CN113759497A

CN113759497A - Optical lens and electronic device

Info

Publication number: CN113759497A
Application number: CN202010461914.3A
Authority: CN
Inventors: 王一峰; 王东方; 马奥林; 姚波
Original assignee: Ningbo Sunny Automotive Optech Co Ltd
Current assignee: Ningbo Sunny Automotive Optech Co Ltd
Priority date: 2020-05-27
Filing date: 2020-05-27
Publication date: 2021-12-07

Abstract

The application discloses an optical lens and electronic equipment including the same, the optical lens 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 with focal power, wherein the object side surface of the second lens is a concave surface, and the image side surface of the second lens is a convex surface; a third lens having a positive optical power; the fourth lens with positive focal power has a convex object-side surface and a convex image-side surface; the fifth lens with positive focal power has a convex object-side surface and a convex image-side surface; a sixth lens having a negative optical power; and a seventh lens having positive optical power, wherein the fifth lens and the sixth lens form a cemented lens.

Description

Optical lens and electronic device

Technical Field

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

Background

In recent years, automobile driving assistance systems have been developed at a high speed, and vehicle-mounted optical lenses play an irreplaceable role as eyes for acquiring external information of automobiles. In order to obtain information more accurately, the system needs to be matched with a large chip with higher resolution, so that the requirement for resolving images of the optical lens is higher and higher. In order to meet the requirement of higher imaging quality, more lens structures are often selected, but the cost is increased, and the miniaturization of the lens is also seriously influenced.

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

Therefore, in the market, an optical lens capable of matching with a large chip, having high resolution, low cost, miniaturization, small distortion, good temperature performance and the like is needed, and the requirements of automatic driving application can be met.

Disclosure of Invention

An aspect of the present application provides an optical lens that may include, 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 with focal power, wherein the object side surface of the second lens is a concave surface, and the image side surface of the second lens is a convex surface; a third lens having a positive optical power; the fourth lens with positive focal power has a convex object-side surface and a convex image-side surface; the fifth lens with positive focal power has a convex object-side surface and a convex image-side surface; a sixth lens having a negative optical power; and a seventh lens having a positive optical power, wherein the fifth lens and the sixth lens form a cemented lens.

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

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

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

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

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

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

In one embodiment, the total optical length TTL of the optical lens and the entire group focal length F of the optical lens may satisfy: TTL/F is less than or equal to 10.

In one embodiment, the maximum field angle FOV of the optical lens, the maximum clear 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 0.02.

In one embodiment, the optical back focus BFL of the optical lens and the lens group length TL of the optical lens may satisfy: BFL/TL is more than or equal to 0.1.

In one embodiment, the entire group of focal length values 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: 50 is less than or equal to (FOV multiplied by F)/H is less than or equal to 70.

In one embodiment, the focal length value F3 of the third lens and the focal length value F4 of the fourth lens may satisfy: and the | F3/F4| is more than or equal to 0.6.

In one embodiment, the focal length value F4 of the fourth lens and the focal length value F5 of the fifth lens may satisfy: the absolute value of F4/F5 is more than or equal to 0.5 and less than or equal to 2.5.

In one embodiment, the focal length value F5 of the fifth lens and the focal length value F6 of the sixth lens may satisfy: the absolute value of F5/F6 is more than or equal to 0.5 and less than or equal to 3.5.

In one embodiment, the entire set of focal length values F of the optical lens and the radius of curvature R11 of the object side surface of the first lens may satisfy: the | F/R11| is less than or equal to 0.5.

In one embodiment, the radius of curvature R12 of the image-side surface of the first lens and the radius of curvature R21 of the object-side surface of the second lens may satisfy: R12/R21 is not less than-1.0.

In one embodiment, the radius of curvature R41 of the object-side surface of the fourth lens and the radius of curvature R42 of the image-side surface of the fourth lens may satisfy: R41/R42 is less than or equal to-0.2.

In one embodiment, the entire group of focal length values 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: (H-FOV xF)/FOV xF is less than or equal to-0.4.

In one embodiment, the separation distance d4 between the second lens and the third lens on the optical axis and the total optical length TTL of the optical lens can satisfy: d4/TTL is less than or equal to 0.004.

In one embodiment, the radius of curvature R11 of the object-side surface of the first lens and the radius of curvature R12 of the image-side surface of the first lens may satisfy: R11/R12 is more than or equal to 2.0 and less than or equal to 8.0.

In one embodiment, the image height H corresponding to the maximum field angle of the optical lens and the entire group of focal length values F of the optical lens satisfy: F/H is less than or equal to 0.55.

Another aspect of the present application provides an optical lens that may include, in order from an object side to an image side along an optical axis: a first lens element having a convex object-side surface and a concave image-side surface; a second lens element having a concave object-side surface and a convex image-side surface; a third lens; a fourth lens element having a convex object-side surface and a convex image-side surface; a fifth lens element having a convex object-side surface and a convex image-side surface; a sixth lens; a seventh lens; and the fifth lens and the sixth lens form a cemented lens. The whole group of focal length values 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 can satisfy the following conditions: (H-FOV xF)/FOV xF is less than or equal to-0.4.

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

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

In one embodiment, the sixth lens element can have a negative optical power, and the object side surface can be concave and the image side surface can be concave.

In one embodiment, the sixth lens element can have a negative power, and the object-side surface can be concave and the image-side surface can be convex.

In one embodiment, the seventh lens element can have a positive optical power, and the object-side surface can be convex and the image-side surface can be convex.

In one embodiment, the seventh lens element can have a positive optical power, and the object side surface can be convex and the image side surface can be concave.

In one embodiment, the separation distance d4 between the second lens and the third lens on the optical axis and the total optical length TTL of the optical lens satisfy: d4/TTL is less than or equal to 0.004.

Another aspect of the present 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 optical lens provided by the application adopts a plurality of lenses, such as the first lens to the seventh lens, and at least one of the beneficial effects of high resolution, miniaturization, small front end caliber, large visual angle, small distortion, low cost and the like of the optical lens is realized by optimally setting the shapes of the lenses, reasonably distributing the focal power of each lens, forming a cemented lens and the like.

Drawings

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

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

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

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

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

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

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

fig. 7 shows a schematic structural diagram of an optical lens according to embodiment 7 of the present application;

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

fig. 9 is a schematic structural view showing an optical lens according to embodiment 9 of the present application; and

fig. 10 shows a schematic structural diagram of an optical lens according to embodiment 10 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 the detailed description is merely illustrative of exemplary embodiments of the present application and does not limit the scope of the present 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 this specification, the expressions first, second, third, etc. are used only to distinguish one feature from another, and do not represent any limitation on the features. Thus, the first lens discussed below may also be referred to as the second lens or the third lens without departing from the teachings of the present application.

In the drawings, the thickness, size, and shape of the lens have been slightly exaggerated for convenience of explanation. In particular, the shapes of the spherical or aspherical surfaces shown in the drawings are shown by way of example. That is, the shape of the spherical surface or the aspherical surface is not limited to the shape of the spherical surface or the aspherical surface shown in the drawings. The figures are purely diagrammatic and 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, it means that the lens surface is convex at least in the paraxial region; if the lens surface is concave and the concave position is not defined, it means that the lens surface is concave at least in the paraxial region. The surface of each lens closest to the object is called the object side surface of the lens, and the surface of each lens closest to the imaging surface is called the image side surface of the lens.

It will be further understood that the terms "comprises," "comprising," "has," "having," "includes" 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. Moreover, when a statement such as "at least one of" appears after a list of listed features, the entirety of the listed features is modified rather than modifying individual elements in the list. Furthermore, when describing embodiments of the present application, the use of "may" mean "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 the embodiments and features of the embodiments in the present application may be combined with each other without conflict. The present application will be described in detail below with reference to the embodiments with reference to the attached drawings.

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

An optical lens according to an exemplary embodiment of the present application may include, for example, seven lenses having optical powers, 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 embodiment of the present application may further include a photosensitive element disposed on the image plane. 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 can have negative focal power, the imaging quality of the optical lens can be improved, the object space light is prevented from being excessively dispersed, and the aperture of the rear lens can be controlled. The first lens is arranged in a meniscus shape, the object side surface of the first lens can be a convex surface, the image side surface of the first lens can be a concave surface, and the first lens can collect light rays with a large visual field as much as possible and enter a rear system, so that the light flux can be effectively increased and the whole large visual field range can be realized; meanwhile, the object side surface of the first lens is arranged to be convex, so that water drops can slide off in actual use environments (such as rainy and snowy weather), and the influence of severe environments on imaging can be effectively reduced.

The second lens can have positive focal power or negative focal power, so that the light rays can be favorably further converged or diverged, and the chromatic aberration of the system can be reduced by adjusting the light rays. The object side surface and the image side surface of the second lens are preferably arranged to be aspheric mirror surfaces to improve the resolution quality of the optical lens.

The third lens can have positive focal power, which is beneficial to converging light and adjusting the light so as to enable the optics to be stably transited to the rear lens; and the spherical aberration introduced by the first and second lenses can be balanced.

The fourth lens can have positive focal power, and is favorable for converging light rays and adjusting the light rays so as to enable the optics to be stably transited to the rear lens. The object side surface and the image side surface of the fourth lens are preferably arranged to be aspheric mirror surfaces to further improve the resolution quality of the optical lens.

The fifth lens may have a positive optical power, the sixth lens may have a negative optical power, and the fifth lens and the sixth lens are combined into a cemented lens.

As known to those skilled in the art, cemented lenses may be used to minimize 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 process in the lens manufacturing process.

The image side surface of the fifth lens and the object side surface of the sixth lens are glued to form a cemented lens, so that light rays passing through the fourth lens can be smoothly transited to an imaging surface; the air space between the lenses is reduced, and the total length of the whole system is reduced; and various aberrations in the optical system can be fully corrected, so that the resolution of the optical lens is further improved and optical performances such as distortion, a Chief Ray Angle (Chief-Ray-Angle) and the like are optimized on the premise that the optical system has a more compact structure.

The provision of the cemented lens can achieve the following advantageous effects: the air space between the fifth lens and the sixth lens is reduced, and the total length of the whole optical system is reduced; the assembly parts between the fifth lens and the sixth lens are reduced, the processing procedures of the optical lens are reduced, and the manufacturing cost of the lens is reduced; the problems of tolerance sensitivity and the like of the lens unit caused by inclination/core deviation in the assembling process are reduced; the light quantity loss caused by reflection among the lenses is reduced, and the illumination of the optical lens is improved; and further reduces the curvature of field of the optical system, correcting the off-axis point aberration of the system.

The seventh lens can have positive focal power, can smoothly transition light rays passing through the cemented lens to an imaging surface, reduces the total length of the optical lens, corrects astigmatism and curvature of field of the system, and improves the resolution of the optical lens. The object side surface and the image side surface of the seventh lens are preferably arranged to be aspheric mirror surfaces to further improve the resolution quality of the optical lens.

Optionally, diaphragms for limiting light beams can be arranged on the third lens and the fourth lens, so that the imaging quality of the lens is further improved. When the diaphragm is arranged between the third lens and the fourth lens, the effective beam collection of light rays entering the optical system can be facilitated, and further the total length of the optical system and the front end aperture of the lens are reduced. It should be noted, however, that the positions of the diaphragms disclosed herein are merely examples and not limitations; in alternative embodiments, the diaphragm may be disposed at other positions according to actual needs.

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 an image plane.

In an exemplary embodiment, at least one of the mirror surfaces of each lens is an aspheric mirror surface, i.e., at least one of the object side surface of the first lens to the image side surface of the seventh lens is an aspheric mirror surface. The aspheric lens is characterized in that: the curvature varies continuously from the center of the lens to the periphery of the lens. Unlike a spherical lens having a constant curvature from the center of the lens to the periphery of the lens, an aspherical lens has better curvature radius characteristics, and has advantages of improving distortion aberration and improving astigmatic aberration. After the aspheric lens is adopted, the aberration generated during imaging can be eliminated as much as possible, thereby improving the imaging quality. Optionally, at least one of an object-side surface and an image-side surface of each of the first lens, the second lens, the third lens, the fourth lens, the fifth lens, the sixth lens, and the seventh lens is an aspheric mirror surface. Optionally, each of the first lens, the second lens, the third lens, the fourth lens, the fifth lens, the sixth lens and the seventh lens has an object-side surface and an image-side surface which are aspheric mirror surfaces.

In an exemplary embodiment, the total optical length TTL of the optical lens and the entire set of focal length values F of the optical lens may satisfy: TTL/F is less than or equal to 10. For example, TTL/F ≦ 9. The total length of the optical lens can be effectively reduced and the miniaturization of the optical lens can be realized by restraining the ratio of the total optical length of the system to the total focal length within a reasonable numerical range.

In an exemplary embodiment, the maximum field angle FOV of the optical lens, the maximum clear 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 0.02. For example, D/H/FOV ≦ 0.015. The maximum field angle of the optical lens, the maximum light-passing half aperture 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 are reasonably controlled, so that the small aperture at the front end of the optical lens can be ensured, and the miniaturization of the optical lens is facilitated; and the optical total length of the lens can be shortened, the sensitivity of the lens to a film Transfer Function (Modulation Transfer Function) is reduced, the production yield of the lens is improved, and the production cost is reduced.

In an exemplary embodiment, the optical back focus BFL of the optical lens and the lens group length TL of the optical lens may satisfy: BFL/TL is more than or equal to 0.1. For example, BFL/TL ≧ 0.11. The ratio of the optical back focal length of the optical lens to the lens group length of the optical lens is restricted within a reasonable numerical range, so that the optical back focal length is realized on the basis of realizing miniaturization, and the assembly of the module is facilitated.

In an exemplary embodiment, the image height H corresponding to the whole set of focal length values F of the optical lens, the maximum field angle FOV of the optical lens, and the maximum field angle of the optical lens may satisfy: 50 is less than or equal to (FOV multiplied by F)/H is less than or equal to 70. For example, 55 ≦ (FOV × F)/H ≦ 65. The mutual relation among the whole group of focal length values 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 large-angle resolution of the optical lens can be realized; the optical system is beneficial to improving the overall effect of the optical system while meeting the requirements of small distortion and large field angle of the optical lens.

In an exemplary embodiment, the focal length value F3 of the third lens and the focal length value F4 of the fourth lens may satisfy: and the | F3/F4| is more than or equal to 0.6. For example, | F3/F4| ≧ 0.7 makes the distance between the adjacent third lens and fourth lens very close by constraining the ratio of the focal length values of the third lens and fourth lens within a reasonable numerical range, which is beneficial for the smooth transition of light to the rear imaging plane and improves the resolution quality of the optical lens.

In an exemplary embodiment, the focal length value F4 of the fourth lens and the focal length value F5 of the fifth lens may satisfy: the absolute value of F4/F5 is more than or equal to 0.5 and less than or equal to 2.5. For example, 1.0. ltoreq. F4/F5. ltoreq.2.0. The ratio of the focal length values of the fourth lens and the fifth lens is restricted within a reasonable numerical range, so that the distance between the adjacent fourth lens and the adjacent fifth lens is very short, light can smoothly pass to a rear imaging surface, and the resolution quality of the optical lens is improved.

In an exemplary embodiment, the focal length value F5 of the fifth lens and the focal length value F6 of the sixth lens may satisfy: the absolute value of F5/F6 is more than or equal to 0.5 and less than or equal to 3.5. For example, 1.0. ltoreq. F5/F6. ltoreq.3.0. The ratio of the focal length values of the fifth lens and the sixth lens is restricted within a reasonable numerical range, so that the distance between the adjacent fifth lens and the adjacent sixth lens is very short, the smooth transition of light to a rear imaging surface is facilitated, and the resolution quality of the optical lens is improved.

In an exemplary embodiment, the entire set of focal length values F of the optical lens and the radius of curvature R11 of the object side surface of the first lens may satisfy: the | F/R11| is less than or equal to 0.5. For example, | F/R11| ≦ 0.4. The ratio of the whole group of focal length values of the optical lens to the curvature radius of the object side surface of the first lens is restricted within a reasonable numerical range, so that the problem that the curvature radius of the object side surface of the first lens is too small can be avoided, aberration generated by a system when light rays enter is effectively avoided, and the production and processing of the first lens are facilitated.

In an exemplary embodiment, the radius of curvature R12 of the image-side surface of the first lens and the radius of curvature R21 of the object-side surface of the second lens may satisfy: R12/R21 is not less than-1.0. For example, R12/R21 ≧ 0.9. By restraining the ratio of the curvature radius of the image side surface of the first lens and the curvature radius of the object side surface of the second lens within a reasonable numerical range, the aberration of the optical system can be corrected, and when the light emitted from the first lens enters the object side surface of the second lens, the incident light is smooth, so that the tolerance sensitivity of the optical lens is reduced.

In an exemplary embodiment, the radius of curvature R41 of the object-side surface of the fourth lens and the radius of curvature R42 of the image-side surface of the fourth lens may satisfy: R41/R42 is less than or equal to-0.2. For example, R41/R42. ltoreq.0.25. By restricting the ratio of the curvature radius of the object side surface and the curvature radius of the image side surface of the fourth lens within a reasonable numerical range, the tolerance sensitivity of the fourth lens can be reduced, and the assembly of the optical lens is facilitated.

In an exemplary embodiment, the image height H corresponding to the whole set of focal length values F of the optical lens, the maximum field angle FOV of the optical lens, and the maximum field angle of the optical lens may satisfy: (H-FOV xF)/FOV xF is less than or equal to-0.4. For example, (H-FOV XF)/FOV XF ≦ -0.45. The mutual relation among the whole group of focal length values 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 focal length of the lens can be increased under the condition that the field angle and the imaging surface of the optical lens are not changed, and the imaging effect of the central area of the imaging surface of the lens is highlighted.

In an exemplary embodiment, the separation distance d4 between the second lens and the third lens on the optical axis and the total optical length TTL of the optical lens may satisfy: d4/TTL is less than or equal to 0.004. For example, d4/TTL ≦ 0.0035. By restraining the ratio of the spacing distance of the second lens and the third lens on the optical axis to the total optical length of the optical lens within a reasonable numerical range, the adjacent second lens and the adjacent third lens are close to each other, the smooth transition of light rays is facilitated, and the resolution quality of the optical lens is improved.

In an exemplary embodiment, the radius of curvature R11 of the object-side surface of the first lens and the radius of curvature R12 of the image-side surface of the first lens may satisfy: R11/R12 is more than or equal to 2.0 and less than or equal to 8.0. For example, 3.2. ltoreq.R 11/R12. ltoreq.6.0. The first lens with a special shape can be arranged by restricting the ratio of the curvature radius of the object side surface and the curvature radius of the image side surface of the first lens within a reasonable numerical range, so that the resolution of the optical lens is improved.

In an exemplary embodiment, the image height H corresponding to the maximum field angle of the optical lens and the entire set of focal length values F of the optical lens may satisfy: F/H is less than or equal to 0.55. For example, F/H ≦ 0.50. By restricting the ratio of the whole group of focal length values of the optical lens to the image height corresponding to the maximum field angle of the optical lens within a reasonable numerical range, the resolution quality of the optical lens is improved.

The optical lens according to the above-described embodiment of the present application may employ a plurality of lenses, for example, seven lenses as described above. By reasonably distributing the focal power and the surface shape of each lens, the focal length value of each lens, the curvature radius of each lens and the like, incident light can be effectively converged, the optical total length of the optical lens is shortened, the machinability of the optical lens is improved, and the optical lens is more favorable for production and processing. The optical lens according to the above-described embodiment of the present application can have characteristics such as high resolution, low cost, long back focus, excellent temperature performance, miniaturization, large aperture, small front end aperture, and simple structure with reasonable use of a cemented element.

However, it will be understood by those skilled in the art that the number of lenses constituting the optical lens may be varied to obtain the respective results and advantages described in the present specification without departing from the technical solutions claimed in the present application. For example, although seven lenses are exemplified 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 an optical lens applicable to the above-described embodiments are further described below with reference to the 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 view showing a structure of an optical lens according to embodiment 1 of the present application.

As shown in fig. 1, the optical lens, in order from an object side to an image side along an optical axis, comprises: 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 first lens L1 is a meniscus lens with negative power, the object-side surface S1 is convex, the image-side surface S2 is concave, and both the object-side surface S1 and the image-side surface S2 of the first lens L1 are spherical.

The second lens L2 is a meniscus lens with negative power, the object-side surface S3 is concave, the image-side surface S4 is convex, and both the object-side surface S3 and the image-side surface S4 of the second lens L2 are aspheric.

The third lens L3 is a meniscus lens with positive power, the object-side surface S5 is convex, the image-side surface S6 is concave, and both the object-side surface S5 and the image-side surface S6 of the third lens L3 are spherical.

The fourth lens element L4 is a biconvex lens with positive refractive power, and has a convex object-side surface S8 and a convex image-side surface S9, and the object-side surface S8 and the image-side surface S9 of the fourth lens element L4 are both spherical.

The fifth lens element L5 is a biconvex lens with positive refractive power, and has a convex object-side surface S10 and a convex image-side surface S11, and both the object-side surface S10 and the image-side surface S11 of the fifth lens element L5 are spherical surfaces.

The sixth lens L6 is a biconcave lens with negative power, the object-side surface S11 is concave, the image-side surface S12 is concave, and both the object-side surface S11 and the image-side surface S12 of the sixth lens L6 are spherical.

The seventh lens element L7 is a biconvex lens with positive refractive power, and has a convex object-side surface S13 and a convex image-side surface S14, and both the object-side surface S13 and the image-side surface S14 of the seventh lens element L7 are 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 and/or a cover glass L8 having an object side S15 and an image side S16. A filter L8 may be used to correct color deviations and a cover glass L8 may be used to protect the image sensor chip at the imaging plane IMA. Light from the object passes through each of the surfaces S1 to S16 in sequence 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 1 shows a basic parameter table of the optical lens of embodiment 1, in which the unit of the radius of curvature and the thickness/distance are both millimeters (mm).

TABLE 1

In the present embodiment, the object-side surface and the image-side surface of the second lens L2 and the seventh lens L7 are both aspheric surfaces, and the surface shape Z of each aspheric lens can be defined by, but is not limited to, the following aspheric surface formula:

wherein Z is the distance rise from the vertex of the aspheric surface when the aspheric surface is at the position with the height of h along the optical axis direction; c is the paraxial curvature of the aspheric surface, c being 1/R (i.e., paraxial curvature c is the inverse of the radius of curvature in table 1 above); k is the conic coefficient conc; A. b, C, D, E, F, etc. are all high order coefficient. Table 2 below shows the conic coefficients k and the respective high-order term coefficients A, B, C, D, E, F and G that can be used for the aspherical lens surfaces S3, S4, S13, and S14 in example 1.

Flour mark

k

A

B

C

D

E

F

G

S3

1.2684

-1.2374E-05

7.7240E-06

-6.0783E-07

1.6966E-07

-1.1705E-08

6.2193E-10

-1.2685E-11

S4

-1.4628

-4.4841E-06

-7.9033E-07

2.1226E-07

-2.3012E-08

6.7009E-10

-1.1026E-11

2.9786E-13

S13

-15.9703

3.7011E-04

2.6797E-05

-3.5926E-06

6.0871E-07

-2.7482E-08

1.8938E-09

-2.9404E-11

S14

-39.7500

-1.3483E-03

2.2433E-04

-1.2757E-05

4.3369E-07

3.8476E-08

-3.6180E-09

9.8141E-11

TABLE 2

Table 3 below gives the optical length TTL of the optical lens of example 1 (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 entire group focal length value F of the optical lens, the maximum clear aperture D of the object-side surface S1 of the first lens L1 corresponding to the maximum field angle FOV of the optical lens, the image height H corresponding to the maximum field angle FOV of the optical lens, and the maximum field angle FOV of the optical lens, an optical back focus BFL of the optical lens (a distance on the optical axis from the center of the image side surface S14 of the seventh lens L7 of the optical lens to the imaging surface IMA of the optical lens), a lens group length TL of the optical lens (a distance on the optical axis from the center of the object side surface S1 of the first lens L1 to the center of the image side surface S14 of the seventh lens L7), a focal length value F3 of the third lens L3, a focal length value F4 of the fourth lens L4, a focal length value F5 of the fifth lens L5, and a focal length value F6 of the sixth lens L6.

TTL(mm)	31.0892	TL(mm)	26.7937
				F(mm)	4.0045	F3(mm)	18.4408
D(mm)	12.4400	F4(mm)	12.8622
				H(mm)	9.0844	F5(mm)	8.9731
FOV(°)	140	F6(mm)	-4.2489
				BFL(mm)	4.2954

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 view showing a structure of an optical lens according to embodiment 2 of the present application.

As shown in fig. 2, the optical lens, in order from an object side to an image side along an optical axis, comprises: 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 4 shows a basic parameter table of the optical lens of embodiment 2, in which the unit of the radius of curvature and the thickness/distance are both millimeters (mm).

TABLE 4

Table 5 below shows the conic coefficients k and the respective high-order term coefficients A, B, C, D, E, F and G that can be used for the aspherical lens surfaces S3, S4, S13, and S14 in example 2.

Flour mark

k

A

B

C

D

E

F

G

S3

0.5353

-7.5210E-06

7.3668E-06

-8.6720E-07

1.6880E-07

-1.2034E-08

4.3093E-10

-5.7835E-12

S4

-0.8896

-4.1659E-06

6.1399E-07

1.3109E-07

-9.3904E-09

5.2493E-10

-1.6138E-11

2.1193E-13

S13

-3.2178

2.3653E-04

1.9404E-05

-9.5573E-07

4.4926E-07

-5.8573E-08

2.3132E-09

-3.8477E-11

S14

-132.3455

-1.1984E-03

2.0734E-04

-1.6244E-05

6.7567E-07

4.4360E-08

-5.4141E-09

1.5930E-10

TABLE 5

Table 6 below gives the optical length TTL of the optical lens of example 2 (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 entire group focal length value F of the optical lens, the maximum clear aperture D of the object-side surface S1 of the first lens L1 corresponding to the maximum field angle FOV of the optical lens, the image height H corresponding to the maximum field angle FOV of the optical lens, and the maximum field angle FOV of the optical lens, an optical back focus BFL of the optical lens (a distance on the optical axis from the center of the image side surface S14 of the seventh lens L7 of the optical lens to the imaging surface IMA of the optical lens), a lens group length TL of the optical lens (a distance on the optical axis from the center of the object side surface S1 of the first lens L1 to the center of the image side surface S14 of the seventh lens L7), a focal length value F3 of the third lens L3, a focal length value F4 of the fourth lens L4, a focal length value F5 of the fifth lens L5, and a focal length value F6 of the sixth lens L6.

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 view showing a structure of an optical lens according to embodiment 3 of the present application.

As shown in fig. 3, the optical lens, in order from an object side to an image side along an optical axis, comprises: 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 second lens L2 is a meniscus lens with positive power, the object-side surface S3 is concave, the image-side surface S4 is convex, and both the object-side surface S3 and the image-side surface S4 of the second lens L2 are aspheric.

The third lens element L3 is a biconvex lens with positive refractive power, and has a convex object-side surface S5 and a convex image-side surface S6, and both the object-side surface S5 and the image-side surface S6 of the third lens element L3 are spherical.

Table 7 shows a basic parameter table of the optical lens of example 3, in which the unit of the radius of curvature and the thickness/distance are both millimeters (mm).

TABLE 7

Table 8 below shows the conic coefficients k and the respective high-order term coefficients A, B, C, D, E, F and G that can be used for the aspherical lens surfaces S3, S4, S13, and S14 in example 3.

Flour mark

k

A

B

C

D

E

F

G

S3

1.4743

-1.4187E-04

9.3990E-06

-1.4293E-06

2.3980E-07

-1.9000E-08

7.5766E-10

-1.1690E-11

S4

-1.0840

-5.6427E-05

3.4074E-06

2.7449E-08

-1.2560E-08

7.9147E-10

-2.0674E-11

2.0481E-13

S13

-3.0925

1.1789E-04

3.2921E-05

-4.4977E-06

9.2674E-07

-8.9974E-08

4.4465E-09

-8.6607E-11

S14

-221.9613

-2.6637E-03

2.6839E-04

-1.8173E-05

4.4759E-07

5.2332E-08

-4.2957E-09

1.0208E-10

TABLE 8

Table 9 below gives the optical length TTL of the optical lens of example 3 (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 entire group focal length value F of the optical lens, the maximum clear aperture D of the object-side surface S1 of the first lens L1 corresponding to the maximum field angle FOV of the optical lens, the image height H corresponding to the maximum field angle FOV of the optical lens, and the maximum field angle FOV of the optical lens, an optical back focus BFL of the optical lens (a distance on the optical axis from the center of the image side surface S14 of the seventh lens L7 of the optical lens to the imaging surface IMA of the optical lens), a lens group length TL of the optical lens (a distance on the optical axis from the center of the object side surface S1 of the first lens L1 to the center of the image side surface S14 of the seventh lens L7), a focal length value F3 of the third lens L3, a focal length value F4 of the fourth lens L4, a focal length value F5 of the fifth lens L5, and a focal length value F6 of the sixth lens L6.

TTL(mm)	32.0001	TL(mm)	27.3678
				F(mm)	4.00353	F3(mm)	20.888
D(mm)	14.0204	F4(mm)	12.3
				H(mm)	9.34951	F5(mm)	10.485
FOV(°)	140	F6(mm)	-4.6207
				BFL(mm)	4.6323

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 view showing a structure of an optical lens according to embodiment 4 of the present application.

As shown in fig. 4, the optical lens, in order from an object side to an image side along an optical axis, comprises: 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 10 shows a basic parameter table of the optical lens of example 4, in which the unit of the radius of curvature and the thickness/distance are both millimeters (mm).

Watch 10

Table 11 below shows the conic coefficients k and the respective high-order term coefficients A, B, C, D, E, F and G that can be used for the aspherical lens surfaces S3, S4, S13, and S14 in example 4.

TABLE 11

Table 12 below gives the optical length TTL of the optical lens of example 4 (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 entire group focal length value F of the optical lens, the maximum clear aperture D of the object-side surface S1 of the first lens L1 corresponding to the maximum field angle FOV of the optical lens, the image height H corresponding to the maximum field angle FOV of the optical lens, and the maximum field angle FOV of the optical lens, an optical back focus BFL of the optical lens (a distance on the optical axis from the center of the image side surface S14 of the seventh lens L7 of the optical lens to the imaging surface IMA of the optical lens), a lens group length TL of the optical lens (a distance on the optical axis from the center of the object side surface S1 of the first lens L1 to the center of the image side surface S14 of the seventh lens L7), a focal length value F3 of the third lens L3, a focal length value F4 of the fourth lens L4, a focal length value F5 of the fifth lens L5, and a focal length value F6 of the sixth lens L6.

TTL(mm)	33.0857	TL(mm)	27.4045
				F(mm)	3.9891	F3(mm)	22.7504
D(mm)	12.5597	F4(mm)	12.1312
				H(mm)	9.5599	F5(mm)	10.1036
FOV(°)	140	F6(mm)	-4.4905
				BFL(mm)	5.6812

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 view showing a structure of an optical lens according to embodiment 5 of the present application.

As shown in fig. 5, the optical lens, in order from an object side to an image side along an optical axis, comprises: 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 fourth lens element L4 is a biconvex lens with positive refractive power, and has a convex object-side surface S8 and a convex image-side surface S9, and both the object-side surface S8 and the image-side surface S9 of the fourth lens element L4 are aspheric.

The sixth lens L6 is a meniscus lens with negative power, the object-side surface S11 is concave, the image-side surface S12 is convex, and both the object-side surface S11 and the image-side surface S12 of the sixth lens L6 are spherical.

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

Table 13 shows a basic parameter table of the optical lens of example 5, in which the unit of the radius of curvature and the thickness/distance are both millimeters (mm).

Watch 13

Table 14 below shows the conic coefficients k and the respective high-order term coefficients A, B, C, D, E, F and G that can be used for the aspherical lens surfaces S3, S4, S8, S9, S13 and S14 in example 5.

Flour mark

k

A

B

C

D

E

F

G

S3

-0.5957

4.0390E-04

-4.3642E-06

1.7874E-06

-2.0450E-07

1.2700E-08

-3.8529E-10

4.3195E-12

S4

-2.2779

2.4454E-04

3.3539E-07

2.9720E-07

-1.9963E-08

7.9086E-10

-1.2936E-11

7.3297E-15

S8

1.7704

-1.2450E-04

5.6747E-05

-1.7547E-05

2.1012E-06

-1.4564E-07

5.2612E-09

-8.1970E-11

S9

-59.1945

-7.9032E-04

1.1506E-04

-9.3715E-06

6.0082E-07

-1.8372E-08

-3.9824E-11

1.2062E-11

S13

-14.0684

2.0557E-04

-1.5254E-04

4.4282E-06

-2.6851E-07

1.2460E-10

7.2407E-10

-1.3247E-11

S14

-15.0970

-8.2608E-04

-8.4856E-05

3.6054E-06

-2.6968E-07

1.1097E-08

1.3088E-10

-8.7242E-12

TABLE 14

Table 15 below gives the optical length TTL of the optical lens of example 5 (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 entire group focal length value F of the optical lens, the maximum clear aperture D of the object-side surface S1 of the first lens L1 corresponding to the maximum field angle FOV of the optical lens, the image height H corresponding to the maximum field angle FOV of the optical lens, and the maximum field angle FOV of the optical lens, an optical back focus BFL of the optical lens (a distance on the optical axis from the center of the image side surface S14 of the seventh lens L7 of the optical lens to the imaging surface IMA of the optical lens), a lens group length TL of the optical lens (a distance on the optical axis from the center of the object side surface S1 of the first lens L1 to the center of the image side surface S14 of the seventh lens L7), a focal length value F3 of the third lens L3, a focal length value F4 of the fourth lens L4, a focal length value F5 of the fifth lens L5, and a focal length value F6 of the sixth lens L6.

TTL(mm)	32.2187	TL(mm)	27.7649
				F(mm)	4.0522	F3(mm)	25.3956
D(mm)	12.8343	F4(mm)	11.3608
				H(mm)	9.8932	F5(mm)	8.0009
FOV(°)	140	F6(mm)	-7.1157
				BFL(mm)	4.4538

Watch 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 view showing a structure of an optical lens according to embodiment 6 of the present application.

As shown in fig. 6, the optical lens, in order from an object side to an image side along an optical axis, comprises: 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 sixth lens element L6 is a meniscus lens element with negative refractive power, and has a concave object-side surface S11 and a convex image-side surface S12, and the object-side surface S11 and the image-side surface S12 of the sixth lens element L6 are both spherical.

Table 16 shows a basic parameter table of the optical lens of example 6, in which the unit of the radius of curvature and the thickness/distance are both millimeters (mm).

TABLE 16

Table 17 below shows the conic coefficients k and the respective high-order term coefficients A, B, C, D, E, F and G that can be used for the aspherical lens surfaces S3, S4, S8, S9, S13 and S14 in example 6.

Flour mark

k

A

B

C

D

E

F

G

S3

-0.6091

4.5150E-04

-8.1755E-07

1.7065E-06

-2.0567E-07

1.2565E-08

-3.9046E-10

4.6938E-12

S4

-1.8263

6.9928E-05

6.8789E-07

2.4503E-07

-2.0932E-08

8.9349E-10

-1.8972E-11

1.3604E-13

S8

1.6400

-1.8955E-04

6.7087E-05

-1.7272E-05

2.0820E-06

-1.4521E-07

5.3397E-09

-8.3086E-11

S9

-96.3605

-4.0411E-04

1.1263E-04

-1.0369E-05

6.8871E-07

-1.4033E-08

-5.3734E-10

2.5610E-11

S13

-8.9239

2.1871E-03

-1.0165E-04

5.3766E-06

-2.2452E-07

1.8766E-09

2.6737E-10

-7.1689E-12

S14

-34.9739

4.0942E-04

-4.1072E-05

3.9322E-06

-2.6377E-07

8.3391E-09

4.0165E-11

-4.0334E-12

TABLE 17

Table 18 below gives the optical length TTL of the optical lens of example 6 (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 entire group focal length value F of the optical lens, the maximum clear aperture D of the object-side surface S1 of the first lens L1 corresponding to the maximum field angle FOV of the optical lens, the image height H corresponding to the maximum field angle FOV of the optical lens, and the maximum field angle FOV of the optical lens, an optical back focus BFL of the optical lens (a distance on the optical axis from the center of the image side surface S14 of the seventh lens L7 of the optical lens to the imaging surface IMA of the optical lens), a lens group length TL of the optical lens (a distance on the optical axis from the center of the object side surface S1 of the first lens L1 to the center of the image side surface S14 of the seventh lens L7), a focal length value F3 of the third lens L3, a focal length value F4 of the fourth lens L4, a focal length value F5 of the fifth lens L5, and a focal length value F6 of the sixth lens L6.

TTL(mm)	33.9959	TL(mm)	30.282
				F(mm)	3.9814	F3(mm)	35.5884
D(mm)	13.6171	F4(mm)	12.323
				H(mm)	8.73177	F5(mm)	9.2466
FOV(°)	140	F6(mm)	-7.2681
				BFL(mm)	3.7139

Watch 18

Example 7

An optical lens according to embodiment 7 of the present application is described below with reference to fig. 7. Fig. 7 is a schematic view showing a structure of an optical lens according to embodiment 7 of the present application.

As shown in fig. 7, the optical lens, in order from an object side to an image side along an optical axis, comprises: 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 seventh lens L7 is a meniscus lens with positive power, the object-side surface S13 is concave, the image-side surface S14 is convex, and both the object-side surface S13 and the image-side surface S14 of the seventh lens L7 are aspheric.

Table 19 shows a basic parameter table of the optical lens of example 7, in which the unit of the radius of curvature and the thickness/distance are both millimeters (mm).

Watch 19

The following table 20 shows cone coefficients k and respective high-order term coefficients A, B, C, D, E, F and G which can be used for the aspherical lens surfaces S3, S4, S13 and S14 in example 7.

Flour mark

k

A

B

C

D

E

F

G

S3

-0.4185

-0.000366882

7.28546E-05

-2.0414E-05

3.50761E-06

-3.06463E-07

1.34204E-08

-2.28371E-10

S4

-0.3776

0.00013886

-4.69419E-05

1.32151E-05

-1.28034E-06

8.44047E-08

-2.53842E-09

4.20075E-11

S13

54.1668

-0.003797949

0.000402607

-0.000126444

2.17028E-05

-1.98903E-06

9.69442E-08

-1.95427E-09

S14

-8.316

-0.001661887

3.52361E-05

-9.26698E-06

2.78475E-06

-2.88421E-07

1.47845E-08

-2.97232E-10

Watch 20

Table 21 below gives the optical length TTL of the optical lens of example 7 (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 entire group focal length value F of the optical lens, the maximum clear aperture D of the object-side surface S1 of the first lens L1 corresponding to the maximum field angle FOV of the optical lens, the image height H corresponding to the maximum field angle FOV of the optical lens, and the maximum field angle FOV of the optical lens, an optical back focus BFL of the optical lens (a distance on the optical axis from the center of the image side surface S14 of the seventh lens L7 of the optical lens to the imaging surface IMA of the optical lens), a lens group length TL of the optical lens (a distance on the optical axis from the center of the object side surface S1 of the first lens L1 to the center of the image side surface S14 of the seventh lens L7), a focal length value F3 of the third lens L3, a focal length value F4 of the fourth lens L4, a focal length value F5 of the fifth lens L5, and a focal length value F6 of the sixth lens L6.

TTL(mm)	31.0029	TL(mm)	25.8926
				F(mm)	4.0704	F3(mm)	28.0012
D(mm)	11.7993	F4(mm)	10.8825
				H(mm)	9.2709	F5(mm)	8.0025
FOV(°)	140	F6(mm)	-6.7304
				BFL(mm)	5.1103

TABLE 21

Example 8

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

As shown in fig. 8, the optical lens, in order from an object side to an image side along an optical axis, comprises: 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 22 shows a basic parameter table of the optical lens of example 8, in which the unit of the radius of curvature and the thickness/distance are both millimeters (mm).

TABLE 22

Table 23 below shows the conic coefficients k and the respective high-order term coefficients A, B, C, D, E, F and G that can be used for the aspherical lens surfaces S3, S4, S13, and S14 in example 8.

Flour mark

k

A

B

C

D

E

F

G

S3

-0.4422

-0.000349301

7.50257E-05

-1.90442E-05

3.50294E-06

-3.06192E-07

1.34563E-08

-2.30126E-10

S4

-0.2899

0.000133427

-4.65741E-05

1.1307E-05

-1.18748E-06

8.43207E-08

-2.91045E-09

4.12563E-11

S13

51.1725

-0.003792569

0.000436597

-0.000122492

2.12134E-05

-1.98578E-06

9.72203E-08

-1.97318E-09

S14

-2.3705

-0.001487964

4.57691E-05

-1.08347E-05

2.85032E-06

-2.85189E-07

1.485E-08

-3.07825E-10

TABLE 23

Table 24 below gives the optical length TTL of the optical lens of example 8 (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 entire group focal length value F of the optical lens, the maximum clear aperture D of the object-side surface S1 of the first lens L1 corresponding to the maximum field angle FOV of the optical lens, the image height H corresponding to the maximum field angle FOV of the optical lens, and the maximum field angle FOV of the optical lens, an optical back focus BFL of the optical lens (a distance on the optical axis from the center of the image side surface S14 of the seventh lens L7 of the optical lens to the imaging surface IMA of the optical lens), a lens group length TL of the optical lens (a distance on the optical axis from the center of the object side surface S1 of the first lens L1 to the center of the image side surface S14 of the seventh lens L7), a focal length value F3 of the third lens L3, a focal length value F4 of the fourth lens L4, a focal length value F5 of the fifth lens L5, and a focal length value F6 of the sixth lens L6.

TTL(mm)	31.0016	TL(mm)	25.8675
				F(mm)	4.0784	F3(mm)	28.1821
D(mm)	12.1551	F4(mm)	10.9355
				H(mm)	9.2036	F5(mm)	7.9907
FOV(°)	140	F6(mm)	-6.8386
				BFL(mm)	5.1341

Watch 24

Example 9

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

As shown in fig. 9, the optical lens, in order from an object side to an image side along an optical axis, comprises: 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 seventh lens L7 is a meniscus lens with negative power, the object-side surface S13 is convex, the image-side surface S14 is concave, and both the object-side surface S13 and the image-side surface S14 of the seventh lens L7 are aspheric.

Table 25 shows a basic parameter table of the optical lens of example 9, in which the unit of the radius of curvature and the thickness/distance are both millimeters (mm).

TABLE 25

The following table 26 shows cone coefficients k and respective high-order term coefficients A, B, C, D, E, F and G which can be used for the aspherical lens surfaces S3, S4, S13 and S14 in example 9.

Flour mark

k

A

B

C

D

E

F

G

S3

-0.5577

-0.00018714

0.000100445

-2.18361E-05

3.43419E-06

-2.98238E-07

1.35969E-08

-2.53372E-10

S4

-0.8699

0.000310007

-3.84481E-05

1.07807E-05

-1.25727E-06

8.41332E-08

-2.97016E-09

4.33315E-11

S13

108.426

-0.0064430

0.000494761

-0.000114816

2.14609E-05

-2.00278E-06

1.00904E-07

-2.18071E-09

S14

200.0

-0.003598

0.000187167

-9.13174E-06

2.68951E-06

-2.79732E-07

1.59899E-08

-4.15607E-10

Watch 26

Table 27 below gives the optical length TTL of the optical lens of example 9 (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 entire group focal length value F of the optical lens, the maximum clear aperture D of the object-side surface S1 of the first lens L1 corresponding to the maximum field angle FOV of the optical lens, the image height H corresponding to the maximum field angle FOV of the optical lens, and the maximum field angle FOV of the optical lens, an optical back focus BFL of the optical lens (a distance on the optical axis from the center of the image side surface S14 of the seventh lens L7 of the optical lens to the imaging surface IMA of the optical lens), a lens group length TL of the optical lens (a distance on the optical axis from the center of the object side surface S1 of the first lens L1 to the center of the image side surface S14 of the seventh lens L7), a focal length value F3 of the third lens L3, a focal length value F4 of the fourth lens L4, a focal length value F5 of the fifth lens L5, and a focal length value F6 of the sixth lens L6.

Watch 27

Example 10

An optical lens according to embodiment 10 of the present application is described below with reference to fig. 10. Fig. 10 is a schematic view showing a structure of an optical lens according to embodiment 10 of the present application.

As shown in fig. 10, the optical lens, in order from an object side to an image side along an optical axis, comprises: 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 seventh lens L7 is a meniscus lens with negative power, the object-side surface S13 is concave, the image-side surface S14 is convex, and both the object-side surface S13 and the image-side surface S14 of the seventh lens L7 are aspheric.

Table 28 shows a basic parameter table of the optical lens of example 10, in which the unit of the radius of curvature and the thickness/distance are both millimeters (mm).

Watch 28

The following table 29 shows the conic coefficients k and the respective high-order term coefficients A, B, C, D, E, F and G which can be used for the aspherical lens surfaces S3, S4, S8, S9, S13 and S14 in example 10.

Flour mark

k

A

B

C

D

E

F

G

S3

-0.8131259

0.000743812

-1.20766E-05

1.71706E-06

-2.01935E-07

1.23274E-08

-4.03333E-10

5.37773E-12

S4

-3.3366717

0.00017768

-1.31825E-06

2.48434E-07

-2.26358E-08

8.52758E-10

-1.89172E-11

1.65973E-13

S8

1.8848108

-0.000192119

3.68883E-05

-1.53865E-05

1.9763E-06

-1.45123E-07

5.33739E-09

-8.34292E-11

S9

-74.820187

-0.000602156

0.000102181

-1.00274E-05

6.09179E-07

-1.53782E-08

-6.21007E-10

3.00709E-11

S13

-100.21729

0.000653402

-8.76824E-05

5.88521E-06

-3.05303E-07

3.32231E-09

3.68549E-10

-1.1804E-11

S14

0.54386367

8.78913E-05

-2.83469E-05

4.35859E-06

-3.243E-07

1.04762E-08

1.73317E-11

-5.31248E-12

Watch 29

Table 30 below gives the optical length TTL of the optical lens of example 10 (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 entire group focal length value F of the optical lens, the maximum clear aperture D of the object-side surface S1 of the first lens L1 corresponding to the maximum field angle FOV of the optical lens, the image height H corresponding to the maximum field angle FOV of the optical lens, and the maximum field angle FOV of the optical lens, an optical back focus BFL of the optical lens (a distance on the optical axis from the center of the image side surface S14 of the seventh lens L7 of the optical lens to the imaging surface IMA of the optical lens), a lens group length TL of the optical lens (a distance on the optical axis from the center of the object side surface S1 of the first lens L1 to the center of the image side surface S14 of the seventh lens L7), a focal length value F3 of the third lens L3, a focal length value F4 of the fourth lens L4, a focal length value F5 of the fifth lens L5, and a focal length value F6 of the sixth lens L6.

TTL(mm)	33.9907	TL(mm)	29.2457
				F(mm)	3.8678	F3(mm)	21.5863
D(mm)	14.4684	F4(mm)	11.5347
				H(mm)	9.2274	F5(mm)	9.1675
FOV(°)	140	F6(mm)	-12.2828
				BFL(mm)	4.7449

Watch 30

In summary, examples 1 to 10 each satisfy the relationship shown in table 31.

Watch 31

The present application also provides an electronic device that may include the optical lens according to the above-described embodiments 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 range finding camera or may be an imaging module integrated on a device such as a range finding device. Furthermore, the electronic device may also be a stand-alone imaging device such as a vehicle-mounted camera, or may be an imaging module integrated on a driving assistance system such as a car.

The above description is only a preferred embodiment of the application and is illustrative of the principles of the technology employed. It will be appreciated by a person skilled in the art that the scope of the invention as referred to in the present application is not limited to the embodiments with a specific combination of the above-mentioned features, but also covers other embodiments with any combination of the above-mentioned features or their equivalents without departing from the inventive concept. For example, the above features may be replaced with (but not limited to) features having similar functions disclosed in the present application.

Claims

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

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

a second lens with focal power, wherein the object side surface of the second lens is a concave surface, and the image side surface of the second lens is a convex surface;

a third lens having a positive optical power;

the fourth lens with positive focal power has a convex object-side surface and a convex image-side surface;

the fifth lens with positive focal power has a convex object-side surface and a convex image-side surface;

a sixth lens having a negative optical power; and

a seventh lens having an optical power,

wherein the fifth lens and the sixth lens form a cemented lens.

2. An optical lens according to claim 1, wherein the total optical length TTL of the optical lens and the entire set F of focal length values of the optical lens satisfy:

TTL/F≤10。

3. the optical lens according to claim 1, wherein the maximum field angle FOV of the optical lens, the maximum clear 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 satisfy:

D/H/FOV≤0.02。

4. an optical lens according to claim 1, characterized in that the optical back focus BFL of the optical lens and the lens group length TL of the optical lens satisfy:

BFL/TL≥0.1。

5. the optical lens according to claim 1, wherein the image height H corresponding to the whole set of focal length values F, the maximum field angle FOV and the maximum field angle of the optical lens satisfies:

50≤(FOV×F)/H≤70。

6. an optical lens as claimed in claim 1, characterized in that the focal length value F3 of the third lens and the focal length value F4 of the fourth lens satisfy:

|F3/F4|≥0.6。

7. an optical lens according to any one of claims 1 to 1, wherein the focal length value F4 of the fourth lens and the focal length value F5 of the fifth lens satisfy:

0.5≤|F4/F5|≤2.5。

8. an optical lens according to claim 1, wherein the focal length value F5 of the fifth lens and the focal length value F6 of the sixth lens satisfy:

0.5≤|F5/F6|≤3.5。

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

a first lens element having a convex object-side surface and a concave image-side surface;

a second lens element having a concave object-side surface and a convex image-side surface;

a third lens;

a fourth lens element having a convex object-side surface and a convex image-side surface;

a fifth lens element having a convex object-side surface and a convex image-side surface;

a sixth lens;

a seventh lens; and

the fifth lens and the sixth lens form a cemented lens,

the whole group of focal length values 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 satisfy that:

(H-FOV×F)/FOV×F≤-0.4。

10. an electronic apparatus characterized by comprising the optical lens according to claim 1 or 9 and an imaging element for converting an optical image formed by the optical lens into an electric signal.