CN114509857A

CN114509857A - Optical lens and electronic device

Info

Publication number: CN114509857A
Application number: CN202011278699.XA
Authority: CN
Inventors: 赵哲; 王东方; 姚波
Original assignee: Ningbo Sunny Automotive Optech Co Ltd
Current assignee: Ningbo Sunny Automotive Optech Co Ltd
Priority date: 2020-11-16
Filing date: 2020-11-16
Publication date: 2022-05-17
Anticipated expiration: 2040-11-16
Also published as: CN114509857B

Abstract

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

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

In recent years, with the rapid development of the automatic driving technology, the vehicle-mounted lens is used as a visual system for the automatic driving vehicle to acquire external information, and plays an irreplaceable role in the automatic driving vehicle. In order to obtain information more accurately, the autopilot system needs to be matched with a chip with a larger size and a higher resolution, and therefore, the optical lens is used as a visual system for obtaining external information by the autopilot system and needs to have higher resolving power.

In the current market, in order to improve the resolution quality of the existing vehicle-mounted lens, most lens manufacturers generally adopt a mode of increasing the number of lenses to improve the imaging capacity of the lens, but the cost is increased to a certain extent, and meanwhile, the miniaturization characteristic of the lens is also seriously influenced. In particular, a lens used in an autonomous vehicle is also required to have high imaging stability to adapt to various severe environments, so as to avoid the risk of significant degradation of the imaging performance of the lens due to large temperature differences. In view of safety, a lens that can only simply identify an obstacle cannot meet the requirement of automatically driving a vehicle, and such a lens needs to be capable of clearly identifying surrounding objects and restoring the color of the environment, such as the color of a traffic light.

Disclosure of Invention

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

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

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

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

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

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

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

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 concave object-side surface and a convex 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 image side surface of the fifth lens is concave.

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

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

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

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

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

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

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

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

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

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

In one embodiment, the second lens and the seventh lens have aspherical mirror surfaces.

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 4.

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 0.3.

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 0.3.

In one embodiment, the numerical aperture 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 0.5.

In one embodiment, the tangent value θ of the maximum field angle 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: the ratio of (H-F multiplied by theta)/(F multiplied by theta) is more than or equal to 0.01 and less than or equal to 0.2.

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 total effective focal length F of the optical lens and the radius of curvature R1 of the object side surface of the first lens can satisfy: the | F/R1| is less than or equal to 3.

In one embodiment, the radius of curvature of the object-side surface of the first lens, R1, the radius of curvature of the image-side surface of the first lens, R2, and the center thickness of the first lens, T1, may satisfy: R1/(R2+ T1) is less than or equal to 2.

In one embodiment, the refractive index Nd3 of the third lens and the abbe number Ab3 of the third lens may satisfy: ab3/Nd3 is more than or equal to 50.

In one embodiment, the effective focal length F3 of the third lens and the temperature coefficient of refraction dn3/dt3 of the third lens satisfy: -2X 10⁶≤F3/(dn3/dt3)≤-5×10⁵。

In one embodiment, the effective focal length F3 of the third lens and the effective focal length F4 of the fourth lens may satisfy: F3/F4 is less than or equal to 4.

In one embodiment, a center thickness Tn of an nth lens having a largest center thickness among the third, fourth, and fifth lenses and a center thickness Tm of an mth lens having a smallest center thickness among the third, fourth, and fifth lenses may satisfy: Tn/Tm is less than or equal to 3, wherein n and m are selected from 3, 4 and 5.

In one embodiment, the radius of curvature R7 of the image-side surface of the third lens and the radius of curvature R8 of the object-side surface of the fourth lens may satisfy: the ratio of R7 to R8 is less than or equal to 5.

In one embodiment, the radius of curvature R9 of the image-side surface of the fourth lens and the radius of curvature R10 of the object-side surface of the fifth lens may satisfy: the ratio of R9 to R10 is less than or equal to 5.

In one embodiment, the optical lens further includes a stop, and a distance L from the stop to an imaging surface of the optical lens on an optical axis, a distance TTL from a center of an object-side surface of the first lens to the imaging surface of the optical lens on the optical axis, a maximum field angle FOV of the optical lens, and an image height H corresponding to the maximum field angle of the optical lens may satisfy: FOV multiplied by H/L/TTL is less than or equal to 0.8.

In one embodiment, the central thickness T2 of the second lens and the distance TTL between the center of the object-side surface of the first lens and the imaging surface of the optical lens on the optical axis may satisfy: T2/TTL is less than or equal to 0.12.

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 an 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 positive optical power; a sixth lens having a negative optical power; and a seventh lens having a power. 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 can satisfy the following conditions: (FOV F)/H.gtoreq.40.

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 third lens element has a concave 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 convex object-side surface and a convex image-side surface.

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

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

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

In one embodiment, the tangent value θ of the maximum field angle 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: the | (H-Fxtheta)/(Fxtheta) is not less than 0.01 and not more than 0.2.

In one embodiment, the radius of curvature R1 of the object-side surface of the first lens, the radius of curvature R2 of the image-side surface of the first lens, and the center thickness T1 of the first lens may satisfy: R1/(R2+ T1) is less than or equal to 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 six lenses are adopted, and the shape, focal power and the like of each lens are optimally set, so that the optical lens has at least one beneficial effect of miniaturization, good chromatic aberration, low cost, high resolution and the like.

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 structural view showing an optical lens according to embodiment 6 of the present application;

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

fig. 8 is a schematic structural view 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 is a schematic view showing a structure of an optical lens according to embodiment 10 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 embodiments with reference to the attached drawings.

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 power or a negative power. The first lens may have a convex-concave type or a concave-convex type. The focal power and the surface shape of the first lens can enable light rays to enter the rear optical lens correctly and stably, improve the resolution, enable the optical lens to collect light rays with a large visual field as much as possible, enable the light rays to enter a rear optical system and increase the light transmission quantity. The shape of first lens can set up to being close the concentric circles for peripheral light has the optical path difference with central light, disperses central light, gets into rear optical lens, is favorable to reducing the camera lens front end bore, reduces the volume, is favorable to realizing the miniaturization, reduce cost.

In an exemplary embodiment, the second lens may have a negative power. The second lens may have a concave-convex type or a convex-concave type. The focal power and the surface shape of the second lens can enable light rays to enter the rear optical lens correctly and stably, improve resolution, enable the optical lens to collect light rays with a large visual field as far as possible, enable the light rays to enter a rear optical system and increase the light transmission quantity. Preferably, the second lens may have an aspherical mirror surface to further improve the resolution quality.

In an exemplary embodiment, the third lens may have a positive optical power. The third lens may have a convex type or a concave-convex type. The arrangement of the focal power and the surface type of the third lens is beneficial to converging light rays and adjusting the light rays so that the trend of the light rays is stably transited to a rear optical lens; the spherical aberration generated by the front lens can be balanced.

In an exemplary embodiment, the fourth lens may have a positive optical power. The fourth lens may have a convex-concave type, a concave-convex type, or a convex-convex type. The arrangement of the focal power and the surface type of the fourth lens is beneficial to converging light rays and adjusting the light rays so that the trend of the light rays is stably transited to a rear optical lens; the spherical aberration generated by the front lens can be balanced.

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

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

In exemplary embodiments, the seventh lens may have a positive power or a negative power. The seventh lens may have a convex-concave type, a concave-convex type, a convex-convex type, or a concave-concave type. The optical power and the surface type of the seventh lens can smoothly transit the light rays emitted by the front lens to an imaging surface, reduce the total length of the lens, correct astigmatism and curvature of field and improve resolution. Preferably, the seventh lens may have an aspherical mirror surface to further improve the resolution quality.

In an exemplary embodiment, an optical lens according to the present application may satisfy: TTL/F is less than or equal to 4, 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 3. The TTL/F is less than or equal to 4, the total length of the lens can be effectively limited, and the miniaturization of the lens is facilitated.

In an exemplary embodiment, an optical lens according to the present application may satisfy: D/H/FOV is less than or equal to 0.3, wherein FOV is the maximum field angle of the optical lens, D is the maximum clear aperture of the object side surface of the first lens corresponding to the maximum field angle of the optical lens, and H is the image height corresponding to the maximum field angle of the optical lens. More specifically, D, H and the FOV further satisfy: D/H/FOV is less than or equal to 0.1. The D/H/FOV is less than or equal to 0.3, the aperture of the front end is favorably reduced, and the miniaturization of the lens 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 0.3, 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, 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 0.15. The TTL/H/FOV is less than or equal to 0.3, and the miniaturization is favorably realized.

In an exemplary embodiment, an optical lens according to the present application may satisfy: FNO/F is less than or equal to 0.5, wherein FNO is the numerical aperture 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 less than or equal to 0.2. The FNO/F is less than or equal to 0.5, and the optical 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: and the absolute value of (H-Fxtheta)/(Fxtheta) is less than or equal to 0.01 and less than or equal to 0.2, wherein theta is the tangent value of the maximum field angle 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 field angle of the optical lens. More specifically, H, F and θ further satisfy: the | (H-Fxtheta)/(Fxtheta) is not less than 0.01 and not more than 0.1. The requirement that (H-Fxtheta)/(Fxtheta) is less than or equal to 0.01 is met, the high angular resolution of the lens is facilitated, the focal length of the lens can be increased under the condition that the field angle and the size of an imaging surface of the 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, 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. Satisfies (FOV multiplied by F)/H is more than or equal to 40, and is beneficial to realizing large-angle resolution.

In an exemplary embodiment, an optical lens according to the present application may satisfy: and | F/R1| ≦ 3, wherein F is the total effective focal length of the optical lens, and R1 is the radius of curvature of the object-side surface of the first lens. More specifically, F and R1 further satisfy: the | F/R1| is less than or equal to 2. Satisfy | F/R1| ≦ 3, can avoid first lens object side camber undersize to produce the aberration when effectively avoiding light to incide, and be favorable to the production of first lens.

In an exemplary embodiment, an optical lens according to the present application may satisfy: R1/(R2+ T1) ≦ 2, wherein R1 is a radius of curvature of an object-side surface of the first lens, R2 is a radius of curvature of an image-side surface of the first lens, and T1 is a center thickness of the first lens. More specifically, R1, R2 and T1 may further satisfy: R1/(R2+ T1) is less than or equal to 1. Satisfy R1/(R2+ T1) 2 that is less than or equal to, be favorable to setting up the shape of first lens into being close the concentric circles for peripheral light has the optical path difference with central light, diverges central light, gets into rear optical lens, is favorable to reducing the lens front end bore, reduces the volume, is favorable to miniaturization and reduce cost.

In an exemplary embodiment, an optical lens according to the present application may satisfy: ab3/Nd3 is more than or equal to 50, wherein Nd3 is the refractive index of the third lens, and Ab3 is the Abbe number of the third lens. More specifically, Ab3 and Nd3 further may satisfy: ab3/Nd3 is not less than 52. The Ab3/Nd3 is more than or equal to 50, the chromatic aberration of the lens is reduced, and the reasonable distribution of the focal power of each lens is facilitated.

In an exemplary embodiment, an optical lens according to the present application may satisfy: -2X 10⁶≤F3/(dn3/dt3)≤-5×10⁵Wherein F3 is the effective focal length of the third lens, and dn3/dt3 is the temperature coefficient of the refractive index of the third lens, and represents the variation of the refractive index of the third lens material with the temperature variation. More specifically, F3 and dn3/dt3 further satisfy: -2.2X 10⁶≤F3/(dn3/dt3)≤-8×10⁵. Satisfies-2 x 10⁶≤F3/(dn3/dt3)≤-5×10⁵The optical lens can obtain better resolution in high and low temperature environments, and the thermal stability of the lens is improved.

In an exemplary embodiment, an optical lens according to the present application may satisfy: F3/F4 is less than or equal to 4, wherein F3 is the effective focal length of the third lens, and F4 is the effective focal length of the fourth lens. More specifically, F3 and F4 may further satisfy: F3/F4 is less than or equal to 3. The requirements of F3/F4 are less than or equal to 4, the light is in smooth transition, the aberration caused by over steep trend and over large angle of the light is reduced, and the image quality is improved.

In an exemplary embodiment, an optical lens according to the present application may satisfy: Tn/Tm is less than or equal to 3, wherein Tn is the central thickness of the nth lens with the largest central thickness among the third lens, the fourth lens and the fifth lens, Tm is the central thickness of the mth lens with the smallest central thickness among the third lens, the fourth lens and the fifth lens, and n and m are selected from 3, 4 and 5. More specifically, Tn and Tm further satisfy: Tn/Tm is less than or equal to 2, and the Tn/Tm is less than or equal to 3, so that the thickness uniformity of the third lens, the fourth lens and the fifth lens is facilitated, the action of each lens is stable, the light trend is stable in a high-temperature and low-temperature environment, and the lens has better temperature performance.

In an exemplary embodiment, an optical lens according to the present application may satisfy: and | R7/R8| ≦ 5, wherein R7 is the radius of curvature of the image-side surface of the third lens, and R8 is the radius of curvature of the object-side surface of the fourth lens. More specifically, R7 and R8 may further satisfy: the ratio of R7 to R8 is less than or equal to 3. The requirement that R7/R8 is less than or equal to 5 is met, the light trend can be effectively controlled, and the sensitivity of the lens is balanced.

In an exemplary embodiment, an optical lens according to the present application may satisfy: and | R9/R10| ≦ 5, wherein R9 is the radius of curvature of the image-side surface of the fourth lens, and R10 is the radius of curvature of the object-side surface of the fifth lens. More specifically, R9 and R10 may further satisfy: the ratio of R9 to R10 is less than or equal to 3. The requirement that R9/R10 is less than or equal to 5 is met, the light trend can be effectively controlled, and the sensitivity of the lens is balanced.

In an exemplary embodiment, a diaphragm for limiting a 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, the aperture of the lens is reduced, and the total length of the optical lens is shortened. 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. The arrangement of the diaphragm at a position away from the imaging surface is advantageous for the optical lens to have a smaller CRA. 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, a diaphragm for limiting a light beam may be disposed between the second lens and the third lens to further improve the imaging quality of the optical lens. The diaphragm is arranged between the second lens and the third lens, so that light rays entering the optical lens can be effectively converged, the aperture of the lens is reduced, and the total length of the optical lens is shortened. In the embodiment of the present application, the stop may be provided in the vicinity of the image-side surface of the second lens, or in the vicinity of the object-side surface of the third 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, an optical lens according to the present application may satisfy: and the FOV multiplied by H/L/TTL is less than or equal to 0.8, wherein L is the distance between the diaphragm and the imaging surface of the optical lens on the optical axis, 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, the 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, L, FOV, TTL and H further may satisfy: FOV multiplied by H/L/TTL is less than or equal to 0.5. The FOV multiplied by H/L/TTL is less than or equal to 0.8, and the lens can be ensured to have smaller CRA under the condition that the field angle and the imaging surface are fixed.

In an exemplary embodiment, an optical lens according to the present application may satisfy: T2/TTL is less than or equal to 0.12, wherein T2 is the central thickness of the second lens, 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, T2 and TTL further can satisfy: T2/TTL is less than or equal to 0.1. T2/TTL is less than or equal to 0.12, and the imaging quality is improved.

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 may 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 fifth lens and the sixth lens may be cemented to form a cemented lens. The fifth lens with positive focal power, the object side surface and the image side surface of which are both convex surfaces, and the sixth lens with negative focal power, the object side surface and the image side surface of which are both concave surfaces are cemented together, or the fifth lens with positive focal power, the object side surface of which is a convex surface and the image side surface of which is a concave surface, and the sixth lens with negative focal power, the object side surface of which is a convex surface and the image side surface of which is a concave surface are cemented together, so that the structure of the optical lens is compact, the size of the optical lens is reduced, various aberrations of the optical lens are favorably corrected, the total length of the optical lens is favorably reduced, and the resolution, the distortion, the CRA and other optical performances of the optical lens are favorably improved. Of course, the fifth lens and the sixth 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 among 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; further reducing the field curvature and effectively correcting the off-axis point aberration of the optical lens. 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 third lens, the fourth lens, the fifth lens, and the sixth lens may be spherical lenses. The second lens and the seventh lens may be aspherical lenses. In particular, in order to improve the resolution quality of the optical system, the first lens, the second lens, the third lens, the fourth lens, the fifth lens, the sixth lens, and the seventh lens may 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 application, through reasonable setting of the shapes and focal powers of the lenses, under the condition of only using 7 lenses, at least one beneficial effect that the optical system has high resolution (up to more than eight million pixels), low cost, high resolution, better chromatic aberration, miniaturization, good imaging quality and the like is achieved. Meanwhile, the optical lens also meets the requirements of small lens volume, small front end caliber, low sensitivity and high production yield. Through the reasonable selection of the materials of each lens in the optical lens and the reasonable collocation of each lens, the optical lens can have better imaging effect under different monochromatic lights so as to meet the requirements of the automatic driving technology. By reasonably setting the shapes of the lenses and reasonably distributing the focal power of the lenses, the aperture of the front end of the lens can be reduced, the total length of the lens is shortened, and the resolving power of the lens can be improved on the basis of miniaturization of the lens.

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 to seventh lenses in the optical lens may each be made of glass. 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 problem that the normal use of the lens is influenced due to the imaging blur of the lens caused by high and low temperature changes in the use environment can be avoided. 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.

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 element L2 is a concave-convex lens element with negative power, and has a concave object-side surface S3 and a convex image-side surface S4. 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 element L5 is a biconvex lens element with positive refractive power, and has a convex object-side surface S10 and a convex image-side surface S11. The sixth lens L6 is a biconcave lens with negative power, i.e., its object-side surface S11 is concave and its image-side surface S12 is concave. The seventh lens element L7 is a concave-convex lens element with negative power, i.e., the object-side surface S13 is concave and the image-side surface S14 is convex. The fifth lens L5 and the sixth lens L6 may be cemented to constitute a cemented lens.

The optical lens may further include a stop STO, which may be disposed between the second lens L2 and the third lens L3 to improve image quality. For example, the stop STO may be disposed between the second lens L2 and the third lens L3 at a position close to the image side surface S4 of the second lens L2.

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 deviations and/or protect the image sensing chip IMA at the imaging plane S17. The light from the object passes through the respective surfaces S1 to S16 in order and is finally imaged on the imaging surface S17.

Table 1 shows a radius of curvature R, a thickness T/distance d (it is understood that the thickness T/distance d of the row of S1 is the center thickness T1 of the first lens L1, the thickness T/distance d of the row of S2 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 Ab of each lens of the optical lens of example 1.

TABLE 1

In embodiment 1, the object-side surface S3 and the image-side surface S4 of the second lens L2 and the object-side surface S13 and the image-side surface S14 of the seventh lens L7 may both be aspheric, and the profile 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 that can be used for each of the aspherical mirror surfaces S3, S4, S13 and S14 in example 1.

Flour mark

k

A4

A6

A8

A10

A12

A14

A16

S3

3.6733

-2.0180E- 04

1.1804E- 05

-3.7680E- 07

1.3638E-08

-2.1304E- 10

/

S4

-92.9537

-2.0633E- 04

1.1392E- 05

-3.7023E- 07

1.2784E-08

-1.9459E- 10

/

S13

1.0392

-2.2871E- 03

1.7984E- 04

-5.5759E- 06

-7.8210E- 08

7.2865E-08

-5.9517E- 09

1.5001E- 10

S14

8.5086

-2.8198E- 03

1.7989E- 04

-6.0040E- 06

-6.5274E- 08

3.5849E-08

-2.0703E- 09

3.8300E- 11

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 T/distance d, refractive index Nd, and abbe number Ab 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

S3

-5.1490

-2.5950E- 04

1.1189E- 05

-3.0484E- 07

1.0653E-08

-1.6332E- 10

/

S4

-98.3303

-2.4605E- 04

1.0867E- 05

-2.9965E- 07

9.6194E-09

-1.4160E- 10

/

S13

0.8415

-2.0270E- 03

1.4270E- 04

-2.4230E- 06

-2.8594E- 07

6.6236E-08

-4.6280E- 09

1.0851E- 10

S14

-0.7440

-1.8353E- 03

1.4214E- 04

-2.6078E- 06

-2.3205E- 07

3.5501E-08

-1.7275E- 09

2.9211E- 11

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 convex-concave lens with negative power, and has a convex 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 meniscus lens element with positive refractive power, and has a concave object-side surface S8 and a convex image-side surface S9. The fifth lens element L5 is a biconvex lens element with positive refractive power, and has a convex object-side surface S10 and a convex image-side surface S11. The sixth lens L6 is a biconcave lens with negative power, i.e., its object-side surface S11 is concave and its image-side surface S12 is concave. The seventh lens L7 is a biconcave lens with negative power, i.e., its object-side surface S13 is concave and its image-side surface S14 is concave. The fifth lens L5 and the sixth lens L6 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 object side surface S4 of the second lens L2.

Table 5 shows the radius of curvature R, thickness T/distance d, refractive index Nd, and abbe number Ab 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

Flour mark

k

A4

A6

A8

A10

A12

A14

A16

S4

1.2952

-1.2954E- 03

2.8231E-05

-1.1027E- 06

4.6923E-08

-9.6715E- 10

-7.5578E- 12

4.4833E-13

S5

-0.0101

-1.4519E- 03

4.2838E-05

-2.3901E- 06

1.4469E-07

-5.2300E- 09

7.8911E-11

-1.0784E- 13

S13

373.623 7

-1.0956E- 03

3.8440E-05

-2.4599E- 07

3.5598E-08

-2.8229E- 09

1.8900E-10

-5.3813E- 12

S14

- 99.0000

-8.4346E- 04

-3.3566E- 05

5.9129E-06

-2.4085E- 07

-1.8293E- 09

5.5617E-10

-1.4307E- 11

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.

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 convex-concave lens with negative power, and has a convex 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 meniscus lens element with positive refractive power, and has a concave object-side surface S8 and a convex image-side surface S9. The fifth lens L5 is a convex-concave lens with positive refractive power, and has a convex object-side surface S10 and a concave image-side surface S11. The sixth lens element L6 is a convex-concave lens element with negative power, i.e., the object-side surface S11 is convex and the image-side surface S12 is concave. The seventh lens L7 is a biconcave lens with negative power, i.e., its object-side surface S13 is concave and its image-side surface S14 is concave. The fifth lens L5 and the sixth lens L6 may be cemented to constitute a cemented lens.

Table 7 shows the radius of curvature R, thickness T/distance d, refractive index Nd, and abbe number Ab 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

S4

82.8733

-1.3212E- 03

4.7371E- 05

-1.4337E- 06

2.8835E-08

-6.2792E- 10

3.6269E- 11

-9.9987E- 13

S5

0.2431

-1.4170E- 03

6.2673E- 05

-2.8691E- 06

1.2597E-07

-4.6903E- 09

1.1797E- 10

-1.4420E- 12

S13

61.9433

-1.2975E- 03

5.2791E- 05

-5.8736E- 07

3.2396E-08

-1.7426E- 10

1.5165E- 10

-9.4582E- 12

S14

-99.0000

-1.0962E- 03

1.5955E- 05

3.8287E-06

-2.1662E- 07

8.6111E-10

5.6570E- 10

-1.9456E- 11

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 concave-convex lens element with negative power, and has a concave object-side surface S1 and a convex image-side surface S2. The second lens element L2 is a concave-convex lens element with negative power, and has a concave object-side surface S3 and a convex image-side surface S4. 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 element L5 is a biconvex lens element with positive refractive power, and has a convex object-side surface S10 and a convex image-side surface S11. The sixth lens L6 is a biconcave lens with negative power, i.e., its object-side surface S11 is concave and its image-side surface S12 is concave. The seventh lens L7 is a biconcave lens with negative power, i.e., its object-side surface S13 is concave and its image-side surface S14 is concave. The fifth lens L5 and the sixth lens L6 may be cemented to constitute a cemented lens.

Table 9 shows the radius of curvature R, thickness T/distance d, refractive index Nd, and abbe number Ab 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

S3

12.1836

-5.0896E- 04

1.0031E- 05

-3.7702E- 07

1.3082E-08

-1.5527E- 10

/

S4

99.0000

-4.3318E- 04

1.0027E- 05

-2.9932E- 07

8.9376E-09

-9.8144E- 11

/

S13

-13.2959

-2.8218E- 03

1.3834E- 04

-6.3470E- 06

-1.6264E- 07

7.1399E-08

-5.0986E- 09

1.2191E- 10

S14

1.6473

-1.9669E- 03

1.4351E- 04

-7.1836E- 06

7.3814E-09

3.5566E-08

-2.2275E- 09

4.4193E- 11

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 T/distance d, refractive index Nd, and abbe number Ab 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

S3

12.0741

-5.0786E- 04

1.0108E- 05

-3.8114E- 07

1.3168E-08

-1.5593E- 10

/

S4

98.6619

-4.3220E- 04

1.0124E- 05

-3.0528E- 07

9.0927E-09

-9.9669E- 11

/

S13

-13.4408

-2.1837E- 03

1.9394E- 04

-6.3355E- 06

-1.7037E- 07

7.1705E-08

-5.0809E- 09

1.2089E- 10

S14

0.0081

-1.9640E- 03

1.4422E- 04

-7.2677E- 06

1.0660E-08

3.5673E-08

-2.2414E- 09

4.4556E- 11

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 element L2 is a concave-convex lens element with negative power, and has a concave object-side surface S3 and a convex image-side surface S4. 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 element L5 is a biconvex lens element with positive refractive power, and has a convex object-side surface S10 and a convex image-side surface S11. The sixth lens L6 is a biconcave lens with negative power, i.e., its object-side surface S11 is concave and its image-side surface S12 is concave. The seventh lens L7 is a convex-concave lens with negative power, i.e., the object-side surface S13 is convex, and the image-side surface S14 is concave. The fifth lens L5 and the sixth lens L6 may be cemented to constitute a cemented lens.

Table 13 shows the radius of curvature R, thickness T/distance d, refractive index Nd, and abbe number Ab 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

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 element L2 is a concave-convex lens element with negative power, and has a concave object-side surface S3 and a convex image-side surface S4. 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 element L5 is a biconvex lens element with positive refractive power, and has a convex object-side surface S10 and a convex image-side surface S11. The sixth lens L6 is a biconcave lens with negative power, i.e., its object-side surface S11 is concave and its image-side surface S12 is concave. The seventh lens element L7 is a meniscus lens element with positive refractive power, i.e., the object-side surface S13 is concave and the image-side surface S14 is convex. The fifth lens L5 and the sixth lens L6 may be cemented to constitute a cemented lens.

Table 15 shows the radius of curvature R, thickness T/distance d, refractive index Nd, and abbe number Ab 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

S3

-3.3876

-1.4880E- 04

1.0092E- 05

-5.0672E- 07

5.2275E-08

-1.3730E- 09

/

S4

-99.0000

-1.1477E- 04

9.4587E- 06

-3.4114E- 07

-1.5931E- 09

1.0389E-09

/

S13

3.0201

-1.3597E- 03

1.9653E- 04

-8.4161E- 06

-1.8770E- 07

7.6888E-08

-5.1520E- 09

1.4161E- 10

S14

-23.1682

-4.8265E- 03

3.1181E- 04

-7.6064E- 06

-1.6880E- 07

3.5006E-08

-1.9463E- 09

4.2765E- 11

TABLE 16

Example 9

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

As shown in fig. 9, 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 element L2 is a concave-convex lens element with negative power, and has a concave object-side surface S3 and a convex image-side surface S4. The third lens element L3 is a meniscus lens element with positive refractive power, and has a concave 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 element L5 is a biconvex lens element with positive refractive power, and has a convex object-side surface S10 and a convex image-side surface S11. The sixth lens L6 is a biconcave lens with negative power, i.e., its object-side surface S11 is concave and its image-side surface S12 is concave. The seventh lens L7 is a convex-concave lens with positive optical power, i.e., the object-side surface S13 is convex and the image-side surface S14 is concave. The fifth lens L5 and the sixth lens L6 may be cemented to constitute a cemented lens.

Table 17 shows the radius of curvature R, thickness T/distance d, refractive index Nd, and abbe number Ab of each lens of the optical lens of example 9. Table 18 shows conic coefficients and high-order term coefficients that can be used for each aspherical mirror surface in example 9, wherein each aspherical mirror surface type can be defined by formula (1) given in example 1 above.

TABLE 17

Flour mark

k

A4

A6

A8

A10

A12

A14

A16

S3

-0.0211

-1.9800E- 04

2.0610E-05

-1.2564E- 06

4.4044E-08

-6.8211E- 10

/

S4

-3.9542

1.5380E-04

2.2000E-05

-1.0644E- 06

3.5837E-08

-5.2509E- 10

/

S13

99.0000

8.5029E-05

1.2540E-05

-3.6736E- 06

-1.3677E- 07

6.7817E-08

-5.2857E- 09

1.3259E- 10

S14

-14.0920

1.3440E-05

-8.6484E- 06

-2.8159E- 06

-1.2103E- 08

2.9147E-08

-2.1538E- 09

4.8700E- 11

Watch 18

Example 10

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

As shown in fig. 10, the optical lens 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 element L2 is a concave-convex lens element with negative power, and has a concave object-side surface S3 and a convex image-side surface S4. The third lens element L3 is a meniscus lens element with positive refractive power, and has a concave 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 element L5 is a biconvex lens element with positive refractive power, and has a convex object-side surface S10 and a convex image-side surface S11. The sixth lens L6 is a biconcave lens with negative power, i.e., its object-side surface S11 is concave and its image-side surface S12 is concave. The seventh lens element L7 is a biconvex lens element with positive power, i.e., the object-side surface S13 is convex and the image-side surface S14 is convex. The fifth lens L5 and the sixth lens L6 may be cemented to constitute a cemented lens.

Table 19 shows the radius of curvature R, thickness T/distance d, refractive index Nd, and abbe number Ab of each lens of the optical lens of example 10. Table 20 shows conic coefficients and high-order term coefficients that can be used for each aspherical mirror surface in example 10, wherein each aspherical mirror surface type can be defined by formula (1) given in example 1 above.

Watch 19

Flour mark

k

A4

A6

A8

A10

A12

A14

A16

S3

2.3687

-4.5542E- 04

2.2455E-05

-8.6373E- 07

3.4376E-08

-5.9309E- 10

/

S4

27.3352

-6.7301E- 05

2.0770E-05

-7.9300E- 07

2.8445E-08

-3.8270E- 10

/

S13

-34.0798

5.6270E-04

-2.1688E- 06

-5.4293E- 07

-3.9244E- 07

6.5295E-08

-4.3281E- 09

1.0125E- 10

S14

99.0000

4.3928E-04

-2.5642E- 05

-9.6095E- 07

-1.0132E- 07

2.7633E-08

-1.7669E- 09

3.8496E- 11

Watch 20

In summary, examples 1 to 10 satisfy the relationships shown in tables 21-1 and 21-2 below, respectively. In tables 21-1 and 21-2, units of TTL, F, D, H, FNO, R1, R2, R7, R8, R9, R10, T1, T2, Tn, Tm, F3, F4, L are millimeters (mm), and units of FOV are degrees (°).

TABLE 21-1

TABLE 21-2

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:

a first lens having an optical power;

a second lens having a negative optical power;

the image side surface of the third lens is a convex surface;

a fourth lens having a positive optical power;

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

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

a seventh lens having optical power.

2. An optical lens as claimed in claim 1, characterized in that the first lens element has a positive optical power and has a convex object-side surface and a concave image-side surface.

3. An optical lens as claimed in claim 1, characterized in that the first lens element has a negative optical power and has a concave object-side surface and a convex image-side surface.

4. An optical lens barrel according to claim 1, wherein the second lens element has a concave object-side surface and a convex image-side surface.

5. An optical lens barrel according to claim 1, wherein the second lens element has a convex object-side surface and a concave image-side surface.

6. An optical lens barrel according to claim 1, wherein the object side surface of the third lens is convex.

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

8. An optical lens barrel according to claim 1, wherein the fourth lens element has a convex object-side surface and a concave image-side surface.

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

a first lens having an 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 positive optical power;

a sixth lens having a negative optical power; and

a seventh lens having optical power;

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 satisfy the following conditions: (FOV F)/H.gtoreq.40.

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 electrical signal.