Optical lens, camera module and terminal equipment

Abstract

The invention discloses an optical lens, a camera module and terminal equipment, the optical lens comprises seven lenses with refractive power, the first lens has negative refractive power, the object side surface of the first lens is a convex surface, and the image side surface of the first lens is a concave surface; the second lens element with negative refractive power has a concave object-side surface and a convex image-side surface. The third lens element with positive refractive power has a convex object-side surface and a convex image-side surface. The fourth lens element with positive refractive power has a convex object-side surface and a convex image-side surface. A fifth lens element with refractive power; the sixth lens has refractive power, the seventh lens has positive refractive power, and the object side surface of the seventh lens is a convex surface; the optical lens satisfies the following relational expressions: FOV is greater than or equal to 140deg and less than or equal to 151deg, 6.4 lt; tTL / IMGHlt; 7 and 1lt; sAGs1 / CT1lt; and 1.25. According to the optical lens, the camera module and the terminal equipment, high-pixel imaging can be taken into account while the miniaturization design of the optical lens is met.

Description

Technical Field

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

[0002] With the development of the automotive industry, the country's requirements for road traffic safety and automobile safety are constantly increasing. The application of ADAS (Advanced Driving Assistance System), DMS (Driver Monitor System), and CMS (Camera Monitor System) in vehicle driving is gradually being promoted. In the context of the rise of smart cockpits, the requirements for vehicle cameras are gradually increasing. However, under the design trend of miniaturization, the current vehicle cameras have low resolution and small depth of field, and cannot simultaneously meet the presentation of long-distance details and clear imaging in a wide angle range. Summary of the invention

[0003] The present application provides an optical lens, a camera module and a terminal device, which can achieve high-pixel imaging while satisfying the miniaturization design of the optical lens.

[0004] In order to achieve the above-mentioned purpose, in a first aspect, an embodiment of the present application discloses 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 in sequence from the object side to the image side along the optical axis;

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

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

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

[0008] The fourth lens has positive refractive power, and the object side surface and the image side surface of the fourth lens are both convex surfaces 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 surface of the seventh lens is convex at the near 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] Wherein, FOV is the maximum field of view angle of the optical lens, TTL is the distance from the object side surface 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 of view angle of the optical lens, SAGs1 is the distance in the optical axis direction from the maximum effective semi-aperture of the object side surface of the first lens to the intersection point of the object side surface 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 the present application, in order to meet the requirements of miniaturization design of the optical lens while taking into account high imaging quality, by reasonably configuring the refractive power and surface shape of the seven lenses, that is, setting the first lens to have negative refractive power, and cooperating with the design that its object side surface and image side surface are convex and concave respectively near the optical axis, it is beneficial to collect more light into the optical lens and realize the wide-angle of the optical lens; the second lens has negative refractive power, and cooperating with the design that its object side surface and image side surface are concave and convex respectively near the optical axis, it is beneficial for the 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, and improve the imaging quality; the third lens has positive refractive power, and cooperating with the design that its object side surface and image side surface are convex near the optical axis, it is beneficial to correct the field curvature of the optical lens; the fourth lens has positive refractive power, and cooperating with the object side surface and image side surface 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 refractive power, the sixth lens has refractive power, which is beneficial to correct the aberration of the optical lens and improve the imaging quality, and at the same time, the refractive power of the fifth lens and the sixth lens can be reasonably distributed. The seventh lens has positive refractive power, and cooperating with the design that the object side surface 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.

[0016] Meanwhile, 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, thereby realizing the miniaturization design of the optical lens.

[0017] In addition, by limiting the optical lens to satisfy the relational expression 140deg ≤ FOV ≤ 151deg, the optical lens has a large field of view angle and can realize wide-angle imaging.

[0018] 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 facilitating the improvement of the imaging clarity of the optical lens and further improving the 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] Wherein, 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 first lens to the seventh lens on the optical axis.

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

[0023] When the optical lens satisfies the relationship 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 relationship 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 relationships: -5 < F56 / F < -2, and / or, 2.5 < F3 / F < 3.5, and / or, |F567 / F| > 5;

[0026] Wherein, 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.

[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 better light converging ability for the optical lens, while being able to correct the distortion of the optical lens and reduce the aberration generated by the optical lens, and 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 optical total 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 of view. When lower than the lower limit of the relational expression, the focal length of the optical lens is too large, and the total 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 better light converging ability for the optical lens, while being able to correct the distortion of the optical lens and reduce the aberration generated by the optical lens, and 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 that the incident angle of light in the optical lens can be effectively controlled, the sensitivity of the optical lens can be reduced, which is beneficial to correcting the aberration generated by the optical lens, and further 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 can pass through the fourth lens more gently, 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 concentrated, 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 embodiment 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 a 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 of view angle range of the optical lens, and further facilitating the large field of view 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 restricting the light path of the optical lens, avoiding a large step structure between the second lens and the seventh lens, reducing the deflection angle of the light, avoiding introducing excessive aberration, improving the imaging quality, and improving the assembly stability of the optical lens 100.

[0041] When the lens satisfies the relation 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 beneficial to the transmission of light between the fourth lens and the fifth lens, and further beneficial 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 relations:

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

[0044] Wherein, 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 relation 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 beneficial 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 relation |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 beneficial 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 relation 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 beneficial 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] Among them, 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] Among them, 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 of view 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, so that wide-angle imaging can be realized and the light input of the optical lens can be increased, so that the optical lens can also be applied to scenes at night or with low ambient brightness.

[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, which is convenient for light focusing and is also beneficial 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, the miniaturization of the optical lens can be realized, and at the same time, the optical lens can realize 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 miniaturized design of the optical lens while taking into account high imaging quality, the refractive powers and surface shapes of the 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 realize the wide-angle 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 the light to enter the optical lens gently, so as 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 with the design that its object side and image side are both 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 design that the object side and image side of the fourth lens are both 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 powers 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, thus 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 field of view angle and can realize wide-angle imaging.

[0065] Moreover, the optical lens satisfies 6.4<TTL / IMGH<7, which can realize both the miniaturized design of the optical lens and large image plane imaging, thus 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, so as to control the overall thickness of the first lens on the optical axis and make 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 in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained according to these drawings.

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

[0069] Figure 2 is a spherical aberration diagram, an astigmatism curve diagram, and a distortion curve diagram of the optical lens disclosed in the first embodiment of the present application;

[0070] Figure 3 is a schematic structural diagram of an optical lens disclosed in the second embodiment of the present application;

[0071] Figure 4 is a spherical aberration diagram, an astigmatism curve diagram, and a distortion curve diagram of the optical lens disclosed in the second embodiment of the present application;

[0072] Figure 5 is a schematic structural diagram of an optical lens disclosed in the third embodiment of the present application;

[0073] Figure 6 is a spherical aberration diagram, an astigmatism curve diagram, and a distortion curve diagram of the optical lens disclosed in the third embodiment of the present application;

[0074] Figure 7 is a schematic structural diagram of an optical lens disclosed in a fourth embodiment of the present application;

[0075] Figure 8 is a spherical aberration diagram, an astigmatism curve diagram, and a distortion curve diagram of the optical lens disclosed in the fourth embodiment of the present application;

[0076] Fig. 9 is a schematic structural diagram of an optical lens disclosed in a fifth embodiment of the present application;

[0077] Fig.10 is a spherical aberration diagram, an astigmatism curve diagram, and a distortion curve diagram of the optical lens disclosed in the fifth embodiment of the present application;

[0078] Fig.11 is a schematic structural diagram of an optical lens disclosed in a sixth embodiment of the present application;

[0079] Fig.12 is a spherical aberration diagram, an astigmatism curve diagram, and a distortion curve diagram of the optical lens disclosed in the sixth embodiment of the present application;

[0080] Fig.13 It is a structural schematic diagram of the camera module disclosed in this application;

[0081] Fig.14 It is a structural schematic diagram when the terminal device disclosed in this application is a mobile phone;

[0082] Fig.15 It is a schematic diagram of the structure when the terminal device disclosed in the present application is a car. DETAILED DESCRIPTION

[0083] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0084] In the present invention, the directions or positional relationships indicated by the terms "inside" and "outside" are based on the directions or positional relationships shown in the drawings. These terms are mainly used to better describe the present invention and its embodiments, and are not used to limit the indicated devices, elements or components to have a specific direction, or to be constructed and operated in a specific direction.

[0085] In addition, some of the above terms may be used to express other meanings in addition to indicating orientation or positional relationship. For example, the term "on" may also be used to express a certain dependency or connection relationship in some cases. For those skilled in the art, the specific meanings of these terms in the present invention can be understood according to specific circumstances.

[0086] In addition, the terms "disposed" and "set at" should be understood in a broad sense. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0087] In addition, the terms "first", "second", etc. are mainly used to distinguish different devices, elements or components (the specific types and structures may be the same or different), and are not used to indicate or imply the relative importance and quantity of the indicated devices, elements or components. Unless otherwise specified, "plurality" means two or more.

[0088] The technical solution of the present application will be further described below in conjunction with embodiments and drawings.

[0089] See also Figure 1The present 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, which are arranged in sequence from the object side to the image side along the optical axis. Among them, the first lens L1 has a negative refractive power, the second lens L2 has a negative refractive power, the third lens L3 has a positive refractive power, the fourth lens L4 has a positive refractive power, the fifth lens L5 has a positive refractive power or a negative refractive power, the sixth lens L6 has a positive refractive power or a negative refractive power, and the seventh lens L7 has a positive refractive power. When imaging, light enters the first lens L1, the second lens L2, the third lens L3, the fourth lens L4, the fifth lens L5, the sixth lens L6 and the seventh lens L7 in sequence from the object side of the first lens L1, and finally forms an image on the imaging surface IMG of the optical lens 100.

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

[0091] Optionally, all of the seven lenses may be plastic lenses, so that the optical lens 100 is relatively light and convenient for processing complex surfaces. Alternatively, all of the seven lenses may be glass lenses, or some of the lenses may be plastic lenses and some of the lenses may be glass lenses.

[0092] For example, the second lens L1 and the seventh lens L7 may be plastic lenses, and the other lenses may be glass lenses. In this way, the optical lens 100 as a whole adopts a glass-plastic hybrid lens structure, which can reduce the processing 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 may all be spherical lenses, while the second lens L2 and the seventh lens L7 may be aspherical lenses. In this way, the combination of spherical lenses and aspherical lenses can improve high-order aberrations and thus improve imaging quality. Of course, in other embodiments, the first lens L1 to the seventh lens L7 may all be spherical lenses, or the first lens L1 to the seventh lens L7 may all be aspherical lenses. The specific adjustment can be made according to the actual imaging requirements, and this embodiment does not specifically limit this.

[0094] In some embodiments, the optical lens 100 may further include an aperture STO, which is disposed between the third lens L3 and the fourth lens L4, and a central aperture STO is adopted, which is beneficial to the aberration correction of the optical lens 100. Of course, as other examples, the aperture STO may also be disposed between other lenses, for example, between the second lens L2 and the third lens L3, or between the first lens L1 and the second lens L2, and may be disposed specifically according to actual needs, and this embodiment does not specifically limit this.

[0095] In some embodiments, the optical lens 100 further includes a filter IR, and the filter IR 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 filter IR can be an infrared cut-off filter, so that light of other bands such as infrared light can be filtered out, and only visible light can be allowed to pass through, so that the imaging is more in line with the visual experience of the human eye. Of course, the filter IR can also be an infrared bandpass filter, so that light of other bands such as visible light can be filtered out, and only infrared light can be allowed to pass through, and the imaging quality can be improved by filtering light of other bands such as visible light; and the optical lens 100 can be used as an infrared optical lens, that is, the optical lens 100 can also be imaged in dim environments and other special application scenarios and can obtain better imaging effects. Preferably, the filter IR can be made of glass. Of course, in other embodiments, the filter IR can also be made of optical glass coating, or a filter IR of other materials, which can be selected according to actual needs and is not specifically limited in this embodiment.

[0096] In some embodiments, the optical lens 100 further includes a protective glass CG, which is disposed between the filter IR and the imaging surface IMG, so that the protective glass CG 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 the relationship, the optical lens has a large field of view, thereby achieving wide-angle imaging.

[0098] In some embodiments, the optical lens 100 satisfies the relation FNO < 1.65, where FNO is the f-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 scenes 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 realize 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 of view 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-plane 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 of view angle of the optical lens 100, so that when the optical lens 100 realizes a miniaturized design, it can also have the characteristic of a large image plane, 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 of view angle of the optical lens 100. When the optical lens 100 satisfies 2 < F*tan(FOV / 2) / IMGH < 3.5, it can realize the miniaturization of the optical lens 100 while also enabling the optical lens 100 to achieve a wide-angle large-image-plane 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 of view angle range of the optical lens 100, and further facilitating the realization of large field of view 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 of view angle and the f-number of the optical lens 100, so that the optical lens 100 has the characteristics of wide angle and large aperture, and thus can achieve wide angle imaging and improve the light input amount of the optical lens 100, making the optical lens 100 also applicable to night or scenes 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 recognition 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 of the first lens L1 can be achieved, 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, improves the overall resolution of the optical lens 100, and strengthens 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 and strengthen 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 enabling the optical lens 100 to have better light convergence ability. 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 enabling the optical lens 100 to have better light convergence ability. 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.

[0111] 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, so that the fourth lens L4 can provide a positive refractive power to the optical lens 100, thereby enabling the optical lens 100 to have a better light converging ability, and at the same time 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 enabling the optical lens 100 to have a better light converging ability, and at the same time 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 deflection is large, and it is easy to increase the aberration of the off-axis field of view. 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 surface 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 relational expression 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 relational expression 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, correcting the distortion of the optical lens 100 and reducing 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 relational expression |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 relational expression 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, thereby providing the optical lens 100 with better light converging ability, correcting the distortion of the optical lens 100 and reducing the aberration generated by the optical lens, and improving the imaging quality of the optical lens 100. Optionally, this relational expression 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 relational expression 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 relational expression 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, thereby providing 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 relational expression -10 < F1 / CT1 < -5, where CT1 is the thickness of the first lens L1 on the optical axis. When this relational expression 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, the sensitivity of the optical lens 100 can be reduced, which is beneficial to correcting the aberration generated by the optical lens 100, and further 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, which is beneficial to correcting 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, which is beneficial to correcting 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, which is beneficial to correcting 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, which is beneficial to correcting 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, which is beneficial to correcting 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, facilitating the correction of aberrations generated by the optical lens 100, and thus facilitating the improvement of 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, facilitating the reduction of the sensitivity of the optical lens 100, facilitating the correction of aberrations generated by the optical lens 100, and thus facilitating the improvement of 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 facilitating the control of 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 facilitating the control of 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 facilitating the control of 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 curvature radius of the image side S8 of the fourth lens L4 at the near optical axis, and R7 is the curvature radius of the object side S7 of the fourth lens L4 at the near optical axis. When this relation is satisfied, the curvature radii 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 curvature radius of the image side S10 of the fifth lens L5 at the near optical axis, and R9 is the curvature radius of the object side S9 of the fifth lens L5 at the near optical axis. When this relation is satisfied, the curvature radii 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 curvature radius of the image side S12 of the sixth lens L6 at the near optical axis, and R11 is the curvature radius of the object side S11 of the sixth lens L6 at the near optical axis. When this relation is satisfied, the curvature radii 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 curvature radius of the image side S14 of the seventh lens L7 at the near optical axis, and R13 is the curvature radius of the object side S13 of the seventh lens L7 at the near optical axis. When this relation is satisfied, the curvature radii 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 miniaturization 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 surface S7 of the fourth lens L4 to the maximum effective semi-aperture of the image side surface S8 of the fourth lens L4 (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 surface S11 of the sixth lens L6 to the maximum effective semi-aperture of the image side surface 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 surface S13 of the seventh lens L7 to the maximum effective semi-aperture of the image side surface 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 more gentle between the fifth lens L5 and the fourth lens L4, 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. Wherein, 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. Wherein, EDS is the aperture of the diaphragm STO of the optical lens 100, and tan(FOV) is the tangent value of the maximum field of view angle of the optical lens. By reasonably matching the relationship between the maximum field of view angle of the optical lens 100, the aperture of the diaphragm STO, and the focal length of the optical lens 100, it can be ensured that the optical lens 100 has sufficient image plane brightness and small distortion within the wide-angle imaging range, ensuring that the optical lens 100 has high imaging quality characteristics and can well capture the details of the object to be photographed.

[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. Wherein, 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, so as to avoid the situation of delamination caused by too large a difference in thermal expansion coefficients between the two.

[0146] It can be understood that the preset temperature can be -30°C to 70°C. Wherein, 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 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, which are arranged in sequence from the object side to the image side along the optical axis.

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

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

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

[0154]

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

[0156] Table 1

[0157]

[0158]

[0159] Table 2

[0160]

[0161] See also Figure 2 In (A), Figure 2 (A) is a spherical aberration curve of the optical lens 100 in the first embodiment at wavelengths of 656nm, 588nm, 546nm, 486nm, 436nm, and 410nm. The horizontal axis along the X-axis direction represents the focus offset in mm, and the vertical axis along the Y-axis direction represents the normalized field of view. Figure 2 It can be seen from (A) that the spherical aberration value of the optical lens 100 in the first embodiment is better, which means that the imaging quality of the optical lens 100 in this embodiment is better.

[0162] See also Figure 2 In (B), Figure 2 (B) is the astigmatism diagram of the optical lens 100 in the first embodiment at a wavelength of 546 nm. The horizontal axis along the X-axis direction represents the focus offset in mm, and the vertical axis along the Y-axis direction represents the field angle in degrees. T in the astigmatism curve represents the curvature of the imaging surface IMG in the meridian direction, and S represents the curvature of the imaging surface 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, the field curvature and astigmatism of each field of view are well corrected, and the center and edge of the field of view have clear images, that is, the astigmatism of the optical lens 100 is well compensated.

[0163] See also Figure 2 (C) in Figure 2 (C) 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 direction represents the distortion, and the vertical axis along the Y-axis direction represents the field of view, in degrees. Figure 2 As can be seen from (C) in FIG. 1 , at this wavelength, the image deformation caused by the main light 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 the present application is as follows Figure 3 As shown, the optical lens 100 includes a first lens L1, a second lens L2, a third lens L3, an aperture 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, which are arranged in sequence from the object side to the image side along the optical axis.

[0166] In the second embodiment, in the design of the refractive power of the first lens L1 to the seventh lens L7, except that the fifth lens L5 has a positive refractive power and the sixth lens L6 has a negative refractive power, the refractive power of other lenses is consistent with that of the first embodiment, which will not be described again.

[0167] In this embodiment, the surface designs of the first lens L1 to the seventh lens L7 are the same as those in the first embodiment, except that the object-side surface and the image-side surface of the fifth lens L5 are both convex at the near optical axis, the object-side surface and the image-side surface of the sixth lens L6 are both concave at the near optical axis, and the image-side surface of the seventh lens L7 is convex at the near optical axis. The surface designs of the object-side surface and the image-side surface of the other lenses at the near optical axis are also the same as those in the first embodiment, and are not repeated here.

[0168] Other parameters of the optical lens 100 are given in the following Table 3. The definition of each parameter can be obtained from the description of the above embodiments, and will not be repeated here.

[0169] Table 3

[0170]

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

[0172] Table 4

[0173]

[0174]

[0175] See also Figure 4 , Figure 4 (A) is a spherical aberration curve of the optical lens 100 in the first embodiment at wavelengths of 656nm, 588nm, 546nm, 486nm, 436nm, and 410nm. The horizontal axis along the X-axis direction represents the focus offset in mm, and the vertical axis along the Y-axis direction represents the normalized field of view. Figure 4 It can be seen from (A) that the spherical aberration value of the optical lens 100 in the first embodiment is better, which means that the imaging quality of the optical lens 100 in this embodiment is better.

[0176] See also Figure 4 In (B), Figure 4(B) is the astigmatism diagram of the optical lens 100 in the first embodiment at a wavelength of 546 nm. The horizontal axis along the X-axis direction represents the focus shift, in units of mm, and the vertical axis along the Y-axis direction represents the astigmatism, in units of mm. In the astigmatism curve, T represents the curvature of the imaging surface IMG in the meridian direction, and S represents the curvature of the imaging surface 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, the field curvature and astigmatism of each field of view are well corrected, and the center and edge of the field of view have clear images, that is, the astigmatism of the optical lens 100 is well compensated.

[0177] See also Figure 4 (C) in Figure 4 (C) 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 direction represents distortion, and the vertical axis along the Y-axis direction represents astigmatism, and the unit is mm. Figure 4 As can be seen from (C) in FIG. 1 , at this wavelength, the image deformation caused by the main light 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 the present application is as follows: Figure 5 As shown, the optical lens 100 includes a first lens L1, a second lens L2, a third lens L3, an aperture 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, which are arranged in sequence from the object side to the image side along the optical axis.

[0180] In this embodiment, the refractive power designs of the first lens L1 to the seventh lens L7 are consistent with those of the second embodiment.

[0181] The surface designs of the first lens L1 to the seventh lens L7 are consistent with those of the second embodiment and are not described again herein.

[0182] Other parameters of the optical lens 100 are given in the following Table 5. The definition of each parameter can be obtained from the description of the above embodiments, and will not be repeated here.

[0183] Table 5

[0184]

[0185]

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

[0187] Table 6

[0188]

[0189] See also Figure 6 ,Depend on Figure 6 It can be seen from the (A) spherical aberration curve, (B) light astigmatism diagram, and (C) distortion curve diagram in FIG. 1 that the spherical aberration, astigmatism, and distortion of the optical lens 100 are well controlled, so that the optical lens 100 of this embodiment has good imaging quality. 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. Figure 2 (A) Figure 2 (B) Figure 2 The contents 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 the present application is as follows: Figure 7 As shown, the optical lens 100 includes a first lens L1, a second lens L2, a third lens L3, an aperture 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, which are arranged in sequence from the object side to the image side along the optical axis.

[0192] In this embodiment, the refractive power designs of the first lens L1 to the seventh lens L7 are consistent with those of the second embodiment. In 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 at the near optical axis, the other are consistent with those of the second embodiment, which will not be repeated here.

[0193] Other parameters of the optical lens 100 are given in the following Table 7. The definition of each parameter can be obtained from the description of the above embodiments, and will not be repeated here.

[0194] Table 7

[0195]

[0196]

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

[0198] Table 8

[0199]

[0200] See also Figure 8 ,Depend on Figure 8 It can be seen from the (A) spherical aberration curve, (B) light astigmatism diagram, and (C) distortion curve diagram in FIG. 1 that the spherical aberration, astigmatism, and distortion of the optical lens 100 are well controlled, so that the optical lens 100 of this embodiment has good imaging quality. 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. Figure 2 (A) Figure 2 (B) Figure 2 The contents described in (C) will not be repeated here.

[0201] Fifth embodiment

[0202] See also Fig. 9 The optical lens 100 includes a first lens L1, a second lens L2, a third lens L3, an aperture 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, which are arranged in sequence from the object side to the image side along the optical axis.

[0203] In this embodiment, in the design of the refractive power of the first lens L1 to the seventh lens L7, except that the refractive power of the sixth lens L6 is negative, the refractive power of other lenses is consistent with that of the first embodiment, and will not be described again.

[0204] In this embodiment, the surface designs of the first lens L1 to the seventh lens L7 are consistent with those in the first embodiment, and are not described again herein.

[0205] The structural schematic diagram of the optical lens 100 disclosed in the fifth embodiment of the present application is as follows Fig. 9 As shown, other parameters of the optical lens 100 are given in the following Table 9. The definition of each parameter can be obtained from the description of the above embodiments, and will not be repeated here.

[0206] Table 9

[0207]

[0208] In the fifth embodiment, Table 10 gives the high-order coefficients that can be used for each aspherical mirror surface in the fifth embodiment, wherein each aspherical surface type can be defined by the formula given in the first embodiment.

[0209] Table 10

[0210]

[0211] See also Fig.10 ,Depend on Fig.10 It can be seen from the (A) spherical aberration curve, (B) light astigmatism diagram, and (C) distortion curve diagram in FIG. 1 that the spherical aberration, astigmatism, and distortion of the optical lens 100 are well controlled, so that the optical lens 100 of this embodiment has good imaging quality. Fig.10 (A) Fig.10 (B) and Fig.10 The wavelengths corresponding to the curves in (C) can be referred to in the first embodiment. Figure 2 (A) Figure 2 (B) Figure 2 The contents described in (C) will not be repeated here.

[0212] Sixth embodiment

[0213] See also Fig.11 The optical lens 100 includes a first lens L1, a second lens L2, a third lens L3, an aperture 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, which are arranged in sequence from the object side to the image side along the optical axis.

[0214] In this embodiment, the refractive power designs of the first lens L1 to the seventh lens L7 are consistent with those of the second embodiment, and are not described again herein.

[0215] In this embodiment, the surface designs of the first lens L1 to the seventh lens L7 are consistent with those of the second embodiment, and are not described again herein.

[0216] The structural schematic diagram of the optical lens 100 disclosed in the sixth embodiment of the present application is as follows Fig.11 As shown, other parameters of the optical lens 100 are given in the following Table 11. The definition of each parameter can be obtained from the description of the above embodiments, and will not be repeated here.

[0217] Table 11

[0218]

[0219] In the sixth embodiment, Table 12 gives the high-order coefficients that can be used for each aspherical mirror surface 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] See also Fig.12 ,Depend on Fig.12 It can be seen from the (A) spherical aberration curve, (B) light astigmatism diagram, and (C) distortion curve diagram in FIG. 1 that the spherical aberration, astigmatism, and distortion of the optical lens 100 are well controlled, so that the optical lens 100 of this embodiment has good imaging quality. Fig.12 (A) Fig.12 (B) and Fig.12 The wavelengths corresponding to the curves in (C) can be referred to in the first embodiment. Figure 2 (A) Figure 2 (B) Figure 2 The contents described in (C) will not be repeated here.

[0224] Please refer to Table 13, which is a summary of the ratios of various relationship equations in the first to sixth embodiments of the present application.

[0225] Table 13

[0226]

[0227]

[0228] See also Fig.13 The present application also discloses a camera module 200, which includes an image sensor 201 and an optical lens 100 as described in any one of the first to fifth embodiments, wherein the image sensor 201 is arranged 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 the light of the object incident on the photosensitive surface through the lens can be converted into an electrical signal of the 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 the terminal device 300, or it can be an independent lens. It can be understood that the camera module 200 with the above optical lens 100 has all the technical effects of the above optical lens 100, that is, the camera module 200 can meet the design requirements of high-pixel imaging while meeting the miniaturization design of the optical lens 100. Since the above technical effects have been described in detail in the embodiment of the optical lens 100, they will not be described again here.

[0229] The present application also discloses a terminal device 300, which includes a housing 301 and the camera module 200, wherein the camera module 200 is disposed in the housing 301. The terminal device 300 may include but is not limited to a mobile phone, a tablet computer, a laptop computer, a smart watch, a vehicle-mounted device, a drone, a monitor, etc. Fig.14 Taking the terminal device 300 as a mobile phone as an example, at this time, the camera module 200 can be set in the shell 301.

[0230] See also Fig.15 The terminal device 300 may also be a vehicle, in which case the housing 301 may be a vehicle body, and the camera module 200 may be disposed on the vehicle body, for example, inside the vehicle body or outside the vehicle body.

[0231] It can be understood that the terminal device 300 having the camera module 200 also has all the technical effects of the optical lens 100. That is, the terminal device 300 can meet the design requirements of high-pixel imaging while meeting the miniaturization design of the optical lens 100. Since the above technical effects have been described in detail in the embodiment 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 the present application are introduced in detail above. Specific examples are used in this article to illustrate the principles and implementation methods of the present application. The description of the above embodiments is only used to help understand the optical lens, camera module and terminal device of the present application and its core idea; at the same time, for general technical personnel in this field, according to the ideas of the present application, there will be changes in the specific implementation methods and application scope. In summary, the content of this specification should not be understood as a limitation on the present 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; Wherein, FOV is the maximum field of view 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 of view angle of the optical lens, SAGs1 is the distance in the optical axis direction from the maximum effective semi-aperture of the object side surface of the first lens to the intersection point of the object side surface of the first lens and the optical axis, 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; Wherein, F is the focal length of the optical lens, ΣCT is the sum of the thicknesses of all the 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; Wherein, 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; 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.

5. The optical lens according to claim 1, characterized in that: The optical lens satisfies the following relational expressions: 5.5 < SD1 / SAGs1 < 7, and / or, 1.0 < SD3 / SD14 < 1.2, and / or, 0.8 < SD9 / SD7 < 1.1; 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.

6. The optical lens according to claim 1, characterized in that: The optical lens satisfies the following relational expressions: 4.5 < R1 / R2 < 5, and / or, |R13 / R14| < 1.2, and / or, 3 < (R5 - R6) / (R5 + R6) < 25; Wherein, 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 relational expressions: 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; Wherein, 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 relational expressions: 85deg < FOV / FNO < 95deg, and / or, 0.8 < F3 / F4 < 1.1, and / or, 2 < F*tan(FOV / 2) / IMGH < 3.5; Among them, 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 value of half of the maximum field of view angle 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 to 8, and the image sensor is arranged on the image side of the optical lens.

10. A terminal device, characterized in that: It comprises a shell and a camera module as claimed in claim 9, wherein the camera module is arranged in the shell.

Images