0.9; between the effective focal length f6 of the sixth lens and the effective focal length f7 of the seventh lens, it satisfies: -1.9 < f6 / f7 < -1.0; between the maximum thickness CP6 of the sixth spacer element, the inner diameter d7s of the object side surface of the seventh spacer element, and the inner diameter d6s of the object side surface of the sixth spacer element, it satisfies: 0.1 < CP6 / (d7s - d6s) < 0.5. The present application provides an eight-piece optical imaging lens, which satisfies the characteristics of a large field of view angle and satisfies 0.6 < f / TAN(Semi-FOV) < 0.9. However, due to the structural feature that the front end of the optical imaging lens of the present application is large and the rear end is small, stray light is likely to be generated at the rear end of the optical imaging lens. By controlling the focal lengths of the sixth and seventh lenses, and the thicknesses and inner diameters of the sixth and seventh spacer elements, the refraction direction of the chief ray at the rear end of the optical imaging lens is controlled, ensuring that the image height of the imaging light rays in each field of view reaches the ideal position, and at the same time suppressing the internal stray light and transmitted stray light generated between the sixth lens and the seventh lens, thereby improving the imaging quality.

[0006] Further, the central thickness of the second lens is the largest among the central thicknesses of all the lenses. The plurality of spacer elements further includes a first spacer element located between the first lens and the second lens and at least partially in contact with the image side surface of the first lens. Between the air gap T12 on the optical axis between the first lens and the second lens, the central thickness CT2 of the second lens, the maximum thickness CP1 of the first spacer element, and the sum ∑CP2 of the maximum thicknesses of all the spacer elements between the second lens and the third lens, it satisfies: 3.6 < (T12 + CT2) / (CP1 + ∑CP2) < 4.6.

[0007] Further, the inner diameter d0m of the image-side end face of the lens barrel, the entrance pupil diameter EPD of the optical imaging lens, and half of the maximum field of view angle Semi-FOV of the optical imaging lens satisfy: 433.5° < d0m / EPD * Semi-FOV < 492.1°.

[0008] Further, the plurality of spacer elements further include a first spacer element located between the first lens and the second lens and at least partially in contact with the image side face of the first lens, and a fourth spacer element located between the fourth lens and the fifth lens and at least partially in contact with the image side face of the fourth lens. The outer diameter D1m of the image side face of the first spacer element, the outer diameter D4s of the object side face of the fourth spacer element, and the distance Dr1r8 on the optical axis from the object side face of the first lens to the image side face of the fourth lens satisfy: 1.0 < (D1m - D4s) / Dr1r8 < 1.2.

[0009] Further, the outer diameter D0s of the object-side end face of the lens barrel, the minimum outer diameter dmin of the lens barrel, and the outer diameter D0m of the image-side end face of the lens barrel satisfy: 2.3 < (D0s - dmin) / (D0m - dmin) < 2.8.

[0010] Further, the plurality of spacer elements further include a fourth spacer element located between the fourth lens and the fifth lens and at least partially in contact with the image side face of the fourth lens. The radius of curvature R11 of the object side face of the sixth lens, the radius of curvature R9 of the object side face of the fifth lens, and the radius of curvature R10 of the image side face of the fifth lens satisfy: 1.5 < R11 / (R9 + R10) < 2.0. The axial spacing distance EP56 between the fifth spacer element and the sixth spacer element and the axial spacing distance EP45 between the fourth spacer element and the fifth spacer element satisfy: 1.1 < EP56 / EP45 < 1.8.

[0011] Further, the distance TD on the optical axis from the object side face of the first lens to the image side face of the eighth lens, the outer diameter D0s of the object-side end face of the lens barrel, and the outer diameter D0m of the image-side end face of the lens barrel satisfy: 1.7 < TD / (D0s - D0m) < 2.1.

[0012] Further, the plurality of spacer elements further include a fourth spacer element located between the fourth lens and the fifth lens and at least partially in contact with the image side face of the fourth lens. The combined focal length f12 of the first lens and the second lens, and the combined focal length f456 of the fourth lens, the fifth lens, and the sixth lens satisfy: 1.8 < f12 / f456 < 2.4. The outer diameter D2m of the image side face of the second spacer element and the outer diameter D4s of the object side face of the fourth spacer element satisfy: 1.7 < D2m / D4s < 3.4.

[0013] Furthermore, the multiple spacer elements further include a fourth spacer element located between the fourth lens and the fifth lens and at least partially in contact with the image side surface of the fourth lens, and a seventh spacer element located between the seventh lens and the eighth lens and at least partially in contact with the image side surface of the seventh lens. The effective focal length f4 of the fourth lens, the effective focal length f7 of the seventh lens, the outer diameter D7s of the object side surface of the seventh spacer element, and the outer diameter D4m of the image side surface of the fourth spacer element satisfy: -0.5 < (f4 + f7) / (D7s - D4m) < 0.5.

[0014] Furthermore, the maximum height L of the lens barrel, the central thickness CT4 of the fourth lens, the central thickness CT5 of the fifth lens, and the central thickness CT6 of the sixth lens satisfy: 14.5 < L / (CT4 + CT5 + CT6) < 15.7.

[0015] Furthermore, the multiple spacer elements further include a first spacer element located between the first lens and the second lens and at least partially in contact with the image side surface of the first lens. The combined focal length f12 of the first lens and the second lens and the effective focal length f of the optical imaging lens satisfy: -9.0 < f12 / f < -7.3. The maximum height L of the lens barrel, the axial spacing distance EP01 from the object side end surface of the lens barrel to the object side surface of the first spacer element, and the spacing distance EP12 between the first spacer element and the second spacer element satisfy: 1.7 < L / (EP01 + EP12) < 2.0.

[0016] Furthermore, the multiple spacer elements further include a first spacer element located between the first lens and the second lens and at least partially in contact with the image side surface of the first lens. The spacing distance EP12 between the first spacer element and the second spacer element, the air gap T12 between the first lens and the second lens on the optical axis, and the air gap T23 between the second lens and the third lens on the optical axis satisfy: 1.0 < EP12 / (T12 + T23) < 1.4.

[0017] Furthermore, the multiple spacer elements further include a first spacer element located between the first lens and the second lens and at least partially in contact with the image side surface of the first lens. The effective focal length f2 of the second lens and the effective focal length f1 of the first lens satisfy: -3.5 < f2 / f1 < -2.9. The inner diameter d1m of the image side surface of the first spacer element and the inner diameter d2s of the object side surface of the second spacer element satisfy: 1.1 < d1m / d2s < 1.4.

[0018] Further, the plurality of spacer elements further includes a seventh spacer element located between the seventh lens and the eighth lens and at least partially contacting the image side surface of the seventh lens. The effective focal length f6 of the sixth lens and the effective focal length f7 of the seventh lens satisfy: -1.9 < f6 / f7 < -1.0. The maximum thickness CP6 of the sixth spacer element, the inner diameter d7s of the object side surface of the seventh spacer element, and the inner diameter d6s of the object side surface of the sixth spacer element satisfy: 0.1 < CP6 / (d7s - d6s) < 0.5.

[0019] Further, the plurality of spacer elements further includes a fourth spacer element located between the fourth lens and the fifth lens and at least partially contacting the image side surface of the fourth lens. The combined focal length f456 of the fourth lens, the fifth lens, and the sixth lens, the spacer distance EP45 between the fourth spacer element and the fifth spacer element, and the spacer distance EP56 between the fifth spacer element and the sixth spacer element satisfy: -15.1 < f456 / (EP45 + EP56) < -12.1.

[0020] Further, the maximum outer diameter OD2 of the second lens and the maximum outer diameter OD3 of the third lens satisfy: 1.9 < OD2 / OD3 < 2.3. The maximum outer diameter OD7 of the seventh lens and the maximum outer diameter OD6 of the sixth lens satisfy: 1.3 < OD7 / OD6 < 1.8.

[0021] Further, along the direction from the object side to the image side of the optical imaging lens, the distance between the outer ring surface of the lens barrel and the optical axis first decreases and then increases. At the position where the distance between the outer ring surface and the optical axis is the smallest, there are a plurality of reinforcing structures extending away from the optical axis. The plurality of reinforcing structures are arranged at intervals around the circumferential direction of the lens barrel.

[0022] Applying the technical solution of the present utility model, the optical imaging lens includes: a first lens to an eighth lens arranged in sequence from the object side to the image side of the optical imaging lens; a plurality of spacer elements, at least including a second spacer element located between the second lens and the third lens and at least partially contacting the image side surface of the second lens, a fifth spacer element located between the fifth lens and the sixth lens and at least partially contacting the image side surface of the fifth lens, and a sixth spacer element located between the sixth lens and the seventh lens and at least partially contacting the image side surface of the sixth lens; a lens barrel, and all the lenses and the plurality of spacer elements are accommodated in the lens barrel; wherein, between the effective focal length f of the optical imaging lens and half of the maximum field of view angle Semi - FOV of the optical imaging lens, it satisfies: 0.6 < f / TAN(Semi - FOV) < 0.9; between the outer diameter D2s of the object side surface of the second spacer element and the effective semi - aperture DT32 of the image side surface of the third lens, it satisfies: 3.5 < D2s / DT32 < 6.2; between the outer diameter D6m of the image side surface of the sixth spacer element and the outer diameter D5m of the image side surface of the fifth spacer element, it satisfies: 1.0 < D6m / D5m < 1.7; between the sum ∑CP2 of the maximum thicknesses of all the spacer elements between the second lens and the third lens, the sum ∑CP6 of the maximum thicknesses of all the spacer elements between the sixth lens and the seventh lens, the air gap T23 between the second lens and the third lens on the optical axis of the optical imaging lens, and the air gap T67 between the sixth lens and the seventh lens on the optical axis, it satisfies: 2.2 < (∑CP2 + ∑CP6) / (T23 + T67) < 3.7.

[0023] This application is an eight - element optical imaging lens. In order to meet the characteristics of ultra - wide angle, the field of view angle and the effective focal length satisfy 0.6 < f / TAN(Semi - FOV) < 0.9. At the same time, the outer diameter of the object side surface of the second spacer element and the effective semi - aperture of the image side surface of the third lens satisfy 3.5 < D2s / DT32 < 6.2, and the outer diameter of the image side surface of the sixth spacer element and the outer diameter of the image side surface of the fifth spacer element satisfy 1.0 < D6m / D5m < 1.7. Since D2s is close to the outer diameter of the second lens, DT32 is the effective semi - aperture of the image side surface of the third lens, D6m is close to the outer diameter of the seventh lens, and D5m is close to the outer diameter of the sixth lens, it can be seen from the ratio that there is a large radial step difference between the second lens and the third lens, and between the sixth lens and the seventh lens. This makes it easy to have problems such as unstable assembly during the lens installation process, resulting in a large deviation of the image plane, unstable MTF, and poor imaging quality. In order to ensure the assembly stability and the defocus curve meets the requirements, this application reasonably sets the thickness of the spacer elements in the air gaps between the second and third lenses and between the sixth and seventh lenses, which is beneficial to controlling the edge thickness of the third lens and the seventh lens within a reasonable range, making the peak value of the defocus curve and the field curvature stable, improving the MTF yield of the optical imaging lens, and the optical imaging lens has high imaging quality. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] The drawings constituting part of the present application are used to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation on the present invention. In the drawings:

[0025] Figure 1 to Figure 2 Schematic diagrams of parameters of an optional embodiment of the utility model are respectively shown;

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

[0027] Figures 4 to 7 The axial chromatic aberration curve, astigmatism curve, distortion curve and magnification chromatic aberration curve of the first embodiment of the utility model are respectively shown;

[0028] Figure 8 A schematic structural diagram of an optical imaging lens according to a second embodiment of the present utility model is shown;

[0029] Fig. 9 A schematic structural diagram of an optical imaging lens according to a third embodiment of the present utility model is shown;

[0030] Figures 10 to 13 The axial chromatic aberration curve, astigmatism curve, distortion curve and magnification chromatic aberration curve of the third embodiment of the utility model are respectively shown;

[0031] Fig.14 A schematic structural diagram of an optical imaging lens according to a fourth embodiment of the present utility model is shown;

[0032] Fig.15 A schematic structural diagram of an optical imaging lens according to a fifth embodiment of the present utility model is shown;

[0033] Figures 16 to 19 The axial chromatic aberration curve, astigmatism curve, distortion curve and magnification chromatic aberration curve of the fifth embodiment of the utility model are respectively shown;

[0034] Fig. 20 A schematic structural diagram of an optical imaging lens according to a sixth embodiment of the present utility model is shown;

[0035] Fig.21 The figure shows a schematic structural diagram of an optical imaging lens according to a seventh embodiment of the present utility model;

[0036] Figure 22 to Figure 25 The axial chromatic aberration curve, astigmatism curve, distortion curve and magnification chromatic aberration curve of the seventh embodiment of the utility model are respectively shown;

[0037] Fig.26Shows a schematic structural diagram of the optical imaging lens according to the eighth embodiment of the present utility model;

[0038] Fig. 27 Shows an enlarged schematic diagram of the strengthening structure according to an alternative embodiment of the present utility model;

[0039] Fig.28 Shows Fig. 27 The 3D schematic diagram of the strengthening structure in

[0040] Fig.29 Shows a partial structural schematic diagram of an optical imaging lens of the present utility model under the conditions of 0.6 < f / TAN(Semi-FOV) < 0.9, 3.5 < D2s / DT32 < 6.2, 1.0 < D6m / D5m < 1.7, and 2.2 < (∑CP2 + ∑CP6) / (T23 + T67) < 3.7;

[0041] Fig.30 Shows Fig.29 The corresponding MTF curve of the optical imaging lens in

[0042] Fig.31 Shows a partial structural schematic diagram of an optical imaging lens of the present utility model under the conditions of 0.6 < f / TAN(Semi-FOV) < 0.9, 3.5 < D2s / DT32 < 6.2, 1.0 < D6m / D5m < 1.7, and 2.2 < (∑CP2 + ∑CP6) / (T23 + T67) < 3.7;

[0043] Fig.32 Shows Fig.31 The corresponding MTF curve of the optical imaging lens in

[0044] Fig.33 Shows a schematic diagram of DT32 according to an alternative embodiment of the present utility model;

[0045] Fig.34 Shows a partial structural schematic diagram of an optical imaging lens in the prior art under the conditions of 0.6 < f / TAN(Semi-FOV) < 0.9, 3.5 < D2s / DT32 < 6.2, 1.0 < D6m / D5m < 1.7, and (∑CP2 + ∑CP6) / (T23 + T67) < 2.2;

[0046] Fig.35 Shows Fig.34 The corresponding MTF curve of the optical imaging lens in

[0047] Fig.36Shows a partial structural schematic diagram of an optical imaging lens in the prior art under the conditions of 0.6 < f / TAN(Semi - FOV) < 0.9, 3.5 < D2s / DT32 < 6.2, 1.0 < D6m / D5m < 1.7, and 3.7 < (∑CP2 + ∑CP6) / (T23 + T67);

[0048] Fig.37 Shows Fig.36 the MTF curve corresponding to the optical imaging lens in

[0049] Among them, the above - mentioned drawings include the following reference numerals:

[0050] 10. Reinforcing structure; P0. Barrel; E1. First lens; S1. Object side of the first lens; S2. Image side of the first lens; P1. First spacer element; E2. Second lens; S3. Object side of the second lens; S4. Image side of the second lens; P2. Second spacer element; P2b. Second auxiliary spacer element; E3. Third lens; S5. Object side of the third lens; S6. Image side of the third lens; E4. Fourth lens; S7. Object side of the fourth lens; S8. Image side of the fourth lens; P4. Fourth spacer element; E5. Fifth lens; S9. Object side of the fifth lens; S10. Image side of the fifth lens; P5. Fifth spacer element; E6. Sixth lens; S11. Object side of the sixth lens; S12. Image side of the sixth lens; P6. Sixth spacer element; P6b. Sixth auxiliary spacer element; E7. Seventh lens; S13. Object side of the seventh lens; S14. Image side of the seventh lens; P7. Seventh spacer element; P7b. Seventh auxiliary spacer element; E8. Eighth lens; S15. Object side of the eighth lens; S16. Image side of the eighth lens. Detailed implementation manners

[0051] It should be noted that, without conflict, the embodiments and features in the embodiments of the present application can be combined with each other. The following will describe the present invention in detail with reference to the drawings and in combination with the embodiments.

[0052] It should be pointed out that, unless otherwise specified, all technical and scientific terms used in the present application have the same meaning as commonly understood by those of ordinary skill in the technical field to which the present application belongs.

[0053] In the present invention, unless otherwise stated, the orientation terms such as "upper, lower, top, bottom" are usually in the direction shown in the drawings, or in the vertical, perpendicular or gravitational direction of the component itself; similarly, for the sake of easy understanding and description, "inner, outer" refer to the inner and outer relative to the contour of each component itself, but the above orientation terms do not limit the present invention.

[0054] 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.

[0055] 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.

[0056] In this article, the paraxial region refers to the region near the optical axis. If the lens surface is convex and the position of the convex surface is not defined, it means that the lens surface is convex at least in the paraxial region; if the lens surface is concave and the position of the concave surface is not defined, it means that the lens surface is concave at least in the paraxial region. The surface of each lens close to the object side is called the object side surface of the lens, and the surface of each lens close to the image side is called the image side surface of the lens. The judgment of the surface shape in the paraxial region can be based on the judgment method of the general knowledge in this field, and the positive and negative R value (R refers to the radius of curvature of the paraxial region, usually refers to the R value on the lens database (lens data) in the optical software) is used to judge the concave and convex. For the object 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 image 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.

[0057] In order to solve the problem of poor assembly stability of an optical imaging lens, the utility model provides an optical imaging lens.

[0058] First embodiment

[0059] like Figures 1 to 33As shown in the figure, the optical imaging lens includes a first lens to an eighth lens arranged in sequence from the object side to the image side of the optical imaging lens, a plurality of spacer elements, and a lens barrel. At least the second spacer element located between the second lens and the third lens and at least partially in contact with the image side surface of the second lens, the fifth spacer element located between the fifth lens and the sixth lens and at least partially in contact with the image side surface of the fifth lens, and the sixth spacer element located between the sixth lens and the seventh lens and at least partially in contact with the image side surface of the sixth lens are included in the plurality of spacer elements; all the lenses and the plurality of spacer elements are accommodated in the lens barrel; wherein, the effective focal length f of the optical imaging lens and half of the maximum field of view angle Semi-FOV of the optical imaging lens satisfy: 0.6 < f / TAN(Semi-FOV) < 0.9; the outer diameter D2s of the object side surface of the second spacer element and the effective semi-aperture DT32 of the image side surface of the third lens satisfy: 3.5 < D2s / DT32 < 6.2; the outer diameter D6m of the image side surface of the sixth spacer element and the outer diameter D5m of the image side surface of the fifth spacer element satisfy: 1.0 < D6m / D5m < 1.7; the sum of the maximum thicknesses ∑CP2 of all the spacer elements between the second lens and the third lens, the sum of the maximum thicknesses ∑CP6 of all the spacer elements between the sixth lens and the seventh lens, the air gap T23 between the second lens and the third lens on the optical axis of the optical imaging lens, and the air gap T67 between the sixth lens and the seventh lens on the optical axis satisfy: 2.2 < (∑CP2 + ∑CP6) / (T23 + T67) < 3.7.

[0060] This application is an eight-element optical imaging lens. In order to meet the characteristics of an ultra-wide angle, the field of view angle and the effective focal length satisfy 0.6 < f / TAN(Semi-FOV) < 0.9. At the same time, the outer diameter of the object side surface of the second spacer element and the effective semi-aperture of the image side surface of the third lens satisfy 3.5 < D2s / DT32 < 6.2, and the outer diameter of the image side surface of the sixth spacer element and the outer diameter of the image side surface of the fifth spacer element satisfy 1.0 < D6m / D5m < 1.7. Since D2s is close to the outer diameter size of the second lens, DT32 is the effective semi-aperture of the image side surface of the third lens, D6m is close to the outer diameter size of the seventh lens, and D5m is close to the outer diameter size of the sixth lens, it can be seen from the ratio that there is a large radial step difference between the second lens and the third lens, and between the sixth lens and the seventh lens. This makes it easy to have problems with unstable assembly during the lens installation process, causing a large shift in the image plane, unstable MTF, and poor imaging quality. In order to ensure the assembly stability and the defocus curve meets the requirements in this application, the thickness of the spacer elements is reasonably set in the air gaps between the second and third lenses, and between the sixth and seventh lenses, which is beneficial to controlling the edge thickness of the third lens and the seventh lens within a reasonable range, making the peak value of the defocus curve and the field curvature stable, improving the MTF yield of the optical imaging lens, and the optical imaging lens has high imaging quality.

[0061] Preferably, 0.70 <f / TAN(Semi-FOV)<0.85。

[0062] Preferably, 3.6 <D2s / DT32<6.1。

[0063] Preferably, 1.10 <D6m / D5m<1.65

[0064] Preferably, 2.25<(ΣCP2+ΣCP6) / (T23+T67)<3.6.

[0065] Table 1 below shows a comparison between the optical imaging lens of the present application and the optical imaging lens in the prior art.

[0066]

[0067]

[0068] Table 1

[0069] As shown in Table 1, lens 3 and lens 4 provide optical imaging lenses in the prior art. Figure 34 to Figure 37 None of them meet the range of 2.2<(∑CP2+∑CP6) / (T23+T67)<3.7 of the present application. Among them, the sum of the thickness of all the spacer elements between the second and third lenses of lens 3 and the sum of the thickness of all the spacer elements between the sixth and seventh lenses are too small, resulting in too large an object side draft angle of the third lens and the seventh lens, causing poor lens demolding, and the excessive surface PV value affects the drop of the defocus curve peak. The sum of the thickness of all the spacer elements between the second and third lenses of lens 4 and the sum of the thickness of all the spacer elements between the sixth and seventh lenses are too large, resulting in too small edge thickness of the third lens and the seventh lens, insufficient length for matching with the lens barrel, insufficient lens strength, and a high risk of assembly deformation, resulting in changes in the air gap, which affects the field curvature offset of the defocus curve. In other words, lens 3 and lens 4 cannot meet the requirements of assembly stability and MTF.

[0070] It should be noted that in order to more clearly show the spacing element in the middle of the lens, Fig.34 and Fig.36 A partial structural schematic diagram of lens 3 and lens 4 is given.

[0071] The lens 1 and lens 2 provided in this application are as follows: Figure 29 to Figure 32As shown, under the conditions of controlling 0.6 < f / TAN(Semi-FOV) < 0.9, 3.5 < D2s / DT32 < 6.2, 1.0 < D6m / D5m < 1.7, and 2.2 < (∑CP2 + ∑CP6) / (T23 + T67) < 3.7, the edge thicknesses of the third lens and the seventh lens are within a reasonable range, the lens shape is more reasonable, it provides sufficient stable support in cooperation with the lens barrel, reduces the risk of assembly deformation, stabilizes the peak value of the defocus curve and the field curvature, the MTF yield meets the requirements, and the optical imaging lens has high imaging quality.

[0072] In this embodiment, the central thickness of the second lens is the largest among the central thicknesses of all lenses. The plurality of spacer elements further includes a first spacer element located between the first lens and the second lens and at least partially in contact with the image side surface of the first lens. The air gap T12 between the first lens and the second lens on the optical axis, the central thickness CT2 of the second lens, the maximum thickness CP1 of the first spacer element, and the sum ∑CP2 of the maximum thicknesses of all spacer elements between the second lens and the third lens satisfy: 3.6 < (T12 + CT2) / (CP1 + ∑CP2) < 4.6. By restricting (T12 + CT2) / (CP1 + ∑CP2) within a reasonable range, the space occupation ratio of the first lens and the second lens in the optical imaging lens is relatively close to the space occupied by the third lens to the eighth lens. By controlling the air gap between the first lens and the second lens on the optical axis, the central thickness of the second lens, and the maximum thicknesses of the first spacer element and the second spacer element, it is beneficial to the abutting stability between the first and second lenses and between the second lens and the lenses on its image side, and reduces the influence of sensitivity.

[0073] In this embodiment, the inner diameter d0m of the image side end surface of the lens barrel, the entrance pupil diameter EPD of the optical imaging lens, and the half Semi-FOV of the maximum field of view angle of the optical imaging lens satisfy: 433.5° < d0m / EPD*Semi-FOV < 492.1°. By controlling d0m / EPD*Semi-FOV within a reasonable range, the entrance pupil diameter and the size of the field of view angle of the optical imaging lens can be effectively guaranteed, so as to ensure that the optical imaging lens has sufficient light input, the image side end surface of the lens barrel does not block the effective light, and the technical characteristics of large aperture and large field of view angle of the optical imaging lens are satisfied. Preferably, 433.6° < d0m / EPD*Semi-FOV < 492.0°.

[0074] In this embodiment, the plurality of spacer elements further include a first spacer element located between the first lens and the second lens and at least partially in contact with the image side surface of the first lens, and a fourth spacer element located between the fourth lens and the fifth lens and at least partially in contact with the image side surface of the fourth lens. The outer diameter D1m of the image side surface of the first spacer element, the outer diameter D4s of the object side surface of the fourth spacer element, and the distance Dr1r8 on the optical axis from the object side surface of the first lens to the image side surface of the fourth lens satisfy: 1.0 < (D1m - D4s) / Dr1r8 < 1.2. Due to the structural limitations of the optical imaging lens, the overall structure exhibits a structural feature of "large at both ends and small in the middle". By ensuring that (D1m - D4s) / Dr1r8 is within a certain range, the large segment difference between the first lens and the fourth lens and the distance on the optical axis can be ensured to be within a suitable range, reducing the bending moment when the fourth lens is assembled and stressed, and ensuring the assembly stability when the two end groups are assembled on the premise of the overall structure of "large at both ends and small in the middle".

[0075] In this embodiment, the outer diameter D0s of the object side end surface of the lens barrel, the minimum outer diameter dmin of the lens barrel, and the outer diameter D0m of the image side end surface of the lens barrel satisfy: 2.3 < (D0s - dmin) / (D0m - dmin) < 2.8. By controlling (D0s - dmin) / (D0m - dmin) within a reasonable range, it is ensured that the difference between the diameters at both ends of the lens and the minimum outer diameter of the lens barrel is within a suitable range, so as to ensure that the overall structure of the lens will not break during the drop test due to the too small outer diameter in the middle part, which is beneficial to the structural stability of the lens during mechanical reliability tests such as dropping. Preferably, 2.40 < (D0s - dmin) / (D0m - dmin) < 2.75.

[0076] In this embodiment, the plurality of spacer elements further include a fourth spacer element located between the fourth lens and the fifth lens and at least partially in contact with the image side surface of the fourth lens. The radius of curvature R11 of the object side surface of the sixth lens, the radius of curvature R9 of the object side surface of the fifth lens, and the radius of curvature R10 of the image side surface of the fifth lens satisfy: 1.5 < R11 / (R9 + R10) < 2.0. The spacing distance EP56 between the fifth spacer element and the sixth spacer element in the optical axis direction and the spacing distance EP45 between the fourth spacer element and the fifth spacer element in the optical axis direction satisfy: 1.1 < EP56 / EP45 < 1.8. By controlling R11 / (R9 + R10) and EP56 / EP45 within a reasonable range, the fifth lens and the sixth lens have appropriate curvatures, which is beneficial for the optical imaging lens to achieve a wide-angle feature. Combining the control of the distances between the fourth, fifth, and sixth spacer elements, the edge thicknesses of the fifth lens and the sixth lens are more reasonable, which is beneficial for the uniformity of the thickness ratio of the fifth lens and the sixth lens, and there will be no extreme processes during molding.

[0077] In this embodiment, the distance TD on the optical axis from the object side surface of the first lens to the image side surface of the eighth lens, the outer diameter D0s of the object side end surface of the lens barrel, and the outer diameter D0m of the image side end surface of the lens barrel satisfy: 1.7 < TD / (D0s - D0m) < 2.1. By controlling TD / (D0s - D0m) within a suitable range, it is beneficial to ensure that the aperture difference at both ends of the overall lens structure is within a reasonable range, effectively control the space occupied by the lens, reduce the lens volume, improve the compactness of the entire optical lens, and facilitate the design of the optical imaging lens to be thinner, lighter, and smaller.

[0078] In this embodiment, the plurality of spacer elements further includes a fourth spacer element located between the fourth lens and the fifth lens and at least partially in contact with the image side surface of the fourth lens. The combined focal length f12 of the first lens and the second lens, and the combined focal length f456 of the fourth lens, the fifth lens, and the sixth lens satisfy: 1.8 < f12 / f456 < 2.4. The outer diameter D2m of the image side surface of the second spacer element and the outer diameter D4s of the object side surface of the fourth spacer element satisfy: 1.7 < D2m / D4s < 3.4. By controlling f12 / f456 and D2m / D4s within a reasonable range, a reasonable setting of the combined focal length of the first lens and the second lens and the combined focal length of the fourth lens, the fifth lens, and the sixth lens can be achieved, ensuring that the refraction direction of light at the front end and the middle end of the optical imaging lens propagates in the required direction, facilitating ensuring that the imaging light reaches the designed image height position, and at the same time controlling the radial gap from the second lens to the fourth lens, which is beneficial for the optical imaging lens to ensure stability.

[0079] In this embodiment, the plurality of spacer elements further includes a fourth spacer element located between the fourth lens and the fifth lens and at least partially in contact with the image side surface of the fourth lens, and a seventh spacer element located between the seventh lens and the eighth lens and at least partially in contact with the image side surface of the seventh lens. The effective focal length f4 of the fourth lens, the effective focal length f7 of the seventh lens, the outer diameter D7s of the object side surface of the seventh spacer element, and the outer diameter D4m of the image side surface of the fourth spacer element satisfy: 0.4 < (f4 + f7) / (D7s - D4m) < 0.5. By controlling (f4 + f7) / (D7s - D4m) within a suitable range, the focal length levels of the fourth lens and the seventh lens can be effectively controlled, thereby controlling the axial dimension from the fourth lens to the seventh lens, making the overall structure from the fourth lens to the seventh lens more compact; at the same time, the difference in the outer diameters of the fourth lens and the seventh lens can also be controlled to ensure that the difference in the outer diameter step from the fourth lens to the seventh lens is not too large, thus ensuring the stability of the assembly process of the fourth lens to the seventh lens group.

[0080] In this embodiment, the following relationship is satisfied among the maximum height L of the lens barrel, the central thickness CT4 of the fourth lens, the central thickness CT5 of the fifth lens, and the central thickness CT6 of the sixth lens: 14.5 < L / (CT4 + CT5 + CT6) < 15.7. By controlling L / (CT4 + CT5 + CT6) within a reasonable range, the central thickness levels of the fourth, fifth, and sixth lenses can be effectively controlled, ensuring a reasonable distribution of the central thicknesses of these three lenses. Furthermore, the wall thickness rationality of these three lenses is guaranteed, which is beneficial to ensuring the lens strength, improving the demolding stability, facilitating the surface shape data stability, and ultimately ensuring the stability of the optical imaging lens quality.

[0081] In this embodiment, the plurality of spacer elements further includes a first spacer element located between the first lens and the second lens and at least partially in contact with the image side surface of the first lens. The following relationships are satisfied between the combined focal length f12 of the first lens and the second lens and the effective focal length f of the optical imaging lens: -9.0 < f12 / f < -7.3. The following relationships are satisfied among the maximum height L of the lens barrel, the axial distance EP01 from the object side end surface of the lens barrel to the object side surface of the first spacer element, and the spacer distance EP12 between the first spacer element and the second spacer element: 1.7 < L / (EP01 + EP12) < 2.0. By controlling the ratio of the combined focal length of the first lens and the second lens to the effective focal length of the optical imaging lens within a suitable range, the deflection angle of the marginal field of view in the first two lenses can be ensured, enabling the chief ray of the incident light to be transmitted along a predetermined path, effectively reducing the sensitivity of the optical imaging lens. At the same time, the curvatures of the first lens and the second lens also change. Further controlling L / (EP01 + EP12) within a reasonable range can effectively control the edge thicknesses of the first lens and the second lens, optimize the shapes of the first lens and the second lens, and improve the molding feasibility and stability of the first two lenses.

[0082] In this embodiment, the plurality of spacer elements further includes a first spacer element located between the first lens and the second lens and at least partially in contact with the image side surface of the first lens. The following relationship is satisfied among the spacer distance EP12 between the first spacer element and the second lens, the air gap T12 between the first lens and the second lens on the optical axis, and the air gap T23 between the second lens and the third lens on the optical axis: 1.0 < EP12 / (T12 + T23) < 1.4. By controlling the ratio of the air gap between the first lens and the second lens on the optical axis, the air gap between the second lens and the third lens on the optical axis, and the edge thickness of the second lens, the shape of the second lens becomes more reasonable, which is beneficial to reducing the sensitivity impact of the second lens on tilt and dispersion during the assembly process.

[0083] In this embodiment, the plurality of spacer elements further includes a first spacer element located between the first lens and the second lens and at least partially in contact with the image side of the first lens. The effective focal length f2 of the second lens and the effective focal length f1 of the first lens satisfy: -3.5 < f2 / f1 < -2.9. The inner diameter d1m of the image side of the first spacer element and the inner diameter d2s of the object side of the second spacer element satisfy: 1.1 < d1m / d2s < 1.4. By controlling f2 / f1 and d1m / d2s within a reasonable range, the focal length ratio of the first lens and the second lens can be effectively controlled within a suitable range, thus playing a decisive role in the design of the refraction propagation direction of the chief ray at the front end of the entire optical imaging lens. At the same time, when the ratio of the inner diameter of the image side of the first spacer element to the inner diameter of the object side of the second spacer element is controlled within a suitable range, it can produce a vignetting effect on the light rays in the marginal field of view, effectively intercepting part of the stray light generated by the first lens and the second lens while ensuring the relative illuminance of the marginal field of view.

[0084] In this embodiment, the plurality of spacer elements further includes a seventh spacer element located between the seventh lens and the eighth lens and at least partially in contact with the image side of the seventh lens. The effective focal length f6 of the sixth lens and the effective focal length f7 of the seventh lens satisfy: -1.9 < f6 / f7 < -1.0. The maximum thickness CP6 of the sixth spacer element, the inner diameter d7s of the object side of the seventh spacer element, and the inner diameter d6s of the object side of the sixth spacer element satisfy: 0.1 < CP6 / (d7s - d6s) < 0.5. By controlling f6 / f7 and CP6 / (d7s - d6s) within a reasonable range, the focal length ratio of the sixth lens and the seventh lens can be effectively controlled within a suitable range, thus playing a decisive role in the design of the refraction propagation direction of the chief ray at the rear end of the entire optical imaging lens, ensuring that the image height of the imaging light rays in each field of view reaches the ideal position. At the same time, controlling the thickness of the sixth spacer element and the inner diameters of the sixth and seventh spacer elements is beneficial to reducing the internal reflection and transmitted stray light generated by part of the sixth lens and the seventh lens.

[0085] In this embodiment, the plurality of spacer elements further includes a fourth spacer element located between the fourth lens and the fifth lens and at least partially in contact with the image side surface of the fourth lens. The combined focal length f456 of the fourth lens, the fifth lens, and the sixth lens, the spacing distance EP45 between the fourth spacer element and the fifth spacer element, and the spacing distance EP56 between the fifth spacer element and the sixth lens satisfy: -15.1 < f456 / (EP45 + EP56) < -12.1. By controlling f456 / (EP45 + EP56) within a suitable range, the focal lengths of the fourth, fifth, and sixth lenses can be effectively controlled, thereby controlling the surface bending curvature of these three lenses, effectively ensuring the feasibility of forming the surface shapes of these three lenses. At the same time, the edge thickness dimensions of the fourth lens and the fifth lens can be controlled, ensuring that the thickness ratio of these two lenses is within a reasonable range and reducing the risk of forming welding marks.

[0086] In this embodiment, the maximum outer diameter OD2 of the second lens and the maximum outer diameter OD3 of the third lens satisfy: 1.9 < OD2 / OD3 < 2.3, and the maximum outer diameter OD7 of the seventh lens and the maximum outer diameter OD6 of the sixth lens satisfy: 1.3 < OD7 / OD6 < 1.8. By controlling OD2 / OD3 and OD7 / OD6 within a reasonable range, it is beneficial to control the radial step difference between the adjacent second lens and the third lens, and the sixth lens and the seventh lens within a reasonable range, avoiding interfering with the effective diameter region of the lens with a larger outer diameter, and also avoiding the longer structural region size of the lens with a smaller outer diameter, ensuring good lens forming.

[0087] In this embodiment, along the direction from the object side to the image side of the optical imaging lens, the distance between the outer ring surface of the lens barrel and the optical axis first decreases and then increases. At the position where the distance between the outer ring surface and the optical axis is the smallest, there are a plurality of strengthening structures 10 extending away from the optical axis direction, and the plurality of strengthening structures 10 are arranged at intervals around the circumferential direction of the lens barrel. Since the structural feature of the optical imaging lens of this application is "large at both ends and small in the middle", the outer diameter of the lens barrel corresponding to the position of the diaphragm is the smallest. Compared with the larger sizes at both ends with larger apertures, this is an obvious weak area in terms of structural strength. When the optical imaging lens undergoes mechanical reliability tests such as drop impact, stress concentration is likely to occur here, and the risk of the lens barrel breaking is relatively high. Therefore, after arranging a plurality of strengthening structures 10 at intervals in the circumferential direction here, the structural strength here is significantly improved, and the structural stability during the reliability test is better. Preferably, the plurality of strengthening structures 10 are arranged at equal intervals.

[0088] Second Embodiment

[0089] As Figures 1 to 33, the number of lenses with optical power in the optical imaging lens is eight. The optical imaging lens includes: a first lens to an eighth lens arranged in sequence from the object side to the image side of the optical imaging lens, a plurality of spacer elements, and a lens barrel. The first lens has a negative optical power, the second lens has a positive optical power, the fourth lens has a negative optical power, the fifth lens has a positive optical power, the sixth lens has a negative optical power, the seventh lens has a positive optical power, the eighth lens has a negative optical power, and the image side surface of the eighth lens has at least one inflection point; at least one of the plurality of spacer elements includes a sixth spacer element located between the sixth lens and the seventh lens and at least partially in contact with the image side surface of the sixth lens, and a seventh spacer element located between the seventh lens and the eighth lens and at least partially in contact with the image side surface of the seventh lens; all the lenses and the plurality of spacer elements are accommodated in the lens barrel; wherein, the effective focal length f of the optical imaging lens and half of the maximum field of view angle Semi - FOV of the optical imaging lens satisfy: 0.6 < f / TAN(Semi - FOV) < 0.9; the effective focal length f6 of the sixth lens and the effective focal length f7 of the seventh lens satisfy: -1.9 < f6 / f7 < -1.0; the maximum thickness CP6 of the sixth spacer element, the inner diameter d7s of the object side surface of the seventh spacer element, and the inner diameter d6s of the object side surface of the sixth spacer element satisfy: 0.1 < CP6 / (d7s - d6s) < 0.5.

[0090] This application provides an eight - lens optical imaging lens, which meets the characteristics of a large field of view angle and satisfies 0.6 < f / TAN(Semi - FOV) < 0.9. However, due to the structural characteristics of the front - end large and rear - end small of the optical imaging lens in this application, stray light is likely to be generated at the rear end of the optical imaging lens. By controlling the focal lengths of the sixth and seventh lenses, and the thicknesses and inner diameters of the sixth and seventh spacer elements, the refraction direction of the chief ray at the rear end of the optical imaging lens is controlled, ensuring that the image heights of the imaging rays in each field of view reach the ideal positions, while suppressing the internal and transmitted stray light generated between the sixth lens and the seventh lens, and improving the imaging quality.

[0091] Preferably, 0.75 < f / TAN(Semi - FOV) < 0.85.

[0092] Preferably, -1.8 < f6 / f7 < -1.1.

[0093] Preferably, 0.2 < CP6 / (d7s - d6s) < 0.4.

[0094] It should be noted that other conditional expressions in the first embodiment may also be included in this embodiment, which will not be elaborated here one by one.

[0095] Optionally, the optical imaging lens may further include a filter for correcting color deviation and / or a protective glass for protecting the photosensitive element located on the imaging surface. The optical imaging lens in the present application may use multiple lenses, such as the eight lenses mentioned above. By reasonably allocating the effective focal length, surface shape, center thickness of each lens, and axial distance between each lens, etc., the aperture of the optical imaging lens can be effectively increased, the sensitivity of the lens can be reduced, and the processability of the lens can be improved, so that the optical imaging lens is more conducive to production and processing and can be applied to portable electronic devices such as smart phones.

[0096] Figure 1 and Figure 2 A schematic diagram of the structure of an optical imaging lens of the present application is shown. It should be noted that the object side surface of the spacer element is in at least partial contact with the structural portion of the lens adjacent to the object side or the spacer element adjacent to the object side, and the image side surface of the spacer element is in at least partial contact with the structural portion of the lens adjacent to the image side or the spacer element adjacent to the image side, so as to provide support between the structural portions of two adjacent lenses. Figure 1 and Figure 2 Parameters such as d2s, d0m, and D4m are also indicated in the figure to clearly and intuitively understand the meaning of the parameters. In order to facilitate the display of the optical imaging lens structure and the specific surface shape, these parameters will no longer be reflected in the drawings when describing the specific embodiments later.

[0097] Wherein, Dis refers to the outer diameter of the object side surface of the i-th spacer element, dis refers to the inner diameter of the object side surface of the i-th spacer element, Dim refers to the outer diameter of the image side surface of the i-th spacer element, dim refers to the inner diameter of the image side surface of the i-th spacer element, CPi refers to the maximum thickness of the i-th spacer element, that is, the maximum distance from the object side surface of the i-th spacer element to the image side surface along the optical axis, EPij refers to the distance between the image side surface of the i-th spacer element and the object side surface of the j-th spacer element along the optical axis, wherein i and j are positive integers greater than or equal to 1. And d0m is the inner diameter of the image side end surface of the lens barrel, D0m is the outer diameter of the image side end surface of the lens barrel, and D0s is the outer diameter of the object side end surface of the lens barrel. The maximum height L of the lens barrel refers to the maximum distance from the object side end surface of the lens barrel to the image side end surface of the lens barrel along the optical axis.

[0098] 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.

[0099] It should be noted that any one of the following embodiments 1 to 8 is applicable to all implementation methods of the present application.

[0100] Embodiment 1

[0101] like Figures 3 to 7 As shown, the optical imaging lens of the first embodiment of the present application is described.

[0102] like Figure 3 As shown, the optical imaging lens includes, from the object side to the image side, a first lens E1, a first spacer element P1, a second lens E2, a second spacer element P2, a second auxiliary spacer element P2b, a third lens E3, a fourth lens E4, a fourth spacer element P4, a fifth lens E5, a fifth spacer element P5, a sixth lens E6, a sixth spacer element P6, a seventh lens E7, a seventh spacer element P7, and an eighth lens E8. The above components are all accommodated in the lens barrel P0. Among them, the object side surface of the second auxiliary spacer element is supported by the image side surface of the second spacer element, and the image side surface of the second auxiliary spacer element is supported by the object side surface of the third lens. Two spacer elements are arranged between the second lens and the third lens for support, so as to meet the support stability of large step difference. At the same time, the inner diameters of the two spacer elements further intercept stray light and improve the imaging quality.

[0103] Table 2 below shows the basic structural parameters of the optical imaging lens of Example 1, wherein the units of the radius of curvature, thickness / distance, and effective focal length are all in millimeters. Table 2 also shows the object side surface S17 of the filter, the image side surface S18 of the filter, and the imaging surface S19.

[0104]

[0105]

[0106] Table 2

[0107] In this embodiment, the first lens to the eighth lens are all aspherical lenses, and the surface shape of each aspherical lens can be defined by but not limited to the following aspherical formula:

[0108]

[0109] Wherein, x is the distance vector height from the vertex of the aspherical surface when the aspherical surface is at a height of h along the optical axis; c is the paraxial curvature of the aspherical 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 aspherical surface. The following Table 3 lists the high-order coefficients A4, A6, A8, A10, A12, A14, A16, A18, and A20 that can be used for each aspherical mirror surface in this embodiment.

[0110] Face number A4 A6 A8 A10 A12 A14 A16 A18 A20 S1 1.16E-03 -1.10E-04 7.84E-06 -4.11E-07 1.42E-08 -3.00E-10 3.48E-12 -1.70E-14 0.00E+00 S2 1.36E-03 -9.14E-05 -4.51E-06 4.22E-06 -1.03E-06 1.44E-07 -1.26E-08 6.10E-10 -1.22E-11 S3 -1.87E-03 4.11E-04 -3.94E-05 1.61E-06 1.17E-07 -1.69E-08 6.10E-10 -3.82E-12 0.00E+00 S4 6.91E-03 -1.59E-03 4.91E-04 -1.31E-04 2.54E-05 -3.13E-06 2.15E-07 -6.24E-09 0.00E+00 S5 3.08E-03 -5.18E-04 -1.24E-03 1.36E-03 -8.74E-04 3.22E-04 -7.02E-05 8.60E-06 -4.67E-07 S6 -6.62E-03 9.19E-03 -7.41E-03 4.11E-03 -1.71E-03 5.71E-04 -1.43E-04 2.23E-05 -1.55E-06 S7 -8.49E-02 1.43E-01 -3.31E-01 8.56E-01 -1.77E+00 2.48E+00 -2.18E+00 1.08E+00 -2.30E-01 S8 -1.25E-01 2.19E-01 -6.02E-01 1.70E+00 -3.71E+00 5.38E+00 -4.84E+00 2.44E+00 -5.30E-01 S9 -3.76E-02 7.73E-02 -2.94E-01 9.10E-01 -2.09E+00 3.07E+00 -2.72E+00 1.34E+00 -2.81E-01 S10 -4.58E-02 1.14E-02 3.89E-03 -1.25E-01 3.15E-01 -4.49E-01 3.91E-01 -1.90E-01 3.89E-02 S11 -1.26E-01 1.23E-01 -1.28E-01 1.81E-01 -2.48E-01 2.20E-01 -1.08E-01 2.17E-02 0.00E+00 S12 -8.05E-02 1.13E-01 -8.90E-02 9.90E-02 -1.10E-01 8.52E-02 -4.21E-02 1.18E-02 -1.43E-03 S13 -1.73E-02 3.35E-03 -2.95E-04 4.94E-05 -3.27E-05 9.67E-06 -1.41E-06 1.04E-07 -3.13E-09 S14 1.90E-02 -1.22E-02 3.01E-03 -9.32E-05 -1.27E-04 3.63E-05 -4.97E-06 3.54E-07 -1.04E-08 S15 6.39E-03 -1.11E-02 3.25E-03 5.26E-04 -4.71E-04 1.15E-04 -1.44E-05 9.29E-07 -2.46E-08 S16 -2.81E-02 1.71E-03 5.06E-04 -1.83E-05 -3.60E-05 8.72E-06 -9.15E-07 4.68E-08 -9.51E-10

[0111] Table 3

[0112] Figure 4 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 5The astigmatism curve of the optical imaging lens of the first embodiment is shown, which represents the meridional image curvature and the sagittal image curvature. Figure 6 The distortion curve of the optical imaging lens of the first embodiment is shown, which indicates the distortion magnitude values ​​corresponding to different field angles. Figure 7 The magnification chromatic aberration curve of the optical imaging lens of the first embodiment is shown, which represents the deviation of different image heights on the imaging surface after the light passes through the optical imaging lens.

[0113] according to Figures 4 to 7 It can be seen that the optical imaging lens provided in the first embodiment can achieve good imaging quality.

[0114] Embodiment 2

[0115] The difference from the first embodiment is that at least some of the structural parameters such as the spacing element of the optical imaging lens are different.

[0116] like Figure 8 As shown, the optical imaging lens of the second embodiment of the present application is described. For the sake of brevity, some descriptions similar to the first embodiment will be omitted.

[0117] It should be noted that the parameters such as the curvature radius and center thickness of the first to eighth lenses of the optical imaging lens in Example 2 and Example 1 are the same, as shown in Table 2 and Table 3, but at least some of the parameters such as the lens barrel, the thickness of the spacer element, the inner diameter of the spacer element, the outer diameter of the spacer element, and the distance between the spacer elements of the optical imaging lens are different. Therefore, the imaging quality of the optical imaging lens of this embodiment is as follows: Figures 4 to 7 shown.

[0118] like Figure 8 As shown, only one second spacing element is provided between the second lens and the third lens, which simplifies the assembly process while ensuring assembly stability.

[0119] Embodiment 3

[0120] like Figures 9 to 13 As shown, the optical imaging lens of the third embodiment of the present application is described.

[0121] like Fig. 9As shown, the optical imaging lens includes, from the object side to the image side, a first lens E1, a first spacer element P1, a second lens E2, a second spacer element P2, a second auxiliary spacer element P2b, a third lens E3, a fourth lens E4, a fourth spacer element P4, a fifth lens E5, a fifth spacer element P5, a sixth lens E6, a sixth spacer element P6, a seventh lens E7, a seventh spacer element P7, and an eighth lens E8. The above components are all accommodated in the lens barrel P0. Among them, the object side surface of the second auxiliary spacer element is supported by the image side surface of the second spacer element, and the image side surface of the second auxiliary spacer element is supported by the object side surface of the third lens. Two spacer elements are set between the second lens and the third lens for support, so as to meet the support stability of large step difference. At the same time, the inner diameter of the two spacer elements further intercepts stray light and improves the imaging quality.

[0122] Table 4 below shows the basic structural parameters of the optical imaging lens of Example 3, where the units of the radius of curvature, thickness / distance, and effective focal length are all in millimeters. Table 4 also shows the object side surface S17 of the filter, the image side surface S18 of the filter, and the imaging surface S19.

[0123]

[0124]

[0125] Table 4

[0126] In this embodiment, the first lens to the eighth lens are all aspherical lenses, and the surface shape of each aspherical lens can be defined by, but not limited to, formula (1) in the first embodiment.

[0127] Table 5 below lists the high-order coefficients A4, A6, A8, A10, A12, A14, A16, A18, and A20 that can be used for each aspherical mirror surface in this embodiment.

[0128] Face number A4 A6 A8 A10 A12 A14 A16 A18 A20 S1 1.03E-03 -8.95E-05 5.63E-06 -2.60E-07 8.03E-09 -1.53E-10 1.62E-12 -7.23E-15 0.00E+00 S2 1.53E-03 -9.75E-05 -6.84E-06 4.65E-06 -1.09E-06 1.47E-07 -1.20E-08 5.39E-10 -1.01E-11 S3 -1.71E-03 3.29E-04 -2.37E-05 9.54E-07 -9.99E-08 1.71E-08 -1.23E-09 3.07E-11 0.00E+00 S4 6.60E-03 -1.20E-03 3.11E-04 -7.99E-05 1.46E-05 -1.58E-06 9.09E-08 -2.15E-09 0.00E+00 S5 2.26E-03 -5.32E-04 -5.42E-04 7.08E-04 -5.70E-04 2.70E-04 -8.08E-05 1.39E-05 -1.01E-06 S6 -6.86E-03 8.41E-03 -5.22E-03 2.11E-03 -7.31E-04 2.49E-04 -6.33E-05 9.01E-06 -5.37E-07 S7 -7.74E-02 1.11E-01 -1.69E-01 2.34E-01 -1.78E-01 -1.25E-01 4.43E-01 -3.98E-01 1.26E-01 S8 -1.26E-01 2.03E-01 -5.19E-01 1.40E+00 -2.93E+00 4.05E+00 -3.43E+00 1.62E+00 -3.26E-01 S9 -4.58E-02 8.08E-02 -2.67E-01 7.55E-01 -1.62E+00 2.20E+00 -1.78E+00 7.92E-01 -1.49E-01 S10 -3.98E-02 4.23E-03 5.16E-02 -3.14E-01 7.30E-01 -1.00E+00 8.33E-01 -3.81E-01 7.30E-02 S11 -1.16E-01 1.20E-01 -1.15E-01 1.18E-01 -1.37E-01 1.18E-01 -5.56E-02 1.02E-02 0.00E+00 S12 -8.27E-02 1.18E-01 -1.00E-01 1.12E-01 -1.23E-01 9.87E-02 -5.11E-02 1.49E-02 -1.83E-03 S13 -2.66E-02 5.90E-03 -1.25E-04 -5.11E-04 2.43E-04 -6.53E-05 1.08E-05 -1.01E-06 3.96E-08 S14 2.43E-02 -2.04E-02 9.42E-03 -3.07E-03 7.50E-04 -1.26E-04 1.33E-05 -7.79E-07 1.93E-08 S15 9.39E-03 -1.54E-02 8.53E-03 -2.65E-03 5.82E-04 -8.77E-05 8.32E-06 -4.40E-07 9.86E-09 S16 -4.01E-02 9.26E-03 -2.41E-03 6.86E-04 -1.49E-04 2.08E-05 -1.74E-06 7.87E-08 -1.46E-09

[0129] Table 5

[0130] Fig.10 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.11 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. Fig.12 The distortion curve of the optical imaging lens of the third embodiment is shown, which indicates the distortion magnitude values ​​corresponding to different field angles. Fig.13 The magnification chromatic aberration curve of the optical imaging lens of Example 3 is shown, which represents the deviation of different image heights on the imaging surface after the light passes through the optical imaging lens.

[0131] according to Figures 10 to 13 It can be seen that the optical imaging lens provided in the third embodiment can achieve good imaging quality.

[0132] Embodiment 4

[0133] The difference from the third embodiment is that at least some of the structural parameters such as the spacing element of the optical imaging lens are different.

[0134] like Fig.14 As shown, the optical imaging lens of the third embodiment of the present application is described. For the sake of brevity, some descriptions similar to the third embodiment will be omitted.

[0135] It should be noted that the parameters such as the curvature radius and center thickness of the first to eighth lenses of the optical imaging lens in the fourth embodiment and the third embodiment are the same, as shown in Table 4 and Table 5, but at least some of the parameters such as the lens barrel, the thickness of the spacer element, the inner diameter of the spacer element, the outer diameter of the spacer element, and the distance between the spacers of the optical imaging lens are different. Therefore, the imaging quality of the optical imaging lens of this embodiment is as follows: Figures 10 to 13 shown.

[0136] like Fig.14 As shown, only one second spacing element is provided between the second lens and the third lens, which simplifies the assembly process while ensuring assembly stability.

[0137] Embodiment 5

[0138] like Figures 15 to 19 As shown, the optical imaging lens of the fifth embodiment of the present application is described.

[0139] like Fig.15 As shown, the optical imaging lens includes, from the object side to the image side, a first lens E1, a first spacer P1, a second lens E2, a second spacer P2, a second auxiliary spacer P2b, a third lens E3, 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, a seventh spacer P7, a seventh auxiliary spacer P7b, and an eighth lens E8. The above components are all accommodated in the lens barrel P0. Among them, the object side surface of the second auxiliary spacer is supported by the image side surface of the second spacer, the image side surface of the second auxiliary spacer is supported by the object side surface of the third lens, the object side surface of the seventh auxiliary spacer is supported by the image side surface of the seventh spacer, and the image side surface of the seventh auxiliary spacer is supported by the object side surface of the eighth lens. Two spacers are respectively arranged between the second lens and the third lens and between the seventh lens and the eighth lens for support, so as to meet the support stability of large step difference. At the same time, the inner diameter of the two spacers further intercepts stray light and improves the imaging quality.

[0140] Table 6 below shows the basic structural parameters of the optical imaging lens of Example 5, where the units of the radius of curvature, thickness / distance, and effective focal length are all in millimeters. Table 6 also shows the object side surface S17 of the filter, the image side surface S18 of the filter, and the imaging surface S19.

[0141]

[0142]

[0143] Table 6

[0144] In this embodiment, the first lens to the eighth lens are all aspherical lenses, and the surface shape of each aspherical lens can be defined by, but not limited to, formula (1) in the first embodiment.

[0145] Table 7 below lists the higher-order coefficients A4, A6, A8, A10, A12, A14, A16, A18, and A20 that can be used for each aspherical mirror surface in this embodiment.

[0146] Face number A4 A6 A8 A10 A12 A14 A16 A18 A20 S1 1.29E-03 -1.30E-04 9.35E-06 -4.90E-07 1.68E-08 -3.49E-10 3.96E-12 -1.89E-14 0.00E+00 S2 1.57E-03 -3.68E-05 -2.84E-05 1.15E-05 -2.33E-06 2.95E-07 -2.41E-08 1.12E-09 -2.20E-11 S3 -2.11E-03 6.09E-04 -9.79E-05 1.14E-05 -9.69E-07 6.41E-08 -2.97E-09 6.48E-11 0.00E+00 S4 6.28E-03 -8.84E-04 1.37E-04 -2.23E-05 3.94E-06 -4.86E-07 3.17E-08 -8.35E-10 0.00E+00 S5 2.78E-03 -6.54E-04 -1.41E-04 2.19E-04 -2.90E-04 1.70E-04 -5.59E-05 9.75E-06 -6.97E-07 S6 -6.00E-03 8.17E-03 -6.39E-03 3.37E-03 -1.32E-03 3.94E-04 -8.12E-05 9.86E-06 -5.33E-07 S7 -8.27E-02 1.31E-01 -2.71E-01 5.91E-01 -1.03E+00 1.22E+00 -9.21E-01 3.91E-01 -7.12E-02 S8 -1.21E-01 1.86E-01 -4.07E-01 8.77E-01 -1.50E+00 1.73E+00 -1.20E+00 4.48E-01 -6.73E-02 S9 -3.52E-02 5.17E-02 -1.17E-01 1.73E-01 -1.69E-01 -6.17E-03 2.26E-01 -2.13E-01 6.26E-02 S10 -4.76E-02 1.01E-02 3.65E-02 -2.55E-01 6.07E-01 -8.40E-01 6.96E-01 -3.16E-01 6.00E-02 S11 -1.30E-01 1.33E-01 -1.45E-01 2.04E-01 -2.68E-01 2.25E-01 -1.03E-01 1.94E-02 0.00E+00 S12 -8.16E-02 1.14E-01 -7.71E-02 6.28E-02 -5.86E-02 4.07E-02 -1.80E-02 4.59E-03 -5.10E-04 S13 -1.66E-02 2.58E-03 4.51E-04 -2.86E-04 5.74E-05 -6.04E-06 3.37E-07 -8.28E-09 1.57E-11 S14 1.89E-02 -1.07E-02 1.83E-03 2.65E-04 -1.75E-04 3.68E-05 -4.30E-06 2.79E-07 -7.72E-09 S15 4.87E-03 -1.03E-02 3.73E-03 -4.51E-05 -2.43E-04 6.71E-05 -8.68E-06 5.70E-07 -1.52E-08 S16 -2.63E-02 -8.76E-04 1.85E-03 -3.92E-04 2.80E-05 1.80E-06 -4.58E-07 2.99E-08 -6.87E-10

[0147] Table 7

[0148] Fig.16 The axial chromatic aberration curve of the optical imaging lens of Example 5 is shown, which indicates the deviation of the focal point of light of different wavelengths after passing through the optical imaging lens. Fig.17 The astigmatism curve of the optical imaging lens of Example 5 is shown, which represents the meridional image curvature and the sagittal image curvature. Fig.18 The distortion curve of the optical imaging lens of Example 5 is shown, which represents the distortion magnitude values ​​corresponding to different field angles. Fig.19 The magnification chromatic aberration curve of the optical imaging lens of Example 5 is shown, which represents the deviation of different image heights on the imaging surface after the light passes through the optical imaging lens.

[0149] according to Figures 16 to 19 It can be seen that the optical imaging lens provided in Example 5 can achieve good imaging quality.

[0150] Embodiment 6

[0151] The difference from the fifth embodiment is that at least some of the structural parameters such as the spacing element of the optical imaging lens are different.

[0152] like Fig. 20 As shown, the optical imaging lens of the sixth embodiment of the present application is described. For the sake of brevity, some descriptions similar to those of the fifth embodiment will be omitted.

[0153] It should be noted that the parameters such as the curvature radius and center thickness of the first to eighth lenses of the optical imaging lenses in Example 6 and Example 5 are the same, as shown in Table 6 and Table 7, but at least some of the parameters such as the lens barrel, the thickness of the spacer element, the inner diameter of the spacer element, the outer diameter of the spacer element, and the distance between the spacer elements of the optical imaging lens are different. Therefore, the imaging quality of the optical imaging lens of this embodiment is as follows: Figures 16 to 19 shown.

[0154] like Fig. 20 As shown, only one spacer element is provided between the second lens and the third lens, which simplifies the assembly process while ensuring the stability of the assembly. In addition, a sixth auxiliary spacer element P6b is provided between the sixth lens and the seventh lens, and the object side surface of the sixth auxiliary spacer element is supported against the image side surface of the sixth spacer element, and the image side surface of the sixth auxiliary spacer element is supported against the object side surface of the seventh lens. Two spacer elements are provided between the sixth lens and the seventh lens for support, which further utilizes the inner diameter of the spacer element to intercept stray light while ensuring the stability of the assembly, thereby improving the imaging quality.

[0155] Embodiment 7

[0156] like Figure 21 to Figure 25 As shown, the optical imaging lens of the seventh embodiment of the present application is described.

[0157] like Fig.21 As shown, the optical imaging lens includes, from the object side to the image side, a first lens E1, a first spacer element P1, a second lens E2, a second spacer element P2, a second auxiliary spacer element P2b, a third lens E3, a fourth lens E4, a fourth spacer element P4, a fifth lens E5, a fifth spacer element P5, a sixth lens E6, a sixth spacer element P6, a seventh lens E7, a seventh spacer element P7, and an eighth lens E8. The above components are all accommodated in the lens barrel P0. Among them, the object side surface of the second auxiliary spacer element is supported by the image side surface of the second spacer element, and the image side surface of the second auxiliary spacer element is supported by the object side surface of the third lens. Two spacer elements are set between the second lens and the third lens for support, so as to meet the support stability of large step difference. At the same time, the inner diameter of the two spacer elements further intercepts stray light and improves the imaging quality.

[0158] Table 8 below shows the basic structural parameters of the optical imaging lens of Example 7, where the units of the radius of curvature, thickness / distance, and effective focal length are all in millimeters. Table 8 also shows the object side surface S17 of the filter, the image side surface S18 of the filter, and the imaging surface S19.

[0159]

[0160]

[0161] Table 8

[0162] In this embodiment, the first lens to the eighth lens are all aspherical lenses, and the surface shape of each aspherical lens can be defined by, but not limited to, formula (1) in the first embodiment.

[0163] Table 9 below lists the high-order coefficients A4, A6, A8, A10, A12, A14, A16, A18, and A20 that can be used for each aspherical mirror surface in this embodiment.

[0164] Face number A4 A6 A8 A10 A12 A14 A16 A18 A20 S1 1.29E-03 -1.30E-04 9.35E-06 -4.90E-07 1.68E-08 -3.49E-10 3.96E-12 -1.89E-14 0.00E+00 S2 1.57E-03 -3.68E-05 -2.84E-05 1.15E-05 -2.33E-06 2.95E-07 -2.41E-08 1.12E-09 -2.20E-11 S3 -2.11E-03 6.09E-04 -9.79E-05 1.14E-05 -9.69E-07 6.41E-08 -2.97E-09 6.48E-11 0.00E+00 S4 6.28E-03 -8.84E-04 1.37E-04 -2.23E-05 3.94E-06 -4.86E-07 3.17E-08 -8.35E-10 0.00E+00 S5 2.78E-03 -6.54E-04 -1.41E-04 2.19E-04 -2.90E-04 1.70E-04 -5.59E-05 9.75E-06 -6.97E-07 S6 -6.00E-03 8.17E-03 -6.39E-03 3.37E-03 -1.32E-03 3.94E-04 -8.12E-05 9.86E-06 -5.33E-07 S7 -8.27E-02 1.31E-01 -2.71E-01 5.91E-01 -1.03E+00 1.22E+00 -9.21E-01 3.91E-01 -7.12E-02 S8 -1.21E-01 1.86E-01 -4.07E-01 8.77E-01 -1.50E+00 1.73E+00 -1.20E+00 4.48E-01 -6.73E-02 S9 -3.52E-02 5.17E-02 -1.17E-01 1.73E-01 -1.69E-01 -6.17E-03 2.26E-01 -2.13E-01 6.26E-02 S10 -4.76E-02 1.01E-02 3.65E-02 -2.55E-01 6.07E-01 -8.40E-01 6.96E-01 -3.16E-01 6.00E-02 S11 -1.30E-01 1.33E-01 -1.45E-01 2.04E-01 -2.68E-01 2.25E-01 -1.03E-01 1.94E-02 0.00E+00 S12 -8.16E-02 1.14E-01 -7.71E-02 6.28E-02 -5.86E-02 4.07E-02 -1.80E-02 4.59E-03 -5.10E-04 S13 -1.66E-02 2.58E-03 4.51E-04 -2.86E-04 5.74E-05 -6.04E-06 3.37E-07 -8.28E-09 1.57E-11 S14 1.89E-02 -1.07E-02 1.83E-03 2.65E-04 -1.75E-04 3.68E-05 -4.30E-06 2.79E-07 -7.72E-09 S15 4.87E-03 -1.03E-02 3.73E-03 -4.51E-05 -2.43E-04 6.71E-05 -8.68E-06 5.70E-07 -1.52E-08 S16 -2.63E-02 -8.76E-04 1.85E-03 -3.92E-04 2.80E-05 1.80E-06 -4.58E-07 2.99E-08 -6.87E-10

[0165] Table 9

[0166] Fig. 22 The axial chromatic aberration curve of the optical imaging lens of Example 7 is shown, which indicates the deviation of the focal point of light of different wavelengths after passing through the optical imaging lens. Fig.23 The astigmatism curve of the optical imaging lens of Example 7 is shown, which represents the meridional image curvature and the sagittal image curvature. Fig.24 The distortion curve of the optical imaging lens of Example 7 is shown, which represents the distortion magnitude values ​​corresponding to different field angles. Fig.25 The magnification chromatic aberration curve of the optical imaging lens of Example 7 is shown, which represents the deviation of different image heights on the imaging surface after the light passes through the optical imaging lens.

[0167] according to Figure 22 to Figure 25 It can be seen that the optical imaging lens provided in Example 7 can achieve good imaging quality.

[0168] Embodiment 8

[0169] The difference from the seventh embodiment is that at least some of the structural parameters such as the spacing element of the optical imaging lens are different.

[0170] like Fig.26 As shown, the optical imaging lens of the eighth embodiment of the present application is described. For the sake of brevity, some descriptions similar to those of the fifth embodiment will be omitted.

[0171] It should be noted that the parameters such as the curvature radius and center thickness of the first to eighth lenses of the optical imaging lenses in Example 8 and Example 7 are the same, as shown in Table 8 and Table 9, but at least some of the parameters such as the lens barrel, the thickness of the spacer element, the inner diameter of the spacer element, the outer diameter of the spacer element, and the distance between the spacer elements of the optical imaging lens are different. Therefore, the imaging quality of the optical imaging lens of this embodiment is as follows: Figure 22 to Figure 25 shown.

[0172] like Fig.26As shown, only one spacer element is provided between the second lens and the third lens, which simplifies the assembly process while ensuring the stability of the assembly. In addition, a sixth auxiliary spacer element P6b is provided between the sixth lens and the seventh lens, and the object side surface of the sixth auxiliary spacer element is supported against the image side surface of the sixth spacer element, and the image side surface of the sixth auxiliary spacer element is supported against the object side surface of the seventh lens. Two spacer elements are provided between the sixth lens and the seventh lens for support, which further utilizes the inner diameter of the spacer element to intercept stray light while ensuring the stability of the assembly, thereby improving the imaging quality.

[0173] The black object data of the optical imaging lenses of Examples 1 to 8 are shown in Table 10 below.

[0174] Black material data (mm) / Example 1 2 3 4 5 6 7 8 d1m 7.13 7.07 7.13 7.07 7.00 6.94 7.23 7.17 D1m 14.00 14.10 14.38 14.48 14.38 14.48 14.38 14.48 d2s 5.48 5.62 5.56 5.62 5.67 5.67 5.82 5.75 D2m 10.40 6.31 10.40 6.26 10.40 6.94 10.40 6.96 D4s 3.20 3.30 3.20 3.33 3.20 3.30 3.20 3.30 D4m 3.20 3.30 3.20 3.33 3.20 3.30 3.20 3.30 d6s 2.80 2.74 2.85 2.79 2.63 2.57 2.71 2.65 d7s 5.79 5.73 6.03 5.97 4.47 4.41 5.88 5.82 d0m 7.92 8.02 7.92 8.02 7.46 7.56 7.58 7.68 D0s 15.49 15.59 15.86 15.96 15.86 15.96 15.86 15.96 D0m 8.72 8.82 8.72 8.82 8.36 8.46 8.36 8.46 EP01 3.29 3.29 3.53 3.53 3.40 3.40 3.55 3.55 CP1 0.02 0.02 0.02 0.02 0.02 0.02 0.02 0.02 EP12 4.14 4.14 4.13 4.13 4.25 4.25 4.22 4.22 CP2 0.02 1.48 0.02 1.59 0.02 1.73 0.02 1.52 EP45 0.35 0.35 0.33 0.33 0.33 0.33 0.40 0.40 EP56 0.54 0.54 0.57 0.57 0.50 0.50 0.49 0.49 CP6 1.07 1.02 1.08 1.02 0.51 0.46 0.71 0.66 L 14.10 14.10 14.18 14.18 14.13 14.13 14.33 14.33 CP2b 1.510 \ 1.6000 \ 1.74 \ 1.54 \ CP6b \ 0.022 \ 0.022 \ 0.022 \ 0.022 dmin 4.150 4.15 4.55 4.55 3.99 3.99 3.99 3.99 OD2 10.40 10.50 10.40 10.50 10.40 10.50 10.40 10.50 OD3 4.80 4.80 4.97 4.97 5.39 5.38 5.38 5.38 OD6 3.90 4.00 3.90 4.00 3.90 4.00 3.90 4.00 OD7 6.83 6.90 6.80 6.90 5.14 5.24 6.92 7.02

[0175] Table 10

[0176] Table 11 below shows the optical parameters of the optical imaging lenses in Embodiments 1 to 8.

[0177]

[0178]

[0179] Table 11 In summary, Embodiments 1 to 8 respectively satisfy the relationships shown in Table 12.

[0180] Conditional / Example 1 2 3 4 5 6 7 8 f / TAN(Semi-FOV) 0.80 0.80 0.80 0.80 0.83 0.83 0.79 0.79 D2s / DT32 6.04 4.48 5.06 3.75 5.69 4.18 5.17 3.80 D6m / D5m 1.61 1.62 1.62 1.62 1.19 1.19 1.62 1.61 (∑CP2+∑CP6) / (T23+T67) 2.71 2.63 3.58 3.48 2.51 2.45 2.38 2.30 (T12+CT2) / (CP1+∑CP2) 4.39 4.54 4.29 4.38 3.79 3.86 4.30 4.41 d0m / EPD*Semi-FOV 473.81 479.79 485.85 491.99 433.64 439.45 461.48 467.57 (D1m-D4s) / Dr1r8 1.08 1.08 1.08 1.08 1.10 1.10 1.08 1.08 (D0s-dmin) / (D0m-dmin) 2.48 2.45 2.71 2.67 2.72 2.68 2.72 2.68 R11 / (R9+R10) 1.75 1.75 1.62 1.62 1.76 1.76 1.95 1.95 EP56 / EP45 1.54 1.54 1.73 1.73 1.52 1.52 1.23 1.23 TD / (D0s-D0m) 2.04 2.04 1.96 1.96 1.85 1.85 1.83 1.83 f12 / f456 2.09 2.09 1.91 1.91 2.35 2.35 1.98 1.98 D2m / D4s 3.25 1.91 3.25 1.88 3.25 2.10 3.25 2.11 (f4+f7) / (D7s-D4m) -0.29 -0.29 -0.10 -0.10 -0.45 -0.48 0.34 0.34 L / (CT4+CT5+CT6) 14.97 14.97 14.65 14.65 15.14 15.14 15.59 15.59 f12 / f -8.58 -8.58 -8.86 -8.86 -8.85 -8.85 -7.45 -7.45 L / (EP01+EP12) 1.90 1.90 1.85 1.85 1.85 1.85 1.84 1.84 EP12 / (T12+T23) 1.21 1.21 1.19 1.19 1.26 1.26 1.27 1.27 f2 / f1 -3.18 -3.18 -3.22 -3.22 -3.06 -3.06 -3.41 -3.41 d1m / d2s 1.30 1.26 1.28 1.26 1.23 1.22 1.24 1.25 f6 / f7 -1.78 -1.78 -1.70 -1.70 -1.53 -1.53 -1.15 -1.15 CP6 / (d7s-d6s) 0.36 0.34 0.34 0.32 0.28 0.25 0.22 0.21 f456 / (EP45+EP56) -13.82 -13.82 -15.00 -15.00 -14.06 -14.06 -12.46 -12.46 OD2 / OD3 2.17 2.19 2.09 2.11 1.93 1.95 1.93 1.95 OD7 / OD6 1.75 1.73 1.74 1.73 1.32 1.31 1.77 1.76

[0181] Table 12

[0182] 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.

[0183] 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.

[0184] 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.

[0185] 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.

[0186] 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: The optical imaging lens has eight lenses with optical power, and the optical imaging lens includes: A first lens to an eighth lens arranged in sequence from the object side to the image side of the optical imaging lens; a plurality of spacer elements, wherein the plurality of spacer elements at least include a second spacer element located between the second lens and the third lens and at least partially in contact with the image side surface of the second lens, a fifth spacer element located between the fifth lens and the sixth lens and at least partially in contact with the image side surface of the fifth lens, and a sixth spacer element located between the sixth lens and the seventh lens and at least partially in contact with the image side surface of the sixth lens; a lens barrel, in which all of the lenses and the plurality of spacer elements are accommodated; Among them, the effective focal length f of the optical imaging lens and half of the maximum field of view angle of the optical imaging lens Semi-FOV: 0.6 <f / TAN(Semi-FOV)<0.9; The outer diameter D2s of the object side surface of the second spacer element and the effective half-aperture DT32 of the image side surface of the third lens satisfy: 3.5 <D2s / DT32<6.2; The outer diameter D6m of the image side surface of the sixth spacing element and the outer diameter D5m of the image side surface of the fifth spacing element satisfy: 1.0 <D6m / D5m<1.7; The sum of the maximum thicknesses ∑CP2 of all the spacing elements between the second lens and the third lens, the sum of the maximum thicknesses ∑CP6 of all the spacing elements between the sixth lens and the seventh lens, the air gap T23 between the second lens and the third lens on the optical axis of the optical imaging lens, and the air gap T67 between the sixth lens and the seventh lens on the optical axis satisfy the following: 2.2<(∑CP2+∑CP6) / (T23+T67)<3.

7.

2. The optical imaging lens according to claim 1, wherein: The center thickness of the second lens is the largest among the center thicknesses of all the lenses, and the multiple spacer elements also include a first spacer element located between the first lens and the second lens and at least partially in contact with the image side surface of the first lens. The air gap T12 between the first lens and the second lens on the optical axis, the center thickness CT2 of the second lens, the maximum thickness CP1 of the first spacer element, and the sum of the maximum thicknesses ∑CP2 of all spacer elements between the second lens and the third lens satisfy the following: 3.6<(T12+CT2) / (CP1+∑CP2)<4.

6.

3. The optical imaging lens according to claim 1, wherein: The inner diameter d0m of the image side end surface of the lens barrel, the entrance pupil diameter EPD of the optical imaging lens, and half of the maximum field of view Semi-FOV of the optical imaging lens satisfy the following conditions: 433.5° <d0m / EPD*Semi-FOV<492.1°。 4. The optical imaging lens according to claim 1, wherein: The plurality of spacer elements further includes a first spacer element located between the first lens and the second lens and at least partially in contact with the image side surface of the first lens, and a fourth spacer element located between the fourth lens and the fifth lens and at least partially in contact with the image side surface of the fourth lens. The outer diameter D1m of the image side surface of the first spacer element, the outer diameter D4s of the object side surface of the fourth spacer element, and the distance Dr1r8 on the optical axis from the object side surface of the first lens to the image side surface of the fourth lens satisfy: 1.0 < (D1m - D4s) / Dr1r8 < 1.

2.

5. The optical imaging lens according to claim 1, wherein: The outer diameter D0s of the object side end surface of the lens barrel, the minimum outer diameter dmin of the lens barrel, and the outer diameter D0m of the image side end surface of the lens barrel satisfy: 2.3 < (D0s - dmin) / (D0m - dmin) < 2.

8.

6. The optical imaging lens according to claim 1, wherein: The plurality of spacer elements further includes a fourth spacer element located between the fourth lens and the fifth lens and at least partially in contact with the image side surface of the fourth lens. The combined focal length f12 of the first lens and the second lens, and the combined focal length f456 of the fourth lens, the fifth lens, and the sixth lens satisfy: 1.8 < f12 / f456 < 2.

4. The outer diameter D2m of the image side surface of the second spacer element and the outer diameter D4s of the object side surface of the fourth spacer element satisfy: 1.7 < D2m / D4s < 3.

4.

7. The optical imaging lens according to claim 1, wherein: The plurality of spacer elements further includes a fourth spacer element located between the fourth lens and the fifth lens and at least partially in contact with the image side surface of the fourth lens, and a seventh spacer element located between the seventh lens and the eighth lens and at least partially in contact with the image side surface of the seventh lens. The effective focal length f4 of the fourth lens, the effective focal length f7 of the seventh lens, the outer diameter D7s of the object side surface of the seventh spacer element, and the outer diameter D4m of the image side surface of the fourth spacer element satisfy: -0.5 < (f4 + f7) / (D7s - D4m) < 0.

5.

8. The optical imaging lens according to claim 1, wherein: The maximum height L of the lens barrel, the central thickness CT4 of the fourth lens, the central thickness CT5 of the fifth lens, and the central thickness CT6 of the sixth lens satisfy: 14.5 < L / (CT4 + CT5 + CT6) < 15.

7.

9. The optical imaging lens according to claim 1, wherein: The plurality of spacer elements further includes a first spacer element located between the first lens and the second lens and at least partially in contact with the image side surface of the first lens. The combined focal length f12 of the first lens and the second lens, and the effective focal length f of the optical imaging lens satisfy: -9.0 < f12 / f < -7.

3. The maximum height L of the lens barrel, the spacer distance EP01 on the optical axis from the object side end surface of the lens barrel to the object side surface of the first spacer element, and the spacer distance EP12 between the first spacer element and the second spacer element satisfy: 1.7 < L / (EP01 + EP12) < 2.

0.

10. The optical imaging lens according to claim 1, wherein: The plurality of spacer elements further includes a first spacer element located between the first lens and the second lens and at least partially in contact with the image side surface of the first lens. The spacer distance EP12 between the first spacer element and the second spacer element, the air gap T12 between the first lens and the second lens on the optical axis, and the air gap T23 between the second lens and the third lens on the optical axis satisfy: 1.0 < EP12 / (T12 + T23) < 1.

4.

11. The optical imaging lens according to claim 1, wherein: The plurality of spacer elements further includes a fourth spacer element located between the fourth lens and the fifth lens and at least partially in contact with the image side surface of the fourth lens. The combined focal length f456 of the fourth lens, the fifth lens, and the sixth lens, the spacer distance EP45 between the fourth spacer element and the fifth spacer element, and the spacer distance EP56 between the fifth spacer element and the sixth spacer element satisfy: -15.1 < f456 / (EP45 + EP56) < -12.

1.

12. The optical imaging lens according to any one of claims 1 to 11, characterized in that: The maximum outer diameter OD2 of the second lens and the maximum outer diameter OD3 of the third lens satisfy: 1.9 < OD2 / OD3 < 2.3, and the maximum outer diameter OD7 of the seventh lens and the maximum outer diameter OD6 of the sixth lens satisfy: 1.3 < OD7 / OD6 < 1.

8.

13. The optical imaging lens according to any one of claims 1 to 11, characterized in that: Along the direction from the object side to the image side of the optical imaging lens, the distance between the outer ring surface of the lens barrel and the optical axis first decreases and then increases. At the position where the distance between the outer ring surface and the optical axis is the smallest, there are a plurality of reinforcing structures extending away from the optical axis, and the plurality of reinforcing structures are arranged at intervals around the circumferential direction of the lens barrel.

Images