Optical lens, camera module and terminal device

Abstract

This application discloses an optical lens, a camera module, and a terminal device, comprising seven lenses with refractive power. The first lens has negative refractive power, with its object-side and image-side surfaces being convex and concave near the optical axis, respectively. The second lens has negative refractive power, with its object-side and image-side surfaces being concave and convex near the optical axis, respectively. The third lens has positive refractive power, with its object-side and image-side surfaces being convex and concave near the optical axis, respectively. The fourth lens has positive refractive power, with both its object-side and image-side surfaces being convex near the optical axis. The fifth lens has positive refractive power, with both its object-side and image-side surfaces being convex near the optical axis. The sixth lens has negative refractive power, with both its object-side and image-side surfaces being concave near the optical axis. The seventh lens has positive refractive power, with its object-side and image-side surfaces being convex and concave near the optical axis. The optical lens satisfies the following relationships: 150deg≤FOV≤160deg and 1.4≤FNO≤1.55.

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 advancement of autonomous driving technology, the performance requirements for forward-looking optical lenses are also constantly increasing, especially in terms of achieving high resolution, wide field of view, and low distortion. At the same time, with the increasing demand for nighttime driving, the performance of automotive lenses in low-light environments (such as at night or in rainy weather) has become particularly important.

[0003] While current optical lenses have large apertures, they often struggle to maintain image sharpness while keeping high resolution, and they also cannot achieve both miniaturization and imaging performance in low-light environments. Summary of the Invention

[0004] This application provides an optical lens, a camera module, and a terminal device that can meet the requirements of a large field of view, a large aperture, and high relative illumination while also taking into account the need for miniaturization.

[0005] To achieve the above objectives, in a first aspect, this application discloses an optical lens, comprising:

[0006] 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;

[0007] 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.

[0008] 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;

[0009] 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.

[0010] 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.

[0011] 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.

[0012] 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.

[0013] The seventh lens has positive refractive power, the object side of the seventh lens is convex near the optical axis, and the image side of the seventh lens is concave near the optical axis.

[0014] The optical lens satisfies the following relationship:

[0015] 150deg≤FOV≤160deg and 1.4≤FNO≤1.55;

[0016] Wherein, FOV is the maximum field of view of the optical lens, and FNO is the aperture number of the optical lens.

[0017] In the optical lens provided in this application, in order to meet the requirements of large aperture, large field of view, high relative illumination, and miniaturization, the first lens is configured to have negative refractive power, and its object-side and image-side surfaces are convex and concave near the optical axis, respectively. This facilitates the coupling of more light into the optical lens, effectively increasing the field of view, improving the relative illumination at the edge of the optical lens, and effectively avoiding vignetting. The second lens is configured to have negative refractive power, and its object-side and image-side surfaces are concave and convex near the optical axis, respectively. This allows light passing through the first lens to enter the optical lens more smoothly. The third lens is configured to have positive refractive power, and its object-side and image-side surfaces are convex and concave near the optical axis, respectively. This facilitates the collection and compression of more incident light, allowing the incident light to enter the fourth lens more smoothly. The fourth lens is configured to have positive refractive power, and its object-side and image-side surfaces are both convex and concave near the optical axis. The convex design helps reduce the incident angle of light after passing through the aperture stop, allowing more light to couple into the optical lens and improving the relative illumination of the lens. The fifth lens is designed with positive refractive power, and its object-side and image-side surfaces near the optical axis are convex, which helps to gather light and reduce the overall length of the optical lens, thus achieving a miniaturized design. The sixth lens is designed with negative refractive power, and its object-side and image-side surfaces near the optical axis are concave. Combined with the positive refractive power of the fifth lens, it helps to eliminate chromatic aberration, balance phase aberration, and improve resolution. It can also effectively reduce the sensitivity of the optical lens, thereby effectively improving the image quality of the optical lens. The seventh lens is designed with positive refractive power, and its object-side and image-side surfaces near the optical axis are convex and concave respectively. It can effectively correct the distortion of the edge field of view and also effectively improve the image quality of the optical lens.

[0018] The optical lens satisfies the relationship 150deg≤FOV≤160deg. 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.

[0019] The optical lens satisfies the relationship 1.4≤FNO≤1.55. By constraining the aperture number of the optical lens, the light transmission capability of the optical lens can be improved, resulting in higher relative illumination. This allows the optical lens to have good image quality even in dark environments such as at night or on rainy days, meeting the requirements of large aperture and high resolution.

[0020] As an optional implementation, the optical lens satisfies the following relationship:

[0021] 99deg≤FOV / FNO≤114deg, and / or, 6.5≤TTL / IMGH≤7.7, and / or, 0.8≤BFL / F≤1.1;

[0022] Wherein, TTL is the distance from the object side of the first lens to the imaging surface of the optical lens in the optical axis direction, IMGH is half the image height corresponding to the maximum field of view of the optical lens, BFL is the distance from the image side of the seventh lens to the imaging surface of the optical lens in the optical axis direction, and F is the focal length of the optical lens.

[0023] The optical lens satisfies the relationship 99deg≤FOV / FNO≤114deg. By reasonably controlling the relationship between the field of view and 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 having a large aperture, high relative illumination, and small distortion.

[0024] The optical lens satisfies the relationship 6.5≤TTL / IMGH≤7.7. By controlling the ratio of the total length of the optical lens to the half-image height of the optical lens, it is beneficial to control the total length of the optical lens, which in turn facilitates the miniaturization design of the optical lens.

[0025] Optical lenses satisfy the relationship 0.8 ≤ BFL / F ≤ 1.1. By controlling the ratio of the back focal length to the focal length of the optical lens, it is beneficial to reasonably control the back focal length and ensure the matching between the optical lens and the image sensor. When the optical lens exceeds the upper limit of the above relationship, the back focal length of the optical lens is too long, which is not conducive to achieving a large image plane effect.

[0026] As an optional implementation, the optical lens satisfies the following relationship:

[0027] -0.25≤(R3-R4) / (R3+R4)≤-0.15, and / or, 1.8≤SD1 / SD3≤2.1, and / or, 2≤SAGS2 / SAGS1≤4.5;

[0028] Wherein, R3 is the radius of curvature of the object side of the second lens at the optical axis, R4 is the radius of curvature of the image side of the second lens at the optical axis, SD1 is half of the maximum effective aperture of the object side of the first lens, SD3 is half of the maximum effective aperture of the object side of the second lens, SAGS2 is the distance from the intersection of the image side of the first lens and the optical axis to the maximum effective aperture of the image side of the first lens on the optical axis, and SAGS1 is the distance from the intersection of the object side of the first lens and the optical axis to the maximum effective aperture of the object side of the first lens on the optical axis.

[0029] The optical lens satisfies the relationship -0.25 ≤ (R3 - R4) / (R3 + R4) ≤ -0.15. Since the radius of curvature of the second lens affects its curvature, this relationship effectively corrects edge field-of-view aberrations, suppresses astigmatism, and reduces the angle at which the principal rays from the peripheral viewpoints strike the imaging plane of the lens, thereby improving the image quality. However, exceeding this range hinders aberration correction.

[0030] The optical lens satisfies the relationship 1.8≤SD1 / SD3≤2.1, which allows the second lens to have a small aperture characteristic, effectively converging the light from the first lens and allowing the light to enter the imaging plane of the optical lens better.

[0031] The optical lens satisfies the relationship 2≤SAGS2 / SAGS1≤4.5, which is beneficial for achieving the characteristic of a small front diameter of the optical lens.

[0032] As an optional implementation, the optical lens satisfies the following relationship:

[0033] 4≤F3 / F≤5.5, and / or, 4≤F5 / F≤6.2, and / or, 3.9≤F7 / F≤7;

[0034] Wherein, F3 is the focal length of the third lens, F5 is the focal length of the fifth lens, F7 is the focal length of the seventh lens, and F is the focal length of the optical lens.

[0035] By satisfying the above formula, the optical power distribution of each lens can be made uniform and reasonable, thereby making aberrations easy to correct and the image quality of the optical lens good.

[0036] As an optional implementation, the optical lens satisfies the following relationship:

[0037] 0.1mm-1≤|(Vd5-Vd6) / F56|≤0.9mm-1, and / or, 0.9≤SD8 / SD9≤1.1, and / or, 1≤SD13 / SD12≤1.05;

[0038] 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, SD8 is half the maximum effective aperture of the image side of the fourth lens, SD9 is half the maximum effective aperture of the object side of the fifth lens, SD13 is half the maximum effective aperture of the object side of the seventh lens, and SD12 is half the maximum effective aperture of the image side of the sixth lens.

[0039] The optical lens satisfies the relation 0.1mm. -1 ≤|(Vd5-Vd6) / F56|≤0.9mm -1 By reasonably setting the ratio of the Abbe number difference between the sixth and fifth lenses to the effective focal length of the combination of the sixth and fifth 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.

[0040] The optical lens satisfies the relationship 0.9≤SD8 / SD9≤1.1. By reasonably allocating the maximum effective aperture of the fourth and fifth lenses, it is beneficial to reduce the step difference between the fourth and fifth lenses, so that light can enter the fifth lens more smoothly from the fourth lens.

[0041] The optical lens satisfies the relationship 1≤SD13 / SD12≤1.05. By reasonably allocating the maximum effective aperture of the seventh lens and the sixth lens, it is beneficial to reduce the step difference between the sixth lens and the seventh lens, so that light can enter the seventh lens more smoothly from the sixth lens.

[0042] As an optional implementation, the optical lens satisfies the following relationship:

[0043] 7≤TTL / (CT6+CT7)≤11, and / or, 0.4≤CT3 / CT34≤3, and / or, 1.4≤CT7 / CT67≤2.7;

[0044] Wherein, TTL is the distance from the object side of the first lens to the imaging surface of the optical lens along the optical axis, CT6 is the thickness of the sixth lens along the optical axis, CT7 is the thickness of the seventh lens along the optical axis, CT3 is the thickness of the third lens along the optical axis, CT34 is the distance from the image side of the third lens to the object side of the fourth lens along the optical axis, and CT67 is the distance from the image side of the sixth lens to the object side of the seventh lens along the optical axis.

[0045] The optical lens satisfies the relationship 7≤TTL / (CT6+CT7)≤11. By controlling the ratio of the total length of the optical lens to the thickness of the sixth and seventh lenses along the optical axis, it is beneficial to the rational allocation of the entire optical lens space, making the structure of the optical lens more compact. When the optical lens exceeds the upper limit of the above relationship, the total length of the optical lens is too long, which is not conducive to a compact structure; when the optical lens is below the lower limit of the above relationship, the sixth and seventh lenses are too thick, increasing the risk of light bending and increasing the sensitivity of inter-lens eccentricity, which is detrimental to the assembly of the optical lens.

[0046] The optical lens satisfies the relationship 0.4≤CT3 / CT34≤3. By reasonably controlling the thickness of the third lens on the optical axis and the ratio of the distance between the third lens and the fourth lens on the optical axis, it is beneficial to reduce the total length of the optical lens and realize the miniaturization of the optical lens.

[0047] The optical lens satisfies the relationship 1.4≤CT7 / CT67≤2.7. By reasonably controlling the ratio of the distance on the optical axis between the image side of the sixth lens and the object side of the seventh lens, it is beneficial to reduce the overall length of the optical lens and realize the miniaturization of the optical lens.

[0048] As an optional implementation, the optical lens satisfies the following relationship:

[0049] 5≤R1 / R2≤13, and / or, -1.2≤R9 / R10≤-0.8, and / or, 0.3≤CT6 / ET6≤0.5;

[0050] 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, R9 is the radius of curvature of the object side of the fifth lens at the optical axis, R10 is the radius of curvature of the image side of the fifth lens at the optical axis, CT6 is the thickness of the sixth lens on the optical axis, and ET6 is the distance from the maximum effective aperture of the object side of the sixth lens to the maximum effective aperture of the image side of the sixth lens on the optical axis.

[0051] The optical lens satisfies the relationships 5≤R1 / R2≤13 and -1.2≤R9 / R10≤-0.8. By rationally matching the ratios of the object-side and image-side radii of curvature of each lens at the optical axis, the surface shape differences of each lens are reasonably set. This facilitates the control of the shape of each lens, corrects its own aberrations, and improves image quality. Furthermore, it allows for easier control of the curvature of each lens surface, reducing manufacturing difficulty.

[0052] The optical lens satisfies the relationship 0.3≤CT6 / ET6≤0.5. By controlling the ratio of the thickness of the sixth lens along the optical axis to its edge thickness, not only can the higher-order aberrations generated by the optical lens be effectively balanced, but the field curvature adjustment of the sixth lens is also facilitated, thereby improving the imaging quality of the optical lens. At the same time, a suitable edge thickness can also provide sufficient mechanical strength for the sixth lens, thereby reducing the difficulty of manufacturing.

[0053] As an optional implementation, the optical lens satisfies the following relationship:

[0054] 34mm≤TTL*IMGH / F≤40mm, and / or, 0.22≤SD1 / TTL≤0.28, and / or, 3.2≤F*tan(FOV / 2) / IMGH≤5;

[0055] Wherein, TTL is the distance from the object side of the first lens to the imaging surface of the optical lens in the optical axis direction, IMGH is half the image height corresponding to the maximum field of view of the optical lens, F is the focal length of the optical lens, SD1 is half the maximum effective aperture of the object side of the first lens, and tan(FOV / 2) is the tangent of half the maximum field of view of the optical lens.

[0056] The optical lens meets the relationship 34mm≤TTL*IMGH / F≤40mm, which enables the optical lens to meet the requirements of large target surfaces while adapting to large imaging surfaces and miniaturizing the optical lens.

[0057] The optical lens satisfies the relationship 0.22≤SD1 / TTL≤0.28. Under a certain total length of optical lens, the head size and volume of the optical lens are limited by controlling the ratio of the maximum effective half-aperture of the object side of the first lens to the total optical length, so as to achieve miniaturization of the optical lens.

[0058] The optical lens satisfies the relationship 3.2≤F*tan(FOV / 2) / IMGH≤5, which ensures that the optical lens has high pixel count and good wide-angle shooting effect. When the length of the diagonal of the effective pixel area on the imaging plane and the field of view in the diagonal direction of the optical lens exceed the range of the above relationship, it is not conducive to the wide-angle and high-pixel characteristics of the camera module.

[0059] Secondly, this application also discloses a camera module, which includes an image sensor and an optical lens as described in the first aspect above, wherein the image sensor is disposed on the image side of the optical lens.

[0060] Thirdly, this application also discloses a terminal device, including a housing and a camera module as described in the second aspect above, the camera module being disposed in the housing.

[0061] Compared with the prior art, the beneficial effects of this application are:

[0062] In the optical lens provided in this application, in order to meet the requirements of large aperture, large field of view, high relative illumination, and miniaturization, the first lens is configured to have negative refractive power, and its object-side and image-side surfaces are convex and concave near the optical axis, respectively. This facilitates the coupling of more light into the optical lens, effectively increasing the field of view, improving the relative illumination at the edge of the optical lens, and effectively avoiding vignetting. The second lens is configured to have negative refractive power, and its object-side and image-side surfaces are concave and convex near the optical axis, respectively. This allows light passing through the first lens to enter the optical lens more smoothly. The third lens is configured to have positive refractive power, and its object-side and image-side surfaces are convex and concave near the optical axis, respectively. This facilitates the collection and compression of more incident light, allowing the incident light to enter the fourth lens more smoothly. The fourth lens is configured to have positive refractive power, and its object-side and image-side surfaces are both convex and concave near the optical axis. The convex design helps reduce the incident angle of light after passing through the aperture stop, allowing more light to couple into the optical lens and improving the relative illumination of the lens. The fifth lens is designed with positive refractive power, and its object-side and image-side surfaces near the optical axis are convex, which helps to gather light and reduce the overall length of the optical lens, thus achieving a miniaturized design. The sixth lens is designed with negative refractive power, and its object-side and image-side surfaces near the optical axis are concave. Combined with the positive refractive power of the fifth lens, it helps to eliminate chromatic aberration, balance phase aberration, and improve resolution. It can also effectively reduce the sensitivity of the optical lens, thereby effectively improving the image quality of the optical lens. The seventh lens is designed with positive refractive power, and its object-side and image-side surfaces near the optical axis are convex and concave respectively. It can effectively correct the distortion of the edge field of view and also effectively improve the image quality of the optical lens.

[0063] The optical lens satisfies the relationship 150deg≤FOV≤160deg. 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.

[0064] The optical lens satisfies the relationship 1.4≤FNO≤1.55. By constraining the aperture number of the optical lens, the light transmission capability of the optical lens can be improved, resulting in higher relative illumination. This allows the optical lens to have good image quality even in dark environments such as at night or on rainy days, meeting the requirements of large aperture and high resolution. Attached Figure Description

[0065] 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.

[0066] Figure 1 This is a schematic diagram of the structure of the optical lens disclosed in Embodiment 1 of this application;

[0067] 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;

[0068] Figure 3 This is a schematic diagram of the structure of the optical lens disclosed in Embodiment 2 of this application;

[0069] 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;

[0070] Figure 5 This is a schematic diagram of the structure of the optical lens disclosed in Embodiment 3 of this application;

[0071] 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;

[0072] Figure 7 This is a schematic diagram of the structure of the optical lens disclosed in Embodiment 4 of this application;

[0073] 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;

[0074] Figure 9 This is a schematic diagram of the structure of the optical lens disclosed in Embodiment 5 of this application;

[0075] 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;

[0076] Figure 11 This is a schematic diagram of the camera module disclosed in this application;

[0077] Figure 12 This is a structural diagram of the terminal device disclosed in this application when it is a car. Detailed Implementation

[0078] 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.

[0079] 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.

[0080] 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.

[0081] 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.

[0082] 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.

[0083] The technical solution of this application will be further described below with reference to the embodiments and accompanying drawings.

[0084] 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. During imaging, light rays enter 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 sequentially from the object side of the first lens L1, and are finally imaged on the imaging plane 101 of the optical lens 100.

[0085] In some embodiments, 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.

[0086] In some embodiments, the object-side surface S1 of the first lens L1 is convex near the optical axis, and the image-side surface S2 of the first lens L1 is concave near the optical axis; the object-side surface S3 of the second lens L2 is concave near the optical axis, and the image-side surface S4 of the second lens L2 is convex near the optical axis; the object-side surface S5 of the third lens L3 is convex near the optical axis, and the image-side surface S6 of the third lens L3 is convex near the optical axis; the object-side surface S7 of the fourth lens L4 is convex near the optical axis. The image-side surface S8 of the fourth lens L4 is convex near the optical axis; the object-side surface S9 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 concave near the optical axis.

[0087] 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.

[0088] Optionally, the first lens L1, the second lens L2, the third lens L3, the fourth lens L4, the fifth lens L5, and the sixth lens L6 can be spherical lenses, and the seventh lens L7 can be an aspherical lens. By combining spherical and aspherical lenses, higher-order aberrations can be improved, thereby enhancing the imaging quality of the optical lens 100.

[0089] In some embodiments, the optical lens 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.

[0090] 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 101 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.

[0091] 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 201 during subsequent assembly, thereby playing a protective role.

[0092] In one embodiment, the optical lens 100 satisfies the relationship 150deg≤FOV≤160deg; where FOV is the maximum field of view of the optical lens. By reasonably setting the maximum field of view of the optical lens 100, a sufficient field of view can be provided to meet the large field of view requirement of the optical lens 100.

[0093] In one embodiment, the optical lens 100 satisfies the relationship 1.4 ≤ FNO ≤ 1.55, where FNO is the aperture number of the optical lens. By constraining the aperture number of the optical lens 100, the light transmission capability of the optical lens 100 can be improved, resulting in higher relative illumination and good image quality even in darker environments such as at night or on rainy days, thus meeting the requirements of a large aperture and high resolution.

[0094] In one embodiment, the optical lens 100 satisfies the relationship 99deg≤FOV / FNO≤114deg; where FOV is the maximum field of view of the optical lens 100, and FNO is the aperture number of the optical lens 100. By reasonably controlling the relationship between the field of view and the aperture number of the optical lens 100, a reasonable field of view and aperture number can be provided for the optical lens 100, which can take into account both design difficulty and 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, satisfying the characteristics of the optical lens 100 having a large aperture, high relative illumination, and small distortion.

[0095] In one embodiment, the optical lens 100 satisfies the relationship 6.5 ≤ TTL / IMGH ≤ 7.7; where TTL is the total length of the optical lens 100, and IMGH is half the image height corresponding to the maximum field of view of the optical lens 100. By controlling the ratio of the total length of the optical lens 100 to its half-image height, it is beneficial to control the total length of the optical lens 100, thereby facilitating the miniaturization design of the optical lens 100.

[0096] In one embodiment, the optical lens 100 satisfies the relationship 0.8 ≤ BFL / F ≤ 1.1; where BFL is the distance along the optical axis from the image-side surface S14 of the seventh lens L7 to the imaging surface 101 of the optical lens 100, and F is the focal length of the optical lens 100. By controlling the ratio of the back focal length to the focal length of the optical lens 100, it is beneficial to reasonably control the back focal length and ensure the matching between the optical lens 100 and the image sensor 201. When the optical lens 100 exceeds the upper limit of the above relationship, the back focal length of the optical lens 100 is too long, which is not conducive to achieving a large image plane effect.

[0097] In one embodiment, the optical lens 100 satisfies the relationship -0.25 ≤ (R3 - R4) / (R3 + R4) ≤ -0.15; where R3 is the radius of curvature of the object-side surface of the second lens L2 at the optical axis, and R4 is the radius of curvature of the image-side surface of the second lens L2 at the optical axis. Since the radius of curvature of the second lens L2 affects its curvature, the aforementioned relationship effectively corrects edge field-of-view aberrations of the optical lens 100, suppresses astigmatism, and reduces the angle at which the principal rays from the peripheral viewing angles are incident on the imaging plane 101 of the optical lens 100, thereby improving the imaging quality of the optical lens 100. When the range of this relationship is exceeded, it is detrimental to the correction of aberrations in the optical lens 100.

[0098] In one embodiment, the optical lens 100 satisfies the relationship 1.8 ≤ SD1 / SD3 ≤ 2.1; where SD1 is half the maximum effective aperture of the object-side surface S11 of the first lens L1, and SD3 is half the maximum effective aperture of the object-side surface S3 of the second lens L2. This allows the second lens L2 to have a small aperture, effectively converging the light rays from the first lens L1 and allowing the light to enter the imaging surface 101 of the optical lens 100 more effectively.

[0099] In one embodiment, the optical lens 100 satisfies the relationship 2 ≤ SAGS2 / SAGS1 ≤ 4.5; where SAGS2 is the distance from the intersection of the image-side surface S2 of the first lens L1 and the optical axis to the maximum effective aperture of the image-side surface S2 of the first lens L1 on the optical axis, and SAGS1 is the distance from the intersection of the object-side surface S1 of the first lens L1 and the optical axis to the maximum effective aperture of the object-side surface S1 of the first lens L1 on the optical axis. This configuration is beneficial for achieving a small front aperture in the optical lens 100.

[0100] In one embodiment, the optical lens 100 satisfies the following relationships: -1.9≤F1 / F≤-1.7, -20≤F2 / F≤-10, 4≤F3 / F≤5.5, 4≤F4 / F≤4.2, 4≤F5 / F≤6.2, -4≤F6 / F≤-3, and 3.9≤F7 / F≤7; 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, F4 is the focal length of the fourth lens L4, 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 of each lens can be made uniform and reasonable, thereby making aberrations easy to correct and the image quality of the optical lens 100 good.

[0101] In one embodiment, the optical lens 100 satisfies the following relationships: 5≤R1 / R2≤13, 3≤R6 / R5≤35, -4.5≤R8 / R7≤-2, -1.2≤R9 / R10≤-0.8, -2.5≤R12 / R11≤-1.5, and 2≤R14 / R13≤18; 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, R5 is the radius of curvature of the object-side surface S5 of the third lens L3 at the optical axis, and 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; R12 is the radius of curvature of the image-side surface S12 of the sixth lens L6 at the optical axis; 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 S14 of the seventh lens L7 at the optical axis.

[0102] By rationally matching the ratio between the curvature radii of the object-side and image-side surfaces of each lens at the optical axis, the surface shape differences of each lens are set appropriately. This facilitates control over the shape of each lens, corrects its own aberrations, and improves image quality. Furthermore, it makes it easier to control the curvature of each lens's surface, reducing manufacturing complexity.

[0103] In one embodiment, the optical lens 100 satisfies the relation 0.1mm. -1 ≤|(Vd5-Vd6) / F56|≤0.9mm -1 Where 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 sixth lens L6 and the fifth lens L5 to the combined effective focal length of the sixth lens L6 and the fifth lens L5, the chromatic aberration of the optical lens 100 can be effectively corrected, the authenticity of colors can be restored, and the image quality can be improved.

[0104] In one embodiment, the optical lens 100 satisfies the relationship 0.9 ≤ SD8 / SD9 ≤ 1.1, where SD8 is half the maximum effective aperture of the image-side surface S8 of the fourth lens L4, and SD9 is half the maximum effective aperture of the object-side surface S9 of the fifth lens L5. By rationally allocating the maximum effective apertures of the fourth lens L4 and the fifth lens L5, it is beneficial to reduce the step difference between the fourth lens L4 and the fifth lens L5, allowing light to enter the fifth lens L5 more smoothly from the fourth lens L4.

[0105] In one embodiment, the optical lens 100 satisfies the relationship 1 ≤ SD13 / SD12 ≤ 1.05, where SD13 is half the maximum effective aperture of the object-side surface S13 of the seventh lens L7, and SD12 is half the maximum effective aperture of the image-side surface S12 of the sixth lens L6. By rationally allocating the maximum effective apertures of the seventh lens L7 and the sixth lens L6, it is beneficial to reduce the step difference between the sixth lens L6 and the seventh lens L7, allowing light to enter the seventh lens L7 more smoothly from the sixth lens L6.

[0106] In one embodiment, the optical lens 100 satisfies the relationship 7≤TTL / (CT6+CT7)≤11, where CT6 is the thickness of the sixth lens L6 along the optical axis, and CT7 is the thickness of the seventh lens L7 along the optical axis. By controlling the ratio of the total length of the optical lens 100 to the thicknesses of the sixth lens L6 and the seventh lens L7 along the optical axis, it is beneficial to rationally allocate the space of the entire optical lens 100, making the structure of the optical lens 100 more compact. When the optical lens 100 exceeds the upper limit of the above relationship, the total length of the optical lens 100 is too long, which is not conducive to a compact structure; when the optical lens 100 is below the lower limit of the above relationship, the sixth lens L6 and the seventh lens L7 are too thick, increasing the risk of light bending and increasing the eccentricity sensitivity between the lenses, which is not conducive to the assembly of the optical lens 100.

[0107] In one embodiment, the optical lens 100 satisfies the relationships 0.3≤CT1 / ET1≤0.55, 1.2≤CT3 / ET3≤2, and 0.3≤CT6 / ET6≤0.5; where ET1 is the distance along the optical axis from the maximum effective aperture of the object-side surface S1 of the first lens L1 to the maximum effective aperture of the image-side surface S2 of the first lens L1; ET3 is the distance along the optical axis from the maximum effective aperture of the object-side surface S5 of the third lens L3 to the maximum effective aperture of the image-side surface S6 of the third lens L3; and ET6 is the distance along the optical axis from the maximum effective aperture of the object-side surface S11 of the sixth lens L6 to the maximum effective aperture of the image-side surface S12 of the sixth lens L6. By controlling the ratio of the thickness of the first lens L1, the third lens L3, and the sixth lens L6 along the optical axis to their edge thickness, not only can the advanced aberrations generated by the optical lens 100 be effectively balanced, but the field curvature adjustment of the aforementioned lenses is also facilitated, thereby improving the imaging quality of the optical lens 100. At the same time, a suitable edge thickness can provide the lens with sufficient mechanical strength, thereby reducing the difficulty of processing.

[0108] In one embodiment, the optical lens 100 satisfies the relationship 0.4≤CT3 / CT34≤3, where CT3 is the thickness of the third lens L3 on the optical axis, and CT34 is the distance on the optical axis between the image side S6 of the third lens L3 and the object side S7 of the fourth lens L4. By reasonably controlling the ratio of the thickness of the third lens L3 on the optical axis to the distance between the third lens L3 and the fourth lens L4 on the optical axis, it is beneficial to reduce the total length of the optical lens 100 and realize the miniaturization of the optical lens 100.

[0109] In one embodiment, the optical lens 100 satisfies the relationship 1.4≤CT7 / CT67≤2.7, where CT7 is the thickness of the seventh lens L7 on the optical axis, and CT67 is the distance on the optical axis between the image-side surface S12 of the sixth lens L6 and the object-side surface S13 of the seventh lens L7. By reasonably controlling the ratio of the distance on the optical axis between the image-side surface S12 of the sixth lens L6 and the object-side surface S13 of the seventh lens L7, it is beneficial to reduce the overall length of the optical lens 100 and realize the miniaturization of the optical lens 100.

[0110] In one embodiment, the optical lens 100 satisfies the relationship 34mm≤TTL*IMGH / F≤40mm, which enables the optical lens 100 to simultaneously meet the requirements of a large target surface while adapting to a large imaging surface 101 and miniaturizing the optical lens 100.

[0111] In one embodiment, the optical lens 100 satisfies the relationship 0.22≤SD1 / TTL≤0.28, where SD1 is the maximum effective half-aperture of the object side surface S1 of the first lens L1. Under a certain total length of the optical lens 100, the head size and volume of the optical lens 100 are limited by controlling the ratio of the maximum effective half-aperture of the object side surface S1 of the first lens L1 to the total optical length, so as to achieve miniaturization of the optical lens 100.

[0112] In one embodiment, the optical lens 100 satisfies the relationship 3.2 ≤ F*tan(FOV / 2) / IMGH ≤ 5, where tan(FOV / 2) is the tangent of half the maximum field of view of the optical lens 100, ensuring that the optical lens 100 has high pixel count and good wide-angle shooting effect. When the length of the diagonal of the effective pixel area on the imaging surface 101 and the field of view of the optical lens 100 in the diagonal direction exceed the range of the above relationship, it is not conducive to the wide-angle and high-pixel characteristics of the camera module 200.

[0113] In one embodiment, the optical lens 100 satisfies the relationship 7.4≤TTL / F≤8.8, where TTL is the total length of the optical lens 100 and F is the focal length of the optical lens 100. This allows for reasonable control of the total length and focal length of the optical lens 100, ensuring that the optical lens 100 has a reasonable focal length without resulting in a long total length, which is beneficial for miniaturizing the optical lens 100.

[0114] In one embodiment, the optical lens 100 satisfies the relationship 0.82 ≤ F / IMGH ≤ 0.88. By rationally configuring the ratio of the focal length to the half-image height of the optical lens 100, it is beneficial for the optical lens 100 to meet the requirements of high-definition imaging, and at the same time, it is beneficial for the optical lens 100 to shoot within a large field of view. When the optical lens 100 exceeds the upper limit of the above relationship, the focal length of the optical lens 100 is too long, which is not conducive to the miniaturization of the optical lens 100; when the optical lens 100 is below the lower limit of the above relationship, the focal length of the optical lens 100 is too short, which is not conducive to realizing the telephoto function of the optical lens 100, resulting in insufficient clarity when shooting distant objects and affecting the imaging effect.

[0115] In one embodiment, the optical lens 100 satisfies the relationship 1.6≤SD1 / IMGH≤2.1, which can effectively control the image height of the optical lens 100 and meet the requirements of high pixel count and good image quality of the optical lens 100.

[0116] In one embodiment, the optical lens 100 satisfies the relationship -5≤F1 / CT1≤-2, where F1 is the focal length of the first lens and CT1 is the thickness of the first lens L1 on the optical axis. By reasonably controlling the ratio between the focal length and the thickness of the first lens L1, it is beneficial to reasonably configure the refractive power of the first lens L1 and effectively control the angle at which light enters the first lens L1, thereby facilitating the correction of aberrations.

[0117] In one embodiment, the optical lens 100 satisfies the relationship -20≤F2 / CT2≤-9, where F2 is the focal length of the second lens L2 and CT2 is the thickness of the second lens L2 on the optical axis. Satisfying this relationship allows the refractive power of the second lens L2 to match the refractive power of the first lens L1, correcting spherical aberration and giving the optical lens 100 good imaging quality.

[0118] In one embodiment, the optical lens 100 satisfies the relationship 3≤F3 / CT3≤16, where F3 is the focal length of the third lens L3 and CT3 is the thickness of the third lens L3 on the optical axis. This allows for a reasonable configuration of the refractive power of the third lens L3, effectively controlling the deflection angle of light in the optical lens 100, thereby reducing the sensitivity of the optical lens 100 and improving its resolution.

[0119] In one embodiment, the optical lens 100 satisfies the relationship 3≤F4 / CT4≤7.2, where F4 is the focal length of the fourth lens L4 and CT4 is the thickness of the fourth lens L4 on the optical axis. This effectively controls the deflection angle of light entering the fourth lens L4, thereby reducing the sensitivity of the optical lens 100 and improving image quality.

[0120] In one embodiment, the optical lens 100 satisfies the relationship 6≤F5 / CT5≤8.5, where F5 is the focal length of the fifth lens L5 and CT5 is the thickness of the fifth lens L5 on the optical axis, so that the fifth lens L5 can cooperate with the fourth lens L4 to balance higher-order aberrations and improve the quality of the optical lens 100.

[0121] In one embodiment, the optical lens 100 satisfies the relationship -20≤F6 / CT6≤-9, which makes the refractive power of the sixth lens L6 moderate, and can cooperate with the fifth lens L5 to balance higher-order aberrations and improve the quality of the optical lens 100.

[0122] In one embodiment, the optical lens 100 satisfies the relationship 4.5≤F7 / CT7≤10, where CT7 is the thickness of the seventh lens L7 on the optical axis. By reasonably controlling the relationship between the focal length of the seventh lens L7 and the thickness of the seventh lens L7, the focal length of the seventh lens L7 will not be too large, which is convenient for correcting aberrations. It can also reduce the tolerance sensitivity of the seventh lens L7, reduce the difficulty of the manufacturing process, and help improve the assembly yield of the optical lens 100.

[0123] Example 1

[0124] 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 convex near the optical axis; the object side S7 of the fourth lens L4 is convex near the optical axis. The image-side surface S8 of the fourth lens L4 is convex near the optical axis; the object-side surface S9 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 concave near the optical axis.

[0125] Specifically, taking the effective focal length parameter F = 3.815mm, the aperture number FNO = 1.406, and the maximum field of view FOV = 160deg of the optical lens 100 as examples, 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 S1 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 587.6 nm, and the focal length is obtained at a reference wavelength of 546 nm.

[0126] Table 1

[0127]

[0128]

[0129] In Example 1, the object-side surface S13 and image-side surface S14 of the seventh lens L7 are both aspherical. Therefore, the surface shape x of each aspherical lens can be limited by, but is not limited to, the following aspherical formula:

[0130]

[0131] Where x is the distance vector from the vertex of the aspherical surface at a height h along the optical axis; c is the curvature of the aspherical surface at the optical axis, c = 1 / Y (i.e., the paraxial curvature c is the reciprocal of the radius of curvature Y in Table 1 above); K is the conic coefficient; Ai is the i-th order correction coefficient of the aspherical surface. Table 2 below gives the higher-order coefficients A4, A6, A8, A10, A12, A14, and A16 of the aspherical surface of the seventh lens L7.

[0132] Table 2

[0133]

[0134] 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. Figure 2 Figure (A) shows the spherical aberration diagram of optical lens 100 at wavelengths of 656 nm, 588 nm, 546 nm, 486 nm, and 436 nm. The horizontal axis along the X-axis represents the focus shift in mm, and the vertical axis along the Y-axis represents the normalized field of view. Figure 2 As can be seen from (A) in 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.

[0135] Figure 2 (B) in the figure shows the light astigmatism of the optical lens 100 in Example 1 at a wavelength of 546 nm. The horizontal axis along the X-axis represents the focus shift in mm, and the vertical axis along the Y-axis represents the field of view in degrees. In the astigmatism 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.

[0136] Figure 2(C) in the figure represents the distortion diagram of the optical lens 100 in Example 1 at a wavelength of 546 nm. The horizontal axis along the X-axis represents the distortion, and the vertical axis along the Y-axis represents the field of view, in degrees (deg). Figure 2 As can be seen from (C), at this wavelength, the image distortion caused by the main beam is small, and the distortion of the optical lens 100 is well corrected.

[0137] Example 2

[0138] Figure 3 This is a schematic diagram of the structure of the optical lens 100 disclosed in Embodiment 2 of this application. Specifically, taking the effective focal length parameter F = 3.99mm, the aperture number FNO = 1.50, and the maximum field of view FOV = 150deg of the optical lens 100 as examples, other parameters of the optical lens 100 are given in Table 3 below. The definitions of each parameter can be derived from the description of the foregoing embodiments and will not be repeated here. The refractive index, Abbe number, etc. in Table 3 are all obtained at a reference wavelength of 587.6nm, and the focal length is obtained at a reference wavelength of 546nm. In addition, regarding the correspondence between the surface numbers of each lens and the object side and image side of each lens, please refer to the description in Embodiment 1 above, and it will not be repeated here.

[0139] Table 3

[0140]

[0141]

[0142] Table 4 gives the higher-order coefficients that can be used for each aspherical surface of the seventh lens L7 in Example 2, wherein each aspherical surface shape can be defined by the formula given in Example 1.

[0143] Table 4

[0144]

[0145] Please see Figure 4 ,Depend on Figure 4 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 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.

[0146] Example 3

[0147] Figure 5 This is a schematic diagram of the structure of the optical lens 100 disclosed in Embodiment 3 of this application. Specifically, taking the effective focal length parameter F = 3.778mm, the aperture number FNO = 1.43, and the maximum field of view FOV = 156deg 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 foregoing embodiments and will not be repeated here. The refractive index, Abbe number, etc. in Table 5 are all obtained at a reference wavelength of 587.6nm, and the focal length is obtained at a reference wavelength of 546nm. In addition, regarding the correspondence between the surface numbers of each lens and the object side and image side of each lens, please refer to the description in Embodiment 1 above, which will not be repeated here.

[0148] Table 5

[0149]

[0150]

[0151] Table 6 gives the higher-order coefficients that can be used for each aspherical surface of the seventh lens L7 in Example 2, wherein each aspherical surface shape can be defined by the formula given in Example 1.

[0152] Table 6

[0153]

[0154]

[0155] 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.

[0156] Example 4

[0157] Figure 7This is a schematic diagram of the structure of the optical lens 100 disclosed in Embodiment 4 of this application. Specifically, taking the effective focal length parameter F = 3.921mm, the aperture number FNO = 1.505, and the maximum field of view FOV = 150deg 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 foregoing embodiments and will not be repeated here. The refractive index, Abbe number, etc. in Table 7 are all obtained at a reference wavelength of 587.6nm, and the focal length is obtained at a reference wavelength of 546nm. In addition, regarding the correspondence between the surface numbers of each lens and the object side and image side of each lens, please refer to the description in Embodiment 1 above, and it will not be repeated here.

[0158] Table 7

[0159]

[0160]

[0161] Table 8 gives the higher-order coefficients that can be used for each aspherical surface of the seventh lens L7 in Example 4, wherein each aspherical surface shape can be defined by the formula given in Example 1.

[0162] Table 8

[0163]

[0164] 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.

[0165] Example 5

[0166] Figure 9This is a schematic diagram of the structure of the optical lens 100 disclosed in Embodiment 5 of this application. Specifically, taking the effective focal length parameter F = 3.942mm, the aperture number FNO = 1.45, and the maximum field of view FOV = 160deg 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 foregoing embodiments, and will not be repeated here. The refractive index, Abbe number, etc. in Table 9 are all obtained at a reference wavelength of 587.6nm, and the focal length is obtained at a reference wavelength of 546nm. In addition, regarding the correspondence between the surface numbers of each lens and the object side and image side of each lens, please refer to the description in Embodiment 1 above, and will not be repeated here.

[0167] Table 9

[0168]

[0169] Table 10 gives the higher-order coefficients that can be used for each aspherical surface of the seventh lens L7 in Example 5, wherein each aspherical surface shape can be defined by the formula given in Example 1.

[0170] Table 10

[0171]

[0172]

[0173] 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 10 (A) Figure 10 (B) and Figure 10 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.

[0174] Please refer to Table 11, which summarizes the ratios of the various relationships in the first to fifth embodiments of this application.

[0175] Table 11

[0176]

[0177]

[0178] Please see Figure 11This application also discloses a camera module 200, which includes an image sensor 201 and an optical lens 100 as described in any of embodiments 1 to 5 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 light rays from an object passing through the lens and incident on the photosensitive surface can be converted into electrical signals of an image. The image sensor 201 can be a complementary metal-oxide-semiconductor (CMOS) or a charge-coupled device (CCD). The camera module 200 can be an imaging module integrated on a terminal device 300, or it can be a standalone lens. It is understood that the camera module 200 with the aforementioned optical lens 100 has all the technical effects of the aforementioned optical lens 100, that is, the camera module 200 can meet the requirements of a large field of view, a large aperture, and high relative illumination while also taking into account the need for miniaturization. Since the above-mentioned technical effects have been described in detail in the embodiments of the optical lens 100, they will not be repeated here.

[0179] 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 12 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.

[0180] 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, a large aperture, and high relative illumination while also taking into account the need for miniaturization. Since the aforementioned technical effects have been described in detail in the embodiments of the optical lens 100, they will not be repeated here.

[0181] 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, the object side of the seventh lens is convex near the optical axis, and the image side of the seventh lens is concave near the optical axis. The optical lens satisfies the following relationship: 150deg≤FOV≤160deg and 1.4≤FNO≤1.55 and 0.4≤CT3 / CT34≤3 and 6.5≤TTL / IMGH≤7.7; Wherein, FOV is the maximum field of view of the optical lens, FNO is the aperture number of the optical lens, CT3 is the thickness of the third lens on the optical axis, CT34 is the distance on the optical axis from the image side of the third lens to the object side of the fourth 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.

2. The optical lens according to claim 1, characterized in that, The optical lens satisfies the following relationship: 99deg≤FOV / FNO≤114deg, and / or, 0.8≤BFL / F≤1.1; Wherein, BFL is the distance from the image side of the seventh lens to the imaging surface of the optical lens along the optical axis, and F is the focal length of the optical lens.

3. The optical lens according to claim 1, characterized in that, The optical lens satisfies the following relationship: -0.25≤(R3-R4) / (R3+R4)≤-0.15, and / or, 1.8≤SD1 / SD3≤2.1, and / or, 2≤SAGS2 / SAGS1≤4.5; Wherein, R3 is the radius of curvature of the object side of the second lens at the optical axis, R4 is the radius of curvature of the image side of the second lens at the optical axis, SD1 is half of the maximum effective aperture of the object side of the first lens, SD3 is half of the maximum effective aperture of the object side of the second lens, SAGS2 is the distance from the intersection of the image side of the first lens and the optical axis to the maximum effective aperture of the image side of the first lens on the optical axis, and SAGS1 is the distance from the intersection of the object side of the first lens and the optical axis to the maximum effective aperture of the object side of the first lens on the optical axis.

4. The optical lens according to claim 1, characterized in that, The optical lens satisfies the following relationship: 4≤F3 / F≤5.5, and / or, 4≤F5 / F≤6.2, and / or, 3.9≤F7 / F≤7; Wherein, F3 is the focal length of the third lens, F5 is the focal length of the fifth lens, F7 is the focal length of the seventh lens, and F is the focal length of the optical lens.

5. The optical lens according to claim 1, characterized in that, The optical lens satisfies the following relationship: 0.1mm -1 ≤|(Vd5-Vd6) / F56|≤0.9mm -1 And / or, 0.9≤SD8 / SD9≤1.1, and / or, 1≤SD13 / SD12≤1.05; 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, SD8 is half the maximum effective aperture of the image side of the fourth lens, SD9 is half the maximum effective aperture of the object side of the fifth lens, SD13 is half the maximum effective aperture of the object side of the seventh lens, and SD12 is half the maximum effective aperture of the image side of the sixth lens.

6. The optical lens according to claim 1, characterized in that, The optical lens satisfies the following relationship: 7≤TTL / (CT6+CT7)≤11, and / or, 1.4≤CT7 / CT67≤2.7; Wherein, CT6 is the thickness of the sixth lens on the optical axis, CT7 is the thickness of the seventh lens on the optical axis, and CT67 is the distance on the optical axis from the image side of the sixth lens to the object side of the seventh lens.

7. The optical lens according to claim 1, characterized in that, The optical lens satisfies the following relationship: 5≤R1 / R2≤13, and / or, -1.2≤R9 / R10≤-0.8, and / or, 0.3≤CT6 / ET6≤0.5; 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, R9 is the radius of curvature of the object side of the fifth lens at the optical axis, R10 is the radius of curvature of the image side of the fifth lens at the optical axis, CT6 is the thickness of the sixth lens on the optical axis, and ET6 is the distance from the maximum effective aperture of the object side of the sixth lens to the maximum effective aperture of the image side of the sixth lens on the optical axis.

8. The optical lens according to claim 1, characterized in that, The optical lens satisfies the following relationship: 34mm≤TTL*IMGH / F≤40mm, and / or, 0.22≤SD1 / TTL≤0.28, and / or, 3.2≤F*tan(FOV / 2) / IMGH≤5; Where F is the focal length of the optical lens, SD1 is half the maximum effective aperture of the object side of the first lens, and tan(FOV / 2) is the tangent of half the maximum field of view of the optical lens.

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

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

Images