Optical lens, camera module and terminal device

Abstract

The application discloses an optical lens, a camera module and a terminal device. The optical lens comprises seven lenses with refractive power. The first lens has negative refractive power, the object side is a convex surface, and the image side is a concave surface. The second lens has negative refractive power, the object side is a concave surface, and the image side is a convex surface. The third lens has positive refractive power, and the object side and the image side are both convex surfaces. The fourth lens has positive refractive power, and the object side and the image side are both convex surfaces. The fifth lens has refractive power. The sixth lens has refractive power, and the seventh lens has positive refractive power, and the object side is a convex surface. The optical lens satisfies the following relationship: 140deg <= FOV <= 151deg, 6.4 < TTL / IMGH < 7, and 1 < SAGs1 / CT1 < 1.25. The optical lens, the camera module and the terminal device can meet the miniaturized design of the optical lens and high-pixel imaging.

Description

Technical Field

[0001] This application relates to the field of optical imaging technology, and in particular to an optical lens, camera module and terminal device. Background Technology

[0002] With the development of the automotive industry, national requirements for road traffic safety and vehicle safety are constantly increasing. The application of ADAS (Advanced Driving Assistance System), DMS (Driver Monitoring System), and CMS (Camera Monitor System) in vehicle driving is gradually being promoted. In the context of the rise of intelligent cockpits, the requirements for automotive cameras are also increasing. However, current automotive cameras, in the trend towards miniaturization, have low resolution, small depth of field, and cannot simultaneously meet the requirements of presenting distant details and clear imaging over a wide angle. Summary of the Invention

[0003] This application provides an optical lens, a camera module, and a terminal device that can achieve high-pixel imaging while meeting the requirements of miniaturized optical lens design.

[0004] To achieve the above objectives, in a first aspect, embodiments of this application disclose an optical lens comprising seven lenses with refractive power, including a first lens, a second lens, a third lens, a fourth lens, a fifth lens, a sixth lens, and a seventh lens arranged sequentially along the optical axis from the object side to the image side;

[0005] The first lens has negative refractive power, the object side of the first lens is convex near the optical axis, and the image side of the first lens is concave near the optical axis.

[0006] The second lens has negative refractive power, the object side of the second lens is concave near the optical axis, and the image side of the second lens is convex near the optical axis;

[0007] The third lens has positive refractive power, and both the object-side and image-side surfaces of the third lens are convex near the optical axis.

[0008] The fourth lens has positive refractive power, and both the object-side and image-side surfaces of the fourth lens are convex near the optical axis.

[0009] The fifth lens has refractive power;

[0010] The sixth lens has refractive power;

[0011] The seventh lens has positive refractive power, and the object side of the seventh lens is convex near the optical axis;

[0012] The optical lens satisfies the following relational expressions:

[0013] 140deg ≤ FOV ≤ 151deg, 6.4 < TTL / IMGH < 7, and 1 < SAGs1 / CT1 < 1.25;

[0014] Where, FOV is the maximum field angle of the optical lens, TTL is the distance from the object side of the first lens to the imaging surface of the optical lens on the optical axis, IMGH is half of the image height corresponding to the maximum field angle of the optical lens, SAGs1 is the distance in the optical axis direction from the maximum effective semi-aperture of the object side of the first lens to the intersection of the object side of the first lens and the optical axis, and CT1 is the thickness of the first lens on the optical axis.

[0015] In the optical lens provided by this application, in order to meet the requirements of miniaturized design of the optical lens while taking into account high imaging quality, by reasonably configuring the refractive power and surface shape of seven lenses, that is, setting the first lens to have a negative refractive power, and配合 its object side and image side being convex and concave respectively near the optical axis, which is beneficial to collecting more light into the optical lens and realizing the wide-angleization of the optical lens; the second lens has a negative refractive power, and配合 its object side and image side being concave and convex respectively near the optical axis, which is beneficial to the light entering the optical lens gently, so as to be able to correct the distortion of the optical lens and reduce the aberration generated by the optical lens, and improve the imaging quality; the third lens has a positive refractive power, and配合 its object side and image side being convex near the optical axis, which is beneficial to correcting the field curvature of the optical lens; the fourth lens has a positive refractive power, and配合 the object side and image side of the fourth lens being convex near the optical axis, which is beneficial to correcting the aberration of the optical lens; the fifth lens has a refractive power, the sixth lens has a refractive power, which is beneficial to correcting the aberration of the optical lens and improving the imaging quality, and at the same time can reasonably distribute the refractive power of the fifth lens and the sixth lens. The seventh lens has a positive refractive power, and配合 the object side of the seventh lens being convex near the optical axis, which can correct the off-axis spherical aberration and chromatic dispersion of the optical lens, thus being beneficial to improving the imaging quality of the optical lens.

[0016] At the same time, among the seven lenses of the optical lens, multiple lenses adopt the design of convex-concave lenses, which can further reduce the overall length of the optical lens, so as to realize the miniaturized design of the optical lens.

[0017] In addition, by limiting that the optical lens satisfies the relational expression 140deg ≤ FOV ≤ 151deg, the optical lens has a large field angle and can achieve wide-angle imaging.

[0018] Moreover, the optical lens satisfies 6.4 < TTL / IMGH < 7, which can achieve miniaturization design of the optical lens while realizing large image plane imaging, thus facilitating the improvement of imaging clarity of the optical lens, and further facilitating the improvement of imaging quality of the optical lens.

[0019] In addition, the optical lens satisfies 1 < SAGs1 / CT1 < 1.25, which can reasonably control the surface shape of the first lens and the thickness of the first lens, thereby controlling the overall thickness of the first lens on the optical axis and making the first lens thinner and lighter.

[0020] As an optional implementation manner, in the embodiment of the first aspect of the present application, 7.5 < TTL / F < 8, and / or, 1.6 < TTL / ΣCT < 2, and / or, 5 < TTL / CTMAX < 7;

[0021] where F is the focal length of the optical lens, ΣCT is the sum of the thicknesses of all lenses from the first lens to the seventh lens on the optical axis, and CTMAX is the maximum thickness of the lenses from the first lens to the seventh lens on the optical axis.

[0022] When the optical lens satisfies the relation 7.5 < TTL / F < 8, it can achieve miniaturization of the optical lens while enabling the optical lens to have a wide-angle characteristic.

[0023] When the optical lens satisfies the relation 1.6 < TTL / ΣCT < 2, the sum of the thicknesses of all lenses of the optical lens is reasonable, so that the overall arrangement of the optical lens is relatively compact, which is beneficial to the miniaturization design of the optical lens.

[0024] When the optical lens satisfies the relation 5 < TTL / CTMAX < 7, it can reasonably configure the proportion of the maximum central thickness in the total length of the optical lens, so that the overall structure of the optical lens is compact, which is beneficial to the miniaturization design of the optical lens.

[0025] As an optional implementation manner, in the embodiment of the first aspect of the present application, the fifth lens and the sixth lens form a cemented lens, and the optical lens satisfies the following relations: -5 < F56 / F < -2, and / or, 2.5 < F3 / F < 3.5, and / or, |F567 / F| > 5;

[0026] where F56 is the combined focal length of the fifth lens and the sixth lens, F^3 is the focal length of the third lens, F567 is the combined focal length of the fifth lens, the sixth lens and the seventh lens, and F is the focal length of the optical lens.

[0027] Since the fifth lens and the sixth lens are cemented lenses, when the optical lens satisfies -5 < F56 / F < -2, the ratio of the combined focal length of the fifth lens and the sixth lens to the focal length of the optical lens can be reasonably configured, so that the refractive powers of the fifth lens and the sixth lens can be reasonably distributed, thereby providing the optical lens with better light converging ability, while being able to correct the distortion of the optical lens and reduce the aberration generated by the optical lens, improving the imaging quality of the optical lens.

[0028] When the optical lens satisfies 2.5 < F3 / F < 3.5, since the third lens provides a positive refractive power for the optical lens and provides the main light converging ability of the lens group of the optical lens, therefore, by controlling the ratio relationship between the focal length of the third lens and the focal length of the optical lens, it is beneficial to reasonably distribute the positive optical power of the optical lens and shorten the overall optical length of the optical lens. When exceeding the upper limit of the relational expression, the focal length of the third lens becomes larger, the light is deflected greatly, and it is easy to increase the aberration of the off-axis field. When lower than the lower limit of the relational expression, the focal length of the optical lens is too large, and the overall length of the optical lens is too long, which is not conducive to the miniaturization design of the optical lens.

[0029] When the optical lens satisfies |F567 / F| > 5, the combined focal length of the rear lens group of the optical lens (that is, the combined focal length of the fifth lens, the sixth lens and the seventh lens) can be reasonably controlled, so as to reasonably distribute the refractive powers of the fifth lens, the sixth lens and the seventh lens, and further provide the optical lens with better light converging ability, while being able to correct the distortion of the optical lens and reduce the aberration generated by the optical lens, improving the imaging quality of the optical lens.

[0030] As an optional implementation manner, in the embodiment of the first aspect of the present application, the optical lens satisfies the following relational expressions: -10 < F1 / CT1 < -5, and / or, 2 < F4 / CT4 < 6, and / or, 0.9 < BFL / F < 1.2, and / or, 1 < (CT5 + CT6 + CT7) / F < 1.5;

[0031] Wherein, F1 is the focal length of the first lens, F4 is the focal length of the fourth lens, F is the focal length of the optical lens, BFL is the distance from the image side of the seventh lens to the imaging surface of the optical lens on the optical axis, CT4 is the thickness of the fourth lens on the optical axis, CT5 is the thickness of the fifth lens on the optical axis, CT6 is the thickness of the sixth lens on the optical axis, and CT7 is the thickness of the seventh lens on the optical axis.

[0032] When the optical lens satisfies -10 < F1 / CT1 < -5, the refractive power and thickness of the first lens can be reasonably configured, so as to effectively control the incident angle of light in the optical lens, reduce the sensitivity of the optical lens, be beneficial to correcting the aberration generated by the optical lens, and further be beneficial to improving the imaging quality of the optical lens.

[0033] When the optical lens satisfies 2 < F4 / CT4 < 6, the ratio of the focal length of the fourth lens to the central thickness of the fourth lens can be reasonably controlled, so that the light passing through the fourth lens can be made smoother, which is beneficial to reducing the sensitivity of the optical lens, correcting the aberration generated by the optical lens, and further improving the imaging quality of the optical lens.

[0034] When the optical lens satisfies 0.9 < BFL / F < 1.2, the back focal length of the optical lens can be effectively controlled within a reasonable range, enabling the optical lens to achieve a miniaturized design.

[0035] When the optical lens satisfies 1 < (CT5 + CT6 + CT7) / F < 1.5, the ratio of the combined thickness of the rear lens group (i.e., the sum of the central thicknesses of the fifth, sixth, and seventh lenses) to the focal length of the optical lens can be reasonably controlled, so that the light can be more converged, which is beneficial to reducing the sensitivity of the optical lens, correcting the aberration generated by the optical lens, and further improving the imaging quality of the optical lens.

[0036] As an optional implementation manner, in the embodiments of the first aspect of the present application, the optical lens satisfies the following relational expressions:

[0037] 5.5 < SD1 / SAGs1 < 7, and / or, 1.0 < SD3 / SD14 < 1.2, and / or, 0.8 < SD9 / SD7 < 1.1;

[0038] Wherein, SD1 is the maximum effective semi-aperture of the object side of the first lens, SD3 is the maximum effective semi-aperture of the object side of the second lens, SD14 is the maximum effective semi-aperture of the image side of the seventh lens, SD9 is the maximum effective semi-aperture of the object side of the fifth lens, and SD7 is the maximum effective semi-aperture of the object side of the fourth lens.

[0039] When the optical lens satisfies the relational expression 5.5 < SD1 / SAGs1 < 7, it can provide negative refractive power for the optical lens, which is beneficial to controlling the aperture of the first lens and capturing the light rays entering the optical lens at large angles, expanding the field angle range of the optical lens, and further facilitating the large field angle imaging of the optical lens.

[0040] When the optical lens satisfies the relational expression 1.0 < SD3 / SD14 < 1.2, by controlling the ratio of the maximum effective semi-aperture of the object side of the second lens to the maximum effective semi-aperture of the image side of the seventh lens, it is beneficial to constrain the light path of the optical lens, avoid a large step structure between the second lens and the seventh lens, reduce the deflection angle of the light, avoid introducing excessive aberration, improve the imaging quality, and improve the assembly stability of the optical lens 100.

[0041] When the lens satisfies the relationship 0.8 < SD9 / SD7 < 1.1, the ratio of the maximum effective semi-aperture of the object side of the fifth lens to the maximum effective semi-aperture of the object side of the fourth lens can be reasonably controlled, so that there is no large step difference between the fourth lens and the fifth lens, that is, the step difference between the two is small, which is conducive to the transmission of light between the fourth lens and the fifth lens, and further conducive to reducing the aberration of the optical lens and improving the imaging quality of the optical lens.

[0042] As an optional implementation manner, in the embodiment of the first aspect of the present application, the optical lens satisfies the following relationship:

[0043] 4.5 < R1 / R2 < 5, and / or, |R13 / R14| < 1.2, and / or, 3 < (R5 - R6) / (R5 + R6) < 25;

[0044] Where, R1 is the curvature radius of the object side of the first lens on the optical axis, R2 is the curvature radius of the image side of the first lens on the optical axis, R13 is the curvature radius of the object side of the seventh lens on the optical axis, R14 is the curvature radius of the image side of the seventh lens on the optical axis, R5 is the curvature radius of the object side of the third lens on the optical axis, and R6 is the curvature radius of the image side of the third lens on the optical axis.

[0045] When the optical lens satisfies the relationship 4.5 < R1 / R2 < 5, the curvature radii of the object side and the image side of the first lens near the optical axis can be reasonably controlled, which is conducive to controlling the shape of the first lens, correcting the aberration generated by itself, and improving the imaging quality.

[0046] When the optical lens satisfies the relationship |R13 / R14| < 1.2, the curvature radii of the object side and the image side of the seventh lens near the optical axis can be reasonably controlled, which is conducive to controlling the shape of the seventh lens, correcting the aberration generated by itself, and improving the imaging quality.

[0047] When the optical lens satisfies the relationship 3 < (R5 - R6) / (R5 + R6) < 25, the curvature radii of the object side and the image side of the third lens near the optical axis can be reasonably controlled, which is conducive to controlling the shape of the third lens, correcting the aberration generated by itself, and improving the imaging quality.

[0048] As an optional implementation manner, in the embodiment of the first aspect of the present application, 2.5 < ET1 / CT1 < 3, and / or, 1.3 < CT4 / ET4 < 1.5, and / or, 1.5 < CT7 / ET7 < 2.5, and / or, 0.5 < CT3 / CT2 < 1.5;

[0049] Where, ET1 is the distance in the direction parallel to the optical axis from the maximum effective semi-aperture of the object side of the first lens to the maximum effective semi-aperture of the image side of the first lens, CT1 is the thickness of the first lens on the optical axis, ET4 is the distance in the direction parallel to the optical axis from the maximum effective semi-aperture of the object side of the fourth lens to the maximum effective semi-aperture of the image side of the fourth lens, CT4 is the thickness of the fourth lens on the optical axis, ET7 is the distance in the direction parallel to the optical axis from the maximum effective semi-aperture of the object side of the seventh lens to the maximum effective semi-aperture of the image side of the seventh lens, CT7 is the thickness of the seventh lens on the optical axis, CT3 is the thickness of the third lens on the optical axis, and CT2 is the thickness of the second lens on the optical axis.

[0050] When the optical lens satisfies the relationship 2.5 < ET1 / CT1 < 3, the ratio of the central thickness to the edge thickness of the first lens can be reasonably controlled, so that the overall thickness of the first lens is appropriate, which is conducive to the miniaturization design of the optical lens.

[0051] When the optical lens satisfies the relationship 1.3 < CT4 / ET4 < 1.5, the ratio of the central thickness to the edge thickness of the fourth lens can be reasonably controlled, so that the overall thickness of the fourth lens is appropriate, which is conducive to the miniaturization design of the optical lens.

[0052] When the optical lens satisfies the relationship 1.5 < CT7 / ET7 < 2.5, the ratio of the central thickness to the edge thickness of the seventh lens can be reasonably controlled, so that the overall thickness of the seventh lens is appropriate, which is conducive to the miniaturization design of the optical lens.

[0053] When the optical lens satisfies the relationship 0.5 < CT3 / CT2 < 1.5, the thicknesses of the second lens and the third lens on the optical axis are relatively close, which is conducive to reducing the sensitivity of the optical lens and improving the imaging quality of the optical lens.

[0054] As an optional implementation manner, in the embodiment of the first aspect of the present application, the optical lens satisfies the following relationship:

[0055] 85deg < FOV / FNO < 95deg, and / or, 0.8 < F3 / F4 < 1.1, and / or, 2 < F*tan(FOV / 2) / IMGH < 3.5;

[0056] Where, FNO is the aperture number of the optical lens, IMGH is half of the image height corresponding to the maximum field of view angle of the optical lens, F3 is the focal length of the third lens, F4 is the focal length of the fourth lens, and tan(FOV / 2) is the tangent value of half of the maximum field of view angle of the optical lens.

[0057] When the optical lens satisfies the relationship 85deg < FOV / FNO < 95deg, the ratio of the field angle to the aperture number of the optical lens can be reasonably controlled, so that the optical lens has the characteristics of wide angle and large aperture, enabling wide-angle imaging and increasing the light input of the optical lens, making the optical lens also applicable to night or low-ambient-light scenarios.

[0058] When the optical lens satisfies the relationship 0.8 < F3 / F4 < 1.1, since the third lens and the fourth lens provide positive refractive power, by reasonably controlling the ratio of the focal lengths of the third lens and the fourth lens, the refractive power of the third lens and the fourth lens can be reasonably distributed, so that the optical system has appropriate positive refractive power, facilitating light focusing and also conducive to shortening the total length of the optical lens.

[0059] When the optical lens satisfies the relationship 2 < F * tan(FOV / 2) / IMGH < 3.5, it can achieve miniaturization of the optical lens while enabling the optical lens to achieve a wide-angle large-image-plane design.

[0060] In a second aspect, the present application discloses an imaging module, which includes an image sensor and the optical lens as described in the first aspect above, and the image sensor is disposed on the image side of the optical lens.

[0061] In a third aspect, the present application discloses a terminal device, which includes a housing and the imaging module as described in the second aspect above, and the imaging module is disposed in the housing.

[0062] Compared with the related art, the beneficial effects of the present application are:

[0063] In the optical lens provided by the present application, in order to meet the requirements of miniaturization design of the optical lens while taking into account high imaging quality, the refractive power and surface shape of seven lenses are reasonably configured. That is, the first lens is set to have a negative refractive power, and with the design that its object side and image side are convex and concave respectively near the optical axis, it is beneficial to collect more light into the optical lens and achieve wide-angleization of the optical lens; the second lens has a negative refractive power, and with the design that its object side and image side are concave and convex respectively near the optical axis, it is beneficial for light to enter the optical lens gently, thereby being able to correct the distortion of the optical lens and reduce the aberration generated by the optical lens, improving the imaging quality; the third lens has a positive refractive power, and with the design that its object side and image side are convex near the optical axis, it is beneficial to correct the field curvature of the optical lens; the fourth lens has a positive refractive power, and with the object side and image side of the fourth lens being convex near the optical axis, it is beneficial to correct the aberration of the optical lens; the fifth lens has a refractive power, and the sixth lens has a refractive power, which is beneficial to correct the aberration of the optical lens, improve the imaging quality, and at the same time can reasonably distribute the refractive power of the fifth lens and the sixth lens. The seventh lens has a positive refractive power, and with the design that the object side of the seventh lens is convex near the optical axis, it can correct the off-axis spherical aberration and chromatic dispersion of the optical lens, thereby being beneficial to improving the imaging quality of the optical lens.

[0064] In addition, by limiting the optical lens to satisfy the relational expression 140deg ≤ FOV ≤ 151deg, the optical lens has a large viewing angle and can achieve wide-angle imaging.

[0065] Moreover, the optical lens satisfies 6.4 < TTL / IMGH < 7, which can achieve both miniaturization design of the optical lens and large image plane imaging, thereby being beneficial to improving the imaging clarity of the optical lens and further being beneficial to improving the imaging quality of the optical lens.

[0066] In addition, the optical lens satisfies 1 < SAGs1 / CT1 < 1.25, which can reasonably control the surface shape and thickness of the first lens, thereby controlling the overall thickness of the first lens on the optical axis and making the first lens thinner and lighter. BRIEF DESCRIPTION OF THE DRAWINGS

[0067] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following will briefly introduce the drawings required to be used in the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0068] Figure 1 is a schematic structural diagram of the optical lens disclosed in the first embodiment of the present application;

[0069] Figure 2 These are the spherical aberration diagram, astigmatism curve diagram, and distortion curve diagram of the optical lens disclosed in the first embodiment of this application;

[0070] Figure 3 This is a schematic diagram of the structure of the optical lens disclosed in the second embodiment of this application;

[0071] Figure 4 These are the spherical aberration diagram, astigmatism curve diagram, and distortion curve diagram of the optical lens disclosed in the second embodiment of this application;

[0072] Figure 5 This is a schematic diagram of the structure of the optical lens disclosed in the third embodiment of this application;

[0073] Figure 6 These are the spherical aberration diagram, astigmatism curve diagram, and distortion curve diagram of the optical lens disclosed in the third embodiment of this application;

[0074] Figure 7 This is a schematic diagram of the structure of the optical lens disclosed in the fourth embodiment of this application;

[0075] Figure 8 These are the spherical aberration diagram, astigmatism curve diagram, and distortion curve diagram of the optical lens disclosed in the fourth embodiment of this application;

[0076] Figure 9 This is a schematic diagram of the structure of the optical lens disclosed in the fifth embodiment of this application;

[0077] Figure 10 These are the spherical aberration diagram, astigmatism curve diagram, and distortion curve diagram of the optical lens disclosed in the fifth embodiment of this application;

[0078] Figure 11 This is a schematic diagram of the structure of the optical lens disclosed in the sixth embodiment of this application;

[0079] Figure 12 These are the spherical aberration diagram, astigmatism curve diagram, and distortion curve diagram of the optical lens disclosed in the sixth embodiment of this application;

[0080] Figure 13 This is a schematic diagram of the camera module disclosed in this application;

[0081] Figure 14 This is a structural diagram of a mobile phone when the terminal device disclosed in this application is a mobile phone;

[0082] Figure 15 This is a structural diagram of the terminal device disclosed in this application when it is a car. Detailed Implementation

[0083] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0084] In this invention, the terms "inner," "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. These terms are primarily for the purpose of better describing the invention and its embodiments, and are not intended to limit the indicated device, element, or component to having a specific orientation, or to be constructed and operated in a specific orientation.

[0085] Furthermore, in addition to indicating direction or positional relationship, some of the aforementioned terms may also have other meanings. For example, the term "above" may also be used in certain situations to indicate a dependency or connection. Those skilled in the art can understand the specific meaning of these terms in this invention based on the specific circumstances.

[0086] Furthermore, the terms "set" and "located in" should be interpreted broadly. Those skilled in the art can understand the specific meaning of these terms in this invention based on the specific circumstances.

[0087] Furthermore, the terms "first," "second," etc., are primarily used to distinguish different devices, elements, or components (which may be the same or different in specific type and construction), and are not intended to indicate or imply the relative importance or quantity of the indicated devices, elements, or components. Unless otherwise stated, "a plurality of" means two or more.

[0088] The technical solution of this application will be further described below with reference to the embodiments and accompanying drawings.

[0089] Please see Figure 1This application discloses an optical lens 100, which 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, and a seventh lens L7 arranged sequentially along the optical axis from the object side to the image side. The first lens L1 has negative refractive power, the second lens L2 has negative refractive power, the third lens L3 has positive refractive power, the fourth lens L4 has positive refractive power, the fifth lens L5 has either positive or negative refractive power, the sixth lens L6 has either positive or negative refractive power, and the seventh lens L7 has positive refractive power. During imaging, light rays enter sequentially from the object side of the first lens L1 through the first lens L1, second lens L2, third lens L3, fourth lens L4, fifth lens L5, sixth lens L6, and seventh lens L7, and are ultimately imaged onto the imaging plane IMG of the optical lens 100.

[0090] Furthermore, the object-side surface S1 of the first lens L1 is convex near the optical axis, and the image-side surface S2 of the first lens L1 is concave near the optical axis; the object-side surface S3 of the second lens L2 is concave near the optical axis, and the image-side surface S4 of the second lens L2 is convex near the optical axis; the object-side surface S5 of the third lens L3 is convex near the optical axis, and the image-side surface S6 of the third lens L3 is convex near the optical axis; the object-side surface S7 of the fourth lens L4 is convex near the optical axis. The image-side surface S8 of the fourth lens L4 is convex near the optical axis; the object-side surface S9 and the image-side surface S10 of the fifth lens L5 can both be convex or concave near the optical axis; the object-side surface S11 of the sixth lens L6 can be concave or convex near the optical axis, and the image-side surface S12 of the sixth lens L6 can be convex or concave near the optical axis; the object-side surface S13 of the seventh lens L7 is convex near the optical axis, and the image-side surface S14 of the seventh lens can be convex or concave near the optical axis.

[0091] Optionally, all seven lenses can be made of plastic, making the optical lens 100 lighter and easier to process for complex shapes. Alternatively, all seven lenses can be made of glass, or a design can be used where some lenses are plastic and some are glass.

[0092] For example, the second lens L1 and the seventh lens L7 can be plastic lenses, while the other lenses can be glass lenses. In this way, the optical lens 100 adopts a glass-plastic hybrid lens architecture, which can reduce the manufacturing cost of the optical lens 100.

[0093] Optionally, the first lens L1, the third lens L3, the fourth lens L4, the fifth lens L5, and the sixth lens L6 can all be spherical lenses, while the second lens L2 and the seventh lens L7 can be aspherical lenses. Thus, combining spherical and aspherical lenses can improve higher-order aberrations and thereby enhance image quality. Of course, in other embodiments, the first lens L1 to the seventh lens L7 can all be spherical lenses, or the first lens L1 to the seventh lens L7 can all be aspherical lenses. The specific choice can be adjusted according to actual imaging requirements, and this embodiment does not impose specific limitations on this.

[0094] In some embodiments, the optical lens 100 may further include an aperture stop STO, which is disposed between the third lens L3 and the fourth lens L4. The use of a centrally located aperture stop STO is beneficial for aberration correction of the optical lens 100. Of course, as other examples, the aperture stop STO may also be disposed between other lenses, such as between the second lens L2 and the third lens L3, or between the first lens L1 and the second lens L2. The specific placement can be determined according to actual needs, and this embodiment does not impose specific limitations on this.

[0095] In some embodiments, the optical lens 100 further includes an infrared filter IR, which is disposed between the image-side surface S14 of the seventh lens and the imaging surface IMG of the optical lens 100. In this embodiment, the infrared cut-off filter IR can be selected to filter out light of other wavelengths, such as infrared light, while allowing only visible light to pass through, making the image more consistent with the visual experience of the human eye. Of course, the infrared bandpass filter IR can also be selected to filter out light of other wavelengths, such as visible light, while allowing only infrared light to pass through. By filtering out light of other wavelengths, such as visible light, the image quality is improved; and the optical lens 100 can be used as an infrared optical lens, that is, the optical lens 100 can also image and obtain better image effects in dim environments and other special application scenarios. Preferably, the filter IR can be made of glass. Of course, in other embodiments, the filter IR can also be made of optical glass with a coating, or a filter IR of other materials, which can be selected according to actual needs. This embodiment does not make specific limitations.

[0096] In some embodiments, the optical lens 100 also includes a protective glass CG disposed between the filter IR and the imaging surface IMG, so that it can be close to the image sensor during subsequent assembly, thereby playing a protective role.

[0097] In some embodiments, the optical lens 100 satisfies the relationship 140deg≤FOV≤151deg, where FOV is the maximum field of view of the optical lens 100. When the optical lens 100 satisfies this relationship, it can have a large field of view, thereby enabling wide-angle imaging.

[0098] In some embodiments, the optical lens 100 satisfies the relation FNO < 1.65, where FNO is the aperture number of the optical lens 100. In this way, the optical lens 100 has the characteristic of a large aperture, which can increase the amount of light entering the optical lens 100, so that the optical lens 100 can also be applicable to scenarios at night or with low ambient brightness. Optionally, the relation can further satisfy 1.55 < FNO < 1.65, so as to meet the large aperture characteristic of the optical lens 100.

[0099] In some embodiments, the optical lens 100 satisfies the relation 7.5 < TTL / F < 8, where TTL is the distance from the object side surface S1 of the first lens L1 to the imaging surface of the optical lens 100 on the optical axis, and F is the focal length of the optical lens 100. When the optical lens 100 satisfies 7.5 < TTL / F < 8, it can achieve the miniaturization of the optical lens 100 while also enabling the optical lens 100 to have the characteristic of wide-angle.

[0100] In some embodiments, the optical lens 100 satisfies the relation 1.1 < IMGH / F < 1.3, where IMGH is half of the image height corresponding to the maximum field angle of the optical lens 100. When the optical lens 100 satisfies 1.1 < IMGH / F < 1.3, it can enable the optical lens 100 to achieve a wide-angle large image surface design, and further achieve high-pixel imaging.

[0101] In some embodiments, the optical lens 100 satisfies the relation 6.4 < TTL / IMGH < 7, so as to reasonably control the relationship between the total length of the optical lens 100 and the image height corresponding to the maximum field angle of the optical lens 100, so that when the optical lens 100 realizes the miniaturization design, it can also have the characteristic of a large image surface, which is beneficial to improving the resolution and clarity of the optical lens 100 and achieving high-definition imaging.

[0102] In some embodiments, the optical lens 100 satisfies the relation 2 < F*tan(FOV / 2) / IMGH < 3.5, where tan(FOV / 2) is the tangent value of half of the maximum field angle of the optical lens 100. When the optical lens 100 satisfies 2 < F*tan(FOV / 2) / IMGH < 3.5, it can achieve the miniaturization of the optical lens 100 while also enabling the optical lens 100 to achieve a wide-angle large image surface design.

[0103] In some embodiments, the optical lens 100 satisfies the relation 5.5 < SD1 / SAGs1 < 7, where SD1 is the maximum effective semi-aperture of the object side S1 of the first lens L1, and SAGs1 is the distance in the optical axis direction from the maximum effective semi-aperture of the object side S1 of the first lens L1 to the intersection of the object side S1 of the first lens L1 and the optical axis (i.e., the sag of the object side S1 of the first lens L1). By controlling the ratio of the maximum effective semi-aperture of the object side S1 of the first lens L1 and the sag of the object side S1 of the first lens L1, a negative refractive power can be provided for the optical lens 100, which is beneficial to controlling the aperture of the first lens L1 and capturing the light rays entering the optical lens 100 at large angles, expanding the field angle range of the optical lens 100, and further facilitating the realization of large field angle imaging of the optical lens 100.

[0104] In some embodiments, the optical lens 100 satisfies the relation 1 < SAGs1 / CT1 < 1.25, where SAGs1 is the distance in the optical axis direction from the maximum effective semi-aperture of the object side S1 of the first lens L1 to the intersection of the object side S1 of the first lens L1 and the optical axis (i.e., the sag of the object side S1 of the first lens L1), and CT1 is the thickness of the first lens L1 on the optical axis. The surface shape of the first lens L1 and the thickness of the first lens L1 can be reasonably controlled, so as to control the overall thickness of the first lens L1 on the optical axis, making the first lens L1 thinner and lighter.

[0105] In some embodiments, the optical lens 100 satisfies the relation 85deg < FOV / FNO < 95deg, which can reasonably control the ratio of the field angle and the aperture number of the optical lens 100, so that the optical lens 100 has the characteristics of wide angle and large aperture, can achieve wide angle imaging and improve the light input of the optical lens 100, and enables the optical lens 100 to be also applicable to the scenarios at night or with low ambient brightness.

[0106] In some embodiments, the optical lens 100 satisfies the relation FOV*F / IMGH > 100deg, which can make the optical lens 100 have relatively small optical distortion and image deformation during the imaging process, ensure the imaging quality, facilitate the subsequent identification and determination of its imaging details, and provide good imaging assistance for driving assistance. Preferably, this relation can further satisfy 120deg < FOV*F / IMGH < 130deg, which is further beneficial to improving the imaging quality of the optical lens.

[0107] In some embodiments, the optical lens 100 satisfies the relationship -3 < F1 / F < -1, where F1 is the focal length of the first lens L1. By controlling the ratio of the focal length of the first lens L1 to the focal length of the optical lens 100, the focal length of the first lens L1 can be reasonably allocated, so that the first lens L1 can provide negative refractive power, and a reasonable refractive power distribution can be achieved for the first lens L1, which is beneficial to light convergence. At the same time, it helps to reduce the spherical aberration, chromatic aberration, and distortion of the first lens L1 to a reasonable level, reduces the design difficulty of the subsequent lenses, and improves the overall resolution of the optical lens 100 while strengthening the peripheral aberration correction of the optical lens 100. In addition, it is beneficial to compress the size of the first lens L1, thereby helping to form a small-sized optical lens 100.

[0108] In some embodiments, the optical lens 100 satisfies the relationship -20 < F2 / F < -5, where F2 is the focal length of the second lens L2. By controlling the ratio of the focal length of the second lens L2 to the focal length of the optical lens 100, the focal length of the second lens L2 can be reasonably allocated, the angle of the light incident from the first lens L1 can be reduced, and at the same time, it is beneficial to improve the overall resolution of the optical lens 100 while strengthening the peripheral aberration correction of the optical lens 100.

[0109] In some embodiments, the optical lens 100 satisfies the relationship 0.8 < F3 / F4 < 1.1, where F3 is the focal length of the third lens L3 and F4 is the focal length of the fourth lens L4. Since both the third lens L3 and the fourth lens L4 have positive refractive power, when this relationship is satisfied, the ratio of the focal lengths of the third lens L3 and the fourth lens L4 can be reasonably controlled, so as to reasonably allocate the refractive powers of the third lens L3 and the fourth lens L4, which is beneficial to providing positive refractive power for the optical lens 100, thereby providing better light convergence ability for the optical lens 100, and at the same time, it can correct the distortion of the optical lens 100 and reduce the aberration generated by the optical lens 100, improving the imaging quality of the optical lens 100.

[0110] In some embodiments, the optical lens 100 satisfies the relationship 2.5 < F3 / F < 3.5, where F3 is the focal length of the third lens L3. When this relationship is satisfied, the focal length of the third lens L3 can be reasonably allocated, so that the third lens L3 can provide positive refractive power for the optical lens 100, thereby providing better light convergence ability for the optical lens 100, and at the same time, it can correct the distortion of the optical lens​​In some embodiments, the optical lens 100 satisfies the relation 2 < F4 / F < 4, where F4 is the focal length of the fourth lens L4. When this relation is satisfied, the focal length of the fourth lens L4 can be reasonably allocated, enabling the fourth lens L4 to provide a positive refractive power to the optical lens 100, thereby providing better light converging ability to the optical lens 100, while being able to correct the distortion of the optical lens 100 and reduce the aberration generated by the optical lens 100, improving the imaging quality of the optical lens 100.

[0112] In some embodiments, the optical lens 100 satisfies the relation |F5 / F| < 10, where F5 is the focal length of the fifth lens L5. When this relation is satisfied, the focal length of the fifth lens L5 can be reasonably allocated, and the refractive power of the fifth lens can be reasonably allocated, thereby providing better light converging ability to the optical lens 100, while being able to correct the distortion of the optical lens 100 and reduce the aberration generated by the optical lens 100, improving the imaging quality of the optical lens 100.

[0113] In some embodiments, the optical lens 100 satisfies the relation |F6 / F| < 5, where F6 is the focal length of the sixth lens L6. When this relation is satisfied, the focal length of the sixth lens L6 can be reasonably allocated, and the refractive power of the fifth lens can be reasonably allocated, thereby being able to correct the distortion of the optical lens 100 and reduce the aberration generated by the optical lens 100, improving the imaging quality of the optical lens 100.

[0114] In some embodiments, the optical lens 100 satisfies the relation 2 < F7 / F < 10, where F7 is the focal length of the seventh lens L7. Since the seventh lens L7 provides a positive refractive power to the optical lens 100 and provides the main light converging ability of the lens group of the optical lens 100, therefore, by controlling the ratio relationship between the focal length of the seventh lens L7 and the focal length of the optical lens 100, it is beneficial to reasonably allocate the positive optical power of the optical lens 100 and shorten the overall optical length of the optical lens 100. When exceeding the upper limit of the relation, the focal length of the seventh lens L7 becomes larger, the light is deflected greatly, and it is easy to increase the aberration of the off-axis field. When lower than the lower limit of the relation, the focal length of the optical lens 100 is too large, and the overall length of the optical lens 100 is too long, which is not conducive to the miniaturization design of the optical lens 100. Optionally, the relation can further satisfy 4 < F7 / F < 20, in this way, the focal length of the seventh lens L7 is reasonable, due to the miniaturization design of the optical lens 100.

[0115] In some embodiments, the optical lens 100 satisfies the relation 0.9 < BFL / F < 1.2, where BFL is the distance from the image side S14 of the seventh lens L7 to the imaging surface of the optical lens 100 on the optical axis. When this relation is satisfied, the back focal length of the optical lens 100 can be effectively controlled within a reasonable range, enabling the optical lens 100 to achieve a miniaturization design.

[0116] In some embodiments, the optical lens 100 satisfies the relation 5 < F56 / F < -2, where F56 is the combined focal length of the fifth lens L5 and the sixth lens L6. Since the fifth lens L5 and the sixth lens L6 are cemented lenses, when this relation is satisfied, the ratio of the combined focal length of the fifth lens L5 and the sixth lens L6 to the focal length of the optical lens 100 can be reasonably configured, so that the refractive powers of the fifth lens L5 and the sixth lens L6 can be reasonably distributed, thereby providing the optical lens 100 with better light converging ability, while being able to correct the distortion of the optical lens 100 and reduce the aberration generated by the optical lens, and improving the imaging quality of the optical lens.

[0117] In some embodiments, the optical lens 100 satisfies the relation |F567 / F| > 5, where F567 is the combined focal length of the fifth lens L5, the sixth lens L6, and the seventh lens L7. When this relation is satisfied, the combined focal length of the rear lens group of the optical lens 100 (i.e., the combined focal length of the fifth lens L5, the sixth lens L6, and the seventh lens L7) can be reasonably controlled, so that the refractive powers of the fifth lens L5, the sixth lens L6, and the seventh lens L7 can be reasonably distributed, and further provide the optical lens 100 with better light converging ability, while being able to correct the distortion of the optical lens 100 and reduce the aberration generated by the optical lens, and improving the imaging quality of the optical lens 100. Optionally, this relation can further satisfy 6 < |F567 / F| < 40, which is further beneficial to improving the imaging quality of the optical lens 100.

[0118] In some embodiments, the optical lens 100 satisfies the relation 2 < F123 / F < 6, where F123 is the combined focal length of the first lens L1, the second lens L2, and the third lens L3. When this relation is satisfied, the combined focal length of the front lens group of the optical lens 100 (i.e., the combined focal length of the first lens L1, the second lens L2, and the third lens L3) can be reasonably controlled, so that the refractive powers of the first lens L1, the second lens L2, and the third lens L3 can be reasonably distributed, and further provide the optical lens 100 with better light converging ability, so that more light can be converged by the front lens group and smoothly transition to the rear lens group, thereby reducing the sensitivity of the optical lens 100 and being beneficial to improving the imaging quality of the optical lens 100.

[0119] In some embodiments, the optical lens 100 satisfies the relation -10 < F1 / CT1 < -5, where CT1 is the thickness of the first lens L1 on the optical axis. When this relation is satisfied, the refractive power and thickness of the first lens L1 can be reasonably configured, so that the incident angle of light in the optical lens 100 can be effectively controlled, reducing the sensitivity of the optical lens 100, being beneficial to correcting the aberration generated by the optical lens 100, and further being beneficial to improving the imaging quality of the optical lens 100.

[0120] In some embodiments, the optical lens 100 satisfies the relation -20 < F2 / CT2 < -5, where CT2 is the thickness of the second lens L2 on the optical axis. When this relation is satisfied, the refractive power and thickness of the second lens L2 can be reasonably configured, so that the incident angle of light in the optical lens 100 can be effectively controlled, the sensitivity of the optical lens 100 can be reduced, it is beneficial to correct the aberration generated by the optical lens 100, and further beneficial to improving the imaging quality of the optical lens 100.

[0121] In some embodiments, the optical lens 100 satisfies the relation 2 < F3 / CT3 < 4, where CT3 is the thickness of the third lens L3 on the optical axis. When this relation is satisfied, the refractive power and thickness of the third lens L3 can be reasonably configured, so that the light enters the optical lens 100 more gently, the sensitivity of the optical lens 100 can be reduced, it is beneficial to correct the aberration generated by the optical lens 100, and further beneficial to improving the imaging quality of the optical lens 100.

[0122] In some embodiments, the optical lens 100 satisfies the relation 2 < F4 / CT4 < 6, where CT4 is the thickness of the fourth lens L4 on the optical axis. When this relation is satisfied, the refractive power and thickness of the fourth lens L4 can be reasonably configured, so that the light enters the optical lens 100 more gently, the sensitivity of the optical lens 100 can be reduced, it is beneficial to correct the aberration generated by the optical lens 100, and further beneficial to improving the imaging quality of the optical lens 100.

[0123] In some embodiments, the optical lens 100 satisfies the relation 2 < |F5 / CT5| < 20, where CT5 is the thickness of the fifth lens L5 on the optical axis. When this relation is satisfied, the refractive power and thickness of the fifth lens L5 can be reasonably configured, so that the light enters the optical lens 100 more gently, the sensitivity of the optical lens 100 can be reduced, it is beneficial to correct the aberration generated by the optical lens 100, and further beneficial to improving the imaging quality of the optical lens 100.

[0124] In some embodiments, the optical lens 100 satisfies the relation 3 < |F6 / CT6| < 15, where CT6 is the thickness of the sixth lens L6 on the optical axis. When this relation is satisfied, the refractive power and thickness of the sixth lens L6 can be reasonably configured, so that the light enters the optical lens 100 more gently, the sensitivity of the optical lens 100 can be reduced, it is beneficial to correct the aberration generated by the optical lens 100, and further beneficial to improving the imaging quality of the optical lens 100.

[0125] In some embodiments, the optical lens 100 satisfies the relation 2 < F7 / CT7 < 20, where CT7 is the thickness of the seventh lens L7 on the optical axis. When this relation is satisfied, the refractive power and thickness of the seventh lens L7 can be reasonably configured, so that light can enter the optical lens 100 more gently, reducing the sensitivity of the optical lens 100, which is beneficial to correcting the aberration generated by the optical lens 100, and thus beneficial to improving the imaging quality of the optical lens 100.

[0126] In some embodiments, the optical lens 100 satisfies the relation 1 < (CT5 + CT6 + CT7) / F < 1.5. When the optical lens satisfies 1 < (CT5 + CT6 + CT7) / F < 1.5, the ratio of the combined thickness of the rear lens group (i.e., the sum of the central thicknesses of the fifth lens L5, the sixth lens L6, and the seventh lens L7) to the focal length of the optical lens 100 can be reasonably controlled, so that light can be more converged, which is beneficial to reducing the sensitivity of the optical lens 100, beneficial to correcting the aberration generated by the optical lens 100, and thus beneficial to improving the imaging quality of the optical lens 100.

[0127] In some embodiments, the optical lens 100 satisfies the relation 4.5 < R1 / R2 < 5. When this relation is satisfied, it is beneficial to control the curvature radii of the object side surface S1 and the image side surface of the first lens L1, so that the surface profiles of the object side surface S1 and the image side surface of the first lens L1 are not overly curved, thus being beneficial to controlling the shape of the first lens L1.

[0128] In some embodiments, the optical lens 100 satisfies the relation R3 / R4 < 1, where R4 is the curvature radius of the image side surface S4 of the second lens L2 near the optical axis, and R3 is the curvature radius of the object side surface S3 of the second lens L2 near the optical axis. When this relation is satisfied, the curvature radii of the object side surface S3 and the image side surface of the second lens L2 can be reasonably controlled, so that the surface profiles of the object side surface S3 and the image side surface of the second lens L2 are not overly curved, thus being beneficial to controlling the shape of the second lens L2.

[0129] In some embodiments, the optical lens 100 satisfies the relation 3 < |(R5 - R6) / (R5 + R6)| < 25, where R6 is the curvature radius of the image side surface S6 of the third lens L3 near the optical axis, and R5 is the curvature radius of the object side surface S5 of the third lens L3 near the optical axis. When this relation is satisfied, the curvature radii of the object side surface S5 and the image side surface of the third lens L3 can be reasonably controlled, so that the surface profiles of the object side surface S5 and the image side surface of the third lens L3 are not overly curved, thus being beneficial to controlling the shape of the third lens L3.

[0130] In some embodiments, the optical lens 100 satisfies the relation -5 < R8 / R7 < -1, where R8 is the radius of curvature of the image side S8 of the fourth lens L4 at the near optical axis, and R7 is the radius of curvature of the object side S7 of the fourth lens L4 at the near optical axis. When this relation is satisfied, the radii of curvature of the object side S7 and the image side of the fourth lens L4 can be reasonably controlled, so that the surface profiles of the object side S7 and the image side of the fourth lens L4 are not overly curved, which is beneficial to controlling the shape of the fourth lens L4.

[0131] In some embodiments, the optical lens 100 satisfies the relation -1 < R9 / R10 < -10, where R10 is the radius of curvature of the image side S10 of the fifth lens L5 at the near optical axis, and R9 is the radius of curvature of the object side S9 of the fifth lens L5 at the near optical axis. When this relation is satisfied, the radii of curvature of the object side S9 and the image side of the fifth lens L5 can be reasonably controlled, so that the surface profiles of the object side S9 and the image side of the fifth lens L5 are not overly curved, which is beneficial to controlling the shape of the fifth lens L5.

[0132] In some embodiments, the optical lens 100 satisfies the relation -2 < R11 / R12 < 0, where R12 is the radius of curvature of the image side S12 of the sixth lens L6 at the near optical axis, and R11 is the radius of curvature of the object side S11 of the sixth lens L6 at the near optical axis. When this relation is satisfied, the radii of curvature of the object side S11 and the image side of the sixth lens L6 can be reasonably controlled, so that the surface profiles of the object side S11 and the image side of the sixth lens L6 are not overly curved, which is beneficial to controlling the shape of the sixth lens L6.

[0133] In some embodiments, the optical lens 100 satisfies the relation |R13 / R14| < 1.2, where R14 is the radius of curvature of the image side S14 of the seventh lens L7 at the near optical axis, and R13 is the radius of curvature of the object side S13 of the seventh lens L7 at the near optical axis. When this relation is satisfied, the radii of curvature of the object side S13 and the image side of the seventh lens L7 can be reasonably controlled, so that the surface profiles of the object side S13 and the image side of the seventh lens L7 are not overly curved, which is beneficial to controlling the shape of the seventh lens L7.

[0134] In some embodiments, the optical lens 100 satisfies the relation 2.5 < ET1 / CT1 < 3, where ET1 is the distance in the direction parallel to the optical axis from the maximum effective semi-aperture of the object side S1 of the first lens L1 to the maximum effective semi-aperture of the image side S2 of the first lens L1 (i.e., the edge thickness of the first lens L1). When the optical lens 100 satisfies the relation 2.5 < ET1 / CT1 < 3, the ratio of the center thickness to the edge thickness of the first lens L1 can be reasonably controlled, so that the overall thickness of the first lens L1 is appropriate, which is beneficial to the miniaturized design of the optical lens 100.

[0135] In some embodiments, the optical lens 100 satisfies the relation 1.3 < CT4 / ET4 < 1.5, where ET4 is the distance in the direction parallel to the optical axis from the maximum effective semi-aperture of the object side S7 of the fourth lens L4 to the maximum effective semi-aperture of the image side S8 of the fourth lens L (i.e., the edge thickness of the fourth lens L4). When the optical lens 100 satisfies the relation 1.3 < CT4 / ET4 < 1.5, the ratio of the central thickness to the edge thickness of the fourth lens L4 can be reasonably controlled, so that the overall thickness of the fourth lens L4 is appropriate, which is beneficial to the miniaturization design of the optical lens 100.

[0136] In some embodiments, the optical lens 100 satisfies the relation CT6 / ET6 < 4, where ET6 is the distance in the direction parallel to the optical axis from the maximum effective semi-aperture of the object side S11 of the sixth lens L6 to the maximum effective semi-aperture of the image side S12 of the sixth lens L6 (i.e., the edge thickness of the sixth lens L6). When the optical lens 100 satisfies the relation CT6 / ET6 < 4, the ratio of the central thickness to the edge thickness of the sixth lens L6 can be reasonably controlled, so that the overall thickness of the sixth lens L6 is appropriate, which is beneficial to the miniaturization design of the optical lens 100.

[0137] In some embodiments, the optical lens 100 satisfies the relation 1.5 < CT7 / ET7 < 2.5, where ET7 is the distance in the direction parallel to the optical axis from the maximum effective semi-aperture of the object side S13 of the seventh lens L7 to the maximum effective semi-aperture of the image side S14 of the seventh lens L7 (i.e., the edge thickness of the seventh lens L7). When the optical lens 100 satisfies the relation 1.5 < CT7 / ET7 < 2.5, the ratio of the central thickness to the edge thickness of the fourth lens L4 can be reasonably controlled, so that the overall thickness of the seventh lens L7 is appropriate, which is beneficial to the miniaturization design of the optical lens 100.

[0138] In some embodiments, the optical lens 100 satisfies the relation 0.9 < CT3 / CT2 < 1.5, where CT3 is the thickness of the third lens L3 on the optical axis and CT2 is the thickness of the second lens L2 on the optical axis. When this relation is satisfied, the thicknesses of the second lens L2 and the third lens L3 on the optical axis are relatively close, which is beneficial to reducing the sensitivity of the optical lens 100 and improving the imaging quality of the optical lens 100.

[0139] In some embodiments, the optical lens 100 satisfies the relationship 5 < TTL / CTMAX < 7, where CTMAX is the maximum thickness on the optical axis among the first lens L1 to the seventh lens L7. When this relationship is satisfied, the proportion of the maximum central thickness in the total length of the optical lens 100 can be reasonably configured, so that the overall structure of the optical lens 100 is compact, which is beneficial to the miniaturization design of the optical lens 100.

[0140] In some embodiments, the optical lens 100 satisfies the relationship 1.6 < TTL / ΣCT < 2, where ΣCT is the sum of the thicknesses of all the lenses on the optical axis among the first lens L1 to the seventh lens L7. When this relationship is satisfied, the sum of the thicknesses of all the lenses of the optical lens 100 is reasonable, so that the overall arrangement of the optical lens 100 is relatively compact, which is beneficial to the miniaturization design of the optical lens 100.

[0141] In some embodiments, the optical lens 100 satisfies the relationship 0.8 < SD9 / SD7 < 1.1, where SD7 is the maximum effective semi-aperture of the object side S7 of the fourth lens L4, and SD9 is the maximum effective semi-aperture of the object side S9 of the fifth lens L5. When the optical lens 100 satisfies this relationship, the maximum effective semi-aperture of the object side S9 of the fifth lens L5 and the maximum effective semi-aperture of the object side S7 of the fourth lens L4 can be reasonably controlled, so that the gap between the maximum effective semi-apertures of the fifth lens L5 and the fourth lens L4 is not too large, thereby reducing the step difference between the fifth lens L5 and the fourth lens L4, making the transition of light between the fifth lens L5 and the fourth lens L4 smoother, reducing the generated aberration, and thus improving the imaging quality of the optical lens 100.

[0142] In some embodiments, the optical lens 100 satisfies the relationship 1.0 < SD3 / SD14 < 1.2, where SD14 is the maximum effective semi-aperture of the image side S14 of the seventh lens L7, and SD3 is the maximum effective semi-aperture of the object side S3 of the second lens L2. When the optical lens 100 satisfies this relationship, the maximum effective semi-apertures of the object side S3 of the second lens L2 and the image side S14 of the seventh lens L7 can be reasonably controlled, which is beneficial to restricting the light path of the optical lens 100, and is beneficial to avoiding a large step difference structure between the second lens L2 and the seventh lens L7, reducing the deflection angle of light, avoiding introducing excessive aberration, being beneficial to improving the imaging quality, and being beneficial to improving the assembly stability of the optical lens 100.

[0143] In some embodiments, the optical lens 100 satisfies the relationship 25 < SD8 / CT45 < 35. Here, SD8 is the maximum effective semi-aperture of the image side S8 of the fourth lens L4, and CT45 is the distance on the optical axis between the image side S8 of the fourth lens L4 and the object side L9 of the fifth lens L5. By controlling the ratio of the maximum effective semi-aperture of the fourth lens L4 and the distance between the fourth lens L4 and the fifth lens L5 on the optical axis, the arrangement between the fourth lens L4 and the fifth lens L5 can be made compact, so that light can better transition from the fourth lens L4 to the fifth lens L5, reducing the sensitivity of the optical lens 100 and being beneficial to improving the imaging quality.

[0144] In some embodiments, the optical lens 100 satisfies the relationship -0.3 < EDS*tan(FOV) / F < -1. Here, EDS is the aperture of the diaphragm STO of the optical lens 100, and tan(FOV) is the tangent value of the maximum field angle of the optical lens. By reasonably matching the relationship between the maximum field angle of the optical lens 100, the aperture of the diaphragm STO, and the focal length of the optical lens 100, sufficient image plane brightness and a small amount of distortion can be ensured within the wide-angle imaging range of the optical lens 100, ensuring that the optical lens 100 has high imaging quality characteristics and can well capture the details of the photographed object.

[0145] In some embodiments, the optical lens 100 satisfies the relationship 1.4*10 -6 / k.mm < |(a5 - a6) / (CT5 - CT6)| < 3.5*10 -6 / k.mm. Here, a5 is the thermal expansion coefficient of the fifth lens L5 within a preset range, and a6 is the thermal expansion coefficient of the sixth lens L6 within a preset range. As described above, the fifth lens L5 and the sixth lens L6 form a cemented lens. Based on this, when the relationship is satisfied, the central thicknesses of the fifth lens L5 and the sixth lens L6 can be reasonably controlled, thereby avoiding the situation of delamination due to too large difference in thermal expansion coefficients between the two.

[0146] It can be understood that the preset temperature can be -30°C to 70°C. Here, the units of a5 and a6 are both 10 -6 / k.

[0147] The optical lens 100 of this embodiment will be described in detail below with specific parameters.

[0148] First Embodiment

[0149] The structural schematic diagram of the optical lens 100 disclosed in the first embodiment of the present application is as Figure 1As shown, the optical lens 100 includes a first lens L1, a second lens L2, a third lens L3, an aperture stop STO, a fourth lens L4, a fifth lens L5, a sixth lens L6, a seventh lens L7, a filter IR, and a protective glass CG, arranged sequentially along the optical axis from the object side to the image side.

[0150] Among them, the first lens L1 has negative refractive power, the second lens L2 has negative refractive power, the third lens L3 has positive refractive power, the fourth lens L4 has positive refractive power, the fifth lens L5 has negative refractive power, the sixth lens L6 has positive refractive power, and the seventh lens L7 has positive refractive power.

[0151] In this embodiment, the object-side surface S1 of the first lens L1 is convex near the optical axis, and the image-side surface S2 of the first lens L1 is concave near the optical axis; the object-side surface S3 of the second lens L2 is concave near the optical axis, and the image-side surface S4 of the second lens L2 is convex near the optical axis; the object-side surface S5 of the third lens L3 is convex near the optical axis, and the image-side surface S6 of the third lens L3 is convex near the optical axis; the object-side surface S7 of the fourth lens L4 is... The image-side surface S8 of the fourth lens L4 is convex near the optical axis; the object-side surface S9 and image-side surface S10 of the fifth lens L5 are both concave near the optical axis; the object-side surface S11 of the sixth lens L6 is convex near the optical axis, and the image-side surface S12 of the sixth lens L6 is also convex near the optical axis; the object-side surface S13 of the seventh lens L7 is convex near the optical axis, and the image-side surface S14 of the seventh lens is concave near the optical axis.

[0152] Specifically, taking the optical lens 100 with a focal length F = 4.058 mm, an aperture number FNO = 1.6, and a maximum field of view (FOV) of 140 degrees as an example, other parameters of the optical lens 100 are given in Table 1 below. The elements along the optical axis of the optical lens 100, from the object side to the image side, are arranged sequentially according to the order of the elements in Table 1 from top to bottom. In the same lens, the surface with the smaller surface number is the object side of the lens, and the surface with the larger surface number is the image side of the lens. For example, surface numbers 1 and 2 correspond to the object side S1 and image side S2 of the first lens L1, respectively. The Y-radius in Table 1 is the radius of curvature of the corresponding object side or image side at the optical axis. The first value in the "thickness" parameter column of the lens is the thickness of the lens on the optical axis, and the second value is the distance from the image side of the lens to the next surface on the optical axis. The value of the stop STO in the "Thickness" parameter column represents the distance on the optical axis from the stop STO to the vertex of the next surface (the vertex refers to the intersection of the surface and the optical axis). By default, the direction from the object side of the first lens L1 to the image side of the last lens is the positive direction of the optical axis. When this value is negative, it indicates that the stop STO is set on the image side of the next surface vertex. If the stop STO thickness is positive, the stop STO is on the object side of the next surface vertex. It is understood that the units for the Y-radius, thickness, and focal length in Table 1 are all mm. Furthermore, the refractive index, Abbe number, etc., in Table 1 are obtained at a reference wavelength of 587.6 nm, and the focal length is obtained at a reference wavelength of 546.1 nm.

[0153] In the first embodiment, the object-side surface and image-side surface of the second lens L2 and the seventh lens L7 are both aspherical. Therefore, the surface shape x of each aspherical lens can be defined using, but is not limited to, the following aspherical formula:

[0154]

[0155] Where x is the distance vector from the vertex of the aspherical surface at a height h along the optical axis; c is the curvature of the aspherical surface at the optical axis, c = 1 / Y (i.e., the paraxial curvature c is the reciprocal of the radius of curvature Y in Table 1 above); K is the conic coefficient; Ai is the i-th order correction coefficient of the aspherical surface. Table 2 below gives the higher-order coefficients A4, A6, A8, A10, A12, A14, and A16 of the aspherical surfaces of the second lens L2 and the seventh lens L7.

[0156] Table 1

[0157]

[0158]

[0159] Table 2

[0160]

[0161] Please see Figure 2 (A) in the middle Figure 2 Figure (A) shows the spherical aberration curves of the optical lens 100 in the first embodiment at wavelengths of 656 nm, 588 nm, 546 nm, 486 nm, 436 nm, and 410 nm. The horizontal axis along the X-axis represents the focus shift in mm, and the vertical axis along the Y-axis represents the normalized field of view. Figure 2 As can be seen from (A) in the first embodiment, the spherical aberration value of the optical lens 100 is better, indicating that the imaging quality of the optical lens 100 in this embodiment is better.

[0162] Please see Figure 2 (B) in the middle Figure 2 (B) in the figure shows the light astigmatism diagram of the optical lens 100 in the first embodiment at a wavelength of 546 nm. The horizontal axis along the X-axis represents the focus shift in mm, and the vertical axis along the Y-axis represents the field of view in degrees. In the astigmatism curve diagram, T represents the curvature of the imaging plane IMG in the meridional direction, and S represents the curvature of the imaging plane IMG in the sagittal direction. Figure 2 As can be seen from (B) in the figure, at this wavelength, the field curvature of the optical lens 100 is small, and the field curvature and astigmatism of each field of view are well corrected. The center and edge of the field of view have clear imaging, that is, the astigmatism of the optical lens 100 is well compensated.

[0163] Please see Figure 2 (C) in the middle, Figure 2 (C) in the figure is a distortion curve of the optical lens 100 in the first embodiment at a wavelength of 546 nm. The horizontal axis along the X-axis represents distortion, and the vertical axis along the Y-axis represents the field of view, in degrees (deg). Figure 2 As can be seen from (C), at this wavelength, the image distortion caused by the main beam is small, and the distortion of the optical lens 100 is well corrected.

[0164] Second Embodiment

[0165] The structural schematic diagram of the optical lens 100 disclosed in the second embodiment of this application is shown below. Figure 3 As shown, the optical lens 100 includes a first lens L1, a second lens L2, a third lens L3, an aperture stop STO, a fourth lens L4, a fifth lens L5, a sixth lens L6, a seventh lens L7, a filter IR, and a protective glass CG, arranged sequentially along the optical axis from the object side to the image side.

[0166] In the second embodiment, the refractive power design of the first lens L1 to the seventh lens L7 is the same as that of the first embodiment, except that the fifth lens L5 has positive refractive power and the sixth lens L6 has negative refractive power. Further details will not be provided here.

[0167] In this embodiment, the surface design of the first lens L1 to the seventh lens L7 is the same as that of the first embodiment, except that the object side and image side of the fifth lens L5 are convex near the optical axis, the object side and image side of the sixth lens L6 are concave near the optical axis, and the image side of the seventh lens L7 is convex near the optical axis.

[0168] Other parameters of the optical lens 100 are given in Table 3 below. The definitions of each parameter can be derived from the description of the foregoing embodiments, and will not be repeated here.

[0169] Table 3

[0170]

[0171] In the second embodiment, Table 4 provides the higher-order coefficients that can be used for each aspherical mirror in the second embodiment, wherein each aspherical surface shape can be defined by the formula given in the first embodiment.

[0172] Table 4

[0173]

[0174]

[0175] Please see Figure 4 , Figure 4 Figure (A) shows the spherical aberration curves of the optical lens 100 in the first embodiment at wavelengths of 656 nm, 588 nm, 546 nm, 486 nm, 436 nm, and 410 nm. The horizontal axis along the X-axis represents the focus shift in mm, and the vertical axis along the Y-axis represents the normalized field of view. Figure 4 As can be seen from (A) in the first embodiment, the spherical aberration value of the optical lens 100 is better, indicating that the imaging quality of the optical lens 100 in this embodiment is better.

[0176] Please see Figure 4 (B) in the middle Figure 4(B) in the figure shows the light astigmatism diagram of the optical lens 100 in the first embodiment at a wavelength of 546 nm. The horizontal axis along the X-axis represents the focus shift in mm, and the vertical axis along the Y-axis represents astigmatism in mm. In the astigmatism curve, T represents the curvature of the imaging plane IMG in the meridional direction, and S represents the curvature of the imaging plane IMG in the sagittal direction. Figure 4 As can be seen from (B) in the figure, at this wavelength, the field curvature of the optical lens 100 is small, and the field curvature and astigmatism of each field of view are well corrected. The center and edge of the field of view have clear imaging, that is, the astigmatism of the optical lens 100 is well compensated.

[0177] Please see Figure 4 (C) in the middle, Figure 4 (C) in the figure is a distortion curve of the optical lens 100 in the first embodiment at a wavelength of 546 nm. The horizontal axis along the X-axis represents distortion, and the vertical axis along the Y-axis represents astigmatism, with units of mm. Figure 4 As can be seen from (C), at this wavelength, the image distortion caused by the main beam is small, and the distortion of the optical lens 100 is well corrected.

[0178] Third Embodiment

[0179] The structural schematic diagram of the optical lens 100 disclosed in the third embodiment of this application is shown below. Figure 5 As shown, the optical lens 100 includes a first lens L1, a second lens L2, a third lens L3, an aperture stop STO, a fourth lens L4, a fifth lens L5, a sixth lens L6, a seventh lens L7, a filter IR, and a protective glass CG, arranged sequentially along the optical axis from the object side to the image side.

[0180] In this embodiment, the refractive power design of the first lens L1 to the seventh lens L7 is consistent with that of the second embodiment.

[0181] The surface design of the first lens L1 to the seventh lens L7 is the same as that of the second embodiment, and will not be described again here.

[0182] Other parameters of the optical lens 100 are given in Table 5 below. The definitions of each parameter can be derived from the description of the foregoing embodiments, and will not be repeated here.

[0183] Table 5

[0184]

[0185]

[0186] In the third embodiment, Table 6 provides the higher-order coefficients that can be used for each aspherical mirror in the third embodiment, wherein each aspherical surface shape can be defined by the formula given in the first embodiment.

[0187] Table 6

[0188]

[0189] Please see Figure 6 ,Depend on Figure 6 As can be seen from (A) the spherical aberration curve, (B) the ray astigmatism curve, and (C) the distortion curve, the spherical aberration, astigmatism, and distortion of the optical lens 100 are all well controlled, thus the optical lens 100 of this embodiment has good imaging quality. Furthermore, regarding... Figure 6 (A) Figure 6 (B) and Figure 6 The wavelengths corresponding to the curves in (C) can be referred to in the first embodiment regarding... Figure 2 (A) Figure 2 (B) Figure 2 The content described in (C) will not be repeated here.

[0190] Fourth embodiment

[0191] The structural schematic diagram of the optical lens 100 disclosed in the fourth embodiment of this application is shown below. Figure 7 As shown, the optical lens 100 includes a first lens L1, a second lens L2, a third lens L3, an aperture stop STO, a fourth lens L4, a fifth lens L5, a sixth lens L6, a seventh lens L7, a filter IR, and a protective glass CG, arranged sequentially along the optical axis from the object side to the image side.

[0192] In this embodiment, the refractive power design of the first lens L1 to the seventh lens L7 is consistent with that of the second embodiment. Regarding the surface design of the first lens L1 to the seventh lens L7, except that the image-side surface of the seventh lens L7 is concave near the optical axis, the others are consistent with the second embodiment and will not be described again here.

[0193] Other parameters of the optical lens 100 are given in Table 7 below. The definitions of each parameter can be derived from the description of the foregoing embodiments, and will not be repeated here.

[0194] Table 7

[0195]

[0196]

[0197] In the fourth embodiment, Table 8 provides the higher-order coefficients that can be used for each aspherical mirror in the fourth embodiment, wherein each aspherical surface shape can be defined by the formula given in the first embodiment.

[0198] Table 8

[0199]

[0200] Please see Figure 8 ,Depend on Figure 8 As can be seen from (A) the spherical aberration curve, (B) the ray astigmatism curve, and (C) the distortion curve, the spherical aberration, astigmatism, and distortion of the optical lens 100 are all well controlled, thus the optical lens 100 of this embodiment has good imaging quality. Furthermore, regarding... Figure 8 (A) Figure 8 (B) and Figure 8 The wavelengths corresponding to the curves in (C) can be referred to in the first embodiment regarding... Figure 2 (A) Figure 2 (B) Figure 2 The content described in (C) will not be repeated here.

[0201] Fifth Embodiment

[0202] Please see Figure 9 The optical lens 100 includes a first lens L1, a second lens L2, a third lens L3, an aperture stop STO, a fourth lens L4, a fifth lens L5, a sixth lens L6, a seventh lens L7, a filter IR, and a protective glass CG, arranged sequentially along the optical axis from the object side to the image side.

[0203] In this embodiment, the refractive power design of the first lens L1 to the seventh lens L7 is the same as that of the first embodiment, except that the refractive power of the sixth lens L6 is negative. It will not be described again here.

[0204] In this embodiment, the surface design of the first lens L1 to the seventh lens L7 is the same as that of the first embodiment, and will not be described again here.

[0205] The structural schematic diagram of the optical lens 100 disclosed in the fifth embodiment of this application is shown below. Figure 9 As shown, other parameters of the optical lens 100 are given in Table 9 below. The definitions of each parameter can be derived from the description of the foregoing embodiments, and will not be repeated here.

[0206] Table 9

[0207]

[0208] In the fifth embodiment, Table 10 provides the higher-order coefficients that can be used for various aspherical mirrors in the fifth embodiment, wherein each aspherical surface shape can be defined by the formula given in the first embodiment.

[0209] Table 10

[0210]

[0211] Please see Figure 10 ,Depend on Figure 10 As can be seen from (A) the spherical aberration curve, (B) the ray astigmatism curve, and (C) the distortion curve, the spherical aberration, astigmatism, and distortion of the optical lens 100 are all well controlled, thus the optical lens 100 of this embodiment has good imaging quality. Furthermore, regarding... Figure 10 (A) Figure 10 (B) and Figure 10 The wavelengths corresponding to the curves in (C) can be referred to in the first embodiment regarding... Figure 2 (A) Figure 2 (B) Figure 2 The content described in (C) will not be repeated here.

[0212] Sixth Embodiment

[0213] Please see Figure 11 The optical lens 100 includes a first lens L1, a second lens L2, a third lens L3, an aperture stop STO, a fourth lens L4, a fifth lens L5, a sixth lens L6, a seventh lens L7, a filter IR, and a protective glass CG, arranged sequentially along the optical axis from the object side to the image side.

[0214] In this embodiment, the refractive power design of the first lens L1 to the seventh lens L7 is the same as that of the second embodiment, and will not be repeated here.

[0215] In this embodiment, the surface design of the first lens L1 to the seventh lens L7 is the same as that in the second embodiment, and will not be repeated here.

[0216] The structural schematic diagram of the optical lens 100 disclosed in the sixth embodiment of this application is shown below. Figure 11 As shown, other parameters of the optical lens 100 are given in Table 11 below. The definitions of each parameter can be derived from the description of the foregoing embodiments, and will not be repeated here.

[0217] Table 11

[0218]

[0219] In the sixth embodiment, Table 12 gives the higher-order coefficients that can be used for each aspherical mirror in the sixth embodiment, wherein each aspherical surface shape can be defined by the formula given in the first embodiment.

[0220] Table 12

[0221]

[0222]

[0223] Please see Figure 12 ,Depend on Figure 12 As can be seen from (A) the spherical aberration curve, (B) the ray astigmatism curve, and (C) the distortion curve, the spherical aberration, astigmatism, and distortion of the optical lens 100 are all well controlled, thus the optical lens 100 of this embodiment has good imaging quality. Furthermore, regarding... Figure 12 (A) Figure 12 (B) and Figure 12 The wavelengths corresponding to the curves in (C) can be referred to in the first embodiment regarding... Figure 2 (A) Figure 2 (B) Figure 2 The content described in (C) will not be repeated here.

[0224] Please refer to Table 13, which summarizes the ratios of the relationships in the first to sixth embodiments of this application.

[0225] Table 13

[0226]

[0227]

[0228] Please see Figure 13 This application also discloses a camera module 200, which includes an image sensor 201 and an optical lens 100 as described in any of the first to fifth embodiments above. The image sensor 201 is disposed on the image side of the optical lens 100. The photosensitive surface of the image sensor 201 is located on the imaging surface (IMG) of the optical lens 100, and light rays from an object passing through the lens and incident on the photosensitive surface can be converted into electrical signals for an image. The image sensor 201 can be a complementary metal-oxide semiconductor (CMOS) or a charge-coupled device (CCD). The camera module 200 can be an imaging module integrated on a terminal device 300 or a stand-alone lens. It is understood that the camera module 200 with the aforementioned optical lens 100 has all the technical effects of the aforementioned optical lens 100, that is, the camera module 200 can meet the design requirements of high-pixel imaging while satisfying the miniaturization design of the optical lens 100. Since the above-mentioned technical effects have been described in detail in the embodiments of optical lens 100, they will not be repeated here.

[0229] This application also discloses a terminal device 300, which includes a housing 301 and the aforementioned camera module 200, with the camera module 200 disposed within the housing 301. The terminal device 300 may include, but is not limited to, mobile phones, tablets, laptops, smartwatches, in-vehicle devices, drones, and surveillance cameras. Please refer to [link / reference]. Figure 14 Taking the terminal device 300 as a mobile phone as an example, the camera module 200 can be set in the housing 301.

[0230] Please see Figure 15 The terminal device 300 can also be a vehicle. In this case, the housing 301 can be a vehicle body, and the camera module 200 can be installed on the vehicle body, for example, inside or outside the vehicle body.

[0231] It is understood that the terminal device 300 with the aforementioned camera module 200 also possesses all the technical effects of the aforementioned optical lens 100. That is, the terminal device 300 can meet the design requirements of high-pixel imaging while satisfying the miniaturization design of the optical lens 100. Since the aforementioned technical effects have been described in detail in the embodiments of the optical lens 100, they will not be repeated here.

[0232] The optical lens, camera module, and terminal device disclosed in the embodiments of this application have been described in detail above. Specific examples have been used to illustrate the principles and implementation methods of this application. The description of the above embodiments is only for the purpose of helping to understand the optical lens, camera module, and terminal device of this application and their core ideas. At the same time, for those skilled in the art, there will be changes in the specific implementation methods and application scope based on the ideas of this application. Therefore, the content of this specification should not be construed as a limitation of this application.

Claims

1. An optical lens, characterized in that, There are a total of seven lenses with refractive power, including a first lens, a second lens, a third lens, a fourth lens, a fifth lens, a sixth lens, and a seventh lens arranged in sequence from the object side to the image side along the optical axis; The first lens has negative refractive power. The object side surface of the first lens is convex near the optical axis, and the image side surface of the first lens is concave near the optical axis; The second lens has negative refractive power. The object side surface of the second lens is concave near the optical axis, and the image side surface of the second lens is convex near the optical axis; The third lens has positive refractive power. Both the object side surface and the image side surface of the third lens are convex near the optical axis; The fourth lens has positive refractive power. Both the object side surface and the image side surface of the fourth lens are convex near the optical axis; The fifth lens has refractive power; The sixth lens has refractive power; The seventh lens has positive refractive power. The object side surface of the seventh lens is convex near the optical axis; The optical lens satisfies the following relational expressions: 140deg ≤ FOV ≤ 151deg, 6.4 < TTL / IMGH < 7, and 1 < SAGs1 / CT1 < 1.25; Where, FOV is the maximum field angle of the optical lens, TTL is the distance on the optical axis from the object side surface of the first lens to the imaging surface of the optical lens, IMGH is half of the image height corresponding to the maximum field angle of the optical lens, SAGs1 is the distance in the optical axis direction from the intersection point of the object side surface of the first lens and the optical axis to the maximum effective semi-aperture of the object side surface of the first lens, and CT1 is the thickness of the first lens on the optical axis.

2. The optical lens according to claim 1, characterized in that, The optical lens satisfies the following relational expressions: 7.5 < TTL / F < 8, and / or, 1.6 < TTL / ΣCT < 2, and / or, 5 < TTL / CTMAX < 7; Where, F is the focal length of the optical lens, ΣCT is the sum of the thicknesses of all lenses from the first lens to the seventh lens on the optical axis, and CTMAX is the maximum thickness on the optical axis among the first lens to the seventh lens.

3. The optical lens according to claim 1, characterized in that, The fifth lens and the sixth lens form a cemented lens. The optical lens satisfies the following relational expressions: -5 < F56 / F < -2, and / or, 2.5 < F3 / F < 3.5, and / or, |F567 / F| > 5; Where, F56 is the combined focal length of the fifth lens and the sixth lens, F3 is the focal length of the third lens, F567 is the combined focal length of the fifth lens, the sixth lens, and the seventh lens, and F is the focal length of the optical lens.

4. The optical lens according to claim 1, characterized in that, The optical lens satisfies the following relational expressions: -10 < F1 / CT1 < -5, and / or, 2 < F4 / CT4 < 6, and / or, 0.9 < BFL / F < 1.2, and / or, 1 < (CT5 + CT6 + CT7) / F < 1.5; Where, F1 is the focal length of the first lens, F4 is the focal length of the fourth lens, F is the focal length of the optical lens, BFL is the distance from the image side of the seventh lens to the imaging surface of the optical lens on the optical axis, CT4 is the thickness of the fourth lens on the optical axis, CT5 is the thickness of the fifth lens on the optical axis, CT6 is the thickness of the sixth lens on the optical axis, and CT7 is the thickness of the seventh lens on the optical axis.

5. The optical lens according to claim 1, characterized in that, The optical lens satisfies the following relationships: 5.5 < SD1 / SAGs1 < 7, and / or, 1.0 < SD3 / SD14 < 1.2, and / or, 0.8 < SD9 / SD7 < 1.1; Where, SD1 is the maximum effective semi-aperture of the object side of the first lens, SD3 is the maximum effective semi-aperture of the object side of the second lens, SD14 is the maximum effective semi-aperture of the image side of the seventh lens, SD9 is the maximum effective semi-aperture of the object side of the fifth lens, and SD7 is the maximum effective semi-aperture of the object side of the fourth lens.

6. The optical lens according to claim 1, characterized in that, The optical lens satisfies the following relationships: 4.5 < R1 / R2 < 5, and / or, |R13 / R14| < 1.2, and / or, 3 < (R5 - R6) / (R5 + R6) < 25; Where, R1 is the radius of curvature of the object side of the first lens at the optical axis, R2 is the radius of curvature of the image side of the first lens at the optical axis, R13 is the radius of curvature of the object side of the seventh lens at the optical axis, R14 is the radius of curvature of the image side of the seventh lens at the optical axis, R5 is the radius of curvature of the object side of the third lens at the optical axis, and R6 is the radius of curvature of the image side of the third lens at the optical axis.

7. The optical lens according to claim 1, characterized in that, The optical lens satisfies the following relationships: 2.5 < ET1 / CT1 < 3, and / or, 1.3 < CT4 / ET4 < 1.5, and / or, 1.5 < CT7 / ET7 < 2.5, and / or, 0.5 < CT3 / CT2 < 1.5; Where, ET1 is the distance in the direction parallel to the optical axis from the maximum effective semi-aperture of the object side of the first lens to the maximum effective semi-aperture of the image side of the first lens, ET4 is the distance in the direction parallel to the optical axis from the maximum effective semi-aperture of the object side of the fourth lens to the maximum effective semi-aperture of the image side of the fourth lens, CT4 is the thickness of the fourth lens on the optical axis, ET7 is the distance in the direction parallel to the optical axis from the maximum effective semi-aperture of the object side of the seventh lens to the maximum effective semi-aperture of the image side of the seventh lens, CT7 is the thickness of the seventh lens on the optical axis, CT3 is the thickness of the third lens on the optical axis, and CT2 is the thickness of the second lens on the optical axis.

8. The optical lens according to claim 1, characterized in that, The optical lens satisfies the following relationships: 85deg < FOV / FNO < 95deg, and / or, 0.8 < F3 / F4 < 1.1, and / or, 2 < F*tan(FOV / 2) / IMGH < 3.5; Wherein, FNO is the aperture number of the optical lens, F3 is the focal length of the third lens, F4 is the focal length of the fourth lens, and tan(FOV / 2) is the tangent of half the maximum field of view of the optical lens.

9. A camera module, characterized in that, The camera module includes an image sensor and an optical lens as described in any one of claims 1-8, wherein the image sensor is disposed on the image side of the optical lens.

10. A terminal device, characterized in that, It includes a housing and a camera module as described in claim 9, wherein the camera module is disposed on the housing.

Images