CN114859503A

CN114859503A - Optical lens and electronic device

Info

Publication number: CN114859503A
Application number: CN202110154428.1A
Authority: CN
Inventors: 姚波; 章鲁栋; 王东方; 闫宏宇
Original assignee: Ningbo Sunny Automotive Optech Co Ltd
Current assignee: Ningbo Sunny Automotive Optech Co Ltd
Priority date: 2021-02-04
Filing date: 2021-02-04
Publication date: 2022-08-05

Abstract

The application discloses an optical lens and an electronic device including the same. The optical lens sequentially comprises the following components from an object side to an image side along an optical axis: the first lens with positive focal power has a convex object-side surface and a concave image-side surface; a second lens element having a negative refractive power, the object-side surface of which is concave and the image-side surface of which is concave; a third lens with positive focal power, wherein the object side surface of the third lens is a convex surface, and the image side surface of the third lens is a convex surface; a fourth lens having a positive refractive power, an object-side surface of which is convex; a fifth lens having a negative refractive power, an image-side surface of which is concave; a sixth lens having a positive refractive power, an object-side surface of which is convex; and a seventh lens having a negative refractive power, an image-side surface of which is concave.

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.

Background

With the rapid development of an automobile driving assistance system, the application of an optical lens on an automobile is more and more extensive, and the requirement of a user on the pixel of a vehicle-mounted lens is higher and higher. For safety reasons, a forward-view optical lens applied to an automobile is required to have high imaging performance, and for example, the forward-view optical lens is required to have characteristics of both miniaturization and high resolution. However, most lens manufacturers usually choose to increase the number of lenses to improve the resolution of the lens on the basis of ensuring the characteristics of the original vehicle-mounted lens, but this will seriously affect the miniaturization of the lens.

In addition, in practice, a large temperature difference may exist in an application environment of the vehicle-mounted lens (such as a high temperature environment in summer and a low temperature environment in winter), and the lens applied under such a condition mostly generates image plane deviation, so that the imaging of the lens is blurred, and normal use is affected. Most vehicle-mounted lenses in the current market cannot well ensure that the imaging can be clearly realized in high and low temperature environments. Therefore, more and more lens manufacturers are beginning to research how to make the onboard lens have stable imaging quality in high and low temperature environments.

Disclosure of Invention

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

In one embodiment, the image-side surface of the fourth lens is concave.

In one embodiment, the image-side surface of the fourth lens element is convex.

In one embodiment, the object side surface of the fifth lens is convex.

In one embodiment, the object side surface of the fifth lens is concave.

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

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

In one embodiment, the object side surface of the seventh lens is convex.

In one embodiment, the object side surface of the seventh lens is concave.

In one embodiment, the fourth lens and the fifth lens are cemented to form a cemented lens.

In one embodiment, the seventh lens has an aspherical mirror surface.

In one embodiment, a distance TTL between a center of an object side surface of the first lens element and an imaging surface of the optical lens on an optical axis and a total effective focal length F of the optical lens may satisfy: TTL/F is less than or equal to 3.

In one embodiment, a distance BFL on the optical axis from the center of the image-side surface of the seventh lens to the imaging surface of the optical lens and a distance TTL on the optical axis from the center of the object-side surface of the first lens to the imaging surface of the optical lens may satisfy: BFL/TTL is more than or equal to 0.05.

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 0.08.

In one embodiment, 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 FOV of the optical lens, and a maximum field angle of the optical lens may satisfy: TTL/H/FOV is less than or equal to 0.15.

In one embodiment, the maximum field angle FOV of the optical lens, the total effective focal length F of the optical lens, and the image height H corresponding to the maximum field angle of the optical lens may satisfy: (FOV F)/H.gtoreq.40.

In one embodiment, the F-number FNO of the optical lens and the total effective focal length F of the optical lens may satisfy: FNO/F is less than or equal to 0.15.

In one embodiment, the total effective focal length F of the optical lens, the maximum field angle FOV of the optical lens, and the image height H corresponding to the maximum field angle of the optical lens may satisfy: f multiplied by tan (FOV/2)/(H/2) is less than or equal to 1.2.

In one embodiment, the maximum field angle FOV of the optical lens, the image height H corresponding to the maximum field angle of the optical lens, the distance BFL on the optical axis from the center of the image-side surface of the seventh lens to the imaging surface of the optical lens, and the distance TTL on the optical axis from the center of the object-side surface of the first lens to the imaging surface of the optical lens may satisfy: (FOV multiplied by H)/BFL/TTL is less than or equal to 3.5.

In one embodiment, the effective focal length F4 of the fourth lens and the effective focal length 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.

In one embodiment, the effective focal length F7 of the seventh lens and the total effective focal length F of the optical lens may satisfy: the ratio of F7/F is less than or equal to 5.

In one embodiment, the radius of curvature R11 of the object-side surface of the first lens, the radius of curvature R12 of the image-side surface of the first lens, and the total effective focal length F of the optical lens may satisfy: the ratio of F/R11| + | F/R12| < 2.

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: the ratio of (R11+ R12)/(R11-R12) is less than or equal to 3.

In one embodiment, a distance d12 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 a 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 may satisfy: d12/TTL is more than or equal to 0.04.

In one embodiment, a distance d12 on the optical axis from the center of the image-side surface of the first lens to the center of the object-side surface of the second lens and a distance BFL on the optical axis from the center of the image-side surface of the seventh lens to the imaging surface of the optical lens may satisfy: (d12 xBFL)/(d 12+ BFL) is less than or equal to 2.

In one embodiment, the radius of curvature R21 of the object-side surface of the second lens and the radius of curvature R22 of the image-side surface of the second lens may satisfy: the absolute value of R21/R22 is more than or equal to 0.4 and less than or equal to 1.4.

In one embodiment, the half aperture D21 of the maximum clear aperture of the object-side surface of the second lens corresponding to the maximum field angle of the optical lens, the rise SAG21 at the half aperture of the maximum clear aperture of the object-side surface of the second lens corresponding to the maximum field angle of the optical lens, the half aperture D22 of the maximum clear aperture of the image-side surface of the second lens corresponding to the maximum field angle of the optical lens, and the rise SAG22 at the half aperture of the maximum clear aperture of the image-side surface of the second lens corresponding to the maximum field angle of the optical lens may satisfy: 0.2-0.8 of (SAG21/D21)/(SAG 22/D22).

In one embodiment, the effective focal length F1 of the first lens and the effective focal length F2 of the second lens may satisfy: the absolute value of F1/F2 is more than or equal to 1.5 and less than or equal to 3.5.

In one embodiment, the fourth lens and the fifth lens are cemented to form a cemented lens, wherein the optical lens may satisfy: dn/dm is less than or equal to 3; dn is a center thickness of a lens having a largest center thickness among the third lens, the cemented lens, the sixth lens, and the seventh lens; and dm is a center thickness of a lens having a smallest center thickness among the third lens, the cemented lens, the sixth lens, and the seventh lens.

Another aspect of 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 a positive optical power; a second lens having a negative optical power; a third lens having a positive optical power; a fourth lens having a positive optical power; a fifth lens having a negative optical power; a sixth lens having positive optical power; and a seventh lens having a negative optical power; the distance BFL from the center of the image side surface of the seventh lens element to the imaging surface of the optical lens on the optical axis and the distance TTL from the center of the object side surface of the first lens element to the imaging surface of the optical lens on the optical axis can satisfy the following conditions: BFL/TTL is more than or equal to 0.05.

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

In one embodiment, the second lens element has a concave 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 of the third lens element is convex.

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

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

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

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

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

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

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

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

In one embodiment, the seventh lens has an aspherical mirror surface.

In one embodiment, the radius of curvature R11 of the object-side surface of the first lens, the radius of curvature R12 of the image-side surface of the first lens, and the total effective focal length F of the optical lens may satisfy: the | + | F/R11| + | F/R12| < 2.

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 has the beneficial effects of miniaturization, high resolution, small CRA (cross-cut line), long back focal length, good temperature performance, low cost, high imaging quality and the like by adopting the seven lenses and 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 the embodiments when taken in conjunction with the accompanying drawings. In the drawings:

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

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

fig. 3 is a schematic structural view showing an optical lens according to embodiment 3 of the present application;

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

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

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

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

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

Detailed Description

To facilitate an understanding of the present application, the present application will now be described more fully 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 image side 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 accompanying drawings in conjunction 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 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 along the optical axis in sequence from the object side to the image side.

In an exemplary embodiment, the optical lens 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).

In an exemplary embodiment, the first lens may have a positive optical power. The first lens may have a convex-concave type. The first lens is set to be in a meniscus shape facing an object space, so that light rays can enter the rear optical lens accurately and stably, the resolution of the lens is improved, the collection of light rays with a large viewing field as much as possible is facilitated, the light rays can enter the rear optical system, and the light transmission amount of the lens is increased. In practical application, the focal power and the surface type of the first lens are set in consideration of the outdoor installation and use environment of the vehicle-mounted lens, and the first lens can be used in severe weather such as rain, snow and the like, so that water drops can slide down, and the influence on imaging can be reduced.

In an exemplary embodiment, the second lens may have a negative power. The second lens may have a concave surface type. The focal power and the surface type arrangement of the second lens are beneficial to further diverging the light, adjusting the light and reducing chromatic aberration.

In an exemplary embodiment, the third lens may have a positive optical power. The third lens may have a convex type. The arrangement of the focal power and the surface type of the third lens is favorable for converging light rays and adjusting the light rays, so that the trend of the light rays can be stably transited to the rear optical lens, and the spherical aberration introduced by the front two lenses is favorably balanced.

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

In an exemplary embodiment, the fifth lens may have a negative power. The fifth lens may have a convex concave type or a concave type.

In an exemplary embodiment, the sixth lens may have a positive optical power. The sixth lens may have a convex-concave type or a convex-convex type. The arrangement of the focal power and the surface type of the sixth lens is beneficial to smoothing the trend of light rays and improving the resolution.

In an exemplary embodiment, the seventh lens may have a negative optical power. The seventh lens may have a concave-concave type or a convex-concave type. The arrangement of the focal power and the surface type of the seventh lens is beneficial to smoothing the trend of the light rays emitted by the front lens and improving the image resolution. Preferably, the seventh lens may have an aspherical mirror surface.

In an exemplary embodiment, an optical lens according to the present application may satisfy: TTL/F is less than or equal to 3, 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 further satisfy: TTL/F is less than or equal to 2. The TTL/F is less than or equal to 3, and the miniaturization is favorably realized.

In an exemplary embodiment, an optical lens according to the present application may satisfy: and the BFL/TTL is more than or equal to 0.05, wherein the BFL is the distance from the center of the image side surface of the seventh lens to the imaging surface of the optical lens on the optical axis, and the TTL is the distance from the center of the object side surface of the first lens to the imaging surface of the optical lens on the optical axis. More specifically, BFL and TTL further satisfy: BFL/TTL is more than or equal to 0.08. Satisfy BFL/TTL and be greater than or equal to 0.05, be favorable to realizing on miniaturized basis, make back burnt BFL longer, be favorable to reducing CRA, be favorable to the equipment of module, be favorable to making lens group length (being first lens to the distance of seventh lens on the optical axis) TL shorter simultaneously, make lens group compact structure, reduce the sensitivity of lens to MTF, improve production yield, reduction in production cost.

In an exemplary embodiment, an optical lens according to the present application may satisfy: D/H/FOV is less than or equal to 0.08, wherein FOV is the maximum angle of view of the optical lens, D is the maximum clear aperture of the object side surface of the first lens corresponding to the maximum angle of view of the optical lens, and H is the image height corresponding to the maximum angle of view of the optical lens. More specifically, D, H and the FOV further satisfy: D/H/FOV is less than or equal to 0.05. The D/H/FOV is less than or equal to 0.08, the front end caliber is favorably reduced, and the miniaturization is favorably realized.

In an exemplary embodiment, an optical lens according to the present application may satisfy: TTL/H/FOV is less than or equal to 0.15, 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, FOV is the maximum angle of view of the optical lens, and H is the image height corresponding to the maximum angle of view of the optical lens. More specifically, TTL, H, and FOV further satisfy: TTL/H/FOV is less than or equal to 0.12. The TTL/H/FOV is less than or equal to 0.15, and the miniaturization is favorably realized.

In an exemplary embodiment, an optical lens according to the present application may satisfy: (FOV multiplied by F)/H is more than or equal to 40, wherein FOV is the maximum angle of view of the optical lens, F is the total effective focal length of the optical lens, and H is the image height corresponding to the maximum angle of view of the optical lens. More specifically, FOV, F and H further satisfy: (FOV F)/H.gtoreq.45. The (FOV multiplied by F)/H is more than or equal to 40, which is beneficial to ensuring that the lens simultaneously satisfies the characteristics of long focus, large field angle and the like.

In an exemplary embodiment, an optical lens according to the present application may satisfy: FNO/F is less than or equal to 0.15, wherein FNO is the F-number of the optical lens, and F is the total effective focal length of the optical lens. More specifically, FNO and F further may satisfy: FNO/F is not less than 0.08 and not more than 0.12. The FNO/F is less than or equal to 0.15, and the lens has the characteristics of large aperture, long focal length and the like.

In an exemplary embodiment, an optical lens according to the present application may satisfy: f multiplied by tan (FOV/2)/(H/2) is less than or equal to 1.2, wherein F is the total effective focal length of the optical lens, FOV is the maximum angle of view of the optical lens, and H is the image height corresponding to the maximum angle of view of the optical lens. More specifically, F, FOV and H further satisfy: f multiplied by tan (FOV/2)/(H/2) is more than or equal to 0.7 and less than or equal to 1.1. The condition that F multiplied by tan (FOV/2)/(H/2) is less than or equal to 1.2 is met, and the lens distortion is favorably reduced.

In an exemplary embodiment, an optical lens according to the present application may satisfy: (FOV multiplied by H)/BFL/TTL is less than or equal to 3.5, wherein FOV is the maximum field angle of the optical lens, H is the image height corresponding to the maximum field angle of the optical lens, 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, FOV, H, BFL and TTL may further satisfy: (FOV multiplied by H)/BFL/TTL is less than or equal to 3.2. The requirement (FOV multiplied by H)/BFL/TTL is less than or equal to 3.5, and the small CRA is provided under the large chip matched with the lens under the condition that the angle of view and the imaging surface of the lens are ensured to be fixed.

In an exemplary embodiment, an optical lens according to the present application may satisfy: and | F4/F5| is less than or equal to 0.5 and less than or equal to 2, wherein F4 is the effective focal length of the fourth lens, and F5 is the effective focal length of the fifth lens. More specifically, F4 and F5 further satisfy: the absolute value of F4/F5 is more than or equal to 1 and less than or equal to 2. The condition that the absolute value of F4/F5 is less than or equal to 2 is met, light is smoothly transited, and chromatic aberration is corrected.

In an exemplary embodiment, an optical lens according to the present application may satisfy: and | F7/F | ≦ 5, wherein F7 is the effective focal length of the seventh lens, and F is the total effective focal length of the optical lens. More specifically, F7 and F further satisfy: the ratio of F7/F is less than or equal to 4. Satisfies | F7/F | less than or equal to 5, and is beneficial to improving resolution.

In an exemplary embodiment, an optical lens according to the present application may satisfy: the ratio of | F/R11| + | F/R12| ≦ 2, wherein R11 is the curvature radius of the object-side surface of the first lens, R12 is the curvature radius of the image-side surface of the first lens, and F is the total effective focal length of the optical lens. More specifically, F, R11 and R12 further satisfy: the | + | F/R11| + | F/R12| < 1.2. Satisfying | F/R11| + | F/R12| < 2, facilitating the incident light of object entering the optical lens, and effectively correcting astigmatism to improve the imaging quality.

In an exemplary embodiment, an optical lens according to the present application may satisfy: -3 ≦ (R11+ R12)/(R11-R12) ≦ 3, where R11 is the radius of curvature of the object-side surface of the first lens and R12 is the radius of curvature of the image-side surface of the first lens. More specifically, R11 and R12 may further satisfy: the ratio of (R11+ R12)/(R11-R12) is more than or equal to-2 and less than or equal to 2. Satisfying-3 ≦ (R11+ R12)/(R11-R12) ≦ 3, can correct aberration of the optical lens, and can ensure that when the light emitted from the first lens enters the object side of the second lens, the incident light is gentle, thereby being beneficial to reducing tolerance sensitivity of the optical lens.

In an exemplary embodiment, an optical lens according to the present application may satisfy: d12/TTL is more than or equal to 0.04, wherein d12 is the distance on the optical axis from the center of the image side surface of the first lens to the center of the object side surface of the second lens, and TTL is the distance on the optical axis from the center of the object side surface of the first lens to the imaging surface of the optical lens. More specifically, d12 and TTL further satisfy: d12/TTL is more than or equal to 0.1. The d12/TTL is more than or equal to 0.04, so that the light can be smoothly transited, and the image quality can be improved.

In an exemplary embodiment, an optical lens according to the present application may satisfy: (d12 xBFL)/(d 12+ BFL) ≦ 2, where d12 is the distance on the optical axis from the center of the image-side surface of the first lens to the center of the object-side surface of the second lens, and BFL is the distance on the optical axis from the center of the image-side surface of the seventh lens to the imaging surface of the optical lens. More specifically, d12 and BFL may further satisfy: (d12 xBFL)/(d 12+ BFL) is less than or equal to 1.8. Satisfying (d12 xBFL)/(d 12+ BFL) ≦ 2, helping to balance the proportion of back focus BFL and the distance d12 between the first lens and the second lens, being beneficial to increasing the assembly yield, and being helpful to making the optical lens have a back focus BFL long enough to place other optical elements so as to increase the design flexibility.

In an exemplary embodiment, an optical lens according to the present application may satisfy: 0.4 ≦ R21/R22 ≦ 1.4, where R21 is the radius of curvature of the object-side surface of the second lens and R22 is the radius of curvature of the image-side surface of the second lens. More specifically, R21 and R22 may further satisfy: the absolute value of R21/R22 is more than or equal to 1.4. The requirement that the absolute value of R21/R22 is less than or equal to 0.4 is less than or equal to 1.4, the second lens is favorable for collecting more light rays, and the light transmission capacity of the lens is favorably increased.

In an exemplary embodiment, an optical lens according to the present application may satisfy: 0.2 ≦ (SAG21/D21)/(SAG22/D22) ≦ 0.8, wherein D21 is a half aperture of a maximum clear aperture of an object-side surface of the second lens corresponding to the maximum field angle of the optical lens, SAG21 is a rise at the half aperture of the maximum clear aperture of the object-side surface of the second lens corresponding to the maximum field angle of the optical lens, D22 is a half aperture of the maximum clear aperture of an image-side surface of the second lens corresponding to the maximum field angle of the optical lens, and SAG22 is a rise at the half aperture of the maximum clear aperture of the image-side surface of the second lens corresponding to the maximum field angle of the optical lens. For example, SAG21 is the distance on the optical axis from the intersection of the object-side surface of the second lens and the optical axis to the maximum clear aperture of the object-side surface of the second lens. More specifically, SAG21, D21, SAG22, and D22 may further satisfy: 0.6-0.8 of (SAG21/D21)/(SAG 22/D22). The requirement of 0.2-0.8 of (SAG21/D21)/(SAG22/D22) is favorable for the smooth transition of peripheral light rays of the second lens and the reduction of the sensitivity of the lens.

In an exemplary embodiment, an optical lens according to the present application may satisfy: and | F1/F2| ≦ 3.5 of 1.5 ≦ wherein F1 is the effective focal length of the first lens and F2 is the effective focal length of the second lens. More specifically, F1 and F2 may further satisfy: the absolute value of F1/F2 is more than or equal to 2 and less than or equal to 3. The requirement that the absolute value of F1/F2 is less than or equal to 1.5 is met, light can be smoothly transited, and image quality can be improved.

In an exemplary embodiment, the fourth lens and the fifth lens are cemented to form a cemented lens, and an optical lens according to the present application may satisfy: dn/dm ≦ 3, where dn is a center thickness of a lens having a largest center thickness among the third lens, the cemented lens, the sixth lens, and the seventh lens, and dm is a center thickness of a lens having a smallest center thickness among the third lens, the cemented lens, the sixth lens, and the seventh lens. More specifically, dn and dm further satisfy: dn/dm is less than or equal to 2.7. The requirement that dn/dm is less than or equal to 3 is met, the optimization of parameters of each lens in the optical lens is facilitated, the center thickness of each lens is uniform, the action of each lens is stable, the change of light rays entering the optical lens at high and low temperatures is further facilitated to be controlled, and the optical lens has better temperature performance.

In an exemplary embodiment, an optical lens according to the present application may satisfy: nd1 ≧ 1.77, where Nd1 is the refractive index of the first lens. The Nd1 is more than or equal to 1.77, the front end caliber is reduced, and the imaging quality is improved.

In an exemplary embodiment, a stop for limiting the light beam may be disposed between the first lens and the second lens to further improve the imaging quality of the optical lens. The diaphragm is arranged between the first lens and the second lens, so that light rays entering the optical lens can be effectively converged, and the aperture of the lens is reduced. In the embodiment of the present application, the stop may be disposed in the vicinity of the image side surface of the first lens or in the vicinity of the object side surface of the second lens. 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.

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

As known to those skilled in the art, cemented lenses can be used to minimize or eliminate chromatic aberration. The cemented lens used 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 process in the lens manufacturing process.

In an exemplary embodiment, the fourth lens and the fifth lens may be cemented to form a cemented lens. The fourth lens with positive focal power, the convex object side surface and the concave image side surface is cemented with the fifth lens with negative focal power, the convex object side surface and the concave image side surface, or the fourth lens with positive focal power, the convex object side surface and the convex image side surface is cemented with the fifth lens with negative focal power, the concave object side surface and the concave image side surface, light rays emitted by the front lens can be smoothly transited to the imaging surface of the optical lens, the optical lens is compact in structure, the size of the optical lens is reduced, various aberrations of the optical lens are corrected, the matching sensitivity of the lenses is reduced, the resolution is improved, the distortion and the CRA are optimized. Of course, the fourth lens and the fifth lens may not be cemented, which is advantageous for improving the resolution.

The gluing mode adopted between the lenses has at least one of the following advantages: self color difference is reduced, tolerance sensitivity is reduced, and the integral color difference of the system is balanced through the residual partial color difference; reducing the separation distance between the two lenses, thereby reducing the overall length of the system; the assembling parts between the lenses are reduced, so that the working procedures are reduced, and the cost is reduced; the tolerance sensitivity problems of inclination/core deviation and the like generated in the assembling process of the lens unit are reduced, and the production yield is improved; the light quantity loss caused by reflection among the lenses is reduced, and the illumination is improved; the field curvature can be further reduced and the off-axis point aberration of the system can be corrected. The gluing design shares the whole chromatic aberration correction of the system, effectively corrects the aberration so as to improve the resolving power, and enables the optical system to be compact as a whole and meet the miniaturization requirement.

In an exemplary embodiment, the first lens, the second lens, the third lens, the fourth lens, the fifth lens, and the sixth lens may be spherical lenses; the seventh lens may be an aspherical lens. The specific number of the spherical lenses and the aspherical lenses is not particularly limited, and the number of the aspherical lenses can be increased when the imaging quality is mainly embodied. 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 all be aspheric lenses. The aspheric 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 better curvature radius characteristics, and has advantages of improving distortion aberration and improving astigmatic aberration. After the aspheric lens is adopted, the aberration generated in imaging can be eliminated as much as possible, so that the imaging quality of the lens is improved. The aspheric lens helps to correct system aberration and improve resolving power.

According to the optical lens of the above embodiment of the present application, through reasonable setting of the shapes and focal powers of the respective lenses, under the condition that only 7 lenses are used, at least one of the advantages of high resolution (up to five million pixels or more), miniaturization, good temperature performance, long back focus, small CRA, low cost, good imaging quality and the like of the optical lens is achieved. The optical lens meets the requirement of high resolution, and is favorable for realizing the characteristics of small volume, low sensitivity, high production yield, convenience in installation and the like. The CRA of the optical lens is small, stray light generated by light rays and the lens barrel when the light rays are emitted from the rear end of the lens can be effectively avoided, the lens can be well matched with a vehicle-mounted chip due to the small CRA, phenomena such as color cast and dark corners are avoided, and the lens can be further well matched with a chip with a large size. Meanwhile, the optical lens also has better temperature performance, is favorable for the optical lens to have small change of imaging effect in high and low temperature environments, has stable image quality, and can be used in most environments.

According to the optical lens of the embodiment of the application, the cemented lens is arranged to share the whole chromatic aberration correction of the system, so that the system aberration can be corrected, the system resolution quality can be improved, the problem of matching sensitivity can be reduced, the whole structure of the optical system can be compact, and the miniaturization requirement can be met.

In an exemplary embodiment, the first lens, the second lens, the third lens, the fourth lens, the fifth lens, the sixth lens, and the seventh lens may all be glass lenses. The optical lens made of glass can inhibit the deviation of the back focus of the optical lens along with the temperature change so as to improve the stability of the system. Meanwhile, the glass material is adopted, so that the imaging blur of the lens caused by high and low temperature changes in the use environment can be avoided, and the normal use of the lens is influenced. Specifically, when the importance is paid to the resolution quality and the reliability, the first lens to the seventh lens may be all glass aspherical lenses. Of course, in the application where the requirement of temperature stability is low, the first lens to the seventh lens in the optical lens can also be made of plastic. The optical lens is made of plastic, so that the manufacturing cost can be effectively reduced. Of course, the first to seventh lenses in the optical lens may also be made of plastic and glass in combination.

However, it will be appreciated by those skilled in the art that the number of lenses constituting the lens barrel may be varied to achieve the various results and advantages described in the present specification without departing from the claimed subject matter. 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 shows a schematic structural diagram of an optical lens according to embodiment 1 of the present application.

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

The first lens element L1 is a convex-concave lens element with positive refractive power, and has a convex object-side surface S1 and a concave image-side surface S2. The second lens L2 is a biconcave lens with negative power, and has a concave object-side surface S4 and a concave image-side surface S5. The third lens element L3 is a biconvex lens element with positive refractive power, and has a convex object-side surface S6 and a convex image-side surface S7. The fourth lens L4 is a convex-concave lens with positive power, and has a convex object-side surface S8 and a concave image-side surface S9. The fifth lens L5 is a convex-concave lens with negative power, and has a convex object-side surface S9 and a concave image-side surface S10. The sixth lens element L6 is a convex-concave lens element with positive refractive power, and has a convex object-side surface S11 and a concave image-side surface S12. The seventh lens L7 is a biconcave lens with negative power, and has a concave object-side surface S13 and a concave image-side surface S14. The fourth lens L4 and the fifth lens L5 may be cemented to constitute a cemented lens.

The optical lens may further include a stop STO, which may be disposed between the first lens L1 and the second lens L2 to improve image quality. For example, the stop STO may be disposed between the first lens L1 and the second lens L2 at a position close to the image side surface S2 of the first lens L1.

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. The filter L8 and/or the protective glass L8' may be used to correct color deviation and/or protect the image sensing chip IMA located at the imaging plane. The light from the object passes through the respective surfaces S1 to S16 in order and is finally imaged on the imaging plane.

Table 1 shows a radius of curvature R, a thickness/distance d (it is understood that the thickness/distance d of the row in which S1 is located is the center thickness d1 of the first lens L1, the thickness/distance d of the row in which S2 is located is the separation distance d12 between the first lens L1 and the second lens L2, and so on), a refractive index Nd, and an abbe number Vd of each lens of the optical lens of example 1.

TABLE 1

In embodiment 1, both the object-side surface S13 and the image-side surface S14 of the seventh lens L7 may be aspheric, and the surface shape x of each aspheric lens may be defined using, but not limited to, the following aspheric formula:

wherein x is the rise of the distance from the aspheric surface vertex to the aspheric surface vertex 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 radius of curvature R in table 1 above); k is a conic coefficient; ai is the correction coefficient of the i-th order of the aspherical surface. Table 2 below gives the cone coefficients k and the high-order term coefficients A4, A6, A8, A10, A12, A14 and A16 which can be used for the respective aspherical mirror surfaces S13 and S14 in example 1.

Flour mark

k

A4

A6

A8

A10

A12

A14

A16

S13

-64.9447

-1.6276E-03

-2.3117E-05

1.9354E-06

-2.7569E-07

1.9261E-08

-5.3907E-10

4.51E-12

S14

26.2752

-2.5183E-04

-7.3422E-05

6.8883E-06

-4.0099E-07

1.6159E-08

-3.6110E-10

2.94E-12

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 parts similar to those of embodiment 1 will be omitted for the sake of brevity. Fig. 2 shows a schematic structural diagram of an optical lens according to embodiment 2 of the present application.

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

Table 3 shows the radius of curvature R, thickness/distance d, refractive index Nd, and abbe number Vd of each lens of the optical lens of example 2. Table 4 shows conic coefficients and high-order term coefficients that can be used for each aspherical mirror surface in example 2, wherein each aspherical mirror surface type can be defined by formula (1) given in example 1 above.

TABLE 3

Flour mark

k

A4

A6

A8

A10

A12

A14

A16

S13

-66.6854

-1.6282E-03

-2.3465E-05

1.9162E-06

-2.7665E-07

1.9208E-08

-5.4282E-10

4.16E-12

S14

24.3101

-2.6514E-04

-7.3840E-05

6.8709E-06

-4.0177E-07

1.6125E-08

-3.6259E-10

2.88E-12

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 diagram of an optical lens according to embodiment 3 of the present application.

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

The first lens element L1 is a convex-concave lens element with positive refractive power, and has a convex object-side surface S1 and a concave image-side surface S2. The second lens L2 is a biconcave lens with negative power, and has a concave object-side surface S4 and a concave image-side surface S5. The third lens element L3 is a biconvex lens element with positive refractive power, and has a convex object-side surface S6 and a convex image-side surface S7. The fourth lens element L4 is a biconvex lens element with positive power, and has a convex object-side surface S8 and a convex image-side surface S9. The fifth lens L5 is a biconcave lens with negative power, and has a concave object-side surface S9 and a concave image-side surface S10. The sixth lens element L6 is a convex-concave lens element with positive refractive power, and has a convex object-side surface S11 and a concave image-side surface S12. The seventh lens element L7 is a convex-concave lens element with negative power, and has a convex object-side surface S13 and a concave image-side surface S14. The fourth lens L4 and the fifth lens L5 may be cemented to constitute a cemented lens.

Table 5 shows the radius of curvature R, thickness/distance d, refractive index Nd, and abbe number Vd of each lens of the optical lens of example 3. Table 6 shows conic coefficients and high-order term coefficients that can be used for each aspherical mirror surface in example 3, wherein each aspherical mirror surface type can be defined by formula (1) given in example 1 above.

TABLE 5

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 diagram of an optical lens according to embodiment 4 of the present application.

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

Table 7 shows the radius of curvature R, thickness/distance d, refractive index Nd, and abbe number Vd of each lens of the optical lens of example 4. Table 8 shows conic coefficients and high-order term coefficients that can be used for each aspherical mirror surface in example 4, wherein each aspherical mirror surface type can be defined by formula (1) given in example 1 above.

TABLE 7

Flour mark

k

A4

A6

A8

A10

A12

A14

A16

S13

87.9087

-1.8294E-03

-3.3759E-05

2.0857E-06

-2.6880E-07

1.8444E-08

-6.0777E-10

8.37E-12

S14

-34.9962

-4.5022E-04

-8.2614E-05

6.6219E-06

-4.0460E-07

1.6233E-08

-3.5379E-10

3.21E-12

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 diagram of an optical lens according to embodiment 5 of the present application.

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

The first lens element L1 is a convex-concave lens element with positive refractive power, and has a convex object-side surface S1 and a concave image-side surface S2. The second lens L2 is a biconcave lens with negative power, and has a concave object-side surface S4 and a concave image-side surface S5. The third lens element L3 is a biconvex lens element with positive refractive power, and has a convex object-side surface S6 and a convex image-side surface S7. The fourth lens L4 is a convex-concave lens with positive power, and has a convex object-side surface S8 and a concave image-side surface S9. The fifth lens L5 is a convex-concave lens with negative power, and has a convex object-side surface S9 and a concave image-side surface S10. The sixth lens element L6 is a biconvex lens element with positive refractive power, and has a convex object-side surface S11 and a convex image-side surface S12. The seventh lens L7 is a biconcave lens with negative power, and has a concave object-side surface S13 and a concave image-side surface S14. The fourth lens L4 and the fifth lens L5 may be cemented to constitute a cemented lens.

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

Table 9 shows the radius of curvature R, thickness/distance d, refractive index Nd, and abbe number Vd of each lens of the optical lens of example 5. Table 10 shows conic coefficients and high-order term coefficients that can be used for each aspherical mirror surface in example 5, wherein each aspherical mirror surface type can be defined by formula (1) given in example 1 above.

TABLE 9

Flour mark

k

A4

A6

A8

A10

A12

A14

A16

S13

-118.3461

-1.2418E-03

-1.1579E-06

2.8659E-06

-2.7914E-07

1.6184E-08

-6.6191E-10

1.25E-11

S14

-6.3230

8.0507E-04

-4.9350E-05

7.0570E-06

-4.0536E-07

1.6068E-08

-3.4893E-10

3.94E-12

Watch 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 assembly includes, in order from an object side to an image side along an optical axis, a first lens element L1, a second lens element L2, a third lens element L3, a fourth lens element L4, a fifth lens element L5, a sixth lens element L6 and a seventh lens element L7.

Table 11 shows the radius of curvature R, thickness/distance d, refractive index Nd, and abbe number Vd of each lens of the optical lens of example 6. Table 12 shows conic coefficients and high-order term coefficients that can be used for each aspherical mirror surface in example 6, wherein each aspherical mirror surface type can be defined by formula (1) given in example 1 above.

TABLE 11

Flour mark

k

A4

A6

A8

A10

A12

A14

A16

S13

-120.6792

-1.2333E-03

-6.9857E-07

2.8780E-06

-2.8023E-07

1.6000E-08

-6.6961E-10

1.33E-11

S14

-4.8377

8.4735E-04

-4.7977E-05

7.1025E-06

-4.0399E-07

1.6100E-08

-3.4870E-10

3.91E-12

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 assembly includes, in order from an object side to an image side along an optical axis, a first lens element L1, a second lens element L2, a third lens element L3, a fourth lens element L4, a fifth lens element L5, a sixth lens element L6 and a seventh lens element L7.

The first lens element L1 is a convex-concave lens element with positive refractive power, and has a convex object-side surface S1 and a concave image-side surface S2. The second lens L2 is a biconcave lens with negative power, and has a concave object-side surface S4 and a concave image-side surface S5. The third lens element L3 is a biconvex lens element with positive refractive power, and has a convex object-side surface S6 and a convex image-side surface S7. The fourth lens element L4 is a biconvex lens with positive power, and has a convex object-side surface S8 and a convex image-side surface S9. The fifth lens L5 is a biconcave lens with negative power, and has a concave object-side surface S9 and a concave image-side surface S10. The sixth lens element L6 is a biconvex lens element with positive refractive power, and has a convex object-side surface S11 and a convex image-side surface S12. The seventh lens L7 is a biconcave lens with negative power, and has a concave object-side surface S13 and a concave image-side surface S14. The fourth lens L4 and the fifth lens L5 may be cemented to constitute 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. The filter L8 and/or the protective glass L8' may be used to correct color deviation and/or protect the image sensing chip IMA located at the image plane. The light from the object passes through the respective surfaces S1 to S16 in order and is finally imaged on the imaging plane.

Table 13 shows the radius of curvature R, thickness/distance d, refractive index Nd, and abbe number Vd of each lens of the optical lens of example 7. Table 14 shows conic coefficients and high-order term coefficients that can be used for each aspherical mirror surface in example 7, wherein each aspherical mirror surface type can be defined by formula (1) given in example 1 above.

Watch 13

Flour mark

k

A4

A6

A8

A10

A12

A14

A16

S13

200.0000

-1.3983E-03

-5.4892E-06

2.8221E-06

-2.7432E-07

1.6824E-08

-5.7338E-10

8.88E-12

S14

-8.8439

7.1272E-04

-5.1343E-05

7.1968E-06

-3.9088E-07

1.6597E-08

-3.4538E-10

5.36E-12

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 diagram of an optical lens according to embodiment 8 of the present application.

As shown in fig. 8, the optical lens assembly includes, in order from an object side to an image side along an optical axis, a first lens element L1, a second lens element L2, a third lens element L3, a fourth lens element L4, a fifth lens element L5, a sixth lens element L6 and a seventh lens element L7.

The first lens element L1 is a convex-concave lens element with positive refractive power, and has a convex object-side surface S1 and a concave image-side surface S2. The second lens L2 is a biconcave lens with negative power, and has a concave object-side surface S4 and a concave image-side surface S5. The third lens element L3 is a biconvex lens element with positive refractive power, and has a convex object-side surface S6 and a convex image-side surface S7. The fourth lens element L4 is a biconvex lens element with positive power, and has a convex object-side surface S8 and a convex image-side surface S9. The fifth lens L5 is a biconcave lens with negative power, and has a concave object-side surface S9 and a concave image-side surface S10. The sixth lens element L6 is a biconvex lens with positive power, and has a convex object-side surface S11 and a convex image-side surface S12. The seventh lens L7 is a biconcave lens with negative power, and has a concave object-side surface S13 and a concave image-side surface S14. The fourth lens L4 and the fifth lens L5 may be cemented to constitute a cemented lens.

The optical lens may further include a stop STO, which may be disposed between the first lens L1 and the second lens L2 to improve imaging quality. For example, the stop STO may be disposed between the first lens L1 and the second lens L2 at a position close to the image side surface S2 of the first lens L1.

Table 15 shows the radius of curvature R, thickness/distance d, refractive index Nd, and abbe number Vd of each lens of the optical lens of example 8. Table 16 shows conic coefficients and high-order term coefficients that can be used for each aspherical mirror surface in example 8, wherein each aspherical mirror surface type can be defined by formula (1) given in example 1 above.

Watch 15

Flour mark

k

A4

A6

A8

A10

A12

A14

A16

S13

189.0000

-1.3795E-03

-4.6483E-06

2.8081E-06

-2.8073E-07

1.6227E-08

-5.8964E-10

1.09E-11

S14

-5.8187

8.2033E-04

-4.8564E-05

7.2551E-06

-3.9133E-07

1.6412E-08

-3.6325E-10

3.95E-12

TABLE 16

In summary, examples 1 to 8 satisfy the relationships shown in the following tables 17-1 and 17-2, respectively. In tables 17-1 and 17-2, units of TTL, F, BFL, D, H, F1, F2, F4, F5, F7, R11, R12, R21, R22, D12, dn, dm, D21, D22, SAG21, SAG22 are millimeters (mm), and units of FOV are degrees (°).

TABLE 17-1

TABLE 17-2

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

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

a second lens element having a negative refractive power, the object-side surface of which is concave and the image-side surface of which is concave;

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

a fourth lens having a positive refractive power, an object-side surface of which is convex;

a fifth lens having a negative refractive power, an image-side surface of which is concave;

a sixth lens having a positive refractive power, an object-side surface of which is convex; and

and the image side surface of the seventh lens with negative focal power is a concave surface.

2. An optical lens barrel according to claim 1, wherein the image side surface of the fourth lens is concave.

3. An optical lens barrel according to claim 1, wherein the image side surface of the fourth lens element is convex.

4. An optical lens barrel according to claim 1, wherein the object side surface of the fifth lens element is convex.

5. An optical lens barrel according to claim 1, wherein the object side surface of the fifth lens is concave.

6. An optical lens barrel according to claim 1, wherein the image side surface of the sixth lens element is concave.

7. An optical lens barrel according to claim 1, wherein the image side surface of the sixth lens element is convex.

8. An optical lens barrel according to claim 1, wherein the object side surface of the seventh lens element is convex.

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

a first lens having a positive optical power;

a second lens having a negative optical power;

a third lens having a positive optical power;

a fourth lens having a positive optical power;

a fifth lens having a negative optical power;

a sixth lens having positive optical power; and

a seventh lens having a negative optical power;

a distance BFL on the optical axis from a center of an image-side surface of the seventh lens element to an imaging surface of the optical lens and a distance TTL on the optical axis from a center of an object-side surface of the first lens element to the imaging surface of the optical lens satisfy: BFL/TTL is more than or equal to 0.05.

10. An electronic apparatus, characterized by comprising the optical lens according to any one of claims 1 to 9 and an imaging element for converting an optical image formed by the optical lens into an electric signal.