Optical lenses and electronic equipment

Abstract

The present application discloses an optical lens and an electronic device. The optical lens includes a first lens with optical power, a second lens with positive optical power, a third lens with negative 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 in order from the first side to the second side along the optical axis. The number of lenses with optical power in the optical lens is seven; the optical lens satisfies: ‑2≤F3 / F≤‑0.5, 0.25≤R6 / R7≤1.5 and ‑20≤F1 / F≤20, wherein F3 is the effective focal length of the third lens, F is the effective focal length of the optical lens, R6 is the curvature radius of the second side of the third lens, R7 is the curvature radius of the first side of the fourth lens, and F1 is the effective focal length of the first lens.

Description

Technical Field

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

[0002] With the development of smart headlights, it is particularly important to continuously improve the performance indicators of projection lenses in order to provide better human-vehicle interaction and audio-visual entertainment needs.

[0003] Unlike ordinary projection lenses, the projection lenses of smart headlights have more special requirements in terms of human-vehicle interaction and audio-visual entertainment. For example, in order to ensure that the driver has a clear enough field of view and driving safety is more guaranteed, the projection lens needs to achieve lighting and high-definition projection at the same time.

[0004] At present, the projection lenses of smart headlights in the existing technology have the following main problems: 1) Although the clarity can reach 10,000 pixels, the lens aberration problems such as chromatic aberration, astigmatism, and distortion are relatively serious; 2) Although the clarity can reach 10,000 pixels, the projection luminous flux and illumination are low; 3) The projection resolution is low, and the realization of pattern details is poor. Summary of the invention

[0005] The first aspect of the present application provides an optical lens, which includes, in order from the first side to the second side along the optical axis: a first lens with optical power, a second lens with positive optical power, a third lens with negative 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. Among them, the first side surfaces of the first lens, the second lens, and the fifth lens are all convex; the first side surface of the third lens is concave, and the second side surface is concave; the first side surface of the fourth lens is convex, and the second side surface is convex; the second side surface of the sixth lens is concave. The first side surface of the seventh lens is convex, and the second side surface is concave. The number of lenses with optical power in the optical lens is seven. The optical lens satisfies: -2≤F3 / F≤-0.5, 0.25≤R6 / R7≤1.5 and -20≤F1 / F≤20, wherein F3 is the effective focal length of the third lens, F is the effective focal length of the optical lens, R6 is the curvature radius of the second side surface of the third lens, R7 is the curvature radius of the first side surface of the fourth lens, and F1 is the effective focal length of the first lens.

[0006] The optical lens provided by the present application adopts seven lenses. The first side surface of the first lens is convex, so that the lens has a beautiful appearance in actual use and is not easy to accumulate dust. By reasonably allocating the focal length of the first lens, that is, satisfying -20≤F1 / F≤20, it is beneficial for light with a large field angle to enter the optical system and increase the amount of light. After the light enters the system from the first side surface of the first lens, it passes through the second lens with positive focal power, and transmits as much light emitted by the first lens as possible to the first side surface of the third lens. The focal power of the third lens is set to be negative and satisfy -2≤F3 / F≤-0.5, which is beneficial to properly diffuse the light, expand the aperture of the diaphragm, and increase the aperture of light. The second side surface of the third lens is concave, and the first side surface of the fourth lens is convex. The two surfaces are concave and convex. When the light is emitted from the second side surface of the third lens, R6 / R7 is limited to the range of 0.25 to 1.5, which is beneficial for the light divergence of the third lens to smoothly transition to the rear positive lens group, reducing the sensitivity of the lens. Therefore, the front end of the optical lens has a larger aperture and lower sensitivity, laying a foundation for ultimately achieving a better imaging effect. Setting the optical power of the fourth lens and the fifth lens to be positive is beneficial to collecting the divergent light of the previous lens and converging it, and making the convergent light move smoothly, reducing the converging pressure of the rear lens group, and reducing the sensitivity of the lens. The optical power of the sixth lens is negative, collecting and diverging the light from the front lens group, and smoothly transitioning the light to the seventh lens with a positive optical power. The surface of the seventh lens is a convex and concave combination, which can better converge the light and help reduce the back focus, thereby reducing the volume of the entire lens group.

[0007] In one embodiment, the first lens has positive optical power.

[0008] In one embodiment, the first lens has negative optical power.

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

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

[0011] In one embodiment, the second side surface of the second lens is a convex surface, a flat surface or a concave surface.

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

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

[0014] In one embodiment, the optical lens satisfies: -1.4≤F3 / F≤-0.8.

[0015] In one embodiment, the optical lens satisfies: 0.3≤R6 / R7≤1.3.

[0016] In one embodiment, the optical lens satisfies: F / ENPD≤0.9, where ENPD is the entrance pupil diameter of the optical lens.

[0017] In one embodiment, the optical lens satisfies: 1≤DST / F≤1.5, wherein DST is the clear aperture of the aperture of the optical lens.

[0018] In one embodiment, the optical lens satisfies: Di>0.9Dj, wherein i=1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, j=i+1, when i is 1, j=2, D1 represents the light-clearing aperture of the first side surface of the first lens, and D2 represents the light-clearing aperture of the second side surface of the first lens; when i is 2, j=3, D3 represents the light-clearing aperture of the first side surface of the second lens; when i is 3, j=4, D4 represents the light-clearing aperture of the second side surface of the second lens; when i is 4, j=5, D5 represents the light-clearing aperture of the first side surface of the third lens; when i is 5, j=6, D6 represents the light-clearing aperture of the second side surface of the third lens; when i is 6, j=7. =7, D7 represents the light-clearing aperture of the first side surface of the fourth lens; when i is 7, j=8, D8 represents the light-clearing aperture of the second side surface of the fourth lens; when i is 8, j=9, D9 represents the light-clearing aperture of the first side surface of the fifth lens; when i is 9, j=10, D10 represents the light-clearing aperture of the second side surface of the fifth lens; when i is 10, j=11, D11 represents the light-clearing aperture of the first side surface of the sixth lens; when i is 11, j=12, D12 represents the light-clearing aperture of the second side surface of the sixth lens; when i is 12, j=13, D13 represents the light-clearing aperture of the first side surface of the seventh lens; when i is 13, j=14, D14 represents the light-clearing aperture of the second side surface of the seventh lens.

[0019] In one embodiment, the optical lens satisfies: 1≤F2 / F≤6, where F2 is the effective focal length of the second lens.

[0020] In one embodiment, the optical lens satisfies: 0.2≤F7 / F≤1, where F7 is the effective focal length of the seventh lens.

[0021] In one embodiment, the optical lens satisfies: -1.5≤F3 / F4≤-0.5, wherein F4 is the effective focal length of the fourth lens.

[0022] In one embodiment, the optical lens satisfies: 1.3≤|F5 / F6|≤2.5, wherein F5 is the effective focal length of the fifth lens, and F6 is the effective focal length of the sixth lens.

[0023] In one embodiment, the optical lens satisfies: 1.5≤(R8-R9) / (R8+R9)≤5, wherein R8 is the radius of curvature of the second side surface of the fourth lens, and R9 is the radius of curvature of the first side surface of the fifth lens.

[0024] In one embodiment, the optical lens satisfies: |R11 / R12|≥8, wherein R11 is the radius of curvature of the first side surface of the sixth lens, and R12 is the radius of curvature of the second side surface of the sixth lens.

[0025] In one embodiment, the optical lens satisfies: 0.3≤R13 / F≤0.8, wherein R13 is the radius of curvature of the first side surface of the seventh lens.

[0026] In one embodiment, the optical lens satisfies: 0.002≤d2 / F≤0.35, wherein d2 is an air gap between the first lens and the second lens on the optical axis.

[0027] In one embodiment, the optical lens satisfies at least one of the following conditional formulas: 1.2≤F2 / F≤5.5, -1.4≤F3 / F≤-0.8, 0.5≤F7 / F≤1, 8≤|R11 / R12|≤200, 0.6≤F / ENPD≤0.8, 1.01≤DST / F≤1.45, -0.95≤F3 / F4≤-0.75, 1.5≤|F5 / F6|≤2.3, 1.8≤(R8-R9) / (R8+R9)≤4.3, 1≤|SAG9 / SAG10|≤90, 3≤|SAG9 / SA G10|≤70, 0.02≤(d8+d10+d12) / TTL≤0.065, 0.3≤R6 / R7≤1.3, 0.45≤R13 / F≤0.63, 0.005≤d2 / F≤0.32, 0≤d6 / TTL≤0.5, 0≤d6 / TTL≤0.3, 1≤F12 / F≤3, 1.2≤F12 / F≤2.5, 2≤F34 / F≤25, 3≤F34 / F≤20, -18≤F1 / F≤15, where ENPD is the entrance pupil diameter of the optical lens, and DST is the aperture diameter of the optical lens. , F2 is the effective focal length of the second lens, F7 is the effective focal length of the seventh lens, F4 is the effective focal length of the fourth lens, F5 is the effective focal length of the fifth lens, F6 is the effective focal length of the sixth lens, R8 is the curvature radius of the second side surface of the fourth lens, R9 is the curvature radius of the first side surface of the fifth lens, R11 is the curvature radius of the first side surface of the sixth lens, R12 is the curvature radius of the second side surface of the sixth lens, d2 is the air gap between the first lens and the second lens on the optical axis, SAG9 is the effective radius vertex from the intersection of the first side surface of the fifth lens and the optical axis to the first side surface of the fifth lens The distance on the optical axis, SAG10 is the distance from the intersection of the second side surface of the fifth lens and the optical axis to the vertex of the effective radius of the second side surface of the fifth lens on the optical axis, d8 is the air spacing between the fourth lens and the fifth lens on the optical axis, d10 is the air spacing between the fifth lens and the sixth lens on the optical axis, d12 is the air spacing between the sixth lens and the seventh lens on the optical axis, TTL is the total optical length of the optical lens, d6 is the air spacing between the third lens and the fourth lens on the optical axis, F12 is the combined effective focal length of the first lens and the second lens, and F34 is the combined effective focal length of the third lens and the fourth lens.

[0028] In one embodiment, the optical lens satisfies at least one of the following conditional formulas: 1.30≤F2 / F≤5.10, -1.49≤F3 / F≤-0.79, 0.74≤F7 / F≤0.93, 9.04≤|R11 / R12|≤196.74, 0.68≤F / ENPD≤0.78, 1.17≤DST / F≤1.41, -0.92≤F3 / F4≤-0.72, 1.70≤|F5 / F6|≤2.15, 1.76≤(R8-R9 ) / (R8+R9)≤4.42, 4.18≤|SAG9 / SAG10|≤68.73, 0.03≤(d8+d10+d12) / TTL≤0.06, 0.31≤R6 / R7≤1.00, 0.50≤R13 / F≤0.63, 0.009≤d2 / F≤0.31, 0≤d6 / TTL≤0.23, 1.51≤F12 / F≤2.22, 3.66≤F34 / F≤18, -16.98≤F1 / F≤13.67.

[0029] The second aspect of the present application provides an electronic device. The electronic device includes the optical lens provided according to the present application, and also includes at least one of an imaging element and a light source, wherein the imaging element is used to convert an optical image formed by the optical lens into an electrical signal, and the light emitted by the light source is projected onto a target area after passing through the optical lens to form an image or illuminate the area.

[0030] The present application adopts seven lenses, and by optimizing the shape, optical focal length, etc. of each lens, the optical lens provided by the present application has at least one beneficial effect of miniaturization, small FNO, short back focus, low sensitivity, high light throughput, high central illumination, high resolution and high performance. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Other features, objects and advantages of the present application will become more apparent by reading the detailed description of non-limiting embodiments made with reference to the following drawings. In the drawings:

[0032] Figure 1 A schematic structural diagram of an optical lens according to Embodiment 1 of the present application is shown;

[0033] Figure 2 shows a modulation transfer function curve diagram of the optical lens according to Example 1 of the present application;

[0034] Figure 3 A schematic structural diagram of an optical lens according to Embodiment 2 of the present application is shown;

[0035] Figure 4 shows a modulation transfer function curve diagram of the optical lens according to Example 2 of the present application;

[0036] Figure 5 A schematic structural diagram of an optical lens according to Embodiment 3 of the present application is shown;

[0037] Figure 6 shows a modulation transfer function curve diagram of the optical lens according to Example 3 of the present application;

[0038] Figure 7 A schematic structural diagram of an optical lens according to Embodiment 4 of the present application is shown;

[0039] Figure 8 shows a modulation transfer function curve diagram of the optical lens according to Example 4 of the present application;

[0040] Fig. 9 A schematic structural diagram of an optical lens according to Embodiment 5 of the present application is shown;

[0041] Fig.10 shows a modulation transfer function curve diagram of the optical lens according to Example 5 of the present application;

[0042] Fig.11 A schematic structural diagram of an optical lens according to Embodiment 6 of the present application is shown;

[0043] Fig.12 shows a modulation transfer function curve diagram of the optical lens according to Example 6 of the present application;

[0044] Fig.13 A schematic structural diagram of an optical lens according to Embodiment 7 of the present application is shown;

[0045] Fig.14 shows a modulation transfer function curve diagram of the optical lens according to Example 7 of the present application;

[0046] Fig.15 A schematic structural diagram of an optical lens according to Example 8 of the present application is shown;

[0047] Fig.16 shows a modulation transfer function curve diagram of the optical lens according to Example 8 of the present application;

[0048] Fig.17 A schematic structural diagram of an optical lens according to Example 9 of the present application is shown;

[0049] Fig.18 shows a modulation transfer function curve diagram of the optical lens according to Example 9 of the present application;

[0050] Fig.19 A schematic structural diagram of an optical lens according to Embodiment 10 of the present application is shown;

[0051] Fig. 20shows a modulation transfer function curve diagram of the optical lens according to Example 10 of the present application;

[0052] Fig.21 A schematic structural diagram of an optical lens according to Example 11 of the present application is shown;

[0053] Fig. 22 A modulation transfer function curve graph of the optical lens according to Example 11 of the present application is shown. DETAILED DESCRIPTION

[0054] In order to facilitate the understanding of the present application, the present application will be described more comprehensively below with reference to the relevant drawings. It should be understood that these detailed descriptions are only descriptions of exemplary embodiments of the present application, and do not limit the scope of the present application in any way. Throughout the specification, the same figure numbers refer to the same elements. The expression "and / or" includes any and all combinations of one or more of the associated listed items.

[0055] It should be noted that in this specification, the expressions of first, second, third, etc. are only used to distinguish one feature from another feature, and do not represent any limitation on the features. Therefore, without departing from the teaching of the present application, the first lens discussed below may also be referred to as the second lens or the third lens.

[0056] In the drawings, the thickness, size and shape of the lenses have been slightly exaggerated for ease of explanation. Specifically, the shapes of the spherical or aspherical surfaces shown in the drawings are shown by way of example. That is, the shapes of the spherical or aspherical surfaces are not limited to the shapes of the spherical or aspherical surfaces shown in the drawings. The drawings are only examples and are not drawn strictly to scale.

[0057] In this article, the paraxial region refers to the region near the optical axis. If the lens surface is convex and the convex position 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 concave position is not defined, it means that the lens surface is concave at least in the paraxial region. The judgment of the surface type in the paraxial region can be judged according to the general method in the art, for example, the positive and negative R value (R refers to the radius of curvature of the paraxial region) is used to judge the concave and convex. Exemplarily, when the optical lens provided by the present application is used for photography, the surface of each lens closest to the subject is called the object side of the lens, and the surface of each lens closest to the imaging side is called the image side of the lens. In terms of the object side, when the R value is positive, it is judged as a convex surface, and when the R value is negative, it is judged as a concave surface; in terms of the image side, when the R value is positive, it is judged as a concave surface, and when the R value is negative, it is judged as a convex surface.

[0058] It should be understood that the optical lens provided in the present application can be used for both video and projection, and can also be used for laser radar lenses. When the optical lens provided in the present application is used for a camera lens or a laser radar receiving end lens, the "first side" referred to in this article may refer to the object side, and the "second side" may refer to the image side. The light from the object side can be imaged on the image side, for example, wherein the camera lens can be, for example, a vehicle-mounted camera, an infrared camera, a drone camera, a night vision camera, a security monitoring camera, etc.; when the optical lens provided in the present application is used for a projection lens or a radar transmitting end lens, the "first side" referred to in this article may refer to the object side, and the "second side" may refer to the light source side. The second side of the optical lens may be provided with a light source, and the light source may provide light with or without image information. The light from the light source side passes through the optical lens and is projected to the first side, for example, forming an image or illuminating an area on the first side.

[0059] 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 exclude 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 listed 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.

[0060] Unless otherwise defined, all terms (including technical terms and scientific terms) used in this article have the same meaning as commonly understood by ordinary technicians in the field to which this application belongs. It should also be understood that terms (such as terms 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 explicitly defined in this article.

[0061] It should be noted that, in the absence of conflict, the embodiments and features in the embodiments of the present 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.

[0062] The features, principles and other aspects of the present application are described in detail below.

[0063] 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.

[0064] In an exemplary embodiment, the optical lens provided by the present application can be used as, for example, a vehicle-mounted lens, in which 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 be imaged on the image side. The second side of the optical lens can be provided with an imaging surface of the optical lens, in which case TTL is the distance from the center of the first side surface of the first lens to the imaging surface of the optical lens on the optical axis.

[0065] In an exemplary embodiment, the optical lens may further include a photosensitive element disposed on the second side surface. Optionally, the photosensitive element disposed on the second side surface may be a charge coupled device (CCD) or a complementary metal oxide semiconductor (CMOS).

[0066] In an exemplary embodiment, the optical lens provided in the present application can be used as, for example, a projection lens or a laser radar transmitting end lens. In this case, the first side of the optical lens can be the object side, and the second side can be the light source side. The second side of the optical lens can be provided with a light source surface of the optical lens, and the light source surface can provide light with or without image information. The light from the light source side passes through the optical lens and is projected to the object side, for example, an image can be formed on the object side or an illuminated area can be illuminated. In this case, TTL is the distance from the center of the first side surface of the first lens to the light source surface of the optical lens on the optical axis.

[0067] In an exemplary embodiment, the first lens has positive power, and its first side surface is convex and its second side surface is concave. The first lens has positive power, which is conducive to collecting light with a large field of view, and the first side surface (object side) is convex, which is conducive to beautiful appearance in actual use and not easy to accumulate dust; at the same time, the first lens is a meniscus lens, which can make the incoming light transition to the next lens at a smaller angle, so that the entrance pupil is far away from the main surface of the image side, which is conducive to reducing the object side telecentricity.

[0068] In an exemplary embodiment, the first lens has positive power, and its first side surface is convex, and its second side surface is convex. The first lens has positive power, which is conducive to collecting light with a large field of view, and the first side surface (object side) is convex, which is conducive to beautiful appearance in actual use and not easy to accumulate dust; the second side surface (image side) is convex, which can further compress the beam aperture of the large field of view received by the first side surface (object side), which is conducive to increasing the amount of light passing and improving the illumination.

[0069] In an exemplary embodiment, the first lens has negative optical power, and its first side surface is convex and its second side surface is concave. The first lens has negative optical power, which is conducive to collecting light with a large field of view, and the first side surface (object side) is convex, which is conducive to beautiful appearance in actual use and not easy to accumulate dust; at the same time, the first lens is a meniscus lens with approximately concentric circles, which is conducive to reducing spherical aberration.

[0070] In an exemplary embodiment, the second lens has positive power, its first side surface is convex, and its second side surface is concave. The second lens has positive power, and its first side surface (object side surface) is convex, which can collect a large field of view of light from the first lens and further converge the light. The second side surface (image side surface) of the second lens is concave, which makes the light trend smooth, which is conducive to reducing the volume of the rear lens group.

[0071] In an exemplary embodiment, the second lens has positive power, its first side surface is convex, and its second side surface is flat. The second lens has positive power, and its first side surface (object side surface) is convex, which can collect a large field of view of light from the first lens and further converge the light. The second side surface (image side surface) of the second lens is flat, which makes the light trend smooth, which is conducive to reducing the volume of the rear lens group.

[0072] In an exemplary embodiment, the second lens has positive power, and its first side surface is convex, and its second side surface is convex. The second lens has positive power, and with a biconvex surface, it can better collect the light of the first lens and further converge the light. The second side surface (image side) of the second lens is convex, which can further compress the beam aperture of the large field of view received by the first side surface (object side), which is conducive to increasing the amount of light passing and improving the illumination.

[0073] In an exemplary embodiment, the third lens has negative optical power, and its first side surface is concave, and its second side surface is concave. The third lens has negative optical power, and its first side surface (object side surface) is concave, which can collect and smooth the light from the second lens. The second side surface (image side surface) of the third lens is concave, which is conducive to further diverging the light to pass through the rear lens group, and cooperate with the second lens with positive optical power in front to reduce aberrations.

[0074] In an exemplary embodiment, the fourth lens has positive power, and its first side surface is convex, and its second side surface is convex. The fourth lens has positive power and is equipped with a biconvex surface, which can better collect the divergent light of the third lens and converge it, and make the convergent light trend smooth, reduce the convergence pressure of the rear lens group, and reduce the sensitivity of the lens.

[0075] In an exemplary embodiment, the fifth lens has positive power, and its first side surface is convex and its second side surface is concave. The fifth lens has positive power and can collect and focus light from the front lens group. The convex-concave type can increase its contribution to the focusing system, thereby reducing the volume of other lenses to reduce costs.

[0076] In an exemplary embodiment, the fifth lens has positive power, and its first side surface is convex, and its second side surface is convex. The fifth lens has positive power, and its first side surface (object side surface) is convex, which can collect light from the fourth lens and further converge the light, and the second side surface (image side surface) is convex, which can make the converged light trend smooth, which is conducive to reducing the sensitivity of the lens.

[0077] In an exemplary embodiment, the sixth lens has negative power, and its first side surface is convex and its second side surface is concave. The sixth lens has negative power and can collect and diverge light from the front lens group. With the convex-concave type, the light trend can be smoothed better, thereby reducing the sensitivity of the lens.

[0078] In an exemplary embodiment, the sixth lens has negative optical power, and its first side surface is concave, and its second side surface is concave. The sixth lens has negative optical power and is equipped with a double concave surface, which can better diverge the light, increase the contribution ratio of the lens with negative optical power in the system, and is conducive to thermal compensation.

[0079] In an exemplary embodiment, the seventh lens has positive power, and its first side surface is convex and its second side surface is concave. The seventh lens has positive power, collects light from the front lens group and focuses it, and with the convex-concave type, it can better converge the light, which is conducive to reducing the back focus, thereby reducing the volume of the entire lens group.

[0080] In an exemplary embodiment, the optical lens according to the present application may include an aperture, and the aperture may be disposed between the third lens and the fourth lens, or between the fourth lens and the fifth lens. However, it should be noted that the position of the aperture disclosed herein is only an example and not a limitation; in an alternative embodiment, the aperture may also be disposed at other positions according to actual needs.

[0081] In an exemplary embodiment, the optical lens according to the present application may satisfy: -2≤F3 / F≤-0.5, where F3 is the effective focal length of the third lens and F is the effective focal length of the optical lens. Satisfying -2≤F3 / F≤-0.5 and reasonably allocating the effective focal length of the third lens is conducive to properly diffusing light, expanding the aperture diameter, and improving the clear aperture. More specifically, F3 and F may further satisfy: -1.4≤F3 / F≤-0.8, and may further satisfy -1.49≤F3 / F≤-0.79, which is conducive to better expanding the aperture diameter and improving the clear aperture.

[0082] In an exemplary embodiment, the optical lens according to the present application may satisfy: 0.25≤R6 / R7≤1.5, wherein R6 is the radius of curvature of the second side of the third lens, and R7 is the radius of curvature of the first side of the fourth lens. Satisfying 0.25≤R6 / R7≤1.5, the second side of the third lens is concave, and the first side of the fourth lens is convex, and the two sides are concave and convex. When the light is emitted from the second side of the third lens, since the values ​​of R6 and R7 are not much different, the light diverging from the third lens can smoothly transition to the fourth lens at the rear, reducing the sensitivity of the lens. More specifically, R6 and R7 can further satisfy 0.3≤R6 / R7≤1.3, and can further satisfy 0.31≤R6 / R7≤1.00, which is conducive to better reducing the sensitivity of the lens.

[0083] In an exemplary embodiment, the optical lens according to the present application may satisfy: -20≤F1 / F≤20, where F1 is the effective focal length of the first lens and F is the effective focal length of the optical lens. Satisfying -20≤F1 / F≤20 and reasonably allocating the effective focal length of the first lens may facilitate the entry of light with a large field angle into the optical system. More specifically, F1 and F may further satisfy -18≤F1 / F≤15, and may further satisfy -16.98≤F1 / F≤13.67, which may further facilitate the entry of light with a large field angle into the optical system.

[0084] In an exemplary embodiment, the optical lens according to the present application may satisfy: F / ENPD≤0.9, where ENPD is the entrance pupil diameter of the optical lens, and F is the effective focal length of the optical lens. Satisfying F / ENPD≤0.9 is conducive to achieving a small FNO and increasing the amount of light. More specifically, F and ENPD may further satisfy 0.6≤F / ENPD≤0.8, and may further satisfy 0.68≤F / ENPD≤0.78, which may be more conducive to achieving a small FNO and increasing the amount of light.

[0085] In an exemplary embodiment, the optical lens according to the present application may satisfy: 1≤DST / F≤1.5, where DST is the aperture of the optical lens, and F is the effective focal length of the optical lens. Satisfying 1≤DST / F≤1.5 makes the ratio of the aperture to the effective focal length larger, and the larger the lens aperture, the higher the luminous flux. More specifically, DST and F may further satisfy 1.01≤DST / F≤1.45, and may further satisfy 1.17≤DST / F≤1.41, which may better achieve high light flux.

[0086] In an exemplary embodiment, the optical lens according to the present application may satisfy: Di>0.9Dj, wherein i=1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, j=i+1, when i is 1, j=2, D1 represents the clear aperture of the first side surface of the first lens, and D2 represents the clear aperture of the second side surface of the first lens; when i is 2, j=3, D3 represents the clear aperture of the first side surface of the second lens; when i is 3, j=4, D4 represents the clear aperture of the second side surface of the second lens; when i is 4, j=5, D5 represents the clear aperture of the first side surface of the third lens; when i is 5, j=6, D6 represents the clear aperture of the second side surface of the third lens; when i is When i is 6, j=7, D7 represents the light-clearing aperture of the first side surface of the fourth lens; when i is 7, j=8, D8 represents the light-clearing aperture of the second side surface of the fourth lens; when i is 8, j=9, D9 represents the light-clearing aperture of the first side surface of the fifth lens; when i is 9, j=10, D10 represents the light-clearing aperture of the second side surface of the fifth lens; when i is 10, j=11, D11 represents the light-clearing aperture of the first side surface of the sixth lens; when i is 11, j=12, D12 represents the light-clearing aperture of the second side surface of the sixth lens; when i is 12, j=13, D13 represents the light-clearing aperture of the first side surface of the seventh lens; when i is 13, j=14, D14 represents the light-clearing aperture of the second side surface of the seventh lens. Light from the object passes through the first side surface of the first lens to the second side surface of the seventh lens in sequence and is finally imaged on the imaging surface arranged on the second side. The size relationship of the light aperture of the two adjacent surfaces is controlled within this range, which is beneficial for the front end of the lens to collect a large field of view of light and gradually and smoothly transmit it to the rear lens group.

[0087] In an exemplary embodiment, the optical lens according to the present application may satisfy: 1≤F2 / F≤6, wherein F2 is the effective focal length of the second lens, and F is the effective focal length of the optical lens. Satisfying 1≤F2 / F≤6, the effective focal length of the second lens is reasonably allocated, so that the light is compressed to a certain extent at the second lens. At the same time, since F2 is relatively large, the light trend is relatively stable. When the F2 / F ratio is within this range, as much light as possible can be collected in a limited space, and it is also helpful to balance various aberrations. More specifically, F2 and F may further satisfy: 1.2≤F2 / F≤5.5, and may further satisfy 1.30≤F2 / F≤5.10, which may be more conducive to balancing various aberrations and achieving high resolution.

[0088] In an exemplary embodiment, the optical lens according to the present application may satisfy: 0.2≤F7 / F≤1, where F7 is the effective focal length of the seventh lens, and F is the effective focal length of the optical lens. Satisfying 0.2≤F7 / F≤1, the focal length of the seventh lens is set to be positive (F7 / F>0), which can effectively converge the light of the large aperture at the front end, reduce the back focus to a certain extent, and thus reduce the total length of the system. More specifically, F7 and F can further satisfy: 0.5≤F7 / F≤1, and can further satisfy 0.74≤F7 / F≤0.93, which can better achieve the characteristics of short back focus and achieve miniaturization.

[0089] In an exemplary embodiment, the optical lens according to the present application may satisfy: -1.5≤F3 / F4≤-0.5, wherein F3 is the effective focal length of the third lens, and F4 is the effective focal length of the fourth lens. Satisfying -1.5≤F3 / F4≤-0.5, by controlling the focal length ratio of the third lens to the fourth lens, the trend of light rays diverged by the third lens and then converged by the fourth lens is controlled, thereby reducing the sensitivity of the system. More specifically, F3 and F4 may further satisfy: -0.95≤F3 / F4≤-0.75, and may further satisfy -0.92≤F3 / F4≤-0.72, which is conducive to better reducing the sensitivity of the system.

[0090] In an exemplary embodiment, the optical lens according to the present application may satisfy: 1.3≤|F5 / F6|≤2.5, wherein F5 is the effective focal length of the fifth lens, and F6 is the effective focal length of the sixth lens. Satisfying 1.3≤|F5 / F6|≤2.5, by controlling the focal length ratio of the fifth lens to the sixth lens, the light is made to move smoothly during the focusing process of the fifth lens and the sixth lens, thereby reducing the sensitivity of the lens. More specifically, F5 and F6 may further satisfy 1.5≤|F5 / F6|≤2.3, and may further satisfy 1.70≤|F5 / F6|≤2.15, which is conducive to better reducing the sensitivity of the system.

[0091] In an exemplary embodiment, the optical lens according to the present application may satisfy: 1.5≤(R8-R9) / (R8+R9)≤5, wherein R8 is the radius of curvature of the second side of the fourth lens, and R9 is the radius of curvature of the first side of the fifth lens. By satisfying 1.5≤(R8-R9) / (R8+R9)≤5, by controlling the degree of difference in curvature between the second side of the fourth lens and the first side of the fifth lens, the spherical aberration caused by the front lens group can be effectively corrected, thereby improving the resolution of the lens. More specifically, R8 and R9 may further satisfy 1.8≤(R8-R9) / (R8+R9)≤4.3, and may further satisfy 1.76≤(R8-R9) / (R8+R9)≤4.42, which is conducive to better improving the resolution of the lens.

[0092] In an exemplary embodiment, the optical lens according to the present application may satisfy: |R11 / R12|≥8, wherein R11 is the radius of curvature of the first side of the sixth lens, and R12 is the radius of curvature of the second side of the sixth lens. To satisfy |R11 / R12|≥8, the shape of the sixth lens is convex-concave or concave-concave, so that the front large-diameter converging light can transition smoothly, which helps to balance various types of aberrations and reduce the sensitivity of the lens to a certain extent. More specifically, R11 and R12 may further satisfy: 8≤|R11 / R12|≤200, and may further satisfy 9.04≤|R11 / R12|≤196.74, which is conducive to better reducing the sensitivity of the lens.

[0093] In an exemplary embodiment, the optical lens according to the present application may satisfy: 0.3≤R13 / F≤0.8, wherein R13 is the radius of curvature of the first side surface of the seventh lens, and F is the effective focal length of the optical lens. Satisfying 0.3≤R13 / F≤0.8 and controlling the ratio of the radius of curvature of the first side surface of the seventh lens to the focal length of the optical lens within this range is conducive to converging the light diverged from the front negative film, thereby shortening the back focus. More specifically, R13 and F may further satisfy 0.45≤R13 / F≤0.63, and may further satisfy 0.50≤R13 / F≤0.63, which is conducive to better shortening the back focus.

[0094] In an exemplary embodiment, the optical lens according to the present application may satisfy: 0.002≤d2 / F≤0.35, wherein d2 is the air gap between the first lens and the second lens on the optical axis, and F is the effective focal length of the optical lens. Satisfying 0.002≤d2 / F≤0.35 and controlling the ratio of the air gap between the first lens and the second lens to the focal length of the optical lens within a certain range is conducive to reducing the spherical aberration of the large field of view light collected by the first lens and improving the system resolution. More specifically, d2 and F may further satisfy: 0.005≤d2 / F≤0.32, and may further satisfy 0.009≤d2 / F≤0.31, which is conducive to better improving the system resolution.

[0095] In an exemplary embodiment, the optical lens according to the present application may satisfy: 1≤|SAG9 / SAG10|≤90, wherein SAG9 is the distance from the intersection of the first side surface of the fifth lens and the optical axis to the vertex of the effective radius of the first side surface of the fifth lens on the optical axis, and SAG10 is the distance from the intersection of the second side surface of the fifth lens and the optical axis to the vertex of the effective radius of the second side surface of the fifth lens on the optical axis. Satisfying 1≤|SAG9 / SAG10|≤90 makes the difference between the vector height of the first side surface and the second side surface of the fifth lens larger, which is beneficial for the fourth lens to collect light, so that the light smoothly transitions to the rear, and can effectively reduce the system aberration and improve the system imaging quality. More specifically, SAG9 and SAG10 can further satisfy 3≤|SAG9 / SAG10|≤70, and can further satisfy 4.18≤|SAG9 / SAG10|≤68.73, which is beneficial to better reduce the system aberration and improve the resolution.

[0096] In an exemplary embodiment, the optical lens according to the present application may satisfy: 0.02≤(d8+d10+d12) / TTL≤0.065, wherein d8 is the air interval between the fourth lens and the fifth lens on the optical axis, d10 is the air interval between the fifth lens and the sixth lens on the optical axis, d12 is the air interval between the sixth lens and the seventh lens on the optical axis, and TTL is the total optical length of the optical lens. Satisfying 0.02≤(d8+d10+d12) / TTL≤0.065 and controlling the air interval of the rear lens group (the fourth lens to the seventh lens) to be less than a certain value is conducive to making the lens layout compact, reducing the volume, and facilitating module installation. More specifically, d8, d10, d12 and TTL may further satisfy: 0.03≤(d8+d10+d12) / TTL≤0.06, which is conducive to better achieving a small volume.

[0097] In an exemplary embodiment, the optical lens according to the present application may satisfy: 0≤d6 / TTL≤0.5, wherein d6 is the air interval between the third lens and the fourth lens on the optical axis, and TTL is the total optical length of the optical lens. Satisfying 0≤d6 / TTL≤0.5 and controlling the air interval between the third lens and the fourth lens within this range is conducive to a smooth transition of light and reduces the sensitivity of the lens. More specifically, d6 and TTL may further satisfy: 0≤d6 / TTL≤0.3, and may further satisfy 0≤d6 / TTL≤0.23, which is conducive to better achieving low sensitivity.

[0098] In an exemplary embodiment, the optical lens according to the present application may satisfy: 1≤F12 / F≤3, wherein F12 is the combined effective focal length of the first lens and the second lens, and F is the effective focal length of the optical lens. Satisfying 1≤F12 / F≤3 is conducive to controlling the light trend from entering the optical system to the third lens, reducing the aberration caused by the entering large-angle light, and making the lens structure compact, which is conducive to miniaturization. More specifically, F12 and F may further satisfy: 1.2≤F12 / F≤2.5, and may further satisfy 1.51≤F12 / F≤2.22, which is conducive to better achieving low aberration and miniaturization.

[0099] In an exemplary embodiment, the optical lens according to the present application may satisfy: 2≤F34 / F≤25, wherein F34 is the combined effective focal length of the third lens and the fourth lens, and F is the effective focal length of the optical lens. Satisfying 2≤F34 / F≤25 and controlling the combined focal length of the third lens and the fourth lens within this range is conducive to the smooth transition of light, to the correction of lens astigmatism, and to the improvement of lens resolution. More specifically, F34 and F may further satisfy 3≤F34 / F≤20, and may further satisfy 3.66≤F34 / F≤18, which is conducive to better achieving low sensitivity and improving resolution.

[0100] In an exemplary embodiment, the optical lens according to the present application may satisfy: F / TTL≥0.3, where F is the effective focal length of the optical lens and TTL is the total optical length of the optical lens. Satisfying F / TTL≥0.3 and controlling the ratio of the focal length of the entire lens group to the total lens length to be higher than a certain level is conducive to making the energy of the central field of view light after passing through the lens group more concentrated, which can effectively improve the central illumination. More specifically, F and TTL may further satisfy 0.38≤F / TTL≤0.44, and may further satisfy 0.40≤F / TTL≤0.44, which is conducive to better improving the central illumination.

[0101] In an exemplary embodiment, the optical lens according to the present application may include a cemented lens group. Exemplarily, the fifth lens and the sixth lens may form a double cemented lens group. Exemplarily, the third lens and the fourth lens may form a double cemented lens group. The use of the cemented lens makes the overall structure of the optical lens compact, meeting the requirements of miniaturization, and at the same time can reduce the tolerance sensitivity problems such as tilt and eccentricity of the lens unit caused by the assembly process. The cemented lens can be composed of a positive lens and a negative lens respectively, and the opposite optical power can be used to make the light smoothly transition to the rear lens. In addition, the cemented lens also makes the various aberrations of the optical system fully corrected, and under the premise of compact structure, it can improve the resolution and optimize the optical performance such as distortion and CRA (Chief Ray Angle).

[0102] MTF stands for modulation transfer function, which describes the ability of an optical system to "restore" the object side on the image side. The horizontal axis of the modulation transfer function (MTF) curve is the spatial frequency, and the unit of the spatial frequency is line pairs per millimeter (lp / mm). The vertical axis is the optical modulation function value (i.e., MTF value). The MTF curve of the optical lens provided in this application has an MTF value of the edge field of view of 10lp / mm that is above 0.3, which can meet the required image quality requirements.

[0103] In an exemplary embodiment, as needed, the optical lens of the present application may further include a filter and / or a protective glass disposed between the seventh lens and the imaging surface, the filter may filter light with different wavelengths, and the protective glass may prevent the elements (e.g., chip) on the second side of the optical lens from being damaged.

[0104] In an exemplary embodiment, the first lens to the seventh lens may be a spherical lens or an aspherical lens. The present application does not specifically limit the specific number of spherical lenses and aspherical lenses. When focusing on imaging quality, the number of aspherical lenses can be increased, and even all lenses use aspherical lenses. The characteristic of an aspherical lens is that the curvature changes continuously from the center of the lens to the periphery. Unlike a spherical lens with a constant curvature from the center of the lens to the periphery, an aspherical lens has a better curvature radius characteristic, and has the advantages of improving distortion aberration and improving astigmatism aberration. The setting of an aspherical lens helps to correct system aberrations and improve resolution. For example, the use of an aspherical surface in the first lens and the third lens can better adjust the trend of the edge light so that it can be better focused after passing through the rear lens group. In addition, the glass aspherical surface has good thermal stability. In actual use, it can be combined with the specific application environment of the lens. For example, in a non-high temperature use environment, the first lens can be made of plastic material, which is conducive to maintaining performance while reducing costs and weight.

[0105] In an exemplary embodiment, the first lens to the seventh lens may be a glass lens or a plastic lens. The present application does not specifically limit the specific number of glass lenses and plastic lenses. An optical lens made of glass can suppress the deviation of the back focus of the optical lens with temperature changes to improve the stability of the system. At the same time, the use of glass material can avoid problems such as lens imaging blur caused by high and low temperature changes in the use environment and affecting the normal use of the lens. Specifically, when focusing on temperature performance, the first lens to the seventh lens can all be made of glass. In applications where temperature stability requirements are lower, the first lens to the seventh lens in the optical lens can also be made of plastic. Making optical lenses with plastic can effectively reduce production costs. Of course, the first lens to the seventh lens in the optical lens can also be made of a combination of plastic and glass.

[0106] In an exemplary embodiment, the aspherical surface in the optical lens may be preferably made of plastic material, so that the lens can adjust the imaging position of light of different wavelengths after passing through the lens through the combination of high Abbe number and low Abbe number materials, thereby reducing chromatic aberration.

[0107] According to the above-mentioned embodiment of the present application, the optical lens can have at least one beneficial effect of miniaturization, small FNO, short back focus, low sensitivity, high light throughput, high central illumination, high resolution and high performance through the reasonable setting of parameters such as lens shape and optical focal length.

[0108] However, it should be understood by those skilled in the art that, without departing from the technical solution claimed in the present application, the number of lenses constituting the lens can be changed to obtain the various results and advantages described in this specification. For example, although seven lenses are described as an example in the embodiment, the optical lens is not limited to including seven lenses. If necessary, the optical lens may also include other numbers of lenses. The following further describes specific embodiments of the optical lens applicable to the above-mentioned embodiments with reference to the accompanying drawings.

[0109] Example 1

[0110] The following reference Figure 1 An optical lens according to Embodiment 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.

[0111] like Figure 1 As shown, the optical lens includes 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 in sequence from the first side to the second side along the optical axis.

[0112] The first lens L1 is a convex-concave lens with positive focal 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 positive focal power, whose first side surface S3 is convex and whose second side surface S4 is concave. The third lens L3 is a convex-concave lens with negative focal power, whose first side surface S5 is concave and whose second side surface S6 is concave. The fourth lens L4 is a convex-convex lens with positive focal power, whose first side surface S8 is convex and whose second side surface S9 is convex. The fifth lens L5 is a convex-concave lens with positive focal power, whose first side surface S10 is convex and whose second side surface S11 is concave. The sixth lens L6 is a convex-concave lens with negative focal power, whose first side surface S12 is convex and whose second side surface S13 is concave. The seventh lens L7 is a convex-concave lens with positive focal power, whose first side surface S14 is convex and whose second side surface S15 is concave.

[0113] The optical lens may further include a stop STO, and the stop STO may be disposed between the third lens L3 and the fourth lens L4.

[0114] Table 1 shows the radius of curvature R, thickness / distance (it should be understood that the thickness / distance of the row where S1 is located is the center thickness of the first lens L1, the thickness / distance of the row where S2 is located is the spacing distance between the second side surface S2 of the first lens L1 and the first side surface S3 of the second lens L2, the thickness / distance of the row where S3 is located is the center thickness of the second lens L2, and so on), refractive index Nd, and Abbe number Vd of each lens of the optical lens of Example 1.

[0115] Table 1

[0116]

[0117] Figure 2 A modulation transfer function (MTF) curve of the optical lens of Example 1 is shown, and the optical lens can achieve good imaging quality.

[0118] Example 2

[0119] The following reference Figure 3 The optical lens according to Embodiment 2 of the present application is described. In this embodiment and the following embodiments, for the sake of brevity, some descriptions similar to Embodiment 1 will be omitted. Figure 3 A schematic structural diagram of an optical lens according to Embodiment 2 of the present application is shown.

[0120] In this embodiment, the first lens L1 has positive power, the second lens L2 has positive power, the third lens L3 has negative power, the fourth lens L4 has positive power, the fifth lens L5 has positive power, the sixth lens L6 has negative power, and the seventh lens L7 has positive power. The surface shape of each lens can be obtained according to Table 2, and no further description is given. Table 2 shows the radius of curvature R, thickness / distance, refractive index Nd and Abbe number Vd of each lens of the optical lens of Example 2.

[0121] Table 2

[0122]

[0123] Figure 4 A modulation transfer function (MTF) curve of the optical lens of Example 2 is shown, and the optical lens can achieve good imaging quality.

[0124] Example 3

[0125] The following reference Figure 5 An optical lens according to Example 3 of the present application is described. Figure 5 A schematic structural diagram of an optical lens according to Example 3 of the present application is shown.

[0126] In this embodiment, the first lens L1 has positive focal power, the second lens L2 has positive focal power, the third lens L3 has negative focal power, the fourth lens L4 has positive focal power, the fifth lens L5 has positive focal power, the sixth lens L6 has negative focal power, and the seventh lens L7 has positive focal power. The surface shape of each lens can be obtained according to Table 3, and no further description is given. Table 3 shows the curvature radius R, thickness / distance, refractive index Nd and Abbe number Vd of each lens of the optical lens of Example 3.

[0127] Table 3

[0128]

[0129] Figure 6 A modulation transfer function (MTF) curve of the optical lens of Example 3 is shown, and the optical lens can achieve good imaging quality.

[0130] Example 4

[0131] The following reference Figure 7 An optical lens according to Example 4 of the present application is described. Figure 7 A schematic structural diagram of an optical lens according to Example 4 of the present application is shown.

[0132] In this embodiment, the first lens L1 has positive focal power, the second lens L2 has positive focal power, the third lens L3 has negative focal power, the fourth lens L4 has positive focal power, the fifth lens L5 has positive focal power, the sixth lens L6 has negative focal power, and the seventh lens L7 has positive focal power. The surface shape of each lens can be obtained according to Table 4, and no further description is given. Table 4 shows the curvature radius R, thickness / distance, refractive index Nd and Abbe number Vd of each lens of the optical lens of Example 4.

[0133] Table 4

[0134]

[0135] Figure 8 A modulation transfer function (MTF) curve of the optical lens of Example 4 is shown, and the optical lens can achieve good imaging quality.

[0136] Example 5

[0137] The following reference Fig. 9 An optical lens according to Example 5 of the present application is described. Fig. 9 A schematic structural diagram of an optical lens according to Example 5 of the present application is shown.

[0138] In this embodiment, the first lens L1 has positive power, the second lens L2 has positive power, the third lens L3 has negative power, the fourth lens L4 has positive power, the fifth lens L5 has positive power, the sixth lens L6 has negative power, and the seventh lens L7 has positive power. The surface shape of each lens can be obtained according to Table 5, and will not be repeated here.

[0139] Table 5 shows the curvature radius R, thickness / distance, refractive index Nd and Abbe number Vd of each lens of the optical lens of Example 5.

[0140] Table 5

[0141]

[0142] Fig.10 A modulation transfer function (MTF) curve of the optical lens of Example 5 is shown, and the optical lens can achieve good imaging quality.

[0143] Example 6

[0144] The following reference Fig.11 An optical lens according to Example 6 of the present application is described. Fig.11 A schematic structural diagram of an optical lens according to Example 6 of the present application is shown.

[0145] In this embodiment, the first lens L1 has positive power, the second lens L2 has positive power, the third lens L3 has negative power, the fourth lens L4 has positive power, the fifth lens L5 has positive power, the sixth lens L6 has negative power, and the seventh lens L7 has positive power. The surface shape of each lens can be obtained according to Table 6, which will not be repeated here.

[0146] Table 6 shows the curvature radius R, thickness / distance, refractive index Nd and Abbe number Vd of each lens of the optical lens of Example 6.

[0147] Table 6

[0148]

[0149] Fig.12 A modulation transfer function (MTF) curve of the optical lens of Example 6 is shown, and the optical lens can achieve good imaging quality.

[0150] Example 7

[0151] The following reference Fig.13 An optical lens according to Example 7 of the present application is described. Fig.13 A schematic structural diagram of an optical lens according to Example 7 of the present application is shown.

[0152] In this embodiment, the first lens L1 has positive focal power, the second lens L2 has positive focal power, the third lens L3 has negative focal power, the fourth lens L4 has positive focal power, the fifth lens L5 has positive focal power, the sixth lens L6 has negative focal power, and the seventh lens L7 has positive focal power. Among them, the fifth lens L5 and the sixth lens L6 form a double cemented lens group. The surface shape of each lens can be obtained according to Table 7, which is not repeated here. Table 7 shows the radius of curvature R, thickness / distance, refractive index Nd and Abbe number Vd of each lens of the optical lens of Example 7.

[0153] Table 7

[0154]

[0155] Fig.14 A modulation transfer function (MTF) curve of the optical lens of Example 7 is shown, and the optical lens can achieve good imaging quality.

[0156] Example 8

[0157] The following reference Fig.15 An optical lens according to Example 8 of the present application is described. Fig.15 A schematic structural diagram of an optical lens according to Example 8 of the present application is shown.

[0158] In this embodiment, the first lens L1 has positive focal power, the second lens L2 has positive focal power, the third lens L3 has negative focal power, the fourth lens L4 has positive focal power, the fifth lens L5 has positive focal power, the sixth lens L6 has negative focal power, and the seventh lens L7 has positive focal power. Among them, the fifth lens L5 and the sixth lens L6 form a double cemented lens group. The surface shape of each lens can be obtained according to Table 8, which is not repeated here. Table 8 shows the radius of curvature R, thickness / distance, refractive index Nd and Abbe number Vd of each lens of the optical lens of Example 8.

[0159] Table 8

[0160]

[0161] Fig.16 A modulation transfer function (MTF) curve of the optical lens of Example 8 is shown, and the optical lens can achieve good imaging quality.

[0162] Example 9

[0163] The following reference Fig.17 An optical lens according to Example 9 of the present application is described. Fig.17 A schematic structural diagram of an optical lens according to Example 9 of the present application is shown.

[0164] In this embodiment, the first lens L1 has positive focal power, the second lens L2 has positive focal power, the third lens L3 has negative focal power, the fourth lens L4 has positive focal power, the fifth lens L5 has positive focal power, the sixth lens L6 has negative focal power, and the seventh lens L7 has positive focal power. Among them, the third lens L3 and the fourth lens L4 form a double cemented lens group. The surface shape of each lens can be obtained according to Table 9, which is not repeated here. Table 9 shows the radius of curvature R, thickness / distance, refractive index Nd and Abbe number Vd of each lens of the optical lens of Example 9.

[0165] Table 9

[0166]

[0167] Fig.18 A modulation transfer function (MTF) curve of the optical lens of Example 9 is shown, and the optical lens can achieve good imaging quality.

[0168] Example 10

[0169] The following reference Fig.19 An optical lens according to Example 10 of the present application is described. Fig.19 A schematic structural diagram of an optical lens according to Example 10 of the present application is shown.

[0170] In this embodiment, the first lens L1 has positive focal power, the second lens L2 has positive focal power, the third lens L3 has negative focal power, the fourth lens L4 has positive focal power, the fifth lens L5 has positive focal power, the sixth lens L6 has negative focal power, and the seventh lens L7 has negative focal power. Among them, the third lens L3 and the fourth lens L4 form a double cemented lens group. The surface shape of each lens can be obtained according to Table 10, which is not repeated here. Table 10 shows the radius of curvature R, thickness / distance, refractive index Nd and Abbe number Vd of each lens of the optical lens of Example 10.

[0171] Table 10

[0172]

[0173] Fig. 20 A modulation transfer function (MTF) curve of the optical lens of Example 10 is shown, and the optical lens can achieve good imaging quality.

[0174] Embodiment 11

[0175] The following reference Fig.21 An optical lens according to Example 11 of the present application is described. Fig.21 A schematic structural diagram of an optical lens according to Example 11 of the present application is shown.

[0176] In this embodiment, the first lens L1 has positive focal power, the second lens L2 has positive focal power, the third lens L3 has negative focal power, the fourth lens L4 has positive focal power, the fifth lens L5 has positive focal power, the sixth lens L6 has negative focal power, and the seventh lens L7 has negative focal power. Among them, the third lens L3 and the fourth lens L4 form a double cemented lens group. The surface shape of each lens can be obtained according to Table 11, which is not repeated here. Table 11 shows the radius of curvature R, thickness / distance, refractive index Nd and Abbe number Vd of each lens of the optical lens of Example 11.

[0177] Table 11

[0178]

[0179] Fig. 22 A modulation transfer function (MTF) curve of the optical lens of Example 11 is shown, and the optical lens can achieve good imaging quality.

[0180] In summary, Examples 1 to 11 respectively satisfy the relationship shown in Table 12. In Table 12, the units of F, ENPD, TTL, DST, F1-F7, D1-D7, SAG9, and SAG10 are millimeters (mm), and the unit of FOV is degrees (°).

[0181] Table 12

[0182]

[0183] The optical lens provided in Examples 1 to 11 of the present application can be used as, for example, a vehicle-mounted lens. In this case, IMA in the structural schematic diagram of the optical lens of Examples 1 to 11 represents an imaging surface, and light from an object sequentially passes through the first lens L1 to the seventh lens L7 and is finally imaged on the imaging surface disposed on the second side, wherein an image sensor chip is disposed on the imaging surface. It should be understood that the optical lens provided in Examples 1 to 11 of the present application can also be used as, for example, a projection lens or a laser radar transmitting end lens. In this case, IMA in the structural schematic diagram of Examples 1 to 11 can, for example, represent a light source surface, and light from the light source surface sequentially passes through the seventh lens L7 to the first lens L1 and is finally projected to the first side, for example, forming an image or illuminating an area on the first side.

[0184] The present application also provides an electronic device, which may include an optical lens according to the above-mentioned 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 an independent electronic device such as a detection distance camera, or an imaging module integrated in a device such as a detection distance device. In addition, the electronic device may also be an independent imaging device such as a vehicle-mounted camera, or an imaging module integrated in a driving assistance system, or a laser radar having at least a receiving end.

[0185] The present application also provides an electronic device, which may include an optical lens and a light source according to the above-mentioned embodiment of the present application, and the light emitted by the light source is projected to a target area after passing through the optical lens to form an image or illuminate an area. The electronic device may be a projection module integrated in a mobile electronic device, or an independent projection device such as a projector, or a laser radar having at least a transmitting end.

[0186] The present application also provides an electronic device, which may include an optical lens, an imaging element and a light source according to the above-mentioned embodiment of the present application. The imaging element converts the optical image formed by the optical lens into an imaging element of an electrical signal, and the light emitted by the light source is projected to the target area after passing through the optical lens to form an image or illuminate the area. The electronic device can be, for example, an intelligent headlight in the field of intelligent transportation, which can simultaneously realize imaging, lighting and high-definition projection. The electronic device can also be a laser radar with a transmitting end and a receiving end.

[0187] The above description is only a preferred embodiment of the present application and an explanation of the technical principles used. Those skilled in the art should understand that the scope of the invention involved in the present application is not limited to the technical solution formed by a specific combination of the above technical features, but should also cover other technical solutions formed by any combination of the above technical features or their equivalent features without departing from the inventive concept. For example, the above features are replaced with the technical features with similar functions disclosed in this application (but not limited to) by each other to form a technical solution.

Claims

1. An optical lens, characterized in that: The optical lens includes, in sequence from the first side to the second side along the optical axis: A first lens having optical power, wherein the first side surface of the first lens is convex; a second lens having positive optical power, wherein the first side surface of the second lens is convex; a third lens having negative optical power, wherein the first side surface is concave and the second side surface is concave; a fourth lens having positive power, wherein the first side surface is convex and the second side surface is convex; a fifth lens element having positive optical power, wherein the first side surface of the fifth lens element is convex; and a sixth lens element having negative optical power, wherein the second side surface of the sixth lens element is concave; a seventh lens element having positive refractive power, wherein the first side surface is convex and the second side surface is concave; The number of lenses having optical power in the optical lens is seven; The first side is the object side, the second side is the image side, and the light from the object side is imaged on the image side after passing through the optical lens; or the second side is the light source side, and the light from the light source side is projected to the first side after passing through the optical lens to form an image or illuminate an area; The optical lens satisfies: -2≤F3 / F≤-0.5, 0.25≤R6 / R7≤1.5 and -20≤F1 / F≤20, wherein F3 is the effective focal length of the third lens, F is the effective focal length of the optical lens, R6 is the curvature radius of the second side surface of the third lens, R7 is the curvature radius of the first side surface of the fourth lens, and F1 is the effective focal length of the first lens; The optical lens satisfies: Di>0.9Dj, Among them, i=1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, j=i+1, When i is 1, j=2, D1 represents the light-clearing aperture of the first side surface of the first lens, and D2 represents the light-clearing aperture of the second side surface of the first lens; When i is 2, j=3, D3 represents the clear aperture of the first side surface of the second lens; When i is 3, j=4, D4 represents the clear aperture of the second side surface of the second lens; When i is 4, j=5, D5 represents the clear aperture of the first side surface of the third lens; When i is 5, j=6, D6 represents the clear aperture of the second side surface of the third lens; When i is 6, j=7, D7 represents the clear aperture of the first side surface of the fourth lens; When i is 7, j=8, D8 represents the clear aperture of the second side surface of the fourth lens; When i is 8, j=9, D9 represents the clear aperture of the first side surface of the fifth lens; When i is 9, j=10, D10 represents the clear aperture of the second side surface of the fifth lens; When i is 10, j=11, D11 represents the clear aperture of the first side surface of the sixth lens; When i is 11, j=12, and D12 represents the clear aperture of the second side surface of the sixth lens; When i is 12, j=13, and D13 represents the clear aperture of the first side surface of the seventh lens; When i is 13, j=14, and D14 represents the clear aperture of the second side surface of the seventh lens.

2. The optical lens according to claim 1, characterized in that: The first lens has positive optical power.

3. The optical lens according to claim 1, characterized in that: The first lens has negative optical power.

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

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

6. The optical lens according to claim 1, characterized in that: The second side surface of the second lens is a convex surface, a flat surface or a concave surface.

7. The optical lens according to claim 1, characterized in that: The second side surface of the fifth lens is a convex surface or a concave surface.

8. The optical lens according to claim 1, characterized in that: The first side surface of the sixth lens is a convex surface or a concave surface.

9. The optical lens according to any one of claims 1 to 8, characterized in that: The optical lens satisfies: -1.4≤F3 / F≤-0.

8.

10. The optical lens according to any one of claims 1 to 8, characterized in that: The optical lens satisfies: 0.3≤R6 / R7≤1.

3.

11. The optical lens according to any one of claims 1 to 8, characterized in that: The optical lens satisfies: F / ENPD≤0.9, wherein ENPD is an entrance pupil diameter of the optical lens.

12. The optical lens according to any one of claims 1 to 8, characterized in that: The optical lens satisfies: 1≤DST / F≤1.5, wherein DST is the clear aperture of the aperture of the optical lens.

13. The optical lens according to any one of claims 1 to 8, characterized in that: The optical lens satisfies: 1≤F2 / F≤6, where F2 is the effective focal length of the second lens.

14. The optical lens according to any one of claims 1 to 8, characterized in that: The optical lens satisfies: 0.2≤F7 / F≤1, wherein F7 is the effective focal length of the seventh lens.

15. The optical lens according to any one of claims 1 to 8, characterized in that: The optical lens satisfies: -1.5≤F3 / F4≤-0.5, wherein F4 is the effective focal length of the fourth lens.

16. The optical lens according to any one of claims 1 to 8, characterized in that: The optical lens satisfies: 1.3≤|F5 / F6|≤2.5, wherein F5 is the effective focal length of the fifth lens, and F6 is the effective focal length of the sixth lens.

17. The optical lens according to any one of claims 1 to 8, characterized in that: The optical lens satisfies: 1.5≤(R8-R9) / (R8+R9)≤5, wherein R8 is the radius of curvature of the second side surface of the fourth lens, and R9 is the radius of curvature of the first side surface of the fifth lens.

18. The optical lens according to any one of claims 1 to 8, characterized in that: The optical lens satisfies: |R11 / R12|≥8, wherein R11 is the curvature radius of the first side surface of the sixth lens, and R12 is the curvature radius of the second side surface of the sixth lens.

19. The optical lens according to any one of claims 1 to 8, characterized in that: The optical lens satisfies: 0.3≤R13 / F≤0.8, wherein R13 is the radius of curvature of the first side surface of the seventh lens.

20. The optical lens according to any one of claims 1 to 8, characterized in that: The optical lens satisfies: 0.002≤d2 / F≤0.35, wherein d2 is the air distance between the first lens and the second lens on the optical axis.

21. The optical lens according to any one of claims 1 to 8, characterized in that: The optical lens satisfies at least one of the following conditions: 1.2≤F2 / F≤5.5, -1.4≤F3 / F≤-0.8, 0.5≤F7 / F≤1, 8≤|R11 / R12|≤200, 0.6≤F / ENPD≤0.8, 1.01≤DST / F≤1.45, -0.95≤F3 / F4≤-0.75, 1.5≤|F5 / F6|≤2.3, 1.8≤(R8-R9) / (R8+R9)≤4.3, 1≤|SAG9 / SAG10|≤90, 3≤|SAG9 / SAG10|≤70, 0.02≤(d8+d10+d12) / TTL≤0.065, 0.3≤R6 / R7≤1.3, 0.45≤R13 / F≤0.63, 0.005≤d2 / F≤0.32, 0≤d6 / TTL≤0.5, 0≤d6 / TTL≤0.3, 1≤F12 / F≤3, 1.2≤F12 / F≤2.5, 2≤F34 / F≤25, 3≤F34 / F≤20, -18≤F1 / F≤15, Wherein, ENPD is the entrance pupil diameter of the optical lens, DST is the aperture of the aperture of the optical lens, F2 is the effective focal length of the second lens, F7 is the effective focal length of the seventh lens, F4 is the effective focal length of the fourth lens, F5 is the effective focal length of the fifth lens, F6 is the effective focal length of the sixth lens, R8 is the curvature radius of the second side surface of the fourth lens, R9 is the curvature radius of the first side surface of the fifth lens, R11 is the curvature radius of the first side surface of the sixth lens, R12 is the curvature radius of the second side surface of the sixth lens, d2 is the air gap between the first lens and the second lens on the optical axis, SAG9 is the distance from the intersection of the first side surface of the fifth lens and the optical axis to the fifth lens SAG10 is the distance from the intersection of the second side surface of the fifth lens and the optical axis to the effective radius vertex of the second side surface of the fifth lens on the optical axis, d8 is the air spacing between the fourth lens and the fifth lens on the optical axis, d10 is the air spacing between the fifth lens and the sixth lens on the optical axis, d12 is the air spacing between the sixth lens and the seventh lens on the optical axis, TTL is the total optical length of the optical lens, d6 is the air spacing between the third lens and the fourth lens on the optical axis, F12 is the combined effective focal length of the first lens and the second lens, and F34 is the combined effective focal length of the third lens and the fourth lens.

22. The optical lens according to any one of claims 1 to 8, characterized in that: The optical lens satisfies at least one of the following conditions: 1.30≤F2 / F≤5.10, -1.49≤F3 / F≤-0.79, 0.74≤F7 / F≤0.93, 9.04≤|R11 / R12|≤196.74, 0.68≤F / ENPD≤0.78, 1.17≤DST / F≤1.41, -0.92≤F3 / F4≤-0.72, 1.70≤|F5 / F6|≤2.15, 1.76≤(R8-R9) / (R8+R9)≤4.42, 4.18≤|SAG9 / SAG10|≤68.73, 0.03≤(d8+d10+d12) / TTL≤0.06, 0.31≤R6 / R7≤1.00, 0.50≤R13 / F≤0.63, 0.009≤d2 / F≤0.31, 0≤d6 / TTL≤0.23, 1.51≤F12 / F≤2.22, 3.66≤F34 / F≤18, -16.98≤F1 / F≤13.67, Wherein, ENPD is the entrance pupil diameter of the optical lens, DST is the aperture of the aperture of the optical lens, F2 is the effective focal length of the second lens, F7 is the effective focal length of the seventh lens, F4 is the effective focal length of the fourth lens, F5 is the effective focal length of the fifth lens, F6 is the effective focal length of the sixth lens, R8 is the curvature radius of the second side surface of the fourth lens, R9 is the curvature radius of the first side surface of the fifth lens, R11 is the curvature radius of the first side surface of the sixth lens, R12 is the curvature radius of the second side surface of the sixth lens, d2 is the air gap between the first lens and the second lens on the optical axis, SAG9 is the distance from the intersection of the first side surface of the fifth lens and the optical axis to the fifth lens SAG10 is the distance from the intersection of the second side surface of the fifth lens and the optical axis to the effective radius vertex of the second side surface of the fifth lens on the optical axis, d8 is the air spacing between the fourth lens and the fifth lens on the optical axis, d10 is the air spacing between the fifth lens and the sixth lens on the optical axis, d12 is the air spacing between the sixth lens and the seventh lens on the optical axis, TTL is the total optical length of the optical lens, d6 is the air spacing between the third lens and the fourth lens on the optical axis, F12 is the combined effective focal length of the first lens and the second lens, and F34 is the combined effective focal length of the third lens and the fourth lens.

23. An electronic device, characterized in that: include: The optical lens according to any one of claims 1 to 22, and The electronic device further comprises at least one of an imaging element and a light source, wherein: The imaging element is used to convert the optical image formed by the optical lens into an electrical signal. The light emitted by the light source is projected onto the target area after passing through the optical lens to form an image or illuminate an area.

Images