An optical imaging lens

Abstract

The present invention discloses 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 optical power, whose object side is concave and image side is concave; a second lens; a third lens with a positive optical power; a fourth lens, whose object side is concave and image side is convex; a fifth lens with a negative optical power; a sixth lens with a positive optical power; and a seventh lens with a negative optical power, whose object side is concave and image side is convex; wherein, half of the diagonal length of the effective pixel area on the imaging surface ImgH and the effective focal length f of the optical imaging lens satisfy: 1.4 < ImgH / f < 2.8; the effective focal length f1 of the first lens and the effective focal length f of the optical imaging lens satisfy: -2.0 < f1 / f < -1.5; the effective focal length f4 of the fourth lens, the effective focal length f3 of the third lens, and the effective focal length f6 of the sixth lens satisfy: 0.6 < f4 / (f3 + f6) < 1.9. The optical imaging lens provided by the present invention has an ultra-large field of view and can achieve good imaging effects on the basis of ensuring the miniaturization of the lens.

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] With the continuous development of smartphone shooting technology, the camera module has evolved from single-shot, dual-shot to triple-shot, and even quadruple-shot. Among them, equipping at least one ultra-wide-angle lens has become the mainstream trend. When the size of the sensor image plane is the same, the larger the full field of view angle of the optical imaging lens, the more information the captured image contains. Therefore, it is required that the optical imaging lens has a larger full field of view angle to further improve the shooting performance.

[0003] Therefore, there is a need for a seven-piece optical imaging lens that has an ultra-large field of view angle and can achieve good imaging effects while ensuring the miniaturization of the lens. Summary of the Invention

[0004] The present invention aims to provide an optical imaging lens composed of seven lenses that has an ultra-large field of view angle and can achieve good imaging effects while ensuring the miniaturization of the lens.

[0005] One aspect of 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 negative optical power, whose object side is concave and image side is concave; a second lens; a third lens with positive optical power; a fourth lens, whose object side is concave and image side is convex; a fifth lens with negative optical power; a sixth lens with positive optical power; and a seventh lens with negative optical power, whose object side is concave and image side is convex.

[0006] Wherein, half of the diagonal length of the effective pixel region on the imaging surface ImgH and the effective focal length f of the optical imaging lens satisfy: 1.4 < ImgH / f < 2.8.

[0007] According to an embodiment of the present invention, the effective focal length f1 of the first lens and the effective focal length f of the optical imaging lens satisfy: -2.0 < f1 / f < -1.5.

[0008] According to an embodiment of the present invention, the effective focal length f4 of the fourth lens, the effective focal length f3 of the third lens, and the effective focal length f6 of the sixth lens satisfy: 0.6 < f4 / (f3 + f6) < 1.9.

[0009] According to an embodiment of the present invention, the effective focal length f5 of the fifth lens and the effective focal length f7 of the seventh lens satisfy: 1.5 < f5 / f7 < 2.3.

[0010] According to an embodiment of the present invention, the radius of curvature R2 of the image side surface of the first lens and the radius of curvature R1 of the object side surface of the first lens satisfy: -1.5 < R2 / R1 < -1.0.

[0011] 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, the radius of curvature R3 of the object side surface of the second lens, and the radius of curvature R4 of the image side surface of the second lens satisfy: 1.4 < TTL / (R3 + R4) < 1.7.

[0012] According to an embodiment of the present invention, the radius of curvature R11 of the object side surface of the sixth lens, the radius of curvature R12 of the image side surface of the sixth lens, the radius of curvature R9 of the object side surface of the fifth lens, and the radius of curvature R10 of the image side surface of the fifth lens satisfy: 6.5 < (R11 - R12) / (R9 - R10) < 8.2.

[0013] According to an embodiment of the present invention, the central thickness CT6 of the sixth lens on the optical axis and the air gap T12 between the first lens and the second lens on the optical axis satisfy: 1.2 < CT6 / T12 < 1.7.

[0014] According to an embodiment of the present invention, the maximum effective semi-aperture DT12 of the image side surface of the first lens, the maximum effective semi-aperture DT31 of the object side surface of the third lens, and the maximum effective semi-aperture DT32 of the image side surface of the third lens satisfy: 1.0 < DT12 / (DT31 + DT32) < 1.4.

[0015] According to an embodiment of the present invention, the maximum effective semi-aperture DT71 of the object side surface of the seventh lens, the maximum effective semi-aperture DT72 of the image side surface of the seventh lens, and half of the diagonal length ImgH of the effective pixel region on the imaging surface satisfy: 1.2 < (DT71 + DT72) / ImgH < 1.5.

[0016] According to an embodiment of the present invention, the combined focal length f34 of the third and fourth lenses, the combined focal length f56 of the fifth and sixth lenses, and the combined focal length f67 of the sixth and seventh lenses satisfy: 0.7 < (f34 + f56) / f67 < 1.3.

[0017] According to an embodiment of the present invention, the on-axis distance SL from the aperture stop to the imaging surface, 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 satisfy: 4.0 < SL / (CT3 + CT4) < 5.0.

[0018] According to an embodiment of the present invention, the axial distance SAG51 between the intersection point 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, the axial distance SAG62 between the intersection point 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 SAG71 between the intersection point 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 satisfy: 1.2 < (SAG51 + SAG62) / SAG71 < 1.6.

[0019] According to an embodiment of the present invention, the edge thickness ET5 of the fifth lens and the edge thickness ET6 of the sixth lens satisfy: 1.6 < ET5 / ET6 < 2.1.

[0020] According to an embodiment of the present invention, the edge thickness ET7 of the seventh lens and the central thickness CT7 of the seventh lens on the optical axis satisfy: 3.0 < ET7 / CT7 < 3.8.

[0021] Another aspect of 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 optical power, whose object side surface is concave and image side surface is concave; a second lens; a third lens with a positive optical power; a fourth lens, whose object side surface is concave and image side surface is convex; a fifth lens with a negative optical power; a sixth lens with a positive optical power; and a seventh lens with a negative optical power, whose object side surface is concave and image side surface is convex.

[0022] Wherein, 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 the effective focal length f of the optical imaging lens satisfy: -2.0 < f1 / f < -1.5.

[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 positive and negative distribution of the optical powers of the various components of the system, the optical imaging lens of the present invention can effectively balance the low-order aberrations of the system, reduce the sensitivity to tolerances, so that the optical imaging lens has good imaging quality. On the basis of ensuring the miniaturization of the lens, it has an ultra-large field of view and can achieve good imaging effects. 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. Figure 1Schematic diagram of the lens group of Embodiment 1 of the optical imaging lens of the present invention;

[0026] Figures 2a to 2c Axial chromatic aberration curve, distortion curve, and lateral chromatic aberration curve of Embodiment 1 of the optical imaging lens of the present invention respectively;

[0027] Figure 3 Schematic diagram of the lens group of Embodiment 2 of the optical imaging lens of the present invention;

[0028] Figures 4a to 4c Axial chromatic aberration curve, distortion curve, and lateral chromatic aberration curve of Embodiment 2 of the optical imaging lens of the present invention respectively;

[0029] Figure 5 Schematic diagram of the lens group of Embodiment 3 of the optical imaging lens of the present invention;

[0030] Figures 6a to 6c Axial chromatic aberration curve, distortion curve, and lateral chromatic aberration curve of Embodiment 3 of the optical imaging lens of the present invention respectively;

[0031] Figure 7 Schematic diagram of the lens group of Embodiment 4 of the optical imaging lens of the present invention;

[0032] Figures 8a to 8c Axial chromatic aberration curve, distortion curve, and lateral chromatic aberration curve of Embodiment 4 of the optical imaging lens of the present invention respectively. Detailed implementation manners

[0033] 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 of the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts fall within the protection scope of the present invention.

[0034] 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.

[0035] It should also be understood that the terms "comprises", "comprising", "has", "including" and / or "including having", when used in this specification, denote the presence of the stated features, elements and / or components, but do not preclude the presence or addition of one or more other features, elements, components and / or combinations thereof. In addition, when an expression such as "at least one of......" appears after a list of listed features, it modifies the entire listed features, rather than an individual 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.

[0036] In the drawings, for the sake of clarity, the thickness, dimensions and shape of the lens have been slightly exaggerated. Specifically, the spherical or aspherical shapes shown in the drawings are shown by way of example. That is, the spherical or aspherical shapes are not limited to the spherical or aspherical shapes shown in the drawings. The drawings are for illustrative purposes only and are not drawn to scale.

[0037] 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.

[0038] Unless otherwise defined, all terms used herein (including technical and scientific terms) 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 sense unless expressly so defined herein.

[0039] It should be noted that, without conflict, the embodiments and features in the embodiments of the present invention may 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.

[0040] Exemplary Embodiments

[0041] The optical imaging lens according to an 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, wherein each lens is independent of each other, and there is an air gap between each lens on the optical axis.

[0042] In the present exemplary embodiment, the first lens has a negative optical power, with its object side being concave and its image side being concave; the second lens may have a positive or negative optical power; the third lens has a positive optical power; the fourth lens may have a positive or negative optical power, with its object side being concave and its image side being convex; the fifth lens has a negative optical power; the sixth lens has a positive optical power; the seventh lens has a negative optical power, with its object side being concave and its image side being convex. Setting the first lens to have a negative optical power, while the object side is concave and the image side is concave, can converge light to a certain extent, enabling the maximum field of view angle of the optical imaging lens to be greater than 90 degrees, and realizing the wide-angle feature of the optical imaging lens. By reasonably controlling the positive and negative distribution of the optical powers of each component of the system, the low-order aberrations of the system can be effectively balanced, the sensitivity to tolerances can be reduced, and the optical imaging lens can have good imaging quality.

[0043] In the present exemplary embodiment, the conditional formula satisfied by half of the diagonal length ImgH of the effective pixel region on the imaging surface and the effective focal length f of the optical imaging lens is: 1.4 < ImgH / f < 2.8. By constraining the ratio of the effective focal length of the optical imaging lens to half of the diagonal length of the image surface, the field of view size of the system can be effectively controlled. More specifically, ImgH and f satisfy: 2 < ImgH / f < 2.1. For example, 2.05 ≤ ImgH / f ≤ 2.07.

[0044] In the present exemplary embodiment, the conditional formula satisfied by the effective focal length f1 of the first lens and the effective focal length f of the optical imaging lens is: -2.0 < f1 / f < -1.5. Controlling the contribution of the optical power of the first lens to the focal length of the entire system can reduce the deflection angle of light and improve the imaging quality of the system. More specifically, f1 and f satisfy: -1.9 < f1 / f < -1.7. For example, -1.82 ≤ f1 / f ≤ -1.76.

[0045] In the present exemplary embodiment, the conditional formula satisfied by the effective focal length f4 of the fourth lens, the effective focal length f3 of the third lens, and the effective focal length f6 of the sixth lens is: 0.6 < f4 / (f3 + f6) < 1.9. By reasonably controlling the ratio of the effective focal lengths of the third lens, the fourth lens, and the sixth lens, the contribution of them to the aberrations of the entire optical system can be controlled, the off-axis aberrations of the system can be balanced, and the imaging quality of the system can be improved. More specifically, f4, f3, and f6 satisfy: 0.7 < f4 / (f3 + f6) < 1.3. For example, 0.73 ≤ f4 / (f3 + f6) ≤ 1.22.

[0046] In the present exemplary embodiment, the conditional expression satisfied by the effective focal length f5 of the fifth lens and the effective focal length f7 of the seventh lens is: 1.5 < f5 / f7 < 2.3. By constraining the ratio of the optical powers of the fifth lens and the seventh lens within a reasonable range, it is possible to balance the remaining spherical aberration to balance the spherical aberration generated by the front lens group, thereby finely adjusting the spherical aberration of the system and reducing the aberration of the on-axis field of view. More specifically, f5 and f7 satisfy: 1.6 < f5 / f7 < 2.2. For example, 1.69 ≤ f5 / f7 ≤ 2.14.

[0047] In the present exemplary embodiment, the conditional expression satisfied by the radius of curvature R2 of the image side of the first lens and the radius of curvature R1 of the object side of the first lens is: -1.5 < R2 / R1 < -1.0. By constraining the ratio of the radius of curvature of the image side and the radius of curvature of the object side of the first lens, the contribution of the first lens to the astigmatism of the imaging system can be reasonably controlled. More specifically, R2 and R1 satisfy: -1.45 < R2 / R1 < -1.3. For example, -1.40 ≤ R2 / R1 ≤ -1.32.

[0048] In the present exemplary embodiment, the conditional expression satisfied by the on-axis distance TTL from the object side of the first lens to the imaging plane, the radius of curvature R3 of the object side of the second lens, and the radius of curvature R4 of the image side of the second lens is: 1.4 < TTL / (R3 + R4) < 1.7. By constraining the ratio of the on-axis distance from the object side of the first lens to the imaging plane to the radii of curvature of the object and image sides of the second lens, the distortion of the system can be reasonably controlled, enabling the system to have good distortion performance. More specifically, TTL, R3, and R4 satisfy: 1.42 < TTL / (R3 + R4) < 1.6. For example, 1.43 ≤ TTL / (R3 + R4) ≤ 1.55.

[0049] In the present exemplary embodiment, the conditional expression satisfied by the radius of curvature R11 of the object side of the sixth lens, the radius of curvature R12 of the image side of the sixth lens, the radius of curvature R9 of the object side of the fifth lens, and the radius of curvature R10 of the image side of the fifth lens is: 6.5 < (R11 - R12) / (R9 - R10) < 8.2. By controlling the ratio of the difference in the radii of curvature of the object and image sides of the sixth lens to the difference in the radii of curvature of the object and image sides of the fifth lens within a certain range, the deflection angle of the system light rays can be reasonably controlled, effectively reducing the sensitivity of the system. More specifically, R11, R12, R9, and R10 satisfy: 6.9 < (R11 - R12) / (R9 - R10) < 8.1. For example, 6.97 ≤ (R11 - R12) / (R9 - R10) ≤ 8.00.

[0050] In the present exemplary embodiment, the conditional formula satisfied by the central thickness CT6 of the sixth lens on the optical axis and the air gap T12 between the first lens and the second lens on the optical axis is: 1.2 < CT6 / T12 < 1.7. By restricting the ratio of the central thickness of the sixth lens on the optical axis to the air gap between the first lens and the second lens on the optical axis, the field curvature contribution of each field of view of the system is controlled within a reasonable range. More specifically, CT6 and T12 satisfy: 1.4 < CT6 / T12 < 1.6. For example, 1.42 ≤ CT6 / T12 ≤ 1.59.

[0051] In the present exemplary embodiment, the conditional formula satisfied by the maximum effective semi-aperture DT12 of the image side of the first lens, the maximum effective semi-aperture DT31 of the object side of the third lens, and the maximum effective semi-aperture DT32 of the image side of the third lens is: 1.0 < DT12 / (DT31 + DT32) < 1.4. Reasonably controlling the effective semi-apertures of the first lens and the third lens is beneficial, on the one hand, to reducing the front-end size of the lens and achieving the characteristics of being thin and light; on the other hand, it reasonably restricts the range of incident light, eliminates the light with poor edge quality, reduces off-axis aberration, and effectively improves the resolution of the lens. More specifically, DT12, DT31, and DT32 satisfy: 1.1 < DT12 / (DT31 + DT32) < 1.3. For example, 1.17 ≤ DT12 / (DT31 + DT32) ≤ 1.29.

[0052] In the present exemplary embodiment, the conditional formula satisfied by the maximum effective semi-aperture DT71 of the object side of the seventh lens, the maximum effective semi-aperture DT72 of the image side of the seventh lens, and half of the diagonal length ImgH of the effective pixel region on the imaging surface is: 1.2 < (DT71 + DT72) / ImgH < 1.5. By restricting the ratio of the sum of the maximum effective semi-apertures of the two sides of the object side of the seventh lens to half of the diagonal length of the image plane, the field of view of the system can be effectively controlled; at the same time, it can also reasonably restrict the range of incident light, ensure that the refraction angle of the light in the seventh lens is not too large, reduce off-axis aberration, and reduce the sensitivity of the system. More specifically, DT71, DT72, and ImgH satisfy: 1.3 < (DT71 + DT72) / ImgH < 1.4. For example, 1.32 ≤ (DT71 + DT72) / ImgH ≤ 1.35.

[0053] In the present exemplary embodiment, the conditional expressions satisfied by the combined focal length f34 of the third and fourth lenses, the combined focal length f56 of the fifth and sixth lenses, and the combined focal length f67 of the sixth and seventh lenses are: 0.7 < (f34 + f56) / f67 < 1.3. By controlling the ratio of the combined focal length of the third and fourth lenses to the combined focal length of the fifth and sixth lenses and the combined focal length of the sixth and seventh lenses within a certain range, the contribution of these lenses to the aberration of the entire optical system can be reasonably controlled, the off-axis aberration of the system can be balanced, and thus the imaging quality of the system can be improved. More specifically, f34, f56, and f67 satisfy: 0.9 < (f34 + f56) / f67 < 1.2. For example, 0.94 ≤ (f34 + f56) / f67 ≤ 1.11.

[0054] In the present exemplary embodiment, the conditional expression satisfied by the on-axis distance SL from the aperture stop to the imaging surface, 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: 4.0 < SL / (CT3 + CT4) < 5.0. By controlling the ratio of the on-axis distance from the aperture stop to the imaging surface to the sum of the central thicknesses of the third and fourth lenses on the optical axis, the distortion range of the optical imaging lens can be reasonably controlled, and the system can have a small distortion. More specifically, SL, CT3, and CT4 satisfy: 4.5 < SL / (CT3 + CT4) < 4.7. For example, 4.60 ≤ SL / (CT3 + CT4) ≤ 4.69.

[0055] In the present exemplary embodiment, the conditional expression satisfied by the on-axis distance SAG51 between the intersection point 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, the on-axis distance SAG62 between the intersection point 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 on-axis distance SAG71 between the intersection point 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 is: 1.2 < (SAG51 + SAG62) / SAG71 < 1.6. By reasonably controlling the ratio of the sum of the sag heights of the object side surface of the fifth lens and the image side surface of the sixth lens to the sag height of the object side surface of the seventh lens, it is beneficial to ensure the processing, shaping, and assembly of the fifth, sixth, and seventh lenses, so as to obtain good imaging quality. An unreasonable ratio may lead to difficulties in debugging the formed surface profile, obvious deformation after assembly, and thus unable to ensure the imaging quality. More specifically, SAG51, SAG62, and SAG71 satisfy: 1.3 < (SAG51 + SAG62) / SAG71 < 1.5. For example, 1.33 ≤ (SAG51 + SAG62) / SAG71 ≤ 1.45.

[0056] In the present exemplary embodiment, the conditional formula satisfied by the edge thickness ET5 of the fifth lens and the edge thickness ET6 of the sixth lens is: 1.6 < ET5 / ET6 < 2.1. By controlling the ratio of the edge thicknesses of the fifth lens and the sixth lens within a certain range, the field curvature contribution amount on the image side can be made within a reasonable range, further balancing the field curvature amount generated by other lenses. More specifically, ET5 and ET6 satisfy: 1.8 < ET5 / ET6 < 2. For example, 1.86 ≤ ET5 / ET6 ≤ 1.91.

[0057] In the present exemplary embodiment, the conditional formula satisfied by the edge thickness ET7 of the seventh lens and the central thickness CT7 of the seventh lens on the optical axis is: 3.0 < ET7 / CT7 < 3.8. By constraining the ratio of the edge thickness of the seventh lens to the central thickness of the element within a certain range, good processability characteristics of the optical element can be ensured. More specifically, ET7 and CT7 satisfy: 3.1 < ET7 / CT7 < 3.6. For example, 3.15 ≤ ET7 / CT7 ≤ 3.56.

[0058] In the present 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.

[0059] 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 on-axis 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.

[0060] 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 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 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 improving astigmatism aberration. After using an aspherical lens, it is possible to eliminate as much aberration as possible 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.

[0061] 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 embodiments, the optical imaging lens is not limited to including seven lenses, and if necessary, the optical imaging lens can also include other numbers of lenses.

[0062] The following further describes specific embodiments of the optical imaging lens applicable to the above embodiments with reference to the accompanying drawings. Specific Embodiment 1

[0064] Figure 1 FIG. 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 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.

[0065] 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 positive 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 concave, and its image side surface S14 is convex. 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.

[0066] 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).

[0067] Surface number Surface type Radius of curvature Thickness / distance Focal length Refractive index Dispersion coefficient Conic coefficient OBJ Spherical surface Infinity Infinity S1 Aspherical surface -3.2229 0.3661 -3.31 1.54 56.1 0.0000 S2 Aspherical surface 4.2675 0.8520 0.0000 S3 Aspherical surface 2.2286 0.3304 202.98 1.62 25.9 0.0000 S4 Aspherical surface 2.1401 0.2896 0.0000 STO Spherical surface Infinity 0.0162 S5 Aspherical surface 7.6335 0.4153 2.69 1.54 56.1 0.0000 S6 Aspherical surface -1.7865 0.0369 0.0000 S7 Aspherical surface -7.1898 0.5839 4.78 1.54 56.1 0.0000 S8 Aspherical surface -1.9697 0.3919 0.0000 S9 Aspherical surface -0.8385 0.3000 -4.67 1.64 23.5 -1.0000 S10 Aspherical surface -1.3255 0.0300 0.0000 S11 Aspherical surface 2.1155 1.2931 1.88 1.54 56.1 0.0000 S12 Aspherical surface -1.5595 0.3675 -1.0000 S13 Aspherical surface -0.7810 0.3000 -2.33 1.67 19.2 -1.0000 S14 Aspherical surface -1.7888 0.1772 -1.0000 S15 Spherical surface Infinity 0.2100 1.52 64.2 S16 Spherical surface Infinity 0.5400 S17 Spherical surface Infinity

[0068] Table 1

[0069] As shown in Table 2, in Embodiment 1, the total effective focal length f of the optical imaging lens is 1.87 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 6.50 mm, half of the diagonal length of the effective pixel region on the imaging surface S17 is ImgH = 3.87 mm, and the maximum field of view angle FOV of the optical imaging system is 126.0°.

[0070]

[0071]

[0072] Table 2

[0073] The optical imaging lens in Embodiment 1 satisfies:

[0074] ImgH / f = 2.07, where ImgH is half of the diagonal length of the effective pixel area on the imaging surface, and f is the effective focal length of the optical imaging lens;

[0075] f1 / f = -1.77, where f1 is the effective focal length of the first lens, and f is the effective focal length of the optical imaging lens;

[0076] f4 / (f3 + f6) = 1.05, where f4 is the effective focal length of the fourth lens, f3 is the effective focal length of the third lens, and f6 is the effective focal length of the sixth lens;

[0077] f5 / f7 = 2.01, where f5 is the effective focal length of the fifth lens, and f7 is the effective focal length of the seventh lens;

[0078] R2 / R1 = -1.32, 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;

[0079] TTL / (R3 + R4) = 1.49, where TTL is the on-axis distance from the object side of the first lens to the imaging surface, R3 is the radius of curvature of the object side of the second lens, and R4 is the radius of curvature of the image side of the second lens;

[0080] (R11 - R12) / (R9 - R10) = 7.55, where R11 is the radius of curvature of the object side of the sixth lens, R12 is the radius of curvature of the image side of the sixth lens, R9 is the radius of curvature of the object side of the fifth lens, and R10 is the radius of curvature of the image side of the fifth lens;

[0081] CT6 / T12 = 1.52, where CT6 is the central thickness of the sixth lens on the optical axis, and T12 is the air gap between the first lens and the second lens on the optical axis;

[0082] DT12 / (DT31 + DT32) = 1.24, where DT12 is the maximum effective semi-aperture of the image side of the first lens, DT31 is the maximum effective semi-aperture of the object side of the third lens, and DT32 is the maximum effective semi-aperture of the image side of the third lens;

[0083] (DT71 + DT72) / ImgH = 1.35, where DT71 is the maximum effective semi-aperture of the object side of the seventh lens, DT72 is the maximum effective semi-aperture of the image side of the seventh lens, and ImgH is half of the diagonal length of the effective pixel area on the imaging surface;

[0084] (f34 + f56) / f67 = 0.99, where f34 is the combined focal length of the third and fourth lenses, f56 is the combined focal length of the fifth and sixth lenses, and f67 is the combined focal length of the sixth and seventh lenses;

[0085] SL / (CT3 + CT4) = 4.67, where SL is the on-axis distance from the aperture stop to the imaging surface, CT3 is the central thickness of the third lens on the optical axis, and CT4 is the central thickness of the fourth lens on the optical axis;

[0086] (SAG51 + SAG62) / SAG71 = 1.40, where SAG51 is the on-axis distance from the intersection of the object side of the fifth lens and the optical axis to the vertex of the effective radius of the object side of the fifth lens, SAG62 is the on-axis distance from the intersection of the image side of the sixth lens and the optical axis to the vertex of the effective radius of the image side of the sixth lens, and SAG71 is the on-axis distance from the intersection of the object side of the seventh lens and the optical axis to the vertex of the effective radius of the object side of the seventh lens;

[0087] ET5 / ET6 = 1.86, where ET5 is the edge thickness of the fifth lens and ET6 is the edge thickness of the sixth lens;

[0088] ET7 / CT7 = 3.28, where ET7 is the edge thickness of the seventh lens and CT7 is the central thickness of the seventh lens on the optical axis.

[0089] 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:

[0090]

[0091] where x is the sagitta, the distance from the vertex of the aspherical surface at a position with a height of h along the optical axis; 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 coefficient; and Ai is the correction coefficient of the i-th order of the aspherical surface.

[0092] 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 term coefficients A4, A6, A8, A 10 、A12 , A 14 , A 16 , A 18 , A 20 , A 22 , A 24 , A 26 , A 28 and A 30 .

[0093]

[0094]

[0095] Table 3

[0096] Figure 2a shows the axial chromatic aberration curve of the optical imaging lens of Example 1, which represents the deviation of the convergence points of light rays of different wavelengths after passing through the lens. Figure 2b shows the distortion curve of the optical imaging lens of Example 1, which represents the distortion magnitude values corresponding to different image heights. Figure 2c shows the lateral chromatic aberration curve of the optical imaging lens of Example 1, which represents the deviation of different image heights on the imaging plane after the light rays pass through the lens. According to Figures 2a to 2c as shown, the optical imaging lens given in Example 1 can achieve good imaging quality. Specific Example 2

[0098] Figure 3 is a schematic structural diagram of the lens group of the optical imaging lens of Embodiment 2 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.

[0099] 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 negative 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 positive 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 concave, and its image side surface S14 is convex. 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.

[0100] As shown in Table 4, it is the basic parameter table of the optical imaging lens in Embodiment 2, where the units of the radius of curvature, thickness, and focal length are all millimeters (mm).

[0101]

[0102]

[0103] Table 4

[0104] As shown in Table 5, in Embodiment 2, the total effective focal length f of the optical imaging lens is 1.87 mm, the distance TTL on the optical axis from the object side S1 of the first lens E1 to the imaging surface S17 is 6.50 mm, half of the diagonal length of the effective pixel region on the imaging surface S17 is ImgH = 3.84 mm, and the maximum field of view angle FOV of the optical imaging system is 126.0°. The parameters of each relationship are as explained in the first embodiment, and the values of each relationship are listed in the following table.

[0105]

[0106] Table 5

[0107] In Embodiment 2, the object side and the image side 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 、A 16 、A 18 、A 20 、A 22 、A 24 、A 26 、A 28 and A 30 .

[0108]

[0109]

[0110] Table 6

[0111] Figure 4a shows the axial chromatic aberration curve of the optical imaging lens in Embodiment 2, which represents the deviation of the convergence points of light rays with different wavelengths after passing through the lens. Figure 4b shows the distortion curve of the optical imaging lens in Embodiment 2, which represents the distortion magnitude values corresponding to different image heights. Figure 4c shows the lateral chromatic aberration curve of the optical imaging lens in Embodiment 2, which represents the deviation of different image heights on the imaging surface after the light rays pass through the lens. According to Figures 4a to 4cAs can be seen, the optical imaging lens given in Embodiment 2 can achieve good imaging quality. Specific Embodiment 3

[0113] Figure 5 As shown in the figure, it 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 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.

[0114] 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 positive 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 concave, and its image side surface S14 is convex. 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.

[0115] 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).

[0116] Surface number Surface type Radius of curvature Thickness / distance Focal length Refractive index Dispersion coefficient Conic coefficient OBJ Spherical surface Infinity Infinity S1 Aspherical surface -3.1363 0.3553 -3.36 1.53 55.7 0.0000 S2 Aspherical surface 4.3965 0.8803 0.0000 S3 Aspherical surface 2.2167 0.3085 98.08 1.62 25.9 0.0000 S4 Aspherical surface 2.1782 0.2778 0.0000 STO Spherical surface Infinity 0.0191 S5 Aspherical surface 10.6729 0.4168 2.62 1.54 56.1 0.0000 S6 Aspherical surface -1.6268 0.0300 0.0000 S7 Aspherical surface -5.5194 0.5816 5.24 1.54 56.1 0.0000 S8 Aspherical surface -1.9534 0.4084 0.0000 S9 Aspherical surface -0.8132 0.3000 -4.53 1.64 23.5 -1.0000 S10 Aspherical surface -1.2910 0.0300 -1.0000 S11 Aspherical surface 2.0297 1.2974 1.89 1.54 56.1 0.0000 S12 Aspherical surface -1.6286 0.3622 -1.0000 S13 Aspherical surface -0.7943 0.3000 -2.43 1.67 19.2 -1.0000 S14 Aspherical surface -1.7660 0.1826 -1.0000 S15 Spherical surface Infinity 0.2100 1.52 64.2 S16 Spherical surface Infinity 0.5400 S17 Spherical surface Infinity

[0117] Table 7

[0118] As shown in Table 8, in Embodiment 3, the total effective focal length f of the optical imaging lens is 1.87 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 6.50 mm, half of the diagonal length of the effective pixel area on the imaging surface S17 is ImgH = 3.85 mm, and the maximum field of view angle FOV of the optical imaging system is 126.0°. The parameters of each relationship are as explained in the first embodiment, and the values of each relationship are listed in the following table.

[0119] <0,

[0120] Table 8

[0121] 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 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 .

[0122] Surface number A4 A6 A8 A10 A12 A14 A16 S1 4.3387E-01 -6.1359E-01 8.0945E-01 -8.7506E-01 7.3732E-01 -4.7444E-01 2.3099E-01 S2 4.6504E-01 -5.9878E-01 6.7264E-01 -5.6274E-01 2.9119E-01 -8.6427E-02 1.3388E-02 S3 -8.3933E-02 -1.3013E-01 1.0350E-01 2.4126E-01 -1.4457E+00 3.9474E+00 -5.5022E+00 S4 3.8255E-02 3.4968E-02 -4.3652E-01 6.6732E+00 -3.5098E+01 1.0326E+02 -1.4743E+02 S5 1.7085E-02 -1.5864E+00 3.0715E+01 -3.4404E+02 2.3417E+03 -9.8699E+03 2.5129E+04 S6 2.7802E-01 -1.6559E+00 5.2434E+00 -6.1442E+00 -2.9843E+01 1.6281E+02 -3.5277E+02 S7 3.0512E-01 -2.0010E+00 8.7977E+00 -3.1665E+01 8.3605E+01 -1.5417E+02 1.8713E+02 S8 -8.4698E-02 -3.6102E-01 8.9466E-01 -2.5212E+00 3.0675E-01 2.6247E+01 -1.0032E+02 S9 7.8161E-01 -1.3088E+00 -2.5750E+00 2.7204E+01 -1.0634E+02 2.5870E+02 -4.2417E+02 S10 4.7873E-01 -6.4057E-01 1.0940E-01 2.6321E+00 -6.8921E+00 9.1792E+00 -7.5537E+00 S11 -1.9494E-01 -1.3548E-01 9.0615E-01 -2.2821E+00 3.7018E+00 -4.1188E+00 3.2326E+00 S12 3.8913E-02 1.5356E-01 -6.5661E-01 1.2413E+00 -1.6226E+00 1.5713E+00 -1.1107E+00 S13 1.2324E+00 -2.5398E+00 3.8991E+00 -4.7306E+00 4.4422E+00 -3.1065E+00 1.5877E+00 S14 9.2052E-01 -1.5834E+00 1.7754E+00 -1.4018E+00 8.0571E-01 -3.4103E-01 1.0659E-01 Surface number A18 A20 A22 A24 A26 A28 A30 S1 -8.4494E-02 2.2989E-02 -4.5712E-03 6.4414E-04 -6.0850E-05 3.4536E-06 -8.8968E-08 S2 -8.2426E-04 -1.3017E-06 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 S3 3.6927E+00 -9.3367E-01 -1.2313E-02 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 S4 5.8833E+01 3.6497E+01 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 S5 -3.5376E+04 2.1122E+04 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 S6 3.8533E+02 -1.7595E+02 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 S7 -1.3167E+02 4.0029E+01 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 S8 1.9059E+02 -2.0495E+02 1.1892E+02 -2.8955E+01 0.0000E+00 0.0000E+00 0.0000E+00 S9 4.6926E+02 -3.3438E+02 1.3782E+02 -2.4863E+01 0.0000E+00 0.0000E+00 0.0000E+00 S10 4.0194E+00 -1.3619E+00 2.6975E-01 -2.3935E-02 0.0000E+00 0.0000E+00 0.0000E+00 S11 -1.8187E+00 7.3693E-01 -2.1324E-01 4.2975E-02 -5.7265E-03 4.5315E-04 -1.6109E-05 S12 5.6522E-01 -2.0552E-01 5.2830E-02 -9.3756E-03 1.0932E-03 -7.5374E-05 2.3288E-06 S13 -5.8934E-01 1.5796E-01 -3.0168E-02 3.9943E-03 -3.4771E-04 1.7863E-05 -4.0955E-07 S14 -2.4552E-02 4.1382E-03 -5.0258E-04 4.2721E-05 -2.4085E-06 8.0812E-08 -1.2206E-09

[0123] Table 9

[0124] Figure 6a shows the axial chromatic aberration curve of the optical imaging lens of Embodiment 3, which represents the deviation of the convergence points of light rays of different wavelengths after passing through the lens. Figure 6b shows the distortion curve of the optical imaging lens of Embodiment 3, which represents the distortion magnitude values corresponding to different image heights. Figure 6c shows the lateral chromatic aberration curve of the optical imaging lens of Embodiment 3, which represents the deviation of different image heights on the imaging plane after the light rays pass through the lens. According to Figures 6a to 6c shown, the optical imaging lens given in Embodiment 3 can achieve good imaging quality. Specific Embodiment 4

[0126] Figure 7 This is a schematic structural diagram of the 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 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.

[0127] The first lens E1 has a negative optical power, its object side S1 is concave, and its image side S2 is concave. 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 positive 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 concave, and its image side S14 is convex. 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.

[0128] As shown in Table 10, it is the basic parameter table of the optical imaging lens in Embodiment 4, where the units of the radius of curvature, thickness, and focal length are all millimeters (mm).

[0129] Surface number Surface type Radius of curvature Thickness / distance Focal length Refractive index Dispersion coefficient Conic coefficient OBJ Spherical surface Infinity Infinity S1 Aspherical surface -3.1180 0.3342 -3.29 1.53 55.7 0.0000 S2 Aspherical surface 4.2225 0.8412 0.0000 S3 Aspherical surface 2.2576 0.3162 54.91 1.62 25.9 0.0000 S4 Aspherical surface 2.2886 0.2784 0.0000 STO Spherical surface Infinity 0.0149 S5 Aspherical surface 12.4452 0.3962 3.28 1.57 37.3 0.0000 S6 Aspherical surface -2.1771 0.0300 0.0000 S7 Aspherical surface -28.2179 0.6327 3.75 1.54 56.1 0.0000 S8 Aspherical surface -1.9260 0.3790 0.0000 S9 Aspherical surface -0.7954 0.3000 -4.13 1.64 23.3 -1.0000 S10 Aspherical surface -1.3032 0.0300 0.0000 S11 Aspherical surface 2.0274 1.3340 1.83 1.54 56.1 0.0000 S12 Aspherical surface -1.5108 0.3673 -1.0234 S13 Aspherical surface -0.7765 0.3000 -2.44 1.67 19.2 -1.0000 S14 Aspherical surface -1.6932 0.1958 -1.0000 S15 Spherical surface Infinity 0.2100 1.52 64.2 S16 Spherical surface Infinity 0.5400 S17 Spherical surface Infinity

[0130] Table 10

[0131] As shown in Table 11, in Embodiment 4, the total effective focal length f of the optical imaging lens is 1.87 mm, the distance TTL on the optical axis from the object side S1 of the first lens E1 to the imaging surface S17 is 6.50 mm, half of the diagonal length of the effective pixel area on the imaging surface S17 is ImgH = 3.86 mm, and the maximum field of view angle FOV of the optical imaging system is 126.0°. The parameters of each relationship are as explained in the first embodiment, and the values of each relationship are listed in the following table.

[0132]

[0133]

[0134] Table 11

[0135] 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 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 mirror surfaces S1 - S14 in Embodiment 4.

[0136] Surface number A4 A6 A8 A10 A12 A14 A16 S1 4.6283E-01 -6.9205E-01 9.5871E-01 -1.0879E+00 9.6473E-01 -6.5552E-01 3.3810E-01 S2 4.9482E-01 -6.7854E-01 8.0633E-01 -7.0754E-01 3.8943E-01 -1.2839E-01 2.4539E-02 S3 -7.7711E-02 -1.1533E-01 3.8109E-02 4.9481E-01 -2.2323E+00 5.2661E+00 -6.5999E+00 S4 5.4475E-02 -9.7939E-02 1.4568E+00 -9.4032E+00 4.8202E+01 -1.7019E+02 3.9894E+02 S5 4.9385E-02 -1.2022E+00 2.3393E+01 -2.6111E+02 1.7807E+03 -7.5490E+03 1.9376E+04 S6 2.7142E-01 -1.4804E+00 4.5801E+00 -6.8930E+00 -1.1132E+01 8.1011E+01 -1.7512E+02 S7 3.1374E-01 -1.8301E+00 7.5467E+00 -2.5951E+01 6.6450E+01 -1.2007E+02 1.4347E+02 S8 -5.4703E-02 -5.1602E-01 2.3346E+00 -1.1425E+01 3.7986E+01 -8.2769E+01 1.1388E+02 S9 7.9453E-01 -1.4664E+00 -2.8219E+00 3.2980E+01 -1.3572E+02 3.4446E+02 -5.8534E+02 S10 5.5782E-01 -1.2635E+00 4.8844E+00 -1.7844E+01 4.7756E+01 -8.4687E+01 9.8071E+01 S11 -2.0658E-01 -1.4023E-01 1.0749E+00 -2.9971E+00 5.3821E+00 -6.6372E+00 5.7835E+00 S12 4.5240E-02 1.7285E-01 -7.7534E-01 1.6539E+00 -2.5312E+00 2.8593E+00 -2.3189E+00 S13 1.2939E+00 -2.7095E+00 4.3418E+00 -5.6927E+00 5.8555E+00 -4.4790E+00 2.4942E+00 S14 9.7120E-01 -1.6259E+00 1.7535E+00 -1.3320E+00 7.4142E-01 -3.0647E-01 9.4219E-02 Surface number A18 A20 A22 A24 A26 A28 A30 S1 -1.3139E-01 3.8066E-02 -8.0762E-03 1.2162E-03 -1.2296E-04 7.4773E-06 -2.0657E-07 S2 -2.5114E-03 1.0753E-04 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 S3 4.0945E+00 -9.6548E-01 -1.7288E-02 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 S4 -5.4416E+02 3.1679E+02 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 S5 -2.7531E+04 1.6595E+04 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 S6 1.8484E+02 -8.2422E+01 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 S7 -9.9530E+01 2.9827E+01 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 S8 -8.9751E+01 2.8676E+01 6.9424E+00 -5.5059E+00 0.0000E+00 0.0000E+00 0.0000E+00 S9 6.6644E+02 -4.8577E+02 2.0399E+02 -3.7428E+01 0.0000E+00 0.0000E+00 0.0000E+00 S10 -7.3437E+01 3.4307E+01 -9.0990E+00 1.0472E+00 0.0000E+00 0.0000E+00 0.0000E+00 S11 -3.6179E+00 1.6318E+00 -5.2637E-01 1.1848E-01 -1.7682E-02 1.5730E-03 -6.3159E-05 S12 1.3334E+00 -5.4113E-01 1.5354E-01 -2.9761E-02 3.7517E-03 -2.7700E-04 9.0826E-06 S13 -1.0069E+00 2.9368E-01 -6.1205E-02 8.8825E-03 -8.5239E-04 4.8602E-05 -1.2463E-06 S14 -2.1461E-02 3.5903E-03 -4.3391E-04 3.6775E-05 -2.0701E-06 6.9431E-08 -1.0493E-09

[0137] Table 12

[0138] Figure 8a shows the axial chromatic aberration curve of the optical imaging lens of Embodiment 4, which represents the deviation of the focusing points of light rays with different wavelengths after passing through the lens. Figure 8b shows the distortion curve of the optical imaging lens of Embodiment 4, which represents the distortion magnitude values corresponding to different image heights. Figure 8c shows the lateral 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 8c as can be seen, the optical imaging lens given in Embodiment 4 can achieve good imaging quality.

[0139] 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 of the optical imaging lens is seven, and 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, whose object side is concave and image side is concave; A second lens with a positive or negative optical power, whose object side is convex and image side is concave; A third lens with a positive optical power, whose object side is convex and image side is convex; A fourth lens with a positive optical power, whose object side is concave and image side is convex; A fifth lens with a negative optical power, whose object side is concave and image side is convex; A sixth lens with a positive optical power, whose object side is convex and image side is convex; A seventh lens with a negative optical power, whose object side is concave and image side is convex; Wherein, the effective focal length f1 of the first lens and the effective focal length f of the optical imaging lens satisfy: -1.82 ≤ f1 / f ≤ -1.

76.

2. The optical imaging lens according to claim 1, characterized in that: Half of the diagonal length ImgH of the effective pixel region on the imaging surface and the effective focal length f of the optical imaging lens satisfy: 2.05 ≤ ImgH / f ≤ 2.

07.

3. The optical imaging lens according to claim 1, wherein: The effective focal length f4 of the fourth lens, the effective focal length f3 of the third lens, and the effective focal length f6 of the sixth lens satisfy: 0.73 ≤ f4 / (f3 + f6) ≤ 1.

22.

4. The optical imaging lens according to claim 1, wherein: The effective focal length f5 of the fifth lens and the effective focal length f7 of the seventh lens satisfy: 1.69 ≤ f5 / f7 ≤ 2.

14.

5. The optical imaging lens according to claim 1, wherein: The curvature radius R2 of the image side of the first lens and the curvature radius R1 of the object side of the first lens satisfy: -1.4 ≤ R2 / R1 ≤ -1.

32.

6. The optical imaging lens according to claim 1, wherein: The on-axis distance TTL from the object side of the first lens to the imaging surface, the curvature radius R3 of the object side of the second lens, and the curvature radius R4 of the image side of the second lens satisfy: 1.4 < TTL / (R3 + R4) ≤ 1.

55.

7. The optical imaging lens according to claim 1, wherein: The curvature radius R11 of the object side of the sixth lens, the curvature radius R12 of the image side of the sixth lens, the curvature radius R9 of the object side of the fifth lens, and the curvature radius R10 of the image side of the fifth lens satisfy: 6.97 ≤ (R11 - R12) / (R9 - R10) ≤ 8.

00.

8. The optical imaging lens according to claim 1, wherein: The central thickness CT6 of the sixth lens on the optical axis and the air gap T12 between the first lens and the second lens on the optical axis satisfy: 1.42 ≤ CT6 / T12 ≤ 1.

59.

9. The optical imaging lens according to claim 1, wherein: The maximum effective semi-aperture DT12 of the image side of the first lens, the maximum effective semi-aperture DT31 of the object side of the third lens, and the maximum effective semi-aperture DT32 of the image side of the third lens satisfy: 1.17 ≤ DT12 / (DT31 + DT32) ≤ 1.

29.

10. The optical imaging lens according to claim 1, wherein: The maximum effective semi-aperture DT71 of the object side of the seventh lens, the maximum effective semi-aperture DT72 of the image side of the seventh lens, and half of the diagonal length ImgH of the effective pixel region on the imaging surface satisfy: 1.32 ≤ (DT71 + DT72) / ImgH ≤ 1.

35.

11. The optical imaging lens according to claim 1, wherein: The combined focal length f34 of the third and fourth lenses, the combined focal length f56 of the fifth and sixth lenses, and the combined focal length f67 of the sixth and seventh lenses satisfy: 0.94 ≤ (f34 + f56) / f67 ≤ 1.

11.

12. The optical imaging lens according to claim 1, wherein: The on-axis distance SL from the aperture stop to the imaging surface, 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 satisfy: 4.6 ≤ SL / (CT3 + CT4) ≤ 4.

69.

13. The optical imaging lens according to claim 1, wherein: The on-axis 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, the on-axis 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 on-axis 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 satisfy: 1.33 ≤ (SAG51 + SAG62) / SAG71 ≤ 1.

45.

14. The optical imaging lens according to claim 1, wherein: The edge thickness ET5 of the fifth lens and the edge thickness ET6 of the sixth lens satisfy: 1.86 ≤ ET5 / ET6 ≤ 1.

91.

15. The optical imaging lens according to claim 1, wherein: The edge thickness ET7 of the seventh lens and the central thickness CT7 of the seventh lens on the optical axis satisfy: 3.15 ≤ ET7 / CT7 ≤ 3.56.

Images