Optical lens, image capturing module and terminal equipment

Abstract

The invention discloses an optical lens, an image capturing module and a terminal device, the optical lens comprises seven lenses with refractive power, the first lens has negative refractive power, the object side surface is a convex surface, and the image side surface is a concave surface; the second lens element with negative refractive power has a concave object-side surface and a convex image-side surface. The third lens element with positive refractive power has a convex object-side surface and a concave image-side surface, respectively. The fourth lens element with positive refractive power has a convex object-side surface and a convex image-side surface. The fifth lens element with refractive power has a convex object-side surface and a convex image-side surface. The sixth lens has negative refractive power, the object side surface and the image side surface are both concave surfaces, the seventh lens has positive refractive power, and the object side surface and the image side surface are respectively a convex surface and a concave surface; the optical lens satisfies the following relational expressions: FOV is greater than or equal to 130 deg and less than or equal to 140 deg, and TTL / IMGH is greater than or equal to 7.1 and less than or equal to 7.9. According to the optical lens, the image capturing module and the terminal equipment, the miniaturization design of the optical lens can be met, meanwhile, the large field angle can be achieved, and meanwhile the imaging quality can be improved.

Description

Technical Field

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

[0002] With the development of the automotive industry, the country's requirements for road traffic safety and automobile safety are constantly increasing, and the application of ADAS (Advanced Driving Assistance System), DMS (Driver Monitor System), and CMS (Camera Monitor System) in vehicle driving is gradually being promoted. The vehicle lens is a key component for the automatic driving assistance system to obtain external information. With the rapid development of the automatic driving assistance system, the performance requirements for the front-view optical lens are becoming higher and higher, and are developing in the direction of high resolution, large field of view and small distortion; at the same time, as the requirements for night driving in automatic driving gradually increase, the requirements for night vision functions of vehicle lenses are also getting higher and higher. However, the vehicle lenses in the related technologies have serious aberration problems such as lens chromatic aberration, astigmatism, and distortion, and the overall size of the vehicle lenses in the related technologies is large, which cannot meet the design requirements of miniaturization and the imaging requirements of a large viewing angle. Summary of the invention

[0003] The present application provides an optical lens, an imaging module and a terminal device, which can satisfy the miniaturization design of the optical lens while having a large field of view and improving the imaging quality.

[0004] In order to achieve the above-mentioned purpose, in a first aspect, an embodiment of the present application discloses an optical lens, comprising seven lenses with refractive power, wherein the lenses include 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;

[0005] 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;

[0006] 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;

[0007] 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;

[0008] 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;

[0009] 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;

[0010] 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;

[0011] 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;

[0012] The optical lens satisfies the following relationship:

[0013] 130deg≤FOV≤140deg and 7.1≤TTL / IMGH≤7.9;

[0014] Wherein, FOV is the maximum field of view 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, and IMGH is half of the image height corresponding to the maximum field of view of the optical lens.

[0015] In the optical lens provided by the present application, in order to meet the requirements of miniaturized design, large field of view and small distortion of the optical lens, the first lens has negative refractive power, and the object side and image side of the first lens are convex and concave respectively at the near optical axis, so that the first lens is formed into a concave-convex lens, which can effectively collect incident light with a large field of view, so that more light can enter the optical lens, and the optical lens has a large field of view. The second lens also has negative refractive power, and its object side and image side are concave and convex respectively at the near optical axis, which is conducive to the smooth entry of light into the optical lens, thereby correcting the distortion of the optical lens and reducing the aberration generated by the optical lens, and improving the imaging quality. The third lens has positive refractive power, and its object side and image side are convex and concave at the near optical axis, which is conducive to correcting the field curvature of the optical lens, and can collect and compress the light, so that the light can smoothly transition to the rear lens; the fourth lens has positive refractive power, and its object side and image side are convex at the near optical axis, which is conducive to correcting the aberration of the optical lens, and can reduce the incident angle of the light after the light passes through the aperture, so that more light can enter the optical lens. The fifth lens has positive refractive power, and its object side and image side are convex at the near optical axis, and the third lens has negative refractive power, and its object side and image side are concave, which helps to eliminate chromatic aberration, correct the astigmatism of the optical lens, and improve the imaging quality of the optical lens. The seventh lens has positive refractive power, and its object side and image side are convex and concave at the near optical axis, which can converge the light, reduce the total length of the optical lens, and further realize the miniaturization design of the optical lens.

[0016] The optical lens satisfies the relationship 130deg≤FOV≤140deg, so that the optical lens has a large field of view and can achieve wide-angle imaging.

[0017] Furthermore, the optical lens satisfies the relationship 7.1≤TTL / IMGH≤7.9, and can realize large image surface imaging while taking into account the miniaturized design of the optical lens, thereby helping to improve the imaging clarity of the optical lens, and further helping to improve the imaging quality of the optical lens.

[0018] In some optional implementations, the optical lens satisfies the relationship:

[0019] 0.92≤F / IMGH≤0.98, and / or, 1.4≤F7 / R13≤1.8, and / or 1.7≤FNO≤1.9;

[0020] Among them, F is the focal length of the optical lens, F7 is the focal length of the seventh lens, R13 is the radius of curvature of the object side of the seventh lens at the optical axis, and FNO is the aperture number of the optical lens.

[0021] The optical lens satisfies the relationship 0.92≤F / IMGH≤0.98, which can enable the optical lens to meet the requirements of a large target surface while satisfying the requirements of adapting the optical lens to a large-size imaging surface and miniaturizing the optical lens.

[0022] The optical lens satisfies the relationship 1.4≤F7 / R13≤1.8, and can reasonably control the curvature radius and focal length of the seventh lens, which is beneficial to reducing optical sensitivity, facilitating aberration correction, and improving the imaging quality of the optical lens.

[0023] The optical lens satisfies the relationship 1.7≤FNO≤1.9, and can have a large aperture, provide sufficient light input, and meet the imaging requirements in dark environments (rainy days, nighttime).

[0024] In some optional implementations, the optical lens satisfies the relationship:

[0025] 0.18≤SD1 / TTL≤0.24, and / or, 10≤R1 / F≤35, and / or, 3.5≤CT1 / SAGS1≤6.5;

[0026] Among them, SD1 is the maximum effective semi-aperture of the object side surface of the first lens, R1 is the radius of curvature of the object side surface of the first lens at the optical axis, F is the focal length of the optical lens, CT1 is the thickness of the first lens on the optical axis, and SAGS1 is the distance from the maximum effective semi-aperture of the object side surface of the first lens to the intersection of the object side surface of the first lens and the optical axis in the direction of the optical axis.

[0027] The optical lens satisfies the relationship 0.18≤SD1 / TTL≤0.24, and can reasonably control the maximum effective semi-aperture of the object side of the first lens. While achieving a large field of view, the aperture of the object side of the first lens is controlled to take into account the miniaturized design of the optical lens.

[0028] The optical lens satisfies the relationship 10≤R1 / F≤35. By controlling the curvature radius of the object side surface of the first lens, the object side surface of the first lens is made smoother, which is beneficial to achieving wide-angle imaging of the optical lens.

[0029] The optical lens satisfies the relationship 3.5≤CT1 / SAGS1≤6.5, and can reasonably control the surface shape and thickness of the first lens, thereby controlling the overall thickness of the first lens on the optical axis, making the first lens thinner and lighter.

[0030] In some optional implementations, the optical lens satisfies the relationship:

[0031] 15≤|F56 / F|≤200, and / or, -1.8≤F6 / F≤-1.1, and / or, 1.8≤F7 / F≤2;

[0032] Among them, F56 is the combined focal length of the fifth lens and the sixth lens, F is the focal length of the optical lens, F6 is the focal length of the sixth lens, and F7 is the focal length of the seventh lens.

[0033] The optical lens satisfies the relationship 15≤|F56 / F|≤200, and can reasonably allocate the combined focal length of the fifth lens and the sixth lens, which is beneficial to correcting chromatic aberration and balancing various aberrations, thereby improving the resolution capability of the optical lens, and can reduce tolerance sensitivity, which helps to improve the imaging quality of the optical lens.

[0034] The optical lens satisfies the relationship -1.8≤F6 / F≤-1.1, 1.8≤F7 / F≤2, which can make the focal length distribution of the sixth lens and the seventh lens reasonable, make the aberration of the optical lens easy to correct, and help improve the imaging quality of the optical lens.

[0035] In some optional implementations, the optical lens satisfies the relationship:

[0036] 0.4≤CT67 / CT6≤0.6, and / or, |(Vd5-Vd6) / F56|≤0.62mm -1 , and / or, 10≤TTL / (CT5+CT6)≤23;

[0037] Wherein, CT67 is the distance from the image side surface of the sixth lens to the object side surface of the seventh lens on the optical axis, CT6 is the thickness of the sixth lens on the optical axis, Vd5 is the Abbe number of the fifth lens, Vd6 is the Abbe number of the sixth lens, F56 is the combined focal length of the fifth lens and the sixth lens, and CT5 is the thickness of the fifth lens on the optical axis.

[0038] The optical lens satisfies the relationship 0.4≤CT67 / CT6≤0.6, and the thickness of the sixth lens and the distance between the sixth lens and the seventh lens on the optical axis can be reasonably controlled, which is beneficial to the miniaturized design of the optical lens.

[0039] The optical lens satisfies the relationship |(Vd5-Vd6) / F56|≤0.62mm-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 colors can be restored, and the imaging quality of the optical lens can be improved.

[0040] The optical lens satisfies the relationship 10≤TTL / (CT5+CT6)≤23. Since the fifth lens and the sixth lens can be combined into a cemented lens, the thickness of the cemented lens formed by combining the fifth lens and the sixth lens can be reasonably controlled by controlling the sum of the thicknesses of the fifth lens and the sixth lens, so that the optical lens can be miniaturized.

[0041] In some optional implementations, the optical lens satisfies the relationship:

[0042] 2.1≤SD1 / SD14≤3.5, and / or, 1≤SD6 / SD7≤1.65, and / or, 0.5≤SD14 / IMGH≤0.68;

[0043] Among them, SD1 is the maximum effective semi-aperture of the object side surface of the first lens, SD14 is the maximum effective semi-aperture of the image side surface of the seventh lens, SD6 is the maximum effective semi-aperture of the image side surface of the third lens, and SD7 is the maximum effective semi-aperture of the object side surface of the fourth lens.

[0044] The optical lens satisfies the relationship 2.1≤SD1 / SD14≤3.5, and while being able to realize wide-angle imaging of the optical lens, the optical lens is designed with a large image surface, thereby enabling the optical lens to meet the imaging requirements of a large target surface.

[0045] The optical lens satisfies the relationship 1≤SD6 / SD7≤1.65. Since the aperture of the optical lens of the present application is located between the third lens and the fourth lens, by limiting the maximum effective semi-aperture of the image side of the third lens and the maximum effective semi-aperture of the fourth lens, the difference between the maximum effective semi-apertures of the two lenses can be made small, and the aperture step difference between the two lenses can be reduced, so that the light can be guided to transition from the third lens to the fourth lens better and more smoothly.

[0046] The optical lens satisfies the relationship 0.5≤SD14 / IMGH≤0.68, which enables the maximum effective semi-aperture of the image-side surface of the seventh lens to adapt to the imaging surface of the optical lens, thereby enabling more light to enter the imaging surface of the optical lens from the seventh lens, which is beneficial to improving the imaging quality of the optical lens.

[0047] In some optional implementations, the optical lens satisfies the relationship:

[0048] 9≤R1 / R2≤30, and / or, -1≤(R5-R6) / (R5+R6)≤-0.2, and / or, -0.95≤(R13-R14) / (R13+R14)≤-0.85;

[0049] Among them, 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, 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.

[0050] The optical lens satisfies the relationship 9≤R1 / R2≤30. By reasonably matching the ratio of the curvature radius of the object side and the image side of the first lens, the surface difference of the first lens is reasonably set, which is beneficial to control the shape of the first lens, correct the aberration generated by itself, and improve the imaging quality. In addition, it is also beneficial to the molding of the first lens and reduce the difficulty of processing.

[0051] The optical lens satisfies the relationship -1≤(R5-R6) / (R5+R6)≤-0.2. By reasonably setting the difference in the curvature radii of the object side and the image side of the third lens, the incident light refracted by the first lens and the second lens can be effectively collected and compressed, so that the light can smoothly transition to the rear lens, reduce aberrations, and improve the imaging quality of the optical lens.

[0052] The optical lens satisfies the relationship -0.95≤(R13-R14) / (R13+R14)≤-0.85. The difference in the radius of curvature of the object side and the image side of the seventh lens is reasonably set, which can correct the aberration generated by the front lens, which is beneficial to improving the imaging quality of the optical lens. In addition, the surface shape of the seventh lens can be reasonably controlled to reduce its molding difficulty.

[0053] In some optional implementations, the optical lens satisfies the relationship:

[0054] 34mm≤TTL*IMGH / F≤37mm, and / or, 1.4≤SD1 / IMGH≤1.9, and / or, 0.3≤SAGS13 / CT7≤0.42;

[0055] Among them, SD1 is the maximum effective semi-aperture of the object side of the first lens, F is the focal length of the optical lens, SAGS13 is the distance from the maximum effective semi-aperture of the object side of the seventh lens to the intersection of the object side of the seventh lens and the optical axis in the direction of the optical axis, and CT7 is the thickness of the seventh lens on the optical axis.

[0056] The optical lens satisfies the relationship 34mm≤TTL*IMGH / F≤37mm, which can enable the optical lens to meet the needs of a large target surface while satisfying the needs of adapting the optical lens to a large-size imaging surface and miniaturizing the optical lens.

[0057] The optical lens satisfies the relationship 1.4≤SD1 / IMGH≤1.9. By reasonably controlling the maximum effective semi-aperture of the object side of the first lens, wide-angle imaging can be achieved while also enabling the optical lens to have a large image surface and high-pixel imaging quality.

[0058] The optical lens satisfies the relationship 0.3≤SAGS13 / CT7≤0.42, and can reasonably control the surface shape and thickness of the seventh lens, thereby controlling the overall thickness of the seventh lens on the optical axis, making the seventh lens thinner and lighter.

[0059] 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, wherein the image sensor is arranged on the image side of the optical lens.

[0060] In a third aspect, the present application discloses a terminal device, including a device body and an imaging module as described in the second aspect above, wherein the imaging module is arranged on the device body.

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

[0062] In the optical lens provided by the present application, in order to meet the requirements of miniaturized design, large field of view and small distortion of the optical lens, the first lens has negative refractive power, and the object side and image side of the first lens are convex and concave respectively at the near optical axis, so that the first lens is formed into a concave-convex lens, which can effectively collect incident light with a large field of view, so that more light can enter the optical lens, and the optical lens has a large field of view. The second lens also has negative refractive power, and its object side and image side are concave and convex respectively at the near optical axis, which is conducive to the smooth entry of light into the optical lens, thereby correcting the distortion of the optical lens and reducing the aberration generated by the optical lens, and improving the imaging quality. The third lens has positive refractive power, and its object side and image side are convex and concave at the near optical axis, which is conducive to correcting the field curvature of the optical lens, and can collect and compress the light, so that the light can smoothly transition to the rear lens; the fourth lens has positive refractive power, and its object side and image side are convex at the near optical axis, which is conducive to correcting the aberration of the optical lens, and can reduce the incident angle of the light after the light passes through the aperture, so that more light can enter the optical lens. The fifth lens has positive refractive power, and its object side and image side are convex at the near optical axis, and the third lens has negative refractive power, and its object side and image side are concave, which helps to eliminate chromatic aberration, correct the astigmatism of the optical lens, and improve the imaging quality of the optical lens. The seventh lens has positive refractive power, and its object side and image side are convex and concave at the near optical axis, which can converge the light, reduce the total length of the optical lens, and further realize the miniaturization design of the optical lens.

[0063] The optical lens satisfies the relationship 130deg≤FOV≤140deg, so that the optical lens has a large field of view and can achieve wide-angle imaging.

[0064] Furthermore, satisfying the relationship 7.1≤TTL / IMGH≤7.9 can achieve large image plane imaging while taking into account the miniaturized design of the optical lens, thereby helping to improve the imaging clarity of the optical lens, and further helping to improve the imaging quality of the optical lens. BRIEF DESCRIPTION OF THE DRAWINGS

[0065] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, 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 invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

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

[0067] Figure 2 is a spherical aberration diagram, an astigmatism curve diagram, and a distortion curve diagram of the optical lens disclosed in the first embodiment of the present application;

[0068] Figure 3 is a schematic structural diagram of an optical lens disclosed in the second embodiment of the present application;

[0069] Figure 4 is a spherical aberration diagram, an astigmatism curve diagram, and a distortion curve diagram of the optical lens disclosed in the second embodiment of the present application;

[0070] Figure 5 is a schematic structural diagram of an optical lens disclosed in the third embodiment of the present application;

[0071] Figure 6 is a spherical aberration diagram, an astigmatism curve diagram, and a distortion curve diagram of the optical lens disclosed in the third embodiment of the present application;

[0072] Figure 7 is a schematic structural diagram of an optical lens disclosed in a fourth embodiment of the present application;

[0073] Figure 8 is a spherical aberration diagram, an astigmatism curve diagram, and a distortion curve diagram of the optical lens disclosed in the fourth embodiment of the present application;

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

[0075] Fig.10 is a spherical aberration diagram, an astigmatism curve diagram, and a distortion curve diagram of the optical lens disclosed in the fifth embodiment of the present application;

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

[0077] Fig.12 It is a structural schematic diagram of the terminal device disclosed in this application applied to a car. DETAILED DESCRIPTION

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

[0079] In the present invention, the directions or positional relationships indicated by the terms "inside" and "outside" are based on the directions or positional relationships shown in the drawings. These terms are mainly used to better describe the present invention and its embodiments, and are not used to limit the indicated devices, elements or components to have a specific direction, or to be constructed and operated in a specific direction.

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

[0081] In addition, the terms "disposed" and "set at" should be understood in a broad sense. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

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

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

[0084] See also Figure 1 The present application discloses an optical lens 100, which includes a first lens L1, a second lens L2, a third lens L3, a fourth lens L4, a fifth lens L5, a sixth lens L6, and a seventh lens L7, which are arranged in sequence from the object side to the image side along the optical axis. When imaging, light enters the first lens L1, the second lens L2, the third lens L3, the fourth lens L4, the fifth lens L5, the sixth lens L6, and the seventh lens L7 in sequence from the object side of the first lens L1, and is finally imaged on the imaging surface IMG of the optical lens 100.

[0085] In some embodiments, the first lens L1 has negative refractive power, the second lens L2 has negative refractive power, the third lens L3 has positive refractive power, the fourth lens L4 has positive refractive power, the fifth lens L5 has positive refractive power, the sixth lens L6 has negative refractive power, and the seventh lens L7 has positive refractive power.

[0086] In some embodiments, the object-side surface S1 of the first lens L1 is a convex surface at the near optical axis, and the image-side surface S2 of the first lens L1 is a concave surface at the near optical axis. The object-side surface S3 of the second lens L2 is a concave surface at the near optical axis, and the image-side surface S4 of the second lens L2 is a convex surface at the near optical axis. The object-side surface S5 of the third lens L3 is a convex surface at the near optical axis, and the image-side surface S6 of the third lens L3 is a convex surface at the near optical axis. The object-side surface S7 of the fourth lens L4 is a convex surface at the near optical axis, and the image-side surface S8 of the fourth lens L4 is a convex surface at the near optical axis. The object-side surface S9 and the image-side surface S10 of the fifth lens L5 may both be convex surfaces at the near optical axis. The object-side surface S11 and the image-side surface S12 of the sixth lens L6 may both be concave surfaces at the near optical axis. The object-side surface S13 of the seventh lens L7 is a convex surface at the near optical axis, and the image-side surface S14 of the seventh lens is a concave surface at the near optical axis.

[0087] Optionally, all of the seven lenses may be plastic lenses, so that the optical lens 100 is relatively light and convenient for processing complex surfaces. Alternatively, all of the seven lenses may be glass lenses, or some of the lenses may be plastic lenses and some of the lenses may be glass lenses.

[0088] Optionally, the first lens L1 to the seventh lens L7 may all be spherical lenses, or may all be aspherical lenses. Alternatively, some may be spherical lenses and some may be aspherical lenses. For example, 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 may all be spherical lenses, and the seventh lens L7 may be an aspherical lens. In this way, the combination of spherical lenses and aspherical lenses can improve high-order aberrations and thus improve imaging quality.

[0089] In some embodiments, the optical lens 100 may further include an aperture STO, which is disposed between the third lens L3 and the fourth lens L4, and a central aperture STO is adopted, which is beneficial to the aberration correction of the optical lens 100. Of course, as other examples, the aperture STO may also be disposed between other lenses, for example, between the second lens L2 and the third lens L3, or between the first lens L1 and the second lens L2, and may be disposed specifically according to actual needs, and this embodiment does not specifically limit this.

[0090] In some embodiments, the optical lens 100 further includes a filter IR, which is disposed between the image side surface S14 of the seventh lens L7 and the imaging surface IMG of the optical lens 100. In this embodiment, the filter IR may be 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 IR may also be 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 light of other bands such as visible light; and the optical lens 100 can be used as an infrared optical lens, 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 IR can be made of glass. Of course, in other embodiments, the filter IR can also be made of optical glass coating, or a filter IR of other materials, which can be selected according to actual needs and is not specifically limited in this embodiment.

[0091] In some embodiments, the optical lens 100 further includes a protective glass CG, which is disposed between the filter IR and the imaging surface IMG, so that the protective glass CG can be close to the image sensor during subsequent assembly to play a protective role.

[0092] In some embodiments, the optical lens 100 satisfies the relationship 130deg≤FOV≤140deg, where FOV is the maximum field of view of the optical lens 100. When the optical lens 100 satisfies the relationship, the optical lens has a large field of view, thereby achieving wide-angle imaging.

[0093] In some embodiments, the optical lens 100 satisfies the relationship 1.7≤FNO≤1.9, where FNO is the aperture number of the optical lens 100. In this way, the optical lens 100 has the characteristic of a large aperture, which can increase the amount of light entering the optical lens 100, so that the optical lens 100 can also be used at night or in scenes with low ambient brightness (such as rainy days), thereby meeting the imaging requirements of dark environments.

[0094] In some embodiments, the optical lens 100 satisfies the relationship 7.5≤TTL / F≤8.5, wherein TTL is the distance from the object side surface S1 of the first lens L1 to the imaging surface of the optical lens 100 on the optical axis, and F is the focal length of the optical lens 100. When the optical lens 100 satisfies this relationship, the optical lens 100 can be miniaturized while having a wide-angle characteristic.

[0095] In some embodiments, the optical lens 100 satisfies the relationship 0.92≤F / IMGH≤0.98, where IMGH is half of the image height corresponding to the maximum field angle of the optical lens 100. When this relationship is satisfied, the optical lens 100 can meet the requirements of a large target surface while satisfying the requirements of adapting the optical lens 100 to a large-sized imaging surface and miniaturizing the optical lens 100.

[0096] In some embodiments, the optical lens 100 satisfies the relationship 1.4≤F7 / R13≤1.8, where F7 is the focal length of the seventh lens L7, and R13 is the radius of curvature of the object side surface S13 of the seventh lens L7 at the optical axis. When this relationship is satisfied, the radius of curvature and the focal length of the seventh lens L7 can be reasonably controlled, which is beneficial to reducing the optical sensitivity, facilitating the correction of aberrations, and improving the imaging quality of the optical lens 100.

[0097] In some embodiments, the optical lens 100 satisfies the relationship 0.18≤SD1 / TTL≤0.24, where SD1 is the maximum effective semi-aperture of the object-side surface S1 of the first lens L1. When this relationship is satisfied, the maximum effective semi-aperture of the object-side surface S1 of the first lens L1 can be reasonably controlled. When a large field of view is achieved, the aperture of the object-side surface S1 of the first lens L1 is controlled to take into account the miniaturization design of the optical lens 100.

[0098] In some embodiments, the optical lens 100 satisfies the relationship 3.5≤CT1 / SAGS1≤6.5, wherein SAGS1 is the distance from the maximum effective semi-aperture of the object side surface S1 of the first lens L1 to the intersection of the object side surface S1 of the first lens L1 and the optical axis in the direction of the optical axis (i.e., the sagittal height of the object side surface S1 of the first lens L1), and CT1 is the thickness of the first lens L1 on the optical axis. The surface shape of the first lens L1 and the thickness of the first lens L1 can be reasonably controlled, thereby controlling the overall thickness of the first lens L1 on the optical axis, making the first lens L1 thinner and lighter.

[0099] In some embodiments, the optical lens 100 satisfies the relationship 10≤R1 / F≤35. By controlling the curvature radius of the object-side surface S1 of the first lens L1, the object-side surface S1 of the first lens L1 is made flatter, which is beneficial to achieving wide-angle imaging of the optical lens 100.

[0100] In some embodiments, the optical lens 100 satisfies the relationship 15≤|F56 / F|≤200, where F56 is the combined focal length of the fifth lens L5 and the sixth lens L6. The fifth lens L5 and the sixth lens L6 can form a cemented lens. Based on this, by limiting 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, thereby improving the resolution of the optical lens 100, and reducing the tolerance sensitivity, which is conducive to improving the imaging quality of the optical lens 100.

[0101] In some embodiments, the optical lens 100 satisfies the relationship -2≤F1 / F≤-1.5. Wherein, F1 is the focal length of the first lens L1. When this relationship is satisfied, the focal length of the first lens L1 can be reasonably allocated, so that the first lens L1 can provide negative refractive power, and the first lens L1 can have a reasonable refractive power distribution, which is conducive to light convergence, and at the same time helps to reduce the comprehensive spherical aberration, chromatic aberration, and distortion of the first lens L1 to a reasonable position, reducing the design difficulty of the subsequent lenses, and at the same time improving the overall resolution of the optical lens 100, and strengthening the peripheral aberration correction of the optical lens 100. In addition, it is also conducive to the size compression of the first lens L1, thereby helping to form a small-sized optical lens 100.

[0102] In some embodiments, the optical lens 100 satisfies the relationship -80≤F2 / F≤-20, where F2 is the focal length of the second lens L2. By controlling the ratio of the focal length of the second lens L2 to the focal length of the optical lens 100, the focal length of the second lens L2 can be reasonably allocated, the angle of the light incident from the first lens L1 can be reduced, and the overall resolution of the optical lens 100 can be improved, and the peripheral aberration correction of the optical lens 100 can be strengthened.

[0103] In some embodiments, the optical lens 100 satisfies the relationship 3.5≤F3 / F≤5, where F3 is the focal length of the third lens L3. When the relationship is satisfied, the focal length of the third lens L3 can be reasonably allocated, so that the third lens L3 can provide positive refractive power to the optical lens 100, thereby providing the optical lens 100 with better light convergence ability, and at the same time can correct the distortion of the optical lens 100 and reduce the aberration generated by the optical lens 100, thereby improving the imaging quality of the optical lens 100.

[0104] In some embodiments, the optical lens 100 satisfies the relationship |F4 / F|≤85, where F4 is the focal length of the fourth lens L4. When the relationship is satisfied, the focal length of the fourth lens L4 can be reasonably allocated, so that the fourth lens L4 can provide positive refractive power to the optical lens 100, thereby providing the optical lens 100 with better light convergence ability, and at the same time, can correct the distortion of the optical lens 100 and reduce the aberration generated by the optical lens 100, thereby improving the imaging quality of the optical lens 100.

[0105] In some embodiments, the optical lens 100 satisfies the relationship 1.5 ≤ F5 / F ≤ 3.6, where F5 is the focal length of the fifth lens L5. When this relationship is satisfied, the refractive power of the fifth lens L5 can be reasonably distributed, so that the optical lens 100 can have better light converging ability, and at the same time, the distortion of the optical lens 100 can be corrected and the aberration generated by the optical lens 100 can be reduced, thereby improving the imaging quality of the optical lens 100.

[0106] In some embodiments, the optical lens 100 satisfies the relationship -1.8 ≤ F6 / F ≤ -1.1, where F6 is the focal length of the sixth lens L6. When this relationship is satisfied, the focal length of the sixth lens L6 can be reasonably distributed, and the refractive power of the fifth lens can be reasonably distributed, so that the distortion of the optical lens 100 can be corrected and the aberration generated by the optical lens 100 can be reduced, thereby improving the imaging quality of the optical lens 100.

[0107] In some embodiments, the optical lens 100 satisfies the relationship 1.8 ≤ F7 / F ≤ 2, where F7 is the focal length of the seventh lens L7. Since the seventh lens L7 provides a positive refractive power for the optical lens 100 and provides the main light converging ability of the lens group of the optical lens 100, therefore, by controlling the ratio relationship between the focal length of the seventh lens L7 and the focal length of the optical lens 100, it is beneficial to reasonably distribute the positive optical power of the optical lens 100 and shorten the overall optical length of the optical lens 100. When exceeding the upper limit of the relationship, the focal length of the seventh lens L7 becomes larger, the light deflection is large, and it is easy to increase the aberration of the off-axis field of view. When lower than the lower limit of the relationship, the focal length of the optical lens 100 is too large, and the overall length of the optical lens 100 is too long, which is not conducive to the miniaturization design of the optical lens 100. Optionally, the relationship can further satisfy 4 < F7 / F < 20, so that the focal length of the seventh lens L7 is reasonable, which is due to the miniaturization design of the optical lens 100.

[0108] In some embodiments, the optical lens 100 satisfies the relationship -8 ≤ F1 / CT1 ≤ -3, where CT1 is the thickness of the first lens L1 on the optical axis. When this relationship is satisfied, the refractive power and thickness of the first lens L1 can be reasonably configured, so that the incident angle of light in the optical lens 100 can be effectively controlled, the sensitivity of the optical lens 100 can be reduced, which is beneficial to correcting the aberration generated by the optical lens 100, and further beneficial to improving the imaging quality of the optical lens 100.

[0109] In some embodiments, the optical lens 100 satisfies the relationship -90≤F2 / CT2≤-15, where CT2 is the thickness of the second lens L2 on the optical axis. When the relationship is satisfied, the refractive power and thickness of the second lens L2 can be reasonably configured, so that the incident angle of the light in the optical lens 100 can be effectively controlled, the sensitivity of the optical lens 100 can be reduced, and the aberration generated by the optical lens 100 can be corrected, thereby improving the imaging quality of the optical lens 100.

[0110] In some embodiments, the optical lens 100 satisfies the relationship 3≤F3 / CT3≤6, where CT3 is the thickness of the third lens L3 on the optical axis. When the relationship is satisfied, the refractive power and thickness of the third lens L3 can be reasonably configured, so that the light can enter the optical lens 100 more smoothly, the sensitivity of the optical lens 100 is reduced, and the aberration generated by the optical lens 100 is corrected, thereby improving the imaging quality of the optical lens 100.

[0111] In some embodiments, the optical lens 100 satisfies the relationship F4 / CT4≥7, where CT4 is the thickness of the fourth lens L4 on the optical axis. When the relationship is satisfied, the refractive power and thickness of the fourth lens L4 can be reasonably configured, so that light can enter the optical lens 100 more smoothly, reduce the sensitivity of the optical lens 100, and help correct the aberrations generated by the optical lens 100, thereby helping to improve the imaging quality of the optical lens 100.

[0112] In some embodiments, the optical lens 100 satisfies the relationship 3≤F5 / CT5≤20, where CT5 is the thickness of the fifth lens L5 on the optical axis. When the relationship is satisfied, the refractive power and thickness of the fifth lens L5 can be reasonably configured, so that the light can enter the optical lens 100 more smoothly, the sensitivity of the optical lens 100 is reduced, and the aberration generated by the optical lens 100 is corrected, thereby improving the imaging quality of the optical lens 100.

[0113] In some embodiments, the optical lens 100 satisfies the relationship -15≤F6 / CT6≤-9, where CT6 is the thickness of the sixth lens L6 on the optical axis. When the relationship is satisfied, the refractive power and thickness of the sixth lens L6 can be reasonably configured, so that light can enter the optical lens 100 more smoothly, the sensitivity of the optical lens 100 is reduced, and the aberration generated by the optical lens 100 is corrected, thereby improving the imaging quality of the optical lens 100.

[0114] In some embodiments, the optical lens 100 satisfies the relationship 2≤F7 / CT7≤3.1, where CT7 is the thickness of the seventh lens L7 on the optical axis. When the relationship is satisfied, the refractive power and thickness of the seventh lens L7 can be reasonably configured, so that the light can enter the optical lens 100 more smoothly, the sensitivity of the optical lens 100 is reduced, and the aberration generated by the optical lens 100 is corrected, thereby improving the imaging quality of the optical lens 100.

[0115] In some embodiments, the optical lens 100 satisfies the relationship 0.4≤CT67 / CT6≤0.6, where CT67 is the distance on the optical axis from the image side surface S12 of the sixth lens L6 to the object side surface S13 of the seventh lens L7. When the relationship is satisfied, the thickness of the sixth lens L6 and the distance between the sixth lens L6 and the seventh lens L7 on the optical axis can be reasonably controlled, thereby facilitating the miniaturization design of the optical lens 100.

[0116] In some embodiments, the optical lens 100 satisfies the relationship |(Vd5-Vd6) / F56|≤0.62mm-1. Wherein, Vd5 is the Abbe number of the fifth lens L5, and Vd6 is the Abbe number of the sixth lens L6. When the relationship is satisfied, by reasonably setting the ratio of the difference in the Abbe numbers of the fifth lens L5 and the sixth lens L6 to the combined focal length of the fifth lens L5 and the sixth lens L6, the chromatic aberration of the optical lens can be effectively corrected, the authenticity of the color can be restored, and the imaging quality of the optical lens can be improved.

[0117] In some embodiments, the optical lens 100 satisfies the relationship 10≤TTL / (CT5+CT6)≤23. Since the fifth lens L5 and the sixth lens L6 can be combined into a cemented lens, the thickness of the cemented lens formed by combining the fifth lens L5 and the sixth lens L6 can be reasonably controlled by controlling the sum of the thicknesses of the fifth lens L5 and the sixth lens L6, so that the optical lens 100 can be miniaturized.

[0118] In some embodiments, the optical lens 100 satisfies the relationship 2.1≤SD1 / SD14≤3.5. Wherein, SD1 is the maximum effective semi-aperture of the object side surface S1 of the first lens L1, and SD14 is the maximum effective semi-aperture of the image side surface S14 of the seventh lens L7. When this relationship is satisfied, while being able to realize wide-angle imaging of the optical lens 100, the optical lens 100 is designed to have a large image surface, thereby enabling the optical lens 100 to meet the imaging requirements of a large target surface.

[0119] In some embodiments, the optical lens 100 satisfies the relationship 1≤SD6 / SD7≤1.65. Wherein, 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. Since the aperture of the optical lens 100 of the present application is located between the third lens L3 and the fourth lens L4, by limiting the maximum effective semi-aperture of the image side surface S6 of the third lens L3 and the maximum effective semi-aperture of the object side surface S7 of the fourth lens L4, the difference between the maximum effective semi-apertures of the two can be made small, and the aperture step difference between the two can be reduced, so that the light can be guided to better and more smoothly transition from the third lens L3 to the fourth lens L4.

[0120] In some embodiments, the optical lens 100 satisfies the relationship 0.5≤SD14 / IMGH≤0.68. When the relationship is satisfied, the maximum effective semi-aperture of the image side surface S14 of the seventh lens L7 can be adapted to the imaging surface of the optical lens 100, thereby enabling more light to enter the imaging surface of the optical lens 100 from the seventh lens L7, which is beneficial to improving the imaging quality of the optical lens 100.

[0121] In some embodiments, the optical lens 100 satisfies the relationship 9≤R1 / R2≤30. When the relationship is satisfied, it is helpful to control the curvature radius of the object side surface S1 and the image side surface of the first lens L1, so that the surface of the object side surface S1 and the image side surface of the first lens L1 will not be too curved, thereby helping to control the shape of the first lens L1. At the same time, the aberration generated by itself can be corrected to improve the imaging quality.

[0122] In some embodiments, the optical lens 100 satisfies the relationship |≤R11 / R12|≤80, wherein R12 is the radius of curvature of the image-side surface S12 of the sixth lens L6 at the near optical axis, and R11 is the radius of curvature of the object-side surface S11 of the sixth lens L6 at the near optical axis. When this relationship is satisfied, the radius of curvature of the object-side surface S11 and the image-side surface of the sixth lens L6 can be reasonably controlled, so that the surface shapes of the object-side surface S11 and the image-side surface of the sixth lens L6 are not too curved, which is conducive to controlling the shape of the sixth lens L6.

[0123] In some embodiments, the optical lens 100 satisfies the relationship -1≤(R5-R6) / (R5+R6)≤-0.2, where R5 is the radius of curvature of the object side surface of the third lens L3 at the optical axis, and R6 is the radius of curvature of the image side surface of the third lens L3 at the optical axis. When this relationship is satisfied, the difference between the radius of curvature of the object side surface and the image side surface of the third lens L3 is reasonably set, which can effectively collect and compress the incident light after being refracted by the first lens L1 and the second lens L2, so that the light smoothly transitions to the rear lens, reduces aberrations, and improves the imaging quality of the optical lens.

[0124] In some embodiments, the optical lens 100 satisfies the relationship -0.95≤(R13-R14) / (R13+R14)≤-0.85, wherein R13 is the radius of curvature of the object side surface of the seventh lens L7 at the optical axis, and R14 is the radius of curvature of the image side surface of the seventh lens L7 at the optical axis. When the optical lens 100 satisfies the relationship, the difference between the radius of curvature of the object side surface and the image side surface of the seventh lens L7 is reasonably set, which can correct the aberration generated by the front lens, and is conducive to improving the imaging quality of the optical lens. In addition, the surface shape of the seventh lens L7 can also be reasonably controlled to reduce its molding difficulty.

[0125] In some embodiments, the optical lens 100 satisfies the relationship 34mm≤TTL*IMGH / F≤37mm. When the optical lens 100 satisfies the relationship, the optical lens 100 can meet the requirements of a large target surface while meeting the requirements of the optical lens 100 being adapted to a large-sized imaging surface and the optical lens being miniaturized.

[0126] In some embodiments, the optical lens 100 satisfies the relationship 1.4≤SD1 / IMGH≤1.9. By reasonably controlling the maximum effective semi-aperture of the object side of the first lens L1, wide-angle imaging can be achieved while also enabling the optical lens 100 to have a large image surface and high-pixel imaging quality.

[0127] In some embodiments, the optical lens 100 satisfies the relationship 0.3≤SAGS13 / CT7≤0.42, wherein SAGS13 is the distance from the maximum effective semi-aperture of the object side surface of the seventh lens to the intersection of the object side surface of the seventh lens and the optical axis in the direction of the optical axis (that is, the sagittal height of the seventh lens L7). When the optical lens 100 satisfies the relationship, the surface shape of the seventh lens L7 and the thickness of the seventh lens L7 can be reasonably controlled, thereby controlling the overall thickness of the seventh lens L7 on the optical axis, making the seventh lens L7 thinner and lighter.

[0128] In some embodiments, the optical lens 100 satisfies the relationship 72deg≤FOV / FNO≤78deg. When the relationship is satisfied, by reasonably controlling the relationship between the field of view angle and the aperture number 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 angle requirements, and at the same time make the aperture change within a reasonable range, providing a combination effect of a large viewing angle and a large aperture, and satisfying the characteristics of the optical lens 100 having a large aperture, high relative illumination and small distortion.

[0129] The optical lens 100 of this embodiment will be described in detail below with reference to specific parameters.

[0130] First embodiment

[0131] The structural schematic diagram of the optical lens 100 disclosed in the first embodiment of the present application is as follows Figure 1 As shown, the optical lens 100 includes a first lens L1, a second lens L2, a third lens L3, an aperture STO, a fourth lens L4, a fifth lens L5, a sixth lens L6, a seventh lens L7, a filter IR and a protective glass CG, which are arranged in sequence from the object side to the image side along the optical axis.

[0132] Taking the focal length F=4.058mm, the aperture number FNO=1.6, and the maximum field angle FOV=140deg of the optical lens 100 as an example, other parameters of the optical lens 100 are given in Table 1 below. 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 of the lens, and the surface with a larger surface number is the image side of the lens, such as surface numbers 1 and 2 correspond to the object side S1 and image side S2 of the first lens L1, respectively. The Y radius in Table 1 is the radius of curvature of the object side or image side 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 of the lens to the next surface on the optical axis. The value of the aperture STO in the "Thickness" parameter column is the distance from the aperture STO 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 STO is set on the image side of the next surface vertex. If the aperture STO thickness is a positive value, the aperture STO 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 587.6nm, and the focal length is obtained at a reference wavelength of 546nm.

[0133] In the first embodiment, both the object-side surface and the image-side surface 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:

[0134]

[0135] Among them, x is the distance vector height from the vertex of the aspheric surface when the aspheric surface is at a height of h along the optical axis; c is the curvature of the aspheric surface at the optical axis, c=1 / Y (that is, the paraxial curvature c is the reciprocal of the curvature radius Y in Table 1 above); K is the cone coefficient; Ai is the correction coefficient of the i-th order of the aspheric surface. The following Table 2 gives the high-order coefficients A4, A6, A8, A10, A12, A14, and A16 of the aspheric surface of the seventh lens L7.

[0136] Table 1

[0137]

[0138] Table 2

[0139]

[0140]

[0141] See also Figure 2 In (A), Figure 2 (A) is a spherical aberration curve of the optical lens 100 in the first embodiment 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 It can be seen from (A) that the spherical aberration value of the optical lens 100 in the first embodiment is better, which means that the imaging quality of the optical lens 100 in this embodiment is better.

[0142] See also Figure 2 In (B), Figure 2 (B) is the astigmatism diagram of the optical lens 100 in the first embodiment at a wavelength of 546 nm. The horizontal axis along the X-axis direction represents the focus offset in mm, and the vertical axis along the Y-axis direction represents the field angle in degrees. T in the astigmatism curve represents the curvature of the imaging surface IMG in the meridian direction, and S represents the curvature of the imaging surface IMG 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.

[0143] See also Figure 2 (C) in Figure 2 (C) is a distortion curve of the optical lens 100 in the first embodiment at a wavelength of 546 nm. The horizontal axis along the X-axis direction represents the distortion, and the vertical axis along the Y-axis direction represents the field of view, in degrees. Figure 2 As can be seen from (C) in FIG. 1 , at this wavelength, the image deformation caused by the main light beam is small, and the distortion of the optical lens 100 is well corrected.

[0144] Second embodiment

[0145] The structural schematic diagram of the optical lens 100 disclosed in the second embodiment of the present application is as follows Figure 3As shown, the optical lens 100 includes a first lens L1, a second lens L2, a third lens L3, an aperture STO, a fourth lens L4, a fifth lens L5, a sixth lens L6, a seventh lens L7, a filter IR and a protective glass CG, which are arranged in sequence from the object side to the image side along the optical axis.

[0146] 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 above embodiments, and will not be repeated here.

[0147] Table 3

[0148]

[0149]

[0150] In the second embodiment, Table 4 gives the high-order coefficients that can be used for each aspherical mirror surface in the second embodiment, wherein each aspherical surface type can be defined by the formula given in the first embodiment.

[0151] Table 4

[0152]

[0153] See also Figure 4 ,from Figure 4 It can be seen from the (A) spherical aberration curve, (B) light astigmatism diagram, and (C) distortion curve diagram 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 the first embodiment. Figure 2 (A) Figure 2 (B) Figure 2 The contents described in (C) will not be repeated here.

[0154] Third embodiment

[0155] The structural schematic diagram of the optical lens 100 disclosed in the third embodiment of the present application is as follows: Figure 5 As shown, the optical lens 100 includes a first lens L1, a second lens L2, a third lens L3, an aperture STO, a fourth lens L4, a fifth lens L5, a sixth lens L6, a seventh lens L7, a filter IR and a protective glass CG, which are arranged in sequence from the object side to the image side along the optical axis.

[0156] Other parameters of the optical lens 100 are given in the following Table 5. The definition of each parameter can be obtained from the description of the above embodiments, and will not be repeated here.

[0157] Table 5

[0158]

[0159]

[0160] In the third embodiment, Table 6 gives the high-order coefficients that can be used for each aspherical mirror surface in the third embodiment, wherein each aspherical surface type can be defined by the formula given in the first embodiment.

[0161] Table 6

[0162]

[0163] See also Figure 6 ,Depend on Figure 6 It can be seen from the (A) spherical aberration curve, (B) light astigmatism diagram, and (C) distortion curve diagram 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 the first embodiment. Figure 2 (A) Figure 2 (B) Figure 2 The contents described in (C) will not be repeated here.

[0164] Fourth embodiment

[0165] The structural schematic diagram of the optical lens 100 disclosed in the fourth embodiment of the present application is as follows: Figure 7 As shown, the optical lens 100 includes a first lens L1, a second lens L2, a third lens L3, an aperture STO, a fourth lens L4, a fifth lens L5, a sixth lens L6, a seventh lens L7, a filter IR and a protective glass CG, which are arranged in sequence from the object side to the image side along the optical axis.

[0166] Other parameters of the optical lens 100 are given in the following Table 7. The definition of each parameter can be obtained from the description of the above embodiments, and will not be repeated here.

[0167] Table 7

[0168]

[0169]

[0170] In the fourth embodiment, Table 8 gives the coefficients of the higher-order terms that can be used for each aspherical mirror surface in the fourth embodiment, wherein each aspherical surface type can be defined by the formula given in the first embodiment.

[0171] Table 8

[0172]

[0173] See also Figure 8 ,Depend on Figure 8 It can be seen from the (A) spherical aberration curve, (B) light astigmatism diagram, and (C) distortion curve diagram 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 the first embodiment. Figure 2 (A) Figure 2 (B) Figure 2 The contents described in (C) will not be repeated here.

[0174] Fifth embodiment

[0175] See also Fig. 9 The optical lens 100 includes a first lens L1, a second lens L2, a third lens L3, an aperture STO, a fourth lens L4, a fifth lens L5, a sixth lens L6, a seventh lens L7, a filter IR and a protective glass CG, which are arranged in sequence from the object side to the image side along the optical axis.

[0176] The structural schematic diagram of the optical lens 100 disclosed in the fifth embodiment of the present application is as follows Fig. 9 As shown, other parameters of the optical lens 100 are given in the following Table 9. The definition of each parameter can be obtained from the description of the above embodiments, and will not be repeated here.

[0177] Table 9

[0178]

[0179]

[0180] In the fifth embodiment, Table 10 gives the high-order coefficients that can be used for each aspherical mirror surface in the fifth embodiment, wherein each aspherical surface type can be defined by the formula given in the first embodiment.

[0181] Table 10

[0182]

[0183] See also Fig.10 ,Depend on Fig.10It can be seen from the (A) spherical aberration curve, (B) light astigmatism diagram, and (C) distortion curve diagram in FIG. 1 that the spherical aberration, astigmatism, and distortion of the optical lens 100 are well controlled, so that the optical lens 100 of this embodiment has good imaging quality. Fig.10 (A) Fig.10 (B) and Fig.10 The wavelengths corresponding to the curves in (C) can be referred to in the first embodiment. Figure 2 (A) Figure 2 (B) Figure 2 The contents described in (C) will not be repeated here.

[0184] Please refer to Table 11, which is a summary of the ratios of various relationship equations in the first to fifth embodiments of the present application.

[0185] Table 11

[0186]

[0187]

[0188] See also Fig.11 The present application also discloses an imaging module 200, which includes an image sensor 201 and an optical lens 100 as described in any one of the first to fifth embodiments, wherein the image sensor 201 is arranged on the image side of the optical lens 100. The photosensitive surface of the image sensor 201 is located on the imaging surface IMG 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 imaging 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 imaging module 200 with the above optical lens 100 has all the technical effects of the above optical lens 100, that is, the imaging module 200 can meet the design requirements of high-pixel imaging while meeting the miniaturization design of the optical lens 100. 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.

[0189] The present application also discloses a terminal device 300, which includes a device body 301 and the above-mentioned imaging module 200, and the imaging module 200 is arranged in the device body 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 The terminal device 300 can be applied to a vehicle, and the device body 301 can be a vehicle body, and the imaging module 200 can be set on the vehicle body, for example, inside the vehicle body or outside the vehicle body.

[0190] It can be understood that the terminal device 300 having the above-mentioned imaging module 200 also has all the technical effects of the above-mentioned optical lens 100. That is, the terminal device 300 can meet the design requirements of high-pixel imaging while satisfying the miniaturization design of the optical lens 100. 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.

[0191] The optical lens, imaging 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, imaging module and terminal device of the present application and its core ideas. At the same time, for those skilled in the art, according to the ideas of the present application, there will be changes in the specific implementation methods and application scopes. 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, and the lenses include 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 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, the object side surface of the seventh lens is convex at the near optical axis, and the image side surface of the seventh lens is concave at the near optical axis; The optical lens satisfies the following relationship: 130deg≤FOV≤140deg and 7.1≤TTL / IMGH≤7.9; Wherein, FOV is the maximum field of view 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, and IMGH is half of the image height corresponding to the maximum field of view of the optical lens.

2. The optical lens according to claim 1, characterized in that: The optical lens satisfies the following relationship: 0.92≤F / IMGH≤0.98, and / or, 1.4≤F7 / R13≤1.8, and / or 1.7≤FNO≤1.9; Among them, F is the focal length of the optical lens, F7 is the focal length of the seventh lens, R13 is the radius of curvature of the object side of the seventh lens at the optical axis, and FNO is the aperture number of the optical lens.

3. The optical lens according to claim 1, characterized in that: The optical lens satisfies the following relationship: 0.18≤SD1 / TTL≤0.24, and / or, 10≤R1 / F≤35, and / or, 3.5≤CT1 / SAGS1≤6.5; Among them, SD1 is the maximum effective semi-aperture of the object side surface of the first lens, R1 is the radius of curvature of the object side surface of the first lens at the optical axis, F is the focal length of the optical lens, CT1 is the thickness of the first lens on the optical axis, and SAGS1 is the distance from the maximum effective semi-aperture of the object side surface of the first lens to the intersection of the object side surface of the first lens and the optical axis in the direction of the optical axis.

4. The optical lens according to claim 1, characterized in that: The optical lens satisfies the following relationship: 15≤|F56 / F|≤200, and / or, -1.8≤F6 / F≤-1.1, and / or, 1.8≤F7 / F≤2; Among them, F56 is the combined focal length of the fifth lens and the sixth lens, F is the focal length of the optical lens, F6 is the focal length of the sixth lens, and F7 is the focal length of the seventh lens.

5. The optical lens according to claim 1, characterized in that: The optical lens satisfies the following relationship: 0.4≤CT67 / CT6≤0.6, and / or, |(Vd5-Vd6) / F56|≤0.62mm -1 , and / or, 10≤TTL / (CT5+CT6)≤23; Wherein, CT67 is the distance from the image side surface of the sixth lens to the object side surface of the seventh lens on the optical axis, CT6 is the thickness of the sixth lens on the optical axis, Vd5 is the Abbe number of the fifth lens, Vd6 is the Abbe number of the sixth lens, F56 is the combined focal length of the fifth lens and the sixth lens, and CT5 is the thickness of the fifth lens on the optical axis.

6. The optical lens according to claim 1, characterized in that: The optical lens satisfies the following relationship: 2.1≤SD1 / SD14≤3.5, and / or, 1≤SD6 / SD7≤1.65, and / or, 0.5≤SD14 / IMGH≤0.68; Among them, SD1 is the maximum effective semi-aperture of the object side surface of the first lens, SD14 is the maximum effective semi-aperture of the image side surface of the seventh lens, SD6 is the maximum effective semi-aperture of the image side surface of the third lens, and SD7 is the maximum effective semi-aperture of the object side surface of the fourth lens.

7. The optical lens according to claim 1, characterized in that: The optical lens satisfies the following relationship: 9≤R1 / R2≤30, and / or, -1≤(R5-R6) / (R5+R6)≤-0.2, and / or, -0.95≤(R13-R14) / (R13+R14)≤-0.85; Among them, 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, 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.

8. The optical lens according to claim 1, characterized in that: The optical lens satisfies the following relationship: 34mm≤TTL*IMGH / F≤37mm, and / or, 1.4≤SD1 / IMGH≤1.9, and / or, 0.3≤SAGS13 / CT7≤0.42; Among them, SD1 is the maximum effective semi-aperture of the object side of the first lens, F is the focal length of the optical lens, SAGS13 is the distance from the maximum effective semi-aperture of the object side of the seventh lens to the intersection of the object side of the seventh lens and the optical axis in the direction of the optical axis, and CT7 is the thickness of the seventh lens on the optical axis.

9. An imaging module, characterized in that: The imaging module comprises an image sensor and the optical lens according to any one of claims 1 to 8, wherein the image sensor is arranged on the image side of the optical lens.

10. A terminal device, characterized in that: It comprises a device body and an imaging module as claimed in claim 9, wherein the imaging module is arranged on the device body.

Images