CN114114639A

CN114114639A - Photographic lens group

Info

Publication number: CN114114639A
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: 2022-03-01
Anticipated expiration: 2041-12-20
Also published as: CN114114639B; CN117518412A

Abstract

The invention provides a photographic lens group, which sequentially comprises the following components from the light inlet side of the photographic lens group to the light outlet 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, which is close to the light incidence side, is a convex surface; the third lens has negative refractive power, and the surface of the third lens, which is close to the light-emitting side, is a concave surface; the fourth lens element with positive refractive power has a convex surface on a surface thereof near the light incident side; the fifth lens element with negative refractive power has a convex surface on the surface close to the light incident side and a concave surface on the surface close to the light emergent side; wherein, the effective focal length f of the photographing lens group and the maximum field angle FOV of the photographing lens group satisfy: 12mm < f/tan (FOV) <17 mm. The invention solves the problem that the miniaturization and high image quality of the lens in the prior art can not be considered at the same time.

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 telephoto lens tends to be diversified, such as 2X/5X/10X. But the 2X to 5X span is large and for some consumers, 3X tele lenses may be favored. Limited by the height of the lens, the 3X lens is not easy to assemble on the mobile terminal, so that the miniaturization and high image quality of the lens cannot be met simultaneously.

That is, the lens in the prior art has the problem that miniaturization and high image quality can not be compatible.

Disclosure of Invention

The invention mainly aims to provide a photographic lens group to solve the problem that in the prior art, the miniaturization and high image quality of a lens cannot be achieved at the same time.

In order to achieve the above object, according to one aspect of the present invention, there is provided a photographing lens group comprising, in order from an incident side of the photographing lens group to an emergent side of the photographing 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, which is close to the light incidence side, is a convex surface; the third lens has negative refractive power, and the surface of the third lens, which is close to the light-emitting side, is a concave surface; the fourth lens element with positive refractive power has a convex surface on a surface thereof near the light incident side; the fifth lens element with negative refractive power has a convex surface on the surface close to the light incident side and a concave surface on the surface close to the light emergent side; wherein, the effective focal length f of the photographing lens group and the maximum field angle FOV of the photographing lens group satisfy: 12mm < f/tan (FOV) <17 mm.

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 inlet side and the curvature radius R2 of the surface of the first lens close to the light outlet side satisfy that: 2.6< (R2+ R1)/(R2-R1) < 4.0.

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

Further, the curvature radius R9 of the surface of the fifth lens close to the light inlet side and the curvature radius R10 of the surface of the fifth lens close to the light outlet side satisfy that: 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 central thickness CT1 of the first lens, and the central thickness CT2 of the second lens satisfy: 2.2< f12/(CT1+ CT2) < 2.9.

Further, the combined focal length f34 of the third lens and the fourth lens, the central thickness CT3 of the third lens, and the central thickness CT4 of the fourth lens satisfy: -14< f34/(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 axial distance BFL from the surface of the fifth lens close to the light-emitting side to the imaging surface of the photographing lens group satisfy the following conditions: 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 group, the edge thickness ET4 of the fourth lens, and the edge thickness ET5 of the fifth lens satisfy: 0.8< T45/(ET4+ ET5) < 1.5.

According to another aspect of the present invention, there is provided a photographing lens group, comprising in order along a light-in side of the photographing lens group to a light-out side of the photographing 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, which is close to the light incidence side, is a convex surface; the third lens has negative refractive power, and the surface of the third lens, which is close to the light-emitting side, is a concave surface; the fourth lens element with positive refractive power has a convex surface on a surface thereof near the light incident side; the fifth lens element with negative refractive power has a convex surface on the surface close to the light incident side and a concave surface on the surface close to the light emergent side; wherein, the combined focal length f34 of the third lens and the fourth lens, the central thickness CT3 of the third lens and the central thickness CT4 of the fourth lens satisfy: -14< f34/(CT3+ CT4) < -11.

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

The first lens and the second lens are set to have positive refractive power, so that the incident light rays can be converged by the photographing lens group, and the imaging light rays can enter subsequent lenses conveniently. The third lens is set to have negative refractive power, so that chromatic aberration of the photographing lens group can be corrected conveniently, light can be raised by the third lens, vignetting is reduced, more light can enter the photographing lens group, and the imaging function of the photographing lens group is ensured. The fourth lens element with positive refractive power and the fifth lens element with negative refractive power can converge light and reduce aberration. The surface of the fifth lens close to the light-in side is a convex surface, and the surface of the fifth lens close to the light-out side is a concave surface, so that the risk of ghost images can be reduced. And controlling f/tan (fov) within a reasonable range helps to reasonably set the effective focal length and the field angle of the photographing lens group, facilitates the size reduction of the photographing lens group, and also makes the light beam deflection small.

Drawings

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

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

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

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

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

fig. 16 is a schematic view showing a configuration of a photographing 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 chromatic aberration of magnification curve, respectively, of the photographing lens group in fig. 16;

fig. 21 is a schematic view showing a configuration of a photographing 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 chromatic aberration of magnification curve, respectively, of the photographing lens group in fig. 21.

Wherein the figures include the following reference numerals:

STO, stop; e1, first lens; s1, the surface of the first lens close to the light incidence side; s2, the surface of the first lens close to the light-emitting side; e2, second lens; s3, the surface of the second lens close to the light incidence side; s4, the surface of the second lens close to the light-emitting side; e3, third lens; s5, the surface of the third lens close to the light incidence side; s6, the surface of the third lens close to the light-emitting side; e4, fourth lens; s7, the surface of the fourth lens close to the light incidence side; s8, the surface of the fourth lens close to the light-emitting side; e5, fifth lens; s9, the surface of the fifth lens close to the light incidence side; s10, the surface of the fifth lens close to the light-emitting side; e6, a filter plate; s11, the surface of the filter close to the light incident side; s12, enabling the filter to be close to the surface of the light emergent side; 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 embodiments with reference to the attached drawings.

It is noted that, unless otherwise indicated, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs.

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

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

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

Herein, the paraxial region refers to a region near the optical axis. If the lens surface is convex and the convex position is not defined, it means that the lens surface is convex at least in the paraxial region; if the lens surface is concave and the concave position is not defined, it means that the lens surface is concave at least in the paraxial region. The surface of each lens close to the object side becomes the surface of the lens close to the light inlet side, and the surface of each lens close to the image side is called the surface of the lens close to the light outlet side. The determination of the surface shape in the paraxial region can be performed by determining whether or not the surface shape is concave or convex, based on the R value (R denotes the radius of curvature of the paraxial region, and usually denotes the R value in a lens database (lens data) in optical software) in accordance with the determination method of a person ordinarily skilled in the art. For 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 case of the image side surface, the image side surface is determined to be concave when the R value is positive, and is determined to be convex when the R value is negative.

The invention provides a photographic lens group, aiming at solving the problem that the miniaturization and high image quality of a lens in the prior art can not be considered at the same time.

Example one

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

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) <16 mm.

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, and the refractive power distribution of the photographic lens group can be controlled, so that the aberration correction of the photographic lens group is facilitated on one hand; on the other hand, the shape of the lens in different positions can be controlled, thereby being beneficial to ghost image optimization of the photographing lens group. 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 two negative lenses, namely the third lens and the fifth lens, are controlled, the trend of light 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 radius of curvature R1 of the surface of the first lens on the light incident side and the radius of curvature R2 of the surface of the first lens on the light exit side satisfy: 2.6< (R2+ R1)/(R2-R1) < 4.0. The surface of the first lens close to the light-in side and the surface of the first lens close to the light-out side are reasonably controlled, so that the phenomenon that the refractive power is too large, so that the aberration is too large, and the later correction is not good can be avoided; on the other hand, the problem that the lens has insufficient convergence capability due to too small refractive power can be avoided, so that the imaging quality of the photographing lens group is ensured. Preferably, 2.7< (R2+ R1)/(R2-R1) < 3.9.

In the present embodiment, the radius of curvature R3 of the surface of the second lens on the light incident side and the radius of curvature R6 of the surface of the third lens on the light exit side satisfy: 1.1< R3/R6< 1.6. The curvature radius of the surface of the second lens close to the light inlet side and the curvature radius of the surface of the third lens close to the light outlet side are controlled, so that the two surfaces can be ensured to be consistent in bending direction, the second lens and the third lens can be similar to a double cemented lens, and chromatic aberration correction of the photographing lens group is facilitated. Preferably, 1.2< R3/R6< 1.5.

In the present embodiment, a curvature radius R9 of a surface of the fifth lens on the light incident side and a curvature radius R10 of a surface of the fifth lens on the light exit side satisfy: 6.0< (R9+ R10)/(R9-R10) < 8.2. By controlling the curvature radius of the surface of the fifth lens close to the light incident side and the curvature radius of the surface of the fifth lens close to the light emergent side, the ghost image of the chip caused by chip reflection can be avoided. Meanwhile, the direction of the emergent light of the optical photographing lens group can be properly controlled, and CRA matching of the photographing lens group 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 photographing lens group, the equivalent focal length of the photographing lens group can be ensured, the concept of long focus of the photographing lens group is met, and the requirement of a consumer for shooting a distant object is met. Preferably 33 ° < FOV <40 °.

In the present embodiment, the combined focal length f12 of the first lens and the second lens, the central thickness CT1 of the first lens, and the central thickness CT2 of the second lens satisfy: 2.2< f12/(CT1+ CT2) < 2.9. The above conditional expressions give consideration to the focal length of the lens and the thickness of the lens in the photographic lens group, on one hand, the central thickness of the lens is ensured, on the other hand, the lens cannot be bent too much, and both the two aspects are beneficial to the molding of the lens. Preferably, 2.3< f12/(CT1+ CT2) < 2.8.

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

In this embodiment, 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 from the surface of the fifth lens close to the light-emitting side to the imaging surface of the photographing lens group satisfy: 1.5< f1234/BFL < 2.0. By controlling the composite focal length of the front four lenses, the incident height of the light to the last lens can be restricted, so that the height of the lens barrel is controlled, and the miniaturization of the lens barrel is facilitated; by controlling the distance from the surface of the fifth lens close to the light emitting side to the axis of the imaging surface, the telescopic length of the photographing lens group is controlled, and the matching of the stroke of the motor is facilitated. 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. By controlling the edge thickness of the two lenses, the molding of the lenses is facilitated on one hand; 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. 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 group, the edge thickness ET4 of the fourth lens, and the edge thickness ET5 of the fifth lens satisfy: 0.8< T45/(ET4+ ET5) < 1.5. By controlling the thickness and the air interval of the fourth lens and the fifth lens, on one hand, a thick space ring can be prevented from being arranged between the two lenses, so that stray light caused by the thick space ring is avoided; on the other hand, the forming process and the assembling process of the fourth lens and the fifth lens can be ensured, and the reliability of the photographic lens group is facilitated. Preferably, 0.9< T45/(ET4+ ET5) < 1.4.

Example two

As shown in fig. 1 to 25, the photographing lens assembly sequentially includes, from the light incident side to the light exiting side of the photographing lens assembly: the first lens has positive refractive power, the surface of the first lens, which is close to the light inlet side, is a convex surface, and the surface of the first lens, which is close to the light outlet side, is a concave surface; the second lens has positive refractive power, and the surface of the second lens, which is close to the light incidence side, is a convex surface; the third lens has negative refractive power, and the surface of the third lens, which is close to the light emergent side, is a concave surface; the fourth lens element with positive refractive power has a convex surface on the light incident side; the fifth lens element with negative refractive power has a convex surface on the surface thereof near the light incident side and a concave surface on the surface thereof near the light emergent side; wherein, the combined focal length f34 of the third lens and the fourth lens, the central thickness CT3 of the third lens and the central thickness CT4 of the fourth lens satisfy: -14< f34/(CT3+ CT4) < -11.

The first lens and the second lens are set to have positive refractive power, so that the incident light rays can be converged by the photographing lens group, and the imaging light rays can enter subsequent lenses conveniently. The third lens is set to have negative refractive power, so that chromatic aberration of the photographing lens group can be corrected conveniently, light can be raised by the third lens, vignetting is reduced, more light can enter the photographing lens group, and the imaging function of the photographing lens group is ensured. The fourth lens element with positive refractive power and the fifth lens element with negative refractive power can converge light and reduce aberration. The surface of the fifth lens close to the light-in side is a convex surface, and the surface of the fifth lens close to the light-out side is a concave surface, so that the risk of ghost images can be reduced. The refractive powers of the third lens and the fourth lens are different, and chromatic aberration correction can be facilitated by controlling the synthetic focal length of the third lens and the fourth lens; meanwhile, the center thicknesses of the third lens and the fourth lens are controlled, and the formability of the lenses can be ensured.

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

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

The photographing lens group in the present application may employ a plurality of lenses, for example, the above-mentioned 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 photographing lens group can be effectively increased, the sensitivity of the lens can be reduced, and the machinability of the lens can be improved, so that the photographing 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 better curvature radius characteristics, and has advantages of improving distortion aberration and improving astigmatic aberration. After the aspheric lens is adopted, the aberration generated during imaging can be eliminated as much as possible, thereby improving the imaging quality.

However, it will be appreciated by those skilled in the art that the number of lenses constituting a photographing lens group may be varied without departing from the technical solutions claimed in the present application to obtain the respective results and advantages described in the present specification. For example, although five lenses are exemplified in the embodiment, the photographing lens group is not limited to include five lenses. The photographing lens group may further include other numbers of lenses, if necessary.

Specific surface types and parameters of the photographing lens group applicable to the above embodiments are further described below with reference to the accompanying drawings.

It should be noted that any one 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 photographing lens group of the first example of the present application is described. Fig. 1 shows a schematic view of a photographing lens group structure of example one.

As shown in fig. 1, 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 image plane S13.

The first lens element E1 with positive refractive power has a convex surface S1 on the light-incident side and a concave surface S2 on the light-exit 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 emergent side. The third lens element E3 with negative refractive power has a concave surface S5 on the light incident side and a concave surface S6 on the light emergent 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-exit 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 emergent side. The filter E6 has a surface S11 close to the light entrance side and a surface S12 close to the light exit side. 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 photographing lens group is 10.57mm, the total length TTL of the photographing lens group is 10.40mm, and the image height ImgH is 3.47 mm.

Table 1 shows a basic structural parameter table of a photographing lens group of example one, in which the units of a curvature radius, a thickness/distance, a focal length, and an 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 surfaces, and the surface shape of each aspheric lens can be defined by, but is not limited to, the following aspheric surface formula:

wherein x is the 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 that can be used for each of the aspherical mirrors S1-S10 in example one.

Flour mark

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

Flour mark

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

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

Example two

As shown in fig. 6 to 10, a photographic 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. 6 shows a schematic diagram of a photographing lens group structure of example two.

As shown in fig. 6, 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 image plane S13.

The first lens element E1 with positive refractive power has a convex surface S1 on the light-incident side and a concave surface S2 on the light-exit side. The second lens element E2 with positive refractive power has a convex surface S3 on the light incident side and a concave surface S4 on the light emergent side. The third lens element E3 with negative refractive power has a concave surface S5 on the light incident side and a concave surface S6 on the light emergent 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-exit 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 emergent side. The filter E6 has a surface S11 close to the light entrance side and a surface S12 close to the light exit side. The 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 the photographing lens group of example two, in which the units of the radius of curvature, 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

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

Flour mark

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

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

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

Example III

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 photographing 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 image plane S13.

The first lens element E1 with positive refractive power has a convex surface S1 on the light-incident side and a concave surface S2 on the light-exit 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 emergent side. The third lens element E3 with negative refractive power has a concave surface S5 on the light incident side and a concave surface S6 on the light emergent 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-exit 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 emergent side. The filter E6 has a surface S11 close to the light entrance side and a surface S12 close to the light exit side. The 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 the photographing lens group of example three, in which the units of the radius of curvature, 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. 12 shows on-axis chromatic aberration curves of the photographing lens group of example three, which represent convergent focus deviations of light rays of different wavelengths after passing through the photographing lens group. Fig. 13 shows astigmatism curves of the photographing lens group of example three, which represent meridional field curvature and sagittal field curvature. Fig. 14 shows distortion curves of the photographing lens group of example three, which represent values of distortion magnitudes corresponding to different angles of view. Fig. 15 shows a chromatic aberration of magnification curve of a photographing lens group of example three, which represents a deviation of different image heights on an image plane after light passes through the photographing lens group.

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

Example four

As shown in fig. 16 to 20, a photographing lens group of example four of the present application is described. Fig. 16 shows a schematic diagram of a photographing 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 image plane S13.

The first lens element E1 with positive refractive power has a convex surface S1 on the light-incident side and a concave surface S2 on the light-exit 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 emergent side. The third lens element E3 with negative refractive power has a convex surface S5 on the light-incident side and a concave surface S6 on the light-exit 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-exit 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 emergent side. The filter E6 has a surface S11 close to the light entrance side and a surface S12 close to the light exit side. The 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 the photographing lens group of example four, in which the units of the radius of curvature, 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

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

Flour mark

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

As can be seen from fig. 17 to 20, the photographing lens group given in 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 photographing 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 image plane S13.

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

Table 9 shows a basic structural parameter table of the photographic 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 surface in example five, wherein each aspherical mirror surface type can be defined by formula (1) given in example one above.

Flour mark

A4

A6

A8

A10

A12

A14

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

Flour mark

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

Watch 10

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

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

To sum up, examples one to five respectively satisfy the relationships shown in table 11.

TABLE 11

Table 12 gives effective focal lengths f of the photographing lens groups of examples one to five, and 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 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 photographing lens group.

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

It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of 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. A photographic lens assembly, comprising, in order along a light-in side of the photographic lens assembly to a light-out side of the photographic lens assembly:

the first lens has positive refractive power, the surface of the first lens, which is close to the light-in side, is a convex surface, and the surface of the first lens, which is close to the light-out side, is a concave surface;

the second lens has positive refractive power, and the surface of the second lens, which is close to the light incidence side, is a convex surface;

the third lens element with negative refractive power has a concave surface on a surface thereof near the light exit side;

the fourth lens element with positive refractive power has a convex surface on a surface thereof near the light incident side;

the fifth lens element with negative refractive power has a convex surface on a surface close to the light incident side, and has a concave surface on a surface close to the light emergent side;

wherein an effective focal length f of the photographing lens group and a maximum field angle FOV of the photographing lens group satisfy: 12mm < f/tan (FOV) <17 mm.

2. The photographing lens group of claim 1, wherein an effective focal length f1 of the first lens, an effective focal length f2 of the second lens, and an effective focal length f4 of the fourth lens satisfy: 0.6< (f2+ f4)/f1< 1.6.

3. The photographing lens group of 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.

4. The photographing lens group of claim 1, wherein a radius of curvature R1 of a surface of the first lens on a light incident side and a radius of curvature R2 of a surface of the first lens on a light exit side satisfy: 2.6< (R2+ R1)/(R2-R1) < 4.0.

5. The photographing lens group of claim 1, wherein a radius of curvature R3 of a surface of the second lens on a light incident side and a radius of curvature R6 of a surface of the third lens on a light exit side satisfy: 1.1< R3/R6< 1.6.

6. The photographing lens group of claim 1, wherein a radius of curvature R9 of a surface of the fifth lens on a light incident side and a radius of curvature R10 of a surface of the fifth lens on a light exit side satisfy: 6.0< (R9+ R10)/(R9-R10) < 8.2.

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

8. The photographing lens group of claim 1, wherein a combined focal length f12 of the first and second lenses, a center thickness CT1 of the first lens, and a center thickness CT2 of the second lens satisfy: 2.2< f12/(CT1+ CT2) < 2.9.

9. The photographing lens group of 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<f34/(CT3+CT4)<-11。

10. a photographic lens assembly, comprising, in order along a light-in side of the photographic lens assembly to a light-out side of the photographic lens assembly:

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