Optical imaging lens

Abstract

The present application discloses an optical imaging lens, which comprises, in order from the object side to the image side along the optical axis, a first lens, a second lens, a third lens, a fourth lens, a fifth lens, a sixth lens, a seventh lens, and an eighth lens, each having optical power. The first lens has positive optical power, with its object-side surface being convex and its image-side surface being concave; the second lens has positive optical power, with its object-side surface being convex and its image-side surface being convex; the third lens has negative optical power, with its object-side surface being concave and its image-side surface being concave; the sixth lens has negative optical power, with its image-side surface being concave; and the object-side surface of the seventh lens is convex. The optical imaging lens comprises eight lenses having optical power. Half the diagonal length of an effective pixel area on the imaging plane of the optical imaging lens, ImgH, the distance T34 between the third lens and the fourth lens on the optical axis, and the distance T56 between the fifth lens and the sixth lens on the optical axis satisfy 1.6 < ImgH / (T34 + T56) < 2.1.

Description

[0001] Divisional application

[0002] This application is a divisional application of the Chinese invention patent application with the invention name “Optical Imaging Lens” and application number 201811230489.6 filed on October 22, 2018. Technical Field

[0003] The present application relates to an optical imaging lens, and in particular, to an optical imaging lens comprising eight lenses. Background Art

[0004] In recent years, the rapid evolution of portable electronic devices such as smartphones and tablets has placed increasingly stringent demands on the imaging lenses used with them. In addition to requiring high resolution, a large image area, and a large aperture, these lenses are also required to provide excellent imaging quality for distant scenes. However, achieving long focal length, high resolution, and high image quality while also miniaturizing them to accommodate increasingly thin and lightweight portable devices remains a pressing challenge in lens design. Summary of the Invention

[0005] The present application provides an optical imaging lens, such as a telephoto lens, that is applicable to portable electronic products and can at least solve or partially solve at least one of the above-mentioned shortcomings in the prior art.

[0006] In one aspect, the present application provides an optical imaging lens comprising, in order from the object side to the image side along the optical axis, a first lens, a second lens, a third lens, a fourth lens, a fifth lens, a sixth lens, a seventh lens, and an eighth lens, each having optical power. The first lens has positive optical power, with its object-side surface being convex and its image-side surface being concave; the second lens has positive optical power, with its object-side surface being convex and its image-side surface being convex; the third lens has negative optical power, with its object-side surface being concave and its image-side surface being concave; the sixth lens has negative optical power, with its image-side surface being concave; and the object-side surface of the seventh lens is convex. The optical imaging lens comprises eight lenses having optical power. Half the diagonal length of an effective pixel area on the imaging plane of the optical imaging lens, ImgH, the distance T34 between the third and fourth lenses on the optical axis, and the distance T56 between the fifth and sixth lenses on the optical axis satisfy 1.6 < ImgH / (T34 + T56) < 2.1.

[0007] In one embodiment, the center thickness CT1 of the first lens on the optical axis, the center thickness CT4 of the fourth lens on the optical axis, the center thickness CT5 of the fifth lens on the optical axis, and the distance TTL from the object-side surface of the first lens to the imaging surface of the optical imaging lens on the optical axis satisfy 1.8<(CT1+CT4+CT5)×10 / TTL<2.3.

[0008] In one embodiment, the center thickness CT7 of the seventh lens on the optical axis, the distance T78 between the seventh lens and the eighth lens on the optical axis, and the center thickness CT8 of the eighth lens on the optical axis satisfy 0.6<CT7 / (T78+CT8)<1.6.

[0009] In one embodiment, the total effective focal length f of the optical imaging lens, the curvature radius R1 of the object-side surface of the first lens element, the curvature radius R2 of the image-side surface of the first lens element, the curvature radius R3 of the object-side surface of the second lens element, and the curvature radius R4 of the image-side surface of the second lens element may satisfy 1.5<f / (R1+R2+R3+R4)<2.0.

[0010] In one embodiment, the curvature radius R5 of the object-side surface of the third lens, the curvature radius R6 of the image-side surface of the third lens, and the total effective focal length f of the optical imaging lens may satisfy 0.9<|R5+R6| / f<1.4.

[0011] In one embodiment, a curvature radius R12 of the image-side surface of the sixth lens element and a curvature radius R13 of the object-side surface of the seventh lens element may satisfy 0<R12 / R13<0.5.

[0012] In one embodiment, the distance TTL from the object-side surface of the first lens to the imaging surface of the optical imaging lens on the optical axis and the total effective focal length f of the optical imaging lens satisfy 0.87≤TTL / f<1.0.

[0013] In one embodiment, the total effective focal length f of the optical imaging lens and the combined focal length f12 of the first lens and the second lens satisfy 2<f / f12<2.5.

[0014] In one embodiment, the effective focal length f3 of the third lens and the effective focal length f6 of the sixth lens satisfy 0.7<f3 / f6<1.2.

[0015] In one embodiment, half of the maximum field of view (semi-FOV) of the optical imaging lens may satisfy 20°<semi-FOV<25°.

[0016] In one embodiment, the maximum effective semi-aperture DT11 of the object-side surface of the first lens and the maximum effective semi-aperture DT31 of the object-side surface of the third lens may satisfy 1.2<DT11 / DT31<1.7.

[0017] In one embodiment, the maximum effective semi-aperture DT82 of the image-side surface of the eighth lens and the maximum effective semi-aperture DT32 of the image-side surface of the third lens may satisfy 2.3<DT82 / DT32<3.3.

[0018] The present application uses eight lenses. By rationally allocating the optical power, surface shape, center thickness of each lens, and on-axis spacing between lenses, the optical imaging lens has at least one beneficial effect of long focal length, miniaturization, and high imaging quality. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Other features, purposes and advantages of the present application will become more apparent through the following detailed description of non-limiting embodiments in conjunction with the accompanying drawings. In the accompanying drawings:

[0020] Figure 1 1 shows a schematic structural diagram of an optical imaging lens according to Example 1 of the present application;

[0021] Figures 2A to 2D axial chromatic aberration curve, astigmatism curve, distortion curve, and lateral chromatic aberration curve of the optical imaging lens of Example 1 are respectively shown;

[0022] Figure 3 1 shows a schematic structural diagram of an optical imaging lens according to Example 2 of the present application;

[0023] Figures 4A to 4D axial chromatic aberration curve, astigmatism curve, distortion curve, and lateral chromatic aberration curve of the optical imaging lens of Example 2 are respectively shown;

[0024] Figure 5 1 shows a schematic structural diagram of an optical imaging lens according to Example 3 of the present application;

[0025] 6A to 6D axial chromatic aberration curve, astigmatism curve, distortion curve, and lateral chromatic aberration curve of the optical imaging lens of Example 3 are respectively shown;

[0026] Figure 7 1 shows a schematic structural diagram of an optical imaging lens according to Example 4 of the present application;

[0027] Figures 8A to 8D axial chromatic aberration curve, astigmatism curve, distortion curve, and lateral chromatic aberration curve of the optical imaging lens of Example 4 are respectively shown;

[0028] Figure 9 1 shows a schematic structural diagram of an optical imaging lens according to Example 5 of the present application;

[0029] 10A to 10D axial chromatic aberration curve, astigmatism curve, distortion curve, and lateral chromatic aberration curve of the optical imaging lens of Example 5 are respectively shown;

[0030] Figure 11 1 shows a schematic structural diagram of an optical imaging lens according to Example 6 of the present application;

[0031] 12A to 12D axial chromatic aberration curve, astigmatism curve, distortion curve, and lateral chromatic aberration curve of the optical imaging lens of Example 6 are respectively shown;

[0032] Figure 13 1 shows a schematic structural diagram of an optical imaging lens according to Example 7 of the present application;

[0033] 14A to 14D axial chromatic aberration curve, astigmatism curve, distortion curve, and lateral chromatic aberration curve of the optical imaging lens of Example 7 are shown respectively;

[0034] Figure 15 1 shows a schematic structural diagram of an optical imaging lens according to Example 8 of the present application;

[0035] 16A to 16D axial chromatic aberration curve, astigmatism curve, distortion curve, and lateral chromatic aberration curve of the optical imaging lens of Example 8 are respectively shown;

[0036] Figure 17 1 shows a schematic structural diagram of an optical imaging lens according to Example 9 of the present application;

[0037] 18A to 18D axial chromatic aberration curve, astigmatism curve, distortion curve, and lateral chromatic aberration curve of the optical imaging lens of Example 9 are shown respectively;

[0038] Figure 19 1 shows a schematic structural diagram of an optical imaging lens according to Example 10 of the present application;

[0039] 20A to 20D axial chromatic aberration curve, astigmatism curve, distortion curve, and lateral chromatic aberration curve of the optical imaging lens of Example 10 are respectively shown;

[0040] Figure 21 1 shows a schematic structural diagram of an optical imaging lens according to Example 11 of the present application;

[0041] 22A to 22D axial chromatic aberration curve, astigmatism curve, distortion curve, and lateral chromatic aberration curve of the optical imaging lens of Example 11 are respectively shown;

[0042] Figure 23 1 shows a schematic structural diagram of an optical imaging lens according to Example 12 of the present application;

[0043] 24A to 24D The axial chromatic aberration curve, astigmatism curve, distortion curve, and lateral chromatic aberration curve of the optical imaging lens of Example 12 are respectively shown. DETAILED DESCRIPTION

[0044] For a better understanding of the present application, various aspects of the present application will be described in more detail with reference to the accompanying drawings. It should be understood that these detailed descriptions are merely descriptions of exemplary embodiments of the present application and are not intended to limit the scope of the present application in any way. Throughout the specification, the same reference numerals refer to the same elements. The expression "and / or" includes any and all combinations of one or more of the associated listed items.

[0045] It should be noted that in this specification, the terms "first," "second," "third," etc., are used solely to distinguish one feature from another and do not limit the features. Thus, the first lens discussed below could also be referred to as the second lens or the third lens without departing from the teachings of this application.

[0046] In the drawings, the thickness, size, and shape of the lenses are slightly exaggerated for ease of illustration. Specifically, the shapes of the spherical and aspherical surfaces shown in the drawings are provided by way of example. That is, the shapes of the spherical and aspherical surfaces are not limited to those shown in the drawings. The drawings are for illustration only and are not drawn strictly to scale.

[0047] In this article, the paraxial region refers to the area near the optical axis. If a lens surface is convex and the location of the convex surface is undefined, it means that the lens surface is convex at least in the paraxial region. If a lens surface is concave and the location of the concave surface is undefined, it means that the lens surface is concave at least in the paraxial region. The surface of each lens closest to the subject is called the object-side surface of the lens, and the surface of each lens closest to the imaging plane is called the image-side surface of the lens.

[0048] It should also be understood that the terms "comprises," "including," "having," "includes," and / or "comprising," when used in this specification, indicate the presence of the stated features, elements, and / or components, but do not preclude the presence or addition of one or more other features, elements, components, and / or combinations thereof. In addition, when expressions such as "at least one of..." appear after a list of listed features, they modify the entire list of features rather than modifying the individual elements in the list. In addition, when describing embodiments of the present application, "may" is used to mean "one or more embodiments of the present application." And, the term "exemplary" is intended to refer to an example or illustration.

[0049] Unless otherwise defined, all terms used herein (including technical and scientific terms) have the same meaning as commonly understood by those skilled in the art to which this application belongs. It should also be understood that terms (such as those defined in commonly used dictionaries) should be interpreted as having a meaning consistent with their meaning in the context of the relevant technology and will not be interpreted in an idealized or overly formal sense unless expressly defined as such herein.

[0050] It should be noted that, in the absence of conflict, the embodiments and features of the embodiments in this application can be combined with each other. The present application will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0051] The features, principles and other aspects of the present application are described in detail below.

[0052] An optical imaging lens according to an exemplary embodiment of the present application may include, for example, eight lenses having optical power, namely, a first lens, a second lens, a third lens, a fourth lens, a fifth lens, a sixth lens, a seventh lens, and an eighth lens. These eight lenses are arranged sequentially along the optical axis from the object side to the image side, and air spaces may be provided between adjacent lenses.

[0053] In an exemplary embodiment, the first lens may have positive power, its object-side surface may be convex, and its image-side surface may be concave; the second lens may have positive or negative power; the third lens may have negative power, and its image-side surface may be concave; the fourth lens may have positive or negative power; the fifth lens may have positive or negative power; the sixth lens may have negative power; the seventh lens may have positive or negative power; and the eighth lens may have positive or negative power. Properly distributing the system's power can effectively correct spherical and chromatic aberrations, avoid excessive concentration of power on a single lens element, reduce lens sensitivity, and provide more relaxed tolerances for actual processing and assembly.

[0054] In example embodiments, the second lens may have positive refractive power, and its object-side surface may be convex, and its image-side surface may be convex.

[0055] In example embodiments, the object-side surface of the third lens may be a concave surface.

[0056] In an exemplary embodiment, the optical imaging lens of the present application may satisfy the conditional equation TTL / f < 1.0, where TTL is the distance on the optical axis from the object-side surface of the first lens element to the imaging plane of the optical imaging lens, and f is the total effective focal length of the optical imaging lens. More specifically, TTL and f may further satisfy 0.87 ≤ TTL / f ≤ 0.93. Meeting TTL / f < 1.0 allows for a long focal length while maintaining lens compactness, enabling excellent imaging quality when shooting long-range shots.

[0057] In an exemplary embodiment, the optical imaging lens of the present application can satisfy the condition 20° < semi-FOV < 25°, where the semi-FOV is half the maximum field of view of the optical imaging lens. More specifically, the semi-FOV can further satisfy 21.1° ≤ semi-FOV ≤ 22.0°. Properly controlling the field of view of the system can ensure high resolution and high relative brightness at the edges of the field of view when shooting long-range shots.

[0058] In an exemplary embodiment, the optical imaging lens of the present application may satisfy the condition 0.7 < f3 / f6 < 1.2, where f3 is the effective focal length of the third lens element and f6 is the effective focal length of the sixth lens element. More specifically, f3 and f6 may further satisfy 0.8 ≤ f3 / f6 ≤ 1.0, for example, 0.81 ≤ f3 / f6 ≤ 0.94. Properly allocating the focal powers of the third and sixth lenses effectively balances the astigmatism and vertical chromatic aberration generated by these two lenses, while also mitigating light deflection between the two lenses, thereby reducing the effective apertures of the fourth and fifth lenses.

[0059] In an exemplary embodiment, the optical imaging lens of the present application may satisfy the conditional formula 1.5 < f / (R1+R2+R3+R4) < 2.0, where f is the total effective focal length of the optical imaging lens, R1 is the radius of curvature of the object-side surface of the first lens, R2 is the radius of curvature of the image-side surface of the first lens, R3 is the radius of curvature of the object-side surface of the second lens, and R4 is the radius of curvature of the image-side surface of the second lens. More specifically, f, R1, R2, R3, and R4 may further satisfy 1.53 ≤ f / (R1+R2+R3+R4) ≤ 1.81. By controlling the radius of curvature of the first and second lenses, the incident and exit angles of light on the two lenses are reduced, reducing the sensitivity of the lenses and effectively balancing the high-order coma generated by the two lenses.

[0060] In an exemplary embodiment, the optical imaging lens of the present application may satisfy the condition 2 < f / f12 < 2.5, where f is the total effective focal length of the optical imaging lens, and f12 is the combined focal length of the first and second lenses. More specifically, f and f12 may further satisfy 2.18 ≤ f / f12 ≤ 2.30. Properly controlling the ratio of the total focal length of the system to the combined focal length of the first and second lenses can avoid excessive concentration of optical power on these two lenses, while also preventing significant spherical and chromatic aberrations in these two lenses.

[0061] In an exemplary embodiment, the optical imaging lens of the present application may satisfy the conditional formula 0<R12 / R13<0.5, wherein R12 is the radius of curvature of the image side surface of the sixth lens, and R13 is the radius of curvature of the object side surface of the seventh lens. More specifically, R12 and R13 may further satisfy 0.15≤R12 / R13≤0.42. By controlling the ratio of the radius of curvature of the image side surface of the sixth lens to the object side surface of the seventh lens within a reasonable range, the light is deflected more smoothly from the image side surface of the sixth lens to the object side surface of the seventh lens, while effectively reducing the coma, astigmatism and field curvature generated by the two lenses. Optionally, the image side surface of the sixth lens may be concave, and the object side surface of the seventh lens may be convex.

[0062] In an exemplary embodiment, the optical imaging lens of the present application may satisfy the conditional equation 0.9 < |R5+R6| / f < 1.4, where R5 is the radius of curvature of the object-side surface of the third lens element, R6 is the radius of curvature of the image-side surface of the third lens element, and f is the total effective focal length of the optical imaging lens. More specifically, R5, R6, and f may further satisfy 1.07 ≤ |R5+R6| / f ≤ 1.14. Properly allocating the radii of curvature of the object-side and image-side surfaces of the third lens element can reduce the incident and exit angles of light at the third lens element, thereby reducing the sensitivity of the lens element. Furthermore, it can effectively balance the high-order spherical aberration and astigmatism generated by the first two lens elements (i.e., the first and second lens elements).

[0063] In an exemplary embodiment, the optical imaging lens of the present application may satisfy the conditional equation 1.8 < (CT1 + CT4 + CT5) × 10 / TTL < 2.3, where CT1 is the center thickness of the first lens on the optical axis, CT4 is the center thickness of the fourth lens on the optical axis, CT5 is the center thickness of the fifth lens on the optical axis, and TTL is the distance on the optical axis from the object-side surface of the first lens to the imaging plane of the optical imaging lens. More specifically, CT1, CT4, CT5, and TTL may further satisfy 1.94 ≤ (CT1 + CT4 + CT5) × 10 / TTL ≤ 2.00. By properly controlling the center thicknesses of the first, fourth, and fifth lenses on the optical axis, the size of the lens front end can be reduced while ensuring manufacturability, and the coma and axial chromatic aberration generated by these three lenses can be effectively balanced.

[0064] In an exemplary embodiment, the optical imaging lens of the present application may satisfy the conditional equation 0.6 < CT7 / (T78 + CT8) < 1.6, where CT7 is the center thickness of the seventh lens element on the optical axis, T78 is the distance between the seventh and eighth lenses on the optical axis, and CT8 is the center thickness of the eighth lens element on the optical axis. More specifically, CT7, T78, and CT8 may further satisfy 0.61 ≤ CT7 / (T78 + CT8) ≤ 1.59. Satisfying the conditional equation 0.6 < CT7 / (T78 + CT8) < 1.6 can reduce the size of the rear end of the lens while ensuring manufacturability, while also helping to further balance the distortion and field curvature that are not fully eliminated by the front lens element.

[0065] In an exemplary embodiment, the optical imaging lens of the present application can satisfy the condition 1.2 < DT11 / DT31 < 1.7, where DT11 is the maximum effective semi-aperture of the object-side surface of the first lens element, and DT31 is the maximum effective semi-aperture of the object-side surface of the third lens element. More specifically, DT11 and DT31 can further satisfy 1.50 ≤ DT11 / DT31 ≤ 1.58. Properly allocating the maximum effective semi-apertures of the object-side surfaces of the first and third lens elements can reduce the front-end size of the lens while increasing light throughput and improving illumination at the edges of the field of view.

[0066] In an exemplary embodiment, the optical imaging lens of the present application may satisfy the conditional equation 2.3 < DT82 / DT32 < 3.3, where DT82 is the maximum effective semi-aperture of the image-side surface of the eighth lens element, and DT32 is the maximum effective semi-aperture of the image-side surface of the third lens element. More specifically, DT82 and DT32 may further satisfy 2.54 ≤ DT82 / DT32 ≤ 3.19. By controlling the maximum effective semi-aperture of the image-side surfaces of the eighth and third lens elements, the rear end size of the lens can be reduced while ensuring illumination at the periphery of the field of view and eliminating light rays that may impair image quality, thereby ensuring excellent imaging quality.

[0067] In an exemplary embodiment, the optical imaging lens of the present application may satisfy the conditional formula 1.6<ImgH / (T34+T56)<2.1, wherein ImgH is half the diagonal length of the effective pixel area on the imaging plane of the optical imaging lens, T34 is the distance between the third lens and the fourth lens on the optical axis, and T56 is the distance between the fifth lens and the sixth lens on the optical axis. More specifically, ImgH, T34, and T56 may further satisfy 1.81≤ImgH / (T34+T56)≤1.94. Satisfying the conditional formula 1.6<ImgH / (T34+T56)<2.1 can not only ensure a higher resolution of the edge field of view during long-range shooting, but also further shorten the lens size. In addition, such an arrangement also mitigates the angle at which light enters the fourth lens and the sixth lens, reducing the sensitivity of these two lenses.

[0068] In an exemplary embodiment, the optical imaging lens may further include an aperture to improve the imaging quality of the lens. Those skilled in the art will appreciate that the aperture may be positioned at any location as desired.

[0069] Optionally, the imaging lens may further include a filter for correcting color deviation and / or a protective glass for protecting a photosensitive element located on the imaging surface.

[0070] The optical imaging lens according to the above-described embodiment of the present application can utilize multiple lenses, such as the eight lenses described above. By rationally allocating the focal power, surface shape, center thickness of each lens, and on-axis spacing between lenses, the lens size can be effectively reduced, sensitivity reduced, and processability improved, making the imaging lens more amenable to production and suitable for portable electronic products such as mobile phones. This configuration also enables the imaging lens to exhibit characteristics such as long focal length, compact size, high resolution, and high imaging quality.

[0071] In an embodiment of the present application, at least one of the mirror surfaces of each lens is an aspherical mirror surface, that is, at least one of the object side surface and the image side surface of each lens in the first lens, the second lens, the third lens, the fourth lens, the fifth lens, the sixth lens, the seventh lens and the eighth lens is an aspherical mirror surface. The characteristic of an aspherical lens is that the curvature changes continuously from the center of the lens to the periphery of the lens. Unlike a spherical lens with a constant curvature from the center of the lens to the periphery of the lens, an aspherical lens has a better curvature radius characteristic, and has the advantages of improving distortion aberration and improving astigmatism aberration. After adopting an aspherical lens, the aberration that occurs during imaging can be eliminated as much as possible, thereby improving the imaging quality. Optionally, the object side surface and the image side surface of each lens in the first lens, the second lens, the third lens, the fourth lens, the fifth lens, the sixth lens, the seventh lens and the eighth lens are all aspherical mirror surfaces.

[0072] However, those skilled in the art will appreciate that the number of lenses comprising the optical imaging lens can be varied to achieve the various results and advantages described herein without departing from the claimed technical solutions. For example, while eight lenses are described in the embodiments, the optical imaging lens is not limited to eight lenses. If desired, the optical imaging lens may also include other numbers of lenses.

[0073] Specific embodiments of the optical imaging lens applicable to the above-mentioned embodiments will be further described below with reference to the accompanying drawings.

[0074] Example 1

[0075] The following reference Figures 1 to 2D The optical imaging lens according to Example 1 of the present application is described. Figure 1 A schematic structural diagram of an optical imaging lens according to Example 1 of the present application is shown.

[0076] like Figure 1As shown, the optical imaging lens according to an exemplary embodiment of the present application includes, in order from the object side to the image side along the optical axis: a first lens E1, a second lens E2, a third lens E3, a fourth lens E4, a fifth lens E5, a sixth lens E6, a seventh lens E7, an eighth lens E8, a filter E9 and an imaging surface S19.

[0077] The first lens E1 has positive focal power, with its object-side surface S1 being convex and its image-side surface S2 being concave. The second lens E2 has positive focal power, with its object-side surface S3 being convex and its image-side surface S4 being convex. The third lens E3 has negative focal power, with its object-side surface S5 being concave and its image-side surface S6 being concave. The fourth lens E4 has positive focal power, with its object-side surface S7 being concave and its image-side surface S8 being convex. The fifth lens E5 has negative focal power, with its object-side surface S9 being concave and its image-side surface S10 being convex. The sixth lens E6 has negative focal power, with its object-side surface S11 being concave and its image-side surface S12 being concave. The seventh lens E7 has positive focal power, with its object-side surface S13 being convex and its image-side surface S14 being convex. The eighth lens E8 has positive focal power, with its object-side surface S15 being concave and its image-side surface S16 being convex. The filter E9 has an object-side surface S17 and an image-side surface S18. Light from the object passes through the surfaces S1 to S18 in sequence and is finally imaged on the imaging surface S19.

[0078] The optical imaging lens in this embodiment may also be provided with a diaphragm for limiting the light beam to improve imaging quality.

[0079] Table 1 shows the surface type, curvature radius, thickness, material, and conic coefficient of each lens of the optical imaging lens of Example 1, where the units of curvature radius and thickness are both millimeters (mm).

[0080]

[0081] Table 1

[0082] As can be seen from Table 1, the object-side surface and image-side surface of any lens from the first lens E1 to the eighth lens E8 are all aspherical surfaces. In this embodiment, the surface shape x of each aspherical lens can be defined by, but is not limited to, the following aspherical surface formula:

[0083]

[0084] Wherein, x is the distance vector height of the aspheric surface from the vertex of the aspheric surface at a height of h along the optical axis; c is the paraxial curvature of the aspheric surface, c = 1 / R (i.e., the paraxial curvature c is the reciprocal of the curvature radius R in Table 1 above); k is the cone coefficient (given in Table 1); Ai is the correction coefficient of the i-th order of the aspheric surface. Table 2 below lists the high-order coefficients A4, A6, A8, A9, A10, A11, A12, A13, A14, A15, A16, A17, A18, A19, A20, A21, A22, A23, A24, A25, A26, A27, A28, A30, A31, A32, A33, A34, A35, A36, A37, A38, A39, A40, A41, A42, A43, A44, A45, A46, A47, A50, A51, A52, A53, A54, A55, A56, A57, A58, A59, A60, A61, A71, A72, A73, A74, A75, A80, A81, A9, A10, A11, A12, A13, A14, A15 10 、A12 、A 14 、A 16 、A 18 and A 20 .

[0085]

[0086]

[0087] Table 2

[0088] Table 3 shows the effective focal lengths f1 to f8 of each lens in Example 1, the total effective focal length f of the optical imaging lens, the distance TTL on the optical axis from the object-side surface S1 of the first lens E1 to the imaging surface S19, half the diagonal length ImgH of the effective pixel area on the imaging surface S19, and half the maximum field of view (semi-FOV).

[0089] f1(mm) 4.15 f7(mm) 11.01 f2(mm) 10.08 f8(mm) 28.42 f3(mm) -3.93 f(mm) 6.97 f4(mm) 49.79 TTL(mm) 6.35 f5(mm) -245.70 ImgH(mm) 2.78 f6(mm) -4.39 semi-FOV(°) 21.8

[0090] Table 3

[0091] The optical imaging lens in Example 1 satisfies the following requirements:

[0092] TTL / f=0.91, where TTL is the distance on the optical axis from the object-side surface S1 of the first lens element E1 to the imaging surface S19, and f is the total effective focal length of the optical imaging lens;

[0093] f3 / f6=0.90, where f3 is the effective focal length of the third lens element E3, and f6 is the effective focal length of the sixth lens element E6;

[0094] f / (R1+R2+R3+R4)=1.71, where f is the total effective focal length of the optical imaging lens, R1 is the radius of curvature of the object-side surface S1 of the first lens element E1, R2 is the radius of curvature of the image-side surface S2 of the first lens element E1, R3 is the radius of curvature of the object-side surface S3 of the second lens element E2, and R4 is the radius of curvature of the image-side surface S4 of the second lens element E2;

[0095] f / f12=2.23, where f is the total effective focal length of the optical imaging lens, and f12 is the combined focal length of the first lens element E1 and the second lens element E2;

[0096] R12 / R13=0.34, where R12 is the curvature radius of the image-side surface S12 of the sixth lens element E6, and R13 is the curvature radius of the object-side surface S13 of the seventh lens element E7;

[0097] |R5+R6| / f=1.12, where R5 is the radius of curvature of the object-side surface S5 of the third lens element E3, R6 is the radius of curvature of the image-side surface S6 of the third lens element E3, and f is the total effective focal length of the optical imaging lens;

[0098] (CT1+CT4+CT5)×10 / TTL=1.97, where CT1 is the center thickness of the first lens E1 on the optical axis, CT4 is the center thickness of the fourth lens E4 on the optical axis, CT5 is the center thickness of the fifth lens E5 on the optical axis, and TTL is the distance on the optical axis from the object-side surface S1 of the first lens E1 to the imaging surface S19;

[0099] CT7 / (T78+CT8)=1.50, where CT7 is the center thickness of the seventh lens E7 on the optical axis, T78 is the distance between the seventh lens E7 and the eighth lens E8 on the optical axis, and CT8 is the center thickness of the eighth lens E8 on the optical axis;

[0100] DT11 / DT31=1.55, where DT11 is the maximum effective semi-aperture of the object-side surface S1 of the first lens element E1, and DT31 is the maximum effective semi-aperture of the object-side surface S5 of the third lens element E3;

[0101] DT82 / DT32=3.01, where DT82 is the maximum effective semi-aperture of the image-side surface S16 of the eighth lens element E8, and DT32 is the maximum effective semi-aperture of the image-side surface S6 of the third lens element E3;

[0102] ImgH / (T34+T56)=1.86, where ImgH is half the diagonal length of the effective pixel area on the imaging plane S19, T34 is the distance between the third lens element E3 and the fourth lens element E4 on the optical axis, and T56 is the distance between the fifth lens element E5 and the sixth lens element E6 on the optical axis.

[0103] Figure 2A The axial chromatic aberration curve of the optical imaging lens of Example 1 is shown, which indicates the deviation of the focal point of light of different wavelengths passing through the lens. Figure 2B The astigmatism curve of the optical imaging lens of Example 1 is shown, which represents the meridional field curvature and the sagittal field curvature. Figure 2C The distortion curve of the optical imaging lens of Example 1 is shown, which represents the distortion magnitude value under different fields of view. Figure 2D The chromatic aberration curve of the optical imaging lens of Example 1 is shown, which represents the deviation of different image heights on the imaging surface after the light passes through the lens. Figures 2A to 2D It can be seen that the optical imaging lens provided in Example 1 can achieve good imaging quality.

[0104] Example 2

[0105] The following reference Figures 3 to 4DThe optical imaging lens according to Example 2 of the present application is described. In this embodiment and the following embodiments, for the sake of brevity, some descriptions similar to Example 1 will be omitted. Figure 3 A schematic structural diagram of an optical imaging lens according to Example 2 of the present application is shown.

[0106] like Figure 3 As shown, the optical imaging lens according to an exemplary embodiment of the present application includes, in order from the object side to the image side along the optical axis: a first lens E1, a second lens E2, a third lens E3, a fourth lens E4, a fifth lens E5, a sixth lens E6, a seventh lens E7, an eighth lens E8, a filter E9 and an imaging surface S19.

[0107] The first lens E1 has positive focal power, with its object-side surface S1 being convex and its image-side surface S2 being concave. The second lens E2 has positive focal power, with its object-side surface S3 being convex and its image-side surface S4 being convex. The third lens E3 has negative focal power, with its object-side surface S5 being concave and its image-side surface S6 being concave. The fourth lens E4 has positive focal power, with its object-side surface S7 being concave and its image-side surface S8 being convex. The fifth lens E5 has negative focal power, with its object-side surface S9 being concave and its image-side surface S10 being convex. The sixth lens E6 has negative focal power, with its object-side surface S11 being concave and its image-side surface S12 being concave. The seventh lens E7 has positive focal power, with its object-side surface S13 being convex and its image-side surface S14 being concave. The eighth lens E8 has positive focal power, with its object-side surface S15 being convex and its image-side surface S16 being convex. The filter E9 has an object-side surface S17 and an image-side surface S18. Light from the object passes through the surfaces S1 to S18 in sequence and is finally imaged on the imaging surface S19.

[0108] The optical imaging lens in this embodiment may also be provided with a diaphragm for limiting the light beam to improve imaging quality.

[0109] Table 4 shows the surface type, curvature radius, thickness, material, and conic coefficient of each lens of the optical imaging lens of Example 2, where the units of curvature radius and thickness are both millimeters (mm).

[0110]

[0111]

[0112] Table 4

[0113] As can be seen from Table 4, in Example 2, both the object-side surface and the image-side surface of any of the first lens element E1 through the eighth lens element E8 are aspherical surfaces. Table 5 shows the high-order coefficients of the various aspherical mirror surfaces that can be used in Example 2, where the surface shape of each aspherical surface can be defined by Formula (1) given in Example 1 above.

[0114]

[0115] Table 5

[0116] Table 6 shows the effective focal lengths f1 to f8 of each lens in Example 2, the total effective focal length f of the optical imaging lens, the distance TTL on the optical axis from the object-side surface S1 of the first lens E1 to the imaging surface S19, half the diagonal length ImgH of the effective pixel area on the imaging surface S19, and half the maximum field of view (semi-FOV).

[0117] f1(mm) 4.15 f7(mm) 66.38 f2(mm) 10.08 f8(mm) 9.17 f3(mm) -3.93 f(mm) 6.95 f4(mm) 50.43 TTL(mm) 6.37 f5(mm) -269.33 ImgH(mm) 2.79 f6(mm) -4.44 semi-FOV(°) 22.0

[0118] Table 6

[0119] Figure 4A The axial chromatic aberration curve of the optical imaging lens of Example 2 is shown, which indicates the deviation of the focal point of light of different wavelengths passing through the lens. Figure 4B The astigmatism curve of the optical imaging lens of Example 2 is shown, which represents the meridional field curvature and the sagittal field curvature. Figure 4C The distortion curve of the optical imaging lens of Example 2 is shown, which represents the distortion magnitude value under different fields of view. Figure 4D The chromatic aberration curve of the optical imaging lens of Example 2 is shown, which represents the deviation of different image heights on the imaging surface after the light passes through the lens. Figures 4A to 4D It can be seen that the optical imaging lens provided in Example 2 can achieve good imaging quality.

[0120] Example 3

[0121] The following reference Figures 5 to 6D An optical imaging lens according to Example 3 of the present application is described. Figure 5 A schematic structural diagram of an optical imaging lens according to Example 3 of the present application is shown.

[0122] like Figure 5 As shown, the optical imaging lens according to an exemplary embodiment of the present application includes, in order from the object side to the image side along the optical axis: a first lens E1, a second lens E2, a third lens E3, a fourth lens E4, a fifth lens E5, a sixth lens E6, a seventh lens E7, an eighth lens E8, a filter E9 and an imaging surface S19.

[0123] The first lens E1 has positive focal power, with its object-side surface S1 being convex and its image-side surface S2 being concave. The second lens E2 has positive focal power, with its object-side surface S3 being convex and its image-side surface S4 being convex. The third lens E3 has negative focal power, with its object-side surface S5 being concave and its image-side surface S6 being concave. The fourth lens E4 has positive focal power, with its object-side surface S7 being convex and its image-side surface S8 being convex. The fifth lens E5 has negative focal power, with its object-side surface S9 being concave and its image-side surface S10 being convex. The sixth lens E6 has negative focal power, with its object-side surface S11 being concave and its image-side surface S12 being concave. The seventh lens E7 has positive focal power, with its object-side surface S13 being convex and its image-side surface S14 being concave. The eighth lens E8 has positive focal power, with its object-side surface S15 being convex and its image-side surface S16 being concave. The filter E9 has an object-side surface S17 and an image-side surface S18. Light from the object passes through the surfaces S1 to S18 in sequence and is finally imaged on the imaging surface S19.

[0124] The optical imaging lens in this embodiment may also be provided with a diaphragm for limiting the light beam to improve imaging quality.

[0125] Table 7 shows the surface type, curvature radius, thickness, material, and conic coefficient of each lens of the optical imaging lens of Example 3, where the units of curvature radius and thickness are both millimeters (mm).

[0126]

[0127] Table 7

[0128] As can be seen from Table 7, in Example 3, both the object-side surface and the image-side surface of any of the first lens element E1 through the eighth lens element E8 are aspherical surfaces. Table 8 shows the high-order coefficients of the various aspherical mirror surfaces that can be used in Example 3, where the surface shape of each aspherical surface can be defined by Formula (1) given in Example 1 above.

[0129]

[0130]

[0131] Table 8

[0132] Table 9 shows the effective focal lengths f1 to f8 of each lens in Example 3, the total effective focal length f of the optical imaging lens, the distance TTL on the optical axis from the object-side surface S1 of the first lens E1 to the imaging surface S19, half the diagonal length of the effective pixel area on the imaging surface S19 ImgH, and half the maximum field of view (semi-FOV).

[0133] f1(mm) 4.15 f7(mm) 315.32 f2(mm) 10.08 f8(mm) 8.74 f3(mm) -3.92 f(mm) 6.95 f4(mm) 23.53 TTL(mm) 6.31 f5(mm) -32.65 ImgH(mm) 2.73 f6(mm) -4.42 semi-FOV(°) 21.7

[0134] Table 9

[0135] Figure 6A The axial chromatic aberration curve of the optical imaging lens of Example 3 is shown, which indicates the deviation of the focal point of light of different wavelengths passing through the lens. Figure 6B The astigmatism curve of the optical imaging lens of Example 3 is shown, which represents the meridional field curvature and the sagittal field curvature. Figure 6C The distortion curve of the optical imaging lens of Example 3 is shown, which represents the distortion magnitude value under different fields of view. Figure 6D The chromatic aberration curve of the optical imaging lens of Example 3 is shown, which represents the deviation of different image heights on the imaging surface after the light passes through the lens. 6A to 6D It can be seen that the optical imaging lens provided in Example 3 can achieve good imaging quality.

[0136] Example 4

[0137] The following reference Figures 7 to 8D An optical imaging lens according to Example 4 of the present application is described. Figure 7 A schematic structural diagram of an optical imaging lens according to Example 4 of the present application is shown.

[0138] like Figure 7 As shown, the optical imaging lens according to an exemplary embodiment of the present application includes, in order from the object side to the image side along the optical axis: a first lens E1, a second lens E2, a third lens E3, a fourth lens E4, a fifth lens E5, a sixth lens E6, a seventh lens E7, an eighth lens E8, a filter E9 and an imaging surface S19.

[0139] The first lens E1 has positive focal power, with its object-side surface S1 being convex and its image-side surface S2 being concave. The second lens E2 has positive focal power, with its object-side surface S3 being convex and its image-side surface S4 being convex. The third lens E3 has negative focal power, with its object-side surface S5 being concave and its image-side surface S6 being concave. The fourth lens E4 has positive focal power, with its object-side surface S7 being concave and its image-side surface S8 being convex. The fifth lens E5 has positive focal power, with its object-side surface S9 being concave and its image-side surface S10 being convex. The sixth lens E6 has negative focal power, with its object-side surface S11 being concave and its image-side surface S12 being concave. The seventh lens E7 has negative focal power, with its object-side surface S13 being convex and its image-side surface S14 being concave. The eighth lens E8 has positive focal power, with its object-side surface S15 being convex and its image-side surface S16 being concave. The filter E9 has an object-side surface S17 and an image-side surface S18. Light from the object passes through the surfaces S1 to S18 in sequence and is finally imaged on the imaging surface S19.

[0140] The optical imaging lens in this embodiment may also be provided with a diaphragm for limiting the light beam to improve imaging quality.

[0141] Table 10 shows the surface type, curvature radius, thickness, material, and conic coefficient of each lens of the optical imaging lens of Example 4, where the units of curvature radius and thickness are both millimeters (mm).

[0142]

[0143] Table 10

[0144] As can be seen from Table 10, in Example 4, both the object-side surface and the image-side surface of any of the first lens element E1 through the eighth lens element E8 are aspherical surfaces. Table 11 shows the high-order coefficients of the various aspherical mirror surfaces that can be used in Example 4, where the surface shape of each aspherical surface can be defined by Formula (1) given in Example 1 above.

[0145]

[0146]

[0147] Table 11

[0148] Table 12 shows the effective focal lengths f1 to f8 of each lens in Example 4, the total effective focal length f of the optical imaging lens, the distance TTL on the optical axis from the object-side surface S1 of the first lens E1 to the imaging surface S19, half the diagonal length of the effective pixel area on the imaging surface S19 ImgH, and half the maximum field of view (semi-FOV).

[0149] f1(mm) 4.15 f7(mm) -38.25 f2(mm) 10.08 f8(mm) 5.97 f3(mm) -3.93 f(mm) 6.95 f4(mm) 65.66 TTL(mm) 6.40 f5(mm) 520.05 ImgH(mm) 2.79 f6(mm) -4.18 semi-FOV(°) 21.9

[0150] Table 12

[0151] Figure 8A The axial chromatic aberration curve of the optical imaging lens of Example 4 is shown, which indicates the deviation of the focal point of light of different wavelengths passing through the lens. Figure 8B The astigmatism curve of the optical imaging lens of Example 4 is shown, which represents the meridional field curvature and the sagittal field curvature. Figure 8C The distortion curve of the optical imaging lens of Example 4 is shown, which represents the distortion magnitude value under different fields of view. Figure 8D The chromatic aberration curve of the optical imaging lens of Example 4 is shown, which represents the deviation of different image heights on the imaging surface after the light passes through the lens. Figures 8A to 8D It can be seen that the optical imaging lens provided in Example 4 can achieve good imaging quality.

[0152] Example 5

[0153] The following reference Figures 9 to 10D An optical imaging lens according to Example 5 of the present application is described. Figure 9A schematic structural diagram of an optical imaging lens according to Example 5 of the present application is shown.

[0154] like Figure 9 As shown, the optical imaging lens according to an exemplary embodiment of the present application includes, in order from the object side to the image side along the optical axis: a first lens E1, a second lens E2, a third lens E3, a fourth lens E4, a fifth lens E5, a sixth lens E6, a seventh lens E7, an eighth lens E8, a filter E9 and an imaging surface S19.

[0155] The first lens E1 has positive focal power, with its object-side surface S1 being convex and its image-side surface S2 being concave. The second lens E2 has positive focal power, with its object-side surface S3 being convex and its image-side surface S4 being convex. The third lens E3 has negative focal power, with its object-side surface S5 being concave and its image-side surface S6 being concave. The fourth lens E4 has positive focal power, with its object-side surface S7 being concave and its image-side surface S8 being convex. The fifth lens E5 has negative focal power, with its object-side surface S9 being concave and its image-side surface S10 being convex. The sixth lens E6 has negative focal power, with its object-side surface S11 being concave and its image-side surface S12 being concave. The seventh lens E7 has positive focal power, with its object-side surface S13 being convex and its image-side surface S14 being convex. The eighth lens E8 has negative focal power, with its object-side surface S15 being concave and its image-side surface S16 being convex. The filter E9 has an object-side surface S17 and an image-side surface S18. Light from the object passes through the surfaces S1 to S18 in sequence and is finally imaged on the imaging surface S19.

[0156] The optical imaging lens in this embodiment may also be provided with a diaphragm for limiting the light beam to improve imaging quality.

[0157] Table 13 shows the surface type, curvature radius, thickness, material, and conic coefficient of each lens of the optical imaging lens of Example 5, where the units of curvature radius and thickness are both millimeters (mm).

[0158]

[0159]

[0160] Table 13

[0161] As can be seen from Table 13, in Example 5, both the object-side surface and the image-side surface of any of the first lens element E1 through the eighth lens element E8 are aspherical surfaces. Table 14 shows the high-order coefficients of the various aspherical mirror surfaces that can be used in Example 5, where the surface shape of each aspherical surface can be defined by Formula (1) given in Example 1 above.

[0162] Face number A4 A6 A8 A10 A12 A14 A16 A18 A20 S1 -4.4774E-03 3.0680E-04 -7.4500E-03 1.4017E-02 -1.7730E-02 1.2743E-02 -5.3400E-03 1.1020E-03 -7.8000E-05 S2 2.2984E-02 -1.1764E-02 7.2277E-02 -1.2343E-01 1.3037E-01 -1.0325E-01 5.3198E-02 -1.4950E-02 1.7310E-03 S3 2.1876E-02 -1.4148E-02 1.1707E-01 -2.1224E-01 2.3055E-01 -1.7191E-01 8.1945E-02 -2.1520E-02 2.3250E-03 S4 1.3823E-02 1.1017E-02 2.2834E-02 -8.9820E-02 1.3515E-01 -1.1785E-01 6.2210E-02 -1.8580E-02 2.3930E-03 S5 -9.2964E-03 6.0066E-02 1.0820E-01 -6.5956E-01 1.5121E+00 -1.9764E+00 1.5373E+00 -6.6522E-01 1.2380E-01 S6 -1.2924E-02 9.0184E-02 4.2991E-02 -1.8547E-01 -2.2500E-01 1.9092E+00 -3.3864E+00 2.6055E+00 -7.4151E-01 S7 -1.3582E-01 1.1857E-02 -8.7980E-02 3.4191E-01 -5.7536E-01 6.3588E-01 -4.2886E-01 1.6801E-01 -3.0570E-02 S8 -1.1970E-01 4.3172E-02 -2.3871E-01 7.4775E-01 -1.1916E+00 1.1760E+00 -7.1505E-01 2.4816E-01 -3.7550E-02 S9 2.4051E-02 -1.4314E-01 2.9089E-01 -3.5692E-01 3.4760E-01 -2.7292E-01 1.4750E-01 -4.5600E-02 5.9510E-03 S10 4.2936E-02 -1.5346E-01 3.0584E-01 -3.7046E-01 3.1391E-01 -1.9178E-01 7.9224E-02 -1.9250E-02 2.0360E-03 S11 -9.8379E-02 -1.0458E-01 2.9246E-01 -4.4391E-01 4.4432E-01 -2.7913E-01 1.0435E-01 -2.1100E-02 1.7760E-03 S12 -2.4196E-01 2.6549E-01 -2.3776E-01 1.2869E-01 -3.9820E-02 6.1080E-03 -1.1000E-04 -9.4000E-05 9.0400E-06 S13 -2.4581E-01 4.5523E-01 -5.0171E-01 3.3737E-01 -1.4865E-01 4.3985E-02 -8.4600E-03 9.5000E-04 -4.7000E-05 S14 -1.7456E-01 3.1015E-01 -3.5529E-01 2.4128E-01 -1.0626E-01 3.1211E-02 -5.8800E-03 6.3500E-04 -3.0000E-05 S15 7.2310E-03 3.3755E-02 -5.4830E-02 2.0397E-02 6.7900E-04 -2.1700E-03 5.6100E-04 -6.0000E-05 2.4300E-06 S16 -1.3568E-01 1.4354E-01 -9.7710E-02 3.9253E-02 -9.4800E-03 1.3820E-03 -1.2000E-04 5.5500E-06 -1.1000E-07

[0163] Table 14

[0164] Table 15 shows the effective focal lengths f1 to f8 of each lens in Example 5, the total effective focal length f of the optical imaging lens, the distance TTL on the optical axis from the object-side surface S1 of the first lens E1 to the imaging surface S19, half the diagonal length of the effective pixel area on the imaging surface S19 ImgH, and half the maximum field of view (semi-FOV).

[0165]

[0166]

[0167] Table 15

[0168] Figure 10A 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 passing through the lens. Figure 10B The astigmatism curve of the optical imaging lens of Example 5 is shown, which represents the meridional field curvature and the sagittal field curvature. Figure 10C The distortion curve of the optical imaging lens of Example 5 is shown, which represents the distortion magnitude value under different fields of view. Figure 10D The chromatic aberration curve of the optical imaging lens of Example 5 is shown, which represents the deviation of different image heights on the imaging surface after the light passes through the lens. 10A to 10D It can be seen that the optical imaging lens provided in Example 5 can achieve good imaging quality.

[0169] Example 6

[0170] The following reference Figures 11 to 12D An optical imaging lens according to Example 6 of the present application is described. Figure 11 A schematic structural diagram of an optical imaging lens according to Example 6 of the present application is shown.

[0171] like Figure 11 As shown, the optical imaging lens according to an exemplary embodiment of the present application includes, in order from the object side to the image side along the optical axis: a first lens E1, a second lens E2, a third lens E3, a fourth lens E4, a fifth lens E5, a sixth lens E6, a seventh lens E7, an eighth lens E8, a filter E9 and an imaging surface S19.

[0172] The first lens E1 has positive focal power, with its object-side surface S1 being convex and its image-side surface S2 being concave. The second lens E2 has positive focal power, with its object-side surface S3 being convex and its image-side surface S4 being convex. The third lens E3 has negative focal power, with its object-side surface S5 being concave and its image-side surface S6 being concave. The fourth lens E4 has positive focal power, with its object-side surface S7 being concave and its image-side surface S8 being convex. The fifth lens E5 has negative focal power, with its object-side surface S9 being concave and its image-side surface S10 being convex. The sixth lens E6 has negative focal power, with its object-side surface S11 being concave and its image-side surface S12 being concave. The seventh lens E7 has negative focal power, with its object-side surface S13 being convex and its image-side surface S14 being concave. The eighth lens E8 has positive focal power, with its object-side surface S15 being convex and its image-side surface S16 being concave. The filter E9 has an object-side surface S17 and an image-side surface S18. Light from the object passes through the surfaces S1 to S18 in sequence and is finally imaged on the imaging surface S19.

[0173] The optical imaging lens in this embodiment may also be provided with a diaphragm for limiting the light beam to improve imaging quality.

[0174] Table 16 shows the surface type, curvature radius, thickness, material, and conic coefficient of each lens of the optical imaging lens of Example 6, where the units of curvature radius and thickness are both millimeters (mm).

[0175]

[0176]

[0177] Table 16

[0178] As can be seen from Table 16, in Example 6, both the object-side surface and the image-side surface of any of the first lens element E1 through the eighth lens element E8 are aspherical surfaces. Table 17 shows the high-order coefficients of the various aspherical mirror surfaces that can be used in Example 6, where the surface shape of each aspherical surface can be defined by Formula (1) given in Example 1 above.

[0179] Face number A4 A6 A8 A10 A12 A14 A16 A18 A20 S1 -4.4774E-03 3.0680E-04 -7.4500E-03 1.4016E-02 -1.7730E-02 1.2743E-02 -5.3400E-03 1.1020E-03 -7.8000E-05 S2 2.2984E-02 -1.1764E-02 7.2278E-02 -1.2343E-01 1.3037E-01 -1.0325E-01 5.3198E-02 -1.4950E-02 1.7310E-03 S3 2.1876E-02 -1.4147E-02 1.1707E-01 -2.1224E-01 2.3055E-01 -1.7191E-01 8.1944E-02 -2.1510E-02 2.3250E-03 S4 1.3823E-02 1.1017E-02 2.2836E-02 -8.9830E-02 1.3516E-01 -1.1786E-01 6.2217E-02 -1.8580E-02 2.3930E-03 S5 -8.7875E-03 5.1673E-02 1.6176E-01 -8.3491E-01 1.8351E+00 -2.3150E+00 1.7263E+00 -7.0897E-01 1.2395E-01 S6 -1.3513E-02 9.8387E-02 1.1010E-03 -8.5440E-02 -3.3831E-01 1.9586E+00 -3.3870E+00 2.6059E+00 -7.4163E-01 S7 -1.3582E-01 1.1821E-02 -8.7700E-02 3.4076E-01 -5.7273E-01 6.3231E-01 -4.2601E-01 1.6678E-01 -3.0340E-02 S8 -1.1970E-01 4.3139E-02 -2.3840E-01 7.4643E-01 -1.1886E+00 1.1719E+00 -7.1187E-01 2.4681E-01 -3.7310E-02 S9 2.4034E-02 -1.4295E-01 2.9005E-01 -3.5490E-01 3.4472E-01 -2.7042E-01 1.4620E-01 -4.5220E-02 5.9060E-03 S10 4.2950E-02 -1.5360E-01 3.0640E-01 -3.7167E-01 3.1547E-01 -1.9300E-01 7.9792E-02 -1.9400E-02 2.0520E-03 S11 -9.8383E-02 -1.0455E-01 2.9232E-01 -4.4360E-01 4.4393E-01 -2.7884E-01 1.0423E-01 -2.1070E-02 1.7730E-03 S12 -2.4194E-01 2.6546E-01 -2.3770E-01 1.2862E-01 -3.9780E-02 6.0910E-03 -1.0000E-04 -9.5000E-05 9.0800E-06 S13 -1.9338E-01 2.7019E-01 -2.5231E-01 1.4498E-01 -5.3680E-02 1.3112E-02 -2.0600E-03 1.8900E-04 -7.6000E-06 S14 -1.4900E-01 1.9596E-01 -2.4328E-01 1.8395E-01 -8.5190E-02 2.4389E-02 -4.1900E-03 3.9400E-04 -1.6000E-05 S15 -7.5872E-02 1.8271E-01 -1.9780E-01 1.1652E-01 -4.1710E-02 9.3210E-03 -1.2700E-03 9.6300E-05 -3.1000E-06 S16 -1.7682E-01 2.4926E-01 -1.9317E-01 9.0653E-02 -2.7030E-02 5.1370E-03 -6.0000E-04 3.9200E-05 -1.1000E-06

[0180] Table 17

[0181] Table 18 shows the effective focal lengths f1 to f8 of each lens in Example 6, the total effective focal length f of the optical imaging lens, the distance TTL on the optical axis from the object-side surface S1 of the first lens E1 to the imaging surface S19, half the diagonal length of the effective pixel area on the imaging surface S19 ImgH, and half the maximum field of view (semi-FOV).

[0182] f1(mm) 4.15 f7(mm) -67.65 f2(mm) 10.08 f8(mm) 8.37 f3(mm) -3.93 f(mm) 7.04 f4(mm) 48.93 TTL(mm) 6.33 f5(mm) -247.51 ImgH(mm) 2.82 f6(mm) -4.27 semi-FOV(°) 21.9

[0183] Table 18

[0184] Figure 12A The axial chromatic aberration curve of the optical imaging lens of Example 6 is shown, which indicates the deviation of the focal point of light of different wavelengths passing through the lens. Figure 12B The astigmatism curve of the optical imaging lens of Example 6 is shown, which represents the meridional field curvature and the sagittal field curvature. Figure 12C The distortion curve of the optical imaging lens of Example 6 is shown, which represents the distortion magnitude value under different fields of view. Figure 12D The chromatic aberration curve of the optical imaging lens of Example 6 is shown, which represents the deviation of different image heights on the imaging surface after the light passes through the lens. 12A to 12D It can be seen that the optical imaging lens provided in Example 6 can achieve good imaging quality.

[0185] Example 7

[0186] The following reference Figures 13 to 14D An optical imaging lens according to Example 7 of the present application is described. Figure 13 A schematic structural diagram of an optical imaging lens according to Example 7 of the present application is shown.

[0187] like Figure 13 As shown, the optical imaging lens according to an exemplary embodiment of the present application includes, in order from the object side to the image side along the optical axis: a first lens E1, a second lens E2, a third lens E3, a fourth lens E4, a fifth lens E5, a sixth lens E6, a seventh lens E7, an eighth lens E8, a filter E9 and an imaging surface S19.

[0188] The first lens E1 has positive optical power, with its object-side surface S1 being convex and its image-side surface S2 being concave. The second lens E2 has positive optical power, with its object-side surface S3 being convex and its image-side surface S4 being convex. The third lens E3 has negative optical power, with its object-side surface S5 being concave and its image-side surface S6 being concave. The fourth lens E4 has positive optical power, with its object-side surface S7 being concave and its image-side surface S8 being convex. The fifth lens E5 has negative optical power, with its object-side surface S9 being concave and its image-side surface S10 being convex. The sixth lens E6 has negative optical power, with its object-side surface S11 being concave and its image-side surface S12 being concave. The seventh lens E7 has positive optical power, with its object-side surface S13 being convex and its image-side surface S14 being concave. The eighth lens E8 has negative optical power, with its object-side surface S15 being concave and its image-side surface S16 being convex. The filter E9 has an object-side surface S17 and an image-side surface S18. Light from the object passes through the surfaces S1 to S18 in sequence and is finally imaged on the imaging surface S19.

[0189] The optical imaging lens in this embodiment may also be provided with a diaphragm for limiting the light beam to improve imaging quality.

[0190] Table 19 shows the surface type, curvature radius, thickness, material, and conic coefficient of each lens of the optical imaging lens of Example 7, where the units of curvature radius and thickness are both millimeters (mm).

[0191]

[0192] Table 19

[0193] As can be seen from Table 19, in Example 7, both the object-side surface and the image-side surface of any of the first lens element E1 through the eighth lens element E8 are aspherical surfaces. Table 20 shows the high-order coefficients of the various aspherical mirror surfaces that can be used in Example 7, where the surface shape of each aspherical surface can be defined by Formula (1) given in Example 1 above.

[0194] Face number A4 A6 A8 A10 A12 A14 A16 A18 A20 S1 -4.4774E-03 3.0680E-04 -7.4500E-03 1.4017E-02 -1.7730E-02 1.2743E-02 -5.3400E-03 1.1020E-03 -7.8000E-05 S2 2.2984E-02 -1.1764E-02 7.2277E-02 -1.2343E-01 1.3037E-01 -1.0325E-01 5.3198E-02 -1.4950E-02 1.7310E-03 S3 2.1876E-02 -1.4148E-02 1.1707E-01 -2.1224E-01 2.3055E-01 -1.7191E-01 8.1945E-02 -2.1520E-02 2.3250E-03 S4 1.3823E-02 1.1017E-02 2.2834E-02 -8.9820E-02 1.3515E-01 -1.1785E-01 6.2210E-02 -1.8580E-02 2.3930E-03 S5 -8.7840E-03 5.1617E-02 1.6211E-01 -8.3594E-01 1.8367E+00 -2.3162E+00 1.7264E+00 -7.0860E-01 1.2380E-01 S6 -1.3516E-02 9.8410E-02 1.0190E-03 -8.5340E-02 -3.3822E-01 1.9582E+00 -3.3864E+00 2.6055E+00 -7.4151E-01 S7 -1.3582E-01 1.1857E-02 -8.7980E-02 3.4191E-01 -5.7536E-01 6.3588E-01 -4.2886E-01 1.6801E-01 -3.0570E-02 S8 -1.1970E-01 4.3172E-02 -2.3871E-01 7.4775E-01 -1.1916E+00 1.1760E+00 -7.1505E-01 2.4816E-01 -3.7550E-02 S9 2.4051E-02 -1.4314E-01 2.9089E-01 -3.5692E-01 3.4760E-01 -2.7292E-01 1.4750E-01 -4.5600E-02 5.9510E-03 S10 4.2936E-02 -1.5346E-01 3.0584E-01 -3.7046E-01 3.1391E-01 -1.9178E-01 7.9224E-02 -1.9250E-02 2.0360E-03 S11 -9.8379E-02 -1.0458E-01 2.9246E-01 -4.4391E-01 4.4432E-01 -2.7913E-01 1.0435E-01 -2.1100E-02 1.7760E-03 S12 -2.4196E-01 2.6549E-01 -2.3776E-01 1.2869E-01 -3.9820E-02 6.1080E-03 -1.1000E-04 -9.4000E-05 9.0400E-06 S13 -1.9232E-01 2.5910E-01 -2.1180E-01 9.9610E-02 -2.7480E-02 4.2720E-03 -3.0000E-04 -3.5000E-06 1.2100E-06 S14 1.2344E-02 -7.6490E-02 5.8213E-02 -2.3900E-02 5.5060E-03 -7.0000E-04 6.1000E-05 -6.7000E-06 4.9000E-07 S15 1.0511E-02 7.4797E-02 -1.3727E-01 9.4664E-02 -3.6200E-02 8.4150E-03 -1.1900E-03 9.3300E-05 -3.2000E-06 S16 -1.8130E-01 3.0192E-01 -2.7503E-01 1.4363E-01 -4.6360E-02 9.5060E-03 -1.2100E-03 8.7900E-05 -2.8000E-06

[0195] Table 20

[0196] Table 21 shows the effective focal lengths f1 to f8 of each lens in Example 7, the total effective focal length f of the optical imaging lens, the distance TTL on the optical axis from the object-side surface S1 of the first lens E1 to the imaging surface S19, half the diagonal length of the effective pixel area on the imaging surface S19 ImgH, and half the maximum field of view (semi-FOV).

[0197] f1(mm) 4.15 f7(mm) 11.71 f2(mm) 10.08 f8(mm) -336.10 f3(mm) -3.93 f(mm) 7.13 f4(mm) 48.55 TTL(mm) 6.30 f5(mm) -240.50 ImgH(mm) 2.81 f6(mm) -4.44 semi-FOV(°) 21.7

[0198] Table 21

[0199] Figure 14A 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 passing through the lens. Figure 14B The astigmatism curve of the optical imaging lens of Example 7 is shown, which represents the meridional field curvature and the sagittal field curvature. Figure 14C The distortion curve of the optical imaging lens of Example 7 is shown, which represents the distortion magnitude value under different fields of view. Figure 14D The 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 lens. 14A to 14D It can be seen that the optical imaging lens provided in Example 7 can achieve good imaging quality.

[0200] Example 8

[0201] The following reference Figures 15 to 16D An optical imaging lens according to Example 8 of the present application is described. Figure 15 A schematic structural diagram of an optical imaging lens according to Example 8 of the present application is shown.

[0202] like Figure 15 As shown, the optical imaging lens according to an exemplary embodiment of the present application includes, in order from the object side to the image side along the optical axis: a first lens E1, a second lens E2, a third lens E3, a fourth lens E4, a fifth lens E5, a sixth lens E6, a seventh lens E7, an eighth lens E8, a filter E9 and an imaging surface S19.

[0203] The first lens E1 has positive focal power, with its object-side surface S1 being convex and its image-side surface S2 being concave. The second lens E2 has positive focal power, with its object-side surface S3 being convex and its image-side surface S4 being convex. The third lens E3 has negative focal power, with its object-side surface S5 being concave and its image-side surface S6 being concave. The fourth lens E4 has positive focal power, with its object-side surface S7 being convex and its image-side surface S8 being convex. The fifth lens E5 has negative focal power, with its object-side surface S9 being concave and its image-side surface S10 being concave. The sixth lens E6 has negative focal power, with its object-side surface S11 being concave and its image-side surface S12 being concave. The seventh lens E7 has positive focal power, with its object-side surface S13 being convex and its image-side surface S14 being concave. The eighth lens E8 has positive focal power, with its object-side surface S15 being concave and its image-side surface S16 being convex. The filter E9 has an object-side surface S17 and an image-side surface S18. Light from the object passes through the surfaces S1 to S18 in sequence and is finally imaged on the imaging surface S19.

[0204] The optical imaging lens in this embodiment may also be provided with a diaphragm for limiting the light beam to improve imaging quality.

[0205] Table 22 shows the surface type, curvature radius, thickness, material, and conic coefficient of each lens of the optical imaging lens of Example 8, where the units of curvature radius and thickness are both millimeters (mm).

[0206]

[0207] Table 22

[0208] As can be seen from Table 22, in Example 8, both the object-side surface and the image-side surface of any of the first lens element E1 through the eighth lens element E8 are aspherical surfaces. Table 23 shows the high-order coefficients of the various aspherical mirror surfaces that can be used in Example 8, where the surface shape of each aspherical surface can be defined by Formula (1) given in Example 1 above.

[0209]

[0210]

[0211] Table 23

[0212] Table 24 shows the effective focal lengths f1 to f8 of each lens in Example 8, the total effective focal length f of the optical imaging lens, the distance TTL on the optical axis from the object-side surface S1 of the first lens E1 to the imaging surface S19, half the diagonal length of the effective pixel area on the imaging surface S19 ImgH, and half the maximum field of view (semi-FOV).

[0213] f1(mm) 4.15 f7(mm) 29.35 f2(mm) 10.08 f8(mm) 43.72 f3(mm) -3.92 f(mm) 7.20 f4(mm) 22.14 TTL(mm) 6.28 f5(mm) -31.17 ImgH(mm) 2.78 f6(mm) -4.80 semi-FOV(°) 21.1

[0214] Table 24

[0215] Figure 16A The axial chromatic aberration curve of the optical imaging lens of Example 8 is shown, which indicates the deviation of the focal point of light of different wavelengths passing through the lens. Figure 16B The astigmatism curve of the optical imaging lens of Example 8 is shown, which represents the meridional field curvature and the sagittal field curvature. Figure 16C The distortion curve of the optical imaging lens of Example 8 is shown, which represents the distortion magnitude value under different fields of view. Figure 16D The chromatic aberration curve of the optical imaging lens of Example 8 is shown, which represents the deviation of different image heights on the imaging surface after the light passes through the lens. 16A to 16D It can be seen that the optical imaging lens provided in Example 8 can achieve good imaging quality.

[0216] Example 9

[0217] The following reference Figures 17 to 18D An optical imaging lens according to Example 9 of the present application is described. Figure 17 A schematic structural diagram of an optical imaging lens according to Example 9 of the present application is shown.

[0218] like Figure 17 As shown, the optical imaging lens according to an exemplary embodiment of the present application includes, in order from the object side to the image side along the optical axis: a first lens E1, a second lens E2, a third lens E3, a fourth lens E4, a fifth lens E5, a sixth lens E6, a seventh lens E7, an eighth lens E8, a filter E9 and an imaging surface S19.

[0219] The first lens E1 has positive focal power, with its object-side surface S1 being convex and its image-side surface S2 being concave. The second lens E2 has positive focal power, with its object-side surface S3 being convex and its image-side surface S4 being convex. The third lens E3 has negative focal power, with its object-side surface S5 being concave and its image-side surface S6 being concave. The fourth lens E4 has negative focal power, with its object-side surface S7 being convex and its image-side surface S8 being concave. The fifth lens E5 has positive focal power, with its object-side surface S9 being concave and its image-side surface S10 being convex. The sixth lens E6 has negative focal power, with its object-side surface S11 being concave and its image-side surface S12 being concave. The seventh lens E7 has positive focal power, with its object-side surface S13 being convex and its image-side surface S14 being concave. The eighth lens E8 has positive focal power, with its object-side surface S15 being convex and its image-side surface S16 being concave. The filter E9 has an object-side surface S17 and an image-side surface S18. Light from the object passes through the surfaces S1 to S18 in sequence and is finally imaged on the imaging surface S19.

[0220] The optical imaging lens in this embodiment may also be provided with a diaphragm for limiting the light beam to improve imaging quality.

[0221] Table 25 shows the surface type, curvature radius, thickness, material, and conic coefficient of each lens of the optical imaging lens of Example 9, where the units of curvature radius and thickness are both millimeters (mm).

[0222]

[0223]

[0224] Table 25

[0225] As can be seen from Table 25, in Example 9, both the object-side surface and the image-side surface of any of the first lens element E1 through the eighth lens element E8 are aspherical surfaces. Table 26 shows the high-order coefficients of the various aspherical mirror surfaces that can be used in Example 9, where the surface shape of each aspherical surface can be defined by Formula (1) given in Example 1 above.

[0226] Face number A4 A6 A8 A10 A12 A14 A16 A18 A20 S1 -4.6110E-03 4.5660E-04 -7.4900E-03 1.4061E-02 -1.7810E-02 1.2798E-02 -5.3600E-03 1.1060E-03 -7.9000E-05 S2 2.2989E-02 -1.1772E-02 7.2264E-02 -1.2338E-01 1.3031E-01 -1.0320E-01 5.3181E-02 -1.4950E-02 1.7300E-03 S3 2.1872E-02 -1.4162E-02 1.1719E-01 -2.1254E-01 2.3093E-01 -1.7220E-01 8.2076E-02 -2.1550E-02 2.3290E-03 S4 1.3826E-02 1.0991E-02 2.2930E-02 -9.0020E-02 1.3539E-01 -1.1804E-01 6.2307E-02 -1.8610E-02 2.3960E-03 S5 -9.1008E-03 5.7423E-02 1.2014E-01 -6.7112E-01 1.4433E+00 -1.7256E+00 1.1801E+00 -4.2416E-01 6.0087E-02 S6 -1.3611E-02 1.0852E-01 -1.5770E-01 9.8802E-01 -4.2714E+00 1.0389E+01 -1.3988E+01 9.8681E+00 -2.8380E+00 S7 -1.3602E-01 1.1572E-02 -7.6440E-02 2.8784E-01 -4.5358E-01 4.7876E-01 -3.0954E-01 1.1825E-01 -2.1780E-02 S8 -1.1898E-01 3.2421E-02 -1.6833E-01 5.0035E-01 -6.8547E-01 5.5311E-01 -2.6000E-01 6.6196E-02 -6.8600E-03 S9 2.3401E-02 -1.3451E-01 2.4903E-01 -2.5120E-01 1.9242E-01 -1.3558E-01 7.5227E-02 -2.4760E-02 3.4180E-03 S10 4.2740E-02 -1.5346E-01 3.0966E-01 -3.8329E-01 3.3302E-01 -2.0729E-01 8.6340E-02 -2.0990E-02 2.2110E-03 S11 -9.8673E-02 -1.0334E-01 2.9071E-01 -4.4208E-01 4.4296E-01 -2.7851E-01 1.0420E-01 -2.1090E-02 1.7760E-03 S12 -2.4356E-01 2.6930E-01 -2.4459E-01 1.3603E-01 -4.4720E-02 8.1530E-03 -6.2000E-04 -2.1000E-05 4.7100E-06 S13 -1.6843E-01 2.3922E-01 -1.9571E-01 9.2992E-02 -2.7750E-02 5.5690E-03 -7.9000E-04 7.4200E-05 -3.5000E-06 S14 -6.0811E-02 -2.7759E-02 6.5381E-02 -3.8660E-02 8.0620E-03 8.2700E-04 -6.7000E-04 1.1000E-04 -6.2000E-06 S15 -1.5152E-03 -3.1036E-02 4.7944E-02 -3.6600E-02 1.5049E-02 -3.5000E-03 4.6400E-04 -3.3000E-05 9.4400E-07 S16 -6.1695E-02 9.6071E-02 -7.5840E-02 3.3630E-02 -9.5200E-03 1.8420E-03 -2.4000E-04 1.8700E-05 -6.4000E-07

[0227] Table 26

[0228] Table 27 shows the effective focal lengths f1 to f8 of each lens in Example 9, the total effective focal length f of the optical imaging lens, the distance TTL on the optical axis from the object-side surface S1 of the first lens E1 to the imaging surface S19, half the diagonal length of the effective pixel area on the imaging surface S19 ImgH, and half the maximum field of view (semi-FOV).

[0229]

[0230]

[0231] Table 27

[0232] Figure 18A The axial chromatic aberration curve of the optical imaging lens of Example 9 is shown, which indicates the deviation of the focal point of light of different wavelengths passing through the lens. Figure 18B The astigmatism curve of the optical imaging lens of Example 9 is shown, which represents the meridional field curvature and the sagittal field curvature. Figure 18C The distortion curve of the optical imaging lens of Example 9 is shown, which represents the distortion magnitude value under different fields of view. Figure 18D The chromatic aberration curve of the optical imaging lens of Example 9 is shown, which represents the deviation of different image heights on the imaging surface after the light passes through the lens. 18A to 18D It can be seen that the optical imaging lens provided in Example 9 can achieve good imaging quality.

[0233] Example 10

[0234] The following reference Figures 19 to 20D An optical imaging lens according to Example 10 of the present application is described. Figure 19 A schematic structural diagram of an optical imaging lens according to Example 10 of the present application is shown.

[0235] like Figure 19 As shown, the optical imaging lens according to an exemplary embodiment of the present application includes, in order from the object side to the image side along the optical axis: a first lens E1, a second lens E2, a third lens E3, a fourth lens E4, a fifth lens E5, a sixth lens E6, a seventh lens E7, an eighth lens E8, a filter E9 and an imaging surface S19.

[0236] The first lens E1 has positive focal power, with its object-side surface S1 being convex and its image-side surface S2 being concave. The second lens E2 has positive focal power, with its object-side surface S3 being convex and its image-side surface S4 being convex. The third lens E3 has negative focal power, with its object-side surface S5 being concave and its image-side surface S6 being concave. The fourth lens E4 has positive focal power, with its object-side surface S7 being concave and its image-side surface S8 being convex. The fifth lens E5 has negative focal power, with its object-side surface S9 being concave and its image-side surface S10 being convex. The sixth lens E6 has negative focal power, with its object-side surface S11 being concave and its image-side surface S12 being concave. The seventh lens E7 has positive focal power, with its object-side surface S13 being convex and its image-side surface S14 being convex. The eighth lens E8 has positive focal power, with its object-side surface S15 being convex and its image-side surface S16 being convex. The filter E9 has an object-side surface S17 and an image-side surface S18. Light from the object passes through the surfaces S1 to S18 in sequence and is finally imaged on the imaging surface S19.

[0237] The optical imaging lens in this embodiment may also be provided with a diaphragm for limiting the light beam to improve imaging quality.

[0238] Table 28 shows the surface type, curvature radius, thickness, material, and conic coefficient of each lens of the optical imaging lens of Example 10, where the units of curvature radius and thickness are both millimeters (mm).

[0239]

[0240]

[0241] Table 28

[0242] As can be seen from Table 28, in Example 10, both the object-side surface and the image-side surface of any of the first lens element E1 through the eighth lens element E8 are aspherical surfaces. Table 29 shows the high-order coefficients of the various aspherical mirror surfaces that can be used in Example 10, where the surface shape of each aspherical surface can be defined by Formula (1) given in Example 1 above.

[0243] Face number A4 A6 A8 A10 A12 A14 A16 A18 A20 S1 -4.4774E-03 3.0680E-04 -7.4500E-03 1.4016E-02 -1.7730E-02 1.2743E-02 -5.3400E-03 1.1020E-03 -7.8000E-05 S2 2.2984E-02 -1.1764E-02 7.2278E-02 -1.2343E-01 1.3037E-01 -1.0325E-01 5.3198E-02 -1.4950E-02 1.7310E-03 S3 2.1876E-02 -1.4147E-02 1.1707E-01 -2.1224E-01 2.3055E-01 -1.7191E-01 8.1944E-02 -2.1510E-02 2.3250E-03 S4 1.3823E-02 1.1017E-02 2.2836E-02 -8.9830E-02 1.3516E-01 -1.1786E-01 6.2217E-02 -1.8580E-02 2.3930E-03 S5 -8.7807E-03 5.1560E-02 1.6250E-01 -8.3737E-01 1.8398E+00 -2.3200E+00 1.7291E+00 -7.0962E-01 1.2395E-01 S6 -1.3516E-02 9.8428E-02 8.8100E-04 -8.4900E-02 -3.3885E-01 1.9586E+00 -3.3865E+00 2.6056E+00 -7.4154E-01 S7 -1.3582E-01 1.1820E-02 -8.7700E-02 3.4076E-01 -5.7273E-01 6.3231E-01 -4.2601E-01 1.6677E-01 -3.0340E-02 S8 -1.1970E-01 4.3139E-02 -2.3840E-01 7.4643E-01 -1.1886E+00 1.1719E+00 -7.1187E-01 2.4681E-01 -3.7310E-02 S9 2.3338E-02 -1.3451E-01 2.4986E-01 -2.5448E-01 1.9836E-01 -1.4148E-01 7.8542E-02 -2.5760E-02 3.5420E-03 S10 4.2207E-02 -1.4598E-01 2.7575E-01 -3.0697E-01 2.3577E-01 -1.3366E-01 5.3477E-02 -1.3000E-02 1.3950E-03 S11 -9.8383E-02 -1.0455E-01 2.9232E-01 -4.4360E-01 4.4393E-01 -2.7884E-01 1.0423E-01 -2.1070E-02 1.7730E-03 S12 -2.4194E-01 2.6546E-01 -2.3770E-01 1.2862E-01 -3.9780E-02 6.0910E-03 -1.0000E-04 -9.5000E-05 9.0800E-06 S13 -1.8537E-01 2.8344E-01 -2.5885E-01 1.4081E-01 -4.8160E-02 1.0595E-02 -1.4700E-03 1.1700E-04 -4.1000E-06 S14 -2.3923E-02 9.2868E-03 -3.4440E-02 3.3565E-02 -1.6950E-02 5.0060E-03 -8.6000E-04 7.9500E-05 -3.0000E-06 S15 8.0812E-02 -4.7695E-02 1.1125E-02 -3.4300E-03 1.5200E-03 -4.2000E-04 6.2900E-05 -4.9000E-06 1.6000E-07 S16 -3.0942E-02 7.8545E-02 -6.3270E-02 2.5404E-02 -6.0300E-03 8.9500E-04 -8.2000E-05 4.2800E-06 -9.8000E-08

[0244] Table 29

[0245] Table 30 shows the effective focal lengths f1 to f8 of each lens in Example 10, the total effective focal length f of the optical imaging lens, the distance TTL on the optical axis from the object-side surface S1 of the first lens E1 to the imaging surface S19, half the diagonal length of the effective pixel area on the imaging surface S19 ImgH, and half the maximum field of view (semi-FOV).

[0246] f1(mm) 4.15 f7(mm) 12.29 f2(mm) 10.08 f8(mm) 35.05 f3(mm) -3.93 f(mm) 7.01 f4(mm) 47.85 TTL(mm) 6.34 f5(mm) -216.96 ImgH(mm) 2.77 f6(mm) -4.40 semi-FOV(°) 21.6

[0247] Table 30

[0248] Figure 20A The axial chromatic aberration curve of the optical imaging lens of Example 10 is shown, which indicates the deviation of the focal point of light of different wavelengths passing through the lens. Figure 20B The astigmatism curve of the optical imaging lens of Example 10 is shown, which represents the meridional field curvature and the sagittal field curvature. Figure 20C The distortion curve of the optical imaging lens of Example 10 is shown, which represents the distortion magnitude value under different fields of view. Figure 20D The chromatic aberration curve of the optical imaging lens of Example 10 is shown, which represents the deviation of different image heights on the imaging surface after the light passes through the lens. 20A to 20D It can be seen that the optical imaging lens provided in Example 10 can achieve good imaging quality.

[0249] Example 11

[0250] The following reference Figures 21 to 22D An optical imaging lens according to Example 11 of the present application is described. Figure 21 A schematic structural diagram of an optical imaging lens according to Example 11 of the present application is shown.

[0251] like Figure 21 As shown, the optical imaging lens according to an exemplary embodiment of the present application includes, in order from the object side to the image side along the optical axis: a first lens E1, a second lens E2, a third lens E3, a fourth lens E4, a fifth lens E5, a sixth lens E6, a seventh lens E7, an eighth lens E8, a filter E9 and an imaging surface S19.

[0252] The first lens E1 has positive focal power, with its object-side surface S1 being convex and its image-side surface S2 being concave. The second lens E2 has positive focal power, with its object-side surface S3 being convex and its image-side surface S4 being convex. The third lens E3 has negative focal power, with its object-side surface S5 being concave and its image-side surface S6 being concave. The fourth lens E4 has positive focal power, with its object-side surface S7 being convex and its image-side surface S8 being convex. The fifth lens E5 has negative focal power, with its object-side surface S9 being convex and its image-side surface S10 being concave. The sixth lens E6 has negative focal power, with its object-side surface S11 being concave and its image-side surface S12 being concave. The seventh lens E7 has positive focal power, with its object-side surface S13 being convex and its image-side surface S14 being concave. The eighth lens E8 has positive focal power, with its object-side surface S15 being convex and its image-side surface S16 being convex. The filter E9 has an object-side surface S17 and an image-side surface S18. Light from the object passes through the surfaces S1 to S18 in sequence and is finally imaged on the imaging surface S19.

[0253] The optical imaging lens in this embodiment may also be provided with a diaphragm for limiting the light beam to improve imaging quality.

[0254] Table 31 shows the surface type, curvature radius, thickness, material, and conic coefficient of each lens of the optical imaging lens of Example 11, where the units of curvature radius and thickness are both millimeters (mm).

[0255]

[0256] Table 31

[0257] As can be seen from Table 31, in Example 11, both the object-side surface and the image-side surface of any of the first lens element E1 through the eighth lens element E8 are aspherical surfaces. Table 32 shows the high-order coefficients of the various aspherical mirror surfaces that can be used in Example 11, where the surface shape of each aspherical surface can be defined by Formula (1) given in Example 1.

[0258] Face number A4 A6 A8 A10 A12 A14 A16 A18 A20 S1 -4.3030E-03 -3.9700E-04 -6.6500E-03 1.3759E-02 -1.7870E-02 1.2881E-02 -5.3800E-03 1.1060E-03 -7.8000E-05 S2 2.3048E-02 -1.1520E-02 7.1458E-02 -1.2244E-01 1.2978E-01 -1.0307E-01 5.3177E-02 -1.4950E-02 1.7310E-03 S3 2.1637E-02 -1.3754E-02 1.1677E-01 -2.1214E-01 2.3054E-01 -1.7191E-01 8.1945E-02 -2.1520E-02 2.3250E-03 S4 1.3907E-02 1.0931E-02 2.2867E-02 -8.9820E-02 1.3515E-01 -1.1785E-01 6.2210E-02 -1.8580E-02 2.3930E-03 S5 -1.3258E-02 1.3250E-01 -4.2495E-01 1.4447E+00 -3.4352E+00 5.1716E+00 -4.6908E+00 2.3386E+00 -4.9213E-01 S6 -2.0746E-02 2.4573E-01 -1.2913E+00 6.3720E+00 -2.0321E+01 4.1059E+01 -5.0470E+01 3.4424E+01 -9.9661E+00 S7 -1.3837E-01 3.0054E-02 -1.0542E-01 2.7500E-01 -3.8611E-01 4.3063E-01 -3.2273E-01 1.4693E-01 -3.1050E-02 S8 -1.2297E-01 8.8240E-02 -5.2360E-01 1.6793E+00 -2.9705E+00 3.2494E+00 -2.1653E+00 8.0689E-01 -1.2864E-01 S9 2.6564E-02 -1.8275E-01 4.8562E-01 -8.5097E-01 1.0726E+00 -9.1332E-01 4.8375E-01 -1.4234E-01 1.7702E-02 S10 4.1340E-02 -1.3586E-01 2.3115E-01 -2.0603E-01 1.0620E-01 -3.4110E-02 7.9930E-03 -1.5800E-03 1.8200E-04 S11 -1.0059E-01 -1.0461E-01 3.0841E-01 -4.8945E-01 5.0656E-01 -3.2672E-01 1.2508E-01 -2.5910E-02 2.2370E-03 S12 -2.4060E-01 2.6376E-01 -2.3811E-01 1.3286E-01 -4.4920E-02 9.0690E-03 -1.0300E-03 5.7300E-05 -9.9000E-07 S13 -2.1543E-01 3.3631E-01 -3.4298E-01 2.0311E-01 -7.0690E-02 1.4173E-02 -1.4300E-03 3.1400E-05 3.6200E-06 S14 -8.1226E-02 8.9559E-02 -7.2950E-02 -1.8000E-04 2.6932E-02 -1.5300E-02 4.0470E-03 -5.4000E-04 2.9500E-05 S15 -4.7631E-02 1.3783E-01 -1.4880E-01 7.8929E-02 -2.6990E-02 6.4950E-03 -1.0700E-03 1.0600E-04 -4.7000E-06 S16 -1.6573E-01 2.4766E-01 -2.1197E-01 1.1568E-01 -4.1910E-02 9.8630E-03 -1.4300E-03 1.1500E-04 -3.8000E-06

[0259] Table 32

[0260] Table 33 shows the effective focal lengths f1 to f8 of each lens in Example 11, the total effective focal length f of the optical imaging lens, the distance TTL on the optical axis from the object-side surface S1 of the first lens E1 to the imaging surface S19, half the diagonal length of the effective pixel area on the imaging surface S19 ImgH, and half the maximum field of view (semi-FOV).

[0261] f1(mm) 4.15 f7(mm) 83.79 f2(mm) 10.08 f8(mm) 16.95 f3(mm) -3.92 f(mm) 7.05 f4(mm) 21.01 TTL(mm) 6.33 f5(mm) -31.72 ImgH(mm) 2.76 f6(mm) -4.69 semi-FOV(°) 21.4

[0262] Table 33

[0263] Figure 22A The axial chromatic aberration curve of the optical imaging lens of Example 11 is shown, which indicates the deviation of light of different wavelengths from the focal point behind the lens. Figure 22B The astigmatism curve of the optical imaging lens of Example 11 is shown, which represents the meridional field curvature and the sagittal field curvature. Figure 22C The distortion curve of the optical imaging lens of Example 11 is shown, which represents the distortion magnitude value under different fields of view. Figure 22D The chromatic aberration curve of the optical imaging lens of Example 11 is shown, which represents the deviation of the different image heights on the imaging surface after the light passes through the lens. 22A to 22D It can be seen that the optical imaging lens provided in Example 11 can achieve good imaging quality.

[0264] Example 12

[0265] The following reference Figures 23 to 24D An optical imaging lens according to Example 12 of the present application is described. Figure 23 A schematic structural diagram of an optical imaging lens according to Example 12 of the present application is shown.

[0266] like Figure 23 As shown, the optical imaging lens according to an exemplary embodiment of the present application includes, in order from the object side to the image side along the optical axis: a first lens E1, a second lens E2, a third lens E3, a fourth lens E4, a fifth lens E5, a sixth lens E6, a seventh lens E7, an eighth lens E8, a filter E9 and an imaging surface S19.

[0267] The first lens E1 has positive focal power, with its object-side surface S1 being convex and its image-side surface S2 being concave. The second lens E2 has positive focal power, with its object-side surface S3 being convex and its image-side surface S4 being convex. The third lens E3 has negative focal power, with its object-side surface S5 being concave and its image-side surface S6 being concave. The fourth lens E4 has positive focal power, with its object-side surface S7 being convex and its image-side surface S8 being convex. The fifth lens E5 has positive focal power, with its object-side surface S9 being convex and its image-side surface S10 being concave. The sixth lens E6 has negative focal power, with its object-side surface S11 being convex and its image-side surface S12 being concave. The seventh lens E7 has positive focal power, with its object-side surface S13 being convex and its image-side surface S14 being concave. The eighth lens E8 has positive focal power, with its object-side surface S15 being concave and its image-side surface S16 being convex. The filter E9 has an object-side surface S17 and an image-side surface S18. Light from the object passes through the surfaces S1 to S18 in sequence and is finally imaged on the imaging surface S19.

[0268] The optical imaging lens in this embodiment may also be provided with a diaphragm for limiting the light beam to improve imaging quality.

[0269] Table 34 shows the surface type, curvature radius, thickness, material, and conic coefficient of each lens of the optical imaging lens of Example 12, where the units of curvature radius and thickness are both millimeters (mm).

[0270]

[0271] Table 34

[0272] As can be seen from Table 34, in Example 12, both the object-side surface and the image-side surface of any of the first lens element E1 through the eighth lens element E8 are aspherical surfaces. Table 35 shows the high-order coefficients of the various aspherical mirror surfaces that can be used in Example 12, where the surface shape of each aspherical surface can be defined by Formula (1) given in Example 1 above.

[0273]

[0274]

[0275] Table 35

[0276] Table 36 shows the effective focal lengths f1 to f8 of each lens in Example 12, the total effective focal length f of the optical imaging lens, the distance TTL on the optical axis from the object-side surface S1 of the first lens E1 to the imaging surface S19, half the diagonal length of the effective pixel area on the imaging surface S19 ImgH, and half the maximum field of view (semi-FOV).

[0277] f1(mm) 4.15 f7(mm) 13.27 f2(mm) 10.08 f8(mm) 24.09 f3(mm) -3.93 f(mm) 6.83 f4(mm) 66.95 TTL(mm) 6.34 f5(mm) 5747.12 ImgH(mm) 2.70 f6(mm) -4.62 semi-FOV(°) 21.8

[0278] Table 36

[0279] Figure 24A The axial chromatic aberration curve of the optical imaging lens of Example 12 is shown, which indicates the deviation of light of different wavelengths from the focal point behind the lens. Figure 24B The astigmatism curve of the optical imaging lens of Example 12 is shown, which represents the meridional field curvature and the sagittal field curvature. Figure 24C The distortion curve of the optical imaging lens of Example 12 is shown, which represents the distortion magnitude value under different fields of view. Figure 24D The chromatic aberration curve of the optical imaging lens of Example 12 is shown, which represents the deviation of different image heights on the imaging surface after the light passes through the lens. 24A to 24D It can be seen that the optical imaging lens provided in Example 12 can achieve good imaging quality.

[0280] In summary, Examples 1 to 12 respectively satisfy the relationships shown in Table 37.

[0281] Conditional formula\Example 1 2 3 4 5 6 TTL / f 0.91 0.92 0.91 0.92 0.89 0.90 semi-FOV(°) 21.8 22.0 21.7 21.9 22.0 21.9 f3 / f6 0.90 0.88 0.89 0.94 0.81 0.92 f / (R1+R2+R3+R4) 1.71 1.70 1.56 1.81 1.75 1.73 f / f12 2.23 2.22 2.22 2.22 2.24 2.25 R12 / R13 0.34 0.38 0.36 0.37 0.15 0.40 |R5+R6| / f 1.12 1.12 1.11 1.12 1.11 1.10 (CT1+CT4+CT5)×10 / TTL 1.97 1.96 1.99 1.94 1.99 1.97 CT7 / (T78+CT8) 1.50 0.73 1.15 0.61 1.59 0.64 DT11 / DT31 1.55 1.55 1.56 1.55 1.54 1.53 DT82 / DT32 3.01 3.02 3.06 3.09 2.71 2.94 ImgH / (T34+T56) 1.86 1.87 1.83 1.94 1.86 1.89

[0282]

[0283]

[0284] Table 37

[0285] The present application also provides an imaging device, wherein the electronic photosensitive element thereof may be a charge coupled device (CCD) or a complementary metal oxide semiconductor (CMOS). The imaging device may be a standalone imaging device such as a digital camera, or an imaging module integrated into a mobile electronic device such as a mobile phone. The imaging device is equipped with the optical imaging lens described above.

[0286] The above description is merely a preferred embodiment of the present application and an illustration of the technical principles employed. Those skilled in the art should understand that the scope of the invention herein is not limited to the technical solutions formed by the specific combination of the above-mentioned technical features, but also encompasses other technical solutions formed by any combination of the above-mentioned technical features or their equivalents without departing from the inventive concept. For example, a technical solution formed by replacing the above-mentioned features with (but not limited to) technical features having similar functions disclosed in this application.

Claims

1. An optical imaging lens, in order from the object side to the image side along the optical axis, includes: The first lens, the second lens, the third lens, the fourth lens, the fifth lens, the sixth lens, the seventh lens and the eighth lens have optical power, characterized in that: The first lens has positive refractive power, its object side surface is convex, and its image side surface is concave; The second lens has positive refractive power, and its object-side surface is convex, and its image-side surface is convex; The third lens has negative optical power, and its object side surface is concave, and its image side surface is concave; The fourth lens has positive or negative optical power; The sixth lens has negative optical power, and its image side surface is concave; The object side surface of the seventh lens is a convex surface; The optical imaging lens has eight lenses with optical power; The fifth lens has positive refractive power, the eighth lens has positive refractive power, and the seventh lens has positive refractive power or negative refractive power; or the fifth lens has negative refractive power, and at least one of the seventh lens and the eighth lens has positive refractive power; Half of the diagonal length of the effective pixel area on the imaging plane of the optical imaging lens, ImgH, the distance T34 between the third lens and the fourth lens on the optical axis, and the distance T56 between the fifth lens and the sixth lens on the optical axis satisfy 1.81≤ImgH / (T34+T56)≤1.

94.

2. The optical imaging lens according to claim 1, wherein: A center thickness CT1 of the first lens on the optical axis, a center thickness CT4 of the fourth lens on the optical axis, a center thickness CT5 of the fifth lens on the optical axis, and a distance TTL from the object-side surface of the first lens to the imaging surface of the optical imaging lens on the optical axis satisfy 1.94≤(CT1+CT4+CT5)×10 / TTL≤2.

00.

3. The optical imaging lens according to claim 1, wherein: A center thickness CT7 of the seventh lens on the optical axis, a distance T78 between the seventh lens and the eighth lens on the optical axis, and a center thickness CT8 of the eighth lens on the optical axis satisfy 0.6<CT7 / (T78+CT8)<1.

6.

4. The optical imaging lens according to claim 1, wherein: The total effective focal length f of the optical imaging lens, the curvature radius R1 of the object side surface of the first lens, the curvature radius R2 of the image side surface of the first lens, the curvature radius R3 of the object side surface of the second lens, and the curvature radius R4 of the image side surface of the second lens satisfy 1.5<f / (R1+R2+R3+R4)≤1.

81.

5. The optical imaging lens according to claim 1, wherein: A curvature radius R5 of the object-side surface of the third lens, a curvature radius R6 of the image-side surface of the third lens, and a total effective focal length f of the optical imaging lens satisfy 1.07≤|R5+R6| / f≤1.

14.

6. The optical imaging lens according to claim 1, wherein: A curvature radius R12 of the image-side surface of the sixth lens and a curvature radius R13 of the object-side surface of the seventh lens satisfy 0.15≤R12 / R13≤0.

42.

7. The optical imaging lens according to any one of claims 2 to 6, wherein: A distance TTL from the object-side surface of the first lens to the imaging surface of the optical imaging lens on the optical axis and a total effective focal length f of the optical imaging lens satisfy 0.87≤TTL / f≤0.

93.

8. The optical imaging lens according to claim 1, wherein: The total effective focal length f of the optical imaging lens and the combined focal length f12 of the first lens and the second lens satisfy 2.18≤f / f12≤2.

30.

9. The optical imaging lens according to claim 1, wherein: The effective focal length f3 of the third lens and the effective focal length f6 of the sixth lens satisfy 0.8<f3 / f6≤0.

94.

10. The optical imaging lens according to claim 1, wherein: Half of the maximum field of view (semi-FOV) of the optical imaging lens satisfies 21.1°≤semi-FOV≤22.0°.

11. The optical imaging lens according to claim 1 or 10, wherein: The maximum effective semi-aperture DT11 of the object-side surface of the first lens and the maximum effective semi-aperture DT31 of the object-side surface of the third lens satisfy 1.50≤DT11 / DT31≤1.

58.

12. The optical imaging lens according to claim 1 or 10, wherein: The maximum effective semi-aperture DT82 of the image-side surface of the eighth lens and the maximum effective semi-aperture DT32 of the image-side surface of the third lens satisfy 2.54≤DT82 / DT32≤3.19.

Images