CN114114639B

CN114114639B - Photographic lens group

Info

Publication number: CN114114639B
Application number: CN202111565074.6A
Authority: CN
Inventors: 张晓彬; 闻人建科; 戴付建; 赵烈烽
Original assignee: Zhejiang Sunny Optics Co Ltd
Current assignee: Zhejiang Sunny Optics Co Ltd
Priority date: 2021-12-20
Filing date: 2021-12-20
Publication date: 2024-02-20
Anticipated expiration: 2041-12-20
Also published as: CN117518412A; CN114114639A

Abstract

The invention provides a photographic lens group, which sequentially comprises the following components from the light incident side of the photographic lens group to the light emergent side of the photographic lens group: the first lens has positive refractive power, the surface of the first lens close to the light incident side is a convex surface, and the surface of the first lens close to the light emergent side is a concave surface; the second lens has positive refractive power, and the surface of the second lens close to the light incident side is a convex surface; the third lens has negative refractive power, and the surface of the third lens close to the light emergent side is a concave surface; the fourth lens has positive refractive power, and the surface of the fourth lens close to the light incident side is a convex surface; the fifth lens has negative refractive power, the surface of the fifth lens close to the light incident side is a convex surface, and the surface of the fifth lens close to the light emergent side is a concave surface; wherein, the effective focal length f of the photographic lens group and the maximum field angle FOV of the photographic lens group satisfy the following conditions: 12mm < f/tan (FOV) <17mm. The invention solves the problem that miniaturization and high image quality of the lens cannot be achieved in the prior art.

Description

Photographic lens group

Technical Field

The invention relates to the technical field of optical imaging equipment, in particular to a photographic lens group.

Background

With the continuous iteration of the mobile phone lens, the tele lens tends to be diversified, such as 2X/5X/10X. But 2X to 5X spans are relatively large and for some consumers, 3X tele lenses may be favored. The 3X lens is not easily assembled on the mobile terminal due to the height of the lens, so that miniaturization and high image quality of the lens cannot be simultaneously satisfied.

That is, the conventional lens has a problem that miniaturization and high image quality cannot be achieved.

Disclosure of Invention

The present invention provides a photographing lens assembly to solve the problem that the miniaturization and high image quality of the lens assembly cannot be achieved in the prior art.

In order to achieve the above object, according to one aspect of the present invention, there is provided a photographing lens assembly including, in order from an incident side of the photographing lens assembly to an exit side of the photographing lens assembly: the first lens has positive refractive power, the surface of the first lens close to the light incident side is a convex surface, and the surface of the first lens close to the light emergent side is a concave surface; the second lens has positive refractive power, and the surface of the second lens close to the light incident side is a convex surface; the third lens has negative refractive power, and the surface of the third lens close to the light emergent side is a concave surface; the fourth lens has positive refractive power, and the surface of the fourth lens close to the light incident side is a convex surface; the fifth lens has negative refractive power, the surface of the fifth lens close to the light incident side is a convex surface, and the surface of the fifth lens close to the light emergent side is a concave surface; wherein, the effective focal length f of the photographic lens group and the maximum field angle FOV of the photographic lens group satisfy the following conditions: 12mm < f/tan (FOV) <17mm.

Further, the effective focal length f1 of the first lens, the effective focal length f2 of the second lens, and the effective focal length f4 of the fourth lens satisfy: 0.6< (f2+f4)/f1 <1.6.

Further, the effective focal length f3 of the third lens and the effective focal length f5 of the fifth lens satisfy: 3.4< f5/f3<4.4.

Further, the curvature radius R1 of the surface of the first lens close to the light incident side and the curvature radius R2 of the surface of the first lens close to the light emergent side satisfy: 2.6< (R2+R1)/(R2-R1) <4.0.

Further, the curvature radius R3 of the surface of the second lens close to the light incident side and the curvature radius R6 of the surface of the third lens close to the light emergent side satisfy: 1.1< R3/R6<1.6.

Further, the curvature radius R9 of the surface of the fifth lens near the light entrance side and the curvature radius R10 of the surface of the fifth lens near the light exit side satisfy: 6.0< (R9+R10)/(R9-R10) <8.2.

Further, the maximum field angle FOV of the photographing lens group satisfies: 30 ° < FOV <45 °.

Further, the combined focal length f12 of the first lens and the second lens, the center thickness CT1 of the first lens, and the center thickness CT2 of the second lens satisfy: 2.2< f 12/(CT1+CT2) <2.9.

Further, the combined focal length f34 of the third lens and the fourth lens, the center thickness CT3 of the third lens, and the center thickness CT4 of the fourth lens satisfy: -14< f 34/(CT3+CT4) < -11.

Further, the combined focal length f1234 of the first lens, the second lens, the third lens and the fourth lens, and the on-axis distance BFL between the surface of the fifth lens close to the light-emitting side and the imaging surface of the photographing lens assembly satisfy: 1.5< f1234/BFL <2.0.

Further, the edge thickness ET3 of the third lens and the edge thickness ET2 of the second lens satisfy: 2.1< ET3/ET2<2.9.

Further, the air interval T45 between the fourth lens and the fifth lens on the optical axis of the photographing lens assembly, the edge thickness ET4 of the fourth lens, and the edge thickness ET5 of the fifth lens satisfy: 0.8< T45/(ET 4+ ET 5) <1.5.

According to another aspect of the present invention, there is provided a photographing lens assembly including, in order from an incident side of the photographing lens assembly to an exit side of the photographing lens assembly: the first lens has positive refractive power, the surface of the first lens close to the light incident side is a convex surface, and the surface of the first lens close to the light emergent side is a concave surface; the second lens has positive refractive power, and the surface of the second lens close to the light incident side is a convex surface; the third lens has negative refractive power, and the surface of the third lens close to the light emergent side is a concave surface; the fourth lens has positive refractive power, and the surface of the fourth lens close to the light incident side is a convex surface; the fifth lens has negative refractive power, the surface of the fifth lens close to the light incident side is a convex surface, and the surface of the fifth lens close to the light emergent side is a concave surface; the combined focal length f34 of the third lens and the fourth lens, the center thickness CT3 of the third lens and the center thickness CT4 of the fourth lens satisfy: -14< f 34/(CT3+CT4) < -11.

By applying the technical scheme of the invention, the lens assembly comprises a first lens, a second lens, a third lens, a fourth lens and a fifth lens in sequence from the light incident side of the photographing lens assembly to the light emergent side of the photographing lens assembly, wherein the first lens has positive refractive power, the surface of the first lens close to the light incident side is a convex surface, and the surface of the first lens close to the light emergent side is a concave surface; the second lens has positive refractive power, and the surface of the second lens close to the light incident side is a convex surface; the third lens has negative refractive power, and the surface of the third lens close to the light emergent side is a concave surface; the fourth lens element with positive refractive power has a convex surface adjacent to the light-incident side; the fifth lens has negative refractive power, the surface of the fifth lens close to the light incident side is a convex surface, and the surface of the fifth lens close to the light emergent side is a concave surface; wherein, the effective focal length f of the photographic lens group and the maximum field angle FOV of the photographic lens group satisfy the following conditions: 12mm < f/tan (FOV) <17mm.

By arranging both the first lens and the second lens with positive refractive power, the photographing lens assembly is beneficial to converging incident light rays, and imaging light rays can enter the following lens. The third lens element with negative refractive power is favorable for correcting chromatic aberration of the photographing lens assembly, and can raise light rays and reduce vignetting so that more light rays can enter the photographing lens assembly, and the imaging function of the photographing lens assembly is ensured. The fourth lens element with positive refractive power and the fifth lens element with negative refractive power can converge light rays and reduce aberration. The surface of the fifth lens close to the light incident side is a convex surface, and the surface of the fifth lens close to the light emergent side is a concave surface, so that the risk of ghost images can be reduced. And f/tan (FOV) is controlled in a reasonable range, which is helpful for reasonably setting the effective focal length and the view angle of the photographic lens group, is beneficial for the compression size of the photographic lens group, and also makes the light deflection small.

Drawings

The accompanying drawings, which 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. In the drawings:

Fig. 1 is a schematic view showing a configuration of a photographing lens assembly according to an example one of the present invention;

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

fig. 6 is a schematic view showing a configuration of a photographing lens assembly according to example two of the present invention;

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

fig. 11 shows a schematic configuration diagram of a photographic lens group of example three of the present invention;

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

fig. 16 is a schematic view showing the structure of a photographic lens group of example four of the present invention;

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

fig. 21 is a schematic view showing the structure of a photographic lens group of example five of the present invention;

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

Wherein the above figures include the following reference numerals:

STO and diaphragm; e1, a first lens; s1, a surface of a first lens, which is close to a light incident side, is provided; s2, the surface of the first lens close to the light emitting side; e2, a second lens; s3, the surface of the second lens close to the light incident side; s4, the surface of the second lens close to the light emitting side; e3, a third lens; s5, the surface of the third lens close to the light incident side; s6, the surface of the third lens close to the light emitting side; e4, a fourth lens; s7, the surface of the fourth lens close to the light incident side; s8, the surface of the fourth lens close to the light emitting side; e5, a fifth lens; s9, the surface of the fifth lens close to the light incident side; s10, the surface of the fifth lens close to the light emitting side; e6, a filter; s11, the surface of the filter close to the light incident side; s12, the surface of the filter close to the light emitting side; s13, an imaging surface.

Detailed Description

It should be noted that, in the case of no conflict, the embodiments and features in the embodiments may be combined with each other. The invention will be described in detail below with reference to the drawings in connection with embodiments.

It is noted that 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 unless otherwise indicated.

In the present invention, unless otherwise indicated, terms of orientation such as "upper, lower, top, bottom" are used generally with respect to the orientation shown in the drawings or with respect to the component itself in the vertical, upright or gravitational direction; also, for ease of understanding and description, "inner and outer" refers to inner and outer relative to the profile of each component itself, but the above-mentioned orientation terms are not intended to limit the present invention.

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

In the drawings, the thickness, size, and shape of the lenses have been slightly exaggerated for convenience of explanation. Specifically, the spherical or aspherical shape shown in the drawings is shown by way of example. That is, the shape of the spherical or aspherical surface is not limited to the shape of the spherical or aspherical surface shown in the drawings. The figures are merely examples and are not drawn to scale.

Herein, the paraxial region refers to a region near the optical axis. If the lens surface is convex and the convex position is not defined, then the lens surface is convex at least in the paraxial region; if the lens surface is concave and the concave position is not defined, it means that the lens surface is concave at least in the paraxial region. The surface of each lens close to the object side becomes the surface of the lens close to the light entrance side, and the surface of each lens close to the image side is referred to as the surface of the lens close to the light exit side. The determination of the surface shape in the paraxial region can be performed by a determination method by a person skilled in the art by positive or negative determination of the concave-convex with R value (R means the radius of curvature of the paraxial region, and generally means the R value on a lens database (lens data) in optical software). In the object side surface, 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; in the image side, the concave surface is determined when the R value is positive, and the convex surface is determined when the R value is negative.

In order to solve the problem that miniaturization and high image quality cannot be achieved in the prior art, the invention provides a photographic lens group.

Example 1

As shown in fig. 1 to 25, the lens assembly includes, in order from the light incident side of the photographing lens assembly to the light emergent side of the photographing lens assembly, a first lens having positive refractive power, a second lens having a convex surface near the light incident side and a concave surface near the light emergent side, a third lens, a fourth lens, and a fifth lens; the second lens has positive refractive power, and the surface of the second lens close to the light incident side is a convex surface; the third lens has negative refractive power, and the surface of the third lens close to the light emergent side is a concave surface; the fourth lens element with positive refractive power has a convex surface adjacent to the light-incident side; the fifth lens has negative refractive power, the surface of the fifth lens close to the light incident side is a convex surface, and the surface of the fifth lens close to the light emergent side is a concave surface; wherein, the effective focal length f of the photographic lens group and the maximum field angle FOV of the photographic lens group satisfy the following conditions: 12mm < f/tan (FOV) <17mm.

Preferably, the effective focal length f of the photographing lens group and the maximum field angle FOV of the photographing lens group satisfy: 14mm < f/tan (FOV) <16mm.

In the present embodiment, the effective focal length f1 of the first lens, the effective focal length f2 of the second lens, and the effective focal length f4 of the fourth lens satisfy: 0.6< (f2+f4)/f1 <1.6. The focal length of the photographic lens group is reasonably controlled, the refractive power distribution of the photographic lens group can be controlled, and on one hand, the aberration correction of the photographic lens group is facilitated; on the other hand, the shape of the lenses at different positions can be controlled, so that the ghost image optimization of the photographic lens group is facilitated. Preferably 0.7< (f2+f4)/f1 <1.4.

In the present embodiment, the effective focal length f3 of the third lens and the effective focal length f5 of the fifth lens satisfy: 3.4< f5/f3<4.4. The focal length ranges of the third lens and the fifth lens are controlled, so that the trend of light rays can be controlled, and the optical photographic lens group can be better matched with a chip. Preferably 3.5< f5/f3<4.3.

In the present embodiment, the curvature radius R1 of the surface of the first lens near the light entrance side and the curvature radius R2 of the surface of the first lens near the light exit side satisfy: 2.6< (R2+R1)/(R2-R1) <4.0. The surface of the first lens close to the light incident side and the surface of the first lens close to the light emergent side are reasonably controlled, so that on one hand, the situation that the aberration is too large and the later correction is not good due to too large refractive power can be avoided; on the other hand, too little refractive power can be avoided, resulting in insufficient convergence of the lens, to ensure the imaging quality of the photographing lens assembly. Preferably, 2.7< (R2+R1)/(R2-R1) <3.9.

In the present embodiment, the curvature radius R3 of the surface of the second lens near the light entrance side and the curvature radius R6 of the surface of the third lens near the light exit side satisfy: 1.1< R3/R6<1.6. By controlling the curvature radius of the surface of the second lens close to the light incident side and the curvature radius of the surface of the third lens close to the light emergent side, the curvature directions of the two surfaces can be ensured to be consistent, and thus the second lens and the third lens can be approximated to form a double-cemented lens, which is beneficial to chromatic aberration correction of the photographic lens group. Preferably 1.2< R3/R6<1.5.

In the present embodiment, the curvature radius R9 of the surface of the fifth lens near the light-entering side and the curvature radius R10 of the surface of the fifth lens near the light-exiting side satisfy: 6.0< (R9+R10)/(R9-R10) <8.2. By controlling the radius of curvature of the surface of the fifth lens close to the light incident side and the surface of the fifth lens close to the light emergent side, chip ghost images caused by chip reflection can be avoided. Meanwhile, the direction of the emergent light of the optical photographing lens assembly can be properly controlled, and the CRA matching of the photographing lens assembly is facilitated. Preferably, 6.1< (R9+R10)/(R9-R10) <8.1.

In the present embodiment, the maximum field angle FOV of the photographing lens group satisfies: 30 ° < FOV <45 °. By controlling the field angle of the photographic lens group, the equivalent focal length of the photographic lens group can be ensured, the concept of long focus of the photographic lens group is satisfied, and the requirement of consumers for shooting distant objects is satisfied. Preferably, 33 ° < FOV <40 °.

In the present embodiment, the combined focal length f12 of the first lens and the second lens, the center thickness CT1 of the first lens, and the center thickness CT2 of the second lens satisfy: 2.2< f 12/(CT1+CT2) <2.9. The above conditions give consideration to the focal length of the lens and the thickness of the lens in the photographing lens group, on one hand, ensure the center thickness of the lens, and on the other hand, ensure that the lens cannot be bent too much, which are both beneficial to the molding of the lens. Preferably, 2.3< f 12/(CT 1+ CT 2) <2.8.

In the present embodiment, the combined focal length f34 of the third lens and the fourth lens, the center thickness CT3 of the third lens, and the center thickness CT4 of the fourth lens satisfy: -14< f 34/(CT3+CT4) < -11. The third lens element and the fourth lens element have different refractive powers, and the chromatic aberration correction can be facilitated by controlling the synthetic focal length of the third lens element and the fourth lens element; and the center thickness of the third lens and the center thickness of the fourth lens are controlled, so that the formability of the lenses can be ensured. Preferably, -13.5< f 34/(CT3+CT4) < -11.1.

In the present embodiment, the combined focal length f1234 of the first, second, third, and fourth lenses, and the on-axis distance BFL between the surface of the fifth lens close to the light-emitting side and the imaging surface of the photographing lens group satisfy: 1.5< f1234/BFL <2.0. The incidence height of light to the last lens can be restrained by controlling the synthesized focal length of the front four lenses, so that the height of the lens barrel is controlled, and the miniaturization of the lens barrel is facilitated; the telescopic length of the photographing lens assembly is controlled by controlling the axial distance from the surface of the fifth lens close to the light emitting side to the imaging surface, so that the motor stroke can be matched. Preferably, 1.6< f1234/BFL <1.9.

In the present embodiment, the edge thickness ET3 of the third lens and the edge thickness ET2 of the second lens satisfy: 2.1< ET3/ET2<2.9. The edge thickness of the two lenses is controlled, so that the lens forming is facilitated; on the other hand, the thickness of the two lens edges is within a certain range, and the stacking and arrangement of the lenses are facilitated in consideration of the height of light rays. Preferably, 2.2< ET3/ET2<2.85.

In the present embodiment, the air interval T45 between the fourth lens and the fifth lens on the optical axis of the photographing lens assembly, the edge thickness ET4 of the fourth lens, and the edge thickness ET5 of the fifth lens satisfy: 0.8< T45/(ET 4+ ET 5) <1.5. By controlling the thickness and the air interval of the fourth lens and the fifth lens, on one hand, the thick spacer ring between the two lenses can be avoided, so that stray light caused by the thick spacer ring is avoided; on the other hand, the molding process and the assembling process of the fourth lens and the fifth lens can be ensured, which is beneficial to the reliability of the photographic lens group. Preferably, 0.9< T45/(ET 4+ ET 5) <1.4.

Example two

As shown in fig. 1 to 25, the imaging lens group includes, in order from an incident side to an exit side of the imaging lens group: the lens system comprises a first lens, a second lens, a third lens, a fourth lens and a fifth lens, wherein the first lens has positive refractive power, the surface of the first lens close to the light incident side is a convex surface, and the surface of the first lens close to the light emergent side is a concave surface; the second lens has positive refractive power, and the surface of the second lens close to the light incident side is a convex surface; the third lens has negative refractive power, and the surface of the third lens close to the light emergent side is a concave surface; the fourth lens element with positive refractive power has a convex surface adjacent to the light-incident side; the fifth lens has negative refractive power, the surface of the fifth lens close to the light incident side is a convex surface, and the surface of the fifth lens close to the light emergent side is a concave surface; the combined focal length f34 of the third lens and the fourth lens, the center thickness CT3 of the third lens and the center thickness CT4 of the fourth lens satisfy: -14< f 34/(CT3+CT4) < -11.

By arranging both the first lens and the second lens with positive refractive power, the photographing lens assembly is beneficial to converging incident light rays, and imaging light rays can enter the following lens. The third lens element with negative refractive power is favorable for correcting chromatic aberration of the photographing lens assembly, and can raise light rays and reduce vignetting so that more light rays can enter the photographing lens assembly, and the imaging function of the photographing lens assembly is ensured. The fourth lens element with positive refractive power and the fifth lens element with negative refractive power can converge light rays and reduce aberration. The surface of the fifth lens close to the light incident side is a convex surface, and the surface of the fifth lens close to the light emergent side is a concave surface, so that the risk of ghost images can be reduced. The third lens element and the fourth lens element have different refractive powers, and the chromatic aberration correction can be facilitated by controlling the synthetic focal length of the third lens element and the fourth lens element; and the center thickness of the third lens and the center thickness of the fourth lens are controlled, so that the formability of the lenses can be ensured.

Preferably, the combined focal length f34 of the third lens and the fourth lens, the center thickness CT3 of the third lens, and the center thickness CT4 of the fourth lens satisfy: -13.5< f 34/(CT3+CT4) < -11.1.

Optionally, the photographing lens assembly may further include a filter for correcting color deviation and/or a protective glass for protecting a photosensitive element located on the imaging surface.

The photographing lens assembly in the present application may employ a plurality of lenses, for example, five lenses as described above. By reasonably distributing the refractive power, the surface shape, the center thickness of each lens, the axial distance between each lens and the like of each lens, the aperture of the photographic lens group can be effectively increased, the sensitivity of the lens is reduced, and the processability of the lens is improved, so that the photographic lens group is more beneficial to production and processing and can be suitable for portable electronic equipment such as smart phones and the like.

In the present application, at least one of the mirrors of each lens is an aspherical mirror. The aspherical 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 radius of curvature characteristic, and has advantages of improving distortion aberration and improving astigmatic aberration. By adopting the aspherical lens, aberration occurring at the time of imaging can be eliminated as much as possible, thereby improving imaging quality.

However, it will be appreciated by those skilled in the art that the number of lenses making up the photographing lens assembly can be varied to achieve the various results and advantages described in this specification without departing from the technical solutions claimed herein. For example, although the description has been made by taking five lenses as an example in the embodiment, the photographing lens group is not limited to include five lenses. The photographing lens assembly may further include other numbers of lenses, if desired.

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

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

Example one

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

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

The first lens element E1 with positive refractive power has a convex surface S1 on a light incident side and a concave surface S2 on a light emergent side. The second lens element E2 with positive refractive power has a convex surface S3 on the light-incident side and a convex surface S4 on the light-exiting side. The third lens element E3 with negative refractive power has a concave surface on a surface S5 of the third lens element near the light-incident side and a concave surface on a surface S6 of the third lens element near the light-exiting side. The fourth lens element E4 with positive refractive power has a convex surface S7 on the light-incident side and a convex surface S8 on the light-exiting side. The fifth lens element E5 with negative refractive power has a convex surface S9 on the light-incident side and a concave surface S10 on the light-exiting side. The filter E6 has a surface S11 of the filter close to the light entrance side and a surface S12 of the filter close to the light exit side. 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 photographing lens group is 10.57mm, the total length TTL of the photographing lens group is 10.40mm, and the image height ImgH is 3.47mm.

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

TABLE 1

In the first example, the surface of any one of the first lens E1 to the fifth lens E5 near the light incident side and the surface near the light emergent side are both aspheric, and the surface shape of each aspheric lens can be defined by, but not limited to, the following aspheric equation:

wherein x is the distance vector height from the vertex of the aspheric surface when the aspheric surface is at the position with the height h along the optical axis direction; c is the paraxial curvature of the aspheric surface, c=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 aspherical i-th order. The following Table 2 shows the higher order coefficients A4, A6, A8, A10, A12, A14, A16, A18, A20, A22, A24, A26 that can be used for each of the aspherical mirrors S1-S10 in example one.

Face number

A4

A6

A8

A10

A12

A14

S1

-3.6386E-03

-5.5363E-03

3.3812E-03

-1.5544E-03

5.1373E-04

-1.1720E-04

S2

1.8077E-03

-3.2639E-02

3.0957E-02

-1.5546E-02

5.0052E-03

-1.0826E-03

S3

8.4306E-03

-3.1494E-02

3.1555E-02

-1.6232E-02

5.3493E-03

-1.1964E-03

S4

1.5429E-02

-1.7881E-02

1.5124E-02

-8.1896E-03

2.7992E-03

-6.2477E-04

S5

-1.9069E-02

3.1277E-02

-2.6110E-02

1.5306E-02

-6.4978E-03

1.9604E-03

S6

-6.9917E-02

8.5682E-02

-8.7866E-02

7.3737E-02

-4.9551E-02

2.5850E-02

S7

-4.3933E-02

2.6050E-02

-1.0052E-02

-1.8919E-03

5.3765E-03

-3.5084E-03

S8

-3.1780E-02

2.0911E-02

-1.0908E-02

3.9509E-03

-7.9946E-04

-1.8100E-06

S9

-1.5268E-01

2.2363E-02

2.9554E-02

-4.9563E-02

4.6832E-02

-3.1174E-02

S10

-1.5162E-01

4.9795E-02

-6.5310E-03

-5.7302E-03

4.7046E-03

-1.8338E-03

Face number

A16

A18

A20

A22

A24

A26

S1

1.8465E-05

-1.9453E-06

1.2215E-07

-3.4020E-09

0.0000E+00

S2

1.5751E-04

-1.4834E-05

8.1596E-07

-1.9829E-08

0.0000E+00

S3

1.8225E-04

-1.8312E-05

1.1182E-06

-3.3809E-08

2.1325E-10

0.0000E+00

S4

9.2435E-05

-8.8158E-06

4.9136E-07

-1.2146E-08

0.0000E+00

S5

-4.0149E-04

5.2468E-05

-3.9317E-06

1.2853E-07

0.0000E+00

S6

-9.9577E-03

2.6911E-03

-4.7749E-04

4.9574E-05

-2.2707E-06

0.0000E+00

S7

1.2678E-03

-2.7078E-04

3.1914E-05

-1.6037E-06

0.0000E+00

S8

5.1153E-05

-1.4288E-05

1.7648E-06

-8.8615E-08

0.0000E+00

S9

1.4596E-02

-4.6548E-03

9.5706E-04

-1.1401E-04

5.9674E-06

0.0000E+00

S10

4.3177E-04

-6.1760E-05

4.9107E-06

-1.6487E-07

0.0000E+00

TABLE 2

Fig. 2 shows an on-axis chromatic aberration curve of the photographing lens assembly of example one, which indicates the deviation of the converging focus of light rays of different wavelengths after passing through the photographing lens assembly. Fig. 3 shows an astigmatism curve of the photographing lens group of example one, which represents meridional image surface curvature and sagittal image surface curvature. Fig. 4 shows distortion curves of the photographing lens group of example one, which represent distortion magnitude values corresponding to different angles of view. Fig. 5 shows a magnification chromatic aberration curve of the photographing lens assembly of example one, which shows the deviation of different image heights on the imaging plane after the light passes through the photographing lens assembly.

As can be seen from fig. 2 to 5, the photographing lens assembly of example one can achieve good imaging quality.

Example two

As shown in fig. 6 to 10, a photographing lens group of example two of the present application is described. In this example and the following examples, a description of portions similar to those of example one will be omitted for the sake of brevity. Fig. 6 shows a schematic diagram of a photographic lens group structure of example two.

As shown in fig. 6, the photographing lens assembly includes, in order from a light incident side to a light emergent side, a stop STO, a first lens E1, a second lens E2, a third lens E3, a fourth lens E4, a fifth lens E5, a filter E6, and an imaging surface S13.

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

Table 3 shows a basic structural parameter table of a photographing lens group of example two, in which the units of radius of curvature, thickness/distance, focal length, and effective radius are all millimeters (mm).

TABLE 3 Table 3

Table 4 shows the higher order coefficients that can be used for each of the aspherical mirror surfaces in example two, where each of the aspherical surface types can be defined by equation (1) given in example one above.

Face number

A4

A6

A8

A10

A12

A14

S1

-2.9231E-03

-2.1665E-03

9.4061E-04

-7.7604E-04

4.0330E-04

-1.1565E-04

S2

-4.2220E-03

-1.4417E-02

9.4149E-03

-2.4691E-03

2.6178E-04

2.7834E-05

S3

5.1789E-04

-1.4985E-02

9.4948E-03

-1.7734E-03

-1.5623E-05

-2.7166E-06

S4

1.2511E-02

-2.1278E-02

1.5807E-02

-4.7070E-03

-3.8833E-04

6.8620E-04

S5

-2.7805E-02

3.9923E-02

-2.6959E-02

1.3456E-02

-5.3270E-03

1.5669E-03

S6

-7.8017E-02

9.5066E-02

-8.7035E-02

7.1464E-02

-5.2268E-02

3.0551E-02

S7

-4.7791E-02

2.3330E-02

-5.2310E-03

-4.2310E-03

5.2704E-03

-2.8683E-03

S8

-3.1950E-02

1.6980E-02

-6.9440E-03

1.9169E-03

-3.1309E-04

3.6348E-05

S9

-1.3642E-01

1.6416E-02

1.5384E-02

-2.1666E-02

1.9255E-02

-1.3488E-02

S10

-1.3330E-01

3.2848E-02

2.1777E-03

-7.8289E-03

4.2724E-03

-1.2917E-03

Face number

A16

A18

A20

A22

A24

A26

S1

1.9831E-05

-2.0907E-06

1.2661E-07

-3.3828E-09

0.0000E+00

S2

-1.3717E-05

2.0166E-06

-1.4245E-07

4.0948E-09

0.0000E+00

S3

3.2173E-05

-1.1672E-05

1.9015E-06

-1.5444E-07

5.0724E-09

0.0000E+00

S4

-2.0835E-04

3.0807E-05

-2.3116E-06

7.0394E-08

0.0000E+00

S5

-3.0898E-04

3.7223E-05

-2.4188E-06

6.3164E-08

0.0000E+00

S6

-1.2950E-02

3.7563E-03

-7.0193E-04

7.5859E-05

-3.5927E-06

0.0000E+00

S7

9.4380E-04

-1.9034E-04

2.1483E-05

-1.0315E-06

0.0000E+00

S8

-1.2216E-05

4.5924E-06

-8.6059E-07

6.2830E-08

0.0000E+00

S9

6.8725E-03

-2.3691E-03

5.1736E-04

-6.4339E-05

3.4643E-06

0.0000E+00

S10

2.3071E-04

-2.2107E-05

7.4607E-07

1.8425E-08

0.0000E+00

TABLE 4 Table 4

Fig. 7 shows an on-axis chromatic aberration curve of the photographing lens assembly of example two, which indicates the deviation of the converging focus of light rays of different wavelengths after passing through the photographing lens assembly. Fig. 8 shows an astigmatism curve of the photographing lens group of example two, which represents meridional image surface curvature and sagittal image surface curvature. Fig. 9 shows distortion curves of the photographing lens group of example two, which represent distortion magnitude values corresponding to different angles of view. Fig. 10 shows a magnification chromatic aberration curve of the photographing lens assembly of example two, which shows the deviation of different image heights on the imaging plane after the light passes through the photographing lens assembly.

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

Example three

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

As shown in fig. 11, the photographing lens assembly includes, in order from the light incident side to the light emergent side, a stop STO, a first lens E1, a second lens E2, a third lens E3, a fourth lens E4, a fifth lens E5, a filter E6, and an imaging surface S13.

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

Table 5 shows a basic structural parameter table of a photographing lens group of example three, in which the units of radius of curvature, thickness/distance, focal length, and effective radius are all millimeters (mm).

TABLE 5

Table 6 shows the higher order coefficients that can be used for each of the aspherical mirror surfaces in example three, where each of the aspherical surface types can be defined by the formula (1) given in example one above.

TABLE 6

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

As can be seen from fig. 12 to 15, the photographing lens assembly of example three can achieve good imaging quality.

Example four

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

As shown in fig. 16, the photographing lens assembly includes, in order from the light incident side to the light emergent side, a stop STO, a first lens E1, a second lens E2, a third lens E3, a fourth lens E4, a fifth lens E5, a filter E6, and an imaging surface S13.

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

Table 7 shows a basic structural parameter table of a photographing lens group of example four, in which the units of radius of curvature, thickness/distance, focal length, and effective radius are all millimeters (mm).

TABLE 7

Table 8 shows the higher order coefficients that can be used for each of the aspherical mirror surfaces in example four, where each of the aspherical surface types can be defined by the formula (1) given in example one above.

Face number

A4

A6

A8

A10

A12

A14

S1

-3.9179E-03

-2.2515E-03

2.3663E-04

-1.0443E-04

1.6504E-04

-7.1416E-05

S2

2.3820E-03

-2.8237E-02

1.9693E-02

-6.5633E-03

1.2932E-03

-1.4494E-04

S3

8.2991E-03

-2.5946E-02

1.2910E-02

1.7047E-03

-3.9036E-03

1.8412E-03

S4

3.7354E-02

-7.6121E-02

7.9456E-02

-4.9807E-02

2.0024E-02

-5.3058E-03

S5

-2.0463E-02

9.2400E-03

1.5254E-02

-2.0111E-02

1.1226E-02

-3.6267E-03

S6

-7.5705E-02

9.7188E-02

-8.5820E-02

6.3462E-02

-4.1893E-02

2.2916E-02

S7

-4.5445E-02

2.8634E-02

-1.3064E-02

3.5444E-03

-2.3398E-04

-1.7380E-04

S8

-4.4769E-02

3.1228E-02

-1.7218E-02

8.0273E-03

-3.3224E-03

1.2178E-03

S9

-1.5240E-01

3.0367E-02

2.1150E-03

-3.7577E-03

-1.1436E-03

2.2164E-03

S10

-1.4589E-01

4.3557E-02

-1.2760E-03

-9.0329E-03

6.1708E-03

-2.2830E-03

Face number

A16

A18

A20

A22

A24

A26

S1

1.4954E-05

-1.7492E-06

1.1154E-07

-3.0561E-09

0.0000E+00

S2

4.6837E-06

9.5389E-07

-1.2442E-07

4.7049E-09

0.0000E+00

S3

-4.9139E-04

8.3379E-05

-8.9732E-06

5.6286E-07

-1.5769E-08

0.0000E+00

S4

9.2331E-04

-1.0148E-04

6.3765E-06

-1.7428E-07

0.0000E+00

S5

7.2423E-04

-8.8299E-05

6.0225E-06

-1.7574E-07

0.0000E+00

S6

-9.2640E-03

2.5685E-03

-4.5733E-04

4.6930E-05

-2.1039E-06

0.0000E+00

S7

6.6445E-05

-1.1083E-05

8.2541E-07

-1.1441E-08

0.0000E+00

S8

-3.5166E-04

6.9616E-05

-8.1949E-06

4.3024E-07

0.0000E+00

S9

-1.1000E-03

2.7606E-04

-3.5462E-05

1.7405E-06

2.0299E-08

0.0000E+00

S10

5.2583E-04

-7.4924E-05

6.0493E-06

-2.1170E-07

0.0000E+00

TABLE 8

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

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

Example five

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

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

The first lens element E1 with positive refractive power has a convex surface S1 on a light incident side and a concave surface S2 on a light emergent side. The second lens element E2 with positive refractive power has a convex surface on a surface S3 of the second lens element adjacent to the light incident side and a concave surface on a surface S4 of the second lens element adjacent to the light emergent side. The third lens element E3 with negative refractive power has a convex surface S5 and a concave surface S6. The fourth lens element E4 with positive refractive power has a convex surface S7 on the light-incident side and a concave surface S8 on the light-exiting side. The fifth lens element E5 with negative refractive power has a convex surface S9 on the light-incident side and a concave surface S10 on the light-exiting side. The filter E6 has a surface S11 of the filter close to the light entrance side and a surface S12 of the filter close to the light exit side. 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 photographing lens group is 10.57mm, the total length TTL of the photographing lens group is 10.39mm, and the image height ImgH is 3.47mm.

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

TABLE 9

Table 10 shows the higher order coefficients that can be used for each of the aspherical mirror surfaces in example five, where each of the aspherical surface types can be defined by equation (1) given in example one above.

Face number

A4

A6

A8

A10

A12

A14

S1

-3.7301E-03

-2.1123E-03

3.4979E-04

-4.8489E-04

4.4190E-04

-1.7184E-04

S2

7.3106E-03

-4.0318E-02

2.9955E-02

-1.1398E-02

2.8080E-03

-4.8194E-04

S3

1.3122E-02

-3.7834E-02

2.2186E-02

-1.9376E-03

-3.0847E-03

1.7340E-03

S4

3.1254E-02

-6.1401E-02

6.0949E-02

-3.6639E-02

1.4302E-02

-3.7265E-03

S5

-2.7805E-02

2.7817E-02

-7.6325E-03

-3.6695E-03

3.8645E-03

-1.5111E-03

S6

-7.8702E-02

1.0448E-01

-9.4200E-02

6.8687E-02

-4.3303E-02

2.2574E-02

S7

-4.3812E-02

2.7062E-02

-1.1322E-02

1.6470E-03

1.2743E-03

-9.5987E-04

S8

-4.3061E-02

3.0430E-02

-1.6997E-02

8.2578E-03

-3.6417E-03

1.4312E-03

S9

-1.5996E-01

2.8875E-02

6.0812E-03

-7.2438E-03

7.2588E-04

1.5753E-03

S10

-1.5184E-01

4.3847E-02

1.5173E-03

-1.1784E-02

7.6791E-03

-2.8250E-03

Face number

A16

A18

A20

A22

A24

A26

S1

3.5831E-05

-4.2872E-06

2.8026E-07

-7.8127E-09

0.0000E+00

S2

5.7351E-05

-4.4873E-06

2.0589E-07

-4.1611E-09

0.0000E+00

S3

-4.8289E-04

8.2566E-05

-8.8258E-06

5.4626E-07

-1.5060E-08

0.0000E+00

S4

6.4474E-04

-7.1024E-05

4.4950E-06

-1.2404E-07

0.0000E+00

S5

3.3382E-04

-4.3573E-05

3.1274E-06

-9.4857E-08

0.0000E+00

S6

-8.8238E-03

2.3965E-03

-4.2124E-04

4.2846E-05

-1.9085E-06

0.0000E+00

S7

3.2885E-04

-6.5048E-05

7.0798E-06

-3.2497E-07

0.0000E+00

S8

-4.3873E-04

9.1465E-05

-1.1256E-05

6.1421E-07

0.0000E+00

S9

-9.9120E-04

2.8532E-04

-4.4285E-05

3.4437E-06

-9.6572E-08

0.0000E+00

S10

6.5599E-04

-9.5107E-05

7.8774E-06

-2.8512E-07

0.0000E+00

Table 10

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

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

In summary, examples one to five satisfy the relationships shown in table 11, respectively.

TABLE 11

Table 12 gives the effective focal lengths f of the photographing lens groups of examples one to five, and the effective focal lengths f1 to f5 of the respective lenses.

Example parameters	1	2	3	4	5
						f1(mm)	16.32	13.25	14.42	13.85	13.81
f2(mm)	7.04	8.85	7.98	8.22	8.60
						f3(mm)	-3.75	-4.28	-4.30	-4.91	-5.09
f4(mm)	6.22	7.02	7.18	9.18	9.59
						f5(mm)	-15.43	-17.87	-15.98	-17.75	-19.13
f(mm)	10.57	10.57	10.57	10.57	10.57
						TTL(mm)	10.40	10.40	10.40	10.40	10.39
ImgH(mm)	3.47	3.47	3.47	3.47	3.47
						FOV(°)	35.40	35.29	35.16	35.06	35.06

Table 12

The present application also provides an imaging device, the electron-sensitive element of which may be a photosensitive coupling element (CCD) or a complementary metal oxide semiconductor element (CMOS). The imaging device may be a stand alone imaging device such as a digital camera or an imaging module integrated on a mobile electronic device such as a cell phone. The imaging device is equipped with the above-described photographic lens group.

It will be apparent that the embodiments described above are merely some, but not all, embodiments of the invention. All other embodiments, which can be made by those skilled in the art based on the embodiments of the present invention without making any inventive effort, shall fall within the 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 in accordance with the present application. As used herein, the singular is also intended to include the plural unless the context clearly indicates otherwise, and furthermore, it is to be understood that the terms "comprises" and/or "comprising" when used in this specification are taken to specify the presence of stated 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 the present application and the above figures are used for distinguishing between similar objects and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used may be interchanged where appropriate such that embodiments of the present application described herein may be implemented in sequences other than those illustrated or described herein.

The above description is only of the preferred embodiments of the present invention and is not intended to limit the present invention, but various modifications and variations can be made to the present invention by those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A photographic lens group, characterized in that the photographic lens group has only five lenses, comprising, in order from an incident side of the photographic lens group to an outgoing side of the photographic lens group:

a first lens element with positive refractive power having a convex surface on a light-entering side and a concave surface on a light-exiting side;

A second lens with positive refractive power, wherein a surface of the second lens close to the light incident side is a convex surface;

a third lens element with negative refractive power having a concave surface on a surface thereof closer to the light exit side;

a fourth lens element with positive refractive power having a convex surface on a light-entering side;

a fifth lens element with negative refractive power having a convex surface on a light-entering side and a concave surface on a light-exiting side;

wherein, the effective focal length f of the photographic lens group and the maximum field angle FOV of the photographic lens group satisfy the following conditions: 12mm < f/tan (FOV) <17mm;

the effective focal length f1 of the first lens, the effective focal length f2 of the second lens and the effective focal length f4 of the fourth lens satisfy the following conditions: 0.6< (f2+f4)/f1 <1.6.

2. The photographic lens group 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: 3.4< f5/f3<4.4.

3. The photographing lens assembly as claimed in claim 1, wherein a radius of curvature R1 of a surface of the first lens on the light incident side and a radius of curvature R2 of a surface of the first lens on the light emergent side satisfy: 2.6< (R2+R1)/(R2-R1) <4.0.

4. The photographing lens assembly as claimed in claim 1, wherein a radius of curvature R3 of a surface of the second lens adjacent to the light incident side and a radius of curvature R6 of a surface of the third lens adjacent to the light emergent side satisfy: 1.1< R3/R6<1.6.

5. The photographing lens assembly as claimed in claim 1, wherein a radius of curvature R9 of a surface of the fifth lens adjacent to the light incident side and a radius of curvature R10 of a surface of the fifth lens adjacent to the light exiting side satisfy: 6.0< (R9+R10)/(R9-R10) <8.2.

6. The photographic lens group of claim 1, wherein a maximum field angle FOV of the photographic lens group satisfies: 30 ° < FOV <45 °.

7. The photographic lens group according to claim 1, wherein a combined focal length f12 of the first lens and the second lens, a center thickness CT1 of the first lens, and a center thickness CT2 of the second lens satisfy: 2.2< f 12/(CT1+CT2) <2.9.

8. The photographic lens group according to claim 1, wherein a combined focal length f34 of the third lens and the fourth lens, a center thickness CT3 of the third lens, and a center thickness CT4 of the fourth lens satisfy: -14< f 34/(CT3+CT4) < -11.

9. The photographic lens group according to claim 1, wherein an on-axis distance BFL between a surface of the first lens, the second lens, the third lens, the fourth lens, and a surface of the fifth lens near the light exit side to an imaging surface of the photographic lens group satisfies: 1.5< f1234/BFL <2.0.

10. The photographic lens group of claim 1, wherein an edge thickness ET3 of the third lens and an edge thickness ET2 of the second lens satisfy: 2.1< ET3/ET2<2.9.

11. The photographic lens group according to claim 1, wherein an air interval T45 between the fourth lens and the fifth lens on an optical axis of the photographic lens group, an edge thickness ET4 of the fourth lens, and an edge thickness ET5 of the fifth lens satisfy: 0.8< T45/(ET 4+ ET 5) <1.5.