Optical lenses, camera modules and electronic devices

Abstract

This application discloses an optical lens, a camera module, and an electronic device, comprising six refractive lenses arranged sequentially along the optical axis from the object side to the image side: a first lens with negative refractive power, its object-side and image-side surfaces being convex and concave near the optical axis, respectively; a second lens with negative refractive power, its object-side and image-side surfaces being convex and concave near the optical axis, respectively; a third lens with positive refractive power, its object-side and image-side surfaces being convex near the optical axis; a fourth lens with positive refractive power, its object-side and image-side surfaces being convex near the optical axis; a fifth lens with negative refractive power, its object-side and image-side surfaces being concave near the optical axis; and a sixth lens with positive refractive power, its object-side and image-side surfaces being convex near the optical axis. The optical lens satisfies the following relationships: 200°≤FOV≤210°, 1.3≤FNO≤1.45. The aforementioned optical lens can simultaneously meet the requirements of a large field of view, high light intake, and miniaturization.

Description

Technical Field

[0001] This application relates to the field of optical imaging technology, specifically to an optical lens, a camera module, and an electronic device. Background Technology

[0002] With the rapid development of drone technology and the continuous expansion of its application fields, users have increasingly higher requirements for the imaging quality of drone optical lenses. Among these requirements, wide field of view, high light intake, and high pixel count have become one of the core indicators for measuring device performance. However, due to the size and weight constraints of drones, it is difficult to achieve an ideal balance between imaging quality and lightweight structure in optical lenses. Summary of the Invention

[0003] In view of the above, it is necessary to propose an optical lens, camera module and electronic device to meet the requirements of wide field of view, high light intake and miniaturization.

[0004] The first aspect of this application provides an optical lens comprising six refractive lenses, arranged sequentially along the optical axis from the object side to the image side: a first lens having negative refractive power, its object side being convex near the optical axis and its image side being concave near the optical axis; a second lens having negative refractive power, its object side being convex near the optical axis and its image side being concave near the optical axis; a third lens having positive refractive power, its object side being convex near the optical axis and its image side being concave near the optical axis; and a fourth lens having positive refractive power, its object side being convex near the optical axis and its image side being concave near the optical axis; and a fifth lens having positive refractive power, its object side being convex near the optical axis and its image side being concave near the optical axis. The fifth lens has a negative refractive power, with its object-side surface concave near the optical axis and its image-side surface concave near the optical axis; the sixth lens has a positive refractive power, with its object-side surface convex near the optical axis and its image-side surface convex near the optical axis; the optical lenses satisfy the following relationships: 200°≤FOV≤210°, 1.3≤FNO≤1.45; where FOV is the maximum field of view of the optical lens, and FNO is the aperture number of the optical lens.

[0005] The aforementioned optical lens, by setting the first lens to have negative refractive power, with its object-side and image-side surfaces being convex and concave near the optical axis respectively, facilitates the coupling of a large field of view light into the optical lens, improving the relative illumination of the edge field of view; the second lens also has negative refractive power, with its object-side and image-side surfaces being convex and concave near the optical axis respectively, further slowing down the light entering the optical lens, while also shifting the light towards the imaging plane of the optical lens, ensuring a good transition between the light emanating 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, with both its object-side and image-side surfaces being convex near the optical axis, which, together with the second lens with negative refractive power, shifts the light towards the imaging plane of the optical lens, while effectively controlling chromatic aberration of the optical lens, reducing the risk of color cast, and thus being advantageous. To improve the imaging quality of the optical lens, the fourth lens has positive refractive power, with both its object-side and image-side surfaces convex near the optical axis. The fifth lens has negative refractive power, with both its object-side and image-side surfaces concave near the optical axis. The combination of the fourth and fifth lenses further controls chromatic aberration, converges light rays from the third lens, and smooths the light transition. It also corrects various aberrations introduced by the preceding optical lens, reduces light loss in each field of view, and improves relative illumination in each field of view, thus enhancing the imaging quality of the optical lens. The sixth lens also has positive refractive power, with both its object-side and image-side surfaces convex near the optical axis. This effectively suppresses the angle at which edge fields of view are incident on the imaging plane of the optical lens, allowing more light to effectively enter the imaging plane. It also balances various aberrations in the optical lens, further improving its imaging quality. By rationally configuring the refractive power and surface shape of each lens, the optical lens achieves a compact structure, meeting miniaturization requirements while maintaining excellent imaging quality.

[0006] Furthermore, by ensuring the optical lens meets the FOV (Field of View) requirement of 200° ≤ 210°, it is beneficial to give the optical lens a larger field of view, satisfying the need for a wide field of view. This results in a wider field of view, thereby expanding the shooting range of the optical lens and acquiring image information within a wider field of view. By ensuring the optical lens meets the FOV requirement of 1.3 ≤ FNO ≤ 1.45, it is possible to guarantee the optical lens has a large aperture characteristic, allowing for a high amount of light intake and resulting in clearer images.

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

[0008] The aforementioned camera module includes the aforementioned optical lens, which can meet the requirements of a wide field of view, high light intake, and miniaturization.

[0009] A third aspect of this application provides an electronic device, including: a housing; and the aforementioned camera module, wherein the camera module is mounted on the housing.

[0010] The aforementioned electronic device includes the aforementioned optical lens, which can meet the requirements of a wide field of view, high light intake, and miniaturization. Attached Figure Description

[0011] Figure 1 This is a schematic diagram of the structure 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 this application.

[0013] Figure 3 This is a schematic diagram of the structure of the optical lens disclosed in the second embodiment of this application.

[0014] Figure 4 These are the longitudinal spherical aberration curve, astigmatism curve, and distortion curve of the optical lens disclosed in the second embodiment of this application.

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

[0016] Figure 6 These are the longitudinal spherical aberration curve, astigmatism curve, and distortion curve of the optical lens disclosed in the third embodiment of this application.

[0017] Figure 7 This is a schematic diagram of the structure of the optical lens disclosed in the fourth embodiment of this application.

[0018] Figure 8 These are the longitudinal spherical aberration curve, astigmatism curve, and distortion curve of the optical lens disclosed in the fourth embodiment of this application.

[0019] Figure 9 This is a schematic diagram of the structure of the optical lens disclosed in the fifth embodiment of this application.

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

[0021] Figure 11 This is a schematic diagram of the structure of the optical lens disclosed in the sixth embodiment of this application.

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

[0023] Figure 13This is a schematic diagram of the structure of the optical lens disclosed in the seventh embodiment of this application.

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

[0025] Figure 15 This is a schematic diagram of the structure of the camera module according to an embodiment of this application.

[0026] Figure 16 This is a schematic diagram of the structure of an electronic device according to an embodiment of this application.

[0027] Explanation of key 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 surface S1, S3, S5, S7, S9, S11, image side surface S2, S4, S6, S8, S10, S12, aperture STO, filter IR, imaging plane IMG, camera module 200, image sensor 201, electronic device 300, housing 301. Detailed Implementation

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

[0029] Please see Figure 1 This application provides an optical lens 100 comprising six lenses with refractive power, arranged sequentially along the optical axis O from the object side to the image side: 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 sequentially from the object side of the first lens L1 through 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, and are ultimately imaged onto the imaging plane 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 L1 is convex near the optical axis O, and the image-side surface S2 of the first lens L1 is concave near the optical axis O; the object-side surface S3 of the second lens L2 is convex near the optical axis O, and the image-side surface S4 of the second lens L2 is concave near the optical axis O; the object-side surface S5 of the third lens L3 is convex near the optical axis O, and the image-side surface S6 of the third lens L3 is convex near the optical axis O; the object-side surface S7 of the fourth lens L4 is convex near the optical axis O, and the image-side surface S8 of the fourth lens L4 is convex near the optical axis O; the object-side surface S9 of the fifth lens L5 is concave near the optical axis O, and the image-side surface S10 of the fifth lens L5 is concave near the optical axis O; the object-side surface S11 of the sixth lens L6 is convex near the optical axis O, and the image-side surface S12 of the sixth lens L6 is convex near the optical axis O.

[0032] The aforementioned optical lens 100, by setting the first lens L1 to have negative refractive power, and its object-side surface S1 and image-side surface S2 to be convex and concave near the optical axis O respectively, facilitates coupling as much wide-field light as possible into the optical lens 100, improving the relative illumination at the edge field of view; the second lens L2, having negative refractive power, and its object-side surface S3 and image-side surface S4 to be convex and concave near the optical axis O respectively, further slows down the entry of light into the optical lens 100, while simultaneously causing the light to move towards the imaging surface of the optical lens 100. The first lens L1 ensures a smooth transition between the light rays exiting and entering the second lens L2, reducing the sensitivity of the optical lens 100 and improving its assembly yield. The third lens L3 has positive refractive power, with its object-side surface S5 and image-side surface S6 both convex near the optical axis O. Combined with the negative refractive power of the second lens L2, this shifts the light rays towards the imaging surface of the optical lens 100, effectively controlling chromatic aberration and reducing the risk of color cast, thus contributing to improved image quality. The imaging quality of the optical lens 100; the fourth lens L4 has positive refractive power, and its object-side surface S7 and image-side surface S8 are both convex near the optical axis O; the fifth lens L5 has negative refractive power, and its object-side surface S9 and image-side surface S10 are both concave near the optical axis O. The fourth lens L4, in combination with the fifth lens L5, further controls the chromatic aberration of the optical lens 100, can converge the light emitted from the third lens L3 and make the light transition smoothly, and can also correct various aberrations introduced by the front optical lens 100, as well as... To reduce light loss in each field of view and improve relative illumination, the imaging quality of the optical lens 100 can be improved. 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 effectively suppresses the angle at which edge fields of view are incident 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, achieving good imaging quality while meeting miniaturization requirements.

[0033] Furthermore, the optical lens 100 satisfies the following relationship: 200° ≤ FOV ≤ 210°; for example, FOV can be 200°, 201°, 202°, ​​203°, 204°, 205°, 206°, 207°, 208°, 209°, 210°, etc. Here, FOV is the maximum field of view of the optical lens 100. By ensuring that the optical lens 100 satisfies the above relationship, it is beneficial to have a larger field of view, meeting the requirement for a wide field of view. The optical lens 100 has a wider field of view, thereby expanding the shooting 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 can be 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. Here, FNO is the aperture number of the optical lens 100. By ensuring that the optical lens 100 satisfies the above relationship, it can be guaranteed that the optical lens 100 has a large aperture characteristic, enabling it to capture a large amount of light and resulting in a clearer image.

[0035] In some embodiments, when the optical lens 100 is applied to electronic devices such as drones, mobile phones, tablets, smartwatches, and thumb cameras, the first lens L1 can be made of glass, while 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 reduce the impact of temperature on the 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 is understood that when the optical lens 100 is applied to 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, thereby enabling the optical lens 100 to achieve good image quality while also reducing the impact of temperature on the lenses. Of course, among the multiple lenses of the optical lens 100, some lenses can be made of glass and some can be made of plastic. This ensures that while reducing the impact of temperature on the lens to achieve better image quality, it also reduces the processing cost and weight of the lens, thereby reducing the processing cost and overall weight of the optical lens 100.

[0036] In some embodiments, spherical lenses are considered to have the advantages of simple manufacturing process and low production cost, and the ability to flexibly design the surface shape of the lens to improve the imaging resolution of the optical lens 100. Aspherical lenses allow for more flexible design of the object side or image side of the lens, enabling the lens to effectively solve problems such as unclear imaging, distorted field of view, or narrow field of view even when the lens is small and thin. Furthermore, the optical lens 100 does not need to have too many lenses to achieve good image quality, which is beneficial for 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 manufacturability of each lens and facilitates surface design, but also allows for more flexible design of the object-side or image-side surfaces of the lenses. This enables each lens to effectively solve problems such as unclear imaging, distorted field of view, or narrow field of view even with smaller and thinner dimensions. Furthermore, the optical lens 100 does not require an excessive number of lenses to achieve good image quality and high resolution, while also helping to shorten the length of the optical lens 100. It is understood that in other embodiments, the surfaces of each lens in the optical lens 100 can be all spherical, all aspherical, or any combination of spherical and aspherical surfaces, depending on actual needs. Therefore, this embodiment does not impose specific limitations.

[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 a field stop, or 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 stop STO divides the optical lens 100 into a front lens group and a rear lens group, which is beneficial for the rational distribution of the refractive power of the optical lens 100, thereby enabling the optical lens 100 to have both a large field of view and a large aperture. It is understood that in other embodiments, the aperture stop STO may also be disposed between other lenses, and the setting may be adjusted according to the actual situation. This embodiment does not specifically limit this.

[0038] In some embodiments, the optical lens 100 further includes an infrared filter IR, 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 infrared filter IR may be an infrared cut-off filter to filter out infrared light and allow visible light to pass through, making the image more consistent with the visual experience of the human eye, thereby improving image quality. In other embodiments, the infrared filter IR may be an infrared bandpass filter, which can filter out light of other wavelengths such as visible light, allowing infrared light to pass through and reflecting 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 image quality. It is understood that the infrared filter IR may be made of plastic, optical glass with coating, or other materials, and can be selected according to actual needs. This embodiment does not impose specific limitations.

[0039] In some embodiments, the optical lens 100 satisfies the following relationship: 12 ≤ TTL / F ≤ 13.5; for example, TTL / F can be 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. Wherein, TTL is the distance on the optical axis O from the object-side surface S1 of the first lens L1 to the imaging surface IMG of the optical lens 100, and F is the effective focal length of the optical lens 100. By satisfying the above relationship, the optical lens 100 achieves miniaturization 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 can be 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. Wherein, ImgH is half the image height corresponding to the maximum field of view of the optical lens 100. By ensuring that the optical lens 100 satisfies the above relationship, it is beneficial to achieve high-resolution imaging quality and to enable the optical lens 100 to capture images over a wider field of view.

[0041] In some embodiments, the optical lens 100 satisfies the following relationship: 142° ≤ FOV / FNO ≤ 158°; for example, FOV / FNO can be 142°, 143°, 144°, 145°, 146°, 147°, 148°, 149°, 150°, 151°, 152°, 153°, 154°, 155°, 156°, 157°, 158°, etc. By making the optical lens 100 satisfy the above relationship, the optical lens 100 possesses both the characteristics of 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 can be -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. Here, F1 is the effective focal length of the first lens L1. By making the optical lens 100 satisfy the above relationship, the first lens L1 can have appropriate negative refractive power, which helps to make the change in the refraction angle of the incident light more gradual, avoiding excessive aberrations caused by overly strong refraction changes. Simultaneously, it allows more light to enter the rear optical lens 100, 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 can be -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. Here, F2 is the effective focal length of the second lens L2. By making the optical lens 100 satisfy the above relationship, the second lens L2 can have an appropriate negative refractive power, which helps to slow down the light entering the optical lens 100 and simultaneously shifts the light towards the imaging plane IMG of the optical lens 100, ensuring a better transition between the light emanating 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 can be 3.9, 4, 4.1, 4.2, 4.3, etc. Here, F3 is the effective focal length of the third lens L3. By making the optical lens 100 satisfy the above relationship, the third lens L3 can have appropriate positive refractive power, which helps to mitigate the tendency of light refraction and reduce the height of light rays, resulting in a smooth transition of light path. Simultaneously, it 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 can be -2, -1.9, -1.8, -1.7, -1.6, -1.5, -1.4, -1.3, -1.2, -1.1, -1, etc. Here, R3 is the radius of curvature of the object-side surface S3 of the second lens L2 at the optical axis O. By making the optical lens 100 satisfy the above relationship, the second lens L2 can provide sufficient negative refractive power to the optical lens 100, which is beneficial for shortening the total optical length of the optical lens 100. At the same time, the refractive power of the second lens L2 is not too strong, which is beneficial for correcting the spherical aberration of the optical lens 100.

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

[0047] In some embodiments, the optical lens 100 satisfies the following relationship: 0.6 ≤ SAGS3 / CT2 ≤ 1.3; for example, SAGS3 / CT2 can be 0.6, 0.7, 0.8, 0.9, 1, 1.1, 1.2, 1.3, etc. Wherein, 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. By ensuring that the optical lens 100 satisfies the above relationship, it is beneficial to reasonably control the refractive power and thickness of the second lens L2 at various points perpendicular to the optical axis O, avoiding the second lens L2 being too thick or too thin, reducing the incident angle of light on the object-side surface S3 of the second lens L2, and reducing 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 can be -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. Here, R5 is the radius of curvature of the object-side surface S5 of the third lens L3 at the optical axis O, and R6 is the radius of curvature of the image-side surface S6 of the third lens L3 at the optical axis O. By ensuring that the optical lens 100 satisfies the above relationship, the shape of the third lens L3 is reasonably controlled, comprehensively balancing the spherical aberration, chromatic aberration, and field curvature of the optical lens 100, reducing the risk of ghosting, and improving the resolving power of the optical lens 100. Simultaneously, it also helps to reduce the manufacturing difficulty of the third lens L3.

[0049] In some embodiments, the optical lens 100 satisfies the following relationship: 4.4 ≤ TTL / CT3 ≤ 5.4; for example, TTL / CT3 can be 4.4, 4.5, 4.6, 4.7, 4.8, 4.9, 5, 5.1, 5.2, 5.3, 5.4, etc. Wherein, CT3 is the thickness of the third lens L3 along the optical axis O. By making the optical lens 100 satisfy the above relationship, it is beneficial to make the structure of the optical lens 100 compact, shorten the total optical length of the optical lens 100, and achieve miniaturization of the optical lens 100 design.

[0050] In some embodiments, the optical lens 100 satisfies the following relationship: 1 ≤ SD6 / SD7 ≤ 1.25; for example, SD6 / SD7 can be 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. Wherein, SD6 is half the maximum effective aperture of the image-side surface S6 of the third lens L3, and SD7 is half the maximum effective aperture of the object-side surface S7 of the fourth lens L4. By making the optical lens 100 satisfy the above relationship, the difference between half of the maximum effective aperture of the two lenses can be minimized, reducing the aperture step difference between the two lenses, thereby guiding the light to transition from the third lens L3 to the fourth lens L4 more smoothly and better.

[0051] In some embodiments, the optical lens 100 satisfies the following relationship: 1.1 ≤ F4 / CT4 ≤ 1.21; for example, F4 / CT4 can be 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. Here, F4 is the effective focal length of the fourth lens L4, and CT4 is the thickness of the fourth lens L4 along the optical axis O. By ensuring the optical lens 100 satisfies the above relationship, it is beneficial to rationally configure the refractive power and thickness of the fourth lens L4, thereby effectively controlling the incident angle of light in the optical lens 100, reducing the sensitivity of the optical lens 100, correcting aberrations generated by the optical lens 100, and ultimately 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 can be -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. Wherein, F5 is the effective focal length of the fifth lens L5, and CT5 is the thickness of the fifth lens L5 along the optical axis O. By ensuring that the optical lens 100 satisfies the above-mentioned relationship, it is beneficial to rationally 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 thus improving the imaging quality of the optical lens 100.

[0053] In some embodiments, the fourth lens L4 and the fifth lens L5 are combined to form a cemented lens group with negative refractive power, and the image-side surface S8 of the fourth lens L4 and the object-side surface S9 of the fifth lens L5 are cemented surfaces. By combining the fourth lens L4 and the fifth lens L5 into a cemented lens group with negative refractive power, it is beneficial to correct chromatic aberration and balance various aberrations, enabling the optical lens 100 to have high resolution, effectively reducing tolerance sensitivity, and improving the imaging quality of the optical lens 100; at the same time, it is beneficial to shorten the overall optical length of the optical lens 100, which is conducive to miniaturization design.

[0054] In some embodiments, the optical lens 100 satisfies the following relationship: -20 ≤ F45 / F ≤ -7; for example, F45 / F can be -20, -19, -18, -17, -16, -15, -14, -13, -12, -11, -10, -9, -8, -7, etc. Here, F45 is the combined effective focal length of the fourth lens L4 and the fifth lens L5. By ensuring that the optical lens 100 satisfies the above relationship and rationally configuring the focal length ratio of the cemented lens group formed by the fourth lens L4 and the fifth lens L5, it is beneficial to reduce higher-order aberrations and improve 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) can be -2.4, -2.3, -2.2, -2.1, -2, -1.9, -1.8, etc. Here, 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 making the optical lens 100 satisfy 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 plane IMG of the optical lens 100, and at the same time, it can balance various aberrations of the optical lens 100, thereby 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 L6 on the optical axis O, and ET6 is the distance from the maximum effective aperture of the object side surface S11 of the sixth lens L6 to the maximum effective aperture of the image side surface S12 of the sixth lens L6 along the optical axis O. By making the optical lens 100 satisfy the above relationship, the edge thickness and center thickness of the sixth lens L6 are within a reasonable range, the surface shape change of the sixth lens L6 is small, which can effectively control the aberrations existing in the optical lens 100, and at the same time, it also helps to reduce the manufacturing difficulty of the sixth lens L6.

[0057] In some embodiments, the optical lens 100 satisfies the following relationship: 2 ≤ F6 / F ≤ 2.3; for example, F6 / F can be 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 L6. By making the optical lens 100 satisfy the above relationship, the sixth lens L6 can have appropriate refractive power, which is beneficial to suppress the angle of the edge field of view incident on the imaging plane 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.

[0058] In some embodiments, the optical lens 100 satisfies the following relationship: 7 ≤ TTL / ImgH ≤ 7.2; for example, TTL / ImgH can be 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, it is beneficial to limit the total optical length of the optical lens 100, enabling the optical lens 100 to achieve a miniaturized design and meet the requirements for lightweight UAV structures.

[0059] In some embodiments, the optical lens 100 satisfies the following relationship: 1.7 ≤ TTL / ΣCT ≤ 1.75; for example, TTL / ΣCT can be 1.7, 1.71, 1.72, 1.73, 1.74, 1.75, etc. Here, 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. By ensuring that the optical lens 100 satisfies the above relationship, it is beneficial to reduce the overall optical length and volume of the optical lens 100, maintain the miniaturization of the optical lens 100, and control the weight of the optical lens 100.

[0060] In some embodiments, the optical lens 100 satisfies the following relationship: 2.1 ≤ TTL / SD1 ≤ 2.3; for example, TTL / SD1 can be 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. Wherein, SD1 is half the maximum effective aperture of the object-side surface S1 of the first lens L1. By making the optical lens 100 satisfy the above relationship, it is beneficial to make the optical lens 100 meet the requirements of miniaturization.

[0061] In some embodiments, the optical lens 100 satisfies the following relationship: 7.3 ≤ TTL / BFL ≤ 8; for example, TTL / BFL can be 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 on the optical axis O from the image-side surface S12 of the sixth lens L6 to the imaging surface IMG of the optical lens 100. By making the optical lens 100 satisfy the above relationship, the back focal length of the optical lens 100 can be shortened, avoiding excessive size of the optical lens 100, which is beneficial for meeting the requirements of lightweight UAV structure.

[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) can be -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 L3, VD4 is the Abbe number of the fourth lens L4, R7 is the radius of curvature of the object-side surface S7 of the fourth lens L4 at the optical axis O, R8 is the radius of curvature of the image-side surface S8 of the fourth lens L4 at the optical axis O, and R9 is the radius of curvature of the object-side surface S9 of the fifth lens L5 at the optical axis O. By ensuring that the optical lens 100 satisfies the above-mentioned 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 can be 4, 4.05, 4.1, 4.15, 4.2, 4.25, 4.3, etc. Here, 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, making the total optical length of the entire optical lens 100 less than 8mm.

[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, while ensuring good imaging quality, the ghosting of the optical lens 100 can be effectively controlled.

[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) can be 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 making the optical lens 100 satisfy the above relationship, the third lens L3 can have an appropriate surface shape, which helps to reduce the tendency of light deflection and lower the light height, making the light path transition smoothly. At the same time, it helps to reduce the difficulty of correcting spherical aberration and field curvature, and thus improves 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 making the optical lens 100 satisfy the above relationship, the fourth lens L4 can have an appropriate positive refractive power to converge the light rays emitted from the third lens L3 and make the light rays transition smoothly.

[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 making the optical lens 100 satisfy the above relationship, the fifth lens L5 can have appropriate negative refractive power, which can correct various aberrations caused by the front optical lens 100, 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.

[0068] In some embodiments, the optical lens 100 satisfies the following relationship: 3 ≤ R1 / R2 ≤ 3.7; for example, R1 / R2 can be 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. Wherein, R2 is the radius of curvature of the image-side surface S2 of the first lens L1 at the optical axis O. By ensuring the optical lens 100 satisfies the above relationship, the shape of the first lens L1 is reasonably controlled, comprehensively balancing the spherical aberration, chromatic aberration, and field curvature of the optical lens 100, reducing the risk of ghosting, and improving the resolving power of the optical lens 100. Simultaneously, it also helps to reduce the manufacturing difficulty of the first lens L1.

[0069] In some embodiments, the optical lens 100 satisfies the following relationship: 2.3 ≤ R3 / R4 ≤ 3.2; for example, R3 / R4 can be 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 the above relationship, the shape of the second lens L2 can be reasonably controlled, comprehensively balancing the spherical aberration, chromatic aberration, and field curvature of the optical lens 100, reducing the risk of ghosting, and improving the resolving power of the optical lens 100. Simultaneously, it also helps to reduce the manufacturing difficulty of the second lens L2.

[0070] In some embodiments, the optical lens 100 satisfies the following relationship: -2.5 ≤ R7 / R8 ≤ -2.1; for example, R7 / R8 can be -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 the above relationship, the shape of the fourth lens L4 is reasonably controlled, comprehensively balancing the spherical aberration, chromatic aberration, and field curvature of the optical lens 100, reducing the risk of ghosting, and improving the resolving power of the optical lens 100. Simultaneously, it also helps to reduce the manufacturing difficulty of the fourth lens L4.

[0071] In some embodiments, the optical lens 100 satisfies the following relationship: -0.5 ≤ R9 / R10 ≤ -0.4; for example, R9 / R10 can be -0.5, -0.49, -0.48, -0.47, -0.46, -0.45, -0.44, -0.43, -0.42, -0.41, -0.4, etc. Here, R10 is the radius of curvature of the image-side surface S10 of the fifth lens L5 at the optical axis O. By ensuring that the optical lens 100 satisfies the above relationship, the shape of the fifth lens L5 is reasonably controlled, comprehensively balancing the spherical aberration, chromatic aberration, and field curvature of the optical lens 100, reducing the risk of ghosting, and improving the resolving power of the optical lens 100. Simultaneously, it also helps to reduce the manufacturing difficulty of the fifth lens L5.

[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 making the optical lens 100 satisfy the above relationship, the shape of the sixth lens L6 is reasonably controlled, the spherical aberration, chromatic aberration, and field curvature of the optical lens 100 are comprehensively balanced, the risk of ghosting is reduced, the resolving power of the optical lens 100 is improved, and the manufacturing difficulty of the sixth lens L6 is also reduced.

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

[0074]

[0075] Where Z is the distance from the corresponding point on the aspherical surface to the plane tangent to the vertex of the surface, c is the curvature of the vertex of the aspherical surface, c = 1 / Y, Y is the radius of curvature (i.e., the paraxial curvature c is the reciprocal of the radius of Y in Table 1a), r is the distance from any point on the aspherical surface to the optical axis O, k is the conic constant, and Ai is the coefficient corresponding to the i-th higher-order term in the aspherical 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 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, and a filter IR arranged sequentially along the optical axis O from the object side to the image side.

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

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

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

[0083] Table 1a

[0084]

[0085] Table 1b

[0086]

[0087] Please see Figure 2 (A) in the middle Figure 2 Figure (A) shows longitudinal spherical aberration diagrams of the optical lens 100 in the first embodiment at wavelengths of 650.0000 nm, 610.0000 nm, 555.0000 nm, 510.0000 nm, 470.0000 nm, and 435.0000 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 diagram, the optical lens 100 in the first embodiment has a better spherical aberration value, indicating that the optical lens 100 in this embodiment has better imaging quality. Please refer to [link / reference]. Figure 2 (B) in the middle Figure 2 Figure (B) shows an 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 shift in mm, and the vertical axis along the Y-axis represents the field of view in degrees. In the astigmatism diagram, T represents the curvature of the imaging plane IMG in the sub-arc direction, and S represents the curvature of the imaging plane IMG in the sagittal direction. Figure 2 As can be seen in (B) above, the astigmatism of optical lens 100 is well compensated at this wavelength. Please refer to [link / reference]. Figure 2 (C) in the middle, Figure 2 Figure (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 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), the distortion of the optical lens 100 is well corrected at this wavelength.

[0088] Second Embodiment

[0089] The structural schematic diagram of the optical lens 100 disclosed in the second embodiment of this application is shown below. Figure 3 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, and a filter IR arranged sequentially along the optical axis O from the object side to the image side.

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

[0092] Other parameters in the second embodiment are given in Table 2a below, and the definitions of each parameter can be derived from the description of the foregoing embodiments, and will not be repeated here. It is understood that the units for the Y-radius, thickness, and effective focal length in Table 2a are all mm. Furthermore, 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 L2, the third lens L3, the fourth lens L4, the fifth lens L5 and the sixth lens L6 are all aspherical surfaces. Table 2b gives the conic constant k and higher-order coefficients A4, A6, A8, A10, A12, A14 and A16 that can be used for the aspherical mirrors in the second embodiment.

[0094] Table 2a

[0095]

[0096]

[0097] Table 2b

[0098]

[0099] Please see Figure 4 ,Depend on Figure 4 As can be seen from (A) the longitudinal spherical aberration diagram, (B) the astigmatism diagram, and (C) the distortion curve diagram, in the second embodiment, the longitudinal 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) in the middle Figure 2(B) in the middle Figure 2 The content described in (C) will not be repeated here.

[0100] Third Embodiment

[0101] 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, and a filter IR arranged sequentially along the optical axis O from the object side to the image side.

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

[0104] Other parameters in the third embodiment are given in Table 3a below, and the definitions of each parameter can be derived from the description of the foregoing embodiments, and will not be repeated here. It is understood that the units for the Y-radius, thickness, and effective focal length in Table 3a are all mm. Furthermore, 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 L2, the third lens L3, the fourth lens L4, the fifth lens L5 and the sixth lens L6 are all aspherical surfaces. Table 3b gives the conic constant k and higher-order coefficients A4, A6, A8, A10, A12, A14 and A16 that can be used for the aspherical mirrors in the third embodiment.

[0106] Table 3a

[0107]

[0108] Table 3b

[0109]

[0110] Please see Figure 6 ,Depend on Figure 6 As can be seen from (A) the longitudinal spherical aberration diagram, (B) the astigmatism diagram, and (C) the distortion curve diagram, in the third embodiment, the longitudinal 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) in the middle Figure 2 (B) in the middle Figure 2 The content described in (C) will not be repeated here.

[0111] Fourth embodiment

[0112] 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, and a filter IR arranged sequentially along the optical axis O from the object side to the image side.

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

[0115] The other parameters in the fourth embodiment are given in Table 4a below, and the definitions of each parameter can be derived from the descriptions of the foregoing embodiments, and will not be repeated here. It is understood that the units for the Y-radius, thickness, and effective focal length in Table 4a are all mm. Furthermore, 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 L2, the third lens L3, the fourth lens L4, the fifth lens L5 and the sixth lens L6 are all aspherical surfaces. Table 4b gives the conic constant k and higher-order coefficients A4, A6, A8, A10, A12, A14 and A16 that can be used for the aspherical mirrors in the first embodiment.

[0117] Table 4a

[0118]

[0119] Table 4b

[0120]

[0121]

[0122] Please see Figure 8 ,Depend on Figure 8 As can be seen from (A) the longitudinal spherical aberration diagram, (B) the astigmatism diagram, and (C) the distortion curve diagram, in the fourth embodiment, the longitudinal 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) in the middle Figure 2 (B) in the middle Figure 2 The content described in (C) will not be repeated here.

[0123] Fifth Embodiment

[0124] The structural schematic diagram of the optical lens 100 disclosed in the fifth embodiment of this application is shown below. Figure 9 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, and a filter IR arranged sequentially along the optical axis O from the object side to the image side.

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

[0127] Other parameters in the fifth embodiment are given in Table 5a below, and the definitions of each parameter can be derived from the descriptions of the foregoing embodiments, and will not be repeated here. It is understood that the units for the Y-radius, thickness, and effective focal length in Table 5a are all mm. Furthermore, 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 L2, the third lens L3, the fourth lens L4, the fifth lens L5 and the sixth lens L6 are all aspherical surfaces. Table 5b gives the conic constant k and higher-order coefficients A4, A6, A8, A10, A12, A14 and A16 that can be used for the aspherical mirrors in the fifth embodiment.

[0129] Table 5a

[0130]

[0131]

[0132] Table 5b

[0133]

[0134] Please see Figure 10 ,Depend on Figure 10 As can be seen from (A) the longitudinal spherical aberration diagram, (B) the astigmatism diagram, and (C) the distortion curve diagram, in the fifth embodiment, the longitudinal 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) in the middle Figure 2 (B) in the middle Figure 2 The content described in (C) will not be repeated here.

[0135] Sixth Embodiment

[0136] The structural schematic diagram of the optical lens 100 disclosed in the sixth embodiment of this application is shown below. Figure 11 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, and a filter IR arranged sequentially along the optical axis O from the object side to the image side.

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

[0139] Other parameters in the sixth embodiment are given in Table 6a below, and the definitions of each parameter can be derived from the descriptions of the foregoing embodiments, and will not be repeated here. It is understood that the units for the Y-radius, thickness, and effective focal length in Table 6a are all mm. Furthermore, 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 L2, the third lens L3, the fourth lens L4, the fifth lens L5 and the sixth lens L6 are all aspherical surfaces. Table 6b gives the conic constant k and higher-order coefficients A4, A6, A8, A10, A12, A14 and A16 that can be used for the aspherical mirrors in the sixth embodiment.

[0141] Table 6a

[0142]

[0143] Table 6b

[0144]

[0145] Please see Figure 12 ,Depend on Figure 12 As can be seen from (A) the longitudinal spherical aberration diagram, (B) the astigmatism diagram, and (C) the distortion curve diagram, in the sixth embodiment, the longitudinal 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 12 (A) Figure 12 (B) and Figure 12 The wavelengths corresponding to the curves in (C) can be referred to in the first embodiment regarding... Figure 2 (A) in the middle Figure 2 (B) in the middle Figure 2 The content described in (C) will not be repeated here.

[0146] Seventh Embodiment

[0147] The structural schematic diagram of the optical lens 100 disclosed in the seventh embodiment of this application is shown below. Figure 13 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, and a filter IR arranged sequentially along the optical axis O from the object side to the image side.

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

[0150] Other parameters in the seventh embodiment are given in Table 7a below, and the definitions of each parameter can be derived from the descriptions of the foregoing embodiments, and will not be repeated here. It is understood that the units for the Y-radius, thickness, and effective focal length in Table 7a are all mm. Furthermore, 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 L2, the third lens L3, the fourth lens L4, the fifth lens L5 and the sixth lens L6 are all aspherical surfaces. Table 7b gives the conic constant k and higher-order coefficients A4, A6, A8, A10, A12, A14 and A16 that can be used for the aspherical mirrors in the seventh embodiment.

[0152] Table 7a

[0153]

[0154] Table 7b

[0155]

[0156]

[0157] Please see Figure 14 ,Depend on Figure 14 As can be seen from (A) the longitudinal spherical aberration diagram, (B) the astigmatism diagram, and (C) the distortion curve diagram, in the seventh embodiment, the longitudinal 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 14 (A) Figure 14 (B) and Figure 14 The wavelengths corresponding to the curves in (C) can be referred to in the first embodiment regarding... Figure 2 (A) in the middle Figure 2 (B) in the middle Figure 2 The content 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) of the optical lenses 100 in the first to seventh embodiments. 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] Please see Figure 15 This application also provides a camera module 200. The camera module 100 includes an optical lens 100 and an image sensor 201 as described in any of the above embodiments. The image sensor 201 is disposed on the image side of the optical lens 100. The image sensor 201 may be a complementary metal-oxide-semiconductor (CMOS) image sensor or a charge-coupled device (CCD).

[0163] Please see Figure 16 This application also provides an electronic device 300. The electronic device 300 includes a housing 301 and a camera module 200, with the camera module 200 mounted on the housing 301. The electronic device 300 in this application includes, but is not limited to, imaging-enabled electronic devices such as drones, mobile phones, tablets, smartwatches, thumb cameras, in-vehicle devices, monitors, dashcams, laptops, e-book readers, portable multimedia players (PMPs), portable telephones, video phones, mobile medical devices, and wearable devices.

[0164] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this application and are not intended to limit it. Although this application has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of this application without departing from the spirit and scope of the technical solutions of this application.

Claims

1. An optical lens characterized in that, There are six refractive lenses in total, arranged sequentially from the object side to the image side along the optical axis: The first lens has negative refractive power, its object side is convex near the optical axis, and its image side is concave near the optical axis; The second lens has negative refractive power, its object side is convex near the optical axis, and its image side is concave near the optical axis; The third lens has positive refractive power, and its object side is convex near the optical axis, and its image side is convex near the optical axis. The fourth lens has positive refractive power, and its object side is convex near the optical axis, and its image side is also convex near the optical axis. The fifth lens has negative refractive power; its object side is concave near the optical axis, and its image side is also concave near the optical axis. The sixth lens has positive refractive power; its object side is convex near the optical axis, and its image side 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 as described in claim 1, characterized in that, 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 on the optical axis from the object side of the first lens to the imaging surface of the optical lens, 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 of the optical lens.

3. The optical lens as described in claim 1, characterized in that, 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; Wherein, 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 as described in claim 1, characterized in that, 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 of the second lens at the optical axis, R4 is the radius of curvature of the image side of the second lens at the optical axis, SAGS3 is the distance from the intersection of the object side of the second lens and the optical axis to the maximum effective aperture of the object side 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 as described in claim 1, characterized in that, 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; Wherein, 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, TTL is the distance from the object side of the first lens to the imaging surface of the optical lens at the optical axis, CT3 is the thickness of the third lens at the optical axis, SD6 is half of the maximum effective aperture of the image side of the third lens, and SD7 is half of the maximum effective aperture of the object side of the fourth lens.

6. The optical lens as described in claim 1, characterized in that, 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; Wherein, 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 and fifth lenses, 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 as described in claim 1, characterized in that, 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; Wherein, F is the effective focal length of the optical lens, F6 is the effective focal length of the sixth lens, R11 is the radius of curvature of the object side of the sixth lens at the optical axis, R12 is the radius of curvature of the image side 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 of the sixth lens to the maximum effective aperture of the image side of the sixth lens along the optical axis.

8. The optical lens as described in claim 1, characterized in that, 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 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, 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 the maximum effective aperture of the object side of the first lens, and BFL is the distance on the optical axis from the image side of the sixth lens to the imaging surface of the optical lens.

9. A camera module, characterized in that, include: The optical lens as described in any one of claims 1 to 8; and An image sensor is located 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 mounted on the housing.

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