Optical imaging lens

Abstract

The present application discloses an optical imaging lens, comprising, in order from the object side to the image side along the optical axis: a first lens having positive optical power, whose object-side surface is convex and whose image-side surface is concave; a second lens having negative optical power, whose image-side surface is concave; a third lens having optical power, whose object-side surface is convex and whose image-side surface is concave; a fourth lens having optical power; a fifth lens having optical power; a sixth lens having negative optical power; a seventh lens having positive optical power, whose object-side surface is convex; and an eighth lens having negative optical power, whose object-side surface is concave and whose image-side surface is concave. The optical imaging lens comprises eight lenses having optical power. The optical imaging lens satisfies the following conditions: half the diagonal length of an effective pixel area on an imaging plane of the optical imaging lens, ImgH, satisfies the following condition: 5.80 mm < ImgH; and the central thickness CT5 of the fifth lens and the central thickness CT7 of the seventh lens on the optical axis satisfy the following condition: 3.00 < (CT5 + CT7) / (CT7 - CT5) < 7.00.

Description

[0001] Divisional application statement

[0002] This application is a divisional application of the Chinese invention patent application with the invention name “Optical Imaging Lens” and application number 201910804371.8 filed on August 28, 2019. Technical Field

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

[0004] With the rapid development of portable electronic devices such as smartphones and tablets in recent years, the demands for imaging lenses used in these devices have become increasingly stringent. On the one hand, people are pursuing ever-smaller, thinner, and lighter portable electronic devices. On the other hand, they are demanding high-definition imaging lenses. This requires the use of optical imaging lenses that simultaneously meet the requirements of miniaturization and high image quality. Furthermore, traditional imaging lenses with a limited number of lenses struggle to achieve large image areas, failing to meet current demands for everyday photography. Summary of the Invention

[0005] The present application provides an optical imaging 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, which includes, in order from the object side to the image side along the optical axis: a first lens having positive optical power, whose object-side surface is convex and whose image-side surface is concave; a second lens having negative optical power, whose image-side surface is concave; a third lens having optical power, whose object-side surface is convex and whose image-side surface is concave; a fourth lens having optical power; a fifth lens having optical power; a sixth lens having optical power; a seventh lens having positive optical power, whose object-side surface is convex; and an eighth lens having negative optical power, whose object-side surface is concave and whose image-side surface is concave.

[0007] In one embodiment, the optical imaging lens may further include a stop disposed between the object side and the first lens.

[0008] In one embodiment, half of the diagonal length ImgH of the effective pixel area on the imaging plane of the optical imaging lens may satisfy the following: 5.80 mm < ImgH.

[0009] In one embodiment, the effective focal length f7 of the seventh lens and the total effective focal length f of the optical imaging lens may satisfy: 1.00<f7 / f<2.00.

[0010] In one embodiment, the distance TTL from the object-side surface of the first lens to the imaging plane of the optical imaging lens on the optical axis and half the diagonal length of the effective pixel area on the imaging plane of the optical imaging lens ImgH may satisfy the following relationship: TTL / ImgH<1.10.

[0011] In one embodiment, a curvature radius R13 of the object-side surface of the seventh lens element and a curvature radius R16 of the image-side surface of the eighth lens element may satisfy the following relationship: 0.50<R16 / R13<2.00.

[0012] In one embodiment, the curvature radius R2 of the image-side surface of the first lens and the total effective focal length f of the optical imaging lens may satisfy: 1.00<R2 / f<3.50.

[0013] In one embodiment, a center thickness CT4 of the fourth lens on the optical axis and a spacing distance T45 between the fourth lens and the fifth lens on the optical axis may satisfy: 2.00<CT4 / T45<5.00.

[0014] In one embodiment, a curvature radius R2 of the image-side surface of the first lens and a curvature radius R4 of the image-side surface of the second lens may satisfy: 2.00<(R4+R2) / (R2-R4)<5.00.

[0015] In one embodiment, a center thickness CT5 of the fifth lens on the optical axis and a center thickness CT7 of the seventh lens on the optical axis may satisfy: 3.00<(CT5+CT7) / (CT7-CT5)<7.00.

[0016] In one embodiment, the on-axis distance SAG61 from the intersection of the object side surface of the sixth lens and the optical axis to the effective radius vertex of the object side surface of the sixth lens and the on-axis distance SAG62 from the intersection of the image side surface of the sixth lens and the optical axis to the effective radius vertex of the image side surface of the sixth lens may satisfy: 9.00<(SAG62+SAG61) / (SAG62-SAG61)<20.00.

[0017] In one embodiment, the maximum effective radius DT82 of the image-side surface of the eighth lens and half the diagonal length of the effective pixel area on the imaging plane of the optical imaging lens ImgH may satisfy the following: 0.74<DT82 / ImgH.

[0018] In one embodiment, the sum of the spacing distances ΣAT between any two adjacent lenses from the first to the eighth lenses on the optical axis and the distance TD from the object side surface of the first lens to the image side surface of the eighth lens on the optical axis may satisfy: ΣAT / TD<0.40.

[0019] Another aspect of the present application provides an optical imaging lens, which includes, in order from the object side to the image side along the optical axis: a first lens having positive optical power, whose object-side surface is convex and whose image-side surface is concave; a second lens having negative optical power, whose image-side surface is concave; a third lens having optical power, whose object-side surface is convex and whose image-side surface is concave; a fourth lens having optical power; a fifth lens having optical power; a sixth lens having negative optical power; a seventh lens having positive optical power, whose object-side surface is convex; and an eighth lens having negative optical power, whose The object-side surface is concave, and the image-side surface is concave; the third lens has the same positive and negative optical power as the fourth lens, and has opposite positive and negative optical power to the fifth lens; the number of lenses having optical power in the optical imaging lens is eight; wherein, half of the diagonal length of the effective pixel area on the imaging plane of the optical imaging lens, ImgH, satisfies the following: 5.80mm<ImgH; and the center thickness CT5 of the fifth lens on the optical axis and the center thickness CT7 of the seventh lens on the optical axis satisfy the following: 3.00<(CT5+CT7) / (CT7-CT5)<7.00.

[0020] The optical imaging lens provided herein rationally matches the optical power and surface shape of each lens in the optical system, effectively balancing the aberrations of the optical system and improving imaging quality. The optical imaging lens provided herein satisfies 5.80mm<ImgH, has a large imaging surface, and can have a high resolution. The optical imaging lens provided herein also satisfies 3.00<(CT5+CT7) / (CT7-CT5)<7.00. The rationally set ratio between the center thickness of the fifth lens and the center thickness of the seventh lens on the optical axis facilitates reasonable control of the spatial proportions of the fifth and seventh lenses, ensures the assembly processability of the optical imaging lens, and facilitates miniaturization of the optical imaging lens.

[0021] The optical imaging lens provided herein includes multiple lenses, such as first to eighth lenses. By properly setting the ratio of the distance on the optical axis from the object-side surface of the first lens to the imaging plane of the optical imaging lens to half the diagonal length of the effective pixel area on the imaging plane of the optical imaging lens, optimizing the optical power and surface shape of each lens, and properly matching them, the optical imaging lens is made compact and lightweight while having a larger imaging surface and high image clarity. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] 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:

[0023] Figure 1 1 shows a schematic structural diagram of an optical imaging lens according to Example 1 of the present application;

[0024] 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;

[0025] Figure 3 1 shows a schematic structural diagram of an optical imaging lens according to Example 2 of the present application;

[0026] 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;

[0027] Figure 5 1 shows a schematic structural diagram of an optical imaging lens according to Example 3 of the present application;

[0028] 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;

[0029] Figure 7 1 shows a schematic structural diagram of an optical imaging lens according to Example 4 of the present application;

[0030] 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;

[0031] Figure 9 1 shows a schematic structural diagram of an optical imaging lens according to Example 5 of the present application;

[0032] 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;

[0033] Figure 11 1 shows a schematic structural diagram of an optical imaging lens according to Example 6 of the present application;

[0034] 12A to 12D The axial chromatic aberration curve, astigmatism curve, distortion curve, and lateral chromatic aberration curve of the optical imaging lens of Example 6 are respectively shown. DETAILED DESCRIPTION

[0035] 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.

[0036] 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.

[0037] 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.

[0038] 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.

[0039] 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.

[0040] 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.

[0041] 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.

[0042] The features, principles and other aspects of the present application are described in detail below.

[0043] An optical imaging lens according to an exemplary embodiment of the present application may include 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. Air spaces may be provided between adjacent lenses.

[0044] In an exemplary embodiment, the first lens may have positive power, with a convex object-side surface and a concave image-side surface; the second lens may have negative power, with a concave image-side surface; the third lens may have positive or negative power, with a convex object-side surface and a concave image-side surface; the fourth lens may have positive or negative power; the fifth lens may have positive or negative power; the sixth lens may have positive or negative power; the seventh lens may have positive power, with a convex object-side surface; and the eighth lens may have negative power, with a concave object-side surface and a concave image-side surface. Properly matching the power and surface shape of each lens in an optical system can effectively balance the aberrations of the optical system and improve imaging quality.

[0045] In an exemplary embodiment, the distance TTL from the object-side surface of the first lens to the imaging plane of the optical imaging lens on the optical axis and half the diagonal length of the effective pixel area on the imaging plane of the optical imaging lens, ImgH, may satisfy the following relationship: TTL / ImgH < 1.10. Specifically, 1.0 < TTL / ImgH < 1.10. Properly setting the ratio between the distance TTL from the object-side surface of the first lens to the imaging plane of the optical imaging lens on the optical axis and half the diagonal length of the effective pixel area on the imaging plane of the optical imaging lens facilitates achieving a thinner and lighter optical imaging lens and a larger imaging plane.

[0046] In an exemplary embodiment, half the diagonal length of the effective pixel area on the imaging plane of the optical imaging lens, ImgH, may satisfy the following conditions: 5.80 mm < ImgH, specifically, 5.80 mm < ImgH < 5.90 mm. An optical imaging lens that satisfies 5.80 mm < ImgH has a larger imaging plane and can achieve higher resolution.

[0047] In an exemplary embodiment, the effective focal length f7 of the seventh lens and the total effective focal length f of the optical imaging lens may satisfy the following relationship: 1.00 < f7 / f < 2.00, specifically, 1.00 < f7 / f < 1.60. Properly setting the ratio of the effective focal length of the seventh lens to the total effective focal length of the optical imaging lens ensures that the optical system has a high aberration correction capability. Furthermore, satisfying this ratio also helps control the size of the optical imaging lens and avoids excessive concentration of the lens' optical power. In conjunction with other lenses, lens aberrations can be better corrected.

[0048] In an exemplary embodiment, the radius of curvature R13 of the object-side surface of the seventh lens element and the radius of curvature R16 of the image-side surface of the eighth lens element may satisfy the following relationship: 0.50 < R16 / R13 < 2.00. Specifically, 0.80 < R16 / R13 < 2.00. Properly setting the ratio of the radius of curvature of the object-side surface of the seventh lens element to the radius of curvature of the image-side surface of the eighth lens element helps control the distortion of the optical imaging lens within an acceptable range, thereby achieving better imaging quality.

[0049] In an exemplary embodiment, the radius of curvature R2 of the image-side surface of the first lens element and the total effective focal length f of the optical imaging lens may satisfy the following relationship: 1.00 < R2 / f < 3.50, specifically, 1.60 < R2 / f < 3.10. Setting the ratio of the radius of curvature of the image-side surface of the first lens element to the total effective focal length of the optical imaging lens within a reasonable range facilitates sufficient light converging capability at the object-side end of the optical imaging lens, thereby adjusting the focus position of the light beam and effectively shortening the overall length of the optical imaging lens.

[0050] In an exemplary embodiment, the center thickness CT4 of the fourth lens on the optical axis and the distance T45 between the fourth and fifth lenses on the optical axis may satisfy the following: 2.00 < CT4 / T45 < 5.00. Specifically, 2.40 < CT4 / T45 < 4.60. Properly setting the ratio between the center thickness of the fourth lens on the optical axis and the distance between the fourth and fifth lenses on the optical axis not only facilitates uniform lens size distribution and ensures lens assembly stability, but also helps reduce aberrations in the entire optical system and shorten the overall length of the optical imaging lens.

[0051] In an exemplary embodiment, the radius of curvature R2 of the image-side surface of the first lens element and the radius of curvature R4 of the image-side surface of the second lens element may satisfy the following relationship: 2.00 < (R4 + R2) / (R2 - R4) < 5.00. Specifically, 2.30 < (R4 + R2) / (R2 - R4) < 4.90. Properly arranging the relationship between the radius of curvature of the image-side surface of the first lens element and the radius of curvature of the image-side surface of the second lens element facilitates correcting chromatic aberration in the optical imaging lens and achieving a balance between various aberrations.

[0052] In an exemplary embodiment, the center thickness CT5 of the fifth lens element and the center thickness CT7 of the seventh lens element on the optical axis may satisfy the following: 3.00 < (CT5 + CT7) / (CT7 - CT5) < 7.00. Specifically, 3.40 < (CT5 + CT7) / (CT7 - CT5) < 7.00. Properly setting the ratio of the center thickness of the fifth lens element to the center thickness of the seventh lens on the optical axis not only facilitates proper control of the spatial distribution of the fifth and seventh lenses, ensuring the assembly processability of the optical imaging lens, but also facilitates miniaturization of the optical imaging lens.

[0053] In an exemplary embodiment, the on-axis distance SAG61 from the intersection of the object side surface of the sixth lens and the optical axis to the effective radius vertex of the object side surface of the sixth lens and the on-axis distance SAG62 from the intersection of the image side surface of the sixth lens and the optical axis to the effective radius vertex of the image side surface of the sixth lens may satisfy: 9.00<(SAG62+SAG61) / (SAG62-SAG61)<20.00. Specifically, 9.40<(SAG62+SAG61) / (SAG62-SAG61)<19.70. Reasonably setting the proportional relationship between the on-axis distance from the intersection of the object side surface of the sixth lens and the optical axis to the effective radius vertex of the object side surface of the sixth lens and the on-axis distance from the intersection of the image side surface of the sixth lens and the optical axis to the effective radius vertex of the image side surface of the sixth lens is beneficial to adjusting the main ray angle of the optical imaging lens, and can effectively improve the relative brightness of the optical imaging lens and enhance the clarity of the image surface.

[0054] In an exemplary embodiment, the maximum effective radius DT82 of the image-side surface of the eighth lens element and half the diagonal length of the effective pixel area on the imaging plane of the optical imaging lens, ImgH, may satisfy the following relationship: 0.74 < DT82 / ImgH. Specifically, 0.74 < DT82 / ImgH < 0.80. Properly setting the maximum effective radius of the image-side surface of the eighth lens element and its ratio to half the diagonal length of the effective pixel area on the imaging plane of the optical imaging lens facilitates reducing the size of the optical imaging lens while maintaining a large image plane.

[0055] In an exemplary embodiment, the sum of the optical axis spacing distances ∑AT between any two adjacent lenses among the first through eighth lenses and the optical axis spacing TD between the object-side surface of the first lens and the image-side surface of the eighth lens may satisfy the following relationship: ∑AT / TD < 0.40. Specifically, 0.35 < ∑AT / TD < 0.40. Controlling the ratio of the sum of the optical axis spacing distances between any two adjacent lenses among the first through eighth lenses to the optical axis spacing between the object-side surface of the first lens and the image-side surface of the eighth lens to be less than 0.4 not only facilitates proper control of the spacing between lens surfaces, prevents excessive light deflection, but also reduces the manufacturing difficulty of the optical imaging lens.

[0056] In an exemplary embodiment, the optical imaging lens may further include an aperture. The aperture may be positioned appropriately as needed. For example, the aperture may be positioned between the object side and the first lens element. Optionally, the optical imaging lens may further include a filter for correcting color deviation and / or a protective glass for protecting the photosensitive element located on the imaging surface.

[0057] This application proposes an optical imaging lens with a large image surface, high resolution, and ultra-thin design. The optical imaging lens according to the aforementioned embodiment of this application can utilize multiple lens elements, such as the eight lens elements described above. By rationally allocating the focal power, surface shape, center thickness of each lens, and on-axis spacing between lenses, incident light can be effectively focused, reducing the overall optical length of the imaging lens and improving its manufacturability, making the optical imaging lens more amenable to production and processing.

[0058] In an exemplary embodiment, at least one of the mirror surfaces of each lens is an aspherical mirror surface, that is, at least one of the mirror surfaces from the object side surface of the first lens to the image side surface of 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, with 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, 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. 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.

[0059] 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.

[0060] 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.

[0061] Specific embodiments of the optical imaging lens applicable to the above-mentioned embodiments will be further described below with reference to the accompanying drawings.

[0062] Example 1

[0063] The following reference Figures 1 to 2D The optical imaging lens according to Example 1 of the present application is described. Figure 12 is a schematic structural diagram of an optical imaging lens according to Example 1 of the present application.

[0064] like Figure 1 As shown, the optical imaging lens includes, from the object side to the image side along the optical axis, an aperture STO, a first lens E1, a second lens E2, a third lens E3, a fourth lens E4, a fifth lens E5, a sixth lens E6, a seventh lens E7, an eighth lens E8, a filter E9 and an imaging surface S19.

[0065] The first lens E1 has positive optical power, with its object-side surface S1 being convex and its image-side surface S2 being concave. The second lens E2 has negative optical power, with its object-side surface S3 being convex and its image-side surface S4 being concave. The third lens E3 has positive optical power, with its object-side surface S5 being convex and its image-side surface S6 being concave. The fourth lens E4 has positive optical power, with its object-side surface S7 being convex 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 convex 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 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.

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

[0067]

[0068] In this embodiment, the total effective focal length of the optical imaging lens is f = 5.98 mm, the distance TTL on the optical axis from the object-side surface S1 of the first lens element E1 to the imaging surface S19 is 6.70 mm, half the diagonal length of the effective pixel area on the imaging surface S19 is ImgH = 5.85 mm, the maximum half field of view Semi-FOV of the optical imaging lens is 43.1°, and the aperture number Fno of the optical imaging lens is 2.38.

[0069] In Example 1, the object-side surface and the image-side surface of any lens from the first lens E1 to the eighth lens E8 are both aspherical surfaces. The surface shape x of each aspherical lens can be defined by, but is not limited to, the following aspherical surface formula:

[0070]

[0071] 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 conic coefficient; 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, A29, 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 、A 12 、A 14 、A 16 、A 18 and A 20 .

[0072] Face number A4 A6 A8 A10 A12 A14 A16 A18 A20 S1 -5.4859E-04 -5.4631E-03 2.1986E-02 -5.8712E-02 9.0736E-02 -8.6074E-02 4.8974E-02 -1.5329E-02 2.0177E-03 S2 -1.3338E-02 1.4414E-02 -6.8589E-02 1.9237E-01 -3.2776E-01 3.5269E-01 -2.3224E-01 8.4880E-02 -1.3159E-02 S3 -1.5737E-02 1.7042E-02 -6.1473E-02 1.4473E-01 -2.2419E-01 2.3434E-01 -1.5859E-01 6.1798E-02 -1.0396E-02 S4 3.8511E-02 -5.4449E-02 3.6821E-02 -7.9497E-02 1.5315E-01 -1.7061E-01 1.0557E-01 -3.1414E-02 2.9367E-03 S5 -2.1181E-02 2.3272E-03 -8.0976E-03 5.7426E-04 1.9454E-02 8.4129E-03 -4.2442E-02 3.3753E-02 -8.8407E-03 S6 -1.8144E-02 1.0174E-02 -3.2428E-02 1.4686E-01 -3.1590E-01 4.4500E-01 -3.7265E-01 1.6729E-01 -3.0926E-02 S7 8.3027E-05 -2.9359E-02 7.1795E-02 -2.1537E-01 4.0395E-01 -4.6500E-01 3.2967E-01 -1.3354E-01 2.3733E-02 S8 1.8034E-02 -2.4543E-02 5.8504E-03 6.6601E-03 -1.9937E-02 1.9579E-02 -8.7810E-03 1.3406E-03 -1.2034E-06 S9 -1.5738E-02 1.1863E-02 -1.0163E-01 2.3838E-01 -3.1510E-01 2.5552E-01 -1.2469E-01 3.3885E-02 -4.0349E-03 S10 -3.7375E-02 -2.9621E-04 -8.5883E-03 8.8689E-03 -2.5185E-04 -4.9254E-03 4.0243E-03 -1.3087E-03 1.5285E-04 S11 -5.6058E-02 1.9753E-02 -4.0892E-03 -1.7633E-02 1.9797E-02 -1.1269E-02 3.7452E-03 -6.7710E-04 5.1655E-05 S12 -7.2998E-02 3.8383E-02 -1.4797E-02 9.6141E-04 1.4635E-03 -6.6794E-04 1.4419E-04 -1.6636E-05 8.1811E-07 S13 2.2214E-03 -3.0141E-02 1.4551E-02 -4.2019E-03 7.9042E-04 -1.0170E-04 9.2611E-06 -5.4882E-07 1.5305E-08 S14 1.8284E-02 -3.2808E-02 1.4104E-02 -3.6573E-03 6.1303E-04 -6.7197E-05 4.7167E-06 -1.9371E-07 3.5351E-09 S15 -2.5517E-02 1.3949E-02 -3.4159E-03 4.9878E-04 -4.5328E-05 2.6040E-06 -9.2368E-08 1.8524E-09 -1.6090E-11 S16 -3.2229E-02 1.1032E-02 -2.3566E-03 3.1676E-04 -2.7613E-05 1.5483E-06 -5.3629E-08 1.0439E-09 -8.7520E-12

[0073] Table 2

[0074] 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 values ​​corresponding to different image heights. 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.

[0075] Example 2

[0076] The following reference Figures 3 to 4D The optical imaging lens according to Example 2 of the present application is described. Figure 3 A schematic structural diagram of an optical imaging lens according to Example 2 of the present application is shown.

[0077] like Figure 3 As shown, the optical imaging lens includes, from the object side to the image side along the optical axis, an aperture STO, a first lens E1, a second lens E2, a third lens E3, a fourth lens E4, a fifth lens E5, a sixth lens E6, a seventh lens E7, an eighth lens E8, a filter E9 and an imaging surface S19.

[0078] The first lens E1 has positive optical power, with its object-side surface S1 being convex and its image-side surface S2 being concave. The second lens E2 has negative optical power, with its object-side surface S3 being convex and its image-side surface S4 being concave. The third lens E3 has positive optical power, with its object-side surface S5 being convex and its image-side surface S6 being concave. The fourth lens E4 has 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 convex and its image-side surface S10 being concave. The sixth lens E6 has negative optical power, with its object-side surface S11 being convex 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 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.

[0079] In this embodiment, the total effective focal length of the optical imaging lens is f = 6.01 mm, the distance TTL on the optical axis from the object-side surface S1 of the first lens element E1 to the imaging surface S19 is 6.70 mm, half the diagonal length of the effective pixel area on the imaging surface S19 is ImgH = 5.85 mm, the maximum half field of view Semi-FOV of the optical imaging lens is 42.5°, and the aperture number Fno of the optical imaging lens is 2.38.

[0080] Table 3 shows the basic parameters of the optical imaging lens of Example 2, wherein the units of curvature radius, thickness / distance, and focal length are all millimeters (mm).

[0081]

[0082] Table 3

[0083] In Example 2, the object side surface and the image side surface of any lens from the first lens E1 to the eighth lens E8 are all aspherical surfaces. Table 4 below lists the high-order coefficients A4, A6, A8, A 10 、A 12 、A 14 、A 16 、A 18 and A 20 .

[0084]

[0085]

[0086] Table 4

[0087] Figure 4AThe 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 values ​​corresponding to different image heights. 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.

[0088] Example 3

[0089] The following reference Figures 5 to 6D The 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.

[0090] like Figure 5 As shown, the optical imaging lens includes, from the object side to the image side along the optical axis, an aperture STO, a first lens E1, a second lens E2, a third lens E3, a fourth lens E4, a fifth lens E5, a sixth lens E6, a seventh lens E7, an eighth lens E8, a filter E9 and an imaging surface S19.

[0091] 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 negative focal power, with its object-side surface S3 being concave and its image-side surface S4 being concave. The third lens E3 has positive focal power, with its object-side surface S5 being convex 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 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 negative focal power, with its object-side surface S15 being concave 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.

[0092] In this embodiment, the total effective focal length of the optical imaging lens is f = 6.00 mm, the distance TTL on the optical axis from the object-side surface S1 of the first lens element E1 to the imaging surface S19 is 6.70 mm, half the diagonal length of the effective pixel area on the imaging surface S19 is ImgH = 5.85 mm, the maximum half field of view Semi-FOV of the optical imaging lens is 42.5°, and the aperture number Fno of the optical imaging lens is 2.37.

[0093] Table 5 shows the basic parameters of the optical imaging lens of Example 3, wherein the units of curvature radius, thickness / distance, and focal length are all millimeters (mm).

[0094]

[0095]

[0096] Table 5

[0097] In Example 3, the object side surface and the image side surface of any lens from the first lens E1 to the eighth lens E8 are aspherical surfaces. Table 6 below lists the high-order coefficients A4, A6, A8, A 10 、A 12 、A 14 、A 16 、A 18 and A 20 .

[0098] Face number A4 A6 A8 A10 A12 A14 A16 A18 A20 S1 8.7349E-04 -2.6918E-03 1.2110E-02 -3.6320E-02 5.9804E-02 -6.0218E-02 3.5932E-02 -1.1782E-02 1.6146E-03 S2 -3.8491E-03 -1.2194E-02 3.1654E-02 -6.2915E-02 8.4323E-02 -7.1109E-02 3.4725E-02 -8.8048E-03 8.6874E-04 S3 2.3264E-03 -1.7429E-02 4.0069E-02 -6.4279E-02 8.5625E-02 -8.1254E-02 4.7551E-02 -1.4999E-02 1.9274E-03 S4 8.5195E-03 -4.9943E-02 8.3201E-02 -1.5877E-01 2.8332E-01 -3.4275E-01 2.4876E-01 -9.8118E-02 1.6040E-02 S5 -2.2257E-02 -2.8691E-02 4.5527E-02 -4.8276E-02 1.2408E-01 -1.9197E-01 1.5614E-01 -6.5376E-02 1.0926E-02 S6 -6.5750E-04 -2.1538E-02 6.8175E-02 -1.3663E-01 2.6925E-01 -3.1624E-01 2.0798E-01 -6.9718E-02 8.9514E-03 S7 2.2356E-03 -1.6702E-03 -1.4008E-01 4.3198E-01 -7.9417E-01 9.1937E-01 -6.5208E-01 2.5747E-01 -4.3102E-02 S8 -6.5607E-03 8.2470E-02 -2.9449E-01 5.3148E-01 -6.3159E-01 4.9642E-01 -2.4722E-01 7.0193E-02 -8.6613E-03 S9 -7.1043E-02 1.3871E-01 -3.1083E-01 4.6875E-01 -4.7411E-01 3.2392E-01 -1.4151E-01 3.5256E-02 -3.8078E-03 S10 -7.6262E-02 8.5295E-02 -1.2917E-01 1.4466E-01 -1.0985E-01 5.6631E-02 -1.8237E-02 3.2233E-03 -2.3661E-04 S11 -8.1653E-02 5.8181E-02 -4.1609E-02 1.1808E-02 1.8800E-03 -3.0905E-03 1.1411E-03 -1.7682E-04 9.3784E-06 S12 -9.4416E-02 7.0487E-02 -4.1969E-02 1.6447E-02 -4.3804E-03 7.4077E-04 -6.4457E-05 9.5034E-07 1.5653E-07 S13 -1.5093E-02 -1.0510E-02 3.0338E-03 -3.3716E-04 5.1010E-06 -2.4278E-06 1.2901E-06 -1.5003E-07 5.4022E-09 S14 2.1077E-02 -2.8593E-02 1.0441E-02 -2.3286E-03 3.4552E-04 -3.4126E-05 2.1531E-06 -7.8347E-08 1.2477E-09 S15 -2.5106E-02 1.3772E-02 -3.3502E-03 4.9026E-04 -4.5049E-05 2.6346E-06 -9.5613E-08 1.9692E-09 -1.7621E-11 S16 -2.8053E-02 8.3843E-03 -1.5806E-03 1.8348E-04 -1.3372E-05 5.7713E-07 -1.2261E-08 4.2676E-11 1.7088E-12

[0099] Table 6

[0100] 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 values ​​corresponding to different image heights. 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.

[0101] Example 4

[0102] The following reference Figures 7 to 8D An optical imaging lens according to Example 4 of the present application is described. Figure 7A schematic structural diagram of an optical imaging lens according to Example 4 of the present application is shown.

[0103] like Figure 7 As shown, the optical imaging lens includes, from the object side to the image side along the optical axis, an aperture STO, a first lens E1, a second lens E2, a third lens E3, a fourth lens E4, a fifth lens E5, a sixth lens E6, a seventh lens E7, an eighth lens E8, a filter E9 and an imaging surface S19.

[0104] 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 negative focal power, with its object-side surface S3 being concave and its image-side surface S4 being concave. The third lens E3 has positive focal power, with its object-side surface S5 being convex 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 convex. 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 negative focal power, with its object-side surface S15 being concave 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.

[0105] In this embodiment, the total effective focal length of the optical imaging lens is f = 5.98 mm, the distance TTL on the optical axis from the object-side surface S1 of the first lens element E1 to the imaging surface S19 is 6.70 mm, half the diagonal length of the effective pixel area on the imaging surface S19 is ImgH = 5.85 mm, the maximum half field of view Semi-FOV of the optical imaging lens is 42.7°, and the aperture number Fno of the optical imaging lens is 2.37.

[0106] Table 7 shows the basic parameters of the optical imaging lens of Example 4, where the units of curvature radius, thickness / distance, and focal length are all millimeters (mm).

[0107]

[0108]

[0109] Table 7

[0110] In Example 4, the object side surface and the image side surface of any lens from the first lens E1 to the eighth lens E8 are all aspherical surfaces. Table 8 below lists the high-order coefficients A4, A6, A8, A 10 、A 12、A 14 、A 16 、A 18 and A 20 .

[0111] Face number A4 A6 A8 A10 A12 A14 A16 A18 A20 S1 9.5454E-04 -2.7083E-03 1.5737E-02 -5.1394E-02 9.1839E-02 -9.8557E-02 6.2219E-02 -2.1427E-02 3.0865E-03 S2 -5.9860E-03 -1.0977E-02 4.1837E-02 -1.0202E-01 1.6178E-01 -1.6494E-01 1.0389E-01 -3.7233E-02 5.8825E-03 S3 -9.1810E-04 -1.3916E-02 5.6501E-02 -1.2736E-01 2.0140E-01 -2.1133E-01 1.3779E-01 -5.0564E-02 8.0562E-03 S4 -1.7169E-03 -4.0210E-02 7.9830E-02 -1.6191E-01 2.9734E-01 -3.7307E-01 2.8153E-01 -1.1588E-01 1.9947E-02 S5 -2.0041E-02 -4.5369E-02 9.2719E-02 -1.5982E-01 3.1347E-01 -4.1276E-01 3.1893E-01 -1.3335E-01 2.3150E-02 S6 -1.4729E-03 -2.5335E-02 7.9579E-02 -1.7346E-01 3.4837E-01 -4.2623E-01 2.9905E-01 -1.1003E-01 1.6260E-02 S7 -9.5385E-04 8.5477E-03 -1.7031E-01 5.0916E-01 -9.3323E-01 1.0809E+00 -7.6920E-01 3.0598E-01 -5.1799E-02 S8 -1.4296E-02 8.0260E-02 -2.8982E-01 5.4642E-01 -6.6987E-01 5.4125E-01 -2.7634E-01 8.0137E-02 -1.0051E-02 S9 -6.8581E-02 9.8992E-02 -2.2631E-01 3.5048E-01 -3.5760E-01 2.5281E-01 -1.1681E-01 3.0931E-02 -3.5362E-03 S10 -6.2766E-02 5.3623E-02 -8.8194E-02 1.0781E-01 -8.6579E-02 4.7523E-02 -1.6284E-02 3.0364E-03 -2.3316E-04 S11 -5.4672E-02 3.3591E-02 -2.4466E-02 2.2353E-03 5.6790E-03 -4.0365E-03 1.2801E-03 -1.8676E-04 9.3944E-06 S12 -7.6196E-02 5.3963E-02 -2.9902E-02 9.9497E-03 -1.9232E-03 1.1025E-04 4.0400E-05 -9.2607E-06 5.9736E-07 S13 -1.4884E-02 -1.1834E-02 3.3641E-03 -2.3279E-04 -6.4330E-05 1.2173E-05 -1.7713E-07 -8.0316E-08 4.2060E-09 S14 2.0834E-02 -3.1898E-02 1.2163E-02 -2.7730E-03 4.1496E-04 -4.0977E-05 2.5741E-06 -9.3242E-08 1.4822E-09 S15 -2.2877E-02 1.2194E-02 -2.8813E-03 4.1530E-04 -3.7769E-05 2.1867E-06 -7.8381E-08 1.5878E-09 -1.3887E-11 S16 -2.5805E-02 7.5927E-03 -1.3974E-03 1.5543E-04 -1.0533E-05 3.9402E-07 -5.2281E-09 -1.0078E-10 2.8777E-12

[0112] Table 8

[0113] 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 values ​​corresponding to different image heights. 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.

[0114] Example 5

[0115] The following reference Figures 9 to 10D The optical imaging lens according to Example 5 of the present application is described. Figure 9 A schematic structural diagram of an optical imaging lens according to Example 5 of the present application is shown.

[0116] like Figure 9 As shown, the optical imaging lens includes, from the object side to the image side along the optical axis, an aperture STO, a first lens E1, a second lens E2, a third lens E3, a fourth lens E4, a fifth lens E5, a sixth lens E6, a seventh lens E7, an eighth lens E8, a filter E9 and an imaging surface S19.

[0117] 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 negative focal power, with its object-side surface S3 being convex and its image-side surface S4 being concave. The third lens E3 has positive focal power, with its object-side surface S5 being convex 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 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 convex. The eighth lens E8 has negative focal power, with its object-side surface S15 being concave 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.

[0118] In this embodiment, the total effective focal length of the optical imaging lens is f = 6.00 mm, the distance TTL on the optical axis from the object-side surface S1 of the first lens element E1 to the imaging surface S19 is 6.70 mm, half the diagonal length of the effective pixel area on the imaging surface S19 is ImgH = 5.85 mm, the maximum half field of view Semi-FOV of the optical imaging lens is 42.6°, and the aperture number Fno of the optical imaging lens is 2.37.

[0119] Table 9 shows the basic parameters of the optical imaging lens of Example 5, where the units of curvature radius, thickness / distance, and focal length are all millimeters (mm).

[0120]

[0121] Table 9

[0122] In Example 5, the object side surface and the image side surface of any lens from the first lens E1 to the eighth lens E8 are all aspherical surfaces. Table 10 below lists the high-order coefficients A4, A6, A8, A 10 、A 12 、A 14 、A 16 、A 18 and A 20 .

[0123]

[0124]

[0125] Table 10

[0126] Figure 10AThe 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 values ​​corresponding to different image heights. 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.

[0127] Example 6

[0128] The following reference Figures 11 to 12D The 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.

[0129] like Figure 11 As shown, the optical imaging lens includes, from the object side to the image side along the optical axis, an aperture STO, a first lens E1, a second lens E2, a third lens E3, a fourth lens E4, a fifth lens E5, a sixth lens E6, a seventh lens E7, an eighth lens E8, a filter E9 and an imaging surface S19.

[0130] 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 negative focal power, with its object-side surface S3 being convex and its image-side surface S4 being concave. The third lens E3 has negative focal power, with its object-side surface S5 being convex 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 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 negative focal power, with its object-side surface S15 being concave 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.

[0131] In this embodiment, the total effective focal length of the optical imaging lens is f = 6.02 mm, the distance TTL on the optical axis from the object-side surface S1 of the first lens element E1 to the imaging surface S19 is 6.70 mm, half the diagonal length of the effective pixel area on the imaging surface S19 is ImgH = 5.85 mm, the maximum half field of view Semi-FOV of the optical imaging lens is 42.5°, and the aperture number Fno of the optical imaging lens is 2.38.

[0132] Table 11 shows the basic parameters of the optical imaging lens of Example 6, where the units of curvature radius, thickness / distance, and focal length are all millimeters (mm).

[0133]

[0134]

[0135] Table 11

[0136] In Example 6, the object side surface and the image side surface of any lens from the first lens E1 to the eighth lens E8 are all aspherical surfaces. Table 12 below lists the high-order coefficients A4, A6, A8, A 10 、A 12 、A 14 、A 16 、A 18 and A 20 .

[0137] Face number A4 A6 A8 A10 A12 A14 A16 A18 A20 S1 9.6694E-04 -5.6334E-03 2.2932E-02 -5.9391E-02 9.1857E-02 -8.9237E-02 5.2613E-02 -1.7241E-02 2.3928E-03 S2 -7.9907E-03 -9.2431E-04 -9.7551E-03 4.5710E-02 -9.0757E-02 1.0330E-01 -6.9048E-02 2.4744E-02 -3.6154E-03 S3 -1.2194E-02 -4.4875E-03 2.7146E-03 2.7227E-02 -6.3244E-02 7.3706E-02 -5.1365E-02 1.9829E-02 -3.1843E-03 S4 2.2999E-02 -7.9150E-02 1.1490E-01 -1.7080E-01 2.5771E-01 -2.8512E-01 1.9060E-01 -6.8484E-02 1.0125E-02 S5 -2.3875E-02 -2.5438E-02 5.1990E-02 -4.9368E-02 9.9985E-02 -1.4493E-01 1.0772E-01 -3.9369E-02 5.5174E-03 S6 -3.8977E-03 -1.1983E-02 2.7282E-02 -5.8720E-03 2.6648E-02 -5.4718E-02 4.1036E-02 -1.1291E-02 4.1168E-04 S7 9.9390E-03 -9.3639E-03 -9.3166E-02 2.6610E-01 -4.5909E-01 5.1041E-01 -3.5600E-01 1.4033E-01 -2.3582E-02 S8 -3.3336E-02 1.2128E-01 -3.4927E-01 6.1062E-01 -7.2740E-01 5.7477E-01 -2.8858E-01 8.3004E-02 -1.0419E-02 S9 -8.1069E-02 1.5185E-01 -3.2943E-01 5.0957E-01 -5.3507E-01 3.7652E-01 -1.6862E-01 4.3101E-02 -4.7922E-03 S10 -7.4430E-02 8.0735E-02 -1.3086E-01 1.5796E-01 -1.2872E-01 7.0108E-02 -2.3566E-02 4.3244E-03 -3.2907E-04 S11 -8.7352E-02 6.9253E-02 -5.3635E-02 2.4007E-02 -6.4144E-03 4.3503E-04 2.2656E-04 -4.4025E-05 1.1069E-06 S12 -8.8094E-02 6.5439E-02 -3.9361E-02 1.6941E-02 -5.4480E-03 1.2312E-03 -1.7640E-04 1.4039E-05 -4.6732E-07 S13 -1.5662E-02 -8.9905E-03 2.2351E-03 -1.0557E-04 -3.5989E-05 2.3691E-06 8.8757E-07 -1.2664E-07 4.7364E-09 S14 2.4948E-02 -2.7015E-02 9.0288E-03 -1.9092E-03 2.7534E-04 -2.6972E-05 1.7193E-06 -6.4311E-08 1.0695E-09 S15 -2.5414E-02 1.4221E-02 -3.5634E-03 5.4033E-04 -5.1770E-05 3.1711E-06 -1.2090E-07 2.6220E-09 -2.4769E-11 S16 -2.8398E-02 8.3955E-03 -1.4795E-03 1.5975E-04 -1.1055E-05 4.7975E-07 -1.2049E-08 1.4785E-10 -5.4377E-13

[0138] Table 12

[0139] 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 values ​​corresponding to different image heights. 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.

[0140] In summary, Examples 1 to 6 respectively satisfy the relationships shown in Table 13.

[0141]

[0142]

[0143] Table 13

[0144] 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, characterized in that: Along the optical axis from the object side to the image side, they include: The first lens has positive refractive power, its object-side surface is convex and its image-side surface is concave; a second lens element having negative optical power and a concave image-side surface; a third lens having optical power, the object-side surface of which is convex and the image-side surface of which is concave; a fourth lens having optical power; a fifth lens having optical power; a sixth lens having negative optical power; a seventh lens element having positive optical power and a convex object-side surface; and an eighth lens element having negative optical power, whose object-side surface and image-side surface are concave; The positive and negative properties of the optical power of the third lens are the same as those of the fourth lens, and the positive and negative properties of the optical power of the fifth lens are opposite; The number of lenses having optical power in the optical imaging lens is eight; Wherein, half of the diagonal length ImgH of the effective pixel area on the imaging surface of the optical imaging lens satisfies: 5.80 mm < ImgH < 5.90 mm; and The center thickness CT5 of the fifth lens on the optical axis and the center thickness CT7 of the seventh lens on the optical axis satisfy the following conditions: 3.50≤(CT5+CT7) / (CT7-CT5)≤6.93; The curvature radius R2 of the image-side surface of the first lens and the total effective focal length f of the optical imaging lens satisfy the following conditions: 1.60<R2 / f<3.10; The effective focal length f7 of the seventh lens and the total effective focal length f of the optical imaging lens satisfy the following: 1.16≤f7 / f≤1.

51.

2. The optical imaging lens according to claim 1, wherein: A curvature radius R13 of the object-side surface of the seventh lens and a curvature radius R16 of the image-side surface of the eighth lens satisfy: 0.99≤R16 / R13≤1.

92.

3. The optical imaging lens according to claim 1, wherein: A center thickness CT4 of the fourth lens on the optical axis and a distance T45 between the fourth lens and the fifth lens on the optical axis satisfy the following: 2.49≤CT4 / T45<4.

60.

4. The optical imaging lens according to claim 1, wherein: A curvature radius R2 of the image-side surface of the first lens and a curvature radius R4 of the image-side surface of the second lens satisfy: 2.47≤(R4+R2) / (R2-R4)≤4.

82.

5. The optical imaging lens according to claim 1, wherein: The on-axis distance SAG61 from the intersection of the object side surface of the sixth lens and the optical axis to the effective radius vertex of the object side surface of the sixth lens and the on-axis distance SAG62 from the intersection of the image side surface of the sixth lens and the optical axis to the effective radius vertex of the image side surface of the sixth lens satisfy: 9.40<(SAG62+SAG61) / (SAG62-SAG61)<19.

70.

6. The optical imaging lens according to claim 1, wherein: The maximum effective radius DT82 of the image-side surface of the eighth lens and half the diagonal length ImgH of the effective pixel area on the imaging surface of the optical imaging lens satisfy the following: 0.74<DT82 / ImgH<0.

80.

7. The optical imaging lens according to any one of claims 1 to 6, wherein: The sum of the distances ΣAT between any two adjacent lenses from the first lens to the eighth lens on the optical axis and the distance TD from the object side surface of the first lens to the image side surface of the eighth lens on the optical axis satisfy the following: 0.35<ΣAT / TD<0.

40.

8. The optical imaging lens according to any one of claims 1 to 6, wherein: The optical imaging lens further includes a stop disposed between the object side and the first lens.

Images