Optical imaging lens

Abstract

This application provides an optical imaging lens, which comprises, along the optical axis from the object side to the image side, the following in sequence: a first lens with negative optical power, the image side of which is concave; a second lens with positive optical power, the image side of which is convex; a third lens with positive optical power, the object side of which is convex and the image side of which is convex; and a fourth lens with negative optical power, the object side of which is convex and the image side of which is concave; wherein the center thickness CT2 of the second lens on the optical axis, the center thickness CT3 of the third lens on the optical axis, and the distance TTL from the object side of the first lens to the imaging surface of the optical imaging lens on the optical axis satisfy 1.4 < (CT2 + CT3) / TTL × 5 < 1.9; and the number of lenses with optical power in the optical imaging lens is four.

Description

[0001] Divisional application statement

[0002] This application is a divisional application of Chinese invention patent application filed on May 24, 2019, entitled "Optical Imaging Lens" and with application number 201910437472.6. Technical Field

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

[0004] The requirements for the imaging function of portable electronic devices are becoming increasingly demanding. Although image processing algorithms are usually used to process images, the optical characteristics of the optical imaging lens directly affect the imaging quality of the initial image. Therefore, the performance requirements for the optical imaging lens used with portable electronic devices are also becoming increasingly demanding.

[0005] For example, the mobile phone industry tends to use multiple optical imaging lenses for multi-camera setups, with each lens highlighting different optical characteristics. This typically includes a lens with a wide field of view, which, combined with image processing algorithms, achieves a broad shooting field. However, because portable electronic devices are expected to be as small as possible, it is desirable for them to have fewer lenses. Furthermore, achieving high image quality makes the lenses more difficult to manufacture. Summary of the Invention

[0006] This application provides an optical imaging lens device that can at least solve or partially solve at least one of the above-mentioned disadvantages in the prior art, such as a wide-angle fixed-focus optical imaging lens.

[0007] On one hand, this application provides an optical imaging lens, which may include, along the optical axis from the object side to the image side, the following in sequence: a first lens having negative optical power; a second lens having optical power, the image side of which is convex; a third lens having optical power, the object side of which is convex; and a fourth lens having negative optical power, the object side of which is convex and the image side of which is concave.

[0008] According to the embodiments of this application, the spacing T12 between the first lens and the second lens on the optical axis, the spacing T23 between the second lens and the third lens on the optical axis, and half of the diagonal length ImgH of the effective pixel area on the imaging surface of the optical imaging lens can satisfy 0.4<(T12+T23) / ImgH<0.6.

[0009] According to an embodiment of this application, the optical imaging lens may further include an aperture stop, which is disposed between the first lens and the second lens.

[0010] According to the embodiments of this application, the center thickness CT2 of the second lens on the optical axis, the center thickness CT3 of the third lens on the optical axis, and the distance TTL from the object side of the first lens to the imaging surface of the optical imaging lens on the optical axis can satisfy 1.4 < (CT2 + CT3) / TTL × 5 < 1.9.

[0011] According to the embodiments of this application, the effective half-aperture DT22 of the image side of the second lens, the effective half-aperture DT32 of the image side of the third lens, and the effective half-aperture DT42 of the image side of the fourth lens can satisfy 1.0 < (DT22 + DT32) / DT42 < 1.3.

[0012] According to the embodiments of this application, the effective half-aperture DT11 of the object side of the first lens, the effective half-aperture DT12 of the image side of the first lens, and half the diagonal length ImgH of the effective pixel area on the imaging surface of the optical imaging lens can satisfy 0.8<(DT11+DT12) / ImgH<1.2.

[0013] According to the embodiments of this application, the maximum semi-field-of-view (Semi-FOV) of the optical imaging lens can satisfy 55°≤Semi-FOV≤70°.

[0014] According to an embodiment of this application, the effective focal length f4 of the fourth lens and the effective focal length f1 of the first lens can satisfy 0.1. <f4 / f1<1。

[0015] According to the embodiments of this application, the effective focal length f2 of the second lens, the effective focal length f3 of the third lens, and the effective focal length f of the optical imaging lens can satisfy 2.3 < (f2 + f3) / f < 3.8.

[0016] According to an embodiment of this application, the effective focal length f2 of the second lens and the radius of curvature R2 of the image-side surface of the first lens can satisfy 0.1. <f2 / R2<1.8。

[0017] According to an embodiment of this application, the radius of curvature R4 of the image-side surface of the second lens and the radius of curvature R6 of the image-side surface of the third lens can satisfy 0.2. <R4 / R6<2.3。

[0018] According to an embodiment of this application, the radius of curvature R7 of the object-side surface of the fourth lens and the radius of curvature R8 of the image-side surface of the fourth lens can satisfy 1.5. <R7 / R8<2.7。

[0019] According to the embodiments of this application, the Abbe number V1 of the first lens can satisfy V1>55, and the Abbe number V2 of the second lens can satisfy V2>55.

[0020] This application provides an optical imaging lens comprising multiple (e.g., four) lenses. By rationally allocating the optical power, surface shape, center thickness of each lens, and on-axis spacing between each lens, the aforementioned camera lens assembly achieves the beneficial effects of miniaturization and high imaging quality. Furthermore, by controlling the ratio of the on-axis spacing T12 between the first and second lenses to the on-axis spacing T23 between the second and third lenses, and to half the diagonal length (ImgH) of the effective pixel area on the imaging plane of the optical imaging lens, the optical imaging lens becomes smaller in size and the intensity of ghosting caused by the spacing between the first and second lenses is reduced, as is the intensity of ghosting caused by the spacing between the second and third lenses, thereby further improving image quality. Moreover, the third lens has a thicker periphery, resulting in better manufacturability and reducing the manufacturing difficulty of the optical imaging lens. Attached Figure Description

[0021] 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:

[0022] Figure 1 A schematic structural diagram of an optical imaging lens according to Embodiment 1 of this application is shown;

[0023] Figures 2A to 2D The on-axis chromatic aberration curve, magnification chromatic aberration curve, astigmatism curve and distortion curve according to Embodiment 1 of this application are shown in sequence.

[0024] Figure 3 A schematic structural diagram of an optical imaging lens according to Embodiment 2 of this application is shown;

[0025] Figures 4A to 4D The on-axis chromatic aberration curve, magnification chromatic aberration curve, astigmatism curve and distortion curve according to Embodiment 2 of this application are shown in sequence.

[0026] Figure 5 A schematic structural diagram of an optical imaging lens according to Embodiment 3 of this application is shown;

[0027] Figures 6A to 6D The on-axis chromatic aberration curve, magnification chromatic aberration curve, astigmatism curve and distortion curve according to Embodiment 3 of this application are shown in sequence.

[0028] Figure 7 A schematic structural diagram of an optical imaging lens according to Embodiment 4 of this application is shown;

[0029] Figures 8A to 8D The on-axis chromatic aberration curve, magnification chromatic aberration curve, astigmatism curve and distortion curve according to Embodiment 4 of this application are shown in sequence.

[0030] Figure 9 A schematic structural diagram of an optical imaging lens according to Embodiment 5 of this application is shown;

[0031] Figures 10A to 10D The on-axis chromatic aberration curve, magnification chromatic aberration curve, astigmatism curve and distortion curve according to Embodiment 5 of this application are shown in sequence.

[0032] Figure 11 A schematic structural diagram of an optical imaging lens according to Embodiment Six of this application is shown;

[0033] Figures 12A to 12D The on-axis chromatic aberration curve, magnification chromatic aberration curve, astigmatism curve, and distortion curve according to Embodiment Six of this application are shown in sequence. Detailed Implementation

[0034] 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.

[0035] 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.

[0036] 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.

[0037] 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.

[0038] 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.

[0039] 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.

[0040] 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.

[0041] The features, principles and other aspects of this application are described in detail below.

[0042] An optical imaging lens according to an exemplary embodiment of this application may include: a first lens, a second lens, a third lens, and a fourth lens. These four 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.

[0043] In an exemplary embodiment, the first lens may have negative optical power, the second lens has optical power and its image-side is convex; the third lens has optical power and its object-side is convex; the fourth lens has negative optical power, its object-side is convex, and its image-side is concave. By rationally configuring the optical power of the lenses, the off-axis aberration of the optical imaging lens is corrected, and the image quality is improved. The first lens with negative optical power can effectively converge light. The image-side of the second lens is convex, and the object-side of the third lens is convex, which can effectively enhance the aberration correction capability of the lens assembly. The fourth lens with negative optical power is beneficial to the optical power distribution of each lens element, making the field of view of the optical imaging lens large, the imaging range wide, and the system sensitivity low. Furthermore, the object-side of the fourth lens is convex, and the image-side is concave, which balances the transverse chromatic aberration and lateral chromatic aberration of the lens.

[0044] In an exemplary embodiment, the optical imaging lens provided by this application satisfies the condition 0.4 < (T12 + T23) / ImgH < 0.6, where T12 is the distance between the first and second lenses on the optical axis, T23 is the distance between the second and third lenses on the optical axis, and ImgH is half the diagonal length of the effective pixel area on the imaging plane of the optical imaging lens. Exemplarily, the optical imaging lens of this application satisfies the condition 0.4 < (T12 + T23) / ImgH < 0.55. By setting the range of the value of (T12 + T23) / ImgH, the distribution of the first, second, and third lenses can be made reasonable, and their combination with the image plane results in a small optical imaging lens size. The ghost image intensity caused by the distance T12 between the first and second lenses on the optical axis is weak, and the ghost image intensity caused by the distance T23 between the second and third lenses on the optical axis is also weak. Since the third lens can be well matched with the first two lenses, the periphery of the third lens is thicker, which has better manufacturability and reduces the chromatic aberration of the optical imaging lens, thereby further improving the imaging quality.

[0045] In an exemplary embodiment, the optical imaging lens may further include an aperture stop, which may be disposed between the first lens and the second lens. Distributing an aperture stop between the first lens and the second lens can increase the field of view of the optical imaging system, expand the imaging range, and reduce aberrations caused by manufacturing processes, thereby improving production yield.

[0046] In an exemplary embodiment, the optical imaging lens can satisfy the condition 1.4 < (CT2 + CT3) / TTL × 5 < 1.9, where CT2 is the center thickness of the second lens on the optical axis, CT3 is the center thickness of the third lens on the optical axis, and TTL is the distance on the optical axis from the object-side surface of the first lens to the imaging surface of the optical imaging lens. Exemplarily, the optical imaging lens can also satisfy the condition 1.47 ≤ (CT2 + CT3) / TTL × 5 ≤ 1.82. By controlling the ratio of the sum of the center thicknesses of the second and third lenses to the distance on the optical axis from the object-side surface of the first lens to the imaging surface of the optical imaging lens, the second and third lenses can have good manufacturability, and the overall size of the optical imaging lens can be reduced. The ghost image intensity caused by the second and third lenses is relatively weak, and together with the first lens, it reduces the chromatic aberration and distortion of the image formed by the optical imaging lens. Furthermore, the center thickness of the third lens is not too large, which helps to reduce the sensitivity of the optical imaging lens.

[0047] In an exemplary embodiment, the optical imaging lens can satisfy the condition 1.0 < (DT22 + DT32) / DT42 < 1.3, where DT22 is the effective half-aperture of the image-side surface of the second lens, DT32 is the effective half-aperture of the image-side surface of the third lens, and DT42 is the effective half-aperture of the image-side surface of the fourth lens. Exemplarily, the optical imaging lens can also satisfy the condition 1.05 < (DT22 + DT32) / DT42 < 1.25, for example, 1.05 < (DT22 + DT32) / DT42 < 1.20. Controlling the effective half-aperture of the image-side surfaces of the second, third, and fourth lenses can increase the light transmission of the optical imaging lens and effectively increase the relative illumination of the edge field of view, enabling the optical imaging lens to have better imaging quality in low-light environments.

[0048] In an exemplary embodiment, the optical imaging lens can satisfy the condition 0.8 < (DT11 + DT12) / ImgH < 1.2, where DT11 is the effective half-aperture of the object-side surface of the first lens, DT12 is the effective half-aperture of the image-side surface of the first lens, and ImgH is half the diagonal length of the effective pixel area on the imaging plane of the optical imaging lens. Exemplarily, the optical imaging lens can also satisfy the condition 0.9 < (DT11 + DT12) / ImgH < 1.2, for example, 0.9 < (DT11 + DT12) / ImgH < 1.1. By controlling the effective half-aperture of the object-side and image-side surfaces of the first lens and half the diagonal length of the effective pixel area on the imaging plane, the illuminance of the optical imaging lens is controlled, resulting in better image quality in low-light environments. Furthermore, it also controls the depth of the optical imaging lens, enabling it to have a small window effect. The optical imaging lens provided in this application is suitable for use in, for example, multi-camera mobile phones and other cameras.

[0049] In an exemplary embodiment, the optical imaging lens can satisfy the condition 55°≤Semi-FOV≤70°, where Semi-FOV is the maximum half-field-of-view angle of the optical imaging lens. Controlling the maximum half-field-of-view angle can make the image height of the optical imaging lens higher while reducing aberrations at the edge of the field of view, thus giving the optical imaging lens the effect of wide imaging range and high imaging quality.

[0050] In an exemplary embodiment, the optical imaging lens may satisfy the conditional formula 0.1 < f4 / f1 < 1, where f4 is the effective focal length of the fourth lens and f1 is the effective focal length of the first lens. Exemplarily, the optical imaging lens may satisfy the conditional formula 0.35 < f4 / f1 < 1. Exemplarily, 0.1 < f4 / f1 < 0.7. By controlling the ratio of the effective focal length of the first lens to the effective focal length of the fourth lens, the optical powers of the foregoing four lenses can be adapted to each other and the optical power of the third lens can be prevented from being too large, so that the optical imaging lens has low sensitivity and good imaging quality. At the same time, the optical imaging lens has a short optical length.

[0051] In an exemplary embodiment, the optical imaging lens may satisfy the conditional formula 2.3 < (f2 + f3) / f < 3.8, where f2 is the effective focal length of the second lens, f3 is the effective focal length of the third lens, and f is the effective focal length of the optical imaging lens. Exemplarily, the optical imaging lens may satisfy the conditional formula 2.6 < (f2 + f3) / f < 3.8. For example, 2.6 < (f2 + f3) / f < 3.3. By controlling the effective focal length of the second lens, the effective focal length of the third lens, and the focal length of the optical imaging lens, the optical imaging lens has good aberration correction ability. Moreover, the optical imaging lens has a small size and each lens has good processability.

[0052] In an exemplary embodiment, the optical imaging lens may satisfy the conditional formula 0.1 < f2 / R2 < 1.8, where f2 is the effective focal length of the second lens and R2 is the radius of curvature of the image side surface of the first lens. Exemplarily, the optical imaging lens may satisfy the conditional formula 0.1 < f2 / R2 < 0.6. For example, 0.18 < f2 / R2 < 0.55. By controlling the effective focal length of the second lens and the radius of curvature of the image side surface of the first lens, the astigmatism contribution and coma contribution of the second lens are relatively low, and the astigmatism and coma generated by the first lens, the third lens, and the fourth lens can be balanced, so that the optical imaging lens has good imaging quality.

[0053] In an exemplary embodiment, the optical imaging lens may satisfy the conditional formula 0.2 < R4 / R6 < 2.3, where R4 is the radius of curvature of the image side surface of the second lens and R6 is the radius of curvature of the image side surface of the third lens. Exemplarily, the optical imaging lens may satisfy the conditional formula 0.11 < R4 / R6 < 2.3. For example, 0.13 < R4 / R6 < 2.3. By controlling the radius of curvature of the image side surface of the second lens and the radius of curvature of the image side surface of the third lens, the astigmatism and coma generated by the second lens and the third lens can be effectively balanced, so that the optical imaging lens has good imaging quality.

[0054] In an exemplary embodiment, the optical imaging lens may satisfy the condition 1.5 < R7 / R8 < 2.7, where R7 is the curvature radius of the object side surface of the fourth lens, and R8 is the curvature radius of the image side surface of the fourth lens. Exemplarily, the optical imaging lens may satisfy the condition 2.0 < R7 / R8 < 2.7, for example, 2.5 < R7 / R8 < 2.7. By controlling the curvature radius of the object side surface and the curvature radius of the image side surface of the fourth lens, the optical power of the optical imaging lens is evenly distributed among the respective lenses, thereby balancing the vertical chromatic aberration and the lateral chromatic aberration.

[0055] In an exemplary embodiment, the optical imaging lens may satisfy the conditions V1 > 55 and V2 > 55, where V1 is the Abbe number of the first lens and V2 is the Abbe number of the second lens. Exemplarily, V1 > 55.5 and V2 > 55.5. By controlling the Abbe numbers of the first lens and the second lens respectively, the first lens and the second lens have less dispersion, the imaging chromatic aberration of the optical imaging lens is small, and the object viewing is clearer.

[0056] Optionally, the above optical imaging lens may further include a filter for correcting color deviation and / or a protective glass for protecting the photosensitive element located at the imaging surface.

[0057] The camera lens group according to the above embodiment of the present application may adopt multiple lenses, such as the four lenses described above. By reasonably distributing the optical power, surface type, central thickness of each lens, and the on-axis spacing between each lens, etc., the volume of the lens can be effectively reduced, the sensitivity of the lens can be reduced, and the processability of the lens can be improved, making the camera lens group more conducive to production and processing and applicable to portable electronic products.

[0058] In the embodiment of the present application, the mirror surfaces of each lens mostly adopt aspherical mirror surfaces. At least one of the mirror surfaces from the object side surface of the first lens to the image side surface of the fourth lens is an aspherical mirror surface. The characteristics of an aspherical lens are that the curvature changes continuously from the center of the lens to the periphery of the lens. Different from a spherical lens with a constant curvature from the center of the lens to the periphery of the lens, an aspherical lens has better curvature radius characteristics and has the advantages of improving distortion aberration and improving astigmatism aberration. After adopting an aspherical lens, it is possible to eliminate the aberration that appears during imaging as much as possible, thereby improving the imaging quality. Optionally, at least one of the object side surface and the image side surface of each of the first lens, the second lens, the third lens, and the fourth lens may be aspherical. Optionally, both the object side surface and the image side surface of each of the first lens, the second lens, the third lens, and the fourth lens may be aspherical.

[0059] The following further describes specific embodiments of the optical imaging lens applicable to the above embodiments with reference to the accompanying drawings.

[0060] Embodiment 1

[0061] 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, and a filter E5. An aperture stop STO (not shown) may be provided between the first lens E1 and the second lens E2. An air gap may be present between any two adjacent lenses.

[0062] The first lens E1 has negative optical power, with its object-side surface S1 being convex and its image-side surface S2 being concave. The second lens E2 has positive optical power, with its object-side surface S3 being convex and its image-side surface S4 being convex. The third lens E3 has 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 filter E5 has an object-side surface S9 and an image-side surface S10. The optical imaging lens of this embodiment has an imaging surface S11. Light from the object passes sequentially through each surface (S1 to S10) and is imaged on the imaging surface S11.

[0063] 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:

[0064] Table 1

[0065]

[0066] Where TTL is the distance on the optical axis between the object side S1 of the first lens E1 and the imaging surface S11 of the optical imaging lens, ImgH is half the length of the diagonal of the effective pixel area on the imaging surface S11, Semi-FOV is the maximum half field of view of the optical imaging lens, and f is the effective focal length of the optical imaging lens.

[0067] The object-side surface and image-side surface of any one of the first lens E1 to the fourth lens E4 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:

[0068]

[0069] 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, A1, A2, A3, A4, A5, A6, A8, A1, A1, A2, A3, A4, A5, A6, A1, A2, A3, A4, A5, A6, A7, A8, A1, A1, A1, A1, A2, A3 ... 10 A 12 A 14A 16 A 18 and A 20 .

[0070] Table 2

[0071] Face number A4 A6 A8 A10 A12 A14 A16 A18 A20 S1 3.8652E-01 -1.7473E-01 -5.1803E-01 1.7045E+00 -2.2874E+00 1.6344E+00 -6.0768E-01 9.0975E-02 0.0000E+00 S2 4.6247E-01 3.6442E+00 -3.3946E+01 1.6900E+02 -4.9242E+02 8.4770E+02 -8.0284E+02 3.1931E+02 0.0000E+00 S3 -6.9278E-01 2.5705E+01 -9.4675E+02 1.9860E+04 -2.5630E+05 2.0513E+06 -9.8983E+06 2.6273E+07 -2.9327E+07 S4 -1.0043E-01 -7.2035E+00 5.1719E+01 -2.1610E+02 4.9091E+02 -4.9768E+02 -8.2424E+01 5.2291E+02 -2.4234E+02 S5 1.6008E-01 -2.5374E+00 1.0349E+01 -2.5414E+01 2.5635E+01 2.5941E+01 -1.0605E+02 1.1396E+02 -4.2522E+01 S6 6.2659E-01 -3.2412E+00 1.0826E+01 -1.6470E+01 1.4734E+00 2.9591E+01 -4.1643E+01 2.4086E+01 -5.1773E+00 S7 -7.9114E-01 -1.7444E+00 4.4137E+00 2.6199E+00 -2.3053E+01 3.3515E+01 -2.0361E+01 4.5947E+00 0.0000E+00 S8 -1.5702E+00 1.8461E+00 -1.3994E+00 2.1047E-01 6.3147E-01 -6.5092E-01 3.0380E-01 -7.2310E-02 7.0335E-03

[0072] 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 optical system. Figure 2B The magnification chromatic aberration curve of the optical imaging lens of Embodiment 1 is shown, which represents the deviation of light at different image heights on the imaging plane after passing through the optical system. Figure 2C 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 2D The distortion curve of the optical imaging lens in Embodiment 1 is shown, representing the distortion magnitude corresponding to different field of view angles. According to... Figures 2A to 2D As can be seen, the optical imaging lens given in Example 1 can achieve good imaging quality.

[0073] Example 2

[0074] 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.

[0075] Reference Figure 3 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, and a filter E5. An aperture stop STO (not shown) may be provided between the first lens E1 and the second lens E2. An air gap may be present between any two adjacent lenses.

[0076] The first lens E1 has negative optical power, with its object-side surface S1 being concave and its image-side surface S2 being concave. The second lens E2 has positive optical power, with its object-side surface S3 being convex and its image-side surface S4 being convex. The third lens E3 has 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 filter E5 has an object-side surface S9 and an image-side surface S10. The optical imaging lens of this embodiment has an imaging surface S11. Light from the object passes sequentially through each surface (S1 to S10) and is imaged on the imaging surface S11.

[0077] 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:

[0078] Table 3

[0079]

[0080]

[0081] Table 4

[0082] Face number A4 A6 A8 A10 A12 A14 A16 A18 A20 S1 8.2840E-01 -1.5298E+00 2.7696E+00 -3.8137E+00 3.6627E+00 -2.2441E+00 7.6803E-01 -1.1129E-01 0.0000E+00 S2 1.2102E+00 -1.7547E+00 1.1971E+00 2.6924E+01 -1.5996E+02 4.4465E+02 -6.0333E+02 3.1029E+02 0.0000E+00 S3 -4.0935E-01 1.5143E+00 -5.4431E+01 6.3812E+02 -3.8408E+03 8.8339E+03 0.0000E+00 0.0000E+00 0.0000E+00 S4 -3.3675E-01 -5.8485E+00 9.1612E+01 -9.0234E+02 5.4405E+03 -2.0537E+04 4.7185E+04 -6.0291E+04 3.2762E+04 S5 2.8070E-01 -1.4428E+00 6.5211E+00 -2.2062E+01 4.5444E+01 -5.4447E+01 3.1264E+01 -2.4613E+00 -3.1963E+00 S6 8.1850E-01 -3.3818E+00 9.2438E+00 -8.7175E+00 -1.5138E+01 5.0453E+01 -5.8298E+01 3.2005E+01 -6.9085E+00 S7 -4.9718E-01 -2.5831E+00 9.9428E+00 -1.9799E+01 2.4918E+01 -2.0479E+01 9.9500E+00 -2.1070E+00 0.0000E+00 S8 -1.1927E+00 1.9818E+00 -2.3967E+00 2.0960E+00 -1.2879E+00 5.3023E-01 -1.3558E-01 1.8707E-02 -9.8000E-04

[0083] 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 system. Figure 4B 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 surface after passing through the optical system. Figure 4C 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 4D The distortion curve of the optical imaging lens in this embodiment is shown, representing the distortion magnitude corresponding to different field of view angles. According to... Figures 4A to 4D It can be seen that the optical imaging lens provided in this embodiment can achieve good imaging quality.

[0084] Example 3

[0085] The following is for reference Figures 5 to 6D This describes an optical imaging lens according to Embodiment 3 of this application. (Refer to...) Figure 5 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, and a filter E5. An aperture stop STO (not shown) may be provided between the first lens E1 and the second lens E2. An air gap may be present between any two adjacent lenses.

[0086] The first lens E1 has negative optical power, with its object-side surface S1 being concave and its image-side surface S2 being concave. The second lens E2 has positive optical power, with its object-side surface S3 being concave and its image-side surface S4 being convex. 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 filter E5 has an object-side surface S9 and an image-side surface S10. The optical imaging lens of this embodiment has an imaging surface S11. Light from the object passes sequentially through each surface (S1 to S10) and is imaged on the imaging surface S11.

[0087] 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:

[0088] Table 5

[0089]

[0090]

[0091] Table 6

[0092] Face number A4 A6 A8 A10 A12 A14 A16 A18 A20 S1 4.1192E-01 -5.3758E-01 1.0283E+00 -1.5362E+00 1.6925E+00 -1.2878E+00 6.3674E-01 -1.5355E-01 0.0000E+00 S2 7.8928E-01 -2.9304E+00 1.7245E+01 -6.6615E+01 1.5567E+02 -2.0800E+02 1.4400E+02 -3.9965E+01 0.0000E+00 S3 -5.1370E-01 2.7980E+00 -7.4991E+01 7.4294E+02 -3.7968E+03 7.4452E+03 0.0000E+00 0.0000E+00 0.0000E+00 S4 -1.9370E-01 -5.7271E+00 7.3290E+01 -6.3524E+02 3.5179E+03 -1.2566E+04 2.7870E+04 -3.4871E+04 1.8733E+04 S5 3.9905E-01 -2.4635E+00 1.2078E+01 -4.2185E+01 9.3083E+01 -1.2504E+02 9.3921E+01 -3.2958E+01 3.0751E+00 S6 1.1624E+00 -5.8005E+00 2.1902E+01 -4.9868E+01 6.5754E+01 -4.5221E+01 8.0043E+00 7.3309E+00 -3.1280E+00 S7 -1.6978E-01 -4.6862E+00 2.0467E+01 -5.0846E+01 7.6778E+01 -6.9281E+01 3.4097E+01 -6.9909E+00 0.0000E+00 S8 -1.1833E+00 2.1614E+00 -3.0419E+00 3.0042E+00 -1.9902E+00 8.3823E-01 -2.0493E-01 2.3778E-02 -6.2000E-04

[0093] 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 system. Figure 6B 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 surface after passing through the optical system. Figure 6C 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 6D The distortion curve of the optical imaging lens in this embodiment is shown, representing the distortion magnitude corresponding to different field of view angles. According to... Figures 6A to 6D It can be seen that the optical imaging lens provided in this embodiment can achieve good imaging quality.

[0094] Example 4

[0095] The following is for reference Figures 7 to 8D This describes an optical imaging lens according to Embodiment 4 of this application. (Refer to...) Figure 7The 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, and a filter E5. An aperture stop STO (not shown) may be provided between the first lens E1 and the second lens E2. An air gap may be present between any two adjacent lenses.

[0096] The first lens E1 has negative optical power, with its object-side surface S1 being concave and its image-side surface S2 being concave. The second lens E2 has positive optical power, with its object-side surface S3 being convex and its image-side surface S4 being convex. The third lens E3 has 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 filter E5 has an object-side surface S9 and an image-side surface S10. The optical imaging lens of this embodiment has an imaging surface S11. Light from the object passes sequentially through each surface (S1 to S10) and is imaged on the imaging surface S11.

[0097] 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:

[0098] Table 7

[0099]

[0100]

[0101] Table 8

[0102] Face number A4 A6 A8 A10 A12 A14 A16 A18 A20 S1 7.0971E-01 -7.8601E-01 1.3237E-01 2.8375E+00 -6.9478E+00 7.9525E+00 -4.4991E+00 9.8274E-01 0.0000E+00 S2 9.0083E-01 2.7104E+00 -4.3116E+01 3.0039E+02 -1.1754E+03 2.6562E+03 -3.1744E+03 1.5288E+03 0.0000E+00 S3 -4.0045E-01 1.3044E+00 -3.7232E+01 2.9888E+02 -1.2414E+03 1.7687E+03 0.0000E+00 0.0000E+00 0.0000E+00 S4 -2.5768E-01 -1.0348E+01 1.6444E+02 -1.6028E+03 9.6746E+03 -3.6626E+04 8.4339E+04 -1.0786E+05 5.8564E+04 S5 2.0637E-01 6.8288E-01 -1.3568E+01 7.5084E+01 -2.3156E+02 4.2740E+02 -4.6858E+02 2.7989E+02 -6.9694E+01 S6 -6.6229E-01 6.6184E+00 -3.8350E+01 1.2902E+02 -2.6736E+02 3.4490E+02 -2.7093E+02 1.1869E+02 -2.2177E+01 S7 -1.4824E+00 4.5083E+00 -2.2865E+01 6.6190E+01 -1.1011E+02 1.0327E+02 -5.0455E+01 9.9459E+00 0.0000E+00 S8 -8.1060E-01 5.8821E-01 1.4579E-01 -8.6506E-01 9.3868E-01 -5.4309E-01 1.8676E-01 -3.6650E-02 3.1940E-03

[0103] 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 system. Figure 8B 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 surface after passing through the optical system. Figure 8C 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 8D The distortion curve of the optical imaging lens in this embodiment is shown, representing the distortion magnitude corresponding to different field of view angles. According to... Figures 8A to 8D It can be seen that the optical imaging lens provided in this embodiment can achieve good imaging quality.

[0104] Example 5

[0105] The following is for reference Figures 9 to 10D This describes an optical imaging lens according to Embodiment 5 of this application. (Refer to...) Figure 9 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, and a filter E5. An aperture stop STO (not shown) may be provided between the first lens E1 and the second lens E2. An air gap may be present between any two adjacent lenses.

[0106] The first lens E1 has negative optical power, with its object-side surface S1 being concave and its image-side surface S2 being concave. The second lens E2 has positive optical power, with its object-side surface S3 being convex and its image-side surface S4 being convex. The third lens E3 has 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 filter E5 has an object-side surface S9 and an image-side surface S10. The optical imaging lens of this embodiment has an imaging surface S11. Light from the object passes sequentially through each surface (S1 to S10) and is imaged on the imaging surface S11.

[0107] 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:

[0108] Table 9

[0109]

[0110]

[0111] Table 10

[0112] Face number A4 A6 A8 A10 A12 A14 A16 A18 A20 S1 7.6105E-01 -1.4465E+00 3.2159E+00 -6.4747E+00 1.0283E+01 -1.1513E+01 8.2680E+00 -3.3819E+00 5.9440E-01 S2 1.3598E+00 -8.1958E+00 1.0000E+02 -8.2401E+02 4.2794E+03 -1.3805E+04 2.6861E+04 -2.8785E+04 1.2973E+04 S3 -8.7647E-01 3.7612E+01 -1.3709E+03 2.8700E+04 -3.7020E+05 2.9725E+06 -1.4465E+07 3.9013E+07 -4.4721E+07 S4 -4.6580E-02 -2.2344E-01 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 S5 1.9933E-01 -2.0023E-01 -3.0523E+00 2.1470E+01 -7.2958E+01 1.4508E+02 -1.7225E+02 1.1302E+02 -3.1430E+01 S6 6.7295E-01 2.1172E-01 -1.3262E+01 7.0407E+01 -1.9181E+02 3.0832E+02 -2.9501E+02 1.5536E+02 -3.4614E+01 S7 -1.1126E+00 3.2100E+00 -2.0433E+01 8.0615E+01 -1.9022E+02 2.7504E+02 -2.4037E+02 1.1692E+02 -2.4304E+01 S8 -3.3316E-01 -2.0954E-01 1.5146E+00 -2.9251E+00 3.1431E+00 -2.0674E+00 8.2555E-01 -1.8348E-01 1.7381E-02

[0113] 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 system. Figure 10B 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 surface after passing through the optical system. Figure 10C 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 10D The distortion curve of the optical imaging lens in this embodiment is shown, representing the distortion magnitude corresponding to different field of view angles. According to... Figures 10A to 10D It can be seen that the optical imaging lens provided in this embodiment can achieve good imaging quality.

[0114] Example 6

[0115] The following is for reference Figures 11 to 12D This describes an optical imaging lens according to Embodiment 3 of this application. (Refer to...) Figure 11 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, and a filter E5. An aperture stop STO (not shown) may be provided between the first lens E1 and the second lens E2. An air gap may be present between any two adjacent lenses.

[0116] The first lens E1 has negative optical power, with its object-side surface S1 being concave and its image-side surface S2 being concave. The second lens E2 has positive optical power, with its object-side surface S3 being convex and its image-side surface S4 being convex. The third lens E3 has 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 filter E5 has an object-side surface S9 and an image-side surface S10. The optical imaging lens of this embodiment has an imaging surface S11. Light from the object passes sequentially through each surface (S1 to S10) and is imaged on the imaging surface S11.

[0117] 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:

[0118] Table 11

[0119]

[0120]

[0121] Table 12

[0122] Face number A4 A6 A8 A10 A12 A14 A16 A18 A20 S1 7.5182E-01 -1.3706E+00 2.9201E+00 -4.9991E+00 6.3416E+00 -5.5223E+00 3.0867E+00 -9.8229E-01 1.2626E-01 S2 1.1665E+00 -3.3413E+00 2.1986E+01 -1.2081E+02 4.7480E+02 -1.2314E+03 2.0135E+03 -1.8795E+03 7.5228E+02 S3 -2.3375E-01 -5.0148E+00 3.3382E+01 1.4166E+02 -2.5571E+03 7.0896E+03 0.0000E+00 0.0000E+00 0.0000E+00 S4 -3.2413E-01 -6.2712E+00 8.6527E+01 -7.6050E+02 4.1724E+03 -1.4450E+04 3.0562E+04 -3.5989E+04 1.8023E+04 S5 3.6267E-01 -1.5917E+00 1.8192E+00 1.3405E+01 -8.3560E+01 2.1880E+02 -3.1143E+02 2.3271E+02 -7.0795E+01 S6 4.7999E-01 -1.1855E+00 -2.5057E+00 3.2219E+01 -1.0836E+02 1.8656E+02 -1.8017E+02 9.2697E+01 -1.9656E+01 S7 -8.9463E-01 -1.0305E+00 2.7463E+00 3.9283E+00 -2.2236E+01 3.1532E+01 -1.9131E+01 4.3452E+00 0.0000E+00 S8 -1.4165E+00 2.3824E+00 -3.0347E+00 2.8181E+00 -1.8795E+00 8.6528E-01 -2.5578E-01 4.2900E-02 -3.0500E-03

[0123] Figure 12A 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 system. Figure 12B 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 surface after passing through the optical system. Figure 12C 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 12D The distortion curve of the optical imaging lens in this embodiment is shown, representing the distortion magnitude corresponding to different field of view angles. According to... Figures 12A to 12DIt can be seen that the optical imaging lens provided in this embodiment can achieve good imaging quality.

[0124] In summary, Examples 1 to 6 satisfy the relationships shown in Table 13 below.

[0125] Table 13

[0126] Conditional Implementation Examples 1 2 3 4 5 6 Semi-FOV (°) 61.5 70.0 55.0 60.0 65.6 57.6 f4 / f1 0.66 0.46 0.13 0.95 0.46 0.37 (f2+f3) / f 3.16 2.72 3.42 3.79 2.32 2.63 R4 / R6 1.85 1.53 2.26 0.29 1.48 1.34 R7 / R8 2.09 2.69 2.51 1.54 2.59 2.51 (CT2+CT3) / TTL×5 1.82 1.71 1.55 1.56 1.47 1.66 (T12+T23) / ImgH 0.45 0.46 0.44 0.50 0.53 0.48 (DT22+DT32) / DT42 1.16 1.10 1.12 1.11 1.11 1.16 (DT11+DT12) / ImgH 1.02 1.01 1.04 0.92 0.91 0.95 f2 / R2 1.70 0.50 0.25 0.19 0.53 0.39 V1 55.9 55.9 55.9 55.9 56.1 55.9 V2 55.9 56.1 56.1 56.1 56.1 56.1

[0127] 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 three lenses are described as an example in the embodiments, the optical imaging lens is not limited to including three lenses. If desired, the optical imaging lens may also include other numbers of lenses.

[0128] 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.

[0129] 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, In order from the object side to the image side along the optical axis, comprises: a first lens with negative refractive power, whose image side surface is concave; a second lens with positive refractive power, whose image side surface is convex; a third lens with positive refractive power, whose object side surface is convex and whose image side surface is convex; a fourth lens with negative refractive power, whose object side surface is convex and whose image side surface is concave; a central thickness CT2 of the second lens on the optical axis, a central thickness CT3 of the third lens on the optical axis, and a distance TTL from the object side surface of the first lens to an imaging surface of the optical imaging lens on the optical axis satisfy 1.47≤(CT2+CT3) / TTL×5≤1.82; a separation distance T12 of the first lens and the second lens on the optical axis, a separation distance T23 of the second lens and the third lens on the optical axis, and a half of a diagonal length ImgH of an effective pixel area on the imaging surface of the optical imaging lens satisfy 0.4<(T12+T23) / ImgH<0.55; an effective focal length f2 of the second lens, an effective focal length f3 of the third lens, and an effective focal length f of the optical imaging lens satisfy 2.3<(f2+f3) / f<3.8; the number of lenses with refractive power in the optical imaging lens is four. 2.The optical imaging lens according to claim 1, wherein, The optical imaging lens further comprises a diaphragm arranged between the first lens and the second lens. 3.The optical imaging lens according to claim 1, wherein, an effective half aperture radius DT22 of the image side surface of the second lens, an effective half aperture radius DT32 of the image side surface of the third lens, and an effective half aperture radius DT42 of the image side surface of the fourth lens satisfy 1.10≤(DT22+DT32) / DT42<1.

20. 4.The optical imaging lens according to claim 1, wherein, an effective half aperture radius DT11 of the object side surface of the first lens, an effective half aperture radius DT12 of the image side surface of the first lens, and a half of a diagonal length ImgH of an effective pixel area on the imaging surface of the optical imaging lens satisfy 0.9<(DT11+DT12) / ImgH≤1.

04.

5. The optical imaging lens according to claim 1, characterized in that, a maximum half field angle Semi-FOV of the optical imaging lens satisfies 55°≤Semi-FOV≤70°. 6.The optical imaging lens according to claim 1, wherein, an effective focal length f4 of the fourth lens and an effective focal length f1 of the first lens satisfy 0.1<f4 / f1≤0.

95. 7.The optical imaging lens according to claim 1, wherein, an effective focal length f2 of the second lens and a curvature radius R2 of the image side surface of the first lens satisfy 0.18<f2 / R2≤1.

70. 8.The optical imaging lens according to claim 1, wherein, a curvature radius R4 of the image side surface of the second lens and a curvature radius R6 of the image side surface of the third lens satisfy 0.29≤R4 / R6<2.

3. 9.The optical imaging lens according to claim 6, wherein, a curvature radius R7 of the object side surface of the fourth lens and a curvature radius R8 of the image side surface of the fourth lens satisfy 1.5<R7 / R8<2.

7. 10.The optical imaging lens according to claim 1, wherein, an Abbe number V1 of the first lens satisfies 55.9≤V1≤56.1, and an Abbe number V2 of the second lens satisfies 55.9≤V2≤56.1.

Images