An optical imaging lens

Abstract

The present invention discloses an optical imaging lens, which includes, from the object side to the image side along the optical axis, a first lens with positive optical power; a second lens with negative optical power, whose object side surface is convex and whose image side surface is concave; a third lens with optical power; a fourth lens with positive optical power, whose image side surface is convex; a fifth lens with positive optical power, whose object side surface is convex; a sixth lens with positive optical power, whose object side surface is convex; and a seventh lens with negative optical power; wherein the axial distance TTL from the object side surface of the first lens to the imaging surface and the half of the diagonal length of the effective pixel area on the imaging surface ImgH satisfy: TTL / ImgH≤1.4; the effective focal length f of the optical imaging lens and the entrance pupil diameter EPD of the optical imaging lens satisfy: f / EPD<1.7. The optical imaging lens provided by the present invention has super large aperture, large image surface, ultra-thin ultra-clear high quality, and at the same time, each lens has a compact structure, good processing formability, high yield, and high practicality.

Description

Technical Field

[0001] The present invention belongs to the field of optical imaging, and in particular relates to an optical imaging lens comprising seven lenses. Background Art

[0002] In recent years, with the rapid development of smart terminals such as mobile phones and tablets, the camera function has become more and more a hot topic among mobile phone manufacturers of various brands. Large image surface, ultra-large aperture, ultra-thin ultra-clear mobile phone lenses are becoming increasingly popular, and consumers have higher and higher requirements for photo effects in dark environments such as at night.

[0003] Currently, the rear main cameras of mainstream flagship phones are mostly large-image-size ultra-clear cameras with an F number of 1.8 to 1.9. Generally, the smaller the F number, that is, the larger the aperture, the more light enters the lens, the better the shooting effect under night scenes, and the greater the design difficulty. Generally speaking, an F number less than 1.8 is a large aperture. The F number of the present invention is about 1.6, which is an ultra-large aperture, has a good night scene shooting effect, and can match a 1 / 1.73-inch sensor (CMOS), can achieve a wide range of shooting, and the invention is also an ultra-thin lens.

[0004] In order to meet the application requirements of ultra-large image area and ultra-thin cameras in highly integrated electronic devices, a super-large aperture, large image area, ultra-thin, ultra-clear, high-quality photographic lens group is needed. At the same time, each lens has a compact structure, good processability, improved yield, and high practicality. Summary of the invention

[0005] The present invention aims to provide an optical imaging lens composed of seven lenses, which has an ultra-large aperture, a large image surface, and an ultra-thin ultra-clear high-quality photographic lens group. At the same time, each lens has a compact structure, good processability, high yield, and high practicality.

[0006] One aspect of the present invention provides an optical imaging lens, which includes, in order from the object side to the image side along the optical axis: a first lens having positive optical power; a second lens having negative optical power, whose object-side surface is convex and whose image-side surface is concave; a third lens having optical power; a fourth lens having positive optical power, whose image-side surface is convex; a fifth lens having positive optical power, whose object-side surface is convex; a sixth lens having positive optical power, whose object-side surface is convex; and a seventh lens having negative optical power.

[0007] Among them, the effective focal length f of the optical imaging lens and the entrance pupil diameter EPD of the optical imaging lens satisfy: f / EPD<1.7.

[0008] According to one embodiment of the present invention, the axial distance TTL from the object side of the first lens to the imaging plane and half the diagonal length of the effective pixel area on the imaging plane ImgH satisfy the following: TTL / ImgH≤1.4.

[0009] According to one embodiment of the present invention, the effective focal length f1 of the first lens and half of the diagonal length of the effective pixel area on the imaging surface ImgH satisfy the following conditions: 0.9 <f1 / ImgH<1.3。

[0010] According to one embodiment of the present invention, the effective focal length f2 of the second lens, the curvature radius R4 of the image side surface of the second lens, and the curvature radius R3 of the object side surface of the second lens satisfy: 1.8 <f2 / (R4-R3)<7.8。

[0011] According to one embodiment of the present invention, the effective focal length f4 of the fourth lens and the effective focal length f5 of the fifth lens satisfy: -1.0<(f4-f5) / (f4+f5)<1.0.

[0012] According to one embodiment of the present invention, the effective focal length f of the optical imaging lens, the effective focal length f6 of the sixth lens, and the effective focal length f7 of the seventh lens satisfy: 0.8 <f / (f6+f7)<2.0。

[0013] According to one embodiment of the present invention, the center thickness CT1 of the first lens on the optical axis, 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: 0.7 <CT1 / (CT3+CT4)<1.2。

[0014] According to one embodiment of the present invention, the curvature radius R2 of the image side surface of the first lens and the curvature radius R1 of the object side surface of the first lens satisfy: 5.0 <R2 / R1<8.0。

[0015] According to one embodiment of the present invention, the maximum field of view FOV of the optical imaging lens satisfies: 75° <FOV<85°。

[0016] According to one embodiment of the present invention, the combined focal length f12 of the first and second lenses and the combined focal length f67 of the sixth and seventh lenses satisfy: -1.5 <f12 / f67<-0.2。

[0017] According to one embodiment of the present invention, the on-axis distance SAG71 between the intersection of the seventh lens object side and the optical axis to the effective radius vertex of the seventh lens object side and the on-axis distance SAG51 between the intersection of the fifth lens object side and the optical axis to the effective radius vertex of the fifth lens object side meet the following conditions: 1.6 <SAG71 / SAG51<2.2。

[0018] According to one embodiment of the present invention, the on-axis distance SAG62 between the intersection of the image side surface of the sixth lens and the optical axis to the vertex of the effective radius of the image side surface of the sixth lens and the on-axis distance SAG61 between the intersection of the object side surface of the sixth lens and the optical axis to the vertex of the effective radius of the object side surface of the sixth lens satisfy: 0.8 <SAG62 / SAG61<1.8。

[0019] According to one embodiment of the present invention, the center thickness CT4 of the fourth lens on the optical axis and the edge thickness ET4 of the fourth lens satisfy: 1.7 <CT4 / ET4<2.5。

[0020] According to one embodiment of the present invention, an edge thickness ET6 of the sixth lens, an edge thickness ET7 of the seventh lens, and an edge thickness ET5 of the fifth lens satisfy: 1.1<(ET6+ET7) / ET5<2.2.

[0021] Another aspect of the present invention provides an optical imaging lens, which includes, in order from the object side to the image side along the optical axis: a first lens having positive optical power; a second lens having negative optical power, whose object-side surface is convex and whose image-side surface is concave; a third lens having optical power; a fourth lens having positive optical power, whose image-side surface is convex; a fifth lens having positive optical power, whose object-side surface is convex; a sixth lens having positive optical power, whose object-side surface is convex; and a seventh lens having negative optical power.

[0022] Among them, each lens is independent of each other, and there is an air gap between each lens on the optical axis; the effective focal length f1 of the first lens and half of the diagonal length of the effective pixel area on the imaging surface ImgH satisfy: 0.9 <f1 / ImgH<1.3。

[0023] Beneficial effects of the present invention:

[0024] The optical imaging lens provided by the present invention comprises a plurality of lenses, such as the first lens to the seventh lens. The optical imaging lens of the present invention has an ultra-large aperture, a large image surface, ultra-thin, ultra-clear and high quality, and each lens has a compact structure, good processability, high yield and high practicality. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0026] Figure 1 Schematic diagram of the structure of a lens assembly of an optical imaging lens embodiment 1 of the present invention;

[0027] Figure 2a to Figure 2d They are respectively an axial chromatic aberration curve, an astigmatism curve, a distortion curve, and a magnification chromatic aberration curve of the optical imaging lens embodiment 1 of the present invention;

[0028] Figure 3 Schematic diagram of the lens group structure of Embodiment 2 of the optical imaging lens of the present invention;

[0029] Figures 4a to 4d They are respectively an axial chromatic aberration curve, an astigmatism curve, a distortion curve, and a magnification chromatic aberration curve of Example 2 of the optical imaging lens of the present invention;

[0030] Figure 5 Schematic diagram of the lens group structure of Embodiment 3 of the optical imaging lens of the present invention;

[0031] Figures 6a to 6d They are respectively an axial chromatic aberration curve, an astigmatism curve, a distortion curve, and a magnification chromatic aberration curve of Example 3 of the optical imaging lens of the present invention;

[0032] Figure 7 Schematic diagram of the lens group structure of Embodiment 4 of the optical imaging lens of the present invention;

[0033] Figures 8a to 8d They are respectively an axial chromatic aberration curve, an astigmatism curve, a distortion curve, and a magnification chromatic aberration curve of Example 4 of the optical imaging lens of the present invention;

[0034] Fig. 9 Schematic diagram of the lens group structure of Embodiment 5 of the optical imaging lens of the present invention;

[0035] Figures 10a to 10d They are respectively an axial chromatic aberration curve, an astigmatism curve, a distortion curve, and a magnification chromatic aberration curve of Example 5 of the optical imaging lens of the present invention;

[0036] Fig.11 Schematic diagram of the structure of a lens group of an optical imaging lens embodiment 6 of the present invention;

[0037] Figures 12a to 12d They are respectively an axial chromatic aberration curve, an astigmatism curve, a distortion curve, and a magnification chromatic aberration curve of Example 6 of the optical imaging lens of the present invention;

[0038] Fig.13 Schematic diagram of the structure of a lens group of an optical imaging lens embodiment 7 of the present invention;

[0039] Figures 14a to 14d They are respectively the axial chromatic aberration curve, the astigmatism curve, the distortion curve and the magnification chromatic aberration curve of the optical imaging lens embodiment 7 of the present invention. DETAILED DESCRIPTION

[0040] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0041] 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 invention, the first lens discussed below may also be referred to as the second lens or the third lens.

[0042] 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.

[0043] 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.

[0044] In the description of the present invention, 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.

[0045] 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 way unless explicitly defined in this article.

[0046] It should be noted that, in the absence of conflict, the embodiments of the present invention and the features in the embodiments can be combined with each other. The features, principles and other aspects of the present invention will be described in detail below with reference to the drawings and in combination with the embodiments.

[0047] Exemplary Embodiments

[0048] The optical imaging lens of an exemplary embodiment of the present invention includes seven lenses, which 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 and a seventh lens, wherein each lens is independent of each other and has an air gap between each lens on the optical axis.

[0049] In this exemplary embodiment, the first lens has positive power; the second lens has negative power, its object side surface is convex, and its image side surface is concave; the third lens may have positive power or negative power; the fourth lens has positive power, and its image side surface is convex; the fifth lens has positive power, and its object side surface is convex; the sixth lens has positive power, and its object side surface is convex; and the seventh lens has negative power. The first lens has positive power and mainly functions to converge light; the second lens has negative power, and its object side surface is convex, and its image side surface is concave, and mainly functions to correct spherical aberration; the fourth lens has positive power, and its image side surface is convex, and mainly functions to correct meridional coma and spherical aberration; the fifth lens has positive power, and its object side surface is convex, and mainly functions to correct meridional coma, astigmatism and distortion; the sixth lens has positive power, and its object side surface is convex, and mainly functions to correct meridional coma, astigmatism and distortion; the seventh lens has negative power and mainly functions to correct meridional astigmatism and distortion.

[0050] In this exemplary embodiment, the on-axis distance TTL from the object side of the first lens to the imaging surface and half of the diagonal length of the effective pixel area on the imaging surface ImgH satisfy the condition: TTL / ImgH≤1.4. TTL / ImgH<1.4 is conducive to realizing the ultra-large image plane and ultra-thinness of the photographic lens structure, ensuring that the lens has an ultra-large image plane while shortening the total length of the system to achieve an ultra-thin structure of the lens. More specifically, TTL and ImgH satisfy: TTL / ImgH=1.40.

[0051] In this exemplary embodiment, the effective focal length f of the optical imaging lens and the entrance pupil diameter EPD of the optical imaging lens satisfy the conditional expression: f / EPD<1.7. This expression is the F number, which ensures the ultra-large aperture of the optical system. More specifically, f and EPD satisfy: f / EPD=1.65.

[0052] In this exemplary embodiment, the conditional expression satisfied by the effective focal length f1 of the first lens and half of the diagonal length ImgH of the effective pixel region on the imaging surface is: 0.9 < f1 / ImgH < 1.3. Reasonably controlling this expression is beneficial to the distribution of the optical power of the first lens and the overall structural layout of the lens. More specifically, f1 and ImgH satisfy: 1.00 ≤ f1 / ImgH ≤ 1.05.

[0053] In this exemplary embodiment, the conditional expression satisfied by the effective focal length f2 of the second lens, the radius of curvature R4 of the image side of the second lens, and the radius of curvature R3 of the object side of the second lens is: 1.8 < f2 / (R4 - R3) < 7.8. Reasonably controlling this expression is beneficial to the processing formability of the second lens and, at the same time, beneficial to reducing the aberration of the camera lens. More specifically, f2, R4, and R3 satisfy: 1.91 ≤ f2 / (R4 - R3) ≤ 7.62.

[0054] In this exemplary embodiment, the conditional expression satisfied by the effective focal length f4 of the fourth lens and the effective focal length f5 of the fifth lens is:

[0055] -1.0 < (f4 - f5) / (f4 + f5) < 1.0. Reasonably controlling this expression is beneficial to reducing the aberration of the optical system. More specifically, f4 and f5 satisfy: -0.62 ≤ (f4 - f5) / (f4 + f5) ≤ 0.64.

[0056] In this exemplary embodiment, the conditional expression satisfied by the effective focal length f of the optical imaging lens, the effective focal length f6 of the sixth lens, and the effective focal length f7 of the seventh lens is: 0.8 < f / (f6 + f7) < 2.0. By reasonably distributing the combined optical power of the sixth and seventh lenses, it is beneficial to the reasonable spatial distribution of the optical power of each lens and beneficial to reducing the aberration of the photographic lens. More specifically, f, f6, and f7 satisfy: 0.98 ≤ f / (f6 + f7) ≤ 1.92.

[0057] In this exemplary embodiment, the conditional expression satisfied by the central thickness CT1 of the first lens on the optical axis, the central thickness CT3 of the third lens on the optical axis, and the central thickness CT4 of the fourth lens on the optical axis is: 0.7 < CT1 / (CT3 + CT4) < 1.2. Reasonably controlling this expression is beneficial to avoiding the influence of excessive lens thickness on the spatial distribution of the lenses and facilitating the assembly of the photographic lens. More specifically, CT1, CT3, and CT4 satisfy: 0.86 ≤ CT1 / (CT3 + CT4) ≤ 1.09.

[0058] In this exemplary embodiment, the conditional expression satisfied by 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 is: 5.0 < R2 / R1 < 8.0. Reasonably controlling this expression is beneficial to reasonably adjusting the contribution amount of the first lens to the aberration of the photographic lens. More specifically, R2 and R1 satisfy: 5.71 ≤ R2 / R1 ≤ 7.50.

[0059] In this exemplary embodiment, the conditional expression satisfied by the maximum field of view FOV of the optical imaging lens is: 75° < FOV < 85°. Reasonably controlling this expression is beneficial to ensuring that the specifications of the lens match the super large aperture and large image plane. More specifically, FOV satisfies: 79.63° ≤ FOV ≤ 80.82°.

[0060] In this exemplary embodiment, the conditional expression satisfied by the combined focal length f12 of the first and second lenses and the combined focal length f67 of the sixth and seventh lenses is: -1.5 < f12 / f67 < -0.2. By reasonably distributing the combined optical power of the first and second lenses and the sixth and seventh lenses, it is beneficial to the reasonable spatial distribution of the optical power of each lens and is beneficial to reducing the aberration of the photographic lens. More specifically, f12 and f67 satisfy: -1.33 ≤ f12 / f67 ≤ -0.34.

[0061] In this exemplary embodiment, the conditional expression satisfied by the axial distance SAG71 between the intersection of the object side surface of the seventh lens and the optical axis and the vertex of the effective radius of the object side surface of the seventh lens and the axial distance SAG51 between the intersection of the object side surface of the fifth lens and the optical axis and the vertex of the effective radius of the object side surface of the fifth lens is: 1.6 < SAG71 / SAG51 < 2.2. Reasonably controlling the sagittal height ratio of the image side surface of the seventh lens to the image side surface of the fifth lens is beneficial to restricting the bending degree of the lens and reducing the processing and forming difficulty of the lens. More specifically, SAG71 and SAG51 satisfy: 1.73 ≤ SAG71 / SAG51 ≤ 2.00.

[0062] In this exemplary embodiment, the conditional expression satisfied by the axial distance SAG62 between the intersection of the image side surface of the sixth lens and the optical axis and the vertex of the effective radius of the image side surface of the sixth lens and the axial distance SAG61 between the intersection of the object side surface of the sixth lens and the optical axis and the vertex of the effective radius of the object side surface of the sixth lens is: 0.8 < SAG62 / SAG61 < 1.8. Reasonably controlling the sagittal height ratio of the image side surface of the sixth lens to the object side surface is beneficial to controlling the bending shapes of the two surfaces of the sixth lens and is beneficial to correcting aberrations. More specifically, SAG62 and SAG61 satisfy: 1.03 ≤ SAG62 / SAG61 ≤ 1.75.

[0063] In the present exemplary embodiment, the conditional expression satisfied by the central thickness CT4 of the fourth lens on the optical axis and the edge thickness ET4 of the fourth lens is: 1.7 < CT4 / ET4 < 2.5. Reasonably controlling the ratio of the central thickness to the edge thickness of the fourth lens is beneficial to the processing and forming of the fourth lens. More specifically, CT4 and ET4 satisfy: 1.96 ≤ CT4 / ET4 ≤ 2.31.

[0064] In the present exemplary embodiment, the conditional expression satisfied by the edge thickness ET6 of the sixth lens, the edge thickness ET7 of the seventh lens, and the edge thickness ET5 of the fifth lens is: 1.1 < (ET6 + ET7) / ET5 < 2.2. Reasonably controlling this expression is beneficial to the overall structural layout of the lens. More specifically, ET6, ET7, and ET5 satisfy: 1.14 ≤ (ET6 + ET7) / ET5 ≤ 1.59.

[0065] In the present exemplary embodiment, the above optical imaging lens may further include a diaphragm. The diaphragm can be disposed at an appropriate position as needed. For example, the diaphragm can be disposed between the object side and the first lens. Optionally, the above optical imaging lens may further include a filter for correcting color deviation and / or a protective glass for protecting the photosensitive element located on the imaging surface.

[0066] The optical imaging lens according to the above embodiment of the present invention may employ multiple lenses, such as the above seven lenses. By reasonably distributing the optical power, surface shape, central thickness of each lens, and the axial spacing between each lens, etc., the optical imaging lens has a large imaging image plane, has the characteristics of a wide imaging range and high imaging quality, and ensures the ultra-thinness of the mobile phone.

[0067] In the exemplary embodiment, at least one of the lens surfaces of each lens is an aspherical lens surface, that is, at least one of the lens surfaces from the object side surface of the first lens to the image side surface of the seventh lens is an aspherical lens surface. The characteristics of an aspherical lens are: from the center of the lens to the periphery of the lens, the curvature changes continuously. Different from a spherical lens with a constant curvature from the center of the lens to the periphery of the lens, an aspherical lens has better curvature radius characteristics and has the advantages of improving distortion aberration and improving astigmatism aberration. After using an aspherical lens, it is possible to eliminate as much as possible the aberration that appears during imaging, 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, and the seventh lens is an aspherical lens surface. Optionally, both 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, and the seventh lens are aspherical lens surfaces.

[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 seven lenses are described as an example in the embodiments, the optical imaging lens is not limited to including seven lenses, and the optical imaging lens may also include other numbers of lenses if necessary.

[0069] Specific embodiments of the optical imaging lens applicable to the above embodiments are further described below with reference to the accompanying drawings. Specific embodiment 1

[0071] Figure 1 1 is a schematic diagram of the structure of a lens group of an optical imaging lens embodiment 1 of the present invention. 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 sixth lens E6, a seventh lens E7, a filter E8 and an imaging surface S17.

[0072] 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 convex, 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 positive focal power, and its object side surface S9 is convex, and its image side surface S10 is convex. The sixth lens E6 has positive focal power, and its object side surface S11 is convex, and its image side surface S12 is convex. The seventh lens E7 has negative focal power, and its object side surface S13 is concave, and its image side surface S14 is concave. The filter E8 has an object side surface S15 and an image side surface S16. The light from the object passes through each surface of the surfaces S1 to S16 in sequence and is finally imaged on the imaging surface S17.

[0073] As shown in Table 1, it is a basic parameter table of the optical imaging lens of Example 1, wherein the units of the radius of curvature, thickness, and focal length are all millimeters (mm).

[0074] Face number Surface type Radius of curvature Thickness / distance focal length Refractive Index Dispersion coefficient Cone coefficient OBJ Spherical endless endless STO Spherical endless -0.5939 S1 Aspheric 2.3483 0.8949 5.05 1.54 56.1 0.0000 S2 Aspheric 13.7815 0.0645 0.0000 S3 Aspheric 4.3927 0.2796 -12.19 1.67 19.2 0.0000 S4 Aspheric 2.7936 0.6042 0.0000 S5 Aspheric 11.2485 0.2570 -30.06 1.67 19.2 0.0000 S6 Aspheric 7.1798 0.0804 0.0000 S7 Aspheric -64.2959 0.7873 35.54 1.54 56.1 0.0000 S8 Aspheric -14.9588 0.3333 0.0000 S9 Aspheric 6.1180 0.4837 7.68 1.57 37.3 0.0000 S10 Aspheric -14.9953 0.6110 0.0000 S11 Aspheric 14.7912 0.4000 8.79 1.54 56.1 0.0000 S12 Aspheric -7.0247 0.3292 0.0000 S13 Aspheric -9.5670 0.4200 -3.15 1.54 55.7 0.0000 S14 Aspheric 2.0831 0.2510 -0.9400 S15 Spherical endless 0.2100 1.52 64.2 S16 Spherical endless 0.7138 S17 Spherical endless

[0075] Table 1

[0076] As shown in Table 2, in Example 1, the total effective focal length of the optical imaging lens is f=5.52 mm, the distance TTL on the optical axis from the object-side surface S1 of the first lens E1 to the imaging surface S17 is 6.72 mm, half of the diagonal length of the effective pixel area on the imaging surface S17 is ImgH=4.80 mm, and the maximum field of view FOV of the optical imaging system is 80.82°.

[0077]

[0078]

[0079] Table 2

[0080] The optical imaging lens in Example 1 satisfies:

[0081] TTL / ImgH=1.40, where TTL is the axial distance from the object side of the first lens to the imaging surface, and ImgH is half of the diagonal length of the effective pixel area on the imaging surface;

[0082] f / EPD=1.65, where f is the effective focal length of the optical imaging lens and EPD is the entrance pupil diameter of the optical imaging lens;

[0083] f1 / ImgH=1.05, where f1 is the effective focal length of the first lens, and ImgH is half of the diagonal length of the effective pixel area on the imaging surface;

[0084] f2 / (R4-R3)=7.62, where f2 is the effective focal length of the second lens, R4 is the radius of curvature of the image side of the second lens, and R3 is the radius of curvature of the object side of the second lens;

[0085] (f4-f5) / (f4+f5)=0.64, where f4 is the effective focal length of the fourth lens, and f5 is the effective focal length of the fifth lens;

[0086] f / (f6+f7)=0.98, where f is the effective focal length of the optical imaging lens, f6 is the effective focal length of the sixth lens, and f7 is the effective focal length of the seventh lens;

[0087] CT1 / (CT3+CT4)=0.86, where CT1 is the center thickness of the first lens on the optical axis, CT3 is the center thickness of the third lens on the optical axis, and CT4 is the center thickness of the fourth lens on the optical axis;

[0088] R2 / R1=5.87, where R2 is the radius of curvature of the image side of the first lens, and R1 is the radius of curvature of the object side of the first lens;

[0089] FOV = 80.82°, where FOV is the maximum field of view of the optical imaging lens;

[0090] f12 / f67=-1.33, where f12 is the combined focal length of the first and second lenses, and f67 is the combined focal length of the sixth and seventh lenses;

[0091] SAG71 / SAG51=2.00, where SAG71 is the on-axis distance between the intersection of the seventh lens object side and the optical axis to the vertex of the effective radius of the seventh lens object side, and SAG51 is the on-axis distance between the intersection of the fifth lens object side and the optical axis to the vertex of the effective radius of the fifth lens object side;

[0092] SAG62 / SAG61=1.03, wherein SAG62 is the on-axis distance between the intersection of the image side surface of the sixth lens and the optical axis to the vertex of the effective radius of the image side surface of the sixth lens, and SAG61 is the on-axis distance between the intersection of the object side surface of the sixth lens and the optical axis to the vertex of the effective radius of the object side surface of the sixth lens;

[0093] CT4 / ET4=2.31, where CT4 is the center thickness of the fourth lens on the optical axis, and ET4 is the edge thickness of the fourth lens;

[0094] (ET6+ET7) / ET5=1.59, wherein ET6 is the edge thickness of the sixth lens, ET7 is the edge thickness of the seventh lens, and ET5 is the edge thickness of the fifth lens.

[0095] In Example 1, the object side surface and the image side surface of any lens among the first lens E1 to the seventh lens E7 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:

[0096]

[0097] 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); k is the cone coefficient; Ai is the correction coefficient of the i-th order aspheric surface.

[0098] In Example 1, the object side surface and the image side surface of any one of the first lens E1 to the seventh lens E7 are aspherical surfaces. Table 3 shows 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, A5 10 , A 12 , A 14 , A 16 , A 18 , A 20 , A 22 , A 24 , A 26 , A 28 and A 30 .

[0099] Face number A4 A6 A8 A10 A12 A14 A16 S1 -2.1047E-03 1.1046E-02 -2.3919E-02 3.1370E-02 -2.5968E-02 1.3622E-02 -4.3940E-03 S2 -6.0920E-02 1.1438E-01 -1.3685E-01 1.1585E-01 -6.9137E-02 2.8210E-02 -7.4761E-03 S3 -8.7622E-02 1.3086E-01 -1.2725E-01 8.3226E-02 -3.0508E-02 2.0707E-03 3.0723E-03 S4 -4.0814E-02 4.0084E-02 6.3720E-03 -7.3652E-02 1.1396E-01 -9.3900E-02 4.5074E-02 S5 -5.5424E-02 -1.3889E-02 1.1281E-02 -2.9098E-02 4.6851E-02 -4.8786E-02 2.9288E-02 S6 -5.1252E-02 -1.0554E-02 -1.8223E-03 -5.7065E-04 8.9686E-03 -9.4234E-03 4.5475E-03 S7 -2.5448E-02 2.6433E-02 -6.1211E-02 7.2672E-02 -4.4367E-02 1.5395E-02 -3.0588E-03 S8 -6.4191E-02 8.4765E-02 -2.1074E-01 3.4622E-01 -3.7895E-01 2.8672E-01 -1.5113E-01 S9 -4.7331E-02 1.0357E-01 -2.3855E-01 3.3109E-01 -3.2533E-01 2.3398E-01 -1.2482E-01 S10 -1.3034E-02 6.1104E-02 -1.2429E-01 1.1799E-01 -6.6144E-02 1.9550E-02 2.0905E-04 S11 4.7845E-02 1.0247E-01 -3.1112E-01 3.8320E-01 -3.2058E-01 1.8888E-01 -7.8415E-02 S12 1.7670E-01 -3.3308E-03 -1.2928E-01 1.1116E-01 -5.3269E-02 1.7939E-02 -4.6201E-03 S13 -2.1992E-02 2.6047E-02 -5.1813E-02 4.8886E-02 -2.5043E-02 7.9612E-03 -1.6946E-03 S14 -1.6258E-01 1.0738E-01 -7.7519E-02 4.2110E-02 -1.5576E-02 3.9916E-03 -7.2900E-04 Face number A18 A20 A22 A24 A26 A28 A30 S1 7.9313E-04 -6.1373E-05 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 S2 1.1620E-03 -8.0855E-05 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 S3 -1.1782E-03 1.3907E-04 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 S4 -1.1865E-02 1.3366E-03 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 S5 -9.1594E-03 1.1806E-03 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 S6 -1.0553E-03 9.8009E-05 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 S7 3.2304E-04 -1.4062E-05 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 S8 5.5118E-02 -1.3607E-02 2.1668E-03 -2.0056E-04 8.1825E-06 0.0000E+00 0.0000E+00 S9 4.9882E-02 -1.4940E-02 3.3078E-03 -5.2469E-04 5.6271E-05 -3.6452E-06 1.0742E-07 S10 -2.6821E-03 1.1575E-03 -2.6744E-04 3.8068E-05 -3.3463E-06 1.6737E-07 -3.6556E-09 S11 2.3126E-02 -4.8726E-03 7.2967E-04 -7.5946E-05 5.2259E-06 -2.1374E-07 3.9330E-09 S12 9.3330E-04 -1.4618E-04 1.7173E-05 -1.4430E-06 8.1046E-08 -2.7072E-09 4.0486E-11 S13 2.5162E-04 -2.6532E-05 1.9850E-06 -1.0323E-07 3.5531E-09 -7.2837E-11 6.7367E-13 S14 9.6509E-05 -9.2942E-06 6.4457E-07 -3.1339E-08 1.0128E-09 -1.9522E-11 1.6970E-13

[0100] Table 3

[0101] 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. Figure 2a to Figure 2d It can be seen from the figure that the optical imaging lens provided in Example 1 can achieve good imaging quality. Specific embodiment 2

[0103] Figure 3 2 is a schematic diagram of the lens group structure of an optical imaging lens embodiment 2 of the present invention. The optical imaging lens includes, 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 sixth lens E6, a seventh lens E7, a filter E8 and an imaging surface S17.

[0104] 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 convex, and its image side surface S4 is concave. The third lens E3 has positive 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 positive focal power, and its object side surface S9 is convex, and its image side surface S10 is concave. The sixth lens E6 has positive focal power, and its object side surface S11 is convex, and its image side surface S12 is concave. The seventh lens E7 has negative focal power, and its object side surface S13 is convex, and its image side surface S14 is concave. The filter E8 has an object side surface S15 and an image side surface S16. The light from the object passes through each surface of the surfaces S1 to S16 in sequence and is finally imaged on the imaging surface S17.

[0105] As shown in Table 4, it is a basic parameter table of the optical imaging lens of Example 2, wherein the units of the radius of curvature, thickness, and focal length are all millimeters (mm).

[0106] Face number Surface type Radius of curvature Thickness / distance focal length Refractive Index Dispersion coefficient Cone coefficient OBJ Spherical endless 2400.0000 STO Spherical endless -0.7221 S1 Aspheric 2.3072 0.9428 4.82 1.54 56.1 0.0000 S2 Aspheric 16.0523 0.1194 0.0000 S3 Aspheric 8.3601 0.3838 -9.24 1.67 19.2 0.0000 S4 Aspheric 3.5137 0.4513 0.0000 S5 Aspheric 12.5807 0.2936 99.79 1.66 20.4 0.0000 S6 Aspheric 15.3673 0.2036 0.0000 S7 Aspheric -55.2620 0.6005 35.05 1.54 56.1 0.0000 S8 Aspheric -14.2591 0.4841 0.0000 S9 Aspheric 8.7241 0.3706 78.66 1.57 37.3 0.0000 S10 Aspheric 10.6628 0.2134 0.0000 S11 Aspheric 4.1912 0.4033 8.24 1.54 56.1 0.0000 S12 Aspheric 60.3111 0.7066 0.0000 S13 Aspheric 8.1733 0.4200 -4.53 1.54 55.7 0.0000 S14 Aspheric 1.8389 0.2122 -0.8981 S15 Spherical endless 0.2100 1.52 64.2 S16 Spherical endless 0.6926 S17 Spherical endless

[0107] Table 4

[0108] As shown in Table 5, in Example 2, the total effective focal length of the optical imaging lens f=5.60 mm, the distance TTL from the object side surface S1 of the first lens E1 to the imaging surface S17 on the optical axis=6.71 mm, half of the diagonal length of the effective pixel area on the imaging surface S17 ImgH=4.80 mm, and the maximum field of view FOV of the optical imaging system=79.65°. The parameters of each relational expression are as explained in the first embodiment, and the values ​​of each relational expression are listed in the following table.

[0109]

[0110] Table 5

[0111] In Example 2, the object side surface and the image side surface of any one of the first lens E1 to the seventh lens E7 are aspherical surfaces. Table 6 shows 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, A5 10 , A 12 , A 14 , A 16 , A 18 , A 20 , A 22 , A 24 , A 26 , A 28 and A 30 .

[0112]

[0113]

[0114] Table 6

[0115] 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. Figures 4a to 4d It can be seen from the figure that the optical imaging lens provided in Example 2 can achieve good imaging quality. Specific embodiment 3

[0117] Figure 52 is a schematic diagram of the lens group structure of Embodiment 3 of the optical imaging lens of the present invention. The optical imaging lens comprises, 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 sixth lens E6, a seventh lens E7, a filter E8 and an imaging surface S17.

[0118] The first lens E1 has positive power, and its object side surface S1 is convex, and its image side surface S2 is concave. The second lens E2 has negative power, and its object side surface S3 is convex, and its image side surface S4 is concave. The third lens E3 has negative power, and its object side surface S5 is convex, and its image side surface S6 is concave. The fourth lens E4 has positive power, and its object side surface S7 is concave, and its image side surface S8 is convex. The fifth lens E5 has positive power, and its object side surface S9 is convex, and its image side surface S10 is concave. The sixth lens E6 has positive power, and its object side surface S11 is convex, and its image side surface S12 is concave. The seventh lens E7 has negative power, and its object side surface S13 is convex, and its image side surface S14 is concave. The filter E8 has an object side surface S15 and an image side surface S16. The light from the object passes through each surface of the surfaces S1 to S16 in sequence and is finally imaged on the imaging surface S17.

[0119] As shown in Table 7, it is a basic parameter table of the optical imaging lens of Example 3, wherein the units of the radius of curvature, thickness, and focal length are all millimeters (mm).

[0120]

[0121]

[0122] Table 7

[0123] As shown in Table 8, in Example 3, the total effective focal length of the optical imaging lens f=5.59 mm, the distance TTL from the object side surface S1 of the first lens E1 to the imaging surface S17 on the optical axis=6.71 mm, half of the diagonal length of the effective pixel area on the imaging surface S17 ImgH=4.80 mm, and the maximum field of view FOV of the optical imaging system=79.83°. The parameters of each relational expression are as explained in the first embodiment, and the values ​​of each relational expression are listed in the following table.

[0124]

[0125] Table 8

[0126] In Example 3, the object side surface and the image side surface of any one of the first lens E1 to the seventh lens E7 are aspherical surfaces. Table 9 shows 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, A5 10 , A 12 , A14 , A 16 , A 18 , A 20 , A 22 , A 24 , A 26 , A 28 and A 30 .

[0127]

[0128]

[0129] Table 9

[0130] Figure 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. Figure 6d The 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. Figures 6a to 6d It can be seen from the figure that the optical imaging lens provided in Example 3 can achieve good imaging quality. Specific embodiment 4

[0132] Figure 7 Schematic diagram of the lens group structure of embodiment 4 of the optical imaging lens of the present invention. The optical imaging lens comprises, 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 sixth lens E6, a seventh lens E7, a filter E8 and an imaging surface S17.

[0133] 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 convex, 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 convex, and its image side surface S8 is convex. The fifth lens E5 has positive focal power, and its object side surface S9 is convex, and its image side surface S10 is concave. The sixth lens E6 has positive focal power, and its object side surface S11 is convex, and its image side surface S12 is convex. The seventh lens E7 has negative focal power, and its object side surface S13 is convex, and its image side surface S14 is concave. The filter E8 has an object side surface S15 and an image side surface S16. The light from the object passes through each surface of the surfaces S1 to S16 in sequence and is finally imaged on the imaging surface S17.

[0134] As shown in Table 10, it is a basic parameter table of the optical imaging lens of Example 4, wherein the units of the curvature radius, thickness, and focal length are all millimeters (mm).

[0135]

[0136]

[0137] Table 10

[0138] As shown in Table 11, in Example 4, the total effective focal length of the optical imaging lens f=5.60 mm, the distance TTL from the object side surface S1 of the first lens E1 to the imaging surface S17 on the optical axis=6.71 mm, half of the diagonal length of the effective pixel area on the imaging surface S17 ImgH=4.80 mm, and the maximum field of view FOV of the optical imaging system=79.78°. The parameters of each relational expression are as explained in the first embodiment, and the values ​​of each relational expression are listed in the following table.

[0139]

[0140] Table 11

[0141] In Example 4, the object side surface and the image side surface of any one of the first lens E1 to the seventh lens E7 are aspherical surfaces. Table 12 shows the high-order coefficients A4, A6, A8, A9, A10, A11, A12, A13, A14, A15, A16, A17, A18, A19, A20, A21, A22, A23, A24, A25, A26, A27, A28, A29, A30, A31, A32, A33, A34, A35, A36, A37, A38, A39, A40, A41, A42, A43, A44, A45, A46, A47, A48, A49, A50, A51, A52, A53, A54, A55, A56, A57, A58, A 10 , A 12 , A 14 , A 16 , A 18 , A 20 , A 22 , A 24 , A 26 , A 28 and A 30 .

[0142]

[0143]

[0144] Table 12

[0145] Figure 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. Figure 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. Figures 8a to 8d It can be seen from the figure that the optical imaging lens provided in Example 4 can achieve good imaging quality. Specific embodiment 5

[0147] Fig. 9 2 is a schematic diagram of the lens group structure of an optical imaging lens embodiment 5 of the present invention. 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 sixth lens E6, a seventh lens E7, a filter E8 and an imaging surface S17.

[0148] 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 convex, 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 convex. The fourth lens E4 has positive focal power, and its object side surface S7 is convex, and its image side surface S8 is convex. The fifth lens E5 has positive focal power, and its object side surface S9 is convex, and its image side surface S10 is concave. The sixth lens E6 has positive focal power, and its object side surface S11 is convex, and its image side surface S12 is concave. The seventh lens E7 has negative focal power, and its object side surface S13 is convex, and its image side surface S14 is concave. The filter E8 has an object side surface S15 and an image side surface S16. The light from the object passes through each surface of the surfaces S1 to S16 in sequence and is finally imaged on the imaging surface S17.

[0149] As shown in Table 13, it is a basic parameter table of the optical imaging lens of Example 5, wherein the units of the radius of curvature, thickness, and focal length are all millimeters (mm).

[0150] Face number Surface type Radius of curvature Thickness / distance focal length Refractive Index Dispersion coefficient Cone coefficient OBJ Spherical endless 2400.0000 STO Spherical endless -0.7160 S1 Aspheric 2.3135 0.9382 4.99 1.54 56.1 0.0000 S2 Aspheric 13.2193 0.0932 0.0000 S3 Aspheric 6.4892 0.4227 -10.79 1.67 19.2 0.0000 S4 Aspheric 3.3472 0.5576 0.0000 S5 Aspheric -31.1731 0.2608 -72.10 1.66 20.4 0.0000 S6 Aspheric -88.8800 0.0579 0.0000 S7 Aspheric 34.7779 0.5976 26.44 1.54 56.1 0.0000 S8 Aspheric -24.4986 0.5074 0.0000 S9 Aspheric 7.5205 0.3682 114.06 1.57 37.3 0.0000 S10 Aspheric 8.3523 0.2627 0.0000 S11 Aspheric 4.0141 0.4000 7.41 1.54 56.1 0.0000 S12 Aspheric 533.4741 0.7012 0.0000 S13 Aspheric 7.2441 0.4200 -4.50 1.54 55.7 0.0000 S14 Aspheric 1.7756 0.2173 -0.8934 S15 Spherical endless 0.2100 1.52 64.2 S16 Spherical endless 0.6952 S17 Spherical endless

[0151] Table 13

[0152] As shown in Table 14, in Example 5, the total effective focal length of the optical imaging lens f=5.60 mm, the distance TTL from the object side surface S1 of the first lens E1 to the imaging surface S17 on the optical axis=6.71 mm, half of the diagonal length of the effective pixel area on the imaging surface S17 ImgH=4.80 mm, and the maximum field of view FOV of the optical imaging system=79.77°. The parameters of each relational expression are as explained in the first embodiment, and the values ​​of each relational expression are listed in the following table.

[0153]

[0154]

[0155] Table 14

[0156] In Example 5, the object side surface and the image side surface of any one of the first lens E1 to the seventh lens E7 are aspherical surfaces. Table 15 shows the high-order coefficients A4, A6, A8, A9, A10, A11, A12, A13, A14, A15, A16, A17, A18, A19, A20, A21, A22, A23, A24, A25, A26, A27, A28, A29, A30, A31, A32, A33, A34, A35, A36, A37, A38, A39, A40, A41, A42, A43, A44, A45, A46, A47, A48, A49, A50, A51, A52, A53, A54, A55, A56, A57, A58, A 10 , A 12 , A 14 , A 16 , A 18 , A 20 , A 22 , A 24 , A 26 , A 28 and A 30 .

[0157] Face number A4 A6 A8 A10 A12 A14 A16 S1 -2.2494E-04 8.9805E-04 -4.1670E-04 -7.9732E-04 1.4575E-03 -1.0899E-03 4.2036E-04 S2 -3.5842E-02 3.5873E-02 -2.1983E-02 7.2045E-03 1.7261E-04 -1.3860E-03 6.1909E-04 S3 -4.8581E-02 4.3444E-02 -2.1495E-02 4.2527E-03 2.4243E-03 -2.1302E-03 7.2620E-04 S4 -1.7988E-02 1.3611E-02 1.7964E-02 -5.4174E-02 7.4101E-02 -6.0939E-02 3.0492E-02 S5 -2.9409E-02 -3.4571E-02 3.1685E-02 2.1472E-01 -1.0436E+00 2.2914E+00 -3.0575E+00 S6 -1.1145E-02 -1.6944E-01 4.7771E-01 -8.1681E-01 8.8673E-01 -5.6928E-01 1.2986E-01 S7 -4.0238E-03 -1.2620E-01 2.4285E-01 -9.3037E-02 -5.3517E-01 1.3719E+00 -1.7888E+00 S8 -1.1900E-02 -6.2227E-02 1.5494E-01 -2.8601E-01 3.8283E-01 -3.6856E-01 2.5354E-01 S9 3.3286E-02 -1.6504E-01 2.5863E-01 -2.5153E-01 1.5400E-01 -5.4797E-02 5.3736E-03 S10 9.4504E-02 -3.5518E-01 5.0014E-01 -4.5281E-01 2.8648E-01 -1.3116E-01 4.4144E-02 S11 1.6538E-01 -2.8521E-01 2.6633E-01 -1.8297E-01 9.5090E-02 -3.7302E-02 1.0882E-02 S12 1.4399E-01 -1.2571E-01 5.4446E-02 -1.2208E-02 1.3655E-03 -6.4679E-04 4.9263E-04 S13 -1.6011E-01 4.7080E-02 -9.6181E-03 2.3693E-03 -1.2483E-04 -2.4984E-04 1.1084E-04 S14 -2.0296E-01 1.0345E-01 -4.9112E-02 1.9305E-02 -5.8019E-03 1.2915E-03 -2.1204E-04 Face number A18 A20 A22 A24 A26 A28 A30 S1 -8.3521E-05 6.3766E-06 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 S2 -1.2287E-04 9.5088E-06 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 S3 -1.1751E-04 7.6713E-06 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 S4 -8.5242E-03 1.0279E-03 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 S5 2.6527E+00 -1.5079E+00 5.4274E-01 -1.1233E-01 1.0188E-02 0.0000E+00 0.0000E+00 S6 1.0395E-01 -1.0726E-01 4.3919E-02 -9.0281E-03 7.6437E-04 0.0000E+00 0.0000E+00 S7 1.5062E+00 -8.6944E-01 3.4842E-01 -9.5474E-02 1.7077E-02 -1.7968E-03 8.4349E-05 S8 -1.2294E-01 4.0662E-02 -8.4739E-03 8.5968E-04 3.0186E-05 -1.6921E-05 1.2476E-06 S9 5.1535E-03 -3.0962E-03 9.0076E-04 -1.5982E-04 1.7545E-05 -1.0999E-06 3.0213E-08 S10 -1.0974E-02 2.0075E-03 -2.6665E-04 2.5007E-05 -1.5698E-06 5.9179E-08 -1.0130E-09 S11 -2.3308E-03 3.6259E-04 -4.0360E-05 3.1279E-06 -1.6021E-07 4.8739E-09 -6.6679E-11 S12 -1.8650E-04 4.1283E-05 -5.8228E-06 5.3422E-07 -3.1025E-08 1.0394E-09 -1.5340E-11 S13 -2.4355E-05 3.3271E-06 -3.0047E-07 1.8064E-08 -6.9847E-10 1.5767E-11 -1.5828E-13 S14 2.5719E-05 -2.2978E-06 1.4924E-07 -6.8458E-09 2.0996E-10 -3.8579E-12 3.2077E-14

[0158] Table 15

[0159] 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.10d The 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. Figures 10a to 10d It can be seen from the figure that the optical imaging lens provided in Example 5 can achieve good imaging quality. Specific embodiment 6

[0161] Fig.11 Schematic diagram of the lens group structure of embodiment 6 of the optical imaging lens of the present invention. The optical imaging lens comprises, 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 sixth lens E6, a seventh lens E7, a filter E8 and an imaging surface S17.

[0162] 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 convex, and its image side surface S4 is concave. The third lens E3 has positive focal power, and its object side surface S5 is concave, and its image side surface S6 is convex. 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 positive focal power, and its object side surface S9 is convex, and its image side surface S10 is concave. The sixth lens E6 has positive focal power, and its object side surface S11 is convex, and its image side surface S12 is concave. The seventh lens E7 has negative focal power, and its object side surface S13 is convex, and its image side surface S14 is concave. The filter E8 has an object side surface S15 and an image side surface S16. The light from the object passes through each surface of the surfaces S1 to S16 in sequence and is finally imaged on the imaging surface S17.

[0163] As shown in Table 16, it is a basic parameter table of the optical imaging lens of Example 6, wherein the units of the radius of curvature, thickness, and focal length are all millimeters (mm).

[0164] Face number Surface type Radius of curvature Thickness / distance focal length Refractive Index Dispersion coefficient Cone coefficient OBJ Spherical endless 2400.0000 STO Spherical endless -0.7060 S1 Aspheric 2.2987 0.9430 4.94 1.54 56.1 0.0000 S2 Aspheric 13.4078 0.1049 0.0000 S3 Aspheric 7.1289 0.4212 -10.49 1.67 19.2 0.0000 S4 Aspheric 3.4741 0.5360 0.0000 S5 Aspheric -172.2156 0.2942 99.79 1.66 20.4 0.0000 S6 Aspheric -48.0453 0.0429 0.0000 S7 Aspheric -24.8006 0.5954 62.15 1.54 56.1 0.0000 S8 Aspheric -14.4447 0.4684 0.0000 S9 Aspheric 6.9417 0.3562 176.43 1.57 37.3 0.0000 S10 Aspheric 7.3171 0.2883 0.0000 S11 Aspheric 3.8705 0.4000 7.65 1.54 56.1 0.0000 S12 Aspheric 51.7239 0.7121 0.0000 S13 Aspheric 6.3685 0.4200 -4.66 1.54 55.7 0.0000 S14 Aspheric 1.7538 0.2197 -0.8716 S15 Spherical endless 0.2100 1.52 64.2 S16 Spherical endless 0.6976 S17 Spherical endless

[0165] Table 16

[0166] As shown in Table 17, in Example 6, the total effective focal length of the optical imaging lens f=5.60 mm, the distance TTL from the object side surface S1 of the first lens E1 to the imaging surface S17 on the optical axis=6.71 mm, half of the diagonal length of the effective pixel area on the imaging surface S17 ImgH=4.80 mm, and the maximum field of view FOV of the optical imaging system=79.79°. The parameters of each relational expression are as explained in the first embodiment, and the values ​​of each relational expression are listed in the following table.

[0167]

[0168] Table 17

[0169] In Example 6, the object side surface and the image side surface of any one of the first lens E1 to the seventh lens E7 are aspherical surfaces. Table 18 shows the high-order coefficients A4, A6, A8, A9, A10, A11, A12, A13, A14, A15, A16, A17, A18, A19, A20, A21, A22, A23, A24, A25, A26, A27, A28, A29, A30, A31, A32, A33, A34, A35, A36, A37, A38, A39, A40, A41, A42, A43, A44, A45, A46, A47, A48, A49, A50, A51, A52, A53, A54, A55, A56, A57, A58, A 10 , A 12 , A 14 , A16 , A 18 , A 20 , A 22 , A 24 , A 26 , A 28 and A 30 .

[0170]

[0171]

[0172] Table 18

[0173] Fig.12a The axial chromatic aberration curve of the optical imaging lens of Example 6 is shown, which indicates the deviation of light of different wavelengths from the focal point behind the lens. Figure 12b The astigmatism curve of the optical imaging lens of Example 6 is shown, which represents the meridional image curvature and the sagittal image curvature. Fig.12c The distortion curve of the optical imaging lens of Example 6 is shown, which represents the distortion magnitude values ​​corresponding to different image heights. Fig.12d The magnification chromatic aberration curve of the optical imaging lens of Example 6 is shown, which represents the deviation of different image heights on the imaging surface after the light passes through the lens. Figures 12a to 12d It can be seen from the figure that the optical imaging lens provided in Example 6 can achieve good imaging quality. Specific embodiment 7

[0175] Fig.13 2 is a schematic diagram of the lens group structure of Embodiment 7 of the optical imaging lens of the present invention. The optical imaging lens comprises, 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 sixth lens E6, a seventh lens E7, a filter E8 and an imaging surface S17.

[0176] 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 convex, and its image side surface S4 is concave. The third lens E3 has positive focal power, and its object side surface S5 is convex, and its image side surface S6 is convex. The fourth lens E4 has positive focal power, and its object side surface S7 is convex, and its image side surface S8 is convex. The fifth lens E5 has positive focal power, and its object side surface S9 is convex, and its image side surface S10 is concave. The sixth lens E6 has positive focal power, and its object side surface S11 is convex, and its image side surface S12 is concave. The seventh lens E7 has negative focal power, and its object side surface S13 is convex, and its image side surface S14 is concave. The filter E8 has an object side surface S15 and an image side surface S16. The light from the object passes through each surface of the surfaces S1 to S16 in sequence and is finally imaged on the imaging surface S17.

[0177] As shown in Table 19, it is a basic parameter table of the optical imaging lens of Example 7, wherein the units of the radius of curvature, thickness, and focal length are all millimeters (mm).

[0178]

[0179]

[0180] Table 19

[0181] As shown in Table 20, in Example 7, the total effective focal length of the optical imaging lens f=5.60 mm, the distance TTL from the object side surface S1 of the first lens E1 to the imaging surface S17 on the optical axis=6.71 mm, half of the diagonal length of the effective pixel area on the imaging surface S17 ImgH=4.80 mm, and the maximum field of view FOV of the optical imaging system=°. The parameters of each relational expression are as explained in the first embodiment, and the values ​​of each relational expression are listed in the following table.

[0182]

[0183] Table 20

[0184] In Example 7, the object side surface and the image side surface of any one of the first lens E1 to the seventh lens E7 are aspherical surfaces. Table 21 shows the high-order coefficients A4, A6, A8, A9, A10, A11, A12, A13, A14, A15, A16, A17, A18, A19, A20, A21, A22, A23, A24, A25, A26, A27, A28, A29, A30, A31, A32, A33, A34, A35, A36, A37, A38, A39, A40, A41, A42, A43, A44, A45, A46, A47, A48, A49, A50, A51, A52, A53, A54, A55, A56, A57, A58, A 10 , A 12 , A 14 , A 16 , A 18 , A 20 , A 22 , A 24 , A 26 , A 28 and A 30 .

[0185]

[0186]

[0187] Table 21

[0188] Fig.14a The axial chromatic aberration curve of the optical imaging lens of Example 7 is shown, which indicates the deviation of light of different wavelengths from the focal point behind the lens. Fig.14b The astigmatism curve of the optical imaging lens of Example 7 is shown, which represents the meridional image curvature and the sagittal image curvature. Fig.14c The distortion curve of the optical imaging lens of Example 7 is shown, which represents the distortion magnitude values ​​corresponding to different image heights. Fig.14d The magnification chromatic aberration curve of the optical imaging lens of Example 7 is shown, which represents the deviation of different image heights on the imaging surface after the light passes through the lens. Figures 14a to 14d It can be seen from the figure that the optical imaging lens provided in Example 7 can achieve good imaging quality.

[0189] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, improvements, equivalent substitutions, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. An optical imaging lens, characterized in that: The optical imaging lens has seven lenses, and the seven lenses include, in order from the object side to the image side along the optical axis: The first lens has positive refractive power, and 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 convex and its image side surface is concave; a third lens having positive or negative optical power; a fourth lens element having positive refractive power and a convex image-side surface; a fifth lens having positive refractive power and a convex object side surface; a sixth lens having positive refractive power and a convex object-side surface; The seventh lens element has a negative optical power and its image side surface is concave; The effective focal length f1 of the first lens and half of the diagonal length of the effective pixel area on the imaging surface ImgH satisfy the following: 1≤f1 / ImgH≤1.05; The effective focal length f of the optical imaging lens, the effective focal length f6 of the sixth lens, and the effective focal length f7 of the seventh lens satisfy the following conditions: 0.98≤f / (f6+f7)≤1.92; The on-axis distance SAG71 between the intersection of the object side of the seventh lens and the optical axis to the effective radius vertex of the object side of the seventh lens and the on-axis distance SAG51 between the intersection of the object side of the fifth lens and the optical axis to the effective radius vertex of the object side of the fifth lens satisfy: 1.73≤SAG71 / SAG51≤2.

2. The optical imaging lens according to claim 1, wherein: The axial distance TTL from the object side of the first lens to the imaging plane and half the diagonal length of the effective pixel area on the imaging plane ImgH satisfy the following: TTL / ImgH=1.

4.

3. The optical imaging lens according to claim 1, wherein: The effective focal length f of the optical imaging lens and the entrance pupil diameter EPD of the optical imaging lens satisfy: f / EPD=1.

65.

4. The optical imaging lens according to claim 1, wherein: The effective focal length f2 of the second lens, the curvature radius R4 of the image side surface of the second lens, and the curvature radius R3 of the object side surface of the second lens satisfy: 1.91≤f2 / (R4-R3)≤7.

62.

5. The optical imaging lens according to claim 1, wherein: The effective focal length f4 of the fourth lens and the effective focal length f5 of the fifth lens satisfy: -0.62≤(f4-f5) / (f4+f5)≤0.

64.

6. The optical imaging lens according to claim 1, wherein: A center thickness CT1 of the first lens on the optical axis, 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 satisfy: 0.86≤CT1 / (CT3+CT4)≤1.

09.

7. The optical imaging lens according to claim 1, wherein: A curvature radius R2 of the image-side surface of the first lens and a curvature radius R1 of the object-side surface of the first lens satisfy: 5.71≤R2 / R1≤7.

5.

8. The optical imaging lens according to claim 1, wherein: The maximum field of view FOV of the optical imaging lens satisfies: 79.63°≤FOV≤80.82°.

9. The optical imaging lens according to claim 1, wherein: The combined focal length f12 of the first and second lenses and the combined focal length f67 of the sixth and seventh lenses satisfy: -1.33≤f12 / f67≤-0.

34.

10. The optical imaging lens according to claim 1, wherein: The on-axis distance SAG62 between the intersection of the image side surface of the sixth lens and the optical axis to the effective radius vertex of the image side surface of the sixth lens and the on-axis distance SAG61 between the intersection of the object side surface of the sixth lens and the optical axis to the effective radius vertex of the object side surface of the sixth lens satisfies: 1.03≤SAG62 / SAG61≤1.

75.

11. The optical imaging lens according to claim 1, wherein: A center thickness CT4 of the fourth lens on the optical axis and an edge thickness ET4 of the fourth lens satisfy: 1.96≤CT4 / ET4≤2.

31.

12. The optical imaging lens according to claim 1, wherein: An edge thickness ET6 of the sixth lens, an edge thickness ET7 of the seventh lens, and an edge thickness ET5 of the fifth lens satisfy: 1.14≤(ET6+ET7) / ET5≤1.59.

Images