Optical Lens and Electronic Device

Abstract

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

Description

Technical Field

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

[0002] With the continuous development of optical lens technology, optical lenses are increasingly being used in a wide range of applications. For example, optical lenses play an irreplaceable role in a variety of fields, including smartphones, security surveillance, assisted driving, intelligent detection, and virtual reality. At the same time, lens manufacturers in various fields are actively investing in and improving the performance and technology of optical lenses to enhance the quality and competitiveness of their products.

[0003] Automotive lenses are key components for autonomous driving assistance systems to acquire external information. With the rapid development of these systems, larger, higher-resolution chips are required, placing increasing demands on the resolution of the lenses themselves. To achieve higher image quality, optical lenses often incorporate more elements, increasing their cost and significantly hindering their miniaturization. Furthermore, for driving safety reasons, automotive lenses used in autonomous driving applications require high stability and must be able to withstand a variety of harsh environments to avoid significant performance degradation in diverse environments, such as low-light conditions like rainy days and nighttime, or high and low-temperature environments. Therefore, the future development trends for automotive lenses are characterized by miniaturization, a small front-end diameter, minimal impact on lens resolution in high and low temperatures, a wide operating temperature range, a narrow field of view, a long focal length, minimal distortion, high central angular resolution, and high resolution. Summary of the Invention

[0004] The present application provides an optical lens, which includes, in order from a first side to a second side along an optical axis: a first lens having negative optical power, whose first side surface is convex and whose second side surface is concave; a second lens having negative optical power, whose first side surface is concave; a third lens having positive optical power, whose second side surface is convex; a fourth lens having positive optical power, whose first side surface is convex; a fifth lens having positive optical power, whose first side surface is convex and whose second side surface is convex; a sixth lens having negative optical power, whose first side surface is concave and whose second side surface is concave; and a seventh lens having positive optical power, whose first side surface is convex.

[0005] In one embodiment, the second side surface of the second lens is a convex surface.

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

[0007] In one embodiment, the first side surface of the third lens is a concave surface.

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

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

[0010] In one embodiment, the second side surface of the fourth lens is a concave surface.

[0011] In one embodiment, the second side surface of the seventh lens is concave.

[0012] In one embodiment, the second side surface of the seventh lens is a convex surface.

[0013] In one embodiment, the seventh lens has an aspherical surface.

[0014] In one embodiment, the second lens and the third lens are cemented together to form a cemented lens.

[0015] In one embodiment, the fifth lens and the sixth lens are cemented together to form a cemented lens.

[0016] In one embodiment, a distance TTL from the center of the first side surface of the first lens to the imaging plane of the optical lens on the optical axis and a total effective focal length F of the optical lens satisfy the following conditions: TTL / F≤4.

[0017] In one embodiment, a 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, an image height H corresponding to the maximum field of view of the optical lens, and a maximum field of view FOV of the optical lens satisfy the following conditions: TTL / H / FOV*180°≤32.4.

[0018] In one embodiment, the maximum field of view (FOV) of the optical lens satisfies: FOV≤52°.

[0019] In one embodiment, the maximum light clearance D of the first 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 maximum field of view FOV of the optical lens satisfy the following conditions: D / H / FOV*180°≤8.1.

[0020] In one embodiment, the maximum light clearance D of the first 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 radian value θ corresponding to the maximum field of view of the optical lens satisfy: D / H / θ≤2.5.

[0021] In one embodiment, a distance BFL from the center of the second side surface of the seventh lens to the imaging plane of the optical lens on the optical axis and a distance TTL from the center of the first side surface of the first lens to the imaging plane of the optical lens on the optical axis satisfy: BFL / TTL≥0.1.

[0022] In one embodiment, a curvature radius R1 of a first side surface of the first lens, a curvature radius R2 of a second side surface of the first lens, and a center thickness d1 of the first lens satisfy: 0.8≤R1 / (R2+d1)≤2.

[0023] In one embodiment, the total effective focal length F of the optical lens and the entrance pupil diameter ENPD of the optical lens satisfy: F / ENPD≤2.

[0024] In one embodiment, the image height H corresponding to the maximum field of view angle of the optical lens, the total effective focal length F of the optical lens, and the radian value θ corresponding to the maximum field of view angle of the optical lens satisfy: 0.5≤(H / 2) / (F*tan(θ / 2))≤1.5.

[0025] In one embodiment, the image height H corresponding to the maximum field of view angle of the optical lens, the total effective focal length F of the optical lens, and the radian value θ corresponding to the maximum field of view angle of the optical lens satisfy: |(HF*θ) / (F*θ)|≤0.1.

[0026] In one embodiment, the focal length F23 of the cemented lens formed by cementing the second lens and the third lens and the total effective focal length F of the optical lens satisfy: |F23 / F|≥5.

[0027] In one embodiment, the effective focal length F5 of the fifth lens and the effective focal length F6 of the sixth lens satisfy: 0.5≤|F5 / F6|≤2.

[0028] In one embodiment, the focal length F56 of the cemented lens formed by cementing the fifth lens and the sixth lens and the total effective focal length F of the optical lens satisfy: |F56 / F|≥2.

[0029] In one embodiment, the spacing distance d67 between the sixth lens and the seventh lens 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: d67 / TTL≥0.01.

[0030] In one embodiment, the vector height SAG71 of the first side surface of the seventh lens, the maximum clear aperture D71 of the first side surface of the seventh lens corresponding to the maximum field of view of the optical lens, the vector height SAG72 of the second side surface of the seventh lens, and the maximum clear aperture D72 of the second side surface of the seventh lens corresponding to the maximum field of view of the optical lens satisfy: 0.5≤(SAG71 / D71) / (SAG72 / D72)≤5.

[0031] In one embodiment, the effective focal length F7 of the seventh lens and the total effective focal length F of the optical lens satisfy: F7 / F≥1.8.

[0032] On the other hand, the present application provides an optical lens, which includes, in order from a first side to a second side along an optical axis: a first lens with negative optical power; a second lens with negative optical power; a third lens with positive optical power; a fourth lens with positive optical power; a fifth lens with positive optical power; a sixth lens with negative optical power; and a seventh lens with positive optical power; wherein a distance TTL from a center of a first side surface of the first lens to an imaging plane of the optical lens on the optical axis and a total effective focal length F of the optical lens satisfy the following conditions: TTL / F≤4.

[0033] In one embodiment, the first side surface of the first lens is convex, and the second side surface is concave.

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

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

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

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

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

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

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

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

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

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

[0044] In one embodiment, the seventh lens has an aspherical surface.

[0045] In one embodiment, the second lens and the third lens are cemented together to form a cemented lens.

[0046] In one embodiment, the fifth lens and the sixth lens are cemented together to form a cemented lens.

[0047] In one embodiment, a 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, an image height H corresponding to the maximum field of view of the optical lens, and a maximum field of view FOV of the optical lens satisfy the following conditions: TTL / H / FOV*180°≤32.4.

[0048] In one embodiment, the maximum field of view (FOV) of the optical lens satisfies: FOV≤52°.

[0049] In one embodiment, the maximum light clearance D of the first 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 maximum field of view FOV of the optical lens satisfy the following conditions: D / H / FOV*180°≤8.1.

[0050] In one embodiment, the maximum light clearance D of the first 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 radian value θ corresponding to the maximum field of view of the optical lens satisfy: D / H / θ≤2.5.

[0051] In one embodiment, a distance BFL from the center of the second side surface of the seventh lens to the imaging plane of the optical lens on the optical axis and a distance TTL from the center of the first side surface of the first lens to the imaging plane of the optical lens on the optical axis satisfy: BFL / TTL≥0.1.

[0052] In one embodiment, a curvature radius R1 of a first side surface of the first lens, a curvature radius R2 of a second side surface of the first lens, and a center thickness d1 of the first lens satisfy: 0.8≤R1 / (R2+d1)≤2.

[0053] In one embodiment, the total effective focal length F of the optical lens and the entrance pupil diameter ENPD of the optical lens satisfy: F / ENPD≤2.

[0054] In one embodiment, the image height H corresponding to the maximum field of view angle of the optical lens, the total effective focal length F of the optical lens, and the radian value θ corresponding to the maximum field of view angle of the optical lens satisfy: 0.5≤(H / 2) / (F*tan(θ / 2))≤1.5.

[0055] In one embodiment, the image height H corresponding to the maximum field of view angle of the optical lens, the total effective focal length F of the optical lens, and the radian value θ corresponding to the maximum field of view angle of the optical lens satisfy: |(HF*θ) / (F*θ)|≤0.1.

[0056] In one embodiment, the focal length F23 of the cemented lens formed by cementing the second lens and the third lens together and the total effective focal length F of the optical lens satisfy: |F23 / F|≥5.

[0057] In one embodiment, the effective focal length F5 of the fifth lens and the effective focal length F6 of the sixth lens satisfy: 0.5≤|F5 / F6|≤2.

[0058] In one embodiment, the focal length F56 of the cemented lens formed by cementing the fifth lens and the sixth lens and the total effective focal length F of the optical lens satisfy: |F56 / F|≥2.

[0059] In one embodiment, the spacing distance d67 between the sixth lens and the seventh lens 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: d67 / TTL≥0.01.

[0060] In one embodiment, the vector height SAG71 of the first side surface of the seventh lens, the maximum clear aperture D71 of the first side surface of the seventh lens corresponding to the maximum field of view of the optical lens, the vector height SAG72 of the second side surface of the seventh lens, and the maximum clear aperture D72 of the second side surface of the seventh lens corresponding to the maximum field of view of the optical lens satisfy: 0.5≤(SAG71 / D71) / (SAG72 / D72)≤5.

[0061] In one embodiment, the effective focal length F7 of the seventh lens and the total effective focal length F of the optical lens satisfy: F7 / F≥1.8.

[0062] Another aspect of the present application provides an electronic device comprising the optical lens provided by the present application and an imaging element for converting an optical image formed by the optical lens into an electrical signal.

[0063] This application uses seven lenses. By optimizing the shape and optical focal length of each lens, the optical lens has at least one beneficial effect, including miniaturization, small front port diameter, little impact on the resolution of the optical lens under high and low temperatures, a wide operating temperature range of the optical lens, a small field of view, a long focal length, small distortion, a large central angle resolution, high resolution, and can be used in conjunction with a DMD / LCOS chip for dynamic projection. BRIEF DESCRIPTION OF THE DRAWINGS

[0064] Other features, purposes and advantages of the present application will become more apparent through the following detailed description of the embodiments in conjunction with the accompanying drawings. In the accompanying drawings:

[0065] Figure 1 Schematic diagram showing the structure of an optical lens according to Example 1 of the present application;

[0066] Figure 2 Schematic diagram showing the structure of an optical lens according to Example 2 of the present application;

[0067] Figure 3 Schematic diagram showing the structure of an optical lens according to Example 3 of the present application;

[0068] Figure 4 Schematic diagram showing the structure of an optical lens according to Example 4 of the present application;

[0069] Figure 5 Schematic diagram showing the structure of an optical lens according to Example 5 of the present application;

[0070] Figure 6 Schematic diagram showing the structure of an optical lens according to Example 6 of the present application;

[0071] Figure 7 A schematic structural diagram of an optical lens according to Example 7 of the present application is shown; and

[0072] Figure 8 Schematic diagram showing the structure of an optical lens according to Example 8 of the present application. DETAILED DESCRIPTION

[0073] To facilitate understanding of the present application, a more comprehensive description of the present application will be provided below with reference to the accompanying drawings. It should be understood that these detailed descriptions are merely descriptions of exemplary embodiments of the present application and are not intended to limit the scope of the present 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.

[0074] It should be noted that in this specification, the terms "first," "second," "third," etc., are used solely to distinguish one feature from another and do not limit the features. Thus, the first lens discussed below could also be referred to as the second lens or the third lens without departing from the teachings of this application.

[0075] In the drawings, the thickness, size, and shape of the lenses are slightly exaggerated for ease of illustration. Specifically, the shapes of the spherical and aspherical surfaces shown in the drawings are provided by way of example. That is, the shapes of the spherical and aspherical surfaces are not limited to those shown in the drawings. The drawings are for illustration only and are not drawn strictly to scale.

[0076] In this article, the paraxial region refers to the area near the optical axis. If a lens surface is convex and the location of the convex surface is undefined, it means that the lens surface is convex at least in the paraxial region. If a lens surface is concave and the location of the concave surface is undefined, 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 image side is called the image-side surface of the lens.

[0077] It should be understood that the optical lens provided in this application can be used for both imaging and projection. When the optical lens provided in this application is used as an imaging lens, the "first side" referred to herein may refer to the object side, and the "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 "first side" referred to herein may refer to the imaging side, and the "second side" may refer to the image source side.

[0078] It should also be understood that the terms "comprises," "including," "having," "includes," and / or "comprising," when used in this specification, indicate the presence of the stated features, elements, and / or components, but do not preclude the presence or addition of one or more other features, elements, components, and / or combinations thereof. In addition, when expressions such as "at least one of..." appear after a list of listed features, they modify the entire list of features rather than modifying the individual elements in the list. In addition, when describing embodiments of the present application, "may" is used to mean "one or more embodiments of the present application." And, the term "exemplary" is intended to refer to an example or illustration.

[0079] Unless otherwise defined, all terms used herein (including technical and scientific terms) have the same meaning as commonly understood by those skilled in the art to which this application belongs. It should also be understood that terms (such as those defined in commonly used dictionaries) should be interpreted as having a meaning consistent with their meaning in the context of the relevant technology and will not be interpreted in an idealized or overly formal sense unless expressly defined as such herein.

[0080] It should be noted that, in the absence of conflict, the embodiments and features of the embodiments in this application can be combined with each other. The present application will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0081] The features, principles and other aspects of the present application are described in detail below.

[0082] In an exemplary embodiment, the optical lens includes, for example, seven lenses having 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, which are arranged in sequence from the first side to the second side along the optical axis.

[0083] In exemplary embodiments, the optical lens provided herein can be used, for example, as an automotive lens. In this case, the first side of the optical lens can be the object side, and the second side can be the image side. Light from the object side can form an image on the image side. The second side of the optical lens is the imaging surface of the optical lens.

[0084] In exemplary embodiments, the optical lens provided herein can be used, for example, as a projection lens or a laser radar transmitter lens. In this case, the second side of the optical lens can be the image source side, and the first side can be the imaging side. Light from the image source side can be imaged on the imaging side. The second side of the optical lens serves as the image source side of the optical lens.

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

[0086] In an exemplary embodiment, the first lens may have negative optical power, and the first side surface may be convex and the second side surface may be concave. This helps prevent excessive divergence of light from the first side surface, helps control the aperture of the rear lens, and achieves a miniaturized optical lens design. The convex first side surface helps prevent water droplets from sliding off in practical applications, minimizing their impact on imaging. Furthermore, the meniscus shape of the first lens facilitates the collection of light from a large field of view into the rear optical system, increasing light transmission and stabilizing the direction of light at large angles at the edges.

[0087] In an exemplary embodiment, the second lens may have negative optical power, and the second lens may have a first side surface that may be concave, and a second side surface that may be convex or concave, which is conducive to smooth transition of light.

[0088] In an exemplary embodiment, the third lens may have positive optical power, and the first side surface of the third lens may be concave or convex, and the second side surface may be convex, which is conducive to light convergence, smooth transition of light trend and improved resolution.

[0089] In an exemplary embodiment, the fourth lens may have positive optical power, and the first side surface of the fourth lens may be convex, and the second side surface may be convex or concave, which is conducive to light convergence, compressing the angle of the incident light, and achieving a smooth transition of light to the rear lens, which is conducive to reducing the aperture of the rear lens; and the second side surface is convex and has a meniscus shape, which is conducive to light convergence and a smooth transition of light.

[0090] In an exemplary embodiment, the fifth lens may have positive optical power, and the first side surface of the fifth lens may be convex and the second side surface may be convex, which is beneficial to further reduce field curvature and correct the aberration of the optical lens.

[0091] In an exemplary embodiment, the sixth lens element may have negative optical power and may have a first side surface and a second side surface that are concave, facilitating a smooth transition of light. Furthermore, the sixth lens element and the fifth lens element have a similar focal length ratio, facilitating stable imaging in high and low temperature environments.

[0092] In an exemplary embodiment, the seventh lens element may have positive refractive power, and the first side surface of the seventh lens element may be convex, while the second side surface may be concave. This facilitates a smooth transition of peripheral light at large angles to the rear optical system, corrects astigmatism and field curvature of the optical lens, and improves the resolving power of the optical lens. Alternatively, the second side surface may be convex, further facilitating a smooth transition of light to the rear optical system.

[0093] In an exemplary embodiment, the seventh lens element may have an aspherical surface, which is beneficial for correcting field curvature and improving the resolving power of the optical lens.

[0094] In an exemplary embodiment, the second lens and the third lens can be glued together to form a glued lens, which is beneficial to reducing the air gap between the two lenses and miniaturizing the optical lens; reducing the number of steps and reducing costs; reducing tolerance sensitivity issues such as tilt / eccentricity generated by the lenses during the assembly process; reducing light loss caused by reflection between lenses and improving illumination; reducing chromatic aberration to a certain extent, and also allowing some chromatic aberration to remain to balance the chromatic aberration of the optical lens.

[0095] In an exemplary embodiment, the fifth lens and the sixth lens can be cemented to form a cemented lens, which is beneficial for the optical lens to ensure a higher resolution while eliminating ghost images; make the light transition smoothly, and improve the resolving power of the optical lens; correct the aberration of the optical lens, improve the resolution, and optimize optical properties such as distortion and CRA; reduce the number of processes and overall weight, and reduce costs; reduce the loss of light caused by reflection between lenses, and improve illumination; help reduce the air gap between the two lenses, and miniaturize the optical lens; and can reduce tolerance sensitivity problems such as tilt / eccentricity generated by the lens during the assembly process.

[0096] In an exemplary embodiment, the optical lens according to the present application may satisfy the following relationship: TTL / F ≤ 4, where TTL is the distance on the optical axis from the center of the first side surface of the first lens element to the imaging plane of the optical lens, and F is the total effective focal length of the optical lens. This relationship helps limit lens length and achieve miniaturization. More specifically, TTL and F may further satisfy the following relationship: TTL / F ≤ 3.7.

[0097] In an exemplary embodiment, the optical lens according to the present application may satisfy the following conditions: TTL / H / FOV*180°≤32.4, where TTL is the distance from the center of the first side surface of the first lens element to the imaging plane of the optical lens on the optical axis, FOV is the maximum field of view of the optical lens, and H is the image height corresponding to the maximum field of view of the optical lens. This condition facilitates miniaturization of the optical lens. More specifically, TTL, H, and FOV may further satisfy the following conditions: TTL / H / FOV*180°≤27.

[0098] In an exemplary embodiment, the optical lens according to the present application may satisfy the following requirements: FOV ≤ 52°, where FOV is the maximum field of view of the optical lens. Meeting the requirement of FOV ≤ 52° helps reduce the field of view of the optical lens. More specifically, the FOV may further satisfy the following requirements: FOV ≤ 48°.

[0099] In an exemplary embodiment, the optical lens according to the present application may satisfy the following conditions: D / H / FOV*180°≤8.1, where D is the maximum clear aperture of the first side surface of the first lens corresponding to the maximum field of view of the optical lens, H is the image height corresponding to the maximum field of view of the optical lens, and FOV is the maximum field of view of the optical lens. This condition facilitates a small front port diameter and miniaturization of the optical lens. More specifically, D, H, and FOV may further satisfy the following conditions: D / H / FOV*180°≤7.56.

[0100] In an exemplary embodiment, the optical lens according to the present application may satisfy the following conditions: D / H / θ ≤ 2.5, where D is the maximum clear aperture of the first side surface of the first lens corresponding to the maximum field of view of the optical lens, H is the image height corresponding to the maximum field of view of the optical lens, and θ is the arc value corresponding to the maximum field of view of the optical lens. This condition facilitates a small front port diameter and miniaturization of the optical lens. More specifically, D, H, and θ may further satisfy the following conditions: D / H / θ ≤ 2.3.

[0101] In an exemplary embodiment, the optical lens according to the present application may satisfy the following relationship: BFL / TTL ≥ 0.1, where BFL is the distance on the optical axis from the center of the second side surface of the seventh lens element 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 element to the imaging plane of the optical lens. This requirement of BFL / TTL ≥ 0.1 facilitates miniaturization while miniaturizing the lens, facilitating assembly of the optical lens and avoiding interference. More specifically, BFL and TTL may further satisfy the following relationship: BFL / TTL ≥ 0.15.

[0102] In an exemplary embodiment, the optical lens according to the present application may satisfy the following conditions: 0.8≤R1 / (R2+d1)≤2, where R1 is the radius of curvature of the first side surface of the first lens, R2 is the radius of curvature of the second side surface of the first lens, and d1 is the center thickness of the first lens. The optical lens satisfies the following conditions: 0.8≤R1 / (R2+d1)≤2, which is beneficial for creating an optical path difference between the peripheral light and the central light, diverging the central light and allowing it to enter the rear optical system, thereby reducing the field of view of the optical lens, reducing the front port diameter, and achieving miniaturization of the optical lens. R1, R2, and d1 may further satisfy the following conditions: 1≤R1 / (R2+d1)≤1.8.

[0103] In an exemplary embodiment, the optical lens according to the present application may satisfy the following relationship: F / ENPD ≤ 2, where F is the total effective focal length of the optical lens and ENPD is the entrance pupil diameter of the optical lens. This relationship facilitates achieving a large aperture and high light throughput. More specifically, F and ENPD may further satisfy the following relationship: F / ENPD ≤ 1.8.

[0104] In an exemplary embodiment, the optical lens according to the present application may satisfy the following conditions: 0.5 ≤ (H / 2) / (F * tan (θ / 2)) ≤ 1.5, where H is the image height corresponding to the maximum field of view angle of the optical lens, F is the total effective focal length of the optical lens, and θ is the radian value corresponding to the maximum field of view angle of the optical lens. The optical lens satisfies the following conditions: 0.5 ≤ (H / 2) / (F * tan (θ / 2)) ≤ 1.5, which facilitates achieving high angular resolution of the optical lens. More specifically, H, F, and θ may further satisfy the following conditions: 0.7 ≤ (H / 2) / (F * tan (θ / 2)) ≤ 1.2.

[0105] In an exemplary embodiment, the optical lens according to the present application may satisfy the following condition: |(HF*θ) / (F*θ)|≤0.1, 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 arc value corresponding to the maximum field of view of the optical lens. This condition helps ensure that the focal length of the optical lens is increased while maintaining the same field of view and imaging surface size, thereby emphasizing the imaging effect in the central area of the optical lens imaging surface and further achieving high angular resolution and low distortion for the optical lens. More specifically, H, F, and θ may further satisfy the following condition: |(HF*θ) / (F*θ)|≤0.08.

[0106] In an exemplary embodiment, the optical lens according to the present application may satisfy the following relationship: |F23 / F| ≥ 5, where F23 is the focal length of the cemented lens formed by the second and third lenses, and F is the total effective focal length of the optical lens. This relationship helps control the light distribution between the first and fourth lenses, reducing aberrations caused by wide-angle light entering through the first lens. It also makes the lens structure more compact, facilitating miniaturization of the optical lens. More specifically, F23 and F may further satisfy the following relationship: |F23 / F| ≥ 6.

[0107] In an exemplary embodiment, the optical lens according to the present application may satisfy the following relationship: 0.5 ≤ |F5 / F6| ≤ 2, where F5 is the effective focal length of the fifth lens element, and F6 is the effective focal length of the sixth lens element. This 0.5 ≤ |F5 / F6| ≤ 2 relationship facilitates smooth light transitions, corrects chromatic aberration, enhances the optical lens's resolution, and improves image quality. More specifically, F5 and F6 may further satisfy the following relationship: 0.8 ≤ |F5 / F6| ≤ 1.7.

[0108] In an exemplary embodiment, the optical lens according to the present application may satisfy the following relationship: |F56 / F| ≥ 2, where F56 is the focal length of the cemented lens formed by the fifth and sixth lenses, and F is the total effective focal length of the optical lens. This relationship, along with the rational distribution of the focal lengths of the cemented components, improves thermal compensation and enhances temperature performance. More specifically, F56 and F may further satisfy the following relationship: |F56 / F| ≥ 3.

[0109] In an exemplary embodiment, the optical lens according to the present application may satisfy the following relationship: d67 / TTL ≥ 0.01, where d67 is the distance between the sixth and seventh lens elements, and TTL is the distance on the optical axis from the center of the first side surface of the first lens element to the imaging plane of the optical lens. This d67 / TTL ≥ 0.01 requirement facilitates assembly and reduces ghost images. More specifically, d67 and TTL may further satisfy the following relationship: d67 / TTL ≥ 0.015.

[0110] In an exemplary embodiment, the optical lens according to the present application may satisfy the following: 0.5≤(SAG71 / D71) / (SAG72 / D72)≤5, wherein SAG71 is the sag of the first side surface of the seventh lens, D71 is the maximum clear aperture of the first side surface of the seventh lens corresponding to the maximum field of view of the optical lens, SAG72 is the sag of the second side surface of the seventh lens, and D72 is the maximum clear aperture of the second side surface of the seventh lens corresponding to the maximum field of view of the optical lens. The optical lens satisfies 0.5≤(SAG71 / D71) / (SAG72 / D72)≤5, making the shapes of the first and second side surfaces of the seventh lens similar, which is conducive to a smooth transition of peripheral light and reducing the sensitivity of the optical lens. More specifically, SAG71, D71, SAG72, and D72 may further satisfy the following: 0.6≤(SAG71 / D71) / (SAG72 / D72)≤4.8.

[0111] In an exemplary embodiment, the optical lens according to the present application may satisfy the following relationship: F7 / F ≥ 1.8, where F7 is the effective focal length of the seventh lens element, and F is the total effective focal length of the optical lens. This relationship allows for a reasonable distribution of lens focal lengths, improves lens thermal compensation, and balances optical lens aberrations. More specifically, F7 and F may further satisfy the following relationship: F7 / F ≥ 2.

[0112] In an exemplary embodiment, the first to seventh lenses may be spherical lenses or aspherical lenses. For example, the seventh lens may be an aspherical lens, which is beneficial for correcting field curvature and improving resolution.

[0113] In an exemplary embodiment, a light beam limiting aperture may be positioned between the fourth and fifth lenses to further effectively converge the light entering the optical system, reduce the lens aperture at the rear end of the optical lens, and lower the sensitivity of the optical lens. However, it should be noted that the aperture position disclosed herein is merely illustrative and not limiting; in alternative embodiments, the aperture may be positioned elsewhere as needed.

[0114] In an exemplary embodiment, as needed, the optical lens of the present application may further include a filter disposed between the protective glass and the imaging surface to filter light with different wavelengths and prevent damage to the second side element (e.g., chip) of the optical lens.

[0115] According to the above-mentioned embodiment of the present application, the optical lens realizes at least one beneficial effect of miniaturization, small front port diameter, small influence on lens resolution at high and low temperatures, wide operating temperature range, small field of view angle, long focal length, small distortion, large central angle resolution and high resolution through the reasonable setting of each lens shape and optical focal length.

[0116] However, those skilled in the art will appreciate that the number of lenses comprising the lens system can be varied to achieve the various results and advantages described herein without departing from the claimed technical solutions. For example, while the embodiments describe an optical lens system comprising seven lenses, the optical lens system is not limited to seven lenses. If desired, the optical lens system can also include other numbers of lenses.

[0117] Specific embodiments of the optical lens applicable to the above-mentioned embodiments will be further described below with reference to the accompanying drawings.

[0118] Example 1

[0119] The following reference Figure 1 An optical lens according to Example 1 of the present application is described. Figure 1 A schematic structural diagram of an optical lens according to Example 1 of the present application is shown.

[0120] like Figure 1 As shown, the optical lens includes, from the first side to the second side along the optical axis, a first lens L1, a second lens L2, a third lens L3, a fourth lens L4, a fifth lens L5, a sixth lens L6 and a seventh lens L7.

[0121] The first lens L1 is a convex-concave lens with negative optical power, whose first side surface S1 is convex and whose second side surface S2 is concave. The second lens L2 is a convex-concave lens with negative optical power, whose first side surface S3 is concave and whose second side surface S4 is convex. The third lens L3 is a convex-concave lens with positive optical power, whose first side surface S4 is concave and whose second side surface S5 is convex. The fourth lens L4 is a convex-convex lens with positive optical power, whose first side surface S6 is convex and whose second side surface S7 is convex. The fifth lens L5 is a convex-convex lens with positive optical power, whose first side surface S9 is convex and whose second side surface S10 is convex. The sixth lens L6 is a convex-concave lens with negative optical power, whose first side surface S10 is concave and whose second side surface S11 is concave. The seventh lens L7 is a convex-concave lens with positive optical power, whose first side surface S12 is convex and whose second side surface S13 is concave.

[0122] The optical lens may further include an aperture STO, which may be disposed between the fourth lens element L4 and the fifth lens element L5 to improve imaging quality. For example, the aperture STO may be disposed between the fourth lens element L4 and the fifth lens element L5 at a position close to the second side surface of the fourth lens element L4.

[0123] For example, the optical lens may further include auxiliary lenses L8 and L9 with no optical power. Auxiliary lens L8 may have a first side surface S14 and a second side surface S15, and auxiliary lens L9 may have a first side surface S16 and a second side surface S17. Optionally, auxiliary lenses L8 and L9 may be filters or protective glass. Filters may be used to correct color deviation. Protective glass may be used to protect the image sensor chip IMA located on the imaging surface (not shown).

[0124] The optical lens provided in this application can be used, for example, as an automotive lens. In this case, light from an object sequentially passes through each surface S1 to S17 and is ultimately imaged on an imaging surface, where an image sensor chip IMA is disposed. It should be understood that the optical lens provided in this application can also be used, for example, as a projection lens or a laser radar transmitter lens. In this case, light from the image source side sequentially passes through each surface S17 to S1 and is ultimately projected onto a projection surface (not shown) disposed on the first side, where an image sensor chip IMA is disposed.

[0125] Table 1 shows the curvature radius 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 Nd, and Abbe number Vd of each lens of the optical lens of Example 1.

[0126]

[0127]

[0128] Table 1

[0129] In Example 1, the first side surface S12 and the second side surface S13 of the seventh lens L7 may be aspherical surfaces. The surface shape x of each aspherical lens may be defined by, but not limited to, the following aspherical surface formula:

[0130]

[0131] Where x is the distance vector from the vertex of the aspheric surface at a height of h along the optical axis; c is the paraxial curvature of the aspheric surface, c = 1 / R (i.e., the paraxial curvature c is the reciprocal of the radius of curvature R in Table 1 above); k is the conic coefficient; Ai is the correction coefficient for the i-th order of the aspheric surface. Table 2 below lists the conic coefficient k and the higher-order coefficients A4, A6, A8, A10, A12, A14, and A16 that can be used for each aspheric mirror surface S12 and S13 in Example 1.

[0132] Face number k A4 A6 A8 S12 -0.1000 1.2657E-04 1.3706E-04 -4.8423E-05 S13 -13.2098 1.6203E-03 3.2475E-04 -1.1533E-04 Face number A10 A12 A14 A16 S12 8.3301E-06 -8.5328E-07 4.6337E-08 -1.0431E-09 S13 1.9147E-05 -2.0349E-06 1.1532E-07 -2.7262E-09

[0133] Table 2

[0134] Example 2

[0135] The following reference Figure 2 The optical lens according to Example 2 of the present application is described. In this embodiment and the following embodiments, some descriptions similar to those in Example 1 will be omitted for the sake of brevity. Figure 2 A schematic structural diagram of an optical lens according to Example 2 of the present application is shown.

[0136] like Figure 2 As shown, the optical lens includes, from the first side to the second side along the optical axis, a first lens L1, a second lens L2, a third lens L3, a fourth lens L4, a fifth lens L5, a sixth lens L6 and a seventh lens L7.

[0137] The first lens L1 is a convex-concave lens with negative optical power, whose first side surface S1 is convex and whose second side surface S2 is concave. The second lens L2 is a convex-concave lens with negative optical power, whose first side surface S3 is concave and whose second side surface S4 is convex. The third lens L3 is a convex-concave lens with positive optical power, whose first side surface S4 is concave and whose second side surface S5 is convex. The fourth lens L4 is a convex-convex lens with positive optical power, whose first side surface S6 is convex and whose second side surface S7 is convex. The fifth lens L5 is a convex-convex lens with positive optical power, whose first side surface S9 is convex and whose second side surface S10 is convex. The sixth lens L6 is a convex-concave lens with negative optical power, whose first side surface S10 is concave and whose second side surface S11 is concave. The seventh lens L7 is a convex-concave lens with positive optical power, whose first side surface S12 is convex and whose second side surface S13 is concave.

[0138] The optical lens may further include an aperture STO, which may be disposed between the fourth lens element L4 and the fifth lens element L5 to improve imaging quality. For example, the aperture STO may be disposed between the fourth lens element L4 and the fifth lens element L5 at a position close to the second side surface of the fourth lens element L4.

[0139] For example, the optical lens may further include auxiliary lenses L8 and L9 with no optical power. Auxiliary lens L8 may have a first side surface S14 and a second side surface S15, and auxiliary lens L9 may have a first side surface S16 and a second side surface S17. Optionally, auxiliary lenses L8 and L9 may be filters or protective glass. Filters may be used to correct color deviation. Protective glass may be used to protect the image sensor chip IMA located on the imaging surface (not shown).

[0140] The optical lens provided in this application can be used, for example, as an automotive lens. In this case, light from an object sequentially passes through each surface S1 to S17 and is ultimately imaged on an imaging surface, where an image sensor chip IMA is disposed. It should be understood that the optical lens provided in this application can also be used, for example, as a projection lens or a laser radar transmitter lens. In this case, light from the image source side sequentially passes through each surface S17 to S1 and is ultimately projected onto a projection surface (not shown) disposed on the first side, where an image sensor chip IMA is disposed.

[0141] Table 3 shows the radius of curvature R, thickness / distance d, refractive index Nd, and Abbe number Vd of each lens of the optical lens of Example 2. Table 4 shows the conic coefficient and high-order coefficient of each aspheric mirror surface that can be used in Example 2, wherein the surface shape of each aspheric surface can be defined by formula (1) given in Example 1 above.

[0142]

[0143] Table 3

[0144]

[0145]

[0146] Table 4

[0147] Example 3

[0148] The following reference Figure 3 An optical lens according to Example 3 of the present application is described. Figure 3 A schematic structural diagram of an optical lens according to Example 3 of the present application is shown.

[0149] like Figure 3 As shown, the optical lens includes, from the first side to the second side along the optical axis, a first lens L1, a second lens L2, a third lens L3, a fourth lens L4, a fifth lens L5, a sixth lens L6 and a seventh lens L7.

[0150] The first lens L1 is a convex-concave lens with negative optical power, whose first side surface S1 is convex and whose second side surface S2 is concave. The second lens L2 is a convex-concave lens with negative optical power, whose first side surface S3 is concave and whose second side surface S4 is concave. The third lens L3 is a convex-convex lens with positive optical power, whose first side surface S4 is convex and whose second side surface S5 is convex. The fourth lens L4 is a convex-convex lens with positive optical power, whose first side surface S6 is convex and whose second side surface S7 is convex. The fifth lens L5 is a convex-convex lens with positive optical power, whose first side surface S9 is convex and whose second side surface S10 is convex. The sixth lens L6 is a convex-concave lens with negative optical power, whose first side surface S10 is concave and whose second side surface S11 is concave. The seventh lens L7 is a convex-concave lens with positive optical power, whose first side surface S12 is convex and whose second side surface S13 is concave.

[0151] The optical lens may further include an aperture STO, which may be disposed between the fourth lens element L4 and the fifth lens element L5 to improve imaging quality. For example, the aperture STO may be disposed between the fourth lens element L4 and the fifth lens element L5 at a position close to the second side surface of the fourth lens element L4.

[0152] For example, the optical lens may further include auxiliary lenses L8 and L9 with no optical power. Auxiliary lens L8 may have a first side surface S14 and a second side surface S15, and auxiliary lens L9 may have a first side surface S16 and a second side surface S17. Optionally, auxiliary lenses L8 and L9 may be filters or protective glass. Filters may be used to correct color deviation. Protective glass may be used to protect the image sensor chip IMA located on the imaging surface (not shown).

[0153] The optical lens provided in this application can be used, for example, as an automotive lens. In this case, light from an object sequentially passes through each surface S1 to S17 and is ultimately imaged on an imaging surface, where an image sensor chip IMA is disposed. It should be understood that the optical lens provided in this application can also be used, for example, as a projection lens or a laser radar transmitter lens. In this case, light from the image source side sequentially passes through each surface S17 to S1 and is ultimately projected onto a projection surface (not shown) disposed on the first side, where an image sensor chip IMA is disposed.

[0154] Table 5 shows the radius of curvature R, thickness / distance d, refractive index Nd, and Abbe number Vd of each lens of the optical lens of Example 3. Table 6 shows the conic coefficient and high-order coefficient of each aspheric mirror surface that can be used in Example 3, wherein the surface shape of each aspheric surface can be defined by formula (1) given in Example 1 above.

[0155]

[0156]

[0157] Table 5

[0158] Face number k A4 A6 A8 S12 -0.4682 1.1749E-04 1.9420E-07 -1.0299E-05 S13 5.9272 1.2495E-03 -5.5528E-05 1.2567E-05 Face number A10 A12 A14 A16 S12 1.7883E-06 -2.1462E-07 1.1885E-08 -2.4772E-10 S13 -3.1161E-06 4.2994E-07 -2.8157E-08 8.1409E-10

[0159] Table 6

[0160] Example 4

[0161] The following reference Figure 4 An optical lens according to Example 4 of the present application is described. Figure 4 A schematic structural diagram of an optical lens according to Example 4 of the present application is shown.

[0162] like Figure 4 As shown, the optical lens includes, from the first side to the second side along the optical axis, a first lens L1, a second lens L2, a third lens L3, a fourth lens L4, a fifth lens L5, a sixth lens L6 and a seventh lens L7.

[0163] The first lens L1 is a convex-concave lens with negative optical power, whose first side surface S1 is convex and whose second side surface S2 is concave. The second lens L2 is a convex-concave lens with negative optical power, whose first side surface S3 is concave and whose second side surface S4 is concave. The third lens L3 is a convex-convex lens with positive optical power, whose first side surface S4 is convex and whose second side surface S5 is convex. The fourth lens L4 is a convex-convex lens with positive optical power, whose first side surface S6 is convex and whose second side surface S7 is convex. The fifth lens L5 is a convex-convex lens with positive optical power, whose first side surface S9 is convex and whose second side surface S10 is convex. The sixth lens L6 is a convex-concave lens with negative optical power, whose first side surface S10 is concave and whose second side surface S11 is concave. The seventh lens L7 is a convex-concave lens with positive optical power, whose first side surface S12 is convex and whose second side surface S13 is concave.

[0164] The optical lens may further include an aperture STO, which may be disposed between the fourth lens element L4 and the fifth lens element L5 to improve imaging quality. For example, the aperture STO may be disposed between the fourth lens element L4 and the fifth lens element L5 at a position close to the second side surface of the fourth lens element L4.

[0165] For example, the optical lens may further include auxiliary lenses L8 and L9 with no optical power. Auxiliary lens L8 may have a first side surface S14 and a second side surface S15, and auxiliary lens L9 may have a first side surface S16 and a second side surface S17. Optionally, auxiliary lenses L8 and L9 may be filters or protective glass. Filters may be used to correct color deviation. Protective glass may be used to protect the image sensor chip IMA located on the imaging surface (not shown).

[0166] The optical lens provided in this application can be used, for example, as an automotive lens. In this case, light from an object sequentially passes through each surface S1 to S17 and is ultimately imaged on an imaging surface, where an image sensor chip IMA is disposed. It should be understood that the optical lens provided in this application can also be used, for example, as a projection lens or a laser radar transmitter lens. In this case, light from the image source side sequentially passes through each surface S17 to S1 and is ultimately projected onto a projection surface (not shown) disposed on the first side, where an image sensor chip IMA is disposed.

[0167] Table 7 shows the radius of curvature R, thickness / distance d, refractive index Nd, and Abbe number Vd of each lens of the optical lens of Example 4. Table 8 shows the conic coefficient and high-order coefficient of each aspheric mirror surface that can be used in Example 4, wherein the surface shape of each aspheric surface can be defined by formula (1) given in Example 1 above.

[0168]

[0169] Table 7

[0170]

[0171]

[0172] Table 8

[0173] Example 5

[0174] The following reference Figure 5 An optical lens according to Example 5 of the present application is described. Figure 5 A structural schematic diagram of an optical lens according to Example 5 of the present application is shown.

[0175] like Figure 5 As shown, the optical lens includes, from the first side to the second side along the optical axis, a first lens L1, a second lens L2, a third lens L3, a fourth lens L4, a fifth lens L5, a sixth lens L6 and a seventh lens L7.

[0176] The first lens L1 is a convex-concave lens with negative optical power, whose first side surface S1 is convex and whose second side surface S2 is concave. The second lens L2 is a convex-concave lens with negative optical power, whose first side surface S3 is concave and whose second side surface S4 is concave. The third lens L3 is a convex-convex lens with positive optical power, whose first side surface S4 is convex and whose second side surface S5 is convex. The fourth lens L4 is a convex-concave lens with positive optical power, whose first side surface S6 is convex and whose second side surface S7 is concave. The fifth lens L5 is a convex-convex lens with positive optical power, whose first side surface S9 is convex and whose second side surface S10 is convex. The sixth lens L6 is a convex-concave lens with negative optical power, whose first side surface S10 is concave and whose second side surface S11 is concave. The seventh lens L7 is a convex-concave lens with positive optical power, whose first side surface S12 is convex and whose second side surface S13 is concave. Also, the first side surface S12 and the second side surface S13 of the seventh lens L7 have at least one inflection point.

[0177] The optical lens may further include an aperture STO, which may be disposed between the fourth lens element L4 and the fifth lens element L5 to improve imaging quality. For example, the aperture STO may be disposed between the fourth lens element L4 and the fifth lens element L5 at a position close to the second side surface of the fourth lens element L4.

[0178] For example, the optical lens may further include auxiliary lenses L8 and L9 with no optical power. Auxiliary lens L8 may have a first side surface S14 and a second side surface S15, and auxiliary lens L9 may have a first side surface S16 and a second side surface S17. Optionally, auxiliary lenses L8 and L9 may be filters or protective glass. Filters may be used to correct color deviation. Protective glass may be used to protect the image sensor chip IMA located on the imaging surface (not shown).

[0179] The optical lens provided in this application can be used, for example, as an automotive lens. In this case, light from an object sequentially passes through each surface S1 to S17 and is ultimately imaged on an imaging surface, where an image sensor chip IMA is disposed. It should be understood that the optical lens provided in this application can also be used, for example, as a projection lens or a laser radar transmitter lens. In this case, light from the image source side sequentially passes through each surface S17 to S1 and is ultimately projected onto a projection surface (not shown) disposed on the first side, where an image sensor chip IMA is disposed.

[0180] Table 9 shows the radius of curvature R, thickness / distance d, refractive index Nd, and Abbe number Vd of each lens of the optical lens of Example 5. Table 10 shows the conic coefficient and high-order coefficient of each aspheric mirror surface that can be used in Example 5, wherein the surface shape of each aspheric surface can be defined by formula (1) given in Example 1 above.

[0181]

[0182]

[0183] Table 9

[0184] Face number k A4 A6 A8 S12 -5.8564 -9.0874E-04 -1.4158E-06 -2.3046E-05 S13 94.0549 -2.8962E-04 7.4534E-05 -5.9853E-05 Face number A10 A12 A14 A16 S12 4.3860E-06 -4.9766E-07 2.9753E-08 -7.5975E-10 S13 1.4515E-05 -2.0346E-06 1.5049E-07 -4.9889E-09

[0185] Table 10

[0186] Example 6

[0187] The following reference Figure 6 An optical lens according to Example 6 of the present application is described. Figure 6 A structural schematic diagram of an optical lens according to Example 6 of the present application is shown.

[0188] like Figure 6 As shown, the optical lens includes, from the first side to the second side along the optical axis, a first lens L1, a second lens L2, a third lens L3, a fourth lens L4, a fifth lens L5, a sixth lens L6 and a seventh lens L7.

[0189] The first lens L1 is a convex-concave lens with negative optical power, whose first side surface S1 is convex and whose second side surface S2 is concave. The second lens L2 is a convex-concave lens with negative optical power, whose first side surface S3 is concave and whose second side surface S4 is concave. The third lens L3 is a convex-convex lens with positive optical power, whose first side surface S4 is convex and whose second side surface S5 is convex. The fourth lens L4 is a convex-concave lens with positive optical power, whose first side surface S6 is convex and whose second side surface S7 is concave. The fifth lens L5 is a convex-convex lens with positive optical power, whose first side surface S9 is convex and whose second side surface S10 is convex. The sixth lens L6 is a convex-concave lens with negative optical power, whose first side surface S10 is concave and whose second side surface S11 is concave. The seventh lens L7 is a convex-concave lens with positive optical power, whose first side surface S12 is convex and whose second side surface S13 is concave. Also, the first side surface S12 and the second side surface S13 of the seventh lens L7 have at least one inflection point.

[0190] The optical lens may further include an aperture STO, which may be disposed between the fourth lens element L4 and the fifth lens element L5 to improve imaging quality. For example, the aperture STO may be disposed between the fourth lens element L4 and the fifth lens element L5 at a position close to the second side surface of the fourth lens element L4.

[0191] For example, the optical lens may further include auxiliary lenses L8 and L9 with no optical power. Auxiliary lens L8 may have a first side surface S14 and a second side surface S15, and auxiliary lens L9 may have a first side surface S16 and a second side surface S17. Optionally, auxiliary lenses L8 and L9 may be filters or protective glass. Filters may be used to correct color deviation. Protective glass may be used to protect the image sensor chip IMA located on the imaging surface (not shown).

[0192] The optical lens provided in this application can be used, for example, as an automotive lens. In this case, light from an object sequentially passes through each surface S1 to S17 and is ultimately imaged on an imaging surface, where an image sensor chip IMA is disposed. It should be understood that the optical lens provided in this application can also be used, for example, as a projection lens or a laser radar transmitter lens. In this case, light from the image source side sequentially passes through each surface S17 to S1 and is ultimately projected onto a projection surface (not shown) disposed on the first side, where an image sensor chip IMA is disposed.

[0193] Table 11 shows the radius of curvature R, thickness / distance d, refractive index Nd, and Abbe number Vd of each lens of the optical lens of Example 6. Table 12 shows the conic coefficient and high-order coefficient of each aspheric mirror surface that can be used in Example 6, wherein the surface shape of each aspheric surface can be defined by formula (1) given in Example 1 above.

[0194]

[0195] Table 11

[0196]

[0197]

[0198] Table 12

[0199] Example 7

[0200] The following reference Figure 7 An optical lens according to Example 7 of the present application is described. Figure 7 A structural schematic diagram of an optical lens according to Example 7 of the present application is shown.

[0201] like Figure 7 As shown, the optical lens includes, from the first side to the second side along the optical axis, a first lens L1, a second lens L2, a third lens L3, a fourth lens L4, a fifth lens L5, a sixth lens L6 and a seventh lens L7.

[0202] The first lens L1 is a convex-concave lens with negative optical power, whose first side surface S1 is convex and whose second side surface S2 is concave. The second lens L2 is a convex-concave lens with negative optical power, whose first side surface S3 is concave and whose second side surface S4 is concave. The third lens L3 is a convex-convex lens with positive optical power, whose first side surface S4 is convex and whose second side surface S5 is convex. The fourth lens L4 is a convex-convex lens with positive optical power, whose first side surface S6 is convex and whose second side surface S7 is convex. The fifth lens L5 is a convex-convex lens with positive optical power, whose first side surface S9 is convex and whose second side surface S10 is convex. The sixth lens L6 is a convex-concave lens with negative optical power, whose first side surface S10 is concave and whose second side surface S11 is concave. The seventh lens L7 is a convex-convex lens with positive optical power, whose first side surface S12 is convex and whose second side surface S13 is convex. Also, the first side surface S12 and the second side surface S13 of the seventh lens L7 have at least one inflection point.

[0203] The optical lens may further include a stop STO, which may be disposed between the fourth lens element L4 and the fifth lens element L5 to improve imaging quality. For example, the stop STO may be disposed at a position midway between the fourth lens element L4 and the fifth lens element L5.

[0204] For example, the optical lens may further include auxiliary lenses L8 and L9 with no optical power. Auxiliary lens L8 may have a first side surface S14 and a second side surface S15, and auxiliary lens L9 may have a first side surface S16 and a second side surface S17. Optionally, auxiliary lenses L8 and L9 may be filters or protective glass. Filters may be used to correct color deviation. Protective glass may be used to protect the image sensor chip IMA located on the imaging surface (not shown).

[0205] The optical lens provided in this application can be used, for example, as an automotive lens. In this case, light from an object sequentially passes through each surface S1 to S17 and is ultimately imaged on an imaging surface, where an image sensor chip IMA is disposed. It should be understood that the optical lens provided in this application can also be used, for example, as a projection lens or a laser radar transmitter lens. In this case, light from the image source side sequentially passes through each surface S17 to S1 and is ultimately projected onto a projection surface (not shown) disposed on the first side, where an image sensor chip IMA is disposed.

[0206] Table 13 shows the radius of curvature R, thickness / distance d, refractive index Nd, and Abbe number Vd of each lens of the optical lens of Example 7. Table 14 shows the conic coefficient and high-order coefficient of each aspheric mirror surface that can be used in Example 7, wherein the surface shape of each aspheric surface can be defined by formula (1) given in Example 1 above.

[0207]

[0208]

[0209] Table 13

[0210] Face number k A4 A6 A8 S12 -10.6250 -1.4217E-03 -8.9364E-05 1.3733E-05 S13 -18.6718 3.3034E-04 -7.2920E-05 2.0572E-05 Face number A10 A12 A14 A16 S12 -3.4735E-06 4.6691E-07 -3.2085E-08 8.8359E-10 S13 -4.6941E-06 6.2814E-07 -4.2469E-08 1.1467E-09

[0211] Table 14

[0212] Example 8

[0213] The following reference Figure 8 An optical lens according to Example 8 of the present application is described. Figure 8 A structural schematic diagram of an optical lens according to Example 8 of the present application is shown.

[0214] like Figure 8 As shown, the optical lens includes, from the first side to the second side along the optical axis, a first lens L1, a second lens L2, a third lens L3, a fourth lens L4, a fifth lens L5, a sixth lens L6 and a seventh lens L7.

[0215] The first lens L1 is a convex-concave lens with negative optical power, whose first side surface S1 is convex and whose second side surface S2 is concave. The second lens L2 is a convex-concave lens with negative optical power, whose first side surface S3 is concave and whose second side surface S4 is concave. The third lens L3 is a convex-convex lens with positive optical power, whose first side surface S4 is convex and whose second side surface S5 is convex. The fourth lens L4 is a convex-convex lens with positive optical power, whose first side surface S6 is convex and whose second side surface S7 is convex. The fifth lens L5 is a convex-convex lens with positive optical power, whose first side surface S9 is convex and whose second side surface S10 is convex. The sixth lens L6 is a convex-concave lens with negative optical power, whose first side surface S10 is concave and whose second side surface S11 is concave. The seventh lens L7 is a convex-convex lens with positive optical power, whose first side surface S12 is convex and whose second side surface S13 is convex. Also, the first side surface S12 and the second side surface S13 of the seventh lens L7 have at least one inflection point.

[0216] The optical lens may further include a stop STO, which may be disposed between the fourth lens element L4 and the fifth lens element L5 to improve imaging quality. The stop STO may be disposed between the fourth lens element L4 and the fifth lens element L5 and at a position close to the first side surface of the fifth lens element L5.

[0217] For example, the optical lens may further include auxiliary lenses L8 and L9 with no optical power. Auxiliary lens L8 may have a first side surface S14 and a second side surface S15, and auxiliary lens L9 may have a first side surface S16 and a second side surface S17. Optionally, auxiliary lenses L8 and L9 may be filters or protective glass. Filters may be used to correct color deviation. Protective glass may be used to protect the image sensor chip IMA located on the imaging surface (not shown).

[0218] The optical lens provided in this application can be used, for example, as an automotive lens. In this case, light from an object sequentially passes through each surface S1 to S17 and is ultimately imaged on an imaging surface, where an image sensor chip IMA is disposed. It should be understood that the optical lens provided in this application can also be used, for example, as a projection lens or a laser radar transmitter lens. In this case, light from the image source side sequentially passes through each surface S17 to S1 and is ultimately projected onto a projection surface (not shown) disposed on the first side, where an image sensor chip IMA is disposed.

[0219] Table 15 shows the radius of curvature R, thickness / distance d, refractive index Nd, and Abbe number Vd of each lens of the optical lens of Example 8. Table 16 shows the conic coefficient and high-order coefficient of each aspheric mirror surface that can be used in Example 8, wherein the surface shape of each aspheric surface can be defined by formula (1) given in Example 1 above.

[0220]

[0221] Table 15

[0222] Face number k A4 A6 A8 S12 -10.6250 -1.3112E-03 -8.8274E-05 1.3499E-05 S13 -18.6718 3.1792E-04 -7.2031E-05 2.0222E-05 Face number A10 A12 A14 A16 S12 -3.3976E-06 4.5448E-07 -3.1077E-08 8.5165E-10 S13 -4.5915E-06 6.1141E-07 -4.1136E-08 1.1053E-09

[0223] Table 16

[0224] In summary, Examples 1 to 8 respectively satisfy the relationships shown in Table 17 below. In Table 17, TTL, F, FOV, θ, H, D, BFL, R1, R2, d1, d67, ENPD, F1, F2, F3, F4, F5, F6, F7, F23, F56, SAG71, SAG72, D71, and D72. The unit of FOV is degrees (°), the unit of θ is radians (rad), and the remaining units are millimeters (mm).

[0225]

[0226]

[0227] Table 17-1

[0228]

[0229]

[0230] Table 17-2

[0231] The present application also provides an electronic device, which may include an optical lens according to the above-described embodiment of the present 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 standalone electronic device such as a range detection camera, or an imaging module integrated into a range detection device. Furthermore, the electronic device may be a standalone imaging device such as an onboard camera, or an imaging module integrated into a driver assistance system.

[0232] The above description is merely a preferred embodiment of the present application and an illustration 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 the technical solutions formed by the specific combination of the above-mentioned technical features, but also encompasses other technical solutions formed by any combination of the above-mentioned technical features or their equivalents without departing from the inventive concept. For example, a technical solution formed by replacing the above-mentioned 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 seven lenses having optical power, which are sequentially arranged from the first side to the second side along the optical axis: a first lens having negative optical power, wherein the first side surface is convex and the second side surface is concave; a second lens having negative optical power, wherein the first side surface thereof is concave; a third lens element having positive optical power and a convex second side surface; a fourth lens element having positive optical power and a convex first side surface; a fifth lens element having positive optical power, wherein the first side surface is convex and the second side surface is convex; a sixth lens element having negative optical power, wherein the first side surface and the second side surface of the sixth lens element are concave; and a seventh lens element having positive optical power, wherein the first side surface thereof is convex; Wherein, the second lens and the third lens are cemented together to form a cemented lens; A distance TTL from the center of the first side surface of the first lens to the imaging plane of the optical lens on the optical axis and a total effective focal length F of the optical lens satisfy the following conditions: 3.2405≤TTL / F≤4; A distance d67 between the sixth lens and the seventh lens and a distance TTL from the center of the first side surface of the first lens to the imaging plane of the optical lens on the optical axis satisfy the following conditions: 0.01≤d67 / TTL≤0.0446; The effective focal length F7 of the seventh lens and the total effective focal length F of the optical lens satisfy the following conditions: 1.8≤F7 / F≤4.9386; The focal length F56 of the cemented lens formed by cementing the fifth lens and the sixth lens and the total effective focal length F of the optical lens satisfy the following conditions: 2≤ F56 / F ≤8.9589.

2. The optical lens according to claim 1, wherein: The second side surface of the second lens is a convex surface.

3. The optical lens according to claim 1, wherein: The second side surface of the second lens is a concave surface.

4. The optical lens according to claim 1, wherein: The first side surface of the third lens is a concave surface.

5. The optical lens according to claim 1, wherein: The first side surface of the third lens is a convex surface.

6. The optical lens according to claim 1, wherein: The second side surface of the fourth lens is a convex surface.

7. The optical lens according to claim 1, wherein: The second side surface of the fourth lens is concave.

8. The optical lens according to claim 1, wherein: The second side surface of the seventh lens is concave.

9. The optical lens according to claim 1, wherein: The second side surface of the seventh lens is a convex surface.

10. The optical lens according to claim 1, wherein: The seventh lens has an aspherical surface.

11. The optical lens according to any one of claims 1 to 10, characterized in that: 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, the image height H corresponding to the maximum field of view of the optical lens, and the maximum field of view FOV of the optical lens meet the following requirements: 0.1002 180≤TTL / H / FOV 180°≤32.

4.

12. The optical lens according to any one of claims 1 to 10, characterized in that: The maximum field of view (FOV) of the optical lens satisfies the following conditions: 42.4°≤FOV≤52°.

13. The optical lens according to any one of claims 1 to 10, 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 maximum field of view FOV of the optical lens satisfy the following requirements: 0.0364 180≤D / H / FOV 180°≤8.

1.

14. The optical lens according to any one of claims 1 to 10, characterized in that: The maximum clear aperture D of the first side surface of the first lens corresponding to the maximum field angle of the optical lens, the image height H corresponding to the maximum field angle of the optical lens, and the radian value θ corresponding to the maximum field angle of the optical lens satisfy the following conditions: 2.0895≤D / H / θ≤2.

5.

15. The optical lens according to any one of claims 1 to 10, characterized in that: A distance BFL from the center of the second side surface of the seventh lens to the imaging plane of the optical lens on the optical axis and a distance TTL from the center of the first side surface of the first lens to the imaging plane of the optical lens on the optical axis satisfy: 0.1≤BFL / TTL≤0.2074.

16. The optical lens according to any one of claims 1 to 10, characterized in that: A curvature radius R1 of a first side surface of the first lens, a curvature radius R2 of a second side surface of the first lens, and a center thickness d1 of the first lens satisfy: 0.8≤R1 / (R2+d1)≤2.

17. The optical lens according to any one of claims 1 to 10, characterized in that: The total effective focal length F of the optical lens and the entrance pupil diameter ENPD of the optical lens satisfy: 1.6000≤F / ENPD≤2.

18. The optical lens according to any one of claims 1 to 10, characterized in that: The image height H corresponding to the maximum field angle of the optical lens, the total effective focal length F of the optical lens, and the arc value θ corresponding to the maximum field angle of the optical lens satisfy the following conditions: 0.5≤(H / 2) / (F tan(θ / 2))≤1.

5.

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

1.

20. The optical lens according to any one of claims 1 to 10, characterized in that: The focal length F23 of the cemented lens formed by cementing the second lens and the third lens and the total effective focal length F of the optical lens satisfy: 5≤ F23 / F ≤47.7215.

21. The optical lens according to any one of claims 1 to 10, characterized in that: The effective focal length F5 of the fifth lens and the effective focal length F6 of the sixth lens satisfy: 0.5≤ F5 / F6 ≤2.

22. The optical lens according to any one of claims 1 to 10, characterized in that: The vector height SAG71 of the first side surface of the seventh lens, the maximum light-clearance diameter D71 of the first side surface of the seventh lens corresponding to the maximum field of view angle of the optical lens, the vector height SAG72 of the second side surface of the seventh lens, and the maximum light-clearance diameter D72 of the second side surface of the seventh lens corresponding to the maximum field of view angle of the optical lens satisfy: 0.5≤(SAG71 / D71) / (SAG72 / D72)≤5.

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

Images