Optical lens, imaging module and electronic device

Abstract

The present application relates to an optical lens, an imaging module, and an electronic device. The optical lens sequentially includes, from the object side to the image side along the optical axis, a first lens with positive optical power, the object side surface of which is convex near the optical axis; a second lens with negative optical power; a third lens with optical power, the image side surface of which is concave near the optical axis; a fourth lens with negative optical power, the object side surface of which is concave near the optical axis; a fifth lens with optical power; a sixth lens with negative optical power; and a seventh lens with positive optical power, the object side surface of which is convex near the optical axis, and both the object side surface and the image side surface are aspherical surfaces, and at least one of the object side surface and the image side surface of the seventh lens includes at least one inflection point. When the above optical lens satisfies specific relationships, it can achieve a balance among miniaturization, long focal length, and high imaging quality.

Description

Technical Field

[0001] The present invention relates to the field of optical imaging technology, and particularly to an optical lens, an imaging module, and an electronic device. Background Art

[0002] In recent years, with the continuous development of scientific and technological innovation, camera modules have been increasingly widely used in various intelligent electronic products, vehicle-mounted devices, identification systems, and entertainment and sports equipment. The requirements for lens miniaturization and high-quality imaging performance are increasing day by day. On the other hand, with the improvement of semiconductor manufacturing processes, the pixel size of photosensitive elements is getting smaller and smaller, which also poses higher requirements for the resolution performance of mobile phone lenses. Lightweight, short, and excellent-function electronic products will inevitably become a development trend of consumer electronics.

[0003] A mobile phone in daily use is equipped with one, two, or even more than three lenses with different imaging functions to enrich the shooting functions. The optical lens among them usually consists of four to six lenses. However, the focal length of such optical lenses is relatively large, and the imaging quality of distant details cannot be guaranteed. Although the aberration can be further corrected by increasing the number of lenses, this will result in a larger lens size and higher price, making it difficult to meet the market demand. Summary of the Invention

[0004] Based on this, in view of the problem that traditional optical lenses are difficult to achieve a balance among miniaturization, long focal length, and high imaging quality, it is necessary to provide an improved optical lens.

[0005] An optical lens, which sequentially includes, from the object side to the image side along the optical axis,

[0006] A first lens with positive optical power, the object side surface of the first lens near the optical axis is a convex surface;

[0007] A second lens with negative optical power;

[0008] A third lens with optical power, the image side surface of the third lens near the optical axis is a concave surface;

[0009] A fourth lens with negative optical power, the object side surface of the fourth lens near the optical axis is a concave surface;

[0010] A fifth lens with optical power;

[0011] A sixth lens with negative optical power;

[0012] A seventh lens with positive optical power, the object side surface of the seventh lens near the optical axis is a convex surface, and both its object side surface and image side surface are aspherical surfaces, and at least one surface of the object side surface and image side surface of the seventh lens contains at least one inflection point;

[0013] The optical lens satisfies the following relational expressions:

[0014] 0.5 < CT5 / T56 < 2;

[0015] Wherein, CT5 represents the thickness of the fifth lens on the optical axis, and T56 represents the distance on the optical axis from the image side of the fifth lens to the object side of the sixth lens.

[0016] For the above optical lens, by selecting an appropriate number of lenses and reasonably distributing the optical power and surface shape of each lens, the aberration can be effectively corrected, the imaging resolution of the lens can be enhanced, and the imaging quality can be improved; in addition, when the above relationships are satisfied, the thickness of each lens and the interval between adjacent lenses can be reasonably configured, which is conducive to improving the telephoto ability of the lens while meeting the miniaturization requirement, reducing the sensitivity of the lens, and improving the assembly yield of the lens.

[0017] In one embodiment, the optical lens satisfies the following relational expressions:

[0018] -1 < f123 / f4567 < -0.5; wherein, f123 represents the combined focal length of the first lens to the third lens, and f4567 represents the combined focal length of the fourth lens to the eighth lens.

[0019] When the above relationships are satisfied, the combined focal length of the first, second, and third lenses and the combined focal length of the fourth, fifth, sixth, and seventh lenses can be reasonably configured, which is conducive to the optical lens to balance the system spherical aberration, improve the imaging quality of the on-axis field of view, and at the same time, the principal plane of the lens can be far away from the imaging plane, strengthening the telephoto ability of the lens.

[0020] In one embodiment, the optical lens satisfies the following relational expressions:

[0021] 0.6 < TD / f < 1; wherein, TD represents the distance on the optical axis from the object side of the first lens to the imaging plane of the seventh lens, and f represents the effective focal length of the optical lens.

[0022] When the above relationships are satisfied, the optical power of the lens and the shape of the lens can be reasonably configured, which is helpful to improve the telephoto ability of the lens while meeting the miniaturization requirement. When TD / f exceeds the upper limit, it is easy to cause the structure of the lens to be not compact enough, resulting in a longer total length of the lens, which is not conducive to the assembly of the lens; when TD / f is lower than the lower limit, it is easy to cause the total length of the lens to be too small, the lens arrangement to be crowded, which is not conducive to the aberration correction of the lens, and the imaging quality of the telephoto is also poor.

[0023] In one embodiment, the optical lens satisfies the following relational expressions:

[0024] 0.3 < f1 / f < 0.8; where f1 represents the effective focal length of the first lens.

[0025] When the above relationship is satisfied, the optical power of the first lens can be reasonably configured, which is beneficial to improving the telephoto ability of the lens, reducing the spherical aberration of the lens, and improving the clarity of the image plane. When f1 / f exceeds the upper limit, the positive optical power of the first lens is small, and the optical power distribution of the lens is uneven, resulting in insufficient telephoto ability of the lens; when f1 / f is lower than the lower limit, the optical power of the first lens is too large, making it difficult to correct the lens aberration and reducing the imaging quality.

[0026] In one embodiment, the optical lens satisfies the following relational expression:

[0027] -5 < f2 / f1 < -1; where f1 represents the effective focal length of the first lens, and f2 represents the effective focal length of the second lens.

[0028] The first lens is a positive lens, which can provide positive optical power for the lens, facilitating better convergence of light into the lens, thus ensuring the telephoto characteristics of the lens; the second lens is a negative lens, which can provide negative optical power for the lens, thus facilitating light divergence; when within the range of the above relational expression, the aberration can be effectively corrected, the principal plane of the lens can be shifted forward, and the focal length can be increased, ensuring the telephoto imaging characteristics within a small field of view of the lens.

[0029] In one embodiment, the optical lens satisfies the following relational expression:

[0030] 1 < f7 / f < 10; where f7 represents the effective focal length of the seventh lens.

[0031] When the above relationship is satisfied, the seventh lens provides positive optical power for the lens, which is beneficial to achieving a long focal length, further enhancing the telephoto function of the lens, and achieving the effect of forming a large target image within a narrow field of view.

[0032] In one embodiment, the optical lens satisfies the following relational expression:

[0033] 0.5 < RS9 / RS10 < 2; where RS9 represents the radius of curvature of the object side of the fifth lens on the optical axis, and RS10 represents the radius of curvature of the image side of the fifth lens on the optical axis.

[0034] When the above relationships are satisfied, the curvature radii of the object side and the image side of the fifth lens on the optical axis can be reasonably configured, which is beneficial to ensuring the processing feasibility of the fifth lens. At the same time, it also helps to correct spherical aberration and astigmatism, and improve the imaging quality of the lens. When RS9 / RS10 is lower than the lower limit, the object side of the fifth lens is too curved, which easily leads to poor forming of the fifth lens and reduces the production yield. When RS9 / RS10 exceeds the upper limit, the object side of the fifth lens is too smooth, resulting in difficult correction of aberration and excessive off-axis field astigmatism, affecting the imaging quality of the lens.

[0035] In one embodiment, the optical lens satisfies the following relational expression:

[0036] -5 < (RS11 - RS12) / (RS11 + RS12) < 8; where RS11 represents the curvature radius of the object side of the sixth lens on the optical axis, and RS12 represents the curvature radius of the image side of the sixth lens on the optical axis.

[0037] When the above relationships are satisfied, the thickness of the sixth lens can be relatively uniform, which is beneficial to reducing the sensitivity of the lens and making the overall imaging quality from the center to the edge of the image plane clearer.

[0038] In one embodiment, the optical lens satisfies the following relational expression:

[0039] 1.6 < CT1 / (CT2 + CT3) < 3; where CT1 represents the thickness of the first lens on the optical axis, CT2 represents the thickness of the second lens on the optical axis, and CT3 represents the thickness of the third lens on the optical axis.

[0040] When the above relationships are satisfied, it is beneficial to reduce the sensitivity of the first lens to the environment. At the same time, the center thicknesses of the first, second, and third lenses can be reasonably configured, which helps to realize the miniaturization of the lens and avoid the lens being too thin to affect the strength of the lens and thus the manufacturing yield of the lens.

[0041] In one embodiment, the optical lens satisfies the following relational expression:

[0042] 0 < f4 / RS7 < 8; where f4 represents the effective focal length of the fourth lens, and RS7 represents the curvature radius of the object side of the fourth lens on the optical axis.

[0043] When the above relationships are satisfied, the fourth lens provides a negative optical power for the lens, which is beneficial to balancing the positive spherical aberration generated by the front positive lens group. At the same time, it can also effectively reduce the incident angle of the off-axis field light entering the photosensitive chip, improve the astigmatism of the off-axis field, reduce the lens aberration, and improve the imaging quality.

[0044] In one embodiment, the optical lens satisfies the following relational expression:

[0045] FNO ≤ 2.2; where FNO represents the aperture number of the optical lens.

[0046] When the above relationship is satisfied, the lens can have a larger aperture, thereby increasing the light transmission of the lens, enabling the lens to obtain clear detail information of the photographed object even in a darker environment or when the light is insufficient, and improving the imaging quality.

[0047] This application also provides an image pickup module.

[0048] An image pickup module includes the optical lens and the photosensitive element as described above, and the photosensitive element is disposed on the image side of the optical lens.

[0049] The above image pickup module can use the aforementioned optical lens to achieve long-distance shooting, and the captured images have high pixels and good quality. At the same time, the image pickup module also has the structural characteristics of being miniaturized and lightweight, which is convenient to be adapted to devices with limited sizes such as mobile phones and tablets, thus better meeting the market demand.

[0050] This application also provides an electronic device. [[ID=ID=18]]

[0051] An electronic device includes a housing and the image pickup module as described above, and the image pickup module is installed on the housing.

[0052] The above electronic device has the characteristics of being lightweight, and can use the aforementioned image pickup module to achieve high-definition long-distance scene shooting, which is beneficial to improving the shooting experience of users. Description of the Drawings

[0053] Figure 1 Shows a schematic structural diagram of the optical lens according to Embodiment 1 of this application;

[0054] Figure 2 Respectively show the longitudinal spherical aberration curve, astigmatism curve and distortion curve of the optical lens according to Embodiment 1;

[0055] Figure 3 Shows a schematic structural diagram of the optical lens according to Embodiment 2 of this application;

[0056] Figure 4 Respectively show the longitudinal spherical aberration curve, astigmatism curve and distortion curve of the optical lens according to Embodiment 2;

[0057] Figure 5 Shows a schematic structural diagram of the optical lens according to Embodiment 3 of this application;

[0058] Figure 6 Respectively show the longitudinal spherical aberration curve, astigmatism curve and distortion curve of the optical lens according to Embodiment 3;

[0059] Figure 7 Shows a schematic structural diagram of the optical lens according to Embodiment 4 of the present application;

[0060] Figure 8 Respectively show the longitudinal spherical aberration curve graph, astigmatism curve graph, and distortion curve graph of the optical lens according to Embodiment 4;

[0061] Figure 9 Shows a schematic structural diagram of the optical lens according to Embodiment 5 of the present application;

[0062] Figure 10 Respectively show the longitudinal spherical aberration curve graph, astigmatism curve graph, and distortion curve graph of the optical lens according to Embodiment 5;

[0063] Figure 11 Shows a schematic structural diagram of the optical lens according to Embodiment 6 of the present application;

[0064] Figure 12 Respectively show the longitudinal spherical aberration curve graph, astigmatism curve graph, and distortion curve graph of the optical lens according to Embodiment 6;

[0065] Figure 13 Shows a schematic structural diagram of the optical lens according to Embodiment 7 of the present application;

[0066] Figure 14 Respectively show the longitudinal spherical aberration curve graph, astigmatism curve graph, and distortion curve graph of the optical lens according to Embodiment 7;

[0067] Figure 15 Shows a schematic diagram of the imaging module according to an embodiment of the present application;

[0068] Figure 16 Shows a schematic diagram of an electronic device applying the imaging module according to an embodiment of the present application. Detailed Embodiments

[0069] For ease of understanding of the present invention, the present invention will be described more comprehensively below with reference to the relevant accompanying drawings. Preferred embodiments of the present invention are given in the accompanying drawings. However, the present invention can be implemented in many different forms and is not limited to the embodiments described herein. On the contrary, the purpose of providing these embodiments is to understand the disclosure of the present invention more thoroughly and comprehensively.

[0070] It should be noted that when an element is referred to as "fixed to" another element, it can be directly on the other element or there may also be an intermediate element. When an element is considered to be "connected to" another element, it can be directly connected to the other element or there may be an intermediate element at the same time. The terms "vertical", "horizontal", "left", "right", "upper", "lower", "front", "rear", "circumferential" and similar expressions used herein are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the present invention.

[0071] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those of ordinary skill in the technical field to which this invention belongs. The terms used in the specification of the present invention are only for the purpose of describing specific embodiments, and are not intended to limit the present invention. The term "and / or" used herein includes any and all combinations of one or more of the related listed items.

[0072] In this specification, the expressions such as first, second, third, etc. are only used to distinguish one feature from another feature, and do not represent any limitation to the feature. Therefore, without departing from the teachings of the present application, the first lens discussed below may also be referred to as the second lens or the third lens. For the convenience of description, the spherical or aspherical shapes shown in the drawings are shown by way of example. That is, the spherical or aspherical shapes are not limited to the spherical or aspherical shapes shown in the drawings. The drawings are only examples and are not drawn strictly to scale.

[0073] In this specification, the space on the side where the object is located relative to the optical element is called the object side of the optical element. Correspondingly, the space on the side where the image formed by the object is located relative to the optical element is called the image side of the optical element. The surface closest to the object in each lens is called the object side surface, and the surface closest to the imaging surface in each lens is called the image side surface. And the direction from the object side to the image side is defined as the positive direction of the distance.

[0074] In addition, in the following description, when the lens surface is convex and the position of the convex surface is not defined, it means that at least the area near the optical axis of the lens surface is convex; when the lens surface is concave and the position of the concave surface is not defined, it means that at least the area near the optical axis of the lens surface is concave. Here, the area near the optical axis refers to the area near the optical axis. Specifically, the convexity and concavity of the lens surface area are determined by the intersection point of the light rays parallel to the area passing through the image side or the object side of the optical axis. For example, when the parallel light rays pass through this area, the light rays will converge towards the image side and the intersection point with the optical axis is on the image side, then this area is convex; on the contrary, if the light rays diverge after passing through this area and the intersection point of the extension line of the light rays and the optical axis is on the object side, then this area is concave. In addition, the lens includes an area near the optical axis, an area near the circumference, and an extension part for fixing the lens. Ideally, the imaging light rays do not pass through the extension part, so the area range from the area near the optical axis to the area near the circumference can be defined as the effective aperture range of the lens. In the following embodiments, some extension parts are omitted for the sake of simplicity of the drawings. Further, the method for determining the range of the area near the optical axis, the area near the circumference, or multiple areas is as follows:

[0075] First, a center point is defined as the intersection point of the lens surface and the optical axis. The distance from the center point to the boundary of the effective aperture range of the lens is the effective semi-aperture of the lens, and an inflection point is a point on the lens surface that is not on the optical axis. The tangent line passing through the inflection point is perpendicular to the optical axis (that is, the surface shapes on both sides of the inflection point on the lens surface are opposite). If there are several inflection points radially outward from the center point of the lens, they are the first inflection point, the second inflection point in sequence, and the inflection point farthest from the center point within the effective aperture range of the lens is the Nth inflection point. The range between the center point and the first inflection point is defined as the area near the optical axis, the area radially outward from the Nth inflection point is the area near the circumference, and the area between the first inflection point and the Nth inflection point is divided into different areas according to each inflection point; if there is no inflection point on the lens surface, the area near the optical axis is defined as the area corresponding to 0-50% of the effective semi-aperture, and the area near the circumference is defined as the area corresponding to 50%-100% of the effective semi-aperture.

[0076] The features, principles, and other aspects of the present application will be described in detail below.

[0077] Please refer to Figure 1 、 Figure 3 、 Figure 5 、 Figure 7 、 Figure 9 、 Figure 11 and Figure 13, an embodiment of the present application provides an optical lens that can balance long-distance imaging, high pixel count, and miniaturization. The optical lens includes 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 in sequence along the optical axis from the object side to the image side starting from the first lens to the seventh lens, and the imaging surface of the optical lens is located on the image side of the seventh lens.

[0078] Furthermore, a diaphragm is provided in the optical lens to better control the size of the incident light beam and improve the imaging quality of the optical lens. Specifically, the diaphragm is disposed between the third lens and the fourth lens. Specifically, the diaphragm is an aperture stop. The aperture stop can be located on the surface of the lens (such as the object side surface and the image side surface) and form an interaction relationship with the lens. For example, an opaque coating is applied on the surface of the lens to form an aperture stop on this surface; or a clamping member is used to fixedly clamp the surface of the lens, and the clamping member structure located on this surface can limit the width of the imaging light beam of the on-axis object point, thereby forming an aperture stop on this surface.

[0079] Specifically, the first lens has a positive focal power, and its object side surface near the optical axis is convex, which is beneficial for light to converge into the lens better, thereby enhancing the telephoto ability of the lens, reducing the spherical aberration of the lens, and improving the clarity of the image plane;

[0080] The second lens has a negative focal power, which is beneficial for light to diverge, increasing the focal length of the lens, ensuring the telephoto imaging characteristics within a small field of view of the lens, and at the same time being beneficial for correcting the aberration generated by the refraction of light by the first lens, thereby improving the imaging quality.

[0081] The third lens has a focal power, and the image side surface of the third lens near the optical axis is concave. Specifically, the third lens can have a positive focal power, in which case the light can be further converged, thereby reducing the distance between the third lens and the diaphragm and realizing the miniaturization of the lens; the third lens can also have a negative focal power, in which case the light emerging from the first and second lenses can be further widened, so as to fill the pupil and be transmitted to the high-pixel image plane to obtain a wider field of view range, while reflecting the high-pixel characteristics of the lens.

[0082] The fourth lens has a negative focal power, and its object side surface near the optical axis is concave, which can effectively disperse the configuration of the focal power, balance the positive spherical aberration generated by the front positive lens group, and at the same time help reduce the incident angle of the marginal field light into the photosensitive chip, thereby improving the astigmatism of the off-axis field and reducing the lens aberration, further improving the imaging quality.

[0083] The fifth lens has a focal power, which can effectively balance the system aberration and improve the imaging quality of the lens. Specifically, when the fifth lens has a positive focal power, it helps to strengthen the long focal length characteristics of the lens, especially to improve the axial spherical aberration of the system; when the fifth lens has a negative focal power, it can improve the off-axis field curvature aberration of the lens, making the lens form a uniform and clear image on the imaging surface.

[0084] The sixth lens has a negative focal power, which helps to improve the off-axis astigmatism aberration of the lens, improve the imaging quality, and the shape of the sixth lens is also beneficial to the process manufacturing.

[0085] The seventh lens has a positive focal power, and the object side near the optical axis is a convex surface. In this way, it is beneficial to achieve a long focal length, thereby strengthening the telephoto function of the lens, and achieving the effect of forming a large target image within a narrow field of view. Further, both the object side and the image side of the seventh lens are aspherical surfaces, and at least one surface of the object side and the image side contains at least one inflection point.

[0086] Specifically, the optical lens also satisfies the following relationship: 0.5 < CT5 / T56 < 2, where CT5 represents the thickness of the fifth lens on the optical axis, and T56 represents the distance on the optical axis from the image side of the fifth lens to the object side of the sixth lens. CT5 / T56 can be 0.6, 0.7, 0.8, 0.9, 1.0, 1.05, 1.1, 1.15, 1.2, 1.3, 1.4, 1.6 or 1.8. When the above relationship is satisfied, the thickness of the fifth lens and the air gap between the fifth lens and the sixth lens can be reasonably configured, which is beneficial to increasing the strength of the fifth lens and making the arrangement of the lens structure more reasonable, thereby reducing the assembly sensitivity of the lens. When CT5 / T56 exceeds the upper limit, it is easy to cause the fifth lens to be too thick, which is not conducive to the miniaturization of the lens; when CT5 / T56 is lower than the lower limit, it is easy to cause the fifth lens to be too thin. Although it is beneficial to shorten the total length of the lens, it will increase the sensitivity of the lens, thereby affecting the assembly yield of the lens.

[0087] When the above optical lens is used for imaging, the light emitted or reflected by the object to be photographed enters the optical lens from the object side direction, and sequentially passes through the first lens, the second lens, the third lens, the fourth lens, the fifth lens, the sixth lens and the seventh lens, and finally converges on the imaging surface.

[0088] The above optical lens can effectively correct aberrations, enhance the imaging resolution ability of the lens, and improve the imaging quality by selecting an appropriate number of lenses and reasonably distributing the focal power and surface type of each lens; in addition, when the above specific relationship is satisfied, the thickness of each lens and the interval between adjacent lenses can be reasonably configured, which is beneficial to improving the telephoto ability of the lens while meeting the miniaturization requirement, reducing the sensitivity of the lens, and improving the assembly yield of the lens.

[0089] In an exemplary embodiment, the optical lens satisfies the following relational expression: -1 < f123 / f4567 < -0.5; where f123 represents the combined focal length of the first lens to the third lens, and f4567 represents the combined focal length of the fourth lens to the eighth lens. f123 / f4567 can be -0.9, -0.85, -0.8, -0.78, -0.76, -0.74, -0.72, -0.7, or -0.6. When the above relationship is satisfied, the combined focal lengths of the first, second, and third lenses and the combined focal lengths of the fourth, fifth, sixth, and seventh lenses can be reasonably configured, which is conducive to the optical lens balancing the system spherical aberration, improving the imaging quality of the on-axis field of view, and at the same time, the principal plane of the lens can be far from the imaging plane, enhancing the telephoto ability of the lens. When f123 / f4567 exceeds the range, the power distribution of the front and rear lens groups of the lens is unreasonable, which is not conducive to balancing the spherical aberration, the imaging quality is reduced, and it is also not conducive to enhancing the telephoto ability of the lens.

[0090] In an exemplary embodiment, the optical lens satisfies the following relational expression: 0.6 < TD / f < 1, where TD represents the distance on the optical axis from the object side of the first lens to the imaging plane of the seventh lens, and f represents the effective focal length of the optical lens. TD / f can be 0.7, 0.75, 0.8, 0.82, 0.84, 0.86, 0.88, 0.9, 0.92, 0.94, 0.96, or 0.98. When the above relationship is satisfied, the power of the lens and the shape of the lens can be reasonably configured, which helps to improve the telephoto ability of the lens while meeting the miniaturization requirement. When TD / f exceeds the upper limit, it is easy to cause the structure of the lens to be not compact enough, resulting in a longer overall length of the lens, which is not conducive to the assembly of the lens elements; when TD / f is lower than the lower limit, it is easy to cause the overall length of the lens to be too small, the lens arrangement to be crowded, which is not conducive to the aberration correction of the lens, and the imaging quality of the telephoto is poor.

[0091] In an exemplary embodiment, the optical lens satisfies the following relational expression: 0.3 < f1 / f < 0.8; where f1 represents the effective focal length of the first lens. f1 / f can be 0.4, 0.5, 0.52, 0.54, 0.56, 0.58, 0.6, 0.62, 0.64, 0.66, 0.7, or 0.75. When the above relationship is satisfied, the power of the first lens can be reasonably configured, which is conducive to improving the telephoto ability of the lens, reducing the spherical aberration of the lens, and improving the clarity of the image plane. When f1 / f exceeds the upper limit, the positive power of the first lens is small, and the power distribution of the lens is uneven, resulting in insufficient telephoto ability of the lens; when f1 / f is lower than the lower limit, the power of the first lens is too large, making it difficult to correct the aberration of the lens and reducing the imaging quality.

[0092] In an exemplary embodiment, the optical lens satisfies the following relational expression: -5 < f2 / f1 < -1; where f1 represents the effective focal length of the first lens, and f2 represents the effective focal length of the second lens. f2 / f1 can be -4, -3.5, -3, -2.8, -2.6, -2.4, -2.2, -2, or -1.5. The first lens is a positive lens, which can provide a positive optical power for the lens, facilitating better convergence of light into the lens, thus ensuring the long focal length characteristics of the lens; the second lens is a negative lens, which can provide a negative optical power for the lens, thus facilitating light divergence; when within the range satisfying the above relational expression, aberration can be effectively corrected, the positive optical power of the lens can be shifted forward, and the focal length can be increased, ensuring the telephoto imaging characteristics within a small field of view of the lens. When f2 / f1 exceeds the upper limit, the positive optical power of the first lens is too small, and the negative optical power of the second lens is too large, which is not conducive to light convergence, and the imaging quality of the lens is poor; when f2 / f1 is lower than the lower limit, the positive optical power of the first lens is too large, and the negative optical power of the second lens is too small, which is not conducive to aberration correction and is also not conducive to increasing the focal length of the lens, resulting in insufficient telephoto ability of the lens.

[0093] In an exemplary embodiment, the optical lens satisfies the following relational expression: 1 < f7 / f < 10; where f7 represents the effective focal length of the seventh lens. f7 / f can be 1.4, 1.6, 1.8, 2, 2.2, 3, 4, 5, 6, 7, 8, 9, or 9.95. When satisfying the above relationship, the seventh lens provides a positive optical power for the lens, which is conducive to achieving a long focal length, thereby further enhancing the telephoto function of the lens and achieving the effect of forming a larger target image within a relatively narrow field of view. When f7 / f exceeds the upper limit, the positive optical power of the seventh lens is too small, which is not conducive to light convergence, and the imaging quality of the lens is poor; when f7 / f is lower than the lower limit, the positive optical power of the seventh lens is too large, which is not conducive to achieving the telephoto function of a long focal length.

[0094] In an exemplary embodiment, the optical lens satisfies the following relational expression: 0.5 < RS9 / RS10 < 2; where RS9 represents the radius of curvature of the object side of the fifth lens at the optical axis, and RS10 represents the radius of curvature of the image side of the fifth lens at the optical axis. RS9 / RS10 can be 0.6, 0.8, 0.9, 1.0, 1.1, 1.2, 1.3, 1.4, 1.5, 1.6, or 1.8. When satisfying the above relationship, the radius of curvature of the object side and the image side of the fifth lens at the optical axis can be reasonably configured, which is conducive to ensuring the processing feasibility of the fifth lens and also helps to correct spherical aberration and astigmatism, improving the imaging quality of the lens. When RS9 / RS10 is lower than the lower limit, the object side of the fifth lens is too curved, which easily leads to poor forming of the fifth lens and reduces the production yield; when RS9 / RS10 exceeds the upper limit, the object side of the fifth lens is too smooth, resulting in difficult aberration correction and excessive astigmatism in the off-axis field of view, affecting the imaging quality of the lens.

[0095] In an exemplary embodiment, the optical lens satisfies the following relational expression:

[0096] -5 < (RS11 - RS12) / (RS11 + RS12) < 8; where RS11 represents the radius of curvature of the object side of the sixth lens on the optical axis, and RS12 represents the radius of curvature of the image side of the sixth lens on the optical axis. (RS11 - RS12) / (RS11 + RS12) can be -4, -3.5, -1, 1, 3, 3.3, 3.6, 3.9, 4.5, 5, 5.3, 5.6, 6, or 7. When the above relationship is satisfied, the thickness of the sixth lens can be relatively uniform, which is beneficial to reducing the sensitivity of the lens and making the overall imaging quality from the center to the edge of the image plane clearer. When (RS11 - RS12) / (RS11 + RS12) exceeds the range, it is easy to cause the thickness of the sixth lens to be too thin, which is not conducive to the processing of a single lens and is also not conducive to reducing the sensitivity of the lens.

[0097] In an exemplary embodiment, the optical lens satisfies the following relational expression: 1.6 < CT1 / (CT2 + CT3) < 3; where CT1 represents the thickness of the first lens on the optical axis, CT2 represents the thickness of the second lens on the optical axis, and CT3 represents the thickness of the third lens on the optical axis. CT1 / (CT2 + CT3) can be 1.8, 1.9, 2.0, 2.1, 2.2, 2.3, 2.4, 2.5, 2.6, 2.8, or 2.9. When the above relationship is satisfied, it is beneficial to reducing the sensitivity of the first lens to the environment, and at the same time, the central thicknesses of the first, second, and third lenses can be reasonably configured, which is conducive to realizing the miniaturization of the lens and avoiding the lens being too thin and affecting the strength of the lens and thus the manufacturing yield of the lens. When CT1 / (CT2 + CT3) exceeds the range, it is easy to cause the first, second, and third lenses to be too thick or too thin, which is not conducive to reducing the sensitivity of the lens, the manufacturing yield of the lens is not high, and it is also not conducive to the miniaturization of the lens.

[0098] In an exemplary embodiment, the optical lens satisfies the following relational expression: 0 < f4 / RS7 < 8; where f4 represents the effective focal length of the fourth lens, and RS7 represents the radius of curvature of the object side surface of the fourth lens at the optical axis. f4 / RS7 can be 0.5, 1, 1.5, 2, 2.5, 3, 3.5, 4, 4.5, 5, 6, or 7. When the above relationship is satisfied, the fourth lens provides a negative optical power for the lens, which is beneficial to balancing the positive spherical aberration of the front positive lens group. At the same time, it can also effectively reduce the incident angle of the marginal field light entering the photosensitive chip, so as to improve the astigmatism of the off-axis field, reduce the lens aberration, and improve the imaging quality. When f4 / RS7 exceeds the upper limit, the negative optical power of the fourth lens is too small, which is not conducive to balancing the positive spherical aberration of the front lens group. In addition, at this time, the object side surface of the fourth lens is too curved, which is not conducive to reducing the incident angle of the marginal field light entering the photosensitive chip. Therefore, it is not conducive to improving the lens aberration and the imaging quality is poor.

[0099] In an exemplary embodiment, the optical lens satisfies the following relational expression: FNO ≤ 2.2; where FNO represents the f-number of the optical lens. FNO can be 1.9, 1.95, 2, 2.1, 2.15, or 2.2. When the above relationship is satisfied, the lens can have a larger aperture, thereby increasing the light transmission amount of the lens, so that the lens can also obtain clear detail information of the object to be photographed in a darker environment or when the light is insufficient, and improve the imaging quality. When FNO exceeds the range, the aperture of the lens is small, resulting in a darker photographed image and less detail information of the object to be photographed, and the imaging quality is not high.

[0100] In an exemplary embodiment, the object side surface and the image side surface of the first lens to the seventh lens are both aspherical surfaces. The characteristics of an aspherical lens are that the curvature changes continuously from the center of the lens to the periphery of the lens. Different from a spherical lens with a constant curvature from the center of the lens to the periphery of the lens, an aspherical lens has better radius of curvature characteristics and has the advantages of improving marginal aberration and astigmatism field curvature. Through the above method, the flexibility of lens design can be improved, and the aberration can be effectively corrected, and the imaging quality of the optical lens can be improved. Setting the object side surface and the image side surface of the first lens to the seventh lens as aspherical surfaces can better correct the aberration generated during the light transmission process. It should be noted that on the premise of not departing from the technical solution of the optical lens of the present application, the surfaces of each lens can also be any combination of spherical and aspherical surfaces, and the present application does not limit this.

[0101] In an exemplary embodiment, a filter is further disposed between the seventh lens and the imaging surface of the optical lens to filter out light in non-working wavelength bands, thereby preventing the phenomenon of false colors or ripples caused by the interference of light in non-working wavelength bands and avoiding imaging color distortion. Specifically, the filter can be an infrared filter, and its material is glass.

[0102] In an exemplary embodiment, the materials of the lenses in the optical lens can all be glass or all be plastic. The plastic lenses can reduce the weight of the optical lens and lower the production cost, while the glass lenses can endow the optical lens with better temperature tolerance characteristics and excellent optical performance. Further, when the optical lens is applied to portable electronic devices such as mobile phones and tablets, the material of each lens is preferably plastic to reduce the weight of the electronic device. It should be noted that the materials of the lenses in the optical lens can also be any combination of glass and plastic, and do not necessarily have to be all glass or all plastic.

[0103] In an exemplary embodiment, the optical lens may further include a protective glass. The protective glass is disposed on the image side of the sixth lens or the image side of the filter, which plays a role in protecting the photosensitive element and can also prevent the photosensitive element from being contaminated by dust, further ensuring the imaging quality. It should be pointed out that when the optical lens is applied to electronic devices such as mobile phones and tablets, the protective glass may not be provided to further reduce the weight of the electronic device.

[0104] The optical lens of the above embodiment of the present application can adopt multiple lenses, such as the seven lenses described above. By reasonably allocating the focal length, optical power, surface shape, thickness of each lens, and the on-axis distance between each lens, etc., the above optical lens can have a long focal length, a small overall length, and high imaging quality, and also has a large aperture (FNO can be 1.95) and a light weight, so as to better meet the application requirements of electronic devices such as mobile phones, tablets, and vehicle-mounted lenses. However, those skilled in the art should understand that without departing from the technical solution claimed in the present application, the number of lenses constituting the optical lens can be changed to obtain the various results and advantages described in this specification.

[0105] The following further describes specific embodiments of the optical lens applicable to the above embodiments with reference to the accompanying drawings.

[0106] Embodiment 1

[0107] The following refers to Figures 1 to 2 Describe the optical lens 100 of Embodiment 1 of the present application.

[0108] Figure 1 The structural schematic diagram of the optical lens 100 of Embodiment 1 is shown. As Figure 1 shown, the optical lens 100 sequentially includes a first lens L1, a second lens L2, a third lens L3, a fourth lens L4, a fifth lens L5, a sixth lens L6, a seventh lens L7, and an imaging surface S17 along the optical axis from the object side to the image side.

[0109] The first lens L1 has a positive focal power, and its object side S1 and image side S2 are both aspherical surfaces. The object side S1 is convex at the optical axis and convex at the circumference, and the image side S2 is convex at the optical axis and convex at the circumference.

[0110] The second lens L2 has a negative focal power, and its object side S3 and image side S4 are both aspherical surfaces. The object side S3 is convex at the optical axis and convex at the circumference, and the image side S4 is concave at the optical axis and concave at the circumference.

[0111] The third lens L3 has a negative focal power, and its object side S5 and image side S6 are both aspherical surfaces. The object side S5 is convex at the optical axis and convex at the circumference, and the image side S6 is concave at the optical axis and concave at the circumference.

[0112] The fourth lens L4 has a negative focal power, and its object side S7 and image side S8 are both aspherical surfaces. The object side S7 is concave at the optical axis and concave at the circumference, and the image side S8 is convex at the optical axis and convex at the circumference.

[0113] The fifth lens L5 has a negative focal power, and its object side S9 and image side S10 are both aspherical surfaces. The object side S9 is convex at the optical axis and concave at the circumference, and the image side S10 is concave at the optical axis and convex at the circumference.

[0114] The sixth lens L6 has a negative focal power, and its object side S11 and image side S12 are both aspherical surfaces. The object side S11 is concave at the optical axis and concave at the circumference, and the image side S12 is concave at the optical axis and convex at the circumference.

[0115] The seventh lens L7 has a positive focal power, and its object side S13 and image side S14 are both aspherical surfaces. The object side S13 is convex at the optical axis and concave at the circumference, and the image side S14 is concave at the optical axis and convex at the circumference.

[0116] Setting the object sides and image sides of the first lens L1 to the seventh lens L7 as aspherical surfaces is beneficial for correcting aberrations and solving the problem of image plane distortion, and can also enable the lens to achieve excellent optical imaging effects in a smaller, thinner, and flatter state, thereby enabling the optical lens 100 to have miniaturization characteristics.

[0117] The materials of the first lens L1 to the seventh lens L7 are all plastics. Using lenses made of plastic materials can reduce the weight of the optical lens 100 and lower the production cost.

[0118] An aperture stop STO is also disposed between the third lens L3 and the fourth lens L4 to limit the size of the incident light beam and further improve the imaging quality of the optical lens 100. The optical lens 100 further includes a filter 110 disposed on the image side of the seventh lens L7 and having an object side surface S15 and an image side surface S16. Light from the object OBJ sequentially passes through the surfaces S1 to S16 and finally forms an image on the imaging surface S17. The filter 110 is used to filter out light in non-working bands, thereby preventing the phenomenon of false colors or ripples caused by the interference of light in non-working bands and avoiding imaging color distortion. Specifically, the filter 110 is an infrared filter and its material is glass.

[0119] Table 1 shows the surface type, radius of curvature, thickness, material, refractive index, Abbe number (i.e., dispersion coefficient) of the lenses of the optical lens 100 in Embodiment 1, and the effective focal length of each lens. The reference wavelength for the data in the table is 587.56 nm. Among them, the units of the radius of curvature, thickness, and effective focal length of the lens are all millimeters (mm). In addition, taking the first lens L1 as an example, the first value in the "thickness" parameter column of the first lens L1 is the thickness of the lens on the optical axis, and the second value is the distance on the optical axis from the image side surface of the lens to the object side surface of the subsequent lens in the image side direction; the value of the aperture stop ST0 in the "thickness" parameter column is the distance on the optical axis from the aperture stop ST0 to the vertex of the object side surface of the subsequent lens (the vertex refers to the intersection of the lens surface and the optical axis). We default the direction from the object side surface of the first lens L1 to the image side surface of the last lens as the positive direction of the optical axis. When this value is negative, it indicates that the aperture stop STO is disposed Figure 1 on the right side of the vertex of the object side surface of this lens. If the thickness of the aperture stop STO is positive, the aperture stop is on the left side of the vertex of the object side surface of this lens.

[0120] Table 1

[0121]

[0122] The aspherical surface type in the lens is defined by the following formula:

[0123]

[0124] where x is the sagitta, the distance from the vertex of the aspherical surface when the aspherical surface is at a position with a height of h along the optical axis direction; c is the paraxial curvature of the aspherical surface, c = 1 / R (i.e., the paraxial curvature c is the reciprocal of the radius of curvature R in Table 1); k is the conic coefficient; Ai is the i-th order coefficient of the aspherical surface. Table 2 below gives the higher-order coefficients A4, A6, A8, A10, A12, A14, A16, A18, and A20 that can be used for the aspherical surfaces S1 - S14 of the lenses in Embodiment 1.

[0125] Table 2

[0126]

[0127] Combining the data in Table 1 and Table 2, it can be seen that the optical lens 100 in Embodiment 1 satisfies:

[0128] TD / f = 0.84, where TD represents the distance on the optical axis from the object side S1 of the first lens L1 to the imaging surface S17 of the seventh lens L7, and f represents the effective focal length of the optical lens 100;

[0129] CT5 / T56 = 1.053, where CT5 represents the thickness of the fifth lens L5 on the optical axis, and T56 represents the distance on the optical axis from the image side S10 of the fifth lens L5 to the object side S11 of the sixth lens L6;

[0130] f123 / f4567 = -0.85, where f123 represents the combined focal length of the first lens L1 to the third lens L3, and f4567 represents the combined focal length of the fourth lens L4 to the eighth lens L8;

[0131] f1 / f = 0.51, where f1 represents the effective focal length of the first lens L1;

[0132] f2 / f1 = -2.65, where f1 represents the effective focal length of the first lens L1, and f2 represents the effective focal length of the second lens L2;

[0133] f7 / f = 2.04, where f7 represents the effective focal length of the seventh lens L7;

[0134] RS9 / RS10 = 1.04, where RS9 represents the radius of curvature of the object side S9 of the fifth lens L5 at the optical axis, and RS10 represents the radius of curvature of the image side S10 of the fifth lens L5 at the optical axis;

[0135] (RS11 - RS12) / (RS11 + RS12) = 3.25, where RS11 represents the radius of curvature of the object side S11 of the sixth lens L6 at the optical axis, and RS12 represents the radius of curvature of the image side S12 of the sixth lens L6 at the optical axis;

[0136] CT1 / (CT2 + CT3) = 2.54, where CT1 represents the thickness of the first lens L1 on the optical axis, CT2 represents the thickness of the second lens L2 on the optical axis, and CT3 represents the thickness of the third lens L3 on the optical axis;

[0137] f4 / RS7 = 2.55, where f4 represents the effective focal length of the fourth lens L4, and RS7 represents the radius of curvature of the object side S7 of the fourth lens L4 at the optical axis;

[0138] FNO = 2.17, where FNO represents the f-number of the optical lens 100.

[0139] Figure 2 The longitudinal spherical aberration curve, astigmatism curve, and distortion curve of the optical lens 100 of Embodiment 1 are respectively shown. The longitudinal spherical aberration curve shows the deviation of the convergence points of the light rays with wavelengths of 486.13 nm, 587.56 nm, and 656.27 nm after passing through the optical lens 100; the astigmatism curve shows the meridional image plane curvature and sagittal image plane curvature of the light rays with a wavelength of 587.56 nm after passing through the optical lens 100; the distortion curve shows the distortion at different image heights of the light rays with a wavelength of 587.56 nm after passing through the optical lens 100. According to Figure 2 it can be known that the optical lens 100 given in Embodiment 1 can achieve good imaging quality.

[0140] Embodiment 2

[0141] The following refers to Figures 3 to 4 to describe the optical lens 100 of Embodiment 2 of the present application. In this embodiment, for the sake of simplicity, some descriptions similar to those in Embodiment 1 will be omitted. Figure 3 The structural schematic diagram of the optical lens 100 of Embodiment 2 of the present application is shown.

[0142] As Figure 3 shown, the optical lens 100 sequentially includes a first lens L1, a second lens L2, a third lens L3, a fourth lens L4, a fifth lens L5, a sixth lens L6, a seventh lens L7, and an imaging surface S17 along the optical axis from the object side to the image side.

[0143] The first lens L1 has a positive optical power, and its object side surface S1 and image side surface S2 are both aspherical surfaces. The object side surface S1 is convex at the optical axis and convex at the circumference, and the image side surface S2 is convex at the optical axis and convex at the circumference.

[0144] The second lens L2 has a negative optical power, and its object side surface S3 and image side surface S4 are both aspherical surfaces. The object side surface S3 is convex at the optical axis and convex at the circumference, and the image side surface S4 is concave at the optical axis and concave at the circumference.

[0145] The third lens L3 has a positive optical power, and its object side surface S5 and image side surface S6 are both aspherical surfaces. The object side surface S5 is convex at the optical axis and convex at the circumference, and the image side surface S6 is concave at the optical axis and concave at the circumference.

[0146] The fourth lens L4 has a negative optical power, and its object side surface S7 and image side surface S8 are both aspherical surfaces. The object side surface S7 is concave at the optical axis and concave at the circumference, and the image side surface S8 is convex at the optical axis and convex at the circumference.

[0147] The fifth lens L5 has a positive optical power, and its object side S9 and image side S10 are both aspherical surfaces. Among them, the object side S9 is convex at the optical axis and concave at the circumference, and the image side S10 is concave at the optical axis and convex at the circumference.

[0148] The sixth lens L6 has a negative optical power, and its object side S11 and image side S12 are both aspherical surfaces. Among them, the object side S11 is concave at the optical axis and concave at the circumference, and the image side S12 is concave at the optical axis and convex at the circumference.

[0149] The seventh lens L7 has a positive optical power, and its object side S13 and image side S14 are both aspherical surfaces. Among them, the object side S13 is convex at the optical axis and concave at the circumference, and the image side S14 is concave at the optical axis and convex at the circumference.

[0150] The object sides and image sides of the first lens L1 to the seventh lens L7 are all set as aspherical surfaces. The materials of the first lens L1 to the seventh lens L7 are all plastics. A stop STO is also arranged between the third lens L3 and the fourth lens L4 to limit the size of the incident light beam and further improve the imaging quality of the optical lens 100. The optical lens 100 further includes a filter 110 disposed on the image side of the seventh lens L7 and having an object side S15 and an image side S16. The light from the object OBJ sequentially passes through the surfaces S1 to S16 and finally forms an image on the imaging surface S17. Specifically, the filter 110 is an infrared filter, and its material is glass.

[0151] Table 3 shows the surface types, curvature radii, thicknesses, materials, refractive indices, Abbe numbers (i.e., dispersion coefficients) of each lens of the optical lens 100 in Embodiment 2, and the effective focal lengths of each lens. The reference wavelength of the data in the table is 587.56 nm. Among them, the units of the curvature radius, thickness, and the effective focal length of each lens are all millimeters (mm); Table 4 shows the higher-order term coefficients of the aspherical surfaces S1 - S14 that can be used in the lenses in Embodiment 2, where the aspherical surface type can be defined by the formula (1) given in Embodiment 1; Table 5 shows the relevant parameter values of the optical lens 100 given in Embodiment 2.

[0152] Table 3

[0153]

[0154]

[0155] Table 4

[0156]

[0157] Table 5

[0158]

[0159] Figure 4 The longitudinal spherical aberration curve diagram, astigmatism curve diagram, and distortion curve diagram of the optical lens 100 of Embodiment 2 are respectively shown. Among them, the longitudinal spherical aberration curve diagram shows the deviation of the converging points of the light rays with wavelengths of 486.13 nm, 587.56 nm, and 656.27 nm after passing through the optical lens 100; the astigmatism curve diagram shows the meridional image plane curvature and sagittal image plane curvature of the light rays with a wavelength of 587.56 nm after passing through the optical lens 100; the distortion curve diagram shows the distortion at different image heights of the light rays with a wavelength of 587.56 nm after passing through the optical lens 100. According to Figure 4 it can be known that the optical lens 100 given in Embodiment 2 can achieve good imaging quality.

[0160] Embodiment 3

[0161] The following refers to Figures 5 to 6 to describe the optical lens 100 of Embodiment 3 of the present application. In this embodiment, for the sake of simplicity, some descriptions similar to those in Embodiment 1 will be omitted. Figure 5 The structural schematic diagram of the optical lens 100 of Embodiment 3 of the present application is shown.

[0162] As Figure 5 shown, the optical lens 100 sequentially includes a first lens L1, a second lens L2, a third lens L3, a fourth lens L4, a fifth lens L5, a sixth lens L6, a seventh lens L7, and an imaging surface S17 along the optical axis from the object side to the image side.

[0163] The first lens L1 has a positive optical power, and its object side surface S1 and image side surface S2 are both aspherical surfaces. Among them, the object side surface S1 is convex at the optical axis and convex at the circumference, and the image side surface S2 is concave at the optical axis and concave at the circumference.

[0164] The second lens L2 has a negative optical power, and its object side surface S3 and image side surface S4 are both aspherical surfaces. Among them, the object side surface S3 is convex at the optical axis and convex at the circumference, and the image side surface S4 is concave at the optical axis and concave at the circumference.

[0165] The third lens L3 has a positive optical power, and its object side surface S5 and image side surface S6 are both aspherical surfaces. Among them, the object side surface S5 is convex at the optical axis and convex at the circumference, and the image side surface S6 is concave at the optical axis and concave at the circumference.

[0166] The fourth lens L4 has a negative optical power, and its object side surface S7 and image side surface S8 are both aspherical surfaces. Among them, the object side surface S7 is concave at the optical axis and concave at the circumference, and the image side surface S8 is convex at the optical axis and convex at the circumference.

[0167] The fifth lens L5 has a positive focal power, and its object side S9 and image side S10 are both aspherical surfaces. Among them, the object side S9 is convex at the optical axis and concave at the circumference, and the image side S10 is concave at the optical axis and convex at the circumference.

[0168] The sixth lens L6 has a negative focal power, and its object side S11 and image side S12 are both aspherical surfaces. Among them, the object side S11 is concave at the optical axis and concave at the circumference, and the image side S12 is concave at the optical axis and convex at the circumference.

[0169] The seventh lens L7 has a positive focal power, and its object side S13 and image side S14 are both aspherical surfaces. Among them, the object side S13 is convex at the optical axis and concave at the circumference, and the image side S14 is convex at the optical axis and convex at the circumference.

[0170] The object sides and image sides of the first lens L1 to the seventh lens L7 are all set as aspherical surfaces. The materials of the first lens L1 to the seventh lens L7 are all plastics. A stop STO is also provided between the third lens L3 and the fourth lens L4 to limit the size of the incident light beam and further improve the imaging quality of the optical lens 100. The optical lens 100 further includes a filter 110 disposed on the image side of the seventh lens L7 and having an object side S15 and an image side S16. The light from the object OBJ sequentially passes through the surfaces S1 to S16 and finally forms an image on the imaging surface S17. Specifically, the filter 110 is an infrared filter, and its material is glass.

[0171] Table 6 shows the surface types, curvature radii, thicknesses, materials, refractive indices, Abbe numbers (i.e., dispersion coefficients) of the lenses of the optical lens 100 in Embodiment 3, and the effective focal lengths of the lenses. The reference wavelength of the data in the table is 587.56 nm. Among them, the units of the curvature radius, thickness, and the effective focal length of each lens are all millimeters (mm); Table 7 shows the high-order term coefficients of the aspherical surfaces S1 - S14 that can be used in the lenses in Embodiment 3, where the aspherical surface type can be defined by the formula (1) given in Embodiment 1; Table 8 shows the relevant parameter values of the optical lens 100 given in Embodiment 3.

[0172] Table 6

[0173]

[0174] Table 7

[0175]

[0176]

[0177] Table 8

[0178]

[0179] Figure 6 The longitudinal spherical aberration curve diagram, astigmatism curve diagram, and distortion curve diagram of the optical lens 100 of Embodiment 3 are respectively shown. Among them, the longitudinal spherical aberration curve diagram shows the deviation of the converging focal points of the light rays with wavelengths of 486.13 nm, 587.56 nm, and 656.27 nm after passing through the optical lens 100; the astigmatism curve diagram shows the meridional image plane curvature and sagittal image plane curvature of the light rays with a wavelength of 587.56 nm after passing through the optical lens 100; the distortion curve diagram shows the distortion at different image heights of the light rays with a wavelength of 587.56 nm after passing through the optical lens 100. According to Figure 6 it can be known that the optical lens 100 given in Embodiment 3 can achieve good imaging quality.

[0180] Embodiment 4

[0181] The following refers to Figures 7 to 8 to describe the optical lens 100 of Embodiment 4 of the present application. In this embodiment, for the sake of simplicity, some descriptions similar to those in Embodiment 1 will be omitted. Figure 7 The structural schematic diagram of the optical lens 100 of Embodiment 4 of the present application is shown.

[0182] As Figure 7 shown, the optical lens 100 sequentially includes a first lens L1, a second lens L2, a third lens L3, a fourth lens L4, a fifth lens L5, a sixth lens L6, a seventh lens L7, and an imaging surface S17 along the optical axis from the object side to the image side.

[0183] The first lens L1 has a positive optical power, and its object side surface S1 and image side surface S2 are both aspherical surfaces. Among them, the object side surface S1 is convex at the optical axis and convex at the circumference, and the image side surface S2 is concave at the optical axis and concave at the circumference.

[0184] The second lens L2 has a negative optical power, and its object side surface S3 and image side surface S4 are both aspherical surfaces. Among them, the object side surface S3 is convex at the optical axis and convex at the circumference, and the image side surface S4 is concave at the optical axis and concave at the circumference.

[0185] The third lens L3 has a positive optical power, and its object side surface S5 and image side surface S6 are both aspherical surfaces. Among them, the object side surface S5 is convex at the optical axis and convex at the circumference, and the image side surface S6 is concave at the optical axis and concave at the circumference.

[0186] The fourth lens L4 has a negative optical power, and its object side surface S7 and image side surface S8 are both aspherical surfaces. Among them, the object side surface S7 is concave at the optical axis and concave at the circumference, and the image side surface S8 is convex at the optical axis and convex at the circumference.

[0187] The fifth lens L5 has a positive focal power, and its object side S9 and image side S10 are both aspherical surfaces. Among them, the object side S9 is convex at the optical axis and concave at the circumference, and the image side S10 is concave at the optical axis and convex at the circumference.

[0188] The sixth lens L6 has a negative focal power, and its object side S11 and image side S12 are both aspherical surfaces. Among them, the object side S11 is concave at the optical axis and concave at the circumference, and the image side S12 is concave at the optical axis and convex at the circumference.

[0189] The seventh lens L7 has a positive focal power, and its object side S13 and image side S14 are both aspherical surfaces. Among them, the object side S13 is convex at the optical axis and concave at the circumference, and the image side S14 is concave at the optical axis and convex at the circumference.

[0190] The object sides and image sides of the first lens L1 to the seventh lens L7 are all set as aspherical surfaces. The materials of the first lens L1 to the seventh lens L7 are all plastics. A diaphragm STO is also provided between the third lens L3 and the fourth lens L4 to limit the size of the incident light beam and further improve the imaging quality of the optical lens 100. The optical lens 100 further includes a filter 110 provided on the image side of the seventh lens L7 and having an object side S15 and an image side S16. The light from the object OBJ sequentially passes through the surfaces S1 to S16 and finally forms an image on the imaging surface S17. Specifically, the filter 110 is an infrared filter, and its material is glass.

[0191] Table 9 shows the surface types, curvature radii, thicknesses, materials, refractive indices, Abbe numbers (i.e., dispersion coefficients) of the lenses of the optical lens 100 in Embodiment 4, and the effective focal lengths of the lenses. The reference wavelength of the data in the table is 587.56 nm. Among them, the units of the curvature radius, thickness, and the effective focal lengths of the lenses are all millimeters (mm); Table 10 shows the higher-order term coefficients of the aspherical surfaces S1 - S14 of the lenses that can be used in Embodiment 4, where the aspherical surface profile can be defined by the formula (1) given in Embodiment 1; Table 11 shows the relevant parameter values of the optical lens 100 given in Embodiment 4.

[0192] Table 9

[0193]

[0194]

[0195] Table 10

[0196]

[0197] Table 11

[0198]

[0199] Figure 8 Respectively shown are the longitudinal spherical aberration curve graph, astigmatism curve graph, and distortion curve graph of the optical lens 100 of Embodiment 4. Among them, the longitudinal spherical aberration curve graph shows the deviation of the converging focal points of the light rays with wavelengths of 486.13 nm, 587.56 nm, and 656.27 nm after passing through the optical lens 100; the astigmatism curve graph shows the meridional image plane curvature and sagittal image plane curvature of the light rays with a wavelength of 587.56 nm after passing through the optical lens 100; the distortion curve graph shows the distortion at different image heights of the light rays with a wavelength of 587.56 nm after passing through the optical lens 100. According to Figure 8 it can be known that the optical lens 100 given in Embodiment 4 can achieve good imaging quality.

[0200] Embodiment 5

[0201] The following refers to Figures 9 to 10 to describe the optical lens 100 of Embodiment 5 of the present application. In this embodiment, for the sake of simplicity, some descriptions similar to those in Embodiment 1 will be omitted. Figure 9 Shown is a schematic structural diagram of the optical lens 100 of Embodiment 5 of the present application.

[0202] As Figure 9 shown, the optical lens 100 sequentially includes a first lens L1, a second lens L2, a third lens L3, a fourth lens L4, a fifth lens L5, a sixth lens L6, a seventh lens L7, and an imaging surface S17 along the optical axis from the object side to the image side.

[0203] The first lens L1 has a positive optical power, and both its object side surface S1 and image side surface S2 are aspherical surfaces. Among them, the object side surface S1 is convex at the optical axis and convex at the circumference, and the image side surface S2 is concave at the optical axis and concave at the circumference.

[0204] The second lens L2 has a negative optical power, and both its object side surface S3 and image side surface S4 are aspherical surfaces. Among them, the object side surface S3 is convex at the optical axis and convex at the circumference, and the image side surface S4 is concave at the optical axis and concave at the circumference.

[0205] The third lens L3 has a positive optical power, and both its object side surface S5 and image side surface S6 are aspherical surfaces. Among them, the object side surface S5 is convex at the optical axis and convex at the circumference, and the image side surface S6 is concave at the optical axis and concave at the circumference.

[0206] The fourth lens L4 has a negative optical power, and both its object side surface S7 and image side surface S8 are aspherical surfaces. Among them, the object side surface S7 is concave at the optical axis and concave at the circumference, and the image side surface S8 is concave at the optical axis and convex at the circumference.

[0207] The fifth lens L5 has a positive optical power, and its object side S9 and image side S10 are both aspherical surfaces. Among them, the object side S9 is convex at the optical axis and concave at the circumference, and the image side S10 is concave at the optical axis and convex at the circumference.

[0208] The sixth lens L6 has a negative optical power, and its object side S11 and image side S12 are both aspherical surfaces. Among them, the object side S11 is concave at the optical axis and concave at the circumference, and the image side S12 is concave at the optical axis and convex at the circumference.

[0209] The seventh lens L7 has a positive optical power, and its object side S13 and image side S14 are both aspherical surfaces. Among them, the object side S13 is convex at the optical axis and concave at the circumference, and the image side S14 is concave at the optical axis and convex at the circumference.

[0210] The object sides and image sides of the first lens L1 to the seventh lens L7 are all set as aspherical surfaces. The materials of the first lens L1 to the seventh lens L7 are all plastics. A stop STO is also arranged between the third lens L3 and the fourth lens L4 to limit the size of the incident light beam and further improve the imaging quality of the optical lens 100. The optical lens 100 further includes a filter 110 disposed on the image side of the seventh lens L7 and having an object side S15 and an image side S16. The light from the object OBJ sequentially passes through the surfaces S1 to S16 and finally forms an image on the imaging surface S17. Specifically, the filter 110 is an infrared filter, and its material is glass.

[0211] Table 12 shows the surface types, curvature radii, thicknesses, materials, refractive indices, Abbe numbers (i.e., dispersion coefficients) of the lenses of the optical lens 100 in Embodiment 5, and the effective focal lengths of the lenses. The reference wavelength of the data in the table is 587.56 nm. Among them, the units of the curvature radius, thickness, and the effective focal lengths of the lenses are all millimeters (mm); Table 13 shows the high-order term coefficients of the aspherical surfaces S1 - S14 that can be used in the lenses in Embodiment 5, where the aspherical surface type can be defined by the formula (1) given in Embodiment 1; Table 14 shows the relevant parameter values of the optical lens 100 given in Embodiment 5.

[0212] Table 12

[0213]

[0214] Table 13

[0215]

[0216]

[0217] Table 14

[0218]

[0219] Figure 10 The longitudinal spherical aberration curve diagram, astigmatism curve diagram, and distortion curve diagram of the optical lens 100 of Embodiment 5 are respectively shown. The longitudinal spherical aberration curve diagram shows the deviation of the convergence points of the light rays with wavelengths of 486.13 nm, 587.56 nm, and 656.27 nm after passing through the optical lens 100; the astigmatism curve diagram shows the meridional image plane curvature and sagittal image plane curvature of the light rays with a wavelength of 587.56 nm after passing through the optical lens 100; the distortion curve diagram shows the distortion at different image heights of the light rays with a wavelength of 587.56 nm after passing through the optical lens 100. According to Figure 10 it can be known that the optical lens 100 given in Embodiment 5 can achieve good imaging quality.

[0220] Embodiment 6

[0221] The following refers to Figures 11 to 12 to describe the optical lens 100 of Embodiment 6 of the present application. In this embodiment, for the sake of simplicity, some descriptions similar to those in Embodiment 1 will be omitted. Figure 11 The structural schematic diagram of the optical lens 100 of Embodiment 6 of the present application is shown.

[0222] As Figure 11 shown, the optical lens 100 sequentially includes a first lens L1, a second lens L2, a third lens L3, a fourth lens L4, a fifth lens L5, a sixth lens L6, a seventh lens L7, and an imaging surface S17 along the optical axis from the object side to the image side.

[0223] The first lens L1 has a positive optical power, and both its object side surface S1 and image side surface S2 are aspherical surfaces. Among them, the object side surface S1 is convex at the optical axis and convex at the circumference, and the image side surface S2 is convex at the optical axis and convex at the circumference.

[0224] The second lens L2 has a negative optical power, and both its object side surface S3 and image side surface S4 are aspherical surfaces. Among them, the object side surface S3 is convex at the optical axis and convex at the circumference, and the image side surface S4 is concave at the optical axis and concave at the circumference.

[0225] The third lens L3 has a positive optical power, and both its object side surface S5 and image side surface S6 are aspherical surfaces. Among them, the object side surface S5 is convex at the optical axis and convex at the circumference, and the image side surface S6 is concave at the optical axis and concave at the circumference.

[0226] The fourth lens L4 has a negative optical power, and both its object side surface S7 and image side surface S8 are aspherical surfaces. Among them, the object side surface S7 is concave at the optical axis and concave at the circumference, and the image side surface S8 is convex at the optical axis and convex at the circumference.

[0227] The fifth lens L5 has a negative optical power, and its object side S9 and image side S10 are both aspherical surfaces. Among them, the object side S9 is convex at the optical axis and concave at the circumference, and the image side S10 is concave at the optical axis and convex at the circumference.

[0228] The sixth lens L6 has a negative optical power, and its object side S11 and image side S12 are both aspherical surfaces. Among them, the object side S11 is concave at the optical axis and concave at the circumference, and the image side S12 is concave at the optical axis and convex at the circumference.

[0229] The seventh lens L7 has a positive optical power, and its object side S13 and image side S14 are both aspherical surfaces. Among them, the object side S13 is convex at the optical axis and concave at the circumference, and the image side S14 is concave at the optical axis and convex at the circumference.

[0230] The object sides and image sides of the first lens L1 to the seventh lens L7 are all set as aspherical surfaces. The materials of the first lens L1 to the seventh lens L7 are all plastics. A diaphragm STO is also arranged between the third lens L3 and the fourth lens L4 to limit the size of the incident light beam and further improve the imaging quality of the optical lens 100. The optical lens 100 further includes a filter 110 disposed on the image side of the seventh lens L7 and having an object side S15 and an image side S16. The light from the object OBJ sequentially passes through the surfaces S1 to S16 and finally forms an image on the imaging surface S17. Specifically, the filter 110 is an infrared filter, and its material is glass.

[0231] Table 15 shows the surface types, curvature radii, thicknesses, materials, refractive indices, Abbe numbers (i.e., dispersion coefficients) of the lenses of the optical lens 100 in Embodiment 6, and the effective focal lengths of the lenses. The reference wavelength of the data in the table is 587.56 nm. Among them, the units of the curvature radius, thickness, and the effective focal length of each lens are all millimeters (mm); Table 16 shows the high-order term coefficients of the aspherical surfaces S1 - S14 of the lenses that can be used in Embodiment 6, where the aspherical surface type can be defined by the formula (1) given in Embodiment 1; Table 17 shows the relevant parameter values of the optical lens 100 given in Embodiment 6.

[0232] Table 15

[0233]

[0234] Table 16

[0235]

[0236] Table 17

[0237]

[0238]

[0239] Figure 12 Respectively shown are the longitudinal spherical aberration curve graph, astigmatism curve graph, and distortion curve graph of the optical lens 100 of Embodiment 6. Among them, the longitudinal spherical aberration curve graph shows the deviation of the convergence points of light rays with wavelengths of 486.13 nm, 587.56 nm, and 656.27 nm after passing through the optical lens 100; the astigmatism curve graph shows the meridional image plane curvature and sagittal image plane curvature of light rays with a wavelength of 587.56 nm after passing through the optical lens 100; the distortion curve graph shows the distortion at different image heights of light rays with a wavelength of 587.56 nm after passing through the optical lens 100. According to Figure 12 it can be known that the optical lens 100 given in Embodiment 6 can achieve good imaging quality.

[0240] Embodiment 7

[0241] The following refers to Figures 13 to 14 to describe the optical lens 100 of Embodiment 7 of the present application. In this embodiment, for the sake of simplicity, some descriptions similar to those in Embodiment 1 will be omitted. Figure 13 Shown is a schematic structural diagram of the optical lens 100 of Embodiment 7 of the present application.

[0242] As Figure 13 shown, the optical lens 100 sequentially includes a first lens L1, a second lens L2, a third lens L3, a fourth lens L4, a fifth lens L5, a sixth lens L6, a seventh lens L7, and an imaging surface S17 along the optical axis from the object side to the image side.

[0243] The first lens L1 has a positive optical power, and its object side surface S1 and image side surface S2 are both aspherical surfaces. Among them, the object side surface S1 is convex at the optical axis and convex at the circumference, and the image side surface S2 is convex at the optical axis and concave at the circumference.

[0244] The second lens L2 has a negative optical power, and its object side surface S3 and image side surface S4 are both aspherical surfaces. Among them, the object side surface S3 is convex at the optical axis and convex at the circumference, and the image side surface S4 is concave at the optical axis and concave at the circumference.

[0245] The third lens L3 has a positive optical power, and its object side surface S5 and image side surface S6 are both aspherical surfaces. Among them, the object side surface S5 is convex at the optical axis and convex at the circumference, and the image side surface S6 is concave at the optical axis and concave at the circumference.

[0246] The fourth lens L4 has a negative optical power, and its object side surface S7 and image side surface S8 are both aspherical surfaces. Among them, the object side surface S7 is concave at the optical axis and concave at the circumference, and the image side surface S8 is convex at the optical axis and convex at the circumference.

[0247] The fifth lens L5 has a positive optical power, and its object side S9 and image side S10 are both aspherical surfaces. Among them, the object side S9 is convex at the optical axis and concave at the circumference, and the image side S10 is concave at the optical axis and convex at the circumference.

[0248] The sixth lens L6 has a negative optical power, and its object side S11 and image side S12 are both aspherical surfaces. Among them, the object side S11 is concave at the optical axis and concave at the circumference, and the image side S12 is concave at the optical axis and convex at the circumference.

[0249] The seventh lens L7 has a positive optical power, and its object side S13 and image side S14 are both aspherical surfaces. Among them, the object side S13 is convex at the optical axis and concave at the circumference, and the image side S14 is concave at the optical axis and convex at the circumference.

[0250] The object sides and image sides of the first lens L1 to the seventh lens L7 are all set as aspherical surfaces. The materials of the first lens L1 to the seventh lens L7 are all plastics. A diaphragm STO is also arranged between the third lens L3 and the fourth lens L4 to limit the size of the incident light beam and further improve the imaging quality of the optical lens 100. The optical lens 100 further includes a filter 110 disposed on the image side of the seventh lens L7 and having an object side S15 and an image side S16. The light from the object OBJ sequentially passes through the surfaces S1 to S16 and finally forms an image on the imaging surface S17. Specifically, the filter 110 is an infrared filter, and its material is glass.

[0251] Table 18 shows the surface types, curvature radii, thicknesses, materials, refractive indices, Abbe numbers (i.e., dispersion coefficients) of the lenses of the optical lens 100 in Example 7, and the effective focal lengths of the lenses. The reference wavelength of the data in the table is 587.56 nm. Among them, the units of the curvature radius, thickness, and the effective focal length of each lens are all millimeters (mm); Table 19 shows the higher-order term coefficients of the aspherical surfaces S1 - S14 of the lenses that can be used in Example 7, and the aspherical surface type can be defined by the formula (1) given in Example 1; Table 20 shows the relevant parameter values of the optical lens 100 given in Example 7.

[0252] Table 18

[0253]

[0254]

[0255] Table 19

[0256]

[0257] Table 20

[0258]

[0259] Figure 14 respectively show the longitudinal spherical aberration curve diagram, astigmatism curve diagram and distortion curve diagram of the optical lens 100 of Embodiment 7. The longitudinal spherical aberration curve diagram shows the deviation of the converging points of the light rays with wavelengths of 486.13 nm, 587.56 nm, and 656.27 nm after passing through the optical lens 100; the astigmatism curve diagram shows the meridional image plane bending and sagittal image plane bending of the light rays with a wavelength of 587.56 nm after passing through the optical lens 100; the distortion curve diagram shows the distortion at different image heights of the light rays with a wavelength of 587.56 nm after passing through the optical lens 100. According to Figure 14 it can be known that the optical lens 100 given in Embodiment 7 can achieve good imaging quality.

[0260] As Figure 15 shown, the present application also provides an image pickup module 200, including the optical lens 100 as described above (as Figure 1 shown); and an image sensor 210, the image sensor 210 is disposed on the image side of the optical lens 100, and the photosensitive surface of the image sensor 210 coincides with the imaging plane S17. Specifically, the image sensor 210 can adopt a complementary metal oxide semiconductor (CMOS) image sensor or a charge-coupled device (CCD) image sensor. Depending on the corresponding image sensor 210, the imaging plane S17 can be a plane or a curved surface with any curvature, especially a curved surface with a concave surface facing the object side direction.

[0261] In some other embodiments, the image pickup module 200 further includes a lens barrel (not shown in the figure) for carrying the optical lens 100 and a corresponding support device (not shown in the figure).

[0262] In addition, the imaging module 200 further includes a driving device (not shown in the figure) and an image stabilization module (not shown in the figure). The driving device may have an auto-focus function, and its driving method may use driving systems such as a voice coil motor (VCM), a micro electro-mechanical system (MEMS), a piezoelectric system, and a shape memory alloy. The driving device can enable the optical lens 100 to obtain a better imaging position, so that clear images can be captured for objects at different object distances; the image stabilization module can be an accelerometer, a gyroscope, or a Hall effect sensor. The driving device and the image stabilization module together serve as an optical image stabilization (OIS) device, which compensates for blurred images generated due to shaking during shooting by adjusting the displacement of the optical lens 100 along the optical axis, or provides an electronic image stabilization (EIS) function by using image compensation technology in the image software, further improving the imaging quality for shooting in dynamic and low-light scenarios.

[0263] The above-mentioned imaging module 200 can achieve long-distance shooting by using the aforementioned optical lens 100, and the captured images have high pixels and good quality. At the same time, the imaging module 200 also has the structural characteristics of being miniaturized and lightweight. The imaging module 200 can be applied to fields such as mobile phones, automobiles, monitoring, and medical treatment. Specifically, it can be used as a mobile phone camera, a vehicle-mounted camera, or a monitoring camera, etc., and has a wide range of market applications.

[0264] As Figure 16 shown, the present application further provides an electronic device 300, which includes a housing 310 and the aforementioned imaging module 200, and the imaging module 200 is installed on the housing 310. Specifically, the imaging module 200 is disposed inside the housing 310 and exposed from the housing 310 to acquire images. The housing 310 can provide protection such as dust-proof, waterproof, and anti-drop for the imaging module 200. A hole corresponding to the imaging module 200 is provided on the housing 310 to allow light to penetrate into or out of the housing through the hole.

[0265] The above-mentioned electronic device 300 has the characteristic of being lightweight, and can achieve high-definition telephoto shooting by using the aforementioned imaging module 200, which is beneficial to improving the shooting experience of users. In some other embodiments, the above-mentioned electronic device 300 is further provided with a corresponding processing system. After shooting an object image, the electronic device 300 can timely transmit the image to the corresponding processing system for the system to make accurate analysis and judgment.

[0266] In some other embodiments, the "electronic device" used may further include, but is not limited to, a device configured to receive or transmit communication signals via a wired connection and / or via a wireless interface. An electronic device configured to communicate via a wireless interface may be referred to as a "wireless communication terminal", "wireless terminal" or "mobile terminal". Examples of mobile terminals include, but are not limited to, satellite or cellular phones; personal communication system (PCS) terminals that can combine cellular radiotelephone with data processing, facsimile, and data communication capabilities; personal digital assistants (PDAs) that may include radiotelephones, pagers, Internet / intranet access, web browsers, notebooks, calendars, and / or global positioning system (GPS) receivers; and conventional laptop and / or palmtop receivers or other electronic devices including radiotelephone transceivers. In addition, the "electronic device" may further include three-dimensional image capturing devices, digital cameras, tablet computers, smart TVs, network monitoring devices, dash cams, reverse imaging devices, multi-lens devices, identification systems, motion-sensing game consoles, and wearable devices, etc. The above-mentioned electronic devices are only exemplary illustrations of the actual application examples of the present invention, and do not limit the application scope of the imaging module of the present application.

[0267] The technical features of the above-described embodiments can be combined arbitrarily. For the sake of brevity of description, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, it should be considered as the scope described in this specification.

[0268] The above-described embodiments merely represent several implementation manners of the present invention, and the description thereof is relatively specific and detailed, but it should not be construed as a limitation on the scope of the invention patent. It should be noted that for those of ordinary skill in the art, without departing from the concept of the present invention, several modifications and improvements can still be made, and these all belong to the protection scope of the present invention. Therefore, the protection scope of the invention patent shall be subject to the appended claims.

Claims

1. An optical lens, characterized in that, There are a total of seven lenses with refractive power. The optical lens sequentially includes, from the object side to the image side along the optical axis, a first lens with positive refractive power, and the object side surface of the first lens is convex near the optical axis; a second lens with negative refractive power; a third lens with refractive power, and the image side surface of the third lens is concave near the optical axis; a fourth lens with negative refractive power, and the object side surface of the fourth lens is concave near the optical axis; a fifth lens with refractive power; a sixth lens with negative refractive power; a seventh lens with positive refractive power, the object side surface of the seventh lens is convex near the optical axis, and both its object side surface and image side surface are aspherical surfaces, and at least one surface of the object side surface and image side surface of the seventh lens contains at least one inflection point; The optical lens satisfies the following relational expressions: 0.5 < CT5 / T56 < 2; -5 < f2 / f1 ≤ -2.37; FNO ≤ 2.2; wherein, CT5 represents the thickness of the fifth lens on the optical axis, T56 represents the distance on the optical axis from the image side surface of the fifth lens to the object side surface of the sixth lens, f1 represents the effective focal length of the first lens, f2 represents the effective focal length of the second lens, and FNO represents the aperture number of the optical lens.

2. The optical lens according to claim 1, wherein The optical lens satisfies the following relational expressions: -1 < f123 / f4567 < -0.5; wherein, f123 represents the combined focal length of the first lens to the third lens, and f4567 represents the combined focal length of the fourth lens to the seventh lens.

3. The optical lens according to claim 1, wherein The optical lens satisfies the following relational expressions: 0.6 < TD / f < 1; wherein, TD represents the distance on the optical axis from the object side surface of the first lens to the imaging surface of the seventh lens, and f represents the effective focal length of the optical lens.

4. The optical lens according to claim 1, wherein The optical lens satisfies the following relational expressions: 0.3 < f1 / f < 0.8; wherein, f1 represents the effective focal length of the first lens.

5. The optical lens according to claim 1, characterized in that, The optical lens satisfies the following relational expressions: 1 < f7 / f < 10; wherein, f7 represents the effective focal length of the seventh lens.

6. The optical lens according to claim 1, characterized in that, The optical lens satisfies the following relational expressions: 0.5 < RS9 / RS10 < 2; wherein, RS9 represents the radius of curvature of the object side surface of the fifth lens on the optical axis, and RS10 represents the radius of curvature of the image side surface of the fifth lens on the optical axis.

7. The optical lens according to claim 1, wherein The optical lens satisfies the following relational expressions: -5 < (RS11 - RS12) / (RS11 + RS12) < 8; wherein, RS11 represents the radius of curvature of the object side surface of the sixth lens on the optical axis, and RS12 represents the radius of curvature of the image side surface of the sixth lens on the optical axis.

8. The optical lens according to claim 1, characterized in that The optical lens satisfies the following relational expressions: 1.93 ≤ CT1 / (CT2 + CT3) < 3; wherein, CT1 represents the thickness of the first lens on the optical axis, CT2 represents the thickness of the second lens on the optical axis, and CT3 represents the thickness of the third lens on the optical axis.

9. The optical lens according to claim 1, characterized in that, The optical lens satisfies the following relational expressions: 0 < f4 / RS7 < 8; wherein, f4 represents the effective focal length of the fourth lens, and RS7 represents the radius of curvature of the object side surface of the fourth lens on the optical axis.

10. The optical lens according to claim 1, characterized in that, The optical lens satisfies the following relational expressions: 1.95 ≤ FNO ≤ 2.

2.

11. An imaging module, characterized in that, It includes an optical lens as described in any one of claims 1-10 and an image sensor, and the image sensor is disposed on the image side of the optical lens.

12. An electronic device, characterized in that, It includes a housing and an imaging module as described in claim 11, and the imaging module is mounted on the housing.

Images