Optical imaging lens

Abstract

The application discloses an optical imaging lens, wherein the optical imaging lens comprises, in sequence from the object side to the image side along the optical axis, a first lens with positive refractive power, the object side surface of which is a convex surface and the image side surface of which is a concave surface; a second lens with refractive power; a third lens with positive refractive power, the object side surface of which is a convex surface and the image side surface of which is a concave surface; a fourth lens with refractive power; a fifth lens with refractive power, the object side surface of which is a concave surface and the image side surface of which is a convex surface; and a sixth lens with positive refractive power, the object side surface of which is a convex surface and the image side surface of which is a concave surface; wherein the number of lenses with refractive power in the optical imaging lens is six; the distance TTL between the object side surface of the first lens and the imaging surface of the optical imaging lens on the optical axis and the entrance pupil diameter EPD of the optical imaging lens satisfy: 1.80 <= TTL / EPD <= 2.0.

Description

[0001] Divisional Application Declaration

[0002] This application is a divisional application of the China Invention Patent Application No. 201911001048.3 filed on October 21, 2019, the title of which is “Optical Imaging Lens” and the application number of which is 201911001048.3. TECHNICAL FIELD

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

[0004] With the continuous development of photography technology, solid-state imaging devices based on CCD or CMOS image sensors are continuously applied to photographic devices. Typical photographic devices include digital cameras, video cameras, and interchangeable lens cameras, etc. However, with the rapid development of mobile phones, solid-state imaging devices are continuously miniaturized and applied to smart phones. At the same time, in order to expand the application environment of mobile phone shooting and improve the shooting effect of mobile phones in insufficient light environment, the optical imaging lens in the solid-state imaging device needs to have the characteristics of miniaturization, large aperture, and high relative aperture. 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] One aspect of the present application provides an optical imaging lens comprising, in order from the object side to the image side along the optical axis, a first lens having positive refractive power; a second lens having refractive power; a third lens having positive refractive power; a fourth lens having refractive power; a fifth lens having refractive power, the object side surface of which is concave and the image side surface of which is convex; and a sixth lens having positive refractive power.

[0007] In one embodiment, the total effective focal length f of the optical imaging lens and the entrance pupil diameter EPD of the optical imaging lens satisfy: f / EPD<1.3.

[0008] In one embodiment, the effective focal length f1 of the first lens and the total effective focal length f of the optical imaging lens satisfy: 3<f1 / f<6.

[0009] In one embodiment, the effective focal length f3 of the third lens and the total effective focal length f of the optical imaging lens satisfy: 2.5<f3 / f<3.5.

[0010] In one embodiment, the central thickness CT4 of the fourth lens on the optical axis and the edge thickness ET4 of the fourth lens satisfy: 1<CT4 / ET4≤2.6.

[0011] In one embodiment, the radius of curvature R9 of the object side surface of the fifth lens and the radius of curvature R10 of the image side surface of the fifth lens satisfy: 1.5 < (R9+R10) / R9 < 2.5.

[0012] In one embodiment, the effective focal length f3 of the third lens and the radius of curvature R11 of the object side surface of the sixth lens satisfy: 5 < f3 / R11 < 8.

[0013] In one embodiment, the sum ∑T of the interval distances of any two adjacent lenses among the first lens to the sixth lens on the optical axis and the sum ∑H of the central thicknesses of the first lens to the sixth lens on the optical axis satisfy: 0.4 < ∑T / ∑H < 0.6.

[0014] In one embodiment, the axial distance SAG42 from the intersection of the image side surface of the fourth lens and the optical axis to the effective radius vertex of the image side surface of the fourth lens and the axial distance SAG51 from the intersection of the object side surface of the fifth lens and the optical axis to the effective radius vertex of the object side surface of the fifth lens satisfy: 0.7 ≤ SAG42 / SAG51 < 1.8.

[0015] In one embodiment, the axial distance SAG41 from the intersection of the object side surface of the fourth lens and the optical axis to the effective radius vertex of the object side surface of the fourth lens and the central thickness CT4 of the fourth lens on the optical axis satisfy: 0.5 < |SAG41 / CT4| < 1.

[0016] In one embodiment, 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 entrance pupil diameter EPD of the optical imaging lens satisfy: TTL / EPD ≤ 2.0.

[0017] In one embodiment, the radius of curvature R1 of the object side surface of the first lens and the radius of curvature R2 of the image side surface of the first lens satisfy: 0.6 < R1 / R2 < 0.9.

[0018] In one embodiment, the working waveband of the optical imaging lens is a near-infrared waveband of 900 nm-1000 nm.

[0019] The optical imaging lens provided in the present application comprises a plurality of lenses, for example, the first lens to the sixth lens. By reasonably setting the proportional relationship between the total effective focal length of the optical imaging lens and the entrance pupil diameter of the optical imaging lens, and optimizing the refractive power and surface shape of each lens, and reasonably matching with each other, the optical imaging lens can be miniaturized and thinned, while having the characteristics of large aperture, high relative luminance, infrared waveband imaging, etc. BRIEF DESCRIPTION OF DRAWINGS

[0020] 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:

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

[0022] Figures 2A to 2D Axial chromatic aberration curves, astigmatism curves, distortion curves, and relative illumination curves of the optical imaging lens of Embodiment 1 are shown respectively;

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

[0024] Figures 4A to 4D Axial chromatic aberration curves, astigmatism curves, distortion curves, and relative illumination curves of the optical imaging lens of Embodiment 2 are shown respectively;

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

[0026] Figures 6A to 6D Axial chromatic aberration curves, astigmatism curves, distortion curves, and relative illumination curves of the optical imaging lens of Embodiment 3 are shown respectively;

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

[0028] Figures 8A to 8D Axial chromatic aberration curves, astigmatism curves, distortion curves, and relative illumination curves of the optical imaging lens of Embodiment 4 are shown respectively;

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

[0030] Figures 10A to 10D Axial chromatic aberration curves, astigmatism curves, distortion curves, and relative illumination curves of the optical imaging lens of Embodiment 5 are shown respectively;

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

[0032] Figures 12A to 12D Axial chromatic aberration curves, astigmatism curves, distortion curves, and relative illumination curves of the optical imaging lens of Embodiment 6 are shown respectively;

[0033] Figure 131 shows a schematic structural diagram of an optical imaging lens according to Example 7 of the present application;

[0034] Figures 14A to 14D The axial chromatic aberration curve, astigmatism curve, distortion curve, and relative illumination curve of the optical imaging lens of Example 7 are respectively shown. DETAILED DESCRIPTION

[0035] For a better understanding of the present application, various aspects of the present application will be described in more detail with reference to the accompanying drawings. It should be understood that these detailed descriptions are merely descriptions of exemplary embodiments of the present application and are not intended to limit the scope of the present application in any way. Throughout the specification, the same reference numerals refer to the same elements. The expression "and / or" includes any and all combinations of one or more of the associated listed items.

[0036] It should be noted that in this specification, the terms "first," "second," "third," etc., are used solely to distinguish one feature from another and do not limit the features. Thus, the first lens discussed below could also be referred to as the second lens or the third lens without departing from the teachings of this application.

[0037] In the drawings, the thickness, size, and shape of the lenses are slightly exaggerated for ease of illustration. Specifically, the shapes of the spherical and aspherical surfaces shown in the drawings are provided by way of example. That is, the shapes of the spherical and aspherical surfaces are not limited to those shown in the drawings. The drawings are for illustration only and are not drawn strictly to scale.

[0038] In this article, the paraxial region refers to the area near the optical axis. If a lens surface is convex and the location of the convex surface is undefined, it means that the lens surface is convex at least in the paraxial region. If a lens surface is concave and the location of the concave surface is undefined, it means that the lens surface is concave at least in the paraxial region. The surface of each lens closest to the subject is called the object-side surface of the lens, and the surface of each lens closest to the imaging plane is called the image-side surface of the lens.

[0039] It should also be understood that the terms "comprises," "including," "having," "includes," and / or "comprising," when used in this specification, indicate the presence of the stated features, elements, and / or components, but do not preclude the presence or addition of one or more other features, elements, components, and / or combinations thereof. In addition, when expressions such as "at least one of..." appear after a list of listed features, they modify the entire list of features rather than modifying the individual elements in the list. In addition, when describing embodiments of the present application, "may" is used to mean "one or more embodiments of the present application." And, the term "exemplary" is intended to refer to an example or illustration.

[0040] Unless otherwise defined, all terms (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 overly idealized or formal sense unless expressly so defined herein.

[0041] 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 accompanying drawings and in conjunction with the embodiments.

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

[0043] The optical imaging lens according to the exemplary embodiments of the present application can include six lenses with optical power, i.e., a first lens, a second lens, a third lens, a fourth lens, a fifth lens, and a sixth lens. The six lenses are arranged in order along an optical axis from an object side to an image side. There can be an air gap between each adjacent lens.

[0044] In the exemplary embodiments, the first lens can have positive optical power; the second lens can have positive optical power or negative optical power; the third lens can have positive optical power; the fourth lens can have positive optical power or negative optical power; the fifth lens can have positive optical power or negative optical power, with a concave object side surface and a convex image side surface; and the sixth lens can have positive optical power. Reasonable matching of the optical power and surface type of each lens in the optical system can effectively balance the aberration of the optical system and improve the imaging quality.

[0045] In the exemplary embodiments, the object side surface of the first lens can be convex, and the image side surface can be concave.

[0046] In the exemplary embodiments, the object side surface of the third lens can be convex, and the image side surface can be concave.

[0047] In the exemplary embodiments, the object side surface of the sixth lens can be convex, and the image side surface can be concave.

[0048] In the exemplary embodiments, the total effective focal length f of the optical imaging lens and the entrance pupil diameter EPD of the optical imaging lens satisfy: f / EPD < 1.3, for example, 1.0 < f / EPD < 1.3. Setting the ratio of the total effective focal length of the optical imaging lens to the entrance pupil diameter of the optical imaging lens to be less than 1.3 is beneficial to improve the energy density of the imaging surface of the optical system and improve the signal-to-noise ratio of the output signal of the image sensor, i.e., to improve the infrared measurement accuracy of the optical system.

[0049] In the example embodiment, the effective focal length f1 of the first lens and the total effective focal length f of the optical imaging lens satisfy: 3 < f1 / f < 6. Setting the ratio of the effective focal length of the first lens to the total effective focal length of the optical imaging lens in a reasonable numerical range is conducive to increasing the field of view angle of the optical imaging lens.

[0050] In the example embodiment, the effective focal length f3 of the third lens and the total effective focal length f of the optical imaging lens satisfy: 2.5 < f3 / f < 3.5. Reasonably setting the proportional relationship between the effective focal length of the third lens and the total effective focal length of the optical imaging lens makes the optical system power be reasonably distributed, which is conducive to improving the aberration of the optical system.

[0051] In the example embodiment, the central thickness CT4 of the fourth lens on the optical axis and the edge thickness ET4 of the fourth lens satisfy: 1 < CT4 / ET4 ≤ 2.6. Setting the ratio of the central thickness of the fourth lens on the optical axis to the edge thickness of the fourth lens in a reasonable numerical range is conducive to reducing the processing difficulty of the lens, while reducing the angle between the chief ray in the optical system and the optical axis when the chief ray is incident on the imaging surface, and improving the relative luminance of the imaging surface of the optical system.

[0052] In the example embodiment, the radius of curvature R9 of the object side surface of the fifth lens and the radius of curvature R10 of the image side surface of the fifth lens satisfy: 1.5 < (R9+R10) / R9 < 2.5. Reasonably setting the mutual relationship between the radius of curvature of the object side surface of the fifth lens and the radius of curvature of the image side surface of the fifth lens is conducive to the fifth lens having appropriate power, while reducing the angle between the chief ray in the optical system and the optical axis when the chief ray is incident on the imaging surface, and improving the light intensity at the imaging surface of the optical system.

[0053] In the example embodiment, the effective focal length f3 of the third lens and the radius of curvature R11 of the object side surface of the sixth lens satisfy: 5 < f3 / R11 < 8. Reasonably setting the proportional relationship between the effective focal length of the third lens and the radius of curvature of the object side surface of the sixth lens is conducive to better balancing the aberration of the optical system and improving the system resolution.

[0054] In the example embodiment, the sum ∑T of the interval distances of any two adjacent lenses among the first to sixth lenses on the optical axis and the sum ∑H of the central thicknesses of the first to sixth lenses on the optical axis satisfy: 0.4 < ∑T / ∑H < 0.6. Reasonably setting the proportional relationship between the sum of the interval distances of any two adjacent lenses among the first to sixth lenses on the optical axis and the sum of the central thicknesses of the first to sixth lenses on the optical axis is conducive to reducing the size of the optical imaging lens, avoiding the optical imaging lens being too large in volume, reducing the assembly difficulty of the lens, and improving the space utilization in the lens.

[0055] In the example embodiments, the axial distance SAG42 from the intersection of the image side surface of the fourth lens and the optical axis to the effective radius vertex of the image side surface of the fourth lens and the axial distance SAG51 from the intersection of the object side surface of the fifth lens and the optical axis to the effective radius vertex of the object side surface of the fifth lens satisfy: 0.7≤SAG42 / SAG51<1.8. The ratio of the axial distance from the intersection of the image side surface of the fourth lens and the optical axis to the effective radius vertex of the image side surface of the fourth lens to the axial distance from the intersection of the object side surface of the fifth lens and the optical axis to the effective radius vertex of the object side surface of the fifth lens is set within a reasonable numerical range, which is conducive to reducing the incidence angle of the chief ray in the optical system when incident on the image plane, improving the relative luminance of the imaging plane, and facilitating the machining and manufacturing of the fourth lens and the fifth lens.

[0056] In the example embodiments, the axial distance SAG41 from the intersection of the object side surface of the fourth lens and the optical axis to the effective radius vertex of the object side surface of the fourth lens and the central thickness CT4 of the fourth lens on the optical axis satisfy: 0.5<|SAG41 / CT4|<1. The proportional relationship between the axial distance from the intersection of the object side surface of the fourth lens and the optical axis to the effective radius vertex of the object side surface of the fourth lens and the central thickness of the fourth lens on the optical axis is reasonably set, which is conducive to avoiding excessive bending of the fourth lens, reducing the difficulty of lens machining, and improving the ability of the optical imaging lens to balance chromatic aberration and distortion.

[0057] In the example embodiments, the distance TTL from the object side surface of the first lens to the imaging plane of the optical imaging lens on the optical axis and the entrance pupil diameter EPD of the optical imaging lens satisfy: TTL / EPD≤2.0, for example, 1.80<TTL / EPD≤2.0. The proportional relationship between the distance from the object side surface of the first lens to the imaging plane of the optical imaging lens on the optical axis and the entrance pupil diameter of the optical imaging lens is reasonably set, which is conducive to increasing the light flux of the optical system, improving the shooting effect of the lens in a dark environment, and facilitating miniaturization of the lens.

[0058] In the example embodiments, the curvature radius R1 of the object side surface of the first lens and the curvature radius R2 of the image side surface of the first lens satisfy: 0.6<R1 / R2<0.9. The proportional relationship between the curvature radius of the object side surface of the first lens and the curvature radius of the image side surface of the first lens is reasonably set, which is conducive to weakening ghost images formed by light reflection inside the optical system and improving system spherical aberration and reducing the field of view sensitivity of the central region of the optical system.

[0059] In the example embodiments, the working waveband of the optical imaging lens is a near-infrared waveband of 900 nm-1000 nm.

[0060] In the exemplary embodiments, the optical imaging lens described above can further comprise a diaphragm. The diaphragm can be disposed at a proper position as required. For example, the diaphragm can be disposed between the first lens and the second lens, close to the object side of the second lens. Alternatively, the optical imaging lens described above can further comprise a filter for correcting color deviation and / or a protective glass for protecting the photosensitive element located on the imaging plane.

[0061] The optical imaging lens according to the above-described embodiments of the present application can employ multiple lenses, for example, six lenses as described above. The optical imaging lens of the present application meets the requirements of large aperture, miniaturization, higher relative aperture, etc., and still has a clear imaging effect in a poor light environment such as rainy days, dusk, etc. The imaging lens configured according to the above can be used in the near-infrared band and can be applied to fields such as detection, identification, etc.

[0062] In the exemplary embodiments, at least one of the lens surfaces of each lens is an aspherical lens surface, i.e., at least one of the lens surfaces from the object side of the first lens to the image side of the sixth lens is an aspherical lens surface. The aspherical lens has the characteristic that the curvature continuously changes 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, the aspherical lens has better curvature radius characteristics, has the advantages of improving the distortion aberration and improving the astigmatism aberration. After using the aspherical lens, the aberration that occurs during imaging can be eliminated as much as possible, thereby improving the imaging quality. Alternatively, at least one of the object side and the image side of each of the first lens, the second lens, the third lens, the fourth lens, the fifth lens, and the sixth lens is an aspherical lens surface. Alternatively, the object side and the image side of each of the first lens, the second lens, the third lens, the fourth lens, the fifth lens, and the sixth lens are aspherical lens surfaces.

[0063] The present application also provides an imaging device, and the electronic photosensitive element thereof can be a charge-coupled device (CCD) or a complementary metal-oxide-semiconductor device (CMOS). The imaging device can be a standalone imaging equipment 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.

[0064] The exemplary embodiments of the present application also provide an electronic device comprising the imaging device described above.

[0065] However, it should be understood by those skilled in the art 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 six lenses are described as an example in the embodiments, the optical imaging lens is not limited to comprising six lenses. If necessary, the optical imaging lens can further comprise other numbers of lenses.

[0066] Specific embodiments of the optical imaging lens applicable to the above embodiments are further described below with reference to the accompanying drawings.

[0067] Example 1

[0068] The following describes an optical imaging lens according to Embodiment 1 of the present application. Figures 1 to 2D is a structural schematic diagram showing an optical imaging lens according to Embodiment 1 of the present application. Figure 1 is a structural schematic diagram showing an optical imaging lens according to Embodiment 1 of the present application.

[0069] As shown in Figure 1 , the optical imaging lens sequentially includes, along the optical axis from the object side to the image side, a first lens E1, a stop STO, a second lens E2, a third lens E3, a fourth lens E4, a fifth lens E5, a sixth lens E6, a filter E7, and an imaging surface S15.

[0070] The first lens E1 has positive refractive power, with the object side surface S1 being a convex surface and the image side surface S2 being a concave surface. The second lens E2 has positive refractive power, with the object side surface S3 being a concave surface and the image side surface S4 being a convex surface. The third lens E3 has positive refractive power, with the object side surface S5 being a convex surface and the image side surface S6 being a concave surface. The fourth lens E4 has positive refractive power, with the object side surface S7 being a convex surface and the image side surface S8 being a convex surface. The fifth lens E5 has positive refractive power, with the object side surface S9 being a concave surface and the image side surface S10 being a convex surface. The sixth lens E6 has positive refractive power, with the object side surface S11 being a convex surface and the image side surface S12 being a concave surface. The filter E7 has an object side surface S13 and an image side surface S14. Light from an object sequentially passes through the surfaces S1 to S14 and is finally imaged on the imaging surface S15.

[0071] Table 1 shows a basic parameter table of the optical imaging lens of Embodiment 1, wherein the units of the radius of curvature, the thickness / distance, and the focal length are all millimeters (mm).

[0072]

[0073] Table 1

[0074] In this embodiment, the total effective focal length f of the optical imaging lens is 3.42 mm, the distance TTL on the optical axis from the object side surface S1 of the first lens E1 to the imaging surface S15 is 5.70 mm, the half diagonal length of the effective pixel area on the imaging surface S15 is ImgH = 2.90 mm, the maximum half field angle Semi-FOV of the optical imaging lens is 38.6°, and the aperture number Fno of the optical imaging lens is 1.12.

[0075] In Example 1, the object-side surface and the image-side surface of any lens among the first lens E1 to the sixth lens E6 are both aspherical surfaces. The surface shape x of each aspherical lens can be defined by, but is not limited to, the following aspherical surface formula:

[0076]

[0077] Wherein, x is the distance vector height of the aspheric surface from the vertex of the aspheric surface at a height of h along the optical axis; c is the paraxial curvature of the aspheric surface, c = 1 / R (i.e., the paraxial curvature c is the reciprocal of the curvature radius R in Table 1 above); k is the conic coefficient; Ai is the correction coefficient of the i-th order of the aspheric surface. Table 2 below lists the high-order coefficients A4, A6, A8, A9, A10, A11, A12, A13, A14, A15, A16, A17, A18, A19, A20, A21, A22, A23, A24, A25, A26, A27, A28, A29, A30, A31, A32, A33, A34, A35, A36, A37, A38, A39 10 、A 12 、A 14 、A 16 、A 18 and A 20 .

[0078]

[0079]

[0080] Table 2

[0081] Figure 2A The axial chromatic aberration curve of the optical imaging lens of Example 1 is shown, which indicates the deviation of the focal point of light of different wavelengths passing through the lens. Figure 2B The astigmatism curve of the optical imaging lens of Example 1 is shown, which represents the meridional field curvature and the sagittal field curvature. Figure 2C The distortion curve of the optical imaging lens of Example 1 is shown, which represents the distortion magnitude values ​​corresponding to different image heights. Figure 2D The relative illumination curve of the optical imaging lens of Example 1 is shown, which represents the relative illumination corresponding to different image heights on the imaging surface of the optical system. Figures 2A to 2D It can be seen that the optical imaging lens provided in Example 1 can achieve good imaging quality.

[0082] Example 2

[0083] The following reference Figures 3 to 4D The optical imaging lens according to Example 2 of the present application is described. Figure 3 A schematic structural diagram of an optical imaging lens according to Example 2 of the present application is shown.

[0084] like Figure 3As shown, the optical imaging lens includes, from the object side to the image side along the optical axis, a first lens E1, an aperture STO, a second lens E2, a third lens E3, a fourth lens E4, a fifth lens E5, a sixth lens E6, a filter E7 and an imaging surface S15.

[0085] The first lens E1 has positive focal power, with its object-side surface S1 being convex and its image-side surface S2 being concave. The second lens E2 has negative focal power, with its object-side surface S3 being concave and its image-side surface S4 being convex. The third lens E3 has positive focal power, with its object-side surface S5 being convex and its image-side surface S6 being concave. The fourth lens E4 has negative focal power, with its object-side surface S7 being convex and its image-side surface S8 being concave. The fifth lens E5 has positive focal power, with its object-side surface S9 being concave and its image-side surface S10 being convex. The sixth lens E6 has positive focal power, with its object-side surface S11 being convex and its image-side surface S12 being concave. The filter E7 has an object-side surface S13 and an image-side surface S14. Light from an object passes through each surface S1 to S14 in sequence and is ultimately imaged on the imaging surface S15.

[0086] In this embodiment, the total effective focal length of the optical imaging lens is f = 3.58 mm, the distance TTL on the optical axis from the object-side surface S1 of the first lens element E1 to the imaging surface S15 is 6.04 mm, half the diagonal length of the effective pixel area on the imaging surface S15 is ImgH = 2.90 mm, the maximum half field of view Semi-FOV of the optical imaging lens is 37.6°, and the aperture number Fno of the optical imaging lens is 1.11.

[0087] Table 3 shows the basic parameters of the optical imaging lens of Example 2, wherein the units of curvature radius, thickness / distance, and focal length are all millimeters (mm).

[0088]

[0089]

[0090] Table 3

[0091] In Example 2, the object side surface and the image side surface of any lens from the first lens E1 to the sixth lens E6 are aspherical surfaces. Table 4 below lists the high-order coefficients A4, A6, A8, A9, A10, A11, A12, A13, A14, A15, A16, A17, A18, A19, A20, A21, A22, A23, A24, A25, A26, A27, A28, A29, A30, A31, A32, A33, A34, A35, A36, A37, A38, A39, A40, A41, A42, A43, A44, A45, A46, A47, A48, A49, A50, A51, A52, A53, A54, A55, A56, A57, A58, A 10 、A 12 、A 14 、A 16 、A 18 and A 20 .

[0092] Face No. A4 A6 A8 A10 A12 A14 A16 A18 A20 S1 2.2279E-02 -1.6045E-02 7.6090E-03 -8.5508E-03 5.7412E-03 -2.3786E-03 5.1914E-04 -4.3820E-05 0.0000E+00 S2 1.3154E-02 -2.3106E-02 3.8426E-03 -4.3199E-04 -3.0297E-03 3.4968E-03 -1.5470E-03 3.1404E-04 -2.4400E-05 S3 8.9502E-02 -1.0029E-01 6.6086E-02 -2.9517E-02 7.8136E-03 2.4571E-05 -5.6995E-04 9.9639E-05 0.0000E+00 S4 1.0885E-02 -6.0711E-02 9.1811E-02 -9.8380E-02 8.2450E-02 -4.8223E-02 1.7970E-02 -3.8139E-03 3.5106E-04 S5 1.5865E-01 -2.9235E-01 3.1206E-01 -2.6208E-01 1.6119E-01 -6.8628E-02 1.8901E-02 -3.0406E-03 2.1986E-04 S6 -3.1383E-02 -3.1796E-02 -4.1014E-02 7.7156E-02 -6.4231E-02 3.1595E-02 -9.6257E-03 1.6842E-03 -1.2962E-04 S7 -2.4385E-02 5.4145E-03 -2.8396E-02 3.0217E-02 -1.9477E-02 5.7104E-03 -1.3569E-04 -2.4045E-04 3.2300E-05 S8 -1.9569E-02 2.0069E-02 -6.0762E-02 6.9741E-02 -4.4817E-02 1.6139E-02 -3.1916E-03 3.2057E-04 -1.2550E-05 S9 1.2290E-01 -1.6806E-01 1.5407E-01 -9.8960E-02 4.5978E-02 -1.4125E-02 2.6213E-03 -2.6367E-04 1.1018E-05 S10 4.8726E-02 -3.2982E-01 1.0370E+00 -1.9325E+00 2.3449E+00 -1.9263E+00 1.0880E+00 -4.2044E-01 1.0787E-01 S11 -1.2032E-01 7.4915E-02 -3.6724E-02 1.2323E-02 -2.7069E-03 3.6347E-04 -2.5904E-05 6.3787E-07 1.0664E-08 S12 -1.3031E-01 6.1341E-02 -2.1722E-02 5.0812E-03 -6.7875E-04 2.4212E-05 6.3519E-06 -9.1611E-07 3.8767E-08

[0093] Table 4

[0094] Figure 4A The axial chromatic aberration curve of the optical imaging lens of Embodiment 2 is shown, which represents the convergence point deviation 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 image heights. Figure 4D The relative illumination curve of the optical imaging lens of Embodiment 2 is shown, which represents the relative illumination size on the imaging surface in the optical system corresponding to different image heights. According to Figures 4A to 4D It can be known that the optical imaging lens given in Embodiment 2 can achieve good imaging quality.

[0095] Example 3

[0096] The following refers to Figures 5 to 6D An optical imaging lens according to Embodiment 3 of the present application is described. Figure 5 The structural schematic diagram of the optical imaging lens according to Embodiment 3 of the present application is shown.

[0097] As Figure 5 shown, the optical imaging lens sequentially includes, along the optical axis from the object side to the image side: a first lens E1, a stop STO, a second lens E2, a third lens E3, a fourth lens E4, a fifth lens E5, a sixth lens E6, a filter E7, and an imaging surface S15.

[0098] 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 convex 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 positive refractive power, the object side surface S7 is a convex surface, and the image side surface S8 is a convex surface. The fifth lens E5 has negative refractive power, the object side surface S9 is a concave surface, and the image side surface S10 is a convex surface. The sixth lens E6 has positive refractive power, the object side surface S11 is a convex surface, and the image side surface S12 is a concave surface. The filter E7 has an object side surface S13 and an image side surface S14. Light from an object sequentially passes through each surface S1 to S14 and is finally imaged on the imaging surface S15.

[0099] In the present embodiment, the total effective focal length of the optical imaging lens f = 3.41 mm, the distance TTL on the optical axis from the object side surface S1 of the first lens E1 to the imaging surface S15 is 5.79 mm, the half diagonal length of the effective pixel area on the imaging surface S15 ImgH = 2.90 mm, the maximum half field angle of the optical imaging lens Semi-FOV = 38.7°, and the aperture number of the optical imaging lens Fno = 1.12.

[0100] Table 5 shows the basic parameters of the optical imaging lens of Example 3, wherein the units of curvature radius, thickness / distance, and focal length are all millimeters (mm).

[0101]

[0102] Table 5

[0103] In Example 3, the object side surface and the image side surface of any lens from the first lens E1 to the sixth lens E6 are all aspherical surfaces. Table 6 below lists the high-order coefficients A4, A6, A8, A9, A10, A11, A12, A13, A14, A15, A16, A17, A18, A19, A20, A21, A22, A23, A24, A25, A26, A27, A28, A29, A30, A31, A32, A33, A34, A35, A36, A37, A38, A39, A40, A41, A42, A43, A44, A45, A46, A47, A48, A49, A50, A51, A52, A53, A54, A55, A56, A57, A58, 10 、A 12 、A 14 、A 16 、A 18 and A 20 .

[0104] Face No. A4 A6 A8 A10 A12 A14 A16 A18 A20 S1 3.1558E-02 -3.3179E-02 2.5850E-02 -2.2239E-02 1.2377E-02 -4.6651E-03 1.0352E-03 -9.4884E-05 0.0000E+00 S2 5.7593E-02 -1.6609E-01 2.6794E-01 -3.4658E-01 2.7486E-01 -1.2906E-01 3.5272E-02 -5.1844E-03 3.1633E-04 S3 1.0965E-01 -1.7600E-01 2.1520E-01 -1.9700E-01 1.1863E-01 -4.1270E-02 7.2912E-03 -4.8251E-04 0.0000E+00 S4 -1.2489E-01 3.4061E-01 -5.6022E-01 6.2921E-01 -4.5724E-01 2.0921E-01 -5.8016E-02 8.7898E-03 -5.4133E-04 S5 3.3523E-02 2.2958E-02 -1.7373E-01 2.7385E-01 -2.4736E-01 1.3492E-01 -4.4111E-02 7.9561E-03 -6.0451E-04 S6 -8.0201E-02 1.0310E-02 -4.1519E-02 7.0856E-02 -7.2319E-02 4.1720E-02 -1.3616E-02 2.3462E-03 -1.6757E-04 S7 -2.3262E-02 5.0447E-03 -2.5840E-02 2.6856E-02 -1.6908E-02 4.8415E-03 -1.1236E-04 -1.9447E-04 2.5515E-05 S8 -2.2429E-02 -2.4801E-02 -7.6389E-03 4.0612E-02 -4.7965E-02 3.3823E-02 -1.3808E-02 2.9179E-03 -2.4496E-04 S9 1.9754E-01 -3.4244E-01 3.9799E-01 -3.2409E-01 1.9090E-01 -7.4350E-02 1.7492E-02 -2.2307E-03 1.1817E-04 S10 3.3845E-02 -1.9308E-01 7.4261E-01 -1.5959E+00 2.2262E+00 -2.1413E+00 1.4674E+00 -7.2776E-01 2.6182E-01 S11 -1.1141E-01 1.0593E-01 -9.5525E-02 5.9026E-02 -2.4437E-02 6.5908E-03 -1.1028E-03 1.0319E-04 -4.1019E-06 S12 -1.4040E-01 7.1913E-02 -3.3404E-02 1.1834E-02 -3.0053E-03 5.1768E-04 -5.6942E-05 3.5768E-06 -9.6570E-08

[0105] Table 6

[0106] Figure 6A The axial chromatic aberration curve of the optical imaging lens of Example 3 is shown, which indicates the deviation of the focal point of light of different wavelengths passing through the lens. Figure 6B The astigmatism curve of the optical imaging lens of Example 3 is shown, which represents the meridional field curvature and the sagittal field curvature. Figure 6C The distortion curve of the optical imaging lens of Example 3 is shown, which represents the distortion values ​​corresponding to different image heights. Figure 6D The relative illumination curve of the optical imaging lens of Example 3 is shown, which represents the relative illumination corresponding to different image heights on the imaging surface of the optical system. Figures 6A to 6D It can be seen that the optical imaging lens provided in Example 3 can achieve good imaging quality.

[0107] Example 4

[0108] The following reference Figures 7 to 8D The optical imaging lens according to Example 4 of the present application is described. Figure 7 A schematic structural diagram of an optical imaging lens according to Example 4 of the present application is shown.

[0109] like Figure 7 As shown, the optical imaging lens includes, from the object side to the image side along the optical axis, a first lens E1, an aperture STO, a second lens E2, a third lens E3, a fourth lens E4, a fifth lens E5, a sixth lens E6, a filter E7 and an imaging surface S15.

[0110] The first lens E1 has positive refractive power, the object side surface S1 is convex, and the image side surface S2 is concave. The second lens E2 has negative refractive power, the object side surface S3 is concave, and the image side surface S4 is convex. The third lens E3 has positive refractive power, the object side surface S5 is convex, and the image side surface S6 is concave. The fourth lens E4 has positive refractive power, the object side surface S7 is convex, and the image side surface S8 is convex. The fifth lens E5 has positive refractive power, the object side surface S9 is concave, and the image side surface S10 is convex. The sixth lens E6 has positive refractive power, the object side surface S11 is convex, and the image side surface S12 is concave. The filter E7 has an object side surface S13 and an image side surface S14. Light from an object passes through the surfaces S1-S14 in sequence and is finally imaged on the imaging surface S15.

[0111] In this embodiment, the total effective focal length of the optical imaging lens f = 3.49 mm, the distance on the optical axis from the object side surface S1 of the first lens E1 to the imaging surface S15 TTL = 6.00 mm, half the diagonal length of the effective pixel area on the imaging surface S15 ImgH = 2.90 mm, the maximum half field angle of the optical imaging lens Semi-FOV = 40.1°, and the aperture number of the optical imaging lens Fno = 1.11.

[0112] Table 7 shows the basic parameter table of the optical imaging lens of embodiment 4, wherein the units of the curvature radius, thickness / distance, and focal length are all millimeters (mm).

[0113]

[0114] Table 7

[0115] In embodiment 4, the object side surface and the image side surface of any one of the first lens E1 to the sixth lens E6 are aspherical surfaces. The following table 8 gives the high order term coefficients A4, A6, A8, A10, A12, A14, A16, A18, A20, A22, A24, A26, A28, A30, A32, A34, A36, A38, A40, A42, A44, A46, A48, A50, A52, A54, A56, A58, A60, A62, A64, A66, A68, A70, A72, A74, A76, A78, A80, A82, A84, A86, A88, A90, A92, A94, A96, A98, and A100 of the aspherical surfaces S1-S12 that can be used in embodiment 4. 10 12 14 16 18 20 .

[0116] Face No. A4 A6 A8 A10 A12 A14 A16 A18 A20 S1 2.8326E-02 -9.5942E-03 -2.2199E-02 3.1601E-02 -2.1518E-02 7.1731E-03 -1.1035E-03 6.1573E-05 0.0000E+00 S2 5.6540E-02 -1.2209E-01 1.3262E-01 -1.7209E-01 1.6427E-01 -9.5453E-02 3.2532E-02 -6.0291E-03 4.7253E-04 S3 1.0451E-01 -1.6791E-01 1.3986E-01 -7.0294E-02 2.6875E-02 -8.0309E-03 1.4897E-03 -1.1287E-04 0.0000E+00 S4 -2.7880E-02 3.1823E-02 -2.6972E-02 3.8860E-02 -2.2110E-02 -2.4618E-03 6.6740E-03 -2.3521E-03 2.7500E-04 S5 1.3215E-01 -2.4867E-01 2.8720E-01 -2.2327E-01 9.5781E-02 -1.4236E-02 -5.6445E-03 2.8448E-03 -3.6555E-04 S6 -6.2451E-02 -3.1517E-02 1.0703E-02 2.6143E-02 -5.5253E-02 4.4403E-02 -1.9063E-02 4.3070E-03 -4.0169E-04 S7 -3.7106E-02 1.0163E-02 -6.5750E-02 8.6309E-02 -6.8627E-02 2.4819E-02 -7.2752E-04 -1.5903E-03 2.6352E-04 S8 -3.0509E-02 -3.7840E-02 4.1196E-02 -4.8322E-02 3.9210E-02 -2.1862E-02 8.5906E-03 -1.9702E-03 1.8592E-04 S9 2.2498E-01 -4.1621E-01 5.1624E-01 -4.4863E-01 2.8201E-01 -1.1722E-01 2.9431E-02 -4.0053E-03 2.2644E-04 S10 3.4941E-02 -2.0378E-01 9.8775E-01 -2.7267E+00 4.8644E+00 -5.9597E+00 5.1886E+00 -3.2611E+00 1.4835E+00 S11 -1.6861E-01 1.4208E-01 -9.4669E-02 4.3129E-02 -1.3366E-02 2.7484E-03 -3.5516E-04 2.5972E-05 -8.1748E-07 S12 -1.5986E-01 1.0427E-01 -5.2166E-02 1.7910E-02 -4.1402E-03 6.2429E-04 -5.8313E-05 3.0387E-06 -6.6913E-08

[0117] Table 8

[0118] Figure 8A The on-axis chromatic aberration curve of the optical imaging lens of embodiment 4 is shown, which represents the deviation of the converging focal points of light rays of different wavelengths after passing through the lens. Figure 8B The astigmatism curve of the optical imaging lens of embodiment 4 is shown, which represents the meridional image surface curvature and sagittal image surface curvature. Figure 8C ​​​​​The distortion curve of the optical imaging lens of Embodiment 4 is shown, which represents the distortion size values corresponding to different image heights. Figure 8D The relative illumination curve of the optical imaging lens of Embodiment 4 is shown, which represents the relative illumination size corresponding to different image heights on the imaging surface in the optical system. According to the relative illumination curve, the relative illumination size of the optical imaging lens of Embodiment 4 is 1.00 at the center of the imaging surface, and is 0.70 at the edge of the imaging surface. Figures 8A to 8D It can be known that the optical imaging lens given in Embodiment 4 can achieve good imaging quality.

[0119] Example 5

[0120] The optical imaging lens according to Embodiment 5 of the present application is described below with reference to the accompanying drawings. Figures 9 to 10D The structure schematic diagram of the optical imaging lens according to Embodiment 5 of the present application is shown. Figure 9 The structure schematic diagram of the optical imaging lens according to Embodiment 5 of the present application is shown.

[0121] As shown in Figure 9 the optical imaging lens sequentially comprises, along the optical axis from the object side to the image side: a first lens E1, a stop STO, a second lens E2, a third lens E3, a fourth lens E4, a fifth lens E5, a sixth lens E6, a filter E7, and an imaging surface S15.

[0122] 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 positive refractive power, the object side surface S3 is a convex surface, and the image side surface S4 is a convex 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 positive refractive power, the object side surface S7 is a concave surface, and the image side surface S8 is a convex surface. The fifth lens E5 has negative refractive power, the object side surface S9 is a concave surface, and the image side surface S10 is a convex surface. The sixth lens E6 has positive refractive power, the object side surface S11 is a convex surface, and the image side surface S12 is a concave surface. The filter E7 has an object side surface S13 and an image side surface S14. Light from the object sequentially passes through each surface S1 to S14 and is finally imaged on the imaging surface S15.

[0123] In the present embodiment, the total effective focal length f of the optical imaging lens is 4.01 mm, the distance TTL on the optical axis from the object side surface S1 of the first lens E1 to the imaging surface S15 is 6.58 mm, the half diagonal length of the effective pixel area on the imaging surface S15 is ImgH = 2.90 mm, the maximum half field angle Semi-FOV of the optical imaging lens is 34.9°, and the F number Fno of the optical imaging lens is 1.13.

[0124] Table 9 shows the basic parameter table of the optical imaging lens of Embodiment 5, wherein the units of the curvature radius, the thickness / distance, and the focal length are all millimeters (mm).

[0125]

[0126]

[0127] Table 9

[0128] In Example 5, the object side surface and the image side surface of any lens from the first lens E1 to the sixth lens E6 are aspherical surfaces. Table 10 below lists the high-order coefficients A4, A6, A8, A9, A10, A11, A12, A13, A14, A15, A16, A17, A18, A19, A20, A21, A22, A23, A24, A25, A26, A27, A28, A29, A30, A31, A32, A33, A34, A35, A36, A37, A38, A39, A40, A41, A42, A43, A44, A45, A46, A47, A48, A49, A50, A51, A52, A53, A54, A55, A56, A57, A58, A59, A60, A61, A71, A72, A73, A74, A75 10 、A 12 、A 14 、A 16 、A 18 and A 20 .

[0129] Face No. A4 A6 A8 A10 A12 A14 A16 A18 A20 S1 9.2910E-03 -8.2565E-03 5.3535E-03 -3.7173E-03 1.6157E-03 -5.0271E-04 9.0544E-05 -6.5184E-06 0.0000E+00 S2 3.0310E-02 -8.3015E-02 8.9791E-02 -7.9266E-02 4.5940E-02 -1.6236E-02 3.3835E-03 -3.8246E-04 1.8082E-05 S3 8.7409E-02 -1.5372E-01 1.5906E-01 -1.0828E-01 4.7194E-02 -1.2187E-02 1.6672E-03 -9.0794E-05 0.0000E+00 S4 -6.0194E-02 1.1737E-01 -1.3108E-01 1.1041E-01 -6.3229E-02 2.2869E-02 -4.8917E-03 5.4090E-04 -2.1232E-05 S5 7.0113E-02 -1.1919E-01 1.4947E-01 -1.5199E-01 1.0667E-01 -5.1055E-02 1.5727E-02 -2.7674E-03 2.0966E-04 S6 -9.4602E-02 2.0807E-02 -4.0695E-02 5.8976E-02 -5.8309E-02 3.3518E-02 -1.1147E-02 2.0188E-03 -1.5664E-04 S7 -6.0998E-02 -5.4734E-03 3.1200E-02 -7.0494E-02 8.0270E-02 -5.3150E-02 2.0474E-02 -4.2144E-03 3.5683E-04 S8 -6.6546E-02 3.5117E-02 -4.0917E-02 4.6060E-02 -3.1643E-02 1.2947E-02 -3.0615E-03 3.8160E-04 -1.9190E-05 S9 1.3263E-01 -1.7486E-01 1.8925E-01 -1.2544E-01 5.3796E-02 -1.4932E-02 2.5863E-03 -2.5443E-04 1.0837E-05 S10 6.3509E-02 -1.1801E-01 2.7237E-01 -4.5424E-01 5.3595E-01 -4.4811E-01 2.6816E-01 -1.1574E-01 3.6046E-02 S11 -7.8914E-02 3.7297E-02 -1.4832E-02 4.1949E-03 -7.6402E-04 8.4880E-05 -5.1501E-06 1.2004E-07 8.9200E-10 S12 -8.7666E-02 4.2813E-02 -1.6401E-02 4.3254E-03 -7.2462E-04 6.9508E-05 -2.8427E-06 -4.4383E-08 5.4208E-09

[0130] Table 10

[0131] 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 image heights. Figure 10D The relative illumination curve of the optical imaging lens of Example 5 is shown, which represents the relative illumination corresponding to different image heights on the imaging surface of the optical system. Figures 10A to 10D It can be seen that the optical imaging lens provided in Example 5 can achieve good imaging quality.

[0132] Example 6

[0133] The following reference Figures 11 to 12D The optical imaging lens according to Example 6 of the present application is described. Figure 11 A schematic structural diagram of an optical imaging lens according to Example 6 of the present application is shown.

[0134] like Figure 11 As shown, the optical imaging lens includes, from the object side to the image side along the optical axis, a first lens E1, an aperture STO, a second lens E2, a third lens E3, a fourth lens E4, a fifth lens E5, a sixth lens E6, a filter E7 and an imaging surface S15.

[0135] The first lens E1 has positive focal power, with its object-side surface S1 being convex and its image-side surface S2 being concave. The second lens E2 has negative focal power, with its object-side surface S3 being concave and its image-side surface S4 being concave. The third lens E3 has positive focal power, with its object-side surface S5 being convex and its image-side surface S6 being concave. The fourth lens E4 has positive focal power, with its object-side surface S7 being convex and its image-side surface S8 being convex. The fifth lens E5 has positive focal power, with its object-side surface S9 being concave and its image-side surface S10 being convex. The sixth lens E6 has positive focal power, with its object-side surface S11 being convex and its image-side surface S12 being concave. The filter E7 has an object-side surface S13 and an image-side surface S14. Light from the object passes through each surface S1 to S14 in sequence and is ultimately imaged on the imaging surface S15.

[0136] In this embodiment, the total effective focal length of the optical imaging lens is f = 3.23 mm, the distance TTL on the optical axis from the object-side surface S1 of the first lens element E1 to the imaging surface S15 is 5.64 mm, half the diagonal length of the effective pixel area on the imaging surface S15 is ImgH = 2.56 mm, the maximum half field of view Semi-FOV of the optical imaging lens is 40.2°, and the aperture number Fno of the optical imaging lens is 1.12.

[0137] Table 11 shows the basic parameters of the optical imaging lens of Example 6, where the units of curvature radius, thickness / distance, and focal length are all millimeters (mm).

[0138]

[0139] Table 11

[0140] In Example 6, the object side surface and the image side surface of any lens from the first lens E1 to the sixth lens E6 are all aspherical surfaces. Table 12 below lists the high-order coefficients A4, A6, A8, A9, A10, A11, A12, A13, A14, A15, A16, A17, A18, A19, A20, A21, A22, A23, A24, A25, A26, A27, A28, A29, A30, A31, A32, A33, A34, A35, A36, A37, A38, A39, A40, A41, A42, A43, A44, A45, A46, A47, A48, A49, A50, A51, A52, A53, A54, A55, A56, A57, A58 10 、A 12 、A 14 、A 16 、A 18 and A 20 .

[0141]

[0142]

[0143] Table 12

[0144] Figure 12A The axial chromatic aberration curve of the optical imaging lens of Example 6 is shown, which indicates the deviation of the focal point of light of different wavelengths passing through the lens. Figure 12BAstigmatism curves of the optical imaging lens of embodiment 6 are shown, which represent the meridional image curvature and sagittal image curvature. Figure 12C Distortion curves of the optical imaging lens of embodiment 6 are shown, which represent the distortion size values corresponding to different image heights. Figure 12D Relative illumination curves of the optical imaging lens of embodiment 6 are shown, which represent the relative illumination size corresponding to different image heights on the imaging surface in the optical system. According to Figures 12A to 12D It can be known that the optical imaging lens provided in embodiment 6 can achieve good imaging quality.

[0145] Example 7

[0146] The following refers to Figures 13 to 14D An optical imaging lens according to embodiment 7 of the present application is described. Figure 13 A structure schematic diagram of the optical imaging lens according to embodiment 7 of the present application is shown.

[0147] As Figure 13 shown, the optical imaging lens sequentially comprises, along the optical axis from the object side to the image side: a first lens E1, a stop STO, a second lens E2, a third lens E3, a fourth lens E4, a fifth lens E5, a sixth lens E6, a filter E7, and an imaging surface S15.

[0148] 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 positive refractive power, the object side surface S3 is a concave surface, and the image side surface S4 is a convex 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 positive refractive power, the object side surface S7 is a convex surface, and the image side surface S8 is a concave surface. The fifth lens E5 has positive refractive power, the object side surface S9 is a concave surface, and the image side surface S10 is a convex surface. The sixth lens E6 has positive refractive power, the object side surface S11 is a convex surface, and the image side surface S12 is a concave surface. The filter E7 has an object side surface S13 and an image side surface S14. Light from an object sequentially passes through each surface S1 to S14 and is finally imaged on the imaging surface S15.

[0149] In the present embodiment, the total effective focal length f of the optical imaging lens is 3.62 mm, the distance TTL on the optical axis from the object side surface S1 of the first lens E1 to the imaging surface S15 is 5.87 mm, the half diagonal length of the effective pixel area on the imaging surface S15 is ImgH = 2.90 mm, the maximum half field angle Semi-FOV of the optical imaging lens is 38.0°, and the F number Fno of the optical imaging lens is 1.11.

[0150] Table 13 shows the basic parameter table of the optical imaging lens of embodiment 7, wherein the units of the curvature radius, the thickness / distance, and the focal length are all millimeters (mm).

[0151]

[0152]

[0153] Table 13

[0154] In Example 7, the object side surface and the image side surface of any lens from the first lens E1 to the sixth lens E6 are all aspherical surfaces. Table 14 below lists the high-order coefficients A4, A6, A8, A9, A10, A11, A12, A13, A14, A15, A16, A17, A18, A19, A20, A21, A22, A23, A24, A25, A26, A27, A28, A29, A30, A31, A32, A33, A34, A35, A36, A37, A38, A39, A40, A41, A42, A43, A44, A45, A46, A47, A48, A49, A50, A51, A52, A53, A54, A55, A56, A57, A58 10 、A 12 、A 14 、A 16 、A 18 and A 20 .

[0155] Face No. A4 A6 A8 A10 A12 A14 A16 A18 A20 S1 2.2271E-02 -1.9342E-02 1.8784E-02 -1.9651E-02 1.2154E-02 -4.6694E-03 9.6730E-04 -7.9661E-05 0.0000E+00 S2 2.8918E-02 -9.3234E-02 1.3910E-01 -1.6075E-01 1.1119E-01 -4.5198E-02 1.0628E-02 -1.3321E-03 6.8372E-05 S3 9.4044E-02 -1.5585E-01 1.9145E-01 -1.7984E-01 1.1095E-01 -3.9777E-02 7.4610E-03 -5.6143E-04 0.0000E+00 S4 -4.2847E-02 1.1031E-01 -1.2562E-01 6.1611E-02 9.4441E-03 -2.6612E-02 1.3349E-02 -3.0599E-03 2.8278E-04 S5 8.0666E-02 -8.8287E-02 7.8213E-02 -7.0186E-02 4.1927E-02 -1.5370E-02 2.8072E-03 -8.8747E-05 -2.3894E-05 S6 -1.0075E-01 3.7461E-02 -2.6086E-02 5.8795E-03 -5.0169E-03 5.6835E-03 -3.2651E-03 9.2069E-04 -1.0221E-04 S7 -2.8230E-02 -2.7481E-02 3.5247E-02 -6.5300E-02 7.3983E-02 -5.0766E-02 1.9976E-02 -4.0563E-03 3.2750E-04 S8 -8.7345E-03 -4.1309E-02 2.3577E-02 -1.5167E-02 4.2548E-03 1.4054E-03 -1.0984E-03 2.3618E-04 -1.7939E-05 S9 2.1391E-01 -3.8895E-01 5.3383E-01 -5.2661E-01 3.4377E-01 -1.4026E-01 3.4346E-02 -4.6335E-03 2.6568E-04 S10 9.5774E-02 -3.0934E-01 8.5505E-01 -1.6973E+00 2.3682E+00 -2.3401E+00 1.6568E+00 -8.4617E-01 3.1166E-01 S11 -7.6630E-02 3.5632E-02 -1.3063E-02 3.4696E-03 -6.5637E-04 8.7196E-05 -7.6315E-06 3.8825E-07 -8.5825E-09 S12 -1.0210E-01 5.2216E-02 -2.1147E-02 6.2066E-03 -1.2622E-03 1.7073E-04 -1.4491E-05 6.9298E-07 -1.4170E-08

[0156] Table 14

[0157] Figure 14A The axial chromatic aberration curve of the optical imaging lens of Example 7 is shown, which indicates the deviation of the focal point of light of different wavelengths passing through the lens. Figure 14B The astigmatism curve of the optical imaging lens of Example 7 is shown, which represents the meridional field curvature and the sagittal field curvature. Figure 14C The distortion curve of the optical imaging lens of Example 7 is shown, which represents the distortion magnitude values ​​corresponding to different image heights. Figure 14D The relative illumination curve of the optical imaging lens of Example 7 is shown, which represents the relative illumination corresponding to different image heights on the imaging surface of the optical system. Figures 14A to 14D It can be seen that the optical imaging lens provided in Example 7 can achieve good imaging quality.

[0158] In summary, Examples 1 to 7 respectively satisfy the relationships shown in Table 15.

[0159] Conditional Expression\Example 1 2 3 4 5 6 7 f / EPD 1.12 1.11 1.12 1.11 1.13 1.12 1.11 f1 / f 5.94 3.70 4.87 4.87 5.19 5.00 3.80 f3 / f 3.35 3.27 2.73 3.01 2.97 2.72 2.85 CT4 / ET4 2.60 1.13 2.47 2.01 1.31 1.72 1.53 (R9+R10) / R9 2.14 1.62 2.24 2.14 2.16 2.17 1.98 f3 / R11 7.84 7.73 6.38 6.38 7.55 5.62 6.37 ∑T / ∑H 0.44 0.41 0.50 0.46 0.49 0.57 0.55 SAG42 / SAG51 0.94 1.73 0.88 0.78 1.42 0.75 0.70 |SAG41 / CT4| 0.58 0.56 0.47 0.81 0.94 0.61 0.76 TTL / EPD 1.86 1.88 1.89 1.91 1.85 1.95 1.81 R1 / R2 0.87 0.69 0.81 0.85 0.85 0.78 0.76

[0160] Table 15

[0161] The above description is merely a preferred embodiment of the present application and an illustration of the technical principles employed. Those skilled in the art should understand that the scope of the invention herein is not limited to the technical solutions formed by the specific combination of the above-mentioned technical features, but also encompasses other technical solutions formed by any combination of the above-mentioned technical features or their equivalents without departing from the inventive concept. For example, a technical solution formed by replacing the above-mentioned features with (but not limited to) technical features having similar functions disclosed in this application.

Claims

1. An optical imaging lens, characterized in that: Along the optical axis from the object side to the image side, they include: The first lens has positive refractive power, its object-side surface is convex and its image-side surface is concave; a second lens having optical power; The third lens has positive optical power, its object-side surface is convex and its image-side surface is concave; a fourth lens having optical power; a fifth lens element having optical power, the object-side surface of which is concave and the image-side surface of which is convex; and a sixth lens element having positive optical power, whose object-side surface is convex and whose image-side surface is concave; The fourth lens has positive optical power; or the fourth lens has negative optical power, the second lens has negative optical power, and the fifth lens has positive optical power; The number of lenses having optical power in the optical imaging lens is six; 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 the entrance pupil diameter EPD of the optical imaging lens meet the following conditions: 1.80 <TTL / EPD≤1.95; The effective focal length f3 of the third lens and the total effective focal length f of the optical imaging lens satisfy the following: 2.72≤f3 / f≤3.

35.

2. The optical imaging lens according to claim 1, wherein: The effective focal length f1 of the first lens and the total effective focal length f of the optical imaging lens satisfy: 3.70≤f1 / f≤5.

94.

3. The optical imaging lens according to claim 1, wherein: The center thickness CT4 of the fourth lens on the optical axis and the edge thickness ET4 of the fourth lens satisfy: 1.13≤CT4 / ET4≤2.

6.

4. The optical imaging lens according to claim 1, wherein: The curvature radius R9 of the object-side surface of the fifth lens and the curvature radius R10 of the image-side surface of the fifth lens satisfy: 1.62≤(R9+R10) / R9≤2.

24.

5. The optical imaging lens according to claim 1, wherein: The effective focal length f3 of the third lens and the curvature radius R11 of the object side surface of the sixth lens satisfy: 5.62≤f3 / R11≤7.

84.

6. The optical imaging lens according to claim 1, wherein: The sum of the distances ΣT between any two adjacent lenses from the first lens to the sixth lens on the optical axis and the sum of the center thicknesses ΣH of the first lens to the sixth lens on the optical axis satisfy: 0.4<ΣT / ΣH<0.

6.

7. The optical imaging lens according to claim 1, wherein: An axial distance SAG42 from the intersection of the image-side surface of the fourth lens and the optical axis to the vertex of the effective radius of the image-side surface of the fourth lens and an axial distance SAG51 from the intersection of the object-side surface of the fifth lens and the optical axis to the vertex of the effective radius of the object-side surface of the fifth lens satisfy: 0.7≤SAG42 / SAG51≤1.

73.

8. The optical imaging lens according to claim 1, wherein: The on-axis distance SAG41 from the intersection of the object-side surface of the fourth lens and the optical axis to the vertex of the effective radius of the object-side surface of the fourth lens and the center thickness CT4 of the fourth lens on the optical axis satisfy: 0.5<|SAG41 / CT4|≤0.

94.

9. The optical imaging lens according to claim 1, wherein: The curvature radius R1 of the object-side surface of the first lens and the curvature radius R2 of the image-side surface of the first lens satisfy: 0.69≤R1 / R2<0.

9.

10. The optical imaging lens according to claim 1, wherein: The working band of the optical imaging lens is the near-infrared band of 900nm~1000nm.

11. The optical imaging lens according to claim 10, wherein: The total effective focal length f of the optical imaging lens and the entrance pupil diameter EPD of the optical imaging lens satisfy: 1.11≤f / EPD≤1.13.

Images