Optical lenses and electronic equipment

Abstract

The present application discloses an optical lens and an electronic device. The optical lens comprises a first lens with negative optical power, a second lens with optical power, a third lens with positive optical power, a fourth lens with optical power, a fifth lens with optical power and a sixth lens with positive optical power; the positive and negative properties of the optical powers of the fourth lens and the fifth lens are opposite; the center thickness d8 of the fourth lens on the optical axis, the center thickness d9 of the fifth lens on the optical axis 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 0.04≤(d8+d9) / TTL≤0.28; the effective focal length F2 of the second lens and the effective focal length F of the optical lens satisfy 2.8≤|F2 / F|; the effective focal length F6 of the sixth lens and the effective focal length F of the optical lens satisfy 1.25≤F6 / F≤3.5; the air interval d34 between the third lens and the fourth lens on the optical axis 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 0.12≤d34 / TTL≤0.32.

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 rise of forward-looking cameras, driver assistance systems and unmanned driving markets, automotive lenses are increasingly used in automotive assisted driving systems, and the market's requirements for automotive lenses are also getting higher and higher, which is mainly reflected in the following aspects: 1) Based on the consideration of product aesthetics, automobile manufacturers usually install external lenses in concealed positions and require them to be smaller in size. Therefore, automotive lenses are becoming more and more miniaturized, but it is currently difficult for automotive lenses to simultaneously meet the requirements of high resolution and small aperture; 2) Automotive lenses need to achieve a large field of view and a long focal length while being miniaturized, and improve the central angle resolution; 3) In order to obtain a larger amount of information, the forward-looking lens needs to image a larger field of view angle. At the same time, in order to meet the requirements of specific usage scenarios, the forward-looking lens also needs to take into account the special needs of a long back focal length and a small CRA (Chief Ray Angle); 4) Automotive lenses need to cooperate with the development of chips to meet the requirements of high resolution.

[0003] At present, the existing automotive lenses in the prior art have the following main problems: 1) The existing automotive lenses cannot simultaneously meet the requirements of high resolution and miniaturization; 2) Although the existing automotive lenses can achieve a clarity of one million pixels, the lens aberrations such as chromatic aberration, astigmatism, and distortion are relatively serious; 3) The existing automotive lenses have weak light transmission capabilities and cannot adapt to dark environments at night or on rainy days; 4) The existing automotive lenses cannot simultaneously meet the requirements of small front port diameter and miniaturization; 5) The existing automotive lenses cannot meet the special requirements of back focal length and small CRA on the basis of achieving miniaturization; 6) While the existing automotive lenses meet the large field of view angle, the large-angle resolution is not high enough. Summary of the invention

[0004] In a first aspect, the present application provides an optical lens, which includes, in order from the first side to the second side along the optical axis: a first lens with negative optical power, a second lens with optical power, a third lens with positive optical power, a fourth lens with optical power, a fifth lens with optical power, and a sixth lens with positive optical power. The first side surface of the first lens is convex, and the second side surface is concave; the first side surface of the second lens is concave; the first side surface of the third lens is convex; and the first side surface of the sixth lens is convex. The positive and negative properties of the optical powers of the fourth lens and the fifth lens are opposite; the center thickness d8 of the fourth lens on the optical axis, the center thickness d9 of the fifth lens on the optical axis and the distance TTL on the optical axis from the center of the first side surface of the first lens to the imaging surface of the optical lens satisfy: 0.04≤(d8+d9) / TTL≤0.28; the effective focal length F2 of the second lens and the effective focal length F of the optical lens satisfy: 2.8≤|F2 / F|; the effective focal length F6 of the sixth lens and the effective focal length F of the optical lens satisfy: 1.25≤F6 / F≤3.5; the air interval d34 on the optical axis between the third lens and the fourth lens and the distance TTL on the optical axis from the center of the first side surface of the first lens to the imaging surface of the optical lens satisfy: 0.12≤d34 / TTL≤0.32.

[0005] In one embodiment, the second lens has positive optical power, and its second side surface is convex; or the second lens has negative optical power, and its second side surface is convex or concave.

[0006] In one embodiment, the second side surface of the third lens is a convex surface or a concave surface.

[0007] In one embodiment, the fourth lens has negative optical power, its first side surface is convex or concave, and its second side surface is concave; or the fourth lens has positive optical power, its first side surface is convex, and its second side surface is convex.

[0008] In one embodiment, the fifth lens has positive optical power, and its first side surface is convex, and its second side surface is convex; or the fifth lens has negative optical power, and its first side surface is concave, and its second side surface is convex.

[0009] In one embodiment, the second side surface of the sixth lens is a convex surface or a concave surface.

[0010] In one embodiment, the optical lens satisfies: 0.15≤BFL / TTL≤0.285, wherein BFL is the distance from the center of the second side surface of the sixth 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.

[0011] In one embodiment, the optical lens satisfies: 1≤F3 / F6≤2.5, wherein F3 is the effective focal length of the third lens, and F6 is the effective focal length of the sixth lens.

[0012] In one embodiment, the optical lens satisfies: 0.5≤(H / 2) / (F×tan(θ / 2))≤0.95, wherein H is the image height corresponding to the maximum field of view angle of the optical lens, F is the effective focal length of the optical lens, and θ is the radian value corresponding to the maximum field of view angle of the optical lens.

[0013] In one embodiment, the optical lens satisfies: 2.2≤R1 / R2≤100, wherein R1 is the central curvature radius of the first side surface of the first lens, and R2 is the central curvature radius of the second side surface of the first lens.

[0014] In one embodiment, the optical lens satisfies: 3≤F45 / F≤200, wherein F45 is the combined focal length of the fourth lens and the fifth lens, and F is the effective focal length of the optical lens.

[0015] In one embodiment, the optical lens satisfies: 6≤TTL / F≤8.5, 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, and F is the effective focal length of the optical lens.

[0016] In one embodiment, the optical lens satisfies: 0.005≤D / H / FOV≤0.025, wherein D is the maximum effective light clearance aperture of the first side surface of the first lens corresponding to the maximum field of view of the optical lens, 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.

[0017] In one embodiment, the optical lens satisfies: 0.4≤F / H≤0.85, wherein F is the effective focal length of the optical lens, and H is the image height corresponding to the maximum field angle of the optical lens.

[0018] In one embodiment, the optical lens satisfies: -2.5≤F1 / F≤-1, wherein F1 is the effective focal length of the first lens, and F is the effective focal length of the optical lens.

[0019] In one embodiment, the optical lens satisfies: 2.65≤F3 / F≤5, wherein F3 is the effective focal length of the third lens, and F is the effective focal length of the optical lens.

[0020] In one embodiment, the optical lens satisfies at least one of the following: 2.0≤TTL / DMAX≤4.5, 0.03≤TTL / H / FOV≤0.08, 0.2≤(F×θ) / D≤0.18, 0.08≤D / H / F≤0.8, 0.85≤DST / F≤1.85, 1.45≤F / ENPD≤1.65, 0.008≤arctan(SAG1 / (D / 2))≤0.5, 1.25≤R5 / F≤8, -1.5≤R2 / R3≤-0.015, 1.0≤R11 / F≤5, wherein DMAX is the maximum aperture of all lenses corresponding to the maximum field of view of the optical lens, and H is the optical The image height corresponding to the maximum field of view of the lens, FOV is the maximum field of view of the optical lens, θ is the radian value corresponding to the maximum field of view of the optical lens, D is the maximum effective aperture of the first side of the first lens corresponding to the maximum field of view of the optical lens, the optical lens also includes an aperture, DST is the effective aperture of the aperture, ENPD is the entrance pupil diameter of the optical lens, SAG1 is the vector height corresponding to the first side of the first lens at the maximum field of view of the optical lens, R5 is the central curvature radius of the first side of the third lens, R2 is the central curvature radius of the second side of the first lens, R3 is the central curvature radius of the first side of the second lens, and R11 is the central curvature radius of the first side of the sixth lens.

[0021] In one embodiment, the optical lens satisfies at least one of the following: 2.75≤TTL / DMAX≤3.78, 0.039≤TTL / H / FOV≤0.06, 7≤TTL / F≤7.6, 0.010≤D / H / FOV≤0.02, 0.3≤(F×θ) / D≤0.12, 0.12≤D / H / F≤0.6, 0.17≤BFL / TTL≤0.275, 1.05≤F3 / F6≤1.8, 2.05≤F6 / F≤3.1, 2.7≤F3 / F≤4.6, 0.125≤d34 / TT L≤0.29, -2≤F1 / F≤-1.4, 0.5≤F / H≤0.7, 3.5≤|F2 / F|≤225, 3.8≤F45 / F≤70, 1.1≤DST / F≤1.45, 1.5≤F / ENPD≤1.62, 0.6≤(H / 2 ) / (F×tan(θ / 2))≤0.9,0.008≤arctan(SAG1 / (D / 2))≤0.3,2.5≤R1 / R2≤52,0.07≤(d8+d9) / TTL≤0.22,1.45≤R5 / F≤7.2,-0 .8≤R2 / R3≤-0.024, 1.2≤R11 / F≤4.1, wherein DMAX is the maximum aperture of all lenses corresponding to the maximum field of view of the optical lens, H is the image height corresponding to the maximum field of view of the optical lens, FOV is the maximum field of view of the optical lens, θ is the radian value corresponding to the maximum field of view of the optical lens, D is the maximum effective aperture of the first side surface of the first lens corresponding to the maximum field of view of the optical lens, BFL is the distance from the center of the second side surface of the sixth lens to the imaging surface of the optical lens on the optical axis, F3 is the effective focal length of the third lens, F1 is the effective focal length of the first lens, F45 is the combined focal length of the fourth lens and the fifth lens, the optical lens also includes a diaphragm, DST is the effective aperture of the diaphragm, ENPD is the entrance pupil diameter of the optical lens, SAG1 is the sag corresponding to the first side surface of the first lens at the maximum field of view of the optical lens, R1 is the curvature radius of the first side surface of the first lens, R2 is the curvature radius of the second side surface of the first lens, R5 is the central curvature radius of the first side surface of the third lens, R3 is the central curvature radius of the first side surface of the second lens, and R11 is the central curvature radius of the first side surface of the sixth lens.

[0022] In one embodiment, the optical lens satisfies at least one of the following: 2.9014≤TTL / DMAX≤3.5241, 0.0450≤TTL / H / FOV≤0.0531, 7.1940≤TTL / F≤7.4137, 0.0138≤D / H / FOV≤0.0183, 0.6311≤(F×θ) / D≤0.7684, 0.2793≤D / H / F≤0.3724, 0.1975≤BFL / TTL≤0.2602, 1.1350≤F3 / F6≤1.5695, 2.3568≤F6 / F≤2.8270, 2.8814≤F3 / F≤4.43 53, 0.1280≤d34 / TTL≤0.2255, -1.8738≤F1 / F≤-1.5233, 0.5625≤F / H≤0.6759, 4.5765≤|F2 / F|≤137.5919, 5.0228≤F45 / F≤46.0526, 1.1838≤ DST / F≤1.3927, 1.5600≤F / ENPD≤1.5600, 0.7168≤(H / 2) / (F×tan(θ / 2))≤0.8615, 0.0162≤arctan(SAG1 / (D / 2))≤0.1973, 2.8346≤R1 / R2≤33 .4638, 0.0920≤(d8+d9) / TTL≤0.1803, 1.6538≤R5 / F≤5.2622, -0.5025≤R2 / R3≤-0.0371, 1.7972≤R11 / F≤3.5797, wherein DMAX is the maximum aperture of all lenses corresponding to the maximum field of view of the optical lens, H is the image height corresponding to the maximum field of view of the optical lens, FOV is the maximum field of view of the optical lens, θ is the radian value corresponding to the maximum field of view of the optical lens, D is the maximum effective aperture of the first side of the first lens corresponding to the maximum field of view of the optical lens, and BFL is the center of the second side of the sixth lens The optical lens further comprises an aperture, DST is the effective aperture of the aperture, ENPD is the entrance pupil diameter of the optical lens, SAG1 is the sagittal height corresponding to the first side surface of the first lens at the maximum field of view of the optical lens, R1 is the curvature radius of the first side surface of the first lens, R2 is the curvature radius of the second side surface of the first lens, R5 is the central curvature radius of the first side surface of the third lens, R3 is the central curvature radius of the first side surface of the second lens, and R11 is the central curvature radius of the first side surface of the sixth lens.

[0023] The second 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.

[0024] The optical lens provided by the present application adopts six lenses, and the shape and optical power of each lens are reasonably set. The first lens has negative optical power and a convex-concave surface, the first side surface of the second lens is concave, the third lens and the sixth lens both have positive optical power, and the first side surfaces are both convex, the positive and negative properties of the optical power of the fourth lens and the fifth lens are opposite, and also meet 0.04≤(d8+d9) / TTL≤0.28, 2.8≤|F2 / F|, 1.25≤F6 / F≤3.5 and 0.12≤d34 / TTL≤0.32, and on the basis of miniaturization, the center of the fourth lens and the fifth lens is reasonably increased. The thickness is conducive to enhancing the ability to control light and improving relative illumination; the focal lengths of the second lens and the sixth lens are reasonably distributed, so that the light can be smoothly transitioned in the optical system, which is conducive to collecting light, ensuring the amount of light, and improving the resolution. The sixth lens can make the light incident on the imaging surface approximately vertically, which is conducive to achieving a small CRA. At the same time, on the basis of miniaturization, the air gap between the third lens and the fourth lens is enlarged, which is conducive to the light passing through a longer distance in a gentle trend and reducing the sensitivity. Therefore, the optical lens provided by the present application has at least one beneficial effect of miniaturization, high illumination, low sensitivity, small CRA, and high resolution. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Other features, objects and advantages of the present application will become more apparent by reading the detailed description of non-limiting embodiments made with reference to the following drawings. In the drawings:

[0026] Figure 1 A schematic structural diagram of an optical lens according to Embodiment 1 of the present application is shown;

[0027] Figure 2 shows a distortion curve of the optical lens according to Example 1 of the present application;

[0028] Figure 3 A schematic structural diagram of an optical lens according to Embodiment 2 of the present application is shown;

[0029] Figure 4 shows a distortion curve of the optical lens according to Example 2 of the present application;

[0030] Figure 5 The modulation transfer function curves of the optical lenses of Example 1 and Example 2 are shown;

[0031] Figure 6 A schematic structural diagram of an optical lens according to Embodiment 3 of the present application is shown;

[0032] Figure 7 shows a distortion curve of the optical lens according to Example 3 of the present application;

[0033] Figure 8 A schematic structural diagram of an optical lens according to Embodiment 4 of the present application is shown;

[0034] Fig. 9 shows a distortion curve of the optical lens according to Example 4 of the present application;

[0035] Fig.10 A schematic structural diagram of an optical lens according to Embodiment 5 of the present application is shown;

[0036] Fig.11 shows a distortion curve of the optical lens according to Example 5 of the present application;

[0037] Fig.12 A schematic structural diagram of an optical lens according to Embodiment 6 of the present application is shown;

[0038] Fig.13 shows a distortion curve of the optical lens according to Example 6 of the present application;

[0039] Fig.14 A schematic structural diagram of an optical lens according to Embodiment 7 of the present application is shown;

[0040] Fig.15 shows a distortion curve of the optical lens according to Example 7 of the present application;

[0041] Fig.16 A schematic structural diagram of an optical lens according to Example 8 of the present application is shown;

[0042] Fig.17 shows a distortion curve of the optical lens according to Example 8 of the present application;

[0043] Fig.18 A schematic structural diagram of an optical lens according to Example 9 of the present application is shown;

[0044] Fig.19 shows a distortion curve of the optical lens according to Example 9 of the present application;

[0045] Fig. 20 A schematic structural diagram of an optical lens according to Embodiment 10 of the present application is shown;

[0046] Fig.21 shows a distortion curve of the optical lens according to Example 10 of the present application;

[0047] Fig. 22 A schematic structural diagram of an optical lens according to Example 11 of the present application is shown;

[0048] Fig.23 shows a distortion curve of the optical lens according to Example 11 of the present application;

[0049] Fig.24 A schematic structural diagram of an optical lens according to Embodiment 12 of the present application is shown;

[0050] Fig.25 shows a distortion curve of the optical lens according to Example 12 of the present application;

[0051] Fig.26 A schematic structural diagram of an optical lens according to Embodiment 13 of the present application is shown;

[0052] Fig. 27 shows a distortion curve of the optical lens according to Example 13 of the present application;

[0053] Fig.28 A schematic structural diagram of an optical lens according to Embodiment 14 of the present application is shown;

[0054] Fig.29 shows a distortion curve of the optical lens according to Example 14 of the present application;

[0055] Fig.30 A schematic structural diagram of an optical lens according to Embodiment 15 of the present application is shown;

[0056] Fig.31 shows a distortion curve of the optical lens according to Example 15 of the present application;

[0057] Fig.32 A schematic structural diagram of an optical lens according to Embodiment 16 of the present application is shown;

[0058] Fig.33 shows a distortion curve of the optical lens according to Example 16 of the present application;

[0059] Fig.34 A schematic structural diagram of an optical lens according to Embodiment 17 of the present application is shown;

[0060] Fig.35 shows a distortion curve of the optical lens according to Example 17 of the present application;

[0061] Fig.36 A schematic structural diagram of an optical lens according to Example 18 of the present application is shown;

[0062] Fig.37 The distortion curve of the optical lens according to Example 18 of the present application is shown. DETAILED DESCRIPTION

[0063] 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.

[0064] 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.

[0065] 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.

[0066] 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.

[0067] It should be understood that the optical lens provided in the present application can be used for both video and projection, and can also be used for laser radar lenses. When the optical lens provided in the present application is used for a camera lens or a laser radar receiving end 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. The light from the object side can be imaged on the image side, for example, wherein the camera lens can be, for example, a vehicle-mounted camera, an infrared camera, a drone camera, a night vision camera, a security monitoring camera, etc.; when the optical lens provided in the present application is used for a projection lens or a radar transmitting end lens, the "first side" referred to in this article may refer to the object side, and the "second side" may refer to the light source side. The light from the light source side is projected to the first side after passing through the optical lens, for example, an image can be formed on the first side or an illuminated area can be illuminated.

[0068] 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.

[0069] 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.

[0070] 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.

[0071] The features, principles and other aspects of the present application are described in detail below.

[0072] In an exemplary embodiment, the optical lens includes, for example, six lenses having optical power, namely, a first lens, a second lens, a third lens, a fourth lens, a fifth lens, and a sixth lens, which are arranged in sequence from the first side to the second side along the optical axis.

[0073] In an exemplary embodiment, the optical lens provided in the present application can be used as, for example, a vehicle-mounted lens or a laser radar receiving end lens. In this 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, for example. The second side of the optical lens can be provided with an imaging surface of the optical lens.

[0074] In an exemplary embodiment, the optical lens provided in the present application can be used as, for example, a projection lens or a laser radar transmitting end lens, in which case the first side of the optical lens can be the object side, and the second side can be the light source side. Light from the light source side passes through the optical lens and is projected to the object side, for example, to form an image or illuminate an area on the object side, and the second side of the optical lens can be provided with a light source surface of the optical lens.

[0075] 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).

[0076] In an exemplary embodiment, the first lens has negative optical power, and its first side surface is convex and its second side surface is concave. The first lens has negative optical power and has a divergent effect on light, and its first side surface is a convex surface facing the object side, and the incident angle of light is small, which is conducive to collecting more light into the optical system and realizing imaging with a large field of view angle; the second side surface of the first lens is a concave surface, which can control the direction of the large-angle light at the edge of the lens, and the light emitted from the second side surface of the first lens can enable the subsequent optical system to have a larger light receiving surface.

[0077] In an exemplary embodiment, the second lens has a negative optical power, and its first side surface is a concave surface, and its second side surface is a concave surface. The second lens has a negative optical power, and both the first side surface and the second side surface are concave surfaces, which can smoothly transition to collect the divergent light through the first lens with a negative optical power, reduce the aberration of large-angle imaging, and at the same time, the third lens with a positive optical power can effectively reduce the projection height of the light on the lens, which is conducive to reducing the overall aperture of the lens, achieving miniaturization and reducing costs.

[0078] In an exemplary embodiment, the second lens has negative power, and its first side surface is concave, and its second side surface is convex. The second lens has negative power, which can smoothly transition the front light and disperse the central light and edge light of each field of view, which is conducive to expanding the aperture of the aperture. The second lens is a meniscus shape concave toward the object side, and is matched with the third lens with positive power, which can effectively reduce the projection height of the light on the lens, which is conducive to reducing the overall aperture of the lens, achieving miniaturization and reducing costs.

[0079] In an exemplary embodiment, the second lens has positive focal power, and its first side surface is concave, and its second side surface is convex. The second lens has a smaller positive focal power, and has a smaller improvement on the light trend. The light emitted through the second lens can still maintain an upward trend. Under the same field of view, the light emitted through the second side surface of the first lens can make the subsequent optical system have a larger light receiving surface, which is beneficial to expand the image surface on the one hand; on the other hand, it can realize a larger physical aperture of the diaphragm, a larger aperture, and thus achieve a larger amount of light entering, and increase the brightness of the image surface; at the same time, the first side surface of the second lens is a concave surface, which cooperates with the concave surface of the second side surface of the first lens to achieve a reduction in the diameter of the front end of the lens, reduce the volume, and facilitate miniaturization and cost reduction.

[0080] In an exemplary embodiment, the third lens has positive focal length, and its first side surface is convex, and its second side surface is convex. The third lens has positive focal length, which is conducive to light convergence, further makes the light trend transition smoothly, is easy to obtain small aberration, achieves high resolution, reduces the caliber and tube length of the optical lens barrel, and is conducive to miniaturization; the first side surface and the second side surface of the third lens are both convex, which can make the light converge twice, reduce the deflection of the light on these two sides, and is conducive to reducing the sensitivity of the system and reducing the diameter of the rear port of the system.

[0081] In an exemplary embodiment, the third lens has positive focal length, and its first side surface is convex and its second side surface is concave. The third lens has positive focal length, which is conducive to light convergence, further makes the light trend transition smoothly, is easy to obtain small aberration, achieves high resolution, reduces the caliber and tube length of the optical lens barrel, and is conducive to miniaturization; the first side surface of the third lens is convex and the second side surface is concave, so that the light emitted from the second lens first converges through the first side surface of the third lens, and then moderately diverges through the second side surface of the third lens, which is conducive to reducing spherical aberration and improving the resolution ability of the optical system.

[0082] In an exemplary embodiment, the fourth lens has positive power, and its first side surface is convex, and its second side surface is convex. The fourth lens has positive power, and its first side surface and second side surface are both convex, which converges the light. When used in conjunction with the third lens with positive power, the incident height of the light can be further reduced, the back port diameter can be reduced, miniaturization can be achieved, and CRA can be reduced.

[0083] In an exemplary embodiment, the fourth lens has a negative optical power, and its first side surface is a concave surface, and its second side surface is a concave surface. The first side surface of the fourth lens receives the light from the third lens with positive optical power, and has a converging effect on the light, which continuously changes the trend of the light and also brings about a large aberration; the fourth lens is a negative lens, and the first side surface and the second side surface are both concave surfaces, which has a divergent effect on the light. By controlling the shape and focal length of the fourth lens, various aberrations caused by the positive lens in front can be effectively corrected, the resolution can be improved, and the effective aperture of the rear lens group can be adjusted at the same time.

[0084] In an exemplary embodiment, the fourth lens has a negative optical power, and its first side surface is a convex surface, and its second side surface is a concave surface. The first side surface of the fourth lens receives the light from the third lens with positive optical power, and has a converging effect on the light, which continuously changes the trend of the light and also brings about a large aberration; the fourth lens is a negative lens, the first side surface is a convex surface, and can smoothly receive the front light, and the second side surface is concave, which can have a divergent effect on the light. By controlling the shape and focal length of the fourth lens, various aberrations caused by the front positive lens can be effectively corrected, the resolution can be improved, and the effective aperture of the rear lens group can be adjusted at the same time.

[0085] In an exemplary embodiment, the fifth lens has positive power, and its first side surface is convex, and its second side surface is convex. The fifth lens has positive power, and its first side surface and second side surface are both convex, which can effectively converge light, and by cooperating with the fourth lens, it can further reduce aberrations, and at the same time, the light can be effectively and smoothly converged at the end, so that the light can reach the imaging surface smoothly, reducing the overall weight and cost.

[0086] In an exemplary embodiment, the fifth lens has negative optical power, and its first side surface is concave and its second side surface is convex. The fifth lens has negative optical power and collects the light entering through the fourth lens, so that the light trend transitions smoothly, which is conducive to improving the resolution; the first side surface of the fifth lens is concave, which helps to make the light trend upward, thereby expanding the image size.

[0087] In an exemplary embodiment, the fourth lens and the fifth lens may form a cemented lens. By using the cemented lens, the overall structure of the optical lens can be made compact while eliminating chromatic aberration, meeting the requirements of miniaturization, and reducing the tolerance sensitivity problems such as tilt and eccentricity generated by the lens unit during the assembly process. The cemented lens may be composed of a positive lens and a negative lens, respectively, wherein the positive lens has a lower refractive index and the negative lens has a higher refractive index (relative to the positive lens). The combination of high and low refractive indices is conducive to the rapid transition of the front light, reduces aberrations, increases the aperture, and improves the amount of light passing.

[0088] In an exemplary embodiment, the sixth lens has positive focal power, and its first side surface is convex, and its second side surface is convex. The sixth lens has positive focal power, a large focal length, and a small change in the light trend, which can make the light smoothly transition to the imaging surface, improve the astigmatism and field curvature of the imaging, and improve the resolution of the optical system; the first side surface and the second side surface of the sixth lens are both convex, so that the light is converged twice, and after passing through the second side surface of the sixth lens, the marginal light is deflected toward the optical axis, which helps to shorten the physical distance, reduce the total length of the optical system, and facilitate miniaturization; the sixth lens can fully correct various aberrations of the optical system, and can improve the resolution, optimize the distortion, CRA and other optical properties under the premise of compact structure.

[0089] In an exemplary embodiment, the sixth lens has positive power, a first side surface thereof is a convex surface, and a second side surface is a concave surface. The sixth lens has positive power and a flat lens shape, which can smoothly transition light to the imaging surface, improve the astigmatism and field curvature of the imaging, and improve the resolution of the optical system; the sixth lens can fully correct various aberrations of the optical system, and can improve resolution, optimize distortion, CRA and other optical properties under the premise of compact structure.

[0090] In an exemplary embodiment, the first side surface and the second side surface of the first lens are both aspherical mirror surfaces. The curvatures of the aspherical surfaces are different at different positions, which is beneficial to correcting system aberrations and field curvatures, and improving the resolution of the optical system. The first lens is set as an aspherical lens, which is beneficial to collecting edge field light, compressing the height of the edge field light incident on the image plane, achieving central high-angle resolution, resolving more detail information, improving field curvature and astigmatism, and improving resolution. More specifically, the first side surface of the first lens may have a reverse curve, for example, the central part of the first side surface is convex, and the edge part is concave, so that the edge light enters the first lens with a clear light turn, changing the trend of large-angle light, which is beneficial to collecting large-angle light in a limited space, allowing the light to reach the image plane smoothly, and improving resolution.

[0091] In an exemplary embodiment, an aperture for limiting the light beam may be provided between the third lens and the fourth lens. The aperture is conducive to effectively restricting the light entering the optical system, reasonably distributing the height of the front and rear light beams, shortening the total length of the optical system, and reducing the lens diameter at the rear end of the optical 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.

[0092] In an exemplary embodiment, the optical lens according to the present application may satisfy: 2.0≤TTL / DMAX≤4.5, wherein TTL is the distance on the optical axis from the center of the first side surface of the first lens to the imaging surface of the optical lens, and DMAX is the maximum clear aperture of all lenses corresponding to the maximum field angle of the optical lens. Satisfying 2.0≤TTL / DMAX≤4.5 and controlling the maximum clear aperture and total optical length of the optical lens can make the entire optical system more compact and achieve miniaturization. More specifically, TTL and DMAX can further satisfy 2.75≤TTL / DMAX≤3.78, which is conducive to better miniaturization. TTL and DMAX can further satisfy 2.9014≤TTL / DMAX≤3.5241, which can further achieve miniaturization.

[0093] In an exemplary embodiment, the optical lens according to the present application may satisfy: 0.03≤TTL / H / FOV≤0.08, wherein TTL is the distance on the optical axis from the center of the first side surface of the first lens to the imaging surface of the optical lens, 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 0.03≤TTL / H / FOV≤0.08, under the same imaging surface and the same image height, the length of the lens can be effectively limited, which is conducive to miniaturization of the lens. More specifically, TTL, H and FOV can further satisfy 0.039≤TTL / H / FOV≤0.06, which is conducive to better miniaturization. TTL, H and FOV can further satisfy 0.0450≤TTL / H / FOV≤0.0531, which can further achieve miniaturization.

[0094] In an exemplary embodiment, the optical lens according to the present application may satisfy: 6≤TTL / F≤8.5, 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, and F is the effective focal length of the optical lens. Satisfying 6≤TTL / F≤8.5 can control the total optical length and focal length of the lens, which is conducive to miniaturization of the lens. More specifically, TTL and F can further satisfy 7≤TTL / F≤7.6, which is conducive to better miniaturization. TTL and F can further satisfy 7.1940≤TTL / F≤7.4137, which can further achieve miniaturization.

[0095] In an exemplary embodiment, the optical lens according to the present application may satisfy: 0.005≤D / H / FOV≤0.025, wherein D is the maximum effective aperture of the first side of the first lens corresponding to the maximum field of view of the optical lens, 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 0.005≤D / H / FOV≤0.025, the front port aperture, image height and field of view of the lens are controlled, and the small aperture and miniaturization of the lens can be achieved. More specifically, D, H and FOV may further satisfy 0.010≤D / H / FOV≤0.02, which is conducive to better achieving small aperture and miniaturization. D, H and FOV may further satisfy 0.0138≤D / H / FOV≤0.0183, which may further achieve small aperture and miniaturization.

[0096] In an exemplary embodiment, the optical lens according to the present application may satisfy: 0.2≤(F×θ) / D≤0.18, wherein F is the effective focal length of the optical lens, θ is the arc value corresponding to the maximum field angle of the optical lens, and D is the maximum effective aperture of the first side of the first lens corresponding to the maximum field angle of the optical lens. Satisfying 0.2≤(F×θ) / D≤0.18 and controlling the front port diameter, field angle and focal length of the lens can make the front port diameter of the lens smaller and reduce the size of the lens. More specifically, F, θ and D can further satisfy 0.3≤(F×θ) / D≤0.12, which is conducive to better realizing small aperture and miniaturization. F, θ and D can further satisfy 0.6311≤(F×θ) / D≤0.7684, which can further realize small aperture and miniaturization.

[0097] In an exemplary embodiment, the optical lens according to the present application may satisfy: 0.08≤D / H / F≤0.8, wherein D is the maximum effective aperture of the first side of the first lens corresponding to the maximum field of view of the optical lens, H is the image height corresponding to the maximum field of view of the optical lens, and F is the effective focal length of the optical lens. Satisfying 0.08≤D / H / F≤0.8, controlling the focal length of the entire lens, the aperture of the first side of the first lens, and the image height, can enable the lens to achieve the characteristics of long focal length, large target surface, and small aperture. More specifically, D, H, and F can further satisfy 0.12≤D / H / F≤0.6, which is conducive to better achieving the characteristics of long focal length, large target surface, and small aperture. D, H, and F can further satisfy 0.2793≤D / H / F≤0.3724, which can further achieve the characteristics of long focal length, large target surface, and small aperture.

[0098] In an exemplary embodiment, the optical lens according to the present application may satisfy: 0.15≤BFL / TTL≤0.285, wherein BFL is the distance from the center of the second side of the sixth 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 of the first lens to the imaging surface of the optical lens on the optical axis. Satisfying 0.15≤BFL / TTL≤0.285 ensures the back focal length on the basis of achieving miniaturization, meets the special requirements of the back focal length of the optical lens, is conducive to the assembly of the module, and reserves space for the installation and focusing of optical elements to avoid interference with the mechanism. More specifically, BFL and TTL may further satisfy 0.17≤BFL / TTL≤0.275, which is conducive to better realizing the characteristics of long back focal length. BFL and TTL may further satisfy 0.1975≤BFL / TTL≤0.2602, which may further realize the characteristics of long back focal length.

[0099] In an exemplary embodiment, the optical lens according to the present application may satisfy: 1≤F3 / F6≤2.5, wherein F3 is the effective focal length of the third lens, and F6 is the effective focal length of the sixth lens. Satisfying 1≤F3 / F6≤2.5, the third lens and the sixth lens are both positive focal powers, the focal length of the third lens is controlled to be larger, and the focal length of the sixth lens is smaller, so that the light moves smoothly in front of the system and is effectively converged in the rear, which is conducive to reducing the total optical length and achieving long back focus on the basis of miniaturization. More specifically, F3 and F6 may further satisfy 1.05≤F3 / F6≤1.8, which is conducive to better miniaturization and long back focus. F3 and F6 may further satisfy 1.1350≤F3 / F6≤1.5695, which may further achieve miniaturization and long back focus.

[0100] In an exemplary embodiment, the optical lens according to the present application may satisfy: 1.25≤F6 / F≤3.5, wherein F6 is the effective focal length of the sixth lens, and F is the effective focal length of the optical lens. The sixth lens has positive focal power, and the ratio of its focal length to the focal length of the entire system is controlled to satisfy 1.25≤F6 / F≤3.5, which can effectively compress the light so that the light is approximately vertically incident on the imaging surface, which is conducive to achieving a small CRA. The short focal length of the sixth lens is helpful for collecting light and ensuring the amount of light passing. More specifically, F6 and F can further satisfy 2.05≤F6 / F≤3.1, which is conducive to better achieving a small CRA. F6 and F can also further satisfy 2.3568≤F6 / F≤2.8270, which can further achieve a small CRA.

[0101] In an exemplary embodiment, the optical lens according to the present application may satisfy: 2.65≤F3 / F≤5, where F3 is the effective focal length of the third lens, and F is the effective focal length of the optical lens. Satisfying 2.65≤F3 / F≤5 ensures that the focal length of the third lens is large, does not cause abrupt deflection of light, helps smooth transition of light, and reduces system sensitivity. More specifically, F3 and F may further satisfy 2.7≤F3 / F≤4.6, which is conducive to better reducing system sensitivity. F3 and F may further satisfy 2.8814≤F3 / F≤4.4353, which may further reduce system sensitivity.

[0102] In an exemplary embodiment, the optical lens according to the present application may satisfy: 0.12≤d34 / TTL≤0.32, wherein d34 is the air gap between the third lens and the fourth 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 0.12≤d34 / TTL≤0.32 and enlarging the air gap between the third lens and the fourth lens on the basis of miniaturization is conducive to the light emitted from the third lens passing through a longer distance in a gentle trend, thereby reducing sensitivity. More specifically, d34 and TTL may further satisfy 0.125≤d34 / TTL≤0.29, which is conducive to better reducing the sensitivity of the system. d34 and TTL may further satisfy 0.1280≤d34 / TTL≤0.2255, which may further reduce the sensitivity of the system.

[0103] In an exemplary embodiment, the optical lens according to the present application may satisfy: -2.5≤F1 / F≤-1, wherein F1 is the effective focal length of the first lens, and F is the effective focal length of the optical lens. Satisfying -2.5≤F1 / F≤-1 and rationally allocating the focal length of the first lens is conducive to collecting light rays with a large field of view angle to enter the optical system, achieving large-angle imaging, and improving resolution. More specifically, F1 and F may further satisfy -2≤F1 / F≤-1.4, which is conducive to better achieving large-angle imaging and improving resolution. F1 and F may further satisfy -1.8738≤F1 / F≤-1.5233, which may further achieve large-angle imaging and improve resolution.

[0104] In an exemplary embodiment, the optical lens according to the present application may satisfy: 0.4≤F / H≤0.85, wherein F is the effective focal length of the optical lens, and H is the image height corresponding to the maximum field angle of the optical lens. Satisfying 0.4≤F / H≤0.85 and controlling the ratio of the focal length and image height of the optical lens within a certain range is conducive to improving the resolution. More specifically, F and H may further satisfy 0.5≤F / H≤0.7, which is conducive to better improving the resolution. F and H may further satisfy 0.5625≤F / H≤0.6759, which may further improve the resolution.

[0105] In an exemplary embodiment, the optical lens according to the present application may satisfy: 2.8≤|F2 / F|, where F is the effective focal length of the optical lens, and F2 is the effective focal length of the second lens. Satisfying 2.8≤|F2 / F| and reasonably allocating the focal length of the second lens can make the light transition smoothly in the optical system, while being conducive to collecting light, ensuring the amount of light passing, and helping to improve the resolution. It should be noted that the absolute value |F2| of the effective focal length of the second lens in multiple embodiments of the present application exceeds 200mm. The main function of the second lens is to smoothly transition the light. Through reasonable optical design, a second lens with a larger effective focal length of the present application can be obtained. In other words, |F2| can tend to infinity, that is, |F2 / F| can tend to infinity. More specifically, F2 and F can further satisfy 3.5≤|F2 / F|≤225, which is conducive to better improving the resolution. F2 and F can also further satisfy 4.5765≤|F2 / F|≤137.5919, which can further improve the resolution.

[0106] In an exemplary embodiment, the optical lens according to the present application may satisfy: 3≤F45 / F≤200, wherein F45 is the combined focal length of the fourth lens and the fifth lens, and F is the effective focal length of the optical lens. The fourth lens and the fifth lens form a cemented lens and satisfy 3≤F45 / F≤200. By controlling the combined focal length of the fourth lens and the fifth lens to be positive, the trend of light entering the cemented lens can be effectively controlled, and the aberration caused by the large-angle light entering through the first lens can be reduced, while helping to improve the resolution. More specifically, F45 and F can further satisfy 3.8≤F45 / F≤70, which is conducive to better improving the resolution. F45 and F can further satisfy 5.0228≤F45 / F≤46.0526, which can further improve the resolution.

[0107] In an exemplary embodiment, the optical lens according to the present application may satisfy: 0.85≤DST / F≤1.85, wherein DST is the effective aperture of the diaphragm, and F is the effective focal length of the optical lens. Satisfying 0.85≤DST / F≤1.85, so that the ratio of the aperture aperture to the effective focal length is larger, the larger the aperture of the lens, the greater the light throughput. More specifically, DST and F may further satisfy 1.1≤DST / F≤1.45, which is conducive to better achieving high light throughput. DST and F may further satisfy 1.1838≤DST / F≤1.3927, which may further achieve high light throughput.

[0108] In an exemplary embodiment, the optical lens according to the present application may satisfy: 1.45≤F / ENPD≤1.65, wherein F is the effective focal length of the optical lens, and ENPD is the entrance pupil diameter of the optical lens. Satisfying 1.45≤F / ENPD≤1.65, and controlling the focal length and entrance pupil diameter of the lens, a small FNO (aperture number) can be achieved, which is beneficial to increase the amount of light passed, increase the entrance pupil diameter, and improve relative illumination. More specifically, DST and F may further satisfy 1.5≤F / ENPD≤1.62, which is beneficial to better achieve high light throughput. DST and F may further satisfy 1.5600≤F / ENPD≤1.5600, which may further achieve high light throughput.

[0109] In an exemplary embodiment, the optical lens according to the present application may satisfy: 0.5≤(H / 2) / (F×tan(θ / 2))≤0.95, wherein H is the image height corresponding to the maximum field of view angle of the optical lens, F is the effective focal length of the optical lens, and θ is the radian value corresponding to the maximum field of view angle of the optical lens. Satisfying 0.5≤(H / 2) / (F×tan(θ / 2))≤0.95, the focal length and maximum field of view angle of the lens are controlled, which is conducive to achieving the characteristic of large central angular resolution. More specifically, H, F and θ may further satisfy 0.6≤(H / 2) / (F×tan(θ / 2))≤0.9, which is conducive to better achieving the characteristic of large central angular resolution. H, F and θ may further satisfy 0.7168≤(H / 2) / (F×tan(θ / 2))≤0.8615, which may further achieve the characteristic of large central angular resolution.

[0110] In an exemplary embodiment, the optical lens according to the present application may satisfy: 0.008≤arctan(SAG1 / (D / 2))≤0.5, wherein SAG1 is the sag corresponding to the first side surface of the first lens at the maximum field of view of the optical lens (i.e., the on-axis distance between the intersection of the first side surface of the first lens and the optical axis to the vertex of the effective radius of the first side surface of the first lens), and D is the maximum effective aperture of the first side surface of the first lens corresponding to the maximum field of view of the optical lens. Satisfying 0.008≤arctan(SAG1 / (D / 2))≤0.5, by controlling the sag and aperture of the first side surface of the first lens, so that the ratio of the sag and aperture is small, it is beneficial to collect and compress the light with a large field of view angle and improve the imaging quality of the central area. More specifically, SAG1 and D may further satisfy 0.008≤arctan(SAG1 / (D / 2))≤0.3, which is beneficial to better collect and compress the light with a large field of view angle and improve the imaging quality of the central area. SAG1 and D can further satisfy 0.0162≤arctan(SAG1 / (D / 2))≤0.1973, which can further collect and compress light with a large field of view angle and improve the imaging quality in the central area.

[0111] In an exemplary embodiment, the optical lens according to the present application may satisfy: 2.2≤R1 / R2≤100, wherein R1 is the central curvature radius of the first side of the first lens, and R2 is the central curvature radius of the second side of the first lens. By satisfying 2.2≤R1 / R2≤100, by controlling the central curvature radius of the first side and the second side of the first lens, the large-angle peripheral light entering through the first lens can be quickly focused, the imaging quality can be improved, and a large central angular resolution can be achieved. More specifically, R1 and R2 may further satisfy 2.5≤R1 / R2≤52, which is conducive to better achieving the characteristic of a large central angular resolution. R1 and R2 may further satisfy 2.8346≤R1 / R2≤33.4638, which may further achieve the characteristic of a large central angular resolution.

[0112] In an exemplary embodiment, the optical lens according to the present application may satisfy: 0.04≤(d8+d9) / TTL≤0.28, wherein d8 is the center thickness of the fourth lens on the optical axis, d9 is the center thickness of the fifth 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 0.04≤(d8+d9) / TTL≤0.28 and reasonably increasing the center thickness of the cemented lens composed of the fourth lens and the fifth lens is conducive to enhancing the ability to control light and improving relative illumination. More specifically, d8, d9 and TTL may further satisfy 0.07≤(d8+d9) / TTL≤0.22, which is conducive to better improving relative illumination. d8, d9 and TTL may further satisfy 0.0920≤(d8+d9) / TTL≤0.1803, which may further improve relative illumination.

[0113] In an exemplary embodiment, the optical lens according to the present application may satisfy: 1.25≤R5 / F≤8, wherein R5 is the central curvature radius of the first side of the third lens, and F is the effective focal length of the optical lens. Satisfying 1.25≤R5 / F≤8, the first side of the third lens is convex, and its radius of curvature is controlled to be small, which is conducive to shrinking the front light, so that the height of the light entering the rear lens is reduced, and the front port diameter is reduced, which is conducive to achieving small diameter and miniaturization. More specifically, R5 and F can further satisfy 1.45≤R5 / F≤7.2, which is conducive to better achieving small diameter and miniaturization. R5 and F can also further satisfy 1.6538≤R5 / F≤5.2622, which can further achieve small diameter and miniaturization.

[0114] In an exemplary embodiment, the optical lens according to the present application may satisfy: -1.5≤R2 / R3≤-0.015, wherein R2 is the radius of curvature of the second side of the first lens, and R3 is the central radius of curvature of the first side of the second lens. Satisfying -1.5≤R2 / R3≤-0.015, the second side of the first lens and the first side of the second lens are two concave surfaces arranged opposite to each other, and controlling the radius of curvature of these two surfaces is conducive to passing through the divergent central light twice, so that there is an optical path difference between the peripheral light and the central light, and enters the rear optical system, that is, the central light can be diverged and expanded at a small aperture, reducing the front port diameter of the lens and reducing the volume, which is conducive to achieving a small aperture. More specifically, R2 and R3 may further satisfy -0.8≤R2 / R3≤-0.024, which is conducive to better achieving a small aperture. R2 and R3 may further satisfy -0.5025≤R2 / R3≤-0.0371, which may further achieve a small aperture.

[0115] In an exemplary embodiment, the optical lens according to the present application may satisfy: 1.0≤R11 / F≤5, wherein R11 is the central curvature radius of the first side of the sixth lens, and F is the effective focal length of the optical lens. Satisfying 1.0≤R11 / F≤5, the first side of the sixth lens is convex, and its radius of curvature is controlled to be small, which is conducive to shrinking the front light, reducing the height of the light entering the sixth lens, and achieving a small aperture; at the same time, it effectively lowers the light, which is conducive to achieving a small CRA. More specifically, R11 and F may further satisfy 1.2≤R11 / F≤4.1, which is conducive to better achieving a small aperture and a small CRA. R11 and F may further satisfy 1.7972≤R11 / F≤3.5797, which may further achieve a small aperture and a small CRA.

[0116] 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 sixth lens and the imaging surface, the filter may filter light with different wavelengths, and the protective glass may prevent the elements (e.g., chip) on the second side of the optical lens from being damaged.

[0117] In an exemplary embodiment, the first lens to the sixth lens may be a spherical lens or an aspherical lens. 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. Exemplarily, the sixth lens of the present application is an aspherical lens. The characteristics of an aspherical lens are: 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 setting of an aspherical lens helps to correct system aberrations and improve resolution.

[0118] In an exemplary embodiment, the first to sixth lenses may be glass lenses or plastic lenses. The present application does not specifically limit the specific number of glass lenses and plastic lenses. An optical lens made of glass can suppress the deviation of the back focus of the optical lens 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. Specifically, when focusing on temperature performance, the first to sixth lenses can all be made of glass. In applications where temperature stability requirements are lower, the first to sixth lenses in the optical lens can also be made of plastic. Making optical lenses with plastic can effectively reduce production costs. Of course, the first to sixth lenses in the optical lens can also be made of a combination of plastic and glass.

[0119] According to the above-mentioned embodiment of the present application, the optical lens can have at least one beneficial effect of miniaturization, small aperture, back focal length, small CRA, high light flux, high resolution and large central angle resolution through the reasonable setting of parameters such as lens shape and optical focal length.

[0120] However, it should be understood by those skilled in the art 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 six lenses are described as an example in the embodiment, the optical lens is not limited to including six lenses. If necessary, the optical lens may also include other numbers of lenses. The 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 Embodiment 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, a fifth lens L5 and a sixth lens L6 in sequence from the first side to the second side along the optical axis.

[0123] The first lens L1 is a convex-concave lens with negative focal power, whose first side surface S1 is convex and whose second side surface S2 is concave. The second lens L2 is a convex-concave lens with positive focal power, whose first side surface S3 is concave and whose second side surface S4 is convex. The third lens L3 is a convex-convex lens with positive focal power, whose first side surface S5 is convex and whose second side surface S6 is convex. The fourth lens L4 is a convex-concave lens with negative focal power, whose first side surface S8 is concave and whose second side surface S9 is concave. The fifth lens L5 is a convex-convex lens with positive focal power, whose first side surface S9 is convex and whose second side surface S10 is convex. The sixth lens L6 is a convex-convex lens with positive focal power, whose first side surface S11 is convex and whose second side surface S12 is convex. Among them, the fourth lens L4 and the fifth lens L5 are cemented to form a double cemented lens.

[0124] The optical lens may further include a stop STO. The stop STO may be disposed between the third lens L3 and the fourth lens L4. For example, the stop STO may be disposed near the first side surface S8 of the fourth lens L4.

[0125] Optionally, the optical lens may further include a filter having a first side surface S13 and a second side surface S14 and / or a protective glass having a first side surface S15 and a second side surface S16.

[0126] The optical lens provided in this application can be used as, for example, a vehicle-mounted lens or a laser radar receiving end lens. In this case, Figure 1 IMA may represent an imaging surface, for example, and light from an object sequentially passes through each surface S1 to S16 and is finally imaged on the imaging surface disposed on the second side, wherein an image sensor chip is disposed on the imaging surface. It should be understood that the optical lens provided in the present application may also be used as, for example, a projection lens or a laser radar transmitting end lens. In this case, Figure 1 IMA may represent a light source surface, for example. Light from the light source surface sequentially passes through the surfaces S16 to S1 and is finally projected to the first side, for example, to form an image or illuminate an area on the first side.

[0127] Table 1 shows the radius of curvature R, thickness / distance (it should be understood that the thickness / distance of the row where S1 is located is the center thickness of the first lens L1, the thickness / distance of the row where S2 is located is the spacing distance between the second side surface S2 of the first lens L1 and the first side surface S3 of the second lens L2, the thickness / distance of the row where S3 is located is the center thickness of the second lens L2, and so on), refractive index Nd, and Abbe number Vd of each lens of the optical lens of Example 1.

[0128] Table 1

[0129]

[0130] In Embodiment 1, the first side surface S1 and the second side surface S2 of the first lens L1 may be aspherical surfaces, and the surface shape of each aspherical lens may be defined by, but not limited to, the following aspherical surface formula:

[0131] (1)

[0132] Wherein, x is the distance vector height from the vertex of the aspherical surface when the aspherical surface is at a height of h along the optical axis; c is the paraxial curvature of the aspherical surface, c=1 / R (i.e., the paraxial curvature c is the reciprocal of the curvature radius R in Table 1 above); k is the cone coefficient; Ai is the correction coefficient of the i-th order of the aspherical surface. Table 2 below gives the cone coefficient k and the high-order coefficients A4, A6, A8, A10, A12, A14 and A16 that can be used for each aspherical mirror surface S1 and S2 in Example 1.

[0133] Table 2

[0134]

[0135] Figure 2 The distortion curve of the optical lens of Example 1 is shown, which indicates the distortion magnitude values ​​corresponding to different field angles. Figure 2 It can be seen that the optical lens of Example 1 achieves the characteristic of large central angular resolution by imaging distortion of part of the edge field of view. Example 2

[0136] The following reference Figure 3 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. Figure 3 A schematic structural diagram of an optical lens according to Example 2 of the present application is shown.

[0137] like Figure 3 As shown, the optical lens includes a first lens L1, a second lens L2, a third lens L3, a fourth lens L4, a fifth lens L5 and a sixth lens L6 in sequence from the first side to the second side along the optical axis.

[0138] The first lens L1 is a convex-concave lens with negative focal power, whose first side surface S1 is convex and whose second side surface S2 is concave. The second lens L2 is a convex-concave lens with positive focal power, whose first side surface S3 is concave and whose second side surface S4 is convex. The third lens L3 is a convex-convex lens with positive focal power, whose first side surface S5 is convex and whose second side surface S6 is convex. The fourth lens L4 is a convex-concave lens with negative focal power, whose first side surface S8 is concave and whose second side surface S9 is concave. The fifth lens L5 is a convex-convex lens with positive focal power, whose first side surface S9 is convex and whose second side surface S10 is convex. The sixth lens L6 is a convex-convex lens with positive focal power, whose first side surface S11 is convex and whose second side surface S12 is convex. Among them, the fourth lens L4 and the fifth lens L5 are cemented to form a double cemented lens.

[0139] The optical lens may further include a stop STO. The stop STO may be disposed between the third lens L3 and the fourth lens L4. For example, the stop STO may be disposed near the first side surface S8 of the fourth lens L4.

[0140] Optionally, the optical lens may further include a filter having a first side surface S13 and a second side surface S14 and / or a protective glass having a first side surface S15 and a second side surface S16.

[0141] The optical lens provided in this application can be used as, for example, a vehicle-mounted lens or a laser radar receiving end lens. In this case, Figure 3 IMA may represent an imaging surface, for example, and light from an object sequentially passes through each surface S1 to S16 and is finally imaged on the imaging surface disposed on the second side, wherein an image sensor chip is disposed on the imaging surface. It should be understood that the optical lens provided in the present application may also be used as, for example, a projection lens or a laser radar transmitting end lens. In this case, Figure 3 IMA may represent a light source surface, for example. Light from the light source surface sequentially passes through the surfaces S16 to S1 and is finally projected to the first side, for example, to form an image or illuminate an area on the first side.

[0142] Table 3 shows the radius of curvature R, thickness / distance, refractive index Nd and Abbe number Vd of each lens of the optical lens of Example 2. Table 4 shows the conic coefficient and high-order coefficient of each aspheric mirror surface that can be used in Example 2, wherein each aspheric surface shape can be defined by the formula (1) given in the above Example 1.

[0143] Table 3

[0144]

[0145] Table 4

[0146]

[0147] Figure 4The distortion curve of the optical lens of Example 2 is shown, which indicates the distortion value corresponding to different field angles. Figure 4 It can be seen that the optical lens of Example 2 achieves the characteristic of large central angular resolution by imaging distortion of part of the edge field of view.

[0148] Figure 5 The modulation transfer function (MTF) curves of the optical lenses of Examples 1 and 2 of the present application are shown in FIG. 1 , wherein the horizontal axis is the spatial frequency, the unit of the spatial frequency is line pairs per millimeter (lp / mm), and the vertical axis is the optical modulation function value (i.e., the MTF value). It should be noted that, for the optical lenses shown in Examples 1 and 2 of the present application, when the spatial frequency is 65lp / mm, the MTF peak value of the central field of view can reach above 0.75, and high resolution can be achieved. Example 3

[0149] The following reference Figure 6 An optical lens according to Example 3 of the present application is described. Figure 6 A schematic structural diagram of an optical lens according to Example 3 of the present application is shown.

[0150] like Figure 6 As shown, the optical lens includes a first lens L1, a second lens L2, a third lens L3, a fourth lens L4, a fifth lens L5 and a sixth lens L6 in sequence from the first side to the second side along the optical axis.

[0151] The first lens L1 is a convex-concave lens with negative focal power, whose first side surface S1 is convex and whose second side surface S2 is concave. The second lens L2 is a convex-concave lens with positive focal power, whose first side surface S3 is concave and whose second side surface S4 is convex. The third lens L3 is a convex-concave lens with positive focal power, whose first side surface S5 is convex and whose second side surface S6 is concave. The fourth lens L4 is a convex-convex lens with positive focal power, whose first side surface S8 is convex and whose second side surface S9 is convex. The fifth lens L5 is a convex-convex lens with negative focal power, whose first side surface S9 is concave and whose second side surface S10 is convex. The sixth lens L6 is a convex-convex lens with positive focal power, whose first side surface S11 is convex and whose second side surface S12 is convex. Among them, the fourth lens L4 and the fifth lens L5 are cemented to form a double cemented lens.

[0152] The optical lens may further include a stop STO. The stop STO may be disposed between the third lens L3 and the fourth lens L4. For example, the stop STO may be disposed near the first side surface S8 of the fourth lens L4.

[0153] Optionally, the optical lens may further include a filter having a first side surface S13 and a second side surface S14 and / or a protective glass having a first side surface S15 and a second side surface S16.

[0154] The optical lens provided in this application can be used as, for example, a vehicle-mounted lens or a laser radar receiving end lens. In this case, Figure 6 IMA may represent an imaging surface, for example, and light from an object sequentially passes through each surface S1 to S16 and is finally imaged on the imaging surface disposed on the second side, wherein an image sensor chip is disposed on the imaging surface. It should be understood that the optical lens provided in the present application may also be used as, for example, a projection lens or a laser radar transmitting end lens. In this case, Figure 6 IMA may represent a light source surface, for example. Light from the light source surface sequentially passes through the surfaces S16 to S1 and is finally projected to the first side, for example, to form an image or illuminate an area on the first side.

[0155] Table 5 shows the radius of curvature R, thickness / distance, refractive index Nd and Abbe number Vd of each lens of the optical lens of Example 3. Table 6 shows the conic coefficient and high-order coefficient of each aspheric mirror surface that can be used in Example 3, wherein each aspheric surface shape can be defined by the formula (1) given in the above Example 1.

[0156] Table 5

[0157]

[0158] Table 6

[0159]

[0160] Figure 7 The distortion curve of the optical lens of Example 3 is shown, which indicates the distortion magnitude values ​​corresponding to different field angles. Figure 7 It can be seen that the optical lens of Example 3 achieves the characteristic of large central angular resolution by imaging distortion of part of the edge field of view. Example 4

[0161] The following reference Figure 8 An optical lens according to Example 4 of the present application is described. Figure 8 A schematic structural diagram of an optical lens according to Example 4 of the present application is shown.

[0162] like Figure 8 As shown, the optical lens includes a first lens L1, a second lens L2, a third lens L3, a fourth lens L4, a fifth lens L5 and a sixth lens L6 in sequence from the first side to the second side along the optical axis.

[0163] The first lens L1 is a convex-concave lens with negative focal power, whose first side surface S1 is convex and whose second side surface S2 is concave. The second lens L2 is a convex-concave lens with positive focal power, whose first side surface S3 is concave and whose second side surface S4 is convex. The third lens L3 is a convex-concave lens with positive focal power, whose first side surface S5 is convex and whose second side surface S6 is concave. The fourth lens L4 is a convex-convex lens with positive focal power, whose first side surface S8 is convex and whose second side surface S9 is convex. The fifth lens L5 is a convex-convex lens with negative focal power, whose first side surface S9 is concave and whose second side surface S10 is convex. The sixth lens L6 is a convex-convex lens with positive focal power, whose first side surface S11 is convex and whose second side surface S12 is convex. Among them, the fourth lens L4 and the fifth lens L5 are cemented to form a double cemented lens.

[0164] The optical lens may further include a stop STO. The stop STO may be disposed between the third lens L3 and the fourth lens L4. For example, the stop STO may be disposed near the first side surface S8 of the fourth lens L4.

[0165] Optionally, the optical lens may further include a filter having a first side surface S13 and a second side surface S14 and / or a protective glass having a first side surface S15 and a second side surface S16.

[0166] The optical lens provided in this application can be used as, for example, a vehicle-mounted lens or a laser radar receiving end lens. In this case, Figure 8 IMA may represent an imaging surface, for example, and light from an object sequentially passes through each surface S1 to S16 and is finally imaged on the imaging surface disposed on the second side, wherein an image sensor chip is disposed on the imaging surface. It should be understood that the optical lens provided in the present application may also be used as, for example, a projection lens or a laser radar transmitting end lens. In this case, Figure 8 IMA may represent a light source surface, for example. Light from the light source surface sequentially passes through the surfaces S16 to S1 and is finally projected to the first side, for example, to form an image or illuminate an area on the first side.

[0167] Table 7 shows the radius of curvature R, thickness / distance, refractive index Nd and Abbe number Vd of each lens of the optical lens of Example 4. Table 8 shows the conic coefficient and high-order coefficient of each aspheric mirror surface that can be used in Example 4, wherein each aspheric surface shape can be defined by the formula (1) given in the above Example 1.

[0168] Table 7

[0169]

[0170] Table 8

[0171]

[0172] Fig. 9The distortion curve of the optical lens of Example 3 is shown, which indicates the distortion magnitude values ​​corresponding to different field angles. Fig. 9 It can be seen that the optical lens of Example 3 achieves the characteristic of large central angular resolution by imaging distortion of part of the edge field of view.

[0173] The optical lenses shown in Examples 3 and 4 can achieve an MTF peak value of more than 0.72 in the central field of view when the spatial frequency is 65 lp / mm, thus achieving high resolution. Example 5

[0174] The following reference Fig.10 An optical lens according to Example 5 of the present application is described. Fig.10 A schematic structural diagram of an optical lens according to Example 5 of the present application is shown.

[0175] like Fig.10 As shown, the optical lens includes a first lens L1, a second lens L2, a third lens L3, a fourth lens L4, a fifth lens L5 and a sixth lens L6 in sequence from the first side to the second side along the optical axis.

[0176] The first lens L1 is a convex-concave lens with negative focal power, whose first side surface S1 is convex and whose second side surface S2 is concave. The second lens L2 is a convex-concave lens with positive focal power, whose first side surface S3 is concave and whose second side surface S4 is convex. The third lens L3 is a convex-convex lens with positive focal power, whose first side surface S5 is convex and whose second side surface S6 is convex. The fourth lens L4 is a convex-concave lens with negative focal power, whose first side surface S8 is concave and whose second side surface S9 is concave. The fifth lens L5 is a convex-convex lens with positive focal power, whose first side surface S9 is convex and whose second side surface S10 is convex. The sixth lens L6 is a convex-convex lens with positive focal power, whose first side surface S11 is convex and whose second side surface S12 is convex. Among them, the fourth lens L4 and the fifth lens L5 are cemented to form a double cemented lens.

[0177] The optical lens may further include a stop STO. The stop STO may be disposed between the third lens L3 and the fourth lens L4. For example, the stop STO may be disposed near the first side surface S8 of the fourth lens L4.

[0178] Optionally, the optical lens may further include a filter having a first side surface S13 and a second side surface S14 and / or a protective glass having a first side surface S15 and a second side surface S16.

[0179] The optical lens provided in this application can be used as, for example, a vehicle-mounted lens or a laser radar receiving end lens. In this case, Fig.10IMA may represent an imaging surface, for example, and light from an object sequentially passes through each surface S1 to S16 and is finally imaged on the imaging surface disposed on the second side, wherein an image sensor chip is disposed on the imaging surface. It should be understood that the optical lens provided in the present application may also be used as, for example, a projection lens or a laser radar transmitting end lens. In this case, Fig.10 IMA may represent a light source surface, for example. Light from the light source surface sequentially passes through the surfaces S16 to S1 and is finally projected to the first side, for example, to form an image or illuminate an area on the first side.

[0180] Table 9 shows the curvature radius R, thickness / distance, refractive index Nd, and Abbe number Vd of each lens of the optical lens of Example 5. Each lens of the optical lens of Example 5 is a spherical lens.

[0181] Table 9

[0182]

[0183] Fig.11 The distortion curve of the optical lens of Example 5 is shown, which indicates the distortion magnitude values ​​corresponding to different field angles. Fig.11 It can be seen that the optical lens of Example 5 achieves the characteristic of large central angular resolution by imaging distortion of part of the edge field of view. Example 6

[0184] The following reference Fig.12 An optical lens according to Example 6 of the present application is described. Fig.12 A schematic structural diagram of an optical lens according to Example 6 of the present application is shown.

[0185] like Fig.12 As shown, the optical lens includes a first lens L1, a second lens L2, a third lens L3, a fourth lens L4, a fifth lens L5 and a sixth lens L6 in sequence from the first side to the second side along the optical axis.

[0186] The first lens L1 is a convex-concave lens with negative focal power, whose first side surface S1 is convex and whose second side surface S2 is concave. The second lens L2 is a convex-concave lens with positive focal power, whose first side surface S3 is concave and whose second side surface S4 is convex. The third lens L3 is a convex-convex lens with positive focal power, whose first side surface S5 is convex and whose second side surface S6 is convex. The fourth lens L4 is a convex-concave lens with negative focal power, whose first side surface S8 is concave and whose second side surface S9 is concave. The fifth lens L5 is a convex-convex lens with positive focal power, whose first side surface S9 is convex and whose second side surface S10 is convex. The sixth lens L6 is a convex-convex lens with positive focal power, whose first side surface S11 is convex and whose second side surface S12 is convex. Among them, the fourth lens L4 and the fifth lens L5 are cemented to form a double cemented lens.

[0187] The optical lens may further include a stop STO. The stop STO may be disposed between the third lens L3 and the fourth lens L4. For example, the stop STO may be disposed near the first side surface S8 of the fourth lens L4.

[0188] Optionally, the optical lens may further include a filter having a first side surface S13 and a second side surface S14 and / or a protective glass having a first side surface S15 and a second side surface S16.

[0189] The optical lens provided in this application can be used as, for example, a vehicle-mounted lens or a laser radar receiving end lens. In this case, Fig.12 IMA may represent an imaging surface, for example, and light from an object sequentially passes through each surface S1 to S16 and is finally imaged on the imaging surface disposed on the second side, wherein an image sensor chip is disposed on the imaging surface. It should be understood that the optical lens provided in the present application may also be used as, for example, a projection lens or a laser radar transmitting end lens. In this case, Fig.12 IMA may represent a light source surface, for example. Light from the light source surface sequentially passes through the surfaces S16 to S1 and is finally projected to the first side, for example, to form an image or illuminate an area on the first side.

[0190] Table 10 shows the curvature radius R, thickness / distance, refractive index Nd, and Abbe number Vd of each lens of the optical lens of Example 6. Each lens of the optical lens of Example 6 is a spherical lens.

[0191] Table 10

[0192]

[0193] Fig.13 The distortion curve of the optical lens of Example 6 is shown, which indicates the distortion magnitude values ​​corresponding to different field angles. Fig.13 It can be seen that the optical lens of Example 6 achieves the characteristic of large central angular resolution by imaging distortion of part of the edge field of view. Example 7

[0194] The following reference Fig.14 An optical lens according to Example 7 of the present application is described. Fig.14 A schematic structural diagram of an optical lens according to Example 7 of the present application is shown.

[0195] like Fig.14 As shown, the optical lens includes a first lens L1, a second lens L2, a third lens L3, a fourth lens L4, a fifth lens L5 and a sixth lens L6 in sequence from the first side to the second side along the optical axis.

[0196] The first lens L1 is a convex-concave lens with negative focal power, whose first side surface S1 is convex and whose second side surface S2 is concave. The second lens L2 is a convex-concave lens with positive focal power, whose first side surface S3 is concave and whose second side surface S4 is convex. The third lens L3 is a convex-convex lens with positive focal power, whose first side surface S5 is convex and whose second side surface S6 is convex. The fourth lens L4 is a convex-concave lens with negative focal power, whose first side surface S8 is concave and whose second side surface S9 is concave. The fifth lens L5 is a convex-convex lens with positive focal power, whose first side surface S9 is convex and whose second side surface S10 is convex. The sixth lens L6 is a convex-concave lens with positive focal power, whose first side surface S11 is convex and whose second side surface S12 is concave. Among them, the fourth lens L4 and the fifth lens L5 are cemented to form a double cemented lens.

[0197] The optical lens may further include a stop STO. The stop STO may be disposed between the third lens L3 and the fourth lens L4. For example, the stop STO may be disposed near the first side surface S8 of the fourth lens L4.

[0198] Optionally, the optical lens may further include a filter having a first side surface S13 and a second side surface S14 and / or a protective glass having a first side surface S15 and a second side surface S16.

[0199] The optical lens provided in this application can be used as, for example, a vehicle-mounted lens or a laser radar receiving end lens. In this case, Fig.14 IMA may represent an imaging surface, for example, and light from an object sequentially passes through each surface S1 to S16 and is finally imaged on the imaging surface disposed on the second side, wherein an image sensor chip is disposed on the imaging surface. It should be understood that the optical lens provided in the present application may also be used as, for example, a projection lens or a laser radar transmitting end lens. In this case, Fig.14 IMA may represent a light source surface, for example. Light from the light source surface sequentially passes through the surfaces S16 to S1 and is finally projected to the first side, for example, to form an image or illuminate an area on the first side.

[0200] Table 11 shows the radius of curvature R, thickness / distance, refractive index Nd and Abbe number Vd of each lens of the optical lens of Example 7. Table 12 shows the conic coefficient and high-order coefficient of each aspheric mirror surface that can be used in Example 7, wherein each aspheric surface shape can be defined by the formula (1) given in the above Example 1.

[0201] Table 11

[0202]

[0203] Table 12

[0204]

[0205] Fig.15 The distortion curve of the optical lens of Example 7 is shown, which indicates the distortion value corresponding to different field angles. Fig.15 It can be seen that the optical lens of Example 7 achieves the characteristic of large central angular resolution by imaging distortion of part of the edge field of view. Example 8

[0206] The following reference Fig.16 An optical lens according to Example 8 of the present application is described. Fig.16 A schematic structural diagram of an optical lens according to Example 8 of the present application is shown.

[0207] like Fig.16 As shown, the optical lens includes a first lens L1, a second lens L2, a third lens L3, a fourth lens L4, a fifth lens L5 and a sixth lens L6 in sequence from the first side to the second side along the optical axis.

[0208] The first lens L1 is a convex-concave lens with negative focal power, whose first side surface S1 is convex and whose second side surface S2 is concave. The second lens L2 is a convex-concave lens with positive focal power, whose first side surface S3 is concave and whose second side surface S4 is convex. The third lens L3 is a convex-convex lens with positive focal power, whose first side surface S5 is convex and whose second side surface S6 is convex. The fourth lens L4 is a convex-concave lens with negative focal power, whose first side surface S8 is concave and whose second side surface S9 is concave. The fifth lens L5 is a convex-convex lens with positive focal power, whose first side surface S9 is convex and whose second side surface S10 is convex. The sixth lens L6 is a convex-concave lens with positive focal power, whose first side surface S11 is convex and whose second side surface S12 is concave. Among them, the fourth lens L4 and the fifth lens L5 are cemented to form a double cemented lens.

[0209] The optical lens may further include a stop STO. The stop STO may be disposed between the third lens L3 and the fourth lens L4. For example, the stop STO may be disposed near the first side surface S8 of the fourth lens L4.

[0210] Optionally, the optical lens may further include a filter having a first side surface S13 and a second side surface S14 and / or a protective glass having a first side surface S15 and a second side surface S16.

[0211] The optical lens provided in this application can be used as, for example, a vehicle-mounted lens or a laser radar receiving end lens. In this case, Fig.16 IMA may represent an imaging surface, for example, and light from an object sequentially passes through each surface S1 to S16 and is finally imaged on the imaging surface disposed on the second side, wherein an image sensor chip is disposed on the imaging surface. It should be understood that the optical lens provided in the present application may also be used as, for example, a projection lens or a laser radar transmitting end lens. In this case, Fig.16IMA may represent a light source surface, for example. Light from the light source surface sequentially passes through the surfaces S16 to S1 and is finally projected to the first side, for example, to form an image or illuminate an area on the first side.

[0212] Table 13 shows the radius of curvature R, thickness / distance, refractive index Nd and Abbe number Vd of each lens of the optical lens of Example 8. Table 14 shows the conic coefficient and high-order coefficient of each aspheric mirror surface that can be used in Example 8, wherein each aspheric surface shape can be defined by the formula (1) given in the above Example 1.

[0213] Table 13

[0214]

[0215] Table 14

[0216]

[0217] Fig.17 The distortion curve of the optical lens of Example 8 is shown, which indicates the distortion value corresponding to different field angles. Fig.17 It can be seen that the optical lens of Example 8 achieves the characteristic of large central angular resolution by imaging distortion of part of the edge field of view.

[0218] The optical lenses shown in Examples 7 and 8 can achieve an MTF peak value of more than 0.8 in the central field of view when the spatial frequency is 65 lp / mm, thereby achieving high resolution. Example 9

[0219] The following reference Fig.18 An optical lens according to Example 9 of the present application is described. Fig.18 A schematic structural diagram of an optical lens according to Example 9 of the present application is shown.

[0220] like Fig.18 As shown, the optical lens includes a first lens L1, a second lens L2, a third lens L3, a fourth lens L4, a fifth lens L5 and a sixth lens L6 in sequence from the first side to the second side along the optical axis.

[0221] The first lens L1 is a convex-concave lens with negative focal power, whose first side surface S1 is convex and whose second side surface S2 is concave. The second lens L2 is a convex-concave lens with positive focal power, whose first side surface S3 is concave and whose second side surface S4 is convex. The third lens L3 is a convex-concave lens with positive focal power, whose first side surface S5 is convex and whose second side surface S6 is concave. The fourth lens L4 is a convex-concave lens with negative focal power, whose first side surface S8 is concave and whose second side surface S9 is concave. The fifth lens L5 is a convex-convex lens with positive focal power, whose first side surface S9 is convex and whose second side surface S10 is convex. The sixth lens L6 is a convex-convex lens with positive focal power, whose first side surface S11 is convex and whose second side surface S12 is convex. Among them, the fourth lens L4 and the fifth lens L5 are cemented to form a double cemented lens.

[0222] The optical lens may further include a stop STO. The stop STO may be disposed between the third lens L3 and the fourth lens L4. For example, the stop STO may be disposed near the first side surface S8 of the fourth lens L4.

[0223] Optionally, the optical lens may further include a filter having a first side surface S13 and a second side surface S14 and / or a protective glass having a first side surface S15 and a second side surface S16.

[0224] The optical lens provided in this application can be used as, for example, a vehicle-mounted lens or a laser radar receiving end lens. In this case, Fig.18 IMA may represent an imaging surface, for example, and light from an object sequentially passes through each surface S1 to S16 and is finally imaged on the imaging surface disposed on the second side, wherein an image sensor chip is disposed on the imaging surface. It should be understood that the optical lens provided in the present application may also be used as, for example, a projection lens or a laser radar transmitting end lens. In this case, Fig.18 IMA may represent a light source surface, for example. Light from the light source surface sequentially passes through the surfaces S16 to S1 and is finally projected to the first side, for example, to form an image or illuminate an area on the first side.

[0225] Table 15 shows the radius of curvature R, thickness / distance, refractive index Nd and Abbe number Vd of each lens of the optical lens of Example 9. Table 16 shows the conic coefficient and high-order coefficient of each aspheric mirror surface that can be used in Example 9, wherein each aspheric surface shape can be defined by the formula (1) given in the above Example 1.

[0226] Table 15

[0227]

[0228] Table 16

[0229]

[0230] Fig.19 The distortion curve of the optical lens of Example 9 is shown, which indicates the distortion magnitude values ​​corresponding to different field angles. Fig.19 It can be seen that the optical lens of Example 9 achieves the characteristic of large central angular resolution by imaging distortion of part of the edge field of view. Example 10

[0231] The following reference Fig. 20 An optical lens according to Example 10 of the present application is described. Fig. 20 A schematic structural diagram of an optical lens according to Example 10 of the present application is shown.

[0232] like Fig. 20 As shown, the optical lens includes a first lens L1, a second lens L2, a third lens L3, a fourth lens L4, a fifth lens L5 and a sixth lens L6 in sequence from the first side to the second side along the optical axis.

[0233] The first lens L1 is a convex-concave lens with negative focal power, whose first side surface S1 is convex and whose second side surface S2 is concave. The second lens L2 is a convex-concave lens with positive focal power, whose first side surface S3 is concave and whose second side surface S4 is convex. The third lens L3 is a convex-concave lens with positive focal power, whose first side surface S5 is convex and whose second side surface S6 is concave. The fourth lens L4 is a convex-concave lens with negative focal power, whose first side surface S8 is concave and whose second side surface S9 is concave. The fifth lens L5 is a convex-convex lens with positive focal power, whose first side surface S9 is convex and whose second side surface S10 is convex. The sixth lens L6 is a convex-convex lens with positive focal power, whose first side surface S11 is convex and whose second side surface S12 is convex. Among them, the fourth lens L4 and the fifth lens L5 are cemented to form a double cemented lens.

[0234] The optical lens may further include a stop STO. The stop STO may be disposed between the third lens L3 and the fourth lens L4. For example, the stop STO may be disposed near the first side surface S8 of the fourth lens L4.

[0235] Optionally, the optical lens may further include a filter having a first side surface S13 and a second side surface S14 and / or a protective glass having a first side surface S15 and a second side surface S16.

[0236] The optical lens provided in this application can be used as, for example, a vehicle-mounted lens or a laser radar receiving end lens. In this case, Fig. 20 IMA may represent an imaging surface, for example, and light from an object sequentially passes through each surface S1 to S16 and is finally imaged on the imaging surface disposed on the second side, wherein an image sensor chip is disposed on the imaging surface. It should be understood that the optical lens provided in the present application may also be used as, for example, a projection lens or a laser radar transmitting end lens. In this case, Fig. 20IMA may represent a light source surface, for example. Light from the light source surface sequentially passes through the surfaces S16 to S1 and is finally projected to the first side, for example, to form an image or illuminate an area on the first side.

[0237] Table 17 shows the radius of curvature R, thickness / distance, refractive index Nd and Abbe number Vd of each lens of the optical lens of Example 10. Table 18 shows the conic coefficient and high-order coefficient of each aspheric mirror surface that can be used in Example 10, wherein each aspheric surface shape can be defined by the formula (1) given in the above Example 1.

[0238] Table 17

[0239]

[0240] Table 18

[0241]

[0242] Fig.21 The distortion curve of the optical lens of Example 10 is shown, which indicates the distortion magnitude values ​​corresponding to different field angles. Fig.21 It can be seen that the optical lens of Example 10 achieves the characteristic of large central angular resolution by imaging distortion of part of the edge field of view.

[0243] The optical lenses shown in Examples 9 and 10 can achieve an MTF peak value of more than 0.77 in the central field of view when the spatial frequency is 65 lp / mm, thereby achieving high resolution. Embodiment 11

[0244] The following reference Fig. 22 An optical lens according to Example 11 of the present application is described. Fig. 22 A schematic structural diagram of an optical lens according to Example 11 of the present application is shown.

[0245] like Fig. 22 As shown, the optical lens includes a first lens L1, a second lens L2, a third lens L3, a fourth lens L4, a fifth lens L5 and a sixth lens L6 in sequence from the first side to the second side along the optical axis.

[0246] The first lens L1 is a convex-concave lens with negative focal power, whose first side surface S1 is convex and whose second side surface S2 is concave. The second lens L2 is a convex-concave lens with negative focal power, whose first side surface S3 is concave and whose second side surface S4 is concave. The third lens L3 is a convex-concave lens with positive focal power, whose first side surface S5 is convex and whose second side surface S6 is concave. The fourth lens L4 is a convex-concave lens with negative focal power, whose first side surface S8 is convex and whose second side surface S9 is concave. The fifth lens L5 is a convex-convex lens with positive focal power, whose first side surface S9 is convex and whose second side surface S10 is convex. The sixth lens L6 is a convex-convex lens with positive focal power, whose first side surface S11 is convex and whose second side surface S12 is convex. Among them, the fourth lens L4 and the fifth lens L5 are cemented to form a double cemented lens.

[0247] The optical lens may further include a stop STO. The stop STO may be disposed between the third lens L3 and the fourth lens L4. For example, the stop STO may be disposed near the first side surface S8 of the fourth lens L4.

[0248] Optionally, the optical lens may further include a filter having a first side surface S13 and a second side surface S14 and / or a protective glass having a first side surface S15 and a second side surface S16.

[0249] The optical lens provided in this application can be used as, for example, a vehicle-mounted lens or a laser radar receiving end lens. In this case, Fig. 22 IMA may represent an imaging surface, for example, and light from an object sequentially passes through each surface S1 to S16 and is finally imaged on the imaging surface disposed on the second side, wherein an image sensor chip is disposed on the imaging surface. It should be understood that the optical lens provided in the present application may also be used as, for example, a projection lens or a laser radar transmitting end lens. In this case, Fig. 22 IMA may represent a light source surface, for example. Light from the light source surface sequentially passes through the surfaces S16 to S1 and is finally projected to the first side, for example, to form an image or illuminate an area on the first side.

[0250] Table 19 shows the radius of curvature R, thickness / distance, refractive index Nd and Abbe number Vd of each lens of the optical lens of Example 11. Table 20 shows the conic coefficient and high-order coefficient of each aspheric mirror surface that can be used in Example 11, wherein each aspheric surface shape can be defined by the formula (1) given in the above Example 1.

[0251] Table 19

[0252]

[0253] Table 20

[0254]

[0255] Fig.23 The distortion curve of the optical lens of Example 11 is shown, which indicates the distortion magnitude values ​​corresponding to different field angles. Fig.23 It can be seen that the optical lens of Example 11 achieves the characteristic of large central angular resolution by imaging distortion of part of the edge field of view. Example 12

[0256] The following reference Fig.24 An optical lens according to Example 12 of the present application is described. Fig.24 A schematic structural diagram of an optical lens according to Example 12 of the present application is shown.

[0257] like Fig.24 As shown, the optical lens includes a first lens L1, a second lens L2, a third lens L3, a fourth lens L4, a fifth lens L5 and a sixth lens L6 in sequence from the first side to the second side along the optical axis.

[0258] The first lens L1 is a convex-concave lens with negative focal power, whose first side surface S1 is convex and whose second side surface S2 is concave. The second lens L2 is a convex-concave lens with negative focal power, whose first side surface S3 is concave and whose second side surface S4 is concave. The third lens L3 is a convex-concave lens with positive focal power, whose first side surface S5 is convex and whose second side surface S6 is concave. The fourth lens L4 is a convex-concave lens with negative focal power, whose first side surface S8 is convex and whose second side surface S9 is concave. The fifth lens L5 is a convex-convex lens with positive focal power, whose first side surface S9 is convex and whose second side surface S10 is convex. The sixth lens L6 is a convex-convex lens with positive focal power, whose first side surface S11 is convex and whose second side surface S12 is convex. Among them, the fourth lens L4 and the fifth lens L5 are cemented to form a double cemented lens.

[0259] The optical lens may further include a stop STO. The stop STO may be disposed between the third lens L3 and the fourth lens L4. For example, the stop STO may be disposed near the first side surface S8 of the fourth lens L4.

[0260] Optionally, the optical lens may further include a filter having a first side surface S13 and a second side surface S14 and / or a protective glass having a first side surface S15 and a second side surface S16.

[0261] The optical lens provided in this application can be used as, for example, a vehicle-mounted lens or a laser radar receiving end lens. In this case, Fig.24 IMA may represent an imaging surface, for example, and light from an object sequentially passes through each surface S1 to S16 and is finally imaged on the imaging surface disposed on the second side, wherein an image sensor chip is disposed on the imaging surface. It should be understood that the optical lens provided in the present application may also be used as, for example, a projection lens or a laser radar transmitting end lens. In this case, Fig.24IMA may represent a light source surface, for example. Light from the light source surface sequentially passes through the surfaces S16 to S1 and is finally projected to the first side, for example, to form an image or illuminate an area on the first side.

[0262] Table 21 shows the radius of curvature R, thickness / distance, refractive index Nd and Abbe number Vd of each lens of the optical lens of Example 12. Table 22 shows the conic coefficient and high-order coefficient of each aspheric mirror surface that can be used in Example 12, wherein each aspheric surface shape can be defined by the formula (1) given in the above Example 1.

[0263] Table 21

[0264]

[0265] Table 22

[0266]

[0267] Fig.25 The distortion curve of the optical lens of Example 12 is shown, which indicates the distortion magnitude values ​​corresponding to different field angles. Fig.25 It can be seen that the optical lens of Example 12 achieves the characteristic of large central angular resolution by imaging distortion of part of the edge field of view.

[0268] The optical lenses shown in Examples 11 and 12 can achieve an MTF peak value of more than 0.72 in the central field of view when the spatial frequency is 65 lp / mm, thereby achieving high resolution. Example 13

[0269] The following reference Fig.26 An optical lens according to Example 13 of the present application is described. Fig.26 A schematic structural diagram of an optical lens according to Example 13 of the present application is shown.

[0270] like Fig.26 As shown, the optical lens includes a first lens L1, a second lens L2, a third lens L3, a fourth lens L4, a fifth lens L5 and a sixth lens L6 in sequence from the first side to the second side along the optical axis.

[0271] The first lens L1 is a convex-concave lens with negative focal power, whose first side surface S1 is convex and whose second side surface S2 is concave. The second lens L2 is a convex-concave lens with negative focal power, whose first side surface S3 is concave and whose second side surface S4 is convex. The third lens L3 is a convex-convex lens with positive focal power, whose first side surface S5 is convex and whose second side surface S6 is convex. The fourth lens L4 is a convex-concave lens with negative focal power, whose first side surface S8 is convex and whose second side surface S9 is concave. The fifth lens L5 is a convex-convex lens with positive focal power, whose first side surface S9 is convex and whose second side surface S10 is convex. The sixth lens L6 is a convex-concave lens with positive focal power, whose first side surface S11 is convex and whose second side surface S12 is concave. Among them, the fourth lens L4 and the fifth lens L5 are cemented to form a double cemented lens.

[0272] The optical lens may further include a stop STO. The stop STO may be disposed between the third lens L3 and the fourth lens L4. For example, the stop STO may be disposed near the first side surface S8 of the fourth lens L4.

[0273] Optionally, the optical lens may further include a filter having a first side surface S13 and a second side surface S14 and / or a protective glass having a first side surface S15 and a second side surface S16.

[0274] The optical lens provided in this application can be used as, for example, a vehicle-mounted lens or a laser radar receiving end lens. In this case, Fig.26 IMA may represent an imaging surface, for example, and light from an object sequentially passes through each surface S1 to S16 and is finally imaged on the imaging surface disposed on the second side, wherein an image sensor chip is disposed on the imaging surface. It should be understood that the optical lens provided in the present application may also be used as, for example, a projection lens or a laser radar transmitting end lens. In this case, Fig.26 IMA may represent a light source surface, for example. Light from the light source surface sequentially passes through the surfaces S16 to S1 and is finally projected to the first side, for example, to form an image or illuminate an area on the first side.

[0275] Table 23 shows the radius of curvature R, thickness / distance, refractive index Nd and Abbe number Vd of each lens of the optical lens of Example 13. Table 24 shows the conic coefficient and high-order coefficient of each aspheric mirror surface that can be used in Example 13, wherein each aspheric surface shape can be defined by the formula (1) given in the above Example 1.

[0276] Table 23

[0277]

[0278] Table 24

[0279]

[0280] Fig. 27 The distortion curve of the optical lens of Example 13 is shown, which indicates the distortion magnitude values ​​corresponding to different field angles. Fig. 27 It can be seen that the optical lens of Example 13 achieves the characteristic of large central angular resolution by imaging distortion of part of the edge field of view. Embodiment 14

[0281] The following reference Fig.28 An optical lens according to Example 14 of the present application is described. Fig.28 A schematic structural diagram of an optical lens according to Example 14 of the present application is shown.

[0282] like Fig.28 As shown, the optical lens includes a first lens L1, a second lens L2, a third lens L3, a fourth lens L4, a fifth lens L5 and a sixth lens L6 in sequence from the first side to the second side along the optical axis.

[0283] The first lens L1 is a convex-concave lens with negative focal power, whose first side surface S1 is convex and whose second side surface S2 is concave. The second lens L2 is a convex-concave lens with negative focal power, whose first side surface S3 is concave and whose second side surface S4 is convex. The third lens L3 is a convex-convex lens with positive focal power, whose first side surface S5 is convex and whose second side surface S6 is convex. The fourth lens L4 is a convex-concave lens with negative focal power, whose first side surface S8 is convex and whose second side surface S9 is concave. The fifth lens L5 is a convex-convex lens with positive focal power, whose first side surface S9 is convex and whose second side surface S10 is convex. The sixth lens L6 is a convex-concave lens with positive focal power, whose first side surface S11 is convex and whose second side surface S12 is concave. Among them, the fourth lens L4 and the fifth lens L5 are cemented to form a double cemented lens.

[0284] The optical lens may further include a stop STO. The stop STO may be disposed between the third lens L3 and the fourth lens L4. For example, the stop STO may be disposed near the first side surface S8 of the fourth lens L4.

[0285] Optionally, the optical lens may further include a filter having a first side surface S13 and a second side surface S14 and / or a protective glass having a first side surface S15 and a second side surface S16.

[0286] The optical lens provided in this application can be used as, for example, a vehicle-mounted lens or a laser radar receiving end lens. In this case, Fig.28 IMA may represent an imaging surface, for example, and light from an object sequentially passes through each surface S1 to S16 and is finally imaged on the imaging surface disposed on the second side, wherein an image sensor chip is disposed on the imaging surface. It should be understood that the optical lens provided in the present application may also be used as, for example, a projection lens or a laser radar transmitting end lens. In this case, Fig.28IMA may represent a light source surface, for example. Light from the light source surface sequentially passes through the surfaces S16 to S1 and is finally projected to the first side, for example, to form an image or illuminate an area on the first side.

[0287] Table 25 shows the radius of curvature R, thickness / distance, refractive index Nd and Abbe number Vd of each lens of the optical lens of Example 14. Table 26 shows the conic coefficient and high-order coefficient of each aspheric mirror surface that can be used in Example 14, wherein each aspheric surface shape can be defined by the formula (1) given in the above Example 1.

[0288] Table 25

[0289]

[0290] Table 26

[0291]

[0292] Fig.29 The distortion curve of the optical lens of Example 14 is shown, which indicates the distortion magnitude values ​​corresponding to different field angles. Fig.29 It can be seen that the optical lens of Example 14 achieves the characteristic of large central angular resolution by imaging distortion of part of the edge field of view.

[0293] The optical lenses shown in Examples 13 and 14 can achieve an MTF peak value of more than 0.77 in the central field of view when the spatial frequency is 65 lp / mm, thereby achieving high resolution. Embodiment 15

[0294] The following reference Fig.30 An optical lens according to Example 15 of the present application is described. Fig.30 A schematic structural diagram of an optical lens according to Example 15 of the present application is shown.

[0295] like Fig.30 As shown, the optical lens includes a first lens L1, a second lens L2, a third lens L3, a fourth lens L4, a fifth lens L5 and a sixth lens L6 in sequence from the first side to the second side along the optical axis.

[0296] The first lens L1 is a convex-concave lens with negative focal power, whose first side surface S1 is convex and whose second side surface S2 is concave. The second lens L2 is a convex-concave lens with negative focal power, whose first side surface S3 is concave and whose second side surface S4 is convex. The third lens L3 is a convex-convex lens with positive focal power, whose first side surface S5 is convex and whose second side surface S6 is convex. The fourth lens L4 is a convex-concave lens with negative focal power, whose first side surface S8 is convex and whose second side surface S9 is concave. The fifth lens L5 is a convex-convex lens with positive focal power, whose first side surface S9 is convex and whose second side surface S10 is convex. The sixth lens L6 is a convex-convex lens with positive focal power, whose first side surface S11 is convex and whose second side surface S12 is convex. Among them, the fourth lens L4 and the fifth lens L5 are cemented to form a double cemented lens.

[0297] The optical lens may further include a stop STO. The stop STO may be disposed between the third lens L3 and the fourth lens L4. For example, the stop STO may be disposed near the first side surface S8 of the fourth lens L4.

[0298] Optionally, the optical lens may further include a filter having a first side surface S13 and a second side surface S14 and / or a protective glass having a first side surface S15 and a second side surface S16.

[0299] The optical lens provided in this application can be used as, for example, a vehicle-mounted lens or a laser radar receiving end lens. In this case, Fig.30 IMA may represent an imaging surface, for example, and light from an object sequentially passes through each surface S1 to S16 and is finally imaged on the imaging surface disposed on the second side, wherein an image sensor chip is disposed on the imaging surface. It should be understood that the optical lens provided in the present application may also be used as, for example, a projection lens or a laser radar transmitting end lens. In this case, Fig.30 IMA may represent a light source surface, for example. Light from the light source surface sequentially passes through the surfaces S16 to S1 and is finally projected to the first side, for example, to form an image or illuminate an area on the first side.

[0300] Table 27 shows the curvature radius R, thickness / distance, refractive index Nd, and Abbe number Vd of each lens of the optical lens of Example 15. Each lens of the optical lens of Example 15 is a spherical lens.

[0301] Table 27

[0302]

[0303] Fig.31 The distortion curve of the optical lens of Example 15 is shown, which indicates the distortion magnitude values ​​corresponding to different field angles. Fig.31 It can be seen that the optical lens of Example 15 achieves the characteristic of large central angular resolution by imaging distortion of part of the edge field of view. Example 16

[0304] The following reference Fig.32 An optical lens according to Example 16 of the present application is described. Fig.32 A schematic structural diagram of an optical lens according to Example 16 of the present application is shown.

[0305] like Fig.32 As shown, the optical lens includes a first lens L1, a second lens L2, a third lens L3, a fourth lens L4, a fifth lens L5 and a sixth lens L6 in sequence from the first side to the second side along the optical axis.

[0306] The first lens L1 is a convex-concave lens with negative focal power, whose first side surface S1 is convex and whose second side surface S2 is concave. The second lens L2 is a convex-concave lens with negative focal power, whose first side surface S3 is concave and whose second side surface S4 is convex. The third lens L3 is a convex-convex lens with positive focal power, whose first side surface S5 is convex and whose second side surface S6 is convex. The fourth lens L4 is a convex-concave lens with negative focal power, whose first side surface S8 is convex and whose second side surface S9 is concave. The fifth lens L5 is a convex-convex lens with positive focal power, whose first side surface S9 is convex and whose second side surface S10 is convex. The sixth lens L6 is a convex-convex lens with positive focal power, whose first side surface S11 is convex and whose second side surface S12 is convex. Among them, the fourth lens L4 and the fifth lens L5 are cemented to form a double cemented lens.

[0307] The optical lens may further include a stop STO. The stop STO may be disposed between the third lens L3 and the fourth lens L4. For example, the stop STO may be disposed near the first side surface S8 of the fourth lens L4.

[0308] Optionally, the optical lens may further include a filter having a first side surface S13 and a second side surface S14 and / or a protective glass having a first side surface S15 and a second side surface S16.

[0309] The optical lens provided in this application can be used as, for example, a vehicle-mounted lens or a laser radar receiving end lens. In this case, Fig.32 IMA may represent an imaging surface, for example, and light from an object sequentially passes through each surface S1 to S16 and is finally imaged on the imaging surface disposed on the second side, wherein an image sensor chip is disposed on the imaging surface. It should be understood that the optical lens provided in the present application may also be used as, for example, a projection lens or a laser radar transmitting end lens. In this case, Fig.32 IMA may represent a light source surface, for example. Light from the light source surface sequentially passes through the surfaces S16 to S1 and is finally projected to the first side, for example, to form an image or illuminate an area on the first side.

[0310] Table 28 shows the curvature radius R, thickness / distance, refractive index Nd, and Abbe number Vd of each lens of the optical lens of Example 16. Each lens of the optical lens of Example 16 is a spherical lens.

[0311] Table 28

[0312]

[0313] Fig.33 The distortion curve of the optical lens of Example 16 is shown, which indicates the distortion magnitude values ​​corresponding to different field angles. Fig.33 It can be seen that the optical lens of Example 16 achieves the characteristic of large central angular resolution by imaging distortion of part of the edge field of view. Embodiment 17

[0314] The following reference Fig.34 An optical lens according to Example 17 of the present application is described. Fig.34 A schematic structural diagram of an optical lens according to Example 17 of the present application is shown.

[0315] like Fig.34 As shown, the optical lens includes a first lens L1, a second lens L2, a third lens L3, a fourth lens L4, a fifth lens L5 and a sixth lens L6 in sequence from the first side to the second side along the optical axis.

[0316] The first lens L1 is a convex-concave lens with negative focal power, whose first side surface S1 is convex and whose second side surface S2 is concave. The second lens L2 is a convex-concave lens with negative focal power, whose first side surface S3 is concave and whose second side surface S4 is convex. The third lens L3 is a convex-concave lens with positive focal power, whose first side surface S5 is convex and whose second side surface S6 is concave. The fourth lens L4 is a convex-convex lens with positive focal power, whose first side surface S8 is convex and whose second side surface S9 is convex. The fifth lens L5 is a convex-convex lens with negative focal power, whose first side surface S9 is concave and whose second side surface S10 is convex. The sixth lens L6 is a convex-convex lens with positive focal power, whose first side surface S11 is convex and whose second side surface S12 is convex. Among them, the fourth lens L4 and the fifth lens L5 are cemented to form a double cemented lens.

[0317] The optical lens may further include a stop STO. The stop STO may be disposed between the third lens L3 and the fourth lens L4. For example, the stop STO may be disposed near the first side surface S8 of the fourth lens L4.

[0318] Optionally, the optical lens may further include a filter having a first side surface S13 and a second side surface S14 and / or a protective glass having a first side surface S15 and a second side surface S16.

[0319] The optical lens provided in this application can be used as, for example, a vehicle-mounted lens or a laser radar receiving end lens. In this case, Fig.34 IMA may represent an imaging surface, for example, and light from an object sequentially passes through each surface S1 to S16 and is finally imaged on the imaging surface disposed on the second side, wherein an image sensor chip is disposed on the imaging surface. It should be understood that the optical lens provided in the present application may also be used as, for example, a projection lens or a laser radar transmitting end lens. In this case, Fig.34 IMA may represent a light source surface, for example. Light from the light source surface sequentially passes through the surfaces S16 to S1 and is finally projected to the first side, for example, to form an image or illuminate an area on the first side.

[0320] Table 29 shows the radius of curvature R, thickness / distance, refractive index Nd and Abbe number Vd of each lens of the optical lens of Example 17. Table 30 shows the conic coefficient and high-order coefficient of each aspheric mirror surface that can be used in Example 17, wherein each aspheric surface shape can be defined by the formula (1) given in the above Example 1.

[0321] Table 29

[0322]

[0323] Table 30

[0324]

[0325] Fig.35 The distortion curve of the optical lens of Example 17 is shown, which indicates the distortion magnitude values ​​corresponding to different field angles. Fig.35 It can be seen that the optical lens of Example 17 achieves the characteristic of large central angular resolution by imaging distortion of part of the edge field of view. Embodiment 18

[0326] The following reference Fig.36 An optical lens according to Example 18 of the present application is described. Fig.36 A schematic structural diagram of an optical lens according to Example 18 of the present application is shown.

[0327] like Fig.36 As shown, the optical lens includes a first lens L1, a second lens L2, a third lens L3, a fourth lens L4, a fifth lens L5 and a sixth lens L6 in sequence from the first side to the second side along the optical axis.

[0328] The first lens L1 is a convex-concave lens with negative focal power, whose first side surface S1 is convex and whose second side surface S2 is concave. The second lens L2 is a convex-concave lens with negative focal power, whose first side surface S3 is concave and whose second side surface S4 is convex. The third lens L3 is a convex-concave lens with positive focal power, whose first side surface S5 is convex and whose second side surface S6 is concave. The fourth lens L4 is a convex-convex lens with positive focal power, whose first side surface S8 is convex and whose second side surface S9 is convex. The fifth lens L5 is a convex-convex lens with negative focal power, whose first side surface S9 is concave and whose second side surface S10 is convex. The sixth lens L6 is a convex-convex lens with positive focal power, whose first side surface S11 is convex and whose second side surface S12 is convex. Among them, the fourth lens L4 and the fifth lens L5 are cemented to form a double cemented lens.

[0329] The optical lens may further include a stop STO. The stop STO may be disposed between the third lens L3 and the fourth lens L4. For example, the stop STO may be disposed near the first side surface S8 of the fourth lens L4.

[0330] Optionally, the optical lens may further include a filter having a first side surface S13 and a second side surface S14 and / or a protective glass having a first side surface S15 and a second side surface S16.

[0331] The optical lens provided in this application can be used as, for example, a vehicle-mounted lens or a laser radar receiving end lens. In this case, Fig.36 IMA may represent an imaging surface, for example, and light from an object sequentially passes through each surface S1 to S16 and is finally imaged on the imaging surface disposed on the second side, wherein an image sensor chip is disposed on the imaging surface. It should be understood that the optical lens provided in the present application may also be used as, for example, a projection lens or a laser radar transmitting end lens. In this case, Fig.36 IMA may represent a light source surface, for example. Light from the light source surface sequentially passes through the surfaces S16 to S1 and is finally projected to the first side, for example, to form an image or illuminate an area on the first side.

[0332] Table 31 shows the radius of curvature R, thickness / distance, refractive index Nd and Abbe number Vd of each lens of the optical lens of Example 18. Table 32 shows the conic coefficient and high-order coefficient of each aspheric mirror surface that can be used in Example 18, wherein each aspheric surface shape can be defined by the formula (1) given in the above Example 1.

[0333] Table 31

[0334]

[0335] Table 32

[0336]

[0337] Fig.37 The distortion curve of the optical lens of Example 18 is shown, which indicates the distortion magnitude values ​​corresponding to different field angles. Fig.37 It can be seen that the optical lens of Example 18 achieves the characteristic of large central angular resolution by imaging distortion of part of the edge field of view.

[0338] The optical lenses shown in Examples 17 and 18 can achieve an MTF peak value of more than 0.74 in the central field of view when the spatial frequency is 65 lp / mm, thereby achieving high resolution.

[0339] In addition, it should be noted that the optical lenses provided in Examples 1 to 18 of the present application can all achieve good imaging quality, and their modulation transfer function curves are relatively close. Therefore, only the modulation transfer function curves of Examples 1 and 2 are exemplarily shown in the present application, and the modulation transfer function curves of other embodiments are no longer shown one by one, and those skilled in the art should be able to know based on the contents disclosed in the present application.

[0340] In summary, Example 1 to Example 18 respectively satisfy the relationships shown in Table 33-1 and Table 33-2 below. In Table 33-1 and Table 33-2, the units of F, ENPD, TTL, H, D, BFL, DST, DMAX, F1~F6, SAG1 and F45 are millimeters (mm), the unit of FOV is degrees (°), and the unit of θ is radians (rad).

[0341] Table 33-1

[0342]

[0343] Table 33-2

[0344]

[0345] 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 device such as a detection distance device. In addition, the electronic device may also be an independent imaging device such as a vehicle-mounted camera, or an imaging module integrated in a driving assistance system such as a vehicle-mounted camera.

[0346] 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 includes, in sequence from the first side to the second side along the optical axis: A first lens having negative optical power, wherein the first side surface is convex and the second side surface is concave; a second lens having optical power, wherein the first side surface of the second lens is concave; a third lens element having positive power, wherein the first side surface of the third lens element is convex; a fourth lens having optical power; a fifth lens having optical power; and a sixth lens having positive power, wherein the first side surface of the sixth lens is convex; The positive and negative properties of the optical power of the fourth lens and the fifth lens are opposite; The center thickness d8 of the fourth lens on the optical axis, the center thickness d9 of the fifth lens on the optical axis, 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: 0.04≤(d8+d9) / TTL≤0.28; The effective focal length F2 of the second lens and the effective focal length F of the optical lens satisfy: 2.8≤|F2 / F|; The effective focal length F6 of the sixth lens and the effective focal length F of the optical lens satisfy the following conditions: 1.25≤F6 / F≤3.5; An air gap d34 between the third lens and the fourth 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: 0.12≤d34 / TTL≤0.32; 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 and an effective focal length F of the optical lens satisfy the following conditions: 6≤TTL / F≤8.5; The image height H corresponding to the maximum field angle of the optical lens, the effective focal length F of the optical lens and the arc value θ corresponding to the maximum field angle of the optical lens satisfy: 0.5≤(H / 2) / (F×tan(θ / 2))≤0.

95.

2. The optical lens according to claim 1, wherein: The second lens has positive optical power, and the second side surface thereof is convex; or The second lens has negative optical power, and the second side surface of the second lens is a convex surface or a concave surface.

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

4. The optical lens according to claim 1, wherein: The fourth lens has negative optical power, the first side surface of the fourth lens is convex or concave, and the second side surface is concave; or The fourth lens has positive optical power, and its first side surface is convex, and its second side surface is convex.

5. The optical lens according to claim 1, wherein: The fifth lens has positive power, and its first side surface is convex, and its second side surface is convex; or The fifth lens has negative optical power, a first side surface of the fifth lens is concave, and a second side surface of the fifth lens is convex.

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

7. The optical lens according to any one of claims 1 to 6, characterized in that: The optical lens satisfies: 0.15≤BFL / TTL≤0.285, wherein BFL is the distance from the center of the second side surface of the sixth 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.

8. The optical lens according to any one of claims 1 to 6, characterized in that: The optical lens satisfies: 1≤F3 / F6≤2.5, wherein F3 is the effective focal length of the third lens, and F6 is the effective focal length of the sixth lens.

9. The optical lens according to any one of claims 1 to 6, characterized in that: The optical lens satisfies: 2.2≤R1 / R2≤100, wherein R1 is a central curvature radius of a first side surface of the first lens, and R2 is a central curvature radius of a second side surface of the first lens.

10. The optical lens according to any one of claims 1 to 6, characterized in that: The optical lens satisfies: 3≤F45 / F≤200, wherein F45 is the combined focal length of the fourth lens and the fifth lens, and F is the effective focal length of the optical lens.

11. The optical lens according to any one of claims 1 to 6, characterized in that: The optical lens satisfies: 0.005≤D / H / FOV×1°≤0.025, wherein D is the maximum effective aperture of the first side surface of the first lens corresponding to the maximum field of view of the optical lens, 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.

12. The optical lens according to any one of claims 1 to 6, characterized in that: The optical lens satisfies: 0.4≤F / H≤0.85, wherein F is the effective focal length of the optical lens, and H is the image height corresponding to the maximum field angle of the optical lens.

13. The optical lens according to any one of claims 1 to 6, characterized in that: The optical lens satisfies: -2.5≤F1 / F≤-1, wherein F1 is the effective focal length of the first lens, and F is the effective focal length of the optical lens.

14. The optical lens according to any one of claims 1 to 6, characterized in that: The optical lens satisfies: 2.65≤F3 / F≤5, wherein F3 is the effective focal length of the third lens, and F is the effective focal length of the optical lens.

15. The optical lens according to any one of claims 1 to 6, characterized in that: The optical lens meets at least one of the following conditions: 2.0≤TTL / DMAX≤4.5, 0.03≤TTL / H / FOV×1°≤0.08, 0.2≤(F×θ) / D≤0.7684, 0.08mm -1 ≤D / H / F≤0.8 mm -1 , 0.85≤DST / F≤1.85, 1.45≤F / ENPD≤1.65, 0.008°≤arctan(SAG1 / (D / 2))≤0.5°, 1.25≤R5 / F≤8, -1.5≤R2 / R3≤-0.015, 1.0≤R11 / F≤5, Among them, DMAX is the maximum light clearance aperture of all lenses corresponding to the maximum field of view angle of the optical lens, H is the image height corresponding to the maximum field of view angle of the optical lens, FOV is the maximum field of view angle of the optical lens, θ is the radian value corresponding to the maximum field of view angle of the optical lens, D is the maximum effective light clearance aperture of the first side of the first lens corresponding to the maximum field of view angle of the optical lens, the optical lens also includes an aperture, DST is the effective aperture of the aperture, ENPD is the entrance pupil diameter of the optical lens, SAG1 is the vector height corresponding to the first side of the first lens at the maximum field of view angle of the optical lens, R5 is the central curvature radius of the first side of the third lens, R2 is the central curvature radius of the second side of the first lens, R3 is the central curvature radius of the first side of the second lens, and R11 is the central curvature radius of the first side of the sixth lens.

16. The optical lens according to any one of claims 1 to 6, characterized in that: The optical lens meets at least one of the following conditions: 2.75≤TTL / DMAX≤3.78, 0.039≤TTL / H / FOV×1°≤0.06, 7≤TTL / F≤7.6, 0.010≤D / H / FOV×1°≤0.02, 0.3≤(F×θ) / D≤0.7684, 0.12 mm -1 ≤D / H / F≤0.6 mm -1 , 0.17≤BFL / TTL≤0.275, 1.05≤F3 / F6≤1.8, 2.05≤F6 / F≤3.1, 2.7≤F3 / F≤4.6, 0.125≤d34 / TTL≤0.29, -2≤F1 / F≤-1.4, 0.5≤F / H≤0.7, 3.5≤|F2 / F|≤225, 3.8≤F45 / F≤70, 1.1≤DST / F≤1.45, 1.5≤F / ENPD≤1.62, 0.6≤(H / 2) / (F×tan(θ / 2))≤0.9, 0.008°≤arctan(SAG1 / (D / 2))≤0.3°, 2.5≤R1 / R2≤52, 0.07≤(d8+d9) / TTL≤0.22, 1.45≤R5 / F≤7.2, -0.8≤R2 / R3≤-0.024, 1.2≤R11 / F≤4.1, Wherein, DMAX is the maximum aperture of all lenses corresponding to the maximum field of view of the optical lens, H is the image height corresponding to the maximum field of view of the optical lens, FOV is the maximum field of view of the optical lens, θ is the radian value corresponding to the maximum field of view of the optical lens, D is the maximum effective aperture of the first side surface of the first lens corresponding to the maximum field of view of the optical lens, BFL is the distance from the center of the second side surface of the sixth lens to the imaging surface of the optical lens on the optical axis, F3 is the effective focal length of the third lens, F1 is the effective focal length of the first lens, F45 is the effective focal length of the third lens, is the combined focal length of the fourth lens and the fifth lens, the optical lens also includes a stop, DST is the effective aperture of the stop, ENPD is the entrance pupil diameter of the optical lens, SAG1 is the sag corresponding to the first side surface of the first lens at the maximum field of view angle of the optical lens, R1 is the curvature radius of the first side surface of the first lens, R2 is the curvature radius of the second side surface of the first lens, R5 is the central curvature radius of the first side surface of the third lens, R3 is the central curvature radius of the first side surface of the second lens, and R11 is the central curvature radius of the first side surface of the sixth lens.

17. The optical lens according to any one of claims 1 to 6, characterized in that: The optical lens meets at least one of the following conditions: 2.9014≤TTL / DMAX≤3.5241, 0.0450≤TTL / H / FOV×1°≤0.0531, 7.1940≤TTL / F≤7.4137, 0.0138≤D / H / FOV×1°≤0.0183, 0.6311≤(F×θ) / D≤0.7684, 0.2793 mm -1 ≤D / H / F≤0.3724 mm -1 , 0.1975≤BFL / TTL≤0.2602, 1.1350≤F3 / F6≤1.5695, 2.3568≤F6 / F≤2.8270, 2.8814≤F3 / F≤4.4353, 0.1280≤d34 / TTL≤0.2255, -1.8738≤F1 / F≤-1.5233, 0.5625≤F / H≤0.6759, 4.5765≤|F2 / F|≤137.5919, 5.0228≤F45 / F≤46.0526, 1.1838≤DST / F≤1.3927, 1.5600≤F / ENPD≤1.5600, 0.7168≤(H / 2) / (F×tan(θ / 2))≤0.8615, 0.0162°≤arctan(SAG1 / (D / 2))≤0.1973°, 2.8346≤R1 / R2≤33.4638, 0.0920≤(d8+d9) / TTL≤0.1803, 1.6538≤R5 / F≤5.2622, -0.5025≤R2 / R3≤-0.0371, 1.7972≤R11 / F≤3.5797, Wherein, DMAX is the maximum aperture of all lenses corresponding to the maximum field of view of the optical lens, H is the image height corresponding to the maximum field of view of the optical lens, FOV is the maximum field of view of the optical lens, θ is the radian value corresponding to the maximum field of view of the optical lens, D is the maximum effective aperture of the first side surface of the first lens corresponding to the maximum field of view of the optical lens, BFL is the distance from the center of the second side surface of the sixth lens to the imaging surface of the optical lens on the optical axis, F3 is the effective focal length of the third lens, F1 is the effective focal length of the first lens, F45 is the effective focal length of the third lens, is the combined focal length of the fourth lens and the fifth lens, the optical lens also includes a stop, DST is the effective aperture of the stop, ENPD is the entrance pupil diameter of the optical lens, SAG1 is the sag corresponding to the first side surface of the first lens at the maximum field of view angle of the optical lens, R1 is the curvature radius of the first side surface of the first lens, R2 is the curvature radius of the second side surface of the first lens, R5 is the central curvature radius of the first side surface of the third lens, R3 is the central curvature radius of the first side surface of the second lens, and R11 is the central curvature radius of the first side surface of the sixth lens.

18. An electronic device, characterized in that: The invention comprises an optical lens according to any one of claims 1 to 17 and an imaging element for converting an optical image formed by the optical lens into an electrical signal.

Images