CN217213291U

CN217213291U - Image pickup lens group

Info

Publication number: CN217213291U
Application number: CN202123330888.XU
Authority: CN
Inventors: 贺凌波; 赵跇坤; 戴付建; 赵烈烽
Original assignee: Zhejiang Sunny Optics Co Ltd
Current assignee: Zhejiang Sunny Optics Co Ltd
Priority date: 2021-12-27
Filing date: 2021-12-27
Publication date: 2022-08-16
Anticipated expiration: 2031-12-27

Abstract

The utility model provides a camera lens group. The imaging lens group comprises the following components in sequence from an object side to an image side: a first lens having a negative refractive power; a second lens having negative refractive power, an object side surface of the second lens being convex; a third lens element having a refractive power, an image side surface of the third lens element being concave; a fourth lens having refractive power; a fifth lens having refractive power; wherein, half of the Semi-FOV of the maximum field angle of the image pickup lens group satisfies: Semi-FOV > 80. The utility model provides an optical lens have the little problem of shooting scope among the prior art.

Description

Image pickup lens group

Technical Field

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

Background

With the rapid development of smart phones, people have more and more extensive requirements on mobile phone photographing in daily life, and the requirements on the camera shooting function of the mobile phone are higher and higher, especially when shooting objects with wide visual fields such as mountains, rivers and the like. Wide-angle lenses are increasingly favored, the perspective of the wide-angle lenses is stronger, and the shot pictures emphasize the contrast between the close shot and the distant shot, so that the strong perspective effect is generated in the depth direction. However, in the existing product, the shooting range of the optical lens is small.

That is, the optical lens in the related art has a problem of a small shooting range.

SUMMERY OF THE UTILITY MODEL

A primary object of the present invention is to provide a camera lens assembly for solving the problem of small shooting range of an optical lens in the prior art.

In order to achieve the above object, according to one aspect of the present invention, there is provided an image pickup lens group comprising, in order from an object side to an image side of the image pickup lens group: a first lens having a negative refractive power; a second lens having negative refractive power, an object side surface of the second lens being convex; a third lens element having a refractive power, an image side surface of the third lens element being concave; a fourth lens having refractive power; a fifth lens having refractive power; wherein, half of the Semi-FOV of the maximum field angle of the image pickup lens group satisfies: Semi-FOV > 80.

Further, the central thickness CT4 of the fourth lens on the optical axis and the edge thickness ET4 of the fourth lens satisfy: 3.5 < CT4/ET4 < 5.0.

Further, the effective focal length f of the image pickup lens group and the entrance pupil diameter EPD of the image pickup lens group satisfy: f/EPD < 2.6.

Further, an on-axis distance TTL from the object side surface of the first lens to the imaging surface and an air interval T12 on the optical axis between the first lens and the second lens satisfy: 4.0 < TTL/T12 < 5.0.

Further, between the edge thickness ET5 of the fifth lens and the central thickness CT5 of the fifth lens on the optical axis, it suffices that: 1.5 < ET5/CT5 < 2.5.

Further, the on-axis distance SAG51 between the edge thickness ET5 of the fifth lens and the intersection point of the object side surface of the fifth lens and the optical axis and the effective radius vertex of the object side surface of the fifth lens satisfies the following condition: 6.5 < ET5/SAG51 < -1.5.

Further, the on-axis distance SAG42 between the central thickness CT4 of the fourth lens on the optical axis and the intersection point of the image-side surface of the fourth lens and the optical axis and the effective radius vertex of the image-side surface of the fourth lens satisfies: 2.5 < CT4/SAG42 < -1.5.

Further, the central thickness CT3 of the third lens on the optical axis and the central thickness CT2 of the second lens on the optical axis satisfy: 1.0 < CT3/CT2 < 2.0.

Further, the air interval T12 of the first lens and the second lens on the optical axis, the center thickness CT1 of the first lens on the optical axis satisfy: 3.0 < T12/CT1 < 6.0.

Further, a radius of curvature R7 of the object-side surface of the fourth lens and a radius of curvature R8 of the image-side surface of the fourth lens satisfy: 3.5 < (R8-R7)/(R8+ R7) < 14.0.

Further, the curvature radius R4 of the image side surface of the second lens and the effective focal length f of the image pickup lens group satisfy: r4/f is more than 3.0 and less than 6.0.

Further, the abbe number V5 of the fifth lens satisfies: v5 < 20.0.

Further, the effective focal length f1 of the first lens, the curvature radius R1 of the surface of the first lens facing the light-in side and the curvature radius R2 of the surface of the first lens facing the light-out side satisfy the following conditions: -1.5 < f1/(R1+ R2) < -0.6.

According to another aspect of the present invention, there is provided a photographing lens assembly including, in order from an object side to an image side of the photographing lens assembly: a first lens having a negative refractive power; a second lens having negative refractive power, an object side surface of the second lens being convex; a third lens element having a refractive power, an image side surface of the third lens element being concave; a fourth lens having refractive power; a fifth lens having refractive power; wherein, half of the Semi-FOV of the maximum field angle of the image pickup lens group satisfies: Semi-FOV > 80 °; the combined focal length f45 of the fourth lens and the fifth lens and the effective focal length f of the shooting lens group satisfy that: f45/f is more than 0.5 and less than 1.5.

Further, the edge thickness ET5 of the fifth lens and the central thickness CT5 of the fifth lens on the optical axis satisfy: 1.5 < ET5/CT5 < 2.5.

Further, the distance between the edge thickness ET5 of the fifth lens and the on-axis distance SAG51 from the intersection point of the object side surface and the optical axis of the fifth lens to the effective radius vertex of the object side surface of the fifth lens satisfies the following condition: 6.5 < ET5/SAG51 < -1.5.

Further, an air interval T12 of the first lens and the second lens on the optical axis, a center thickness CT1 of the first lens on the optical axis satisfy: T12/CT1 is more than 3.0 and less than 6.0.

Further, the abbe number V5 of the fifth lens satisfies: v5 < 20.0.

Further, the combined focal length f45 of the fourth lens and the fifth lens and the effective focal length f of the image pickup lens group satisfy: f45/f is more than 0.5 and less than 1.5.

Use the technical scheme of the utility model, include in order by the object side of the battery of lens of making a video recording to picture side: a first lens, a second lens, a third lens, a fourth lens, and a fifth lens, the first lens having a negative refractive power; the second lens has negative refractive power, and the object side surface of the second lens is convex; the third lens has refractive power, and the image side surface of the third lens is concave; the fourth lens has refractive power; the fifth lens has refractive power; wherein a half of the Semi-FOV of the maximum field angle of the image pickup lens group satisfies: Semi-FOV > 80.

The image pickup lens group has an advantage of a large angle of view by setting the refractive power of the first lens to be negative, and setting the refractive power of the second lens to be negative with the object-side surface of the second lens being convex is advantageous for increasing the angle of view while correcting the off-axis aberration of the image pickup lens group. The image side face matched with the third lens is concave, so that the image quality of the camera lens group can be effectively improved, and the imaging quality of the camera lens group is ensured. And the maximum half field angle of the image pickup lens group is controlled to be larger than 80 degrees, which is beneficial to expanding the obtained object information so as to enlarge the shooting range of the image pickup lens group.

Drawings

The accompanying drawings, which form a part of the specification, are included to provide a further understanding of the invention, and are incorporated in and constitute a part of this specification, illustrate exemplary embodiments of the invention and together with the description serve to explain the invention and do not constitute a limitation on the scope of the invention. In the drawings:

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

fig. 2 to 4 show an on-axis chromatic aberration curve, an astigmatism curve, and a chromatic aberration of magnification curve, respectively, of the imaging lens group in fig. 1;

fig. 5 is a schematic view showing a configuration of an imaging lens group according to a second example of the present invention;

fig. 6 to 8 show an on-axis chromatic aberration curve, an astigmatism curve, and a chromatic aberration of magnification curve, respectively, of the imaging lens group in fig. 5;

fig. 9 is a schematic view showing a configuration of an imaging lens group according to a third example of the present invention;

fig. 10 to 12 show an on-axis chromatic aberration curve, an astigmatism curve, and a chromatic aberration of magnification curve, respectively, of the imaging lens group in fig. 9;

fig. 13 is a schematic view showing a configuration of an imaging lens group according to a fourth example of the present invention;

fig. 14 to 16 show an on-axis chromatic aberration curve, an astigmatism curve, and a chromatic aberration of magnification curve, respectively, of the imaging lens group in fig. 13;

fig. 17 is a schematic view showing a configuration of an imaging lens group according to a fifth example of the present invention;

fig. 18 to 20 show an on-axis chromatic aberration curve, an astigmatism curve, and a magnification chromatic aberration curve, respectively, of the imaging lens group in fig. 17;

fig. 21 is a schematic view showing a configuration of an imaging lens group according to a sixth example of the present invention;

fig. 22 to 24 show an on-axis chromatic aberration curve, an astigmatism curve, and a magnification chromatic aberration curve, respectively, of the imaging lens group in fig. 21;

wherein the figures include the following reference numerals:

STO, stop; e1, first lens; s1, the object 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 element; 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, a filter plate; s11, the object side surface of the filter plate; s12, the image side surface of the filter plate; and S13, 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 words such as "upper, lower, top and bottom" is generally with respect to the orientation shown in the drawings, or with respect to the component itself in the vertical, perpendicular or gravitational direction; similarly, "inner and outer" refer to the inner and outer relative to the contours of the components themselves for ease of understanding and description, but the above directional terms 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 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. When the R value is positive, the object side surface is judged to be convex, and when the R value is negative, the object side surface is judged to be concave; the image side surface is determined to be concave when the R value is positive, and convex when the R value is negative.

In order to solve the problem that the shooting range is small in the optical lens in the prior art, the utility model provides a camera lens group.

As shown in fig. 1 to 24, the imaging lens group includes, in order from an object side to an image side: a first lens, a second lens, a third lens, a fourth lens, and a fifth lens, the first lens having a negative refractive power; the second lens has negative refractive power, and the object side surface of the second lens is convex; the third lens has refractive power, and the image side surface of the third lens is concave; the fourth lens has refractive power; the fifth lens has refractive power; wherein, half of the Semi-FOV of the maximum field angle of the image pickup lens group satisfies: Semi-FOV > 80.

The image pickup lens group has an advantage of a large angle of view by setting the refractive power of the first lens to be negative, and setting the refractive power of the second lens to be negative with the object-side surface of the second lens being convex is advantageous for increasing the angle of view while correcting the off-axis aberration of the image pickup lens group. The image side face matched with the third lens is concave, so that the image quality of the camera lens group can be effectively improved, and the imaging quality of the camera lens group is ensured. And the maximum half field angle of the image pickup lens group is controlled to be more than 80 degrees, which is beneficial to expanding the obtained object information so as to enlarge the shooting range of the image pickup lens group.

In the present embodiment, the central thickness CT4 of the fourth lens on the optical axis and the edge thickness ET4 of the fourth lens satisfy: 3.5 < CT4/ET4 < 5.0. By controlling the CT4/ET4 within a reasonable range, the processing difficulty of the lens can be reduced, the angle between the principal ray and the optical axis when the principal ray is incident on the image plane can be reduced, and the relative illumination of the image plane is improved. Preferably 3.8 < CT4/ET4 < 4.8.

In the present embodiment, the effective focal length f of the imaging lens group and the entrance pupil diameter EPD of the imaging lens group satisfy: f/EPD < 2.6. The ratio of the effective focal length of the camera lens group to the diameter of the entrance pupil of the camera lens group is reasonably controlled within a reasonable range, so that the camera lens group is favorable for realizing a larger field angle, shoots a wider field of view and obtains a larger clear imaging range. Preferably, 1.5 < f/EPD < 2.5.

In the present embodiment, an on-axis distance TTL from the object side surface of the first lens to the image plane, and an air interval T12 on the optical axis between the first lens and the second lens satisfy: 4.0 < TTL/T12 < 5.0. The ratio of the distance from the object side surface of the first lens to the imaging surface on the axis to the air space of the first lens and the second lens on the optical axis is reasonably controlled within a reasonable range, and the size distribution of the lenses is reasonably distributed to obtain high resolution. Preferably, 4.1 < TTL/T12 < 4.8.

In the present embodiment, the edge thickness ET5 of the fifth lens and the central thickness CT5 of the fifth lens on the optical axis satisfy: 1.5 < ET5/CT5 < 2.5. By reasonably controlling the ratio range of ET5 and CT5, the processing difficulty of the lens can be reduced, the angle between the principal ray incident on the image plane and the optical axis can be reduced, and the relative illumination of the image plane can be improved. Preferably, 1.52 < ET5/CT5 < 2.5.

In the present embodiment, the on-axis distance SAG51 between the edge thickness ET5 of the fifth lens and the intersection point of the object-side surface of the fifth lens and the optical axis to the effective radius vertex of the object-side surface of the fifth lens satisfies: 6.5 < ET5/SAG51 < -1.5. The ET5/SAG51 is controlled within a reasonable range, so that the angle of the chief ray of the photographing lens group is adjusted, the relative brightness of the photographing lens group can be effectively improved, the image plane definition is improved, and the imaging quality of the photographing lens group is ensured. Preferably, -6.5 < ET5/SAG51 < -1.7.

In the present embodiment, the on-axis distance SAG42 between the central thickness CT4 of the fourth lens on the optical axis and the intersection point of the image-side surface of the fourth lens and the optical axis to the effective radius vertex of the image-side surface of the fourth lens satisfies: 2.5 < CT4/SAG42 < -1.5. By controlling the CT4/SAG42 within a reasonable range, the light angle of the camera lens group can be adjusted, the relative brightness of the camera lens group can be effectively improved, the image plane definition is improved, and the imaging quality of the camera lens group is improved. Preferably, -2.4 < CT4/SAG42 < -1.6.

In the present embodiment, the central thickness CT3 of the third lens on the optical axis and the central thickness CT2 of the second lens on the optical axis satisfy: 1.0 < CT3/CT2 < 2.0. The ratio of the central thickness of the third lens on the optical axis to the central thickness of the second lens on the optical axis is controlled within a certain range, so that the optical lens has good processing characteristics. Preferably, 1.1 < CT3/CT2 < 1.9.

In the present embodiment, the air interval T12 of the first lens and the second lens on the optical axis, and the center thickness CT1 of the first lens on the optical axis satisfy: T12/CT1 is more than 3.0 and less than 6.0. The ratio of the air interval of the first lens and the second lens on the optical axis to the central thickness of the first lens on the optical axis is controlled within a certain range, and the on-axis aberration generated by the first lens can be effectively balanced. Preferably, 3.2 < T12/CT1 < 5.8.

In the present embodiment, a radius of curvature R7 of the object-side surface of the fourth lens and a radius of curvature R8 of the image-side surface of the fourth lens satisfy: 3.5 < (R8-R7)/(R8+ R7) < 14.0. The curvature radius of the object side surface of the fourth lens and the curvature radius of the image side surface of the fourth lens are reasonably controlled, the fourth lens is favorably ensured to have proper refractive power, the included angle between the chief ray and the optical axis is reduced when the chief ray enters the image side, the illumination of the image surface is improved, and the packaging camera lens group can clearly image under the condition of a large field angle. Preferably 3.52 < (R8-R7)/(R8+ R7) < 13.95.

In the present embodiment, a radius of curvature R4 of the image-side surface of the second lens and an effective focal length f of the image pickup lens group satisfy: r4/f is more than 3.0 and less than 6.0. By controlling the R4/f within a certain range, the deflection angle of the off-axis field ray on the image side surface of the second lens can be controlled, and the matching degree with the chip is increased. Preferably, 3.1 < R4/f < 6.0.

In the present embodiment, the abbe number V5 of the fifth lens satisfies: v5 < 20.0. The Abbe number of the fifth lens is controlled to be smaller than a certain range, so that the chromatic aberration of the camera lens group is optimized, and the imaging quality of the camera lens group is improved. Preferably 18 < V5 < 20.0.

In the present embodiment, the effective focal length f1 of the first lens, the radius of curvature R1 of the surface of the first lens facing the light-in side, and the radius of curvature R2 of the surface of the first lens facing the light-out side satisfy: -1.5 < f1/(R1+ R2) < -0.6. By limiting f1/(R1+ R2) within a reasonable range, the first lens can be manufactured and molded easily while the focal length of the first lens is ensured. Preferably, -1.4 < f1/(R1+ R2) < -0.7.

Example two

As shown in fig. 1 to 24, the imaging lens group includes, in order from an object side to an image side: the lens comprises a first lens, a second lens, a third lens, a fourth lens and a fifth lens. The first lens has a negative refractive power; the second lens has negative refractive power, and the object side surface of the second lens is convex; the third lens has refractive power, and the image side surface of the third lens is concave; the fourth lens has refractive power; the fifth lens has refractive power; wherein, half of the Semi-FOV of the maximum field angle of the image pickup lens group satisfies: the combined focal length f45 of the Semi-FOV > 80 DEG fourth lens and the fifth lens and the effective focal length f of the image pickup lens group satisfy that: f45/f is more than 0.5 and less than 1.5.

The image pickup lens group has an advantage of a large angle of view by setting the refractive power of the first lens to be negative, and setting the refractive power of the second lens to be negative with the object-side surface of the second lens being convex is advantageous for increasing the angle of view while correcting the off-axis aberration of the image pickup lens group. The image side face matched with the third lens is concave, so that the image quality of the camera lens group can be effectively improved, and the imaging quality of the camera lens group is ensured. The ratio of the combined focal length of the fourth lens and the fifth lens to the effective focal length of the camera lens group is controlled within a reasonable range, so that the camera lens group can better balance aberration, and the resolution of the system can be improved. And the maximum half field angle of the image pickup lens group is controlled to be larger than 80 degrees, which is beneficial to expanding the obtained object information so as to enlarge the shooting range of the image pickup lens group.

Preferably, the combined focal length f45 of the fourth lens and the fifth lens and the effective focal length f of the image pickup lens group satisfy: f45/f is more than 0.7 and less than 1.48.

In the present embodiment, an on-axis distance TTL from the object-side surface of the first lens to the imaging surface, and an air interval T12 on the optical axis between the first lens and the second lens satisfy: 4.0 < TTL/T12 < 5.0. The ratio of the distance from the object side surface of the first lens to the imaging surface on the axis to the air space of the first lens and the second lens on the optical axis is reasonably controlled within a reasonable range, and the size distribution of the lenses is reasonably distributed to obtain high resolution. Preferably, 4.1 < TTL/T12 < 4.8.

In the present embodiment, the on-axis distance SAG51 between the edge thickness ET5 of the fifth lens and the intersection point of the object-side surface of the fifth lens and the optical axis to the effective radius vertex of the object-side surface of the fifth lens satisfies: 6.5 < ET5/SAG51 < -1.5. By controlling the ET5/SAG51 within a reasonable range, the main ray angle of the shooting lens group is adjusted, the relative brightness of the shooting lens group can be effectively improved, the image plane definition is improved, and the imaging quality of the shooting lens group is ensured. Preferably, -6.5 < ET5/SAG51 < -1.7.

In the embodiment, the central thickness CT4 of the fourth lens on the optical axis and the axial distance SAG42 from the intersection point of the image side surface of the fourth lens and the optical axis to the effective radius vertex of the image side surface of the fourth lens satisfy the following conditions: 2.5 < CT4/SAG42 < -1.5. By controlling the CT4/SAG42 within a reasonable range, the light angle of the camera lens group can be adjusted, the relative brightness of the camera lens group can be effectively improved, the image plane definition is improved, and the imaging quality of the camera lens group is improved. Preferably, -2.4 < CT4/SAG42 < -1.6.

In the present embodiment, the air interval T12 of the first lens and the second lens on the optical axis, and the center thickness CT1 of the first lens on the optical axis satisfy: T12/CT1 is more than 3.0 and less than 6.0. The ratio of the air interval of the first lens and the second lens on the optical axis to the central thickness of the first lens on the optical axis is controlled within a certain range, so that the on-axis aberration generated by the first lens can be effectively balanced. Preferably, 3.2 < T12/CT1 < 5.8.

In the present embodiment, a radius of curvature R4 of the image side surface of the second lens and an effective focal length f of the image pickup lens group satisfy: r4/f is more than 3.0 and less than 6.0. By controlling the R4/f within a certain range, the deflection angle of the off-axis field ray on the image side surface of the second lens can be controlled, and the matching degree with the chip is increased. Preferably, 3.1 < R4/f < 6.0.

Optionally, the above-mentioned image pickup lens group may further include a filter for correcting color deviation and/or a protective glass for protecting a photosensitive element located on an image forming surface.

The imaging lens group in the present application may employ a plurality of lenses, for example, the above five lenses. 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 group 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 group is more beneficial to production and processing and can be suitable for portable electronic equipment such as smart phones.

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 a better curvature radius characteristic, and has advantages of improving distortion aberration and improving astigmatism 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 constituting the imaging lens group can be varied to achieve the various results and advantages described in this specification without departing from the claimed subject matter. For example, although five lenses are exemplified in the embodiments, the image pickup lens group is not limited to include five lenses. The imaging lens group may also include other numbers of lenses, as desired.

Specific surface types and parameters of the imaging lens group 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 six is applicable to all embodiments of the present application.

Example one

As shown in fig. 1 to 4, an image pickup lens group of the first example of the present application is described. Fig. 1 shows a schematic diagram of an image pickup lens group structure of example one.

As shown in fig. 1, the image capturing lens assembly includes, in order from the light incident side to the light exit side, a first lens E1, a stop STO, a second lens E2, a third lens E3, a fourth lens E4, a fifth lens E5, a filter E6, and an image plane S13.

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

In this example, the total effective focal length f of the image pickup lens group is 1.09mm, the total length TTL of the image pickup lens group is 4.68mm, and the image height ImgH is 1.32 mm.

Table 1 shows a basic structural parameter table of an imaging lens group of example one, in which the units of the radius of curvature, thickness/distance, focal length, and effective radius 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 element E1 through the fifth lens element E5 are aspheric, and the surface shape 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 A4, A6, A8, A10, A12, A14, A16, A18, A20, A22, A24, A26, A28, A30, which can be used for each of the aspherical mirrors S1-S10 in example one.

Flour mark

A4

A6

A8

A10

A12

A14

A16

S1

-4.8660E-01

-7.2375E-02

6.9827E-03

-1.2563E-02

-2.5946E-03

-3.5206E-04

-9.1837E-04

S2

6.4696E-02

-2.4145E-02

5.3717E-03

1.4811E-03

-3.1773E-04

-2.0508E-04

1.3343E-04

S3

-1.5431E-02

-7.6480E-04

-2.1235E-05

-5.9121E-05

1.9741E-05

-2.0186E-05

8.6012E-06

S4

-8.6187E-02

1.1019E-03

-2.4039E-04

5.3691E-05

-1.7946E-04

2.8027E-05

-3.1899E-05

S5

-1.0553E-01

4.2620E-03

-8.1329E-05

-9.1162E-04

-6.3728E-04

-6.9247E-05

-2.9421E-05

S6

-1.8365E-01

1.9448E-02

-3.3152E-03

1.2663E-03

-7.7943E-04

1.3220E-04

-8.3119E-05

S7

-2.9332E-01

3.5196E-02

-1.2746E-02

4.0151E-03

-1.5912E-03

6.1739E-04

-3.4230E-04

S8

1.1023E-01

-2.1582E-02

-1.3021E-03

4.1438E-03

2.3682E-03

-2.2668E-03

1.3063E-03

S9

-1.5875E-01

2.0417E-02

2.6455E-03

-3.4991E-03

2.1632E-03

-6.9414E-04

4.7725E-05

S10

-3.0456E-01

1.7050E-02

-4.9512E-04

-4.4519E-03

1.5716E-03

-5.1403E-04

2.3274E-05

Flour mark

A18

A20

A22

A24

A26

A28

A30

S1

-2.4882E-04

-6.4821E-05

-4.8905E-05

-9.0051E-05

-1.5798E-05

5.2329E-07

-3.9765E-05

S2

-4.8403E-05

-1.7962E-05

-7.9539E-05

5.1896E-05

6.0023E-07

1.9140E-05

-1.1965E-05

S3

-1.1108E-05

5.3400E-06

-4.5387E-06

5.6763E-06

-1.5714E-06

4.0157E-06

-2.8181E-06

S4

1.5512E-05

-8.6761E-06

7.7524E-06

-1.6081E-06

2.2971E-07

-1.3229E-06

4.9347E-07

S5

-2.0169E-06

-2.8411E-06

-5.5539E-06

1.1437E-06

-5.5802E-06

-1.9178E-06

-6.9133E-06

S6

2.7767E-05

-8.9930E-06

-1.5870E-06

1.6868E-06

-1.6518E-06

2.8897E-06

-9.5462E-07

S7

1.3388E-04

-3.7511E-05

2.5043E-05

-5.1173E-06

-3.1786E-06

4.5205E-06

-1.6246E-06

S8

-7.8567E-04

2.8110E-06

6.9875E-05

3.0286E-04

3.1063E-04

-8.2028E-05

-1.5022E-05

S9

-5.4359E-05

-4.2159E-05

1.0545E-04

-3.2392E-05

-7.4987E-06

4.1102E-06

-3.7120E-07

S10

7.0206E-05

-8.6720E-05

1.6113E-05

-1.0255E-05

2.3407E-05

3.8260E-05

-2.7632E-05

S9

-8.8548E-05

-1.8605E-05

-1.2642E-05

-1.1039E-04

7.8904E-05

3.9312E-05

-1.9388E-06

S10

9.6565E-05

2.4928E-04

-5.2680E-05

-5.8526E-05

7.2551E-06

-9.1126E-05

-2.4968E-06

TABLE 2

Fig. 2 shows an on-axis chromatic aberration curve of the image pickup lens group of the first example, which shows the deviation of the convergent focus of light rays of different wavelengths after passing through the image pickup lens group. Fig. 3 shows astigmatism curves of the imaging lens group of the first example, which represent meridional field curvature and sagittal field curvature. Fig. 4 shows a chromatic aberration of magnification curve of the imaging lens group of the first example, which represents a deviation of different image heights on the image formation plane after light passes through the imaging lens group.

As can be seen from fig. 2 to 4, the imaging lens group given in example one can achieve good imaging quality.

Example two

As shown in fig. 5 to 8, an image pickup lens group 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. 5 shows a schematic diagram of an image pickup lens group structure of example two.

As shown in fig. 5, the image capturing lens assembly includes, in order from the light incident side to the light exit side, a first lens E1, a stop STO, a second lens E2, a third lens E3, a fourth lens E4, a fifth lens E5, a filter E6, and an image plane S13.

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

In this example, the total effective focal length f of the image pickup lens group is 1.03mm, the total length TTL of the image pickup lens group is 4.72mm, and the image height ImgH is 1.32 mm.

Table 3 shows a basic structural parameter table of the image pickup lens group of example two, in which the units of the curvature radius, the thickness/distance, the focal length, and the effective radius 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

S1

-3.6559E-01

-8.8886E-02

1.8282E-03

-1.1313E-02

-9.0115E-04

-1.3102E-03

-5.1178E-04

S2

1.4212E-01

-3.8513E-03

2.4041E-03

-1.4021E-03

-6.3413E-04

2.4047E-04

6.7476E-04

S3

-1.4694E-02

-1.0623E-03

-1.9585E-04

-1.0869E-05

-9.9096E-06

2.5141E-06

-1.2022E-06

S4

-9.4807E-02

2.4716E-04

-8.9410E-04

8.2624E-05

-8.1890E-05

2.0623E-05

-2.9806E-06

S5

-1.1495E-01

4.8211E-03

-3.8952E-04

5.0985E-04

-2.5690E-05

1.5171E-04

5.6510E-05

S6

-1.7376E-01

1.7865E-02

-3.6828E-03

1.0217E-03

-4.7343E-04

1.3107E-04

-3.2396E-05

S7

-2.9333E-01

4.2947E-02

-1.0390E-02

1.6531E-03

-1.4803E-03

3.3595E-04

-1.6332E-04

S8

3.2547E-02

-6.4438E-03

-1.0700E-02

4.7021E-03

-1.4310E-03

3.4026E-03

-1.5618E-03

S9

-5.2289E-02

1.9130E-02

-4.1255E-03

6.8020E-03

-1.1231E-03

2.3754E-03

-8.1025E-04

S10

-2.0378E-01

-3.3046E-03

9.9773E-03

-1.0942E-03

-6.7676E-04

-8.0193E-04

-4.1071E-07

Flour mark

A18

A20

A22

A24

A26

A28

A30

S1

-3.0059E-04

-1.1766E-04

-6.0550E-05

2.2854E-06

-7.5403E-06

-1.8877E-05

-2.2751E-05

S2

5.8112E-04

4.1970E-04

2.1011E-04

9.1005E-05

6.2971E-06

-8.7793E-06

-7.7871E-06

S3

3.2291E-07

-1.2792E-06

2.2693E-07

-4.8603E-07

6.2265E-07

-3.6202E-09

-8.0086E-08

S4

5.6371E-06

2.8878E-06

3.3583E-06

2.6174E-06

1.2432E-06

1.1147E-06

2.8679E-07

S5

5.2403E-05

2.5887E-05

1.9166E-05

8.3567E-06

3.7367E-06

1.5465E-07

2.1207E-07

S6

1.8812E-05

-5.9582E-06

7.8112E-07

-5.2302E-07

7.9614E-08

5.5726E-07

-2.0433E-07

S7

3.9012E-05

-2.9891E-05

1.2341E-05

-3.2068E-06

1.0730E-06

-1.0520E-06

1.3898E-06

S8

-3.0402E-05

-1.5930E-04

3.7440E-04

-2.4335E-04

-2.7262E-04

-1.9300E-04

1.5985E-05

S9

-1.6802E-04

-5.6494E-04

4.0717E-05

-5.2493E-06

9.3919E-06

-6.8260E-05

-4.9938E-06

S10

5.1820E-04

2.8501E-04

-8.7405E-05

-4.8323E-04

-3.6251E-04

-1.4144E-04

-2.4790E-05

TABLE 4

Fig. 6 shows an on-axis chromatic aberration curve of the imaging lens group of example two, which indicates the deviation of the convergent focus of light rays of different wavelengths after passing through the imaging lens group. Fig. 7 shows astigmatism curves representing meridional field curvature and sagittal field curvature of the imaging lens group of example two. Fig. 8 shows a chromatic aberration of magnification curve of the imaging lens group of example two, which represents the deviation of different image heights on the imaging surface after light passes through the imaging lens group.

As can be seen from fig. 6 to 8, the imaging lens group according to example two can achieve good imaging quality.

Example III

As shown in fig. 9 to 12, an image pickup lens group of example three of the present application is described. Fig. 9 shows a schematic diagram of an image pickup lens group structure of example three.

As shown in fig. 9, the image capturing lens assembly includes, in order from the light incident side to the light exit side, a first lens E1, a stop STO, a second lens E2, a third lens E3, a fourth lens E4, a fifth lens E5, a filter E6, and an image plane S13.

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

In this example, the total effective focal length f of the image pickup lens group is 1.04mm, the total length TTL of the image pickup lens group is 4.39mm, and the image height ImgH is 1.32 mm.

Table 5 shows a basic structural parameter table of the image pickup lens group of example three, in which the units of the curvature radius, thickness/distance, focal length, and effective radius 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.

TABLE 6

Fig. 10 shows on-axis chromatic aberration curves of the image pickup lens group of example three, which represent the deviation of the convergent focus of light rays of different wavelengths after passing through the image pickup lens group. Fig. 11 shows astigmatism curves representing meridional field curvature and sagittal field curvature of the imaging lens group of example three. Fig. 12 shows a chromatic aberration of magnification curve of the imaging lens group of example three, which represents a deviation of different image heights on an image formation plane after light passes through the imaging lens group.

As can be seen from fig. 10 to 12, the imaging lens group given in example three can achieve good imaging quality.

Example four

As shown in fig. 13 to 16, an image pickup lens group of the present example four is described. Fig. 13 shows a schematic diagram of an image pickup lens group structure of example four.

As shown in fig. 13, the image capturing lens group includes, in order from the light incident side to the light exiting side, a first lens E1, a stop STO, a second lens E2, a third lens E3, a fourth lens E4, a fifth lens E5, a filter E6, and an image plane S13.

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

In this example, the total effective focal length f of the image pickup lens group is 1.10mm, the total length TTL of the image pickup lens group is 4.51mm, and the image height ImgH is 1.32 mm.

Table 7 shows a basic structural parameter table of the image pickup lens group of example four, in which the units of the curvature radius, the thickness/distance, the focal length, and the effective radius 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.

Flour mark

A4

A6

A8

A10

A12

A14

A16

S1

-4.5077E-01

-7.4333E-02

4.4402E-03

-1.2208E-02

-1.1371E-03

-9.5839E-04

-7.0765E-04

S2

7.1528E-02

-2.2808E-02

3.3840E-03

-2.0963E-04

-3.6933E-04

-5.1488E-05

6.8604E-05

S3

-1.6537E-02

-7.6807E-04

-4.8318E-05

-6.7321E-06

-4.4128E-06

-4.7303E-07

-2.8103E-06

S4

-8.6991E-02

-1.3204E-03

6.5102E-04

8.6899E-05

-9.4347E-05

1.8765E-05

-3.1025E-05

S5

-1.0410E-01

3.7781E-03

1.4158E-03

-9.8231E-04

-1.0050E-03

-2.6195E-04

-1.8813E-04

S6

-1.8965E-01

1.9583E-02

-3.4619E-03

1.4133E-03

-7.1489E-04

1.0061E-04

-3.6089E-05

S7

-3.0749E-01

4.2437E-02

-1.4792E-02

3.6520E-03

-1.8322E-03

6.0470E-04

-2.1786E-04

S8

1.1781E-01

-3.5104E-02

3.4478E-03

-3.9096E-03

1.4378E-03

-5.3778E-04

1.9980E-04

S9

-1.1002E-01

2.4954E-02

3.5690E-03

-3.0174E-03

2.3183E-03

-5.4598E-04

-2.5528E-05

S10

-2.7903E-01

3.1602E-02

-2.5578E-03

-1.0174E-03

8.0323E-04

-1.9444E-04

3.2540E-05

Flour mark

A18

A20

A22

A24

A26

A28

A30

S1

-2.0009E-04

-9.7509E-05

-5.7306E-05

-4.9084E-05

-2.6772E-05

-2.7889E-05

-5.6105E-06

S2

-1.2165E-05

1.5994E-05

3.4613E-08

1.6524E-05

-4.4465E-06

4.7865E-06

-6.0572E-06

S3

-1.4528E-06

-2.4470E-06

-9.6114E-07

-8.8915E-07

7.2381E-07

6.2902E-07

7.1977E-07

S4

-2.9893E-05

-4.6472E-05

-4.1240E-05

-3.6306E-05

-2.6375E-05

-1.3473E-05

-4.8555E-06

S5

-5.0076E-05

2.6919E-05

8.3035E-05

7.5266E-05

5.2065E-05

2.5409E-05

7.1977E-06

S6

-6.1303E-07

-2.5043E-07

-1.7855E-05

6.6858E-07

-7.5663E-06

1.3009E-06

-1.5494E-06

S7

7.9361E-05

-2.5114E-05

1.2119E-05

5.6836E-06

-3.4820E-06

1.6791E-06

-6.2335E-07

S8

-6.6505E-05

-3.2016E-05

9.2271E-05

-2.1732E-05

3.3962E-07

3.1541E-06

1.3488E-07

S9

-1.7654E-05

-2.7352E-05

8.6776E-05

-3.3865E-05

-7.8142E-06

5.1708E-06

-4.1396E-07

S10

-3.8001E-05

-1.0951E-05

1.7431E-05

1.2171E-06

-1.8212E-06

2.2069E-07

-2.6134E-07

TABLE 8

Fig. 14 shows on-axis chromatic aberration curves of the image pickup lens group of example four, which represent deviation of convergent focuses of light rays of different wavelengths after passing through the image pickup lens group. Fig. 15 shows astigmatism curves representing meridional field curvature and sagittal field curvature of the image pickup lens group of example four. Fig. 16 shows a chromatic aberration of magnification curve of the imaging lens group of example four, which represents a deviation of different image heights on the image formation plane after light passes through the imaging lens group.

As can be seen from fig. 14 to 16, the imaging lens group given in example four can achieve good imaging quality.

Example five

As shown in fig. 17 to 20, an image pickup lens group of example five of the present application is described. Fig. 17 shows a schematic diagram of an image pickup lens group structure of example five.

As shown in fig. 17, the image capturing lens group includes, in order from the light incident side to the light exit side, a first lens E1, a stop STO, a second lens E2, a third lens E3, a fourth lens E4, a fifth lens E5, a filter E6, and an image plane S13.

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

In this example, the total effective focal length f of the image pickup lens group is 1.10mm, the total length TTL of the image pickup lens group is 4.50mm, and the image height ImgH is 1.32 mm.

Table 9 shows a basic structural parameter table of the imaging lens group of example five, in which the units of the radius of curvature, thickness/distance, focal length, and effective radius 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.

Watch 10

Fig. 18 shows an on-axis chromatic aberration curve of an imaging lens group of example five, which represents a convergent focus deviation of light rays of different wavelengths after passing through the imaging lens group. Fig. 19 shows astigmatism curves of the imaging lens group of example five, which represent meridional field curvature and sagittal field curvature. Fig. 20 shows a chromatic aberration of magnification curve of the imaging lens group of example five, which represents deviation of different image heights on an imaging surface after light passes through the imaging lens group.

As can be seen from fig. 18 to 20, the imaging lens group given in example five can achieve good imaging quality.

Example six

As shown in fig. 21 to 24, an image pickup lens group of example six of the present application is described. Fig. 21 shows a schematic diagram of an image pickup lens group structure of example six.

As shown in fig. 21, the image capturing lens assembly includes, in order from the light incident side to the light exit side, a first lens E1, a stop STO, a second lens E2, a third lens E3, a fourth lens E4, a fifth lens E5, a filter E6, and an image plane S13.

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

In this example, the total effective focal length f of the image pickup lens group is 0.79mm, the total length TTL of the image pickup lens group is 4.08mm, and the image height ImgH is 1.32 mm.

Table 11 shows a basic structural parameter table of the image pickup lens group of example six, in which the units of the radius of curvature, thickness/distance, focal length, and effective radius 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. 22 shows an on-axis chromatic aberration curve of an imaging lens group of example six, which represents a convergent focus deviation of light rays of different wavelengths after passing through the imaging lens group. Fig. 23 shows astigmatism curves representing meridional field curvature and sagittal field curvature of the imaging lens group of example six. Fig. 24 shows a chromatic aberration of magnification curve of the imaging lens group of example six, which represents a deviation of different image heights on an image formation plane after light passes through the imaging lens group.

As can be seen from fig. 22 to 24, the imaging lens group given in example six can achieve good imaging quality.

To sum up, examples one to six satisfy the relationships shown in table 13, respectively.

Conditional formula/example	1	2	3	4	5	6
							FOV	166.5	169.3	167.0	165.8	165.8	170.3
f/EPD	2.23	2.23	2.23	2.23	2.23	2.23
							CT4/ET4	4.43	4.33	4.02	4.53	4.57	4.14
TTL/T12	4.21	4.18	4.52	4.36	4.44	4.66
							ET5/CT5	1.56	1.74	1.89	1.63	1.61	2.48
ET5/SAG51	-6.44	-1.83	-5.30	-3.29	-3.47	-4.81
							CT4/SAG42	-2.00	-1.82	-2.24	-1.82	-1.74	-2.27
CT3/CT2	1.30	1.81	1.26	1.67	1.85	1.12
							T12/CT1	5.55	5.65	3.30	5.17	5.07	3.32
(R8-R7)/(R8+R7)	8.69	10.19	6.81	11.37	13.88	3.54
							R4/f	3.18	5.96	3.34	3.40	3.40	4.39
f1/(R1+R2)	-1.16	-0.94	-1.05	-1.16	-1.20	-0.82
							V5	19.2	19.2	19.2	19.2	19.2	19.2
f45/f	0.94	1.46	1.19	0.90	0.91	1.23

Table 13 table 14 gives effective focal lengths f of the image pickup lens groups of example one to example six, and effective focal lengths f1 to f5 of the respective lenses.

Example parameters	1	2	3	4	5	6
							f(mm)	1.09	1.03	1.04	1.10	1.10	0.79
f1(mm)	-2.03	-1.57	-1.78	-2.05	-2.12	-1.34
							f2(mm)	-6.52	-59.01	-6.52	-8.53	-8.52	-6.52
f3(mm)	-101.10	3.68	3.87	-100.00	-17.45	8.66
							f4(mm)	0.92	0.98	0.96	0.84	0.85	1.03
f5(mm)	-2.27	-1.57	-2.08	-1.28	-1.30	100.00
							TTL(mm)	4.68	4.72	4.39	4.51	4.50	4.08
ImgH(mm)	1.32	1.32	1.32	1.32	1.32	1.32
							Semi-FOV(°)	83.2	84.6	83.5	82.9	82.9	85.1
SAG51(mm)	-0.15	-0.51	-0.14	-0.34	-0.32	-0.10

TABLE 14

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 group.

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 image capturing lens group comprising, in order from an object side to an image side:

a first lens having a negative refractive power;

a second lens having negative refractive power, an object side surface of the second lens being convex;

a third lens element having a refractive power, an image side surface of the third lens element being concave;

a fourth lens having refractive power;

a fifth lens having refractive power;

wherein a half of a Semi-FOV of a maximum field angle of the image pickup lens group satisfies: Semi-FOV > 80.

2. The imaging lens group according to claim 1, wherein a central thickness CT4 of the fourth lens on an optical axis and an edge thickness ET4 of the fourth lens satisfy: 3.5 < CT4/ET4 < 5.0.

3. The imaging lens group according to claim 1, characterized in that an effective focal length f of the imaging lens group and an entrance pupil diameter EPD of the imaging lens group satisfy: f/EPD < 2.6.

4. The imaging lens group according to claim 1, wherein an on-axis distance TTL from an object side surface to an imaging surface of the first lens and an air interval T12 on an optical axis between the first lens and the second lens satisfy: 4.0 < TTL/T12 < 5.0.

5. The imaging lens group according to claim 1, wherein an edge thickness ET5 of the fifth lens and a center thickness CT5 of the fifth lens on an optical axis satisfy: 1.5 < ET5/CT5 < 2.5.

6. The imaging lens group according to claim 1, wherein an on-axis distance SAG51 between an edge thickness ET5 of the fifth lens and an on-axis distance between an intersection point of an object side surface of the fifth lens and an optical axis and an effective radius vertex of the object side surface of the fifth lens satisfies: 6.5 < ET5/SAG51 < -1.5.

7. The imaging lens group according to claim 1, wherein an on-axis distance SAG42 between a central thickness CT4 of the fourth lens on an optical axis and an intersection point of an image side surface of the fourth lens and the optical axis to an effective radius vertex of the image side surface of the fourth lens satisfies: 2.5 < CT4/SAG42 < -1.5.

8. The imaging lens group according to claim 1, wherein a central thickness CT3 of said third lens on an optical axis and a central thickness CT2 of said second lens on an optical axis satisfy: 1.0 < CT3/CT2 < 2.0.

9. The imaging lens group according to claim 1, wherein an air interval T12 of said first lens and said second lens on an optical axis, a central thickness CT1 of said first lens on the optical axis satisfy: T12/CT1 is more than 3.0 and less than 6.0.

10. The imaging lens group according to claim 1, wherein a radius of curvature R7 of an object-side surface of the fourth lens and a radius of curvature R8 of an image-side surface of the fourth lens satisfy: 3.5 < (R8-R7)/(R8+ R7) < 14.0.

11. An image capturing lens group according to claim 1, wherein a radius of curvature R4 of the image side surface of the second lens and an effective focal length f of the image capturing lens group satisfy: r4/f is more than 3.0 and less than 6.0.

12. The imaging lens group according to claim 1, wherein an abbe number V5 of said fifth lens satisfies: v5 < 20.0.

13. The imaging lens group according to claim 1, wherein an effective focal length f1 of the first lens, a radius of curvature R1 of a surface of the first lens facing a light-entering side, and a radius of curvature R2 of a surface of the first lens facing a light-exiting side satisfy: -1.5 < f1/(R1+ R2) < -0.6.

14. An imaging lens group comprising, in order from an object side to an image side:

a first lens having a negative refractive power;

a fourth lens having refractive power;

a fifth lens having refractive power;

wherein a half of a Semi-FOV of a maximum field angle of the image pickup lens group satisfies: Semi-FOV > 80 °;

the combined focal length f45 of the fourth lens and the fifth lens and the effective focal length f of the image pickup lens group satisfy that: f45/f is more than 0.5 and less than 1.5.

15. The imaging lens group of claim 14, wherein the fourth lens has a center thickness CT4 on an optical axis and an edge thickness ET4 that satisfy: 3.5 < CT4/ET4 < 5.0.

16. The imaging lens group according to claim 14, characterized in that an effective focal length f of the imaging lens group and an entrance pupil diameter EPD of the imaging lens group satisfy: f/EPD < 2.6.

17. The imaging lens group according to claim 14, wherein an on-axis distance TTL from an object side surface to an imaging surface of the first lens and an air interval T12 on an optical axis between the first lens and the second lens satisfy: 4.0 < TTL/T12 < 5.0.

18. The imaging lens group of claim 14, wherein an edge thickness ET5 of the fifth lens and a central thickness CT5 of the fifth lens on an optical axis satisfy: 1.5 < ET5/CT5 < 2.5.

19. The imaging lens group of claim 14, wherein an on-axis distance SAG51 between an edge thickness ET5 of the fifth lens and an intersection point of an object-side surface and an optical axis of the fifth lens to an effective radius vertex of the object-side surface of the fifth lens satisfies: 6.5 < ET5/SAG51 < -1.5.

20. The imaging lens group of claim 14, wherein an on-axis distance SAG42 between a central thickness CT4 of the fourth lens on an optical axis and an intersection point of an image side surface of the fourth lens and the optical axis to an effective radius vertex of the image side surface of the fourth lens satisfies: 2.5 < CT4/SAG42 < -1.5.

21. The imaging lens group of claim 14, wherein a central thickness CT3 of the third lens on an optical axis and a central thickness CT2 of the second lens on the optical axis satisfy: 1.0 < CT3/CT2 < 2.0.

22. The imaging lens group according to claim 14, wherein an air interval T12 of the first lens and the second lens on an optical axis, a central thickness CT1 of the first lens on the optical axis satisfies: 3.0 < T12/CT1 < 6.0.

23. The imaging lens group according to claim 14, wherein a radius of curvature R7 of an object-side surface of the fourth lens and a radius of curvature R8 of an image-side surface of the fourth lens satisfy: 3.5 < (R8-R7)/(R8+ R7) < 14.0.

24. The imaging lens group according to claim 14, wherein a radius of curvature R4 of an image side surface of the second lens and an effective focal length f of the imaging lens group satisfy: r4/f is more than 3.0 and less than 6.0.

25. The imaging lens group according to claim 14, wherein an abbe number V5 of said fifth lens satisfies: v5 < 20.0.

26. The imaging lens group according to claim 14 wherein an effective focal length f1 of the first lens, a radius of curvature R1 of a surface of the first lens facing the light-entering side, and a radius of curvature R2 of a surface of the first lens facing the light-exiting side satisfy: -1.5 < f1/(R1+ R2) < -0.6.