CN113495342B

CN113495342B - Optical lens and electronic device

Info

Publication number: CN113495342B
Application number: CN202010253163.6A
Authority: CN
Inventors: 马奥林; 王东方; 姚波
Original assignee: Ningbo Sunny Automotive Optech Co Ltd
Current assignee: Ningbo Sunny Automotive Optech Co Ltd
Priority date: 2020-04-02
Filing date: 2020-04-02
Publication date: 2024-04-02
Anticipated expiration: 2040-04-02
Also published as: CN113495342A

Abstract

The application discloses optical lens, this optical lens includes in order along the optical axis from the object side to the image side: the first lens with negative focal power has a convex object side surface and a concave image side surface; the second lens with negative focal power has a concave object side surface and a concave image side surface; a third lens having positive optical power; the object side surface of the fourth lens is a convex surface, and the image side surface of the fourth lens is a convex surface; the object side surface of the fifth lens is a convex surface, and the image side surface of the fifth lens is a convex surface; a sixth lens element with negative refractive power having a concave object-side surface and a concave image-side surface; and a seventh lens having positive optical power.

Description

Optical lens and electronic device

Technical Field

The present disclosure relates to the field of optical elements, and in particular, to an optical lens and an electronic device including the same.

Background

In recent years, automobile auxiliary driving systems have been developed at a high speed, and vehicle-mounted optical lenses have been used as eyes for obtaining external information from automobiles, and have been used as an irreplaceable function. In order to obtain information more accurately, the system needs to be matched with a large chip with higher resolution, so that the requirement on the resolution of the vehicle-mounted optical lens is higher. In order to meet the requirement of higher imaging quality, a structure with a larger number of lenses is often selected, but this brings about an increase in cost and also seriously affects miniaturization of the lens.

In addition, in view of safety, the vehicle-mounted optical lens applied to the automatic driving field has high requirement on stability, and needs to be capable of coping with various severe environments so as to avoid obviously degrading the lens performance under different environments.

Therefore, the market at present needs an optical lens which can be matched with a large chip, has high resolution, and has the characteristics of low cost, miniaturization, small distortion, good temperature performance and the like, and meets the requirements of automatic driving application.

Disclosure of Invention

The present application provides an optical lens applicable to vehicle-mounted and capable of at least solving or partially solving at least one of the above-mentioned drawbacks in the prior art, and an electronic device including the optical lens.

An aspect of the present application provides an optical lens sequentially from an object side to an image side along an optical axis, which may include: the first lens with negative focal power has a convex object side surface and a concave image side surface; the second lens with negative focal power has a concave object side surface and a concave image side surface; a third lens having positive optical power; the object side surface of the fourth lens is a convex surface, and the image side surface of the fourth lens is a convex surface; the object side surface of the fifth lens is a convex surface, and the image side surface of the fifth lens is a convex surface; a sixth lens element with negative refractive power having a concave object-side surface and a concave image-side surface; and a seventh lens having positive optical power.

In one embodiment, the object-side surface of the third lens element may be convex, and the image-side surface may be concave.

In one embodiment, the object-side surface of the third lens element may be convex, and the image-side surface may be convex.

In one embodiment, the object-side surface of the seventh lens element may be concave and the image-side surface may be convex.

In one embodiment, the object-side surface of the seventh lens element may be convex and the image-side surface may be concave.

In one embodiment, the fifth lens and the sixth lens may form a cemented lens.

In one embodiment, at least one lens of the third lens, the fourth lens, and the seventh lens may be an aspherical lens.

In one embodiment, the second lens and the third lens may form a cemented lens.

In one embodiment, the total optical length TTL of the optical lens and the total effective focal length f of the optical lens may satisfy: TTL/f is less than or equal to 7.0.

In one embodiment, the total optical length TTL of the optical lens, the maximum field angle FOV of the optical lens, and the image height H corresponding to the maximum field angle of the optical lens may satisfy: TTL/H/FOV is less than or equal to 0.05.

In one embodiment, the maximum field angle FOV of the optical lens, the maximum light passing aperture D of the object side surface of the first lens corresponding to the maximum field angle of the optical lens, and the image height H corresponding to the maximum field angle of the optical lens may satisfy: D/H/FOV is less than or equal to 0.03.

In one embodiment, the optical back focal length BFL of the optical lens and the total optical length TTL of the optical lens may satisfy: BFL/TTL is more than or equal to 0.15.

In one embodiment, the effective focal length f5 of the fifth lens and the effective focal length f6 of the sixth lens may satisfy: and f5/f6 is more than or equal to 0.5 and less than or equal to 2.0.

In one embodiment, the center thickness dn of the nth lens having the largest center thickness among the first to seventh lenses and the center thickness dm of the mth lens having the smallest center thickness among the first to seventh lenses may satisfy: 4.0.ltoreq.dn/dm.ltoreq.8.0, where n and m are selected from 1, 2, 3, 4, 5, 6, 7.

In one embodiment, the combined focal length f56 of the fifth lens and the sixth lens and the total effective focal length f of the optical lens may satisfy: and the f56/f is more than or equal to 2.0.

In one embodiment, the total effective focal length f of the optical lens, the maximum field angle FOV of the optical lens, and the image height H corresponding to the maximum field angle of the optical lens may satisfy: (FOV x f)/H is less than or equal to 65.0.

In one embodiment, the optical total length TTL of the optical lens and the separation distance d11 between the sixth lens and the seventh lens on the optical axis may satisfy: d11/TTL is more than or equal to 0.01.

In one embodiment, the maximum light passing half diameter D12 of the object side surface of the seventh lens element corresponding to the maximum field angle of the optical lens element, the Sg value SAG12 corresponding to the D12, the maximum light passing half diameter D13 of the image side surface of the seventh lens element corresponding to the maximum field angle of the optical lens element, and the Sg value SAG13 corresponding to the D13 may satisfy 0.3+.arctan (SAG 12/D12)/arctan (SAG 13/D13). Ltoreq.3.0.

Another aspect of the present application provides an optical lens sequentially from an object side to an image side along an optical axis, which may include: the first lens is convex on the object side surface and concave on the image side surface; the object side surface of the second lens is a concave surface, and the image side surface of the second lens is a concave surface; a third lens; a fourth lens element with a convex object-side surface and a convex image-side surface; a fifth lens element with a convex object-side surface and a convex image-side surface; a sixth lens element with a concave object-side surface and a concave image-side surface; and a seventh lens. The optical total length TTL of the optical lens and the distance d11 between the sixth lens and the seventh lens on the optical axis may satisfy: d11/TTL is more than or equal to 0.01.

In one embodiment, the third lens element may have positive optical power, and the object-side surface thereof may be convex and the image-side surface thereof may be concave.

In one embodiment, the third lens element may have positive optical power, and the object-side surface thereof may be convex, and the image-side surface thereof may be convex.

In one embodiment, the seventh lens may have positive optical power, the object-side surface thereof may be concave, and the image-side surface thereof may be convex.

In one embodiment, the seventh lens may have positive optical power, the object-side surface thereof may be convex, and the image-side surface thereof may be concave.

In one embodiment, the fifth lens and the sixth lens may form a cemented lens.

In one embodiment, the second lens and the third lens may form a cemented lens.

Yet another aspect of the present application provides an electronic device including an optical lens as described above and an imaging element for converting an optical image formed by the optical lens into an electrical signal.

Firstly, the optical lens provided by the application adopts a plurality of lenses, such as the first lens to the seventh lens, and the optical lens can achieve the beneficial effects of miniaturization, low sensitivity, high generation yield, low generation cost and the like while meeting the requirement of high resolution by reasonably optimizing the shape of each lens of the optical lens and reasonably distributing the focal power of each lens. Secondly, the optical lens provided by the application has a larger aperture, and even in a weak light environment, the image can be ensured to have higher definition. And the optical lens provided by the application has good temperature performance, works at high temperature and low temperature, has small imaging effect change and has stable imaging quality. In addition, the optical lens provided by the application ensures that the distance of back focus is long enough under the condition that the total length of the lens is short, and is easy to assemble and adjust.

Drawings

Other features, objects and advantages of the present application will become more apparent from the following detailed description of non-limiting embodiments, taken in conjunction with the accompanying drawings. In the drawings:

fig. 1 shows a schematic structural view of an optical lens according to embodiment 1 of the present application;

fig. 2 shows a schematic structural view of an optical lens according to embodiment 2 of the present application;

Fig. 3 shows a schematic structural view of an optical lens according to embodiment 3 of the present application;

fig. 4 shows a schematic structural view of an optical lens according to embodiment 4 of the present application;

fig. 5 shows a schematic structural view of an optical lens according to embodiment 5 of the present application; and

fig. 6 shows a schematic structural view of an optical lens according to embodiment 6 of the present application.

Detailed Description

For a better understanding of the present application, various aspects of the present application will be described in more detail with reference to the accompanying drawings. It should be understood that these detailed description are merely illustrative of exemplary embodiments of the application and are not intended to limit the scope of the application in any way. Like reference numerals refer to like elements throughout the specification. The expression "and/or" includes any and all combinations of one or more of the associated listed items.

It should be noted that in the present 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 feature. Accordingly, a first lens discussed below may also be referred to as a second lens or a third lens without departing from the teachings of the present application.

In the drawings, the thickness, size, and shape of the lenses have been slightly exaggerated for convenience of explanation. In particular, the spherical or aspherical shape shown in the drawings is shown by way of example. That is, the shape of the spherical or aspherical surface is not limited to the shape of the spherical or aspherical surface shown in the drawings. The figures are merely examples and are not drawn to scale.

Herein, the paraxial region refers to a region near the optical axis. If the lens surface is convex and the convex position is not defined, then 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 surface of each lens closest to the object is referred to as the object side of the lens, and the surface of each lens closest to the imaging plane is referred to as the image side of the lens.

It will be further understood that the terms "comprises," "comprising," "includes," "including," "having," "containing," and/or "including," when used in this specification, specify the presence of stated features, elements, and/or components, but do not preclude the presence or addition of one or more other features, elements, components, and/or groups thereof. Furthermore, when a statement such as "at least one of the following" appears after a list of features that are listed, the entire listed feature is modified instead of modifying a separate element in the list. Furthermore, when describing embodiments of the present application, use of "may" means "one or more embodiments of the present application. Also, the term "exemplary" is intended to refer to an example or illustration.

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

It should be noted that, in the case of no conflict, the embodiments and features in the embodiments may be combined with each other. The present application will be described in detail below with reference to the accompanying drawings in conjunction with embodiments.

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

The optical lens according to the exemplary embodiment of the present application may include seven lenses having optical power, i.e., a first lens, a second lens, a third lens, a fourth lens, a fifth lens, a sixth lens, and a seventh lens. The seven lenses are arranged in sequence from the object side to the image side along the optical axis.

The optical lens according to the exemplary embodiments of the present application may further include a photosensitive element disposed at the imaging surface. Alternatively, the photosensitive element provided to the imaging surface may be a photosensitive coupling element (CCD) or a complementary metal oxide semiconductor element (CMOS).

The first lens element may have negative refractive power, wherein an object-side surface thereof may be convex and an image-side surface thereof may be concave. The first lens can avoid excessive divergence of object light, is favorable for controlling the caliber of the rear lens, and realizes the miniaturized design of the optical lens. The first lens is arranged in a meniscus shape, and can collect light of a large field of view as much as possible to enter the rear system, so that the light passing amount can be effectively increased. In addition, the object side surface of the first lens is arranged to be convex, so that the sliding of water drops is facilitated in the actual use environment (such as rainy and snowy weather, etc.), and the influence of the severe environment on imaging can be effectively reduced. The first lens is preferably a material having a high refractive index and a high hardness. The aspherical lens has a better curvature radius characteristic, and at least one or both of an object side surface and an image side surface of the first lens can be arranged as an aspherical mirror surface in use so as to further improve the resolution quality of the lens.

The second lens element may have negative refractive power, wherein the object-side surface thereof may be concave, and the image-side surface thereof may be concave.

The third lens may have positive optical power. In an exemplary embodiment, both the object side and the image side of the third lens may be convex. In an exemplary embodiment, the object-side surface of the third lens may be convex, and the image-side surface may be concave. Optionally, at least one or both of the object side and the image side of the third lens may be an aspherical mirror.

The fourth lens element with positive refractive power has a convex object-side surface and a convex image-side surface. The fourth lens is arranged as a biconvex lens, which is beneficial for converging and smoothly transitioning light rays to the rear lens. By controlling the effective focal length of the fourth lens, the light rays from the first lens to the fourth lens can be controlled, and the system structure is more compact. At least one of the object-side surface and the image-side surface of the fourth lens element may be arranged as an aspherical mirror surface in use to further enhance the resolution quality of the lens.

The fifth lens element may have positive refractive power, wherein an object-side surface thereof may be convex, and an image-side surface thereof may be convex.

The sixth lens element may have negative refractive power, wherein the object-side surface thereof may be concave and the image-side surface thereof may be concave.

The seventh lens may have a positive optical power that facilitates converging and smooth transition of light rays passing through the front system to the imaging surface. Arranging the seventh lens in a meniscus shape enables efficient control of the Chief Ray Angle (coef-Ray-Angle) of the system, making the seventh lens and the chip more matched. At least one of the object side and the image side of the seventh lens is preferably arranged in use as an aspherical mirror surface to further enhance the resolution quality of the lens.

As known to those skilled in the art, cemented lenses may be used to minimize chromatic aberration or eliminate chromatic aberration. The use of the cemented lens in the optical lens can improve the image quality and reduce the reflection loss of light energy, thereby improving the imaging definition of the lens. In addition, the use of the cemented lens can also simplify the assembly procedure in the lens manufacturing process.

In an exemplary embodiment, the third lens and the fourth lens may be combined into a cemented lens by cementing the image side of the second lens with the object side of the third lens. By introducing a cemented lens, the air space between the lenses can be reduced, making the overall system more compact; meanwhile, the assembly parts between the second lens and the third lens are reduced, so that the processing procedures can be reduced, and the cost of the optical lens is reduced; in addition, tolerance sensitivity problems such as inclination, core deviation and the like generated in the assembling process of the lens units can be reduced; in addition, the light quantity loss caused by reflection between lenses can be reduced, and the illumination is improved; second, it is also possible to eliminate chromatic aberration, and residual partial chromatic aberration to balance chromatic aberration of the system. In the cemented lens, the second lens near the object side may have negative power, and the third lens near the image side may have positive power, which is advantageous for smoothly transitioning light rays to the rear lens.

In addition, the fifth lens and the sixth lens may be combined into a cemented lens by cementing the image side surface of the fifth lens with the object side surface of the sixth lens. By introducing a cemented lens, the air space between the lenses can be reduced, making the overall system more compact; meanwhile, the assembly parts between the fifth lens and the sixth lens are reduced, so that the processing procedures can be reduced, and the cost of the optical lens is reduced; in addition, tolerance sensitivity problems such as inclination, core deviation and the like generated in the assembling process of the lens units can be reduced; in addition, the light quantity loss caused by reflection between lenses can be reduced, and the illumination is improved; second, it is also possible to eliminate chromatic aberration, and residual partial chromatic aberration to balance chromatic aberration of the system. In the cemented lens, the fifth lens near the object side may have positive optical power, and the sixth lens near the image side may have negative optical power, which is advantageous for smoothly transitioning light rays to the rear lens.

By using the glue, the overall chromatic aberration correction of the sharing system is facilitated, so that the aberration can be effectively corrected to improve the resolution. And after the cementing piece is used, the whole optical system can be compact, so that the miniaturization requirement is better met.

In an exemplary embodiment, a diaphragm may be disposed between, for example, the fourth lens and the fifth lens, which is advantageous in increasing the aperture of the diaphragm to further improve the imaging quality of the lens. The light entering the optical system can be effectively converged, and the caliber of the lens is reduced. It should be appreciated that the stop position is not limited to the above-described position, but may be arranged at any other position as desired, for example, the stop may also be arranged between the third lens and the fourth lens.

Optionally, the optical lens may further include a filter for correcting color deviation and/or a protective glass for protecting a photosensitive element located on the imaging surface.

In an exemplary embodiment, the object side surface and the image side surface of at least one of the third lens, the fourth lens, and the seventh lens may be aspherical. The aspherical lens is characterized in that: the curvature varies continuously from the center to the periphery of the lens. Unlike a spherical lens having a constant curvature from the center to the periphery of the lens, an aspherical lens has a better radius of curvature characteristic, and has advantages of improving distortion aberration and improving astigmatic aberration. After the aspheric lens is adopted, aberration generated during imaging can be eliminated as much as possible, and therefore imaging quality of the lens is improved. For example, at least two of the third lens, the fourth lens, and the seventh lens may employ an aspherical lens to further improve the resolution quality. However, in order to improve imaging quality, the number of aspherical lenses of the optical lens according to the present application may be increased. For example, in the case where importance is given to annotating image quality and reliability, aspherical lenses such as glass aspherical lenses may be employed for each of the first to seventh lenses.

In an exemplary embodiment, the optical total length TTL of the optical lens (i.e., the distance on the optical axis from the center of the object side surface of the first lens to the imaging surface of the optical lens) and the total effective focal length f of the optical lens may satisfy: TTL/f is less than or equal to 7.0. For example, TTL/f.ltoreq.6.0. The correlation between the total optical length of the optical lens and the total effective focal length of the optical lens is reasonably controlled, so that the total size of the optical lens can be effectively reduced while a larger focal length is obtained, and the ultra-thin characteristic and miniaturization of the long-focus optical lens are realized.

In an exemplary embodiment, the optical total length TTL of the optical lens, the maximum field angle FOV of the optical lens, and the image height H corresponding to the maximum field angle of the optical lens may satisfy: TTL/H/FOV is less than or equal to 0.05. For example, TTL/H/FOV is less than or equal to 0.04. The correlation among the total optical length of the optical lens, the maximum field angle of the optical lens and the image height corresponding to the maximum field angle of the optical lens is reasonably controlled, so that the miniaturization of the optical system is facilitated, and the size of the optical lens can be effectively reduced under the conditions of identical imaging surfaces and identical image heights.

In an exemplary embodiment, the maximum field angle FOV of the optical lens, the maximum light passing aperture D of the object side surface of the first lens corresponding to the maximum field angle of the optical lens, and the image height H corresponding to the maximum field angle of the optical lens may satisfy: D/H/FOV is less than or equal to 0.03. For example, D/H/FOV is less than or equal to 0.02. The correlation among the maximum field angle of the optical lens, the maximum light-transmitting half caliber of the object side surface of the first lens corresponding to the maximum field angle of the optical lens and the image height corresponding to the maximum field angle of the optical lens is reasonably controlled, so that the small caliber of the front end of the optical lens can be ensured.

In an exemplary embodiment, the optical back focal length BFL of the optical lens (i.e., the distance on the optical axis from the center of the image side of the seventh lens to the imaging surface of the optical lens) and the optical total length TTL of the optical lens may satisfy: BFL/TTL is more than or equal to 0.15. For example, BFL/TTL is ≡0.2. The ratio of the optical back focal length of the optical lens to the total optical length of the optical lens is controlled within a reasonable numerical range, so that the back focal length of the optical lens can be ensured on the basis of miniaturization of the system, and the system assembly is facilitated.

In an exemplary embodiment, the effective focal length f5 of the fifth lens and the effective focal length f6 of the sixth lens may satisfy: and f5/f6 is more than or equal to 0.5 and less than or equal to 2.0. For example, 0.5.ltoreq.f5/f6.ltoreq.1.5. The ratio of the effective focal lengths of the five lenses to the effective focal length of the sixth lens is controlled within a reasonable numerical range, so that the focal lengths of the two lenses in the cemented lens are similar, smooth and excessive light rays are facilitated, and chromatic aberration of the system is corrected.

In an exemplary embodiment, the center thickness dn of the nth lens having the largest center thickness among the first to seventh lenses and the center thickness dm of the mth lens having the smallest center thickness among the first to seventh lenses may satisfy: 4.0.ltoreq.dn/dm.ltoreq.8.0, where n and m are selected from 1, 2, 3, 4, 5, 6, 7. For example, 5.0.ltoreq.dn/dm.ltoreq.7.0, where n and m are selected from 1, 2, 3, 4, 5, 6, 7. Through the central thickness of each lens of rational control, can guarantee that the thickness of each lens is even, the effect is stable, helps guaranteeing that the system all has better imaging quality under different temperature conditions (i.e. the change of high low temperature is less to the deflection angle change of light), for the camera lens has better temperature performance.

In an exemplary embodiment, the combined focal length f56 of the fifth lens and the sixth lens and the total effective focal length f of the optical lens may satisfy: and the f56/f is more than or equal to 2.0. For example, |f56/f|ε.gtoreq.3.0. The relation between the combined focal length of the fifth lens and the sixth lens and the total effective focal length of the optical lens is reasonably controlled, so that the combined focal length of the cemented lens can be reasonably distributed, and the thermal compensation of the system can be realized.

In an exemplary embodiment, the total effective focal length f of the optical lens, the maximum field angle FOV of the optical lens, and the image height H corresponding to the maximum field angle of the optical lens may satisfy: (FOV x f)/H is less than or equal to 65.0. For example, (FOV x f)/H.ltoreq.60.0. The correlation among the total effective focal length of the optical lens, the maximum field angle of the optical lens and the image height corresponding to the maximum field angle of the optical lens is reasonably controlled, so that the system is facilitated to match with a larger chip, and the characteristics of small distortion, long focus and the like are realized.

In an exemplary embodiment, the optical total length TTL of the optical lens and the separation distance d11 of the sixth lens and the seventh lens on the optical axis may satisfy: d11/TTL is more than or equal to 0.01. For example, d11/TTL is ≡0.015. When the ratio of the total optical length of the optical lens to the air space between the sixth lens and the seventh lens on the optical axis is in a reasonable range, the sixth lens and the seventh lens can be separated by a reasonable distance, so that the risk of generating ghost images of the system is reduced and the assembly of the system is facilitated.

In the exemplary embodiment, the maximum light-transmitting half-aperture D12 of the object side surface of the seventh lens element corresponding to the maximum field angle of the optical lens element and the Sg value SAG12 corresponding to the maximum light-transmitting half-aperture D12, and the maximum light-transmitting half-aperture D13 of the image side surface of the seventh lens element corresponding to the maximum field angle of the optical lens element and the Sg value SAG13 corresponding to the maximum light-transmitting half-aperture D13 may satisfy: 0.3.ltoreq.arctan (SAG 12/D12)/arctan (SAG 13/D13). Ltoreq.3.0. For example, 0.5.ltoreq.arctan (SAG 12/D12)/arctan (SAG 13/D13). Ltoreq.2.0. The object side surface and the image side surface of the seventh lens are reasonably controlled to be high in height and the maximum light transmission half caliber, so that the edge opening angles of the object side surface and the image side surface of the seventh lens are close to each other, peripheral light rays can be smoothly transited, and the sensitivity of the seventh lens is reduced.

In an exemplary embodiment, the refractive index Nd1 of the first lens may satisfy: nd1 is more than or equal to 1.6 and less than or equal to 1.9. For example, 1.65.ltoreq.Nd1.ltoreq.1.85. By reasonably controlling the value of the refractive index of the first lens, the first lens can have a higher refractive index, which is beneficial to reducing the front end caliber of the system and improving the imaging quality.

In an exemplary embodiment, the radius of curvature R1 of the object side surface of the first lens, the radius of curvature R2 of the image side surface of the first lens, and the center thickness d1 of the first lens on the optical axis may satisfy: R1/(R2+d1) is not less than 1.6. For example, R1/(R2+d1). Gtoreq.2.0.

The optical lens according to the above-described embodiments of the present application may employ a plurality of lenses, such as seven lenses described above. By reasonably distributing the focal power, the surface shape, the center thickness of each lens, the axial spacing between each lens and the like of each lens, incident light rays can be effectively converged, the optical total length of the optical lens is shortened, and the processability of the optical lens is improved, so that the optical lens is more beneficial to production and processing. The optical lens according to the above embodiments of the present application may have characteristics such as high resolution, low cost, long back focus, excellent temperature performance, miniaturization, large aperture, small aperture at the front end, reasonable use of a cemented member, simple structure, and the like.

However, those skilled in the art will appreciate that the number of lenses making up an optical lens can be varied to achieve the various results and advantages described in the specification without departing from the technical solutions claimed herein. For example, although seven lenses are described as an example in the embodiment, the optical lens is not limited to including seven lenses. The optical lens may also include other numbers of lenses, if desired.

Specific examples of the optical lens applicable to the above-described embodiments are further described below with reference to the accompanying drawings.

Example 1

An optical lens according to embodiment 1 of the present application is described below with reference to fig. 1. Fig. 1 is a schematic diagram showing the structure of an optical lens according to embodiment 1 of the present application.

As shown in fig. 1, the optical lens sequentially includes, from an object side to an image side along an optical axis: a first lens L1, a second lens L2, a third lens L3, a fourth lens L4, a stop STO, a fifth lens L5, a sixth lens L6, and a seventh lens L7.

The first lens element L1 has a meniscus lens element with negative refractive power, a convex object-side surface S1 and a concave image-side surface S2, and both the object-side surface S1 and the image-side surface S2 of the first lens element L1 are spherical surfaces.

The second lens element L2 has a concave object-side surface S3 and a concave image-side surface S4, and the object-side surface S3 and the image-side surface S4 of the second lens element L2 are both spherical surfaces.

The third lens element L3 has a positive refractive power, wherein an object-side surface S4 thereof is convex, an image-side surface S5 thereof is concave, and both the object-side surface S4 and the image-side surface S5 of the third lens element L3 are spherical.

The fourth lens element L4 has a convex object-side surface S6 and a convex image-side surface S7, and the fourth lens element L4 has an aspheric object-side surface S6 and an image-side surface S7.

The fifth lens element L5 has a convex object-side surface S9 and a convex image-side surface S10, and the object-side surface S9 and the image-side surface S10 of the fifth lens element L5 are spherical surfaces.

The sixth lens element L6 has a concave object-side surface S10 and a concave image-side surface S11, and the object-side surface S10 and the image-side surface S11 of the sixth lens element L6 are spherical surfaces.

The seventh lens L7 is a meniscus lens with positive focal power, the object side surface S12 is a concave surface, the image side surface S13 is a convex surface, and the object side surface S12 and the image side surface S13 of the seventh lens L7 are both aspheric.

In the present embodiment, the second lens L2 and the third lens L3 are cemented to constitute a first cemented lens. The fifth lens L5 and the sixth lens L6 are combined into a second cemented lens.

Optionally, the optical lens may further include a filter L8 having an object side surface S14 and an image side surface S15 and/or a protective glass L9 having an object side surface S16 and an image side surface S17. The filter L8 may be used to correct color deviation. The cover glass L9 may be used to protect the image sensing chip located on the imaging surface. Light from the object passes sequentially through the respective surfaces S1 to S17 and is finally imaged on the imaging plane IMA.

In the optical lens of the present embodiment, the stop STO may be disposed between the fourth lens L4 and the fifth lens L5 to further improve the imaging quality.

Table 1 shows the basic parameter table of the optical lens of embodiment 1, in which the units of radius of curvature, thickness/distance, and focal length are all millimeters (mm).

TABLE 1

In the present embodiment, the maximum field angle FOV of the optical lens=94.6°. Table 2 below shows the total effective focal length f of the optical lens of example 1, the total optical length TTL of the optical lens (i.e., the distance on the optical axis from the center of the object side surface S1 of the first lens L1 to the imaging surface IMA), the image height H corresponding to the maximum field angle of the optical lens, the maximum light-transmitting aperture D of the object side surface S1 of the first lens corresponding to the maximum field angle of the optical lens, the optical back focus BFL of the optical lens (i.e., the distance on the optical axis from the center of the image side surface S13 of the seventh lens element to the image plane IMA), the maximum light-transmitting half-aperture D12 of the object side surface S12 of the seventh lens element L7 corresponding to the maximum field angle of the optical lens element, the Sg value SAG12 corresponding to the maximum light-transmitting half-aperture D12, the maximum light-transmitting half-aperture D13 of the image side surface S13 of the seventh lens element L7 corresponding to the maximum field angle of the optical lens element, the Sg value SAG13 corresponding to the maximum light-transmitting half-aperture D13, and the effective focal length f56 of the cemented lens element composed of the fifth lens element L5 and the sixth lens element L6, wherein the units of TTL, f, H, D, BFL, SAG, D12, SAG13, D13, f56 are millimeters (mm).

Parameters (parameters)	TTL	f	H	D	BFL	SAG12	D12	SAG13	D13	f56
											Numerical value	30.68	5.67	9.65	11.65	9.06	-0.56	3.62	-0.57	3.78	21.61

TABLE 2

In embodiment 1, the object side surface and the image side surface of the fourth lens element L4 and the seventh lens element L7 are aspheric, and the surface profile Z of each aspheric lens element can be defined by, but not limited to, the following aspheric formula:

Wherein Z is the distance vector height from the vertex of the aspheric surface when the aspheric surface is at the position with the height h along the optical axis direction; c is the paraxial curvature of the aspheric surface, c=1/R (i.e., paraxial curvature c is the inverse of radius of curvature R in table 1 above); k is the conic coefficient conic; A. b, C, D, E, F are all high order coefficients. Table 2 below shows the cone coefficients k and the respective higher order term coefficients A, B, C, D, E and F that can be used for the aspherical lens surfaces S6, S7, S12 and S13 in example 1.

Face number

k

A

B

C

D

E

F

S6

-0.1190

3.6493E-06

9.4132E-06

-1.0052E-06

7.8095E-08

-2.8314E-09

4.4551E-11

S7

2.2492

4.4303E-04

7.9139E-06

-5.4714E-07

4.5119E-08

-1.6028E-09

2.6810E-11

S12

-1.7411

-1.7964E-03

4.8238E-07

-1.0240E-05

1.6131E-06

-8.4444E-08

1.6586E-09

S13

-46.0125

-4.4043E-03

6.1406E-04

-7.4503E-05

6.3451E-06

-2.8276E-07

5.2582E-09

TABLE 3 Table 3

Example 2

An optical lens according to embodiment 2 of the present application is described below with reference to fig. 2. Fig. 2 is a schematic diagram showing the structure of an optical lens according to embodiment 2 of the present application.

As shown in fig. 2, the optical lens sequentially includes, from an object side to an image side along an optical axis: a first lens L1, a second lens L2, a third lens L3, a fourth lens L4, a stop STO, a fifth lens L5, a sixth lens L6, and a seventh lens L7.

Table 4 shows the basic parameter table of the optical lens of example 2, in which the units of radius of curvature, thickness/distance, and focal length are all millimeters (mm).

TABLE 4 Table 4

In the present embodiment, the maximum field angle FOV of the optical lens=94.6°. Table 5 below shows the total effective focal length f of the optical lens of example 2, the total optical length TTL of the optical lens (i.e., the distance on the optical axis from the center of the object side surface S1 of the first lens L1 to the imaging surface IMA), the image height H corresponding to the maximum field angle of the optical lens, the maximum light-transmitting aperture D of the object side surface S1 of the first lens corresponding to the maximum field angle of the optical lens, the optical back focus BFL of the optical lens (i.e., the distance on the optical axis from the center of the image side surface S13 of the seventh lens element to the image plane IMA), the maximum light-transmitting half-aperture D12 of the object side surface S12 of the seventh lens element L7 corresponding to the maximum field angle of the optical lens element, the Sg value SAG12 corresponding to the maximum light-transmitting half-aperture D12, the maximum light-transmitting half-aperture D13 of the image side surface S13 of the seventh lens element L7 corresponding to the maximum field angle of the optical lens element, the Sg value SAG13 corresponding to the maximum light-transmitting half-aperture D13, and the effective focal length f56 of the cemented lens element composed of the fifth lens element L5 and the sixth lens element L6, wherein the units of TTL, f, H, D, BFL, SAG, D12, SAG13, D13, f56 are millimeters (mm).

Parameters (parameters)	TTL	f	H	D	BFL	SAG12	D12	SAG13	D13	f56
											Numerical value	30.22	6.02	9.67	13.25	6.97	-0.50	3.64	-0.57	3.82	19.04

TABLE 5

In embodiment 2, the object side surface and the image side surface of the fourth lens element L4 and the seventh lens element L7 are aspheric, and the surface profile Z of each aspheric lens element can be defined by, but not limited to, the formula (1) in embodiment 1. The cone coefficients k and the higher order coefficients A, B, C, D, E and F that can be used for each of the aspherical mirror surfaces S6, S7, S12 and S13 in example 2 are given in table 6 below.

Face number

k

A

B

C

D

E

F

S6

-0.1213

2.1874E-06

6.6088E-06

-6.2014E-07

4.1791E-08

-1.3059E-09

1.8619E-11

S7

2.2231

3.6076E-04

5.6562E-06

-3.3374E-07

2.4227E-08

-7.4568E-10

1.0955E-11

S12

-1.7860

-1.4597E-03

5.9567E-07

-6.2918E-06

8.6458E-07

-3.9305E-08

6.7912E-10

S13

-46.0804

-3.5734E-03

4.3396E-04

-4.5835E-05

3.3975E-06

-1.3164E-07

2.1231E-09

TABLE 6

Example 3

An optical lens according to embodiment 3 of the present application is described below with reference to fig. 3. Fig. 3 is a schematic diagram showing the structure of an optical lens according to embodiment 3 of the present application.

As shown in fig. 3, the optical lens sequentially includes, from an object side to an image side along an optical axis: a first lens L1, a second lens L2, a third lens L3, a fourth lens L4, a stop STO, a fifth lens L5, a sixth lens L6, and a seventh lens L7.

The third lens element L3 has a convex object-side surface S4 and a convex image-side surface S5, and the object-side surface S4 and the image-side surface S5 of the third lens element L3 are spherical surfaces.

Table 7 shows the basic parameter table of the optical lens of example 3, in which the units of radius of curvature, thickness/distance, and focal length are all millimeters (mm).

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TABLE 7

In the present embodiment, the maximum field angle FOV of the optical lens=94.6°. Table 8 below shows the total effective focal length f of the optical lens of example 3, the total optical length TTL of the optical lens (i.e., the distance on the optical axis from the center of the object side surface S1 of the first lens L1 to the imaging surface IMA), the image height H corresponding to the maximum field angle of the optical lens, the maximum light-transmitting aperture D of the object side surface S1 of the first lens corresponding to the maximum field angle of the optical lens, the optical back focus BFL of the optical lens (i.e., the distance on the optical axis from the center of the image side surface S13 of the seventh lens element to the image plane IMA), the maximum light-transmitting half-aperture D12 of the object side surface S12 of the seventh lens element L7 corresponding to the maximum field angle of the optical lens element, the Sg value SAG12 corresponding to the maximum light-transmitting half-aperture D12, the maximum light-transmitting half-aperture D13 of the image side surface S13 of the seventh lens element L7 corresponding to the maximum field angle of the optical lens element, the Sg value SAG13 corresponding to the maximum light-transmitting half-aperture D13, and the effective focal length f56 of the cemented lens element composed of the fifth lens element L5 and the sixth lens element L6, wherein the units of TTL, f, H, D, BFL, SAG, D12, SAG13, D13, f56 are millimeters (mm).

Parameters (parameters)	TTL	f	H	D	BFL	SAG12	D12	SAG13	D13	f56
											Numerical value	30.61	5.75	9.74	13.18	7.79	-0.40	3.36	-0.74	3.69	44.19

TABLE 8

In embodiment 3, the object side surface and the image side surface of the fourth lens element L4 and the seventh lens element L7 are aspheric, and the surface profile Z of each aspheric lens element can be defined by, but not limited to, the formula (1) in embodiment 1. The cone coefficients k and the higher order coefficients A, B, C, D, E and F that can be used for each of the aspherical mirror surfaces S6, S7, S12 and S13 in example 3 are given in table 9 below.

Face number

k

A

B

C

D

E

F

S6

0.3021

4.9267E-05

6.3012E-06

-6.7611E-07

6.8210E-08

-3.0284E-09

6.1602E-11

S7

0.8087

4.0602E-04

8.2887E-06

-1.0699E-06

1.2741E-07

-6.4435E-09

1.5569E-10

S12

-99.0001

-1.9651E-03

-4.2119E-07

-1.0525E-05

1.2487E-06

-5.4109E-08

1.4878E-09

S13

-34.4625

-4.6778E-03

5.7641E-04

-6.8406E-05

5.2948E-06

-2.1588E-07

3.8361E-09

TABLE 9

Example 4

An optical lens according to embodiment 4 of the present application is described below with reference to fig. 4. Fig. 4 is a schematic diagram showing the structure of an optical lens according to embodiment 4 of the present application.

As shown in fig. 4, the optical lens sequentially includes, from an object side to an image side along an optical axis: a first lens L1, a second lens L2, a third lens L3, a fourth lens L4, a stop STO, a fifth lens L5, a sixth lens L6, and a seventh lens L7.

Table 10 shows the basic parameter table of the optical lens of example 4, in which the units of radius of curvature, thickness/distance, and focal length are all millimeters (mm).

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Table 10

In the present embodiment, the maximum field angle FOV of the optical lens=94.6°. Table 11 below shows the total effective focal length f of the optical lens of example 4, the total optical length TTL of the optical lens (i.e., the distance on the optical axis from the center of the object side surface S1 of the first lens L1 to the imaging surface IMA), the image height H corresponding to the maximum field angle of the optical lens, the maximum light-transmitting aperture D of the object side surface S1 of the first lens corresponding to the maximum field angle of the optical lens, the optical back focus BFL of the optical lens (i.e., the distance on the optical axis from the center of the image side surface S13 of the seventh lens element to the image plane IMA), the maximum light-transmitting half-aperture D12 of the object side surface S12 of the seventh lens element L7 corresponding to the maximum field angle of the optical lens element, the Sg value SAG12 corresponding to the maximum light-transmitting half-aperture D12, the maximum light-transmitting half-aperture D13 of the image side surface S13 of the seventh lens element L7 corresponding to the maximum field angle of the optical lens element, the Sg value SAG13 corresponding to the maximum light-transmitting half-aperture D13, and the effective focal length f56 of the cemented lens element composed of the fifth lens element L5 and the sixth lens element L6, wherein the units of TTL, f, H, D, BFL, SAG, D12, SAG13, D13, f56 are millimeters (mm).

Parameters (parameters)	TTL	f	H	D	BFL	SAG12	D12	SAG13	D13	f56
											Numerical value	30.58	5.60	9.67	11.88	9.08	-0.48	3.37	-0.79	3.68	61.22

TABLE 11

In embodiment 4, the object side surface and the image side surface of the fourth lens element L4 and the seventh lens element L7 are aspheric, and the surface profile Z of each aspheric lens element can be defined by, but not limited to, the formula (1) in embodiment 1. The cone coefficients k and the higher order coefficients A, B, C, D, E and F that can be used for each of the aspherical mirror surfaces S6, S7, S12 and S13 in example 4 are given in table 12 below.

Face number

k

A

B

C

D

E

F

S6

0.3026

5.9650E-05

8.5244E-06

-1.0561E-06

1.1843E-07

-6.0274E-09

1.4509E-10

S7

0.8074

4.8939E-04

1.1340E-05

-1.6555E-06

2.2236E-07

-1.2883E-08

3.3454E-10

S12

-98.8084

-2.3824E-03

-1.8306E-06

-1.6560E-05

2.1137E-06

-1.1172E-07

3.2770E-09

S13

-34.6189

-5.6330E-03

7.8699E-04

-1.0581E-04

9.2338E-06

-4.3165E-07

8.6249E-09

Table 12

Example 5

An optical lens according to embodiment 5 of the present application is described below with reference to fig. 5. Fig. 5 is a schematic diagram showing the structure of an optical lens according to embodiment 5 of the present application.

As shown in fig. 5, the optical lens sequentially includes, from an object side to an image side along an optical axis: a first lens L1, a second lens L2, a third lens L3, a stop STO, a fourth lens L4, a fifth lens L5, a sixth lens L6, and a seventh lens L7.

The third lens element L3 has a convex object-side surface S5 and a convex image-side surface S6, and the object-side surface S5 and the image-side surface S6 of the third lens element L3 are aspheric.

The fourth lens element L4 has a convex object-side surface S8 and a convex image-side surface S9, and the fourth lens element L4 has a spherical object-side surface S8 and an image-side surface S9.

The fifth lens element L5 has a convex object-side surface S10 and a convex image-side surface S11, and the object-side surface S10 and the image-side surface S11 of the fifth lens element L5 are spherical surfaces.

The sixth lens element L6 has a concave object-side surface S11 and a concave image-side surface S12, and the object-side surface S11 and the image-side surface S12 of the sixth lens element L6 are spherical surfaces.

The seventh lens L7 is a meniscus lens with positive focal power, the object-side surface S13 is a convex surface, the image-side surface S14 is a concave surface, and the object-side surface S13 and the image-side surface S14 of the seventh lens L7 are both aspheric.

In the present embodiment, the fifth lens L5 and the sixth lens L6 are combined into a cemented lens.

Optionally, the optical lens may further include a filter L8 having an object side surface S15 and an image side surface S16 and/or a protective glass L9 having an object side surface S17 and an image side surface S18. The filter L8 may be used to correct color deviation. The cover glass L9 may be used to protect the image sensing chip located on the imaging surface. Light from the object passes sequentially through the respective surfaces S1 to S18 and is finally imaged on the imaging plane IMA.

In the optical lens of the present embodiment, the stop STO may be disposed between the third lens L3 and the fourth lens L4 to further improve the imaging quality.

Table 13 shows the basic parameter table of the optical lens of example 5, in which the units of radius of curvature, thickness/distance, and focal length are all millimeters (mm).

TABLE 13

In the present embodiment, the maximum field angle FOV of the optical lens=94.6°. Table 14 below shows the total effective focal length f of the optical lens of example 5, the total optical length TTL of the optical lens (i.e., the distance on the optical axis from the center of the object side surface S1 of the first lens L1 to the imaging surface IMA), the image height H corresponding to the maximum field angle of the optical lens, the maximum light-transmitting aperture D of the object side surface S1 of the first lens corresponding to the maximum field angle of the optical lens, the optical back focus BFL of the optical lens (i.e., the distance on the optical axis from the center of the image side surface S13 of the seventh lens element to the image plane IMA), the maximum light-transmitting half-aperture D12 of the object side surface S12 of the seventh lens element L7 corresponding to the maximum field angle of the optical lens element, the Sg value SAG12 corresponding to the maximum light-transmitting half-aperture D12, the maximum light-transmitting half-aperture D13 of the image side surface S13 of the seventh lens element L7 corresponding to the maximum field angle of the optical lens element, the Sg value SAG13 corresponding to the maximum light-transmitting half-aperture D13, and the effective focal length f56 of the cemented lens element composed of the fifth lens element L5 and the sixth lens element L6, wherein the units of TTL, f, H, D, BFL, SAG, D12, SAG13, D13, f56 are millimeters (mm).

Parameters (parameters)	TTL	f	H	D	BFL	SAG12	D12	SAG13	D13	f56
											Numerical value	30.77	5.75	9.63	11.16	8.52	1.20	4.09	0.71	3.99	-46.14

TABLE 14

In embodiment 5, the object side surface and the image side surface of the third lens element L3 and the seventh lens element L7 are aspheric, and the surface profile Z of each aspheric lens element can be defined by, but not limited to, the formula (1) in embodiment 1. The cone coefficients k and the higher order coefficients A, B, C, D, E and F that can be used for each of the aspherical mirror surfaces S5, S6, S12 and S13 in example 4 are given in table 12 below.

Face number

k

A

B

C

D

E

F

S5

0.1068

-1.7253E-04

3.6361E-06

3.4705E-07

-2.6530E-08

2.2956E-10

0

S6

-1.1257

1.8663E-04

-2.0339E-06

9.3137E-07

-4.2715E-08

3.8363E-10

0

S13

2.6202

1.0096E-03

7.4190E-06

-5.2419E-07

4.8129E-08

-1.5273E-09

0

S14

99.0000

2.1395E-03

4.7769E-05

-2.0480E-06

2.6035E-07

-8.4126E-09

0

TABLE 15

Example 6

An optical lens according to embodiment 6 of the present application is described below with reference to fig. 6. Fig. 6 is a schematic diagram showing the structure of an optical lens according to embodiment 6 of the present application.

As shown in fig. 6, the optical lens sequentially includes, from an object side to an image side along an optical axis: a first lens L1, a second lens L2, a third lens L3, a stop STO, a fourth lens L4, a fifth lens L5, a sixth lens L6, and a seventh lens L7.

Table 16 shows the basic parameter table of the optical lens of example 6, in which the units of radius of curvature, thickness/distance, and focal length are all millimeters (mm).

Table 16

In the present embodiment, the maximum field angle FOV of the optical lens=94.6°. Table 17 below shows the total effective focal length f of the optical lens of example 6, the total optical length TTL of the optical lens (i.e., the distance on the optical axis from the center of the object side surface S1 of the first lens L1 to the imaging surface IMA), the image height H corresponding to the maximum field angle of the optical lens, the maximum light passing half-diameter D of the object side surface S1 of the first lens corresponding to the maximum field angle of the optical lens, the optical back focal BFL of the optical lens (i.e., the distance on the optical axis from the center of the image side surface S13 of the seventh lens to the imaging surface IMA), the maximum light passing half-diameter D12 of the object side surface S12 of the seventh lens L7 corresponding to the maximum field angle of the optical lens, the Sg value SAG12 corresponding to the maximum light passing half-diameter D13 of the image side surface S13 of the seventh lens L7, the Sg value corresponding to the maximum light passing half-diameter D13, and the fifth lens L5 and sixth lens L, and the fifth lens L6, and the sixth lens L6, the effective focal lengths of the optical lenses of SAG, 3, f, and 3 mm, and 3 mm.

Parameters (parameters)	TTL	f	H	D	BFL	SAG12	D12	SAG13	D13	f56
											Numerical value	30.31	5.69	9.65	10.96	8.35	1.19	4.11	0.72	3.79	-37.36

TABLE 17

In embodiment 6, the object side surface and the image side surface of the third lens element L3 and the seventh lens element L7 are aspheric, and the surface profile Z of each aspheric lens element can be defined by, but not limited to, the formula (1) in embodiment 1. The cone coefficients k and the higher order coefficients A, B, C, D, E and F that can be used for each of the aspherical mirror surfaces S5, S6, S12 and S13 in example 4 are given in table 12 below.

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TABLE 18

In summary, examples 1 to 6 satisfy the relationships shown in table 19, respectively.

TABLE 19

The application also provides an electronic device, which can comprise the optical lens and the imaging element for converting an optical image formed by the optical lens into an electric signal. The electronic device may be a stand alone imaging device such as an onboard camera or may be an imaging module integrated into, for example, a driving assistance system.

The foregoing description is only of the preferred embodiments of the present application and is presented as a description of the principles of the technology being utilized. It will be appreciated by persons skilled in the art that the scope of the invention referred to in this application is not limited to the specific combinations of features described above, but it is intended to cover other embodiments in which any combination of features described above or equivalents thereof is possible without departing from the spirit of the invention. Such as the above-described features and technical features having similar functions (but not limited to) disclosed in the present application are replaced with each other.

Claims

1. An optical lens, comprising, in order from an object side to an image side along an optical axis:

the first lens with negative focal power has a convex object side surface and a concave image side surface;

the second lens with negative focal power has a concave object side surface and a concave image side surface;

a third lens having positive optical power;

the object side surface of the fourth lens is a convex surface, and the image side surface of the fourth lens is a convex surface;

the object side surface of the fifth lens is a convex surface, and the image side surface of the fifth lens is a convex surface;

a sixth lens element with negative refractive power having a concave object-side surface and a concave image-side surface; and

a seventh lens having positive optical power; wherein,

the seventh lens is a meniscus lens;

the number of lenses having optical power in the optical lens is seven;

the total optical length TTL of the optical lens, the maximum field angle FOV of the optical lens, and the image height H corresponding to the maximum field angle of the optical lens satisfy: TTL/H/FOV is less than or equal to 0.05;

the total optical length TTL of the optical lens and the total effective focal length f of the optical lens meet the following conditions: TTL/f is less than or equal to 6.0; and

the optical back focal length BFL of the optical lens and the total optical length TTL of the optical lens satisfy the following conditions: 0.2969 BFL/TTL is more than or equal to 0.2;

The optical lens satisfies the following conditions: 0.3.ltoreq.arctan (SAG 12/D12)/arctan (SAG 13/D13). Ltoreq.3.0,

wherein D12 is the maximum light-transmitting half-caliber of the object side surface of the seventh lens corresponding to the maximum field angle of the optical lens, and SAG12 is the Sg value corresponding to D12; and

d13 is the maximum light-transmitting half aperture of the image side surface of the seventh lens corresponding to the maximum field angle of the optical lens, SAG13 is the Sg value corresponding to D13.

2. The optical lens of claim 1, wherein the third lens element has a convex object-side surface and a concave image-side surface.

3. The optical lens of claim 1, wherein the third lens element has a convex object-side surface and a convex image-side surface.

4. The optical lens of claim 1, wherein the seventh lens element has a concave object-side surface and a convex image-side surface.

5. The optical lens of claim 1, wherein the seventh lens element has a convex object-side surface and a concave image-side surface.

6. The optical lens of claim 1, wherein the fifth lens and the sixth lens form a cemented lens.

7. The optical lens of claim 1, wherein at least one of the third lens, the fourth lens, and the seventh lens is an aspherical lens.

8. The optical lens of claim 1, wherein the second lens and the third lens form a cemented lens.

9. The optical lens according to any one of claims 1 to 8, wherein a maximum field angle FOV of the optical lens, a maximum light passing aperture D of an object side surface of the first lens corresponding to the maximum field angle of the optical lens, and an image height H corresponding to the maximum field angle of the optical lens satisfy:

D/H/FOV≤0.03。

10. the optical lens according to any one of claims 1 to 8, wherein an effective focal length f5 of the fifth lens and an effective focal length f6 of the sixth lens satisfy:

0.5≤|f5/f6|≤2.0。

11. the optical lens according to any one of claims 1 to 8, wherein a center thickness dn of an nth lens having a largest center thickness among the first to seventh lenses and a center thickness dm of an mth lens having a smallest center thickness among the first to seventh lenses satisfy:

4.0.ltoreq.dn/dm.ltoreq.8.0, where n and m are selected from 1, 2, 3, 4, 5, 6, 7.

12. The optical lens according to any one of claims 1 to 8, wherein a combined focal length f56 of the fifth lens and the sixth lens and a total effective focal length f of the optical lens satisfy:

|f56/f|≥2.0。

13. The optical lens according to any one of claims 1 to 8, wherein a total effective focal length f of the optical lens, a maximum field angle FOV of the optical lens, and an image height H corresponding to the maximum field angle of the optical lens satisfy:

(FOV×f)/H≤65.0。

14. the optical lens according to any one of claims 1 to 8, wherein a radius of curvature R1 of an object side surface of the first lens, a radius of curvature R2 of an image side surface of the first lens, and a center thickness d1 of the first lens on the optical axis can satisfy: 3.2597 More than or equal to R1/(R2+d1) more than or equal to 2.0.

15. An optical lens according to any one of claims 1 to 8,

0.5≤arctan(SAG12/D12)/arctan(SAG13/D13)≤2.0，

16. An optical lens, comprising, in order from an object side to an image side along an optical axis:

a third lens having positive optical power;

a seventh lens having positive optical power;

wherein,

the seventh lens is a meniscus lens;

the number of lenses having optical power in the optical lens is seven;

the optical total length TTL of the optical lens and the distance d11 between the sixth lens and the seventh lens on the optical axis satisfy: 0.0368 Not less than d11/TTL not less than 0.01;

17. The optical lens of claim 16, wherein the third lens element has a convex object-side surface and a concave image-side surface.

18. The optical lens of claim 16, wherein the third lens element has a convex object-side surface and a convex image-side surface.

19. The optical lens of claim 16, wherein the seventh lens element has a concave object-side surface and a convex image-side surface.

20. The optical lens of claim 16, wherein the seventh lens element has a convex object-side surface and a concave image-side surface.

21. The optical lens of claim 16, wherein the fifth lens and the sixth lens form a cemented lens.

22. The optical lens of claim 16, wherein at least one of the third lens, the fourth lens, and the seventh lens is an aspherical lens.

23. The optical lens of claim 16, wherein the second lens and the third lens form a cemented lens.

24. The optical lens according to any one of claims 16 to 23, wherein a maximum field angle FOV of the optical lens, a maximum light passing aperture D of an object side surface of the first lens corresponding to the maximum field angle of the optical lens, and an image height H corresponding to the maximum field angle of the optical lens satisfy:

D/H/FOV≤0.03。

25. the optical lens of any one of claims 16 to 23, wherein an effective focal length f5 of the fifth lens and an effective focal length f6 of the sixth lens satisfy:

0.5≤|f5/f6|≤2.0。

26. the optical lens according to any one of claims 16 to 23, wherein a center thickness dn of an nth lens having a largest center thickness among the first to seventh lenses and a center thickness dm of an mth lens having a smallest center thickness among the first to seventh lenses satisfy:

27. The optical lens of any one of claims 16 to 23, wherein a combined focal length f56 of the fifth lens and the sixth lens and a total effective focal length f of the optical lens satisfy:

|f56/f|≥2.0。

28. The optical lens according to any one of claims 16 to 23, wherein a total effective focal length f of the optical lens, a maximum field angle FOV of the optical lens, and an image height H corresponding to the maximum field angle of the optical lens satisfy:

(FOV×f)/H≤65.0。

29. an optical lens as claimed in any one of claims 16 to 23,

0.5≤arctan(SAG12/D12)/arctan(SAG13/D13)≤2.0，

30. The optical lens according to any one of claims 16 to 23, wherein a radius of curvature R1 of an object side surface of the first lens, a radius of curvature R2 of an image side surface of the first lens, and a center thickness d1 of the first lens on the optical axis can satisfy: 3.2597 More than or equal to R1/(R2+d1) more than or equal to 2.0.

31. An electronic device comprising the optical lens according to claim 1 or 16 and an imaging element for converting an optical image formed by the optical lens into an electric signal.