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, 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 near an optical axis respectively; 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 thereof. 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 in a paraxial region. The seventh lens element with positive refractive power has a convex object-side surface and a concave image-side surface in paraxial regions, respectively. The optical lens satisfies the following relational expressions: 130 DEG < = FOV < = 150 DEG and 1.65 DEG < = FNO < = 1.75.

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 development of the automotive industry and the increasing demand for driving safety and assisted driving, traditional optical observation methods can no longer meet the needs. In complex traffic environments, drivers need clearer and broader fields of view to deal with potential dangers. At the same time, the emerging autonomous driving technology places extremely high demands on the vehicle's ability to perceive the surrounding environment. Based on this, vehicle-mounted lens technology came into being. Vehicle-mounted lenses can accurately capture image information around the vehicle, whether it is close-up road details or long-distance obstacles, which can be clearly presented, providing key support for driving safety and the effective operation of autonomous driving systems.

[0003] However, traditional automotive lenses have limitations in field of view and clarity, and cannot meet the requirements of large-scale scene monitoring in current complex traffic environments. In addition, a small field of view may lead to monitoring blind spots, posing a potential threat to driving safety. Therefore, the market currently needs a high-definition optical lens with a large field of view to meet automotive applications. 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, 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;

[0009] 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;

[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, and the object side surface and the image side surface of the seventh lens are both convex surfaces near the optical axis;

[0013] The optical lens satisfies the following relationship:

[0014] 130°≤FOV≤150° and 1.65≤FNO≤1.75;

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

[0016] In the optical lens provided by the present application, the first lens has a negative refractive power, the object side is a convex surface, the image side is a concave surface, and the convex surface is facing the meniscus shape of the object side, which can effectively collect incident light with a large field angle and increase the field angle of the fixed focus lens. The second lens has a negative refractive power, and the object side is a concave surface, which can preliminarily correct the astigmatism of the optical lens, and effectively control the trend of light to achieve a larger aperture. The third lens has a positive refractive power, and the object side is a convex surface, and the image side can be a concave surface, which can make the light smoothly transition to the image side of the optical lens. The fourth lens has a positive refractive power, the object side is a convex surface, and the image side is a convex surface, which is conducive to lowering the incident angle of the light after the light passes through the aperture, so that more light enters the optical lens on the image side, and improves the illumination of the optical lens. The fifth lens has a positive refractive power, and the object side and the image side are both convex at the near optical axis, which is conducive to reducing the chromatic aberration of the optical lens. At the same time, the fifth lens has a positive refractive power and is also conducive to converging light and reducing the total length of the optical lens. The sixth lens has negative refractive power, and both the object side and the image side 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 help to reduce the angle of light deflection and reduce the sensitivity of the optical lens. The seventh lens has positive refractive power, and both the object side and the image side are convex near the optical axis, which can converge light, reduce the total optical length, and further realize the miniaturization design of the optical lens.

[0017] The optical lens satisfies the relationship 130°≤FOV≤150°. 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.

[0018] The optical lens satisfies the relationship 1.65≤FNO≤1.75. By constraining the aperture number of the optical lens, the large aperture required by the optical lens can be met, the amount of light entering can be increased, and the illumination of the optical lens is high, so that it has good imaging quality in darker environments such as at night or on rainy days, meeting the requirements of large aperture and high resolution.

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

[0020] 7.0≤TTL / IMGH≤7.4, and / or, 0.18≤SD1 / TTL≤0.23, and / or, 8.6≤TTL / (CT5+CT6)≤9.3;

[0021] Among them, 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), IMGH is half of the image height corresponding to the maximum field of view angle of the optical lens, SD1 is the maximum effective semi-aperture of the object side of the first lens, CT5 is the thickness of the fifth lens on the optical axis, and CT6 is the thickness of the sixth lens on the optical axis.

[0022] The optical lens satisfies the relationship 7.0≤TTL / IMGH≤7.4. Under a certain optical lens image height, by controlling the ratio of the optical lens image height to the total optical length, the optical lens has a smaller total length to achieve miniaturization.

[0023] The optical lens satisfies the relationship 0.18≤SD1 / TTL≤0.23. Under a certain total length of the optical lens, by controlling the ratio of the maximum effective semi-aperture of the object side of the first lens to the total optical length, the head size and volume of the optical lens can be effectively limited to achieve miniaturization.

[0024] The optical lens satisfies the relationship 8.6≤TTL / (CT5+CT6)≤9.3. Increasing the thickness of the combined lens composed of the fifth lens and the sixth lens on the optical axis within a certain range is beneficial to enhancing its light control ability and controlling more light to enter the seventh lens, which can help improve the relative illumination.

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

[0026] 7.0≤R1 / F≤17, and / or, -1.9≤F1 / F≤-1.5, and / or, 6≤R1 / R2≤15;

[0027] 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, F1 is the focal length of the first lens, and F is the focal length of the optical lens.

[0028] The optical lens satisfies the relationship 7.0≤R1 / F≤17, and the curvature radius of the object side of the first lens at the optical axis is reasonably designed. On the one hand, the first lens is moved away from the image plane, and the corresponding image height becomes larger under the same field of view, which is helpful to receive light at a larger angle and reduce distortion; on the other hand, the light passing through the first lens does not make a steep turn, which can reduce tolerance sensitivity.

[0029] The optical lens satisfies the relationship -1.9≤F1 / F≤-1.5. By reasonably configuring the focal length of the first lens, the incident angle range of the incident light entering the optical lens can be further expanded, which is beneficial to effectively expand the field of view of the optical lens.

[0030] The optical lens satisfies the relationship 6≤R1 / R2≤15. By reasonably matching the ratio of the curvature radii of the object side and the image side of the first lens at the optical axis, the surface difference of the first lens is reasonably set, which is beneficial to controlling the shape of the first lens, correcting the aberration generated by itself, and improving the imaging quality.

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

[0032] 2.0≤CT1 / SAGS1≤7.5, and / or, -5.3≤CT2 / SAGS3≤-3.7, and / or, 0.2≤CT6 / SAGS10≤0.3;

[0033] Among them, CT1 is the thickness of the first lens on the optical axis, SAGS1 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, CT2 is the thickness of the second lens on the optical axis, SAGS3 is the distance from the intersection of the object side surface of the second lens and the optical axis to the maximum effective aperture of the object side surface of the second lens on the optical axis, CT6 is the thickness of the sixth lens on the optical axis, and SAGS10 is the distance from the intersection of the image side surface of the fifth lens and the optical axis to the maximum effective aperture of the image side surface of the fifth lens on the optical axis.

[0034] The optical lens satisfies the relationship 2.0≤CT1 / SAGS1≤7.5. By reasonably controlling the curvature of the object side of the first lens, the angle of light entering the optical lens is effectively controlled, thereby reducing the sensitivity of the optical lens.

[0035] The optical lens satisfies the relationship -5.3≤CT2 / SAGS3≤-3.7. By reasonably controlling the curvature of the object side of the second lens, the angle of light entering the optical lens is effectively controlled, thereby reducing the sensitivity of the optical lens.

[0036] The optical lens satisfies the relationship 0.2≤CT6 / SAGS10≤0.3. By reasonably controlling the curvature of the image side of the fifth lens, light can be better gathered and the imaging quality can be improved.

[0037] As an optional implementation manner, in an embodiment of the first aspect of the present application, the optical lens satisfies the following relationship:

[0038] 1.0≤SD6 / SD7≤1.1, and / or, 0.5≤CT3 / CT34≤2.6, and / or, 1.6≤(CT1+CT2) / CT12≤2.3;

[0039] Among them, CT1 is the thickness of the first lens on the optical axis, CT12 is the distance between the image side surface of the first lens and the object side surface of the second lens on the optical axis, CT2 is the thickness of the second lens on the optical axis, CT3 is the thickness of the third lens on the optical axis, CT34 is the distance between the image side surface of the third lens and the object side surface of the fourth lens on the optical axis, SD6 is the maximum effective semi-diameter of the image side surface of the third lens, and SD7 is the maximum effective semi-diameter of the object side surface of the fourth lens.

[0040] The optical lens satisfies the relationship 1.0≤SD6 / SD7≤1.1, so that the fourth lens has a small aperture characteristic and can effectively converge the light of the third lens, so that the light can better enter the imaging surface of the optical lens.

[0041] The optical lens satisfies the relationship 0.5≤CT3 / CT34≤2.6. 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.

[0042] The optical lens satisfies the relationship 1.6≤(CT1+CT2) / CT12≤2.3. By reasonably controlling the ratio of the sum of the thicknesses of the first lens and the second lens on the optical axis to the distance between the first lens and the second lens on the optical axis, it is beneficial to shorten the total length of the optical lens and make the structure of the optical lens more compact.

[0043] As an optional implementation manner, in an embodiment of the first aspect of the present application, the image side surface of the fifth lens is glued to the object side surface of the sixth lens, and the optical lens satisfies the following relationship:

[0044] 11≤F56 / F≤26, and / or, 0.4mm -1 ≤(Vd5-Vd6) / F56≤0.7mm -1 , and / or, 2.2≤CT5 / CT6≤3.3;

[0045] Wherein, F is the focal length of the optical lens, F56 is the focal length of the combined lens formed by the fifth lens and the sixth lens, CT5 is the thickness of the fifth lens on the optical axis, CT6 is the thickness of the sixth lens on the optical axis, Vd5 is the Abbe number of the fifth lens, and Vd6 is the Abbe number of the sixth lens.

[0046] The optical lens satisfies the relationship 11≤F56 / F≤26. By reasonably matching the focal length of the cemented lens composed of the fifth lens and the sixth lens, it is beneficial to correct chromatic aberration and balance various aberrations, improve resolution, and effectively reduce tolerance sensitivity, thereby improving the imaging quality of the optical lens.

[0047] The optical lens satisfies the relationship 0.4mm -1 ≤(Vd5-Vd6) / F56≤0.7mm -1 By reasonably setting the ratio of the difference in Abbe numbers between the fifth lens and the sixth lens to the combined focal length of the fifth lens and the sixth 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.

[0048] The optical lens satisfies the relationship 2.2≤CT5 / CT6≤3.3. By reasonably controlling the thickness ratio of the fifth lens and the sixth lens on the optical axis, it is beneficial to make light pass through the cemented lens smoothly and reduce aberration.

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

[0050] -3.6≤R14 / R13≤-3.2, and / or, 1.1≤CT7 / ET7≤1.4, and / or, 5.5≤F7 / CT7≤8.1;

[0051] Among them, R13 is the curvature radius of the object side surface of the seventh lens at the optical axis, R14 is the curvature radius of the image side surface of the seventh lens at the optical axis, CT7 is the thickness of the seventh lens on the optical axis, ET7 is the distance from the maximum effective aperture of the object side surface of the seventh lens to the maximum effective aperture of the image side surface of the seventh lens in the optical axis direction, and F7 is the focal length of the seventh lens.

[0052] The optical lens satisfies the relationship -3.6≤R14 / R13≤-3.2. By reasonably matching the ratio of the curvature radii of the object side surface and the image side surface of the seventh lens, the surface shape difference of the seventh lens is reasonably set, which is beneficial to controlling the shape of the seventh lens, correcting the aberration generated by itself, and improving the imaging quality.

[0053] The optical lens satisfies the relationship 1.1≤CT7 / ET7≤1.4, and the thickness ratio of the fourth lens can be reasonably controlled, thereby optimizing the surface shape of the fourth lens, which is beneficial to the effective convergence of large-angle incident light and makes the light passing through the fourth lens have a smaller deflection angle, thereby reducing the generation of stray light and ensuring good imaging performance.

[0054] The optical lens satisfies the relationship 5.5≤F7 / CT7≤8.1. By reasonably controlling the relationship between the focal length of the seventh lens and the thickness of the seventh lens, the focal length of the seventh lens will not be too large, which is convenient for correcting aberrations. The tolerance sensitivity of the seventh lens can be reduced, the difficulty of the processing technology is reduced, and it is beneficial to improve the assembly yield of the optical lens.

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

[0056] 17°≤IMGH*FOV / TTL≤22°, and / or, 0.85≤F / IMGH≤1.0, and / or, -10≤F123 / F≤-6;

[0057] Among them, TTL is the distance from the object side of the first lens to the imaging surface of the optical lens on the optical axis, IMGH is half of the image height corresponding to the maximum field of view angle of the optical lens, FOV is the maximum field of view angle of the optical lens, F is the focal length of the optical lens, and F123 is the focal length of the combined lens composed of the first lens, the second lens and the third lens.

[0058] The optical lens satisfies the relationship 17°≤IMGH*FOV / TTL≤22°. By limiting IMGH*FOV / TTL within a reasonable range, under the same field of view angle and the same image height, the length of the lens can be effectively limited, which is conducive to miniaturization of the lens.

[0059] The optical lens satisfies the relationship 0.85≤F / IMGH≤1.0. By rationally configuring the ratio of the focal length and the half image height of the optical lens, the optical lens can meet the high-definition imaging requirements and can also be used to achieve shooting within a larger field of view.

[0060] The optical lens satisfies the relationship -10≤F123 / F≤-6. By reasonably configuring the combined focal length of the combined lens composed of the first lens, the second lens and the third lens, it is beneficial to achieve a wide angle of the optical lens and correct the field curvature of the optical lens.

[0061] In a second aspect, the present application discloses a camera module, which includes an image sensor and any one of the above-mentioned optical lenses, wherein the image sensor is arranged on the image side of the optical lens.

[0062] In a third aspect, the present application discloses a terminal device, including a shell and the above-mentioned camera module, wherein the camera module is arranged in the shell.

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

[0064] In the optical lens provided by the present application, the first lens has a negative refractive power, the object side is a convex surface, the image side is a concave surface, and the convex surface is facing the meniscus shape of the object side, which can effectively collect incident light with a large field angle and increase the field angle of the fixed focus lens. The second lens has a negative refractive power, and the object side is a concave surface, which can preliminarily correct the astigmatism of the optical lens, and effectively control the trend of light to achieve a larger aperture. The third lens has a positive refractive power, and the object side is a convex surface, and the image side can be a concave surface, which can make the light smoothly transition to the image side of the optical lens. The fourth lens has a positive refractive power, the object side is a convex surface, and the image side is a convex surface, which is conducive to lowering the incident angle of the light after the light passes through the aperture, so that more light enters the optical lens on the image side, and improves the illumination of the optical lens. The fifth lens has a positive refractive power, and the object side and the image side are both convex at the near optical axis, which is conducive to reducing the chromatic aberration of the optical lens. At the same time, the fifth lens has a positive refractive power and is also conducive to converging light and reducing the total length of the optical lens. The sixth lens has negative refractive power, and both the object side and the image side 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 help to reduce the angle of light deflection and reduce the sensitivity of the optical lens. The seventh lens has positive refractive power, and both the object side and the image side are convex near the optical axis, which can converge light, reduce the total optical length, and further realize the miniaturization design of the optical lens.

[0065] The optical lens satisfies the relationship 130°≤FOV≤150°. 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.

[0066] The optical lens satisfies the relationship 1.65≤FNO≤1.75. By constraining the aperture number of the optical lens, the large aperture required by the optical lens can be met, the amount of light entering can be increased, and the illumination of the optical lens is high, so that it has good imaging quality in darker environments such as at night or on rainy days, meeting the requirements of large aperture and high resolution. BRIEF DESCRIPTION OF THE DRAWINGS

[0067] 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.

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

[0069] 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;

[0070] Figure 3 is a schematic structural diagram of the optical lens disclosed in Example 2 of the present application;

[0071] 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;

[0072] Figure 5 is a schematic diagram of the structure of the optical lens disclosed in Example 3 of the present application;

[0073] 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;

[0074] Figure 7 is a schematic structural diagram of the optical lens disclosed in Example 4 of the present application;

[0075] 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;

[0076] Fig. 9 is a schematic structural diagram of the optical lens disclosed in Example 5 of the present application;

[0077] 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;

[0078] Fig.11It is a structural schematic diagram of the camera module disclosed in this application;

[0079] Fig.12 It is a schematic diagram of the structure when the terminal device disclosed in the present application is a car. DETAILED DESCRIPTION

[0080] 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.

[0081] 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.

[0082] 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.

[0083] 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.

[0084] 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.

[0085] Although some optical lenses for automobile applications have been proposed in the related art, there are some inherent problems with the optical lenses in the related art. For example, the optical lenses in the prior art cannot simultaneously meet the requirements of high resolution and miniaturization; although the prior art can achieve a resolution of one million pixels, the lens aberrations such as chromatic aberration, astigmatism, and distortion are relatively serious; the prior art has weak light transmission and cannot adapt to the dark environment at night or on rainy days; the prior art cannot simultaneously meet the requirements of small front port diameter and miniaturization; the prior art cannot simultaneously meet the requirements of large aperture and high resolution.

[0086] The technical solution of the present application will be further described below in conjunction with embodiments and drawings.

[0087] 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. Among them, the first lens L1 has a negative refractive power, the second lens L2 has a negative refractive power, the third lens L3 has a positive refractive power, the fourth lens L4 has a positive refractive power, the fifth lens L5 has a positive refractive power, the sixth lens L6 has a negative refractive power, and the seventh lens L7 has a positive refractive power. When imaging, light enters the first lens L1, the second lens L2, the third lens L3, the fourth lens L4, the fifth lens L5, the sixth lens L6, and the seventh lens L7 in sequence from the object side of the first lens L1, and is finally imaged on the imaging surface SI of the optical lens 100.

[0088] Further, the object-side surface S1 of the first lens L1 is convex at the near optical axis, and the image-side surface S2 of the first lens L1 is concave at the near optical axis; the object-side surface S3 of the second lens L2 is concave at the near optical axis, and the image-side surface S4 of the second lens L2 is convex at the near optical axis; the object-side surface S5 of the third lens L3 is convex at the near optical axis, and the image-side surface S6 of the third lens L3 is convex at the near optical axis; the object-side surface S7 of the fourth lens L4 is convex at the near optical axis, The image-side surface S8 of the fourth lens L4 is convex at the near optical axis; the object-side surface S9 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.

[0089] 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.

[0090] 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.

[0091] 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 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.

[0092] 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 SI 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 cut-off filter, so that light of other bands such as infrared light can be filtered out, and only visible light can be allowed to pass through, so that the imaging is more in line with the visual experience of the human eye. Of course, the filter 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 be imaged in dim environments and other special application scenarios and can obtain better imaging effects. 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.

[0093] 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.

[0094] In one embodiment, the optical lens 100 satisfies the relationship 130°≤FOV≤150°. By reasonably setting the maximum field of view of the optical lens 100, a sufficient field of view can be provided for the optical lens 100 to meet the large field of view requirement of the optical lens 100.

[0095] In one embodiment, the optical lens 100 satisfies the relationship 1.65≤FNO≤1.75. By constraining the aperture number of the optical lens 100, the large aperture required by the optical lens 100 can be met, the amount of light entering can be increased, and the illumination of the optical lens 100 is high, so that it has good imaging quality in darker environments such as at night or on rainy days, meeting the requirements of large aperture and high resolution.

[0096] In one embodiment, the optical lens 100 satisfies the relationship 76°≤FOV / FNO≤88°. By reasonably controlling the relationship between the field of view FOV and the aperture number FNO of the optical lens 100, a reasonable field of view angle 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, while allowing the aperture to vary 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.

[0097] In one embodiment, the optical lens 100 satisfies the relationship 7.0≤TTL / IMGH≤7.4, TTL is the total length of the optical lens 100, IMGH is half of the image height corresponding to the maximum field of view FOV of the optical lens 100, and under a certain image height of the optical lens 100, by controlling the ratio of the image height of the optical lens 100 to the total optical length, the optical lens 100 has a smaller total length to achieve miniaturization.

[0098] In one embodiment, the optical lens 100 satisfies the relationship 0.18≤SD1 / TTL≤0.23, 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 to achieve miniaturization.

[0099] In one embodiment, the optical lens 100 satisfies the relationship 8.6≤TTL / (CT5+CT6)≤9.3, 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. Satisfying the above relationship, increasing the thickness of the combined lens composed of the fifth lens L5 and the sixth lens L6 on the optical axis within a certain range is conducive to enhancing its light control ability, and is conducive to controlling more light to enter the rear system, thereby improving relative illumination.

[0100] In one embodiment, the optical lens 100 satisfies the relationship 7.0≤R1 / F≤17, where R1 is the radius of curvature of the object side of the first lens L1 at the optical axis. The radius of curvature of the object side of the first lens L1 at the optical axis is reasonably designed. On the one hand, the first lens L1 is moved away from the imaging surface SI, and the corresponding image height under the same field of view becomes larger, which helps to accept light at a larger angle and reduce distortion; on the other hand, the light passing through the first lens L1 does not make a steep turn, which can reduce tolerance sensitivity.

[0101] In one embodiment, the optical lens 100 satisfies the relationship -1.9≤F1 / F≤-1.5, where F1 is the focal length of the first lens L1. By reasonably configuring the effective focal length value of the first lens L1, the incident angle range of the incident light entering the fixed-focus lens can be further expanded, which is beneficial to effectively expand the field of view of the fixed-focus lens.

[0102] In one embodiment, the optical lens 100 satisfies the relationship 11≤F56 / F≤26, where F56 is the focal length of the combined lens formed by the fifth lens L5 and the sixth lens L6. By reasonably matching the focal length of the cemented lens formed by the fifth lens L5 and the sixth lens L6, it is beneficial to correct chromatic aberration and balance various aberrations, improve resolution, and effectively reduce tolerance sensitivity, thereby improving the imaging quality of the optical lens 100.

[0103] In one embodiment, the optical lens 100 further satisfies the relationship -18≤F2 / F≤-10, 4≤F3 / F≤6, 3.5≤F4 / F≤4.1, 1.6≤F5 / F≤2.1, -2≤F6 / F≤-1.5, wherein F is the focal length of the optical lens 100, 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, and F6 is the focal length of the sixth lens L6. By satisfying the above formulas, the optical power distribution can be uniform and reasonable, the aberration is easy to correct, and the image quality is good.

[0104] In one embodiment, the optical lens 100 satisfies the relationship 6≤R1 / R2≤15, where R2 is the radius of curvature of the image side surface S2 of the first lens L1 at the optical axis. By reasonably matching the ratio of the radii of curvature of the object side surface S1 and the image side surface S2 of the first lens L1 at the optical axis, the surface shape difference of each lens is reasonably set, which is beneficial to controlling the shape of the first lens L1, correcting the aberration generated by itself, and improving the imaging quality.

[0105] In one implementation, the optical lens 100 satisfies the relationship -3.6≤R14 / R13≤-3.2, R13 is the radius of curvature of the object-side surface S13 of the seventh lens L7 at the optical axis, and R14 is the radius of curvature of the image-side surface S12 of the seventh lens L7 at the optical axis. By reasonably matching the ratio of the radii of curvature of the object-side surface S13 and the image-side surface S14 of the seventh lens L7 at the optical axis, the surface shape difference of the seventh lens L7 is reasonably set, which is beneficial to controlling the shape of the seventh lens L7, correcting the aberration generated by itself, and improving the imaging quality.

[0106] In one embodiment, the optical lens 100 satisfies the relationship 0.6≤R3 / R4≤0.7, 0.1≤R5 / R6≤0.3, -0.4≤R7 / R8≤-0.3, -0.95≤R9 / R10≤-0.9, -0.5≤R11 / R12≤-0.35, wherein R3 is the curvature radius of the object side surface S3 of the second lens L2 at the optical axis, R4 is the curvature radius of the image side surface S4 of the second lens L2 at the optical axis, and R5 is the curvature radius of the object side surface S5 of the third lens L3 at the optical axis. R6 is the curvature radius of the image-side surface S6 of the third lens L3 at the optical axis, R7 is the curvature radius of the object-side surface S7 of the fourth lens L4 at the optical axis, R8 is the curvature radius of the image-side surface S8 of the fourth lens L4 at the optical axis, R9 is the curvature radius of the object-side surface S9 of the fifth lens L5 at the optical axis, R10 is the curvature radius of the image-side surface S10 of the fifth lens L5 at the optical axis, R11 is the curvature radius of the object-side surface S11 of the sixth lens L6 at the optical axis, and R12 is the curvature radius of the image-side surface S12 of the sixth lens L6 at the optical axis.

[0107] By reasonably matching the ratio of the curvature radii of the object side and the image side of each lens at the optical axis, the surface shape differences of each lens can be reasonably set, which is beneficial to controlling the shape of each lens, correcting the aberrations generated by itself, and improving the imaging quality.

[0108] In one embodiment, the optical lens 100 satisfies the relationship 2.0≤CT1 / SAGS1≤7.5, CT1 is the thickness of the first lens L1 on the optical axis, 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, and by reasonably controlling the curvature of the object-side surface S1 of the first lens L1, the angle of the light entering the optical lens 100 is effectively controlled, thereby reducing the sensitivity of the optical lens 100.

[0109] In one embodiment, the optical lens 100 satisfies the relationship -5.3≤CT2 / SAGS3≤-3.7, CT2 is the thickness of the second lens L2 on the optical axis, SAGS3 is the distance from the intersection of the object side surface S3 of the second lens L2 and the optical axis to the maximum effective aperture of the object side surface S3 of the second lens L2 on the optical axis, and by reasonably controlling the curvature of the object side surface S3 of the second lens L2, the angle of the light entering the optical lens 100 is effectively controlled, thereby reducing the sensitivity of the optical lens 100.

[0110] In one embodiment, the optical lens 100 satisfies the relationship 0.2≤CT6 / SAGS10≤0.3, CT6 is the thickness of the sixth lens L6 on the optical axis, SAGS10 is the distance from the intersection of the image side surface S10 of the fifth lens L5 and the optical axis to the maximum effective aperture of the image side surface S10 of the fifth lens L5 on the optical axis, and by reasonably controlling the curvature of the image side surface S10 of the fifth lens L5, light can be better gathered and the imaging quality can be improved.

[0111] In one embodiment, the optical lens 100 satisfies the relationship 1.0≤SD6 / SD7≤1.1, SD6 is the maximum effective semi-aperture of the image-side surface S6 of the third lens L3, and SD7 is the maximum effective semi-aperture of the object-side surface S7 of the fourth lens L4, so that the fourth lens L4 has a small aperture characteristic, and can effectively converge the light of the third lens L3, so that the light can better enter the imaging surface SI of the optical lens 100.

[0112] In one embodiment, the optical lens 100 satisfies the relationship 0.5≤CT3 / CT34≤2.6, 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.

[0113] In one embodiment, the optical lens 100 satisfies the relationship 1.6≤(CT1+CT2) / CT12≤2.3, CT1 is the thickness of the first lens L1 on the optical axis, CT12 is the distance between the image side surface S2 of the first lens L1 and the object side surface S3 of the second lens L2 on the optical axis, and CT2 is the thickness of the second lens L2 on the optical axis. By reasonably controlling the ratio of the sum of the thicknesses of the first lens L1 and the second lens L2 on the optical axis to the distance between the first lens L1 and the second lens L2 on the optical axis, the overall length of the optical lens 100 is shortened, and the structure of the optical lens 100 is made more compact.

[0114] In one embodiment, the optical lens 100 satisfies the relationship 0.4 mm -1 ≤(Vd5-Vd6) / F56≤0.7mm -1 , Vd5 is the Abbe number of the fifth lens L5, Vd6 is the Abbe number of the sixth lens L6, and by reasonably setting the ratio of the difference in the Abbe numbers of the fifth lens L5 and the sixth lens L6 to the combined effective focal length of the fifth lens L5 and the sixth lens L6, the chromatic aberration of the optical lens 100 can be effectively corrected, the authenticity of the color can be restored, and the imaging quality can be improved.

[0115] In one embodiment, the optical lens 100 satisfies the relationship 2.2≤CT5 / CT6≤3.3. By properly controlling the thickness ratio of the fifth lens L5 and the sixth lens L6 on the optical axis, it is beneficial to make light pass through the cemented lens smoothly and reduce aberrations.

[0116] In one embodiment, the optical lens 100 satisfies the relationship 2≤CT5 / ET5≤4, where ET5 is the distance from the maximum effective aperture of the object side surface S9 of the fifth lens L5 to the maximum effective aperture of the image side surface S10 of the fifth lens L5 in the optical axis direction. Satisfying the above relationship is conducive to the manufacture of the optical lens 100, and can reduce the angle between the main light and the optical axis when it is incident on the imaging surface SI, thereby improving the relative illumination of the imaging surface SI.

[0117] In one embodiment, the optical lens 100 satisfies the relationship 0.4≤CT6 / ET6≤0.52, where 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 satisfying this relationship, the temperature drift of the optical lens 100 during imaging can be balanced.

[0118] In one implementation, the optical lens 100 satisfies the relationship 1.1≤CT7 / ET7≤1.4, CT7 is the thickness of the seventh lens L7 on the optical axis, and ET7 is the distance from the maximum effective aperture of the object-side surface S13 of the seventh lens L7 to the maximum effective aperture of the image-side surface S14 of the seventh lens L7 in the optical axis direction. The thickness ratio of the seventh lens L7 can be reasonably controlled, thereby optimizing the surface shape of the seventh lens L7, facilitating effective convergence of large-angle incident light, and making the light passing through the seventh lens L7 have a smaller deflection angle, thereby reducing the generation of stray light, thereby ensuring good imaging performance.

[0119] In one implementation, the optical lens 100 satisfies the relationship 5.5≤F7 / CT7≤8.1, where F7 is the focal length of the seventh lens L7. 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.

[0120] In one embodiment, the optical lens 100 satisfies the relationship 17°≤IMGH*FOV / TTL≤22°. By limiting IMGH*FOV / TTL within a reasonable range, under the same field of view angle and the same image height, the length of the optical lens 100 can be effectively limited, which is conducive to the miniaturization of the optical lens 100.

[0121] In one embodiment, the optical lens 100 satisfies the relationship 0.85≤F / IMGH≤1.0. By reasonably configuring the ratio of the focal length and the half image height of the optical lens 100, the optical lens 100 can meet the high-definition imaging requirements and can also enable the optical lens 100 to shoot within a larger field of view.

[0122] In one embodiment, the optical lens 100 satisfies the relationship -10≤F123 / F≤-6, where F123 is the focal length of the combined lens composed of the first lens L1, the second lens L2 and the third lens L3. By reasonably configuring the combined focal length of the combined lens composed of the first lens L1, the second lens L2 and the third lens L3, it is beneficial to achieve a wide angle of the optical lens 100 and correct the field curvature of the optical lens 100.

[0123] In one embodiment, the optical lens 100 satisfies the relationship 7.3≤TTL / F≤8.4, which can reasonably control the total length of the optical lens 100 and the focal length of the optical lens 100, 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 miniaturizing the optical lens 100, improving the resolution, and reducing the sensitivity of the lens.

[0124] In one embodiment, the optical lens 100 satisfies the relationship 1.3≤SD1 / IMGH≤1.6, where SD1 is the maximum effective semi-aperture of the image side surface S2 of the first lens L1. Satisfying the above relationship and reasonably controlling the maximum effective aperture of the object side surface S1 of the first lens L1 is conducive to realizing a miniaturized design of the optical lens 100.

[0125] In one embodiment, the optical lens 100 satisfies the relationship 1.35≤SD1 / SD14≤1.7, where SD14 is the maximum effective semi-aperture of the image side surface S14 of the seventh lens L7, which is beneficial for controlling the overall size of the optical lens 100 and ensuring good imaging effects while maintaining miniaturization.

[0126] Example 1

[0127] Figure 1 Schematic diagram of the structure of the optical lens 100 disclosed in Example 1 of the present application, the optical lens 100 includes 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 ...8 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.

[0128] Specifically, taking the focal length F=4.18mm of the optical lens 100, the aperture number FNO=1.68 of the optical lens 100, and the maximum field of view FOV=140° of the optical lens 100 as an example, other parameters of the optical lens 100 are given in the following Table 1. Among them, the elements along the optical axis of the optical lens 100 from the object side to the image side are arranged in the order of the elements from top to bottom in Table 1. In the same lens, the surface with a smaller surface number is the object side surface of the lens, and the surface with a larger surface number is the image side surface of the lens, such as surface numbers 1 and 2 correspond to the object side surface S1 and image side surface S2 of the first lens L1, respectively. The Y radius in Table 1 is the radius of curvature of the object side surface or image side surface of the corresponding surface number at the optical axis. The first value in the "thickness" parameter column of the lens is the thickness of the lens on the optical axis, and the second value is the distance from the image side surface of the lens to the next surface on the optical axis. The value of the aperture 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, etc. in Table 1 are all obtained at a reference wavelength of 587.5618nm, and the focal length is obtained at a reference wavelength of 546nm.

[0129] Table 1

[0130]

[0131] 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:

[0132]

[0133] 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, A16, A18, and A20 of the aspheric surfaces of the first lens L1, the third lens L3, and the seventh lens L7.

[0134] Table 2

[0135]

[0136] Figure 2It is the spherical aberration diagram (mm), astigmatism diagram (mm) and distortion diagram (%) of the optical lens 100 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.

[0137] 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 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.

[0138] 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 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.

[0139] Example 2

[0140] 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 focal length F=4.47mm of the optical lens 100, the aperture number FNO=1.70 of the optical lens 100, and the maximum field of view FOV=130° of the optical lens 100 as an example, 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 2 are all obtained at a reference wavelength of 587.5618nm, 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.

[0141] Table 3

[0142]

[0143]

[0144] 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.

[0145] Table 4

[0146]

[0147] 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.

[0148] Example 3

[0149] 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 focal length F=3.87mm of the optical lens 100, the aperture number FNO=1.70 of the optical lens 100, and the maximum field of view FOV=140° of the optical lens 100 as an example, 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 2 are all obtained at a reference wavelength of 587.5618nm, 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.

[0150] Table 5

[0151]

[0152]

[0153] Table 6 gives the high-order coefficients of each aspherical mirror surface of the seventh lens L7 that can be used in Example 3, wherein the surface shape of each aspherical surface can be defined by the formula given in Example 1.

[0154] Table 6

[0155]

[0156] 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.

[0157] Example 4

[0158] 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=3.98mm of the optical lens 100, the aperture number FNO=1.71 of the optical lens 100, and the maximum field of view FOV=150° 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, etc. in Table 7 are all obtained at a reference wavelength of 587.5618nm, 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.

[0159] Table 7

[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 8It 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. 9 This 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=3.88mm of the optical lens 100, the aperture number FNO=1.73 of the optical lens 100, and the maximum field of view FOV=146° 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, etc. in Table 9 are all obtained at a reference wavelength of 587.5618nm, 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.

[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] 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. 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.

[0173] Please refer to Table 11, which is a summary of the ratios of the various relationship equations in Examples 1 to 5 of the present application.

[0174] Table 11

[0175] Relationship / Example Example 1 Example 2 Example 3 Example 4 Example 5 FOV 140° 130° 140° 150° 146° FNO 1.680 1.699 1.698 1.708 1.727 TTL / IMGH 7.1002 7.3012 7.0898 7.0537 7.3542 SD1 / TTL 0.1969 0.1816 0.2228 0.2190 0.2063 TTL / (CT5+CT6) 9.0180 8.7552 9.2788 9.1042 8.6528 R1 / F 16.0190 12.1241 7.4961 14.3316 16.5325 F1 / F -1.5954 -1.6101 -1.8032 -1.6496 -1.6774 R1 / R2 14.4566 11.4507 6.6579 12.6299 14.1376 CT1 / SAGS1 7.4009 5.6795 2.0418 4.0470 4.3335 CT2 / SAGS3 -5.2653 -3.7992 -4.9307 -4.8848 -4.8401 CT6 / SAGS10 0.2777 0.2997 0.2198 0.2412 0.2875 SD6 / SD7 1.0534 1.0884 1.0436 1.0474 1.0422 CT3 / CT34 1.9725 2.3604 0.5786 2.5313 1.8072 (CT1+CT2) / CT12 2.2609 1.7566 1.6313 2.0586 1.7943 F56 / F 14.9935 11.9948 25.4068 18.9983 17.4754 (Vd5-Vd6) / F56 <![CDATA[0.6325mm -1 ]]> <![CDATA[0.6838mm -1 ]]> <![CDATA[0.4026mm -1 ]]> <![CDATA[0.5225mm -1 ]]> <![CDATA[0.6132mm -1 ]]> CT5 / CT6 2.3531 2.4943 3.2971 2.7317 2.2524 R14 / R13 -3.2880 -3.4944 -3.2360 -3.2845 -3.5292 CT7 / ET7 1.1974 1.1695 1.3400 1.2530 1.2979 F7 / CT7 6.3488 8.0352 7.3011 6.0776 5.8321 IMGH*FOV / TTL 19.7177° 17.8053° 19.7467° 21.2656° 19.8526° F / IMGH 0.8982 0.9885 0.8649 0.8578 0.8853 F123 / F -7.9766 -6.7615 -8.3884 -9.5315 -8.3945 TTL / F 7.9053 7.3865 8.1975 8.2230 8.3071 FOV / FNO 83.3333 76.5360 82.4469 87.8450 84.5396 SD1 / IMGH 1.3978 1.3256 1.5797 1.5448 1.5174 SD1 / SD14 1.5854 1.3980 1.6909 1.6173 1.5189 F2 / F -12.1406 -14.6611 -17.5128 -12.9993 -11.7242 F3 / F 4.5259 4.5888 5.7238 4.6597 4.8601 F4 / F 3.8461 3.5414 3.8787 3.9903 4.0843 F5 / F 1.8424 1.6933 2.0674 1.9489 2.0104 F6 / F -1.8202 -1.6873 -1.9629 -1.8799 -1.9690 F7 / F 4.2163 5.7341 4.3047 4.1621 4.0521 R3 / R4 0.6277 0.6342 0.6695 0.6308 0.6304 R5 / R6 0.1042 0.2843 0.2740 0.1432 0.1237 R7 / R8 -0.3390 -0.3487 -0.3503 -0.3128 -0.3192 R9 / R10 -0.9499 -0.9044 -0.9324 -0.9429 -0.9493 R11 / R12 -0.4034 -0.4274 -0.4810 -0.4429 -0.3812 CT5 / ET5 3.5093 2.3950 2.1427 3.5732 3.8999 CT6 / ET6 0.4791 0.5158 0.4378 0.4340 0.4828

[0176] See also Fig.11 The present application also discloses a camera module 200, which includes an image sensor 201 and an optical lens 100 as described in any one of the 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, 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.

[0177] 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.

[0178] 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.

[0179] 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, and the object side surface and the image side surface of the sixth lens are both concave surfaces near the optical axis; The seventh lens has positive refractive power, and the object side surface and the image side surface of the seventh lens are both convex surfaces near the optical axis; The optical lens satisfies the following relationship: 130°≤FOV≤150° and 1.65≤FNO≤1.75; 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: 7.0≤TTL / IMGH≤7.4, and / or, 0.18≤SD1 / TTL≤0.23, and / or, 8.6≤TTL / (CT5+CT6)≤9.3; Among them, TTL is the distance from the object side of the first lens to the imaging surface of the optical lens on the optical axis, IMGH is half of the image height corresponding to the maximum field of view angle of the optical lens, SD1 is the maximum effective semi-aperture of the object side of the first lens, CT5 is the thickness of the fifth lens on the optical axis, and CT6 is the thickness of the sixth lens on the optical axis.

3. The optical lens according to claim 1, characterized in that: The optical lens satisfies the following relationship: 7.0≤R1 / F≤17, and / or, -1.9≤F1 / F≤-1.5, and / or, 6≤R1 / R2≤15; 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, F1 is the focal length of the first lens, and F is the focal length of the optical lens.

4. The optical lens according to claim 1, characterized in that: The optical lens satisfies the following relationship: 2.0≤CT1 / SAGS1≤7.5, and / or, -5.3≤CT2 / SAGS3≤-3.7, and / or, 0.2≤CT6 / SAGS10≤0.3; Among them, CT1 is the thickness of the first lens on the optical axis, SAGS1 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, CT2 is the thickness of the second lens on the optical axis, SAGS3 is the distance from the intersection of the object side surface of the second lens and the optical axis to the maximum effective aperture of the object side surface of the second lens on the optical axis, CT6 is the thickness of the sixth lens on the optical axis, and SAGS10 is the distance from the intersection of the image side surface of the fifth lens and the optical axis to the maximum effective aperture of the image side surface of the fifth lens on the optical axis.

5. The optical lens according to claim 1, characterized in that: The optical lens satisfies the following relationship: 1.0≤SD6 / SD7≤1.1, and / or, 0.5≤CT3 / CT34≤2.6, and / or, 1.6≤(CT1+CT2) / CT12≤2.3; Among them, CT1 is the thickness of the first lens on the optical axis, CT12 is the distance between the image side surface of the first lens and the object side surface of the second lens on the optical axis, CT2 is the thickness of the second lens on the optical axis, CT3 is the thickness of the third lens on the optical axis, CT34 is the distance between the image side surface of the third lens and the object side surface of the fourth lens on the optical axis, SD6 is the maximum effective semi-diameter of the image side surface of the third lens, and SD7 is the maximum effective semi-diameter of the object side surface of the fourth lens.

6. The optical lens according to claim 1, characterized in that: The image side surface of the fifth lens is glued to the object side surface of the sixth lens, and the optical lens satisfies the following relationship: 11≤F56 / F≤26, and / or, 0.4mm -1 ≤(Vd5-Vd6) / F56≤0.7mm -1 , and / or, 2.2≤CT5 / CT6≤3.3; Wherein, F is the focal length of the optical lens, F56 is the combined focal length of the fifth lens and the sixth lens, CT5 is the thickness of the fifth lens on the optical axis, CT6 is the thickness of the sixth lens on the optical axis, Vd5 is the Abbe number of the fifth lens, and Vd6 is the Abbe number of the sixth lens.

7. The optical lens according to claim 1, characterized in that: The optical lens satisfies the following relationship: -3.6≤R14 / R13≤-3.2, and / or, 1.1≤CT7 / ET7≤1.4, and / or, 5.5≤F7 / CT7≤8.1; Among them, R13 is the curvature radius of the object side surface of the seventh lens at the optical axis, R14 is the curvature radius of the image side surface of the seventh lens at the optical axis, CT7 is the thickness of the seventh lens on the optical axis, ET7 is the distance from the maximum effective aperture of the object side surface of the seventh lens to the maximum effective aperture of the image side surface of the seventh lens in the optical axis direction, 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 relationship: 17°≤IMGH*FOV / TTL≤22°, and / or, 0.85≤F / IMGH≤1.0, and / or, -10≤F123 / F≤-6; Wherein, TTL is the distance from the object side of the first lens to the imaging surface of the optical lens on the optical axis, IMGH is half of the image height corresponding to the maximum field of view angle of the optical lens, F is the focal length of the optical lens, and F123 is the combined focal length of the first lens, the second lens and the third lens.

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

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

Images