Optical lens and electronic device

Abstract

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

Description

TECHNICAL FIELD

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

[0002] With the continuous development of optical lens technology, optical lenses are increasingly widely used, and play an irreplaceable role in many fields including smart phones, security monitoring, automotive auxiliary driving, intelligent detection, virtual reality, etc. At the same time, lens manufacturers in various fields are also actively investing in and committed to researching and improving the performance and technology of optical lenses in order to improve the quality and competitiveness of their own products.

[0003] Thanks to the rapid development of automotive auxiliary driving systems in recent years, lenses have been increasingly widely used in vehicles, including vehicle-mounted reversing visual systems, vehicle recorders, automatic parking and panoramic parking systems, road navigation systems, etc. Vehicle-mounted lenses are key components for automatic driving auxiliary systems to obtain external information. With the continuous development of technology, the requirements for small distortion and small FNO of lenses are becoming more and more prominent. For example, for some special application lenses, in order to increase the amount of light, a small FNO is usually required. However, most of the existing solutions have a large FNO and a small amount of light. In order to improve the image quality, the number of lenses is usually increased, which increases the volume and weight of the lens, is not conducive to the miniaturization of the lens, and also causes the cost to rise. For some special application lenses, the image quality is poor due to the influence of harsh environments, so there is a high requirement for stable imaging in a large temperature range. In addition, for some applications such as laser radar lenses, high resolution needs to be achieved, so a larger lens chip size is required, while the existing lenses generally have a relatively small chip size.

[0004] Therefore, how to solve or improve the above problems so that the lens can better meet the high requirements of the continuous development of market applications has always been the relentless pursuit of those skilled in the art. SUMMARY

[0005] The present application provides an optical lens, which can include, in order from a first side to a second side along an optical axis: a first lens having a negative focal power, a first side of which is a convex surface and a second side of which is a concave surface; a second lens having a negative focal power, a first side of which is a convex surface and a second side of which is a concave surface; a third lens having a negative focal power, a first side of which is a concave surface and a second side of which is a convex surface; a fourth lens having a positive focal power, a first side of which is a convex surface; a fifth lens having a positive focal power, a first side of which is a convex surface; and a sixth lens having a positive focal power, a second side of which is a convex surface.

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

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

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

[0009] In an embodiment, the second side surface of the fifth lens is a concave surface.

[0010] In an embodiment, the first side surface of the sixth lens is a concave surface.

[0011] In an embodiment, the first side surface of the sixth lens is a convex surface.

[0012] In an embodiment, the second lens has an aspheric mirror surface.

[0013] In an embodiment, the sixth lens has an aspheric mirror surface.

[0014] In an embodiment, the optical lens further comprises a diaphragm arranged between the third lens and the fourth lens.

[0015] In an embodiment, the sixth lens has at least one inflection point.

[0016] In an embodiment, the total effective focal length F of the optical lens and the entrance pupil diameter ENPD of the optical lens can satisfy: F / ENPD≤1.5.

[0017] In an embodiment, the distance TTL from the center of the first side surface of the first lens to the imaging surface of the optical lens on the optical axis and the total effective focal length F of the optical lens can satisfy: TTL / F≤13.

[0018] In an embodiment, the distance TTL from the center of the first side surface of the first lens to the imaging surface of the optical lens on the optical axis and the maximum field of view angle FOV of the optical lens and the image height H corresponding to the maximum field of view angle of the optical lens can satisfy: (TTLx180°) / (HxFOV)≤9.

[0019] In an embodiment, the distance BFL from the center of the second side surface of the sixth lens to the imaging surface of the optical lens on the optical axis and the distance TTL from the center of the first side surface of the first lens to the imaging surface on the optical axis can satisfy: BFL / TTL≥0.08.

[0020] 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×180°) / (H×FOV)≤9.

[0021] 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≤70°.

[0022] In one embodiment, the sag SAG3 at the maximum aperture of the first side of the second lens and the sag SAG4 at the maximum aperture of the second side of the second lens can satisfy: 0.5≤SAG3 / SAG4≤1.5.

[0023] In one embodiment, the sagitta SAG12 at the maximum aperture of the first side of the sixth lens and the sagitta SAG13 at the maximum aperture of the second side of the sixth lens can satisfy: 0.5≤SAG12 / SAG13≤1.5.

[0024] 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≥2.

[0025] In one embodiment, the radius of curvature R5 of the first side of the third lens, the center thickness CT3 of the third lens on the optical axis, and the radius of curvature R6 of the second side of the third lens can satisfy: 0.5≤(R5-CT3) / R6≤1.5.

[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 radian value θ corresponding to the maximum field of view of the optical lens can satisfy: D / H / θ≤1.5.

[0027] 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.

[0028] In one embodiment, the total effective focal length F of the optical lens and the image height H corresponding to the maximum field of view of the optical lens can satisfy: 0.1≤F / H≤1.

[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 total effective focal length F of the optical lens can satisfy: D / H / F≤1.3.

[0030] In one embodiment, the effective focal length F1 of the first lens and the total effective focal length F of the optical lens can satisfy: F1 / F≤-2.

[0031] In one embodiment, the effective focal length F2 of the second lens and the total effective focal length F of the optical lens can satisfy: F2 / F≤-3.

[0032] In one embodiment, the effective focal length F3 of the third lens and the total effective focal length F of the optical lens can satisfy: F3 / F≤-5.

[0033] 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≥3.

[0034] In one embodiment, the effective focal length F1 of the first lens and the effective focal length F2 of the second lens can satisfy: 0.3≤F1 / F2≤1.5.

[0035] In one embodiment, the effective focal length F4 of the fourth lens and the effective focal length F5 of the fifth lens can satisfy: 0.3≤F4 / F5≤1.8.

[0036] In one embodiment, the effective focal length F5 of the fifth lens and the effective focal length F6 of the sixth lens can satisfy: F5 / F6≥0.2.

[0037] In one embodiment, the center thickness CT1 of the first lens on the optical axis, the center thickness CT2 of the second lens on the optical axis, and the center thickness CT3 of the third lens on the optical axis can satisfy: CT1 / (CT2+CT3)≤0.5.

[0038] In one embodiment, the total effective focal length F of the optical lens and the air gap T34 between the third lens and the fourth lens on the optical axis can satisfy: F / T34≥2.

[0039] In one embodiment, the center thickness CT6 of the sixth lens on the optical axis, the center thickness CT4 of the fourth lens on the optical axis, and the center thickness CT5 of the fifth lens on the optical axis can satisfy: CT6 / (CT4+CT5)≥0.2.

[0040] In one embodiment, the air gap distance T45 between the fourth lens and the fifth lens on the optical axis, the air gap distance T56 between the fifth lens and the sixth lens on the optical axis, the air gap distance T12 between the first lens and the second lens on the optical axis, and the air gap distance T23 between the second lens and the third lens on the optical axis can satisfy: (T45+T56) / (T12+T23)≥0.2.

[0041] In one embodiment, the effective focal length F3 of the third lens and the effective focal length F6 of the sixth lens can satisfy: F3 / F6≤-5.

[0042] This application also provides an optical lens that, along the optical axis from a first side to a second side, sequentially includes: a first lens with negative optical power; a second lens with negative optical power; a third lens with negative 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 distance TTL from the center of the first side of the first lens to the imaging plane of the optical lens along the optical axis and the total effective focal length F of the optical lens can satisfy: TTL / F ≤ 13.

[0043] In one embodiment, the first side surface of the first lens is convex, and the second side surface is concave.

[0044] In one embodiment, the first side surface of the second lens is convex, and the second side surface is concave.

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

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

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

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

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

[0050] In one embodiment, the first side surface of the sixth lens is concave, and the second side surface is convex.

[0051] In one embodiment, the first side surface of the sixth lens is convex, and the second side surface is convex.

[0052] In one embodiment, the second lens has an aspherical mirror surface.

[0053] In one embodiment, the sixth lens has an aspherical mirror surface.

[0054] In one embodiment, the optical lens further includes an aperture stop disposed between the third lens and the fourth lens.

[0055] In one embodiment, the sixth lens has at least one inflection point.

[0056] In one embodiment, the total effective focal length F of the optical lens and the entrance pupil diameter ENPD of the optical lens can satisfy: F / ENPD≤1.5.

[0057] 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×180°) / (H×FOV)≤9.

[0058] 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 on the optical axis can satisfy: BFL / TTL≥0.08.

[0059] 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×180°) / (H×FOV)≤9.

[0060] 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≤70°.

[0061] In one embodiment, the sag SAG3 at the maximum aperture of the first side of the second lens and the sag SAG4 at the maximum aperture of the second side of the second lens can satisfy: 0.5≤SAG3 / SAG4≤1.5.

[0062] In one embodiment, the sagitta SAG12 at the maximum aperture of the first side of the sixth lens and the sagitta SAG13 at the maximum aperture of the second side of the sixth lens can satisfy: 0.5≤SAG12 / SAG13≤1.5.

[0063] 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≥2.

[0064] In one embodiment, the radius of curvature R5 of the first side of the third lens, the center thickness CT3 of the third lens on the optical axis, and the radius of curvature R6 of the second side of the third lens can satisfy: 0.5≤(R5-CT3) / R6≤1.5.

[0065] 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≤1.5.

[0066] 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.

[0067] In one embodiment, the total effective focal length F of the optical lens and the image height H corresponding to the maximum field of view of the optical lens can satisfy: 0.1≤F / H≤1.

[0068] 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.

[0069] In one embodiment, the effective focal length F1 of the first lens and the total effective focal length F of the optical lens can satisfy: F1 / F≤-2.

[0070] In one embodiment, the effective focal length F2 of the second lens and the total effective focal length F of the optical lens can satisfy: F2 / F≤-3.

[0071] In one embodiment, the effective focal length F3 of the third lens and the total effective focal length F of the optical lens can satisfy: F3 / F≤-5.

[0072] 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≥3.

[0073] In one embodiment, the effective focal length F1 of the first lens and the effective focal length F2 of the second lens can satisfy: 0.3≤F1 / F2≤1.5.

[0074] In one embodiment, the effective focal length F4 of the fourth lens and the effective focal length F5 of the fifth lens can satisfy: 0.3≤F4 / F5≤1.8.

[0075] In one embodiment, the effective focal length F5 of the fifth lens and the effective focal length F6 of the sixth lens can satisfy: F5 / F6≥0.2.

[0076] In one embodiment, the center thickness CT1 of the first lens on the optical axis, the center thickness CT2 of the second lens on the optical axis, and the center thickness CT3 of the third lens on the optical axis can satisfy: CT1 / (CT2+CT3)≤0.5.

[0077] In one embodiment, the total effective focal length F of the optical lens and the air gap T34 between the third lens and the fourth lens on the optical axis can satisfy: F / T34≥2.

[0078] In one embodiment, the center thickness CT6 of the sixth lens on the optical axis, the center thickness CT4 of the fourth lens on the optical axis, and the center thickness CT5 of the fifth lens on the optical axis can satisfy: CT6 / (CT4+CT5)≥0.2.

[0079] In one embodiment, the air gap distance T45 between the fourth lens and the fifth lens on the optical axis, the air gap distance T56 between the fifth lens and the sixth lens on the optical axis, the air gap distance T12 between the first lens and the second lens on the optical axis, and the air gap distance T23 between the second lens and the third lens on the optical axis can satisfy: (T45+T56) / (T12+T23)≥0.2.

[0080] In one embodiment, the effective focal length F3 of the third lens and the effective focal length F6 of the sixth lens can satisfy: F3 / F6≤-5.

[0081] 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.

[0082] 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 small Fno, large image height, low distortion, small aperture, short TTL, and high resolution, enabling the optical lens to better meet the high requirements of automotive applications. Attached Figure Description

[0083] 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:

[0084] Figure 1 This is a schematic diagram illustrating the structure of an optical lens according to Embodiment 1 of this application;

[0085] Figure 2 To illustrate the structure of the optical lens according to Embodiment 2 of this application;

[0086] Figure 3 To illustrate the structure of the optical lens according to Embodiment 3 of this application;

[0087] Figure 4 This is a schematic diagram illustrating the structure of the optical lens according to Embodiment 4 of this application;

[0088] Figure 5 This is a schematic diagram illustrating the structure of the optical lens according to Embodiment 5 of this application;

[0089] Figure 6 To illustrate the structure of the optical lens according to Embodiment 6 of this application;

[0090] Figure 7 To illustrate the structural schematic diagram of the optical lens according to Embodiment 7 of this application; and

[0091] Figure 8 This is a schematic diagram illustrating the structure of an optical lens according to Embodiment 8 of this application. Detailed Implementation

[0092] 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.

[0093] 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.

[0094] 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.

[0095] 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.

[0096] 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.

[0097] 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.

[0098] 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.

[0099] 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.

[0100] The features, principles and other aspects of this application are described in detail below.

[0101] 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.

[0102] 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).

[0103] 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 is beneficial for collecting more light into the rear optical system, increasing the light flux. The large curvature of the first side surface of the first lens is beneficial for reducing distortion.

[0104] In an exemplary embodiment, the second lens may have negative optical power. The second lens may have a convex-concave surface. The negative optical power of the second lens further collects light, resulting in a smooth transition of light path.

[0105] In an exemplary embodiment, the second lens may have an aspherical mirror surface. Having an aspherical mirror surface in the second lens is beneficial for improving resolution and compressing distortion.

[0106] In an exemplary embodiment, the third lens may have negative optical power. The third lens may have a concave-convex surface. The negative optical power of the third lens allows for adjustment of the light angle. The third lens is a telephoto lens, which helps to smoothly transition the light collected at the front end to the rear, reducing system sensitivity.

[0107] In an exemplary embodiment, the fourth lens may have positive optical power. The fourth lens may have a convex-convex surface. Having positive optical power in the fourth lens 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.

[0108] In an exemplary embodiment, the fourth lens may have positive optical power. The fourth lens may have a convex-concave surface. Having positive optical power in the fourth lens helps to compress the light collected at the front end and smoothly transition the light to the rear, reducing system sensitivity, improving image quality, and effectively reducing system CRA, making it more suitable for use in low-light environments.

[0109] In an exemplary embodiment, the fifth lens may have positive optical power. The fifth lens may have a convex-convex surface. Having positive optical power further compresses the light collected at the front end and reduces the aperture of the rear lenses, while also reducing system CRA (Crystal Reduction Aspect Ratio), making it more suitable for use in low-light environments.

[0110] In an exemplary embodiment, the fifth lens may have positive optical power. The fifth lens may have a convex-concave shape. The fifth lens is a meniscus lens with positive optical power, which helps to smoothly transmit light to the rear, thus facilitating a smaller CRA and improving illumination.

[0111] In an exemplary embodiment, the sixth lens may have positive optical power. The sixth lens may have a concave-convex surface. The sixth lens is a meniscus telephoto lens, which helps light to converge smoothly to the image plane, achieving a small CRA and improving illumination while effectively reducing system sensitivity and improving image quality.

[0112] In an exemplary embodiment, the sixth lens may have positive optical power. The sixth lens may have a convex-convex surface. The sixth lens is a biconvex lens with positive optical power, which is beneficial for compressing the light collected at the front end, achieving a small FNO, while effectively reducing system CRA and improving relative illumination.

[0113] In an exemplary embodiment, the sixth lens may have an aspherical mirror surface. Having an aspherical mirror surface in the sixth lens is beneficial for correcting the field area, compressing distortion, and achieving high resolution.

[0114] In an exemplary embodiment, the first side and / or the second side of the sixth lens may have at least one inversion point, which helps to correct field curvature, aberrations, and reduce the principal ray angle, thereby improving the image acquisition sensitivity and achieving higher energy collection.

[0115] In an exemplary embodiment, the optical lens may further include an aperture stop disposed between the third lens and the fourth lens. Positioning the aperture stop between the third and fourth lenses facilitates effective light convergence entering the optical system, and its forward placement helps achieve a small FNO (noise of non-reflection). However, it should be noted that the aperture stop positions disclosed herein are merely examples and not limitations; in alternative embodiments, the aperture stop may be positioned in other locations as needed.

[0116] In an exemplary embodiment, the optical lens according to this application satisfies the following condition: F / ENPD ≤ 1.5, where F is the total effective focal length of the optical lens and ENPD is the entrance pupil diameter of the optical lens. More specifically, F and ENPD can further satisfy: F / ENPD ≤ 1.38. Satisfying F / ENPD ≤ 1.5 allows the lens to have a small FNO, which is beneficial for increasing the amount of light entering the lens.

[0117] In an exemplary embodiment, the optical lens according to this application satisfies the following condition: TTL / F ≤ 13, 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 ≤ 11. Satisfying TTL / F ≤ 13 can effectively limit the length of the lens and achieve lens miniaturization.

[0118] In an exemplary embodiment, the optical lens according to this application satisfies: (TTL×180°) / (H×FOV)≤9, 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, 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 further satisfy: (TTL×180°) / (H×FOV)≤6.3. Satisfying (TTL×180°) / (H×FOV)≤9, under the condition of the same imaging plane and the same image height, can effectively limit the length of the lens, which is beneficial to achieving lens miniaturization.

[0119] In an exemplary embodiment, the optical lens according to this application satisfies: BFL / TTL ≥ 0.08, where BFL is the distance on the optical axis from the center of the second side 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 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, while achieving lens miniaturization, also results in a longer back focal length, which is beneficial for module assembly.

[0120] In an exemplary embodiment, the optical lens according to this application satisfies: (D×180°) / (H×FOV)≤9, 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 further satisfy: (D×180°) / (H×FOV)≤5.4. Satisfying (D×180°) / (H×FOV)≤9 allows for a small front aperture of the lens, which is beneficial for miniaturization.

[0121] In an exemplary embodiment, the optical lens according to this application satisfies: (FOV×F) / H≤70°, 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≤60°. Satisfying (FOV×F) / H≤70° allows the lens to simultaneously satisfy both short focal length and small field of view, which is beneficial for achieving low distortion.

[0122] In an exemplary embodiment, the optical lens according to this application satisfies: 0.5 ≤ SAG3 / SAG4 ≤ 1.5, where SAG3 is the sag at the maximum aperture of the first side of the second lens, and SAG4 is the sag at the maximum aperture of the second side of the second lens. More specifically, SAG3 and SAG4 can further satisfy: 0.6 ≤ SAG3 / SAG4 ≤ 1. Satisfying 0.5 ≤ SAG3 / SAG4 ≤ 1.5 ensures that the sags of the first and second sides of the second lens are close, which is beneficial for smooth light transition.

[0123] In an exemplary embodiment, the optical lens according to this application satisfies: 0.5 ≤ SAG12 / SAG13 ≤ 1.5, where SAG12 is the sag at the maximum aperture of the first side of the sixth lens, and SAG13 is the sag at the maximum aperture of the second side of the sixth lens. More specifically, SAG12 and SAG13 further satisfy: 0.6 ≤ SAG12 / SAG13 ≤ 1. Satisfying 0.5 ≤ SAG12 / SAG13 ≤ 1.5 ensures that the sags of the first and second sides of the sixth lens are close, which is beneficial for smooth light transition.

[0124] In an exemplary embodiment, the optical lens according to this application satisfies: R1 / R2≥2, 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≥3. Satisfying R1 / R2≥2 means that the radius of curvature of the first side surface and the radius of curvature of the second side surface of the first lens differs significantly, which is beneficial for quickly focusing large-angle peripheral light rays entering through the first lens and improving image quality.

[0125] In an exemplary embodiment, the optical lens according to this application satisfies: 0.5 ≤ (R5 - CT3) / R6 ≤ 1.5, where R5 is the radius of curvature of the first side of the third lens, CT3 is the center thickness of the third lens on the optical axis, and R6 is the radius of curvature of the second side of the third lens. More specifically, R5, CT3, and R6 further satisfy: 0.8 ≤ (R5 - CT3) / R6 ≤ 1.3. Satisfying 0.5 ≤ (R5 - CT3) / R6 ≤ 1.5, the special lens shape of the third lens creates an optical path difference between the peripheral light and the central light, diverging the central light and allowing it to enter the rear optical system. Furthermore, it reduces the front diameter of the lens, decreasing its size and facilitating miniaturization and cost reduction.

[0126] In an exemplary embodiment, the optical lens according to this application satisfies: D / H / θ ≤ 1.5, 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. Satisfying D / H / θ ≤ 1.5 results in a small front aperture of the lens, enabling lens miniaturization.

[0127] 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, reducing the volume of the lens's imaging system and facilitating lens miniaturization.

[0128] In an exemplary embodiment, the optical lens according to this application satisfies: 0.1 ≤ F / H ≤ 1, where 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, F and H may further satisfy: 0.2 ≤ F / H ≤ 0.8. Satisfying 0.1 ≤ F / H ≤ 1 is beneficial for improving resolution.

[0129] 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.

[0130] In an exemplary embodiment, the optical lens according to this application satisfies: F1 / F ≤ -2, where F1 is the effective focal length of the first lens and F is the total effective focal length of the optical lens. More specifically, F1 and F may further satisfy: F1 / F ≤ -3. Satisfying F1 / F ≤ -2, the first lens is a long focal length negative power lens, which, while achieving light collection, also enables smooth beam transition, reduces aberration, and improves image quality.

[0131] In an exemplary embodiment, the optical lens according to this application satisfies: F2 / F ≤ -3, where F2 is the effective focal length of the second lens and F is the total effective focal length of the optical lens. More specifically, F2 and F may further satisfy: F2 / F ≤ -4. Satisfying F2 / F ≤ -3 controls the second lens to be a negative power lens, which is beneficial for controlling the light path between the second and third lenses, resulting in a smooth light transition, reduced sensitivity, and improved image quality.

[0132] In an exemplary embodiment, the optical lens according to this application satisfies: F3 / F ≤ -5, where F3 is the effective focal length of the third lens and F is the total effective focal length of the optical lens. More specifically, F3 and F may further satisfy: F3 / F ≤ -10. Satisfying F3 / F ≤ -5 controls the third lens to be a negative power lens, which is beneficial for controlling the light path between the third and fourth lenses, helps to smooth the light transition, reduces sensitivity, and improves image quality.

[0133] In an exemplary embodiment, the optical lens according to this application satisfies: F6 / F ≥ 3, 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 ≥ 4. Satisfying F6 / F ≥ 3, the sixth lens is a long focal length positive power lens, which can smoothly converge the light beam in front to the image plane, which is beneficial to improving image quality, increasing relative illumination, and reducing CRA.

[0134] In an exemplary embodiment, the optical lens according to this application satisfies: 0.3 ≤ F1 / F2 ≤ 1.5, 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 may further satisfy: 0.5 ≤ F1 / F2 ≤ 1.2. Satisfying 0.3 ≤ F1 / F2 ≤ 1.5 means that the focal lengths of adjacent first and second lenses are similar, which helps to smooth the light transition and is beneficial to image quality improvement.

[0135] In an exemplary embodiment, the optical lens according to this application satisfies: 0.3 ≤ F4 / F5 ≤ 1.8, where F4 is the effective focal length of the fourth lens and F5 is the effective focal length of the fifth lens. More specifically, F4 and F5 may further satisfy: 0.5 ≤ F4 / F5 ≤ 1.5. Satisfying 0.3 ≤ F4 / F5 ≤ 1.8 means that the adjacent fourth and fifth lenses have similar focal lengths, which helps to smooth the light transition and is beneficial to image quality improvement.

[0136] In an exemplary embodiment, the optical lens according to this application satisfies: F5 / F6 ≥ 0.2, where F5 is the effective focal length of the fifth lens and F6 is the effective focal length of the sixth lens. More specifically, F5 and F6 may further satisfy: F5 / F6 ≥ 0.5. Satisfying F5 / F6 ≥ 0.2, and rationally configuring the focal lengths of the fifth and sixth lenses so that the fifth and sixth lenses maintain the same positive optical power, is beneficial for compressing light and for high energy collection in the optical system.

[0137] In an exemplary embodiment, the optical lens according to this application satisfies the following condition: CT1 / (CT2+CT3)≤0.5, where CT1 is the center thickness of the first lens on the optical axis, CT2 is the center thickness of the second lens on the optical axis, and CT3 is the center thickness of the third lens on the optical axis. More specifically, CT1, CT2, and CT3 further satisfy: CT1 / (CT2+CT3)≤0.4. Satisfying CT1 / (CT2+CT3)≤0.5 can effectively reduce the thickness sensitivity and processing difficulty of the lens, which is beneficial to improving the lens assembly yield, reducing costs, satisfying lens manufacturability, and improving resolution.

[0138] In an exemplary embodiment, the optical lens according to this application satisfies: F / T34≥2, where F is the total effective focal length of the optical lens, and T34 is the air gap between the third and fourth lenses on the optical axis. More specifically, F and T34 can further satisfy: F / T34≥3. Satisfying F / T34≥2 reduces the air gap between the third and fourth lenses on the optical axis, which can improve assembly yield and simultaneously reduce aberrations, thereby improving image quality.

[0139] In an exemplary embodiment, the optical lens according to this application satisfies: CT6 / (CT4+CT5)≥0.2, where CT6 is the center thickness of the sixth lens on the optical axis, CT4 is the center thickness of the fourth lens on the optical axis, and CT5 is the center thickness of the fifth lens on the optical axis. More specifically, CT6, CT4, and CT5 further satisfy: CT6 / (CT4+CT5)≥0.28. Satisfying CT6 / (CT4+CT5)≥0.2, and rationally configuring the center thickness of each lens, can effectively reduce the thickness sensitivity and processing difficulty of the lens, which is beneficial to improving the lens assembly yield, reducing costs, satisfying lens manufacturability, and improving resolution.

[0140] In an exemplary embodiment, the optical lens according to this application satisfies: (T45+T56) / (T12+T23)≥0.2, where T45 is the air gap between the fourth and fifth lenses on the optical axis, T56 is the air gap between the fifth and sixth lenses on the optical axis, T12 is the air gap between the first and second lenses on the optical axis, and T23 is the air gap between the second and third lenses on the optical axis. More specifically, T45, T56, T12, and T23 further satisfy: (T45+T56) / (T12+T23)≥0.24. Satisfying (T45+T56) / (T12+T23)≥0.2, and rationally configuring the air gap between each lens on the optical axis, can effectively reduce the thickness of the lens and the sensitivity of on-axis distance, which is beneficial to improving the lens assembly yield and reducing costs.

[0141] In an exemplary embodiment, the optical lens according to this application satisfies the following condition: F3 / F6 ≤ -5, where F3 is the effective focal length of the third lens and F6 is the effective focal length of the sixth lens. More specifically, F3 and F6 may further satisfy: F3 / F6 ≤ -10. Satisfying F3 / F6 ≤ -5, and rationally allocating the focal length values ​​of the third and sixth lenses, not only improves resolution but also helps to improve the optical performance of the product at different temperatures.

[0142] In an exemplary embodiment, the optical lens of this application may further include a filter and / or protective glass disposed between the sixth lens and the imaging plane, as needed. The filter can filter light with a specific wavelength, while the protective glass can prevent damage to the second-side components (e.g., chips) of the optical lens.

[0143] In an exemplary embodiment, the first lens may be a spherical lens or an aspherical lens; the second lens may be an aspherical lens; the third lens may be a spherical lens or an aspherical lens; the fourth lens may be a spherical lens or an aspherical lens; the fifth lens may be a spherical lens or an aspherical lens; and the sixth lens may be an aspherical lens. This application does not specifically limit the number of spherical and aspherical lenses; when focusing on resolving quality, the number of aspherical lenses can be increased. Specifically, to improve the resolving quality of the optical system, the first, second, third, fourth, fifth, and sixth lenses may all be aspherical lenses. The characteristic of an aspherical lens is that its curvature changes continuously from the center to the periphery. Unlike a spherical lens, which has a constant curvature from the center to the periphery, an aspherical lens has better curvature radius characteristics, offering advantages in improving distortion aberrations and astigmatism. By using aspherical lenses, aberrations occurring during imaging can be eliminated as much as possible, thereby improving the image quality of the lens. The use of aspherical lenses helps correct system aberrations and improve resolution.

[0144] 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.

[0145] The optical lens according to the above embodiments of this application achieves at least one beneficial effect such as small Fno, large image height, small distortion, small aperture, short TTL, and high resolution by reasonably setting parameters such as the shape and optical power of each lens, so that the optical lens can better adapt to the ever-evolving requirements of automotive applications.

[0146] 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.

[0147] Example 1

[0148] 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.

[0149] 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.

[0150] 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 negative optical power, its first side surface S5 is concave, and its second side surface S6 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 convex-convex lens with positive optical power, its first side surface S10 is convex, and its second side surface S11 is convex. The sixth lens L6 is a concave-convex lens with positive optical power, its first side surface S12 is concave, and its second side surface S13 is convex.

[0151] The optical lens may also include an aperture stop STO, which can be positioned between the third lens L3 and the fourth lens L4. This facilitates the effective focusing of light entering the optical system, and the forward positioning of the aperture stop helps to achieve a small f-number (FNO). For example, the aperture stop STO can be positioned between the third lens L3 and the fourth lens L4, near the first side surface S8 of the fourth lens L4.

[0152] In this embodiment, the first side surface S12 of the sixth lens L6 may have at least one inversion point, which helps to correct field curvature, aberrations, and reduce the principal ray angle, thereby improving the image acquisition sensitivity and achieving higher energy collection.

[0153] 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).

[0154] Table 1 shows the radius of curvature R, thickness CT / distance T, refractive index N, and Abbe number Vd of each lens in the optical lens of Embodiment 1. Regarding "thickness CT / distance T", it should be understood that the thickness CT / distance T in the row containing S1 is the center thickness CT1 of the first lens L1; the thickness CT / distance T in the row containing S2 is the air gap distance T12 between the first lens L1 and the second lens L2; ​​the thickness CT / distance T in the row containing S3 is the center thickness CT2 of the second lens L2; ​​the thickness CT / distance T in the row containing S4 is the air gap distance T23 between the second lens L2 and the third lens L3, and so on.

[0155]

[0156] Table 1

[0157] 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:

[0158]

[0159] 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 and A12 that can be used for the aspherical mirrors S3, S4, S12 and S13 in Example 1.

[0160] Face number k A4 A6 A8 A10 A12 S3 22.3945 2.0502E-03 -4.0813E-05 1.7554E-07 2.8411E-08 -1.1170E-09 S4 -0.4656 3.8325E-03 2.7055E-05 -4.7882E-06 9.9755E-07 -4.7035E-08 S12 463.5286 -1.8430E-03 -1.5179E-05 8.3910E-07 6.2485E-08 -1.7997E-09 S13 -1.2798 -4.5242E-04 -1.1778E-06 1.0892E-06 1.0237E-08 -9.6173E-10

[0161] Table 2

[0162] Example 2

[0163] 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.

[0164] 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.

[0165] 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 negative optical power, its first side surface S5 is concave, and its second side surface S6 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 convex-convex lens with positive optical power, its first side surface S10 is convex, and its second side surface S11 is convex. The sixth lens L6 is a concave-convex lens with positive optical power, its first side surface S12 is concave, and its second side surface S13 is convex.

[0166] The optical lens may also include an aperture stop STO, which can be positioned between the third lens L3 and the fourth lens L4. This facilitates the effective focusing of light entering the optical system, and the forward positioning of the aperture stop helps to achieve a small f-number (FNO). For example, the aperture stop STO can be positioned between the third lens L3 and the fourth lens L4, near the first side surface S8 of the fourth lens L4.

[0167] In this embodiment, the first side surface S12 of the sixth lens L6 may have at least one inversion point, which helps to correct field curvature, aberrations, and reduce the principal ray angle, thereby improving the image acquisition sensitivity and achieving higher energy collection.

[0168] 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).

[0169] Table 3 shows the radius of curvature R, thickness CT / distance T, 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.

[0170]

[0171] Table 3

[0172] Face number k A4 A6 A8 A10 A12 S3 22.3940 2.0502E-03 -4.0813E-05 1.7553E-07 2.8410E-08 -1.1170E-09 S4 -0.4655 3.8325E-03 2.7056E-05 -4.7881E-06 9.9756E-07 -4.7034E-08 S12 463.7037 -1.8430E-03 -1.5186E-05 8.3804E-07 6.2439E-08 -1.7859E-09 S13 -1.2795 -4.5244E-04 -1.1779E-06 1.0894E-06 1.0259E-08 -9.5944E-10

[0173] Table 4

[0174] Example 3

[0175] 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.

[0176] 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.

[0177] 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 negative optical power, its first side surface S5 is concave, and its second side surface S6 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 convex-concave lens with positive optical power, its first side surface S10 is convex, and its second side surface S11 is concave. 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.

[0178] The optical lens may also include an aperture stop STO, which can be positioned between the third lens L3 and the fourth lens L4. This facilitates the effective focusing of light entering the optical system, and the forward positioning of the aperture stop helps to achieve a small f-number (FNO). For example, the aperture stop STO can be positioned between the third lens L3 and the fourth lens L4, near the first side surface S8 of the fourth lens L4.

[0179] In this embodiment, the first side surface S12 of the sixth lens L6 may have at least one inversion point, which helps to correct field curvature, aberrations, and reduce the principal ray angle, thereby improving the image acquisition sensitivity and achieving higher energy collection.

[0180] 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).

[0181] Table 5 shows the radius of curvature R, thickness CT / distance T, 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.

[0182]

[0183] Table 5

[0184] Face number k A4 A6 A8 A10 A12 S3 7.3574 1.9644E-03 -4.7796E-05 -5.3700E-08 3.2052E-08 -6.1360E-10 S4 -1.5718 3.5452E-03 1.3452E-05 -7.2874E-06 5.1751E-07 -1.1490E-08 S12 -1658.2948 -1.7041E-03 -5.5535E-05 -3.4714E-06 5.3909E-07 -1.1082E-08 S13 -0.2640 -5.1832E-04 -3.9959E-06 2.4017E-06 -1.2088E-07 7.1994E-09

[0185] Table 6

[0186] Example 4

[0187] The following is for reference Figure 4 An optical lens according to Embodiment 4 of this application is described. Figure 4A schematic diagram of the structure of an optical lens according to Embodiment 4 of this application is shown.

[0188] 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.

[0189] 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 negative optical power, its first side surface S5 is concave, and its second side surface S6 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 convex-concave lens with positive optical power, its first side surface S10 is convex, and its second side surface S11 is concave. 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.

[0190] The optical lens may also include an aperture stop STO, which can be positioned between the third lens L3 and the fourth lens L4. This facilitates the effective focusing of light entering the optical system, and the forward positioning of the aperture stop helps to achieve a small f-number (FNO). For example, the aperture stop STO can be positioned between the third lens L3 and the fourth lens L4, near the first side surface S8 of the fourth lens L4.

[0191] In this embodiment, the first side surface S12 of the sixth lens L6 may have at least one inversion point, which helps to correct field curvature, aberrations, and reduce the principal ray angle, thereby improving the image acquisition sensitivity and achieving higher energy collection.

[0192] 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).

[0193] Table 7 shows the radius of curvature R, thickness CT / distance T, 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.

[0194]

[0195] Table 7

[0196] Face number k A4 A6 A8 A10 A12 S3 7.3568 1.9644E-03 -4.7796E-05 -5.3750E-08 3.2047E-08 -6.1392E-10 S4 -1.5718 3.5452E-03 1.3454E-05 -7.2870E-06 5.1757E-07 -1.1481E-08 S12 -1658.4747 -1.7041E-03 -5.5533E-05 -3.4708E-06 5.3915E-07 -1.1078E-08 S13 -0.2646 -5.1830E-04 -3.9923E-06 2.4021E-06 -1.2087E-07 7.1986E-09

[0197] Table 8

[0198] Example 5

[0199] 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.

[0200] like Figure 5 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.

[0201] 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 negative optical power, its first side surface S5 is concave, and its second side surface S6 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 convex-convex lens with positive optical power, its first side surface S10 is convex, 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.

[0202] The optical lens may also include an aperture stop STO, which can be positioned between the third lens L3 and the fourth lens L4. This facilitates the effective focusing of light entering the optical system, and the forward positioning of the aperture stop helps to achieve a small f-number (FNO). For example, the aperture stop STO can be positioned between the third lens L3 and the fourth lens L4, near the first side surface S8 of the fourth lens L4.

[0203] In this embodiment, the first side surface S12 of the sixth lens L6 may have at least one inversion point, which helps to correct field curvature, aberrations, and reduce the principal ray angle, thereby improving the image acquisition sensitivity and achieving higher energy collection.

[0204] 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).

[0205] Table 9 shows the radius of curvature R, thickness CT / distance T, 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.

[0206]

[0207] Table 9

[0208] Face number k A4 A6 A8 A10 A12 S3 19.0081 2.0339E-03 -4.1405E-05 1.0936E-07 2.7094E-08 -8.5211E-10 S4 -0.5108 3.8014E-03 1.8307E-05 -5.7783E-06 9.6833E-07 -4.3766E-08 S12 596.3116 -2.0114E-03 -6.3090E-05 -5.7248E-06 4.7149E-07 -6.3506E-09 S13 3.6421 -7.4631E-04 -2.8647E-05 2.1509E-07 8.7271E-08 -1.2322E-09

[0209] Table 10

[0210] Example 6

[0211] 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.

[0212] 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.

[0213] 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 negative optical power, its first side surface S5 is concave, and its second side surface S6 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 convex-convex lens with positive optical power, its first side surface S10 is convex, 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.

[0214] The optical lens may also include an aperture stop STO, which can be positioned between the third lens L3 and the fourth lens L4. This facilitates the effective focusing of light entering the optical system, and the forward positioning of the aperture stop helps to achieve a small f-number (FNO). For example, the aperture stop STO can be positioned between the third lens L3 and the fourth lens L4, near the first side surface S8 of the fourth lens L4.

[0215] In this embodiment, the first side surface S12 of the sixth lens L6 may have at least one inversion point, which helps to correct field curvature, aberrations, and reduce the principal ray angle, thereby improving the image acquisition sensitivity and achieving higher energy collection.

[0216] 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).

[0217] Table 11 shows the radius of curvature R, thickness CT / distance T, 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.

[0218]

[0219] Table 11

[0220] Face number k A4 A6 A8 A10 A12 S3 19.0084 2.0339E-03 -4.1405E-05 1.0944E-07 2.7110E-08 -8.5006E-10 S4 -0.5107 3.8015E-03 1.8314E-05 -5.7770E-06 9.6867E-07 -4.3695E-08 S12 596.9332 -2.0114E-03 -6.3085E-05 -5.7243E-06 4.7149E-07 -6.3523E-09 S13 3.6425 -7.4633E-04 -2.8649E-05 2.1481E-07 8.7253E-08 -1.2322E-09

[0221] Table 12

[0222] Example 7

[0223] 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.

[0224] 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.

[0225] 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 negative optical power, its first side surface S5 is concave, and its second side surface S6 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 convex-concave lens with positive optical power, its first side surface S10 is convex, and its second side surface S11 is concave. 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.

[0226] The optical lens may also include an aperture stop STO, which can be positioned between the third lens L3 and the fourth lens L4. This facilitates the effective focusing of light entering the optical system, and the forward positioning of the aperture stop helps to achieve a small f-number (FNO). For example, the aperture stop STO can be positioned between the third lens L3 and the fourth lens L4, near the first side surface S8 of the fourth lens L4.

[0227] In this embodiment, the first side surface S12 of the sixth lens L6 may have at least one inversion point, which helps to correct field curvature, aberrations, and reduce the principal ray angle, thereby improving the image acquisition sensitivity and achieving higher energy collection.

[0228] 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).

[0229] Table 13 shows the radius of curvature R, thickness CT / distance T, 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.

[0230]

[0231] Table 13

[0232] Face number k A4 A6 A8 A10 A12 S3 6.6749 1.9604E-03 -4.8616E-05 -9.2643E-08 3.4268E-08 -5.5466E-10 S4 -1.9749 3.4634E-03 3.7539E-06 -8.1835E-06 4.3574E-07 -6.6128E-09 S12 -1634.9491 -1.6611E-03 -4.4853E-05 -5.0646E-06 4.7850E-07 -4.7137E-09 S13 -0.8158 -4.9900E-04 3.0604E-06 1.8731E-06 -1.4933E-07 1.0782E-08

[0233] Table 14

[0234] Example 8

[0235] 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.

[0236] 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.

[0237] 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 negative optical power, its first side surface S5 is concave, and its second side surface S6 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 convex-concave lens with positive optical power, its first side surface S10 is convex, and its second side surface S11 is concave. 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.

[0238] The optical lens may also include an aperture stop STO, which can be positioned between the third lens L3 and the fourth lens L4. This facilitates the effective focusing of light entering the optical system, and the forward positioning of the aperture stop helps to achieve a small f-number (FNO). For example, the aperture stop STO can be positioned between the third lens L3 and the fourth lens L4, near the first side surface S8 of the fourth lens L4.

[0239] In this embodiment, the first side surface S12 of the sixth lens L6 may have at least one inversion point, which helps to correct field curvature, aberrations, and reduce the principal ray angle, thereby improving the image acquisition sensitivity and achieving higher energy collection.

[0240] 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).

[0241] Table 15 shows the radius of curvature R, thickness CT / distance T, 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.

[0242]

[0243] Table 15

[0244] Face number k A4 A6 A8 A10 A12 S3 6.6541 1.9603E-03 -4.8624E-05 -9.3131E-08 3.4254E-08 -5.5126E-10 S4 -1.9733 3.4637E-03 3.7800E-06 -8.1823E-06 4.3534E-07 -6.8166E-09 S12 -1632.3963 -1.6610E-03 -4.4844E-05 -5.0593E-06 4.7910E-07 -4.6647E-09 S13 -0.8152 -4.9904E-04 3.0971E-06 1.8808E-06 -1.4886E-07 1.0792E-08

[0245] Table 16

[0246] In summary, Examples 1 to 8 satisfy the relationships shown in Tables 17-1 and 17-2 below. In Tables 17-1 and 17-2, the units of F, ENPD, TTL, H, BFL, D, SAG3, SAG4, SAG12, SAG13, F1, F2, F3, F4, F5, and F6 are all millimeters (mm), the unit of FOV is degrees (°), and the unit of θ is radians.

[0247]

[0248]

[0249] Table 17-1

[0250]

[0251]

[0252] Table 17-2

[0253] 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.

[0254] 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 negative 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, the first side of which is convex; and The sixth lens, which has positive optical power, has a convex second side surface; The optical lens has six lenses with optical power. The effective focal length F6 of the sixth lens and the total effective focal length F of the optical lens satisfy: 7.0981≥F6 / F≥3; The effective focal length F5 of the fifth lens and the effective focal length F6 of the sixth lens satisfy the following condition: 1.0856 ≥ F5 / F6 ≥ 0.6267.

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

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

4. The optical lens according to claim 1, characterized in that, The second side surface of the fifth lens is convex.

5. The optical lens according to claim 1, characterized in that, The second side surface of the fifth lens is concave.

6. The optical lens according to claim 1, characterized in that, The first side surface of the sixth lens is concave.

7. The optical lens according to claim 1, characterized in that, The first side surface of the sixth lens is convex.

8. The optical lens according to claim 1, characterized in that, The second lens has an aspherical mirror surface.

9. The optical lens according to claim 1, characterized in that, The sixth lens has an aspherical mirror surface.

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

11. The optical lens according to claim 1, characterized in that, The sixth lens has at least one inflection point.

12. The optical lens according to any one of claims 1-11, characterized in that, The total effective focal length F of the optical lens and the entrance pupil diameter ENPD of the optical lens satisfy the following condition: 1.2000≤F / ENPD≤1.

5.

13. The optical lens according to any one of claims 1-11, 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 satisfies the following condition: 9.4073≤TTL / F≤13.

14. The optical lens according to any one of claims 1-11, 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: 4.0764≤(TTL×180°) / (H×FOV)≤9.

15. The optical lens according to any one of claims 1-11, 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 on the optical axis satisfy: 0.1589≥BFL / TTL≥0.

08.

16. The optical lens according to any one of claims 1-11, 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: 2.6429≤(D×180°) / (H×FOV)≤9.

17. The optical lens according to any one of claims 1-11, 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: 52.7271 ≤ (FOV × F) / H ≤ 70°.

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

5.

19. The optical lens according to any one of claims 1-11, characterized in that, The sag SAG12 at the maximum aperture on the first side of the sixth lens and the sag SAG13 at the maximum aperture on the second side of the sixth lens satisfy the following condition: 0.5≤SAG12 / SAG13≤1.

5.

20. The optical lens according to any one of claims 1-11, 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: 4.2564≥R1 / R2≥2.

21. The optical lens according to any one of claims 1-11, characterized in that, The radius of curvature R5 of the first side of the third lens, the center thickness CT3 of the third lens on the optical axis, and the radius of curvature R6 of the second side of the third lens satisfy: 0.5≤(R5-CT3) / R6≤1.

5.

22. The optical lens according to any one of claims 1-11, 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: 0.8413≤D / H / θ≤1.

5.

23. The optical lens according to any one of claims 1-11, 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 light-transmitting aperture D of the first side of the first lens corresponding to the maximum field of view of the optical lens satisfy: 0.4555≥F×θ / D≥0.

2.

24. The optical lens according to any one of claims 1-11, characterized in that, 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: 0.1≤F / H≤1.

25. The optical lens according to any one of claims 1-11, 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: 0.7221≤D / H / F≤1.

3.

26. The optical lens according to any one of claims 1-11, characterized in that, The effective focal length F1 of the first lens and the total effective focal length F of the optical lens satisfy: -3.6907≤F1 / F≤-2.

27. The optical lens according to any one of claims 1-11, characterized in that, The effective focal length F2 of the second lens and the total effective focal length F of the optical lens satisfy: -5.7355≤F2 / F≤-3.

28. The optical lens according to any one of claims 1-11, characterized in that, The effective focal length F3 of the third lens and the total effective focal length F of the optical lens satisfy the following condition: F3 / F≤-5.

29. The optical lens according to any one of claims 1-11, 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: 7.0981≥F6 / F≥4.9737.

30. The optical lens according to any one of claims 1-11, characterized in that, The effective focal length F1 of the first lens and the effective focal length F2 of the second lens satisfy: 0.3≤F1 / F2≤1.

5.

31. The optical lens according to any one of claims 1-11, characterized in that, The effective focal length F4 of the fourth lens and the effective focal length F5 of the fifth lens satisfy the condition: 0.3≤F4 / F5≤1.

8.

32. The optical lens according to any one of claims 1-11, characterized in that, The center thickness CT1 of the first lens on the optical axis, the center thickness CT2 of the second lens on the optical axis, and the center thickness CT3 of the third lens on the optical axis satisfy the following condition: 0.3414≤CT1 / (CT2+CT3)≤0.

5.

33. The optical lens according to any one of claims 1-11, characterized in that, The total effective focal length F of the optical lens and the air gap T34 between the third lens and the fourth lens on the optical axis satisfy the following condition: 9.3803 ≥ F / T34 ≥ 2.

34. The optical lens according to any one of claims 1-11, characterized in that, The center thickness CT6 of the sixth lens on the optical axis, the center thickness CT4 of the fourth lens on the optical axis, and the center thickness CT5 of the fifth lens on the optical axis satisfy the following condition: 0.3345≥CT6 / (CT4+CT5)≥0.

2.

35. The optical lens according to any one of claims 1-11, characterized in that, The air gap distance T45 between the fourth lens and the fifth lens on the optical axis, the air gap distance T56 between the fifth lens and the sixth lens on the optical axis, the air gap distance T12 between the first lens and the second lens on the optical axis, and the air gap distance T23 between the second lens and the third lens on the optical axis satisfy the following condition: 0.3246≥(T45+T56) / (T12+T23)≥0.

2.

36. The optical lens according to any one of claims 1-11, characterized in that, The effective focal length F3 of the third lens and the effective focal length F6 of the sixth lens satisfy the condition: -39.0653≤F3 / F6≤-5.

37. 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 negative 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 distance TTL from the center of the first side of the first lens to the imaging plane of the optical lens on the optical axis and the total effective focal length F of the optical lens satisfy: 9.4073≤TTL / F≤13; The optical lens has six lenses with optical power. The effective focal length F6 of the sixth lens and the total effective focal length F of the optical lens satisfy: 7.0981≥F6 / F≥3; The effective focal length F5 of the fifth lens and the effective focal length F6 of the sixth lens satisfy the following condition: 1.0856 ≥ F5 / F6 ≥ 0.6267.

38. The optical lens according to claim 37, characterized in that, The first side of the first lens is convex, and the second side is concave.

39. The optical lens according to claim 37, characterized in that, The first side of the second lens is convex, and the second side is concave.

40. The optical lens according to claim 37, characterized in that, The first side of the third lens is concave, and the second side is convex.

41. The optical lens according to claim 37, characterized in that, The first side surface of the fourth lens is convex, and the second side surface is convex.

42. The optical lens according to claim 37, characterized in that, The first side of the fourth lens is convex, and the second side is concave.

43. The optical lens according to claim 37, characterized in that, The first side surface of the fifth lens is convex, and the second side surface is convex.

44. The optical lens according to claim 37, characterized in that, The first side of the fifth lens is convex, and the second side is concave.

45. The optical lens according to claim 37, characterized in that, The first side of the sixth lens is concave, and the second side is convex.

46. ​​The optical lens according to claim 37, characterized in that, The first side surface of the sixth lens is convex, and the second side surface is convex.

47. The optical lens according to claim 37, characterized in that, The second lens has an aspherical mirror surface.

48. The optical lens according to claim 37, characterized in that, The sixth lens has an aspherical mirror surface.

49. The optical lens according to claim 37, characterized in that, The optical lens also includes an aperture stop disposed between the third lens and the fourth lens.

50. The optical lens according to claim 37, characterized in that, The sixth lens has at least one inflection point.

51. The optical lens according to any one of claims 37-50, characterized in that, The total effective focal length F of the optical lens and the entrance pupil diameter ENPD of the optical lens satisfy the following condition: 1.2000≤F / ENPD≤1.

5.

52. The optical lens according to any one of claims 37-50, 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: 4.0764≤(TTL×180°) / (H×FOV)≤9.

53. The optical lens according to any one of claims 37-50, 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 on the optical axis satisfy: 0.1589≥BFL / TTL≥0.

08.

54. The optical lens according to any one of claims 37-50, 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: 2.6429≤(D×180°) / (H×FOV)≤9.

55. The optical lens according to any one of claims 37-50, 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: 52.7271 ≤ (FOV × F) / H ≤ 70°.

56. The optical lens according to any one of claims 37-50, characterized in that, The sag SAG3 at the maximum aperture on the first side of the second lens and the sag SAG4 at the maximum aperture on the second side of the second lens satisfy: 0.5≤SAG3 / SAG4≤1.

5.

57. The optical lens according to any one of claims 37-50, characterized in that, The sag SAG12 at the maximum aperture on the first side of the sixth lens and the sag SAG13 at the maximum aperture on the second side of the sixth lens satisfy the following condition: 0.5≤SAG12 / SAG13≤1.

5.

58. The optical lens according to any one of claims 37-50, 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: 4.2564≥R1 / R2≥2.

59. The optical lens according to any one of claims 37-50, characterized in that, The radius of curvature R5 of the first side of the third lens, the center thickness CT3 of the third lens on the optical axis, and the radius of curvature R6 of the second side of the third lens satisfy: 0.5≤(R5-CT3) / R6≤1.

5.

60. The optical lens according to any one of claims 37-50, 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: 0.8413≤D / H / θ≤1.

5.

61. The optical lens according to any one of claims 37-50, 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 light-transmitting aperture D of the first side of the first lens corresponding to the maximum field of view of the optical lens satisfy: 0.4555≥F×θ / D≥0.

2.

62. The optical lens according to any one of claims 37-50, characterized in that, 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: 0.1≤F / H≤1.

63. The optical lens according to any one of claims 37-50, 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: 0.7221≤D / H / F≤1.

3.

64. The optical lens according to any one of claims 37-50, characterized in that, The effective focal length F1 of the first lens and the total effective focal length F of the optical lens satisfy: -3.6907≤F1 / F≤-2.

65. The optical lens according to any one of claims 37-50, characterized in that, The effective focal length F2 of the second lens and the total effective focal length F of the optical lens satisfy: -5.7355≤F2 / F≤-3.

66. The optical lens according to any one of claims 37-50, characterized in that, The effective focal length F3 of the third lens and the total effective focal length F of the optical lens satisfy the following condition: F3 / F≤-5.

67. The optical lens according to any one of claims 37-50, 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: 7.0981≥F6 / F≥4.9737.

68. The optical lens according to any one of claims 37-50, characterized in that, The effective focal length F1 of the first lens and the effective focal length F2 of the second lens satisfy: 0.3≤F1 / F2≤1.

5.

69. The optical lens according to any one of claims 37-50, characterized in that, The effective focal length F4 of the fourth lens and the effective focal length F5 of the fifth lens satisfy the condition: 0.3≤F4 / F5≤1.

8.

70. The optical lens according to any one of claims 37-50, characterized in that, The center thickness CT1 of the first lens on the optical axis, the center thickness CT2 of the second lens on the optical axis, and the center thickness CT3 of the third lens on the optical axis satisfy the following condition: 0.3414≤CT1 / (CT2+CT3)≤0.

5.

71. The optical lens according to any one of claims 37-50, characterized in that, The total effective focal length F of the optical lens and the air gap T34 between the third lens and the fourth lens on the optical axis satisfy the following condition: 9.3803 ≥ F / T34 ≥ 2.

72. The optical lens according to any one of claims 37-50, characterized in that, The center thickness CT6 of the sixth lens on the optical axis, the center thickness CT4 of the fourth lens on the optical axis, and the center thickness CT5 of the fifth lens on the optical axis satisfy the following condition: 0.3345≥CT6 / (CT4+CT5)≥0.

2.

73. The optical lens according to any one of claims 37-50, characterized in that, The air gap distance T45 between the fourth lens and the fifth lens on the optical axis, the air gap distance T56 between the fifth lens and the sixth lens on the optical axis, the air gap distance T12 between the first lens and the second lens on the optical axis, and the air gap distance T23 between the second lens and the third lens on the optical axis satisfy the following condition: 0.3246≥(T45+T56) / (T12+T23)≥0.

2.

74. The optical lens according to any one of claims 37-50, characterized in that, The effective focal length F3 of the third lens and the effective focal length F6 of the sixth lens satisfy the condition: -39.0653≤F3 / F6≤-5.

75. An electronic device, characterized in that, It includes an optical lens according to any one of claims 1-74 and an imaging element for converting an optical image formed by the optical lens into an electrical signal.

Images