CN216792557U

CN216792557U - Camera lens

Info

Publication number: CN216792557U
Application number: CN202220171660.6U
Authority: CN
Inventors: 张韵; 姚嘉诚; 唐梦娜; 吕赛锋; 戴付建; 赵烈烽
Original assignee: Zhejiang Sunny Optics Co Ltd
Current assignee: Zhejiang Sunny Optics Co Ltd
Priority date: 2022-01-21
Filing date: 2022-01-21
Publication date: 2022-06-21
Anticipated expiration: 2032-01-21

Abstract

The utility model provides a camera lens. The image pickup lens sequentially includes, from an object side to an image side along an optical axis: a first lens having an optical power; a second lens having optical power; a third lens having a positive focal power; a fourth lens having a positive refractive power; a fifth lens having optical power; a sixth lens having a negative focal power; the side surface of a shot object of the fourth lens is a convex surface; the object side surface of the fifth lens is a convex surface, and the image side surface of the fifth lens is a convex surface; the object side surface of the sixth lens is a concave surface, and the image side surface of the sixth lens is a concave surface; the on-axis distance TTL from the side surface of the object to be shot of the first lens to the imaging surface and the half of the diagonal length ImgH of the effective pixel area on the imaging surface satisfy the following condition: TTL/ImgH is less than 1.4. The utility model solves the problem that the camera lens in the prior art has wide angle, ultrathin, high image quality and small aberration which are difficult to simultaneously consider.

Description

Camera lens

Technical Field

The utility model relates to the technical field of optical imaging equipment, in particular to a camera lens.

Background

At present, the camera shooting function of the mobile phone gradually replaces the traditional camera shooting function and enters the life of people, and along with the favor of people on the camera shooting function of the mobile phone, the camera shooting lens carried on the mobile phone develops towards the direction of high image quality and high resolution. However, as the demands of people are continuously updated, mobile phones tend to be more and more light, thin and portable, so that the total length of a camera lens system on the mobile phone is shorter and shorter, the performance of the camera lens is required to be ensured while the overall thickness of the camera lens is reduced, the design difficulty is increased, and the design freedom is reduced. In order to meet the requirements of light weight and miniaturization, most of camera lenses on mobile phones are configured with an F number of more than 1.8, and imaging systems with an F number of less than 1.8 are difficult to meet the requirements, and the performance and aberration cannot reach the standard. Therefore, how to make the camera lens satisfy the characteristics of high image quality, small aberration and less stray light at the same time under the condition of large aperture becomes a problem which is difficult to break through.

That is, the imaging lens in the prior art has the problem that wide angle, ultra-thin, high image quality and small aberration are difficult to be simultaneously considered.

SUMMERY OF THE UTILITY MODEL

The utility model mainly aims to provide an image pickup lens, which solves the problem that the image pickup lens in the prior art has wide angle, ultrathin, high image quality and small aberration which are difficult to simultaneously consider.

In order to achieve the above object, according to one aspect of the present invention, there is provided an imaging lens comprising, in order from an object side to an image side along an optical axis: a first lens having an optical power; a second lens having optical power; a third lens having a positive focal power; a fourth lens having a positive refractive power; a fifth lens having optical power; a sixth lens having a negative refractive power; the side surface of a shot object of the fourth lens is a convex surface; the object side surface of the fifth lens is a convex surface, and the image side surface of the fifth lens is a convex surface; the object side surface of the sixth lens is a concave surface, and the image side surface of the sixth lens is a concave surface; the on-axis distance TTL from the side surface of the object to be shot of the first lens to the imaging surface and the half of the diagonal length ImgH of the effective pixel area on the imaging surface satisfy the following condition: TTL/ImgH is less than 1.4.

Further, the maximum field angle FOV of the imaging lens satisfies: FOV > 80.

Further, the effective focal length f1 of the first lens and the effective focal length f2 of the second lens satisfy: -3.0 < f2/f1 < -2.0.

Further, a radius of curvature R1 of the object side surface of the first lens and a radius of curvature R2 of the image side surface of the first lens satisfy: 1.5 < (R2+ R1)/(R2-R1) < 2.0.

Further, a curvature radius R3 of the object side surface of the second lens and a curvature radius R4 of the image side surface of the second lens satisfy: 3.0 < R3/R4 < 13.5.

Further, a radius of curvature R5 of the object side surface of the third lens and a radius of curvature R6 of the image side surface of the third lens satisfy: R6/R5 is more than 1.0 and less than or equal to 2.5.

Further, the curvature radius R5 of the object side surface of the third lens, the curvature radius R10 of the image side surface of the fifth lens, and the effective focal length f5 of the fifth lens satisfy: f5/(R5+ R10) is more than 0 and less than 1.0.

Further, the central thickness CT5 of the fifth lens on the optical axis and the edge thickness ET5 of the fifth lens satisfy: 1.5 < CT5/ET5 < 4.0.

Further, the curvature radius R8 of the image side surface of the fourth lens and the effective focal length f of the imaging lens satisfy: 2.5 < R8/f < 4.5.

Further, the center thickness CT6 of the sixth lens on the optical axis and the edge thickness ET6 of the sixth lens satisfy: 0.5 < CT6/ET6 < 2.0.

Further, an on-axis distance SAG61 between an intersection point of the object side surface of the sixth lens and the optical axis to an effective radius vertex of the object side surface of the sixth lens, an on-axis distance SAG62 between an intersection point of the image side surface of the sixth lens and the optical axis to an effective radius vertex of the image side surface of the sixth lens, and a center thickness CT6 of the sixth lens on the optical axis satisfy: -4.0 < (SAG61+ SAG62)/CT6 < -1.5.

Further, an on-axis distance SAG52 between an intersection point of the image-side surface of the fifth lens and the optical axis to an effective radius vertex of the image-side surface of the fifth lens and a central thickness CT5 of the fifth lens on the optical axis satisfies: -1.5 < SAG52/CT5 < -1.0.

Further, the abbe number V2 of the second lens and the abbe number V4 of the fourth lens satisfy: v2+ V4 < 40.

Further, the central thickness CT5 of the fifth lens on the optical axis and the edge thickness ET5 of the fifth lens satisfy: 0 < ET5/CT5 < 1.0.

According to another aspect of the present invention, there is provided an imaging lens comprising, in order from an object side to an image side along an optical axis: a first lens having an optical power; a second lens having optical power; a third lens having a positive focal power; a fourth lens having a positive refractive power; a fifth lens having optical power; a sixth lens having a negative focal power; the side surface of the shot object of the fourth lens is a convex surface; the object side surface of the fifth lens is a convex surface, and the image side surface of the fifth lens is a convex surface; the object side surface of the sixth lens is a concave surface, and the image side surface of the sixth lens is a concave surface; the effective focal length f1 of the first lens and the effective focal length f2 of the second lens satisfy the following condition: -3.0 < f2/f1 < -2.0.

Further, the maximum field angle FOV of the imaging lens satisfies: FOV > 80.

Further, the on-axis distance TTL from the object side surface of the first lens to the imaging surface and the half ImgH of the diagonal length of the effective pixel area on the imaging surface satisfy: TTL/ImgH is less than 1.4; the curvature radius R1 of the object side surface of the first lens and the curvature radius R2 of the image side surface of the first lens satisfy that: 1.5 < (R2+ R1)/(R2-R1) < 2.0.

By applying the technical scheme of the utility model, the camera lens sequentially comprises a first lens, a second lens, a third lens, a fourth lens, a fifth lens and a sixth lens from a shot object side to an image side along an optical axis, wherein the first lens has focal power; the second lens has focal power; the third lens has positive focal power; the fourth lens has positive focal power; the fifth lens has focal power; the sixth lens has negative focal power; the side surface of a shot object of the fourth lens is a convex surface; the object side surface of the fifth lens is a convex surface, and the image side surface of the fifth lens is a convex surface; the object side surface of the sixth lens is a concave surface, and the image side surface of the sixth lens is a concave surface; the on-axis distance TTL from the side surface of the object to be shot of the first lens to the imaging surface and the half of the diagonal length ImgH of the effective pixel area on the imaging surface satisfy the following condition: TTL/ImgH is less than 1.4.

The third lens and the fourth lens both adopt lenses with positive focal power, so that the deflection angle of the whole light can be effectively controlled, the aberration of the whole system is easily balanced, and higher imaging quality is realized. Through the reasonable surface type that sets up fifth lens and sixth lens, be favorable to balancing the spherical aberration that preceding lens produced and the field curvature of control edge visual field, guarantee the characteristics of high image quality. The ratio of the on-axis distance TTL from the side face of a shot object of the first lens to the imaging surface to the half of the diagonal length ImgH of the effective pixel area on the imaging surface is restrained within a reasonable range, so that the size of the camera lens is effectively reduced, the ultrathin characteristic of the camera lens is ensured, and the requirement for miniaturization is met. In addition, the camera lens has the characteristics of ultrathin property, large aperture and wide angle, and has higher imaging quality and smaller aberration index.

Drawings

The accompanying drawings, which are incorporated in and constitute a part of this application, illustrate embodiments of the utility model and, together with the description, serve to explain the utility model and not to limit the utility model. In the drawings:

fig. 1 is a schematic view showing a configuration of an imaging lens according to a first example of the present invention;

fig. 2 to 5 respectively show an on-axis chromatic aberration curve, an astigmatism curve, a distortion curve, and a magnification chromatic aberration curve of the imaging lens in fig. 1;

fig. 6 is a schematic view showing a configuration of an imaging lens according to a second example of the present invention;

fig. 7 to 10 show an on-axis chromatic aberration curve, an astigmatism curve, a distortion curve, and a magnification chromatic aberration curve, respectively, of the imaging lens in fig. 6;

fig. 11 is a schematic view showing a configuration of an imaging lens according to a third example of the present invention;

fig. 12 to 15 show an on-axis chromatic aberration curve, an astigmatism curve, a distortion curve, and a magnification chromatic aberration curve, respectively, of the imaging lens in fig. 11;

fig. 16 is a schematic view showing a configuration of an imaging lens of example four of the present invention;

fig. 17 to 20 show an on-axis chromatic aberration curve, an astigmatism curve, a distortion curve, and a magnification chromatic aberration curve, respectively, of the imaging lens in fig. 16;

fig. 21 is a schematic view showing a configuration of an imaging lens of example five of the present invention;

fig. 22 to 25 show an on-axis chromatic aberration curve, an astigmatism curve, a distortion curve, and a magnification chromatic aberration curve, respectively, of the imaging lens in fig. 21;

fig. 26 is a schematic diagram showing a configuration of an imaging lens of example six of the present invention;

fig. 27 to 30 show an on-axis chromatic aberration curve, an astigmatism curve, a distortion curve, and a magnification chromatic aberration curve, respectively, of the imaging lens in fig. 26;

fig. 31 is a schematic view showing a configuration of an imaging lens of example seven of the present invention;

fig. 32 to 35 show an on-axis chromatic aberration curve, an astigmatism curve, a distortion curve, and a magnification chromatic aberration curve, respectively, of the imaging lens in fig. 31;

fig. 36 is a schematic view showing a configuration of an imaging lens of example eight of the present invention;

fig. 37 to 40 show an axial chromatic aberration curve, an astigmatism curve, a distortion curve, and a chromatic aberration of magnification curve of the imaging lens in fig. 36, respectively.

Wherein the figures include the following reference numerals:

STO, stop; e1, first lens; s1, the subject side surface of the first lens; s2, an image side surface of the first lens; e2, second lens; s3, the object side surface of the second lens; s4, an image side surface of the second lens; e3, third lens; s5, the object side surface of the third lens; s6, an image side surface of the third lens; e4, fourth lens; s7, the object side surface of the fourth lens; s8, an image side surface of the fourth lens element; e5, fifth lens; s9, the object side surface of the fifth lens; s10, an image side surface of the fifth lens element; e6, sixth lens; s11, the object side surface of the sixth lens element; s12, an image side surface of the sixth lens element; e7, optical filters; s13, the side of the object to be shot of the optical filter; s14, an image side surface of the optical filter; and S15, imaging surface.

Detailed Description

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 invention will be described in detail below with reference to the embodiments with reference to the attached drawings.

It is noted that, unless otherwise indicated, all 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.

In the present invention, unless stated to the contrary, the use of directional terms such as "upper, lower, top, bottom" or the like, generally refers to the orientation of the components as shown in the drawings, or to the vertical, perpendicular, or gravitational orientation of the components themselves; likewise, for ease of understanding and description, "inner and outer" refer to the inner and outer relative to the profile of the components themselves, but the above directional words are not intended to limit the utility model.

It should be noted that in this specification the expressions first, second, third etc. are only used 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 close to the object side becomes the object side surface of the lens, and the surface of each lens close to the image side is called the image side surface of the lens. The determination of the surface shape in the paraxial region can be performed by determining whether or not the surface shape is concave or convex, based on the R value (R denotes the radius of curvature of the paraxial region, and usually denotes the R value in a lens database (lens data) in optical software) in accordance with the determination method of a person ordinarily skilled in the art. Regarding the side of the object, when the R value is positive, the side is judged to be convex, and when the R value is negative, the side is judged to be concave; in the case of the image side surface, the image side surface is determined to be concave when the R value is positive, and is determined to be convex when the R value is negative.

The utility model provides a camera lens, aiming at solving the problem that the camera lens in the prior art is difficult to simultaneously give consideration to wide angle, ultrathin, high image quality and small aberration.

Example one

As shown in fig. 1 to 40, the imaging lens includes, in order from an object side to an image side along an optical axis, a first lens, a second lens, a third lens, a fourth lens, a fifth lens, and a sixth lens, the first lens having a power; the second lens has focal power; the third lens has positive focal power; the fourth lens has positive focal power; the fifth lens has focal power; the sixth lens has negative focal power; the side surface of a shot object of the fourth lens is a convex surface; the object side surface of the fifth lens is a convex surface, and the image side surface of the fifth lens is a convex surface; the object side surface of the sixth lens is a concave surface, and the image side surface of the sixth lens is a concave surface; the on-axis distance TTL from the side surface of the object to be shot of the first lens to the imaging surface and the half of the diagonal length ImgH of the effective pixel area on the imaging surface satisfy the following condition: TTL/ImgH is less than 1.4.

The third lens and the fourth lens both adopt lenses with positive focal power, so that the deflection angle of the whole light can be effectively controlled, the aberration of the whole system is easily balanced, and higher imaging quality is realized. By reasonably setting the surface types of the fifth lens and the sixth lens, the spherical aberration generated by the front lens can be balanced, the field curvature of the edge field of view can be controlled, and the characteristic of high image quality can be ensured. The ratio between the axial distance TTL from the side face of a shot object to an imaging surface of the first lens and the half of the diagonal length ImgH of an effective pixel area on the imaging surface is within a reasonable range, so that the size of the camera lens is effectively reduced, the ultrathin characteristic of the camera lens is ensured, and the requirement for miniaturization is met. In addition, the camera lens has the characteristics of ultrathin property, large aperture and wide angle, and has higher imaging quality and smaller aberration index.

In the present embodiment, the maximum field angle FOV of the imaging lens satisfies: FOV >80 deg. The characteristic of wide angle of the system is facilitated by setting the maximum field angle FOV of the camera lens to be more than 80 degrees. Preferably, the FOV is >81 °.

In the present embodiment, the effective focal length f1 of the first lens and the effective focal length f2 of the second lens satisfy: -3.0 < f2/f1 < -2.0. The condition is satisfied, the spherical aberration of the camera lens can be finely adjusted, the aberration of an on-axis field of view is reduced, and the imaging quality is improved. Preferably, -2.7 < f2/f1 < -2.2.

In the present embodiment, the radius of curvature R1 of the object side surface of the first lens and the radius of curvature R2 of the image side surface of the first lens satisfy: 1.5 < (R2+ R1)/(R2-R1) < 2.0. The conditional expression is satisfied, the deflection angle of the system edge light can be reasonably controlled, and the sensitivity of the system is effectively reduced. Preferably 1.5 < (R2+ R1)/(R2-R1) < 1.9.

In the present embodiment, the radius of curvature R3 of the object side surface of the second lens and the radius of curvature R4 of the image side surface of the second lens satisfy: 3.0 < R3/R4 < 13.5. The conditional expression is satisfied, the refraction angle of the system light beam on the second lens can be effectively controlled, and the good processing characteristic of the system is realized. Preferably 3.2 < R3/R4 < 13.1.

In the present embodiment, a radius of curvature R5 of the object side surface of the third lens and a radius of curvature R6 of the image side surface of the third lens satisfy: R6/R5 is more than 1.0 and less than or equal to 2.5. The condition is satisfied, the refraction angle of the system light beam on the third lens can be effectively controlled, the aberration of the system can be balanced easily, and the imaging quality of the system is improved. Preferably, 1.3 < R6/R5 ≦ 2.5.

In the present embodiment, the radius of curvature R5 of the object side surface of the third lens, the radius of curvature R10 of the image side surface of the fifth lens, and the effective focal length f5 of the fifth lens satisfy: f5/(R5+ R10) is more than 0 and less than 1.0. Satisfying this conditional expression, can controlling its third-order coma in reasonable within range, and then can balance the coma volume that front end optical lens produced for the system has good image quality. Preferably, 0.2 < f5/(R5+ R10) < 0.6.

In the present embodiment, the center thickness CT5 of the fifth lens on the optical axis and the edge thickness ET5 of the fifth lens satisfy: 1.5 < CT5/ET5 < 4.0. Satisfying this conditional expression can reduce the sensitivity of the fifth lens as a whole and improve the workability of the fifth lens. Preferably, 1.8 < CT5/ET5 < 3.8.

In the present embodiment, a radius of curvature R8 of the image-side surface of the fourth lens and the effective focal length f of the imaging lens satisfy: 2.5 < R8/f < 4.5. The method meets the conditional expression, can effectively control the astigmatism of the system, and further can improve the imaging quality of the off-axis view field. Preferably, 2.6 < R8/f < 4.4.

In the present embodiment, the center thickness CT6 of the sixth lens on the optical axis and the edge thickness ET6 of the sixth lens satisfy: 0.5 < CT6/ET6 < 2.0. Satisfying this conditional expression can reduce the sensitivity of the entire sixth lens and improve the workability of the sixth lens. Preferably 0.6 < CT6/ET6 < 1.6.

In the present embodiment, the on-axis distance SAG61 between the intersection point of the object side surface of the sixth lens and the optical axis to the effective radius vertex of the object side surface of the sixth lens, the on-axis distance SAG62 between the intersection point of the image side surface of the sixth lens and the optical axis to the effective radius vertex of the image side surface of the sixth lens, and the central thickness CT6 of the sixth lens on the optical axis satisfy: -4.0 < (SAG61+ SAG62)/CT6 < -1.5. The condition is satisfied, the sensitivity of the tolerance of the sixth lens can be effectively reduced, and the manufacturability is improved. Preferably, -3.7 < (SAG61+ SAG62)/CT6 < -1.8.

In the present embodiment, an on-axis distance SAG52 between an intersection point of the image-side surface of the fifth lens and the optical axis to an effective radius vertex of the image-side surface of the fifth lens and a central thickness CT5 of the fifth lens on the optical axis satisfies: -1.5 < SAG52/CT5 < -1.0. By controlling the position relation of the fifth lens on the optical axis, the problem of curvature of field sensitivity of the whole camera lens is effectively improved, and the astigmatism and coma contribution of the fifth lens in the whole system are reduced. Preferably, -1.5 < SAG52/CT5 < -1.1.

In the present embodiment, the abbe number V2 of the second lens and the abbe number V4 of the fourth lens satisfy: v2+ V4 < 40. The refractive index difference between the materials of the second lens and the fourth lens can be effectively controlled when the conditional expression is met, so that the marginal light rays are in stable transition, and the performance of a marginal field of view is improved; meanwhile, the integral optical structure is prevented from being too large in offset, and the manufacturability is improved. Preferably, V2+ V4 is 38.40.

In the present embodiment, the center thickness CT5 of the fifth lens on the optical axis and the edge thickness ET5 of the fifth lens satisfy: 0 < ET5/CT5 < 1.0. Satisfying the conditional expression can reduce the overall sensitivity of the fifth lens and improve the processability and mass productivity of the fifth lens. Preferably, 0.2 < ET5/CT5 < 0.6.

Example two

As shown in fig. 1 to 40, the imaging lens includes, in order from an object side to an image side along an optical axis, a first lens, a second lens, a third lens, a fourth lens, a fifth lens, and a sixth lens, the first lens having a power; the second lens has focal power; the third lens has positive focal power; the fourth lens has positive focal power; the fifth lens has focal power; the sixth lens has negative focal power; the side surface of the shot object of the fourth lens is a convex surface; the object side surface of the fifth lens is a convex surface, and the image side surface of the fifth lens is a convex surface; the object side surface of the sixth lens is a concave surface, and the image side surface of the sixth lens is a concave surface; the effective focal length f1 of the first lens and the effective focal length f2 of the second lens satisfy that: -3.0 < f2/f1 < -2.0.

Preferably, -2.7 < f2/f1 < -2.2.

The third lens and the fourth lens both adopt lenses with positive focal power, so that the deflection angle of the whole light can be effectively controlled, the aberration of the whole system is easily balanced, and higher imaging quality is realized. Through the reasonable surface type that sets up fifth lens and sixth lens, be favorable to balancing the spherical aberration that preceding lens produced and the field curvature of control edge visual field, guarantee the characteristics of high image quality. By controlling the ratio of the effective focal length f2 of the second lens to the effective focal length f1 of the first lens within a reasonable range, the spherical aberration of the camera lens can be finely adjusted, the aberration of an on-axis field of view is reduced, and the imaging quality is improved. In addition, the camera lens has the characteristics of ultrathin property, large aperture and wide angle, and has higher imaging quality and smaller aberration index.

In the present embodiment, the maximum field angle FOV of the imaging lens satisfies: FOV > 80. The characteristic of wide angle of the system is facilitated by setting the maximum field angle FOV of the camera lens to be more than 80 degrees. Preferably, the FOV is >81 °.

In this embodiment, an on-axis distance TTL from the object side surface of the first lens to the imaging plane and a half ImgH of a diagonal length of the effective pixel area on the imaging plane satisfy: TTL/ImgH is less than 1.4. The ratio of the on-axis distance TTL from the side face of a shot object of the first lens to the imaging surface to the half of the diagonal length ImgH of the effective pixel area on the imaging surface is restrained within a reasonable range, so that the size of the camera lens is effectively reduced, the ultrathin characteristic of the camera lens is ensured, and the requirement for miniaturization is met.

In the present embodiment, a radius of curvature R3 of the object side surface of the second lens and a radius of curvature R4 of the image side surface of the second lens satisfy: 3.0 < R3/R4 < 13.5. The conditional expression is satisfied, the refraction angle of the system light beam on the second lens can be effectively controlled, and the good processing characteristic of the system is realized. Preferably 3.2 < R3/R4 < 13.1.

In the present embodiment, a radius of curvature R8 of the image-side surface of the fourth lens and the effective focal length f of the imaging lens satisfy: 2.5 < R8/f < 4.5. The astigmatism of the system can be effectively controlled by meeting the conditional expression, and the imaging quality of the off-axis field of view can be further improved. Preferably, 2.6 < R8/f < 4.4.

In the present embodiment, an on-axis distance SAG52 between an intersection point of the image-side surface of the fifth lens and the optical axis to an effective radius vertex of the image-side surface of the fifth lens and a central thickness CT5 of the fifth lens on the optical axis satisfies: -1.5 < SAG52/CT5 < -1.0. By controlling the position relation of the fifth lens on the optical axis, the problem of curvature of field sensitivity of the whole camera lens is effectively improved, and the astigmatism and coma contribution of the fifth lens in the whole system is reduced. Preferably, -1.5 < SAG52/CT5 < -1.1.

In the present embodiment, the center thickness CT5 of the fifth lens on the optical axis and the edge thickness ET5 of the fifth lens satisfy: 0 < ET5/CT5 < 1.0. Satisfying the conditional expression can reduce the overall sensitivity of the fifth lens element, and improve the processability and mass productivity of the fifth lens element. Preferably, 0.2 < ET5/CT5 < 0.6.

The above-described image pickup lens may further optionally include a filter for correcting color deviation or a protective glass for protecting a photosensitive element located on the image forming surface.

The imaging lens in the present application may employ a plurality of lenses, for example, the above-described six lenses. By reasonably distributing the focal power and the surface shape of each lens, the central thickness of each lens, the axial distance between each lens and the like, the sensitivity of the lens can be effectively reduced, the machinability of the lens can be improved, and the camera lens is more beneficial to production and processing and can be suitable for portable electronic equipment such as a smart phone. The left side is the object side and the right side is the image side.

In the present application, at least one of the mirror surfaces of each lens is an aspherical mirror surface. The aspheric lens is characterized in that: the curvature varies continuously from the center of the lens to the periphery of the lens. Unlike a spherical lens having a constant curvature from the center of the lens 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 during imaging can be eliminated as much as possible, thereby improving the imaging quality.

However, it will be appreciated by those skilled in the art that the number of lenses making up the imaging lens can be varied to achieve the various results and advantages described in this specification without departing from the claimed subject matter. For example, although six lenses are exemplified in the embodiment, the imaging lens is not limited to including six lenses. The camera lens may also include other numbers of lenses, as desired.

Examples of specific surface types and parameters of the imaging lens applicable to the above embodiments are further described below with reference to the drawings.

It should be noted that any one of the following examples one to eight is applicable to all embodiments of the present application.

Example one

As shown in fig. 1 to 5, an imaging lens of the first example of the present application is described. Fig. 1 shows a schematic diagram of an imaging lens structure of example one.

As shown in fig. 1, the imaging lens includes, in order from an object side to an image side: a stop STO, a first lens E1, a second lens E2, a stop STO, a third lens E3, a fourth lens E4, a fifth lens E5, a sixth lens E6, a filter E7, and an image plane S15.

The first lens element E1 has positive refractive power, and the object side surface S1 of the first lens element is convex, and the image side surface S2 of the first lens element is concave. The second lens element E2 has negative power, and the object-side surface S3 of the second lens element is convex, and the image-side surface S4 of the second lens element is concave. The third lens element E3 has positive refractive power, and the object side surface S5 of the third lens element is convex, and the image side surface S6 of the third lens element is concave. The fourth lens element E4 has positive refractive power, and the object side surface S7 of the fourth lens element is convex, and the image side surface S8 of the fourth lens element is concave. The fifth lens element E5 has positive refractive power, and the object side surface S9 of the fifth lens element is a convex surface, and the image side surface S10 of the fifth lens element is a convex surface. The sixth lens element E6 has negative refractive power, and the object side surface S11 of the sixth lens element is concave, and the image side surface S12 of the sixth lens element is concave. The filter E7 has a filter object side surface S13 and a filter image side surface S14. The light from the object passes through the respective surfaces S1 to S14 in order and is finally imaged on the imaging surface S15.

In this example, the total effective focal length f of the camera lens is 4.74mm, the half Semi-FOV of the maximum field angle of the camera lens is 41.1 °, the total system length TTL of the camera lens is 5.32mm and the image height ImgH is 4.19 mm.

Table 1 shows a basic structural parameter table of the imaging lens of example one, in which the unit of the radius of curvature and the thickness/distance are millimeters (mm).

TABLE 1

In the first example, the object-side surface and the image-side surface of any one of the first lens E1 to the sixth lens E6 are both aspheric surfaces, and the surface shape of each aspheric lens can be defined by, but is not limited to, the following aspheric surface formula:

wherein x is the distance rise from the vertex of the aspheric surface when the aspheric surface is at the position with the height of h along the optical axis direction; c is the paraxial curvature of the aspheric surface, c being 1/R (i.e., paraxial curvature c is the inverse of radius of curvature R in table 1 above); k is a conic coefficient; ai is the correction coefficient of the i-th order of the aspherical surface. Table 2 below gives the high-order coefficient A4, A6, A8, A10, A12, A14, A16, A18, A20 that can be used for each of the aspherical mirrors S1-S12 in example one.

Flour mark

A4

A6

A8

A10

A12

A14

A16

A18

A20

S1

1.8520E-01

-2.2112E-03

-1.9461E-03

-1.0812E-03

-3.6189E-04

-9.0849E-05

-2.8152E-05

-1.1848E-06

-5.1864E-06

S2

-4.0255E-02

8.4962E-04

-1.7477E-03

-1.1529E-04

-1.1462E-04

-3.6886E-05

1.2759E-05

2.1646E-05

1.0381E-05

S3

2.6089E-02

1.7280E-02

-3.5080E-04

7.3938E-04

-7.8774E-05

-4.1269E-05

6.0516E-06

1.3533E-05

9.5848E-06

S4

5.2729E-02

1.2811E-02

8.9977E-04

7.7497E-04

1.8042E-04

6.1013E-05

1.5845E-05

5.5302E-06

-2.0061E-06

S5

-1.3408E-01

-3.4600E-03

4.0388E-04

9.0154E-04

2.5676E-04

1.0188E-04

3.7309E-05

1.4778E-05

1.3783E-05

S6

-2.0751E-01

9.1378E-03

4.9618E-03

2.5004E-03

1.7335E-04

-4.7928E-05

-7.2228E-05

-3.4488E-05

-1.8898E-06

S7

-3.3739E-01

6.9187E-02

-1.3915E-03

-1.6692E-03

-1.3223E-03

3.4951E-04

1.9912E-04

-8.2603E-05

-1.0369E-05

S8

-4.3593E-01

1.1022E-01

-1.6323E-02

-3.1246E-03

-4.7054E-04

4.1547E-04

1.4911E-05

-1.6001E-04

1.0553E-05

S9

-8.2007E-01

-6.9397E-02

6.9488E-02

1.2915E-03

-1.3171E-02

-1.4207E-02

-5.5998E-03

-1.9373E-03

-1.3531E-04

S10

1.4662E-01

-2.2776E-01

9.1998E-02

4.9378E-03

2.0805E-02

4.8475E-03

4.5376E-03

-7.4912E-05

3.6410E-04

S11

6.2772E-01

2.1324E-01

-1.4167E-01

5.7849E-02

-1.5032E-02

-3.6780E-03

5.1015E-03

-2.2551E-03

4.7039E-04

S12

-1.8403E+00

2.9800E-01

-2.6849E-02

3.5683E-02

-2.4796E-02

-4.6179E-03

-6.9682E-04

4.5527E-04

2.0289E-04

TABLE 2

Fig. 2 shows an axial chromatic aberration curve of the imaging lens of the first example, which shows the deviation of the convergent focal points of the light rays of different wavelengths after passing through the imaging lens. Fig. 3 shows astigmatism curves of the imaging lens of the first example, which represent meridional field curvature and sagittal field curvature. Fig. 4 shows distortion curves of the imaging lens of example one, which indicate distortion magnitude values corresponding to different angles of view. Fig. 5 shows a chromatic aberration of magnification curve of the imaging lens of the first example, which shows the deviation of different image heights on the image formation plane after the light passes through the imaging lens.

As can be seen from fig. 2 to 5, the imaging lens according to the first example can achieve good imaging quality.

Example two

As shown in fig. 6 to 10, an imaging lens of example two of the present application is described. In this example and the following examples, descriptions of parts similar to example one will be omitted for the sake of brevity. Fig. 6 shows a schematic diagram of the imaging lens structure of example two.

As shown in fig. 6, the image capturing lens includes, in order from an object side to an image side: a stop STO, a first lens E1, a second lens E2, a stop STO, a third lens E3, a fourth lens E4, a fifth lens E5, a sixth lens E6, a filter E7, and an image plane S15.

The first lens element E1 has positive refractive power, and the object side surface S1 of the first lens element is convex, and the image side surface S2 of the first lens element is concave. The second lens element E2 has negative refractive power, and the object side surface S3 of the second lens element is convex, and the image side surface S4 of the second lens element is concave. The third lens element E3 has positive refractive power, and the object side surface S5 of the third lens element is convex, and the image side surface S6 of the third lens element is concave. The fourth lens element E4 has positive refractive power, and the object side surface S7 of the fourth lens element is convex, and the image side surface S8 of the fourth lens element is concave. The fifth lens element E5 has positive refractive power, and the object side surface S9 of the fifth lens element is a convex surface, and the image side surface S10 of the fifth lens element is a convex surface. The sixth lens element E6 has negative refractive power, and the object side surface S11 of the sixth lens element is concave, and the image side surface S12 of the sixth lens element is concave. The filter E7 has a filter object side surface S13 and a filter image side surface S14. The light from the object passes through the respective surfaces S1 to S14 in order and is finally imaged on the imaging surface S15.

In this example, the total effective focal length f of the camera lens is 4.65mm, the half Semi-FOV of the maximum field angle of the camera lens is 41.3 °, the total system length TTL of the camera lens is 5.32mm and the image height ImgH is 4.19 mm.

Table 3 shows a basic structural parameter table of the imaging lens of example two, in which the unit of the radius of curvature and the thickness/distance are millimeters (mm).

TABLE 3

Table 4 shows the high-order term coefficients that can be used for each aspherical mirror surface in example two, wherein each aspherical mirror surface type can be defined by formula (1) given in example one above.

TABLE 4

Fig. 7 shows an axial chromatic aberration curve of the imaging lens of example two, which shows the deviation of the convergent focus of light rays of different wavelengths after passing through the imaging lens. Fig. 8 shows astigmatism curves representing meridional field curvature and sagittal field curvature of the imaging lens of example two. Fig. 9 shows distortion curves of the imaging lens of example two, which show values of distortion magnitudes corresponding to different angles of view. Fig. 10 shows a chromatic aberration of magnification curve of the imaging lens of the second example, which shows the deviation of different image heights on the image forming surface after the light passes through the imaging lens.

As can be seen from fig. 7 to 10, the imaging lens according to example two can achieve good imaging quality.

Example III

As shown in fig. 11 to 15, an imaging lens of example three of the present application is described. Fig. 11 shows a schematic diagram of an imaging lens structure of example three.

As shown in fig. 11, the imaging lens includes, in order from an object side to an image side: the stop STO, the first lens E1, the second lens E2, the stop STO, the third lens E3, the fourth lens E4, the fifth lens E5, the sixth lens E6, the filter E7, and the image plane S15.

The first lens element E1 has positive refractive power, and the object side surface S1 of the first lens element is convex, and the image side surface S2 of the first lens element is concave. The second lens element E2 has negative refractive power, and the object side surface S3 of the second lens element is convex, and the image side surface S4 of the second lens element is concave. The third lens E3 has positive refractive power, and the object side surface S5 of the third lens is a convex surface, and the image side surface S6 of the third lens is a concave surface. The fourth lens element E4 has positive refractive power, and the object side surface S7 of the fourth lens element is convex, and the image side surface S8 of the fourth lens element is concave. The fifth lens element E5 has positive refractive power, and the object side surface S9 of the fifth lens element is a convex surface, and the image side surface S10 of the fifth lens element is a convex surface. The sixth lens element E6 has negative refractive power, and the object side surface S11 of the sixth lens element is concave, and the image side surface S12 of the sixth lens element is concave. The filter E7 has a filter object side surface S13 and a filter image side surface S14. The light from the object passes through the respective surfaces S1 to S14 in order and is finally imaged on the imaging surface S15.

In this example, the total effective focal length f of the camera lens is 4.67mm, the half Semi-FOV of the maximum field angle of the camera lens is 41.4 °, the total system length TTL of the camera lens is 5.33mm and the image height ImgH is 4.19 mm.

Table 5 shows a basic structural parameter table of the imaging lens of example three, in which the unit of the radius of curvature and the thickness/distance are millimeters (mm).

TABLE 5

Table 6 shows the high-order term coefficients that can be used for each aspherical mirror surface in example three, wherein each aspherical mirror surface type can be defined by formula (1) given in example one above.

Flour mark

A4

A6

A8

A10

A12

A14

A16

A18

A20

S1

1.9848E-01

-3.4088E-03

-3.2022E-03

-1.7347E-03

-5.8282E-04

-1.6057E-04

-4.6701E-05

-5.2021E-06

-1.7771E-06

S2

-4.7291E-02

4.2453E-04

-2.5589E-03

-2.1171E-04

-2.6773E-04

-1.3970E-04

-3.4323E-05

1.3784E-06

3.0902E-06

S3

3.4977E-02

2.0705E-02

-7.5383E-05

1.1086E-03

-2.0744E-04

-1.2685E-04

-5.1241E-05

-1.7250E-05

-6.0336E-06

S4

6.6845E-02

1.6951E-02

2.1296E-03

1.5160E-03

4.4427E-04

1.6483E-04

5.4074E-05

1.7119E-05

3.8522E-06

S5

-1.5567E-01

-2.2069E-03

2.2371E-03

2.1398E-03

8.1783E-04

3.8307E-04

1.7152E-04

8.7604E-05

4.1225E-05

S6

-2.3580E-01

1.7345E-02

9.4859E-03

3.9025E-03

1.6251E-04

-1.9098E-04

-1.4880E-04

-4.1349E-05

1.6342E-05

S7

-3.8162E-01

9.1729E-02

-7.7830E-03

-4.9244E-03

-1.4917E-03

7.8356E-04

-1.0532E-04

-3.0561E-04

-3.4348E-05

S8

-4.8027E-01

1.2600E-01

-2.8619E-02

-5.3797E-03

-3.5172E-04

2.9642E-04

-4.6700E-04

-2.7648E-04

3.9136E-05

S9

-6.8191E-01

-8.4445E-02

5.2165E-02

1.4605E-02

3.5808E-03

-2.4353E-03

-1.2834E-03

-8.2131E-04

-8.3337E-05

S10

1.5699E-01

-2.1116E-01

6.2570E-02

-4.2703E-03

9.1846E-03

1.1552E-03

2.0554E-03

-2.6569E-04

2.0002E-04

S11

7.5518E-01

2.0724E-01

-1.5317E-01

6.5758E-02

-2.0890E-02

-2.0141E-03

5.5618E-03

-3.0218E-03

7.6201E-04

S12

-1.9109E+00

2.9701E-01

-2.7614E-02

3.2912E-02

-2.7671E-02

-5.0347E-03

-9.6483E-04

1.5024E-04

-5.1492E-05

TABLE 6

Fig. 12 shows an axial chromatic aberration curve of the imaging lens of example three, which shows the deviation of the convergent focus of light rays of different wavelengths after passing through the imaging lens. Fig. 13 shows astigmatism curves representing meridional field curvature and sagittal field curvature of the imaging lens of example three. Fig. 14 shows distortion curves of the imaging lens of example three, which show distortion magnitude values corresponding to different angles of view. Fig. 15 shows a chromatic aberration of magnification curve of the imaging lens of example three, which represents the deviation of different image heights on the imaging surface after the light passes through the imaging lens.

As can be seen from fig. 12 to 15, the imaging lens according to the third example can achieve good imaging quality.

Example four

As shown in fig. 16 to 20, an imaging lens of the present example four is described. Fig. 16 shows a schematic diagram of an imaging lens structure of example four.

As shown in fig. 16, the imaging lens includes, in order from an object side to an image side: a stop STO, a first lens E1, a second lens E2, a stop STO, a third lens E3, a fourth lens E4, a fifth lens E5, a sixth lens E6, a filter E7, and an image plane S15.

In this example, the total effective focal length f of the camera lens is 4.64mm, the half Semi-FOV of the maximum field angle of the camera lens is 41.1 °, the total system length TTL of the camera lens is 5.32mm and the image height ImgH is 4.15 mm.

Table 7 shows a basic structural parameter table of the imaging lens of example four, in which the unit of the radius of curvature and the thickness/distance are millimeters (mm).

TABLE 7

Table 8 shows the high-order term coefficients that can be used for each aspherical mirror in example four, wherein each aspherical mirror type can be defined by formula (1) given in example one above.

Flour mark

A4

A6

A8

A10

A12

A14

A16

A18

A20

S1

1.7289E-01

-6.1615E-04

-1.5176E-03

-9.3491E-04

-3.2921E-04

-8.7269E-05

-2.4656E-05

-2.5802E-06

-5.7451E-06

S2

-3.6967E-02

1.2079E-03

-1.6527E-03

-7.2255E-05

-1.1012E-04

-5.5025E-05

-6.8711E-06

9.1498E-06

3.3701E-06

S3

2.3511E-02

1.5515E-02

-4.2635E-04

7.3886E-04

-8.7372E-05

-6.1277E-05

-2.0475E-05

-7.7771E-06

-1.8071E-06

S4

5.7219E-02

1.3378E-02

1.2625E-03

9.2664E-04

2.1347E-04

7.1961E-05

1.4780E-05

4.2873E-06

-2.6570E-06

S5

-1.4826E-01

-1.8182E-03

1.6744E-03

1.7437E-03

4.2525E-04

1.9716E-04

1.6525E-05

2.0754E-05

-1.8296E-06

S6

-2.2720E-01

1.5827E-02

8.1342E-03

3.7868E-03

2.9279E-04

2.3347E-05

-9.4455E-05

-9.1134E-06

2.7891E-07

S7

-3.7093E-01

8.6328E-02

-6.1339E-03

-3.2227E-03

-6.2930E-04

9.2383E-04

1.3076E-04

-1.2605E-04

1.6368E-05

S8

-4.5716E-01

1.2131E-01

-2.1295E-02

-4.2648E-03

3.8827E-04

8.7912E-04

-5.8351E-05

-9.8998E-05

7.1005E-05

S9

-6.5696E-01

-1.0490E-01

4.8028E-02

8.3818E-03

1.2901E-03

-9.8301E-04

-4.3751E-04

-7.8276E-04

-1.4462E-04

S10

2.1247E-01

-2.3406E-01

6.2075E-02

-1.3712E-02

5.3342E-03

2.3520E-03

1.5605E-03

-5.6756E-04

3.3280E-04

S11

7.3340E-01

2.1625E-01

-1.4248E-01

7.1395E-02

-2.2278E-02

-2.5062E-03

6.0101E-03

-3.0094E-03

6.3117E-04

S12

-1.7212E+00

2.5890E-01

-3.8469E-02

5.8806E-02

-4.7334E-03

-4.1236E-03

-2.7913E-03

-9.3519E-04

-3.8087E-04

TABLE 8

Fig. 17 shows an on-axis chromatic aberration curve of the imaging lens of example four, which shows the deviation of the convergent focus of light rays of different wavelengths after passing through the imaging lens. Fig. 18 shows astigmatism curves representing meridional field curvature and sagittal field curvature of the imaging lens of example four. Fig. 19 shows distortion curves of the imaging lens of example four, which show values of distortion magnitudes corresponding to different angles of view. Fig. 20 shows a chromatic aberration of magnification curve of the imaging lens of example four, which represents a deviation of different image heights on the imaging plane after light passes through the imaging lens.

As can be seen from fig. 17 to 20, the imaging lens according to example four can achieve good imaging quality.

Example five

As shown in fig. 21 to 25, an imaging lens of example five of the present application is described. Fig. 21 shows a schematic diagram of an imaging lens structure of example five.

As shown in fig. 21, the imaging lens includes, in order from an object side to an image side: a stop STO, a first lens E1, a second lens E2, a stop STO, a third lens E3, a fourth lens E4, a fifth lens E5, a sixth lens E6, a filter E7, and an image plane S15.

The first lens element E1 has positive refractive power, and the object side surface S1 of the first lens element is convex, and the image side surface S2 of the first lens element is concave. The second lens element E2 has negative refractive power, and the object side surface S3 of the second lens element is convex, and the image side surface S4 of the second lens element is concave. The third lens element E3 has positive refractive power, and the object side surface S5 of the third lens element is convex, and the image side surface S6 of the third lens element is concave. The fourth lens element E4 has positive refractive power, and the object side surface S7 of the fourth lens element is convex, and the image side surface S8 of the fourth lens element is concave. The fifth lens element E5 has positive refractive power, and the object side surface S9 of the fifth lens element is a convex surface, and the image side surface S10 of the fifth lens element is a convex surface. The sixth lens element E6 has negative refractive power, and the object side surface S11 of the sixth lens element is a concave surface, and the image side surface S12 of the sixth lens element is a concave surface. The filter E7 has a filter object side surface S13 and a filter image side surface S14. The light from the object passes through the respective surfaces S1 to S14 in order and is finally imaged on the imaging surface S15.

In this example, the total effective focal length f of the camera lens is 4.70mm, the half Semi-FOV of the maximum field angle of the camera lens is 40.8 °, the total system length TTL of the camera lens is 5.35mm and the image height ImgH is 4.00 mm.

Table 9 shows a basic structural parameter table of the imaging lens of example five, in which the units of the radius of curvature and the thickness/distance are millimeters (mm).

TABLE 9

Table 10 shows the high-order term coefficients that can be used for each aspherical mirror surface in example five, wherein each aspherical mirror surface type can be defined by formula (1) given in example one above.

Flour mark

A4

A6

A8

A10

A12

A14

A16

A18

A20

S1

1.8809E-01

-1.7826E-03

-2.3661E-03

-1.3280E-03

-4.5034E-04

-1.2093E-04

-3.2737E-05

-5.9545E-06

-5.0968E-06

S2

-3.9216E-02

1.1850E-03

-1.8792E-03

-7.6191E-05

-1.6401E-04

-7.3113E-05

-2.9968E-06

1.2487E-05

6.0614E-06

S3

2.7846E-02

1.6979E-02

-2.1188E-04

8.6646E-04

-1.3395E-04

-7.4610E-05

-2.6323E-05

-8.3521E-06

-1.4007E-06

S4

5.3855E-02

1.2497E-02

1.0139E-03

8.5491E-04

1.8570E-04

6.7476E-05

1.6541E-05

5.6447E-06

-1.7588E-06

S5

-1.3271E-01

-3.0378E-03

3.0848E-04

1.0449E-03

2.0651E-04

1.2624E-04

3.3252E-06

1.7750E-05

2.5175E-06

S6

-2.0552E-01

8.7771E-03

4.6928E-03

2.5970E-03

2.2200E-04

2.3498E-05

-6.9646E-05

-2.0902E-05

-1.2457E-06

S7

-3.4303E-01

6.9516E-02

-1.7007E-03

-1.8792E-03

-1.2466E-03

3.9555E-04

1.7089E-04

-6.9811E-05

-1.1953E-05

S8

-4.4418E-01

1.1141E-01

-1.6172E-02

-3.4936E-03

-3.5747E-04

5.5423E-04

7.7758E-06

-1.3841E-04

7.3375E-06

S9

-8.3437E-01

-7.6666E-02

7.1642E-02

3.2180E-03

-1.3486E-02

-1.5128E-02

-7.3446E-03

-2.7036E-03

-2.8221E-04

S10

1.1762E-01

-2.1389E-01

8.5003E-02

5.9156E-03

1.7155E-02

4.6006E-03

3.2088E-03

1.0700E-04

4.7674E-04

S11

5.9988E-01

2.0918E-01

-1.4124E-01

5.8455E-02

-1.3703E-02

-3.9821E-03

5.1803E-03

-2.2525E-03

4.1506E-04

S12

-1.8411E+00

2.8616E-01

-3.2545E-02

3.5459E-02

-2.1554E-02

-3.1755E-03

-5.6862E-05

1.0048E-04

8.0062E-05

Watch 10

Fig. 22 shows an on-axis chromatic aberration curve of the imaging lens of example five, which shows the deviation of the convergent focus of light rays of different wavelengths after passing through the imaging lens. Fig. 23 shows astigmatism curves representing meridional field curvature and sagittal field curvature of the imaging lens of example five. Fig. 24 shows distortion curves of the imaging lens of example five, which show distortion magnitude values corresponding to different angles of view. Fig. 25 shows a chromatic aberration of magnification curve of the imaging lens of example five, which represents a deviation of different image heights on the imaging surface after light passes through the imaging lens.

As can be seen from fig. 22 to 25, the imaging lens according to example five can achieve good imaging quality.

Example six

As shown in fig. 26 to 30, an imaging lens of example six of the present application is described. Fig. 26 shows a schematic diagram of an imaging lens structure of example six.

As shown in fig. 26, the imaging lens includes, in order from an object side to an image side: a stop STO, a first lens E1, a second lens E2, a stop STO, a third lens E3, a fourth lens E4, a fifth lens E5, a sixth lens E6, a filter E7, and an image plane S15.

The first lens E1 has positive refractive power, and the object side surface S1 of the first lens is a convex surface, and the image side surface S2 of the first lens is a concave surface. The second lens element E2 has negative refractive power, and the object side surface S3 of the second lens element is convex, and the image side surface S4 of the second lens element is concave. The third lens element E3 has positive refractive power, and the object side surface S5 of the third lens element is convex, and the image side surface S6 of the third lens element is concave. The fourth lens element E4 has positive refractive power, and the object side surface S7 of the fourth lens element is convex, and the image side surface S8 of the fourth lens element is concave. The fifth lens element E5 has positive refractive power, and the object side surface S9 of the fifth lens element is a convex surface, and the image side surface S10 of the fifth lens element is a convex surface. The sixth lens element E6 has negative refractive power, and the object side surface S11 of the sixth lens element is concave, and the image side surface S12 of the sixth lens element is concave. The filter E7 has a filter object side surface S13 and a filter image side surface S14. The light from the object passes through the respective surfaces S1 to S14 in order and is finally imaged on the imaging surface S15.

In this example, the total effective focal length f of the imaging lens is 4.32mm, the Semi-FOV, which is the half of the maximum field angle of the imaging lens, is 42.9 °, the total system length TTL of the imaging lens is 5.21mm, and the image height ImgH is 4.15 mm.

Table 11 shows a basic structural parameter table of the imaging lens of example six, in which the units of the radius of curvature and the thickness/distance are millimeters (mm).

TABLE 11

Table 12 shows the high-order term coefficients that can be used for each of the aspherical mirror surfaces in example six, wherein each aspherical mirror surface type can be defined by formula (1) given in example one above.

Flour mark

A4

A6

A8

A10

A12

A14

A16

A18

A20

S1

1.8988E-01

1.2339E-04

-4.5930E-03

-3.6331E-03

-2.6598E-03

-1.7071E-03

-1.0351E-03

-4.5393E-04

-1.4767E-04

S2

-3.2543E-02

3.7760E-03

-5.6142E-03

-7.0018E-03

-6.6708E-03

-4.6178E-03

-2.5592E-03

-1.0593E-03

-2.8504E-04

S3

3.0958E-02

2.4830E-02

1.7185E-03

-1.6858E-03

-3.4273E-03

-2.5952E-03

-1.5007E-03

-6.2762E-04

-1.7690E-04

S4

5.9947E-02

1.6033E-02

4.2652E-03

2.7472E-03

1.3274E-03

7.1247E-04

3.4772E-04

1.5065E-04

4.1504E-05

S5

-1.4368E-01

-9.6473E-03

2.2137E-03

2.4722E-03

1.3616E-03

5.7993E-04

2.2961E-04

6.1290E-05

2.5478E-05

S6

-2.1539E-01

8.3884E-03

1.1626E-02

5.6367E-03

1.3115E-03

1.6174E-04

-1.4918E-04

-9.9296E-05

-4.0587E-05

S7

-3.7572E-01

7.7228E-02

-5.1262E-03

-5.4777E-03

-1.5731E-03

8.2988E-04

-1.4133E-04

-2.4927E-04

-5.4475E-05

S8

-4.5760E-01

1.1826E-01

-1.9795E-02

-7.0004E-03

-1.0612E-04

1.0123E-03

-4.2578E-04

-1.7897E-04

8.6572E-05

S9

-6.4351E-01

-6.2386E-02

5.1972E-02

9.4693E-03

-5.1739E-03

-4.3341E-04

-1.4110E-04

-5.4669E-04

-3.1030E-04

S10

3.2899E-01

-2.5992E-01

4.0225E-02

-1.0257E-02

9.8157E-05

7.5267E-03

-1.0155E-03

-2.6933E-03

-6.3353E-04

S11

7.4586E-01

2.2225E-01

-1.4155E-01

6.7140E-02

-1.3443E-02

-4.4787E-03

3.1518E-03

2.3972E-05

-2.4694E-04

S12

-1.6592E+00

2.7002E-01

-1.0225E-02

6.5134E-02

6.7760E-03

6.8683E-03

-2.2216E-03

-1.4636E-03

-1.6197E-03

TABLE 12

Fig. 27 shows an on-axis chromatic aberration curve of the imaging lens of example six, which shows the deviation of the convergent focal points of light rays of different wavelengths after passing through the imaging lens. Fig. 28 shows astigmatism curves representing meridional field curvature and sagittal field curvature of the imaging lens of example six. Fig. 29 shows distortion curves of the imaging lens of example six, which indicate distortion magnitude values corresponding to different angles of view. Fig. 30 shows a chromatic aberration of magnification curve of the imaging lens of example six, which represents a deviation of different image heights on the imaging surface after light passes through the imaging lens.

As can be seen from fig. 27 to 30, the imaging lens according to example six can achieve good image quality.

Example seven

As shown in fig. 31 to 35, an imaging lens of example seven of the present application is described. Fig. 31 shows a schematic diagram of an imaging lens structure of example seven.

As shown in fig. 31, the imaging lens includes, in order from an object side to an image side: a stop STO, a first lens E1, a second lens E2, a stop STO, a third lens E3, a fourth lens E4, a fifth lens E5, a sixth lens E6, a filter E7, and an image plane S15.

In this example, the total effective focal length f of the camera lens is 4.58mm, the half Semi-FOV of the maximum field angle of the camera lens is 41.3 °, the total system length TTL of the camera lens is 5.39mm and the image height ImgH is 4.15 mm.

Table 13 shows a basic structural parameter table of the imaging lens of example seven, in which the units of the radius of curvature and the thickness/distance are millimeters (mm).

Watch 13

Table 14 shows the high-order term coefficients that can be used for each of the aspherical mirror surfaces in example seven, wherein each of the aspherical mirror surface types can be defined by formula (1) given in example one above.

TABLE 14

Fig. 32 shows an axial chromatic aberration curve of the imaging lens of example seven, which indicates deviation of the convergence focus of light rays of different wavelengths after passing through the imaging lens. Fig. 33 shows astigmatism curves representing meridional field curvature and sagittal field curvature of the imaging lens of example seven. Fig. 34 shows distortion curves of the imaging lens of example seven, which indicate distortion magnitude values corresponding to different angles of view. Fig. 35 shows a chromatic aberration of magnification curve of the imaging lens of example seven, which represents a deviation of different image heights on the imaging surface after light passes through the imaging lens.

As can be seen from fig. 32 to 35, the imaging lens according to example seven can achieve good imaging quality.

Example eight

As shown in fig. 36 to 40, an imaging lens of example eight of the present application is described. Fig. 36 shows a schematic diagram of an imaging lens structure of example eight.

As shown in fig. 36, the imaging lens includes, in order from an object side to an image side: a stop STO, a first lens E1, a second lens E2, a stop STO, a third lens E3, a fourth lens E4, a fifth lens E5, a sixth lens E6, a filter E7, and an image plane S15.

In this example, the total effective focal length f of the camera lens is 4.62mm, the half Semi-FOV of the maximum field angle of the camera lens is 41.1 °, the total system length TTL of the camera lens is 5.39mm and the image height ImgH is 4.15 mm.

Table 15 shows a basic structural parameter table of the imaging lens of example eight, in which the units of the radius of curvature and the thickness/distance are millimeters (mm).

Watch 15

Table 16 shows the high-order term coefficients that can be used for each aspherical mirror surface in example eight, wherein each aspherical mirror surface type can be defined by formula (1) given in example one above.

Flour mark

A4

A6

A8

A10

A12

A14

A16

A18

A20

S1

1.8057E-01

-1.1664E-03

-2.6740E-03

-1.4519E-03

-5.3299E-04

-1.1714E-04

-2.6916E-05

1.5499E-05

-2.2096E-06

S2

-3.8312E-02

1.9339E-03

-1.9981E-03

8.7825E-05

-5.8576E-05

-3.9139E-05

-1.0104E-05

4.9994E-06

-3.1838E-06

S3

2.4640E-02

1.6254E-02

-7.6199E-04

1.1132E-03

-3.0180E-05

-1.4273E-05

-1.8366E-06

3.1577E-06

1.5259E-06

S4

5.6923E-02

1.3080E-02

9.2392E-04

9.0338E-04

2.5172E-04

6.0791E-05

3.4834E-05

5.1236E-06

9.0786E-06

S5

-1.4180E-01

-3.4943E-03

8.7710E-04

1.1951E-03

3.7295E-04

1.8649E-04

5.2787E-05

3.3024E-05

-2.1441E-06

S6

-2.2569E-01

1.0195E-02

6.8236E-03

3.5620E-03

6.0802E-04

2.2169E-04

7.6694E-06

3.2521E-05

6.1183E-06

S7

-3.6521E-01

7.6931E-02

-4.8115E-03

-2.7839E-03

-3.6300E-04

1.1470E-03

3.8089E-05

-1.5766E-04

7.8110E-06

S8

-4.6533E-01

1.1867E-01

-1.5929E-02

-2.9713E-03

3.0456E-04

1.1623E-03

6.5926E-05

-6.7161E-05

1.2790E-04

S9

-6.7646E-01

-7.8548E-02

4.9349E-02

1.7145E-02

5.8767E-03

-8.3218E-04

-1.2777E-03

-1.4600E-03

-2.2952E-04

S10

7.7137E-02

-1.8213E-01

6.0769E-02

-3.5399E-03

7.1985E-03

3.0497E-03

2.3226E-03

3.9024E-04

7.6401E-04

S11

7.6361E-01

2.2290E-01

-1.4637E-01

5.8379E-02

-1.5334E-02

-9.6274E-04

2.4771E-03

-1.4366E-03

4.0664E-04

S12

-1.6555E+00

3.1697E-01

-2.4349E-02

4.2412E-02

-2.4128E-02

-3.5696E-03

-1.8504E-03

3.2407E-04

-1.5367E-03

TABLE 16

Fig. 37 shows an on-axis chromatic aberration curve of the imaging lens of example eight, which indicates that light rays of different wavelengths are out of focus after passing through the imaging lens. Fig. 38 shows astigmatism curves representing meridional field curvature and sagittal field curvature of the imaging lens of example eight. Fig. 39 shows distortion curves of the imaging lens of example eight, which show distortion magnitude values corresponding to different angles of view. Fig. 40 shows a chromatic aberration of magnification curve of the imaging lens of example eight, which represents a deviation of different image heights on the imaging surface after light passes through the imaging lens.

As can be seen from fig. 37 to 40, the imaging lens according to example eight can achieve good imaging quality.

To sum up, examples one to eight satisfy the relationships shown in table 17, respectively.

Table 17 table 18 gives effective focal lengths f of the imaging lenses of example one to example eight, effective focal lengths f1 to f6 of the respective lenses, and the like.

Parameter/example	1	2	3	4	5	6	7	8
									f(mm)	4.74	4.65	4.67	4.64	4.70	4.32	4.58	4.62
f1(mm)	3.93	3.86	3.86	3.89	3.83	4.06	3.91	3.85
									f2(mm)	-9.37	-8.91	-8.77	-9.08	-8.58	-10.79	-9.20	-8.55
f3(mm)	106.23	96.32	96.19	92.03	86.71	67.12	75.18	73.41
									f4(mm)	166.58	262.17	306.43	1853.12	286.24	327.10	1572.31	160.69
f5(mm)	4.50	4.47	4.46	4.32	4.46	4.30	4.58	4.63
									f6(mm)	-2.82	-2.97	-2.99	-2.75	-2.87	-2.82	-2.87	-2.87
TTL(mm)	5.32	5.32	5.33	5.32	5.35	5.21	5.39	5.39
									ImgH(mm)	4.19	4.19	4.19	4.15	4.00	4.15	4.15	4.15
Semi-FOV(°)	41.1	41.3	41.4	41.1	40.8	42.9	41.3	41.1

Watch 18

The present application also provides an imaging device whose electron photosensitive element may be a photo-coupled device (CCD) or a complementary metal oxide semiconductor device (CMOS). The imaging apparatus may be a stand-alone imaging device such as a digital camera, or may be an imaging module integrated on a mobile electronic device such as a mobile phone. The imaging device is equipped with the above-described image pickup lens.

It is to be understood that the above-described embodiments are only a few, but not all, embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of exemplary embodiments according to the present application. As used herein, the singular is intended to include the plural unless the context clearly dictates otherwise, and it should be further understood that the terms "comprises" and/or "comprising," when used in this specification, specify the presence of features, steps, operations, devices, components, and/or combinations thereof.

It should be noted that the terms "first," "second," and the like in the description and claims of this application and in the drawings described above are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used is interchangeable under appropriate circumstances such that the embodiments of the application described herein are capable of operation in other sequences than those illustrated or described herein.

The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

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

a first lens having an optical power;

a second lens having an optical power;

a third lens having a positive optical power;

a fourth lens having a positive optical power;

a fifth lens having an optical power;

a sixth lens having a negative optical power;

the side surface of a shot object of the fourth lens is a convex surface; the object side surface of the fifth lens is a convex surface, and the image side surface of the fifth lens is a convex surface; the object side surface of the sixth lens is a concave surface, and the image side surface of the sixth lens is a concave surface; the on-axis distance TTL from the side surface of a shot object of the first lens to an imaging surface and the half ImgH of the diagonal length of an effective pixel area on the imaging surface satisfy the following condition: TTL/ImgH is less than 1.4.

2. The imaging lens according to claim 1, wherein a maximum field angle FOV of the imaging lens satisfies: FOV > 80.

3. The imaging lens according to claim 1, wherein an effective focal length f1 of the first lens and an effective focal length f2 of the second lens satisfy: -3.0 < f2/f1 < -2.0.

4. The imaging lens according to claim 1, wherein a radius of curvature R1 of an object side surface of the first lens and a radius of curvature R2 of an image side surface of the first lens satisfy: 1.5 < (R2+ R1)/(R2-R1) < 2.0.

5. The imaging lens according to claim 1, wherein a radius of curvature R3 of an object side surface of the second lens and a radius of curvature R4 of an image side surface of the second lens satisfy: 3.0 < R3/R4 < 13.5.

6. The imaging lens according to claim 1, wherein a radius of curvature R5 of an object side surface of the third lens and a radius of curvature R6 of an image side surface of the third lens satisfy: R6/R5 is more than 1.0 and less than or equal to 2.5.

7. The imaging lens according to claim 1, wherein a radius of curvature R5 of an object side surface of the third lens, a radius of curvature R10 of an image side surface of the fifth lens, and an effective focal length f5 of the fifth lens satisfy: f5/(R5+ R10) is more than 0 and less than 1.0.

8. The imaging lens according to claim 1, wherein a center thickness CT5 of the fifth lens on the optical axis and an edge thickness ET5 of the fifth lens satisfy: 1.5 < CT5/ET5 < 4.0.

9. The imaging lens according to claim 1, wherein a radius of curvature R8 of an image side surface of the fourth lens and an effective focal length f of the imaging lens satisfy: 2.5 < R8/f < 4.5.

10. The imaging lens according to claim 1, wherein a center thickness CT6 of the sixth lens on the optical axis and an edge thickness ET6 of the sixth lens satisfy: 0.5 < CT6/ET6 < 2.0.

11. The imaging lens according to claim 1, wherein an on-axis distance SAG61 between an intersection point of the object-side surface of the sixth lens and the optical axis to an effective radius vertex of the object-side surface of the sixth lens, an on-axis distance SAG62 between an intersection point of the image-side surface of the sixth lens and the optical axis to an effective radius vertex of the image-side surface of the sixth lens, and a center thickness CT6 of the sixth lens on the optical axis satisfy: -4.0 < (SAG61+ SAG62)/CT6 < -1.5.

12. The imaging lens according to claim 1, wherein an on-axis distance SAG52 between an intersection point of an image-side surface of the fifth lens and the optical axis and an effective radius vertex of the image-side surface of the fifth lens and a center thickness CT5 of the fifth lens on the optical axis satisfies: -1.5 < SAG52/CT5 < -1.0.

13. The imaging lens according to claim 1, wherein an abbe number V2 of the second lens and an abbe number V4 of the fourth lens satisfy: v2+ V4 < 40.

14. The imaging lens according to claim 1, wherein a center thickness CT5 of the fifth lens on the optical axis and an edge thickness ET5 of the fifth lens satisfy: 0 < ET5/CT5 < 1.0.

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

a first lens having an optical power;

a second lens having an optical power;

a third lens having a positive optical power;

a fourth lens having a positive optical power;

a fifth lens having an optical power;

a sixth lens having a negative optical power;

the side surface of a shot object of the fourth lens is a convex surface; the object side surface of the fifth lens is a convex surface, and the image side surface of the fifth lens is a convex surface; the object side surface of the sixth lens is a concave surface, and the image side surface of the sixth lens is a concave surface; the effective focal length f1 of the first lens and the effective focal length f2 of the second lens satisfy: -3.0 < f2/f1 < -2.0.

16. The imaging lens according to claim 15, wherein a maximum field angle FOV of the imaging lens satisfies: FOV > 80.

17. The imaging lens system according to claim 15, wherein an on-axis distance TTL from an object side surface of the first lens to an imaging surface and ImgH which is half the diagonal length of an effective pixel area on the imaging surface satisfy: TTL/ImgH is less than 1.4; the radius of curvature R1 of the object side surface of the first lens and the radius of curvature R2 of the image side surface of the first lens satisfy: 1.5 < (R2+ R1)/(R2-R1) < 2.0.

18. The imaging lens unit according to claim 15, wherein a radius of curvature R3 of an object side surface of the second lens and a radius of curvature R4 of an image side surface of the second lens satisfy: 3.0 < R3/R4 < 13.5.

19. The imaging lens system according to claim 15, wherein a radius of curvature R5 of an object side surface of the third lens and a radius of curvature R6 of an image side surface of the third lens satisfy: R6/R5 is more than 1.0 and less than or equal to 2.5.

20. The imaging lens unit according to claim 15, wherein a radius of curvature R5 of an object side surface of the third lens, a radius of curvature R10 of an image side surface of the fifth lens, and an effective focal length f5 of the fifth lens satisfy: f5/(R5+ R10) is more than 0 and less than 1.0.

21. The imaging lens according to claim 15, wherein a center thickness CT5 of the fifth lens on the optical axis and an edge thickness ET5 of the fifth lens satisfy: 1.5 < CT5/ET5 < 4.0.

22. An imaging lens according to claim 15, wherein a radius of curvature R8 of an image side surface of the fourth lens and an effective focal length f of the imaging lens satisfy: 2.5 < R8/f < 4.5.

23. The imaging lens according to claim 15, wherein a center thickness CT6 of the sixth lens on the optical axis and an edge thickness ET6 of the sixth lens satisfy: 0.5 < CT6/ET6 < 2.0.

24. The imaging lens system according to claim 15, wherein an axial distance SAG61 between an intersection of the object side surface of the sixth lens and the optical axis and an effective radius vertex of the object side surface of the sixth lens, an axial distance SAG62 between an intersection of the image side surface of the sixth lens and the optical axis and an effective radius vertex of the image side surface of the sixth lens, and a center thickness CT6 of the sixth lens on the optical axis satisfy: -4.0 < (SAG61+ SAG62)/CT6 < -1.5.

25. The imaging lens according to claim 15, wherein an on-axis distance SAG52 between an intersection point of the image-side surface of the fifth lens and the optical axis and an effective radius vertex of the image-side surface of the fifth lens and a center thickness CT5 of the fifth lens on the optical axis satisfies: -1.5 < SAG52/CT5 < -1.0.

26. The imaging lens according to claim 15, wherein an abbe number V2 of the second lens and an abbe number V4 of the fourth lens satisfy: v2+ V4 < 40.

27. The imaging lens according to claim 15, wherein a center thickness CT5 of the fifth lens on the optical axis and an edge thickness ET5 of the fifth lens satisfy: 0 < ET5/CT5 < 1.0.