Optical imaging lens

Abstract

The application discloses an optical imaging lens, which comprises, in sequence from the object side to the image side along the optical axis, a first lens, a second lens, a third lens, a fourth lens, a fifth lens, a sixth lens, a seventh lens and an eighth lens, wherein the second lens has a negative refractive power; the third lens has a negative refractive power; the object side surface of the fourth lens is a convex surface; the sixth lens has a positive refractive power; and the object side surface of the eighth lens is a concave surface. The distance from the object side surface of the first lens to the imaging surface of the optical imaging lens along the optical axis and half of the diagonal length of the effective pixel area on the imaging surface satisfy TTL / ImgH < 1.4. The effective focal length of the seventh lens, the effective focal length of the sixth lens and the effective focal length of the optical imaging lens satisfy 0 < (f7-f6) / f < 8.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of optical elements, and more particularly, to an optical imaging lens. BACKGROUND

[0002] Now the development of smart phones is faster and faster, in the process of upgrading the update progress of camera function is a major mainstream point. Based on the market demand, the resolution and the requirement of ultra-thin of mobile phone camera of major mobile phone manufacturers are higher and higher. Higher resolution often means larger image surface, also means larger camera size, and the traditional six-piece, seven-piece lens can not meet the requirement of ultra-high performance, the application of eight-piece and nine-piece lens further improves the challenge of design and processing under the requirement of ultra-thin. Therefore, designing and developing a kind of optical imaging lens with large image surface, ultra-thin and ultra-high performance to better meet the application requirement of next generation smart phone camera has become one of the problems to be solved by the technical personnel in the field at present. SUMMARY

[0003] The present application provides an optical imaging lens, which can include, in order from the object side to the image side along the optical axis: a first lens, a second lens, a third lens, a fourth lens, a fifth lens, a sixth lens, a seventh lens and an eighth lens, wherein the second lens has negative refractive power; the third lens has negative refractive power; the object side surface of the fourth lens is convex; the sixth lens has positive refractive power; and the object side surface of the eighth lens is concave. The distance TTL from the object side surface of the first lens to the imaging surface of the optical imaging lens along the optical axis and half of the diagonal length of the effective pixel area on the imaging surface ImgH can satisfy: TTL / ImgH<1.4; and the effective focal length f7 of the seventh lens, the effective focal length f6 of the sixth lens and the effective focal length f of the optical imaging lens can satisfy: 0<(f7-f6) / f<8.

[0004] In one embodiment, the effective focal length f of the optical imaging lens and the radius of curvature R7 of the object side surface of the fourth lens can satisfy: 0<R7 / f<8.

[0005] In one embodiment, the first lens has positive refractive power, is a glass lens with aspherical object side surface and image side surface, the Abbe number V1 of the first lens can satisfy: V1>50, and the radius of curvature R2 of the image side surface of the first lens and the radius of curvature R1 of the object side surface of the first lens can satisfy: 0.5<R2 / R1<7.

[0006] In an embodiment, the air interval T34 of the third lens and the fourth lens on the optical axis is the smallest among the air intervals of any two adjacent lenses among the first lens to the eighth lens on the optical axis, and the air interval T12 of the first lens and the second lens on the optical axis and the air interval T34 of the third lens and the fourth lens on the optical axis satisfy: 0 < T12 / T34 < 3.

[0007] In an embodiment, the central thickness CT4 of the fourth lens on the optical axis and the central thickness CT3 of the third lens on the optical axis satisfy: 0.5 < CT4 / CT3 < 3.5.

[0008] In an embodiment, the central thickness CT7 of the seventh lens on the optical axis, the air interval T67 of the sixth lens and the seventh lens on the optical axis, and the air interval T78 of the seventh lens and the eighth lens on the optical axis satisfy: 0.5 < CT7 / (T67-T78) < 3.5.

[0009] In an embodiment, the surface shape of at least four lenses among the first lens to the eighth lens satisfies that the object side surface is convex and the image side surface is concave.

[0010] In an embodiment, the effective focal length f4 of the fourth lens, the effective focal length f5 of the fifth lens, the effective focal length f6 of the sixth lens, the radius of curvature R9 of the object side surface of the fifth lens, and the radius of curvature R10 of the image side surface of the fifth lens satisfy: 0 < |f4+f5+f6| / (R9+R10) < 4.

[0011] In an embodiment, the minimum value Vp of the dispersion coefficient of the plastic lens in the optical imaging lens and the effective focal length f of the optical imaging lens satisfy: 2 < Vp / f < 3.

[0012] In an embodiment, the maximum value Npmax of the refractive index of the plastic lens in the optical imaging lens and the refractive index N1 of the first lens satisfy: 4 < 1 / (Npmax-N1) < 7.

[0013] In an embodiment, the refractive power of the eighth lens is positive, and the radius of curvature R15 of the object side surface of the eighth lens and the effective focal length f8 of the eighth lens satisfy: 0 < R15 / f8 < 1.

[0014] In an embodiment, the air interval T45 of the fourth lens and the fifth lens on the optical axis and the air interval T56 of the fifth lens and the sixth lens on the optical axis satisfy: 1 < T45 / T56 < 2.5.

[0015] In one embodiment, the seventh lens has positive refractive power, and a radius of curvature R13 of an object side surface of the seventh lens and a radius of curvature R14 of an image side surface of the seventh lens and an effective focal length f7 of the seventh lens satisfy: 0.5 < (R13+R14) / f7 < 1.5.

[0016] In one embodiment, the first lens to the eighth lens are all plastic lenses, and each of the first lens to the eighth lens has a refractive index greater than 1.5.

[0017] In one embodiment, a central thickness CT1 of the first lens on the optical axis, a central thickness CT4 of the fourth lens on the optical axis, a central thickness CT6 of the sixth lens on the optical axis, and a sum ∑CT of the central thicknesses of the first lens to the eighth lens on the optical axis satisfy: 0.2 < (CT1+CT4+CT6) / ∑CT < 0.8.

[0018] The present application adopts an eight-piece lens architecture. According to embodiments of the present application, by setting the second lens and the third lens to have negative refractive power, the fourth lens to have a convex object side surface, the sixth lens to have positive refractive power, and the eighth lens to have a concave object side surface, and by constraining a ratio of a distance from the object side surface of the first lens to the imaging surface along the optical axis to half of a diagonal length of an effective pixel region on the imaging surface to be within a reasonable range, and by controlling the effective focal lengths of the sixth lens and the seventh lens and the effective focal length of the system to satisfy 0 < (f7-f6) / f < 8, the optical imaging system can be thinned while meeting the requirement of a large imaging surface. This is conducive to the distribution of the eight-piece lens in a limited space. Meanwhile, this is conducive to the reasonable distribution of the refractive power of the lenses, so as to achieve the purpose of reasonable distribution of the lenses. BRIEF DESCRIPTION OF DRAWINGS

[0019] Other features, objects, and advantages of the present 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:

[0020] Figure 1 A structure diagram of an optical imaging lens according to Embodiment 1 of the present application is shown;

[0021] Figures 2A to 2D Axial chromatic aberration curves, astigmatism curves, distortion curves, and lateral chromatic aberration curves of the optical imaging lens of Embodiment 1 are shown respectively;

[0022] Figure 3 A structure diagram of an optical imaging lens according to Embodiment 2 of the present application is shown;

[0023] Figures 4A to 4D Axial chromatic aberration curves, astigmatism curves, distortion curves, and lateral chromatic aberration curves of the optical imaging lens of Embodiment 2 are shown respectively;

[0024] Figure 5 A structural diagram of an optical imaging lens according to Embodiment 3 of the present application is shown;

[0025] Figures 6A to 6D Axial chromatic aberration curves, astigmatism curves, distortion curves and lateral chromatic aberration curves of the optical imaging lens of Embodiment 3 are shown respectively;

[0026] Figure 7 A structural diagram of an optical imaging lens according to Embodiment 4 of the present application is shown;

[0027] Figures 8A to 8D Axial chromatic aberration curves, astigmatism curves, distortion curves and lateral chromatic aberration curves of the optical imaging lens of Embodiment 4 are shown respectively;

[0028] Figure 9 A structural diagram of an optical imaging lens according to Embodiment 5 of the present application is shown;

[0029] Figures 10A to 10D Axial chromatic aberration curves, astigmatism curves, distortion curves and lateral chromatic aberration curves of the optical imaging lens of Embodiment 5 are shown respectively;

[0030] Figure 11 A structural diagram of an optical imaging lens according to Embodiment 6 of the present application is shown; and

[0031] Figures 12A to 12D Axial chromatic aberration curves, astigmatism curves, distortion curves and lateral chromatic aberration curves of the optical imaging lens of Embodiment 6 are shown respectively. DETAILED DESCRIPTION

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

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

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

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

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

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

[0038] It should be noted that the embodiments in the present application and the features in the embodiments 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 embodiments.

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

[0040] The optical imaging lens according to the exemplary embodiments of the present application can include, for example, eight lenses, i.e., a first lens, a second lens, a third lens, a fourth lens, a fifth lens, a sixth lens, a seventh lens, and an eighth lens. The eight lenses are arranged in order from the object side to the image side along the optical axis.

[0041] In exemplary embodiments, the first lens can have positive refractive power or negative refractive power; the second lens can have negative refractive power; the third lens can have negative refractive power; the fourth lens can have positive refractive power or negative refractive power; the fifth lens can have positive refractive power or negative refractive power; the sixth lens can have positive refractive power; the seventh lens can have positive refractive power or negative refractive power; and the eighth lens can have positive refractive power or negative refractive power.

[0042] In exemplary embodiments, the object side surface of the fourth lens can be convex. The object side surface of the eighth lens can be concave.

[0043] In exemplary embodiments, the optical imaging lens according to the present application can satisfy the condition formula TTL / ImgH<1.4, where TTL is the distance along the optical axis from the object side surface of the first lens to the imaging surface of the optical imaging lens, and ImgH is half of the diagonal length of the effective pixel area on the imaging surface. By controlling the ratio of the distance along the optical axis from the object side surface of the first lens to the imaging surface of the optical imaging lens to half of the diagonal length of the effective pixel area on the imaging surface to be within this range, the system can be thinned while meeting the requirement of a large image surface; and it is beneficial to realize the distribution of the eight-piece lens in a limited space.

[0044] In exemplary embodiments, the optical imaging lens according to the present application can satisfy the condition formula 0<(f7-f6) / f<8, where f7 is the effective focal length of the seventh lens, f6 is the effective focal length of the sixth lens, and f is the effective focal length of the optical imaging lens. By controlling the effective focal length of the seventh lens, the effective focal length of the sixth lens, and the effective focal length of the optical imaging lens to satisfy 0<(f7-f6) / f<8, it is beneficial to reasonably distribute the refractive power of the lenses and to achieve the purpose of reasonable distribution of the lenses. More specifically, f7, f6, and f can satisfy 0<(f7-f6) / f<2.

[0045] In exemplary embodiments, the optical imaging lens according to the present application can satisfy the condition formula 0<R7 / f<8, where f is the effective focal length of the optical imaging lens, and R7 is the radius of curvature of the object side surface of the fourth lens. By controlling the ratio of the radius of curvature of the object side surface of the fourth lens to the effective focal length of the optical imaging lens to be within this range, the field curvature and distortion of the optical imaging lens group can be improved, the imaging quality can be improved while reducing the processing difficulty. More specifically, R7 and f can satisfy 1<R7 / f<6.

[0046] In exemplary embodiments, the first lens can have a positive refractive power, and can be a glass lens with aspheric surfaces on both object side and image side, and the Abbe number V1 of the first lens can satisfy V1>50. The optical imaging lens according to the present application can also satisfy the condition 0.5

[0047] In exemplary embodiments, the air separation of any two adjacent lenses among the first lens to the eighth lens on the optical axis can satisfy that the air separation of the third lens and the fourth lens on the optical axis is the smallest, and the optical imaging lens according to the present application can satisfy the condition 0

[0048] In exemplary embodiments, the optical imaging lens according to the present application can satisfy the condition 0.5

[0049] In exemplary embodiments, the optical imaging lens according to the present application can satisfy the condition 0.5

[0050] In exemplary embodiments, the face type of at least four of the first lens to the eighth lens can satisfy that the object side face is convex and the image side face is concave. Thus, on-axis aberration can be balanced, and imaging quality can be improved.

[0051] In exemplary embodiments, the optical imaging lens of the present application can satisfy the condition formula 0<|f4+f5+f6| / (R9+R10)<4, where f4 is the effective focal length of the fourth lens, f5 is the effective focal length of the fifth lens, f6 is the effective focal length of the sixth lens, R9 is the curvature radius of the object side face of the fifth lens, and R10 is the curvature radius of the image side face of the fifth lens. By controlling the effective focal length of the fourth lens, the effective focal length of the fifth lens, the effective focal length of the sixth lens, the curvature radius of the object side face of the fifth lens, and the curvature radius of the image side face of the fifth lens to satisfy 0<|f4+f5+f6| / (R9+R10)<4, the fifth lens can be prevented from being too curved, the processing difficulty can be reduced, the light converging ability of the optical lens group can be improved, the light focusing position can be adjusted, the total length of the optical lens can be shortened, and the ultra-thin feature can be achieved. More specifically, f4, f5, f6, R9, and R10 can satisfy 0<|f4+f5+f6| / (R9+R10)<3.

[0052] In exemplary embodiments, the optical imaging lens of the present application can satisfy the condition formula 2<Vp / f<3, where Vp is the minimum value of the dispersion coefficient of the plastic lens among the first lens to the eighth lens, and f is the effective focal length of the optical imaging lens. By controlling the ratio of the minimum value of the dispersion coefficient of the plastic lens among the first lens to the eighth lens to the effective focal length of the optical imaging lens to be within the range, the positional chromatic aberration can be reduced, and the imaging quality can be improved.

[0053] In exemplary embodiments, the optical imaging lens of the present application can satisfy the condition formula 4<1 / (Npmax-N1)<7, where Npmax is the maximum value of the refractive index of the plastic lens in the optical imaging lens, and N1 is the refractive index of the first lens. By controlling the maximum value of the refractive index of the plastic lens in the optical imaging lens and the refractive index of the first lens to satisfy 4<1 / (Npmax-N1)<7, the light can have a larger deflection angle, the length of the entire optical system can be effectively shortened, and a large image surface effect can be achieved. More specifically, Npmax and N1 can satisfy 5<1 / (Npmax-N1)<6.5.

[0054] In exemplary embodiments, the eighth lens has a positive refractive power, and the optical imaging lens of the present application can satisfy the condition formula 0 < R15 / f8 < 1, wherein R15 is the curvature radius of the object side surface of the eighth lens, and f8 is the effective focal length of the eighth lens. By controlling the ratio of the curvature radius of the object side surface of the eighth lens to the effective focal length of the eighth lens to be within the range, the optical system can better match the chip CRA.

[0055] In exemplary embodiments, the optical imaging lens of the present application can satisfy the condition formula 1 < T45 / T56 < 2.5, wherein T45 is the air separation of the fourth lens and the fifth lens on the optical axis, and T56 is the air separation of the fifth lens and the sixth lens on the optical axis. By controlling the ratio of the air separation of the fourth lens and the fifth lens on the optical axis to the air separation of the fifth lens and the sixth lens on the optical axis to be within the range, the field curvature generated by the front system lens and the field curvature generated by the rear system lens can be balanced, so that the system has a reasonable field curvature.

[0056] In exemplary embodiments, the seventh lens has a positive refractive power, and the optical imaging lens of the present application can satisfy the condition formula 0.5 < (R13+R14) / f7 < 1.5, wherein R13 is the curvature radius of the object side surface of the seventh lens, R14 is the curvature radius of the image side surface of the seventh lens, and f7 is the effective focal length of the seventh lens. By controlling the curvature radius of the object side surface of the seventh lens, the curvature radius of the image side surface of the seventh lens, and the effective focal length of the seventh lens to satisfy 0.5 < (R13+R14) / f7 < 1.5, the molding difficulty of the seventh lens can be reduced, the sensitivity can be reduced, and the processability of the imaging system can be ensured.

[0057] In exemplary embodiments, the refractive index of the plastic lens among the first lens to the eighth lens is greater than 1.5. A higher refractive index can ensure a higher resolving power in the case of a large image surface, and can improve the imaging quality.

[0058] In exemplary embodiments, the optical imaging lens of the present application can satisfy the condition formula 0.2 < (CT1+CT4+CT6) / ∑CT < 0.8, wherein CT1 is the center thickness of the first lens on the optical axis, CT4 is the center thickness of the fourth lens on the optical axis, CT6 is the center thickness of the sixth lens on the optical axis, and ∑CT is the sum of the center thicknesses of the first lens to the eighth lens on the optical axis. By controlling the center thickness of the first lens on the optical axis, the center thickness of the fourth lens on the optical axis, the center thickness of the sixth lens on the optical axis, and the sum of the center thicknesses of the first lens to the eighth lens on the optical axis to satisfy 0.2 < (CT1+CT4+CT6) / ∑CT < 0.8, the size of the optical imaging lens group can be effectively reduced to meet the ultra-thin feature, and reasonable allocation of the thickness can reduce the sensitivity of the medium thickness to the field curvature and the peak value, and improve the yield.

[0059] In exemplary embodiments, the optical imaging lens of the present application can comprise at least one diaphragm. The diaphragm can restrict the light path and control the light intensity. The diaphragm can be arranged at an appropriate position of the optical imaging lens, for example, the diaphragm can be located between the object side and the first lens.

[0060] In exemplary embodiments, the optical imaging lens described above can further comprise an optical filter for correcting color deviation and / or a protective glass for protecting the photosensitive element located on the imaging surface.

[0061] The optical imaging lens according to the above embodiments of the present application can adopt multiple lenses, for example, eight lenses as described above. By arranging the second lens and the third lens to have negative refractive power, the fourth lens to have a convex object side, the sixth lens to have positive refractive power, and the eighth lens to have a concave object side, and by restricting the ratio of the distance from the object side surface of the first lens to the imaging surface to half of the diagonal length of the effective pixel area on the imaging surface to be within a reasonable range, and by controlling the effective focal length of the sixth lens and the seventh lens and the effective focal length of the system to satisfy 0 < (f7-f6) / f < 8, the optical imaging system can be thinned while meeting the requirement of a large imaging surface. This is also conducive to the distribution of the eight lenses in a limited space. At the same time, it is conducive to the reasonable distribution of the refractive power of the lenses, achieving the purpose of reasonable distribution of the lenses.

[0062] In the embodiments of the present application, at least one of the lens surfaces of the first lens, the second lens, the third lens, the fourth lens, the fifth lens, the sixth lens, the seventh lens, and the eighth lens can be an aspherical lens surface, that is, at least one of the object side surface of the first lens to the image side surface of the eighth lens can be 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 the spherical lens which has constant curvature from the center of the lens to the periphery of the lens, the aspherical lens has better curvature radius characteristics, which has the advantages of improving distortion aberration and improving astigmatism aberration. By using the aspherical lens, the aberration that occurs during imaging can be eliminated as much as possible, thereby improving the imaging quality. Optionally, at least one of the object side surface and the image side surface of each of the first lens, the second lens, the third lens, the fourth lens, the fifth lens, the sixth lens, the seventh lens, and the eighth lens is an aspherical lens surface. Optionally, the object side surface and the image side surface of each of the first lens, the second lens, the third lens, the fourth lens, the fifth lens, the sixth lens, the seventh lens, and the eighth lens are aspherical lens surfaces.

[0063] However, those skilled in the art will understand that the number of lenses constituting the optical imaging lens can be changed without departing from the technical solutions claimed in the present application, to obtain the various results and advantages described in the present specification. For example, although eight lenses are described as an example in the embodiments, the optical imaging lens is not limited to including eight lenses. If necessary, the optical imaging lens can also include other numbers of lenses.

[0064] The specific embodiments of the optical imaging lens applicable to the above-described embodiments are further described below with reference to the accompanying drawings.

[0065] Example 1

[0066] The following refers to Figures 1 to 2D An optical imaging lens according to Embodiment 1 of the present application is described. Figure 1 A structural schematic diagram of the optical imaging lens according to Embodiment 1 of the present application is shown.

[0067] As Figure 1 shown, the optical imaging lens includes, in order from the object side to the image side along the optical axis, a stop STO, a first lens E1, a second lens E2, a third lens E3, a fourth lens E4, a fifth lens E5, a sixth lens E6, a seventh lens E7, an eighth lens E8, and a filter E9.

[0068] 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 convex surface, and the image side surface S4 is a concave surface. The third lens E3 has negative refractive power, the object side surface S5 is a 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 convex surface, and the image side surface S10 is a concave 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 seventh lens E7 has positive refractive power, the object side surface S13 is a convex surface, and the image side surface S14 is a concave surface. The eighth lens E8 has negative refractive power, the object side surface S15 is a concave surface, and the image side surface S16 is a concave surface. The filter E9 has an object side surface S17 and an image side surface S18. The optical imaging lens has an imaging surface S19, and light from an object sequentially passes through each surface S1 to S18 and is finally imaged on the imaging surface S19.

[0069] Table 1 shows the basic parameters of the optical imaging lens of Embodiment 1, wherein the units of the curvature radii and the thicknesses / distances are millimeters (mm).

[0070]

[0071]

[0072] Table 1

[0073] In embodiment 1, the object side surface and the image side surface of any one of the first lens E1 to the eighth lens E8 are aspherical surfaces, and the surface type x of each aspherical surface can be defined by, but not limited to, the following aspherical surface formula:

[0074]

[0075] wherein x is the sag of the aspherical surface at a position along the optical axis with a height of h, c is the paraxial curvature of the aspherical surface, c = 1 / R (i.e., the paraxial curvature c is the inverse of the curvature radius R in Table 1 above), k is the conic coefficient, and Ai is the correction coefficient of the i-th order of the aspherical surface. The higher order 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 to S16 that can be used in embodiment 1 are given in Table 2-1 and Table 2-2 below. 10 12 14 16 18 20 22 24 26 28 30 .

[0076]

[0077]

[0078] Table 2-1

[0079] Face number A18 A20 A22 A24 A26 A28 A30 S1 -3.8391E-06 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 S2 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 S3 -1.8330E-05 -1.6606E-06 -2.5856E-06 -7.6565E-07 -7.1850E-06 -2.2176E-06 1.8908E-06 S4 2.1687E-06 -4.8833E-06 -1.1863E-05 -1.3080E-05 1.9236E-06 2.2869E-06 -3.8568E-06 S5 5.6234E-06 -2.3157E-05 -5.5518E-06 5.2914E-06 5.1739E-06 6.4018E-06 2.0666E-06 S6 3.7622E-06 3.7398E-06 -3.4857E-06 5.9497E-06 1.3418E-06 -1.2398E-06 -2.4727E-06 S7 6.9636E-06 -1.0077E-05 -6.7274E-06 -1.0733E-05 3.0840E-06 -1.6466E-07 5.2042E-06 S8 -7.1060E-06 -2.1974E-05 3.3113E-06 -1.3211E-06 1.4449E-05 3.1954E-06 3.5659E-06 S9 4.4947E-04 -4.0748E-04 -2.1047E-04 -1.9432E-04 -6.8252E-06 -2.9069E-05 2.7626E-05 S10 -9.8395E-04 -6.5278E-04 5.4030E-04 6.0998E-05 -5.2149E-05 -1.2083E-04 4.0820E-05 S11 -2.6068E-03 -2.5169E-03 -1.5926E-04 6.1713E-04 6.1632E-04 -1.3627E-04 -1.6288E-04 S12 -6.7404E-04 -1.1843E-03 2.3359E-04 2.9826E-04 -2.0458E-04 -2.3423E-04 2.1190E-04 S13 2.4953E-03 -5.1095E-03 1.4688E-03 8.6212E-04 5.0941E-04 -1.4160E-03 5.8971E-04 S14 1.0461E-02 1.7877E-03 2.2605E-03 -6.0394E-03 -1.4707E-03 2.6747E-04 8.6736E-04 S15 2.1683E-02 -2.2192E-02 9.7752E-03 -3.2973E-03 4.3559E-03 -2.9442E-03 7.8873E-04 S16 2.1783E-02 -2.3578E-02 1.0101E-02 -5.9321E-04 2.1314E-03 -8.3578E-04 7.5814E-05

[0080] Table 2-2

[0081] Figure 2A The on-axis chromatic aberration curve of the optical imaging lens of embodiment 1 is shown, which represents the deviation of light rays of different wavelengths after passing through the lens. Figure 2B The astigmatism curve of the optical imaging lens of embodiment 1 is shown, which represents the meridional image curvature and sagittal image curvature. Figure 2C The distortion curve of the optical imaging lens of embodiment 1 is shown, which represents the distortion size values corresponding to different image heights. Figure 2D The lateral chromatic aberration curve of the optical imaging lens of embodiment 1 is shown, which represents the deviation of light rays on the imaging plane after passing through the lens at different image heights. According to Figures 2A to 2D It can be seen that the optical imaging lens given in embodiment 1 can achieve good imaging quality.

[0082] Example 2 ​​​​​​​​​​

[0083] The following is for reference Figures 3 to 4D This paper describes an optical imaging lens according to Embodiment 2 of this application. For the sake of brevity, descriptions similar to those in Embodiment 1 will be omitted in this embodiment and the following embodiments. Figure 3 A schematic diagram of the structure of an optical imaging lens according to Embodiment 2 of this application is shown.

[0084] like Figure 3 As shown, the optical imaging lens includes, in sequence from the object side to the image side along the optical axis: aperture STO, first lens E1, second lens E2, third lens E3, fourth lens E4, fifth lens E5, sixth lens E6, seventh lens E7, eighth lens E8, and filter E9.

[0085] The first lens E1 has positive refractive power, with its object-side surface S1 being convex and its image-side surface S2 being concave. The second lens E2 has negative refractive power, with its object-side surface S3 being convex and its image-side surface S4 being concave. The third lens E3 has negative refractive power, with its object-side surface S5 being convex and its image-side surface S6 being concave. The fourth lens E4 has positive refractive power, with its object-side surface S7 being convex and its image-side surface S8 being convex. The fifth lens E5 has negative refractive power, with its object-side surface S9 being convex and its image-side surface S10 being concave. The sixth lens E6 has positive refractive power, with its object-side surface S11 being convex and its image-side surface S12 being concave. The seventh lens E7 has positive refractive power, with its object-side surface S13 being convex and its image-side surface S14 being concave. The eighth lens E8 has negative refractive power, with its object-side surface S15 being concave and its image-side surface S16 being convex. The filter E9 has an object-side surface S17 and an image-side surface S18. The optical imaging lens has an imaging surface S19, and light from the object passes sequentially through the surfaces S1 to S18 and is finally imaged on the imaging surface S19.

[0086] Table 3 shows the basic parameters of the optical imaging lens of Example 2, where the units for radius of curvature and thickness / distance are millimeters (mm). Tables 4-1 and 4-2 show the higher-order coefficients A4, A6, A8, and A6 that can be used for each aspherical mirror S1 to S16 in Example 2. 10 A 12 A 14 A 16 A 18 A 20 A 22 A 24 A 26 A 28 and A 30 Each aspherical surface shape can be defined by formula (1) given in Example 1 above.

[0087]

[0088] Table 3

[0089] Face number A4 A6 A8 A10 A12 A14 A16 S1 -1.1444E-02 2.3249E-03 -1.8175E-03 5.0227E-04 -4.3305E-04 2.0078E-04 -1.6114E-04 S2 -2.7162E-02 6.7766E-04 9.5293E-04 -1.2447E-03 5.0044E-04 -3.4542E-04 3.2500E-04 S3 4.5495E-02 1.6045E-02 -1.2590E-03 7.5662E-04 -3.5606E-04 7.7455E-05 -1.1628E-04 S4 5.0877E-02 5.9859E-03 9.8217E-05 3.0045E-04 1.1074E-04 -1.1534E-04 4.4649E-05 S5 -1.4996E-01 1.6495E-03 2.4333E-04 1.3813E-03 -4.7530E-04 1.4247E-04 -1.0975E-04 S6 -1.6357E-01 1.4671E-02 9.8590E-04 1.0034E-03 -6.3079E-04 -5.6728E-05 1.2555E-05 S7 -2.1731E-01 1.5074E-02 -3.4622E-03 3.3570E-04 -8.4995E-04 2.7993E-05 -4.9109E-05 S8 -2.5491E-01 2.9870E-03 -3.3455E-03 -3.3823E-04 -1.4421E-05 -4.3552E-07 8.3096E-05 S9 -1.0267E+00 2.8481E-02 -5.5172E-03 2.5932E-03 -3.1961E-03 1.2157E-03 6.4767E-04 S10 -1.6558E+00 2.4911E-01 -7.4399E-04 6.9792E-04 -1.0230E-02 4.9051E-03 1.4577E-03 S11 -3.3711E+00 4.4152E-01 3.9248E-03 1.0482E-02 -3.0308E-02 1.1975E-02 1.1310E-03 S12 -2.7761E+00 4.8323E-01 -1.3324E-01 3.9299E-02 -1.9350E-02 1.1243E-02 -5.5666E-03 S13 -5.7952E+00 1.5808E+00 -5.5770E-01 9.2698E-02 4.2418E-02 -3.6826E-02 3.9233E-03 S14 -3.2575E+00 2.8307E-01 4.3398E-02 -2.2813E-02 7.2815E-03 6.5782E-03 -1.2991E-02 S15 5.1788E+00 -1.2474E+00 5.8739E-01 -2.6983E-01 8.0701E-02 -4.3983E-02 2.9871E-03 S16 -1.3757E+00 1.7255E-01 -6.4684E-03 -3.6776E-02 6.0070E-02 -5.7205E-02 2.4829E-02

[0090] Table 4-1

[0091]

[0092]

[0093] Table 4-2

[0094] Figure 4A The on-axis chromatic aberration curve of the optical imaging lens of Example 2 is shown, which represents the convergence focus point deviation of light rays of different wavelengths after passing through the lens. Figure 4B The astigmatism curve of the optical imaging lens of Example 2 is shown, which represents the meridional image curvature and sagittal image curvature. Figure 4C The distortion curve of the optical imaging lens of Example 2 is shown, which represents the distortion size values corresponding to different image heights. Figure 4D The rate of change of the optical imaging lens of Example 2 is shown, which represents the deviation of light rays on the imaging plane after passing through the lens. According to Figures 4A to 4D It can be seen that the optical imaging lens given by Example 2 can achieve good imaging quality.

[0095] Example 3

[0096] The following refers to Figures 5 to 6D The optical imaging lens according to Example 3 of the present application is described. Figure 5 The structural schematic diagram of the optical imaging lens according to Example 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 stop STO, a first lens E1, a second lens E2, a third lens E3, a fourth lens E4, a fifth lens E5, a sixth lens E6, a seventh lens E7, an eighth lens E8 and a filter E9.

[0098] The first lens E1 has positive refractive power, with its object-side surface S1 being convex and its image-side surface S2 being concave. The second lens E2 has negative refractive power, with its object-side surface S3 being convex and its image-side surface S4 being concave. The third lens E3 has negative refractive power, with its object-side surface S5 being convex and its image-side surface S6 being concave. The fourth lens E4 has positive refractive power, with its object-side surface S7 being convex and its image-side surface S8 being concave. The fifth lens E5 has negative refractive power, with its object-side surface S9 being convex and its image-side surface S10 being concave. The sixth lens E6 has positive refractive power, with its object-side surface S11 being convex and its image-side surface S12 being concave. The seventh lens E7 has positive refractive power, with its object-side surface S13 being convex and its image-side surface S14 being concave. The eighth lens E8 has negative refractive power, with its object-side surface S15 being concave and its image-side surface S16 being convex. The filter E9 has an object-side surface S17 and an image-side surface S18. The optical imaging lens has an imaging surface S19, and light from the object passes sequentially through the surfaces S1 to S18 and is finally imaged on the imaging surface S19.

[0099] Table 5 shows the basic parameters of the optical imaging lens of Example 3, where the units for radius of curvature and thickness / distance are millimeters (mm). Tables 6-1 and 6-2 show the higher-order coefficients A4, A6, A8, and A6 that can be used for the aspherical mirrors S1 to S16 in Example 3. 10 A 12 A 14 A 16 A 18 A 20 A 22 A 24 A 26 A 28 and A 30 Each aspherical surface shape can be defined by formula (1) given in Example 1 above.

[0100]

[0101]

[0102] Table 5

[0103] Face number A4 A6 A8 A10 A12 A14 A16 S1 -1.0820E-02 -1.0399E-03 -1.1837E-03 8.5406E-05 -1.7486E-04 8.9104E-05 -4.7521E-05 S2 -3.7642E-02 4.9483E-03 -1.9190E-04 -5.0135E-04 -2.3249E-06 -1.7203E-04 3.3835E-05 S3 5.0270E-02 1.7863E-02 -3.3732E-04 3.6205E-04 -3.1141E-04 -1.6174E-05 -8.9593E-05 S4 5.4164E-02 7.0858E-03 6.7115E-04 3.7307E-04 8.9765E-05 -6.7673E-05 1.1827E-05 S5 -1.4381E-01 -2.9016E-04 9.1878E-04 1.1925E-03 -3.8571E-04 1.3465E-04 -8.5451E-05 S6 -1.6652E-01 1.4580E-02 8.0261E-04 1.0941E-03 -7.0124E-04 5.2444E-05 -1.5431E-05 S7 -2.2468E-01 1.6259E-02 -3.8825E-03 1.4404E-04 -1.0110E-03 1.0979E-04 -8.2114E-06 S8 -2.6851E-01 -4.6789E-03 -5.4274E-03 -4.7118E-04 3.0696E-04 5.2057E-04 4.2781E-04 S9 -1.0239E+00 9.0120E-03 -1.0611E-02 6.9728E-03 -9.4704E-04 2.9945E-03 1.4170E-03 S10 -1.6531E+00 2.5136E-01 -1.1271E-03 3.0795E-03 -1.1327E-02 5.7438E-03 -1.3274E-05 S11 -3.4395E+00 4.1185E-01 7.5777E-03 1.7908E-02 -2.2358E-02 1.7038E-02 -1.2119E-03 S12 -2.6385E+00 4.9503E-01 -1.4810E-01 4.1093E-02 -1.5452E-02 1.1267E-02 1.1337E-04 S13 -5.6828E+00 1.5861E+00 -5.5980E-01 8.4764E-02 4.8568E-02 -3.8758E-02 2.5879E-03 S14 -3.2116E+00 2.9497E-01 3.8909E-02 -1.7688E-02 -4.3812E-03 1.1518E-02 -3.3999E-03 S15 5.4331E+00 -1.2259E+00 5.5622E-01 -2.4696E-01 9.8473E-02 -4.2585E-02 1.0254E-03 S16 -2.2463E+00 2.2275E-01 -2.6239E-02 -4.7866E-02 8.0029E-02 -7.1651E-02 5.7237E-03

[0104] Table 6-1

[0105]

[0106]

[0107] Table 6-2

[0108] Figure 6AThe on-axis chromatic aberration curve of the optical imaging lens of Embodiment 3 is shown, which represents the deviation of convergent focus points of light rays of different wavelengths after passing through the lens. Figure 6B The astigmatism curve of the optical imaging lens of Embodiment 3 is shown, which represents the meridional image curvature and sagittal image curvature. Figure 6C The distortion curve of the optical imaging lens of Embodiment 3 is shown, which represents the distortion size values corresponding to different image heights. Figure 6D The magnification chromatic aberration curve of the optical imaging lens of Embodiment 3 is shown, which represents the deviation of light rays on the imaging plane after passing through the lens at different image heights. According to Figures 6A to 6D It can be known that the optical imaging lens given in Embodiment 3 can achieve good imaging quality.

[0109] Example 4

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

[0111] As Figure 7 shown, the optical imaging lens sequentially includes, along the optical axis from the object side to the image side, a stop STO, a first lens E1, a second lens E2, a third lens E3, a fourth lens E4, a fifth lens E5, a sixth lens E6, a seventh lens E7, an eighth lens E8, and a filter E9.

[0112] 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 convex surface, and the image side surface S4 is a concave surface. The third lens E3 has negative refractive power, the object side surface S5 is a 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 negative refractive power, the object side surface S9 is a convex surface, and the image side surface S10 is a concave 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 seventh lens E7 has positive refractive power, the object side surface S13 is a convex surface, and the image side surface S14 is a concave surface. The eighth lens E8 has negative refractive power, the object side surface S15 is a concave surface, and the image side surface S16 is a concave surface. The filter E9 has an object side surface S17 and an image side surface S18. The optical imaging lens has an imaging surface S19, and light from an object sequentially passes through each surface S1 to S18 and is finally imaged on the imaging surface S19.

[0113] Table 7 shows the basic parameters of the optical imaging lens of Embodiment 4, wherein the units of the curvature radius and the thickness / distance are millimeters (mm). Tables 8-1 and 8-2 show the high-order term coefficients A4, A6, A8, A10 12 14 16 18 20 22 24 26 28 30 wherein each aspherical surface type can be defined by the formula (1) given in Embodiment 1 above.

[0114]

[0115]

[0116] Table 7

[0117] Face number A4 A6 A8 A10 A12 A14 A16 S1 -1.1043E-02 3.6032E-04 -1.2188E-03 2.7130E-04 -2.5937E-04 1.2677E-04 -8.1997E-05 S2 -3.2338E-02 4.0012E-03 7.2213E-05 -7.3899E-04 1.3629E-04 -2.1546E-04 1.0187E-04 S3 4.7835E-02 1.5457E-02 -6.1614E-04 4.0516E-04 -2.6510E-04 8.6285E-05 -9.6151E-05 S4 4.9961E-02 6.8164E-03 9.7659E-04 6.4162E-05 1.6047E-04 -9.0369E-05 4.9256E-05 S5 -1.4043E-01 1.3984E-03 1.2038E-03 1.0254E-03 -3.5657E-04 1.4392E-04 -1.0088E-04 S6 -1.6689E-01 1.4963E-02 7.5624E-04 1.1889E-03 -6.3849E-04 8.3427E-05 -4.1550E-05 S7 -2.2699E-01 1.6366E-02 -4.1234E-03 7.4925E-04 -8.0482E-04 9.7281E-05 -7.1045E-05 S8 -2.7051E-01 -3.4401E-04 -6.2097E-03 -7.8502E-04 -3.3920E-04 5.4172E-05 9.9291E-05 S9 -9.6680E-01 2.1386E-02 -4.4559E-03 7.5710E-03 -1.3689E-03 1.9606E-03 8.9616E-04 S10 -1.6746E+00 2.4318E-01 6.6087E-03 1.2541E-02 -9.3224E-03 5.3387E-03 2.2770E-03 S11 -3.3843E+00 3.7804E-01 -2.5538E-02 2.0979E-02 -2.4374E-02 1.4493E-02 4.9207E-04 S12 -2.3364E+00 4.9514E-01 -1.3019E-01 4.5777E-02 -1.5006E-02 1.2380E-02 -8.9590E-03 S13 -5.7588E+00 1.6020E+00 -5.6022E-01 8.5343E-02 4.2288E-02 -2.5840E-02 -2.7644E-03 S14 -3.1777E+00 1.9964E-01 3.2706E-03 -3.3109E-02 1.9295E-04 1.0144E-02 -5.4003E-03 S15 5.3135E+00 -1.2718E+00 5.5415E-01 -2.5607E-01 9.4924E-02 -4.4699E-02 4.9712E-03 S16 -2.4177E+00 3.5317E-01 -1.2721E-01 -1.8686E-02 5.5295E-02 -5.8653E-02 8.7857E-03

[0118] Table 8-1

[0119] Face number A18 A20 A22 A24 A26 A28 A30 S1 5.8683E-05 -4.5051E-05 2.7093E-05 -1.2418E-05 9.6808E-06 -7.3014E-06 1.7952E-06 S2 -7.7289E-05 5.3743E-05 -4.4978E-05 1.9770E-05 -1.9532E-05 1.9251E-05 -6.1145E-06 S3 4.4856E-05 -4.0612E-05 3.0361E-05 -1.6053E-05 1.6742E-05 -1.3808E-05 3.6410E-06 S4 -4.0572E-05 2.2714E-05 -1.9883E-05 1.0533E-05 -1.2863E-05 1.2203E-05 -3.9576E-06 S5 5.9870E-05 -3.5047E-05 2.3319E-05 -1.2345E-05 1.1468E-05 -1.0144E-05 2.8062E-06 S6 2.0798E-05 4.1857E-06 -4.6977E-06 -1.6980E-06 -3.5318E-06 5.0366E-06 -1.2893E-06 S7 3.2114E-05 -1.3229E-05 1.6674E-05 -9.5006E-06 7.9346E-06 -7.1970E-06 2.3305E-06 S8 2.8051E-05 4.5649E-05 4.2439E-06 1.0560E-05 -5.3001E-07 7.8393E-06 -2.6902E-06 S9 9.0323E-04 3.6100E-05 -1.4957E-05 -1.4533E-04 -6.4120E-05 -4.6388E-05 1.3454E-06 S10 1.4938E-03 -7.0589E-04 -1.5692E-04 -1.2726E-05 2.0947E-04 1.0821E-04 4.6952E-05 S11 1.9395E-03 -1.7741E-03 -8.0737E-05 -1.7476E-04 8.4273E-04 3.9698E-04 7.2952E-05 S12 4.6347E-03 5.5778E-05 3.5228E-04 -4.9084E-04 -5.6757E-05 -9.7185E-04 -3.7901E-04 S13 -7.8485E-03 1.8135E-03 -1.3541E-03 -1.9727E-03 3.6826E-03 -1.3342E-03 -6.6353E-05 S14 -8.1139E-04 -5.4242E-03 -2.7110E-03 -9.0265E-03 -6.5503E-04 6.6158E-04 1.3000E-03 S15 2.0508E-02 -2.4352E-02 9.2239E-03 -3.4576E-03 5.6894E-03 -3.4331E-03 8.5507E-04 S16 1.6498E-02 -1.5352E-02 4.0805E-03 -2.8415E-03 3.9241E-03 -4.4296E-03 1.9699E-03

[0120] Table 8-2

[0121] Figure 8A The axial chromatic aberration curve of the optical imaging lens of Embodiment 4 is shown, which represents the deviation of convergent focal points of light rays of different wavelengths after passing through the lens. Figure 8B The astigmatism curve of the optical imaging lens of Embodiment 4 is shown, which represents the meridional image curvature and sagittal image 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 lateral chromatic aberration curve of the optical imaging lens of Embodiment 4 is shown, which represents the deviation of light rays on the imaging plane after passing through the lens at different image heights. According to the formula (2), the lateral chromatic aberration curve of the optical imaging lens of Embodiment 4 is shown. Figures 8A to 8D It can be seen that the optical imaging lens given in Embodiment 4 can achieve good imaging quality.

[0122] Example 5

[0123] The optical imaging lens according to Embodiment 5 of the present application is described below with reference to 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.

[0124] As shown in Figure 9 , the optical imaging lens sequentially includes, along the optical axis from the object side to the image side, a stop STO, a first lens E1, a second lens E2, a third lens E3, a fourth lens E4, a fifth lens E5, a sixth lens E6, a seventh lens E7, an eighth lens E8, and a filter E9.​​​​​​​​​​

[0125] The first lens E1 has positive refractive power, with its object-side surface S1 being convex and its image-side surface S2 being concave. The second lens E2 has negative refractive power, with its object-side surface S3 being convex and its image-side surface S4 being concave. The third lens E3 has negative refractive power, with its object-side surface S5 being concave and its image-side surface S6 being concave. The fourth lens E4 has positive refractive power, with its object-side surface S7 being convex and its image-side surface S8 being convex. The fifth lens E5 has negative refractive power, with its object-side surface S9 being convex and its image-side surface S10 being concave. The sixth lens E6 has positive refractive power, with its object-side surface S11 being convex and its image-side surface S12 being concave. The seventh lens E7 has positive refractive power, with its object-side surface S13 being convex and its image-side surface S14 being concave. The eighth lens E8 has negative refractive power, with its object-side surface S15 being concave and its image-side surface S16 being convex. The filter E9 has an object-side surface S17 and an image-side surface S18. The optical imaging lens has an imaging surface S19, and light from the object passes sequentially through the surfaces S1 to S18 and is finally imaged on the imaging surface S19.

[0126] Table 9 shows the basic parameters of the optical imaging lens of Example 5, where the units for radius of curvature and thickness / distance are millimeters (mm). Tables 10-1 and 10-2 show the higher-order coefficients A4, A6, A8, and A6 that can be used for the aspherical mirrors S1 to S16 in Example 5. 10 A 12 A 14 A 16 A 18 A 20 A 22 A 24 A 26 A 28 and A 30 Each aspherical surface shape can be defined by formula (1) given in Example 1 above.

[0127]

[0128] Table 9

[0129]

[0130]

[0131] Table 10-1

[0132] Face number A18 A20 A22 A24 A26 A28 A30 S1 -1.3075E-04 -1.8101E-04 -4.1404E-05 -6.9150E-05 -1.6218E-05 -2.1014E-05 9.2244E-06 S2 -2.7730E-04 -6.4944E-05 -1.5914E-04 -3.9129E-05 -8.1998E-05 -3.0389E-05 -4.1303E-05 S3 4.3573E-05 -2.6281E-05 2.2587E-05 -1.5320E-05 7.2512E-06 -8.9693E-06 3.4733E-06 S4 -3.5092E-05 1.2247E-05 -1.5058E-05 4.1300E-06 -9.3338E-06 1.1503E-05 -3.1835E-06 S5 3.4113E-05 -4.1196E-05 2.1680E-05 -1.1963E-05 1.4970E-05 -9.1489E-06 2.0481E-06 S6 -1.0227E-06 -7.3370E-07 -3.9660E-06 1.4639E-06 -3.7736E-06 5.6548E-06 -1.4688E-06 S7 3.6294E-05 -3.1053E-05 1.5940E-05 -1.0679E-05 1.2926E-05 -1.0550E-05 3.0192E-06 S8 -1.8405E-05 1.5429E-05 -1.2409E-05 5.9067E-06 -9.4341E-06 7.1864E-06 -1.4342E-06 S9 1.6823E-04 -9.4315E-05 4.9047E-05 -2.3388E-05 1.4855E-05 -1.1009E-05 6.7572E-06 S10 6.6774E-04 -4.0708E-04 9.0584E-05 -6.1553E-05 3.8612E-05 -1.9856E-05 5.7654E-06 S11 1.1318E-03 -1.0980E-03 2.1432E-04 5.1167E-04 2.5166E-03 1.3756E-03 3.3232E-04 S12 -2.9806E-03 1.8434E-03 2.4134E-03 1.1620E-03 1.9399E-03 -7.9031E-04 -5.7857E-04 S13 -2.3466E-03 1.9510E-03 2.1386E-03 -3.6941E-03 8.8077E-04 -2.7795E-03 -1.4963E-03 S14 1.0779E-02 -3.8471E-03 7.3321E-04 -4.6054E-03 -1.8424E-03 -6.5418E-04 -1.9426E-04 S15 1.4355E-02 -2.3989E-02 6.5077E-03 -2.4959E-03 2.4398E-03 1.4402E-03 -8.6507E-04 S16 -3.1329E-03 -8.9257E-03 6.6087E-03 -5.7053E-03 8.6827E-04 -1.0810E-03 -3.3717E-04

[0133] Table 10-2

[0134] Figure 10AOn-axis chromatic aberration curves of the optical imaging lens of embodiment 5 are shown, which represent the deviation of convergent focal points of light rays of different wavelengths after passing through the lens. Figure 10B Astigmatism curves of the optical imaging lens of embodiment 5 are shown, which represent the meridional image curvature and sagittal image curvature. Figure 10C Distortion curves of the optical imaging lens of embodiment 5 are shown, which represent the distortion size values corresponding to different image heights. Figure 10D Magnification chromatic aberration curves of the optical imaging lens of embodiment 5 are shown, which represent the deviation of light rays on the imaging plane at different image heights after passing through the lens. According to Figures 10A to 10D It can be known that the optical imaging lens given in embodiment 5 can achieve good imaging quality.

[0135] Example 6

[0136] The following refers to Figures 11 to 12D An optical imaging lens according to embodiment 6 of the present application is described. Figure 11 A structure schematic diagram of the optical imaging lens according to embodiment 6 of the present application is shown.

[0137] As shown in Figure 11 the optical imaging lens sequentially includes, along the optical axis from the object side to the image side, a stop STO, a first lens E1, a second lens E2, a third lens E3, a fourth lens E4, a fifth lens E5, a sixth lens E6, a seventh lens E7, an eighth lens E8, and a filter E9.

[0138] 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 convex surface, and the image side surface S4 is a concave surface. The third lens E3 has negative refractive power, the object side surface S5 is a concave surface, and the image side surface S6 is a convex surface. The fourth lens E4 has 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 convex surface, and the image side surface S10 is a concave 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 seventh lens E7 has positive refractive power, the object side surface S13 is a convex surface, and the image side surface S14 is a concave surface. The eighth lens E8 has negative refractive power, the object side surface S15 is a concave surface, and the image side surface S16 is a convex surface. The filter E9 has an object side surface S17 and an image side surface S18. The optical imaging lens has an imaging surface S19, and light from an object sequentially passes through each surface S1 to S18 and is finally imaged on the imaging surface S19.

[0139] Table 11 shows the basic parameters of the optical imaging lens of Example 6, where the units for radius of curvature and thickness / distance are millimeters (mm). Tables 12-1 and 12-2 show the higher-order coefficients A4, A6, A8, and A6 that can be used for the aspherical mirrors S1 to S16 in Example 6. 10 A 12 A 14 A 16 A 18 A 20 A 22 A 24 A 26 A 28 and A 30 Each aspherical surface shape can be defined by formula (1) given in Example 1 above.

[0140]

[0141] Table 11

[0142]

[0143]

[0144] Table 12-1

[0145] Face number A18 A20 A22 A24 A26 A28 A30 S1 7.4776E-05 -4.4010E-05 7.2043E-05 7.2727E-07 4.3646E-05 -2.5908E-05 5.6644E-06 S2 -3.2639E-04 -1.5500E-04 -1.7445E-04 -6.5131E-05 -1.2565E-04 -9.3198E-06 -8.0881E-06 S3 1.5724E-05 -5.6058E-05 2.7794E-05 -1.2573E-05 -1.3291E-05 -2.8537E-05 2.5285E-05 S4 -4.2601E-05 1.9171E-05 -1.5573E-05 4.7982E-06 -8.8807E-06 1.1041E-05 -3.1748E-06 S5 3.9468E-05 -4.2380E-05 2.1524E-05 -1.1869E-05 1.4936E-05 -9.1074E-06 1.9950E-06 S6 -8.4490E-06 -1.7479E-06 -4.0702E-06 1.1131E-06 -3.9391E-06 5.6022E-06 -1.4040E-06 S7 3.3881E-05 -3.1433E-05 1.6777E-05 -1.0438E-05 1.3047E-05 -1.0631E-05 2.8712E-06 S8 -1.5236E-05 1.7373E-05 -1.3055E-05 5.4367E-06 -9.7303E-06 7.0858E-06 -1.3309E-06 S9 1.6306E-04 -1.0079E-04 4.9787E-05 -2.0511E-05 1.6573E-05 -9.1292E-06 8.3166E-06 S10 6.9150E-04 -3.9298E-04 9.1907E-05 -6.1313E-05 3.9766E-05 -1.9724E-05 6.0319E-06 S11 -5.4862E-04 -1.7848E-03 -2.8186E-04 3.7459E-04 2.2835E-03 1.3749E-03 6.2916E-04 S12 -2.7355E-03 3.4307E-03 2.7179E-03 1.2796E-03 1.8429E-03 -6.6137E-04 -4.3225E-04 S13 -1.2833E-03 6.1846E-04 1.5970E-03 -4.1746E-03 5.8328E-04 -2.8159E-03 -1.1010E-03 S14 1.0595E-02 -5.7424E-03 -1.9113E-05 -5.5161E-03 -1.6219E-03 -9.1912E-04 1.9060E-04 S15 1.4675E-02 -2.3084E-02 6.4474E-03 -2.6470E-03 2.0472E-03 9.2780E-04 -5.7315E-04 S16 -1.2344E-03 -9.8071E-03 6.9999E-03 -5.4312E-03 6.6217E-04 -1.1333E-03 -3.8847E-04

[0146] Table 12-2

[0147] Figure 12A The on-axis chromatic aberration curve of the optical imaging lens of Embodiment 6 is shown, which represents the deviation of light of different wavelengths from the convergence focal point after passing through the lens. Figure 12B The astigmatism curve of the optical imaging lens of Embodiment 6 is shown, which represents the meridional image plane curvature and the sagittal image plane curvature. Figure 12C The distortion curve of the optical imaging lens of Example 6 is shown, which represents the distortion magnitude value corresponding to different image heights. Figure 12D The magnification chromatic aberration curve of the optical imaging lens of Embodiment 6 is shown, which represents the deviation of different image heights on the imaging plane after light passes through the lens. According to Figures 12A to 12D It can be seen that the optical imaging lens given in Example 6 can achieve good imaging quality.

[0148] Furthermore, in Examples 1 to 6, the distance TTL from the object side of the first lens to the imaging surface of the optical imaging lens along the optical axis, half the diagonal length of the effective pixel area on the imaging surface ImgH, half the maximum field of view of the optical imaging lens Semi-FOV, the aperture number Fno of the optical imaging lens, the effective focal length f of the optical imaging lens, and the effective focal length values ​​f1 to f8 of each lens are shown in Table 13.

[0149]

[0150]

[0151] Table 13

[0152] Examples 1 to 6 respectively meet the conditions shown in Table 14.

[0153] Conditional expression / Example 1 2 3 4 5 6 TTL / ImgH 0.97 1.25 1.31 1.25 1.25 1.24 (f7-f6) / f 0.83 0.61 0.79 1.00 0.89 1.01 R7 / f 1.30 5.84 1.61 1.53 5.27 5.21 R15 / f8 0.55 0.49 0.51 0.57 0.51 0.51 R2 / R1 2.63 4.39 3.74 3.82 5.22 5.18 1 / (Npmax-N1) 5.65 5.99 5.65 5.35 5.99 6.19 CT4 / CT3 1.68 2.14 1.54 1.44 2.17 2.18 T12 / T34 1.60 1.95 1.94 2.09 1.56 1.28 Vp / f 2.51 2.38 2.44 2.35 2.35 2.38 |f4+f5+f6| / (R9+R10) 2.88 1.13 1.74 0.34 0.21 0.67 T45 / T56 1.41 1.73 1.47 1.71 1.87 1.96 (R13+R14) / f7 0.94 0.98 0.98 1.16 1.10 1.08 (CT1+CT4+CT6) / ∑CT 0.56 0.59 0.57 0.55 0.54 0.54 CT7 / (T67-T78) 2.30 0.98 1.92 0.48 2.43 3.06

[0154] Table 14

[0155] The present application also provides an imaging device provided with an electronic photosensitive element to image, which can be a Charge Coupled Device (CCD) or a Complementary Metal Oxide Semiconductor (CMOS). The imaging device can be a standalone imaging apparatus such as a digital camera, or an imaging module integrated on a mobile electronic device such as a mobile phone. The imaging device is equipped with the optical imaging lens described above.

[0156] The above description is merely preferred embodiments of the present application and a description of the principles of the technology used. Those skilled in the art should understand that the scope of protection of the present application is not limited to the technical solutions formed by the specific combinations of the technical features described above, and should also cover other technical solutions formed by any combinations of the technical features described above or their equivalent features without departing from the concept of the present application. For example, the technical solutions formed by mutually replacing the above-described features and the technical features disclosed in the present application (but not limited to) having similar functions.

Claims

1. An optical imaging lens, characterized in that, In order from the object side to the image side along the optical axis, the optical imaging lens comprises: a first lens, a second lens, a third lens, a fourth lens, a fifth lens, a sixth lens, a seventh lens, and an eighth lens, wherein The first lens has positive refractive power, a convex object side surface, and a concave image side surface; The second lens has negative refractive power, a convex object side surface, and a concave image side surface; The third lens has negative refractive power; The fourth lens has positive refractive power and a convex object side surface; The fifth lens has negative refractive power, a convex object side surface, and a concave image side surface; The sixth lens has positive refractive power, a convex object side surface, and a concave image side surface; The seventh lens has positive refractive power, a convex object side surface, and a concave image side surface; The eighth lens has negative refractive power and a concave object side surface; The number of lenses with refractive power in the optical imaging lens is eight; The optical imaging lens satisfies: 0.97≤TTL / ImgH≤1.31, and 0.61≤(f7-f6) / f≤1.01, wherein TTL is the distance from the object side surface of the first lens to the image plane of the optical imaging lens along the optical axis, ImgH is half of the diagonal length of the effective pixel area on the image plane, f7 is the effective focal length of the seventh lens, f6 is the effective focal length of the sixth lens, and f is the effective focal length of the optical imaging lens. 2.The optical imaging lens according to claim 1, wherein, The effective focal length f of the optical imaging lens and the radius of curvature R7 of the object side surface of the fourth lens satisfy: 1.30≤R7 / f≤5.

84. 3.The optical imaging lens according to claim 1, wherein, The first lens is a glass lens with aspheric object and image side surfaces, the Abbe number V1 of the first lens satisfies: 57.48≤V1≤75.69, and The radius of curvature R2 of the image side surface of the first lens and the radius of curvature R1 of the object side surface of the first lens satisfy: 2.63≤R2 / R1≤5.

22. 4.The optical imaging lens according to claim 1, wherein, Among the air gaps of any two adjacent lenses in the first to eighth lenses on the optical axis, the air gap T34 of the third and fourth lenses on the optical axis is the smallest, and the air gap T12 of the first and second lenses on the optical axis and the air gap T34 of the third and fourth lenses on the optical axis satisfy: 1.28≤T12 / T34≤2.

09.

5. The optical imaging lens according to claim 1, characterized in that, The central thickness CT4 of the fourth lens on the optical axis and the central thickness CT3 of the third lens on the optical axis satisfy: 1.44≤CT4 / CT3≤2.

18. 6.The optical imaging lens according to claim 1, wherein, The central thickness CT7 of the seventh lens on the optical axis, the air gap T67 of the sixth and seventh lenses on the optical axis, and the air gap T78 of the seventh and eighth lenses on the optical axis satisfy: 0.5<CT7 / (T67-T78)≤3.06, or CT7 / (T67-T78)=0.

48. 7.The optical imaging lens according to claim 1, wherein, An effective focal length f4 of the fourth lens, an effective focal length f5 of the fifth lens, an effective focal length f6 of the sixth lens, a curvature radius R9 of an object side surface of the fifth lens, and a curvature radius R10 of an image side surface of the fifth lens satisfy: 0.21≤|f4+f5+f6| / (R9+R10)≤2.

88. 8.The optical imaging lens according to claim 1, wherein, A minimum value Vp in a dispersion coefficient of the plastic lens among the first lens to the eighth lens and an effective focal length f of the optical imaging lens satisfy: 2.35≤Vp / f≤2.

51. 9.The optical imaging lens according to claim 3, wherein, A maximum value Npmax in a refractive index of the plastic lens in the optical imaging lens and a refractive index N1 of the first lens satisfy: 5.35≤1 / (Npmax-N1)≤6.

19.

10. The optical imaging lens according to any one of claims 1-9, wherein, A curvature radius R15 of an object side surface of the eighth lens and an effective focal length f8 of the eighth lens satisfy: 0.49≤R15 / f8≤0.

57.

11. The optical imaging lens according to any one of claims 1-9, wherein, An air separation T45 of the fourth lens and the fifth lens on the optical axis and an air separation T56 of the fifth lens and the sixth lens on the optical axis satisfy: 1.41≤T45 / T56≤1.

96.

12. The optical imaging lens according to any one of claims 1-9, wherein, A curvature radius R13 of an object side surface of the seventh lens, a curvature radius R14 of an image side surface of the seventh lens, and an effective focal length f7 of the seventh lens satisfy: 0.94≤(R13+R14) / f7≤1.

16.

13. The optical imaging lens according to any one of claims 1-9, wherein, The refractive index of the plastic lens among the first lens to the eighth lens is greater than 1.

5.

14. The optical imaging lens according to any one of claims 1-9, wherein, A central thickness CT1 of the first lens on the optical axis, a central thickness CT4 of the fourth lens on the optical axis, a central thickness CT6 of the sixth lens on the optical axis, and a sum ∑CT of the central thickness of each lens among the first lens to the eighth lens on the optical axis satisfy: 0.54≤(CT1+CT4+CT6) / ∑CT≤0.59.

Images