CN114384665B

CN114384665B - Optical lens and electronic device

Info

Publication number: CN114384665B
Application number: CN202011115980.1A
Authority: CN
Inventors: 朱松河; 王东方; 姚波
Original assignee: Ningbo Sunny Automotive Optech Co Ltd
Current assignee: Ningbo Sunny Automotive Optech Co Ltd
Priority date: 2020-10-19
Filing date: 2020-10-19
Publication date: 2024-05-28
Anticipated expiration: 2040-10-19
Also published as: CN114384665A

Abstract

The application discloses an optical lens and an electronic device comprising the same. The optical lens sequentially comprises, 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; a second lens having negative optical power; a third lens having positive optical power, the object side surface of which is a convex surface; a fourth lens element with optical power, the image-side surface of which is convex; 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 with negative focal power, the object side surface of which is a concave surface; a seventh lens having optical power.

Description

Optical lens and electronic device

Technical Field

The present application relates to the field of optical elements, and more particularly, to an optical lens and an electronic device.

Background

In recent years, with the high-speed development of automobile auxiliary driving systems, the application of optical lenses to automobiles is becoming more and more widespread. The requirements on pixels of on-board lenses are also increasing in the market. At the same time, more and more lens manufacturers are beginning to study how to enable the on-vehicle front-view lens to stably image in a high and low temperature environment. For safety reasons, users often have very high requirements on the imaging performance of the front-view optical lens applied to the automobile. The front-view optical lens applied to the automobile needs to have miniaturized and higher pixels, and the resolving power of the automobile-mounted lens needs to be improved on the basis of the original automobile-mounted optical lens. In particular, such onboard front-view lenses are also required to have high imaging stability to avoid the risk of the front-view lens causing degradation of the imaging performance of the lens under large temperature differences.

Currently, in order to improve the resolution of the existing vehicle-mounted optical lens, most lens manufacturers generally increase the number of lenses to improve the resolution of the lens, but this will affect the miniaturization of the lens to some extent. Therefore, how to make the on-vehicle optical lens have miniaturization, high resolution and better temperature performance is one of the challenges to be solved by many lens designers at present.

Disclosure of Invention

In one aspect, an optical lens is provided. The optical lens sequentially comprises, 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; a second lens having negative optical power; a third lens having positive optical power, the object side surface of which is a convex surface; a fourth lens element with optical power, the image-side surface of which is convex; 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 with negative focal power, the object side surface of which is a concave surface; a seventh lens having optical power.

In one embodiment, the object-side surface of the second lens is concave and the image-side surface is concave.

In one embodiment, the object-side surface of the second lens element is convex and the image-side surface is concave.

In one embodiment, the object-side surface of the second lens element is concave and the image-side surface is convex.

In one embodiment, the image side of the third lens is convex.

In one embodiment, the image side of the third lens is concave.

In one embodiment, the fourth lens has negative optical power, and the object side surface of the fourth lens is concave.

In one embodiment, the fourth lens has positive optical power and the object-side surface thereof is concave.

In one embodiment, the fourth lens has positive optical power, and the object side surface of the fourth lens is convex.

In one embodiment, the image side of the sixth lens is concave.

In one embodiment, the image side of the sixth lens is convex.

In one embodiment, the seventh lens element has positive refractive power, wherein the object-side surface thereof is convex and the image-side surface thereof is convex.

In one embodiment, the seventh lens element has positive optical power, and the object-side surface thereof is convex and the image-side surface thereof is concave.

In one embodiment, the seventh lens element has negative optical power, wherein the object-side surface thereof is convex and the image-side surface thereof is concave.

In one embodiment, the seventh lens element has positive optical power, and the object-side surface thereof is concave and the image-side surface thereof is convex.

In one embodiment, the seventh lens element has negative refractive power, wherein the object-side surface thereof is concave and the image-side surface thereof is convex.

In one embodiment, the third lens and the fourth lens are cemented to form a first cemented lens; and the fifth lens and the sixth lens are cemented to form a second cemented lens.

In one embodiment, the second lens and the seventh lens each have an aspherical mirror surface.

In one embodiment, the distance TTL between the center of the object side surface of the first lens and the imaging surface of the optical lens on the optical axis and the total effective focal length F of the optical lens may satisfy: TTL/F is less than or equal to 5.5.

In one embodiment, the distance BFL between the center of the image side surface of the seventh lens element and the imaging surface of the optical lens element on the optical axis and the distance TTL between the center of the object side surface of the first lens element and the imaging surface of the optical lens element on the optical axis may satisfy: BFL/TTL is more than or equal to 0.1.

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: the D/H/FOV is less than or equal to 0.1.

In one embodiment, the effective focal length F1 of the first lens and the total effective focal length F of the optical lens may satisfy: the F1/F is more than or equal to 1.5.

In one embodiment, the total effective focal length F of the optical lens and the radius of curvature R1 of the object side surface of the first lens may satisfy: the F/R1 is less than or equal to 1.

In one embodiment, the radius of curvature R3 of the object-side surface of the second lens and the radius of curvature R4 of the image-side surface of the second lens may satisfy: (R3-R4)/(R3+R4) I is more than or equal to 0.3.

In one embodiment, the combined focal length F34 of the third lens and the fourth lens and the total effective focal length F of the optical lens may satisfy: and F34/F is more than or equal to 1.

In one embodiment, a distance TTL between a center of an object side surface of the first lens and an imaging surface of the optical lens on an optical axis, an image height H corresponding to a maximum field angle of the optical lens, and a maximum field angle FOV of the optical lens may satisfy: TTL/H/FOV is less than or equal to 0.1.

In one embodiment, the distance T12 between the center of the image side of the first lens element and the center of the object side of the second lens element on the optical axis and the distance TTL between the center of the object side of the first lens element and the imaging surface of the optical lens element on the optical axis may be as follows: T12/TTL is more than or equal to 0.1.

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: dn/dm is less than or equal to 2.5, wherein n and m are selected from 1,2,3,4,5, 6 and 7.

In one embodiment, the distance T45 between the center of the image side of the fourth lens element and the center of the object side of the fifth lens element on the optical axis and the distance TTL between the center of the object side of the first lens element and the imaging surface of the optical lens element on the optical axis may be as follows: T45/TTL is more than or equal to 0.008 and less than or equal to 0.5.

In one embodiment, the distance T67 between the center of the image side of the sixth lens element and the center of the object side of the seventh lens element on the optical axis and the distance TTL between the center of the object side of the first lens element and the imaging surface of the optical lens element on the optical axis may be as follows: T67/TTL is more than or equal to 0.05 and less than or equal to 0.2.

In one embodiment, the radius of curvature R1 of the object-side surface of the first lens and the radius of curvature R2 of the image-side surface of the first lens may satisfy: R1/R2 is more than or equal to 4 and less than or equal to 25.

In another aspect, the present application provides an optical lens. The optical lens sequentially comprises, from an object side to an image side along an optical axis: a first lens having negative optical power; a second lens having negative optical power; a third lens having positive optical power; a fourth lens having optical power; a fifth lens having positive optical power; a sixth lens having negative optical power; a seventh lens having optical power; the distance T67 between the center of the image side of the sixth lens element and the center of the object side of the seventh lens element on the optical axis and the distance TTL between the center of the object side of the first lens element and the imaging surface of the optical lens element on the optical axis can be as follows: T67/TTL is more than or equal to 0.05 and less than or equal to 0.2.

In one embodiment, the first lens element has a convex object-side surface and a concave image-side surface.

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

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

In one embodiment, the fourth lens element has negative refractive power, wherein the object-side surface thereof is concave and the image-side surface thereof is convex.

In one embodiment, the fourth lens element has positive refractive power, wherein the object-side surface thereof is concave and the image-side surface thereof is convex.

In one embodiment, the fourth lens element has positive refractive power, wherein the object-side surface thereof is convex and the image-side surface thereof is convex.

In one embodiment, the object-side surface of the fifth lens element is convex, and the image-side surface is convex.

In one embodiment, the object-side surface of the sixth lens element is concave and the image-side surface is concave.

In one embodiment, the object-side surface of the sixth lens element is concave and the image-side surface is convex.

In another aspect, the application provides an electronic device. The electronic device comprises the optical lens provided by the application and an imaging element for converting an optical image formed by the optical lens into an electric signal.

The application adopts seven lenses, and the optical lens has at least one beneficial effects of high resolution, miniaturization, low cost, good temperature performance and the like by optimally setting the shape, focal power and the like of each lens.

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 is a schematic diagram showing the structure of an optical lens according to embodiment 1 of the present application;

fig. 2 is a schematic diagram showing the structure of an optical lens according to embodiment 2 of the present application;

Fig. 3 is a schematic diagram showing the structure of an optical lens according to embodiment 3 of the present application;

fig. 4 is a schematic diagram showing the structure of an optical lens according to embodiment 4 of the present application;

fig. 5 is a schematic diagram showing the structure of an optical lens according to embodiment 5 of the present application;

fig. 6 is a schematic diagram showing the structure of an optical lens according to embodiment 6 of the present application;

fig. 7 is a schematic diagram showing the structure of an optical lens according to embodiment 7 of the present application;

fig. 8 is a schematic diagram showing the structure of an optical lens according to embodiment 8 of the present application;

fig. 9 is a schematic diagram showing the structure of an optical lens according to embodiment 9 of the present application;

fig. 10 is a schematic diagram showing the structure of an optical lens according to embodiment 10 of the present application;

Fig. 11 is a schematic diagram showing the structure of an optical lens according to embodiment 11 of the present application; and

Fig. 12 is a schematic diagram showing the structure of an optical lens according to embodiment 12 of the present application.

Detailed Description

For a better understanding of the application, various aspects of the application will be described in more detail with reference to the accompanying drawings. It should be understood that the detailed description is merely illustrative of exemplary embodiments of the application and is 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 subject is referred to as the object side of the lens, and the surface of each lens closest to the imaging side 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 application, use of "may" means "one or more embodiments of the 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, without conflict, the embodiments of the present application and features of the embodiments may be combined with each other. The application will be described in detail below with reference to the drawings in connection with embodiments.

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

In an exemplary embodiment, the optical lens includes, for example, 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 order from the object side to the image side along the optical axis.

In an exemplary embodiment, the optical lens 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).

In an exemplary embodiment, the first lens may have negative optical power. The first lens may have a convex-concave shape. Such power and surface type arrangement of the first lens is advantageous in making light smoothly enter the rear optical system, in improving resolution, and in collecting light of a large field of view as much as possible into the rear optical system to increase the amount of light passing. In practical application, the use environment of the vehicle-mounted lens after outdoor installation is considered, and the vehicle-mounted lens can be in severe weather environments such as rain and snow, so that the water drops can slide off easily, and the influence on imaging is reduced. The first lens may preferably be an aspherical lens to further improve the resolution quality.

In an exemplary embodiment, the second lens may have negative optical power. The second lens may have a concave-concave type, a convex-concave type, or a concave-convex type. The focal power and the surface shape of the second lens are beneficial to converging light rays, reducing the caliber and the length of the lens barrel of the optical lens and realizing miniaturization. The second lens may preferably be an aspherical lens.

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

In an exemplary embodiment, the fourth lens may have positive or negative optical power. The fourth lens may have a concave-convex type or a convex-convex type.

In an exemplary embodiment, the fifth lens may have positive optical power. The fifth lens may have a convex shape.

In an exemplary embodiment, the sixth lens may have negative optical power. The sixth lens may have a concave-concave surface type or a concave-convex surface type.

In an exemplary embodiment, the seventh lens may have positive or negative optical power. The seventh lens may have a convex-convex type, a convex-concave type, or a concave-convex type. The focal power and the surface shape of the seventh lens are favorable for smoothing the trend of the front light and improving the resolution quality. The seventh lens may preferably be an aspherical lens.

In an exemplary embodiment, both the second lens and the seventh lens may have aspherical mirror surfaces to improve the resolution quality.

In an exemplary embodiment, the optical lens according to the present application may satisfy: TTL/F is less than or equal to 5.5, wherein TTL is the distance between the center of the object side surface of the first lens and the imaging surface of the optical lens on the optical axis, and F is the total effective focal length of the optical lens. More specifically, TTL and F can further satisfy: TTL/F is not less than 4.5 and not more than 5.5. The TTL/F is less than or equal to 5.5, which is beneficial to realizing miniaturization.

In an exemplary embodiment, the optical lens according to the present application may satisfy: BFL/TTL is equal to or greater than 0.1, wherein BFL is the distance between the center of the image side surface of the seventh lens and the imaging surface of the optical lens on the optical axis, and TTL is the distance between the center of the object side surface of the first lens and the imaging surface of the optical lens on the optical axis. More specifically, BFL and TTL may further satisfy: BFL/TTL is more than or equal to 0.1 and less than or equal to 0.25. The BFL/TTL is more than or equal to 0.1, which is beneficial to making the back focus BFL longer and beneficial to the assembly of the module on the basis of realizing miniaturization of the optical lens. The total length TTL of the optical lens is short, so that the structure is compact, the sensitivity of the lens to MTF is reduced, the production yield is improved, and the production cost is reduced.

In an exemplary embodiment, the optical lens according to the present application may satisfy: the D/H/FOV is less than or equal to 0.1, wherein the FOV is the maximum field angle of the optical lens, D is the maximum aperture of the object side surface of the first lens corresponding to the maximum field angle of the optical lens, and H is the image height corresponding to the maximum field angle of the optical lens. More specifically, D, H and FOV may further satisfy: D/H/FOV is more than or equal to 0.01 and less than or equal to 0.1. Satisfies D/H/FOV less than or equal to 0.1, is favorable for leading the caliber of the front end to be smaller and is favorable for realizing miniaturization.

In an exemplary embodiment, the optical lens according to the present application may satisfy: and the ratio of F1/F is more than or equal to 1.5, wherein F1 is the effective focal length of the first lens, and F is the total effective focal length of the optical lens. More specifically, F1 and F further satisfy: F1/F1 is more than or equal to 1.5 and less than or equal to 1.9. Satisfies the condition that the |F1/F| is more than or equal to 1.5, and is favorable for more light to stably enter the optical lens so as to increase the illumination of the optical lens.

In an exemplary embodiment, the optical lens according to the present application may satisfy: F/R1 is less than or equal to 1, wherein F is the total effective focal length of the optical lens, and R1 is the curvature radius of the object side surface of the first lens. More specifically, F and R1 may further satisfy: the ratio of F/R1 is more than or equal to 0.05 and less than or equal to 0.3. Satisfies |F/R1| is less than or equal to 1, can effectively avoid the problem that the curvature of the object side surface of the first lens is too small, can further effectively avoid aberration generated when light is incident, and is also beneficial to the manufacture of the first lens.

In an exemplary embodiment, the optical lens according to the present application may satisfy: and (R3-R4)/(R3+R4) is equal to or greater than 0.3, wherein R3 is the curvature radius of the object side surface of the second lens, and R4 is the curvature radius of the image side surface of the second lens. More specifically, R3 and R4 may further satisfy: (R3-R4)/(R3+R4) is less than or equal to 0.3 and less than or equal to 1.5. The optical lens can correct the aberration of the optical lens and is beneficial to ensuring the smooth transition of the light rays passing through the second lens, thereby reducing the tolerance sensitivity of the optical lens.

In an exemplary embodiment, the optical lens according to the present application may satisfy: F34/F1, wherein F34 is the combined focal length of the third lens and the fourth lens, and F is the total effective focal length of the optical lens. More specifically, F34 and F further satisfy: F34/F is less than or equal to 1.2 and less than or equal to 1.6. Satisfies |F34/F|not less than 1, and contributes to realizing thermal compensation so as to improve the temperature performance of a lens barrel provided with the optical lens.

In an exemplary embodiment, the optical lens according to the present application may satisfy: TTL/H/FOV is less than or equal to 0.1, wherein TTL is the distance between the center of the object side surface of the first lens and the imaging surface of the optical lens on the optical axis, H is the image height corresponding to the maximum field angle of the optical lens, and FOV is the maximum field angle of the optical lens. More specifically, TTL, H, and FOV can further satisfy: TTL/H/FOV is not less than 0.01 and not more than 0.05. The TTL/H/FOV is less than or equal to 0.1, so that the total length of the lens can be effectively limited under the condition that the optical lens has the same imaging surface and the same image height, and the miniaturization of the lens is realized.

In an exemplary embodiment, the optical lens according to the present application may satisfy: T12/TTL is equal to or greater than 0.1, wherein T12 is the interval distance between the center of the image side surface of the first lens and the center of the object side surface of the second lens on the optical axis, and TTL is the distance between the center of the object side surface of the first lens and the imaging surface of the optical lens on the optical axis. More specifically, T12 and TTL further satisfy: T12/TTL is more than or equal to 0.1 and less than or equal to 0.2. The T12/TTL is more than or equal to 0.1, and the CRA of the optical lens can be effectively reduced.

In an exemplary embodiment, the optical lens according to the present application may satisfy: and dn/dm is less than or equal to 2.5, wherein, the central thickness of the nth lens with the largest central thickness in the dn first lens to the seventh lens is equal to the central thickness of the mth lens with the smallest central thickness in the first lens to the seventh lens, and n and m are selected from 1,2,3, 4, 5, 6 and 7. More specifically, dn and dm may further satisfy: and dn/dm is more than or equal to 1.6 and less than or equal to 2.5. Satisfying dn/dm less than or equal to 2.5, being beneficial to making the thickness of each lens of the optical lens uniform, stabilizing the effect of each lens, being beneficial to small light change at high and low temperature and having good temperature performance.

In an exemplary embodiment, the optical lens according to the present application may satisfy: T45/TTL is equal to or less than 0.008 and equal to or less than 0.5, wherein T45 is the interval distance between the center of the image side surface of the fourth lens and the center of the object side surface of the fifth lens on the optical axis, and TTL is the distance between the center of the object side surface of the first lens and the imaging surface of the optical lens on the optical axis. More specifically, T45 and TTL further satisfy: T45/TTL is more than or equal to 0.01 and less than or equal to 0.05. The T45/TTL which is more than or equal to 0.008 and less than or equal to 0.5 is satisfied, and the miniaturization of the lens is facilitated.

In an exemplary embodiment, the optical lens according to the present application may satisfy: T67/TTL is 0.05-0.2, wherein T67 is the interval distance between the center of the image side surface of the sixth lens and the center of the object side surface of the seventh lens on the optical axis, and TTL is the distance between the center of the object side surface of the first lens and the imaging surface of the optical lens on the optical axis. More specifically, T67 and TTL may further satisfy: T67/TTL is more than or equal to 0.05 and less than or equal to 0.15. The T67/TTL which is more than or equal to 0.05 and less than or equal to 0.2 is satisfied, and the miniaturization of the lens is facilitated.

In an exemplary embodiment, the optical lens according to the present application may satisfy: 4.ltoreq.R1/R2.ltoreq.25, where R1 is the radius of curvature of the object-side surface of the first lens and R2 is the radius of curvature of the image-side surface of the first lens. More specifically, R1 and R2 may further satisfy: R1/R2 is more than or equal to 4 and less than or equal to 21. Satisfies R1/R2 not less than 4 and not more than 25, is favorable for causing the peripheral light and the central light of the optical lens to have optical path difference, is favorable for diverging the central light to enter the rear optical system, is favorable for reducing the caliber of the front end of the lens, reduces the volume of the lens, is favorable for realizing miniaturization and is favorable for reducing the cost.

In an exemplary embodiment, a stop for limiting the light beam may be provided between the fourth lens and the fifth lens to further improve the imaging quality of the optical lens. The aperture is arranged between the fourth lens and the fifth lens, so that aperture of the aperture is increased, effective beam converging of light entering the optical lens is facilitated, aperture of the lens is reduced, and total length of the optical lens is shortened. In the embodiment of the present application, the stop may be disposed near the image side of the fourth lens or near the object side of the fifth lens. It should be noted, however, that the locations of the diaphragms disclosed herein are merely examples and not limiting; in alternative embodiments, the diaphragm may be arranged in other positions as desired.

In an exemplary embodiment, the optical lens of the present application may further include a filter and/or a cover glass disposed between the seventh lens and the imaging surface as needed to filter light rays having different wavelengths and prevent an image Fang Yuanjian (e.g., a chip) of the optical lens from being damaged.

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 realizing high resolution and 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 cemented to form a cemented lens. The third lens element with a convex image-side surface is glued to the fourth lens element with a concave object-side surface or the third lens element with a concave image-side surface is glued to the fourth lens element with a convex object-side surface, which is advantageous for smooth transition of light passing through the third lens element to the rear optical system and for reduction of the total length of the optical lens. . Of course, the third lens and the fourth lens may not be cemented, which is advantageous for improving the resolution.

In an exemplary embodiment, the fifth lens and the sixth lens may be cemented to form a cemented lens. The fifth lens and the sixth lens have opposite optical powers. For example, the fifth lens has positive optical power, and the sixth lens has negative optical power. The fifth lens element with convex object-side and image-side surfaces is glued to the sixth lens element with concave object-side and concave image-side surfaces, which facilitates smooth transition of light passing through the fifth lens element to the rear optical system and reduces total length of the optical lens assembly. . Of course, the fifth lens and the sixth lens may not be cemented, which is advantageous for improving the resolution.

The adoption of the gluing mode between the lenses has at least one of the following advantages: reducing self chromatic aberration, reducing tolerance sensitivity, and balancing the overall chromatic aberration of the system through residual partial chromatic aberration; the spacing distance between the two lenses is reduced, so that the total length of the system is reduced; the assembly parts between the lenses are reduced, so that the working procedures are reduced, and the cost is lowered; the tolerance sensitivity problems of the lens unit, such as inclination/core deflection and the like, generated in the assembly process are reduced, and the production yield is improved; the light quantity loss caused by reflection among lenses is reduced, and the illumination is improved; further reduces field curvature and effectively corrects off-axis aberrations of the optical lens. The gluing design shares the whole chromatic aberration correction of the system, effectively corrects aberration, improves the resolution, ensures that the whole optical system is compact, and meets the miniaturization requirement.

In an exemplary embodiment, the first, third, fourth, fifth, and sixth lenses may be spherical lenses. The second lens and the seventh lens may be aspherical lenses. In particular, in order to improve the resolution quality of the optical system, the first lens, the second lens, the third lens, the fourth lens, the fifth lens, the sixth lens, and the seventh lens may each be an aspherical lens. 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. The arrangement of the aspheric lens is helpful for correcting system aberration and improving resolution.

The optical lens according to the above embodiment of the present application achieves at least one advantageous effect of high resolution (up to eight megapixels or more), low cost, miniaturization, and good imaging quality of the optical system by reasonable arrangement of the shape and optical power of each lens in the case of using only 7 lenses. Meanwhile, the optical system also meets the requirements of small volume, small front end caliber, low sensitivity and high production yield of the lens. The optical lens has smaller CRA, can effectively avoid stray light generated by striking the lens barrel when the rear end of the light is emergent, and can well match with the vehicle-mounted chip so as to avoid color cast and dark angle. Meanwhile, the optical lens has better temperature performance, is favorable for small imaging effect change under high and low temperature environments, has stable image quality, and is favorable for being used in most environments.

According to the optical lens provided by the embodiment of the application, the integral chromatic aberration correction of the system is shared by arranging the cemented lens, so that the aberration of the system is corrected, the resolution quality of the system is improved, the problem of matching sensitivity is reduced, the integral compactness of the optical system is realized, and the miniaturization requirement is met.

In an exemplary embodiment, the first to seventh lenses in the optical lens may be each made of glass. The optical lens made of glass can inhibit the shift of the back focus of the optical lens along with the change of temperature, so as to improve the stability of the system. Meanwhile, the adoption of the glass material can avoid the influence on the normal use of the lens due to the imaging blurring of the lens caused by the high and low temperature change in the use environment. In particular, when the importance is attached to annotating image quality and reliability, the first lens to the seventh lens may each be a glass aspherical lens. Of course, in applications with low requirements for temperature stability, the first lens to the seventh lens in the optical lens may be made of plastic. The optical lens is made of plastic, so that the manufacturing cost can be effectively reduced.

However, those skilled in the art will appreciate that the various results and advantages described in this specification can be obtained by changing the number of lenses making up a lens barrel without departing from the technical solution claimed in the present application. For example, although seven lenses are described as an example in the embodiment, the optical lens is not limited to include 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 shows a schematic configuration of an optical lens according to embodiment 1 of the present application.

As shown in fig. 1, the optical lens includes, in order 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 fifth lens L5, a sixth lens L6, and a seventh lens L7.

The first lens L1 is a convex-concave lens having negative optical power, the object-side surface S1 thereof is a convex surface, and the image-side surface S2 thereof is a concave surface. The second lens element L2 has a concave object-side surface S3 and a concave image-side surface S4. The third lens element L3 has a convex object-side surface S5 and a convex image-side surface S6. The fourth lens element L4 has a concave object-side surface S6 and a convex image-side surface S7. The fifth lens element L5 has a convex object-side surface S9 and a convex image-side surface S10, respectively, and has positive optical power. The sixth lens element L6 has a concave object-side surface S10 and a concave image-side surface S11, and has a negative refractive power. The seventh lens L7 is a biconvex lens having positive optical power, and has a convex object-side surface S12 and a convex image-side surface S13. The third lens L3 and the fourth lens L4 may be cemented to constitute a first cemented lens. The fifth lens L5 and the sixth lens L6 may be cemented to constitute a second cemented lens.

The optical lens may further include a stop STO, which may be disposed between the fourth lens L4 and the fifth lens L5 to improve imaging quality. For example, the stop STO may be disposed between the fourth lens L4 and the fifth lens L5 at a position near the image side surface S7 of the fourth lens L4.

Optionally, the optical lens may further include an optical filter L8 having an object side surface S14 and an image side surface S15. The filter L8 can be used to correct color deviation. The optical lens may further include a cover glass L9 having an object side surface S16 and an image side surface S17. The cover glass L9 can be used to protect the image sensing chip IMA located at the imaging surface S18. Light from the object sequentially passes through the respective surfaces S1 to S17 and is finally imaged on the imaging surface S18.

Table 1 shows the radius of curvature R, the thickness d/distance T of each lens of the optical lens of embodiment 1 (it is understood that the thickness d/distance T of the row in which S1 is located is the center thickness d1 of the first lens L1, and the thickness d/distance T of the row in which S2 is located is the spacing distance T12 between the first lens L1 and the second lens L2, and so on), the refractive index Nd, and the dispersion coefficient Vd.

TABLE 1

In embodiment 1, the second lens L2 and the seventh lens L7 may be aspherical lenses, and the first lens L1, the third lens L3, the fourth lens L4, the fifth lens L5, and the sixth lens L6 may be spherical lenses. The profile x of each aspherical lens can be defined using, but not limited to, the following aspherical formula:

Wherein x 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 a conic coefficient; ai is the correction coefficient of the aspherical i-th order. The cone coefficients k and the higher order coefficients A4, A6, A8 and a10 that can be used for the respective aspherical mirror faces S3, S4, S12 and S13 in example 1 are given in table 2 below.

Face number	k	A4	A6	A8	A10
						S3	-11.4115	-1.8731E-03	1.5083E-04	-7.9225E-06	2.6316E-07
S4	82.4500	5.4194E-04	8.5726E-05	-4.4159E-06	2.3552E-07
						S12	34.0000	-6.1634E-03	1.3244E-06	-4.3194E-05	2.8533E-06
S13	-99.0000	-5.6007E-03	2.0284E-04	-2.2965E-05	1.1246E-06

TABLE 2

Example 2

An optical lens according to embodiment 2 of the present application is described below with reference to fig. 2. In this embodiment and the following embodiments, descriptions of portions similar to embodiment 1 will be omitted for brevity. Fig. 2 shows a schematic configuration of an optical lens according to embodiment 2 of the present application.

As shown in fig. 2, the optical lens includes, in order 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 fifth lens L5, a sixth lens L6, and a seventh lens L7.

Table 3 shows the radius of curvature R, thickness d/distance T, refractive index Nd, and dispersion coefficient Vd of each lens of the optical lens of example 2. Table 4 shows cone coefficients and higher order coefficients that can be used for each aspherical mirror surface in example 2, wherein each aspherical surface profile can be defined by the formula (1) given in example 1 above.

TABLE 3 Table 3

Face number	k	A4	A6	A8	A10
						S3	-10.5500	-1.8432E-03	1.5023E-04	-7.9513E-06	2.6472E-07
S4	99.0000	6.3885E-04	7.9775E-05	-4.3491E-06	2.3543E-07
						S12	1.2400	-6.1644E-03	-3.6694E-07	-4.2939E-05	2.8201E-06
S13	-99.0000	-5.5863E-03	1.9956E-04	-2.2666E-05	1.1089E-06

TABLE 4 Table 4

Example 3

An optical lens according to embodiment 3 of the present application is described below with reference to fig. 3. Fig. 3 shows a schematic structural view of an optical lens according to embodiment 3 of the present application.

As shown in fig. 3, the optical lens includes, in order 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 fifth lens L5, a sixth lens L6, and a seventh lens L7.

The first lens L1 is a convex-concave lens having negative optical power, the object-side surface S1 thereof is a convex surface, and the image-side surface S2 thereof is a concave surface. The second lens L2 is a convex-concave lens with negative optical power, wherein an object side surface S3 is a convex surface, and an image side surface S4 is a concave surface. The third lens element L3 has a convex object-side surface S5 and a convex image-side surface S6. The fourth lens element L4 has a concave object-side surface S6 and a convex image-side surface S7. The fifth lens element L5 has a convex object-side surface S9 and a convex image-side surface S10, respectively, and has positive optical power. The sixth lens element L6 has a concave object-side surface S10 and a concave image-side surface S11, and has a negative refractive power. The seventh lens L7 is a biconvex lens having positive optical power, and has a convex object-side surface S12 and a convex image-side surface S13. The third lens L3 and the fourth lens L4 may be cemented to constitute a first cemented lens. The fifth lens L5 and the sixth lens L6 may be cemented to constitute a second cemented lens.

Table 5 shows the radius of curvature R, thickness d/distance T, refractive index Nd, and dispersion coefficient Vd of each lens of the optical lens of example 3. Table 6 shows cone coefficients and higher order coefficients that can be used for each aspherical mirror surface in example 3, where each aspherical surface profile can be defined by the formula (1) given in example 1 above.

TABLE 5

Face number	k	A4	A6	A8	A10
						S3	19.3774	-4.0477E-03	1.6571E-04	-4.3244E-07	-4.5538E-08
S4	-5.2966	-5.9166E-04	8.0329E-05	7.6181E-06	-3.8473E-07
						S12	99.0000	-6.6365E-03	5.3459E-05	-5.8283E-05	4.5424E-06
S13	-23.5400	-6.4722E-03	3.0277E-04	-3.2636E-05	1.6907E-06

TABLE 6

Example 4

An optical lens according to embodiment 4 of the present application is described below with reference to fig. 4. Fig. 4 shows a schematic structural view of an optical lens according to embodiment 4 of the present application.

As shown in fig. 4, the optical lens includes, in order 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 fifth lens L5, a sixth lens L6, and a seventh lens L7.

Table 7 shows the radius of curvature R, thickness d/distance T, refractive index Nd, and dispersion coefficient Vd of each lens of the optical lens of example 4. Table 8 shows cone coefficients and higher order coefficients that can be used for each aspherical mirror surface in example 4, where each aspherical surface profile can be defined by the formula (1) given in example 1 above.

TABLE 7

Face number	k	A4	A6	A8	A10
						S3	77.4457	-3.6581E-03	1.7615E-04	-3.8005E-06	9.0528E-08
S4	-6.8661	-3.4840E-04	8.8789E-05	2.7004E-06	-1.1569E-07
						S12	32.6381	-6.3644E-03	6.9166E-05	-5.4412E-05	4.0035E-06
S13	-19.4615	-6.1963E-03	2.9815E-04	-3.0461E-05	1.4864E-06

TABLE 8

Example 5

An optical lens according to embodiment 5 of the present application is described below with reference to fig. 5. Fig. 5 shows a schematic structural view of an optical lens according to embodiment 5 of the present application.

As shown in fig. 5, the optical lens includes, in order 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 fifth lens L5, a sixth lens L6, and a seventh lens L7.

The first lens L1 is a convex-concave lens having negative optical power, the object-side surface S1 thereof is a convex surface, and the image-side surface S2 thereof is a concave surface. The second lens element L2 has a concave object-side surface S3 and a convex image-side surface S4. The third lens element L3 has a convex-concave lens element with positive refractive power, and has a convex object-side surface S5 and a concave image-side surface S6. The fourth lens element L4 has a convex object-side surface S6 and a convex image-side surface S7. The fifth lens element L5 has a convex object-side surface S9 and a convex image-side surface S10, respectively, and has positive optical power. The sixth lens element L6 has a concave object-side surface S10 and a concave image-side surface S11, and has a negative refractive power. The seventh lens L7 is a biconvex lens having positive optical power, and has a convex object-side surface S12 and a convex image-side surface S13. The third lens L3 and the fourth lens L4 may be cemented to constitute a first cemented lens. The fifth lens L5 and the sixth lens L6 may be cemented to constitute a second cemented lens.

Table 9 shows the radius of curvature R, thickness d/distance T, refractive index Nd, and dispersion coefficient Vd of each lens of the optical lens of example 5. Table 10 shows cone coefficients and higher order coefficients that can be used for each aspherical mirror surface in example 5, where each aspherical surface profile can be defined by the formula (1) given in example 1 above.

TABLE 9

Table 10

Example 6

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

As shown in fig. 6, the optical lens includes, in order 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 fifth lens L5, a sixth lens L6, and a seventh lens L7.

Table 11 shows the radius of curvature R, thickness d/distance T, refractive index Nd, and dispersion coefficient Vd of each lens of the optical lens of example 6. Table 12 shows cone coefficients and higher order term coefficients that can be used for each aspherical mirror surface in example 6, where each aspherical surface profile can be defined by the formula (1) given in example 1 above.

TABLE 11

Face number	k	A4	A6	A8	A10
						S3	-5.7645	-1.0797E-03	1.2777E-04	-7.4604E-06	2.3786E-07
S4	-62.3394	1.4945E-03	3.4442E-05	-2.5674E-06	1.5723E-07
						S12	15.0000	-5.4932E-03	-7.4981E-05	-2.8667E-05	1.0644E-06
S13	-34.0000	-5.1879E-03	1.4565E-04	-1.9442E-05	7.9829E-07

Table 12

Example 7

An optical lens according to embodiment 7 of the present application is described below with reference to fig. 7. Fig. 7 shows a schematic structural diagram of an optical lens according to embodiment 7 of the present application.

As shown in fig. 7, the optical lens includes, in order 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 fifth lens L5, a sixth lens L6, and a seventh lens L7.

The first lens L1 is a convex-concave lens having negative optical power, the object-side surface S1 thereof is a convex surface, and the image-side surface S2 thereof is a concave surface. The second lens element L2 has a concave object-side surface S3 and a convex image-side surface S4. The third lens element L3 has a convex-concave lens element with positive refractive power, and has a convex object-side surface S5 and a concave image-side surface S6. The fourth lens element L4 has a convex object-side surface S6 and a convex image-side surface S7. The fifth lens element L5 has a convex object-side surface S9 and a convex image-side surface S10, respectively, and has positive optical power. The sixth lens element L6 has a concave object-side surface S10 and a convex image-side surface S11, and has negative refractive power. The seventh lens L7 is a convex-concave lens having positive power, the object-side surface S12 thereof is a convex surface, and the image-side surface S13 thereof is a concave surface. The third lens L3 and the fourth lens L4 may be cemented to constitute a first cemented lens. The fifth lens L5 and the sixth lens L6 may be cemented to constitute a second cemented lens.

The optical lens may further include a stop STO, which may be disposed between the fourth lens L4 and the fifth lens L5 to improve imaging quality. For example, the stop STO may be disposed between the fourth lens L4 and the fifth lens L5 at a position near the object side surface S9 of the fifth lens L5.

Table 13 shows the radius of curvature R, thickness d/distance T, refractive index Nd, and dispersion coefficient Vd of each lens of the optical lens of example 7. Table 14 shows cone coefficients and higher order term coefficients that can be used for each aspherical mirror surface in example 7, where each aspherical surface profile can be defined by the formula (1) given in example 1 above.

TABLE 13

Face number	k	A4	A6	A8	A10
						S3	-2.4443	-5.1323E-04	1.0215E-04	-6.1431E-06	2.0110E-07
S4	-7.8337	1.3718E-03	7.3479E-05	-3.4017E-06	1.8482E-07
						S12	14.0000	-5.0533E-03	-3.6743E-05	-1.7221E-05	8.4851E-07
S13	-15.4548	-3.9259E-03	1.7249E-06	-1.0816E-06	1.3240E-07

TABLE 14

Example 8

An optical lens according to embodiment 8 of the present application is described below with reference to fig. 8. Fig. 8 shows a schematic structural view of an optical lens according to embodiment 8 of the present application.

As shown in fig. 8, the optical lens includes, in order 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 fifth lens L5, a sixth lens L6, and a seventh lens L7.

Table 15 shows the radius of curvature R, thickness d/distance T, refractive index Nd, and dispersion coefficient Vd of each lens of the optical lens of example 8. Table 16 shows cone coefficients and higher order coefficients that can be used for each aspherical mirror in example 8, where each aspherical mirror type can be defined by the formula (1) given in example 1 above.

TABLE 15

Face number	k	A4	A6	A8	A10
						S3	-2.3617	-1.9493E-04	9.5591E-05	-6.3933E-06	2.2309E-07
S4	-8.0270	1.4639E-03	7.4334E-05	-3.9379E-06	1.8930E-07
						S12	16.4000	-4.7806E-03	-3.4825E-06	-1.5972E-05	1.0285E-06
S13	83.4000	-3.7948E-03	2.8770E-05	-1.9404E-06	1.7273E-07

Table 16

Example 9

An optical lens according to embodiment 9 of the present application is described below with reference to fig. 9. Fig. 9 shows a schematic structural view of an optical lens according to embodiment 9 of the present application.

As shown in fig. 9, the optical lens includes, in order 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 fifth lens L5, a sixth lens L6, and a seventh lens L7.

The first lens L1 is a convex-concave lens having negative optical power, the object-side surface S1 thereof is a convex surface, and the image-side surface S2 thereof is a concave surface. The second lens element L2 has a concave object-side surface S3 and a convex image-side surface S4. The third lens element L3 has a convex-concave lens element with positive refractive power, and has a convex object-side surface S5 and a concave image-side surface S6. The fourth lens element L4 has a convex object-side surface S6 and a convex image-side surface S7. The fifth lens element L5 has a convex object-side surface S9 and a convex image-side surface S10, respectively, and has positive optical power. The sixth lens element L6 has a concave object-side surface S10 and a convex image-side surface S11, and has negative refractive power. The seventh lens L7 is a convex-concave lens having negative optical power, the object-side surface S12 thereof is a convex surface, and the image-side surface S13 thereof is a concave surface. The third lens L3 and the fourth lens L4 may be cemented to constitute a first cemented lens. The fifth lens L5 and the sixth lens L6 may be cemented to constitute a second cemented lens.

Table 17 shows the radius of curvature R, thickness d/distance T, refractive index Nd, and dispersion coefficient Vd of each lens of the optical lens of example 9. Table 18 shows cone coefficients and higher order term coefficients that can be used for each aspherical mirror surface in example 9, where each aspherical surface profile can be defined by the formula (1) given in example 1 above.

TABLE 17

Face number	k	A4	A6	A8	A10
						S3	-2.1317	2.5541E-03	-1.3217E-04	1.8049E-06	1.5510E-07
S4	-17.6217	5.1587E-03	6.1944E-05	-6.7758E-06	9.9413E-07
						S12	10.6244	-7.7393E-03	1.3424E-04	-5.3792E-05	3.5415E-06
S13	20.9150	-5.3182E-03	-7.6627E-06	-1.8880E-06	4.2582E-07

TABLE 18

Example 10

An optical lens according to embodiment 10 of the present application is described below with reference to fig. 10. Fig. 10 shows a schematic structural diagram of an optical lens according to embodiment 10 of the present application.

As shown in fig. 10, the optical lens includes, in order 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 fifth lens L5, a sixth lens L6, and a seventh lens L7.

Table 19 shows the radius of curvature R, thickness d/distance T, refractive index Nd, and dispersion coefficient Vd of each lens of the optical lens of example 10. Table 20 shows cone coefficients and higher order term coefficients that can be used for each aspherical mirror surface in example 10, where each aspherical surface profile can be defined by equation (1) given in example 1 above.

TABLE 19

Face number	k	A4	A6	A8	A10
						S3	-2.1153	3.0308E-03	-2.0021E-04	6.6822E-06	1.7231E-10
S4	-18.0569	6.1021E-03	-3.8315E-05	8.8319E-07	7.2455E-07
						S12	30.1250	-7.7955E-03	1.2221E-04	-5.2695E-05	3.5037E-06
S13	12.3540	-5.5468E-03	2.1942E-05	-3.6470E-06	4.8370E-07

Table 20

Example 11

An optical lens according to embodiment 11 of the present application is described below with reference to fig. 11. Fig. 11 shows a schematic structural view of an optical lens according to embodiment 11 of the present application.

As shown in fig. 11, the optical lens includes, in order 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 fifth lens L5, a sixth lens L6, and a seventh lens L7.

The first lens L1 is a convex-concave lens having negative optical power, the object-side surface S1 thereof is a convex surface, and the image-side surface S2 thereof is a concave surface. The second lens element L2 has a concave object-side surface S3 and a convex image-side surface S4. The third lens element L3 has a convex-concave lens element with positive refractive power, and has a convex object-side surface S5 and a concave image-side surface S6. The fourth lens element L4 has a convex object-side surface S6 and a convex image-side surface S7. The fifth lens element L5 has a convex object-side surface S9 and a convex image-side surface S10, respectively, and has positive optical power. The sixth lens element L6 has a concave object-side surface S10 and a convex image-side surface S11, and has negative refractive power. The seventh lens L7 is a concave-convex lens having positive optical power, and the object-side surface S12 is a concave surface and the image-side surface S13 is a convex surface. The third lens L3 and the fourth lens L4 may be cemented to constitute a first cemented lens. The fifth lens L5 and the sixth lens L6 may be cemented to constitute a second cemented lens.

Table 21 shows the radius of curvature R, thickness d/distance T, refractive index Nd, and dispersion coefficient Vd of each lens of the optical lens of example 11. Table 22 shows cone coefficients and higher order term coefficients that can be used for each aspherical mirror surface in example 11, where each aspherical surface profile can be defined by the formula (1) given in example 1 above.

Table 21

Face number	k	A4	A6	A8	A10
						S3	-1.3723	3.4747E-03	-1.6552E-04	1.4354E-06	2.4783E-07
S4	-5.2062	5.7781E-03	-4.6216E-05	-3.3447E-06	6.6329E-07
						S12	81.5465	-7.7723E-03	1.3251E-05	-2.7722E-05	5.0800E-06
S13	-31.0563	-7.1557E-03	3.0343E-04	-1.8032E-05	1.0648E-06

Table 22

Example 12

An optical lens according to embodiment 12 of the present application is described below with reference to fig. 12. Fig. 12 shows a schematic structural diagram of an optical lens according to embodiment 12 of the present application.

As shown in fig. 12, the optical lens includes, in order 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 fifth lens L5, a sixth lens L6, and a seventh lens L7.

The first lens L1 is a convex-concave lens having negative optical power, the object-side surface S1 thereof is a convex surface, and the image-side surface S2 thereof is a concave surface. The second lens element L2 has a concave object-side surface S3 and a convex image-side surface S4. The third lens element L3 has a convex-concave lens element with positive refractive power, and has a convex object-side surface S5 and a concave image-side surface S6. The fourth lens element L4 has a convex object-side surface S6 and a convex image-side surface S7. The fifth lens element L5 has a convex object-side surface S9 and a convex image-side surface S10, respectively, and has positive optical power. The sixth lens element L6 has a concave object-side surface S10 and a convex image-side surface S11, and has negative refractive power. The seventh lens L7 is a concave-convex lens having negative optical power, and the object-side surface S12 is a concave surface and the image-side surface S13 is a convex surface. The third lens L3 and the fourth lens L4 may be cemented to constitute a first cemented lens. The fifth lens L5 and the sixth lens L6 may be cemented to constitute a second cemented lens.

Table 23 shows the radius of curvature R, thickness d/distance T, refractive index Nd, and dispersion coefficient Vd of each lens of the optical lens of example 12. Table 24 shows cone coefficients and higher order term coefficients that can be used for each of the aspherical mirror surfaces in example 12, wherein each of the aspherical surface profiles can be defined by the formula (1) given in example 1 above.

Table 23

Face number	k	A4	A6	A8	A10
						S3	-1.5833	3.6104E-03	-1.7542E-04	1.0282E-06	2.6520E-07
S4	-6.2785	6.0278E-03	-1.0642E-05	-4.3229E-06	9.2650E-07
						S12	36.4850	-7.6174E-03	9.6567E-05	-4.2587E-05	4.6849E-06
S13	-16.2155	-8.0069E-03	1.8113E-04	-8.2864E-06	5.5741E-07

Table 24

In summary, examples 1 to 12 satisfy the relationships shown in tables 25-1 and 25-2, respectively, below. In tables 25-1 and 25-2, TTL, BFL, F, D, H, F, F2, F3, F4, F5, F6, F7, F34, F56, R1, R2, R3, R4, R12, R13, T12, T45, T67 are in millimeters (mm) and FOV is in degrees (°).

TABLE 25-1

TABLE 25-2

The present application also provides an electronic device, which may include the optical lens according to the above-described embodiment of the present application and an imaging element for converting an optical image formed by the optical lens into an electrical signal. The electronic device may be a stand-alone electronic device such as a detection range camera or may be an imaging module integrated with such a detection range device. The electronic device may also be a stand-alone imaging device, such as an onboard camera, or an imaging module integrated on, for example, a driving assistance system.

The above description is only illustrative of the preferred embodiments of the present application and of the principles of the technology employed. It will be appreciated by persons skilled in the art that the scope of the application referred to in the present application is not limited to the specific combinations of the technical features described above, but also covers other technical features formed by any combination of the technical features described above or their equivalents without departing from the inventive concept. Such as the above-mentioned features and the technical features disclosed in the present application (but not limited to) having similar functions are replaced with each other.

Claims

1. The optical lens assembly includes, 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;

A second lens having negative optical power;

A third lens having positive optical power, the object side surface of which is a convex surface;

a fourth lens element with optical power, the image-side surface of which is convex;

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 with negative focal power, the object side surface of which is a concave surface; and

A seventh lens having optical power;

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

The distance TTL from the center of the object side surface of the first lens to the imaging surface of the optical lens on the optical axis and the total effective focal length F of the optical lens satisfy: TTL/F is less than or equal to 5.3903;

the total effective focal length F of the optical lens and the curvature radius R1 of the object side surface of the first lens satisfy the following conditions: the F/R1 is less than or equal to 0.3;

The distance T12 between the center of the image side of the first lens and the center of the object side of the second lens on the optical axis and the distance TTL between the center of the object side of the first lens and the imaging surface of the optical lens on the optical axis satisfy: T12/TTL is not less than 0.1267.

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

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

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

5. The optical lens of claim 1, wherein an image side surface of the third lens is convex.

6. The optical lens of claim 1, wherein an image side surface of the third lens is concave.

7. The optical lens of claim 1, wherein the fourth lens has negative optical power and the object-side surface is concave.

8. The optical lens of claim 1, wherein the fourth lens has positive optical power and the object-side surface thereof is concave.

9. The optical lens of claim 1, wherein the fourth lens has positive optical power and has a convex object-side surface.

10. The optical lens of claim 1, wherein an image side surface of the sixth lens is concave.

11. The optical lens of claim 1, wherein an image side surface of the sixth lens is convex.

12. The optical lens of claim 1, wherein the seventh lens has positive optical power and has a convex object-side surface and a convex image-side surface.

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

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

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

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

17. The optical lens of claim 1, wherein,

The third lens and the fourth lens are glued to form a first glued lens; and

The fifth lens and the sixth lens are cemented to form a second cemented lens.

18. The optical lens of claim 1, wherein the second lens and the seventh lens each have an aspherical mirror surface.

19. The optical lens system of any one of claims 1-18, wherein a distance BFL between a center of an image side of the seventh lens element and an imaging surface of the optical lens element on the optical axis and a distance TTL between a center of an object side of the first lens element and an imaging surface of the optical lens element on the optical axis satisfy: BFL/TTL is more than or equal to 0.1.

20. The optical lens system according to any one of claims 1-18, 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 is not more than 180 DEG and not more than 18.

21. The optical lens of any one of claims 1-18, wherein an effective focal length F1 of the first lens and a total effective focal length F of the optical lens satisfy: the F1/F is more than or equal to 1.5.

22. The optical lens of any of claims 1-18, wherein a radius of curvature R3 of an object-side surface of the second lens and a radius of curvature R4 of an image-side surface of the second lens satisfy: (R3-R4)/(R3+R4) I is more than or equal to 0.3.

23. The optical lens of any one of claims 1-18, wherein a combined focal length F34 of the third lens and the fourth lens and a total effective focal length F of the optical lens satisfy: and F34/F is more than or equal to 1.

24. The optical lens of any of claims 1-18, wherein a distance TTL from a center of an object side surface of the first lens to an imaging surface of the optical lens on the optical axis, an image height H corresponding to a maximum field angle of the optical lens, and a maximum field angle FOV of the optical lens satisfy: TTL/H/FOV is not more than 180 DEG and not more than 18.

25. The optical lens of any of claims 1-18, 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: dn/dm is less than or equal to 2.5, wherein n and m are selected from 1,2, 3, 4, 5, 6 and 7.

26. The optical lens system according to any one of claims 1-18, wherein a separation distance T45 between a center of an image side surface of the fourth lens element and a center of an object side surface of the fifth lens element on the optical axis and a distance TTL between a center of an object side surface of the first lens element and an imaging surface of the optical lens element on the optical axis satisfy: T45/TTL is more than or equal to 0.008 and less than or equal to 0.5.

27. The optical lens system of any one of claims 1-18, wherein a distance T67 between a center of an image side of the sixth lens element and a center of an object side of the seventh lens element on the optical axis and a distance TTL between a center of an object side of the first lens element and an imaging surface of the optical lens element on the optical axis satisfy: T67/TTL is more than or equal to 0.05 and less than or equal to 0.2.

28. The optical lens of any of claims 1-18, wherein a radius of curvature R1 of an object-side surface of the first lens and a radius of curvature R2 of an image-side surface of the first lens satisfy: R1/R2 is more than or equal to 4 and less than or equal to 25.

29. The optical lens assembly includes, in order from an object side to an image side along an optical axis:

a first lens having negative optical power;

A second lens having negative optical power;

A fourth lens having optical power;

a fifth lens having positive optical power;

A sixth lens having negative optical power; and

A seventh lens having optical power;

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

A distance T67 between the center of the image side surface of the sixth lens element and the center of the object side surface of the seventh lens element on the optical axis and a distance TTL between the center of the object side surface of the first lens element and the imaging surface of the optical lens element on the optical axis satisfy: T67/TTL is more than or equal to 0.05 and less than or equal to 0.2;

30. The optical lens of claim 29, wherein the first lens element has a convex object-side surface and a concave image-side surface.

31. The optical lens of claim 29, wherein the second lens element has a concave object-side surface and a concave image-side surface.

32. The optical lens of claim 29, wherein the second lens element has a convex object-side surface and a concave image-side surface.

33. The optical lens of claim 29, wherein the second lens element has a concave object-side surface and a convex image-side surface.

34. The optical lens of claim 29, wherein an image side of the third lens is convex.

35. The optical lens of claim 29, wherein the image-side surface of the third lens is concave.

36. The optical lens of claim 29, wherein the fourth lens element has negative optical power and has a concave object-side surface and a convex image-side surface.

37. The optical lens of claim 29, wherein the fourth lens element has positive optical power and has a concave object-side surface and a convex image-side surface.

38. The optical lens of claim 29, wherein the fourth lens element has positive optical power and has a convex object-side surface and a convex image-side surface.

39. The optical lens of claim 29, wherein the fifth lens element has a convex object-side surface and a convex image-side surface.

40. The optical lens of claim 29, wherein the sixth lens element has a concave object-side surface and a concave image-side surface.

41. The optical lens of claim 29, wherein the sixth lens element has a concave object-side surface and a convex image-side surface.

42. The optical lens of claim 29, wherein the seventh lens element has positive optical power and has a convex object-side surface and a convex image-side surface.

43. The optical lens of claim 29, wherein the seventh lens element has positive optical power and has a convex object-side surface and a concave image-side surface.

44. The optical lens of claim 29, wherein the seventh lens element has negative optical power and has a convex object-side surface and a concave image-side surface.

45. The optical lens of claim 29, wherein the seventh lens element has positive optical power and has a concave object-side surface and a convex image-side surface.

46. The optical lens of claim 29, wherein the seventh lens element has negative optical power and has a concave object-side surface and a convex image-side surface.

47. The optical lens of claim 29, wherein,

The third lens and the fourth lens are glued to form a first glued lens; and

The fifth lens and the sixth lens are cemented to form a second cemented lens.

48. The optical lens of claim 29, wherein the second lens and the seventh lens each have an aspherical mirror surface.

49. The optical lens assembly of any one of claims 29-48, wherein a distance BFL between a center of an image side of the seventh lens element and an imaging surface of the optical lens assembly on the optical axis and a distance TTL between a center of an object side of the first lens element and an imaging surface of the optical lens assembly on the optical axis satisfy: BFL/TTL is more than or equal to 0.1.

50. The optical lens system of any of claims 29-48 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 is not more than 180 DEG and not more than 18.

51. The optical lens of any of claims 29-48 wherein an effective focal length F1 of the first lens and a total effective focal length F of the optical lens satisfy: the F1/F is more than or equal to 1.5.

52. The optical lens system of any of claims 29-48 wherein the radius of curvature R3 of the object-side surface of the second lens and the radius of curvature R4 of the image-side surface of the second lens satisfy: (R3-R4)/(R3+R4) I is more than or equal to 0.3.

53. The optical lens of any of claims 29-48 wherein a combined focal length F34 of the third lens and the fourth lens and a total effective focal length F of the optical lens satisfy: and F34/F is more than or equal to 1.

54. The optical lens of any of claims 29-48 wherein a distance TTL from a center of an object side of the first lens to an imaging surface of the optical lens on the optical axis, an image height H corresponding to a maximum field angle of the optical lens, and a maximum field angle FOV of the optical lens satisfy: TTL/H/FOV is not more than 180 DEG and not more than 18.

55. The optical lens of any of claims 29-48, wherein a center thickness dn of an nth lens having a largest center thickness among the first lens to the seventh lens and a center thickness dm of an mth lens having a smallest center thickness among the first lens to the seventh lens satisfy: dn/dm is less than or equal to 2.5, wherein n and m are selected from 1, 2, 3, 4, 5, 6 and 7.

56. The optical lens system of any one of claims 29-48 wherein a distance T45 between a center of an image side of the fourth lens element and a center of an object side of the fifth lens element on the optical axis and a distance TTL between a center of an object side of the first lens element and an imaging plane of the optical lens element on the optical axis satisfy: T45/TTL is more than or equal to 0.008 and less than or equal to 0.5.

57. The optical lens of any of claims 29-48 wherein the radius of curvature R1 of the object-side surface of the first lens and the radius of curvature R2 of the image-side surface of the first lens satisfy: R1/R2 is more than or equal to 4 and less than or equal to 25.

58. An electronic device comprising an optical lens according to any one of claims 1 to 57 and an imaging element for converting an optical image formed by the optical lens into an electrical signal.