Optical lenses, image modules and terminal equipment

Abstract

This application discloses an optical lens, an image-capturing module, and a terminal device. The optical lens includes seven lenses with refractive power. The first lens has negative refractive power, with a convex object-side surface and a concave image-side surface; the second lens has negative refractive power, with a concave object-side surface and a convex image-side surface; the third lens has positive refractive power, with a convex object-side surface and a concave image-side surface; the fourth lens has positive refractive power, with both the object-side and image-side surfaces being convex; the fifth lens has refractive power, with both the object-side and image-side surfaces being convex; the sixth lens has negative refractive power, with both the object-side and image-side surfaces being concave; and the seventh lens has positive refractive power, with both the object-side and image-side surfaces being convex and concave. The optical lens satisfies the following relationships: 130deg≤FOV≤140deg and 7.1≤TTL / IMGH≤7.9. The optical lens, image-capturing module, and terminal device of this application can achieve both miniaturization of the optical lens and a large field of view, while also improving image quality.

Description

Technical Field

[0001] This application relates to the field of optical imaging technology, and in particular to an optical lens, an image acquisition module, and a terminal device. Background Technology

[0002] With the development of the automotive industry, national requirements for road traffic safety and vehicle safety are constantly increasing. The application of ADAS (Advanced Driving Assistance System), DMS (Driver Monitoring System), and CMS (Camera Monitor System) in vehicle driving is gradually being promoted. Vehicle lenses are key components for acquiring external information in autonomous driving assistance systems. With the rapid development of autonomous driving assistance systems, the performance requirements for front-view optical lenses are also increasing, moving towards higher resolution, wider field of view, and lower distortion. Simultaneously, as autonomous driving places increasing demands on nighttime driving, the requirements for night vision capabilities in vehicle lenses are also rising. However, existing vehicle lenses suffer from significant aberrations such as chromatic aberration, astigmatism, and distortion. Furthermore, the overall size of existing vehicle lenses is relatively large, failing to meet the requirements for miniaturization and wide-angle imaging. Summary of the Invention

[0003] This application provides an optical lens, an image acquisition module, and a terminal device that can achieve both miniaturization of the optical lens and a large field of view, while also improving image quality.

[0004] To achieve the above objectives, in a first aspect, embodiments of this application disclose an optical lens comprising seven lenses with refractive power, the lenses including a first lens, a second lens, a third lens, a fourth lens, a fifth lens, a sixth lens, and a seventh lens arranged sequentially along the optical axis from the object side to the image side;

[0005] The first lens has negative refractive power, the object side of the first lens is convex near the optical axis, and the image side of the first lens is concave near the optical axis.

[0006] The second lens has negative refractive power, the object side of the second lens is concave near the optical axis, and the image side of the second lens is convex near the optical axis;

[0007] The third lens has positive refractive power, the object side of the third lens is convex near the optical axis, and the image side of the third lens is concave near the optical axis.

[0008] The fourth lens has positive refractive power, and both the object-side and image-side surfaces of the fourth lens are convex near the optical axis.

[0009] The fifth lens has positive refractive power, and both the object-side and image-side surfaces of the fifth lens are convex near the optical axis.

[0010] The sixth lens has negative refractive power, and both the object-side and image-side surfaces of the sixth lens are concave near the optical axis.

[0011] The seventh lens has positive refractive power, the object side of the seventh lens is convex near the optical axis, and the image side of the seventh lens is concave near the optical axis.

[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 on the optical axis from the object side of the first lens to the imaging surface of the optical lens, and IMGH is half the image height corresponding to the maximum field of view of the optical lens.

[0015] In the optical lens provided in this application, to meet the requirements of miniaturization, a large field of view, and low distortion, the first lens has negative refractive power. The object-side and image-side surfaces of the first lens are convex and concave near the optical axis, respectively, making the first lens a concave-convex lens. This effectively collects incident light rays with a large field of view, allowing more light to enter the optical lens and thus giving it a large field of view. The second lens also has negative refractive power, with its object-side and image-side surfaces being concave and convex near the optical axis, respectively. This facilitates the smooth entry of light into the optical lens, thereby correcting optical lens distortion and reducing aberrations, improving image quality. The third lens has positive refractive power, and its object-side and image-side surfaces are convex and concave near the optical axis, respectively. This helps correct field curvature of the optical lens and collects and compresses light, allowing it to smoothly transition into the rear lens. The fourth lens has positive refractive power, and its object-side and image-side surfaces are convex near the optical axis. This helps correct aberrations in the optical lens and reduces the angle of incidence of light after passing through the aperture, allowing more light to enter the optical lens. The fifth lens has positive refractive power, and its object-side and image-side surfaces are convex near the optical axis. Combined with the third lens's negative refractive power and concave object-side and image-side surfaces, this helps eliminate chromatic aberration and correct astigmatism, improving the image quality of the optical lens. The seventh lens has positive refractive power, and its object-side and image-side surfaces are convex and concave near the optical axis, respectively. This allows for light convergence, reducing the overall length of the optical lens and further enabling miniaturization.

[0016] The optical lens satisfies the relationship 130deg≤FOV≤140deg, thus giving it a large field of view and enabling wide-angle imaging.

[0017] Furthermore, the optical lens satisfies the relationship 7.1≤TTL / IMGH≤7.9, which allows for both miniaturization of the optical lens and large image plane imaging, thereby improving the image sharpness and ultimately the image quality of the optical lens.

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

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

[0020] Wherein, 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 enables the optical lens to meet the requirements of large target surfaces while adapting to large imaging surfaces and miniaturizing the optical lens.

[0022] The optical lens satisfies the relationship 1.4≤F7 / R13≤1.8, which allows for reasonable control of the curvature radius and focal length of the seventh lens. This helps to reduce optical sensitivity, facilitates aberration correction, and improves the imaging quality of the optical lens.

[0023] The optical lens satisfies the relation 1.7≤FNO≤1.9, enabling it to have a large aperture, provide sufficient light intake, and meet the imaging needs in low-light environments (rainy days, nighttime).

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

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

[0026] Wherein, SD1 is the maximum effective half-aperture of the object side of the first lens, R1 is the radius of curvature of the object side 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 in the optical axis direction from the maximum effective half-aperture of the object side of the first lens to the intersection of the object side of the first lens and the optical axis.

[0027] The optical lens satisfies the relationship 0.18≤SD1 / TTL≤0.24, which can reasonably control the maximum effective half-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 miniaturization design of the optical lens.

[0028] The optical lens satisfies the relationship 10≤R1 / F≤35. By controlling the radius of curvature 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, which 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 and making the first lens thinner and lighter.

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

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

[0032] Wherein, 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] An optical lens that satisfies the relationship 15≤|F56 / F|≤200 can reasonably allocate the combined focal length of the fifth and sixth lenses, which is beneficial for correcting chromatic aberration and balancing various aberrations, thereby improving the resolving power of the optical lens and reducing tolerance sensitivity, which helps to improve the imaging quality of the optical lens.

[0034] The optical lens satisfies the relationships -1.8≤F6 / F≤-1.1 and 1.8≤F7 / F≤2, which enables the focal length allocation of the sixth and seventh lenses to be reasonable, making it easier to correct the aberrations of the optical lens and improving the imaging quality of the optical lens.

[0035] In some alternative implementations, the optical lens satisfies the following 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 on the optical axis from the image side of the sixth lens to the object side of the seventh lens, 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 and sixth lenses, 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, which allows for reasonable control of the thickness of the sixth lens and the distance between the sixth lens and the seventh lens on the optical axis, thus facilitating the miniaturization 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 Abbe number difference between the fifth and sixth lenses to the combined focal length of the fifth and sixth lenses, 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 and sixth lenses can be combined into a cemented lens, by controlling the sum of the thicknesses of the fifth and sixth lenses, the thickness of the cemented lens after the combination of the fifth and sixth lenses can be reasonably controlled, enabling the optical lens to achieve miniaturization design.

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

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

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

[0044] The optical lens satisfies the relationship 2.1≤SD1 / SD14≤3.5, which enables the optical lens to achieve wide-angle imaging while also taking into account the design of a large image plane, thus enabling the optical lens to meet the imaging requirements of a large target area.

[0045] The optical lens satisfies the relationship 1≤SD6 / SD7≤1.65. Since the aperture stop of the optical lens in this application is located between the third lens and the fourth lens, by limiting the maximum effective half-aperture of the image side of the third lens and the maximum effective half-aperture of the fourth lens, the difference between their maximum effective half-apertures can be minimized, reducing the aperture step difference between them. This allows the light to be guided to transition from the third lens to the fourth lens more smoothly and effectively.

[0046] The optical lens satisfies the relationship 0.5≤SD14 / IMGH≤0.68, which allows the maximum effective half-aperture of the image side of the seventh lens to be adapted to the imaging surface of the optical lens. This enables more light to enter the imaging surface of the optical lens through the seventh lens, which is beneficial to improving the imaging quality of the optical lens.

[0047] In some alternative implementations, the optical lens satisfies the following 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] Wherein, R1 is the radius of curvature of the object side of the first lens at the optical axis, R2 is the radius of curvature of the image side of the first lens at the optical axis, R5 is the radius of curvature of the object side of the third lens at the optical axis, R6 is the radius of curvature of the image side of the third lens at the optical axis, R13 is the radius of curvature of the object side of the seventh lens at the optical axis, and R14 is the radius of curvature of the image side of the seventh lens at the optical axis.

[0050] The optical lens satisfies the relationship 9≤R1 / R2≤30. By reasonably matching the ratio between the curvature radii of the object-side and image-side surfaces of the first lens, the surface shape difference of the first lens is set reasonably, which is beneficial to controlling the shape of the first lens, correcting its own aberrations, and improving image quality. In addition, it also facilitates the forming of the first lens and reduces the manufacturing difficulty.

[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 rays after being refracted by the first and second lenses can be effectively collected and compressed, so that the light rays can smoothly transition into 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. By appropriately setting the difference in curvature radii between the object-side and image-side surfaces of the seventh lens, aberrations caused by the front lens can be corrected, thus improving the image quality of the optical lens. Furthermore, it allows for better control over the surface shape of the seventh lens, reducing its manufacturing complexity.

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

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

[0055] Wherein, SD1 is the maximum effective half-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 half-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 optical axis direction, and CT7 is the thickness of the seventh lens on the optical axis.

[0056] The optical lens meets the relationship 34mm≤TTL*IMGH / F≤37mm, which enables the optical lens to meet the requirements of a large target surface while adapting to a large 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 half-aperture of the object side of the first lens, it is possible to achieve wide-angle imaging while also enabling the optical lens to have a large image plane and high pixel imaging quality.

[0058] The optical lens satisfies the relationship 0.3≤SAGS13 / CT7≤0.42, which allows for reasonable control of the surface shape and thickness of the seventh lens, thereby controlling the overall thickness of the seventh lens along the optical axis and making the seventh lens thinner and lighter.

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

[0060] Thirdly, this application discloses a terminal device, including a device body and an image-capturing module as described in the second aspect above, wherein the image-capturing module is disposed on the device body.

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

[0062] In the optical lens provided in this application, to meet the requirements of miniaturization, a large field of view, and low distortion, the first lens has negative refractive power. The object-side and image-side surfaces of the first lens are convex and concave near the optical axis, respectively, making the first lens a concave-convex lens. This effectively collects incident light rays with a large field of view, allowing more light to enter the optical lens and thus giving it a large field of view. The second lens also has negative refractive power, with its object-side and image-side surfaces being concave and convex near the optical axis, respectively. This facilitates the smooth entry of light into the optical lens, thereby correcting optical lens distortion and reducing aberrations, improving image quality. The third lens has positive refractive power, and its object-side and image-side surfaces are convex and concave near the optical axis, respectively. This helps correct field curvature of the optical lens and collects and compresses light, allowing it to smoothly transition into the rear lens. The fourth lens has positive refractive power, and its object-side and image-side surfaces are convex near the optical axis. This helps correct aberrations in the optical lens and reduces the angle of incidence of light after passing through the aperture, allowing more light to enter the optical lens. The fifth lens has positive refractive power, and its object-side and image-side surfaces are convex near the optical axis. Combined with the third lens's negative refractive power and concave object-side and image-side surfaces, this helps eliminate chromatic aberration and correct astigmatism, improving the image quality of the optical lens. The seventh lens has positive refractive power, and its object-side and image-side surfaces are convex and concave near the optical axis, respectively. This allows for light convergence, reducing the overall length of the optical lens and further enabling miniaturization.

[0063] The optical lens satisfies the relationship 130deg≤FOV≤140deg, thus giving it a large field of view and enabling wide-angle imaging.

[0064] Furthermore, satisfying the relation 7.1≤TTL / IMGH≤7.9, it is possible to achieve large image plane imaging while taking into account the miniaturization design of optical lenses, which is conducive to improving the image sharpness of optical lenses and thus improving the image quality of optical lenses. Attached Figure Description

[0065] To more clearly illustrate the technical solutions in the embodiments of the present invention, the accompanying drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

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

[0067] Figure 2 These are the spherical aberration diagram, astigmatism curve diagram, and distortion curve diagram of the optical lens disclosed in the first embodiment of this application;

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

[0069] Figure 4 These are the spherical aberration diagram, astigmatism curve diagram, and distortion curve diagram of the optical lens disclosed in the second embodiment of this application;

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

[0071] Figure 6 These are the spherical aberration diagram, astigmatism curve diagram, and distortion curve diagram of the optical lens disclosed in the third embodiment of this application;

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

[0073] Figure 8 These are the spherical aberration diagram, astigmatism curve diagram, and distortion curve diagram of the optical lens disclosed in the fourth embodiment of this application;

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

[0075] Figure 10 These are the spherical aberration diagram, astigmatism curve diagram, and distortion curve diagram of the optical lens disclosed in the fifth embodiment of this application;

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

[0077] Figure 12 This is a schematic diagram of the terminal device disclosed in this application applied to an automobile. Detailed Implementation

[0078] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0079] In this invention, the terms "inner," "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. These terms are primarily for the purpose of better describing the invention and its embodiments, and are not intended to limit the indicated device, element, or component to having a specific orientation, or to be constructed and operated in a specific orientation.

[0080] Furthermore, in addition to indicating direction or positional relationship, some of the aforementioned terms may also have other meanings. For example, the term "above" may also be used in certain situations to indicate a dependency or connection. Those skilled in the art can understand the specific meaning of these terms in this invention based on the specific circumstances.

[0081] Furthermore, the terms "set" and "located in" should be interpreted broadly. Those skilled in the art can understand the specific meaning of these terms in this invention based on the specific circumstances.

[0082] Furthermore, the terms "first," "second," etc., are primarily used to distinguish different devices, elements, or components (which may be the same or different in specific type and construction), and are not intended to indicate or imply the relative importance or quantity of the indicated devices, elements, or components. Unless otherwise stated, "a plurality of" means two or more.

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

[0084] Please see Figure 1 This application discloses an optical lens 100, which includes a first lens L1, a second lens L2, a third lens L3, a fourth lens L4, a fifth lens L5, a sixth lens L6, and a seventh lens L7 arranged sequentially along the optical axis from the object side to the image side. During imaging, light rays enter the first lens L1, the second lens L2, the third lens L3, the fourth lens L4, the fifth lens L5, the sixth lens L6, and the seventh lens L7 sequentially from the object side of the first lens L1, and are finally imaged on the imaging plane 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 convex near the optical axis, and the image-side surface S2 of the first lens L1 is concave near the optical axis. The object-side surface S3 of the second lens L2 is concave near the optical axis, and the image-side surface S4 of the second lens L2 is convex near the optical axis. The object-side surface S5 of the third lens L3 is convex near the optical axis, and the image-side surface S6 of the third lens L3 is convex near the optical axis. The object-side surface S7 of the fourth lens L4 is convex near the optical axis, and the image-side surface S8 of the fourth lens L4 is convex near the optical axis. The object-side surface S9 and the image-side surface S10 of the fifth lens L5 may both be convex near the optical axis. The object-side surface S11 and the image-side surface S12 of the sixth lens L6 may both be concave near the optical axis. The object-side surface S13 of the seventh lens L7 is convex near the optical axis, and the image-side surface S14 of the seventh lens is concave near the optical axis.

[0087] Optionally, all seven lenses can be made of plastic, making the optical lens 100 lighter and easier to process for complex shapes. Alternatively, all seven lenses can be made of glass, or a design can be used where some lenses are plastic and some are glass.

[0088] Optionally, the first lens L1 through the seventh lens L7 can all be spherical lenses, or they can all be aspherical lenses. Alternatively, they can be partially spherical and partially 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 can all be spherical lenses, while the seventh lens L7 can be an aspherical lens. In this way, the combination of spherical and aspherical lenses can improve higher-order aberrations and thus enhance image quality.

[0089] In some embodiments, the optical lens 100 may further include an aperture stop STO, which is disposed between the third lens L3 and the fourth lens L4. The use of a centrally located aperture stop STO is beneficial for aberration correction of the optical lens 100. Of course, as other examples, the aperture stop STO may also be disposed between other lenses, such as between the second lens L2 and the third lens L3, or between the first lens L1 and the second lens L2. The specific placement can be determined according to actual needs, and this embodiment does not impose specific limitations on this.

[0090] In some embodiments, the optical lens 100 further includes an infrared 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 infrared cut-off filter IR can be selected to filter out light of other wavelengths, such as infrared light, while allowing only visible light to pass through, making the image more consistent with the visual experience of the human eye. Of course, the infrared bandpass filter IR can also be selected to filter out light of other wavelengths, such as visible light, while allowing only infrared light to pass through. By filtering out light of other wavelengths, such as visible light, the image quality is improved; and the optical lens 100 can be used as an infrared optical lens, that is, the optical lens 100 can also image and obtain better image effects in dim environments and other special application scenarios. Preferably, the filter IR can be made of glass. Of course, in other embodiments, the filter IR can also be made of optical glass with a coating, or a filter IR of other materials, which can be selected according to actual needs. This embodiment does not make specific limitations.

[0091] In some embodiments, the optical lens 100 also includes a protective glass CG disposed between the filter IR and the imaging surface IMG, so that it can be close to the image sensor during subsequent assembly and 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 this relationship, it can have a large field of view, thereby enabling 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. This gives the optical lens 100 a large aperture, increasing the amount of light entering the lens and making it suitable for use in low-light conditions (such as rainy days), thus meeting the imaging requirements in dark environments.

[0094] In some embodiments, the optical lens 100 satisfies the relationship 7.5 ≤ TTL / F ≤ 8.5. Here, TTL is the distance along the optical axis from the object-side surface S1 of the first lens L1 to the imaging surface of the optical lens 100, and F is the focal length of the optical lens 100. When the optical lens 100 satisfies this relationship, it achieves both miniaturization and 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 the image height corresponding to the maximum field of view of the optical lens 100. Satisfying this relationship allows the optical lens 100 to simultaneously meet the requirements of a large target surface while also enabling it to be adapted to a large imaging surface and to be miniaturized.

[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. Satisfying this relationship allows for reasonable control of the radius of curvature and focal length of the seventh lens L7, thereby helping to reduce optical sensitivity, facilitate aberration correction, and improve 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 half-aperture of the object-side surface S1 of the first lens L1. Satisfying this relationship allows for reasonable control of the maximum effective half-aperture of the object-side surface S1 of the first lens L1. This control of the aperture of the object-side surface S1 of the first lens L1, while achieving a large field of view, also accommodates 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, where SAGS1 is the distance along the optical axis from the maximum effective half-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 (i.e., the sagitta of the object-side surface S1 of the first lens L1), and CT1 is the thickness of the first lens L1 along the optical axis. This allows for reasonable control of the surface shape and thickness of the first lens L1, thereby controlling the overall thickness of the first lens L1 along the optical axis and 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 radius of curvature of the object side surface S1 of the first lens L1, the object side surface S1 of the first lens L1 is made smoother, which is beneficial to realizing 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. Therefore, 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 resolving power of the optical lens 100 and reducing tolerance sensitivity, which helps to improve the imaging quality of the optical lens 100.

[0101] In some embodiments, the optical lens 100 satisfies the relationship -2 ≤ F1 / F ≤ -1.5, where F1 is the focal length of the first lens L1. Satisfying this relationship allows for a reasonable allocation of the focal length of the first lens L1, enabling it to provide negative refractive power. This reasonable distribution of refractive power in the first lens L1 facilitates light convergence and helps reduce the overall spherical aberration, chromatic aberration, and distortion of the first lens L1 to a reasonable level, reducing the design difficulty of subsequent lenses. It also improves the overall resolving power of the optical lens 100 and enhances its peripheral aberration correction. Furthermore, it facilitates the compression of the first lens L1's size, thereby contributing to the formation of a smaller 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, which can reduce the angle of light rays incident from the first lens L1, and at the same time help to improve the overall resolving power of the optical lens 100 and enhance the peripheral aberration correction of the optical lens 100.

[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. Satisfying this relationship allows for a reasonable allocation of the focal length of the third lens L3, enabling it to provide positive refractive power to the optical lens 100. This, in turn, provides better light-gathering capability to the optical lens 100, while simultaneously correcting distortion and reducing aberrations, 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. Satisfying this relationship allows for a reasonable allocation of the focal length of the fourth lens L4, enabling it to provide positive refractive power to the optical lens 100. This, in turn, provides better light-gathering capability to the optical lens 100, corrects distortion, reduces aberrations, and improves the imaging quality of the optical lens 100.

[0105] In some embodiments, the optical lens 100 satisfies the relation 1.5 ≤ F5 / F ≤ 3.6, where F5 is the focal length of the fifth lens L5. When this relation 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, improving the imaging quality of the optical lens 100.

[0106] In some embodiments, the optical lens 100 satisfies the relation -1.8 ≤ F6 / F ≤ -1.1, where F6 is the focal length of the sixth lens L6. When this relation 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, improving the imaging quality of the optical lens 100.

[0107] In some embodiments, the optical lens 100 satisfies the relation 1.8 ≤ F7 / F ≤ 2, where F7 is the focal length of the seventh lens L7. Since the seventh lens L7 provides positive refractive power for the optical lens 100 and provides the main light converging ability of the lens group of the optical lens 100, by controlling the ratio of the focal length of the seventh lens L7 to 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 relation, 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. When lower than the lower limit of the relation, 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 relation can further satisfy 4 < F7 / F < 20, so that the focal length of the seventh lens L7 is reasonable, which is beneficial to the miniaturization design of the optical lens 100.

[0108] In some embodiments, the optical lens 100 satisfies the relation -8 ≤ F1 / CT1 ≤ -3, where CT1 is the thickness of the first lens L1 on the optical axis. When this relation 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 along the optical axis. Satisfying this relationship allows for a reasonable configuration of the refractive power and thickness of the second lens L2, thereby effectively controlling the incident angle of light in the optical lens 100, reducing the sensitivity of the optical lens 100, which is beneficial for correcting aberrations generated by the optical lens 100, and ultimately 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 along the optical axis. Satisfying this relationship allows for a reasonable configuration of the refractive power and thickness of the third lens L3, resulting in a smoother light path into the optical lens 100, reducing the sensitivity of the optical lens 100, which is beneficial for correcting aberrations generated by the optical lens 100, and thus 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 along the optical axis. Satisfying this relationship allows for a reasonable configuration of the refractive power and thickness of the fourth lens L4, resulting in a smoother light path into the optical lens 100, reducing the sensitivity of the optical lens 100, which helps correct aberrations generated by the optical lens 100, and ultimately improves 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 along the optical axis. Satisfying this relationship allows for a reasonable configuration of the refractive power and thickness of the fifth lens L5, resulting in a smoother light path into the optical lens 100, reducing the sensitivity of the optical lens 100, which is beneficial for correcting aberrations generated by the optical lens 100, and thus 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 along the optical axis. Satisfying this relationship allows for a reasonable configuration of the refractive power and thickness of the sixth lens L6, resulting in a smoother light path into the optical lens 100, reducing the sensitivity of the optical lens 100, which is beneficial for correcting aberrations generated by the optical lens 100, and thus 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 along the optical axis. Satisfying this relationship allows for a reasonable configuration of the refractive power and thickness of the seventh lens L7, resulting in a smoother light path into the optical lens 100, reducing the sensitivity of the optical lens 100, which is beneficial for correcting aberrations generated by the optical lens 100, and thus 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. Here, 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 this 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, which is beneficial to 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. Here, Vd5 is the Abbe number of the fifth lens L5, and Vd6 is the Abbe number of the sixth lens L6. When this relationship is satisfied, by reasonably setting the ratio of the difference in Abbe numbers between 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 colors 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, by controlling the sum of the thicknesses of the fifth lens L5 and the sixth lens L6, the thickness of the cemented lens after the combination of the fifth lens L5 and the sixth lens L6 can be reasonably controlled, enabling the optical lens 100 to achieve a miniaturized design.

[0118] In some embodiments, the optical lens 100 satisfies the relationship 2.1 ≤ SD1 / SD14 ≤ 3.5. Here, SD1 is the maximum effective half-aperture of the object-side surface S1 of the first lens L1, and SD14 is the maximum effective half-aperture of the image-side surface S14 of the seventh lens L7. Satisfying this relationship allows the optical lens 100 to achieve wide-angle imaging while also having a large image plane, thus enabling it to meet the imaging requirements of large target surfaces.

[0119] In some embodiments, the optical lens 100 satisfies the relationship 1 ≤ SD6 / SD7 ≤ 1.65. Here, SD6 is the maximum effective half-aperture of the image-side surface S6 of the third lens L3, and SD7 is the maximum effective half-aperture of the object-side surface S7 of the fourth lens L4. Since the aperture stop of the optical lens 100 of this application is located between the third lens L3 and the fourth lens L4, by limiting the maximum effective half-aperture of the image-side surface S6 of the third lens L3 and the maximum effective half-aperture of the object-side surface S7 of the fourth lens L4, the difference between their maximum effective half-apertures can be minimized, reducing the aperture step difference between them. This allows light to transition more smoothly and effectively 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 this relationship is satisfied, the maximum effective half-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 through 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. Satisfying this relationship helps control the curvature radii of the object-side surface S1 and image-side surface of the first lens L1, preventing excessive curvature of these surfaces and thus facilitating control over the shape of the first lens L1. Simultaneously, it can correct aberrations generated by the lens itself, improving image quality.

[0122] In some embodiments, the optical lens 100 satisfies the relationship |≤R11 / R12|≤80, where R12 is the radius of curvature of the image-side surface S12 of the sixth lens L6 near the optical axis, and R11 is the radius of curvature of the object-side surface S11 of the sixth lens L6 near the optical axis. Satisfying this relationship allows for reasonable control of the radii of curvature of the object-side surface S11 and the image-side surface of the sixth lens L6, preventing excessive curvature and thus facilitating control over 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, appropriately setting the difference in the radii of curvature between the object-side and image-side surfaces of the third lens L3 can effectively collect and compress the incident light rays refracted by the first lens L1 and the second lens L2, allowing the light rays to smoothly transition into the rear lens, reducing aberrations, and improving 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, where 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 this relationship, the difference between the radii of curvature of the object-side and image-side surfaces of the seventh lens L7 can be reasonably set, which can correct the aberrations generated by the front lens and improve the imaging quality of the optical lens. In addition, the surface shape of the seventh lens L7 can be reasonably controlled, reducing 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 this relationship, it can simultaneously meet the requirements of a large target surface while satisfying the needs of adapting the optical lens 100 to a large imaging surface and miniaturizing the optical lens.

[0126] In some embodiments, the optical lens 100 satisfies the relationship 1.4≤SD1 / IMGH≤1.9. By reasonably controlling the maximum effective half-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 plane and high pixel imaging quality.

[0127] In some embodiments, the optical lens 100 satisfies the relationship 0.3 ≤ SAGS13 / CT7 ≤ 0.42, where SAGS13 is the distance along the optical axis from the maximum effective half-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 (i.e., the sagitta of the seventh lens L7). When the optical lens 100 satisfies this relationship, the surface shape and thickness of the seventh lens L7 can be reasonably controlled, thereby controlling the overall thickness of the seventh lens L7 along 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 this relationship is satisfied, by reasonably controlling the relationship between the field of view and the aperture number of the optical lens 100, a reasonable field of view and aperture number can be provided for the optical lens 100, which can take into account both 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 angle of view and a large aperture, thus 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 this application is shown below. Figure 1 As shown, the optical lens 100 includes a first lens L1, a second lens L2, a third lens L3, an aperture stop 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, arranged sequentially along the optical axis from the object side to the image side.

[0132] Taking an optical lens 100 with a focal length F = 4.058 mm, an aperture FNO = 1.6, and a maximum field of view (FOV) of 140 degrees as an example, other parameters of the optical lens 100 are given in Table 1 below. The elements along the optical axis of the optical lens 100, from the object side to the image side, are arranged sequentially according to the order of the elements in Table 1 from top to bottom. In the same lens, the surface with the smaller surface number is the object side of the lens, and the surface with the larger surface number is the image side of the lens. For example, surface numbers 1 and 2 correspond to the object side S1 and image side S2 of the first lens L1, respectively. The Y-radius in Table 1 is the radius of curvature of the corresponding object side or image side at the optical axis. The first value in the "thickness" parameter column of the lens is the thickness of the lens along the optical axis, and the second value is the distance from the image side of the lens to the next surface along the optical axis. The value of the stop STO in the "Thickness" parameter column represents the distance on the optical axis from the stop STO to the vertex of the next surface (the vertex refers to the intersection of the surface and the optical axis). By default, the direction from the object side of the first lens L1 to the image side of the last lens is the positive direction of the optical axis. When this value is negative, it indicates that the stop STO is set on the image side of the next surface vertex. If the stop STO thickness is positive, the stop STO is on the object side of the next surface vertex. It is understood that the units for the Y-radius, thickness, and focal length in Table 1 are all mm. Furthermore, the refractive index, Abbe number, etc., in Table 1 are obtained at a reference wavelength of 587.6 nm, and the focal length is obtained at a reference wavelength of 546 nm.

[0133] In the first embodiment, both the object-side surface and the image-side surface of the seventh lens L7 are aspherical. Therefore, the surface shape x of each aspherical lens can be defined using, but is not limited to, the following aspherical formula:

[0134]

[0135] Where x is the distance vector from the vertex of the aspherical surface at a height h along the optical axis; c is the curvature of the aspherical surface at the optical axis, c = 1 / Y (i.e., the paraxial curvature c is the reciprocal of the radius of curvature Y in Table 1 above); K is the conic coefficient; Ai is the i-th order correction coefficient of the aspherical surface. Table 2 below gives the higher-order coefficients A4, A6, A8, A10, A12, A14, and A16 of the aspherical surface of the seventh lens L7.

[0136] Table 1

[0137]

[0138] Table 2

[0139]

[0140]

[0141] Please see Figure 2 (A) in the middle Figure 2 Figure (A) shows the spherical aberration curves of the optical lens 100 in the first embodiment at wavelengths of 656 nm, 588 nm, 546 nm, 486 nm, and 436 nm. The horizontal axis along the X-axis represents the focus shift in mm, and the vertical axis along the Y-axis represents the normalized field of view. Figure 2 As can be seen from (A) in the first embodiment, the spherical aberration value of the optical lens 100 is better, indicating that the imaging quality of the optical lens 100 in this embodiment is better.

[0142] Please see Figure 2 (B) in the middle Figure 2 (B) in the figure shows the light astigmatism diagram of the optical lens 100 in the first embodiment at a wavelength of 546 nm. The horizontal axis along the X-axis represents the focus shift in mm, and the vertical axis along the Y-axis represents the field of view in degrees. In the astigmatism curve diagram, T represents the curvature of the imaging plane IMG in the meridional direction, and S represents the curvature of the imaging plane 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, and the field curvature and astigmatism of each field of view are well corrected. The center and edge of the field of view have clear imaging, that is, the astigmatism of the optical lens 100 is well compensated.

[0143] Please see Figure 2 (C) in the middle, Figure 2 (C) in the figure 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 represents distortion, and the vertical axis along the Y-axis represents the field of view, in degrees (deg). Figure 2 As can be seen from (C), at this wavelength, the image distortion caused by the main beam is small, and the distortion of the optical lens 100 is well corrected.

[0144] Second Embodiment

[0145] The structural schematic diagram of the optical lens 100 disclosed in the second embodiment of this application is shown below. Figure 3As shown, the optical lens 100 includes a first lens L1, a second lens L2, a third lens L3, an aperture stop 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, arranged sequentially along the optical axis from the object side to the image side.

[0146] Other parameters of the optical lens 100 are given in Table 3 below. The definitions of each parameter can be derived from the description of the foregoing embodiments, and will not be repeated here.

[0147] Table 3

[0148]

[0149]

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

[0151] Table 4

[0152]

[0153] Please see Figure 4 ,from Figure 4 As can be seen from (A) the spherical aberration curve, (B) the ray astigmatism curve, and (C) the distortion curve, the spherical aberration, astigmatism, and distortion of the optical lens 100 are all well controlled, thus the optical lens 100 of this embodiment has good imaging quality. Furthermore, regarding... Figure 4 (A) Figure 4 (B) and Figure 4 The wavelengths corresponding to the curves in (C) can be referred to in the first embodiment regarding... Figure 2 (A) Figure 2 (B) Figure 2 The content 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 this application is shown below. Figure 5 As shown, the optical lens 100 includes a first lens L1, a second lens L2, a third lens L3, an aperture stop 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, arranged sequentially along the optical axis from the object side to the image side.

[0156] Other parameters of the optical lens 100 are given in Table 5 below. The definitions of each parameter can be derived from the description of the foregoing embodiments, and will not be repeated here.

[0157] Table 5

[0158]

[0159]

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

[0161] Table 6

[0162]

[0163] Please see Figure 6 ,Depend on Figure 6 As can be seen from (A) the spherical aberration curve, (B) the ray astigmatism curve, and (C) the distortion curve, the spherical aberration, astigmatism, and distortion of the optical lens 100 are all well controlled, thus the optical lens 100 of this embodiment has good imaging quality. Furthermore, regarding... Figure 6 (A) Figure 6 (B) and Figure 6 The wavelengths corresponding to the curves in (C) can be referred to in the first embodiment regarding... Figure 2 (A) Figure 2 (B) Figure 2 The content 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 this application is shown below. Figure 7 As shown, the optical lens 100 includes a first lens L1, a second lens L2, a third lens L3, an aperture stop 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, arranged sequentially along the optical axis from the object side to the image side.

[0166] Other parameters of the optical lens 100 are given in Table 7 below. The definitions of each parameter can be derived from the description of the foregoing embodiments, and will not be repeated here.

[0167] Table 7

[0168]

[0169]

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

[0171] Table 8

[0172]

[0173] Please see Figure 8 ,Depend on Figure 8 As can be seen from (A) the spherical aberration curve, (B) the ray astigmatism curve, and (C) the distortion curve, the spherical aberration, astigmatism, and distortion of the optical lens 100 are all well controlled, thus the optical lens 100 of this embodiment has good imaging quality. Furthermore, regarding... Figure 8 (A) Figure 8 (B) and Figure 8 The wavelengths corresponding to the curves in (C) can be referred to in the first embodiment regarding... Figure 2 (A) Figure 2 (B) Figure 2 The content described in (C) will not be repeated here.

[0174] Fifth embodiment

[0175] Please see Figure 9 The optical lens 100 includes a first lens L1, a second lens L2, a third lens L3, an aperture stop 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, arranged sequentially along the optical axis from the object side to the image side.

[0176] The structural schematic diagram of the optical lens 100 disclosed in the fifth embodiment of this application is shown below. Figure 9 As shown, other parameters of the optical lens 100 are given in Table 9 below. The definitions of each parameter can be derived from the description of the foregoing embodiments, and will not be repeated here.

[0177] Table 9

[0178]

[0179]

[0180] In the fifth embodiment, Table 10 provides the higher-order coefficients that can be used for various aspherical mirrors in the fifth embodiment, wherein each aspherical surface shape can be defined by the formula given in the first embodiment.

[0181] Table 10

[0182]

[0183] Please see Figure 10 ,Depend on Figure 10As can be seen from (A) the spherical aberration curve, (B) the ray astigmatism curve, and (C) the distortion curve, the spherical aberration, astigmatism, and distortion of the optical lens 100 are all well controlled, thus the optical lens 100 of this embodiment has good imaging quality. Furthermore, regarding... Figure 10 (A) Figure 10 (B) and Figure 10 The wavelengths corresponding to the curves in (C) can be referred to in the first embodiment regarding... Figure 2 (A) Figure 2 (B) Figure 2 The content described in (C) will not be repeated here.

[0184] Please refer to Table 11, which summarizes the ratios of the various relationships in the first to fifth embodiments of this application.

[0185] Table 11

[0186]

[0187]

[0188] Please see Figure 11 This application also discloses an image-capturing module 200, which includes an image sensor 201 and an optical lens 100 as described in any of the first to fifth embodiments above. The image sensor 201 is disposed 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 light rays from an object passing through the lens and incident on the photosensitive surface can be converted into electrical signals for an image. The image sensor 201 can be a complementary metal-oxide semiconductor (CMOS) or a charge-coupled device (CCD). The image-capturing module 200 can be an imaging module integrated on a terminal device 300 or a stand-alone lens. It is understood that the image-capturing module 200 with the aforementioned optical lens 100 has all the technical effects of the aforementioned optical lens 100, that is, the image-capturing module 200 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 embodiments of optical lens 100, they will not be repeated here.

[0189] This application also discloses a terminal device 300, which includes a device body 301 and the aforementioned image-capturing module 200, with the image-capturing module 200 disposed on the device body 301. The terminal device 300 may include, but is not limited to, mobile phones, tablets, laptops, smartwatches, in-vehicle devices, drones, and surveillance cameras. Please refer to [link / reference]. Figure 12 If the terminal device 300 can be applied to a vehicle, then the main body 301 of the device can be the vehicle body, and the imaging module 200 can be installed on the vehicle body, for example, inside or outside the vehicle body.

[0190] It is understood that the terminal device 300 with the aforementioned image-capturing module 200 also possesses all the technical effects of the aforementioned 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 aforementioned technical effects have been described in detail in the embodiments of the optical lens 100, they will not be repeated here.

[0191] The optical lens, image acquisition module, and terminal device disclosed in the embodiments of this application have been described in detail above. Specific examples have been used to illustrate the principles and implementation methods of this application. The description of the above embodiments is only for the purpose of helping to understand the optical lens, image acquisition module, and terminal device of this application and their core ideas. At the same time, for those skilled in the art, there will be changes in the specific implementation methods and application scope based on the ideas of this application. Therefore, the content of this specification should not be construed as a limitation of this application.

Claims

1. An optical lens, characterized in that, There are a total of seven lenses with refractive power, including a first lens, a second lens, a third lens, a fourth lens, a fifth lens, a sixth lens, and a seventh lens arranged sequentially along the optical axis from the object side to the image side; The first lens has negative refractive power, the object side of the first lens is convex near the optical axis, and the image side of the first lens is concave near the optical axis. The second lens has negative refractive power, the object side of the second lens is concave near the optical axis, and the image side of the second lens is convex near the optical axis; The third lens has positive refractive power, the object side of the third lens is convex near the optical axis, and the image side of the third lens is concave near the optical axis. The fourth lens has positive refractive power, and both the object-side and image-side surfaces of the fourth lens are convex near the optical axis; the fifth lens has positive refractive power, and both the object-side and image-side surfaces of the fifth lens are convex near the optical axis; the sixth lens has negative refractive power, and both the object-side and image-side surfaces of the sixth lens are concave near the optical axis. The seventh lens has positive refractive power, the object side of the seventh lens is convex near the optical axis, and the image side of the seventh lens is concave near the optical axis. The optical lens satisfies the following relationships: 130deg≤FOV≤140deg, 7.1≤TTL / IMGH≤7.9, and 1.4≤SD1 / IMGH≤1.9; Wherein, FOV is the maximum field of view of the optical lens, TTL is the distance on the optical axis from the object side of the first lens to the imaging surface of the optical lens, IMGH is half the image height corresponding to the maximum field of view of the optical lens, and SD1 is the maximum effective half-aperture of the object side of the first lens.

2. The optical lens according to claim 1, characterized in that, The optical lens satisfies the following relationships: 0.92≤F / IMGH≤0.98, and / or, 1.4≤F7 / R13≤1.8, and / or 1.7≤FNO≤1.9; Wherein, 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 relationships: 0.18≤SD1 / TTL≤0.24, and / or, 10≤R1 / F≤35, and / or, 3.5≤CT1 / SAGS1≤6.5; Wherein, SD1 is the maximum effective half-aperture of the object side of the first lens, R1 is the radius of curvature of the object side 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 in the optical axis direction from the maximum effective half-aperture of the object side of the first lens to the intersection of the object side of the first lens and 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; Wherein, 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 on the optical axis from the image side of the sixth lens to the object side of the seventh lens, 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 and sixth lenses, 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; Wherein, SD1 is the maximum effective half-aperture of the object side of the first lens, SD14 is the maximum effective half-aperture of the image side of the seventh lens, SD6 is the maximum effective half-aperture of the image side of the third lens, and SD7 is the maximum effective half-aperture of the object side 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; Wherein, R1 is the radius of curvature of the object side of the first lens at the optical axis, R2 is the radius of curvature of the image side of the first lens at the optical axis, R5 is the radius of curvature of the object side of the third lens at the optical axis, R6 is the radius of curvature of the image side of the third lens at the optical axis, R13 is the radius of curvature of the object side of the seventh lens at the optical axis, and R14 is the radius of curvature of the image side 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, 0.3≤SAGS13 / CT7≤0.42; Where F is the focal length of the optical lens, SAGS13 is the distance along the optical axis from the maximum effective half-aperture of the object side of the seventh lens to the intersection of the object side of the seventh lens and the optical axis, and CT7 is the thickness of the seventh lens along the optical axis.

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

10. A terminal device, characterized in that, It includes a device body and an image acquisition module as described in claim 9, wherein the image acquisition module is disposed on the device body.

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