An optical imaging lens

Abstract

The present invention discloses an optical imaging lens. The optical imaging lens sequentially includes, from the object side to the image side along the optical axis: a first lens with a negative optical power; a second lens with a positive optical power, whose image side is concave; a third lens with an optical power, whose object side is convex; a fourth lens with a negative optical power, whose object side is concave; a fifth lens with an optical power; a sixth lens with a positive optical power, whose image side is convex; a seventh lens with a negative optical power; wherein, half of the diagonal length of the effective pixel area on the imaging surface of the optical imaging lens, ImgH, and the axial distance TTL from the object side of the first lens of the optical imaging lens to the imaging surface satisfy: 4.0 mm ≤ ImgH × ImgH / TTL < 7.0 mm. The optical imaging lens provided by the present invention effectively balances the low-order aberrations of the system and reduces the sensitivity to tolerances by reasonably controlling the optical power distribution of each component of the system, and provides a seven-piece optical imaging lens with a large wide angle, a large aperture and a thin profile.

Description

Technical Field

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

[0002] A lens is the most important optical imaging device on a camera. The lens made of optical glass collects and converges the light entering the lens, and forms an image on the imaging medium. A more complex lens is a lens composed of two or more pieces of optical glass, called a lens unit. The lens unit forms an integral whole, which is a camera lens. The quality of the camera lens directly affects the imaging quality.

[0003] The focal length of the lens is the main index of the performance of the camera lens. According to the length of the lens focal length, the lens can be divided into different types, such as an ultra-wide-angle lens, a wide-angle lens, a standard zoom lens, a medium-long focal length zoom lens, and an ultra-long focal length zoom lens, and also includes many fixed-focus lenses with different focal lengths, etc.

[0004] With the continuous improvement of the performance of the photosensitive elements CCD and CMOS, higher design requirements are put forward for mobile phone lenses. While requiring them to have characteristics such as a large wide angle, a large aperture, and ultra-thinness, and to meet high imaging quality, the seven-piece optical imaging lens structure will gradually become the mainstream. Therefore, a seven-piece optical imaging lens with a large wide angle, a large aperture, and ultra-thinness is needed to better meet the application requirements of the main camera of high-end smart phones. Summary of the Invention

[0005] The present invention aims to provide a seven-piece optical imaging lens with a large wide angle, a large aperture, and ultra-thinness, so as to better meet the application requirements of the main camera of high-end smart phones.

[0006] The present invention provides an optical imaging lens, which sequentially includes, from the object side to the image side along the optical axis: a first lens with a negative focal power; a second lens with a positive focal power, the image side of which is concave; a third lens with a focal power, the object side of which is convex; a fourth lens with a negative focal power, the object side of which is concave; a fifth lens with a focal power; a sixth lens with a positive focal power, the image side of which is convex; and a seventh lens with a negative focal power.

[0007] Wherein, half of the diagonal length of the effective pixel region on the imaging surface ImgH and the on-axis distance TTL from the object side surface of the first lens to the imaging surface satisfy: 4.0 mm ≤ ImgH × ImgH / TTL < 7.0 mm.

[0008] According to an embodiment of the present invention, the on-axis distance TTL from the object side surface of the first lens to the imaging surface and half of the diagonal length of the effective pixel region on the imaging surface ImgH satisfy: TTL / ImgH < 1.4.

[0009] According to an embodiment of the present invention, the effective focal length f of the optical imaging lens and the maximum field of view FOV of the optical imaging lens satisfy: 5.2 mm < f × tan(1 / 2 FOV) < 7.0 mm.

[0010] According to an embodiment of the present invention, the effective focal length f3 of the third lens, the effective focal length f6 of the sixth lens, and the effective focal length f2 of the second lens satisfy: 0.8 < (f3 + f6) / f2 < 1.8.

[0011] According to an embodiment of the present invention, the effective focal length f4 of the fourth lens, the effective focal length f7 of the seventh lens, and the effective focal length f5 of the fifth lens satisfy: 0.6 < (f4 + f7) / f5 < 1.4.

[0012] According to an embodiment of the present invention, the radius of curvature R4 of the image side surface of the second lens and the radius of curvature R3 of the object side surface of the second lens satisfy: 1.5 < R4 / R3 < 2.3.

[0013] According to an embodiment of the present invention, the radius of curvature R12 of the image side surface of the sixth lens and the radius of curvature R11 of the object side surface of the sixth lens satisfy: 1.0 < (R12 - R11) / (R12 + R11) < 1.5.

[0014] According to an embodiment of the present invention, the radius of curvature R14 of the image side surface of the seventh lens and the radius of curvature R13 of the object side surface of the seventh lens satisfy: 1.7 < (R13 + R14) / (R13 - R14) < 2.2.

[0015] According to an embodiment of the present invention, the air gap T23 between the second lens and the third lens on the optical axis, the air gap T34 between the third lens and the fourth lens on the optical axis, and the central thickness CT3 of the third lens on the optical axis satisfy: 1.5 < (T23 + T34) / CT3 < 2.5.

[0016] According to an embodiment of the present invention, the combined focal length f12 of the first and second lenses, the central thickness CT1 of the first lens on the optical axis, and the central thickness CT2 of the second lens on the optical axis satisfy: 11 < f12 / (CT1 + CT2) < 15.

[0017] According to an embodiment of the present invention, the radius of curvature R7 of the object side surface of the fourth lens, the radius of curvature R9 of the object side surface of the fifth lens, and the combined focal length f45 of the fourth and fifth lenses satisfy: 1.8 < (R7 + R9) / f45 < 2.8.

[0018] According to an embodiment of the present invention, the central thickness CT5 of the fifth lens on the optical axis and the edge thickness ET5 of the fifth lens satisfy: 1.6 < CT5 / ET5 < 2.6.

[0019] According to an embodiment of the present invention, the edge thickness ET6 of the sixth lens and the central thickness CT6 of the sixth lens on the optical axis satisfy: 0.9 < ET6 / CT6 < 1.4.

[0020] According to an embodiment of the present invention, the axial distance SAG41 between the intersection of the object side surface of the fourth lens and the optical axis and the vertex of the effective radius of the object side surface of the fourth lens and the axial distance SAG42 between the intersection of the image side surface of the fourth lens and the optical axis and the vertex of the effective radius of the image side surface of the fourth lens satisfy: 1.2 < SAG41 / SAG42 < 1.7.

[0021] One aspect of the present invention provides an optical imaging lens, which sequentially includes, along the optical axis from the object side to the image side: a first lens with a negative optical power; a second lens with a positive optical power, whose image side surface is concave; a third lens with an optical power, whose object side surface is convex; a fourth lens with a negative optical power, whose object side surface is concave; a fifth lens with an optical power; a sixth lens with a positive optical power, whose image side surface is convex; and a seventh lens with a 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 f of the optical imaging lens and the maximum field of view FOV of the optical imaging lens satisfy: 5.2 mm < f × tan(1 / 2 FOV) < 7.0 mm.

[0023] Advantages of the present invention:

[0024] The optical imaging lens provided by the present invention includes multiple lenses, such as the first lens to the seventh lens. By reasonably controlling the distribution of the optical power of each component of the system, the low-order aberrations of the system can be effectively balanced, and the sensitivity to tolerances can be reduced. By restricting the relationship between the square of half of the diagonal length of the effective pixel area on the imaging surface and the axial distance from the object side surface of the first lens to the imaging surface, the total size of the optical imaging lens can be effectively reduced, providing a seven-lens optical imaging lens with a large wide angle, a large aperture, and a thin profile, which can better meet the application requirements of the main camera of high-end smart phones. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following will briefly introduce the drawings required for the description of the embodiments. Obviously, the following drawings are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0026] Figure 1 It is a schematic diagram of the lens group structure of Embodiment 1 of the optical imaging lens of the present invention;

[0027] Figures 2a to 2d are respectively the axial chromatic aberration curve, astigmatism curve, distortion curve and longitudinal chromatic aberration curve of Embodiment 1 of the optical imaging lens of the present invention;

[0028] Figure 3 is a schematic structural diagram of the lens group of Embodiment 2 of the optical imaging lens of the present invention;

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

[0030] Figure 5 is a schematic structural diagram of the lens group of Embodiment 3 of the optical imaging lens of the present invention;

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

[0032] Figure 7 is a schematic structural diagram of the lens group of Embodiment 4 of the optical imaging lens of the present invention;

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

[0034] Figure 9 is a schematic structural diagram of the lens group of Embodiment 5 of the optical imaging lens of the present invention;

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

[0036] Figure 11 is a schematic structural diagram of the lens group of Embodiment 6 of the optical imaging lens of the present invention;

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

[0038] Figure 13 is a schematic structural diagram of the lens group of Embodiment 7 of the optical imaging lens of the present invention;

[0039] Figures 14a to 14d are respectively the axial chromatic aberration curve, astigmatism curve, distortion curve and longitudinal chromatic aberration curve of Embodiment 7 of the optical imaging lens of the present invention;

[0040] Figure 15Schematic diagram of the lens group of Embodiment 8 of the optical imaging lens of the present invention;

[0041] Figures 16a to 16d They are respectively the axial chromatic aberration curve, astigmatism curve, distortion curve and lateral chromatic aberration curve of Embodiment 8 of the optical imaging lens of the present invention;

[0042] Figure 17 Schematic diagram of the lens group of Embodiment 9 of the optical imaging lens of the present invention;

[0043] Figures 18a to 18d They are respectively the axial chromatic aberration curve, astigmatism curve, distortion curve and lateral chromatic aberration curve of Embodiment 9 of the optical imaging lens of the present invention. Detailed implementation manners

[0044] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without making creative efforts shall fall within the protection scope of the present invention.

[0045] It should be noted that in this specification, the expressions such as first, second, and third are only used to distinguish one feature from another feature, and do not represent any limitation on the feature. Therefore, without departing from the teachings of the present invention, the first lens discussed below may also be referred to as the second lens or the third lens.

[0046] It should also be understood that the terms "comprise", "comprising", "have", "include" and / or "including", 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 an expression such as "at least one of..." appears after the list of listed features, it modifies the entire list of listed features, rather than modifying a single element in the list. In addition, when describing the embodiments of the present application, the use of "may" means "one or more embodiments of the present application". And the term "exemplary" is intended to refer to an example or illustration.

[0047] In the drawings, for the sake of convenience of illustration, the thickness, size and shape of the lens have been slightly exaggerated. 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 spherical or aspherical surfaces shown in the drawings. The drawings are only for illustration and are not drawn strictly to scale.

[0048] 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 to be photographed is called the object side surface of the lens, and the surface of each lens closest to the imaging surface is called the image side surface of the lens.

[0049] 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 should also be understood that terms (such as those defined in a common dictionary) should be interpreted as having a meaning consistent with their meaning in the context of the relevant art and will not be interpreted in an idealized or overly formal manner unless expressly so defined herein.

[0050] It should be noted that, without conflict, the embodiments in 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 conjunction with the embodiments.

[0051] Exemplary Embodiment

[0052] The optical imaging lens according to the exemplary embodiment of the present invention includes seven lenses, which are sequentially arranged 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. Among them, each lens is independent of each other, and there is an air gap between each lens on the optical axis.

[0053] In this exemplary embodiment, the first lens has a negative optical power; the second lens has a positive optical power, and its image side surface is concave; the third lens may have a positive optical power or a negative optical power, and its object side surface is convex; the fourth lens has a negative optical power, and its object side surface is concave; the fifth lens may have a positive optical power or a negative optical power; the sixth lens has a positive optical power, and its image side surface is convex; the seventh lens has a negative optical power. Reasonably matching the optical powers and surface types of the lenses in the optical imaging system is beneficial to both the rationality of the structure of the optical imaging lens and the realization of the ultra-clear photographing function of the lens, and reduces the sensitivity of the system to tolerances.

[0054] In this exemplary embodiment, the conditional expression satisfied by half of the diagonal length ImgH of the effective pixel region on the imaging surface and the on-axis distance TTL from the object side surface of the first lens to the imaging surface is: 4.0 mm ≤ ImgH × ImgH / TTL < 7.0 mm. By reasonably controlling the distribution of the optical powers of the various components of the system, the low-order aberrations of the system can be effectively balanced, and the sensitivity to tolerances can be reduced. By restricting the square of half of the diagonal length of the effective pixel region on the imaging surface and the on-axis distance from the object side surface of the first lens to the imaging surface, the total size of the camera lens group can be effectively reduced, and the ultra-thin characteristics and miniaturization of the camera lens group can be achieved. More specifically, ImgH and TTL satisfy: 4.00 mm ≤ ImgH × ImgH / TTL ≤ 4.11 mm.

[0055] In this exemplary embodiment, the conditional expression satisfied by the on-axis distance TTL from the object side surface of the first lens to the imaging surface and half of the diagonal length ImgH of the effective pixel region on the imaging surface is: TTL / ImgH < 1.4. By restricting the ratio of the on-axis distance from the object side surface of the first lens to the imaging surface and half of the diagonal length of the effective pixel region on the imaging surface, the ultra-thinness and high pixel performance of the optical imaging system can be achieved simultaneously. More specifically, TTL and ImgH satisfy: 1.32 ≤ TTL / ImgH ≤ 1.35.

[0056] In this exemplary embodiment, the conditional expression satisfied by the effective focal length f of the optical imaging lens and the maximum field of view FOV of the optical imaging lens is: 5.2 mm < f × tan(1 / 2 FOV) < 7.0 mm. By restricting the maximum half field of view of the imaging system and the effective focal length of the imaging system, the imaging effect of a large image surface of the system can be achieved, and thus higher optical performance and better processing technology can be obtained. More specifically, f and FOV satisfy: 5.28 mm ≤ f × tan(1 / 2 FOV) ≤ 5.33 mm.

[0057] In this exemplary embodiment, the conditional expression satisfied by the effective focal length f3 of the third lens, the effective focal length f6 of the sixth lens, and the effective focal length f2 of the second lens is: 0.8 < (f3 + f6) / f2 < 1.8. By restricting the effective focal lengths of the third lens and the sixth lens and the effective focal length of the second lens, the optical powers can be reasonably distributed, and thus good imaging quality can be obtained, and the effect of high resolution can be achieved. More specifically, f3, f6, and f2 satisfy: 0.96 ≤ (f3 + f6) / f2 ≤ 1.66.

[0058] In this exemplary embodiment, the conditional expression satisfied by the effective focal length f4 of the fourth lens, the effective focal length f7 of the seventh lens, and the effective focal length f5 of the fifth lens is: 0.6 < (f4 + f7) / f5 < 1.4. By constraining the ratio of the sum of the effective focal lengths of the fourth lens and the seventh lens to the effective focal length of the fifth lens, the optical power is reasonably distributed to obtain good imaging quality. More specifically, f4, f7, and f5 satisfy: 0.78 ≤ (f4 + f7) / f5 ≤ 1.24.

[0059] In this exemplary embodiment, the conditional expression satisfied by the curvature radius R4 of the image side of the second lens and the curvature radius R3 of the object side of the second lens is: 1.5 < R4 / R3 < 2.3. By reasonably controlling the ratio of the curvature radius of the image side of the second lens and the curvature radius of the object side of the second lens within a certain range, the deflection angle of the marginal rays of the system can be reasonably controlled, and the sensitivity of the system can be effectively reduced. More specifically, R4 and R3 satisfy: 1.61 ≤ R4 / R3 ≤ 2.13.

[0060] In this exemplary embodiment, the conditional expression satisfied by the curvature radius R12 of the image side of the sixth lens and the curvature radius R11 of the object side of the sixth lens is: 1.0 < (R12 - R11) / (R12 + R11) < 1.5. By reasonably controlling the curvature radius of the image side of the sixth lens and the curvature radius of the object side of the sixth lens within a certain interval, the deflection angle of the light rays in this lens can be reduced, thereby avoiding the generation of strong total reflection ghost images due to excessive deflection angles. More specifically, R12 and R11 satisfy: 1.06 ≤ (R12 - R11) / (R12 + R11) ≤ 1.14.

[0061] In this exemplary embodiment, the conditional expression satisfied by the curvature radius R14 of the image side of the seventh lens and the curvature radius R13 of the object side of the seventh lens is: 1.7 < (R13 + R14) / (R13 - R14) < 2.2. By constraining the curvature radius of the image side of the seventh lens and the curvature radius of the object side of the seventh lens, the deflection angle of the light rays in this lens can be reasonably controlled, and the generation of strong total reflection ghost images due to excessive deflection angles can be avoided. More specifically, R13 and R14 satisfy: 1.83 ≤ (R13 + R14) / (R13 - R14) ≤ 1.94.

[0062] In the present exemplary embodiment, the conditional expressions satisfied by the air gap T23 between the second lens and the third lens on the optical axis, the air gap T34 between the third lens and the fourth lens on the optical axis, and the central thickness CT3 of the third lens on the optical axis are: 1.5 < (T23 + T34) / CT3 < 2.5. By reasonably controlling the air gaps between the third lens and the second lens and the fourth lens on the optical axis and the central thickness of the third lens on the optical axis, the field curvature contribution of each field of view can be controlled within a reasonable range. More specifically, T23, T34, and CT3 satisfy: 1.74 ≤ (T23 + T34) / CT3 ≤ 2.28.

[0063] In the present exemplary embodiment, the conditional expressions satisfied by the combined focal length f12 of the first and second lenses, the central thickness CT1 of the first lens on the optical axis, and the central thickness CT2 of the second lens on the optical axis are: 11 < f12 / (CT1 + CT2) < 15. By controlling the ratio of the combined focal length of the first and second lenses to the sum of their central thicknesses on the optical axis, the optical powers of the first and second lenses can be reasonably distributed, the off-axis aberrations of the system can be balanced, and the aberration correction ability can be improved. More specifically, f12, CT1, and CT2 satisfy: 11.11 ≤ f12 / (CT1 + CT2) ≤ 14.45.

[0064] In the present exemplary embodiment, the conditional expressions satisfied by the curvature radius R7 of the object side surface of the fourth lens, the curvature radius R9 of the object side surface of the fifth lens, and the combined focal length f45 of the fourth and fifth lenses are: 1.8 < (R7 + R9) / f45 < 2.8. By restricting the curvature radii of the object side surfaces of the fourth lens and the fifth lens and the combined focal length of the fourth and fifth lenses within a certain range, the optical aberrations can be balanced and good imaging quality can be ensured. More specifically, R7, R9, and f45 satisfy: 2.02 ≤ (R7 + R9) / f45 ≤ 2.64.

[0065] In the present exemplary embodiment, the conditional expression satisfied by the central thickness CT5 of the fifth lens on the optical axis and the edge thickness ET5 of the fifth lens is: 1.6 < CT5 / ET5 < 2.6. By controlling the ratio of the central thickness of the fifth lens on the optical axis to the edge thickness of the fifth lens within a certain range, it is beneficial to ensure the processing, shaping, and assembly of the fifth lens, so as to obtain a stable system structure. More specifically, CT5 and ET5 satisfy: 1.81 ≤ CT5 / ET5 ≤ 2.31.

[0066] In this exemplary embodiment, the conditional expression satisfied by the edge thickness ET6 of the sixth lens and the central thickness CT6 of the sixth lens on the optical axis is: 0.9 < ET6 / CT6 < 1.4. By reasonably controlling the edge thickness of the sixth lens and the central thickness of the sixth lens on the optical axis, the processing, shaping, and assembly of the sixth lens can be effectively ensured, and a stable optical system structure can be obtained. More specifically, ET6 and CT6 satisfy: 0.98 ≤ ET6 / CT6 ≤ 1.14.

[0067] In this exemplary embodiment, the conditional expression satisfied by the axial distance SAG41 between the intersection of the object side surface of the fourth lens and the optical axis and the vertex of the effective radius of the object side surface of the fourth lens and the axial distance SAG42 between the intersection of the image side surface of the fourth lens and the optical axis and the vertex of the effective radius of the image side surface of the fourth lens is: 1.2 < SAG41 / SAG42 < 1.7. By controlling SAG41 / SAG42 within a reasonable range, it is beneficial to ensure the processing and shaping of the lens, reduce sensitivity, and thus improve the imaging effect of the system. More specifically, SAG41 and SAG42 satisfy: 1.38 ≤ SAG41 / SAG42 ≤ 1.50.

[0068] In this exemplary embodiment, the above optical imaging lens may further include a diaphragm. The diaphragm can be set at an appropriate position as needed. For example, the diaphragm can be set 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.

[0069] The optical imaging lens according to the above embodiment of the present invention may employ multiple lenses, such as the seven lenses described above. 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.

[0070] In an exemplary embodiment, at least one of the mirror surfaces of each lens is an aspherical mirror surface, that is, at least one of the object-side surface of the first lens to the image-side surface of the seventh lens is an aspherical mirror surface. The characteristics of an aspherical lens are that the curvature changes continuously from the center of the lens to the periphery of the lens. 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 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 mirror 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 mirror surfaces.

[0071] However, those skilled in the art should understand that without departing from the technical solutions claimed in this 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 embodiment, the optical imaging lens is not limited to including seven lenses. If necessary, the optical imaging lens may also include other numbers of lenses.

[0072] The specific embodiments of the optical imaging lens applicable to the above embodiments will be further described below with reference to the accompanying drawings. Specific Embodiment 1

[0074] Figure 1 It is a schematic diagram of the lens group structure of Embodiment 1 of the optical imaging lens of the present invention. The optical imaging lens sequentially includes, along the optical axis from the object side to the image side: a first lens E1, a second lens E2, a stop STO, a third lens E3, a fourth lens E4, a fifth lens E5, a sixth lens E6, a seventh lens E7, a filter E8, and an imaging surface S17.

[0075] The first lens E1 has a negative optical power, its object side S1 is concave, and its image side S2 is convex. The second lens E2 has a positive optical power, its object side S3 is convex, and its image side S4 is concave. The third lens E3 has a positive optical power, its object side S5 is convex, and its image side S6 is convex. The fourth lens E4 has a negative optical power, its object side S7 is concave, and its image side S8 is convex. The fifth lens E5 has a negative optical power, its object side S9 is concave, and its image side S10 is convex. The sixth lens E6 has a positive optical power, its object side S11 is convex, and its image side S12 is convex. The seventh lens E7 has a negative optical power, its object side S13 is convex, and its image side S14 is concave. The filter E8 has an object side S15 and an image side S16. Light from the object sequentially passes through the surfaces of S1 to S16 and finally forms an image on the imaging surface S17.

[0076] As shown in Table 1, it is the basic parameter table of the optical imaging lens of Embodiment 1, where the units of the radius of curvature, thickness, and focal length are all millimeters (mm).

[0077] Surface number Surface type Radius of curvature Thickness Focal length Refractive index Dispersion coefficient Conic coefficient OBJ Spherical surface Infinity Infinity S1 Aspherical surface -91.7801 0.3709 -166.10 1.65 23.5 0.0000 S2 Aspherical surface -643.8059 0.0400 0.0000 S3 Aspherical surface 2.5140 0.4877 10.95 1.55 56.1 0.0000 S4 Aspherical surface 4.0438 0.1766 0.0000 STO Spherical surface Infinity 0.3736 S5 Aspherical surface 9.8433 0.6514 7.16 1.55 56.1 0.0000 S6 Aspherical surface -6.3201 0.5934 0.0000 S7 Aspherical surface -4.5028 0.3347 -8.51 1.68 19.2 0.0000 S8 Aspherical surface -21.1786 0.2997 0.0000 S9 Aspherical surface -6.1202 0.6253 -13.95 1.57 37.3 0.0000 S10 Aspherical surface -27.4825 0.0400 0.0000 S11 Aspherical surface 1.9451 0.7812 3.37 1.55 56.1 -1.0000 S12 Aspherical surface -29.4885 0.5760 0.0000 S13 Aspherical surface 5.1005 0.5000 -4.08 1.55 56.1 0.0000 S14 Aspherical surface 1.4953 0.5558 -1.0000 S15 Spherical surface Infinity 0.2125 1.52 64.2 S16 Spherical surface Infinity 0.5698 S17 Spherical surface Infinity

[0078] Table 1

[0079] As shown in Table 2, in Embodiment 1, the total effective focal length f of the optical imaging lens is 4.93 mm, the distance TTL on the optical axis from the object side S1 of the first lens E1 to the imaging surface S17 is 7.19 mm, and half of the diagonal length of the effective pixel region on the imaging surface S17 is ImgH = 5.43 mm.

[0080]

[0081] Table 2

[0082] The optical imaging lens in Embodiment 1 satisfies:

[0083] ImgH × ImgH / TTL = 4.11 mm, where ImgH is half of the diagonal length of the effective pixel region on the imaging surface, and TTL is the axial distance from the object side of the first lens to the imaging surface;

[0084] TTL / ImgH = 1.32, 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 region on the imaging surface;

[0085] f × tan(1 / 2 FOV) = 5.32 mm, where f is the effective focal length of the optical imaging lens, and FOV is the maximum field of view angle of the optical imaging lens;

[0086] (f3 + f6) / f2 = 0.96, where f3 is the effective focal length of the third lens, f6 is the effective focal length of the sixth lens, and f2 is the effective focal length of the second lens;

[0087] (f4 + f7) / f5 = 0.90, where f4 is the effective focal length of the fourth lens, f7 is the effective focal length of the seventh lens, and f5 is the effective focal length of the fifth lens;

[0088] R4 / R3 = 1.61, where 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;

[0089] (R12 - R11) / (R12 + R11) = 1.14, where R12 is the radius of curvature of the image side of the sixth lens and R11 is the radius of curvature of the object side of the sixth lens;

[0090] (R13 + R14) / (R13 - R14) = 1.83, where R14 is the radius of curvature of the image side of the seventh lens and R13 is the radius of curvature of the object side of the seventh lens;

[0091] (T23 + T34) / CT3 = 1.76, where T23 is the air gap on the optical axis between the second lens and the third lens, T34 is the air gap on the optical axis between the third lens and the fourth lens, and CT3 is the central thickness of the third lens on the optical axis;

[0092] f12 / (CT1 + CT2) = 13.67, where f12 is the combined focal length of the first and second lenses, CT1 is the central thickness of the first lens on the optical axis, and CT2 is the central thickness of the second lens on the optical axis;

[0093] (R7 + R9) / f45 = 2.05, where R7 is the radius of curvature of the object side of the fourth lens, R9 is the radius of curvature of the object side of the fifth lens, and f45 is the combined focal length of the fourth and fifth lenses;

[0094] CT5 / ET5 = 2.03, where CT5 is the central thickness of the fifth lens on the optical axis and ET5 is the edge thickness of the fifth lens;

[0095] ET6 / CT6 = 1.04, where ET6 is the edge thickness of the sixth lens and CT6 is the central thickness of the sixth lens on the optical axis;

[0096] SAG41 / SAG42 = 1.42, where SAG41 is the axial distance between the intersection of the object side of the fourth lens and the optical axis and the vertex of the effective radius of the object side of the fourth lens, and SAG42 is the axial distance between the intersection of the image side of the fourth lens and the optical axis and the vertex of the effective radius of the image side of the fourth lens.

[0097] In Embodiment 1, the object side and the image side of any one of the first lens E1 to the seventh lens E7 are aspherical surfaces. The surface profile x of each aspherical lens can be defined by, but not limited to, the following aspherical formula:

[0098]

[0099] where x is the sagitta, which is the distance from the vertex of the aspherical surface along the optical axis at a position 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 reciprocal of the radius of curvature R in Table 1); k is the conic constant; and Ai is the correction coefficient of the i-th order of the aspherical surface.

[0100] In Embodiment 1, the object side and the image side of any one of the first lens E1 to the seventh lens E7 are aspherical surfaces. Table 3 shows the higher-order coefficients A4, A6, A8, A 10 、A 12 、A 14 、A 16 、A 18 、A 20 、A 22 、A 24 、A 26 、A 28 and A 30 for each of the aspherical mirror surfaces S1 - S14 in Embodiment 1.

[0101] Surface number A4 A6 A8 A10 A12 A14 A16 S1 3.5212E-02 -8.1201E-03 7.5591E-03 -5.8827E-03 3.2923E-03 -1.3244E-03 3.5243E-04 S2 4.0921E-02 1.8192E-02 -3.6780E-02 5.0203E-02 -4.3121E-02 2.3077E-02 -7.3455E-03 S3 -2.8773E-02 4.2502E-02 -7.2108E-02 4.1471E-02 1.1016E-01 -2.9966E-01 3.5061E-01 S4 -4.2467E-02 6.2149E-03 -9.3413E-03 6.1695E-02 -1.8685E-01 3.0283E-01 -2.8780E-01 S5 -1.8056E-02 -1.9119E-02 3.8215E-02 -7.8275E-02 9.6720E-02 -7.1959E-02 2.7394E-02 S6 -3.1280E-02 -2.9915E-02 8.9082E-02 -2.4725E-01 4.4759E-01 -5.4017E-01 4.3749E-01 S7 -9.7101E-02 6.8979E-02 -1.3313E-01 5.7825E-02 2.5482E-01 -6.0876E-01 7.0732E-01 S8 -7.7829E-02 6.6378E-02 -4.2783E-02 -6.7731E-02 1.9485E-01 -2.3402E-01 1.7544E-01 S9 -2.5297E-02 4.5724E-02 2.3410E-02 -1.0364E-01 1.1676E-01 -7.2805E-02 2.5476E-02 S10 -3.2208E-01 3.3894E-01 -2.5445E-01 1.6931E-01 -1.1759E-01 8.3017E-02 -4.9767E-02 S11 -2.0462E-01 2.1877E-01 -2.2083E-01 1.7886E-01 -1.1352E-01 5.5223E-02 -2.0264E-02 S12 2.2741E-01 -2.6016E-01 1.8955E-01 -9.9544E-02 3.8094E-02 -1.0683E-02 2.2078E-03 S13 -4.7774E-02 -4.0773E-02 4.4535E-02 -2.2825E-02 7.1795E-03 -1.4556E-03 1.9410E-04 S14 -1.6156E-01 6.3053E-02 -2.0484E-02 5.1966E-03 -1.0241E-03 1.5827E-04 -1.9223E-05 Surface number A18 A20 A22 A24 A26 A28 A30 S1 -5.5964E-05 3.9468E-06 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 S2 1.2168E-03 -7.5269E-05 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 S3 -2.3669E-01 9.5097E-02 -2.1184E-02 2.0236E-03 0.0000E+00 0.0000E+00 0.0000E+00 S4 1.6162E-01 -4.9737E-02 6.4955E-03 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 S5 -9.8928E-05 -4.3889E-03 1.6371E-03 -1.9766E-04 0.0000E+00 0.0000E+00 0.0000E+00 S6 -2.3449E-01 7.9716E-02 -1.5566E-02 1.3313E-03 0.0000E+00 0.0000E+00 0.0000E+00 S7 -5.0774E-01 2.3450E-01 -6.8109E-02 1.1356E-02 -8.3063E-04 0.0000E+00 0.0000E+00 S8 -8.8965E-02 3.0994E-02 -7.3008E-03 1.1076E-03 -9.7153E-05 3.7125E-06 0.0000E+00 S9 -2.5088E-03 -2.1462E-03 1.2270E-03 -3.2771E-04 5.0566E-05 -4.3324E-06 1.6018E-07 S10 2.2519E-02 -7.3572E-03 1.6973E-03 -2.6886E-04 2.7780E-05 -1.6841E-06 4.5402E-08 S11 5.5459E-03 -1.1193E-03 1.6367E-04 -1.6809E-05 1.1467E-06 -4.6543E-08 8.4891E-10 S12 -3.3677E-04 3.7714E-05 -3.0561E-06 1.7416E-07 -6.6159E-09 1.5041E-10 -1.5484E-12 S13 -1.6900E-05 9.0117E-07 -2.1849E-08 -4.5423E-10 5.0644E-11 -1.4625E-12 1.5525E-14 S14 1.8161E-06 -1.3086E-07 6.9976E-09 -2.6728E-10 6.8678E-12 -1.0613E-13 7.4426E-16

[0102] Table 3

[0103] Figure 2a shows the axial chromatic aberration curve of the optical imaging lens of Embodiment 1, which represents the deviation of the convergence points of light rays with different wavelengths after passing through the lens. Figure 2b shows the astigmatism curve of the optical imaging lens of Embodiment 1, which represents the meridional image plane curvature and the sagittal image plane curvature. Figure 2c shows the distortion curve of the optical imaging lens of Embodiment 1, which represents the distortion magnitude values corresponding to different image heights. Figure 2d shows the lateral chromatic aberration curve of the optical imaging lens of Embodiment 1, which represents the deviation of different image heights on the imaging plane after light rays pass through the lens. As can be seen from Figures 2a to 2d shown, the optical imaging lens given in Embodiment 1 can achieve good imaging quality. Specific Embodiment 2

[0105] Figure 3This is a schematic diagram of the lens group structure of Embodiment 2 of the optical imaging lens of the present invention. The optical imaging lens sequentially includes, along the optical axis from the object side to the image side: a first lens E1, a second lens E2, a stop STO, a third lens E3, a fourth lens E4, a fifth lens E5, a sixth lens E6, a seventh lens E7, a filter E8, and an imaging surface S17.

[0106] The first lens E1 has a negative focal power. Its object side surface S1 is a convex surface, and its image side surface S2 is a concave surface. The second lens E2 has a positive focal power. Its object side surface S3 is a convex surface, and its image side surface S4 is a concave surface. The third lens E3 has a positive focal power. Its object side surface S5 is a convex surface, and its image side surface S6 is a convex surface. The fourth lens E4 has a negative focal power. Its object side surface S7 is a concave surface, and its image side surface S8 is a concave surface. The fifth lens E5 has a negative focal power. Its object side surface S9 is a concave surface, and its image side surface S10 is a convex surface. The sixth lens E6 has a positive focal power. Its object side surface S11 is a convex surface, and its image side surface S12 is a convex surface. The seventh lens E7 has a negative focal power. Its object side surface S13 is a convex surface, and its image side surface S14 is a concave surface. The filter E8 has an object side surface S15 and an image side surface S16. Light from the object sequentially passes through the surfaces of S1 to S16 and finally forms an image on the imaging surface S17.

[0107] As shown in Table 4, it is the basic parameter table of the optical imaging lens of Embodiment 2. Among them, the units of the radius of curvature, thickness, and focal length are all millimeters (mm).

[0108] Surface number Surface type Radius of curvature Thickness Focal length Refractive index Dispersion coefficient Conic coefficient OBJ Spherical surface Infinity Infinity S1 Aspherical surface 133.4760 0.3754 -127.74 1.65 23.5 0.0000 S2 Aspherical surface 50.8675 0.0400 0.0000 S3 Aspherical surface 2.6588 0.5397 11.55 1.55 56.1 0.0000 S4 Aspherical surface 4.2695 0.2073 0.0000 STO Spherical surface Infinity 0.3270 S5 Aspherical surface 9.1487 0.5963 7.96 1.55 56.1 0.0000 S6 Aspherical surface -8.0714 0.5542 0.0000 S7 Aspherical surface -7.5396 0.3417 -10.72 1.68 19.2 0.0000 S8 Aspherical surface 202.4206 0.3353 0.0000 S9 Aspherical surface -6.6258 0.7247 -18.64 1.57 37.3 0.0000 S10 Aspherical surface -18.2883 0.0400 0.0000 S11 Aspherical surface 2.1043 0.7917 3.67 1.55 56.1 -1.0000 S12 Aspherical surface -35.1501 0.5818 0.0000 S13 Aspherical surface 5.3566 0.5377 -4.33 1.55 56.1 0.0000 S14 Aspherical surface 1.5810 0.4518 -1.0000 S15 Spherical surface Infinity 0.2125 1.52 64.2 S16 Spherical surface Infinity 0.7029 S17 Spherical surface Infinity

[0109] Table 4

[0110] As shown in Table 5, in Embodiment 2, the total effective focal length f of the optical imaging lens is 4.95 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 7.36 mm, and half of the diagonal length of the effective pixel region on the imaging surface S17 is ImgH = 5.44 mm. The parameters of each relationship are as explained in the first embodiment, and the values of each relationship are listed in the following table.

[0111]

[0112]

[0113] Table 5

[0114] In Embodiment 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 higher-order term coefficients A4, A6, A8, A 10 、A 12 、A 14 、A16 、A 18 、A 20 、A 22 、A 24 、A 26 、A 28 and A 30 。

[0115] Surface number A4 A6 A8 A10 A12 A14 A16 S1 3.1264E-02 -6.7934E-03 5.9590E-03 -4.3698E-03 2.3044E-03 -8.7348E-04 2.1902E-04 S2 3.5996E-02 1.5009E-02 -2.8459E-02 3.6433E-02 -2.9350E-02 1.4731E-02 -4.3979E-03 S3 -2.3630E-02 3.1633E-02 -4.8636E-02 2.5350E-02 6.1021E-02 -1.5043E-01 1.5951E-01 S4 -3.6225E-02 4.8963E-03 -6.7971E-03 4.1462E-02 -1.1598E-01 1.7360E-01 -1.5238E-01 S5 -1.6305E-02 -1.6406E-02 3.1162E-02 -6.0654E-02 7.1220E-02 -5.0352E-02 1.8215E-02 S6 -2.7757E-02 -2.5007E-02 7.0147E-02 -1.8340E-01 3.1276E-01 -3.5556E-01 2.7127E-01 S7 -8.4384E-02 5.5882E-02 -1.0054E-01 4.0710E-02 1.6724E-01 -3.7245E-01 4.0342E-01 S8 -6.9335E-02 5.5814E-02 -3.3955E-02 -5.0737E-02 1.3777E-01 -1.5617E-01 1.1050E-01 S9 -2.2707E-02 3.8885E-02 1.8862E-02 -7.9113E-02 8.4442E-02 -4.9887E-02 1.6539E-02 S10 -2.7341E-01 2.6509E-01 -1.8337E-01 1.1241E-01 -7.1934E-02 4.6791E-02 -2.5844E-02 S11 -1.7020E-01 1.6597E-01 -1.5279E-01 1.1287E-01 -6.5334E-02 2.8988E-02 -9.7013E-03 S12 2.0050E-01 -2.1538E-01 1.4735E-01 -7.2658E-02 2.6109E-02 -6.8748E-03 1.3341E-03 S13 -4.0863E-02 -3.2254E-02 3.2582E-02 -1.5444E-02 4.4927E-03 -8.4243E-04 1.0389E-04 S14 -1.3778E-01 4.9656E-02 -1.4897E-02 3.4900E-03 -6.3514E-04 9.0646E-05 -1.0167E-05 Surface number A18 A20 A22 A24 A26 A28 A30 S1 -3.2771E-05 2.1778E-06 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 S2 6.8326E-04 -3.9641E-05 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 S3 -9.7587E-02 3.5532E-02 -7.1729E-03 6.2097E-04 0.0000E+00 0.0000E+00 0.0000E+00 S4 7.9034E-02 -2.2463E-02 2.7095E-03 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 S5 -6.2509E-05 -2.6353E-03 9.3411E-04 -1.0717E-04 0.0000E+00 0.0000E+00 0.0000E+00 S6 -1.3697E-01 4.3863E-02 -8.0685E-03 6.5006E-04 0.0000E+00 0.0000E+00 0.0000E+00 S7 -2.6996E-01 1.1623E-01 -3.1470E-02 4.8912E-03 -3.3353E-04 0.0000E+00 0.0000E+00 S8 -5.2891E-02 1.7392E-02 -3.8668E-03 5.5370E-04 -4.5841E-05 1.6534E-06 0.0000E+00 S9 -1.5431E-03 -1.2507E-03 6.7741E-04 -1.7141E-04 2.5059E-05 -2.0342E-06 7.1254E-08 S10 1.0775E-02 -3.2433E-03 6.8938E-04 -1.0061E-04 9.5783E-06 -5.3501E-07 1.3289E-08 S11 2.4216E-03 -4.4575E-04 5.9445E-05 -5.5681E-06 3.4643E-07 -1.2825E-08 2.1334E-10 S12 -1.9108E-04 2.0093E-05 -1.5289E-06 8.1807E-08 -2.9180E-09 6.2290E-11 -6.0212E-13 S13 -8.3657E-06 4.1256E-07 -9.2510E-09 -1.7787E-10 1.8340E-11 -4.8983E-13 4.8091E-15 S14 8.8701E-07 -5.9024E-08 2.9146E-09 -1.0280E-10 2.4394E-12 -3.4812E-14 2.2544E-16

[0116] Table 6

[0117] Figure 4a shows the axial chromatic aberration curve of the optical imaging lens of Example 2, which represents the deviation of the convergence points of light rays with different wavelengths after passing through the lens. Figure 4b shows the astigmatism curve of the optical imaging lens of Example 2, which represents the curvature of the meridional image plane and the curvature of the sagittal image plane. Figure 4c shows the distortion curve of the optical imaging lens of Example 2, which represents the distortion magnitude values corresponding to different image heights. Figure 4d shows the lateral chromatic aberration curve of the optical imaging lens of Example 2, which represents the deviation of different image heights of light rays on the imaging plane after passing through the lens. According to Figures 4a to 4d as shown, the optical imaging lens given in Example 2 can achieve good imaging quality. Specific Embodiment 3

[0119] Figure 5 is a schematic structural diagram of the lens group of Embodiment 3 of the optical imaging lens of the present invention. The optical imaging lens sequentially includes, from the object side to the image side along the optical axis: a first lens E1, a second lens E2, a diaphragm STO, 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.

[0120] The first lens E1 has a negative optical power. Its object side surface S1 is a convex surface, and its image side surface S2 is a concave surface. The second lens E2 has a positive optical power. Its object side surface S3 is a convex surface, and its image side surface S4 is a concave surface. The third lens E3 has a positive optical power. Its object side surface S5 is a convex surface, and its image side surface S6 is a convex surface. The fourth lens E4 has a negative optical power. Its object side surface S7 is a concave surface, and its image side surface S8 is a convex surface. The fifth lens E5 has a negative optical power. Its object side surface S9 is a concave surface, and its image side surface S10 is a convex surface. The sixth lens E6 has a positive optical power. Its object side surface S11 is a convex surface, and its image side surface S12 is a convex surface. The seventh lens E7 has a negative optical power. Its object side surface S13 is a convex surface, and its image side surface S14 is a concave surface. The filter E8 has an object side surface S15 and an image side surface S16. Light from the object sequentially passes through the surfaces of S1 to S16 and finally forms an image on the imaging surface S17.

[0121] As shown in Table 7, it is the basic parameter table of the optical imaging lens of Embodiment 3, where the units of the radius of curvature, thickness, and focal length are all millimeters (mm).

[0122] Surface number Surface type Radius of curvature Thickness Focal length Refractive index Dispersion coefficient Conic coefficient OBJ Spherical surface Infinity Infinity S1 Aspherical surface 173.9788 0.3406 -125.45 1.65 23.5 0.0000 S2 Aspherical surface 55.1615 0.0400 0.0000 S3 Aspherical surface 2.6913 0.5409 11.51 1.55 56.1 0.0000 S4 Aspherical surface 4.3761 0.2022 0.0000 STO Spherical surface Infinity 0.3285 S5 Aspherical surface 9.1757 0.5654 8.12 1.55 56.1 0.0000 S6 Aspherical surface -8.3875 0.5449 0.0000 S7 Aspherical surface -7.2846 0.3477 -10.94 1.68 19.2 0.0000 S8 Aspherical surface -434.7826 0.3533 0.0000 S9 Aspherical surface -6.7459 0.7148 -19.62 1.57 37.3 0.0000 S10 Aspherical surface -17.6384 0.0400 0.0000 S11 Aspherical surface 2.1003 0.7974 3.65 1.55 56.1 -1.0000 S12 Aspherical surface -32.7556 0.5788 0.0000 S13 Aspherical surface 5.3866 0.5264 -4.33 1.55 56.1 0.0000 S14 Aspherical surface 1.5864 0.8473 -1.0000 S15 Spherical surface Infinity 0.2125 1.52 64.2 S16 Spherical surface Infinity 0.3042 S17 Spherical surface Infinity

[0123] Table 7

[0124] As shown in Table 8, in Embodiment 3, the total effective focal length f of the optical imaging lens is 4.91 mm, the distance TTL from the object side S1 of the first lens E1 to the imaging surface S17 on the optical axis is 7.28 mm, and half of the diagonal length of the effective pixel region on the imaging surface S17 is ImgH = 5.43 mm. The parameters of each relationship are as explained in the first embodiment, and the values of each relationship are listed in the following table.

[0125]

[0126]

[0127] Table 8

[0128] In Embodiment 3, the object side and the image side of any one of the first lens E1 to the seventh lens E7 are aspherical surfaces. Table 9 shows the higher-order term coefficients A4, A6, A8, A 10 , A 12 , A 14 , A 16 , A 18 , A 20 , A 22 , A 24 , A 26 , A 28 and A 30 that can be used for each aspherical mirror surface S1 - S14 in Embodiment 3.

[0129] Surface number A4 A6 A8 A10 A12 A14 A16 S1 3.4031E-02 -7.7150E-03 7.0605E-03 -5.4018E-03 2.9720E-03 -1.1753E-03 3.0747E-04 S2 3.7801E-02 1.6152E-02 -3.1385E-02 4.1174E-02 -3.3990E-02 1.7483E-02 -5.3487E-03 S3 -2.3991E-02 3.2360E-02 -5.0131E-02 2.6328E-02 6.3856E-02 -1.5862E-01 1.6946E-01 S4 -3.6638E-02 4.9803E-03 -6.9530E-03 4.2654E-02 -1.1999E-01 1.8063E-01 -1.5945E-01 S5 -1.6842E-02 -1.7224E-02 3.3251E-02 -6.5777E-02 7.8499E-02 -5.6405E-02 2.0739E-02 S6 -2.8643E-02 -2.6213E-02 7.4694E-02 -1.9838E-01 3.4365E-01 -3.9687E-01 3.0758E-01 S7 -8.5539E-02 5.7033E-02 -1.0331E-01 4.2117E-02 1.7420E-01 -3.9060E-01 4.2597E-01 S8 -7.1088E-02 5.7943E-02 -3.5693E-02 -5.4004E-02 1.4848E-01 -1.7043E-01 1.2211E-01 S9 -2.2001E-02 3.7085E-02 1.7707E-02 -7.3103E-02 7.6805E-02 -4.4663E-02 1.4575E-02 S10 -2.7352E-01 2.6525E-01 -1.8351E-01 1.1252E-01 -7.2020E-02 4.6856E-02 -2.5885E-02 S11 -1.7211E-01 1.6876E-01 -1.5623E-01 1.1605E-01 -6.7551E-02 3.0139E-02 -1.0143E-02 S12 2.0067E-01 -2.1566E-01 1.4760E-01 -7.2812E-02 2.6175E-02 -6.8952E-03 1.3386E-03 S13 -4.1128E-02 -3.2568E-02 3.3005E-02 -1.5695E-02 4.5805E-03 -8.6168E-04 1.0661E-04 S14 -1.3743E-01 4.9466E-02 -1.4821E-02 3.4678E-03 -6.3030E-04 8.9841E-05 -1.0064E-05 Surface number A18 A20 A22 A24 A26 A28 A30 S1 -4.7999E-05 3.3278E-06 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 S2 8.5156E-04 -5.0629E-05 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 S3 -1.0447E-01 3.8326E-02 -7.7957E-03 6.8001E-04 0.0000E+00 0.0000E+00 0.0000E+00 S4 8.3172E-02 -2.3774E-02 2.8838E-03 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 S5 -7.2333E-05 -3.0993E-03 1.1165E-03 -1.3020E-04 0.0000E+00 0.0000E+00 0.0000E+00 S6 -1.5776E-01 5.1320E-02 -9.5896E-03 7.8483E-04 0.0000E+00 0.0000E+00 0.0000E+00 S7 -2.8699E-01 1.2441E-01 -3.3914E-02 5.3071E-03 -3.6435E-04 0.0000E+00 0.0000E+00 S8 -5.9178E-02 1.9704E-02 -4.4357E-03 6.4314E-04 -5.3915E-05 1.9690E-06 0.0000E+00 S9 -1.3385E-03 -1.0679E-03 5.6934E-04 -1.4181E-04 2.0406E-05 -1.6305E-06 5.6218E-08 S10 1.0794E-02 -3.2497E-03 6.9088E-04 -1.0085E-04 9.6030E-06 -5.3650E-07 1.3328E-08 S11 2.5459E-03 -4.7125E-04 6.3196E-05 -5.9524E-06 3.7241E-07 -1.3863E-08 2.3190E-10 S12 -1.9181E-04 2.0178E-05 -1.5360E-06 8.2223E-08 -2.9341E-09 6.2660E-11 -6.0596E-13 S13 -8.6124E-06 4.2609E-07 -9.5854E-09 -1.8489E-10 1.9126E-11 -5.1248E-13 5.0477E-15 S14 8.7690E-07 -5.8277E-08 2.8740E-09 -1.0125E-10 2.3994E-12 -3.4197E-14 2.2118E-16

[0130] Table 9

[0131] Figure 6a shows the axial chromatic aberration curve of the optical imaging lens of Embodiment 3, which represents the deviation of the converging points of light rays of different wavelengths after passing through the lens. Figure 6b shows the astigmatism curve of the optical imaging lens of Embodiment 3, which represents the meridional image plane curvature and the sagittal image plane curvature. Figure 6c shows the distortion curve of the optical imaging lens of Embodiment 3, which represents the distortion magnitude values corresponding to different image heights. Figure 6d shows the lateral chromatic aberration curve of the optical imaging lens of Embodiment 3, which represents the deviation of different image heights of light rays on the imaging surface after passing through the lens. According to Figures 6a to 6dAs can be seen, the optical imaging lens given in Embodiment 3 can achieve good imaging quality. Specific Embodiment 4

[0133] Figure 7 FIG. is a schematic structural diagram of a lens group of Embodiment 4 of the optical imaging lens of the present invention. The optical imaging lens sequentially includes, along the optical axis from the object side to the image side: a first lens E1, a second lens E2, a diaphragm STO, 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.

[0134] The first lens E1 has a negative focal power, its object side surface S1 is concave, and its image side surface S2 is concave. The second lens E2 has a positive focal power, its object side surface S3 is convex, and its image side surface S4 is concave. The third lens E3 has a positive focal power, its object side surface S5 is convex, and its image side surface S6 is convex. The fourth lens E4 has a negative focal power, its object side surface S7 is concave, and its image side surface S8 is concave. The fifth lens E5 has a negative focal power, its object side surface S9 is concave, and its image side surface S10 is convex. The sixth lens E6 has a positive focal power, its object side surface S11 is convex, and its image side surface S12 is convex. The seventh lens E7 has a negative focal power, 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. Light from the object sequentially passes through the surfaces of S1 to S16 and finally forms an image on the imaging surface S17.

[0135] As shown in Table 10, it is a basic parameter table of the optical imaging lens of Embodiment 4, where the units of the radius of curvature, thickness, and focal length are all millimeters (mm).

[0136] Surface number Surface type Radius of curvature Thickness Focal length Refractive index Dispersion coefficient Conic coefficient OBJ Spherical surface Infinity Infinity S1 Aspherical surface -2389.6764 0.3407 -121.52 1.65 23.5 0.0000 S2 Aspherical surface 80.9913 0.0400 0.0000 S3 Aspherical surface 2.6834 0.5372 11.21 1.55 56.1 0.0000 S4 Aspherical surface 4.4435 0.1916 0.0000 STO Spherical surface Infinity 0.3446 S5 Aspherical surface 8.5815 0.5570 8.18 1.55 56.1 0.0000 S6 Aspherical surface -9.0909 0.5257 0.0000 S7 Aspherical surface -7.9399 0.3471 -10.80 1.68 19.2 0.0000 S8 Aspherical surface 94.8463 0.3287 0.0000 S9 Aspherical surface -6.5804 0.7221 -17.33 1.57 37.3 0.0000 S10 Aspherical surface -20.4775 0.0400 0.0000 S11 Aspherical surface 2.0669 0.7867 3.60 1.55 56.1 -1.0000 S12 Aspherical surface -34.3933 0.5817 0.0000 S13 Aspherical surface 5.3079 0.5450 -4.36 1.55 56.1 0.0000 S14 Aspherical surface 1.5829 0.5681 -1.0000 S15 Spherical surface Infinity 0.2125 1.52 64.2 S16 Spherical surface Infinity 0.5814 S17 Spherical surface Infinity

[0137] Table 10

[0138] As shown in Table 11, in Embodiment 4, the total effective focal length f of the optical imaging lens is 4.91 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 7.25 mm, and half of the diagonal length of the effective pixel region on the imaging surface S17 is ImgH = 5.40 mm. The parameters of each relationship are as explained in the first embodiment, and the values of each relationship are listed in the following table.

[0139]

[0140]

[0141] Table 11

[0142] In Embodiment 4, the object side and the image side of any one of the first lens E1 to the seventh lens E7 are aspherical surfaces. Table 12 shows the higher-order coefficients A4, A6, A8, A 10 , A 12 , A 14 , A 16 , A 18 , A 20 , A 22 , A 24 , A 26 , A 28 and A 30 .

[0143] Surface number A4 A6 A8 A10 A12 A14 A16 S1 3.4363E-02 -7.8283E-03 7.1991E-03 -5.5346E-03 3.0599E-03 -1.2160E-03 3.1966E-04 S2 3.8181E-02 1.6398E-02 -3.2024E-02 4.2225E-02 -3.5036E-02 1.8113E-02 -5.5705E-03 S3 -2.4506E-02 3.3408E-02 -5.2308E-02 2.7764E-02 6.8060E-02 -1.7087E-01 1.8450E-01 S4 -3.7075E-02 5.0696E-03 -7.1198E-03 4.3936E-02 -1.2433E-01 1.8828E-01 -1.6719E-01 S5 -1.6549E-02 -1.6776E-02 3.2103E-02 -6.2953E-02 7.4471E-02 -5.3044E-02 1.9332E-02 S6 -2.9147E-02 -2.6908E-02 7.7348E-02 -2.0723E-01 3.6213E-01 -4.2187E-01 3.2982E-01 S7 -8.9054E-02 6.0584E-02 -1.1198E-01 4.6578E-02 1.9657E-01 -4.4973E-01 5.0042E-01 S8 -7.2949E-02 6.0234E-02 -3.7587E-02 -5.7608E-02 1.6045E-01 -1.8657E-01 1.3541E-01 S9 -2.3874E-02 4.1920E-02 2.0850E-02 -8.9670E-02 9.8138E-02 -5.9449E-02 2.0209E-02 S10 -2.8422E-01 2.8098E-01 -1.9816E-01 1.2386E-01 -8.0811E-02 5.3594E-02 -3.0182E-02 S11 -1.7325E-01 1.7045E-01 -1.5832E-01 1.1799E-01 -6.8908E-02 3.0846E-02 -1.0415E-02 S12 2.0489E-01 -2.2250E-01 1.5387E-01 -7.6703E-02 2.7862E-02 -7.4165E-03 1.4549E-03 S13 -4.1794E-02 -3.3362E-02 3.4083E-02 -1.6338E-02 4.8067E-03 -9.1152E-04 1.1368E-04 S14 -1.3840E-01 4.9992E-02 -1.5031E-02 3.5295E-03 -6.4378E-04 9.2086E-05 -1.0352E-05 Surface number A18 A20 A22 A24 A26 A28 A30 S1 -5.0145E-05 3.4935E-06 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 S2 8.9174E-04 -5.3383E-05 1.1205E-08 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 S3 -1.1495E-01 4.2622E-02 -8.7623E-03 7.7249E-04 0.0000E+00 0.0000E+00 0.0000E+00 S4 8.7727E-02 -2.5225E-02 3.0781E-03 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 S5 -6.6838E-05 -2.8388E-03 1.0138E-03 -1.1718E-04 0.0000E+00 0.0000E+00 0.0000E+00 S6 -1.7065E-01 5.6001E-02 -1.0556E-02 8.7150E-04 0.0000E+00 0.0000E+00 0.0000E+00 S7 -3.4401E-01 1.5216E-01 -4.2322E-02 6.7575E-03 -4.7336E-04 0.0000E+00 0.0000E+00 S8 -6.6478E-02 2.2422E-02 -5.1134E-03 7.5103E-04 -6.3778E-05 2.3595E-06 0.0000E+00 S9 -1.9333E-03 -1.6067E-03 8.9234E-04 -2.3153E-04 3.4706E-05 -2.8887E-06 1.0376E-07 S10 1.2829E-02 -3.9375E-03 8.5331E-04 -1.2698E-04 1.2325E-05 -7.0191E-07 1.7776E-08 S11 2.6230E-03 -4.8713E-04 6.5543E-05 -6.1939E-06 3.8880E-07 -1.4522E-08 2.4372E-10 S12 -2.1065E-04 2.2392E-05 -1.7224E-06 9.3166E-08 -3.3594E-09 7.2494E-11 -7.0839E-13 S13 -9.2580E-06 4.6173E-07 -1.0471E-08 -2.0360E-10 2.1232E-11 -5.7347E-13 5.6941E-15 S14 9.0518E-07 -6.0368E-08 2.9877E-09 -1.0562E-10 2.5119E-12 -3.5927E-14 2.3319E-16

[0144] Table 12

[0145] Figure 8a shows the axial chromatic aberration curve of the optical imaging lens of Embodiment 4, which represents the deviation of the convergence points of light rays of different wavelengths after passing through the lens. Figure 8b shows the astigmatism curve of the optical imaging lens of Embodiment 4, which represents the meridional image plane curvature and the sagittal image plane curvature. Figure 8c shows the distortion curve of the optical imaging lens of Embodiment 4, which represents the distortion magnitude values corresponding to different image heights. Figure 8d shows the longitudinal chromatic aberration curve of the optical imaging lens of Embodiment 4, which represents the deviation of different image heights on the imaging plane after the light rays pass through the lens. According to Figures 8a to 8d shown, the optical imaging lens given in Embodiment 4 can achieve good imaging quality. Specific Embodiment 5

[0147] Figure 9 is a schematic structural diagram of the lens group of Embodiment 5 of the optical imaging lens of the present invention. The optical imaging lens sequentially includes, along the optical axis from the object side to the image side: a first lens E1, a second lens E2, a stop STO, a third lens E3, a fourth lens E4, a 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 a negative optical power, its object side S1 is concave, and its image side S2 is convex. The second lens E2 has a positive optical power, its object side S3 is convex, and its image side S4 is concave. The third lens E3 has a positive optical power, its object side S5 is convex, and its image side S6 is convex. The fourth lens E4 has a negative optical power, its object side S7 is concave, and its image side S8 is concave. The fifth lens E5 has a negative optical power, its object side S9 is concave, and its image side S10 is convex. The sixth lens E6 has a positive optical power, its object side S11 is convex, and its image side S12 is convex. The seventh lens E7 has a negative optical power, its object side S13 is convex, and its image side S14 is concave. The filter E8 has an object side S15 and an image side S16. The light from the object sequentially passes through the surfaces of S1 to S16 and finally forms an image on the imaging surface S17.

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

[0150] Surface number Surface type Radius of curvature Thickness Focal length Refractive index Dispersion coefficient Conic coefficient OBJ Spherical surface Infinity Infinity S1 Aspherical surface -33.0479 0.3419 -109.42 1.65 23.5 0.0000 S2 Aspherical surface -62.4390 0.0400 0.0000 S3 Aspherical surface 2.7884 0.5488 9.09 1.55 56.1 0.0000 S4 Aspherical surface 5.9305 0.1933 0.0000 STO Spherical surface Infinity 0.4714 S5 Aspherical surface 8.9321 0.5133 11.39 1.55 56.1 0.0000 S6 Aspherical surface -20.0000 0.5081 0.0000 S7 Aspherical surface -11.7765 0.3182 -13.46 1.68 19.2 0.0000 S8 Aspherical surface 40.8103 0.2493 0.0000 S9 Aspherical surface -7.0585 0.8034 -20.10 1.57 37.3 0.0000 S10 Aspherical surface -19.1259 0.0400 0.0000 S11 Aspherical surface 2.1139 0.7772 3.72 1.55 56.1 -1.0000 S12 Aspherical surface -42.8132 0.5848 0.0000 S13 Aspherical surface 5.3208 0.4852 -4.38 1.55 56.1 0.0000 S14 Aspherical surface 1.5950 0.5702 -1.0000 S15 Spherical surface Infinity 0.2125 1.52 64.2 S16 Spherical surface Infinity 0.5823 S17 Spherical surface Infinity

[0151] Table 13

[0152] As shown in Table 14, in Embodiment 5, the total effective focal length f of the optical imaging lens is 4.91 mm, the distance TTL on the optical axis from the object side S1 of the first lens E1 to the imaging surface S17 is 7.24 mm, and half of the diagonal length of the effective pixel region on the imaging surface S17 is ImgH = 5.39 mm. The parameters of each relationship are as explained in the first embodiment, and the values of each relationship are listed in the following table.

[0153]

[0154] Table 14

[0155] In Embodiment 5, the object side and the image side of any one of the first lens E1 to the seventh lens E7 are aspherical surfaces. Table 15 shows the high-order term coefficients A4, A6, A8, A 10 , A 12 , A 14 , A 16 , A 18 , A 20 , A 22 , A 24 , A 26 , A 28 and A 30 that can be used for the aspherical surfaces S1 - S14 in Embodiment 5.

[0156] Surface number A4 A6 A8 A10 A12 A14 A16 S1 2.2474E-02 -4.1403E-03 3.0792E-03 -1.9144E-03 8.5595E-04 -2.7508E-04 5.8479E-05 S2 2.3887E-02 8.1136E-03 -1.2533E-02 1.3070E-02 -8.5770E-03 3.5070E-03 -8.5289E-04 S3 -1.7751E-02 2.0595E-02 -2.7444E-02 1.2397E-02 2.5865E-02 -5.5264E-02 5.0786E-02 S4 -2.3300E-02 2.5257E-03 -2.8119E-03 1.3756E-02 -3.0860E-02 3.7047E-02 -2.6079E-02 S5 -1.2778E-02 -1.1382E-02 1.9139E-02 -3.2979E-02 3.4281E-02 -2.1456E-02 6.8714E-03 S6 -2.2830E-02 -1.8653E-02 4.7455E-02 -1.1252E-01 1.7402E-01 -1.7942E-01 1.2415E-01 S7 -7.8470E-02 5.0111E-02 -8.6942E-02 3.3948E-02 1.3449E-01 -2.8882E-01 3.0167E-01 S8 -6.6369E-02 5.2272E-02 -3.1112E-02 -4.5484E-02 1.2083E-01 -1.3401E-01 9.2775E-02 S9 -2.3674E-02 4.1395E-02 2.0503E-02 -8.7805E-02 9.5695E-02 -5.7726E-02 1.9541E-02 S10 -2.6551E-01 2.5369E-01 -1.7293E-01 1.0447E-01 -6.5880E-02 4.2229E-02 -2.2986E-02 S11 -1.6589E-01 1.5970E-01 -1.4515E-01 1.0586E-01 -6.0494E-02 2.6499E-02 -8.7551E-03 S12 1.9635E-01 -2.0872E-01 1.4131E-01 -6.8954E-02 2.4520E-02 -6.3891E-03 1.2269E-03 S13 -4.0208E-02 -3.1482E-02 3.1546E-02 -1.4832E-02 4.2801E-03 -7.9612E-04 9.7388E-05 S14 -1.3577E-01 4.8574E-02 -1.4466E-02 3.3642E-03 -6.0777E-04 8.6105E-05 -9.5867E-06 Surface number A18 A20 A22 A24 A26 A28 A30 S1 -7.4188E-06 4.1799E-07 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 S2 1.0794E-04 -5.1016E-06 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 S3 -2.6929E-02 8.4981E-03 -1.4869E-03 1.1156E-04 0.0000E+00 0.0000E+00 0.0000E+00 S4 1.0848E-02 -2.4727E-03 2.3920E-04 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 S5 -2.0875E-05 -7.7909E-04 2.4447E-04 -2.4831E-05 0.0000E+00 0.0000E+00 0.0000E+00 S6 -5.6850E-02 1.6511E-02 -2.7544E-03 2.0126E-04 0.0000E+00 0.0000E+00 0.0000E+00 S7 -1.9467E-01 8.0825E-02 -2.1103E-02 3.1629E-03 -2.0798E-04 0.0000E+00 0.0000E+00 S8 -4.3445E-02 1.3977E-02 -3.0403E-03 4.2594E-04 -3.4501E-05 1.2175E-06 0.0000E+00 S9 -1.8616E-03 -1.5406E-03 8.5203E-04 -2.2014E-04 3.2861E-05 -2.7236E-06 9.7416E-08 S10 9.4434E-03 -2.8013E-03 5.8676E-04 -8.4392E-05 7.9170E-06 -4.3578E-07 1.0667E-08 S11 2.1576E-03 -3.9209E-04 5.1622E-05 -4.7737E-06 2.9322E-07 -1.0716E-08 1.7600E-10 S12 -1.7390E-04 1.8096E-05 -1.3626E-06 7.2152E-08 -2.5468E-09 5.3800E-11 -5.1464E-13 S13 -7.7791E-06 3.8054E-07 -8.4645E-09 -1.6143E-10 1.6512E-11 -4.3746E-13 4.2603E-15 S14 8.3030E-07 -5.4846E-08 2.6885E-09 -9.4135E-11 2.2174E-12 -3.1412E-14 2.0194E-16

[0157] Table 15

[0158] Figure 10a Fig. shows the axial chromatic aberration curve of the optical imaging lens of Example 5, which represents the deviation of the focus points of light rays with different wavelengths after passing through the lens. Figure 10b Fig. Figure 10b shows the astigmatism curve of the optical imaging lens of Example 5, which represents the curvature of the meridional image plane and the sagittal image plane. Figure 10c Fig. Figure 10c shows the distortion curve of the optical imaging lens of Example 5, which represents the distortion values corresponding to different image heights. Figure 10d Fig. Figure 10d shows the lateral chromatic aberration curve of the optical imaging lens of Example 5, which represents the deviation of different image heights on the imaging plane after the light rays pass through the lens. According to Figures 10a to 10d As can be seen from Fig. Figures 10a to 10d , the optical imaging lens given in Example 5 can achieve good imaging quality. Specific Example 6

[0160] Figure 11 Fig. Figure 11 is a schematic structural diagram of the lens group of the optical imaging lens according to Example 6 of the present invention. The optical imaging lens sequentially includes, from the object side to the image side along the optical axis: a first lens E1, a second lens E2, a stop STO, a third lens E3, a fourth lens E4, a fifth lens E5, a sixth lens E6, a seventh lens E7, a filter E8, and an imaging surface S17.

[0161] The first lens E1 has a negative optical power. Its object side surface S1 is concave, and its image side surface S2 is concave. The second lens E2 has a positive optical power. Its object side surface S3 is convex, and its image side surface S4 is concave. The third lens E3 has a positive optical power. Its object side surface S5 is convex, and its image side surface S6 is convex. The fourth lens E4 has a negative optical power. Its object side surface S7 is concave, and its image side surface S8 is convex. The fifth lens E5 has a negative optical power. Its object side surface S9 is concave, and its image side surface S10 is convex. The sixth lens E6 has a positive optical power. Its object side surface S11 is convex, and its image side surface S12 is convex. The seventh lens E7 has a negative optical power. 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 sequentially passes through the surfaces S1 to S16 and finally forms an image on the imaging surface S17.

[0162] As shown in Table 16, it is the basic parameter table of the optical imaging lens of Example 6, where the units of the radius of curvature, thickness, and focal length are all millimeters (mm).

[0163] Surface number Surface type Radius of curvature Thickness Focal length Refractive index Dispersion coefficient Conic coefficient OBJ Spherical surface Infinity Infinity S1 Aspherical surface -666.6667 0.3450 -132.90 1.65 23.5 0.0000 S2 Aspherical surface 98.3163 0.0400 0.0000 S3 Aspherical surface 2.7091 0.5487 11.45 1.55 56.1 0.0000 S4 Aspherical surface 4.4422 0.2016 0.0000 STO Spherical surface Infinity 0.3261 S5 Aspherical surface 9.1177 0.5621 8.19 1.55 56.1 0.0000 S6 Aspherical surface -8.5603 0.5433 0.0000 S7 Aspherical surface -7.3109 0.3406 -10.90 1.68 19.2 0.0000 S8 Aspherical surface -769.2308 0.3472 0.0000 S9 Aspherical surface -6.7885 0.7119 -18.65 1.57 37.3 0.0000 S10 Aspherical surface -19.4771 0.0400 0.0000 S11 Aspherical surface 2.0907 0.7992 3.63 1.55 56.1 -1.0000 S12 Aspherical surface -32.7346 0.5780 0.0000 S13 Aspherical surface 5.3682 0.5345 -4.37 1.55 56.1 0.0000 S14 Aspherical surface 1.5932 0.8333 -1.0000 S15 Spherical surface Infinity 0.2125 1.52 64.2 S16 Spherical surface Infinity 0.3161 S17 Spherical surface Infinity

[0164] Table 16

[0165] As shown in Table 17, in Embodiment 6, the total effective focal length f of the optical imaging lens is 4.91 mm, the distance TTL from the object side S1 of the first lens E1 to the imaging surface S17 on the optical axis is 7.28 mm, and half of the diagonal length of the effective pixel region on the imaging surface S17 is ImgH = 5.44 mm. 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.

[0166]

[0167] Table 17

[0168] In Embodiment 6, the object side and the image side of any one of the first lens E1 to the seventh lens E7 are aspherical surfaces. Table 18 shows the higher-order term coefficients A4, A6, A8, A 10 、A 12 、A 14 、A 16 、A 18 、A 20 、A 22 、A 24 、A 26 、A 28 and A 30 that can be used for each aspherical mirror surface S1 - S14 in Embodiment 6.

[0169]

[0170]

[0171] Table 18

[0172] Figure 12a shows the axial chromatic aberration curve of the optical imaging lens in Embodiment 6, which represents the deviation of the convergence points of light rays with different wavelengths after passing through the lens. Figure 12b shows the astigmatism curve of the optical imaging lens in Embodiment 6, which represents the meridional image plane curvature and the sagittal image plane curvature. Figure 12c shows the distortion curve of the optical imaging lens in Embodiment 6, which represents the distortion magnitude values corresponding to different image heights. Figure 12d shows the longitudinal chromatic aberration curve of the optical imaging lens in Embodiment 6, which represents the deviation of different image heights on the imaging surface after the light rays pass through the lens. According to Figures 12a to 12d as shown, it can be known that the optical imaging lens given in Embodiment 6 can achieve good imaging quality. Specific Embodiment 7

[0174] Figure 13This 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 sequentially includes, along the optical axis from the object side to the image side: a first lens E1, a second lens E2, a stop STO, a third lens E3, a fourth lens E4, a fifth lens E5, a sixth lens E6, a seventh lens E7, a filter E8, and an imaging surface S17.

[0175] The first lens E1 has a negative optical power. Its object side surface S1 is concave, and its image side surface S2 is convex. The second lens E2 has a positive optical power. Its object side surface S3 is convex, and its image side surface S4 is concave. The third lens E3 has a positive optical power. Its object side surface S5 is convex, and its image side surface S6 is convex. The fourth lens E4 has a negative optical power. Its object side surface S7 is concave, and its image side surface S8 is convex. The fifth lens E5 has a negative optical power. Its object side surface S9 is concave, and its image side surface S10 is concave. The sixth lens E6 has a positive optical power. Its object side surface S11 is convex, and its image side surface S12 is convex. The seventh lens E7 has a negative optical power. 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. Light from the object sequentially passes through the surfaces of S1 to S16 and finally forms an image on the imaging surface S17.

[0176] As shown in Table 19, it is the basic parameter table of the optical imaging lens of Embodiment 7, where the units of the radius of curvature, thickness, and focal length are all millimeters (mm).

[0177] Surface number Surface type Radius of curvature Thickness Focal length Refractive index Dispersion coefficient Conic coefficient [[ID= ​ ​ ​ S1 ​ -23.8794 0.3793 -127.94 1.65 23.5 0.0000 S2 ​ -33.8216 0.0400 0.0000 S3 ​ 2.6558 0.4871 10.55 1.55 56.1 0.0000 S4 ​ 4.6136 0.1850 0.0000 ​ ​ ​ 0.3833 S5 ​ 10.5624 0.6205 7.74 1.55 56.1 0.0000 S6 ​ -6.8823 0.5460 0.0000 S7 ​ -5.4762 0.3000 -9.40 1.68 19.2 0.0000 S8 ​ -39.9680 0.3069 0.0000 S9 ​ -6.8077 0.6390 -11.71 1.57 37.3 0.0000 S10 ​ 370.3704 0.0400 0.0000 S11 ​ 1.9522 0.8809 3.46 1.55 56.1 -1.0000 S12 ​ -47.6828 0.5694 0.0000 S13 ​ 5.1802 0.5652 -4.74 1.55 56.1 0.0000 S14 ​ 1.6585 0.8191 -1.0000 S15 ​ ​ 0.2125 1.52 64.2 S16 ​ ​ 0.3059 S17 ​ ​

[0178] Table 19

[0179] As shown in Table 20, in Embodiment 7, the total effective focal length f of the optical imaging lens is 4.91 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 7.28 mm, and half of the diagonal length of the effective pixel area on the imaging surface S17 is ImgH = 5.41 mm. The parameters of each relationship are as explained in the first embodiment, and the values of each relationship are listed in the following table.

[0180]

[0181] Table 20

[0182] In Embodiment 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 higher-order term coefficients A4, A6, A8, A 10 、A 12 、A 14 、A 16 、A 18 、A 20, A 22 , A 24 , A 26 , A 28 and A 30 .

[0183]

[0184]

[0185] Table 21

[0186] ​ shows the axial chromatic aberration curve of the optical imaging lens of Example 7, which represents the deviation of the convergence points of light rays with different wavelengths after passing through the lens. ​ shows the astigmatism curve of the optical imaging lens of Example 7, which represents the curvature of the meridional image plane and the curvature of the sagittal image plane. ​ shows the distortion curve of the optical imaging lens of Example 7, which represents the distortion magnitude values corresponding to different image heights. ​ shows the lateral chromatic aberration curve of the optical imaging lens of Example 7, which represents the deviation of different image heights on the imaging plane after the light rays pass through the lens. According to ​ as shown, the optical imaging lens given in Example 7 can achieve good imaging quality. Specific Example 8

[0188] ​ is a schematic structural diagram of the lens group of the optical imaging lens of Example 8 of the present invention. The optical imaging lens sequentially includes, along the optical axis from the object side to the image side: a first lens E1, a second lens E2, a diaphragm STO, 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.

[0189] The first lens E1 has a negative optical power. Its object side surface S1 is concave, and its image side surface S2 is concave. The second lens E2 has a positive optical power. Its object side surface S3 is convex, and its image side surface S4 is concave. The third lens E3 has a positive optical power. Its object side surface S5 is convex, and its image side surface S6 is convex. The fourth lens E4 has a negative optical power. Its object side surface S7 is concave, and its image side surface S8 is convex. The fifth lens E5 has a negative optical power. Its object side surface S9 is concave, and its image side surface S10 is concave. The sixth lens E6 has a positive optical power. Its object side surface S11 is convex, and its image side surface S12 is convex. The seventh lens E7 has a negative optical power. 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. Light from the object sequentially passes through the surfaces of surfaces S1 to S16 and finally forms an image on the imaging surface S17.

[0190] As shown in Table 22, it is the basic parameter table of the optical imaging lens of Example 8. Among them, the units of the radius of curvature, thickness, and focal length are all millimeters (mm).

[0191]

[0192]

[0193] Table 22

[0194] As shown in Table 23, in Example 8, the total effective focal length f of the optical imaging lens is 4.91 mm, the distance TTL on the optical axis from the object side S1 of the first lens E1 to the imaging surface S17 is 7.28 mm, and half of the diagonal length of the effective pixel area on the imaging surface S17 is ImgH = 5.40 mm. The parameters of each relationship are as explained in the first embodiment, and the values of each relationship are listed in the following table.

[0195]

[0196] Table 23

[0197] In Example 8, the object side and the image side of any one of the first lens E1 to the seventh lens E7 are aspherical surfaces. Table 24 shows the higher-order term coefficients A4, A6, A8, A 10 、A 12 、A 14 、A 16 、A 18 、A 20 、A 22 、A 24 、A 26 、A 28 and A 30 for the aspherical mirror surfaces S1 - S14 in Example 8.

[0198]

[0199]

[0200] Table 24

[0201] ​ shows the axial chromatic aberration curve of the optical imaging lens of Example 8, which represents the deviation of the convergence points of light rays of different wavelengths after passing through the lens. ​ shows the astigmatism curve of the optical imaging lens of Example 8, which represents the meridional image plane curvature and the sagittal image plane curvature. ​ shows the distortion curve of the optical imaging lens of Example 8, which represents the distortion magnitude values corresponding to different image heights. ​Shows the longitudinal chromatic aberration curve of the optical imaging lens of Embodiment 8, which represents the deviation of different image heights on the imaging surface after light passes through the lens. According to ​ As can be seen, the optical imaging lens given in Embodiment 8 can achieve good imaging quality. Specific Embodiment 9

[0203] ​ FIG. is a schematic structural diagram of the lens group of Embodiment 9 of the optical imaging lens of the present invention. The optical imaging lens sequentially includes, along the optical axis from the object side to the image side: a first lens E1, a second lens E2, a diaphragm STO, 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.

[0204] The first lens E1 has a negative optical power, its object side surface S1 is convex, and its image side surface S2 is concave. The second lens E2 has a positive optical power, its object side surface S3 is convex, and its image side surface S4 is concave. The third lens E3 has a positive optical power, its object side surface S5 is convex, and its image side surface S6 is convex. The fourth lens E4 has a negative optical power, its object side surface S7 is concave, and its image side surface S8 is concave. The fifth lens E5 has a negative optical power, its object side surface S9 is concave, and its image side surface S10 is concave. The sixth lens E6 has a positive optical power, its object side surface S11 is convex, and its image side surface S12 is convex. The seventh lens E7 has a negative optical power, 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. Light from the object sequentially passes through the surfaces of S1 to S16 and finally forms an image on the imaging surface S17.

[0205] As shown in Table 25, it is the basic parameter table of the optical imaging lens of Embodiment 9, where the units of the radius of curvature, thickness, and focal length are all millimeters (mm).

[0206]

[0207]

[0208] Table 25

[0209] As shown in Table 26, in Embodiment 9, the total effective focal length f of the optical imaging lens is 4.96 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 7.29 mm, and half of the diagonal length of the effective pixel area on the imaging surface S17 is ImgH = 5.40 mm. The parameters of each relationship are as explained in the first embodiment, and the values of each relationship are listed in the following table.

[0210]

[0211] Table 26

[0212] In Embodiment 9, the object side and the image side of any one of the first lens E1 to the seventh lens E7 are aspherical surfaces. Table 27 shows the higher-order coefficients A4, A6, A8, A 10 , A 12 , A 14 , A 16 , A 18 , A 20 , A 22 , A 24 , A 26 , A 28 and A 30 .

[0213]

[0214]

[0215] Table 27

[0216] ​ shows the axial chromatic aberration curve of the optical imaging lens of Embodiment 9, which represents the deviation of the convergence points of light rays of different wavelengths after passing through the lens. ​ shows the astigmatism curve of the optical imaging lens of Embodiment 9, which represents the meridional image plane curvature and the sagittal image plane curvature. ​ shows the distortion curve of the optical imaging lens of Embodiment 9, which represents the distortion magnitude values corresponding to different image heights. ​ shows the lateral chromatic aberration curve of the optical imaging lens of Embodiment 9, which represents the deviation of different image heights on the imaging plane after the light rays pass through the lens. According to Figures 18a to 18d shown, the optical imaging lens given in Embodiment 9 can achieve good imaging quality.

[0217] The above are only the preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, improvements, equivalent replacements, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. An optical imaging lens, characterized in that, The number of lenses with optical power in the optical imaging lens is seven, and these seven lenses are sequentially arranged from the object side to the image side along the optical axis as follows: A first lens with negative optical power; A second lens with positive optical power, having a convex object side and a concave image side; A third lens with positive optical power, having a convex object side and a convex image side; A fourth lens with negative optical power, having a concave object side; A fifth lens with negative optical power, having a concave object side; A sixth lens with positive optical power, having a convex object side and a convex image side; A seventh lens with negative optical power, having a convex object side and a concave image side; Wherein, half of the diagonal length ImgH of the effective pixel area on the imaging surface of the optical imaging lens and the axial distance TTL from the object side of the first lens of the optical imaging lens to the imaging surface satisfy: 4.0mm ≤ ImgH × ImgH / TTL ≤ 4.11mm; The combined focal length f12 of the first and second lenses, the central thickness CT1 of the first lens on the optical axis, and the central thickness CT2 of the second lens on the optical axis satisfy: 11.11 ≤ f12 / (CT1 + CT2) ≤ 14.45; The effective focal length f4 of the fourth lens, the effective focal length f7 of the seventh lens, and the effective focal length f5 of the fifth lens satisfy: 0.78 ≤ (f4 + f7) / f5 ≤ 1.

24.

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 surface and half of the diagonal length ImgH of the effective pixel area on the imaging surface satisfy: 1.32 ≤ 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 maximum field of view FOV of the optical imaging lens satisfy: 5.28mm ≤ f × tan(1 / 2 FOV) ≤ 5.33mm.

4. The optical imaging lens according to claim 1, wherein: The effective focal length f3 of the third lens, the effective focal length f6 of the sixth lens, and the effective focal length f2 of the second lens satisfy: 0.96 ≤ (f3 + f6) / f2 ≤ 1.

66.

5. The optical imaging lens according to claim 1, wherein: 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 satisfy: 1.61 ≤ R4 / R3 ≤ 2.

13.

6. The optical imaging lens according to claim 1, wherein: The radius of curvature R12 of the image side of the sixth lens and the radius of curvature R11 of the object side of the sixth lens satisfy: 1.06 ≤ (R12 - R11) / (R12 + R11) ≤ 1.

14.

7. The optical imaging lens according to claim 1, wherein: The radius of curvature R14 of the image side of the seventh lens and the radius of curvature R13 of the object side of the seventh lens satisfy: 1.83 ≤ (R13 + R14) / (R13 - R14) ≤ 1.

94.

8. The optical imaging lens according to claim 1, characterized in that: The air gap T23 between the second lens and the third lens on the optical axis, the air gap T34 between the third lens and the fourth lens on the optical axis, and the central thickness CT3 of the third lens on the optical axis satisfy: 1.74 ≤ (T23 + T34) / CT3 ≤ 2.

28.

9. The optical imaging lens according to claim 1, wherein: The radius of curvature R7 of the object side of the fourth lens, the radius of curvature R9 of the object side of the fifth lens, and the combined focal length f45 of the fourth and fifth lenses satisfy: 2.02 ≤ (R7 + R9) / f45 ≤ 2.

64.

10. The optical imaging lens according to claim 1, characterized in that: The central thickness CT5 of the fifth lens on the optical axis and the edge thickness ET5 of the fifth lens satisfy: 1.81 ≤ CT5 / ET5 ≤ 2.

31.

11. The optical imaging lens according to claim 1, characterized in that: The edge thickness ET6 of the sixth lens and the central thickness CT6 of the sixth lens on the optical axis satisfy: 0.98 ≤ ET6 / CT6 ≤ 1.

14.

12. The optical imaging lens according to claim 1, wherein: The axial distance SAG41 between the intersection of the object side surface of the fourth lens and the optical axis and the vertex of the effective radius of the object side surface of the fourth lens and the axial distance SAG42 between the intersection of the image side surface of the fourth lens and the optical axis and the vertex of the effective radius of the image side surface of the fourth lens satisfy: 1.38 ≤ SAG41 / SAG42 ≤ 1.5.

Images