Optical imaging lens

Abstract

The application provides an optical imaging lens, which comprises, in sequence from the object side to the image side along the optical axis, a first lens with positive refractive power, a second lens with negative refractive power, the image side of which is concave, a third lens with refractive power, a fourth lens with negative refractive power, a fifth lens with positive refractive power, the object side of which is convex, the image side of which is convex, a sixth lens with negative refractive power, the object side of which is concave, the image side of which is concave, and the object side and the image side of which are aspherical mirror surfaces. The effective focal length f of the optical imaging lens and the radius of curvature R12 of the image side of the sixth lens satisfy 0.08 ≤ f / R12 < 1; the central thickness CT2 of the second lens on the optical axis and the central thickness CT3 of the third lens on the optical axis satisfy 0.7 < CT2 / CT3 < 1.1; and the number of lenses with refractive power in the optical imaging lens is six.

Description

[0001] Divisional application statement

[0002] This application is a divisional application of Chinese invention patent application filed on July 16, 2019, entitled "Optical Imaging Lens" and with application number 201910642117.2. Technical Field

[0003] This application relates to an optical imaging lens, specifically an optical imaging lens comprising six lenses. Background Technology

[0004] The requirements for imaging capabilities in portable electronic devices are becoming increasingly demanding. Since the optical characteristics of the imaging lens directly affect the initial image quality, higher performance requirements are being placed on the optical imaging lenses used with portable electronic devices. In particular, with the improvement of image sensor performance, the industry is looking for an optical imaging lens with a large aperture, large image plane, and high image quality. Summary of the Invention

[0005] This application provides an optical imaging lens that can at least solve or partially solve at least one of the above-mentioned disadvantages in the prior art, such as a large aperture, large image plane optical imaging lens.

[0006] This application provides an optical imaging lens, which may include, in sequence along the optical axis from the object side to the image side: a first lens having positive optical power; a second lens having negative optical power, the image side of which is concave; a third lens having optical power; a fourth lens having negative optical power; a fifth lens having optical power, the object side of which is convex and the image side of which is convex; and a sixth lens having optical power.

[0007] According to the embodiments of this application, the radius of curvature R11 of the object side of the sixth lens and the radius of curvature R12 of the image side of the sixth lens can satisfy |R11 / R12|<1.

[0008] According to the embodiments of this application, the aperture value Fno of the optical imaging lens and half the diagonal length ImgH of the effective pixel area on the imaging plane of the optical imaging lens can satisfy Fno / ImgH < 0.5mm. -1 .

[0009] According to the embodiments of this application, the effective focal length f of the optical imaging lens and the radius of curvature R12 of the image side surface of the sixth lens can satisfy f / R12<1.

[0010] According to the embodiments of this application, the radius of curvature R1 of the object side surface of the first lens and the radius of curvature R11 of the object side surface of the sixth lens can satisfy -2 < R1 / R11 < -1.

[0011] According to the embodiments of this application, 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 0 < (R9 + R10) / (R9 - R10) < 0.5.

[0012] According to the embodiments of this application, the distance T23 between the second lens and the third lens on the optical axis and the distance T34 between the third lens and the fourth lens on the optical axis can satisfy 1 < T23 / T34 < 2.

[0013] According to the embodiments of this application, the distance T45 between the fourth lens and the fifth lens on the optical axis and the distance T56 between the fifth lens and the sixth lens on the optical axis can satisfy 0.8 < T45 / T56 < 1.3.

[0014] According to the embodiments of this application, the center thickness CT2 of the second lens on the optical axis and the center thickness CT3 of the third lens on the optical axis can satisfy 0.7 < CT2 / CT3 < 1.1.

[0015] According to the embodiments of this application, the center thickness CT3 of the third lens on the optical axis and the center thickness CT4 of the fourth lens on the optical axis can satisfy 0.7 < CT3 / CT4 < 1.1.

[0016] According to the embodiments of this application, the sum of the center thicknesses ΣCT of the first to sixth lenses on the optical axis and the sum of the distances between any two adjacent lenses on the optical axis ΣAT can satisfy 1.4 < ΣCT / ΣAT < 1.8.

[0017] According to the embodiments of this application, the on-axis distance BFL from the image side of the sixth lens to the imaging surface of the optical imaging lens and the on-axis distance TTL from the object side of the first lens to the imaging surface of the optical imaging lens can satisfy 0.15 < BFL / TTL < 0.2.

[0018] According to the embodiments of this application, the edge thickness ET4 of the fourth lens and the center thickness CT4 of the fourth lens on the optical axis can satisfy 0.8 < ET4 / CT4 < 1.

[0019] According to the embodiments of this application, the maximum effective radius DT21 of the object side of the second lens and the maximum effective radius DT32 of the image side of the third lens can satisfy 0.8 < DT21 / DT32 < 1.1.

[0020] According to the embodiments of this application, the maximum effective radius DT52 of the image side of the fifth lens and the maximum effective radius DT61 of the object side of the sixth lens can satisfy 0.8 < DT52 / DT61 ​​< 1.

[0021] According to the embodiments of this application, the axial distance SAG51 from the intersection of the object side surface and the optical axis of the fifth lens to the vertex of the effective radius of the object side surface of the fifth lens and the axial distance SAG61 from the intersection of the object side surface and the optical axis of the sixth lens to the vertex of the effective radius of the object side surface of the sixth lens can satisfy 0.3 < SAG51 / SAG61 < 0.6.

[0022] This application provides an optical imaging lens comprising multiple (e.g., six) lenses. By rationally allocating the optical power, surface shape, center thickness of each lens, and on-axis spacing between each lens, the optical imaging lens achieves the beneficial effects of high pixel count, large aperture, and high definition imaging, and each lens is easy to manufacture. Attached Figure Description

[0023] The above and other advantages of embodiments of this application will become apparent from the following detailed description with reference to the accompanying drawings, which are intended to illustrate exemplary embodiments of this application and not to limit them. In the drawings:

[0024] Figure 1 A schematic structural diagram of an optical imaging lens according to Embodiment 1 of this application is shown;

[0025] Figures 2A to 2D The on-axis chromatic aberration curve, astigmatism curve, distortion curve, and magnification chromatic aberration curve according to Embodiment 1 of this application are shown in sequence.

[0026] Figure 3 A schematic structural diagram of an optical imaging lens according to Embodiment 2 of this application is shown;

[0027] Figures 4A to 4D The on-axis chromatic aberration curve, astigmatism curve, distortion curve, and magnification chromatic aberration curve according to Embodiment 2 of this application are shown in sequence.

[0028] Figure 5 A schematic structural diagram of an optical imaging lens according to Embodiment 3 of this application is shown;

[0029] Figures 6A to 6D The on-axis chromatic aberration curve, astigmatism curve, distortion curve, and magnification chromatic aberration curve according to Embodiment 3 of this application are shown in sequence.

[0030] Figure 7 A schematic structural diagram of an optical imaging lens according to Embodiment 4 of this application is shown;

[0031] Figures 8A to 8D The on-axis chromatic aberration curve, astigmatism curve, distortion curve, and magnification chromatic aberration curve according to Embodiment 4 of this application are shown in sequence.

[0032] Figure 9A schematic structural diagram of an optical imaging lens according to Embodiment 5 of this application is shown;

[0033] Figures 10A to 10D The on-axis chromatic aberration curve, astigmatism curve, distortion curve, and magnification chromatic aberration curve according to Embodiment 5 of this application are shown in sequence.

[0034] Figure 11 A schematic structural diagram of an optical imaging lens according to Embodiment Six of this application is shown; and

[0035] Figures 12A to 12D The on-axis chromatic aberration curve, astigmatism curve, distortion curve, and magnification chromatic aberration curve according to Embodiment Six of this application are shown in sequence. Detailed Implementation

[0036] 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.

[0037] 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 of the optical imaging lens discussed below may also be referred to as the second lens or the third lens.

[0038] 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.

[0039] 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. In each lens, the surface closest to the subject is called the object-side surface of the lens; in each lens, the surface closest to the imaging plane is called the image-side surface of the lens.

[0040] 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.

[0041] 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 formal sense unless expressly so specified herein.

[0042] 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.

[0043] The features, principles and other aspects of this application are described in detail below.

[0044] An optical imaging lens according to an exemplary embodiment of this application may include: a first lens, a second lens, a third lens, a fourth lens, a fifth lens, and a sixth lens. These six lenses are arranged sequentially along the optical axis from the object side to the image side, and there may be air gaps between adjacent lenses.

[0045] In an exemplary embodiment, the first lens has positive optical power; the second lens has negative optical power, and its image-side surface is concave; the third lens has either positive or negative optical power; the fourth lens has negative optical power; the fifth lens has either positive or negative optical power, and both its object-side and image-side surfaces are convex; the sixth lens has either positive or negative optical power. By appropriately allocating optical power and surface shape, the optical imaging lens can achieve high-resolution imaging.

[0046] In an exemplary embodiment, the optical imaging lens provided in this application may further include an aperture stop, which is disposed between the object side and the first lens.

[0047] In an exemplary embodiment, the optical imaging lens provided in this application can satisfy the condition |R11 / R12|<1, where R11 is the radius of curvature of the object-side surface of the sixth lens, and R12 is the radius of curvature of the image-side surface of the sixth lens. In an exemplary embodiment, R11 and R12 can satisfy |R11 / R12|<0.3. Controlling the radii of curvature of the two mirror surfaces of the sixth lens is beneficial for matching the principal ray angle (CRA) of the optical imaging lens with the photosensitive sensor at the imaging plane, and obtaining a long back working distance, thereby improving the imaging quality of the optical imaging lens.

[0048] In an exemplary embodiment, the optical imaging lens provided in this application can satisfy the condition Fno / ImgH < 0.5mm. -1 Where Fno is the aperture value of the optical imaging lens, and ImgH is half the diagonal length of the effective pixel area at the imaging plane of the optical imaging lens. In an exemplary embodiment, Fno and ImgH can satisfy Fno / ImgH < 0.42mm. -1 By controlling the ratio of aperture value to image height in an optical imaging lens, the lens can achieve both a large image area and a large aperture.

[0049] In an exemplary embodiment, the optical imaging lens provided in this application can satisfy the condition f / R12 < 1, where f is the effective focal length of the optical imaging lens and R12 is the radius of curvature of the image-side surface of the sixth lens. In an exemplary embodiment, f and R12 can satisfy f / R12 < 0.8. By configuring the ratio of the effective focal length of the optical imaging lens to the radius of curvature of the image-side surface of the sixth lens, it is beneficial to correct the axial spherical aberration of the optical imaging lens and improve the imaging quality of the optical imaging lens.

[0050] In an exemplary embodiment, the optical imaging lens provided in this application can satisfy the condition -2 < R1 / R11 < -1, where R12 is the radius of curvature of the object-side surface of the first lens, and R11 is the radius of curvature of the object-side surface of the sixth lens. In an exemplary embodiment, R1 and R11 can satisfy -1.30 < R1 / R11 < -1.03. By controlling the ratio of the radius of curvature of the object-side surface of the first lens to that of the sixth lens, it is beneficial to correct field curvature and astigmatism in the optical imaging system. Furthermore, it makes each lens easier to manufacture and gives it good manufacturing quality.

[0051] In an exemplary embodiment, the optical imaging lens provided in this application can satisfy the condition 0 < (R9 + R10) / (R9 - R10) < 0.5, 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. In an exemplary embodiment, R9 and R10 can satisfy 0.20 < (R9 + R10) / (R9 - R10) < 0.45. By controlling the radii of curvature of the two surfaces of the fifth lens, the contribution of the two surfaces of the fifth lens to the astigmatism of the optical imaging lens can be effectively controlled, thereby controlling the image quality of the central field of view and the aperture band of the optical imaging lens, resulting in high imaging quality of the optical imaging lens.

[0052] In an exemplary embodiment, the optical imaging lens provided in this application can satisfy the condition 1 < T23 / T34 < 2, where T23 is the distance between the second and third lenses on the optical axis, and T34 is the distance between the third and fourth lenses on the optical axis. In an exemplary embodiment, T23 and T34 can satisfy 1.20 < T23 / T34 < 1.85. Controlling the thickness ratio of the air gaps on both sides of the third lens is beneficial to improving the structural compactness of the optical imaging lens, while also reducing the sensitivity of the air gaps to field curvature.

[0053] In an exemplary embodiment, the optical imaging lens provided in this application can satisfy the condition 0.8 < T45 / T56 < 1.3, where T45 is the distance between the fourth and fifth lenses on the optical axis, and T56 is the distance between the fifth and sixth lenses on the optical axis. In an exemplary embodiment, T45 and T56 can satisfy 0.85 < T45 / T56 < 1.25. Controlling the thickness ratio of the air gaps on both sides of the fifth lens can compensate for the distortion of the optical imaging lens and is beneficial for adjusting the contribution of the first to third lenses to the distortion of the optical imaging lens.

[0054] In an exemplary embodiment, the optical imaging lens provided in this application can satisfy the condition 0.7 < CT2 / CT3 < 1.1, where CT2 is the center thickness of the second lens on the optical axis, and CT3 is the center thickness of the third lens on the optical axis. In an exemplary embodiment, CT2 and CT3 can satisfy 0.75 < CT2 / CT3 < 1.05. Controlling the thickness ratio of the second and third lenses helps to ensure the structural compactness of the optical imaging lens, making the optical imaging lens lighter.

[0055] In an exemplary embodiment, the optical imaging lens provided in this application can satisfy the condition 0.7 < CT3 / CT4 < 1.1, where CT3 is the center thickness of the third lens on the optical axis, and CT4 is the center thickness of the fourth lens on the optical axis. In an exemplary embodiment, CT3 and CT4 can satisfy 0.8 < CT3 / CT4 < 1.05. Controlling the thickness ratio of the third and fourth lenses is beneficial for correcting axial chromatic aberration and spherical aberration of the optical imaging system, enabling the optical imaging system to have good imaging performance.

[0056] In an exemplary embodiment, the optical imaging lens provided in this application can satisfy the condition 1.4 < ΣCT / ΣAT < 1.8, where ΣCT is the sum of the center thicknesses of the first to sixth lenses on the optical axis, and ΣAT is the sum of the distances between adjacent lenses on the optical axis. In an exemplary embodiment, ΣCT and ΣAT can satisfy 1.45 < ΣCT / ΣAT < 1.70. By controlling the ratio of the sum of the thicknesses of the lenses from the first to the sixth lenses to the sum of the thicknesses of the air gaps between adjacent lenses, the thickness of each lens can be balanced, thereby controlling the range of residual distortion after lens assembly, and enabling the optical imaging lens to have good distortion performance.

[0057] In an exemplary embodiment, the optical imaging lens provided in this application can satisfy the condition 0.15 < BFL / TTL < 0.2, where BFL is the on-axis distance from the image-side surface of the sixth lens to the imaging surface of the optical imaging lens, and TTL is the on-axis distance from the object-side surface of the first lens to the imaging surface of the optical imaging lens. In an exemplary embodiment, BFL and TTL can satisfy 0.16 < BFL / TTL < 0.19. By controlling the ratio of the back working distance to the optical length, it is beneficial to obtain a longer back working distance, while ensuring that the principal ray angle within the field of view is appropriate, thereby making the optical imaging lens suitable for matching with different image sensors.

[0058] In an exemplary embodiment, the optical imaging lens provided in this application can satisfy the condition 0.8 < ET4 / CT4 < 1, where ET4 is the edge thickness of the fourth lens and CT4 is the center thickness of the fourth lens on the optical axis. In an exemplary embodiment, ET4 and CT4 can satisfy 0.85 < ET4 / CT4 < 0.95. Controlling the ratio of the edge thickness to the center thickness of the fourth lens makes the fourth lens easier to manufacture and gives it better processability.

[0059] In an exemplary embodiment, the optical imaging lens provided in this application satisfies the condition 0.8 < DT21 / DT32 < 1.1, where DT21 is the maximum effective radius of the object-side surface of the second lens, and DT32 is the maximum effective radius of the image-side surface of the third lens. In an exemplary embodiment, DT21 and DT32 can satisfy 0.9 < DT21 / DT32 < 1.05. By controlling the maximum effective radius of the object-side surface of the second lens and the maximum effective radius of the image-side surface of the third lens, the second and third lenses have good manufacturability.

[0060] In an exemplary embodiment, the optical imaging lens provided in this application satisfies the condition 0.8 < DT52 / DT61 ​​< 1, where DT52 is the maximum effective radius of the image-side surface of the fifth lens, and DT61 is the maximum effective radius of the object-side surface of the sixth lens. In an exemplary embodiment, DT52 and DT61 can satisfy 0.85 < DT52 / DT61 ​​< 0.90. By controlling the maximum effective radius of the image-side surface of the fifth lens and the maximum effective radius of the object-side surface of the sixth lens, it is beneficial to improve the relative brightness at the edge of the field of view of the optical imaging lens, thereby improving the chip response at the edge of the field of view and avoiding vignetting in the image.

[0061] In an exemplary embodiment, the optical imaging lens provided in this application can satisfy the condition 0.3 < SAG51 / SAG61 < 0.6, where SAG51 is the axial distance from the intersection of the object-side surface of the fifth lens and the optical axis to the vertex of the effective radius of the object-side surface of the fifth lens, and SAG61 is the axial distance from the intersection of the object-side surface of the sixth lens and the optical axis to the vertex of the effective radius of the object-side surface of the sixth lens. In an exemplary embodiment, SAG51 and SAG61 can satisfy 0.35 < SAG51 / SAG61 < 0.55. By controlling the sagitta of the object-side surface of the fifth lens and the object-side surface of the sixth lens, it is beneficial to make the surface shape of the two mirrors smoothly transition, which is beneficial to the processing and shaping of the two mirrors, and gives the fifth lens and the sixth lens good machinability and process performance.

[0062] Optionally, the aforementioned optical imaging lens may also include a filter for correcting color deviation and / or a protective glass for protecting the photosensitive element located at the imaging surface.

[0063] The optical imaging lens according to the above embodiments of this application can employ multiple lenses, such as the six lenses described above. By rationally allocating the optical power, surface shape, center thickness of each lens, and on-axis spacing between each lens, the optical imaging lens can achieve excellent performance, featuring high pixel count, large aperture, and ease of manufacturing. The optical imaging lens provided in the embodiments of this application has high-quality imaging performance.

[0064] In the embodiments of this application, the mirror surfaces of each lens are mostly aspherical. At least one mirror surface from the object-side surface of the first lens to the image-side surface of the sixth lens is an aspherical mirror. The characteristic of an aspherical lens is that its curvature changes continuously from the center to the periphery. Unlike a spherical lens, which has a constant curvature from the center to the periphery, an aspherical lens has better radius of curvature characteristics, offering advantages in improving distortion aberrations and astigmatism. By using aspherical lenses, aberrations occurring during imaging can be eliminated as much as possible, thereby improving image quality.

[0065] Optionally, at least one of the object-side surface and image-side surface of each of the first, second, third, fourth, fifth, and sixth lenses may be aspherical. Optionally, both the object-side surface and image-side surface of each of the first, second, third, fourth, fifth, and sixth lenses may be aspherical. Optionally, the object-side surface and image-side surface of the first lens, and the object-side surface and image-side surface of the sixth lens are aspherical. Optionally, the object-side surface and image-side surface of the fourth lens, and the object-side surface and image-side surface of the fifth lens are aspherical. Optionally, the image-side surface of the fifth lens and the object-side surface of the sixth lens are aspherical. Optionally, the object-side surface of the first lens, the object-side surface of the fourth lens, the object-side surface of the fifth lens, and the object-side surface of the sixth lens are aspherical.

[0066] 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.

[0067] Example 1

[0068] Reference Figures 1 to 2D The optical imaging lens of this embodiment includes, in sequence along the optical axis from the object side to the image side: a first lens E1, a second lens E2, a third lens E3, a fourth lens E4, a fifth lens E5, a sixth lens E6, and a filter E7. An aperture stop STO can be provided between the first lens E1 and the object side. An air gap can be present between any two adjacent lenses.

[0069] 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 negative optical power, with its object-side surface S5 being concave 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 convex and its image-side surface S10 being convex. The sixth lens E6 has negative optical power, with its object-side surface S11 being concave and its image-side surface S12 being concave. The filter E7 has an object-side surface S13 and an image-side surface S14. The optical imaging lens of this embodiment has an imaging surface S15. Light from the object passes sequentially through each surface (S1 to S14) and is imaged on the imaging surface S15.

[0070] Table 1 shows the basic parameters of the optical imaging lens in this embodiment, where the units for radius of curvature, thickness, and focal length are millimeters (mm), as detailed below:

[0071] Table 1

[0072]

[0073]

[0074] Wherein, TTL is the on-axis distance from the object side surface S1 of the first lens E1 to the imaging surface S15 of the optical imaging lens, ImgH is half the diagonal length of the effective pixel area on the imaging surface of the optical imaging lens, f is the effective focal length of the optical imaging lens, and Fno is the aperture value of the optical imaging lens.

[0075] The object-side surface and image-side surface of any one of the first lens E1 to the sixth lens E6 of this optical imaging lens are aspherical. The surface shape x of each aspherical lens can be defined using, but is not limited to, the following aspherical formula:

[0076]

[0077] 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, A14, A15, A16, A17, A18, A19 ... 10 A 12 A 14 A 16 A 18 and A 20 .

[0078] Table 2

[0079]

[0080] Figure 2A The on-axis chromatic aberration curve of the optical imaging lens of this embodiment is shown, which represents the deviation of the focal point of light of different wavelengths after passing through the optical imaging lens. Figure 2B The astigmatism curve of the optical imaging lens of this embodiment 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 in this embodiment 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 in this embodiment is shown, which represents the deviation of light at different image heights on the imaging plane after passing through the optical imaging lens. According to... Figures 2A to 2D It can be seen that the optical imaging lens provided in this embodiment can achieve good imaging quality.

[0081] Example 2

[0082] The following is for reference Figures 3 to 4D The optical imaging lens according to Embodiment 2 of this application is described below. For the sake of brevity, descriptions similar to those of the optical imaging lens in Embodiment 1 will be omitted in this exemplary embodiment and the following embodiments.

[0083] The optical imaging lens of this embodiment includes, in sequence along the optical axis from the object side to the image side: a first lens E1, a second lens E2, a third lens E3, a fourth lens E4, a fifth lens E5, a sixth lens E6, and a filter E7. An aperture stop STO can be provided between the first lens E1 and the object side. An air gap can be present between any two adjacent lenses.

[0084] 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 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 convex and its image-side surface S10 being convex. The sixth lens E6 has negative optical power, with its object-side surface S11 being concave and its image-side surface S12 being concave. The filter E7 has an object-side surface S13 and an image-side surface S14. The optical imaging lens of this embodiment has an imaging surface S15. Light from the object passes sequentially through each surface (S1 to S14) and is imaged on the imaging surface S15.

[0085] Table 3 shows the basic parameters of the optical imaging lens of this embodiment, wherein the units of radius of curvature, thickness and focal length are millimeters (mm). Table 4 shows the higher-order coefficients of various aspherical surfaces that can be used in the optical imaging lens of this embodiment, wherein the surface shape of each aspherical surface can be defined by the aforementioned formula (1), as follows:

[0086] Table 3

[0087]

[0088] Table 4

[0089]

[0090] Figure 4A The on-axis chromatic aberration curve of the optical imaging lens of this embodiment is shown, which represents the deviation of the focal point of light of different wavelengths after passing through the optical imaging lens. Figure 4B The astigmatism curve of the optical imaging lens of this embodiment 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 in this embodiment 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 in this embodiment is shown, which represents the deviation of light at different image heights on the imaging plane after passing through the optical imaging lens. According to... Figures 4A to 4D It can be seen that the optical imaging lens provided in this embodiment can achieve good imaging quality.

[0091] Example 3

[0092] The following is for reference Figures 5 to 6D This application describes an optical imaging lens according to Embodiment 3. The optical imaging lens of this embodiment includes, sequentially along the optical axis from the object side to the image side: a first lens E1, a second lens E2, a third lens E3, a fourth lens E4, a fifth lens E5, a sixth lens E6, and a filter E7. An aperture stop STO may be provided between the first lens E1 and the object side. An air gap may exist between any two adjacent lenses.

[0093] 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 concave and its image-side surface S6 being convex. The fourth lens E4 has negative optical power, with its object-side surface S7 being concave and its image-side surface S8 being concave. The fifth lens E5 has positive optical power, with its object-side surface S9 being convex and its image-side surface S10 being convex. The sixth lens E6 has negative optical power, with its object-side surface S11 being concave and its image-side surface S12 being concave. The filter E7 has an object-side surface S13 and an image-side surface S14. The optical imaging lens of this embodiment has an imaging surface S15. Light from the object passes sequentially through each surface (S1 to S14) and is imaged onto the imaging surface S15.

[0094] Table 5 shows the basic parameters of the optical imaging lens of this embodiment, wherein the units of radius of curvature, thickness and focal length are millimeters (mm). Table 6 shows the higher-order coefficients of various aspherical surfaces that can be used in the optical imaging lens of this embodiment, wherein the surface shape of each aspherical surface can be defined by the aforementioned formula (1), as follows:

[0095] Table 5

[0096]

[0097] Table 6

[0098]

[0099]

[0100] Figure 6A The on-axis chromatic aberration curve of the optical imaging lens of this embodiment is shown, which represents the deviation of the focal point of light of different wavelengths after passing through the optical imaging lens. Figure 6B The astigmatism curve of the optical imaging lens of this embodiment 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 in this embodiment 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 in this embodiment is shown, which represents the deviation of light at different image heights on the imaging plane after passing through the optical imaging lens. According to... Figures 6A to 6D It can be seen that the optical imaging lens provided in this embodiment can achieve good imaging quality.

[0101] Example 4

[0102] The following is for reference Figures 7 to 8DThis application describes an optical imaging lens according to Embodiment 4. The optical imaging lens of this embodiment includes, sequentially along the optical axis from the object side to the image side: a first lens E1, a second lens E2, a third lens E3, a fourth lens E4, a fifth lens E5, a sixth lens E6, and a filter E7. An aperture stop STO may be provided between the first lens E1 and the object side. An air gap may exist between any two adjacent lenses.

[0103] 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 negative optical power, with its object-side surface S5 being convex and its image-side surface S6 being concave. 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 convex and its image-side surface S10 being convex. The sixth lens E6 has negative optical power, with its object-side surface S11 being concave and its image-side surface S12 being concave. The filter E7 has an object-side surface S13 and an image-side surface S14. The optical imaging lens of this embodiment has an imaging surface S15. Light from the object passes sequentially through each surface (S1 to S14) and is imaged on the imaging surface S15.

[0104] Table 7 shows the basic parameters of the optical imaging lens of this embodiment, wherein the units of radius of curvature, thickness and focal length are millimeters (mm). Table 8 shows the higher-order coefficients of various aspherical surfaces that can be used in the optical imaging lens of this embodiment, wherein the surface shape of each aspherical surface can be defined by the aforementioned formula (1), as follows:

[0105] Table 7

[0106]

[0107]

[0108] Table 8

[0109]

[0110] Figure 8A The on-axis chromatic aberration curve of the optical imaging lens of this embodiment is shown, which represents the deviation of the focal point of light of different wavelengths after passing through the optical imaging lens. Figure 8B The astigmatism curve of the optical imaging lens of this embodiment 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 in this embodiment 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 in this embodiment is shown, which represents the deviation of light at different image heights on the imaging plane after passing through the optical imaging lens. According to... Figures 8A to 8DIt can be seen that the optical imaging lens provided in this embodiment can achieve good imaging quality.

[0111] Example 5

[0112] The following is for reference Figures 9 to 10D This application describes an optical imaging lens according to Embodiment 5. The optical imaging lens of this embodiment includes, sequentially along the optical axis from the object side to the image side: a first lens E1, a second lens E2, a third lens E3, a fourth lens E4, a fifth lens E5, a sixth lens E6, and a filter E7. An aperture stop STO may be provided between the first lens E1 and the object side. An air gap may exist between any two adjacent lenses.

[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 concave and its image-side surface S6 being convex. The fourth lens E4 has negative optical power, with its object-side surface S7 being concave and its image-side surface S8 being concave. The fifth lens E5 has positive optical power, with its object-side surface S9 being convex and its image-side surface S10 being convex. The sixth lens E6 has negative optical power, with its object-side surface S11 being concave and its image-side surface S12 being concave. The filter E7 has an object-side surface S13 and an image-side surface S14. The optical imaging lens of this embodiment has an imaging surface S15. Light from the object passes sequentially through each surface (S1 to S14) and is imaged onto the imaging surface S15.

[0114] Table 9 shows the basic parameters of the optical imaging lens of this embodiment, wherein the units of radius of curvature, thickness and focal length are millimeters (mm). Table 10 shows the higher-order coefficients of various aspherical surfaces that can be used in the optical imaging lens of this embodiment, wherein the surface shape of each aspherical surface can be defined by the aforementioned formula (1), as follows:

[0115] Table 9

[0116]

[0117]

[0118] Table 10

[0119]

[0120] Figure 10A The on-axis chromatic aberration curve of the optical imaging lens of this embodiment is shown, which represents the deviation of the focal point of light of different wavelengths after passing through the optical imaging lens. Figure 10B The astigmatism curve of the optical imaging lens of this embodiment is shown, which represents the meridional image plane curvature and the sagittal image plane curvature. Figure 10CThe distortion curve of the optical imaging lens in this embodiment 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 in this embodiment is shown, which represents the deviation of light at different image heights on the imaging plane after passing through the optical imaging lens. According to... Figures 10A to 10D It can be seen that the optical imaging lens provided in this embodiment can achieve good imaging quality.

[0121] Example 6

[0122] The following is for reference Figures 11 to 12D This application describes an optical imaging lens according to Embodiment Six. The optical imaging lens of this embodiment includes, sequentially along the optical axis from the object side to the image side: a first lens E1, a second lens E2, a third lens E3, a fourth lens E4, a fifth lens E5, a sixth lens E6, and a filter E7. An aperture stop STO may be provided between the first lens E1 and the object side. An air gap may exist between any two adjacent lenses.

[0123] 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 negative optical power, with its object-side surface S5 being concave 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 convex and its image-side surface S10 being convex. The sixth lens E6 has negative optical power, with its object-side surface S11 being concave and its image-side surface S12 being concave. The filter E7 has an object-side surface S13 and an image-side surface S14. The optical imaging lens of this embodiment has an imaging surface S15. Light from the object passes sequentially through each surface (S1 to S14) and is imaged on the imaging surface S15.

[0124] Table 11 shows the basic parameters of the optical imaging lens of this embodiment, wherein the units of radius of curvature, thickness and focal length are millimeters (mm). Table 12 shows the higher-order coefficients of various aspherical surfaces that can be used in the optical imaging lens of this embodiment, wherein the surface shape of each aspherical surface can be defined by the aforementioned formula (1), as follows:

[0125] Table 11

[0126]

[0127] Table 12

[0128]

[0129] Figure 12AThe on-axis chromatic aberration curve of the optical imaging lens of this embodiment is shown, which represents the deviation of the focal point of light of different wavelengths after passing through the optical imaging lens. Figure 12B The astigmatism curve of the optical imaging lens of this embodiment 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 in this embodiment is shown, which represents the distortion magnitude value corresponding to different image heights. Figure 12D The magnification chromatic aberration curve of the optical imaging lens in this embodiment is shown, which represents the deviation of light at different image heights on the imaging plane after passing through the optical imaging lens. According to... Figures 12A to 12D It can be seen that the optical imaging lens provided in this embodiment can achieve good imaging quality.

[0130] In summary, Examples 1 to 6 correspond to the relationships shown in Table 13 below.

[0131] Table 13

[0132] Conditional Implementation Examples 1 2 3 4 5 6 |R11 / R12| 0.03 0.25 0.04 0.08 0.02 0.04 f / R12 0.10 0.72 0.15 0.28 0.08 0.12 <![CDATA[Fno / ImgH(mm -1 )]]> 0.26 0.39 0.39 0.38 0.31 0.40 R1 / R11 -1.25 -1.05 -1.26 -1.22 -1.16 -1.22 (R9+R10) / (R9-R10) 0.25 0.38 0.29 0.40 0.21 0.35 T23 / T34 1.61 1.25 1.53 1.81 1.80 1.52 T45 / T56 1.22 1.12 1.24 1.03 0.92 0.88 CT2 / CT3 0.94 0.79 1.01 0.97 0.97 1.00 CT3 / CT4 0.81 0.91 0.81 0.83 0.93 1.00 ∑CT / ∑AT 1.67 1.66 1.63 1.68 1.48 1.57 BFL / TTL 0.18 0.18 0.18 0.18 0.16 0.18 ET4 / CT4 0.91 0.93 0.86 0.86 0.90 0.93 DT21 / DT32 0.99 0.94 1.00 0.99 1.02 0.90 DT52 / DT61 0.86 0.86 0.87 0.86 0.86 0.88 SAG51 / SAG61 0.50 0.52 0.47 0.42 0.38 0.42

[0133] 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 six lenses are described as an example in the embodiments, the optical imaging lens is not limited to including six lenses. If desired, the optical imaging lens may also include other numbers of lenses.

[0134] In an exemplary embodiment, this application also provides a camera device equipped with an electronic photosensitive element for imaging. The electronic photosensitive element may be a photocoupled device (CCD) or a complementary metal oxide semiconductor device (CMOS). The camera device may be a standalone camera device such as a digital camera, or a camera module integrated into a mobile electronic device such as a mobile phone. The camera device is equipped with the optical imaging lens described above.

[0135] Exemplary embodiments of this application have been described above with reference to the accompanying drawings. Those skilled in the art should understand that the above embodiments are merely illustrative examples and are not intended to limit the scope of this application. Any modifications, equivalent substitutions, etc., made within the teachings and scope of the claims of this application should be included within the scope of protection claimed in this application.

Claims

1. An optical imaging lens, characterized in that, sequentially arranged from the object side to the image side along the optical axis include: a first lens with positive refractive power, whose object side surface is convex and whose image side surface is concave; a second lens with negative refractive power, whose object side surface is convex and whose image side surface is concave; a third lens with refractive power; a fourth lens with negative refractive power; a fifth lens with positive refractive power, whose object side surface is convex and whose image side surface is convex; a sixth lens with negative refractive power, whose object side surface and image side surface are both concave and aspherical; the number of lenses with refractive power in the optical imaging lens is six; the effective focal length f of the optical imaging lens and the radius of curvature R12 of the image side surface of the sixth lens satisfy 0.08≤f / R12≤0.72; the central thickness CT2 of the second lens on the optical axis and the central thickness CT3 of the third lens on the optical axis satisfy 0.75<CT2 / CT3<1.05; the radius of curvature R9 of the object side surface of the fifth lens and the radius of curvature R10 of the image side surface of the fifth lens satisfy 0.20<(R9+R10) / (R9-R10)≤0.40; and the interval distance T23 of the second lens and the third lens on the optical axis and the interval distance T34 of the third lens and the fourth lens on the optical axis satisfy 1.25≤T23 / T34<1.

85. 2.The optical imaging lens according to claim 1, wherein, the radius of curvature R11 of the object side surface of the sixth lens and the radius of curvature R12 of the image side surface of the sixth lens satisfy 0.02≤|R11 / R12|≤0.

25. 3.The optical imaging lens according to claim 1, wherein, The aperture value Fno of the optical imaging lens and half of the diagonal length of the effective pixel area on the imaging surface of the optical imaging lens ImgH satisfy 0.26 mm -1 ≤ Fno / ImgH < 0.42 mm -1 . 4.The optical imaging lens according to claim 1, wherein, the on-axis distance BFL from the image side surface of the sixth lens to the imaging surface of the optical imaging lens and the on-axis distance TTL from the object side surface of the first lens to the imaging surface of the optical imaging lens satisfy 0.15<BFL / TTL<0.

2.

5. The optical imaging lens according to claim 1, characterized in that, the maximum effective radius DT52 of the image side surface of the fifth lens and the maximum effective radius DT61 of the object side surface of the sixth lens satisfy 0.85<DT52 / DT61<0.

90. 6.The optical imaging lens according to claim 1, wherein, the radius of curvature R1 of the object side surface of the first lens and the radius of curvature R11 of the object side surface of the sixth lens satisfy -1.30<R1 / R11<-1.

03. 7.The optical imaging lens according to claim 1, wherein, the interval distance T45 of the fourth lens and the fifth lens on the optical axis and the interval distance T56 of the fifth lens and the sixth lens on the optical axis satisfy 0.85<T45 / T56<1.

25. 8.The optical imaging lens according to claim 1, wherein, the central thickness CT3 of the third lens on the optical axis and the central thickness CT4 of the fourth lens on the optical axis satisfy 0.8<CT3 / CT4≤1.

00. 9.The optical imaging lens according to claim 1, wherein, the sum ΣCT of the central thicknesses of the first lens to the sixth lens on the optical axis respectively and the sum ΣAT of the interval distances of any two adjacent lenses among the first lens to the sixth lens on the optical axis satisfy 1.45<ΣCT / ΣAT<1.

70. 10.The optical imaging lens according to claim 1, wherein, the edge thickness ET4 of the fourth lens and the central thickness CT4 of the fourth lens on the optical axis satisfy 0.85<ET4 / CT4<0.

95. 11.The optical imaging lens according to claim 1, wherein, A maximum effective radius DT21 of an object side surface of the second lens and a maximum effective radius DT32 of an image side surface of the third lens satisfy 0.90≤DT21 / DT32<1.

05.

12. The optical imaging lens according to any one of claims 1-11, wherein, An on-axis distance SAG51 from an intersection of an object side surface of the fifth lens and the optical axis to an effective radius vertex of the object side surface of the fifth lens and an on-axis distance SAG61 from an intersection of an object side surface of the sixth lens and the optical axis to an effective radius vertex of the object side surface of the sixth lens satisfy 0.35<SAG51 / SAG61<0.55.

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