Optical imaging lens

Abstract

The present application discloses an optical imaging lens, which includes, in order from the object side to the image side along the optical axis: a first lens with optical power, whose image side surface is concave; a second lens with negative optical power, whose object side surface is concave and whose image side surface is concave; a third lens with negative optical power; a fourth lens with positive optical power, whose object side surface is concave and whose image side surface is convex; and a fifth lens with optical power. 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≤2.08; the air interval T23 between the second lens and the third lens on the optical axis, the air interval T34 between the third lens and the fourth lens on the optical axis, and the air interval T45 between the fourth lens and the fifth lens on the optical axis satisfy: 1.16≤T45 / (T23+T34)<3; and the maximum effective semi-aperture DT21 of the object side surface of the second lens and the maximum effective semi-aperture DT31 of the object side surface of the third lens satisfy: DT31 / DT21≤0.90.

Description

Technical Field

[0001] The present application relates to the field of optical elements, and in particular to an optical imaging lens comprising five lenses. Background Art

[0002] In recent years, with the continuous development of camera module technology and the market trend of ultra-thin mobile phones, users have higher and higher requirements for the imaging quality of optical imaging lenses used in mobile phones. In order to meet the above needs, mobile phone lenses are composed of more and more lenses, such as 6 lenses or 7 lenses. However, too many lenses will cause the price of mobile phone lenses to rise, and the structure of multiple lenses will also result in insufficient adjustment space in the subsequent assembly process. Therefore, for some optical imaging lens manufacturers, they need to follow the mainstream trend to produce optical imaging lenses for mobile phones with large image surface, large aperture and ultra-thin characteristics, and they also need to pursue a higher cost performance.

[0003] Therefore, how to make the optical imaging lens ultra-thin, large aperture, large image surface, large aperture and have high imaging quality even in dim environments is one of the difficult problems that many optical imaging lens designers urgently need to solve. Summary of the invention

[0004] The present application provides an optical imaging lens applicable to portable electronic products, which can at least solve or partially solve at least one of the above-mentioned shortcomings in the prior art, such as an optical imaging lens with an ultra-thin and large image surface.

[0005] One aspect of the present application provides an optical imaging lens, which may include, in order from the object side to the image side along the optical axis: a first lens having optical power, whose image side surface is concave; a second lens having negative optical power, whose object side surface is concave and whose image side surface is concave; a third lens having negative optical power; a fourth lens having positive optical power, whose object side surface is concave and whose image side surface is convex; and a fifth lens having optical power, wherein a total effective focal length f of the optical imaging lens and an entrance pupil diameter EPD of the optical imaging lens satisfy: f / EPD≤2.08; an air interval T23 on the optical axis between the second lens and the third lens, an air interval T34 on the optical axis between the third lens and the fourth lens, and an air interval T45 on the optical axis between the fourth lens and the fifth lens satisfy: 1.16≤T45 / (T23+T34)<3; and a maximum effective semi-aperture DT21 of the object side surface of the second lens and a maximum effective semi-aperture DT31 of the object side surface of the third lens satisfy: DT31 / DT21≤0.90.

[0006] In one embodiment, the effective focal length f1 of the first lens, the effective focal length f2 of the second lens, and the total effective focal length f of the optical imaging lens may satisfy: -1.6<(f1+f2) / f<-1.

[0007] In one embodiment, the total effective focal length f of the optical imaging lens and the curvature radius R2 of the image-side surface of the first lens may satisfy: 1<R2 / f<3.

[0008] In one embodiment, a curvature radius R7 of the object-side surface of the fourth lens, a curvature radius R8 of the image-side surface of the fourth lens, and an effective focal length f4 of the fourth lens may satisfy: -1.1<(R7+R8) / f4<-0.5.

[0009] In one embodiment, a curvature radius R3 of the object-side surface of the second lens and a curvature radius R4 of the image-side surface of the second lens may satisfy: 0<(R3+R4) / (R3-R4)<1.1.

[0010] In one embodiment, a center thickness CT1 of the first lens on the optical axis, a center thickness CT2 of the second lens on the optical axis, and a center thickness CT3 of the third lens on the optical axis may satisfy: 1<CT1 / (CT2+CT3)<1.5.

[0011] In one embodiment, the on-axis 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 and the on-axis distance SAG52 from the intersection of the image side surface of the fifth lens and the optical axis to the effective radius vertex of the image side surface of the fifth lens may satisfy: 0.9<SAG51 / SAG52≤1.35.

[0012] In one embodiment, the maximum effective half-aperture DT22 of the image-side surface of the second lens and the maximum effective half-aperture DT31 of the object-side surface of the third lens may satisfy: DT22 / DT31≤1.

[0013] In one embodiment, a center thickness CT3 of the third lens on the optical axis and a center thickness CT4 of the fourth lens on the optical axis may satisfy: 0.3<CT3 / CT4<0.5.

[0014] In one implementation, a center thickness CT4 of the fourth lens on the optical axis and an edge thickness ET4 of the fourth lens may satisfy: 0.4<ET4 / CT4<0.85.

[0015] In one embodiment, the maximum effective half-aperture DT41 of the object-side surface of the fourth lens and the maximum effective half-aperture DT42 of the image-side surface of the fourth lens may satisfy: 0.6<DT41 / DT42≤1.02.

[0016] Another aspect of the present application provides such an optical imaging lens, which may include, in order from the object side to the image side along the optical axis: a first lens with optical power, whose image side surface is a concave surface; a second lens with negative optical power, whose object side surface is a concave surface and whose image side surface is a concave surface; a third lens with negative optical power; a fourth lens with positive optical power, whose object side surface is a concave surface and whose image side surface is a convex surface; and a fifth lens with optical power, wherein the effective focal length f1 of the first lens, the effective focal length f2 of the second lens and the effective focal length f3 of the optical imaging lens are The total effective focal length f may satisfy: -1.6<(f1+f2) / f<-1; the air interval T23 on the optical axis between the second lens and the third lens, the air interval T34 on the optical axis between the third lens and the fourth lens, and the air interval T45 on the optical axis between the fourth lens and the fifth lens satisfy: 1.16≤T45 / (T23+T34)<3; and the maximum effective semi-aperture DT21 of the object side surface of the second lens and the maximum effective semi-aperture DT31 of the object side surface of the third lens satisfy: DT31 / DT21≤0.90.

[0017] In one embodiment, the total effective focal length f of the optical imaging lens and the curvature radius R2 of the image-side surface of the first lens may satisfy: 1<R2 / f<3.

[0018] 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≤2.08.

[0019] In one embodiment, a curvature radius R7 of the object-side surface of the fourth lens, a curvature radius R8 of the image-side surface of the fourth lens, and an effective focal length f4 of the fourth lens may satisfy: -1.1<(R7+R8) / f4<-0.5.

[0020] In one embodiment, a curvature radius R3 of the object-side surface of the second lens and a curvature radius R4 of the image-side surface of the second lens may satisfy: 0<(R3+R4) / (R3-R4)<1.1.

[0021] In one embodiment, a center thickness CT1 of the first lens on the optical axis, a center thickness CT2 of the second lens on the optical axis, and a center thickness CT3 of the third lens on the optical axis may satisfy: 1<CT1 / (CT2+CT3)<1.5.

[0022] In one embodiment, the on-axis 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 and the on-axis distance SAG52 from the intersection of the image side surface of the fifth lens and the optical axis to the effective radius vertex of the image side surface of the fifth lens may satisfy: 0.9<SAG51 / SAG52≤1.35.

[0023] In one embodiment, the maximum effective half-aperture DT22 of the image-side surface of the second lens and the maximum effective half-aperture DT31 of the object-side surface of the third lens may satisfy: DT22 / DT31≤1.

[0024] In one embodiment, a center thickness CT3 of the third lens on the optical axis and a center thickness CT4 of the fourth lens on the optical axis may satisfy: 0.3<CT3 / CT4<0.5.

[0025] In one implementation, a center thickness CT4 of the fourth lens on the optical axis and an edge thickness ET4 of the fourth lens may satisfy: 0.4<ET4 / CT4<0.85.

[0026] In one embodiment, the maximum effective half-aperture DT41 of the object-side surface of the fourth lens and the maximum effective half-aperture DT42 of the image-side surface of the fourth lens may satisfy: 0.6<DT41 / DT42≤1.02.

[0027] The optical imaging lens provided in the present application uses multiple lenses, such as the first lens to the fifth lens. By reasonably controlling the optical focal length, surface shape, curvature radius and effective focal length of each lens of the optical imaging system, the optical imaging lens is ultra-thin while having the characteristics of large image surface, high image quality, low cost, large aperture, etc. At the same time, each lens has a compact structure and good molding and processing performance, which can improve the production yield of the camera module. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Other features, purposes and advantages of the present application will become more apparent through the following detailed description of non-limiting embodiments in conjunction with the accompanying drawings. In the accompanying drawings:

[0029] Figure 1 A schematic structural diagram of an optical imaging lens according to Embodiment 1 of the present application is shown;

[0030] FIG. 2A to FIG. 2D The axial chromatic aberration curve, astigmatism curve, distortion curve and magnification chromatic aberration curve of the optical imaging lens of Example 1 are respectively shown;

[0031] Figure 3 A schematic structural diagram of an optical imaging lens according to Embodiment 2 of the present application is shown;

[0032] FIG. 4A to FIG. 4D The axial chromatic aberration curve, astigmatism curve, distortion curve and magnification chromatic aberration curve of the optical imaging lens of Example 2 are respectively shown;

[0033] Figure 5 A schematic structural diagram of an optical imaging lens according to Embodiment 3 of the present application is shown;

[0034] FIG. 6A to FIG. 6DThe axial chromatic aberration curve, astigmatism curve, distortion curve and magnification chromatic aberration curve of the optical imaging lens of Example 3 are respectively shown;

[0035] Figure 7 A schematic structural diagram of an optical imaging lens according to Embodiment 4 of the present application is shown;

[0036] FIG. 8A to FIG. 8D The axial chromatic aberration curve, astigmatism curve, distortion curve and magnification chromatic aberration curve of the optical imaging lens of Example 4 are respectively shown;

[0037] Fig. 9 shows a schematic structural diagram of an optical imaging lens according to Embodiment 5 of the present application; and

[0038] FIG. 10A to FIG. 10D The axial chromatic aberration curve, astigmatism curve, distortion curve and magnification chromatic aberration curve of the optical imaging lens of Example 5 are respectively shown. DETAILED DESCRIPTION

[0039] In order to better understand the present application, a more detailed description will be made of various aspects of the present application with reference to the accompanying drawings. It should be understood that these detailed descriptions are only 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.

[0040] It should be noted that in this specification, the expressions of first, second, third, etc. are only used to distinguish one feature from another feature, and do not represent any limitation on the features. Therefore, without departing from the teaching of the present application, the first lens discussed below may also be referred to as the second lens or the third lens.

[0041] In the drawings, the thickness, size and shape of the lenses have been slightly exaggerated for ease of explanation. Specifically, the shapes of the spherical or aspherical surfaces shown in the drawings are shown by way of example. That is, the shapes of the spherical or aspherical surfaces are not limited to the shapes of the spherical or aspherical surfaces shown in the drawings. The drawings are only examples and are not drawn strictly to scale.

[0042] In this article, the paraxial region refers to the region near the optical axis. If the lens surface is convex and the position of the convex surface is not defined, it means that the lens surface is convex at least in the paraxial region; if the lens surface is concave and the position of the concave surface is not defined, it means that the lens surface is concave at least in the paraxial region. The surface of each lens closest to the object is called the object side of the lens, and the surface of each lens closest to the imaging plane is called the image side of the lens.

[0043] 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 exclude 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 listed 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.

[0044] Unless otherwise defined, all terms (including technical terms and scientific terms) used in this article have the same meaning as commonly understood by ordinary technicians in the field to which this application belongs. It should also be understood that terms (such as terms defined in commonly used dictionaries) should be interpreted as having the same meaning as their meaning in the context of the relevant technology, and will not be interpreted in an idealized or overly formal sense unless explicitly defined in this article.

[0045] It should be noted that, in the absence of conflict, the embodiments and features in the embodiments of the present application can be combined with each other. The present application will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0046] The features, principles and other aspects of the present application are described in detail below.

[0047] The optical imaging lens according to the exemplary embodiment of the present application may include five lenses with optical power, namely, a first lens, a second lens, a third lens, a fourth lens and a fifth lens. The five lenses are arranged in sequence from the object side to the image side along the optical axis. In the first lens to the fifth lens, each adjacent two lenses may have an air gap between them.

[0048] In an exemplary embodiment, the first lens has positive or negative power, and its image side surface is concave; the second lens may have negative power, its object side surface is concave, and its image side surface is concave; the third lens may have negative power; the fourth lens may have positive power, its object side surface is concave, and its image side surface is convex; and the fifth lens has positive power or negative power. Among them, the surface shape and power of each lens are reasonably configured, so that it can have the characteristics of high pixel, large aperture, and easy processing while ensuring the performance of the optical system.

[0049] In example embodiments, the object-side surface of the first lens may be a convex surface.

[0050] In example embodiments, the image-side surface of the fifth lens may be a concave surface.

[0051] In an exemplary 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≤2.08. For example, 1.5<f / EPD≤2.08. By controlling the ratio of the total effective focal length of the optical imaging lens to the entrance pupil diameter of the optical imaging lens within a reasonable numerical range, it is beneficial for the optical imaging lens to obtain a larger aperture and increase the amount of light entering the optical imaging system.

[0052] In an exemplary embodiment, the air interval T23 between the second lens and the third lens on the optical axis, the air interval T34 between the third lens and the fourth lens on the optical axis, and the air interval T45 between the fourth lens and the fifth lens on the optical axis satisfy: 1.16≤T45 / (T23+T34)<3. For example, 1.7<T45 / (T23+T34)<2.5. Reasonable control of the relationship between the air interval T34 between the third lens and the fourth lens on the optical axis and the air interval T45 between the fourth lens and the fifth lens on the optical axis is conducive to reducing the sensitivity of the air interval to the tolerance in the optical imaging system, improving the manufacturing yield of the optical imaging lens, and controlling the stability of the field curvature of the optical imaging lens.

[0053] In an exemplary embodiment, the maximum effective semi-aperture DT21 of the object side surface of the second lens and the maximum effective semi-aperture DT31 of the object side surface of the third lens satisfy: DT31 / DT21≤0.90. For example, 0.7<DT31 / DT21≤0.90. By controlling the ratio of the maximum effective semi-aperture of the object side surface of the second lens to the object side surface of the third lens within a reasonable numerical range, it is beneficial to reduce the off-axis aberration of the optical imaging system and improve the imaging quality of the optical imaging lens.

[0054] In an exemplary embodiment, the effective focal length f1 of the first lens, the effective focal length f2 of the second lens, and the total effective focal length f of the optical imaging lens may satisfy: -1.6<(f1+f2) / f<-1. For example, -1.5<(f1+f2) / f<-1.2. Reasonable control of the relationship between the effective focal length of the first lens, the effective focal length of the second lens, and the total effective focal length of the optical imaging lens is conducive to correcting the axial chromatic aberration of the optical imaging system and improving the resolution of the optical imaging system.

[0055] In an exemplary embodiment, the total effective focal length f of the optical imaging lens and the curvature radius R2 of the image side surface of the first lens may satisfy: 1<R2 / f<3. For example, 1.5<R2 / f<3. By controlling the ratio of the total effective focal length of the optical imaging lens to the curvature radius of the image side surface of the first lens within a reasonable numerical range, it is beneficial to improve the processability of the first lens and reduce the sensitivity of the first air space to the back focus.

[0056] In an exemplary embodiment, the radius of curvature R7 of the object side surface of the fourth lens, the radius of curvature R8 of the image side surface of the fourth lens, and the effective focal length f4 of the fourth lens may satisfy: -1.1<(R7+R8) / f4<-0.5. Reasonable control of the relationship between the radius of curvature of the object side surface of the fourth lens, the radius of curvature of the image side surface, and the effective focal length can effectively control the astigmatism value of the object-image surface and the image side surface of the fourth lens, thereby effectively and reasonably controlling the imaging quality within the aperture band of the central field of view of the optical imaging lens.

[0057] In an exemplary embodiment, the curvature radius R3 of the object side surface of the second lens and the curvature radius R4 of the image side surface of the second lens may satisfy: 0<(R3+R4) / (R3-R4)<1.1. For example, 0.5<(R3+R4) / (R3-R4)<1.1. By controlling the ratio of the curvature radius of the object side surface and the image side surface of the second lens within a reasonable numerical range, it is beneficial to correct the spherical aberration and axial chromatic aberration of the optical imaging system, and improve the imaging quality of the optical imaging lens.

[0058] In an exemplary embodiment, the center thickness CT1 of the first lens on the optical axis, the center thickness CT2 of the second lens on the optical axis, and the center thickness CT3 of the third lens on the optical axis may satisfy: 1<CT1 / (CT2+CT3)<1.5. For example, 1.1<CT1 / (CT2+CT3)<1.4. Reasonable control of the relationship between the center thicknesses of the first lens, the second lens, and the third lens on the optical axis is conducive to ensuring the compactness of the structure of the optical imaging system, while reducing the sensitivity of the center thickness of each lens in the optical imaging lens to the field curvature, which is conducive to improving the assembly yield of the optical imaging lens.

[0059] In an exemplary embodiment, 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 and the axial distance SAG52 from the intersection of the image side surface of the fifth lens and the optical axis to the effective radius vertex of the image side surface of the fifth lens can satisfy: 0.9<SAG51 / SAG52≤1.35. By controlling the ratio of the sagittal height of the object side surface and the image side surface of the fifth lens within a reasonable numerical range, it is beneficial to make the surface transition of the fifth lens smooth, and meet the processability and manufacturability of the fifth lens.

[0060] In an exemplary embodiment, the maximum effective semi-aperture DT22 of the image side surface of the second lens and the maximum effective semi-aperture DT31 of the object side surface of the third lens may satisfy: DT22 / DT31≤1. For example, 0.5<DT22 / DT31≤1. By controlling the ratio of the maximum effective semi-aperture of the image side surface of the second lens to the object side surface of the third lens within a reasonable numerical range, it is helpful to improve the relative brightness of the edge field of view of the optical imaging lens, thereby better matching the photosensitive chip.

[0061] In an exemplary embodiment, the center thickness CT3 of the third lens on the optical axis and the center thickness CT4 of the fourth lens on the optical axis may satisfy: 0.3<CT3 / CT4<0.5. By controlling the ratio of the center thickness of the third lens to the center thickness of the fourth lens on the optical axis within a reasonable numerical range, the field curvature of the optical imaging lens can be effectively corrected while ensuring the processability of the optical imaging lens.

[0062] In an exemplary embodiment, the center thickness CT4 of the fourth lens on the optical axis and the edge thickness ET4 of the fourth lens may satisfy: 0.4<ET4 / CT4<0.85. By controlling the ratio of the center thickness to the edge thickness of the fourth lens on the optical axis within a reasonable numerical range, it is beneficial to satisfy the processability of the fourth lens and to correct the field curvature and distortion of the optical imaging system.

[0063] In an exemplary embodiment, the maximum effective semi-aperture DT41 of the object side surface of the fourth lens and the maximum effective semi-aperture DT42 of the image side surface of the fourth lens may satisfy: 0.6<DT41 / DT42≤1.02. By controlling the ratio of the maximum effective semi-aperture of the object side surface to the image side surface of the fourth lens within a reasonable numerical range, the fourth lens can be prevented from being excessively bent, the difficulty of processing can be reduced, and it is also beneficial to increase the matching degree between the chief ray incident angle (Chief-Ray-Angle, CRA) of the optical imaging lens and the photosensitive chip.

[0064] In an exemplary embodiment, the optical imaging lens may further include an aperture. The aperture may be disposed at an appropriate position as required. For example, the aperture may be disposed between the object side and the first lens. Optionally, the optical imaging lens may further include a filter for correcting color deviation and / or a protective glass for protecting a photosensitive element located on the imaging surface.

[0065] The present application proposes an optical imaging lens with characteristics such as ultra-thinness and large image surface. The optical imaging lens according to the above-mentioned embodiment of the present application can use multiple lenses, such as the five lenses mentioned above. By reasonably allocating the focal length, surface shape, center thickness of each lens, and axial spacing between each lens, etc., the incident light can be effectively converged, the total optical length of the imaging lens can be reduced, and the processability of the imaging lens can be improved, making the optical imaging lens more conducive to production and processing.

[0066] In an exemplary embodiment, at least one of the mirror surfaces of each lens is an aspherical mirror surface, that is, at least one of the mirror surfaces from the object side of the first lens to the image side of the fifth lens is an aspherical mirror surface. The characteristic of an aspherical lens is that the curvature changes continuously 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 aspherical lens has a better curvature radius characteristic, and has the advantages of improving distortion aberration and improving astigmatism aberration. After adopting an aspherical lens, the aberration occurring during imaging can be eliminated as much as possible, thereby improving the imaging quality. Optionally, at least one of the object side and image side of each lens in the first lens, the second lens, the third lens, the fourth lens and the fifth lens is an aspherical mirror surface. Optionally, the object side and image side of each lens in the first lens, the second lens, the third lens, the fourth lens and the fifth lens are all aspherical mirror surfaces.

[0067] The present application also provides an imaging device, whose electronic photosensitive element can be a photosensitive coupled device (CCD) or a complementary metal oxide semiconductor element (CMOS). The imaging device can be an independent imaging device such as a digital camera, or an imaging module integrated in a mobile electronic device such as a mobile phone. The imaging device is equipped with the optical imaging lens described above.

[0068] However, those skilled in the art should understand that, without departing from the technical solution claimed in the present application, the number of lenses constituting the optical imaging lens can be changed to obtain the various results and advantages described in this specification. For example, although five lenses are described as an example in the embodiments, the optical imaging lens is not limited to including five lenses. If necessary, the optical imaging lens may also include other numbers of lenses.

[0069] Specific embodiments of the optical imaging lens applicable to the above-mentioned embodiments are further described below with reference to the accompanying drawings.

[0070] Example 1

[0071] The following reference Figures 1 to 2D An optical imaging lens according to Embodiment 1 of the present application is described. Figure 1 is a schematic diagram showing the structure of an optical imaging lens according to Example 1 of the present application.

[0072] like Figure 1 As shown, the optical imaging lens includes, in order from the object side to the image side along the optical axis: an aperture STO, a first lens E1, a second lens E2, a third lens E3, a fourth lens E4, a fifth lens E5, a filter E6 and an imaging surface S13.

[0073] The first lens E1 has positive focal power, and its object side surface S1 is convex, and its image side surface S2 is concave. The second lens E2 has negative focal power, and its object side surface S3 is concave, and its image side surface S4 is concave. The third lens E3 has negative focal power, and its object side surface S5 is convex, and its image side surface S6 is concave. The fourth lens E4 has positive focal power, and its object side surface S7 is concave, and its image side surface S8 is convex. The fifth lens E5 has negative focal power, and its object side surface S9 is convex, and its image side surface S10 is concave. The filter E6 has an object side surface S11 and an image side surface S12. The light from the object passes through each surface S1 to S12 in sequence and is finally imaged on the imaging surface S13.

[0074] Table 1 shows the basic parameters of the optical imaging lens of Example 1, wherein the units of the radius of curvature, thickness / distance and focal length are all millimeters (mm).

[0075]

[0076]

[0077] Table 1

[0078] In this embodiment, the total effective focal length of the optical imaging lens is f=3.80 mm, the distance TTL on the optical axis from the object-side surface S1 of the first lens E1 to the imaging surface S13 is 3.40 mm, half of the diagonal length of the effective pixel area on the imaging surface S13 is ImgH=4.34 mm, and the maximum half field of view Semi-FOV of the optical imaging lens is 40.86°.

[0079] In Example 1, the object side surface and the image side surface of any lens among the first lens E1 to the fifth lens E5 are both aspherical surfaces, and the surface shape x of each aspherical lens can be defined by but not limited to the following aspherical surface formula:

[0080]

[0081] Wherein, x is the distance vector height from the vertex of the aspheric surface when the aspheric surface is 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 cone coefficient; Ai is the correction coefficient of the i-th order of the aspheric surface. Table 2 below gives 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 .

[0082] Face number A4 A6 A8 A10 A12 A14 A16 A18 A20 S1 2.2993E-02 1.7955E-02 3.7445E-02 -4.2462E-01 1.7891E+00 -4.1311E+00 5.3973E+00 -3.7942E+00 1.0843E+00 S2 -9.8772E-02 5.8070E-02 -1.2116E-01 1.1884E+00 -4.4964E+00 7.6346E+00 -5.7469E+00 7.8964E-01 7.7372E-01 S3 -7.3613E-02 8.6522E-02 1.3346E+00 -7.7286E+00 2.5817E+01 -5.5058E+01 7.2650E+01 -5.3450E+01 1.6763E+01 S4 -2.1790E-02 5.3304E-01 -3.3749E+00 2.1770E+01 -8.7974E+01 2.1888E+02 -3.2619E+02 2.6763E+02 -9.2402E+01 S5 -3.1220E-01 5.5047E-01 -5.5229E+00 3.4644E+01 -1.3797E+02 3.4330E+02 -5.1951E+02 4.3747E+02 -1.5750E+02 S6 -2.6406E-01 3.6711E-01 -2.0434E+00 8.0064E+00 -1.9563E+01 3.0803E+01 -3.0126E+01 1.6498E+01 -3.8242E+00 S7 -1.7197E-01 1.3165E-01 -1.0661E-01 -2.4763E-02 1.4823E+00 -3.2928E+00 3.0042E+00 -1.2789E+00 2.1088E-01 S8 -2.6391E-02 4.2767E-02 2.6268E-03 -8.4620E-02 2.6916E-01 -2.9868E-01 1.5465E-01 -3.8763E-02 3.8214E-03 S9 -4.0711E-01 3.6201E-01 -2.1862E-01 9.4374E-02 -2.7371E-02 5.1458E-03 -6.0122E-04 3.9739E-05 -1.1376E-06 S10 -1.7504E-01 1.2467E-01 -6.1975E-02 2.0810E-02 -4.7305E-03 7.0743E-04 -6.5595E-05 3.3918E-06 -7.4659E-08

[0083] Table 2

[0084] Figure 2A The axial chromatic aberration curve of the optical imaging lens of Example 1 is shown, which indicates the deviation of light of different wavelengths from the focal point behind the lens. Figure 2B The astigmatism curve of the optical imaging lens of Example 1 is shown, which represents the meridional image curvature and the sagittal image 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 magnification chromatic aberration curve of the optical imaging lens of Example 1 is shown, which represents the deviation of different image heights on the imaging surface after the light passes through the lens. FIG. 2A to FIG. 2D It can be seen that the optical imaging lens provided in Example 1 can achieve good imaging quality.

[0085] Example 2

[0086] The following reference Figures 3 to 4D An optical imaging lens according to Embodiment 2 of the present application is described. Figure 3 A schematic structural diagram of an optical imaging lens according to Embodiment 2 of the present application is shown.

[0087] like Figure 3 As shown, the optical imaging lens includes, in order from the object side to the image side along the optical axis: an aperture STO, a first lens E1, a second lens E2, a third lens E3, a fourth lens E4, a fifth lens E5, a filter E6 and an imaging surface S13.

[0088] The first lens E1 has positive focal power, and its object side surface S1 is convex, and its image side surface S2 is concave. The second lens E2 has negative focal power, and its object side surface S3 is concave, and its image side surface S4 is concave. The third lens E3 has negative focal power, and its object side surface S5 is concave, and its image side surface S6 is concave. The fourth lens E4 has positive focal power, and its object side surface S7 is concave, and its image side surface S8 is convex. The fifth lens E5 has negative focal power, and its object side surface S9 is convex, and its image side surface S10 is concave. The filter E6 has an object side surface S11 and an image side surface S12. The light from the object passes through each surface S1 to S12 in sequence and is finally imaged on the imaging surface S13.

[0089] In this embodiment, the total effective focal length of the optical imaging lens is f=3.79 mm, the distance TTL on the optical axis from the object-side surface S1 of the first lens E1 to the imaging surface S13 is 3.40 mm, half of the diagonal length of the effective pixel area on the imaging surface S13 is ImgH=4.30 mm, and the maximum half field of view Semi-FOV of the optical imaging lens is 40.86°.

[0090] Table 3 shows the basic parameters of the optical imaging lens of Example 2, wherein the units of the radius of curvature, thickness / distance and focal length are all millimeters (mm).

[0091]

[0092] Table 3

[0093] In Example 2, the object side surface and the image side surface of any lens from the first lens E1 to the fifth lens E5 are both 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, 10 , A 12 , A 14 , A 16 , A 18 and A 20 .

[0094] Face number A4 A6 A8 A10 A12 A14 A16 A18 A20 S1 1.9870E-02 6.1187E-02 -2.1202E-01 4.4080E-01 2.0233E-02 -2.0596E+00 4.1686E+00 -3.5803E+00 1.1403E+00 S2 -9.5093E-02 5.5814E-02 1.5601E-04 2.5266E-01 -1.0429E+00 3.5248E-01 2.8828E+00 -4.3771E+00 1.9286E+00 S3 -7.1479E-02 1.1839E-01 1.1948E+00 -7.3155E+00 2.4522E+01 -5.1481E+01 6.6190E+01 -4.7033E+01 1.4158E+01 S4 -2.1614E-02 5.9031E-01 -4.4696E+00 3.1710E+01 -1.3879E+02 3.7102E+02 -5.9159E+02 5.1781E+02 -1.9094E+02 S5 -3.4870E-01 9.4290E-01 -9.8589E+00 6.3362E+01 -2.5754E+02 6.5704E+02 -1.0219E+03 8.8529E+02 -3.2774E+02 S6 -3.0676E-01 5.8352E-01 -3.3831E+00 1.3397E+01 -3.3350E+01 5.3647E+01 -5.3762E+01 3.0314E+01 -7.2782E+00 S7 -2.0643E-01 2.8614E-01 -7.5096E-01 1.7068E+00 -1.0561E+00 -1.2532E+00 2.1424E+00 -1.1220E+00 2.0733E-01 S8 -6.0288E-02 1.3467E-01 -1.9329E-01 2.0237E-01 8.4913E-02 -2.9079E-01 2.0081E-01 -5.9371E-02 6.6277E-03 S9 -3.9884E-01 3.6077E-01 -2.3342E-01 1.0915E-01 -3.3955E-02 6.7766E-03 -8.3446E-04 5.7845E-05 -1.7305E-06 S10 -1.6414E-01 1.1326E-01 -5.4670E-02 1.7299E-02 -3.5819E-03 4.6496E-04 -3.4243E-05 1.1464E-06 -6.7143E-09

[0095] Table 4

[0096] Figure 4A The axial chromatic aberration curve of the optical imaging lens of Example 2 is shown, which indicates that light of different wavelengths deviates from the focal point behind the lens. Figure 4B The astigmatism curve of the optical imaging lens of Example 2 is shown, which represents the meridional image curvature and the sagittal image curvature. Figure 4C The distortion curve of the optical imaging lens of Example 2 is shown, which represents the distortion magnitude values ​​corresponding to different image heights. Figure 4D The magnification chromatic aberration curve of the optical imaging lens of Example 2 is shown, which represents the deviation of different image heights on the imaging surface after the light passes through the lens. FIG. 4A to FIG. 4D It can be seen that the optical imaging lens provided in Example 2 can achieve good imaging quality.

[0097] Example 3

[0098] The following reference Figures 5 to 6D An optical imaging lens according to Embodiment 3 of the present application is described. Figure 5 A schematic structural diagram of an optical imaging lens according to Embodiment 3 of the present application is shown.

[0099] like Figure 5 As shown, the optical imaging lens includes, in order from the object side to the image side along the optical axis: an aperture STO, a first lens E1, a second lens E2, a third lens E3, a fourth lens E4, a fifth lens E5, a filter E6 and an imaging surface S13.

[0100] The first lens E1 has positive focal power, its object side surface S1 is convex, and the image side surface S2 is concave. The second lens E2 has negative focal power, its object side surface S3 is concave, and the image side surface S4 is concave. The third lens E3 has negative focal power, its object side surface S5 is concave, and the image side surface S6 is convex. The fourth lens E4 has positive focal power, its object side surface S7 is concave, and the image side surface S8 is convex. The fifth lens E5 has negative focal power, its object side surface S9 is concave, and the image side surface S10 is concave. The filter E6 has an object side surface S11 and an image side surface S12. The light from the object passes through each surface S1 to S12 in sequence and is finally imaged on the imaging surface S13.

[0101] In this embodiment, the total effective focal length of the optical imaging lens is f=3.68 mm, the distance TTL on the optical axis from the object-side surface S1 of the first lens E1 to the imaging surface S13 is 3.40 mm, half of the diagonal length of the effective pixel area on the imaging surface S13 is ImgH=4.23 mm, and the maximum half field of view Semi-FOV of the optical imaging lens is 41.63°.

[0102] Table 5 shows the basic parameters of the optical imaging lens of Example 3, wherein the units of the radius of curvature, thickness / distance and focal length are all millimeters (mm).

[0103]

[0104] Table 5

[0105] In Example 3, the object side surface and the image side surface of any lens from the first lens E1 to the fifth lens E5 are both 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 .

[0106] Face number A4 A6 A8 A10 A12 A14 A16 A18 A20 S1 1.8289E-02 1.0779E-01 -5.1701E-01 1.6275E+00 -2.6107E+00 1.1109E+00 2.5421E+00 -3.7883E+00 1.5011E+00 S2 -8.5471E-02 7.0016E-02 -3.6993E-01 2.2404E+00 -6.6423E+00 8.8115E+00 -2.9231E+00 -4.0829E+00 3.0097E+00 S3 -6.1410E-02 9.3017E-02 1.1281E+00 -7.3002E+00 2.7143E+01 -6.3310E+01 8.9667E+01 -6.9581E+01 2.2712E+01 S4 -7.8780E-03 4.9687E-01 -4.1538E+00 3.2199E+01 -1.4989E+02 4.2259E+02 -7.0765E+02 6.4907E+02 -2.5048E+02 S5 -3.1391E-01 7.4271E-01 -9.0371E+00 6.1409E+01 -2.5935E+02 6.8495E+02 -1.1020E+03 9.8784E+02 -3.7863E+02 S6 -2.3577E-01 2.7114E-01 -2.0441E+00 9.4030E+00 -2.5737E+01 4.5197E+01 -4.9062E+01 2.9670E+01 -7.5740E+00 S7 -1.6979E-01 1.5833E-01 -3.4489E-01 6.8005E-01 6.4482E-01 -2.9281E+00 3.0977E+00 -1.4173E+00 2.4580E-01 S8 -3.1462E-02 3.7909E-04 2.0240E-01 -6.1091E-01 1.0938E+00 -1.0231E+00 5.0732E-01 -1.2815E-01 1.3049E-02 S9 -3.5692E-01 3.0021E-01 -1.8918E-01 8.9960E-02 -2.8685E-02 5.8539E-03 -7.3552E-04 5.2023E-05 -1.5914E-06 S10 -1.5541E-01 1.0654E-01 -5.4747E-02 1.9219E-02 -4.6247E-03 7.5041E-04 -7.8752E-05 4.8806E-06 -1.3685E-07

[0107] Table 6

[0108] Fig. 6A The axial chromatic aberration curve of the optical imaging lens of Example 3 is shown, which indicates that light of different wavelengths deviates from the focal point behind the lens. Figure 6B The astigmatism curve of the optical imaging lens of Example 3 is shown, which represents the meridional image curvature and the sagittal image curvature. Figure 6C The distortion curve of the optical imaging lens of Example 3 is shown, which represents the distortion magnitude values ​​corresponding to different image heights. Fig.6DThe magnification chromatic aberration curve of the optical imaging lens of Example 3 is shown, which represents the deviation of different image heights on the imaging surface after the light passes through the lens. FIG. 6A to FIG. 6D It can be seen that the optical imaging lens provided in Example 3 can achieve good imaging quality.

[0109] Example 4

[0110] The following reference Figures 7 to 8D An optical imaging lens according to Embodiment 4 of the present application is described. Figure 7 A schematic structural diagram of an optical imaging lens according to Embodiment 4 of the present application is shown.

[0111] like Figure 7 As shown, the optical imaging lens includes, in order from the object side to the image side along the optical axis: an aperture STO, a first lens E1, a second lens E2, a third lens E3, a fourth lens E4, a fifth lens E5, a filter E6 and an imaging surface S13.

[0112] The first lens E1 has positive focal power, and its object side surface S1 is convex, and its image side surface S2 is concave. The second lens E2 has negative focal power, and its object side surface S3 is concave, and its image side surface S4 is concave. The third lens E3 has negative focal power, and its object side surface S5 is convex, and its image side surface S6 is concave. The fourth lens E4 has positive focal power, and its object side surface S7 is concave, and its image side surface S8 is convex. The fifth lens E5 has negative focal power, and its object side surface S9 is concave, and its image side surface S10 is concave. The filter E6 has an object side surface S11 and an image side surface S12. The light from the object passes through each surface S1 to S12 in sequence and is finally imaged on the imaging surface S13.

[0113] In this embodiment, the total effective focal length of the optical imaging lens is f=3.60 mm, the distance TTL on the optical axis from the object-side surface S1 of the first lens E1 to the imaging surface S13 is 3.40 mm, half of the diagonal length of the effective pixel area on the imaging surface S13 is ImgH=4.20 mm, and the maximum half field of view Semi-FOV of the optical imaging lens is 42.29°.

[0114] Table 7 shows a basic parameter table of the optical imaging lens of Example 4, wherein the units of the radius of curvature, thickness / distance and focal length are all millimeters (mm).

[0115]

[0116]

[0117] Table 7

[0118] In Example 4, the object side surface and the image side surface of any one of the first lens E1 to the fifth lens E5 are aspherical surfaces. Table 8 below lists the high-order coefficients A4, A6, A8, A9, A10, A20, A30, A40, A50, A60, A70, A80, A90, A100, A110, A120, A130, A140, A150, A160, A170, A180, A190, A200, A210, A220, A230, A240, A250, A260, A270, A280, A300, A310, A320, A330, A340, A350, A360, A400, A500, A600, A700, A800, A900, A 10 , A 12 , A 14 , A 16 , A 18 and A 20 .

[0119] Face number A4 A6 A8 A10 A12 A14 A16 A18 A20 S1 1.0795E-02 1.4364E-01 -9.3066E-01 3.8939E+00 -1.0162E+01 1.6161E+01 -1.5048E+01 7.1697E+00 -1.2771E+00 S2 -5.1949E-02 1.3009E-01 -1.2238E+00 7.6609E+00 -2.7982E+01 5.8506E+01 -6.9888E+01 4.4489E+01 -1.1686E+01 S3 6.3192E-03 1.3366E-01 8.3430E-02 -1.1319E+00 4.3143E+00 -1.0640E+01 1.7382E+01 -1.5266E+01 5.4901E+00 S4 2.4960E-02 2.8212E-01 -1.7705E+00 1.2053E+01 -5.3831E+01 1.4854E+02 -2.4327E+02 2.1723E+02 -8.0650E+01 S5 -3.1757E-01 8.9191E-01 -1.0508E+01 6.8000E+01 -2.7661E+02 7.0264E+02 -1.0858E+03 9.3352E+02 -3.4182E+02 S6 -2.1966E-01 3.0039E-01 -2.0883E+00 8.7077E+00 -2.2645E+01 4.0620E+01 -4.7500E+01 3.1341E+01 -8.5958E+00 S7 -2.1929E-01 1.4154E-02 1.8270E+00 -1.0050E+01 3.1709E+01 -5.5049E+01 5.2588E+01 -2.6266E+01 5.4079E+00 S8 -1.5968E-02 -2.0213E-01 1.1364E+00 -2.9743E+00 4.7677E+00 -4.4233E+00 2.3164E+00 -6.3910E-01 7.2458E-02 S9 -3.8644E-01 3.3538E-01 -2.1899E-01 1.0857E-01 -3.6178E-02 7.7121E-03 -1.0103E-03 7.4307E-05 -2.3552E-06 S10 -1.5987E-01 1.1075E-01 -5.8649E-02 2.1324E-02 -5.2862E-03 8.7423E-04 -9.2444E-05 5.7297E-06 -1.6068E-07

[0120] Table 8

[0121] Fig. 8A The axial chromatic aberration curve of the optical imaging lens of Example 4 is shown, which indicates the deviation of light of different wavelengths from the focal point behind the lens. Figure 8B The astigmatism curve of the optical imaging lens of Example 4 is shown, which represents the meridional image curvature and the sagittal image curvature. Figure 8C The distortion curve of the optical imaging lens of Example 4 is shown, which represents the distortion magnitude values ​​corresponding to different image heights. Fig.8D The magnification chromatic aberration curve of the optical imaging lens of Example 4 is shown, which represents the deviation of different image heights on the imaging surface after the light passes through the lens. FIG. 8A to FIG. 8D It can be seen that the optical imaging lens provided in Example 4 can achieve good imaging quality.

[0122] Example 5

[0123] The following reference Figures 9 to 10D An optical imaging lens according to Embodiment 5 of the present application is described. Fig. 9 A schematic structural diagram of an optical imaging lens according to Embodiment 5 of the present application is shown.

[0124] like Fig. 9 As shown, the optical imaging lens includes, in order from the object side to the image side along the optical axis: an aperture STO, a first lens E1, a second lens E2, a third lens E3, a fourth lens E4, a fifth lens E5, a filter E6 and an imaging surface S13.

[0125] The first lens E1 has positive focal power, and its object side surface S1 is convex, and its image side surface S2 is concave. The second lens E2 has negative focal power, and its object side surface S3 is concave, and its image side surface S4 is concave. The third lens E3 has negative focal power, and its object side surface S5 is convex, and its image side surface S6 is concave. The fourth lens E4 has positive focal power, and its object side surface S7 is concave, and its image side surface S8 is convex. The fifth lens E5 has negative focal power, and its object side surface S9 is convex, and its image side surface S10 is concave. The filter E6 has an object side surface S11 and an image side surface S12. The light from the object passes through each surface S1 to S12 in sequence and is finally imaged on the imaging surface S13.

[0126] In this embodiment, the total effective focal length of the optical imaging lens is f=3.80 mm, the distance TTL on the optical axis from the object-side surface S1 of the first lens E1 to the imaging surface S13 is 3.39 mm, half of the diagonal length of the effective pixel area on the imaging surface S13 is ImgH=4.40 mm, and the maximum half field of view Semi-FOV of the optical imaging lens is 40.64°.

[0127] Table 9 shows a basic parameter table of the optical imaging lens of Example 5, wherein the units of the radius of curvature, thickness / distance and focal length are all millimeters (mm).

[0128]

[0129] Table 9

[0130] In Example 5, the object side surface and the image side surface of any lens from the first lens E1 to the fifth lens E5 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 .

[0131] Face number A4 A6 A8 A10 A12 A14 A16 A18 A20 S1 1.4867E-02 5.8693E-02 -2.5151E-01 7.3403E-01 -1.1215E+00 6.1336E-01 4.7859E-01 -8.0411E-01 2.8820E-01 S2 -9.6509E-02 6.3115E-02 7.3555E-02 -3.2339E-01 8.0097E-01 -2.1110E+00 3.3856E+00 -2.7019E+00 8.4410E-01 S3 -8.9665E-02 1.5529E-01 8.0302E-01 -4.7287E+00 1.4057E+01 -2.5882E+01 2.9094E+01 -1.8052E+01 4.7500E+00 S4 -4.1796E-02 4.6841E-01 -2.6142E+00 1.6156E+01 -6.3386E+01 1.5181E+02 -2.1644E+02 1.6913E+02 -5.5530E+01 S5 -3.4015E-01 9.8323E-01 -9.2654E+00 5.2262E+01 -1.8566E+02 4.1350E+02 -5.6173E+02 4.2523E+02 -1.3743E+02 S6 -2.8390E-01 7.1577E-01 -4.5021E+00 1.7513E+01 -4.2309E+01 6.4855E+01 -6.1061E+01 3.1992E+01 -7.0758E+00 S7 -1.9550E-01 3.0071E-01 -9.2860E-01 2.1055E+00 -1.6646E+00 -3.7974E-01 1.2685E+00 -6.6705E-01 1.1565E-01 S8 -3.0274E-02 -3.5945E-02 3.6779E-01 -1.0006E+00 1.6487E+00 -1.4942E+00 7.3840E-01 -1.8865E-01 1.9599E-02 S9 -3.6533E-01 3.1382E-01 -1.8563E-01 7.8375E-02 -2.2139E-02 4.0465E-03 -4.5963E-04 2.9559E-05 -8.2431E-07 S10 -1.6082E-01 1.1183E-01 -5.4637E-02 1.7863E-02 -3.9090E-03 5.5340E-04 -4.7142E-05 2.1232E-06 -3.6839E-08

[0132] Table 10

[0133] Fig. 10A The axial chromatic aberration curve of the optical imaging lens of Example 5 is shown, which indicates the deviation of light of different wavelengths from the focal point behind the lens. Fig. 10B The astigmatism curve of the optical imaging lens of Example 5 is shown, which represents the meridional image curvature and the sagittal image curvature. Fig. 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. Fig. 10DThe magnification 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. FIG. 10A to FIG. 10D It can be seen that the optical imaging lens provided in Example 5 can achieve good imaging quality.

[0134] In summary, Examples 1 to 5 respectively satisfy the relationships shown in Table 11.

[0135]

[0136]

[0137] Table 11

[0138] The above description is only a preferred embodiment of the present application and an explanation of the technical principles used. Those skilled in the art should understand that the scope of the invention involved in the present application is not limited to the technical solution formed by a specific combination of the above technical features, but should also cover other technical solutions formed by any combination of the above technical features or their equivalent features without departing from the inventive concept. For example, the above features are replaced with (but not limited to) technical features with similar functions disclosed in the present 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 power, its object side surface is convex and its image side surface is concave; The second lens has a negative optical power, and its object side surface is concave and its image side surface is concave; a third lens having negative optical power; a fourth lens element having positive refractive power, whose object-side surface is concave and whose image-side surface is convex; and The fifth lens has a negative optical power and its image side surface is concave. The number of lenses having optical power in the optical imaging lens is five; Among them, 1.93≤f / EPD≤2.08; 1.82≤T45 / (T23+T34)≤2.35; and 0.81≤DT31 / DT21≤0.90, Wherein, f is the total effective focal length of the optical imaging lens; EPD is the entrance pupil diameter of the optical imaging lens; T23 is the air gap between the second lens and the third lens on the optical axis; T34 is the air gap between the third lens and the fourth lens on the optical axis; T45 is the air gap between the fourth lens and the fifth lens on the optical axis; DT21 is the maximum effective semi-aperture of the object side of the second lens and DT31 is the maximum effective semi-aperture of the object side of the third lens.

2. The optical imaging lens according to claim 1, wherein: The effective focal length f1 of the first lens, the effective focal length f2 of the second lens, and the total effective focal length f of the optical imaging lens satisfy: -1.5<(f1+f2) / f≤-1.

28.

3. The optical imaging lens according to claim 1, wherein: The total effective focal length f of the optical imaging lens and the curvature radius R2 of the image side surface of the first lens satisfy: 1.56≤R2 / f≤2.

66.

4. The optical imaging lens according to claim 1, wherein: The curvature radius R7 of the object side surface of the fourth lens, the curvature radius R8 of the image side surface of the fourth lens, and the effective focal length f4 of the fourth lens satisfy: -0.96≤(R7+R8) / f4≤-0.

81.

5. The optical imaging lens according to any one of claims 1 to 4, characterized in that: The curvature radius R3 of the object side surface of the second lens and the curvature radius R4 of the image side surface of the second lens satisfy: 0.23≤(R3+R4) / (R3-R4)≤0.

93.

6. The optical imaging lens according to any one of claims 1 to 4, characterized in that: The center thickness CT1 of the first lens on the optical axis, the center thickness CT2 of the second lens on the optical axis, and the center thickness CT3 of the third lens on the optical axis satisfy: 1.16≤CT1 / (CT2+CT3)≤1.

32.

7. The optical imaging lens according to any one of claims 1 to 4, characterized in that: The on-axis 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 and the on-axis distance SAG52 from the intersection of the image-side surface of the fifth lens and the optical axis to the vertex of the effective radius of the image-side surface of the fifth lens satisfy: 1.11≤SAG51 / SAG52≤1.

35.

8. The optical imaging lens according to any one of claims 1 to 4, characterized in that: The maximum effective half-aperture DT22 of the image side surface of the second lens and the maximum effective half-aperture DT31 of the object side surface of the third lens satisfy: 0.95≤DT22 / DT31≤1.

9. The optical imaging lens according to any one of claims 1 to 4, characterized in that: The center thickness CT3 of the third lens on the optical axis and the center thickness CT4 of the fourth lens on the optical axis satisfy: 0.39≤CT3 / CT4<0.

5.

10. The optical imaging lens according to any one of claims 1 to 4, characterized in that: The center thickness CT4 of the fourth lens on the optical axis and the edge thickness ET4 of the fourth lens satisfy: 0.54≤ET4 / CT4≤0.

78.

11. The optical imaging lens according to any one of claims 1 to 4, characterized in that: The maximum effective half-aperture DT41 of the object-side surface of the fourth lens and the maximum effective half-aperture DT42 of the image-side surface of the fourth lens satisfy: 0.78≤DT41 / DT42≤1.

02.

12. 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 power, its object side surface is convex and its image side surface is concave; The second lens has a negative optical power, and its object side surface is concave and its image side surface is concave; a third lens having negative optical power; a fourth lens element having positive refractive power, whose object-side surface is concave and whose image-side surface is convex; and The fifth lens has a negative optical power and its image side surface is concave. The number of lenses having optical power in the optical imaging lens is five; Among them, -1.5<(f1+f2) / f≤-1.28; 1.82≤T45 / (T23+T34)≤2.35; and 0.81≤DT31 / DT21≤0.90, Among them, f1 is the effective focal length of the first lens; f2 is the effective focal length of the second lens; f is the total effective focal length of the optical imaging lens; T23 is the air gap between the second lens and the third lens on the optical axis; T34 is the air gap between the third lens and the fourth lens on the optical axis; T45 is the air gap between the fourth lens and the fifth lens on the optical axis; DT21 is the maximum effective semi-aperture of the object side of the second lens and DT31 is the maximum effective semi-aperture of the object side of the third lens.

13. The optical imaging lens according to claim 12, wherein: The total effective focal length f of the optical imaging lens and the curvature radius R2 of the image side surface of the first lens satisfy: 1.56≤R2 / f≤2.

66.

14. The optical imaging lens according to claim 13, wherein: The entrance pupil diameter EPD of the optical imaging lens and the total effective focal length f of the optical imaging lens satisfy: 1.93≤f / EPD≤2.

08.

15. The optical imaging lens according to claim 12, wherein: The curvature radius R7 of the object side surface of the fourth lens, the curvature radius R8 of the image side surface of the fourth lens, and the effective focal length f4 of the fourth lens satisfy: -0.96≤(R7+R8) / f4≤-0.

81.

16. The optical imaging lens according to any one of claims 12 to 15, characterized in that: The curvature radius R3 of the object side surface of the second lens and the curvature radius R4 of the image side surface of the second lens satisfy: 0.23≤(R3+R4) / (R3-R4)≤0.

93.

17. The optical imaging lens according to any one of claims 12 to 15, characterized in that: The center thickness CT1 of the first lens on the optical axis, the center thickness CT2 of the second lens on the optical axis, and the center thickness CT3 of the third lens on the optical axis satisfy: 1.16≤CT1 / (CT2+CT3)≤1.

32.

18. The optical imaging lens according to any one of claims 12 to 15, characterized in that: The on-axis 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 and the on-axis distance SAG52 from the intersection of the image-side surface of the fifth lens and the optical axis to the vertex of the effective radius of the image-side surface of the fifth lens satisfy: 1.11≤SAG51 / SAG52≤1.

35.

19. The optical imaging lens according to any one of claims 12 to 15, characterized in that: The maximum effective half-aperture DT22 of the image side surface of the second lens and the maximum effective half-aperture DT31 of the object side surface of the third lens satisfy: 0.95≤DT22 / DT31≤1.

20. The optical imaging lens according to any one of claims 12 to 15, characterized in that: The center thickness CT3 of the third lens on the optical axis and the center thickness CT4 of the fourth lens on the optical axis satisfy: 0.39≤CT3 / CT4<0.

5.

21. The optical imaging lens according to any one of claims 12 to 15, characterized in that: The center thickness CT4 of the fourth lens on the optical axis and the edge thickness ET4 of the fourth lens satisfy: 0.54≤ET4 / CT4≤0.

78.

22. The optical imaging lens according to any one of claims 12 to 15, characterized in that: The maximum effective half-aperture DT41 of the object-side surface of the fourth lens and the maximum effective half-aperture DT42 of the image-side surface of the fourth lens satisfy: 0.78≤DT41 / DT42≤1.02.

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