Optical lens and electronic equipment

Abstract

The invention discloses an optical lens and electronic equipment comprising the same. The optical lens sequentially comprises a first lens with positive focal power from a first side to a second side along an optical axis, a second lens with negative focal power, a third lens with positive focal power and a fourth lens with positive focal power, the first side surface of the second lens is a concave surface, and the second side surface of the second lens is a convex surface; the third lens has positive focal power, and the second side surface of the third lens is a convex surface; the fourth lens has positive focal power, and the first side surface of the fourth lens is a convex surface; the first side surface of the fifth lens is a convex surface, and the second side surface of the fifth lens is a concave surface; the first side surface of the sixth lens is a convex surface, and the second side surface of the sixth lens is a concave surface.

Description

Technical Field

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

[0002] With the improvement of the imaging quality of optical lenses, optical lenses have been widely used in various fields. For example, optical lenses play an irreplaceable role in many fields such as intelligent detection, security monitoring, smartphones, lidar, and automotive assisted driving. At the same time, lens manufacturers in major fields have begun to spare no effort to invest a lot of time and energy in the research and development of lens performance.

[0003] In particular, with the rapid development of automotive assisted driving systems and lidar systems, optical lenses have been widely used in automotive assisted driving systems and lidar systems. For example, optical lenses play an irreplaceable role in automotive assisted driving systems such as in-vehicle reverse vision systems, dash cams, automatic parking, panoramic parking systems, and road path finding systems, as well as in lidar systems such as lidar transmitters and lidar receivers. Therefore, as one of the main tools for vehicles and / or lidar to transmit information to the outside world, optical lenses mounted on vehicles and / or lidar are increasingly required to have higher resolution and smaller size in the market.

[0004] In addition, compared with ordinary optical lenses, in automotive assisted driving systems and lidar systems, optical lenses mounted on them have more special requirements to meet the requirements of safe driving and special installation position requirements. Summary of the Invention

[0005] The present application provides an optical lens, which sequentially includes, along the optical axis from the first side to the second side: a first lens with positive optical power, whose first side is convex and the second side is concave; a second lens with negative optical power, whose first side is concave and the second side is convex; a third lens with positive optical power, whose second side is convex; a fourth lens with positive optical power, whose first side is convex; a fifth lens with positive optical power, whose first side is convex and the second side is concave; and a sixth lens with optical power, whose first side is convex and the second side is concave.

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

[0007] In one embodiment, the second side of the fourth lens is convex or concave.

[0008] In one embodiment, the sixth lens has positive optical power.

[0009] In one embodiment, the sixth lens has a negative optical power.

[0010] In one embodiment, the total length TTL of the optical lens, the maximum field of view angle FOV of the optical lens, and the image height H corresponding to the maximum field of view angle of the optical lens may satisfy: TTL / H / FOV×180°≤90.

[0011] In one embodiment, the maximum clear aperture D of the first side of the first lens corresponding to the maximum field of view angle of the optical lens, the image height H corresponding to the maximum field of view angle of the optical lens, and the radian value θ of the maximum field of view angle of the optical lens may satisfy: 0≤D / H / θ≤9.

[0012] In one embodiment, the maximum clear aperture D of the first side of the first lens corresponding to the maximum field of view angle of the optical lens, the image height H corresponding to the maximum field of view angle of the optical lens, and the total effective focal length F of the optical lens may satisfy: D / H / F≤0.5mm -1 。

[0013] In one embodiment, the total effective focal length F of the optical lens, the radian value θ of the maximum field of view angle of the optical lens, and the maximum clear aperture D of the first side of the first lens corresponding to the maximum field of view angle of the optical lens may satisfy: F×θ / D≥0.1.

[0014] In one embodiment, the back focal length BFL of the optical lens and the total length TTL of the optical lens may satisfy: BFL / TTL≤0.4.

[0015] In one embodiment, the effective focal length F2 of the second lens and the effective focal length F3 of the third lens may satisfy: |F2 / F3|≤1.2.

[0016] In one embodiment, the entrance pupil diameter ENPD of the optical lens and the total effective focal length F of the optical lens may satisfy: F / ENPD≤1.1.

[0017] In one embodiment, the total effective focal length F of the optical lens and the image height H corresponding to the maximum field of view angle of the optical lens may satisfy: 1≤F / H≤2.5.

[0018] In one embodiment, the image height H corresponding to the maximum field of view angle of the optical lens, the total effective focal length F of the optical lens, and the radian value θ of the maximum field of view angle of the optical lens may satisfy: 0.5≤(H / 2) / (F×tan(θ / 2))≤1.5.

[0019] In one embodiment, the total length TTL of the optical lens and the total effective focal length F of the optical lens may satisfy: TTL / F≤6.

[0020] In one embodiment, the effective focal length F1 of the first lens and the total effective focal length F of the optical lens may satisfy: F1 / F ≥ 2.

[0021] In one embodiment, the effective focal length F2 of the second lens and the total effective focal length F of the optical lens may satisfy: -5 ≤ F2 / F ≤ -0.5.

[0022] In one embodiment, the effective focal length F3 of the third lens and the total effective focal length F of the optical lens may satisfy: 2 ≤ F3 / F ≤ 12.

[0023] In one embodiment, the effective focal length F4 of the fourth lens and the total effective focal length F of the optical lens may satisfy: 1 ≤ F4 / F ≤ 6.

[0024] In one embodiment, the effective focal length F5 of the fifth lens and the total effective focal length F of the optical lens may satisfy: 0.5 ≤ F5 / F ≤ 6.

[0025] In one embodiment, the effective focal length F6 of the sixth lens and the total effective focal length F of the optical lens may satisfy: 6 ≤ F6 / F ≤ 10.

[0026] In one embodiment, the radius of curvature R2 of the second side of the first lens and the radius of curvature R3 of the first side of the second lens may satisfy: R2 / R3 ≤ 0.

[0027] In one embodiment, the radius of curvature R2 of the second side of the first lens and the radius of curvature R3 of the first side of the second lens may satisfy: -2.5 ≤ R2 / R3 ≤ -0.8.

[0028] In one embodiment, the radius of curvature R4 of the second side of the second lens and the effective focal length F2 of the second lens may satisfy: R4 / F2 ≥ 2.

[0029] In one embodiment, the radius of curvature R4 of the second side of the second lens and the effective focal length F2 of the second lens may satisfy: 2.5 ≤ R4 / F2 ≤ 6.

[0030] In one embodiment, the optical lens may satisfy: D / DMAX ≤ 2, where D is the maximum clear aperture of the first side of the first lens corresponding to the maximum field of view angle of the optical lens, and DMAX is the maximum value of the maximum clear apertures from the first side of the first lens to the second side of the sixth lens corresponding to the maximum field of view angle of the optical lens.

[0031] In one embodiment, the optical lens may satisfy: 0.6 ≤ D / DMAX ≤ 1.3, where D is the maximum clear aperture of the first side of the first lens corresponding to the maximum field of view angle of the optical lens, and DMAX is the maximum value among the maximum clear apertures from the first side of the first lens corresponding to the maximum field of view angle of the optical lens to the second side of the sixth lens.

[0032] In one embodiment, the radius of curvature R1 of the first side of the first lens and the radius of curvature R2 of the second side of the first lens may satisfy: 0.6 ≤ R1 / R2 ≤ 1.

[0033] In one embodiment, the radius of curvature R1 of the first side of the first lens and the radius of curvature R2 of the second side of the first lens may satisfy: 0.7 ≤ R1 / R2 ≤ 0.85.

[0034] In one embodiment, the radius of curvature R5 of the first side of the third lens and the radius of curvature R6 of the second side of the third lens may satisfy: |R5 / R6| ≤ 4.5.

[0035] In one embodiment, the radius of curvature R5 of the first side of the third lens and the radius of curvature R6 of the second side of the third lens may satisfy: 0.9 ≤ |R5 / R6| ≤ 3.5.

[0036] In one embodiment, the maximum clear aperture D of the first side of the first lens corresponding to the maximum field of view angle of the optical lens and the total length TTL of the optical lens may satisfy: 0.2 ≤ D / TTL ≤ 0.6.

[0037] In one embodiment, the maximum clear aperture D of the first side of the first lens corresponding to the maximum field of view angle of the optical lens and the total length TTL of the optical lens may satisfy: 0.35 ≤ D / TTL ≤ 0.5.

[0038] In one embodiment, the radius of curvature R12 of the first side of the sixth lens and the radius of curvature R13 of the second side of the sixth lens may satisfy: 0.6 ≤ R12 / R13 ≤ 1.5.

[0039] In one embodiment, the radius of curvature R12 of the first side of the sixth lens and the radius of curvature R13 of the second side of the sixth lens may satisfy: 0.95 ≤ R12 / R13 ≤ 1.2.

[0040] In one embodiment, the radius of curvature R12 of the first side of the sixth lens and the back focal length BFL of the optical lens may satisfy: 1.6 ≤ R12 / BFL ≤ 2.5.

[0041] In one embodiment, the radius of curvature R12 of the first side surface of the sixth lens and the back focal length BFL of the optical lens may satisfy: 1.8 ≤ R12 / BFL ≤ 2.3.

[0042] In one embodiment, the maximum clear aperture D6 of the second side surface of the third lens corresponding to the maximum field of view angle of the optical lens, the maximum clear aperture D7 of the first side surface of the fourth lens corresponding to the maximum field of view angle of the optical lens, and the maximum clear aperture D of the first side surface of the first lens corresponding to the maximum field of view angle of the optical lens may satisfy: 0.7 ≤ (D6 + D7) / 2 / D ≤ 1.5.

[0043] In one embodiment, the maximum clear aperture D6 of the second side surface of the third lens corresponding to the maximum field of view angle of the optical lens, the maximum clear aperture D7 of the first side surface of the fourth lens corresponding to the maximum field of view angle of the optical lens, and the maximum clear aperture D of the first side surface of the first lens corresponding to the maximum field of view angle of the optical lens may satisfy: 0.85 ≤ (D6 + D7) / 2 / D ≤ 1.2.

[0044] On the other hand, the present application provides an optical lens. The optical lens sequentially includes, along the optical axis, from the first side to the second side: a first lens with a positive optical power; a second lens with a negative optical power; a third lens with a positive optical power; a fourth lens with a positive optical power; a fifth lens with a positive optical power; and a sixth lens with an optical power; wherein, the radius of curvature R4 of the second side surface of the second lens and the effective focal length F2 of the second lens may satisfy: R4 / F2 ≥ 2.

[0045] In one embodiment, the first side surface of the first lens is convex and the second side surface is concave.

[0046] In one embodiment, the first side surface of the second lens is concave and the second side surface is convex.

[0047] In one embodiment, the first side surface of the third lens is convex or concave, and the second side surface is convex.

[0048] In one embodiment, the first side surface of the fourth lens is convex, and the second side surface is convex or concave.

[0049] In one embodiment, the first side surface of the fifth lens is convex and the second side surface is concave.

[0050] In one embodiment, the sixth lens has a positive optical power, its first side surface is convex, and its second side surface is concave.

[0051] In one embodiment, the sixth lens has a negative optical power, its first side surface is convex, and its second side surface is concave.

[0052] In one embodiment, the total length TTL of the optical lens, the maximum field of view FOV of the optical lens, and the image height H corresponding to the maximum field of view of the optical lens may satisfy: TTL / H / FOV×180°≤90.

[0053] In one embodiment, the maximum clear aperture D of the first side of the first lens corresponding to the maximum field of view of the optical lens, the image height H corresponding to the maximum field of view of the optical lens, and the radian value θ of the maximum field of view of the optical lens may satisfy: 0≤D / H / θ≤9.

[0054] In one embodiment, the maximum clear aperture D of the first side of the first lens corresponding to the maximum field of view of the optical lens, the image height H corresponding to the maximum field of view of the optical lens, and the total effective focal length F of the optical lens may satisfy: D / H / F≤0.5mm -1 。

[0055] In one embodiment, the total effective focal length F of the optical lens, the radian value θ of the maximum field of view of the optical lens, and the maximum clear aperture D of the first side of the first lens corresponding to the maximum field of view of the optical lens may satisfy: F×θ / D≥0.1.

[0056] In one embodiment, the back focal length BFL of the optical lens and the total length TTL of the optical lens may satisfy: BFL / TTL≤0.4.

[0057] In one embodiment, the effective focal length F2 of the second lens and the effective focal length F3 of the third lens may satisfy: |F2 / F3|≤1.2.

[0058] In one embodiment, the entrance pupil diameter ENPD of the optical lens and the total effective focal length F of the optical lens may satisfy: F / ENPD≤1.1.

[0059] In one embodiment, the total effective focal length F of the optical lens and the image height H corresponding to the maximum field of view of the optical lens may satisfy: 1≤F / H≤2.5.

[0060] In one embodiment, the image height H corresponding to the maximum field of view of the optical lens, the total effective focal length F of the optical lens, and the radian value θ of the maximum field of view of the optical lens may satisfy: 0.5≤(H / 2) / (F×tan(θ / 2))≤1.5.

[0061] In one embodiment, the total length TTL of the optical lens and the total effective focal length F of the optical lens may satisfy: TTL / F≤6.

[0062] In one embodiment, the effective focal length F1 of the first lens and the total effective focal length F of the optical lens may satisfy: F1 / F≥2.

[0063] In one embodiment, the effective focal length F2 of the second lens and the total effective focal length F of the optical lens may satisfy: -5 ≤ F2 / F ≤ -0.5.

[0064] In one embodiment, the effective focal length F3 of the third lens and the total effective focal length F of the optical lens may satisfy: 2 ≤ F3 / F ≤ 12.

[0065] In one embodiment, the effective focal length F4 of the fourth lens and the total effective focal length F of the optical lens may satisfy: 1 ≤ F4 / F ≤ 6.

[0066] In one embodiment, the effective focal length F5 of the fifth lens and the total effective focal length F of the optical lens may satisfy: 0.5 ≤ F5 / F ≤ 6.

[0067] In one embodiment, the effective focal length F6 of the sixth lens and the total effective focal length F of the optical lens may satisfy: 6 ≤ F6 / F ≤ 10.

[0068] In one embodiment, the radius of curvature R2 of the second surface of the first lens and the radius of curvature R3 of the first surface of the second lens may satisfy: R2 / R3 ≤ 0.

[0069] In one embodiment, the radius of curvature R2 of the second surface of the first lens and the radius of curvature R3 of the first surface of the second lens may satisfy: -2.5 ≤ R2 / R3 ≤ -0.8.

[0070] In one embodiment, the radius of curvature R4 of the second surface of the second lens and the effective focal length F2 of the second lens may satisfy: 2.5 ≤ R4 / F2 ≤ 6.

[0071] In one embodiment, the optical lens may satisfy: D / DMAX ≤ 2, where D is the maximum clear aperture of the first surface of the first lens corresponding to the maximum field of view angle of the optical lens, and DMAX is the maximum value among the maximum clear apertures from the first surface of the first lens to the second surface of the sixth lens corresponding to the maximum field of view angle of the optical lens.

[0072] In one embodiment, the optical lens may satisfy: 0.6 ≤ D / DMAX ≤ 1.3, where D is the maximum clear aperture of the first surface of the first lens corresponding to the maximum field of view angle of the optical lens, and DMAX is the maximum value among the maximum clear apertures from the first surface of the first lens to the second surface of the sixth lens corresponding to the maximum field of view angle of the optical lens.

[0073] In one embodiment, the radius of curvature R1 of the first surface of the first lens and the radius of curvature R2 of the second surface of the first lens may satisfy: 0.6 ≤ R1 / R2 ≤ 1.

[0074] In one embodiment, the radius of curvature R1 of the first side surface of the first lens and the radius of curvature R2 of the second side surface of the first lens may satisfy: 0.7 ≤ R1 / R2 ≤ 0.85.

[0075] In one embodiment, the radius of curvature R5 of the first side surface of the third lens and the radius of curvature R6 of the second side surface of the third lens may satisfy: |R5 / R6| ≤ 4.5.

[0076] In one embodiment, the radius of curvature R5 of the first side surface of the third lens and the radius of curvature R6 of the second side surface of the third lens may satisfy: 0.9 ≤ |R5 / R6| ≤ 3.5.

[0077] In one embodiment, the maximum clear aperture D of the first side surface of the first lens corresponding to the maximum field of view angle of the optical lens and the total length TTL of the optical lens may satisfy: 0.2 ≤ D / TTL ≤ 0.6.

[0078] In one embodiment, the maximum clear aperture D of the first side surface of the first lens corresponding to the maximum field of view angle of the optical lens and the total length TTL of the optical lens may satisfy: 0.35 ≤ D / TTL ≤ 0.5.

[0079] In one embodiment, the radius of curvature R12 of the first side surface of the sixth lens and the radius of curvature R13 of the second side surface of the sixth lens may satisfy: 0.6 ≤ R12 / R13 ≤ 1.5.

[0080] In one embodiment, the radius of curvature R12 of the first side surface of the sixth lens and the radius of curvature R13 of the second side surface of the sixth lens may satisfy: 0.95 ≤ R12 / R13 ≤ 1.2.

[0081] In one embodiment, the radius of curvature R12 of the first side surface of the sixth lens and the back focal length BFL of the optical lens may satisfy: 1.6 ≤ R12 / BFL ≤ 2.5.

[0082] In one embodiment, the radius of curvature R12 of the first side surface of the sixth lens and the back focal length BFL of the optical lens may satisfy: 1.8 ≤ R12 / BFL ≤ 2.3.

[0083] In one embodiment, the maximum clear aperture D6 of the second side surface of the third lens corresponding to the maximum field of view angle of the optical lens, the maximum clear aperture D7 of the first side surface of the fourth lens corresponding to the maximum field of view angle of the optical lens, and the maximum clear aperture D of the first side surface of the first lens corresponding to the maximum field of view angle of the optical lens may satisfy: 0.7 ≤ (D6 + D7) / 2 / D ≤ 1.5.

[0084] In one embodiment, the maximum light-passing aperture D6 of the second side of the third lens corresponding to the maximum field of view angle of the optical lens, the maximum light-passing aperture D7 of the first side of the fourth lens corresponding to the maximum field of view angle of the optical lens, and the maximum light-passing aperture D of the first side of the first lens corresponding to the maximum field of view angle of the optical lens satisfy: 0.85 ≤ (D6 + D7) / 2 / D ≤ 1.2.

[0085] On the other hand, the present application provides an electronic device. The electronic device includes an optical lens provided according to the present application and an imaging element for converting an optical image formed by the optical lens into an electrical signal.

[0086] The present application uses six lenses. By optimizing the shapes, focal powers, etc. of the lenses, the optical lens has at least one beneficial effect such as miniaturization, small aperture, long focal length, short back focal length, high resolution, high light flux, large angular resolution, low sensitivity, large aperture, small FNO, and low cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0087] In combination with the drawings, through the detailed description of the following embodiments, other features, objects, and advantages of the present application will become more obvious. In the drawings:

[0088] Figure 1 is a schematic structural diagram of the optical lens according to Embodiment 1 of the present application;

[0089] Figure 2 is a schematic structural diagram of the optical lens according to Embodiment 2 of the present application;

[0090] Figure 3 is a schematic structural diagram of the optical lens according to Embodiment 3 of the present application;

[0091] Figure 4 is a schematic structural diagram of the optical lens according to Embodiment 4 of the present application;

[0092] Figure 5 is a schematic structural diagram of the optical lens according to Embodiment 5 of the present application;

[0093] Figure 6 is a schematic structural diagram of the optical lens according to Embodiment 6 of the present application;

[0094] Figure 7 is a schematic structural diagram of the optical lens according to Embodiment 7 of the present application; and

[0095] Figure 8 is a schematic structural diagram of the optical lens according to Embodiment 8 of the present application. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0096] 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 the exemplary embodiments of the present application and do not limit the scope of the present application in any way. Throughout the specification, the same reference numerals refer to the same elements. The expression "and / or" includes any and all combinations of one or more of the associated listed items.

[0097] It should be noted that in this specification, the expressions such as 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 teachings of the present application, the first lens discussed below may also be referred to as the second lens or the third lens.

[0098] In the drawings, for ease of illustration, the thickness, size, and shape of the lens have been slightly exaggerated. Specifically, the spherical or aspherical shapes shown in the drawings are shown by way of example. That is, the spherical or aspherical shapes are not limited to the spherical or aspherical shapes shown in the drawings. The drawings are only examples and are not drawn to an exact scale.

[0099] In this document, the paraxial region refers to the region near the optical axis. If the lens surface is convex and the position of the convex surface is not defined, it means that the lens surface is convex at least in the paraxial region; if the lens surface is concave and the position of the concave surface is not defined, it means that the lens surface is concave at least in the paraxial region. The surface of each lens closest to the first side is called the first side surface of the lens, 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. Exemplarily, the first side may be the object side and the second side may be the image side; or, the first side may be the imaging side and the second side may be the image source side.

[0100] It should also be understood that the terms "comprise", "comprising", "have", "including" and / or "containing", 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 an expression such as "at least one of..." appears after a list of listed features, it modifies the entire list of listed features rather than an individual element in the list. In addition, when describing the embodiments of the present application, the use of "may" means "one or more embodiments of the present application". And, the term "exemplary" is intended to refer to an example or illustration.

[0101] Unless otherwise defined, all terms (including technical and scientific terms) used herein shall have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. It should also be understood that terms (such as those defined in a commonly used dictionary) shall be interpreted as having a meaning consistent with their meaning in the context of the relevant art, and will not be interpreted in an idealized or overly formal sense unless expressly so defined herein.

[0102] It should be noted that, without conflict, the embodiments in this application and the features in the embodiments may be combined with each other. The following will detail this application with reference to the drawings and in combination with the embodiments.

[0103] The features, principles, and other aspects of this application will be described in detail below.

[0104] In an exemplary embodiment, the optical lens may include, for example, six lenses with optical power, namely, a first lens, a second lens, a third lens, a fourth lens, a fifth lens, and a sixth lens. These six lenses are arranged in sequence along the optical axis from the first side to the second side.

[0105] In an exemplary embodiment, the optical lens provided in this application can be used as, for example, an imaging lens. At this time, the first side of the optical lens may be the object side, and the second side may be the image side. The light from the object side can form an image on the image side. The second side surface of the optical lens is the imaging surface of the optical lens.

[0106] In an exemplary embodiment, the optical lens provided in this application can be used as, for example, a projection lens or a lidar emission end lens. At this time, the second side of the optical lens may be the image source side, and the first side may be the imaging side. The light from the image source side can form an image on the imaging side. The second side surface of the optical lens is the image source surface of the optical lens.

[0107] 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 element (CMOS).

[0108] In an exemplary embodiment, an aperture for limiting the light beam may be provided between the fourth lens and the fifth lens to further improve the imaging quality of the optical lens. Setting the aperture between the fourth lens and the fifth lens is beneficial to effectively converge the light entering the optical lens, so that the light can smoothly transition between the fourth lens and the fifth lens, and then can smoothly transition to the rear end of the lens through the fifth lens and the sixth lens, which is beneficial to reduce the lens aperture at the rear end of the lens, adjust the telecentricity of the lens, and reduce the assembly sensitivity of the lens. In an embodiment of the present application, the aperture may be provided near the second side of the fourth lens; or, the aperture may be provided near the first side of the fifth lens. 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.

[0109] In an exemplary embodiment, the first lens may have a positive optical power. The first lens may have a convex-concave surface. Such an optical power and surface configuration of the first lens is conducive to collecting as much light as possible and allowing the light to enter the rear optical system, which is conducive to making the aperture larger, achieving a larger amount of light entering, and increasing the brightness of the image plane. In addition, the second side surface of the first lens is a concave surface, which can allow the light to enter the rear optical system as smoothly as possible, which is conducive to making the lens have characteristics such as low sensitivity and a small front aperture. The first side surface of the first lens is a convex surface, which is conducive to the sliding of water droplets in practical applications and reduces the impact of water droplets on imaging. Exemplarily, the material of the first lens may include a high refractive index material, which is conducive to reducing the front port diameter of the lens and improving the imaging quality.

[0110] In an exemplary embodiment, the second lens may have a negative optical power. The second lens may have a concave-convex surface. The second lens has a negative optical power, which is conducive to diverging light so as to disperse the central light and the edge light of each field of view. Under the same field of view angle, the light emitted through the second side of the second lens can enable the rear optical system to have a larger light receiving surface, which is conducive to expanding the physical aperture of the aperture, achieving a larger amount of light entering, and increasing the illumination of the picture. Exemplarily, the material of the second lens may include a high refractive index material, and the first side of the second lens is a concave surface, which is conducive to making the light present a divergent trend, weakening the convergence, so that the peripheral light can reach a higher imaging position, and is conducive to the use with the chip size. The second side of the second lens is a convex surface, which can effectively converge and gather light and reduce the diameter of the rear port.

[0111] In an exemplary embodiment, the third lens may have a positive focal power. The third lens may have a biconvex or convex-concave surface type. For example, in an exemplary embodiment, the third lens may have a biconvex surface type, which is beneficial for quickly converging the light passing through the third lens to the fourth lens and for effectively receiving the light from the second lens by the third lens, reducing the deflection of the light and the pressure on the fourth lens. In another exemplary embodiment, the third lens may have a convex-concave surface type, which is beneficial for appropriately diffusing the light passing through the third lens and for effectively receiving the diverging light from the second lens by the third lens, reducing the deflection of the light. In addition, the third lens is a meniscus-shaped lens, which is beneficial for converging the light passing through the third lens to the fourth lens to a certain extent. In the present application, the third lens can play a role in connecting the front and rear optical systems in the entire lens. Setting the third lens to have a biconvex or convex-concave surface type is beneficial for deflecting the light entering from the front optical system at a small angle, which can help correct aberrations better while reducing the sensitivity of the lens and improving the resolution.

[0112] In an exemplary embodiment, the fourth lens may have a positive focal power. The fourth lens may have a biconvex or convex-concave surface type. For example, in an exemplary embodiment, based on the fourth lens having a positive focal power, setting the fourth lens to have a biconvex surface type is beneficial for quickly converging the light and for quickly and smoothly allowing the light with a large front aperture to enter the rear optical system, which is beneficial for reducing the back focal length to a certain extent and then reducing the overall length of the lens. In another exemplary embodiment, based on the fourth lens having a positive focal power, setting the fourth lens to have a convex-concave surface type is beneficial for appropriately converging the light and for quickly and smoothly allowing the light with a large front aperture to enter the rear optical system, which is beneficial for reducing the back focal length to a certain extent and then reducing the overall length of the lens and reducing the sensitivity of the lens.

[0113] In an exemplary embodiment, the fifth lens may have a positive focal power. The fifth lens may have a convex-concave surface type. This setting of the focal power and surface type of the fifth lens is beneficial for quickly converging the light and for quickly and smoothly allowing the light with a large front aperture to enter the rear optical system, which is beneficial for reducing the back focal length to a certain extent and then reducing the overall length of the lens and improving the resolution.

[0114] In an exemplary embodiment, the sixth lens may have a positive focal power. The sixth lens may have a convex-concave surface type. This setting of the focal power and surface type of the sixth lens is beneficial for quickly converging the light. At the same time, the shape of the sixth lens is a meniscus shape (close to a concentric circle shape), which is beneficial for quickly and smoothly allowing the light with a large front aperture to enter the chip surface, which is beneficial for reducing the back focal length to a certain extent and then reducing the overall length of the lens and improving the resolution of the lens.

[0115] In an exemplary embodiment, the sixth lens may have a negative optical power. Its first side may be convex, for example, and its second side may be concave, for example. Such a setting of the optical power and surface shape of the sixth lens is conducive to the proper diffusion and smooth arrival of light to the image plane. The shape is meniscus (the shape is close to concentric circles), enabling a small CRA, allowing the light with a large front aperture to enter the chip surface quickly and smoothly, reducing the back focal length to a certain extent, thereby reducing the overall length of the system and improving the resolution ability of the optical system.

[0116] In an exemplary embodiment, the total length TTL of the optical lens according to the present application may be the distance from the center of the first side of the first lens to the second side of the optical lens on the optical axis. The back focal length BFL of the optical lens according to the present application may be the distance from the center of the second side of the sixth lens to the second side of the optical lens on the optical axis. The FOV related to the present application refers to the maximum field of view angle of the optical lens, which is associated with the image height H corresponding to the maximum field of view angle of the optical lens.

[0117] In an exemplary embodiment, the optical lens according to the present application may satisfy: TTL / H / FOV×180°≤90, which is conducive to realizing the miniaturization of the lens, where TTL is the total length of the optical lens, FOV is the maximum field of view angle of the optical lens, and H is the image height corresponding to the maximum field of view angle of the optical lens. More specifically, TTL, H, and FOV may further satisfy: 27≤TTL / H / FOV×180°≤63.

[0118] In an exemplary embodiment, the optical lens according to the present application may satisfy: 0≤D / H / θ≤9, which is conducive to enabling the lens to have characteristics such as a small aperture, where D is the maximum clear aperture of the first side of the first lens corresponding to the maximum field of view angle of the optical lens, H is the image height corresponding to the maximum field of view angle of the optical lens, and θ is the radian value of the maximum field of view angle of the optical lens. More specifically, D, H, and θ may further satisfy: 4.5≤D / H / θ≤7.5.

[0119] In an exemplary embodiment, the optical lens according to the present application may satisfy: D / H / F≤0.5mm -1 , which is conducive to enabling the lens to have characteristics such as a small aperture, where D is the maximum clear aperture of the first side of the first lens corresponding to the maximum field of view angle of the optical lens, H is the image height corresponding to the maximum field of view angle of the optical lens, and F is the total effective focal length of the optical lens. More specifically, D, H, and F may further satisfy: 0.1mm -1 ≤D / H / F≤0.35mm -1 .

[0120] In an exemplary embodiment, the optical lens according to the present application may satisfy: F×θ / D≥0.1, which is beneficial to endowing the lens with characteristics such as long focal length and small aperture. Wherein, F is the total effective focal length of the optical lens, θ is the radian value of the maximum field of view angle of the optical lens, and D is the maximum clear aperture of the first side of the first lens corresponding to the maximum field of view angle of the optical lens. More specifically, F, θ, and D may further satisfy: 0.1≤F×θ / D≤0.45. Specifically, by reasonably setting the relationship among F, θ, and D in the present application, it is beneficial to reduce the front aperture of the lens, reduce the imaging volume of the lens, and at the same time is beneficial to realizing the long-distance detection of the lens.

[0121] In an exemplary embodiment, the optical lens according to the present application may satisfy: BFL / TTL≤0.4, which is beneficial to making the back focal length of the lens shorter and the total length shorter. Wherein, BFL is the back focal length of the optical lens, and TTL is the total length of the optical lens. More specifically, BFL and TTL may further satisfy: 0.05≤BFL / TTL≤0.2. By reasonably setting the ratio of BFL and TTL in the present application, it is beneficial to realizing a smaller total length of the lens while meeting the special requirement of the short back focal length of the optical lens and ensuring the reserved space for component installation and focusing, and thus is beneficial to realizing the miniaturization of the lens.

[0122] In an exemplary embodiment, the optical lens according to the present application may satisfy: |F2 / F3|≤1.2, which is beneficial to improving the resolution of the lens. Wherein, F2 is the effective focal length of the second lens, and F3 is the effective focal length of the third lens. More specifically, F2 and F3 may further satisfy: 0.15≤|F2 / F3|≤1.8. By reasonably setting the ratio of F2 and F3 in the present application, it is beneficial to reasonably distribute the effective focal lengths of the second lens and the third lens, and is beneficial to making the second lens have an appropriate diverging effect on light, and then is beneficial to making the light passing through the second lens smoothly transition to the third lens and quickly converge after passing through the third lens, which is beneficial to reducing the sensitivity of the lens and improving the image quality.

[0123] In an exemplary embodiment, the optical lens according to the present application may satisfy: F / ENPD≤1.1, which is beneficial to reducing the F-number FNO of the lens and increasing the light transmission amount of the lens, making the lens have characteristics such as high light transmission amount. Wherein, ENPD is the entrance pupil diameter ENPD of the optical lens, and F is the total effective focal length of the optical lens. More specifically, F and ENPD may further satisfy: 0.5≤F / ENPD≤1.

[0124] In an exemplary embodiment, the optical lens according to the present application can satisfy: 1 ≤ F / H ≤ 2.5, which is beneficial to endowing the lens with characteristics such as high resolution. Herein, F is the total effective focal length of the optical lens, and H is the image height corresponding to the maximum field of view angle of the optical lens. More specifically, F and H can further satisfy: 1.5 ≤ F / H ≤ 2. By controlling the ratio of the focal length F to the image height H within a certain range to satisfy 1 ≤ F / H ≤ 2.5, the present application is beneficial to improving the resolution and avoiding abnormal conditions of the lens caused by overly exaggerated image height or focal length. Therefore, by reasonably setting the image height and the focal length, the present application can effectively improve the imaging quality of the optical lens.

[0125] In an exemplary embodiment, the optical lens according to the present application can satisfy: 0.5 ≤ (H / 2) / (F × tan(θ / 2)) ≤ 1.5, which is beneficial to endowing the lens with characteristics such as large angular resolution. Herein, H is the image height corresponding to the maximum field of view angle of the optical lens, F is the total effective focal length of the optical lens, and θ is the radian value of the maximum field of view angle of the optical lens. More specifically, H, F and θ can further satisfy: 0.7 ≤ (H / 2) / (F × tan(θ / 2)) ≤ 1.1. The conditional formula (H / 2) / (F × tan(θ / 2)) reflects the ratio of the actual image height to the ideal image height. By reasonably setting the ratio of the actual image height to the ideal image height, it is beneficial to achieve large angular resolution.

[0126] In an exemplary embodiment, the optical lens according to the present application can satisfy: TTL / F ≤ 6, which is beneficial to realizing the miniaturization of the lens. Herein, TTL is the total length of the optical lens, and F is the total effective focal length of the optical lens. More specifically, TTL and F can further satisfy: 3 ≤ TTL / F ≤ 4.5. By controlling the relationship between the total optical length and the total effective focal length of the optical lens, the present application can realize the characteristics of long focal length while realizing the miniaturization of the lens.

[0127] In an exemplary embodiment, the optical lens according to the present application can satisfy: F1 / F ≥ 2, which is beneficial to endowing the lens with characteristics such as high resolution. Herein, F1 is the effective focal length of the first lens, and F is the total effective focal length of the optical lens. More specifically, F1 and F can further satisfy: 6 ≤ F1 / F ≤ 10. Specifically, satisfying F1 / F ≥ 2 is beneficial not only to endowing the first lens with a positive optical power, which is conducive to converging light, but also to making the first lens a long focal length lens, which can ensure that more light enters the optical lens and enables the light to transition smoothly to the subsequent optical system.

[0128] In an exemplary embodiment, the optical lens according to the present application may satisfy: -5 ≤ F2 / F ≤ -0.5, which is beneficial for the lens to have characteristics such as high resolution. Here, F2 is the effective focal length of the second lens, and F is the total effective focal length of the optical lens. More specifically, F2 and F may further satisfy: -3 ≤ F2 / F ≤ -1. Specifically, satisfying -5 ≤ F2 / F ≤ -0.5 is beneficial for the second lens to have a negative optical power, which can better receive the light rays emitted from the first lens, enable the peripheral light rays entering from the first lens to transition smoothly, reduce sensitivity, and improve imaging quality. It is also beneficial for reasonably distributing the effective focal length of the second lens and facilitating the smooth entry of light rays into the optical lens.

[0129] In an exemplary embodiment, the optical lens according to the present application may satisfy: 2 ≤ F3 / F ≤ 12, which is beneficial for the lens to have characteristics such as high resolution. Here, F3 is the effective focal length of the third lens, and F is the total effective focal length of the optical lens. More specifically, F3 and F may further satisfy: 3 ≤ F3 / F ≤ 10. The third lens can play a role in receiving the front and rear optical systems in the entire lens. Satisfying 2 ≤ F3 / F ≤ 12 is beneficial for the light rays entering from the front optical system to be deflected at a small angle, which can better correct aberrations while reducing the sensitivity of the lens.

[0130] In an exemplary embodiment, the optical lens according to the present application may satisfy: 1 ≤ F4 / F ≤ 6, which is beneficial for the lens to have characteristics such as high resolution. Here, F4 is the effective focal length of the fourth lens, and F is the total effective focal length of the optical lens. More specifically, F4 and F may further satisfy: 2 ≤ F4 / F ≤ 5.5. Specifically, by setting the fourth lens to have a positive optical power and a relatively small focal length, it is beneficial for quickly converging light rays, improving resolution, and enabling the large-aperture light rays at the front end to smoothly enter the rear optical system, which is beneficial for reducing the back focal length to a certain extent and thus reducing the overall length of the lens.

[0131] In an exemplary embodiment, the optical lens according to the present application may satisfy: 0.5 ≤ F5 / F ≤ 6, which is beneficial for the lens to have characteristics such as high resolution. Here, F5 is the effective focal length of the fifth lens, and F is the total effective focal length of the optical lens. More specifically, F5 and F may further satisfy: 1 ≤ F5 / F ≤ 4.5. Specifically, by setting the fifth lens to have a positive optical power and a relatively small focal length, it is beneficial for quickly converging light rays, reducing the back focal length while improving resolution, and thus reducing the overall length of the lens. In the present application, the first side surface of the fourth lens may have a relatively small curvature radius, which is beneficial for enabling the large-aperture light rays at the front end to enter the rear optical system quickly and smoothly, which is beneficial for reducing the back focal length to a certain extent and thus reducing the overall length of the lens.

[0132] In an exemplary embodiment, the optical lens according to the present application may satisfy: 6 ≤ F6 / F ≤ 10, which is beneficial for the lens to have characteristics such as high resolution. Here, F6 is the effective focal length of the sixth lens, and F is the total effective focal length of the optical lens. More specifically, F6 and F may further satisfy: 6.5 ≤ F6 / F ≤ 9.5. Specifically, by reasonably setting the optical power of the sixth lens, it is beneficial to quickly converge light. At the same time, the shape of the sixth lens can be a meniscus shape (close to a concentric circle shape), which is beneficial for the light with a large front aperture to enter the chip surface quickly and smoothly, so as to reduce the back focal length to a certain extent and further reduce the total length of the lens.

[0133] In an exemplary embodiment, the optical lens according to the present application may satisfy: R2 / R3 ≤ 0, where R2 is the radius of curvature of the second surface of the first lens, and R3 is the radius of curvature of the first surface of the second lens. More specifically, R2 and R3 may further satisfy: -2.5 ≤ R2 / R3 ≤ -0.8. By reasonably setting the ratio of R2 and R3 in the present application, it is beneficial for the lens to have characteristics such as low sensitivity. Specifically, satisfying R2 / R3 ≤ 0 is beneficial for ensuring that when the light emitted from the first lens is incident on the first surface of the second lens, the incident light is relatively gentle, thereby facilitating the reduction of the tolerance sensitivity of the optical lens. Further, satisfying -2.5 ≤ R2 / R3 ≤ -0.8 is beneficial for making the values of R2 and R3 relatively close, and further beneficial for ensuring that when the light emitted from the first lens is incident on the first surface of the second lens, the incident light is relatively gentle, thereby facilitating the reduction of the tolerance sensitivity of the optical lens.

[0134] In an exemplary embodiment, the optical lens according to the present application may satisfy: R4 / F2 ≥ 2, where R4 is the radius of curvature of the second surface of the second lens, and F2 is the effective focal length of the second lens. More specifically, R4 and F2 may further satisfy: 2.5 ≤ R4 / F2 ≤ 6. By reasonably setting the ratio of R4 and F2 in the present application, it is beneficial for the lens to have characteristics such as low sensitivity. Specifically, satisfying R4 / F2 ≥ 2 is beneficial for making the second surface of the second lens convex on the basis of ensuring that the second lens has a negative optical power. This is not only beneficial for the large-angle peripheral light emitted by the second lens to enter the third lens and converge, improving the imaging quality, but also beneficial for making the divergent light emitted by the second lens have a gentle trend, reducing the sensitivity from the second lens to the third lens, and facilitating the reasonable entry of light into the subsequent optical system. Further, satisfying 2.5 ≤ R4 / F2 ≤ 6 is more beneficial for controlling the light trend between the second lens and the third lens, improving the imaging quality, reducing the sensitivity from the second lens to the third lens, and facilitating the reasonable entry of light into the subsequent optical system.

[0135] In an exemplary embodiment, the optical lens according to the present application can satisfy: D / DMAX ≤ 2, where D is the maximum clear aperture of the first side of the first lens corresponding to the maximum field of view angle of the optical lens, and DMAX is the maximum value among the maximum clear apertures from the first side of the first lens corresponding to the maximum field of view angle of the optical lens to the second side of the sixth lens. More specifically, D and DMAX can further satisfy: 0.6 ≤ D / DMAX ≤ 1.3. By reasonably setting the ratio of D and DMAX in the present application, it is beneficial for the lens to have characteristics such as a small aperture. Specifically, satisfying D / DMAX ≤ 2 is beneficial for reasonably controlling the front aperture of the first lens, beneficial for reducing the overall aperture of the lens, reducing the lens volume, and beneficial for reducing the situation where light suddenly drops sharply in the rear optical system, reducing the lens sensitivity. Further, satisfying 0.6 ≤ D / DMAX ≤ 1.3 is beneficial for controlling the front aperture of the first lens within a relatively small range, and thus the first lens can better play roles such as reducing the overall aperture of the lens, reducing the lens volume, and reducing the lens sensitivity.

[0136] In an exemplary embodiment, the optical lens according to the present application can satisfy: 0.6 ≤ R1 / R2 ≤ 1, where R1 is the radius of curvature of the first side of the first lens, and R2 is the radius of curvature of the second side of the first lens. More specifically, R1 and R2 can further satisfy: 0.7 ≤ R1 / R2 ≤ 0.85. By reasonably setting the ratio of R1 and R2 in the present application, it is beneficial for the lens to have characteristics such as a large aperture. Specifically, satisfying 0.6 ≤ R1 / R2 ≤ 1 is beneficial for the first lens to be a meniscus lens, and beneficial for the radius of curvature of the first side of the first lens to be smaller than that of the second side, and thus it is beneficial for light with a large aperture to enter the first lens smoothly, and thus it is beneficial for the lens to have characteristics such as a small FNO and a large aperture. Further, satisfying 0.7 ≤ R1 / R2 ≤ 0.85 can further optimize the ratio of R1 and R2, making the radius of curvature of the first side of the first lens smaller, and thus the light incident amount on the first side of the first lens can be increased, which is beneficial for the lens to have characteristics such as a small FNO and a large aperture on the basis of ensuring that light with a large aperture enters the first lens smoothly.

[0137] In an exemplary embodiment, the optical lens according to the present application may satisfy: |R5 / R6| ≤ 4.5, where R5 is the radius of curvature of the first side surface of the third lens, and R6 is the radius of curvature of the second side surface of the third lens. More specifically, R5 and R6 may further satisfy: 0.9 ≤ |R5 / R6| ≤ 3.5. By reasonably setting the ratio of R5 and R6, the present application is conducive to enabling the lens to have characteristics such as low sensitivity and high resolution. Specifically, satisfying |R5 / R6| ≤ 4.5 is conducive to enabling the third lens to better receive the divergent light emitted from the second lens, enabling the light in the third lens to transition smoothly and enter the rear-end optical system, which is conducive to reducing the sensitivity of the lens while better correcting the optical path difference and improving the resolution. Further, satisfying 0.9 ≤ |R5 / R6| ≤ 3.5 is conducive to controlling the radii of curvature of the first side surface and the second side surface of the third lens within a relatively small range, thereby enabling the third lens to better play roles such as receiving divergent light, flattening the light trend, and correcting the optical path difference.

[0138] In an exemplary embodiment, the optical lens according to the present application may satisfy: 0.2 ≤ D / TTL ≤ 0.6, where D is the maximum light passing aperture of the first side surface of the first lens corresponding to the maximum field of view angle of the optical lens, and TTL is the total length of the optical lens. More specifically, D and TTL may further satisfy: 0.35 ≤ D / TTL ≤ 0.5. By reasonably setting the ratio of D and TTL, the present application is conducive to enabling the lens to have characteristics such as miniaturization. Specifically, satisfying 0.2 ≤ D / TTL ≤ 0.6 is conducive to reasonably controlling the front aperture of the first lens, conducive to reducing the overall total length of the lens, reducing the volume of the lens, and achieving miniaturization. Further, satisfying 0.35 ≤ D / TTL ≤ 0.5 is conducive to further optimizing the optical technical parameter D / TTL and better achieving the purpose of reducing the total length of the lens and reducing the volume of the lens.

[0139] In an exemplary embodiment, the optical lens according to the present application can satisfy: 0.6 ≤ R12 / R13 ≤ 1.5, where R12 is the radius of curvature of the first side surface of the sixth lens, and R13 is the radius of curvature of the second side surface of the sixth lens. More specifically, R12 and R13 can further satisfy: 0.95 ≤ R12 / R13 ≤ 1.2. By reasonably setting the ratio of R12 and R13, the present application is beneficial to endowing the lens with characteristics such as high resolution and small FNO. Specifically, satisfying 0.6 ≤ R12 / R13 ≤ 1.5 is beneficial to controlling the radii of curvature of the first side surface and the second side surface of the sixth lens within a reasonable range, making the overall shape of the sixth lens tend to a concentric circle shape, which helps large-aperture light to quickly converge onto the image plane, achieving a small FNO, and at the same time is beneficial to correcting the optical path difference of the rear-end system and improving the resolution. Further, satisfying 0.95 ≤ R12 / R13 ≤ 1.2 is beneficial to making the radii of curvature of the first side surface and the second side surface of the sixth lens close to each other, and then the shape of the sixth lens can be closer to a concentric circle, enabling the sixth lens to better play its role.

[0140] In an exemplary embodiment, the optical lens according to the present application can satisfy: 1.6 ≤ R12 / BFL ≤ 2.5, where R12 is the radius of curvature of the first side surface of the sixth lens, and BFL is the back focal length of the optical lens. More specifically, R12 and BFL can further satisfy: 1.8 ≤ R12 / BFL ≤ 2.3. By reasonably setting the ratio of R12 and BFL, the present application is beneficial to endowing the lens with characteristics such as high resolution and miniaturization. Specifically, satisfying 1.6 ≤ R12 / BFL ≤ 2.5 is beneficial to making the radius of curvature of the first side surface of the sixth lens smaller, enabling light to smoothly transition to the rear-end optical system. While improving the resolution, it is beneficial to reducing the back focal length and achieving the miniaturization of the lens. Further, satisfying 1.8 ≤ R12 / BFL ≤ 2.3 can further optimize the optical parameter R12 / BFL, reasonably control the light trend in the lens, and while improving the resolution, it is beneficial to reducing the back focal length and achieving the miniaturization of the lens.

[0141] In an exemplary embodiment, the optical lens according to the present application may satisfy: 0.7 ≤ (D6 + D7) / 2 / D ≤ 1.5, where D6 is the maximum clear aperture of the second side of the third lens corresponding to the maximum field of view angle of the optical lens, D7 is the maximum clear aperture of the first side of the fourth lens corresponding to the maximum field of view angle of the optical lens, and D is the maximum clear aperture of the first side of the first lens corresponding to the maximum field of view angle of the optical lens. More specifically, D6, D7, and D may further satisfy: 0.85 ≤ (D6 + D7) / 2 / D ≤ 1.2. By reasonably setting the relationship between D6, D7, and D in the present application, it is beneficial for the lens to have characteristics such as low sensitivity and small FNO. Specifically, satisfying 0.7 ≤ (D6 + D7) / 2 / D ≤ 1.5 is beneficial for reasonably controlling the apertures of the first sides of the third lens and the fourth lens, enabling the third lens and the fourth lens to effectively receive the large-aperture light from the front and smoothly transition the light to the rear, which is beneficial for reducing the lens sensitivity while achieving a small FNO. Further, satisfying 0.85 ≤ (D6 + D7) / 2 / D ≤ 1.2 can further optimize the optical parameter (D6 + D7) / 2 / D, enabling the third lens and the fourth lens to better play roles such as receiving the light from the front and smoothly emitting the light.

[0142] In an exemplary embodiment, if necessary, the optical lens of the present application may further include a filter and / or a protective glass disposed between the sixth lens and the second side of the optical lens to filter light with different wavelengths and prevent damage to the components (such as chips) on the second side of the optical lens.

[0143] In an exemplary embodiment, the first lens to the sixth lens may be spherical lenses or aspherical lenses. Exemplarily, the sixth lens may be an aspherical lens and at least one of the third lens, the fourth lens, and the fifth lens may be an aspherical lens, and the other lenses may be spherical lenses. The present application does not specifically limit the specific number of spherical lenses and aspherical lenses. When focusing on reflecting the imaging quality, the number of aspherical lenses can be increased. In particular, in order to improve the resolution quality of the optical lens, the first lens, the second lens, the third lens, the fourth lens, the fifth lens, and the sixth lens may all be aspherical lenses. The characteristic of an aspherical lens is that the curvature continuously changes from the center to the periphery of the lens. Different from a spherical lens with a constant curvature from the center to the periphery of the lens, an aspherical lens has better curvature radius characteristics and has the advantages of improving distortion aberration and improving astigmatism aberration. After using an aspherical lens, it is possible to eliminate the aberration that appears during imaging as much as possible, thereby improving the imaging quality of the lens. The setting of the aspherical lens helps to correct the system aberration and improve the resolution.

[0144] In an exemplary embodiment, the curvature of each position of the aspherical surface is different, which can effectively correct aberration and field curvature and improve the resolution of the optical lens. The fifth lens and / or the sixth lens can be an aspherical lens. For example, if the fifth lens is aspherical, it can effectively receive light with a large aperture at the end and improve the resolution of the optical lens. If the sixth lens is aspherical, it can effectively receive light with a large aperture at the end and quickly enter the chip surface, and then can directly and effectively control the final aberration, achieving high resolution while ensuring miniaturization.

[0145] Through the reasonable setting of the shape and optical power of each lens, the optical lens according to the above embodiment of the present application can achieve at least one beneficial effect such as miniaturization, small aperture, long focal length, short back focal length, high resolution, high light throughput, large angular resolution, low sensitivity, small FNO, low cost, and good imaging quality with only 6 lenses. When used in high and low temperature environments, the optical lens can also well control the back focal shift, so the optical lens can adapt to more severe use environments; at the same time, the optical lens is also conducive to significantly reducing the total length of the optical lens, realizing lens miniaturization, and facilitating assembly in limited spaces in some special fields.

[0146] In an exemplary embodiment, the first lens, the second lens, the third lens, the fourth lens, the fifth lens, and the sixth lens can all be glass lenses. The optical lens made of glass can suppress the shift of the back focal length of the optical lens with temperature change to improve system stability. At the same time, using glass material can avoid the blurring of the lens imaging caused by the high and low temperature changes in the use environment, affecting the normal use of the lens. Specifically, when focusing on resolution quality and reliability, the first lens to the sixth lens can all be glass aspherical lenses. Of course, in application scenarios with lower temperature stability requirements, the first lens to the sixth lens in the optical lens can also all be made of plastic. Making the optical lens with plastic can effectively reduce the manufacturing cost. Of course, the first lens to the sixth lens in the optical lens can also be made of a combination of plastic and glass.

[0147] However, those skilled in the art should understand that without departing from the technical solution claimed in the present application, the number of lenses constituting the lens can be changed to obtain the various results and advantages described in this specification. For example, although 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 can also include other numbers of lenses. The following further describes specific embodiments of the optical lens applicable to the above embodiments with reference to the drawings.

[0148] Example 1

[0149] The following refers to Figure 1 describes the optical lens according to Embodiment 1 of the present application.Figure 1 The structural schematic diagram of an optical lens according to Embodiment 1 of the present application is shown.

[0150] As Figure 1 shown, the optical lens sequentially 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 along the optical axis from the first side to the second side.

[0151] The first lens L1 is a convex-concave lens with a positive optical power, its first side S1 is a convex surface, and its second side S2 is a concave surface. The second lens L2 is a concave-convex lens with a negative optical power, its first side S3 is a concave surface, and its second side S4 is a convex surface. The third lens L3 is a convex-convex lens with a positive optical power, its first side S5 is a convex surface, and its second side S6 is a convex surface. The fourth lens L4 is a convex-convex lens with a positive optical power, its first side S7 is a convex surface, and its second side S8 is a convex surface. The fifth lens L5 is a convex-concave lens with a positive optical power, its first side S10 is a convex surface, and its second side S11 is a concave surface. The sixth lens L6 is a convex-concave lens with a positive optical power, its first side S12 is a convex surface, and its second side S13 is a concave surface.

[0152] The optical lens may further include a stop STO, and the stop STO may be disposed between the fourth lens L4 and the fifth lens L5 to improve the imaging quality. For example, the stop STO may be disposed at a position close to the first side S10 of the fifth lens L5 between the fourth lens L4 and the fifth lens L5.

[0153] Optionally, the optical lens may further include a filter L7 having a first side S14 and a second side S15. The filter L7 can be used to correct color deviation. Optionally, the optical lens may further include a protective glass L8 having a first side S16 and a second side S17. The protective glass L8 can be used to protect the image sensing chip IMA located at the second side.

[0154] The optical lens provided by the present application can be used as, for example, an imaging lens. At this time, light from an object sequentially passes through each surface S1 to S17 and finally forms an image on the second side (i.e., the imaging surface) provided on the second side, where an image sensing chip IMA is disposed. It should be understood that the optical lens provided by the present application can also be used as, for example, a projection lens or a lidar emission end lens. At this time, light from the image source side sequentially passes through each surface S17 to S1 and finally projects onto the first side (i.e., the projection surface, not shown) provided on the first side, where an image sensing chip IMA is disposed.

[0155] Table 1 shows the radius of curvature R, thickness / distance T (it should be understood that the thickness / distance T in the row where S1 is located is the central thickness T1 of the first lens L1, the thickness / distance T in the row where S2 is located is the spacing distance T12 between the first lens L1 and the second lens L2, and so on), refractive index Nd, and Abbe number Vd of each lens of the optical lens of Example 1.

[0156]

[0157] Table 1

[0158] In Example 1, both the first side S12 and the second side S13 of the sixth lens L6 are aspherical surfaces. The surface profile z of each aspherical lens can be defined by, but not limited to, the following aspherical formula:

[0159]

[0160] where z is the sagitta, the distance from the vertex of the aspherical surface to the aspherical surface along the optical axis at a position with a height of h; c is the paraxial curvature of the aspherical surface, c = 1 / R (that is, the paraxial curvature c is the reciprocal of the radius of curvature R in Table 1 above); k is the conic coefficient; A, B, C, D, and E are all high-order term coefficients. Table 2 below gives the conic coefficient k and high-order term coefficients A, B, C, D, and E of the aspherical surfaces S12 and S13 that can be used in Example 1.

[0161]

[0162] Table 2

[0163] Example 2

[0164] The following refers to Figure 2 describes the optical lens according to Embodiment 2 of the present application. In this embodiment and the following embodiments, for the sake of simplicity, some descriptions similar to those in Example 1 will be omitted. Figure 2 shows a schematic structural diagram of the optical lens according to Embodiment 2 of the present application.

[0165] As Figure 2 shown, the optical lens sequentially 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 along the optical axis from the first side to the second side.

[0166] The first lens L1 is a convex-concave lens with a positive optical power. Its first side S1 is a convex surface, and its second side S2 is a concave surface. The second lens L2 is a concave-convex lens with a negative optical power. Its first side S3 is a concave surface, and its second side S4 is a convex surface. The third lens L3 is a convex-convex lens with a positive optical power. Its first side S5 is a convex surface, and its second side S6 is a convex surface. The fourth lens L4 is a convex-concave lens with a positive optical power. Its first side S7 is a convex surface, and its second side S8 is a concave surface. The fifth lens L5 is a convex-concave lens with a positive optical power. Its first side S10 is a convex surface, and its second side S11 is a concave surface. The sixth lens L6 is a convex-concave lens with a positive optical power. Its first side S12 is a convex surface, and its second side S13 is a concave surface.

[0167] The optical lens may further include a diaphragm STO. The diaphragm STO can be disposed between the fourth lens L4 and the fifth lens L5 to improve the imaging quality. For example, the diaphragm STO can be disposed at a position close to the first side S10 of the fifth lens L5 between the fourth lens L4 and the fifth lens L5.

[0168] Optionally, the optical lens may further include a filter L7 having a first side S14 and a second side S15. The filter L7 can be used to correct color deviation. Optionally, the optical lens may further include a protective glass L8 having a first side S16 and a second side S17. The protective glass L8 can be used to protect the image sensing chip IMA located at the second side.

[0169] The optical lens provided in the present application can be used as, for example, an imaging lens. At this time, the light from the object sequentially passes through the surfaces S1 to S17 and finally forms an image on the second side (i.e., the imaging surface) provided at the second side, where an image sensing chip IMA is disposed. It should be understood that the optical lens provided in the present application can also be used as, for example, a projection lens or a lidar transmitting end lens. At this time, the light from the image source side sequentially passes through the surfaces S17 to S1 and finally projects onto the first side (i.e., the projection surface, not shown) provided at the first side, where an image sensing chip IMA is disposed at the image source surface.

[0170] Table 3 shows the radius of curvature R, thickness / distance T, refractive index Nd, and Abbe number Vd of each lens of the optical lens in Embodiment 2.

[0171]

[0172]

[0173] Table 3

[0174] In Embodiment 2, both the first side surface S12 and the second side surface S13 of the sixth lens L6 are aspherical surfaces. Table 4 below gives the conic coefficient k and the higher-order term coefficients A, B, C, D, and E of the aspherical mirror surfaces S12 and S13 that can be used in Embodiment 2.

[0175] Surface number k A B C D E S12 -0.4303 -4.9602E-06 1.3676E-07 -2.9733E-09 4.6834E-11 -2.6917E-13 S13 2.5858 1.9658E-04 -6.7172E-06 6.0209E-07 -1.8077E-08 2.5081E-10

[0176] Table 4

[0177] Example 3

[0178] The following refers to Figure 3 an optical lens according to Embodiment 3 of the present application. Figure 3 FIG. shows a schematic structural diagram of the optical lens according to Embodiment 3 of the present application.

[0179] As Figure 3 shown, the optical lens sequentially 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 along the optical axis from the first side to the second side.

[0180] The first lens L1 is a convex-concave lens with a positive optical power, its first side surface S1 is a convex surface, and its second side surface S2 is a concave surface. The second lens L2 is a concave-convex lens with a negative optical power, its first side surface S3 is a concave surface, and its second side surface S4 is a convex surface. The third lens L3 is a concave-convex lens with a positive optical power, its first side surface S5 is a concave surface, and its second side surface S6 is a convex surface. The fourth lens L4 is a convex-convex lens with a positive optical power, its first side surface S7 is a convex surface, and its second side surface S8 is a convex surface. The fifth lens L5 is a convex-concave lens with a positive optical power, its first side surface S10 is a convex surface, and its second side surface S11 is a concave surface. The sixth lens L6 is a convex-concave lens with a positive optical power, its first side surface S12 is a convex surface, and its second side surface S13 is a concave surface.

[0181] The optical lens may further include a diaphragm STO, and the diaphragm STO may be disposed between the fourth lens L4 and the fifth lens L5 to improve the imaging quality. For example, the diaphragm STO may be disposed at a position close to the first side surface S10 of the fifth lens L5 between the fourth lens L4 and the fifth lens L5.

[0182] Optionally, the optical lens may further include a filter L7 having a first side surface S14 and a second side surface S15. The filter L7 can be used to correct color deviation. Optionally, the optical lens may further include a protective glass L8 having a first side surface S16 and a second side surface S17. The protective glass L8 can be used to protect the image sensing chip IMA located at the second side surface.

[0183] The optical lens provided by the present application can be used as, for example, an imaging lens. In this case, light from an object sequentially passes through each surface S1 to S17 and finally forms an image on the second side surface (i.e., the imaging surface) provided on the second side, where an image sensing chip IMA is provided at the imaging surface. It should be understood that the optical lens provided by the present application can also be used as, for example, a projection lens or a lidar transmitting end lens. In this case, light from the image source side sequentially passes through each surface S17 to S1 and finally projects onto the first side surface (i.e., the projection surface, not shown) provided on the first side, where an image sensing chip IMA is provided at the image source surface.

[0184] Table 5 shows the curvature radius R, thickness / distance T, refractive index Nd, and Abbe number Vd of each lens of the optical lens of Example 3.

[0185]

[0186] Table 5

[0187] In Example 3, both the first side surface S12 and the second side surface S13 of the sixth lens L6 are aspherical surfaces. Table 6 below gives the conic coefficient k and the higher-order term coefficients A, B, C, D, and E of the aspherical surfaces S12 and S13 that can be used in Example 3.

[0188] Surface number k A B C D E S12 -0.0978 1.1931E-06 4.5802E-08 -1.1187E-09 1.6464E-11 -7.7347E-14 S13 4.3961 1.2996E-04 -8.3192E-06 5.5382E-07 -1.6064E-08 1.8027E-10

[0189] Table 6

[0190] Example 4

[0191] The following refers to Figure 4 describes the optical lens according to Embodiment 4 of the present application. Figure 4 shows a schematic structural diagram of the optical lens according to Embodiment 4 of the present application.

[0192] As Figure 4 shown, the optical lens sequentially 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 along the optical axis from the first side to the second side.

[0193] The first lens L1 is a convex-concave lens with a positive focal power, its first side S1 is a convex surface, and its second side S2 is a concave surface. The second lens L2 is a concave-convex lens with a negative focal power, its first side S3 is a concave surface, and its second side S4 is a convex surface. The third lens L3 is a concave-convex lens with a positive focal power, its first side S5 is a concave surface, and its second side S6 is a convex surface. The fourth lens L4 is a convex-concave lens with a positive focal power, its first side S7 is a convex surface, and its second side S8 is a concave surface. The fifth lens L5 is a convex-concave lens with a positive focal power, its first side S10 is a convex surface, and its second side S11 is a concave surface. The sixth lens L6 is a convex-concave lens with a positive focal power, its first side S12 is a convex surface, and its second side S13 is a concave surface.

[0194] The optical lens may further include a diaphragm STO, and the diaphragm STO can be disposed between the fourth lens L4 and the fifth lens L5 to improve the imaging quality. For example, the diaphragm STO can be disposed at a position close to the first side S10 of the fifth lens L5 between the fourth lens L4 and the fifth lens L5.

[0195] Optionally, the optical lens may further include a filter L7 having a first side S14 and a second side S15. The filter L7 can be used to correct color deviation. Optionally, the optical lens may further include a protective glass L8 having a first side S16 and a second side S17. The protective glass L8 can be used to protect the image sensing chip IMA located at the second side.

[0196] The optical lens provided by this application can be used as, for example, an imaging lens. At this time, the light from the object sequentially passes through each surface S1 to S17 and finally forms an image on the second side (i.e., the imaging surface) provided at the second side, where an image sensing chip IMA is provided at the imaging surface. It should be understood that the optical lens provided by this application can also be used as, for example, a projection lens or a lidar transmitting end lens. At this time, the light from the image source side sequentially passes through each surface S17 to S1 and finally projects onto the first side (i.e., the projection surface, not shown) provided at the first side, where an image sensing chip IMA is provided at the image source surface.

[0197] Table 7 shows the radius of curvature R, thickness / distance T, refractive index Nd, and Abbe number Vd of each lens of the optical lens of Example 4.

[0198]

[0199]

[0200] Table 7

[0201] In Embodiment 4, both the first side S12 and the second side S13 of the sixth lens L6 are aspherical surfaces. Table 8 below gives the conic coefficient k and the higher-order term coefficients A, B, C, D, and E of the aspherical mirror surfaces S12 and S13 that can be used in Embodiment 4.

[0202] Surface number k A B C D E S12 -0.6876 -1.0098E-05 -2.2420E-09 2.2885E-10 -2.7154E-12 1.5569E-14 S13 4.4511 1.6228E-04 -9.3574E-06 5.4817E-07 -1.3801E-08 1.3889E-10

[0203] Table 8

[0204] Example 5

[0205] The following refers to Figure 5 an optical lens according to Embodiment 5 of the present application. Figure 5 FIG. shows a schematic structural diagram of an optical lens according to Embodiment 5 of the present application.

[0206] As Figure 5 shown, the optical lens sequentially 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 along the optical axis from the first side to the second side.

[0207] The first lens L1 is a convex-concave lens with a positive optical power, its first side S1 is a convex surface, and its second side S2 is a concave surface. The second lens L2 is a concave-convex lens with a negative optical power, its first side S3 is a concave surface, and its second side S4 is a convex surface. The third lens L3 is a convex-convex lens with a positive optical power, its first side S5 is a convex surface, and its second side S6 is a convex surface. The fourth lens L4 is a convex-convex lens with a positive optical power, its first side S7 is a convex surface, and its second side S8 is a convex surface. The fifth lens L5 is a convex-concave lens with a positive optical power, its first side S10 is a convex surface, and its second side S11 is a concave surface. The sixth lens L6 is a convex-concave lens with a positive optical power, its first side S12 is a convex surface, and its second side S13 is a concave surface.

[0208] The optical lens may further include a diaphragm STO, and the diaphragm STO may be disposed between the fourth lens L4 and the fifth lens L5 to improve the imaging quality. For example, the diaphragm STO may be disposed at a position close to the first side S10 of the fifth lens L5 between the fourth lens L4 and the fifth lens L5.

[0209] Optionally, the optical lens may further include a filter L7 having a first side S14 and a second side S15. The filter L7 can be used to correct color deviation. Optionally, the optical lens may further include a protective glass L8 having a first side S16 and a second side S17. The protective glass L8 can be used to protect the image sensing chip IMA located at the second side.

[0210] The optical lens provided by this application can be used as, for example, an imaging lens. In this case, light from an object sequentially passes through each surface S1 to S17 and finally forms an image on the second side surface (i.e., the imaging surface) provided on the second side, where an image sensing chip IMA is provided at the imaging surface. It should be understood that the optical lens provided by this application can also be used as, for example, a projection lens or a lidar emission end lens. In this case, light from the image source side sequentially passes through each surface S17 to S1 and finally projects onto the first side surface (i.e., the projection surface, not shown) provided on the first side, where an image sensing chip IMA is provided at the image source surface.

[0211] Table 9 shows the curvature radius R, thickness / distance T, refractive index Nd, and Abbe number Vd of each lens of the optical lens of Example 5.

[0212]

[0213] Table 9

[0214] In Example 5, the first side surface and the second side surface of the fifth lens L5 and the sixth lens L6 are both aspherical surfaces. Table 10 below gives the conic coefficient k and the high-order term coefficients A, B, C, D, and E of the aspherical mirror surfaces S10, S11, S12, and S13 that can be used in Example 5.

[0215] Surface number k A B C D E S10 0.0061 1.3102E-07 -4.4565E-10 3.2568E-12 1.4339E-14 -3.5805E-18 S11 -0.0607 3.7438E-07 3.0895E-09 1.2639E-11 6.4312E-15 -5.3739E-16 S12 0.3172 -3.2549E-05 5.1560E-07 -1.0164E-08 7.6334E-11 -2.6565E-13 S13 -0.4602 3.3505E-04 -9.9404E-06 6.6577E-07 -1.6578E-08 1.8225E-10

[0216] Table 10

[0217] Example 6

[0218] The following refers to Figure 6 describes the optical lens according to Embodiment 6 of this application. Figure 6 shows a schematic structural diagram of the optical lens according to Embodiment 6 of this application.

[0219] As Figure 6 shown, the optical lens sequentially 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 along the optical axis from the first side to the second side.

[0220] The first lens L1 is a convex-concave lens with a positive optical power. Its first side S1 is a convex surface, and its second side S2 is a concave surface. The second lens L2 is a concave-convex lens with a negative optical power. Its first side S3 is a concave surface, and its second side S4 is a convex surface. The third lens L3 is a convex-convex lens with a positive optical power. Its first side S5 is a convex surface, and its second side S6 is a convex surface. The fourth lens L4 is a convex-concave lens with a positive optical power. Its first side S7 is a convex surface, and its second side S8 is a concave surface. The fifth lens L5 is a convex-concave lens with a positive optical power. Its first side S10 is a convex surface, and its second side S11 is a concave surface. The sixth lens L6 is a convex-concave lens with a positive optical power. Its first side S12 is a convex surface, and its second side S13 is a concave surface.

[0221] The optical lens may further include a diaphragm STO. The diaphragm STO may be disposed between the fourth lens L4 and the fifth lens L5 to improve the imaging quality. For example, the diaphragm STO may be disposed at a position close to the first side S10 of the fifth lens L5 between the fourth lens L4 and the fifth lens L5.

[0222] Optionally, the optical lens may further include a filter L7 having a first side S14 and a second side S15. The filter L7 can be used to correct color deviation. Optionally, the optical lens may further include a protective glass L8 having a first side S16 and a second side S17. The protective glass L8 can be used to protect the image sensing chip IMA located at the second side.

[0223] The optical lens provided in this application can be used as, for example, an imaging lens. At this time, the light from the object sequentially passes through the surfaces S1 to S17 and finally forms an image on the second side (i.e., the imaging surface) provided on the second side, where an image sensing chip IMA is provided. It should be understood that the optical lens provided in this application can also be used as, for example, a projection lens or a lidar transmitting end lens. At this time, the light from the image source side sequentially passes through the surfaces S17 to S1 and finally projects onto the first side (i.e., the projection surface, not shown) provided on the first side, where an image sensing chip IMA is provided.

[0224] Table 11 shows the radius of curvature R, thickness / distance T, refractive index Nd, and Abbe number Vd of each lens of the optical lens of Example 6.

[0225]

[0226]

[0227] Table 11

[0228] In Embodiment 6, the first and second sides of the fourth lens L4 and the sixth lens L6 are both aspherical surfaces. Table 12 below gives the conic coefficients k and the higher-order coefficients A, B, C, D, and E of the aspherical surfaces S7, S8, S12, and S13 that can be used in Embodiment 6.

[0229] Surface number k A B C D E S7 0.0197 -3.1083E-07 1.0006E-10 -3.3544E-13 6.3098E-15 6.1889E-17 S8 0.1926 2.8511E-07 8.8021E-10 1.9713E-11 4.6551E-14 -1.8758E-16 S12 -0.2291 -8.1139E-07 1.9604E-07 -2.0094E-09 2.4565E-11 -1.0303E-13 S13 3.0446 1.7505E-04 -8.1480E-06 4.5523E-07 -1.0749E-08 1.0739E-10

[0230] Table 12

[0231] Example 7

[0232] The following refers to Figure 7 an optical lens according to Embodiment 7 of the present application. Figure 7 FIG. shows a schematic structural diagram of the optical lens according to Embodiment 7 of the present application.

[0233] As Figure 7 shown, the optical lens sequentially 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 along the optical axis from the first side to the second side.

[0234] The first lens L1 is a convex-concave lens with a positive optical power, its first side S1 is a convex surface, and its second side S2 is a concave surface. The second lens L2 is a concave-convex lens with a negative optical power, its first side S3 is a concave surface, and its second side S4 is a convex surface. The third lens L3 is a concave-convex lens with a positive optical power, its first side S5 is a concave surface, and its second side S6 is a convex surface. The fourth lens L4 is a convex-convex lens with a positive optical power, its first side S7 is a convex surface, and its second side S8 is a convex surface. The fifth lens L5 is a convex-concave lens with a positive optical power, its first side S10 is a convex surface, and its second side S11 is a concave surface. The sixth lens L6 is a convex-concave lens with a positive optical power, its first side S12 is a convex surface, and its second side S13 is a concave surface.

[0235] The optical lens may further include a diaphragm STO, and the diaphragm STO may be disposed between the fourth lens L4 and the fifth lens L5 to improve the imaging quality. For example, the diaphragm STO may be disposed at a position close to the first side S10 of the fifth lens L5 between the fourth lens L4 and the fifth lens L5.

[0236] Optionally, the optical lens may further include a filter L7 having a first side S14 and a second side S15. The filter L7 can be used to correct color deviation. Optionally, the optical lens may further include a protective glass L8 having a first side S16 and a second side S17. The protective glass L8 can be used to protect the image sensing chip IMA located at the second side.

[0237] The optical lens provided by the present application can be used as, for example, an imaging lens. In this case, light from an object sequentially passes through each surface S1 to S17 and finally forms an image on the second side surface (i.e., the imaging surface) provided on the second side, where an image sensing chip IMA is provided at the imaging surface. It should be understood that the optical lens provided by the present application can also be used as, for example, a projection lens or a lidar transmitting end lens. In this case, light from the image source side sequentially passes through each surface S17 to S1 and finally projects onto the first side surface (i.e., the projection surface, not shown) provided on the first side, where an image sensing chip IMA is provided at the image source surface.

[0238] Table 13 shows the radius of curvature R, thickness / distance T, refractive index Nd, and Abbe number Vd of each lens of the optical lens of Example 7.

[0239]

[0240] Table 13

[0241] In Example 7, the first side surface and the second side surface of the fourth lens L4 and the sixth lens L6 are both aspherical surfaces. Table 14 below gives the conic coefficient k and the higher-order term coefficients A, B, C, D, and E of the aspherical mirror surfaces S7, S8, S12, and S13 that can be used in Example 7.

[0242] Surface number k A B C D E S7 -1.0654 -6.2690E-07 -1.6213E-10 -4.1940E-13 -8.9263E-15 -2.9797E-17 S8 -7.0772 2.9428E-07 -5.4498E-10 -5.2541E-12 -8.7579E-15 -1.5229E-17 S12 0.2272 6.1723E-07 1.5078E-07 -1.3832E-09 7.1029E-12 -9.4724E-15 S13 4.2688 1.9111E-04 -9.6006E-06 4.3574E-07 -8.9768E-09 7.5716E-11

[0243] Table 14

[0244] Example 8

[0245] The following refers to Figure 8 and describes the optical lens according to Embodiment 8 of the present application. Figure 8 Fig. shows a schematic structural diagram of the optical lens according to Embodiment 8 of the present application.

[0246] As Figure 8 shown, the optical lens sequentially 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 along the optical axis from the first side to the second side.

[0247] The first lens L1 is a convex-concave lens with a positive focal power, its first side S1 is a convex surface, and its second side S2 is a concave surface. The second lens L2 is a concave-convex lens with a negative focal power, its first side S3 is a concave surface, and its second side S4 is a convex surface. The third lens L3 is a concave-convex lens with a positive focal power, its first side S5 is a concave surface, and its second side S6 is a convex surface. The fourth lens L4 is a convex-concave lens with a positive focal power, its first side S7 is a convex surface, and its second side S8 is a concave surface. The fifth lens L5 is a convex-concave lens with a positive focal power, its first side S10 is a convex surface, and its second side S11 is a concave surface. The sixth lens L6 is a convex-concave lens with a positive focal power, its first side S12 is a convex surface, and its second side S13 is a concave surface.

[0248] The optical lens may further include a diaphragm STO, and the diaphragm STO may be disposed between the fourth lens L4 and the fifth lens L5 to improve the imaging quality. For example, the diaphragm STO may be disposed at a position close to the first side S10 of the fifth lens L5 between the fourth lens L4 and the fifth lens L5.

[0249] Optionally, the optical lens may further include a filter L7 having a first side S14 and a second side S15. The filter L7 can be used to correct color deviation. Optionally, the optical lens may further include a protective glass L8 having a first side S16 and a second side S17. The protective glass L8 can be used to protect the image sensing chip IMA located at the second side.

[0250] The optical lens provided in this application can be used as, for example, an imaging lens. At this time, the light from the object sequentially passes through the surfaces S1 to S17 and finally forms an image on the second side (i.e., the imaging surface) provided on the second side, where an image sensing chip IMA is provided at the imaging surface. It should be understood that the optical lens provided in this application can also be used as, for example, a projection lens or a lidar transmitting end lens. At this time, the light from the image source side sequentially passes through the surfaces S17 to S1 and finally projects onto the first side (i.e., the projection surface, not shown) provided on the first side, where an image sensing chip IMA is provided at the image source surface.

[0251] Table 15 shows the radius of curvature R, thickness / distance T, refractive index Nd, and Abbe number Vd of each lens of the optical lens of Example 8.

[0252]

[0253]

[0254] Table 15

[0255] In Embodiment 8, the first side and the second side of the third lens L3 and the sixth lens L6 are both aspherical surfaces. Table 16 below gives the conic coefficients k and the higher-order coefficients A, B, C, D, and E of the aspherical surfaces S5, S6, S12, and S13 that can be used in Embodiment 8.

[0256] Surface number k A B C D E S5 0.0275 -2.5269E-08 -1.8522E-10 -9.1495E-13 5.5242E-17 3.7714E-17 S6 -0.0016 -1.2728E-08 2.5220E-11 1.9895E-13 8.2356E-16 1.5472E-18 S12 -0.5748 -6.1505E-06 -1.5570E-08 2.6120E-10 2.8431E-15 -5.2258E-15 S13 4.4944 1.9682E-04 -1.0342E-05 5.3936E-07 -1.2101E-08 1.1235E-10

[0257] Table 16

[0258] In summary, Embodiments 1 to 8 respectively satisfy the relationships shown in Table 17-1 and Table 17-2 below. In Table 17-1 and Table 17-2, the units of F, ENPD, TTL, H, D, BFL, DMAX, F1, F2, F3, F4, F5, F6, R1, R2, R3, R4, R5, R6, R7, R8, R10, R11, R12, R13, D, D6, and D7 are millimeters (mm), the unit of FOV is degrees (°), and the unit of θ is radians (rad).

[0259]

[0260]

[0261] Table 17-1

[0262]

[0263]

[0264]

[0265] Table 17-2

[0266] The present application also provides an electronic device, which may include an optical lens according to the above embodiments 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 distance detection camera, or an imaging module integrated on a distance detection device such as a distance detection device. In addition, the electronic device may also be an independent imaging device such as a vehicle-mounted camera, or an imaging module integrated on an auxiliary driving system such as an auxiliary driving system.

[0267] The above description is only a preferred embodiment of the present application and an explanation of the applied technical principles. Those skilled in the art should understand that the scope of the invention involved in the present application is not limited to the technical solution formed by the 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 technical solution formed by mutually replacing the above features with the technical features (but not limited to) disclosed in the present application that have similar functions.

Claims

1. An optical lens, characterized in that, The optical lens sequentially includes, from the first side to the second side along the optical axis: A first lens with a positive focal power, whose first side is convex and second side is concave; A second lens with a negative focal power, whose first side is concave and second side is convex; A third lens with a positive focal power, whose second side is convex; A fourth lens with a positive focal power, whose first side is convex; A fifth lens with a positive focal power, whose first side is convex and second side is concave; and A sixth lens with a focal power, whose first side is convex and second side is concave.

2. The optical lens according to claim 1, characterized in that, The first side of the third lens is convex or concave.

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

4. The optical lens according to any one of claims 1 - 3, characterized in that, The total length TTL of the optical lens, the maximum field of view FOV of the optical lens, and the image height H corresponding to the maximum field of view of the optical lens satisfy: TTL / H / FOV×180°≤90.

5. The optical lens according to any one of claims 1 - 3, characterized in that, The maximum clear aperture D of the first side of the first lens corresponding to the maximum field of view of the optical lens, the image height H corresponding to the maximum field of view of the optical lens, and the radian value θ of the maximum field of view of the optical lens satisfy: 0≤D / H / θ≤9.

6. The optical lens according to any one of claims 1 - 3, characterized in that, The maximum clear aperture D of the first side of the first lens corresponding to the maximum field of view angle of the optical lens, the image height H corresponding to the maximum field of view angle of the optical lens, and the total effective focal length F of the optical lens satisfy: D / H / F ≤ 0.5 mm -1 .

7. The optical lens according to any one of claims 1 - 3, characterized in that, The total effective focal length F of the optical lens, the radian value θ of the maximum field of view of the optical lens, and the maximum clear aperture D of the first side of the first lens corresponding to the maximum field of view of the optical lens satisfy: F×θ / D≥0.

1.

8. The optical lens according to any one of claims 1 - 3, characterized in that, The back focal length BFL of the optical lens and the total length TTL of the optical lens satisfy: BFL / TTL≤0.

4.

9. An optical lens, characterized in that, The optical lens sequentially includes, from the first side to the second side along the optical axis: A first lens with a positive focal power; A second lens with a negative focal power; A third lens with a positive focal power; A fourth lens with a positive focal power; A fifth lens with a positive focal power; and A sixth lens with a focal power; Wherein, the radius of curvature R4 of the second side of the second lens and the effective focal length F2 of the second lens satisfy: R4 / F2≥2.

10. An electronic device, characterized in that, An imaging element including the optical lens according to any one of claims 1-9 and for converting the optical image formed by the optical lens into an electrical signal.

Images