Optical lenses and electronic equipment

Abstract

The present application discloses an optical lens and an electronic device. The optical lens includes a first lens group, an aperture, and a second lens group in order from the first side to the second side along the optical axis. The first lens group includes: a first lens with negative optical power; and a second lens with positive optical power, and the first side surface of the second lens is a convex surface. The second lens group includes: a third lens with optical power; a fourth lens with optical power, and the second side surface of the fourth lens is a convex surface; and a fifth lens with optical power, and at least one side surface of the fifth lens has a reverse curve. The focal length value F of the entire group of optical lenses, the distance TTL from the center of the first side surface of the first lens to the imaging surface of the optical lens on the optical axis, the focal length value F1 of the first lens, the focal length value F3 of the third lens, the focal length value F4 of the fourth lens, and the distance d12 from the second side surface of the first lens to the first side surface of the second lens on the optical axis meet the following requirements: ‑6≤F1 / F<0, |F3 / F|≥1.8, d12 / TTL≤0.05, and F4 / F≤5.

Description

Technical Field

[0001] The present application relates to the field of optical elements, and more specifically, to an optical lens and an electronic device. Background Art

[0002] In recent years, with the rapid development of automobile assisted driving technology, optical lenses have been used more and more widely in automobiles.

[0003] At present, due to various considerations such as safety, higher requirements are put forward for the performance and structure of vehicle-mounted optical lenses. For example, due to the iteration of the requirements for lens placement, the installation position of the lens is limited, and the demand for miniaturization of the lens is becoming increasingly intense. At the same time, the demand for large image planes and small apertures is also increasing. In order to achieve higher pixel requirements and improve resolution capabilities, 6, 7 or even more lens structures are usually selected, but this will seriously affect the miniaturization of the lens. For example, due to the complexity of the actual detection situation, the lens needs to have a better recognition ability for objects of different colors, so the chromatic aberration of the lens itself is required to be high. In order to adapt to more abundant application scenarios, it has gradually become an urgent need to reduce the imaging problems such as lens chromatic aberration, astigmatism, and distortion. In addition, consumers' demand for in-vehicle video calls is also constantly developing, requiring lenses to meet the levels of high clarity, high contrast and high brightness under visible light to present the picture. In addition, this type of optical lens has high requirements for stability to avoid the lens performance degradation caused by high and low temperature differences, affecting the use effect.

[0004] Therefore, how to make optical lenses have both high resolution and miniaturization, and further achieve characteristics such as large imaging size, small aperture and good temperature performance to meet the increasingly high performance requirements of automotive applications has always been the goal that lenses in this field continue to pursue. Summary of the invention

[0005] On one hand, the present application provides an optical lens. The optical lens includes a first lens group, an aperture, and a second lens group in order from the first side to the second side along the optical axis; the first lens group includes: a first lens with negative optical power; and a second lens with positive optical power, and the first side surface of the second lens is a convex surface. The second lens group includes: a third lens with optical power; a fourth lens with optical power, and the second side surface of the fourth lens is a convex surface; and a fifth lens with optical power, and at least one side surface of the fifth lens has an inverse curve. The combined focal length value of the first lens and the second lens is positive; the number of lenses with optical power in the optical lens is five.

[0006] In one embodiment, the focal length value F1 of the first lens and the focal length value F of the entire optical lens group satisfy: -6≤F1 / F<0.

[0007] In one embodiment, the focal length value F3 of the third lens and the focal length value F of the entire optical lens group satisfy: |F3 / F|≥1.8.

[0008] In one embodiment, the focal length value F4 of the fourth lens and the focal length value F of the entire optical lens group satisfy: F4 / F≤5.

[0009] In one embodiment, a distance d12 from the second side surface of the first lens to the first side surface of the second lens on the optical axis and a distance TTL from the center of the first side surface of the first lens to the imaging surface of the optical lens on the optical axis satisfy: d12 / TTL≤0.05.

[0010] In one embodiment, the first side surface of the first lens is a concave surface, and the second side surface is a convex surface.

[0011] In one embodiment, the first side surface of the first lens is convex, and the second side surface is concave.

[0012] In one embodiment, the second side surface of the second lens is a concave surface or a convex surface.

[0013] In one embodiment, the third lens has negative optical power, and its first side surface is concave and its second side surface is convex; or its first side surface is concave and its second side surface is concave.

[0014] In one embodiment, the third lens has positive optical power, a first side surface thereof is convex, and a second side surface thereof is concave.

[0015] In one embodiment, the fourth lens has positive optical power, and its first side surface is concave and its second side surface is convex; or its first side surface is convex and its second side surface is convex.

[0016] In one embodiment, the fourth lens has negative optical power, and its first side surface is concave and its second side surface is convex.

[0017] In one embodiment, the fifth lens has positive optical power, a first side surface thereof is convex, and a second side surface thereof is concave.

[0018] In one embodiment, the fifth lens has negative optical power, and its first side surface is convex and its second side surface is concave; or its first side surface is concave and its second side surface is concave.

[0019] In one embodiment, the entire focal length value F of the optical lens and the distance TTL from the center of the first side surface of the first lens to the imaging surface of the optical lens on the optical axis satisfy: TTL / F≤3.

[0020] In one embodiment, the focal length value F2 of the second lens and the focal length value F of the entire optical lens group satisfy: F2 / F≤2.

[0021] In one embodiment, the focal length value F3 of the third lens and the focal length value F2 of the second lens satisfy: |F3| / F2≥1.5.

[0022] In one embodiment, the radius of curvature R52 of the second side surface of the fifth lens and the focal length F of the entire optical lens group satisfy: R52 / F≤12.

[0023] In one embodiment, the focal length value F1 of the first lens and the focal length value F of the entire optical lens set satisfy: -5.5≤F1 / F<-0.5.

[0024] In one embodiment, a curvature radius R11 of the first side surface of the first lens and a curvature radius R12 of the second side surface of the first lens satisfy: 0.1≤R11 / R12≤5.

[0025] In one embodiment, the focal length F1 of the first lens and the curvature radius R21 of the first side surface of the second lens satisfy: |F1 / R21|≥3.

[0026] In one embodiment, the maximum light clearance aperture D of the first side surface of the first lens, the maximum field of view FOV of the optical lens, and the image height H corresponding to the maximum field of view of the optical lens satisfy: D / H / FOV×180≤3.6.

[0027] In one embodiment, the vector height value Sag31 corresponding to the maximum clear aperture of the first side surface of the third lens, the vector height value Sag32 corresponding to the maximum clear aperture of the second side surface of the third lens, and the center thickness d31 of the third lens on the optical axis satisfy: |Sag31-Sag32| / d31≤0.44.

[0028] In one embodiment, the combined focal length value F12 of the first lens and the second lens and the entire focal length value F of the optical lens group satisfy: F12 / F≤3.

[0029] In one embodiment, the focal length value F4 of the fourth lens and the focal length value F of the entire optical lens group satisfy: F4 / F≤3.

[0030] In one embodiment, the maximum field of view FOV of the optical lens satisfies: 40°≤FOV≤100°.

[0031] In one embodiment, the focal length value F5 of the fifth lens and the focal length value F of the entire optical lens group satisfy: F5 / F≥10.

[0032] In one embodiment, the focal length value F5 of the fifth lens and the focal length value F of the entire optical lens group satisfy: -6≤F5 / F<0.

[0033] In one embodiment, the optical lens satisfies at least one of the following conditions: TTL / F≤2.5; F2 / F≤1.5; 0.4≤F2 / F≤1.2; |F3| / F2≥2; -10≤F3 / F2≤-1.5; d12 / TTL≤0.02; d12 / TTL≤0.015; d45 / TTL≤0.02; d45 / TTL≤0.015; -5≤F5 / F≤-0.1; F5 / F≥12; R52 / F≤10; 0.1≤R52 / F≤9; H / D52≥0.75; 0.9≤H / D52≤1.5; 0. 15≤R11 / R12≤4; TTL / H≤3; 0.5≤TTL / H≤2; |F1 / R21|≥4; 4.5≤|F1 / R21|≤12; |R21 / R22|≤0.3; |R21 / R22|≤0.2; D / H / FOV×180≤2.7 ;|F3 / F|≥2;F3 / F≤-1.8;-10≤F3 / F≤-2;|Sag31-Sag32| / d31≤0.38;|arctan(Sag21 / (D21 / 2))| / |arctan(Sag22 / (D22 / 2))|≥ 3;5≤|arctan(Sag21 / (D21 / 2))| / |arctan(Sag22 / (D22 / 2))|≤30;0.4≤F / H≤2;0.5≤F / H≤1.5;0.5≤(H / 2) / (F×tan(θ / 2))≤2;0 .7≤(H / 2) / (F×tan(θ / 2))≤1.5; F / ENPD≤2.2; F / ENPD≤2.1; F12 / F≤2; 0.3≤F12 / F≤1.5; 0.1≤F4 / F≤2; -1≤F4 / F3; -0.8≤F4 / F3≤-0 .1; BFL / TTL≥0.1; 0.15≤BFL / TTL≤4; (d31+d41+d51) / TTL≤0.5; 0.15≤(d31+d41+d51) / TTL≤0.43; d23 / F2≥0.15; 0.17≤d23 / F2 ≤0.4; 35°≤(FOV×F) / H≤70°; 37°≤(FOV×F) / H≤66°; TTL / H / FOV×180≤5.5; 2.5≤TTL / H / FOV×180≤5; 0.75≤(1 / F1+1 / F2) / (1 / F); 0.8≤(1 / F1+1 / F2) / (1 / F)≤2; FOV / H≤15; FOV / H≤12; 50°≤FOV≤80°, wherein TTL is the distance from the center of the first side surface of the first lens to the imaging surface of the optical lens on the optical axis, F is the focal length of the entire optical lens set, F1 is the focal length of the first lens, F2 is the focal length of the second lens, F3 is the focal length of the third lens, d12 is the distance from the second side surface of the first lens to the first side surface of the second lens on the optical axis, d45 is the distance from the second side surface of the fourth lens to the imaging surface of the optical lens on the optical axis, The distance from the second side surface to the first side surface of the fifth lens on the optical axis, R52 is the curvature radius of the second side surface of the fifth lens, D52 is the maximum clear aperture of the second side surface of the fifth lens, H is the image height corresponding to the maximum field of view of the optical lens, R11 is the curvature radius of the first side surface of the first lens, R12 is the curvature radius of the second side surface of the first lens, R21 is the curvature radius of the first side surface of the second lens, R22 is the curvature radius of the second side surface of the second lens, D is the maximum clear aperture of the first side surface of the first lens, and FOV is The maximum field of view of the optical lens, Sag31 is the sag value corresponding to the maximum clear aperture of the first side of the third lens, Sag32 is the sag value corresponding to the maximum clear aperture of the second side of the third lens, Sag21 is the sag value corresponding to the maximum clear aperture of the first side of the second lens, Sag22 is the sag value corresponding to the maximum clear aperture of the second side of the second lens, D21 is the maximum clear aperture of the first side of the second lens, D22 is the maximum clear aperture of the second side of the second lens, θ is the arc value corresponding to the maximum field of view of the optical lens, F12 is the combined focal length of the first lens and the second lens, F4 is the focal length of the fourth lens, BFL is the distance from the center of the second side of the fifth lens to the imaging surface of the optical lens on the optical axis, d31 is the center thickness of the third lens on the optical axis, d41 is the center thickness of the fourth lens on the optical axis, d51 is the center thickness of the fifth lens on the optical axis, d23 is the distance from the second side of the second lens to the first side of the third lens on the optical axis, and ENPD is the entrance pupil diameter of the optical lens. .

[0034] Another aspect of the present application provides an electronic device, which includes the optical lens provided by the present application and an imaging element for converting an optical image formed by the optical lens into an electrical signal.

[0035] The optical lens according to the embodiment of the present application includes five lenses with optical focal length, which are the first lens to the fifth lens arranged in sequence from the first side to the second side along the optical axis. The focal length value F1 of the first lens and the focal length value F of the entire group of the optical lens satisfy: -6≤F1 / F<0, the first lens is controlled to be negative and the focal length value is small; the focal length value of the second lens is positive; the distance d12 from the second side of the first lens to the first side of the second lens on the optical axis and the distance TTL from the center of the first side of the first lens to the imaging surface of the optical lens on the optical axis satisfy: d12 / TTL≤0.05. The focal length value F3 of the third lens and the focal length value F of the entire group of the optical lens satisfy: |F3 / F|≥1.8, and at least one side of the fifth lens has a reverse curve, so that the optical lens has the characteristics of miniaturization, small front aperture, high resolution and large image surface.

[0036] The optical lens of the present application optimizes the shape, optical focal length, thickness and spacing of each lens, so that the optical lens has the characteristics of miniaturization, high resolution, small front aperture and large image surface. BRIEF DESCRIPTION OF THE DRAWINGS

[0037] Other features, purposes and advantages of the present utility model will become more apparent through the detailed description of the following embodiments in conjunction with the accompanying drawings. In the accompanying drawings:

[0038] Figure 1 is a schematic structural diagram of an optical lens according to Example 1 of the present application;

[0039] Figure 2 is a schematic structural diagram of an optical lens according to Embodiment 2 of the present application;

[0040] Figure 3 is a schematic structural diagram of an optical lens according to Example 3 of the present application;

[0041] Figure 4 is a schematic structural diagram of an optical lens according to Example 4 of the present application;

[0042] Figure 5 is a schematic structural diagram of an optical lens according to Example 5 of the present application;

[0043] Figure 6 is a schematic structural diagram of an optical lens according to Example 6 of the present application;

[0044] Figure 7 is a schematic structural diagram of an optical lens according to Example 7 of the present application;

[0045] Figure 8 is a schematic structural diagram of an optical lens according to Example 8 of the present application;

[0046] Fig. 9is a schematic structural diagram of an optical lens according to Example 9 of the present application;

[0047] Fig.10 is a schematic structural diagram of an optical lens according to Embodiment 10 of the present application;

[0048] Fig.11 is a schematic structural diagram of an optical lens according to Example 11 of the present application;

[0049] Fig.12 Schematic diagram of the structure of an optical lens according to Example 12 of the present application. DETAILED DESCRIPTION

[0050] In order to facilitate the understanding of the present application, the present application will be described more comprehensively below with reference to the relevant drawings. It should be understood that these detailed descriptions are only descriptions of exemplary embodiments of the present application, and do not limit the scope of the present application in any way. Throughout the specification, the same figure numbers refer to the same elements. The expression "and / or" includes any and all combinations of one or more of the associated listed items.

[0051] It should be noted that in this specification, the expressions of first, second, third, etc. are only used to distinguish one feature from another feature, and do not represent any limitation on the features. Therefore, without departing from the teaching of the present application, the first lens discussed below may also be referred to as the second lens or the third lens.

[0052] In the drawings, the thickness, size and shape of the lenses have been slightly exaggerated for ease of explanation. Specifically, the shapes of the spherical or aspherical surfaces shown in the drawings are shown by way of example. That is, the shapes of the spherical or aspherical surfaces are not limited to the shapes of the spherical or aspherical surfaces shown in the drawings. The drawings are only examples and are not drawn strictly to scale.

[0053] In this article, 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, the surface of each lens closest to the second side is called the second side surface of the lens, and the surface of the optical lens closest to the second side is called the second side surface of the optical lens.

[0054] It should be understood that the optical lens provided in the present application can be used for both video recording and projection. When the optical lens provided in the present application is used for a video recording lens, the "first side" referred to in this article may refer to the object side, and the "second side" may refer to the image side; when the optical lens provided in the present application is used for a projection lens or a radar transmitting lens, the "first side" referred to in this article may refer to the imaging side, and the "second side" may refer to the image source side.

[0055] It should also be understood that the terms "comprises", "including", "having", "includes" and / or "comprising", when used in this specification, indicate 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 expressions such as "at least one of..." appear after a list of listed features, they modify the entire listed features rather than modifying the individual elements in the list. In addition, when describing embodiments of the present application, "may" is used to mean "one or more embodiments of the present application". And, the term "exemplary" is intended to refer to an example or illustration.

[0056] Unless otherwise defined, all terms (including technical terms and scientific terms) used in this article have the same meaning as commonly understood by ordinary technicians in the field to which this application belongs. It should also be understood that terms (such as terms defined in commonly used dictionaries) should be interpreted as having a meaning consistent with their meaning in the context of the relevant technology, and will not be interpreted in an idealized or overly formal sense unless explicitly defined in this article.

[0057] It should be noted that, in the absence of conflict, the embodiments and features in the embodiments of the present application can be combined with each other. The present application will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0058] The features, principles and other aspects of the present application are described in detail below.

[0059] In example embodiments, the optical lens may include a first lens group, a stop, and a second lens group arranged in sequence from a first side to a second side along an optical axis.

[0060] In an exemplary embodiment, the optical lens may include, for example, five lenses having optical power, namely, a first lens, a second lens, a third lens, a fourth lens, and a fifth lens, which are arranged in sequence from the first side to the second side along the optical axis.

[0061] In an exemplary embodiment, the first lens group may include a first lens and a second lens. The combined focal length value of the first lens group is positive. The first lens may have a negative optical power. The second lens may have a positive optical power. By defining the first lens as negative and the second lens as positive, the total length of the optical system of the optical lens can be shortened and the front port diameter can be reduced. The first lens group may also be referred to as a front lens group.

[0062] In an exemplary embodiment, the second lens group may include a third lens, a fourth lens, and a fifth lens. The second lens group may also be referred to as a rear lens group.

[0063] In an exemplary embodiment, the optical lens provided by the present application can be used as, for example, a vehicle-mounted lens, in which case the first side of the optical lens can be the object side, and the second side can be the image side. Light from the object side can be imaged on the image side. The second side of the optical lens is the imaging surface of the optical lens.

[0064] In an exemplary embodiment, the optical lens provided by the present application can be used as, for example, a projection lens or a laser radar transmitting end lens. In this case, the second side of the optical lens can be an image source side, and the first side can be an imaging side. Light from the image source side can be imaged on the imaging side. The second side surface of the optical lens is the image source surface of the optical lens.

[0065] In an exemplary embodiment, the optical lens may further include a photosensitive element disposed on the second side surface. Optionally, the photosensitive element disposed on the second side surface may be a charge coupled device (CCD) or a complementary metal oxide semiconductor (CMOS).

[0066] In an exemplary embodiment, the first lens may have a negative optical power, and its first side surface is a concave surface and the second side surface is a convex surface. The first lens has a negative optical power and plays a role in diverging light. Under the same field of view angle, the light emitted through the second side surface of the first lens can make the subsequent optical system have a larger light receiving surface and reduce the front port diameter. The first side surface of the first lens is a concave surface, which plays a role in diverging light. The light emitted through the first side surface of the first lens can make the subsequent optical system have a larger light receiving surface. The second side surface of the first lens is a convex surface, which plays a role in converging light, which is conducive to controlling the diameter of the rear lens and realizing a miniaturized design.

[0067] In an exemplary embodiment, the first lens may have a negative optical power, and its first side surface is a convex surface and the second side surface is a concave surface. The first lens has a negative optical power and plays a role in diverging light. Under the same field of view, the light emitted by the first lens can make the subsequent optical system have a larger light receiving surface, which is conducive to reducing the front port diameter. The first side surface of the first lens is a convex surface, which is conducive to converging light, collecting more light into the rear optical system, increasing the amount of light entering the lens, and increasing the amount of light passing through. The second side surface of the first lens is a concave surface, which can diverge the large-angle light passing through the first lens, which is conducive to the rear optical system to correct the aberration of large-angle light and achieve high resolution.

[0068] In an exemplary embodiment, the second lens may have positive focal power, and its first side surface is convex and its second side surface is concave. The second lens has positive focal power, which plays a role in further converging light. When used with the first lens having negative focal power, it converges the light emitted by the first lens, which is beneficial to reducing the total length of the system, and the convergence of light can further reduce the diameter of the rear port. The first side surface of the second lens is convex, which receives the light diverged by the first lens, converges the divergent light quickly, avoids the divergent light from exiting the lens, and reduces the energy loss of light. The second side surface of the second lens is concave, so that the divergent light can smoothly enter the rear after converging, further making the light trend smoothly transition, which can reduce the loss of light energy and is beneficial to improving the illumination of the peripheral field of view.

[0069] In an exemplary embodiment, the second lens may have positive focal power, and its first side surface is convex, and its second side surface is convex. The second lens has positive focal power, which is conducive to reducing the total length of the system and further reducing the diameter of the rear port. The shape of the second lens is set to be biconvex, which can receive the light diverging from the first lens and allow it to enter the rear smoothly; by appropriately converging the front light, the light transition is smooth, the light energy loss is reduced, and it is conducive to preliminary aberration correction of the incident light, which is conducive to achieving high resolution and improving the resolution ability of the optical lens.

[0070] In an exemplary embodiment, the third lens may have a negative optical power, and its first side surface is a concave surface and the second side surface is a convex surface. The third lens has a negative optical power and has a divergent effect on light. It receives the light passing through the second lens, so that the edge field of view light beam reaches the fourth lens with a higher height and a wider width, which is beneficial to increase the cone angle of the edge field of view light beam when it reaches the image plane and reduce the incident angle of the main light, improve the relative illumination of the edge field of view, and improve the aberration and resolution. The first side surface of the third lens is concave, which can smoothly receive and further diverge the light, so that the light emitted by the second lens can smoothly enter the rear optical system, reduce the generation of aberrations, and improve the imaging quality. The second side surface of the third lens is a convex surface, so that the edge field of view light is deflected toward the optical axis after passing through the second side surface of the third lens, which is beneficial to reduce the diameter of the rear port of the system. The shape of the third lens is a meniscus shape. With the change of temperature, the difference between the changes of the two surfaces is small, which is beneficial to achieve better thermal stability performance at high temperatures.

[0071] In an exemplary embodiment, the third lens may have negative optical power, and its first side surface is concave, and its second side surface is concave. The third lens has negative optical power and has a divergent effect on light, which is beneficial to improve the relative illumination of the edge field of view, improve aberrations, and improve resolution. The shape of the third lens is set to be double concave, and the light tends to diverge after passing through the third lens. The edge light and the central light of each field of view are clearly distinguished, which is beneficial to the aberration correction of the center and edge light of each field of view, and achieves high resolution; in addition, at the same image height, a lower height of the emitted light can be achieved, which is beneficial to reduce the aperture of the lens and adjust the CRA (Chief Ray Angle) to adapt to different types of chips.

[0072] In an exemplary embodiment, the third lens may have positive focal power, and its first side surface is convex and its second side surface is concave. The third lens has positive focal power and can effectively receive the converging light beam of the second lens, reduce the height of the light beam when it is incident on the first side surface of the fourth lens, and reduce the first side aperture of the fourth lens. The first side surface of the third lens is convex, which is beneficial to reduce the angle between the edge incident light and the normal line of the first side surface, avoid light divergence, reduce sensitivity, and is also beneficial to correct aperture aberrations, further improving the resolution quality. The second side surface of the third lens is concave, which can receive and diverge the front light, so that the edge field of view light beam is higher and wider when it reaches the fourth lens, thereby improving the relative illumination of the edge field of view. The shape of the third lens is a meniscus shape, and the difference in changes between the two surfaces is small as the temperature changes, which is beneficial to achieve better thermal stability performance at high temperatures.

[0073] In an exemplary embodiment, the fourth lens may have positive focal power, and its first side surface is concave and the second side surface is convex. The fourth lens has positive focal power and has a converging effect on light. When used with the fifth lens, it can effectively correct the aberration of the system, improve image quality, and optimize optical properties such as distortion and CRA. The first side surface of the fourth lens is concave, which can receive the light from the third lens and continue to diverge after passing through the first side surface of the fourth lens, so that the rear end light converges more slowly, and the light in the edge field of view shows an upward trend, which is conducive to matching with a large chip. The second side surface of the fourth lens is convex, which converges the light smoothly, can shorten the distance to the image plane, and is conducive to reducing the total length of the optical lens.

[0074] In an exemplary embodiment, the fourth lens may have positive power, and its first side surface is convex, and its second side surface is convex. The fourth lens has positive power and has a converging effect on light. When used with the fifth lens, it can effectively correct the aberration of the system, improve image quality, and optimize optical properties such as distortion and CRA. The shape of the fourth lens is biconvex, which can compress the light so that it can be smoothly incident on the fifth lens, reduce the sensitivity of the system, and make the light turn faster to reach the image plane, thereby reducing the total length of the optical lens.

[0075] In an exemplary embodiment, the fourth lens may have negative power, and its first side surface is concave and its second side surface is convex. The fourth lens has negative power and diverges the central light, which can balance the optical path of the central and peripheral light, reduce aberrations, and improve resolution.

[0076] In an exemplary embodiment, the fifth lens may have positive focal power, with a first side surface being convex and a second side surface being concave. The fifth lens has positive focal power and receives the front light, which is beneficial to improving the resolution. Furthermore, the fifth lens receives the light compressed by the front positive lens, reduces the angle of the light, meets the requirements of CRA, and can use the aspheric surface to correct the lens aberration. The first side surface of the fifth lens is convex, which is matched with the second side surface of the fourth lens, which is also convex, to make the light transition smoothly and reduce the sensitivity. The second side surface of the fifth lens is concave, which diverges the central light so that the light can reach a higher imaging position. At the same time, it is combined with the reverse bending of the peripheral light to converge, so that the incident angle of the light entering the chip is reduced, which helps to improve the illumination and reduce the chromatic aberration.

[0077] In an exemplary embodiment, the fifth lens may have a negative optical power, and its first side surface is a convex surface and the second side surface is a concave surface. The fifth lens has a negative optical power and has a divergent effect on the light, so that the subsequent optical system has a larger light receiving surface. Improving the optical performance can effectively correct various aberrations caused by the front lens and improve the image quality. The first side surface of the fifth lens is a convex surface, which is matched with the second side surface of the fourth lens, which is also a convex surface, so that the light can transition smoothly and reduce sensitivity. The second side surface of the fifth lens is a concave surface, which diverges the central light so that the light can reach a higher imaging position. At the same time, combined with the reverse bending of the peripheral light, the peripheral light is converged, so that the incident angle of the light entering the chip is reduced, which helps to improve the illumination and reduce chromatic aberration.

[0078] In an exemplary embodiment, the fifth lens may have negative optical power, and its first side surface is concave, and its second side surface is concave. The fifth lens has negative optical power and has a divergent effect on light, so that the subsequent optical system has a larger light receiving surface. Improving optical performance can effectively correct various aberrations caused by the front lens and improve image quality. The first side surface of the fifth lens is a concave surface, which can receive the light from the fourth lens and continue to diverge after passing through the first side surface of the fifth lens, so that the rear end light converges more slowly, and the light in the edge field of view shows an upward trend. It is matched with the first two lenses and is conducive to matching with large chips. The shape of the fifth lens is double concave, which is conducive to the proper divergence of light and a smooth transition to the image plane, so that the angle of light to the image plane meets the CRA requirements, and improves resolution and illumination, shortens the distance between the fifth lens and the imaging plane, and realizes a miniaturized design.

[0079] In an exemplary embodiment, the optical lens according to the present application may satisfy: TTL / F≤3, wherein F is the focal length value of the entire set of the optical lens, and TTL is the total optical length of the optical lens, that is, the distance from the center of the first side surface of the first lens to the imaging surface of the optical lens on the optical axis. Satisfying TTL / F≤3 and controlling the ratio of the total optical length to the focal length of the lens to be smaller can effectively limit the length of the lens, which is conducive to miniaturization of the lens. More specifically, TTL and F can further satisfy: TTL / F≤2.5. Controlling the lens parameters so that the ratio of the total optical length to the focal length of the lens is smaller can more effectively limit the length of the lens and further miniaturize the lens.

[0080] In an exemplary embodiment, the optical lens according to the present application may satisfy: -6≤F1 / F<0, wherein F1 is the focal length value of the first lens, and F is the focal length value of the entire group of the optical lens. More specifically, F1 and F may further satisfy: -5.5≤F1 / F≤-0.5. Controlling the focal length value of the first lens to be negative and small in value is conducive to rapid divergence of light and to achieving a large image surface; at the same time, the divergence of light enables the distance between the first lens and the second lens to be shortened when the lens aperture is determined, which is conducive to achieving a short TTL; when the receiving surface is the same, the first lens is negative, which is more conducive to achieving a small front aperture. Setting the lower limit of F1 / F is conducive to achieving a small aperture and miniaturization of the optical lens, avoiding the focal length value of the first lens being too long relative to the focal length of the entire optical system, the optical focal length of the first lens being too weak to fully bend the light, and the aperture of the first lens failing to meet the requirements of a small aperture. Setting the F1 / F upper limit can prevent the focal length of the entire optical lens from becoming too weak, which is conducive to further miniaturization of the optical lens. By controlling the focal length range of the first lens, the focal length value data of the first lens can be prevented from being too small, thereby achieving a small aperture and facilitating the smooth passage of light, thereby achieving high resolution.

[0081] In an exemplary embodiment, the optical lens according to the present application may satisfy: F2 / F≤2, wherein F2 is the focal length value of the second lens, and F is the focal length value of the entire group of the optical lens. More specifically, F2 and F may further satisfy: F2 / F≤1.5. More specifically, F2 and F may further satisfy: 0.4≤F2 / F≤1.2. Satisfying F2 / F≤2, the focal length of the second lens is positive and has a small value, which is conducive to rapid convergence of light, avoiding further divergence of light emitted by the first lens, and is conducive to reducing the front port diameter and achieving short TTL for the optical lens. Further satisfying F2 / F≤1.5 is conducive to further achieving short TTL and reducing the front port diameter. Further satisfying 0.4≤F2 / F≤1.2 is conducive to taking into account both high resolution and miniaturization.

[0082] In an exemplary embodiment, the optical lens according to the present application may satisfy: |F3| / F2≥1.5, wherein F3 is the focal length value of the third lens, and F2 is the focal length value of the second lens. More specifically, F3 and F2 may further satisfy: |F3| / F2≥2. When |F3| / F2≥1.5 is satisfied, the focal length of the second lens is positive and has a small value, and the light quickly converges through the second lens. At the same time, the focal length of the third lens has a large value. After the light quickly converges through the second lens, the third lens can receive the light and has a small ability to deflect the light, which is beneficial for the smooth transition of the light to the rear optical system, reduces aberrations, improves resolution, and is beneficial for achieving short TTL. Furthermore, F3 and F2 may satisfy: -10≤F3 / F2≤-1.5. The F3 / F2 ratio range is controlled within the conditional formula -10≤F3 / F2≤-1.5. The focal length of the third lens is negative, the focal length of the second lens is positive and has a small value, and the light quickly converges through the second lens, which is beneficial to a small front aperture; the focal length of the third lens is negative and has a large value, which receives the light from the front lens and further diverges the light, which is beneficial to achieving a large image surface and miniaturization; in addition, the third lens is negative and can diverge the light at the edge of the field of view, which is beneficial to achieving small distortion and high resolution.

[0083] In an exemplary embodiment, the optical lens according to the present application may satisfy: d12 / TTL≤0.05, wherein d12 is the distance from the second side of the first lens to the first side of the second lens on the optical axis, and TTL is the distance from the center of the first side of the first lens to the imaging surface of the optical lens on the optical axis. Satisfying d12 / TTL≤0.05, the distance between the first lens and the second lens is controlled, so that the spacing between the first lens and the second lens is small, and the focal lengths of the first lens and the second lens are matched, which is conducive to achieving short TTL; the spacing between the first lens and the second lens is small, and when matched with the first lens with a negative focal length, it is conducive to the second lens to receive the light diverging from the first lens, reduce the aperture of the second lens, and facilitate the realization of a small front aperture. Further d12 / TTL≤0.02 is more conducive to miniaturization. Furthermore, d12 and TTL may satisfy: d12 / TTL≤0.015, which is conducive to miniaturization and high resolution.

[0084] In an exemplary embodiment, the optical lens according to the present application may satisfy: d45 / TTL≤0.02, wherein d45 is the distance from the second side surface of the fourth lens to the first side surface of the fifth lens on the optical axis, and TTL is the distance from the center of the first side surface of the first lens to the imaging surface of the optical lens on the optical axis. Satisfying d45 / TTL≤0.02 is conducive to achieving a shorter TTL by compressing the distance between the fourth lens and the fifth lens. Furthermore, d45 and TTL may satisfy: d45 / TTL≤0.015, which is more conducive to achieving a short TTL.

[0085] In an exemplary embodiment, the optical lens according to the present application may satisfy: -6≤F5 / F<0, wherein F5 is the focal length value of the fifth lens, and F is the focal length value of the entire group of optical lenses. Satisfying -6≤F5 / F<0, the focal length of the fifth lens is controlled to be negative and have a small value, which is beneficial to the divergence of light and the realization of a larger image plane; and, under the same image plane condition, it is beneficial to shorten the distance from the fifth lens to the imaging plane, which is beneficial to the realization of short TTL. Furthermore, F5 and F may satisfy: -5≤F5 / F≤-0.1, and the focal length of the fifth lens is controlled to be negative and the focal length value can achieve a large image plane and a short TTL.

[0086] In an exemplary embodiment, the optical lens according to the present application may satisfy: F5 / F≥10, where F5 is the focal length of the fifth lens and F is the focal length of the entire optical lens group. When F5 / F≥10 is satisfied, the fifth lens is positive and has a large value, which is conducive to the smooth transition of light to the image plane, reducing aberrations, and improving resolution; at the same time, the focal length of the fifth lens is large, which is conducive to reducing the impact of temperature changes on the focal length of the lens, and is conducive to thermal stability of the optical lens. Furthermore, F5 and F may satisfy: F5 / F≥12, which is more conducive to the smooth transition of light to the image plane, reducing aberrations, improving resolution, and achieving thermal stability of the lens.

[0087] In an exemplary embodiment, the optical lens according to the present application may satisfy: R52 / F≤12, wherein R52 is the radius of curvature of the second side of the fifth lens, and F is the focal length value of the entire group of the optical lens. Furthermore, R52 and F may satisfy: R52 / F≤10 or 0.1≤R52 / F≤9. When R52 / F≤12 is satisfied, the second side of the fifth lens is a concave surface, and the value is relatively small, which is conducive to the rapid divergence of light and the realization of a larger image surface. Furthermore, setting a lower limit of R52 / F limits the light divergence ability of the second side of the fifth lens to not be too large, which is conducive to improving the resolution of the lens; on the other hand, requiring the focal length of the entire group of the optical lens to be relatively small is conducive to further miniaturization of the optical system.

[0088] In an exemplary embodiment, the optical lens according to the present application may satisfy: H / D52 ≥ 0.75, where H is the image height corresponding to the maximum field angle of the optical lens, and D52 is the maximum aperture of the second side of the fifth lens. Satisfying H / D52 ≥ 0.75 is conducive to the optical lens to achieve a large image height. Furthermore, H and D52 may satisfy: 0.9 ≤ H / D52 ≤ 1.5, which is more conducive to the optical lens to achieve a large image height and high resolution.

[0089] In an exemplary embodiment, the optical lens according to the present application may satisfy: 0.1≤R11 / R12≤5, wherein R11 is the radius of curvature of the first side of the first lens, and R12 is the radius of curvature of the second side of the first lens. Satisfying 0.1≤R11 / R12≤5, the first side of the first lens is in the same direction as the second side, and the concave surface is conducive to the divergence of light and reduces the small aperture at the front end; the convex surface converges the light, reduces the total length of the optical lens, and controls the ratio range of R11 to R12, which is conducive to the smooth transition of light to the rear optical system, collects more light into the lens, and achieves small aperture and short TTL while improving resolution. Furthermore, R11 and R12 may satisfy: 0.15≤R11 / R12≤4, which is more conducive to the optical lens to achieve small aperture and short TTL while improving resolution.

[0090] In an exemplary embodiment, the optical lens according to the present application may satisfy: TTL / H≤3, wherein TTL is the distance from the center of the first side surface of the first lens to the imaging surface of the optical lens on the optical axis, and H is the image height corresponding to the maximum field angle of the optical lens. Satisfying TTL / H≤3 satisfies the conditional expression, which is conducive to the optical lens to achieve short TTL and large image height. Furthermore, TTL and H may satisfy: 0.5≤TTL / H≤2, which is conducive to further achieving short TTL and large image height.

[0091] In an exemplary embodiment, the optical lens according to the present application may satisfy: |F1 / R21|≥3, wherein F1 is the focal length of the first lens, and R21 is the radius of curvature of the first side of the second lens. Furthermore, F and R21 may satisfy: |F1 / R21|≥4; or 4.5≤|F1 / R21|≤12. To satisfy |F1 / R21|≥3, the first lens is matched with the second lens, and the first side of the second lens is convex and has a small radius of curvature, which is conducive to the rapid convergence of the divergent light emitted by the first lens, and realizes short TTL and small aperture. Setting an upper limit of |F1 / R21| to avoid F1 being too large or R21 being too small is conducive to the smooth transition of light from the first lens to the second lens, which is conducive to reducing aberrations and improving resolution.

[0092] In an exemplary embodiment, the optical lens according to the present application may satisfy: |R21 / R22|≤0.3, wherein R21 is the radius of curvature of the first side of the second lens, and R22 is the radius of curvature of the second side of the second lens. Furthermore, R21 and R22 may satisfy: |R21 / R22|≤0.2. By controlling the numerical range of |R21 / R22|, combined with the fact that the first side of the second lens is convex and has a small numerical value, it is possible to quickly converge light and achieve short TTL of the system. The second side lens has a large radius, which can smoothly transition the light emitted from the first side, reduce aberrations, and improve resolution. The first side and the second side of the second lens are matched to achieve short TTL and high resolution.

[0093] In an exemplary embodiment, the optical lens according to the present application may satisfy: D / H / FOV×180≤3.6, where D is the maximum aperture of the first side of the first lens, FOV is the maximum field of view of the optical lens, and H is the image height corresponding to the maximum field of view of the optical lens. Furthermore, D, H and FOV may satisfy: D / H / FOV×180≤2.7. When the maximum field of view image height H of the lens and the field of view angle FOV corresponding to the maximum field of view image height remain unchanged, the front port diameter is small, and miniaturization can be achieved.

[0094] In an exemplary embodiment, the optical lens according to the present application can meet the following conditions: |F3 / F|≥1.8, where F3 is the focal length of the third lens and F is the focal length of the entire optical lens group. When |F3 / F|≥1.8 is met, the focal length of the third lens is relatively large, which can reduce the effect of temperature changes on the focal length of the lens, and is beneficial to the thermal stability of the optical system; at the same time, it is beneficial to the smooth transition of light, avoid excessive convergence of light, reduce distortion, and improve resolution. Further, the third lens is negative and the focal length of the third lens is relatively large, which can reduce the effect of temperature changes on the focal length of the lens, and is beneficial to the thermal stability of the optical lens. The third lens receives the front converged light and further diverges the light to the rear optical system. When the image plane of the optical system is the same, the third lens is negative, which is more conducive to miniaturization and small front-end aperture; the focal length of the third lens is negative, which diverges the light converged by the second lens, so that the edge field of view light beam reaches a higher height, which is beneficial to the realization of a large image plane, reduces edge field of view distortion, and is beneficial to the smooth transition of light and improves resolution. Furthermore, F3 and F can satisfy: |F3 / F|≥2; or F3 / F≤-1.8; or -10≤F3 / F≤-2; or -10≤F3 / F≤-2. Setting the lower limit of |F3 / F| can prevent F3 from being too large or F from being too small, which is further beneficial to improving resolution and reducing TTL.

[0095] In an exemplary embodiment, the optical lens according to the present application satisfies: |Sag31-Sag32| / d31≤0.44, wherein Sag31 is the vector height value corresponding to the maximum clear aperture of the first side surface of the third lens, Sag32 is the vector height value corresponding to the maximum clear aperture of the second side surface of the third lens, and d31 is the center thickness of the third lens on the optical axis. Satisfying |Sag31-Sag32| / d31≤0.44 is conducive to uniform thermal expansion and contraction of the entire third lens and good thermal performance; and is conducive to a relatively flat overall shape of the third lens, a small overall torque when subjected to radial force, and stable performance. Furthermore, Sag31, Sag32 and d31 may satisfy: |Sag31-Sag32| / d31≤0.38, which is conducive to further improving the overall shape and stable thermal performance of the third lens.

[0096] In an exemplary embodiment, the optical lens according to the present application may satisfy: |arctan(Sag21 / (D21 / 2))| / |arctan(Sag22 / (D22 / 2))|≥3, wherein Sag21 is the sag value corresponding to the maximum clear aperture of the first side surface of the second lens, Sag22 is the sag value corresponding to the maximum clear aperture of the second side surface of the second lens, D21 is the maximum clear aperture of the first side surface of the second lens, and D22 is the maximum clear aperture of the second side surface of the second lens. Furthermore, Sag21, Sag22, D21, and D22 may satisfy: 5≤|arctan(Sag21 / (D21 / 2))| / |arctan(Sag22 / (D22 / 2))|≤30. Satisfying |arctan(Sag21 / (D21 / 2))| / |arctan(Sag22 / (D22 / 2))|≥3, the first side surface of the second lens is convex and the lens angle is large, which can quickly converge light and realize short TTL of the optical lens. The second side surface has a small angle, and the image plane is conducive to smooth transition of light, reducing aberrations and improving resolution. The combination of the first side surface and the second side surface of the second lens is conducive to the lens achieving short TTL and high resolution.

[0097] In an exemplary embodiment, the optical lens according to the present application may satisfy: 0.4≤F / H≤2, where F is the focal length value of the entire optical lens set, and H is the image height corresponding to the maximum field angle of the optical lens. Furthermore, F and H may satisfy: 0.5≤F / H≤1.5. Satisfying 0.4≤F / H≤2 or 0.5≤F / H≤1.5 makes the focal length of the optical lens close to the image height, which is conducive to reducing distortion and improving resolution.

[0098] In an exemplary embodiment, the optical lens according to the present application may satisfy: 0.5≤(H / 2) / (F×tan(θ / 2))≤2, wherein H is the image height corresponding to the maximum field angle of the optical lens, F is the focal length value of the entire group of the optical lens, and θ is the radian value corresponding to the maximum field angle of the optical lens. Furthermore, H, F, and θ may satisfy: 0.7≤(H / 2) / (F×tan(θ / 2))≤1.5. Satisfying 0.5≤(H / 2) / (F×tan(θ / 2))≤2 or 0.7≤(H / 2) / (F×tan(θ / 2))≤1.5 makes the focal length of the optical lens close to the image height, which is beneficial to reducing the distortion of the optical system and improving the resolution.

[0099] In an exemplary embodiment, the optical lens according to the present application may satisfy: F / ENPD≤2.2, where F is the focal length value of the entire optical lens group, and ENPD is the entrance pupil diameter of the optical lens. Furthermore, F and ENPD may satisfy: F / ENPD≤2.1. When F / ENPD≤2.2 or F / ENPD≤2.1 is satisfied, the entrance pupil diameter of the optical lens is larger, ensuring a larger amount of light, which is conducive to achieving a small FNO and improving relative illumination.

[0100] In an exemplary embodiment, the optical lens according to the present application may satisfy: F12 / F≤3, wherein F12 is the combined focal length value of the first lens and the second lens, and F is the focal length value of the entire group of the optical lens. Satisfying F12 / F≤3, the combined focal length value of the front group of lenses is positive, and the first lens is negative, and the second lens is positive, which is conducive to shortening the total length of the optical system and reducing the front end diameter. Furthermore, F12 and F may satisfy: F12 / F≤2; or 0.3≤F12 / F≤1.5. Setting an upper limit of F12 / F can avoid the combined focal length of the first lens and the second lens being too large, and the ability to deflect light is small, which is conducive to achieving a small front end diameter. Furthermore, setting a lower limit of F12 / F can avoid the entire group of focal length values ​​of the optical lens being too large, or the combined focal length of the first lens and the second lens being too small, which is conducive to shortening the total length of the optical system.

[0101] In an exemplary embodiment, the optical lens according to the present application may satisfy: F4 / F≤5, wherein F4 is the focal length value of the fourth lens, and F is the focal length value of the entire group of optical lenses. Satisfying F4 / F≤5 and appropriately setting the ratio between the focal length value of the fourth lens and the focal length value of the entire group of optical lenses is conducive to shortening the total length of the optical system, making the entire system smaller, and at the same time, improving the system resolution. Setting an upper limit for F4 / F can avoid the focal length of the fourth lens being too large, reducing the fourth lens's ability to process light, and facilitating the realization of short TTL. Furthermore, F4 and F may satisfy: F4 / F≤3; or 0.1≤F4 / F≤2. Further controlling the fourth lens to be positive and the ratio between the focal length value of the fourth lens and the focal length value of the entire group of optical lenses can better achieve short TTL and high resolution.

[0102] In an exemplary embodiment, the optical lens according to the present application may satisfy: -1≤F4 / F3, wherein F4 is the focal length value of the fourth lens, and F3 is the focal length value of the third lens. Satisfying -1≤F4 / F3, controlling the third lens to be negative and the fourth lens to be positive, and by appropriately setting the focal length ratio of the third lens to the fourth lens, a large image surface can be achieved, the total length of the optical system can be shortened, and miniaturization can be achieved. Furthermore, F4 and F3 may satisfy: -0.8≤F4 / F3≤-0.1. Setting the lower limit of F4 / F3 can avoid the focal length of the third lens being too small or the focal length of the fourth lens being too large, which is conducive to the smooth transition of light from the third lens to the fourth lens, reducing aberrations and achieving short TTL. Setting the upper limit of F4 / F3 can avoid the focal length of the third lens being too large or the focal length of the fourth lens being too small, which is conducive to enhancing the third lens's ability to deflect light and achieve a large image surface; at the same time, it is conducive to controlling the fourth lens's ability to deflect light, so that the light smoothly transitions to the rear end, which is conducive to achieving the requirements of a large image surface.

[0103] In an exemplary embodiment, the optical lens according to the present application may satisfy: BFL / TTL≥0.1, wherein BFL is the distance from the center of the second side surface of the fifth lens to the imaging surface of the optical lens on the optical axis, and TTL is the distance from the center of the first side surface of the first lens to the imaging surface of the optical lens on the optical axis. By satisfying BFL / TTL≥0.1 and controlling BFL / TTL within a certain range, the long-distance back focus and miniaturization of the optical lens can be achieved. Furthermore, satisfying 0.15≤BFL / TTL≤4 is more conducive to achieving long back focus, miniaturization and high resolution.

[0104] In an exemplary embodiment, the optical lens according to the present application may satisfy: (d31+d41+d51) / TTL≤0.5, wherein d31 is the center thickness of the third lens on the optical axis, d41 is the center thickness of the fourth lens on the optical axis, d51 is the center thickness of the fifth lens on the optical axis, and TTL is the distance from the center of the first side surface of the first lens to the imaging surface of the optical lens on the optical axis. Satisfying (d31+d41+d51) / TTL≤0.5 is conducive to achieving a smaller thickness of the rear end lens, that is, the third lens, the fourth lens, and the fifth lens, and achieving miniaturization. Further, 0.15≤(d31+d41+d51) / TTL≤0.43 may be satisfied, which is conducive to balancing high resolution and miniaturization.

[0105] In an exemplary embodiment, the optical lens according to the present application may satisfy: d23 / F2≥0.15, wherein d23 is the distance from the second side of the second lens to the first side of the third lens on the optical axis, and F2 is the focal length of the second lens. Satisfying d23 / F2≥0.15 is conducive to achieving a smaller focal length of the second lens, which can quickly converge light and achieve miniaturization. With a larger distance between the second lens and the third lens, it is conducive to reducing the aperture of the third lens, which is conducive to a smooth transition of light and achieving a small aperture at the front end while taking into account a large image surface. Further satisfying 0.17≤d23 / F2≤0.4 is more conducive to achieving high resolution while taking into account miniaturization.

[0106] In an exemplary embodiment, the optical lens according to the present application may satisfy: 35°≤(FOV×F) / H≤70°, where FOV is the maximum field of view angle of the optical lens, F is the focal length value of the entire set of the optical lens, and H is the image height corresponding to the maximum field of view angle of the optical lens. Satisfying 35°≤(FOV×F) / H≤70° is conducive to meeting the field of view requirements of the vehicle-mounted interior optical lens and achieving a large image height. Further satisfying 37°≤(FOV×F) / H≤66° is conducive to meeting the field of view requirements of the vehicle-mounted interior optical lens, while being more conducive to achieving small distortion and improving resolution.

[0107] In an exemplary embodiment, the optical lens according to the present application may satisfy: TTL / H / FOV×180≤5.5, wherein TTL is the distance from the center of the first side surface of the first lens to the imaging surface of the optical lens on the optical axis, H is the image height corresponding to the maximum field of view of the optical lens, and FOV is the maximum field of view of the optical lens. Satisfying TTL / H / FOV×180≤5.5 can achieve both large image height and miniaturization. Further satisfying 2.5≤TTL / H / FOV×180≤5 is more conducive to achieving high resolution.

[0108] In an exemplary embodiment, the optical lens according to the present application may satisfy: 0.75≤(1 / F1+1 / F2) / (1 / F), wherein F is the focal length value of the entire optical lens group, F1 is the focal length value of the first lens, and F2 is the focal length value of the second lens. Satisfying 0.75≤(1 / F1+1 / F2) / (1 / F), the first lens has a negative focal length, the second lens has a positive focal length, and the control condition range is conducive to achieving a smaller focal length of the first lens and the second lens. The first lens is negative, which is conducive to rapid divergence of light, a large image surface, and shortening the distance between the first lens and the second lens, which is conducive to miniaturization. The focal length of the second lens is positive and has a small value, which receives the light diverged by the first lens and converges it quickly, which is conducive to reducing the front port diameter and miniaturization of the lens. The first lens and the second lens are matched in optical power to achieve a small diameter and short TTL. Further satisfying 0.8≤(1 / F1+1 / F2) / (1 / F)≤2, the combined focal length of the first lens and the second lens is positive, and the combined focal length is relatively small, which is beneficial to shortening the total length of the optical system and reducing the front port diameter, and is more conducive to achieving a small aperture and short TTL.

[0109] In an exemplary embodiment, the optical lens according to the present application may satisfy: FOV / H≤15, where FOV is the maximum field of view of the optical lens, and H is the image height corresponding to the maximum field of view of the optical lens. Satisfying FOV / H≤15 is conducive to achieving a large image height, and is more conducive to meeting the requirements of the application of the vehicle-mounted interior optical lens of the present application. Further satisfying FOV / H≤12 is more conducive to achieving a large image height.

[0110] In an exemplary embodiment, the optical lens according to the present application can meet the following conditions: 40°≤FOV≤100°, where FOV is the maximum field of view of the optical lens. If 40°≤FOV≤100° is met, the optical lens of the present application is applied to vehicles. If 50°≤FOV≤80° is further met, it is more conducive to meeting the field of view requirements of vehicle-mounted side view, electronic rearview mirror, rear view, surround view, interior view, and front view. Specifically, the present application can be applied to vehicle-mounted interior view video calls.

[0111] In an exemplary embodiment, under the premise that the front diameter of the optical lens and the distance TTL from the center of the first side surface of the first lens to the imaging surface of the optical lens on the optical axis are small, at least one of the optical surfaces of the first lens to the fifth lens has a recurve. The setting of the recurve is conducive to achieving high light transmission while taking into account high resolution and large image height, further making the light trend transition smoothly, improving the astigmatism and field curvature of the imaging, and improving the resolution ability of the optical system; at the same time, it is conducive to achieving a better correction of the aberration of the light emitted from different fields of view under the premise of maintaining the overall shape of the lens.

[0112] In an exemplary embodiment, at least one surface of the fifth lens may have an inflection point, which is conducive to achieving high light transmittance while taking into account high resolution and large image height, further making the light transition smooth, improving the astigmatism and field curvature of the imaging, and improving the resolving power of the optical lens; at the same time, it is also conducive to achieving better correction of the aberration of light emitted from different fields of view while maintaining the overall shape of the lens.

[0113] In an exemplary embodiment, an aperture may be provided between the first lens group and the second lens group. For example, the aperture may be provided between the second lens and the third lens, which is beneficial for effectively converging the light entering the optical lens, reducing the lens aperture at the rear end of the optical system, and reducing the assembly sensitivity of the system. However, it should be noted that the position of the aperture disclosed herein is only an example and not a limitation; in alternative embodiments, the aperture may also be provided at other positions according to actual needs.

[0114] In an exemplary embodiment, as needed, the optical lens of the present application may further include a filter and / or a protective glass disposed between the fifth lens and the imaging plane to filter light with different wavelengths to prevent damage to the image-side element (e.g., chip) of the optical lens.

[0115] In an exemplary embodiment, the first lens to the fifth lens may be a spherical lens or an aspherical lens. Exemplarily, at least one of the first lens to the fifth lens is an aspherical lens. The characteristic of an aspherical lens is that the curvature changes continuously from the center of the lens to the periphery. Unlike a spherical lens with a constant curvature from the center of the lens to the periphery, an aspherical lens has a better curvature radius characteristic, and has the advantages of improving distortion aberration and improving astigmatism aberration. After adopting an aspherical lens, the aberration that occurs during imaging can be eliminated as much as possible, thereby improving the imaging quality of the lens. The provision of an aspherical lens helps to correct system aberrations and improve resolution. The present application does not specifically limit the specific number of spherical lenses and aspherical lenses. When focusing on imaging quality, the number of aspherical lenses can be increased, or even all lenses use aspherical lenses.

[0116] In an exemplary embodiment, the third lens, the fourth lens and the fifth lens are aspherical lenses, which are beneficial to achieving high resolution while achieving a small aperture and a large image height in the optical lens; at the same time, it is beneficial to make a smooth transition of the light trend, improve the astigmatism and field curvature of the imaging, and improve the resolving power of the optical system, so that various aberrations of the optical system are fully corrected, which can improve the resolution and optimize the optical performance such as distortion and CRA; the field curvature can also be further reduced to correct the off-axis point aberration of the system.

[0117] In an exemplary embodiment, the first lens to the fifth lens may be a glass lens or a plastic lens. The present application does not specifically limit the specific number of glass lenses and plastic lenses. Specifically, when focusing on resolution quality and reliability, the first lens to the fifth lens may all be glass aspherical lenses. An optical lens made of glass can suppress the deviation of the back focus of the imaging system component with temperature changes to improve the stability of the system. At the same time, the use of glass material can avoid problems such as lens imaging blur caused by high and low temperature changes in the use environment and affecting the normal use of the lens. Of course, the first lens to the fifth lens of the optical lens can also be made of a combination of plastic and glass. Of course, in applications where temperature stability requirements are lower, the first lens to the fifth lens in the optical lens can also be made of plastic. Using plastic to make optical lenses can effectively reduce production costs.

[0118] According to the above-mentioned embodiment of the present application, the optical lens can reasonably set the number of lenses, the shape of each lens, and the focal length, and can meet the requirements of miniaturization, high resolution, large image surface, small aperture, high light flux, etc., by using only five lenses. At the same time, the optical lens also has better temperature performance, the imaging effect of the optical lens changes little in high and low temperature environments, and the image quality is stable, which is conducive to the use of the optical lens in most environments.

[0119] However, those skilled in the art should understand that, without departing from the technical solution claimed in the present application, the number of lenses constituting the lens can be changed to obtain the various results and advantages described in this specification. For example, although five lenses are described as an example in the embodiment, the optical lens is not limited to including five lenses. If necessary, the optical lens may also include other numbers of lenses.

[0120] Specific embodiments of the optical lens applicable to the above-mentioned embodiments are further described below with reference to the accompanying drawings. Example 1

[0121] The following reference Figure 1 An optical lens according to Example 1 of the present application is described. Figure 1 A schematic structural diagram of an optical lens according to Example 1 of the present application is shown.

[0122] like Figure 1 As shown, the optical lens includes a first lens L1, a second lens L2, a third lens L3, a fourth lens L4 and a fifth lens L5 in sequence from the first side to the second side along the optical axis.

[0123] The first lens L1 has negative power, its first side surface S1 is concave, and the second side surface S2 is convex. The second lens L2 has positive power, its first side surface S3 is convex, and the second side surface S4 is concave. The third lens L3 has negative power, its first side surface S6 is concave, and the second side surface S7 is convex. The fourth lens L4 has positive power, its first side surface S8 is concave, and the second side surface S9 is convex. The fifth lens L5 has negative power, its first side surface S10 is convex, and the second side surface S11 is concave.

[0124] In this embodiment, the third lens L3, the fourth lens L4 and the fifth lens L5 are aspherical lenses.

[0125] In this embodiment, the first side surface S10 and the second side surface S11 of the fifth lens L5 are inversely curved.

[0126] In this embodiment, the optical lens further includes a stop STO, and the stop STO may be disposed between the second lens L2 and the third lens L3 to improve imaging quality.

[0127] In this embodiment, the optical lens may further include a filter or a protective glass located between the fifth lens L5 and the imaging plane IMA, and the filter or the protective glass has a first side surface S12 and a second side surface S13.

[0128] The optical lens provided in the present application can be used as, for example, a vehicle-mounted lens. In this case, light from an object passes through each surface S1 to S13 in sequence and is finally imaged on an imaging surface IMA disposed on the second side, wherein an image sensor chip is disposed on the imaging surface IMA.

[0129] It should be understood that the optical lens provided in the present application can also be used as, for example, a projection lens or a laser radar transmitting end lens. In this case, light from the image source surface IMA passes through each surface S13 to S1 in sequence and is finally projected onto a projection surface (not shown) arranged on the first side.

[0130] Table 1 shows the curvature radius R, thickness / distance, refractive index Nd, and Abbe number Vd of each lens of the optical lens of Example 1.

[0131] Table 1

[0132]

[0133] In this embodiment, the first side surface S6 and the second side surface S7 of the third lens L3, the first side surface S8 and the second side surface S9 of the fourth lens L4, and the first side surface S10 and the second side surface S11 of the fifth lens L5 of the optical lens are aspherical mirror surfaces, and the surface shape of each aspherical mirror surface can be defined by but not limited to the following aspherical formula (1).

[0134] (1)

[0135] in, x The aspheric surface is at a height of h When the position is , the distance vector height from the vertex of the aspherical surface; c is the paraxial curvature of the aspheric surface, c =1 / R (i.e., the paraxial curvature c is the radius of curvature in Table 1 above R The inverse of ); k is the cone coefficient; Ai Aspheric i -th order correction factor.

[0136] Table 2 shows the conic coefficient (k) and high-order coefficients that can be used for the aspheric mirror surface in this embodiment. A4 , A6 , A8 , A10 , A12 , A14 and A16 .

[0137] Table 2

[0138] Example 2

[0139] The following reference Figure 2 The optical lens according to Embodiment 2 of the present application is described. In this embodiment and the following embodiments, for the sake of brevity, some descriptions similar to Embodiment 1 will be omitted.

[0140] like Figure 2 As shown, the optical lens includes a first lens L1, a second lens L2, an aperture STO, a third lens L3, a fourth lens L4 and a fifth lens L5 in sequence from the first side to the second side along the optical axis.

[0141] The first lens L1 has negative power, its first side surface S1 is concave, and the second side surface S2 is convex. The second lens L2 has positive power, its first side surface S3 is convex, and the second side surface S4 is concave. The third lens L3 has negative power, its first side surface S6 is concave, and the second side surface S7 is convex. The fourth lens L4 has positive power, its first side surface S8 is concave, and the second side surface S9 is convex. The fifth lens L5 has negative power, its first side surface S10 is convex, and the second side surface S11 is concave.

[0142] In this embodiment, the first side surface S10 and the second side surface S11 of the fifth lens L5 are inversely curved.

[0143] In this embodiment, the optical lens may further include a filter or a protective glass located between the fifth lens L5 and the imaging plane IMA, and the filter or the protective glass has a first side surface S12 and a second side surface S13.

[0144] Table 3 shows the curvature radius R, thickness / distance, refractive index Nd, and dispersion coefficient Vd of each lens of the optical lens of Example 2.

[0145] Table 3

[0146]

[0147] In this embodiment, the first side surface S6 and the second side surface S7 of the third lens L3, the first side surface S8 and the second side surface S9 of the fourth lens L4, and the first side surface S10 and the second side surface S11 of the fifth lens L5 of the optical lens are aspherical mirror surfaces, and the surface shape of each aspherical mirror surface can be defined by, but is not limited to, the formula (1) given in the above-mentioned embodiment 1.

[0148] Table 4 shows the conic coefficient (k) and high-order coefficients that can be used for the aspheric mirror surface in this embodiment. A4 , A6 , A8 , A10 , A12 , A14 and A16 .

[0149] Table 4

[0150] Example 3

[0151] The following reference Figure 3 Describe the optical lens according to Example 3 of the present application.

[0152] like Figure 3 As shown, the optical lens includes a first lens L1, a second lens L2, an aperture STO, a third lens L3, a fourth lens L4 and a fifth lens L5 in sequence from the first side to the second side along the optical axis.

[0153] The first lens L1 has negative power, its first side surface S1 is convex, and the second side surface S2 is concave. The second lens L2 has positive power, its first side surface S3 is convex, and the second side surface S4 is concave. The third lens L3 has negative power, its first side surface S6 is concave, and the second side surface S7 is convex. The fourth lens L4 has positive power, its first side surface S8 is concave, and the second side surface S9 is convex. The fifth lens L5 has positive power, its first side surface S10 is convex, and the second side surface S11 is concave.

[0154] In this embodiment, the second side surface S7 of the third lens L3, the first side surface S8 and the second side surface S9 of the fourth lens L4, and the first side surface S10 and the second side surface S11 of the fifth lens L5 are recurved.

[0155] In this embodiment, the optical lens may further include a filter or a protective glass located between the fifth lens L5 and the imaging surface IMA, and the filter or the protective glass has a first side surface S12 and a second side surface S13.

[0156] Table 5 shows the curvature radius R, thickness / distance, refractive index Nd and dispersion coefficient Vd of each lens of the optical lens of Example 3.

[0157] Table 5

[0158]

[0159] In this embodiment, the first side surface S1 and the second side surface S2 of the first lens L1, the first side surface S6 and the second side surface S7 of the third lens L3, the first side surface S8 and the second side surface S9 of the fourth lens L4, and the first side surface S10 and the second side surface S11 of the fifth lens L5 of the optical lens are aspherical mirror surfaces, and the surface shape of each aspherical mirror surface can be defined by, but is not limited to, the formula (1) given in the above-mentioned embodiment 1.

[0160] Table 6 shows the conic coefficient (k) and high-order coefficients that can be used for the aspheric mirror surface in this embodiment. A4 , A6 , A8 , A10 , A12 , A14 and A16 .

[0161] Table 6

[0162] Example 4

[0163] The following reference Figure 4 Describe the optical lens according to Example 4 of the present application.

[0164] like Figure 4 As shown, the optical lens includes a first lens L1, a second lens L2, an aperture STO, a third lens L3, a fourth lens L4 and a fifth lens L5 in sequence from the first side to the second side along the optical axis.

[0165] The first lens L1 has negative power, its first side surface S1 is convex, and the second side surface S2 is concave. The second lens L2 has positive power, its first side surface S3 is convex, and the second side surface S4 is concave. The third lens L3 has negative power, its first side surface S6 is concave, and the second side surface S7 is convex. The fourth lens L4 has positive power, its first side surface S8 is concave, and the second side surface S9 is convex. The fifth lens L5 has positive power, its first side surface S10 is convex, and the second side surface S11 is concave.

[0166] In this embodiment, the second side surface S7 of the third lens L3, the first side surface S8 and the second side surface S9 of the fourth lens L4, and the first side surface S10 and the second side surface S11 of the fifth lens L5 are recurved.

[0167] In this embodiment, the optical lens may further include a filter or a protective glass located between the fifth lens L5 and the imaging surface IMA, and the filter or the protective glass has a first side surface S12 and a second side surface S13.

[0168] Table 7 shows the curvature radius R, thickness / distance, refractive index Nd and dispersion coefficient Vd of each lens of the optical lens of Example 4.

[0169] Table 7

[0170]

[0171] In this embodiment, the first side surface S1 and the second side surface S2 of the first lens L1, the first side surface S6 and the second side surface S7 of the third lens L3, the first side surface S8 and the second side surface S9 of the fourth lens L4, and the first side surface S10 and the second side surface S11 of the fifth lens L5 of the optical lens are aspherical mirror surfaces, and the surface shape of each aspherical mirror surface can be defined by, but is not limited to, the formula (1) given in the above-mentioned embodiment 1.

[0172] Table 8 shows the conic coefficient (k) and high-order coefficients that can be used for the aspheric mirror surface in this embodiment. A4 , A6 , A8 , A10 , A12 , A14 and A16 .

[0173] Table 8

[0174] Example 5

[0175] The following reference Figure 5 Describe the optical lens according to Example 5 of the present application.

[0176] like Figure 5As shown, the optical lens includes a first lens L1, a second lens L2, an aperture STO, a third lens L3, a fourth lens L4 and a fifth lens L5 in sequence from the first side to the second side along the optical axis.

[0177] The first lens L1 has negative power, its first side surface S1 is concave, and the second side surface S2 is convex. The second lens L2 has positive power, its first side surface S3 is convex, and the second side surface S4 is convex. The third lens L3 has negative power, its first side surface S6 is concave, and the second side surface S7 is convex. The fourth lens L4 has positive power, its first side surface S8 is concave, and the second side surface S9 is convex. The fifth lens L5 has negative power, its first side surface S10 is convex, and the second side surface S11 is concave.

[0178] In this embodiment, the second side surface S9 of the fourth lens L4 and the second side surface S11 of the fifth lens L5 are inversely curved.

[0179] In this embodiment, the optical lens may further include a filter or a protective glass located between the fifth lens L5 and the imaging plane IMA, and the filter or the protective glass has a first side surface S12 and a second side surface S13.

[0180] Table 9 shows the curvature radius R, thickness / distance, refractive index Nd and dispersion coefficient Vd of each lens of the optical lens of Example 5.

[0181] Table 9

[0182]

[0183] In this embodiment, the first side surface S1 and the second side surface S2 of the first lens L1, the first side surface S6 and the second side surface S7 of the third lens L3, the first side surface S8 and the second side surface S9 of the fourth lens L4, and the first side surface S10 and the second side surface S11 of the fifth lens L5 of the optical lens are aspherical mirror surfaces, and the surface shape of each aspherical mirror surface can be defined by, but is not limited to, the formula (1) given in the above-mentioned embodiment 1.

[0184] Table 10 shows the conic coefficient (k) and high-order coefficients that can be used for the aspheric mirror surface in this embodiment. A4 , A6 , A8 , A10 , A12 , A14 and A16 .

[0185] Table 10

[0186] Example 6

[0187] The following reference Figure 6Describe the optical lens according to Example 6 of the present application.

[0188] like Figure 6 As shown, the optical lens includes a first lens L1, a second lens L2, an aperture STO, a third lens L3, a fourth lens L4 and a fifth lens L5 in sequence from the first side to the second side along the optical axis.

[0189] The first lens L1 has negative power, its first side surface S1 is concave, and the second side surface S2 is convex. The second lens L2 has positive power, its first side surface S3 is convex, and the second side surface S4 is convex. The third lens L3 has negative power, its first side surface S6 is concave, and the second side surface S7 is convex. The fourth lens L4 has positive power, its first side surface S8 is concave, and the second side surface S9 is convex. The fifth lens L5 has negative power, its first side surface S10 is convex, and the second side surface S11 is concave.

[0190] In this embodiment, the second side surface S9 of the fourth lens L4 and the second side surface S11 of the fifth lens L5 are inversely curved.

[0191] In this embodiment, the optical lens may further include a filter or a protective glass located between the fifth lens L5 and the imaging plane IMA, and the filter or the protective glass has a first side surface S12 and a second side surface S13.

[0192] Table 11 shows the curvature radius R, thickness / distance, refractive index Nd and dispersion coefficient Vd of each lens of the optical lens of Example 6.

[0193] Table 11

[0194]

[0195] In this embodiment, the first side surface S1 and the second side surface S2 of the first lens L1, the first side surface S6 and the second side surface S7 of the third lens L3, the first side surface S8 and the second side surface S9 of the fourth lens L4, and the first side surface S10 and the second side surface S11 of the fifth lens L5 of the optical lens are aspherical mirror surfaces, and the surface shape of each aspherical mirror surface can be defined by, but is not limited to, the formula (1) given in the above-mentioned embodiment 1.

[0196] Table 12 shows the conic coefficient (k) and high-order coefficients that can be used for the aspheric mirror surface in this embodiment. A4 , A6 , A8 , A10 , A12 , A14 and A16 .

[0197] Table 12

[0198] Example 7

[0199] The following reference Figure 7 Describe the optical lens according to Example 7 of the present application.

[0200] like Figure 7 As shown, the optical lens includes a first lens L1, a second lens L2, an aperture STO, a third lens L3, a fourth lens L4 and a fifth lens L5 in sequence from the first side to the second side along the optical axis.

[0201] The first lens L1 has negative power, its first side surface S1 is concave, and the second side surface S2 is convex. The second lens L2 has positive power, its first side surface S3 is convex, and the second side surface S4 is concave. The third lens L3 has negative power, its first side surface S6 is concave, and the second side surface S7 is concave. The fourth lens L4 has positive power, its first side surface S8 is convex, and the second side surface S9 is convex. The fifth lens L5 has negative power, its first side surface S10 is convex, and the second side surface S11 is concave.

[0202] In this embodiment, the second side surface S7 of the third lens L3, the first side surface S8 of the fourth lens L4, and the first side surface S10 and the second side surface S11 of the fifth lens L5 are inversely curved.

[0203] In this embodiment, the optical lens may further include a filter or a protective glass located between the fifth lens L5 and the imaging plane IMA, and the filter or the protective glass has a first side surface S12 and a second side surface S13.

[0204] Table 13 shows the curvature radius R, thickness / distance, refractive index Nd and dispersion coefficient Vd of each lens of the optical lens of Example 7.

[0205] Table 13

[0206]

[0207] In this embodiment, the first side surface S6 and the second side surface S7 of the third lens L3, the first side surface S8 and the second side surface S9 of the fourth lens L4, and the first side surface S10 and the second side surface S11 of the fifth lens L5 of the optical lens are aspherical mirror surfaces, and the surface shape of each aspherical mirror surface can be defined by, but is not limited to, the formula (1) given in the above-mentioned embodiment 1.

[0208] Table 14 shows the conic coefficient (k) and high-order coefficients that can be used for the aspheric mirror surface in this embodiment. A4 , A6 , A8 , A10 , A12 , A14 and A16 .

[0209] Table 14

[0210] Example 8

[0211] The following reference Figure 8 Describe the optical lens according to Example 8 of the present application.

[0212] like Figure 8 As shown, the optical lens includes a first lens L1, a second lens L2, an aperture STO, a third lens L3, a fourth lens L4 and a fifth lens L5 in sequence from the first side to the second side along the optical axis.

[0213] The first lens L1 has negative power, its first side surface S1 is concave, and the second side surface S2 is convex. The second lens L2 has positive power, its first side surface S3 is convex, and the second side surface S4 is concave. The third lens L3 has negative power, its first side surface S6 is concave, and the second side surface S7 is concave. The fourth lens L4 has positive power, its first side surface S8 is convex, and the second side surface S9 is convex. The fifth lens L5 has negative power, its first side surface S10 is convex, and the second side surface S11 is concave.

[0214] In this embodiment, the first side surface S8 of the fourth lens L4, and the first side surface S10 and the second side surface S11 of the fifth lens L5 are inversely curved.

[0215] In this embodiment, the optical lens may further include a filter or a protective glass located between the fifth lens L5 and the imaging surface IMA, and the filter or the protective glass has a first side surface S12 and a second side surface S13.

[0216] Table 15 shows the curvature radius R, thickness / distance, refractive index Nd and dispersion coefficient Vd of each lens of the optical lens of Example 8.

[0217] Table 15

[0218]

[0219] In this embodiment, the first side surface S6 and the second side surface S7 of the third lens L3, the first side surface S8 and the second side surface S9 of the fourth lens L4, and the first side surface S10 and the second side surface S11 of the fifth lens L5 of the optical lens are aspherical mirror surfaces, and the surface shape of each aspherical mirror surface can be defined by, but is not limited to, the formula (1) given in the above-mentioned embodiment 1.

[0220] Table 16 shows the conic coefficient (k) and high-order coefficients that can be used for the aspheric mirror surface in this embodiment. A4 , A6 , A8 , A10 ,A12 , A14 and A16 .

[0221] Table 16

[0222] Example 9

[0223] The following reference Fig. 9 Describe the optical lens according to Example 9 of the present application.

[0224] like Fig. 9 As shown, the optical lens includes a first lens L1, a second lens L2, an aperture STO, a third lens L3, a fourth lens L4 and a fifth lens L5 in sequence from the first side to the second side along the optical axis.

[0225] The first lens L1 has negative power, its first side surface S1 is concave, and the second side surface S2 is convex. The second lens L2 has positive power, its first side surface S3 is convex, and the second side surface S4 is concave. The third lens L3 has positive power, its first side surface S6 is convex, and the second side surface S7 is concave. The fourth lens L4 has positive power, its first side surface S8 is concave, and the second side surface S9 is convex. The fifth lens L5 has negative power, its first side surface S10 is concave, and the second side surface S11 is concave.

[0226] In this embodiment, the first side surface S6 and the second side surface S7 of the third lens L3 and the second side surface S11 of the fifth lens L5 are recurved.

[0227] In this embodiment, the optical lens may further include a filter or a protective glass located between the fifth lens L5 and the imaging plane IMA, and the filter or the protective glass has a first side surface S12 and a second side surface S13.

[0228] Table 17 shows the curvature radius R, thickness / distance, refractive index Nd and dispersion coefficient Vd of each lens of the optical lens of Example 9.

[0229] Table 17

[0230]

[0231] In this embodiment, the first side surface S6 and the second side surface S7 of the third lens L3, the first side surface S8 and the second side surface S9 of the fourth lens L4, and the first side surface S10 and the second side surface S11 of the fifth lens L5 of the optical lens are aspherical mirror surfaces, and the surface shape of each aspherical mirror surface can be defined by, but is not limited to, the formula (1) given in the above-mentioned embodiment 1.

[0232] Table 18 shows the conic coefficient (k) and high-order coefficients that can be used for the aspheric mirror surface in this embodiment. A4 ,A6 , A8 , A10 , A12 , A14 and A16 .

[0233] Table 18

[0234] Example 10

[0235] The following reference Fig.10 An optical lens according to Example 10 of the present application is described.

[0236] like Fig.10 As shown, the optical lens includes a first lens L1, a second lens L2, an aperture STO, a third lens L3, a fourth lens L4 and a fifth lens L5 in sequence from the first side to the second side along the optical axis.

[0237] The first lens L1 has negative power, its first side surface S1 is concave, and the second side surface S2 is convex. The second lens L2 has positive power, its first side surface S3 is convex, and the second side surface S4 is concave. The third lens L3 has positive power, its first side surface S6 is convex, and the second side surface S7 is concave. The fourth lens L4 has positive power, its first side surface S8 is concave, and the second side surface S9 is convex. The fifth lens L5 has negative power, its first side surface S10 is concave, and the second side surface S11 is concave.

[0238] In this embodiment, the first side surface S6 and the second side surface S7 of the third lens L3, the second side surface S9 of the fourth lens L4, and the second side surface S11 of the fifth lens L5 are recurved.

[0239] In this embodiment, the optical lens may further include a filter or a protective glass located between the fifth lens L5 and the imaging plane IMA, and the filter or the protective glass has a first side surface S12 and a second side surface S13.

[0240] Table 19 shows the curvature radius R, thickness / distance, refractive index Nd and dispersion coefficient Vd of each lens of the optical lens of Example 10.

[0241] Table 19

[0242]

[0243] In this embodiment, the first side surface S6 and the second side surface S7 of the third lens L3, the first side surface S8 and the second side surface S9 of the fourth lens L4, and the first side surface S10 and the second side surface S11 of the fifth lens L5 of the optical lens are aspherical mirror surfaces, and the surface shape of each aspherical mirror surface can be defined by, but is not limited to, the formula (1) given in the above-mentioned embodiment 1.

[0244] Table 20 shows the conic coefficient (k) and high-order coefficients that can be used for the aspheric mirror surface in this embodiment. A4 , A6 , A8 , A10 , A12 , A14 and A16 .

[0245] Table 20

[0246] Embodiment 11

[0247] The following reference Fig.11 Describe the optical lens according to Example 11 of the present application.

[0248] like Fig.11 As shown, the optical lens includes a first lens L1, a second lens L2, an aperture STO, a third lens L3, a fourth lens L4 and a fifth lens L5 in sequence from the first side to the second side along the optical axis.

[0249] The first lens L1 has negative optical power, and its first side surface S1 is concave, and the second side surface S2 is convex. The second lens L2 has positive optical power, and its first side surface S3 is convex, and the second side surface S4 is concave. The third lens L3 has negative optical power, and its first side surface S6 is concave, and the second side surface S7 is convex. The fourth lens L4 has negative optical power, and its first side surface S8 is concave, and the second side surface S9 is convex. The fifth lens L5 has negative optical power, and its first side surface S10 is convex, and the second side surface S11 is concave.

[0250] In this embodiment, the first side surface S10 and the second side surface S11 of the fifth lens L5 are inversely curved.

[0251] In this embodiment, the optical lens may further include a filter or a protective glass located between the fifth lens L5 and the imaging plane IMA, and the filter or the protective glass has a first side surface S12 and a second side surface S13.

[0252] Table 21 shows the curvature radius R, thickness / distance, refractive index Nd and dispersion coefficient Vd of each lens of the optical lens of Example 11.

[0253] Table 21

[0254]

[0255] In this embodiment, the first side surface S6 and the second side surface S7 of the third lens L3, the first side surface S8 and the second side surface S9 of the fourth lens L4, and the first side surface S10 and the second side surface S11 of the fifth lens L5 of the optical lens are aspherical mirror surfaces, and the surface shape of each aspherical mirror surface can be defined by, but is not limited to, the formula (1) given in the above-mentioned embodiment 1.

[0256] Table 22 shows the conic coefficient (k) and high-order coefficients that can be used for the aspheric mirror surface in this embodiment. A4 , A6 , A8 , A10 , A12 , A14 and A16 .

[0257] Table 22

[0258] Example 12

[0259] The following reference Fig.12 Describe the optical lens according to Example 12 of the present application.

[0260] like Fig.12 As shown, the optical lens includes a first lens L1, a second lens L2, an aperture STO, a third lens L3, a fourth lens L4 and a fifth lens L5 in sequence from the first side to the second side along the optical axis.

[0261] The first lens L1 has negative optical power, and its first side surface S1 is concave, and the second side surface S2 is convex. The second lens L2 has positive optical power, and its first side surface S3 is convex, and the second side surface S4 is concave. The third lens L3 has negative optical power, and its first side surface S6 is concave, and the second side surface S7 is convex. The fourth lens L4 has negative optical power, and its first side surface S8 is concave, and the second side surface S9 is convex. The fifth lens L5 has negative optical power, and its first side surface S10 is convex, and the second side surface S11 is concave.

[0262] In this embodiment, the first side surface S10 and the second side surface S11 of the fifth lens L5 are inversely curved.

[0263] In this embodiment, the optical lens may further include a filter or a protective glass located between the fifth lens L5 and the imaging plane IMA, and the filter or the protective glass has a first side surface S12 and a second side surface S13.

[0264] Table 23 shows the curvature radius R, thickness / distance, refractive index Nd and dispersion coefficient Vd of each lens of the optical lens of Example 12.

[0265] Table 23

[0266]

[0267] In this embodiment, the first side surface S1 and the second side surface S2 of the first lens L1, the first side surface S6 and the second side surface S7 of the third lens L3, the first side surface S8 and the second side surface S9 of the fourth lens L4, and the first side surface S10 and the second side surface S11 of the fifth lens L5 of the optical lens are aspherical mirror surfaces, and the surface shape of each aspherical mirror surface can be defined by, but is not limited to, the formula (1) given in the above-mentioned embodiment 1.

[0268] Table 24 shows the conic coefficient (k) and high-order coefficients that can be used for the aspheric mirror surface in this embodiment. A4 , A6 , A8 , A10 , A12 , A14 and A16 .

[0269] Table 24

[0270]

[0271] Tables 25 and 26 below show some parameters of the optical lenses of Examples 1 to 12, such as the focal length value F of the entire optical lens group, the entrance pupil diameter ENPD, the total optical length TTL, the maximum field of view FOV, and the focal length value of each lens, etc. Among them, the unit of each focal length value, distance or effective radius value is millimeter (mm); the unit of FOV is degree (°).

[0272] Table 25

[0273]

[0274] Table 26

[0275]

[0276] In summary, the optical lenses of Examples 1 to 12 respectively satisfy the conditional expressions shown in Tables 27-1, 27-2, 28-1 and 28-2 below.

[0277] Table 27-1

[0278]

[0279] Table 27-2

[0280]

[0281] Table 28-1

[0282]

[0283] Table 28-2

[0284]

[0285] The present application also provides an electronic device, which may include an optical lens according to the above-mentioned embodiment of the present application and an imaging element for converting an optical image formed by the optical lens into an electrical signal. The electronic device may be an independent electronic device such as a detection distance camera, or an imaging module integrated in a detection distance device.

[0286] In addition, the electronic device may be an independent imaging device such as a vehicle-mounted camera, or an imaging module integrated in a driving assistance system.

[0287] The above description is only a preferred embodiment of the present application and an explanation of the technical principles used. Those skilled in the art should understand that the scope of the invention involved in the present application is not limited to the technical solution formed by a specific combination of the above technical features, but should also cover other technical solutions formed by any combination of the above technical features or their equivalent features without departing from the inventive concept. For example, the above features are replaced with the technical features with similar functions disclosed in this application (but not limited to) by each other to form a technical solution.

Claims

1. An optical lens, characterized in that: The optical lens comprises a first lens group, an aperture stop and a second lens group in sequence from the first side to the second side along the optical axis; The first lens group includes: a first lens with negative optical power; and a second lens with positive optical power, wherein the first side surface of the second lens is a convex surface; The second lens group includes: a third lens having optical power; a fourth lens having optical power, wherein the second side surface of the fourth lens is a convex surface; and a fifth lens having optical power, wherein at least one side surface of the fifth lens has a recurve; The focal length value F1 of the first lens and the focal length value F of the entire optical lens group satisfy: -6≤F1 / F<0; The focal length value F3 of the third lens and the focal length value F of the entire optical lens group satisfy: |F3 / F|≥1.8; The focal length value F4 of the fourth lens and the focal length value F of the entire optical lens group satisfy: F4 / F≤5; A distance d12 from the second side surface of the first lens to the first side surface of the second lens on the optical axis and a distance TTL from the center of the first side surface of the first lens to the imaging surface of the optical lens on the optical axis satisfy: d12 / TTL≤0.05; The number of lenses having optical power in the optical lens is five.

2. The optical lens according to claim 1, characterized in that: The first side surface of the first lens is a concave surface, and the second side surface is a convex surface; Or the first side surface of the first lens is convex, and the second side surface is concave.

3. The optical lens according to claim 1, characterized in that: The second side surface of the second lens is a concave surface or a convex surface.

4. The optical lens according to claim 1, characterized in that: The third lens has negative optical power, a first side surface of the third lens is concave, and a second side surface of the third lens is convex; Or the third lens has negative optical power, and its first side surface is concave, and its second side surface is concave; Or the third lens has positive optical power, and its first side surface is convex, and its second side surface is concave.

5. The optical lens according to claim 1, characterized in that: The fourth lens has positive refractive power, a first side surface of the fourth lens is concave, and a second side surface of the fourth lens is convex; Or the fourth lens has positive power, and its first side surface is convex, and its second side surface is convex; Or the fourth lens has negative optical power, and its first side surface is concave, and its second side surface is convex.

6. The optical lens according to claim 1, characterized in that: The fifth lens has positive optical power, a first side surface of the fifth lens is convex, and a second side surface of the fifth lens is concave.

7. The optical lens according to claim 1, characterized in that: The fifth lens has negative optical power, The first side surface is convex, and the second side surface is concave; Or the first side surface is a concave surface and the second side surface is a concave surface.

8. The optical lens according to any one of claims 1 to 7, characterized in that: The combined focal length value F12 of the first lens and the second lens is positive, and the combined focal length value F12 of the first lens and the second lens and the entire group focal length value F of the optical lens satisfy: 0.8014≤F12 / F≤1.

5.

9. The optical lens according to any one of claims 1 to 7, characterized in that: The entire focal length value F of the optical lens and the distance TTL from the center of the first side surface of the first lens to the imaging surface of the optical lens on the optical axis satisfy: TTL / F≤3.

10. The optical lens according to any one of claims 1 to 7, characterized in that: The focal length value F2 of the second lens and the focal length value F of the entire set of optical lenses satisfy: F2 / F≤2.

11. The optical lens according to any one of claims 1 to 7, characterized in that: The focal length F3 of the third lens and the focal length F2 of the second lens satisfy: |F3| / F2≥1.

5.

12. The optical lens according to any one of claims 1 to 7, characterized in that: The radius of curvature R52 of the second side surface of the fifth lens and the focal length F of the entire optical lens group satisfy: R52 / F≤12.

13. The optical lens according to any one of claims 1 to 7, characterized in that: The focal length value F1 of the first lens and the focal length value F of the entire optical lens group satisfy: -5.5≤F1 / F≤-2.7008.

14. The optical lens according to any one of claims 1 to 7, characterized in that: A curvature radius R11 of the first side surface of the first lens and a curvature radius R12 of the second side surface of the first lens satisfy: 0.1≤R11 / R12≤5.

15. The optical lens according to any one of claims 1 to 7, characterized in that: A focal length F1 of the first lens and a curvature radius R21 of the first side surface of the second lens satisfy: |F1 / R21|≥3.

16. The optical lens according to any one of claims 1 to 7, characterized in that: The maximum light clearance aperture D of the first side surface of the first lens, the maximum field of view FOV of the optical lens, and the image height H corresponding to the maximum field of view of the optical lens satisfy: 0.0078×180≤D / H / FOV×180≤0.0096×180.

17. The optical lens according to any one of claims 1 to 7, characterized in that: The sag value Sag31 corresponding to the maximum light clearance aperture of the first side surface of the third lens, the sag value Sag32 corresponding to the maximum light clearance aperture of the second side surface of the third lens, and the center thickness d31 of the third lens on the optical axis satisfy: |Sag31-Sag32| / d31≤0.

44.

18. The optical lens according to any one of claims 1 to 7, characterized in that: The focal length value F4 of the fourth lens and the focal length value F of the entire set of optical lenses satisfy: F4 / F≤3.

19. The optical lens according to any one of claims 1 to 7, characterized in that: The maximum field of view FOV of the optical lens satisfies: 40°≤FOV≤100°.

20. The optical lens according to claim 6, characterized in that: The focal length value F5 of the fifth lens and the focal length value F of the entire optical lens group satisfy: F5 / F≥10.

21. The optical lens according to claim 7, characterized in that: The focal length value F5 of the fifth lens and the focal length value F of the entire optical lens group satisfy: -6≤F5 / F<0.

22. The optical lens according to any one of claims 1 to 5, characterized in that: The optical lens satisfies at least one of the following conditions: 1.5468≤TTL / F≤2.5; 0.6697≤F2 / F≤1.2; 0.4≤F2 / F≤1.2; 2≤|F3| / F2≤12.0917; -10≤F3 / F2≤-1.5; 0.0092≤d12 / TTL≤0.0109; d12 / TTL≤0.015; 0.0092≤d45 / TTL≤0.0114; d45 / TTL≤0.015; -5≤F5 / F≤-0.1; 12≤F5 / F≤21.9645; R52 / F≤10; 0.1≤R52 / F≤9; H / D52≥0.75; 0.9≤H / D52≤1.5; 0.15≤R11 / R12≤4; TTL / H≤3; 0.5≤TTL / H≤2; |F1 / R21|≥4; 4.5≤|F1 / R21|≤12; |R21 / R22|≤0.3; |R21 / R22|≤0.2; D / H / FOV×180≤2.7; 2 ≤|F3 / F|≤9.4641; F3 / F≤-1.8; -10≤F3 / F≤-2; |Sag31-Sag32| / d31≤0.38; |arctan(Sag21 / (D21 / 2))| / |arc tan(Sag22 / (D22 / 2))|≥3;5≤|arctan(Sag21 / (D21 / 2))| / |arctan(Sag22 / (D22 / 2))|≤30;0.4≤F / H≤2;0.5 ≤F / H≤1.5; 0.5≤(H / 2) / (F×tan(θ / 2))≤2; 0.7≤(H / 2) / (F×tan(θ / 2))≤1.5; F / ENPD≤2.2; F / ENPD≤2.1; F12 / F ≤2; 0.3≤F12 / F≤1.5; 0.1≤F4 / F≤2; -0.4313≤F4 / F3≤-0.2248; -0.8≤F4 / F3≤-0.1; 0.1816≤BFL / TTL≤0.2358; 0.15≤BFL / TTL≤0.2358; (d31+d41+d51) / TTL≤0.5; 0.15≤(d31+d41+d51) / TTL≤0.43; 0.15≤d23 / F2≤0.2977; 0.17≤d23 / F2≤0.4; 35°≤(FOV×F) / H≤70°; 37°≤(FOV×F) / H≤66°; TTL / H / FOV×180≤5.5; 2.5≤TTL / H / FOV×180≤5; 0.75≤(1 / F1+1 / F2) / (1 / F)≤1.1230; 0.8≤(1 / F1+1 / F2) / (1 / F)≤2; 7.6487≤FOV / H≤9.1933; FOV / H≤12; 50°≤FOV≤80°, wherein TTL is the distance from the center of the first side surface of the first lens to the imaging surface of the optical lens on the optical axis, F is the focal length value of the entire group of the optical lens, F1 is the focal length value of the first lens, F2 is the focal length value of the second lens, F3 is the focal length value of the third lens, F5 is the focal length value of the fifth lens, d12 is the focal length value of the first lens, The distance from the second side surface of the first lens to the first side surface of the second lens on the optical axis, d45 is the distance from the second side surface of the fourth lens to the first side surface of the fifth lens on the optical axis, R52 is the curvature radius of the second side surface of the fifth lens, D52 is the maximum clear aperture of the second side surface of the fifth lens, H is the image height corresponding to the maximum field of view of the optical lens, R11 is the curvature radius of the first side surface of the first lens, R12 is the curvature radius of the second side surface of the first lens, R21 is the curvature radius of the first side surface of the second lens, and R22 is the curvature radius of the second side surface of the second lens. D is the maximum aperture of the first side of the first lens, FOV is the maximum field of view of the optical lens, Sag31 is the vector height value corresponding to the maximum aperture of the first side of the third lens, Sag32 is the vector height value corresponding to the maximum aperture of the second side of the third lens, Sag21 is the vector height value corresponding to the maximum aperture of the first side of the second lens, Sag22 is the vector height value corresponding to the maximum aperture of the second side of the second lens, D21 is the maximum aperture of the first side of the second lens, D22 is the maximum aperture of the second side of the second lens, θ is the maximum aperture of the first side of the second lens, The radian value corresponding to the maximum field of view angle of the optical lens, F12 is the combined focal length of the first lens and the second lens, F4 is the focal length of the fourth lens, BFL is the distance from the center of the second side surface of the fifth lens to the imaging surface of the optical lens on the optical axis, d31 is the center thickness of the third lens on the optical axis, d41 is the center thickness of the fourth lens on the optical axis, d51 is the center thickness of the fifth lens on the optical axis, d23 is the distance from the second side surface of the second lens to the first side surface of the third lens on the optical axis, and ENPD is the entrance pupil diameter of the optical lens.

23. An electronic device, characterized in that: The invention comprises an optical lens according to any one of claims 1 to 22 and an imaging element for converting an optical image formed by the optical lens into an electrical signal.

Images