Optical imaging lens

Abstract

The present application discloses an optical imaging lens, which comprises, in order from the object side to the image side along the optical axis: a first lens having negative optical power; a second lens having positive optical power; a third lens having positive optical power; a fourth lens having negative optical power; a fifth lens having positive optical power; a sixth lens having positive optical power; and a seventh lens having negative optical power. The third lens is a spherical lens made of glass; at least three of the fourth to seventh lenses are made of plastic; the total effective focal length f of the optical imaging lens and the entrance pupil diameter EPD of the optical imaging lens can satisfy the following conditions: f / EPD < 1.2; the effective focal length f1 of the first lens, the curvature radius R1 of the object side surface of the first lens, and the curvature radius R2 of the image side surface of the first lens can satisfy the following conditions: -2.0 < f1 / (R1 + R2) < -1.2; and the number of lenses having optical power in the optical imaging lens is seven.

Description

[0001] Divisional application statement

[0002] This application is a divisional application of the Chinese invention patent application with the invention name “Optical Imaging Lens” and application number 202110617400.7 submitted on June 3, 2021. Technical Field

[0003] The present application relates to the field of optical elements, and in particular, to an optical imaging lens. Background Art

[0004] As video surveillance products gradually move toward high-definition imaging, their resolution has grown from 300,000 pixels to nearly 3 million pixels, ushering in a revolution in global video surveillance technology. Simultaneously, surveillance cameras, a core component of video surveillance, are entering a period of rapid development.

[0005] Currently, security monitoring systems are widely used in numerous public spaces, including road traffic, industrial production, hospitals, airports, and libraries. Optical imaging lenses play a crucial role in these systems. Building on existing technologies, how to optimally balance key technical parameters such as the focal length and material of each lens element to achieve lower costs and higher pixel resolution has become a pressing challenge for lens designers. Summary of the Invention

[0006] 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 having negative optical power; a second lens having positive optical power; a third lens having positive optical power; a fourth lens having negative optical power; a fifth lens having positive optical power; a sixth lens having positive optical power; and a seventh lens having negative optical power. The third lens is a spherical lens made of glass; at least three of the fourth to seventh lenses are made of plastic; the total effective focal length f of the optical imaging lens and the entrance pupil diameter (EPD) of the optical imaging lens satisfy the following conditions: f / EPD < 1.2; the effective focal length f1 of the first lens, the radius of curvature R1 of the object side surface of the first lens, and the radius of curvature R2 of the image side surface of the first lens satisfy the following conditions: -2.0 < f1 / (R1 + R2) < -1.2; and the number of lenses having optical power in the optical imaging lens is seven.

[0007] In one embodiment, the effective focal length f5 of the fifth lens, the effective focal length f3 of the third lens, and the effective focal length f4 of the fourth lens may satisfy: 1.0<f5 / (f3+f4)<2.1.

[0008] In one embodiment, the total effective focal length f of the optical imaging lens, the effective focal length f6 of the sixth lens element, and the effective focal length f7 of the seventh lens element may satisfy: -1.4<f / (f6+f7)<-0.7.

[0009] In one embodiment, the curvature radius R3 of the object-side surface of the second lens, the curvature radius R4 of the image-side surface of the second lens, the curvature radius R5 of the object-side surface of the third lens, and the curvature radius R6 of the image-side surface of the third lens may satisfy: 0.9<(R5+R6) / (R3+R4)<2.7.

[0010] In one embodiment, a curvature radius R7 of the object-side surface of the fourth lens and a curvature radius R8 of the image-side surface of the fourth lens may satisfy: 1.5<(R7+R8) / (R7-R8)<2.2.

[0011] In one embodiment, the spacing distance T12 between the first lens and the second lens on the optical axis, the spacing distance T34 between the third lens and the fourth lens on the optical axis, and the spacing distance T56 between the fifth lens and the sixth lens on the optical axis may satisfy: 0.8<T12 / (T34+T56)<1.5.

[0012] In one embodiment, the combined focal length f67 of the sixth lens and the seventh lens and the combined focal length f345 of the third lens, the fourth lens, and the fifth lens may satisfy: 1.2<f67 / f345<1.8.

[0013] In one embodiment, the distance SAG42 from the intersection of the image side surface of the fourth lens and the optical axis to the vertex of the effective radius of the image side surface of the fourth lens on the optical axis, the distance SAG51 from the intersection of the object side surface of the fifth lens and the optical axis to the vertex of the effective radius of the object side surface of the fifth lens on the optical axis, and the distance SAG52 from the intersection of the image side surface of the fifth lens and the optical axis to the vertex of the effective radius of the image side surface of the fifth lens on the optical axis may satisfy: 1.6<SAG42 / (SAG51+SAG52)<2.4.

[0014] In one embodiment, the distance SAG71 from the intersection of the object side surface of the seventh lens and the optical axis to the vertex of the effective radius of the object side surface of the seventh lens on the optical axis and the distance SAG72 from the intersection of the image side surface of the seventh lens and the optical axis to the vertex of the effective radius of the image side surface of the seventh lens on the optical axis may satisfy: 1.5<SAG72 / SAG71<2.7.

[0015] In one embodiment, the edge thickness ET1 of the first lens, the edge thickness ET3 of the third lens, and the edge thickness ET5 of the fifth lens may satisfy: 1.0<ET1 / (ET3+ET5)<1.5.

[0016] In one embodiment, an edge thickness ET4 of the fourth lens, an edge thickness ET6 of the sixth lens, and an edge thickness ET7 of the seventh lens may satisfy: 0.8<ET4 / (ET6+ET7)<1.3.

[0017] In one embodiment, the distance TTL from the object-side surface of the first lens to the imaging surface of the optical imaging lens on the optical axis and the entrance pupil diameter EPD of the optical imaging lens may satisfy the relationship: 3.0<TTL / EPD<5.0.

[0018] In one embodiment, the optical imaging lens further includes an aperture, and a distance SL from the aperture to the imaging plane of the optical imaging lens on the optical axis and a distance TTL from the object-side surface of the first lens to the imaging plane of the optical imaging lens on the optical axis may satisfy: 1.6<TTL / SL<2.1.

[0019] In an exemplary embodiment of the present application, by reasonably setting the optical focal length of the first lens to the seventh lens, it is beneficial to improve the aberration correction ability of the lens and reduce the sensitivity of the lens. For example, in the present application, the third lens can be set as a spherical lens made of glass, which is beneficial to improving the imaging quality of the lens. For example, at least three lenses among the fourth lens to the seventh lens can be set as lenses made of plastic material, which is beneficial to reducing the manufacturing cost of the lens. For example, setting the optical imaging lens to meet f / EPD<1.2 can not only effectively increase the light transmittance of the lens and improve the relative illumination of the lens, but also greatly improve the imaging quality of the lens in darker environments and improve the practicality of the lens. For example, setting the optical imaging lens to meet -2.0<f1 / (R1+R2)<-1.2 can not only make the lens have a higher aberration correction ability, but also make the lens have better manufacturability. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Other features, objects and advantages of the present application will become more apparent upon reading the detailed description of non-limiting embodiments made with reference to the following drawings:

[0021] Figure 1 1 shows a schematic structural diagram of an optical imaging lens according to Example 1 of the present application;

[0022] 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;

[0023] Figure 3 1 shows a schematic structural diagram of an optical imaging lens according to Example 2 of the present application;

[0024] Figures 4A to 4Daxial chromatic aberration curve, astigmatism curve, distortion curve, and lateral chromatic aberration curve of the optical imaging lens of Example 2 are respectively shown;

[0025] Figure 5 1 shows a schematic structural diagram of an optical imaging lens according to Example 3 of the present application;

[0026] 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;

[0027] Figure 7 1 shows a schematic structural diagram of an optical imaging lens according to Example 4 of the present application;

[0028] 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;

[0029] Figure 9 shows a schematic structural diagram of an optical imaging lens according to Example 5 of the present application; and

[0030] 10A to 10D The axial chromatic aberration curve, astigmatism curve, distortion curve, and lateral chromatic aberration curve of the optical imaging lens of Example 5 are respectively shown. DETAILED DESCRIPTION

[0031] 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.

[0032] 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.

[0033] 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.

[0034] In this article, 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. 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.

[0035] 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.

[0036] 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.

[0037] 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.

[0038] The features, principles and other aspects of the present application are described in detail below.

[0039] An optical imaging lens according to an exemplary embodiment of the present application may include seven lenses having optical power, namely a first lens, a second lens, a third lens, a fourth lens, a fifth lens, a sixth lens, and a seventh lens. These seven lenses are arranged sequentially along the optical axis from the object side to the image side. Any two adjacent lenses among the first through seventh lenses may be spaced apart by a distance.

[0040] In an exemplary embodiment, the first lens may have positive or negative optical power; the second lens may have positive optical power; the third lens may have positive or negative optical power; the fourth lens may have negative optical power; the fifth lens may have positive or negative optical power; the sixth lens may have positive or negative optical power; and the seventh lens may have negative optical power. By properly configuring the optical powers of the first through seventh lenses, the aberration correction capability of the lens can be improved and sensitivity can be reduced. In particular, configuring the seventh lens to have negative optical power can increase the image height on the imaging plane, giving the lens a large image surface.

[0041] In an exemplary embodiment, the optical imaging lens according to the present application may satisfy the following relationship: f / EPD < 1.2, where f is the total effective focal length of the optical imaging lens and EPD is the entrance pupil diameter of the optical imaging lens. More specifically, f and EPD may further satisfy the following relationship: f / EPD < 1.0. Meeting f / EPD < 1.2 effectively increases the light throughput and relative illumination of the lens, while also significantly improving imaging quality in dark environments and enhancing the practicality of the lens.

[0042] In an exemplary embodiment, the optical imaging lens according to the present application may satisfy the following: -2.0 < f1 / (R1 + R2) < -1.2, where f1 is the effective focal length of the first lens element, R1 is the radius of curvature of the object-side surface of the first lens element, and R2 is the radius of curvature of the image-side surface of the first lens element. More specifically, f1, R1, and R2 may further satisfy the following: -2.0 < f1 / (R1 + R2) < -1.4. Satisfying -2.0 < f1 / (R1 + R2) < -1.2 allows the lens to have both high aberration correction capabilities and improved manufacturability.

[0043] In an exemplary embodiment, the optical imaging lens according to the present application may satisfy the following conditions: 1.0 < f5 / (f3 + f4) < 2.1, where f5 is the effective focal length of the fifth lens, f3 is the effective focal length of the third lens, and f4 is the effective focal length of the fourth lens. More specifically, f5, f3, and f4 may further satisfy the following conditions: 1.1 < f5 / (f3 + f4) < 2.1. Satisfying 1.0 < f5 / (f3 + f4) < 2.1 not only allows for a more rational distribution of the focal power of each lens, preventing excessive concentration of focal power on the fifth lens, thereby improving the imaging quality of the lens and reducing its sensitivity, but also enables the optical imaging lens to achieve good imaging results at both high and low temperatures.

[0044] In an exemplary embodiment, the optical imaging lens according to the present application can satisfy the following relationship: -1.4 < f / (f6 + f7) < -0.7, where f is the total effective focal length of the optical imaging lens, f6 is the effective focal length of the sixth lens element, and f7 is the effective focal length of the seventh lens element. Satisfying -1.4 < f / (f6 + f7) < -0.7 effectively reduces overall lens aberrations and lens sensitivity. Furthermore, by controlling the focal power of the sixth and seventh lenses, excessive tilt angles of the object-side surfaces of the sixth and seventh lenses can be avoided, resulting in improved processability for the sixth and seventh lenses.

[0045] In an exemplary embodiment, the optical imaging lens according to the present application may satisfy the following: 0.9<(R5+R6) / (R3+R4)<2.7, wherein R3 is the radius of curvature of the object-side surface of the second lens, R4 is the radius of curvature of the image-side surface of the second lens, R5 is the radius of curvature of the object-side surface of the third lens, and R6 is the radius of curvature of the image-side surface of the third lens. More specifically, R5, R6, R3, and R4 may further satisfy the following: 1.0<(R5+R6) / (R3+R4)<2.6. Satisfying 0.9<(R5+R6) / (R3+R4)<2.7 can ensure that the second and third lenses have good processability while avoiding problems such as poor lens imaging quality and high sensitivity caused by an excessively large aperture of the third lens.

[0046] In an exemplary embodiment, the optical imaging lens according to the present application may satisfy the following conditions: 1.5<(R7+R8) / (R7-R8)<2.2, wherein R7 is the radius of curvature of the object-side surface of the fourth lens, and R8 is the radius of curvature of the image-side surface of the fourth lens. More specifically, R7 and R8 may further satisfy the following conditions: 1.6<(R7+R8) / (R7-R8)<2.2. Satisfying 1.5<(R7+R8) / (R7-R8)<2.2 can avoid problems such as processing difficulties caused by the fourth lens being too thin. By rationally adjusting the structural dimensions of the fourth lens, it is beneficial to reduce the size of the lens, maintain good processability of the lens, and reduce the amount of distortion affected by the lens.

[0047] In an exemplary embodiment, the optical imaging lens according to the present application may satisfy the following: 0.8 < T12 / (T34 + T56) < 1.5, where T12 is the distance between the first and second lenses on the optical axis, T34 is the distance between the third and fourth lenses on the optical axis, and T56 is the distance between the fifth and sixth lenses on the optical axis. More specifically, T12, T34, and T56 may further satisfy the following: 0.9 < T12 / (T34 + T56) < 1.4. Satisfying 0.8 < T12 / (T34 + T56) < 1.5 facilitates adjusting the gap sensitivity between the lenses and avoids the problem of excessive lens length due to excessive gaps between the lenses.

[0048] In an exemplary embodiment, the optical imaging lens according to the present application can satisfy the following relationship: 1.2 < f67 / f345 < 1.8, where f67 is the combined focal length of the sixth and seventh lenses, and f345 is the combined focal length of the third, fourth, and fifth lenses. This criterion of 1.2 < f67 / f345 < 1.8 not only facilitates the proper distribution of optical power among the lenses, preventing excessive concentration of optical power on the first few lenses (e.g., the first through fourth lenses), but also facilitates the adjustment of lens temperature sensitivity.

[0049] In an exemplary embodiment, the optical imaging lens according to the present application may satisfy the following: 1.6 < SAG42 / (SAG51 + SAG52) < 2.4, where SAG42 is the distance on the optical axis from the intersection of the image-side surface of the fourth lens element and the optical axis to the vertex of the effective radius of the image-side surface of the fourth lens element, SAG51 is the distance on the optical axis from the intersection of the object-side surface of the fifth lens element and the optical axis to the vertex of the effective radius of the object-side surface of the fifth lens element, and SAG52 is the distance on the optical axis from the intersection of the image-side surface of the fifth lens element and the optical axis to the vertex of the effective radius of the image-side surface of the fifth lens element. More specifically, SAG42, SAG51, and SAG52 may further satisfy the following: 1.7 < SAG42 / (SAG51 + SAG52) < 2.4. Satisfying 1.6 < SAG42 / (SAG51 + SAG52) < 2.4 not only helps reduce the sensitivity of the fourth and fifth lenses, improves their manufacturability, but also facilitates mass production of the optical imaging lens.

[0050] In an exemplary embodiment, the optical imaging lens according to the present application may satisfy the following conditions: 1.5<SAG72 / SAG71<2.7, wherein SAG71 is the distance on the optical axis from the intersection of the object-side surface of the seventh lens and the optical axis to the vertex of the effective radius of the object-side surface of the seventh lens, and SAG72 is the distance on the optical axis from the intersection of the image-side surface of the seventh lens and the optical axis to the vertex of the effective radius of the image-side surface of the seventh lens. More specifically, SAG72 and SAG71 may further satisfy the following conditions: 1.6<SAG72 / SAG71<2.6. Satisfying 1.5<SAG72 / SAG71<2.7 is beneficial for improving the manufacturability of the seventh lens as much as possible while ensuring the basic performance of the lens.

[0051] In an exemplary embodiment, the optical imaging lens according to the present application may satisfy the following: 1.0<ET1 / (ET3+ET5)<1.5, wherein ET1 is the edge thickness of the first lens, ET3 is the edge thickness of the third lens, and ET5 is the edge thickness of the fifth lens. More specifically, ET1, ET3, and ET5 may further satisfy the following: 1.0<ET1 / (ET3+ET5)<1.4. Satisfying 1.0<ET1 / (ET3+ET5)<1.5 can not only enable the first lens, the third lens, and the fifth lens to better balance the chromatic aberration generated by the entire lens and effectively control the amount of distortion of the lens, but also effectively avoid the difficulty in the processing of the fifth lens due to its excessive thinness, and can also reduce the sensitivity of the lens and improve the overall yield of the lens.

[0052] In an exemplary embodiment, the optical imaging lens according to the present application may satisfy the following: 0.8 < ET4 / (ET6 + ET7) < 1.3, where ET4 is the edge thickness of the fourth lens element, ET6 is the edge thickness of the sixth lens element, and ET7 is the edge thickness of the seventh lens element. More specifically, ET4, ET6, and ET7 may further satisfy the following: 0.9 < ET4 / (ET6 + ET7) < 1.3. Meeting 0.8 < ET4 / (ET6 + ET7) < 1.3 not only helps improve edge illumination, but also ensures relatively reasonable processing properties for the fourth, sixth, and seventh lenses.

[0053] In an exemplary embodiment, the optical imaging lens according to the present application may satisfy the following conditions: 3.0 < TTL / EPD < 5.0, where TTL is the distance along the optical axis from the object-side surface of the first lens element to the imaging plane of the optical imaging lens, and EPD is the entrance pupil diameter of the optical imaging lens. More specifically, TTL and EPD may further satisfy the following conditions: 3.5 < TTL / EPD < 4.2. This condition of 3.0 < TTL / EPD < 5.0 not only helps keep the overall lens length (TTL) within an appropriate range, but also helps avoid problems such as insufficient light transmission due to an excessively small entrance pupil diameter (EPD).

[0054] In an exemplary embodiment, the optical imaging lens according to the present application further includes an aperture stop disposed between the third lens and the fourth lens. In particular, the optical imaging lens according to the present application may satisfy: 1.6<TTL / SL<2.1, wherein SL is the distance from the aperture stop to the imaging plane of the optical imaging lens on the optical axis, and TTL is the distance from the object side surface of the first lens to the imaging plane of the optical imaging lens on the optical axis. More specifically, TTL and SL may further satisfy: 1.7<TTL / SL<2.0. Satisfying 1.6<TTL / SL<2.1 can not only reasonably distribute the center thickness and spacing distance of each lens in the lens, so that the optical imaging lens can effectively balance the overall chromatic aberration and distortion of the lens while ensuring good performance, but also avoid difficulties in the processing process caused by the excessive thinness of each lens.

[0055] In an exemplary embodiment, the third lens may be a spherical lens made of glass, that is, the third lens may be a lens made of glass, and both the object-side surface and the image-side surface of the third lens may be spherical mirror surfaces. The use of glass lenses in this application is beneficial to improving the imaging quality of the lens. In an exemplary embodiment, at least three lenses from the fourth lens to the seventh lens are made of plastic. The use of plastic lenses in this application is beneficial to reducing the manufacturing cost of the lens. In particular, the optical imaging lens provided in this application can improve the imaging quality of the lens and achieve high-definition imaging while reducing production costs by using a mix of plastic lenses and glass lenses.

[0056] In an exemplary embodiment, the optical imaging lens according to the present application may further include a filter for correcting color deviation and / or a protective glass for protecting the photosensitive element located on the imaging surface. The present application proposes an optical imaging lens with characteristics such as a large aperture, low cost, a large target area, and high imaging quality. The optical imaging lens according to the above-mentioned embodiment of the present application may adopt multiple lenses, such as the seven lenses mentioned above. By reasonably allocating the optical power, surface shape, center thickness of each lens, and the on-axis spacing between each lens, the incident light can be effectively converged, the total optical length of the imaging lens can be reduced, and the processability of the imaging lens can be improved, making the optical imaging lens more conducive to production and processing.

[0057] In an embodiment of the present application, at least one of the mirror surfaces of the first lens, the second lens, and the fourth lens through the seventh lens is an aspherical mirror surface, that is, at least one of the object-side and image-side surfaces of the first lens and the second lens, and at least one of the object-side and image-side surfaces of the fourth lens through 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. Unlike a spherical lens, which has a constant curvature from the center of the lens to the periphery, an aspherical lens has a better curvature radius characteristic, with the advantages of improving distortion aberration and astigmatism. After adopting an aspherical lens, aberrations that occur during imaging can be eliminated as much as possible, thereby improving imaging quality. Optionally, at least one of the object-side and image-side surfaces of each of the first lens, the second lens, the fourth lens, the fifth lens, the sixth lens, and the seventh lens is an aspherical mirror surface. Optionally, both the object-side and image-side surfaces of each of the first lens, the second lens, the fourth lens, the fifth lens, the sixth lens, and the seventh lens are aspherical mirror surfaces.

[0058] 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 the embodiments describe seven lenses as an example, the optical imaging lens is not limited to including seven lenses. If desired, the optical imaging lens may also include other numbers of lenses.

[0059] Specific embodiments of the optical imaging lens applicable to the above-mentioned embodiments will be further described below with reference to the accompanying drawings.

[0060] Example 1

[0061] 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.

[0062] like Figure 1 As shown, the optical imaging lens includes, from the object side to the image side, a first lens E1, a second lens E2, a third lens E3, an aperture STO, a fourth lens E4, a fifth lens E5, a sixth lens E6, a seventh lens E7, a filter E8 and an imaging surface S17.

[0063] The first lens E1 has negative optical power, with its object-side surface S1 being convex and its image-side surface S2 being concave. The second lens E2 has positive optical power, with its object-side surface S3 being concave and its image-side surface S4 being convex. The third lens E3 has positive optical power, with its object-side surface S5 being convex and its image-side surface S6 being convex. The fourth lens E4 has negative optical power, with its object-side surface S7 being convex and its image-side surface S8 being concave. The fifth lens E5 has positive optical power, with its object-side surface S9 being convex and its image-side surface S10 being convex. The sixth lens E6 has positive optical power, with its object-side surface S11 being convex and its image-side surface S12 being convex. The seventh lens E7 has negative optical power, with its object-side surface S13 being convex and its image-side surface S14 being concave. The filter E8 has an object-side surface S15 and an image-side surface S16. Light from an object sequentially passes through surfaces S1 to S16 and is ultimately imaged on an imaging surface S17.

[0064] Table 1 shows the basic parameters of the optical imaging lens of Example 1, wherein the units of curvature radius, thickness / distance and focal length are all millimeters (mm).

[0065] Face number Surface type Radius of curvature Thickness / distance Refractive index Abbe number Material focal length Cone coefficient OBJ spherical surface endless endless S1 Aspheric 6.6598 2.0000 1.55 56.1 plastic -19.56 -1.0000 S2 Aspheric 3.6668 4.2529 -1.0000 S3 Aspheric -7.9489 3.5000 1.64 23.5 plastic 39.21 0.0000 S4 Aspheric -7.0864 0.0447 0.0000 S5 spherical surface 14.2588 3.4694 1.69 54.6 Glass 15.74 S6 spherical surface -42.1611 0.8513 STO spherical surface endless 0.5206 S7 Aspheric 14.1013 1.5344 1.66 20.4 plastic -8.38 0.0000 S8 Aspheric 3.8220 0.4042 -1.0000 S9 Aspheric 6.1677 3.8502 1.54 55.7 plastic 8.70 0.0000 S10 Aspheric -14.9997 1.8192 0.0000 S11 Aspheric 43.9344 3.1143 1.55 56.1 plastic 12.36 0.0000 S12 Aspheric -7.7710 0.0226 0.0000 S13 Aspheric 4.8620 1.1213 1.66 20.4 plastic -20.43 0.0000 S14 Aspheric 3.2516 0.9295 -1.7070 S15 spherical surface endless 0.6997 1.52 64.2 Glass S16 spherical surface endless 2.8290 S17 spherical surface endless

[0066] Table 1

[0067] In this example, the total effective focal length f of the optical imaging lens is 8.28 mm, the total length TTL of the optical imaging lens (i.e., the distance on the optical axis from the object-side surface S1 of the first lens element E1 to the imaging surface S17 of the optical imaging lens) is 30.96 mm, half the diagonal length ImgH of the effective pixel area on the imaging surface S17 of the optical imaging lens is 4.55 mm, and the maximum field of view FOV of the optical imaging lens is 66.3°.

[0068] In Example 1, the object-side surface and the image-side surface of any of the first lens E1, the second lens E2, and the fourth lens E4 to the seventh lens E7 are all aspherical surfaces. The surface shape x of each aspherical lens can be defined by, but is not limited to, the following aspherical surface formula:

[0069]

[0070] 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 inverse 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. Table 2 below lists 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, A50, A51, A52, A53, A54, A55, A56, A57, A58, A59, A60, A61, A71, A72, A73, A74, A75, A80, A81, A9, A10, A11, A12, A13, A14, A15 10 、A 12 、A 14 、A 16 、A 18 and A20 .

[0071]

[0072]

[0073] Table 2

[0074] Figure 2A The axial chromatic aberration curve of the optical imaging lens of Example 1 is shown, which indicates the deviation of the focal point 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.

[0075] Example 2

[0076] 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.

[0077] like Figure 3 As shown, the optical imaging lens includes, from the object side to the image side, a first lens E1, a second lens E2, a third lens E3, an aperture STO, a fourth lens E4, a fifth lens E5, a sixth lens E6, a seventh lens E7, a filter E8 and an imaging surface S17.

[0078] The first lens E1 has negative optical power, with its object-side surface S1 being convex and its image-side surface S2 being concave. The second lens E2 has positive optical power, with its object-side surface S3 being concave and its image-side surface S4 being convex. The third lens E3 has positive optical power, with its object-side surface S5 being convex and its image-side surface S6 being convex. The fourth lens E4 has negative optical power, with its object-side surface S7 being convex and its image-side surface S8 being concave. The fifth lens E5 has positive optical power, with its object-side surface S9 being convex and its image-side surface S10 being convex. The sixth lens E6 has positive optical power, with its object-side surface S11 being convex and its image-side surface S12 being convex. The seventh lens E7 has negative optical power, with its object-side surface S13 being convex and its image-side surface S14 being concave. The filter E8 has an object-side surface S15 and an image-side surface S16. Light from an object sequentially passes through surfaces S1 to S16 and is ultimately imaged on an imaging surface S17.

[0079] In this example, the total effective focal length f of the optical imaging lens is 8.09 mm, the total length TTL of the optical imaging lens is 32.58 mm, half the diagonal length ImgH of the effective pixel area on the imaging surface S17 of the optical imaging lens is 4.55 mm, and the maximum field of view FOV of the optical imaging lens is 65.8°.

[0080] Table 3 shows the basic parameters of the optical imaging lens of Example 2, where the units of curvature radius, thickness / distance, and focal length are all in millimeters (mm). Table 4 shows the high-order coefficients of each aspherical mirror surface that can be used in Example 2, where the surface shape of each aspherical surface can be defined by formula (1) given in Example 1 above.

[0081] Face number Surface type Radius of curvature Thickness / distance Refractive index Abbe number Material focal length Cone coefficient OBJ spherical surface endless endless S1 Aspheric 7.4393 2.0000 1.55 56.1 plastic -17.58 0.0000 S2 Aspheric 3.7928 4.5040 -1.0000 S3 Aspheric -7.8028 3.3645 1.64 23.5 plastic 64.77 0.0000 S4 Aspheric -7.6820 0.2621 0.0000 S5 spherical surface 14.2249 3.9919 1.69 54.6 Glass 14.69 S6 spherical surface -31.9168 1.2617 STO spherical surface endless 0.5829 S7 Aspheric 12.8650 1.5000 1.66 20.4 plastic -9.19 0.0000 S8 Aspheric 3.9522 0.3529 -1.0000 S9 Aspheric 6.5921 3.8625 1.53 55.5 Glass 9.20 0.0000 S10 Aspheric -15.5086 2.1322 0.0000 S11 Aspheric 40.4662 3.0500 1.55 56.1 plastic 11.70 0.0000 S12 Aspheric -7.3859 0.0300 0.0000 S13 Aspheric 4.8090 1.1400 1.66 20.4 plastic -18.72 0.0000 S14 Aspheric 3.1411 1.0314 -1.6053 S15 spherical surface endless 0.7000 1.52 64.2 Glass S16 spherical surface endless 2.8110 S17 spherical surface endless

[0082] Table 3

[0083] Face number A4 A6 A8 A10 A12 A14 A16 A18 A20 S1 -1.5811E-03 3.0398E-06 -1.6441E-06 2.2407E-07 -1.3741E-08 4.8338E-10 -1.0032E-11 1.1404E-13 -5.4938E-16 S2 -1.3527E-03 -1.8296E-05 1.7162E-06 2.2025E-08 -1.1365E-08 1.0841E-09 -5.9746E-11 1.9875E-12 -3.6800E-14 S3 5.7306E-04 -5.5992E-06 -1.2174E-06 1.2870E-07 -1.1291E-08 5.9798E-10 -1.8756E-11 3.1120E-13 -2.6208E-15 S4 5.1155E-04 5.2210E-07 -6.9862E-07 6.5456E-08 -4.0184E-09 1.4603E-10 -2.5619E-12 -2.0907E-16 6.8862E-16 S7 -3.0533E-03 2.3651E-04 -1.9755E-05 1.2371E-06 -5.5279E-08 1.7121E-09 -3.4773E-11 4.1543E-13 -2.2080E-15 S8 -7.0160E-03 6.7251E-04 -5.8838E-05 4.1336E-06 -2.2538E-07 8.6275E-09 -1.9964E-10 2.0623E-12 8.7712E-15 S9 -3.2145E-03 2.4154E-04 -1.2061E-05 3.7366E-07 -2.2500E-08 1.4359E-09 -3.9109E-11 -2.6229E-14 2.3658E-14 S10 9.9724E-04 -4.5384E-05 4.6115E-06 -5.6758E-07 4.5763E-08 -2.2982E-09 6.9812E-11 -1.1795E-12 8.4808E-15 S11 3.2475E-03 -2.2521E-04 2.5559E-05 -2.7036E-06 2.1399E-07 -1.1398E-08 3.7700E-10 -6.5772E-12 2.9460E-14 S12 5.3619E-03 -3.0496E-04 6.4774E-06 1.6445E-06 -2.3144E-07 1.5098E-08 -5.4398E-10 1.0101E-11 -6.8916E-14 S13 -7.9010E-03 5.5107E-04 -7.7580E-05 7.0897E-06 -4.6993E-07 2.1762E-08 -6.9332E-10 1.4172E-11 -1.4670E-13 S14 -1.1920E-02 1.7516E-03 -2.5277E-04 2.7265E-05 -2.1189E-06 1.1425E-07 -4.0194E-09 8.2519E-11 -7.4627E-13

[0084] Table 4

[0085] Figure 4A The axial chromatic aberration curve of the optical imaging lens of Example 2 is shown, which indicates the deviation of the focal point 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.

[0086] Example 3

[0087] 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.

[0088] like Figure 5 As shown, the optical imaging lens includes, from the object side to the image side, a first lens E1, a second lens E2, a third lens E3, an aperture STO, a fourth lens E4, a fifth lens E5, a sixth lens E6, a seventh lens E7, a filter E8 and an imaging surface S17.

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

[0090] In this example, the total effective focal length f of the optical imaging lens is 8.10 mm, the total length TTL of the optical imaging lens is 31.00 mm, half the diagonal length ImgH of the effective pixel area on the imaging surface S17 of the optical imaging lens is 4.55 mm, and the maximum field of view FOV of the optical imaging lens is 66.0°.

[0091] Table 5 shows the basic parameters of the optical imaging lens of Example 3, where the units of curvature radius, thickness / distance, and focal length are all in millimeters (mm). Table 6 shows the high-order coefficients of each aspherical mirror surface that can be used in Example 3, where the surface shape of each aspherical surface can be defined by formula (1) given in Example 1 above.

[0092]

[0093]

[0094] Table 5

[0095] Face number A4 A6 A8 A10 A12 A14 A16 A18 A20 S1 -1.5430E-03 -7.2827E-06 2.0745E-07 4.3316E-08 -3.3318E-09 1.2507E-10 -2.7558E-12 3.3690E-14 -1.7649E-16 S2 -1.2625E-03 -1.8554E-05 9.6023E-07 1.3552E-07 -2.0889E-08 1.6163E-09 -8.0118E-11 2.5143E-12 -4.5160E-14 S3 6.9616E-04 -1.0621E-05 -9.9402E-07 1.1044E-07 -1.0168E-08 5.5086E-10 -1.6881E-11 2.2354E-13 4.3979E-17 S4 6.0120E-04 -1.8055E-06 -7.9588E-07 8.5573E-08 -5.6508E-09 2.1991E-10 -4.1961E-12 4.5697E-15 1.1406E-15 S7 -3.0133E-03 2.3088E-04 -2.0255E-05 1.3448E-06 -6.3118E-08 2.0244E-09 -4.1955E-11 5.0421E-13 -2.6611E-15 S8 -7.2431E-03 7.0061E-04 -6.3132E-05 4.5363E-06 -2.4723E-07 9.3617E-09 -2.1480E-10 2.2057E-12 9.9346E-15 S9 -3.4272E-03 2.7163E-04 -1.4678E-05 4.3447E-07 -1.4210E-08 6.3044E-10 -3.6719E-12 -1.1154E-12 5.1671E-14 S10 1.2400E-03 -5.3223E-05 5.1012E-06 -6.3990E-07 5.1793E-08 -2.5930E-09 7.8206E-11 -1.3063E-12 9.2626E-15 S11 3.7930E-03 -2.6124E-04 2.7717E-05 -2.8149E-06 2.1820E-07 -1.1511E-08 3.7935E-10 -6.6251E-12 3.0180E-14 S12 6.3583E-03 -5.5502E-04 5.6698E-05 -5.2304E-06 4.0174E-07 -2.3250E-08 9.1068E-10 -2.0950E-11 2.0565E-13 S13 -7.7880E-03 3.9442E-04 -4.2203E-05 1.8389E-06 5.8242E-08 -1.3331E-08 7.7365E-10 -2.0706E-11 2.1280E-13 S14 -1.2372E-02 1.8391E-03 -2.6919E-04 2.9365E-05 -2.2882E-06 1.2274E-07 -4.2738E-09 8.6598E-11 -7.7254E-13

[0096] Table 6

[0097] Figure 6A The axial chromatic aberration curve of the optical imaging lens of Example 3 is shown, which indicates the deviation of the focal point 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.

[0098] Example 4

[0099] 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.

[0100] like Figure 7 As shown, the optical imaging lens includes, from the object side to the image side, a first lens E1, a second lens E2, a third lens E3, an aperture STO, a fourth lens E4, a fifth lens E5, a sixth lens E6, a seventh lens E7, a filter E8 and an imaging surface S17.

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

[0102] In this example, the total effective focal length f of the optical imaging lens is 8.09 mm, the total length TTL of the optical imaging lens is 33.33 mm, half the diagonal length ImgH of the effective pixel area on the imaging surface S17 of the optical imaging lens is 4.21 mm, and the maximum field of view FOV of the optical imaging lens is 60.7°.

[0103] Table 7 shows the basic parameters of the optical imaging lens of Example 4, where the units of curvature radius, thickness / distance, and focal length are all in millimeters (mm). Table 8 shows the high-order coefficients of each aspherical mirror surface that can be used in Example 4, where the surface shape of each aspherical surface can be defined by formula (1) given in Example 1 above.

[0104] Face number Surface type Radius of curvature Thickness / distance Refractive index Abbe number Material focal length Cone coefficient OBJ spherical surface endless endless S1 Aspheric 7.3669 2.0000 1.55 56.1 plastic -17.92 0.0000 S2 Aspheric 3.8000 4.6503 -1.0000 S3 Aspheric -7.8152 3.4046 1.64 23.5 plastic 59.70 0.0000 S4 Aspheric -7.6017 0.6608 0.0000 S5 spherical surface 14.4698 3.8161 1.69 54.6 Glass 15.01 S6 spherical surface -33.2660 1.3619 STO spherical surface endless 0.6040 S7 Aspheric 13.2041 1.5000 1.66 20.4 plastic -9.03 0.0000 S8 Aspheric 3.9438 0.4489 -1.0000 S9 Aspheric 6.5756 3.8395 1.54 55.7 plastic 9.28 0.0000 S10 Aspheric -16.3637 2.2941 0.0000 S11 Aspheric 35.0032 3.0500 1.53 55.5 Glass 11.66 0.0000 S12 Aspheric -7.3657 0.0300 0.0000 S13 Aspheric 4.7834 1.1400 1.66 20.4 plastic -19.37 0.0000 S14 Aspheric 3.1567 1.0270 -1.6117 S15 spherical surface endless 0.7000 1.52 64.2 Glass S16 spherical surface endless 2.8065 S17 spherical surface endless

[0105] Table 7

[0106] Face number A4 A6 A8 A10 A12 A14 A16 A18 A20 S1 -1.5478E-03 1.5881E-05 -4.3900E-06 4.8763E-07 -2.8383E-08 9.7341E-10 -1.9768E-11 2.1982E-13 -1.0341E-15 S2 -1.2365E-03 -2.4428E-05 2.2033E-06 -4.8670E-08 -5.4715E-09 8.1766E-10 -5.3554E-11 1.9350E-12 -3.7107E-14 S3 6.1422E-04 -5.9144E-06 -1.2640E-06 1.3088E-07 -1.0860E-08 5.5006E-10 -1.7049E-11 3.0598E-13 -3.4629E-15 S4 5.4280E-04 -1.7817E-07 -6.1002E-07 5.6232E-08 -3.3831E-09 1.2180E-10 -2.1980E-12 5.2251E-15 4.2728E-16 S7 -2.9892E-03 2.3448E-04 -1.9255E-05 1.1680E-06 -5.0907E-08 1.5655E-09 -3.2112E-11 3.9148E-13 -2.1299E-15 S8 -6.9558E-03 6.6133E-04 -5.6387E-05 3.8061E-06 -1.9902E-07 7.3448E-09 -1.6467E-10 1.6552E-12 6.6332E-15 S9 -3.2200E-03 2.2279E-04 -9.7109E-06 2.0646E-07 -1.1156E-08 7.5348E-10 -1.2888E-11 -6.1076E-13 3.2418E-14 S10 7.4983E-04 -3.5385E-05 4.1467E-06 -4.8182E-07 3.6363E-08 -1.7609E-09 5.2984E-11 -9.0366E-13 6.6212E-15 S11 2.9977E-03 -2.0379E-04 2.2947E-05 -2.3467E-06 1.7812E-07 -9.1036E-09 2.9025E-10 -4.9005E-12 2.1215E-14 S12 5.3370E-03 -3.3780E-04 1.6985E-05 -1.1795E-07 -5.1091E-08 3.5964E-09 -9.7069E-11 5.3305E-13 1.3784E-14 S13 -7.7082E-03 4.7809E-04 -6.2948E-05 5.2735E-06 -3.3746E-07 1.7050E-08 -6.7622E-10 1.8087E-11 -2.3513E-13 S14 -1.1638E-02 1.6452E-03 -2.3063E-04 2.4052E-05 -1.8027E-06 9.4164E-08 -3.2283E-09 6.4871E-11 -5.7511E-13

[0107] Table 8

[0108] Figure 8A The axial chromatic aberration curve of the optical imaging lens of Example 4 is shown, which indicates the deviation of the focal point 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.

[0109] Example 5

[0110] 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.

[0111] like Figure 9 As shown, the optical imaging lens includes, from the object side to the image side, a first lens E1, a second lens E2, a third lens E3, an aperture STO, a fourth lens E4, a fifth lens E5, a sixth lens E6, a seventh lens E7, a filter E8 and an imaging surface S17.

[0112] The first lens E1 has negative optical power, with its object-side surface S1 being convex and its image-side surface S2 being concave. The second lens E2 has positive optical power, with its object-side surface S3 being concave and its image-side surface S4 being convex. The third lens E3 has positive optical power, with its object-side surface S5 being convex and its image-side surface S6 being convex. The fourth lens E4 has negative optical power, with its object-side surface S7 being convex and its image-side surface S8 being concave. The fifth lens E5 has positive optical power, with its object-side surface S9 being convex and its image-side surface S10 being convex. The sixth lens E6 has positive optical power, with its object-side surface S11 being convex and its image-side surface S12 being convex. The seventh lens E7 has negative optical power, with its object-side surface S13 being convex and its image-side surface S14 being concave. The filter E8 has an object-side surface S15 and an image-side surface S16. Light from an object sequentially passes through surfaces S1 to S16 and is ultimately imaged on an imaging surface S17.

[0113] In this example, the total effective focal length f of the optical imaging lens is 8.04 mm, the total length TTL of the optical imaging lens is 34.63 mm, half the diagonal length ImgH of the effective pixel area on the imaging surface S17 of the optical imaging lens is 4.21 mm, and the maximum field of view FOV of the optical imaging lens is 60.7°.

[0114] Table 9 shows the basic parameters of the optical imaging lens of Example 5, where the units of curvature radius, thickness / distance, and focal length are all in millimeters (mm). Table 10 shows the high-order coefficients of each aspherical mirror surface that can be used in Example 5, where the surface shape of each aspherical surface can be defined by formula (1) given in Example 1 above.

[0115]

[0116]

[0117] Table 9

[0118] Face number A4 A6 A8 A10 A12 A14 A16 A18 A20 S1 -1.5157E-03 1.0055E-06 -5.8263E-07 1.0712E-07 -6.7570E-09 2.3237E-10 -4.6498E-12 5.0730E-14 -2.3443E-16 S2 -1.3215E-03 -1.8435E-05 2.8455E-06 -1.3053E-07 -1.3266E-09 7.3302E-10 -5.4865E-11 2.0397E-12 -3.9033E-14 S3 5.0919E-04 -5.0221E-06 -7.9633E-07 8.1896E-08 -7.1036E-09 3.7689E-10 -1.2418E-11 2.4450E-13 -3.0661E-15 S4 3.7714E-04 9.7641E-07 -4.5901E-07 4.0836E-08 -2.4294E-09 8.6873E-11 -1.6189E-12 7.8364E-15 1.9388E-16 S7 -3.2153E-03 2.1452E-04 -1.5637E-05 8.9506E-07 -3.8557E-08 1.2092E-09 -2.5660E-11 3.2384E-13 -1.8109E-15 S8 -6.6737E-03 5.8592E-04 -4.7678E-05 3.2011E-06 -1.6951E-07 6.3437E-09 -1.4385E-10 1.4846E-12 4.0916E-15 S9 -2.7473E-03 1.8759E-04 -8.4436E-06 2.5594E-07 -1.6631E-08 1.0101E-09 -2.7845E-11 2.2453E-13 2.9067E-15 S10 8.2967E-04 -2.8436E-05 2.7628E-06 -3.6684E-07 2.9210E-08 -1.4650E-09 4.5673E-11 -8.0645E-13 6.0904E-15 S11 3.1410E-03 -2.0146E-04 2.1230E-05 -2.1532E-06 1.6318E-07 -8.3444E-09 2.6713E-10 -4.5756E-12 2.2433E-14 S12 5.7223E-03 -4.3655E-04 4.0815E-05 -3.9724E-06 3.4742E-07 -2.2716E-08 9.7506E-10 -2.3849E-11 2.4441E-13 S13 -6.9295E-03 3.4871E-04 -3.3575E-05 2.6567E-07 2.2004E-07 -2.3284E-08 1.1549E-09 -2.9135E-11 2.8970E-13 S14 -1.1198E-02 1.5624E-03 -2.1381E-04 2.1031E-05 -1.4511E-06 6.8082E-08 -2.0317E-09 3.3924E-11 -2.3138E-13

[0119] Table 10

[0120] Figure 10A The axial chromatic aberration curve of the optical imaging lens of Example 5 is shown, which indicates the deviation of the focal point 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 10C The distortion curve of the optical imaging lens of Example 5 is shown, which represents the distortion magnitude values corresponding to different image heights. 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 10DIt can be seen that the optical imaging lens provided in Example 5 can achieve good imaging quality.

[0121] In summary, Examples 1 to 5 respectively satisfy the relationships shown in Table 11.

[0122]

[0123]

[0124] Table 11

[0125] The present application also provides an imaging device, wherein the electronic photosensitive element thereof may be a charge coupled device (CCD) or a complementary metal oxide semiconductor (CMOS). The imaging device may 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.

[0126] 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 the invention herein is not limited to the technical solutions formed by the 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 inventive concept. For example, a technical solution formed by replacing the above-mentioned features with (but not limited to) technical features having similar functions disclosed in this application.

Claims

1. An optical imaging lens, characterized in that: Along the optical axis from the object side to the image side, they include: a first lens having negative optical power, wherein the object-side surface is convex and the image-side surface is concave; a second lens having positive refractive power, whose object-side surface is concave and whose image-side surface is convex; The third lens has positive optical power, its object-side surface is convex, and its image-side surface is convex; a fourth lens element having negative optical power, whose object-side surface is convex and whose image-side surface is concave; a fifth lens element having positive optical power, with a convex object-side surface and a convex image-side surface; a sixth lens element having positive optical power, with its object-side surface being convex and its image-side surface being convex; and a seventh lens element having negative optical power, whose object-side surface is convex and whose image-side surface is concave; The third lens is a spherical lens made of glass; At least three lenses from the fourth lens to the seventh lens are made of plastic; The total effective focal length f of the optical imaging lens and the entrance pupil diameter EPD of the optical imaging lens satisfy the following conditions: 0.95≤f / EPD<1.0; The effective focal length f1 of the first lens, the curvature radius R1 of the object-side surface of the first lens, and the curvature radius R2 of the image-side surface of the first lens satisfy the following conditions: -1.89≤f1 / (R1+R2)≤-1.49; and The number of lenses having optical power in the optical imaging lens is seven.

2. The optical imaging lens according to claim 1, wherein: The effective focal length f5 of the fifth lens, the effective focal length f3 of the third lens, and the effective focal length f4 of the fourth lens satisfy the following: 1.18≤f5 / (f3+f4)≤1.

95.

3. The optical imaging lens according to claim 1, wherein: The total effective focal length f of the optical imaging lens, the effective focal length f6 of the sixth lens, and the effective focal length f7 of the seventh lens satisfy the following: -1.29≤f / (f6+f7)≤-0.

85.

4. The optical imaging lens according to claim 1, wherein: A curvature radius R3 of the object-side surface of the second lens, a curvature radius R4 of the image-side surface of the second lens, a curvature radius R5 of the object-side surface of the third lens, and a curvature radius R6 of the image-side surface of the third lens satisfy: 1.07≤(R5+R6) / (R3+R4)≤1.

86.

5. The optical imaging lens according to claim 1, wherein: A curvature radius R7 of the object-side surface of the fourth lens and a curvature radius R8 of the image-side surface of the fourth lens satisfy: 1.74≤(R7+R8) / (R7-R8)≤2.

07.

6. The optical imaging lens according to claim 1, wherein: A distance T12 between the first lens and the second lens on the optical axis, a distance T34 between the third lens and the fourth lens on the optical axis, and a distance T56 between the fifth lens and the sixth lens on the optical axis satisfy the following conditions: 1.00≤T12 / (T34+T56)≤1.

33.

7. The optical imaging lens according to claim 1, wherein: A combined focal length f67 of the sixth lens and the seventh lens and a combined focal length f345 of the third lens, the fourth lens and the fifth lens satisfy the following: 1.35≤f67 / f345≤1.

70.

8. The optical imaging lens according to claim 1, wherein: The distance SAG42 from the intersection of the image side surface of the fourth lens and the optical axis to the effective radius vertex of the image side surface of the fourth lens on the optical axis, the distance SAG51 from the intersection of the object side surface of the fifth lens and the optical axis to the effective radius vertex of the object side surface of the fifth lens on the optical axis, and the distance SAG52 from the intersection of the image side surface of the fifth lens and the optical axis to the effective radius vertex of the image side surface of the fifth lens on the optical axis satisfy: 1.93≤SAG42 / (SAG51+SAG52)≤2.

26.

9. The optical imaging lens according to claim 1, wherein: The distance SAG71 from the intersection of the object side surface of the seventh lens and the optical axis to the vertex of the effective radius of the object side surface of the seventh lens on the optical axis and the distance SAG72 from the intersection of the image side surface of the seventh lens and the optical axis to the vertex of the effective radius of the image side surface of the seventh lens on the optical axis satisfy: 1.68≤SAG72 / SAG71≤2.

46.

10. The optical imaging lens according to claim 1, wherein: An edge thickness ET1 of the first lens, an edge thickness ET3 of the third lens, and an edge thickness ET5 of the fifth lens satisfy the following: 1.10≤ET1 / (ET3+ET5)≤1.

28.

11. The optical imaging lens according to claim 1, wherein: An edge thickness ET4 of the fourth lens, an edge thickness ET6 of the sixth lens, and an edge thickness ET7 of the seventh lens satisfy the following: 1.04≤ET4 / (ET6+ET7)≤1.

15.

12. The optical imaging lens according to any one of claims 1 to 11, wherein: A distance TTL from the object side surface of the first lens to the imaging surface of the optical imaging lens on the optical axis and an entrance pupil diameter EPD of the optical imaging lens satisfy the following relationship: 3.56≤TTL / EPD≤4.

10.

13. The optical imaging lens according to any one of claims 1 to 11, wherein: The optical imaging lens further includes a stop disposed between the third lens and the fourth lens. A distance SL from the aperture to the imaging plane of the optical imaging lens on the optical axis and a distance TTL from the object side surface of the first lens to the imaging plane of the optical imaging lens on the optical axis satisfy: 1.80≤TTL / SL≤1.94.

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