Optical lens, camera module and electronic device

Abstract

The invention discloses an optical lens, a camera module and an electronic device, and the optical lens comprises six lens elements with refractive power, and the six lens elements sequentially comprise the first lens element with negative refractive power, the second lens element with negative refractive power, the third lens element with negative refractive power, the fourth lens element with negative refractive power and the fifth lens element with negative refractive power from the object side to the image side along the optical axis, a second lens element with negative refractive power having a convex object-side surface and a concave image-side surface in a paraxial region, respectively; the third lens element with positive refractive power has an object-side surface and an image-side surface being convex in a paraxial region. The fourth lens element with positive refractive power has an object-side surface and an image-side surface being convex in a paraxial region. The fifth lens element with negative refractive power has an object-side surface and an image-side surface being concave in a paraxial region. The sixth lens element with positive refractive power has an object-side surface and an image-side surface being convex in a paraxial region. The optical lens satisfies the following relational expressions: 200 DEG < = FOV < = 210 DEG, and 1.3 DEG < = FNO < = 1.45. The optical lens can meet the requirements of large field angle, high light incoming amount and miniaturization.

Description

Technical Field

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

[0002] With the rapid development of drone technology and the continued expansion of its application areas, users are increasingly demanding the imaging quality of drone optical lenses. Optical imaging quality with a wide field of view, high light intake, and high pixel count has become a core performance metric for drones. However, due to the size and weight constraints of drones, it's difficult for optical lenses to achieve an ideal balance between image quality and lightweight construction. Summary of the Invention

[0003] In view of the above, it is necessary to propose an optical lens, a camera module and an electronic device that can take into account the requirements of a large field of view, a high amount of light input and miniaturization.

[0004] The first aspect of the embodiment of the present application provides an optical lens, which has a total of six lenses with refractive power, which include, in order from the object side to the image side along the optical axis: a first lens having negative refractive power, whose object side surface is convex at the near optical axis, and whose image side surface is concave at the near optical axis; a second lens having negative refractive power, whose object side surface is convex at the near optical axis, and whose image side surface is concave at the near optical axis; a third lens having positive refractive power, whose object side surface is convex at the near optical axis, and whose image side surface is convex at the near optical axis; a fourth lens having positive refractive power, whose object side surface is convex at the near optical axis, and whose image side surface is convex at the near optical axis; The side surface is convex at the near optical axis, and the image side surface is convex at the near optical axis; the fifth lens has negative refractive power, the object side surface is concave at the near optical axis, and the image side surface is concave at the near optical axis; the sixth lens has positive refractive power, the object side surface is convex at the near optical axis, and the image side surface is convex at the near optical axis; the optical lens satisfies the following relationship: 200°≤FOV≤210°, 1.3≤FNO≤1.45; wherein FOV is the maximum field of view of the optical lens, and FNO is the aperture number of the optical lens.

[0005] The above-mentioned optical lens, by setting the first lens to have negative refractive power, its object side surface and image side surface are convex and concave at the near optical axis respectively, which is beneficial to coupling as much large field of view light as possible into the optical lens and improving the relative illumination of the edge field of view; the second lens has negative refractive power, its object side surface and image side surface are convex and concave at the near optical axis respectively, which further slows down the entry of light into the optical lens, and at the same time makes the light move toward the imaging surface of the optical lens, ensuring a better transition between the light emitted from the first lens and the light incident on the second lens, reducing the sensitivity of the optical lens and improving the assembly yield of the optical lens; the third lens has positive refractive power, its object side surface and image side surface are convex at the near optical axis, and is matched with the second lens with negative refractive power, so that the light moves toward the imaging surface of the optical lens, and at the same time effectively controls the chromatic aberration of the optical lens, reduces the risk of color cast of the optical lens, and is beneficial The fourth lens has positive refractive power, and its object-side and image-side surfaces are both convex near the optical axis. The fifth lens has negative refractive power, and its object-side and image-side surfaces are both concave near the optical axis. The fourth lens and the fifth lens further control the chromatic aberration of the optical lens, converge the light emitted from the third lens, and make the light transition smoothly. At the same time, they can correct various aberrations introduced by the front optical lens, reduce the loss of light in each field of view, and improve the relative illumination of each field of view, thereby improving the imaging quality of the optical lens. The sixth lens has positive refractive power, and its object-side and image-side surfaces are both convex near the optical axis. This can effectively suppress the angle of incidence of the edge field of view on the imaging surface of the optical lens, allowing more light to effectively enter the imaging surface of the optical lens. At the same time, it can balance various aberrations of the optical lens and improve the imaging quality of the optical lens. By rationally configuring the refractive power and surface shape of each lens, the optical lens has a compact structure. The optical lens meets the requirements of miniaturization while maintaining good imaging quality.

[0006] Furthermore, by ensuring that the optical lens satisfies 200°≤FOV≤210°, the optical lens can have a larger field of view, meeting the requirements of a large field of view. The optical lens has a wider field of view, thereby expanding the shooting range of the optical lens and obtaining image information within a wider field of view. By ensuring that the optical lens satisfies 1.3≤FNO≤1.45, the optical lens can be guaranteed to have a large aperture characteristic, allowing the optical lens to have a high light intake, making the captured image clearer.

[0007] A second aspect of an embodiment of the present application provides a camera module, comprising: the optical lens as described above; and an image sensor, disposed on the image side of the optical lens.

[0008] The above-mentioned camera module includes the above-mentioned optical lens, which can take into account the requirements of large field of view, high light input and miniaturization.

[0009] A third aspect of an embodiment of the present application provides an electronic device, comprising: a housing; and the above-mentioned camera module, wherein the camera module is mounted on the housing.

[0010] The electronic device includes the optical lens, which can meet the requirements of a large field of view, a high amount of light input, and miniaturization. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 It is a schematic structural diagram of the optical lens disclosed in the first embodiment of this application.

[0012] Figure 2 These are the longitudinal spherical aberration curve, astigmatism curve, and distortion curve of the optical lens disclosed in the first embodiment of the present application.

[0013] Figure 3 It is a schematic structural diagram of the optical lens disclosed in the second embodiment of the present application.

[0014] Figure 4 This is a longitudinal spherical aberration curve diagram, an astigmatism curve diagram, and a distortion curve diagram of the optical lens disclosed in the second embodiment of the present application.

[0015] Figure 5 It is a schematic structural diagram of the optical lens disclosed in the third embodiment of this application.

[0016] Figure 6 3. This is a longitudinal spherical aberration curve diagram, an astigmatism curve diagram, and a distortion curve diagram of the optical lens disclosed in the third embodiment of the present application.

[0017] Figure 7 It is a schematic structural diagram of the optical lens disclosed in the fourth embodiment of the present application.

[0018] Figure 8 4. It is a longitudinal spherical aberration curve diagram, an astigmatism curve diagram and a distortion curve diagram of the optical lens disclosed in the fourth embodiment of the present application.

[0019] Figure 9 It is a schematic structural diagram of the optical lens disclosed in the fifth embodiment of the present application.

[0020] Figure 10 1 and 2. These are the longitudinal spherical aberration curve, astigmatism curve, and distortion curve of the optical lens disclosed in the fifth embodiment of the present application.

[0021] Figure 11 It is a schematic structural diagram of the optical lens disclosed in the sixth embodiment of the present application.

[0022] Figure 12 1 and 2. These are the longitudinal spherical aberration curve, astigmatism curve, and distortion curve of the optical lens disclosed in the sixth embodiment of the present application.

[0023] Figure 13It is a schematic structural diagram of the optical lens disclosed in the seventh embodiment of the present application.

[0024] Figure 14 1 and 2. These are the longitudinal spherical aberration curve, astigmatism curve, and distortion curve of the optical lens disclosed in the seventh embodiment of the present application.

[0025] Figure 15 It is a structural diagram of the camera module of an embodiment of the present application.

[0026] Figure 16 Schematic diagram of the structure of the electronic device according to an embodiment of the present application.

[0027] Description of the main component symbols: optical lens 100, optical axis O, first lens L1, second lens L2, third lens L3, fourth lens L4, fifth lens L5, sixth lens L6, object side surfaces S1, S3, S5, S7, S9, S11, image side surfaces S2, S4, S6, S8, S10, S12, aperture STO, filter IR, imaging surface IMG, camera module 200, image sensor 201, electronic device 300, housing 301. DETAILED DESCRIPTION

[0028] The embodiments of the present application are described in detail below. Examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present application and are not to be construed as limiting the present application.

[0029] See also Figure 1 The present embodiment provides an optical lens 100 having a total of six lenses with refractive power, including, in order from the object side to the image side along the optical axis O, a first lens L1, a second lens L2, a third lens L3, a fourth lens L4, a fifth lens L5, and a sixth lens L6. 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, and the sixth lens L6 in order from the object side of the first lens L1, and are ultimately imaged on the imaging surface IMG of the optical lens 100.

[0030] 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 negative refractive power, and the sixth lens L6 has positive refractive power.

[0031] The object-side surface S1 of the first lens element L1 is convex at the near optical axis O, and the image-side surface S2 of the first lens element L1 is concave at the near optical axis O; the object-side surface S3 of the second lens element L2 is convex at the near optical axis O, and the image-side surface S4 of the second lens element L2 is concave at the near optical axis O; the object-side surface S5 of the third lens element L3 is convex at the near optical axis O, and the image-side surface S6 of the third lens element L3 is convex at the near optical axis O; the object-side surface S7 of the fourth lens element L4 is convex at the near optical axis O, and the image-side surface S8 of the fourth lens element L4 is convex at the near optical axis O; the object-side surface S9 of the fifth lens element L5 is concave at the near optical axis O, and the image-side surface S10 of the fifth lens element L5 is concave at the near optical axis O; the object-side surface S11 of the sixth lens element L6 is convex at the near optical axis O, and the image-side surface S12 of the sixth lens element L6 is convex at the near optical axis O.

[0032] The optical lens 100 is configured such that the first lens L1 has a negative refractive power, and its object-side surface S1 and image-side surface S2 are convex and concave respectively at the near optical axis O, which facilitates coupling as much light of a large field of view as possible into the optical lens 100 and improves the relative illumination of the peripheral field of view; the second lens L2 has a negative refractive power, and its object-side surface S3 and image-side surface S4 are convex and concave respectively at the near optical axis O, further slowing down the light entering the optical lens 100 and causing the light to move toward the imaging surface of the optical lens 100. Ensure that there is a good transition between the light emitted from the first lens L1 and the light incident on the second lens L2, reduce the sensitivity of the optical lens 100, and improve the assembly yield of the optical lens 100; the third lens L3 has a positive refractive power, and its object side surface S5 and image side surface S6 are both convex near the optical axis O. Together with the second lens L2 with a negative refractive power, the light moves toward the imaging surface of the optical lens 100, while effectively controlling the chromatic aberration of the optical lens 100, reducing the risk of color cast of the optical lens 100, and helping to improve The imaging quality of the optical lens 100; the fourth lens L4 has a positive refractive power, and its object side surface S7 and image side surface S8 are both convex at the near optical axis O, and the fifth lens L5 has a negative refractive power, and its object side surface S9 and image side surface S10 are both concave at the near optical axis O. The fourth lens L4 is combined with the fifth lens L5 to further control the chromatic aberration of the optical lens 100, and can converge the light emitted from the third lens L3 and make the light transition smoothly, and at the same time can correct various aberrations brought by the front optical lens 100, and can This can reduce the loss of light in each field of view, improve the relative illumination of each field of view, and thus improve the imaging quality of the optical lens 100; the sixth lens L6 has positive refractive power, and its object-side surface S11 and image-side surface S12 are both convex near the optical axis O. This can effectively suppress the angle of incidence of the edge field of view on the imaging surface IMG of the optical lens 100, allowing more light to effectively enter the imaging surface IMG of the optical lens 100. At the same time, it can balance various aberrations of the optical lens 100 and improve the imaging quality of the optical lens 100. By rationally configuring the refractive power and surface shape of each lens, the optical lens 100 has a compact structure, and the optical lens 100 has good imaging quality while meeting the requirements of miniaturization.

[0033] Furthermore, the optical lens 100 satisfies the following relationship: 200°≤FOV≤210°; for example, the FOV is 200°, 201°, 202°, ​​203°, 204°, 205°, 206°, 207°, 208°, 209°, 210°, etc., where FOV is the maximum field of view of the optical lens 100. Ensuring that the optical lens 100 satisfies the above relationship facilitates a larger field of view, meeting the requirement for a large field of view. The optical lens 100 has a wider field of view, thereby expanding the capture range of the optical lens 100 and acquiring image information within a wider field of view.

[0034] Furthermore, the optical lens 100 satisfies the following relationship: 1.3≤FNO≤1.45; for example, FNO is 1.3, 1.31, 1.32, 1.33, 1.34, 1.35, 1.36, 1.37, 1.38, 1.39, 1.4, 1.41, 1.42, 1.43, 1.44, 1.45, etc., where FNO is the aperture number of the optical lens 100. By ensuring that the optical lens 100 satisfies the above relationship, the optical lens 100 can be ensured to have a large aperture characteristic, allowing the optical lens 100 to have a high amount of light entering, resulting in clearer captured images.

[0035] In some embodiments, when the optical lens 100 is used in electronic devices such as drones, mobile phones, tablet computers, smart watches, and thumb cameras, the first lens L1 can be made of glass, and the second lens L2, third lens L3, fourth lens L4, fifth lens L5, and sixth lens L6 can be made of plastic to reduce the overall weight of the optical lens 100 and minimize the effects of temperature on these lenses. Alternatively, the first lens L1, second lens L2, third lens L3, fourth lens L4, fifth lens L5, and sixth lens L6 can all be made of plastic. Furthermore, it will be appreciated that when the optical lens 100 is used in electronic devices such as vehicle-mounted devices and monitors, the first lens L1, second lens L2, third lens L3, fourth lens L4, fifth lens L5, and sixth lens L6 can all be made of glass. This ensures that the optical lens 100 maintains good imaging quality while minimizing the effects of temperature on these lenses. Of course, among the multiple lenses of the optical lens 100, some lenses can be made of glass and some lenses can be made of plastic, so as to ensure that while reducing the impact of temperature on the lens to achieve better imaging quality, it can also reduce the processing cost of the lens and reduce the weight of the lens, thereby reducing the processing cost of the optical lens 100 and reducing the overall weight of the optical lens 100.

[0036] In some embodiments, considering the simple manufacturing process and low production cost of spherical lenses, and the flexibility in designing the lens surface shape, the imaging resolution capability of the optical lens 100 is enhanced. Aspherical lenses allow for more flexible design of the object-side or image-side surfaces of the lens, effectively resolving undesirable issues such as unclear imaging, distorted visual field, or narrow field of view while maintaining a smaller and thinner lens. Furthermore, the optical lens 100 can achieve good imaging quality without requiring an excessive number of lenses, thereby shortening the length of the optical lens 100. Based on this, the second lens L2, the third lens L3, the fourth lens L4, the fifth lens L5, and the sixth lens L6 can all be aspherical lenses. This aspherical design not only improves the machinability of each lens, facilitating surface design, but also allows for more flexible design of the object-side and image-side surfaces of the lenses. This allows each lens to effectively address issues such as unclear imaging, distorted visual field, or a narrow field of view while maintaining a relatively small and thin size. Furthermore, the optical lens 100 can achieve good imaging quality and high resolution without requiring an excessive number of lenses, which also facilitates shortening the length of the optical lens 100. It will be appreciated that in other embodiments, the surfaces of each lens in the optical lens 100 may all be spherical, all aspherical, or any combination of spherical and aspherical surfaces. The specific selection can be based on actual needs and is not specifically limited in this embodiment.

[0037] In some embodiments, the optical lens 100 further includes an aperture stop STO, which can be an aperture stop and / or a field stop. For example, the aperture stop STO can be an aperture stop, or the aperture stop STO can be a field stop, or the aperture stop STO can be both an aperture stop and a field stop. In this embodiment, the aperture stop STO is disposed between the third lens L3 and the fourth lens L4. The aperture STO divides the optical lens 100 into a front lens group and a rear lens group, which facilitates the rational distribution of the refractive power of the optical lens 100, thereby enabling the optical lens 100 to have both a wide field of view angle and a large aperture. It is understood that in other embodiments, the aperture STO can also be disposed between other lenses, and the configuration can be adjusted according to actual circumstances. This embodiment does not specifically limit this.

[0038] In some embodiments, the optical lens 100 further includes an IR filter, which is disposed between the image-side surface S12 of the sixth lens L6 and the imaging surface IMG of the optical lens 100. Optionally, the IR filter may be an infrared cutoff filter to filter out infrared light and pass visible light, making the imaging more consistent with the visual experience of the human eye, thereby improving the imaging quality. In other embodiments, the IR filter may be an infrared bandpass filter, which can filter out light of other wavelengths, such as visible light, to allow infrared light to pass through and reflect visible light to achieve infrared imaging of the optical lens 100, enabling the optical lens 100 to image in low-light environments or special application scenarios and obtain better imaging quality. It is understandable that the IR filter may be made of plastic, optical glass coating, or other materials for infrared filters, and can be selected according to actual needs and is not specifically limited in this embodiment.

[0039] In some embodiments, the optical lens 100 satisfies the following relationship: 12 ≤ TTL / F ≤ 13.5; for example, TTL / F is 12, 12.1, 12.2, 12.3, 12.4, 12.5, 12.6, 12.7, 12.8, 12.9, 13, 13.1, 13.2, 13.3, 13.4, 13.5, etc., where TTL is the distance from the object-side surface S1 of the first lens L1 to the imaging surface IMG of the optical lens 100 on the optical axis O, and F is the effective focal length of the optical lens 100. By ensuring that the optical lens 100 satisfies the above relationship, the optical lens 100 can be designed to be compact while ensuring high-quality imaging.

[0040] In some embodiments, the optical lens 100 satisfies the following relationship: 1.7≤ImgH / F≤1.9; for example, ImgH / F is 1.7, 1.71, 1.72, 1.73, 1.74, 1.75, 1.76, 1.77, 1.78, 1.79, 1.8, 1.81, 1.82, 1.83, 1.84, 1.85, 1.86, 1.87, 1.88, 1.89, 1.9, etc., where ImgH is half of the image height corresponding to the maximum field of view of the optical lens 100. Ensuring that the optical lens 100 satisfies the above relationship facilitates achieving high-resolution imaging quality and enabling the optical lens 100 to capture images within a larger field of view.

[0041] In some embodiments, the optical lens 100 satisfies the following relationship: 142°≤FOV / FNO≤158°; for example, FOV / FNO is 142°, 143°, 144°, 145°, 146°, 147°, 148°, 149°, 150°, 151°, 152°, 153°, 154°, 155°, 156°, 157°, 158°, etc. By ensuring that the optical lens 100 satisfies the above relationship, the optical lens 100 has the characteristics of both a large field of view and a large aperture.

[0042] In some embodiments, the optical lens 100 satisfies the following relationship: -7 ≤ F1 / F ≤ -5; for example, F1 / F is -7, -6.9, -6.8, -6.7, -6.6, -6.5, -6.4, -6.3, -6.2, -6.1, -6, -5.9, -5.8, -5.7, -5.6, -5.5, -5.4, -5.3, -5.2, -5.1, -5, etc., where F1 is the effective focal length of the first lens element L1. By ensuring that the optical lens 100 satisfies the above relationship, the first lens element L1 can have an appropriate negative refractive power, which helps to moderate the change in the refraction angle of the incident light, avoiding excessive aberrations caused by excessive refraction changes. At the same time, it allows more light to enter the rear optical lens 100, thereby increasing the field of view of the optical lens 100 and improving the relative illumination of the optical lens 100.

[0043] In some embodiments, the optical lens 100 satisfies the following relationship: -4 ≤ F2 / F ≤ -2.5; for example, F2 / F is -4, -3.9, -3.8, -3.7, -3.6, -3.5, -3.4, -3.3, -3.2, -3.1, -3, -2.9, -2.8, -2.7, -2.6, -2.5, etc., where F2 is the effective focal length of the second lens L2. By ensuring that the optical lens 100 satisfies the above relationship, the second lens L2 can have an appropriate negative refractive power, which helps to slow down the entry of light into the optical lens 100 and simultaneously moves the light toward the imaging surface IMG of the optical lens 100, ensuring a better transition between the light emitted from the first lens L1 and the light incident on the second lens L2, thereby reducing the sensitivity of the optical lens 100.

[0044] In some embodiments, the optical lens 100 satisfies the following relationship: 3.9 ≤ F3 / F ≤ 4.3; for example, F3 / F is 3.9, 4, 4.1, 4.2, 4.3, etc., where F3 is the effective focal length of the third lens element L3. By ensuring that the optical lens 100 satisfies this relationship, the third lens element L3 can have an appropriate positive refractive power, which helps to slow the turning trend of light and reduce the height of light, resulting in a smooth transition of light. This also helps to reduce the difficulty of correcting spherical aberration and field curvature, thereby improving the imaging quality of the optical lens 100.

[0045] In some embodiments, the optical lens 100 satisfies the following relationship: -2 ≤ F2 / R3 ≤ -1; for example, F2 / R3 is -2, -1.9, -1.8, -1.7, -1.6, -1.5, -1.4, -1.3, -1.2, -1.1, -1, etc., where R3 is the radius of curvature of the object-side surface S3 of the second lens element L2 at the optical axis O. By ensuring that the optical lens 100 satisfies the above relationship, the second lens element L2 can provide sufficient negative refractive power for the optical lens element 100, thereby shortening the overall optical length of the optical lens element 100. At the same time, the refractive power of the second lens element L2 is not excessively strong, thereby facilitating correction of spherical aberration in the optical lens element 100.

[0046] In some embodiments, the optical lens 100 satisfies the following relationship: -4.2 ≤ F2 / R4 ≤ -3.2; for example, F2 / R4 is -4.2, -4.1, -4, -3.9, -3.8, -3.7, -3.6, -3.5, -3.4, -3.3, -3.2, etc., where R4 is the radius of curvature of the image-side surface S4 of the second lens element L2 at the optical axis O. By ensuring that the optical lens element 100 satisfies this relationship, the second lens element L2 can balance the spherical aberration generated by the first lens element L1, achieving good imaging quality, while also facilitating the divergence of light, expanding the field of view, and shortening the overall optical length of the optical lens element 100.

[0047] In some embodiments, the optical lens 100 satisfies the following relationship: 0.6 ≤ SAGS3 / CT2 ≤ 1.3; for example, SAGS3 / CT2 is 0.6, 0.7, 0.8, 0.9, 1, 1.1, 1.2, 1.3, etc. SAGS3 is the distance from the intersection of the object-side surface S3 of the second lens L2 and the optical axis O to the maximum effective aperture of the object-side surface S3 of the second lens L2 on the optical axis O, and CT2 is the thickness of the second lens L2 on the optical axis O. Satisfying the above relationship in the optical lens 100 facilitates reasonable control of the refractive power and thickness of the second lens L2 at various locations perpendicular to the optical axis O, prevents the second lens L2 from being too thick or too thin, reduces the incident angle of light on the object-side surface S3 of the second lens L2, and reduces the tolerance sensitivity of the optical lens 100.

[0048] In some embodiments, the optical lens 100 satisfies the following relationship: -11 ≤ R5 / R6 ≤ -3; for example, R5 / R6 is -11, -10.5, -10, -9.5, -9, -8.5, -8, -7.5, -7, -6.5, -6, -5.5, -5, -4.5, -4, -3.5, -3, etc. R5 is the radius of curvature of the object-side surface S5 of the third lens element L3 at the optical axis O, and R6 is the radius of curvature of the image-side surface S6 of the third lens element L3 at the optical axis O. By ensuring that the optical lens 100 satisfies the above relationship, the shape of the third lens element L3 is properly controlled, the spherical aberration, chromatic aberration, and field curvature of the optical lens element 100 are comprehensively balanced, the risk of ghosting is reduced, the resolution of the optical lens element 100 is improved, and the processing difficulty of the third lens element L3 is reduced.

[0049] In some embodiments, the optical lens 100 satisfies the following relationship: 4.4 ≤ TTL / CT3 ≤ 5.4; for example, TTL / CT3 is 4.4, 4.5, 4.6, 4.7, 4.8, 4.9, 5, 5.1, 5.2, 5.3, 5.4, etc., where CT3 is the thickness of the third lens element L3 along the optical axis O. Satisfying the above relationship facilitates a compact structure of the optical lens 100, shortens the overall optical length of the optical lens 100, and achieves a miniaturized design.

[0050] In some embodiments, the optical lens 100 satisfies the following relationship: 1≤SD6 / SD7≤1.25; for example, SD6 / SD7 is 1, 1.01, 1.02, 1.03, 1.04, 1.05, 1.06, 1.07, 1.08, 1.09, 1.1, 1.11, 1.12, 1.13, 1.14, 1.15, 1.16, 1.17, 1.18, 1.19, 1.2, 1.21, 1.22, 1.23, 1.24, 1.25, etc., where SD6 is half of the maximum effective aperture of the image-side surface S6 of the third lens element L3, and SD7 is half of the maximum effective aperture of the object-side surface S7 of the fourth lens element L4. By making the optical lens 100 satisfy the above relationship, the difference between half of the maximum effective apertures of the two lenses can be kept close, and the aperture step difference between the two lenses can be reduced, so that the light can be guided to transition better and more smoothly from the third lens L3 to the fourth lens L4.

[0051] In some embodiments, the optical lens 100 satisfies the following relationship: 1.1≤F4 / CT4≤1.21; for example, F4 / CT4 is 1.1, 1.11, 1.12, 1.13, 1.14, 1.15, 1.16, 1.17, 1.18, 1.19, 1.2, 1.21, etc., where F4 is the effective focal length of the fourth lens element L4, and CT4 is the thickness of the fourth lens element L4 along the optical axis O. Ensuring that the optical lens 100 satisfies the above relationship facilitates proper configuration of the refractive power and thickness of the fourth lens element L4, thereby effectively controlling the incident angle of light in the optical lens 100, reducing the sensitivity of the optical lens 100, and correcting aberrations generated by the optical lens 100, thereby improving the imaging quality of the optical lens 100.

[0052] In some embodiments, the optical lens 100 satisfies the following relationship: -1.9≤F5 / CT5≤-1.7; for example, F5 / CT5 is -1.9, -1.89, -1.88, -1.87, -1.86, -1.85, -1.84, -1.83, -1.82, -1.81, -1.8, -1.79, -1.78, -1.77, -1.76, -1.75, -1.74, -1.73, -1.72, -1.71, -1.7, etc., where F5 is the effective focal length of the fifth lens element L5, and CT5 is the thickness of the fifth lens element L5 along the optical axis O. By making the optical lens 100 satisfy the above relationship, it is beneficial to reasonably configure the refractive power and thickness of the fifth lens L5, thereby effectively reducing the loss of light in each field of view, improving the relative illumination of each field of view, and further improving the imaging quality of the optical lens 100.

[0053] In some embodiments, the fourth lens L4 and the fifth lens L5 are combined into a cemented lens group with negative refractive power, with the image-side surface S8 of the fourth lens L4 and the object-side surface S9 of the fifth lens L5 serving as cemented surfaces. Combining the fourth lens L4 and the fifth lens L5 into a cemented lens group with negative refractive power facilitates correction of chromatic aberration and balance of various aberrations, enabling high resolution of the optical lens 100, effectively reducing tolerance sensitivity, and improving the imaging quality of the optical lens 100. Furthermore, the overall optical length of the optical lens 100 is shortened, facilitating a compact design.

[0054] In some embodiments, the optical lens 100 satisfies the following relationship: -20 ≤ F45 / F ≤ -7; for example, F45 / F is -20, -19, -18, -17, -16, -15, -14, -13, -12, -11, -10, -9, -8, -7, etc. F45 is the combined effective focal length of the fourth lens element L4 and the fifth lens element L5. By ensuring that the optical lens 100 satisfies this relationship and rationally configuring the focal length ratio of the cemented lens group formed by the fourth lens element L4 and the fifth lens element L5, higher-order aberrations can be reduced, thereby improving the imaging quality of the optical lens 100.

[0055] In some embodiments, the optical lens 100 satisfies the following relationship: -2.4≤(R11-R12) / (R11+R12)≤-1.8; for example, (R11-R12) / (R11+R12) is -2.4, -2.3, -2.2, -2.1, -2, -1.9, -1.8, etc. R11 is the radius of curvature of the object-side surface S11 of the sixth lens L6 at the optical axis O, and R12 is the radius of curvature of the image-side surface S12 of the sixth lens L6 at the optical axis O. By ensuring that the optical lens 100 satisfies the above relationship, the sixth lens L6 can have an appropriate surface shape, which is beneficial for suppressing the angle of the edge field of view incident on the imaging surface IMG of the optical lens 100, while balancing various aberrations of the optical lens 100 and improving the imaging quality of the optical lens 100.

[0056] In some embodiments, the optical lens 100 satisfies the following relationship: 2≤CT6 / ET6≤2.35; for example, CT6 / ET6 is 2, 2.01, 2.02, 2.03, 2.04, 2.05, 2.06, 2.07, 2.08, 2.09, 2.1, 2.11, 2.12, 2.13, 2.14, 2.15, 2.16, 2.17, 2.18, 2.19, 2.2, 2.21, 2.22, 2.23, 2.24, 2.25, 2.26, 2.27, 2.28, 2.29, 2.3, 2.31, 2.32, 2.33, 2.34, 2.35, etc. Wherein, CT6 is the thickness of the sixth lens element L6 along the optical axis O, and ET6 is the distance from the maximum effective aperture of the object-side surface S11 of the sixth lens element L6 to the maximum effective aperture of the image-side surface S12 of the sixth lens element L6 along the optical axis O. By ensuring that the optical lens 100 satisfies the above relationship, the edge thickness and center thickness of the sixth lens element L6 are within a reasonable range, the surface profile of the sixth lens element L6 varies minimally, and aberrations in the optical lens 100 can be effectively controlled. This also helps reduce the difficulty of manufacturing the sixth lens element L6.

[0057] In some embodiments, the optical lens 100 satisfies the following relationship: 2≤F6 / F≤2.3; for example, F6 / F is 2, 2.01, 2.02, 2.03, 2.04, 2.05, 2.06, 2.07, 2.08, 2.09, 2.1, 2.11, 2.12, 2.13, 2.14, 2.15, 2.16, 2.17, 2.18, 2.19, 2.2, 2.21, 2.22, 2.23, 2.24, 2.25, 2.26, 2.27, 2.28, 2.29, 2.3, etc., where F6 is the effective focal length of the sixth lens element L6. By making the optical lens 100 satisfy the above relationship, the sixth lens L6 can have appropriate refractive power, which is beneficial to suppressing the angle of the edge field of view incident on the imaging surface IMG of the optical lens 100, and at the same time can balance various aberrations of the optical lens 100 and improve the imaging quality of the optical lens 100.

[0058] In some embodiments, the optical lens 100 satisfies the following relationship: 7≤TTL / ImgH≤7.2; for example, TTL / ImgH is 7, 7.01, 7.02, 7.03, 7.04, 7.05, 7.06, 7.07, 7.08, 7.09, 7.1, 7.11, 7.12, 7.13, 7.14, 7.15, 7.16, 7.17, 7.18, 7.19, 7.2, etc. By ensuring that the optical lens 100 satisfies the above relationship and rationally configuring the range of TTL / ImgH, the total optical length of the optical lens 100 is limited, enabling a miniaturized design of the optical lens 100 and meeting the requirements for lightweight drone structures.

[0059] In some embodiments, the optical lens 100 satisfies the following relationship: 1.7 ≤ TTL / ΣCT ≤ 1.75; for example, TTL / ΣCT is 1.7, 1.71, 1.72, 1.73, 1.74, 1.75, etc., where ΣCT is the sum of the thicknesses of all lenses from the first lens L1 to the sixth lens L6 along the optical axis O. Satisfying this relationship helps reduce the overall optical length and volume of the optical lens 100, maintains its compactness, and controls its weight.

[0060] In some embodiments, the optical lens 100 satisfies the following relationship: 2.1 ≤ TTL / SD1 ≤ 2.3. For example, TTL / SD1 is 2.1, 2.11, 2.12, 2.13, 2.14, 2.15, 2.16, 2.17, 2.18, 2.19, 2.2, 2.21, 2.22, 2.23, 2.24, 2.25, 2.26, 2.27, 2.28, 2.29, 2.3, etc. Where SD1 is half the maximum effective aperture of the object-side surface S1 of the first lens element L1. Ensuring that the optical lens 100 satisfies the above relationship facilitates miniaturization.

[0061] In some embodiments, the optical lens 100 satisfies the following relationship: 7.3 ≤ TTL / BFL ≤ 8; for example, TTL / BFL is 7.3, 7.35, 7.4, 7.45, 7.5, 7.55, 7.6, 7.65, 7.7, 7.75, 7.8, 7.85, 7.9, 7.95, 8, etc. Wherein, BFL is the distance from the image-side surface S12 of the sixth lens L6 to the imaging surface IMG of the optical lens 100 on the optical axis O. By ensuring that the optical lens 100 satisfies the above relationship, the back focal length of the optical lens 100 can be shortened, the optical lens 100 can be prevented from being excessively large, and the requirement for lightweight drone structures can be met.

[0062] In some embodiments, the optical lens 100 satisfies the following relationship: -25 ≤ (VD4 - VD3) / (R6 + R7 + R8 + R9) ≤ -17; for example, (VD4 - VD3) / (R6 + R7 + R8 + R9) is -25, -24.5, -24, -23.5, -23, -22.5, -22, -21.5, -21, -20.5, -20, -19.5, -19, -18.5, -18, -17.5, -17, etc., wherein VD3 is the Abbe number of the third lens element L3, VD4 is the Abbe number of the fourth lens element L4, R7 is the radius of curvature of the object-side surface S7 of the fourth lens element L4 at the optical axis O, R8 is the radius of curvature of the image-side surface S8 of the fourth lens element L4 at the optical axis O, and R9 is the radius of curvature of the object-side surface S9 of the fifth lens element L5 at the optical axis O. By making the optical lens 100 satisfy the above relationship, the chromatic aberration of the optical lens 100 can be effectively controlled, the risk of color cast of the optical lens 100 can be reduced, and the imaging quality of the optical lens 100 can be effectively improved.

[0063] In some embodiments, the optical lens 100 satisfies the following relationship: 4 ≤ SD1 * TTL / R1 ≤ 4.3; for example, SD1 * TTL / R is 4, 4.05, 4.1, 4.15, 4.2, 4.25, 4.3, etc., where R1 is the radius of curvature of the object-side surface S1 of the first lens L1 at the optical axis O. By ensuring that the optical lens 100 satisfies the above relationship, the volume of the optical lens 100 can be effectively controlled while ensuring the imaging quality of the optical lens 100, so that the total optical length of the entire optical lens 100 is less than 8 mm.

[0064] In some embodiments, the optical lens 100 satisfies the following relationship: -1 ≤ F2 / (R3 / R4) ≤ -0.55; for example, F2 / (R3 / R4) is -1, -0.95, -0.9, -0.85, -0.8, -0.75, -0.7, -0.65, -0.6, -0.55, etc. By ensuring that the optical lens 100 satisfies the above relationship, ghost images of the optical lens 100 can be effectively controlled while ensuring good imaging quality.

[0065] In some embodiments, the optical lens 100 satisfies the following relationship: 1.2≤(R5-R6) / (R5+R6)≤1.75; for example, (R5-R6) / (R5+R6) is 1.2, 1.25, 1.3, 1.35, 1.4, 1.45, 1.5, 1.55, 1.6, 1.65, 1.7, 1.75, etc. By ensuring that the optical lens 100 satisfies the above relationship, the third lens element L3 can have an appropriate surface shape, which helps to slow down the turning trend of light and reduce the height of light, thereby ensuring a smooth transition of light. It also helps to reduce the difficulty of correcting spherical aberration and field curvature, thereby improving the imaging quality of the optical lens 100.

[0066] In some embodiments, the optical lens 100 satisfies the following relationship: 1.55≤F4 / F≤1.75; for example, F4 / F is 1.55, 1.56, 1.57, 1.58, 1.59, 1.6, 1.61, 1.62, 1.63, 1.64, 1.65, 1.66, 1.67, 1.68, 1.69, 1.7, 1.71, 1.72, 1.73, 1.74, 1.75, etc. By ensuring that the optical lens 100 satisfies the above relationship, the fourth lens element L4 can have an appropriate positive refractive power to converge the light emitted from the third lens element L3 and ensure a smooth transition of the light.

[0067] In some embodiments, the optical lens 100 satisfies the following relationship: -1.2 ≤ F5 / F ≤ -0.95; for example, F5 / F is -1.2, -1.15, -1.1, -1.05, -1, -0.95, etc. By ensuring that the optical lens 100 satisfies this relationship, the fifth lens element L5 can have an appropriate negative refractive power, thereby correcting various aberrations introduced by the optical lens 100, reducing light loss in each field of view, and improving the relative illumination of each field of view, thereby enhancing the imaging quality of the optical lens 100.

[0068] In some embodiments, the optical lens 100 satisfies the following relationship: 3 ≤ R1 / R2 ≤ 3.7; for example, R1 / R2 is 3, 3.05, 3.1, 3.15, 3.2, 3.25, 3.3, 3.35, 3.4, 3.45, 3.5, 3.55, 3.6, 3.65, 3.7, etc., where R2 is the radius of curvature of the image-side surface S2 of the first lens element L1 at the optical axis O. By ensuring that the optical lens 100 satisfies the above relationship, the shape of the first lens element L1 is properly controlled, the spherical aberration, chromatic aberration, and field curvature of the optical lens element 100 are comprehensively balanced, the risk of ghosting is reduced, the resolution of the optical lens element 100 is improved, and the processing difficulty of the first lens element L1 is reduced.

[0069] In some embodiments, the optical lens 100 satisfies the following relationship: 2.3 ≤ R3 / R4 ≤ 3.2; for example, R3 / R4 is 2.3, 2.4, 2.5, 2.6, 2.7, 2.8, 2.9, 3, 3.1, 3.2, etc. By ensuring that the optical lens 100 satisfies this relationship, the shape of the second lens element L2 can be properly controlled, spherical aberration, chromatic aberration, and field curvature of the optical lens 100 can be comprehensively balanced, the risk of ghosting can be reduced, the resolution of the optical lens 100 can be improved, and the manufacturing difficulty of the second lens element L2 can be reduced.

[0070] In some embodiments, the optical lens 100 satisfies the following relationship: -2.5 ≤ R7 / R8 ≤ -2.1; for example, R7 / R8 is -2.5, -2.45, -2.4, -2.35, -2.3, -2.25, -2.2, -2.15, -2.1, etc. By ensuring that the optical lens 100 satisfies this relationship, the shape of the fourth lens element L4 can be properly controlled, spherical aberration, chromatic aberration, and field curvature of the optical lens 100 can be comprehensively balanced, the risk of ghosting can be reduced, the resolution of the optical lens 100 can be improved, and the manufacturing difficulty of the fourth lens element L4 can be reduced.

[0071] In some embodiments, the optical lens 100 satisfies the following relationship: -0.5 ≤ R9 / R10 ≤ -0.4; for example, R9 / R10 is -0.5, -0.49, -0.48, -0.47, -0.46, -0.45, -0.44, -0.43, -0.42, -0.41, -0.4, etc., where R10 is the radius of curvature of the image-side surface S10 of the fifth lens element L5 at the optical axis O. By ensuring that the optical lens 100 satisfies the above relationship, the shape of the fifth lens element L5 is properly controlled, the spherical aberration, chromatic aberration, and field curvature of the optical lens element 100 are comprehensively balanced, the risk of ghosting is reduced, the resolution of the optical lens element 100 is improved, and the processing difficulty of the fifth lens element L5 is reduced.

[0072] In some embodiments, the optical lens 100 satisfies the following relationship: -0.42 ≤ R11 / R12 ≤ -0.3; for example, R11 / R12 is -0.42, -0.41, -0.4, -0.39, -0.38, -0.37, -0.36, -0.35, -0.34, -0.33, -0.32, -0.31, -0.3, etc. By ensuring that the optical lens 100 satisfies this relationship, the shape of the sixth lens element L6 can be properly controlled, spherical aberration, chromatic aberration, and field curvature of the optical lens 100 can be comprehensively balanced, the risk of ghosting can be reduced, the resolution of the optical lens 100 can be improved, and the processing difficulty of the sixth lens element L6 can be reduced.

[0073] The surface shape of each aspheric lens can be defined using, but not limited to, the following aspheric formula:

[0074]

[0075] Where Z is the distance from the corresponding point on the aspheric surface to the plane tangent to the vertex of the surface, c is the curvature of the aspheric vertex, c = 1 / Y, Y is the radius of curvature (i.e., the paraxial curvature c is the reciprocal of the Y radius in Table 1a), r is the distance from any point on the aspheric surface to the optical axis O, k is the cone constant, and Ai is the coefficient corresponding to the i-th higher-order term in the aspheric surface shape formula.

[0076] The optical lens 100 of this embodiment will be described in detail below with reference to specific parameters.

[0077] First embodiment

[0078] The structural 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 and a filter IR, which are arranged in sequence from the object side to the image side along the optical axis O.

[0079] 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 negative refractive power, and the sixth lens L6 has positive refractive power.

[0080] The object-side surface S1 of the first lens element L1 is convex at the near optical axis O, and the image-side surface S2 of the first lens element L1 is concave at the near optical axis O; the object-side surface S3 of the second lens element L2 is convex at the near optical axis O, and the image-side surface S4 of the second lens element L2 is concave at the near optical axis O; the object-side surface S5 of the third lens element L3 is convex at the near optical axis O, and the image-side surface S6 of the third lens element L3 is convex at the near optical axis O; the object-side surface S7 of the fourth lens element L4 is convex at the near optical axis O, and the image-side surface S8 of the fourth lens element L4 is convex at the near optical axis O; the object-side surface S9 of the fifth lens element L5 is concave at the near optical axis O, and the image-side surface S10 of the fifth lens element L5 is concave at the near optical axis O; the object-side surface S11 of the sixth lens element L6 is convex at the near optical axis O, and the image-side surface S12 of the sixth lens element L6 is convex at the near optical axis O.

[0081] Specifically, the Y radius in Table 1a represents the radius of curvature of the object-side or image-side surface of the corresponding surface number at optical axis O. The fourth lens element L4 and the fifth lens element L5 form a cemented lens group with negative refractive power. The image-side surface S8 of the fourth lens element L4 and the object-side surface S9 of the fifth lens element L5 have the same surface type and Y radius. The first value in the "Thickness" column for a lens represents the thickness of the lens along the optical axis O, and the second value represents the distance from the image-side surface to the rear surface of the lens along the optical axis O. The value for aperture stop STO in the "Thickness" column represents the distance from aperture stop STO to the vertex of the rear surface (the vertex refers to the intersection of the surface with the optical axis O) along the optical axis O. The direction from the object-side surface S1 of the first lens element L1 to the image-side surface S12 of the sixth lens element L6 is assumed to be the positive direction of the optical axis O. A negative value indicates that aperture stop STO is located on the image side of the rear vertex. A positive value indicates that aperture stop STO is located on the object side of the rear vertex. It is understood that the units of the Y radius, thickness, and effective focal length in Table 1a are all in mm. Furthermore, the reference wavelength for the refractive index, Abbe number, and effective focal length of each lens L in Table 1a is all 555.0000 nm.

[0082] In the first embodiment, the object-side surface and image-side surface of the second lens element L2, the third lens element L3, the fourth lens element L4, the fifth lens element L5, and the sixth lens element L6 are all aspherical surfaces. Table 1b shows the conic constant k and the high-order coefficients A4, A6, A8, A10, A12, A14, and A16 that can be used for the aspherical mirror surfaces in the first embodiment.

[0083] Table 1a

[0084]

[0085] Table 1b

[0086]

[0087] See also Figure 2 (A) in Figure 2 (A) shows the longitudinal spherical aberration diagram of the optical lens 100 in the first embodiment at wavelengths of 650.0000nm, 610.0000nm, 555.0000nm, 510.0000nm, 470.0000nm, and 435.0000nm. The horizontal axis along the X-axis represents the focus offset 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 FIG, the spherical aberration value of the optical lens 100 in the first embodiment is better, indicating that the imaging quality of the optical lens 100 in this embodiment is better. Figure 2 (B) in Figure 2 (B) in the figure shows the astigmatism diagram of the optical lens 100 in the first embodiment at a wavelength of 555.0000 nm. The horizontal axis along the X-axis represents the focus offset in mm, and the vertical axis along the Y-axis represents the field angle in degrees. In the astigmatism diagram, T represents the curvature of the imaging surface IMG in the sub-arc direction, and S represents the curvature of the imaging surface IMG in the sagittal direction. Figure 2 As can be seen from (B) in FIG, at this wavelength, the astigmatism of the optical lens 100 is well compensated. Figure 2 (C) in Figure 2 (C) shows the distortion curve of the optical lens 100 in the first embodiment at a wavelength of 555.0000 nm. The horizontal axis along the X-axis represents the distortion, and the vertical axis along the Y-axis represents the field of view, with the unit being deg. Figure 2 As can be seen from (C) in FIG. 1 , at this wavelength, the distortion of the optical lens 100 is well corrected.

[0088] Second embodiment

[0089] The structural diagram of the optical lens 100 disclosed in the second embodiment of the present application is as follows: Figure 3 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 and a filter IR, which are arranged in sequence from the object side to the image side along the optical axis O.

[0090] 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 negative refractive power, and the sixth lens L6 has positive refractive power.

[0091] The object-side surface S1 of the first lens element L1 is convex at the near optical axis O, and the image-side surface S2 of the first lens element L1 is concave at the near optical axis O; the object-side surface S3 of the second lens element L2 is convex at the near optical axis O, and the image-side surface S4 of the second lens element L2 is concave at the near optical axis O; the object-side surface S5 of the third lens element L3 is convex at the near optical axis O, and the image-side surface S6 of the third lens element L3 is convex at the near optical axis O; the object-side surface S7 of the fourth lens element L4 is convex at the near optical axis O, and the image-side surface S8 of the fourth lens element L4 is convex at the near optical axis O; the object-side surface S9 of the fifth lens element L5 is concave at the near optical axis O, and the image-side surface S10 of the fifth lens element L5 is concave at the near optical axis O; the object-side surface S11 of the sixth lens element L6 is convex at the near optical axis O, and the image-side surface S12 of the sixth lens element L6 is convex at the near optical axis O.

[0092] The other parameters of the second embodiment are given in Table 2a below. The definitions of each parameter can be found in the description of the previous embodiment and are not repeated here. It should be understood that the units of the Y radius, thickness, and effective focal length in Table 2a are all in mm. The reference wavelength for the refractive index, Abbe number, and effective focal length of each lens L in Table 2a is 555.0000 nm.

[0093] In the second embodiment, the object-side surface and image-side surface of the second lens element L2, the third lens element L3, the fourth lens element L4, the fifth lens element L5, and the sixth lens element L6 are all aspherical surfaces. Table 2b shows the conic constant k and the high-order coefficients A4, A6, A8, A10, A12, A14, and A16 that can be used for the aspherical mirror surfaces in the second embodiment.

[0094] Table 2a

[0095]

[0096]

[0097] Table 2b

[0098]

[0099] See also Figure 4 ,Depend on Figure 4 As can be seen from the longitudinal spherical aberration diagram (A), astigmatism diagram (B), and distortion curve diagram (C), the longitudinal spherical aberration, astigmatism, and distortion of the optical lens 100 in the second embodiment 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) in Figure 2(B) in Figure 2 The contents described in (C) will not be repeated here.

[0100] Third embodiment

[0101] The structural 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 and a filter IR, which are arranged in sequence from the object side to the image side along the optical axis O.

[0102] 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 negative refractive power, and the sixth lens L6 has positive refractive power.

[0103] The object-side surface S1 of the first lens element L1 is convex at the near optical axis O, and the image-side surface S2 of the first lens element L1 is concave at the near optical axis O; the object-side surface S3 of the second lens element L2 is convex at the near optical axis O, and the image-side surface S4 of the second lens element L2 is concave at the near optical axis O; the object-side surface S5 of the third lens element L3 is convex at the near optical axis O, and the image-side surface S6 of the third lens element L3 is convex at the near optical axis O; the object-side surface S7 of the fourth lens element L4 is convex at the near optical axis O, and the image-side surface S8 of the fourth lens element L4 is convex at the near optical axis O; the object-side surface S9 of the fifth lens element L5 is concave at the near optical axis O, and the image-side surface S10 of the fifth lens element L5 is concave at the near optical axis O; the object-side surface S11 of the sixth lens element L6 is convex at the near optical axis O, and the image-side surface S12 of the sixth lens element L6 is convex at the near optical axis O.

[0104] The other parameters of the third embodiment are given in Table 3a below. The definitions of each parameter can be found in the description of the previous embodiment and are not repeated here. It should be understood that the units of the Y radius, thickness, and effective focal length in Table 3a are all in mm. The reference wavelength for the refractive index, Abbe number, and effective focal length of each lens L in Table 3a is 555.0000 nm.

[0105] In the third embodiment, the object-side surface and image-side surface of the second lens element L2, the third lens element L3, the fourth lens element L4, the fifth lens element L5, and the sixth lens element L6 are all aspherical surfaces. Table 3b shows the conic constant k and the higher-order coefficients A4, A6, A8, A10, A12, A14, and A16 that can be used for the aspherical mirror surfaces in the third embodiment.

[0106] Table 3a

[0107]

[0108] Table 3b

[0109]

[0110] See also Figure 6 ,Depend on Figure 6 As can be seen from the longitudinal spherical aberration diagram (A), astigmatism diagram (B), and distortion curve diagram (C), the longitudinal spherical aberration, astigmatism, and distortion of the optical lens 100 in the third embodiment 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) in Figure 2 (B) in Figure 2 The contents described in (C) will not be repeated here.

[0111] Fourth embodiment

[0112] The structural 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 and a filter IR, which are arranged in sequence from the object side to the image side along the optical axis O.

[0113] 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 negative refractive power, and the sixth lens L6 has positive refractive power.

[0114] The object-side surface S1 of the first lens element L1 is convex at the near optical axis O, and the image-side surface S2 of the first lens element L1 is concave at the near optical axis O; the object-side surface S3 of the second lens element L2 is convex at the near optical axis O, and the image-side surface S4 of the second lens element L2 is concave at the near optical axis O; the object-side surface S5 of the third lens element L3 is convex at the near optical axis O, and the image-side surface S6 of the third lens element L3 is convex at the near optical axis O; the object-side surface S7 of the fourth lens element L4 is convex at the near optical axis O, and the image-side surface S8 of the fourth lens element L4 is convex at the near optical axis O; the object-side surface S9 of the fifth lens element L5 is concave at the near optical axis O, and the image-side surface S10 of the fifth lens element L5 is concave at the near optical axis O; the object-side surface S11 of the sixth lens element L6 is convex at the near optical axis O, and the image-side surface S12 of the sixth lens element L6 is convex at the near optical axis O.

[0115] The other parameters of the fourth embodiment are given in Table 4a below. The definitions of the parameters can be found in the description of the previous embodiment and are not repeated here. It should be understood that the units of the Y radius, thickness, and effective focal length in Table 4a are all in mm. The reference wavelength for the refractive index, Abbe number, and effective focal length of each lens L in Table 4a is 555.0000 nm.

[0116] In the fourth embodiment, the object-side surface and image-side surface of the second lens element L2, the third lens element L3, the fourth lens element L4, the fifth lens element L5, and the sixth lens element L6 are all aspherical surfaces. Table 4b shows the conic constant k and the high-order coefficients A4, A6, A8, A10, A12, A14, and A16 that can be used for the aspherical mirror surfaces in the first embodiment.

[0117] Table 4a

[0118]

[0119] Table 4b

[0120]

[0121]

[0122] See also Figure 8 ,Depend on Figure 8 As can be seen from the longitudinal spherical aberration diagram (A), astigmatism diagram (B), and distortion curve diagram (C), the longitudinal spherical aberration, astigmatism, and distortion of the optical lens 100 in the fourth embodiment 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) in Figure 2 (B) in Figure 2 The contents described in (C) will not be repeated here.

[0123] Fifth embodiment

[0124] The structural diagram of the optical lens 100 disclosed in the fifth embodiment of the present application is as follows: Figure 9 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 and a filter IR, which are arranged in sequence from the object side to the image side along the optical axis O.

[0125] 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 negative refractive power, and the sixth lens L6 has positive refractive power.

[0126] The object-side surface S1 of the first lens element L1 is convex at the near optical axis O, and the image-side surface S2 of the first lens element L1 is concave at the near optical axis O; the object-side surface S3 of the second lens element L2 is convex at the near optical axis O, and the image-side surface S4 of the second lens element L2 is concave at the near optical axis O; the object-side surface S5 of the third lens element L3 is convex at the near optical axis O, and the image-side surface S6 of the third lens element L3 is convex at the near optical axis O; the object-side surface S7 of the fourth lens element L4 is convex at the near optical axis O, and the image-side surface S8 of the fourth lens element L4 is convex at the near optical axis O; the object-side surface S9 of the fifth lens element L5 is concave at the near optical axis O, and the image-side surface S10 of the fifth lens element L5 is concave at the near optical axis O; the object-side surface S11 of the sixth lens element L6 is convex at the near optical axis O, and the image-side surface S12 of the sixth lens element L6 is convex at the near optical axis O.

[0127] The other parameters of the fifth embodiment are given in Table 5a below. The definitions of each parameter can be found in the description of the previous embodiment and are not repeated here. It should be understood that the units of the Y radius, thickness, and effective focal length in Table 5a are all in mm. The reference wavelength for the refractive index, Abbe number, and effective focal length of each lens L in Table 5a is 555.0000 nm.

[0128] In the fifth embodiment, the object-side surface and image-side surface of the second lens element L2, the third lens element L3, the fourth lens element L4, the fifth lens element L5, and the sixth lens element L6 are all aspherical surfaces. Table 5b shows the conic constant k and the high-order coefficients A4, A6, A8, A10, A12, A14, and A16 that can be used for the aspherical mirror surfaces in the fifth embodiment.

[0129] Table 5a

[0130]

[0131]

[0132] Table 5b

[0133]

[0134] See also Figure 10 ,Depend on Figure 10 As can be seen from the longitudinal spherical aberration diagram (A), astigmatism diagram (B), and distortion curve diagram (C), the longitudinal spherical aberration, astigmatism, and distortion of the optical lens 100 in the fifth embodiment are well controlled, so that the optical lens 100 of this embodiment has good imaging quality. 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. Figure 2 (A) in Figure 2 (B) in Figure 2 The contents described in (C) will not be repeated here.

[0135] Sixth embodiment

[0136] The structural diagram of the optical lens 100 disclosed in the sixth embodiment of the present application is as follows: Figure 11 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 and a filter IR, which are arranged in sequence from the object side to the image side along the optical axis O.

[0137] 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 negative refractive power, and the sixth lens L6 has positive refractive power.

[0138] The object-side surface S1 of the first lens element L1 is convex at the near optical axis O, and the image-side surface S2 of the first lens element L1 is concave at the near optical axis O; the object-side surface S3 of the second lens element L2 is convex at the near optical axis O, and the image-side surface S4 of the second lens element L2 is concave at the near optical axis O; the object-side surface S5 of the third lens element L3 is convex at the near optical axis O, and the image-side surface S6 of the third lens element L3 is convex at the near optical axis O; the object-side surface S7 of the fourth lens element L4 is convex at the near optical axis O, and the image-side surface S8 of the fourth lens element L4 is convex at the near optical axis O; the object-side surface S9 of the fifth lens element L5 is concave at the near optical axis O, and the image-side surface S10 of the fifth lens element L5 is concave at the near optical axis O; the object-side surface S11 of the sixth lens element L6 is convex at the near optical axis O, and the image-side surface S12 of the sixth lens element L6 is convex at the near optical axis O.

[0139] The remaining parameters of the sixth embodiment are given in Table 6a below. The definitions of these parameters can be found in the description of the preceding embodiments and are not further elaborated here. It should be understood that the units of the Y radius, thickness, and effective focal length in Table 6a are all in mm. The reference wavelength for the refractive index, Abbe number, and effective focal length of each lens L in Table 6a is 555.0000 nm.

[0140] In the sixth embodiment, the object-side surface and image-side surface of the second lens element L2, the third lens element L3, the fourth lens element L4, the fifth lens element L5, and the sixth lens element L6 are all aspherical surfaces. Table 6b shows the conic constant k and the high-order coefficients A4, A6, A8, A10, A12, A14, and A16 that can be used for the aspherical mirror surfaces in the sixth embodiment.

[0141] Table 6a

[0142]

[0143] Table 6b

[0144]

[0145] See also Figure 12 ,Depend on Figure 12 As can be seen from the longitudinal spherical aberration diagram (A), astigmatism diagram (B), and distortion curve diagram (C), the longitudinal spherical aberration, astigmatism, and distortion of the optical lens 100 in the sixth embodiment are well controlled, so that the optical lens 100 of this embodiment has good imaging quality. Figure 12 (A) Figure 12 (B) and Figure 12 The wavelengths corresponding to the curves in (C) can be referred to in the first embodiment. Figure 2 (A) in Figure 2 (B) in Figure 2 The contents described in (C) will not be repeated here.

[0146] Seventh embodiment

[0147] The structural diagram of the optical lens 100 disclosed in the seventh embodiment of the present application is as follows: Figure 13 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 and a filter IR, which are arranged in sequence from the object side to the image side along the optical axis O.

[0148] 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 negative refractive power, and the sixth lens L6 has positive refractive power.

[0149] The object-side surface S1 of the first lens element L1 is convex at the near optical axis O, and the image-side surface S2 of the first lens element L1 is concave at the near optical axis O; the object-side surface S3 of the second lens element L2 is convex at the near optical axis O, and the image-side surface S4 of the second lens element L2 is concave at the near optical axis O; the object-side surface S5 of the third lens element L3 is convex at the near optical axis O, and the image-side surface S6 of the third lens element L3 is convex at the near optical axis O; the object-side surface S7 of the fourth lens element L4 is convex at the near optical axis O, and the image-side surface S8 of the fourth lens element L4 is convex at the near optical axis O; the object-side surface S9 of the fifth lens element L5 is concave at the near optical axis O, and the image-side surface S10 of the fifth lens element L5 is concave at the near optical axis O; the object-side surface S11 of the sixth lens element L6 is convex at the near optical axis O, and the image-side surface S12 of the sixth lens element L6 is convex at the near optical axis O.

[0150] The other parameters of the seventh embodiment are given in Table 7a below. The definitions of the parameters can be found in the description of the previous embodiment and are not repeated here. It should be understood that the units of the Y radius, thickness, and effective focal length in Table 7a are all in mm. The reference wavelength for the refractive index, Abbe number, and effective focal length of each lens L in Table 7a is 555.0000 nm.

[0151] In the seventh embodiment, the object-side surface and image-side surface of the second lens element L2, the third lens element L3, the fourth lens element L4, the fifth lens element L5, and the sixth lens element L6 are all aspherical surfaces. Table 7b shows the conic constant k and the high-order coefficients A4, A6, A8, A10, A12, A14, and A16 that can be used for the aspherical mirror surfaces in the seventh embodiment.

[0152] Table 7a

[0153]

[0154] Table 7b

[0155]

[0156]

[0157] See also Figure 14 ,Depend on Figure 14 As can be seen from the longitudinal spherical aberration diagram (A), astigmatism diagram (B), and distortion curve diagram (C), the longitudinal spherical aberration, astigmatism, and distortion of the optical lens 100 in the seventh embodiment are well controlled, so that the optical lens 100 of this embodiment has good imaging quality. Figure 14 (A) Figure 14 (B) and Figure 14 The wavelengths corresponding to the curves in (C) can be referred to in the first embodiment. Figure 2 (A) in Figure 2 (B) in Figure 2 The contents described in (C) will not be repeated here.

[0158] Table 8 shows the FOV, FNO, TTL / F, ImgH / F, FOV / FNO, F1 / F, F2 / F, F3 / F, F2 / R3, F2 / R4, SAGS3 / CT2, R5 / R6, TTL / CT3, SD6 / SD7, F4 / CT4, F5 / CT5, F45 / F, (R11-R12) / (R11+R12), The values ​​of CT6 / ET6, F6 / F, TTL / ImgH, TTL / ΣCT, TTL / SD1, TTL / BFL, (VD4-VD3) / (R6+R7+R8+R9), SD1*TTL / R1, F2 / (R3 / R4), (R5-R6) / (R5+R6), F4 / F, F5 / F, R1 / R2, R3 / R4, R7 / R8, R9 / R10, and R11 / R12.

[0159] Table 8

[0160]

[0161]

[0162] See Figure 15 The present application also provides a camera module 200. The camera module 100 includes the optical lens 100 of any of the above embodiments and an image sensor 201. The image sensor 201 is disposed on the image side of the optical lens 100. The image sensor 201 can be a complementary metal oxide semiconductor (CMOS) image sensor or a charge-coupled device (CCD).

[0163] See Figure 16 The embodiment of the present application further provides an electronic device 300. The electronic device 300 includes a housing 301 and a camera module 200, wherein the camera module 200 is mounted on the housing 301. The electronic device 300 of the embodiment of the present application includes, but is not limited to, drones, mobile phones, tablet computers, smart watches, thumb cameras, vehicle-mounted devices, monitors, driving recorders, laptop computers, e-book readers, portable multimedia players (PMPs), portable phones, video phones, mobile medical devices, wearable devices, and other electronic devices that support imaging.

[0164] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application and are not intended to limit the present application. Although the present application has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solutions of the present application may be modified or replaced by equivalents without departing from the spirit and scope of the technical solutions of the present application.

Claims

1. An optical lens, characterized in that: There are six lenses with refractive power, including the following from the object side to the image side along the optical axis: The first lens element has negative refractive power, with its object-side surface being convex near the optical axis and its image-side surface being concave near the optical axis; The second lens element has negative refractive power, with its object-side surface being convex near the optical axis and its image-side surface being concave near the optical axis; The third lens has positive refractive power, its object-side surface is convex near the optical axis, and its image-side surface is convex near the optical axis; The fourth lens element has positive refractive power, its object-side surface is convex near the optical axis, and its image-side surface is convex near the optical axis; The fifth lens element has negative refractive power, with its object-side surface being concave near the optical axis and its image-side surface being concave near the optical axis; The sixth lens element has positive refractive power, its object-side surface is convex near the optical axis, and its image-side surface is convex near the optical axis; The optical lens satisfies the following relationship: 200°≤FOV≤210°, 1.3≤FNO≤1.45; Wherein, FOV is the maximum field of view of the optical lens, and FNO is the aperture number of the optical lens.

2. The optical lens according to claim 1, wherein: The optical lens satisfies the following relationship: 12≤TTL / F≤13.5, and / or, 1.7≤ImgH / F≤1.9, and / or, 142°≤FOV / FNO≤158°; Wherein, TTL is the distance from the object side of the first lens to the imaging surface of the optical lens on the optical axis, F is the effective focal length of the optical lens, and ImgH is half of the image height corresponding to the maximum field of view angle of the optical lens.

3. The optical lens according to claim 1, wherein: The optical lens satisfies the following relationship: -7≤F1 / F≤-5, and / or, -4≤F2 / F≤-2.5, and / or, 3.9≤F3 / F≤4.3; Among them, F is the effective focal length of the optical lens, F1 is the effective focal length of the first lens, F2 is the effective focal length of the second lens, and F3 is the effective focal length of the third lens.

4. The optical lens according to claim 1, wherein: The optical lens satisfies the following relationship: -2≤F2 / R3≤-1, and / or, -4.2≤F2 / R4≤-3.2, and / or, 0.6≤SAGS3 / CT2≤1.3; Wherein, F2 is the effective focal length of the second lens, R3 is the radius of curvature of the object-side surface of the second lens at the optical axis, R4 is the radius of curvature of the image-side surface of the second lens at the optical axis, SAGS3 is the distance from the intersection of the object-side surface of the second lens and the optical axis to the maximum effective aperture of the object-side surface of the second lens on the optical axis, and CT2 is the thickness of the second lens on the optical axis.

5. The optical lens according to claim 1, wherein: The optical lens satisfies the following relationship: -11≤R5 / R6≤-3, and / or, 4.4≤TTL / CT3≤5.4, and / or, 1≤SD6 / SD7≤1.25; Among them, 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, TTL is the distance from the object side surface of the first lens to the imaging surface of the optical lens on the optical axis, CT3 is the thickness of the third lens on the optical axis, SD6 is half of the maximum effective aperture of the image side surface of the third lens, and SD7 is half of the maximum effective aperture of the object side surface of the fourth lens.

6. The optical lens according to claim 1, wherein: The optical lens satisfies the following relationship: 1.1≤F4 / CT4≤1.21, and / or, -1.9≤F5 / CT5≤-1.7, and / or, -20≤F45 / F≤-7; Among them, F is the effective focal length of the optical lens, F4 is the effective focal length of the fourth lens, F5 is the effective focal length of the fifth lens, F45 is the combined effective focal length of the fourth lens and the fifth lens, CT4 is the thickness of the fourth lens on the optical axis, and CT5 is the thickness of the fifth lens on the optical axis.

7. The optical lens according to claim 1, wherein: The optical lens satisfies the following relationship: -2.4≤(R11-R12) / (R11+R12)≤-1.8, and / or, 2≤CT6 / ET6≤2.35, and / or, 2≤F6 / F≤2.3; Among them, F is the effective focal length of the optical lens, F6 is the effective focal length of the sixth lens, R11 is the curvature radius of the object side surface of the sixth lens at the optical axis, R12 is the curvature radius of the image side surface of the sixth lens at the optical axis, CT6 is the thickness of the sixth lens on the optical axis, and ET6 is the distance from the maximum effective aperture of the object side surface of the sixth lens to the maximum effective aperture of the image side surface of the sixth lens in the optical axis direction.

8. The optical lens according to claim 1, wherein: The optical lens satisfies the following relationship: 7≤TTL / ImgH≤7.2, and / or, 1.7≤TTL / ΣCT≤1.75, and / or, 2.1≤TTL / SD1≤2.3, and / or, 7.3≤TTL / BFL≤8; Wherein, TTL is the distance from the object side surface of the first lens to the imaging surface of the optical lens on the optical axis, ImgH is half of the image height corresponding to the maximum field of view of the optical lens, ΣCT is the sum of the thicknesses of all lenses from the first lens to the sixth lens on the optical axis, SD1 is half of the maximum effective aperture of the object side surface of the first lens, and BFL is the distance from the image side surface of the sixth lens to the imaging surface of the optical lens on the optical axis.

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

10. An electronic device, characterized in that: include: case; and The camera module as described in claim 9 is installed in the shell.

Images