Optical imaging lens

Abstract

The application discloses an optical imaging lens, which comprises, in sequence from the object side to the image side along the optical axis, a first lens, a second lens, a third lens and a fourth lens; wherein the first lens has positive refractive power, and the object side surface thereof is a convex surface; the second lens has negative refractive power, and the object side surface thereof is a concave surface; the third lens has refractive power; the fourth lens has negative refractive power, and the object side surface thereof is a concave surface; the total effective focal length f of the optical imaging lens, the distance TTL from the object side surface of the first lens to the imaging surface of the optical imaging lens on the optical axis, and the half of the diagonal line length of the effective pixel area on the imaging surface of the optical imaging lens ImgH satisfy 1.75mm < f*(ImgH / TTL) < 2.05mm; the maximum half field of view Semi-FOV of the optical imaging lens satisfies 22.53° ≤ Semi-FOV < 30°; the effective focal length f2 of the second lens and the total effective focal length f of the optical imaging lens satisfy -1.1 ≤ f2 / f < -0.3; and the total effective focal length f of the optical imaging lens and the effective focal length f4 of the fourth lens satisfy -1.04 ≤ f / f4 ≤ -0.63.

Description

[0001] Divisional application

[0002] This application is a divisional application of the China Invention Patent Application No. 201910463586.8, filed on May 30, 2019, entitled “Optical Imaging Lens”, which claims priority to the China Invention Patent Application No. 201910463586.8, filed on May 30, 2019, entitled “Optical Imaging Lens”. TECHNICAL FIELD

[0003] The present application relates to an optical imaging lens, in particular, to an optical imaging lens comprising four lenses. BACKGROUND

[0004] With the development of portable electronic products (such as smart phones, tablet computers, etc.) with photographing and video recording functions towards thin and light, the miniaturization of imaging lenses applied thereto is increasingly demanding. On the other hand, the commonly used imaging lens is generally a photosensitive coupling element (CCD, Charge-Coupled Device) or a complementary metal-oxide semiconductor element (CMOS, Complementary Metal-Oxide Semiconductor), and with the advancement of semiconductor process technology, the pixel is getting higher and higher, and the high imaging quality and miniaturization of the optical imaging lens are also put forward higher requirements. SUMMARY

[0005] The present application provides an optical imaging lens which can be applied to portable electronic products and can at least solve or partially solve at least one of the above-mentioned shortcomings in the prior art.

[0006] In one aspect, the present application provides an optical imaging lens, which comprises, in order from the object side to the image side along the optical axis, a first lens, a second lens, a third lens and a fourth lens; wherein the first lens has positive refractive power, and the object side surface thereof is convex; the second lens has negative refractive power, and the object side surface thereof is concave; the third lens has refractive power; the fourth lens has negative refractive power, and the object side surface thereof is concave; the total effective focal length f of the optical imaging lens, the distance TTL from the object side surface of the first lens to the imaging surface of the optical imaging lens on the optical axis, and half of the diagonal line length of the effective pixel area on the imaging surface of the optical imaging lens ImgH satisfy 1.75mm < f*(ImgH / TTL) < 2.05mm; the maximum half field angle Semi-FOV of the optical imaging lens satisfies 22.53° ≤ Semi-FOV < 30°; the effective focal length f2 of the second lens and the total effective focal length f of the optical imaging lens satisfy -1.1 ≤ f2 / f < -0.3; and the total effective focal length f of the optical imaging lens and the effective focal length f4 of the fourth lens satisfy -1.04 ≤ f / f4 ≤ -0.63.

[0007] In one embodiment, the radius of curvature R1 of the object side surface of the first lens and the radius of curvature R3 of the object side surface of the second lens can satisfy -0.8 < (R1+R3) / (R1-R3) < 0.

[0008] In one embodiment, the central thickness CT2 of the second lens on the optical axis and the central thickness CT4 of the fourth lens on the optical axis can satisfy 0.1 < CT2 / CT4 < 0.9.

[0009] In one embodiment, the effective focal length f1 of the first lens and the distance TTL of the object side surface of the first lens to the imaging surface of the optical imaging lens on the optical axis can satisfy 0.2 < f1 / TTL < 0.7.

[0010] In one embodiment, the on-axis distance SAG11 of the intersection of the object side surface of the first lens and the optical axis to the effective radius vertex of the object side surface of the first lens and the on-axis distance SAG22 of the intersection of the image side surface of the second lens and the optical axis to the effective radius vertex of the image side surface of the second lens can satisfy 0 < SAG22 / SAG11 < 0.4.

[0011] In one embodiment, the combined focal length f12 of the first lens and the second lens and the total effective focal length f of the optical imaging lens can satisfy 0.6 < f12 / f < 1.

[0012] In one embodiment, the maximum effective radius DT21 of the object side surface of the second lens and the maximum effective radius DT41 of the object side surface of the fourth lens can satisfy 0.4 < DT21 / DT41 < 1.

[0013] In one embodiment, the total effective focal length f of the optical imaging lens and the sum ∑AT of the interval distances of any two adjacent lenses among the first lens to the fourth lens on the optical axis can satisfy 2.3 < f / ∑AT < 4.

[0014] In one embodiment, the sum ∑CT of the central thicknesses of the first lens to the fourth lens on the optical axis and the distance TTL of the object side surface of the first lens to the imaging surface of the optical imaging lens on the optical axis can satisfy 0.2 < ∑CT / TTL < 0.6.

[0015] In one embodiment, 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 can satisfy 1.2 < T23 / T34 < 3.0.

[0016] The present application adopts four lenses, and by reasonably allocating the optical power, surface shape, central thickness of each lens, and on-axis interval distance between each lens, etc., the above optical imaging lens has at least one of the following beneficial effects: miniaturization, high imaging quality, low sensitivity, etc. BRIEF DESCRIPTION OF DRAWINGS

[0017] Other features, objects, and advantages of the application will become more apparent from the following detailed description of non-limiting embodiments when read in conjunction with the accompanying drawings. In the drawings:

[0018] Figure 1 A structure schematic view of the optical imaging lens according to Embodiment 1 of the application is shown;

[0019] Figures 2A to 2D Axial chromatic aberration curves, astigmatism curves, distortion curves, and lateral chromatic aberration curves of the optical imaging lens of Embodiment 1 are shown respectively;

[0020] Figure 3 A structure schematic view of the optical imaging lens according to Embodiment 2 of the application is shown;

[0021] Figures 4A to 4D Axial chromatic aberration curves, astigmatism curves, distortion curves, and lateral chromatic aberration curves of the optical imaging lens of Embodiment 2 are shown respectively;

[0022] Figure 5 A structure schematic view of the optical imaging lens according to Embodiment 3 of the application is shown;

[0023] Figures 6A to 6D Axial chromatic aberration curves, astigmatism curves, distortion curves, and lateral chromatic aberration curves of the optical imaging lens of Embodiment 3 are shown respectively;

[0024] Figure 7 A structure schematic view of the optical imaging lens according to Embodiment 4 of the application is shown;

[0025] Figures 8A to 8D Axial chromatic aberration curves, astigmatism curves, distortion curves, and lateral chromatic aberration curves of the optical imaging lens of Embodiment 4 are shown respectively;

[0026] Figure 9 A structure schematic view of the optical imaging lens according to Embodiment 5 of the application is shown;

[0027] Figures 10A to 10D Axial chromatic aberration curves, astigmatism curves, distortion curves, and lateral chromatic aberration curves of the optical imaging lens of Embodiment 5 are shown respectively;

[0028] Figure 11 A structure schematic view of the optical imaging lens according to Embodiment 6 of the application is shown;

[0029] Figures 12A to 12D Axial chromatic aberration curves, astigmatism curves, distortion curves, and lateral chromatic aberration curves of the optical imaging lens of Embodiment 6 are shown respectively;

[0030] Figure 13A structure diagram of an optical imaging lens according to Embodiment 7 of the present application is shown.

[0031] Figures 14A to 14D An on-axis chromatic aberration curve, an astigmatism curve, a distortion curve and a lateral chromatic aberration curve of the optical imaging lens of Embodiment 7 are shown respectively. DETAILED DESCRIPTION

[0032] For a better understanding of the present application, various aspects of the present application will be described in more detail below with reference to the accompanying drawings. It is to be noted that the detailed description is only a description of exemplary embodiments of the present application and is not intended in any way to limit the scope of the present application. Throughout the specification, like drawing reference numerals refer to like elements. The expression "and / or" includes any and all combinations of one or more of the associated listed items.

[0033] It should be noted that the expressions first, second, third and the like in this specification are used only to distinguish one feature from another feature, and do not denote any limitation on the features. Thus, the first lens discussed below can also be referred to as the second lens or the third lens without departing from the teachings of the present application.

[0034] In the drawings, the thickness, size, and shape of the lenses have been slightly exaggerated for the sake of explanation. Specifically, the shape of the spherical or aspherical surface shown in the drawings is shown by way of example. That is, the shape of the spherical or aspherical surface is not limited to the shape of the spherical or aspherical surface shown in the drawings. The drawings are merely examples and are not drawn to scale.

[0035] In this specification, the paraxial region refers to a region near the optical axis. If a lens surface is convex and the position of the convex surface is not specified, it means that the lens surface is convex at least in the paraxial region. If a lens surface is concave and the position of the concave surface is not specified, it means that the lens surface is concave at least in the paraxial region. The surface of each lens closer to the object is referred to as the object side surface of the lens, and the surface of each lens closer to the imaging plane is referred to as the image side surface of the lens.

[0036] It should also be understood that the words "comprise", "comprising", "include", "including", and / or "contain", when used in this specification, specify the presence of stated features, elements, and / or components, but do not preclude the presence or addition of one or more other features, elements, components, and / or groups thereof. In addition, when describing the embodiments of the present application, the use of "may" indicates that one or more embodiments of the present application. Also, the word "exemplary" is intended to mean an example or an illustration.

[0037] Unless otherwise defined, all terms (including technical and scientific terms) used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. It will be further understood that terms, such as those defined in commonly used dictionaries, should be interpreted as having a meaning that is consistent with their meaning in the context of the relevant art and will not be interpreted in an idealized or overly formal sense unless expressly so defined herein.

[0038] It should be noted that the embodiments and features of the embodiments in the present application can be combined with each other without conflict. The present application will be described in detail below with reference to the drawings and in conjunction with the embodiments.

[0039] The features, principles, and other aspects of the present application are described in detail below.

[0040] The optical imaging lens according to the exemplary embodiments of the present application can include, for example, four lenses with optical power, i.e., a first lens, a second lens, a third lens, and a fourth lens. The four lenses are arranged in order from an object side to an image side along an optical axis. In the first lens to the fourth lens, any two adjacent lenses can have an air gap therebetween.

[0041] In the exemplary embodiments, the first lens can have positive optical power; the second lens can have negative optical power, and the object side surface thereof can be a concave surface; the third lens can have positive optical power or negative optical power; and the fourth lens can have negative optical power, and the object side surface thereof can be a concave surface. By reasonably controlling the positive and negative distribution of the optical power of each component of the system and the amount of light entering, the low-order aberrations of the system are effectively balanced.

[0042] In the exemplary embodiments, the optical imaging lens of the present application can satisfy the condition formula f / f4≥-1.04, where f4 is the effective focal length of the fourth lens, and f is the total effective focal length of the optical imaging lens. More specifically, f and f4 can further satisfy -1.04≤f / f4≤-0.63. By controlling the optical power of the fourth lens, the change in direction of the light entering the system can be slowed down, thereby helping to reduce the intensity of stray light.

[0043] In the exemplary embodiments, the optical imaging lens of the present application can satisfy the condition formula 1.2

[0044] In exemplary embodiments, the optical imaging lens of the present application can satisfy the condition formula 1.75mm < f*(ImgH / TTL) < 2.05mm, where TTL is the distance from the object side of the first lens to the imaging plane of the optical imaging lens on the optical axis, ImgH is half of the diagonal length of the effective pixel area on the imaging plane of the optical imaging lens, and f is the total effective focal length of the optical imaging lens. More specifically, f, ImgH and TTL can further satisfy 1.82mm ≤ f*(ImgH / TTL) ≤ 1.98mm. By reasonably controlling the ratio of the image height of the imaging lens to the total optical length, the total size of the imaging lens can be effectively compressed to achieve a shorter length of the imaging lens, so that the imaging lens can be better applied to a system with limited size.

[0045] In exemplary embodiments, the optical imaging lens of the present application can satisfy the condition formula -1.1 ≤ f2 / f < -0.3, where f is the total effective focal length of the optical imaging lens, and f2 is the effective focal length of the second lens. More specifically, f2 and f can further satisfy -1.10 ≤ f2 / f ≤ -0.59. Controlling the focal power of the second lens within a reasonable range can increase the overall focal length of the lens, while effectively balancing the field curvature.

[0046] In exemplary embodiments, the optical imaging lens of the present application can satisfy the condition formula -0.8 < (R1+R3) / (R1-R3) < 0, where R3 is the radius of curvature of the object side of the second lens, and R1 is the radius of curvature of the object side of the first lens. More specifically, R1 and R3 can further satisfy -0.60 ≤ (R1+R3) / (R1-R3) ≤ -0.10. By controlling the radius of curvature of the object side of the first lens and the radius of curvature of the object side of the second lens to satisfy -0.8 < (R1+R3) / (R1-R3) < 0, the optical system can have a larger aperture, which is beneficial to improve the overall brightness of imaging. Optionally, the object side of the first lens can be convex.

[0047] In exemplary embodiments, the optical imaging lens of the present application can satisfy the condition formula 0.1 < CT2 / CT4 < 0.9, where CT2 is the center thickness of the second lens on the optical axis, and CT4 is the center thickness of the fourth lens on the optical axis. More specifically, CT2 and CT4 can further satisfy 0.31 ≤ CT2 / CT4 ≤ 0.71. Reasonably controlling the center thickness of the second lens on the optical axis and the center thickness of the fourth lens on the optical axis can help to control the uniform distribution of lens size, ensure the stability of assembly, and help to reduce the aberration of the entire optical imaging lens and shorten the total length of the optical imaging lens.

[0048] In exemplary embodiments, the optical imaging lens of the present application can satisfy the condition formula 0.2 < f1 / TTL < 0.7, where TTL is the distance on the optical axis from the object side of the first lens to the imaging surface of the optical imaging lens, and f1 is the effective focal length of the first lens. More specifically, f1 and TTL can further satisfy 0.41 ≤ f1 / TTL ≤ 0.54. By effectively controlling the effective focal length f1 of the first lens and the axial distance TTL from the object side of the first lens to the imaging surface to satisfy 0.2 < f1 / TTL < 0.7, the focal length and thickness of the first lens can be reasonably balanced, thereby facilitating effective correction of system aberration while ensuring process workability.

[0049] In exemplary embodiments, the optical imaging lens of the present application can satisfy the condition formula 0 < SAG22 / SAG11 < 0.4, where SAG11 is the axial distance from the intersection of the optical axis and the object side of the first lens to the effective radius vertex of the object side of the first lens, and SAG22 is the axial distance from the intersection of the optical axis and the image side of the second lens to the effective radius vertex of the image side of the second lens. More specifically, SAG22 and SAG11 can further satisfy 0.10 ≤ SAG22 / SAG11 ≤ 0.30, for example, 0.13 ≤ SAG22 / SAG11 ≤ 0.23. By reasonably controlling the ratio of SAG22 to SAG11, the refractive power of each lens can be uniformly distributed, thereby facilitating the configuration of a small viewing angle.

[0050] In exemplary embodiments, the optical imaging lens of the present application can satisfy the condition formula 0.6 < f12 / f < 1, where f is the total effective focal length of the optical imaging lens, and f12 is the combined focal length of the first lens and the second lens. More specifically, f12 and f can further satisfy 0.75 ≤ f12 / f ≤ 0.90, for example, 0.80 ≤ f12 / f ≤ 0.87. By reasonably controlling the ratio of the combined focal length f12 of the first lens and the second lens to the total effective focal length f of the optical imaging lens to satisfy 0.6 < f12 / f < 1, the distortion of the image surface in the near-axis range can be effectively corrected, thereby improving the imaging quality of the lens.

[0051] In exemplary embodiments, the optical imaging lens of the present application can satisfy the condition formula 2.3 < f / ∑AT < 4, where f is the total effective focal length of the optical imaging lens, and ∑AT is the sum of the separation distances on the optical axis of any two adjacent lenses among the first to fourth lenses. More specifically, f and ∑AT can further satisfy 2.69 ≤ f / ∑AT ≤ 3.67. By reasonably controlling the ratio of the effective focal length of the optical imaging lens to the sum of the air separation distances on the optical axis of any two adjacent lenses, the lens size can be uniformly distributed, the assembly stability can be ensured, and the aberration of the entire optical imaging lens can be reduced.

[0052] In exemplary embodiments, the optical imaging lens of the present application can satisfy the condition Semi-FOV < 30°, wherein Semi-FOV is the maximum half field of view of the optical imaging lens. More specifically, Semi-FOV can further satisfy Semi-FOV < 26°, for example, 22.53° ≤ Semi-FOV ≤ 24.98°. By controlling the field of view of the imaging lens, the imaging range of the system can be effectively controlled.

[0053] In exemplary embodiments, the optical imaging lens of the present application can satisfy the condition 0.2 < ∑CT / TTL < 0.6, wherein TTL is the distance from the object side of the first lens to the imaging surface of the optical imaging lens on the optical axis, and ∑CT is the sum of the central thicknesses of the first lens to the fourth lens on the optical axis. More specifically, ∑CT and TTL can further satisfy 0.40 ≤ ∑CT / TTL ≤ 0.54. By reasonably controlling the central thicknesses of the first lens to the fourth lens, the space utilization can be improved, the lens processing and assembly difficulty can be reduced, and the imaging lens can be better applied to systems with limited size.

[0054] In exemplary embodiments, the optical imaging lens of the present application can satisfy the condition 0.4 < DT21 / DT41 < 1, wherein DT21 is the maximum effective half radius of the object side of the second lens, and DT41 is the maximum effective half radius of the object side of the fourth lens. More specifically, DT21 and DT41 can further satisfy 0.63 ≤ DT21 / DT41 ≤ 0.87. By reasonably controlling the ratio of the maximum effective half radius DT21 of the object side of the second lens to the maximum effective half radius DT41 of the object side of the fourth lens, so that they satisfy 0.4 < DT21 / DT41 < 1, the incident light entering and exiting the optical system can be controlled, and the lens can have better distortion correction capability.

[0055] In exemplary embodiments, the optical imaging lens described above can further include a diaphragm. The diaphragm can be disposed at a suitable position as needed, for example, between the second lens and the third lens. Optionally, the optical imaging lens described above can further include a filter for correcting color deviation and / or a protective glass for protecting the photosensitive element located on the imaging surface.

[0056] The optical imaging lens according to the above embodiments of the present application can adopt multiple lenses, for example, four lenses as described above. By reasonably allocating the optical power, surface type, central thickness of each lens, and axial distance between each lens, etc., the volume of the imaging lens can be effectively reduced, the sensitivity of the imaging lens can be reduced, and the processability of the imaging lens can be improved, so that the optical imaging lens is more conducive to production and processing and can be applied to portable electronic products. The four-lens imaging lens provided by the present application can be applied to portable electronic products and has good imaging quality and low sensitivity.

[0057] In embodiments of the present application, at least one of the object side surface to the image side surface of the first lens to the fourth lens is an aspheric surface. An aspheric lens is characterized by a continuously varying curvature from the center of the lens to the periphery of the lens. Unlike a spherical lens having a constant curvature from the center of the lens to the periphery of the lens, an aspheric lens has a better radius of curvature characteristic, which has the advantage of improving distortion aberration and improving astigmatism aberration. By using an aspheric lens, aberration that occurs during imaging can be eliminated as much as possible, thereby improving the imaging quality. Optionally, at least one of the object side surface and the image side surface of each of the first lens, the second lens, the third lens and the fourth lens is an aspheric surface. Optionally, 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 are aspheric surfaces.

[0058] However, those skilled in the art will understand that the number of lenses constituting the optical imaging lens can be changed without departing from the technical solutions claimed by the present application to obtain the various results and advantages described in the present specification. For example, although described in embodiments by way of example with four lenses, the optical imaging lens is not limited to including four lenses. If necessary, the optical imaging lens can also include other numbers of lenses.

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

[0060] Example 1

[0061] The following refers to Figures 1 to 2D An optical imaging lens according to Embodiment 1 of the present application is described. Figure 1 A structural schematic diagram of the optical imaging lens according to Embodiment 1 of the present application is shown.

[0062] As Figure 1 shown, the optical imaging lens includes, in order from the object side to the image side along the optical axis, a first lens E1, a second lens E2, a stop STO, a third lens E3, a fourth lens E4, a filter E5 and an imaging surface S11.

[0063] The first lens E1 has positive refractive power, the object side surface S1 is a convex surface, and the image side surface S2 is a convex surface. The second lens E2 has negative refractive power, the object side surface S3 is a concave surface, and the image side surface S4 is a concave surface. The third lens E3 has positive refractive power, the object side surface S5 is a concave surface, and the image side surface S6 is a convex surface. The fourth lens E4 has negative refractive power, the object side surface S7 is a concave surface, and the image side surface S8 is a concave surface. The filter E5 has an object side surface S9 and an image side surface S10. Light from an object passes through each surface S1 to S10 in order and is finally imaged on the imaging surface S11.

[0064] Table 1 shows the basic parameter table of the optical imaging lens of Example 1, wherein the units of the radius of curvature, the thickness and the focal length are all millimeters (mm).

[0065]

[0066] Table 1

[0067] In this embodiment, the total effective focal length of the optical imaging lens f = 4.10 mm, the total length of the optical imaging lens (the distance from the object side surface of the first lens to the imaging surface on the optical axis) TTL = 3.95 mm, the half of the diagonal length of the effective pixel area on the imaging surface of the optical imaging lens ImgH = 1.75 mm, the maximum half field angle of the optical imaging lens Semi-FOV = 22.53°, and the F-number of the optical imaging lens Fno = 2.43.

[0068] In Example 1, the object side surface and the image side surface of any one of the first lens E1 to the fourth lens E4 are aspherical surfaces, and the surface type x of each aspherical surface can be defined by, but not limited to, the following aspherical surface formula:

[0069]

[0070] wherein x is the sag of the aspherical surface at a height 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 inverse of the radius of curvature R in Table 1 above), k is the conic coefficient, and Ai is the correction coefficient of the i-th order of the aspherical surface. Table 2 below shows the high-order coefficient A4, A6, A8, A10 and A12 of each aspherical surface S1-S8 that can be used in Example 1. 10 , A 12 , A 14 , A 16 , A 18 , and A 20 .

[0071] Face number A4 A6 A8 A10 A12 A14 A16 A18 A20 S1 2.2905E-02 -3.2234E-01 2.1066E+00 -8.3544E+00 2.0465E+01 -3.1624E+01 2.9961E+01 -1.5975E+01 3.6607E+00 S2 -1.4930E-01 1.3332E+00 -9.2702E+00 4.5603E+01 -1.4591E+02 2.9671E+02 -3.7124E+02 2.6048E+02 -7.8320E+01 S3 5.1602E-03 1.0643E+00 -4.9560E+00 1.5802E+01 -3.0767E+01 3.2072E+01 -1.3469E+01 0.0000E+00 0.0000E+00 S4 9.1949E-02 1.7878E+00 -1.6805E+01 9.6432E+01 -3.2206E+02 5.7327E+02 -4.2590E+02 0.0000E+00 0.0000E+00 S5 -2.1856E-01 -2.5074E-01 3.1968E+00 -1.7645E+01 5.3605E+01 -8.1374E+01 5.1484E+01 4.2607E+00 -1.4599E+01 S6 -2.6089E-01 3.7890E-01 -1.5935E+00 6.1345E+00 -1.5326E+01 2.5877E+01 -2.3756E+01 9.6468E+00 -1.0722E+00 S7 -6.9453E-01 1.0124E+00 -3.6893E+00 1.1381E+01 -2.5073E+01 3.5087E+01 -2.8072E+01 1.1678E+01 -1.9649E+00 S8 -4.5958E-01 7.0340E-01 -1.8884E+00 3.7815E+00 -5.0319E+00 4.2631E+00 -2.1844E+00 6.1401E-01 -7.2444E-02

[0072] Table 2

[0073] Figure 2A The axial chromatic aberration curve of the optical imaging lens of Example 1 is shown, which represents the deviation of the convergent focal points of light rays of different wavelengths after passing through the lens. Figure 2B The astigmatism curve of the optical imaging lens of Example 1 is shown, which represents the meridional image surface curvature and sagittal image surface curvature. Figure 2C The distortion curve of the optical imaging lens of Example 1 is shown, which represents the distortion size values corresponding to different field angles. Figure 2D The lateral chromatic aberration curve of the optical imaging lens of Example 1 is shown, which represents the deviation of the image height of light rays on the imaging surface after passing through the lens. According to the formula:Figures 2A to 2D It can be known that the optical imaging lens provided in Embodiment 1 can achieve good imaging quality.

[0074] Example 2

[0075] The optical imaging lens according to Embodiment 2 of the present application is described below. Figures 3 to 4D The structure schematic diagram of the optical imaging lens according to Embodiment 2 of the present application is shown. Figure 3 The structure schematic diagram of the optical imaging lens according to Embodiment 2 of the present application is shown.

[0076] As shown in Figure 3 the optical imaging lens sequentially comprises, along the optical axis from the object side to the image side, a first lens E1, a second lens E2, a stop STO, a third lens E3, a fourth lens E4, a filter E5 and an imaging surface S11.

[0077] The first lens E1 has positive refractive power, the object side surface S1 is a convex surface, and the image side surface S2 is a convex surface. The second lens E2 has negative refractive power, the object side surface S3 is a concave surface, and the image side surface S4 is a concave surface. The third lens E3 has negative refractive power, the object side surface S5 is a concave surface, and the image side surface S6 is a convex surface. The fourth lens E4 has negative refractive power, the object side surface S7 is a concave surface, and the image side surface S8 is a concave surface. The filter E5 has an object side surface S9 and an image side surface S10. Light from the object sequentially passes through each surface S1 to S10 and is finally imaged on the imaging surface S11.

[0078] In this embodiment, the total effective focal length of the optical imaging lens f = 4.15 mm, the total length TTL = 3.92 mm, the half diagonal length of the effective pixel area on the imaging surface ImgH = 1.87 mm, the maximum half field of view Semi-FOV = 23.55°, and the aperture number Fno = 2.44.

[0079] Table 3 shows the basic parameter table of the optical imaging lens of Embodiment 2, wherein the units of the curvature radius, the thickness and the focal length are all millimeters (mm). Table 4 shows the high-order term coefficients of the aspherical surface that can be used in each aspherical surface in Embodiment 2, wherein each aspherical surface type can be defined by the formula (1) given in Embodiment 1 above.

[0080]

[0081] Table 3

[0082]

[0083]

[0084] Table 4

[0085] Figure 4AThe on-axis chromatic aberration curve of the optical imaging lens of Embodiment 2 is shown, which represents the deviation of convergent focal points of light rays of different wavelengths after passing through the lens. Figure 4B The astigmatism curve of the optical imaging lens of Embodiment 2 is shown, which represents the meridional image curvature and sagittal image curvature. Figure 4C The distortion curve of the optical imaging lens of Embodiment 2 is shown, which represents the distortion size values corresponding to different field angles of view. Figure 4D The magnification chromatic aberration curve of the optical imaging lens of Embodiment 2 is shown, which represents the deviation of different image heights of light rays on the imaging plane after passing through the lens. According to the formula (2), the magnification chromatic aberration curve of the optical imaging lens of Embodiment 2 is shown. Figures 4A to 4D It can be seen that the optical imaging lens given in Embodiment 2 can achieve good imaging quality.

[0086] Example 3

[0087] The following refers to Figures 5 to 6D An optical imaging lens according to Embodiment 3 of the present application is described. Figure 5 A structural schematic diagram of the optical imaging lens according to Embodiment 3 of the present application is shown.

[0088] As shown in Figure 5 the optical imaging lens sequentially includes, along the optical axis from the object side to the image side, a first lens E1, a second lens E2, a stop STO, a third lens E3, a fourth lens E4, a filter E5, and an imaging surface S11.

[0089] The first lens E1 has positive refractive power, the object side surface S1 is a convex surface, and the image side surface S2 is a convex surface. The second lens E2 has negative refractive power, the object side surface S3 is a concave surface, and the image side surface S4 is a concave surface. The third lens E3 has positive refractive power, the object side surface S5 is a convex surface, and the image side surface S6 is a concave surface. The fourth lens E4 has negative refractive power, the object side surface S7 is a concave surface, and the image side surface S8 is a concave surface. The filter E5 has an object side surface S9 and an image side surface S10. Light from an object sequentially passes through each surface S1 to S10 and is finally imaged on the imaging surface S11.

[0090] In this embodiment, the total effective focal length of the optical imaging lens is f = 4.02 mm, the total length TTL = 3.98 mm, the half diagonal length of the effective pixel area on the imaging surface ImgH = 1.87 mm, the maximum half field angle Semi-FOV = 24.31°, and the aperture number Fno = 2.42.

[0091] Table 5 shows the basic parameter table of the optical imaging lens of Embodiment 3, wherein the units of the curvature radius, the thickness, and the focal length are all millimeters (mm). Table 6 shows the high-order term coefficients of the aspherical surfaces that can be used in the optical imaging lens of Embodiment 3, wherein each aspherical surface can be defined by the formula (1) given in Embodiment 1.

[0092]

[0093] Table 5

[0094] Face number A4 A6 A8 A10 A12 A14 A16 A18 A20 S1 -9.3476E-03 3.8244E-02 -3.1447E-01 1.0416E+00 -2.2629E+00 2.9690E+00 -2.3279E+00 9.2615E-01 -1.2761E-01 S2 4.1258E-02 -4.9781E-02 6.8580E-01 -4.2549E+00 1.2974E+01 -2.3445E+01 2.5160E+01 -1.4725E+01 3.6081E+00 S3 2.5467E-01 -2.2817E-01 4.7322E-01 -1.2680E+00 2.6729E+00 -3.0763E+00 1.5874E+00 0.0000E+00 0.0000E+00 S4 4.4309E-01 -8.4968E-01 1.0853E+00 8.4217E+00 -5.6633E+01 1.3796E+02 -1.2703E+02 0.0000E+00 0.0000E+00 S5 -2.7650E-01 6.5766E-01 -3.9317E+00 1.6673E+01 -4.9224E+01 9.3089E+01 -1.0747E+02 7.0510E+01 -2.0526E+01 S6 -4.2362E-01 5.4775E-01 -3.0995E-01 -5.1976E+00 2.3295E+01 -4.9327E+01 5.7611E+01 -3.4657E+01 8.2969E+00 S7 -7.3186E-01 8.8211E-01 -2.5243E+00 7.1891E+00 -1.4953E+01 1.9978E+01 -1.5183E+01 5.9735E+00 -9.5731E-01 S8 -3.2603E-01 1.8189E-01 -1.8816E-02 -1.7973E-01 3.0457E-01 -2.6558E-01 1.3892E-01 -4.1609E-02 5.4253E-03

[0095] Table 6

[0096] Figure 6A The axial chromatic aberration curve of the optical imaging lens of Embodiment 3 is shown, which represents the deviation of light rays of different wavelengths after passing through the lens. Figure 6B The astigmatism curve of the optical imaging lens of Embodiment 3 is shown, which represents the meridional image curvature and sagittal image curvature. Figure 6C The distortion curve of the optical imaging lens of Embodiment 3 is shown, which represents the distortion size values corresponding to different field angles of view. Figure 6D The lateral chromatic aberration curve of the optical imaging lens of Embodiment 3 is shown, which represents the deviation of light rays on the imaging plane after passing through the lens. According to Figures 6A to 6D It can be seen that the optical imaging lens given in Embodiment 3 can achieve good imaging quality.

[0097] Example 4

[0098] The following refers to Figures 7 to 8D An optical imaging lens according to Embodiment 4 of the present application is described. Figure 7 The structural schematic diagram of the optical imaging lens according to Embodiment 4 of the present application is shown.

[0099] As Figure 7 shown, the optical imaging lens sequentially includes, along the optical axis from the object side to the image side: a first lens E1, a second lens E2, a stop STO, a third lens E3, a fourth lens E4, a filter E5, and an imaging surface S11.

[0100] The first lens E1 has positive refractive power, the object side surface S1 is a convex surface, and the image side surface S2 is a convex surface. The second lens E2 has negative refractive power, the object side surface S3 is a concave surface, and the image side surface S4 is a concave surface. The third lens E3 has negative refractive power, the object side surface S5 is a concave surface, and the image side surface S6 is a concave surface. The fourth lens E4 has negative refractive power, the object side surface S7 is a concave surface, and the image side surface S8 is a concave surface. The filter E5 has an object side surface S9 and an image side surface S10. Light from the object sequentially passes through each surface S1 to S10 and is finally imaged on the imaging surface S11.

[0101] In this embodiment, the total effective focal length of the optical imaging lens f = 4.05 mm, the total length TTL = 4.10 mm, the half diagonal length of the effective pixel area on the imaging surface ImgH = 1.87 mm, the maximum half field angle Semi-FOV = 24.60°, and the aperture number Fno = 2.20.

[0102] Table 7 shows the basic parameters of the optical imaging lens of Example 4, wherein the units of the radius of curvature, the thickness and the focal length are millimeter (mm). Table 8 shows the high order term coefficients of each aspherical surface in Example 4, wherein each aspherical surface can be defined by the formula (1) given in Example 1 above.

[0103]

[0104]

[0105] Table 7

[0106] Face number A4 A6 A8 A10 A12 A14 A16 A18 A20 S1 -7.3720E-03 1.0985E-02 -2.0618E-01 9.0404E-01 -2.4634E+00 3.8834E+00 -3.5989E+00 1.7790E+00 -3.6040E-01 S2 1.8123E-02 2.8671E-01 -1.7380E+00 5.6806E+00 -1.2107E+01 1.6755E+01 -1.4582E+01 7.2709E+00 -1.5859E+00 S3 2.8558E-01 -4.0283E-01 4.9102E-01 4.9283E-01 -2.2903E+00 2.8204E+00 -1.1828E+00 0.0000E+00 0.0000E+00 S4 3.3972E-01 -4.4930E-01 -1.1882E+00 1.4676E+01 -5.2553E+01 8.8022E+01 -5.8407E+01 0.0000E+00 0.0000E+00 S5 -2.8468E-01 1.3780E-01 -2.9950E-01 4.4482E-01 -5.2144E+00 2.4132E+01 -4.5411E+01 4.0147E+01 -1.4345E+01 S6 -4.3420E-01 5.5454E-01 -1.7279E+00 4.5032E+00 -7.8384E+00 8.0787E+00 -2.3054E+00 -2.3142E+00 1.3243E+00 S7 -4.9114E-01 2.9217E-01 -1.0971E+00 4.2251E+00 -1.1127E+01 1.8504E+01 -1.7330E+01 8.3784E+00 -1.6412E+00 S8 -2.9480E-02 -3.5951E-01 7.4183E-01 -9.2533E-01 7.4735E-01 -3.8688E-01 1.2390E-01 -2.2402E-02 1.7451E-03

[0107] Table 8

[0108] Figure 8A The on-axis chromatic aberration curve of the optical imaging lens of Example 4 is shown, which represents the deviation of convergent focal points of light rays of different wavelengths after passing through the lens. Figure 8B The astigmatism curve of the optical imaging lens of Example 4 is shown, which represents the meridional image surface curvature and sagittal image surface curvature. Figure 8C The distortion curve of the optical imaging lens of Example 4 is shown, which represents the distortion size values corresponding to different field angles. Figure 8D The lateral chromatic aberration curve of the optical imaging lens of Example 4 is shown, which represents the deviation of different image heights of light rays on the imaging surface after passing through the lens. According to the formula (2) given above, the lateral chromatic aberration curve of the optical imaging lens of Example 4 is shown in Table 9. Figures 8A to 8D It can be seen that the optical imaging lens given in Example 4 can achieve good imaging quality.

[0109] Example 5

[0110] The following refers to Figures 9 to 10D The optical imaging lens according to Example 5 of the present application is described. Figure 9 The structure schematic diagram of the optical imaging lens according to Example 5 of the present application is shown.

[0111] As Figure 9 shown, the optical imaging lens sequentially includes, along the optical axis from the object side to the image side: a first lens E1, a second lens E2, a stop STO, a third lens E3, a fourth lens E4, a filter E5 and an imaging surface S11.

[0112] The first lens E1 has positive optical power, with its object-side surface S1 being convex and its image-side surface S2 being convex. The second lens E2 has negative optical power, with its object-side surface S3 being concave 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 convex. The filter E5 has an object-side surface S9 and an image-side surface S10. Light from the object sequentially passes through each of the surfaces S1 to S10 and is ultimately imaged on the imaging surface S11.

[0113] In this embodiment, the total effective focal length f of the optical imaging lens is 4.11 mm, the total length TTL is 4.10 mm, half the diagonal length of the effective pixel area on the imaging plane ImgH is 1.87 mm, the maximum half field of view Semi-FOV is 24.11°, and the aperture number Fno is 2.30.

[0114] Table 9 shows the basic parameters of the optical imaging lens of Example 5, where the units of curvature radius, thickness, and focal length are all in millimeters (mm). Table 10 shows the high-order coefficients of each aspherical mirror surface that can be used in Example 5, where the surface shape of each aspherical surface can be defined by formula (1) given in Example 1 above.

[0115]

[0116]

[0117] Table 9

[0118] Face number A4 A6 A8 A10 A12 A14 A16 A18 A20 S1 -9.2347E-03 1.5680E-02 -1.9526E-01 7.2449E-01 -1.7281E+00 2.4779E+00 -2.1446E+00 9.9296E-01 -1.8550E-01 S2 7.1826E-03 3.9429E-01 -2.0248E+00 5.3361E+00 -8.6209E+00 7.9763E+00 -3.2000E+00 -3.8779E-01 5.2466E-01 S3 2.9190E-01 -4.1746E-01 2.4719E-01 1.0720E+00 -3.2912E+00 4.0728E+00 -1.8731E+00 0.0000E+00 0.0000E+00 S4 5.0027E-01 -1.3927E+00 3.6021E+00 -3.7692E+00 -9.3000E+00 3.3515E+01 -2.9574E+01 0.0000E+00 0.0000E+00 S5 -1.6674E-01 8.4320E-02 -2.3474E+00 8.1184E+00 -5.1043E+00 -7.2586E+01 2.6520E+02 -3.8121E+02 1.9674E+02 S6 -9.2493E-02 -4.4707E-01 3.1709E+00 -1.7844E+01 6.0183E+01 -1.2636E+02 1.6096E+02 -1.1403E+02 3.4426E+01 S7 -1.7636E-01 -1.6955E-01 9.7259E-01 -6.1817E+00 2.3789E+01 -5.7537E+01 8.2015E+01 -6.3169E+01 2.0299E+01 S8 -1.5346E-01 5.6796E-03 2.3867E-01 -7.0652E-01 1.0140E+00 -8.4050E-01 4.0929E-01 -1.0880E-01 1.2201E-02

[0119] Table 10

[0120] Figure 10A The axial chromatic aberration curve of the optical imaging lens of Example 5 is shown, which indicates the deviation of the focal point of light of different wavelengths passing through the lens. Figure 10B The astigmatism curve of the optical imaging lens of Example 5 is shown, which represents the meridional field curvature and the sagittal field curvature. Figure 10C The distortion curve of the optical imaging lens of Example 5 is shown, which represents the distortion magnitude values ​​corresponding to different field angles. Figure 10D The chromatic aberration curve of the optical imaging lens of Example 5 is shown, which represents the deviation of different image heights on the imaging surface after the light passes through the lens. Figures 10A to 10D It can be seen that the optical imaging lens provided in Example 5 can achieve good imaging quality.

[0121] Example 6

[0122] The following reference Figures 11 to 12DAn optical imaging lens according to Embodiment 6 of the present application is described. Figure 11 A structural diagram of the optical imaging lens according to Embodiment 6 of the present application is shown.

[0123] As shown in Figure 11 the optical imaging lens includes, in order from the object side to the image side along the optical axis, a first lens E1, a second lens E2, a stop STO, a third lens E3, a fourth lens E4, a filter E5, and an imaging surface S11.

[0124] The first lens E1 has positive refractive power, the object side surface S1 is a convex surface, and the image side surface S2 is a concave surface. The second lens E2 has negative refractive power, the object side surface S3 is a concave surface, and the image side surface S4 is a concave surface. The third lens E3 has positive refractive power, the object side surface S5 is a concave surface, and the image side surface S6 is a convex surface. The fourth lens E4 has negative refractive power, the object side surface S7 is a concave surface, and the image side surface S8 is a concave surface. The filter E5 has an object side surface S9 and an image side surface S10. Light from an object passes through the surfaces S1 to S10 in order and is finally imaged on the imaging surface S11.

[0125] In this embodiment, the total effective focal length of the optical imaging lens is f = 4.00 mm, the total track length is TTL = 4.10 mm, the half of the diagonal length of the effective pixel area on the imaging surface is ImgH = 1.87 mm, the maximum half field of view is Semi-FOV = 24.98°, and the F-number is Fno = 2.30.

[0126] Table 11 shows the basic parameter table of the optical imaging lens of Embodiment 6, wherein the units of the curvature radius, the thickness, and the focal length are millimeters (mm). Table 12 shows the high-order term coefficients of the aspheric surfaces that can be used in the optical imaging lens of Embodiment 6, wherein each aspheric surface can be defined by the formula (1) given in Embodiment 1 above.

[0127]

[0128]

[0129] Table 11

[0130] Face number A4 A6 A8 A10 A12 A14 A16 A18 A20 S1 -1.2966E-03 6.6122E-03 -4.1063E-02 2.7122E-02 2.3670E-01 -8.2951E-01 1.1523E+00 -7.7776E-01 1.9690E-01 S2 2.0995E-02 -1.6286E-01 7.8097E-01 -2.7613E+00 5.9633E+00 -8.4242E+00 7.7118E+00 -4.1333E+00 9.6754E-01 S3 1.9317E-01 -2.4414E-01 6.2690E-01 -1.3453E+00 1.5516E+00 -4.0365E-01 -2.7725E-01 0.0000E+00 0.0000E+00 S4 2.5358E-01 -1.1839E-01 -7.2519E-02 4.8390E+00 -2.4860E+01 5.6185E+01 -4.6317E+01 0.0000E+00 0.0000E+00 S5 -1.5656E-01 3.7398E-01 -5.1562E+00 3.2233E+01 -1.2795E+02 3.1987E+02 -4.9091E+02 4.2040E+02 -1.5254E+02 S6 -9.6337E-02 -1.4318E-01 9.8160E-01 -4.3538E+00 1.1533E+01 -1.8870E+01 1.8754E+01 -1.0420E+01 2.5120E+00 S7 -3.9732E-01 8.0692E-01 -4.4509E+00 1.4640E+01 -2.9248E+01 3.5828E+01 -2.6326E+01 1.0642E+01 -1.8112E+00 S8 4.9880E-02 -6.1588E-01 1.2810E+00 -1.7418E+00 1.5948E+00 -9.7565E-01 3.8159E-01 -8.6017E-02 8.4790E-03

[0131] Table 12

[0132] Figure 12A The on-axis chromatic aberration curve of the optical imaging lens of Embodiment 6 is shown, which represents the deviation of the convergent focal points of light rays of different wavelengths after passing through the lens. Figure 12B The astigmatism curve of the optical imaging lens of Embodiment 6 is shown, which represents the meridional image surface curvature and sagittal image surface curvature. Figure 12C The distortion curve of the optical imaging lens of Embodiment 6 is shown, which represents the distortion size values corresponding to different field angles.Figure 12D The chromatic aberration curve of the optical imaging lens of Example 6 is shown, which represents the deviation of different image heights on the imaging surface after the light passes through the lens. Figures 12A to 12D It can be seen that the optical imaging lens provided in Example 6 can achieve good imaging quality.

[0133] Example 7

[0134] The following reference Figures 13 to 14D An optical imaging lens according to Example 7 of the present application is described. Figure 13 A schematic structural diagram of an optical imaging lens according to Example 7 of the present application is shown.

[0135] like Figure 13 As shown, the optical imaging lens comprises, in order from the object side to the image side along the optical axis: a first lens E1, a second lens E2, an aperture STO, a third lens E3, a fourth lens E4, a filter E5 and an imaging surface S11.

[0136] The first lens E1 has positive optical power, with its object-side surface S1 being convex and its image-side surface S2 being convex. The second lens E2 has negative optical power, with its object-side surface S3 being concave and its image-side surface S4 being convex. The third lens E3 has negative optical power, with its object-side surface S5 being concave and its image-side surface S6 being concave. The fourth lens E4 has negative optical power, with its object-side surface S7 being concave and its image-side surface S8 being concave. The filter E5 has an object-side surface S9 and an image-side surface S10. Light from the object sequentially passes through each of the surfaces S1 to S10 and is ultimately imaged on the imaging surface S11.

[0137] In this embodiment, the total effective focal length f of the optical imaging lens is 4.00 mm, the total length TTL is 4.10 mm, half the diagonal length of the effective pixel area on the imaging plane is ImgH is 1.87 mm, the maximum half field of view angle Semi-FOV is 24.72°, and the aperture number Fno is 2.17.

[0138] Table 13 shows the basic parameters of the optical imaging lens of Example 7, where the units of curvature radius, thickness, and focal length are all in millimeters (mm). Table 14 shows the high-order coefficients of each aspherical mirror surface that can be used in Example 7, where the surface shape of each aspherical surface can be defined by formula (1) given in Example 1 above.

[0139]

[0140] Table 13

[0141] Face number A4 A6 A8 A10 A12 A14 A16 A18 A20 S1 -7.4053E-03 8.2085E-03 -1.9954E-01 8.7487E-01 -2.3391E+00 3.6136E+00 -3.2763E+00 1.5724E+00 -3.0617E-01 S2 4.3886E-02 -1.5031E-01 1.0352E+00 -4.4789E+00 1.1014E+01 -1.6577E+01 1.5042E+01 -7.5390E+00 1.6000E+00 S3 1.1172E-01 4.3590E-01 -2.0069E+00 4.8699E+00 -6.8320E+00 5.3095E+00 -1.7242E+00 0.0000E+00 0.0000E+00 S4 5.4736E-01 -1.0980E+00 3.3361E+00 -7.9830E+00 1.3173E+01 -1.1960E+01 4.5868E+00 0.0000E+00 0.0000E+00 S5 -2.0312E-01 -1.5901E-02 2.3121E-02 1.8667E-01 -6.1201E+00 2.4350E+01 -4.4043E+01 4.0568E+01 -1.5563E+01 S6 -3.5353E-01 4.2518E-01 -1.1701E+00 1.8737E+00 -1.0227E+00 -2.5357E+00 6.2414E+00 -5.0223E+00 1.3767E+00 S7 -5.3321E-01 7.0204E-01 -3.1280E+00 1.0910E+01 -2.4725E+01 3.4417E+01 -2.7658E+01 1.1773E+01 -2.0621E+00 S8 -4.4783E-02 -3.5978E-01 7.6879E-01 -9.7130E-01 7.9399E-01 -4.2311E-01 1.4380E-01 -2.8670E-02 2.5631E-03

[0142] Table 14

[0143] Figure 14AOn-axis chromatic aberration curves of the optical imaging lens of embodiment 7 are shown, which represent the deviation of convergent focal points of light rays of different wavelengths after passing through the lens. Figure 14B Astigmatism curves of the optical imaging lens of embodiment 7 are shown, which represent the meridional image curvature and sagittal image curvature. Figure 14C Distortion curves of the optical imaging lens of embodiment 7 are shown, which represent the distortion size values corresponding to different field angles. Figure 14D Magnification chromatic aberration curves of the optical imaging lens of embodiment 7 are shown, which represent the deviation of different image heights of light rays on the imaging plane after passing through the lens. According to Figures 14A to 14D It can be seen that the optical imaging lens of embodiment 7 can achieve good imaging quality.

[0144] In summary, embodiments 1 to 7 respectively satisfy the relationships shown in Table 15.

[0145] Conditional expression \ Example 1 2 3 4 5 6 7 f2 / f -0.83 -0.59 -0.63 -0.70 -0.61 -1.10 -0.73 f / f4 -0.95 -0.87 -0.88 -0.63 -1.04 -0.90 -0.72 f1 / TTL 0.51 0.43 0.44 0.44 0.41 0.54 0.44 T23 / T34 1.36 2.16 2.88 2.37 1.42 1.31 2.87 f12 / f 0.86 0.82 0.87 0.85 0.80 0.85 0.84 (R1+R3) / (R1-R3) -0.49 -0.27 -0.29 -0.33 -0.23 -0.60 -0.10 SAG22 / SAG11 0.16 0.20 0.20 0.23 0.16 0.13 0.15 CT2 / CT4 0.71 0.59 0.45 0.31 0.31 0.47 0.36 DT21 / DT41 0.63 0.68 0.68 0.79 0.87 0.70 0.79 ∑CT / TTL 0.40 0.40 0.44 0.50 0.54 0.51 0.49 f*(ImgH / TTL)(mm) 1.82 1.98 1.89 1.85 1.87 1.82 1.82 f / ∑AT 2.69 2.75 2.84 3.36 3.67 3.26 3.12

[0146] Table 15

[0147] The present application also provides an imaging device, the electronic photosensitive element of which can be a charge coupled device (CCD) or a complementary metal oxide semiconductor (CMOS). The imaging device can be a standalone imaging apparatus such as a digital camera, or an imaging module integrated on a mobile electronic device such as a mobile phone. The imaging device is equipped with the optical imaging lens described above.

[0148] The above description is merely preferred embodiments of the present application and a description of the principles of the technology used. It should be understood by those skilled in the art that the scope of the application involved in the present application is not limited to the technical solutions formed by the specific combinations of the technical features described above, and should also cover other technical solutions formed by any combination of the above technical features or equivalent features without departing from the inventive concept. For example, the above features can be replaced with technical features disclosed in the present application (but not limited to) having similar functions to form technical solutions.

Claims

1. An optical imaging lens, in order from the object side to the image side along the optical axis, includes: The first lens, the second lens, the third lens and the fourth lens are characterized in that The first lens has positive optical power and its object side surface is convex; The second lens has negative optical power and its object side surface is concave; The third lens has optical power; The fourth lens has negative optical power and its object side surface is concave; The optical imaging lens has four lenses with optical power; The total effective focal length f of the optical imaging lens, the distance TTL from the object side of the first lens to the imaging surface of the optical imaging lens on the optical axis, and half the diagonal length of the effective pixel area on the imaging surface of the optical imaging lens ImgH satisfy 1.82mm≤f (ImgH / TTL)≤1.98mm; The maximum half field of view angle Semi-FOV of the optical imaging lens satisfies 22.53°≤Semi-FOV≤24.98°; The effective focal length f2 of the second lens and the total effective focal length f of the optical imaging lens satisfy -1.10≤f2 / f≤-0.59; The total effective focal length f of the optical imaging lens and the effective focal length f4 of the fourth lens satisfy -1.04≤f / f4≤-0.63; The curvature radius R1 of the object-side surface of the first lens and the curvature radius R3 of the object-side surface of the second lens satisfy -0.60≤(R1+R3) / (R1-R3)≤-0.10; The total effective focal length f of the optical imaging lens and the sum ΣAT of the distances between any two adjacent lenses from the first to the fourth lenses on the optical axis satisfy 2.69≤f / ΣAT≤3.67; and A distance T23 between the second lens and the third lens on the optical axis and a distance T34 between the third lens and the fourth lens on the optical axis satisfy 1.31≤T23 / T34≤2.

88.

2. The optical imaging lens according to claim 1, wherein: A center thickness CT2 of the second lens on the optical axis and a center thickness CT4 of the fourth lens on the optical axis satisfy 0.31≤CT2 / CT4≤0.

71.

3. The optical imaging lens according to claim 1, wherein: The effective focal length f1 of the first lens and the distance TTL from the object-side surface of the first lens to the imaging surface of the optical imaging lens on the optical axis satisfy 0.41≤f1 / TTL≤0.

54.

4. The optical imaging lens according to claim 1, wherein: The on-axis distance SAG11 from the intersection of the object side surface of the first lens and the optical axis to the effective radius vertex of the object side surface of the first lens and the on-axis distance SAG22 from the intersection of the image side surface of the second lens and the optical axis to the effective radius vertex of the image side surface of the second lens satisfy 0.10<SAG22 / SAG11≤0.

23.

5. The optical imaging lens according to claim 1, wherein: The combined focal length f12 of the first lens and the second lens and the total effective focal length f of the optical imaging lens satisfy 0.80≤f12 / f≤0.

87.

6. The optical imaging lens according to claim 1, wherein: A maximum effective radius DT21 of the object-side surface of the second lens and a maximum effective radius DT41 of the object-side surface of the fourth lens satisfy 0.63≤DT21 / DT41≤0.

87.

7. The optical imaging lens according to claim 1, wherein: A sum ΣCT of the center thicknesses of the first to fourth lenses on the optical axis and a distance TTL from the object-side surface of the first lens to the imaging surface of the optical imaging lens on the optical axis satisfy 0.40≤ΣCT / TTL≤0.54.

Images