CN112698501B

CN112698501B - Camera lens group

Info

Publication number: CN112698501B
Application number: CN202110046842.0A
Authority: CN
Inventors: 计云兵; 李杰波; 戴付建; 赵烈烽
Original assignee: Zhejiang Sunny Optics Co Ltd
Current assignee: Zhejiang Sunny Optics Co Ltd
Priority date: 2021-01-14
Filing date: 2021-01-14
Publication date: 2022-08-19
Anticipated expiration: 2041-01-14
Also published as: CN112698501A

Abstract

The invention discloses a photographing lens assembly, which sequentially comprises from an object side to an image side along an optical axis: a diaphragm; a first lens having a positive refractive power, an object-side surface of which is convex; a second lens having an optical power; a third lens having a refractive power, an object-side surface of which is convex; a fourth lens having a refractive power, an image-side surface of which is concave; the first lens is made of glass, and at least one of the second lens, the third lens and the fourth lens is made of plastic; wherein, the on-axis distance TTL from the object side surface of the first lens element to the imaging surface and the effective focal length f of the camera lens assembly satisfy: TTL/f < 1.00; the on-axis distance TTL from the object side surface of the first lens to the imaging surface satisfies the following conditions: TTL is more than or equal to 27.00 mm. The camera lens group provided by the invention effectively ensures the total length and simultaneously ensures higher magnification by controlling the ratio of the axial distance from the object side surface of the first lens to the imaging surface to the effective focal length of the lens group, and the camera lens group is a four-piece type periscopic camera lens group with a long focal length and an aspheric surface.

Description

Camera lens group

Technical Field

The invention belongs to the field of optical imaging, and particularly relates to a camera lens group comprising four lenses.

Background

Along with the continuous development of science and technology, optical imaging modules play more and more important roles in the work and life of people, such as mobile phone and computer camera modules related to entertainment and life, safe and productive vehicle-mounted and security modules and the like, wherein a long-focus camera module occupies a place in a plurality of imaging modules due to the advantage of long-distance camera shooting. Although ordinary short burnt module of making a video recording can clearly form images when the scenery is taken to the short distance, nevertheless can't form images the scenery clearly on the detector when long distance is taken, and the clear method that lets the scenery see through enlargeing the shooting picture can let the picture present more noise and scribble and feel. Compare in the short burnt module of making a video recording, long burnt module of making a video recording can realize long-distance clear formation of image with its natural advantage to still can keep the picture clear under the condition of enlargeing the object one time.

In order to realize clearer imaging in long-distance shooting, a shooting lens group with a longer focal length is required, and the long focal length often causes the total length of the lens group to be too long, so that the thickness of the mobile phone is increased.

Disclosure of Invention

The invention aims to provide a camera lens group consisting of four lenses, which is a four-lens periscopic camera lens group with a long focal length and an aspheric surface.

One aspect of the present invention provides an image capturing lens assembly, in order from an object side to an image side along an optical axis, comprising: a diaphragm; a first lens having a positive refractive power, an object-side surface of which is convex; a second lens having an optical power; a third lens having a refractive power, an object-side surface of which is convex; and a fourth lens having a refractive power, an image-side surface of which is concave; the first lens is made of glass, and at least one of the second lens, the third lens and the fourth lens is made of plastic.

Wherein, the on-axis distance TTL from the object side surface of the first lens to the imaging surface and the effective focal length f of the camera lens group satisfy: TTL/f < 1.00; the on-axis distance TTL from the object side surface of the first lens to the imaging surface satisfies: TTL is more than or equal to 27.00 mm.

According to one embodiment of the invention, the effective focal length f1 of the first lens and the radius of curvature of the object-side surface of the first lens R1 satisfy: 1.00< f1/R1< 3.50.

According to one embodiment of the present invention, the effective focal length f of the image capturing lens group and the effective focal length f1 of the first lens satisfy: 1.00< f/f1< 3.00.

According to one embodiment of the present invention, a combined focal length f23 of the second lens and the third lens and a distance BFL on the optical axis from the image side surface of the fourth lens to the imaging surface of the imaging lens group satisfy: -4.00< f23/BFL < -1.00.

According to one embodiment of the invention, the radius of curvature R5 of the object-side surface of the third lens and the radius of curvature R4 of the image-side surface of the second lens satisfy: 0.50< R5/R4< 2.00.

According to one embodiment of the present invention, the central thickness CT1 of the first lens on the optical axis and the air interval T12 of the first lens and the second lens on the optical axis satisfy: 1.00< CT1/T12< 9.00.

According to one embodiment of the invention, the maximum effective radius DT11 of the object-side surface of the first lens and the maximum effective radius DT12 of the image-side surface of the first lens satisfy: 19.00< (DT11+ DT12)/(DT11-DT12) < 32.00.

According to one embodiment of the present invention, an on-axis distance SAG11 between an intersection point of the first lens object-side surface and the optical axis to an effective radius vertex of the first lens object-side surface and an on-axis distance SAG31 between an intersection point of the third lens object-side surface and the optical axis to an effective radius vertex of the third lens object-side surface satisfy: 1.00< SAG11/SAG31< 5.00.

According to one embodiment of the present invention, the central thickness CT4 of the fourth lens on the optical axis and the air interval T34 of the third lens and the fourth lens on the optical axis satisfy: 2.00< CT4/T34< 14.00.

According to one embodiment of the invention, the edge thickness ET1 of the first lens and the edge thickness ET2 of the second lens satisfy: 1.00< ET1/ET2< 3.50.

In another aspect, the present invention provides an image capturing lens assembly, in order from an object side to an image side along an optical axis, comprising: a diaphragm; a first lens having a positive refractive power, an object-side surface of which is convex; a second lens having an optical power; a third lens having a refractive power, an object-side surface of which is convex; and a fourth lens having a refractive power, an image-side surface of which is concave; the first lens is made of glass, and at least one of the second lens, the third lens and the fourth lens is made of plastic.

Wherein, each lens is independent, and there is air space on the optical axis between each lens; the on-axis distance TTL from the object side surface of the first lens to the imaging surface satisfies: TTL is more than or equal to 27.00 mm; the combined focal length f23 of the second lens and the third lens and the distance BFL from the image side surface of the fourth lens to the imaging surface of the shooting lens group on the optical axis satisfy that: -4.00< f23/BFL < -1.00.

The invention has the beneficial effects that:

the camera lens group provided by the invention comprises a plurality of lenses, such as a first lens, a second lens and a third lens. The ratio of the on-axis distance from the object side surface of the first lens to the imaging surface to the effective focal length of the camera lens group is controlled, so that the total length of the camera lens group can be effectively ensured, and higher magnification is ensured.

Drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings required to be used in the description of the embodiments are briefly introduced below, and it is obvious that the drawings in the description below are only some embodiments of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained according to the drawings without creative efforts.

FIG. 1 is a schematic view of a lens assembly according to an embodiment 1 of the present invention;

FIGS. 2a to 2c are an axial chromatic aberration curve, an astigmatism curve and a distortion curve of the photographing lens assembly of embodiment 1;

FIG. 3 is a schematic view of a lens assembly according to embodiment 2 of the present invention;

FIGS. 4a to 4c are an axial chromatic aberration curve, an astigmatism curve and a distortion curve of the photographing lens assembly of embodiment 2;

FIG. 5 is a schematic view of a lens assembly according to embodiment 3 of the present invention;

FIGS. 6a to 6c are an axial chromatic aberration curve, an astigmatism curve and a distortion curve of the photographing lens assembly of embodiment 3;

FIG. 7 is a schematic view of a lens assembly according to embodiment 4 of the present invention;

FIGS. 8a to 8c are an axial chromatic aberration curve, an astigmatism curve and a distortion curve of the photographing lens assembly of embodiment 4;

FIG. 9 is a schematic view of a lens assembly according to embodiment 5 of the present invention;

FIGS. 10a to 10c are an axial chromatic aberration curve, an astigmatism curve and a distortion curve of the photographing lens assembly of embodiment 5;

FIG. 11 is a schematic view of a lens assembly according to embodiment 6 of the present invention;

fig. 12a to 12c are axial chromatic aberration curves, astigmatism curves and distortion curves of the photographing lens assembly of embodiment 6 of the present invention, respectively;

FIG. 13 is a schematic view of a lens assembly according to embodiment 7 of the present invention;

FIGS. 14a to 14c are an axial chromatic aberration curve, an astigmatism curve and a distortion curve of the photographing lens assembly of embodiment 7 according to the present invention;

FIG. 15 is a schematic view of a lens assembly according to embodiment 8 of the present invention;

fig. 16a to 16c are axial chromatic aberration curves, astigmatism curves and distortion curves of the photographing lens assembly in accordance with embodiment 8 of the present invention.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be obtained by a person skilled in the art without any inventive step based on the embodiments of the present invention, are within the scope of the present 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 invention.

It will be further understood that the terms "comprises," "comprising," "has," "having," "includes" and/or "including," when used in this specification, specify the presence of stated features, elements, and/or components, but do not preclude the presence or addition of one or more other features, elements, components, and/or groups thereof. Moreover, when a statement such as "at least one of" appears after a list of listed features, the entirety of the listed features is modified rather than modifying individual elements in the list. Furthermore, when describing embodiments of the present application, the use of "may" mean "one or more embodiments of the present application. Also, the term "exemplary" is intended to refer to examples or illustrations.

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.

In the description of the present invention, 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 closest to the object is called the object side surface of the lens, and the surface of each lens closest to the imaging surface is called the image side surface of the lens.

Unless otherwise defined, all terms (including 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. It will be further understood that terms, such as those defined in commonly used dictionaries, should be interpreted as having a meaning that is consistent with their meaning in the context of the relevant art and will not be interpreted in an idealized or overly formal sense unless expressly so defined herein.

It should be noted that the embodiments and features of the embodiments may be combined with each other without conflict. Features, principles and other aspects of the present invention will be described in detail below with reference to the accompanying drawings in conjunction with embodiments.

Exemplary embodiments

The image capturing lens assembly according to an exemplary embodiment of the present invention includes four lens elements, in order from an object side to an image side along an optical axis: the lens comprises a first lens, a second lens, a third lens and a fourth lens, wherein the lenses are independent from each other, and air spaces are formed between the lenses on an optical axis.

In the present exemplary embodiment, the first lens has positive optical power, and the object-side surface thereof is convex; the second lens may have a positive or negative optical power; the third lens can have positive focal power or negative focal power, and the object side surface of the third lens is a convex surface; the fourth lens can have positive power or negative power, and the image side surface of the fourth lens is concave. The first lens is made of glass, and at least one of the second lens, the third lens and the fourth lens is made of plastic.

In the present exemplary embodiment, the on-axis distance TTL from the object-side surface of the first lens element to the imaging surface and the effective focal length f of the image capturing lens group satisfy the conditional expression: TTL/f < 1.00. Within this range, the total length of the image pickup lens group can be effectively ensured, and a high magnification can be ensured. More specifically, TTL and f satisfy: 0.8< TTL/f <0.98, e.g., 0.87 ≦ TTL/f ≦ 0.97.

In the present exemplary embodiment, the on-axis distance TTL from the object-side surface of the first lens to the imaging surface satisfies the conditional expression: TTL is more than or equal to 27.00 mm. Within this range, the total length of the image pickup lens group can be effectively secured while ensuring a high magnification. More specifically, TTL satisfies: 27.00mm TTL ≦ 30.00mm, for example, 27.00mm ≦ TTL ≦ 29.59 mm.

In the present exemplary embodiment, the effective focal length f1 of the first lens and the radius of curvature R1 of the object-side surface of the first lens satisfy the conditional expression: 1.00< f1/R1< 3.50. The reasonable distribution of the focal power of the first lens is beneficial to better balancing aberration of the camera lens group and simultaneously beneficial to improving the resolving power of the camera lens group. More specifically, f1 and R1 satisfy: 1.8< f1/R1<3.2, e.g., 1.91. ltoreq. f 1/R1. ltoreq.3.00.

In the present exemplary embodiment, the effective focal length f of the image pickup lens group and the effective focal length f1 of the first lens satisfy the conditional expression: 1.00< f/f1< 3.00. When the ratio is within this range, curvature of field and distortion of the image pickup lens group can be improved while controlling the processing difficulty of the first lens element. More specifically, f and f1 satisfy: 1.3< f/f1<2.9, e.g., 1.38. ltoreq. f/f 1. ltoreq.2.80.

In the present exemplary embodiment, the conditional expression that the combined focal length f23 of the second lens and the third lens and the distance BFL on the optical axis from the image-side surface of the fourth lens to the imaging surface of the image pickup lens group satisfy is: -4.00< f23/BFL < -1.00. When the ratio is in the range, the back focus of the camera lens group can be effectively controlled, and the camera lens group can be ensured to have enough back working distance, so that the chip has enough space for focusing. More specifically, f23 satisfies with BFL: -3.3< f23/BFL < -1.1, e.g., -3.28. ltoreq. f 23/BFL. ltoreq.1.17.

In the present exemplary embodiment, the conditional expression that the radius of curvature R5 of the object-side surface of the third lens and the radius of curvature R4 of the image-side surface of the second lens satisfy is: 0.50< R5/R4< 2.00. The second lens and the third lens are prevented from being bent too much, the processing difficulty is reduced, and meanwhile, the camera lens group has better capability of balancing chromatic aberration and distortion. More specifically, R5 and R4 satisfy: 0.8< R5/R4<1.9, e.g., 0.87. ltoreq. R5/R4. ltoreq.1.81.

In the present exemplary embodiment, the central thickness CT1 of the first lens on the optical axis and the air interval T12 of the first lens and the second lens on the optical axis satisfy the conditional expression: 1.00< CT1/T12< 9.00. The size of the camera lens group can be effectively reduced, the overlarge size of the camera lens group is avoided, the assembling difficulty of the lens is reduced, and the higher space utilization rate is realized. More specifically, CT1 and T12 satisfy: 1.8< CT1/T12<8.9, e.g., 1.88 ≦ CT1/T12 ≦ 8.85.

In the present exemplary embodiment, the maximum effective radius DT11 of the first lens object-side surface and the maximum effective radius DT12 of the first lens image-side surface satisfy the conditional expression: 19.00< (DT11+ DT12)/(DT11-DT12) < 32.00. The first lens is prevented from being bent too much, the processing difficulty is reduced, and meanwhile, the camera lens group has better capability of balancing chromatic aberration and distortion. More specifically, DT11 and DT12 satisfy: 19.05< (DT11+ DT12)/(DT11-DT12) <31.5, e.g., 19.08 ≦ (DT11+ DT12)/(DT11-DT12) ≦ 31.33.

In the present exemplary embodiment, the on-axis spacing distance SAG11 between the intersection of the first lens object-side surface and the optical axis to the effective radius vertex of the first lens object-side surface and the on-axis distance SAG31 between the intersection of the third lens object-side surface and the optical axis to the effective radius vertex of the third lens object-side surface satisfy the conditional expression: 1.00< SAG11/SAG31< 5.00. The first lens and the third lens are prevented from being excessively bent, the processing difficulty is reduced, the tolerance sensitivity is reduced, and meanwhile, the camera lens group has better capability of balancing chromatic aberration and distortion. More specifically, SAG11 and SAG31 satisfy: 1.3< SAG11/SAG31<4.3, e.g., 1.35. ltoreq. SAG11/SAG 31. ltoreq.4.25.

In the present exemplary embodiment, the central thickness CT4 of the fourth lens on the optical axis and the air interval T34 of the third lens and the fourth lens on the optical axis satisfy the conditional expression: 2.00< CT4/T34< 14.00. The size of the camera lens group can be effectively reduced, the overlarge size of the camera lens group is avoided, the assembling difficulty of the lens is reduced, and the high space utilization rate is realized. More specifically, CT4 and T34 satisfy: 2.6< CT4/T34<13.9, e.g., 2.67 ≦ CT4/T34 ≦ 13.85.

In the present exemplary embodiment, the conditional expression that the edge thickness ET1 of the first lens and the edge thickness ET2 of the second lens satisfy is: 1.00< ET1/ET2< 3.50. When the ratio is in the range, the edge of the lens can be effectively prevented from being too thin, the machinability of the lens is ensured, meanwhile, the aberration of the camera lens group is favorably improved, and the good performance is ensured. More specifically, ET1 and ET2 satisfy: 1.1< ET1/ET2<3.1, e.g., 1.14 ≦ ET1/ET2 ≦ 3.03.

In the present exemplary embodiment, the above-described photographing lens group may further include a diaphragm. The stop may be disposed at an appropriate position as needed, for example, the stop may be disposed between the object side and the first lens. Optionally, the above-mentioned image pickup lens group may further include a filter for correcting color deviation and/or a protective glass for protecting the photosensitive element on the image plane.

The image capturing lens assembly according to the above embodiment of the present invention may employ a plurality of lenses, for example, the above four lenses. The focal power and the surface type of each lens, the central thickness of each lens, the on-axis distance between each lens and the like are reasonably distributed, so that the camera lens group has a larger imaging image surface, has the characteristics of wide imaging range and high imaging quality, and ensures the ultrathin property of the mobile phone.

In an exemplary embodiment, at least one of the mirror surfaces of each lens is an aspheric mirror surface, i.e., at least one of the object side surface of the first lens to the image side surface of the fourth lens is an aspheric mirror surface. The aspheric lens is characterized in that: the aspherical lens has a better curvature radius characteristic, and has advantages of improving distortion aberration and astigmatic aberration, unlike a spherical lens having a constant curvature from the lens center to the lens periphery, in which the curvature is continuously varied from the lens center to the lens periphery. After the aspheric lens is adopted, the aberration generated during imaging can be eliminated as much as possible, thereby improving the imaging quality. Optionally, at least one of the object-side surface and the image-side surface of each of the first lens, the second lens, the third lens, and the fourth lens is an aspheric mirror surface. Optionally, each of the first lens, the second lens, the third lens and the fourth lens has an object-side surface and an image-side surface which are aspheric mirror surfaces.

However, it will be appreciated by those skilled in the art that the number of lenses constituting the image capturing lens group can be varied to achieve the various results and advantages described in this specification without departing from the claimed subject matter. For example, although three lenses are exemplified in the embodiment, the photographing lens group is not limited to include three lenses, and the photographing lens group may include other numbers of lenses if necessary.

Specific embodiments of an image pickup lens group suitable for the above-described embodiments are further described below with reference to the drawings.

Detailed description of the preferred embodiment 1

Fig. 1 is a schematic view of a lens assembly according to embodiment 1 of the present disclosure, the lens assembly in order from an object side to an image side includes: a stop STO, a first lens E1, a second lens E2, a third lens E3, a fourth lens E4, a filter E5, and an image plane S11.

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

As shown in table 1, the basic parameter table of the image pickup lens assembly according to embodiment 1 is shown, in which the unit of the curvature radius, the thickness, and the focal length are millimeters (mm).

Flour mark	Surface type	Radius of curvature	Thickness/distance	Focal length	Refractive index	Coefficient of dispersion	Coefficient of cone
								OBJ	Spherical surface	All-round	All-round
STO	Spherical surface	Go to nothing	-0.6670
								S1	Spherical surface	6.9091	2.7000	13.64	1.50	81.6
S2	Spherical surface	-362.7133	1.3750
								S3	Aspherical surface	-622.9190	0.8000	-7.83	1.64	23.5	-99.0000
S4	Aspherical surface	5.1035	0.7261				-1.7700
								S5	Aspherical surface	7.1133	0.8854	12.82	1.67	20.4	0.0604
S6	Aspherical surface	40.0121	0.1000				99.0000
								S7	Aspherical surface	5.5424	1.3850	-75.74	1.55	56.1	-0.7044
S8	Aspherical surface	4.4563	18.5165				0.0217
								S9	Spherical surface	All-round	0.1100		1.52	64.2
S10	Spherical surface	Go to nothing	0.4060
								S11	Spherical surface	Go to nothing

TABLE 1

As shown in table 2, in embodiment 1, the total effective focal length f of the image capturing lens group is 30.76mm, the distance TTL on the optical axis from the object side surface S1 of the first lens element E1 to the imaging surface S11 is 27.00mm, the half ImgH of the diagonal line length of the effective pixel region on the imaging surface S11 is 3.20mm, and the half Semi-FOV of the maximum field angle of the optical imaging system is 5.9 °.

TABLE 2

The image pickup lens group in embodiment 1 satisfies:

TTL/f is 0.88, where TTL is the on-axis distance from the object-side surface of the first lens element to the image plane, and f is the effective focal length of the image capturing lens assembly;

TTL is 27.00mm, wherein TTL is the on-axis distance from the object side surface of the first lens to the imaging surface;

f1/R1 is 2.26, wherein f1 is the effective focal length of the first lens, and R1 is the radius of curvature of the object-side surface of the first lens;

f/f1 is 1.97, where f is the effective focal length of the image pickup lens group, and f1 is the effective focal length of the first lens;

f23/BFL is-1.21, wherein f23 is the combined focal length of the second lens and the third lens, and BFL is the distance from the image side surface of the fourth lens to the imaging surface of the shooting lens group on the optical axis;

R5/R4 is 1.39, where R5 is the radius of curvature of the object-side surface of the third lens and R4 is the radius of curvature of the image-side surface of the second lens;

CT1/T12 is 1.96, where CT1 is the central thickness of the first lens on the optical axis, and T12 is the air space between the first lens and the second lens on the optical axis;

(DT11+ DT12)/(DT11-DT12) ═ 19.08, where DT11 is the maximum effective radius of the object side of the first lens and DT12 is the maximum effective radius of the image side of the first lens;

SAG11/SAG31 is 1.84, wherein SAG11 is an on-axis distance between an intersection point of the object side surface of the first lens and the optical axis and an effective radius vertex of the object side surface of the first lens, and SAG31 is an on-axis distance between an intersection point of the object side surface of the third lens and the optical axis and an effective radius vertex of the object side surface of the third lens;

CT4/T34 is 13.85, where CT4 is the central thickness of the fourth lens on the optical axis, and T34 is the air space between the third lens and the fourth lens on the optical axis;

ET1/ET2 is 1.30, where ET1 is the edge thickness of the first lens and ET2 is the edge thickness of the second lens.

In embodiment 1, the object-side surface and the image-side surface of any one of the first lens E1 to the fourth lens E4 are both aspheric, and the profile x of each aspheric lens can be defined by, but is not limited to, the following aspheric formula:

wherein x is the rise of the distance from the aspheric surface vertex to the aspheric surface vertex when the aspheric surface is at the position with the height of h along the optical axis direction; c is the paraxial curvature of the aspheric surface, c being 1/R (i.e., paraxial curvature c is the inverse of radius of curvature R in table 1); k is a conic coefficient; ai is the correction coefficient of the i-th order of the aspheric surface.

In example 1, the object-side surface and the image-side surface of any one of the second lens E2 through the fourth lens E4 are aspheric, and table 3 shows the high-order term coefficients a that can be used for the aspheric mirror surfaces S3 through S8 in example 1 ₄ 、A ₆ 、A ₈ 、A ₁₀ 、A ₁₂ 、A ₁₄ 、A ₁₆ 、A ₁₈ 、A ₂₀ 、A ₂₂ And A ₂₄ 。

TABLE 3

Fig. 2a shows a chromatic aberration curve on the axis of the image-taking lens group of embodiment 1, which represents the deviation of the convergent focus of light rays of different wavelengths after passing through the lens. Fig. 2b shows an astigmatism curve representing meridional field curvature and sagittal field curvature of the image pickup lens group of embodiment 1. Fig. 2c shows a distortion curve of the image capturing lens group of embodiment 1, which represents distortion magnitude values corresponding to different image heights. As can be seen from fig. 2a to 2c, the imaging lens assembly according to embodiment 1 can achieve good imaging quality.

Specific example 2

Fig. 3 is a schematic view of a lens assembly according to embodiment 2 of the present invention, the lens assembly in order from an object side to an image side includes: a stop STO, a first lens E1, a second lens E2, a third lens E3, a fourth lens E4, a filter E5, and an image plane S11.

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

As shown in table 4, the basic parameter table of the imaging lens group according to embodiment 2 is shown, in which the unit of the curvature radius, the thickness, and the focal length are millimeters (mm).

TABLE 4

As shown in table 5, in embodiment 2, the total effective focal length f of the image capturing lens group is 30.60mm, the distance TTL on the optical axis from the object side surface S1 of the first lens element E1 to the imaging surface S11 is 28.44mm, the half ImgH of the diagonal line length of the effective pixel region on the imaging surface S11 is 3.20mm, and the half Semi-FOV of the maximum field angle of the optical imaging system is 5.9 °. The parameters of each relation are as explained in the first embodiment, and the values of each relation are as listed in the following table.

TABLE 5

In example 2, the object-side surface and the image-side surface of any one of the second lens E2 to the fourth lens E4 are aspheric surfaces, and table 6 shows the high-order term coefficients a that can be used for the aspheric mirror surfaces S3 to S8 in example 2 ₄ 、A ₆ 、A ₈ 、A ₁₀ 、A ₁₂ 、A ₁₄ 、A ₁₆ 、A ₁₈ And A ₂₀ 。

TABLE 6

Fig. 4a shows a chromatic aberration curve on the axis of the image-taking lens group of embodiment 2, which represents the deviation of the convergent focus of light rays of different wavelengths after passing through the lens. Fig. 4b shows an astigmatism curve representing meridional field curvature and sagittal field curvature of the image pickup lens group of embodiment 2. Fig. 4c shows a distortion curve of the image capturing lens group of embodiment 2, which represents distortion magnitude values corresponding to different image heights. As can be seen from fig. 4a to 4c, the imaging lens assembly according to embodiment 2 can achieve good imaging quality.

Specific example 3

Fig. 5 is a lens assembly according to embodiment 3, in order from an object side to an image side, the image lens assembly of the present invention: a stop STO, a first lens E1, a second lens E2, a third lens E3, a fourth lens E4, a filter E5, and an image plane S11.

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

As shown in table 7, the basic parameter table of the imaging lens group according to embodiment 3 is shown, in which the units of the radius of curvature, the thickness, and the focal length are millimeters (mm).

Flour mark	Surface type	Radius of curvature	Thickness/distance	Focal length	Refractive index	Coefficient of dispersion	Coefficient of cone
								OBJ	Spherical surface	All-round	All-round
STO	Spherical surface	All-round	-0.3900
								S1	Spherical surface	9.9134	2.3665	22.16	1.50	81.6
S2	Spherical surface	89.1532	0.4901
								S3	Aspherical surface	26.8771	0.5000	-54.14	1.64	23.5	68.7913
S4	Aspherical surface	15.0877	8.0336				-2.4702
								S5	Aspherical surface	23.2704	0.6871	-200.03	1.67	20.4	31.5836
S6	Aspherical surface	19.5855	0.3409				61.6439
								S7	Aspherical surface	3.0323	1.0055	208.43	1.55	56.1	-0.5835
S8	Aspherical surface	2.7502	15.6327				-0.2472
								S9	Spherical surface	Go to nothing	0.1100		1.52	64.2
S10	Spherical surface	All-round	0.4202
								S11	Spherical surface	All-round

TABLE 7

As shown in table 8, in embodiment 3, the total effective focal length f of the image capturing lens group is 30.61mm, the distance TTL on the optical axis from the object side surface S1 of the first lens element E1 to the imaging surface S11 is 29.59mm, the half ImgH of the diagonal line length of the effective pixel region on the imaging surface S11 is 3.20mm, and the half Semi-FOV of the maximum field angle of the optical imaging system is 5.9 °. The parameters of each relation are as explained in the first embodiment, and the values of each relation are listed in the following table.

TABLE 8

In example 3, the object-side surface and the image-side surface of any one of the second lens E2 to the fourth lens E4 are both aspherical, and table 9 shows high-order term coefficients a usable for the aspherical mirrors S3 to S8 in example 3 ₄ 、A ₆ 、A ₈ 、A ₁₀ 、A ₁₂ 、A ₁₄ 、A ₁₆ 、A ₁₈ And A ₂₀ 。

TABLE 9

Fig. 6a shows a on-axis chromatic aberration curve of the image-taking lens group of embodiment 3, which represents the deviation of the convergent focus of light rays of different wavelengths after passing through the lens. Fig. 6b shows an astigmatism curve representing meridional image plane curvature and sagittal image plane curvature of the image pickup lens group of embodiment 3. Fig. 6c shows a distortion curve of the image capturing lens group of embodiment 3, which represents distortion magnitude values corresponding to different image heights. As shown in fig. 6a to 6c, the image capturing lens assembly according to embodiment 3 can achieve good image quality.

Specific example 4

Fig. 7 is a lens assembly according to embodiment 4 of the present invention, in order from an object side to an image side, the lens assembly includes: a stop STO, a first lens E1, a second lens E2, a third lens E3, a fourth lens E4, a filter E5, and an image plane S11.

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

As shown in table 10, the basic parameter table of the imaging lens group according to embodiment 4 is shown, in which the units of the radius of curvature, the thickness, and the focal length are all millimeters (mm).

Watch 10

As shown in table 11, in embodiment 4, the total effective focal length f of the image pickup lens group is 30.68mm, the distance TTL on the optical axis from the object side surface S1 of the first lens E1 to the imaging surface S11 is 28.27mm, the half ImgH of the diagonal line length of the effective pixel region on the imaging surface S11 is 3.20mm, and the half semifov of the maximum field angle of the optical imaging system is 5.9 °. The parameters of each relation are as explained in the first embodiment, and the values of each relation are listed in the following table.

TABLE 11

In example 4, the object-side surface and the image-side surface of any one of the second lens E2 to the fourth lens E4 are aspheric, and table 12 shows the high-order term coefficients a that can be used for the aspheric mirror surfaces S3 to S8 in example 4 ₄ 、A ₆ 、A ₈ 、A ₁₀ 、A ₁₂ 、A ₁₄ 、A ₁₆ 、A ₁₈ And A ₂₀ 。

TABLE 12

Fig. 8a shows on-axis chromatic aberration curves of the image-taking lens group of embodiment 4, which represent deviation of convergent focuses of light rays of different wavelengths after passing through the lens. Fig. 8b shows an astigmatism curve representing meridional field curvature and sagittal field curvature of the image pickup lens group of embodiment 4. Fig. 8c shows a distortion curve of the image capturing lens group of embodiment 4, which represents distortion magnitude values corresponding to different image heights. As can be seen from fig. 8a to 8c, the imaging lens assembly according to embodiment 4 can achieve good imaging quality.

Specific example 5

Fig. 9 is a lens assembly according to embodiment 5 of the present invention, wherein the image capturing lens assembly includes, in order from an object side to an image side: a stop STO, a first lens E1, a second lens E2, a third lens E3, a fourth lens E4, a filter E5, and an image plane S11.

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

As shown in table 13, the basic parameter table of the imaging lens group according to embodiment 5 is shown, in which the units of the radius of curvature, the thickness, and the focal length are all millimeters (mm).

Flour mark	Surface type	Radius of curvature	Thickness/distance	Focal length	Refractive index	Coefficient of dispersion	Coefficient of cone
								OBJ	Spherical surface	All-round	All-round
STO	Spherical surface	All-round	-0.6158
								S1	Spherical surface	7.2920	2.6705	14.03	1.50	81.6
S2	Spherical surface	-150.0000	1.2157
								S3	Aspherical surface	149.9221	0.8000	-8.45	1.64	23.5	-99.0000
S4	Aspherical surface	5.2570	0.7153				-1.8515
								S5	Aspherical surface	8.7279	0.9948	13.50	1.67	20.4	-0.1311
S6	Aspherical surface	253.6704	0.2280				-99.0000
								S7	Aspherical surface	5.3919	1.3791	-66.84	1.55	56.1	-0.5425
S8	Aspherical surface	4.2738	19.1922				-0.0542
								S9	Spherical surface	All-round	0.1100		1.52	64.2
S10	Spherical surface	Go to nothing	0.4756
								S11	Spherical surface	Go to nothing

Watch 13

As shown in table 14, in embodiment 5, the total effective focal length f of the image capturing lens group is 31.11mm, the distance TTL on the optical axis from the object side surface S1 of the first lens element E1 to the imaging surface S11 is 27.78mm, the half ImgH of the diagonal line length of the effective pixel region on the imaging surface S11 is 3.20mm, and the half Semi-FOV of the maximum field angle of the optical imaging system is 5.8 °. The parameters of each relation are as explained in the first embodiment, and the values of each relation are as listed in the following table.

TABLE 14

In embodiment 5, the second lens E2 to the fourth lens E4Both the object-side surface and the image-side surface of any of the lenses are aspherical, and Table 15 shows the high-order term coefficients A that can be used for the aspherical mirror surfaces S3-S8 in example 5 ₄ 、A ₆ 、A ₈ 、A ₁₀ 、A ₁₂ 、A ₁₄ 、A ₁₆ 、A ₁₈ 、A ₂₀ 、A ₂₂ And A ₂₄ 。

Watch 15

Fig. 10a shows a on-axis chromatic aberration curve of the image-taking lens group of embodiment 5, which represents the deviation of the convergent focus of light rays of different wavelengths after passing through the lens. Fig. 10b shows an astigmatism curve representing meridional field curvature and sagittal field curvature of the image pickup lens group of embodiment 5. Fig. 10c shows a distortion curve of the image capturing lens group of embodiment 5, which represents distortion magnitude values corresponding to different image heights. As can be seen from fig. 10a to 10c, the image capturing lens assembly according to embodiment 5 can achieve good image quality.

Specific example 6

Fig. 11 is a lens assembly according to embodiment 6, which, in order from an object side to an image side along an optical axis, includes: a stop STO, a first lens E1, a second lens E2, a third lens E3, a fourth lens E4, a filter E5, and an image plane S11.

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

As shown in table 16, the basic parameter table of the imaging lens group according to embodiment 6 is shown, in which the units of the radius of curvature, the thickness, and the focal length are all millimeters (mm).

Flour mark	Surface type	Radius of curvature	Thickness/distance	Focal length	Refractive index	Coefficient of dispersion	Coefficient of cone
								OBJ	Spherical surface	All-round	All-round
STO	Spherical surface	All-round	-0.6747
								S1	Spherical surface	6.8544	2.6722	14.06	1.50	81.6
S2	Spherical surface	268.8071	1.3005
								S3	Aspherical surface	149.9221	0.7793	-8.25	1.64	23.5	-99.0000
S4	Aspherical surface	5.1375	0.7925				-1.8176
								S5	Aspherical surface	7.6975	0.8660	13.44	1.67	20.4	-0.1711
S6	Aspherical surface	51.4060	0.1061				99.0000
								S7	Aspherical surface	5.5075	1.3850	-82.86	1.55	56.1	-0.7052
S8	Aspherical surface	4.4739	18.8325				-0.0387
								S9	Spherical surface	All-round	0.1100		1.52	64.2
S10	Spherical surface	Go to nothing	0.4725
								S11	Spherical surface	All-round

TABLE 16

As shown in table 17, in embodiment 6, the total effective focal length f of the image pickup lens group is 30.69mm, the distance TTL on the optical axis from the object side surface S1 of the first lens E1 to the imaging surface S11 is 27.32mm, the half ImgH of the diagonal line length of the effective pixel region on the imaging surface S11 is 3.20mm, and the half semifov of the maximum field angle of the optical imaging system is 5.9 °. The parameters of each relation are as explained in the first embodiment, and the values of each relation are listed in the following table.

TABLE 17

In example 6, the object-side surface and the image-side surface of any one of the second lens E2 to the fourth lens E4 were both aspherical, and table 18 shows high-order term coefficients a usable for the aspherical mirrors S3 to S8 in example 6 ₄ 、A ₆ 、A ₈ 、A ₁₀ 、A ₁₂ 、A ₁₄ 、A ₁₆ 、A ₁₈ 、A ₂₀ 、A ₂₂ And A ₂₄ 。

Watch 18

Fig. 12a shows on-axis chromatic aberration curves of the image-taking lens group of embodiment 6, which represent deviation of convergent focuses of light rays of different wavelengths after passing through the lens. Fig. 12b shows an astigmatism curve representing meridional image plane curvature and sagittal image plane curvature of the image pickup lens group of embodiment 6. Fig. 12c shows a distortion curve of the image capturing lens group according to embodiment 6, which represents the distortion magnitude values corresponding to different image heights. As can be seen from fig. 12a to 12c, the imaging lens assembly according to embodiment 6 can achieve good imaging quality.

Specific example 7

Fig. 13 is a lens assembly according to embodiment 7, in order from an object side to an image side, the image lens assembly includes: a stop STO, a first lens E1, a second lens E2, a third lens E3, a fourth lens E4, a filter E5, and an image plane S11.

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

As shown in table 19, the basic parameter table of the imaging lens group according to embodiment 7 is shown, in which the units of the radius of curvature, the thickness, and the focal length are all millimeters (mm).

Watch 19

As shown in table 20, in embodiment 7, the total effective focal length f of the image pickup lens group is 30.91mm, the distance TTL on the optical axis from the object side surface S1 of the first lens E1 to the imaging surface S11 is 27.68mm, the half ImgH of the diagonal line length of the effective pixel area on the imaging surface S11 is 3.20mm, and the half semifov of the maximum field angle of the optical imaging system is 5.9 °. The parameters of each relation are as explained in the first embodiment, and the values of each relation are listed in the following table.

Watch 20

In example 7, the object-side surface and the image-side surface of any one of the second lens E2 to the fourth lens E4 are aspheric, and table 21 shows the high-order term coefficients a that can be used for the aspheric mirror surfaces S3 to S8 in example 7 ₄ 、A ₆ 、A ₈ 、A ₁₀ 、A ₁₂ 、A ₁₄ 、A ₁₆ 、A ₁₈ 、A ₂₀ 、A ₂₂ And A ₂₄ 。

TABLE 21

Fig. 14a shows on-axis chromatic aberration curves of the image-taking lens group of embodiment 7, which represent deviation of convergent focuses of light rays of different wavelengths through the lens. Fig. 14b shows an astigmatism curve representing meridional field curvature and sagittal field curvature of the image pickup lens group of embodiment 7. Fig. 14c shows a distortion curve of the image capturing lens group of embodiment 7, which represents distortion magnitude values corresponding to different image heights. As can be seen from fig. 14a to 14c, the image capturing lens assembly according to embodiment 7 can achieve good image quality.

Specific example 8

Fig. 15 is a lens assembly according to embodiment 8, in order from an object side to an image side, the image lens assembly of the present invention: a stop STO, a first lens E1, a second lens E2, a third lens E3, a fourth lens E4, a filter E5, and an image plane S11.

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

As shown in table 22, the basic parameter table of the imaging lens group according to embodiment 8 is shown, in which the units of the radius of curvature, thickness, and focal length are millimeters (mm).

Flour mark	Surface type	Radius of curvature	Thickness/distance	Focal length	Refractive index	Coefficient of dispersion	Coefficient of cone
								OBJ	Spherical surface	Go to nothing	Go to nothing
STO	Spherical surface	Go to nothing	-0.7966
								S1	Spherical surface	6.2525	2.6909	11.94	1.50	81.6
S2	Spherical surface	-106.7878	1.4341
								S3	Aspherical surface	-45.3313	0.7971	-6.90	1.64	23.5	96.2590
S4	Aspherical surface	4.9783	0.5484				-1.8491
								S5	Aspherical surface	8.3707	0.9876	10.18	1.67	20.4	-0.2746
S6	Aspherical surface	-34.5979	0.1745				89.7863
								S7	Aspherical surface	-250.0000	1.3850	-28.40	1.55	56.1	99.0000
S8	Aspherical surface	16.5794	20.6362				3.2665
								S9	Spherical surface	All-round	0.1100		1.52	64.2
S10	Spherical surface	Go to nothing	0.4931
								S11	Spherical surface	All-round

TABLE 22

As shown in table 23, in embodiment 8, the total effective focal length f of the image pickup lens group is 33.46mm, the distance TTL on the optical axis from the object side surface S1 of the first lens E1 to the imaging surface S11 is 29.26mm, the half ImgH of the diagonal line length of the effective pixel region on the imaging surface S11 is 3.20mm, and the half semifov of the maximum field angle of the optical imaging system is 5.4 °. The parameters of each relation are as explained in the first embodiment, and the values of each relation are listed in the following table.

TABLE 23

In example 8, the object-side surface and the image-side surface of any one of the second lens E2 to the fourth lens E4 were both aspherical, and table 24 shows high-order term coefficients a usable for the aspherical mirrors S3 to S8 in example 8 ₄ 、A ₆ 、A ₈ 、A ₁₀ 、A ₁₂ 、A ₁₄ 、A ₁₆ 、A ₁₈ 、A ₂₀ 、A ₂₂ And A ₂₄ 。

TABLE 24

Fig. 16a shows on-axis chromatic aberration curves of the image-taking lens group of embodiment 8, which represent deviation of convergent focuses of light rays of different wavelengths after passing through the lens. Fig. 16b shows an astigmatism curve representing meridional image plane curvature and sagittal image plane curvature of the image pickup lens group of embodiment 8. Fig. 16c shows a distortion curve of the image capturing lens group of embodiment 8, which represents distortion magnitude values corresponding to different image heights. As can be seen from fig. 16a to 16c, the image capturing lens assembly according to embodiment 8 can achieve good image quality.

The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, improvements, equivalents and the like that fall within the spirit and principle of the present invention are intended to be included within the scope of the present invention.

Claims

1. An image capturing lens assembly, wherein four lens elements having optical power are disposed in order from an object side to an image side along an optical axis, comprising:

a diaphragm;

a first lens having a positive refractive power, an object-side surface of which is convex;

a second lens having a refractive power, an image-side surface of which is concave;

a third lens having a refractive power, an object-side surface of which is convex;

a fourth lens having a refractive power, an image-side surface of which is concave;

the first lens is made of glass, and at least one of the second lens, the third lens and the fourth lens is made of plastic;

wherein, the on-axis distance TTL from the object side surface of the first lens to the imaging surface and the effective focal length f of the camera lens group satisfy: TTL/f < 1.00; the on-axis distance TTL from the object side surface of the first lens to the imaging surface satisfies: TTL is more than or equal to 27.00 mm;

wherein the radius of curvature R5 of the object-side surface of the third lens and the radius of curvature R4 of the image-side surface of the second lens satisfy: 0.50< R5/R4< 2.00.

2. The camera lens group of claim 1, wherein: an effective focal length f1 of the first lens and a radius of curvature R1 of the object side of the first lens satisfy: 1.00< f1/R1< 3.50.

3. The image capturing lens group of claim 1, wherein: the effective focal length f of the image pickup lens group and the effective focal length f1 of the first lens meet: 1.00< f/f1< 3.00.

4. The camera lens group of claim 1, wherein: the combined focal length f23 of the second lens and the third lens and the distance BFL on the optical axis from the image side surface of the fourth lens to the imaging surface of the shooting lens group satisfy that: -4.00< f23/BFL < -1.00.

5. The image capturing lens group of claim 1, wherein: the central thickness CT1 of the first lens on the optical axis and the air interval T12 of the first lens and the second lens on the optical axis satisfy that: 1.00< CT1/T12< 9.00.

6. The camera lens group of claim 1, wherein: the maximum effective radius DT11 of the first lens object-side surface and the maximum effective radius DT12 of the first lens image-side surface satisfy: 19.00< (DT11+ DT12)/(DT11-DT12) < 32.00.

7. The image capturing lens group of claim 1, wherein: an on-axis spacing distance SAG11 between the intersection of the first lens object-side surface and the optical axis to the effective radius vertex of the first lens object-side surface and an on-axis distance SAG31 between the intersection of the third lens object-side surface and the optical axis to the effective radius vertex of the third lens object-side surface satisfy: 1.00< SAG11/SAG31< 5.00.

8. The image capturing lens group of claim 1, wherein: the central thickness CT4 of the fourth lens on the optical axis and the air interval T34 of the third lens and the fourth lens on the optical axis satisfy that: 2.00< CT4/T34< 14.00.

9. The camera lens group of claim 1, wherein: the edge thickness ET1 of the first lens and the edge thickness ET2 of the second lens satisfy: 1.00< ET1/ET2< 3.50.

10. An image capturing lens assembly comprising, in order from an object side to an image side along an optical axis, four lens elements having refractive power:

a diaphragm;

a first lens having a positive refractive power, the object-side surface of which is convex;

the first lens is made of glass, and at least one of the second lens, the third lens and the fourth lens is made of plastic; wherein, the on-axis distance TTL from the object side surface of the first lens to the imaging surface satisfies: TTL is more than or equal to 27.00 mm; the combined focal length f23 of the second lens and the third lens and the distance BFL on the optical axis from the image side surface of the fourth lens to the imaging surface of the shooting lens group satisfy that: -4.00< f23/BFL < -1.00;

wherein an effective focal length f1 of the first lens and a radius of curvature R1 of the object side surface of the first lens satisfy: 1.00< f1/R1< 3.50.

11. The camera lens group of claim 10, wherein: the on-axis distance TTL from the object side surface of the first lens to the imaging surface and the effective focal length f of the camera lens group meet the following requirements: TTL/f < 1.00.

12. The camera lens group of claim 10, wherein: the effective focal length f of the image pickup lens group and the effective focal length f1 of the first lens meet: 1.00< f/f1< 3.00.

13. The camera lens group of claim 10, wherein: the central thickness CT1 of the first lens on the optical axis and the air interval T12 of the first lens and the second lens on the optical axis satisfy that: 1.00< CT1/T12< 9.00.

14. The imaging lens group of claim 10, wherein the radius of curvature R5 of the object-side surface of the third lens element and the radius of curvature R4 of the image-side surface of the second lens element satisfy: 0.50< R5/R4< 2.00.

15. The image capturing lens assembly of claim 10, wherein: the maximum effective radius DT11 of the object side surface of the first lens and the maximum effective radius DT12 of the image side surface of the first lens meet the following condition: 19.00< (DT11+ DT12)/(DT11-DT12) < 32.00.

16. The camera lens group of claim 10, wherein: the axial distance SAG11 between the intersection point of the object side surface of the first lens and the optical axis and the effective radius peak of the object side surface of the first lens and the axial distance SAG31 between the intersection point of the object side surface of the third lens and the optical axis and the effective radius peak of the object side surface of the third lens satisfy the following conditions: 1.00< SAG11/SAG31< 5.00.

17. The image capturing lens assembly of claim 10, wherein: the central thickness CT4 of the fourth lens on the optical axis and the air interval T34 of the third lens and the fourth lens on the optical axis satisfy that: 2.00< CT4/T34< 14.00.

18. The camera lens group of claim 10, wherein: the edge thickness ET1 of the first lens and the edge thickness ET2 of the second lens satisfy: 1.00< ET1/ET2< 3.50.