CN114594568A

CN114594568A - Optical lens and electronic device

Info

Publication number: CN114594568A
Application number: CN202011416891.0A
Authority: CN
Inventors: 李响; 王东方; 姚波
Original assignee: Ningbo Sunny Automotive Optech Co Ltd
Current assignee: Ningbo Sunny Automotive Optech Co Ltd
Priority date: 2020-12-07
Filing date: 2020-12-07
Publication date: 2022-06-07
Anticipated expiration: 2040-12-07
Also published as: CN114594568B

Abstract

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

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

Owing to the rapid development of the car assistant driving system in recent years, the optical lens is widely applied to applications such as a car-mounted reversing visual system, a driving recorder, an automatic parking system, a road finding system and the like as an important component of the car assistant driving system.

The sensor of the optical lens plays an important role in the driving assistance system. The sensor of the optical lens has two advantages compared with other types of sensors in the working mode of acquiring the surrounding environment information: the manufacturing cost of the sensor of the optical lens is low due to the mature technology of the vehicle-mounted lens; the sensor of the optical lens can obtain the most comprehensive information through a small data volume.

With the increasing use of optical lenses (interior lenses) in vehicle monitoring, the interior lenses are generally required to have a small front end diameter to avoid affecting the appearance of the vehicle occupant, and further, to be as compact as possible. In the future, the mainstream trend requires that the inner view lens can simultaneously apply visible light (RGB) and infrared light (IR). The optical lens may use visible light to distinguish colors in a daytime mode; infrared light may be used in the night mode. Further, the optical lens may also capture infrared light as part of an algorithm to produce excellent daytime color images and video.

Therefore, how to make an optical lens have the characteristics of large field of view, miniaturization, low cost, good stability, low sensitivity, and the like, and simultaneously realize the confocal use of visible light and infrared light, and the ability of being used both day and night is one of the problems to be solved by many current lens designs.

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; a second lens having a negative refractive power, the object side surface of which is concave; a third lens having a positive refractive power, an object-side surface of which is convex; the fourth lens with positive focal power has a convex object-side surface and a convex image-side surface; a fifth lens element with negative refractive power, the object-side surface of which is concave and the image-side surface of which is concave; and a sixth lens with positive focal power, wherein the object side surface of the sixth lens is a convex surface, and the image side surface of the sixth lens is a concave surface.

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

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

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

In one embodiment, at least four of the first to sixth lenses may be aspherical 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 7.

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 0.05.

In one embodiment, the maximum field angle FOV of the optical lens, the maximum clear aperture D of the object-side surface of the first lens corresponding to the maximum field angle of the optical lens, and the image height H corresponding to the maximum field angle of the optical lens may satisfy: D/H/FOV is less than or equal to 0.08.

In one embodiment, the F-number FNO of the optical lens and the total effective focal length F of the optical lens may satisfy: F/FNO is not less than 0.5.

In one embodiment, the effective focal length F6 of the sixth lens and the total effective focal length F of the optical lens may satisfy: and | F6/F | ≧ 2.

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 absolute value of F2/F is more than or equal to 1.0 and less than or equal to 10.

In one embodiment, the effective focal length F4 of the fourth lens and the effective focal length F5 of the fifth lens may satisfy: the absolute value of F4/F5 is more than or equal to 0.3 and less than or equal to 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 0.5.

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 may satisfy: dn/dm < 7, wherein n and m are selected from 1, 2, 3, 4, 5 and 6.

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

In one embodiment, the combined focal length F45 of the fourth and fifth lenses and the total effective focal length F of the optical lens may satisfy: and the | F45/F | is more than or equal to 0.5.

In one embodiment, the radius of curvature R2 of the image-side surface of the first lens and the radius of curvature R3 of the object-side surface of the second lens may satisfy: the ratio of (R2-R3)/(R2+ R3) is more than or equal to-50 and less than or equal to 200.

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 2.

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 element and the center of the object-side surface of the third 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 optical axis of the imaging surface of the optical lens may satisfy: T23/TTL is less than or equal to 0.1.

In one embodiment, the central thickness d3 of the third lens and the distance TTL between the center of the object-side surface of the first lens and the imaging surface of the optical lens on the optical axis can satisfy: d3/TTL is more than or equal to 0.1.

In one embodiment, a distance T56 between the center of the image-side surface of the fifth lens element and the center of the object-side surface of the sixth 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 optical axis of the image plane of the optical lens may satisfy: T56/TTL is less than or equal to 0.1.

In one embodiment, an edge slope K (S2) at a maximum field angle of the image-side surface of the first lens may satisfy: arctan (1/K (S2)) > 35.

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 negative optical power; a third lens having a positive optical power; a fourth lens having a positive optical power; a fifth lens having a negative optical power; and a sixth lens having positive focal power, wherein an F-number FNO of the optical lens and a total effective focal length F of the optical lens may satisfy: F/FNO is not less than 0.5.

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

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

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

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

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

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

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

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

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

In one embodiment, a distance T56 between the center of the image-side surface of the fifth lens element and the center of the object-side surface of the sixth 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 may satisfy: T56/TTL is less than or equal to 0.1.

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

The optical lens has the advantages that the six lenses are adopted, the shape and focal power of each lens are optimized, the cemented lens is formed, and the like, so that the optical lens has at least one beneficial effect of high resolution (more than two million pixels), low cost, miniaturization, small front-end caliber, confocal visible light and infrared light, 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 structural view showing 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;

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

fig. 13 is a schematic view showing a structure of an optical lens according to embodiment 13 of the present application.

Detailed Description

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

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

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

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

It will be further understood that the terms "comprises," "comprising," "has," "having," "includes" and/or "including," when used in this specification, specify the presence of stated features, elements, and/or components, but do not preclude the presence or addition of one or more other features, elements, components, and/or groups thereof. Moreover, when a statement such as "at least one of" appears after a list of listed features, the entirety of the listed features is modified rather than modifying individual elements in the list. Furthermore, when describing embodiments of the present application, the use of "may" mean "one or more embodiments of the present application. Also, the term "exemplary" is intended to refer to an example or illustration.

Unless otherwise defined, all terms (including technical and scientific terms) used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. It will be further understood that terms, such as those defined in commonly used dictionaries, should be interpreted as having a meaning that is consistent with their meaning in the context of the relevant art and will not be interpreted in an idealized or overly formal sense unless expressly so defined herein.

It should be noted that the embodiments and features of the embodiments in the present application may be combined with each other without conflict. The present application will be described in detail below with reference to the embodiments with reference to the attached drawings.

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

An optical lens according to an exemplary embodiment of the present application may include 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 may have a negative power, and the first lens may have a convex-concave type. The focal power and the surface type of the first lens can make the light entering the optical system diverge, thereby being beneficial to the smooth transition of the light to the rear part of the optical system; moreover, the light rays with a large field of view can be collected as far as possible and enter the optical system, so that the illumination of the optical lens is effectively improved; in addition, the optical path of light behind the optical system is reduced, and the total optical length is shortened while the luminous flux of the optical lens is increased.

In an exemplary embodiment, the second lens may have a negative power, and the second lens may have a concave-concave type or a convex-concave type. The arrangement of the focal power and the surface shape of the second lens can ensure that the light rays diffused by the first lens smoothly enter the back of the optical system; the method is favorable for correcting the high-level aberration of the optical lens and reducing the attenuation degree of the relative illumination of the optical lens.

In an exemplary embodiment, the third lens may have a positive optical power, and the third lens may have a convex-convex type or a convex-concave type. The focal power and the surface type of the third lens are arranged, so that light convergence is facilitated, and the diffused light can smoothly enter the rear part of the optical system; the third lens has positive focal power, which is beneficial to compensating spherical aberration introduced by the front two lenses and correcting aberration generated by the front lens; the optical system is also beneficial to converging light rays, increasing the aperture of the optical lens and shortening the total optical length of the optical lens, so that the optical system is more compact and has shorter total lens length.

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 fourth lens and the fifth lens may be combined into a cemented lens by cementing the image-side surface of the fourth lens with the object-side surface of the fifth lens. The fourth lens with positive focal power and the object side surface and the image side surface both being convex surfaces is glued with the fifth lens with negative focal power and the object side surface and the image side surface both being concave surfaces, so that light rays emitted by the front lens can be smoothly transited to the rear optical system, the compact structure of the optical lens is facilitated, the size of the optical lens is reduced, various aberrations of the optical lens are facilitated to be corrected, the matching sensitivity of each lens is reduced, the resolution is improved, and the optical performances such as distortion, CRA and the like are optimized. Of course, the fourth lens and the fifth lens may not be cemented, which is advantageous for improving the resolution.

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

By using the adhesive, the whole chromatic aberration correction of the sharing optical system is facilitated, so that the aberration can be effectively corrected, and the resolving power 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 sixth lens may have a positive optical power, and the sixth lens may have a convex-concave type. The curvature radius values of the object side surface and the image side surface of the sixth lens are approximate, so that the forward light can smoothly enter an imaging surface, and the resolution of the optical lens is improved. In particular, at least one of the object side surface and the image side surface of the sixth lens may be arranged as an aspheric mirror surface to further improve the resolution quality of the lens. In addition, the shape of the sixth lens can be set to be approximately flat, that is, the focal power of the sixth lens is approximately 0, so that the resolution quality of the lens can be further improved.

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 7. For example, TTL/F ≦ 6.5. 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 0.05. For example, BFL/TTL ≧ 0.1. The ratio of the optical back focus of the optical lens to the optical total length of the optical lens is controlled within a reasonable numerical range, so that 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.

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 0.08. For example, D/H/FOV ≦ 0.05. The maximum field angle of the optical lens, the maximum light-transmitting caliber 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 F-number FNO of the optical lens and the total effective focal length F of the optical lens may satisfy: F/FNO is not less than 0.5. For example, F/FNO.gtoreq.0.55. The ratio of the diaphragm number of the optical lens to the total effective focal length of the optical lens is controlled within a reasonable numerical range, so that the optical lens can be ensured to have a large diaphragm.

In an exemplary embodiment, the effective focal length F6 of the sixth lens and the total effective focal length F of the optical lens may satisfy: and | F6/F | ≧ 2. For example, | F6/F | ≧ 2.1. The mutual relation between the effective focal length of the sixth lens and the total effective focal length of the optical lens is reasonably controlled, and the resolution of the optical lens is improved.

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 absolute value of F2/F is more than or equal to 1.0 and less than or equal to 10. For example, 1.5 ≦ F2/F ≦ 8. By controlling the ratio of the effective focal length of the second lens to the total effective focal length of the optical lens within a reasonable range of values, it is helpful to balance various aberrations in the optical system.

In an exemplary embodiment, the effective focal length F4 of the fourth lens and the effective focal length F5 of the fifth lens may satisfy: the absolute value of F5/F4 is more than or equal to 0.3 and less than or equal to 3. For example, 0.4. ltoreq. F5/F4. ltoreq.2.5. By controlling the ratio of the effective focal lengths of the four lenses and the fifth lens within a reasonable numerical range, the focal lengths of the two lenses in the cemented lens are close to each other, which is beneficial to smooth transition of light rays and correction of chromatic aberration of an optical 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 0.5. For example, | F1/F | ≧ 1. The ratio of the effective focal length of the first lens to the total effective focal length of the optical lens is controlled within a reasonable numerical range, so that more light rays can stably enter the optical system, and the illumination of the optical lens is increased.

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 may satisfy: dn/dm < 7, wherein n and m are selected from 1, 2, 3, 4, 5 and 6. For example, dn/dm ≦ 6, where n and m are selected from 1, 2, 3, 4, 5, and 6. The ratio of the maximum central thickness to the minimum central thickness of the first lens to the sixth lens is controlled within a reasonable numerical range, so that the thickness of each lens in the optical lens is uniform, the effect is stable, and the characteristics of small light change and good temperature performance of the optical lens at high and low temperatures are facilitated to be realized.

In an exemplary embodiment, the combined focal length F45 of the fourth and fifth lenses and the total effective focal length F of the optical lens may satisfy: and the | F45/F | is more than or equal to 0.5. For example, | F45/F | ≧ 1. By controlling the ratio of the combined focal length of the fourth lens and the fifth lens to the total effective focal length of the optical lens within a reasonable numerical range, the focal length of the cemented lens can be reasonably distributed, which is beneficial to realizing the thermal compensation of the optical system.

In an exemplary embodiment, the radius of curvature R2 of the image-side surface of the first lens and the radius of curvature R3 of the object-side surface of the second lens may satisfy: the ratio of (R2-R3)/(R2+ R3) is more than or equal to-50 and less than or equal to 200. For example, -40. ltoreq. (R2-R3)/(R2+ R3) 180. The mutual relation between the curvature radiuses of the image side surface of the first lens and the object side surface of the second lens is reasonably controlled, so that the aberration of the optical system can be effectively corrected, and the incident light rays are relatively gentle when the light rays emitted from the first lens enter the object side surface of the second lens, so that the tolerance sensitivity of the optical system is reduced.

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 2. For example, | R11/R12| ≦ 1.5. The mutual relation between the curvature radiuses of the object side surface and the image side surface of the sixth lens is reasonably controlled, so that the curvature radiuses of the object side surface and the image side surface of the sixth lens are close to each other, light rays can smoothly enter an imaging surface, and the resolving power of an optical system is improved.

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, T12/TTL ≧ 0.1. The ratio of the spacing distance of the center of the image side surface of the first lens to the center of the object side surface of the second lens on the optical axis to the total optical length of the optical lens is controlled within a reasonable numerical range, so that the first lens and the second lens can be pulled apart by a certain distance to reduce the chief ray angle of the optical lens.

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 0.1. For example, T23/TTL ≦ 0.08. The ratio of the spacing 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 total optical length of the optical lens is controlled within a reasonable numerical range, so that the distance between the second lens and the third lens can be retracted, and the miniaturization of the optical lens is facilitated.

In an exemplary embodiment, the center thickness d3 of the third lens and the distance TTL on the optical axis from the center of the object-side surface of the first lens to the imaging surface of the optical lens may satisfy: d3/TTL is more than or equal to 0.1. For example, d3/TTL ≧ 0.12. The ratio of the central thickness of the third lens to the total optical length of the optical lens is controlled within a reasonable numerical range, so that the third lens has later central thickness to ensure that light rays are smoothly emitted.

In an exemplary embodiment, a distance T56 between the center of the image-side surface of the fifth lens and the center of the object-side surface of the sixth 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: T56/TTL is less than or equal to 0.1. For example, T56/TTL ≦ 0.08. The ratio of the spacing distance of the center of the image side surface of the fifth lens to the center of the object side surface of the sixth lens on the optical axis to the total optical length of the optical lens is controlled within a reasonable numerical range, the distance between the fifth lens and the sixth lens can be controlled, the smooth transition of light rays is guaranteed, and the image quality of the optical system is improved.

In an exemplary embodiment, an edge slope K (S2) at the maximum angle of view of the image-side surface of the first lens may satisfy: arctan (1/K (S2)) > 35. For example, arctan (1/K (S2)) > 38. The numerical range of the edge slope under the maximum field angle of the image side surface of the first lens is reasonably controlled, so that the rapid focusing of the large-angle peripheral light rays entering through the first lens is facilitated, and the image quality of the optical lens is improved.

In an exemplary embodiment, a diaphragm may be disposed between, for example, the third lens and the fourth lens to further improve the imaging quality of the optical lens. The diaphragm is arranged between the third lens and the fourth lens, so that light rays entering the optical lens can be effectively converged, the aperture of the rear lens is reduced, the assembly sensitivity of the lens is reduced, and the total length of the optical lens is shortened. In the embodiment of the present application, the stop may be disposed in the vicinity of the image side surface of the third lens or in the vicinity of the object side surface of the fourth lens. It should be noted, however, that the positions of the diaphragms disclosed herein are merely examples and not limitations; in alternative embodiments, the diaphragm may be disposed at other positions according to actual needs.

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

In an exemplary embodiment, the third lens may be a spherical lens; the first lens, the second lens, the fourth lens, the fifth lens, and the sixth lens may be aspheric lenses. Alternatively, the first lens and the third lens may be spherical lenses; the second lens, the fourth lens, the fifth lens, and the sixth lens may be aspheric lenses. The specific number of the spherical lenses and the aspherical lenses is not particularly limited, and the number of the aspherical lenses can be increased when the imaging quality is mainly embodied. In particular, in order to improve the resolution quality of the optical system, the first lens, the second lens, the third lens, the fourth lens, the fifth lens, and the sixth lens may all be aspheric lenses. The aspheric lens is characterized in that: the curvature varies continuously from the center to the periphery of the lens. Unlike a spherical lens having a constant curvature from the center to the periphery of the lens, an aspherical lens has better curvature radius characteristics, and has advantages of improving distortion aberration and improving astigmatic aberration. After the aspheric lens is adopted, the aberration generated in imaging can be eliminated as much as possible, so that the imaging quality of the lens is improved. For example, at least one of the object-side surface and the image-side surface of the first lens to the sixth lens may employ an aspherical surface lens to further improve the resolution quality.

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.

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 six lenses are used, the optical lens has at least one beneficial effect of high resolution (more than two million pixels), low cost, small front port diameter, confocal performance of visible light and infrared light, dual-purpose use of day and night, good temperature performance and the like. The optical lens meets the requirements of high resolution, and is favorable for realizing the characteristics of large view field, miniaturization, low cost, good stability, low sensitivity, high production yield and the like. Meanwhile, the optical lens can be well matched with a vehicle-mounted visible light (such as RGB light) chip and an infrared light (such as IR light) chip so as to realize confocal of the visible light and the infrared light, so that the optical lens has a good imaging effect in the day or at night.

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.

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

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

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

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

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.

In the present embodiment, the fourth lens L4 and the fifth lens L5 may be cemented to constitute a cemented lens.

Optionally, the optical lens may further include a filter L7 having an object side S13 and an image side S14. The filter L7 can be used to correct color deviations. The optical lens may further include a protective glass L8 having an object-side surface S15 and an image-side surface S16. The protective glass L8 may be used to protect the image sensing chip IMA located at the imaging plane S17. The light from the object passes through the respective surfaces S1 to S16 in order and is finally imaged on the imaging surface S17.

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 third lens L23 and the fourth lens L4 to further improve the imaging quality. For example, the stop STO may be disposed between the third lens L3 and the fourth lens L4 at a position close to the image side surface S6 of the third lens L3.

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 embodiment 1, the object-side surface and the image-side surface of the first lens L1, the second lens L2, the fourth lens L4, the fifth lens L5, and the sixth lens L6 may be aspheric, and the surface type 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 aspheric surface. Table 2 below lists the cone coefficients k and the respective high order term coefficients A4, A6, A8, A10, A12, A14 and A16 that can be used for the aspherical lens surfaces S1-S4, S8-S12 in example 1.

Flour mark

k

A4

A6

A8

A10

A12

A14

A16

S1

-3.2496

-1.168E-04

-4.104E-06

-5.644E-08

4.340E-09

4.025E-10

8.416E-12

-2.195E-12

S2

-0.0149

1.135E-03

-3.048E-05

2.642E-05

-1.610E-06

-3.804E-06

-1.741E-06

-5.969E-07

S3

-3.8889

8.005E-03

-1.878E-04

-2.189E-03

1.152E-03

-1.728E-04

-5.260E-07

8.349E-07

S4

288.4244

4.757E-02

-2.601E-03

-3.278E-03

2.672E-03

-1.392E-04

1.738E-05

-2.610E-05

S8

-1.0809

-1.719E-03

9.512E-03

3.284E-03

-8.322E-03

-2.595E-03

7.415E-04

6.210E-03

S9

-0.5336

1.760E-01

-2.726E-01

1.868E-01

-1.286E-01

6.079E-02

-1.733E-03

-3.929E-03

S10

100.8724

-1.314E-02

3.109E-02

-3.553E-02

1.935E-02

-3.896E-03

-1.677E-05

2.836E-05

S11

-8.8992

1.013E-02

-8.677E-03

-5.035E-04

1.464E-04

1.677E-04

2.467E-06

-1.566E-06

S12

-54.5649

1.282E-02

-1.384E-02

5.373E-03

-1.540E-03

2.063E-04

1.525E-06

3.094E-07

TABLE 2

Example 2

An optical lens according to embodiment 2 of the present application is described below with reference to fig. 2. In this embodiment and the following embodiments, a description of parts similar to those of embodiment 1 will be omitted for the sake of brevity. 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 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 aspheric.

Optionally, the optical lens may further include a filter L7 having an object side S13 and an image side S14. The filter L7 can be used to correct color deviations. The optical lens may further include a protective glass L8 having an object-side surface S15 and an image-side surface S16. The protective glass L8 may be used to protect the image sensing chip IMA located at the imaging plane S17. Light from the object sequentially passes through the respective surfaces S1 to S16 and is finally imaged on the imaging surface S17.

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 third lens L3 and the fourth lens L4 to further improve the imaging quality.

Table 3 shows the radius of curvature R, the thickness d/the 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) of each lens of the optical lens of example 2, the refractive index Nd, and the dispersion coefficient Vd.

TABLE 3

In embodiment 2, the object-side surface and the image-side surface of the first lens L1, the second lens L2, the fourth lens L4, the fifth lens L5, and the sixth lens L6 may be aspheric, and the surface type x of each aspheric lens may be defined using, but is not limited to, formula (1) in embodiment 1. Table 4 below lists the cone coefficients k and the respective high order term coefficients A4, A6, A8, A10, A12, A14 and A16 which can be used for the aspherical lens surfaces S1-S4, S8-S12 in example 2.

Flour mark

k

A4

A6

A8

A10

A12

A14

A16

S1

-7.2672

-2.330E-04

-1.066E-05

-3.553E-07

-5.253E-09

2.806E-10

2.124E-11

6.169E-14

S2

-0.0156

2.410E-03

-1.824E-04

7.115E-05

1.031E-05

-3.215E-06

-2.301E-06

-8.952E-07

S3

-4.2230

8.403E-03

-1.165E-04

-2.175E-03

1.147E-03

-1.765E-04

-1.287E-06

1.219E-06

S4

376.1066

4.795E-02

-2.228E-03

-3.490E-03

2.505E-03

-1.851E-04

2.243E-05

-1.587E-05

S8

-1.0755

-1.707E-03

8.509E-03

2.795E-03

-7.068E-03

-8.349E-04

3.173E-04

1.959E-03

S9

-0.5301

1.808E-01

-2.860E-01

1.826E-01

-1.164E-01

7.268E-02

3.494E-04

-6.751E-03

S10

104.2322

-1.449E-02

3.140E-02

-3.499E-02

1.957E-02

-3.873E-03

-4.539E-05

1.299E-05

S11

-9.2884

1.074E-02

-8.429E-03

-4.112E-04

1.765E-04

1.756E-04

4.898E-06

-3.804E-07

S12

-59.7449

1.340E-02

-1.327E-02

5.455E-03

-1.542E-03

2.037E-04

1.759E-06

9.703E-07

TABLE 4

Example 3

An optical lens according to embodiment 3 of the present application is described below with reference to fig. 3. Fig. 3 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 element L3 is a biconvex lens with positive refractive power, and has a convex object-side surface S5 and a convex image-side surface S6, and both the object-side surface S5 and the image-side surface S6 of the third lens element L3 are spherical surfaces.

Table 5 shows the radius of curvature R, the thickness d/distance T (it is understood that the thickness d/distance T of the row in which S1 is located is the center thickness d1 of the first lens L1, the thickness d/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), the refractive index Nd, and the dispersion coefficient Vd of each lens of the optical lens of example 3.

TABLE 5

In embodiment 3, the object-side surface and the image-side surface of the first lens L1, the second lens L2, the fourth lens L4, the fifth lens L5, and the sixth lens L6 may be aspheric, and the surface type x of each aspheric lens may be defined using, but is not limited to, formula (1) in embodiment 1. Table 6 below lists the cone coefficients k and the respective high-order term coefficients A4, A6, A8, A10, A12, A14 and A16 which can be used for the aspherical lens surfaces S1-S4, S8-S12 in example 3.

Flour mark

k

A4

A6

A8

A10

A12

A14

A16

S1

-8.7208

-2.379E-04

-8.861E-06

-1.994E-07

1.708E-09

8.006E-10

3.126E-11

-1.541E-12

S2

-0.0132

3.121E-03

-1.890E-04

9.407E-05

1.408E-05

-3.202E-06

-2.475E-06

-9.706E-07

S3

-4.3796

8.424E-03

-1.357E-04

-2.180E-03

1.146E-03

-1.771E-04

-1.564E-06

1.103E-06

S4

451.0392

4.788E-02

-1.961E-03

-3.356E-03

2.544E-03

-1.842E-04

1.432E-05

-2.482E-05

S8

-1.0500

-1.446E-03

9.094E-03

3.482E-03

-6.643E-03

-1.013E-03

-4.075E-04

2.319E-03

S9

-0.5300

1.823E-01

-2.876E-01

1.776E-01

-1.213E-01

7.004E-02

1.030E-03

-3.269E-03

S10

106.0232

-1.490E-02

3.129E-02

-3.499E-02

1.956E-02

-3.882E-03

-5.365E-05

1.805E-05

S11

-9.4689

1.092E-02

-8.379E-03

-3.719E-04

1.998E-04

1.854E-04

7.675E-06

-6.676E-07

S12

-56.4198

1.391E-02

-1.304E-02

5.500E-03

-1.535E-03

2.045E-04

1.975E-06

1.198E-06

TABLE 6

Example 4

An optical lens according to embodiment 4 of the present application is described below with reference to fig. 4. Fig. 4 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 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 both the object-side surface S1 and the image-side surface S2 of the first lens element L1 are spherical.

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

The sixth lens L6 is a meniscus lens with positive power, and has a convex object-side surface S11, 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.

Table 7 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 4.

TABLE 7

In embodiment 4, the object-side surface and the image-side surface of the second lens L2, the fourth lens L4, the fifth lens L5, and the sixth lens L6 may be aspheric, and the surface type x of each aspheric lens may be defined using, but not limited to, formula (1) in embodiment 1. Table 8 below gives the cone coefficients k and the high-order term coefficients A4, A6, A8, A10, A12, A14 and A16 which can be used for the aspherical mirrors S3, S4, S8 to S12 in example 4.

Flour mark

k

A4

A6

A8

A10

A12

A14

A16

S3

-3.8502

4.606E-03

-6.020E-05

-3.863E-04

1.096E-04

-9.290E-06

0.000E+00

S4

-178.4976

2.549E-02

-3.108E-04

-6.682E-04

1.944E-04

-1.509E-05

0.000E+00

S8

-0.3459

2.473E-03

8.127E-04

1.992E-03

-2.707E-03

1.299E-03

0.000E+00

S9

-1.5430

4.069E-03

6.197E-02

-4.671E-02

-2.155E-03

5.792E-03

0.000E+00

S10

374.9383

8.506E-03

1.156E-02

-4.130E-03

1.754E-03

-4.547E-04

0.000E+00

S11

-20.4524

-3.764E-03

-1.643E-03

4.472E-04

4.849E-05

-4.908E-06

0.000E+00

S12

-48.3360

-8.758E-03

-1.557E-03

7.160E-04

-1.530E-04

1.784E-05

0.000E+00

TABLE 8

Example 5

An optical lens according to embodiment 5 of the present application is described below with reference to fig. 5. Fig. 5 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.

Optionally, the optical lens may further include a filter L7 having an object side S13 and an image side S14. The filter L7 can be used to correct color deviations. The optical lens may further include a protective glass L8 having an object-side surface S15 and an image-side surface S16. The protective glass L8 can be used to protect the image sensing chip IMA located at the imaging plane S17. The light from the object passes through the respective surfaces S1 to S16 in order and is finally imaged on the imaging surface S17.

Table 9 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 5.

TABLE 9

In example 5, the object-side surface and the image-side surface of the second lens L2, the fourth lens L4, the fifth lens L5, and the sixth lens L6 may be aspheric, and the surface type x of each aspheric lens may be defined using, but is not limited to, formula (1) in example 1. Table 10 below gives the cone coefficients k and the high-order term coefficients A4, A6, A8, A10, A12, A14 and A16 which can be used for the aspherical mirrors S3, S4, S8 to S12 in example 5.

Flour mark

k

A4

A6

A8

A10

A12

A14

A16

S3

-4.0689

6.074E-03

1.759E-04

-4.137E-04

9.464E-05

-7.129E-06

0.000E+00

S4

-62.9796

3.087E-02

-5.938E-04

-9.016E-04

2.624E-04

-2.295E-05

0.000E+00

S8

-0.4071

1.922E-04

4.957E-03

-8.940E-05

-3.911E-03

2.507E-03

0.000E+00

S9

-0.4513

-1.015E-02

6.076E-02

-3.821E-02

-3.930E-03

4.507E-03

0.000E+00

S10

833.6775

2.014E-03

1.708E-02

-4.886E-03

8.408E-04

6.002E-05

0.000E+00

S11

-12.4582

-2.209E-03

-1.343E-03

4.399E-04

4.038E-05

-5.902E-06

0.000E+00

S12

-23.8695

-6.915E-03

-1.305E-03

7.404E-04

-1.481E-04

1.772E-05

0.000E+00

Watch 10

Example 6

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

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

The sixth lens element L6 is a biconvex lens having positive refractive power in a region close to the optical axis, has a convex surface on the object-side surface S11 in a region close to the optical axis, has a convex surface on the image-side surface S12 in a region close to the optical axis, and has aspheric surfaces on both the object-side surface S11 and the image-side surface S12 of the sixth lens element L6.

Optionally, the optical lens may further include a filter L7 having an object side S13 and an image side S14. The filter L7 can be used to correct color deviations. The optical lens may further include a protective glass L8 having an object-side surface S15 and an image-side surface S16. The protective glass L8 can be used to protect the image sensing chip IMA located at the imaging plane S17. Light from the object sequentially passes through the respective surfaces S1 to S16 and is finally imaged on the imaging surface S17.

Table 11 shows the radius of curvature R, the thickness d/distance T (it is understood that the thickness d/distance T of the row in which S1 is located is the center thickness d1 of the first lens L1, the thickness d/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) of each lens of the optical lens of example 6, the refractive index Nd, and the Abbe number Vd.

TABLE 11

In example 6, the object-side surface and the image-side surface of the second lens L2, the fourth lens L4, the fifth lens L5, and the sixth lens L6 may be aspheric, and the surface type x of each aspheric lens may be defined using, but is not limited to, formula (1) in example 1. Table 12 below gives the cone coefficients k and the respective high-order term coefficients A4, A6, A8, A10, A12, A14 and A16 which can be used for the respective aspherical mirrors S3, S4, S8 to S12 in example 6.

TABLE 12

Example 7

An optical lens according to embodiment 7 of the present application is described below with reference to fig. 7. Fig. 7 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.

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

Table 13 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 7.

Watch 13

In example 7, the object-side surface and the image-side surface of the first lens L1, the second lens L2, the third lens L3, the fourth lens L4, the fifth lens L5, 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 example 1. Table 14 below gives the cone coefficients k and the high-order term coefficients A4, A6, A8, A10, A12, A14 and A16 which can be used for the aspherical mirrors S1-S12 in example 7.

Flour mark

k

A4

A6

A8

A10

A12

A14

A16

S1

-62.5132

-6.273E-04

-3.464E-05

-1.321E-06

8.221E-09

1.009E-08

0.000E+00

S2

-0.1323

-1.099E-02

3.641E-03

3.519E-04

-1.159E-04

3.422E-06

0.000E+00

S3

-2.1628

1.477E-02

1.706E-04

-2.167E-03

1.422E-03

-2.354E-04

0.000E+00

S4

254.7892

3.431E-02

-2.912E-03

7.988E-04

9.198E-04

1.025E-04

0.000E+00

S5

0.1322

2.320E-03

-1.888E-03

2.072E-04

5.950E-04

-3.429E-05

0.000E+00

S6

582.4660

-2.102E-03

8.902E-03

3.809E-03

-2.392E-03

1.920E-03

0.000E+00

S8

-1.0645

-1.164E-02

1.803E-02

-1.152E-02

5.086E-03

-1.023E-03

0.000E+00

S9

0.0338

-6.713E-02

1.202E-01

-7.543E-02

2.364E-02

-7.721E-04

0.000E+00

S10

82.7387

3.806E-04

3.840E-02

-1.354E-02

6.190E-03

-1.618E-03

0.000E+00

S11

-38.9936

-1.042E-02

3.746E-04

5.102E-03

5.364E-04

-3.994E-04

0.000E+00

S12

-42.5818

-2.650E-02

-2.949E-03

3.365E-03

-8.056E-04

1.247E-04

0.000E+00

TABLE 14

Example 8

An optical lens according to embodiment 8 of the present application is described below with reference to fig. 8. Fig. 8 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 third lens element L3 is a biconvex lens with positive refractive power, and has a convex object-side surface S5 and a convex image-side surface S6, and both the object-side surface S5 and the image-side surface S6 of the third lens element L3 are aspheric.

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

Table 15 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 8.

Watch 15

In example 8, the object-side surface and the image-side surface of the first lens L1, the second lens L2, the third lens L3, the fourth lens L4, the fifth lens L5, 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 example 1. Table 16 below gives the cone coefficients k and the high-order term coefficients A4, A6, A8, A10, A12, A14 and A16 which can be used for the aspherical mirrors S1-S12 in example 8.

TABLE 16

Example 9

An optical lens according to embodiment 9 of the present application is described below with reference to fig. 9. Fig. 9 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.

In the present embodiment, the fourth lens L4 and the fifth lens L5 may constitute a cemented lens by cementing.

Table 17 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 9.

TABLE 17

In example 9, the object-side surface and the image-side surface of the first lens L1, the second lens L2, the third lens L3, the fourth lens L4, the fifth lens L5, 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 example 1. Table 18 below gives the cone coefficients k and the high-order term coefficients A4, A6, A8, A10, A12, A14 and A16 which can be used for the aspherical mirrors S1-S12 in example 9.

Flour mark

k

A4

A6

A8

A10

A12

A14

A16

S1

-43.7810

-4.233E-04

-2.206E-05

-5.713E-07

1.706E-08

1.322E-09

0.000E+00

S2

-0.2344

-1.253E-02

3.237E-03

3.362E-04

-1.085E-04

-1.210E-05

0.000E+00

S3

-1.8916

1.314E-02

-6.058E-05

-2.201E-03

1.412E-03

-2.397E-04

0.000E+00

S4

231.8017

3.493E-02

-3.403E-03

1.100E-03

1.173E-03

-1.780E-06

0.000E+00

S5

0.1475

2.663E-03

-1.902E-03

6.041E-05

5.761E-04

1.640E-05

0.000E+00

S6

574.6601

-3.521E-03

8.807E-03

4.162E-03

-2.069E-03

2.637E-03

0.000E+00

S8

-1.0649

-1.164E-02

1.840E-02

-1.156E-02

4.994E-03

-1.012E-03

0.000E+00

S9

-0.0143

-6.482E-02

1.201E-01

-7.537E-02

2.331E-02

-9.410E-04

0.000E+00

S10

81.8249

5.059E-04

3.864E-02

-1.356E-02

6.148E-03

-1.620E-03

0.000E+00

S11

-67.6401

-1.190E-02

-1.216E-03

4.522E-03

4.640E-04

-3.160E-04

0.000E+00

S12

-49.5959

-3.213E-02

-3.486E-03

3.260E-03

-8.684E-04

8.561E-05

0.000E+00

Watch 18

Example 10

An optical lens according to embodiment 10 of the present application is described below with reference to fig. 10. Fig. 10 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.

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.

Table 19 shows the radius of curvature R, the thickness d/distance T (it is understood that the thickness d/distance T of the row in which S1 is located is the center thickness d1 of the first lens L1, the thickness d/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), the refractive index Nd, and the dispersion coefficient Vd of each lens of the optical lens of example 10.

Watch 19

In example 10, the object-side surface and the image-side surface of the second lens L2, the fourth lens L4, the fifth lens L5, and the sixth lens L6 may be aspheric, and the surface type x of each aspheric lens may be defined using, but is not limited to, formula (1) in example 1. The following table 20 lists the cone coefficients k and the respective high-order term coefficients a4, a6, A8, a10, a12, a14 and a16 which can be used for the aspherical lens surfaces S3, S4 and S8 to S12 in example 10.

Watch 20

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

Table 21 shows the radius of curvature R, the thickness d/the 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), the refractive index Nd, and the dispersion coefficient Vd of each lens of the optical lens of example 11.

TABLE 21

In example 11, the object-side surface and the image-side surface of the first lens L1, the second lens L2, the fourth lens L4, the fifth lens L5, and the sixth lens L6 may be aspheric, and the surface type x of each aspheric lens may be defined using, but is not limited to, formula (1) in example 1. Table 22 below lists the cone coefficients k and the respective high-order term coefficients A4, A6, A8, A10, A12, A14 and A16 which can be used for the aspherical lens surfaces S1-S4 and S8-S12 in example 11.

Flour mark

k

A4

A6

A8

A10

A12

A14

A16

S1

0.0088

1.136E-08

9.347E-10

-3.905E-11

3.125E-12

1.968E-13

3.407E-14

3.270E-15

S2

-0.0005

2.556E-08

-7.683E-08

-4.624E-08

-1.448E-08

-3.919E-09

-9.984E-10

-2.523E-10

S3

-99.1792

3.691E-02

-7.768E-03

-3.174E-03

1.442E-03

-1.676E-04

2.803E-08

7.834E-08

S4

0.6956

1.635E-01

-4.778E-02

2.504E-02

-7.601E-03

-2.062E-04

4.102E-05

3.396E-06

S8

0.2077

1.697E-02

8.093E-03

1.084E-02

-6.013E-03

-9.043E-04

-9.164E-04

-7.681E-04

S9

-2.9872

6.901E-02

-4.205E-01

3.589E-01

-2.608E-01

6.491E-02

6.078E-03

5.458E-03

S10

3.5570

-4.415E-03

1.077E-02

-2.555E-02

1.908E-02

-3.733E-03

4.591E-05

4.594E-06

S11

0.0338

-9.213E-02

4.293E-02

-2.505E-02

5.029E-03

1.597E-04

1.946E-06

3.028E-06

S12

29.8196

5.039E-03

-2.442E-03

7.839E-04

-1.033E-03

1.988E-04

-3.951E-08

-3.487E-08

TABLE 22

Example 12

An optical lens according to embodiment 12 of the present application is described below with reference to fig. 12. Fig. 12 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 first lens L1 is a meniscus lens with negative power, the object-side surface S1 is convex, the image-side surface S2 is concave, and both the object-side surface S1 and the image-side surface S2 of the first lens L1 are spherical.

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

The fifth lens L5 is a meniscus lens with negative 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 aspheric.

Table 23 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 12.

TABLE 23

In example 12, the object-side surface and the image-side surface of the second lens L2, the fourth lens L4, the fifth lens L5, and the sixth lens L6 may be aspheric, and the surface type x of each aspheric lens may be defined using, but is not limited to, formula (1) in example 1. Table 24 below gives the cone coefficients k and the high-order term coefficients A4, A6, A8, A10, A12, A14 and A16 which can be used for the aspherical mirrors S3, S4 and S8 to S12 in example 12.

Flour mark

k

A4

A6

A8

A10

A12

A14

A16

S3

-3.7750

4.423E-03

-8.989E-05

-3.866E-04

1.113E-04

-8.022E-06

3.562E-07

9.337E-08

S4

-206.7202

2.588E-02

-2.066E-04

-6.409E-04

2.029E-04

-1.368E-05

-4.468E-08

-1.074E-07

S8

-0.3799

1.993E-03

6.587E-04

1.990E-03

-2.534E-03

1.492E-03

1.957E-04

-1.013E-05

S9

-1.3121

5.794E-04

5.730E-02

-5.225E-02

-5.256E-03

5.648E-03

4.333E-04

3.166E-04

S10

-784.3238

1.761E-02

1.222E-02

-7.006E-03

2.728E-04

-2.464E-03

2.924E-04

1.916E-04

S11

-19.9933

-4.010E-03

-1.791E-03

3.704E-04

9.108E-06

-2.626E-05

-1.235E-05

-6.561E-06

S12

-45.3466

-8.602E-03

-1.473E-03

7.519E-04

-1.424E-04

2.086E-05

1.056E-06

4.477E-07

Watch 24

Example 13

An optical lens according to embodiment 13 of the present application is described below with reference to fig. 13. Fig. 13 is a schematic diagram showing a structure of an optical lens according to embodiment 13 of the present application.

As shown in fig. 13, 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.

Table 25 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 13.

TABLE 25

In example 13, the object-side surface and the image-side surface of the second lens L2, the fourth lens L4, the fifth lens L5, and the sixth lens L6 may be aspheric, and the surface type x of each aspheric lens may be defined using, but is not limited to, formula (1) in example 1. The following table 26 shows the cone coefficients k and the high-order term coefficients a4, a6, A8, a10, a12, a14 and a16 which can be used for the aspherical mirror surfaces S3, S4 and S8 to S12 in example 13.

Flour mark

k

A4

A6

A8

A10

A12

A14

A16

S3

-3.7448

4.433E-03

-7.863E-05

-3.855E-04

1.118E-04

-8.038E-06

3.255E-07

7.843E-08

S4

-215.3556

2.589E-02

-2.204E-04

-6.435E-04

2.028E-04

-1.328E-05

2.211E-07

2.437E-08

S8

-0.3806

1.979E-03

7.059E-04

2.138E-03

-2.233E-03

1.992E-03

9.352E-04

1.004E-03

S9

-1.3279

1.016E-03

5.701E-02

-5.404E-02

-8.837E-03

3.167E-04

-6.025E-03

-7.349E-03

S10

-634.2753

1.749E-02

1.234E-02

-6.814E-03

4.376E-04

-2.340E-03

3.799E-04

2.412E-04

S11

-19.3366

-3.948E-03

-1.819E-03

3.528E-04

6.742E-06

-2.566E-05

-1.129E-05

-5.804E-06

S12

-49.8907

-8.707E-03

-1.481E-03

7.490E-04

-1.476E-04

1.825E-05

-1.768E-07

-5.144E-08

Watch 26

In summary, embodiment 1 to embodiment 13 satisfy the relationships shown in tables 27A and 27B. In tables 27A and 27B, units of TTL, BFL, F, D, H, F4, F5, F6, D1, D2, T56, R11, R12, R21, R22, D41, R41, and SAG41 are millimeters (mm), and units of FOV are degrees (°).

TABLE 27A

TABLE 27B

The present application also provides an electronic device that may include the optical lens according to the above-described embodiments of the present application and an imaging element for converting an optical image formed by the optical lens into an electrical signal. The electronic device may be a stand-alone electronic device such as a range finding camera or may be an imaging module integrated on a device such as a range finding device. Furthermore, the electronic device may also be a stand-alone imaging device such as a vehicle-mounted camera, or may be an imaging module integrated on a driving assistance system such as a car.

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

Claims

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

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

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

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

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

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

the object side surface of the sixth lens with positive focal power is a convex surface, and the image side surface of the sixth lens is a concave surface.

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≤7。

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 image plane 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 image plane of the optical lens on the optical axis satisfy:

BFL/TTL≥0.05。

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≤0.08。

5. an optical lens according to claim 1, wherein an F-number FNO of the optical lens and a total effective focal length F of the optical lens satisfy:

F/FNO≥0.5。

6. an optical lens according to claim 1, characterized in that the effective focal length F6 of the sixth lens and the total effective focal length F of the optical lens satisfy:

|F6/F|≥2。

7. an optical lens according to claim 1, characterized in that the effective focal length F2 of the second lens and the total effective focal length F of the optical lens satisfy:

1.0≤|F2/F|≤10。

8. an optical lens as claimed in claim 1, characterized in that the effective focal length F4 of the fourth lens and the effective focal length F5 of the fifth lens satisfy:

0.3≤|F4/F5|≤3。

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 negative optical power;

a third lens having a positive optical power;

a fourth lens having a positive optical power;

a fifth lens having a negative optical power; and

a sixth lens having a positive optical power,

wherein, F-number FNO of the optical lens and total effective focal length F of the optical lens satisfy:

F/FNO≥0.5。

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