Optical imaging lens

Abstract

The present application discloses an optical imaging lens, which includes, in order from the object side to the image side along the optical axis: a first lens, a second lens, a third lens, a fourth lens, a fifth lens, a sixth lens, a seventh lens and an eighth lens, wherein the object side surface of the third lens is convex; the object side surface of the fourth lens is concave; the sixth lens has positive optical focal length, and its image side surface is convex; the seventh lens has positive optical focal length; the object side surface of the eighth lens is concave, and its image side surface is concave. The distance TTL from the object side surface of the first lens to the imaging surface of the optical imaging lens along the optical axis and half the diagonal length of the effective pixel area on the imaging surface ImgH satisfy: TTL / ImgH≤1.26. The effective focal length f3 of the third lens and the effective focal length f of the optical imaging lens satisfy: 2.7 <f3 / f<6。

Description

Technical Field

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

[0002] As mobile phones continue to evolve towards lighter and more portable form factors, while simultaneously meeting growing consumer demands, mobile phone lens design faces a series of new challenges. Ultra-thin, large image sensors are currently the dominant trend in flagship main cameras, but this trend presents optical designers with even greater challenges.

[0003] Traditional five- and six-element lens structures struggle to effectively correct aberrations and improve image quality within today's demanding ultra-thin, large image formats. Seven- and eight-element optical imaging lens systems are gradually becoming the mainstream design approach. Therefore, designing and developing an optical imaging lens with ultra-thin, large image formats and excellent imaging performance to better meet the application requirements of main cameras in next-generation high-end smartphones is a pressing challenge for those skilled in the art. Summary of the Invention

[0004] The present application provides an optical imaging lens, which may include, in order from the object side to the image side along the optical axis: a first lens, a second lens, a third lens, a fourth lens, a fifth lens, a sixth lens, a seventh lens and an eighth lens, wherein the object side surface of the third lens is convex; the object side surface of the fourth lens is concave; the sixth lens has positive optical focal length, and its image side surface is convex; the seventh lens has positive optical focal length; the object side surface of the eighth lens is concave, and its image side surface is concave. The distance TTL from the object side surface of the first lens to the imaging surface of the optical imaging lens along the optical axis and half the diagonal length of the effective pixel area on the imaging surface ImgH may satisfy: TTL / ImgH≤1.26. The effective focal length f3 of the third lens and the effective focal length f of the optical imaging lens may satisfy: 2.7 <f3 / f<6。

[0005] In one embodiment, the distance TTL from the object side of the first lens to the imaging surface along the optical axis and the entrance pupil diameter EPD of the optical imaging lens may satisfy: 6mm 2 <TTL×EPD<28mm 2 .

[0006] In one embodiment, the effective focal length f8 of the eighth lens, the curvature radius R15 of the object side surface of the eighth lens, and the curvature radius R16 of the image side surface of the eighth lens may satisfy: <f8 / (R15+R16)<0。

[0007] In one embodiment, the center thickness CT1 of the first lens on the optical axis and the center thickness CT7 of the seventh lens on the optical axis may satisfy: 0.8 <CT1 / CT7<2.2。

[0008] In one embodiment, the center thickness CT6 of the sixth lens on the optical axis and the center thickness CT5 of the fifth lens on the optical axis may satisfy: 0.8 <CT6 / CT5<3。

[0009] In one embodiment, the effective focal length f2 of the second lens and the effective focal length f of the optical imaging lens may satisfy: <f2 / f<-1。

[0010] In one embodiment, the edge thickness ET7 of the seventh lens, the edge thickness ET6 of the sixth lens, and the edge thickness ET8 of the eighth lens may satisfy the following conditions: 0.1 <ET7 / (ET6+ET8)<1.5。

[0011] In one embodiment, a distance T34 from the image side surface of the third lens to the object side surface of the fourth lens on the optical axis, a distance T12 from the image side surface of the first lens to the object side surface of the second lens on the optical axis, a distance T23 from the image side surface of the second lens to the object side surface of the third lens on the optical axis, and a distance T45 from the image side surface of the fourth lens to the object side surface of the fifth lens on the optical axis may satisfy the following: 0.91≤T34 / (T12+T23+T45)<2.5.

[0012] In one embodiment, the eighth lens has a negative optical power, and the half of the diagonal length ImgH of the effective pixel area on the imaging surface of the optical imaging lens and the half of the maximum field of view Semi-FOV of the optical imaging lens can satisfy: 4.10mm <ImgH / tan(Semi-FOV)<8mm。

[0013] In one embodiment, the distance TTL from the object-side surface of the first lens to the imaging surface of the optical imaging lens along the optical axis and the effective focal length f of the optical imaging lens may satisfy the following: TTL / f<1.5.

[0014] In one embodiment, the first lens has positive optical power, and the effective focal length f7 of the seventh lens and the effective focal length f of the optical imaging lens can satisfy: <f7 / f<4。

[0015] In one embodiment, the curvature radius R5 of the object side surface of the third lens, the curvature radius R6 of the image side surface of the third lens, the curvature radius R7 of the object side surface of the fourth lens, and the curvature radius R8 of the image side surface of the fourth lens may satisfy: 0<1 / (R5 / R6+R7 / R8)<1.5.

[0016] In one embodiment, the edge thickness ET1 of the first lens and the center thickness CT1 of the first lens on the optical axis may satisfy: <ET1 / CT1<0.8。

[0017] In one embodiment, at least one of the first to eighth lenses may be a glass lens, and at least two of the first to eighth lenses may be plastic lenses having a refractive index greater than 1.50.

[0018] In one embodiment, the center thickness CT1 of the first lens on the optical axis and the center thickness CT7 of the seventh lens on the optical axis may satisfy: 1 <CT1 / CT7<2。

[0019] In one embodiment, the effective focal length f1 of the first lens and the effective focal length f of the optical imaging lens may satisfy: f1 / f>0.5.

[0020] This application adopts an eight-lens architecture. According to the implementation method of this application, by reasonably controlling the ratio of the distance from the object side of the first lens to the imaging plane along the optical axis to half the diagonal length of the effective pixel area on the imaging plane, reasonably constraining the range of the product of the distance from the object side of the first lens to the imaging plane along the optical axis and the entrance pupil diameter of the optical imaging lens, and by setting the sixth lens to have positive focal power, the object side of the third lens to be convex, the object side of the fourth lens to be concave, the image side of the sixth lens to be convex, and the object side and image side of the eighth lens to be concave, it is beneficial to ensure that the optical system has the largest possible light aperture under the premise of being ultra-thin, thereby improving the imaging quality of the optical system. This is beneficial to achieving the characteristics of an optical imaging lens with an ultra-thin and large image surface, and can better meet the application requirements of the main camera on the next generation of high-end smartphones.

[0021] In addition, according to some embodiments of the present application, by reasonably setting the parameters such as the focal length, radius of curvature, center thickness and edge thickness of each lens, it helps to ensure that the thickness of each lens in the optical system is uniform, improve the machinability of the optical system, reduce the difficulty of molding, reduce the sensitivity of the optical system, and improve the production yield. Under the premise of controlling costs, it is conducive to better balancing the system chromatic aberration and correcting the system aberration, thereby improving the imaging quality of the lens. It helps to achieve the characteristics of the optical system with a large field of view, a large image surface, etc., while taking into account the advantages of high performance and miniaturization. Moreover, by reasonably allocating the air space between each adjacent lens, so that each lens is in a relatively reasonable position, it is possible to reduce the sensitivity between each lens while improving the assembly stability, which helps to improve the yield. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Other features, purposes and advantages of the present application will become more apparent through the following detailed description of non-limiting embodiments in conjunction with the accompanying drawings. In the accompanying drawings:

[0023] Figure 1 1 shows a schematic structural diagram of an optical imaging lens according to Example 1 of the present application;

[0024] Figures 2A to 2D axial chromatic aberration curve, astigmatism curve, distortion curve, and lateral chromatic aberration curve of the optical imaging lens of Example 1 are respectively shown;

[0025] Figure 3 1 shows a schematic structural diagram of an optical imaging lens according to Example 2 of the present application;

[0026] Figures 4A to 4D axial chromatic aberration curve, astigmatism curve, distortion curve, and lateral chromatic aberration curve of the optical imaging lens of Example 2 are respectively shown;

[0027] Figure 5 1 shows a schematic structural diagram of an optical imaging lens according to Example 3 of the present application;

[0028] 6A to 6D axial chromatic aberration curve, astigmatism curve, distortion curve, and lateral chromatic aberration curve of the optical imaging lens of Example 3 are respectively shown;

[0029] Figure 7 1 shows a schematic structural diagram of an optical imaging lens according to Example 4 of the present application;

[0030] Figures 8A to 8D axial chromatic aberration curve, astigmatism curve, distortion curve, and lateral chromatic aberration curve of the optical imaging lens of Example 4 are respectively shown;

[0031] Figure 9 1 shows a schematic structural diagram of an optical imaging lens according to Example 5 of the present application;

[0032] 10A to 10D axial chromatic aberration curve, astigmatism curve, distortion curve, and lateral chromatic aberration curve of the optical imaging lens of Example 5 are respectively shown;

[0033] Figure 11 1 shows a schematic structural diagram of an optical imaging lens according to Example 6 of the present application;

[0034] 12A to 12D axial chromatic aberration curve, astigmatism curve, distortion curve, and lateral chromatic aberration curve of the optical imaging lens of Example 6 are respectively shown;

[0035] Figure 13 shows a schematic structural diagram of an optical imaging lens according to Example 7 of the present application; and

[0036] 14A to 14D The axial chromatic aberration curve, astigmatism curve, distortion curve and lateral chromatic aberration curve of the optical imaging lens of Example 7 are respectively shown. DETAILED DESCRIPTION

[0037] For a better understanding of the present application, various aspects of the present application will be described in more detail with reference to the accompanying drawings. It should be understood that these detailed descriptions are merely 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.

[0038] It should be noted that in this specification, the terms "first," "second," "third," etc., are used solely to distinguish one feature from another and do not limit the features. Thus, the first lens discussed below could also be referred to as the second lens or the third lens without departing from the teachings of this application.

[0039] In the drawings, the thickness, size, and shape of the lenses are slightly exaggerated for ease of illustration. Specifically, the shapes of the spherical and aspherical surfaces shown in the drawings are provided by way of example. That is, the shapes of the spherical and aspherical surfaces are not limited to those shown in the drawings. The drawings are for illustration only and are not drawn strictly to scale.

[0040] In this document, the paraxial region refers to the area near the optical axis. If a lens surface is convex and the location of the convex surface is undefined, it means that the lens surface is convex at least in the paraxial region. If a lens surface is concave and the location of the concave surface is undefined, it means that the lens surface is concave at least in the paraxial region. In this document, the surface of each lens closest to the subject is called the object-side surface of the lens, and the surface of each lens closest to the imaging plane is called the image-side surface of the lens.

[0041] 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 preclude 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 list of 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.

[0042] Unless otherwise defined, all terms used herein (including technical and scientific terms) have the same meaning as commonly understood by those skilled in the art to which this application belongs. It should also be understood that terms (such as those defined in commonly used dictionaries) should be interpreted as having a meaning consistent with their meaning in the context of the relevant technology and will not be interpreted in an idealized or overly formal sense unless expressly defined as such herein.

[0043] It should be noted that, in the absence of conflict, the embodiments and features of the embodiments in this 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.

[0044] The features, principles and other aspects of the present application are described in detail below.

[0045] An optical imaging lens according to an exemplary embodiment of the present application may include, for example, eight lenses, namely, a first lens, a second lens, a third lens, a fourth lens, a fifth lens, a sixth lens, a seventh lens, and an eighth lens. These eight lenses are arranged in order from the object side to the image side along the optical axis.

[0046] In an exemplary embodiment, the first lens may have positive or negative optical power; the second lens may have positive or negative optical power; the third lens may have positive or negative optical power; the fourth lens may have positive or negative optical power; the fifth lens may have positive or negative optical power; the sixth lens may have positive optical power; the seventh lens may have positive optical power; and the eighth lens may have positive or negative optical power.

[0047] In an exemplary embodiment, the object-side surface of the third lens may be convex; the object-side surface of the fourth lens may be concave; the image-side surface of the sixth lens may be convex; and the object-side surface and image-side surface of the eighth lens may be concave.

[0048] In an exemplary embodiment, the optical imaging lens of the present application can satisfy the conditional formula TTL / ImgH≤1.26, where TTL is the distance along the optical axis from the object side surface of the first lens to the imaging surface of the optical imaging lens, and ImgH is half of the diagonal length of the effective pixel area on the imaging surface. By controlling the ratio of the distance along the optical axis from the object side surface of the first lens to the imaging surface of the optical imaging lens to half of the diagonal length of the effective pixel area on the imaging surface within this range, it is beneficial to achieve the characteristics of ultra-thinness and high pixels of the optical imaging lens.

[0049] In an exemplary embodiment, the optical imaging lens of the present application can satisfy the conditional formula 6mm 2 <TTL×EPD<28mm 2 , where TTL is the distance along the optical axis from the object side surface of the first lens to the imaging surface, and EPD is the entrance pupil diameter of the optical imaging lens. By controlling the product of the distance along the optical axis from the object side surface of the first lens to the imaging surface and the entrance pupil diameter of the optical imaging lens within this range, it is beneficial to ensure a尽可能 large light passing aperture while the optical system is ultra-thin, and improve the imaging quality of the optical system. More specifically, TTL and EPD can satisfy: 10mm 2 <TTL×EPD<20mm 2 .

[0050] In an exemplary embodiment, the optical imaging lens of the present application can satisfy the conditional formula 2.7<f3 / f<6, where f3 is the effective focal length of the third lens and f is the effective focal length of the optical imaging lens. By controlling the ratio of the effective focal length of the third lens to the effective focal length of the optical imaging lens within this range, it helps to reduce the sensitivity of the third lens, thereby reducing the assembly difficulty. More specifically, f3 and f can satisfy: 3.5<f3 / f<5.5.

[0051] In an exemplary embodiment, the optical imaging lens of the present application can satisfy the conditional formula -2<f8 / (R15+R16)<0, where f8 is the effective focal length of the eighth lens, R15 is the curvature radius of the object side surface of the eighth lens, and R16 is the curvature radius of the image side surface of the eighth lens. By controlling the ratio of the effective focal length of the eighth lens to the sum of the curvature radius of the object side surface of the eighth lens and the curvature radius of the image side surface of the eighth lens within this range, it is beneficial to ensure that the eighth lens has a better shape and reduce the molding difficulty. More specifically, f8, R15 and R16 can satisfy: -1.5<f8 / (R15+R16)<-0.3.

[0052] In an exemplary embodiment, the optical imaging lens of the present application can satisfy the conditional formula 0.8 < CT1 / CT7 < 2.2, where CT1 is the central thickness of the first lens on the optical axis, and CT7 is the central thickness of the seventh lens on the optical axis. By controlling the ratio of the central thickness of the first lens on the optical axis to the central thickness of the seventh lens on the optical axis within this range, it helps to ensure that the lens thicknesses of each lens in the optical system are uniform, improve the processability of the optical system, reduce the sensitivity of the optical system, and increase the production yield. More specifically, CT1 and CT7 can satisfy: 1 < CT1 / CT7 < 2.

[0053] In an exemplary embodiment, the optical imaging lens of the present application can satisfy the conditional formula 0.8 < CT6 / CT5 < 3, where CT6 is the central thickness of the sixth lens on the optical axis, and CT5 is the central thickness of the fifth lens on the optical axis. By controlling the ratio of the central thickness of the sixth lens on the optical axis to the central thickness of the fifth lens on the optical axis within this range, it is beneficial to ensure the exit and entrance angles of light between the two lenses, make the light path smoother, and reduce the lens sensitivity. More specifically, CT6 and CT5 can satisfy: 1 < CT6 / CT5 < 2.

[0054] In an exemplary embodiment, the optical imaging lens of the present application can satisfy the conditional formula -4 < f2 / f < -1, where f2 is the effective focal length of the second lens, and f is the effective focal length of the optical imaging lens. By controlling the ratio of the effective focal length of the second lens to the effective focal length of the optical imaging lens within this range, it helps the optical system to have a large field of view while taking into account the advantages of high performance. More specifically, f2 and f can satisfy: -3 < f2 / f < -2.

[0055] In an exemplary embodiment, the optical imaging lens of the present application can satisfy the conditional formula 0.1 < ET7 / (ET6 + ET8) < 1.5, where ET7 is the edge thickness of the seventh lens, ET6 is the edge thickness of the sixth lens, and ET8 is the edge thickness of the eighth lens. By controlling the ratio of the edge thickness of the seventh lens to the sum of the edge thicknesses of the sixth and eighth lenses within this range, it helps to improve the self-strength of the sixth, seventh, and eighth lenses and reduce the lens forming difficulty.

[0056] In an exemplary embodiment, the optical imaging lens of the present application may satisfy the conditional formula 0.91 ≤ T34 / (T12 + T23 + T45) < 2.5, where T34 is the distance on the optical axis from the image side of the third lens to the object side of the fourth lens, T12 is the distance on the optical axis from the image side of the first lens to the object side of the second lens, T23 is the distance on the optical axis from the image side of the second lens to the object side of the third lens, and T45 is the distance on the optical axis from the image side of the fourth lens to the object side of the fifth lens. By controlling the ratio of the distance on the optical axis from the image side of the third lens to the object side of the fourth lens to the sum of the distances on the optical axis from the image side of the first lens to the object side of the second lens, from the image side of the second lens to the object side of the third lens, and from the image side of the fourth lens to the object side of the fifth lens within this range, the air gaps between the respective lenses are reasonably distributed, enabling each lens to be in a relatively reasonable position. While improving the assembly stability, the sensitivity between the lenses is also reduced, contributing to the improvement of the yield rate. More specifically, T34, T12, T23, and T45 may satisfy: 0.91 ≤ T34 / (T,2 + T23 + T45) < 2.

[0057] In an exemplary embodiment, the eighth lens may have a negative optical power, and the optical imaging lens of the present application may satisfy the conditional formula 4.10 mm < ImgH / tan(Semi - FOV) < 8 mm, where ImgH is half of the diagonal length of the effective pixel region on the imaging surface of the optical imaging lens, and Semi - FOV is half of the maximum field angle of the optical imaging lens. By controlling the ratio of half of the diagonal length of the effective pixel region on the imaging surface of the optical imaging lens to the tangent value of half of the maximum field angle of the optical imaging lens within this range, and by constraining the optical powers of the seventh and eighth lenses, the light rays emerging from the seventh lens can reach a large image height after being refracted by the eighth lens, fulfilling the requirement of a large image surface. More specifically, ImgH and Semi - FOV may satisfy: 4.5 mm < ImgH / tan(Semi - FOV) < 7 mm. For example, 5 mm < ImgH / tan(Semi - FOV) < 6 mm.

[0058] In an exemplary embodiment, the optical imaging lens of the present application may satisfy the conditional formula TTL / f < 1.5, where TTL is the distance along the optical axis from the object side of the first lens to the imaging surface of the optical imaging lens, and f is the effective focal length of the optical imaging lens. By controlling the ratio of the distance along the optical axis from the object side of the first lens to the imaging surface of the optical imaging lens to the effective focal length of the optical imaging lens within this range, while ensuring the miniaturization of the optical system, a suitable field angle can be taken into account.

[0059] In an exemplary embodiment, the first lens may have a positive optical power, and the optical imaging lens of the present application may satisfy the conditional formula 0 < f7 / f < 4, where f7 is the effective focal length of the seventh lens and f is the effective focal length of the optical imaging lens. By controlling the first lens to have a positive optical power, it helps to improve the imaging quality of the optical system. At the same time, by restricting the ratio of the seventh lens to the system focal length, it is beneficial to reduce the sensitivity of the seventh lens itself and improve the assembly efficiency. More specifically, f7 and f may satisfy 1 < f7 / f < 3.

[0060] In an exemplary embodiment, the optical imaging lens of the present application may satisfy the conditional formula 0 < 1 / (R5 / R6 + R7 / R8) < 1.5, where R5 is the curvature radius of the object side of the third lens, R6 is the curvature radius of the image side of the third lens, R7 is the curvature radius of the object side of the fourth lens, and R8 is the curvature radius of the image side of the fourth lens. By controlling the curvature radius of the object side of the third lens, the curvature radius of the image side of the third lens, the curvature radius of the object side of the fourth lens, and the curvature radius of the image side of the fourth lens to satisfy 0 < 1 / (R5 / R6 + R7 / R8) < 1.5, it can ensure that the two lenses have relatively symmetrical shapes, which is beneficial to improving the molding efficiency.

[0061] In an exemplary embodiment, the optical imaging lens of the present application may satisfy the conditional formula 0 < ET1 / CT1 < 0.8, where ET1 is the edge thickness of the first lens and CT1 is the central thickness of the first lens on the optical axis. By controlling the ratio of the edge thickness of the first lens to the central thickness of the first lens on the optical axis within this range, it helps to ensure the processability of the first lens.

[0062] Among the first lens to the eighth lens in an exemplary embodiment, at least one lens may be a glass lens, and at least two lenses may be plastic lenses with a refractive index greater than 1.50. By using at least one glass lens and at least two plastic lenses with a refractive index greater than 1.50, on the premise of controlling the cost, it is beneficial to better balance the chromatic aberration of the system and correct the system aberration, thereby improving the imaging quality of the lens.

[0063] In an exemplary embodiment, the optical imaging lens of the present application may satisfy the conditional formula f1 / f > 0.5, where f1 is the effective focal length of the first lens and f is the effective focal length of the optical imaging lens. By controlling the ratio of the effective focal length of the first lens to the effective focal length of the optical imaging lens within this range, it is beneficial to more reasonably control the trend of light passing through the first lens and improve the aberration correction ability of the optical system. More specifically, f1 and f may satisfy f1 / f > 0.8.

[0064] In exemplary embodiments, the optical imaging lens of the present application may include at least one aperture. The aperture can constrain the optical path and control the intensity of the light. The aperture can be positioned appropriately within the optical imaging lens, for example, between the object side and the first lens element.

[0065] In an exemplary embodiment, optionally, 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.

[0066] The optical imaging lens according to the above-mentioned embodiment of the present application can use multiple lenses, such as the eight lenses described above. By reasonably controlling the ratio of the distance along the optical axis from the object side of the first lens to the imaging plane to half the diagonal length of the effective pixel area on the imaging plane, reasonably constraining the range of the product of the distance along the optical axis from the object side of the first lens to the imaging plane and the entrance pupil diameter of the optical imaging lens, and by setting the sixth lens to have positive focal power, the third lens to have a convex object side, the fourth lens to have a concave object side, the sixth lens to have a convex image side, and the eighth lens to have both a concave object side and an image side, it is beneficial to ensure that the optical system has the largest possible clear aperture while being ultra-thin, thereby improving the imaging quality of the optical system. This is conducive to achieving the characteristics of an ultra-thin optical imaging lens with a large image surface, and can better meet the application requirements of main cameras in next-generation high-end smartphones, for example.

[0067] In addition, according to the embodiments of the present application, by reasonably setting the parameters such as the focal length, radius of curvature, center thickness and edge thickness of each lens, it helps to ensure that the thickness of each lens in the optical system is uniform, improve the machinability of the optical system, reduce the difficulty of molding, reduce the sensitivity of the optical system, and improve the production yield. Under the premise of controlling costs, it is conducive to better balancing the system chromatic aberration and correcting the system aberration, thereby improving the imaging quality of the lens. It helps to achieve the characteristics of the optical system such as a large field of view and a large image surface while taking into account the advantages of high performance and miniaturization. Moreover, by reasonably allocating the air space between adjacent lenses, so that each lens is in a relatively reasonable position, it is possible to reduce the sensitivity between each lens while improving the assembly stability, which helps to improve the yield.

[0068] In an embodiment of the present application, at least one aspherical mirror surface may be included in the mirror surfaces of the first lens, the second lens, the third lens, the fourth lens, the fifth lens, the sixth lens, the seventh lens and the eighth lens, that is, at least one aspherical mirror surface may be included from the object side surface of the first lens to the image side surface of the eighth lens. 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 with 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 that occurs during imaging can be eliminated as much as possible, thereby improving the imaging quality. Optionally, at least one of the object side surface and the image side surface of each lens in the first lens, the second lens, the third lens, the fourth lens, the fifth lens, the sixth lens, the seventh lens and the eighth lens is an aspherical mirror surface. Optionally, the object-side surface and the image-side surface of each of the first lens, the second lens, the third lens, the fourth lens, the fifth lens, the sixth lens, the seventh lens and the eighth lens are aspherical mirror surfaces.

[0069] However, those skilled in the art will appreciate that the number of lenses comprising the optical imaging lens can be varied to achieve the various results and advantages described herein without departing from the claimed technical solutions. For example, while eight lenses are described in the embodiments, the optical imaging lens is not limited to eight lenses. If desired, the optical imaging lens may also include other numbers of lenses.

[0070] Specific embodiments of the optical imaging lens applicable to the above-mentioned embodiments will be further described below with reference to the accompanying drawings.

[0071] Example 1

[0072] The following reference Figures 1 to 2D The optical imaging lens according to Example 1 of the present application is described. Figure 1 A schematic structural diagram of an optical imaging lens according to Example 1 of the present application is shown.

[0073] like Figure 1 As shown, the optical imaging lens includes, from the object side to the image side along the optical axis, an aperture STO, a first lens E1, a second lens E2, a third lens E3, a fourth lens E4, a fifth lens E5, a sixth lens E6, a seventh lens E7, an eighth lens E8 and a filter E9.

[0074] The first lens E1 has positive focal power, with its object-side surface S1 being convex and its image-side surface S2 being concave. The second lens E2 has negative focal power, with its object-side surface S3 being convex and its image-side surface S4 being concave. The third lens E3 has positive focal power, with its object-side surface S5 being convex and its image-side surface S6 being concave. The fourth lens E4 has positive focal power, with its object-side surface S7 being concave and its image-side surface S8 being convex. The fifth lens E5 has negative focal power, with its object-side surface S9 being convex and its image-side surface S10 being concave. The sixth lens E6 has positive focal power, with its object-side surface S11 being concave and its image-side surface S12 being convex. The seventh lens E7 has positive focal power, with its object-side surface S13 being convex and its image-side surface S14 being concave. The eighth lens E8 has negative focal power, with its object-side surface S15 being concave and its image-side surface S16 being concave. The filter E9 has an object-side surface S17 and an image-side surface S18. The optical imaging lens has an imaging surface S19. Light from an object passes through each surface S1 to S18 in sequence and is finally imaged on the imaging surface S19.

[0075] Table 1 shows the basic parameters of the optical imaging lens of Example 1, wherein the units of curvature radius and thickness / distance are all millimeters (mm).

[0076]

[0077] Table 1

[0078] In Example 1, the object-side surface and the image-side surface of any lens from the first lens E1 to the eighth lens E8 are both aspherical surfaces. The surface shape x of each aspherical lens can be defined by, but is not limited to, the following aspherical surface formula:

[0079]

[0080] Wherein, x is the distance vector height of the aspheric surface from the vertex of the aspheric surface at a height of h along the optical axis; c is the paraxial curvature of the aspheric surface, c = 1 / R (i.e., the paraxial curvature c is the reciprocal of the curvature radius R in Table 1 above); k is the conic coefficient; Ai is the correction coefficient of the i-th order of the aspheric 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, A80, A59, A61, A76, A80, A90, A10, A11, A12, A13, A14, A15 10 、A 12 、A 14 、A 16 、A 18 and A 20 .

[0081] Face number A4 A6 A8 A10 A12 S1 -1.5143E-03 -3.5540E-03 -1.4120E-03 -4.0644E-04 -1.0949E-04 S2 -2.0060E-02 3.6967E-03 -3.9354E-04 -1.1812E-04 8.4005E-05 S3 1.0980E-02 8.7440E-03 -3.2769E-04 1.0505E-04 2.3879E-04 S4 4.7917E-02 7.3557E-03 -2.8072E-05 -3.7724E-04 -1.4976E-04 S5 -6.8297E-03 1.4659E-02 4.8207E-03 5.1215E-04 -1.5588E-04 S6 9.9371E-03 1.6810E-02 6.7552E-03 1.9048E-03 4.3208E-04 S7 -1.3019E-01 -1.7948E-02 6.6208E-04 2.3382E-04 1.4335E-04 S8 -2.0779E-01 -2.7516E-02 2.8632E-03 -1.1534E-04 1.6624E-04 S9 -2.9726E-01 4.4419E-04 -6.1077E-03 -4.5825E-03 -7.4672E-04 S10 -4.1699E-01 3.5703E-02 -4.1178E-03 -2.6492E-03 -4.5546E-04 S11 -5.4658E-01 -2.9178E-02 3.2215E-02 1.1270E-02 4.5384E-03 S12 -4.1511E-01 9.4967E-02 5.8520E-03 -8.8227E-03 2.8287E-03 S13 -2.6649E+00 6.1684E-01 -3.8042E-03 -4.7587E-02 7.6749E-03 S14 -1.6071E+00 1.8321E-01 5.1580E-02 -1.0087E-02 3.5502E-02 S15 1.5140E+00 1.0113E-01 -1.4784E-01 5.8143E-02 -2.1674E-02 S16 -3.1187E+00 6.3515E-01 4.0694E-03 6.9762E-03 -5.6381E-02

[0082] Table 2-1

[0083] Face number A14 A16 A18 A20 S1 -2.0951E-05 -3.8631E-06 0.0000E+00 0.0000E+00 S2 3.2188E-07 0.0000E+00 0.0000E+00 0.0000E+00 S3 5.5411E-05 1.6835E-05 0.0000E+00 0.0000E+00 S4 -4.3051E-05 -4.6406E-08 0.0000E+00 0.0000E+00 S5 -1.0444E-04 -8.3859E-06 2.5806E-06 5.0360E-06 S6 1.0035E-04 8.3151E-06 -1.3319E-06 -1.0798E-05 S7 -6.4200E-05 2.7460E-05 7.5550E-06 1.0387E-05 S8 -2.5288E-04 2.0284E-04 5.6608E-05 1.7859E-05 S9 -4.4398E-04 7.0784E-04 9.4978E-05 1.0433E-05 S10 -5.9928E-04 8.1256E-04 -5.8515E-05 -2.9650E-06 S11 -1.0444E-03 -1.4070E-03 -6.7134E-04 -5.2881E-06 S12 1.8560E-03 -6.8168E-04 -6.4380E-04 1.8899E-04 S13 -1.6069E-03 4.6330E-03 -1.2242E-03 -4.8203E-04 S14 -1.2454E-02 3.7013E-03 -4.1090E-03 -3.8330E-04 S15 -9.8272E-03 1.0936E-02 -5.2971E-03 2.3986E-03 S16 -7.8026E-03 -1.3561E-03 2.6855E-03 3.9728E-03

[0084] Table 2-2

[0085] Figure 2A The axial chromatic aberration curve of the optical imaging lens of Example 1 is shown, which indicates the deviation of the convergent focus of light of different wavelengths passing through the lens. Figure 2B The astigmatism curve of the optical imaging lens of Example 1 is shown, which represents the meridional field curvature and the sagittal field curvature. Figure 2C The distortion curve of the optical imaging lens of Example 1 is shown, which represents the distortion magnitude values ​​corresponding to different image heights. Figure 2D The chromatic aberration curve of the optical imaging lens of Example 1 is shown, which represents the deviation of different image heights on the imaging surface after the light passes through the lens. Figures 2A to 2D It can be seen that the optical imaging lens provided in Example 1 can achieve good imaging quality.

[0086] Example 2

[0087] The following reference Figures 3 to 4D The optical imaging lens according to Example 2 of the present application is described. In this embodiment and the following embodiments, for the sake of brevity, some descriptions similar to Example 1 will be omitted. Figure 3 A schematic structural diagram of an optical imaging lens according to Example 2 of the present application is shown.

[0088] like Figure 3 As shown, the optical imaging lens includes, from the object side to the image side along the optical axis, an aperture STO, a first lens E1, a second lens E2, a third lens E3, a fourth lens E4, a fifth lens E5, a sixth lens E6, a seventh lens E7, an eighth lens E8 and a filter E9.

[0089] The first lens E1 has positive focal power, with its object-side surface S1 being convex and its image-side surface S2 being concave. The second lens E2 has negative focal power, with its object-side surface S3 being convex and its image-side surface S4 being concave. The third lens E3 has positive focal power, with its object-side surface S5 being convex and its image-side surface S6 being concave. The fourth lens E4 has positive focal power, with its object-side surface S7 being concave and its image-side surface S8 being convex. The fifth lens E5 has negative focal power, with its object-side surface S9 being concave and its image-side surface S10 being concave. The sixth lens E6 has positive focal power, with its object-side surface S11 being concave and its image-side surface S12 being convex. The seventh lens E7 has positive focal power, with its object-side surface S13 being convex and its image-side surface S14 being concave. The eighth lens E8 has negative focal power, with its object-side surface S15 being concave and its image-side surface S16 being concave. The filter E9 has an object-side surface S17 and an image-side surface S18. The optical imaging lens has an imaging surface S19. Light from an object passes through each surface S1 to S18 in sequence and is finally imaged on the imaging surface S19.

[0090] Table 3 shows the basic parameters of the optical imaging lens of Example 2, where the units of curvature radius and thickness / distance are all in millimeters (mm). Tables 4-1 and 4-2 show 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 10 、A 12 、A 14 、A 16 、A 18 and A 20 , wherein each aspheric surface shape can be defined by formula (1) given in the above embodiment 1.

[0091]

[0092] Table 3

[0093] Face number A4 A6 A8 A10 A12 S1 1.6798E-03 -1.3378E-03 -8.1941E-04 -2.7160E-04 -8.8264E-05 S2 -1.4453E-02 2.8138E-03 -8.7285E-04 4.1328E-04 4.6124E-05 S3 1.0503E-02 6.3753E-03 -5.5875E-04 8.8850E-04 1.7166E-04 S4 5.1760E-02 9.1831E-03 1.0322E-04 6.2749E-05 -1.0328E-04 S5 -9.0646E-04 1.8148E-02 3.9451E-03 -2.0704E-04 -4.6316E-04 S6 2.6965E-02 2.5099E-02 7.8587E-03 1.5752E-03 -5.6068E-07 S7 -1.4561E-01 -1.3367E-02 2.4104E-03 1.2397E-03 3.6203E-04 S8 -2.4477E-01 -2.6813E-02 3.1128E-03 8.1955E-04 1.4660E-04 S9 -3.1040E-01 2.7052E-03 -2.4158E-03 -2.4253E-03 -2.9856E-04 S10 -3.9345E-01 4.0638E-02 5.7049E-03 1.4938E-03 9.8969E-04 S11 -5.0521E-01 -4.0708E-02 2.6073E-02 6.5192E-03 4.9070E-03 S12 -4.5233E-01 8.8168E-02 -6.6906E-03 -1.5942E-02 1.9577E-03 S13 -3.2074E+00 9.1800E-01 -1.4260E-01 -6.2041E-02 4.4894E-02 S14 -1.6742E+00 3.3140E-01 3.8415E-02 -4.2753E-02 1.6488E-02 S15 1.2477E+00 6.8449E-03 -1.3333E-01 5.9667E-02 -2.8075E-02 S16 -2.9496E+00 3.7663E-01 -3.0823E-02 2.8317E-02 -3.4985E-02

[0094] Table 4-1

[0095] Face number A14 A16 A18 A20 S1 -7.1291E-07 3.4811E-06 0.0000E+00 0.0000E+00 S2 3.4685E-05 -8.6223E-05 0.0000E+00 0.0000E+00 S3 1.6157E-05 -1.0257E-04 0.0000E+00 0.0000E+00 S4 -3.8283E-05 -4.8859E-05 0.0000E+00 0.0000E+00 S5 -2.0841E-04 -5.5535E-05 -2.0005E-05 5.6165E-06 S6 -1.2656E-04 -1.0157E-04 -4.1544E-05 -2.9220E-05 S7 3.4617E-05 6.0382E-06 -1.2244E-06 -5.9341E-06 S8 -2.5833E-04 7.9764E-05 4.1468E-05 2.7372E-05 S9 -8.0076E-04 2.6855E-04 1.6345E-04 4.7809E-05 S10 -1.8783E-03 -1.0965E-04 -1.1618E-05 1.5269E-05 S11 1.9368E-04 -1.2841E-03 -7.3360E-04 -5.2286E-05 S12 3.2939E-03 -6.4106E-04 -3.7427E-04 3.0315E-04 S13 -1.1300E-02 -1.7076E-03 1.0767E-03 1.1999E-04 S14 -2.6143E-02 1.1595E-02 -1.8596E-03 5.7997E-04 S15 1.2722E-04 7.2663E-03 -4.8677E-03 2.0435E-03 S16 -1.3667E-03 -6.2371E-04 4.1236E-04 1.1795E-03

[0096] Table 4-2

[0097] Figure 4A The axial chromatic aberration curve of the optical imaging lens of Example 2 is shown, which indicates the deviation of the convergent focus of light of different wavelengths passing through the lens. Figure 4B The astigmatism curve of the optical imaging lens of Example 2 is shown, which represents the meridional field curvature and the sagittal field curvature. Figure 4C The distortion curve of the optical imaging lens of Example 2 is shown, which represents the distortion magnitude values ​​corresponding to different image heights. Figure 4D The chromatic aberration curve of the optical imaging lens of Example 2 is shown, which represents the deviation of different image heights on the imaging surface after the light passes through the lens. Figures 4A to 4D It can be seen that the optical imaging lens provided in Example 2 can achieve good imaging quality.

[0098] Example 3

[0099] The following reference Figures 5 to 6D An optical imaging lens according to Example 3 of the present application is described. Figure 5 A schematic structural diagram of an optical imaging lens according to Example 3 of the present application is shown.

[0100] like Figure 5 As shown, the optical imaging lens includes, from the object side to the image side along the optical axis, an aperture STO, a first lens E1, a second lens E2, a third lens E3, a fourth lens E4, a fifth lens E5, a sixth lens E6, a seventh lens E7, an eighth lens E8 and a filter E9.

[0101] The first lens E1 has positive focal power, with its object-side surface S1 being convex and its image-side surface S2 being concave. The second lens E2 has negative focal power, with its object-side surface S3 being convex and its image-side surface S4 being concave. The third lens E3 has positive focal power, with its object-side surface S5 being convex and its image-side surface S6 being concave. The fourth lens E4 has negative focal power, with its object-side surface S7 being concave and its image-side surface S8 being convex. The fifth lens E5 has positive focal power, with its object-side surface S9 being convex and its image-side surface S10 being convex. The sixth lens E6 has positive focal power, with its object-side surface S11 being concave and its image-side surface S12 being convex. The seventh lens E7 has positive focal power, with its object-side surface S13 being convex and its image-side surface S14 being concave. The eighth lens E8 has negative focal power, with its object-side surface S15 being concave and its image-side surface S16 being concave. The filter E9 has an object-side surface S17 and an image-side surface S18. The optical imaging lens has an imaging surface S19. Light from an object passes through each surface S1 to S18 in sequence and is finally imaged on the imaging surface S19.

[0102] Table 5 shows the basic parameters of the optical imaging lens of Example 3, where the units of curvature radius and thickness / distance are all in millimeters (mm). Tables 6-1 and 6-2 show 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 10 、A 12 、A 14 、A 16 、A 18 and A 20 , wherein each aspheric surface shape can be defined by formula (1) given in the above embodiment 1.

[0103]

[0104] Table 5

[0105]

[0106]

[0107] Table 6-1

[0108] Face number A14 A16 A18 A20 S1 4.7663E-05 2.0820E-05 0.0000E+00 0.0000E+00 S2 8.4201E-05 -5.1413E-05 0.0000E+00 0.0000E+00 S3 8.3401E-05 -5.8730E-05 0.0000E+00 0.0000E+00 S4 -4.2900E-05 -4.1409E-05 0.0000E+00 0.0000E+00 S5 -2.4081E-04 -6.8950E-05 -1.4730E-05 4.1575E-06 S6 -1.6669E-04 -1.0144E-04 -1.8038E-05 -1.1681E-05 S7 -3.9064E-05 -2.0445E-05 -1.4350E-05 -1.1918E-06 S8 -4.5593E-04 9.7067E-05 5.7300E-05 5.1493E-05 S9 -1.4596E-03 2.9009E-04 1.4501E-04 9.1346E-05 S10 -3.4472E-03 3.1321E-04 1.2677E-04 1.4246E-04 S11 -2.1536E-03 -1.8225E-03 -8.0988E-04 -4.3084E-05 S12 7.0418E-04 -3.1920E-04 -3.4742E-06 2.9502E-04 S13 -2.9202E-02 2.4160E-03 3.9206E-03 -1.1615E-03 S14 -1.4925E-02 1.4352E-02 -4.1204E-03 4.8829E-04 S15 2.5411E-02 -6.9745E-03 6.3978E-03 -1.4931E-04 S16 -1.4183E-03 -2.6445E-02 -5.6195E-03 -5.5918E-03

[0109] Table 6-2

[0110] Figure 6A The axial chromatic aberration curve of the optical imaging lens of Example 3 is shown, which indicates the deviation of the convergent focus of light of different wavelengths passing through the lens. Figure 6B The astigmatism curve of the optical imaging lens of Example 3 is shown, which represents the meridional field curvature and the sagittal field curvature. Figure 6C The distortion curve of the optical imaging lens of Example 3 is shown, which represents the distortion values ​​corresponding to different image heights. Figure 6D The chromatic aberration curve of the optical imaging lens of Example 3 is shown, which represents the deviation of different image heights on the imaging surface after the light passes through the lens. 6A to 6D It can be seen that the optical imaging lens provided in Example 3 can achieve good imaging quality.

[0111] Example 4

[0112] The following reference Figures 7 to 8D An optical imaging lens according to Example 4 of the present application is described. Figure 7 A schematic structural diagram of an optical imaging lens according to Example 4 of the present application is shown.

[0113] like Figure 7 As shown, the optical imaging lens includes, from the object side to the image side along the optical axis, an aperture STO, a first lens E1, a second lens E2, a third lens E3, a fourth lens E4, a fifth lens E5, a sixth lens E6, a seventh lens E7, an eighth lens E8 and a filter E9.

[0114] The first lens E1 has positive focal power, with its object-side surface S1 being convex and its image-side surface S2 being concave. The second lens E2 has negative focal power, with its object-side surface S3 being convex and its image-side surface S4 being concave. The third lens E3 has positive focal power, with its object-side surface S5 being convex and its image-side surface S6 being concave. The fourth lens E4 has negative focal power, with its object-side surface S7 being concave and its image-side surface S8 being convex. The fifth lens E5 has positive focal power, with its object-side surface S9 being convex and its image-side surface S10 being convex. The sixth lens E6 has positive focal power, with its object-side surface S11 being convex and its image-side surface S12 being convex. The seventh lens E7 has positive focal power, with its object-side surface S13 being convex and its image-side surface S14 being concave. The eighth lens E8 has negative focal power, with its object-side surface S15 being concave and its image-side surface S16 being concave. The filter E9 has an object-side surface S17 and an image-side surface S18. The optical imaging lens has an imaging surface S19. Light from an object passes through each surface S1 to S18 in sequence and is finally imaged on the imaging surface S19.

[0115] Table 7 shows the basic parameters of the optical imaging lens of Example 4, where the units of curvature radius and thickness / distance are all in millimeters (mm). Tables 8-1 and 8-2 show 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 10 、A 12 、A 14 、A 16 、A 18 and A 20 , wherein each aspheric surface shape can be defined by formula (1) given in the above embodiment 1.

[0116]

[0117] Table 7

[0118] Face number A4 A6 A8 A10 A12 S1 -1.0029E-03 -3.1427E-03 -1.2353E-03 -3.4786E-04 -9.3185E-05 S2 -2.0353E-02 3.7977E-03 -4.1662E-04 -1.1340E-04 9.0500E-05 S3 1.0237E-02 8.4435E-03 -3.5116E-04 6.2959E-05 2.1296E-04 S4 4.8228E-02 7.3985E-03 -4.0832E-05 -3.8694E-04 -1.5329E-04 S5 -2.5864E-03 1.3500E-02 4.3764E-03 4.9744E-04 -1.2064E-04 S6 1.4591E-02 1.7595E-02 6.7540E-03 2.0582E-03 4.7667E-04 S7 -1.4147E-01 -1.2961E-02 -6.8292E-05 6.6148E-04 5.9495E-05 S8 -2.8540E-01 -1.5313E-02 1.4171E-03 5.3837E-04 -1.1028E-04 S9 -2.9130E-01 4.6823E-04 -1.8773E-03 -3.2618E-03 -8.5136E-05 S10 -2.8399E-01 1.8473E-02 5.3491E-03 -1.5655E-03 1.8112E-04 S11 -5.5200E-01 -3.8231E-02 3.2324E-02 9.7910E-03 3.2508E-03 S12 -5.1257E-01 9.6124E-02 4.0672E-03 -1.2505E-02 1.3700E-03 S13 -2.8411E+00 6.8985E-01 -4.4414E-02 -5.6756E-02 2.2289E-02 S14 -1.5340E+00 1.6034E-01 5.5627E-02 -1.5489E-02 3.2395E-02 S15 1.4421E+00 6.9169E-02 -1.4396E-01 5.7324E-02 -2.5330E-02 S16 -3.1034E+00 5.6790E-01 1.3245E-03 9.7236E-03 -5.2865E-02

[0119] Table 8-1

[0120] Face number A14 A16 A18 A20 S1 -1.7550E-05 -3.3437E-06 0.0000E+00 0.0000E+00 S2 3.5085E-07 0.0000E+00 0.0000E+00 0.0000E+00 S3 4.8436E-05 1.5350E-05 0.0000E+00 0.0000E+00 S4 -4.3780E-05 -4.7303E-08 0.0000E+00 0.0000E+00 S5 -1.0200E-04 -7.8553E-06 1.5254E-06 4.6309E-06 S6 1.2610E-04 7.7398E-06 6.3045E-06 -1.2120E-05 S7 2.9517E-05 2.0400E-05 9.4061E-06 5.7215E-06 S8 -2.8193E-06 1.5937E-04 6.9130E-05 7.9341E-06 S9 -2.8813E-04 2.6578E-04 5.9055E-05 2.7286E-05 S10 -1.4843E-03 3.4994E-05 4.3098E-05 8.3076E-05 S11 -9.1326E-04 -9.2045E-04 -4.7841E-04 3.9982E-05 S12 2.9662E-03 9.2371E-05 -5.3394E-04 1.3939E-04 S13 -1.3027E-03 1.0390E-03 -1.8331E-03 3.7654E-04 S14 -1.6025E-02 4.9075E-03 -3.9159E-03 3.7486E-04 S15 -6.0959E-03 8.6018E-03 -4.7745E-03 2.4657E-03 S16 -5.4647E-03 -2.7097E-03 1.0985E-04 3.8759E-03

[0121] Table 8-2

[0122] Figure 8A The axial chromatic aberration curve of the optical imaging lens of Example 4 is shown, which indicates the deviation of the convergent focus of light of different wavelengths passing through the lens. Figure 8B The astigmatism curve of the optical imaging lens of Example 4 is shown, which represents the meridional field curvature and the sagittal field curvature. Figure 8C The distortion curve of the optical imaging lens of Example 4 is shown, which represents the distortion magnitude values ​​corresponding to different image heights. Figure 8D The chromatic aberration curve of the optical imaging lens of Example 4 is shown, which represents the deviation of different image heights on the imaging surface after the light passes through the lens. Figures 8A to 8D It can be seen that the optical imaging lens provided in Example 4 can achieve good imaging quality.

[0123] Example 5

[0124] The following reference Figures 9 to 10D An optical imaging lens according to Example 5 of the present application is described. Figure 9 A schematic structural diagram of an optical imaging lens according to Example 5 of the present application is shown.

[0125] like Figure 9 As shown, the optical imaging lens includes, from the object side to the image side along the optical axis, an aperture STO, a first lens E1, a second lens E2, a third lens E3, a fourth lens E4, a fifth lens E5, a sixth lens E6, a seventh lens E7, an eighth lens E8 and a filter E9.

[0126] The first lens E1 has positive focal power, with its object-side surface S1 being convex and its image-side surface S2 being concave. The second lens E2 has negative focal power, with its object-side surface S3 being convex and its image-side surface S4 being concave. The third lens E3 has positive focal power, with its object-side surface S5 being convex and its image-side surface S6 being concave. The fourth lens E4 has positive focal power, with its object-side surface S7 being concave and its image-side surface S8 being convex. The fifth lens E5 has negative focal power, with its object-side surface S9 being convex and its image-side surface S10 being concave. The sixth lens E6 has positive focal power, with its object-side surface S11 being convex and its image-side surface S12 being convex. The seventh lens E7 has positive focal power, with its object-side surface S13 being convex and its image-side surface S14 being concave. The eighth lens E8 has negative focal power, with its object-side surface S15 being concave and its image-side surface S16 being concave. The filter E9 has an object-side surface S17 and an image-side surface S18. The optical imaging lens has an imaging surface S19. Light from an object passes through each surface S1 to S18 in sequence and is finally imaged on the imaging surface S19.

[0127] Table 9 shows the basic parameters of the optical imaging lens of Example 5, where the units of curvature radius and thickness / distance are all in millimeters (mm). Tables 10-1 and 10-2 show 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, A 10 、A 12 、A 14 、A 16 、A 18 and A 20 , wherein each aspheric surface shape can be defined by formula (1) given in the above embodiment 1.

[0128]

[0129] Table 9

[0130] Face number A4 A6 A8 A10 A12 S1 -1.2176E-03 -3.3164E-03 -1.3097E-03 -3.7241E-04 -1.0001E-04 S2 -2.0860E-02 3.9775E-03 -4.5556E-04 -1.0233E-04 1.0282E-04 S3 1.1014E-02 8.7579E-03 -3.2643E-04 1.0710E-04 2.4002E-04 S4 4.7154E-02 7.2494E-03 1.7482E-06 -3.5417E-04 -1.4133E-04 S5 -8.4048E-03 1.3870E-02 4.6075E-03 4.7720E-04 -1.5474E-04 S6 9.8946E-03 1.6495E-02 6.5337E-03 1.7959E-03 3.7157E-04 S7 -1.2930E-01 -1.7046E-02 6.8006E-04 2.8054E-04 1.3209E-04 S8 -2.0981E-01 -2.6995E-02 2.3103E-03 8.6992E-06 3.0936E-05 S9 -3.0009E-01 3.9185E-04 -5.9213E-03 -4.1056E-03 -1.0179E-03 S10 -4.2341E-01 3.8679E-02 -3.1390E-03 -2.4393E-03 -7.0249E-04 S11 -5.5230E-01 -2.9094E-02 2.9392E-02 1.0539E-02 4.5497E-03 S12 -4.4213E-01 8.5837E-02 7.4233E-03 -8.0677E-03 2.4271E-03 S13 -2.8475E+00 7.2028E-01 -4.2449E-02 -5.6728E-02 1.6588E-02 S14 -1.6202E+00 2.1885E-01 5.5258E-02 -1.3740E-02 3.0495E-02 S15 1.5294E+00 8.5817E-02 -1.4753E-01 5.8450E-02 -2.7243E-02 S16 -3.1548E+00 6.3647E-01 7.5886E-03 2.8327E-03 -5.6614E-02

[0131] Table 10-1

[0132]

[0133]

[0134] Table 10-2

[0135] Figure 10A The axial chromatic aberration curve of the optical imaging lens of Example 5 is shown, which indicates the deviation of the convergent focus of light of different wavelengths passing through the lens. Figure 10B The astigmatism curve of the optical imaging lens of Example 5 is shown, which represents the meridional field curvature and the sagittal field curvature. Figure 10CThe distortion curve of the optical imaging lens of Example 5 is shown, which represents the distortion magnitude values ​​corresponding to different image heights. Figure 10D The chromatic aberration curve of the optical imaging lens of Example 5 is shown, which represents the deviation of different image heights on the imaging surface after the light passes through the lens. 10A to 10D It can be seen that the optical imaging lens provided in Example 5 can achieve good imaging quality.

[0136] Example 6

[0137] The following reference Figures 11 to 12D An optical imaging lens according to Example 6 of the present application is described. Figure 11 A schematic structural diagram of an optical imaging lens according to Example 6 of the present application is shown.

[0138] like Figure 11 As shown, the optical imaging lens includes, from the object side to the image side along the optical axis, an aperture STO, a first lens E1, a second lens E2, a third lens E3, a fourth lens E4, a fifth lens E5, a sixth lens E6, a seventh lens E7, an eighth lens E8 and a filter E9.

[0139] The first lens E1 has positive focal power, with its object-side surface S1 being convex and its image-side surface S2 being concave. The second lens E2 has negative focal power, with its object-side surface S3 being convex and its image-side surface S4 being concave. The third lens E3 has positive focal power, with its object-side surface S5 being convex and its image-side surface S6 being concave. The fourth lens E4 has positive focal power, with its object-side surface S7 being concave and its image-side surface S8 being convex. The fifth lens E5 has negative focal power, with its object-side surface S9 being concave and its image-side surface S10 being concave. The sixth lens E6 has positive focal power, with its object-side surface S11 being convex and its image-side surface S12 being convex. The seventh lens E7 has positive focal power, with its object-side surface S13 being convex and its image-side surface S14 being concave. The eighth lens E8 has negative focal power, with its object-side surface S15 being concave and its image-side surface S16 being concave. The filter E9 has an object-side surface S17 and an image-side surface S18. The optical imaging lens has an imaging surface S19. Light from an object passes through each surface S1 to S18 in sequence and is finally imaged on the imaging surface S19.

[0140] Table 11 shows the basic parameters of the optical imaging lens of Example 6, where the units of curvature radius and thickness / distance are all in millimeters (mm). Tables 12-1 and 12-2 show 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, A62, A63, A64, A70, A71, A72, A73, A74, A75, A76, A77, A8 10 、A 12 、A 14 、A 16 、A 18 and A 20, wherein each aspheric surface shape can be defined by formula (1) given in the above embodiment 1.

[0141]

[0142]

[0143] Table 11

[0144] Face number A4 A6 A8 A10 A12 S1 -2.0584E-03 -3.4396E-03 -1.4076E-03 -4.0237E-04 -1.1319E-04 S2 -2.0837E-02 2.8095E-03 -7.1515E-04 1.8810E-04 -9.1478E-06 S3 1.1589E-02 7.9091E-03 -6.5712E-05 7.0370E-04 2.0579E-04 S4 5.3088E-02 8.0327E-03 -6.4171E-05 -6.4606E-05 -8.1009E-05 S5 -1.0344E-03 1.8449E-02 4.6770E-03 1.8179E-04 -3.5041E-04 S6 2.2959E-02 2.3406E-02 8.1072E-03 2.1127E-03 2.9949E-04 S7 -1.4441E-01 -1.5764E-02 1.3657E-03 9.2125E-04 2.8245E-04 S8 -2.2849E-01 -2.7730E-02 2.3920E-03 5.5360E-04 1.9974E-05 S9 -2.8498E-01 1.1111E-03 -3.7253E-03 -3.2444E-03 -1.0325E-03 S10 -3.8111E-01 3.9670E-02 2.1852E-03 5.0769E-05 4.0141E-04 S11 -5.7566E-01 -3.1177E-02 3.2364E-02 1.1516E-02 4.0868E-03 S12 -4.6961E-01 9.0496E-02 5.7696E-03 -1.1601E-02 2.1687E-04 S13 -2.8900E+00 7.4396E-01 -6.0030E-02 -6.1634E-02 2.6575E-02 S14 -1.5645E+00 2.5891E-01 5.5297E-02 -2.9621E-02 2.2426E-02 S15 1.4056E+00 5.1333E-02 -1.3450E-01 6.5127E-02 -3.0234E-02 S16 -3.0118E+00 4.8344E-01 -1.4929E-03 2.6897E-02 -3.9362E-02

[0145] Table 12-1

[0146]

[0147]

[0148] Table 12-2

[0149] Figure 12A The axial chromatic aberration curve of the optical imaging lens of Example 6 is shown, which indicates the deviation of the convergent focus of light of different wavelengths passing through the lens. Figure 12B The astigmatism curve of the optical imaging lens of Example 6 is shown, which represents the meridional field curvature and the sagittal field curvature. Figure 12C The distortion curve of the optical imaging lens of Example 6 is shown, which represents the distortion values ​​corresponding to different image heights. Figure 12D The chromatic aberration curve of the optical imaging lens of Example 6 is shown, which represents the deviation of different image heights on the imaging surface after the light passes through the lens. 12A to 12D It can be seen that the optical imaging lens provided in Example 6 can achieve good imaging quality.

[0150] Example 7

[0151] The following reference Figures 13 to 14D An optical imaging lens according to Example 7 of the present application is described. Figure 13 A schematic structural diagram of an optical imaging lens according to Example 7 of the present application is shown.

[0152] like Figure 13 As shown, the optical imaging lens includes, from the object side to the image side along the optical axis, an aperture STO, a first lens E1, a second lens E2, a third lens E3, a fourth lens E4, a fifth lens E5, a sixth lens E6, a seventh lens E7, an eighth lens E8 and a filter E9.

[0153] The first lens E1 has positive focal power, with its object-side surface S1 being convex and its image-side surface S2 being concave. The second lens E2 has negative focal power, with its object-side surface S3 being convex and its image-side surface S4 being concave. The third lens E3 has positive focal power, with its object-side surface S5 being convex and its image-side surface S6 being concave. The fourth lens E4 has positive focal power, with its object-side surface S7 being concave and its image-side surface S8 being convex. The fifth lens E5 has negative focal power, with its object-side surface S9 being convex and its image-side surface S10 being concave. The sixth lens E6 has positive focal power, with its object-side surface S11 being concave and its image-side surface S12 being convex. The seventh lens E7 has positive focal power, with its object-side surface S13 being convex and its image-side surface S14 being concave. The eighth lens E8 has negative focal power, with its object-side surface S15 being concave and its image-side surface S16 being concave. The filter E9 has an object-side surface S17 and an image-side surface S18. The optical imaging lens has an imaging surface S19. Light from an object passes through each surface S1 to S18 in sequence and is finally imaged on the imaging surface S19.

[0154] Table 13 shows the basic parameters of the optical imaging lens of Example 7, where the units of curvature radius and thickness / distance are all in millimeters (mm). Table 14-1 and Table 14-2 show 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, 10 、A 12 、A 14 、A 16 、A 18 、A 20 、A 22 、A 24 、A 26 、A 28 and A 30 , wherein each aspheric surface shape can be defined by formula (1) given in the above embodiment 1.

[0155]

[0156]

[0157] Table 13

[0158] Face number A4 A6 A8 A10 A12 A14 A16 S1 -1.9821E-03 -2.7721E-03 -1.4320E-03 -2.8842E-04 -1.3624E-04 -2.3961E-06 -7.4277E-06 S2 -2.0124E-02 3.8270E-03 -4.8702E-04 3.0813E-05 2.2217E-06 3.5608E-05 -3.3086E-05 S3 1.0451E-02 8.1876E-03 -1.4285E-04 1.0827E-04 1.6760E-04 4.5970E-05 -4.0916E-05 S4 4.6356E-02 7.5245E-03 2.3510E-04 -3.9700E-04 -1.0821E-04 -3.7511E-05 -3.7410E-05 S5 -7.9287E-03 1.3977E-02 4.4428E-03 2.7591E-04 -1.0153E-04 -2.2969E-05 2.0625E-05 S6 9.4190E-03 1.6234E-02 5.9182E-03 1.5038E-03 3.0089E-04 1.3512E-04 2.7801E-05 S7 -1.3234E-01 -1.8439E-02 3.6070E-04 -8.2625E-05 1.5436E-05 -9.1668E-05 4.0471E-05 S8 -2.0179E-01 -2.6092E-02 2.6332E-03 2.6393E-04 4.7023E-04 1.8251E-04 4.5025E-04 S9 -3.1513E-01 -1.4680E-03 -7.4599E-03 -4.9376E-03 -8.2643E-04 1.1714E-04 1.0820E-03 S10 -4.3772E-01 4.1565E-02 -4.6654E-03 -2.2302E-03 1.9418E-04 3.6288E-05 6.3520E-04 S11 -5.3370E-01 -2.3337E-02 3.4756E-02 1.0497E-02 3.8539E-03 -1.1132E-03 -2.0095E-03 S12 -4.2772E-01 1.0577E-01 8.8055E-03 -1.0436E-02 2.7695E-03 1.3817E-03 -8.4486E-04 S13 -2.8377E+00 7.2174E-01 -4.2953E-02 -5.6716E-02 1.0920E-02 -7.4838E-04 4.8046E-03 S14 -1.7087E+00 2.3947E-01 7.0719E-02 -1.7243E-02 2.8546E-02 -2.4910E-02 -1.4856E-03 S15 1.5752E+00 8.5844E-02 -1.5722E-01 5.9664E-02 -2.8240E-02 -9.9426E-03 1.0405E-02 S16 -3.1690E+00 6.6168E-01 -1.7950E-02 -3.5354E-05 -6.5813E-02 -1.2761E-02 1.2070E-03

[0159] Table 14-1

[0160] Face number A18 A20 A22 A24 A26 A28 A30 S1 1.2377E-05 -5.3724E-06 2.6408E-06 -5.3563E-06 5.0837E-07 -3.1857E-06 1.7007E-06 S2 -3.7252E-05 -2.2699E-06 2.0822E-06 6.6309E-06 3.3424E-06 1.2503E-06 -1.5181E-06 S3 -6.7729E-05 2.4177E-06 -7.1464E-06 7.3867E-06 -2.7208E-06 9.3396E-06 -3.6835E-06 S4 -7.6580E-05 -2.7995E-05 -1.8001E-05 7.3975E-06 2.0575E-06 -4.2797E-06 2.2289E-06 S5 -3.4370E-05 -1.7342E-05 -1.7612E-05 -6.3198E-07 -8.5510E-06 -1.4628E-06 2.6244E-06 S6 -8.3587E-07 -3.5649E-05 -2.3862E-05 -2.0277E-05 -8.1682E-06 -6.9093E-06 6.1435E-06 S7 1.4464E-05 2.5825E-05 -2.5066E-06 3.4101E-06 -5.8174E-06 6.7898E-06 -2.1384E-06 S8 1.8799E-04 1.3280E-04 1.4801E-05 1.7423E-05 -1.4660E-05 1.7978E-06 -4.6853E-06 S9 3.1311E-04 1.7097E-04 3.2528E-05 4.1750E-05 -2.1292E-05 -2.0084E-06 -7.4611E-06 S10 -3.4896E-04 -1.4333E-04 -1.4602E-05 1.3799E-05 -9.1442E-06 7.3889E-06 4.2143E-06 S11 -3.4205E-04 -1.0770E-04 1.1826E-04 -8.6235E-05 1.7540E-05 -3.3593E-05 2.5491E-05 S12 7.3414E-05 3.0660E-04 1.7242E-04 -1.3706E-04 -5.4025E-05 -3.7979E-05 2.6190E-05 S13 -3.7390E-03 -3.6330E-04 1.3790E-04 4.5096E-04 3.5777E-04 -1.1524E-04 -7.2269E-05 S14 -5.7615E-03 1.0723E-03 9.6246E-04 1.7510E-03 6.5364E-04 -4.2142E-04 -1.6567E-04 S15 -6.0505E-03 1.6908E-03 1.0139E-03 -3.8009E-05 -5.8723E-04 7.2866E-04 -1.5612E-04 S16 3.5878E-03 2.5239E-03 -3.0630E-04 9.6642E-04 -1.0874E-03 3.0723E-04 2.8484E-04

[0161] Table 14-2

[0162] Figure 14A The axial chromatic aberration curve of the optical imaging lens of Example 7 is shown, which indicates the deviation of the convergent focus of light of different wavelengths passing through the lens. Figure 14BThe astigmatism curve of the optical imaging lens of Example 7 is shown, which represents the meridional field curvature and the sagittal field curvature. Figure 14C The distortion curve of the optical imaging lens of Example 7 is shown, which represents the distortion magnitude values ​​corresponding to different image heights. Figure 14D The chromatic aberration curve of the optical imaging lens of Example 7 is shown, which represents the deviation of different image heights on the imaging surface after the light passes through the lens. 14A to 14D It can be seen that the optical imaging lens provided in Example 7 can achieve good imaging quality.

[0163] In addition, in Examples 1 to 7, the distance TTL from the object-side surface of the first lens to the imaging plane of the optical imaging lens along the optical axis, half the diagonal length of the effective pixel area on the imaging plane ImgH, half the maximum field of view (Semi-FOV) of the optical imaging lens, the aperture number (Fno) of the optical imaging lens, the effective focal length (f) of the optical imaging lens, and the effective focal lengths (f1 to f8) of each lens are shown in Table 15.

[0164] Parameters / Example 1 2 3 4 5 6 7 TTL(mm) 5.78 5.78 5.78 5.78 5.78 5.78 5.78 ImgH(mm) 5.36 5.36 5.36 5.11 4.60 5.36 5.36 Semi-FOV(°) 45.9 45.9 45.9 44.5 41.7 46.0 46.13 Fno 1.9 1.9 1.9 1.9 1.9 1.9 1.90 f(mm) 5.08 5.08 5.07 5.09 5.07 5.08 5.04 f1(mm) 5.17 5.28 5.12 5.18 5.20 5.30 5.23 f2(mm) -13.62 -13.94 -12.48 -14.00 -13.65 -14.05 -14.02 f3(mm) 24.01 25.61 22.17 23.79 24.40 24.51 23.36 f4(mm) 50.58 53.11 -63.48 -62.09 51.13 44.79 35.79 f5(mm) -26.14 -25.48 73.68 73.68 -24.80 -22.43 -25.13 f6(mm) 14.43 13.37 22.48 29.21 14.18 13.06 16.32 f7(mm) 9.71 8.88 7.89 9.03 9.94 9.30 9.82 f8(mm) -3.52 -3.48 -3.34 -3.59 -3.53 -3.44 -3.52

[0165] Table 15

[0166] Examples 1 to 7 respectively satisfy the conditions shown in Table 16.

[0167] Conditional formula / Example 1 2 3 4 5 6 7 TTL / ImgH 1.08 1.08 1.08 1.13 1.26 1.08 1.08 ImgH / tan(Semi-FOV)(mm) 5.19 5.20 5.18 5.20 5.16 5.18 5.15 TTL / f 1.14 1.14 1.14 1.14 1.14 1.14 1.15 f3 / f 4.73 5.04 4.37 4.67 4.81 4.83 4.64 f7 / f 1.91 1.75 1.56 1.77 1.96 1.83 1.95 f8 / (R15+R16) -0.63 -0.74 -1.10 -0.61 -0.64 -0.63 -0.63 ET7 / (ET6+ET8) 0.40 0.60 0.98 0.42 0.46 0.48 0.56 CT1 / CT7 1.21 1.68 1.50 1.16 1.27 1.58 1.20 CT6 / CT5 1.44 1.51 1.46 1.26 1.43 1.50 1.66 f1 / f 1.02 1.04 1.01 1.02 1.02 1.04 1.04 f2 / f -2.68 -2.74 -2.46 -2.75 -2.69 -2.77 -2.78 ET1 / CT1 0.33 0.34 0.34 0.33 0.34 0.34 0.34 T34 / (T12+T23+T45) 1.05 0.96 1.02 1.29 0.99 0.99 0.91 1 / (R5 / R6+R7 / R8) 0.44 0.25 1.14 0.98 0.43 0.27 0.40 TTL×EPD 15.45 15.47 15.42 15.49 15.43 15.45 15.33

[0168] Table 16

[0169] The present application also provides an imaging device, which is provided with an electronic photosensitive element for imaging. The electronic photosensitive element can be a charge coupled device (CCD) or a complementary metal oxide semiconductor (CMOS). The imaging device can be a standalone imaging device such as a digital camera, or an imaging module integrated into a mobile electronic device such as a mobile phone. The imaging device is equipped with the optical imaging lens described above.

[0170] The above description is merely a preferred embodiment of the present application and an illustration of the technical principles employed. Those skilled in the art should understand that the scope of protection provided in this application is not limited to the technical solutions formed by a specific combination of the above-mentioned technical features, but also encompasses other technical solutions formed by any combination of the above-mentioned technical features or their equivalents without departing from the concept of this application. For example, a technical solution formed by replacing the above-mentioned features with (but not limited to) technical features with similar functions disclosed in this application.

Claims

1. An optical imaging lens, characterized in that: The optical system includes, from the object side to the image side, a first lens, a second lens, a third lens, a fourth lens, a fifth lens, a sixth lens, a seventh lens, and an eighth lens, wherein: The first lens has positive refractive power, its object side surface is convex, and its image side surface is concave; The second lens has negative optical power, its object side surface is convex, and its image side surface is concave; The third lens has positive refractive power, its object side surface is convex, and its image side surface is concave; The object-side surface of the fourth lens is concave, and the image-side surface is convex; The sixth lens has positive refractive power, and its image side surface is convex; The seventh lens has positive refractive power, its object-side surface is convex, and its image-side surface is concave; The eighth lens has negative optical power, and its object-side surface and image-side surface are concave; The fourth lens and the fifth lens have opposite positive and negative optical power properties; The number of lenses having optical power in the optical imaging lens is eight; The optical imaging lens meets the following requirements: 1.08≤TTL / ImgH≤1.26, and 4.37≤f3 / f≤5.04, -1.10≤f8 / (R15+R16)≤-0.61, 1.26≤CT6 / CT5≤1.66, -2.78≤f2 / f≤-2.46, Wherein, TTL is the distance from the object side surface of the first lens to the imaging surface of the optical imaging lens along the optical axis, ImgH is half the diagonal length of the effective pixel area on the imaging surface, f3 is the effective focal length of the third lens, f is the effective focal length of the optical imaging lens, f8 is the effective focal length of the eighth lens, R15 is the curvature radius of the object side surface of the eighth lens, R16 is the curvature radius of the image side surface of the eighth lens, CT6 is the center thickness of the sixth lens on the optical axis, CT5 is the center thickness of the fifth lens on the optical axis, and f2 is the effective focal length of the second lens.

2. The optical imaging lens according to claim 1, wherein: The distance TTL from the object side of the first lens to the imaging plane along the optical axis and the entrance pupil diameter EPD of the optical imaging lens satisfy: <h2 style=";text-align:left;direction:ltr">15.33mm<h2 style=";text-align:left;direction:ltr"> 2 <h2 style=";text-align:left;direction:ltr"> ≤TTL×EPD≤15.49mm<h2 style=";text-align:left;direction:ltr"> 2 <h2 style=";text-align:left;direction:ltr"> 。 3. The optical imaging lens according to claim 1, wherein: The center thickness CT1 of the first lens on the optical axis and the center thickness CT7 of the seventh lens on the optical axis satisfy: 1.16≤CT1 / CT7≤1.

68.

4. The optical imaging lens according to claim 1, wherein: The edge thickness ET7 of the seventh lens, the edge thickness ET6 of the sixth lens, and the edge thickness ET8 of the eighth lens satisfy the following requirements: 0.40≤ET7 / (ET6+ET8)≤0.

98.

5. The optical imaging lens according to claim 1, wherein: The distance T34 on the optical axis from the image side surface of the third lens to the object side surface of the fourth lens, the distance T12 on the optical axis from the image side surface of the first lens to the object side surface of the second lens, the distance T23 on the optical axis from the image side surface of the second lens to the object side surface of the third lens, and the distance T45 on the optical axis from the image side surface of the fourth lens to the object side surface of the fifth lens satisfy: 0.91≤T34 / (T12+T23+T45)≤1.

29.

6. The optical imaging lens according to any one of claims 1 to 5, wherein: The eighth lens has negative optical power, and half of the diagonal length ImgH of the effective pixel area on the imaging plane of the optical imaging lens and half of the maximum field of view Semi-FOV of the optical imaging lens satisfy the following relationship: 5.15mm≤ImgH / tan(Semi-FOV)≤5.20mm.

7. The optical imaging lens according to any one of claims 1 to 5, wherein: The distance TTL from the object side surface of the first lens to the imaging surface of the optical imaging lens along the optical axis and the effective focal length f of the optical imaging lens satisfy: 1.14≤TTL / f<1.

5.

8. The optical imaging lens according to any one of claims 1 to 5, wherein: The first lens has positive refractive power, and the effective focal length f7 of the seventh lens and the effective focal length f of the optical imaging lens satisfy: 1.56≤f7 / f≤1.

96.

9. The optical imaging lens according to any one of claims 1 to 5, wherein: The curvature radius R5 of the object-side surface of the third lens, the curvature radius R6 of the image-side surface of the third lens, the curvature radius R7 of the object-side surface of the fourth lens, and the curvature radius R8 of the image-side surface of the fourth lens satisfy: 0.25≤1 / (R5 / R6+R7 / R8)≤1.

14.

10. The optical imaging lens according to any one of claims 1 to 5, wherein: The edge thickness ET1 of the first lens and the center thickness CT1 of the first lens on the optical axis satisfy: 0.33≤ET1 / CT1<0.

8.

11. The optical imaging lens according to any one of claims 1 to 5, wherein: At least one of the first to eighth lenses is a glass lens, and at least two of the first to eighth lenses are plastic lenses having a refractive index greater than 1.

50.

12. The optical imaging lens according to claim 1, wherein: The center thickness CT1 of the first lens on the optical axis and the center thickness CT7 of the seventh lens on the optical axis satisfy: 1 <CT1 / CT7<2。 13. The optical imaging lens according to any one of claims 1 to 5, wherein: The effective focal length f1 of the first lens and the effective focal length f of the optical imaging lens satisfy: 1.01≤f1 / f≤1.04.

Images