CN213987001U - Imaging lens, imaging device, and electronic apparatus - Google Patents

Abstract

The present disclosure relates to an imaging lens, an imaging device, and an electronic apparatus, which are used to maintain a good resolution capability during focusing from infinity to a close range. The image pickup lens comprises a first lens group and a second lens group in sequence from an object side to an image side; the first lens group comprises N lenses, and the N lenses comprise at least two aspheric lenses; in the direction from the object side to the image side, a first lens in the first lens group is a first lens, and an Nth lens in the first lens group is a second lens; the first lens is an aspheric lens with positive focal power, and the second lens is an aspheric lens with focal power; the second lens group includes at least one lens having optical power; during focusing from infinity to close range, the air space between the first lens group and the second lens group changes. The technical scheme of the disclosure can keep good resolving power in the process of focusing from infinity to a close distance.

Description

Imaging lens, imaging device, and electronic apparatus

Technical Field

The present disclosure relates to an image pickup lens, an image pickup apparatus, and an electronic device, and more particularly, to an image pickup lens and an image pickup apparatus suitable for an electronic device such as a mobile terminal.

Background

In the related art, with the trend of the camera of the intelligent electronic device toward high pixel development, the image plane of the image sensor is larger and larger, and under the limitation of size, the ratio of total optical length (TTL) to the effective image circle diameter of the image plane is lower and lower, which shows the trend of low back. In order to maintain a balance between the central field of view and the peripheral field of view in terms of optical performance, aspheric lenses having surfaces with at least one point of inflection are often employed in the system, and lenses having greater curvature on either side of the point of inflection are used to improve the petzval, curvature of field, and distortion. However, when the light rays of each field are focused at the object distance at infinity and the object distance at close range, the angle difference between the incident light rays near the inflection point and the lens surface is large, so that the optical path difference of the light rays of each field changes greatly, and when the imaging system maintains good image quality at infinity, the aberration is greatly increased during close-range imaging, and the resolution performance drops greatly.

SUMMERY OF THE UTILITY MODEL

In view of the foregoing problems in the related art, embodiments of the present disclosure provide an imaging lens, an imaging device, and an electronic apparatus, so as to achieve a good resolution capability in a process of focusing from infinity to a close distance.

According to an aspect of the embodiments of the present disclosure, an imaging lens includes, in order from an object side to an image side: a first lens group and a second lens group;

the first lens group comprises N lenses, wherein N is an integer larger than 2, and the N lenses comprise at least two aspheric lenses; in the direction from the object side to the image side, a first lens in the first lens group is a first lens, an Nth lens in the first lens group is a second lens, and the distance between the first lens in the first lens group and the object plane is the smallest; the first lens is an aspheric lens with positive focal power, the surface of the first lens facing the object side is a convex surface, and the second lens is an aspheric lens with focal power;

the second lens group includes at least one lens having optical power;

an air space between the first lens group and the second lens group changes during focusing from infinity to close range;

wherein the focal length of the first lens group is f1, the focal length of the image pickup lens during focusing at infinity is f, and the focal length of the first lens group and the focal length of the image pickup lens satisfy the following relation:

0.5<f1/f<1.5。

in one embodiment, the first lens group moves toward the object side along the optical axis during focusing from infinity to close range, the position of the second lens group is fixed, and the air space between the first lens group and the second lens group at the time of close range focusing is larger than the air space between the first lens group and the second lens group at the time of focusing at infinity.

In one embodiment, the first lens group moves toward the object side along the optical axis and the second lens group moves toward the image side along the optical axis during focusing from infinity to close range, and an air space between the first lens group and the second lens group at the close range is larger than that at the infinity.

In one embodiment, the first lens group moves toward the object side along the optical axis and the second lens group moves toward the object side along the optical axis during focusing from infinity to close range, and an air space between the first lens group and the second lens group at the time of close range focusing is larger than an air space between the first lens group and the second lens group at the time of focusing at infinity.

In one embodiment, the distance between the vertex of the surface of the first lens, which faces the object side, and the image plane on the optical axis is TTL, the effective image height is IH, and the distance between the vertex of the surface of the first lens, which faces the object side, and the image plane on the optical axis and the effective image height satisfy the following relation:

1.0<TTL/IH<2.0。

in one embodiment, the focal length of the first lens is f L1, and the focal length of the first lens and the focal length of the image pickup lens in focusing at infinity satisfy the following relation:

0.5<fL1/f<2.0。

in one embodiment, an air interval variation between the first lens group and the second lens group is d, and the following relation is satisfied between the air interval variation and a focal length of the first lens group:

0<d/f1<0.5，

the air interval variation is an absolute value of a difference between an air interval between the first lens group and the second lens group at the time of infinity focusing and an air interval between the first lens group and the second lens group at the time of close-range focusing.

In one embodiment, a focal length of the second lens is fL2, a focal length of the second lens group is f2, and the focal length of the second lens group satisfy the following relation:

|fL2/f2|<5.0。

in one embodiment, the abbe number of the first lens is Vd1, the refractive index of the first lens is Nd1, and the abbe number of the first lens and the refractive index of the first lens satisfy the following relation:

30.0<Vd1/Nd1<40.0。

in one embodiment, the distance between the vertex of the surface of the first lens, which faces the object side, and the image plane on the optical axis is TTL, and the distance between the vertex of the surface of the first lens, which faces the object side, and the image plane on the optical axis and the focal length of the imaging lens at infinity in focusing satisfy the following relation:

1.00<TTL/f<5.00。

according to another aspect of the embodiments of the present disclosure, there is provided an image pickup apparatus including an image sensor and the above-mentioned image pickup lens, the image sensor being located at an image plane of the image pickup lens.

According to another aspect of the embodiments of the present disclosure, an electronic apparatus is provided, which includes an apparatus body and the above-mentioned image pickup device, and the image pickup device is mounted on the apparatus body.

The technical scheme provided by the embodiment of the disclosure can have the following beneficial effects: as the camera lens comprises a first lens group and a second lens group from the object side to the image side in sequence, the first lens group comprises N lenses, wherein, the N lenses comprise at least two aspheric lenses, in the direction from the object side to the image side, the first lens in the first lens group is a first lens, the Nth lens is a second lens, the first lens is an aspheric lens with positive focal power, the surface of the first lens facing the object side is a convex surface, the second lens is an aspheric lens with focal power, the second lens group comprises at least one lens with focal power, therefore, the camera lens can be matched with the second lens group through the first lens group, during focusing from infinity to close range, the aberration variation caused by the first lens group and the aberration variation caused by the second lens group are allowed to compensate each other, thereby maintaining good resolving power during focusing from infinity to close range. Further, the focal length of the first lens group and the focal length of the image pickup lens satisfy the relation 0.50< f1/f <1.50, and therefore, a balance between total optical length (TTL) and optical performance can be secured.

It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the disclosure.

Drawings

The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the invention and together with the description, serve to explain the principles of the invention.

Fig. 1 is a schematic configuration diagram of an imaging lens shown according to an exemplary embodiment.

FIG. 2 is a graph illustrating spherical aberration, according to an exemplary embodiment.

Fig. 3 is a schematic diagram illustrating astigmatic field curvature according to an exemplary embodiment.

Fig. 4 is a distortion plot shown in accordance with an example embodiment.

Fig. 5 is a schematic configuration diagram of an imaging lens shown according to another exemplary embodiment.

FIG. 6 is a graph illustrating spherical aberration, according to another exemplary embodiment.

Fig. 7 is a schematic view illustrating an astigmatic field curvature according to another exemplary embodiment.

Fig. 8 is a distortion plot shown in accordance with another exemplary embodiment.

Fig. 9 is a schematic configuration diagram of an imaging lens shown according to another exemplary embodiment.

FIG. 10 is a graph illustrating spherical aberration, according to another exemplary embodiment.

Fig. 11 is a schematic view illustrating an astigmatic field curvature according to another exemplary embodiment.

Fig. 12 is a distortion plot shown in accordance with another exemplary embodiment.

Fig. 13 is a schematic configuration diagram of an imaging lens shown according to another exemplary embodiment.

FIG. 14 is a graph illustrating spherical aberration, according to another exemplary embodiment.

Fig. 15 is a schematic view illustrating an astigmatic field curvature according to another exemplary embodiment.

Fig. 16 is a distortion plot shown in accordance with another exemplary embodiment.

Fig. 17 is a schematic configuration diagram of an imaging lens shown according to another exemplary embodiment.

FIG. 18 is a graph illustrating spherical aberration, according to another exemplary embodiment.

Fig. 19 is a schematic view illustrating an astigmatic field curvature according to another exemplary embodiment.

Fig. 20 is a distortion plot shown in accordance with another exemplary embodiment.

Detailed Description

Reference will now be made in detail to the exemplary embodiments, examples of which are illustrated in the accompanying drawings. When the following description refers to the accompanying drawings, like numbers in different drawings represent the same or similar elements unless otherwise indicated. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with the present invention. Rather, they are merely examples of apparatus and methods consistent with certain aspects of the invention, as detailed in the appended claims.

Fig. 1 is a schematic configuration diagram of an imaging lens 100 according to an exemplary embodiment. As shown in fig. 1, the imaging lens 100 includes, in order from an object side to an image side: a first lens group 11 and a second lens group 12.

In the present embodiment, as shown in fig. 1, the first lens group 11 includes N lenses, where N is an integer greater than 2. The N lenses include at least two aspherical lenses, i.e., the first lens group 11 includes at least two aspherical lenses.

In this embodiment, N may be 7, i.e., the first lens group 11 includes seven lenses, which are lenses 111, 112, 113, 114, 115, 116, and 117, respectively.

As shown in fig. 1, in the present embodiment, the first lens group 11 includes, in order from an object side to an image side: in a direction Z from the object side to the image side, the first lens in the first lens group 11 is the first lens 111, the second lens is the third lens 113, the third lens is the fourth lens 114, the fourth lens is the fifth lens 115, the fifth lens is the sixth lens 116, the sixth lens is the seventh lens 117, and the seventh lens is the second lens 112. Wherein, the distance between the first lens 111 and an object plane (not shown) in the first lens group 11 is the smallest, and the distance between the first lens 111 and the image plane 131 is the largest.

As shown in fig. 1, in the present embodiment, the first lens 111 includes a first surface 1111 facing an object side and a second surface 1112 facing an image side, the third lens 113 includes a third surface 1131 facing the object side and a fourth surface 1132 facing the image side, the fourth lens 114 includes a fifth surface 1141 facing the object side and a sixth surface 1142 facing the image side, the fifth lens 115 includes a seventh surface 1151 facing the object side and an eighth surface 1152 facing the image side, the sixth lens 116 includes a ninth surface 1161 facing the object side and a tenth surface 1162 facing the image side, the seventh lens 117 includes an eleventh surface 1171 facing the object side and a twelfth surface 1172 facing the image side, and the second lens 112 includes a thirteenth surface 1121 facing the object side and a fourteenth surface 1122 facing the image side.

In this embodiment, the first lens 111 is an aspheric lens with positive refractive power, and a first surface 1111 of the first lens 111 facing the object side is a convex surface. The third lens 113 has negative power. The fourth lens 114 has positive optical power. The fifth lens 115 has positive optical power. The sixth lens 116 has a negative power. The seventh lens 117 has positive optical power. The second lens 112 is an aspherical lens having negative power.

In the present embodiment, the curve equation of the aspheric surfaces of the first lens 111 and the second lens 112 is as follows:

where X is the sag of the curved surface parallel to the optical axis 14, c is the curvature at the extreme point of the curved surface, r is the perpendicular distance between the point on the aspheric surface and the optical axis 14, k is the conic constant, and A3 to a30 are aspheric coefficients.

As shown in fig. 1, in the present embodiment, the second lens group 12 includes one eighth lens 121, and the eighth lens 121 has negative power. The eighth lens 121 includes a fifteenth surface 1211 facing the object side and a sixteenth surface 1212 facing the image side.

In the present embodiment, the air space between the first lens group 11 and the second lens group 12 changes during focusing from infinity to close distance. The air space is the distance between two adjacent lenses or lens groups on the optical axis. In the present embodiment, during focusing from infinity to close range, the first lens group 11 and the second lens group 12 move along the optical axis 14, respectively. Specifically, in the process of focusing from infinity to close range, the first lens group 11 moves to the object side along the optical axis 14, the second lens group 12 moves to the image side along the optical axis 14, and the air space between the first lens group 11 and the second lens group 12 in close range focusing is larger than the air space between the first lens group 11 and the second lens group 12 in infinity focusing, for example, the air space between the first lens group 11 and the second lens group 12 may be gradually increased, but is not limited thereto. In the process of focusing, the first lens group 11 and the second lens group 12 move mutually, so that the degree of freedom can be increased, and the performance of near distance can be improved.

In this embodiment, the focal length of the first lens group 11 is f1, the focal length of the imaging lens 100 in focusing at infinity is f, and the focal length of the first lens group 11 and the focal length of the imaging lens 100 satisfy the following relation:

0.5<f1/f<1.5 (2)

this relation (2) controls the power distribution between the first lens group 11 and the second lens group 12, contributing to balance the relationship of improving the optical performance and shortening the optical total length. When the value of f1/f is greater than or equal to 1.5, the focal power of the first lens group 11 is too small, the spherical aberration is under-compensated, the total optical length (TTL) is too long, and the volume of the imaging lens 100 is large. When the value of f1/f is less than or equal to 0.5, the focal power of the first lens group 11 is too large, the optical power is too compensated, the emergent rays are converged rapidly, and the closer the emergent principal point (exit pupil position) is to the image side, the more the rays in the peripheral field are favorably dispersed and the aberration compensation is unfavorable. Therefore, when the focal length of the first lens group 11 and the focal length of the image pickup lens 100 satisfy the above-described relational expression (2), the power of the first lens group 11 can be controlled within a reasonable range, ensuring a balance between the total optical length (TTL) and each optical performance.

For convenience of description, hereinafter, "the focal length of the imaging lens 100 at the time of focusing at infinity" may be simply referred to as "the focal length of the imaging lens 100".

The focal length of the first lens group 11 and the focal length of the image capturing lens 100 may satisfy the following conditions:

0.7<f1/f<1.3 (3)

the focal length of the first lens group 11 and the focal length of the image pickup lens 100 may further satisfy the following condition:

0.8<f1/f<1.1 (4)

in this embodiment, since the image pickup lens 100 includes the first lens group 11 and the second lens group 12 in order from the object side to the image side, the first lens group 11 includes at least two aspherical lenses, and in the direction Z directed from the object side to the image side, the first lens in the first lens group 11 is the first lens 111, the seventh lens is the second lens 112, the first lens 111 is an aspherical lens having positive power, the first surface 1111 of the first lens 111 directed toward the object side is a convex surface, the second lens 112 is an aspherical lens having power, and the second lens group 12 includes the eighth lens 121 having negative power, the image pickup lens 100 can compensate for the aberration variation caused by the first lens group 11 and the aberration variation caused by the second lens group 12 with each other through the first lens group 11 and the second lens group 12 in the process from infinity distance to the focus, thereby maintaining good resolution during focusing from infinity to close range. Further, the focal length of the first lens group 11 and the focal length of the image pickup lens 100 satisfy the relation 0.5< f1/f <1.5, and therefore, a balance between the total optical length (TTL) and the optical performance can be secured.

In this embodiment, the distance between the vertex of the first surface 1111, facing the object side, of the first lens 111 and the image plane 131 on the optical axis 14 is TTL, the effective image height (i.e., half of the total diagonal length of the effective imaging area of the image sensor) is IH, and the distance between the vertex of the first surface 1111, facing the object side, of the first lens 111 and the image plane 131 on the optical axis 14 (TTL) and the effective Image Height (IH) satisfy the following relation:

1.0<TTL/IH<2.0 (5)

when the value of TTL/IH is greater than or equal to 2.0, the total optical length is too large, and the size of the imaging lens 100 is too large. When the value of TTL/IH is less than or equal to 1.0, the total optical length is too small, the edge field performance is poor, and a dark corner may occur. Therefore, when the total optical length (TTL) and the effective Image Height (IH) satisfy the above-described relational expression (5), the size of the imaging lens 100 can be controlled within a reasonable range, and miniaturization of the imaging apparatus can be reasonably achieved.

In the present embodiment, the focal length of the first lens 111 is f L1, and the focal length of the first lens 111 and the focal length of the imaging lens 100 satisfy the following relation:

0.5<fL1/f<2.0 (6)

the relational expression (6) controls the light converging ability of the first lens 111, which contributes to shortening the total optical length to achieve the purpose of reducing the size of the image pickup apparatus. When the value of fL1/f is greater than or equal to 2.0, the focal power of the first lens 111 is small, the converging ability of the principal rays is insufficient, the total optical length becomes large, and the entire size of the imaging lens 100 becomes large. When the value of fL1/f is less than or equal to 0.5, the power of the first lens 111 is too large, the incident light is converged and then diverged, the variation of divergence angle of marginal light rays in the rear half is large, the aberration is large, and it is not easy to correct. Therefore, when the focal length of the first lens 111 and the focal length of the imaging lens 100 satisfy the above-mentioned relational expression (6), the focal length of the first lens 111 can be controlled within a reasonable range, and the entire focal length is mainly concentrated on the first lens 111, which is beneficial to shortening the total optical length of the imaging lens 100 and further reducing the size of the imaging lens 100. The focal length of the first lens 111 and the focal length of the imaging lens 100 may satisfy the following conditions: 0.6< fL1/f < 1.5. The focal length of the first lens 111 and the focal length of the imaging lens 100 may further satisfy the following condition: 0.7< fL1/f < 1.2.

In the present embodiment, the following relationship is satisfied between the air interval variation d between the first lens group 11 and the second lens group 12 and the focal length of the first lens group 11:

0<d/f1<0.5 (7)

this relational expression (7) controls the relative movement amount between the first lens group 11 and the second lens group 12, balancing the relationship between the optical total length and the near performance improvement. The air interval variation is an absolute value of a difference between an air interval between the first lens group 11 and the second lens group 12 in infinity focusing and an air interval between the first lens group 11 and the second lens group 12 in close focusing.

When the value of d/f1 is greater than or equal to 0.5, the air space between the first lens group 11 and the second lens group 12 is large, and when the value of d/f1 is equal to 0, the air space between the first lens group 11 and the second lens group 12 is not relatively changed, and the performance of an infinite object distance and a close distance cannot be balanced. Wherein, the following condition can be satisfied between the air interval d between the first lens group 11 and the second lens group 12 and the focal length of the first lens group 11: 0< d/f1< 0.3. The following condition may be further satisfied between the air interval d between the first lens group 11 and the second lens group 12 and the focal length of the first lens group 11: 0< d/f1< 0.2.

In the present embodiment, the focal length of the second lens 112 is fL2, the focal length of the second lens group 12 is f2, and the focal length of the second lens 112 and the focal length of the second lens group 12 satisfy the following relation:

|fL2/f2|<5.0 (8)

the relation (8) controls the power distribution relation between the second lens 112 and the second lens group 12, the second lens group 12 shares part of the power of the second lens 112 which originally has the functions of shortening the back focus and improving the peripheral field performance, and meanwhile, the second lens group 12 moves along the optical axis 14, which is beneficial to balancing the requirements of improving the near-distance performance and shortening the back focus. The second lens 112 may be either a positive or negative lens. In most cases, the focal length of the second lens 112 is the same sign (same sign, both positive or both negative) as the focal length of the second lens group 12. Of course, in other embodiments, the position of the second lens group 12 may also be fixed.

When the value of | fL2/f2| is greater than or equal to 5.0, fL2 has a large focal length and a small focal power, and the second lens group 12 has a large focal power and plays a major role in aberration compensation. During infinity to close-distance focusing, when the second lens group 12 is moved along the optical axis 14, the relative moving amount of the first lens group 11 decreases, and the moving amount of the second lens group 12 relatively increases. Meanwhile, the curvature change near the point of inflection of the sixteenth surface 1212 facing the image side of the eighth lens 121 in the second lens group 12 also increases. If the position of the second lens group 12 is fixed during focusing, the propagation optical path difference of the upper and lower light rays in each field of view in the process of focusing from infinity to close range becomes large, which is manifested as large aberration variation such as coma (coma), astigmatism, distortion, magnification chromatic aberration, and the like, and large drop of MTF (Modulation Transfer Function).

Therefore, when the focal length of the second lens 112 and the focal length of the second lens group 12 satisfy the above-mentioned relation (8), the second lens group 12 can share the optical power of the first lens group 11, particularly share the optical power of the lens (i.e. the second lens 112) closest to the image plane 131 in the first lens group 11, and reduce the curvature variation of the inflection point on the curved surface of the lens (i.e. the second lens 112) closest to the image plane 131, thereby reducing the variation of the optical performance during focusing and improving the performance at a close distance.

Wherein, the focal length of the second lens element 112 and the focal length of the second lens element 12 satisfy the following condition: 0.03< | fL2/f2| < 4.0. The focal length of the second lens 112 and the focal length of the second lens group 12 can further satisfy the following condition: 0.05< | fL2/f2| < 3.6.

In the present embodiment, the abbe number of the first lens 111 of the imaging lens is Vd1, the refractive index of the first lens 111 is Nd1, and the abbe number of the first lens 111 and the refractive index of the first lens 111 satisfy the following relational expression:

30.0<Vd1/Nd1<40.0 (9)

the relation (9) controls the material selection of the first lens 111, improving the compensation of the on-axis chromatic aberration and spherical aberration. When the ratio is greater than or equal to 40.0, the refractive index of the first lens 111 is low, which is not favorable for compensating spherical aberration, and when the ratio is less than or equal to 30.0, the abbe number of the first lens 111 is low, which is not favorable for compensating on-axis chromatic aberration. Wherein, the abbe number of the first lens 111 and the refractive index of the first lens 111 can satisfy the following condition: 32.0< Vd1/Nd1< 38.0. The abbe number of the first lens 111 and the refractive index of the first lens 111 may further satisfy the following condition: 33.0< Vd1/Nd1< 37.0.

In this embodiment, the distance between the vertex of the surface of the first lens 111 facing the object side and the image plane 131 on the optical axis 14 and the focal length of the imaging lens 100 at infinity satisfy the following relation:

1.0<TTL/f<5.0 (10)

the relation (10) controls the relation between the total optical length and the focal length of the imaging lens 100 to select a reasonable total optical length, thereby satisfying the demand for miniaturization of the imaging apparatus. The distance between the vertex of the surface of the first lens 111 facing the object side of the imaging lens 100 and the image plane 131 on the optical axis 14 and the focal length of the imaging lens 100 may satisfy the following condition: 1.0< TTL/f < 3.0. The distance between the vertex of the surface of the first lens 111 facing the object side of the imaging lens 100 and the image plane 131 on the optical axis 14 and the focal length of the imaging lens may further satisfy the following condition: 1.0< TTL/f < 2.0.

In this embodiment, as shown in fig. 1, the imaging lens 100 may further include a filter element 15, where the filter element 15 is located between the second lens group 12 and the image plane 131, and does not affect the focal length of the imaging lens 100. The filter element 15 may include, but is not limited to, a low pass filter, an infrared cut filter, a micro lens, and an RGB dichroic filter.

In this embodiment, the camera lens 100 may further include an aperture for controlling the amount of light that passes through the camera lens 100 and enters the image plane 131. The aperture value of the imaging lens 100 is Fno, Fno is 2.30, and the focal length (f) of the imaging lens 100 is 7.90.

In this embodiment, the image pickup lens 100 may further include at least one diaphragm, such as an aperture diaphragm, a flare diaphragm, or a field diaphragm, for reducing stray light. The stop may be located on a side of the first lens group 11 toward the object side.

In this embodiment, the focal length f1 of the first lens group 11 is 7.76, and the focal length f2 of the second lens group 12 is-195.79. The value of f1/f is 0.98, the value of TTL/IH is 1.45, the value of fL1/f is 0.91, the value of d/f1 is 0.18, | fL2/f2| is 0.06, the value of Vd1/Nd1 is 36.3, and the value of TTL/f is 1.31.

In the present embodiment, the configuration data of the imaging lens 100 is shown in table 1, the aspherical data is shown in table 2, where k is a cone coefficient in an aspherical curve equation, A3 to a18 are aspherical coefficients of 4 th to 18 th orders on the surfaces, and the focal length data of each lens is shown in table 3.

TABLE 1

Num	R’	thi	Nd	Vd	Radius of
						1(STO)	Plane surface	-0.38
2	4.005	0.72	1.543	56.0	1.7
						3	-237.079	0.10
4	4.042	0.36	1.632	24.0	1.6
						5	2.726	0.50
6	-19.416	0.63	1.543	56.0	1.5
						7	-6.735	0.57
8	-6.134	0.59	1.543	56.0	1.8
						9	-5.641	0.80
10	-2.817	0.32	1.667	19.2	2.2
						11	-4.439	0.10
12	-3.162	0.74	1.543	56.0	2.8
						13	-1.862	0.35
14	4.197	1.11	1.534	55.7	5.0
						15	2.213	d15
16	-446.274	0.70	1.566	37.4	5.8
						17	148.869	d17
18	Plane surface	0.21	1.516	64.2	7.0
						19	Plane surface	0.52
20	Image plane	-

Where Num is an ordinal number of surfaces arranged in order from the object side to the image side, for example, the 1 st surface is a seventeenth surface (not shown) of the Stop (STO), the 2 nd surface is the first surface 1111 of the first lens 111, the 3 rd surface is the second surface 1112, … … of the first lens 111, the 14 th surface is the thirteenth surface 1121 of the second lens 112, the 15 th surface is the fourteenth surface 1112 of the second lens 112, the 16 th surface is the fifteenth surface 1211 of the eighth lens 121, the 17 th surface is the sixteenth surface 1212 of the eighth lens 121, the 18 th surface is the eighteenth surface 151 of the filter element 15 facing the object side, the 19 th surface is the nineteenth surface 152 of the filter element 15 facing the image side, and the 20 th surface is the image plane 131. R' is curvature, thi is thickness on the optical axis 14, Nd is refractive index, Vd is abbe number, d15 is air space between the 15 th surface and the 16 th surface, that is, between the first lens group 11 and the second lens group 12, d17 is air space between the 17 th surface and the 18 th surface, that is, between the second lens group 12 and the eighteenth surface 151, the radius is half of the aperture of the lens, and the plane is an air surface. A space indicates that there is no corresponding data.

TABLE 2

Num	K	A3	A4	A5	A6
						2	3.01889E+00		-5.70983E-03		-1.17554E-03
3	1.50000E+01		-1.96908E-03		2.59522E-03
						4	2.78949E+00		-2.66254E-02		2.90687E-03
5	4.92274E-01		-2.61884E-02		1.31550E-03
						6	1.40069E+01		-5.10454E-03		-1.59333E-03
7	1.16377E+01		-8.56486E-03		-1.71535E-03
						8	9.10606E+00		-1.56990E-02		-2.25898E-03
9	4.84411E+00		-1.06696E-02		-6.82839E-04
						10	5.09981E-01	-7.46574E-03	-1.21894E-02	1.12429E-03	1.16897E-03
11	8.77278E-01	-2.55539E-02	-9.84962E-03	2.70470E-03	2.88956E-04
						12	-4.72169E+00	-4.13285E-02	1.43266E-02	1.23020E-03	-1.43470E-03
13	-3.17194E+00	-4.22734E-02	6.71859E-03	1.85055E-03	5.44784E-04
						14	-7.14613E-01	-3.04334E-02	-5.87092E-03	3.61378E-04	4.58818E-04
15	-7.07016E+00	1.08010E-02	-1.82434E-02	4.54043E-03	-2.34127E-04
						16	9.90000E+01		3.39060E-03		-9.59427E-04
17	0.00000E+00		3.41735E-03		-7.08980E-04

TABLE 2

TABLE 2

Num

A13

A14

A15

A16

A17

A18

2

8.16744E-06

-4.37148E-06

0.00000E+00

3

-5.51882E-06

0.00000E+00

0.00000E+00

4

1.38976E-05

-6.76230E-06

0.00000E+00

5

1.50101E-05

-3.13495E-06

0.00000E+00

6

8.10138E-07

-5.05539E-06

0.00000E+00

7

-5.79425E-06

1.93324E-06

0.00000E+00

8

4.19015E-06

1.88127E-07

0.00000E+00

9

8.78525E-07

-2.59754E-07

0.00000E+00

10

-9.22831E-07

-5.64015E-08

1.20095E-07

7.60767E-08

1.90789E-08

1.45405E-09

11

-8.28190E-08

-2.09069E-08

-1.29533E-08

-4.58154E-09

-1.87881E-09

-1.81806E-09

12

1.61648E-07

4.20577E-08

7.27003E-09

-4.93412E-10

-1.06413E-09

-5.77179E-10

13

-3.64097E-09

2.20801E-09

1.29026E-09

4.20396E-10

4.44238E-11

-3.52193E-11

14

-1.19237E-10

-1.45713E-11

5.45309E-12

-9.14195E-13

-1.06318E-14

3.37733E-15

15

-1.99328E-10

1.34751E-11

2.59770E-12

1.32398E-12

5.11284E-14

-6.28246E-14

16

-8.47157E-09

1.22099E-10

-7.58379E-13

17

-2.68282E-09

3.20050E-11

-1.65995E-13

TABLE 3

Wherein Element is the ordinal number of the lenses arranged from the object side to the image side, and Start surface is the ordinal number of the initial surface of the lens. The starting surface is the surface close to the object.

In the present embodiment, as shown in table 3, the focal length of the first lens 111 is 7.22, the focal length of the second lens 112 is-10.84, the focal length of the third lens 113 is-14.66, the focal length of the fourth lens 114 is 18.57, the focal length of the fifth lens 115 is 90.33, the focal length of the sixth lens 116 is-12.37, the focal length of the seventh lens 117 is 6.91, and the focal length of the eighth lens 121 is-195.79.

In this embodiment, when the subject distance is at Infinity (INF) and near (100 mm), the data of d15 and d17 are shown in table 4.

TABLE 4

	Infinity	Short distance
			Subject distance	INF	100mm
d15	0.93	2.40
			d17	1.10	0.40

As can be seen from table 4, when the subject distance is at Infinity (INF), d15 is 0.93, d17 is 1.10, and when the subject distance is at close distance (100 mm), d15 is 2.40, and d17 is 0.40.

In the present embodiment, a SPHERICAL aberration (SPHERICAL aberration) graph of the imaging lens 100 is shown in fig. 2, an astigmatic field curvature (ASTIGMATIC FIELD CURVES) graph is shown in fig. 3, and a DISTORTION (aberration) graph is shown in fig. 4. In fig. 2, the horizontal axis is the FOCUS (FOCUS) offset in millimeters (MILLIMETERS) and the vertical axis is the on-axis distance of incidence in millimeters as light enters the lens. FIG. 2 includes a spherical aberration curve for incident light having a wavelength of 656.3000NM (nanometers), a spherical aberration curve for incident light having a wavelength of 587.6000NM, and a spherical aberration curve for incident light having a wavelength of 486.0000 NM. In fig. 3, the horizontal axis represents the focus offset in mm, and the vertical axis represents the image height (IMG HT) in mm. FIG. 3 includes a curve T of tangential field curvature of incident light having a wavelength of 587.6000NM and a curve S of sagittal field curvature of incident light having a wavelength of 587.6000 NM. In fig. 4, the distortion rate is plotted on the horizontal axis and the image height is plotted on the vertical axis in mm.

In this embodiment, the overall image quality of the camera lens 100 can be greatly improved, and the range of imaging is expanded. When the electronic zooming is performed, better image quality and close-range effect can be obtained.

In the present embodiment, by increasing the power matching of the second lens group 12 and the first lens group 11, the reverse difference on the surface of the lens having an inflection point in the first lens group 11 is reduced, thereby reducing the variation of aberrations such as curvature of field and the like and the drop of MTF during infinity to close-distance focusing. Here, the decrease in the MTF drop means that the variation amount of the MTF decreases. In addition, the position of the second lens group 12 is slightly changed in cooperation with the first lens group 11 during focusing, so that a high-quality and low-back lens matched with a large-size image sensor is realized.

Fig. 5 is a schematic configuration diagram of the imaging lens 100 shown according to another exemplary embodiment. In the present embodiment, the first lens group 11 includes seven lenses, and the second lens group 12 includes one lens.

As shown in fig. 5, in the present embodiment, the first lens group 11 includes, in order from an object side to an image side: a first lens 111, a third lens 113, a fourth lens 114, a fifth lens 115, a sixth lens 116, a seventh lens 117, and a second lens 112. The first lens 111 is an aspherical lens having positive refractive power. The third lens 113 has negative power. The fourth lens 114 has positive optical power. The fifth lens 115 has positive optical power. The sixth lens 116 has a negative power. The seventh lens 117 has positive power, and the second lens 112 is an aspherical lens having negative power.

As shown in fig. 5, in the present embodiment, the second lens group 12 includes one eighth lens 121, and the eighth lens 121 has negative power.

In the present embodiment, during focusing from infinity to close range, the first lens group 11 moves toward the object side along the optical axis 14, and the second lens group 12 moves toward the image side, and the air space between the first lens group 11 and the second lens group 12 during close range focusing is larger than the air space between the first lens group 11 and the second lens group 12 during focusing at infinity, for example, the air space between the first lens group 11 and the second lens group 12 may gradually increase, but is not limited thereto.

It should be noted that, in other embodiments, when the signs of the focal length of the first lens group 11 and the focal length of the second lens group 12 are both positive and relatively close, during focusing from infinity to close range, the first lens group 11 and the second lens group 12 may both move along the optical axis 14, and the air space between the first lens group 11 and the second lens group 12 may decrease.

It should be noted that, in other embodiments, the number of lenses in the first lens group 11 is not limited to 7 provided in the embodiments of the present disclosure, and the number of lenses in the second lens group 12 is not limited to one provided in the embodiments of the present disclosure, and the number of lenses in the first lens group 11 and the number of lenses in the second lens group 12 may be set according to actual requirements.

In the present embodiment, Fno is 2.30, and the focal length of the imaging lens 100 is 7.9. The focal length f1 of the first lens group 11 is 7.76, and the focal length f2 of the second lens group 12 is-71.77. The value of f1/f is 0.98, the value of TTL/IH is 1.45, the value of fL1/f is 0.92, the value of d/f1 is 0.18, | fL2/f2| is 0.18, the value of Vd1/Nd1 is 36.3, and the value of TTL/f is 1.31.

In the present embodiment, the configuration data of the imaging lens 100 is shown in table 5, the aspherical data is shown in table 6, and the focal length data of each lens is shown in table 7. Wherein, the meanings of the letters in tables 5 to 7 are the same as those of the letters in tables 1 to 3, and are not repeated herein.

TABLE 5

Please see the following pages in tables 6 and 7.

In the present embodiment, a spherical aberration graph of the imaging lens 100 is shown in fig. 6, an astigmatic field curvature diagram is shown in fig. 7, and a distortion graph is shown in fig. 8. FIG. 6 includes a spherical aberration curve of incident light having a wavelength of 656.3000NM, a spherical aberration curve of incident light having a wavelength of 587.6000NM, and a spherical aberration curve of incident light having a wavelength of 486.0000 NM. FIG. 7 includes a curve T of tangential field curvature of incident light having a wavelength of 587.6000NM and a curve S of sagittal field curvature of incident light having a wavelength of 587.6000 NM.

TABLE 6

Num	K	A3	A4	A5	A6
						2	2.87701E+00		-5.23091E-03		-1.05197E-03
3	-9.90000E+01		-2.74606E-03		2.51284E-03
						4	3.35616E+00		-2.90811E-02		2.37167E-03
5	5.32709E-01		-2.72988E-02		1.45806E-03
						6	-2.14589E+01		-4.80725E-03		-1.47926E-03
7	1.00801E+01		-8.79479E-03		-1.79078E-03
						8	9.69174E+00		-1.69482E-02		-2.44443E-03
9	5.46142E+00		-1.06545E-02		-7.13091E-04
						10	4.63385E-01	-8.30563E-03	-1.41825E-02	1.73713E-03	1.75452E-03
11	5.21495E-01	-3.04138E-02	-7.33205E-03	2.90075E-03	1.22035E-04
						12	-6.23055E+00	-3.57597E-02	1.33114E-02	9.10105E-04	-1.49093E-03
13	-3.01904E+00	-3.62900E-02	6.23193E-03	1.83743E-03	5.64632E-04
						14	-4.25468E-01	-2.82706E-02	-4.86635E-03	5.66725E-04	4.77496E-04
15	-9.77910E+00	8.66230E-03	-1.67742E-02	4.48342E-03	-2.79686E-04
						16	9.89840E+01		2.23081E-03		-9.59427E-04
17	1.30507E+01		2.40594E-03		-7.01411E-04

TABLE 6 continuation

Num

A7

A8

A9

A10

A11

A12

2

-1.56086E-04

-1.26665E-04

2.19747E-05

3

-1.57028E-03

4.65873E-04

-7.04456E-05

4

-5.34241E-04

-1.33231E-04

-1.49360E-05

5

-3.42315E-04

2.98357E-05

-7.15916E-05

6

-2.84356E-04

-2.14850E-04

5.83123E-05

7

-7.62522E-05

1.24829E-06

-3.90302E-06

8

3.00288E-04

-7.46501E-05

2.45202E-06

9

4.48832E-05

1.89432E-06

-3.05072E-06

10

7.66744E-04

5.44786E-04

1.70488E-06

-3.51191E-05

-1.30757E-05

-7.85470E-06

11

-4.65491E-06

1.97563E-04

-1.19738E-07

-5.43103E-06

-1.01722E-07

-6.01375E-07

12

-9.30668E-05

1.17748E-04

-9.99156E-06

-7.39774E-06

8.94442E-07

5.86190E-07

13

6.59490E-05

-3.48032E-05

-3.01553E-06

3.15876E-07

-2.98792E-07

-7.28226E-08

14

-5.88952E-06

-1.39099E-05

-2.25137E-07

6.18319E-08

-7.93763E-09

3.05891E-09

15

-5.34484E-05

-1.08489E-06

1.22616E-06

1.19517E-07

-3.83728E-09

-2.53921E-09

16

1.11669E-04

-7.76837E-06

3.29479E-07

17

6.57665E-05

-3.68357E-06

1.27094E-07

TABLE 6 continuation

Num

A13

A14

A15

A16

A17

A18

2

8.67256E-06

-4.50875E-06

3

-2.15974E-06

4

1.50722E-05

-5.43149E-06

5

1.57653E-05

-2.81781E-06

6

8.18336E-07

-5.05534E-06

7

-5.75145E-06

2.05333E-06

8

3.81935E-06

1.84439E-07

9

8.32234E-07

-2.76327E-07

10

-7.26091E-07

1.33882E-07

2.05194E-07

9.74222E-08

1.67592E-08

-6.25629E-09

11

-1.78579E-07

-6.18653E-08

-2.58232E-08

-7.48980E-09

-1.98869E-09

-1.59361E-09

12

1.70718E-07

4.22015E-08

6.56232E-09

-8.50845E-10

-1.15212E-09

-5.68398E-10

13

-5.21628E-09

1.79655E-09

1.18398E-09

3.98583E-10

3.93392E-11

-2.84740E-11

14

1.24015E-10

3.42979E-11

1.23259E-11

-3.14124E-13

-1.49143E-13

-6.72039E-14

15

-2.72444E-10

5.55579E-12

1.68426E-12

1.81125E-12

9.09552E-14

-6.55456E-14

16

-8.47157E-09

1.22099E-10

-7.58379E-13

17

-2.68282E-09

3.20359E-11

-1.67137E-13

TABLE 7

In this embodiment, when the subject distance is at Infinity (INF) and near (100 mm), the data of d15 and d17 are shown in table 8.

TABLE 8

	Infinity	Short distance
			Subject distance	INF	100mm
d15	0.92	2.31
			d17	0.90	0.22

As can be seen from table 8, when the subject distance is at Infinity (INF), d15 is 0.92, d17 is 0.90, and when the subject distance is at close distance (100 mm), d15 is 2.31, and d17 is 0.22.

In this embodiment, the overall image quality of the camera lens 100 can be greatly improved, and the range of imaging is expanded. When the electronic zooming is performed, better image quality and close-range effect can be obtained.

Fig. 9 is a schematic configuration diagram of an imaging lens 100 shown according to another exemplary embodiment. In the present embodiment, the seventh lens is included in the first lens group 11, and the second lens group 12 includes one lens.

As shown in fig. 9, in the present embodiment, the first lens group 11 includes, in order from an object side to an image side: a first lens 111, a third lens 113, a fourth lens 114, a fifth lens 115, a sixth lens 116, a seventh lens 117, and a second lens 112. The first lens 111 is an aspherical lens having positive refractive power. The third lens 113 has negative power. The fourth lens 114 has positive optical power. The fifth lens 115 has positive optical power. The sixth lens 116 has a negative power. The seventh lens 117 has positive power, and the second lens 112 is an aspherical lens having negative power.

As shown in fig. 9, in the present embodiment, the second lens group 12 includes one eighth lens 121, and the eighth lens 121 has negative power.

In this embodiment, during focusing from infinity to close range, the first lens group 11 moves toward the object side along the optical axis 14, and the second lens group 12 moves toward the object side, and the air space between the first lens group 11 and the second lens group 12 at the close range focusing is larger than the air space between the first lens group 11 and the second lens group 12 at the infinity focusing, that is, the air space between the first lens group 11 and the second lens group 12 increases.

In the present embodiment, Fno is 2.67, and the focal length of the imaging lens 100 is 8.8. The focal length f1 of the first lens group 11 is 7.93, and the focal length f2 of the second lens group 12 is-15.46. The value of f1/f was 0.9, the value of TTL/IH was 1.45, the value of fL1/f was 0.85, the value of d/f1 was 0.01, | fL2/f2| was 3.54, the value of Vd1/Nd1 was 36.2, and the value of TTL/f was 1.18.

In the present embodiment, the configuration data of the imaging lens 100 is shown in table 9, the aspherical data is shown in table 10, and the focal length data of each lens is shown in table 11. Here, the meanings of the letters in tables 9 to 11 are the same as those of the letters in tables 1 to 3, and are not described again.

TABLE 9

Watch 10

Num

Num

K

A3

A4

A5

A6

2

2*

-3.41826E+00

1.08571E-05

-2.00232E-03

3

3*

8.28845E+01

-4.10975E-03

6.89457E-04

4

4*

1.46563E+00

-1.35651E-02

2.29377E-03

5

5*

5.92109E-01

-1.69495E-02

9.99071E-04

6

6*

-9.90000E+01

-7.70084E-03

1.54492E-03

7

7*

-9.90000E+01

-1.51030E-02

2.52793E-03

8

8*

4.43332E+01

-1.56814E-02

-7.52567E-05

9

9*

1.09245E+01

-7.54304E-03

-6.55550E-04

10

10*

-5.39636E-01

1.73688E-03

9.87087E-04

7.39721E-05

-2.64399E-05

11

11*

-2.85144E+00

-1.09450E-03

-1.56582E-03

2.44875E-04

-1.65387E-05

12

12*

-1.70566E+01

-5.03351E-03

1.52463E-03

1.16790E-04

-9.80556E-05

13

13*

-8.04411E+00

-1.39593E-02

4.87713E-03

1.90211E-04

-6.68276E-05

14

14*

-9.01395E-01

-1.20529E-02

-1.05934E-03

7.59084E-05

3.52576E-05

15

15*

-6.16378E+00

5.70900E-04

-2.64516E-03

4.49069E-04

-2.13997E-05

16

16*

-4.12094E+00

3.84593E-04

-7.89927E-05

17

17*

-9.90000E+01

-1.85238E-03

3.85820E-05

Continuation table 10

Num

A7

A8

A9

A10

A11

A12

2

1.03590E-03

-7.80509E-04

2.22001E-04

3

-1.29162E-03

3.09786E-04

-3.45373E-05

4

-1.31978E-03

1.97775E-04

4.33935E-05

5

-5.54112E-04

-4.81234E-05

2.33114E-06

6

2.19555E-04

-5.87679E-05

7

1.35139E-04

6.16736E-05

8

4.90521E-04

-4.98120E-05

-4.10689E-06

9

1.35813E-04

-5.41996E-06

-6.32175E-06

10

-9.06572E-06

8.96198E-06

-7.61759E-07

-3.81447E-07

-4.95989E-08

-2.70815E-08

11

-4.75146E-06

5.39559E-06

-2.32207E-07

-1.25670E-07

-1.25252E-08

-5.76537E-09

12

-7.61127E-06

1.21454E-06

-7.81405E-07

-1.54809E-07

1.53732E-08

6.46723E-09

13

-1.70130E-05

-2.76846E-06

-6.38392E-09

5.61265E-08

8.89486E-09

1.37884E-09

14

-3.90225E-07

-4.35364E-07

3.28847E-10

1.20853E-09

-7.41946E-11

1.31866E-11

15

-2.46229E-06

-2.07828E-08

2.48197E-08

1.56644E-09

6.54944E-12

-8.65850E-12

16

5.63253E-07

4.12204E-08

2.45471E-10

17

1.56673E-07

-1.92772E-08

-7.14445E-10

Continuation table 10

Num

A13

A14

A15

A16

A17

A18

2

-2.89583E-05

3

-3.13416E-06

4

-1.72635E-05

1.13791E-06

5

9.82380E-06

-2.42597E-06

6

7

8

2.72668E-06

-5.47275E-07

9

5.21120E-07

-1.85515E-08

10

5.53894E-10

5.93847E-10

2.40932E-10

5.40438E-11

-2.70049E-12

-5.09955E-12

11

-9.50498E-10

-1.26469E-10

-8.15120E-12

7.73726E-12

4.72308E-12

1.39016E-12

12

8.23295E-10

-7.72594E-11

-7.50917E-11

-2.06931E-11

-2.33928E-12

8.37928E-13

13

1.99441E-10

1.83695E-11

-6.71998E-13

-5.91625E-13

-1.85510E-13

-4.56180E-14

14

-2.22622E-13

9.62483E-15

1.71640E-14

9.75353E-16

1.76304E-16

2.04054E-17

15

-6.47675E-13

5.21463E-14

3.00945E-15

1.23949E-15

5.94842E-17

-1.97177E-17

16

-1.75498E-11

17

1.80163E-11

TABLE 11

Element	Start surface	Focal length
			1	2	7.51
2	4	-17.30
			3	6	139.27
4	8	22.56
			5	10	-23.79
6	12	16.94
			7	14	-54.83
8	16	-15.53

In this embodiment, when the subject distance is at Infinity (INF) and near (300 mm), the data of d15 and d17 are shown in table 12.

TABLE 12

As can be seen from table 12, when the subject distance is at Infinity (INF), d15 is 1.72, d17 is 0.85, and when the subject distance is at close distance (300 mm), d15 is 1.76, and d17 is 1.04.

In the present embodiment, a spherical aberration graph of the imaging lens 100 is shown in fig. 10, an astigmatic field curvature diagram is shown in fig. 11, and a distortion graph is shown in fig. 12. FIG. 10 includes a spherical aberration curve of incident light having a wavelength of 656.3000NM, a spherical aberration curve of incident light having a wavelength of 587.6000NM, and a spherical aberration curve of incident light having a wavelength of 486.0000 NM. FIG. 11 includes a curve T of tangential field curvature of incident light having a wavelength of 587.6000NM and a curve S of sagittal field curvature of incident light having a wavelength of 587.6000 NM.

In this embodiment, the overall image quality of the camera lens 100 can be greatly improved, and the range of imaging is expanded. When the electronic zooming is performed, better image quality and close-range effect can be obtained.

Fig. 13 is a schematic configuration diagram of an imaging lens 100 according to another exemplary embodiment. In the present embodiment, the seventh lens is included in the first lens group 11, and the second lens group 12 includes one lens.

As shown in fig. 13, in the present embodiment, the first lens group 11 includes, in order from an object side to an image side: a first lens 111, a third lens 113, a fourth lens 114, a fifth lens 115, a sixth lens 116, a seventh lens 117, and a second lens 112. The first lens 111 is an aspherical lens having positive refractive power. The third lens 113 has negative power. The fourth lens 114 has positive optical power. The fifth lens 115 has positive optical power. The sixth lens 116 has a negative power. The seventh lens 117 has positive power, and the second lens 112 is an aspherical lens having positive power.

As shown in fig. 13, in the present embodiment, the second lens group 12 includes one eighth lens 121, and the eighth lens 121 has positive optical power.

In this embodiment, in the process of focusing from infinity to close distance, the first lens group 11 is moved toward the object side along the optical axis 14, the position of the second lens group 12 is fixed, and the air space between the first lens group 11 and the second lens group 12 gradually increases.

In the present embodiment, Fno is 2.87, and the focal length of the imaging lens 100 is 8.8. The focal length f1 of the first lens group 11 is 9.25, and the focal length f2 of the second lens group 12 is 73.95. The value of f1/f was 1.05, the value of TTL/IH was 1.73, the value of fL1/f was 1.11, the value of d/f1 was 0.03, | fL2/f2| was 0.60, the value of Vd1/Nd1 was 35.8, and the value of TTL/f was 1.41.

In the present embodiment, the configuration data of the imaging lens 100 is shown in table 13, the aspherical data is shown in table 14, and the focal length data of each lens is shown in table 15. Here, the meanings of the letters in tables 13 to 15 are the same as those of the letters in tables 1 to 3, and are not described again.

Watch 13

Num	R’	thi	Nd	Vd	Radius of
						1(STO)	Plane surface	-0.11
2	8.268	0.47	1.623	58.2	1.5
						3	-22.951	0.10
4	4.424	0.70	1.650	21.5	1.6
						5	3.072	0.85
6	-2000.000	0.37	1.544	56.0	1.8
						7	-41.001	0.43
8	-93.161	0.82	1.544	56.0	2.2
						9	-9.079	1.05
10	-2.979	0.38	1.635	24.0	2.7
						11	-7.244	0.15
12	-4.584	1.10	1.768	49.2	3.1
						13	-3.386	0.10
14	3.223	1.50	1.535	55.7	5.3
						15	3.120	d15
16	19.811	0.44	1.535	55.7	6.1
						17	39.207	2.34
18	Plane surface	0.21	1.516	64.2	7.0
						19	Plane surface	0.56
20	Image plane	-

TABLE 14

Continuation table 14

Num

A7

A8

A9

A10

A11

A12

2

1.14511E-03

-7.97234E-04

2.22275E-04

3

-1.22220E-03

2.87797E-04

-3.55795E-05

4

-1.32195E-03

2.04009E-04

4.15614E-05

5

-5.46822E-04

-4.59474E-05

2.31112E-06

6

1.86702E-04

-6.76655E-05

7

2.84183E-04

-3.55354E-05

8

4.54585E-04

-5.93743E-05

-4.84612E-06

9

1.51413E-04

-4.49255E-06

-5.52018E-06

10

1.69615E-05

1.43237E-05

5.26502E-08

-3.13449E-07

-5.87416E-08

-3.24114E-08

11

-6.66472E-07

5.86648E-06

-1.67602E-07

-1.06656E-07

-3.67590E-09

-2.58888E-09

12

1.03502E-06

4.25502E-06

-2.44461E-07

-1.29580E-07

-1.04820E-09

1.28832E-09

13

6.77534E-07

-1.18896E-06

-2.27772E-08

1.54231E-08

-6.35607E-10

-1.86460E-10

14

-1.41711E-07

-3.97436E-07

4.03233E-09

1.47772E-09

-6.60079E-11

1.21094E-11

15

-2.08527E-06

-7.80335E-09

2.28503E-08

1.07608E-09

-6.11846E-11

-1.54885E-11

16

-5.01994E-07

3.73503E-08

2.55942E-10

17

1.73204E-06

1.13438E-08

-1.43770E-10

Continuation table 14

Num

A13

A14

A15

A16

A17

A18

2

-2.71081E-05

0.00000E+00

3

-7.71624E-07

0.00000E+00

4

-1.99158E-05

2.00291E-06

5

9.62554E-06

-2.26772E-06

6

7

8

2.39087E-06

-2.01297E-07

9

5.51610E-07

-1.01187E-08

10

-9.34787E-10

3.22219E-10

2.26872E-10

6.19343E-11

3.26649E-12

-2.68147E-12

11

-1.62121E-10

2.28023E-11

5.99337E-12

3.40331E-12

1.03814E-12

-2.13394E-13

12

2.26253E-10

3.36201E-11

2.42389E-12

-4.80801E-13

-1.70772E-13

-2.05937E-14

13

-2.44602E-12

3.51693E-12

1.21497E-12

2.46187E-13

1.18966E-14

-1.43724E-14

14

-6.63666E-13

-4.29066E-14

9.48667E-15

-7.95358E-17

2.32917E-17

-5.56274E-18

15

-1.17015E-12

2.64722E-14

3.59846E-15

1.57383E-15

1.10172E-16

-1.49659E-17

16

-1.01008E-11

17

-3.12316E-12

Watch 15

Element	Start surface	Focal length
			1	2	9.78
2	4	-19.22
			3	6	76.98
4	8	18.35
			5	10	-8.18
6	12	11.99
			7	14	44.42
8	16	73.95

In the present embodiment, when the subject distance is at Infinity (INF) and near (300 mm), the data of d15 is shown in table 16.

TABLE 16

	Infinity	Short distance
			Subject distance	INF	300mm
d15	0.81	1.08

As can be seen from table 16, d15 is 0.81 when the subject distance is at Infinity (INF), and d15 is 1.08 when the subject distance is at close distance (300 mm).

In the present embodiment, a spherical aberration graph of the imaging lens 100 is shown in fig. 14, an astigmatic field curvature diagram is shown in fig. 15, and a distortion graph is shown in fig. 16. FIG. 14 includes a spherical aberration curve of incident light having a wavelength of 656.3000NM, a spherical aberration curve of incident light having a wavelength of 587.6000NM, and a spherical aberration curve of incident light having a wavelength of 486.0000 NM. FIG. 15 includes a curve T of tangential field curvature of incident light having a wavelength of 587.6000NM and a curve S of sagittal field curvature of incident light having a wavelength of 587.6000 NM.

In this embodiment, the overall image quality of the camera lens 100 can be greatly improved, and the range of imaging is expanded. When the electronic zooming is performed, better image quality and close-range effect can be obtained.

Fig. 17 is a schematic configuration diagram of an imaging lens 100 according to another exemplary embodiment. In the present embodiment, the eighth lens is included in the first lens group 11, and the second lens group 12 includes one lens.

As shown in fig. 17, in the present embodiment, the first lens group 11 includes, in order from an object side to an image side: a first lens 111, a third lens 113, a fourth lens 114, a fifth lens 115, a sixth lens 116, a seventh lens 117, a ninth lens 118, and a second lens 112. The first lens 111 is an aspherical lens having positive refractive power. The third lens 113 has negative power. The fourth lens 114 has positive optical power. The fifth lens 115 has a negative power. The sixth lens 116 has a negative power. The seventh lens 117 has a negative power, the ninth lens 118 has a positive power, and the second lens 112 is an aspherical lens having a positive power.

In the present embodiment, the ninth lens 118 includes a twentieth surface 1181 facing the object side and a twenty-first surface 1182 facing the image side.

As shown in fig. 17, in the present embodiment, the second lens group 12 includes one eighth lens 121, and the eighth lens 121 has positive optical power.

In this embodiment, in the process of focusing from infinity to close distance, the first lens group 11 moves toward the object side along the optical axis 14, the second lens group 12 moves toward the image side, and the air space between the first lens group 11 and the second lens group 12 gradually increases.

In the present embodiment, Fno is 2.08, and the focal length of the imaging lens 100 is 9.0. The focal length f1 of the first lens group 11 is 9.29, and the focal length f2 of the second lens group 12 is 196.88. The value of f1/f was 1.03, the value of TTL/IH was 1.46, the value of fL1/f was 0.80, the value of d/f1 was 0.14, | fL2/f2| was 0.17, the value of Vd1/Nd1 was 36.3, and the value of TTL/f was 1.16.

In the present embodiment, the configuration data of the imaging lens 100 is shown in table 17, the aspherical surface data is shown in table 18, and the focal length data of each lens is shown in table 19.

TABLE 17

In table 17, the same as the above embodiment, in the present embodiment, the 1 st surface is a seventeenth surface of the Stop (STO), the 2 nd surface is the first surface 1111 of the first lens 111, the 3 rd surface is the second surface 1112 of the first lens 111, the 4 th surface is the third surface 1131 of the third lens 113, the 5 th surface is the fourth surface 1132 of the third lens 113, the 6 th surface is the fifth surface 1141 of the fourth lens 114, the 7 th surface is the sixth surface 1142 of the fourth lens 114, the 8 th surface is the seventh surface 1151 of the fifth lens 115, the 9 th surface is the eighth surface 1152 of the fifth lens 115, the 10 th surface is the ninth surface 1161 of the sixth lens 116, the 11 th surface is the tenth surface 1162 of the sixth lens 116, the 12 th surface is the eleventh surface 1171 of the seventh lens 117, and the 13 th surface is the twelfth surface 1172 of the seventh lens 117.

Unlike the foregoing embodiment, in the present embodiment, the 14 th surface is a twentieth surface 1181 of the ninth lens 118, the 15 th surface is a twenty-first surface 1182 of the ninth lens 118, the 16 th surface is a thirteenth surface 1121 of the second lens 112, the 17 th surface is a fourteenth surface 1112 of the second lens 112, the 18 th surface is a fifteenth surface 1211 of the eighth lens 121, the 19 th surface is a sixteenth surface 1212 of the eighth lens 121, the 20 th surface is an eighteenth surface 151 of the filter element 15 facing the object side, the 21 st surface is a nineteenth surface 152 of the filter element 15 facing the image side, and the 22 nd surface is an image plane 131.

In the present embodiment, d17 is an air space between the 17 th surface and the 18 th surface, that is, an air space between the first lens group 11 and the second lens group 12, and d19 is an air space between the 19 th surface and the 20 th surface, that is, an air space between the second lens group 12 and the eighteenth surface 151.

Watch 18

Num	K	A4	A6	A8	A10
						2	0.00000E+00	-4.84795E-04	7.76784E-04	-4.36387E-04	6.66534E-05
3	0.00000E+00	-4.05878E-03	9.92681E-03	-1.18239E-02	7.37601E-03
						4	-7.18470E-01	-1.56462E-02	1.79159E-02	-2.39364E-02	1.75604E-02
5	-1.30232E-01	-1.29811E-02	9.39117E-03	-1.26321E-02	8.55054E-03
						6	2.66027E+00	-2.21035E-04	1.48396E-03	6.18120E-03	-1.31633E-02
7	-2.71262E+01	-6.78585E-03	4.73205E-03	-4.80027E-03	3.08224E-03
						8	-79.3152	-0.03703835	0.008753212	-0.01113056	0.009595714
9	-7.124521036	-0.035654504	-0.015199937	0.089091664	-0.197584055
						10	-0.078361236	-0.049773889	0.009323083	0.052006425	-0.150821916
11	13.79313	-0.05633645	0.05335295	-0.04373659	0.02300393
						12	-0.521545626	-0.077830663	0.13446567	-0.136771427	0.100362169
13	-3.351622711	-0.127242682	0.134266441	-0.121157308	0.078583129
						14	-12.48757834	0.046052448	-0.038936432	0.017398254	-0.005846171
15	0.034266185	0.025037611	-0.009693793	0.000242749	0.000472076
						16	-0.995734756	-0.151309084	0.051990462	-0.012849667	0.002211922
17	-1.011493196	-0.114255013	0.03751601	-0.009767382	0.001837667
						18	-5.804001	0.000137489	6.03883E-06	-2.43512E-06	1.67339E-07
19	-2.064018	-0.000175238	-8.14403E-06	2.25456E-07	-2.74232E-08

Continuation table 18

Continuation table 18

Num

A20

A22

A24

A26

A28

A30

2

5.62353E-09

3

9.31910E-08

4

-1.28660E-06

5

2.86214E-08

6

1.95669E-05

7

6.90220E-07

8

-3.68519E-06

9

-0.001237299

0.003858319

-0.00142647

0.000267945

-2.66553E-05

1.11691E-06

10

0.012682014

-0.00162836

-3.64144E-05

4.65192E-05

-6.42601E-06

3.07467E-07

11

-6.96244E-07

12

-4.70392E-05

-8.42115E-06

2.37031E-06

-2.63237E-07

1.49066E-08

-3.53486E-10

13

6.28504E-06

-3.24355E-06

4.03894E-07

-2.64832E-08

9.29299E-10

-1.37995E-11

14

1.47544E-07

-6.06702E-09

1.63846E-10

-2.62362E-12

1.90683E-14

-4.56068E-18

15

1.03941E-08

-1.11176E-09

5.81867E-11

-1.74139E-12

2.85146E-14

-1.98931E-16

16

-6.50329E-10

-3.94532E-12

4.83109E-13

-1.11289E-14

1.20151E-16

-5.24941E-19

17

-7.21771E-10

-1.29752E-11

9.85884E-13

-2.32596E-14

2.67239E-16

-1.25523E-18

18

-1.4194E-16

19

3.91128E-17

Watch 19

Element	Start surface	Focal length
			1	2	7.17
2	4	-17.87
			3	6	62.09
4	8	-39.98
			5	10	-51.92
6	12	-21.14
			7	14	20.94
8	16	33.05
			9	18	196.88

In this embodiment, when the subject distance is at Infinity (INF) and near (100 mm), the data of d17 and d19 are shown in table 20.

Watch 20

	Infinity	Short distance
			Subject distance	INF	100mm
d17	0.56	1.83
			d19	1.70	1.50

As can be seen from table 20, when the subject distance is Infinity (INF), d17 is 0.56, d19 is 1.70, and when the subject distance is close (100 mm), d17 is 1.83, and d19 is 1.50.

In the present embodiment, a spherical aberration graph of the imaging lens 100 is shown in fig. 18, an astigmatic field curvature diagram is shown in fig. 19, and a distortion graph is shown in fig. 20. FIG. 18 includes a spherical aberration curve of incident light having a wavelength of 656.3000NM, a spherical aberration curve of incident light having a wavelength of 587.6000NM, and a spherical aberration curve of incident light having a wavelength of 486.0000 NM. FIG. 19 includes a curve T of tangential field curvature of incident light having a wavelength of 587.6000NM and a curve S of sagittal field curvature of incident light having a wavelength of 587.6000 NM.

In this embodiment, the overall image quality of the camera lens 100 can be greatly improved, and the range of imaging is expanded. When the electronic zooming is performed, better image quality and close-range effect can be obtained.

The imaging lens provided by the embodiment of the present disclosure is described in detail above. The following briefly introduces an image capturing apparatus and an electronic device provided in an embodiment of the present disclosure.

As shown in fig. 1, 5, 9, 13, and 17, an exemplary embodiment of the present disclosure further provides an image capturing apparatus, including an image sensor 13 and the image capturing lens 100 according to any of the above embodiments, where the image sensor 13 is located at an image plane 131 of the image capturing lens 100, and a surface of the image sensor 13 facing the object side is located at the image plane 131.

In this embodiment, since the image capturing lens includes a first lens group and a second lens group in order from an object side to an image side, the first lens group includes N lenses, wherein, the N lenses comprise at least two aspheric lenses, in the direction from the object side to the image side, the first lens in the first lens group is a first lens, the Nth lens is a second lens, the first lens is an aspheric lens with positive focal power, the surface of the first lens facing the object side is a convex surface, the second lens is an aspheric lens with focal power, the second lens group comprises at least one lens with focal power, therefore, the camera lens can be matched with the second lens group through the first lens group, during focusing from infinity to close range, the aberration variation caused by the first lens group and the aberration variation caused by the second lens group are allowed to compensate each other, thereby maintaining good resolving power during focusing from infinity to close range. Further, the focal length of the first lens group and the focal length of the image pickup lens satisfy the relation 0.5< f1/f <1.5, and therefore, a balance between total optical length (TTL) and optical performance can be secured.

An exemplary embodiment of the present disclosure also provides an electronic device. The electronic equipment comprises an equipment body and the camera device in any embodiment, wherein the camera device is assembled on the equipment body.

In this embodiment, the electronic device may be, but is not limited to, a three-dimensional image capturing device, a digital camera, a mobile terminal, a digital tablet, a smart television, a network monitoring device, a motion sensing game machine, a car recorder, a car backing and developing device, a wearable device, or an aerial camera.

In this embodiment, since the image capturing lens includes a first lens group and a second lens group in order from an object side to an image side, the first lens group includes N lenses, wherein, the N lenses comprise at least two aspheric lenses, in the direction from the object side to the image side, the first lens in the first lens group is a first lens, the Nth lens is a second lens, the first lens is an aspheric lens with positive focal power, the surface of the first lens facing the object side is a convex surface, the second lens is an aspheric lens with focal power, the second lens group comprises at least one lens with focal power, therefore, the camera lens can be matched with the second lens group through the first lens group, during focusing from infinity to close range, the aberration variation caused by the first lens group and the aberration variation caused by the second lens group are allowed to compensate each other, thereby maintaining good resolving power during focusing from infinity to close range. Further, the focal length of the first lens group and the focal length of the image pickup lens satisfy the relation 0.5< f1/f <1.5, and therefore, a balance between total optical length (TTL) and optical performance can be secured.

Other embodiments of the disclosure will be apparent to those skilled in the art from consideration of the specification and practice of the disclosure disclosed herein. This application is intended to cover any variations, uses, or adaptations of the disclosure following, in general, the principles of the disclosure and including such departures from the present disclosure as come within known or customary practice within the art to which the disclosure pertains. It is intended that the specification and examples be considered as exemplary only, with a true scope and spirit of the disclosure being indicated by the following claims.

It will be understood that the present disclosure is not limited to the precise arrangements described above and shown in the drawings and that various modifications and changes may be made without departing from the scope thereof. The scope of the present disclosure is limited only by the appended claims.

Claims (12)

1. An imaging lens includes, in order from an object side to an image side: a first lens group and a second lens group;

the first lens group comprises N lenses, wherein N is an integer larger than 2, and the N lenses comprise at least two aspheric lenses; in a direction from the object side to the image side, a first lens in the first lens group is a first lens, and an Nth lens in the first lens group is a second lens; the first lens is an aspheric lens with positive focal power, the surface of the first lens facing the object side is a convex surface, and the second lens is an aspheric lens with focal power;

the second lens group includes at least one lens having optical power;

an air space between the first lens group and the second lens group changes during focusing from infinity to close range;

wherein the focal length of the first lens group is f1, the focal length of the image pickup lens during focusing at infinity is f, and the focal length of the first lens group and the focal length of the image pickup lens satisfy the following relation:

0.5<f1/f<1.5。

2. the imaging lens according to claim 1, wherein the first lens group moves toward the object side along the optical axis during focusing from infinity to close range, the second lens group is fixed in position, and an air space between the first lens group and the second lens group at the close range is larger than that at the infinity focusing.

3. The imaging lens according to claim 1, wherein the first lens group moves toward the object side along the optical axis and the second lens group moves toward the image side along the optical axis during focusing from infinity to close distance, and an air space between the first lens group and the second lens group at the close distance is larger than that at the infinity focusing.

4. The imaging lens according to claim 1, wherein the first lens group moves toward the object side along the optical axis and the second lens group moves toward the object side along the optical axis during focusing from infinity to close range, and an air space between the first lens group and the second lens group at the time of close range focusing is larger than an air space between the first lens group and the second lens group at the time of focusing at infinity.

5. The imaging lens system of claim 1, wherein an axial distance between a vertex of the surface of the first lens element facing the object side and the image plane is TTL, an effective image height is IH, and the axial distance between the vertex of the surface of the first lens element facing the object side and the image plane and the effective image height satisfy the following relation:

1.0<TTL/IH<2.0。

6. the imaging lens according to claim 1, wherein a focal length of the first lens is f L1, and the focal length of the first lens and the focal length of the imaging lens in focusing at infinity satisfy the following relationship:

0.5<fL1/f<2.0。

7. an imaging lens according to claim 1, wherein an air interval variation amount between the first lens group and the second lens group is d, and the following relation is satisfied between the air interval variation amount and a focal length of the first lens group:

0<d/f1<0.5，

the air interval variation is an absolute value of a difference between an air interval between the first lens group and the second lens group at the time of infinity focusing and an air interval between the first lens group and the second lens group at the time of close-range focusing.

8. The imaging lens according to claim 1, wherein a focal length of the second lens is fL2, a focal length of the second lens group is f2, and the focal length of the second lens group satisfy the following relationship:

|fL2/f2|<5.0。

9. the imaging lens according to claim 6, wherein the abbe number of the first lens is Vd1, the refractive index of the first lens is Nd1, and the abbe number of the first lens and the refractive index of the first lens satisfy the following relation:

30.0<Vd1/Nd1<40.0。

10. the imaging lens of claim 1, wherein an axial distance between a vertex of the surface of the first lens element facing the object side and the image plane is TTL, and an axial distance between a vertex of the surface of the first lens element facing the object side and the image plane and an optical focal length of the imaging lens at infinity satisfy the following relationship:

1.0<TTL/f<5.0。

11. an image pickup apparatus comprising the image sensor and the image pickup lens according to any one of claims 1 to 10, the image sensor being located at an image plane of the image pickup lens.

12. An electronic apparatus comprising an apparatus body and the image pickup device according to claim 11, the image pickup device being mounted on the apparatus body.

Images