Zoom lens

文档序号：1860315 发布日期：2021-11-19 浏览：17次中文

阅读说明：本技术 变焦镜头 (Zoom lens ) 是由吴琪戴付建赵烈烽于 2021-08-13 设计创作，主要内容包括：本申请公开了一种变焦镜头,沿光轴由物侧至像侧依序包括：具有负光焦度的第一透镜组,由第一透镜和第二透镜组成,第二透镜的材质为玻璃,第二透镜的物侧面和像侧面均为球面；具有正光焦度的第二透镜组,由第三透镜、第四透镜和第五透镜组成,第四透镜的材质为玻璃,第四透镜的物侧面和像侧面均为球面；以及具有负光焦度的第三透镜组,由第六透镜和第七透镜组成。通过改变第二透镜组和第三透镜组在光轴上的位置,使变焦镜头在长焦端状态与广角端状态之间进行切换并实现连续变焦,变焦镜头在长焦端状态时的有效焦距FT、第二透镜组的有效焦距FG2与第三透镜组的有效焦距FG3满足：1.2＜FT/(FG2-FG3)＜3.0。(The application discloses a zoom lens, include from the object side to the image side along the optical axis in proper order: the first lens group with negative focal power consists of a first lens and a second lens, the second lens is made of glass, and the object side surface and the image side surface of the second lens are spherical surfaces; the second lens group with positive focal power consists of a third lens, a fourth lens and a fifth lens, wherein the fourth lens is made of glass, and the object side surface and the image side surface of the fourth lens are spherical surfaces; and a third lens group having negative power, composed of a sixth lens and a seventh lens. And switching the zoom lens between a telephoto end state and a wide-angle end state and realizing continuous zooming by changing the positions of the second lens group and the third lens group on the optical axis, wherein an effective focal length FT of the zoom lens in the telephoto end state, an effective focal length FG2 of the second lens group, and an effective focal length FG3 of the third lens group satisfy: 1.2 < FT/(FG2-FG3) < 3.0.)

1. The zoom lens, in order from an object side to an image side along an optical axis, comprises:

the first lens group with negative focal power consists of a first lens and a second lens, the second lens is made of glass, and the object side surface and the image side surface of the second lens are spherical surfaces;

the second lens group with positive focal power consists of a third lens, a fourth lens and a fifth lens, wherein the fourth lens is made of glass, and the object side surface and the image side surface of the fourth lens are both spherical surfaces; and

a third lens group having negative refractive power, composed of a sixth lens and a seventh lens;

switching the zoom lens between a telephoto end state and a wide-angle end state and effecting continuous zooming by changing positions of the second lens group and the third lens group on the optical axis,

the zoom lens satisfies: FT/(FG2-FG3) < 3.0 < 1.2,

wherein FT is an effective focal length of the zoom lens in the telephoto end state, FG2 is an effective focal length of the second lens group, and FG3 is an effective focal length of the third lens group.

2. The zoom lens according to claim 1, wherein an effective focal length f1 of the first lens, an effective focal length f2 of the second lens, and an effective focal length FG1 of the first lens group satisfy:

2.3＜(f1-f2)/FG1＜3.0。

3. the zoom lens according to claim 1, wherein a radius of curvature R1 of an object-side surface of the first lens, a radius of curvature R2 of an image-side surface of the first lens, a radius of curvature R3 of an object-side surface of the second lens, and a radius of curvature R4 of an image-side surface of the second lens satisfy:

1.8＜(R1+R2)/(R3+R4)＜2.8。

4. the zoom lens according to claim 1, wherein an effective focal length f5 of the fifth lens and an effective focal length f3 of the third lens satisfy:

1.4＜f5/f3＜2.4。

5. the zoom lens according to claim 1, wherein a radius of curvature R7 of an object-side surface of the fourth lens, a radius of curvature R8 of an image-side surface of the fourth lens, and an effective focal length f4 of the fourth lens satisfy:

1.4＜(R7+R8)/f4＜3.0。

6. the zoom lens according to any one of claims 1 to 5, wherein a refractive index N2 of the second lens and a refractive index N4 of the fourth lens satisfy:

3.4＜N2+N4＜4。

7. the zoom lens according to any one of claims 1 to 5, wherein a center thickness CT3 of the third lens on the optical axis, a center thickness CT4 of the fourth lens on the optical axis, a center thickness CT5 of the fifth lens on the optical axis, a center thickness CT1 of the first lens on the optical axis, a center thickness CT2 of the second lens on the optical axis, and a center thickness CT6 of the sixth lens on the optical axis, and a center thickness CT7 of the seventh lens on the optical axis satisfy:

1.2＜(CT3+CT4+CT5)/(CT1+CT2+CT6+CT7)＜1.8。

8. the zoom lens according to any one of claims 1 to 5, wherein an effective focal length f6 of the sixth lens and an effective focal length f7 of the seventh lens satisfy:

1.5＜(f6-f7)/(f6+f7)＜2.5。

9. the zoom lens according to any one of claims 1 to 5, wherein a radius of curvature R11 of an object-side surface of the sixth lens and a radius of curvature R12 of an image-side surface of the sixth lens satisfy:

1.0＜R11/R12＜1.6。

10. a zoom lens according to any one of claims 1 to 5, wherein a curvature radius R14 of an image side surface of the seventh lens, a curvature radius R13 of an object side surface of the seventh lens, and an effective focal length FW of the zoom lens in the wide-angle end state satisfy:

1.0＜(R14-R13)/FW＜2.3。

Technical Field

The present application relates to the field of optical elements, and more particularly, to a zoom lens.

Background

With the continuous development of society and the continuous progress of optical technology, mobile phone lenses have been developed rapidly in recent years, the types of mobile phone lenses have not been limited to conventional designs such as wide angle, telephoto, large aperture, large image plane, etc., and new technologies such as free-form surface, continuous zooming, etc. have been developed gradually and are becoming mature.

The traditional scheme for realizing zooming adopts digital zooming through a module, the zooming mode is realized by switching a lens, serious pixel loss can be caused, the scheme for seriously losing pixels is hardly accepted by a user along with the continuous improvement of user experience requirements, and therefore the mobile phone lens with the continuous optical zooming function is gradually derived, and the user has more perfect photographing experience.

The zoom lens is a mobile phone lens which can change focal length within a certain range so as to obtain different wide and narrow field angles, images with different sizes and different scene ranges. The zoom lens realizes the change of focal length through the mutual movement among different groups, thereby taking pictures without losing pixels. It is believed that zoom lenses will become increasingly popular in the high-end mobile phone market in the near future.

Disclosure of Invention

One aspect of the present disclosure provides a zoom lens, sequentially from an object side to an image side along an optical axis, comprising: the first lens group with negative focal power consists of a first lens and a second lens, the second lens is made of glass, and the object side surface and the image side surface of the second lens are spherical surfaces; the second lens group with positive focal power consists of a third lens, a fourth lens and a fifth lens, wherein the fourth lens is made of glass, and the object side surface and the image side surface of the fourth lens are both spherical surfaces; and a third lens group having negative power, composed of a sixth lens and a seventh lens. By changing the positions of the second lens group and the third lens group on the optical axis, the zoom lens is switched between a telephoto end state and a wide-angle end state, and continuous zooming is achieved, and an effective focal length FT of the zoom lens in the telephoto end state, an effective focal length FG2 of the second lens group, and an effective focal length FG3 of the third lens group may satisfy: 1.2 < FT/(FG2-FG3) < 3.0.

In one embodiment, an effective focal length f1 of the first lens, an effective focal length f2 of the second lens, and an effective focal length FG1 of the first lens group may satisfy: 2.3 < (f1-f2)/FG1 < 3.0.

In one embodiment, the radius of curvature R1 of the object-side surface of the first lens, the radius of curvature R2 of the image-side surface of the first lens, the radius of curvature R3 of the object-side surface of the second lens, and the radius of curvature R4 of the image-side surface of the second lens may satisfy: 1.8 < (R1+ R2)/(R3+ R4) < 2.8.

In one embodiment, the effective focal length f5 of the fifth lens and the effective focal length f3 of the third lens may satisfy: f5/f3 is more than 1.4 and less than 2.4.

In one embodiment, a radius of curvature R7 of an object-side surface of the fourth lens, a radius of curvature R8 of an image-side surface of the fourth lens, and an effective focal length f4 of the fourth lens may satisfy: 1.4 < (R7+ R8)/f4 < 3.0.

In one embodiment, the refractive index N2 of the second lens and the refractive index N4 of the fourth lens may satisfy: 3.4 < N2+ N4 < 4.

In one embodiment, a center thickness CT3 of the third lens on the optical axis, a center thickness CT4 of the fourth lens on the optical axis, a center thickness CT5 of the fifth lens on the optical axis, a center thickness CT1 of the first lens on the optical axis, a center thickness CT2 of the second lens on the optical axis, and a center thickness CT6 of the sixth lens on the optical axis, and a center thickness CT7 of the seventh lens on the optical axis may satisfy: 1.2 < (CT3+ CT4+ CT5)/(CT1+ CT2+ CT6+ CT7) < 1.8.

In one embodiment, the effective focal length f6 of the sixth lens and the effective focal length f7 of the seventh lens may satisfy: 1.5 < (f6-f7)/(f6+ f7) < 2.5.

In one embodiment, a radius of curvature R11 of an object-side surface of the sixth lens and a radius of curvature R12 of an image-side surface of the sixth lens may satisfy: 1.0 < R11/R12 < 1.6.

In one embodiment, a curvature radius R14 of an image-side surface of the seventh lens, a curvature radius R13 of an object-side surface of the seventh lens, and an effective focal length FW of the zoom lens in the wide-angle end state may satisfy: 1.0 < (R14-R13)/FW < 2.3.

The lens framework of the three lens groups is adopted in the application, and comprises seven lenses, the focal power of each lens group is reasonably distributed, the focal power of each lens is reasonably distributed, the surface type and the thickness of each lens are optimally selected, the lens has the beneficial effects of continuous zooming, high imaging quality, miniaturization, high resolution and the like, and the application requirement of the high-end smartphone camera lens can be better met.

Drawings

Other features, objects, and advantages of the present application will become more apparent from the following detailed description of non-limiting embodiments when taken in conjunction with the accompanying drawings. In the drawings:

fig. 1A shows a schematic configuration view of a zoom lens according to embodiment 1 of the present application in a wide-angle end state;

fig. 1B shows a schematic configuration view of a zoom lens according to embodiment 1 of the present application in an intermediate end state;

fig. 1C is a schematic structural view showing a zoom lens according to embodiment 1 of the present application in a telephoto end state;

fig. 2A-1 to 2A-4 show an on-axis chromatic aberration curve, an astigmatism curve, a distortion curve, and a chromatic aberration of magnification curve, respectively, in the wide-angle end state of the zoom lens of embodiment 1;

FIGS. 2B-1 to 2B-4 show an on-axis chromatic aberration curve, an astigmatism curve, a distortion curve, and a magnification chromatic aberration curve, respectively, in a middle-end state of the zoom lens of embodiment 1;

FIGS. 2C-1 to 2C-4 show an on-axis chromatic aberration curve, an astigmatism curve, a distortion curve, and a magnification chromatic aberration curve, respectively, in a telephoto end state for the zoom lens of embodiment 1;

fig. 3A shows a schematic configuration diagram of a zoom lens according to embodiment 2 of the present application in a wide-angle end state;

fig. 3B shows a schematic configuration view of a zoom lens according to embodiment 2 of the present application in an intermediate end state;

fig. 3C is a schematic structural view showing a zoom lens according to embodiment 2 of the present application in a telephoto end state;

fig. 4A-1 to 4A-4 show an on-axis chromatic aberration curve, an astigmatism curve, a distortion curve, and a chromatic aberration of magnification curve, respectively, in the wide-angle end state of the zoom lens of embodiment 2;

FIGS. 4B-1 to 4B-4 show an on-axis chromatic aberration curve, an astigmatism curve, a distortion curve, and a magnification chromatic aberration curve, respectively, in a middle-end state of the zoom lens of embodiment 2;

FIGS. 4C-1 to 4C-4 show an on-axis chromatic aberration curve, an astigmatism curve, a distortion curve, and a chromatic aberration of magnification curve, respectively, in a telephoto end state for the zoom lens of embodiment 2;

fig. 5A shows a schematic configuration diagram of a zoom lens according to embodiment 3 of the present application in a wide-angle end state;

fig. 5B shows a schematic configuration view of a zoom lens according to embodiment 3 of the present application in an intermediate end state;

fig. 5C is a schematic structural view showing a zoom lens according to embodiment 3 of the present application in a telephoto end state;

fig. 6A-1 to 6A-4 show an on-axis chromatic aberration curve, an astigmatism curve, a distortion curve, and a chromatic aberration of magnification curve, respectively, in the wide-angle end state of the zoom lens of embodiment 3;

FIGS. 6B-1 to 6B-4 show an on-axis chromatic aberration curve, an astigmatism curve, a distortion curve, and a magnification chromatic aberration curve, respectively, in a middle-end state of the zoom lens of embodiment 3;

FIGS. 6C-1 to 6C-4 show an on-axis chromatic aberration curve, an astigmatism curve, a distortion curve, and a chromatic aberration of magnification curve, respectively, in a telephoto end state for the zoom lens of embodiment 3;

fig. 7A shows a schematic configuration diagram of a zoom lens according to embodiment 4 of the present application in a wide-angle end state;

fig. 7B shows a schematic configuration view of a zoom lens according to embodiment 4 of the present application in an intermediate end state;

fig. 7C is a schematic structural view showing a zoom lens according to embodiment 4 of the present application in a telephoto end state;

fig. 8A-1 to 8A-4 show an on-axis chromatic aberration curve, an astigmatism curve, a distortion curve, and a chromatic aberration of magnification curve, respectively, in the wide-angle end state of the zoom lens of embodiment 4;

FIGS. 8B-1 to 8B-4 show an on-axis chromatic aberration curve, an astigmatism curve, a distortion curve, and a chromatic aberration of magnification curve, respectively, in a middle-end state of the zoom lens of embodiment 4;

FIGS. 8C-1 to 8C-4 show an on-axis chromatic aberration curve, an astigmatism curve, a distortion curve, and a chromatic aberration of magnification curve, respectively, in a telephoto end state for the zoom lens of embodiment 4;

Detailed Description

For a better understanding of the present application, various aspects of the present application will be described in more detail with reference to the accompanying drawings. It should be understood that the detailed description is merely illustrative of exemplary embodiments of the present application and does not limit the scope of the present application in any way. Like reference numerals refer to like elements throughout the specification. The expression "and/or" includes any and all combinations of one or more of the associated listed items.

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

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

Herein, the paraxial region refers to a region near the optical axis. If the lens surface is convex and the convex position is not defined, it means that the lens surface is convex at least in the paraxial region; if the lens surface is concave and the concave position is not defined, it means that the lens surface is concave at least in the paraxial region. In this document, the surface of each lens closest to the subject is referred to as the object-side surface of the lens, and the surface of each lens closest to the image plane is referred to as the image-side surface of the lens.

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 an example or illustration.

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 in the present application may be combined with each other without conflict. The present application will be described in detail below with reference to the embodiments with reference to the attached drawings.

The features, principles, and other aspects of the present application are described in detail below.

A zoom lens according to an exemplary embodiment of the present application may include, for example, three lens groups having power, i.e., a first lens group, a second lens group, and a third lens group. The three lens groups are arranged in sequence from an object side to an image side along an optical axis.

In an exemplary embodiment, the first lens group may have a negative power; the second lens group may have positive optical power; the third lens group may have negative power.

In an exemplary embodiment, the first lens group may be composed of a first lens and a second lens, wherein the second lens may be made of glass, and both an object side surface and an image side surface of the second lens may be spherical; the second lens group can be composed of a third lens, a fourth lens and a fifth lens, wherein the fourth lens can be made of glass, and the object side surface and the image side surface of the fourth lens can be spherical surfaces; the third lens group may be composed of a sixth lens and a seventh lens.

In an exemplary embodiment, the zoom lens is switched between a telephoto end state and a wide-angle end state and continuous zooming is achieved by changing positions of the second lens group and the third lens group on an optical axis.

In an exemplary embodiment, the zoom lens of the present application may satisfy the conditional expression 1.2 < FT/(FG2-FG3) < 3.0, where FT is an effective focal length of the zoom lens in a telephoto end state, FG2 is an effective focal length of the second lens group, and FG3 is an effective focal length of the third lens group. By controlling the ratio of the effective focal length of the zoom lens in the telephoto end state to the difference between the effective focal length of the second lens group and the effective focal length of the third lens group within the range, the reasonable configuration of the telephoto end focal power is facilitated, and the aberration is reduced. The second lens group can be made to realize a zooming function, and the third lens group can be made to realize a compensation function. Specifically, when the second lens group moves, the focal length of the system changes, so that extra optical path difference is generated between light rays reaching an image surface, and the image quality is reduced. In addition, the second lens and the fourth lens are made of glass materials, so that aberration can be reduced to a certain extent, meanwhile, the moving stroke of the motor can also be reduced, the small size of the zoom lens can be favorably realized, and the requirement of a space architecture of a mobile phone can be met. More specifically, FT, FG2, and FG3 can satisfy 1.2 < FT/(FG2-FG3) < 1.5.

In an exemplary embodiment, the zoom lens of the present application may satisfy the conditional expression 2.3 < (f1-f2)/FG1 < 3.0, where f1 is an effective focal length of the first lens, f2 is an effective focal length of the second lens, and FG1 is an effective focal length of the first lens group. By controlling the ratio of the difference between the effective focal length of the first lens and the effective focal length of the second lens to the effective focal length of the first lens group within the range, the reasonable configuration of the focal power of the first lens group is facilitated, and the aberration is reduced. More specifically, f1, f2, and FG1 may satisfy 2.5 < (f1-f2)/FG1 < 2.8.

In an exemplary embodiment, the zoom lens of the present application may satisfy the conditional expression 1.8 < (R1+ R2)/(R3+ R4) < 2.8, where R1 is a radius of curvature of an object-side surface of the first lens, R2 is a radius of curvature of an image-side surface of the first lens, R3 is a radius of curvature of an object-side surface of the second lens, and R4 is a radius of curvature of an image-side surface of the second lens. By controlling the ratio of the sum of the curvature radius of the object side surface of the first lens and the curvature radius of the image side surface of the first lens to the sum of the curvature radius of the object side surface of the second lens and the curvature radius of the image side surface of the second lens to be in the range, the aberration contribution amount of the first lens and the second lens to the zoom lens can be favorably and reasonably adjusted. More specifically, R1, R2, R3 and R4 may satisfy 2.0 < (R1+ R2)/(R3+ R4) < 2.6.

In an exemplary embodiment, the zoom lens of the present application may satisfy the conditional expression 1.4 < f5/f3 < 2.4, where f5 is an effective focal length of the fifth lens and f3 is an effective focal length of the third lens. By controlling the ratio of the effective focal length of the fifth lens to the effective focal length of the third lens in the range, the lens system can be favorably and reasonably distributed with focal power in the zooming process, and the aberration can be favorably reduced. More specifically, f5 and f3 may satisfy 1.5 < f5/f3 < 2.1.

In an exemplary embodiment, the zoom lens of the present application may satisfy the conditional expression 1.4 < (R7+ R8)/f4 < 3.0, where R7 is a radius of curvature of an object-side surface of the fourth lens, R8 is a radius of curvature of an image-side surface of the fourth lens, and f4 is an effective focal length of the fourth lens. The ratio of the sum of the curvature radius of the object side surface of the fourth lens and the curvature radius of the image side surface of the fourth lens to the effective focal length of the fourth lens is controlled to be in the range, so that the aberration contribution of the fourth lens to the zoom lens can be reasonably adjusted. More specifically, R7, R8 and f4 may satisfy 1.5 < (R7+ R8)/f4 < 2.8.

In an exemplary embodiment, the zoom lens of the present application may satisfy the conditional expression 3.4 < N2+ N4 < 4, where N2 is a refractive index of the second lens and N4 is a refractive index of the fourth lens. By controlling the sum of the refractive index of the second lens and the refractive index of the fourth lens to be in the range, the aberration contribution amount of the second lens and the aberration contribution amount of the fourth lens to the zoom lens can be reasonably adjusted. More specifically, N2 and N4 may satisfy 3.7 < N2+ N4 < 3.9.

In an exemplary embodiment, the zoom lens of the present application may satisfy the conditional expression 1.2 < (CT3+ CT4+ CT5)/(CT1+ CT2+ CT6+ CT7) < 1.8, where CT3 is a central thickness of the third lens on an optical axis, CT4 is a central thickness of the fourth lens on an optical axis, CT5 is a central thickness of the fifth lens on an optical axis, CT1 is a central thickness of the first lens on an optical axis, CT2 is a central thickness of the second lens on an optical axis, CT6 is a central thickness of the sixth lens on an optical axis, and CT7 is a central thickness of the seventh lens on an optical axis. The spatial distribution of each lens group is facilitated by controlling the ratio of the sum of the central thickness of the third lens on the optical axis and the central thickness of the fourth lens and the central thickness of the fifth lens on the optical axis to the sum of the central thickness of the first lens on the optical axis, the central thickness of the second lens on the optical axis and the central thickness of the sixth lens and the central thickness of the seventh lens on the optical axis within this range. More specifically, CT3, CT4, CT5, CT1, CT2, CT6, and CT7 may satisfy 1.4 < (CT3+ CT4+ CT5)/(CT1+ CT2+ CT6+ CT7) < 1.7.

In an exemplary embodiment, the zoom lens of the present application may satisfy the conditional expression 1.5 < (f6-f7)/(f6+ f7) < 2.5, where f6 is an effective focal length of the sixth lens and f7 is an effective focal length of the seventh lens. By controlling the ratio of the difference between the effective focal length of the sixth lens and the effective focal length of the seventh lens to the sum of the effective focal length of the sixth lens and the effective focal length of the seventh lens to be within the range, the compensation group (the third lens group) is favorable for reasonably distributing focal power, and is favorable for reducing aberration. More specifically, f6 and f7 may satisfy 1.8 < (f6-f7)/(f6+ f7) < 2.2.

In an exemplary embodiment, the zoom lens of the present application may satisfy the conditional expression 1.0 < R11/R12 < 1.6, where R11 is a radius of curvature of an object-side surface of the sixth lens and R12 is a radius of curvature of an image-side surface of the sixth lens. The ratio of the curvature radius of the object side surface of the sixth lens to the curvature radius of the image side surface of the sixth lens is controlled within the range, so that the aberration contribution of the sixth lens to the zoom lens can be reasonably adjusted. More specifically, R11 and R12 may satisfy 1.2 < R11/R12 < 1.5.

In an exemplary embodiment, the zoom lens of the present application may satisfy the conditional expression 1.0 < (R14-R13)/FW < 2.3, where R14 is a radius of curvature of an image side surface of the seventh lens, R13 is a radius of curvature of an object side surface of the seventh lens, and FW is an effective focal length of the zoom lens in the wide-angle end state. By controlling the ratio of the difference between the radius of curvature of the image-side surface of the seventh lens and the radius of curvature of the object-side surface of the seventh lens to the effective focal length of the zoom lens in the wide-angle end state within this range, it is advantageous to reduce aberrations. More specifically, R14, R13 and FW may satisfy 1.1 < (R14-R13)/FW < 2.2.

In an exemplary embodiment, the zoom lens may further include at least one stop. The stop may be disposed at an appropriate position as required, for example, between the first lens group and the second lens group, and specifically, the stop may be disposed, for example, on the object side surface of the third lens. Optionally, the zoom lens may further include a filter for correcting color deviation and/or a protective glass for protecting a photosensitive element located on the image plane.

A zoom lens according to the above-described embodiments of the present application may employ a plurality of lens groups, for example, three as described above, and the plurality of lens groups may include a plurality of lenses, for example, seven lenses as described above. By reasonably distributing the focal power of each lens group and the on-axis distance between the lens groups, reasonably distributing the focal power, the surface type, the center thickness of each lens, the on-axis distance between the lenses and the like of each lens contained in each lens group, the lens has the beneficial effects of continuous zooming, high imaging quality, miniaturization, high resolution and the like, and can better meet the application requirements of the high-end smartphone camera lens.

In the embodiment of the present application, at least one of the mirror surfaces of the first lens, the third lens, the fifth lens, the sixth lens, and the seventh lens is an aspherical mirror surface. The aspheric lens is characterized in that: the curvature varies continuously from the center of the lens to the periphery of the lens. Unlike a spherical lens having a constant curvature from the center of the lens to the periphery of the lens, an aspherical lens has better curvature radius characteristics, and has advantages of improving distortion aberration and improving astigmatic aberration. After the aspheric lens is adopted, the aberration generated in imaging can be eliminated as much as possible, and the imaging quality is further improved. Optionally, at least one of an object-side surface and an image-side surface of each of the first lens, the third lens, the fifth lens, the sixth lens, and the seventh lens is an aspherical mirror surface. Optionally, each of the first, third, fifth, sixth, and seventh lenses has an object-side surface and an image-side surface that are aspheric mirror surfaces.

However, it will be understood by those skilled in the art that the number of lens groups constituting the zoom lens may be changed and the number of lenses included in each lens group may be changed without departing from the technical solution claimed in the present application to obtain the respective results and advantages described in the present specification. For example, although the description has been made taking three lens groups (including seven lenses in total) as an example in the embodiment, the zoom lens is not limited to including three lens groups, nor is the zoom lens limited to including seven lenses in total. The zoom lens may further include other numbers of lens groups and other numbers of lenses, if necessary.

Specific examples of zoom lenses applicable to the above-described embodiments are further described below with reference to the drawings.

Example 1

A zoom lens according to embodiment 1 of the present application is described below with reference to fig. 1A, 1B, 1C, fig. 2A-1 to 2A-4, fig. 2B-1 to 2B-4, and fig. 2C-1 to 2C-4. Fig. 1A shows a schematic configuration view of a zoom lens according to embodiment 1 of the present application in a wide-angle end state; fig. 1B shows a schematic configuration view of a zoom lens according to embodiment 1 of the present application in an intermediate end state; fig. 1C is a schematic structural view showing a zoom lens according to embodiment 1 of the present application in a telephoto end state.

As shown in fig. 1A, 1B and 1C, the zoom lens includes, in order from an object side to an image side along an optical axis: a first lens group G1, a second lens group G2, a third lens group G3, and a filter E8. The first lens group G1 consists of a first lens element E1 and a second lens element E2 arranged in order from the object side to the image side along the optical axis; the second lens group G2 is composed of, in order from the object side to the image side along the optical axis, a third lens element E3, a fourth lens element E4, and a fifth lens element E5; the third lens group G3 is composed of, in order from the object side to the image side along the optical axis, a sixth lens E6 and a seventh lens E7.

The first lens element E1 has negative 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 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 fifth lens element E5 has positive power, and has a convex object-side surface S9 and a convex image-side surface S10. The sixth lens element E6 has positive power, and has a concave object-side surface S11 and a convex image-side surface S12. The seventh lens element E7 has negative power, and has a concave object-side surface S13 and a concave image-side surface S14. Filter E8 has an object side S15 and an image side S16. The zoom lens has an imaging surface S17, and light from the object passes through the respective surfaces S1 to S16 in order and is finally imaged on the imaging surface S17.

Table 1 shows basic parameters of the zoom lens of embodiment 1, in which the units of the radius of curvature and the thickness/distance are both millimeters (mm).

TABLE 1

In embodiment 1, the object-side surface and the image-side surface of the first lens E1, the third lens E3, the fifth lens E5, the sixth lens E6 and the seventh lens E7 are all aspheric surfaces, and the surface type x of each aspheric surface lens can be defined by, but is not limited to, the following aspheric surface formula:

wherein x is the rise of the distance from the aspheric surface vertex to the aspheric surface vertex when the aspheric surface is at the position with the height of h along the optical axis direction; c is the paraxial curvature of the aspheric surface, c being 1/R (i.e., paraxial curvature c is the inverse of radius of curvature R in table 1 above); k is a conic coefficient; ai is the correction coefficient of the i-th order of the aspherical surface. The high-order term coefficients A usable for the aspherical mirror surfaces S1, S2, S5, S6 and S9 to S14 in example 1 are shown in the following tables 2-1 and 2-2₄、A₆、A₈、A₁₀、A₁₂、A₁₄、A₁₆、A₁₈、A₂₀、A₂₂、A₂₄、A₂₆、A₂₈And A₃₀。

Flour mark

A10

A12

A14

A16

-4.3520E-03

3.7583E-04

-2.8969E-06

-6.3792E-06

1.2629E-06

-1.3012E-07

7.7306E-09

-2.7315E-03

3.7739E-04

-2.2165E-05

-1.0910E-06

3.0131E-07

-1.0653E-08

-1.8019E-09

-6.8542E-06

1.0043E-04

-5.2670E-05

2.1959E-05

-5.6534E-06

8.9319E-07

-8.5398E-08

1.0324E-02

-1.1260E-03

1.5249E-04

-2.1269E-05

2.4399E-06

-2.0635E-07

1.0879E-08

1.2717E-02

-1.5358E-03

1.8544E-04

-1.9579E-05

2.1304E-06

-3.5269E-07

6.0003E-08

S10

7.9040E-04

4.1140E-04

-1.5784E-04

9.9303E-05

-3.6153E-05

8.0770E-06

-1.0679E-06

S11

2.9551E-03

3.7077E-04

-5.3106E-04

4.6629E-04

-2.5400E-04

8.9013E-05

-2.0389E-05

S12

-4.5934E-02

4.1911E-02

-3.5258E-02

2.5121E-02

-1.4035E-02

5.9515E-03

-1.8853E-03

S13

-3.0284E-02

1.2281E-02

-8.8192E-03

7.1602E-03

-4.8285E-03

2.4449E-03

-9.0592E-04

S14

5.8860E-04

-7.7023E-03

6.0338E-03

-3.2525E-03

1.2951E-03

-3.8130E-04

8.2410E-05

TABLE 2-1

Flour mark

A18

A20

A22

A24

A26

A28

A30

-2.4735E-10

3.2726E-12

0.0000E+00

1.8712E-10

-5.2363E-12

0.0000E+00

4.5340E-09

-1.0375E-10

0.0000E+00

-2.7413E-10

0.0000E+00

-5.7857E-09

2.2159E-10

0.0000E+00

S10

7.6799E-08

-2.3036E-09

0.0000E+00

S11

3.0539E-06

-2.9032E-07

1.6024E-08

-3.9350E-10

0.0000E+00

S12

4.3990E-04

-7.4122E-05

8.7318E-06

-6.7968E-07

3.1305E-08

-6.4392E-10

0.0000E+00

S13

2.4251E-04

-4.6111E-05

6.0493E-06

-5.1923E-07

2.6192E-08

-5.8786E-10

0.0000E+00

S14

-1.2933E-05

1.4480E-06

-1.1223E-07

5.7010E-09

-1.7019E-10

2.2562E-12

0.0000E+00

Tables 2 to 2

Table 3 below shows numerical values of some parameters of the zoom lens of embodiment 1 in the wide-angle end state, the intermediate end state, and the telephoto end state, respectively, including: the zoom lens comprises an effective focal length f of the zoom lens, an f-number Fno of the zoom lens, a maximum field angle FOV of the zoom lens, a distance TTL along the optical axis from the object side surface of the first lens in the first lens group of the zoom lens to the imaging surface of the zoom lens, a half ImgH of the diagonal length of the effective pixel area on the imaging surface of the zoom lens, a thickness/distance value of the row of S4 in table 1 (i.e., the distance on the optical axis from the image side surface of the second lens to the stop) D4, a thickness/distance value of the row of S10 in table 1 (i.e., the distance along the optical axis from the image side surface of the fifth lens to the object side surface of the sixth lens) D10, and a thickness/distance value of the row of S14 in table 1 (i.e., the distance along the optical axis from the image side surface of the seventh lens to the object side surface of the optical filter) D14.

Parameter/lens state	Wide angle end	Intermediate terminal	Long coke end
				f(mm)	12.52	19.24	24.03
Fno	2.67	3.63	4.20
				FOV(°)	36.66	23.96	19.18
TTL(mm)	25.46	25.46	25.46
				ImgH(mm)	4.06	4.06	4.06
D4(mm)	6.59	3.22	1.20
				D10(mm)	4.13	3.11	3.13
D14(mm)	3.07	7.46	9.46

TABLE 3

Fig. 2A-1, 2B-1, and 2C-1 show on-axis difference curves representing convergent focus deviations of light rays of different wavelengths after passing through the lens, in the wide-angle end state, the intermediate end state, and the telephoto end state, respectively, of the zoom lens of embodiment 1. Fig. 2A-2, 2B-2, and 2C-2 show astigmatism curves representing meridional field curvature and sagittal field curvature in the wide-angle end state, the intermediate end state, and the telephoto end state, respectively, of the zoom lens of embodiment 1. Fig. 2A to 3, 2B to 3, and 2C to 3 show distortion curves of the zoom lens of embodiment 1 in the wide-angle end state, the intermediate end state, and the telephoto end state, respectively, which represent values of distortion magnitudes corresponding to different image heights. Fig. 2A to 4, 2B to 4, and 2C to 4 show chromatic aberration of magnification curves representing deviations of different image heights on an imaging surface of light rays after passing through the lens in the zoom lens of embodiment 1 in the wide-angle end state, the intermediate end state, and the telephoto end state, respectively. As can be seen from fig. 2A-1 to 2A-4, 2B-1 to 2B-4, and 2C-1 to 2C-4, the zoom lens system of embodiment 1 can achieve good imaging quality.

Example 2

A zoom lens according to embodiment 2 of the present application is described below with reference to fig. 3A, 3B, 3C, 4A-1 to 4A-4, 4B-1 to 4B-4, and 4C-1 to 4C-4. In this embodiment and the following embodiments, descriptions of parts similar to those of embodiment 1 will be omitted for the sake of brevity. Fig. 3A shows a schematic configuration diagram of a zoom lens according to embodiment 2 of the present application in a wide-angle end state; fig. 3B shows a schematic configuration view of a zoom lens according to embodiment 2 of the present application in an intermediate end state; fig. 3C is a schematic structural view showing a zoom lens according to embodiment 2 of the present application in a telephoto end state.

As shown in fig. 3A, 3B and 3C, the zoom lens includes, in order from an object side to an image side along an optical axis: a first lens group G1, a second lens group G2, a third lens group G3, and a filter E8. The first lens group G1 consists of a first lens element E1 and a second lens element E2 arranged in order from the object side to the image side along the optical axis; the second lens group G2 is composed of, in order from the object side to the image side along the optical axis, a third lens element E3, a fourth lens element E4, and a fifth lens element E5; the third lens group G3 is composed of, in order from the object side to the image side along the optical axis, a sixth lens E6 and a seventh lens E7.

Table 4 shows basic parameters of the zoom lens of embodiment 2, in which the units of the radius of curvature and the thickness/distance are both millimeters (mm). Tables 5-1 and 5-2 show the high-order term coefficients A that can be used for the respective aspherical mirror surfaces S1, S2, S5, S6 and S9 to S14 in example 2₄、A₆、A₈、A₁₀、A₁₂、A₁₄、A₁₆、A₁₈、A₂₀、A₂₂、A₂₄、A₂₆、A₂₈And A₃₀Wherein each aspherical surface shape can be defined by the formula (1) given in the above-described embodiment 1.

TABLE 4

Flour mark

A10

A12

A14

A16

-4.1111E-03

3.7316E-04

-7.7642E-06

-5.7918E-06

1.3535E-06

-1.6206E-07

1.1286E-08

-2.6575E-03

3.6441E-04

-1.5750E-05

-4.5906E-06

1.3202E-06

-1.7598E-07

1.3331E-08

-2.3195E-04

9.3930E-05

-6.8824E-05

2.9849E-05

-8.3720E-06

1.4542E-06

-1.5441E-07

7.4491E-03

-7.5414E-04

7.4140E-05

-8.0236E-06

6.5767E-07

-5.2593E-08

3.3743E-09

8.0872E-03

-8.1146E-04

5.1301E-06

2.7688E-05

-8.7568E-06

1.4645E-06

-1.4145E-07

S10

2.8280E-04

7.4860E-04

-2.9376E-04

1.7644E-04

-6.8999E-05

1.7010E-05

-2.5186E-06

S11

3.4940E-03

2.3279E-04

-1.0645E-04

4.6625E-05

-1.9076E-05

5.6865E-06

-9.8898E-07

S12

-2.5499E-02

1.7698E-02

-1.0047E-02

4.5618E-03

-1.5237E-03

3.4977E-04

-5.1471E-05

S13

-1.8168E-02

4.9159E-03

-2.0678E-03

9.7398E-04

-3.9124E-04

1.0845E-04

-1.8568E-05

S14

-4.3436E-03

-2.1393E-03

1.5987E-03

-6.1614E-04

1.5271E-04

-2.4501E-05

2.4547E-06

TABLE 5-1

TABLE 5-2

Table 6 below shows numerical values of some parameters of the zoom lens of embodiment 2 in the wide-angle end state, the intermediate end state, and the telephoto end state, respectively, including: the zoom lens comprises an effective focal length f of the zoom lens, an f-number Fno of the zoom lens, a maximum field angle FOV of the zoom lens, a distance TTL along the optical axis from the object side surface of the first lens in the first lens group of the zoom lens to the imaging surface of the zoom lens, a half ImgH of the diagonal length of the effective pixel area on the imaging surface of the zoom lens, a thickness/distance value of the row of S4 in table 1 (i.e., the distance on the optical axis from the image side surface of the second lens to the stop) D4, a thickness/distance value of the row of S10 in table 1 (i.e., the distance along the optical axis from the image side surface of the fifth lens to the object side surface of the sixth lens) D10, and a thickness/distance value of the row of S14 in table 1 (i.e., the distance along the optical axis from the image side surface of the seventh lens to the object side surface of the optical filter) D14.

Parameter/lens state	Wide angle end	Intermediate terminal	Long coke end
				f(mm)	12.52	19.25	24.03
Fno	2.87	3.90	4.49
				FOV(°)	38.42	25.09	20.08
TTL(mm)	25.69	25.69	25.69
				ImgH(mm)	4.26	4.26	4.26
D4(mm)	7.01	3.56	1.50
				D10(mm)	3.39	2.48	2.44
D14(mm)	3.48	7.84	9.94

TABLE 6

Fig. 4A-1, 4B-1, and 4C-1 show on-axis difference curves representing convergent focus deviations of light rays of different wavelengths after passing through the lens for the zoom lens of embodiment 2 in the wide-angle end state, the intermediate end state, and the telephoto end state, respectively. Fig. 4A-2, 4B-2, and 4C-2 show astigmatism curves representing meridional field curvature and sagittal field curvature in the wide-angle end state, the middle end state, and the telephoto end state, respectively, of the zoom lens of embodiment 2. Fig. 4A-3, 4B-3, and 4C-3 show distortion curves of the zoom lens of embodiment 2 in the wide-angle end state, the intermediate end state, and the telephoto end state, respectively, which represent values of distortion magnitudes corresponding to different image heights. Fig. 4A to 4, 4B to 4, and 4C to 4 show chromatic aberration of magnification curves representing deviations of different image heights on an imaging surface of light rays after passing through the lens in the wide-angle end state, the intermediate end state, and the telephoto end state, respectively, of the zoom lens of embodiment 2. As can be seen from fig. 4A-1 to 4A-4, 4B-1 to 4B-4, and 4C-1 to 4C-4, the zoom lens system of embodiment 2 can achieve good imaging quality.

Example 3

A zoom lens according to embodiment 3 of the present application is described below with reference to fig. 5A, 5B, 5C, 6A-1 to 6A-4, 6B-1 to 6B-4, and 6C-1 to 6C-4. Fig. 5A shows a schematic configuration diagram of a zoom lens according to embodiment 3 of the present application in a wide-angle end state; fig. 5B shows a schematic configuration view of a zoom lens according to embodiment 3 of the present application in an intermediate end state; fig. 5C is a schematic structural view showing a zoom lens according to embodiment 3 of the present application in a telephoto end state.

As shown in fig. 5A, 5B and 5C, the zoom lens includes, in order from an object side to an image side along an optical axis: a first lens group G1, a second lens group G2, a third lens group G3, and a filter E8. The first lens group G1 consists of a first lens element E1 and a second lens element E2 arranged in order from the object side to the image side along the optical axis; the second lens group G2 is composed of, in order from the object side to the image side along the optical axis, a third lens element E3, a fourth lens element E4, and a fifth lens element E5; the third lens group G3 is composed of, in order from the object side to the image side along the optical axis, a sixth lens E6 and a seventh lens E7.

Table 7 shows basic parameters of the zoom lens of embodiment 3, in which the units of the radius of curvature and the thickness/distance are both millimeters (mm). Tables 8-1 and 8-2 show the high-order term coefficients A that can be used for the respective aspherical mirror surfaces S1, S2, S5, S6 and S9 to S14 in example 3₄、A₆、A₈、A₁₀、A₁₂、A₁₄、A₁₆、A₁₈、A₂₀、A₂₂、A₂₄、A₂₆、A₂₈And A₃₀Wherein each aspherical surface shape can be defined by the formula (1) given in the above-described embodiment 1.

TABLE 7

TABLE 8-1

Flour mark

A18

A20

A22

A24

A26

A28

A30

1.8005E-11

-7.7889E-13

0.0000E+00

5.0944E-10

-1.0055E-11

0.0000E+00

2.5281E-09

-5.8031E-11

0.0000E+00

-1.3763E-10

0.0000E+00

-1.0477E-08

3.4674E-10

0.0000E+00

S10

1.2481E-07

-3.9920E-09

0.0000E+00

S11

1.7845E-05

-2.0528E-06

1.3582E-07

-3.9287E-09

0.0000E+00

S12

7.6169E-04

-1.3702E-04

1.7349E-05

-1.4630E-06

7.3651E-08

-1.6728E-09

0.0000E+00

S13

-3.0961E-04

6.2261E-05

-8.5204E-06

7.5657E-07

-3.9274E-08

9.0398E-10

0.0000E+00

S14

-2.3044E-05

3.0785E-06

-2.8706E-07

1.7716E-08

-6.4963E-10

1.0709E-11

0.0000E+00

TABLE 8-2

Table 9 below shows numerical values of some parameters of the zoom lens of embodiment 3 in the wide-angle end state, the intermediate end state, and the telephoto end state, respectively, including: the zoom lens comprises an effective focal length f of the zoom lens, an f-number Fno of the zoom lens, a maximum field angle FOV of the zoom lens, a distance TTL along the optical axis from the object side surface of the first lens in the first lens group of the zoom lens to the imaging surface of the zoom lens, a half ImgH of the diagonal length of the effective pixel area on the imaging surface of the zoom lens, a thickness/distance value of the row of S4 in table 1 (i.e., the distance on the optical axis from the image side surface of the second lens to the stop) D4, a thickness/distance value of the row of S10 in table 1 (i.e., the distance along the optical axis from the image side surface of the fifth lens to the object side surface of the sixth lens) D10, and a thickness/distance value of the row of S14 in table 1 (i.e., the distance along the optical axis from the image side surface of the seventh lens to the object side surface of the optical filter) D14.

Parameter/lens state	Wide angle end	Intermediate terminal	Long coke end
				f(mm)	12.52	19.24	24.03
Fno	2.65	3.60	4.17
				FOV(°)	38.40	25.12	20.10
TTL(mm)	25.65	25.65	25.65
				ImgH(mm)	4.26	4.26	4.26
D4(mm)	6.88	3.37	1.30
				D10(mm)	3.47	2.49	2.47
D14(mm)	3.52	8.01	10.10

TABLE 9

Fig. 6A-1, 6B-1, and 6C-1 show on-axis difference curves representing convergent focus deviations of light rays of different wavelengths after passing through the lens for the zoom lens of embodiment 3 in the wide-angle end state, the intermediate end state, and the telephoto end state, respectively. Fig. 6A-2, 6B-2, and 6C-2 show astigmatic curves representing meridional field curvature and sagittal field curvature in the wide-angle end state, the intermediate end state, and the telephoto end state, respectively, of the zoom lens of embodiment 3. Fig. 6A-3, 6B-3, and 6C-3 show distortion curves of the zoom lens of embodiment 3 in the wide-angle end state, the intermediate end state, and the telephoto end state, respectively, which represent values of distortion magnitudes corresponding to different image heights. Fig. 6A-4, 6B-4, and 6C-4 show chromatic aberration of magnification curves representing deviations of different image heights on an imaging surface of light rays after passing through the lens, in the wide-angle end state, the intermediate end state, and the telephoto end state, respectively, of the zoom lens of embodiment 3. As can be seen from fig. 6A-1 to 6A-4, 6B-1 to 6B-4, and 6C-1 to 6C-4, the zoom lens according to embodiment 3 can achieve good imaging quality.

Example 4

A zoom lens according to embodiment 4 of the present application is described below with reference to fig. 7A, 7B, 7C, 8A-1 to 8A-4, 8B-1 to 8B-4, and 8C-1 to 8C-4. Fig. 7A shows a schematic configuration diagram of a zoom lens according to embodiment 4 of the present application in a wide-angle end state; fig. 7B shows a schematic configuration view of a zoom lens according to embodiment 4 of the present application in an intermediate end state; fig. 7C is a schematic structural view showing a zoom lens according to embodiment 4 of the present application in a telephoto end state.

As shown in fig. 7A, 7B and 7C, the zoom lens includes, in order from an object side to an image side along an optical axis: a first lens group G1, a second lens group G2, a third lens group G3, and a filter E8. The first lens group G1 consists of a first lens element E1 and a second lens element E2 arranged in order from the object side to the image side along the optical axis; the second lens group G2 is composed of, in order from the object side to the image side along the optical axis, a third lens element E3, a fourth lens element E4, and a fifth lens element E5; the third lens group G3 is composed of, in order from the object side to the image side along the optical axis, a sixth lens E6 and a seventh lens E7.

Table 10 shows basic parameters of the zoom lens of embodiment 4, in which the units of the radius of curvature and the thickness/distance are both millimeters (mm). Tables 11-1 and 11-2 show the coefficients A of the high-order terms which can be used for the aspherical mirror surfaces S1, S2, S5, S6 and S9 to S14 in example 4₄、A₆、A₈、A₁₀、A₁₂、A₁₄、A₁₆、A₁₈、A₂₀、A₂₂、A₂₄、A₂₆、A₂₈And A₃₀Wherein each aspherical surface shape can be defined by the formula (1) given in the above-described embodiment 1.

Watch 10

TABLE 11-1

Flour mark

A18

A20

A22

A24

A26

A28

A30

-1.6654E-07

1.3100E-08

-6.6355E-10

1.9530E-11

-2.5371E-13

0.0000E+00

8.6049E-09

-3.4836E-10

6.0534E-12

0.0000E+00

1.6880E-07

-1.1276E-08

4.3465E-10

-7.3616E-12

0.0000E+00

3.9069E-09

-9.4592E-11

0.0000E+00

2.3589E-06

-2.0467E-07

1.0197E-08

-2.2201E-10

0.0000E+00

S10

7.4956E-07

-4.9291E-08

1.4070E-09

0.0000E+00

S11

-5.5034E-05

9.9768E-06

-1.2110E-06

9.3849E-08

-4.1777E-09

8.0727E-11

0.0000E+00

S12

8.1081E-04

-1.5983E-04

2.2940E-05

-2.3267E-06

1.5809E-07

-6.4692E-09

1.2094E-10

S13

1.6008E-04

-2.4782E-05

2.0695E-06

-3.4096E-09

-1.7623E-08

1.5975E-09

-4.8396E-11

S14

-1.9412E-05

2.4428E-06

-2.2205E-07

1.4155E-08

-5.9952E-10

1.5140E-11

-1.7247E-13

TABLE 11-2

Table 12 below shows numerical values of some parameters of the zoom lens of embodiment 4 in the wide-angle end state, the intermediate end state, and the telephoto end state, respectively, including: the zoom lens comprises an effective focal length f of the zoom lens, an f-number Fno of the zoom lens, a maximum field angle FOV of the zoom lens, a distance TTL along the optical axis from the object side surface of the first lens in the first lens group of the zoom lens to the imaging surface of the zoom lens, a half ImgH of the diagonal length of the effective pixel area on the imaging surface of the zoom lens, a thickness/distance value of the row of S4 in table 1 (i.e., the distance on the optical axis from the image side surface of the second lens to the stop) D4, a thickness/distance value of the row of S10 in table 1 (i.e., the distance along the optical axis from the image side surface of the fifth lens to the object side surface of the sixth lens) D10, and a thickness/distance value of the row of S14 in table 1 (i.e., the distance along the optical axis from the image side surface of the seventh lens to the object side surface of the optical filter) D14.

Parameter/lens state	Wide angle end	Intermediate terminal	Long coke end
				f(mm)	12.52	19.24	24.02
Fno	2.62	3.56	4.09
				FOV(°)	38.32	25.05	20.03
TTL(mm)	25.41	25.41	25.41
				ImgH(mm)	4.26	4.26	4.26
D4(mm)	6.41	2.99	0.95
				D10(mm)	4.09	3.08	3.09
D14(mm)	3.07	7.50	9.53

TABLE 12

Fig. 8A-1, 8B-1, and 8C-1 show on-axis difference curves representing convergent focus deviations of light rays of different wavelengths after passing through the lens for the zoom lens of embodiment 4 in the wide-angle end state, the intermediate end state, and the telephoto end state, respectively. Fig. 8A-2, 8B-2, and 8C-2 show astigmatism curves representing meridional field curvature and sagittal field curvature in the wide-angle end state, the middle end state, and the telephoto end state, respectively, of the zoom lens of embodiment 4. Fig. 8A-3, 8B-3, and 8C-3 show distortion curves of the zoom lens of embodiment 4 in the wide-angle end state, the intermediate end state, and the telephoto end state, respectively, which represent values of distortion magnitudes corresponding to different image heights. Fig. 8A-4, 8B-4, and 8C-4 show chromatic aberration of magnification curves representing deviations of different image heights on an imaging surface of a lens after light passes through the lens, in the wide-angle end state, the intermediate end state, and the telephoto end state, respectively, of the zoom lens of embodiment 4. As can be seen from fig. 8A-1 to 8A-4, 8B-1 to 8B-4, and 8C-1 to 8C-4, the zoom lens according to embodiment 4 can achieve good imaging quality.

The conditional expressions in examples 1 to 4 satisfy the conditions shown in table 13, respectively.

Conditions/examples	1	2	3	4
					FT/(FG2-FG3)	1.23	1.33	1.25	1.24
(f1-f2)/FG1	2.71	2.63	2.71	2.58
					(R1+R2)/(R3+R4)	2.09	2.16	2.56	2.29
f5/f3	2.04	1.65	2.02	2.02
					(R7+R8)/f4	2.44	1.62	2.70	2.41
(N2+N4)	3.82	3.82	3.82	3.82
					(CT3+CT4+CT5)/(CT1+CT2+CT6+CT7)	1.52	1.59	1.56	1.45
(f6-f7)/(f6+f7)	1.91	2.09	1.99	1.87
					R11/R12	1.26	1.48	1.28	1.22
(R14-R13)/FW	2.05	1.21	2.12	2.05

Watch 13

The present application also provides an imaging Device, which is provided with an electron sensing element to form an image, wherein the electron sensing element may be a Charge Coupled Device (CCD) or a Complementary Metal Oxide Semiconductor (CMOS). The imaging device may be a stand-alone imaging device such as a digital camera, or may be an imaging module integrated on a mobile electronic device such as a mobile phone. The imaging device is equipped with the zoom lens described above.

The above description is only a preferred embodiment of the application and is illustrative of the principles of the technology employed. It will be appreciated by a person skilled in the art that the scope of protection covered by the present application is not limited to the embodiments with a specific combination of the features described above, but also covers other embodiments with any combination of the features described above or their equivalents without departing from the scope of the present application. For example, the above features may be replaced with (but not limited to) features having similar functions disclosed in the present application.

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