Optical lenses and electronic devices

Abstract

This application discloses an optical lens and an electronic device including the optical lens. The optical lens, along its optical axis from the object side to the image side, sequentially includes: a first lens with negative optical power, its object side being convex and its image side being concave; a second lens with negative optical power, its object side being concave; a third lens with positive optical power, its image side being convex; a fourth lens with positive optical power, its object side being convex and its image side being convex; a fifth lens with positive optical power, its object side being convex; a sixth lens with negative optical power, its image side being concave; and a seventh lens with positive optical power, its object side being convex; wherein the optical lens has seven lenses with optical power; the optical power φ23 of the cemented doublet lens formed by the cementing of the second and third lenses satisfies the following condition with respect to the total optical power φ of the optical lens: -0.25 ≤ φ23 / φ ≤ 0.

Description

[0001] Divisional application

[0002] This application is a divisional application of Chinese invention patent application filed on March 8, 2021, entitled "Optical Lens and Electronic Device" with application number 202110251277.1. Technical Field

[0003] This application relates to the field of optical components, and more specifically, to an optical lens and electronic device. Background Technology

[0004] With the improvement of imaging quality, optical lenses have been widely used in various fields, such as intelligent detection, security monitoring, smartphones, and automotive driver assistance systems, playing an irreplaceable role. At the same time, lens manufacturers in various fields are investing heavily in the research and development of lens performance to enhance the competitiveness of their products.

[0005] In particular, in the field of automotive driver assistance systems (ADAS), the onboard camera, as one of the main tools for acquiring external information, directly affects the performance of the ADAS. To accurately acquire external information, the onboard camera needs to be paired with a large-sized, high-resolution chip; therefore, the camera requires high resolution capabilities. Furthermore, for safety reasons, onboard cameras used in autonomous driving also need high stability to withstand various harsh environments, avoiding problems such as reduced image performance under different conditions.

[0006] Currently, to improve the resolving power and image quality of lenses, the market often uses the method of increasing the number of lens elements. However, a higher number of lens elements increases the number of lens assembly components, raises lens sensitivity, and can easily lead to problems such as decreased production yield. In addition, a higher number of lens elements also increases costs and seriously affects lens miniaturization. Summary of the Invention

[0007] This application provides an optical lens comprising, along the optical axis from the object side to the image side: a first lens having negative optical power, with its object side being convex and its image side being concave; a second lens having negative optical power, with its object side being concave; a third lens having positive optical power, with its image side being convex; a fourth lens having positive optical power, with both its object side and image side being convex; a fifth lens having positive optical power, with its object side being convex; a sixth lens having negative optical power, with its image side being concave; and a seventh lens having positive optical power, with its object side being convex. The optical lens comprises seven lenses having optical power; the optical power of the cemented doublet lens formed by the cementing of the second and third lenses is... Total optical power of the optical lens satisfy:

[0008] In one embodiment, the fifth lens, the sixth lens, and the seventh lens are cemented together to form a cemented triplet lens.

[0009] In one embodiment, the image-side surface of the second lens is either convex or concave.

[0010] In one embodiment, the object-side surface of the third lens is either convex or concave.

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

[0012] In one embodiment, the object-side surface of the sixth lens is convex.

[0013] In one embodiment, the image-side surface of the seventh lens is either convex or concave.

[0014] In one embodiment, the first lens, the fourth lens, and the seventh lens have at least two aspherical mirror surfaces.

[0015] In one embodiment, the radius of curvature R52 of the image side of the fifth lens satisfies the condition R52 / F ≥ 0.5 with the total effective focal length F of the optical lens.

[0016] In one embodiment, the radius of curvature R52 of the image side of the fifth lens and the total effective focal length F of the optical lens satisfy: R52 / F≥0.7.

[0017] In one embodiment, the image height H corresponding to the maximum field of view of the optical lens, the total effective focal length F of the optical lens, and the maximum field of view θ of the optical lens in radians satisfy: |(HF×θ) / (F×θ)|≤1.5.

[0018] In one implementation, the image height H corresponding to the maximum field of view of the optical lens, the total effective focal length F of the optical lens, and the maximum field of view θ of the optical lens in radians satisfy: |(HF×θ) / (F×θ)|≤1.

[0019] In one embodiment, the radius of curvature R11 of the object side of the first lens, the radius of curvature R12 of the image side of the first lens, and the center thickness d1 of the first lens on the optical axis satisfy: 1.346≤R11 / (R12+d1)≤2.1.

[0020] In one embodiment, the center thickness d7 of the seventh lens on the optical axis and the center thickness d567 of the three-layer cemented lens formed by cementing the fifth, sixth and seventh lenses on the optical axis satisfy: 0.36≤d7 / d567≤0.478.

[0021] In one embodiment, the effective focal length F1 of the first lens and the total effective focal length F of the optical lens satisfy: 1.8≤|F1 / F|≤2.393.

[0022] In one embodiment, the maximum field of view (FOV) of the optical lens, the maximum aperture D of the object side of the first lens corresponding to the maximum field of view of the optical lens, and the image height H corresponding to the maximum field of view of the optical lens satisfy: 3.6 ≤ (D × 180°) / (H × FOV) ≤ 14.4.

[0023] In one embodiment, the maximum field of view (FOV) of the optical lens, the maximum aperture D of the object side of the first lens corresponding to the maximum field of view of the optical lens, and the image height H corresponding to the maximum field of view of the optical lens satisfy: 3.6 ≤ (D × 180°) / (H × FOV) ≤ 10.8.

[0024] In one embodiment, the distance TTL from the center of the object side of the first lens to the imaging surface of the optical lens on the optical axis satisfies the following condition: 4.255≤TTL / F≤5.5.

[0025] In one embodiment, the distance TTL from the center of the object side of the first lens to the imaging surface of the optical lens on the optical axis, the maximum field of view (FOV) of the optical lens, and the image height H corresponding to the maximum field of view of the optical lens satisfy: 10.44≤(TTL×180°) / (H×FOV)≤14.4.

[0026] In one embodiment, the distance BFL from the center of the image 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 object side of the first lens to the imaging surface of the optical lens on the optical axis satisfy: BFL / TTL≥0.1.

[0027] In one embodiment, the effective focal length F2 of the second lens and the effective focal length F3 of the third lens satisfy: 0.4≤|F3 / F2|≤2.5.

[0028] In one embodiment, the effective focal length F567 of the cemented triplet lens formed by the cementing of the fifth, sixth and seventh lenses satisfies the condition that |F567 / F|≥1.

[0029] In one embodiment, the effective focal length F567 of the cemented triplet lens formed by the cementing of the fifth, sixth and seventh lenses satisfies the following condition with respect to the total effective focal length F of the optical lens: 1.5≤|F567 / F|≤3.752.

[0030] 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: 57°≤(FOV×F) / H≤62.168°.

[0031] In one embodiment, the center thickness d6 of the sixth lens on the optical axis and the center thickness d567 of the triplet lens formed by cementing the fifth, sixth and seventh lenses on the optical axis satisfy: 0.069≤d6 / d567≤0.12.

[0032] In one embodiment, the image height H corresponding to the maximum field of view of the optical lens, the total effective focal length F of the optical lens, and the maximum field of view θ of the optical lens in radians satisfy: 0.806≤(H / 2) / (F×tan(θ / 2))≤1.00.

[0033] In one embodiment, the maximum aperture D of the first lens corresponding to the maximum field of view of the optical lens, the image height H corresponding to the maximum field of view of the optical lens, and the total effective focal length F of the optical lens satisfy: D / H / F≤0.3mm -1 .

[0034] In one embodiment, the maximum aperture D of the object-side surface of the first lens corresponding to the maximum field of view of the optical lens, the image height H corresponding to the maximum field of view of the optical lens, and the total effective focal length F of the optical lens satisfy: 0.160mm -1 ≤D / H / F≤0.3mm -1 .

[0035] In one embodiment, the total effective focal length F of the optical lens, the maximum field of view θ of the optical lens in radians, and the maximum aperture D of the object side of the first lens corresponding to the maximum field of view of the optical lens satisfy: (F×θ) / D≥0.5.

[0036] In one embodiment, the image height H corresponding to the maximum field of view of the optical lens, the maximum aperture D of the object side of the first lens corresponding to the maximum field of view of the optical lens, and the maximum field of view θ of the optical lens in radians satisfy: 1.122≤D / H / θ≤1.8.

[0037] In one implementation, the optical lens satisfies at least one of the following conditions: 3.782≤R52 / F≤6.311, 0.042≤|(HF×θ) / (F×θ)|≤0.084, 1.346≤R11 / (R12+d1)≤1.794, 0.393≤d7 / d567≤0. 478, 2.158≤|F1 / F|≤2.393, 3.6≤(D×180°) / (H×FOV)≤3.78, 4.255≤TTL / F≤4.543, 10.44≤(TTL×180°) / (H× FOV)≤10.8, 0.230≤BFL / TTL≤0.268, 1.448≤|F3 / F2|≤2.065, 1.448≤|F3 / F2|≤2.5, 2.284≤|F567 / F|≤3.7 52, 59.428°≤(FOV×F) / H≤62.168°, 0.069≤d6 / d567≤0.105, 0.806≤(H / 2) / (F×tan(θ / 2))≤0.843, 0.160mm -1 ≤D / H / F≤0.180mm -1 , 0.734≤(F×θ) / D≤0.819, 1.122≤D / H / θ≤1.203, where, The optical power of the cemented doublet lens formed by cementing the second and third lenses together. R52 is the total optical power of the optical lens, R52 is the radius of curvature of the image-side surface of the fifth lens, F is the total effective focal length of the optical lens, H is the image height corresponding to the maximum field of view of the optical lens, θ is the maximum field of view of the optical lens in radians, R11 is the radius of curvature of the object-side surface of the first lens, R12 is the radius of curvature of the image-side surface of the first lens, d1 is the center thickness of the first lens on the optical axis, d7 is the center thickness of the seventh lens on the optical axis, d567 is the center thickness of the cemented triplet lens formed by the cementing of the fifth, sixth, and seventh lenses on the optical axis, and F1 is the first lens... The effective focal length of the lens, FOV is the maximum field of view of the optical lens, D is the maximum aperture of the object side of the first lens corresponding to the maximum field of view of the optical lens, TTL is the distance on the optical axis from the center of the object side of the first lens to the imaging plane of the optical lens, BFL is the distance on the optical axis from the center of the image side of the seventh lens to the imaging plane of the optical lens, F2 is the effective focal length of the second lens, F3 is the effective focal length of the third lens, F567 is the effective focal length of the cemented triplet lens formed by the cementing of the fifth, sixth and seventh lenses, and d6 is the center thickness of the sixth lens on the optical axis.

[0038] In another aspect, this application provides an electronic device. This 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.

[0039] This application achieves at least one of the following beneficial effects by reasonably setting the optical power and surface features of each lens: high pixel count, small front aperture, miniaturization, long back focal length, large center angular resolution, good ghosting performance, better temperature performance, and good image quality. Attached Figure Description

[0040] Other features, objects, and advantages of this utility application will become more apparent from the following detailed description of the embodiments, taken in conjunction with the accompanying drawings. In the drawings:

[0041] Figure 1 This is a schematic diagram illustrating the structure of an optical lens according to Embodiment 1 of this application;

[0042] Figure 2 To illustrate the structure of the optical lens according to Embodiment 2 of this application;

[0043] Figure 3 To illustrate the structure of the optical lens according to Embodiment 3 of this application;

[0044] Figure 4 This is a schematic diagram illustrating the structure of the optical lens according to Embodiment 4 of this application;

[0045] Figure 5 This is a schematic diagram illustrating the structure of the optical lens according to Embodiment 5 of this application;

[0046] Figure 6 To illustrate the structure of the optical lens according to Embodiment 6 of this application;

[0047] Figure 7 To illustrate the structural schematic diagram of the optical lens according to Embodiment 7 of this application; and

[0048] Figure 8 This is a schematic diagram illustrating the structure of an optical lens according to Embodiment 8 of this application. Detailed Implementation

[0049] 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.

[0050] 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.

[0051] 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.

[0052] 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.

[0053] 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.

[0054] 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.

[0055] 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.

[0056] The features, principles and other aspects of this application are described in detail below.

[0057] 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 object side to the image side.

[0058] 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).

[0059] In an exemplary embodiment, the first lens may have negative optical power. The first lens may also have a convex-concave surface. This optical power and surface configuration of the first lens can prevent excessive divergence of object-side light rays after they enter the first lens, which is beneficial for controlling the effective aperture of the rear lens and for achieving lens miniaturization. Setting the first lens to a convex-concave surface can collect as much object-side light as possible into the rear optical lens, increasing the amount of light transmitted. Setting the object-side surface of the first lens to a convex surface is beneficial in practical environments such as rain and snow, as water droplets sliding off can reduce the impact of the actual environment on lens imaging. Additionally, the first lens may have an aspherical mirror surface to improve lens resolution.

[0060] In an exemplary embodiment, the second lens may have negative optical power. The second lens may have a concave-convex or convex surface.

[0061] In an exemplary embodiment, the third lens may have positive optical power. The third lens may have a convex-convex surface or a concave-convex surface.

[0062] In an exemplary embodiment, the fourth lens may have positive optical power. The fourth lens may have a convex-convex surface. This configuration of optical power and surface shape of the fourth lens facilitates light convergence, allowing the light emitted from the third lens to smoothly transition to the fifth lens. Preferably, the fourth lens may have an aspherical surface, which can improve lens resolution.

[0063] In an exemplary embodiment, the fifth lens may have positive optical power. The fifth lens may have a convex-concave surface. This configuration of optical power and surface of the fifth lens is beneficial for converging light rays.

[0064] In an exemplary embodiment, the sixth lens may have negative optical power. The sixth lens may have a convex-concave surface. This configuration of optical power and surface of the sixth lens can prevent excessive divergence of object-side light rays after passing through the sixth lens.

[0065] In an exemplary embodiment, the seventh lens may have positive optical power. The seventh lens may have a convex-convex surface or a convex-concave surface.

[0066] In an exemplary embodiment, the first lens, the fourth lens, and the seventh lens have at least two aspherical mirror surfaces, which can help improve resolution.

[0067] In an exemplary embodiment, the optical lens according to this application can satisfy: TTL / F ≤ 6.5, where TTL is the distance on the optical axis from the center of the object-side surface of the first lens to the imaging surface 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 ≤ 5.5. Satisfying TTL / F ≤ 6.5 can facilitate miniaturization.

[0068] In an exemplary embodiment, the optical lens according to this application satisfies: TTL / H / FOV ≤ 0.08, where TTL is the distance on the optical axis from the center of the object-side surface of the first lens to the imaging surface of the optical lens, H is the image height corresponding to the maximum field of view of the optical lens, and FOV is the maximum field of view of the optical lens. More specifically, TTL, H, and FOV can further satisfy: TTL / H / FOV ≤ 0.07. Satisfying TTL / H / FOV ≤ 0.08 is beneficial for miniaturization, allowing the optical lens to be smaller in size while maintaining the same imaging surface and image height.

[0069] In an exemplary embodiment, the optical lens according to this application satisfies: D / H / FOV ≤ 0.08, where D is the maximum aperture of the object-side surface of the first lens corresponding to the maximum field of view of the optical lens, H is the image height corresponding to the maximum field of view of the optical lens, and FOV is the maximum field of view of the optical lens. More specifically, D, H, and FOV can further satisfy: D / H / FOV ≤ 0.06. Satisfying D / H / FOV ≤ 0.08 can help achieve a smaller front aperture.

[0070] In an exemplary embodiment, the optical lens according to this application satisfies: BFL / TTL ≥ 0.1, where BFL is the distance on the optical axis from the center of the image-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 object-side surface of the first lens to the imaging plane of the optical lens. More specifically, BFL and TTL may further satisfy: BFL / TTL ≥ 0.15. Satisfying BFL / TTL ≥ 0.1 is beneficial for achieving a longer back focal length while miniaturizing the optical lens, thus facilitating assembly.

[0071] In an exemplary embodiment, the optical lens according to this application satisfies: 0.4 ≤ |F3 / F2| ≤ 2.5, where F3 is the effective focal length of the third lens and F2 is the effective focal length of the second lens. More specifically, F3 and F2 further satisfy: 0.6 ≤ |F3 / F2| ≤ 2.3. Satisfying 0.4 ≤ |F3 / F2| ≤ 2.5 helps to smooth the light transition and is beneficial for correcting chromatic aberration.

[0072] In an exemplary embodiment, the optical lens according to this application satisfies: |F567 / F|≥1, where F567 is the effective focal length of the cemented triplet lens formed by the cementation of the fifth, sixth, and seventh lenses, and F is the total effective focal length of the optical lens. More specifically, F567 and F further satisfy: |F567 / F|≥1.5. Satisfying |F567 / F|≥1 helps ensure that the optical lens still has excellent imaging quality in environments with large temperature differences.

[0073] In an exemplary embodiment, the optical lens according to this application satisfies: (FOV×F) / H≥56, 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≥57. Satisfying (FOV×F) / H≥56 is beneficial for the optical lens to simultaneously satisfy characteristics such as telephoto and large field of view.

[0074] In an exemplary embodiment, the optical lens according to this application satisfies: |F1 / F|≥1.8, where F1 is the effective focal length of the first lens and F is the total effective focal length of the optical lens. More specifically, F1 and F may further satisfy: |F1 / F|≥1.90. Satisfying |F1 / F|≥1.8 is beneficial for the optical lens to balance various aberrations.

[0075] In an exemplary embodiment, the optical lens according to this application satisfies: R52 / F ≥ 0.5, where R52 is the radius of curvature of the image-side surface of the fifth lens, and F is the total effective focal length of the optical lens. More specifically, R52 and F may further satisfy: R52 / F ≥ 0.7. Satisfying R52 / F ≥ 0.5 helps to reduce the ghosting energy generated by reflections from the image-side surface of the fifth lens and focus it onto the imaging plane, thereby improving ghosting performance.

[0076] In an exemplary embodiment, the optical lens according to this application satisfies the following condition: d6 / d567 ≤ 0.15, where d6 is the center thickness of the sixth lens on the optical axis, and d567 is the center thickness of the cemented triplet lens formed by the cementing of the fifth, sixth, and seventh lenses on the optical axis. More specifically, d6 and d567 can further satisfy: d6 / d567 ≤ 0.12. Satisfying d6 / d567 ≤ 0.15 helps to reduce the overall aberration of the optical lens and improve image quality.

[0077] In an exemplary embodiment, the optical lens according to this application satisfies: d7 / d567 ≥ 0.36, where d7 is the center thickness of the seventh lens on the optical axis, and d567 is the center thickness of the cemented triplet lens formed by the cementing of the fifth, sixth, and seventh lenses on the optical axis. More specifically, d7 and d567 may further satisfy: d7 / d567 ≥ 0.38. Satisfying d7 / d567 ≥ 0.36 helps to smooth the transition of peripheral light and reduce lens sensitivity.

[0078] In an exemplary embodiment, the optical lens according to this application satisfies: R11 / (R12+d1)≤2.3, where R11 is the radius of curvature of the object-side surface of the first lens, R12 is the radius of curvature of the image-side surface of the first lens, and d1 is the center thickness of the first lens on the optical axis. More specifically, R11, R12, and d1 further satisfy: R11 / (R12+d1)≤2.1. Satisfying R11 / (R12+d1)≤2.3 helps the first lens collect light rays at a larger angle into the optical lens.

[0079] In an exemplary embodiment, the optical lens according to this application satisfies: 0.6 ≤ (H / 2) / (F×tan(θ / 2)) ≤ 1.2, where H is the image height corresponding to the maximum field of view of the optical lens, F is the total effective focal length of the optical lens, and θ is the maximum field of view of the optical lens in radians. More specifically, H, F, and θ further satisfy: 0.65 ≤ (H / 2) / (F×tan(θ / 2)) ≤ 1.00. Satisfying 0.6 ≤ (H / 2) / (F×tan(θ / 2)) ≤ 1.2 is beneficial for achieving a large angular resolution.

[0080] In an exemplary embodiment, the optical lens according to this application satisfies: |(HF×θ) / (F×θ)|≤1.5, where H is the image height corresponding to the maximum field of view of the optical lens, F is the total effective focal length of the optical lens, and θ is the maximum field of view of the optical lens in radians. More specifically, H, F, and θ further satisfy: |(HF×θ) / (F×θ)|≤1. Satisfying |(HF×θ) / (F×θ)|≤1.5 helps to increase the focal length of the lens while keeping the lens field of view and imaging plane size unchanged, thus highlighting the imaging effect of the central area of ​​the lens imaging plane.

[0081] In an exemplary embodiment, the optical lens according to this application satisfies the following condition: D / H / F ≤ 0.35, where D is the maximum aperture of the object-side surface of the first lens corresponding to the maximum field of view of the optical lens, H is the image height corresponding to the maximum field of view of the optical lens, and F is the total effective focal length of the optical lens. More specifically, D, H, and F can further satisfy: D / H / F ≤ 0.3. Satisfying D / H / F ≤ 0.35 is beneficial for the lens to have the characteristics of a large target surface and a small aperture under the condition of fixed lens focal length.

[0082] In an exemplary embodiment, the optical lens according to this application satisfies: (F×θ) / D≥0.5, where F is the total effective focal length of the optical lens, θ is the maximum field of view of the optical lens in radians, and D is the maximum aperture of the object-side surface of the first lens corresponding to the maximum field of view of the optical lens. More specifically, F, θ, and D further satisfy: (F×θ) / D≥0.6. Satisfying (F×θ) / D≥0.5 is beneficial for having a smaller front aperture of the lens, which helps to reduce the lens size.

[0083] In an exemplary embodiment, the optical lens according to this application can satisfy: in, It refers to the optical power of a cemented doublet lens formed by cementing the second and third lenses together. It refers to the total optical power of the lens. More specifically, and Further, it can be satisfied: satisfy It helps to effectively correct lens astigmatism and improve lens resolution.

[0084] In an exemplary embodiment, the optical lens according to this application satisfies: D / H / θ ≤ 1.8, where H is the image height corresponding to the maximum field of view of the optical lens, D is the maximum aperture of the object side of the first lens corresponding to the maximum field of view of the optical lens, and θ is the maximum field of view of the optical lens in radians. More specifically, it further satisfies: D / H / θ ≤ 1.5. Satisfying D / H / θ ≤ 1.8 is beneficial for reducing the front aperture.

[0085] In an exemplary embodiment, an aperture stop may be provided between the third lens and the fourth lens to limit the light beam and further improve the imaging quality of the optical lens. Placing the aperture stop between the third and fourth lenses helps to increase the aperture diameter, reduce the diameter of the lens front end, and converge the light beam to the fourth lens, thus structurally reducing the lens sensitivity. It also effectively converges the light entering the optical lens, reducing the lens aperture. In this embodiment, the aperture stop may be located near the image side of the third lens or near the object side of the fourth lens. 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 placed in other positions as needed.

[0086] 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 image-side elements (e.g., chips) of the optical lens.

[0087] As is known to those skilled in the art, cemented lenses can be used to minimize or eliminate chromatic aberration. The use of cemented lenses in optical lenses can improve image quality, reduce light energy reflection loss, thereby achieving high resolution and enhancing the sharpness of the lens image. Furthermore, the use of cemented lenses can simplify the assembly process in lens manufacturing.

[0088] In an exemplary embodiment, the second and third lenses can be cemented together to form a cemented doublet lens. Cementing a second lens with negative optical power and concave object and image sides with a third lens with positive optical power and convex object and image sides, or cementing a second lens with negative optical power and concave object and image sides with a third lens with positive optical power and convex object and image sides, allows the light rays emitted from the front lenses to smoothly transition to the imaging plane of the optical lens. This facilitates a more compact optical lens structure, reduces the size of the optical lens, helps correct various aberrations in the optical lens, reduces the sensitivity of lens fit, improves resolution, and optimizes optical performance such as distortion and CRA. Of course, the second and third lenses can also be left uncemented, which is beneficial for improving resolving power.

[0089] The above-mentioned bonding method between lenses has at least one of the following advantages: reducing the air gap between the two lenses, making the overall optical system more compact; reducing the number of assembly components between the second and third lenses, reducing processes and lowering costs; reducing the tolerance sensitivity of lens units caused by tilting / eccentricity during assembly; reducing light loss caused by reflection between lenses, thus improving illuminance; reducing chromatic aberration, and can also balance the overall chromatic aberration of the system through residual chromatic aberration.

[0090] In an exemplary embodiment, the fifth, sixth, and seventh lenses can be cemented together to form a cemented triplet lens. Cementing together a fifth lens with positive optical power and convex object-side and image-side surfaces, a sixth lens with negative optical power and convex object-side and image-side surfaces, and a seventh lens with positive optical power and convex object-side and image-side surfaces, or vice versa, allows for a smooth transition of light rays emitted from the preceding lenses to the imaging plane of the optical lens. This facilitates a more compact optical lens structure, reduces its size, helps correct various aberrations, improves ghosting, enhances thermal stability, reduces the sensitivity of lens fit, increases resolution, and optimizes optical performance such as distortion and CRA. Alternatively, the fifth, sixth, and seventh lenses can be left uncemented, which improves resolving power.

[0091] The above-mentioned cemented lens method has at least one of the following advantages: reducing the air gap between the three lenses and reducing the overall system length; reducing the number of assembly components between the fifth, sixth, and seventh lenses, reducing processes and lowering costs; reducing the tolerance sensitivity of each lens unit due to tilting / eccentricity during assembly; reducing light loss caused by reflection between lenses and improving illuminance; and further reducing field curvature and correcting off-axis point aberrations of the system.

[0092] In an exemplary embodiment, the second, third, fifth, and sixth lenses can be spherical lenses; the first, fourth, and seventh lenses can be aspherical lenses. This application does not specifically limit the number of spherical and aspherical lenses; the number of aspherical lenses can be increased when image 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 can all be aspherical lenses. Aspherical lenses are characterized by a continuously changing curvature from the lens center to the periphery. Unlike spherical lenses, which have a constant curvature from the lens center to the periphery, aspherical lenses have better curvature radius characteristics, offering advantages in improving distortion aberrations and astigmatism. Using aspherical lenses can eliminate aberrations that occur during imaging as much as possible, thereby improving the lens's image quality. The use of aspherical lenses helps correct system aberrations and improve resolving power.

[0093] The optical lens according to the above-described embodiments of this application achieves at least one beneficial effect by rationally setting the optical power and surface features of each lens, using only 7 lenses. This includes high resolution (up to 8 megapixels or more), small front aperture, miniaturization, long back focal length, large center angular resolution, telephoto capability, good ghosting performance, excellent temperature performance, low cost, and good image quality. This optical lens satisfies the requirements of high resolution while also achieving small size, low sensitivity, high production yield, and low cost. When used in high and low temperature environments, this optical lens exhibits more stable thermal performance, minimal changes in imaging effect, and stable image quality, which can greatly improve the safety of autonomous driving. Furthermore, the optical lens has a short overall length and a long back focal length, making it easy to assemble and adjust.

[0094] The optical lens according to the above embodiments of this application, by setting doublet lenses and triplet lenses, shares the overall chromatic aberration correction of the system, which is beneficial to correcting system aberrations, improving system resolution quality, reducing fit sensitivity issues, and making the overall structure of the optical system compact, thus meeting the miniaturization requirements.

[0095] In an exemplary embodiment, the first, second, third, fourth, fifth, sixth, and seventh lenses 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 lens blurring caused by high and low temperature variations in the operating environment, thus preventing interference with normal lens use. Specifically, when resolution and reliability are paramount, the first to seventh lenses can all be aspherical glass lenses. Of course, 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. Alternatively, the first to seventh lenses in the optical lens can also be made of a combination of plastic and glass.

[0096] 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.

[0097] Example 1

[0098] 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.

[0099] like Figure 1 As shown, the optical lens includes, in sequence from the object side to the image side, 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 along the optical axis.

[0100] The first lens L1 is a convex-concave lens with negative optical power, its object-side surface S1 is convex, and its image-side surface S2 is concave. The second lens L2 is a biconcave lens with negative optical power, its object-side surface S3 is concave, and its image-side surface S4 is concave. The third lens L3 is a biconvex lens with positive optical power, its object-side surface S4 is convex, and its image-side surface S5 is convex. The fourth lens L4 is a biconvex lens with positive optical power, its object-side surface S7 is convex, and its image-side surface S8 is convex. The fifth lens L5 is a convex-concave lens with positive optical power, its object-side surface S9 is convex, and its image-side surface S10 is concave. The sixth lens L6 is a convex-concave lens with negative optical power, its object-side surface S10 is convex, and its image-side surface S11 is concave. The seventh lens L7 is a biconvex lens with positive optical power, its object-side surface S11 is convex, and its image-side surface S12 is convex. The second lens L2 and the third lens L3 can be cemented together to form a cemented doublet lens. The fifth lens L5, the sixth lens L6, and the seventh lens L7 can be cemented together to form a cemented triplicate lens.

[0101] The optical lens may also include an aperture stop STO, which may be positioned between the third lens L3 and the fourth lens L4 to improve image quality. For example, the aperture stop STO may be positioned between the third lens L3 and the fourth lens L4 near the object side S7 of the fourth lens L4.

[0102] Optionally, the optical lens may also include a filter L8 having an object-side surface S13 and an image-side surface S14, which can be used to correct color aberrations. The optical lens may also include a protective glass L9 having an object-side surface S15 and an image-side surface S16, which can be used to protect the image sensor chip (IMA) located at the imaging surface. Light from the object passes sequentially through each surface S1 to S16 and is finally imaged onto the imaging surface.

[0103] 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 d12 between the first lens L1 and the second lens L2, and so on), refractive index Nd, and Abbe number Vd of each lens of the optical lens of Embodiment 1.

[0104]

[0105]

[0106] Table 1

[0107] In Embodiment 1, the object-side surface S1 and image-side surface S2 of the first lens L1, the object-side surface S7 and image-side surface S8 of the fourth lens L4, and the image-side surface S12 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:

[0108]

[0109] Where x is the distance vector from the vertex of the aspherical surface at a height h along the optical axis; c is the paraxial curvature of the aspherical surface, c = 1 / R (i.e., the paraxial curvature c is the reciprocal of the radius of curvature R in Table 1 above); k is the conic coefficient; Ai is the i-th order correction coefficient of the aspherical surface. Table 2 below gives the conic coefficient k and higher-order coefficients A4, A6, A8, A10 and A12 that can be used for the aspherical mirrors S1, S2, S7, S8 and S12 in Example 1.

[0110] Face number k A4 A6 A8 A10 A12 S1 -2.4423 -1.0876E-03 1.8794E-05 -7.1305E-08 -1.6529E-09 2.1423E-11 S2 -2.4333 4.7585E-04 -1.6706E-05 1.2204E-06 -2.0398E-08 2.9616E-10 S7 -0.3304 4.8972E-06 6.3275E-07 2.6048E-08 -7.2640E-10 1.5926E-11 S8 -0.1477 1.3130E-04 1.6443E-07 6.2944E-08 -1.7545E-09 2.9950E-11 S12 -50.9281 1.4666E-04 6.0994E-06 -6.8152E-08 4.8198E-09 -5.6580E-11

[0111] Table 2

[0112] Example 2

[0113] 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.

[0114] like Figure 2 As shown, the optical lens includes, in sequence from the object side to the image side, 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 along the optical axis.

[0115] The first lens L1 is a convex-concave lens with negative optical power, its object-side surface S1 is convex, and its image-side surface S2 is concave. The second lens L2 is a biconcave lens with negative optical power, its object-side surface S3 is concave, and its image-side surface S4 is concave. The third lens L3 is a biconvex lens with positive optical power, its object-side surface S4 is convex, and its image-side surface S5 is convex. The fourth lens L4 is a biconvex lens with positive optical power, its object-side surface S7 is convex, and its image-side surface S8 is convex. The fifth lens L5 is a convex-concave lens with positive optical power, its object-side surface S9 is convex, and its image-side surface S10 is concave. The sixth lens L6 is a convex-concave lens with negative optical power, its object-side surface S10 is convex, and its image-side surface S11 is concave. The seventh lens L7 is a convex-concave lens with positive optical power, its object-side surface S11 is convex, and its image-side surface S12 is concave. The second lens L2 and the third lens L3 can be cemented together to form a cemented doublet lens. The fifth lens L5, the sixth lens L6, and the seventh lens L7 can be cemented together to form a cemented triplicate lens.

[0116] The optical lens may also include an aperture stop STO, which may be positioned between the third lens L3 and the fourth lens L4 to improve image quality. For example, the aperture stop STO may be positioned between the third lens L3 and the fourth lens L4 near the object side S7 of the fourth lens L4.

[0117] Optionally, the optical lens may also include a filter L8 having an object-side surface S13 and an image-side surface S14, which can be used to correct color aberrations. The optical lens may also include a protective glass L9 having an object-side surface S15 and an image-side surface S16, which can be used to protect the image sensor chip (IMA) located at the imaging surface. Light from the object passes sequentially through each surface S1 to S16 and is finally imaged onto the imaging surface.

[0118] Table 3 shows the radius of curvature R, thickness / distance d, refractive index Nd, 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.

[0119]

[0120] Table 3

[0121]

[0122]

[0123] Table 4

[0124] Example 3

[0125] The following is for reference Figure 3An 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.

[0126] like Figure 3 As shown, the optical lens includes, in sequence from the object side to the image side, 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 along the optical axis.

[0127] The first lens L1 is a convex-concave lens with negative optical power, its object-side surface S1 is convex, and its image-side surface S2 is concave. The second lens L2 is a concave-convex lens with negative optical power, its object-side surface S3 is concave, and its image-side surface S4 is convex. The third lens L3 is a concave-convex lens with positive optical power, its object-side surface S4 is concave, and its image-side surface S5 is convex. The fourth lens L4 is a biconvex lens with positive optical power, its object-side surface S7 is convex, and its image-side surface S8 is convex. The fifth lens L5 is a convex-concave lens with positive optical power, its object-side surface S9 is convex, and its image-side surface S10 is concave. The sixth lens L6 is a convex-concave lens with negative optical power, its object-side surface S10 is convex, and its image-side surface S11 is concave. The seventh lens L7 is a biconvex lens with positive optical power, its object-side surface S11 is convex, and its image-side surface S12 is convex. The second lens L2 and the third lens L3 can be cemented together to form a cemented doublet lens. The fifth lens L5, the sixth lens L6, and the seventh lens L7 can be cemented together to form a cemented triplicate lens.

[0128] The optical lens may also include an aperture stop STO, which may be positioned between the third lens L3 and the fourth lens L4 to improve image quality. For example, the aperture stop STO may be positioned between the third lens L3 and the fourth lens L4 near the object side S7 of the fourth lens L4.

[0129] Optionally, the optical lens may also include a filter L8 having an object-side surface S13 and an image-side surface S14, which can be used to correct color aberrations. The optical lens may also include a protective glass L9 having an object-side surface S15 and an image-side surface S16, which can be used to protect the image sensor chip (IMA) located at the imaging surface. Light from the object passes sequentially through each surface S1 to S16 and is finally imaged onto the imaging surface.

[0130] Table 5 shows the radius of curvature R, thickness / distance d, refractive index Nd, 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.

[0131]

[0132]

[0133] Table 5

[0134] Face number k A4 A6 A8 A10 A12 S1 -1.1976 -1.1685E-03 1.4647E-05 2.0451E-07 -8.2631E-09 9.2389E-11 S2 -1.8481 1.0330E-03 -6.1452E-05 3.5454E-06 -9.6713E-08 1.3752E-09 S7 1.7505 1.4397E-04 1.6062E-06 4.9923E-08 -1.3754E-09 3.3042E-11 S8 -9.8 1.9777E-04 1.6398E-06 1.7615E-07 -5.9713E-09 1.1994E-10 S12 14.3 3.9231E-04 3.8116E-06 2.0151E-07 -4.9873E-09 1.5739E-10

[0135] Table 6

[0136] Example 4

[0137] The following is for reference Figure 4 An optical lens according to Embodiment 4 of this application is described. Figure 4 A schematic diagram of the structure of an optical lens according to Embodiment 4 of this application is shown.

[0138] like Figure 4 As shown, the optical lens includes, in sequence from the object side to the image side, 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 along the optical axis.

[0139] The first lens L1 is a convex-concave lens with negative optical power, its object-side surface S1 is convex, and its image-side surface S2 is concave. The second lens L2 is a concave-convex lens with negative optical power, its object-side surface S3 is concave, and its image-side surface S4 is convex. The third lens L3 is a concave-convex lens with positive optical power, its object-side surface S4 is concave, and its image-side surface S5 is convex. The fourth lens L4 is a biconvex lens with positive optical power, its object-side surface S7 is convex, and its image-side surface S8 is convex. The fifth lens L5 is a convex-concave lens with positive optical power, its object-side surface S9 is convex, and its image-side surface S10 is concave. The sixth lens L6 is a convex-concave lens with negative optical power, its object-side surface S10 is convex, and its image-side surface S11 is concave. The seventh lens L7 is a convex-concave lens with positive optical power, its object-side surface S11 is convex, and its image-side surface S12 is concave. The second lens L2 and the third lens L3 can be cemented together to form a cemented doublet lens. The fifth lens L5, the sixth lens L6, and the seventh lens L7 can be cemented together to form a cemented triplicate lens.

[0140] The optical lens may also include an aperture stop STO, which may be positioned between the third lens L3 and the fourth lens L4 to improve image quality. For example, the aperture stop STO may be positioned between the third lens L3 and the fourth lens L4 near the object side S7 of the fourth lens L4.

[0141] Optionally, the optical lens may also include a filter L8 having an object-side surface S13 and an image-side surface S14, which can be used to correct color aberrations. The optical lens may also include a protective glass L9 having an object-side surface S15 and an image-side surface S16, which can be used to protect the image sensor chip (IMA) located at the imaging surface. Light from the object passes sequentially through each surface S1 to S16 and is finally imaged onto the imaging surface.

[0142] Table 7 shows the radius of curvature R, thickness / distance d, refractive index Nd, 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.

[0143]

[0144] Table 7

[0145] Face number k A4 A6 A8 A10 A12 S1 -1.6519 -1.0718E-03 2.4179E-05 -3.2997E-07 2.7205E-09 -1.0431E-11 S2 -3.7015 8.7930E-04 -3.6578E-05 2.1565E-06 -5.7130E-08 7.6070E-10 S7 -0.0613 6.3530E-05 2.1774E-07 5.4849E-08 -1.8231E-09 3.6035E-11 S8 3.6964 9.4043E-05 -3.2055E-08 7.5172E-08 -2.6908E-09 5.5365E-11 S12 80.1262 6.5067E-04 8.8457E-06 2.5485E-07 -3.2252E-09 2.4746E-10

[0146] Table 8

[0147] Example 5

[0148] 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.

[0149] like Figure 5 As shown, the optical lens includes, in sequence from the object side to the image side, 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 along the optical axis.

[0150] The first lens L1 is a convex-concave lens with negative optical power, its object-side surface S1 is convex, and its image-side surface S2 is concave. The second lens L2 is a biconcave lens with negative optical power, its object-side surface S3 is concave, and its image-side surface S4 is concave. The third lens L3 is a biconvex lens with positive optical power, its object-side surface S4 is convex, and its image-side surface S5 is convex. The fourth lens L4 is a biconvex lens with positive optical power, its object-side surface S7 is convex, and its image-side surface S8 is convex. The fifth lens L5 is a convex-concave lens with positive optical power, its object-side surface S9 is convex, and its image-side surface S10 is concave. The sixth lens L6 is a convex-concave lens with negative optical power, its object-side surface S10 is convex, and its image-side surface S11 is concave. The seventh lens L7 is a biconvex lens with positive optical power, its object-side surface S11 is convex, and its image-side surface S12 is convex. The second lens L2 and the third lens L3 can be cemented together to form a cemented doublet lens. The fifth lens L5, the sixth lens L6, and the seventh lens L7 can be cemented together to form a cemented triplicate lens.

[0151] The optical lens may also include an aperture stop STO, which may be positioned between the third lens L3 and the fourth lens L4 to improve image quality. For example, the aperture stop STO may be positioned between the third lens L3 and the fourth lens L4 near the object side S7 of the fourth lens L4.

[0152] Optionally, the optical lens may also include a filter L8 having an object-side surface S13 and an image-side surface S14, which can be used to correct color aberrations. The optical lens may also include a protective glass L9 having an object-side surface S15 and an image-side surface S16, which can be used to protect the image sensor chip (IMA) located at the imaging surface. Light from the object passes sequentially through each surface S1 to S16 and is finally imaged onto the imaging surface.

[0153] Table 9 shows the radius of curvature R, thickness / distance d, refractive index Nd, 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.

[0154]

[0155] Table 9

[0156] Face number k A4 A6 A8 A10 A12 S1 -2.3923 -1.0876E-03 1.8794E-05 -7.1305E-08 -1.6529E-09 2.1423E-11 S2 -2.4233 4.7585E-04 -1.6706E-05 1.2204E-06 -2.0398E-08 2.9616E-10 S7 -0.3204 4.8972E-06 6.3275E-07 2.6048E-08 -7.2640E-10 1.5926E-11 S8 -0.1477 1.3130E-04 1.6443E-07 6.2944E-08 -1.7545E-09 2.9950E-11 S12 -50.9281 1.4666E-04 6.0994E-06 -6.8152E-08 4.8198E-09 -5.6580E-11

[0157] Table 10

[0158] Example 6

[0159] 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.

[0160] like Figure 6 As shown, the optical lens includes, in sequence from the object side to the image side, 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 along the optical axis.

[0161] The first lens L1 is a convex-concave lens with negative optical power, its object-side surface S1 is convex, and its image-side surface S2 is concave. The second lens L2 is a biconcave lens with negative optical power, its object-side surface S3 is concave, and its image-side surface S4 is concave. The third lens L3 is a biconvex lens with positive optical power, its object-side surface S4 is convex, and its image-side surface S5 is convex. The fourth lens L4 is a biconvex lens with positive optical power, its object-side surface S7 is convex, and its image-side surface S8 is convex. The fifth lens L5 is a convex-concave lens with positive optical power, its object-side surface S9 is convex, and its image-side surface S10 is concave. The sixth lens L6 is a convex-concave lens with negative optical power, its object-side surface S10 is convex, and its image-side surface S11 is concave. The seventh lens L7 is a convex-concave lens with positive optical power, its object-side surface S11 is convex, and its image-side surface S12 is concave. The second lens L2 and the third lens L3 can be cemented together to form a cemented doublet lens. The fifth lens L5, the sixth lens L6, and the seventh lens L7 can be cemented together to form a cemented triplicate lens.

[0162] The optical lens may also include an aperture stop STO, which may be positioned between the third lens L3 and the fourth lens L4 to improve image quality. For example, the aperture stop STO may be positioned between the third lens L3 and the fourth lens L4 near the object side S7 of the fourth lens L4.

[0163] Optionally, the optical lens may also include a filter L8 having an object-side surface S13 and an image-side surface S14, which can be used to correct color aberrations. The optical lens may also include a protective glass L9 having an object-side surface S15 and an image-side surface S16, which can be used to protect the image sensor chip (IMA) located at the imaging surface. Light from the object passes sequentially through each surface S1 to S16 and is finally imaged onto the imaging surface.

[0164] Table 11 shows the radius of curvature R, thickness / distance d, refractive index Nd, 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.

[0165]

[0166]

[0167] Table 11

[0168] Face number k A4 A6 A8 A10 A12 S1 -1.900905 -1.0094E-03 2.0071E-05 -2.2750E-07 1.7851E-09 -9.6256E-12 S2 -2.404285 8.0735E-04 -2.6696E-05 1.6081E-06 -3.8583E-08 5.9153E-10 S7 -0.241774 5.0905E-05 4.7265E-07 4.8610E-08 -1.6688E-09 3.7893E-11 S8 2.040916 1.0260E-04 1.4243E-07 8.5106E-08 -3.0710E-09 6.4348E-11 S12 43.77072 6.1017E-04 8.1312E-06 1.6873E-07 6.3171E-11 1.3549E-10

[0169] Table 12

[0170] Example 7

[0171] The following is for reference Figure 7An 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.

[0172] like Figure 7 As shown, the optical lens includes, in sequence from the object side to the image side, 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 along the optical axis.

[0173] The first lens L1 is a convex-concave lens with negative optical power, its object-side surface S1 is convex, and its image-side surface S2 is concave. The second lens L2 is a concave-convex lens with negative optical power, its object-side surface S3 is concave, and its image-side surface S4 is convex. The third lens L3 is a concave-convex lens with positive optical power, its object-side surface S4 is concave, and its image-side surface S5 is convex. The fourth lens L4 is a biconvex lens with positive optical power, its object-side surface S7 is convex, and its image-side surface S8 is convex. The fifth lens L5 is a convex-concave lens with positive optical power, its object-side surface S9 is convex, and its image-side surface S10 is concave. The sixth lens L6 is a convex-concave lens with negative optical power, its object-side surface S10 is convex, and its image-side surface S11 is concave. The seventh lens L7 is a biconvex lens with positive optical power, its object-side surface S11 is convex, and its image-side surface S12 is convex. The second lens L2 and the third lens L3 can be cemented together to form a cemented doublet lens. The fifth lens L5, the sixth lens L6, and the seventh lens L7 can be cemented together to form a cemented triplicate lens.

[0174] The optical lens may also include an aperture stop STO, which may be positioned between the third lens L3 and the fourth lens L4 to improve image quality. For example, the aperture stop STO may be positioned between the third lens L3 and the fourth lens L4 near the object side S7 of the fourth lens L4.

[0175] Optionally, the optical lens may also include a filter L8 having an object-side surface S13 and an image-side surface S14, which can be used to correct color aberrations. The optical lens may also include a protective glass L9 having an object-side surface S15 and an image-side surface S16, which can be used to protect the image sensor chip (IMA) located at the imaging surface. Light from the object passes sequentially through each surface S1 to S16 and is finally imaged onto the imaging surface.

[0176] Table 13 shows the radius of curvature R, thickness / distance d, refractive index Nd, 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.

[0177]

[0178] Table 13

[0179] Face number k A4 A6 A8 A10 A12 S1 -1.1986 -1.1685E-03 1.4647E-05 2.0451E-07 -8.2631E-09 9.2389E-11 S2 -1.8491 1.0330E-03 -6.1452E-05 3.5454E-06 -9.6713E-08 1.3752E-09 S7 1.7475 1.4397E-04 1.6062E-06 4.9923E-08 -1.3754E-09 3.3042E-11 S8 -9.7997 1.9777E-04 1.6398E-06 1.7615E-07 -5.9713E-09 1.1994E-10 S12 14.3006 3.9231E-04 3.8116E-06 2.0151E-07 -4.9873E-09 1.5739E-10

[0180] Table 14

[0181] Example 8

[0182] 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.

[0183] like Figure 8 As shown, the optical lens includes, in sequence from the object side to the image side, 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 along the optical axis.

[0184] The first lens L1 is a convex-concave lens with negative optical power, its object-side surface S1 is convex, and its image-side surface S2 is concave. The second lens L2 is a concave-convex lens with negative optical power, its object-side surface S3 is concave, and its image-side surface S4 is convex. The third lens L3 is a concave-convex lens with positive optical power, its object-side surface S4 is concave, and its image-side surface S5 is convex. The fourth lens L4 is a biconvex lens with positive optical power, its object-side surface S7 is convex, and its image-side surface S8 is convex. The fifth lens L5 is a convex-concave lens with positive optical power, its object-side surface S9 is convex, and its image-side surface S10 is concave. The sixth lens L6 is a convex-concave lens with negative optical power, its object-side surface S10 is convex, and its image-side surface S11 is concave. The seventh lens L7 is a convex-concave lens with positive optical power, its object-side surface S11 is convex, and its image-side surface S12 is concave. The second lens L2 and the third lens L3 can be cemented together to form a cemented doublet lens. The fifth lens L5, the sixth lens L6, and the seventh lens L7 can be cemented together to form a cemented triplicate lens.

[0185] The optical lens may also include an aperture stop STO, which may be positioned between the third lens L3 and the fourth lens L4 to improve image quality. For example, the aperture stop STO may be positioned between the third lens L3 and the fourth lens L4 near the object side S7 of the fourth lens L4.

[0186] Optionally, the optical lens may also include a filter L8 having an object-side surface S13 and an image-side surface S14, which can be used to correct color aberrations. The optical lens may also include a protective glass L9 having an object-side surface S15 and an image-side surface S16, which can be used to protect the image sensor chip (IMA) located at the imaging surface. Light from the object passes sequentially through each surface S1 to S16 and is finally imaged onto the imaging surface.

[0187] Table 15 shows the radius of curvature R, thickness / distance d, refractive index Nd, 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.

[0188]

[0189]

[0190] Table 15

[0191] Face number k A4 A6 A8 A10 A12 S1 -1.6669 -1.0718E-03 2.4179E-05 -3.2997E-07 2.7205E-09 -1.0431E-11 S2 -3.7038 8.7930E-04 -3.6578E-05 2.1565E-06 -5.7130E-08 7.6070E-10 S7 -0.0608 6.3530E-05 2.1774E-07 5.4849E-08 -1.8231E-09 3.6035E-11 S8 3.6964 9.4043E-05 -3.2055E-08 7.5172E-08 -2.6908E-09 5.5365E-11 S12 80.1418 6.5067E-04 8.8457E-06 2.5485E-07 -3.2252E-09 2.4746E-10

[0192] Table 16

[0193] In summary, Examples 1 to 8 respectively satisfy the relationships shown in Tables 17-1 and 17-2 below. In Tables 17-1 and 17-2, the units of TTL, F, H, D, BFL, F1, F2, F3, F567, d1, d6, d7, d567, R11, R12, and R52 are millimeters (mm), the unit of FOV is degrees (°), and the unit of θ is radians (rad). and The unit is (mm) -1 ).

[0194]

[0195]

[0196] Table 17-1

[0197]

[0198]

[0199] Table 17-2

[0200] 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.

[0201] 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, along the optical axis from the object side to the image side, the following in sequence: The first lens with negative optical power has a convex object side and a concave image side. A second lens with negative optical power has a concave object side. The third lens with positive optical power has a convex image-side surface; The fourth lens with positive optical power has a convex object-side surface and a convex image-side surface; The fifth lens with positive optical power has a convex object-side surface; A sixth lens with negative optical power, its image-side surface being concave; and The seventh lens, which has positive optical power, has a convex object-side surface; The optical lens has seven lenses with optical power. The optical power of the cemented doublet lens formed by cementing the second lens and the third lens 23 and the total optical power of the optical lens Satisfy: -0.25≤ twenty three / ≤0; The radius of curvature R11 of the object side of the first lens, the radius of curvature R12 of the image side of the first lens, and the center thickness d1 of the first lens on the optical axis satisfy: 1.346≤R11 / (R12+d1)≤2.1; The effective focal length F1 of the first lens and the total effective focal length F of the optical lens satisfy: 1.8≤|F1 / F|≤2.

393.

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

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

4. The optical lens according to claim 1, characterized in that, The object-side surface of the third lens is either convex or concave.

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

6. The optical lens according to claim 1, characterized in that, The object-side surface of the sixth lens is convex.

7. The optical lens according to claim 1, characterized in that, The image-side surface of the seventh lens is either convex or concave.

8. The optical lens according to claim 1, characterized in that, The first lens, the fourth lens, and the seventh lens have at least two aspherical mirror surfaces.

9. The optical lens according to any one of claims 1-8, characterized in that, The radius of curvature R52 of the image side surface of the fifth lens and the total effective focal length F of the optical lens satisfy: R52 / F≥0.

5.

10. The optical lens according to any one of claims 1-8, characterized in that, The radius of curvature R52 of the image side surface of the fifth lens and the total effective focal length F of the optical lens satisfy: R52 / F≥0.

7.

11. The optical lens according to any one of claims 1-8, characterized in that, The image height H corresponding to the maximum field of view of the optical lens, the total effective focal length F of the optical lens, and the maximum field of view θ of the optical lens in radians satisfy: |(HF×θ) / (F×θ)|≤1.

5.

12. The optical lens according to any one of claims 1-8, characterized in that, The image height H corresponding to the maximum field of view of the optical lens, the total effective focal length F of the optical lens, and the maximum field of view θ of the optical lens in radians satisfy: |(HF×θ) / (F×θ)|≤1.

13. The optical lens according to any one of claims 1-8, characterized in that, The center thickness d7 of the seventh lens on the optical axis and the center thickness d567 of the three-layer cemented lens formed by cementing the fifth lens, the sixth lens and the seventh lens on the optical axis satisfy the following condition: 0.36≤d7 / d567≤0.

478.

14. The optical lens according to any one of claims 1-8, characterized in that, The maximum field of view (FOV) of the optical lens, the maximum aperture D of the object side of the first lens corresponding to the maximum field of view of the optical lens, and the image height H corresponding to the maximum field of view of the optical lens satisfy: 3.6 ≤ (D × 180°) / (H × FOV) ≤ 14.

4.

15. The optical lens according to any one of claims 1-8, characterized in that, The maximum field of view (FOV) of the optical lens, the maximum aperture D of the object side of the first lens corresponding to the maximum field of view of the optical lens, and the image height H corresponding to the maximum field of view of the optical lens satisfy: 3.6 ≤ (D × 180°) / (H × FOV) ≤ 10.

8.

16. The optical lens according to any one of claims 1-8, characterized in that, The distance TTL from the center of the object side of the first lens to the imaging surface of the optical lens on the optical axis satisfies the following condition: 4.255≤TTL / F≤5.

5.

17. The optical lens according to any one of claims 1-8, characterized in that, The distance TTL from the center of the object side of the first lens to the imaging surface of the optical lens on the optical axis, the maximum field of view (FOV) of the optical lens, and the image height H corresponding to the maximum field of view of the optical lens satisfy: 10.44≤(TTL×180°) / (H×FOV)≤14.

4.

18. The optical lens according to any one of claims 1-8, characterized in that, The distance BFL from the center of the image 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 object side of the first lens to the imaging surface of the optical lens on the optical axis satisfy: BFL / TTL≥0.

1.

19. The optical lens according to any one of claims 1-8, characterized in that, The effective focal length F2 of the second lens and the effective focal length F3 of the third lens satisfy: 0.4≤|F3 / F2|≤2.

5.

20. The optical lens according to any one of claims 1-8, characterized in that, The effective focal length F567 of the cemented triplet lens formed by the cementing of the fifth lens, the sixth lens, and the seventh lens satisfies the following condition with respect to the total effective focal length F of the optical lens: |F567 / F|≥1.

21. The optical lens according to any one of claims 1-8, characterized in that, The effective focal length F567 of the cemented triplet lens formed by the cementing of the fifth lens, the sixth lens, and the seventh lens satisfies the following condition with respect to the total effective focal length F of the optical lens: 1.5≤|F567 / F|≤3.

752.

22. The optical lens according to any one of claims 1-8, 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° ≤ (FOV × F) / H ≤ 62.168°.

23. The optical lens according to any one of claims 1-8, characterized in that, The center thickness d6 of the sixth lens on the optical axis and the center thickness d567 of the three-layer cemented lens formed by cementing the fifth lens, the sixth lens and the seventh lens on the optical axis satisfy the following condition: 0.069≤d6 / d567≤0.

12.

24. The optical lens according to any one of claims 1-8, characterized in that, The image height H corresponding to the maximum field of view of the optical lens, the total effective focal length F of the optical lens, and the maximum field of view θ of the optical lens in radians satisfy: 0.806≤(H / 2) / (F×tan(θ / 2))≤1.

00.

25. The optical lens according to any one of claims 1-8, characterized in that, The maximum aperture D of the first lens corresponding to the maximum field of view of the optical lens, the image height H corresponding to the maximum field of view of the optical lens, and the total effective focal length F of the optical lens satisfy: D / H / F≤0.3mm -1 .

26. The optical lens according to any one of claims 1-8, characterized in that, The maximum aperture D of the first lens corresponding to the maximum field of view of the optical lens, the image height H corresponding to the maximum field of view of the optical lens, and the total effective focal length F of the optical lens satisfy: 0.160mm -1 ≤D / H / F≤0.3mm -1 .

27. The optical lens according to any one of claims 1-8, characterized in that, The total effective focal length F of the optical lens, the maximum field of view θ of the optical lens in radians, and the maximum aperture D of the object side of the first lens corresponding to the maximum field of view of the optical lens satisfy: (F×θ) / D≥0.

5.

28. The optical lens according to any one of claims 1-8, characterized in that, The image height H corresponding to the maximum field of view of the optical lens, the maximum aperture D of the object side of the first lens corresponding to the maximum field of view of the optical lens, and the maximum field of view θ of the optical lens in radians satisfy: 1.122≤D / H / θ≤1.

8.

29. The optical lens according to any one of claims 1-8, characterized in that, The optical lens satisfies at least one of the following conditions: -0.24≤ 23 / ≤-0.085,3.782≤R52 / F≤6.311,0.042≤|(H-F×θ) / (F×θ)|≤0.084,1.346≤R11 / (R12+d1)≤1.794,0.393≤d7 / d567≤0.478,2.158≤|F1 / F|≤2.393,3.6≤(D×180°) / (H×FOV)≤3.78,4.255≤TTL / F≤4.543,10.44≤(TTL×180°) / (H×FOV)≤10.8,0.230≤BFL / TTL≤0.268,1.448≤|F3 / F2|≤2.065,1.448≤|F3 / F2|≤2.5,2.284≤|F567 / F|≤3.752,59.428°≤(FOV×F) / H≤62.168°,0.069≤d6 / d567≤0.105,0.806≤(H / 2) / (F×tan(θ / 2))≤0.843,0.160mm -1 ≤D / H / F≤0.180mm -1 ,0.734≤(F×θ) / D≤0.819,1.122≤D / H / θ≤1.203, in, 23 represents the optical power of the cemented doublet lens formed by cementing the second lens and the third lens together. R52 is the total optical power of the optical lens, R52 is the radius of curvature of the image-side surface of the fifth lens, F is the total effective focal length of the optical lens, H is the image height corresponding to the maximum field of view of the optical lens, θ is the maximum field of view of the optical lens in radians, R11 is the radius of curvature of the object-side surface of the first lens, R12 is the radius of curvature of the image-side surface of the first lens, d1 is the center thickness of the first lens on the optical axis, d7 is the center thickness of the seventh lens on the optical axis, d567 is the center thickness of the cemented triplet lens formed by the cementing of the fifth, sixth, and seventh lenses on the optical axis, and F1 is the first lens... The effective focal length of the lens, FOV is the maximum field of view of the optical lens, D is the maximum aperture of the object side of the first lens corresponding to the maximum field of view of the optical lens, TTL is the distance from the center of the object side of the first lens to the imaging plane of the optical lens on the optical axis, BFL is the distance from the center of the image side of the seventh lens to the imaging plane of the optical lens on the optical axis, F2 is the effective focal length of the second lens, F3 is the effective focal length of the third lens, F567 is the effective focal length of the cemented triplet lens formed by the cementing of the fifth lens, the sixth lens and the seventh lens, and d6 is the center thickness of the sixth lens on the optical axis.

30. An electronic device, characterized in that, It includes an optical lens according to any one of claims 1-29 and an imaging element for converting an optical image formed by the optical lens into an electrical signal.

Images