Optical imaging lens

Abstract

This application discloses an optical imaging lens, which includes, in sequence along the optical axis from the object side to the image side: an aperture stop, 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 third lens has positive optical power, with both its object side and image side being convex; the fourth lens has negative optical power; the sixth lens has negative optical power, with both its object side and image side being concave; half the diagonal length ImgH of the effective pixel area on the imaging surface of the optical imaging lens satisfies: ImgH > 6.0 mm; and the total effective focal length f of the optical imaging lens and the entrance pupil diameter EPD of the optical imaging lens satisfy: f / EPD < 1.4.

Description

Technical Field

[0001] This application relates to the field of optical components, and more specifically, to an optical imaging lens. Background Technology

[0002] In recent years, with the rapid development of the portable electronic product industry, such as smartphones, cameras used in these products have faced increasingly stringent miniaturization requirements. To meet these miniaturization demands, optical imaging lenses typically have an f-number of 1.8 or higher. Imaging systems with f-numbers below 1.8 sometimes struggle to meet system requirements, resulting in deteriorated performance and increased aberrations. Achieving high image quality and low aberrations under conditions of large aperture and large image plane has become a significant bottleneck. Therefore, it is evident that in the future of optical imaging lenses, lenses with high image quality, large aperture, and large image plane will become the main development trend. Summary of the Invention

[0003] This application provides an optical imaging lens comprising, along the optical axis from the object side to the image side, the following elements in sequence: an aperture stop, 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; wherein the third lens has positive optical power, with both its object-side and image-side surfaces being convex; the fourth lens has negative optical power; the sixth lens has negative optical power, with both its object-side and image-side surfaces being concave; half the diagonal length ImgH of the effective pixel area on the imaging surface of the optical imaging lens satisfies: ImgH > 6.0 mm; and the total effective focal length f and the entrance pupil diameter EPD of the optical imaging lens satisfy: f / EPD < 1.4.

[0004] In one implementation, half of the maximum field of view (Semi-FOV) of the optical imaging lens can satisfy: Semi-FOV > 35°.

[0005] In one embodiment, the effective focal length f2 of the second lens and the effective focal length f4 of the fourth lens can satisfy: 3.5 < f4 / f2 < 6.0.

[0006] In one embodiment, the radius of curvature R1 of the object side of the first lens and the radius of curvature R2 of the image side of the first lens can satisfy: 5.0 < R2 / R1 < 7.0.

[0007] In one embodiment, the radius of curvature R3 of the object side of the second lens and the radius of curvature R4 of the image side of the second lens can satisfy: 2.5 < (R3 + R4) / (R3 - R4) < 4.0.

[0008] In one embodiment, the radius of curvature R9 of the object side of the fifth lens and the radius of curvature R10 of the image side of the fifth lens can satisfy: 3.0 < (R9 + R10) / (R9 - R10) < 3.5.

[0009] In one embodiment, the effective focal length f3 of the third lens, the radius of curvature R5 of the object side of the third lens, and the radius of curvature R6 of the image side of the third lens can satisfy: -4.0 < f3 / (R5+R6) < -1.5.

[0010] In one embodiment, the center thickness CT1 of the first lens on the optical axis and the air gap T12 between the first lens and the second lens on the optical axis can satisfy: 5.0 < CT1 / T12 < 6.5.

[0011] In one embodiment, the center thickness CT3 of the third lens on the optical axis and the air gap T34 between the third and fourth lenses on the optical axis can satisfy: 3.5 < CT3 / T34 < 5.0.

[0012] In one embodiment, the center thickness CT2 of the second lens on the optical axis and the center thickness CT8 of the eighth lens on the optical axis can satisfy: 0.5 < CT8 / CT2 < 2.0.

[0013] In one embodiment, the radius of curvature R2 of the image side of the first lens and the total effective focal length f of the optical imaging lens can satisfy: 2.5 < R2 / f < 3.5.

[0014] In one embodiment, the effective focal length f2 of the second lens and the effective focal length f5 of the fifth lens can satisfy: -2.5 < f5 / f2 < -1.5.

[0015] In one embodiment, the effective focal length f7 of the seventh lens and the radius of curvature R13 of the object side surface of the seventh lens can satisfy: 1.5 < f7 / R13 < 2.5.

[0016] In one embodiment, the total effective focal length f of the optical imaging lens and the radius of curvature R16 of the image side surface of the eighth lens can satisfy: 2.0 < f / R16 < 3.0.

[0017] In one embodiment, the radius of curvature R11 of the object side of the sixth lens and the radius of curvature R6 of the image side of the third lens can satisfy: 1.5 < R6 / R11 < 2.5.

[0018] In one embodiment, the radius of curvature R7 of the object side of the fourth lens and the radius of curvature R12 of the image side of the sixth lens can satisfy: -3.0 < R7 / R12 < -1.5.

[0019] This application provides an optical imaging lens that is suitable for portable electronic products and has at least one of the following characteristics: high imaging quality, large image plane, large aperture, and good processing characteristics, by reasonably allocating optical power and optimizing optical parameters. Attached Figure Description

[0020] Other features, objects, and advantages of this application will become more apparent from the following detailed description of non-limiting embodiments with reference to the accompanying drawings:

[0021] Figure 1 A schematic diagram of the structure of an optical imaging lens according to Embodiment 1 of this application is shown;

[0022] Figures 2A to 2D The on-axis chromatic aberration curve, astigmatism curve, distortion curve, and magnification chromatic aberration curve of the optical imaging lens of Example 1 are shown respectively.

[0023] Figure 3 A schematic diagram of the structure of an optical imaging lens according to Embodiment 2 of this application is shown;

[0024] Figures 4A to 4D The on-axis chromatic aberration curve, astigmatism curve, distortion curve, and magnification chromatic aberration curve of the optical imaging lens of Example 2 are shown respectively.

[0025] Figure 5 A schematic diagram of the structure of an optical imaging lens according to Embodiment 3 of this application is shown;

[0026] Figures 6A to 6D The on-axis chromatic aberration curve, astigmatism curve, distortion curve, and magnification chromatic aberration curve of the optical imaging lens of Example 3 are shown respectively.

[0027] Figure 7 A schematic diagram of the structure of an optical imaging lens according to Embodiment 4 of this application is shown;

[0028] Figures 8A to 8D The on-axis chromatic aberration curve, astigmatism curve, distortion curve, and magnification chromatic aberration curve of the optical imaging lens of Example 4 are shown respectively.

[0029] Figure 9 A schematic diagram of the structure of an optical imaging lens according to Embodiment 5 of this application is shown;

[0030] Figures 10A to 10D The on-axis chromatic aberration curve, astigmatism curve, distortion curve, and magnification chromatic aberration curve of the optical imaging lens of Example 5 are shown respectively.

[0031] Figure 11 A schematic diagram of the structure of an optical imaging lens according to Embodiment 6 of this application is shown;

[0032] Figures 12A to 12D The on-axis chromatic aberration curve, astigmatism curve, distortion curve, and magnification chromatic aberration curve of the optical imaging lens of Example 6 are shown respectively.

[0033] Figure 13 A schematic diagram of the structure of an optical imaging lens according to Embodiment 7 of this application is shown;

[0034] Figures 14A to 14D The on-axis chromatic aberration curve, astigmatism curve, distortion curve, and magnification chromatic aberration curve of the optical imaging lens of Example 7 are shown respectively.

[0035] Figure 15 A schematic diagram of the structure of an optical imaging lens according to Embodiment 8 of this application is shown; and

[0036] Figures 16A to 16D The on-axis chromatic aberration curve, astigmatism curve, distortion curve, and magnification chromatic aberration curve of the optical imaging lens of Example 8 are shown respectively. Detailed Implementation

[0037] To better understand this application, various aspects of this application will be described in more detail with reference to the accompanying drawings. It should be understood that these detailed descriptions are merely illustrative of exemplary embodiments of this application and are not intended to limit the scope of this application in any way. Throughout the specification, the same reference numerals refer to the same elements. The expression "and / or" includes any and all combinations of one or more of the associated listed items.

[0038] It should be noted that in this specification, the terms "first," "second," "third," etc., are used only to distinguish one feature from another and do not imply any limitation on the features. Therefore, without departing from the teachings of this application, the first lens discussed below may also be referred to as the second lens or the third lens.

[0039] In the accompanying drawings, the thickness, size, and shape of the lenses have been slightly exaggerated for ease of illustration. Specifically, the shapes of the spherical or aspherical surfaces shown in the drawings are illustrated by way of example. That is, the shapes of the spherical or aspherical surfaces are not limited to those shown in the drawings. The drawings are for illustrative purposes only and are not strictly to scale.

[0040] In this article, the paraxial region refers to the region near the optical axis. If the lens surface is convex and the location of the convexity is not defined, it means that the lens surface is convex at least in the paraxial region; if the lens surface is concave and the location of the concaveness is not defined, it means that the lens surface is concave at least in the paraxial region. The surface of each lens closest to the subject is called the object-side surface of the lens, and the surface of each lens closest to the imaging plane is called the image-side surface of the lens.

[0041] It should also be understood that the terms "comprising," "including," "having," "containing," and / or "comprising," when used in this specification, indicate the presence of the stated features, elements, and / or components, but do not exclude the presence or addition of one or more other features, elements, components, and / or combinations thereof. Furthermore, when expressions such as "at least one of..." appear after a list of listed features, they modify the entire list of features, not individual elements in the list. Additionally, when describing embodiments of this application, the word "may" is used to mean "one or more embodiments of this application." And the term "exemplary" is intended to refer to an example or illustration.

[0042] Unless otherwise specified, all terms used herein (including technical and scientific terms) shall have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains. It should also be understood that terms (e.g., those defined in common dictionaries) shall be interpreted as having the meaning consistent with their meaning in the context of the relevant art and shall not be interpreted in an idealized or overly formalized sense, unless expressly so specified herein.

[0043] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other. This application will now be described in detail with reference to the accompanying drawings and embodiments.

[0044] The features, principles and other aspects of this application are described in detail below.

[0045] An optical imaging lens according to an exemplary embodiment of this application includes, in sequence along the optical axis from the object side to the image side: an aperture stop located between the object side and a first lens; 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. Any two adjacent lenses among the first to eighth lenses may have a spacing distance between them.

[0046] In an exemplary embodiment, the first lens may have positive or negative optical power; the second lens may have negative or negative optical power; the third lens may have positive optical power, with its object-side surface being convex and its image-side surface being convex; the fourth lens may have negative optical power; the fifth lens may have positive or negative optical power; the sixth lens may have negative optical power, with its object-side surface being concave and its image-side surface being convex; the seventh lens may have positive or negative optical power; and the eighth lens may have positive or negative optical power. By rationally allocating the positive and negative optical powers of each lens in the optical imaging lens, the low-order aberrations of the optical imaging lens can be effectively balanced and controlled, tolerance sensitivity can be reduced, the miniaturization of the optical imaging lens can be maintained, and the optical imaging lens can achieve a large image plane imaging effect.

[0047] In an exemplary embodiment, the optical imaging lens according to this application satisfies the following condition: ImgH > 6.0 mm, where ImgH is half the diagonal length of the effective pixel area on the imaging plane of the optical imaging lens. Satisfying ImgH > 6.0 mm is beneficial for achieving characteristics such as miniaturization and a large image area in the optical imaging lens.

[0048] In an exemplary embodiment, the optical imaging lens according to this application satisfies the following condition: f / EPD < 1.4, where f is the total effective focal length of the optical imaging lens and EPD is the entrance pupil diameter of the optical imaging lens. Satisfying f / EPD < 1.4 is beneficial for reducing the F-number of the optical imaging lens, increasing the aperture, increasing the amount of light entering the lens, enhancing the imaging effect in dark environments, and at the same time, reducing aberrations in the edge field of view.

[0049] In an exemplary embodiment, the optical imaging lens according to this application further includes an aperture stop disposed between the object side and the first lens.

[0050] In an exemplary embodiment, the optical imaging lens according to this application can satisfy: Semi-FOV > 35°, wherein the Semi-FOV is half of the maximum field of view of the optical imaging lens. More specifically, the Semi-FOV can further satisfy: Semi-FOV > 39°, which is beneficial for achieving characteristics such as a large image area.

[0051] In an exemplary embodiment, the optical imaging lens according to this application satisfies: 3.5 < f4 / f2 < 6.0, where f2 is the effective focal length of the second lens and f4 is the effective focal length of the fourth lens. More specifically, f2 and f4 can further satisfy: 4.0 < f4 / f2 < 5.8. Satisfying 3.5 < f4 / f2 < 6.0 is beneficial for better reducing aberrations in the optical imaging lens and improving the image quality of the lens.

[0052] In an exemplary embodiment, the optical imaging lens according to this application satisfies: 5.0 < R2 / R1 < 7.0, where R1 is the radius of curvature of the object-side surface of the first lens, and R2 is the radius of curvature of the image-side surface of the first lens. More specifically, R2 and R1 can further satisfy: 5.7 < R2 / R1 < 6.8. Satisfying 5.0 < R2 / R1 < 7.0 is beneficial for reasonably controlling the deflection angle of the edge rays of the optical imaging lens, reducing the sensitivity of the lens, and facilitating the achievement of characteristics such as a large image area and high resolution.

[0053] In an exemplary embodiment, the optical imaging lens according to this application satisfies: 2.5 < (R3 + R4) / (R3 - R4) < 4.0, where 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, R3 and R4 can further satisfy: 2.9 < (R3 + R4) / (R3 - R4) < 3.5. Satisfying 2.5 < (R3 + R4) / (R3 - R4) < 4.0 is beneficial for effectively controlling the refraction angle of the light beam from the optical imaging lens in the second lens, ensuring that the second lens has good processing characteristics.

[0054] In an exemplary embodiment, the optical imaging lens according to this application satisfies: 3.0 < (R9 + R10) / (R9 - R10) < 3.5, where R9 is the radius of curvature of the object-side surface of the fifth lens, and R10 is the radius of curvature of the image-side surface of the fifth lens. More specifically, R9 and R10 further satisfy: 3.2 < (R9 + R10) / (R9 - R10) < 3.5. Satisfying 3.0 < (R9 + R10) / (R9 - R10) < 3.5 is beneficial for effectively controlling the refraction angle of the light beam of the optical imaging lens at the fifth lens, ensuring that the fifth lens has good processing characteristics.

[0055] In an exemplary embodiment, the optical imaging lens according to this application satisfies: -4.0 < f3 / (R5+R6) < -1.5, where R5 is the radius of curvature of the object-side surface of the third lens, R6 is the radius of curvature of the image-side surface of the third lens, and f3 is the effective focal length of the third lens. More specifically, f3, R5, and R6 further satisfy: -3.7 < f3 / (R5+R6) < -1.6. Satisfying -4.0 < f3 / (R5+R6) < -1.5 is beneficial for controlling the surface shape of the third lens and ensuring that the third lens has good processing characteristics.

[0056] In an exemplary embodiment, the optical imaging lens according to this application satisfies: 5.0 < CT1 / T12 < 6.5, where CT1 is the center thickness of the first lens on the optical axis, and T12 is the air gap between the first and second lenses on the optical axis. Satisfying 5.0 < CT1 / T12 < 6.5 helps to balance the field curvature generated by the front lens and the rear lens of the optical imaging lens, giving the optical imaging lens a reasonable field curvature.

[0057] In an exemplary embodiment, the optical imaging lens according to this application satisfies: 3.5 < CT3 / T34 < 5.0, where CT3 is the center thickness of the third lens on the optical axis, and T34 is the air gap between the third and fourth lenses on the optical axis. More specifically, CT3 and T34 can further satisfy: 3.8 < CT3 / T34 < 4.8. Satisfying 3.5 < CT3 / T34 < 5.0 helps to balance the field curvature generated by the front lens and the rear lens of the optical imaging lens, giving the optical imaging lens a reasonable field curvature.

[0058] In an exemplary embodiment, the optical imaging lens according to this application satisfies: 0.5 < CT8 / CT2 < 2.0, where CT2 is the center thickness of the second lens on the optical axis, and CT8 is the center thickness of the eighth lens on the optical axis. More specifically, CT2 and CT8 further satisfy: 0.7 < CT8 / CT2 < 1.6. Satisfying 0.5 < CT8 / CT2 < 2.0 is beneficial for controlling the distortion of the optical imaging lens, keeping the distortion of the optical imaging lens within a certain range.

[0059] In an exemplary embodiment, the optical imaging lens according to this application satisfies: 2.5 < R² / f < 3.5, where f is the total effective focal length of the optical imaging lens and R² is the radius of curvature of the image-side surface of the first lens. More specifically, f and R² can further satisfy: 2.8 < R² / f < 3.2. Satisfying 2.5 < R² / f < 3.5 is beneficial for effectively controlling the astigmatism of the optical imaging lens, thereby improving the imaging quality of the off-axis field of view.

[0060] In an exemplary embodiment, the optical imaging lens according to this application satisfies: -2.5 < f5 / f2 < -1.5, where f2 is the effective focal length of the second lens and f5 is the effective focal length of the fifth lens. More specifically, f2 and f5 can further satisfy: -2.1 < f5 / f2 < -1.7. Satisfying -2.5 < f5 / f2 < -1.5 is beneficial for the rational allocation of the optical power of the imaging lens, so that the positive and negative spherical aberrations of the front and rear lens groups cancel each other out.

[0061] In an exemplary embodiment, the optical imaging lens according to this application satisfies: 1.5 < f7 / R13 < 2.5, where f7 is the effective focal length of the seventh lens and R13 is the radius of curvature of the object-side surface of the seventh lens. More specifically, f7 and R13 further satisfy: 1.7 < f7 / R13 < 2.4. Satisfying 1.5 < f7 / R13 < 2.5 helps control the third-order coma of the optical imaging lens within a reasonable range, thereby balancing the amount of coma generated by the front-end optical lens and ensuring that the optical imaging lens obtains better image quality.

[0062] In an exemplary embodiment, the optical imaging lens according to this application satisfies: 2.0 < f / R16 < 3.0, where f is the total effective focal length of the optical imaging lens and R16 is the radius of curvature of the image-side surface of the eighth lens. More specifically, f and R16 can further satisfy: 2.3 < f / R16 < 2.6. Satisfying 2.0 < f / R16 < 3.0 is beneficial for effectively controlling the astigmatism of the optical imaging lens, thereby improving the imaging quality of the off-axis field of view.

[0063] In an exemplary embodiment, the optical imaging lens according to this application satisfies: 1.5 < R6 / R11 < 2.5, where R11 is the radius of curvature of the object-side surface of the sixth lens, and R6 is the radius of curvature of the image-side surface of the third lens. More specifically, R11 and R6 may further satisfy: 1.5 < R6 / R11 < 2.1. Satisfying 1.5 < R6 / R11 < 2.5 is beneficial for balancing the aberrations of the optical imaging lens and improving the imaging quality of the optical imaging lens.

[0064] In an exemplary embodiment, the optical imaging lens according to this application satisfies: -3.0 < R7 / R12 < -1.5, where R7 is the radius of curvature of the object-side surface of the fourth lens, and R12 is the radius of curvature of the image-side surface of the sixth lens. More specifically, R7 and R12 may further satisfy: -2.0 < R7 / R12 < -1.7. Satisfying -3.0 < R7 / R12 < -1.5 is beneficial for balancing the aberrations of the optical imaging lens, improving the imaging quality of the optical imaging lens, and simultaneously reducing the sensitivity of the fourth and sixth lenses.

[0065] In an exemplary embodiment, the effective focal length f1 of the first lens may be, for example, in the range of 7.00 mm to 7.52 mm; the effective focal length f2 of the second lens may be, for example, in the range of -17.40 mm to -14.66 mm; the effective focal length f3 of the third lens may be, for example, in the range of 16.20 mm to 17.51 ​​mm; the effective focal length f4 of the fourth lens may be, for example, in the range of -86.62 mm to -68.19 mm; the effective focal length f5 of the fifth lens may be, for example, in the range of 29.03 mm to 30.95 mm; the effective focal length f6 of the sixth lens may be, for example, in the range of -10277.37 mm to -2238.53 mm; the effective focal length f7 of the seventh lens may be, for example, in the range of 14.54 mm to 16.45 mm; and the effective focal length f8 of the eighth lens may be, for example, in the range of -5.56 mm to -4.87 mm.

[0066] In an exemplary embodiment, the total effective focal length f of the optical imaging lens can be, for example, in the range of 6.77 mm to 7.34 mm, the total length TTL of the optical imaging lens (i.e., the distance from the object side surface S1 of the first lens E1 to the optical axis of the imaging surface S19 of the optical imaging lens) can be, for example, in the range of 8.94 mm to 9.51 mm, half the diagonal length ImgH of the effective pixel area on the imaging surface S19 of the optical imaging lens can be, for example, in the range of 6.09 mm to 6.56 mm, and half the maximum field of view (Semi-FOV) of the optical imaging lens can be, for example, in the range of 39° to 42°.

[0067] In exemplary embodiments, 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. This application proposes an optical imaging lens with characteristics such as miniaturization, large image plane, large aperture, and high imaging quality. The optical imaging lens according to the above embodiments of this application can employ multiple lenses, such as the eight lenses mentioned above. By rationally allocating the optical power, surface shape, center thickness of each lens, and on-axis spacing between lenses, incident light can be effectively converged, the overall optical length of the imaging lens can be reduced, and the manufacturability of the imaging lens can be improved, making the optical imaging lens more conducive to manufacturing.

[0068] In the embodiments of this application, at least one of the mirror surfaces of each lens is an aspherical mirror surface, that is, at least one mirror surface 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 its curvature changes continuously from the center to the periphery of the lens. Unlike a spherical lens, which has a constant curvature from the center to the periphery, an aspherical lens has better radius of curvature characteristics, and has the advantages of improving distortion aberrations and astigmatism aberrations. By using an aspherical lens, aberrations occurring during imaging can be eliminated as much as possible, thereby improving image quality. Optionally, at least one of the object-side and image-side surfaces of each of the first, second, third, fourth, fifth, sixth, seventh, and eighth lenses is an aspherical mirror surface. Optionally, both the object-side and image-side surfaces of each of the first, second, third, fourth, fifth, sixth, seventh, and eighth lenses are aspherical mirror surfaces.

[0069] However, those skilled in the art will understand that the number of lenses constituting the optical imaging lens can be varied to obtain the various results and advantages described herein without departing from the technical solutions claimed in this application. For example, although eight lenses are described as an example in the embodiments, the optical imaging lens is not limited to including eight lenses. If desired, the optical imaging lens may also include other numbers of lenses.

[0070] The following describes in further detail, with reference to the accompanying drawings, specific embodiments of the optical imaging lens applicable to the above-described embodiments.

[0071] Example 1

[0072] The following is for reference Figures 1 to 2D Describes an optical imaging lens according to Embodiment 1 of this application. Figure 1 A schematic diagram of the structure of an optical imaging lens according to Embodiment 1 of this application is shown.

[0073] like Figure 1 As shown, the optical imaging lens includes, from the object side to the image side, an aperture stop STO, a first lens E1, a second lens E2, a third lens E3, a fourth lens E4, a fifth lens E5, a sixth lens E6, a seventh lens E7, an eighth lens E8, a filter E9, and an imaging surface S19.

[0074] The first lens E1 has positive optical power, with its object-side surface S1 being convex and its image-side surface S2 being concave. The second lens E2 has negative optical power, with its object-side surface S3 being convex and its image-side surface S4 being concave. The third lens E3 has positive optical power, with its object-side surface S5 being convex and its image-side surface S6 being convex. The fourth lens E4 has negative optical power, with its object-side surface S7 being convex and its image-side surface S8 being concave. The fifth lens E5 has positive 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 convex. 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 sequentially through each surface S1 to S18 and is finally imaged onto the imaging surface S19.

[0075] Table 1 shows the basic parameters of the optical imaging lens of Example 1, where the units for radius of curvature, thickness / distance, and focal length are all millimeters (mm).

[0076]

[0077] Table 1

[0078] In this example, the total effective focal length f of the optical imaging lens is 6.78 mm, the total length TTL of the optical imaging lens (i.e., the distance on the optical axis from the object side S1 of the first lens E1 to the imaging surface S19 of the optical imaging lens) is 8.95 mm, half the diagonal length ImgH of the effective pixel area on the imaging surface S19 of the optical imaging lens is 6.15 mm, and half the maximum field of view Semi-FOV of the optical imaging lens is 41.0°.

[0079] In Embodiment 1, the object-side surface and image-side surface of any one of the first lens E1 to the eighth lens E8 are aspherical surfaces, and the surface shape x of each aspherical lens can be defined using, but is not limited to, the following aspherical formula:

[0080]

[0081] Where x is the distance vector from the vertex of the aspherical surface at a height of h along the optical axis; c is the paraxial curvature of the aspherical surface, c = 1 / R (i.e., the paraxial curvature c is the reciprocal of the radius of curvature R in Table 1 above); k is the conic coefficient; Ai is the i-th order correction coefficient of the aspherical surface. Table 2 below gives the higher-order coefficients A4, A6, A8, A16, A26, A36 that can be used for each aspherical mirror S1-S16 in Example 1. 10 A 12 A 14 A 16 A 18 and A 20 .

[0082]

[0083]

[0084] Table 2

[0085] Figure 2A The on-axis chromatic aberration curve of the optical imaging lens of Embodiment 1 is shown, which represents the deviation of the focal point of light of different wavelengths after passing through the lens. Figure 2B The astigmatism curve of the optical imaging lens of Embodiment 1 is shown, which represents the meridional image plane curvature and the sagittal image plane curvature. Figure 2C The distortion curve of the optical imaging lens of Example 1 is shown, which represents the distortion magnitude value corresponding to different image heights. Figure 2D The magnification chromatic aberration curve of the optical imaging lens of Embodiment 1 is shown, which represents the deviation of different image heights on the imaging plane after light passes through the lens. According to Figures 2A to 2D It can be seen that the optical imaging lens given in Example 1 can achieve good imaging quality.

[0086] Example 2

[0087] The following is for reference Figures 3 to 4D This paper describes an optical imaging lens according to Embodiment 2 of this application. For the sake of brevity, descriptions similar to those in Embodiment 1 will be omitted in this embodiment and the following embodiments. Figure 3 A schematic diagram of the structure of an optical imaging lens according to Embodiment 2 of this application is shown.

[0088] like Figure 3As shown, the optical imaging lens includes, from the object side to the image side, an aperture stop STO, a first lens E1, a second lens E2, a third lens E3, a fourth lens E4, a fifth lens E5, a sixth lens E6, a seventh lens E7, an eighth lens E8, a filter E9, and an imaging surface S19.

[0089] The first lens E1 has positive optical power, with its object-side surface S1 being convex and its image-side surface S2 being concave. The second lens E2 has negative optical power, with its object-side surface S3 being convex and its image-side surface S4 being concave. The third lens E3 has positive optical power, with its object-side surface S5 being convex and its image-side surface S6 being convex. The fourth lens E4 has negative optical power, with its object-side surface S7 being convex and its image-side surface S8 being concave. The fifth lens E5 has positive 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 convex. 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 sequentially through each surface S1 to S18 and is finally imaged onto the imaging surface S19.

[0090] In this example, the total effective focal length f of the optical imaging lens is 7.20 mm, the total length TTL of the optical imaging lens is 9.41 mm, half the diagonal length ImgH of the effective pixel area on the imaging plane S19 of the optical imaging lens is 6.42 mm, and half the maximum field of view Semi-FOV of the optical imaging lens is 40.6°.

[0091] Table 3 shows the basic parameters of the optical imaging lens of Example 2, wherein the units of radius of curvature, thickness / distance and focal length are millimeters (mm). Table 4 shows the higher-order coefficients that can be used for each aspherical mirror in Example 2, wherein each aspherical surface shape can be defined by formula (1) given in Example 1 above.

[0092]

[0093] Table 3

[0094]

[0095]

[0096] Table 4

[0097] Figure 4A The on-axis chromatic aberration curve of the optical imaging lens of Embodiment 2 is shown, which represents the deviation of the focal point of light of different wavelengths after passing through the lens. Figure 4BThe astigmatism curve of the optical imaging lens of Embodiment 2 is shown, which represents the meridional image plane curvature and the sagittal image plane curvature. Figure 4C The distortion curve of the optical imaging lens of Example 2 is shown, which represents the distortion magnitude value corresponding to different image heights. Figure 4D The magnification chromatic aberration curve of the optical imaging lens of Embodiment 2 is shown, which represents the deviation of different image heights on the imaging plane after light passes through the lens. According to Figures 4A to 4D It can be seen that the optical imaging lens given in Example 2 can achieve good imaging quality.

[0098] Example 3

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

[0100] like Figure 5 As shown, the optical imaging lens includes, from the object side to the image side, an aperture stop STO, a first lens E1, a second lens E2, a third lens E3, a fourth lens E4, a fifth lens E5, a sixth lens E6, a seventh lens E7, an eighth lens E8, a filter E9, and an imaging surface S19.

[0101] The first lens E1 has positive optical power, with its object-side surface S1 being convex and its image-side surface S2 being concave. The second lens E2 has negative optical power, with its object-side surface S3 being convex and its image-side surface S4 being concave. The third lens E3 has positive optical power, with its object-side surface S5 being convex and its image-side surface S6 being convex. The fourth lens E4 has negative optical power, with its object-side surface S7 being convex and its image-side surface S8 being concave. The fifth lens E5 has positive 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 convex. The seventh lens E7 has positive optical power, with its object-side surface S13 being convex and its image-side surface S14 being convex. 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 sequentially through each surface S1 to S18 and is finally imaged onto the imaging surface S19.

[0102] In this example, the total effective focal length f of the optical imaging lens is 6.92 mm, the total length TTL of the optical imaging lens is 9.05 mm, half the diagonal length ImgH of the effective pixel area on the imaging plane S19 of the optical imaging lens is 6.16 mm, and half the maximum field of view Semi-FOV of the optical imaging lens is 40.6°.

[0103] Table 5 shows the basic parameters of the optical imaging lens of Example 3, where the units for radius of curvature, thickness / distance, and focal length are millimeters (mm). Table 6 shows the higher-order coefficients that can be used for each aspherical mirror in Example 3, where each aspherical surface shape can be defined by formula (1) given in Example 1 above.

[0104]

[0105]

[0106] Table 5

[0107] Face number A4 A6 A8 A10 A12 A14 A16 A18 A20 S1 -2.5322E-02 -4.6385E-03 -3.6511E-03 -2.4205E-03 -1.2419E-03 -5.6227E-04 -2.4515E-04 -1.0116E-04 -3.3417E-05 S2 -2.6774E-02 1.2502E-02 -1.3627E-03 1.4472E-03 2.5843E-04 1.1256E-04 1.0208E-05 2.7602E-06 -3.0851E-07 S3 -2.9411E-01 5.9946E-02 -2.9882E-03 1.5522E-03 -3.9278E-04 -2.3404E-04 -8.5287E-05 -5.6561E-05 -2.1582E-05 S4 -3.1090E-01 3.3147E-02 8.9324E-04 -2.2301E-03 -1.9608E-03 -8.4016E-04 -2.8145E-04 -9.7871E-05 -2.2322E-05 S5 -1.9753E-01 -2.5297E-02 4.4881E-03 -2.6476E-03 -1.1324E-03 -4.4715E-05 -1.4195E-05 -5.6625E-05 -2.9852E-05 S6 -2.0657E-01 -7.3400E-03 8.4968E-04 1.9232E-04 2.7000E-04 2.8495E-04 4.0225E-05 -1.4555E-05 2.5907E-05 S7 -4.2683E-01 3.8605E-02 1.6363E-03 -1.1980E-03 -9.5643E-04 -4.0159E-04 -1.6641E-04 -5.6317E-05 -1.5779E-06 S8 -3.4066E-01 4.9100E-02 1.0563E-02 1.8631E-03 -1.3539E-04 -3.2386E-04 -1.4289E-04 -6.0280E-05 -7.7845E-06 S9 -2.8131E-01 -3.4592E-02 7.3872E-03 2.8312E-03 6.8473E-04 -2.4184E-04 1.1593E-04 3.5476E-05 4.2911E-05 S10 -2.2364E-01 -8.3762E-02 3.1278E-02 -1.0304E-02 4.5781E-03 -2.4781E-03 1.3234E-03 -1.5555E-04 1.8856E-04 S11 -2.5028E-01 -2.1195E-01 9.1405E-03 -3.3113E-02 2.4541E-03 -4.7866E-03 1.9856E-03 -1.4510E-04 3.4935E-04 S12 -6.2708E-01 -1.8900E-01 1.9287E-02 -2.9794E-02 7.2372E-03 -4.4848E-03 2.3267E-03 -1.6730E-04 3.4324E-04 S13 -1.4185E+00 -2.8368E-01 3.9244E-02 -1.7739E-02 1.1444E-02 -5.3951E-04 3.2097E-03 4.4753E-04 7.1533E-04 S14 -1.5635E+00 1.0872E-02 1.8425E-01 -1.8554E-02 -2.2159E-02 -5.6182E-03 7.1731E-04 8.1688E-04 2.8136E-04 S15 -3.0027E+00 1.0510E+00 -2.0312E-01 -8.1501E-03 -4.5570E-02 2.4307E-02 -4.8852E-03 -8.7056E-04 -1.9191E-04 S16 -2.7106E+00 1.4790E-01 -2.8227E-01 1.1383E-01 -2.1817E-02 1.1573E-02 -1.9685E-02 -2.1390E-03 -4.5468E-03

[0108] Table 6

[0109] Figure 6A The on-axis chromatic aberration curve of the optical imaging lens of Embodiment 3 is shown, which represents the deviation of the focal point of light of different wavelengths after passing through the lens. Figure 6B The astigmatism curve of the optical imaging lens of Embodiment 3 is shown, which represents the meridional image plane curvature and the sagittal image plane curvature. Figure 6C The distortion curve of the optical imaging lens of Example 3 is shown, which represents the distortion magnitude value corresponding to different image heights. Figure 6D The magnification chromatic aberration curve of the optical imaging lens of Embodiment 3 is shown, which represents the deviation of different image heights on the imaging plane after light passes through the lens. According to Figures 6A to 6D It can be seen that the optical imaging lens given in Example 3 can achieve good imaging quality.

[0110] Example 4

[0111] The following is for reference Figures 7 to 8D An optical imaging lens according to Embodiment 4 of this application is described. Figure 7 A schematic diagram of the structure of an optical imaging lens according to Embodiment 4 of this application is shown.

[0112] like Figure 7 As shown, the optical imaging lens includes, from the object side to the image side, an aperture stop STO, a first lens E1, a second lens E2, a third lens E3, a fourth lens E4, a fifth lens E5, a sixth lens E6, a seventh lens E7, an eighth lens E8, a filter E9, and an imaging surface S19.

[0113] The first lens E1 has positive optical power, with its object-side surface S1 being convex and its image-side surface S2 being concave. The second lens E2 has negative optical power, with its object-side surface S3 being convex and its image-side surface S4 being concave. The third lens E3 has positive optical power, with its object-side surface S5 being convex and its image-side surface S6 being convex. The fourth lens E4 has negative optical power, with its object-side surface S7 being convex and its image-side surface S8 being concave. The fifth lens E5 has positive 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 convex. The seventh lens E7 has positive optical power, with its object-side surface S13 being convex and its image-side surface S14 being convex. 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 sequentially through each surface S1 to S18 and is finally imaged onto the imaging surface S19.

[0114] In this example, the total effective focal length f of the optical imaging lens is 7.03 mm, the total length TTL of the optical imaging lens is 9.21 mm, half the diagonal length ImgH of the effective pixel area on the imaging plane S19 of the optical imaging lens is 6.28 mm, and half the maximum field of view Semi-FOV of the optical imaging lens is 40.6°.

[0115] Table 7 shows the basic parameters of the optical imaging lens of Example 4, where the units for radius of curvature, thickness / distance, and focal length are millimeters (mm). Table 8 shows the higher-order coefficients that can be used for each aspherical mirror in Example 4, where each aspherical surface shape can be defined by formula (1) given in Example 1 above.

[0116]

[0117] Table 7

[0118] Face number A4 A6 A8 A10 A12 A14 A16 A18 A20 S1 -2.6250E-02 -4.7224E-03 -3.7199E-03 -2.4439E-03 -1.2575E-03 -5.7500E-04 -2.5806E-04 -1.0792E-04 -3.8281E-05 S2 -2.7005E-02 1.2815E-02 -1.3094E-03 1.4746E-03 2.5186E-04 1.1052E-04 2.0798E-05 1.2555E-05 9.9435E-06 S3 -3.0030E-01 6.1085E-02 -3.0916E-03 1.6231E-03 -3.3781E-04 -1.5525E-04 -2.9229E-05 -2.7792E-05 -8.0288E-06 S4 -3.1710E-01 3.3797E-02 9.1346E-04 -2.2921E-03 -1.9792E-03 -8.2074E-04 -2.7524E-04 -1.0622E-04 -2.3690E-05 S5 -2.0127E-01 -2.5688E-02 4.5325E-03 -2.6367E-03 -1.1480E-03 -4.2163E-05 -5.6332E-05 -9.6210E-05 -5.4582E-05 S6 -2.1086E-01 -7.6222E-03 9.0304E-04 2.0503E-04 2.9333E-04 3.0156E-04 1.1111E-05 -4.2430E-05 1.4220E-05 S7 -4.3547E-01 3.9320E-02 1.6053E-03 -1.2192E-03 -9.6387E-04 -3.6941E-04 -1.7953E-04 -5.9107E-05 -7.4173E-06 S8 -3.4738E-01 5.0042E-02 1.0787E-02 1.8722E-03 -1.4234E-04 -3.1872E-04 -1.5068E-04 -6.5138E-05 -7.1061E-06 S9 -2.8680E-01 -3.5290E-02 7.6177E-03 2.9239E-03 6.9753E-04 -2.2695E-04 1.3320E-04 4.6824E-05 4.2102E-05 S10 -2.2843E-01 -8.5575E-02 3.1783E-02 -1.0500E-02 4.6912E-03 -2.4975E-03 1.3884E-03 -1.3785E-04 2.0473E-04 S11 -2.5474E-01 -2.1620E-01 9.2726E-03 -3.3839E-02 2.5078E-03 -4.8817E-03 2.0557E-03 -1.3255E-04 3.7409E-04 S12 -6.3954E-01 -1.9262E-01 1.9881E-02 -3.0416E-02 7.3209E-03 -4.6163E-03 2.3475E-03 -1.7322E-04 3.5326E-04 S13 -1.4499E+00 -2.8894E-01 4.0358E-02 -1.7716E-02 1.1644E-02 -6.1799E-04 3.1660E-03 4.3141E-04 7.1551E-04 S14 -1.5949E+00 1.0703E-02 1.8780E-01 -1.8985E-02 -2.2604E-02 -5.7698E-03 7.0858E-04 8.2665E-04 2.7273E-04 S15 -3.0626E+00 1.0723E+00 -2.0707E-01 -8.3568E-03 -4.6461E-02 2.4846E-02 -5.0729E-03 -9.8810E-04 -1.4506E-04 S16 -2.7642E+00 1.5421E-01 -2.8465E-01 1.1813E-01 -2.1977E-02 1.1505E-02 -2.0228E-02 -2.0775E-03 -4.3631E-03

[0119] Table 8

[0120] Figure 8A The on-axis chromatic aberration curve of the optical imaging lens of Embodiment 4 is shown, which represents the deviation of the focal point of light of different wavelengths after passing through the lens. Figure 8B The astigmatism curve of the optical imaging lens of Embodiment 4 is shown, which represents the meridional image plane curvature and the sagittal image plane curvature. Figure 8C The distortion curve of the optical imaging lens of Example 4 is shown, which represents the distortion magnitude value corresponding to different image heights. Figure 8D The magnification chromatic aberration curve of the optical imaging lens of Embodiment 4 is shown, which represents the deviation of different image heights on the imaging plane after light passes through the lens. According to Figures 8A to 8DIt can be seen that the optical imaging lens given in Example 4 can achieve good imaging quality.

[0121] Example 5

[0122] The following is for reference Figures 9 to 10D An optical imaging lens according to Embodiment 5 of this application is described. Figure 9 A schematic diagram of the structure of an optical imaging lens according to Embodiment 5 of this application is shown.

[0123] like Figure 9 As shown, the optical imaging lens includes, from the object side to the image side, an aperture stop STO, a first lens E1, a second lens E2, a third lens E3, a fourth lens E4, a fifth lens E5, a sixth lens E6, a seventh lens E7, an eighth lens E8, a filter E9, and an imaging surface S19.

[0124] The first lens E1 has positive optical power, with its object-side surface S1 being convex and its image-side surface S2 being concave. The second lens E2 has negative optical power, with its object-side surface S3 being convex and its image-side surface S4 being concave. The third lens E3 has positive optical power, with its object-side surface S5 being convex and its image-side surface S6 being convex. The fourth lens E4 has negative optical power, with its object-side surface S7 being convex and its image-side surface S8 being concave. The fifth lens E5 has positive 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 convex. 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 sequentially through each surface S1 to S18 and is finally imaged onto the imaging surface S19.

[0125] In this example, the total effective focal length f of the optical imaging lens is 7.00 mm, the total length TTL of the optical imaging lens is 9.10 mm, half the diagonal length ImgH of the effective pixel area on the imaging plane S19 of the optical imaging lens is 6.23 mm, and half the maximum field of view Semi-FOV of the optical imaging lens is 40.3°.

[0126] Table 9 shows the basic parameters of the optical imaging lens of Example 5, wherein the units of radius of curvature, thickness / distance and focal length are millimeters (mm). Table 10 shows the higher-order coefficients that can be used for each aspherical mirror in Example 5, wherein each aspherical surface shape can be defined by formula (1) given in Example 1 above.

[0127]

[0128] Table 9

[0129]

[0130]

[0131] Table 10

[0132] Figure 10A The on-axis chromatic aberration curve of the optical imaging lens of Embodiment 5 is shown, which represents the deviation of the focal point of light of different wavelengths after passing through the lens. Figure 10B The astigmatism curve of the optical imaging lens of Embodiment 5 is shown, which represents the meridional image plane curvature and the sagittal image plane curvature. Figure 10C The distortion curve of the optical imaging lens of Example 5 is shown, which represents the distortion magnitude value corresponding to different image heights. Figure 10D The magnification chromatic aberration curve of the optical imaging lens of Embodiment 5 is shown, which represents the deviation of different image heights on the imaging plane after light passes through the lens. According to Figures 10A to 10D It can be seen that the optical imaging lens given in Example 5 can achieve good imaging quality.

[0133] Example 6

[0134] The following is for reference Figures 11 to 12D An optical imaging lens according to Embodiment 6 of this application is described. Figure 11 A schematic diagram of the structure of an optical imaging lens according to Embodiment 6 of this application is shown.

[0135] like Figure 11 As shown, the optical imaging lens includes, from the object side to the image side, an aperture stop STO, a first lens E1, a second lens E2, a third lens E3, a fourth lens E4, a fifth lens E5, a sixth lens E6, a seventh lens E7, an eighth lens E8, a filter E9, and an imaging surface S19.

[0136] The first lens E1 has positive optical power, with its object-side surface S1 being convex and its image-side surface S2 being concave. The second lens E2 has negative optical power, with its object-side surface S3 being convex and its image-side surface S4 being concave. The third lens E3 has positive optical power, with its object-side surface S5 being convex and its image-side surface S6 being convex. The fourth lens E4 has negative optical power, with its object-side surface S7 being convex and its image-side surface S8 being concave. The fifth lens E5 has positive 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 convex. 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 sequentially through each surface S1 to S18 and is finally imaged onto the imaging surface S19.

[0137] In this example, the total effective focal length f of the optical imaging lens is 7.33 mm, the total length TTL of the optical imaging lens is 9.50 mm, half the diagonal length ImgH of the effective pixel area on the imaging plane S19 of the optical imaging lens is 6.55 mm, and half the maximum field of view Semi-FOV of the optical imaging lens is 40.4°.

[0138] Table 11 shows the basic parameters of the optical imaging lens of Example 6, wherein the units of radius of curvature, thickness / distance and focal length are millimeters (mm). Table 12 shows the higher-order coefficients that can be used for each aspherical mirror in Example 6, wherein each aspherical surface shape can be defined by formula (1) given in Example 1 above.

[0139]

[0140]

[0141] Table 11

[0142] Face number A4 A6 A8 A10 A12 A14 A16 A18 A20 S1 -3.5222E-02 -2.8590E-03 -2.1167E-03 -1.6763E-03 -9.3268E-04 -4.0519E-04 -1.7177E-04 -6.0161E-05 -2.3660E-05 S2 -2.8933E-02 1.5967E-02 -2.4356E-03 1.8114E-03 3.6964E-04 2.3601E-04 6.6903E-05 2.2286E-05 4.7548E-06 S3 -3.1012E-01 5.8827E-02 -3.1971E-03 2.7296E-03 9.9576E-06 1.4201E-05 2.4766E-05 -1.1104E-05 -1.1017E-05 S4 -3.5600E-01 3.7090E-02 2.3632E-03 -3.1279E-03 -3.0038E-03 -1.3062E-03 -4.3912E-04 -1.4327E-04 -2.4924E-05 S5 -2.2976E-01 -3.2207E-02 2.3165E-03 -5.1700E-03 -1.8801E-03 3.1595E-05 1.2415E-04 -3.4566E-06 -1.2713E-05 S6 -2.4216E-01 -1.2118E-02 1.7080E-04 3.0424E-04 7.2468E-04 5.0349E-04 1.3041E-04 1.3987E-05 6.1188E-05 S7 -4.8359E-01 4.9631E-02 4.1167E-03 -2.3521E-03 -1.9164E-03 -8.4399E-04 -2.3352E-04 -5.6307E-05 1.3384E-05 S8 -3.8212E-01 5.8973E-02 1.6894E-02 2.0037E-03 -8.8313E-04 -8.9849E-04 -3.6851E-04 -1.4362E-04 -2.1285E-05 S9 -3.2005E-01 -4.4136E-02 1.0266E-02 2.2704E-03 -1.2744E-05 -2.4163E-04 2.9960E-04 1.7261E-04 6.3362E-05 S10 -2.2866E-01 -1.0655E-01 3.7746E-02 -1.3647E-02 2.9375E-03 -1.7176E-03 1.1127E-03 -4.5528E-05 1.1730E-04 S11 -2.8316E-01 -2.5490E-01 1.2787E-02 -3.7957E-02 5.0654E-04 -2.3125E-03 2.2779E-03 1.3056E-04 2.1245E-04 S12 -8.0947E-01 -1.8012E-01 1.6502E-02 -3.1000E-02 8.6156E-03 -7.8150E-04 2.5861E-03 -5.6610E-04 1.2053E-04 S13 -1.6751E+00 -2.0553E-01 5.8945E-02 -1.2950E-02 1.3492E-02 1.5870E-03 2.4567E-03 3.7661E-04 4.7076E-04 S14 -1.9793E+00 1.1469E-01 2.1646E-01 -6.6985E-02 -3.6442E-02 -4.7529E-03 5.2244E-03 2.0460E-03 1.2085E-04 S15 -3.0019E+00 1.1244E+00 -2.0704E-01 6.2768E-03 -4.1875E-02 3.0223E-02 -5.9047E-03 -1.9066E-03 5.9749E-04 S16 -2.8182E+00 4.3735E-01 -2.3158E-01 1.3489E-01 -2.7676E-02 1.5670E-02 -1.5034E-02 2.1339E-03 -2.6508E-03

[0143] Table 12

[0144] Figure 12A The on-axis chromatic aberration curve of the optical imaging lens of Embodiment 6 is shown, which represents the deviation of the focal point of light of different wavelengths after passing through the lens. Figure 12B The astigmatism curve of the optical imaging lens of Embodiment 6 is shown, which represents the meridional image plane curvature and the sagittal image plane curvature. Figure 12C The distortion curve of the optical imaging lens of Example 6 is shown, which represents the distortion magnitude value corresponding to different image heights. Figure 12DThe magnification chromatic aberration curve of the optical imaging lens of Embodiment 6 is shown, which represents the deviation of different image heights on the imaging plane after light passes through the lens. According to Figures 12A to 12D It can be seen that the optical imaging lens given in Example 6 can achieve good imaging quality.

[0145] Example 7

[0146] The following is for reference Figures 13 to 14D An optical imaging lens according to Embodiment 7 of this application is described. Figure 13 A schematic diagram of the structure of an optical imaging lens according to Embodiment 7 of this application is shown.

[0147] like Figure 13 As shown, the optical imaging lens includes, from the object side to the image side, an aperture stop STO, a first lens E1, a second lens E2, a third lens E3, a fourth lens E4, a fifth lens E5, a sixth lens E6, a seventh lens E7, an eighth lens E8, a filter E9, and an imaging surface S19.

[0148] The first lens E1 has positive optical power, with its object-side surface S1 being convex and its image-side surface S2 being concave. The second lens E2 has negative optical power, with its object-side surface S3 being convex and its image-side surface S4 being concave. The third lens E3 has positive optical power, with its object-side surface S5 being convex and its image-side surface S6 being convex. The fourth lens E4 has negative optical power, with its object-side surface S7 being convex and its image-side surface S8 being concave. The fifth lens E5 has positive 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 convex. 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 sequentially through each surface S1 to S18 and is finally imaged onto the imaging surface S19.

[0149] In this example, the total effective focal length f of the optical imaging lens is 7.12 mm, the total length TTL of the optical imaging lens is 9.22 mm, half the diagonal length ImgH of the effective pixel area on the imaging plane S19 of the optical imaging lens is 6.36 mm, and half the maximum field of view Semi-FOV of the optical imaging lens is 40.3°.

[0150] Table 13 shows the basic parameters of the optical imaging lens of Example 7, wherein the units of radius of curvature, thickness / distance and focal length are millimeters (mm). Table 14 shows the higher-order coefficients that can be used for each aspherical mirror in Example 7, wherein each aspherical surface shape can be defined by formula (1) given in Example 1 above.

[0151]

[0152]

[0153] Table 13

[0154] Face number A4 A6 A8 A10 A12 A14 A16 A18 A20 S1 -3.6283E-02 -2.4442E-03 -1.8836E-03 -1.5852E-03 -9.4037E-04 -4.1909E-04 -1.8419E-04 -6.2893E-05 -2.5989E-05 S2 -2.7102E-02 1.5426E-02 -2.6706E-03 1.8617E-03 3.5966E-04 2.8641E-04 8.7829E-05 3.6562E-05 1.0294E-05 S3 -3.0135E-01 5.6235E-02 -2.8848E-03 3.1616E-03 7.2380E-05 1.2629E-04 4.5785E-05 2.5127E-06 -9.9458E-06 S4 -3.4780E-01 3.6211E-02 3.7109E-03 -2.3875E-03 -2.8967E-03 -1.2312E-03 -4.2923E-04 -1.4748E-04 -2.8642E-05 S5 -2.2205E-01 -3.0855E-02 1.7666E-03 -5.2017E-03 -2.1064E-03 -2.6861E-05 1.3592E-04 7.7117E-06 -6.4337E-06 S6 -2.3385E-01 -1.2731E-02 -8.3949E-04 3.8501E-04 5.5728E-04 4.5094E-04 1.0340E-04 -1.1114E-05 5.5094E-05 S7 -4.7013E-01 4.8014E-02 4.3033E-03 -2.2091E-03 -1.9903E-03 -7.9274E-04 -2.3582E-04 -8.3691E-05 -2.6267E-06 S8 -3.6699E-01 5.7836E-02 1.6641E-02 1.5357E-03 -1.2578E-03 -1.0425E-03 -4.5827E-04 -1.9463E-04 -4.2002E-05 S9 -3.0713E-01 -4.2504E-02 9.7645E-03 2.2909E-03 8.6489E-05 -1.1050E-04 3.6719E-04 1.8834E-04 5.5488E-05 S10 -2.1770E-01 -1.0631E-01 3.5751E-02 -1.3449E-02 2.8629E-03 -1.7062E-03 1.0889E-03 -1.9222E-05 9.7823E-05 S11 -2.7257E-01 -2.5129E-01 1.4350E-02 -3.6183E-02 9.6758E-04 -1.8467E-03 2.5246E-03 3.3189E-04 2.1743E-04 S12 -7.8304E-01 -1.5262E-01 2.1849E-02 -3.1213E-02 9.1121E-03 -7.3761E-04 1.8766E-03 -9.9751E-04 -1.9646E-04 S13 -1.6271E+00 -1.4677E-01 7.0011E-02 -1.7237E-02 1.0068E-02 3.5613E-04 1.1617E-03 3.4809E-04 2.2760E-04 S14 -1.8951E+00 9.6209E-02 2.0684E-01 -6.6444E-02 -3.3721E-02 -4.2081E-03 5.4380E-03 2.7943E-03 -2.0793E-04 S15 -2.8587E+00 1.0785E+00 -2.0420E-01 7.0504E-03 -3.8635E-02 2.9340E-02 -5.7613E-03 -1.8598E-03 6.7915E-04 S16 -2.8520E+00 4.7457E-01 -2.0950E-01 1.2899E-01 -2.6618E-02 1.4146E-02 -1.4768E-02 1.5817E-03 -2.1163E-03

[0155] Table 14

[0156] Figure 14A The on-axis chromatic aberration curve of the optical imaging lens of Embodiment 7 is shown, which represents the deviation of the focal point of light of different wavelengths after passing through the lens. Figure 14B The astigmatism curve of the optical imaging lens of Embodiment 7 is shown, which represents the meridional image plane curvature and the sagittal image plane curvature. Figure 14C The distortion curve of the optical imaging lens of Example 4 is shown, which represents the distortion magnitude value corresponding to different image heights. Figure 14D The magnification chromatic aberration curve of the optical imaging lens of Embodiment 4 is shown, which represents the deviation of different image heights on the imaging plane after light passes through the lens. According to Figures 14A to 14D It can be seen that the optical imaging lens given in Example 7 can achieve good imaging quality.

[0157] Example 8

[0158] The following is for reference Figures 15 to 16D An optical imaging lens according to Embodiment 8 of this application is described. Figure 15 A schematic diagram of the structure of an optical imaging lens according to Embodiment 8 of this application is shown.

[0159] like Figure 15 As shown, the optical imaging lens includes, from the object side to the image side, an aperture stop STO, a first lens E1, a second lens E2, a third lens E3, a fourth lens E4, a fifth lens E5, a sixth lens E6, a seventh lens E7, an eighth lens E8, a filter E9, and an imaging surface S19.

[0160] The first lens E1 has positive optical power, with its object-side surface S1 being convex and its image-side surface S2 being concave. The second lens E2 has negative optical power, with its object-side surface S3 being convex and its image-side surface S4 being concave. The third lens E3 has positive optical power, with its object-side surface S5 being convex and its image-side surface S6 being convex. The fourth lens E4 has negative optical power, with its object-side surface S7 being convex and its image-side surface S8 being concave. The fifth lens E5 has positive 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 convex. 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 sequentially through each surface S1 to S18 and is finally imaged onto the imaging surface S19.

[0161] In this example, the total effective focal length f of the optical imaging lens is 7.00 mm, the total length TTL of the optical imaging lens is 9.03 mm, half the diagonal length ImgH of the effective pixel area on the imaging plane S19 of the optical imaging lens is 6.10 mm, and half the maximum field of view Semi-FOV of the optical imaging lens is 39.7°.

[0162] Table 15 shows the basic parameters of the optical imaging lens of Example 8, wherein the units of radius of curvature, thickness / distance and focal length are millimeters (mm). Table 16 shows the higher-order coefficients that can be used for each aspherical mirror in Example 7, wherein each aspherical surface shape can be defined by formula (1) given in Example 1 above.

[0163]

[0164] Table 15

[0165]

[0166]

[0167] Table 16

[0168] Figure 16A The on-axis chromatic aberration curve of the optical imaging lens of Embodiment 8 is shown, which represents the deviation of the focal point of light of different wavelengths after passing through the lens. Figure 16B The astigmatism curve of the optical imaging lens of Embodiment 8 is shown, which represents the meridional image plane curvature and the sagittal image plane curvature. Figure 16C The distortion curve of the optical imaging lens of Example 8 is shown, which represents the distortion magnitude value corresponding to different image heights. Figure 16DThe magnification chromatic aberration curve of the optical imaging lens of Embodiment 8 is shown, which represents the deviation of different image heights on the imaging plane after light passes through the lens. According to Figures 16A to 16D It can be seen that the optical imaging lens given in Example 8 can achieve good imaging quality.

[0169] In summary, Examples 1 to 8 satisfy the relationships shown in Table 17.

[0170] Conditional / Example 1 2 3 4 5 6 7 8 ImgH 6.15 6.42 6.16 6.28 6.23 6.55 6.36 6.10 f / EPD 1.35 1.40 1.40 1.40 1.38 1.38 1.38 1.38 Semi-FOV 41.0 40.6 40.6 40.6 40.3 40.4 40.3 39.7 f4 / f2 4.56 4.21 4.11 4.07 4.82 5.20 5.75 5.63 R2 / R1 5.74 5.92 6.00 6.02 6.31 6.49 6.50 6.72 (R3+R4) / (R3-R4) 3.42 3.34 3.32 3.29 3.10 3.01 2.95 2.91 (R9+R10) / (R9-R10) 3.29 3.32 3.32 3.31 3.33 3.38 3.40 3.43 f3 / (R5+R6) -2.95 -3.46 -3.62 -3.45 -2.40 -2.05 -1.70 -1.78 CT1 / T12 5.15 5.22 5.45 5.49 5.53 5.92 6.02 6.42 CT3 / T34 4.45 3.96 3.89 3.91 4.50 4.56 4.70 4.78 CT8 / CT2 1.56 1.57 1.54 1.53 0.87 0.82 0.75 0.79 R2 / f 2.84 2.87 2.91 2.93 3.04 3.10 3.09 3.19 f5 / f2 -1.71 -1.74 -1.75 -1.74 -1.86 -1.93 -2.00 -2.03 f7 / R13 2.09 2.08 1.76 1.76 2.03 2.16 2.12 2.39 f / R16 2.46 2.51 2.53 2.53 2.46 2.41 2.38 2.32 R6 / R11 1.65 1.63 1.52 1.52 1.78 1.95 2.03 2.00 R7 / R12 -1.76 -1.91 -1.85 -1.86 -1.91 -1.94 -1.88 -1.89

[0171] Table 17

[0172] This application also provides an imaging device, wherein the electronic photosensitive element can be a photocoupled device (CCD) or a complementary metal oxide semiconductor device (CMOS). The imaging device can be a stand-alone imaging device such as a digital camera, or an imaging module integrated into a mobile electronic device such as a mobile phone. The imaging device is equipped with the optical imaging lens described above.

[0173] The above description is merely a preferred embodiment of this application and an explanation of the technical principles employed. Those skilled in the art should understand that the scope of the invention involved in this application is not limited to technical solutions formed by specific combinations of the above-described technical features, but should also cover other technical solutions formed by arbitrary combinations of the above-described technical features or their equivalents without departing from the inventive concept. For example, technical solutions formed by substituting the above features with (but not limited to) technical features with similar functions disclosed in this application.

Claims

1. An optical imaging lens, comprising, in sequence along the optical axis from the object side to the image side: An aperture stop, comprising 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, characterized in that: The first lens has positive optical power, and its object side is convex and its image side is concave. The second lens has negative optical power, with its object side being convex and its image side being concave. The third lens has positive optical power, and its object side is convex, as is its image side; The fourth lens has negative optical power, and its object side is convex while its image side is concave. The fifth lens has positive optical power, with its object side being concave and its image side being convex. The sixth lens has negative optical power, and its object side is concave while its image side is convex. The seventh lens has positive optical power and its object-side surface is convex. The eighth lens has negative optical power and its image-side surface is concave. The diagonal length of half the effective pixel area ImgH on the imaging plane of the optical imaging lens satisfies: 6.56mm ≥ ImgH > 6.0mm; and The total effective focal length f of the optical imaging lens and the entrance pupil diameter EPD of the optical imaging lens satisfy: 1.35≤f / EPD≤1.40; The optical imaging lens has eight lenses with optical power.

2. The optical imaging lens according to claim 1, characterized in that, The maximum field of view (Semi-FOV) of the optical imaging lens must satisfy the following condition: 41.0° ≥ Semi-FOV > 35°.

3. The optical imaging lens according to claim 1, characterized in that, The effective focal length f2 of the second lens and the effective focal length f4 of the fourth lens satisfy the condition: 4.07≤f4 / f2≤5.

75.

4. The optical imaging lens according to claim 1, characterized in that, The radius of curvature R1 of the object side of the first lens and the radius of curvature R2 of the image side of the first lens satisfy: 5.7 < R2 / R1 ≤ 6.

72.

5. The optical imaging lens according to claim 1, characterized in that, The radius of curvature R3 of the object side of the second lens and the radius of curvature R4 of the image side of the second lens satisfy: 2.9 < (R3 + R4) / (R3 - R4) ≤ 3.

42.

6. The optical imaging lens according to claim 1, characterized in that, The radius of curvature R9 of the object side of the fifth lens and the radius of curvature R10 of the image side of the fifth lens satisfy: 3.29≤(R9+R10) / (R9-R10)≤3.

43.

7. The optical imaging lens according to claim 1, characterized in that, The effective focal length f3 of the third lens, the radius of curvature R5 of the object side of the third lens, and the radius of curvature R6 of the image side of the third lens satisfy: -3.62≤f3 / (R5+R6)≤-1.

70.

8. The optical imaging lens according to claim 1, characterized in that, The center thickness CT1 of the first lens on the optical axis and the air gap T12 between the first lens and the second lens on the optical axis satisfy: 5.15≤CT1 / T12≤6.

42.

9. The optical imaging lens according to claim 1, characterized in that, The center thickness CT3 of the third lens on the optical axis and the air gap T34 between the third lens and the fourth lens on the optical axis satisfy the following condition: 3.89 ≤ CT3 / T34 < 4.

8.

10. The optical imaging lens according to claim 1, characterized in that, The center thickness CT2 of the second lens on the optical axis and the center thickness CT8 of the eighth lens on the optical axis satisfy the following condition: 0.75≤CT8 / CT2<1.

6.

11. The optical imaging lens according to claim 1, characterized in that, The radius of curvature R2 of the image side of the first lens and the total effective focal length f of the optical imaging lens satisfy: 2.8 < R2 / f < 3.

2.

12. The optical imaging lens according to claim 1, characterized in that, The effective focal length f2 of the second lens and the effective focal length f5 of the fifth lens satisfy the condition: -2.03 ≤ f5 / f2 < -1.

7.

13. The optical imaging lens according to claim 1, characterized in that, The effective focal length f7 of the seventh lens and the radius of curvature R13 of the object side surface of the seventh lens satisfy the following condition: 1.76 ≤ f7 / R13 < 2.

4.

14. The optical imaging lens according to claim 1, characterized in that, The total effective focal length f of the optical imaging lens and the radius of curvature R16 of the image side surface of the eighth lens satisfy the following condition: 2.3 < f / R16 ≤ 2.

53.

15. The optical imaging lens according to claim 1, characterized in that, The radius of curvature R11 of the object side of the sixth lens and the radius of curvature R6 of the image side of the third lens satisfy the following condition: 1.5 < R6 / R11 ≤ 2.

03.

16. The optical imaging lens according to claim 1, characterized in that, The radius of curvature R7 of the object side of the fourth lens and the radius of curvature R12 of the image side of the sixth lens satisfy the following condition: -1.94≤R7 / R12≤-1.76.

Images