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 refractive power, the first side of which is a concave surface and the second side of which is a concave surface; a second lens with positive refractive power, the first side of which is a convex surface; a third lens with positive refractive power, the first side of which is a convex surface and the second side of which is a convex surface; a fourth lens with positive refractive power, the first side of which is a convex surface; a fifth lens with negative refractive power, the second side of which is a concave surface; a sixth lens with refractive power, the first side of which is a convex surface and the second side of which is a concave surface; and a seventh lens with negative refractive power, the second side of which is a concave surface.

Description

Technical Field

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

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

[0003] Thanks to the rapid development of automotive driver assistance systems in recent years, optical lenses are being used more and more widely in automobiles, leading to increasingly higher pixel requirements for automotive lenses. Simultaneously, with the continuous development of autonomous driving technology, more and more companies are beginning to research forward-looking lenses with good traffic light recognition capabilities. To accurately identify traffic light signals, these optical lenses need to have high chromatic aberration requirements. Furthermore, for safety reasons, forward-looking optical lenses must also have very high performance requirements. However, existing ordinary lenses have several problems in use: for example, reflections on the lens surface can create ghosting, easily inducing false alarm signals from the automotive chip, causing the driver assistance system to respond incorrectly and greatly affecting driving safety; moreover, the low relative illumination and uneven imaging of ordinary lenses result in lower light energy received by the chip's edge areas. In cloudy conditions, when the light energy is below the chip's trigger threshold, false alarms are likely to occur, threatening personal safety. Therefore, eliminating ghosting and improving the relative illumination of optical lenses are essential. Moreover, the operating environment and placement of forward-looking lenses require a balance between miniaturization and high resolution, two somewhat conflicting performance characteristics.

[0004] Therefore, the market currently needs an optical lens that combines high resolution with miniaturization, low cost, good chromatic aberration, and excellent performance to meet the requirements of automotive forward-looking applications. Summary of the Invention

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

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

[0007] In one embodiment, the second side surface of the second lens is a convex surface.

[0008] In one embodiment, the second side surface of the fourth lens is concave.

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

[0010] In one embodiment, the first side surface of the fifth lens is convex.

[0011] In one embodiment, the first side surface of the fifth lens is concave.

[0012] In one embodiment, the first side surface of the seventh lens is concave.

[0013] In one embodiment, the first side surface of the seventh lens is a convex surface.

[0014] In one embodiment, the second lens has an aspherical mirror surface.

[0015] In one embodiment, the seventh lens has an aspherical mirror surface.

[0016] In one embodiment, the fourth lens, the fifth lens, and the sixth lens are cemented together to form a cemented lens.

[0017] In one embodiment, the optical lens further includes an aperture stop disposed between the second lens and the third lens.

[0018] In one embodiment, the second side surface of the seventh lens has at least one inflection point.

[0019] 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 satisfies the following condition: TTL / F≤2.5.

[0020] In one embodiment, the Abbe number Vd3 of the third lens and the Abbe number Vd4 of the fourth lens satisfy: Vd3 + Vd4 ≥ 100.

[0021] In one embodiment, the sagitta SAG61 at the maximum aperture of the first side of the sixth lens, the maximum aperture D61 of the first side of the sixth lens, the sagitta SAG62 at the maximum aperture of the second side of the sixth lens, and the maximum aperture D62 of the second side of the sixth lens satisfy: 0.2≤(SAG61 / D61) / (SAG62 / D62)≤2.5.

[0022] In one embodiment, the effective focal length F4 of the fourth lens and the effective focal length F5 of the fifth lens satisfy: |F4 / F5|≤2.5.

[0023] In one embodiment, the center thickness d4 of the fourth lens on the optical axis, the center thickness d5 of the fifth lens on the optical axis, the center thickness d6 of the sixth lens on the optical axis, and the distance TTL from the center of the first side of the first lens to the imaging surface of the optical lens on the optical axis satisfy: 0.1≤(d4+d5+d6) / TTL≤0.8.

[0024] In one embodiment, the distance BFL from the center of the second side of the seventh lens to the imaging surface of the optical lens on the optical axis and the distance TTL from the center of the first side of the first lens to the imaging surface of the optical lens on the optical axis satisfy: BFL / TTL≥0.05.

[0025] In one embodiment, the radius of curvature R6 of the first side surface of the third lens and the radius of curvature R7 of the second side surface of the third lens satisfy: |R6 / R7|≤1.3.

[0026] 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 satisfy: (FOV×F) / H≥45.

[0027] In one embodiment, the total effective focal length F of the optical lens and the entrance pupil diameter EPD of the optical lens satisfy: 1≤F / EPD≤2.

[0028] 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 satisfy: D / H / θ≤5.

[0029] In one embodiment, the combined focal length F45 of the fourth lens and the fifth lens and the total effective focal length F of the optical lens satisfy: |F45 / F|≤12.

[0030] In one embodiment, the combined focal length F456 of the fourth lens, the fifth lens, and the sixth lens satisfies the condition that |F456 / F|≥2.

[0031] In one embodiment, the distance Ti10 from the center of the first 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 of the optical lens on the optical axis satisfy: 0.2≤Ti10 / TTL≤0.6.

[0032] In one embodiment, the center thickness d7 of the seventh lens on the optical axis and the distance TTL from the center of the first side of the first lens to the imaging surface of the optical lens on the optical axis satisfy: 0.05≤d7 / TTL≤0.2.

[0033] In one embodiment, the distance d46 between the center of the second side of the fourth lens and the center of the first side of the sixth lens on the optical axis and the distance TTL between the center of the first side of the first lens and the imaging surface of the optical lens on the optical axis satisfy: d46 / TTL≤0.05.

[0034] In one embodiment, the radian value θ1 of the angle between the incident ray at the center of the field of view of the optical lens and the optical axis before it reaches the sixth lens and the radian value θ2 of the angle between the outgoing ray at the center of the field of view of the optical lens and the optical axis after it reaches the sixth lens satisfy: θ2 / θ1≤2.

[0035] In one embodiment, the effective focal length F6 of the sixth lens and the total effective focal length F of the optical lens satisfy: 2.1≤|F6 / F|≤10.

[0036] In one embodiment, the refractive index N4 of the fourth lens, the refractive index N5 of the fifth lens, and the refractive index N6 of the sixth lens satisfy: 1≤(N6-N4) / (N5-N4)≤2.

[0037] In one embodiment, the center thickness d4 of the fourth lens on the optical axis, the center thickness d5 of the fifth lens on the optical axis, the center thickness d6 of the sixth lens on the optical axis, and the distance T on the optical axis from the center of the first side of the fourth lens to the center of the second side of the sixth lens satisfy: T≤0.03+d4+d5+d6.

[0038] In another aspect, this application provides an optical lens comprising, along the optical axis from a first side to a second side, the following: a first lens having negative optical power; a second lens having positive optical power; a third lens having positive optical power; a fourth lens having positive optical power; a fifth lens having negative optical power; a sixth lens having optical power; and a seventh lens having negative optical power, wherein the fourth lens, the fifth lens, and the sixth lens are cemented together to form a cemented lens.

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

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

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

[0042] In one embodiment, the first side surface of the third lens is convex, and the second side surface is convex.

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

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

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

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

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

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

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

[0050] In one embodiment, the second lens has an aspherical mirror surface.

[0051] In one embodiment, the seventh lens has an aspherical mirror surface.

[0052] In one embodiment, the optical lens further includes an aperture stop disposed between the second lens and the third lens.

[0053] In one embodiment, the second side surface of the seventh lens has at least one inflection point.

[0054] 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 satisfies the following condition: TTL / F≤2.5.

[0055] In one embodiment, the Abbe number Vd3 of the third lens and the Abbe number Vd4 of the fourth lens satisfy: Vd3 + Vd4 ≥ 100.

[0056] In one embodiment, the sagitta SAG61 at the maximum aperture of the first side of the sixth lens, the maximum aperture D61 of the first side of the sixth lens, the sagitta SAG62 at the maximum aperture of the second side of the sixth lens, and the maximum aperture D62 of the second side of the sixth lens satisfy: 0.2≤(SAG61 / D61) / (SAG62 / D62)≤2.5.

[0057] In one embodiment, the effective focal length F4 of the fourth lens and the effective focal length F5 of the fifth lens satisfy: |F4 / F5|≤2.5.

[0058] In one embodiment, the center thickness d4 of the fourth lens on the optical axis, the center thickness d5 of the fifth lens on the optical axis, the center thickness d6 of the sixth lens on the optical axis, and the distance TTL from the center of the first side of the first lens to the imaging surface of the optical lens on the optical axis satisfy: 0.1≤(d4+d5+d6) / TTL≤0.8.

[0059] In one embodiment, the distance BFL from the center of the second side of the seventh lens to the imaging surface of the optical lens on the optical axis and the distance TTL from the center of the first side of the first lens to the imaging surface of the optical lens on the optical axis satisfy: BFL / TTL≥0.05.

[0060] In one embodiment, the radius of curvature R6 of the first side surface of the third lens and the radius of curvature R7 of the second side surface of the third lens satisfy: |R6 / R7|≤1.3.

[0061] 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 satisfy: (FOV×F) / H≥45.

[0062] In one embodiment, the total effective focal length F of the optical lens and the entrance pupil diameter EPD of the optical lens satisfy: 1≤F / EPD≤2.

[0063] 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 satisfy: D / H / θ≤5.

[0064] In one embodiment, the combined focal length F45 of the fourth lens and the fifth lens and the total effective focal length F of the optical lens satisfy: |F45 / F|≤12.

[0065] In one embodiment, the combined focal length F456 of the fourth lens, the fifth lens, and the sixth lens satisfies the condition that |F456 / F|≥2.

[0066] In one embodiment, the distance Ti10 from the center of the first 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 of the optical lens on the optical axis satisfy: 0.2≤Ti10 / TTL≤0.6.

[0067] In one embodiment, the center thickness d7 of the seventh lens on the optical axis and the distance TTL from the center of the first side of the first lens to the imaging surface of the optical lens on the optical axis satisfy: 0.05≤d7 / TTL≤0.2.

[0068] In one embodiment, the distance d46 between the center of the second side of the fourth lens and the center of the first side of the sixth lens on the optical axis and the distance TTL between the center of the first side of the first lens and the imaging surface of the optical lens on the optical axis satisfy: d46 / TTL≤0.05.

[0069] In one embodiment, the radian value θ1 of the angle between the incident ray at the center of the field of view of the optical lens and the optical axis before it reaches the sixth lens and the radian value θ2 of the angle between the outgoing ray at the center of the field of view of the optical lens and the optical axis after it reaches the sixth lens satisfy: θ2 / θ1≤2.

[0070] In one embodiment, the effective focal length F6 of the sixth lens and the total effective focal length F of the optical lens satisfy: 2.1≤|F6 / F|≤10.

[0071] In one embodiment, the refractive index N4 of the fourth lens, the refractive index N5 of the fifth lens, and the refractive index N6 of the sixth lens satisfy: 1≤(N6-N4) / (N5-N4)≤2.

[0072] In one embodiment, the center thickness d4 of the fourth lens on the optical axis, the center thickness d5 of the fifth lens on the optical axis, the center thickness d6 of the sixth lens on the optical axis, and the distance T on the optical axis from the center of the first side of the fourth lens to the center of the second side of the sixth lens satisfy: T≤0.03+d4+d5+d6.

[0073] 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.

[0074] This application employs seven lenses. By optimizing the shape and optical power of each lens, the optical lens achieves at least one beneficial effect, such as high resolution, miniaturization, high illumination, low cost, good chromatic aberration, excellent temperature performance, long back focal length, and good image quality. This enables the optical lens to better meet the requirements of automotive front-view applications. Attached Figure Description

[0075] 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:

[0076] Figure 1 This is a schematic diagram illustrating the structure of an optical lens according to Embodiment 1 of this application;

[0077] Figure 2 To illustrate the structure of the optical lens according to Embodiment 2 of this application;

[0078] Figure 3 To illustrate the structure of the optical lens according to Embodiment 3 of this application;

[0079] Figure 4 This is a schematic diagram illustrating the structure of the optical lens according to Embodiment 4 of this application;

[0080] Figure 5 This is a schematic diagram illustrating the structure of the optical lens according to Embodiment 5 of this application;

[0081] Figure 6 To illustrate the structure of the optical lens according to Embodiment 6 of this application;

[0082] Figure 7 This is a schematic diagram illustrating the structure of the optical lens according to Embodiment 7 of this application;

[0083] Figure 8 To illustrate the structure of the optical lens according to Embodiment 8 of this application;

[0084] Figure 9 This is a schematic diagram illustrating the structure of the optical lens according to Embodiment 9 of this application;

[0085] Figure 10 To illustrate the structural schematic diagram of the optical lens according to Embodiment 10 of this application;

[0086] Figure 11 To illustrate the structural schematic diagram of the optical lens according to Embodiment 11 of this application;

[0087] Figure 12 To illustrate the structural schematic diagram of the optical lens according to Embodiment 12 of this application; and

[0088] Figure 13 This is a schematic diagram illustrating the radian value θ1 of the angle between the incident ray and the optical axis before it reaches the sixth lens, and the radian value θ2 of the angle between the outgoing ray and the optical axis after it reaches the sixth lens, according to an embodiment of this application. Detailed Implementation

[0089] 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.

[0090] 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.

[0091] 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.

[0092] 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.

[0093] 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.

[0094] 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.

[0095] 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.

[0096] 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.

[0097] The features, principles and other aspects of this application are described in detail below.

[0098] In an exemplary embodiment, the optical lens includes, for example, seven lenses with optical power, namely a first lens, a second lens, a third lens, a fourth lens, a fifth lens, a sixth lens, and a seventh lens. These seven lenses are arranged sequentially along the optical axis from the first side to the second side.

[0099] 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).

[0100] In an exemplary embodiment, the first lens may have negative optical power. The first lens may have a concave-convex shape. This facilitates the correct and smooth entry of light into the rear optical system, improves resolution, and helps to collect as much light as possible from a wide field of view into the rear optical system, increasing light transmission and contributing to improved relative illumination. The first lens may be a spherical lens, which allows for the addition of a waterproof coating while reducing processing costs.

[0101] In an exemplary embodiment, the second lens may have positive optical power, which is beneficial for light convergence. The second lens may have a convex-concave surface, which is beneficial for lens manufacturability, helps reduce the aperture and length of the optical lens barrel, and facilitates the miniaturization of the optical lens. Alternatively, the second lens may have a convex-convex surface, which helps to smooth peripheral light, while also helping to reduce the aperture and length of the optical lens barrel, thus facilitating the miniaturization of the optical lens. Preferably, the second lens may have an aspherical mirror surface, which can effectively correct aberrations, further improve resolution, and make the illumination of the image plane more uniform.

[0102] In an exemplary embodiment, the third lens may have positive optical power. The third lens may have a convex-convex surface. This configuration of optical power and surface of the third lens is beneficial for light convergence and helps to reduce the aperture and length of the optical lens barrel, thus facilitating the miniaturization of the optical lens.

[0103] In an exemplary embodiment, the fourth lens may have positive optical power. The fourth lens may have a convex-concave or convex-convex surface. This configuration of optical power and surface shape of the fourth lens results in a larger dispersion coefficient, which is beneficial for correcting system dispersion and balancing system aberrations. The convex-concave shape facilitates fabrication, and the convex surface of the first lens makes it easier to converge light, thus reducing the aperture.

[0104] In an exemplary embodiment, the fifth lens may have negative optical power. The fifth lens may have a convex-concave or concave-concave surface. The fifth lens may be made of a material with a high refractive index, which can make the structure more compact. In addition, convex-concave lenses are easier to process, and lenses with a convex first surface are easier to converge light, thus reducing the aperture.

[0105] In an exemplary embodiment, the sixth lens may have positive or negative optical power. The sixth lens may have a convex-concave surface. The similar radii of curvature on both sides of the sixth lens facilitates smooth light propagation and helps reduce the sensitivity of the system.

[0106] In an exemplary embodiment, the seventh lens may have negative optical power. The seventh lens may have a concave-concave or convex-concave surface. This optical power and surface configuration of the seventh lens can balance system aberrations, facilitate smoothing the path of incoming light, improve image resolution, and the convex-concave surface facilitates fabrication. Preferably, the seventh lens may have an aspherical surface, which can effectively correct aberrations, further improve resolution, and make the illumination of the image plane more uniform.

[0107] In an exemplary embodiment, the fourth, fifth, and sixth lenses can be cemented together to form a cemented lens, thereby sharing the overall chromatic aberration correction of the system, effectively correcting aberrations to improve resolution, and making the overall optical system compact, which is beneficial for meeting miniaturization requirements. In addition, cementing can reduce the impact of individual component tolerances and improve overall performance. At the same time, cementing can eliminate the air cavity between the fifth and sixth lenses, avoiding light reflection back and forth within the air cavity, which can effectively reduce the risk of ghosting.

[0108] In an exemplary embodiment, the optical lens may further include an aperture stop disposed between the second lens and the third lens. Positioning the aperture stop after the second lens helps increase the emitted light, thus ensuring sufficient light transmission. In this embodiment, the aperture stop may be located near the second side surface of the second lens, near the first side surface of the third lens, or near the midpoint between the second and third lenses. However, it should be noted that the positions of the aperture stop disclosed herein are merely examples and not limitations; in alternative embodiments, the aperture stop may be positioned at other locations as needed.

[0109] In an exemplary embodiment, the second side surface of the seventh lens may have at least one inflection point, which is beneficial for correcting system aberrations and improving the system's resolving power.

[0110] In an exemplary embodiment, the optical lens according to this application satisfies the following condition: TTL / F ≤ 2.5, where TTL is the total optical length of the optical lens, i.e., 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 ≤ 2.2. Satisfying TTL / F ≤ 2.5 is beneficial for limiting the lens size and achieving lens miniaturization.

[0111] In an exemplary embodiment, the optical lens according to this application satisfies: Vd3 + Vd4 ≥ 100, where Vd3 is the Abbe number of the third lens and Vd4 is the Abbe number of the fourth lens. More specifically, Vd3 and Vd4 may further satisfy: Vd3 + Vd4 ≥ 120. Satisfying Vd3 + Vd4 ≥ 100 can help to further limit the lens's ability to deflect light emitted from a point, thereby correcting chromatic aberration in the imaging lens and making the image after passing through the imaging lens more realistic.

[0112] In an exemplary embodiment, the optical lens according to this application satisfies: 0.2 ≤ (SAG61 / D61) / (SAG62 / D62) ≤ 2.5, where SAG61 is the sag at the maximum aperture of the first side of the sixth lens, D61 is the maximum total aperture of the first side of the sixth lens, SAG62 is the sag at the maximum aperture of the second side of the sixth lens, and D62 is the maximum total aperture of the second side of the sixth lens. More specifically, SAG61, D61, SAG62, and D62 further satisfy: 0.5 ≤ (SAG61 / D61) / (SAG62 / D62) ≤ 2. Satisfying 0.2 ≤ (SAG61 / D61) / (SAG62 / D62) ≤ 2.5, the shapes of the first and second sides of the sixth lens are similar, which facilitates a smooth transition of peripheral light and helps reduce lens sensitivity.

[0113] In an exemplary embodiment, the optical lens according to this application satisfies: |F4 / F5|≤2.5, 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 further satisfy: |F4 / F5|≤2. Satisfying |F4 / F5|≤2.5 means that the focal lengths of the fourth and fifth lenses in the cemented joint are similar, which helps to smooth the light transition, is beneficial for correcting chromatic aberration, improves image quality, and can effectively improve the lens's thermal compensation.

[0114] In an exemplary embodiment, the optical lens according to this application satisfies: 0.1 ≤ (d4 + d5 + d6) / TTL ≤ 0.8, where d4 is the center thickness of the fourth lens on the optical axis, d5 is the center thickness of the fifth lens on the optical axis, d6 is the center thickness of the sixth lens on the optical axis, 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, d4, d5, d6, and TTL can further satisfy: 0.2 ≤ (d4 + d5 + d6) / TTL ≤ 0.4. Satisfying 0.1 ≤ (d4 + d5 + d6) / TTL ≤ 0.8, the reasonable focal length setting of the cemented lens helps more light to enter smoothly, which is beneficial to improving illumination.

[0115] In an exemplary embodiment, the optical lens according to this application satisfies the following condition: BFL / TTL ≥ 0.05, where BFL is the distance on the optical axis from the center of the second side surface of the seventh lens to the imaging plane of the optical lens, and TTL is the distance on the optical axis from the center of the first side surface of the first lens to the imaging plane of the optical lens. More specifically, BFL and TTL may further satisfy: BFL / TTL ≥ 0.1. Satisfying BFL / TTL ≥ 0.05 allows the optical lens to have a long back focal length, which is beneficial for assembly.

[0116] In an exemplary embodiment, the optical lens according to this application satisfies: |R6 / R7|≤1.3, where R6 is the radius of curvature of the first side surface of the third lens, and R7 is the radius of curvature of the second side surface of the third lens. More specifically, R6 and R7 may further satisfy: |R6 / R7|≤1.2. Satisfying |R6 / R7|≤1.3 ensures lens symmetry, which is beneficial for correcting spherical aberration, improving image quality, and facilitating assembly.

[0117] In an exemplary embodiment, the optical lens according to this application satisfies: (FOV×F) / H≥45, where FOV is the maximum field of view of the optical lens, F is the total effective focal length of the optical lens, and H is the image height corresponding to the maximum field of view of the optical lens. More specifically, FOV, F, and H can further satisfy: (FOV×F) / H≥50. Satisfying (FOV×F) / H≥45 is beneficial for achieving low distortion and for simultaneously satisfying both telephoto and large field of view requirements.

[0118] In an exemplary embodiment, the optical lens according to this application satisfies: 1 ≤ F / EPD ≤ 2, where F is the total effective focal length of the optical lens and EPD is the entrance pupil diameter of the optical lens. More specifically, F and EPD may further satisfy: 1.5 ≤ F / EPD ≤ 1.8. Satisfying 1 ≤ F / EPD ≤ 2 results in a large entrance pupil diameter, which helps to improve relative illumination.

[0119] In an exemplary embodiment, the optical lens according to this application satisfies: D / H / θ≤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≤3. Satisfying D / H / θ≤5 allows for a small front aperture of the lens, which is beneficial for lens miniaturization.

[0120] In an exemplary embodiment, the optical lens according to this application satisfies: |F45 / F|≤12, where F45 is the combined focal length of the fourth and fifth lenses, and F is the total effective focal length of the optical lens. More specifically, F45 and F further satisfy: |F45 / F|≤10. Satisfying |F45 / F|≤12, the first two lenses of the cemented part, namely the fourth and fifth lenses, converge light, making the structure more compact and the subsequent light path smoother, which is beneficial to the miniaturization and high resolution of the lens.

[0121] In an exemplary embodiment, the optical lens according to this application satisfies: |F456 / F|≥2, where F456 is the combined focal length of the fourth, fifth, and sixth lenses, and F is the total effective focal length of the optical lens. More specifically, F456 and F further satisfy: |F456 / F|≥2.5. Satisfying |F456 / F|≥2, and with a reasonable focal length setting for the cemented lens, helps more light to enter smoothly, thus improving illumination.

[0122] In an exemplary embodiment, the optical lens according to this application satisfies: 0.2 ≤ Ti10 / TTL ≤ 0.6, where Ti10 is the distance on the optical axis from the center of the first side surface of the sixth lens to the imaging plane of the optical lens, and TTL is the distance on the optical axis from the center of the first side surface of the first lens to the imaging plane of the optical lens. More specifically, Ti10 and TTL may further satisfy: 0.3 ≤ Ti10 / TTL ≤ 0.5. Satisfying 0.2 ≤ Ti10 / TTL ≤ 0.6 allows the sixth lens to be farther from the image plane, which can help eliminate ghosting.

[0123] In an exemplary embodiment, the optical lens according to this application satisfies: 0.05 ≤ d7 / TTL ≤ 0.2, where d7 is the center thickness of the seventh lens on the optical axis, 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, d7 and TTL can further satisfy: 0.07 ≤ d7 / TTL ≤ 0.15. Satisfying 0.05 ≤ d7 / TTL ≤ 0.2, the thicker last lens (i.e., the seventh lens) can make the light deflection smoother, which is beneficial to improving relative illumination. At the same time, it can share the bending pressure of the third lens, alleviate the sensitivity and weight of the third lens, and also balance aberrations and improve resolution.

[0124] In an exemplary embodiment, the optical lens according to this application satisfies the following condition: d46 / TTL ≤ 0.05, where d46 is the distance on the optical axis between the center of the second side surface of the fourth lens and the center of the first side surface of the sixth lens, and TTL is the distance on the optical axis between the center of the first side surface of the first lens and the imaging plane of the optical lens. More specifically, d46 and TTL can further satisfy: d46 / TTL ≤ 0.04. Satisfying d46 / TTL ≤ 0.05 shortens the distance between the fourth and sixth lenses, which helps to reduce ghosting problems caused by the similar curvature of the two surfaces, while also reducing air gap and lens size.

[0125] In an exemplary embodiment, the optical lens according to this application can satisfy: θ2 / θ1≤2, where θ1 is the radian value of the angle between the incident ray at the center of the peripheral field of view of the optical lens and the optical axis before it reaches the sixth lens, and θ2 is the radian value of the angle between the outgoing ray at the center of the peripheral field of view of the optical lens and the optical axis after it reaches the sixth lens. Figure 13 As shown, Figure 13 A1 indicates the principal ray at the center of the field of view at the edge of the optical lens. More specifically, θ1 and θ2 can further satisfy: θ2 / θ1≤1.5. Satisfying θ2 / θ1≤2 makes the light path smoother, which is beneficial for a smooth light transition, reduces lens sensitivity, and improves illumination.

[0126] In an exemplary embodiment, the optical lens according to this application satisfies: 2.1 ≤ |F6 / F| ≤ 10, 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 further satisfy: 2.1 ≤ |F6 / F| ≤ 8. Satisfying 2.1 ≤ |F6 / F| ≤ 10, the reasonable focal length distribution in the cemented part can reduce light energy loss, which is beneficial to improving illumination, while correcting aberrations and improving resolution.

[0127] In an exemplary embodiment, the optical lens according to this application satisfies: 1 ≤ (N6-N4) / (N5-N4) ≤ 2, where N4 is the refractive index of the fourth lens, N5 is the refractive index of the fifth lens, and N6 is the refractive index of the sixth lens. More specifically, N4, N5, and N6 further satisfy: 1 ​​≤ (N6-N4) / (N5-N4) ≤ 1.8. Satisfying 1 ≤ (N6-N4) / (N5-N4) ≤ 2, the refractive indices of the fourth, fifth, and sixth lenses are similar, which can smooth the light path, reduce the refractive index sensitivity of the lens, and at the same time help to balance aberrations and improve resolution.

[0128] In an exemplary embodiment, the optical lens according to this application satisfies: T ≤ 0.03 + d4 + d5 + d6, where d4 is the center thickness of the fourth lens on the optical axis, d5 is the center thickness of the fifth lens on the optical axis, d6 is the center thickness of the sixth lens on the optical axis, and T is the distance on the optical axis from the center of the first side of the fourth lens to the center of the second side of the sixth lens. More specifically, d4, d5, d6, and T further satisfy: T ≤ 0.02 + d4 + d5 + d6.

[0129] In an exemplary embodiment, the optical lens of this application may, as needed, include a filter and / or protective glass disposed between the seventh lens and the imaging surface to filter light of different wavelengths and prevent damage to the second-side components (e.g., chips) of the optical lens.

[0130] In an exemplary embodiment, the first lens may be a spherical lens; the second lens may be an aspherical lens; the third, fourth, fifth, and sixth lenses may be spherical lenses; and the seventh lens may be an aspherical lens. This application does not specifically limit the number of spherical and aspherical lenses; the number of aspherical lenses can be increased when resolving quality is a primary concern. Specifically, to improve the resolving quality of the optical system, the first, second, third, fourth, fifth, sixth, and seventh lenses may all be aspherical lenses. Aspherical lenses are characterized by a continuously changing curvature from the lens center to the periphery. Unlike spherical lenses, which have a constant curvature from the lens center to the periphery, aspherical lenses have better radius of curvature characteristics, offering advantages in improving distortion aberrations and astigmatism. Using aspherical lenses can eliminate aberrations that occur during imaging as much as possible, thereby improving the lens's imaging quality. The use of aspherical lenses helps correct system aberrations and improve resolving power.

[0131] In an exemplary embodiment, the first lens, second lens, third lens, fourth lens, fifth lens, sixth lens, and seventh 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 seventh lenses can all be aspherical glass lenses. In applications with lower temperature stability requirements, the first to seventh 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 seventh lenses in the optical lens can also be made of a combination of plastic and glass.

[0132] The optical lens according to the above embodiments of this application achieves at least one beneficial effect, such as high resolution, miniaturization, low cost, good chromatic aberration, long back focal length, and good image quality, through the reasonable setting of the shape and power of each lens, thus enabling the optical lens to better meet the requirements of automotive front-view applications. Specifically, the optical lens according to the above embodiments of this application eliminates the additional ghosting caused by reflections from the lens surface by using a cemented triplet lens, ensuring the accuracy of the signal received by the automotive chip, and the cemented triplet lens form easily reduces the sensitivity of the fit. In addition, by setting a suitable aperture position, selecting a large entrance pupil diameter, and reasonably matching the lens materials and power, it is possible to achieve good matching with the automotive chip, resulting in uniform imaging, high relative illumination, and no color cast or vignetting. Furthermore, by using aspherical lenses and reasonable power settings, the optical system achieves both miniaturization and high resolution requirements with only seven lenses. The reasonable distribution of the system's power also enables minimal changes in imaging effect at high and low temperatures, stable image quality, and suitability for most environments in vehicles. Moreover, lower tolerance sensitivity can reduce the difficulty of processing and assembly, and reduce lens costs.

[0133] However, those skilled in the art will understand that the number of lenses constituting the lens can be varied to obtain the various results and advantages described in this specification without departing from the technical solutions claimed in this application. For example, although seven lenses are described as an example in the embodiments, the optical lens is not limited to including seven 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.

[0134] Example 1

[0135] 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.

[0136] like Figure 1 As shown, the optical lens includes, in sequence from the first side to the second side along the optical axis, a first lens L1, a second lens L2, a third lens L3, a fourth lens L4, a fifth lens L5, a sixth lens L6, and a seventh lens L7.

[0137] The first lens L1 is a concave-concave lens with negative optical power, its first side surface S1 is concave, and its second side surface S2 is concave. The second lens L2 is a convex-concave lens with positive optical power, its first side surface S3 is convex, and its second side surface S4 is concave. The third lens L3 is a convex-convex lens with positive optical power, its first side surface S6 is convex, and its second side surface S7 is convex. The fourth lens L4 is a convex-concave lens with positive optical power, its first side surface S8 is convex, and its second side surface S9 is concave. The fifth lens L5 is a convex-concave lens with negative optical power, its first side surface S9 is convex, and its second side surface S10 is concave. The sixth lens L6 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 seventh lens L7 is a concave-concave lens with negative optical power, its first side surface S12 is concave, and its second side surface S13 is concave.

[0138] The optical lens may also include an aperture stop STO, which can be positioned between the second lens L2 and the third lens L3 to increase the outgoing light and ensure sufficient light transmission. For example, the aperture stop STO can be positioned between the second lens L2 and the third lens L3, near the second side surface S4 of the second lens L2.

[0139] Optionally, the optical lens may further include a filter L8 having a first side surface S14 and a second side surface S15, which can be used to correct color deviation. Optionally, the optical lens may further include a protective glass L9 having a first side surface S16 and a second side surface S17, which can be used to protect the image sensor chip IMA located on the imaging surface and / or the image source surface. When the optical lens is used for imaging, light from the object passes sequentially through each surface S1 to S17 and is finally imaged on the imaging surface; when the optical lens is used for projection, light from the image source surface passes sequentially through each surface S17 to S1 and is finally projected onto the target object (not shown).

[0140] Table 1 shows the radius of curvature R, thickness / distance d (it should be understood that the thickness / distance d in the row where S1 is located is the center thickness d1 of the first lens L1, the thickness / distance d in the row where S2 is located is the spacing distance d2 between the first lens L1 and the second lens L2, and so on), refractive index N, and Abbe number Vd of each lens of the optical lens of Embodiment 1.

[0141]

[0142] Table 1

[0143] 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 seventh lens L7 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:

[0144]

[0145] Where x is the distance vector from the vertex of the aspherical surface at a height h along the optical axis; c is the paraxial curvature of the aspherical surface, c = 1 / R (i.e., the paraxial curvature c is the reciprocal of the radius of curvature R in Table 1 above); k is the conic coefficient; Ai is the i-th order correction coefficient of the aspherical surface. Table 2 below gives the conic coefficient k and higher-order coefficients A4, A6, A8, A10, A12, A14 and A16 that can be used for the aspherical mirrors S3, S4, S12 and S13 in Example 1.

[0146] Face number k A4 A6 A8 A10 A12 A14 A16 S3 -1.9883 -7.8123E-05 -4.2778E-06 -1.7038E-10 1.8096E-09 -8.7209E-12 -2.8868E-12 5.7061E-14 S4 -126.1065 5.1660E-05 -4.4125E-06 5.7603E-08 -1.4782E-09 9.8617E-11 -2.6412E-12 2.0821E-14 S12 111.7484 -2.1236E-03 4.6351E-06 -2.6601E-06 1.7262E-07 2.3326E-09 -4.2426E-10 7.1339E-12 S13 0.4386 -1.1904E-03 -9.9344E-06 4.8754E-06 -4.7095E-07 2.4134E-08 -5.2654E-10 2.7616E-12

[0147] Table 2

[0148] Example 2

[0149] 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.

[0150] like Figure 2 As shown, the optical lens includes, in sequence from the first side to the second side along the optical axis, a first lens L1, a second lens L2, a third lens L3, a fourth lens L4, a fifth lens L5, a sixth lens L6, and a seventh lens L7.

[0151] The first lens L1 is a concave-concave lens with negative optical power, its first side surface S1 is concave, and its second side surface S2 is concave. The second lens L2 is a convex-concave lens with positive optical power, its first side surface S3 is convex, and its second side surface S4 is concave. The third lens L3 is a convex-convex lens with positive optical power, its first side surface S6 is convex, and its second side surface S7 is convex. The fourth lens L4 is a convex-concave lens with positive optical power, its first side surface S8 is convex, and its second side surface S9 is concave. The fifth lens L5 is a convex-concave lens with negative optical power, its first side surface S9 is convex, and its second side surface S10 is concave. The sixth lens L6 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 seventh lens L7 is a concave-concave lens with negative optical power, its first side surface S12 is concave, and its second side surface S13 is concave.

[0152] The optical lens may also include an aperture stop STO, which can be positioned between the second lens L2 and the third lens L3 to increase the outgoing light and ensure sufficient light transmission. For example, the aperture stop STO can be positioned between the second lens L2 and the third lens L3, near the second side surface S4 of the second lens L2.

[0153] Optionally, the optical lens may further include a filter L8 having a first side surface S14 and a second side surface S15, which can be used to correct color deviation. Optionally, the optical lens may further include a protective glass L9 having a first side surface S16 and a second side surface S17, which can be used to protect the image sensor chip IMA located on the imaging surface and / or the image source surface. When the optical lens is used for imaging, light from the object passes sequentially through each surface S1 to S17 and is finally imaged on the imaging surface; when the optical lens is used for projection, light from the image source surface passes sequentially through each surface S17 to S1 and is finally projected onto the target object (not shown).

[0154] Table 3 shows the radius of curvature R, thickness / distance d, refractive index N, and Abbe number Vd of each lens in the optical lens of Example 2. Table 4 shows the conic coefficients and higher-order coefficients that can be used for each aspherical mirror in Example 2, wherein each aspherical surface shape can be defined by formula (1) given in Example 1 above.

[0155]

[0156] Table 3

[0157] Face number k A4 A6 A8 A10 A12 A14 A16 S3 -2.1907 -8.0339E-05 -4.2526E-06 1.1678E-09 1.8612E-09 -7.1812E-12 -2.7891E-12 6.1277E-14 S4 -114.2484 5.3348E-05 -4.3750E-06 5.9617E-08 -1.3891E-09 1.0210E-10 -2.5134E-12 2.5355E-14 S12 111.7484 -1.9511E-03 1.1417E-05 -2.7185E-06 1.4740E-07 9.2394E-10 -4.5250E-10 1.1557E-11 S13 3.8345 -1.1148E-03 -9.1450E-06 4.8271E-06 -4.7667E-07 2.3900E-08 -5.2999E-10 2.9502E-12

[0158] Table 4

[0159] Example 3

[0160] 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.

[0161] like Figure 3 As shown, the optical lens includes, in sequence from the first side to the second side along the optical axis, a first lens L1, a second lens L2, a third lens L3, a fourth lens L4, a fifth lens L5, a sixth lens L6, and a seventh lens L7.

[0162] The first lens L1 is a concave-concave lens with negative optical power, its first side surface S1 is concave, and its second side surface S2 is concave. The second lens L2 is a convex-concave lens with positive optical power, its first side surface S3 is convex, and its second side surface S4 is concave. The third lens L3 is a convex-convex lens with positive optical power, its first side surface S6 is convex, and its second side surface S7 is convex. The fourth lens L4 is a convex-convex lens with positive optical power, its first side surface S8 is convex, and its second side surface S9 is convex. The fifth lens L5 is a concave-concave lens with negative optical power, its first side surface S9 is concave, and its second side surface S10 is concave. The sixth lens L6 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 seventh lens L7 is a convex-concave lens with negative optical power, its first side surface S12 is convex, and its second side surface S13 is concave.

[0163] The optical lens may also include an aperture stop STO, which can be positioned between the second lens L2 and the third lens L3 to increase the outgoing light and ensure sufficient light transmission. For example, the aperture stop STO can be positioned between the second lens L2 and the third lens L3, near the second side surface S4 of the second lens L2.

[0164] Optionally, the optical lens may further include a filter L8 having a first side surface S14 and a second side surface S15, which can be used to correct color deviation. Optionally, the optical lens may further include a protective glass L9 having a first side surface S16 and a second side surface S17, which can be used to protect the image sensor chip IMA located on the imaging surface and / or the image source surface. When the optical lens is used for imaging, light from the object passes sequentially through each surface S1 to S17 and is finally imaged on the imaging surface; when the optical lens is used for projection, light from the image source surface passes sequentially through each surface S17 to S1 and is finally projected onto the target object (not shown).

[0165] Table 5 shows the radius of curvature R, thickness / distance d, refractive index N, and Abbe number Vd of each lens in the optical lens of Example 3. Table 6 shows the conic coefficients and higher-order coefficients that can be used for each aspherical mirror in Example 3, wherein each aspherical surface shape can be defined by formula (1) given in Example 1 above.

[0166]

[0167] Table 5

[0168] Face number k A4 A6 A8 A10 A12 A14 A16 S3 -1.2503 -5.2305E-05 -3.6383E-06 1.0506E-08 1.1058E-09 -1.7647E-11 -1.8172E-12 4.2628E-14 S4 -19.4584 6.0849E-05 -5.0579E-06 1.0785E-07 -1.1556E-09 2.8820E-11 -5.5564E-12 9.5713E-14 S12 111.7484 -1.7463E-03 -2.3651E-06 -4.7823E-06 1.9787E-07 4.8069E-09 -9.0659E-10 2.0359E-11 S13 8.7661 -8.1164E-04 -5.0789E-05 6.4219E-06 -5.2170E-07 2.2554E-08 -4.0630E-10 1.2723E-12

[0169] Table 6

[0170] Example 4

[0171] The following is for reference Figure 4An optical lens according to Embodiment 4 of this application is described. Figure 4 A schematic diagram of the structure of an optical lens according to Embodiment 4 of this application is shown.

[0172] like Figure 4 As shown, the optical lens includes, in sequence from the first side to the second side along the optical axis, a first lens L1, a second lens L2, a third lens L3, a fourth lens L4, a fifth lens L5, a sixth lens L6, and a seventh lens L7.

[0173] The first lens L1 is a concave-concave lens with negative optical power, its first side surface S1 is concave, and its second side surface S2 is concave. The second lens L2 is a convex-concave lens with positive optical power, its first side surface S3 is convex, and its second side surface S4 is concave. The third lens L3 is a convex-convex lens with positive optical power, its first side surface S6 is convex, and its second side surface S7 is convex. The fourth lens L4 is a convex-convex lens with positive optical power, its first side surface S8 is convex, and its second side surface S9 is convex. The fifth lens L5 is a concave-concave lens with negative optical power, its first side surface S9 is concave, and its second side surface S10 is concave. The sixth lens L6 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 seventh lens L7 is a convex-concave lens with negative optical power, its first side surface S12 is convex, and its second side surface S13 is concave.

[0174] The optical lens may also include an aperture stop STO, which can be positioned between the second lens L2 and the third lens L3 to increase the outgoing light and ensure sufficient light transmission. For example, the aperture stop STO can be positioned between the second lens L2 and the third lens L3, near the second side surface S4 of the second lens L2.

[0175] Optionally, the optical lens may further include a filter L8 having a first side surface S14 and a second side surface S15, which can be used to correct color deviation. Optionally, the optical lens may further include a protective glass L9 having a first side surface S16 and a second side surface S17, which can be used to protect the image sensor chip IMA located on the imaging surface and / or the image source surface. When the optical lens is used for imaging, light from the object passes sequentially through each surface S1 to S17 and is finally imaged on the imaging surface; when the optical lens is used for projection, light from the image source surface passes sequentially through each surface S17 to S1 and is finally projected onto the target object (not shown).

[0176] Table 7 shows the radius of curvature R, thickness / distance d, refractive index N, and Abbe number Vd of each lens in the optical lens of Example 4. Table 8 shows the conic coefficients and higher-order coefficients that can be used for each aspherical mirror in Example 4, wherein each aspherical surface shape can be defined by formula (1) given in Example 1 above.

[0177]

[0178]

[0179] Table 7

[0180] Face number k A4 A6 A8 A10 A12 A14 A16 S3 -1.1813 -5.0216E-05 -3.5999E-06 1.1111E-08 1.1125E-09 -1.7696E-11 -1.8265E-12 4.1969E-14 S4 -25.0730 5.9839E-05 -5.0378E-06 1.0997E-07 -1.0455E-09 3.3510E-11 -5.3830E-12 1.0101E-13 S12 111.7484 -1.7139E-03 -1.4895E-06 -4.7634E-06 1.9798E-07 4.7660E-09 -9.1351E-10 1.9392E-11 S13 8.8839 -8.0227E-04 -5.0540E-05 6.4224E-06 -5.2212E-07 2.2518E-08 -4.0837E-10 1.1992E-12

[0181] Table 8

[0182] Example 5

[0183] 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.

[0184] like Figure 5 As shown, the optical lens includes, in sequence from the first side to the second side along the optical axis, a first lens L1, a second lens L2, a third lens L3, a fourth lens L4, a fifth lens L5, a sixth lens L6, and a seventh lens L7.

[0185] The first lens L1 is a concave-concave lens with negative optical power, its first side surface S1 is concave, and its second side surface S2 is concave. The second lens L2 is a convex-convex lens with positive optical power, its first side surface S3 is convex, and its second side surface S4 is convex. The third lens L3 is a convex-convex lens with positive optical power, its first side surface S6 is convex, and its second side surface S7 is convex. The fourth lens L4 is a convex-concave lens with positive optical power, its first side surface S8 is convex, and its second side surface S9 is concave. The fifth lens L5 is a convex-concave lens with negative optical power, its first side surface S9 is convex, and its second side surface S10 is concave. The sixth lens L6 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 seventh lens L7 is a concave-concave lens with negative optical power, its first side surface S12 is concave, and its second side surface S13 is concave.

[0186] The optical lens may also include an aperture stop STO, which can be positioned between the second lens L2 and the third lens L3 to increase the amount of outgoing light and ensure sufficient light transmission. For example, the aperture stop STO can be positioned near the middle between the second lens L2 and the third lens L3.

[0187] Optionally, the optical lens may further include a filter L8 having a first side surface S14 and a second side surface S15, which can be used to correct color deviation. Optionally, the optical lens may further include a protective glass L9 having a first side surface S16 and a second side surface S17, which can be used to protect the image sensor chip IMA located on the imaging surface and / or the image source surface. When the optical lens is used for imaging, light from the object passes sequentially through each surface S1 to S17 and is finally imaged on the imaging surface; when the optical lens is used for projection, light from the image source surface passes sequentially through each surface S17 to S1 and is finally projected onto the target object (not shown).

[0188] Table 9 shows the radius of curvature R, thickness / distance d, refractive index N, and Abbe number Vd of each lens in the optical lens of Example 5. Table 10 shows the conic coefficients and higher-order coefficients that can be used for each aspherical mirror in Example 5, wherein each aspherical surface shape can be defined by formula (1) given in Example 1 above.

[0189]

[0190] Table 9

[0191] Face number k A4 A6 A8 A10 A12 A14 A16 S3 -2.14E+01 -1.4330E-04 -6.2796E-06 9.1669E-08 -2.5156E-11 -6.3307E-11 6.2426E-13 3.6010E-14 S4 90.3151 -4.0975E-05 -3.5927E-06 1.3933E-07 -2.9167E-09 4.8797E-11 -8.5504E-13 2.4389E-14 S12 90.6595 -1.9270E-03 2.9788E-05 -6.1005E-06 3.0942E-07 9.8562E-09 -1.4336E-09 2.8091E-11 S13 9.4064 -1.1456E-03 -1.7175E-05 5.2293E-06 -5.1668E-07 2.5392E-08 -4.9374E-10 -6.3824E-13

[0192] Table 10

[0193] Example 6

[0194] 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.

[0195] like Figure 6 As shown, the optical lens includes, in sequence from the first side to the second side along the optical axis, a first lens L1, a second lens L2, a third lens L3, a fourth lens L4, a fifth lens L5, a sixth lens L6, and a seventh lens L7.

[0196] The first lens L1 is a concave-concave lens with negative optical power, its first side surface S1 is concave, and its second side surface S2 is concave. The second lens L2 is a convex-convex lens with positive optical power, its first side surface S3 is convex, and its second side surface S4 is convex. The third lens L3 is a convex-convex lens with positive optical power, its first side surface S6 is convex, and its second side surface S7 is convex. The fourth lens L4 is a convex-concave lens with positive optical power, its first side surface S8 is convex, and its second side surface S9 is concave. The fifth lens L5 is a convex-concave lens with negative optical power, its first side surface S9 is convex, and its second side surface S10 is concave. The sixth lens L6 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 seventh lens L7 is a concave-concave lens with negative optical power, its first side surface S12 is concave, and its second side surface S13 is concave.

[0197] The optical lens may also include an aperture stop STO, which can be positioned between the second lens L2 and the third lens L3 to increase the amount of outgoing light and ensure sufficient light transmission. For example, the aperture stop STO can be positioned near the middle between the second lens L2 and the third lens L3.

[0198] Optionally, the optical lens may further include a filter L8 having a first side surface S14 and a second side surface S15, which can be used to correct color deviation. Optionally, the optical lens may further include a protective glass L9 having a first side surface S16 and a second side surface S17, which can be used to protect the image sensor chip IMA located on the imaging surface and / or the image source surface. When the optical lens is used for imaging, light from the object passes sequentially through each surface S1 to S17 and is finally imaged on the imaging surface; when the optical lens is used for projection, light from the image source surface passes sequentially through each surface S17 to S1 and is finally projected onto the target object (not shown).

[0199] Table 11 shows the radius of curvature R, thickness / distance d, refractive index N, and Abbe number Vd of each lens in the optical lens of Example 6. Table 12 shows the conic coefficients and higher-order coefficients that can be used for each aspherical mirror in Example 6, wherein each aspherical surface shape can be defined by formula (1) given in Example 1 above.

[0200]

[0201]

[0202] Table 11

[0203] Face number k A4 A6 A8 A10 A12 A14 A16 S3 -5.7771 -1.2627E-04 -6.5743E-06 8.4729E-08 1.0802E-10 -5.2545E-11 7.7215E-13 1.7635E-14 S4 143.0531 -4.3451E-05 -2.8959E-06 1.5907E-07 -2.5967E-09 4.9007E-11 -1.1080E-12 9.3629E-15 S12 111.7484 -1.7822E-03 1.9339E-05 -6.3505E-06 3.1841E-07 1.1122E-08 -1.3752E-09 2.5376E-11 S13 8.9881 -1.2525E-03 -1.0655E-05 5.0871E-06 -5.3065E-07 2.4910E-08 -4.8680E-10 2.1057E-12

[0204] Table 12

[0205] Example 7

[0206] 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.

[0207] like Figure 7 As shown, the optical lens includes, in sequence from the first side to the second side along the optical axis, a first lens L1, a second lens L2, a third lens L3, a fourth lens L4, a fifth lens L5, a sixth lens L6, and a seventh lens L7.

[0208] The first lens L1 is a concave-concave lens with negative optical power, its first side surface S1 is concave, and its second side surface S2 is concave. The second lens L2 is a convex-convex lens with positive optical power, its first side surface S3 is convex, and its second side surface S4 is convex. The third lens L3 is a convex-convex lens with positive optical power, its first side surface S6 is convex, and its second side surface S7 is convex. The fourth lens L4 is a convex-convex lens with positive optical power, its first side surface S8 is convex, and its second side surface S9 is convex. The fifth lens L5 is a concave-concave lens with negative optical power, its first side surface S9 is concave, and its second side surface S10 is concave. The sixth lens L6 is a convex-concave lens with negative optical power, its first side surface S10 is convex, and its second side surface S11 is concave. The seventh lens L7 is a concave-concave lens with negative optical power, its first side surface S12 is concave, and its second side surface S13 is concave.

[0209] The optical lens may also include an aperture stop STO, which can be positioned between the second lens L2 and the third lens L3 to increase the amount of outgoing light and ensure sufficient light transmission. For example, the aperture stop STO can be positioned near the middle between the second lens L2 and the third lens L3.

[0210] Optionally, the optical lens may further include a filter L8 having a first side surface S14 and a second side surface S15, which can be used to correct color deviation. Optionally, the optical lens may further include a protective glass L9 having a first side surface S16 and a second side surface S17, which can be used to protect the image sensor chip IMA located on the imaging surface and / or the image source surface. When the optical lens is used for imaging, light from the object passes sequentially through each surface S1 to S17 and is finally imaged on the imaging surface; when the optical lens is used for projection, light from the image source surface passes sequentially through each surface S17 to S1 and is finally projected onto the target object (not shown).

[0211] Table 13 shows the radius of curvature R, thickness / distance d, refractive index N, and Abbe number Vd of each lens in the optical lens of Example 7. Table 14 shows the conic coefficients and higher-order coefficients that can be used for each aspherical mirror in Example 7, wherein each aspherical surface shape can be defined by formula (1) given in Example 1 above.

[0212]

[0213] Table 13

[0214] Face number k A4 A6 A8 A10 A12 A14 A16 S3 -44.8893 -1.5794E-04 -2.3734E-06 1.4243E-07 -2.4197E-09 -2.1340E-10 -1.8971E-12 2.5803E-13 S4 85.0915 2.1366E-05 -6.0288E-06 1.0343E-07 -2.2060E-09 1.2274E-10 1.4285E-12 -8.9050E-14 S12 111.7484 -2.4503E-03 4.1702E-05 -6.5126E-06 3.0800E-07 9.6824E-09 -1.5437E-09 4.5133E-11 S13 7.6602 -1.4217E-03 -2.6528E-05 5.9593E-06 -5.0747E-07 2.5369E-08 -4.9914E-10 -2.2879E-12

[0215] Table 14

[0216] Example 8

[0217] 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.

[0218] like Figure 8 As shown, the optical lens includes, in sequence from the first side to the second side along the optical axis, a first lens L1, a second lens L2, a third lens L3, a fourth lens L4, a fifth lens L5, a sixth lens L6, and a seventh lens L7.

[0219] The first lens L1 is a concave-concave lens with negative optical power, its first side surface S1 is concave, and its second side surface S2 is concave. The second lens L2 is a convex-convex lens with positive optical power, its first side surface S3 is convex, and its second side surface S4 is convex. The third lens L3 is a convex-convex lens with positive optical power, its first side surface S6 is convex, and its second side surface S7 is convex. The fourth lens L4 is a convex-convex lens with positive optical power, its first side surface S8 is convex, and its second side surface S9 is convex. The fifth lens L5 is a concave-concave lens with negative optical power, its first side surface S9 is concave, and its second side surface S10 is concave. The sixth lens L6 is a convex-concave lens with negative optical power, its first side surface S10 is convex, and its second side surface S11 is concave. The seventh lens L7 is a concave-concave lens with negative optical power, its first side surface S12 is concave, and its second side surface S13 is concave.

[0220] The optical lens may also include an aperture stop STO, which can be positioned between the second lens L2 and the third lens L3 to increase the amount of outgoing light and ensure sufficient light transmission. For example, the aperture stop STO can be positioned near the middle between the second lens L2 and the third lens L3.

[0221] Optionally, the optical lens may further include a filter L8 having a first side surface S14 and a second side surface S15, which can be used to correct color deviation. Optionally, the optical lens may further include a protective glass L9 having a first side surface S16 and a second side surface S17, which can be used to protect the image sensor chip IMA located on the imaging surface and / or the image source surface. When the optical lens is used for imaging, light from the object passes sequentially through each surface S1 to S17 and is finally imaged on the imaging surface; when the optical lens is used for projection, light from the image source surface passes sequentially through each surface S17 to S1 and is finally projected onto the target object (not shown).

[0222] Table 15 shows the radius of curvature R, thickness / distance d, refractive index N, and Abbe number Vd of each lens in the optical lens of Example 8. Table 16 shows the conic coefficients and higher-order coefficients that can be used for each aspherical mirror in Example 8, wherein each aspherical surface shape can be defined by formula (1) given in Example 1 above.

[0223]

[0224] Table 15

[0225]

[0226]

[0227] Table 16

[0228] Example 9

[0229] The following is for reference Figure 9 An optical lens according to Embodiment 9 of this application is described. Figure 9 A schematic diagram of the structure of an optical lens according to Embodiment 9 of this application is shown.

[0230] like Figure 9 As shown, the optical lens includes, in sequence from the first side to the second side along the optical axis, a first lens L1, a second lens L2, a third lens L3, a fourth lens L4, a fifth lens L5, a sixth lens L6, and a seventh lens L7.

[0231] The first lens L1 is a concave-concave lens with negative optical power, its first side surface S1 is concave, and its second side surface S2 is concave. The second lens L2 is a convex-concave lens with positive optical power, its first side surface S3 is convex, and its second side surface S4 is concave. The third lens L3 is a convex-convex lens with positive optical power, its first side surface S6 is convex, and its second side surface S7 is convex. The fourth lens L4 is a convex-concave lens with positive optical power, its first side surface S8 is convex, and its second side surface S9 is concave. The fifth lens L5 is a convex-concave lens with negative optical power, its first side surface S10 is convex, and its second side surface S11 is concave. The sixth lens L6 is a convex-concave lens with positive optical power, its first side surface S12 is convex, and its second side surface S13 is concave. The seventh lens L7 is a concave-concave lens with negative optical power, its first side surface S14 is concave, and its second side surface S15 is concave.

[0232] The optical lens may also include an aperture stop STO, which can be positioned between the second lens L2 and the third lens L3 to increase the outgoing light and ensure sufficient light transmission. For example, the aperture stop STO can be positioned between the second lens L2 and the third lens L3, near the second side surface S4 of the second lens L2.

[0233] Optionally, the optical lens may further include a filter L8 having a first side surface S16 and a second side surface S17, which can be used to correct color deviation. Optionally, the optical lens may further include a protective glass L9 having a first side surface S18 and a second side surface S19, which can be used to protect the image sensor chip IMA located on the imaging surface and / or the image source surface. When the optical lens is used for imaging, light from the object passes sequentially through each surface S1 to S19 and is finally imaged on the imaging surface; when the optical lens is used for projection, light from the image source surface passes sequentially through each surface S19 to S1 and is finally projected onto the target object (not shown).

[0234] Table 17 shows the radius of curvature R, thickness / distance d, refractive index N, and Abbe number Vd of each lens in the optical lens of Example 9. Table 18 shows the conic coefficients and higher-order coefficients that can be used for each aspherical mirror in Example 9, wherein each aspherical surface shape can be defined by formula (1) given in Example 1 above.

[0235]

[0236]

[0237] Table 17

[0238] Face number k A4 A6 A8 A10 A12 A14 A16 S3 -2.1907 -8.0339E-05 -4.2526E-06 1.1678E-09 1.8612E-09 -7.1812E-12 -2.7891E-12 6.1277E-14 S4 -112.5630 5.3348E-05 -4.3750E-06 5.9617E-08 -1.3891E-09 1.0210E-10 -2.5134E-12 2.5355E-14 S14 111.7484 -1.9511E-03 1.1417E-05 -2.7185E-06 1.4740E-07 9.2394E-10 -4.5250E-10 1.1557E-11 S15 3.8345 -1.1148E-03 -9.1450E-06 4.8271E-06 -4.7667E-07 2.3900E-08 -5.2999E-10 2.9502E-12

[0239] Table 18

[0240] Example 10

[0241] The following is for reference Figure 10 An optical lens according to Embodiment 10 of this application is described. Figure 10 A schematic diagram of the structure of an optical lens according to Embodiment 10 of this application is shown.

[0242] like Figure 10 As shown, the optical lens includes, in sequence from the first side to the second side along the optical axis, a first lens L1, a second lens L2, a third lens L3, a fourth lens L4, a fifth lens L5, a sixth lens L6, and a seventh lens L7.

[0243] The first lens L1 is a concave-concave lens with negative optical power, its first side surface S1 is concave, and its second side surface S2 is concave. The second lens L2 is a convex-concave lens with positive optical power, its first side surface S3 is convex, and its second side surface S4 is concave. The third lens L3 is a convex-convex lens with positive optical power, its first side surface S6 is convex, and its second side surface S7 is convex. The fourth lens L4 is a convex-convex lens with positive optical power, its first side surface S8 is convex, and its second side surface S9 is convex. The fifth lens L5 is a concave-concave lens with negative optical power, its first side surface S10 is concave, and its second side surface S11 is concave. The sixth lens L6 is a convex-concave lens with positive optical power, its first side surface S12 is convex, and its second side surface S13 is concave. The seventh lens L7 is a convex-concave lens with negative optical power, its first side surface S14 is convex, and its second side surface S15 is concave.

[0244] The optical lens may also include an aperture stop STO, which can be positioned between the second lens L2 and the third lens L3 to increase the outgoing light and ensure sufficient light transmission. For example, the aperture stop STO can be positioned between the second lens L2 and the third lens L3, near the second side surface S4 of the second lens L2.

[0245] Optionally, the optical lens may further include a filter L8 having a first side surface S16 and a second side surface S17, which can be used to correct color deviation. Optionally, the optical lens may further include a protective glass L9 having a first side surface S18 and a second side surface S19, which can be used to protect the image sensor chip IMA located on the imaging surface and / or the image source surface. When the optical lens is used for imaging, light from the object passes sequentially through each surface S1 to S19 and is finally imaged on the imaging surface; when the optical lens is used for projection, light from the image source surface passes sequentially through each surface S19 to S1 and is finally projected onto the target object (not shown).

[0246] Table 19 shows the radius of curvature R, thickness / distance d, refractive index N, and Abbe number Vd of each lens in the optical lens of Example 10. Table 20 shows the conic coefficients and higher-order coefficients that can be used for each aspherical mirror in Example 10, wherein each aspherical surface shape can be defined by formula (1) given in Example 1 above.

[0247]

[0248] Table 19

[0249] Face number k A4 A6 A8 A10 A12 A14 A16 S3 -1.1813 -5.0216E-05 -3.5999E-06 1.1111E-08 1.1125E-09 -1.7696E-11 -1.8265E-12 4.1969E-14 S4 -25.0730 5.9839E-05 -5.0378E-06 1.0997E-07 -1.0455E-09 3.3510E-11 -5.3830E-12 1.0101E-13 S14 111.7484 -1.7139E-03 -1.4895E-06 -4.7634E-06 1.9798E-07 4.7660E-09 -9.1351E-10 1.9392E-11 S15 8.8839 -8.0227E-04 -5.0540E-05 6.4224E-06 -5.2212E-07 2.2518E-08 -4.0837E-10 1.1992E-12

[0250] Table 20

[0251] Example 11

[0252] The following is for reference Figure 11 An optical lens according to Embodiment 11 of this application is described. Figure 11 A schematic diagram of the structure of an optical lens according to Embodiment 11 of this application is shown.

[0253] like Figure 11 As shown, the optical lens includes, in sequence from the first side to the second side along the optical axis, a first lens L1, a second lens L2, a third lens L3, a fourth lens L4, a fifth lens L5, a sixth lens L6, and a seventh lens L7.

[0254] The first lens L1 is a concave-concave lens with negative optical power, its first side surface S1 is concave, and its second side surface S2 is concave. The second lens L2 is a convex-convex lens with positive optical power, its first side surface S3 is convex, and its second side surface S4 is convex. The third lens L3 is a convex-convex lens with positive optical power, its first side surface S6 is convex, and its second side surface S7 is convex. The fourth lens L4 is a convex-concave lens with positive optical power, its first side surface S8 is convex, and its second side surface S9 is concave. The fifth lens L5 is a convex-concave lens with negative optical power, its first side surface S10 is convex, and its second side surface S11 is concave. The sixth lens L6 is a convex-concave lens with positive optical power, its first side surface S12 is convex, and its second side surface S13 is concave. The seventh lens L7 is a concave-concave lens with negative optical power, its first side surface S14 is concave, and its second side surface S15 is concave.

[0255] The optical lens may also include an aperture stop STO, which can be positioned between the second lens L2 and the third lens L3 to increase the amount of outgoing light and ensure sufficient light transmission. For example, the aperture stop STO can be positioned near the middle between the second lens L2 and the third lens L3.

[0256] Optionally, the optical lens may further include a filter L8 having a first side surface S16 and a second side surface S17, which can be used to correct color deviation. Optionally, the optical lens may further include a protective glass L9 having a first side surface S18 and a second side surface S19, which can be used to protect the image sensor chip IMA located on the imaging surface and / or the image source surface. When the optical lens is used for imaging, light from the object passes sequentially through each surface S1 to S19 and is finally imaged on the imaging surface; when the optical lens is used for projection, light from the image source surface passes sequentially through each surface S19 to S1 and is finally projected onto the target object (not shown).

[0257] Table 21 shows the radius of curvature R, thickness / distance d, refractive index N, and Abbe number Vd of each lens in the optical lens of Example 11. Table 22 shows the conic coefficients and higher-order coefficients that can be used for each aspherical mirror in Example 11, wherein each aspherical surface shape can be defined by formula (1) given in Example 1 above.

[0258]

[0259]

[0260] Table 21

[0261] Face number k A4 A6 A8 A10 A12 A14 A16 S3 -5.7771 -1.2627E-04 -6.5743E-06 8.4729E-08 1.0802E-10 -5.2545E-11 7.7215E-13 1.7635E-14 S4 143.0531 -4.3451E-05 -2.8959E-06 1.5907E-07 -2.5967E-09 4.9007E-11 -1.1080E-12 9.3629E-15 S14 111.7484 -1.7822E-03 1.9339E-05 -6.3505E-06 3.1841E-07 1.1122E-08 -1.3752E-09 2.5376E-11 S15 8.9881 -1.2525E-03 -1.0655E-05 5.0871E-06 -5.3065E-07 2.4910E-08 -4.8680E-10 2.1057E-12

[0262] Table 22

[0263] Example 12

[0264] The following is for reference Figure 12 An optical lens according to Embodiment 12 of this application is described. Figure 12 A schematic diagram of the structure of an optical lens according to Embodiment 12 of this application is shown.

[0265] like Figure 12 As shown, the optical lens includes, in sequence from the first side to the second side along the optical axis, a first lens L1, a second lens L2, a third lens L3, a fourth lens L4, a fifth lens L5, a sixth lens L6, and a seventh lens L7.

[0266] The first lens L1 is a concave-concave lens with negative optical power, its first side surface S1 is concave, and its second side surface S2 is concave. The second lens L2 is a convex-convex lens with positive optical power, its first side surface S3 is convex, and its second side surface S4 is convex. The third lens L3 is a convex-convex lens with positive optical power, its first side surface S6 is convex, and its second side surface S7 is convex. The fourth lens L4 is a convex-convex lens with positive optical power, its first side surface S8 is convex, and its second side surface S9 is convex. The fifth lens L5 is a concave-concave lens with negative optical power, its first side surface S10 is concave, and its second side surface S11 is concave. The sixth lens L6 is a convex-concave lens with negative optical power, its first side surface S12 is convex, and its second side surface S13 is concave. The seventh lens L7 is a concave-concave lens with negative optical power, its first side surface S14 is concave, and its second side surface S15 is concave.

[0267] The optical lens may also include an aperture stop STO, which can be positioned between the second lens L2 and the third lens L3 to increase the amount of outgoing light and ensure sufficient light transmission. For example, the aperture stop STO can be positioned near the middle between the second lens L2 and the third lens L3.

[0268] Optionally, the optical lens may further include a filter L8 having a first side surface S16 and a second side surface S17, which can be used to correct color deviation. Optionally, the optical lens may further include a protective glass L9 having a first side surface S18 and a second side surface S19, which can be used to protect the image sensor chip IMA located on the imaging surface and / or the image source surface. When the optical lens is used for imaging, light from the object passes sequentially through each surface S1 to S19 and is finally imaged on the imaging surface; when the optical lens is used for projection, light from the image source surface passes sequentially through each surface S19 to S1 and is finally projected onto the target object (not shown).

[0269] Table 23 shows the radius of curvature R, thickness / distance d, refractive index N, and Abbe number Vd of each lens in the optical lens of Example 12. Table 24 shows the conic coefficients and higher-order coefficients that can be used for each aspherical mirror in Example 12, wherein each aspherical surface shape can be defined by formula (1) given in Example 1 above.

[0270]

[0271] Table 23

[0272] Face number k A4 A6 A8 A10 A12 A14 A16 S3 -44.8980 -1.5795E-04 -2.3734E-06 1.4245E-07 -2.4191E-09 -2.1338E-10 -1.8971E-12 2.5802E-13 S4 85.0699 2.1373E-05 -6.0288E-06 1.0342E-07 -2.2064E-09 1.2274E-10 1.4286E-12 -8.9015E-14 S14 111.7484 -2.4504E-03 4.1699E-05 -6.5126E-06 3.0800E-07 9.6824E-09 -1.5437E-09 4.5141E-11 S15 7.6593 -1.4217E-03 -2.6531E-05 5.9593E-06 -5.0747E-07 2.5369E-08 -4.9912E-10 -2.2876E-12

[0273] Table 24

[0274] In summary, Examples 1 to 12 satisfy the relationships shown in Tables 25-1, 25-2, and 25-3 respectively. In Tables 25-1, 25-2, and 25-3, the units of TTL, F, F1, F2, F3, F4, F5, F6, F7, SAG61, SAG62, D61, D62, D, BFL, R6, R7, H, F456, EPD, d4, d5, d6, Ti10, d46, F45, T, and d7 are all millimeters (mm), the unit of FOV is degrees (°), and the units of θ1 and θ2 are radians.

[0275]

[0276]

[0277]

[0278] Table 25-1

[0279]

[0280]

[0281]

[0282] Table 25-2

[0283]

[0284]

[0285] Table 25-3

[0286] 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.

[0287] 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 concave side and a second concave side. A second lens with positive optical power has a convex first side surface; A third lens with positive optical power has a first convex side and a second convex side. The fourth lens with positive optical power has a convex first side surface; The fifth lens with negative optical power has a concave second side surface; A sixth lens with optical power, its first side surface being convex and its second side surface being concave; and The seventh lens, which has negative optical power, has a concave second side surface; Wherein, the first side is the object side and the second side is the image side; or, the first side is the imaging side and the second side is the image source side; The optical lens has seven lenses with optical power. The sag SAG61 at the maximum aperture of the first side of the sixth lens, the maximum aperture D61 of the first side of the sixth lens, the sag SAG62 at the maximum aperture of the second side of the sixth lens, and the maximum aperture D62 of the second side of the sixth lens satisfy: 0.2≤(SAG61 / D61) / (SAG62 / D62)≤2.5; 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: 1.907≤D / H / θ≤5.

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

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

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

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

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

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

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

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

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

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

12. The optical lens according to claim 1, characterized in that, The fourth lens, the fifth lens, and the sixth lens are cemented together to form a cemented lens.

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

14. The optical lens according to claim 1, characterized in that, The seventh lens has at least one inflection point on its second side surface.

15. The optical lens according to any one of claims 1-14, 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: 1.960≤TTL / F≤2.

5.

16. The optical lens according to any one of claims 1-14, characterized in that, The Abbe number Vd3 of the third lens and the Abbe number Vd4 of the fourth lens satisfy the following condition: 156.348 ≥ Vd3 + Vd4 ≥ 100.

17. The optical lens according to any one of claims 1-14, characterized in that, The sag SAG61 at the maximum aperture of the first side of the sixth lens, the maximum aperture D61 at the first side of the sixth lens, the sag SAG62 at the maximum aperture of the second side of the sixth lens, and the maximum aperture D62 at the second side of the sixth lens satisfy: 0.5≤(SAG61 / D61) / (SAG62 / D62)≤2.

18. The optical lens according to any one of claims 1-14, characterized in that, The effective focal length F4 of the fourth lens and the effective focal length F5 of the fifth lens satisfy the following condition: 0.984≤|F4 / F5|≤2.

5.

19. The optical lens according to any one of claims 1-14, characterized in that, The center thickness d4 of the fourth lens on the optical axis, the center thickness d5 of the fifth lens on the optical axis, the center thickness d6 of the sixth lens on the optical axis, and the distance TTL from the center of the first side of the first lens to the imaging surface of the optical lens on the optical axis satisfy: 0.1≤(d4+d5+d6) / TTL≤0.

8.

20. The optical lens according to any one of claims 1-14, characterized in that, The distance BFL from the center of the second side of the seventh lens to the imaging surface of the optical lens on the optical axis and the distance TTL from the center of the first side of the first lens to the imaging surface of the optical lens on the optical axis satisfy the following condition: 0.134 ≥ BFL / TTL ≥ 0.

05.

21. The optical lens according to any one of claims 1-14, characterized in that, The radius of curvature R6 of the first side surface of the third lens and the radius of curvature R7 of the second side surface of the third lens satisfy: 1.000≤|R6 / R7|≤1.

3.

22. The optical lens according to any one of claims 1-14, 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: 57.342° ≥ (FOV × F) / H ≥ 45°.

23. The optical lens according to any one of claims 1-14, characterized in that, The total effective focal length F of the optical lens and the entrance pupil diameter EPD of the optical lens satisfy the following condition: 1≤F / EPD≤2.

24. The optical lens according to any one of claims 1-14, 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: 1.907≤D / H / θ≤3.

25. The optical lens according to any one of claims 1-14, characterized in that, The combined focal length F45 of the fourth lens and the fifth lens satisfies the following condition with respect to the total effective focal length F of the optical lens: 1.5600≤|F45 / F|≤12.

26. The optical lens according to any one of claims 1-14, characterized in that, The combined focal length F456 of the fourth lens, the fifth lens, and the sixth lens satisfies the following condition with respect to the total effective focal length F of the optical lens: 7746.949 ≥ |F456 / F| ≥ 2.

27. The optical lens according to any one of claims 1-14, characterized in that, The distance Ti10 from the center of the first side of the sixth lens to the imaging surface of the optical lens on the optical axis and the distance TTL from the center of the first side of the first lens to the imaging surface of the optical lens on the optical axis satisfy the following condition: 0.2≤Ti10 / TTL≤0.

6.

28. The optical lens according to any one of claims 1-14, characterized in that, The center thickness d7 of the seventh lens on the optical axis and the distance TTL from the center of the first side of the first lens to the imaging surface of the optical lens on the optical axis satisfy the following condition: 0.05≤d7 / TTL≤0.

2.

29. The optical lens according to any one of claims 1-14, characterized in that, The distance d46 between the center of the second side of the fourth lens and the center of the first side of the sixth lens on the optical axis and the distance TTL between the center of the first side of the first lens and the imaging surface of the optical lens on the optical axis satisfy the following condition: 0.031≤d46 / TTL≤0.

05.

30. The optical lens according to any one of claims 1-14, characterized in that, The angle between the incident ray at the center of the field of view of the optical lens and the optical axis, in radians θ1, and the angle between the outgoing ray at the center of the field of view of the optical lens and the optical axis, in radians θ2, satisfy the condition: 0.7934≤θ2 / θ1≤2.

31. The optical lens according to any one of claims 1-14, characterized in that, The radian value θ1 of the angle between the incident ray at the center of the field of view of the optical lens and the optical axis and the sixth lens, and the radian value θ2 of the angle between the outgoing ray at the center of the field of view of the optical lens and the optical axis, satisfy: 0.7934≤θ2 / θ1≤1.0000.

32. The optical lens according to any one of claims 1-14, 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: 2.1≤|F6 / F|≤10.

33. The optical lens according to any one of claims 1-14, characterized in that, The refractive index N4 of the fourth lens, the refractive index N5 of the fifth lens, and the refractive index N6 of the sixth lens satisfy the following condition: 1≤(N6-N4) / (N5-N4)≤2.

34. The optical lens according to any one of claims 1-14, characterized in that, The refractive index N4 of the fourth lens, the refractive index N5 of the fifth lens, and the refractive index N6 of the sixth lens satisfy the following condition: 1≤(N6-N4) / (N5-N4)≤1.

050.

35. The optical lens according to any one of claims 1-14, characterized in that, The center thickness d4 of the fourth lens on the optical axis, the center thickness d5 of the fifth lens on the optical axis, the center thickness d6 of the sixth lens on the optical axis, and the distance T from the center of the first side of the fourth lens to the center of the second side of the sixth lens on the optical axis satisfy: T≤0.03+d4+d5+d6.

36. The optical lens according to any one of claims 1-14, characterized in that, The optical lens satisfies at least one of the following conditions: 2.1≤|F6 / F|≤8; 1.5600≤|F45 / F|≤10; Wherein, F is the total effective focal length of the optical lens, F6 is the effective focal length of the sixth lens, and F45 is the combined focal length of the fourth and fifth lenses.

37. An electronic device, characterized in that, It includes an optical lens according to any one of claims 1-36 and an imaging element for converting an optical image formed by the optical lens into an electrical signal.

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