CN117970608A

CN117970608A - Optical lens

Info

Publication number: CN117970608A
Application number: CN202410354704.2A
Authority: CN
Inventors: 周静; 梁伟朝; 应永茂; 蔡聪聪
Original assignee: Sunny Optics Zhongshan Co Ltd
Current assignee: Sunny Optics Zhongshan Co Ltd
Priority date: 2024-03-26
Filing date: 2024-03-26
Publication date: 2024-05-03

Abstract

The application discloses an optical lens. The optical lens sequentially comprises from an object side to an image side along an optical axis: a first lens having positive optical power; a second lens having negative optical power; a third lens having positive optical power; a fourth lens having negative optical power; a fifth lens having negative optical power; a sixth lens having positive optical power; a seventh lens having positive optical power; an eighth lens having positive optical power; a ninth lens having negative optical power; and a tenth lens having positive optical power.

Description

Optical lens

Technical Field

The present application relates to the field of optical elements, and more particularly, to an optical lens.

Background

The intelligent traffic system is called ITS for short, is a novel traffic management system, and mainly combines various technologies such as informatization technology, computer technology, data transmission technology and the like to realize the management of the whole traffic system, and can realize the comprehensive monitoring and management of people, vehicles and roads. The image is acquired as a key link, and the accuracy of image recognition and processing is determined by the performance of the camera lens. Therefore, the lens is required to have the advantages of large target surface, large light transmission aperture, high resolution and the like, and meanwhile, long-time outdoor operation is required, and the lens also has the characteristics of day-night confocal, high-low temperature stability and the like, so that the system can still keep normal operation under the conditions of darkness, low temperature, high temperature and the like. Therefore, it is one of the research hotspots of those skilled in the art to provide a lens with high resolution, large aperture, no heating, large target surface, and day-night confocal.

Disclosure of Invention

An aspect of the present application provides an optical lens, including, in order from an object side to an image side along an optical axis: a first lens having positive optical power; a second lens having negative optical power; a third lens having positive optical power; a fourth lens having negative optical power; a fifth lens having negative optical power; a sixth lens having positive optical power; a seventh lens having positive optical power; an eighth lens having positive optical power; a ninth lens having negative optical power; and a tenth lens having positive optical power.

In one embodiment, the object-side and image-side surfaces of the first lens are both convex; the object side surface and the image side surface of the second lens are concave surfaces; the object side surface and the image side surface of the third lens are convex; the object side surface and the image side surface of the fourth lens are concave surfaces; the object side surface and the image side surface of the fifth lens are concave surfaces; the object side surface and the image side surface of the sixth lens are convex; the object side surface and the image side surface of the seventh lens are both convex surfaces; the object side surface and the image side surface of the eighth lens are both convex surfaces; the object side surface and the image side surface of the ninth lens are concave surfaces; and the object side surface of the tenth lens is a convex surface.

In one embodiment, the optical lens further includes an eleventh lens disposed between the second lens and the third lens, the eleventh lens having negative optical power.

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

In one embodiment, the combined focal length f12 of the first lens and the second lens and the effective focal length f of the optical lens satisfy: f12/f is more than or equal to 0.75 and less than or equal to 1.35.

In one embodiment, the effective focal length f4 of the fourth lens and the effective focal length f of the optical lens satisfy: -0.55.ltoreq.f4/f.ltoreq.0.27.

In one embodiment, the effective focal length f5 of the fifth lens and the effective focal length f of the optical lens satisfy: -0.50.ltoreq.f5/f.ltoreq.0.25.

In one embodiment, the combined focal length f34 of the third lens and the fourth lens and the effective focal length f of the optical lens satisfy: -1.20.ltoreq.f34/f.ltoreq.0.75.

In one embodiment, the combined focal length f56 of the fifth lens and the sixth lens and the effective focal length f of the optical lens satisfy: -1.72 < f56/f < 0.83.

In one embodiment, the effective focal length f7 of the seventh lens and the effective focal length f of the optical lens satisfy: f7/f is more than or equal to 0.64 and less than or equal to 0.88.

In one embodiment, the effective focal length f8 of the eighth lens and the effective focal length f of the optical lens satisfy: f8/f is more than or equal to 0.43 and less than or equal to 0.76.

In one embodiment, the effective focal length f9 of the ninth lens and the effective focal length f of the optical lens satisfy: -0.56.ltoreq.f9/f.ltoreq.0.32.

In one embodiment, the combined focal length f89 of the eighth lens and the ninth lens and the effective focal length f of the optical lens satisfy: -f 89/f is less than or equal to 7.55 and less than or equal to-2.10.

In one embodiment, the effective focal length f10 of the tenth lens and the effective focal length f of the optical lens satisfy: f10/f is more than or equal to 0.85 and less than or equal to 1.33.

In one embodiment, the effective focal length f11 of the eleventh lens and the effective focal length f of the optical lens satisfy: -3.43.ltoreq.f11/f.ltoreq.1.76.

In one embodiment, the distance TTL between the object side surface of the first lens element and the imaging surface of the optical lens element on the optical axis and the effective focal length f of the optical lens element satisfy: TTL/f is less than or equal to 1.96 and less than or equal to 2.15.

In one embodiment, the back focal length BFL of the optical lens and the effective focal length f of the optical lens satisfy: BFL/f is more than or equal to 0.58 and less than or equal to 0.64.

In one embodiment, the effective focal length f of the optical lens and the effective pixel area diagonal length IH on the imaging surface of the optical lens satisfy: f/IH is more than or equal to 2.74 and less than or equal to 2.96.

In one embodiment, the optical lens further comprises a stop disposed between the fourth lens and the fifth lens; the combined focal length fa of all lenses placed on the object side of the diaphragm and the combined focal length fb of all lenses placed on the image side of the diaphragm satisfy: fa/fb is more than or equal to 7.75 and less than or equal to 10.95.

In one embodiment, the maximum light transmission aperture Dmax of the optical lens and the distance TTL between the object side surface of the first lens and the imaging surface of the optical lens on the optical axis satisfy: dmax/TTL is less than or equal to 0.35 and less than or equal to 0.48.

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

The optical lens provided by the application adopts at least ten lenses, and the optical power of each lens is reasonably set, so that the optical lens provided by the application has at least one beneficial effect of large aperture, large target surface, high resolution, no thermalization, day-night confocal and the like.

Drawings

Other features, objects, and advantages of the present application will become more apparent from the following detailed description of the embodiments, which proceeds with reference to the accompanying drawings. In the drawings:

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

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

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

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

Fig. 5 is a schematic structural diagram of an optical lens according to embodiment 5 of the present application; and

Fig. 6 is a schematic structural diagram of an optical lens according to embodiment 6 of the present application.

Detailed Description

In order that the application may be readily understood, a more complete description of the application will be rendered by reference to the appended drawings. It should be understood that the detailed description is merely illustrative of exemplary embodiments of the application and is not intended to limit the scope of the 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 the present specification, the expressions of first, second, third, etc. are only used to distinguish one feature from another feature, and do not represent any limitation on the feature. Accordingly, a first lens discussed below may also be referred to as a second lens or a third lens without departing from the teachings of the present application.

In the drawings, the thickness, size, and shape of the lenses have been slightly exaggerated for convenience of explanation. In particular, the spherical or aspherical shape shown in the drawings is shown by way of example. That is, the shape of the spherical or aspherical surface is not limited to the shape of the spherical or aspherical surface shown in the drawings. The figures are merely examples and are 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, then 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 subject is referred to as the object side of the lens, and the surface of each lens closest to the imaging side is referred to as the image side of the lens.

It will be further understood that the terms "comprises," "comprising," "includes," "including," "having," "containing," 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. Furthermore, when a statement such as "at least one of the following" appears after a list of features that are listed, the entire listed feature is modified instead of modifying a separate element in the list. Furthermore, when describing embodiments of the application, use of "may" means "one or more embodiments of the 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, without conflict, the embodiments of the present application and features of the embodiments may be combined with each other. The application will be described in detail below with reference to the drawings in connection with embodiments.

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

In an exemplary embodiment, the optical lens provided by the present application may include, for example, ten lenses having optical power, i.e., a first lens, a second lens, a third lens, a fourth lens, a fifth lens, a sixth lens, a seventh lens, an eighth lens, a ninth lens, and a tenth lens. The ten lenses are arranged in order from the object side to the image side along the optical axis.

In an exemplary embodiment, the optical lens provided by the present application may include, for example, eleven lenses having optical power, i.e., a first lens, a second lens, an eleventh lens, a third lens, a fourth lens, a fifth lens, a sixth lens, a seventh lens, an eighth lens, a ninth lens, and a tenth lens. That is, the first lens element to the tenth lens element are sequentially arranged from the object side to the image side along the optical axis, and the eleventh lens element is disposed between the second lens element and the third lens element.

In an exemplary embodiment, the optical lens may further include a photosensitive element disposed at an image side of the tenth lens. Alternatively, the photosensitive element disposed on the image side of the tenth lens may be a photosensitive coupling element (CCD) or a complementary metal oxide semiconductor element (CMOS).

In an exemplary embodiment, the optical lens may further include a stop for limiting the light beam to further improve the imaging quality of the optical lens. For example, a diaphragm may be disposed between the fourth lens and the fifth lens. The diaphragm is favorable for converging light rays entering the optical lens, shortens the total length of the optical system, reduces the maximum aperture of the optical lens, and is favorable for realizing miniaturization and reducing the assembly sensitivity of the system. It should be noted, however, that the locations of the diaphragms disclosed herein are merely examples and not limiting; in alternative embodiments, the diaphragm may be arranged in other positions as desired.

In an exemplary embodiment, the first lens and the second lens may constitute a first cemented lens, the third lens and the fourth lens may constitute a second cemented lens, the fifth lens and the sixth lens may constitute a third cemented lens, and the eighth lens and the ninth lens may constitute a fourth cemented lens. The cemented lens is beneficial to balancing various aberrations, improving resolution, realizing high resolution, reducing tolerance sensitivity between lenses and ensuring production yield.

In an exemplary embodiment, the first lens has positive optical power, with both the object-side and image-side surfaces being convex. The arrangement of the first lens can converge light rays, so that the light rays emitted by the first lens keep descending trend, and the aperture size of the rear lens is reduced on the premise of realizing a large aperture, thereby being beneficial to realizing miniaturization of the lens and reducing cost; in addition, the first lens can be made of high-refractive index materials, so that the light height can be reduced rapidly, meanwhile, a proper shape is kept, smaller field curvature and astigmatism are formed, and the resolution is improved.

In an exemplary embodiment, the second lens has a negative optical power, with both the object-side and image-side surfaces being concave. The arrangement of the second lens is beneficial to compressing the light collected by the first lens and smoothly transiting the light to the rear on the premise of realizing a large aperture, so that the sensitivity of the system is reduced and the image quality is improved; in addition, the first lens and the second lens are glued, so that chromatic aberration generated by the optical lens can be reduced, generation of spherical aberration, astigmatism and coma aberration can be reduced, imaging quality of the lens can be improved, and system tolerance sensitivity can be reduced; the negative focal power of the second lens can balance the high-low temperature characteristics of the whole lens, and the lens is guaranteed to have good imaging quality at high and low temperatures.

In an exemplary embodiment, the third lens has positive optical power, and both its object-side and image-side surfaces are convex. This arrangement of the third lens element is advantageous in reducing the incidence angle of on-axis light rays on the object-side surface of the third lens element and in improving the image quality.

In an exemplary embodiment, the fourth lens has negative optical power, and both its object-side and image-side surfaces are concave. The arrangement of the fourth lens is beneficial to compressing the light collected at the front end and enabling the light to be smoothly transited to the rear, so that the sensitivity of the system is reduced, and the image quality is improved; in addition, the third lens and the fourth lens are glued, so that residual chromatic aberration and residual spherical aberration generated by the first lens and the second lens can be corrected, a front lens group arranged on the object side of the diaphragm is guaranteed to have good chromatic aberration and spherical aberration correction effects, and the sensitivity of the front lens group is reduced; meanwhile, the gluing of the third lens and the fourth lens is beneficial to correcting coma generated by the lens.

In an exemplary embodiment, the fifth lens has negative optical power, and both the object side and the image side thereof are concave. The fifth lens and the sixth lens are glued, so that chromatic aberration can be eliminated, spherical aberration can be reduced, astigmatism can be corrected, resolution can be improved, and good balance effect can be achieved on the performance of the optical system at high and low temperatures.

In an exemplary embodiment, the sixth lens has positive optical power, and both the object-side surface and the image-side surface thereof are convex. The sixth lens is glued with the fifth lens, so that the chromatic aberration of the system can be effectively corrected, and the resolution is improved; meanwhile, the generation of chromatic aberration, spherical aberration and astigmatism is reduced, and the coma aberration in the lens is corrected.

In an exemplary embodiment, the seventh lens has positive optical power, and both its object-side and image-side surfaces are convex. This arrangement of the seventh lens is advantageous in improving the imaging quality, balancing the high and low temperature performance of the system, and correcting the residual spherical aberration and residual astigmatism generated by the fifth lens and the sixth lens.

In an exemplary embodiment, the eighth lens has positive optical power, and both the object-side surface and the image-side surface thereof are convex. The arrangement of the eighth lens ensures that the light rays passing through the sixth lens and the seventh lens are lifted upwards and then smoothly reach the image surface, thereby being beneficial to realizing a large target surface and reducing the tolerance sensitivity of the system.

In an exemplary embodiment, the ninth lens has negative optical power, and both its object-side and image-side surfaces are concave. The arrangement of the ninth lens enables the light passing through the ninth lens to effectively receive light and then smoothly reach the image surface, so that the illumination of the lens is improved; the eighth lens and the ninth lens are bonded, residual chromatic aberration generated by the fifth lens, the sixth lens and the seventh lens can be corrected, and meanwhile, the eighth lens and the ninth lens are bonded to be beneficial to correcting coma aberration inside the lens; negative focal power of the ninth lens is beneficial to realizing large target surface and better matching with the chip.

In an exemplary embodiment, the tenth lens has positive optical power, its object-side surface being convex, and the image-side surface being either planar or convex. The arrangement of the tenth lens can effectively receive light to enable light to smoothly reach an image plane, and simultaneously effectively correct residual spherical aberration and residual chromatic aberration of the whole system, correct residual astigmatism generated by the fifth lens to the tenth lens and improve resolution.

In an exemplary embodiment, the eleventh lens disposed between the second lens and the third lens may have negative optical power, an object-side surface thereof being convex, and an image-side surface thereof being concave. The eleventh lens can preferably use a high refractive index material, which is favorable for correcting residual chromatic aberration, residual spherical aberration, residual astigmatism and residual coma generated by the first lens and the second lens, balancing aberration of the whole optical system, and improving resolution.

In an exemplary embodiment, the optical lens according to the present application may satisfy: and f12/f is more than or equal to 0.75 and less than or equal to 1.35, wherein f12 is the combined focal length of the first lens and the second lens, and f is the effective focal length of the optical lens. The combination focal length value of the first lens and the second lens is reasonably controlled to meet the requirement that f12/f is smaller than or equal to 0.75 and smaller than or equal to 1.35, so that excessive aberration caused by excessively strong light refraction change is avoided, and the resolution is improved; and meanwhile, more light rays can enter the rear optical system, so that the illumination intensity is increased.

In an exemplary embodiment, the optical lens according to the present application may satisfy: -0.55 +.f4/f +.0.27, where f4 is the effective focal length of the fourth lens and f is the effective focal length of the optical lens. Satisfies-0.55 f 4/f-0.27, reasonably controls the focal length value of the fourth lens, is favorable for enabling light to smoothly transition at the fourth lens, further improves the resolution quality of the optical lens, and is favorable for balancing the performance of the lens at high and low temperatures.

In an exemplary embodiment, the optical lens according to the present application may satisfy: -0.50 +.f5/f +.0.25, where f5 is the effective focal length of the fifth lens and f is the effective focal length of the optical lens. Satisfies-0.50 < f5/f < 0.25, reasonably controls the focal length value of the fifth lens, can balance the focal length configuration of the front lens group at the object side of the diaphragm, is favorable for smooth transition of light rays and corrects chromatic aberration.

In an exemplary embodiment, the optical lens according to the present application may satisfy: -1.20 +.f34/f+. 0.75, where f34 is the combined focal length of the third lens and the fourth lens and f is the effective focal length of the optical lens. Satisfies-1.20 f 34/f-0.75, reasonably controls the combined focal length value of the third lens and the fourth lens, is favorable for compensating spherical aberration, coma aberration and other aberration introduced by the first lens and the second lens, can further correct chromatic aberration generated by the front lens, and improves the resolution.

In an exemplary embodiment, the optical lens according to the present application may satisfy: -1.72 < f56/f < 0.83. Where f56 is the combined focal length of the fifth lens and the sixth lens, and f is the effective focal length of the optical lens. Satisfies-1.72 f 56/f-0.83, reasonably controls the combined focal length value of the fifth lens and the sixth lens, is favorable for balancing various aberrations generated by the front lens group at the object side of the diaphragm and correcting the residual chromatic aberration of the system.

In an exemplary embodiment, the optical lens according to the present application may satisfy: f7/f is more than or equal to 0.64 and less than or equal to 0.88. Where f7 is the effective focal length of the seventh lens and f is the effective focal length of the optical lens. Satisfies f7/f less than or equal to 0.64 and f less than or equal to 0.88, reasonably controls the focal length value of the seventh lens, is favorable for correcting chromatic aberration, improving resolution and balancing the performance of the lens in a high-low temperature state.

In an exemplary embodiment, the optical lens according to the present application may satisfy: and f8/f is more than or equal to 0.43 and less than or equal to 0.76, wherein f8 is the effective focal length of the eighth lens, and f is the effective focal length of the optical lens. Satisfies 0.43-0.76, and the eighth lens is a positive focal power lens and is matched with the ninth lens with negative focal power, so that chromatic aberration can be eliminated, spherical aberration can be reduced, and resolution can be improved.

In an exemplary embodiment, the optical lens according to the present application may satisfy: -0.56 +.f9/f +.0.32, where f9 is the effective focal length of the ninth lens and f is the effective focal length of the optical lens. The lens satisfies that f9/f is less than or equal to-0.56 and less than or equal to-0.32, and the ninth lens is a lens with negative focal power and is matched with the eighth lens with positive focal power, so that chromatic aberration can be eliminated, spherical aberration can be reduced, and resolution can be improved.

In an exemplary embodiment, the optical lens according to the present application may satisfy: -7.55 +.f89/f +.2.10, where f89 is the combined focal length of the eighth lens and the ninth lens and f is the effective focal length of the optical lens. The combined focal length value of the eighth lens and the ninth lens is reasonably controlled, so that the chromatic aberration can be reduced, the tolerance sensitivity can be reduced, and the requirement of high resolution can be met.

In an exemplary embodiment, the optical lens according to the present application may satisfy: and f10/f is more than or equal to 0.85 and less than or equal to 1.33, wherein f10 is the effective focal length of the tenth lens, and f is the effective focal length of the optical lens. Satisfies f10/f less than or equal to 0.85 and f less than or equal to 1.33, reasonably controls the focal length value of the tenth lens, is favorable for correcting aberration and improves imaging quality.

In an exemplary embodiment, the optical lens according to the present application may satisfy: -3.43.ltoreq.f11/f.ltoreq.1.76, where f11 is the effective focal length of the eleventh lens and f is the effective focal length of the optical lens. Satisfies-3.43 f 11/f-1.76, reasonably controls the focal length value of the eleventh lens, is beneficial to enabling light to stably enter an image plane, centralizes a defocusing curve, is beneficial to improving resolution, and is beneficial to balancing high-low temperature performance of a front lens group arranged on the object side of the diaphragm.

In an exemplary embodiment, the optical lens according to the present application may satisfy: 1.96.ltoreq.TTL/f.ltoreq.2.15, wherein TTL is the distance between the object side surface of the first lens and the imaging surface of the optical lens on the optical axis, and f is the effective focal length of the optical lens. The total optical length of the lens is controlled to be less than or equal to 1.96 and less than or equal to 2.15, so that the total length of the lens is not too large, and the miniaturization is facilitated.

In an exemplary embodiment, the optical lens according to the present application may satisfy: BFL/f is more than or equal to 0.58 and less than or equal to 0.64, wherein BFL is the back focal length of the optical lens, and f is the effective focal length of the optical lens. The BFL/f is more than or equal to 0.58 and less than or equal to 0.64, and the optical back focal length of the system is controlled on the basis of realizing miniaturization, thereby being beneficial to the assembly of the optical lens.

In an exemplary embodiment, the optical lens according to the present application may satisfy: f/IH is more than or equal to 2.74 and less than or equal to 2.96, wherein f is the effective focal length of the optical lens, and IH is the diagonal length of the effective pixel area on the imaging surface of the optical lens. Satisfies f/IH of 2.74-2.96, and is favorable for realizing large target surface imaging.

In an exemplary embodiment, the optical lens according to the present application may satisfy: 7.75.ltoreq.fa/fb.ltoreq.10.95, where fa is the combined focal length of all lenses placed on the object side of the diaphragm and fb is the combined focal length of all lenses placed on the image side of the diaphragm. The combined focal length value of the lens groups at the object side and the image side of the diaphragm is reasonably controlled to meet the requirement that fa/fb is more than or equal to 7.75 and less than or equal to 10.95, so that the large aperture characteristic of the lens is realized, the tolerance sensitivity is reduced, and the production yield is improved.

In an exemplary embodiment, the optical lens according to the present application may satisfy: dmax/TTL is not more than 0.35 and not more than 0.48, wherein Dmax is the maximum aperture of the optical lens, and TTL is the distance from the object side surface of the first lens to the imaging surface of the optical lens on the optical axis. The maximum light transmission full caliber of the system is smaller by controlling the maximum light transmission full caliber of the system under the condition of a certain system optical total length, which is beneficial to realizing miniaturization, and the Dmax/TTL is less than or equal to 0.35.

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

In an exemplary embodiment, each lens in the optical lens of the present application is a spherical lens.

As required, in other exemplary embodiments, each lens of the optical lens of the present application may be a spherical lens or an aspherical lens. The application is not particularly limited to the specific number of spherical lenses and aspherical lenses, and can increase the number of aspherical lenses even if all lenses use aspherical lenses when focusing on the imaging quality. The aspherical 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 a better radius of curvature characteristic, and has advantages of improving distortion aberration and improving astigmatic aberration. After the aspheric lens is adopted, aberration generated during imaging can be eliminated as much as possible, and therefore imaging quality of the lens is improved.

In an exemplary embodiment, each lens in the optical lens of the present application is made of glass. Compared with plastic materials, the glass lens has higher transmittance to visible light, less light energy loss, better imaging permeability, and longer service life, and the glass material is not easy to age and deform.

The optical lens according to the above embodiment of the present application may employ a plurality of lenses, for example, ten or eleven of the above, and at least one of a large aperture, a large target surface, a high image quality, no heating, and day-night confocal of the optical lens can be realized by reasonably distributing optical parameters such as optical power of each lens, surface thickness of each lens, and on-axis spacing between each lens.

The optical lens provided by the application can meet the technical effects of large aperture (FNO is less than or equal to 1.2), large target surface (17.52 mm), high resolution (12 MP pixels), no heating, day-night confocal and the like, and can be suitable for an intelligent traffic system.

The optical lens according to the above embodiment of the present application may employ a plurality of lenses, for example, the above ten or eleven lenses. However, those skilled in the art will appreciate that the various results and advantages described in this specification can be obtained by changing the number of lenses making up a lens barrel without departing from the technical solution claimed in the present application. For example, although description has been made in the embodiment taking ten or eleven lenses as an example, the optical lens is not limited to include ten or eleven lenses. The optical lens may also include other numbers of lenses, if desired. Specific examples of the optical lens applicable to the above-described embodiments are further described below with reference to the accompanying drawings.

Example 1

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

As shown in fig. 1, the optical lens includes, in order from an object side to an image side along an optical axis, a first lens L1, a second lens L2, an eleventh lens L11, a third lens L3, a fourth lens L4, a fifth lens L5, a sixth lens L6, a seventh lens L7, an eighth lens L8, a ninth lens L9, and a tenth lens L10.

The first lens element L1 has positive refractive power, wherein an object-side surface S1 thereof is convex, and an image-side surface S2 thereof is convex.

The second lens element L2 has negative refractive power, wherein an object-side surface S2 thereof is concave, and an image-side surface S3 thereof is concave.

The eleventh lens element L11 has positive refractive power, and has a convex object-side surface S4 and a concave image-side surface S5.

The third lens element L3 has positive refractive power, wherein an object-side surface S6 thereof is convex, and an image-side surface S7 thereof is convex.

The fourth lens element L4 has a negative refractive power, wherein an object-side surface S7 thereof is concave, and an image-side surface S8 thereof is concave.

The fifth lens element L5 has a negative refractive power, wherein an object-side surface S10 thereof is concave, and an image-side surface S11 thereof is concave.

The sixth lens element L6 has positive refractive power, wherein an object-side surface S11 thereof is convex, and an image-side surface S12 thereof is convex.

The seventh lens element L7 has positive refractive power, wherein an object-side surface S13 thereof is convex, and an image-side surface S14 thereof is convex.

The eighth lens element L8 has positive refractive power, wherein an object-side surface S15 thereof is convex, and an image-side surface S16 thereof is convex.

The ninth lens element L9 has negative refractive power, and has a concave object-side surface S16 and a concave image-side surface S17.

The tenth lens L10 has positive optical power, and its object-side surface S18 is convex, and its image-side surface S19 is planar.

The first lens L1 and the second lens L2 form a first cemented lens; the third lens L3 and the fourth lens L4 form a second cemented lens; the fifth lens L5 and the sixth lens L6 constitute a third cemented lens; the eighth lens L8 and the ninth lens L9 constitute a fourth cemented lens.

The optical lens may further include a stop STO, which may be disposed between the fourth lens L4 and the fifth lens L5. Optionally, the optical lens may further include a filter CG having an object side surface S20 and an image side surface S21 and/or a cover glass (not shown) having an object side surface and an image side surface. The filter CG and/or the cover glass may be used for correcting color deviations, and the filter CG and/or the cover glass may also be used for protecting the image sensing chip IMA located at the imaging plane. Light from the object sequentially passes through the respective surfaces S1 to S21 and is finally imaged on the imaging plane.

Table 1 shows the radius of curvature, thickness/distance, refractive index, and abbe number of each lens of the optical lens of example 1, wherein the units of the radius of curvature, thickness/distance are millimeters (mm).

TABLE 1

Example 2

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

As shown in fig. 2, the optical lens includes, in order from an object side to an image side along an optical axis, a first lens L1, a second lens L2, an eleventh lens L11, a third lens L3, a fourth lens L4, a fifth lens L5, a sixth lens L6, a seventh lens L7, an eighth lens L8, a ninth lens L9, and a tenth lens L10.

Table 2 shows the radius of curvature, thickness/distance, refractive index, and abbe number of each lens of the optical lens of example 2, wherein the units of the radius of curvature, thickness/distance are millimeters (mm).

TABLE 2

Example 3

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

As shown in fig. 3, the optical lens includes, in order from an object side to an image side along an optical axis, a first lens L1, a second lens L2, an eleventh lens L11, a third lens L3, a fourth lens L4, a fifth lens L5, a sixth lens L6, a seventh lens L7, an eighth lens L8, a ninth lens L9, and a tenth lens L10.

Table 3 shows the radius of curvature, thickness/distance, refractive index, and abbe number of each lens of the optical lens of example 3, wherein the units of the radius of curvature, thickness/distance are millimeters (mm).

TABLE 3 Table 3

Example 4

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

As shown in fig. 4, the optical lens includes, in order from an object side to an image side along an optical axis, a first lens L1, a second lens L2, a third lens L3, a fourth lens L4, a fifth lens L5, a sixth lens L6, a seventh lens L7, an eighth lens L8, a ninth lens L9, and a tenth lens L10.

The third lens element L3 has positive refractive power, wherein an object-side surface S4 thereof is convex, and an image-side surface S5 thereof is convex.

The fourth lens element L4 has a negative refractive power, wherein an object-side surface S5 thereof is concave, and an image-side surface S6 thereof is concave.

The fifth lens element L5 has a negative refractive power, wherein an object-side surface S8 thereof is concave, and an image-side surface S9 thereof is concave.

The sixth lens element L6 has positive refractive power, wherein an object-side surface S9 thereof is convex, and an image-side surface S10 thereof is convex.

The seventh lens element L7 has positive refractive power, wherein an object-side surface S11 thereof is convex, and an image-side surface S12 thereof is convex.

The eighth lens element L8 has positive refractive power, wherein an object-side surface S13 thereof is convex, and an image-side surface S14 thereof is convex.

The ninth lens element L9 has a negative refractive power, wherein an object-side surface S14 thereof is concave, and an image-side surface S15 thereof is concave.

The tenth lens element L10 has positive refractive power, and its object-side surface S16 is convex, and its image-side surface S17 is convex.

The optical lens may further include a stop STO, which may be disposed between the fourth lens L4 and the fifth lens L5. Optionally, the optical lens may further include a filter CG having an object side surface S18 and an image side surface S19 and/or a cover glass (not shown) having an object side surface and an image side surface. The filter CG and/or the cover glass may be used for correcting color deviations, and the filter CG and/or the cover glass may also be used for protecting the image sensing chip IMA located at the imaging plane. Light from the object sequentially passes through the respective surfaces S1 to S19 and is finally imaged on the imaging plane.

Table 4 shows the radius of curvature, thickness/distance, refractive index, and abbe number of each lens of the optical lens of example 4, wherein the units of the radius of curvature, thickness/distance are millimeters (mm).

TABLE 4 Table 4

Example 5

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

As shown in fig. 5, the optical lens includes, in order from an object side to an image side along an optical axis, a first lens L1, a second lens L2, a third lens L3, a fourth lens L4, a fifth lens L5, a sixth lens L6, a seventh lens L7, an eighth lens L8, a ninth lens L9, and a tenth lens L10.

Table 5 shows the radius of curvature, thickness/distance, refractive index, and abbe number of each lens of the optical lens of example 5, wherein the units of the radius of curvature, thickness/distance are millimeters (mm).

TABLE 5

Example 6

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

As shown in fig. 6, the optical lens includes, in order from an object side to an image side along an optical axis, a first lens L1, a second lens L2, a third lens L3, a fourth lens L4, a fifth lens L5, a sixth lens L6, a seventh lens L7, an eighth lens L8, a ninth lens L9, and a tenth lens L10.

Table 6 shows the radius of curvature, thickness/distance, refractive index, and abbe number of each lens of the optical lens of example 6, wherein the units of the radius of curvature, thickness/distance are millimeters (mm).

TABLE 6

In summary, examples 1 to 6 each satisfy the relationship shown in table 7 below.

TABLE 7

The present application also provides an electronic device, which may include the optical lens according to the above-described embodiment of the present application and an imaging element for converting an optical image formed by the optical lens into an electrical signal.

The above description is only illustrative of the preferred embodiments of the present application and of the principles of the technology employed. It will be appreciated by persons skilled in the art that the scope of the application referred to in the present application is not limited to the specific combinations of the technical features described above, but also covers other technical features formed by any combination of the technical features described above or their equivalents without departing from the inventive concept. Such as the above-mentioned features and the technical features disclosed in the present application (but not limited to) having similar functions are replaced with each other.

Claims

1. The optical lens is characterized in that the optical lens sequentially comprises, from an object side to an image side along an optical axis:

A first lens having positive optical power;

a second lens having negative optical power;

a third lens having positive optical power;

a fourth lens having negative optical power;

A fifth lens having negative optical power;

A sixth lens having positive optical power;

a seventh lens having positive optical power;

An eighth lens having positive optical power;

a ninth lens having negative optical power; and

A tenth lens having positive optical power.

2. The optical lens according to claim 1, wherein,

The object side surface and the image side surface of the first lens are both convex surfaces;

The object side surface and the image side surface of the second lens are concave surfaces;

The object side surface and the image side surface of the third lens are both convex surfaces;

the object side surface and the image side surface of the fourth lens are concave surfaces;

the object side surface and the image side surface of the fifth lens are concave surfaces;

the object side surface and the image side surface of the sixth lens are both convex surfaces;

the object side surface and the image side surface of the seventh lens are both convex surfaces;

the object side surface and the image side surface of the eighth lens are both convex surfaces;

the object side surface and the image side surface of the ninth lens are concave surfaces; and

The object side surface of the tenth lens is a convex surface.

3. The optical lens of claim 1, wherein the optical lens further comprises an eleventh lens disposed between the second lens and the third lens, the eleventh lens having a negative optical power.

4. The optical lens of claim 3, wherein the object-side surface of the eleventh lens is convex and the image-side surface is concave.

5. The optical lens of claim 1, wherein a combined focal length f12 of the first lens and the second lens and an effective focal length f of the optical lens satisfy: f12/f is more than or equal to 0.75 and less than or equal to 1.35.

6. The optical lens according to claim 1, wherein an effective focal length f4 of the fourth lens and an effective focal length f of the optical lens satisfy: -0.55.ltoreq.f4/f.ltoreq.0.27.

7. The optical lens according to claim 1, wherein an effective focal length f5 of the fifth lens and an effective focal length f of the optical lens satisfy: -0.50.ltoreq.f5/f.ltoreq.0.25.

8. The optical lens of claim 1, wherein a combined focal length f34 of the third lens and the fourth lens and an effective focal length f of the optical lens satisfy: -1.20.ltoreq.f34/f.ltoreq.0.75.

9. The optical lens according to claim 1, wherein a combined focal length f56 of the fifth lens and the sixth lens and an effective focal length f of the optical lens satisfy: -1.72 < f56/f < 0.83.

10. The optical lens according to claim 1, wherein an effective focal length f7 of the seventh lens and an effective focal length f of the optical lens satisfy: f7/f is more than or equal to 0.64 and less than or equal to 0.88.

11. The optical lens according to claim 1, wherein an effective focal length f8 of the eighth lens and an effective focal length f of the optical lens satisfy: f8/f is more than or equal to 0.43 and less than or equal to 0.76.

12. The optical lens according to claim 1, wherein an effective focal length f9 of the ninth lens and an effective focal length f of the optical lens satisfy: -0.56.ltoreq.f9/f.ltoreq.0.32.

13. The optical lens according to claim 1, wherein a combined focal length f89 of the eighth lens and the ninth lens and an effective focal length f of the optical lens satisfy: -f 89/f is less than or equal to 7.55 and less than or equal to-2.10.

14. The optical lens according to claim 1, wherein an effective focal length f10 of the tenth lens and an effective focal length f of the optical lens satisfy: f10/f is more than or equal to 0.85 and less than or equal to 1.33.

15. The optical lens according to claim 3, wherein an effective focal length f11 of the eleventh lens and an effective focal length f of the optical lens satisfy: -3.43.ltoreq.f11/f.ltoreq.1.76.

16. The optical lens according to any one of claims 1-15, wherein a distance TTL on the optical axis from an object side surface of the first lens to an imaging surface of the optical lens and an effective focal length f of the optical lens satisfy: TTL/f is less than or equal to 1.96 and less than or equal to 2.15.

17. The optical lens according to any one of claims 1-15, wherein a back focal length BFL of the optical lens and an effective focal length f of the optical lens satisfy: BFL/f is more than or equal to 0.58 and less than or equal to 0.64.

18. The optical lens of any of claims 1-15, wherein an effective focal length f of the optical lens and an effective pixel area diagonal length IH on an imaging surface of the optical lens satisfy: f/IH is more than or equal to 2.74 and less than or equal to 2.96.

19. The optical lens of any of claims 1-15, wherein the optical lens further comprises a stop disposed between the fourth lens and the fifth lens;

The combined focal length fa of all lenses placed on the object side of the diaphragm and the combined focal length fb of all lenses placed on the image side of the diaphragm satisfy: fa/fb is more than or equal to 7.75 and less than or equal to 10.95.

20. The optical lens according to any one of claims 1-15, wherein a maximum light passing aperture Dmax of the optical lens and a distance TTL on the optical axis from an object side surface of the first lens to an imaging surface of the optical lens satisfy: dmax/TTL is less than or equal to 0.35 and less than or equal to 0.48.