Optical lens, camera module and terminal device

Abstract

The application discloses an optical lens, a camera module and a terminal device. The optical lens comprises seven lenses. The first lens has negative refractive power, and the object side surface and the image side surface thereof are respectively convex and concave near the optical axis. The second lens has negative refractive power, and the object side surface and the image side surface thereof are respectively concave and convex near the optical axis. The third lens has positive refractive power, and the object side surface and the image side surface thereof are respectively convex and concave near the optical axis. The fourth lens has positive refractive power, and the object side surface and the image side surface thereof are both convex near the optical axis. The fifth lens has positive refractive power, and the object side surface and the image side surface thereof are both convex near the optical axis. The sixth lens has negative refractive power, and the object side surface and the image side surface thereof are both concave near the optical axis. The seventh lens has positive refractive power, and the object side surface thereof is convex near the optical axis. The optical lens satisfies the following relationship: 130°<=FOV<=140° and 1.6<=FNO<=1.7.

Description

Technical Field

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

[0002] With the continuous development of the automotive industry and the increasing demands for driving safety and assisted driving, traditional optical observation methods are no longer sufficient. In complex traffic environments, drivers need a clearer and wider field of vision to deal with potential dangers. Based on this, Advanced Driving Assistance Systems (ADAS) have emerged, using various lenses and sensors to collect environmental information to ensure driver safety. To meet the performance requirements of ADAS, high-performance automotive lenses are essential. High-performance automotive lenses can accurately capture image information of the vehicle's surroundings, clearly presenting both close-up road details and distant obstacles, providing crucial support for driving safety and the effective operation of autonomous driving systems.

[0003] However, traditional automotive lenses have limitations in terms of field of view and resolution, failing to meet the requirements for large-scene monitoring in today's complex traffic environments. Furthermore, a narrow field of view can lead to blind spots, posing a potential threat to driving safety. Therefore, the market currently needs a high-definition optical lens with a wide field of view to meet the needs of automotive applications. Summary of the Invention

[0004] This application discloses an optical lens, a camera module, and a terminal device that can meet the requirements of a large field of view, high relative illumination, and miniaturized design.

[0005] To achieve the above objectives, in a first aspect, this 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 sequentially along the optical axis from the object side to the image side.

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

[0007] The second lens has negative refractive power, the object side of the second lens is concave near the optical axis, and the image side of the second lens is convex near the optical axis;

[0008] The third lens has positive refractive power, the object side of the third lens is convex near the optical axis, and the image side of the third lens is concave near the optical axis.

[0009] The fourth lens has positive refractive power, and both the object-side and image-side surfaces of the fourth lens are convex near the optical axis.

[0010] The fifth lens has positive refractive power, and both the object-side and image-side surfaces of the fifth lens are convex near the optical axis.

[0011] The sixth lens has negative refractive power, and both the object-side and image-side surfaces of the sixth lens are concave near the optical axis.

[0012] The seventh lens has positive refractive power, and the object side of the seventh lens is convex near the optical axis;

[0013] The optical lens satisfies the following relationship:

[0014] 130°≤FOV≤140° and 1.6≤FNO≤1.7;

[0015] Wherein, FOV is the maximum field of view of the optical lens, and FNO is the aperture number of the optical lens.

[0016] In the optical lens provided in this application, the first lens has negative refractive power, a convex object-side surface, and a concave image-side surface. The meniscus shape of the convex surface facing the object side makes the refraction angle of the incident light more gradual, avoiding excessive aberrations caused by overly strong refraction changes, and also helps to increase the field of view of the optical lens. The second lens has negative refractive power and a concave object-side surface, which can initially correct the astigmatism of the optical lens and effectively control the direction of light. The third lens has positive refractive power, and its object-side surface is convex while its image-side surface can be concave, allowing light to smoothly transition to the image side and effectively controlling the direction of light, which is beneficial to improving image quality. The fourth lens has positive refractive power, and both its object-side and image-side surfaces are convex, which helps to lower the incident angle of light after passing through the aperture, allowing more light to enter the optical lens on the image side and improving the illumination of the optical lens. The fifth lens has positive refractive power, and both its object-side and image-side surfaces are convex near the optical axis, which helps to reduce chromatic aberration of the optical lens. At the same time, the positive refractive power of the fifth lens also helps to converge the light rays and reduce the overall length of the optical lens. The sixth lens has negative refractive power, and both its object-side and image-side surfaces are concave near the optical axis. Combined with the positive refractive power of the fifth lens, this helps eliminate chromatic aberration, correct astigmatism, improve resolution, and reduce the light deflection angle, thus lowering the sensitivity of the optical lens. The seventh lens has positive refractive power, and its object-side surface is convex near the optical axis, enabling light convergence, reducing the overall optical length, and further facilitating the miniaturization of the optical lens.

[0017] The optical lens satisfies the relationship 130°≤FOV≤140°. By reasonably setting the maximum field of view of the optical lens, a sufficient field of view can be provided to meet the large field of view requirements of the optical lens.

[0018] The optical lens satisfies the relationship 1.6≤FNO≤1.7. By constraining the aperture number of the optical lens, the large aperture required by the optical lens can be met, increasing the amount of light entering the lens and making the optical lens highly illuminant. This allows it to have good image quality in dark environments such as at night or on rainy days, meeting the requirements of large aperture and high resolution.

[0019] As an optional implementation, in an embodiment of the first aspect of this application, the optical lens satisfies the following relationship:

[0020] 8.0≤TTL / F≤8.2, and / or, 0.82≤F / IMGH≤0.88, and / or, 79°≤FOV / FNO≤85°;

[0021] Wherein, TTL is the distance on the optical axis from the object side of the first lens to the imaging surface of the optical lens, F is the focal length of the optical lens, and IMGH is half the image height corresponding to the maximum field of view of the optical lens.

[0022] Optical lenses that satisfy the relationship 8.0≤TTL / F≤8.2 are beneficial for miniaturizing optical lenses, improving resolution, reducing lens sensitivity, and also enabling optical lenses to have wide-angle characteristics.

[0023] An optical lens satisfies the relationship 0.82≤F / IMGH≤0.88. By constraining the ratio of the total effective focal length of the optical lens to the image height corresponding to the maximum field of view of the optical lens within a reasonable range, it is beneficial for the optical lens to achieve large image plane characteristics and improve the resolution of the optical lens.

[0024] The optical lens satisfies the relationship 79°≤FOV / FNO≤85°. By reasonably controlling the relationship between the field of view and the aperture number of the optical lens, a reasonable field of view and aperture number can be provided for the optical lens. This can take into account both the design difficulty and the field of view requirements, while allowing the aperture to vary within a reasonable range, providing a combination of a large angle of view and a large aperture effect. This satisfies the characteristics of the optical lens, which has a large aperture, high relative illumination, and small distortion.

[0025] As an optional implementation, in an embodiment of the first aspect of this application, the optical lens satisfies the following relationship:

[0026] 2.0≤F3 / F4≤2.9, and / or, 1.8≤F4 / F5≤2.1, and / or, 6.0≤F3 / F≤7.5;

[0027] Wherein, F3 is the focal length of the third lens, F4 is the focal length of the fourth lens, F5 is the focal length of the fifth lens, and F is the focal length of the optical lens.

[0028] The optical lens satisfies the relationship 2.0≤F3 / F4≤2.9. By constraining the ratio of the focal length of the third lens to the focal length of the fourth lens within a reasonable range, the adjacent third and fourth lenses are placed closer together, which is beneficial for the smooth transition of light to the imaging plane and improves the resolving power of the optical lens.

[0029] The optical lens satisfies the relationship 1.8≤F4 / F5≤2.1. By constraining the ratio of the focal length of the fourth lens to the focal length of the fifth lens within a reasonable range, the adjacent fourth and fifth lenses are placed closer together, which is beneficial for the smooth transition of light to the imaging plane and improves the resolving power of the optical lens.

[0030] The optical lens satisfies the relationship 6.0≤F3 / F≤7.5. By properly configuring the focal length of the first lens, it is beneficial to correct the aberrations of the optical lens and improve the image quality.

[0031] As an optional implementation, in an embodiment of the first aspect of this application, the optical lens satisfies the following relationship:

[0032] -5.0≤R8 / F≤-3.5, and / or, 2.5≤F4 / CT4≤3.2, and / or, 1.4≤CT4 / ET4≤1.55;

[0033] Wherein, R8 is the radius of curvature of the image side of the fourth lens at the optical axis, F is the focal length of the optical lens, F4 is the focal length of the fourth lens, CT4 is the thickness of the fourth lens on the optical axis, and ET4 is the distance from the maximum effective aperture of the object side of the fourth lens to the maximum effective aperture of the image side of the fourth lens along the optical axis.

[0034] The optical lens satisfies the relationship -5.0≤R8 / F≤-3.5. By controlling the ratio of the image-side surface of the fourth lens to the total effective focal length of the optical lens within this range, the image-side surface of the fourth lens is controlled to be convex near the optical axis, which has a greater ability to deflect light. This can push down the light rays that have passed through the first, second, and third lenses, alleviate the converging pressure of subsequent lenses, and facilitate the near-perpendicular incident light rays onto the image plane.

[0035] The optical lens satisfies the relationship 2.5≤F4 / CT4≤3.2. By reasonably controlling the relationship between the focal length and thickness of the fourth lens, the focal length of the fourth lens will not be too large, which facilitates aberration correction and reduces the tolerance sensitivity of the fourth lens, thereby reducing the difficulty of the manufacturing process and improving the assembly yield of the optical lens.

[0036] The optical lens satisfies the relationship 1.4≤CT4 / ET4≤1.55, which allows for reasonable control of the thickness ratio of the fourth lens, thereby optimizing the surface shape of the fourth lens. This facilitates the effective convergence of light rays incident at large angles and ensures that the light rays passing through the fourth lens have a smaller deflection angle, thus reducing stray light generation and guaranteeing good imaging performance.

[0037] As an optional implementation, in an embodiment of the first aspect of this application, the image-side surface of the fifth lens is cemented to the object-side surface of the sixth lens, and the optical lens satisfies the following relationship:

[0038] -1.2mm -1 ≤(Vd5-Vd6) / F56≤-0.6mm -1 And / or, -6.5≤F123 / F≤-3.5, and / or, -15≤F56 / F≤-8.0;

[0039] Wherein, Vd5 is the Abbe number of the fifth lens, Vd6 is the Abbe number of the sixth lens, F56 is the combined focal length of the fifth and sixth lenses, F123 is the combined focal length of the first, second, and third lenses, and F is the focal length of the optical lens.

[0040] The optical lens satisfies the relation -1.2mm. -1 ≤(Vd5-Vd6) / F56≤-0.6mm -1 By reasonably setting the ratio of the Abbe number difference between the fifth and sixth lenses to the combined focal length of the fifth and sixth lenses, the chromatic aberration of the optical lens can be effectively corrected, the authenticity of colors can be restored, and the image quality can be improved.

[0041] The optical lens satisfies the relationship -6.5≤F123 / F≤-3.5. By reasonably configuring the combined focal length of the combined lens consisting of the first lens, the second lens, and the third lens, it is beneficial to achieve a wide angle of the optical lens and to correct the field curvature of the optical lens.

[0042] Optical lenses that satisfy the relationship -15≤F56 / F≤-8.0, and properly matching the focal length of cemented lenses, are beneficial for correcting chromatic aberration and balancing various aberrations, improving resolution, and effectively reducing tolerance sensitivity, thereby enhancing the imaging quality of optical lenses.

[0043] As an optional implementation, in an embodiment of the first aspect of this application, the optical lens satisfies the following relationship:

[0044] 0.5≤(d34-d45) / d34≤0.9, and / or, 3.5≤∑CT / ∑AT≤3.9, and / or, 4.2≤TTL / CTMAX≤4.6;

[0045] Wherein, d34 is the distance on the optical axis between the image-side surface of the third lens and the object-side surface of the fourth lens, d45 is the distance on the optical axis between the image-side surface of the fourth lens and the object-side surface of the fifth lens, ∑CT is the sum of the thicknesses on the optical axis of all lenses from the first lens to the seventh lens, ∑AT is the sum of the air gaps between two adjacent lenses from the first lens to the seventh 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, and CTMAX is the maximum value of the thicknesses on the optical axis of all lenses from the first lens to the seventh lens.

[0046] The optical lens satisfies the relationship 0.5≤(d34-d45) / d34≤0.9. By properly configuring the gaps between the third and fourth lenses, as well as between the fourth and fifth lenses, it helps to ensure that each lens in the optical lens has enough space for proper arrangement.

[0047] The optical lens satisfies the relationship 3.5≤∑CT / ∑AT≤3.9. By reasonably controlling the ratio of the sum of the thicknesses of all lenses on the optical axis to the sum of the air gaps between adjacent lenses from the first to the seventh lens, the overall structure of the optical lens is made more compact, which is conducive to shortening the total length of the optical lens and thus realizing the miniaturization of the optical lens.

[0048] The optical lens satisfies the relationship 4.2≤TTL / CTMAX≤4.6. By reasonably controlling the maximum thickness of all lenses from the first to the seventh lens on the optical axis, it is beneficial to compress the thickness of the optical lens and achieve an ultra-thin design.

[0049] As an optional implementation, in an embodiment of the first aspect of this application, the optical lens satisfies the following relationship:

[0050] 0.6≤R5 / R6≤0.8, and / or, 1.2≤CT7 / ET7≤1.4, and / or, 1.6≤SD1 / SD14≤1.75;

[0051] Wherein, R5 is the radius of curvature of the object side of the third lens at the optical axis, R6 is the radius of curvature of the image side of the third lens at the optical axis, CT7 is the thickness of the seventh lens on the optical axis, ET7 is the distance from the maximum effective aperture of the object side of the seventh lens to the maximum effective aperture of the image side of the seventh lens along the optical axis, SD1 is the maximum effective half-aperture of the object side of the first lens, and SD14 is the maximum effective half-aperture of the image side of the seventh lens.

[0052] The optical lens satisfies the relationship 0.6≤R5 / R6≤0.8. By properly setting the curvature radii of the object-side and image-side surfaces of the third lens at the optical axis, the incident light rays refracted by the first and second lenses can be effectively collected and compressed, allowing the light rays to smoothly transition into the rear optical lens, reducing aberrations and improving the imaging quality of the optical lens.

[0053] The optical lens satisfies the relationship 1.2≤CT7 / ET7≤1.4, which allows for reasonable control of the thickness ratio of the seventh lens, thereby optimizing the surface shape of the seventh lens. This facilitates the effective convergence of light rays incident at large angles and ensures that the light rays passing through the seventh lens have a smaller deflection angle, thus reducing the generation of stray light and ensuring good imaging performance.

[0054] The optical lens satisfies the relationship 1.6≤SD1 / SD14≤1.75, which gives the optical lens the characteristic of small aperture, effectively converging light and allowing light to enter the imaging plane of the optical lens better.

[0055] As an optional implementation, in an embodiment of the first aspect of this application, the optical lens satisfies the following relationship:

[0056] 1.8≤F*tan(FOV / 2) / TTL≤2.3, and / or, 112°≤FOV*F / IMGH≤119°, and / or, -1.009°≤(FOV*F) / (IMGH-FOV*F)≤-1.004°;

[0057] Where F is the focal length of the optical lens, TTL is the distance on the optical axis from the object side of the first lens to the imaging surface of the optical lens, and IMGH is half the image height corresponding to the maximum field of view of the optical lens.

[0058] Optical lenses satisfy the relationship 1.8≤F*tan(FOV / 2) / TTL≤2.3. By reasonably controlling the relationship between the focal length, field of view, and total optical length of the optical lens, the total optical length of the optical lens can be effectively limited while ensuring a large field of view, which is conducive to the miniaturization of the lens.

[0059] Optical lenses satisfy the relationship 112°≤FOV*F / IMGH≤119°. By reasonably controlling the relationship between the total effective focal length of the optical lens, the maximum field of view of the optical lens, and the image height corresponding to the maximum field of view of the optical lens, a large angular resolution of the optical lens can be achieved. This helps to meet the requirements of small distortion and large field of view of the optical lens while improving the overall effect of the optical lens.

[0060] The optical lens satisfies the relationship -1.009°≤(FOV*F) / (IMGH-FOV*F)≤-1.004°. By reasonably controlling the relationship between the total effective focal length, the maximum field of view of the optical lens, and the image height corresponding to the maximum field of view of the optical lens, it is possible to increase the focal length of the optical lens and highlight the imaging effect of the central area of ​​the imaging surface of the optical lens while keeping the field of view and imaging plane size unchanged.

[0061] Secondly, this application discloses a camera module, which includes an image sensor and any one of the aforementioned optical lenses, wherein the image sensor is disposed on the image side of the optical lens.

[0062] Thirdly, this application discloses a terminal device, including a housing and the aforementioned camera module, wherein the camera module is disposed in the housing.

[0063] Compared with the prior art, the beneficial effects of this application are as follows:

[0064] In the optical lens provided in this application, the first lens has negative refractive power, a convex object-side surface, and a concave image-side surface. The meniscus shape of the convex surface facing the object side makes the refraction angle of the incident light more gradual, avoiding excessive aberrations caused by overly strong refraction changes, and also helps to increase the field of view of the optical lens. The second lens has negative refractive power and a concave object-side surface, which can initially correct the astigmatism of the optical lens and effectively control the direction of light. The third lens has positive refractive power, and its object-side surface is convex while its image-side surface can be concave, allowing light to smoothly transition to the image side and effectively controlling the direction of light, which is beneficial to improving image quality. The fourth lens has positive refractive power, and both its object-side and image-side surfaces are convex, which helps to lower the incident angle of light after passing through the aperture, allowing more light to enter the optical lens on the image side and improving the illumination of the optical lens. The fifth lens has positive refractive power, and both its object-side and image-side surfaces are convex near the optical axis, which helps to reduce chromatic aberration of the optical lens. At the same time, the positive refractive power of the fifth lens also helps to converge the light rays and reduce the overall length of the optical lens. The sixth lens has negative refractive power, and both its object-side and image-side surfaces are concave near the optical axis. Combined with the positive refractive power of the fifth lens, this helps eliminate chromatic aberration, correct astigmatism, improve resolution, and reduce the light deflection angle, thus lowering the sensitivity of the optical lens. The seventh lens has positive refractive power, and its object-side surface is convex near the optical axis, enabling light convergence, reducing the overall optical length, and further facilitating the miniaturization of the optical lens.

[0065] The optical lens satisfies the relationship 130°≤FOV≤140°. By reasonably setting the maximum field of view of the optical lens, a sufficient field of view can be provided to meet the large field of view requirements of the optical lens.

[0066] The optical lens satisfies the relationship 1.6≤FNO≤1.7. By constraining the aperture number of the optical lens, the large aperture required by the optical lens can be met, increasing the amount of light entering the lens and making the optical lens highly illuminant. This allows it to have good image quality in dark environments such as at night or on rainy days, meeting the requirements of large aperture and high resolution. Attached Figure Description

[0067] To more clearly illustrate the technical solutions in the embodiments of this application, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0068] Figure 1 This is a schematic diagram of the structure of the optical lens disclosed in Embodiment 1 of this application;

[0069] Figure 2 These are the spherical aberration diagram (mm), astigmatism diagram (mm), and distortion diagram (%) of the optical lens disclosed in Embodiment 1 of this application;

[0070] Figure 3 This is a schematic diagram of the structure of the optical lens disclosed in Embodiment 2 of this application;

[0071] Figure 4 These are the spherical aberration diagram (mm), astigmatism diagram (mm), and distortion diagram (%) of the optical lens disclosed in Embodiment 2 of this application;

[0072] Figure 5 This is a schematic diagram of the structure of the optical lens disclosed in Embodiment 3 of this application;

[0073] Figure 6 These are the spherical aberration diagram (mm), astigmatism diagram (mm), and distortion diagram (%) of the optical lens disclosed in Embodiment 3 of this application;

[0074] Figure 7 This is a schematic diagram of the structure of the optical lens disclosed in Embodiment 4 of this application;

[0075] Figure 8 These are the spherical aberration diagram (mm), astigmatism diagram (mm), and distortion diagram (%) of the optical lens disclosed in Embodiment 4 of this application;

[0076] Figure 9 This is a schematic diagram of the structure of the optical lens disclosed in Embodiment 5 of this application;

[0077] Figure 10 These are the spherical aberration diagram (mm), astigmatism diagram (mm), and distortion diagram (%) of the optical lens disclosed in Embodiment 5 of this application;

[0078] Figure 11This is a schematic diagram of the structure of the optical lens disclosed in Embodiment 6 of this application;

[0079] Figure 12 These are the spherical aberration diagram (mm), astigmatism diagram (mm), and distortion diagram (%) of the optical lens disclosed in Embodiment 6 of this application;

[0080] Figure 13 This is a schematic diagram of the structure of the optical lens disclosed in Embodiment 7 of this application;

[0081] Figure 14 These are the spherical aberration diagram (mm), astigmatism diagram (mm), and distortion diagram (%) of the optical lens disclosed in Embodiment 7 of this application;

[0082] Figure 15 This is a schematic diagram of the camera module disclosed in this application;

[0083] Figure 16 This is a structural diagram of the terminal device disclosed in this application when it is a car. Detailed Implementation

[0084] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0085] In this application, the terms "upper," "front," "rear," "top," "inner," "outer," and "middle," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. These terms are primarily for the purpose of better describing this application and its embodiments, and are not intended to limit the indicated device, element, or component to having a specific orientation, or to be constructed and operated in a specific orientation.

[0086] Furthermore, in addition to indicating location or positional relationship, some of the aforementioned terms may also have other meanings. For example, the term "above" may also be used in some cases to indicate a certain dependency or connection relationship. Those skilled in the art can understand the specific meaning of these terms in this application based on the specific circumstances.

[0087] Furthermore, the term "setup" should be interpreted broadly. For example, it can refer to a fixed connection, a detachable connection, or an integral structure; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection via an intermediate medium, or an internal connection between two devices, components, or parts. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0088] Furthermore, the terms "first," "second," etc., are primarily used to distinguish different devices, elements, or components (which may be the same or different in specific type and construction), and are not intended to indicate or imply the relative importance or quantity of the indicated devices, elements, or components. Unless otherwise stated, "a plurality of" means two or more.

[0089] While some optical lenses for automotive applications have been proposed in related technologies, these lenses suffer from inherent problems. For example: they cannot simultaneously meet the requirements of high resolution and miniaturization; although they can achieve megapixel resolution, aberrations such as chromatic aberration, astigmatism, and distortion are quite severe; their light-gathering ability is weak, making them unsuitable for low-light environments such as nighttime or rainy days; they cannot simultaneously meet the requirements of small front-end diameter and miniaturization; and they cannot simultaneously meet the requirements of large aperture and high resolution.

[0090] The technical solution of this application will be further described below with reference to the embodiments and accompanying drawings.

[0091] Please see Figure 1 This application discloses an optical lens 100, which includes a first lens L1, a second lens L2, a third lens L3, a fourth lens L4, a fifth lens L5, a sixth lens L6, and a seventh lens L7 arranged sequentially along the optical axis from the object side to the image side. The first lens L1 has negative refractive power, the second lens L2 has negative refractive power, the third lens L3 has positive refractive power, the fourth lens L4 has positive refractive power, the fifth lens L5 has positive refractive power, the sixth lens L6 has negative refractive power, and the seventh lens L7 has positive refractive power. During imaging, light rays enter sequentially from the object side of the first lens L1 through the first lens L1, second lens L2, third lens L3, fourth lens L4, fifth lens L5, sixth lens L6, and seventh lens L7, and are finally imaged onto the imaging plane SI of the optical lens 100.

[0092] Furthermore, the object-side surface S1 of the first lens L1 is convex near the optical axis, and the image-side surface S2 of the first lens L1 is concave near the optical axis; the object-side surface S3 of the second lens L2 is concave near the optical axis, and the image-side surface S4 of the second lens L2 is convex near the optical axis; the object-side surface S5 of the third lens L3 is convex near the optical axis, and the image-side surface S6 of the third lens L3 is concave near the optical axis; the object-side surface S7 of the fourth lens L4 is convex near the optical axis, and the... The image-side surface S8 of the fourth lens L4 is convex near the optical axis; the object-side surface S9 of the fifth lens L5 is convex near the optical axis, and the image-side surface S10 of the fifth lens L5 is convex near the optical axis; the object-side surface S11 of the sixth lens L6 is concave near the optical axis, and the image-side surface S12 of the sixth lens L6 is concave near the optical axis; the object-side surface S13 of the seventh lens L7 is convex near the optical axis, and the image-side surface S14 of the seventh lens L7 is either convex or concave near the optical axis.

[0093] Optionally, all lenses in the optical lens 100 may be made of glass, or all may be made of plastic, or some lenses may be made of glass and some of them may be made of plastic. Preferably, all lenses in the optical lens 100 are made of glass. Lenses made of glass can suppress the shift in the back focus of the optical lens 100 caused by temperature changes, thereby improving the stability of the optical lens 100. At the same time, using glass can avoid image blurring caused by high and low temperature changes in the operating environment, which would affect the normal use of the optical lens 100.

[0094] Optionally, the first lens L1, the second lens L2, the fourth lens L4, the fifth lens L5, and the sixth lens L6 can be spherical lenses, while the third lens L3 and the seventh lens L7 can be aspherical lenses. Combining spherical and aspherical lenses can improve higher-order aberrations, thereby enhancing the imaging quality of the optical lens 100. Specifically, the seventh lens L7, being aspherical, can effectively correct astigmatism in the optical lens 100 and also effectively correct distortion at the edges of the field of view.

[0095] In some embodiments, the optical lens 100 further includes an aperture stop 102, which can be an aperture stop and / or a field stop, and can be disposed between the image-side surface S6 of the third lens L3 and the object-side surface S7 of the fourth lens L4 of the optical lens 100. It is understood that in other embodiments, the aperture stop 102 can also be disposed between other lenses, and the setting can be adjusted according to the actual situation. This embodiment does not make specific limitations.

[0096] In some embodiments, the optical lens 100 further includes a filter 110, which can be disposed between the image-side surface S14 of the seventh lens L7 and the imaging surface S1 of the optical lens 100. Of course, in other embodiments, the filter 110 can also be disposed between other lenses, and the setting can be adjusted according to actual conditions; this embodiment does not impose specific limitations. In this embodiment, the filter 110 can be an infrared cut-off filter, thereby filtering out light of other wavelengths such as infrared light, allowing only visible light to pass through, making the image more consistent with the visual experience of the human eye. Of course, the filter 110 can also be an infrared bandpass filter, thereby filtering out light of other wavelengths such as visible light, allowing only infrared light to pass through. By filtering out light of other wavelengths such as visible light, the image quality is improved; and the optical lens 100 can be used as an infrared optical lens 100, that is, the optical lens 100 can also image and obtain better image effects in dim environments and other special application scenarios. Preferably, the filter 110 can be made of glass. Of course, in other embodiments, the filter 110 can also be made of optical glass with a coating, or a filter 110 of other materials. The choice can be made according to actual needs, and no specific limitation is made in this embodiment.

[0097] In some embodiments, the optical lens 100 also includes a protective glass 120 disposed between the filter 110 and the imaging surface 101, so that it can be close to the image sensor during subsequent assembly, thereby playing a protective role.

[0098] In one embodiment, the optical lens 100 satisfies the relationship 130°≤FOV≤140°. By reasonably setting the maximum field of view of the optical lens 100, a sufficient field of view can be provided for the optical lens 100 to meet the large field of view requirement of the optical lens 100.

[0099] In one embodiment, the optical lens 100 satisfies the relationship 1.6≤FNO≤1.7. By constraining the aperture number of the optical lens 100, the large aperture required by the optical lens 100 can be met, increasing the amount of light entering the lens and making the optical lens 100 highly illuminant. This allows it to have good imaging quality even in dark environments such as at night or on rainy days, thus meeting the requirements of a large aperture and high resolution.

[0100] In one embodiment, the optical lens 100 satisfies the relationship 79°≤FOV / FNO≤85°. By reasonably controlling the relationship between the field of view (FOV) and the aperture number (FNO) of the optical lens 100, a reasonable field of view and aperture number can be provided for the optical lens 100. This can take into account both the design difficulty and the requirements of the field of view, while allowing the aperture to vary within a reasonable range, providing a combination effect of a large angle of view and a large aperture. This satisfies the characteristics of the optical lens 100 having a large aperture, high relative illumination, and small distortion.

[0101] In one embodiment, the optical lens 100 satisfies the relationship 8.0≤TTL / F≤8.2, where TTL is the total length of the optical lens 100 and F is the focal length of the optical lens 100. This facilitates the miniaturization of the optical lens 100, improves the resolution capability, reduces the sensitivity of the optical lens 100, and also enables the optical lens 100 to have wide-angle characteristics.

[0102] In one embodiment, the optical lens 100 satisfies the relationship 0.82≤F / IMGH≤0.88, where IMGH is half of the image height corresponding to the maximum field of view of the optical lens 100. By constraining the ratio of the total effective focal length of the optical lens 100 to the image height corresponding to the maximum field of view of the optical lens 100 within a reasonable range, it is beneficial for the optical lens 100 to achieve large image plane characteristics and improve the resolving power of the optical lens 100.

[0103] In one embodiment, the optical lens 100 satisfies the relationship 6.7≤TTL / IMGH≤7.1. Under a certain image height, by controlling the ratio of the image height to the total optical length of the optical lens 100, the total length of the optical lens 100 can be controlled, which is beneficial to the miniaturization of the optical lens 100.

[0104] In one embodiment, the optical lens 100 satisfies the relationship 2.0≤F3 / F4≤2.9, where F3 is the focal length of the third lens L3 and F4 is the focal length of the fourth lens L4. By constraining the ratio of the focal length of the third lens L3 to the focal length of the fourth lens L4 to be within a reasonable range, the adjacent third lens L3 and fourth lens L4 are kept closer together, which is beneficial for the smooth transition of light to the imaging plane SI and improves the resolving power of the optical lens 100.

[0105] In one embodiment, the optical lens 100 satisfies the relationship 1.8≤F4 / F5≤2.1, where F5 is the focal length of the fifth lens L5. By constraining the ratio of the focal length of the fourth lens L4 to the focal length of the fifth lens L5 to a reasonable range, the adjacent fourth lens L4 and fifth lens L5 are placed closer together, which is beneficial for the smooth transition of light to the imaging plane SI and improves the resolving power of the optical lens 100.

[0106] In one embodiment, the optical lens 100 satisfies the relationship 6.0≤F3 / F≤7.5. By reasonably configuring the focal length of the first lens, it is beneficial to correct the aberration of the optical lens and improve the imaging quality.

[0107] In one embodiment, the optical lens 100 also satisfies the following relationships: -1.78≤F1 / F≤-1.72, -14.2≤F2 / F≤-13.0, 2.6≤F4 / F≤3.1, 1.35≤F5 / F≤1.50, -2≤F6 / F≤-1, and 3.5≤F7 / F≤4.5, where F is the focal length of the optical lens 100, F1 is the focal length of the first lens L1, F2 is the focal length of the second lens L2, F3 is the focal length of the third lens L3, F5 is the focal length of the fifth lens L5, F6 is the focal length of the sixth lens L6, and F7 is the focal length of the seventh lens L7. By satisfying the above formulas, the optical power distribution can be uniform and reasonable, aberrations can be easily corrected, and image quality can be good.

[0108] In one embodiment, the optical lens 100 satisfies the relationship 6≤R1 / R2≤15, where R2 is the radius of curvature of the image side surface S2 of the first lens L1 at the optical axis. By reasonably matching the ratio between the radius of curvature of the object side surface S1 and the image side surface S2 of the first lens L1 at the optical axis, the surface shape difference of each lens is reasonably set, which is beneficial to control the shape of the first lens L1, correct the aberrations it generates, and improve the imaging quality.

[0109] In one embodiment, the optical lens 100 satisfies the relationship -3.6≤R14 / R13≤-3.2, where R13 is the radius of curvature of the object-side surface S13 of the seventh lens L7 at the optical axis, and R14 is the radius of curvature of the image-side surface S12 of the seventh lens L7 at the optical axis. By reasonably matching the ratio between the radii of curvature of the object-side surface S13 and the image-side surface S14 of the seventh lens L7 at the optical axis, the surface shape difference of the seventh lens L7 is reasonably set, which is beneficial to control the shape of the seventh lens L7, correct the aberrations generated by itself, and improve the imaging quality.

[0110] In one embodiment, the optical lens 100 satisfies the relationship -5.0≤R8 / F≤-3.5, where R8 is the radius of curvature of the image-side surface of the fourth lens L4 at the optical axis. By controlling the ratio of the image-side surface of the fourth lens L4 to the total effective focal length of the optical lens 100 within this range, the image-side surface of the fourth lens L4 is controlled to be convex near the optical axis, which has a greater ability to deflect light. This can push down the light rays that have passed through the first lens L1, the second lens L2, and the third lens L3, alleviate the converging pressure of the subsequent lenses, and facilitate the near-perpendicular incident light onto the image surface.

[0111] In one embodiment, the optical lens 100 satisfies the relationship 2.5≤F4 / CT4≤3.2. By reasonably controlling the relationship between the focal length and thickness of the fourth lens L4, the focal length of the fourth lens L4 will not be too large, which facilitates aberration correction and reduces the tolerance sensitivity of the fourth lens L4, reduces the difficulty of the manufacturing process, and helps to improve the assembly yield of the optical lens 100.

[0112] In one embodiment, the optical lens 100 further satisfies the following relationships: -7.5 ≤ F1 / CT1 ≤ -4.0, -7.7 ≤ F2 / CT2 ≤ -7.2, 6.0 ≤ F3 / CT3 ≤ 9.1, 1.45 ≤ F5 / CT5 ≤ 1.60, -10 ≤ F6 / CT6 ≤ -5.0, 5.2 ≤ F7 / CT7 ≤ 7.5, where F1 is the focal length of the first lens L1, CT1 is the thickness of the first lens L1 along the optical axis, and F2 is the focal length of the second lens L1. The focal length of the second lens L2, CT2 is the thickness of the second lens L2 on the optical axis, F3 is the focal length of the third lens L3, CT3 is the thickness of the third lens L3 on the optical axis, F5 is the focal length of the fifth lens L5, CT6 is the thickness of the sixth lens L6 on the optical axis, and F7 is the focal length of the seventh lens L7. By satisfying the above formula, the relationship between the focal length and thickness of each lens can be reasonably limited, which facilitates the correction of aberrations and helps to improve the assembly yield of the optical lens 100.

[0113] In one embodiment, the optical lens 100 satisfies the relationship 1.4≤CT4 / ET4≤1.55, which can reasonably control the thickness ratio of the fourth lens L4, thereby optimizing the surface shape of the fourth lens L4, which is conducive to the effective convergence of light rays incident at large angles, and makes the light rays passing through the fourth lens L4 have a smaller deflection angle, thereby reducing the generation of stray light and ensuring good imaging performance.

[0114] In one embodiment, the optical lens 100 further satisfies the following relationships: 0.40≤CT1 / ET1≤0.65, 0.95≤CT2 / ET2≤0.97, 1.1≤CT3 / ET3≤1.3, 2.1≤CT5 / ET5≤2.3, 0.25≤CT6 / ET6≤0.35, where ET1 is the distance along the optical axis from the maximum effective aperture of the object-side surface of the first lens L1 to the maximum effective aperture along the optical axis of the image-side surface of the first lens L1, ET2 is the distance along the optical axis from the maximum effective aperture of the object-side surface of the second lens L2 to the maximum effective aperture along the optical axis of the image-side surface of the second lens L2, and ET3 is the distance along the optical axis from the maximum effective aperture of the object-side surface of the third lens L3 to the maximum effective aperture along the optical axis of the image-side surface of the third lens L3. ET5 is the distance from the effective aperture to the maximum effective aperture of the image side of the third lens L3 along the optical axis. ET6 is the distance from the maximum effective aperture of the object side of the fifth lens L5 to the maximum effective aperture of the image side of the fifth lens L5 along the optical axis. ET7 is the distance from the maximum effective aperture of the object side of the sixth lens L6 to the maximum effective aperture of the image side of the sixth lens L6 along the optical axis. By satisfying the above formula, the surface shape of each lens can be optimized, thereby reducing the generation of stray light and ensuring good imaging performance.

[0115] In one embodiment, the fifth lens L5 and the sixth lens L6 are cemented lenses, and the optical lens 100 satisfies the relation -1.2mm. -1 ≤(Vd5-Vd6) / F56≤-0.6mm -1 Vd5 is the Abbe number of the fifth lens L5, Vd6 is the Abbe number of the sixth lens L6, and F56 is the combined focal length of the fifth lens L5 and the sixth lens L6. By reasonably setting the ratio of the difference in the Abbe numbers of the fifth lens L5 and the sixth lens L6 to the combined focal length of the fifth lens L5 and the sixth lens L6, the chromatic aberration of the optical lens 100 can be effectively corrected, the authenticity of the colors can be restored, and the image quality can be improved.

[0116] In one embodiment, the optical lens 100 satisfies the relationship -6.5≤F123 / F≤-3.5, where F123 is the combined focal length of the combined lens consisting of the first lens L1, the second lens L2, and the third lens L3. By reasonably configuring the combined focal length of the combined lens consisting of the first lens L1, the second lens L2, and the third lens L3, it is beneficial to achieve a wide angle of the optical lens 100 and to correct the field curvature of the optical lens 100.

[0117] In one embodiment, the optical lens 100 satisfies the relationship -15≤F56 / F≤-8.0. The reasonable matching of the focal length of the cemented lens is beneficial to correct chromatic aberration and balance various aberrations, improve the resolving power, and effectively reduce tolerance sensitivity, thereby improving the imaging quality of the optical lens 100.

[0118] In one embodiment, the optical lens 100 satisfies the relationship 0.5≤(d34-d45) / d34≤0.9, where d34 is the distance on the optical axis between the image side of the third lens L3 and the object side of the fourth lens L4, and d45 is the distance on the optical axis between the image side of the fourth lens L4 and the object side of the fifth lens L5. By reasonably configuring the gaps between the third lens L3 and the fourth lens L4, and between the fourth lens L4 and the fifth lens L5, it helps that each lens in the optical lens 100 has enough space for reasonable arrangement.

[0119] In one embodiment, the optical lens 100 satisfies the relationship 3.5 ≤ ∑CT / ∑AT ≤ 3.9, where ∑CT is the sum of the thicknesses of all lenses from the first lens L1 to the seventh lens L7 along the optical axis, and ∑AT is the sum of the air gaps between adjacent lenses from the first lens L1 to the seventh lens L7. By reasonably controlling the ratio of the sum of the thicknesses of all lenses along the optical axis to the sum of the air gaps between adjacent lenses from the first lens L1 to the seventh lens L7, the overall structure of the optical lens 100 is made more compact, which is beneficial to shortening the total length of the optical lens 100, thereby achieving miniaturization of the optical lens 100.

[0120] In one embodiment, the optical lens 100 satisfies the relationship 4.2≤TTL / CTMAX≤4.6, where CTMAX is the maximum thickness of all lenses from the first lens L1 to the seventh lens L7 on the optical axis. By reasonably controlling the maximum thickness of all lenses from the first lens L1 to the seventh lens L7 on the optical axis, it is beneficial to compress the thickness of the optical lens 100 and achieve an ultra-thin design.

[0121] In one embodiment, the optical lens 100 satisfies the relationship 0.6≤R5 / R6≤0.8, where R5 is the radius of curvature of the object side of the third lens L3 at the optical axis, and R6 is the radius of curvature of the image side of the third lens L3 at the optical axis. By reasonably setting the radii of curvature of the object side and image side of the third lens L3 at the optical axis, the incident light rays refracted by the first lens L1 and the second lens L2 can be effectively collected and compressed, so that the light rays can smoothly transition to the rear optical lens, reduce aberrations, and improve the imaging quality of the optical lens 100.

[0122] In one embodiment, the optical lens 100 further satisfies the following relationships: 3.5≤R1 / R2≤3.7, 0.58≤R3 / R4≤0.60, -0.42≤R7 / R8≤-0.35, -2.0≤R9 / R10≤-1.8, -0.36≤R11 / R12≤-0.32, |R13 / R14|≤0.42, where R1 is the radius of curvature of the object-side surface S1 of the first lens L1 at the optical axis, R2 is the radius of curvature of the image-side surface S2 of the first lens L1 at the optical axis, R3 is the radius of curvature of the object-side surface S3 of the second lens L2 at the optical axis, and R4 is the radius of curvature of the image-side surface S4 of the second lens L2. The radii of curvature at the optical axis are defined as follows: R5 is the radius of curvature of the object-side surface S5 of the third lens L3 at the optical axis; R6 is the radius of curvature of the image-side surface S6 of the third lens L3 at the optical axis; R7 is the radius of curvature of the object-side surface S7 of the fourth lens L4 at the optical axis; R8 is the radius of curvature of the image-side surface S8 of the fourth lens L4 at the optical axis; R9 is the radius of curvature of the object-side surface S9 of the fifth lens L5 at the optical axis; R10 is the radius of curvature of the image-side surface S10 of the fifth lens L5 at the optical axis; R11 is the radius of curvature of the object-side surface S11 of the sixth lens L6 at the optical axis; and R12 is the radius of curvature of the image-side surface S12 of the sixth lens L6 at the optical axis. By reasonably matching the ratio of the radii of curvature of the object-side and image-side surfaces of each lens at the optical axis, the surface shape differences of each lens are set reasonably, which is beneficial to controlling the shape of each lens, correcting the aberrations generated by the lenses themselves, and improving the image quality.

[0123] In one embodiment, the optical lens 100 satisfies the relationship 1.2≤CT7 / ET7≤1.4, where CT7 is the thickness of the seventh lens L7 on the optical axis, and ET7 is the distance from the maximum effective aperture of the object side of the seventh lens L7 to the maximum effective aperture of the image side of the seventh lens L7 along the optical axis. This allows for reasonable control of the thickness ratio of the seventh lens L7, thereby optimizing the surface shape of the seventh lens L7. This facilitates the effective convergence of light rays incident at large angles and ensures that the light rays passing through the seventh lens L7 have a smaller deflection angle, thereby reducing the generation of stray light and ensuring good imaging performance.

[0124] In one embodiment, the optical lens 100 satisfies the relationship 1.6≤SD1 / SD14≤1.75, where SD1 is the maximum effective half-aperture of the object side of the first lens L1 and SD14 is the maximum effective half-aperture of the image side of the seventh lens L7. This is beneficial for controlling the overall size of the optical lens 100, maintaining miniaturization while ensuring good imaging effect.

[0125] In one embodiment, the optical lens 100 satisfies the relationship 1.8≤F*tan(FOV / 2) / TTL≤2.3. By reasonably controlling the relationship between the focal length, field of view and total optical length of the optical lens, the total optical length of the optical lens can be effectively limited while ensuring a large field of view, which is conducive to miniaturization of the lens.

[0126] In one embodiment, the optical lens 100 satisfies the relationship 112°≤FOV*F / IMGH≤119°. By reasonably controlling the relationship between the total effective focal length of the optical lens 100, the maximum field of view of the optical lens 100, and the image height corresponding to the maximum field of view of the optical lens 100, a large angular resolution of the optical lens 100 can be achieved. This helps to satisfy the requirements of small distortion and large field of view of the optical lens 100 while improving the overall effect of the optical lens 100.

[0127] In one embodiment, the optical lens 100 satisfies the relationship -1.009°≤(FOV*F) / (IMGH-FOV*F)≤-1.004°. By reasonably controlling the relationship between the total effective focal length, the maximum field of view of the optical lens 100, and the image height corresponding to the maximum field of view of the optical lens 100, it is possible to increase the focal length of the optical lens 100 while keeping the field of view and imaging surface size of the optical lens 100 unchanged, thereby highlighting the imaging effect of the central area of ​​the imaging surface SI of the optical lens 100.

[0128] Example 1

[0129] Figure 1This is a schematic diagram of the structure of the optical lens 100 disclosed in Embodiment 1 of this application. The optical lens 100 includes a first lens L1, a second lens L2, a third lens L3, an aperture stop 102, a fourth lens L4, a fifth lens L5, a sixth lens L6, a seventh lens L7, a filter 110, and a protective glass 120, arranged sequentially along the optical axis from the object side to the image side. Specifically, the object side S1 of the first lens L1 is convex near the optical axis, and the image side S2 of the first lens L1 is concave near the optical axis; the object side S3 of the second lens L2 is concave near the optical axis, and the image side S4 of the second lens L2 is convex near the optical axis; the object side S5 of the third lens L3 is convex near the optical axis, and the image side S6 of the third lens L3 is concave near the optical axis; the object side S7 of the fourth lens L4 is convex near the optical axis, and the... The image-side surface S8 of lens L4 is convex near the optical axis; the object-side surface S9 and S10 of lens L5 are both convex near the optical axis; the object-side surface S11 and S12 of lens L6 are both concave near the optical axis; and the object-side surface S13 and S14 of lens L7 are both convex near the optical axis. Lenses L5 and L6 are cemented together, and the image-side surface of lens L5 and the object-side surface of lens L6 can be considered as a single surface.

[0130] Specifically, taking the optical lens 100 with a focal length F = 3.88134 mm, an aperture number FNO = 1.64, and a maximum field of view (FOV) of 138.2° as an example, other parameters of the optical lens 100 are given in Table 1 below. The elements along the optical axis of the optical lens 100, from the object side to the image side, are arranged sequentially according to the order of the elements in Table 1 from top to bottom. In the same lens, the surface with the smaller surface number is the object side of the lens, and the surface with the larger surface number is the image side of the lens. For example, surface numbers 1 and 2 correspond to the object side S1 and image side S2 of the first lens L1, respectively. The Y-radius in Table 1 is the radius of curvature of the corresponding object side or image side at the optical axis. The first value in the "thickness" parameter column of the lens is the thickness of the lens on the optical axis, and the second value is the distance from the image side of the lens to the next surface on the optical axis. The value of the aperture stop 102 in the "Thickness" parameter column represents the distance on the optical axis from the aperture stop 102 to the vertex of the next surface (the vertex refers to the intersection of the surface and the optical axis). By default, the direction from the object side of the first lens L1 to the image side of the last lens is the positive direction of the optical axis. When this value is negative, it indicates that the aperture stop 102 is set on the image side of the vertex of the next surface. If the thickness of the aperture stop 102 is positive, the aperture stop 102 is on the object side of the vertex of the next surface. It can be understood that the units of Y radius, thickness, and focal length in Table 1 are all mm. Moreover, the refractive index, Abbe number, etc. in Table 1 are all obtained at a reference wavelength of 587.5618 nm, and the focal length is obtained at a reference wavelength of 558 nm.

[0131] Table 1

[0132]

[0133]

[0134] In Example 1, the object-side surface S5 and image-side surface S6 of the third lens L3, and the object-side surface S13 and image-side surface S14 of the seventh lens L7 are both aspherical. The surface shape x of each aspherical lens can be defined using, but is not limited to, the following aspherical formula:

[0135]

[0136] Where x is the distance vector from the vertex of the aspherical surface at a height h along the optical axis; c is the curvature of the aspherical surface at the optical axis, c = 1 / Y (i.e., the paraxial curvature c is the reciprocal of the radius of curvature Y in Table 1 above); K is the conic coefficient; Ai is the i-th order correction coefficient of the aspherical surface. Table 2 below gives the higher-order coefficients A4, A6, A8, A10, A12, A14, A16, A18, and A20 of the aspherical surfaces of the third lens L3 and the seventh lens L7.

[0137] Table 2

[0138]

[0139] Figure 2 These are the spherical aberration diagram (mm), astigmatism diagram (mm), and distortion diagram (%) of the optical lens 100 disclosed in Embodiment 1 of this application. Figure 2 Figure (A) shows the spherical aberration diagram of optical lens 100 at wavelengths of 661nm, 614nm, 558nm, 502nm, and 455nm. The x-axis represents the focus shift in mm, and the y-axis represents the normalized field of view. Figure 2 As can be seen from (A) in Example 1, the spherical aberration value of the optical lens 100 is better, indicating that the imaging quality of the optical lens 100 in this example is better.

[0140] Figure 2 (B) in the figure shows the astigmatism of the optical lens 100 in Example 1 at a wavelength of 558 nm. The horizontal axis along the X-axis represents the focus shift in mm, and the vertical axis along the Y-axis represents the image height in mm. In the astigmatism diagram, T represents the curvature of the imaging surface 101 in the meridional direction, and S represents the curvature of the imaging surface 101 in the sagittal direction. Figure 2 As can be seen from (B) in the figure, at this wavelength, the field curvature of the optical lens 100 is small, and the field curvature and astigmatism of each field of view are well corrected. The center and edge of the field of view have clear imaging, that is, the astigmatism of the optical lens 100 is well compensated.

[0141] Figure 2 (C) in the figure represents the distortion diagram of the optical lens 100 in Example 1 at a wavelength of 558 nm. The horizontal axis along the X-axis represents distortion, and the vertical axis along the Y-axis represents image height, in mm. Figure 2 As can be seen from (C), at this wavelength, the image distortion caused by the main beam is small, and the distortion of the optical lens 100 is well corrected.

[0142] Example 2

[0143] Figure 3This is a schematic diagram of the structure of the optical lens 100 disclosed in Embodiment 2 of this application. The optical lens 100 includes a first lens L1, a second lens L2, a third lens L3, an aperture stop 102, a fourth lens L4, a fifth lens L5, a sixth lens L6, a seventh lens L7, a filter 110, and a protective glass 120, arranged sequentially along the optical axis from the object side to the image side. Specifically, the object side S1 of the first lens L1 is convex near the optical axis, and the image side S2 of the first lens L1 is concave near the optical axis; the object side S3 of the second lens L2 is concave near the optical axis, and the image side S4 of the second lens L2 is convex near the optical axis; the object side S5 of the third lens L3 is convex near the optical axis, and the image side S6 of the third lens L3 is concave near the optical axis; the object side S7 of the fourth lens L4 is convex near the optical axis, and the... The image-side surface S8 of lens L4 is convex near the optical axis; the object-side surface S9 and S10 of lens L5 are both convex near the optical axis; the object-side surface S11 and S12 of lens L6 are both concave near the optical axis; and the object-side surface S13 and S14 of lens L7 are both convex near the optical axis. Lenses L5 and L6 are cemented together, and the image-side surface of lens L5 and the object-side surface of lens L6 can be considered as a single surface.

[0144] Specifically, taking the optical lens 100 with a focal length F = 3.88945mm, an aperture number FNO = 1.64, and a maximum field of view (FOV) of 138.2° as an example, other parameters of the optical lens 100 are given in Table 3 below. The definitions of each parameter can be derived from the description of the aforementioned embodiments and will not be repeated here. Furthermore, the refractive index, Abbe number, etc., in Table 2 were obtained at a reference wavelength of 587.5618nm, and the focal length was obtained at a reference wavelength of 558nm. In addition, regarding the correspondence between the surface numbers of each lens and the object-side and image-side surfaces of each lens, please refer to the description in the aforementioned Embodiment 1, which will not be repeated here.

[0145] Table 3

[0146]

[0147] Table 4 gives the higher-order coefficients that can be used for each aspherical mirror surface of the third lens L3 and the seventh lens L7 in Example 2, wherein each aspherical surface shape can be defined by the formula given in Example 1.

[0148] Table 4

[0149]

[0150] Please see Figure 4 ,Depend on Figure 4As can be seen from (A) the spherical aberration diagram, (B) the ray astigmatism diagram, and (C) the distortion diagram, the spherical aberration, astigmatism, and distortion of the optical lens 100 are all well controlled, thus the optical lens 100 of this embodiment has good imaging quality. Furthermore, regarding... Figure 4 (A) Figure 4 (B) and Figure 4 The wavelengths corresponding to the curves in (C) can be found in Example 1. Figure 2 (A) Figure 2 (B) Figure 2 The content described in (C) will not be repeated here.

[0151] Example 3

[0152] Figure 5 This is a schematic diagram of the structure of the optical lens 100 disclosed in Embodiment 3 of this application. The optical lens 100 includes a first lens L1, a second lens L2, a third lens L3, an aperture stop 102, a fourth lens L4, a fifth lens L5, a sixth lens L6, a seventh lens L7, a filter 110, and a protective glass 120, arranged sequentially along the optical axis from the object side to the image side. Specifically, the object side S1 of the first lens L1 is convex near the optical axis, and the image side S2 of the first lens L1 is concave near the optical axis; the object side S3 of the second lens L2 is concave near the optical axis, and the image side S4 of the second lens L2 is convex near the optical axis; the object side S5 of the third lens L3 is convex near the optical axis, and the image side S6 of the third lens L3 is concave near the optical axis; the object side S7 of the fourth lens L4 is convex near the optical axis, and the... The image-side surface S8 of lens L4 is convex near the optical axis; the object-side surface S9 and S10 of lens L5 are both convex near the optical axis; the object-side surface S11 and S12 of lens L6 are both concave near the optical axis; and the object-side surface S13 and S14 of lens L7 are both convex near the optical axis. Lenses L5 and L6 are cemented together, and the image-side surface of lens L5 and the object-side surface of lens L6 can be considered as a single surface.

[0153] Specifically, taking the focal length F = 3.88483 mm, the aperture number FNO = 1.64, and the maximum field of view FOV = 138.2° of the optical lens 100 as examples, other parameters of the optical lens 100 are given in Table 5 below. The definitions of each parameter can be derived from the description of the aforementioned embodiments and will not be repeated here. Furthermore, the refractive index, Abbe number, etc., in Table 2 are obtained at a reference wavelength of 587.5618 nm, and the focal length is obtained at a reference wavelength of 558 nm. In addition, regarding the correspondence between the surface numbers of each lens and the object-side and image-side surfaces of each lens, please refer to the description in the aforementioned Embodiment 1, which will not be repeated here.

[0154] Table 5

[0155]

[0156]

[0157] Table 6 provides the higher-order coefficients for each aspherical surface of the third lens L3 and the seventh lens L7 in Example 3, wherein each aspherical surface shape can be defined by the formula given in Example 1.

[0158] Table 6

[0159]

[0160] Please see Figure 6 ,Depend on Figure 6 As can be seen from (A) the spherical aberration diagram, (B) the ray astigmatism diagram, and (C) the distortion diagram, the spherical aberration, astigmatism, and distortion of the optical lens 100 are all well controlled, thus the optical lens 100 of this embodiment has good imaging quality. Furthermore, regarding... Figure 6 (A) Figure 6 (B) and Figure 6 The wavelengths corresponding to the curves in (C) can be found in Example 1. Figure 2 (A) Figure 2 (B) Figure 2 The content described in (C) will not be repeated here.

[0161] Example 4

[0162] Figure 7This is a schematic diagram of the structure of the optical lens 100 disclosed in Embodiment 4 of this application. The optical lens 100 includes a first lens L1, a second lens L2, a third lens L3, an aperture stop 102, a fourth lens L4, a fifth lens L5, a sixth lens L6, a seventh lens L7, a filter 110, and a protective glass 120, arranged sequentially along the optical axis from the object side to the image side. Specifically, the object side S1 of the first lens L1 is convex near the optical axis, and the image side S2 of the first lens L1 is concave near the optical axis; the object side S3 of the second lens L2 is concave near the optical axis, and the image side S4 of the second lens L2 is convex near the optical axis; the object side S5 of the third lens L3 is convex near the optical axis, and the image side S6 of the third lens L3 is concave near the optical axis; the object side S7 of the fourth lens L4 is convex near the optical axis, and the... The image-side surface S8 of lens L4 is convex near the optical axis; the object-side surface S9 and S10 of lens L5 are both convex near the optical axis; the object-side surface S11 and S12 of lens L6 are both concave near the optical axis; and the object-side surface S13 and S14 of lens L7 are both convex near the optical axis. Lenses L5 and L6 are cemented together, and the image-side surface of lens L5 and the object-side surface of lens L6 can be considered as a single surface.

[0163] Specifically, taking the focal length F = 3.87324 mm, the aperture number FNO = 1.64, and the maximum field of view FOV = 138.2° of the optical lens 100 as examples, other parameters of the optical lens 100 are given in Table 7 below. The definitions of each parameter can be derived from the description of the aforementioned embodiments and will not be repeated here. Furthermore, the refractive index, Abbe number, etc., in Table 7 are obtained at a reference wavelength of 587.5618 nm, and the focal length is obtained at a reference wavelength of 558 nm. In addition, regarding the correspondence between the surface numbers of each lens and the object-side and image-side surfaces of each lens, please refer to the description in the aforementioned Embodiment 1, which will not be repeated here.

[0164] Table 7

[0165]

[0166]

[0167] Table 8 gives the higher-order coefficients that can be used for each aspherical mirror surface of the third lens L3 and the seventh lens L7 in Example 4, wherein each aspherical surface shape can be defined by the formula given in Example 1.

[0168] Table 8

[0169]

[0170] Please see Figure 8 ,Depend on Figure 8 As can be seen from (A) the spherical aberration diagram, (B) the ray astigmatism diagram, and (C) the distortion diagram, the spherical aberration, astigmatism, and distortion of the optical lens 100 are all well controlled, thus the optical lens 100 of this embodiment has good imaging quality. Furthermore, regarding... Figure 8 (A) Figure 8 (B) and Figure 8 The wavelengths corresponding to the curves in (C) can be found in Example 1. Figure 2 (A) Figure 2 (B) Figure 2 The content described in (C) will not be repeated here.

[0171] Example 5

[0172] Figure 9 This is a schematic diagram of the structure of the optical lens 100 disclosed in Embodiment 5 of this application. The optical lens 100 includes a first lens L1, a second lens L2, a third lens L3, an aperture stop 102, a fourth lens L4, a fifth lens L5, a sixth lens L6, a seventh lens L7, a filter 110, and a protective glass 120, arranged sequentially along the optical axis from the object side to the image side. Specifically, the object side S1 of the first lens L1 is convex near the optical axis, and the image side S2 of the first lens L1 is concave near the optical axis; the object side S3 of the second lens L2 is concave near the optical axis, and the image side S4 of the second lens L2 is convex near the optical axis; the object side S5 of the third lens L3 is convex near the optical axis, and the image side S6 of the third lens L3 is concave near the optical axis; the object side S7 of the fourth lens L4 is convex near the optical axis, and the... The image-side surface S8 of lens L4 is convex near the optical axis; the object-side surface S9 and S10 of lens L5 are both convex near the optical axis; the object-side surface S11 and S12 of lens L6 are both concave near the optical axis; and the object-side surface S13 and S14 of lens L7 are both convex near the optical axis. Lenses L5 and L6 are cemented together, and the image-side surface of lens L5 and the object-side surface of lens L6 can be considered as a single surface.

[0173] Specifically, taking the focal length F = 3.92289 mm, the aperture number FNO = 1.64, and the maximum field of view FOV = 139° of the optical lens 100 as examples, other parameters of the optical lens 100 are given in Table 9 below. The definitions of each parameter can be derived from the description of the aforementioned embodiments and will not be repeated here. Furthermore, the refractive index, Abbe number, etc., in Table 9 are obtained at a reference wavelength of 587.5618 nm, and the focal length is obtained at a reference wavelength of 558 nm. In addition, regarding the correspondence between the surface numbers of each lens and the object-side and image-side surfaces of each lens, please refer to the description in the aforementioned Embodiment 1, which will not be repeated here.

[0174] Table 9

[0175]

[0176] Table 10 gives the higher-order coefficients that can be used for each aspherical mirror surface of the third lens L3 and the seventh lens L7 in Example 5, wherein each aspherical surface shape can be defined by the formula given in Example 1.

[0177] Table 10

[0178]

[0179] Please see Figure 10 ,Depend on Figure 10 As can be seen from (A) the spherical aberration diagram, (B) the ray astigmatism diagram, and (C) the distortion diagram, the spherical aberration, astigmatism, and distortion of the optical lens 100 are all well controlled, thus the optical lens 100 of this embodiment has good imaging quality. Furthermore, regarding... Figure 8 (A) Figure 8 (B) and Figure 8 The wavelengths corresponding to the curves in (C) can be found in Example 1. Figure 2 (A) Figure 2 (B) Figure 2 The content described in (C) will not be repeated here.

[0180] Example 6

[0181] Figure 11This is a schematic diagram of the structure of the optical lens 100 disclosed in Embodiment 5 of this application. The optical lens 100 includes a first lens L1, a second lens L2, a third lens L3, an aperture stop 102, a fourth lens L4, a fifth lens L5, a sixth lens L6, a seventh lens L7, a filter 110, and a protective glass 120, arranged sequentially along the optical axis from the object side to the image side. Specifically, the object side S1 of the first lens L1 is convex near the optical axis, and the image side S2 of the first lens L1 is concave near the optical axis; the object side S3 of the second lens L2 is concave near the optical axis, and the image side S4 of the second lens L2 is convex near the optical axis; the object side S5 of the third lens L3 is convex near the optical axis, and the image side S6 of the third lens L3 is concave near the optical axis; the object side S7 of the fourth lens L4 is convex near the optical axis, and the... The image-side surface S8 of lens L4 is convex near the optical axis; the object-side surface S9 and S10 of lens L5 are both convex near the optical axis; the object-side surface S11 and S12 of lens L6 are both concave near the optical axis; and the object-side surface S13 and S14 of lens L7 are both convex near the optical axis. Lenses L5 and L6 are cemented together, and the image-side surface of lens L5 and the object-side surface of lens L6 can be considered as a single surface.

[0182] Specifically, taking the optical lens 100 with a focal length F = 4.02221 mm, an aperture number FNO = 1.60, and a maximum field of view (FOV) of 130° as an example, other parameters of the optical lens 100 are given in Table 11 below. The definitions of each parameter can be derived from the description of the aforementioned embodiments and will not be repeated here. Furthermore, the refractive index, Abbe number, etc., in Table 11 are obtained at a reference wavelength of 587.5618 nm, and the focal length is obtained at a reference wavelength of 558 nm. In addition, regarding the correspondence between the surface numbers of each lens and the object-side and image-side surfaces of each lens, please refer to the description in the aforementioned Embodiment 1, which will not be repeated here.

[0183] Table 11

[0184]

[0185] Table 12 gives the higher-order coefficients that can be used for each aspherical mirror surface of the third lens L3 and the seventh lens L7 in Example 6, wherein each aspherical surface shape can be defined by the formula given in Example 1.

[0186] Table 12

[0187]

[0188]

[0189] Please see Figure 12 ,Depend on Figure 12 As can be seen from (A) the spherical aberration diagram, (B) the ray astigmatism diagram, and (C) the distortion diagram, the spherical aberration, astigmatism, and distortion of the optical lens 100 are all well controlled, thus the optical lens 100 of this embodiment has good imaging quality. Furthermore, regarding... Figure 12 (A) Figure 12 (B) and Figure 12 The wavelengths corresponding to the curves in (C) can be found in Example 1. Figure 2 (A) Figure 2 (B) Figure 2 The content described in (C) will not be repeated here.

[0190] Example 7

[0191] Figure 13 This is a schematic diagram of the structure of the optical lens 100 disclosed in Embodiment 7 of this application. The optical lens 100 includes a first lens L1, a second lens L2, a third lens L3, an aperture stop 102, a fourth lens L4, a fifth lens L5, a sixth lens L6, a seventh lens L7, a filter 110, and a protective glass 120, arranged sequentially along the optical axis from the object side to the image side. Specifically, the object side S1 of the first lens L1 is convex near the optical axis, and the image side S2 of the first lens L1 is concave near the optical axis; the object side S3 of the second lens L2 is concave near the optical axis, and the image side S4 of the second lens L2 is convex near the optical axis; the object side S5 of the third lens L3 is convex near the optical axis, and the image side S6 of the third lens L3 is concave near the optical axis; the object side S7 of the fourth lens L4 is convex near the optical axis, and the... The image-side surface S8 of lens L4 is convex near the optical axis; the object-side surface S9 and S10 of lens L5 are both convex near the optical axis; the object-side surface S11 and S12 of lens L6 are both concave near the optical axis; and the object-side surface S13 and S14 of lens L7 are both convex near the optical axis. Lenses L5 and L6 are cemented together, and the image-side surface of lens L5 and the object-side surface of lens L6 can be considered as a single surface.

[0192] Specifically, taking the optical lens 100 with a focal length F = 3.9266mm, an aperture number FNO = 1.70, and a maximum field of view (FOV) of 135° as an example, other parameters of the optical lens 100 are given in Table 9 below. The definitions of each parameter can be derived from the description of the aforementioned embodiments and will not be repeated here. Furthermore, the refractive index, Abbe number, etc., in Table 13 are obtained at a reference wavelength of 587.5618nm, and the focal length is obtained at a reference wavelength of 558nm. In addition, regarding the correspondence between the surface numbers of each lens and the object-side and image-side surfaces of each lens, please refer to the description in the aforementioned Embodiment 1, which will not be repeated here.

[0193] Table 13

[0194]

[0195]

[0196] Table 14 gives the higher-order coefficients that can be used for each aspherical mirror surface of the third lens L3 and the seventh lens L7 in Example 7, wherein each aspherical surface shape can be defined by the formula given in Example 1.

[0197] Table 14

[0198]

[0199] Please see Figure 14 ,Depend on Figure 14 As can be seen from (A) the spherical aberration diagram, (B) the ray astigmatism diagram, and (C) the distortion diagram, the spherical aberration, astigmatism, and distortion of the optical lens 100 are all well controlled, thus the optical lens 100 of this embodiment has good imaging quality. Furthermore, regarding... Figure 14 (A) Figure 14 (B) and Figure 14 The wavelengths corresponding to the curves in (C) can be found in Example 1. Figure 2 (A) Figure 2 (B) Figure 2 The content described in (C) will not be repeated here.

[0200] Please refer to Table 15, which is a summary of the ratios of the various relationships in Embodiments 1 to 7 of this application.

[0201] Table 15

[0202]

[0203]

[0204]

[0205] Please see Figure 15 This application also discloses a camera module 200, which includes an image sensor 201 and an optical lens 100 as described in any of the embodiments 1 to 7 above. The image sensor 201 is disposed on the image side of the optical lens 100. Specifically, the photosensitive surface of the image sensor 201 is located on the imaging surface 101 of the optical lens 100, and the light rays of an object passing through the lens and incident on the photosensitive surface 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 a separate lens. It is understood that the camera module 200 with the above-described optical lens 100 has all the technical effects of the optical lens 100, that is, the camera module 200 can meet the requirements of a large field of view, high relative illumination, and miniaturized design. Since the above-mentioned technical effects have been described in detail in the embodiments of optical lens 100, they will not be repeated here.

[0206] This application also discloses a terminal device 300, which includes a housing 301 and the aforementioned camera module 200, with the camera module 200 disposed within the housing 301. The terminal device 300 may include, but is not limited to, mobile phones, tablets, laptops, smartwatches, in-vehicle devices, drones, and surveillance cameras. Please refer to [link / reference]. Figure 16 Taking the terminal device 300 as a vehicle as an example, the housing 301 can be the vehicle body, and the camera module 200 can be installed on the vehicle body, for example, inside or outside the vehicle body.

[0207] It is understood that the terminal device 300 with the aforementioned camera module 200 also possesses all the technical effects of the aforementioned optical lens 100. That is, the terminal device 300 can meet the requirements of a large field of view, high relative illumination, and miniaturized design. Since the aforementioned technical effects have been described in detail in the embodiments of the optical lens 100, they will not be repeated here.

[0208] The optical lens, camera module, and terminal device disclosed in the embodiments of this application have been described in detail above. Specific examples have been used to illustrate the principles and implementation methods of this application. The description of the above embodiments is only for the purpose of helping to understand the optical lens, camera module, and terminal device of this application and their core ideas. At the same time, for those skilled in the art, there will be changes in the specific implementation methods and application scope based on the ideas of this application. Therefore, the content of this specification should not be construed as a limitation of this application.

Claims

1. An optical lens, characterized in that, There are a total of seven lenses with refractive power, including a first lens, a second lens, a third lens, a fourth lens, a fifth lens, a sixth lens, and a seventh lens arranged sequentially along the optical axis from the object side to the image side; The first lens has negative refractive power, the object side of the first lens is convex near the optical axis, and the image side of the first lens is concave near the optical axis. The second lens has negative refractive power, the object side of the second lens is concave near the optical axis, and the image side of the second lens is convex near the optical axis; The third lens has positive refractive power, the object side of the third lens is convex near the optical axis, and the image side of the third lens is concave near the optical axis. The fourth lens has positive refractive power, and both the object-side and image-side surfaces of the fourth lens are convex near the optical axis. The fifth lens has positive refractive power, and both the object-side and image-side surfaces of the fifth lens are convex near the optical axis. The sixth lens has negative refractive power, and both the object-side and image-side surfaces of the sixth lens are concave near the optical axis. The seventh lens has positive refractive power, and the object side of the seventh lens is convex near the optical axis; The optical lens satisfies the following relationship: 130°≤FOV≤140° and 1.6≤FNO≤1.7 and 2.0≤F3 / F4≤2.9; Wherein, FOV is the maximum field of view of the optical lens, FNO is the aperture number of the optical lens, F3 is the focal length of the third lens, and F4 is the focal length of the fourth lens.

2. The optical lens according to claim 1, characterized in that, The optical lens satisfies the following relationship: 8.0≤TTL / F≤8.2, and / or, 0.82≤F / IMGH≤0.88, and / or, 79°≤FOV / FNO≤85°; Wherein, TTL is the distance on the optical axis from the object side of the first lens to the imaging surface of the optical lens, F is the focal length of the optical lens, and IMGH is half the image height corresponding to the maximum field of view of the optical lens.

3. The optical lens according to claim 1, characterized in that, The optical lens satisfies the following relationship: 1.8≤F4 / F5≤2.1, and / or, 6.0≤F3 / F≤7.5; Wherein, F5 is the focal length of the fifth 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 relationship: -5.0≤R8 / F≤-3.5, and / or, 2.5≤F4 / CT4≤3.2, and / or, 1.4≤CT4 / ET4≤1.55; Wherein, R8 is the radius of curvature of the image side of the fourth lens at the optical axis, F is the focal length of the optical lens, CT4 is the thickness of the fourth lens on the optical axis, and ET4 is the distance from the maximum effective aperture of the object side of the fourth lens to the maximum effective aperture of the image side of the fourth lens along the optical axis.

5. The optical lens according to claim 1, characterized in that, The image-side surface of the fifth lens is cemented to the object-side surface of the sixth lens, and the optical lens satisfies the following relationship: -1.2mm -1 ≤(Vd5-Vd6) / F56≤-0.6mm -1 And / or, -6.5≤F123 / F≤-3.5, and / or, -15≤F56 / F≤-8.0; Wherein, Vd5 is the Abbe number of the fifth lens, Vd6 is the Abbe number of the sixth lens, F56 is the combined focal length of the fifth and sixth lenses, F123 is the combined focal length of the first, second, and third lenses, and F is the focal length of the optical lens.

6. The optical lens according to claim 1, characterized in that, The optical lens satisfies the following relationship: 0.5≤(d34-d45) / d34≤0.9, and / or, 3.5≤∑CT / ∑AT≤3.9, and / or, 4.2≤TTL / CTMAX≤4.6; Wherein, d34 is the distance on the optical axis between the image-side surface of the third lens and the object-side surface of the fourth lens, d45 is the distance on the optical axis between the image-side surface of the fourth lens and the object-side surface of the fifth lens, ∑CT is the sum of the thicknesses on the optical axis of all lenses from the first lens to the seventh lens, ∑AT is the sum of the air gaps between two adjacent lenses from the first lens to the seventh 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, and CTMAX is the maximum value of the thickness on the optical axis among the first lens to the seventh lens.

7. The optical lens according to claim 1, characterized in that, The optical lens satisfies the following relationship: 0.6≤R5 / R6≤0.8, and / or, 1.2≤CT7 / ET7≤1.4, and / or, 1.6≤SD1 / SD14≤1.75; Wherein, R5 is the radius of curvature of the object side of the third lens at the optical axis, R6 is the radius of curvature of the image side of the third lens at the optical axis, CT7 is the thickness of the seventh lens on the optical axis, ET7 is the distance from the maximum effective aperture of the object side of the seventh lens to the maximum effective aperture of the image side of the seventh lens along the optical axis, SD1 is the maximum effective half-aperture of the object side of the first lens, and SD14 is the maximum effective half-aperture of the image side of the seventh lens.

8. The optical lens according to claim 1, characterized in that, The optical lens satisfies the following relationship: 1.8≤F*tan(FOV / 2) / TTL≤2.3, and / or, 112°≤FOV*F / IMGH≤119°, and / or, -1.009°≤(FOV*F) / (IMGH-FOV*F)≤-1.004°; Where F is the focal length of the optical lens, TTL is the distance on the optical axis from the object side of the first lens to the imaging surface of the optical lens, and IMGH is half the image height corresponding to the maximum field of view of the optical lens.

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

10. A terminal device, characterized in that, Includes the camera module as described in claim 9.

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