Optical lens, camera module and terminal equipment

Abstract

The invention discloses an optical lens, a camera module and terminal equipment, and the optical lens comprises seven lenses, the first lens has negative refractive power, and the object side surface and the image side surface of the first lens are a convex surface and a concave surface respectively; the second lens element with negative refractive power has a concave object-side surface and a convex image-side surface, respectively. The third lens element with positive refractive power has a convex object-side surface and a convex image-side surface. The fourth lens element with positive refractive power has a convex image-side surface. The fifth lens element with positive refractive power has a convex object-side surface and a convex image-side surface. The sixth lens element with negative refractive power has a concave object-side surface and a concave image-side surface. The seventh lens element with positive refractive power has a convex object-side surface and a concave image-side surface, respectively. The optical lens satisfies the following relational expressions: 1.6 < = FNO < = 1.8, 125deg < = FOV < = 135deg and 5lt. TTL / Flt; and 6.5. According to the optical lens, the camera module and the terminal equipment, the requirements of large field angle, high relative illumination and miniaturization design can be met.

Description

Technical Field

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

[0002] With the rapid development of autonomous driving assistance systems, the performance requirements for forward-looking optical lenses are becoming increasingly higher, and are developing towards high resolution, large field of view and small distortion. At the same time, as the requirements for night driving in autonomous driving gradually increase, the requirements for night vision functions of vehicle-mounted lenses are also becoming higher and higher.

[0003] However, the optical lenses currently used have serious aberration problems such as chromatic aberration, astigmatism, distortion, etc., cannot adapt to dark environments at night or on rainy days, and cannot meet the requirements of miniaturization at the same time. Summary of the invention

[0004] The embodiments of the present application disclose an optical lens, a camera module and a terminal device, which can meet the requirements of a large field of view, high relative illumination and a miniaturized design.

[0005] In order to achieve the above-mentioned purpose, in a first aspect, the present application discloses an optical lens, which has seven lenses with refractive power, including a first lens, a second lens, a third lens, a fourth lens, a fifth lens, a sixth lens, and a seventh lens arranged in sequence from the object side to the image side along the optical axis;

[0006] 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;

[0007] 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;

[0008] The third lens has positive refractive power, and the object side surface and the image side surface of the third lens are both convex surfaces at the near optical axis;

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

[0010] 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;

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

[0012] 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;

[0013] The optical lens satisfies the following relationship:

[0014] 1.6≤FNO≤1.8, 125deg≤FOV≤135deg and 5 <TTL / F<6.5;

[0015] Among them, FOV is the maximum field of view of the optical lens, FNO is the aperture number of the optical lens, TTL is the distance from the object side of the first lens to the imaging surface of the optical lens on the optical axis, that is, the total length of the optical lens, and F is the focal length of the optical lens.

[0016] In the optical lens provided by the present application, in order to meet the requirements of a large field of view, high relative illumination and a miniaturized design, the first lens is set to have a negative refractive power, and the object side and image side are designed to be convex and concave at the near optical axis respectively, which is conducive to receiving light at a larger angle into the optical lens, increasing the field of view, and improving the relative illumination of the edge field of view of the optical lens; the second lens has a negative refractive power, and the object side and image side are designed to be concave and convex at the near optical axis respectively, which is conducive to more smoothly receiving the deflected light and reducing aberrations; the third lens has a positive refractive power, and the object side and image side are designed to be convex at the near optical axis, which is conducive to allowing the divergent light to enter the rear optical lens, balance the aberration and reduce the distortion; the fourth lens has a positive refractive power, and the image side of the fourth lens is The convex surface further plays the role of converging light and reducing the rear port diameter, so as to facilitate miniaturization; the fifth lens has positive refractive power, and the object side surface and image side surface of the fifth lens are convex surfaces at the near optical axis, which is beneficial to reducing the chromatic aberration of the optical lens. At the same time, the positive refractive power of the fifth lens is also beneficial to converge the light and reduce the total length of the optical lens; the sixth lens has negative refractive power, and the object side surface and image side surface of the sixth lens are concave surfaces at the near optical axis. Combined with the positive refractive power of the fifth lens, it is helpful to eliminate chromatic aberration, correct astigmatism, improve resolution, and help to slow down the light deflection angle and reduce the sensitivity of the optical lens; the seventh lens has positive refractive power, and the object side surface and image side surface of the seventh lens are convex and concave surfaces at the near optical axis respectively, which smoothly transition the light to the imaging surface, correct astigmatism and field curvature, and improve the resolution ability of the optical lens.

[0017] The optical lens satisfies the relationship 1.6≤FNO≤1.8. By limiting 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.

[0018] The optical lens satisfies the relationship 125deg ≤ FOV ≤ 135deg. By reasonably setting the maximum field of view angle of the optical lens, sufficient field of view angle can be provided for the optical lens to meet the large field of view angle requirements of the optical lens.

[0019] The optical lens satisfies the relationship 5 < TTL / F < 6.5, which enables the optical lens to have a reasonable focal length without causing the overall length of the optical lens to be too long, facilitating the miniaturization of the optical lens.

[0020] As an optional implementation manner, in the embodiment of the first aspect of the present application, the optical lens satisfies the following relationship:

[0021] 1.1 < F / IMGH < 1.3, and / or, 1.2 < IMGH / EPD < 1.4;

[0022] Wherein, IMGH is half of the image height corresponding to the maximum field of view angle of the optical lens, and EPD is the entrance pupil diameter of the optical lens.

[0023] As an optional implementation manner, in the embodiment of the first aspect of the present application, the optical lens satisfies the following relationship:

[0024] 70deg < FOV / FNO < 85deg, and / or, 145 < FOV*F / IMGH < 180;

[0025] Wherein, IMGH is half of the image height corresponding to the maximum field of view angle of the optical lens.

[0026] As an optional implementation manner, in the embodiment of the first aspect of the present application, the optical lens satisfies the following relationship:

[0027] 3 < CT MAX / CT MIN < 7, and / or, 2.5 < ∑CT / ∑AT < 4.5, and / or, -7 < F6 / CT6 < -5;

[0028] Wherein, CT MAX is the maximum thickness on the optical axis among the first lens to the seventh lens, CT MIN is the minimum thickness on the optical axis among the first lens to the seventh lens, ∑CT is the sum of the thicknesses of all the lenses from the first lens to the seventh lens on the optical axis, ∑AT is the sum of the air gaps between adjacent two lenses from the first lens to the seventh lens, F6 is the focal length of the sixth lens, and CT6 is the thickness of the sixth lens on the optical axis.

[0029] As an optional implementation manner, in the embodiment of the first aspect of the present application, the optical lens satisfies the following relationship:

[0030] 1.3 < SAG2 / SAG1 < 3.5, and / or, 3 < |SAG13 / SAG14| < 20, and / or, 1.1 < CT4 / ET4 < 1.4, and / or, 1.4 < CT7 / ET7 < 1.8;

[0031] Wherein, SAG1 is the distance from the intersection of the object side surface of the first lens and the optical axis to the maximum effective aperture of the object side surface of the first lens on the optical axis, that is, the sagittal height of the object side surface of the first lens; SAG2 is the distance from the intersection of the image side surface of the first lens and the optical axis to the maximum effective aperture of the image side surface of the first lens on the optical axis, that is, the sagittal height of the image side surface of the first lens; SAG13 is the distance from the intersection of the object side surface of the seventh lens and the optical axis to the maximum effective aperture of the object side surface of the seventh lens on the optical axis, that is, the sagittal height of the object side surface of the seventh lens; SAG14 is the distance from the intersection of the image side surface of the seventh lens and the optical axis to the maximum effective aperture of the image side surface of the seventh lens on the optical axis, that is, the sagittal height of the image side surface of the seventh lens; CT4 is the thickness of the fourth lens on the optical axis; ET4 is the distance from the maximum effective aperture of the object side surface of the fourth lens to the maximum effective aperture of the image side surface of the fourth lens in the optical axis direction, that is, the edge thickness of the fourth lens; CT7 is the thickness of the seventh lens on the optical axis; ET7 is the distance from the maximum effective aperture of the object side surface of the seventh lens to the maximum effective aperture of the image side surface of the seventh lens in the optical axis direction, that is, the edge thickness of the seventh lens.

[0032] As an optional implementation manner, in the embodiment of the first aspect of the present application, the optical lens satisfies the following relational expressions:

[0033] 1 < SD1 / SD14 < 1.32, and / or, 1 < SD1 / IMGH < 1.32, and / or, 0.85 < SD6 / CT3 < 1.5;

[0034] Wherein, SD1 is half of the maximum effective aperture of the object side surface of the first lens; SD14 is half of the maximum effective aperture of the image side surface of the seventh lens; IMGH is half of the image height corresponding to the maximum field of view angle of the optical lens; SD6 is half of the maximum effective aperture of the image side surface of the third lens; CT3 is the thickness of the third lens on the optical axis.

[0035] As an optional implementation manner, in the embodiment of the first aspect of the present application, the optical lens satisfies the following relational expressions:

[0036] 1.5 < F / BFL < 2, and / or, 1 < F5 / F < 2, and / or, 2 < F7 / F < 4;

[0037] Among them, BFL is the distance from the image side of the seventh lens to the imaging surface on the optical axis, that is, the back focal length, F5 is the focal length of the fifth lens, and F7 is the focal length of the seventh lens.

[0038] As an optional implementation manner, in the embodiment of the first aspect of the present application, the optical lens satisfies the following relational expressions:

[0039] 1 < R1 / R2 < 3, and / or, -10 < (R5 - R6) / (R5 + R6) < 0, and / or, |(R7 - R8) / (R7 + R8)| < 3, and / or, 2 < R14 / R13 < 6;

[0040] Among them, R1 is the curvature radius of the object side of the first lens on the optical axis, R2 is the curvature radius of the image side of the first lens on the optical axis, R5 is the curvature radius of the object side of the third lens on the optical axis, R6 is the curvature radius of the image side of the third lens on the optical axis, R7 is the curvature radius of the object side of the fourth lens on the optical axis, R8 is the curvature radius of the image side of the fourth lens on the optical axis, R13 is the curvature radius of the object side of the seventh lens on the optical axis, and R14 is the curvature radius of the image side of the seventh lens on the optical axis.

[0041] In a second aspect, the present application discloses an imaging module, which includes an image sensor and the optical lens as described in the first aspect above, and the image sensor is disposed on the image side of the optical lens.

[0042] In a third aspect, the present application discloses a terminal device, which includes a housing and the imaging module as described in the second aspect above, and the imaging module is disposed in the housing.

[0043] Compared with the prior art, the beneficial effects of the present application are as follows:

[0044] In the optical lens provided by the present application, in order to meet the requirements of a large field of view, high relative illumination, and a compact design, the first lens is set to have a negative refractive power. With the design that its object side and image side are convex and concave respectively near the optical axis, it is beneficial to receive light at a larger angle into the optical lens, increase the field of view, and improve the relative illumination of the edge field of view of the optical lens; the second lens has a negative refractive power. With the design that its object side and image side are concave and convex respectively near the optical axis, it is beneficial to smoothly承接 the deflected light and reduce aberration; the third lens has a positive refractive power. With the design that its object side and image side are convex near the optical axis, it is beneficial to make the diverging light enter the subsequent optical lens, balance aberration, and reduce distortion; the fourth lens has a positive refractive power. The image side of the fourth lens is convex near the optical axis, further playing a role in converging light and reducing the rear aperture, so as to facilitate the realization of miniaturization; the fifth lens has a positive refractive power. The object side and image side of the fifth lens are convex near the optical axis, which is beneficial to reducing the chromatic aberration of the optical lens. At the same time, the positive refractive power of the fifth lens is also beneficial to converging light and reducing the total length of the optical lens; the sixth lens has a negative refractive power. The object side and image side of the sixth lens are concave near the optical axis. Combined with the positive refractive power of the fifth lens, it helps to eliminate chromatic aberration, correct astigmatism, improve resolution, and helps to slow down the light deflection angle and reduce the sensitivity of the optical lens; the seventh lens has a positive refractive power. The object side and image side of the seventh lens are convex and concave respectively near the optical axis, smoothly transitioning the light to the imaging surface, correcting astigmatism and field curvature, and improving the resolution ability of the optical lens.

[0045] The optical lens satisfies the relationship 1.6 ≤ FNO ≤ 1.8. By limiting the aperture number of the optical lens, the light transmission ability of the optical lens can be improved, making the relative illumination of the optical lens higher, so that it also has good imaging quality in darker environments such as at night or on rainy and cloudy days, meeting the requirements of a large aperture and high resolution.

[0046] The optical lens satisfies the relationship 125deg ≤ FOV ≤ 135deg. By reasonably setting the maximum field of view angle of the optical lens, sufficient field of view angle can be provided for the optical lens to meet the large field of view angle requirements of the optical lens.

[0047] The optical lens satisfies the relationship 5 < TTL / F < 6.5, so that the optical lens has a reasonable focal length without causing a long total length of the optical lens, which is beneficial to the realization of the miniaturization of the optical lens. Brief Description of the Drawings

[0048] 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 paying creative work.

[0049] Figure 1 is a schematic structural diagram of the optical lens disclosed in Example 1 of the present application;

[0050] 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;

[0051] Figure 3 is a schematic structural diagram of the optical lens disclosed in Example 2 of the present application;

[0052] 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;

[0053] Figure 5 is a schematic diagram of the structure of the optical lens disclosed in Example 3 of the present application;

[0054] 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;

[0055] Figure 7 is a schematic structural diagram of the optical lens disclosed in Example 4 of the present application;

[0056] 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;

[0057] Fig. 9 is a schematic structural diagram of the optical lens disclosed in Example 5 of the present application;

[0058] 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;

[0059] Fig.11 is a schematic structural diagram of the optical lens disclosed in Example 6 of the present application;

[0060] Fig.12 is the spherical aberration diagram (mm), astigmatism diagram (mm) and distortion diagram (%) of the optical lens disclosed in Example 6 of the present application;

[0061] Fig.13is a schematic structural diagram of the optical lens disclosed in Example 7 of the present application;

[0062] Fig.14 is the spherical aberration diagram (mm), astigmatism diagram (mm) and distortion diagram (%) of the optical lens disclosed in Example 7 of the present application;

[0063] Fig.15 It is a structural schematic diagram of the camera module disclosed in this application;

[0064] Fig.16 It is a structural schematic diagram when the terminal device disclosed in this application is a car. DETAILED DESCRIPTION

[0065] 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.

[0066] In this application, the directions or positional relationships indicated by the terms "inside", "outside", "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.

[0067] 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.

[0068] In addition, the terms "disposed", "provided with", and "connected" 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.

[0069] 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.

[0070] The technical solution of the present application will be further described below in conjunction with embodiments and drawings.

[0071] See also Figure 1 In the optical lens 100 disclosed in the embodiment of the present application, 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 are sequentially arranged along the optical axis from the object side to the image side. 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.

[0072] Among them, the first lens L1 has negative refractive power, the second lens L2 has negative refractive power, the third lens L3 has positive refractive power, the fourth lens L4 has positive refractive power, the fifth lens L5 has positive refractive power, the sixth lens L6 has negative refractive power, and the seventh lens L7 has positive refractive power.

[0073] Further, the object side surface 11 of the first lens L1 is convex at the near optical axis, and the image side surface 12 of the first lens L1 is concave at the near optical axis; the object side surface 21 of the second lens L2 is concave at the near optical axis, and the image side surface 22 of the second lens L2 is convex at the near optical axis; the object side surface 31 of the third lens L3 is convex at the near optical axis, and the image side surface 32 of the third lens L3 is convex at the near optical axis; the object side surface 41 of the fourth lens L4 may be convex at the near optical axis The image side surface 42 of the fourth lens L4 is convex at the near optical axis; the object side surface 51 of the fifth lens L5 is convex at the near optical axis, and the image side surface 52 of the fifth lens L5 is convex at the near optical axis; the object side surface 61 of the sixth lens L6 is concave at the near optical axis, and the image side surface 62 of the sixth lens L6 is concave at the near optical axis; the object side surface 71 of the seventh lens L7 is convex at the near optical axis, and the image side surface 72 of the seventh lens L7 is concave at the near optical axis.

[0074] In the optical lens 100 provided in the present application, in order to meet the requirements of a large field of view, high relative illumination and a miniaturized design, the first lens L1 is set to have a negative refractive power, and its object side and image side are designed to be convex and concave at the near optical axis, respectively, which is conducive to receiving light at a larger angle into the optical lens 100, increasing the field of view, and improving the relative illumination of the edge field of view of the optical lens 100.

[0075] The second lens L2 has negative refractive power, and its object side surface and image side surface are respectively concave and convex at the near optical axis, which is conducive to more smoothly receiving the deflected light and reducing aberrations.

[0076] The third lens L3 has positive refractive power, and its object side surface and image side surface are both convex at the near optical axis, which is beneficial for the divergent light to enter the rear optical lens 100, balance the aberration and reduce the distortion.

[0077] The fourth lens L4 has positive refractive power, and the image side surface of the fourth lens L4 is convex at the near optical axis, which further plays a role in converging light and reducing the rear port diameter to facilitate miniaturization.

[0078] The fifth lens L5 has positive refractive power, and the object side surface and image side surface of the fifth lens L5 are both convex at the near optical axis, which is beneficial to reducing the chromatic aberration of the optical lens 100. At the same time, the fifth lens L5 has positive refractive power and is also beneficial to focusing light and reducing the overall length of the optical lens 100.

[0079] The sixth lens L6 has negative refractive power. The object side surface and the image side surface of the sixth lens L6 are both concave near the optical axis. Together with the positive refractive power of the fifth lens L5, it helps to eliminate chromatic aberration, correct astigmatism, improve resolution, and help to reduce the light deflection angle, thereby reducing the sensitivity of the optical lens 100.

[0080] The seventh lens L7 has positive refractive power. The object-side surface and image-side surface of the seventh lens L7 are convex and concave respectively near the optical axis, which smoothly transitions light to the imaging surface, corrects astigmatism and field curvature, and improves the resolution of the optical lens 100.

[0081] 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.

[0082] Optionally, the first lens L1, the third lens L3, and the seventh lens L7 can be aspherical lenses, and the second lens L2, the fourth lens L4, the fifth lens L5, and the sixth lens L6 can be aspherical lenses. The combination of spherical lenses and aspherical lenses can improve high-order aberrations and thereby improve the imaging quality of the optical lens 100.

[0083] In some embodiments, the optical lens 100 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 32 of the third lens L3 and the object side surface 41 of the fourth lens L4 of the optical lens 100, or between the image side surface 42 of the fourth lens L4 and the object side surface 51 of the fifth lens L5. 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.

[0084] In some embodiments, the optical lens 100 further includes a filter 110, and the filter 110 can be disposed between the image side surface 72 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.

[0085] 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 during subsequent assembly, thereby playing a protective role.

[0086] In one embodiment, the optical lens 100 satisfies the relationship 1.6≤FNO≤1.8, where FNO is the aperture number of the optical lens 100. By limiting the aperture number of the optical lens 100, the light transmission capability 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.

[0087] In one embodiment, the optical lens 100 satisfies the relation 125deg ≤ FOV ≤ 135deg, where FOV is the maximum field of view angle of the optical lens 100. By reasonably setting the maximum field of view angle of the optical lens 100, sufficient field of view angle can be provided for the optical lens 100 to meet the requirements of the large field of view angle of the optical lens 100.

[0088] In one embodiment, the optical lens 100 satisfies the relation 5 < TTL / F < 6.5, where TTL is the total length of the optical lens 100 and F is the focal length of the optical lens 100. Meeting the above relation enables the optical lens 100 to have a reasonable focal length without causing the total length of the optical lens 100 to be too long, which is beneficial to the miniaturization of the optical lens 100.

[0089] In one embodiment, the optical lens 100 satisfies the relation 1.1 < F / IMGH < 1.3, where F is the focal length of the optical lens 100 and IMGH is half of the image height corresponding to the maximum field of view angle of the optical lens 100. By reasonably configuring the ratio of the focal length of the optical lens 100 to the half image height, it is beneficial for the optical lens 100 to meet the imaging requirements of high definition, and at the same time, it is beneficial to realize shooting within a large field of view range of the optical lens 100. When the optical lens 100 exceeds the upper limit of the above relation, 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 relation, the focal length of the optical lens 100 is too short, which is not conducive to the long focal length function of the optical lens 100, resulting in insufficient shooting clarity of distant scenes and affecting the imaging effect.

[0090] In one embodiment, the optical lens 100 satisfies the relation 1.2 < IMGH / EPD < 1.4, where IMGH is half of the image height corresponding to the maximum field of view angle of the optical lens 100 and EPD is the entrance pupil diameter of the optical lens 100. Meeting this relation is beneficial to realizing large target surface imaging and improving the image plane brightness of the optical lens 100. When the optical lens 100 exceeds the upper limit of the above relation, the entrance pupil diameter of the optical lens 100 is small, which reduces the width of the light beam incident on the optical lens 100 and is not conducive to the improvement of the image plane brightness; when the optical lens 100 is lower than the lower limit of the above relation, the image plane area of the optical lens 100 is small, which reduces the field of view range of the optical lens 100 and is not conducive to matching with the chip, and it is easy to produce vignetting.

[0091] In one embodiment, the optical lens 100 satisfies the relationship 70deg < FOV / FNO < 85deg, where FOV is the maximum field of view angle of the optical lens 100 and FNO is the f-number of the optical lens 100. By reasonably controlling the relationship between the field of view angle and the f-number of the optical lens 100, a reasonable field of view angle and f-number are provided for the optical lens 100, which can balance the design difficulty and the requirement of the field of view angle. At the same time, the aperture changes within a reasonable range, providing a combined effect of a large viewing angle and a large aperture, and meeting the characteristics of the optical lens 100 having a large aperture, high relative illumination, and small distortion.

[0092] In one embodiment, the optical lens 100 satisfies the relationship 145 < FOV*F / IMGH < 180, where FOV is the maximum field of view angle of the optical lens 100, F is the focal length of the optical lens 100, and IMGH is half of the image height corresponding to the maximum field of view angle of the optical lens 100. Through the above relationship, it is possible to satisfy a long focal length and a large field of view angle, which is beneficial for the optical lens 100 to balance the large field of view angle and the large image height effect. When the optical lens 100 exceeds the upper limit of the above relationship, the maximum image height of the optical lens 100 becomes smaller, resulting in a reduction in the field of view range of the optical lens 100, which is not conducive to achieving the large image height effect; when the optical lens 100 is lower than the lower limit of the above relationship, the field of view angle of the optical lens 100 becomes smaller, and the field of view angle required for the front view and main field of view cameras cannot be achieved, which is not conducive to realizing the wide-angle characteristic of the optical lens 100.

[0093] In one embodiment, the optical lens 100 satisfies the relationship 3 < CT MAX / CT MIN < 7, CT MAX is the maximum thickness on the optical axis among the first lens L1 to the seventh lens L7, and CT MIN is the minimum thickness on the optical axis among the first lens L1 to the seventh lens L7. By reasonably setting the relationship between CT MAX and CT MIN , the thickness distribution of the lens can be made more uniform, which is beneficial to improving the spatial layout and processability of the optical lens 100. More preferably, the optical lens 100 can satisfy the relationship 3.5 < CT MAX / CT MIN < 6.8, making the spatial layout of the optical lens 100 more reasonable.

[0094] In one embodiment, the optical lens 100 satisfies the relational expression 2.5 < ∑CT / ∑AT < 4.5, where ∑CT is the sum of the thicknesses of all the lenses from the first lens L1 to the seventh lens L7 on the optical axis, and ∑AT is the sum of the air gaps between adjacent two of the lenses from the first lens L1 to the seventh lens L7. By reasonably controlling the ratio relationship between the sum of the thicknesses of all the lenses on the optical axis and the sum of the air gaps between adjacent two of the lenses from the first lens L1 to the seventh lens L7, the overall structure of the optical lens 100 becomes more compact, which is conducive to shortening the total length of the optical lens 100, thereby realizing miniaturization of the optical lens 100. When the optical lens 100 exceeds the above relational expression, the total thickness of the first lens L1 to the seventh lens L7 on the optical axis is too large, which is not conducive to miniaturization of the optical lens 100; when the optical lens 100 is lower than the lower limit of the above relational expression, the sum of the air gaps between adjacent two of the lenses from the first lens L1 to the seventh lens L7 increases, and the field curvature increases, which is not conducive to improving the imaging quality of the optical lens 100. More preferably, the optical lens 100 can satisfy the relational expression 2.8 < ∑CT / ∑AT < 4.3, which is more conducive to shortening the total length of the optical lens 100.

[0095] In one embodiment, the optical lens 100 satisfies the relational expression -8 < F1 / CT1 < -4, where F1 is the focal length of the first lens L1, and CT1 is the thickness of the first lens L1 on the optical axis. By reasonably controlling the ratio relationship between the focal length of the first lens L1 and the thickness of the first lens L1, it is conducive to reasonably configuring the refractive power of the first lens L1, effectively controlling the angle of light entering the first lens L1, and thus being conducive to correcting aberrations.

[0096] In one embodiment, the optical lens 100 satisfies the relational expression -25 < F2 / CT2 < -2, 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 relational expression enables the refractive power of the second lens L2 to cooperate with the refractive power of the first lens L1 to correct spherical aberration, so that the optical lens 100 has good imaging quality.

[0097] In one embodiment, the optical lens 100 satisfies the relational expression 3 < F3 / CT3 < 6, 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. It can reasonably configure the refractive power of the third lens L3, effectively control the deflection angle of light in the optical lens 100, and further reduce the sensitivity of the optical lens 100 and improve the resolution of the optical lens 100.

[0098] In one embodiment, the optical lens 100 satisfies the relational expression 2 < F4 / CT4 < 9, 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. It effectively controls the deflection angle of light entering the fourth lens L4, and further reduces the sensitivity of the optical lens 100, which is more conducive to improving the imaging quality.

[0099] In one embodiment, the optical lens 100 satisfies the relation 2 < F5 / CT5 < 4, 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, such that the fifth lens L5 can cooperate with the fourth lens L4 to balance high-order aberrations and improve the imaging quality of the optical lens 100. More preferably, the optical lens 100 can satisfy the relation 2 < F5 / CT5 < 3.3, making the imaging quality of the optical lens 100 better.

[0100] In one embodiment, the optical lens 100 satisfies the relation -7 < F6 / CT6 < -5, such that the refractive power of the sixth lens L6 is moderate, and it can cooperate with the fifth lens L5 to balance high-order aberrations and improve the imaging quality of the optical lens 100.

[0101] In one embodiment, the optical lens 100 satisfies the relation 3 < F7 / CT7 < 8, 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, and can reduce the tolerance sensitivity of the seventh lens L7 and the processing difficulty of the manufacturing process, which is beneficial to improving the assembly yield of the optical lens 100.

[0102] In one embodiment, the optical lens 100 satisfies the relation 1.3 < SAG2 / SAG1 < 3.5, where SAG1 is the sag of the object side surface of the first lens L1 and SAG2 is the sag of the image side surface of the first lens L1. Under this relation, it is beneficial to realize the characteristic that the front aperture of the optical lens 100 is small.

[0103] In one embodiment, the optical lens 100 satisfies the relation 3 < |SAG13 / SAG14| < 20, where SAG13 is the sag of the object side surface of the seventh lens L7 and SAG14 is the sag of the image side surface of the seventh lens L7. Satisfying the above relation enables the shape of the seventh lens L7 to be well controlled, which is beneficial to the molding and processing of the seventh lens L7. At the same time, it can also trim the field curvature generated by each lens on the object side to ensure the balance of the field curvature of the optical lens 100.

[0104] In one embodiment, the optical lens 100 satisfies the relation 1.1 < CT4 / ET4 < 1.4, where CT4 is the thickness of the fourth lens L4 on the optical axis and ET4 is the edge thickness of the fourth lens L4. The thickness ratio of the fourth lens L4 can be reasonably controlled, thereby optimizing the surface shape of the fourth lens L4, which is beneficial to the effective convergence of large-angle incident light, and making the light passing through the fourth lens L4 have a small deflection angle, so as to reduce the generation of stray light and ensure good imaging performance.

[0105] In one embodiment, the optical lens 100 satisfies the relation 1.4 < CT7 / ET7 < 1.8, where CT7 is the thickness of the seventh lens L7 on the optical axis and ET7 is the edge thickness of the seventh lens L7. By controlling the ratio of the thickness of the seventh lens L7 on the optical axis to the edge thickness, not only can the high-order aberrations generated by the optical lens 100 be effectively balanced, but also the field curvature adjustment of the seventh lens L7 is facilitated, thereby improving the imaging quality of the optical lens 100.

[0106] In one embodiment, the optical lens 100 satisfies the relation 1 < SD1 / SD14 < 1.32, where SD1 is half of the maximum effective aperture of the object side surface of the first lens L1 and SD14 is half of the maximum effective aperture of the image side surface of the seventh lens L7. This is conducive to controlling the shapes of the first lens L1 and the seventh lens L7, making the overall structure of the optical lens 100 transition smoothly without large steps, thereby facilitating the improvement of the imaging quality of the optical lens 100.

[0107] In one embodiment, the optical lens 100 satisfies the relation 1 < SD1 / IMGH < 1.32, where SD1 is half of the maximum effective aperture of the object side surface of the first lens L1 and IMGH is half of the image height corresponding to the maximum field of view angle of the optical lens 100. Under this relation, the image height of the optical lens 100 can be effectively controlled to meet the requirements of high pixels and good image quality of the optical lens 100.

[0108] In one embodiment, the optical lens 100 satisfies the relation 0.85 < SD6 / CT3 < 1.5, where CT3 is the thickness of the third lens L3 on the optical axis and SD6 is half of the maximum effective aperture of the image side surface of the third lens L3. By controlling the ratio of the maximum effective semi-aperture of the image side surface 32 of the third lens L3 to the central thickness, the large-angle emergence of light passing through the third lens L3 can be effectively controlled, increasing the effective light transmission aperture and facilitating the increase of the image plane, thereby achieving a large image plane effect. When the optical lens 100 exceeds the upper limit of the above relation, the maximum effective semi-aperture of the image side surface 32 of the third lens L3 is too large, which is not conducive to controlling the width of the third lens L3 perpendicular to the optical axis and increases the risk of ghost images; when the optical lens 100 is lower than the lower limit of the above relation, the central thickness of the third lens L3 increases, which is not conducive to the structural compactness of the optical lens 100.

[0109] In one embodiment, the optical lens 100 satisfies the relation 1.5 < F / BFL < 2, where F is the focal length of the optical lens 100 and BFL is the distance from the image side of the seventh lens L7 to the imaging surface on the optical axis (back focal length). By controlling the ratio of the focal length of the optical lens 100 to the back focal length of the optical lens 100, it is beneficial to reasonably control the back focal length and ensure the matching between the lens group and the image sensor. When the optical lens 100 exceeds the upper limit of the above relation, the focal length of the optical lens 100 is too large, which is not conducive to achieving the large field of view required by the optical lens 100. When the optical lens 100 is lower than the lower limit of the above relation, the back focal length of the optical lens 100 is too long, which is not conducive to achieving the large image surface effect.

[0110] In one embodiment, the optical lens 100 satisfies the relations -3 < F1 / F < -1, -20 < F2 / F < -2, 1 < F3 / F < 3, 2 < F4 / F < 4, -1.5 < F6 / F < -1, 1 < F5 / F < 2, 2 < F7 / F < 4, 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 can be made uniform and reasonable, the aberration is easy to correct, and the image quality is good. More preferably, the optical lens 100 can satisfy the relations 1.1 < F5 / F < 1.8, -1.3 < F6 / F < -1, so that the image quality of the optical lens 100 is better.

[0111] In an embodiment, the optical lens 100 satisfies the relational expressions 1 < R1 / R2 < 3, 1 < R4 / R3 < 5, |R6 / R5| > 1, |R7 / R8| < 10, -3 < R9 / R10 < -1, -10 < R12 / R11 < -1, 2 < R14 / R13 < 6, where R1 is the curvature radius of the object side surface 11 of the first lens L1 on the optical axis, R2 is the curvature radius of the image side surface 12 of the first lens L1 on the optical axis, R3 is the curvature radius of the object side surface 21 of the second lens L2 on the optical axis, R4 is the curvature radius of the image side surface 22 of the second lens L2 on the optical axis, R5 is the curvature radius of the object side surface 31 of the third lens L3 on the optical axis, R6 is the curvature radius of the image side surface 32 of the third lens L3 on the optical axis, R7 is the curvature radius of the object side surface 41 of the fourth lens L4 on the optical axis, R8 is the curvature radius of the image side surface 42 of the fourth lens L4 on the optical axis, R9 is the curvature radius of the object side surface 51 of the fifth lens L5 on the optical axis, R10 is the curvature radius of the image side surface 52 of the fifth lens L5 on the optical axis, R11 is the curvature radius of the object side surface 61 of the sixth lens L6 on the optical axis, R12 is the curvature radius of the image side surface 62 of the sixth lens L6 on the optical axis, R13 is the curvature radius of the object side surface 71 of the seventh lens L7 on the optical axis, and R14 is the curvature radius of the image side surface 72 of the seventh lens L7 on the optical axis.

[0112] By satisfying the above relational expressions and rationally matching the ratios between the curvature radii of the object side surfaces and the image side surfaces of each lens on the optical axis, the surface type differences of each lens can be reasonably set, which is beneficial to controlling the shapes of each lens, correcting the aberrations generated by itself, and improving the imaging quality.

[0113] More preferably, the optical lens 100 can satisfy the relational expression 1.5 < R1 / R2 < 2.8, so that the imaging quality of the optical lens 100 is better.

[0114] In an embodiment, the optical lens 100 satisfies the relational expression -10 < (R5 - R6) / (R5 + R6) < 0, where R5 is the curvature radius of the object side surface 31 of the third lens L3 on the optical axis and R6 is the curvature radius of the image side surface 32 of the third lens L3 on the optical axis. Satisfying this relational expression can reasonably set the surface type differences between the object side surface and the image side surface of the third lens L3, reasonably control the shape of the third lens L3, which is beneficial to reducing the sensitivity of the third lens L3 to eccentricity, and thus effectively correcting aberrations. More preferably, the optical lens 100 can satisfy the relational expression -7 < (R5 - R6) / (R5 + R6) < -0.5, so that the effect of aberration correction is better, which is beneficial to improving the imaging quality of the optical lens 100.

[0115] In one embodiment, the optical lens 100 satisfies the relation |(R7 - R8) / (R7 + R8)| < 3, where R7 is the radius of curvature of the object side surface 41 of the fourth lens L4 on the optical axis, and R8 is the radius of curvature of the image side surface 42 of the fourth lens L4 on the optical axis. Satisfying the above relation is beneficial to controlling the shape of the fourth lens L4, correcting the aberration generated by itself, and improving the imaging quality.

[0116] In one embodiment, the optical lens 100 satisfies the relation F56 / F > 4. Satisfying the above relation, where F56 is the combined focal length of the fifth lens L5 and the sixth lens L6, and F is the focal length of the optical lens 100, can reasonably control the refractive power of the combined lens formed by the fifth lens L5 and the sixth lens L6, effectively correct the chromatic aberration and aberration of the optical lens, and enable the optical lens 100 to have good imaging quality.

[0117] In one embodiment, the optical lens 100 satisfies the relation 6.5 < TTL / IMGH < 7.5, where TTL is the total length of the optical lens 100, and IMGH is half of the image height corresponding to the maximum field of view 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 controlling the total length of the optical lens 100, and thus beneficial to realizing the miniaturized design of the optical lens 100.

[0118] In one embodiment, the optical lens 100 satisfies the relation 5 < TTL / CT4 < 14, where TTL is the total length of the optical lens 100, and CT4 is the thickness of the fourth lens L4 on the optical axis. By controlling the ratio of the total length of the optical lens 100 to the thickness of the fourth lens L4 on the optical axis, the thickness of the fourth lens L4 can be controlled, which is beneficial to the reasonable allocation of 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 relation, the total length of the optical lens 100 is too long, which is not conducive to compactness; when the optical lens 100 is lower than the lower limit of the above relation, the fourth lens L4 is too thick, and the risk of light bending increases, which will increase the eccentricity sensitivity between the lenses, thus being not conducive to the assembly of the optical lens 100.

[0119] In one embodiment, the optical lens 100 satisfies the relation 5 < TTL / CT MAX <8, where TTL is the total length of the optical lens 100, and CT MAX is the maximum thickness on the optical axis among the first lens L1 to the seventh lens L7. By controlling the relationship between the maximum thickness of all the lenses and the total optical length, the lens distribution can be made more reasonable, which is beneficial to the overall spatial layout of the optical lens 100.

[0120] In one embodiment, the optical lens 100 satisfies the relational expression 2 < F * tan(FOV / 2) / IMGH < 3.5, where F is the focal length of the optical lens 100, FOV is the maximum field of view angle of the optical lens 100, and IMGH is half of the image height corresponding to the maximum field of view angle of the optical lens 100. When the optical lens 100 exceeds the upper limit of the above relational expression, the maximum image height of the optical lens 100 becomes smaller, resulting in a reduction in the field of view range of the optical lens 100, which is not conducive to achieving the large image height effect; when the optical lens 100 is lower than the lower limit of the above relational expression, the field of view angle of the optical lens 100 becomes smaller, and the required field of view angle for the front view and main field of view cameras cannot be achieved, which is not conducive to realizing the wide-angle characteristic of the optical lens 100. More preferably, the optical lens 100 can satisfy the relational expression 2.3 < F * tan(FOV / 2) / IMGH < 3.3, which is more conducive to realizing the characteristics of large image height and large wide angle of the optical lens 100.

[0121] In one embodiment, the optical lens 100 satisfies the relational expression 0.9 < SD6 / SD7 < 1.2, where SD6 is half of the maximum effective aperture of the image side 32 of the third lens L3, and SD7 is half of the maximum effective aperture of the object side 41 of the fourth lens L4, so that the fourth lens L4 has the characteristic of a small aperture, and can effectively converge the light rays of the third lens L3, enabling the light rays to better enter the imaging surface 101 of the optical lens 100. More preferably, the optical lens 100 can satisfy the relational expression 0.95 < SD6 / SD7 < 1.1, thereby making the light converging effect of the third lens L3 better.

[0122] In one embodiment, the optical lens 100 satisfies the relational expression 4 < ∑CT / (CT5 + CT6) < 6, where ∑CT is the sum of the thicknesses of all the lenses from the first lens L1 to the seventh lens L7 on the optical axis, CT5 is the thickness of the fifth lens L5 on the optical axis, and CT6 is the thickness of the sixth lens L6 on the optical axis. Under this relational expression, it is beneficial to reasonably control the proportion of the sum of the thicknesses of the fifth lens L5 and the sixth lens L6 relative to the sum of the thicknesses of all the lenses on the optical axis, which is conducive to realizing the miniaturized design of the optical lens 100.

[0123] In one embodiment, the optical lens 100 satisfies the relation 7 < TTL / BFL < 9.5, where TTL is the total length of the optical lens 100, and BFL is the distance (back focal length) from the image side 72 of the seventh lens L7 to the imaging surface 101 of the optical lens 100 on the optical axis. By defining the ratio relationship between the total length and the back focal length of the optical lens 100, it is beneficial to reasonably control the total length of the optical lens 100 and achieve a miniaturized design. When the optical lens 100 exceeds the upper limit of the above relation, the total length of the optical lens 100 is too long, which is not conducive to achieving miniaturization; when the optical lens 100 is lower than the lower limit of the above relation, the back focal length of the optical lens 100 is too long, which is not conducive to achieving the large image surface effect of the optical lens 100.

[0124] In one embodiment, the optical lens 100 satisfies the relation 1.2 < TTL / ∑CT < 1.4, where TTL is the total length of the optical lens 100, and ∑CT is the sum of the thicknesses of all lenses from the first lens L1 to the seventh lens L7 on the optical axis. By controlling the ratio of the total length of the optical lens 100 to the sum of the thicknesses of all lenses, the proportion of all lenses in the total length of the optical lens 100 can be controlled, which is beneficial to the reasonable arrangement of all lenses and conducive to achieving the miniaturized design of the optical lens 100.

[0125] The optical lens 100 of this embodiment will be described in detail below with specific parameters.

[0126] Embodiment 1

[0127] Figure 1 FIG. 13 is a schematic structural diagram of the optical lens 100 disclosed in Embodiment 1 of the present application. The optical lens 100 includes a first lens L1, a second lens L2, a third lens L3, a diaphragm 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 sequentially arranged along the optical axis from the object side to the image side. Among them, the object side 11 of the first lens L1 is convex near the optical axis, and the image side 12 of the first lens L1 is concave near the optical axis; the object side 21 of the second lens L2 is concave near the optical axis, and the image side 22 of the second lens L2 is convex near the optical axis; the object side 31 of the third lens L3 is convex near the optical axis, and the image side 32 of the third lens L3 is convex near the optical axis; the object side 41 of the fourth lens L4 is convex near the optical axis, and the image side 42 of the fourth lens L4 is convex near the optical axis; the object side 51 of the fifth lens L5 is convex near the optical axis, and the image side 52 of the fifth lens L5 is convex near the optical axis; the object side 61 of the sixth lens L6 is concave near the optical axis, and the image side 62 of the sixth lens L6 is concave near the optical axis; the object side 71 of the seventh lens L7 is convex near the optical axis, and the image side 72 of the seventh lens L7 is concave near the optical axis.

[0128] Specifically, taking the focal length F=7.37mm of the optical lens 100, the aperture number FNO=1.6 of the optical lens 100, and the maximum field of view FOV=130deg of the optical lens 100 as an example, other parameters of the optical lens 100 are given in the following Table 1. Among them, the elements along the optical axis of the optical lens 100 from the object side to the image side are arranged in the order of the elements from top to bottom in Table 1. In the same lens, the surface with a smaller surface number is the object side surface of the lens, and the surface with a larger surface number is the image side surface of the lens, such as surface numbers 1 and 2 correspond to the object side surface 11 and the image side surface 12 of the first lens L1, respectively. The Y radius in Table 1 is the radius of curvature of the object side surface or the 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 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 next surface vertex. If the thickness of the aperture 102 is a positive value, the aperture 102 is on the object side of the next surface vertex. It can be understood that the units of the Y radius, thickness, and focal length in Table 1 are all mm. And the refractive index, Abbe number, focal length, etc. in Table 1 are all obtained at a reference wavelength of 587.5618nm.

[0129] Table 1

[0130]

[0131]

[0132] In Example 1, the object-side surface and the image-side surface of the first lens L1, the third lens L3, and the seventh lens L7 are all aspherical surfaces, and the surface shape x of each aspherical lens can be defined by but not limited to the following aspherical surface formula:

[0133]

[0134] 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 surfaces of the first lens L1, the third lens L3, and the seventh lens L7.

[0135] Table 2

[0136]

[0137] 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 661nm, 614nm, 558nm, 502nm, and 455nm. 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.

[0138] Figure 2 (B) is the astigmatism diagram of the optical lens 100 in Example 1 at a wavelength of 558 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 image height, in mm. 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.

[0139] Figure 2 (C) is a distortion diagram of the optical lens 100 in Example 1 at a wavelength of 558 nm. The horizontal axis along the X-axis direction represents the distortion, and the vertical axis along the Y-axis direction represents the image height, in units of mm. 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.

[0140] Example 2

[0141] Figure 3Schematic diagram of the structure of the optical lens 100 disclosed in Example 2 of the present application, wherein the object side surface 11 of the first lens L1 is convex at the near optical axis, and the image side surface 12 of the first lens L1 is concave at the near optical axis; the object side surface 21 of the second lens L2 is concave at the near optical axis, and the image side surface 22 of the second lens L2 is convex at the near optical axis; the object side surface 31 of the third lens L3 is convex at the near optical axis, and the image side surface 32 of the third lens L3 is convex at the near optical axis; the fourth lens L4 The object side surface 41 of the fourth lens L4 is concave at the near optical axis, and the image side surface 42 of the fourth lens L4 is convex at the near optical axis; the object side surface 51 of the fifth lens L5 is convex at the near optical axis, and the image side surface 52 of the fifth lens L5 is convex at the near optical axis; the object side surface 61 of the sixth lens L6 is concave at the near optical axis, and the image side surface 62 of the sixth lens L6 is concave at the near optical axis; the object side surface 71 of the seventh lens L7 is convex at the near optical axis, and the image side surface 72 of the seventh lens L7 is concave at the near optical axis.

[0142] Specifically, taking the focal length F of the optical lens 100 = 7.05 mm, the aperture number FNO of the optical lens 100 = 1.6, and the maximum field angle FOV of the optical lens 100 = 130 degrees as an example, other parameters of the optical lens 100 are given in the following Table 3. The definition of each parameter can be obtained from the description of the aforementioned embodiment, and will not be repeated here. The refractive index, Abbe number, focal length, etc. in Table 2 are all obtained at a reference wavelength of 587.5618 nm.

[0143] Table 3

[0144]

[0145] Table 4 gives the high-order coefficients of the aspheric surfaces of the first lens L1, the third lens L3 and the seventh lens L7 that can be used in Example 2, wherein the surface shape of each aspheric surface can be defined by the formula given in Example 1.

[0146] Table 4

[0147]

[0148]

[0149] See also Figure 4 , Figure 4 (A) is a spherical aberration diagram of the optical lens 100 at wavelengths of 661 nm, 614 nm, 558 nm, 502 nm, 455 nm, and 425 nm. Figure 4 (B) and (C) in FIG. 1 are respectively the astigmatism diagram and the distortion diagram of the optical lens 100 at a wavelength of 558 nm. Figure 4It can be seen from the (A) spherical aberration diagram, (B) astigmatism diagram, and (C) distortion diagram in the figure that the spherical aberration, astigmatism, and distortion of the optical lens 100 are all well controlled, so that the optical lens 100 of this embodiment has good imaging quality.

[0150] Example 3

[0151] Figure 5 The schematic diagram of the structure of the optical lens 100 disclosed in Example 3 of the present application, the optical lens 100 includes a first lens L1, a second lens L2, a third lens L3, a fourth lens L4, an aperture 102, a fifth lens L5, a sixth lens L6, a seventh lens L7, a filter 110 and a protective glass 120 arranged in sequence along the optical axis from the object side to the image side. Specifically, taking the focal length F=7.15mm of the optical lens 100, the aperture number FNO=1.6 of the optical lens 100, and the maximum field of view FOV=130deg of the optical lens 100 as an example, other parameters of the optical lens 100 are given in the following Table 5. And the definition of each parameter can be obtained from the description of the aforementioned embodiment, and will not be repeated here. And the refractive index, Abbe number, focal length, etc. in Table 2 are all obtained at a reference wavelength of 587.5618nm. In addition, for the corresponding relationship between the serial number of each surface of each lens and the object side and image side of each lens, please refer to the aforementioned Example 2, which will not be repeated here.

[0152] Table 5

[0153]

[0154]

[0155] Table 6 gives the high-order coefficients of the aspheric surfaces of the first lens L1, the third lens L3 and the seventh lens L7 that can be used in Example 3, wherein the surface shape of each aspheric surface can be defined by the formula given in Example 1.

[0156] Table 6

[0157]

[0158] See also Figure 6 , Figure 6 (A) is a spherical aberration diagram of the optical lens 100 at wavelengths of 661 nm, 614 nm, 558 nm, 502 nm, and 435 nm. Figure 6 (B) and (C) in FIG. 1 are respectively the astigmatism diagram and the distortion diagram of the optical lens 100 at a wavelength of 558 nm. Figure 6 It can be seen from the (A) spherical aberration diagram, (B) astigmatism diagram, and (C) distortion diagram in the figure that the spherical aberration, astigmatism, and distortion of the optical lens 100 are all well controlled, so that the optical lens 100 of this embodiment has good imaging quality.

[0159] Example 4

[0160] Figure 7 This is a schematic diagram of the structure of the optical lens 100 disclosed in Example 4 of the present application. Specifically, taking the focal length F=6.98mm of the optical lens 100, the aperture number FNO=1.6 of the optical lens 100, and the maximum field of view FOV=130deg of the optical lens 100 as an example, 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, focal length, etc. in Table 7 are all obtained at a reference wavelength of 587.5618nm. 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 2, which will not be repeated here.

[0161] Table 7

[0162]

[0163]

[0164] Table 8 gives the high-order coefficients of the aspheric surfaces of the first lens L1, the third lens L3 and the seventh lens L7 that can be used in Example 4, wherein the surface shape of each aspheric surface can be defined by the formula given in Example 1.

[0165] Table 8

[0166]

[0167] See also Figure 8 ,Depend on Figure 8 As can be seen from the spherical aberration diagram (A), astigmatism diagram (B), and distortion diagram (C), 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 2. Figure 4 (A) Figure 4 (B) Figure 4 The contents described in (C) will not be repeated here.

[0168] Example 5

[0169] 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 focal length F=6.72mm of the optical lens 100, the aperture number FNO=1.6 of the optical lens 100, and the maximum field of view FOV=130deg of the optical lens 100 as an example, 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, focal length, etc. in Table 9 are all obtained at a reference wavelength of 587.5618nm. 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 2, which will not be repeated here.

[0170] Table 9

[0171]

[0172] Table 10 gives the high-order coefficients of the aspheric surfaces of the first lens L1, the third lens L3 and the seventh lens L7 that can be used in Example 5, wherein the surface shape of each aspheric surface can be defined by the formula given in Example 1.

[0173] Table 10

[0174]

[0175]

[0176] See also Fig.10 , Fig.10 (A), (B), and (C) are respectively the spherical aberration diagram, astigmatism diagram, and distortion diagram of the optical lens 100 in Example 5. Fig.10 As can be seen from the spherical aberration diagram (A), astigmatism diagram (B), and distortion diagram (C), 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 2. Figure 4 (A) Figure 4 (B) Figure 4 The contents described in (C) will not be repeated here.

[0177] Example 6

[0178] Fig.11This is a schematic diagram of the structure of the optical lens 100 disclosed in Example 6 of the present application. Specifically, taking the focal length F=7.34mm of the optical lens 100, the aperture number FNO=1.7 of the optical lens 100, and the maximum field of view FOV=125deg of the optical lens 100 as an example, other parameters of the optical lens 100 are given in the following Table 11. 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, focal length, etc. in Table 11 are all obtained at a reference wavelength of 587.5618nm. 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.

[0179] Table 11

[0180]

[0181]

[0182] Table 12 gives the high-order coefficients of the aspheric surfaces of the first lens L1, the third lens L3 and the seventh lens L7 that can be used in Example 6, wherein the surface shape of each aspheric surface can be defined by the formula given in Example 1.

[0183] Table 12

[0184]

[0185] See also Fig.12 , Fig.12 (A) is a spherical aberration diagram of the optical lens 100 disclosed in Example 6 at wavelengths of 661 nm, 614 nm, 558 nm, 502 nm, 455 nm, and 435 nm. Fig.12 (B) and Fig.12 (C) in the figure are respectively the astigmatism diagram and the distortion diagram of the optical lens 100 at a wavelength of 558 nm.

[0186] Depend on Fig.12 It can be seen from the (A) spherical aberration diagram, (B) astigmatism diagram, and (C) distortion diagram in the figure that the spherical aberration, astigmatism, and distortion of the optical lens 100 are all well controlled, so that the optical lens 100 of this embodiment has good imaging quality.

[0187] Example 7

[0188] Fig.13This is a schematic diagram of the structure of the optical lens 100 disclosed in Example 7 of the present application. Specifically, taking the focal length F=7.59mm of the optical lens 100, the aperture number FNO=1.8 of the optical lens 100, and the maximum field of view FOV=135deg of the optical lens 100 as an example, other parameters of the optical lens 100 are given in the following Table 13. 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, focal length, etc. in Table 13 are all obtained at a reference wavelength of 587.5618nm. 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.

[0189] Table 13

[0190]

[0191]

[0192] Table 14 gives the high-order coefficients of the aspheric surfaces of the first lens L1, the third lens L3 and the seventh lens L7 that can be used in Example 7, wherein the surface shape of each aspheric surface can be defined by the formula given in Example 1.

[0193] Table 14

[0194]

[0195] See also Fig.14 ,Depend on Fig.14 As can be seen from the spherical aberration diagram (A), astigmatism diagram (B), and distortion diagram (C), 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.14 (A) Fig.14 (B) and Fig.14 The wavelengths corresponding to the curves in (C) can be referred to in Example 2. Figure 4 (A) Figure 4 (B) Figure 4 The contents described in (C) will not be repeated here.

[0196] Please refer to Table 15, which is a summary of the ratios of the various relationship equations in Examples 1 to 7 of the present application.

[0197] Table 15

[0198]

[0199]

[0200] See also Fig.15The 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 7, 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, high relative illumination and 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.

[0201] 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.16 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.

[0202] 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 large field of view, high relative illumination and miniaturization 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.

[0203] The optical lens, camera module and terminal device disclosed in the embodiments of the present application are introduced in detail above. Specific examples are used in this article to illustrate the principles and implementation methods of the present application. The description of the above embodiments is only used to help understand the optical lens, camera module and terminal device of the present application and its core idea; at the same time, for general technical personnel in this field, according to the ideas of the present application, there will be changes in the specific implementation methods and application scope. In summary, the content of this specification should not be understood as a limitation on the present application.

Claims

1. An optical lens, characterized in that: There are a total of seven lenses with refractive power, including a first lens, a second lens, a third lens, a fourth lens, a fifth lens, a sixth lens, and a seventh lens arranged in sequence from the object side to the image side along the optical axis; The first lens has negative refractive power. The object side surface of the first lens is convex near the optical axis, and the image side surface of the first lens is concave near the optical axis; The second lens has negative refractive power. The object side surface of the second lens is concave near the optical axis, and the image side surface of the second lens is convex near the optical axis; The third lens has positive refractive power. Both the object side surface and the image side surface of the third lens are convex near the optical axis; The fourth lens has positive refractive power. The image side surface of the fourth lens is convex near the optical axis; The fifth lens has positive refractive power. Both the object side surface and the image side surface of the fifth lens are convex near the optical axis; The sixth lens has negative refractive power. Both the object side surface and the image side surface of the sixth lens are concave near the optical axis; The seventh lens has positive refractive power. The object side surface of the seventh lens is convex near the optical axis, and the image side surface of the seventh lens is concave near the optical axis; The optical lens satisfies the following relational expressions: 1.6 ≤ FNO ≤ 1.8, 125deg ≤ FOV ≤ 135deg, and 5 < TTL / F < 6.5; Wherein, FOV is the maximum field of view angle of the optical lens, FNO is the f-number of the optical lens, TTL is the distance from the object side surface of the first lens to the imaging surface of the optical lens on the optical axis, and F is the focal length of the optical lens.

2. The optical lens according to claim 1, characterized in that: The optical lens satisfies the following relational expressions: 1.1 < F / IMGH < 1.3, and / or, 1.2 < IMGH / EPD < 1.4; Wherein, IMGH is half of the image height corresponding to the maximum field of view angle of the optical lens, and EPD is the entrance pupil diameter of the optical lens.

3. The optical lens according to claim 1, characterized in that: The optical lens satisfies the following relational expressions: 70deg < FOV / FNO < 85deg, and / or, 145 < FOV*F / IMGH < 180; Wherein, IMGH is half of the image height corresponding to the maximum field of view angle of the optical lens.

4. The optical lens according to claim 1, characterized in that: The optical lens satisfies the following relational expressions: 3 <CT MAX / CT MIN <7, and / or, 2.5<∑CT / ∑AT<4.5, and / or, -7 <F6 / CT6<-5; Among them, CT MAX is the maximum thickness of the first lens to the seventh lens on the optical axis, CT MIN is the minimum thickness of the first lens to the seventh lens on the optical axis, ∑CT is the sum of the thicknesses of all lenses from the first lens to the seventh lens on the optical axis, ∑AT is the sum of the air spaces between two adjacent lenses from the first lens to the seventh lens, F6 is the focal length of the sixth lens, and CT6 is the thickness of the sixth lens on the optical axis.

5. The optical lens according to claim 1, characterized in that: The optical lens satisfies the following relational expressions: 1.3 < SAG2 / SAG1 < 3.5, and / or, 3 < |SAG13 / SAG14| < 20, and / or, 1.1 < CT4 / ET4 < 1.4, and / or, 1.4 < CT7 / ET7 < 1.8; Wherein, SAG1 is the distance on the optical axis from the intersection of the object side surface of the first lens and the optical axis to the maximum effective aperture of the object side surface of the first lens, SAG2 is the distance on the optical axis from the intersection of the image side surface of the first lens and the optical axis to the maximum effective aperture of the image side surface of the first lens, SAG13 is the distance on the optical axis from the intersection of the object side surface of the seventh lens and the optical axis to the maximum effective aperture of the object side surface of the seventh lens, SAG14 is the distance on the optical axis from the intersection of the image side surface of the seventh lens and the optical axis to the maximum effective aperture of the image side surface of the seventh lens, CT4 is the thickness of the fourth lens on the optical axis, ET4 is the distance in the optical axis direction from the maximum effective aperture of the object side surface of the fourth lens to the maximum effective aperture of the image side surface of the fourth lens, CT7 is the thickness of the seventh lens on the optical axis, and ET7 is the distance in the optical axis direction from the maximum effective aperture of the object side surface of the seventh lens to the maximum effective aperture of the image side surface of the seventh lens.

6. The optical lens according to claim 1, characterized in that: The optical lens satisfies the following relational expressions: 1 < SD1 / SD14 < 1.32, and / or, 1 < SD1 / IMGH < 1.32, and / or, 0.85 < SD6 / CT3 < 1.5; Wherein, SD1 is half of the maximum effective aperture of the object side surface of the first lens, SD14 is half of the maximum effective aperture of the image side surface of the seventh lens, IMGH is half of the image height corresponding to the maximum field of view angle of the optical lens, SD6 is half of the maximum effective aperture of the image side surface of the third lens, and CT3 is the thickness of the third lens on the optical axis.

7. The optical lens according to claim 1, characterized in that: The optical lens satisfies the following relational expressions: 1.5 < F / BFL < 2, and / or, 1 < F5 / F < 2, and / or, 2 < F7 / F < 4; Wherein, BFL is the distance on the optical axis from the image side surface of the seventh lens to the imaging surface, F5 is the focal length of the fifth lens, and F7 is the focal length of the seventh lens.

8. The optical lens according to claim 1, characterized in that: The optical lens satisfies the following relational expressions: 1 < R1 / R2 < 3, and / or, -10 < (R5 - R6) / (R5 + R6) < 0, and / or, |(R7 - R8) / (R7 + R8)| < 3, and / or, 2 < R14 / R13 < 6; Wherein, R1 is the curvature radius of the object side surface of the first lens at the optical axis, R2 is the curvature radius of the image side surface of the first lens at the optical axis, R5 is the curvature radius of the object side surface of the third lens at the optical axis, R6 is the curvature radius of the image side surface of the third lens at the optical axis, R7 is the curvature radius of the object side surface of the fourth lens at the optical axis, R8 is the curvature radius of the image side surface of the fourth lens at the optical axis, R13 is the curvature radius of the object side surface of the seventh lens at the optical axis, and R14 is the curvature radius of the image side surface of the seventh lens at the optical axis.

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

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

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