Optical imaging lens

Abstract

The utility model discloses an optical imaging lens. The optical imaging lens sequentially comprises a first lens group, a reflector, a second lens group and a third lens group from an object side to an image side along an optical axis, the first lens group includes: a first lens having a positive refractive power; the second lens group comprises a second lens with positive focal power, a third lens with negative focal power, a fourth lens with positive focal power and a fifth lens with positive focal power; the third lens group comprises a sixth lens with negative focal power and a seventh lens with negative focal power; the optical imaging lens meets the following conditions: 46.0 < f1 / CT1 + f2 / CT2 < 48.5 and 2.0 < T67 / CT6 < 2.5, f1 is the effective focal length of the first lens, CT1 is the center thickness of the first lens on the optical axis, f2 is the effective focal length of the second lens, CT2 is the center thickness of the second lens on the optical axis, T67 is the air gap between the sixth lens and the seventh lens on the optical axis, and CT6 is the center thickness of the sixth lens on the optical axis.

Description

Technical Field

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

[0002] With the popularity and development of smart phones, mobile phone photography has become one of the indispensable functions in people's daily lives. In order to meet users' higher requirements for photo effects, major mobile phone manufacturers are constantly improving their imaging systems and launching various innovative technologies and solutions. Among them, the periscope telephoto lens is the one that has received the most attention in recent years.

[0003] The periscope telephoto lens uses a reflector or prism to bend the originally straight light path, thereby converting the thickness of the lens into length and achieving a longer focal length. This allows the phone to have a more powerful optical zoom capability without increasing the thickness of the phone. However, due to multiple refractions inside the periscope telephoto lens, which affects the amount of light intake and clarity, the existing periscope telephoto lens has a poorer image quality than conventional telephoto lenses. How to improve the image quality of the periscope telephoto lens has become a difficult problem. Utility Model Content

[0004] In a first aspect, the present application provides an optical imaging lens, which includes, in order from the object side to the image side along the optical axis: a first lens group, a reflector, a second lens group and a third lens group; the first lens group includes: a first lens with positive focal power; the second lens group includes: a second lens with positive focal power, a third lens with negative focal power, a fourth lens with positive focal power and a fifth lens with positive focal power; the third lens group includes: a sixth lens with negative focal power and a seventh lens with negative focal power; the optical imaging lens satisfies: 46.0<f1 / CT1+f2 / CT2<48.5 and 2.0<T67 / CT6<2.5, wherein f1 is the effective focal length of the first lens, CT1 is the center thickness of the first lens on the optical axis, f2 is the effective focal length of the second lens, CT2 is the center thickness of the second lens on the optical axis, T67 is the air interval between the sixth lens and the seventh lens on the optical axis, and CT6 is the center thickness of the sixth lens on the optical axis.

[0005] In one embodiment, the optical imaging lens satisfies: 5.5<f1 / R1+f1 / R2<6.0, wherein f1 is the effective focal length of the first lens, R1 is the curvature radius of the object side surface of the first lens, and R2 is the curvature radius of the image side surface of the first lens.

[0006] In one embodiment, the optical imaging lens satisfies: 6.5<(f5+f6) / f7<11.5, wherein f5 is the effective focal length of the fifth lens, f6 is the effective focal length of the sixth lens, and f7 is the effective focal length of the seventh lens.

[0007] In one embodiment, the optical imaging lens satisfies: 4.0<R2×N1 / (R3×N2)<5.0, wherein R2 is the curvature radius of the image side surface of the first lens, R3 is the curvature radius of the object side surface of the second lens, N1 is the refractive index of the first lens, and N2 is the refractive index of the second lens.

[0008] In one embodiment, the optical imaging lens satisfies: 25.5<R5 / CT3+R5 / f3<50.5, wherein R5 is the radius of curvature of the object side surface of the third lens, CT3 is the center thickness of the third lens on the optical axis, and f3 is the effective focal length of the third lens.

[0009] In one embodiment, the optical imaging lens satisfies: 7.5<f4×N4 / R7<14.5, wherein f4 is the effective focal length of the fourth lens, N4 is the refractive index of the fourth lens, and R7 is the radius of curvature of the object side surface of the fourth lens.

[0010] In one embodiment, the optical imaging lens satisfies: 10.5<f5×V5 / |R9|<21.5, wherein f5 is the effective focal length of the fifth lens, V5 is the Abbe number of the fifth lens, and R9 is the radius of curvature of the object side of the fifth lens.

[0011] In one embodiment, the optical imaging lens satisfies: 13.0<f6 / (R11+R12)<20.5, wherein f6 is the effective focal length of the sixth lens, R11 is the curvature radius of the object side surface of the sixth lens, and R12 is the curvature radius of the image side surface of the sixth lens.

[0012] In one embodiment, the optical imaging lens satisfies: -31.0<f7×V7 / R13≤-30.0, wherein f7 is the effective focal length of the seventh lens, V7 is the Abbe number of the seventh lens, and R13 is the radius of curvature of the object side of the seventh lens.

[0013] In one embodiment, the optical imaging lens satisfies: 0.8<f3×N3 / R4<1.0, wherein f3 is the effective focal length of the third lens, N3 is the refractive index of the third lens, and R4 is the radius of curvature of the image side surface of the second lens.

[0014] In one embodiment, the optical imaging lens satisfies: 0.5<T67 / (CT3+T34+T45)<1.0, wherein T67 is the air spacing between the sixth lens and the seventh lens on the optical axis, CT3 is the center thickness of the third lens on the optical axis, T34 is the air spacing between the third lens and the fourth lens on the optical axis, and T45 is the air spacing between the fourth lens and the fifth lens on the optical axis.

[0015] In one embodiment, the optical imaging lens satisfies: -1.0<f1 / f7+f1 / f2<-0.3, wherein f1 is the effective focal length of the first lens, f2 is the effective focal length of the second lens, and f7 is the effective focal length of the seventh lens.

[0016] In one embodiment, the optical imaging lens satisfies: -11.5<f6 / f5<-9.0, wherein f5 is the effective focal length of the fifth lens, and f6 is the effective focal length of the sixth lens.

[0017] In one embodiment, the optical imaging lens satisfies: 2.0<(R10+R11) / (R10-R11)<2.5, wherein R10 is the curvature radius of the image side surface of the fifth lens, and R11 is the curvature radius of the object side surface of the sixth lens.

[0018] In one embodiment, when the object distance changes, the optical imaging lens achieves focusing by overall movement of the second lens group along the optical axis; the optical imaging lens satisfies: 7.5<f2345 / (CT3+CT5)<9.0, f2345 is the combined focal length of the second lens, the third lens, the fourth lens and the fifth lens, CT3 is the center thickness of the third lens on the optical axis, and CT5 is the center thickness of the fifth lens on the optical axis.

[0019] In one embodiment, the optical imaging lens satisfies: -8.0<f67 / (CT6+CT7)<-7.0, wherein f67 is the combined focal length of the sixth lens and the seventh lens, CT6 is the center thickness of the sixth lens on the optical axis, and CT7 is the center thickness of the seventh lens on the optical axis.

[0020] In one embodiment, the optical imaging lens further includes a prism disposed on the image side of the seventh lens.

[0021] In a second aspect, the present application provides an optical imaging lens, which includes, in order from the object side to the image side along the optical axis: a first lens group, a reflector, a second lens group and a third lens group; the first lens group includes: a first lens with positive focal power; the second lens group includes: a second lens with positive focal power, a third lens with negative focal power, a fourth lens with positive focal power and a fifth lens with positive focal power; the third lens group includes: a sixth lens with negative focal power and a seventh lens with negative focal power; when the object distance changes, the optical imaging lens achieves focusing through the overall movement of the second lens group along the optical axis; the optical imaging lens satisfies: 7.5<f2345 / (CT3+CT5)<9.0, f2345 is the combined focal length of the second lens, the third lens, the fourth lens and the fifth lens, CT3 is the center thickness of the third lens on the optical axis, and CT5 is the center thickness of the fifth lens on the optical axis.

[0022] The present application provides an optical imaging lens, which adopts seven lenses and a reflector for long-focus return optical path design, reasonably sets the optical focal length of each lens, and controls the first lens and the second lens to satisfy 46.0<f1 / CT1+f2 / CT2<48.5, which is beneficial to improving the light convergence ability of the first lens and the second lens, adjusting the focusing position of the light, so that the light of the first optical axis segment can be smoothly deflected to the second optical axis segment through the reflector, and can improve the comprehensive system spherical aberration in cooperation with subsequent lenses; at the same time, by controlling the middle thickness of the sixth lens and the interval between the sixth lens and the seventh lens to satisfy 2.0<T67 / CT6<2.5, it is helpful to evenly distribute the lens sizes, ensure assembly stability, and reduce the off-axis aberration of the entire imaging system. The cooperation between the two is beneficial to improving the imaging quality. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Other features, objects and advantages of the present application will become more apparent by reading the detailed description of non-limiting embodiments made with reference to the following drawings:

[0024] Figure 1A and Figure 1B Schematic diagrams of the structure of the optical imaging lens according to Embodiment 1 of the present application when the object distance is infinite and when the object distance is 60 mm are respectively shown;

[0025] FIG. 2A to FIG. 2D The axial chromatic aberration curve, the astigmatism curve, the distortion curve and the magnification chromatic aberration curve of the optical imaging lens according to Example 1 of the present application when the object distance is infinite are respectively shown;

[0026] Figures 2E to 2H The axial chromatic aberration curve, the astigmatism curve, the distortion curve and the magnification chromatic aberration curve of the optical imaging lens according to Example 1 of the present application when the object distance is 60 mm are respectively shown;

[0027] Figure 3 A schematic structural diagram of an optical imaging lens according to Embodiment 2 of the present application when the object distance is infinite is shown;

[0028] FIG. 4A to FIG. 4D The axial chromatic aberration curve, the astigmatism curve, the distortion curve and the magnification chromatic aberration curve of the optical imaging lens according to Example 2 of the present application when the object distance is infinite are respectively shown;

[0029] FIG. 4E to FIG. 4H The axial chromatic aberration curve, the astigmatism curve, the distortion curve and the magnification chromatic aberration curve of the optical imaging lens according to Example 2 of the present application when the object distance is 60 mm are respectively shown;

[0030] Figure 5 A schematic structural diagram of an optical imaging lens according to Embodiment 3 of the present application when the object distance is infinite is shown;

[0031] FIG. 6A to FIG. 6D The axial chromatic aberration curve, the astigmatism curve, the distortion curve and the magnification chromatic aberration curve of the optical imaging lens according to Example 3 of the present application when the object distance is infinite are respectively shown;

[0032] FIG. 6E to FIG. 6H The axial chromatic aberration curve, the astigmatism curve, the distortion curve and the magnification chromatic aberration curve of the optical imaging lens according to Example 3 of the present application when the object distance is 60 mm are respectively shown;

[0033] Figure 7 A schematic structural diagram of an optical imaging lens according to Embodiment 4 of the present application when the object distance is infinite is shown;

[0034] FIG. 8A to FIG. 8D The axial chromatic aberration curve, the astigmatism curve, the distortion curve and the magnification chromatic aberration curve of the optical imaging lens according to Example 4 of the present application when the object distance is infinite are respectively shown;

[0035] FIG. 8E to FIG. 8H The axial chromatic aberration curve, the astigmatism curve, the distortion curve and the magnification chromatic aberration curve of the optical imaging lens according to Example 4 of the present application when the object distance is 60 mm are respectively shown;

[0036] Fig. 9 A schematic structural diagram of an optical imaging lens according to Embodiment 5 of the present application when the object distance is infinite is shown;

[0037] FIG. 10A to FIG. 10D The axial chromatic aberration curve, the astigmatism curve, the distortion curve and the magnification chromatic aberration curve of the optical imaging lens according to Example 5 of the present application when the object distance is infinite are respectively shown;

[0038] FIG. 10E to FIG. 10HThe axial chromatic aberration curve, the astigmatism curve, the distortion curve and the magnification chromatic aberration curve of the optical imaging lens according to Example 5 of the present application when the object distance is 60 mm are respectively shown;

[0039] Fig.11 A schematic diagram of the structure of an optical imaging lens according to the present application is shown; and

[0040] FIG. 12A to FIG. 12C Defocus curves of three optical imaging lenses according to the present application are shown respectively. DETAILED DESCRIPTION

[0041] In order to better understand the present application, a more detailed description will be made of various aspects of the present application with reference to the accompanying drawings. It should be understood that these detailed descriptions are only descriptions of exemplary embodiments of the present application, and are not intended to limit the scope of the present application in any way. Throughout the specification, the same reference numerals refer to the same elements. The expression "and / or" includes any and all combinations of one or more of the associated listed items.

[0042] It should be noted that in this specification, the expressions of first, second, third, etc. are only used to distinguish one feature from another feature, and do not represent any limitation on the features. Therefore, without departing from the teaching of the present application, the first lens discussed below may also be referred to as the second lens or the third lens.

[0043] In the drawings, the thickness, size and shape of the lenses have been slightly exaggerated for ease of explanation. Specifically, the shapes of the spherical or aspherical surfaces shown in the drawings are shown by way of example. That is, the shapes of the spherical or aspherical surfaces are not limited to the shapes of the spherical or aspherical surfaces shown in the drawings. The drawings are only examples and are not drawn strictly to scale.

[0044] In this article, the paraxial region refers to the region near the optical axis. If the lens surface is convex and the position of the convex surface is not defined, it means that the lens surface is convex at least in the paraxial region; if the lens surface is concave and the position of the concave surface is not defined, it means that the lens surface is concave at least in the paraxial region. The surface of each lens close to the object is called the object side of the lens, and the surface of each lens close to the imaging plane is called the image side of the lens.

[0045] It should also be understood that the terms "comprises", "including", "having", "includes" and / or "comprising", when used in this specification, indicate the presence of the stated features, elements and / or components, but do not exclude the presence or addition of one or more other features, elements, components and / or combinations thereof. In addition, when expressions such as "at least one of..." appear after a list of listed features, they modify the entire listed features rather than modifying the individual elements in the list. In addition, when describing embodiments of the present application, "may" is used to mean "one or more embodiments of the present application". And, the term "exemplary" is intended to refer to an example or illustration.

[0046] Unless otherwise defined, all terms (including technical terms and scientific terms) used in this article have the same meaning as those commonly understood by ordinary technicians in the field to which this application belongs. It should also be understood that terms (such as terms defined in commonly used dictionaries) should be interpreted as having the same meaning as their meaning in the context of the relevant technology, and will not be interpreted in an idealized or overly formal sense unless explicitly defined in this article.

[0047] It should be noted that, in the absence of conflict, the embodiments and features in the embodiments of the present application can be combined with each other. The present application will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0048] The optical imaging lens according to the exemplary embodiment of the present application includes: a first lens group, a reflector, a second lens group and a third lens group in order from the object side to the image side along the optical axis; wherein the first lens group includes: a first lens with positive focal length; the second lens group includes: a second lens with positive focal length, a third lens with negative focal length, a fourth lens with positive focal length and a fifth lens with positive focal length; the third lens group includes: a sixth lens with negative focal length and a seventh lens with negative focal length. There is an air gap between any two adjacent lenses from the first lens to the seventh lens.

[0049] The reflector is helpful to realize the function of light path turning of the optical imaging system. Specifically, the light from the object side enters the first lens, then changes the propagation direction after being reflected by the reflector, and enters the second lens, the third lens, the fourth lens, the fifth lens, the sixth lens and the seventh lens in sequence.

[0050] In an exemplary embodiment, an aperture for limiting the light beam may be provided between the reflector and the second lens to further improve the imaging quality of the optical lens. Exemplarily, the aperture may be provided on the object side of the second lens. The aperture may effectively converge the light entering the optical lens, reduce the maximum aperture of the optical lens, and facilitate miniaturization. However, it should be noted that the position of the aperture disclosed herein is only an example and not a limitation; in alternative embodiments, the aperture may also be provided at other positions according to actual needs.

[0051] In an exemplary embodiment, Figure 1A As shown, the optical imaging lens includes, in order from the object side to the image side along the optical axis: a first lens E1, a reflector P1, an aperture STO, a second lens E2, a third lens E3, a fourth lens E4, a fifth lens E5, a sixth lens E6, a seventh lens E7, a prism E8 and a filter E9. The optical axis is a turning optical axis, including a first optical axis segment 1 and a second optical axis segment 2. The first lens E1 and the reflector P1 are located in the first optical axis segment of the turning optical axis, and the second lens E2, the third lens E3, the fourth lens E4, the fifth lens E5, the sixth lens E6, the seventh lens E7, the prism E8 and the filter E9 are located in the second optical axis segment of the turning optical axis. More specifically, the reflective surface of the reflector P1 is located at the connection between the first optical axis segment and the second optical axis segment of the turning optical axis.

[0052] In an exemplary embodiment, the optical imaging lens according to the exemplary embodiment of the present application may further include a prism disposed on the image side of the seventh lens, the prism may have an incident surface, a reflection surface, and an exit surface, and the prism is conducive to achieving the effect of light path turning of the optical imaging lens. In the present application, the shape of the prism is not specifically limited, and the shape of the prism can be designed according to actual needs.

[0053] Fig.11 An optical imaging lens is shown, which includes, from the object side to the image side along the optical axis, a first lens group 1P, a reflector P1, a second lens group 4P, a third lens group 2P, and a prism P2; wherein the first lens group 1P includes 1 lens; the second lens group 4P includes 4 lenses; and the third lens group 2P includes 2 lenses. Light from an object passes through the first lens group 1P to the reflector P1, is reflected by the reflector P1 to the second lens group 4P, and then passes through the second lens group 4P, the third lens group 2P, and the prism P2 in sequence, and then enters the rear photosensitive chip S for processing and imaging.

[0054] In an exemplary embodiment, when the object distance changes, the optical imaging lens achieves focusing by the overall movement of the second lens group along the optical axis.

[0055] In an exemplary embodiment, the optical imaging lens according to the present application may satisfy 46.0<f1 / CT1+f2 / CT2<48.5 and 2.0<T67 / CT6<2.5, wherein f1 is the effective focal length of the first lens, CT1 is the center thickness of the first lens on the optical axis, f2 is the effective focal length of the second lens, CT2 is the center thickness of the second lens on the optical axis, T67 is the air interval between the sixth lens and the seventh lens on the optical axis, and CT6 is the center thickness of the sixth lens on the optical axis. The present application controls the first lens and the second lens to satisfy 46.0<f1 / CT1+f2 / CT2<48.5, which is beneficial to improving the light converging ability of the first lens and the second lens, adjusting the focusing position of the light, so that the light of the first optical axis segment can be smoothly deflected to the second optical axis segment through the reflector, and can improve the comprehensive system spherical aberration in cooperation with subsequent lenses; at the same time, by controlling the middle thickness of the sixth lens and the interval between the sixth lens and the seventh lens to satisfy 2.0<T67 / CT6<2.5, it is helpful to evenly distribute the lens sizes, ensure assembly stability, and reduce the off-axis aberration of the entire imaging system. The cooperation between the two is beneficial to improving the imaging quality.

[0056] The following combination FIG. 12A to FIG. 12C One of the main improvements of the present application over the prior art is described in detail: the optical imaging lens of the present application satisfies 46.0<f1 / CT1+f2 / CT2<48.5 and 2.0<T67 / CT6<2.5, which can improve the spherical aberration of the comprehensive system, ensure assembly stability, and reduce the off-axis aberration of the entire imaging system, thereby improving the imaging quality.

[0057] Fig. 12A The figure shows a defocus curve of an optical imaging lens when f1 / CT1+f2 / CT2=46.09 and T67 / CT6=2.32. Fig. 12B The figure shows a defocus curve of an optical imaging lens when f1 / CT1+f2 / CT2=40.12 and T67 / CT6=1.89. Fig. 12C The figure shows a defocus curve of an optical imaging lens when f1 / CT1+f2 / CT2=51.0 and T67 / CT6=2.78. The horizontal axis of the defocus curve represents the focal shift (mm), and the vertical axis represents the MTF value. It can be understood that the peaks of the defocus characteristic curve are all in the higher value area, and the positions of the defocus curve peaks are relatively concentrated, indicating that the focus of the lens is better.

[0058] according to FIG. 12A to FIG. 12C By comparison, Fig. 12AThe defocus curve peaks of the defocus curves that meet 46.0<f1 / CT1+f2 / CT2<48.5 and 2.0<T67 / CT6<2.5 are relatively concentrated, indicating that the focus of the lens is better, and the peaks of all defocus characteristic curves are in the higher value area. Fig. 12B and Fig. 12C When the values ​​of f1 / CT1+f2 / CT2 and T67 / CT6 are not within the range of this application, the position of the defocus curve peak is relatively scattered, indicating that the focus offset of the lens is large and the imaging quality is poor. In other words, Fig. 12A The defocus curve is significantly better than Fig. 12B and Fig. 12C Defocus curve diagram.

[0059] In an exemplary embodiment, the optical imaging lens according to the present application can satisfy 5.5<f1 / R1+f1 / R2<6.0, where f1 is the effective focal length of the first lens, R1 is the radius of curvature of the object side surface of the first lens, and R2 is the radius of curvature of the image side surface of the first lens. Satisfying 5.5<f1 / R1+f1 / R2<6.0 and reasonably controlling the ratio of the effective focal length of the first lens to the radius of curvature of the object side surface of the first lens and the ratio of the effective focal length of the first lens to the radius of curvature of the image side surface of the first lens can improve the MTF while meeting the anti-shake sensitivity requirements.

[0060] In an exemplary embodiment, the optical imaging lens according to the present application may satisfy: 6.5<(f5+f6) / f7<11.5, where f5 is the effective focal length of the fifth lens, f6 is the effective focal length of the sixth lens, and f7 is the effective focal length of the seventh lens. Satisfying 6.5<(f5+f6) / f7<11.5 and reasonably controlling the ratio of the sum of the effective focal length of the fifth lens and the effective focal length of the sixth lens to the effective focal length of the seventh lens may improve the system performance after the second lens group moves to the macro state.

[0061] In an exemplary embodiment, the optical imaging lens according to the present application may satisfy: 4.0<R2×N1 / (R3×N2)<5.0, where R2 is the radius of curvature of the image side surface of the first lens, R3 is the radius of curvature of the object side surface of the second lens, N1 is the refractive index of the first lens, and N2 is the refractive index of the second lens. Satisfying 4.0<R2×N1 / (R3×N2)<5.0 and constraining this ratio can improve system performance while ensuring the sensitivity of the first lens group and the second lens group.

[0062] In an exemplary embodiment, the optical imaging lens according to the present application may satisfy: 25.5<R5 / CT3+R5 / f3<50.5, wherein R5 is the radius of curvature of the object side surface of the third lens, CT3 is the center thickness of the third lens on the optical axis, and f3 is the effective focal length of the third lens. Satisfying 25.5<R5 / CT3+R5 / f3<50.5, the processability of the third lens may be improved by controlling the sum of the ratio of the radius of curvature of the object side surface of the third lens to the center thickness of the third lens on the optical axis and the ratio of the radius of curvature of the object side surface of the third lens to the effective focal length of the third lens.

[0063] In an exemplary embodiment, the optical imaging lens according to the present application may satisfy: 7.5<f4×N4 / R7<14.5, where f4 is the effective focal length of the fourth lens, N4 is the refractive index of the fourth lens, and R7 is the radius of curvature of the object side of the fourth lens. Satisfying 7.5<f4×N4 / R7<14.5 and reasonably controlling the ratio of the product of the optical power and the refractive index of the fourth lens to the radius of curvature of the object side of the fourth lens can effectively reduce the optical sensitivity of the fourth lens, which is more conducive to mass production.

[0064] In an exemplary embodiment, the optical imaging lens according to the present application may satisfy: 10.5<f5×V5 / |R9|<21.5, wherein f5 is the effective focal length of the fifth lens, V5 is the Abbe number of the fifth lens, and R9 is the radius of curvature of the object side of the fifth lens. Satisfying 10.5<f5×V5 / |R9|<21.5 and reasonably controlling the ratio of the product of the effective focal length of the fifth lens and the Abbe number of the fifth lens to the absolute value of the radius of curvature of the object side of the fifth lens can effectively improve system chromatic aberration and enhance imaging quality.

[0065] In an exemplary embodiment, the optical imaging lens according to the present application may satisfy: 13.0<f6 / (R11+R12)<20.5, wherein f6 is the effective focal length of the sixth lens, R11 is the radius of curvature of the object side surface of the sixth lens, and R12 is the radius of curvature of the image side surface of the sixth lens. Satisfying 13.0<f6 / (R11+R12)<20.5 and reasonably controlling the ratio of the effective focal length of the sixth lens to the sum of the radius of curvature of the object side surface and the image side surface of the sixth lens can effectively reduce the optical sensitivity of the sixth lens and improve the production yield.

[0066] In an exemplary embodiment, the optical imaging lens according to the present application may satisfy: -31.0<f7×V7 / R13≤-30.0, wherein f7 is the effective focal length of the seventh lens, V7 is the Abbe number of the seventh lens, and R13 is the radius of curvature of the object side of the seventh lens. Satisfying -31.0<f7×V7 / R13≤-30.0 and reasonably controlling the ratio of the product of the effective focal length of the seventh lens and the Abbe number of the seventh lens to the radius of curvature of the object side of the seventh lens can effectively improve the system's out-of-field magnification chromatic aberration.

[0067] In an exemplary embodiment, the optical imaging lens according to the present application may satisfy: 0.8<f3×N3 / R4<1.0, wherein f3 is the effective focal length of the third lens, N3 is the refractive index of the third lens, and R4 is the radius of curvature of the image side surface of the second lens. 0.8<f3×N3 / R4<1.0 is satisfied. By reasonably controlling the ratio of the product of the effective focal length of the third lens and the refractive index of the third lens to the radius of curvature of the image side surface of the second lens, the ability of the optical imaging system to correct off-axis aberrations can be improved, so that the system can obtain higher image quality.

[0068] In an exemplary embodiment, the optical imaging lens according to the present application may satisfy: 0.5<T67 / (CT3+T34+T45)<1.0, wherein T67 is the air interval between the sixth lens and the seventh lens on the optical axis, CT3 is the center thickness of the third lens on the optical axis, T34 is the air interval between the third lens and the fourth lens on the optical axis, and T45 is the air interval between the fourth lens and the fifth lens on the optical axis. Satisfying 0.5<T67 / (CT3+T34+T45)<1.0 and reasonably controlling the air interval between the sixth lens and the seventh lens on the optical axis, the center thickness of the third lens on the optical axis, the air interval between the third lens and the fourth lens on the optical axis, and the air interval between the fourth lens and the fifth lens on the optical axis are beneficial to the actual structural assembly process and improve the system stability.

[0069] In an exemplary embodiment, the optical imaging lens according to the present application may satisfy: -1.0<f1 / f7+f1 / f2<-0.3, where f1 is the effective focal length of the first lens, f2 is the effective focal length of the second lens, and f7 is the effective focal length of the seventh lens. Satisfying -1.0<f1 / f7+f1 / f2<-0.3 is conducive to achieving system miniaturization.

[0070] In an exemplary embodiment, the optical imaging lens according to the present application may satisfy: -11.5<f6 / f5<-9.0, where f5 is the effective focal length of the fifth lens and f6 is the effective focal length of the sixth lens. Satisfying -11.5<f6 / f5<-9.0 and reasonably controlling the effective focal length of the fifth lens and the effective focal length of the sixth lens is conducive to adjusting the chief ray angle of the system and improving the imaging quality.

[0071] In an exemplary embodiment, the optical imaging lens according to the present application may satisfy: 2.0<(R10+R11) / (R10-R11)<2.5, wherein R10 is the curvature radius of the image side surface of the fifth lens, and R11 is the curvature radius of the object side surface of the sixth lens. Satisfying 2.0<(R10+R11) / (R10-R11)<2.5 can reduce the size of optical distortion and ensure better imaging quality.

[0072] In an exemplary embodiment, the optical imaging lens according to the present application may satisfy: 7.5<f2345 / (CT3+CT5)<9.0, where f2345 is the combined focal length of the second lens, the third lens, the fourth lens, and the fifth lens, CT3 is the center thickness of the third lens on the optical axis, and CT5 is the center thickness of the fifth lens on the optical axis. Satisfying 7.5<f2345 / (CT3+CT5)<9.0 is conducive to ensuring the movement stroke of the second lens group while satisfying the macro performance.

[0073] In an exemplary embodiment, the optical imaging lens according to the present application may satisfy: -8.0<f67 / (CT6+CT7)<-7.0, wherein f67 is the combined focal length of the sixth lens and the seventh lens, CT6 is the center thickness of the sixth lens on the optical axis, and CT7 is the center thickness of the seventh lens on the optical axis. Satisfying -8.0<f67 / (CT6+CT7)<-7.0 and reasonably controlling the focal length and thickness of the sixth lens and the seventh lens is conducive to ensuring that the third lens group meets the macro performance.

[0074] In an exemplary embodiment, the present application further provides an optical imaging lens, which includes, in order from the object side to the image side along the optical axis: a first lens group, a reflector, a second lens group and a third lens group; the first lens group includes: a first lens with positive optical power; the second lens group includes: a second lens with positive optical power, a third lens with negative optical power, a fourth lens with positive optical power and a fifth lens with positive optical power; the third lens group includes: a sixth lens with negative optical power and a seventh lens with negative optical power; when the object distance changes, the optical imaging lens achieves focusing through the overall movement of the second lens group along the optical axis; the optical imaging lens satisfies: 7.5<f2345 / (CT3+CT5)<9.0, f2345 is the combined focal length of the second lens, the third lens, the fourth lens and the fifth lens, CT3 is the center thickness of the third lens on the optical axis, and CT5 is the center thickness of the fifth lens on the optical axis. Reasonable design of the focal length of the second lens group and the center thickness of the third lens and the fifth lens is conducive to ensuring the movement range of the second lens group while meeting the macro performance

[0075] In the embodiment of the present application, at least one of the mirror surfaces of each lens is an aspherical mirror surface, that is, at least one of the mirror surfaces from the object side of the first lens to the image side of the seventh lens is an aspherical mirror surface. The characteristic of an aspherical lens is that the curvature changes continuously from the center of the lens to the periphery of the lens. Unlike a spherical lens having a constant curvature from the center of the lens to the periphery of the lens, an aspherical lens has a better curvature radius characteristic, and has the advantages of improving distortion aberration and improving astigmatism aberration. After adopting an aspherical lens, the aberration occurring during imaging can be eliminated as much as possible, thereby improving the imaging quality. Optionally, the object side and image side of all lenses from the first lens to the seventh lens are aspherical mirror surfaces.

[0076] In an exemplary embodiment, the optical imaging lens may further include a filter for correcting color deviation and / or a protective glass for protecting a photosensitive element located on the imaging surface.

[0077] The present application proposes an optical imaging lens with a folded optical path design and an autofocus function. The optical imaging lens according to the above-mentioned embodiment of the present application may use multiple lenses, such as the seven lenses mentioned above. By reasonably allocating the optical power, surface shape, center thickness of each lens, and axial spacing between each lens, the low-order aberrations of the optical imaging system can be effectively balanced and controlled, while reducing the sensitivity of its tolerance and maintaining the miniaturization of the optical imaging system. However, those skilled in the art should understand that without departing from the technical solution claimed for protection in the present application, the number of lenses constituting the optical imaging lens can be changed to obtain the various results and advantages described in this specification. For example, although seven lenses are described as an example in the 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.

[0078] Specific embodiments of the optical imaging lens applicable to the above-mentioned embodiments are further described below with reference to the accompanying drawings.

[0079] Example 1

[0080] The following reference Figures 1A to 2H An optical imaging lens according to Embodiment 1 of the present application is described. Figure 1A A schematic structural diagram of the optical imaging lens according to Embodiment 1 of the present application when the object distance is infinite is shown. Figure 1B A schematic structural diagram of the optical imaging lens according to Example 1 of the present application when the object distance is 60 mm is shown.

[0081] like Figure 1A and Figure 1BAs shown, the optical imaging lens includes, in order from the object side to the image side along the optical axis: a first lens E1, a reflector P1, an aperture STO, a second lens E2, a third lens E3, a fourth lens E4, a fifth lens E5, a sixth lens E6, a seventh lens E7, a prism E8 and a filter E9. The optical axis is a turning optical axis, including a first optical axis segment 1 and a second optical axis segment 2. The first lens E1 and the reflector P1 are located in the first optical axis segment of the turning optical axis, and the second lens E2, the third lens E3, the fourth lens E4, the fifth lens E5, the sixth lens E6, the seventh lens E7, the prism E8 and the filter E9 are located in the second optical axis segment of the turning optical axis. More specifically, the reflective surface of the reflector P1 is located at the connection between the first optical axis segment and the second optical axis segment of the turning optical axis. Exemplarily, the aperture STO may be provided on the object side of the second lens E2.

[0082] In this embodiment, combined with Table 1-1 and Figure 1A , Figure 1B It can be seen that the first lens E1 has positive focal power, its object side surface S1 is convex, and the image side surface S2 is concave. The reflector P1 has a reflecting surface S3. The second lens E2 has positive focal power, its object side surface S8 is convex, and the image side surface S9 is concave. The third lens E3 has negative focal power, its object side surface S10 is convex, and the image side surface S11 is concave. The fourth lens E4 has positive focal power, its object side surface S12 is convex, and the image side surface S13 is concave. The fifth lens E5 has positive focal power, its object side surface S14 is convex, and the image side surface S15 is convex. S16 can be an aperture stop or a spacer. The sixth lens E6 has negative focal power, its object side surface S17 is concave, and the image side surface S18 is convex. S19 and S20 can be aperture stops or spacers. The seventh lens E7 has negative focal power, its object side surface S21 is convex, and the image side surface S22 is concave. The prism E8 has an incident surface S23 ( Figure 1A and Figure 1B The optical imaging lens has an imaging surface S28 (not shown), a reflection surface S24 and an emission surface S25, and the filter E9 has an object side surface S26 and an image side surface S27. Figure 1A and Figure 1B (not shown), the light from the object passes through the first lens E1 to the reflector P1 in sequence along the first optical axis segment, is reflected by the reflector P1 to the second optical axis segment, and then passes through the aperture STO, the second lens E2, the third lens E3, the fourth lens E4, the fifth lens E5, the sixth lens E6, the seventh lens E7, the prism E8 and the filter E9 in sequence along the second optical axis segment, and is finally imaged on the imaging surface S28.

[0083] Table 1-1 shows the basic parameters of the optical imaging lens of Example 1, wherein the units of the radius of curvature and thickness / distance are both millimeters (mm).

[0084]

[0085]

[0086] Table 1-1

[0087] In this embodiment, the combined focal length f2345 of the second lens, the third lens, the fourth lens and the fifth lens of the optical imaging lens is 10.86 mm, and the combined focal length f67 of the sixth lens and the seventh lens is -9.53 mm.

[0088] In this embodiment and the following embodiments, the optical imaging lens is a zoom lens, including at least a first state and a second state, wherein the first state corresponds to an object distance of infinity, and the second state corresponds to an object distance of 60 mm. During the shooting process, the first lens group (i.e., the first lens), the reflector, and the third lens group (i.e., the sixth lens and the seventh lens) are fixed. When the object distance (OBJ) changes, the second lens group (i.e., the second lens, the third lens, the fourth lens and the fifth lens) can move as a whole along the optical axis, and the imaging surface also moves accordingly, so that the effective focal length of the optical imaging lens changes with the change of the object distance, thereby realizing the autofocus function of the optical imaging lens.

[0089] Specifically, Table 1-2 shows the values ​​of T1, T2, and T3 when the distance M between the optical imaging lens of Example 1 and the object is infinity and 60 mm, respectively. In this embodiment, when the object distance is switched from infinity to 60 mm, the second lens group as a whole moves closer to the reflector and away from the third lens group, and the change in T1 and T2 is 3.1739 mm-0.9739 mm=2.2 mm, that is, the second lens group moves closer to the reflector by 2.2 mm and away from the third lens group by 2.2 mm; at the same time, the imaging plane adjusts its position accordingly according to the actual shooting situation, for example, T3 changes from 0.0097 mm to 0.0401 mm.

[0090] Table 1-2 also shows the values ​​of the maximum half field of view Semi-FOV, aperture number f / EPD, and effective focal length f of the optical imaging lens at different object distances.

[0091] First State Second State M(mm) Infinity 60 Semi-FOV(°) 12.9547 11.5079 f / EPD 1.9451 2.4328 f(mm) 18.7600 13.2568 T1(mm) 3.1739 0.9739 T2(mm) -3.1739 -0.9739 T3(mm) 0.0097 0.0401

[0092] Table 1-2

[0093] In Example 1, the object side surface and the image side surface of any lens among the first lens E1 to the seventh lens E7 are both aspherical surfaces, and the surface shape x of each aspherical lens can be defined by but not limited to the following aspherical surface formula:

[0094]

[0095] Wherein, x is the distance vector height from the vertex of the aspherical surface when the aspherical surface is at 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 curvature radius R in Table 1-1 above); k is the cone coefficient; Ai is the correction coefficient of the i-th order of the aspherical surface. The following Tables 2-1 and 2-2 give the high-order coefficients A4, A6, A8, A9, A10, A11, A12, A13, A14, A15, A16, A17, A18, A19, A20, A21, A22, A23, A24, A25, A26, A27, A28, A29, A30, A31, A32, A33, A34, A35, A36, A37, A38, A39, A40, A41, A42, A43, A44, A45, A46, A47, A48, A49, A50, A51, A52, A53, A54, A55, A56, A57, A58, A59, A60, A61, A71, A72, A73, A74, A75 10 , A 12 , A 14 , A 16 , A 18 , A 20 , A 22 , A 24 , A 26 , A 28 and A 30 .

[0096]

[0097]

[0098] Table 2-1

[0099] Face number A18 A20 A22 A24 A26 A28 A30 S1 -1.9929E-06 1.6294E-06 -3.4910E-06 -3.2659E-06 -1.3423E-06 -3.7574E-07 1.7768E-06 S2 4.0471E-06 -4.9257E-06 -1.1672E-06 -4.3194E-06 7.4278E-07 7.2417E-07 1.3786E-06 S8 -4.4899E-05 -2.1424E-05 -1.9245E-05 -7.7496E-07 4.7285E-09 2.7972E-06 -5.0628E-06 S9 -3.7751E-04 2.3419E-04 -2.5990E-05 -9.3553E-06 -1.2512E-08 5.0188E-06 -2.2694E-06 S10 -5.8782E-04 3.8390E-04 -1.1788E-04 4.6628E-05 -1.8508E-05 1.1306E-05 -4.3293E-06 S11 -1.9440E-04 2.6411E-04 -1.2419E-04 7.0136E-05 -3.8414E-05 -2.9715E-06 2.8218E-07 S12 -7.2538E-05 9.5259E-05 -7.0230E-05 3.6029E-05 1.3548E-05 -2.0181E-05 4.9881E-06 S13 -5.9529E-05 2.1328E-04 -4.0025E-05 1.7567E-05 3.5037E-05 -2.7412E-05 -3.9079E-06 S14 -1.3769E-04 1.0568E-04 5.9793E-06 -3.4377E-05 4.4685E-05 -9.9499E-06 -3.1507E-06 S15 -2.9964E-05 -4.8025E-06 1.4320E-05 -2.1752E-05 1.3713E-05 -1.5111E-06 -1.8999E-06 S17 2.5118E-04 4.6221E-06 6.4626E-05 5.2117E-06 1.2711E-05 -1.3114E-05 -2.1205E-06 S18 2.6193E-04 8.0661E-05 8.8679E-05 4.2552E-05 2.1540E-05 1.5226E-06 -2.8913E-06 S21 -2.2228E-04 -1.9202E-04 -2.7891E-05 -1.3564E-05 9.1841E-06 1.9536E-06 4.3323E-06 S22 -5.3625E-05 -1.3532E-04 -3.1048E-05 -6.2837E-05 -3.2490E-05 -2.2963E-05 -8.9678E-06

[0100] Table 2-2

[0101] FIG. 2A to FIG. 2D The axial chromatic aberration curve, astigmatism curve, distortion curve and magnification chromatic aberration curve of the optical imaging lens of Example 1 when the object distance is infinite are respectively shown. Figures 2E to 2H The axial chromatic aberration curve, astigmatism curve, distortion curve and magnification chromatic aberration curve of the optical imaging lens of Example 1 when the object distance is 60 mm are respectively shown. Among them, the axial chromatic aberration curve represents the deviation of the convergence point of light of different wavelengths after passing through the lens. The astigmatism curve represents the meridian image curvature and sagittal image curvature. The distortion curve represents the distortion size value corresponding to different image heights. The magnification chromatic aberration curve represents the deviation of different image heights on the imaging surface after the light passes through the lens.

[0102] according to FIG. 2A to FIG. 2H It can be seen that the optical imaging lens provided in Example 1 can achieve good imaging quality when the object distance is infinite and 60 mm.

[0103] Example 2

[0104] The following reference Figures 3 to 4H The optical imaging lens according to Embodiment 2 of the present application is described. In this embodiment and the following embodiments, for the sake of brevity, some descriptions similar to Embodiment 1 will be omitted. Figure 3A schematic structural diagram of the optical imaging lens according to Embodiment 2 of the present application when the object distance is infinite is shown.

[0105] like Figure 3 As shown, the optical imaging lens includes, in order from the object side to the image side along the optical axis: a first lens E1, a reflector P1, an aperture STO, a second lens E2, a third lens E3, a fourth lens E4, a fifth lens E5, a sixth lens E6, a seventh lens E7, a prism E8 and a filter E9. The optical axis is a turning optical axis, including a first optical axis segment 1 and a second optical axis segment 2. The first lens E1 and the reflector P1 are located in the first optical axis segment of the turning optical axis, and the second lens E2, the third lens E3, the fourth lens E4, the fifth lens E5, the sixth lens E6, the seventh lens E7, the prism E8 and the filter E9 are located in the second optical axis segment of the turning optical axis. More specifically, the reflective surface of the reflector P1 is located at the connection between the first optical axis segment and the second optical axis segment of the turning optical axis. Exemplarily, the aperture STO may be provided on the object side of the second lens E2.

[0106] In this embodiment, combined with Table 3-1 and Figure 3 It can be seen that the first lens E1 has positive focal power, its object side surface S1 is convex, and the image side surface S2 is concave. The reflector P1 has a reflecting surface S3. The second lens E2 has positive focal power, its object side surface S8 is convex, and the image side surface S9 is concave. The third lens E3 has negative focal power, its object side surface S10 is convex, and the image side surface S11 is concave. The fourth lens E4 has positive focal power, its object side surface S12 is convex, and the image side surface S13 is concave. The fifth lens E5 has positive focal power, its object side surface S14 is convex, and the image side surface S15 is convex. S16 can be an aperture stop or a spacer. The sixth lens E6 has negative focal power, its object side surface S17 is concave, and the image side surface S18 is convex. S19 and S20 can be aperture stops or spacers. The seventh lens E7 has negative focal power, its object side surface S21 is convex, and the image side surface S22 is concave. The prism E8 has an incident surface S23 ( Figure 3 The optical imaging lens has an imaging surface S28 (not shown), a reflection surface S24 and an emission surface S25, and the filter E9 has an object side surface S26 and an image side surface S27. Figure 3 (not shown), the light from the object passes through the first lens E1 to the reflector P1 in sequence along the first optical axis segment, is reflected by the reflector P1 to the second optical axis segment, and then passes through the aperture STO, the second lens E2, the third lens E3, the fourth lens E4, the fifth lens E5, the sixth lens E6, the seventh lens E7, the prism E8 and the filter E9 in sequence along the second optical axis segment, and is finally imaged on the imaging surface S28.

[0107] Table 3-1 shows the basic parameter table of the optical imaging lens of Example 2, wherein the units of the curvature radius and thickness / distance are both millimeters (mm).

[0108]

[0109]

[0110] Table 3-1

[0111] In this embodiment, the combined focal length f2345 of the second lens, the third lens, the fourth lens and the fifth lens of the optical imaging lens is 10.87 mm, and the combined focal length f67 of the sixth lens and the seventh lens is -9.52 mm.

[0112] Table 3-2 shows the values ​​of T1, T2, and T3 when the distance M between the optical imaging lens and the object is infinity and 60 mm, respectively. In this embodiment, when the object distance is switched from infinity to 60 mm, the second lens group as a whole moves closer to the reflector and away from the third lens group, and the change in T1 and T2 is 3.1861 mm-0.9861 mm=2.2 mm, that is, the second lens group moves 2.2 mm closer to the reflector and away from the third lens group by 2.2 mm; at the same time, the imaging plane adjusts its position accordingly according to the actual shooting situation, for example, T3 changes from 0.0101 mm to 0.0401 mm.

[0113] Table 3-2 also shows the values ​​of the maximum half field of view Semi-FOV, aperture number f / EPD, and effective focal length f of the optical imaging lens at different object distances.

[0114] First State Second State M(mm) Infinity 60 Semi-FOV(°) 18.2608 11.3748 f / EPD 1.9439 2.4328 f(mm) 18.76 13.2571 T1(mm) 3.1861 0.9861 T2(mm) -3.1861 -0.9861 T3(mm) 0.0101 0.0401

[0115] Table 3-2

[0116] Table 4-1 and Table 4-2 show the high-order coefficients of each aspherical mirror surface that can be used in Example 2, wherein each aspherical surface shape can be defined by the formula (1) given in the above-mentioned Example 1.

[0117]

[0118]

[0119] Table 4-1

[0120] Face number A18 A20 A22 A24 A26 A28 A30 S1 4.8351E-06 1.9600E-07 -1.1668E-06 -4.0585E-06 -1.1182E-06 -9.7507E-07 1.6157E-06 S2 1.1669E-05 -8.1988E-06 9.3165E-07 -5.9223E-06 1.1661E-06 -1.2614E-07 1.2723E-06 S8 -8.6708E-05 -4.5611E-05 -2.9341E-05 -2.4533E-06 -3.6832E-06 -1.5944E-06 -7.9501E-06 S9 -2.6271E-04 3.4900E-04 -6.7793E-05 -3.0164E-05 5.2701E-06 7.8659E-06 -9.9399E-06 S10 -5.8174E-04 4.2548E-04 -1.3469E-04 3.6719E-05 -2.0177E-05 2.0139E-05 -8.2827E-06 S11 -1.7511E-04 3.0744E-04 -1.4170E-04 5.8052E-05 -4.2238E-05 -2.3462E-06 1.3122E-07 S12 -3.5388E-05 1.4621E-04 -7.5910E-05 3.6216E-05 -5.6843E-07 -2.9412E-05 1.1818E-05 S13 -1.8046E-05 2.7400E-04 -4.6110E-05 2.3602E-05 4.1642E-05 -4.4936E-05 -9.7715E-06 S14 -4.2443E-05 2.1172E-04 -4.4927E-07 -1.1139E-05 6.0539E-05 -3.9849E-05 -1.4817E-05 S15 -6.0938E-05 -1.2197E-05 -2.6444E-06 -2.5660E-05 1.7441E-05 -9.5556E-06 -4.8699E-06 S17 3.2944E-04 3.0167E-05 7.6423E-05 7.4088E-07 4.2213E-06 -1.9838E-05 -3.5699E-06 S18 3.4828E-04 1.3413E-04 1.2639E-04 6.2785E-05 3.1490E-05 6.3077E-06 -1.4450E-06 S21 -1.1343E-04 -1.4765E-04 -1.7249E-05 -1.5629E-05 7.0714E-06 1.1091E-06 4.6263E-06 S22 -1.0688E-05 -1.0472E-04 -8.4503E-06 -4.5404E-05 -1.9155E-05 -1.6132E-05 -6.4342E-06

[0121] Table 4-2

[0122] FIG. 4A to FIG. 4D The axial chromatic aberration curve, astigmatism curve, distortion curve and magnification chromatic aberration curve of the optical imaging lens of Example 2 when the object distance is infinite are respectively shown, FIG. 4E to FIG. 4HThe axial chromatic aberration curve, astigmatism curve, distortion curve and magnification chromatic aberration curve of the optical imaging lens of Example 2 when the object distance is 60 mm are respectively shown. Among them, the axial chromatic aberration curve represents the deviation of the convergence point of light of different wavelengths after passing through the lens. The astigmatism curve represents the meridian image curvature and sagittal image curvature. The distortion curve represents the distortion size value corresponding to different image heights. The magnification chromatic aberration curve represents the deviation of different image heights on the imaging surface after the light passes through the lens.

[0123] according to 4A to 4H It can be seen that the optical imaging lens provided in Example 2 can achieve good imaging quality when the object distance is infinite and 60 mm.

[0124] Example 3

[0125] The following reference Figures 5 to 6H An optical imaging lens according to Embodiment 3 of the present application is described. Figure 5 A schematic structural diagram of the optical imaging lens according to Embodiment 3 of the present application when the object distance is infinite is shown.

[0126] like Figure 5 As shown, the optical imaging lens includes, in order from the object side to the image side along the optical axis: a first lens E1, a reflector P1, an aperture STO, a second lens E2, a third lens E3, a fourth lens E4, a fifth lens E5, a sixth lens E6, a seventh lens E7, a prism E8 and a filter E9. The optical axis is a turning optical axis, including a first optical axis segment 1 and a second optical axis segment 2. The first lens E1 and the reflector P1 are located in the first optical axis segment of the turning optical axis, and the second lens E2, the third lens E3, the fourth lens E4, the fifth lens E5, the sixth lens E6, the seventh lens E7, the prism E8 and the filter E9 are located in the second optical axis segment of the turning optical axis. More specifically, the reflective surface of the reflector P1 is located at the connection between the first optical axis segment and the second optical axis segment of the turning optical axis. Exemplarily, the aperture STO may be provided on the object side of the second lens E2.

[0127] In this embodiment, combined with Table 5-1 and Figure 5It can be seen that the first lens E1 has positive focal power, its object side surface S1 is convex, and the image side surface S2 is concave. The reflector P1 has a reflecting surface S3. The second lens E2 has positive focal power, its object side surface S8 is convex, and the image side surface S9 is concave. The third lens E3 has negative focal power, its object side surface S10 is convex, and the image side surface S11 is concave. The fourth lens E4 has positive focal power, its object side surface S12 is convex, and the image side surface S13 is concave. The fifth lens E5 has positive focal power, its object side surface S14 is convex, and the image side surface S15 is convex. S16 can be an aperture stop or a spacer. The sixth lens E6 has negative focal power, its object side surface S17 is concave, and the image side surface S18 is convex. S19 and S20 can be aperture stops or spacers. The seventh lens E7 has negative focal power, its object side surface S21 is convex, and the image side surface S22 is concave. The prism E8 has an incident surface S23 ( Figure 5 The optical imaging lens has an imaging surface S28 (not shown), a reflection surface S24 and an emission surface S25, and the filter E9 has an object side surface S26 and an image side surface S27. Figure 5 (not shown), the light from the object passes through the first lens E1 to the reflector P1 in sequence along the first optical axis segment, is reflected by the reflector P1 to the second optical axis segment, and then passes through the aperture STO, the second lens E2, the third lens E3, the fourth lens E4, the fifth lens E5, the sixth lens E6, the seventh lens E7, the prism E8 and the filter E9 in sequence along the second optical axis segment, and is finally imaged on the imaging surface S28.

[0128] Table 5-1 shows the basic parameter table of the optical imaging lens of Example 3, wherein the units of the radius of curvature and thickness / distance are both millimeters (mm).

[0129]

[0130]

[0131] Table 5-1

[0132] In this embodiment, the combined focal length f2345 of the second lens, the third lens, the fourth lens and the fifth lens of the optical imaging lens is 10.89 mm, and the combined focal length f67 of the sixth lens and the seventh lens is -9.49 mm.

[0133] Table 5-2 shows the values ​​of T1, T2, and T3 when the distance M between the optical imaging lens and the object is infinity and 60 mm, respectively. In this embodiment, when the object distance is switched from infinity to 60 mm, the second lens group as a whole moves closer to the reflector and away from the third lens group, and the change in T1 and T2 is 3.2014 mm-1.0014 mm=2.2 mm, that is, the second lens group moves 2.2 mm closer to the reflector and away from the third lens group by 2.2 mm; at the same time, the imaging surface adjusts its position accordingly according to the actual shooting situation, for example, T3 changes from 0.0204 mm to 0.0391 mm.

[0134] Table 5-2 also shows the values ​​of the maximum half field of view Semi-FOV, aperture number f / EPD, and effective focal length f of the optical imaging lens at different object distances.

[0135] First State Second State M(mm) Infinity 60 Semi-FOV(°) 12.9458 11.0394 f / EPD 1.9425 2.4301 f(mm) 18.7589 13.2386 T1(mm) 3.2014 1.0014 T2(mm) -3.2014 -1.0014 T3(mm) 0.0204 0.0391

[0136] Table 5-2

[0137] Table 6-1 and Table 6-2 show the high-order coefficients of each aspherical mirror surface that can be used in Example 3, wherein each aspherical surface shape can be defined by the formula (1) given in the above-mentioned Example 1.

[0138]

[0139]

[0140] Table 6-1

[0141] Face number A18 A20 A22 A24 A26 A28 A30 S1 1.1252E-05 2.1307E-06 -7.8705E-06 -6.1540E-06 -4.6559E-06 1.1538E-06 2.2201E-06 S2 1.8723E-05 -1.5057E-05 -4.4385E-06 -8.6723E-06 1.3290E-06 2.5088E-06 9.5899E-07 S8 -5.7795E-05 -3.0134E-05 -2.6416E-05 -3.3068E-06 -6.2843E-06 -1.1834E-06 -8.6944E-06 S9 -2.3396E-04 4.1457E-04 -1.1619E-04 -6.9088E-05 9.6512E-06 4.1308E-05 -2.1680E-05 S10 -5.5027E-04 4.3995E-04 -1.3361E-04 -2.1275E-05 -2.3937E-05 4.2447E-05 -1.2570E-05 S11 -1.0600E-04 2.8628E-04 -1.4720E-04 6.2000E-06 -4.8506E-05 -3.7579E-06 -7.4358E-07 S12 -3.5003E-05 1.5590E-04 -9.8717E-05 1.1145E-05 4.8430E-06 -3.4413E-05 1.1300E-05 S13 -8.2680E-05 2.8729E-04 -5.5111E-05 -6.1585E-06 6.4763E-05 -3.8529E-05 -7.9770E-06 S14 -1.1444E-04 2.3842E-04 -2.2523E-07 -4.7123E-05 8.9457E-05 -5.1772E-05 -1.3418E-05 S15 -9.1934E-05 -6.6438E-06 1.4381E-05 -4.2339E-05 3.2936E-05 -1.7004E-05 -4.3217E-06 S17 1.7215E-04 -4.9642E-05 3.9391E-05 -2.0853E-05 4.6202E-06 -2.1211E-05 -5.3357E-07 S18 1.9759E-04 2.4311E-05 6.0491E-05 3.0425E-05 1.9708E-05 4.3518E-06 -1.8683E-06 S21 7.5526E-05 -6.3477E-05 1.8835E-05 -5.1000E-06 1.1444E-05 7.3437E-07 4.9917E-06 S22 3.5476E-05 -6.5342E-05 2.5980E-05 -2.1077E-05 3.3009E-07 -7.3889E-06 -8.2901E-07

[0142] Table 6-2

[0143] FIG. 6A to FIG. 6D The axial chromatic aberration curve, astigmatism curve, distortion curve and magnification chromatic aberration curve of the optical imaging lens of Example 3 when the object distance is infinite are respectively shown. FIG. 6E to FIG. 6H The axial chromatic aberration curve, astigmatism curve, distortion curve and magnification chromatic aberration curve of the optical imaging lens of Example 3 when the object distance is 60 mm are respectively shown. Among them, the axial chromatic aberration curve represents the deviation of the convergence point of light of different wavelengths after passing through the lens. The astigmatism curve represents the meridian image curvature and sagittal image curvature. The distortion curve represents the distortion size value corresponding to different image heights. The magnification chromatic aberration curve represents the deviation of different image heights on the imaging surface after the light passes through the lens.

[0144] according to 6A to 6H It can be seen that the optical imaging lens provided in Example 3 can achieve good imaging quality when the object distance is infinite or 60 mm.

[0145] Example 4

[0146] The following reference Figures 7 to 8H An optical imaging lens according to Embodiment 4 of the present application is described. Figure 7 A schematic structural diagram of the optical imaging lens according to Embodiment 4 of the present application when the object distance is infinite is shown.

[0147] like Figure 7 As shown, the optical imaging lens includes, in order from the object side to the image side along the optical axis: a first lens E1, a reflector P1, an aperture STO, a second lens E2, a third lens E3, a fourth lens E4, a fifth lens E5, a sixth lens E6, a seventh lens E7, a prism E8 and a filter E9. The optical axis is a turning optical axis, including a first optical axis segment 1 and a second optical axis segment 2. The first lens E1 and the reflector P1 are located in the first optical axis segment of the turning optical axis, and the second lens E2, the third lens E3, the fourth lens E4, the fifth lens E5, the sixth lens E6, the seventh lens E7, the prism E8 and the filter E9 are located in the second optical axis segment of the turning optical axis. More specifically, the reflective surface of the reflector P1 is located at the connection between the first optical axis segment and the second optical axis segment of the turning optical axis. Exemplarily, the aperture STO may be provided on the object side of the second lens E2.

[0148] In this embodiment, combined with Table 7-1 and Figure 7 It can be seen that the first lens E1 has positive focal power, its object side surface S1 is convex, and the image side surface S2 is concave. The reflector P1 has a reflecting surface S3. The second lens E2 has positive focal power, its object side surface S8 is convex, and the image side surface S9 is concave. The third lens E3 has negative focal power, its object side surface S10 is convex, and the image side surface S11 is concave. The fourth lens E4 has positive focal power, its object side surface S12 is convex, and the image side surface S13 is concave. The fifth lens E5 has positive focal power, its object side surface S14 is concave, and the image side surface S15 is convex. S16 can be an aperture stop or a spacer. The sixth lens E6 has negative focal power, its object side surface S17 is concave, and the image side surface S18 is convex. S19 and S20 can be aperture stops or spacers. The seventh lens E7 has negative focal power, its object side surface S21 is convex, and the image side surface S22 is concave. The prism E8 has an incident surface S23 ( Figure 7 The optical imaging lens has an imaging surface S28 (not shown), a reflection surface S24 and an emission surface S25, and the filter E9 has an object side surface S26 and an image side surface S27. Figure 7(not shown), the light from the object passes through the first lens E1 to the reflector P1 in sequence along the first optical axis segment, is reflected by the reflector P1 to the second optical axis segment, and then passes through the aperture STO, the second lens E2, the third lens E3, the fourth lens E4, the fifth lens E5, the sixth lens E6, the seventh lens E7, the prism E8 and the filter E9 in sequence along the second optical axis segment, and is finally imaged on the imaging surface S28.

[0149] Table 7-1 shows the basic parameter table of the optical imaging lens of Example 4, wherein the units of the radius of curvature and thickness / distance are both millimeters (mm).

[0150]

[0151]

[0152] Table 7-1

[0153] In this embodiment, the combined focal length f2345 of the second lens, the third lens, the fourth lens and the fifth lens of the optical imaging lens is 10.89 mm, and the combined focal length f67 of the sixth lens and the seventh lens is -9.5 mm.

[0154] Table 7-2 shows the values ​​of T1, T2, and T3 when the distance M between the optical imaging lens and the object is infinity and 60 mm, respectively. In this embodiment, when the object distance is switched from infinity to 60 mm, the second lens group as a whole moves closer to the reflector and away from the third lens group, and the change in T1 and T2 is 3.2003 mm-1.0003 mm=2.2 mm, that is, the second lens group moves 2.2 mm closer to the reflector and away from the third lens group by 2.2 mm; at the same time, the imaging surface adjusts its position accordingly according to the actual shooting situation, for example, T3 changes from 0.0214 mm to 0.04 mm.

[0155] Table 7-2 also shows the values ​​of the maximum half field of view Semi-FOV, aperture number f / EPD, and effective focal length f of the optical imaging lens at different object distances.

[0156] First State Second State M(mm) Infinity 60 Semi-FOV(°) 12.9707 11.0862 f / EPD 1.9398 2.4301 f(mm) 18.76 13.2432 T1(mm) 3.2003 1.0003 T2(mm) -3.2003 -1.0003 T3(mm) 0.0214 0.04

[0157] Table 7-2

[0158] Table 8-1 and Table 8-2 show the high-order coefficients of each aspherical mirror surface that can be used in Example 4, wherein each aspherical surface shape can be defined by the formula (1) given in the above-mentioned Example 1.

[0159]

[0160]

[0161] Table 8-1

[0162] Face number A18 A20 A22 A24 A26 A28 A30 S1 9.8813E-07 9.1835E-06 -5.8227E-06 -7.6190E-06 -5.8122E-06 3.2748E-06 1.2731E-06 S2 1.2316E-05 -7.3090E-06 -4.1909E-06 -1.1161E-05 2.4764E-06 3.5933E-06 -5.3467E-08 S8 -7.7732E-05 -3.2717E-05 -2.7792E-05 -2.1593E-06 -8.9095E-06 -4.1924E-06 -1.0848E-05 S9 -2.2283E-04 4.4069E-04 -1.7045E-04 -7.1747E-05 9.5251E-06 4.5788E-05 -2.3527E-05 S10 -4.5092E-04 4.3848E-04 -1.3282E-04 -3.6386E-05 -2.1901E-05 4.3160E-05 -1.1535E-05 S11 -1.4956E-04 2.2969E-04 -9.8930E-05 1.0305E-05 -3.3922E-05 2.6461E-06 -2.4996E-06 S12 -9.2945E-05 1.3452E-04 -9.3967E-05 9.0123E-06 3.9614E-06 -2.6922E-05 9.3256E-06 S13 2.1370E-03 -9.6532E-04 -9.3855E-04 2.2106E-04 -3.6362E-04 6.3458E-04 -1.2440E-04 S14 1.5829E-03 -1.4160E-03 -6.2441E-04 2.7306E-04 -1.8306E-04 7.4039E-04 -1.9697E-04 S15 -1.2090E-04 -5.0863E-06 2.2761E-05 -4.8128E-05 3.1017E-05 -1.3597E-05 -5.8889E-06 S17 3.8206E-04 9.1381E-05 1.1746E-04 2.4334E-06 1.3156E-05 -2.1675E-05 -3.3957E-06 S18 3.7911E-04 2.1578E-04 2.1240E-04 1.1723E-04 5.7448E-05 1.7786E-05 -5.4149E-07 S21 -1.7135E-04 -1.8181E-04 2.1602E-06 8.6841E-06 2.7653E-05 1.4111E-05 8.4330E-06 S22 1.0826E-05 -1.0138E-04 8.4057E-06 -5.9448E-05 -3.1977E-05 -3.1086E-05 -1.5712E-05

[0163] Table 8-2

[0164] FIG. 8A to FIG. 8D The axial chromatic aberration curve, astigmatism curve, distortion curve and magnification chromatic aberration curve of the optical imaging lens of Example 4 when the object distance is infinite are respectively shown. FIG. 8E to FIG. 8H The axial chromatic aberration curve, astigmatism curve, distortion curve and magnification chromatic aberration curve of the optical imaging lens of Example 4 when the object distance is 60 mm are respectively shown. Among them, the axial chromatic aberration curve represents the deviation of the convergence point of light of different wavelengths after passing through the lens. The astigmatism curve represents the meridian image curvature and sagittal image curvature. The distortion curve represents the distortion size value corresponding to different image heights. The magnification chromatic aberration curve represents the deviation of different image heights on the imaging surface after the light passes through the lens.

[0165] according to FIG. 8A to FIG. 8H It can be seen that the optical imaging lens provided in Example 4 can achieve good imaging quality when the object distance is infinite or 60 mm.

[0166] Example 5

[0167] The following reference Figures 9 to 10H The optical imaging lens according to Embodiment 5 of the present application is described. In this embodiment and the following embodiments, for the sake of brevity, some descriptions similar to Embodiment 1 will be omitted. Fig. 9 A schematic structural diagram of the optical imaging lens according to Embodiment 5 of the present application when the object distance is infinite is shown.

[0168] like Fig. 9 As shown, the optical imaging lens includes, in order from the object side to the image side along the optical axis: a first lens E1, a reflector P1, an aperture STO, a second lens E2, a third lens E3, a fourth lens E4, a fifth lens E5, a sixth lens E6, a seventh lens E7, a prism E8 and a filter E9. The optical axis is a turning optical axis, including a first optical axis segment 1 and a second optical axis segment 2. The first lens E1 and the reflector P1 are located in the first optical axis segment of the turning optical axis, and the second lens E2, the third lens E3, the fourth lens E4, the fifth lens E5, the sixth lens E6, the seventh lens E7, the prism E8 and the filter E9 are located in the second optical axis segment of the turning optical axis. More specifically, the reflective surface of the reflector P1 is located at the connection between the first optical axis segment and the second optical axis segment of the turning optical axis. Exemplarily, the aperture STO may be provided on the object side of the second lens E2.

[0169] In this embodiment, combined with Table 9-1 and Fig. 9It can be seen that the first lens E1 has positive focal power, its object side surface S1 is convex, and the image side surface S2 is concave. The reflector P1 has a reflecting surface S3. The second lens E2 has positive focal power, its object side surface S8 is convex, and the image side surface S9 is concave. The third lens E3 has negative focal power, its object side surface S10 is convex, and the image side surface S11 is concave. The fourth lens E4 has positive focal power, its object side surface S12 is convex, and the image side surface S13 is concave. The fifth lens E5 has positive focal power, its object side surface S14 is convex, and the image side surface S15 is convex. S16 can be an aperture stop or a spacer. The sixth lens E6 has negative focal power, its object side surface S17 is concave, and the image side surface S18 is convex. S19 and S20 can be aperture stops or spacers. The seventh lens E7 has negative focal power, its object side surface S21 is convex, and the image side surface S22 is concave. The prism E8 has an incident surface S23 ( Fig. 9 The optical imaging lens has an imaging surface S28 (not shown), a reflection surface S24 and an emission surface S25, and the filter E9 has an object side surface S26 and an image side surface S27. Fig. 9 (not shown), the light from the object passes through the first lens E1 to the reflector P1 in sequence along the first optical axis segment, is reflected by the reflector P1 to the second optical axis segment, and then passes through the aperture STO, the second lens E2, the third lens E3, the fourth lens E4, the fifth lens E5, the sixth lens E6, the seventh lens E7, the prism E8 and the filter E9 in sequence along the second optical axis segment, and is finally imaged on the imaging surface S28.

[0170] Table 9-1 shows the basic parameter table of the optical imaging lens of Example 5, wherein the units of the curvature radius and thickness / distance are both millimeters (mm).

[0171]

[0172]

[0173] Table 9-1

[0174] In this embodiment, the combined focal length f2345 of the second lens, the third lens, the fourth lens and the fifth lens of the optical imaging lens is 10.89 mm, and the combined focal length f67 of the sixth lens and the seventh lens is -9.48 mm.

[0175] Table 9-2 shows the values ​​of T1, T2, and T3 when the distance M between the optical imaging lens and the object is infinity and 60 mm, respectively. In this embodiment, when the object distance is switched from infinity to 60 mm, the second lens group as a whole moves closer to the reflector and away from the third lens group, and the change in T1 and T2 is 3.199 mm-0.999 mm=2.2 mm, that is, the second lens group moves 2.2 mm closer to the reflector and away from the third lens group by 2.2 mm; at the same time, the imaging surface adjusts its position accordingly according to the actual shooting situation, for example, T3 changes from 0.0248 mm to 0.0400 mm.

[0176] Table 9-2 also shows the values ​​of the maximum half field of view Semi-FOV, aperture number f / EPD, and effective focal length f of the optical imaging lens at different object distances.

[0177] First State Second State M(mm) Infinity 60 Semi-FOV(°) 12.9697 11.0999 f / EPD 1.9398 2.4257 f(mm) 18.76 13.2343 T1(mm) 3.199 0.999 T2(mm) -3.199 -0.999 T3(mm) 0.0248 0.0400

[0178] Table 9-2

[0179] Tables 10-1 and 10-2 show the high-order coefficients of each aspherical mirror surface that can be used in Example 5, wherein each aspherical surface shape can be defined by formula (1) given in the above Example 1.

[0180]

[0181]

[0182] Table 10-1

[0183] Face number A18 A20 A22 A24 A26 A28 A30 S1 -9.0557E-06 1.0968E-05 -8.4627E-06 -1.9182E-06 -4.9272E-06 1.9773E-06 1.1173E-06 S2 2.1652E-06 -2.7251E-06 -5.2695E-06 -5.4887E-06 4.6477E-07 2.5050E-06 4.0155E-07 S8 -7.4741E-05 -3.7060E-05 -3.0692E-05 -2.4586E-06 -7.3394E-06 -3.4451E-06 -1.0006E-05 S9 -2.0595E-04 4.3119E-04 -1.7291E-04 -7.0519E-05 1.6188E-05 4.5913E-05 -2.6583E-05 S10 -4.4632E-04 4.3989E-04 -1.5210E-04 -3.9080E-05 -1.6657E-05 4.6942E-05 -1.4173E-05 S11 -5.5233E-05 2.6209E-04 -1.1093E-04 1.6373E-06 -4.1820E-05 -9.2567E-07 -5.0334E-06 S12 -2.5645E-05 1.5163E-04 -9.6997E-05 1.0708E-05 -2.5117E-06 -3.2250E-05 7.2294E-06 S13 5.2225E-06 3.1518E-04 -8.4460E-05 -6.2958E-06 4.4600E-05 -6.5136E-05 -1.6132E-05 S14 -8.3330E-05 2.6661E-04 -3.2450E-06 -5.5367E-05 8.7177E-05 -6.5633E-05 -1.8799E-05 S15 -9.3146E-05 -3.0527E-06 1.8591E-05 -5.2086E-05 3.3800E-05 -1.8866E-05 -4.5390E-06 S17 3.3189E-04 1.3950E-05 8.0811E-05 -1.8669E-05 1.0365E-05 -2.6206E-05 -2.4517E-06 S18 3.1670E-04 1.1144E-04 1.2341E-04 5.1023E-05 2.4386E-05 2.4127E-06 -5.6810E-06 S21 -1.5864E-04 -1.9858E-04 -3.3634E-05 -3.0058E-05 1.5179E-06 -7.9170E-07 4.2745E-06 S22 2.0204E-06 -1.0617E-04 2.7583E-06 -5.3748E-05 -2.3728E-05 -2.4050E-05 -1.0287E-05

[0184] Table 10-2

[0185] FIG. 10A to FIG. 10D The axial chromatic aberration curve, astigmatism curve, distortion curve and magnification chromatic aberration curve of the optical imaging lens of Example 5 when the object distance is infinite are respectively shown, FIG. 10E to FIG. 10H The axial chromatic aberration curve, astigmatism curve, distortion curve and magnification chromatic aberration curve of the optical imaging lens of Example 5 when the object distance is 60 mm are respectively shown. Among them, the axial chromatic aberration curve represents the deviation of the convergence point of light of different wavelengths after passing through the lens. The astigmatism curve represents the meridian image curvature and sagittal image curvature. The distortion curve represents the distortion size value corresponding to different image heights. The magnification chromatic aberration curve represents the deviation of different image heights on the imaging surface after the light passes through the lens.

[0186] according to FIG. 10A to FIG. 10H It can be seen that the optical imaging lens provided in Example 5 can achieve good imaging quality when the object distance is infinite or 60 mm.

[0187] In summary, the imaging lenses of Examples 1 to 5 satisfy the relationship shown in Table 11.

[0188]

[0189]

[0190] Table 11

[0191] The present application also provides an imaging device, whose electronic photosensitive element can be a photosensitive coupled device (CCD) or a complementary metal oxide semiconductor element (CMOS). The imaging device can be an independent imaging device such as a digital camera, or an imaging module integrated in a mobile electronic device such as a mobile phone. The imaging device is equipped with the optical imaging lens described above.

[0192] The above description is only a preferred embodiment of the present application and an explanation of the technical principles used. Those skilled in the art should understand that the scope of the invention involved in the present application is not limited to the technical solution formed by a specific combination of the above technical features, but should also cover other technical solutions formed by any combination of the above technical features or their equivalent features without departing from the inventive concept. For example, the above features are replaced with the technical features with similar functions disclosed in this application (but not limited to) by each other.

Claims

1. An optical imaging lens, characterized in that: The optical imaging lens comprises, in order from the object side to the image side along the optical axis: a first lens group, a reflector, a second lens group and a third lens group; The first lens group includes: a first lens having positive optical power; The second lens group includes: a second lens with positive power, a third lens with negative power, a fourth lens with positive power, and a fifth lens with positive power; The third lens group includes: a sixth lens having negative optical power and a seventh lens having negative optical power; The number of lenses having optical power in the optical imaging lens is seven; The optical imaging lens satisfies the following conditions: 46.09≤f1 / CT1+f2 / CT2≤48.34 and 2.04≤T67 / CT6≤2.32, wherein f1 is the effective focal length of the first lens, CT1 is the center thickness of the first lens on the optical axis, f2 is the effective focal length of the second lens, CT2 is the center thickness of the second lens on the optical axis, T67 is the air interval between the sixth lens and the seventh lens on the optical axis, and CT6 is the center thickness of the sixth lens on the optical axis.

2. The optical imaging lens according to claim 1, wherein: The optical imaging lens satisfies: 5.62≤f1 / R1+f1 / R2≤5.89, wherein f1 is the effective focal length of the first lens, R1 is the curvature radius of the object side surface of the first lens, and R2 is the curvature radius of the image side surface of the first lens.

3. The optical imaging lens according to claim 1, wherein: The optical imaging lens satisfies: 6.81≤(f5+f6) / f7≤11.10, wherein f5 is the effective focal length of the fifth lens, f6 is the effective focal length of the sixth lens, and f7 is the effective focal length of the seventh lens.

4. The optical imaging lens according to claim 1, wherein: The optical imaging lens satisfies: 4.38≤R2×N1 / (R3×N2)≤4.67, wherein R2 is the curvature radius of the image side surface of the first lens, R3 is the curvature radius of the object side surface of the second lens, N1 is the refractive index of the first lens, and N2 is the refractive index of the second lens.

5. The optical imaging lens according to claim 1, wherein: The optical imaging lens satisfies: 25.91≤R5 / CT3+R5 / f3≤50.27, wherein R5 is the radius of curvature of the object side surface of the third lens, CT3 is the center thickness of the third lens on the optical axis, and f3 is the effective focal length of the third lens.

6. The optical imaging lens according to claim 1, wherein: The optical imaging lens satisfies: 7.80≤f4×N4 / R7≤14.17, wherein f4 is the effective focal length of the fourth lens, N4 is the refractive index of the fourth lens, and R7 is the curvature radius of the object side surface of the fourth lens.

7. The optical imaging lens according to claim 1, wherein: The optical imaging lens satisfies: 10.96≤f5×V5 / |R9|≤21.34, wherein f5 is the effective focal length of the fifth lens, V5 is the Abbe number of the fifth lens, and R9 is the radius of curvature of the object side surface of the fifth lens.

8. The optical imaging lens according to claim 1, wherein: The optical imaging lens satisfies: 13.13≤f6 / (R11+R12)≤20.48, wherein f6 is the effective focal length of the sixth lens, R11 is the radius of curvature of the object side surface of the sixth lens, and R12 is the radius of curvature of the image side surface of the sixth lens.

9. The optical imaging lens according to claim 1, wherein: The optical imaging lens satisfies: -30.89≤f7×V7 / R13≤-30.41, wherein f7 is the effective focal length of the seventh lens, V7 is the Abbe number of the seventh lens, and R13 is the radius of curvature of the object side surface of the seventh lens.

10. The optical imaging lens according to claim 1, wherein: The optical imaging lens satisfies: 0.89≤|f3×N3 / R4|≤0.90, wherein f3 is the effective focal length of the third lens, N3 is the refractive index of the third lens, and R4 is the radius of curvature of the image side surface of the second lens.

11. The optical imaging lens according to claim 1, wherein: The optical imaging lens satisfies: 0.66≤T67 / (CT3+T34+T45)≤0.89, wherein T67 is an air interval between the sixth lens and the seventh lens on the optical axis, CT3 is a center thickness of the third lens on the optical axis, T34 is an air interval between the third lens and the fourth lens on the optical axis, and T45 is an air interval between the fourth lens and the fifth lens on the optical axis.

12. The optical imaging lens according to claim 1, wherein: The optical imaging lens satisfies: -0.55≤f1 / f7+f1 / f2<-0.3, wherein f1 is the effective focal length of the first lens, f2 is the effective focal length of the second lens, and f7 is the effective focal length of the seventh lens.

13. The optical imaging lens according to claim 1, wherein: The optical imaging lens satisfies: -11.38≤F6 / F5≤-9.11, wherein f5 is the effective focal length of the fifth lens, and f6 is the effective focal length of the sixth lens.

14. The optical imaging lens according to claim 1, wherein: The optical imaging lens satisfies: 2.31≤(R10+R11) / (R10-R11)≤2.44, wherein R10 is the curvature radius of the image side surface of the fifth lens, and R11 is the curvature radius of the object side surface of the sixth lens.

15. The optical imaging lens according to any one of claims 1 to 14, characterized in that: When the object distance changes, the optical imaging lens achieves focusing through the overall movement of the second lens group along the optical axis; The optical imaging lens satisfies: 7.70≤f2345 / (CT3+CT5)≤8.71, f2345 is the combined focal length of the second lens, the third lens, the fourth lens and the fifth lens, CT3 is the center thickness of the third lens on the optical axis, and CT5 is the center thickness of the fifth lens on the optical axis.

16. The optical imaging lens according to any one of claims 1 to 14, characterized in that: The optical imaging lens satisfies: -7.53≤f67 / (CT6+CT7)≤-7.16, wherein f67 is the combined focal length of the sixth lens and the seventh lens, CT6 is the center thickness of the sixth lens on the optical axis, and CT7 is the center thickness of the seventh lens on the optical axis.

17. The optical imaging lens according to any one of claims 1 to 14, characterized in that: The optical imaging lens further includes a prism disposed on the image side of the seventh lens.

18. The optical imaging lens according to any one of claims 1 to 14, characterized in that: The object side surfaces of the first lens, the second lens, the third lens, the fourth lens and the seventh lens are all convex surfaces, and the image side surfaces are all concave surfaces; The image side surface of the fifth lens is a convex surface; The object side surface of the sixth lens is concave, and the image side surface is convex.

Images