CN217181312U

CN217181312U - Camera lens

Info

Publication number: CN217181312U
Application number: CN202220390494.9U
Authority: CN
Inventors: 高扬; 徐武超; 戴付建; 赵烈烽
Original assignee: Zhejiang Sunny Optics Co Ltd
Current assignee: Zhejiang Sunny Optics Co Ltd
Priority date: 2022-02-24
Filing date: 2022-02-24
Publication date: 2022-08-12
Anticipated expiration: 2032-02-24

Abstract

The utility model provides a camera lens. The camera lens comprises from an object side to an image side: a first lens element with refractive power; a second lens element with refractive power; a third lens element with negative refractive power; a fourth lens element with positive refractive power; a fifth lens element with refractive power; a sixth lens element with refractive power; a seventh lens element with positive refractive power; the surface of the first lens, which faces the object side, is a convex surface; the surface of the third lens facing the image side is a concave surface; the surface of the sixth lens, which faces the object side, is a concave surface; the surface of the seventh lens element facing the image side is a convex surface; the maximum half field angle Semi-FOV of the camera lens meets the following requirements: Semi-FOV > 80.0. The utility model provides a camera lens among the prior art have big angle of vision, large aperture, small-size and high pixel be difficult to the problem of compromise simultaneously.

Description

Camera lens

Technical Field

The utility model relates to an optical imaging equipment technical field particularly, relates to a camera lens.

Background

With the continuous development of the optical imaging field and the imaging chip technology, the limited field of view of the optical system of the conventional camera lens cannot meet the requirements of many applications. An optical system with a large field angle and a large field of view is gradually favored, and is gradually becoming the direction and focus of major research in the current visual field. The fish-eye lens is an ultra-wide-angle lens based on bionics, and carries out compression deformation on a physical space by introducing barrel distortion, so that an ultra-large field angle is obtained. Certainly, the ultra-wide-angle camera lens generally needs to have higher pixels to meet the pursuit of users on the imaging quality; the development trend and research direction of the future camera lens are to ensure that the overall size of the camera lens is small while the camera lens has high pixels so as to be applied to various portable electronic products.

That is, the imaging lens in the related art has a problem that it is difficult to simultaneously achieve a large angle of view, a large aperture, a small size, and a high pixel.

SUMMERY OF THE UTILITY MODEL

A primary object of the present invention is to provide a camera lens to solve the problem that camera lens in the prior art has a large field angle, a large aperture, a small size and a high pixel which are difficult to be simultaneously taken into account.

In order to achieve the above object, according to an aspect of the present invention, there is provided an imaging lens including, in order from an object side to an image side: a first lens element with refractive power; a second lens element with refractive power; a third lens element with negative refractive power; a fourth lens element with positive refractive power; a fifth lens element with refractive power; a sixth lens element with refractive power; a seventh lens element with positive refractive power; the surface of the first lens, which faces the object side, is a convex surface; the surface of the third lens facing the image side is a concave surface; the surface of the sixth lens, which faces the object side, is a concave surface; the surface of the seventh lens element facing the image side is a convex surface; the maximum half field angle Semi-FOV of the camera lens meets the following requirements: Semi-FOV > 80.0.

Further, an effective focal length f7 of the seventh lens and an effective focal length f of the imaging lens satisfy: f/f7< 0.8.

Further, the effective focal length f of the camera lens and the entrance pupil diameter EPD of the camera lens satisfy: f/EPD < 2.8.

Further, the distance between the half ImgH of the diagonal length of the effective pixel area on the imaging plane and the distance BFL from the surface of the seventh lens facing the image side to the imaging plane on the optical axis satisfy: 0.2< ImgH/BFL < 1.4.

Further, the effective focal length f of the imaging lens and the effective focal length f2 of the second lens satisfy: -0.6< f/f2< 0.

Further, an effective focal length f3 of the third lens and an effective focal length f5 of the fifth lens satisfy: -1.5< f3/f5< -0.5.

Further, the effective focal length f of the imaging lens and the combined focal length f23 of the second lens and the third lens satisfy: -1.2< f/f23< -0.4.

Further, a radius of curvature R6 of a surface of the third lens facing the image side and a radius of curvature R7 of a surface of the fourth lens facing the object side satisfy: 0.2< R6/R7< 1.4.

Further, a curvature radius R11 of a surface of the sixth lens facing the object side and a curvature radius R12 of a surface of the sixth lens facing the image side satisfy: (R11+ R12)/(R11-R12) < 1.0.

Further, a center thickness CT4 of the fourth lens on the optical axis and an air interval T23 of the second lens and the third lens on the optical axis satisfy: 0.5< CT4/T23< 1.5.

Further, the central thickness CT5 of the fifth lens on the optical axis, the central thickness CT6 of the sixth lens on the optical axis, and the central thickness CT7 of the seventh lens on the optical axis satisfy: 0.6< (CT5+ CT6)/CT7< 1.6.

Further, an on-axis distance SL from the aperture to the imaging plane and an on-axis distance TTL from a surface of the first lens facing the object side to the imaging plane satisfy: SL/TTL < 0.8.

Further, an effective semi-aperture DT61 of a surface of the sixth lens facing the object side and an effective semi-aperture DT71 of a surface of the seventh lens facing the object side satisfy: 0.2< DT61/DT71< 1.0.

Further, an effective half aperture DT41 of a surface of the fourth lens facing the object side and an effective half aperture DT42 of a surface of the fourth lens facing the image side satisfy: (DT41-DT42)/DT42< 0.8.

Further, an on-axis distance SAG21 between an intersection point of the surface of the second lens facing the object side and the optical axis to an effective radius vertex of the surface of the second lens facing the object side and an on-axis distance SAG11 between an intersection point of the surface of the first lens facing the object side and the optical axis to an effective radius vertex of the surface of the first lens facing the object side satisfy: 0.2< SAG21/SAG11< 1.2.

Further, the edge thickness ET2 of the second lens and the edge thickness ET1 of the first lens satisfy: 0.3< ET2/ET1< 1.5.

Further, the abbe number V4 of the fourth lens and the abbe number V1 of the first lens satisfy: 0.3< V4/(V1-V4) < 0.9.

According to another aspect of the present invention, there is provided an image pickup lens, comprising, in order from an object side to an image side: a first lens element with refractive power; a second lens element with refractive power; a third lens element with negative refractive power; a fourth lens element with positive refractive power; a fifth lens element with refractive power; a sixth lens element with refractive power; a seventh lens element with positive refractive power; the surface of the first lens, which faces the object side, is a convex surface; the surface of the third lens facing the image side is a concave surface; the surface of the sixth lens, which faces the object side, is a concave surface; the surface of the seventh lens element facing the image side is a convex surface; the effective focal length f of the image pickup lens and the effective focal length f7 of the seventh lens satisfy: f/f7< 0.8.

Further, the maximum half field angle Semi-FOV of the imaging lens satisfies: Semi-FOV > 80.0; the effective focal length f of the camera lens and the entrance pupil diameter EPD of the camera lens meet the following requirements: f/EPD < 2.8.

Further, the effective focal length f3 of the third lens and the effective focal length f5 of the fifth lens satisfy: -1.5< f3/f5< -0.5.

Further, a curvature radius R6 of a surface of the third lens facing the image side and a curvature radius R7 of a surface of the fourth lens facing the object side satisfy: 0.2< R6/R7< 1.4.

With the technical solution of the present invention, the image capturing lens includes, in order from an object side to an image side, a first lens element with refractive power, a second lens element with refractive power, a third lens element with negative refractive power, a fourth lens element with positive refractive power, a fifth lens element with refractive power, a sixth lens element with refractive power, and a seventh lens element with positive refractive power; the surface of the first lens, which faces the object side, is a convex surface; the surface of the third lens facing the image side is a concave surface; the surface of the sixth lens, which faces the object side, is a concave surface; the surface of the seventh lens element facing the image side is a convex surface; the maximum half field angle Semi-FOV of the camera lens meets the following requirements: Semi-FOV > 80.0.

Through reasonable configuration of refractive power and surface type of each lens and optimization of optical parameters, the camera lens has the requirements of large field angle and small size, meets the characteristics of a fisheye lens, and can meet the requirements of users. The maximum half-field angle Semi-FOV of the camera lens is controlled to be more than 80 degrees, so that the characteristic of large field angle is favorably ensured. In addition, the camera lens has the characteristics of large aperture and high pixel, and ensures that the final imaging can have better definition.

Drawings

The accompanying drawings, which form a part of the present application, are included to provide a further understanding of the invention, and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the invention and not to limit the invention. 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 and 3 show an axial chromatic aberration curve and an astigmatism curve of the imaging lens in fig. 1, respectively;

fig. 4 is a schematic structural view of an imaging lens according to a second example of the present invention;

fig. 5 and 6 show an axial chromatic aberration curve and an astigmatism curve of the imaging lens in fig. 4, respectively;

fig. 7 is a schematic structural diagram of an imaging lens according to a third example of the present invention;

fig. 8 and 9 show an axial chromatic aberration curve and an astigmatism curve of the imaging lens in fig. 7, respectively;

fig. 10 is a schematic view showing a configuration of an imaging lens according to a fourth example of the present invention;

fig. 11 and 12 show an axial chromatic aberration curve and an astigmatism curve of the imaging lens in fig. 10, respectively;

fig. 13 is a schematic structural view of an imaging lens according to a fifth example of the present invention;

fig. 14 and 15 show an axial chromatic aberration curve and an astigmatism curve of the imaging lens in fig. 13, respectively;

fig. 16 is a schematic structural view of an imaging lens according to a sixth example of the present invention;

fig. 17 and 18 show an axial chromatic aberration curve and an astigmatism curve of the imaging lens in fig. 16, respectively;

fig. 19 is a schematic view showing a configuration of an imaging lens according to a seventh example of the present invention;

fig. 20 and 21 show an axial chromatic aberration curve and an astigmatism curve of the imaging lens in fig. 19, respectively.

Wherein the figures include the following reference numerals:

STO, stop; e1, first lens; s1, the object-side surface of the first lens element; s2, the surface of the first lens element facing the image side; e2, second lens; s3, the object-side surface of the second lens element; s4, the surface of the second lens element facing the image side; e3, third lens; s5, the object-side surface of the third lens element; s6, the surface of the third lens element facing the image side; e4, fourth lens; s7, the object-side surface of the fourth lens element; s8, the surface of the fourth lens element facing the image side; e5, fifth lens; s9, the object-side surface of the fifth lens element; s10, the surface of the fifth lens element facing the image side; e6, sixth lens; s11, the object-side surface of the sixth lens element; s12, the surface of the sixth lens element facing the image side; e7, seventh lens; s13, the object-side surface of the seventh lens element; s14, the surface of the seventh lens element facing the image side; e8, optical filters; s15, the surface of the filter facing the object side; s16, the surface of the filter facing the image side; and S17, 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 accompanying drawings in conjunction with embodiments.

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 application, where the contrary is not intended, the use of directional terms such as "upper, lower, top, bottom" generally refer to the orientation as shown in the drawings, or to the component itself being oriented in a vertical, perpendicular, or gravitational direction; 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 invention.

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

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

Herein, the paraxial region refers to a region near the optical axis. If the lens surface is convex and the convex position is not defined, it means that the lens surface is convex at least in the paraxial region; if the lens surface is concave and the concave position is not defined, it means that the lens surface is concave at least in the paraxial region. The surface of each lens close to the object side becomes the surface of the lens facing the object side, and the surface of each lens close to the image side is called the surface of the lens facing the image side. 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. With respect to the surface facing the object side, a convex surface is determined when the R value is positive, and a concave surface is determined when the R value is negative; on the surface facing the image side, the image is determined to be concave when the R value is positive, and convex when the R value is negative.

There is big angle of view, large aperture, small-size and the problem that high pixel is difficult to compromise simultaneously in order to solve camera lens among the prior art, the utility model provides a camera lens.

Example one

As shown in fig. 1 to 21, the imaging lens assembly includes, in order from an object side to an image side, a first lens element with refractive power, a second lens element with refractive power, a third lens element with negative refractive power, a fourth lens element with positive refractive power, a fifth lens element with refractive power, a sixth lens element with refractive power and a seventh lens element with positive refractive power; the surface of the first lens, which faces the object side, is a convex surface; the surface of the third lens facing the image side is a concave surface; the surface of the sixth lens, which faces the object side, is a concave surface; the surface of the seventh lens element facing the image side is a convex surface; the maximum half field angle Semi-FOV of the camera lens meets the following requirements: Semi-FOV > 80.0.

In the present embodiment, the effective focal length f of the imaging lens and the effective focal length f7 of the seventh lens satisfy: f/f7< 0.8. By controlling the ratio of the effective focal length f of the optical imaging lens to the effective focal length f7 of the seventh lens element within a reasonable range, the refractive power of the seventh lens element is reasonably distributed in space, the aberration of the imaging lens is reduced, and the imaging quality is effectively improved. Preferably, f/f7< 0.6.

In this embodiment, the effective focal length f of the imaging lens and the entrance pupil diameter EPD of the imaging lens satisfy: f/EPD < 2.8. The ratio of the effective focal length f of the camera lens to the entrance pupil diameter EPD of the camera lens is controlled within a reasonable range, so that the camera lens can be effectively ensured to have the characteristics of large aperture and large light flux. Preferably, f/EPD < 2.5.

In this embodiment, the distance BFL between the image-side-facing surface of the seventh lens element and the imaging plane satisfies a relationship between ImgH, which is half the diagonal length of the effective pixel region on the imaging plane, and BFL, which is the distance between the image-side-facing surface of the seventh lens element and the imaging plane: 0.2< ImgH/BFL < 1.4. By controlling the ratio of the half of the diagonal length ImgH of the effective pixel area on the imaging surface to the distance BFL on the optical axis from the surface of the seventh lens facing the image side to the imaging surface within a reasonable range, the reasonable distribution of the structural size of the camera lens on the space can be ensured. Preferably, 0.5< ImgH/BFL < 1.1.

In the present embodiment, the effective focal length f of the imaging lens and the effective focal length f2 of the second lens satisfy: -0.6< f/f2< 0. The condition is satisfied, the spatial reasonable distribution of the refractive power of the second lens is facilitated, the aberration of the camera lens is reduced, and the imaging quality of the camera lens is effectively improved. Preferably, -0.4< f/f2< -0.2.

In the present embodiment, the effective focal length f3 of the third lens and the effective focal length f5 of the fifth lens satisfy: -1.5< f3/f5< -0.5. The optical lens meets the conditional expression, the refractive power of the third lens and the refractive power of the fifth lens are reasonably distributed in space, the aberration of the camera lens is reduced, and the imaging quality of the camera lens is effectively improved. Preferably, -1.3< f3/f5< -0.7.

In the present embodiment, the effective focal length f of the imaging lens and the combined focal length f23 of the second lens and the third lens satisfy: -1.2< f/f23< -0.4. The optical lens meets the conditional expression, the spatial reasonable distribution of the refractive power of the second lens and the refractive power of the third lens are facilitated, the aberration is reduced, and the imaging quality of the photographic lens is effectively improved. Preferably, -0.9< f/f23< -0.6.

In this embodiment, a radius of curvature R6 of a surface of the third lens facing the image side and a radius of curvature R7 of a surface of the fourth lens facing the object side satisfy: 0.2< R6/R7< 1.4. Satisfy this conditional expression, can effectively retrain the shape of third lens and fourth lens, and then effectual promotion camera lens's image quality. Preferably 0.5< R6/R7< 1.1.

In this embodiment, a radius of curvature R11 of a surface of the sixth lens facing the object side and a radius of curvature R12 of a surface of the sixth lens facing the image side satisfy: (R11+ R12)/(R11-R12) < 1.0. The conditional expression is satisfied, the shape of the sixth lens can be effectively constrained, and the imaging quality of the camera lens is effectively improved. Preferably, (R11+ R12)/(R11-R12) < 0.7.

In the present embodiment, the center thickness CT4 of the fourth lens on the optical axis and the air interval T23 of the second lens and the third lens on the optical axis satisfy: 0.5< CT4/T23< 1.5. When the condition is satisfied, the curvature of field generated by the rear lens of the camera lens and the curvature of field generated by the front lens can be balanced, so that the system has reasonable curvature of field. Preferably 0.7< CT4/T23< 1.2.

In the present embodiment, the center thickness CT5 of the fifth lens on the optical axis, the center thickness CT6 of the sixth lens on the optical axis, and the center thickness CT7 of the seventh lens on the optical axis satisfy: 0.6< (CT5+ CT6)/CT7< 1.6. Satisfying the conditional expression is beneficial to reasonably controlling the central thickness of the three lenses, thereby controlling the distortion contribution amount within a reasonable range. Preferably, 0.8< (CT5+ CT6)/CT7< 1.4.

In the present embodiment, an on-axis distance SL from the aperture stop to the imaging plane and an on-axis distance TTL from the object-side surface of the first lens to the imaging plane satisfy: SL/TTL < 0.8. Satisfying this conditional expression, can making camera lens's structural dimension more reasonable, be favorable to the miniaturization. Preferably, SL/TTL < 0.5.

In this embodiment, an effective half aperture DT61 of a surface of the sixth lens facing the object side and an effective half aperture DT71 of a surface of the seventh lens facing the object side satisfy: 0.2< DT61/DT71< 1.0. Satisfying the conditional expression is beneficial to controlling the heights of the sixth lens and the seventh lens, thereby obtaining better mechanical structure strength. Preferably 0.5< DT61/DT71< 0.8.

In this embodiment, an effective half aperture DT41 of a surface of the fourth lens facing the object side and an effective half aperture DT42 of a surface of the fourth lens facing the image side satisfy: (DT41-DT42)/DT42< 0.8. Satisfying this conditional expression is favorable to controlling the height of fourth lens to obtain better mechanical structure intensity. Preferably, (DT41-DT42)/DT42< 0.5.

In this embodiment, an on-axis distance SAG21 between an intersection point of a surface of the second lens facing the object side and the optical axis to an effective radius vertex of the surface of the second lens facing the object side and an on-axis distance SAG11 between an intersection point of a surface of the first lens facing the object side and the optical axis to an effective radius vertex of the surface of the first lens facing the object side satisfy: 0.2< SAG21/SAG11< 1.2. The condition is satisfied, so that the camera lens has reasonable curvature of field. Preferably, 0.4< SAG21/SAG11< 1.0.

In the present embodiment, the edge thickness ET2 of the second lens and the edge thickness ET1 of the first lens satisfy: 0.3< ET2/ET1< 1.5. Satisfy this conditional expression, be favorable to guaranteeing the structural strength of first lens and second lens, promote two lens processing nature. Preferably 0.6< ET2/ET1< 1.3.

In the present embodiment, the abbe number V4 of the fourth lens and the abbe number V1 of the first lens satisfy: 0.3< V4/(V1-V4) < 0.9. The condition is satisfied, the vertical axis chromatic aberration of the camera lens is corrected, and better imaging performance is obtained. Preferably, 0.6< V4/(V1-V4) < 0.7.

Example two

As shown in fig. 1 to 21, the imaging lens includes, in order from an object side to an image side: a first lens element with refractive power; a second lens element with refractive power; a third lens element with negative refractive power; a fourth lens element with positive refractive power; a fifth lens element with refractive power; a sixth lens element with refractive power; a seventh lens element with positive refractive power; the surface of the first lens, which faces the object side, is a convex surface; the surface of the third lens facing the image side is a concave surface; the surface of the sixth lens, which faces the object side, is a concave surface; the surface of the seventh lens element facing the image side is a convex surface; the effective focal length f of the image pickup lens and the effective focal length f7 of the seventh lens satisfy: f/f7< 0.8.

Preferably, f/f7< 0.6.

Through reasonable configuration of refractive power and surface type of each lens and optimization of optical parameters, the camera lens has the requirements of large field angle and small size, meets the characteristics of a fisheye lens, and can meet the requirements of users. By controlling the ratio of the effective focal length f of the optical imaging lens to the effective focal length f7 of the seventh lens element within a reasonable range, the refractive power of the seventh lens element is reasonably distributed in space, the aberration of the camera lens is reduced, and the imaging quality is effectively improved. In addition, the camera lens has the characteristics of large aperture and high pixel, and ensures that the final imaging can have better definition.

In the present embodiment, the maximum half field angle Semi-FOV of the imaging lens satisfies: Semi-FOV > 80.0. The maximum half-field angle Semi-FOV of the camera lens is controlled to be more than 80 degrees, so that the characteristic of large field angle is favorably ensured.

In the present embodiment, the effective focal length f of the imaging lens and the entrance pupil diameter EPD of the imaging lens satisfy: f/EPD < 2.8. The ratio of the effective focal length f of the camera lens to the entrance pupil diameter EPD of the camera lens is controlled within a reasonable range, so that the camera lens can be effectively ensured to have the characteristics of large aperture and large light flux. Preferably, f/EPD < 2.5.

In the present embodiment, the effective focal length f of the imaging lens and the combined focal length f23 of the second lens and the third lens satisfy: -1.2< f/f23< -0.4. The condition is satisfied, the reasonable distribution of the refractive power of the second lens and the third lens in space is facilitated, the aberration is reduced, and the imaging quality of the camera lens is effectively improved. Preferably, -0.9< f/f23< -0.6.

In this embodiment, an effective semi-aperture DT61 of a surface of the sixth lens facing the object side and an effective semi-aperture DT71 of a surface of the seventh lens facing the object side satisfy: 0.2< DT61/DT71< 1.0. Satisfying the conditional expression is beneficial to controlling the heights of the sixth lens and the seventh lens, thereby obtaining better mechanical structure strength. Preferably 0.5< DT61/DT71< 0.8.

In this embodiment, an on-axis distance SAG21 between an intersection point of an object-side-facing surface of the second lens and the optical axis and an effective radius vertex of the object-side-facing surface of the second lens and an on-axis distance SAG11 between an intersection point of an object-side-facing surface of the first lens and the optical axis and an effective radius vertex of the object-side-facing surface of the first lens satisfy: 0.2< SAG21/SAG11< 1.2. The condition is satisfied, so that the camera lens has reasonable curvature of field. Preferably 0.4< SAG21/SAG11< 1.0.

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 seven lenses described above. By reasonably distributing the refractive power, the surface shape, the central thickness of each lens, the axial distance between each lens and the like, the aperture of the camera lens can be effectively increased, the sensitivity of the camera lens can be reduced, and the machinability of the camera lens can be improved, so that the camera lens is more beneficial to production and processing and can be suitable for portable electronic equipment such as smart phones. The imaging lens also has a large aperture and a large field angle. The advantages of ultra-thin and good imaging quality can meet the miniaturization requirement of intelligent electronic products.

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 seven lenses are exemplified in the embodiment, the imaging lens is not limited to including seven 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 seven is applicable to all embodiments of the present application.

Example one

As shown in fig. 1 to 3, 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 first lens E1, a second lens E2, a third lens E3, a fourth lens E4, a stop STO, a fifth lens E5, a sixth lens E6, a seventh lens E7, a filter E8, and an image plane S17.

The first lens element E1 with negative refractive power has a convex object-side surface S1 and a concave image-side surface S2. The second lens element E2 with negative refractive power has a convex object-side surface S3 and a concave image-side surface S4. The third lens element E3 with negative refractive power has a concave object-side surface S5 and a concave image-side surface S6. The fourth lens element E4 with positive refractive power has a convex object-side surface S7 and a convex image-side surface S8. The fifth lens element E5 with positive refractive power has a convex object-side surface S9 and a convex image-side surface S10. 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 seventh lens element E7 with positive refractive power has a convex object-side surface S13 and a convex image-side surface S14. The filter E8 has a surface S15 facing the object side of the filter and a surface S16 facing the image side of the filter. The light from the object passes through the respective surfaces S1 to S16 in order and is finally imaged on the imaging surface S17.

In this example, the total effective focal length f of the imaging lens is 1.12mm, the maximum half field angle Semi-FOV of the imaging lens is 89.8 °, the total length TTL of the imaging lens is 12.00mm, and the image height ImgH is 2.74 mm.

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

TABLE 1

In example one, a surface of any one of the second lens element E2, the third lens element E3, the fifth lens element E5, the sixth lens element E6, and the seventh lens element E7, which faces towards the object side, and a surface of which faces towards the image side are aspheric, and the surface type of each aspheric lens can be defined by, but is not limited to, the following aspheric formula:

wherein x is the rise of the distance from the aspheric surface vertex to the aspheric surface vertex when the aspheric surface is at the position with the height of h along the optical axis direction; c is the paraxial curvature of the aspheric surface, c being 1/R (i.e., paraxial curvature c is the inverse of radius of curvature R in table 1 above); k is a conic coefficient; ai is the correction coefficient of the i-th order of the aspherical surface. Table 2 below gives the high-order coefficient coefficients a4, a6, A8, a10, a12, a14, a16, a18, a20, a22, a24, a26, a28, and a30 that can be used for each of the aspherical mirrors in example one.

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.

As can be seen from fig. 2 and 3, the imaging lens according to the first example can achieve good imaging quality.

Example two

As shown in fig. 4 to 6, 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. 4 shows a schematic diagram of the imaging lens structure of example two.

As shown in fig. 4, the imaging lens includes, in order from an object side to an image side: a first lens E1, a second lens E2, a third lens E3, a fourth lens E4, a stop STO, a fifth lens E5, a sixth lens E6, a seventh lens E7, a filter E8, and an image plane S17.

The first lens element E1 with negative refractive power has a convex object-side surface S1 and a concave image-side surface S2. The second lens element E2 with negative refractive power has a convex object-side surface S3 and a concave image-side surface S4. The third lens element E3 with negative refractive power has a concave object-side surface S5 and a concave image-side surface S6. The fourth lens element E4 with positive refractive power has a convex object-side surface S7 and a convex image-side surface S8. The fifth lens element E5 with positive refractive power has a convex object-side surface S9 and a convex image-side surface S10. The sixth lens element E6 with negative refractive power has a concave object-side surface S11 and a concave image-side surface S12. The seventh lens element E7 with positive refractive power has a convex object-side surface S13 and a convex image-side surface S14. The filter E8 has a surface S15 facing the object side of the filter and a surface S16 facing the image side of the filter. The light from the object passes through the respective surfaces S1 to S16 in order and is finally imaged on the imaging surface S17.

In this example, the total effective focal length f of the imaging lens is 1.00mm, the maximum half field angle Semi-FOV of the imaging lens is 89.8 °, the total length TTL of the imaging lens is 12.00mm, and the image height ImgH is 2.74 mm.

Table 3 shows a basic configuration parameter table of the imaging lens of example two, in which the units of the radius of curvature, the thickness/distance, and the radius of curvature are all 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.

Flour mark

A4

A6

A8

A10

A12

A14

A16

S3

1.6750E-01

-9.6183E-02

2.9177E-02

-5.4857E-03

6.5864E-04

-4.9144E-05

2.0824E-06

S4

4.3078E-02

6.8322E-01

-1.7270E+00

2.3764E+00

-2.2204E+00

1.4661E+00

-6.8635E-01

S5

-7.2251E-02

1.0291E-01

-9.0963E-02

5.3973E-02

-2.1312E-02

5.4705E-03

-8.7401E-04

S6

-3.8534E-02

1.3263E-01

-8.0098E-02

-5.2862E-02

1.6713E-01

-1.5849E-01

7.9056E-02

S9

6.6362E-02

-7.0253E-01

5.6361E+00

-2.9050E+01

9.6632E+01

-2.0776E+02

2.7747E+02

S10

-3.6451E-01

9.6068E-01

-2.2155E+00

3.5096E+00

-4.0098E+00

3.0072E+00

-1.2422E+00

S11

-5.4026E-01

1.1813E+00

-2.5105E+00

4.2001E+00

-5.6928E+00

5.4212E+00

-3.1002E+00

S12

-4.9055E-01

7.3668E-01

-7.9512E-01

6.1946E-01

-3.7750E-01

1.8709E-01

-6.9908E-02

S13

-3.9189E-01

6.4952E-01

-9.3268E-01

9.9011E-01

-7.1275E-01

3.3000E-01

-9.3452E-02

S14

3.6649E-02

-1.7968E-02

7.0630E-03

8.6403E-04

-2.1782E-03

1.7406E-03

-7.6603E-04

Flour mark

A18

A20

A22

A24

A26

A28

A30

S3

-3.8689E-08

2.5269E-11

0.0000E+00

S4

2.2512E-01

-5.0078E-02

6.9614E-03

-4.5473E-04

-1.6154E-05

4.7834E-06

-2.3541E-07

S5

7.8846E-05

-3.0655E-06

0.0000E+00

S6

-2.1353E-02

2.5695E-03

0.0000E+00

S9

-2.0890E+02

6.7512E+01

0.0000E+00

S10

9.0328E-02

1.3564E-01

-5.2402E-02

0.0000E+00

S11

8.1790E-01

1.3218E-02

-3.5065E-02

0.0000E+00

S12

1.6447E-02

-1.7409E-03

0.0000E+00

S13

1.4684E-02

-9.7984E-04

0.0000E+00

S14

1.8652E-04

-2.4548E-05

1.4258E-06

0.0000E+00

TABLE 4

Fig. 5 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. 6 shows astigmatism curves representing meridional field curvature and sagittal field curvature of the imaging lens of example two.

As can be seen from fig. 5 and 6, the imaging lens according to example two can achieve good imaging quality.

Example III

As shown in fig. 7 to 9, an imaging lens of example three 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. 7 shows a schematic diagram of an imaging lens structure of example three.

As shown in fig. 7, the imaging lens includes, in order from an object side to an image side: a first lens E1, a second lens E2, a third lens E3, a fourth lens E4, a stop STO, a fifth lens E5, a sixth lens E6, a seventh lens E7, a filter E8, and an image plane S17.

In this example, the total effective focal length f of the imaging lens is 0.90mm, the maximum half field angle Semi-FOV of the imaging lens is 89.8 °, the total length TTL of the imaging lens is 12.64mm, and the image height ImgH is 2.72 mm.

Table 5 shows a basic structural parameter table of the imaging lens of example three, in which the units of the radius of curvature, the thickness/distance, and the radius of curvature are all 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

S3

1.9749E-01

-1.0816E-01

3.3230E-02

-6.5256E-03

8.4592E-04

-7.1971E-05

3.8647E-06

S4

-3.5934E-02

9.8784E-01

-2.2292E+00

2.8229E+00

-2.4403E+00

1.5098E+00

-6.7308E-01

S5

-1.1627E-01

1.7792E-01

-1.4948E-01

7.8679E-02

-2.6887E-02

5.9506E-03

-8.2223E-04

S6

-7.4597E-02

2.8086E-01

-4.7417E-01

6.9765E-01

-7.7380E-01

5.4957E-01

-2.0219E-01

S9

2.3328E-01

-3.9790E+00

3.8486E+01

-2.2297E+02

8.0388E+02

-1.8171E+03

2.4982E+03

S10

-5.2238E-01

2.0844E+00

-6.1342E+00

1.1328E+01

-1.3643E+01

1.0868E+01

-5.7962E+00

S11

-7.8310E-01

2.7524E+00

-7.7412E+00

1.4927E+01

-2.0724E+01

2.0424E+01

-1.3081E+01

S12

-5.0718E-01

9.8207E-01

-1.4950E+00

1.6363E+00

-1.2549E+00

6.5416E-01

-2.1987E-01

S13

-2.7691E-01

3.1157E-01

-2.6757E-01

1.6333E-01

-6.9461E-02

1.9230E-02

-2.9658E-03

S14

5.5405E-02

-3.0207E-02

3.0991E-03

1.5110E-02

-1.6006E-02

9.9668E-03

-3.9265E-03

Flour mark

A18

A20

A22

A24

A26

A28

A30

S3

-1.1873E-07

1.5902E-09

0.0000E+00

S4

2.1413E-01

-4.7403E-02

6.9229E-03

-5.8558E-04

1.6061E-05

1.3901E-06

-9.5298E-08

S5

6.4447E-05

-2.1879E-06

0.0000E+00

S6

3.1028E-03

3.0223E-02

-1.3705E-02

3.1374E-03

-3.4887E-04

0.0000E+00

S9

-1.9061E+03

6.1781E+02

0.0000E+00

S10

1.9761E+00

-3.3980E-01

0.0000E+00

S11

4.2871E+00

-6.3890E-02

-2.5229E-01

0.0000E+00

S12

4.2848E-02

-3.6670E-03

0.0000E+00

S13

9.9420E-05

3.8366E-05

-4.3069E-06

0.0000E+00

S14

9.4017E-04

-1.2560E-04

7.2643E-06

0.0000E+00

TABLE 6

Fig. 8 shows an on-axis 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. 9 shows astigmatism curves representing meridional field curvature and sagittal field curvature of the imaging lens of example three.

As can be seen from fig. 8 and 9, the imaging lens according to the third example can achieve good imaging quality.

Example four

As shown in fig. 10 to 12, an imaging lens of the present example four 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. 10 shows a schematic diagram of an imaging lens structure of example four.

As shown in fig. 10, the imaging lens includes, in order from an object side to an image side: a first lens E1, a second lens E2, a third lens E3, a fourth lens E4, a stop STO, a fifth lens E5, a sixth lens E6, a seventh lens E7, a filter E8, and an image plane S17.

In this example, the total effective focal length f of the imaging lens is 1.15mm, the maximum half field angle Semi-FOV of the imaging lens is 89.8 °, the total length TTL of the imaging lens is 12.17mm, and the image height ImgH is 2.74 mm.

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

TABLE 7

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

TABLE 8

Fig. 11 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. 12 shows astigmatism curves representing meridional field curvature and sagittal field curvature of the imaging lens of example four.

As can be seen from fig. 11 and 12, the imaging lens according to example four can achieve good imaging quality.

Example five

As shown in fig. 13 to 15, an imaging lens of example five 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. 13 shows a schematic diagram of an imaging lens structure of example five.

As shown in fig. 13, the imaging lens includes, in order from an object side to an image side: a first lens E1, a second lens E2, a third lens E3, a fourth lens E4, a stop STO, a fifth lens E5, a sixth lens E6, a seventh lens E7, a filter E8, and an image plane S17.

In this example, the total effective focal length f of the imaging lens is 1.01mm, the maximum half field angle Semi-FOV of the imaging lens is 89.8 °, the total length TTL of the imaging lens is 12.32mm, and the image height ImgH is 2.35 mm.

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

TABLE 9

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

FIG. 10 shows a schematic view of a

Fig. 14 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. 15 shows astigmatism curves representing meridional field curvature and sagittal field curvature of the imaging lens of example five.

As can be seen from fig. 14 and 15, the imaging lens according to example five can achieve good imaging quality.

Example six

As shown in fig. 16 to 18, an imaging lens of example six 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. 16 shows a schematic diagram of an imaging lens structure of example six.

As shown in fig. 16, the imaging lens includes, in order from an object side to an image side: a first lens E1, a second lens E2, a third lens E3, a fourth lens E4, a stop STO, a fifth lens E5, a sixth lens E6, a seventh lens E7, a filter E8, and an image plane S17.

In this example, the total effective focal length f of the imaging lens is 0.99mm, the maximum half field angle Semi-FOV of the imaging lens is 89.8 °, the total length TTL of the imaging lens is 12.32mm, and the image height ImgH is 2.35 mm.

Table 11 shows a basic configuration parameter table of the imaging lens of example six, in which the units of the radius of curvature, the thickness/distance, and the radius of curvature are all 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.

TABLE 12

Fig. 17 shows an on-axis chromatic aberration curve of the imaging lens of example six, 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 six.

As can be seen from fig. 17 and 18, the imaging lens according to example six can achieve good imaging quality.

Example seven

As shown in fig. 19 to 21, an imaging lens of a seventh example 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. 19 shows a schematic diagram of an imaging lens structure of example seven.

As shown in fig. 19, the imaging lens includes, in order from an object side to an image side: a first lens E1, a second lens E2, a third lens E3, a fourth lens E4, a stop STO, a fifth lens E5, a sixth lens E6, a seventh lens E7, a filter E8, and an image plane S17.

In this example, the total effective focal length f of the imaging lens is 0.79mm, the maximum half field angle Semi-FOV of the imaging lens is 89.8 °, the total length TTL of the imaging lens is 13.95mm, and the image height ImgH is 1.41 mm.

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

Watch 13

Table 14 shows the high-order term coefficients that can be used for each aspherical mirror surface in example seven, 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

S3

1.3081E-01

-8.4631E-02

2.6513E-02

-5.1135E-03

6.4523E-04

-5.3309E-05

2.7558E-06

S4

1.9230E-01

-7.1036E-02

1.8096E-01

-7.1713E-01

1.2649E+00

-1.3638E+00

1.0033E+00

S5

4.5774E-02

-4.4248E-02

3.0875E-02

-1.4008E-02

4.1736E-03

-8.0246E-04

9.4703E-05

S6

5.2941E-02

-2.8902E-02

5.9954E-02

-9.8319E-02

1.2828E-01

-1.0943E-01

5.5221E-02

S9

1.8464E-03

-1.0960E-01

1.1258E+00

-6.3074E+00

2.0131E+01

-3.7480E+01

3.7956E+01

S10

-6.2522E-01

2.5116E+00

-8.4079E+00

1.9921E+01

-3.2150E+01

3.3320E+01

-2.0615E+01

S11

-6.3123E-01

2.2166E+00

-7.6798E+00

1.9395E+01

-3.3650E+01

3.7800E+01

-2.5759E+01

S12

-2.8717E-01

3.9290E-01

-4.6120E-01

4.0806E-01

-2.7013E-01

1.3217E-01

-4.3007E-02

S13

-2.4853E-01

3.3558E-01

-3.5521E-01

2.5892E-01

-1.2749E-01

4.0868E-02

-7.8712E-03

S14

-5.1884E-03

4.2804E-04

6.0879E-03

-3.9674E-03

1.5439E-03

-2.9741E-04

1.9351E-05

Flour mark

A18

A20

A22

A24

A26

A28

A30

S3

-7.9055E-08

9.1209E-10

-3.7774E-12

3.0465E-13

0.0000E+00

S4

-5.2420E-01

1.9679E-01

-5.2759E-02

9.8579E-03

-1.2191E-03

8.9633E-05

-2.9639E-06

S5

-6.1040E-06

1.5670E-07

0.0000E+00

S6

-1.4006E-02

8.6026E-04

1.9092E-04

0.0000E+00

S9

-1.6391E+01

0.0000E+00

S10

6.6098E+00

-7.5913E-01

0.0000E+00

S11

9.4761E+00

-1.3940E+00

0.0000E+00

S12

6.7988E-03

0.0000E+00

S13

7.1252E-04

0.0000E+00

S14

0.0000E+00

TABLE 14

Fig. 20 shows an on-axis chromatic aberration curve of the imaging lens of example seven, which indicates that light rays of different wavelengths are out of focus after passing through the imaging lens. Fig. 21 shows astigmatism curves representing meridional field curvature and sagittal field curvature of the imaging lens of example seven.

As can be seen from fig. 20 and 21, the imaging lens according to example seven can achieve good imaging quality.

To sum up, examples one to seven respectively satisfy the relationships shown in table 15.

Conditional \ example	1	2	3	4	5	6	7
								Semi-FOV(°)	89.8	89.8	89.8	89.8	89.8	89.8	89.8
(f6+f7)/f	-0.09	-0.27	-0.28	-0.09	-0.22	-0.28	-1.11
								f/f7	0.52	0.48	0.43	0.53	0.49	0.48	0.37
f/EPD	2.03	2.00	2.00	2.00	1.83	1.71	2.48
								ImgH/BFL	1.04	1.04	1.03	1.04	0.90	0.89	0.54
f/f2	-0.30	-0.35	-0.38	-0.31	-0.29	-0.28	-0.23
								f3/f5	-1.23	-1.21	-1.19	-1.20	-1.04	-1.10	-0.80
f/f23	-0.77	-0.78	-0.83	-0.78	-0.71	-0.68	-0.62
								R6/R7	0.63	0.55	0.57	0.65	0.63	0.63	1.08
(R11+R12)/(R11-R12)	0.33	0.52	0.50	0.34	0.34	0.36	0.68
								CT4/T23	0.76	0.82	0.94	0.77	0.76	0.75	1.12
(CT5+CT6)/CT7	0.91	0.85	0.90	0.89	0.91	0.91	1.36
								SL/TTL	0.47	0.46	0.44	0.46	0.45	0.45	0.33
DT61/DT71	0.57	0.61	0.52	0.57	0.60	0.60	0.77
								(DT41-DT42)/DT42	0.34	0.36	0.44	0.34	0.28	0.26	0.49
SAG21/SAG11	0.90	0.90	0.74	0.83	0.89	0.91	0.41
								ET2/ET1	0.71	0.67	0.88	0.68	0.76	0.72	1.21
0.3<V4/(V1-V4)<0.9	0.64	0.64	0.64	0.64	0.64	0.64	0.64

Watch 15

Table 16 gives effective focal lengths f of the imaging lenses of example one to example seven, and effective focal lengths f1 to f7 of the respective lenses.

Parameter \ example	1	2	3	4	5	6	7
								TTL(mm)	12.00	12.00	12.64	12.17	12.32	12.32	13.95
ImgH(mm)	2.74	2.74	2.72	2.74	2.35	2.35	1.41
								Semi-FOV(°)	89.8	89.8	89.8	89.8	89.8	89.8	89.8
Fno	2.03	2.00	2.00	2.00	1.83	1.71	2.48
								f(mm)	1.12	1.00	0.90	1.15	1.01	0.99	0.79
f1(mm)	-11.05	-10.86	-13.03	-11.13	-11.01	-11.03	-11.60
								f2(mm)	-3.67	-2.87	-2.35	-3.74	-3.52	-3.48	-3.47
f3(mm)	-3.88	-4.21	-4.05	-3.88	-3.95	-4.09	-3.44
								f4(mm)	3.28	3.34	3.29	3.22	3.25	3.24	3.61
f5(mm)	3.15	3.47	3.39	3.22	3.81	3.71	4.29
								f6(mm)	-2.25	-2.35	-2.36	-2.27	-2.31	-2.34	-3.02
f7(mm)	2.15	2.08	2.11	2.17	2.08	2.06	2.14

TABLE 16

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 device 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 obvious that the above described embodiments are only some of the embodiments of the present invention, and not all of them. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts shall belong to 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 example 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 sequences other 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 includes, in order from an object side to an image side:

a first lens element with refractive power;

a second lens element with refractive power;

a third lens element with negative refractive power;

a fourth lens element with positive refractive power;

a fifth lens element with refractive power;

a sixth lens element with refractive power;

a seventh lens element with positive refractive power;

the surface of the first lens, which faces the object side, is a convex surface; the surface of the third lens facing the image side is a concave surface; the surface of the sixth lens, which faces the object side, is a concave surface; the surface of the seventh lens element facing the image side is a convex surface; the maximum half field angle Semi-FOV of the camera lens meets the following requirements: Semi-FOV > 80.0.

2. The imaging lens according to claim 1, wherein an effective focal length f7 of the seventh lens and an effective focal length f of the imaging lens satisfy: f/f7< 0.8.

3. The imaging lens of claim 1, wherein an effective focal length f of the imaging lens and an entrance pupil diameter EPD of the imaging lens satisfy: f/EPD < 2.8.

4. The imaging lens according to claim 1, wherein a distance BFL on an optical axis between a surface of the seventh lens element facing the image side and an image plane satisfies a condition that ImgH, which is half a diagonal length of an effective pixel region on the image plane, is equal to: 0.2< ImgH/BFL < 1.4.

5. The imaging lens according to claim 1, wherein an effective focal length f2 of the second lens and an effective focal length f of the imaging lens satisfy: -0.6< f/f2< 0.

6. The imaging lens according to claim 1, wherein an effective focal length f3 of the third lens and an effective focal length f5 of the fifth lens satisfy: -1.5< f3/f5< -0.5.

7. The imaging lens according to claim 1, wherein an effective focal length f of the imaging lens and a combined focal length f23 of the second lens and the third lens satisfy: -1.2< f/f23< -0.4.

8. The imaging lens according to claim 1, wherein a radius of curvature R6 of a surface of the third lens facing the image side and a radius of curvature R7 of a surface of the fourth lens facing the object side satisfy: 0.2< R6/R7< 1.4.

9. The imaging lens of claim 1, wherein a radius of curvature R11 of a surface of the sixth lens facing the object side and a radius of curvature R12 of a surface of the sixth lens facing the image side satisfy: (R11+ R12)/(R11-R12) < 1.0.

10. The imaging lens according to claim 1, wherein a center thickness CT4 of the fourth lens on an optical axis and an air interval T23 of the second lens and the third lens on the optical axis satisfy: 0.5< CT4/T23< 1.5.

11. The imaging lens according to claim 1, wherein a center thickness CT5 of the fifth lens on an optical axis, a center thickness CT6 of the sixth lens on the optical axis, and a center thickness CT7 of the seventh lens on the optical axis satisfy: 0.6< (CT5+ CT6)/CT7< 1.6.

12. The imaging lens according to claim 1, wherein an on-axis distance SL from a stop to an imaging plane and an on-axis distance TTL from a surface of the first lens facing the object side to the imaging plane satisfy: SL/TTL < 0.8.

13. The imaging lens according to claim 1, wherein an effective half aperture DT61 of a surface of the sixth lens facing the object side and an effective half aperture DT71 of a surface of the seventh lens facing the object side satisfy: 0.2< DT61/DT71< 1.0.

14. The imaging lens according to claim 1, wherein an effective half aperture DT41 of a surface of the fourth lens facing the object side and an effective half aperture DT42 of a surface of the fourth lens facing the image side satisfy: (DT41-DT42)/DT42< 0.8.

15. The imaging lens according to claim 1, wherein an on-axis distance SAG21 between an intersection point of an optical axis and a surface of the second lens facing the object side to an effective radius vertex of the surface of the second lens facing the object side and an on-axis distance SAG11 between an intersection point of the optical axis and a surface of the first lens facing the object side to an effective radius vertex of the surface of the first lens facing the object side satisfy: 0.2< SAG21/SAG11< 1.2.

16. The imaging lens according to claim 1, wherein an edge thickness ET2 of the second lens and an edge thickness ET1 of the first lens satisfy: 0.3< ET2/ET1< 1.5.

17. The imaging lens according to claim 1, wherein an abbe number V4 of the fourth lens and an abbe number V1 of the first lens satisfy: 0.3< V4/(V1-V4) < 0.9.

18. An imaging lens includes, in order from an object side to an image side:

a first lens element with refractive power;

a second lens element with refractive power;

a third lens element with negative refractive power;

a fourth lens element with positive refractive power;

a fifth lens element with refractive power;

a sixth lens element with refractive power;

a seventh lens element with positive refractive power;

the surface of the first lens, which faces the object side, is a convex surface; the surface of the third lens facing the image side is a concave surface; the surface of the sixth lens, which faces the object side, is a concave surface; the surface of the seventh lens element facing the image side is a convex surface; the effective focal length f of the image pickup lens and the effective focal length f7 of the seventh lens satisfy: f/f7< 0.8.

19. The imaging lens according to claim 18, wherein a maximum half field angle Semi-FOV of the imaging lens satisfies: Semi-FOV > 80.0; the effective focal length f of the camera lens and the entrance pupil diameter EPD of the camera lens meet the following requirements: f/EPD < 2.8.

20. The imaging lens according to claim 18, wherein a distance BFL on an optical axis between a surface of the seventh lens element facing the image side and an image plane satisfies a condition that ImgH, which is half a diagonal length of an effective pixel region on the image plane, is equal to: 0.2< ImgH/BFL < 1.4.

21. The imaging lens of claim 18, wherein an effective focal length f2 between the imaging lens and the second lens satisfies: -0.6< f/f2< 0.

22. The imaging lens of claim 18, wherein an effective focal length f3 of the third lens and an effective focal length f5 of the fifth lens satisfy: -1.5< f3/f5< -0.5.

23. An imaging lens according to claim 18, wherein an effective focal length f of the imaging lens and a combined focal length f23 of the second lens and the third lens satisfy: -1.2< f/f23< -0.4.

24. The imaging lens of claim 18, wherein a radius of curvature R6 of a surface of the third lens facing the image side and a radius of curvature R7 of a surface of the fourth lens facing the object side satisfy: 0.2< R6/R7< 1.4.

25. The imaging lens of claim 18, wherein a radius of curvature R11 of a surface of the sixth lens facing the object side and a radius of curvature R12 of a surface of the sixth lens facing the image side satisfy: (R11+ R12)/(R11-R12) < 1.0.

26. The imaging lens according to claim 18, wherein a center thickness CT4 of the fourth lens on an optical axis and an air interval T23 of the second lens and the third lens on the optical axis satisfy: 0.5< CT4/T23< 1.5.

27. The imaging lens according to claim 18, wherein a center thickness CT5 of the fifth lens on an optical axis, a center thickness CT6 of the sixth lens on the optical axis, and a center thickness CT7 of the seventh lens on the optical axis satisfy: 0.6< (CT5+ CT6)/CT7< 1.6.

28. An imaging lens according to claim 18, wherein an on-axis distance SL from a stop to an imaging plane and an on-axis distance TTL from a surface of the first lens facing the object side to the imaging plane satisfy: SL/TTL < 0.8.

29. The imaging lens according to claim 18, wherein an effective half aperture DT61 of a surface of the sixth lens facing the object side and an effective half aperture DT71 of a surface of the seventh lens facing the object side satisfy: 0.2< DT61/DT71< 1.0.

30. The imaging lens according to claim 18, wherein an effective half aperture DT41 of a surface of the fourth lens facing the object side and an effective half aperture DT42 of a surface of the fourth lens facing the image side satisfy: (DT41-DT42)/DT42< 0.8.

31. The imaging lens of claim 18, wherein an on-axis distance SAG21 between an intersection point of an optical axis and a surface of the second lens facing the object side to an effective radius vertex of the surface of the second lens facing the object side and an on-axis distance SAG11 between an intersection point of the optical axis and a surface of the first lens facing the object side to an effective radius vertex of the surface of the first lens facing the object side satisfy: 0.2< SAG21/SAG11< 1.2.

32. The imaging lens of claim 18, wherein an edge thickness ET2 of the second lens and an edge thickness ET1 of the first lens satisfy: 0.3< ET2/ET1< 1.5.

33. The imaging lens according to claim 18, wherein an abbe number V4 of the fourth lens and an abbe number V1 of the first lens satisfy: 0.3< V4/(V1-V4) < 0.9.