Optical lens, camera module and terminal equipment

Abstract

The invention discloses an optical lens, a camera module and a terminal device, the optical lens comprises seven lenses with refractive power, the first lens has negative refractive power, and the object side surface and the image side surface of the first lens are respectively a convex surface and a concave surface near an optical axis; the second lens element with negative refractive power has a concave object-side surface and a convex image-side surface in a paraxial region, respectively. The third lens element with positive refractive power has a convex object-side surface and a concave image-side surface in paraxial regions, respectively. The fourth lens element with positive refractive power has an object-side surface and an image-side surface being convex in a paraxial region. The fifth lens element with positive refractive power has an object-side surface and an image-side surface being convex in a paraxial region. The sixth lens element with negative refractive power has an object-side surface and an image-side surface being concave and convex in a paraxial region thereof. The seventh lens element with positive refractive power has an object-side surface and an image-side surface being convex and concave in a paraxial region thereof. The optical lens satisfies the following relational expressions: 150 deg < = FOV < = 160 deg and 1.4 < = FNO < = 1.55.

Description

Technical Field

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

[0002] With the continuous advancement of autonomous driving technology, the performance requirements for front-view optical lenses are also increasing, especially in terms of achieving high resolution, large field of view and low distortion. At the same time, with the increasing demand for night driving, the performance of vehicle lenses in low-light environments (such as at night or in rainy days) has become particularly important.

[0003] Although the optical lenses currently used have a large aperture, it is often difficult to ensure image clarity while maintaining high resolution. At the same time, it is impossible to take into account miniaturization and imaging effects in low-light environments. Summary of the invention

[0004] The present 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 a high relative illumination while taking into account the requirements of a miniaturized design.

[0005] In order to achieve the above objectives, in a first aspect, the present application discloses an optical lens, comprising:

[0006] There are 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, which are arranged in sequence from the object side to the image side along the optical axis;

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

[0008] The second lens has negative refractive power, the object side surface of the second lens is concave at the near optical axis, and the image side surface of the second lens is convex at the near optical axis;

[0009] The third lens has positive refractive power, the object side surface of the third lens is convex at the near optical axis, and the image side surface of the third lens is concave at the near optical axis;

[0010] The fourth lens has positive refractive power, and the object side surface and the image side surface of the fourth lens are both convex surfaces near the optical axis;

[0011] The fifth lens has positive refractive power, and the object side surface and the image side surface of the fifth lens are both convex surfaces near the optical axis;

[0012] The sixth lens has negative refractive power, the object side surface of the sixth lens is concave at the near optical axis, and the image side surface of the sixth lens is convex at the near optical axis;

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

[0014] The optical lens satisfies the following relationship:

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

[0016] Among them, 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 by the present application, in order to meet the requirements of large aperture, large field of view, high relative illumination and miniaturized design, the first lens is set to have negative refractive power, and the design that its object side and image side are convex and concave respectively at the near optical axis is conducive to coupling more light into the optical lens, effectively increasing the field of view, improving the relative illumination of the edge field of view of the optical lens, and effectively avoiding the occurrence of dark corners; the second lens is set to have negative refractive power, and the design that its object side and image side are concave and convex respectively at the near optical axis can make the light passing through the first lens enter the optical lens more smoothly; the third lens is set to have positive refractive power, and the design that its object side and image side are convex and concave respectively at the near optical axis is conducive to collecting and compressing more incident light, so that the incident light can smoothly enter the fourth lens; the fourth lens is set to have positive refractive power, and the design that its object side and image side are convex at the near optical axis is The design of the surface is conducive to reducing the incident angle of the incident light after passing through the aperture, so that more light can be coupled into the optical lens, and the relative illumination of the optical lens can also be improved; the fifth lens is set to have positive refractive power, and the design that its object side and image side are convex at the near optical axis is conducive to focusing light and reducing the total length of the optical lens, thereby realizing the miniaturization design of the optical lens; the sixth lens is set to have negative refractive power, and the design that its object side and image side are concave and convex at the near optical axis respectively, combined with the positive refractive power of the fifth lens, is conducive to eliminating chromatic aberration, balancing phase difference and improving resolution, and can effectively reduce the sensitivity of the optical lens, thereby effectively improving the imaging quality of the optical lens; the seventh lens is set to have positive refractive power, and the design that its object side and image side are convex and concave at the near optical axis respectively, can effectively correct the distortion of the edge field of view, and can also effectively improve the imaging 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 for the optical lens to meet the large field of view requirement 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 capacity of the optical lens can be improved, making the relative illumination of the optical lens higher, so that it has good imaging quality in darker environments such as at night or on rainy days, and meets 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] Among them, 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 of the image height corresponding to the maximum field of view angle 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 angle and the aperture number of the optical lens, a reasonable field of view angle and aperture number are provided for the optical lens, which can take into account both the design difficulty and the field of view angle requirements, while allowing the aperture to vary within a reasonable range, providing a combination effect of a large viewing angle and a large aperture, satisfying the characteristics of the optical lens with 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, and further conducive to realizing the miniaturization design of the optical lens.

[0025] The optical lens satisfies the relationship 0.8≤BFL / F≤1.1. By controlling the ratio of the back focus of the optical lens to the focal length of the optical lens, it is beneficial to reasonably control the back focus and ensure the matching of the optical lens and the image sensor. When the optical lens exceeds the upper limit of the above relationship, the back focus of the optical lens is too long, which is not conducive to achieving a large image surface 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] Among them, R3 is the curvature radius of the object side of the second lens at the optical axis, R4 is the curvature radius 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 curvature radius of the second lens affects the curvature of the second lens, the above relationship can effectively correct the edge field aberration of the optical lens, suppress the generation of astigmatism, and reduce the angle of the main light of the peripheral viewing angle incident on the imaging surface of the optical lens, thereby improving the imaging quality of the optical lens. When the range of the relationship is exceeded, it is not conducive to the correction of the aberration of the optical lens.

[0030] The optical lens satisfies the relationship 1.8≤SD1 / SD3≤2.1, so that the second lens has a small aperture characteristic and can effectively converge the light of the first lens so that the light can better enter the imaging surface of the optical lens.

[0031] The optical lens satisfies the relationship 2≤SAGS2 / SAGS1≤4.5, which is conducive to realizing the characteristic of the optical lens having a small front port diameter.

[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] Among them, 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 focal length distribution of each lens can be uniform and reasonable, so that aberrations are easy to correct and the image quality of the optical lens is 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] Among them, 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 lens and the sixth lens, SD8 is half of the maximum effective aperture of the image side surface of the fourth lens, SD9 is half of the maximum effective aperture of the object side surface of the fifth lens, SD13 is half of the maximum effective aperture of the object side surface of the seventh lens, and SD12 is half of the maximum effective aperture of the image side surface of the sixth lens.

[0039] The optical lens satisfies the relationship 0.1mm -1 ≤|(Vd5-Vd6) / F56|≤0.9mm -1 By reasonably setting the ratio of the difference in Abbe numbers between the sixth lens and the fifth lens to the combined effective focal length of the sixth lens and the fifth lens, the chromatic aberration of the optical lens can be effectively corrected, the authenticity of the color can be restored, and the imaging quality can be improved.

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

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

[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] Among them, TTL is the distance from the object side surface of the first lens to the imaging surface of the optical lens in the optical axis direction, CT6 is the thickness of the sixth lens on the optical axis, CT7 is the thickness of the seventh lens on the optical axis, CT3 is the thickness of the third lens on the optical axis, CT34 is the spacing distance from the image side surface of the third lens to the object side surface of the fourth lens on the optical axis, and CT67 is the distance from the image side surface of the sixth lens to the object side surface of the seventh lens on 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 lens and the seventh lens on the optical axis, it is beneficial to the reasonable 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 lower than the lower limit of the above relationship, the sixth lens and the seventh lens are too thick, the risk of light bending increases, and the decentering sensitivity between the lenses is increased, which is not conducive 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 between the image side surface of the sixth lens and the object side surface of the seventh 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.

[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] Among them, R1 is the curvature radius of the object side of the first lens at the optical axis, R2 is the curvature radius of the image side of the first lens at the optical axis, R9 is the curvature radius of the object side of the fifth lens at the optical axis, R10 is the curvature radius 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 parallel to the optical axis.

[0051] The optical lens satisfies the relationship 5≤R1 / R2≤13, -1.2≤R9 / R10≤-0.8. By reasonably matching the ratio of the curvature radius of the object side and the image side of each lens at the optical axis, the surface difference of each lens is set reasonably, which is conducive to controlling the shape of each lens, correcting the aberration generated by itself, and improving the imaging quality. In addition, it is also easy to control the curvature of the surface of each lens and reduce the difficulty of processing.

[0052] The optical lens satisfies the relationship 0.3≤CT6 / ET6≤0.5. By controlling the ratio of the thickness of the sixth lens on the optical axis to the edge thickness, it can not only effectively balance the high-order aberrations generated by the optical lens, but also facilitate the adjustment of the field curvature of the sixth lens, thereby improving the imaging quality of the optical lens. At the same time, the appropriate edge thickness can also provide sufficient mechanical strength for the sixth lens, thereby reducing the difficulty of processing.

[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] Among them, 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 of 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 of the maximum effective aperture of the object side of the first lens, and tan(FOV / 2) is the tangent value of half the maximum field of view of the optical lens.

[0056] The optical lens satisfies the relationship 34mm≤TTL*IMGH / F≤40mm, which can enable the optical lens to meet the needs of a large target surface while satisfying the needs of adapting the optical lens to a large-size imaging surface and miniaturizing the optical lens.

[0057] The optical lens satisfies the relationship 0.22≤SD1 / TTL≤0.28. Under a certain total length of the optical lens, the head size and volume of the optical lens are limited by controlling the ratio of the maximum effective semi-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 can ensure that the optical lens has high pixels and better wide-angle photography effect. When the length of the diagonal of the effective pixel area on the imaging surface and the field of view of 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] In a second aspect, the present application further discloses a camera module, which includes an image sensor and the optical lens as described in the first aspect above, wherein the image sensor is arranged on the image side of the optical lens.

[0060] In a third aspect, the present application further discloses a terminal device, comprising a housing and a camera module as described in the second aspect above, wherein the camera module is arranged in the housing.

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

[0062] In the optical lens provided by the present application, in order to meet the requirements of large aperture, large field of view, high relative illumination and miniaturized design, the first lens is set to have negative refractive power, and the design that its object side and image side are convex and concave respectively at the near optical axis is conducive to coupling more light into the optical lens, effectively increasing the field of view, improving the relative illumination of the edge field of view of the optical lens, and effectively avoiding the occurrence of dark corners; the second lens is set to have negative refractive power, and the design that its object side and image side are concave and convex respectively at the near optical axis can make the light passing through the first lens enter the optical lens more smoothly; the third lens is set to have positive refractive power, and the design that its object side and image side are convex and concave respectively at the near optical axis is conducive to collecting and compressing more incident light, so that the incident light can smoothly enter the fourth lens; the fourth lens is set to have positive refractive power, and the design that its object side and image side are convex at the near optical axis is The design of the surface is conducive to reducing the incident angle of the incident light after passing through the aperture, so that more light can be coupled into the optical lens, and the relative illumination of the optical lens can also be improved; the fifth lens is set to have positive refractive power, and the design that its object side and image side are convex at the near optical axis is conducive to focusing light and reducing the total length of the optical lens, thereby realizing the miniaturization design of the optical lens; the sixth lens is set to have negative refractive power, and the design that its object side and image side are concave and convex at the near optical axis respectively, combined with the positive refractive power of the fifth lens, is conducive to eliminating chromatic aberration, balancing phase difference and improving resolution, and can effectively reduce the sensitivity of the optical lens, thereby effectively improving the imaging quality of the optical lens; the seventh lens is set to have positive refractive power, and the design that its object side and image side are convex and concave at the near optical axis respectively, can effectively correct the distortion of the edge field of view, and can also effectively improve the imaging 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 for the optical lens to meet the large field of view requirement 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 capacity of the optical lens can be improved, making the relative illumination of the optical lens higher, so that it has good imaging quality in darker environments such as at night or on rainy days, and meets the requirements of large aperture and high resolution. BRIEF DESCRIPTION OF THE DRAWINGS

[0065] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0066] Figure 1 is a schematic structural diagram of the optical lens disclosed in Example 1 of the present application;

[0067] Figure 2 is the spherical aberration diagram (mm), astigmatism diagram (mm) and distortion diagram (%) of the optical lens disclosed in Example 1 of the present application;

[0068] Figure 3 is a schematic structural diagram of the optical lens disclosed in Example 2 of the present application;

[0069] Figure 4 is the spherical aberration diagram (mm), astigmatism diagram (mm) and distortion diagram (%) of the optical lens disclosed in Example 2 of the present application;

[0070] Figure 5 is a schematic diagram of the structure of the optical lens disclosed in Example 3 of the present application;

[0071] Figure 6 is the spherical aberration diagram (mm), astigmatism diagram (mm) and distortion diagram (%) of the optical lens disclosed in Example 3 of the present application;

[0072] Figure 7 is a schematic structural diagram of the optical lens disclosed in Example 4 of the present application;

[0073] Figure 8 is the spherical aberration diagram (mm), astigmatism diagram (mm) and distortion diagram (%) of the optical lens disclosed in Example 4 of the present application;

[0074] Fig. 9 is a schematic structural diagram of the optical lens disclosed in Example 5 of the present application;

[0075] Fig.10 is the spherical aberration diagram (mm), astigmatism diagram (mm) and distortion diagram (%) of the optical lens disclosed in Example 5 of the present application;

[0076] Fig.11 It is a structural schematic diagram of the camera module disclosed in this application;

[0077] Fig.12 It is a schematic diagram of the structure when the terminal device disclosed in the present application is a car. DETAILED DESCRIPTION

[0078] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0079] In the present application, the directions or positional relationships indicated by the terms "upper", "front", "back", "top", "inner", "outer", "middle", etc. are based on the directions or positional relationships shown in the drawings. These terms are mainly used to better describe the present application and its embodiments, and are not used to limit the indicated devices, elements or components to have a specific direction, or to be constructed and operated in a specific direction.

[0080] In addition, some of the above terms may be used to express other meanings in addition to indicating orientation or positional relationship. For example, the term "on" may also be used to express a certain dependency or connection relationship in some cases. For those of ordinary skill in the art, the specific meanings of these terms in this application can be understood according to specific circumstances.

[0081] In addition, the term "disposed" should be understood in a broad sense. For example, it can be 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 through an intermediate medium, or it can be an internal connection between two devices, elements, or components. For those of ordinary skill in the art, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0082] In addition, the terms "first", "second", etc. are mainly used to distinguish different devices, elements or components (the specific types and structures may be the same or different), and are not used to indicate or imply the relative importance and quantity of the indicated devices, elements or components. Unless otherwise specified, "plurality" means two or more.

[0083] The technical solution of the present application will be further described below in conjunction with embodiments and drawings.

[0084] See also Figure 1 The present application discloses an optical lens 100, which includes a first lens L1, a second lens L2, a third lens L3, a fourth lens L4, a fifth lens L5, a sixth lens L6, and a seventh lens L7, which are arranged in sequence from the object side to the image side along the optical axis. When imaging, light enters the first lens L1, the second lens L2, the third lens L3, the fourth lens L4, the fifth lens L5, the sixth lens L6, and the seventh lens L7 in sequence from the object side of the first lens L1, and is finally imaged on the imaging surface 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 at the near optical axis, and the image-side surface S2 of the first lens L1 is concave at the near optical axis; the object-side surface S3 of the second lens L2 is concave at the near optical axis, and the image-side surface S4 of the second lens L2 is convex at the near optical axis; the object-side surface S5 of the third lens L3 is convex at the near optical axis, and the image-side surface S6 of the third lens L3 is convex at the near optical axis; the object-side surface S7 of the fourth lens L4 is convex at the near optical axis The image side surface S8 of the fourth lens L4 is convex at the near optical axis; the object side surface S9 of the fifth lens L5 is convex at the near optical axis, and the image side surface S10 of the fifth lens L5 is convex at the near optical axis; the object side surface S11 of the sixth lens L6 is concave at the near optical axis, and the image side surface S12 of the sixth lens L6 is concave at the near optical axis; the object side surface S13 of the seventh lens L7 is convex at the near optical axis, and the image side surface S14 of the seventh lens L7 is concave at the near optical axis.

[0087] Optionally, all lenses in the optical lens 100 may be made of glass, or may be made of plastic, or some lenses may be made of glass and some lenses may be made of plastic. Preferably, all lenses in the optical lens 100 are made of glass. Lenses made of glass can suppress the deviation of the back focus of the optical lens 100 due to temperature changes, so as to improve the stability of the optical lens 100. At the same time, the use of glass material can avoid the blurring of the optical lens 100 caused by high and low temperature changes in the use environment, which affects 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. The combination of spherical lenses and aspherical lenses can improve high-order aberrations and thus improve the imaging quality of the optical lens 100.

[0089] In some embodiments, the optical lens further includes a stop 102, which may be an aperture stop and / or a field stop, and may 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 stop 102 may also be disposed between other lenses, and the setting may be adjusted according to actual conditions, and this embodiment is not specifically limited thereto.

[0090] In some embodiments, the optical lens 100 further includes a filter 110, and the filter 110 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, and this embodiment is not specifically limited. In this embodiment, the filter 110 can use an infrared cutoff filter, so that light of other bands such as infrared light can be filtered out, and only visible light can be allowed to pass through, so that the imaging is more in line with the visual experience of the human eye. Of course, the filter 110 can also use an infrared bandpass filter, so that light of other bands such as visible light can be filtered out, and only infrared light can be allowed to pass through, and the imaging quality can be improved by filtering out light of other bands such as visible light; and the optical lens 100 can be used as an infrared optical lens 100, that is, the optical lens 100 can also form an image in a dim environment and other special application scenarios and can obtain a better imaging effect. Preferably, the filter 110 may be made of glass. Of course, in other embodiments, the filter 110 may also be made of optical glass coating, or a filter 110 of other materials, which may be selected according to actual needs and is not specifically limited in this embodiment.

[0091] In some embodiments, the optical lens 100 further includes a protective glass 120 , which is disposed between the filter 110 and the imaging surface 101 , so that the protective glass 120 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, wherein FOV is the maximum field of view of the optical lens. By properly 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.

[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 capacity of the optical lens 100 can be improved, so that the relative illumination of the optical lens 100 is higher, so that it has good imaging quality in dark environments such as night or rainy days, and meets the requirements of large aperture and high resolution.

[0094] In one embodiment, the optical lens 100 satisfies the relationship 99deg≤FOV / FNO≤114deg, wherein 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 are provided for the optical lens 100, which can take into account both the design difficulty and the field of view requirements, and at the same time make the aperture change within a reasonable range, providing a combination effect of a large viewing angle and a large aperture, and 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, wherein TTL is the total length of the optical lens 100, and IMGH is half of the image height corresponding to the maximum field angle of the optical lens 100. By controlling the ratio of the total length of the optical lens 100 to the half image height of the optical lens 100, it is beneficial to control the total length of the optical lens 100, and further to realize 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, wherein BFL is the distance from the image side surface S14 of the seventh lens L7 to the imaging surface 101 of the optical lens 100 in the optical axis direction, and F is the focal length of the optical lens 100. By controlling the ratio of the back focus of the optical lens 100 to the focal length of the optical lens 100, it is beneficial to reasonably control the back focus and ensure the matching of the optical lens 100 and the image sensor 201. When the optical lens 100 exceeds the upper limit of the above relationship, the back focus of the optical lens 100 is too long, which is not conducive to achieving a large image surface effect.

[0097] In one embodiment, the optical lens 100 satisfies the relationship -0.25≤(R3-R4) / (R3+R4)≤-0.15; wherein R3 is the radius of curvature of the object side of the second lens L2 at the optical axis, and R4 is the radius of curvature of the image side of the second lens L2 at the optical axis. Since the radius of curvature of the second lens L2 affects the curvature of the second lens L2, the above relationship can effectively correct the edge field aberration of the optical lens 100, suppress the generation of astigmatism, and at the same time, reduce the angle of the main light of the peripheral viewing angle incident on the imaging surface 101 of the optical lens 100, thereby improving the imaging quality of the optical lens 100. When the range of the relationship is exceeded, it is not conducive to the correction of the aberration of the optical lens 100.

[0098] In one embodiment, the optical lens 100 satisfies the relationship 1.8≤SD1 / SD3≤2.1, wherein SD1 is half of the maximum effective aperture of the object side surface S11 of the first lens L1, and SD3 is half of the maximum effective aperture of the object side surface S3 of the second lens L2. Thus, the second lens L2 can have a small aperture characteristic, and can effectively converge the light of the first lens L1, so that the light can better enter the imaging surface 101 of the optical lens 100.

[0099] In one embodiment, the optical lens 100 satisfies the relationship 2≤SAGS2 / SAGS1≤4.5; wherein 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. Such a configuration is conducive to achieving the characteristic of the optical lens 100 having a small front aperture.

[0100] In one embodiment, the optical lens 100 satisfies the relationship -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; wherein 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 focal power distribution of each lens can be uniform and reasonable, so that the aberration is easy to correct and the image quality of the optical lens 100 is good.

[0101] In one embodiment, the optical lens 100 satisfies the relationship 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; wherein 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 properly matching the ratio of the curvature radius of the object side and the image side of each lens at the optical axis, the surface difference of each lens can be reasonably set, which is conducive to controlling the shape of each lens, correcting the aberration generated by itself, and improving the imaging quality. In addition, it is also easy to control the curvature of the surface of each lens and reduce the difficulty of processing.

[0103] In one embodiment, the optical lens 100 satisfies the relationship 0.1 mm -1 ≤|(Vd5-Vd6) / F56|≤0.9mm -1 ; Wherein, 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 the colors can be restored, and the imaging quality can be improved.

[0104] In one embodiment, the optical lens 100 satisfies the relationship 0.9≤SD8 / SD9≤1.1, wherein SD8 is half of the maximum effective aperture of the image side surface S8 of the fourth lens L4, and SD9 is half of the maximum effective aperture of the object side surface S9 of the fifth lens L5. By reasonably allocating the maximum effective apertures of the fourth lens L4 and the fifth lens L5, it is helpful to reduce the step difference between the fourth lens L4 and the fifth lens L5, so that light can 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, SD13 is half of the maximum effective aperture of the object side surface S13 of the seventh lens L7, and SD12 is half of the maximum effective aperture of the image side surface S12 of the sixth lens L6. By reasonably allocating the maximum effective apertures of the seventh lens L7 and the sixth lens L6, it is helpful to reduce the step difference between the sixth lens L6 and the seventh lens L7, so that light can 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, wherein CT6 is the thickness of the sixth lens L6 on the optical axis, and CT7 is the thickness of the seventh lens L7 on the optical axis. By controlling the ratio of the total length of the optical lens 100 to the thickness of the sixth lens L6 and the seventh lens L7 on the optical axis, it is beneficial to the reasonable allocation of the space of the entire optical lens 100, so that the structure of the optical lens 100 is 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 lower than the lower limit of the above relationship, the sixth lens L6 and the seventh lens L7 are too thick, the risk of light bending increases, and the decentering sensitivity between the lenses is increased, which is not conducive to the assembly of the optical lens 100.

[0107] In one embodiment, the optical lens 100 satisfies the relationship 0.3≤CT1 / ET1≤0.55, 1.2≤CT3 / ET3≤2 and 0.3≤CT6 / ET6≤0.5; wherein ET1 is the distance 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 in the optical axis direction, ET3 is the distance 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 in the optical axis direction, and ET6 is the distance 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 in the optical axis direction. By controlling the ratio of the thickness of the first lens L1, the third lens L3 and the sixth lens L6 on the optical axis to the edge thickness, not only can the higher-order aberrations generated by the optical lens 100 be effectively balanced, but also the field curvature adjustment of the above lenses is beneficial, thereby improving the imaging quality of the optical lens 100. At the same time, the appropriate edge thickness can also provide sufficient mechanical strength for the lens, thereby reducing the difficulty of processing.

[0108] In one embodiment, the optical lens 100 satisfies the relationship 0.4≤CT3 / CT34≤3, CT3 is the thickness of the third lens L3 on the optical axis, CT34 is the distance between the image side surface S6 of the third lens L3 and the object side surface S7 of the fourth lens L4 on the optical axis, and by reasonably controlling the ratio of the thickness of the third lens L3 on the optical axis and the distance between the third lens L3 and the fourth lens L4 on the optical axis, it is beneficial to reduce the overall 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, CT7 is the thickness of the seventh lens L7 on the optical axis, and CT67 is the distance between the image side surface S12 of the sixth lens L6 and the object side surface S13 of the seventh lens L7 on the optical axis. By reasonably controlling the ratio of the distance between the image side surface S12 of the sixth lens L6 and the object side surface S13 of the seventh lens L7 on the optical axis, 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 meet the requirements of a large target surface while satisfying the requirements of adapting the optical lens 100 to a large-sized 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, SD1 is the maximum effective semi-aperture of the object-side surface S1 of the first lens L1, and 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 semi-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 value of half the maximum field of view of the optical lens 100, which can ensure that the optical lens 100 has high pixels and a better wide-angle photography effect. When the length of the diagonal of the effective pixel area on the imaging surface 101 and the field of view of the diagonal direction of the optical lens 100 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, TTL is the total length of the optical lens 100, and F is the focal length of the optical lens 100. The total length of the optical lens 100 and the focal length of the optical lens 100 can be reasonably controlled, so that the optical lens 100 has a reasonable focal length without causing the total length of the optical lens 100 to be too long, which is conducive to realizing the miniaturization of 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 high-definition imaging requirements and to realize the shooting of the optical lens 100 within a larger 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 lower than the lower limit of the above relationship, the focal length of the optical lens 100 is too short, which is not conducive to the realization of the telephoto function of the optical lens 100, resulting in insufficient clarity of distant scenes, affecting the imaging effect.

[0115] In one implementation, 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 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 of the first lens L1 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. By satisfying this relationship, the refractive power of the second lens L2 can cooperate with the refractive power of the first lens L1 to correct spherical aberration, so that the optical lens 100 has good imaging quality.

[0118] In one embodiment, the optical lens 100 satisfies the relationship 3≤F3 / CT3≤16, F3 is the focal length of the third lens L3, CT3 is the thickness of the third lens L3 on the optical axis, and the refractive power of the third lens L3 can be reasonably configured to effectively control the deflection angle of the light in the optical lens 100, thereby reducing the sensitivity of the optical lens 100 and improving the resolution of the optical lens 100.

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

[0120] In one embodiment, the optical lens 100 satisfies the relationship 6≤F5 / CT5≤8.5, 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 high-order aberrations and improve the quality of the optical lens 100.

[0121] In one implementation, the optical lens 100 satisfies the relationship -20≤F6 / CT6≤-9, so that the refractive power of the sixth lens L6 is moderate, and can cooperate with the fifth lens L5 to balance high-order aberrations, thereby improving the quality of the optical lens 100.

[0122] In one implementation, 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 properly 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, and can reduce the tolerance sensitivity of the seventh lens L7, reduce the difficulty of the processing technology, and help improve the assembly yield of the optical lens 100.

[0123] Example 1

[0124] Figure 1The schematic diagram of the structure of the optical lens 100 disclosed in Example 1 of the present application, the optical lens 100 comprises a first lens L1, a second lens L2, a third lens L3, an aperture 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, which are arranged in sequence from the object side to the image side along the optical axis. Among them, the object side surface S1 of the first lens L1 is a convex surface at the near optical axis, and the image side surface S2 of the first lens L1 is a concave surface at the near optical axis; the object side surface S3 of the second lens L2 is a concave surface at the near optical axis, and the image side surface S4 of the second lens L2 is a convex surface at the near optical axis; the object side surface S5 of the third lens L3 is a convex surface at the near optical axis, and the image side surface S6 of the third lens L3 is a convex surface at the near optical axis; the object side surface S7 of the fourth lens L4 is a convex surface at the near optical axis, The image-side surface S8 of the fourth lens L4 is convex at the near optical axis; the object-side surface S9 of the fifth lens L5 is convex at the near optical axis, and the image-side surface S10 of the fifth lens L5 is convex at the near optical axis; the object-side surface S11 of the sixth lens L6 is concave at the near optical axis, and the image-side surface S12 of the sixth lens L6 is concave at the near optical axis; the object-side surface S13 of the seventh lens L7 is convex at the near optical axis, and the image-side surface S14 of the seventh lens L7 is concave at the near optical axis.

[0125] Specifically, taking the effective focal length parameter F=3.815mm of the optical lens 100, the aperture number FNO=1.406 of the optical lens 100, and the maximum field angle FOV=160deg of the optical lens 100 as examples, other parameters of the optical lens 100 are given in the following Table 1. Among them, the elements along the optical axis of the optical lens 100 from the object side to the image side are arranged in the order of the elements from top to bottom in Table 1. In the same lens, the surface with a smaller surface number is the object side surface of the lens, and the surface with a larger surface number is the image side surface of the lens, such as surface numbers 1 and 2 correspond to the object side surface S1 and image side surface S2 of the first lens L1, respectively. The Y radius in Table 1 is the radius of curvature of the object side surface or image side surface of the corresponding surface number at the optical axis. The first value in the "thickness" parameter column of the lens is the thickness of the lens on the optical axis, and the second value is the distance from the image side surface of the lens to the next surface on the optical axis. The value of the aperture 102 in the "Thickness" parameter column is the distance from the aperture 102 to the vertex of the next surface (the vertex refers to the intersection of the surface and the optical axis) on the optical axis. By default, the direction from the object side S1 of the first lens L1 to the image side of the last lens is the positive direction of the optical axis. When the value is negative, it indicates that the aperture 102 is set on the image side of the vertex of the next surface. If the thickness of the aperture 102 is a positive value, the aperture 102 is on the object side of the vertex of the next surface. It can be understood that the units of the Y radius, thickness, and focal length in Table 1 are all mm. And the refractive index, Abbe number, etc. in Table 1 are all obtained at a reference wavelength of 587.6nm, and the focal length is obtained at a reference wavelength of 546nm.

[0126] Table 1

[0127]

[0128]

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

[0130]

[0131] Among them, x is the distance vector height from the vertex of the aspheric surface when the aspheric surface is at a height of h along the optical axis; c is the curvature of the aspheric surface at the optical axis, c=1 / Y (that is, the paraxial curvature c is the reciprocal of the curvature radius Y in Table 1 above); K is the cone coefficient; Ai is the correction coefficient of the i-th order of the aspheric surface. The following Table 2 gives the high-order coefficients A4, A6, A8, A10, A12, A14, and A16 of the aspheric surface of the seventh lens L7.

[0132] Table 2

[0133]

[0134] Figure 2 It is the spherical aberration diagram (mm), astigmatism diagram (mm) and distortion diagram (%) of the optical lens disclosed in Example 1 of the present application. Figure 2 (A) is a spherical aberration diagram of the optical lens 100 at wavelengths of 656nm, 588nm, 546nm, 486nm, and 436nm. The horizontal axis along the X-axis direction represents the focus offset in mm, and the vertical axis along the Y-axis direction represents the normalized field of view. Figure 2 As can be seen from (A) in the figure, the spherical aberration value of the optical lens 100 in Example 1 is better, which means that the imaging quality of the optical lens 100 in this embodiment is better.

[0135] Figure 2 (B) is the astigmatism diagram of the optical lens 100 in Example 1 at a wavelength of 546 nm. The horizontal axis along the X-axis direction represents the focus offset in mm, and the vertical axis along the Y-axis direction represents the field angle in degrees. T in the astigmatism diagram represents the curvature of the imaging surface 101 in the meridian 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, the field curvature and astigmatism of each field of view are well corrected, and the center and edge of the field of view have clear images, that is, the astigmatism of the optical lens 100 is well compensated.

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

[0137] Example 2

[0138] Figure 3 This is a schematic diagram of the structure of the optical lens 100 disclosed in Example 2 of the present application. Specifically, taking the effective focal length parameter F=3.99mm of the optical lens 100, the aperture number FNO=1.50 of the optical lens 100 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 the following Table 3. The definition of each parameter can be derived from the description of the aforementioned embodiment 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 serial numbers of each surface of each lens and the object side and image side of each lens, please refer to the aforementioned Example 1, which will not be repeated here.

[0139] Table 3

[0140]

[0141]

[0142] Table 4 gives the high-order coefficients of the various aspherical mirror surfaces of the seventh lens L7 that can be used in Example 2, wherein the surface shapes of the various aspherical surfaces can be defined by the formulas given in Example 1.

[0143] Table 4

[0144]

[0145] See also Figure 4 ,Depend on Figure 4 It can be seen from the spherical aberration diagram (A), the light astigmatism diagram (B), and the distortion diagram (C) in FIG. 1 that the spherical aberration, astigmatism, and distortion of the optical lens 100 are well controlled, so that the optical lens 100 of this embodiment has good imaging quality. Figure 4 (A) Figure 4 (B) and Figure 4 The wavelengths corresponding to the curves in (C) can be referred to in Example 1. Figure 2 (A) Figure 2 (B) Figure 2 The contents 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 Example 3 of the present application. Specifically, taking the effective focal length parameter F=3.778mm of the optical lens 100, the aperture number FNO=1.43 of the optical lens 100 and the maximum field angle FOV=156deg of the optical lens 100 as examples, other parameters of the optical lens 100 are given in the following Table 5. The definition of each parameter can be derived from the description of the aforementioned embodiment 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 serial numbers of each lens and the object side and image side of each lens, please refer to the aforementioned Example 1, which will not be repeated here.

[0148] Table 5

[0149]

[0150]

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

[0152] Table 6

[0153]

[0154]

[0155] See also Figure 6 ,Depend on Figure 6 It can be seen from the spherical aberration diagram (A), the light astigmatism diagram (B), and the distortion diagram (C) in FIG. 1 that the spherical aberration, astigmatism, and distortion of the optical lens 100 are well controlled, so that the optical lens 100 of this embodiment has good imaging quality. Figure 6 (A) Figure 6 (B) and Figure 6 The wavelengths corresponding to the curves in (C) can be referred to in Example 1. Figure 2 (A) Figure 2 (B) Figure 2 The contents 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 Example 4 of the present application. Specifically, taking the effective focal length parameter F=3.921mm of the optical lens 100, the aperture number FNO=1.505 of the optical lens 100 and the maximum field angle FOV=150deg of the optical lens 100 as examples, other parameters of the optical lens 100 are given in the following Table 7. The definition of each parameter can be derived from the description of the aforementioned embodiment 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 serial numbers of each lens and the object side and image side of each lens, please refer to the aforementioned Example 1, which will not be repeated here.

[0158] Table 7

[0159]

[0160]

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

[0162] Table 8

[0163]

[0164] See also Figure 8 ,Depend on Figure 8 It can be seen from the spherical aberration diagram (A), the light astigmatism diagram (B), and the distortion diagram (C) in FIG. 1 that the spherical aberration, astigmatism, and distortion of the optical lens 100 are well controlled, so that the optical lens 100 of this embodiment has good imaging quality. Figure 8 (A) Figure 8 (B) and Figure 8 The wavelengths corresponding to the curves in (C) can be referred to in Example 1. Figure 2 (A) Figure 2 (B) Figure 2 The contents described in (C) will not be repeated here.

[0165] Example 5

[0166] Fig. 9This is a schematic diagram of the structure of the optical lens 100 disclosed in Example 5 of the present application. Specifically, taking the effective focal length parameter F=3.942mm of the optical lens 100, the aperture number FNO=1.45 of the optical lens 100 and the maximum field angle FOV=160deg of the optical lens 100 as examples, other parameters of the optical lens 100 are given in the following Table 9. The definition of each parameter can be derived from the description of the aforementioned embodiment 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 serial numbers of each surface of each lens and the object side and image side of each lens, please refer to the aforementioned Example 1, which will not be repeated here.

[0167] Table 9

[0168]

[0169] Table 10 gives the high-order coefficients of the various aspherical mirror surfaces of the seventh lens L7 that can be used in Example 5, wherein the surface shapes of the various aspherical surfaces can be defined by the formulas given in Example 1.

[0170] Table 10

[0171]

[0172]

[0173] See also Fig.10 ,Depend on Fig.10 It can be seen from the spherical aberration diagram (A), the light astigmatism diagram (B), and the distortion diagram (C) in FIG. 1 that the spherical aberration, astigmatism, and distortion of the optical lens 100 are well controlled, so that the optical lens 100 of this embodiment has good imaging quality. Fig.10 (A) Fig.10 (B) and Fig.10 The wavelengths corresponding to the curves in (C) can be referred to in Example 1. Figure 2 (A) Figure 2 (B) Figure 2 The contents described in (C) will not be repeated here.

[0174] Please refer to Table 11, which is a summary of the ratios of various relationship equations in the first to fifth embodiments of the present application.

[0175] Table 11

[0176]

[0177]

[0178] See also Fig.11The present application also discloses a camera module 200, which includes an image sensor 201 and an optical lens 100 as described in any one of the above embodiments 1 to 5, wherein the image sensor 201 is arranged 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 of the object incident on the photosensitive surface through the lens can be converted into an electrical signal of the image. The image sensor 201 can be a complementary metal oxide semiconductor (CMOS) or a charge coupled device (CCD). The camera module 200 can be an imaging module integrated on the terminal device 300, or it can be an independent lens. It can be understood that the camera module 200 with the above optical lens 100 has all the technical effects of the above optical lens 100, that is, the camera module 200 can meet the requirements of a large field of view, a large aperture and a high relative illumination while taking into account the requirements of a miniaturized design. Since the above technical effects have been described in detail in the embodiment of the optical lens 100, they will not be described again here.

[0179] The present application also discloses a terminal device 300, which includes a housing 301 and the camera module 200, wherein the camera module 200 is disposed in the housing 301. The terminal device 300 may include but is not limited to a mobile phone, a tablet computer, a laptop computer, a smart watch, a vehicle-mounted device, a drone, a monitor, etc. Fig.12 Taking the terminal device 300 as a vehicle as an example, the shell 301 can be a vehicle body, and the camera module 200 can be set on the vehicle body, for example, inside the vehicle body or outside the vehicle body.

[0180] It can be understood that the terminal device 300 having the above-mentioned camera module 200 also has all the technical effects of the above-mentioned optical lens 100. That is, the terminal device 300 can meet the requirements of a large field of view, a large aperture and a high relative illumination while taking into account the requirements of a miniaturized design. Since the above-mentioned technical effects have been described in detail in the embodiment 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 the present application are introduced in detail above. Specific examples are used in this article to illustrate the principles and implementation methods of the present application. The description of the above embodiments is only used to help understand the optical lens, camera module and terminal device of the present application and its core idea; at the same time, for general technical personnel in this field, according to the ideas of the present application, there will be changes in the specific implementation methods and application scope. In summary, the content of this specification should not be understood as a limitation on the present application.

Claims

1. An optical lens, characterized in that: There are 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, which are arranged in sequence from the object side to the image side along the optical axis; The first lens has negative refractive power, the object side surface of the first lens is convex at the near optical axis, and the image side surface of the first lens is concave at the near optical axis; The second lens has negative refractive power, the object side surface of the second lens is concave at the near optical axis, and the image side surface of the second lens is convex at the near optical axis; The third lens has positive refractive power, the object side surface of the third lens is convex at the near optical axis, and the image side surface of the third lens is concave at the near optical axis; The fourth lens has positive refractive power, and the object side surface and the image side surface of the fourth lens are both convex surfaces near the optical axis; The fifth lens has positive refractive power, and the object side surface and the image side surface of the fifth lens are both convex surfaces near the optical axis; The sixth lens has negative refractive power, the object side surface of the sixth lens is concave at the near optical axis, and the image side surface of the sixth lens is convex at the near optical axis; The seventh lens has positive refractive power, the object side surface of the seventh lens is convex at the near optical axis, and the image side surface of the seventh lens is concave at the near optical axis; The optical lens satisfies the following relationship: 150deg≤FOV≤160deg and 1.4≤FNO≤1.55; Among them, FOV is the maximum field of view of the optical lens, and FNO is the aperture number 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, 6.5≤TTL / IMGH≤7.7, and / or, 0.8≤BFL / F≤1.1; Among them, 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 of the image height corresponding to the maximum field of view angle 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.

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; Among them, R3 is the curvature radius of the object side of the second lens at the optical axis, R4 is the curvature radius 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; Among them, 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; Among them, 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 lens and the sixth lens, SD8 is half of the maximum effective aperture of the image side surface of the fourth lens, SD9 is half of the maximum effective aperture of the object side surface of the fifth lens, SD13 is half of the maximum effective aperture of the object side surface of the seventh lens, and SD12 is half of the maximum effective aperture of the image side surface 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, 0.4≤CT3 / CT34≤3, and / or, 1.4≤CT7 / CT67≤2.7; Among them, TTL is the distance from the object side surface of the first lens to the imaging surface of the optical lens in the optical axis direction, CT6 is the thickness of the sixth lens on the optical axis, CT7 is the thickness of the seventh lens on the optical axis, CT3 is the thickness of the third lens on the optical axis, CT34 is the distance from the image side surface of the third lens to the object side surface of the fourth lens on the optical axis, and CT67 is the distance from the image side surface of the sixth lens to the object side surface of the seventh lens on the optical axis.

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; Among them, R1 is the curvature radius of the object side of the first lens at the optical axis, R2 is the curvature radius of the image side of the first lens at the optical axis, R9 is the curvature radius of the object side of the fifth lens at the optical axis, R10 is the curvature radius 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 parallel to 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; Among them, 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 of 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 of the maximum effective aperture of the object side of the first lens, and tan(FOV / 2) is the tangent value 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 to 8, and the image sensor is arranged on the image side of the optical lens.

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

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