CN114442258A

CN114442258A - Optical lens and electronic device

Info

Publication number: CN114442258A
Application number: CN202011189079.9A
Authority: CN
Inventors: 朱松河; 王东方; 姚波
Original assignee: Ningbo Sunny Automotive Optech Co Ltd
Current assignee: Ningbo Sunny Automotive Optech Co Ltd
Priority date: 2020-10-30
Filing date: 2020-10-30
Publication date: 2022-05-06

Abstract

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

Description

Optical lens and electronic device

Technical Field

The present application relates to the field of optical elements, and in particular, to an optical lens and an electronic apparatus.

Background

In recent years, with the rapid development of automobile driving assistance systems, the application of optical lenses in automobiles is more and more extensive, and at the same time, the requirements of vehicle-mounted optical lenses on pixels are higher and higher. Currently, more and more optical lens manufacturers are beginning to research how to enable the vehicle-mounted front-view optical lens to stably image in high and low temperature environments.

Generally, users have very high requirements on imaging performance of an in-vehicle front view optical lens for safety, and thus the in-vehicle front view optical lens needs to have a higher pixel on a miniaturized basis. For example, in order to improve the resolution of the vehicle-mounted forward-looking optical lens, 7 or more lens structures are generally selected to form the vehicle-mounted forward-looking optical lens, but the miniaturization of the vehicle-mounted forward-looking optical lens is seriously affected by too many lens structures. In addition, the on-vehicle forward-looking optical lens is also required to have high stability in order to avoid degradation of optical performance under temperature variation.

Therefore, how to make an optical lens have miniaturization, high resolution, low cost and better temperature performance is one of the problems to be solved by many lens designers.

Disclosure of Invention

The present application provides an optical lens applicable to vehicle-mounted installation that may solve at least or partially at least one of the above-mentioned disadvantages of the prior art.

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

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

In one embodiment, the image side surface of the third lens may be concave.

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

In one embodiment, the image side surface of the fourth lens may be concave.

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

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

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

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

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

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

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

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

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

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

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

In one embodiment, the first lens and the sixth lens may be aspheric lenses.

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 3.5.

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 the optical axis and a distance BFL between a center of an image-side surface of the sixth lens element and the imaging surface on the optical axis may satisfy: BFL/TTL is more than or equal to 0.07.

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 0.1.

In one embodiment, the effective focal length F3 of the third lens and the effective focal length F4 of the fourth lens may satisfy: the absolute value of F3/F4 is more than or equal to 0.5 and less than or equal to 2.3.

In one embodiment, the effective focal length F1 of the first lens and the total effective focal length F of the optical lens may satisfy: and the | F1/F | is more than or equal to 2.5.

In one embodiment, the total effective focal length F of the optical lens and the radius of curvature R1 of the object side surface of the first lens can satisfy: the absolute value of F/R1 is more than or equal to 0.5 and less than or equal to 2.5.

In one embodiment, the effective focal length F1 of the first lens and the effective focal length F2 of the second lens may satisfy: and the | F1/F2| is more than or equal to 2.5.

In one embodiment, the radius of curvature R4 of the object-side surface of the second lens and the radius of curvature R5 of the image-side surface of the second lens may satisfy: and the l (R4-R5)/(R4+ R5) l is equal to or more than 0.5.

In one embodiment, the combined focal length F34 of the third and fourth lenses and the total effective focal length F of the optical lens may satisfy: and the | F34/F | is more than or equal to 0.5.

In one embodiment, the radius of curvature R1 of the object-side surface of the first lens and the radius of curvature R2 of the image-side surface of the first lens may satisfy: the ratio of R1 to R2 is less than or equal to 3.6.

In one embodiment, the radius of curvature R11 of the object-side surface of the sixth lens and the radius of curvature R12 of the image-side surface of the sixth lens may satisfy: the ratio of R11 to R12 is less than or equal to 3.6.

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, 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: TTL/H/FOV is less than or equal to 0.15.

In one embodiment, a distance T12 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: T12/TTL is more than or equal to 0.08.

In one embodiment, a distance T23 between the center of the image-side surface of the second lens and the center of the object-side surface of the third 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: T23/TTL is less than or equal to 0.05.

In one embodiment, the effective focal length F2 of the second lens and the total effective focal length F of the optical lens may satisfy: the ratio of F2/F is less than or equal to 2.

In one embodiment, a center thickness dn of an nth lens having a largest center thickness among the first to sixth lenses and a center thickness dm of an mth lens having a smallest center thickness among the first to sixth lenses satisfy: dn/dm ≧ 3, where n and m are selected from 1, 2, 3, 4, 5, and 6.

Another aspect of the present application provides an optical lens that may include, in order from an object side to an image side along an optical axis: a first lens having a negative optical power; a second lens having a positive optical power; a third lens having a positive optical power; a fourth lens having a negative optical power; a fifth lens having optical power; and a sixth lens with focal power, wherein the distance T12 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 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 can satisfy the following conditions: T12/TTL is more than or equal to 0.08.

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

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

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

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

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

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

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

In one embodiment, the first lens and the sixth lens may be aspheric lenses.

In one embodiment, a distance TTL between a center of an object-side surface of the first lens and an image plane 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: TTL/H/FOV is less than or equal to 0.15.

In one embodiment, a center thickness dn of an nth lens having a largest center thickness among the first to sixth lenses and a center thickness dm of an mth lens having a smallest center thickness among the first to sixth lenses satisfy: dn/dm ≧ 3, where n and m are selected from 1, 2, 3, 4, 5, and 6. 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 high resolution, miniaturization, low cost, good temperature performance and the like.

Drawings

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

fig. 1 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 view showing a structure of an optical lens according to embodiment 3 of the present application;

fig. 4 is a schematic view showing a structure of 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;

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

fig. 11 is a schematic structural view showing an optical lens according to embodiment 11 of the present application; and

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

Detailed Description

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

It should be noted that in this specification, the expressions first, second, third, etc. are used only to distinguish one feature from another, and do not represent any limitation on the features. Thus, the first lens discussed below may also be referred to as the second lens or the third lens without departing from the teachings of the present application.

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

Herein, the paraxial region refers to a region near the optical axis. If the lens surface is convex and the convex position is not defined, it means that the lens surface is convex at least in the paraxial region; if the lens surface is concave and the concave position is not defined, it means that the lens surface is concave at least in the paraxial region. The surface of each lens closest to the object is called the object side surface of the lens, and the surface of each lens closest to the imaging surface is called the image side surface of the lens.

It will be further understood that the terms "comprises," "comprising," "has," "having," "includes" and/or "including," when used in this specification, specify the presence of stated features, elements, and/or components, but do not preclude the presence or addition of one or more other features, elements, components, and/or groups thereof. Moreover, when a statement such as "at least one of" appears after the list of listed features, that 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.

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

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

In an exemplary embodiment, the first lens can have a negative power, and the object-side surface can be convex and the image-side surface can be concave. The first lens is arranged in a meniscus shape facing an object side, so that light rays entering the optical system stably enter the rear of the system, the resolving power of the optical lens is improved, and light rays with a large field of view can be collected as far as possible to enter the rear of the system, and the light flux can be effectively increased. In addition, the object side surface of the first lens is arranged to be convex, so that water drops can slide off in actual use environments (such as rainy and snowy weather), and the influence of severe environments on imaging can be effectively reduced. The aspheric lens has a better curvature radius characteristic, and at least one of the object side surface and the image side surface of the first lens can be arranged into an aspheric mirror surface in use, so that the resolution quality of the lens is further improved.

In an exemplary embodiment, the second lens may have a positive optical power, and the object-side surface thereof may be convex and the image-side surface thereof may be convex. The second lens can effectively converge the light rays entering the optical system, reduce the aperture of the optical lens and realize the miniaturization of the optical lens.

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

In an exemplary embodiment, the third lens and the fourth lens may be combined into a cemented lens by cementing the image-side surface of the third lens with the object-side surface of the fourth lens. By introducing the cemented lens, light passing through the third lens can be smoothly transited to the rear of the optical system, and the total length of the optical lens is reduced. The use of cemented lenses in optical lenses helps to reduce the air space between the lenses, making the overall system more compact; meanwhile, the assembling parts between the third lens and the fourth lens are reduced, so that the processing procedures can be reduced, and the cost of the optical lens is reduced; in addition, the tolerance sensitivity problems such as inclination, core deviation and the like generated in the assembling process of the lens unit can be reduced; moreover, the light quantity loss caused by reflection between the lenses can be reduced, and the illumination intensity is improved; secondly, the chromatic aberration can be eliminated, and the residual chromatic aberration can be eliminated to balance the chromatic aberration of the system. In the cemented lens, the third lens close to the object side may have positive focal power, and the fourth lens close to the image side may have negative focal power, which is beneficial to smoothly transition incident light to the rear lens, so that various aberrations in the optical system are fully corrected, and while the optical lens has a compact structure, the resolution of the optical lens is improved, and optical performances such as Chief Ray Angle (CRA) and distortion of the optical lens are optimized.

By using the gluing piece, the whole chromatic aberration correction of the sharing system is facilitated, so that the chromatic aberration can be effectively corrected, and the resolution is improved. Moreover, after the glue assembly is used, the whole optical system can be compact, and the miniaturization requirement can be better met.

In an exemplary embodiment, the fifth lens may have a positive power or a negative power. The fifth lens may have a concavo-convex type, a convex-concave type, and a biconcave type. The light angle and the surface type of the fifth lens are reasonably distributed, so that the incident light can be smoothly transited to the sixth lens, and the resolution of the optical lens is favorably improved.

In an exemplary embodiment, the sixth lens may have a positive power or a negative power. The fifth lens may have a concavo-convex type, a convex-concave type, and a biconcave type. The light angle and the surface type of the sixth lens are reasonably distributed, so that the incident light can be smoothly transited to an imaging surface, and the resolution of the optical lens is favorably improved. At least one of the object side surface and the image side surface of the sixth lens can be arranged to be an aspheric mirror surface in use to further improve the resolution quality of the lens.

In an exemplary embodiment, a distance TTL on an optical axis from a center of an object side surface of the first lens to an imaging surface of the optical lens and a total effective focal length F of the optical lens may satisfy: TTL/F is less than or equal to 3.5. For example, 1 ≦ TTL/F ≦ 2. The mutual relation between the total optical length of the optical lens and the total effective focal length of the optical lens is reasonably controlled, and the miniaturization of the optical lens can be realized.

In an exemplary 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 an optical axis and a distance BFL from a center of an image-side surface of the sixth lens to the imaging surface on the optical axis may satisfy: BFL/TTL is more than or equal to 0.07. For example, 0.1 ≦ BFL/TTL ≦ 0.2. By controlling the ratio of the optical back focus of the optical lens to the optical total length of the optical lens within a reasonable numerical range, the length of the back focus of the optical lens can be ensured on the basis of miniaturization of an optical system, and system assembly is facilitated; meanwhile, the optical lens with a compact structure is obtained, the sensitivity of the lens to a Modulation-Transfer-Function (MTF) is reduced, the production yield of the optical lens is improved, and the production cost of the optical lens is reduced.

In an exemplary embodiment, the maximum field angle FOV of the optical lens, the maximum clear aperture D of the object-side surface of the first lens corresponding to the maximum field angle of the optical lens, and the image height H corresponding to the maximum field angle of the optical lens may satisfy: D/H/FOV is less than or equal to 0.1. For example, 0.01. ltoreq. D/H/FOV. ltoreq.0.1. The maximum field angle of the optical lens, the maximum clear aperture of the object side surface of the first lens corresponding to the maximum field angle of the optical lens and the image height corresponding to the maximum field angle of the optical lens are reasonably controlled, the small caliber at the front end of the optical lens can be ensured, and the optical lens is miniaturized.

In an exemplary embodiment, the effective focal length F3 of the third lens and the effective focal length F4 of the fourth lens may satisfy: the absolute value of F3/F4 is more than or equal to 0.5 and less than or equal to 2.3. For example, 1 ≦ F3/F4 ≦ 2. By controlling the ratio of the effective focal lengths of the three lenses and the fourth lens within a reasonable numerical range, the focal lengths of the two lenses in the cemented lens are close, which is helpful for the light to be gentle and excessive and correcting the chromatic aberration of the system.

In an exemplary embodiment, the effective focal length F1 of the first lens and the total effective focal length F of the optical lens may satisfy: and the | F1/F | is more than or equal to 2.5. For example, 2.8 ≦ F1/F ≦ 5. By controlling the ratio of the effective focal length of the first lens to the total effective focal length of the optical lens within a reasonable numerical range, more light rays can enter the optical lens stably, so that the illumination of the optical lens is increased.

In an exemplary embodiment, the total effective focal length F of the optical lens and the radius of curvature R1 of the object side surface of the first lens may satisfy: absolute F/R1 is more than or equal to 0.5 and less than or equal to 2.5. For example, 1 ≦ F/R1 ≦ 2.5. The mutual relation between the total effective focal length of the optical lens and the curvature radius of the object side surface of the first lens is reasonably controlled, the problem that the curvature of the object side surface of the first lens is too small can be effectively avoided, aberration is prevented from being generated when light rays are incident, and the processing of the first lens is facilitated.

In an exemplary embodiment, the effective focal length F1 of the first lens and the effective focal length F2 of the second lens may satisfy: and the | F1/F2| is more than or equal to 2.5. For example, 3 ≦ F1/F2 ≦ 6. The mutual relation between the effective focal lengths of the first lens and the second lens is reasonably controlled, so that the adjacent first lens and the second lens can obtain larger focal lengths, the concentration of light rays entering the optical lens is facilitated, and the imaging quality of the optical lens is improved.

In an exemplary embodiment, the radius of curvature R4 of the object-side surface of the second lens and the radius of curvature R5 of the image-side surface of the second lens may satisfy: and the l (R4-R5)/(R4+ R5) l is equal to or more than 0.5. For example, 3 ≦ l (R4-R5)/(R4+ R5) ≦ 7.6. The mutual relation between the curvature radiuses of the object side surface and the image side surface of the second lens is reasonably controlled, the aberration of the optical lens can be corrected, smooth transition of light rays passing through the second lens is guaranteed, and therefore tolerance sensitivity of the optical lens is reduced.

In an exemplary embodiment, the combined focal length F34 of the third and fourth lenses and the total effective focal length F of the optical lens may satisfy: and the | F34/F | is more than or equal to 0.5. For example, 2 ≦ F34/F ≦ 75. The ratio of the combined focal length of the third lens and the fourth lens to the total effective focal length of the optical lens is controlled within a reasonable numerical range, so that thermal compensation is facilitated to be realized, and the temperature performance of the optical lens is improved.

In an exemplary embodiment, the radius of curvature R1 of the object-side surface of the first lens and the radius of curvature R2 of the image-side surface of the first lens may satisfy: the ratio of R1 to R2 is less than or equal to 3.6. For example, 1.4 ≦ R1/R2 ≦ 1.6. The ratio of the curvature radius of the object side surface and the curvature radius of the image side surface of the first lens are controlled within a reasonable numerical range, so that the curvature radius values of the object side surface and the curvature radius values of the image side surface of the first lens are close, light rays enter the optical lens smoothly, and the resolution power of the optical lens is improved.

In an exemplary embodiment, a radius of curvature R11 of the object-side surface of the sixth lens and a radius of curvature R12 of the image-side surface of the sixth lens may satisfy: the ratio of R11 to R12 is less than or equal to 3.6. For example, 0.1 ≦ R11/R12 ≦ 3.6. The ratio of the curvature radius of the object side surface and the curvature radius of the image side surface of the sixth lens are controlled within a reasonable numerical range, so that the curvature radius values of the object side surface and the curvature radius values of the image side surface of the sixth lens are close to each other, light rays enter an imaging surface slowly, the resolving power of the optical lens is improved, and the chief ray angle CRA of the optical lens is optimized.

In an exemplary embodiment, the total optical length TTL of the optical lens, the maximum field angle FOV of the optical lens, and the image height H corresponding to the maximum field angle of the optical lens may satisfy: TTL/H/FOV is less than or equal to 0.15. For example, 0.05 ≦ TTL/H/FOV ≦ 0.1. The mutual relation among the total optical length of the optical lens, the maximum field angle of the optical lens and the image height corresponding to the maximum field angle of the optical lens is reasonably controlled, the miniaturization of an optical system is facilitated, and the size of the optical lens can be effectively reduced under the condition that the imaging surfaces are the same and the image heights are the same.

In an exemplary embodiment, a distance T12 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: T12/TTL is more than or equal to 0.08. For example, 0.08. ltoreq. T12/TTL. ltoreq.0.2. By controlling the ratio of the distance between the center of the image side surface of the first lens and the center of the object side surface of the second lens on the optical axis to 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 within a reasonable numerical range, the distance between the first lens and the second lens is larger, and the chief ray angle CRA of the optical lens is effectively reduced.

In an exemplary embodiment, a distance T23 between the center of the image-side surface of the second lens and the center of the object-side surface of the third 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: T23/TTL is less than or equal to 0.05. For example, 0.001 ≦ T23/TTL ≦ 0.04. The ratio of the distance between the center of the image side surface of the second lens and the center of the object side surface of the third lens on the optical axis to 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 is controlled within a reasonable numerical range, so that the distance between the second lens and the third lens is small, and the optical lens is favorably miniaturized.

In an exemplary embodiment, the effective focal length F2 of the second lens and the total effective focal length F of the optical lens may satisfy: the ratio of F2/F is less than or equal to 2. For example, 0.7 ≦ F2/F ≦ 0.9. The mutual relation between the effective focal length of the second lens and the total effective focal length of the optical lens is reasonably controlled, and various aberrations of the optical lens are balanced.

In an exemplary embodiment, a center thickness dn of an nth lens having a largest center thickness among the first to sixth lenses and a center thickness dm of an mth lens having a smallest center thickness among the first to sixth lenses satisfy: dn/dm ≧ 3, where n and m are selected from 1, 2, 3, 4, 5, and 6. For example, 3. ltoreq. dn/dm. ltoreq.9.5. The mutual relation between the lens with the maximum central thickness and the lens with the minimum central thickness in the optical lens is reasonably controlled, the parameters of all the lenses of the optical lens are favorably optimized, the thickness of the lenses is uniform, the action is stable, the change of light rays entering the optical lens at high and low temperatures is favorably controlled, and the optical lens has better temperature performance.

In an exemplary embodiment, a diaphragm may be disposed between, for example, 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 the aperture of the diaphragm is increased, and the imaging quality of the lens is further improved. The diaphragm can effectively collect light rays entering the optical system and reduce the aperture of the lens. It should be understood that the diaphragm position is not limited to the above-described position, but may be set at any other position as needed.

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

In an exemplary embodiment, the object side surface and the image side surface of at least one of the first lens and the sixth lens may be aspheric. 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. For example, at least one of the object-side surface and the image-side surface of the first lens and the sixth lens may adopt an aspheric lens to further improve the resolution quality. However, in order to improve the imaging quality, the number of aspherical lenses of the optical lens according to the present application may be increased. For example, in the case where the importance is placed on the resolution quality and reliability, the first to sixth lenses may each employ an aspherical lens, such as a glass aspherical lens.

According to the optical lens of the embodiment of the application, through reasonable setting of the shapes and the focal powers of all the lenses, under the condition that only 6 lenses are used, the optical lens has high resolving power, and meanwhile, the optical system also meets the requirements of small lens volume, low sensitivity and high production yield. The main ray angle CRA of the optical lens is small, so that stray light can be effectively prevented from being generated when the rear end of light is emitted to the lens barrel, and the optical lens can be well matched with a vehicle-mounted chip so as to avoid the phenomena of color cast and dark angle. 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, the whole chromatic aberration correction of the system is shared, the system aberration is corrected, the system resolution quality is improved, the matching sensitivity problem is reduced, the whole structure of the optical system is compact, and the miniaturization requirement is met.

In an exemplary embodiment, the first to sixth 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 sixth 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 sixth 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 six lenses are exemplified in the embodiment, the optical lens is not limited to include six lenses. The optical lens may also include other numbers of lenses, if desired.

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

Example 1

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

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

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

The second lens element L2 is a biconvex lens with positive refractive power, and has a convex object-side surface S4 and a convex image-side surface S5, and both the object-side surface S4 and the image-side surface S5 of the second lens element L2 are spherical surfaces.

The third lens element L3 is a biconvex lens with positive refractive power, and has a convex object-side surface S6 and a convex image-side surface S7, and both the object-side surface S6 and the image-side surface S7 of the third lens element L3 are spherical surfaces.

The fourth lens L4 is a biconcave lens with negative power, the object-side surface S7 is concave, the image-side surface S8 is concave, and the object-side surface S7 and the image-side surface S8 of the fourth lens L4 are both spherical.

The fifth lens L5 is a meniscus lens with positive power, the object-side surface S9 is concave, the image-side surface S10 is convex, and both the object-side surface S9 and the image-side surface S10 of the fifth lens L5 are spherical.

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

In the present embodiment, the third lens L3 and the fourth lens L4 may be cemented to constitute a cemented lens.

Optionally, the optical lens may further include an auxiliary lens L7 having no optical power, which has an object side surface S13 and an image side surface S14, and the auxiliary lens L7 may be a filter or a protective glass. Filters may be used to correct for color deviations. The protective glass may be used to protect the image sensing chip at the imaging plane IMA. Light from the object passes through each of the surfaces S1 to S14 in sequence and is finally imaged on the imaging plane IMA.

In the optical lens of the present embodiment, the optical lens may further include a stop STO, and the stop STO may be disposed between the first lens L1 and the second lens L2 to further improve the imaging quality.

Table 1 shows a radius of curvature R, a thickness d/a distance T (it is understood that the thickness d/the distance T of the row in which S1 is located is the center thickness d1 of the first lens L1, the thickness d/the distance T of the row in which S2 is located is the separation distance T12 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 the present embodiment, the maximum field angle FOV of the optical lens is 34.4 °. Table 2 below shows the total optical length TTL of the optical lens of example 1 (i.e., the distance on the optical axis from the center of the object-side surface S1 of the first lens L1 to the imaging surface IMA), the total effective focal length F of the optical lens, the image height H corresponding to the maximum angle of view of the optical lens, the maximum clear aperture D of the object-side surface S1 of the first lens corresponding to the maximum angle of view of the optical lens, the optical back focus BFL of the optical lens (i.e., the distance on the optical axis from the center of the image-side surface S12 of the sixth lens to the imaging surface IMA), the effective focal length F1 of the first lens, the effective focal length F2 of the second lens, the effective focal length F3 of the third lens, the effective focal length F4 of the fourth lens, the effective focal length F5 of the fifth lens, the effective focal length F6 of the sixth lens, the combined focal length F34 of the third lens and the fourth lens, the n-th lens having the maximum center thickness of the center of the first lens to the sixth lens, and the minimum thickness of the center of the first lens to the sixth lens The center thicknesses dm (n and m are selected from 1, 2, 3, 4, 5, and 6), 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, the radius of curvature of the object-side surface of the second lens R4, the radius of curvature of the image-side surface of the second lens R5, the radius of curvature of the object-side surface of the sixth lens R11, the radius of curvature of the image-side surface of the sixth lens R12, the distance between the center of the image-side surface of the first lens and the center of the object-side surface of the second lens on the optical axis T12, and the distance between the center of the image-side surface of the second lens and the center of the object-side surface of the third lens on the optical axis T23, wherein TTL, BFL, F, D, H, F5, F2, F3, F34, F4, F5, F6, dn, R1, R2, R4, R5, R87452, R9372, T3646 mm.

TTL	28.2534	F2	12.7808
				BFL	2.9370	F3	9.8442
F	15.8517	F34	-69.4149
				D	11.1783	F4	-6.9068
H	9.1740	F5	22.8126
				F1	-51.3632	F6	-19.1804
dn	5.3000	dm	0.8000
				R1	7.6385	R2	5.3300
R4	18.1748	R5	-12.4359
				R11	-18.0000	R12	55.0000
T12	3.9313	T23	0.1000

TABLE 2

In embodiment 1, the object-side surface and the image-side surface of the first lens L1 and the sixth lens L6 may 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 the conic coefficient conc; ai is the correction coefficient of the i-th order of the aspherical surface. Table 3 below shows the conic coefficients k and the high-order term coefficients a4, a6, A8, a10, a12, a14, and a16 that can be used for the aspherical lens surfaces S1, S2, S11, and S12 in example 1.

Flour mark

k

A4

A6

A8

A10

A12

A14

A16

S1

0.1267

-5.2192E-04

-1.2437E-05

2.0968E-07

-1.8583E-08

6.9612E-10

-1.6197E-11

1.8600E-13

S2

-0.1808

-7.5286E-04

-2.3753E-05

1.0831E-07

-3.2215E-08

1.9885E-09

-9.4121E-11

1.9850E-12

S11

10.7000

-2.7884E-04

-4.6736E-05

1.3303E-05

-1.6619E-06

1.1519E-07

-4.0721E-09

5.8621E-11

S12

0.9000

-1.1775E-03

3.1176E-05

-5.4518E-06

5.9148E-07

-3.5918E-08

1.1381E-09

-1.4599E-11

TABLE 3

Example 2

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

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

The third lens L3 is a biconvex lens with positive power, the object-side surface S6 is a convex surface, the image-side surface S7 is a convex surface, and both the object-side surface S6 and the image-side surface S7 of the third lens L3 are spherical surfaces.

The fifth lens element L5 is a biconvex lens with positive refractive power, and has a convex object-side surface S9 and a convex image-side surface S10, and the object-side surface S9 and the image-side surface S10 of the fifth lens element L5 are both spherical surfaces.

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

In the optical lens of the present embodiment, the stop STO may be disposed between the first lens L1 and the second lens L2 to further improve the imaging quality.

Table 4 shows the radius of curvature R, thickness d/distance T, refractive index Nd, and dispersion coefficient Vd of each lens of the optical lens of example 2.

TABLE 4

In the present embodiment, the maximum field angle FOV of the optical lens is 34.4 °. Table 5 below shows the total optical length TTL of the optical lens of example 2 (i.e., the distance on the optical axis from the center of the object-side surface S1 of the first lens L1 to the imaging surface IMA), the total effective focal length F of the optical lens, the image height H corresponding to the maximum angle of view of the optical lens, the maximum clear aperture D of the object-side surface S1 of the first lens corresponding to the maximum angle of view of the optical lens, the optical back focus BFL of the optical lens (i.e., the distance on the optical axis from the center of the image-side surface S12 of the sixth lens to the imaging surface IMA), the effective focal length F1 of the first lens, the effective focal length F2 of the second lens, the effective focal length F3 of the third lens, the effective focal length F4 of the fourth lens, the effective focal length F5 of the fifth lens, the effective focal length F6 of the sixth lens, the combined focal length F34 of the third lens and the fourth lens, the n-th lens having the maximum center thickness of the center of the first lens to the sixth lens, and the minimum thickness of the center of the first lens to the sixth lens The central thickness dm of the mirror (n and m are selected from 1, 2, 3, 4, 5 and 6), 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, the radius of curvature R4 of the object-side surface of the second lens, the radius of curvature R5 of the image-side surface of the second lens, the radius of curvature R11 of the object-side surface of the sixth lens, the radius of curvature R12 of the image-side surface of the sixth lens, the distance T12 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 the distance T23 on the optical axis from the center of the image-side surface of the second lens to the center of the object-side surface of the third lens, wherein TTL, BFL, F, D, H, F585, F2, F3, F34, F9, F5, F6, dn, dm, R1, R2, R4, R5, R11, T57346 mm (mm).

TABLE 5

In embodiment 2, the object-side surface and the image-side surface of the first lens L1 and the sixth lens L6 may be aspheric surfaces, and the surface shape x of each aspheric lens may be defined using, but not limited to, formula (1) in embodiment 1. 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 S1, S2, S11 and S12 in example 2 are given in table 6 below.

Flour mark

k

A4

A6

A8

A10

A12

A14

A16

S1

0.5354

-4.3043E-04

-7.8687E-06

2.4293E-07

-1.8111E-08

7.2263E-10

-1.5735E-11

1.4448E-13

S2

0.0993

-4.0613E-04

-1.2234E-05

3.5494E-07

-3.6313E-08

2.1319E-09

-7.4379E-11

1.0856E-12

S11

5.5685

-6.2646E-04

-2.7157E-05

1.0368E-05

-1.4688E-06

1.1383E-07

-5.0001E-09

9.4547E-11

S12

-65.0000

-1.4844E-03

2.1619E-07

-4.0365E-06

4.8698E-07

-3.6368E-08

1.3069E-09

-1.8903E-11

TABLE 6

Example 3

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

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

The third lens L3 is a meniscus lens with positive power, the object-side surface S6 is convex, the image-side surface S7 is concave, and both the object-side surface S6 and the image-side surface S7 of the third lens L3 are spherical.

The fourth lens L4 is a meniscus lens with negative power, the object-side surface S7 is convex, the image-side surface S8 is concave, and both the object-side surface S7 and the image-side surface S8 of the fourth lens L4 are spherical.

The fifth lens L5 is a meniscus lens with positive power, with the object-side surface S9 being convex and the image-side surface S10 being concave, and the object-side surface S9 and the image-side surface S10 of the fifth lens L5 both being spherical.

Table 7 shows the radius of curvature R, thickness d/distance T, refractive index Nd, and dispersion coefficient Vd of each lens of the optical lens of example 3.

TABLE 7

In the present embodiment, the maximum field angle FOV of the optical lens is 34.4 °. Table 8 below shows the total optical length TTL of the optical lens of example 3 (i.e., the distance on the optical axis from the center of the object-side surface S1 of the first lens L1 to the imaging surface IMA), the total effective focal length F of the optical lens, the image height H corresponding to the maximum angle of view of the optical lens, the maximum clear aperture D of the object-side surface S1 of the first lens corresponding to the maximum angle of view of the optical lens, the optical back focus BFL of the optical lens (i.e., the distance on the optical axis from the center of the image-side surface S12 of the sixth lens to the imaging surface IMA), the effective focal length F1 of the first lens, the effective focal length F2 of the second lens, the effective focal length F3 of the third lens, the effective focal length F4 of the fourth lens, the effective focal length F5 of the fifth lens, the effective focal length F6 of the sixth lens, the combined focal length F34 of the third lens and the fourth lens, the n-th lens having the maximum center thickness of the center of the first lens to the sixth lens, and the minimum thickness of the center of the first lens to the sixth lens The central thickness dm of the mirror (n and m are selected from 1, 2, 3, 4, 5 and 6), 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, the radius of curvature R4 of the object-side surface of the second lens, the radius of curvature R5 of the image-side surface of the second lens, the radius of curvature R11 of the object-side surface of the sixth lens, the radius of curvature R12 of the image-side surface of the sixth lens, the distance T12 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 the distance T23 on the optical axis from the center of the image-side surface of the second lens to the center of the object-side surface of the third lens, wherein TTL, BFL, F, D, H, F585, F2, F3, F34, F9, F5, F6, dn, dm, R1, R2, R4, R5, R11, T57346 mm (mm).

TABLE 8

In embodiment 3, the object-side surface and the image-side surface of the first lens L1 and the sixth lens L6 may be aspheric, and the surface shape x of each aspheric lens may be defined using, but not limited to, formula (1) in embodiment 1. 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 S1, S2, S11 and S12 in example 3 are given in table 9 below.

Flour mark

k

A4

A6

A8

A10

A12

A14

A16

S1

0.4720

-3.9642E-04

-6.8454E-06

1.6388E-07

-1.6380E-08

7.7468E-10

-1.9344E-11

1.9608E-13

S2

0.0091

-4.5251E-04

-1.0764E-05

5.3684E-08

-1.6210E-08

1.7853E-09

-9.4409E-11

1.7855E-12

S11

92.4587

-7.0043E-04

-5.2366E-05

1.1117E-05

-1.5560E-06

1.1379E-07

-4.4229E-09

7.0884E-11

S12

19.0000

-7.6623E-04

-1.0038E-05

-3.0697E-06

4.8594E-07

-3.6690E-08

1.3087E-09

-1.7850E-11

TABLE 9

Example 4

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

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

The fifth lens L5 is a meniscus lens with negative power, the object-side surface S9 is convex, the image-side surface S10 is concave, and both the object-side surface S9 and the image-side surface S10 of the fifth lens L5 are spherical.

The sixth lens element L6 is a biconvex lens with positive refractive power, and has a convex object-side surface S11 and a convex image-side surface S12, and both the object-side surface S11 and the image-side surface S12 of the sixth lens element L6 are aspheric.

Optionally, the optical lens may further include an auxiliary lens L7 having no optical power, which has an object side surface S13 and an image side surface S14, and the auxiliary lens L7 may be a filter or a protective glass. Filters may be used to correct for color deviations. The protective glass may be used to protect the image sensing chip at the imaging plane IMA. Light from the object passes through each surface S1 to S14 in sequence and is ultimately imaged onto an imaging plane IMA.

Table 10 shows the radius of curvature R, thickness d/distance T, refractive index Nd, and dispersion coefficient Vd of each lens of the optical lens of example 4.

Watch 10

In the present embodiment, the maximum field angle FOV of the optical lens is 34.4 °. Table 11 below shows the total optical length TTL of the optical lens of example 4 (i.e., the distance on the optical axis from the center of the object-side surface S1 of the first lens L1 to the imaging surface IMA), the total effective focal length F of the optical lens, the image height H corresponding to the maximum angle of view of the optical lens, the maximum clear aperture D of the object-side surface S1 of the first lens corresponding to the maximum angle of view of the optical lens, the optical back focus BFL of the optical lens (i.e., the distance on the optical axis from the center of the image-side surface S12 of the sixth lens to the imaging surface IMA), the effective focal length F1 of the first lens, the effective focal length F2 of the second lens, the effective focal length F3 of the third lens, the effective focal length F4 of the fourth lens, the effective focal length F5 of the fifth lens, the effective focal length F6 of the sixth lens, the combined focal length F34 of the third lens and the fourth lens, the n-th lens having the maximum center thickness of the center of the first lens to the sixth lens, and the minimum thickness of the center of the first lens to the sixth lens The central thickness dm of the mirror (n and m are selected from 1, 2, 3, 4, 5 and 6), 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, the radius of curvature R4 of the object-side surface of the second lens, the radius of curvature R5 of the image-side surface of the second lens, the radius of curvature R11 of the object-side surface of the sixth lens, the radius of curvature R12 of the image-side surface of the sixth lens, the distance T12 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 the distance T23 on the optical axis from the center of the image-side surface of the second lens to the center of the object-side surface of the third lens, wherein TTL, BFL, F, D, H, F585, F2, F3, F34, F9, F5, F6, dn, dm, R1, R2, R4, R5, R11, T57346 mm (mm).

TABLE 11

In embodiment 4, the object-side surface and the image-side surface of the first lens L1 and the sixth lens L6 may be aspheric, and the surface shape x of each aspheric lens may be defined using, but not limited to, formula (1) in embodiment 1. The conical coefficients k and the higher-order term coefficients a4, a6, A8, a10, a12, a14 and a16 that can be used for each of the aspherical mirror surfaces S1, S2, S11 and S12 in example 4 are given in table 12 below.

Flour mark

k

A4

A6

A8

A10

A12

A14

A16

S1

0.4416

-3.5745E-04

-7.5642E-06

1.2150E-07

-1.7915E-08

7.9444E-10

-1.7674E-11

1.5251E-13

S2

0.0171

-4.0553E-04

-1.4006E-05

-2.4000E-07

-2.1668E-08

2.0215E-09

-8.2461E-11

1.1247E-12

S11

9.1480

-2.4660E-04

-6.5536E-05

1.2128E-05

-1.5728E-06

1.1056E-07

-4.2400E-09

6.6503E-11

S12

53.4600

-3.9369E-04

-3.7851E-05

-2.5858E-06

4.8088E-07

-3.7151E-08

1.2726E-09

-1.7310E-11

TABLE 12

Example 5

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

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

The fifth lens L5 is a biconcave lens with negative power, the object-side surface S9 is concave, the image-side surface S10 is concave, and both the object-side surface S9 and the image-side surface S10 of the fifth lens L5 are spherical.

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

In the present embodiment, the third lens L3 and the fourth lens L4 may constitute a cemented lens by cementing.

In the optical lens of the present embodiment, the stop STO may be disposed between the first lens L1 and the second lens L2 to further improve the imaging quality. Table 13 shows the radius of curvature R, thickness d/distance T, refractive index Nd, and dispersion coefficient Vd of each lens of the optical lens of example 5.

Watch 13

In the present embodiment, the maximum field angle FOV of the optical lens is 34.4 °. Table 14 below shows the total optical length TTL of the optical lens of example 5 (i.e., the distance on the optical axis from the center of the object-side surface S1 of the first lens L1 to the imaging surface IMA), the total effective focal length F of the optical lens, the image height H corresponding to the maximum angle of view of the optical lens, the maximum clear aperture D of the object-side surface S1 of the first lens corresponding to the maximum angle of view of the optical lens, the optical back focus BFL of the optical lens (i.e., the distance on the optical axis from the center of the image-side surface S12 of the sixth lens to the imaging surface IMA), the effective focal length F1 of the first lens, the effective focal length F2 of the second lens, the effective focal length F3 of the third lens, the effective focal length F4 of the fourth lens, the effective focal length F5 of the fifth lens, the effective focal length F6 of the sixth lens, the combined focal length F34 of the third lens and the fourth lens, the effective focal length F34 of the nth lens having the maximum center thickness among the first lens to the sixth lens, and the minimum center thickness of the first lens to the sixth lens, and the center thickness of the first lens m to the sixth lens, and the minimum center thickness of the center of the sixth lens The central thickness dm of the mirror (n and m are selected from 1, 2, 3, 4, 5 and 6), 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, the radius of curvature R4 of the object-side surface of the second lens, the radius of curvature R5 of the image-side surface of the second lens, the radius of curvature R11 of the object-side surface of the sixth lens, the radius of curvature R12 of the image-side surface of the sixth lens, the distance T12 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 the distance T23 on the optical axis from the center of the image-side surface of the second lens to the center of the object-side surface of the third lens, wherein TTL, BFL, F, D, H, F585, F2, F3, F34, F9, F5, F6, dn, dm, R1, R2, R4, R5, R11, T57346 mm (mm).

TABLE 14

In embodiment 5, the object-side surface and the image-side surface of the first lens L1 and the sixth lens L6 may be aspheric surfaces, and the surface shape x of each aspheric lens may be defined using, but not limited to, formula (1) in embodiment 1. The following table 15 shows cone coefficients k and high-order term coefficients a4, a6, A8, a10, a12, a14 and a16 which can be used for the respective aspherical mirror surfaces S5, S6, S12 and S13 in example 5.

Flour mark

k

A4

A6

A8

A10

A12

A14

A16

S1

0.3512

-4.7049E-04

-6.4337E-06

1.7940E-07

-1.6325E-08

7.7240E-10

-1.9303E-11

1.9995E-13

S2

0.0117

-5.7257E-04

-8.1465E-06

9.5060E-08

-1.6892E-08

1.8243E-09

-9.0737E-11

1.6707E-12

S11

27.6000

-9.9865E-04

-5.7601E-05

1.1365E-05

-1.5949E-06

1.1295E-07

-4.1684E-09

6.2648E-11

S12

15.7356

-1.0604E-03

-1.3360E-06

-3.8762E-06

4.7713E-07

-3.5643E-08

1.3438E-09

-2.0671E-11

Watch 15

Example 6

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

As shown in fig. 6, the optical lens assembly includes, in order from an object side to an image side: a first lens L1, a second lens L2, a third lens L3, a fourth lens L4, a fifth lens L5, and a sixth lens L6.

The fifth lens L5 is a meniscus lens with positive power, with the object-side surface S9 being concave and the image-side surface S10 being convex, and the object-side surface S9 and the image-side surface S10 of the fifth lens L5 both being spherical.

Table 16 shows a radius of curvature R, a thickness d/a distance T (it is understood that the thickness d/the distance T of the row in which S1 is located is the center thickness d1 of the first lens L1, the thickness d/the distance T of the row in which S2 is the separation distance T12 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 6.

TABLE 16

In the present embodiment, the maximum field angle FOV of the optical lens is 34.4 °. Table 17 below shows the total optical length TTL of the optical lens of example 6 (i.e., the distance on the optical axis from the center of the object-side surface S1 of the first lens L1 to the imaging surface IMA), the total effective focal length F of the optical lens, the image height H corresponding to the maximum angle of view of the optical lens, the maximum clear aperture D of the object-side surface S1 of the first lens corresponding to the maximum angle of view of the optical lens, the optical back focus BFL of the optical lens (i.e., the distance on the optical axis from the center of the image-side surface S12 of the sixth lens to the imaging surface IMA), the effective focal length F1 of the first lens, the effective focal length F2 of the second lens, the effective focal length F3 of the third lens, the effective focal length F4 of the fourth lens, the effective focal length F5 of the fifth lens, the effective focal length F6 of the sixth lens, the combined focal length F34 of the third lens and the fourth lens, the n-th lens having the maximum center thickness of the center of the first lens to the sixth lens, and the minimum thickness of the center of the first lens to the sixth lens The central thickness dm of the mirror (n and m are selected from 1, 2, 3, 4, 5 and 6), 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, the radius of curvature R4 of the object-side surface of the second lens, the radius of curvature R5 of the image-side surface of the second lens, the radius of curvature R11 of the object-side surface of the sixth lens, the radius of curvature R12 of the image-side surface of the sixth lens, the distance T12 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 the distance T23 on the optical axis from the center of the image-side surface of the second lens to the center of the object-side surface of the third lens, wherein TTL, BFL, F, D, H, F585, F2, F3, F34, F9, F5, F6, dn, dm, R1, R2, R4, R5, R11, T57346 mm (mm).

TTL	27.7237	F2	12.7130
				BFL	2.8096	F3	9.8872
F	15.7826	F34	-69.6856
				D	11.0982	F4	-6.9365
H	9.0800	F5	22.8534
				F1	-51.3661	F6	-18.5594
dn	4.9000	dm	0.8001
				R1	7.6386	R2	5.3300
R4	18.1749	R5	-12.4316
				R11	-19.0000	R12	43.0000
T12	3.9290	T23	0.1000

TABLE 17

In embodiment 6, the object-side surface and the image-side surface of the first lens L1 and the sixth lens L6 may be aspheric, and the surface shape x of each aspheric lens may be defined using, but not limited to, formula (1) in embodiment 1. The following table 18 shows cone coefficients k and high-order term coefficients a4, a6, A8, a10, a12, a14 and a16 which can be used for the respective aspherical mirror surfaces S1, S2, S11 and S12 in example 6.

Flour mark

k

A4

A6

A8

A10

A12

A14

A16

S1

0.1267

-5.2202E-04

-1.2438E-05

2.0975E-07

-1.8579E-08

6.9631E-10

-1.6190E-11

1.8620E-13

S2

-0.1874

-7.5270E-04

-2.3750E-05

1.0826E-07

-3.2230E-08

1.9872E-09

-9.4209E-11

1.9800E-12

S11

15.2403

-2.7709E-04

-4.6607E-05

1.3309E-05

-1.6616E-06

1.1520E-07

-4.0710E-09

5.7146E-11

S12

-47.0000

-1.1767E-03

3.1823E-05

-5.4508E-06

5.8925E-07

-3.5910E-08

1.1386E-09

-1.4569E-11

Watch 18

Example 7

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

As shown in fig. 7, the optical lens, in order from an object side to an image side along an optical axis, comprises: a first lens L1, a second lens L2, a third lens L3, a fourth lens L4, a fifth lens L5, and a sixth lens L6.

Table 19 shows the radius of curvature R, thickness d/distance T, refractive index Nd, and dispersion coefficient Vd of each lens of the optical lens of example 7.

Watch 19

In the present embodiment, the maximum field angle FOV of the optical lens is 34.4 °. Table 20 below shows the total optical length TTL of the optical lens of example 7 (i.e., the distance on the optical axis from the center of the object-side surface S1 of the first lens L1 to the imaging surface IMA), the total effective focal length F of the optical lens, the image height H corresponding to the maximum angle of view of the optical lens, the maximum clear aperture D of the object-side surface S1 of the first lens corresponding to the maximum angle of view of the optical lens, the optical back focus BFL of the optical lens (i.e., the distance on the optical axis from the center of the image-side surface S12 of the sixth lens to the imaging surface IMA), the effective focal length F1 of the first lens, the effective focal length F2 of the second lens, the effective focal length F3 of the third lens, the effective focal length F4 of the fourth lens, the effective focal length F5 of the fifth lens, the effective focal length F6 of the sixth lens, the combined focal length F34 of the third lens and the fourth lens, the n-th lens having the maximum center thickness of the center of the first lens to the sixth lens, and the minimum center thickness of the first lens to the center of the sixth lens The central thickness dm of the mirror (n and m are selected from 1, 2, 3, 4, 5 and 6), 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, the radius of curvature R4 of the object-side surface of the second lens, the radius of curvature R5 of the image-side surface of the second lens, the radius of curvature R11 of the object-side surface of the sixth lens, the radius of curvature R12 of the image-side surface of the sixth lens, the distance T12 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 the distance T23 on the optical axis from the center of the image-side surface of the second lens to the center of the object-side surface of the third lens, wherein TTL, BFL, F, D, H, F585, F2, F3, F34, F9, F5, F6, dn, dm, R1, R2, R4, R5, R11, T57346 mm (mm).

TTL	27.0461	F2	12.4411
				BFL	2.8792	F3	10.0649
F	15.1878	F34	-38.1336
				D	10.5164	F4	-6.2811
H	9.1780	F5	20.9698
				F1	-48.5578	F6	-24.0728
dn	5.5000	dm	1.2435
				R1	10.2189	R2	6.8017
R4	16.5722	R5	-12.6369
				R11	-11.1485	R12	-87.0000
T12	3.3825	T23	0.3212

Watch 20

In embodiment 7, the object-side surface and the image-side surface of the first lens L1 and the sixth lens L6 may be aspheric, and the surface shape x of each aspheric lens may be defined using, but not limited to, formula (1) in embodiment 1. The following table 21 shows cone coefficients k and high-order term coefficients a4, a6, A8, a10, a12, a14 and a16 which can be used for the respective aspherical mirror surfaces S1, S2, S11 and S12 in example 7.

Flour mark

k

A4

A6

A8

A10

A12

A14

A16

S1

0.5384

-4.3045E-04

-7.8697E-06

2.4290E-07

-1.8111E-08

7.2269E-10

-1.5730E-11

1.4476E-13

S2

0.0300

-4.8055E-04

-1.2229E-05

3.5519E-07

-3.6304E-08

2.1320E-09

-7.4389E-11

1.0840E-12

S11

6.0001

-6.2638E-04

-2.7273E-05

1.0361E-05

-1.4692E-06

1.1382E-07

-4.9992E-09

9.4744E-11

S12

-39.0000

-1.4847E-03

2.4753E-07

-4.0365E-06

4.8698E-07

-3.6368E-08

1.3069E-09

-1.8903E-11

TABLE 21

Example 8

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

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

The first lens L1 is a meniscus lens with negative power, the object-side surface S1 is convex, the image-side surface S2 is concave, and both the object-side surface S1 and the image-side surface S2 of the first lens L1 are aspheric.

Table 22 shows the radius of curvature R, thickness d/distance T, refractive index Nd, and dispersion coefficient Vd of each lens of the optical lens of example 8.

TABLE 22

In the present embodiment, the maximum field angle FOV of the optical lens is 34.4 °. Table 23 below shows the total optical length TTL of the optical lens of example 8 (i.e., the distance on the optical axis from the center of the object-side surface S1 of the first lens L1 to the imaging surface IMA), the total effective focal length F of the optical lens, the image height H corresponding to the maximum angle of view of the optical lens, the maximum clear aperture D of the object-side surface S1 of the first lens corresponding to the maximum angle of view of the optical lens, the optical back focus BFL of the optical lens (i.e., the distance on the optical axis from the center of the image-side surface S12 of the sixth lens to the imaging surface IMA), the effective focal length F1 of the first lens, the effective focal length F2 of the second lens, the effective focal length F3 of the third lens, the effective focal length F4 of the fourth lens, the effective focal length F5 of the fifth lens, the effective focal length F6 of the sixth lens, the combined focal length F34 of the third lens and the fourth lens, the n-th lens having the maximum center thickness of the center of the first lens to the sixth lens, and the minimum thickness of the center of the first lens to the sixth lens The central thickness dm of the mirror (n and m are selected from 1, 2, 3, 4, 5 and 6), 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, the radius of curvature R4 of the object-side surface of the second lens, the radius of curvature R5 of the image-side surface of the second lens, the radius of curvature R11 of the object-side surface of the sixth lens, the radius of curvature R12 of the image-side surface of the sixth lens, the distance T12 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 the distance T23 on the optical axis from the center of the image-side surface of the second lens to the center of the object-side surface of the third lens, wherein TTL, BFL, F, D, H, F585, F2, F3, F34, F9, F5, F6, dn, dm, R1, R2, R4, R5, R11, T57346 mm (mm).

TTL	26.3934	F2	12.3897
				BFL	2.9584	F3	12.0251
F	15.3451	F34	-98.4218
				D	10.3330	F4	-8.9323
H	9.1680	F5	90.2734
				F1	-55.0743	F6	-30.8006
dn	5.3700	dm	0.6500
				R1	10.1194	R2	6.8347
R4	16.4150	R5	-12.5814
				R11	-97.2648	R12	27.6414
T12	2.9251	T23	0.1000

TABLE 23

In embodiment 8, the object-side surface and the image-side surface of the first lens L1 and the sixth lens L6 may be aspheric, and the surface shape x of each aspheric lens may be defined using, but not limited to, formula (1) in embodiment 1. The following table 24 shows cone coefficients k and high-order term coefficients a4, a6, A8, a10, a12, a14 and a16 which can be used for the respective aspherical mirror surfaces S1, S2, S11 and S12 in example 8.

Flour mark

k

A4

A6

A8

A10

A12

A14

A16

S1

0.4720

-3.9641E-04

-6.8467E-06

1.6379E-07

-1.6384E-08

7.7458E-10

-1.9343E-11

1.9639E-13

S2

0.0092

-4.6520E-04

-1.0758E-05

5.4269E-08

-1.6198E-08

1.7852E-09

-9.4469E-11

1.7782E-12

S11

37.2400

-7.0097E-04

-5.2435E-05

1.1114E-05

-1.5560E-06

1.1380E-07

-4.4214E-09

7.1034E-11

S12

24.1600

-7.6730E-04

-1.0950E-05

-3.0590E-06

4.8609E-07

-3.6685E-08

1.3088E-09

-1.7854E-11

Watch 24

Example 9

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

As shown in fig. 9, the optical lens, in order from an object side to an image side along an optical axis, comprises: a first lens L1, a second lens L2, a third lens L3, a fourth lens L4, a fifth lens L5, and a sixth lens L6.

Table 25 shows the radius of curvature R, thickness d/distance T, refractive index Nd, and dispersion coefficient Vd of each lens of the optical lens of example 9.

TABLE 25

In the present embodiment, the maximum field angle FOV of the optical lens is 34.4 °. Table 26 below shows the total optical length TTL of the optical lens of example 9 (i.e., the distance on the optical axis from the center of the object-side surface S1 of the first lens L1 to the imaging surface IMA), the total effective focal length F of the optical lens, the image height H corresponding to the maximum angle of view of the optical lens, the maximum clear aperture D of the object-side surface S1 of the first lens corresponding to the maximum angle of view of the optical lens, the optical back focus BFL of the optical lens (i.e., the distance on the optical axis from the center of the image-side surface S12 of the sixth lens to the imaging surface IMA), the effective focal length F1 of the first lens, the effective focal length F2 of the second lens, the effective focal length F3 of the third lens, the effective focal length F4 of the fourth lens, the effective focal length F5 of the fifth lens, the effective focal length F6 of the sixth lens, the combined focal length F34 of the third lens and the fourth lens, the effective focal length F34 of the nth lens having the maximum center thickness among the first lens to the sixth lens, and the minimum center thickness of the first lens to the sixth lens, and the center thickness of the first lens, m to the sixth lens, and the minimum center thickness of the center of the sixth lens Central thickness of mirror dm (n and m are selected from 1, 2, 3, 4, 5 and 6), curvature of object side of first lens

A power radius R1, a curvature radius R2 of an image side surface of the first lens, a curvature radius R4 of an object side surface of the second lens, a curvature radius R5 of an image side surface of the second lens, a curvature radius R11 of an object side surface of the sixth lens, a curvature radius R12 of an image side surface of the sixth lens, a distance T12 from a center of an image side surface of the first lens to a center of an object side surface of the second lens on an optical axis, and a distance T23 from a center of an image side surface of the second lens to a center of an object side surface of the third lens on an optical axis, wherein units of TTL, BFL, F, D, H, F1, F2, F3, F34, F4, F5, F6, dn, dm, R1, R2, R4, R5, R11, R12, T12 and T23 are all millimeters (mm).

TTL	26.9901	F2	12.5100
				BFL	2.9583	F3	10.4804
F	15.4696	F34	-34.1433
				D	11.1336	F4	-6.3081
H	9.2640	F5	-55.3320
				F1	-52.6634	F6	23.2236
dn	3.5000	dm	1.0444
				R1	9.1857	R2	6.1027
R4	20.4655	R5	-11.6325
				R11	19.2400	R12	-91.8740
T12	4.2505	T23	0.8672

Watch 26

In example 9, the object-side surface and the image-side surface of the first lens L1 and the sixth lens L6 may be aspheric, and the surface shape x of each aspheric lens may be defined using, but not limited to, formula (1) in example 1. The following table 27 shows cone coefficients k and high-order term coefficients a4, a6, A8, a10, a12, a14 and a16 which can be used for the respective aspherical mirror surfaces S1, S2, S11 and S12 in example 9.

Flour mark

k

A4

A6

A8

A10

A12

A14

A16

S1

0.4439

-3.5097E-04

-7.5559E-06

1.2567E-07

-1.8016E-08

7.9356E-10

-1.7574E-11

1.5097E-13

S2

0.0198

-3.9310E-04

-1.3883E-05

-2.3713E-07

-2.1770E-08

2.0205E-09

-8.2213E-11

1.1190E-12

S11

6.8516

-2.4580E-04

-6.9897E-05

1.2340E-05

-1.5734E-06

1.1035E-07

-4.2331E-09

6.6006E-11

S12

56.3900

-3.9704E-04

-3.9363E-05

-2.6572E-06

4.8251E-07

-3.7000E-08

1.2697E-09

-1.7742E-11

Watch 27

Example 10

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

As shown in fig. 10, the optical lens, in order from an object side to an image side along an optical axis, comprises: a first lens L1, a second lens L2, a third lens L3, a fourth lens L4, a fifth lens L5, and a sixth lens L6.

In the optical lens of the present embodiment, the stop STO may be disposed between the first lens L1 and the second lens L2 to further improve the imaging quality. Table 28 shows the radius of curvature R, thickness d/distance T, refractive index Nd, and dispersion coefficient Vd of each lens of the optical lens of example 10.

Watch 28

In the present embodiment, the maximum field angle FOV of the optical lens is 34.4 °. Table 29 below shows the total optical length TTL of the optical lens of example 10 (i.e., the distance on the optical axis from the center of the object-side surface S1 of the first lens L1 to the imaging surface IMA), the total effective focal length F of the optical lens, the image height H corresponding to the maximum angle of view of the optical lens, the maximum clear aperture D of the object-side surface S1 of the first lens corresponding to the maximum angle of view of the optical lens, the optical back focus BFL of the optical lens (i.e., the distance on the optical axis from the center of the image-side surface S12 of the sixth lens to the imaging surface IMA), the effective focal length F1 of the first lens, the effective focal length F2 of the second lens, the effective focal length F3 of the third lens, the effective focal length F4 of the fourth lens, the effective focal length F5 of the fifth lens, the effective focal length F6 of the sixth lens, the combined focal length F34 of the third lens and the fourth lens, the n-th lens having the maximum center thickness of the center of the first lens to the sixth lens, and the minimum thickness of the center of the first lens to the sixth lens The central thickness dm of the mirror (n and m are selected from 1, 2, 3, 4, 5 and 6), 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, the radius of curvature R4 of the object-side surface of the second lens, the radius of curvature R5 of the image-side surface of the second lens, the radius of curvature R11 of the object-side surface of the sixth lens, the radius of curvature R12 of the image-side surface of the sixth lens, the distance T12 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 the distance T23 on the optical axis from the center of the image-side surface of the second lens to the center of the object-side surface of the third lens, wherein TTL, BFL, F, D, H, F585, F2, F3, F34, F9, F5, F6, dn, dm, R1, R2, R4, R5, R11, T57346 mm (mm).

TTL	26.9753	F2	12.2360
				BFL	2.9590	F3	12.9536
F	15.4137	F34	-1081.4440
				D	10.1074	F4	-10.7573
H	9.1300	F5	-54.0158
				F1	-51.9133	F6	-53.3581
dn	5.9732	dm	0.7863
				R1	10.8071	R2	7.1696
R4	17.0235	R5	-11.8032
				R11	47.6500	R12	20.0600
T12	2.6293	T23	0.1000

Watch 29

In embodiment 10, the object-side surface and the image-side surface of the first lens L1 and the sixth lens L6 may be aspheric, and the surface shape x of each aspheric lens may be defined using, but not limited to, formula (1) in embodiment 1. The following table 30 shows cone coefficients k and high-order term coefficients a4, a6, A8, a10, a12, a14 and a16 which can be used for the respective aspherical mirror surfaces S5, S6, S12 and S13 in example 10.

Flour mark

k

A4

A6

A8

A10

A12

A14

A16

S1

0.3509

-4.7050E-04

-6.4395E-06

1.7900E-07

-1.6344E-08

7.7177E-10

-1.9314E-11

2.0045E-13

S2

0.0121

-5.7241E-04

-8.1337E-06

9.5566E-08

-1.6893E-08

1.8220E-09

-9.1014E-11

1.6454E-12

S11

72.3500

-9.9847E-04

-5.7684E-05

1.3602E-05

-1.5950E-06

1.1296E-07

-4.1678E-09

6.2661E-11

S12

15.7175

-1.0594E-03

-1.0666E-06

-3.8631E-06

4.7751E-07

-3.5641E-08

1.3430E-09

-2.0737E-11

Watch 30

Example 11

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

As shown in fig. 11, the optical lens, in order from an object side to an image side along an optical axis, comprises: a first lens L1, a second lens L2, a third lens L3, a fourth lens L4, a fifth lens L5, and a sixth lens L6.

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

Table 31 shows the radius of curvature R, thickness d/distance T, refractive index Nd, and dispersion coefficient Vd of each lens of the optical lens of example 11.

Watch 31

In the present embodiment, the maximum field angle FOV of the optical lens is 34.4 °. Table 32 below shows total optical length TTL of the optical lens of example 11 (i.e., the distance on the optical axis from the center of the object-side surface S1 of the first lens L1 to the imaging surface IMA), total effective focal length F of the optical lens, image height H corresponding to the maximum angle of view of the optical lens, maximum clear aperture D of the object-side surface S1 of the first lens corresponding to the maximum angle of view of the optical lens, optical back focus BFL of the optical lens (i.e., the distance on the optical axis from the center of the image-side surface S12 of the sixth lens to the imaging surface IMA), effective focal length F1 of the first lens, effective focal length F2 of the second lens, effective focal length F3 of the third lens, effective focal length F4 of the fourth lens, effective focal length F5 of the fifth lens, effective focal length F6 of the sixth lens, combined focal length F34 of the third lens and the fourth lens, effective focal length F34 of the nth lens having the maximum center thickness among the first lens to sixth lens, and the minimum center thickness dn of the first lens to the sixth lens The central thickness dm of the mirror (n and m are selected from 1, 2, 3, 4, 5 and 6), 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, the radius of curvature R4 of the object-side surface of the second lens, the radius of curvature R5 of the image-side surface of the second lens, the radius of curvature R11 of the object-side surface of the sixth lens, the radius of curvature R12 of the image-side surface of the sixth lens, the distance T12 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 the distance T23 on the optical axis from the center of the image-side surface of the second lens to the center of the object-side surface of the third lens, wherein TTL, BFL, F, D, H, F585, F2, F3, F34, F9, F5, F6, dn, dm, R1, R2, R4, R5, R11, T57346 mm (mm).

TTL	27.0087	F2	12.7174
				BFL	2.9671	F3	11.4396
F	15.3157	F34	-31.9713
				D	10.7880	F4	-6.7528
H	9.1840	F5	-146.7553
				F1	-65.5494	F6	40.7441
dn	4.4374	dm	0.6500
				R1	11.8717	R2	7.9637
R4	20.1187	R5	-11.8311
				R11	18.2130	R12	49.3472
T12	3.2841	T23	0.1000

Watch 32

In example 11, the object-side surface and the image-side surface of the first lens L1 and the sixth lens L6 may be aspheric, and the surface shape x of each aspheric lens may be defined using, but not limited to, formula (1) in example 1. The following table 33 shows cone coefficients k and high-order term coefficients a4, a6, A8, a10, a12, a14 and a16 which can be used for the respective aspherical mirror surfaces S1, S2, S11 and S12 in example 11.

Flour mark

k

A

B

C

D

E

G

H

S1

0.7855

-2.5454E-04

-6.6910E-06

2.8135E-07

-2.0330E-08

7.1006E-10

-1.3141E-11

1.0063E-13

S2

0.2450

-1.7975E-04

-1.1158E-05

5.5268E-07

-4.4839E-08

1.6175E-09

-2.8036E-11

1.9665E-13

S11

-75.1240

9.8514E-04

-1.4020E-04

1.9371E-05

-1.7739E-06

9.5062E-08

-2.6477E-09

3.0950E-11

S12

15.2400

-2.7411E-04

-8.1705E-05

4.4540E-06

5.7114E-08

-2.7634E-08

1.4212E-09

-2.2543E-11

Watch 33

Example 12

An optical lens according to embodiment 12 of the present application is described below with reference to fig. 12. Fig. 12 is a schematic view showing a structure of an optical lens according to embodiment 12 of the present application.

As shown in fig. 12, the optical lens, in order from an object side to an image side along an optical axis, comprises: a first lens L1, a second lens L2, a third lens L3, a fourth lens L4, a fifth lens L5, and a sixth lens L6.

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

Table 34 shows the radius of curvature R, thickness d/distance T, refractive index Nd, and dispersion coefficient Vd of each lens of the optical lens of example 12.

Watch 34

In the present embodiment, the maximum field angle FOV of the optical lens is 34.4 °. Table 35 below shows total optical length TTL of the optical lens of example 12 (i.e., the distance on the optical axis from the center of the object-side surface S1 of the first lens L1 to the imaging surface IMA), total effective focal length F of the optical lens, image height H corresponding to the maximum angle of view of the optical lens, maximum clear aperture D of the object-side surface S1 of the first lens corresponding to the maximum angle of view of the optical lens, optical back focus BFL of the optical lens (i.e., the distance on the optical axis from the center of the image-side surface S12 of the sixth lens to the imaging surface IMA), effective focal length F1 of the first lens, effective focal length F2 of the second lens, effective focal length F3 of the third lens, effective focal length F4 of the fourth lens, effective focal length F5 of the fifth lens, effective focal length F6 of the sixth lens, combined focal length F34 of the third lens and the fourth lens, effective focal length F34 of the nth lens having the maximum center thickness among the first lens to sixth lens, and the minimum center thickness dn of the first lens to the sixth lens The central thickness dm of the mirror (n and m are selected from 1, 2, 3, 4, 5 and 6), 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, the radius of curvature R4 of the object-side surface of the second lens, the radius of curvature R5 of the image-side surface of the second lens, the radius of curvature R11 of the object-side surface of the sixth lens, the radius of curvature R12 of the image-side surface of the sixth lens, the distance T12 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 the distance T23 on the optical axis from the center of the image-side surface of the second lens to the center of the object-side surface of the third lens, wherein TTL, BFL, F, D, H, F585, F2, F3, F34, F9, F5, F6, dn, dm, R1, R2, R4, R5, R11, T57346 mm (mm).

TTL	27.8277	F2	12.5463
				BFL	2.9583	F3	9.8255
F	15.3836	F34	-41.6593
				D	11.0576	F4	-6.0770
H	9.1540	F5	99.0471
				F1	-45.2364	F6	86.1850
dn	3.9855	dm	0.7000
				R1	9.5373	R2	5.9912
R4	20.6651	R5	-11.5335
				R11	-50.1237	R12	-27.9422
T12	4.2425	T23	0.1000

Watch 35

In example 12, the object-side surface and the image-side surface of the first lens L1 and the sixth lens L6 may be aspheric, and the surface shape x of each aspheric lens may be defined using, but not limited to, formula (1) in example 1. The following table 36 shows cone coefficients k and high-order term coefficients a4, a6, A8, a10, a12, a14 and a16 which can be used for the respective aspherical mirror surfaces S1, S2, S11 and S12 in example 12.

Flour mark

k

A4

A6

A8

A10

A12

A14

A16

S1

-0.1494

-2.7898E-04

-5.8694E-06

8.8219E-08

-7.6021E-09

2.5787E-10

-4.5717E-12

3.3982E-14

S2

-0.4720

-2.3072E-04

-1.0775E-05

1.3498E-07

-1.4579E-08

6.8141E-10

-1.5809E-11

1.8054E-13

S11

16.3400

-3.4894E-04

-2.4693E-05

1.0496E-06

4.5202E-08

-2.8387E-08

2.1747E-09

-5.9618E-11

S12

9.7214

-1.6932E-04

-1.0257E-04

1.1059E-05

-8.4665E-07

3.6275E-08

-8.2813E-10

7.5806E-12

Watch 36

In summary, examples 1 to 12 satisfy the relationships shown in tables 37-1 and 37-2. In tables 37-1 and 37-2, units of TTL, BFL, F, D, H, F1, F2, F3, F4, F5, F6, F34, R1, R2, R4, R5, R11, R12, T12, dn, dm, and T23 are millimeters (mm), and units of FOV are degrees (°).

TABLE 37-1

Conditions/examples	7	8	9	10	11	12
							TTL/F	1.8	1.7	1.7	1.8	1.8	1.8
BFL/TTL	0.11	0.11	0.11	0.11	0.11	0.11
							D/H/FOV	0.033	0.033	0.035	0.032	0.034	0.035
\|F3/F4\|	1.6	1.3	1.7	1.2	1.7	1.6
							\|F1/F\|	3.2	3.6	3.4	3.4	4.3	2.9
dn/dm	4.4	8.3	3.4	7.6	6.8	5.7
							\|F1/F2\|	3.9	4.4	4.2	4.2	5.2	3.6
\|(R4-R5)/(R4+R5)\|	7.4	7.6	3.6	5.5	3.9	3.5
							\|F34/F\|	2.5	6.4	2.2	70	2.1	2.7
\|R1/R2\|	1.5	1.5	1.5	1.5	1.5	1.6
							\|R11/R12\|	0.13	3.5	0.21	2.4	0.37	1.8
T12/TTL	0.13	0.11	0.16	0.10	0.12	0.15
							T23/TTL	0.012	0.0038	0.032	0.0037	0.0037	0.0036
\|F2/F\|	0.82	0.81	0.81	0.79	0.83	0.82
							\|F3/F\|	0.66	0.78	0.68	0.84	0.75	0.64
\|F4/F\|	0.41	0.58	0.41	0.70	0.44	0.40
							\|F5/F\|	1.4	5.9	3.6	3.5	9.6	6.4
\|F/R1\|	1.5	1.5	1.7	1.4	1.3	1.6
							TTL/H/FOV	0.086	0.084	0.085	0.086	0.086	0.088

TABLE 37-2

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

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

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

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

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

a fifth lens having optical power; and

a sixth lens having optical power.

2. An optical lens barrel according to claim 1, wherein a distance TTL between a center of an object side surface of the first lens element and an image plane of the optical lens on the optical axis and a total effective focal length F of the optical lens satisfy:

TTL/F≤3.5。

3. an optical lens barrel according to claim 1, wherein 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 the optical axis and a distance BFL between a center of an image side surface of the sixth lens element and the imaging surface on the optical axis satisfy:

BFL/TTL≥0.07。

4. the optical lens according to claim 1, wherein the maximum field angle FOV of the optical lens, the maximum clear aperture D of the object-side surface of the first lens corresponding to the maximum field angle of the optical lens, and the image height H corresponding to the maximum field angle of the optical lens satisfy:

D/H/FOV≤0.1。

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

0.5≤|F3/F4|≤2.3。

6. an optical lens according to claim 1, characterized in that the effective focal length F1 of the first lens and the total effective focal length F of the optical lens satisfy:

|F1/F|≥2.5。

7. an optical lens as claimed in claim 1, characterized in that the total effective focal length F of the optical lens and the radius of curvature R1 of the object side of the first lens satisfy:

0.5≤|F/R1|≤2.5。

8. an optical lens as claimed in claim 1, characterized in that the effective focal length F1 of the first lens and the effective focal length F2 of the second lens satisfy:

|F1/F2|≥2.5。

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

a first lens having a negative optical power;

a second lens having a positive optical power;

a third lens having a positive optical power;

a fourth lens having a negative optical power;

a fifth lens having optical power; and

a sixth lens having an optical power,

wherein, a distance T12 between the center of the image side surface of the first lens element and the center of the object side surface of the second lens element on the optical axis and a distance TTL between the center of the object side surface of the first lens element and the imaging surface of the optical lens element on the optical axis satisfy:

T12/TTL≥0.08。

10. an electronic apparatus, characterized by comprising the optical lens according to claim 1 or 35 and an imaging element for converting an optical image formed by the optical lens into an electrical signal.