Optical lens and electronic device

Abstract

This application discloses an optical lens and an electronic device including the optical lens. The optical lens includes, sequentially from a first side to a second side along the optical axis: a first lens with negative optical power, wherein the first side is convex and the second side is concave; a second lens with negative optical power, wherein the first side is convex and the second side is concave; a third lens with positive optical power, wherein the first side is concave and the second side is convex; a fourth lens with positive optical power, wherein the first side is convex; a fifth lens with positive optical power, wherein the first side is concave and the second side is convex; and a sixth lens with positive optical power, wherein the first side is convex.

Description

Technical Field

[0001] This application relates to the field of optical components, and more specifically, to an optical lens and electronic device. Background Technology

[0002] With the continuous development of optical lens technology, the applications of optical lenses are becoming increasingly widespread. For example, optical lenses play an irreplaceable role in many fields such as smartphones, security monitoring, automotive driver assistance systems, intelligent detection, and virtual reality. At the same time, lens manufacturers in various fields are actively investing in and committed to researching and improving the performance and technology of optical lenses in order to enhance the quality and competitiveness of their products.

[0003] The rapid development of automotive driver assistance systems in recent years has led to the increasingly widespread application of lenses in automobiles, making the requirements for low distortion and low field of view (FNO) of lenses increasingly prominent. For lenses used in specific applications, a low FNO is typically required to increase light intake; to improve image quality, the number of lens elements is usually increased. However, this increase in the number of lens elements increases the lens size and weight, hindering miniaturization and raising costs. Furthermore, some lenses used in specific applications are affected by harsh environments, resulting in degraded image quality, thus requiring stable imaging over a wide temperature range. Simultaneously, some lenses need low distortion to support backend algorithms and improve application accuracy.

[0004] Therefore, the market currently needs an optical lens with low distortion, low FNO, and features such as miniaturization, low cost, good temperature performance, and good image quality to meet the lens requirements of the ever-evolving automotive driver assistance systems. Summary of the Invention

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

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

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

[0008] In one embodiment, the second side surface of the sixth lens is a convex surface.

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

[0010] In one embodiment, the second lens has an aspherical mirror surface.

[0011] In one embodiment, the sixth lens has an aspherical mirror surface.

[0012] In one embodiment, the optical lens further includes an aperture stop disposed between the second lens and the third lens.

[0013] In one embodiment, the total effective focal length F of the optical lens and the entrance pupil diameter EPD of the optical lens can satisfy: F / EPD≤1.5.

[0014] In one embodiment, the distance TTL from the center of the first side of the first lens to the imaging surface of the optical lens on the optical axis and the total effective focal length F of the optical lens can satisfy: TTL / F≤12.

[0015] In one embodiment, the distance TTL from the center of the first side of the first lens to the imaging surface of the optical lens on the optical axis, the maximum field of view (FOV) of the optical lens, and the image height H corresponding to the maximum field of view of the optical lens can satisfy: TTL / H / FOV≤0.08.

[0016] In one embodiment, the distance TTL from the center of the first side of the first lens to the imaging surface of the optical lens on the optical axis, the image height H corresponding to the maximum field of view of the optical lens, and the radian value θ corresponding to the maximum field of view of the optical lens can satisfy: TTL / H / θ≤5.

[0017] In one embodiment, the distance BFL from the center of the second side of the sixth lens to the imaging surface of the optical lens on the optical axis and the distance TTL from the center of the first side of the first lens to the imaging surface of the optical lens on the optical axis can satisfy: BFL / TTL≥0.08.

[0018] In one embodiment, the maximum field of view (FOV) of the optical lens, the maximum aperture D of the first side of the first lens corresponding to the maximum field of view of the optical lens, and the image height H corresponding to the maximum field of view of the optical lens can satisfy: D / H / FOV≤0.05.

[0019] In one embodiment, the maximum field of view (FOV) of the optical lens, the total effective focal length (F) of the optical lens, and the image height (H) corresponding to the maximum field of view of the optical lens can satisfy: (FOV×F) / H≤60.

[0020] In one embodiment, the sag SAG4 at the maximum aperture of the second side of the second lens and the sag SAG3 at the maximum aperture of the first side of the second lens can satisfy: 0.5≤SAG4 / SAG3≤1.6.

[0021] In one embodiment, the radius of curvature R1 of the first side surface of the first lens and the radius of curvature R2 of the second side surface of the first lens can satisfy: R1 / R2≥1.6.

[0022] In one embodiment, the radius of curvature R6 of the first side surface of the third lens and the radius of curvature R7 of the second side surface of the third lens can satisfy: R6 / R7≥1.6.

[0023] In one embodiment, the total effective focal length F of the optical lens, the maximum field of view (FOV) of the optical lens, and the image height H corresponding to the maximum field of view of the optical lens can satisfy: 1.1≥|F×tan(FOV / 2) / (H / 2)|≥0.9.

[0024] In one embodiment, the effective focal length F5 of the fifth lens and the total effective focal length F of the optical lens can satisfy: F5 / F≥1.8.

[0025] In one embodiment, the effective focal length F6 of the sixth lens and the total effective focal length F of the optical lens can satisfy: F6 / F≥1.8.

[0026] In one embodiment, the maximum aperture D of the first side of the first lens corresponding to the maximum field of view of the optical lens, the image height H corresponding to the maximum field of view of the optical lens, and the total effective focal length F of the optical lens can satisfy: D / H / F≤1.3.

[0027] In one embodiment, the effective focal length F1 of the first lens and the effective focal length F2 of the second lens can satisfy: 1.7≥F1 / F2≥0.5.

[0028] In one embodiment, the combined focal length F23 of the second lens and the third lens and the total effective focal length F of the optical lens can satisfy: F23 / F≥1.8.

[0029] In one embodiment, the maximum aperture D of the first side of the first lens corresponding to the maximum field of view of the optical lens, the image height H corresponding to the maximum field of view of the optical lens, and the radian value θ corresponding to the maximum field of view of the optical lens can satisfy: D / H / θ≤1.8.

[0030] In one embodiment, the total effective focal length F of the optical lens, the radian value θ corresponding to the maximum field of view of the optical lens, and the maximum aperture D of the first side of the first lens corresponding to the maximum field of view of the optical lens can satisfy: F×θ / D≥0.2.

[0031] In one embodiment, the effective focal length F2 of the second lens and the effective focal length F3 of the third lens can satisfy: -1.5≤F2 / F3≤-0.5.

[0032] In one embodiment, the effective focal length F4 of the fourth lens and the total effective focal length F of the optical lens can satisfy: F4 / F≥1.8.

[0033] This application also provides an optical lens, which comprises, from a first side to a second side along the optical axis: a first lens with negative optical power; a second lens with negative optical power; a third lens with positive optical power; a fourth lens with positive optical power; a fifth lens with positive optical power; and a sixth lens with positive optical power. The total effective focal length F of the optical lens and the entrance pupil diameter EPD of the optical lens can satisfy: F / EPD ≤ 1.5.

[0034] In one embodiment, the first side surface of the first lens is convex, and the second side surface is concave.

[0035] In one embodiment, the first side surface of the second lens is convex, and the second side surface is concave.

[0036] In one embodiment, the first side surface of the third lens is concave, and the second side surface is convex.

[0037] In one embodiment, the first side surface of the fourth lens is convex, and the second side surface is convex.

[0038] In one embodiment, the first side surface of the fourth lens is convex, and the second side surface is concave.

[0039] In one embodiment, the first side surface of the fifth lens is concave, and the second side surface is convex.

[0040] In one embodiment, the first side surface of the sixth lens is convex, and the second side surface is convex.

[0041] In one embodiment, the first side surface of the sixth lens is convex, and the second side surface is concave.

[0042] In one embodiment, the second lens has an aspherical mirror surface.

[0043] In one embodiment, the sixth lens has an aspherical mirror surface.

[0044] In one embodiment, the optical lens further includes an aperture stop disposed between the second lens and the third lens.

[0045] In one embodiment, the distance TTL from the center of the first side of the first lens to the imaging surface of the optical lens on the optical axis and the total effective focal length F of the optical lens can satisfy: TTL / F≤12.

[0046] In one embodiment, the distance TTL from the center of the first side of the first lens to the imaging surface of the optical lens on the optical axis, the maximum field of view (FOV) of the optical lens, and the image height H corresponding to the maximum field of view of the optical lens can satisfy: TTL / H / FOV≤0.08.

[0047] In one embodiment, the distance TTL from the center of the first side of the first lens to the imaging surface of the optical lens on the optical axis, the image height H corresponding to the maximum field of view of the optical lens, and the radian value θ corresponding to the maximum field of view of the optical lens can satisfy: TTL / H / θ≤5.

[0048] In one embodiment, the distance BFL from the center of the second side of the sixth lens to the imaging surface of the optical lens on the optical axis and the distance TTL from the center of the first side of the first lens to the imaging surface of the optical lens on the optical axis can satisfy: BFL / TTL≥0.08.

[0049] In one embodiment, the maximum field of view (FOV) of the optical lens, the maximum aperture D of the first side of the first lens corresponding to the maximum field of view of the optical lens, and the image height H corresponding to the maximum field of view of the optical lens can satisfy: D / H / FOV≤0.05.

[0050] In one embodiment, the maximum field of view (FOV) of the optical lens, the total effective focal length (F) of the optical lens, and the image height (H) corresponding to the maximum field of view of the optical lens can satisfy: (FOV×F) / H≤60.

[0051] In one embodiment, the sag SAG4 at the maximum aperture of the second side of the second lens and the sag SAG3 at the maximum aperture of the first side of the second lens can satisfy: 0.5≤SAG4 / SAG3≤1.6.

[0052] In one embodiment, the radius of curvature R1 of the first side surface of the first lens and the radius of curvature R2 of the second side surface of the first lens can satisfy: R1 / R2≥1.6.

[0053] In one embodiment, the radius of curvature R6 of the first side surface of the third lens and the radius of curvature R7 of the second side surface of the third lens can satisfy: R6 / R7≥1.6.

[0054] In one embodiment, the total effective focal length F of the optical lens, the maximum field of view (FOV) of the optical lens, and the image height H corresponding to the maximum field of view of the optical lens can satisfy: 1.1≥|F×tan(FOV / 2) / (H / 2)|≥0.9.

[0055] In one embodiment, the effective focal length F5 of the fifth lens and the total effective focal length F of the optical lens can satisfy: F5 / F≥1.8.

[0056] In one embodiment, the effective focal length F6 of the sixth lens and the total effective focal length F of the optical lens can satisfy: F6 / F≥1.8.

[0057] In one embodiment, the maximum aperture D of the first side of the first lens corresponding to the maximum field of view of the optical lens, the image height H corresponding to the maximum field of view of the optical lens, and the total effective focal length F of the optical lens can satisfy: D / H / F≤1.3.

[0058] In one embodiment, the effective focal length F1 of the first lens and the effective focal length F2 of the second lens can satisfy: 1.7≥F1 / F2≥0.5.

[0059] In one embodiment, the combined focal length F23 of the second lens and the third lens and the total effective focal length F of the optical lens can satisfy: F23 / F≥1.8.

[0060] In one embodiment, the maximum aperture D of the first side of the first lens corresponding to the maximum field of view of the optical lens, the image height H corresponding to the maximum field of view of the optical lens, and the radian value θ corresponding to the maximum field of view of the optical lens can satisfy: D / H / θ≤1.8.

[0061] In one embodiment, the total effective focal length F of the optical lens, the radian value θ corresponding to the maximum field of view of the optical lens, and the maximum aperture D of the first side of the first lens corresponding to the maximum field of view of the optical lens can satisfy: F×θ / D≥0.2.

[0062] In one embodiment, the effective focal length F2 of the second lens and the effective focal length F3 of the third lens can satisfy: -1.5≤F2 / F3≤-0.5.

[0063] In one embodiment, the effective focal length F4 of the fourth lens and the total effective focal length F of the optical lens can satisfy: F4 / F≥1.8.

[0064] This application also provides an electronic device. The electronic device includes an optical lens according to this application and an imaging element for converting an optical image formed by the optical lens into an electrical signal.

[0065] This application employs six lenses. By optimizing the shape and optical power of each lens, the optical lens achieves at least one beneficial effect, such as low distortion, low FNO, low cost, miniaturization, good temperature performance, and good image quality, thus enabling the optical lens to better meet the requirements of automotive lenses. Attached Figure Description

[0066] Other features, objects, and advantages of this application will become more apparent from the following detailed description of the embodiments, taken in conjunction with the accompanying drawings. In the drawings:

[0067] Figure 1 This is a schematic diagram illustrating the structure of an optical lens according to Embodiment 1 of this application;

[0068] Figure 2 To illustrate the structure of the optical lens according to Embodiment 2 of this application;

[0069] Figure 3 To illustrate the structure of the optical lens according to Embodiment 3 of this application;

[0070] Figure 4 This is a schematic diagram illustrating the structure of the optical lens according to Embodiment 4 of this application;

[0071] Figure 5 To illustrate the structure of the optical lens according to Embodiment 5 of this application;

[0072] Figure 6 To illustrate the structure of the optical lens according to Embodiment 6 of this application;

[0073] Figure 7 To illustrate the structural schematic diagram of the optical lens according to Embodiment 7 of this application; and

[0074] Figure 8 This is a schematic diagram illustrating the structure of an optical lens according to Embodiment 8 of this application. Detailed Implementation

[0075] To facilitate understanding of this application, a more complete description of the application will be provided below with reference to the accompanying drawings. It should be understood that these detailed descriptions are merely illustrative of exemplary embodiments of the application and are not intended to limit the scope of the application in any way. Throughout the specification, the same reference numerals refer to the same elements. The expression "and / or" includes any and all combinations of one or more of the associated listed items.

[0076] It should be noted that in this specification, the terms "first," "second," "third," etc., are used only to distinguish one feature from another and do not imply any limitation on the features. Therefore, without departing from the teachings of this application, the first lens discussed below may also be referred to as the second lens or the third lens.

[0077] In the accompanying 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 illustrated by way of example. That is, the shapes of the spherical or aspherical surfaces are not limited to those shown in the drawings. The drawings are for illustrative purposes only and are not strictly to scale.

[0078] In this article, the paraxial region refers to the region near the optical axis. If the lens surface is convex and the location of the convexity 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 location of the concaveness 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 subject is called the object-side surface of the lens, and the surface of each lens closest to the imaging side is called the image-side surface of the lens.

[0079] It should be understood that the optical lens provided in this application can be used for both photography and projection. When the optical lens provided in this application is used as a camera lens, the term "first side" as used herein may refer to the object side, and "second side" may refer to the image side; when the optical lens provided in this application is used as a projection lens or a radar transmitting lens, the term "first side" as used herein may refer to the imaging side, and "second side" may refer to the image source side.

[0080] It should also be understood that the terms "comprising," "including," "having," "containing," and / or "comprising," when used in this specification, indicate the presence of the stated features, elements, and / or components, but do not exclude the presence or addition of one or more other features, elements, components, and / or combinations thereof. Furthermore, when expressions such as "at least one of..." appear after a list of listed features, they modify the entire list of features, not individual elements in the list. Additionally, when describing embodiments of this application, the word "may" is used to mean "one or more embodiments of this application." And the term "exemplary" is intended to refer to an example or illustration.

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

[0082] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other. This application will now be described in detail with reference to the accompanying drawings and embodiments.

[0083] The features, principles and other aspects of this application are described in detail below.

[0084] In an exemplary embodiment, the optical lens includes, for example, six lenses with optical power, namely a first lens, a second lens, a third lens, a fourth lens, a fifth lens, and a sixth lens. These six lenses are arranged sequentially along the optical axis from the first side to the second side.

[0085] In an exemplary embodiment, the optical lens may further include a photosensitive element disposed on the imaging surface. Optionally, the photosensitive element disposed on the imaging surface may be a photocoupled device (CCD) or a complementary metal oxide semiconductor device (CMOS).

[0086] In an exemplary embodiment, the first lens may have a negative optical power. The first lens may have a convex-concave surface. The negative optical power of the first lens helps to collect more light into the rear optical system, increasing the light flux. Simultaneously, the large focal length of the first lens facilitates a smoother transition of light to the rear, achieving a small FNO while improving resolution quality.

[0087] In an exemplary embodiment, the second lens may have a negative optical power. The second lens may have a convex-concave surface. The negative optical power of the second lens further collects light, ensuring a smooth transition in light path, while allowing large-angle light to enter the system as much as possible, thus improving illumination. Preferably, the second lens may have an aspherical mirror surface, which is beneficial for correcting field curvature, compressing distortion, and improving resolution.

[0088] In an exemplary embodiment, the third lens may have positive optical power. The third lens may have a concave-convex surface. The fact that the third lens is a positive optical power lens is beneficial for adjusting the angle of light, compressing peripheral light, and reducing the lens aperture.

[0089] In an exemplary embodiment, the fourth lens may have positive optical power. The fourth lens may have a convex-convex or convex-concave surface. Setting the fourth lens as a positive optical power lens with a convex-convex surface is beneficial for compressing the light collected at the front end and reducing the aperture of the rear lens, while effectively reducing system CRA, making it more suitable for use in low-light environments. Setting the fourth lens as a positive optical power lens with a convex-concave surface is beneficial for compressing the light collected at the front end and smoothing the light transition to the rear, reducing system sensitivity, improving image quality, while effectively reducing system CRA, making it more suitable for use in low-light environments.

[0090] In an exemplary embodiment, the fifth lens may have positive optical power. The fifth lens may have a concave-convex surface. The fifth lens may be a telephoto lens, which is beneficial for collecting light and ensuring a smooth transition of light rays to the rear, thereby improving illumination and resolution.

[0091] In an exemplary embodiment, the sixth lens may have positive optical power. The sixth lens may have a convex-convex or convex-concave surface. The sixth lens may be a biconvex telephoto lens, which helps light converge to the image plane, achieving a small CRA (Current Radiation Amplitude) and improving illumination. Simultaneously, the convex surface of the image side helps reduce ghosting caused by image plane reflections. The sixth lens may also be a meniscus telephoto lens, which helps light converge smoothly to the image plane, achieving a small CRA and improving illumination while effectively reducing system sensitivity. Preferably, the sixth lens may have an aspherical mirror surface, which helps correct field curvature, compress distortion, and improve resolution.

[0092] In an exemplary embodiment, the optical lens may further include an aperture stop disposed between the second lens and the third lens. Disposing the aperture stop between the second and third lenses facilitates effective light convergence entering the optical system, and placing the aperture stop forward helps achieve a small FNO (no focal length). In embodiments of this application, the aperture stop may be disposed near the second side surface of the second lens, or near the first side surface of the third lens, or near the midpoint between the second and third lenses. However, it should be noted that the positions of the aperture stop disclosed herein are merely examples and not limitations; in alternative embodiments, the aperture stop may be disposed at other positions as needed.

[0093] In an exemplary embodiment, the optical lens according to this application can satisfy: F / EPD ≤ 1.5, where F is the total effective focal length of the optical lens and EPD is the entrance pupil diameter of the optical lens. More specifically, F and EPD can further satisfy: F / EPD ≤ 1.3. Satisfying F / EPD ≤ 1.5 is beneficial for realizing a small FNO lens and increasing the amount of light entering the lens.

[0094] In an exemplary embodiment, the optical lens according to this application satisfies the following condition: TTL / F ≤ 12, where TTL is the distance on the optical axis from the center of the first side of the first lens to the imaging plane of the optical lens, and F is the total effective focal length of the optical lens. More specifically, TTL and F can further satisfy: TTL / F ≤ 10. Satisfying TTL / F ≤ 12 can effectively limit the length of the lens and achieve lens miniaturization.

[0095] In an exemplary embodiment, the optical lens according to this application satisfies the following condition: TTL / H / FOV ≤ 0.08, where TTL is the distance along the optical axis from the center of the first side of the first lens to the imaging plane of the optical lens, FOV is the maximum field of view of the optical lens, and H is the image height corresponding to the maximum field of view of the optical lens. More specifically, TTL, H, and FOV can further satisfy: TTL / H / FOV ≤ 0.06. Satisfying TTL / H / FOV ≤ 0.08, under the same imaging plane and image height, can effectively limit the length of the lens, which is beneficial for achieving lens miniaturization.

[0096] In an exemplary embodiment, the optical lens according to this application satisfies: TTL / H / θ ≤ 5, where TTL is the distance on the optical axis from the center of the first side of the first lens to the imaging surface of the optical lens, H is the image height corresponding to the maximum field of view of the optical lens, and θ is the radian value corresponding to the maximum field of view of the optical lens. More specifically, TTL, H, and θ can further satisfy: TTL / H / θ ≤ 4. Satisfying TTL / H / θ ≤ 5, under the same imaging surface and image height, can effectively limit the length of the lens, which is beneficial for achieving lens miniaturization.

[0097] In an exemplary embodiment, the optical lens according to this application satisfies the following condition: BFL / TTL ≥ 0.08, where BFL is the distance on the optical axis from the center of the second side surface of the sixth lens to the imaging plane of the optical lens, and TTL is the distance on the optical axis from the center of the first side surface of the first lens to the imaging plane of the optical lens. More specifically, BFL and TTL can further satisfy: BFL / TTL ≥ 0.1. Satisfying BFL / TTL ≥ 0.08 allows for lens miniaturization while increasing the back focal length, which is beneficial for module assembly.

[0098] In an exemplary embodiment, the optical lens according to this application satisfies the following condition: D / H / FOV ≤ 0.05, where FOV is the maximum field of view of the optical lens, D is the maximum aperture of the first side of the first lens corresponding to the maximum field of view of the optical lens, and H is the image height corresponding to the maximum field of view of the optical lens. More specifically, D, H, and FOV can further satisfy: D / H / FOV ≤ 0.03. Satisfying D / H / FOV ≤ 0.05 is beneficial for a small front aperture of the lens, enabling miniaturization.

[0099] In an exemplary embodiment, the optical lens according to this application satisfies: (FOV×F) / H≤60, where FOV is the maximum field of view of the optical lens, F is the total effective focal length of the optical lens, and H is the image height corresponding to the maximum field of view of the optical lens. More specifically, FOV, F, and H can further satisfy: (FOV×F) / H≤50. Satisfying (FOV×F) / H≤60, while simultaneously satisfying the short focal length and small field of view, is beneficial for achieving low distortion.

[0100] In an exemplary embodiment, the optical lens according to this application satisfies: 0.5 ≤ SAG4 / SAG3 ≤ 1.6, where SAG4 is the sag at the maximum light-transmitting aperture of the second side of the second lens, and SAG3 is the sag at the maximum light-transmitting aperture of the first side of the second lens. More specifically, SAG4 and SAG3 further satisfy: 0.7 ≤ SAG4 / SAG3 ≤ 1.5. Satisfying 0.5 ≤ SAG4 / SAG3 ≤ 1.6 is beneficial for smooth light transition.

[0101] In an exemplary embodiment, the optical lens according to this application satisfies: R1 / R2 ≥ 1.6, where R1 is the radius of curvature of the first side surface of the first lens, and R2 is the radius of curvature of the second side surface of the first lens. More specifically, R1 and R2 may further satisfy: R1 / R2 ≥ 1.9. Satisfying R1 / R2 ≥ 1.6 facilitates rapid focusing of large-angle peripheral light rays entering through the first lens, thereby improving image quality.

[0102] In an exemplary embodiment, the optical lens according to this application satisfies the following: where R6 is the radius of curvature of the first side surface of the third lens, and R7 is the radius of curvature of the second side surface of the third lens. More specifically, R6 and R7 further satisfy: R6 / R7 ≥ 1.9. Satisfying R6 / R7 ≥ 1.6 is beneficial for the third lens to collect more light, increasing the light transmission capability of the system.

[0103] In an exemplary embodiment, the optical lens according to this application satisfies: 1.1 ≥ |F×tan(FOV / 2) / (H / 2)| ≥ 0.9, where F is the total effective focal length of the optical lens, FOV is the maximum field of view of the optical lens, and H is the image height corresponding to the maximum field of view of the optical lens. More specifically, F, FOV, and H further satisfy: 1.05 ≥ |F×tan(FOV / 2) / (H / 2)| ≥ 0.95. Satisfying 1.1 ≥ |F×tan(FOV / 2) / (H / 2)| ≥ 0.9 ensures that the ideal image height is close to the actual image height, which is beneficial for achieving small lens distortion.

[0104] In an exemplary embodiment, the optical lens according to this application satisfies: F5 / F ≥ 1.8, where F5 is the effective focal length of the fifth lens and F is the total effective focal length of the optical lens. More specifically, F5 and F may further satisfy: F5 / F ≥ 2. Satisfying F5 / F ≥ 1.8, a telephoto lens, helps to smooth the light transition and reduce sensitivity.

[0105] In an exemplary embodiment, the optical lens according to this application satisfies: F6 / F ≥ 1.8, where F6 is the effective focal length of the sixth lens and F is the total effective focal length of the optical lens. More specifically, F6 and F may further satisfy: F6 / F ≥ 2. Satisfying F6 / F ≥ 1.8, a telephoto lens, helps to smooth the light transition and reduce sensitivity.

[0106] In an exemplary embodiment, the optical lens according to this application satisfies: D / H / F ≤ 1.3, where D is the maximum aperture of the first side of the first lens corresponding to the maximum field of view of the optical lens, H is the image height corresponding to the maximum field of view of the optical lens, and F is the total effective focal length of the optical lens. More specifically, D, H, and F can further satisfy D / H / F ≤ 1.1. Satisfying D / H / F ≤ 1.3, under the condition of a fixed focal length, can provide the lens with the characteristics of a large target surface and a small aperture.

[0107] In an exemplary embodiment, the optical lens according to this application satisfies: 1.7 ≥ F1 / F2 ≥ 0.5, where F1 is the effective focal length of the first lens and F2 is the effective focal length of the second lens. More specifically, F1 and F2 further satisfy: 1.5 ≥ F1 / F2 ≥ 0.7. Satisfying 1.7 ≥ F1 / F2 ≥ 0.5 helps to smooth the light transition and is beneficial to image quality improvement.

[0108] In an exemplary embodiment, the optical lens according to this application satisfies: F23 / F ≥ 1.8, where F23 is the combined focal length of the second and third lenses, and F is the total effective focal length of the optical lens. More specifically, F23 and F may further satisfy: F23 / F ≥ 2. Satisfying F23 / F ≥ 1.8 is beneficial for controlling the light path between the second and third lenses, contributing to a smoother light transition and reducing sensitivity.

[0109] In an exemplary embodiment, the optical lens according to this application satisfies: D / H / θ ≤ 1.8, where D is the maximum aperture of the first side of the first lens corresponding to the maximum field of view of the optical lens, H is the image height corresponding to the maximum field of view of the optical lens, and θ is the radian value corresponding to the maximum field of view of the optical lens. More specifically, D, H, and θ can further satisfy: D / H / θ ≤ 1.5. Satisfying D / H / θ ≤ 1.8 allows for a smaller front aperture of the lens, which is beneficial for miniaturization.

[0110] In an exemplary embodiment, the optical lens according to this application satisfies: F×θ / D≥0.2, where F is the total effective focal length of the optical lens, θ is the radian value corresponding to the maximum field of view of the optical lens, and D is the maximum aperture of the first side of the first lens corresponding to the maximum field of view of the optical lens. More specifically, F, θ, and D can further satisfy: F×θ / D≥0.3. Satisfying F×θ / D≥0.2 allows for a smaller front aperture of the lens, which is beneficial for lens miniaturization.

[0111] In an exemplary embodiment, the optical lens according to this application satisfies: -1.5 ≤ F2 / F3 ≤ -0.5, where F2 is the effective focal length of the second lens and F3 is the effective focal length of the third lens. More specifically, F2 and F3 may further satisfy: -1.3 ≤ F2 / F3 ≤ -0.6. Satisfying -1.5 ≤ F2 / F3 ≤ -0.5 helps to smooth the light transition and is beneficial to image quality improvement.

[0112] In an exemplary embodiment, the optical lens according to this application satisfies: F4 / F ≥ 1.8, where F4 is the effective focal length of the fourth lens and F is the total effective focal length of the optical lens. More specifically, F4 and F may further satisfy: F4 / F ≥ 2. Satisfying F4 / F ≥ 1.8, a telephoto lens, helps to smooth the light transition and reduce sensitivity.

[0113] In an exemplary embodiment, the optical lens of this application may, as needed, include a filter and / or protective glass disposed between the sixth lens and the imaging surface to filter light of different wavelengths and prevent damage to the second-side components (e.g., chips) of the optical lens.

[0114] In an exemplary embodiment, the first lens may be a spherical lens; the second lens may be an aspherical lens; the third, fourth, and fifth lenses may be spherical lenses; and the sixth lens may be an aspherical lens. This application does not specifically limit the number of spherical and aspherical lenses; the number of aspherical lenses can be increased when resolving quality is a primary concern. Specifically, to improve the resolving quality of the optical system, the first, second, third, fourth, fifth, and sixth lenses may all be aspherical lenses. Aspherical lenses are characterized by a continuously changing curvature from the lens center to the periphery. Unlike spherical lenses, which have a constant curvature from the lens center to the periphery, aspherical lenses have better curvature radius characteristics, offering advantages in improving distortion aberrations and astigmatism. Using aspherical lenses can eliminate aberrations that occur during imaging as much as possible, thereby improving the lens's imaging quality. The use of aspherical lenses helps correct system aberrations and improve resolving power.

[0115] In an exemplary embodiment, the first lens, second lens, third lens, fourth lens, fifth lens, and sixth lens can all be glass lenses. Optical lenses made of glass can suppress the shift in the back focus of the optical lens due to temperature changes, thereby improving system stability. Simultaneously, using glass avoids problems such as lens blurring caused by high and low temperature variations in the operating environment, and prevents interference with normal lens use. Specifically, when temperature performance and resolution quality are of paramount importance, the first to sixth lenses can all be aspherical glass lenses. In applications with lower temperature stability requirements, the first to sixth lenses in the optical lens can also be made of plastic. Using plastic to make optical lenses can effectively reduce manufacturing costs. Of course, the first to sixth lenses in the optical lens can also be made of a combination of plastic and glass.

[0116] The optical lens according to the above embodiments of this application achieves at least one beneficial effect such as small distortion, small FNO, low cost, miniaturization, long back focal length, good temperature performance and good imaging quality by reasonably setting the shape and power of each lens, so that the optical lens can better meet the requirements of automotive lenses.

[0117] However, those skilled in the art will understand that the number of lenses constituting the lens can be changed to obtain the various results and advantages described in this specification without departing from the technical solutions claimed in this application. For example, although six lenses are described as an example in the embodiments, the optical lens is not limited to including six lenses. If desired, the optical lens may also include other numbers of lenses. Specific embodiments of the optical lens applicable to the above embodiments are further described below with reference to the accompanying drawings.

[0118] Example 1

[0119] The following is for reference Figure 1 An optical lens according to Embodiment 1 of this application is described. Figure 1 A schematic diagram of the structure of an optical lens according to Embodiment 1 of this application is shown.

[0120] like Figure 1 As shown, the optical lens includes, in sequence from the first side to the second side, 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.

[0121] The first lens L1 is a convex-concave lens with negative optical power, its first side surface S1 is convex, and its second side surface S2 is concave. The second lens L2 is a convex-concave lens with negative optical power, its first side surface S3 is convex, and its second side surface S4 is concave. The third lens L3 is a concave-convex lens with positive optical power, its first side surface S6 is concave, and its second side surface S7 is convex. The fourth lens L4 is a convex-convex lens with positive optical power, its first side surface S8 is convex, and its second side surface S9 is convex. The fifth lens L5 is a concave-convex lens with positive optical power, its first side surface S10 is concave, and its second side surface S11 is convex. The sixth lens L6 is a convex-convex lens with positive optical power, its first side surface S12 is convex, and its second side surface S13 is convex.

[0122] The optical lens may also include an aperture stop STO, which can be positioned between the second lens L2 and the third lens L3 to effectively converge the light entering the optical system and facilitate a small f-number (FNO). For example, the aperture stop STO can be positioned between the second lens L2 and the third lens L3, near the first side surface S6 of the third lens L3.

[0123] When the optical lens is used for imaging, light from the object passes through each surface S1 to S13 in sequence and is finally imaged on the imaging surface; when the optical lens is used for projection, light from the image source surface passes through each surface S13 to S1 in sequence and is finally projected onto the target object (not shown).

[0124] Table 1 shows the radius of curvature R, thickness / distance d (it should be understood that the thickness / distance d in the row where S1 is located is the center thickness d1 of the first lens L1, the thickness / distance d in the row where S2 is located is the spacing distance d2 between the first lens L1 and the second lens L2, and so on), refractive index N, and Abbe number Vd of each lens of the optical lens of Embodiment 1.

[0125]

[0126]

[0127] Table 1

[0128] In Embodiment 1, the first side surface S3 and the second side surface S4 of the second lens L2 and the first side surface S12 and the second side surface S13 of the sixth lens L6 can all be aspherical surfaces. The surface shape x of each aspherical lens can be defined using, but is not limited to, the following aspherical formula:

[0129]

[0130] Where x is the distance vector from the vertex of the aspherical surface at a height h along the optical axis; c is the paraxial curvature of the aspherical surface, c = 1 / R (i.e., the paraxial curvature c is the reciprocal of the radius of curvature R in Table 1 above); k is the conic coefficient; Ai is the i-th order correction coefficient of the aspherical surface. Table 2 below gives the conic coefficient k and higher-order coefficients A4, A6, A8, A10, A12 and A14 that can be used for the aspherical mirrors S3, S4, S12 and S13 in Example 1.

[0131] Face number k A4 A6 A8 A10 A12 A14 S3 3.2588 8.9692E-03 -7.9532E-04 4.1638E-05 -5.0005E-07 -1.7780E-07 0 S4 -1.3298 1.9977E-02 -1.5385E-03 2.1383E-04 -5.0580E-05 2.4984E-06 0 S12 3.8607 -1.7721E-03 1.4486E-04 -2.3137E-05 1.7830E-06 -1.4443E-07 0 S13 3.9263 4.0728E-03 -5.0537E-05 1.0939E-05 -2.9121E-06 1.0035E-07 -7.69237E-09

[0132] Table 2

[0133] Example 2

[0134] The following is for reference Figure 2 An optical lens according to Embodiment 2 of this application is described. In this embodiment and the following embodiments, for the sake of brevity, descriptions similar to those in Embodiment 1 will be omitted. Figure 2 A schematic diagram of the structure of an optical lens according to Embodiment 2 of this application is shown.

[0135] like Figure 2 As shown, the optical lens includes, in sequence from the first side to the second side, 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.

[0136] The first lens L1 is a convex-concave lens with negative optical power, its first side surface S1 is convex, and its second side surface S2 is concave. The second lens L2 is a convex-concave lens with negative optical power, its first side surface S3 is convex, and its second side surface S4 is concave. The third lens L3 is a concave-convex lens with positive optical power, its first side surface S6 is concave, and its second side surface S7 is convex. The fourth lens L4 is a convex-convex lens with positive optical power, its first side surface S8 is convex, and its second side surface S9 is convex. The fifth lens L5 is a concave-convex lens with positive optical power, its first side surface S10 is concave, and its second side surface S11 is convex. The sixth lens L6 is a convex-convex lens with positive optical power, its first side surface S12 is convex, and its second side surface S13 is convex.

[0137] The optical lens may also include an aperture stop STO, which can be positioned between the second lens L2 and the third lens L3 to effectively converge the light entering the optical system and facilitate a small f-number (FNO). For example, the aperture stop STO can be positioned between the second lens L2 and the third lens L3, near the first side surface S6 of the third lens L3.

[0138] When the optical lens is used for imaging, light from the object passes through each surface S1 to S13 in sequence and is finally imaged on the imaging surface; when the optical lens is used for projection, light from the image source surface passes through each surface S13 to S1 in sequence and is finally projected onto the target object (not shown).

[0139] Table 3 shows the radius of curvature R, thickness / distance d, refractive index N, and Abbe number Vd of each lens in the optical lens of Example 2. Table 4 shows the conic coefficients and higher-order coefficients that can be used for each aspherical mirror in Example 2, wherein each aspherical surface shape can be defined by formula (1) given in Example 1 above.

[0140]

[0141] Table 3

[0142] Face number k A4 A6 A8 A10 A12 A14 S3 1.1159 8.8480E-03 -8.0879E-04 4.0719E-05 -4.9362E-07 -1.5689E-07 0 S4 -1.2591 2.0204E-02 -1.4988E-03 2.1600E-04 -5.1029E-05 1.7805E-06 0 S12 0.6286 -2.2006E-03 1.5029E-04 -2.0596E-05 2.3096E-06 -1.7187E-07 0 S13 1.7360 4.1210E-03 -5.2923E-05 9.7443E-06 -3.1310E-06 8.4036E-08 3.6219E-09

[0143] Table 4

[0144] Example 3

[0145] The following is for reference Figure 3 An optical lens according to Embodiment 3 of this application is described. Figure 3 A schematic diagram of the structure of an optical lens according to Embodiment 3 of this application is shown.

[0146] like Figure 3 As shown, the optical lens includes, in sequence from the first side to the second side, 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.

[0147] The first lens L1 is a convex-concave lens with negative optical power, its first side surface S1 is convex, and its second side surface S2 is concave. The second lens L2 is a convex-concave lens with negative optical power, its first side surface S3 is convex, and its second side surface S4 is concave. The third lens L3 is a concave-convex lens with positive optical power, its first side surface S6 is concave, and its second side surface S7 is convex. The fourth lens L4 is a convex-convex lens with positive optical power, its first side surface S8 is convex, and its second side surface S9 is convex. The fifth lens L5 is a concave-convex lens with positive optical power, its first side surface S10 is concave, and its second side surface S11 is convex. The sixth lens L6 is a convex-concave lens with positive optical power, its first side surface S12 is convex, and its second side surface S13 is concave.

[0148] The optical lens may also include an aperture stop STO, which can be positioned between the second lens L2 and the third lens L3 to effectively converge the light entering the optical system and facilitate a small f-number (FNO). For example, the aperture stop STO can be positioned between the second lens L2 and the third lens L3, near the first side surface S6 of the third lens L3.

[0149] When the optical lens is used for imaging, light from the object passes through each surface S1 to S13 in sequence and is finally imaged on the imaging surface; when the optical lens is used for projection, light from the image source surface passes through each surface S13 to S1 in sequence and is finally projected onto the target object (not shown).

[0150] Table 5 shows the radius of curvature R, thickness / distance d, refractive index N, and Abbe number Vd of each lens in the optical lens of Example 3. Table 6 shows the conic coefficients and higher-order coefficients that can be used for each aspherical mirror in Example 3, wherein each aspherical surface shape can be defined by formula (1) given in Example 1 above.

[0151]

[0152] Table 5

[0153]

[0154]

[0155] Table 6

[0156] Example 4

[0157] The following is for reference Figure 4 An optical lens according to Embodiment 4 of this application is described. Figure 4 A schematic diagram of the structure of an optical lens according to Embodiment 4 of this application is shown.

[0158] like Figure 4 As shown, the optical lens includes, in sequence from the first side to the second side, 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.

[0159] The first lens L1 is a convex-concave lens with negative optical power, its first side surface S1 is convex, and its second side surface S2 is concave. The second lens L2 is a convex-concave lens with negative optical power, its first side surface S3 is convex, and its second side surface S4 is concave. The third lens L3 is a concave-convex lens with positive optical power, its first side surface S6 is concave, and its second side surface S7 is convex. The fourth lens L4 is a convex-convex lens with positive optical power, its first side surface S8 is convex, and its second side surface S9 is convex. The fifth lens L5 is a concave-convex lens with positive optical power, its first side surface S10 is concave, and its second side surface S11 is convex. The sixth lens L6 is a convex-concave lens with positive optical power, its first side surface S12 is convex, and its second side surface S13 is concave.

[0160] The optical lens may also include an aperture stop STO, which can be positioned between the second lens L2 and the third lens L3 to effectively converge the light entering the optical system and facilitate a small f-number (FNO). For example, the aperture stop STO can be positioned between the second lens L2 and the third lens L3, near the first side surface S6 of the third lens L3.

[0161] When the optical lens is used for imaging, light from the object passes through each surface S1 to S13 in sequence and is finally imaged on the imaging surface; when the optical lens is used for projection, light from the image source surface passes through each surface S13 to S1 in sequence and is finally projected onto the target object (not shown).

[0162] Table 7 shows the radius of curvature R, thickness / distance d, refractive index N, and Abbe number Vd of each lens in the optical lens of Example 4. Table 8 shows the conic coefficients and higher-order coefficients that can be used for each aspherical mirror in Example 4, wherein each aspherical surface shape can be defined by formula (1) given in Example 1 above.

[0163]

[0164]

[0165] Table 7

[0166] Face number k A4 A6 A8 A10 A12 A14 S3 -3.2374 1.2567E-02 -8.6186E-04 6.6809E-05 -1.8122E-06 -1.5948E-07 0 S4 0.2032 1.7934E-02 -1.2659E-03 9.6311E-05 -3.9548E-05 9.8701E-07 0 S12 -0.3305 -8.1954E-04 5.5655E-04 -1.0002E-04 5.5856E-06 -3.5414E-07 0 S13 -10.0000 4.3175E-03 3.0019E-04 5.1006E-05 -3.4457E-05 2.3158E-06 0

[0167] Table 8

[0168] Example 5

[0169] The following is for reference Figure 5 An optical lens according to Embodiment 5 of this application is described. Figure 5 A schematic diagram of the structure of an optical lens according to Embodiment 5 of this application is shown.

[0170] like Figure 5As shown, the optical lens includes, in sequence from the first side to the second side, 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.

[0171] The first lens L1 is a convex-concave lens with negative optical power, its first side surface S1 is convex, and its second side surface S2 is concave. The second lens L2 is a convex-concave lens with negative optical power, its first side surface S3 is convex, and its second side surface S4 is concave. The third lens L3 is a concave-convex lens with positive optical power, its first side surface S6 is concave, and its second side surface S7 is convex. The fourth lens L4 is a convex-concave lens with positive optical power, its first side surface S8 is convex, and its second side surface S9 is concave. The fifth lens L5 is a concave-convex lens with positive optical power, its first side surface S10 is concave, and its second side surface S11 is convex. The sixth lens L6 is a convex-convex lens with positive optical power, its first side surface S12 is convex, and its second side surface S13 is convex.

[0172] The optical lens may also include an aperture stop STO, which can be positioned between the second lens L2 and the third lens L3 to effectively converge the light entering the optical system and facilitate a small f-number (FNO). For example, the aperture stop STO can be positioned between the second lens L2 and the third lens L3, near the first side surface S6 of the third lens L3.

[0173] When the optical lens is used for imaging, light from the object passes through each surface S1 to S13 in sequence and is finally imaged on the imaging surface; when the optical lens is used for projection, light from the image source surface passes through each surface S13 to S1 in sequence and is finally projected onto the target object (not shown).

[0174] Table 9 shows the radius of curvature R, thickness / distance d, refractive index N, and Abbe number Vd of each lens in the optical lens of Example 5. Table 10 shows the conic coefficients and higher-order coefficients that can be used for each aspherical mirror in Example 5, wherein each aspherical surface shape can be defined by formula (1) given in Example 1 above.

[0175]

[0176]

[0177] Table 9

[0178] Face number k A4 A6 A8 A10 A12 A14 S3 -0.0038 8.5881E-03 -7.6853E-04 2.5413E-05 -3.3786E-08 -1.0053E-07 0 S4 -1.0750 2.0244E-02 -1.3662E-03 2.0876E-04 -6.2008E-05 5.5168E-06 0 S12 0.5178 -1.0047E-03 7.0140E-05 -3.5365E-05 2.7117E-06 -2.6930E-07 0 S13 -31.5600 3.4134E-03 -2.1222E-04 1.5936E-05 -5.5929E-06 1.7718E-07 5.49063E-09

[0179] Table 10

[0180] Example 6

[0181] The following is for reference Figure 6 An optical lens according to Embodiment 6 of this application is described. Figure 6 A schematic diagram of the structure of an optical lens according to Embodiment 6 of this application is shown.

[0182] like Figure 6 As shown, the optical lens includes, in sequence from the first side to the second side, 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.

[0183] The first lens L1 is a convex-concave lens with negative optical power, its first side surface S1 is convex, and its second side surface S2 is concave. The second lens L2 is a convex-concave lens with negative optical power, its first side surface S3 is convex, and its second side surface S4 is concave. The third lens L3 is a concave-convex lens with positive optical power, its first side surface S6 is concave, and its second side surface S7 is convex. The fourth lens L4 is a convex-concave lens with positive optical power, its first side surface S8 is convex, and its second side surface S9 is concave. The fifth lens L5 is a concave-convex lens with positive optical power, its first side surface S10 is concave, and its second side surface S11 is convex. The sixth lens L6 is a convex-convex lens with positive optical power, its first side surface S12 is convex, and its second side surface S13 is convex.

[0184] The optical lens may also include an aperture stop STO, which can be positioned between the second lens L2 and the third lens L3 to effectively converge the light entering the optical system and facilitate a small f-number (FNO). For example, the aperture stop STO can be positioned between the second lens L2 and the third lens L3, near the first side surface S6 of the third lens L3.

[0185] When the optical lens is used for imaging, light from the object passes through each surface S1 to S13 in sequence and is finally imaged on the imaging surface; when the optical lens is used for projection, light from the image source surface passes through each surface S13 to S1 in sequence and is finally projected onto the target object (not shown).

[0186] Table 11 shows the radius of curvature R, thickness / distance d, refractive index N, and Abbe number Vd of each lens in the optical lens of Example 6. Table 12 shows the conic coefficients and higher-order coefficients that can be used for each aspherical mirror in Example 6, wherein each aspherical surface shape can be defined by formula (1) given in Example 1 above.

[0187]

[0188] Table 11

[0189] Face number k A4 A6 A8 A10 A12 A14 S3 -0.0212 8.5778E-03 -7.6932E-04 3.0377E-05 -4.0170E-08 -1.4939E-07 0 S4 -1.0715 2.0262E-02 -1.6484E-03 2.0841E-04 -7.4281E-05 5.5246E-06 0 S12 0.4658 -1.0286E-03 6.8860E-05 -3.5367E-05 2.7119E-06 -2.7016E-07 0 S13 -31.3722 3.3987E-03 -2.1489E-04 1.5702E-05 -3.8899E-06 1.7819E-07 5.75542E-09

[0190] Table 12

[0191] Example 7

[0192] The following is for reference Figure 7 An optical lens according to Embodiment 7 of this application is described. Figure 7 A schematic diagram of the structure of an optical lens according to Embodiment 7 of this application is shown.

[0193] like Figure 7 As shown, the optical lens includes, in sequence from the first side to the second side, 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.

[0194] The first lens L1 is a convex-concave lens with negative optical power, its first side surface S1 is convex, and its second side surface S2 is concave. The second lens L2 is a convex-concave lens with negative optical power, its first side surface S3 is convex, and its second side surface S4 is concave. The third lens L3 is a concave-convex lens with positive optical power, its first side surface S6 is concave, and its second side surface S7 is convex. The fourth lens L4 is a convex-concave lens with positive optical power, its first side surface S8 is convex, and its second side surface S9 is concave. The fifth lens L5 is a concave-convex lens with positive optical power, its first side surface S10 is concave, and its second side surface S11 is convex. The sixth lens L6 is a convex-concave lens with positive optical power, its first side surface S12 is convex, and its second side surface S13 is concave.

[0195] The optical lens may also include an aperture stop STO, which can be positioned between the second lens L2 and the third lens L3 to effectively converge the light entering the optical system and facilitate a small f-number (FNO). For example, the aperture stop STO can be positioned between the second lens L2 and the third lens L3, near the first side surface S6 of the third lens L3.

[0196] When the optical lens is used for imaging, light from the object passes through each surface S1 to S13 in sequence and is finally imaged on the imaging surface; when the optical lens is used for projection, light from the image source surface passes through each surface S13 to S1 in sequence and is finally projected onto the target object (not shown).

[0197] Table 13 shows the radius of curvature R, thickness / distance d, refractive index N, and Abbe number Vd of each lens in the optical lens of Example 7. Table 14 shows the conic coefficients and higher-order coefficients that can be used for each aspherical mirror in Example 7, wherein each aspherical surface shape can be defined by formula (1) given in Example 1 above.

[0198]

[0199] Table 13

[0200] Face number k A4 A6 A8 A10 A12 A14 S3 -3.7227 1.2752E-02 -8.5975E-04 6.5402E-05 -3.8280E-07 -2.1125E-07 0 S4 2.1859 1.6446E-02 -1.7847E-03 4.1420E-04 -6.5599E-05 1.4322E-06 0 S12 -0.0081 -1.4829E-03 5.6249E-04 -8.9533E-05 2.6075E-06 -2.8225E-07 0 S13 0.0911 2.9247E-03 7.6212E-04 -2.8022E-05 -3.8652E-05 3.0768E-06 0

[0201] Table 14

[0202] Example 8

[0203] The following is for reference Figure 8 An optical lens according to Embodiment 8 of this application is described. Figure 8 A schematic diagram of the structure of an optical lens according to Embodiment 8 of this application is shown.

[0204] like Figure 8 As shown, the optical lens includes, in sequence from the first side to the second side, 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.

[0205] The first lens L1 is a convex-concave lens with negative optical power, its first side surface S1 is convex, and its second side surface S2 is concave. The second lens L2 is a convex-concave lens with negative optical power, its first side surface S3 is convex, and its second side surface S4 is concave. The third lens L3 is a concave-convex lens with positive optical power, its first side surface S6 is concave, and its second side surface S7 is convex. The fourth lens L4 is a convex-concave lens with positive optical power, its first side surface S8 is convex, and its second side surface S9 is concave. The fifth lens L5 is a concave-convex lens with positive optical power, its first side surface S10 is concave, and its second side surface S11 is convex. The sixth lens L6 is a convex-concave lens with positive optical power, its first side surface S12 is convex, and its second side surface S13 is concave.

[0206] The optical lens may also include an aperture stop STO, which can be positioned between the second lens L2 and the third lens L3 to effectively converge the light entering the optical system and facilitate a small f-number (FNO). For example, the aperture stop STO can be positioned between the second lens L2 and the third lens L3, near the first side surface S6 of the third lens L3.

[0207] When the optical lens is used for imaging, light from the object passes through each surface S1 to S13 in sequence and is finally imaged on the imaging surface; when the optical lens is used for projection, light from the image source surface passes through each surface S13 to S1 in sequence and is finally projected onto the target object (not shown).

[0208] Table 15 shows the radius of curvature R, thickness / distance d, refractive index N, and Abbe number Vd of each lens in the optical lens of Example 8. Table 16 shows the conic coefficients and higher-order coefficients that can be used for each aspherical mirror in Example 8, wherein each aspherical surface shape can be defined by formula (1) given in Example 1 above.

[0209]

[0210] Table 15

[0211] Face number k A4 A6 A8 A10 A12 A14 S3 -4.2854 1.2733E-02 -8.6067E-04 6.5375E-05 -3.9407E-07 -2.1452E-07 0 S4 2.1803 1.6442E-02 -1.7982E-03 4.1170E-04 -6.5674E-05 1.4956E-06 0 S12 0.0926 -1.4820E-03 5.6260E-04 -9.3954E-05 1.3095E-06 -3.3739E-07 0 S13 -0.9933 2.9155E-03 7.6127E-04 -3.3716E-05 -3.8653E-05 3.3587E-06 0

[0212] Table 16

[0213] In summary, Examples 1 to 8 satisfy the relationships shown in Tables 17-1 and 17-2 below, respectively. In Tables 17-1 and 17-2, the units of F, EPD, TTL, H, BFL, D, R1, R2, R6, R7, R10, R11, d10, SAG3, SAG4, F1, F2, F3, F4, F5, F6, and F23 are all millimeters (mm), the unit of FOV is degrees (°), and the unit of θ is radians.

[0214]

[0215]

[0216] Table 17-1

[0217]

[0218]

[0219] Table 17-2

[0220] This application also provides an electronic device that may include an optical lens according to the above embodiments of this application and an imaging element for converting an optical image formed by the optical lens into an electrical signal. The electronic device may be a stand-alone electronic device, such as a rangefinder camera, or an imaging module integrated into a rangefinder device. Furthermore, the electronic device may also be a stand-alone imaging device, such as an in-vehicle camera, or an imaging module integrated into a driver assistance system, such as a vehicle-mounted camera.

[0221] The above description is merely a preferred embodiment of this application and an explanation of the technical principles employed. Those skilled in the art should understand that the scope of the invention involved in this application is not limited to technical solutions formed by specific combinations of the above-described technical features, but should also cover other technical solutions formed by arbitrary combinations of the above-described technical features or their equivalents without departing from the inventive concept. For example, technical solutions formed by substituting the above features with (but not limited to) technical features with similar functions disclosed in this application.

Claims

1. An optical lens, characterized in that, The optical lens comprises, sequentially from the first side to the second side along the optical axis: A first lens with negative optical power has a first side surface that is convex and a second side surface that is concave. A second lens with negative optical power has a first convex surface and a second concave surface; A third lens with positive optical power has a concave first side and a convex second side. The fourth lens with positive optical power has a convex first side surface; A fifth lens with positive optical power, wherein its first side surface is concave and its second side surface is convex; and The sixth lens, which has positive optical power, has a convex first side surface; The optical lens has six lenses with optical power. The total effective focal length F of the optical lens, the maximum field of view (FOV) of the optical lens, and the image height H corresponding to the maximum field of view of the optical lens satisfy: 1.1 ≥ |F×tan(FOV / 2) / (H / 2)| ≥ 0.9; The distance TTL from the center of the first side of the first lens to the imaging surface of the optical lens on the optical axis satisfies the following condition: 8.931≤TTL / F≤12.

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

3. The optical lens according to claim 1, characterized in that, The second lens and / or the sixth lens have aspherical mirror surfaces.

4. The optical lens according to claim 1, characterized in that, The optical lens also includes an aperture stop disposed between the second lens and the third lens.

5. The optical lens according to any one of claims 1-4, characterized in that, The total effective focal length F of the optical lens and the entrance pupil diameter EPD of the optical lens satisfy the following condition: F / EPD≤1.

5.

6. The optical lens according to any one of claims 1-4, characterized in that, The distance TTL from the center of the first side of the first lens to the imaging surface of the optical lens on the optical axis, the maximum field of view (FOV) of the optical lens, and the image height H corresponding to the maximum field of view of the optical lens satisfy: TTL / H / FOV×1°≤0.

08.

7. The optical lens according to any one of claims 1-4, characterized in that, The distance TTL from the center of the first side of the first lens to the imaging surface of the optical lens on the optical axis, the image height H corresponding to the maximum field of view of the optical lens, and the radian value θ corresponding to the maximum field of view of the optical lens satisfy: 2.841≤TTL / H / θ≤5.

8. The optical lens according to any one of claims 1-4, characterized in that, The distance BFL from the center of the second side of the sixth lens to the imaging surface of the optical lens on the optical axis and the distance TTL from the center of the first side of the first lens to the imaging surface of the optical lens on the optical axis satisfy the following condition: 0.125 ≥ BFL / TTL ≥ 0.

08.

9. The optical lens according to any one of claims 1-4, characterized in that, The maximum field of view (FOV) of the optical lens, the maximum aperture D of the first side of the first lens corresponding to the maximum field of view of the optical lens, and the image height H corresponding to the maximum field of view of the optical lens satisfy the following: D / H / FOV×1°≤0.

05.

10. The optical lens according to any one of claims 1-4, characterized in that, The maximum field of view (FOV) of the optical lens, the total effective focal length (F) of the optical lens, and the image height (H) corresponding to the maximum field of view of the optical lens satisfy the following condition: 44.966°≤(FOV×F) / H≤60°.

11. The optical lens according to any one of claims 1-4, characterized in that, The sag SAG4 at the maximum aperture of the second side of the second lens and the sag SAG3 at the maximum aperture of the first side of the second lens satisfy: 0.5≤SAG4 / SAG3≤1.

6.

12. The optical lens according to any one of claims 1-4, characterized in that, The radius of curvature R1 of the first side surface of the first lens and the radius of curvature R2 of the second side surface of the first lens satisfy: 2.438≥R1 / R2≥1.

6.

13. The optical lens according to any one of claims 1-4, characterized in that, The radius of curvature R6 of the first side surface of the third lens and the radius of curvature R7 of the second side surface of the third lens satisfy: 13.887≥R6 / R7≥1.

6.

14. The optical lens according to any one of claims 1-4, characterized in that, The effective focal length F5 of the fifth lens and the total effective focal length F of the optical lens satisfy the following condition: 40.380≥F5 / F≥1.

8.

15. The optical lens according to any one of claims 1-4, 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 condition: 3.688≥F6 / F≥1.

8.

16. The optical lens according to any one of claims 1-4, characterized in that, The maximum aperture D of the first side of the first lens corresponding to the maximum field of view of the optical lens, the image height H corresponding to the maximum field of view of the optical lens, and the total effective focal length F of the optical lens satisfy: D / H / F≤1.3mm -1 .

17. The optical lens according to any one of claims 1-4, characterized in that, The effective focal length F1 of the first lens and the effective focal length F2 of the second lens satisfy: 1.7 ≥ F1 / F2 ≥ 0.

5.

18. The optical lens according to any one of claims 1-4, characterized in that, The combined focal length F23 of the second lens and the third lens satisfies the following condition with respect to the total effective focal length F of the optical lens: 19.298 ≥ F23 / F ≥ 1.

8.

19. The optical lens according to any one of claims 1-4, characterized in that, The maximum aperture D of the first side of the first lens corresponding to the maximum field of view of the optical lens, the image height H corresponding to the maximum field of view of the optical lens, and the radian value θ corresponding to the maximum field of view of the optical lens satisfy: D / H / θ≤1.

8.

20. The optical lens according to any one of claims 1-4, characterized in that, The total effective focal length F of the optical lens, the radian value θ corresponding to the maximum field of view of the optical lens, and the maximum aperture D of the first side of the first lens corresponding to the maximum field of view of the optical lens satisfy: 0.383≥F×θ / D≥0.

2.

21. The optical lens according to any one of claims 1-4, characterized in that, The effective focal length F2 of the second lens and the effective focal length F3 of the third lens satisfy the condition: -1.5≤F2 / F3≤-0.

5.

22. The optical lens according to any one of claims 1-4, characterized in that, The effective focal length F4 of the fourth lens and the total effective focal length F of the optical lens satisfy the following condition: 7.734 ≥ F4 / F ≥ 1.

8.

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

Images