Optical lens and electronic equipment

Abstract

The invention discloses an optical lens and electronic equipment. The optical lens sequentially comprises a first lens with negative focal power from a first side to a second side along an optical axis, a second lens with negative focal power, a third lens with negative focal power, a fourth lens with negative focal power and a fifth lens with negative focal power, the second lens has negative focal power; the third lens has positive focal power, and the first side surface and the second side surface of the third lens are convex surfaces; the fourth lens has negative focal power; the fifth lens has focal power; the sixth lens has positive focal power; the seventh lens has positive focal power; the number of lenses with focal power in the optical lens is seven; the optical lens further comprises a diaphragm arranged between the third lens and the fourth lens. The optical lens satisfies the following conditions:-0.9 < = F1 / F3 < =-0.5 and 1.7 < = F3 / F < = 2.8. Wherein F1 is the focal length of the first lens; f3 is the focal length of the third lens; f is the total effective focal length of the optical lens.

Description

Technical Field

[0001] This application relates to the field of optical elements, and in particular to an optical lens and an electronic device. Background Art

[0002] In recent years, with the continuous progress of science and technology and the continuous development of society, the market has higher and higher requirements for optical lenses applied to various scenarios; especially with the development of intelligent driving technology, vehicle-mounted lenses such as lidar lenses, as key components for obtaining external information, have an increasing demand.

[0003] However, in order to meet safety requirements and obtain a larger detection range, most of the current lidar lenses on the market will choose to increase the field of view angle, which also makes these lenses large in size (relatively large overall optical length) and small in aperture (low light transmittance), and is not conducive to meeting the requirements of various terminal devices. Summary of the Invention

[0004] Although the existing lidar lenses have a large field of view angle, they have problems of large size and small aperture. This application provides an optical lens and an electronic device, which can increase the light input while achieving a small size, and meet the requirements of various terminal devices, such as cameras, projection lamps or lidars.

[0005] The first aspect of this application provides such an optical lens, which sequentially includes, along the optical axis from the first side to the second side: a first lens with a negative focal power, the first side of the first lens is convex, and the second side of the first lens is concave; a second lens with a negative focal power; a third lens with a positive focal power, both the first side and the second side of the third lens are convex; a fourth lens with a negative focal power; a fifth lens with a focal power; a sixth lens with a positive focal power; a seventh lens with a positive focal power; the number of lenses with focal power in the optical lens is seven; the optical lens further includes a diaphragm disposed between the third lens and the fourth lens; the optical lens satisfies: -0.9 ≤ F1 / F3 ≤ -0.5 and 1.7 ≤ F3 / F ≤ 2.8; where, F1 is the focal length of the first lens; F3 is the focal length of the third lens; F is the total effective focal length of the optical lens.

[0006] With such a setting, the optical lens of the present application adopts seven lenses with optical power and satisfies the relational expressions -0.9 ≤ F1 / F3 ≤ -0.5 and 1.7 ≤ F3 / F ≤ 2.8. On the one hand, the first lens is a negative lens with a convex shape facing the object side and having a diverging effect on light rays, which is beneficial for collecting light rays in a large field of view, increasing the light flux, and diffusing the light rays collected by the first lens to the image side of the first lens to achieve imaging with a large field of view angle. At the same time, the third lens is a positive lens with a biconvex shape and having an obvious converging effect on light rays, which can appropriately smooth the light rays from the second lens, reduce the divergence degree, and enable the light rays to smoothly transition to the subsequent lenses. On the other hand, not only by defining the relationship between the focal length of the first lens and the focal length of the third lens, the light rays emerging from the third lens to the aperture are in a certain diverging state, which can increase the entrance pupil diameter of the optical lens. Thus, when the focal length is fixed, the f-number can be reduced, and further the light input of the optical lens can be increased. Moreover, by defining the relationship between the focal length of the third lens and the total effective focal length of the optical lens, the optical path required for the light rays emerging from the third lens to converge to the aperture is shorter, thereby reducing the overall optical length of the optical lens, which is beneficial for adapting to the requirements of various terminal devices, such as cameras, projection lamps, or lidar, etc.

[0007] It should be noted that the focal length F1 of the first lens is negative and the focal length F3 of the third lens is positive. If F1 / F3 < -0.9, the diverging state of the light rays emerging from the third lens to the aperture is relatively weak, which is not conducive to increasing the entrance pupil diameter of the optical lens. If F1 / F3 > -0.5, the diverging state of the light rays emerging from the third lens to the aperture is too strong, resulting in the light rays emerging from the third lens not being able to enter the fourth lens relatively smoothly, leading to excessive aberration and affecting the imaging quality. In addition, both the focal length F3 of the third lens and the total effective focal length F of the optical lens are positive. If F3 / F < 1.7, the focal length F3 of the third lens is too small, and the converging effect on light rays is too strong, which will reduce the entrance pupil diameter of the optical lens, thereby reducing the light flux of the optical lens. If F3 / F > 2.8, although the light rays can be quickly converged to the aperture, the light rays emerging from the third lens are relatively divergent, easily causing a large amount of aberration and increasing the difficulty of subsequent aberration correction.

[0008] According to an exemplary embodiment of the present application, the radius of curvature R9 of the first side surface of the fifth lens and the radius of curvature R10 of the second side surface of the fifth lens satisfy: 1 ≤ R9 / R10 ≤ 4.2.

[0009] According to an exemplary embodiment of the present application, the radius of curvature R1 of the first side surface of the first lens and the radius of curvature R3 of the first side surface of the second lens satisfy: 0.5 ≤ R1 / R3 ≤ 3.

[0010] According to an exemplary embodiment of the present application, the optical lens further includes a diaphragm disposed between the third lens and the fourth lens; the optical lens satisfies at least one of the following relational expressions: 0.24 ≤ L_stop / TTL ≤ 0.41 and -0.3 ≤ F3 / F4 ≤ -0.17; where L_stop is the distance between the diaphragm and the first side of the first lens on the optical axis; TTL is the total optical length of the optical lens; F3 is the focal length of the third lens; and F4 is the focal length of the fourth lens.

[0011] According to an exemplary embodiment of the present application, the focal length F1 of the first lens and the total effective focal length F of the optical lens satisfy: -1.9 ≤ F1 / F ≤ -1.2.

[0012] According to an exemplary embodiment of the present application, the focal length F2 of the second lens and the total effective focal length F of the optical lens satisfy: -9 ≤ F2 / F ≤ -5.

[0013] According to an exemplary embodiment of the present application, the focal length F6 of the sixth lens and the total effective focal length F of the optical lens satisfy: 2.3 ≤ F6 / F ≤ 12.

[0014] According to an exemplary embodiment of the present application, the focal length F7 of the seventh lens and the total effective focal length F of the optical lens satisfy: 2.7 ≤ F7 / F ≤ 15.

[0015] According to an exemplary embodiment of the present application, the optical lens satisfies at least one of the following relational expressions: 0.7 ≤ (F×θ) / D ≤ 1.1, 0.1 ≤ BFL / TTL ≤ 0.3, and 0.14 ≤ T_DIR / TTL ≤ 0.3; where F is the total effective focal length of the optical lens; θ is the radian value of the maximum field of view angle of the optical lens; D is the maximum clear aperture of the first side of the first lens corresponding to the maximum field of view angle of the optical lens; BFL is the back focal length of the optical lens; TTL is the total optical length of the optical lens; and T_DIR is the sum of the air gaps between all adjacent lenses on the optical axis in the optical lens.

[0016] According to an exemplary embodiment of the present application, the focal length F1 of the first lens and the focal length F2 of the second lens satisfy: -0.26 / mm ≤ 1 / F1 + 1 / F2 ≤ -0.17 / mm.

[0017] According to an exemplary embodiment of the present application, the optical lens satisfies at least one of the following relationships: 2.5 ≤ F5 / F ≤ 6, 0.09 / mm ≤ 1 / F6 + 1 / F7 ≤ 0.2 / mm, and -2.1 ≤ F4 / TTL ≤ -1.2; or, the optical lens satisfies at least one of the following relationships: F5 / F ≤ -25, 0.09 / mm ≤ 1 / F6 + 1 / F7 ≤ 0.2 / mm, and -2.1 ≤ F4 / TTL ≤ -1.2; where F5 is the focal length of the fifth lens; F is the total effective focal length of the optical lens; F6 is the focal length of the sixth lens; F7 is the focal length of the seventh lens; F4 is the focal length of the fourth lens; and TTL is the overall optical length of the optical lens.

[0018] According to an exemplary embodiment of the present application, the central thickness CT6 of the sixth lens on the optical axis and the central thickness CT7 of the seventh lens on the optical axis satisfy: 0.47 ≤ CT6 / CT7 ≤ 1.85.

[0019] According to an exemplary embodiment of the present application, the overall optical length TTL of the optical lens and the clear aperture D corresponding to the maximum field of view angle on the first side of the first lens satisfy: 1.4 ≤ TTL / D ≤ 2.2.

[0020] According to an exemplary embodiment of the present application, the first side of the second lens is convex, and the second side of the second lens is concave; the first side of the fourth lens is convex, and the second side of the fourth lens is concave.

[0021] According to an exemplary embodiment of the present application, the fifth lens has a positive optical power. The first side of the fifth lens is concave, and the second side of the fifth lens is convex, and the focal length F5 of the fifth lens and the total effective focal length F of the optical lens satisfy: 2.5 ≤ F5 / F ≤ 6; or, the fifth lens has a negative optical power. The first side of the fifth lens is concave, and the second side of the fifth lens is concave, and the focal length F5 of the fifth lens and the total effective focal length F of the optical lens satisfy: F5 / F ≤ -25.

[0022] According to an exemplary embodiment of the present application, both the first side and the second side of the sixth lens are convex; or, the first side of the sixth lens is convex, and the second side of the sixth lens is concave; or, the first side of the sixth lens is concave, and the second side of the sixth lens is convex.

[0023] According to an exemplary embodiment of the present application, both the first side and the second side of the seventh lens are convex; or, the first side of the seventh lens is convex, and the second side of the seventh lens is concave; or, the first side of the seventh lens is concave, and the second side of the seventh lens is convex.

[0024] According to an exemplary embodiment of the present application, the optical lens satisfies at least one of the following relationships: the optical lens satisfies at least one of the following relationships: -0.81 ≤ F1 / F3 ≤ -0.58, 1.9 ≤ F3 / F ≤ 2.5, 1 ≤ R9 / R10 ≤ 3.7, 0.55 ≤ R1 / R3 ≤ 2.7, 0.29 ≤ L_stop / TTL ≤ 0.36, -0.27 ≤ F3 / F4 ≤ -0.17, -1.7 ≤ F1 / F ≤ -1.4, -7.5 ≤ F2 / F ≤ -6, 2.5 ≤ F6 / F ≤ 11, 3 ≤ F7 / F ≤ 13, 0.8 ≤ (F×θ) / D ≤ 0.95, 0.11 ≤ BFL / TTL ≤ 0.28, 0.16 ≤ T_DIR / TTL ≤ 0.27, -0.23 / mm ≤ 1 / F1 + 1 / F2 ≤ -0.2 / mm, 3.0 ≤ F5 / F ≤ 5, 0.1 / mm ≤ 1 / F6 + 1 / F7 ≤ 0.19 / mm, -1.9 ≤ F4 / TTL ≤ -1.4, 0.5 ≤ CT6 / CT7 ≤ 1.7, and 1.6 ≤ TTL / D ≤ 1.9; or, the optical lens satisfies at least one of the following relationships: -0.81 ≤ F1 / F3 ≤ -0.58, 1.9 ≤ F3 / F ≤ 2.5, 1 ≤ R9 / R10 ≤ 3.7, 0.55 ≤ R1 / R3 ≤ 2.7, 0.29 ≤ L_stop / TTL ≤ 0.36, -0.27 ≤ F3 / F4 ≤ -0.17, -1.7 ≤ F1 / F ≤ -1.4, -7.5 ≤ F2 / F ≤ -6, 2.5 ≤ F6 / F ≤ 11, 3 ≤ F7 / F ≤ 13, 0.8 ≤ (F×θ) / D ≤ 0.95, 0.11 ≤ BFL / TTL ≤ 0.28, 0.16 ≤ T_DIR / TTL ≤ 0.27, -0.23 / mm ≤ 1 / F1 + 1 / F2 ≤ -0.2 / mm, -100 ≤ F5 / F ≤ -25, 0.1 / mm ≤ 1 / F6 + 1 / F7 ≤ 0.19 / mm, -1.9 ≤ F4 / TTL ≤ -1.4, 0.5 ≤ CT6 / CT7 ≤ 1.7, and 1.6 ≤ TTL / D ≤ 1.9; where F1 is the focal length of the first lens; F3 is the focal length of the third lens; F is the total effective focal length of the optical lens; R9 is the radius of curvature of the first side of the fifth lens; R10 is the radius of curvature of the second side of the fifth lens; R1 is the radius of curvature of the first side of the first lens; R3 is the radius of curvature of the first side of the second lens; L_stop is the distance between the aperture stop and the first side of the first lens on the optical axis; TTL is the overall optical length of the optical lens; F4 is the focal length of the fourth lens; F2 is the focal length of the second lens; F6 is the focal length of the sixth lens; F7 is the focal length of the seventh lens; θ is the radian value of the maximum field of view angle of the optical lens; D is the clear aperture on the first side of the first lens corresponding to the maximum field of view angle of the optical lens; BFL is the back focal length of the optical lens; T_DIR is the sum of the air gaps between all adjacent lenses in the optical lens on the optical axis; F5 is the focal length of the fifth lens; CT6 is the central thickness of the sixth lens on the optical axis; CT7 is the central thickness of the seventh lens on the optical axis..

[0025] The second aspect of the present application provides such an electronic device, including: any one of the above optical lenses; and at least one of an imaging element and a light source;

[0026] where the imaging element is configured to convert the optical image or optical information formed by the optical lens into an electrical signal;

[0027] where the light source is located on the second side of the optical lens, and the light emitted by the light source is projected to the first side of the optical lens after passing through the optical lens, and an image or an illuminated area is formed on the first side of the optical lens.

[0028] According to an exemplary embodiment of the present application, the electronic device is a lidar, a camera or a projection lamp.

[0029] According to an exemplary embodiment of the present application, the receiving end lens of the lidar is the optical lens, the first side of the optical lens is the object side, and the second side of the optical lens is the image side.

[0030] The third aspect of the present application provides such a vehicle, including: any one of the above electronic devices.

[0031] The fourth aspect of the present application provides an optical lens which sequentially includes, from the first side to the second side along the optical axis: a first lens with a negative optical power, the first side of the first lens being convex and the second side of the first lens being concave; a second lens with a negative optical power, the first side of the second lens being convex and the second side of the second lens being concave; a third lens with a positive optical power; a fourth lens with a negative optical power; a fifth lens with an optical power; a sixth lens with a positive optical power; a seventh lens with a positive optical power; the number of lenses with optical power in the optical lens is seven; the optical lens satisfies: -1.9 ≤ F1 / F ≤ -1.2 and -9 ≤ F2 / F ≤ -5; where F1 is the focal length of the first lens; F is the total effective focal length of the optical lens; and F2 is the focal length of the second lens.

[0032] With such a configuration, the optical lens of the present application uses seven lenses with optical power and satisfies the relational expressions -1.9 ≤ F1 / F ≤ -1.2 and -9 ≤ F2 / F ≤ -5. On the one hand, the first lens is a negative lens with a convex shape facing the object side and having a diverging effect on light rays, which is beneficial for collecting light rays in a large field of view, increasing the light flux, and diffusing the light rays collected by the first lens to the image side of the first lens to achieve imaging with a large field of view angle. At the same time, the second lens is a negative lens with a crescent shape and a concave shape facing the image side, which is beneficial for further diffusing the light rays in front, reducing the light ray angle, and enabling the light rays to transition smoothly. On the other hand, not only is the focal length of the first lens and the total effective focal length of the optical lens controlled within a reasonable range, but while achieving light collection in a large field of view through the first lens with a negative optical power, a smooth transition of the light beam is realized, which is convenient for reducing aberration and improving image quality. Moreover, the focal length of the second lens and the total effective focal length of the optical lens are controlled within a reasonable range, and the second lens with a negative optical power helps with the smooth transition of the light rays received from the first lens, corrects the aberration introduced by the first lens, and is convenient for improving image quality.

[0033] It should be noted that the focal length F1 of the first lens is negative, and this relational expression F1 / F plays a key role in the incident angle of the light rays of the lens and the initial convergence or divergence: if F1 / F < -1.9, it will lead to insufficient divergence ability of the light rays, thereby affecting the light transmission amount and imaging quality of the lens; if F1 / F > -1.2, it will lead to too strong a diverging effect on the light rays from the object-side space, and it is easy to introduce a large amount of aberration. In addition, the focal length F2 of the second lens is negative: if F2 / F < -9, it will lead to a weak diverging effect of the second lens on the light rays from the first lens, which is not conducive to aberration correction; if F2 / F > -5, it is not conducive to the smooth transition of the light rays received by the first lens, and it is easy to introduce more aberration.

[0034] The fifth aspect of the present application provides an optical lens which sequentially includes, from the first side to the second side along the optical axis: a first lens with a negative optical power, the first side surface of the first lens is convex, and the second side surface of the first lens is concave; a second lens with a negative optical power; a third lens with a positive optical power, both the first side surface and the second side surface of the third lens are convex; a fourth lens with a negative optical power, the first side surface of the fourth lens is convex, and the second side surface of the fourth lens is concave; a fifth lens with an optical power; a sixth lens with a positive optical power; a seventh lens with a positive optical power; wherein, the number of lenses with optical power in the optical lens is seven; the optical lens satisfies: -0.9 ≤ F1 / F3 ≤ -0.5 and -0.3 ≤ F3 / F4 ≤ -0.17; wherein, F1 is the focal length of the first lens; F3 is the focal length of the third lens; F4 is the focal length of the fourth lens.

[0035] With such a configuration, the optical lens of the present application uses seven lenses with optical power and satisfies the relationships -0.9 ≤ F1 / F3 ≤ -0.5 and -0.3 ≤ F3 / F4 ≤ -0.17; on the one hand, the first lens is a negative lens with a shape convex towards the object side and having a diverging effect on light rays, which is beneficial for collecting light rays in a large field of view, increasing the light flux, and diffusing the light rays collected by the first lens to the image side of the first lens to achieve imaging with a large field of view angle; the third lens is a positive lens with a double-convex shape and having an obvious converging effect on light rays, which can appropriately smooth the light rays from the second lens and reduce the degree of divergence, enabling the light rays to smoothly transition to the subsequent lenses; the fourth lens is a negative lens with a meniscus shape and convex towards the object side, which can play a good diffusing role on the light rays entering the fourth lens after exiting from the third lens, making the exiting light rays have a larger included angle with the principal optical axis, so as to achieve a smaller overall optical length at the same image height; in addition, the exiting light rays of the fourth lens have a larger included angle with the principal optical axis, which can also make the incident area of the subsequent lens larger, facilitating the subsequent lens to correct aberration; on the other hand, not only by limiting the relationship between the focal length of the first lens and the focal length of the third lens, the light rays exiting from the third lens to the aperture are in a certain diverging state, which can increase the entrance pupil diameter of the optical lens, so that the f-number can be reduced when the focal length is constant, and thus the light input of the optical lens can be increased; but also by limiting the relationship between the focal length of the third lens and the focal length of the fourth lens, the light rays can be smoothly transitioned, improving the resolution ability of the optical lens.

[0036] It should be noted that the focal length F1 of the first lens is negative and the focal length F3 of the third lens is positive: if F1 / F3 < -0.9, the divergence state of the light rays emerging from the third lens to the diaphragm is relatively weak, which is not conducive to increasing the entrance pupil diameter of the optical lens; while if F1 / F3 > -0.5, the divergence state of the light rays emerging from the third lens to the diaphragm is too strong, resulting in the light rays emerging from the third lens not being able to enter the fourth lens smoothly, leading to excessive aberration and affecting the imaging quality. In addition, the relationship F3 / F4 has a significant impact on the light ray deflection ability of the intermediate transition group of the optical lens: if F3 / F4 < -0.3, it will cause the converging ability of the third lens to weaken and the diverging ability of the fourth lens to strengthen, resulting in too strong a divergence ability of the light rays. Furthermore, when the total optical length is kept unchanged, the correction pressure on the subsequent lenses is too high, which is not conducive to improving the resolution; while if F3 / F4 > -0.17, it will cause the converging ability of the third lens to strengthen and the diverging ability of the fourth lens to weaken, resulting in a sharp drop in the slope of the marginal light rays after the third lens, and the fourth lens being unable to effectively control the light ray trend, leading to a relatively large incident angle of the rear-end light rays, thus introducing too much aberration and also being not conducive to improving the resolution.

[0037] The sixth aspect of the present application provides such an optical lens, which sequentially includes, along the optical axis from the first side to the second side: a first lens with a negative optical power; a second lens with a negative optical power; a third lens with a positive optical power; a fourth lens with a negative optical power; a fifth lens with an optical power; a sixth lens with a positive optical power; a seventh lens with a positive optical power; wherein, the number of lenses with optical power in the optical lens is seven; the optical lens satisfies: 2.3 ≤ F6 / F ≤ 12 and 2.7 ≤ F7 / F ≤ 15; wherein, F6 is the focal length of the sixth lens; F7 is the focal length of the seventh lens; F is the total effective focal length of the optical lens.

[0038] With such a setting, the optical lens of the present application uses seven lenses with optical power and satisfies the relationships 2.3 ≤ F6 / F ≤ 12 and 2.7 ≤ F7 / F ≤ 15; not only does it define the relationship between the focal length of the sixth lens and the total effective focal length of the optical lens, and converges the front-end light rays through the sixth lens with a positive optical power, making the light ray trend transition smoothly, which is conducive to improving the image quality; but also defines the relationship between the focal length of the seventh lens and the total effective focal length of the optical lens, and further converges the front-end light rays through the seventh lens with a positive optical power, making the light rays converge smoothly to the image plane, which is conducive to ensuring that the system obtains the best imaging effect.

[0039] It should be noted that the sixth lens, as the second last lens in the optical lens, is used to perform the final fine adjustment on the light rays, so that the light rays are accurately focused on the detector, ensuring that the optical system obtains the best imaging effect: if F6 / F < 2.3, it will cause the adjustment range of the sixth lens on the light rays to be too large, which is not conducive to the smooth transition of the light ray trend and is also not conducive to the improvement of the image quality; if F6 / F > 12, it will cause the adjustment range of the sixth lens on the light rays to be too weak to reflect the adjustment effect of the sixth lens. In addition, the seventh lens, as the last lens in the optical lens, is used to undertake the final correction of the aberration, ensuring that the optical system obtains the best imaging effect and also playing a fine adjustment role on the light rays: if F7 / F < 2.7, it will cause the adjustment range of the seventh lens on the light rays to be too large, which is not conducive to the smooth transition of the light ray trend and is also not conducive to the improvement of the image quality; if F7 / F > 15, it will cause the adjustment range of the seventh lens on the light rays to be too weak to reflect the adjustment effect of the seventh lens. BRIEF DESCRIPTION OF THE DRAWINGS

[0040] Other features, objects, and advantages of the present application will become more apparent by reading the detailed description of the non-limiting embodiments with reference to the following drawings. Among them:

[0041] Figure 1 shows a schematic structural diagram of an optical lens according to Embodiment 1 of the present application;

[0042] Figure 2 shows a spot diagram of an optical lens according to Embodiment 1 of the present application;

[0043] Figure 3 shows a schematic structural diagram of an optical lens according to Embodiment 2 of the present application;

[0044] Figure 4 shows a spot diagram of an optical lens according to Embodiment 2 of the present application;

[0045] Figure 5 shows a schematic structural diagram of an optical lens according to Embodiment 3 of the present application;

[0046] Figure 6 shows a spot diagram of an optical lens according to Embodiment 3 of the present application;

[0047] Figure 7 shows a schematic structural diagram of an optical lens according to Embodiment 4 of the present application;

[0048] Figure 8 shows a spot diagram of an optical lens according to Embodiment 4 of the present application;

[0049] Figure 9 shows a schematic structural diagram of an optical lens according to Embodiment 5 of the present application;

[0050] Figure 10 Shows the spot diagram of the optical lens according to Embodiment 5 of the present application;

[0051] Figure 11 Shows the structural schematic diagram of the optical lens according to Embodiment 6 of the present application;

[0052] Figure 12 Shows the spot diagram of the optical lens according to Embodiment 6 of the present application;

[0053] Figure 13 Shows the structural schematic diagram of the optical lens according to Embodiment 7 of the present application;

[0054] Figure 14 Shows the spot diagram of the optical lens according to Embodiment 7 of the present application;

[0055] Figure 15 Shows the structural schematic diagram of the optical lens according to Embodiment 8 of the present application;

[0056] Figure 16 Shows the spot diagram of the optical lens according to Embodiment 8 of the present application;

[0057] Figure 17 Shows the structural schematic diagram of the optical lens according to Embodiment 9 of the present application;

[0058] Figure 18 Shows the spot diagram of the optical lens according to Embodiment 9 of the present application;

[0059] Figure 19 Shows the structural schematic diagram of the optical lens according to Embodiment 10 of the present application;

[0060] Figure 20 Shows the spot diagram of the optical lens according to Embodiment 10 of the present application;

[0061] Figure 21 Shows the structural schematic diagram of the optical lens according to Embodiment 11 of the present application;

[0062] Figure 22 Shows the spot diagram of the optical lens according to Embodiment 11 of the present application;

[0063] Figure 23 Shows the structural schematic diagram of the optical lens according to Embodiment 12 of the present application;

[0064] Figure 24 Shows the spot diagram of the optical lens according to Embodiment 12 of the present application;

[0065] Figure 25 Shows the structural schematic diagram of the optical lens according to Embodiment 13 of the present application;

[0066] Figure 26 Shows the spot diagram of the optical lens according to Embodiment 13 of the present application;

[0067] Figure 27 Shows the structural schematic diagram of the optical lens according to Embodiment 14 of the present application;

[0068] Figure 28 Shows the spot diagram of the optical lens according to Embodiment 14 of the present application;

[0069] Figure 29 Shows the structural schematic diagram of the optical lens according to Embodiment 15 of the present application;

[0070] Figure 30 Shows the spot diagram of the optical lens according to Embodiment 15 of the present application;

[0071] Figure 31 Shows the structural schematic diagram of the optical lens according to Comparative Example 1 of the present application;

[0072] Figure 32 Shows the spot diagram of the optical lens according to Comparative Example 1 of the present application;

[0073] Figure 33 Shows the structural schematic diagram of the optical lens according to Comparative Example 2 of the present application;

[0074] Figure 34 Shows the spot diagram of the optical lens according to Comparative Example 2 of the present application;

[0075] Figure 35 Shows the structural schematic diagram of the optical lens according to Comparative Example 3 of the present application. Detailed implementation manners

[0076] To better understand the present application, more detailed descriptions of various aspects of the present application will be made with reference to the accompanying drawings. It should be understood that these detailed descriptions are only descriptions of the exemplary embodiments of the present application and do not limit the scope of the present application in any way. Throughout the specification, the same reference numerals refer to the same elements.

[0077] It should be noted that in this specification, the expressions such as first, second, and third are only used to distinguish one feature from another feature and do not represent any limitation on the feature. Therefore, without departing from the teachings of the present application, the first lens discussed below may also be referred to as the second lens or the third lens.

[0078] In the drawings, for the sake of illustration, the thickness, size, and shape of the lens are slightly exaggerated. Specifically, the spherical or aspherical shapes shown in the drawings are shown by way of example. That is, the spherical or aspherical shapes are not limited to the spherical or aspherical shapes shown in the drawings. The drawings are for illustrative purposes only and are not drawn to an exact scale.

[0079] In this document, the paraxial region refers to the region near the optical axis. If the lens surface is convex and the position of the convex surface is not defined, it means that the lens surface is convex at least in the paraxial region; if the lens surface is concave and the position of the concave surface is not defined, it means that the lens surface is concave at least in the paraxial region. The surface of each lens closest to the first side is called the first side surface of the lens, and the surface of each lens closest to the second side is called the second side surface of the lens.

[0080] It should also be understood that the terms "comprising", "including", and / or "having", when used in this specification, mean the presence of the stated features, elements, and / or components, but do not exclude the presence or addition of one or more other features, elements, components, and / or combinations thereof. In addition, when describing the embodiments of the present application, the use of "may" means "one or more embodiments of the present application". And the term "exemplary" is intended to refer to an example or illustration.

[0081] Unless otherwise defined, all terms used herein (including technical and scientific terms) have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. It should also be understood that terms (such as those defined in a common dictionary) should be interpreted as having a meaning consistent with their meaning in the context of the relevant art, and will not be interpreted in an idealized or overly formal sense unless expressly so defined herein.

[0082] It should be noted that, without conflict, the embodiments and features in the embodiments of this application may be combined with each other. The following will refer to the drawings and combine with embodiments to detail this application. The features, principles, and other aspects of this application are described in detail below.

[0083] The optical lens according to an exemplary embodiment of the present application may include, for example, seven lenses having optical power, namely, a first lens, a second lens, a third lens, a fourth lens, a fifth lens, a sixth lens, and a seventh lens. These seven lenses are arranged in sequence along the optical axis from the first side to the second side.

[0084] In an exemplary embodiment, the optical lens provided by the present application can be used as a light-receiving lens or a light-emitting lens, where: A light-receiving lens is generally used to collect light rays from the object space, and the collected light rays are used to form detection information, including but not limited to imaging, laser point cloud, etc.; A light-emitting lens is generally used to transmit the light rays from the light-emitting unit to the object space. According to the function of the light rays, the light rays transmitted to the object space can be divided into projection light rays for forming a projection image or detection light rays for detecting target object information, etc.

[0085] It should be noted that when the optical lens provided by the present application is used as a light-receiving lens such as a camera lens, a lidar receiving-end lens, a microscope lens, or a telescope lens, the "first side" mentioned in this article can refer to the object side, and the "second side" can refer to the image side (such as the side where the photoelectric sensor or the retina is located), that is, the light rays from the object side can be imaged on the image side through the optical lens. Among them, the camera lens can be, for example, a vehicle-mounted camera, an infrared camera, a drone camera, a night vision camera, a security monitoring camera, etc. When the optical lens provided by the present application is used as a light-emitting lens such as a projection lens or a lidar transmitting-end lens, the "first side" mentioned in this article can refer to the object side, and the "second side" can refer to the light source side, that is, the light rays from the light source side can be projected on the object side through the optical lens.

[0086] In some possible embodiments, the optical lens provided by the present application can also undertake both the light-receiving function and the light-emitting function at the same time. For example, the optical lens provided by the present application is used in a lidar system with a shared light-transmitting and light-receiving optical path, and the optical lens undertakes the functions of emitting laser and receiving radar echo beams at the same time. Another example is that the optical lens provided by the present application is used in a system integrating optical communication and radar, and the optical lens undertakes the functions of emitting modulated optical signals and receiving radar echo beams at the same time.

[0087] In addition, the lidar mentioned in the present application can be implemented as a mechanical lidar, a semi-solid-state lidar, or a pure solid-state lidar.

[0088] In an exemplary embodiment, the first lens may have a negative optical power, its first side can be implemented as a convex surface, and its second side can be implemented as a concave surface. In the above embodiment, the first lens is a negative lens, which has a diverging effect on light rays, and the shape of the first lens bulges towards the object side, which is beneficial to collecting light rays with a large field of view, increasing the light flux, and diffusing the light rays collected by the first lens to the rear (image side) of the first lens, so as to achieve imaging with a large field of view angle; at the same time, the first side of the first lens is set as a convex surface, which is beneficial to the sliding of water droplets in practical applications, and reduces the influence of external environments such as water droplets on the imaging quality. The present application does not limit the material of the first lens. For example, the first lens can be made of materials such as glass and plastic.

[0089] In an exemplary embodiment, the second lens may have a negative optical power. Its first side may be implemented as a convex surface, and its second side may be implemented as a concave surface. In the above embodiment, the second lens is a negative lens with a meniscus shape and concave towards the image side, which is beneficial for further diffusing the light ahead, reducing the light angle, and enabling the light to transition smoothly.

[0090] In an exemplary embodiment, the third lens may have a positive optical power. Its first side may be implemented as a convex surface, and its second side may be implemented as a convex surface. In the above embodiment, the third lens is a positive lens with a biconvex shape, which has an obvious converging effect on light, can appropriately smooth the light from the second lens, reduce the divergence degree, and enable the light to transition smoothly to the rear lens.

[0091] In an exemplary embodiment, the fourth lens may have a negative optical power. Its first side may be implemented as a convex surface, and its second side may be implemented as a concave surface. In the above embodiment, the fourth lens is a negative lens with a meniscus shape and convex towards the object side, which can play a better role in diffusing the light that enters the fourth lens after exiting the third lens, making the outgoing light have a larger angle with the principal optical axis, so as to achieve a smaller overall optical length under the same image height. In addition, the outgoing light of the fourth lens has a larger angle with the principal optical axis, which can also make the incident area of the rear lens larger, facilitating the rear lens to correct aberration.

[0092] It should be noted that if the first side of the fourth lens is set as a concave surface and the second side is set as a convex surface, that is, with a meniscus shape and convex towards the image side, a larger overall optical length will be achieved under the same image height, resulting in a larger volume of the optical lens, which is not conducive to the miniaturization design of the terminal device, such as being unable to adapt to the miniaturization requirements of various in-vehicle terminals. For example, in Examples 1 to 15, the fourth lens is a convex-concave lens, and correspondingly, the maximum overall optical length of the optical lens is only 22.4 mm; while in Comparative Example 1, the fourth lens is a concave-convex lens, and correspondingly, the overall optical length of the optical lens reaches 30.7964 mm.

[0093] In a possible implementation, the fifth lens has an optical power. For example, the fifth lens has a positive optical power, or the fifth lens has a negative optical power.

[0094] When the fifth lens has a positive optical power, its first side may be implemented as a concave surface, and its second side may be implemented as a convex surface. In the above embodiment, the fifth lens is a positive lens with a meniscus shape and concave towards the object side, which can reduce the incident angle of the light entering the fifth lens, is beneficial for balancing the convergence difference between the marginal light and the paraxial light, and reducing the coma aberration at a large field angle. It should be noted that the asymmetric folding of the off-axis light will cause a comet-shaped spot; while a smooth path design can ensure the symmetric convergence of the light and reduce this asymmetry.

[0095] When the fifth lens has a negative focal power, the first side of the fifth lens can be implemented as a convex surface, and the second side can be implemented as a concave surface. In the above implementation, the fifth lens is a negative lens, its shape is meniscus and convex towards the object side, and a relatively large focal length can also reduce the incident angle of light entering the fifth lens, which is beneficial to balancing the convergence difference between marginal rays and paraxial rays and reducing the coma of a large field of view angle.

[0096] In an exemplary implementation, the sixth lens may have a positive focal power, and the surface type of the sixth lens can be implemented as convex-concave type, concave-convex type or convex-convex type.

[0097] When the sixth lens has a positive focal power, its first side is implemented as a convex surface and the second side is implemented as a convex surface, the sixth lens is a positive lens, and its shape is double convex, which is beneficial to converging light and making the light trend transition smoothly; at the same time, it can make the light reach the image plane faster and reduce the total length of the lens. In addition, the marginal field light will deflect towards the optical axis direction after passing through the sixth lens, which is beneficial to reducing the aperture of the rear port of the lens and performing preliminary aberration correction on the incident light.

[0098] When the sixth lens has a positive focal power, its first side is implemented as a convex surface and the second side is implemented as a concave surface, the sixth lens is a positive lens, its first side is set as a convex surface, so that the light can be appropriately converged, which is beneficial to receiving the light emerging from the fifth lens, further depressing the height of the light in the lens, and facilitating the reduction of the aperture of the rear lens; at the same time, the second side of the sixth lens is set as a concave surface, and the surface type is relatively gentle, which is beneficial to the smooth transition of light, so as to preliminarily correct the aberration of the light incident on the sixth lens.

[0099] When the sixth lens has a positive focal power, its first side is implemented as a concave surface and the second side is implemented as a convex surface, the sixth lens is a positive lens, its first side is set as a concave surface, and the surface type is relatively gentle, which is beneficial to the smooth transition of the optical fiber and reduces the aberration of the emerging light; at the same time, the second side of the sixth lens is set as a convex surface, so that the light can be appropriately converged, which is beneficial to reducing the height of the emerging light and facilitating the reduction of the aperture of the rear lens.

[0100] In an exemplary implementation, the seventh lens may have a positive focal power, and the surface type of the sixth lens can be implemented as convex-concave type, concave-convex type or convex-convex type.

[0101] When the seventh lens has a positive focal power, its first side is implemented as a convex surface and the second side is implemented as a convex surface, the seventh lens is a positive lens, and its shape is double convex, which is beneficial to converging light and making the light trend converge to the image plane smoothly; at the same time, the seventh lens can cooperate with the sixth lens to jointly correct aberrations and improve image quality.

[0102] When the seventh lens has a positive optical power, with its first side implemented as a convex surface and its second side implemented as a concave surface, the seventh lens is a positive lens. Its first side is set as a convex surface so that light can be properly converged, which is beneficial for receiving the light emerging from the sixth lens, further reducing the height of the light in the lens and facilitating the reduction of the aperture. At the same time, the second side of the seventh lens is set as a concave surface with a relatively gentle surface shape, which is beneficial for the light to emerge smoothly and helps to improve the image quality.

[0103] When the seventh lens has a positive optical power, with its first side implemented as a concave surface and its second side implemented as a convex surface, the seventh lens is a positive lens. Its first side is set as a concave surface with a relatively gentle surface shape, which is beneficial for the smooth transition of light. At the same time, the second side of the seventh lens is set as a convex surface, which can converge the front-end light and make the light converge smoothly to the image plane.

[0104] In an exemplary embodiment, the optical lens may further include a diaphragm, and the diaphragm can be disposed between the third lens and the fourth lens. By disposing the diaphragm between the third lens and the fourth lens, it is beneficial for the effective convergence of the light entering the optical system, reducing the aperture of the front-end lens of the optical system and lowering the assembly sensitivity of the system.

[0105] In an exemplary embodiment, one or more spherical surfaces may be provided on the surfaces of the first lens, the second lens, the third lens, the fourth lens, the fifth lens, the sixth lens, and the seventh lens. In addition, in other embodiments of the present application, one or more aspherical surfaces may be provided on the surfaces of the first lens, the second lens, the third lens, the fourth lens, the fifth lens, the sixth lens, and the seventh lens, which can reasonably control the light deflection in each field of view, effectively reduce various aberrations such as spherical aberration, coma, and distortion, and improve the performance of the optical lens.

[0106] In an exemplary embodiment, the optical lens may further include a filter located between the seventh lens and the image plane to filter light with different wavelengths. The optical lens may also be provided with a protective glass between the filter and the image plane according to actual needs to prevent the internal components (such as chips) of the optical lens from being damaged.

[0107] In an exemplary embodiment, the optical lens may further include a photoelectric sensor disposed on the second side. Optionally, the photoelectric sensor disposed on the second side may be a charge-coupled device (CCD) or a complementary metal-oxide-semiconductor device (CMOS).

[0108] In an exemplary embodiment, the focal length F1 of the first lens and the focal length F3 of the third lens may satisfy: -0.9 ≤ F1 / F3 ≤ -0.5. Preferably, -0.81 ≤ F1 / F3 ≤ -0.58. By controlling this relationship, the light rays exiting from the third lens to the aperture are in a certain divergent state, which can increase the entrance pupil diameter of the optical lens. Thus, the f-number can be reduced when the focal length is fixed, and further, the light input amount of the optical lens can be increased.

[0109] It should be noted that the focal length F1 of the first lens is negative and the focal length F3 of the third lens is positive: If F1 / F3 < -0.9, the divergent state of the light rays exiting from the third lens to the aperture is relatively weak, which is not conducive to increasing the entrance pupil diameter of the optical lens; while if F1 / F3 > -0.5, the divergent state of the light rays exiting from the third lens to the aperture is too strong, resulting in the light rays exiting from the third lens not being able to enter the fourth lens smoothly, leading to excessive aberration and affecting the imaging quality. For example, in Comparative Example 2, F1 / F3 of the optical lens is equal to -0.417, that is, greater than -0.5. Through simulation, it is found that its RMS (Root Mean Square) radius is relatively large, the aberration is large, and the imaging quality is poor; in Comparative Example 3, F1 / F3 of the optical lens is equal to -1.097, that is, less than -0.9. Through simulation, it is found that its entrance pupil diameter is relatively small and the light input amount of the optical lens is poor.

[0110] In an exemplary embodiment, the focal length F3 of the third lens and the total effective focal length F of the optical lens may satisfy: 1.7 ≤ F3 / F ≤ 2.8. Preferably, 1.9 ≤ F3 / F ≤ 2.5. By controlling this relationship, the optical path required for the light rays exiting from the third lens to converge to the aperture is shorter, thereby reducing the overall optical length of the optical lens, which is beneficial to meeting the requirements of various terminal devices, such as cameras, projection lamps, or lidar, etc.

[0111] It should be noted that both the focal length F3 of the third lens and the total effective focal length F of the optical lens are positive: If F3 / F < 1.7, the focal length F3 of the third lens is too small, and the converging effect on the light rays is too strong, which will reduce the entrance pupil diameter of the optical lens, thereby reducing the light flux of the optical lens; while if F3 / F > 2.8, although the light rays can be quickly converged to the aperture, the light rays exiting from the third lens are relatively divergent, which is likely to cause a large amount of aberration and increase the difficulty of subsequent aberration correction.

[0112] In addition, the combination of the relational expression 1.7 ≤ F3 / F ≤ 2.8 and the above-mentioned relational expression -0.9 ≤ F1 / F3 ≤ -0.5 not only limits the relationship between the focal length of the first lens and the focal length of the third lens, making the light rays exiting from the third lens to the aperture in a certain divergent state, which can increase the entrance pupil diameter of the optical lens, thereby reducing the f-number under a certain focal length, and further increasing the light input of the optical lens; but also limits the relationship between the focal length of the third lens and the total effective focal length of the optical lens, making the optical path required for the light rays exiting from the third lens to converge to the aperture shorter, thereby reducing the overall optical length of the optical lens; in other words, through the combination of the relational expression F3 / F and the above-mentioned relational expression F1 / F3 in this application, it is possible to achieve large light throughput, high resolution, and miniaturization of the optical lens.

[0113] In an exemplary embodiment, the radius of curvature R9 of the first side surface of the fifth lens and the radius of curvature R10 of the second side surface of the fifth lens satisfy: 1 ≤ R9 / R10 ≤ 4.2. Preferably, 1 ≤ R9 / R10 ≤ 3.7. By controlling this relational expression, the convergence difference between marginal rays and paraxial rays can be balanced, and the coma of a large field of view can be reduced. It can be understood that the radii of curvature of the first side surface and the second side surface of the fifth lens are both greater than 0: if R9 / R10 < 1, it will cause R9 and R10 to be too close. Combining with the fact that the light rays exiting from the fourth lens have a large divergence angle, the marginal rays diffused by the fourth lens are prone to strong refraction at the fifth lens, which is not conducive to balancing the convergence difference between marginal rays and paraxial rays, and large field of view coma is likely to occur; if R9 / R10 > 4.2, on the premise of ensuring that the light rays exiting from the fourth lens enter the fifth lens at a small angle, the marginal rays are also prone to large-angle refraction at the exit surface of the fifth lens, which is not conducive to balancing the convergence difference between marginal rays and paraxial rays, and large field of view coma is likely to occur.

[0114] In an exemplary embodiment, the radius of curvature R1 of the first side surface of the first lens and the radius of curvature R3 of the first side surface of the second lens satisfy: 0.5 ≤ R1 / R3 ≤ 3. Preferably, 0.55 ≤ R1 / R3 ≤ 2.7. It can be understood that although the first side surface with a positive radius of curvature in the first lens is beneficial for collecting large-angle incident light rays and facilitating the improvement of the light flux; however, if the incident angle of the light entering the lens is large, there will be a large spherical aberration in the focusing positions of the marginal rays and the paraxial rays. However, through the above-mentioned relational expression R1 / R3 in this application, the radius of curvature R3 of the first side surface of the second lens is less than twice the radius of curvature R1 of the first side surface of the first lens, so that the incident angle of the light rays from the first lens when entering the second lens is smaller, thereby avoiding the generation of large aberrations, such as spherical aberration and coma, which is beneficial for further improving the light flux and resolution performance of the optical lens.

[0115] In an exemplary embodiment, the distance L_stop between the aperture and the first side surface of the first lens on the optical axis and the total optical length TTL of the optical lens may satisfy: 0.24 ≤ L_stop / TTL ≤ 0.41. Preferably, 0.29 ≤ L_stop / TTL ≤ 0.36. It can be understood that if L_stop / TTL is too large, the aperture of the first lens will be too large, which is not conducive to the miniaturization of the optical lens.

[0116] It should be noted that by combining the relation 0.24 ≤ L_stop / TTL ≤ 0.41 with the above relation -0.9 ≤ F1 / F3 ≤ -0.5, the present application not only limits the relationship between the focal length of the first lens and the focal length of the third lens, so that the light rays emerging from the third lens to the aperture are in a certain divergent state, which can increase the entrance pupil diameter of the optical lens, thereby reducing the f-number at a certain focal length, and further increasing the light input of the optical lens; but also limits the relationship between the distance between the aperture and the first side surface of the first lens on the optical axis and the total optical length, avoiding the aperture of the first lens from being too large, which is conducive to the miniaturization of the optical lens, and thus can achieve a large light throughput, high resolution and miniaturization of the optical lens.

[0117] In an exemplary embodiment, the focal length F3 of the third lens and the focal length F4 of the fourth lens may satisfy: -0.3 ≤ F3 / F4 ≤ -0.17. Preferably, -0.27 ≤ F3 / F4 ≤ -0.17. By controlling this relation, the light rays can transition smoothly, improving the resolution ability of the optical lens. It can be understood that the relation F3 / F4 has a significant impact on the light ray deflection ability of the intermediate transition group of the optical lens: if F3 / F4 < -0.3, the converging ability of the third lens becomes weak, and the diverging ability of the fourth lens becomes strong, resulting in too strong a diverging ability of the light rays, and further, when the total optical length remains unchanged, the correction pressure on the subsequent lenses is too large, which is not conducive to improving the resolution; while if F3 / F4 > -0.17, the converging ability of the third lens becomes strong, and the diverging ability of the fourth lens becomes weak, resulting in a sudden drop in the slope of the marginal light rays after the third lens, and the fourth lens cannot effectively control the light ray trend, resulting in a too large incident angle of the rear-end light rays, thereby introducing too many aberrations, which is also not conducive to improving the resolution.

[0118] It should be noted that by combining the relation -0.3 ≤ F3 / F4 ≤ -0.17 with the above relation 1.7 ≤ F3 / F ≤ 2.8, the present application not only limits the relationship between the focal length of the third lens and the focal length of the fourth lens, so that the light rays can transition smoothly, improving the resolution ability of the optical lens; but also limits the relationship between the focal length of the third lens and the total effective focal length of the optical lens, so that the optical path required for the light rays emerging from the third lens to converge to the aperture is shorter, thereby reducing the total optical length of the optical lens, and further achieving the miniaturization and high resolution of the optical lens.

[0119] In addition, the present application can also combine the relationship of -0.3≤F3 / F4≤-0.17 with the above-mentioned relationship of -0.9≤F1 / F3≤-0.5, not only by limiting the relationship between the focal length of the third lens and the focal length of the fourth lens, so that the light transitions smoothly and the resolving power of the optical lens is improved; but also by limiting the relationship between the focal length of the first lens and the focal length of the third lens, the light emitted from the third lens to the aperture is in a certain divergent state, which can increase the entrance pupil diameter of the optical lens, thereby reducing the aperture number when the focal length is constant, and then increasing the amount of light entering the optical lens, thereby ensuring that the overall trend of the light is smooth, facilitating the improvement of resolving power and increasing the amount of light passing through.

[0120] In an exemplary embodiment, the focal length F1 of the first lens and the total effective focal length F of the optical lens satisfy: -1.9≤F1 / F≤-1.2. Preferably, -1.7≤F1 / F≤-1.4. By controlling the relationship F1 / F, it is possible to achieve a smooth transition of the light beam while achieving a large field of view, which is beneficial to reducing aberrations and improving image quality. It can be understood that the focal length F1 of the first lens is negative, and the relationship F1 / F plays a key role in the incident angle and initial convergence or divergence of the light of the lens: if F1 / F<-1.9, it will lead to insufficient light divergence ability, thereby affecting the light transmittance and imaging quality of the lens; if F1 / F>-1.2, it will cause the divergence effect of the light from the object side space to be too strong, which is easy to introduce a large amount of aberrations.

[0121] In an exemplary embodiment, the focal length F2 of the second lens and the total effective focal length F of the optical lens satisfy: -9≤F2 / F≤-5. Preferably, -7.5≤F2 / F≤-6. By controlling the relationship F2 / F, it is helpful to smoothly transition the light received by the first lens, facilitate the correction of the aberration introduced by the first lens, and improve the image quality. It can be understood that the focal length F2 of the second lens is negative: if F2 / F<-9, the second lens will have a weaker divergence effect on the light from the first lens, which is not conducive to aberration correction; if F2 / F>-5, it is not conducive to the smooth transition of the light received by the first lens, and it is easy to introduce more aberrations.

[0122] It should be noted that, in the present application, by combining the relational expression -9 ≤ F2 / F ≤ -5 with the above-mentioned relational expression -1.9 ≤ F1 / F ≤ -1.2, not only can the focal length of the first lens and the total effective focal length of the optical lens be controlled within a reasonable range, but also while achieving light collection for a large field of view through the first lens with a negative optical power, a smooth transition of the light beam can be realized, which is convenient for reducing aberration and improving image quality; moreover, the focal length of the second lens and the total effective focal length of the optical lens can be controlled within a reasonable range, and the second lens with a negative optical power helps to achieve a smooth transition of the light received from the first lens, correct the aberration introduced by the first lens, and is convenient for improving image quality, thereby realizing a large field of view and high resolution of the optical lens.

[0123] In addition, in the present application, by combining the relational expression -9 ≤ F2 / F ≤ -5 with other relational expressions -1.9 ≤ F1 / F ≤ -1.2 and 1.7 ≤ F3 / F ≤ 2.8, on one hand, the focal length of the first lens and the total effective focal length of the optical lens can be controlled within a reasonable range, and while achieving light collection for a large field of view through the first lens with a negative optical power, a smooth transition of the light beam can be realized, which is convenient for reducing aberration and improving image quality; on the other hand, the focal length of the second lens and the total effective focal length of the optical lens can be controlled within a reasonable range, and the second lens with a negative optical power helps to achieve a smooth transition of the light received from the first lens, correct the aberration introduced by the first lens, and is convenient for improving image quality; furthermore, by defining the relationship between the focal length of the third lens and the total effective focal length of the optical lens, the optical path required for the light emerging from the third lens to converge to the diaphragm is shorter, thereby reducing the overall optical length of the optical lens, and further realizing a large field of view, miniaturization and high resolution of the optical lens.

[0124] In an exemplary embodiment, the focal length F6 of the sixth lens and the total effective focal length F of the optical lens satisfy: 2.3 ≤ F6 / F ≤ 12. Preferably, 2.5 ≤ F6 / F ≤ 11. By controlling this relational expression, the sixth lens with a positive focal length can converge the front-end light, enabling a smooth transition of the light trend, which is beneficial to improving image quality. It can be understood that the sixth lens, as the second-to-last lens in the optical lens, is used to perform a final fine adjustment on the light, so that the light is accurately focused on the detector, ensuring that the optical system obtains the best imaging effect: if F6 / F < 2.3, it will cause the adjustment range of the sixth lens on the light to be too large, which is not conducive to the smooth transition of the light trend and the improvement of image quality; if F6 / F > 12, it will cause the adjustment range of the sixth lens on the light to be too weak to reflect the adjustment effect of the sixth lens.

[0125] In an exemplary embodiment, the focal length F7 of the seventh lens and the total effective focal length F of the optical lens satisfy: 2.7 ≤ F7 / F ≤ 15. Preferably, 3 ≤ F7 / F ≤ 13. By controlling this relationship, the front-end light can be further converged by the seventh lens with a positive focal length, enabling the light to converge smoothly onto the image plane, which is beneficial to improving the image quality. It can be understood that the seventh lens, as the last lens in this optical lens, is used to undertake the final correction of aberrations, ensuring that the optical system obtains the best imaging effect, and also plays a fine-tuning role on the light: if F7 / F < 2.7, it will lead to too large an adjustment amplitude of the seventh lens on the light, which is not conducive to the smooth transition of the light trend and the improvement of image quality; if F7 / F > 15, it will lead to too weak an adjustment amplitude of the seventh lens on the light, and the adjustment effect of the seventh lens cannot be reflected.

[0126] It should be noted that in this application, by combining the relationship 2.7 ≤ F7 / F ≤ 15 with the above relationship 2.3 ≤ F6 / F ≤ 12, not only the relationship between the focal length of the sixth lens and the total effective focal length of the optical lens is defined, and the front-end light is converged by the sixth lens with a positive refractive power, enabling the light trend to transition smoothly, which is beneficial to improving the image quality; but also the relationship between the focal length of the seventh lens and the total effective focal length of the optical lens is defined, and the front-end light is further converged by the seventh lens with a positive refractive power, enabling the light to converge smoothly onto the image plane, which is beneficial to ensuring that the system obtains the best imaging effect, thereby achieving high resolution of the optical lens.

[0127] According to the exemplary embodiment of this application, the optical lens can satisfy at least one of the following relationships: 0.7 ≤ (F × θ) / D ≤ 1.1, 0.1 ≤ BFL / TTL ≤ 0.3, and 0.14 ≤ T_DIR / TTL ≤ 0.3; to achieve miniaturization of the optical lens; where F is the total effective focal length of the optical lens; θ is the radian value of the maximum field of view angle of the optical lens; D is the maximum clear aperture of the first side of the first lens corresponding to the maximum field of view angle of the optical lens; BFL is the back focal length of the optical lens; TTL is the total optical length of the optical lens; and T_DIR is the sum of the air gaps of all adjacent lenses on the optical axis in the optical lens.

[0128] In an exemplary embodiment, the total effective focal length F of the optical lens, the radian value θ of the maximum field of view angle of the optical lens, and the maximum clear aperture D on the first side of the first lens corresponding to the maximum field of view angle of the optical lens can satisfy: 0.7 ≤ (F × θ) / D ≤ 1.1. Preferably, 0.8 ≤ (F × θ) / D ≤ 0.95. By controlling this relationship, the aperture at the front end of the lens can be made smaller, facilitating the reduction of the volume of the imaging system of the lens and achieving a small aperture of the optical lens.

[0129] In an exemplary embodiment, the back focal length (BFL) of the optical lens and the total optical length (TTL) of the optical lens may satisfy: 0.1 ≤ BFL / TTL ≤ 0.3. Preferably, 0.11 ≤ BFL / TTL ≤ 0.28. By controlling this relationship, the back focal length of the optical lens can be reasonably controlled, which is beneficial to reserving space for the installation and focusing of optical elements while ensuring miniaturization, and avoiding interference between structural components. It can be understood that if BFL / TTL < 0.1, it is not conducive to the assembly and adjustment of the device, reduces the assembly efficiency, and increases the installation cost; if BFL / TTL > 0.3, it is easy to make the volume of the optical system too large, which is not conducive to realizing the miniaturization of the optical lens.

[0130] In an exemplary embodiment, the sum of the air gaps T_DIR on the optical axis between all adjacent lenses in the optical lens and the total optical length TTL of the optical lens may satisfy: 0.14 ≤ T_DIR / TTL ≤ 0.3. Preferably, 0.16 ≤ T_DIR / TTL ≤ 0.27. By controlling this relationship, the proportion of the invalid space can be compressed, and the structural compactness of the optical system can be achieved; at the same time, the reduction of the air gap means the improvement of the coupling degree between the lenses, which is also helpful for reducing the assembly sensitivity of the lenses.

[0131] In an exemplary embodiment, the focal length F1 of the first lens and the focal length F2 of the second lens satisfy: -0.26 / mm ≤ 1 / F1 + 1 / F2 ≤ -0.17 / mm. Preferably, -0.23 / mm ≤ 1 / F1 + 1 / F2 ≤ -0.2 / mm. By controlling this relationship, the optical lens has a large field of view angle, and at the same time, it is beneficial to the miniaturization and high resolution of the optical lens. It can be understood that the focal lengths of both the first lens and the second lens are negative, and the relationship 1 / F1 + 1 / F2 plays a decisive role in the initial divergence degree of the incident light, thereby affecting the field of view angle, volume, aberration, etc. of the optical lens: if 1 / F1 + 1 / F2 < -0.26 / mm, the divergence ability of the first lens and the second lens to the light is too strong, resulting in excessive divergence of the light before entering the third lens, which will significantly increase the incident height of the light on the third lens and the fourth lens, thereby introducing a large amount of coma and higher-order aberrations; at the same time, the excessive divergence of the first lens and the second lens to the light will also increase the subsequent lens interval to extend the convergence path, and force the maximum aperture of the lens to increase, thereby making the overall volume of the optical lens larger; if 1 / F1 + 1 / F2 > -0.17 / mm, it will cause the divergence degree of the first lens and the second lens to the light to be weak, making the light collection ability of the optical lens weak, thereby reducing the light flux of the lens, and thus resulting in a poor imaging effect in a darker environment.

[0132] According to an exemplary embodiment of the present application, the optical lens satisfies at least one of the following relationships: 2.5 ≤ F5 / F ≤ 6, 0.09 / mm ≤ 1 / F6 + 1 / F7 ≤ 0.2 / mm, and -2.1 ≤ F4 / TTL ≤ -1.2; or, the optical lens satisfies at least one of the following relationships: F5 / F ≤ -25, 0.09 / mm ≤ 1 / F6 + 1 / F7 ≤ 0.2 / mm, and -2.1 ≤ F4 / TTL ≤ -1.2; to achieve high resolution of the optical lens; where F5 is the focal length of the fifth lens; F is the total effective focal length of the optical lens; F6 is the focal length of the sixth lens; F7 is the focal length of the seventh lens; F4 is the focal length of the fourth lens; and TTL is the total optical length of the optical lens.

[0133] In an exemplary embodiment, the focal length F5 of the fifth lens and the total effective focal length F of the optical lens may satisfy: 2.5 ≤ F5 / F ≤ 6 or F5 / F ≤ -25. Preferably, 3.0 ≤ F5 / F ≤ 5 or -100 ≤ F5 / F ≤ -25. By controlling this relationship and reasonably distributing the focal length of the fifth lens, the incident angle of light entering the fifth lens can be reduced, which is beneficial to balancing the convergence difference between marginal rays and paraxial rays and reducing coma at a large field angle.

[0134] In an exemplary embodiment, the focal length F6 of the sixth lens and the focal length F7 of the seventh lens may satisfy: 0.09 / mm ≤ 1 / F6 + 1 / F7 ≤ 0.2 / mm. Preferably, 0.1 / mm ≤ 1 / F6 + 1 / F7 ≤ 0.19 / mm. By controlling this relationship, it helps to improve the imaging quality and structural compactness of the optical lens, etc.

[0135] It should be noted that if 1 / F6 + 1 / F7 < 0.09 / mm, it will result in insufficient light converging ability of the sixth lens and the seventh lens, unable to effectively compensate for the field curvature of the first five lenses, making the spot diameter larger and significantly affecting the detection ability; while if 1 / F6 + 1 / F7 > 0.2 / mm, it will cause the curvature radii of the sixth lens and the seventh lens to be too small, resulting in a significant increase in spherical aberration. It can be understood that when light passes through a lens, if the refraction angle of marginal rays is too large, it will cause marginal rays and paraxial rays to focus at different positions, forming spherical aberration; and a smooth light path can make light rays at different heights converge at the same focus by optimizing the lens curvature; in addition, by balancing the paths of marginal rays and paraxial rays, the entire image plane can tend to be flat and avoid edge blurring.

[0136] In an exemplary embodiment, the focal length F4 of the fourth lens and the overall optical length TTL of the optical lens may satisfy: -2.1 ≤ F4 / TTL ≤ -1.2. Preferably, -1.9 ≤ F4 / TTL ≤ -1.4. By controlling this relationship, the slope of the light beam in the middle region can be effectively adjusted to achieve high resolution of the optical lens. It can be understood that if F4 / TTL < -2.1, that is, the focal length of the fourth lens is too long and the optical power is weak, the divergence ability of the fourth lens is insufficient, and the spherical aberration and coma of the first three lenses cannot be effectively compensated, resulting in more correction pressure on the last three lenses and easily introducing field area and distortion; if F4 / TTL > -1.1, that is, the focal length of the fourth lens is too short and the optical power is strong, the divergence ability of the fourth lens is too strong, causing the light beam emitted by the fourth lens to diverge excessively, resulting in the last three lenses needing to converge with a greater curvature, leading to the aggravation of aberrations (such as astigmatism, chromatic aberration, etc.) in the edge field of view, and increasing the processing difficulty of the lens.

[0137] In an exemplary embodiment, the central thickness CT6 of the sixth lens on the optical axis and the central thickness CT7 of the seventh lens on the optical axis satisfy: 0.47 ≤ CT6 / CT7 ≤ 1.85. Preferably, 0.5 ≤ CT6 / CT7 ≤ 1.7. By controlling this relationship, the thicknesses of the sixth lens and the seventh lens are close, which is convenient for the light to converge smoothly to the image plane, helps the optical lens to have a small change in light deflection under high and low temperatures, and ensures better temperature performance of the optical lens.

[0138] In an exemplary embodiment, the overall optical length TTL of the optical lens and the maximum clear aperture D corresponding to the maximum field of view angle on the first side of the first lens satisfy: 1.4 ≤ TTL / D ≤ 2.2. Preferably, 1.6 ≤ TTL / D ≤ 1.9. By controlling this relationship, it can be ensured that the length of the optical lens is sufficient to support the effective interval between the lenses, avoiding the out-of-control superposition of optical power due to overly dense lenses (such as insufficient distance between positive and negative lenses and inability to fully compensate for aberrations, etc.), and can also ensure that the lens aperture is not too small relative to the lens length, ensuring the matching of the clear aperture and the focal length, avoiding the vignetting effect due to insufficient aperture (such as the occlusion of light rays in the edge field of view), and improving the energy utilization rate and signal-to-noise ratio of the receiving system. It can be understood that if TTL / D < 1.4, it will lead to too short lens spacing, resulting in ineffective superposition of the optical power of positive and negative lenses, thus introducing more aberrations; if TTL / D > 2.2, it will lead to too small lens aperture relative to the lens length, resulting in the occlusion of light rays in the edge field of view, thus affecting the field of view angle of the optical lens.

[0139] In an exemplary embodiment, the total effective focal length F of the optical lens and the entrance pupil diameter ENPD of the optical lens may satisfy: 1 ≤ F / ENPD ≤ 1.5. Preferably, 1.2 ≤ F / ENPD ≤ 1.3. It can be understood that the aperture value of the lidar receiver lens is usually between 0.8 and 2.8. By controlling this relationship, the optical lens has a smaller aperture value, which is beneficial to collecting more light, thereby achieving clear imaging in low-light environments. Therefore, using this optical lens as the lidar receiver lens can effectively improve the detection distance and detection accuracy of the lidar.

[0140] In an exemplary embodiment, the total optical length TTL of the optical lens and the total effective focal length F of the optical lens may satisfy: 5.1 ≤ TTL / F ≤ 7. Preferably, 6 ≤ TTL / F ≤ 6.1. By controlling this relationship, the length of the optical lens can be effectively limited, and miniaturization of the optical lens can be achieved.

[0141] In an exemplary embodiment, the total optical length TTL of the optical lens, the image height H corresponding to the maximum field of view angle of the optical lens, and the maximum field of view angle FOV of the optical lens may satisfy: 0.011 / ° ≤ TTL / H / FOV ≤ 0.016 / °. Preferably, TTL / H / FOV = 0.014 / °. By controlling this relationship, under the same ratio of image height to field of view, the length of the lens can be effectively limited, which is convenient for realizing miniaturization of the lens.

[0142] In an exemplary embodiment, the maximum clear aperture D corresponding to the maximum field of view angle of the optical lens on the first side of the first lens, the image height H corresponding to the maximum field of view angle of the optical lens, and the maximum field of view angle FOV of the optical lens may satisfy: 0.006 / ° < D / H / FOV ≤ 0.009 / °. Preferably, 0.007 / ° ≤ D / H / FOV ≤ 0.008 / °. By controlling this relationship, under the same ratio of image height to field of view, the maximum clear aperture of the lens can be effectively limited, which is convenient for realizing miniaturization of the lens.

[0143] In an exemplary embodiment, the maximum clear aperture D corresponding to the maximum field of view angle of the optical lens on the first side of the first lens, the image height H corresponding to the maximum field of view angle of the optical lens, and the total effective focal length F of the optical lens may satisfy: 0.28 ≤ D / H / F ≤ 0.45. Preferably, 0.33 ≤ D / H / F ≤ 0.38. By controlling this relationship, under the condition of a certain focal length, the lens can be provided with the characteristics of a large image height and a small aperture.

[0144] In an exemplary embodiment, the focal length F4 of the fourth lens and the combined focal length F123 of the first, second, and third lenses may satisfy: 0.137 ≤ F4 / F123 ≤ 2.456. Preferably, 0.15 ≤ F4 / F123 ≤ 2.2. By controlling this relationship, it is ensured that the diverging ability of the fourth lens matches the optical power of the combination of the first three lenses, so that the marginal rays are incident on the fourth lens with a moderate slope after passing through the first three lenses, avoiding a sudden increase in the ray height due to the strong convergence of the first three lenses and the strong divergence of the fourth lens, which is beneficial to improving the overall resolution of the optical lens.

[0145] The optical lens according to the above embodiment of the present application may employ multiple lenses, such as the seven lenses described above. By reasonably allocating the optical parameters of each lens, the optical lens realizes small aperture, miniaturization, high resolution, low sensitivity, large angular resolution, large field of view, long back focal length, small distortion, small principal light angle, high illuminance, and processability, and can be well matched with various application-side chips, such as in-vehicle chips, and can better suppress the vignetting phenomenon. The optical lens has good temperature performance, with small changes in the imaging effect at high and low temperatures and stable image quality. Therefore, the optical lens according to the above embodiment of the present application can better meet the requirements of, for example, in-vehicle applications.

[0146] Those skilled in the art should understand that the overall optical length TTL of the optical lens used above refers to the axial distance from the first side of the first lens to the imaging surface or the object source surface; the back focal length BFL of the optical lens refers to the axial distance from the second side of the seventh lens to the imaging surface or the object source surface; and the maximum field of view angle FOV of the optical lens is related to the image height H, which refers to the field of view angle corresponding to the image height H.

[0147] In addition, the present application focuses on protecting the lens architecture, and the lens surface type is not limited to spherical or aspherical; when focusing on the resolution quality, aspherical lenses can be used for all lenses. The lens material is also not limited to plastic and glass; when focusing on the temperature performance, glass lenses can be used for all lenses.

[0148] However, those skilled in the art should understand that without departing from the technical solutions claimed in the present application, the number of lenses constituting the optical lens can be changed to obtain the various results and advantages described in this specification. For example, although the seven-lens example is described in the embodiment, the optical lens is not limited to including seven lenses. If necessary, the optical lens may also include other numbers of lenses. The following further describes specific embodiments of the optical lens applicable to the above embodiment with reference to the drawings.

[0149] Embodiment 1

[0150] The following refers to Figure 1 Describe the optical lens according to Embodiment 1 of the present application. As Figure 1As shown in the figure, the optical lens sequentially includes, from the first side to the second side along the optical axis: a first lens L1, a second lens L2, a third lens L3, a fourth lens L4, a fifth lens L5, a sixth lens L6, and a seventh lens L7. The stop STO can be disposed between the third lens L3 and the fourth lens L4.

[0151] The first lens L1 has a negative focal power. Its first side S1 is convex, and its second side S2 is concave.

[0152] The second lens L2 has a negative focal power. Its first side S3 is convex, and its second side S4 is concave.

[0153] The third lens L3 has a positive focal power. Its first side S5 is convex, and its second side S6 is convex.

[0154] The fourth lens L4 has a negative focal power. Its first side S7 is convex, and its second side S8 is concave.

[0155] The fifth lens L5 has a positive focal power. Its first side S9 is concave, and its second side S10 is convex.

[0156] The sixth lens L6 has a positive focal power. Its first side S11 is convex, and its second side S12 is convex.

[0157] The seventh lens L7 has a positive focal power. Its first side S13 is convex, and its second side S14 is convex.

[0158] An image plane IMA is disposed on the second side of the optical lens. A filter IR and a protective glass CG are disposed between the seventh lens L7 and the image plane IMA. The filter IR has a first side S15 and a second side S16, and the protective glass CG has a first side S17 and a second side S18. When IMA is the imaging plane, light from the object sequentially passes through each surface and finally forms an image on the image plane IMA. When IMA is the light source plane, light from IMA sequentially passes through each surface and finally projects onto the object. Table 1 shows the basic parameter table of the optical lens of Embodiment 1. The unit of the radius of curvature and the thickness / distance is mm.

[0159] Table 1

[0160]

[0161] From Figure 2As can be seen, in Example 1, the RMS radii of the optical lens at the field angles of 0.00°, 8.00°, 16.00°, 24.00°, 32.00°, 40.00°, 46.75°, 56.00°, 64.50°, 72.00°, 79.60° and 85.50° are implemented as 13.675um, 13.701um, 13.852um, 13.741um, 13.717um, 13.387um, 12.933um, 12.437um, 14.644um, 20.194um, 27.553um and 34.358um in sequence. It is easy to know that the spot diffraction dispersion spot of the optical lens in Example 1 is small and the energy concentration is high. Therefore, the optical lens given in Example 1 has good imaging quality.

[0162] Example 2

[0163] The following refers to Figure 3 Describe the optical lens according to Embodiment 2 of the present application. As Figure 3 shown, compared with Example 1, the main difference in this embodiment is that the optical parameters such as the curvature radius of each lens surface and the lens thickness are different. Table 2 shows the basic parameter table of the optical lens in Example 2.

[0164] Table 2

[0165]

[0166] From Figure 4 As can be seen, in Example 2, the RMS radii of the optical lens at the field angles of 0.00°, 8.00°, 16.00°, 24.00°, 32.00°, 40.00°, 46.75°, 56.00°, 64.50°, 72.00°, 79.60° and 85.50° are implemented as 15.029um, 14.961um, 14.825um, 14.189um, 13.610um, 13.150um, 12.911um, 13.261um, 15.579um, 19.592um, 25.839um and 32.599um in sequence. It is easy to know that the spot diffraction dispersion spot of the optical lens in Example 2 is small and the energy concentration is high. Therefore, the optical lens given in Example 2 has good imaging quality.

[0167] Example 3

[0168] The following refers to Figure 5 Describe the optical lens according to Embodiment 3 of the present application. As Figure 5As shown, compared with Embodiment 1, the main differences in this embodiment are as follows: The optical parameters such as the curvature radius of each lens surface and the lens thickness are different; the second side surface S14 of the seventh lens L7 is a concave surface. Table 3 shows the basic parameter table of the optical lens of Embodiment 3.

[0169] Table 3

[0170]

[0171] From Figure 6 the perspective of, in Embodiment 3, the RMS radii of the optical lens at the field angles of 0.00°, 8.00°, 16.00°, 24.00°, 32.00°, 40.00°, 46.75°, 56.00°, 64.50°, 72.00°, 79.60° and 85.50° are respectively implemented as 9.824um, 9.558um, 9.291um, 10.030um, 11.716um, 13.536um, 14.420um, 14.418um, 14.562um, 21.242um, 33.114um and 45.230um. It can be easily seen that the spot diffraction dispersion spot of the optical lens in Embodiment 3 is relatively small and the energy concentration is high. Therefore, the optical lens given in Embodiment 3 has good imaging quality.

[0172] Embodiment 4

[0173] The following refers to Figure 7 to describe the optical lens according to Embodiment 4 of the present application. As Figure 7 shown, compared with Embodiment 1, the main differences in this embodiment are as follows: The optical parameters such as the curvature radius of each lens surface and the lens thickness are different; the second side surface S14 of the seventh lens L7 is a concave surface. Table 4 shows the basic parameter table of the optical lens of Embodiment 4.

[0174] Table 4

[0175]

[0176] From Figure 8As can be seen, in Example 4, the RMS radii of the optical lens at field angles of 0.00°, 8.00°, 16.00°, 24.00°, 32.00°, 40.00°, 46.75°, 56.00°, 64.50°, 72.00°, 79.60° and 85.50° are implemented as 10.371um, 10.136um, 9.784um, 10.012um, 10.841um, 11.949um, 12.651um, 13.213um, 14.352um, 21.222um, 33.230um and 45.390um in sequence. It is easy to know that the spot diffraction dispersion spot of the optical lens in Example 4 is small and the energy concentration is high. Therefore, the optical lens given in Example 4 has good imaging quality.

[0177] Example 5

[0178] The following refers to Figure 9 Describe the optical lens according to Example 5 of the present application. As Figure 9 shown, compared with Example 1, the main differences in this embodiment are: the optical parameters such as the curvature radius and lens thickness of each lens surface are different; the first side surface S13 of the seventh lens L7 is a concave surface. Table 5 shows the basic parameter table of the optical lens of Example 5.

[0179] Table 5

[0180]

[0181] From Figure 10 the perspective, in Example 5, the RMS radii of the optical lens at field angles of 0.00°, 8.00°, 16.00°, 24.00°, 32.00°, 40.00°, 46.75°, 56.00°, 64.50°, 72.00°, 79.60° and 85.50° are implemented as 13.061um, 12.608um, 11.651um, 11.142um, 11.665um, 12.887um, 13.780um, 14.530um, 16.435um, 23.418um, 34.402um and 45.168um in sequence. It is easy to know that the spot diffraction dispersion spot of the optical lens in Example 5 is small and the energy concentration is high. Therefore, the optical lens given in Example 5 has good imaging quality.

[0182] Example 6

[0183] The following refers to Figure 11 Describe the optical lens according to Example 6 of the present application. As Figure 11As shown, compared with Embodiment 1, the main differences in this embodiment are as follows: The optical parameters such as the radius of curvature of each lens surface and the lens thickness are different; the first side surface S13 of the seventh lens L7 is a concave surface. Table 6 shows the basic parameter table of the optical lens of Embodiment 6.

[0184] Table 6

[0185]

[0186] From Figure 12 the perspective of, in Embodiment 6, the RMS radii of the optical lens at the field angles of 0.00°, 8.00°, 16.00°, 24.00°, 32.00°, 40.00°, 46.75°, 56.00°, 64.50°, 72.00°, 79.60° and 85.50° are implemented as 13.761um, 13.314um, 12.377um, 11.863um, 12.350um, 13.608um, 14.401um, 14.779um, 16.902um, 23.860um, 34.608um and 45.805um in sequence. It is easy to know that the spot diffraction dispersion spot of the optical lens in Embodiment 6 is smaller and the energy concentration is high. Therefore, the optical lens given in Embodiment 6 has better imaging quality.

[0187] Embodiment 7

[0188] The following refers to Figure 13 to describe the optical lens according to Embodiment 7 of the present application. As Figure 13 shown, compared with Embodiment 1, the main differences in this embodiment are as follows: The optical parameters such as the radius of curvature of each lens surface and the lens thickness are different; the second side surface S12 of the sixth lens L6 is a concave surface. Table 7 shows the basic parameter table of the optical lens of Embodiment 7.

[0189] Table 7

[0190]

[0191] From Figure 14As can be seen, in Embodiment 7, the RMS radii of the optical lens at field angles of 0.00°, 8.00°, 16.00°, 24.00°, 32.00°, 40.00°, 46.75°, 56.00°, 64.50°, 72.00°, 79.60° and 85.50° are successively implemented as 11.230um, 11.023um, 10.793um, 11.061um, 11.584um, 12.251um, 12.992um, 14.500um, 16.046um, 22.146um, 33.141um and 45.301um. It is easy to know that the spot diffraction dispersion spot of the optical lens in Embodiment 7 is small and the energy concentration is high. Therefore, the optical lens given in Embodiment 7 has good imaging quality.

[0192] Embodiment 8

[0193] The following refers to Figure 15 Describe the optical lens according to Embodiment 8 of the present application. As Figure 15 shown, compared with Embodiment 1, the main differences in this embodiment are that the optical parameters such as the curvature radius and lens thickness of each lens surface are different; the second side surface S12 of the sixth lens L6 is a concave surface. Table 8 shows the basic parameter table of the optical lens of Embodiment 8.

[0194] Table 8

[0195]

[0196] From Figure 16 As can be seen, in Embodiment 8, the RMS radii of the optical lens at field angles of 0.00°, 8.00°, 16.00°, 24.00°, 32.00°, 40.00°, 46.75°, 56.00°, 64.50°, 72.00°, 79.60° and 85.50° are successively implemented as 11.038um, 10.861um, 10.669um, 10.940um, 11.429um, 12.073um, 12.832um, 14.368um, 15.974um, 21.917um, 32.623um and 45.018um. It is easy to know that the spot diffraction dispersion spot of the optical lens in Embodiment 8 is small and the energy concentration is high. Therefore, the optical lens given in Embodiment 8 has good imaging quality.

[0197] Embodiment 9

[0198] The following refers to Figure 17 Describe the optical lens according to Embodiment 9 of the present application. As Figure 17As shown, compared with Embodiment 1, the main differences in this embodiment are as follows: The optical parameters such as the curvature radius of each lens surface and the lens thickness are different; the first side surface S11 of the sixth lens L6 is a concave surface. Table 9 shows the basic parameter table of the optical lens of Embodiment 9.

[0199] Table 9

[0200]

[0201] From Figure 18 the perspective of, in Embodiment 9, the RMS radii of the optical lens at the field angles of 0.00°, 8.00°, 16.00°, 24.00°, 32.00°, 40.00°, 46.75°, 56.00°, 64.50°, 72.00°, 79.60° and 85.50° are respectively implemented as 11.073um, 11.079um, 11.185um, 11.432um, 11.364um, 11.269um, 11.611um, 13.364um, 14.927um, 20.489um, 31.110um and 42.222um. It can be easily known that the spot diffraction dispersion spot of the optical lens in Embodiment 9 is small and the energy concentration is high. Therefore, the optical lens given in Embodiment 9 has good imaging quality.

[0202] Embodiment 10

[0203] The following refers to Figure 19 to describe the optical lens according to Embodiment 10 of the present application. As Figure 19 shown, compared with Embodiment 1, the main differences in this embodiment are as follows: The optical parameters such as the curvature radius of each lens surface and the lens thickness are different; the first side surface S11 of the sixth lens L6 is a concave surface. Table 10 shows the basic parameter table of the optical lens of Embodiment 10.

[0204] Table 10

[0205]

[0206] From Figure 20As can be seen, in Embodiment 10, the RMS radii of the optical lens at the field angles of 0.00°, 8.00°, 16.00°, 24.00°, 32.00°, 40.00°, 46.75°, 56.00°, 64.50°, 72.00°, 79.60° and 85.50° are successively implemented as 10.348um, 10.759um, 11.333um, 11.970um, 11.867um, 11.255um, 11.111um, 12.918um, 15.893um, 22.031um, 32.769um and 44.014um. It is easy to know that the spot diffraction dispersion spot of the optical lens in Embodiment 10 is small and the energy concentration is high. Therefore, the optical lens given in Embodiment 10 has good imaging quality.

[0207] Embodiment 11

[0208] The following refers to Figure 21 Describe the optical lens according to Embodiment 11 of the present application. As Figure 21 shown, compared with Embodiment 1, the main differences in this embodiment are: the optical parameters such as the curvature radius of each lens surface and the lens thickness are different; the fifth lens has a negative optical power, and the first side of the fifth lens is convex and the second side is concave; the first side S11 of the sixth lens L6 is concave. Table 11 shows the basic parameter table of the optical lens of Embodiment 11.

[0209] Table 11

[0210]

[0211] From Figure 22 As can be seen, in Embodiment 11, the RMS radii of the optical lens at the field angles of 0.00°, 8.00°, 16.00°, 24.00°, 32.00°, 40.00°, 46.75°, 56.00°, 64.50°, 72.00°, 79.60° and 85.50° are successively implemented as 11.660um, 11.545um, 10.626um, 9.154um, 8.013um, 8.271um, 9.514um, 11.826um, 14.526um, 17.886um, 23.205um and 29.238um. It is easy to know that the spot diffraction dispersion spot of the optical lens in Embodiment 11 is small and the energy concentration is high. Therefore, the optical lens given in Embodiment 11 has good imaging quality.

[0212] Embodiment 12

[0213] The following refers to Figure 23 Describe the optical lens according to Embodiment 12 of the present application. As Figure 23As shown, compared with Embodiment 1, the main differences in this embodiment are as follows: The optical parameters such as the curvature radius of each lens surface and the lens thickness are different; the second side surface S14 of the seventh lens L7 is a concave surface. Table 12 shows the basic parameter table of the optical lens of Embodiment 12.

[0214] Table 12

[0215]

[0216] From Figure 24 the perspective of, the RMS radii of the optical lens in Embodiment 12 at the field angles of 0.00°, 8.00°, 16.00°, 24.00°, 32.00°, 40.00°, 46.75°, 56.00°, 64.50°, 72.00°, 79.60° and 85.50° are successively implemented as 12.505um, 12.239um, 11.806um, 11.850um, 12.665um, 13.789um, 14.462um, 14.977um, 17.034um, 22.984um, 35.747um and 43.343um. It is easy to know that the spot diffraction dispersion spot of the optical lens in Embodiment 12 is small and the energy concentration is high. Therefore, the optical lens given in Embodiment 12 has good imaging quality.

[0217] Embodiment 13

[0218] The following refers to Figure 25 to describe the optical lens according to Embodiment 13 of the present application. As Figure 25 shown, compared with Embodiment 1, the main differences in this embodiment are as follows: The optical parameters such as the curvature radius of each lens surface and the lens thickness are different; the second side surface S14 of the seventh lens L7 is a concave surface. Table 13 shows the basic parameter table of the optical lens of Embodiment 13.

[0219] Table 13

[0220]

[0221] From Figure 26As can be seen, the RMS radii of the optical lens in Embodiment 13 at field angles of 0.00°, 8.00°, 16.00°, 24.00°, 32.00°, 40.00°, 46.75°, 56.00°, 64.50°, 72.00°, 79.60° and 85.50° are implemented as 10.635um, 10.323um, 9.821um, 10.351um, 11.676um, 12.590um, 12.701um, 13.363um, 15.957um, 21.420um, 33.348um and 44.758um in sequence. It is easy to know that the spot diffraction dispersion spot of the optical lens in Embodiment 13 is small and the energy concentration is high. Therefore, the optical lens given in Embodiment 13 has good imaging quality.

[0222] Embodiment 14

[0223] The following refers to Figure 27 Describe the optical lens according to Embodiment 14 of the present application. As Figure 27 shown, compared with Embodiment 1, the main differences in this embodiment are as follows: the optical parameters such as the curvature radius of each lens surface and the lens thickness are different; the fifth lens has a negative optical power, and the first side of the fifth lens is convex and the second side is concave; the first side S11 of the sixth lens L6 is concave. Table 14 shows the basic parameter table of the optical lens in Embodiment 14.

[0224] Table 14

[0225]

[0226] From Figure 28 the perspective of, the RMS radii of the optical lens in Embodiment 14 at field angles of 0.00°, 8.00°, 16.00°, 24.00°, 32.00°, 40.00°, 46.75°, 56.00°, 64.50°, 72.00°, 79.60° and 85.50° are implemented as 12.531um, 12.737um, 12.884um, 12.301um, 11.625um, 10.867um, 10.942um, 12.197um, 14.761um, 18.483um, 24.541um and 31.667um in sequence. It is easy to know that the spot diffraction dispersion spot of the optical lens in Embodiment 14 is small and the energy concentration is high. Therefore, the optical lens given in Embodiment 14 has good imaging quality.

[0227] Embodiment 15

[0228] The following refers to Figure 29 Describe the optical lens according to Embodiment 15 of the present application. As Figure 29As shown, compared with Embodiment 1, the main differences of this embodiment are as follows: the optical parameters such as the curvature radius of each lens surface and the lens thickness are different; the fifth lens has a negative optical power, and the first side of the fifth lens is convex and the second side is concave; the first side S11 of the sixth lens L6 is concave. Table 15 shows the basic parameter table of the optical lens of Embodiment 15.

[0229] Table 15

[0230]

[0231] From Figure 30 the perspective of, in Embodiment 15, the RMS radii of the optical lens at the field angles of 0.00°, 8.00°, 16.00°, 24.00°, 32.00°, 40.00°, 46.75°, 56.00°, 64.50°, 72.00°, 79.60° and 85.50° are successively implemented as 12.604um, 12.509um, 12.402um, 12.470um, 12.499um, 11.765um, 11.701um, 12.666um, 15.734um, 20.781um, 27.222um and 32.926um. It is easy to know that the spot diffraction blur of the optical lens in Embodiment 15 is small and the energy concentration is high. Therefore, the optical lens given in Embodiment 15 has good imaging quality.

[0232] Comparative Example 1

[0233] The following refers to Figure 31 to describe the optical lens of Comparative Example 1 according to the present application. As Figure 31 shown, compared with Embodiments 1 to 15, the main difference of this comparative example is that: the surface type of the fourth lens is different. From the foregoing content, it can be known that the first side S7 of the fourth lens L4 in Embodiments 1 to 15 is convex and the second side S8 is concave, while the first side S7 of the fourth lens L4 in Comparative Example 1 is concave and the second side S8 is convex. Table 16 shows the basic parameter table of the optical lens of Comparative Example 1.

[0234] Table 16

[0235]

[0236] It can be easily obtained from Table 16 that the total optical length TTL of the optical lens in Comparative Example 1 reaches 30.7964mm, while the maximum TTL of Embodiments 1 to 15 is 22.4mm, which is much smaller than the TTL of Comparative Example 1. In addition, from Figure 32As can be seen, the RMS radii of the optical lens in Comparative Example 1 at the field angles of 0.00°, 8.00°, 16.00°, 24.00°, 32.00°, 40.00°, 46.75°, 56.00°, 64.50°, 72.00°, 79.60°, and 85.50° were implemented as 12.270um, 11.896um, 11.690um, 11.162um, 9.824um, 9.033um, 9.272um, 12.165um, 17.305um, 23.905um, 34.006um, and 45.929um respectively. It is easy to know that the imaging performance of Comparative Example 1 is close to that of Examples 1 to 15. Thus, in the optical lens architecture provided in this application, the surface shape of the fourth lens L4 has a greater impact on the volume of the optical lens. Setting the first side S7 of the fourth lens L4 as a convex surface and the second side S8 as a concave surface can significantly reduce the total optical length TTL of the optical lens, which is beneficial to the miniaturization design of the terminal device.

[0237] Comparative Example 2

[0238] The following refers to Figure 33 to describe the optical lens of Comparative Example 2 according to this application. As Figure 33 shown, compared with Examples 1 to 15, the main difference in this comparative example is that F1 / F3 of Examples 1 to 15 all satisfy the relational expression -0.9 ≤ F1 / F3 ≤ -0.5, while F1 / F3 of Comparative Example 2 is -0.417, exceeding the upper limit of the above conditional expression. Table 17 shows the basic parameter table of the optical lens of Comparative Example 2.

[0239] Table 17

[0240]

[0241] From Figure 34 the aspect of view, the RMS radii of the optical lens in Comparative Example 2 at the field angles of 0.00°, 8.00°, 16.00°, 24.00°, 32.00°, 40.00°, 46.75°, 56.00°, 64.50°, 72.00°, 79.60°, and 85.50° were implemented as 13.091um, 13.312um, 14.130um, 15.046um, 16.379um, 18.258um, 20.001um, 21.440um, 20.291um, 29.525um, 42.144um, and 50.897um respectively. It is easy to know that the spot diffraction dispersion spot of the optical lens in Comparative Example 2 is larger than that of Examples 1 to 15, and the energy concentration is poor.

[0242] Therefore, based on the optical architecture provided in the embodiments of the present application, if F1 / F3 is greater than -0.5, the divergence state of the light rays exiting from the third lens L3 to the aperture is too strong, such that the light rays exiting from the third lens L3 cannot be incident on the third lens L4 relatively smoothly, resulting in excessive aberration and affecting the imaging quality.

[0243] Comparative Example 3

[0244] The following refers to Figure 35 to describe the optical lens according to Comparative Example 3 of the present application. As Figure 35 shown, compared with Embodiments 1 to 15, the main difference in this comparative example is that: for Embodiments 1 to 15, F1 / F3 all satisfy the relational expression -0.9 ≤ F1 / F3 ≤ -0.5, while for Comparative Example 2, F1 / F3 = -1.097, exceeding the lower limit of the above conditional expression. Table 18 shows the basic parameter table of the optical lens of Comparative Example 3.

[0245] Table 18

[0246]

[0247] Combined with Table 19-1 and Table 19-2 in the following text, it can be seen that for the optical lens in Comparative Example 3, the entrance pupil diameter ENPD is equal to 2.657, while for the optical lenses in the remaining embodiments, the entrance pupil diameter ENPD is greater than 2.888. It can be seen that based on the optical architecture provided in the embodiments of the present application, if F1 / F3 is less than -0.9, the divergence state of the light rays exiting from L3 to the aperture is relatively weak, which is not conducive to increasing the entrance pupil diameter of the optical lens.

[0248] Table 19-1 and Table 19-2 give the basic parameters of the optical lenses in Embodiments 1 - 15 and Comparative Examples 1 - 3, such as F, ENPD, TTL, H, FOV, θ, D, BFL, F1, F2, F3, F4, F5, F6, F7, R1, R3, R5, R6, R8, R9, R10, CT6, CT7, F13, T_DIR, and L_stop.

[0249] Table 19-1

[0250]

[0251] Table 19-2

[0252]

[0253] In summary, the relational expressions in Embodiments 1 - 15 and Comparative Examples 1 - 3 satisfy the relationships shown in Table 20-1 and Table 20-2.

[0254] Table 20-1

[0255]

[0256] Table 20-2

[0257]

[0258] The present application also provides an electronic device, which includes at least one of the optical lens, the imaging element, and the light source in the above exemplary embodiments; wherein, the imaging element is configured to convert the optical image or optical information formed by the optical lens into an electrical signal; wherein, the light source is located on the second side of the optical lens, and the light emitted by the light source is projected to the first side of the optical lens after passing through the optical lens, and an image or an illuminated area is formed on the first side of the optical lens.

[0259] It should be noted that the electronic device can be, but is not limited to, implemented as a lidar, a camera, or a projection lamp. Correspondingly, the optical lens can be used as a light-emitting lens or a light-receiving lens. For example, when the electronic device is a camera, the electronic device can include the optical lens in the above exemplary embodiments and a photosensor configured to convert the optical image formed by the optical lens into an electrical signal. The photosensor is disposed on the second side of the optical lens, for example, on the imaging surface, and can be implemented as a charge-coupled device (CCD) or a complementary metal-oxide-semiconductor device (CMOS). The light from the first side forms an image on the second side after passing through the optical lens.

[0260] When the electronic device is a projection lamp, the electronic device can include the optical lens in the above exemplary embodiments and a light source, and the light source is located on the second side of the optical lens. The light emitted by the light source is projected to the first side of the optical lens after passing through the optical lens, and an image or an illuminated area is formed on the first side.

[0261] In addition, when the electronic device is a lidar, the receiving-end lens of the lidar can be implemented as the above optical lens, the first side of the optical lens is the object side, and the second side of the optical lens is the image side.

[0262] It should be noted that the electronic device implemented as a lidar may include a first device and a second device. The first device may be implemented as a lidar transmitting device, and the second device may be implemented as a lidar receiving device. The first device may include the optical lens and the light source in the above exemplary embodiments. The light source is located on the second side of the optical lens. The light emitted by the light source is projected to the first side of the optical lens after passing through the optical lens, and an image or an illuminated area is formed on the first side. The second device may include the optical lens and the photosensor for converting the optical image formed by the optical lens into an electrical signal in the above exemplary embodiments. The photosensor is disposed on the second side of the optical lens (for example, disposed on the imaging surface). The photosensor may be implemented as a charge-coupled device (CCD) or a complementary metal-oxide-semiconductor device (CMOS). The light from the first side forms an image on the second side after passing through the optical lens.

[0263] It is worth mentioning that the present application also provides a vehicle, which may include the above electronic device for acquiring information.

[0264] The above description is only a preferred embodiment of the present application and an explanation of the applied technical principles. Those skilled in the art should understand that the scope involved in the present application is not limited to the technical solutions formed by the specific combination of the above technical features, and should also cover other technical solutions formed by any combination of the above technical features or their equivalent features without departing from the concept. For example, the technical solutions formed by mutually replacing the above features with the (but not limited to) technical features having similar functions disclosed in the present application.

Claims

1. An optical lens, characterized in that, In sequence from the first side to the second side along the optical axis, it includes: A first lens with a negative focal power, the first side surface of the first lens is convex, and the second side surface of the first lens is concave; A second lens with a negative focal power; A third lens with a positive focal power, both the first side surface and the second side surface of the third lens are convex; A fourth lens with a negative focal power; A fifth lens with a focal power; A sixth lens with a positive focal power; A seventh lens with a positive focal power; The number of lenses with focal power in the optical lens is seven; the optical lens further includes a diaphragm disposed between the third lens and the fourth lens; The optical lens satisfies: -0.9 ≤ F1 / F3 ≤ -0.5 and 1.7 ≤ F3 / F ≤ 2.8; Wherein, F1 is the focal length of the first lens; F3 is the focal length of the third lens; F is the total effective focal length of the optical lens.

2. The optical lens according to claim 1, wherein The radius of curvature R9 of the first side surface of the fifth lens and the radius of curvature R10 of the second side surface of the fifth lens satisfy: 1 ≤ R9 / R10 ≤ 4.

2.

3. The optical lens according to claim 1, wherein The radius of curvature R1 of the first side surface of the first lens and the radius of curvature R3 of the first side surface of the second lens satisfy: 0.5 ≤ R1 / R3 ≤ 3.

4. The optical lens according to claim 1, wherein The optical lens satisfies at least one of the following relationships: 0.24 ≤ L_stop / TTL ≤ 0.41 and -0.3 ≤ F3 / F4 ≤ -0.17; Wherein, L_stop is the distance between the diaphragm and the first side surface of the first lens on the optical axis; TTL is the overall optical length of the optical lens; F3 is the focal length of the third lens; F4 is the focal length of the fourth lens.

5. The optical lens according to claim 1, wherein The focal length F1 of the first lens and the total effective focal length F of the optical lens satisfy: -1.9 ≤ F1 / F ≤ -1.

2.

6. The optical lens according to claim 1 or claim 5, characterized in that, The focal length F2 of the second lens and the total effective focal length F of the optical lens satisfy: -9 ≤ F2 / F ≤ -5.

7. The optical lens according to claim 1, wherein The focal length F6 of the sixth lens and the total effective focal length F of the optical lens satisfy: 2.3 ≤ F6 / F ≤ 12.

8. The optical lens according to claim 1 or claim 7, characterized in that, The focal length F7 of the seventh lens and the total effective focal length F of the optical lens satisfy: 2.7 ≤ F7 / F ≤ 15.

9. The optical lens according to any one of claims 1 to 5 and claim 7, characterized in that The optical lens satisfies at least one of the following relationships: 0.7 ≤ (F×θ) / D ≤ 1.1, 0.1 ≤ BFL / TTL ≤ 0.3 and 0.14 ≤ T_DIR / TTL ≤ 0.3; Wherein, F is the total effective focal length of the optical lens; θ is the radian value of the maximum field of view angle of the optical lens; D is the clear aperture corresponding to the maximum field of view angle of the optical lens on the first side surface of the first lens; BFL is the back focal length of the optical lens; TTL is the overall optical length of the optical lens; T_DIR is the sum of the air gaps between all adjacent lenses of the optical lens on the optical axis.

10. The optical lens according to any one of claims 1 to 5 and claim 7, characterized in that, The focal length F1 of the first lens and the focal length F2 of the second lens satisfy: -0.26 / mm ≤ 1 / F1 + 1 / F2 ≤ -0.17 / mm.

11. The optical lens according to any one of claims 1 to 5 and claim 7, characterized in that, The optical lens satisfies at least one of the following relationships: 2.5 ≤ F5 / F ≤ 6, 0.09 / mm ≤ 1 / F6 + 1 / F7 ≤ 0.2 / mm, and -2.1 ≤ F4 / TTL ≤ -1.2; or, the optical lens satisfies at least one of the following relationships: F5 / F ≤ -25, 0.09 / mm ≤ 1 / F6 + 1 / F7 ≤ 0.2 / mm, and -2.1 ≤ F4 / TTL ≤ -1.2; Wherein, F5 is the focal length of the fifth lens; F is the total effective focal length of the optical lens; F6 is the focal length of the sixth lens; F7 is the focal length of the seventh lens; F4 is the focal length of the fourth lens; and TTL is the overall optical length of the optical lens.

12. The optical lens according to any one of claims 1 to 5 and claim 7, characterized in that, The central thickness CT6 of the sixth lens on the optical axis and the central thickness CT7 of the seventh lens on the optical axis satisfy: 0.47 ≤ CT6 / CT7 ≤ 1.

85.

13. The optical lens according to any one of claims 1 to 5 and claim 7, characterized in that, The overall optical length TTL of the optical lens and the clear aperture D corresponding to the maximum field of view angle of the optical lens on the first side of the first lens satisfy: 1.4 ≤ TTL / D ≤ 2.

2.

14. The optical lens according to any one of claims 1 to 5 and claim 7, characterized in that The first side of the second lens is convex, and the second side of the second lens is concave; the first side of the fourth lens is convex, and the second side of the fourth lens is concave.

15. The optical lens according to any one of claims 1 to 5 and claim 7, characterized in that The fifth lens has a positive optical power. The first side of the fifth lens is concave, and the second side of the fifth lens is convex. Moreover, the focal length F5 of the fifth lens and the total effective focal length F of the optical lens satisfy: 2.5 ≤ F5 / F ≤ 6; Or, the fifth lens has a negative optical power. The first side of the fifth lens is convex, and the second side of the fifth lens is concave. Moreover, the focal length F5 of the fifth lens and the total effective focal length F of the optical lens satisfy: F5 / F ≤ -25.

16. The optical lens according to any one of claims 1 to 5 and claim 7, characterized in that, Both the first side and the second side of the sixth lens are convex; Or, the first side of the sixth lens is convex, and the second side of the sixth lens is concave; Or, the first side of the sixth lens is concave, and the second side of the sixth lens is convex.

17. The optical lens according to any one of claims 1 to 5 and claim 7, characterized in that, Both the first side and the second side of the seventh lens are convex; Or, the first side of the seventh lens is convex, and the second side of the seventh lens is concave; Or, the first side of the seventh lens is concave, and the second side of the seventh lens is convex.

18. The optical lens according to any one of claims 1 to 5 and claim 7, characterized in that, The optical lens satisfies at least one of the following relationships: -0.81 ≤ F1 / F3 ≤ -0.58, 1.9 ≤ F3 / F ≤ 2.5, 1 ≤ R9 / R10 ≤ 3.7, 0.55 ≤ R1 / R3 ≤ 2.7, 0.29 ≤ L_stop / TTL ≤ 0.36, -0.27 ≤ F3 / F4 ≤ -0.17, -1.7 ≤ F1 / F ≤ -1.4, -7.5 ≤ F2 / F ≤ -6, 2.5 ≤ F6 / F ≤ 11, 3 ≤ F7 / F ≤ 13, 0.8 ≤ (F × θ) / D ≤ 0.95, 0.11 ≤ BFL / TTL ≤ 0.28, 0.16 ≤ T_DIR / TTL ≤ 0.27, -0.23 / mm ≤ 1 / F1 + 1 / F2 ≤ -0.2 / mm, 3.0 ≤ F5 / F ≤ 5, 0.1 / mm ≤ 1 / F6 + 1 / F7 ≤ 0.19 / mm, -1.9 ≤ F4 / TTL ≤ -1.4, 0.5 ≤ CT6 / CT7 ≤ 1.7, and 1.6 ≤ TTL / D ≤ 1.9; Alternatively, the optical lens satisfies at least one of the following relationships: -0.81 ≤ F1 / F3 ≤ -0.58, 1.9 ≤ F3 / F ≤ 2.5, 1 ≤ R9 / R10 ≤ 3.7, 0.55 ≤ R1 / R3 ≤ 2.7, 0.29 ≤ L_stop / TTL ≤ 0.36, -0.27 ≤ F3 / F4 ≤ -0.17, -1.7 ≤ F1 / F ≤ -1.4, -7.5 ≤ F2 / F ≤ -6, 2.5 ≤ F6 / F ≤ 11, 3 ≤ F7 / F ≤ 13, 0.8 ≤ (F × θ) / D ≤ 0.95, 0.11 ≤ BFL / TTL ≤ 0.28, 0.16 ≤ T_DIR / TTL ≤ A, -0.23 / mm ≤ 1 / F1 + 1 / F2 ≤ -0.2 / mm, -100 ≤ F5 / F ≤ -25, 0.1 / mm ≤ 1 / F6 + 1 / F7 ≤ 0.19 / mm, -1.9 ≤ F4 / TTL ≤ -1.4, 0.5 ≤ CT6 / CT7 ≤ 1.7, and 1.6 ≤ TTL / D ≤ 1.9; Wherein, F1 is the focal length of the first lens; F3 is the focal length of the third lens; F is the total effective focal length of the optical lens; R9 is the curvature radius of the first side surface of the fifth lens; R10 is the curvature radius of the second side surface of the fifth lens; R1 is the curvature radius of the first side surface of the first lens; R3 is the curvature radius of the first side surface of the second lens; L_stop is the distance between the aperture stop and the first side surface of the first lens on the optical axis; TTL is the overall optical length of the optical lens; F4 is the focal length of the fourth lens; F2 is the focal length of the second lens; F6 is the focal length of the sixth lens; F7 is the focal length of the seventh lens; θ is the radian value of the maximum field of view angle of the optical lens; D is the clear aperture corresponding to the maximum field of view angle of the optical lens on the first side surface of the first lens; BFL is the back focal length of the optical lens; T_DIR is the sum of the air gaps between all adjacent lenses in the optical lens on the optical axis; F5 is the focal length of the fifth lens; CT6 is the central thickness of the sixth lens on the optical axis; CT7 is the central thickness of the seventh lens on the optical axis.

19. An electronic device, characterized in that, Comprising: The optical lens according to any one of claims 1 to 18; And At least one of an imaging element and a light source; Wherein, the imaging element is configured to convert the optical image or optical information formed by the optical lens into an electrical signal; Wherein, the light source is located on the second side of the optical lens, and the light emitted by the light source is projected to the first side of the optical lens after passing through the optical lens, and an image or an illuminated area is formed on the first side of the optical lens.

Images