Optical lenses and electronic equipment

Abstract

The present application discloses an optical lens and an electronic device, which include a first lens to a sixth lens in sequence from the first side to the second side along the optical axis. Among them, the optical power of the first lens is negative, and the optical power of the third lens is positive. The second side surface of the first lens is concave; the first side surface of the second lens is concave, and the second side surface is convex; the first side surface of the third lens is convex; the second side surface of the sixth lens is concave. The fourth lens and the fifth lens are glued to form a glued lens; the positive and negative properties of the signs of the optical power of the fourth lens and the fifth lens are opposite. The optical lens satisfies 1.5≤TTL / F≤2.8, 0.25≤F3 / F≤1.7, d56 / TTL≤0.025, 0.225≤(d8+d9) / TTL≤0.4 and |R5 / R6|≤2.

Description

Technical Field

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

[0002] In recent years, automobile assisted driving technology has become increasingly popular among users, and the demand for on-board lenses for obtaining external information of the car has also become increasingly high. On-board lenses refer to optical lenses installed on the car to achieve various functions. On-board lenses may include, for example, interior view lenses, rear view lenses, front view lenses, side view lenses, surround view lenses, etc.

[0003] High resolution and miniaturization are the core competitive qualities of automotive lenses. However, with the use of large chips, higher requirements are placed on the resolution capabilities of optical lenses that can be used as automotive lenses. In order to achieve high resolution of optical lenses, optical lenses usually need to be equipped with multiple lenses, which will increase the total optical length of the optical lens and is not conducive to achieving miniaturization of the optical lens. Summary of the invention

[0004] The first aspect of the present application provides an optical lens, which includes, from the first side to the second side along the optical axis, a first lens with negative optical power, a second lens with optical power, a third lens with positive optical power, a fourth lens with optical power, a fifth lens with optical power, and a sixth lens with optical power. The second side surface of the first lens is concave; the first side surface of the second lens is concave, and the second side surface is convex; the first side surface of the third lens is convex; and the second side surface of the sixth lens is concave. The fourth lens and the fifth lens are glued together to form a glued lens; the signs of the optical power of the fourth lens and the fifth lens are opposite in positive and negative properties; the number of lenses with optical power in the optical lens is six. The optical lens satisfies: 1.5≤TTL / F≤2.8, 0.25≤F3 / F≤1.7, d56 / TTL≤0.025, 0.225≤(d8+d9) / TTL≤0.4, and |R5 / R6|≤2; wherein, TTL is the total optical length of the optical lens, F is the total effective focal length of the optical lens, F3 is the effective focal length of the third lens, d56 is the axial distance from the second side surface of the fifth lens to the first side surface of the sixth lens, d8 is the center thickness of the fourth lens on the optical axis, d9 is the center thickness of the fifth lens on the optical axis, R5 is the curvature radius of the first side surface of the third lens, and R6 is the curvature radius of the second side surface of the third lens.

[0005] According to an exemplary embodiment of the present application, the second lens has positive or negative power.

[0006] According to an exemplary embodiment of the present application, the first side surface of the third lens is a convex surface, and the second side surface is a convex surface; or, the first side surface of the third lens is a convex surface, and the second side surface is a concave surface.

[0007] According to an exemplary embodiment of the present application, the fourth lens has negative optical power, and its first side surface is concave, and its second side surface is concave; or, the fourth lens has negative optical power, and its first side surface is convex, and its second side surface is concave; or, the fourth lens has positive optical power, and its first side surface is convex, and its second side surface is convex.

[0008] According to an exemplary embodiment of the present application, the fifth lens has positive optical power, and its first side surface is convex, and its second side surface is convex; or, the fifth lens has negative optical power, and its first side surface is concave, and its second side surface is convex.

[0009] According to an exemplary embodiment of the present application, the sixth lens has negative optical power, and its first side surface is convex, and its second side surface is concave; or, the sixth lens has negative optical power, and its first side surface is concave, and its second side surface is concave; or, the sixth lens has positive optical power, and its first side surface is convex, and its second side surface is concave.

[0010] According to an exemplary embodiment of the present application, the radius of curvature R3 of the first side surface of the second lens, the total effective focal length F of the optical lens, and the radius of curvature R4 of the second side surface of the second lens satisfy: 1.0≤|F / R3|+|F / R4|≤3.0.

[0011] According to an exemplary embodiment of the present application, a radius of curvature R3 of the first side surface of the second lens and a radius of curvature R4 of the second side surface of the second lens satisfy: 0.5≤R3 / R4≤15.

[0012] According to an exemplary embodiment of the present application, the combined focal length F45 of the fourth lens and the fifth lens and the total effective focal length F of the optical lens satisfy: 0.5≤F45 / F≤7.

[0013] According to an exemplary embodiment of the present application, the image height H corresponding to the maximum field angle of the optical lens, the total effective focal length F of the optical lens, and the arc value θ of the maximum field angle of the optical lens satisfy: |(HF×θ) / (F×θ)|≤0.15.

[0014] According to an exemplary embodiment of the present application, a radius of curvature R5 of the first side surface of the third lens and a total effective focal length F of the optical lens satisfy: 0.5≤R5 / F≤1.8.

[0015] According to an exemplary embodiment of the present application, the effective focal length F4 of the fourth lens and the effective focal length F5 of the fifth lens satisfy: 0.45≤|F4 / F5|≤3.5.

[0016] According to an exemplary embodiment of the present application, the effective focal length F1 of the first lens and the total effective focal length F of the optical lens satisfy: -3.5≤F1 / F≤-1.1.

[0017] According to an exemplary embodiment of the present application, the vector height SAG11 of the first side surface of the sixth lens and the maximum clear aperture D11 of the first side surface of the sixth lens corresponding to the maximum field angle of the optical lens satisfy: |SAG11 / D11|≤0.15.

[0018] According to an exemplary embodiment of the present application, the maximum clear aperture D12 of the second side surface of the sixth lens corresponding to the maximum field angle of the optical lens and the image height H corresponding to the maximum field angle of the optical lens satisfy: 0.5≤D12 / H≤1.2.

[0019] According to an exemplary embodiment of the present application, the effective focal length F6 of the sixth lens and the total effective focal length F of the optical lens satisfy: 0.75≤|F6 / F|.

[0020] According to an exemplary embodiment of the present application, a center thickness d6 of the third lens on the optical axis and a total optical length TTL of the optical lens satisfy: 0.15≤d6 / TTL≤0.24.

[0021] According to an exemplary embodiment of the present application, the total effective focal length F of the optical lens and the image height H corresponding to the maximum field angle of the optical lens satisfy: 0.65≤F / H≤0.8.

[0022] According to an exemplary embodiment of the present application, an axial distance d34 from the second side surface of the third lens to the first side surface of the fourth lens and a total optical length TTL of the optical lens satisfy: d34 / TTL≤0.05.

[0023] According to an exemplary embodiment of the present application, a radius of curvature R5 of the first side surface of the third lens and a center thickness d6 of the third lens on the optical axis satisfy: 1.25≤R5 / d6≤3.5.

[0024] According to an exemplary embodiment of the present application, the optical lens satisfies at least one of the following conditional expressions:

[0025] 0.045≤ΣT / TTL≤0.185; 2.8≤|R1 / F|≤25; 0.15≤BFL / TTL≤0.28; 0.08 mm -1 ≤D / H / F≤0.15 mm -1; 0.8≤R2 / D2≤3.6; TTL / H / FOV×1°≤0.028; 1.85≤F / ENPD≤2.4; |R6 / TTL|≤60; -6.5≤R3 / TTL≤-0.25; 1.45≤|F2 / F|; Wherein, ΣT is the sum of the air intervals between any two adjacent lenses from the first lens to the sixth lens on the optical axis, TTL is the total optical length of the optical lens, R3 is the curvature radius of the first side surface of the second lens, R4 is the curvature radius of the second side surface of the second lens, and R1 is the curvature radius of the first side surface of the first lens. where R2 is the radius of curvature of the second side of the first lens, D2 is the maximum aperture of the second side of the first lens corresponding to the maximum field of view of the optical lens, FOV is the maximum field of view of the optical lens, ENPD is the entrance pupil diameter of the optical lens, R6 is the radius of curvature of the second side of the third lens, and F2 is the effective focal length of the second lens.

[0026] According to an exemplary embodiment of the present application, the optical lens satisfies at least one of the following conditional expressions:

[0027] 1.7≤TTL / F≤2.65; 0.45≤F3 / F≤1.5; 1.65≤|F2 / F|≤60; 1.2≤|F / R3|+|F / R4|≤2.9; -3. 2≤F1 / F≤-1.25; 3≤|R1 / F|≤20; 0.002≤d56 / TTL≤0.022; 0.185≤BFL / TTL≤0.25; 0.095 mm -1 ≤D / H / F≤0.125 mm -1 ;1≤R2 / D2≤3.2;0.6≤|F4 / F5|≤2.8;0.65≤F45 / F≤6;0.060≤ΣT / TTL≤0.160;0.7≤D12 / H≤1.0;0.008≤ |(HF×θ) / (F×θ)|≤0.125; |SAG11 / D11|≤0.12; 0.65≤R3 / R4≤12; 0.6≤R5 / F≤1.6; 0.250≤(d8+d9) / TTL ≤0.350; 0.85≤|F6 / F|≤85; 0.165≤d6 / TTL≤0.22; |R5 / R6|≤1.8; 0.69≤F / H≤0.77; 0.018≤TTL / H / FOV ×1°≤0.025; 2≤F / ENPD≤2.25; d34 / TTL≤0.04; 1.5≤R5 / d6≤3.2; 0.2≤|R6 / TTL|≤55; -5≤R3 / TTL≤-0.4;

[0028] Wherein, TTL is the total optical length of the optical lens, F is the total effective focal length of the optical lens, F3 is the effective focal length of the third lens, F2 is the effective focal length of the second lens, R3 is the radius of curvature of the first side surface of the second lens, R4 is the radius of curvature of the second side surface of the second lens, F1 is the effective focal length of the first lens, R1 is the radius of curvature of the first side surface of the first lens, d56 is the axial distance from the second side surface of the fifth lens to the first side surface of the sixth lens, BFL is the back focal length of the optical lens, D is the maximum clear aperture of the first side surface of the first lens corresponding to the maximum field of view of the optical lens, H is the image height corresponding to the maximum field of view of the optical lens, R2 is the radius of curvature of the second side surface of the first lens, D2 is the maximum clear aperture of the second side surface of the first lens corresponding to the maximum field of view of the optical lens, F4 is the effective focal length of the fourth lens, F5 is the effective focal length of the fifth lens, and F45 is the distance between the fourth and fifth lenses. is the combined focal length of the first lens, ΣT is the sum of the air intervals between any two adjacent lenses from the first lens to the sixth lens on the optical axis, D12 is the maximum effective aperture of the second side of the sixth lens corresponding to the maximum field of view of the optical lens, θ is the radian value of the maximum field of view of the optical lens, SAG11 is the vector height of the first side of the sixth lens, D11 is the maximum effective aperture of the first side of the sixth lens corresponding to the maximum field of view of the optical lens, R5 is the radius of curvature of the first side of the third lens, d8 is the center thickness of the fourth lens on the optical axis, d9 is the center thickness of the fifth lens on the optical axis, F6 is the effective focal length of the sixth lens, d6 is the center thickness of the third lens on the optical axis, R6 is the radius of curvature of the second side of the third lens, FOV is the maximum field of view of the optical lens, ENPD is the entrance pupil diameter of the optical lens, and d34 is the axial distance from the second side of the third lens to the first side of the fourth lens.

[0029] According to an exemplary embodiment of the present application, the optical lens satisfies at least one of the following conditional expressions:

[0030] 2.206≤TTL / F≤2.500; 0.623≤F3 / F≤1.460; 1.738≤|F2 / F|≤37.423; 1.286≤|F / R3|+|F / R4|≤2.827; - 3.000≤F1 / F≤-1.356; 3.343≤|R1 / F|≤18.077; 0.008≤d56 / TTL≤0.020; 0.200≤BFL / TTL≤0.238; 0.104 mm -1 ≤D / H / F≤0.119 mm -1;1.425≤R2 / D2≤2.782;0.627≤|F4 / F5|≤1.591;0.896≤F45 / F≤4.157;0.081≤ΣT / TTL≤0.141;0.749≤D12 / H≤0.976;0.010≤|(H-F×θ) / (F×θ)|≤0.086;0.003≤|SAG11 / D11|≤0.086;0.763≤R3 / R4≤10.305;0.772≤R5 / F≤1.382;0.268≤(d8+d9) / TTL≤0.336;0.903≤|F6 / F|≤82.425;0.175≤d6 / TTL≤0.200;0.007≤|R5 / R6|≤1.389;0.694≤F / H≤0.746;0.020≤TTL / H / FOV×1°≤0.023;2.200≤F / ENPD≤2.240;0.008≤d34 / TTL≤0.034;1.834≤R5 / d6≤2.914;0.418≤|R6 / TTL|≤49.967;-3.977≤R3 / TTL≤-0.305;

[0031] Wherein, TTL is the total optical length of the optical lens, F is the total effective focal length of the optical lens, F3 is the effective focal length of the third lens, F2 is the effective focal length of the second lens, R3 is the radius of curvature of the first side surface of the second lens, R4 is the radius of curvature of the second side surface of the second lens, F1 is the effective focal length of the first lens, R1 is the radius of curvature of the first side surface of the first lens, d56 is the axial distance from the second side surface of the fifth lens to the first side surface of the sixth lens, BFL is the back focal length of the optical lens, D is the maximum clear aperture of the first side surface of the first lens corresponding to the maximum field of view of the optical lens, H is the image height corresponding to the maximum field of view of the optical lens, R2 is the radius of curvature of the second side surface of the first lens, D2 is the maximum clear aperture of the second side surface of the first lens corresponding to the maximum field of view of the optical lens, F4 is the effective focal length of the fourth lens, F5 is the effective focal length of the fifth lens, and F45 is the distance between the fourth and fifth lenses. is the combined focal length of the first lens, ΣT is the sum of the air intervals between any two adjacent lenses from the first lens to the sixth lens on the optical axis, D12 is the maximum effective aperture of the second side of the sixth lens corresponding to the maximum field of view of the optical lens, θ is the radian value of the maximum field of view of the optical lens, SAG11 is the vector height of the first side of the sixth lens, D11 is the maximum effective aperture of the first side of the sixth lens corresponding to the maximum field of view of the optical lens, R5 is the radius of curvature of the first side of the third lens, d8 is the center thickness of the fourth lens on the optical axis, d9 is the center thickness of the fifth lens on the optical axis, F6 is the effective focal length of the sixth lens, d6 is the center thickness of the third lens on the optical axis, R6 is the radius of curvature of the second side of the third lens, FOV is the maximum field of view of the optical lens, ENPD is the entrance pupil diameter of the optical lens, and d34 is the axial distance from the second side of the third lens to the first side of the fourth lens.

[0032] A second aspect of the present application provides an electronic device comprising the optical lens of the exemplary embodiment described above, and at least one of an imaging element and a light source, wherein the imaging element is used to convert an optical image or optical information formed by the optical lens into an electrical signal, and the light source is located on the second side of the optical lens, and the light emitted by the light source is projected onto the first side of the optical lens after passing through the optical lens, and forms an image or illuminates an area on the first side of the optical lens.

[0033] The optical lens according to the embodiment of the present application adopts six lenses with optical power, wherein the first lens has negative optical power, and its second side is concave; the second lens has optical power, its first side is concave, and its second side is convex; the third lens has positive optical power, and its first side is convex; the fourth lens has optical power; the fifth lens has optical power; the sixth lens has optical power, and its second side is concave; the fourth lens and the fifth lens are glued to form a glued lens; the positive and negative properties of the signs of the optical power of the fourth lens and the fifth lens are opposite. The divergent light emitted from the first lens enters the second lens, and the first side of the second lens is concave, which is conducive to the smooth reception of the light emitted from the first lens, and the second side is convex, which can properly converge the light emitted from the first side. The light emitted from the second lens enters the third lens. By controlling the ratio of the effective focal length of the third lens to the total effective focal length of the optical lens and the relationship between the radius of curvature of the first side surface of the third lens and the radius of curvature of the second side surface of the third lens, that is, 0.25≤F3 / F≤1.7 and |R5 / R6|≤2, the third lens can have positive focal power and a smaller effective focal length, thereby enhancing the convergence ability of the third lens on the light emitted from the second lens and reducing the total optical length. Since the second side surface of the second lens is a convex surface, it can properly converge the light. By controlling the effective focal length of the third lens to be smaller, the light emitted from the second lens can be properly converged, the generation of aberrations can be reduced, and high resolution can be achieved. At the same time, the surface shape of the second side surface of the third lens is made flatter than the first side surface, so that the first side surface of the third lens can properly converge the light and be smoothly transitioned to the rear system at the second side surface. In conjunction with controlling the third lens to have a larger central thickness, the smooth transition of the light can be further achieved, and the sensitivity of the third lens can be reduced. The light emitted through the third lens enters the fourth lens and the fifth lens. By controlling the relationship between the center thickness of the fourth lens on the optical axis, the center thickness of the fifth lens on the optical axis and the total optical length of the optical lens, that is, 0.225≤(d8+d9) / TTL≤0.4, the center thickness of the cemented lens formed by the fourth lens and the fifth lens can be controlled, which is beneficial to the smooth transition of the edge field light to the rear system, and compresses the angle between the light and the image plane, improves the relative illumination, facilitates the layout of the lenses, reduces the difficulty of processing, avoids the large total optical length caused by the large center thickness of the cemented lens, and is beneficial to the miniaturization of the optical lens.The light emitted from the fifth lens enters the air gap between the fifth lens and the sixth lens. By controlling the ratio of the on-axis distance from the second side surface of the fifth lens to the first side surface of the sixth lens to the total optical length of the optical lens, that is, d56 / TTL≤0.025, the distance between the fifth lens and the sixth lens can be reduced, which is conducive to miniaturization of the optical lens; by reducing the on-axis distance between the cemented lens formed by the cementation of the fourth lens and the fifth lens and the sixth lens, and by coordinating the cemented lens, the light passing through the cemented lens reaches the image plane as soon as possible, reducing the light energy loss, reducing the total optical length of the optical lens, and improving the imaging quality. In addition, by controlling the ratio of the total optical length of the optical lens to the total effective focal length of the optical lens, that is, 1.5≤TTL / F≤2.8, the miniaturization of the optical lens is achieved while ensuring that the optical lens meets a large field of view. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] Other features, objects and advantages of the present application will become more apparent by reading the detailed description of non-limiting embodiments made with reference to the following drawings, in which:

[0035] Figure 1 A schematic structural diagram of an optical lens according to Embodiment 1 of the present application is shown;

[0036] Figure 2 shows a modulation transfer function (MTF) curve of the optical lens according to Example 1 of the present application;

[0037] Figure 3 A schematic structural diagram of an optical lens according to Embodiment 2 of the present application is shown;

[0038] Figure 4 shows a modulation transfer function curve of the optical lens according to Example 2 of the present application;

[0039] Figure 5 A schematic structural diagram of an optical lens according to Embodiment 3 of the present application is shown;

[0040] Figure 6 shows a modulation transfer function curve of the optical lens according to Example 3 of the present application;

[0041] Figure 7 A schematic structural diagram of an optical lens according to Embodiment 4 of the present application is shown;

[0042] Figure 8 shows a modulation transfer function curve of the optical lens according to Example 4 of the present application;

[0043] Fig. 9A schematic structural diagram of an optical lens according to Embodiment 5 of the present application is shown;

[0044] Fig.10 shows a modulation transfer function curve of the optical lens according to Example 5 of the present application;

[0045] Fig.11 A schematic structural diagram of an optical lens according to Embodiment 6 of the present application is shown;

[0046] Fig.12 shows a modulation transfer function curve of the optical lens according to Example 6 of the present application;

[0047] Fig.13 A schematic structural diagram of an optical lens according to Embodiment 7 of the present application is shown;

[0048] Fig.14 shows a modulation transfer function curve of the optical lens according to Example 7 of the present application;

[0049] Fig.15 A schematic structural diagram of an optical lens according to Example 8 of the present application is shown;

[0050] Fig.16 shows a modulation transfer function curve of the optical lens according to Example 8 of the present application;

[0051] Fig.17 A schematic structural diagram of an optical lens according to Example 9 of the present application is shown;

[0052] Fig.18 shows a modulation transfer function curve of the optical lens according to Example 9 of the present application;

[0053] Fig.19 A schematic structural diagram of an optical lens according to Embodiment 10 of the present application is shown;

[0054] Fig. 20 shows a modulation transfer function curve of the optical lens according to Example 10 of the present application;

[0055] Fig.21 A schematic structural diagram of an optical lens according to Example 11 of the present application is shown;

[0056] Fig. 22 shows a modulation transfer function curve of the optical lens according to Example 11 of the present application;

[0057] Fig.23 A schematic structural diagram of an optical lens according to Embodiment 12 of the present application is shown;

[0058] Fig.24shows a modulation transfer function curve of the optical lens according to Example 12 of the present application;

[0059] Fig.25 A schematic structural diagram of an optical lens according to Example 13 of the present application is shown;

[0060] Fig.26 shows a modulation transfer function curve of the optical lens according to Example 13 of the present application;

[0061] Fig. 27 A schematic structural diagram of an optical lens according to Embodiment 14 of the present application is shown;

[0062] Fig.28 shows a modulation transfer function curve of the optical lens according to Example 14 of the present application;

[0063] Fig.29 A schematic structural diagram of an optical lens according to Embodiment 15 of the present application is shown;

[0064] Fig.30 shows a modulation transfer function curve of the optical lens according to Example 15 of the present application;

[0065] Fig.31 A schematic structural diagram of an optical lens according to Example 16 of the present application is shown;

[0066] Fig.32 shows a modulation transfer function curve of the optical lens according to Example 16 of the present application;

[0067] Fig.33 A schematic structural diagram of an optical lens according to Embodiment 17 of the present application is shown;

[0068] Fig.34 shows a modulation transfer function curve of the optical lens according to Example 17 of the present application;

[0069] Fig.35 A schematic structural diagram of an optical lens according to Example 18 of the present application is shown;

[0070] Fig.36 shows a modulation transfer function curve of the optical lens according to Example 18 of the present application;

[0071] Fig.37 A schematic structural diagram of an optical lens according to Example 19 of the present application is shown;

[0072] Fig.38 shows a modulation transfer function curve of the optical lens according to Example 19 of the present application;

[0073] Fig.39A schematic structural diagram of an optical lens according to Embodiment 20 of the present application is shown;

[0074] Fig.40 shows a modulation transfer function curve of the optical lens according to Example 20 of the present application;

[0075] Fig.41 A schematic structural diagram of an optical lens according to Example 21 of the present application is shown;

[0076] Fig.42 shows a modulation transfer function curve of the optical lens according to Example 21 of the present application;

[0077] Fig.43 A schematic structural diagram of an optical lens according to Example 22 of the present application is shown;

[0078] Fig.44 The modulation transfer function curve of the optical lens according to Example 22 of the present application is shown. DETAILED DESCRIPTION

[0079] In order to better understand the present application, a more detailed description will be made of various aspects of the present application with reference to the accompanying drawings. It should be understood that these detailed descriptions are only descriptions of exemplary embodiments of the present application, and do not limit the scope of the present application in any way. Throughout the specification, the same figure numerals refer to the same elements.

[0080] It should be noted that in this specification, the expressions of first, second, third, etc. are only used to distinguish one feature from another feature, and do not represent any limitation on the features. Therefore, without departing from the teaching of the present application, the first lens discussed below may also be referred to as the second lens or the third lens.

[0081] In the drawings, the thickness, size and shape of the lenses have been slightly exaggerated for ease of illustration. Specifically, the shapes of the spherical or aspherical surfaces shown in the drawings are shown by way of example. That is, the shapes of the spherical or aspherical surfaces are not limited to the shapes of the spherical or aspherical surfaces shown in the drawings. The drawings are for illustration only and are not drawn strictly to scale.

[0082] In this article, the paraxial region refers to the region near the optical axis. If the lens surface is convex and the position of the convex surface is not defined, it means that the lens surface is convex at least in the paraxial region; if the lens surface is concave and the position of the concave surface is not defined, it means that the lens surface is concave at least in the paraxial region. The surface of each lens closest to the first side is called the first side surface of the lens, and the surface of each lens closest to the second side is called the second side surface of the lens.

[0083] It should also be understood that the terms "include", "comprising", and / or "having", 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 describing embodiments of the present application, the term "may" is used to indicate "one or more embodiments of the present application". Furthermore, the term "exemplary" is intended to refer to an example or illustration.

[0084] Unless otherwise defined, all terms (including technical terms and scientific terms) used in this article have the same meaning as commonly understood by ordinary technicians in the field to which this application belongs. It should also be understood that terms (such as terms defined in commonly used dictionaries) should be interpreted as having the same meaning as their meaning in the context of the relevant technology, and will not be interpreted in an idealized or overly formal sense unless explicitly defined in this article.

[0085] It should be noted that, in the absence of conflict, the embodiments and features in the embodiments of the present application can be combined with each other. The present application will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0086] The features, principles and other aspects of the present application are described in detail below.

[0087] The optical lens according to an exemplary embodiment of the present application 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, and the six lenses are arranged in sequence from the first side to the second side along the optical axis.

[0088] In an exemplary embodiment, the optical lens may be used as, for example, an imaging lens, in which case the first side of the optical lens may be an object side and the second side may be an image side. Light from the object side may be imaged on the image side. The second side of the optical lens is provided with an imaging surface of the optical lens.

[0089] In an exemplary embodiment, the optical lens can be used as, for example, a projection lens or a laser radar transmitting end lens. In this case, the second side of the optical lens can be an image source side, and the first side can be an imaging side. Light from the image source side can be imaged on the imaging side. The second side of the optical lens is provided with an image source surface of the optical lens.

[0090] In an exemplary embodiment, the first lens may have a negative optical focal length, and its first side surface may be, for example, a convex surface, and the second side surface may be, for example, a concave surface. The first lens is a negative lens, which has a divergent effect on light, and the first side surface is set as a convex surface, which can effectively compress the incident angle of the light and collect as much light as possible to enter the system, thereby achieving large field angle imaging; the second side surface is set as a concave surface, which can collect as much large field of view light as possible and allow it to smoothly enter the rear system, and control the trend of large-angle light at the edge. The first lens is made of a high refractive index material, which is conducive to compressing the incident angle of light, reducing the front port diameter of the optical lens, and improving the imaging quality. In addition, the first side surface of the first lens is set as a convex surface, which is conducive to the sliding of water droplets and reducing the influence of external environments such as water droplets on the imaging quality.

[0091] In an exemplary embodiment, the first lens may have a negative optical power, and its first side surface may be, for example, a concave surface, and its second side surface may be, for example, a concave surface. The first lens is a negative lens, which has a divergent effect on light, and the first side surface is set as a concave surface, which can enhance the degree of deflection of the first lens on the light, so that the light enters the second lens at a smaller angle, which is conducive to controlling distortion. The second side surface of the first lens is set as a concave surface, which is conducive to collecting as much light as possible to enter the rear system and controlling the trend of large-angle light at the edge.

[0092] In an exemplary embodiment, the second lens may have a positive optical power, and its first side surface may be, for example, a concave surface, and its second side surface may be, for example, a convex surface. The second lens is a positive lens, which can converge the light emitted by the first lens, which is conducive to the miniaturization and small aperture of the optical lens. The first side surface of the second lens is set as a concave surface, which is conducive to smoothly receiving the light emitted by the first lens, and reasonably allocating the angles between the central field of view light, the edge field of view light and the optical axis, thereby improving the optical performance. The second side surface of the second lens is set as a convex surface, which can further converge the light and reduce the angle between the light and the optical axis, which is conducive to moving the aperture position forward (i.e., shifting to the first side), reducing the light aperture of the first lens, and realizing a small principal light angle of the optical lens.

[0093] In an exemplary embodiment, the second lens may have a negative optical power, and its first side surface may be, for example, a concave surface, and the second side surface may be, for example, a convex surface. The second lens is a negative lens, which can slow down the convergence of the light emitted from the first lens, reduce the degree of deflection of the light, and facilitate the distribution of the optical power of the subsequent lens. The first side surface of the second lens is set as a concave surface, which is conducive to smoothly receiving the light emitted by the first lens, and reasonably distributing the angle between the central field of view light and the edge field of view light and the optical axis, thereby improving the optical performance. The second side surface of the second lens is set as a convex surface, which can further converge the light and reduce the angle between the light and the optical axis, which is conducive to moving the aperture position forward (i.e., shifting to the first side), reducing the light aperture of the first lens, and realizing a small principal light angle of the optical lens.

[0094] In an exemplary embodiment, the third lens may have positive power, and its first side surface may be, for example, a convex surface, and its second side surface may be, for example, a convex surface. The third lens is a positive lens, and the third lens is biconvex and has a gentle surface trend, which can appropriately converge the light emitted by the second lens and smoothly transition it to the rear system.

[0095] In an exemplary embodiment, the third lens may have positive focal power, and its first side surface may be, for example, a convex surface, and its second side surface may be, for example, a concave surface. The third lens is a positive lens, which can appropriately converge the light emitted by the second lens, so that it can smoothly transition to the rear system; the first side surface of the third lens is set as a convex surface, which is conducive to shortening the on-axis distance between the third lens and the aperture, thereby allowing the light emitted by the aperture to enter the third lens at a smaller angle, reducing the sensitivity of the third lens; the second side surface of the third lens is set as a concave surface, which can make the light emitted by the first side surface of the third lens diverge at a certain angle, which is conducive to the light to achieve a larger image height on the image plane (for example, the imaging plane or the image source plane), while increasing the amount of light in the edge field of view, and improving the relative illumination of the optical lens.

[0096] In an exemplary embodiment, the fourth lens and the fifth lens are glued to form a glued lens. The fourth lens and the fifth lens have opposite positive and negative properties of optical power, which can make the light smoothly transition to the rear system. The trend of light on the second side of the fourth lens and the first side of the fifth lens is almost the same and there is no obvious deflection. Therefore, the fifth lens can smoothly receive the light emitted by the fourth lens, reduce the light loss caused by the reflection of the light between the lenses, and effectively improve the relative illumination of each field of view. In addition, the field curvature is reduced and the off-axis aberration of the optical lens is corrected. The glued lens can also fully correct various aberrations of the optical system. Under the premise of compact structure, it can improve the resolution and optimize the optical performance such as distortion and CRA (Chief Ray Angle).

[0097] In an exemplary embodiment, the fourth lens may have a negative optical power, and its first side surface may be, for example, a concave surface, and its second side surface may be, for example, a concave surface. The fourth lens is a negative lens, which can collect the light emitted from the third lens and properly diverge it, and at the same time is conducive to adjusting the optical path difference between light rays of different fields of view, paving the way for subsequent light rays to converge better to the image plane. The first side surface of the fourth lens is set as a concave surface, which is close to the radius of curvature of the second side surface of the third lens, which is conducive to achieving a smooth transition of light and reducing the sensitivity of the fourth lens to eccentricity. The second side surface of the fourth lens is set as a concave surface, which can properly diverge the light rays of each field of view, so that the light rays can achieve a larger image height on the image plane.

[0098] In an exemplary embodiment, the fourth lens may have a negative optical power, and its first side surface may be, for example, a convex surface, and its second side surface may be, for example, a concave surface. The fourth lens is a negative lens, which can collect the light emitted from the third lens and diverge it appropriately, and at the same time is conducive to adjusting the optical path difference between light rays of different fields of view, paving the way for subsequent light rays to converge better to the image plane. The first side surface of the fourth lens is set to a convex surface, and the vector height at its maximum aperture is small, which can effectively avoid excessive deflection of light, reduce the sensitivity of the fourth lens, and reduce the influence of temperature changes on the fourth lens. The second side surface of the fourth lens is a concave surface, which can further diverge the light rays of each field of view, so that the light rays can achieve a larger image height on the image plane.

[0099] In an exemplary embodiment, the fourth lens may have positive focal power, and its first side surface may be, for example, a convex surface, and its second side surface may be, for example, a convex surface. The fourth lens is a positive lens, which can appropriately converge the light emitted from the third lens, make the light more concentrated, reduce the angle between the light and the optical axis, and thus reduce the aperture size of the rear lens. The first side surface of the fourth lens is set as a convex surface, which is close to the radius of curvature of the second side surface of the third lens, which is conducive to achieving a smooth transition of the light, shortening the on-axis distance from the second side surface of the third lens to the first side surface of the fourth lens, and is conducive to miniaturization of the optical lens. The second side surface of the fourth lens is set as a convex surface, which can shrink the light, reduce the generation of aberrations such as spherical aberration, and improve optical performance.

[0100] In an exemplary embodiment, the fifth lens may have positive focal power, and its first side surface may be, for example, a convex surface, and its second side surface may be, for example, a convex surface. The fifth lens is a positive lens, which can appropriately converge the received light. The shape of the fifth lens is set to be biconvex, which can converge the light diverged by the fourth lens and smoothly transition it to the rear system, thereby reducing the sensitivity of the optical lens. At the same time, the biconvex design of the fifth lens can make the light converge twice by the first side surface and the second side surface of the fifth lens, and the edge field light is more deflected toward the optical axis after being emitted from the second side surface of the fifth lens, thereby effectively shortening the total optical length and realizing the miniaturization of the optical lens.

[0101] In an exemplary embodiment, the fifth lens may have a negative optical power, and its first side surface may be, for example, a concave surface, and its second side surface may be, for example, a convex surface. The fifth lens is a negative lens, which can appropriately diverge the light emitted by the fourth lens. When the aperture of the fifth lens is constant, it is beneficial for the light to achieve a larger imaging height on the image plane. The first side surface of the fifth lens is set as a concave surface, and the vector height at the maximum aperture is large, which is beneficial for the reasonable distribution of the divergence degree of the central field of view light and the edge field of view light, and is convenient for correcting the distortion and angular resolution generated by the optical lens. The second side surface of the fifth lens is set as a convex surface, which compresses the vector height at the maximum aperture of the second side surface while converging the light, which is beneficial for reducing the total optical length and reducing the influence of temperature changes on imaging.

[0102] In an exemplary embodiment, the sixth lens may have positive power, and its first side surface may be, for example, a convex surface, and its second side surface may be, for example, a concave surface. The sixth lens is a positive lens, which is conducive to correcting aberrations such as spherical aberration and coma generated by the system, correcting the generated distortion, and realizing the small principal light angle characteristic of the optical lens. The first side surface of the sixth lens is set as a convex surface, which can converge the central field of view light and reduce the generation of spherical aberration. The second side surface of the sixth lens is set as a concave surface, which can appropriately diverge the light passing through the first side surface of the sixth lens, so that it has a larger image height on the image plane, realizing miniaturization and large image plane characteristics.

[0103] In an exemplary embodiment, the sixth lens may have a negative optical power, and its first side surface may be, for example, a convex surface, and its second side surface may be, for example, a concave surface. The sixth lens is a negative lens, which can adjust the deflection direction of the light emitted by the fifth lens, appropriately diverge the light, achieve a smooth transition of the light, and improve astigmatism and field curvature. The first side surface of the sixth lens is set as a convex surface, which is conducive to converging the central field of view light and reducing spherical aberration. The second side surface of the sixth lens is set as a concave surface, which can appropriately diverge the light passing through the first side surface of the sixth lens, so that it has a larger image height on the image plane, and realize miniaturization and large image surface characteristics.

[0104] In an exemplary embodiment, the sixth lens may have a negative optical power, and its first side surface may be, for example, a concave surface, and its second side surface may be, for example, a concave surface. The sixth lens is a negative lens, which can adjust the deflection direction of the light emitted by the fifth lens, appropriately diverge the light, achieve a smooth transition of the light, and improve astigmatism and field curvature. The shape of the sixth lens is double concave, which can effectively avoid excessive convergence of the light by the front lens, making the transition of the light smoother and reducing the sensitivity of the sixth lens. In addition, the first side surface of the sixth lens is a concave surface, which can effectively reduce the on-axis distance between the fifth lens and the sixth lens, which is beneficial to reducing the total optical length of the optical lens, increasing the back focal length, and facilitating the reasonable arrangement of the lenses.

[0105] In an exemplary embodiment, the optical lens may further include an aperture, which may be, for example, disposed between the second lens and the third lens. By disposing the aperture between the second lens and the third lens, it is advantageous for the light to smoothly transition to the rear of the system, reduce the aperture of the rear lens, and reduce the sensitivity of the optical lens during assembly. It should be understood that the aperture being disposed between the second lens and the third lens is merely exemplary, and the present application does not impose any specific limitation thereto, and the aperture may also be disposed at other locations according to actual needs.

[0106] In an exemplary embodiment, the first side surface of the second lens, the first side surface of the fourth lens, the second side surface of the fifth lens, and the first side surface and the second side surface of the sixth lens each have at least one inflection point. Through this arrangement, the marginal light can be better converged to the image plane, effectively reducing the generation of aberrations such as coma and field curvature, increasing the angle of the upper and lower light rays in the marginal field of view, and improving the relative illumination.

[0107] In an exemplary embodiment, the surfaces of the second lens, the fourth lens, the fifth lens, and the sixth lens may have one or more aspherical surfaces, which can reasonably control the deflection of light in each field of view, effectively reduce various aberrations such as spherical aberration, coma, and distortion, and improve the performance of the optical lens.

[0108] In an exemplary embodiment, the optical lens may further include a filter between the sixth lens and the image plane to filter light with different wavelengths. The optical lens may also be provided with a protective glass between the filter and the image plane according to actual needs to prevent internal components (e.g., chips) of the optical lens from being damaged.

[0109] In an exemplary embodiment, the optical lens may further include a photosensitive element disposed on the second side. Optionally, the photosensitive element disposed on the second side may be a charge coupled device (CCD) or a complementary metal oxide semiconductor (CMOS).

[0110] In an exemplary embodiment, the total optical length TTL of the optical lens and the total effective focal length F of the optical lens may satisfy: 1.5≤TTL / F≤2.8. Preferably, 1.7≤TTL / F≤2.65. Further, 2.206≤TTL / F≤2.500. By controlling this conditional expression, the miniaturization of the optical lens is achieved while ensuring that the optical lens meets a large field of view.

[0111] In an exemplary embodiment, the effective focal length F3 of the third lens and the total effective focal length F of the optical lens can satisfy: 0.25≤F3 / F≤1.7. Preferably, 0.45≤F3 / F≤1.5. Further, 0.623≤F3 / F≤1.460. By controlling this conditional expression, the third lens can have positive focal power and a smaller effective focal length, thereby enhancing the ability of the third lens to converge the light emitted by the second lens and reducing the total optical length; at the same time, the convex surface of the second side surface of the second lens can appropriately converge the light. By controlling the effective focal length of the third lens to be smaller, the light emitted by the second lens can be appropriately converged, reducing the generation of aberrations and achieving high resolution.

[0112] In an exemplary embodiment, the effective focal length F2 of the second lens and the total effective focal length F of the optical lens can satisfy: 1.45≤|F2 / F|. Preferably, 1.65≤|F2 / F|≤60. Further, 1.738≤|F2 / F|≤37.423. By controlling this conditional expression, the second lens can have a reasonable effective focal length, effectively adjust the degree of convergence of each field of view light on the image plane, correct various aberrations, and improve the resolution ability and overall optical performance of the optical lens. At the same time, the larger the absolute value of the effective focal length of the second lens, the smaller the absolute value of the optical power of the second lens, and the smaller the deflection ability of the second lens to light, which is conducive to achieving the low sensitivity characteristics of the second lens. It should be understood that the larger the absolute value of the effective focal length of the second lens is, the smaller the influence of the second lens on the trend of light. For example, the absolute value of the effective focal length of the second lens in Example 15 is 197.55. When the absolute value of the effective focal length of the second lens is greater than 197.55, especially when it is taken to infinity, the second lens has almost no influence on the trend of light, which is conducive to achieving a smooth transition of light.

[0113] In an exemplary embodiment, the radius of curvature R3 of the first side surface of the second lens, the radius of curvature R4 of the second side surface of the second lens and the total effective focal length F of the optical lens can satisfy: 1.0≤|F / R3|+|F / R4|≤3.0. Preferably, 1.2≤|F / R3|+|F / R4|≤2.9. Further, 1.286≤|F / R3|+|F / R4|≤2.827. The first side surface of the second lens is a concave surface, and the second side surface is a convex surface. By controlling the numerical range of the radius of curvature of the first side surface and the second side surface of the second lens, it is beneficial to achieve a smooth transition of light, thereby reducing the sensitivity of the second lens and achieving high resolution performance of the optical lens. At the same time, in combination with the concave surface of the second side surface of the first lens, the second lens can have a smaller light-clearance aperture and smoothly receive the light emitted by the first lens, which is beneficial to achieve the small aperture characteristics of the first side.

[0114] In an exemplary embodiment, the effective focal length F1 of the first lens and the total effective focal length F of the optical lens can satisfy: -3.5≤F1 / F≤-1.1. Preferably, -3.2≤F1 / F≤-1.25. Further, -3.000≤F1 / F≤-1.356. By controlling this conditional expression, the effective focal length of the first lens can be within a reasonable range, which is conducive to collecting as many large field of view lights as possible and realizing the large field of view characteristics of the optical lens; by cooperating with the second lens in a meniscus shape convex to the second side, the trend of the edge field of view light can be effectively fixed and smoothly transitioned to the rear system, which is conducive to reducing the generation of aberrations while realizing the large field of view characteristics and improving the imaging capability of the optical lens.

[0115] In an exemplary embodiment, the radius of curvature R1 of the first side surface of the first lens and the total effective focal length F of the optical lens may satisfy: 2.8≤|R1 / F|≤25. Preferably, 3≤|R1 / F|≤20. Further, 3.343≤|R1 / F|≤18.077. By controlling this conditional expression, the radius of curvature of the first side surface of the first lens can be within a reasonable range, so that light rays at a larger angle enter the first lens, thereby realizing the large field of view characteristic of the optical lens; the radius of curvature of the first side surface of the first lens is relatively large, which can reduce the degree of deflection of light rays at the first side surface, reduce the aberrations introduced by the large field of view, and improve the resolution capability of the optical lens.

[0116] In an exemplary embodiment, the on-axis distance d56 from the second side surface of the fifth lens to the first side surface of the sixth lens and the total optical length TTL of the optical lens can satisfy: d56 / TTL≤0.025. Preferably, 0.002≤d56 / TTL≤0.022. Further, 0.008≤d56 / TTL≤0.020. By controlling this conditional expression, the distance between the fifth lens and the sixth lens can be reduced, which is conducive to miniaturization of the optical lens; by reducing the on-axis distance between the cemented lens formed by the cementation of the fourth lens and the fifth lens and the sixth lens, and at the same time cooperating with the cemented lens, the light passing through the cemented lens reaches the image plane as soon as possible, reducing the light energy loss, reducing the total optical length of the optical lens, and improving the imaging quality.

[0117] In an exemplary embodiment, the back focal length BFL of the optical lens and the total optical length TTL of the optical lens may satisfy: 0.15≤BFL / TTL≤0.28. Preferably, 0.185≤BFL / TTL≤0.25. Further, 0.200≤BFL / TTL≤0.238. By controlling this conditional expression, the back focal length of the optical lens can be lengthened on the basis of achieving miniaturization, which is conducive to leaving enough assembly space for the module and improving the overall imaging performance of the optical lens.

[0118] In an exemplary embodiment, the maximum aperture D of the first side surface of the first lens corresponding to the maximum field angle of the optical lens, the image height H corresponding to the maximum field angle of the optical lens, and the total effective focal length F of the optical lens can satisfy: 0.08 mm -1 ≤D / H / F≤0.15 mm -1 Preferably, 0.095 mm -1 ≤D / H / F≤0.125 mm -1 . Further, 0.104 mm -1 ≤D / H / F≤0.119 mm -1 By controlling the conditional expression, when the ratio of image height to focal length is constant, the maximum effective aperture of the first side surface of the first lens corresponding to the maximum field angle of the optical lens can be constrained within a reasonable range, which is conducive to miniaturization of the optical lens.

[0119] In an exemplary embodiment, the radius of curvature R2 of the second side surface of the first lens and the maximum aperture D2 of the second side surface of the first lens corresponding to the maximum field angle of the optical lens can satisfy: 0.8≤R2 / D2≤3.6. Preferably, 1≤R2 / D2≤3.2. Further, 1.425≤R2 / D2≤2.782. By controlling this conditional expression, it is beneficial to reduce the incident height of the light on the first side surface of the second lens, achieve a small aperture characteristic, and ensure that the first lens has good processability.

[0120] In an exemplary embodiment, the effective focal length F4 of the fourth lens and the effective focal length F5 of the fifth lens may satisfy: 0.45≤|F4 / F5|≤3.5. Preferably, 0.6≤|F4 / F5|≤2.8. Further, 0.627≤|F4 / F5|≤1.591. By controlling this conditional expression, the absolute value of the effective focal length of the fourth lens and the effective focal length of the fifth lens can be made closer, which is conducive to achieving a smooth transition of light and improving image quality.

[0121] In an exemplary embodiment, the combined focal length F45 of the fourth lens and the fifth lens and the total effective focal length F of the optical lens can satisfy: 0.5≤F45 / F≤7. Preferably, 0.65≤F45 / F≤6. Further, 0.896≤F45 / F≤4.157. By controlling this conditional expression, the focal length of the cemented lens formed by the cementation of the fourth lens and the fifth lens can be positive, and the trend of light in the cemented lens can be effectively controlled. At the same time, the ratio of the focal length value of the cemented lens to the total focal length value of the optical lens can be constrained within a reasonable range, which is conducive to correcting the astigmatism, field curvature, and distortion generated therefrom, improving the imaging quality of the optical lens, and reducing the total optical length of the optical lens, thereby realizing the miniaturization of the optical lens.

[0122] In an exemplary embodiment, the sum of the air gaps ΣT between any two adjacent lenses from the first lens to the sixth lens on the optical axis and the total optical length TTL of the optical lens can satisfy: 0.045≤ΣT / TTL≤0.185. Preferably, 0.060≤ΣT / TTL≤0.160. Further, 0.081≤ΣT / TTL≤0.141. By controlling this conditional expression, the sum of all air gaps between the first lens to the sixth lens can be controlled within a reasonable range, which is beneficial to shorten the total optical length of the optical lens and realize the miniaturization of the optical lens; at the same time, it is also beneficial to reduce the angle change of light between two adjacent lenses, improve the overall optical performance of the optical lens, and make the layout of each lens in the optical lens reasonable, the deflection ability of the internal and external field light is appropriate, and the distortion and field curvature of the optical lens are reduced.

[0123] In an exemplary embodiment, the maximum effective aperture D12 of the second side of the sixth lens corresponding to the maximum field angle of the optical lens and the image height H corresponding to the maximum field angle of the optical lens can satisfy: 0.5≤D12 / H≤1.2. Preferably, 0.7≤D12 / H≤1.0. Further, 0.749≤D12 / H≤0.976. By controlling this conditional expression, it is beneficial to achieve the small principal light angle characteristic of the optical lens.

[0124] In an exemplary 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 arc value θ of the maximum field of view angle of the optical lens may satisfy: |(HF×θ) / (F×θ)|≤0.15. Preferably, 0.008≤|(HF×θ) / (F×θ)|≤0.125. Further, 0.010≤|(HF×θ) / (F×θ)|≤0.086. By controlling this conditional formula, when the field of view angle and image height are constant, the total effective focal length of the optical lens can be controlled within a reasonable range, thereby reducing the distortion of the optical lens.

[0125] In an exemplary embodiment, the vector height SAG11 of the first side surface of the sixth lens and the maximum effective aperture D11 of the first side surface of the sixth lens corresponding to the maximum field angle of the optical lens can satisfy: |SAG11 / D11|≤0.15. Preferably, |SAG11 / D11|≤0.12. Further, 0.003≤|SAG11 / D11|≤0.086. By controlling this conditional expression, the vector height of the first side surface of the sixth lens can be made smaller, which is beneficial to the smooth transition of light to the rear system and reduces the sensitivity of the optical lens. At the same time, the smaller vector height is beneficial to the design of the mold used to make the sixth lens, reducing the tolerance of the surface shape of the sixth lens in the actual production process.

[0126] In an exemplary embodiment, the curvature radius R3 of the first side surface of the second lens and the curvature radius R4 of the second side surface of the second lens may satisfy: 0.5≤R3 / R4≤15. Preferably, 0.65≤R3 / R4≤12. Further, 0.763≤R3 / R4≤10.305. By controlling this conditional expression, the curvature radius of the first side surface and the second side surface of the second lens can be close, so that the light smoothly transitions to the rear system, and the angle between the light and the optical axis is reduced, thereby realizing a small aperture of the optical lens.

[0127] In an exemplary embodiment, the radius of curvature R5 of the first side surface of the third lens and the total effective focal length F of the optical lens may satisfy: 0.5≤R5 / F≤1.8. Preferably, 0.6≤R5 / F≤1.6. Further, 0.772≤R5 / F≤1.382. By controlling this conditional expression, the optical power of the third lens can be enhanced, which is beneficial for the third lens to converge light and realize the miniaturization of the optical lens. At the same time, the degree of deflection of light in the third lens can be within a reasonable range, avoiding excessive deflection of light caused by excessive radius of curvature of the first side surface of the third lens, reducing spherical aberration, and improving the optical performance of the optical lens.

[0128] In an exemplary embodiment, the center thickness d8 of the fourth lens on the optical axis, the center thickness d9 of the fifth lens on the optical axis and the total optical length TTL of the optical lens can satisfy: 0.225≤(d8+d9) / TTL≤0.4. Preferably, 0.250≤(d8+d9) / TTL≤0.350. Further, 0.268≤(d8+d9) / TTL≤0.336. By controlling this conditional expression, the center thickness of the cemented lens formed by the cementation of the fourth lens and the fifth lens can be controlled, which is beneficial to the smooth transition of the edge field of view light to the rear system, and compresses the angle between the light and the image plane, improves the relative illumination, facilitates the layout of the lens, reduces the difficulty of processing, avoids the large total optical length caused by the large center thickness of the cemented lens, and is beneficial to the miniaturization of the optical lens.

[0129] In an exemplary embodiment, the effective focal length F6 of the sixth lens and the total effective focal length F of the optical lens satisfy: 0.75≤|F6 / F|. Preferably, 0.85≤|F6 / F|≤85. Further, 0.903≤|F6 / F|≤82.425. By controlling this conditional expression, the sixth lens can hardly deflect the incident light, reduce the degree of deflection of the light in the sixth lens, and make it smoothly transition to the rear image plane, better match the large-size chip, and improve the imaging quality. It should be understood that the larger the absolute value of the effective focal length of the sixth lens, the smaller the effect of the sixth lens on the trend of light. For example, the absolute value of the effective focal length of the sixth lens in Example 10 is 428.6. When the absolute value of the effective focal length of the sixth lens is greater than 428.6, especially when it is taken to infinity, the sixth lens has almost no effect on the trend of light, which is conducive to achieving a smooth transition of light.

[0130] In an exemplary embodiment, the center thickness d6 of the third lens on the optical axis and the total optical length TTL of the optical lens can satisfy: 0.15≤d6 / TTL≤0.24. Preferably, 0.165≤d6 / TTL≤0.22. Further, 0.175≤d6 / TTL≤0.200. By controlling this conditional expression, the third lens is controlled to have a larger center thickness, which is conducive to reducing the sensitivity of the third lens. In combination with the smaller positive effective focal length of the third lens, the light is appropriately converged while reducing the generation of aberrations and improving the resolution capability.

[0131] In an exemplary 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 can satisfy: |R5 / R6|≤2. Preferably, |R5 / R6|≤1.8. Further, 0.007≤|R5 / R6|≤1.389. By controlling this conditional expression, the surface shape of the second side surface is made smoother than that of the first side surface, so that the first side surface appropriately converges the light passing through the aperture and is smoothly transitioned to the rear system on the second side surface. At the same time, the third lens is controlled to have a larger center thickness, so as to further achieve a smooth transition of light and reduce the sensitivity of the third lens.

[0132] In an exemplary embodiment, the total effective focal length F of the optical lens and the image height H corresponding to the maximum field angle of the optical lens may satisfy: 0.65≤F / H≤0.8. Preferably, 0.69≤F / H≤0.77. Further, 0.694≤F / H≤0.746. By controlling this conditional expression, it is beneficial to improve the imaging quality of each field area of ​​the overall system.

[0133] In an exemplary embodiment, the total optical length TTL of the optical lens, the image height H corresponding to the maximum field of view of the optical lens, and the maximum field of view FOV of the optical lens can satisfy: TTL / H / FOV×1°≤0.028. Preferably, 0.018≤TTL / H / FOV×1°≤0.025. Further, 0.020≤TTL / H / FOV×1°≤0.023. By controlling this conditional expression, it is beneficial to realize the miniaturization of the optical lens, increase the image plane, and realize the large field of view characteristic.

[0134] In an exemplary embodiment, the total effective focal length F of the optical lens and the entrance pupil diameter ENPD of the optical lens may satisfy: 1.85≤F / ENPD≤2.4. Preferably, 2≤F / ENPD≤2.25. Further, 2.200≤F / ENPD≤2.240. By controlling this conditional expression, it is beneficial to achieve a high light throughput of the optical lens.

[0135] In an exemplary embodiment, the on-axis distance d34 from the second side surface of the third lens to the first side surface of the fourth lens and the total optical length TTL of the optical lens may satisfy: d34 / TTL≤0.05. Preferably, d34 / TTL≤0.04. Further, 0.008≤d34 / TTL≤0.034. By controlling this conditional expression, it is beneficial to reduce the total optical length of the optical lens, and at the same time, the light emitted from the third lens enters the cemented lens formed by the fourth lens and the fifth lens as quickly as possible, so as to smooth the light trend and improve the resolution.

[0136] In an exemplary embodiment, the radius of curvature R5 of the first side surface of the third lens and the center thickness d6 of the third lens on the optical axis may satisfy: 1.25≤R5 / d6≤3.5. Preferably, 1.5≤R5 / d6≤3.2. Further, 1.834≤R5 / d6≤2.914. By controlling this conditional expression, the first side surface of the third lens effectively converges the light, while reducing the sensitivity of the third lens.

[0137] In an exemplary embodiment, the radius of curvature R6 of the second side surface of the third lens and the total optical length TTL of the optical lens may satisfy: |R6 / TTL|≤60. Preferably, 0.2≤|R6 / TTL|≤55. Further, 0.418≤|R6 / TTL|≤49.967. By controlling this conditional expression, it is beneficial to achieve a smooth transition of light on the second side surface of the third lens and reduce the sensitivity of the third lens.

[0138] In an exemplary embodiment, the radius of curvature R3 of the first side surface of the second lens and the total optical length TTL of the optical lens may satisfy: -6.5≤R3 / TTL≤-0.25. Preferably, -5≤R3 / TTL≤-0.4. Further, -3.977≤R3 / TTL≤-0.305. By controlling this conditional expression,

[0139] The optical lens according to the above-mentioned embodiment of the present application may adopt multiple lenses, such as the six lenses mentioned above. By reasonably allocating the optical parameters of each lens, the optical lens is achieved with small aperture, miniaturization, high resolution, low sensitivity, large angular resolution, large field of view, back focal length, small distortion, small main light angle, high illumination and processability, and can be well matched with, for example, vehicle-mounted chips without producing dark corners. The optical lens has good temperature performance, small changes in imaging effects under high and low temperatures, and stable image quality. Therefore, the optical lens according to the above-mentioned embodiment of the present application can better meet the requirements of, for example, vehicle-mounted applications.

[0140] Those skilled in the art should understand that the total optical length TTL of the optical lens used above refers to the on-axis distance from the first side surface of the first lens to the imaging plane or the image source plane; the back focal length BFL of the optical lens refers to the on-axis distance from the second side surface of the sixth lens to the imaging plane or the image source plane; and the maximum field of view FOV of the optical lens is associated with the image height H, which refers to the field of view corresponding to the image height H.

[0141] 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 optical lens can be changed to obtain the various results and advantages described in this specification. For example, although six lenses are described as an example in the embodiment, the optical lens is not limited to including six lenses. If necessary, the optical lens may also include other numbers of lenses.

[0142] Specific embodiments of the optical lens applicable to the above-mentioned embodiments are further described below with reference to the accompanying drawings.

[0143] Example 1

[0144] The following reference Figure 1 An optical lens according to Example 1 of the present application is described.

[0145] like Figure 1As shown, the optical lens includes, from the first side to the second side along the optical axis, a first lens L1, a second lens L2, a third lens L3, a fourth lens L4, a fifth lens L5 and a sixth lens L6. The aperture STO can be disposed between the second lens L2 and the third lens L3. The fourth lens L4 and the fifth lens L5 are cemented to form a cemented lens. The first side surface S8 of the fourth lens L4, the first side surface S11 and the second side surface S12 of the sixth lens L6 have at least one inflection point.

[0146] The first lens L1 has negative refractive power, and its first side surface S1 is a convex surface, and its second side surface S2 is a concave surface.

[0147] The second lens L2 has positive refractive power, a first side surface S3 thereof is a concave surface, and a second side surface S4 thereof is a convex surface.

[0148] The third lens L3 has positive refractive power, and its first side surface S6 is a convex surface, and its second side surface S7 is a convex surface.

[0149] The fourth lens L4 has negative refractive power, and its first side surface S8 is concave, and its second side surface S9 is concave.

[0150] The fifth lens L5 has positive refractive power, and its first side surface is a convex surface, and its second side surface S10 is a convex surface.

[0151] The sixth lens L6 has negative refractive power, and its first side surface S11 is convex, and its second side surface S12 is concave.

[0152] An image plane IMA is disposed on the second side of the optical lens, and a filter IR and a protective glass CG are disposed between the sixth lens L6 and the image plane IMA. The filter IR has a first side surface S13 and a second side surface S14, and the protective glass CG has a first side surface S15 and a second side surface S16. When IMA is an imaging plane, light from an object passes through each surface in sequence and is finally imaged on IMA. When IMA is an image source plane, light from IMA passes through each surface in sequence and is finally projected on the object.

[0153] Table 1 shows the basic parameters of the optical lens of Example 1.

[0154] Table 1

[0155]

[0156] In Example 1, the first side surface S3 and the second side surface S4 of the second lens L2, the first side surface S8 of the fourth lens L4 to the second side surface S12 of the sixth lens L6 are all aspherical surfaces, and the surface shape of each aspherical surface can be defined by but not limited to the following aspherical surface formula:

[0157] (1)

[0158] in, x is the distance vector height from the vertex of the aspheric surface when the aspheric surface is at a height of h along the optical axis; c is the paraxial curvature of the aspheric surface, c=1 / R (i.e., the paraxial curvature c is the reciprocal of the curvature radius R in Table 1 above); k is the cone coefficient; Ai is the correction coefficient of the i-th order of the aspheric surface. Table 2 shows the cone coefficient k and the high-order coefficients A4, A6, A8, A10, A12, A14 and A16 that can be used for each aspheric surface S3, S4, S8, S9, S10, S11 and S12 in Example 1.

[0159] Table 2

[0160]

[0161] from Figure 2 From the above, the MTF peak value of the central field of view of the optical lens of Example 1 at the spatial frequency of 60 lp / mm (60 line pairs / mm) exceeds 0.85. Therefore, the optical lens provided in Example 1 has good imaging quality.

[0162] Example 2

[0163] The following reference Figure 3 The optical lens according to Embodiment 2 of the present application is described. Figure 3 As shown, compared with Example 1, the main differences of this embodiment are that: the optical parameters such as the curvature radius of each lens surface and the lens thickness are different; and the second side surface S10 of the fifth lens L5, the first side surface S11 and the second side surface S12 of the sixth lens L6 have at least one inflection point.

[0164] Table 3 shows the basic parameters of the optical lens of Example 2.

[0165] Table 3

[0166]

[0167] In Example 2, the first side surface S3 and the second side surface S4 of the second lens L2, the first side surface S8 of the fourth lens L4 to the second side surface S12 of the sixth lens L6 are all aspherical surfaces. Table 4 shows the cone coefficient k and the high-order coefficients A4, A6, A8, A10, A12, A14 and A16 of the aspherical surfaces S3, S4, S8, S9, S10, S11 and S12 that can be used in Example 2.

[0168] Table 4

[0169]

[0170] from Figure 4From the above, the MTF peak value of the central field of view of the optical lens of Example 2 at the spatial frequency of 60 lp / mm (60 line pairs / mm) exceeds 0.85. Therefore, the optical lens provided in Example 2 has good imaging quality.

[0171] Example 3

[0172] The following reference Figure 5 The optical lens according to Embodiment 3 of the present application is described. Figure 5 As shown, compared with Example 1, the main differences of this embodiment are: the optical parameters such as the curvature radius of each lens surface and the lens thickness are different; the first side surface S1 of the first lens L1 is a concave surface; the first side surface S11 and the second side surface S12 of the sixth lens L6 have at least one inflection point.

[0173] Table 5 shows the basic parameter table of the optical lens of Example 3.

[0174] Table 5

[0175]

[0176] In Example 3, the first side surface S3 and the second side surface S4 of the second lens L2, the first side surface S8 of the fourth lens L4 to the second side surface S12 of the sixth lens L6 are all aspherical surfaces. Table 6 shows the cone coefficient k and the high-order coefficients A4, A6, A8, A10, A12, A14 and A16 of the aspherical surfaces S3, S4, S8, S9, S10, S11 and S12 that can be used in Example 3.

[0177] Table 6

[0178]

[0179] from Figure 6 From the above, the MTF peak value of the central field of view of the optical lens of Example 3 at the spatial frequency of 60 lp / mm (60 line pairs / mm) exceeds 0.85. Therefore, the optical lens provided in Example 3 has good imaging quality.

[0180] Example 4

[0181] The following reference Figure 7 The optical lens according to Embodiment 4 of the present application is described. Figure 7 As shown, compared with Example 1, the main differences of this embodiment are: the optical parameters such as the curvature radius of each lens surface and the lens thickness are different; the first side surface S1 of the first lens L1 is a concave surface; the first side surface S3 of the second lens L2, the first side surface S11 and the second side surface S12 of the sixth lens L6 have at least one inflection point.

[0182] Table 7 shows the basic parameter table of the optical lens of Example 4.

[0183] Table 7

[0184]

[0185] In Example 4, the first side surface S3 and the second side surface S4 of the second lens L2, the first side surface S8 of the fourth lens L4 to the second side surface S12 of the sixth lens L6 are all aspherical surfaces. Table 8 shows the conic coefficients and the high-order coefficients A4, A6, A8, A10, A12, A14 and A16 of the aspherical surfaces S3, S4, S8, S9, S10, S11 and S12 that can be used in Example 4.

[0186] Table 8

[0187]

[0188] from Figure 8 From the above, the MTF peak value of the central field of view of the optical lens of Example 4 at the spatial frequency of 60 lp / mm (60 line pairs / mm) exceeds 0.85. Therefore, the optical lens of Example 4 has good imaging quality.

[0189] Example 5

[0190] The following reference Fig. 9 The optical lens according to Embodiment 5 of the present application is described. Fig. 9 As shown, the main differences between this embodiment and Embodiment 1 are: the optical parameters such as the curvature radius of each lens surface and the lens thickness are different; and the second side surface S7 of the third lens L3 is a concave surface; the first lens to the sixth lens in the optical lens shown in this embodiment do not have an inflection point.

[0191] Table 9 shows the basic parameter table of the optical lens of Example 5.

[0192] Table 9

[0193]

[0194] In Example 5, the first side surface S3 and the second side surface S4 of the second lens L2, the first side surface S8 of the fourth lens L4 to the second side surface S12 of the sixth lens L6 are all aspherical surfaces. Table 10 shows the conic coefficients and the high-order coefficients A4, A6, A8, A10, A12, A14 and A16 of the aspherical surfaces S3, S4, S8, S9, S10, S11 and S12 that can be used in Example 5.

[0195] Table 10

[0196]

[0197] from Fig.10 From the above, the MTF peak value of the central field of view of the optical lens of Example 5 at the spatial frequency of 60 lp / mm (60 line pairs / mm) exceeds 0.85. Therefore, the optical lens of Example 5 has good imaging quality.

[0198] Example 6

[0199] The following reference Fig.11 The optical lens according to Example 6 of the present application is described. Fig.11 As shown, compared with Example 1, the main differences of this embodiment are: the optical parameters such as the curvature radius of each lens surface and the lens thickness are different; the second side surface S7 of the third lens L3 is a concave surface; the first side surface S11 and the second side surface S12 of the sixth lens L6 have at least one inflection point.

[0200] Table 11 shows the basic parameter table of the optical lens of Example 6.

[0201] Table 11

[0202]

[0203] In Example 6, the first side surface S3 and the second side surface S4 of the second lens L2, the first side surface S8 of the fourth lens L4 to the second side surface S12 of the sixth lens L6 are all aspherical surfaces. Table 12 shows the cone coefficients and the high-order coefficients A4, A6, A8, A10, A12, A14 and A16 of the aspherical surfaces S3, S4, S8, S9, S10, S11 and S12 that can be used in Example 6.

[0204] Table 12

[0205]

[0206] from Fig.12 From the above, the MTF peak value of the central field of view of the optical lens of Example 6 at the spatial frequency of 60 lp / mm (60 line pairs / mm) exceeds 0.85. Therefore, the optical lens of Example 6 has good imaging quality.

[0207] Example 7

[0208] The following reference Fig.13 The optical lens according to Example 7 of the present application is described. Fig.13 As shown, compared with Example 1, the main differences of this embodiment are: the optical parameters such as the curvature radius of each lens surface and the lens thickness are different; the first side surface S8 of the fourth lens L4 is a convex surface; and the first side surface S11 and the second side surface S12 of the sixth lens L6 have at least one inflection point.

[0209] Table 13 shows the basic parameter table of the optical lens of Example 7.

[0210] Table 13

[0211]

[0212] In Example 7, the first side surface S3 and the second side surface S4 of the second lens L2, the first side surface S8 of the fourth lens L4 to the second side surface S12 of the sixth lens L6 are all aspherical surfaces. Table 14 shows the cone coefficients and the high-order coefficients A4, A6, A8, A10, A12, A14 and A16 of the aspherical surfaces S3, S4, S8, S9, S10, S11 and S12 that can be used in Example 7.

[0213] Table 14

[0214]

[0215] from Fig.14 From the above, the MTF peak value of the central field of view of the optical lens of Example 7 at the spatial frequency of 60 lp / mm (60 line pairs / mm) exceeds 0.85. Therefore, the optical lens of Example 7 has good imaging quality.

[0216] Example 8

[0217] The following reference Fig.15 The optical lens according to Example 8 of the present application is described. Fig.15 As shown, compared with Example 1, the main differences of this embodiment are: the optical parameters such as the curvature radius of each lens surface and the lens thickness are different; the first side surface S8 of the fourth lens L4 is a convex surface; and the first side surface S11 and the second side surface S12 of the sixth lens L6 have at least one inflection point.

[0218] Table 15 shows the basic parameter table of the optical lens of Example 8.

[0219] Table 15

[0220]

[0221] In Example 8, the first side surface S3 and the second side surface S4 of the second lens L2, the first side surface S8 of the fourth lens L4 to the second side surface S12 of the sixth lens L6 are all aspherical surfaces. Table 16 shows the cone coefficients and the high-order coefficients A4, A6, A8, A10, A12, A14 and A16 of the aspherical surfaces S3, S4, S8, S9, S10, S11 and S12 that can be used in Example 8.

[0222] Table 16

[0223]

[0224] from Fig.16 From the above, the MTF peak value of the central field of view of the optical lens of Example 8 at the spatial frequency of 60 lp / mm (60 line pairs / mm) exceeds 0.85. Therefore, the optical lens of Example 8 has good imaging quality.

[0225] Example 9

[0226] The following reference Fig.17 The optical lens according to Example 9 of the present application is described. Fig.17 As shown, compared with Example 1, the main differences of this embodiment are: the optical parameters such as the curvature radius of each lens surface and the lens thickness are different; the second side surface S7 of the third lens L3 is a concave surface; the fourth lens L4 has positive optical power, the first side surface S8 of the fourth lens L4 is a convex surface, and the second side surface S9 is a convex surface; the fifth lens L5 has negative optical power, and the first side surface of the fifth lens L5 is a concave surface; the sixth lens L6 has positive optical power; the second side surface S10 of the fifth lens L5 and the second side surface S12 of the sixth lens L6 have at least one inflection point.

[0227] Table 17 shows the basic parameter table of the optical lens of Example 9.

[0228] Table 17

[0229]

[0230] In Example 9, the first side surface S3 and the second side surface S4 of the second lens L2, the first side surface S8 of the fourth lens L4 to the second side surface S12 of the sixth lens L6 are all aspherical surfaces. Table 18 shows the conic coefficients and the high-order coefficients A4, A6, A8, A10, A12, A14 and A16 of the aspherical surfaces S3, S4, S8, S9, S10, S11 and S12 that can be used in Example 9.

[0231] Table 18

[0232]

[0233] from Fig.18 From the above, the MTF peak value of the central field of view of the optical lens of Example 9 at the spatial frequency of 60 lp / mm (60 line pairs / mm) exceeds 0.85. Therefore, the optical lens of Example 9 has good imaging quality.

[0234] Example 10

[0235] The following reference Fig.19 The optical lens according to embodiment 10 of the present application is described. Fig.19As shown, compared with Example 1, the main differences of this embodiment are: the optical parameters such as the curvature radius of each lens surface and the lens thickness are different; the second side surface S7 of the third lens L3 is a concave surface; the fourth lens L4 has positive optical power, the first side surface S8 of the fourth lens L4 is a convex surface, and the second side surface S9 is a convex surface; the fifth lens L5 has negative optical power, and the first side surface of the fifth lens L5 is a concave surface; the sixth lens L6 has positive optical power; the second side surface S10 of the fifth lens L5 and the second side surface S12 of the sixth lens L6 have at least one inflection point.

[0236] Table 19 shows the basic parameter table of the optical lens of Example 10.

[0237] Table 19

[0238]

[0239] In Example 10, the first side surface S3 and the second side surface S4 of the second lens L2, the first side surface S8 of the fourth lens L4 to the second side surface S12 of the sixth lens L6 are all aspherical surfaces. Table 20 shows the cone coefficients and the high-order coefficients A4, A6, A8, A10, A12, A14 and A16 of the aspherical surfaces S3, S4, S8, S9, S10, S11 and S12 that can be used in Example 10.

[0240] Table 20

[0241]

[0242] from Fig. 20 From the above, the MTF peak value of the central field of view of the optical lens of Example 10 at the spatial frequency of 60 lp / mm (60 line pairs / mm) exceeds 0.85. Therefore, the optical lens of Example 10 has good imaging quality.

[0243] Embodiment 11

[0244] The following reference Fig.21 The optical lens according to Example 11 of the present application is described. Fig.21 As shown, compared with Example 1, the main differences of this embodiment are: the optical parameters such as the curvature radius of each lens surface and the lens thickness are different; the second side surface S7 of the third lens L3 is a concave surface; the fourth lens L4 has positive optical power, the first side surface S8 of the fourth lens L4 is a convex surface, and the second side surface S9 is a convex surface; the fifth lens L5 has negative optical power, and the first side surface of the fifth lens L5 is a concave surface; the second side surface S10 of the fifth lens L5 and the second side surface S12 of the sixth lens L6 have at least one inflection point.

[0245] Table 21 shows the basic parameter table of the optical lens of Example 11.

[0246] Table 21

[0247]

[0248] In Example 11, the first side surface S3 and the second side surface S4 of the second lens L2, the first side surface S8 of the fourth lens L4 to the second side surface S12 of the sixth lens L6 are all aspherical surfaces. Table 22 shows the cone coefficients and the high-order coefficients A4, A6, A8, A10, A12, A14 and A16 of the aspherical surfaces S3, S4, S8, S9, S10, S11 and S12 that can be used in Example 11.

[0249] Table 22

[0250]

[0251] from Fig. 22 From the above, the MTF peak value of the central field of view of the optical lens of Example 11 at the spatial frequency of 60 lp / mm (60 line pairs / mm) exceeds 0.85. Therefore, the optical lens of Example 11 has good imaging quality.

[0252] Example 12

[0253] The following reference Fig.23 The optical lens according to Example 12 of the present application is described. Fig.23 As shown, compared with Example 1, the main differences of this embodiment are: the optical parameters such as the curvature radius of each lens surface and the lens thickness are different; the second side surface S7 of the third lens L3 is a concave surface; the fourth lens L4 has positive optical power, the first side surface S8 of the fourth lens L4 is a convex surface, and the second side surface S9 is a convex surface; the fifth lens L5 has negative optical power, and the first side surface of the fifth lens L5 is a concave surface; the second side surface S10 of the fifth lens L5 and the second side surface S12 of the sixth lens L6 have at least one inflection point.

[0254] Table 23 shows the basic parameter table of the optical lens of Example 12.

[0255] Table 23

[0256]

[0257] In Example 12, the first side surface S3 and the second side surface S4 of the second lens L2, the first side surface S8 of the fourth lens L4 to the second side surface S12 of the sixth lens L6 are all aspherical surfaces. Table 24 shows the conic coefficients and the high-order coefficients A4, A6, A8, A10, A12, A14 and A16 of the aspherical surfaces S3, S4, S8, S9, S10, S11 and S12 that can be used in Example 12.

[0258] Table 24

[0259]

[0260] from Fig.24 From the above, the MTF peak value of the central field of view of the optical lens of Example 12 at the spatial frequency of 60 lp / mm (60 line pairs / mm) exceeds 0.85. Therefore, the optical lens of Example 12 has good imaging quality.

[0261] Embodiment 13

[0262] The following reference Fig.25 The optical lens according to embodiment 13 of the present application is described. Fig.25 As shown, compared with Example 1, the main differences of this embodiment are: the optical parameters such as the curvature radius of each lens surface and the lens thickness are different; the first side surface S11 of the sixth lens L6 is a concave surface; and the second side surface S12 of the sixth lens L6 has at least one inflection point.

[0263] Table 25 shows the basic parameter table of the optical lens of Example 13.

[0264] Table 25

[0265]

[0266] In Example 13, the first side surface S3 and the second side surface S4 of the second lens L2, the first side surface S8 of the fourth lens L4 to the second side surface S12 of the sixth lens L6 are all aspherical surfaces. Table 26 shows the cone coefficients and the high-order coefficients A4, A6, A8, A10, A12, A14 and A16 of the aspherical surfaces S3, S4, S8, S9, S10, S11 and S12 that can be used in Example 13.

[0267] Table 26

[0268]

[0269] from Fig.26 From the above, the MTF peak value of the central field of view of the optical lens of Example 13 at the spatial frequency of 60 lp / mm (60 line pairs / mm) exceeds 0.85. Therefore, the optical lens of Example 13 has good imaging quality.

[0270] Embodiment 14

[0271] The following reference Fig. 27 The optical lens according to embodiment 14 of the present application is described. Fig. 27 As shown, compared with Example 1, the main differences of this embodiment are: the optical parameters such as the curvature radius of each lens surface and the lens thickness are different; the first side surface S11 of the sixth lens L6 is a concave surface; and the second side surface S12 of the sixth lens L6 has at least one inflection point.

[0272] Table 27 shows the basic parameter table of the optical lens of Example 14.

[0273] Table 27

[0274]

[0275] In Example 14, the first side surface S3 and the second side surface S4 of the second lens L2, the first side surface S8 of the fourth lens L4 to the second side surface S12 of the sixth lens L6 are all aspherical surfaces. Table 28 shows the cone coefficients and the high-order coefficients A4, A6, A8, A10, A12, A14 and A16 of the aspherical surfaces S3, S4, S8, S9, S10, S11 and S12 that can be used in Example 14.

[0276] Table 28

[0277]

[0278] from Fig.28 From the above, the MTF peak value of the central field of view of the optical lens of Example 14 at the spatial frequency of 60 lp / mm (60 line pairs / mm) exceeds 0.85. Therefore, the optical lens of Example 14 has good imaging quality.

[0279] Embodiment 15

[0280] The following reference Fig.29 The optical lens according to embodiment 15 of the present application is described. Fig.29 As shown, compared with Example 1, the main differences of this embodiment are: the optical parameters such as the curvature radius of each lens surface and the lens thickness are different; the first side surface S1 of the first lens L1 is a concave surface; the second lens L2 has negative optical power; the second side surface S7 of the third lens L3 is a concave surface; the first side surface S11 and the second side surface S12 of the sixth lens L6 have at least one inflection point.

[0281] Table 29 shows the basic parameter table of the optical lens of Example 15.

[0282] Table 29

[0283]

[0284] In Example 15, the first side surface S3 and the second side surface S4 of the second lens L2, the first side surface S8 of the fourth lens L4 to the second side surface S12 of the sixth lens L6 are all aspherical surfaces. Table 30 shows the cone coefficients and the high-order coefficients A4, A6, A8, A10, A12, A14 and A16 of the aspherical surfaces S3, S4, S8, S9, S10, S11 and S12 that can be used in Example 15.

[0285] Table 30

[0286]

[0287] from Fig.30 From the above, the MTF peak value of the central field of view of the optical lens of Example 15 at the spatial frequency of 60 lp / mm (60 line pairs / mm) exceeds 0.85. Therefore, the optical lens of Example 15 has good imaging quality.

[0288] Example 16

[0289] The following reference Fig.31 The optical lens according to Example 16 of the present application is described. Fig.31 As shown, compared with Example 1, the main differences of this embodiment are: the optical parameters such as the curvature radius of each lens surface and the lens thickness are different; the first side surface S1 of the first lens L1 is a concave surface; the second lens L2 has negative optical power; the second side surface S7 of the third lens L3 is a concave surface; the first side surface S11 and the second side surface S12 of the sixth lens L6 have at least one inflection point.

[0290] Table 31 shows the basic parameter table of the optical lens of Example 16.

[0291] Table 31

[0292]

[0293] In Example 16, the first side surface S3 and the second side surface S4 of the second lens L2, the first side surface S8 of the fourth lens L4 to the second side surface S12 of the sixth lens L6 are all aspherical surfaces. Table 32 shows the cone coefficients and the high-order coefficients A4, A6, A8, A10, A12, A14 and A16 of the aspherical surfaces S3, S4, S8, S9, S10, S11 and S12 that can be used in Example 16.

[0294] Table 32

[0295]

[0296] from Fig.32 From the above, the MTF peak value of the central field of view of the optical lens of Example 16 at the spatial frequency of 60 lp / mm (60 line pairs / mm) exceeds 0.85. Therefore, the optical lens of Example 16 has good imaging quality.

[0297] Embodiment 17

[0298] The following reference Fig.33 The optical lens according to Example 17 of the present application is described. Fig.33As shown, compared with Example 1, the main differences of this embodiment are: the optical parameters such as the curvature radius of each lens surface and the lens thickness are different; the second lens L2 has negative optical power; and the first side surface S11 and the second side surface S12 of the sixth lens L6 have at least one inflection point.

[0299] Table 33 shows the basic parameter table of the optical lens of Example 17.

[0300] Table 33

[0301]

[0302] In Example 17, the first side surface S3 and the second side surface S4 of the second lens L2, the first side surface S8 of the fourth lens L4 to the second side surface S12 of the sixth lens L6 are all aspherical surfaces. Table 34 shows the cone coefficients and the high-order coefficients A4, A6, A8, A10, A12, A14 and A16 of the aspherical surfaces S3, S4, S8, S9, S10, S11 and S12 that can be used in Example 17.

[0303] Table 34

[0304]

[0305] from Fig.34 From the above, the MTF peak value of the central field of view of the optical lens of Example 17 at the spatial frequency of 60 lp / mm (60 line pairs / mm) exceeds 0.85. Therefore, the optical lens of Example 17 has good imaging quality.

[0306] Embodiment 18

[0307] The following reference Fig.35 The optical lens according to Example 18 of the present application is described. Fig.35 As shown, compared with Example 1, the main differences of this embodiment are: the optical parameters such as the curvature radius of each lens surface and the lens thickness are different; the second lens L2 has negative optical power; and the first side surface S11 and the second side surface S12 of the sixth lens L6 have at least one inflection point.

[0308] Table 35 shows the basic parameter table of the optical lens of Example 18.

[0309] Table 35

[0310]

[0311] In Example 18, the first side surface S3 and the second side surface S4 of the second lens L2, the first side surface S8 of the fourth lens L4 to the second side surface S12 of the sixth lens L6 are all aspherical surfaces. Table 36 shows the cone coefficients and the high-order coefficients A4, A6, A8, A10, A12, A14 and A16 of the aspherical surfaces S3, S4, S8, S9, S10, S11 and S12 that can be used in Example 18.

[0312] Table 36

[0313]

[0314] from Fig.36 From the above, the MTF peak value of the central field of view of the optical lens of Example 18 at the spatial frequency of 60 lp / mm (60 line pairs / mm) exceeds 0.85. Therefore, the optical lens of Example 18 has good imaging quality.

[0315] Embodiment 19

[0316] The following reference Fig.37 The optical lens according to Example 19 of the present application is described. Fig.37 As shown, the main differences between this embodiment and Embodiment 1 are: the optical parameters such as the curvature radius of each lens surface and the lens thickness are different; the second lens L2 has negative optical power; and the first side surface S8 of the fourth lens L4 is a convex surface.

[0317] Table 37 shows the basic parameter table of the optical lens of Example 19.

[0318] Table 37

[0319]

[0320] In Example 19, the first side surface S3 and the second side surface S4 of the second lens L2, the first side surface S8 of the fourth lens L4 to the second side surface S12 of the sixth lens L6 are all aspherical surfaces. Table 38 shows the conic coefficients and the high-order coefficients A4, A6, A8, A10, A12, A14 and A16 of the aspherical surfaces S3, S4, S8, S9, S10, S11 and S12 that can be used in Example 19.

[0321] Table 38

[0322]

[0323] from Fig.38 From the above, the MTF peak value of the central field of view of the optical lens of Example 19 at the spatial frequency of 60 lp / mm (60 line pairs / mm) exceeds 0.85. Therefore, the optical lens of Example 19 has good imaging quality.

[0324] Embodiment 20

[0325] The following reference Fig.39 The optical lens according to embodiment 20 of the present application is described. Fig.39 As shown, the main differences between this embodiment and Embodiment 1 are: the optical parameters such as the curvature radius of each lens surface and the lens thickness are different; the second lens L2 has negative optical power; and the first side surface S8 of the fourth lens L4 is a convex surface.

[0326] Table 39 shows the basic parameter table of the optical lens of Example 20.

[0327] Table 39

[0328]

[0329] In Example 20, the first side surface S3 and the second side surface S4 of the second lens L2, the first side surface S8 of the fourth lens L4 to the second side surface S12 of the sixth lens L6 are all aspherical surfaces. Table 40 shows the conic coefficients and the high-order coefficients A4, A6, A8, A10, A12, A14 and A16 of the aspherical surfaces S3, S4, S8, S9, S10, S11 and S12 that can be used in Example 20.

[0330] Table 40

[0331]

[0332] from Fig.40 From the above, the MTF peak value of the central field of view of the optical lens of Example 20 at the spatial frequency of 60 lp / mm (60 line pairs / mm) exceeds 0.85. Therefore, the optical lens of Example 20 has good imaging quality.

[0333] Embodiment 21

[0334] The following reference Fig.41 The optical lens according to Example 21 of the present application is described. Fig.41 As shown, compared with Example 1, the main differences of this embodiment are: the optical parameters such as the curvature radius of each lens surface and the lens thickness are different; the first side surface S1 of the first lens L1 is a concave surface; the second side surface S10 of the fifth lens and the second side surface S12 of the sixth lens L6 have at least one inflection point.

[0335] Table 41 shows the basic parameter table of the optical lens of Example 21.

[0336] Table 41

[0337]

[0338] In Example 21, the first side surface S3 and the second side surface S4 of the second lens L2, the first side surface S8 of the fourth lens L4 to the second side surface S12 of the sixth lens L6 are all aspherical surfaces. Table 42 shows the cone coefficients and the high-order coefficients A4, A6, A8, A10, A12, A14 and A16 of the aspherical surfaces S3, S4, S8, S9, S10, S11 and S12 that can be used in Example 21.

[0339] Table 42

[0340]

[0341] from Fig.42 From the above, the MTF peak value of the central field of view of the optical lens of Example 21 at the spatial frequency of 60 lp / mm (60 line pairs / mm) exceeds 0.85. Therefore, the optical lens of Example 21 has good imaging quality.

[0342] Embodiment 22

[0343] The following reference Fig.43 The optical lens according to embodiment 22 of the present application is described. Fig.43 As shown, compared with Example 1, the main differences of this embodiment are: the optical parameters such as the curvature radius of each lens surface and the lens thickness are different; the first side surface S1 of the first lens L1 is a concave surface; the second side surface S10 of the fifth lens and the second side surface S12 of the sixth lens L6 have at least one inflection point.

[0344] Table 43 shows the basic parameter table of the optical lens of Example 22.

[0345] Table 43

[0346]

[0347] In Example 22, the first side surface S3 and the second side surface S4 of the second lens L2, the first side surface S8 of the fourth lens L4 to the second side surface S12 of the sixth lens L6 are all aspherical surfaces. Table 44 shows the cone coefficients and the high-order coefficients A4, A6, A8, A10, A12, A14 and A16 of the aspherical surfaces S3, S4, S8, S9, S10, S11 and S12 that can be used in Example 22.

[0348] Table 44

[0349]

[0350] from Fig.44From the above, the MTF peak value of the central field of view of the optical lens of Example 22 at the spatial frequency of 60 lp / mm (60 line pairs / mm) exceeds 0.85. Therefore, the optical lens of Example 22 has good imaging quality.

[0351] Tables 45-1 and 45-2 give the basic parameters of the optical lenses in Examples 1-22, such as F, TTL, FOV, ENPD, θ, H, BFL, F1, F2, F3, F4, F5, F6, D, D2, D11, D12, SAG11 and F45.

[0352] Table 45-1

[0353]

[0354] Table 45-2

[0355]

[0356] In summary, the conditional expressions of each embodiment in Embodiments 1 to 22 satisfy the relationship shown in Table 46-1 and Table 46-2.

[0357] Table 46-1

[0358]

[0359] Table 46-2

[0360]

[0361] The present application also provides an electronic device, which includes the optical lens in the above exemplary embodiment and an imaging element for converting an optical image formed by the optical lens into an electrical signal, wherein the imaging element is arranged on the second side of the optical lens, for example, on the imaging surface, and may be, for example, a photosensitive coupling device (CCD) or a complementary metal oxide semiconductor device (CMOS). Light from the first side passes through the optical lens and forms an image on the second side.

[0362] The present application also provides an electronic device, which includes the optical lens and a light source in the above exemplary embodiment, wherein the light source is located on the second side of the optical lens. The light emitted by the light source is projected onto the first side of the optical lens after passing through the optical lens, and forms an image or illuminates an area on the first side.

[0363] The present application also provides an electronic device, which includes a first device and a second device, the first device may be, for example, a laser radar transmitting device, and the second device may be, for example, a laser radar receiving device. The first device may include the optical lens and the light source in the above exemplary embodiment, the light source is located on the second side of the optical lens, the light emitted by the light source is projected to the first side of the optical lens after passing through the optical lens, and forms an image or illuminates the area on the first side. The second device may include the optical lens in the above exemplary embodiment and an imaging element for converting the optical image formed by the optical lens into an electrical signal, the imaging element is disposed on the second side of the optical lens (for example, disposed on the imaging surface), the imaging element may be, for example, a photosensitive coupling device (CCD) or a complementary metal oxide semiconductor element (CMOS), and the light from the first side is imaged on the second side after passing through the optical lens.

[0364] The above description is only a preferred embodiment of the present application and an explanation of the technical principles used. Those skilled in the art should understand that the scope of the invention involved in the present application is not limited to the technical solution formed by a specific combination of the above technical features, but should also cover other technical solutions formed by any combination of the above technical features or their equivalent features without departing from the inventive concept. For example, the above features are replaced with (but not limited to) technical features with similar functions disclosed in the present application.

Claims

1. An optical lens, characterized in that: The method comprises, in order from the first side to the second side along the optical axis: A first lens having negative optical power, wherein the second side surface of the first lens is concave; a second lens having optical power, wherein the first side surface is concave and the second side surface is convex; a third lens element having positive power, wherein the first side surface of the third lens element is convex; a fourth lens having optical power; a fifth lens having optical power; a sixth lens having optical power, wherein the second side surface of the sixth lens is concave; Wherein, the fourth lens and the fifth lens are glued together to form a glued lens; The fourth lens and the fifth lens have opposite signs of optical power. The number of lenses having optical power in the optical lens is six; The optical lens meets the following requirements: 1.5≤TTL / F≤2.8, 0.25≤F3 / F≤1.7, d56 / TTL≤0.025, 0.225≤(d8+d9) / TTL≤0.4, |R5 / R6|≤2, 0.08 mm -1 ≤D / H / F≤0.15 mm -1 ; Wherein, TTL is the total optical length of the optical lens, F is the total effective focal length of the optical lens, F3 is the effective focal length of the third lens, d56 is the on-axis distance from the second side surface of the fifth lens to the first side surface of the sixth lens, d8 is the center thickness of the fourth lens on the optical axis, d9 is the center thickness of the fifth lens on the optical axis, R5 is the curvature radius of the first side surface of the third lens, R6 is the curvature radius of the second side surface of the third lens, D is the maximum light clearance aperture of the first side surface of the first lens corresponding to the maximum field angle of the optical lens, and H is the image height corresponding to the maximum field angle of the optical lens.

2. The optical lens according to claim 1, characterized in that: The second lens has positive or negative refractive power.

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

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

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

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

7. The optical lens according to any one of claims 1 to 6, characterized in that: A radius of curvature R3 of the first side surface of the second lens, a total effective focal length F of the optical lens, and a radius of curvature R4 of the second side surface of the second lens satisfy: 1.0≤|F / R3|+|F / R4|≤3.

0.

8. The optical lens according to any one of claims 1 to 6, characterized in that: A curvature radius R3 of the first side surface of the second lens and a curvature radius R4 of the second side surface of the second lens satisfy: 0.5≤R3 / R4≤15.

9. The optical lens according to any one of claims 1 to 6, characterized in that: The combined focal length F45 of the fourth lens and the fifth lens and the total effective focal length F of the optical lens satisfy the following: 0.5≤F45 / F≤7.

10. The optical lens according to any one of claims 1 to 6, characterized in that: The image height H corresponding to the maximum field angle of the optical lens, the total effective focal length F of the optical lens and the arc value θ of the maximum field angle of the optical lens satisfy: |(HF×θ) / (F×θ)|≤0.

15.

11. The optical lens according to any one of claims 1 to 6, characterized in that: The curvature radius R5 of the first side surface of the third lens and the total effective focal length F of the optical lens satisfy: 0.5≤R5 / F≤1.

8.

12. The optical lens according to any one of claims 1 to 6, characterized in that: The effective focal length F4 of the fourth lens and the effective focal length F5 of the fifth lens satisfy: 0.45≤|F4 / F5|≤3.

5.

13. The optical lens according to any one of claims 1 to 6, characterized in that: The effective focal length F1 of the first lens and the total effective focal length F of the optical lens satisfy: -3.5≤F1 / F≤-1.

1.

14. The optical lens according to any one of claims 1 to 6, characterized in that: The vector height SAG11 of the first side surface of the sixth lens and the maximum clear aperture D11 of the first side surface of the sixth lens corresponding to the maximum field angle of the optical lens satisfy the following: |SAG11 / D11|≤0.

15.

15. The optical lens according to any one of claims 1 to 6, characterized in that: The maximum light clearance diameter D12 of the second side surface of the sixth lens corresponding to the maximum field angle of the optical lens and the image height H corresponding to the maximum field angle of the optical lens satisfy the following conditions: 0.5≤D12 / H≤1.

2.

16. The optical lens according to any one of claims 1 to 6, characterized in that: The effective focal length F6 of the sixth lens and the total effective focal length F of the optical lens satisfy the following: 0.75≤|F6 / F|.

17. The optical lens according to any one of claims 1 to 6, characterized in that: The center thickness d6 of the third lens on the optical axis and the total optical length TTL of the optical lens satisfy the following: 0.15≤d6 / TTL≤0.

24.

18. The optical lens according to any one of claims 1 to 6, characterized in that: The total effective focal length F of the optical lens and the image height H corresponding to the maximum field angle of the optical lens satisfy the following: 0.65≤F / H≤0.

8.

19. The optical lens according to any one of claims 1 to 6, characterized in that: An axial distance d34 from the second side surface of the third lens to the first side surface of the fourth lens and a total optical length TTL of the optical lens satisfy the following conditions: d34 / TTL≤0.

05.

20. The optical lens according to any one of claims 1 to 6, characterized in that: A curvature radius R5 of the first side surface of the third lens and a center thickness d6 of the third lens on the optical axis satisfy: 1.25≤R5 / d6≤3.

5.

21. The optical lens according to any one of claims 1 to 6, characterized in that: The optical lens satisfies at least one of the following conditions: 0.045≤ΣT / TTL≤0.185; 2.8≤|R1 / F|≤25; 0.15≤BFL / TTL≤0.28; 0.8≤R2 / D2≤3.6; TTL / H / FOV×1°≤0.028; 1.85≤F / ENPD≤2.4; |R6 / TTL|≤60; -6.5≤R3 / TTL≤-0.25; 1.45≤|F2 / F|; Wherein, ΣT is the sum of the air intervals between any two adjacent lenses from the first lens to the sixth lens on the optical axis, TTL is the total optical length of the optical lens, R3 is the radius of curvature of the first side surface of the second lens, R1 is the radius of curvature of the first side surface of the first lens, F is the total effective focal length of the optical lens, BFL is the back focal length of the optical lens, H is the image height corresponding to the maximum field of view of the optical lens, R2 is the radius of curvature of the second side surface of the first lens, D2 is the maximum clear aperture of the second side surface of the first lens corresponding to the maximum field of view of the optical lens, FOV is the maximum field of view of the optical lens, ENPD is the entrance pupil diameter of the optical lens, R6 is the radius of curvature of the second side surface of the third lens, and F2 is the effective focal length of the second lens.

22. The optical lens according to any one of claims 1 to 6, characterized in that: The optical lens satisfies at least one of the following conditions: 1.7≤TTL / F≤2.65;0.45≤F3 / F≤1.5;1.65≤|F2 / F|≤60;1.2≤|F / R3|+|F / R4|≤2.9;-3.2≤F1 / F≤-1.25;3≤|R1 / F|≤20;0.002≤d56 / TTL≤0.022;0.185≤BFL / TTL≤0.25;0.095 mm -1 ≤D / H / F≤0.125 mm -1 ;1≤R2 / D2≤3.2;0.6≤|F4 / F5|≤2.8;0.65≤F45 / F≤6;0.060≤ΣT / TTL≤0.160;0.7≤D12 / H≤1.0;0.008≤|(H-F×θ) / (F×θ)|≤0.125;|SAG11 / D11|≤0.12;0.65≤R3 / R4≤12;0.6≤R5 / F≤1.6;0.250≤(d8+d9) / TTL≤0.350;0.85≤|F6 / F|≤85;0.165≤d6 / TTL≤0.22;|R5 / R6|≤1.8;0.69≤F / H≤0.77;0.018≤TTL / H / FOV×1°≤0.025;2≤F / ENPD≤2.25;d34 / TTL≤0.04;1.5≤R5 / d6≤3.2;0.2≤|R6 / TTL|≤55;-5≤R3 / TTL≤-0.4; Wherein, TTL is the total optical length of the optical lens, F is the total effective focal length of the optical lens, F3 is the effective focal length of the third lens, F2 is the effective focal length of the second lens, R3 is the curvature radius of the first side surface of the second lens, R4 is the curvature radius of the second side surface of the second lens, F1 is the effective focal length of the first lens, R1 is the curvature radius of the first side surface of the first lens, d56 is the axial distance from the second side surface of the fifth lens to the first side surface of the sixth lens, BFL is the back focal length of the optical lens, D is the maximum clear aperture of the first side surface of the first lens corresponding to the maximum field of view of the optical lens, H is the image height corresponding to the maximum field of view of the optical lens, R2 is the curvature radius of the second side surface of the first lens, D2 is the maximum clear aperture of the second side surface of the first lens corresponding to the maximum field of view of the optical lens, F4 is the effective focal length of the fourth lens, F5 is the effective focal length of the fifth lens, and F45 is the distance between the fourth lens and the fifth lens. , ΣT is the sum of the air intervals between any two adjacent lenses from the first lens to the sixth lens on the optical axis, D12 is the maximum effective aperture of the second side of the sixth lens corresponding to the maximum field of view of the optical lens, θ is the radian value of the maximum field of view of the optical lens, SAG11 is the vector height of the first side of the sixth lens, D11 is the maximum effective aperture of the first side of the sixth lens corresponding to the maximum field of view of the optical lens, R5 is the radius of curvature of the first side of the third lens, d8 is the center thickness of the fourth lens on the optical axis, d9 is the center thickness of the fifth lens on the optical axis, F6 is the effective focal length of the sixth lens, d6 is the center thickness of the third lens on the optical axis, R6 is the radius of curvature of the second side of the third lens, FOV is the maximum field of view of the optical lens, ENPD is the entrance pupil diameter of the optical lens, and d34 is the axial distance from the second side of the third lens to the first side of the fourth lens.

23. The optical lens according to any one of claims 1 to 6, characterized in that: The optical lens satisfies at least one of the following conditions: 2.206≤TTL / F≤2.500; 0.623≤F3 / F≤1.460; 1.738≤|F2 / F|≤37.423; 1.286≤|F / R3|+|F / R4|≤2.827 ;-3.000≤F1 / F≤-1.356; 3.343≤|R1 / F|≤18.077; 0.008≤d56 / TTL≤0.020; 0.200≤BFL / TTL≤0.238; 0.104 mm -1 ≤D / H / F≤0.119 mm -1 ;1.425≤R2 / D2≤2.782;0.627≤|F4 / F5|≤1.591;0.896≤F45 / F≤4.157;0.081≤ΣT / TTL≤0.141;0.749≤D12 / H≤0.976;0.010≤|(H-F×θ) / (F×θ)|≤0.086;0.003≤|SAG11 / D11|≤0.086;0.763≤R3 / R4≤10.305;0.772≤R5 / F≤1.382;0.268≤(d8+d9) / TTL≤0.336;0.903≤|F6 / F|≤82.425;0.175≤d6 / TTL≤0.200;0.007≤|R5 / R6|≤1.389; 0.694≤F / H≤0.746; 0.020≤TTL / H / FOV×1°≤0.023; 2.200≤F / ENPD≤2.240; 0.008≤d34 / TTL≤0.034; 1.834≤R5 / d6≤2.914; 0.418≤|R6 / TTL|≤49.967; -3.977≤R3 / TTL≤-0.305; Wherein, TTL is the total optical length of the optical lens, F is the total effective focal length of the optical lens, F3 is the effective focal length of the third lens, F2 is the effective focal length of the second lens, R3 is the curvature radius of the first side surface of the second lens, R4 is the curvature radius of the second side surface of the second lens, F1 is the effective focal length of the first lens, R1 is the curvature radius of the first side surface of the first lens, d56 is the axial distance from the second side surface of the fifth lens to the first side surface of the sixth lens, BFL is the back focal length of the optical lens, D is the maximum clear aperture of the first side surface of the first lens corresponding to the maximum field of view of the optical lens, H is the image height corresponding to the maximum field of view of the optical lens, R2 is the curvature radius of the second side surface of the first lens, D2 is the maximum clear aperture of the second side surface of the first lens corresponding to the maximum field of view of the optical lens, F4 is the effective focal length of the fourth lens, F5 is the effective focal length of the fifth lens, and F45 is the distance between the fourth lens and the fifth lens. , ΣT is the sum of the air intervals between any two adjacent lenses from the first lens to the sixth lens on the optical axis, D12 is the maximum effective aperture of the second side of the sixth lens corresponding to the maximum field of view of the optical lens, θ is the radian value of the maximum field of view of the optical lens, SAG11 is the vector height of the first side of the sixth lens, D11 is the maximum effective aperture of the first side of the sixth lens corresponding to the maximum field of view of the optical lens, R5 is the radius of curvature of the first side of the third lens, d8 is the center thickness of the fourth lens on the optical axis, d9 is the center thickness of the fifth lens on the optical axis, F6 is the effective focal length of the sixth lens, d6 is the center thickness of the third lens on the optical axis, R6 is the radius of curvature of the second side of the third lens, FOV is the maximum field of view of the optical lens, ENPD is the entrance pupil diameter of the optical lens, and d34 is the axial distance from the second side of the third lens to the first side of the fourth lens.

24. An electronic device, characterized in that: include: The optical lens according to any one of claims 1 to 23; as well as at least one of an imaging element and a light source; Wherein, the imaging element is used to convert the optical image or optical information formed by the optical lens into an electrical signal; The light source is located on the second side of the optical lens, and the light emitted by the light source is projected to the first side of the optical lens after passing through the optical lens, and forms an image or illuminates an area on the first side of the optical lens.

Images