CN113126268A - Zoom lens group - Google Patents

Zoom lens group Download PDF

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Publication number
CN113126268A
CN113126268A CN202110537437.9A CN202110537437A CN113126268A CN 113126268 A CN113126268 A CN 113126268A CN 202110537437 A CN202110537437 A CN 202110537437A CN 113126268 A CN113126268 A CN 113126268A
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China
Prior art keywords
lens
lens group
zoom
zoom lens
group
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CN202110537437.9A
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Chinese (zh)
Inventor
杨泉锋
戴付建
赵烈烽
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Zhejiang Sunny Optics Co Ltd
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Zhejiang Sunny Optics Co Ltd
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Priority to CN202110537437.9A priority Critical patent/CN113126268A/en
Publication of CN113126268A publication Critical patent/CN113126268A/en
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    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B15/00—Optical objectives with means for varying the magnification
    • G02B15/14—Optical objectives with means for varying the magnification by axial movement of one or more lenses or groups of lenses relative to the image plane for continuously varying the equivalent focal length of the objective
    • G02B15/16—Optical objectives with means for varying the magnification by axial movement of one or more lenses or groups of lenses relative to the image plane for continuously varying the equivalent focal length of the objective with interdependent non-linearly related movements between one lens or lens group, and another lens or lens group
    • G02B15/163—Optical objectives with means for varying the magnification by axial movement of one or more lenses or groups of lenses relative to the image plane for continuously varying the equivalent focal length of the objective with interdependent non-linearly related movements between one lens or lens group, and another lens or lens group having a first movable lens or lens group and a second movable lens or lens group, both in front of a fixed lens or lens group
    • G02B15/167—Optical objectives with means for varying the magnification by axial movement of one or more lenses or groups of lenses relative to the image plane for continuously varying the equivalent focal length of the objective with interdependent non-linearly related movements between one lens or lens group, and another lens or lens group having a first movable lens or lens group and a second movable lens or lens group, both in front of a fixed lens or lens group having an additional fixed front lens or group of lenses
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B15/00—Optical objectives with means for varying the magnification
    • G02B15/14—Optical objectives with means for varying the magnification by axial movement of one or more lenses or groups of lenses relative to the image plane for continuously varying the equivalent focal length of the objective
    • G02B15/143—Optical objectives with means for varying the magnification by axial movement of one or more lenses or groups of lenses relative to the image plane for continuously varying the equivalent focal length of the objective having three groups only

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Nonlinear Science (AREA)
  • Lenses (AREA)

Abstract

The invention relates to a zoom lens assembly, wherein the lens assembly comprises the following components in sequence from an object side to an image side along an optical axis: the lens comprises a first lens group comprising a first lens, a second lens group comprising a diaphragm, a second lens with positive focal power, a third lens, a second lens group comprising a fourth lens with negative focal power and a fifth lens, and a third lens group comprising a sixth lens with positive focal power and a seventh lens; the lenses are not adhered to each other, the first lens group is fixed relative to an imaging surface, and the second lens group and the third lens group can move along the optical axis to realize continuous zooming. By adopting the structure, different lenses are distributed in different lens groups, and the focal power and the surface type of each lens are reasonably distributed, so that the lenses can show better imaging effect under different focal lengths, have smaller aberration, can balance the high-order aberration of the system, are favorable for matching the chief ray with the image plane, are suitable for being applied to portable electronic products, and have wide application prospect.

Description

Zoom lens group
Technical Field
The invention belongs to the technical field of optical imaging equipment, and particularly relates to a zoom lens group.
Background
Along with the development of society, electronic products such as mobile phones and panels have become indispensable tools in people's lives, optical imaging modules are also paid more and more attention from people as part of hardware, and designers have designed lenses with various characteristics according to the use requirements of people. The prior lens is a fixed focus lens which has a fixed focal length, can only shoot specific subject matters generally and is inconvenient to use.
Disclosure of Invention
The present invention is directed to a zoom lens assembly having a plurality of lens groups, which is convenient to use and carry, and has excellent image quality.
One aspect of the present invention provides a zoom lens group, comprising, in order from an object side to an image side along an optical axis of the zoom lens group:
a first lens group including a first lens;
the second lens group comprises a diaphragm, a second lens, a third lens, a fourth lens and a fifth lens, wherein the second lens has positive focal power, and the fourth lens has negative focal power;
the third lens group comprises a sixth lens and a seventh lens, wherein the sixth lens has positive focal power;
wherein the first lens, the second lens, the third lens, the fourth lens, the fifth lens, the sixth lens and the seventh lens are not adhered to each other;
the first lens group is fixed relative to an imaging surface, and the second lens group and the third lens group can move along the optical axis to realize continuous zooming of the zoom lens group.
According to an embodiment of the present invention, the effective focal length f1 of the first lens and the effective focal length f3 of the third lens satisfy: -4.5< f1/f3< -3.0.
According to one embodiment of the present invention, the zoom lens group has a maximum field angle | FOV at different zoom magnificationsWI satisfies: 25 degree<|FOVW|<52°。
According to one embodiment of the present invention, 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 satisfy: 0.5< R4/R3< 1.5.
According to one embodiment of the present invention, the effective focal length f3 of the third lens and the radius of curvature R5 of the object side surface of the third lens satisfy: 1.0< f3/R5< 2.0.
According to one embodiment of the present invention, the total focal length f of the zoom lens group at different zoom factorsWAnd the diameter EPD of the entrance pupil of the zoom lens group under different zoom factorsWSatisfies the following conditions: 2.0<fW/EPDW<4.0。
According to an embodiment of the present invention, a curvature radius R7 of an object-side surface of the fourth lens, a curvature radius R8 of an image-side surface of the fourth lens, and an effective focal length f4 of the fourth lens satisfy: -4.5< | R7+ R8|/f4< -0.5.
According to an embodiment of the present invention, an effective focal length f5 of the fifth lens and a curvature radius R10 of an image side surface of the fifth lens satisfy: -2.0< f5/R10< -1.0.
According to an embodiment of the present invention, a curvature radius R11 of the object-side surface of the sixth lens and a curvature radius R13 of the object-side surface of the seventh lens satisfy: 2.0< R11/R13< 3.0.
According to an embodiment of the present invention, the effective focal length f6 of the sixth lens, the effective focal length f7 of the seventh lens, and the radius of curvature R12 of the image side surface of the sixth lens satisfy: -2.0< (f6+ f7)/R12< -1.0.
According to an embodiment of the present invention, a central thickness CT3 of the third lens on the optical axis and a central thickness CT2 of the second lens on the optical axis satisfy: 1.0< CT3/CT2< 2.5.
According to an embodiment of the present invention, a center thickness CT4 of the fourth lens on the optical axis and an air interval T34 of the third lens and the fourth lens on the optical axis satisfy: 4.5< T34/CT4< 6.0.
According to an embodiment of the present invention, a central thickness CT6 of the sixth lens on the optical axis and a central thickness CT7 of the seventh lens on the optical axis satisfy: 4.5< CT6/CT7< 9.0.
According to an embodiment of the present invention, an air interval T45 of the fourth lens and the fifth lens on the optical axis and an air interval T67 of the sixth lens and the seventh lens on the optical axis satisfy: 1.0< T67/T45< 16.0.
According to an embodiment of the present invention, the zoom lens group satisfies the following conditional expression: 0< D1/D2< 6.0;
wherein D1 is the air space between the surface of the zoom lens group closest to the image side when the zoom lens group is located at the telephoto end and the diaphragm on the optical axis; d2 is the air space on the optical axis between the surface of the zoom lens group closest to the image side at the middle end and the surface of the zoom lens group closest to the object side at the telephoto end.
According to one embodiment of the present invention, the total focal length f of the zoom lens group at different zoom factorsWAnd the air space between the surface closest to the image side in the third lens group under different zoom factors and the optical filter on the optical axis satisfies the following conditions: 2.0<fW/D3≤66。
According to an embodiment of the present invention, the abbe number V1 of the first lens and the abbe number V2 of the second lens satisfy: V1-V2> 30.
The invention has the beneficial effects that:
the zoom lens system provided by the invention comprises the following components in sequence from an object side to an image side along an optical axis: the lens comprises a first lens group comprising a first lens, a second lens group comprising a diaphragm, a second lens with positive focal power, a third lens, a second lens group comprising a fourth lens with negative focal power and a fifth lens, and a third lens group comprising a sixth lens with positive focal power and a seventh lens; the first lens, the second lens, the third lens, the fourth lens, the fifth lens, the sixth lens and the seventh lens are not adhered to each other; the first lens group is fixed relative to an imaging surface, and the second lens group and the third lens group can move along the optical axis to realize continuous zooming of the zoom lens group. By distributing different lenses in different lens groups and reasonably distributing the focal power and the surface type of each lens, the lenses can show better imaging effect under different focal lengths, so that the zoom lens group has smaller aberration on an optical axis, and simultaneously can balance high-order aberration of the system, thereby being beneficial to matching the chief ray of the system comprising the zoom lens group with an image plane, and further achieving good imaging quality.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.
FIG. 1 is a schematic structural diagram of a zoom lens assembly according to embodiment 1 of the present invention at a telephoto end;
FIGS. 1a to 1d are diagrams illustrating an on-axis chromatic aberration curve, an astigmatic curve, a distortion curve, and a chromatic aberration of magnification curve, respectively, of the zoom lens group of FIG. 1 at a telephoto end;
FIG. 2 is a schematic diagram of a middle end zoom lens assembly according to embodiment 1 of the present invention;
fig. 2a to 2d respectively show an on-axis chromatic aberration curve, an astigmatism curve, a distortion curve, and a chromatic aberration of magnification curve at a middle end of the zoom lens group in fig. 2;
FIG. 3 is a schematic structural diagram of the zoom lens assembly according to embodiment 1 of the present invention at the telephoto end;
fig. 3a to 3d respectively show an on-axis chromatic aberration curve, an astigmatism curve, a distortion curve, and a chromatic aberration of magnification curve of the zoom lens group of fig. 3 at a telephoto end;
FIG. 4 is a schematic structural diagram of a zoom lens assembly according to embodiment 2 of the present invention at a telephoto end;
FIGS. 4a to 4d are graphs showing axial chromatic aberration, astigmatism, distortion and magnification chromatic aberration, respectively, of the zoom lens group of FIG. 4 at the telephoto end;
FIG. 5 is a schematic diagram of a middle end zoom lens assembly according to embodiment 2 of the present invention;
fig. 5a to 5d respectively show an on-axis chromatic aberration curve, an astigmatism curve, a distortion curve, and a chromatic aberration of magnification curve at a middle end of the zoom lens group in fig. 5;
FIG. 6 is a schematic structural diagram of a zoom lens assembly according to embodiment 2 of the present invention at the telephoto end;
fig. 6a to 6d respectively show an on-axis chromatic aberration curve, an astigmatism curve, a distortion curve, and a chromatic aberration of magnification curve at a telephoto end of the zoom lens group of fig. 6;
FIG. 7 is a schematic view of a zoom lens assembly according to embodiment 3 of the present invention;
FIGS. 7a to 7d are graphs showing axial chromatic aberration, astigmatism, distortion and magnification chromatic aberration, respectively, of the zoom lens group of FIG. 7 at the telephoto end;
FIG. 8 is a schematic diagram of a middle end zoom lens assembly according to embodiment 3 of the present invention;
fig. 8a to 8d respectively show an on-axis chromatic aberration curve, an astigmatism curve, a distortion curve, and a chromatic aberration of magnification curve at a middle end of the zoom lens group in fig. 8;
FIG. 9 is a schematic structural diagram of the zoom lens assembly according to embodiment 3 of the present invention at the telephoto end;
fig. 9a to 9d respectively show an on-axis chromatic aberration curve, an astigmatism curve, a distortion curve, and a chromatic aberration of magnification curve at a telephoto end of the zoom lens group of fig. 9;
FIG. 10 is a schematic structural diagram of a zoom lens module according to embodiment 4 of the present invention shown at the telephoto end;
FIGS. 10a to 10d are graphs showing axial chromatic aberration curves, astigmatism curves, distortion curves, and magnification chromatic aberration curves, respectively, of the zoom lens group of FIG. 10 at the telephoto end;
FIG. 11 is a schematic diagram of a middle end zoom lens assembly according to embodiment 4 of the present invention;
fig. 11a to 11d respectively show an on-axis chromatic aberration curve, an astigmatism curve, a distortion curve, and a chromatic aberration of magnification curve at a middle end of the zoom lens group in fig. 11;
FIG. 12 is a schematic structural diagram of the zoom lens assembly according to embodiment 4 of the present invention at the telephoto end;
fig. 12a to 12d respectively show an on-axis chromatic aberration curve, an astigmatism curve, a distortion curve, and a chromatic aberration of magnification curve at a telephoto end of the zoom lens group in fig. 12;
FIG. 13 is a schematic structural diagram of a zoom lens group according to embodiment 5 of the present invention at a telephoto end;
FIGS. 13a to 13d are graphs showing axial chromatic aberration curves, astigmatism curves, distortion curves, and magnification chromatic aberration curves, respectively, of the zoom lens group of FIG. 13 at the telephoto end;
FIG. 14 is a schematic diagram of a middle end zoom lens assembly according to embodiment 5 of the present invention;
fig. 14a to 14d respectively show an on-axis chromatic aberration curve, an astigmatism curve, a distortion curve, and a chromatic aberration of magnification curve at a middle end of the zoom lens group in fig. 14;
FIG. 15 is a schematic structural diagram of the zoom lens assembly according to embodiment 5 of the present invention at the telephoto end;
fig. 15a to 15d show an on-axis chromatic aberration curve, an astigmatism curve, a distortion curve, and a chromatic aberration of magnification curve, respectively, at a telephoto end of the zoom lens group in fig. 15.
Reference numerals
G1 first lens group; e1 first lens; s1 an object-side surface of the first lens; s2 an image-side surface of the first lens; g2 second lens group; an STO diaphragm; e2 second lens; s3 object side of the second lens; s4 an image side surface of the second lens; e3 third lens; s5 object side of the third lens; the image side surface of the third lens of S6; e4 fourth lens; s7 object side surface of the seventh lens; the image side surface of the eighth lens element of S8; e5 fifth lens; s9 object side of the ninth lens element; the image side surface of the tenth lens of S10; g3 third lens group; e6 sixth lens; s11 object side surface of sixth lens element; the image side surface of the sixth lens of S12; e7 seventh lens; s13 object side surface of the seventh lens; the image side surface of the seventh lens of S14; an E8 optical filter; the object side surface of the S15 optical filter; the image side surface of the S16 filter; s17 image forming plane.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be obtained by a person skilled in the art without any inventive step based on the embodiments of the present invention, are within the scope of the present invention.
It should be noted that in this specification, the expressions first, second, third, etc. are used only to distinguish one feature from another, and do not represent any limitation on the features. Thus, the first lens discussed below may also be referred to as the second lens or the third lens without departing from the teachings of the present invention.
It will be further understood that the terms "comprises," "comprising," "has," "having," "includes" and/or "including," when used in this specification, specify the presence of stated features, elements, and/or components, but do not preclude the presence or addition of one or more other features, elements, components, and/or groups thereof. Moreover, when a statement such as "at least one of" appears after a list of listed features, the entirety of the listed features is modified rather than modifying individual elements in the list. Furthermore, when describing embodiments of the present application, the use of "may" mean "one or more embodiments of the present application. Also, the term "exemplary" is intended to refer to an example or illustration.
In the drawings, the thickness, size, and shape of the lens have been slightly exaggerated for convenience of explanation. In particular, the shapes of the spherical or aspherical surfaces shown in the drawings are shown by way of example. That is, the shape of the spherical surface or the aspherical surface is not limited to the shape of the spherical surface or the aspherical surface shown in the drawings. The figures are purely diagrammatic and not drawn to scale.
In the description of the present invention, the paraxial region refers to a region near the optical axis. If the lens surface is convex and the convex position is not defined, it means that the lens surface is convex at least in the paraxial region. If the lens surface is concave and the concave position is not defined, it means that the lens surface is concave at least in the paraxial region. The surface of each lens closest to the object is called the object side surface of the lens, and the surface of each lens closest to the imaging surface is called the image side surface of the lens.
Unless otherwise defined, all terms (including technical and scientific terms) used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. It will be further understood that terms, such as those defined in commonly used dictionaries, should be interpreted as having a meaning that is consistent with their meaning in the context of the relevant art and will not be interpreted in an idealized or overly formal sense unless expressly so defined herein.
It should be noted that the embodiments and features of the embodiments may be combined with each other without conflict. Features, principles and other aspects of the present invention will be described in detail below with reference to the accompanying drawings in conjunction with embodiments.
Exemplary embodiments
The zoom lens group according to the exemplary embodiment of the present invention includes a first lens group G1, a second lens group G2, and a third lens group G3, which are disposed in order from an object side to an image side on an optical axis; wherein the first lens group includes a first lens; the second lens group comprises a diaphragm, a second lens, a third lens, a fourth lens and a fifth lens which are distributed on the optical axis, wherein the second lens has positive focal power, and the fourth lens has negative focal power; the third lens group comprises a sixth lens and a seventh lens, wherein the sixth lens has positive focal power;
wherein the first lens, the second lens, the third lens, the fourth lens, the fifth lens, the sixth lens and the seventh lens are not adhered to each other;
the first lens group is fixed relative to an imaging surface, and the second lens group and the third lens group can move along the optical axis to realize continuous zooming of the zoom lens group.
The lens distribution characteristics can carry out the zooming of the lens under the condition of ensuring the imaging quality; by distributing different lenses to different lens groups, each lens can show better imaging effect under different focal lengths; meanwhile, the system comprising the zoom lens group can have smaller aberration on the axis by reasonably distributing the focal power and the surface type of the lens in each lens group; moreover, the high-order aberration of the system can be balanced by reasonably distributing the focal power of the second lens and the fourth lens in the second lens group and the focal power of the sixth lens in the third lens group, and the matching of the chief ray of the system and the image plane is facilitated. By disposing the stop at the front end of the second lens in the second lens group, the chromatic aberration of the system including the zoom lens group can be improved.
The zoom lens group has continuous different zoom multiples, and the different zoom multiples can be divided into three states, namely when the lens group is at a telescopic end, at a middle end and at a telephoto end, the three different zoom states respectively comprise the zoom multiples in a certain range so as to meet different shooting requirements.
In the present exemplary embodiment, the effective focal length f1 of the first lens and the effective focal length f3 of the third lens satisfy the conditional expression: -4.5< f1/f3< -3.0. By reasonably controlling the ratio of the effective focal length of the first lens to the effective focal length of the third lens, the zoom lens group can still have a good imaging effect under different focal lengths. More specifically, f1 and f3 satisfy: -4.3< f1/f3< -3.03, for example, -4.13. ltoreq. f1/f 3. ltoreq. 3.06.
In the exemplary embodiment, the zoom lens group has a maximum field angle | FOV at different zoom magnificationsWThe conditional expression that | satisfies is: 25 degree<|FOVW|<52 degrees. The conditional expression restricts the visual angle of the optical system, so that the zoom lens group is in a smaller volume and is notThe zoom still has a better imaging range under the same zoom factor. More specific | FOVWI satisfies: 26.5 degree<|FOVW|<51.8, e.g., 28.4 ≦ FOVW|≤51.7°。
In the present exemplary embodiment, the conditional expression that 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 satisfy is: 0.5< R4/R3< 1.5. The ratio range between 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 is reasonably controlled, so that the sensitivity of the zoom lens group is favorably reduced, and the second lens is ensured to have good manufacturability. More specifically, R4 and R3 satisfy: 0.7< R4/R3<1.3, e.g., 0.94. ltoreq.R 4/R3. ltoreq.1.15.
In the present exemplary embodiment, the effective focal length f3 of the third lens and the radius of curvature R5 of the object side surface of the third lens satisfy the conditional expression: 1.0< f3/R5< 2.0. The ratio of the effective focal length of the third lens to the curvature radius of the object side surface is reasonably controlled within a certain range, so that the deflection angle of the marginal field of view at the third lens can be controlled, the sensitivity of the third lens to the zoom lens group is effectively reduced, the sensitivity of the zoom lens group is effectively reduced, and the performance of the zoom lens group is further ensured to a certain extent. More specifically, f3 and R5 satisfy: 1.30< f3/R5<1.95, e.g., 1.47. ltoreq. f 3/R5. ltoreq.1.92.
In the exemplary embodiment, the total focal length f of the zoom lens group at different zoom factorsWAnd the diameter EPD of the entrance pupil of the zoom lens group under different zoom factorsWThe satisfied conditional expression is: 2.0<fW/EPDW<4.0. The ratio of the total focal length of the zoom lens group to the entrance pupil diameter of the zoom lens group is controlled within a certain range, so that the image surface energy density can be effectively improved, and the signal-to-noise ratio of the output signal of the image sensor of the imaging device comprising the zoom lens group is improved. More specifically fWAnd EPDWSatisfies the following conditions: 2.15<fW/EPDW<4.2, e.g. 2.25 ≦ fW/EPDW≤4.4。
In the present exemplary embodiment, the radius of curvature R7 of the object-side surface of the fourth lens, the radius of curvature R8 of the image-side surface of the fourth lens, and the effective focal length f4 of the fourth lens satisfy the conditional expression: -4.5< | R7+ R8|/f4< -0.5. The ratio of the curvature radius R7 of the object side surface of the fourth lens element and the curvature radius R8 of the image side surface of the fourth lens element to the effective focal length f4 of the fourth lens element is controlled, so that the structure of the fourth lens element E4 is more reasonable, the processability of the fourth lens element is guaranteed, the yield of the zoom lens group is improved, and the production cost is reduced. More specifically, R7, R8 and f4 satisfy: -4.3< | R7+ R8|/f4< -0.6, for example, -4.05 ≦ R7+ R8|/f4 ≦ -0.72.
In the present exemplary embodiment, the effective focal length f5 of the fifth lens and the radius of curvature R10 of the image-side surface of the fifth lens satisfy the conditional expression: -2.0< f5/R10< -1.0. The ratio of the effective focal length of the fifth lens to the curvature radius of the object side surface of the fifth lens is controlled within a certain reasonable range, so that the deflection angle of the marginal field of view in the fifth lens can be controlled, and the sensitivity of the zoom lens group can be effectively reduced. More specifically, f5 and R10 satisfy: -1.99< f5/R10< -1.01, for example, -1.98. ltoreq. f 5/R10. ltoreq. 1.02.
In the present exemplary embodiment, the radius of curvature R11 of the object-side surface of the sixth lens and the radius of curvature R13 of the object-side surface of the seventh lens satisfy the conditional expression: 2.0< R11/R13< 3.0. The ratio of the curvature radius of the image side surface of the sixth lens to the curvature radius of the image side surface of the seventh lens is limited in a certain range, so that the stability of lens assembly is improved. More specifically, R11 and R13 satisfy: 2.02< R11/R13<2.8, e.g., 2.05. ltoreq.R 11/R13. ltoreq.2.67.
In the present exemplary embodiment, the effective focal length f6 of the sixth lens, the effective focal length f7 of the seventh lens, and the radius of curvature R12 of the image-side surface of the sixth lens satisfy the conditional expression: -2.0< (f6+ f7)/R12< -1.0. When the ratio of the effective focal length of the sixth lens element, the effective focal length of the seventh lens element, and the radius of curvature of the image-side surface of the sixth lens element is controlled within this range, curvature of field and distortion of the zoom lens assembly can be improved, and the difficulty of processing the sixth lens element can be controlled. More specifically, f6, f7 and R12 satisfy: -1.9< (f6+ f7)/R12< -1.3, for example, -1.78 ≦ (f6+ f7)/R12 ≦ -1.45.
In the present exemplary embodiment, the central thickness CT3 of the third lens on the optical axis and the central thickness CT2 of the second lens on the optical axis satisfy the conditional expression: 1.0< CT3/CT2< 2.5. By controlling the ratio between the center thickness of the second lens and the center thickness of the third lens, the molding characteristics of the second lens and the third lens can be ensured to some extent. More specifically, CT3 and CT2 satisfy: 1.22< CT3/CT2<2.48, e.g., 1.42 ≦ CT3/CT2 ≦ 2.46.
In the present exemplary embodiment, the central thickness CT4 of the fourth lens on the optical axis and the air interval T34 of the third lens and the fourth lens on the optical axis satisfy the conditional expression: 4.5< T34/CT4< 6.0. The air gaps among the lenses of the zoom lens group are reasonably distributed, the processing and assembling characteristics can be ensured, and the problems of front and rear lens interference and the like caused by the too small gap in the assembling process are avoided. Meanwhile, the optical zoom lens is beneficial to slowing down light deflection, adjusting the curvature of field of the zoom lens group, reducing the sensitivity and further obtaining better imaging quality. More specifically, T34 and CT4 satisfy: 4.7< T34/CT4<5.7, e.g., 4.97. ltoreq. T34/CT 4. ltoreq.5.57.
In the present exemplary embodiment, the central thickness CT6 of the sixth lens on the optical axis and the central thickness CT7 of the seventh lens on the optical axis satisfy the conditional expression: 4.5< CT6/CT7< 9.0. Through the ratio of controlling the center thickness of the sixth lens and the seventh lens, the forming characteristics of the two lenses can be ensured to a certain extent, so that the yield of the zoom lens group is further ensured, and the production cost is reduced. More specifically CT6 and CT7 satisfy: 4.6< CT6/CT7<8.8, e.g., 4.76 ≦ CT6/CT7 ≦ 8.66.
In the present exemplary embodiment, the air space T45 of the fourth lens and the fifth lens on the optical axis and the air space T67 of the sixth lens and the seventh lens on the optical axis satisfy the conditional expression: 1.0< T67/T45< 16.0. The conditional range is reasonably controlled, so that the light deflection degree is favorably slowed down, the sensitivity is reduced, and the imaging quality of the zoom lens group in a macro state can be ensured. More specific T67 and T45 satisfy: 1.2< T67/T45<15.57, e.g., 1.36 ≦ T67/T45 ≦ 15.54.
In the present exemplary embodiment, the zoom lens group satisfies the following conditional expression: 0< D1/D2< 6.0; wherein D1 is the air space between the surface of the zoom lens group closest to the image side when the zoom lens group is located at the telephoto end and the diaphragm on the optical axis; d2 is the air space on the optical axis between the surface of the zoom lens group closest to the image side at the middle end and the surface of the zoom lens group closest to the object side at the telephoto end. By controlling the ratio of D1 to D2, the method is beneficial to reducing the light deflection degree under different focal lengths, and can ensure the imaging quality of the zoom lens group under different focal lengths. More specifically D1 and D2 satisfy: 0.7< D1/D2<5.80, e.g., 0.11 ≦ D1/D2 ≦ 5.67.
In the exemplary embodiment, the total focal length f of the zoom lens group at different zoom factorsWThe air space between the surface closest to the image side in the third lens group and the optical filter on the optical axis under different zoom factors satisfies the following conditional expression: 2.0<fWthe/D3 is less than or equal to 66.0. The total focal length is separated from the surface of the third group closest to the image side and the air space of the optical filter on the optical axis, so that the chromatic aberration of the telephoto lens is reduced, and the telephoto lens has a better imaging effect. More specifically fWAnd D3 satisfies: 2.20<fW/D3<65.78, e.g., 2.48 ≦ fW/D3≤65.74。
In the present exemplary embodiment, the abbe number V1 of the first lens and the abbe number V2 of the second lens satisfy the conditional expression: V1-V2> 30. The sensitivity of light to the front two lenses can be reduced by reasonably controlling the abbe number of the first lens and the abbe number of the second lens, so that the zoom lens group has better imaging quality. More specifically, V1 and V2 satisfy: V1-V2>33, for example V1-V2 ≧ 35.7.
In the present exemplary embodiment, the above-described zoom lens group may further include an optical filter for correcting color deviation and/or a protective glass for protecting the photosensitive element located on the image plane.
The zoom lens group according to the above embodiment of the present invention may be used with a plurality of lenses, for example, the above seven lenses. Through the focal power of rational distribution each lens, face type, the center thickness of each lens and the interval on the optical axis between each lens etc. for zoom lens group can possess multiple different focus, be convenient for shoot the quilt of different themes thing, and possess good image quality, be applicable to portable electronic product.
In an exemplary embodiment, at least one of the mirror surfaces of each lens is an aspheric mirror surface, i.e., at least one of the object side surface of the first lens to the image side surface of the third lens is an aspheric mirror surface. The aspheric lens is characterized in that: the aspherical lens has a better curvature radius characteristic, and has advantages of improving distortion aberration and astigmatic aberration, unlike a spherical lens having a constant curvature from the lens center to the lens periphery, in which the curvature is continuously varied from the lens center to the lens periphery. After the aspheric lens is adopted, the aberration generated during imaging can be eliminated as much as possible, thereby improving the imaging quality. Optionally, at least one of the object-side surface and the image-side surface of each of the first lens to the seventh lens is an aspherical mirror surface. Optionally, the object-side surface and the image-side surface of each of the first lens to the seventh lens are aspheric mirror surfaces.
However, it will be understood by those skilled in the art that the number of lenses constituting the zoom lens group can be varied to achieve the various results and advantages described in the present specification without departing from the technical solutions claimed in the present application. For example, although seven lenses are exemplified in the embodiment, the optical imaging lens is not limited to include seven lenses, and may include other numbers of lenses if necessary.
Specific embodiments of an optical imaging lens suitable for the above-described embodiments are further described below with reference to the drawings. Each of the followingF1 in the embodiment refers to the effective focal length of the first lens E1 in millimeters (mm); f2 refers to the effective focal length of the second lens E2 in millimeters (mm); f3 refers to the effective focal length of third lens E3 in millimeters (mm); f4 refers to the effective focal length of fourth lens E4 in millimeters (mm); f5 refers to the effective focal length of fifth lens E5 in millimeters (mm); f6 refers to the effective focal length of the sixth lens E6 in millimeters (mm); f7 refers to the effective focal length of seventh lens E7 in millimeters (mm); TTL means the distance on the optical axis from the object side surface S1 to the image plane S17 of the first lens E1, in millimeters (mm); ImgH is a half of the diagonal length of the effective pixel area on the imaging plane S17 and is expressed in millimeters (mm); f. ofWThe total focal length of the zoom lens group under different zoom multiples is defined; | FOVWI is the maximum field angle of the zoom lens group under different zoom multiples, and the unit is DEG; HFOVWThe zoom lens group is half of the maximum field angle of the zoom lens group under different zoom multiples, and the unit is degree; EPDWThe diameter of the entrance pupil of the zoom lens group under different zoom multiples; r1 refers to the radius of curvature of the object-side surface of the first lens; r2 denotes the radius of curvature of the image-side surface of the first lens; r3 refers to the radius of curvature of the object-side surface of the second lens; r4 denotes the radius of curvature of the image-side surface of the second lens; r5 refers to the radius of curvature of the object-side surface of the third lens; r6 denotes a radius of curvature of the image-side surface of the third lens; r7 denotes the radius of curvature of the object-side surface of the fourth lens; r8 denotes a radius of curvature of the image-side surface of the fourth lens; r9 denotes the radius of curvature of the object-side surface of the fifth lens; r10 denotes a radius of curvature of the image-side surface of the fifth lens; r11 denotes a radius of curvature of the object side surface of the sixth lens; r12 denotes a radius of curvature of the image-side surface of the sixth lens element; r13 denotes a radius of curvature of the object side surface of the seventh lens; r14 denotes a radius of curvature of the image-side surface of the seventh lens; CT2 refers to the center thickness of the second lens on the optical axis; CT3 refers to the center thickness of the third lens on the optical axis; CT4 refers to the center thickness of the fourth lens on the optical axis; CT6 refers to the center thickness of the sixth lens on the optical axis; CT7 means the central thickness of said seventh lens on said optical axis; t34 meansAn air space between the third lens and the fourth lens on the optical axis; t45 denotes an air space between the fourth lens and the fifth lens on the optical axis; t67 denotes an air space between the sixth lens and the seventh lens on the optical axis; d1 is the air space between the surface closest to the image side and the diaphragm on the optical axis when the zoom lens group is located at the telephoto end under different zoom multiples; d2 is the air space on the optical axis between the surface closest to the image side of the zoom lens group at the middle end and the surface closest to the object side of the zoom lens group at the telephoto end, for different zoom factors; d3 is the air space D3 between the surface closest to the image side in the third lens group and the optical filter on the optical axis under different zoom factors; v1 denotes the abbe number of the first lens; v2 refers to the abbe number of the second lens.
Detailed description of the preferred embodiment 1
As shown in fig. 1 to fig. 3d, the structural schematic diagrams of the zoom lens set of embodiment 1 at the telephoto end, the middle end and the telephoto end, and the chromatic aberration curve, the astigmatism curve, the distortion curve and the chromatic aberration of magnification curve corresponding to the respective schematic diagrams are respectively described.
As shown in fig. 1, fig. 2 and fig. 3, the zoom lens assembly, in order from an object side to an image side, comprises: a first lens group G1, a second lens group G2, a third lens group G3, a filter E8 and an image plane S17. Wherein the first lens group G1 includes a first lens E1, and the second lens group G2 includes a stop STO, a second lens E2, a third lens E3, a fourth lens E4, and a fifth lens E5; the third lens group G3 includes a sixth lens E6 and a seventh lens E7. The lenses are not adhered to each other, and the third lens group moves along the optical axis direction along with the second lens group.
Meanwhile, in this embodiment, the object side surface S1 of the first lens element E1 is concave, and the image side surface S2 is convex; the second lens has positive focal power, and the object side surface S3 of the second lens E2 is convex, and the image side surface S4 is concave; the object-side surface S5 of the third lens element E3 is convex, and the image-side surface S6 is convex; the fourth lens has negative focal power, and the object side surface S7 of the fourth lens E4 is a concave surface, and the image side surface S8 is a concave surface; the object-side surface S9 of the fifth lens element E5 is convex, and the image-side surface S10 is convex; the sixth lens element has positive focal power, and the object-side surface S11 of the sixth lens element E6 is concave, and the image-side surface S12 is convex; the object side surface S13 of the seventh lens element E7 is concave, and the image side surface S14 is concave. Filter E8 has an object side S15 and an image side S16. The light from the object sequentially passes through the respective surfaces S1 to S16 and is finally imaged on the imaging plane S17.
As shown in table 1, which is a parameter table of each basic structure of the zoom lens group of embodiment 1, wherein the units of the radius of curvature, thickness/distance, focal length are all millimeters (mm), wherein OBJ denotes an object, the effective focal length f1 of the first lens E1 in the zoom lens group in this embodiment is-18.18 mm, the effective focal length f2 of the second lens E2 in the zoom lens group in this embodiment is 34.11mm, the effective focal length f3 of the third lens E3 in the zoom lens group in this embodiment is 5.33mm, the effective focal length f4 of the fourth lens E4 in the zoom lens group in this embodiment is-4.06 mm, the effective focal length f5 of the fifth lens E5 in the zoom lens group in this embodiment is 4.18mm, the effective focal length f6 of the sixth lens E6 in the zoom lens group in this embodiment is 10.79mm, the effective focal length f7 of the seventh lens E7 in the zoom lens group in this embodiment is-4.15 mm:
flour mark Surface type Radius of curvature Thickness of Focal length Refractive index Coefficient of dispersion Coefficient of cone
OBJ Spherical surface All-round All-round
S1 Aspherical surface -8.1370 0.2000 -18.18 1.55 56.1 3.4763
S2 Aspherical surface -45.5977 D1 97.8689
STO Spherical surface All-round 0.0300
S3 Aspherical surface 3.6524 0.4862 34.11 1.67 20.4 0.0076
S4 Aspherical surface 4.1191 0.1539 0.1248
S5 Aspherical surface 3.3885 1.1957 5.33 1.55 56.1 0.1932
S6 Aspherical surface -17.9712 1.0194 68.0661
S7 Aspherical surface -3.0806 0.2000 -4.06 1.64 19.2 -0.1391
S8 Aspherical surface 16.9289 0.1104 18.1211
S9 Aspherical surface 4.7545 0.9396 4.18 1.55 56.1 0.0777
S10 Aspherical surface -4.0768 D2 -0.2034
S11 Aspherical surface -8.5520 2.3177 10.79 1.68 19.2 5.4359
S12 Aspherical surface -4.3732 0.5266 0.8647
S13 Aspherical surface -3.3318 0.3669 -4.15 1.55 56.1 1.0413
S14 Aspherical surface 7.3777 D3 -39.7185
S15 Spherical surface All-round 0.2100 1.52 64.2
S16 Spherical surface All-round 0.0500
S17 Spherical surface All-round
TABLE 1
In this embodiment, the distance TTL on the optical axis from the object side surface S1 of the first lens E1 to the imaging surface S17 is 11.59mm, and the half ImgH of the diagonal length of the effective pixel region on the imaging surface S17 is 2.67 mm.
As shown in table 2, the parameters of the zoom lens group in embodiment 1 at the telephoto end, the middle end and the telephoto end are shown, wherein the total focal length f of the zoom lens group at different zoom factors is shownWThe unit of the air space D1 on the optical axis of the surface closest to the image side when the zoom lens group is positioned at the telephoto end and the diaphragm, the air space D2 on the optical axis of the surface closest to the image side when the zoom lens group is positioned at the middle end and the surface closest to the object side when the zoom lens group is positioned at the telephoto end under different zoom factors, and the unit of the air space D3 on the optical axis of the surface closest to the image side and the optical filter in the third lens group under different zoom factors are millimeters (mm), and the maximum field angle | FOV of the zoom lens group under different zoom factors is | FOV |WUnits of |Degree.
Figure BDA0003070316610000091
TABLE 2
The relationship of parameters between the respective lenses in the zoom lens group in this embodiment 1 is shown in the following table 3:
Figure BDA0003070316610000092
TABLE 3
In embodiment 1, the object-side surface and the image-side surface of any one of the first lens E1 through the seventh lens E7 are aspheric surfaces, and the surface shape x of each aspheric lens can be defined by, but is not limited to, the following aspheric surface formula:
Figure BDA0003070316610000093
wherein x is the rise of the distance from the aspheric surface vertex to the aspheric surface vertex when the aspheric surface is at the position with the height of h along the optical axis direction; c is the paraxial curvature of the aspheric surface, c being 1/R (i.e., paraxial curvature c is the inverse of radius of curvature R in table 1); k is a conic coefficient; ai is the correction coefficient of the i-th order of the aspheric surface.
In example 1, the object-side surface and the image-side surface of any one of the first lens E1 through the seventh lens E7 are aspheric, and table 4 shows the high-order term coefficients a4, A6, A8, a10, a12, a14, a16, a18, and a20 that can be used for the respective aspheric mirror surfaces S1 through S14 in example 1.
Figure BDA0003070316610000094
Figure BDA0003070316610000101
TABLE 4
FIG. 1a is a diagram showing an on-axis chromatic difference curve at the telephoto end of the zoom lens group in FIG. 1, which represents the convergent focus deviations of light rays of different wavelengths after passing through the zoom lens group; FIG. 1b shows astigmatism curves of the zoom lens group of FIG. 1 at the telephoto end, which represent meridional field curvature and sagittal field curvature; FIG. 1c is a distortion curve of the zoom lens set of FIG. 1 at the telephoto end, which represents values of distortion magnitudes corresponding to different angles of view; fig. 1d shows a chromatic aberration of magnification curve of the zoom lens group in fig. 1 at the telephoto end, which represents the deviation of different image heights on the imaging surface after light passes through the lens.
FIG. 2a shows an on-axis aberration curve at the intermediate end of the zoom lens group of FIG. 2, which represents the convergent focus deviations of light rays of different wavelengths after passing through the zoom lens group; FIG. 2b shows an astigmatism curve at the middle end of the zoom lens group of FIG. 2, which represents meridional field curvature and sagittal field curvature; fig. 2c shows a distortion curve of the zoom lens group in fig. 2 at the middle end, which represents values of distortion magnitude corresponding to different angles of view; fig. 2d shows a chromatic aberration of magnification curve at the middle end of the zoom lens group in fig. 2, which represents the deviation of different image heights of light rays on the image plane after passing through the lens.
FIG. 3a is a diagram showing an on-axis chromatic aberration curve at the telephoto end of the zoom lens group in FIG. 3, which represents a convergent focus deviation of light rays of different wavelengths after passing through the zoom lens group; FIG. 3b shows an astigmatism curve at the telephoto end of the zoom lens group of FIG. 3, which represents meridional field curvature and sagittal field curvature; fig. 3c shows a distortion curve of the zoom lens group of fig. 3 at the telephoto end, which represents values of distortion magnitudes corresponding to different angles of view; fig. 3d shows a chromatic aberration of magnification curve at the telephoto end of the zoom lens group in fig. 3, which represents the deviation of different image heights on the image plane after light passes through the lens.
As can be seen from fig. 1a to 3d, the zoom lens assembly of embodiment 1 can achieve good imaging quality.
Specific example 2
As shown in fig. 4 to 6d, the structural diagrams of the zoom lens assembly of embodiment 2 at the telephoto end, the middle end and the telephoto end, and the chromatic aberration curve, the astigmatism curve, the distortion curve and the chromatic aberration of magnification curve corresponding to the respective diagrams are respectively described.
As shown in fig. 4, 5 and 6, the zoom lens assembly, in order from an object side to an image side, comprises: a first lens group G1, a second lens group G2, a third lens group G3, a filter E8 and an image plane S17. Wherein the first lens group G1 includes a first lens E1, and the second lens group G2 includes a stop STO, a second lens E2, a third lens E3, a fourth lens E4, and a fifth lens E5; the third lens group G3 includes a sixth lens E6 and a seventh lens E7. The lenses are not adhered to each other, and the third lens group moves along the optical axis direction along with the second lens group.
Meanwhile, in this embodiment, the object side surface S1 of the first lens E1 is concave, and the image side surface S2 is concave; the second lens has positive focal power, and the object side surface S3 of the second lens E2 is convex, and the image side surface S4 is concave; the object-side surface S5 of the third lens element E3 is convex, and the image-side surface S6 is concave; the fourth lens has negative focal power, and the object-side surface S7 of the fourth lens E4 is a concave surface, and the image-side surface S8 is a convex surface; the object-side surface S9 of the fifth lens element E5 is concave, and the image-side surface S10 is convex; the sixth lens element has positive focal power, and the object-side surface S11 of the sixth lens element E6 is concave, and the image-side surface S12 is convex; the object side surface S13 of the seventh lens element E7 is concave, and the image side surface S14 is concave. Filter E8 has an object side S15 and an image side S16. The light from the object sequentially passes through the respective surfaces S1 to S16 and is finally imaged on the imaging plane S17.
As shown in table 5, which is a parameter table of each basic structure of the zoom lens group of embodiment 2, wherein the units of the radius of curvature, thickness/distance, focal length are all millimeters (mm), where OBJ denotes an object, the effective focal length f1 of the first lens E1 in the zoom lens group in this embodiment is-18.84 mm, the effective focal length f2 of the second lens E2 in the zoom lens group in this embodiment is 97.90mm, the effective focal length f3 of the third lens E3 in the zoom lens group in this embodiment is 4.85mm, the effective focal length f4 of the fourth lens E4 in the zoom lens group in this embodiment is-5.41 mm, the effective focal length f5 of the fifth lens E5 in the zoom lens group in this embodiment is 4.93mm, the effective focal length f6 of the sixth lens E6 in the zoom lens group in this embodiment is 14.13mm, the effective focal length f7 of the seventh lens E7 in the zoom lens group in this embodiment is-4.79 mm:
flour mark Surface type Radius of curvature Thickness/distance Focal length Refractive index Coefficient of dispersion Coefficient of cone
OBJ Spherical surface All-round All-round
S1 Aspherical surface -24.0837 0.2000 -18.84 1.55 56.1 -24.9468
S2 Aspherical surface 17.9983 D1 -34.6198
STO Spherical surface All-round 0.0300
S3 Aspherical surface 3.4125 0.7921 97.90 1.67 20.4 0.0686
S4 Aspherical surface 3.2662 0.0300 0.1045
S5 Aspherical surface 2.5518 1.1574 4.85 1.55 56.1 0.1529
S6 Aspherical surface 60.0000 0.9950 99.0000
S7 Aspherical surface -2.2244 0.2000 -5.41 1.64 19.2 0.1880
S8 Aspherical surface -6.4273 0.0635 8.3057
S9 Aspherical surface -30.0000 0.7519 4.93 1.55 56.1 99.0000
S10 Aspherical surface -2.4898 D2 -0.0689
S11 Aspherical surface -9.0783 2.8437 14.13 1.68 19.2 7.4569
S12 Aspherical surface -5.2487 0.6430 1.5873
S13 Aspherical surface -3.9884 0.3282 -4.79 1.55 56.1 1.6061
S14 Aspherical surface 7.7913 D3 -33.2579
S15 Spherical surface All-round 0.2100 1.52 64.2
S16 Spherical surface All-round 0.0500
S17 Spherical surface All-round
TABLE 5
In this embodiment, the distance TTL on the optical axis from the object side surface S1 of the first lens E1 to the imaging surface S17 is 10.54mm, and the half ImgH of the diagonal length of the effective pixel area on the imaging surface S17 is 2.67 mm.
As shown in table 6, the parameters of the zoom lens group in embodiment 2 at the telephoto end, the middle end and the telephoto end are shown, wherein the total focal length f of the zoom lens group at different zoom factors is shownWThe unit of the air space D1 on the optical axis of the surface closest to the image side when the zoom lens group is positioned at the telephoto end and the diaphragm, the air space D2 on the optical axis of the surface closest to the image side when the zoom lens group is positioned at the middle end and the surface closest to the object side when the zoom lens group is positioned at the telephoto end under different zoom factors, and the unit of the air space D3 on the optical axis of the surface closest to the image side and the optical filter in the third lens group under different zoom factors are millimeters (mm), and the maximum field angle | FOV of the zoom lens group under different zoom factors is | FOV |WThe unit of | is degree.
Figure BDA0003070316610000121
TABLE 6
The relationship of parameters between the respective lenses in the zoom lens group in this embodiment 2 is shown in the following table 7:
Figure BDA0003070316610000122
TABLE 7
In example 2, the object-side surface and the image-side surface of any one of the first lens E1 to the seventh lens E7 are aspheric, and table 8 shows the high-order term coefficients a4, A6, A8, a10, a12, a14, a16, a18, and a20 that can be used for the respective aspheric mirror surfaces S1 to S14 in example 2.
Figure BDA0003070316610000123
Figure BDA0003070316610000131
TABLE 8
FIG. 4a is a diagram showing an on-axis chromatic difference curve at the telephoto end of the zoom lens group in FIG. 4, which represents the convergent focus deviations of light rays of different wavelengths after passing through the zoom lens group; FIG. 4b shows astigmatism curves of the zoom lens group in FIG. 4 at the telephoto end, which represent meridional field curvature and sagittal field curvature; FIG. 4c is a distortion curve at the telephoto end of the zoom lens group in FIG. 4, which shows distortion magnitude values corresponding to different angles of view; fig. 4d shows a chromatic aberration of magnification curve at the telephoto end of the zoom lens group in fig. 4, which represents the deviation of different image heights on the imaging surface after light passes through the lens.
FIG. 5a shows an on-axis aberration curve at the intermediate end of the zoom lens group of FIG. 5, which represents the convergent focus deviations of light rays of different wavelengths after passing through the zoom lens group; FIG. 5b shows an astigmatism curve at the middle end of the zoom lens group of FIG. 5, which represents meridional field curvature and sagittal field curvature; fig. 5c shows a distortion curve at the middle end of the zoom lens group in fig. 5, which represents values of distortion magnitude corresponding to different angles of view; fig. 5d shows a chromatic aberration of magnification curve at the middle end of the zoom lens group in fig. 5, which represents the deviation of different image heights on the image plane after light passes through the lens.
FIG. 6a is a diagram showing an on-axis chromatic aberration curve at the telephoto end of the zoom lens group in FIG. 6, which represents a convergent focus deviation of light rays of different wavelengths after passing through the zoom lens group; FIG. 6b shows an astigmatism curve at the telephoto end of the zoom lens group in FIG. 6, which represents meridional field curvature and sagittal field curvature; fig. 6c shows a distortion curve of the zoom lens group in fig. 6 at the telephoto end, which represents values of distortion magnitudes corresponding to different angles of view; fig. 6d shows a chromatic aberration of magnification curve at the telephoto end of the zoom lens group in fig. 6, which represents the deviation of different image heights on the image plane after light passes through the lens.
As can be seen from fig. 4a to 6d, the zoom lens assembly of embodiment 2 can achieve good imaging quality.
Specific example 3
As shown in fig. 7 to 9d, the structural diagrams of the zoom lens assembly of embodiment 3 at the telephoto end, the middle end and the telephoto end, and the chromatic aberration curve, the astigmatism curve, the distortion curve and the chromatic aberration of magnification curve corresponding to the respective diagrams are respectively described.
As shown in fig. 7, 8 and 9, the zoom lens assembly, in order from an object side to an image side, comprises: a first lens group G1, a second lens group G2, a third lens group G3, a filter E8 and an image plane S17. Wherein the first lens group G1 includes a first lens E1, and the second lens group G2 includes a stop STO, a second lens E2, a third lens E3, a fourth lens E4, and a fifth lens E5; the third lens group G3 includes a sixth lens E6 and a seventh lens E7. The lenses are not adhered to each other, and the third lens group moves along the optical axis direction along with the second lens group.
Meanwhile, in this embodiment, the object side surface S1 of the first lens E1 is concave, and the image side surface S2 is concave; the second lens has positive focal power, and the object side surface S3 of the second lens E2 is convex, and the image side surface S4 is concave; the object-side surface S5 of the third lens element E3 is convex, and the image-side surface S6 is concave; the fourth lens has negative focal power, and the object side surface S7 of the fourth lens E4 is a concave surface, and the image side surface S8 is a concave surface; the object-side surface S9 of the fifth lens element E5 is convex, and the image-side surface S10 is convex; the sixth lens element has positive focal power, and the object-side surface S11 of the sixth lens element E6 is concave, and the image-side surface S12 is convex; the object side surface S13 of the seventh lens element E7 is concave, and the image side surface S14 is concave. Filter E8 has an object side S15 and an image side S16. The light from the object sequentially passes through the respective surfaces S1 to S16 and is finally imaged on the imaging plane S17.
As shown in table 9, which is a parameter table of each basic structure of the zoom lens group of embodiment 3, wherein the units of the radius of curvature, thickness/distance, focal length are all millimeters (mm), wherein OBJ denotes an object, the effective focal length f1 of the first lens E1 in the zoom lens group in this embodiment is-18.20 mm, the effective focal length f2 of the second lens E2 in the zoom lens group in this embodiment is 29.00mm, the effective focal length f3 of the third lens E3 in the zoom lens group in this embodiment is 5.94mm, the effective focal length f4 of the fourth lens E4 in the zoom lens group in this embodiment is-4.17 mm, the effective focal length f5 of the fifth lens E5 in the zoom lens group in this embodiment is 3.96mm, the effective focal length f6 of the sixth lens E6 in the zoom lens group in this embodiment is 11.47mm, the effective focal length f7 of the seventh lens E7 in the zoom lens group in this embodiment is-4.29 mm:
Figure BDA0003070316610000141
TABLE 9
In the embodiment, the distance TTL on the optical axis from the object side surface S1 of the first lens E1 to the imaging surface S17 is 11.61mm, and the half ImgH of the diagonal line length of the effective pixel region on the imaging surface S17 is 2.67 mm.
As shown in Table 10, it shows the parameters of the zoom lens group of embodiment 3 at the telephoto end, the middle end and the telephoto end, respectively, wherein the total focal length f of the zoom lens group at different zoom factorsWThe unit of the air space D1 on the optical axis of the surface closest to the image side when the zoom lens group is positioned at the telephoto end and the diaphragm, the air space D2 on the optical axis of the surface closest to the image side when the zoom lens group is positioned at the middle end and the surface closest to the object side when the zoom lens group is positioned at the telephoto end under different zoom factors, and the unit of the air space D3 on the optical axis of the surface closest to the image side and the optical filter in the third lens group under different zoom factors are millimeters (mm), and the maximum field angle | FOV of the zoom lens group under different zoom factors is | FOV |WThe unit of | is degree.
Figure BDA0003070316610000151
Watch 10
The relationship of parameters between the respective lenses in the zoom lens group in this embodiment 3 is shown in the following table 11:
Figure BDA0003070316610000152
TABLE 11
In example 3, the object-side surface and the image-side surface of any one of the first lens E1 to the seventh lens E7 are aspheric, and table 12 shows the high-order term coefficients a4, A6, A8, a10, a12, a14, a16, a18, and a20 that can be used for the respective aspheric mirror surfaces S1 to S14 in example 3.
Figure BDA0003070316610000153
Figure BDA0003070316610000161
TABLE 12
FIG. 7a is a diagram showing an on-axis chromatic difference curve at the telephoto end of the zoom lens group in FIG. 7, which represents the convergent focus deviations of light rays of different wavelengths after passing through the zoom lens group; FIG. 7b shows astigmatic curves of the zoom lens group of FIG. 7 at the telephoto end, which represent meridional field curvature and sagittal field curvature; FIG. 7c is a distortion curve at the telephoto end of the zoom lens group in FIG. 7, which shows distortion magnitude values corresponding to different angles of view; fig. 7d shows a chromatic aberration of magnification curve at the telephoto end of the zoom lens group in fig. 7, which represents the deviation of different image heights on the imaging surface after light passes through the lens.
FIG. 8a shows an on-axis aberration curve at the intermediate end of the zoom lens group in FIG. 8, which represents the convergent focus deviations of light rays of different wavelengths after passing through the zoom lens group; FIG. 8b shows an astigmatism curve at the middle end of the zoom lens group of FIG. 8, which represents meridional field curvature and sagittal field curvature; fig. 8c shows a distortion curve at the middle end of the zoom lens group in fig. 8, which represents values of distortion magnitude corresponding to different angles of view; fig. 8d shows a chromatic aberration of magnification curve at the middle end of the zoom lens group in fig. 8, which represents the deviation of different image heights on the image plane after light passes through the lens.
FIG. 9a is a diagram showing an on-axis chromatic aberration curve at the telephoto end of the zoom lens group in FIG. 9, which represents a convergent focus deviation of light rays of different wavelengths after passing through the zoom lens group; FIG. 9b shows an astigmatism curve at the telephoto end of the zoom lens group in FIG. 9, which represents meridional field curvature and sagittal field curvature; fig. 9c shows a distortion curve of the zoom lens group in fig. 9 at the telephoto end, which represents values of distortion magnitudes corresponding to different angles of view; fig. 9d shows a chromatic aberration of magnification curve at the telephoto end of the zoom lens group in fig. 9, which represents the deviation of different image heights on the image plane after light passes through the lens.
As can be seen from fig. 7a to 9d, the zoom lens group according to embodiment 3 can achieve good imaging quality.
Specific example 4
As shown in fig. 10 to 12d, the structural diagrams of the zoom lens assembly of embodiment 4 at the telephoto end, the middle end and the telephoto end, and the chromatic aberration curve, the astigmatism curve, the distortion curve and the chromatic aberration of magnification curve corresponding to the respective diagrams are respectively described.
As shown in fig. 10, 11 and 12, the zoom lens assembly, in order from an object side to an image side, comprises: a first lens group G1, a second lens group G2, a third lens group G3, a filter E8 and an image plane S17. Wherein the first lens group G1 includes a first lens E1, and the second lens group G2 includes a stop STO, a second lens E2, a third lens E3, a fourth lens E4, and a fifth lens E5; the third lens group G3 includes a sixth lens E6 and a seventh lens E7. The lenses are not adhered to each other, and the third lens group moves along the optical axis direction along with the second lens group.
Meanwhile, in this embodiment, the object side surface S1 of the first lens element E1 is concave, and the image side surface S2 is convex; the second lens has positive focal power, and the object side surface S3 of the second lens E2 is convex, and the image side surface S4 is concave; the object-side surface S5 of the third lens element E3 is convex, and the image-side surface S6 is convex; the fourth lens has negative focal power, and the object side surface S7 of the fourth lens E4 is a concave surface, and the image side surface S8 is a concave surface; the object-side surface S9 of the fifth lens element E5 is convex, and the image-side surface S10 is convex; the sixth lens element has positive focal power, and the object-side surface S11 of the sixth lens element E6 is concave, and the image-side surface S12 is convex; the object-side surface S13 of the seventh lens element E7 is concave, and the image-side surface S14 is convex. Filter E8 has an object side S15 and an image side S16. The light from the object sequentially passes through the respective surfaces S1 to S16 and is finally imaged on the imaging plane S17.
As shown in table 13, which is a parameter table of each basic structure of the zoom lens group of embodiment 4, wherein the units of the radius of curvature, thickness/distance, focal length are all millimeters (mm), where OBJ denotes an object, the effective focal length f1 of the first lens E1 in the zoom lens group in this embodiment is-17.90 mm, the effective focal length f2 of the second lens E2 in the zoom lens group in this embodiment is 37.89mm, the effective focal length f3 of the third lens E3 in the zoom lens group in this embodiment is 5.15mm, the effective focal length f4 of the fourth lens E4 in the zoom lens group in this embodiment is-3.81 mm, the effective focal length f5 of the fifth lens E5 in the zoom lens group in this embodiment is 4.04mm, the effective focal length f6 of the sixth lens E6 in the zoom lens group in this embodiment is 12.23mm, the effective focal length f7 of the seventh lens E7 in the zoom lens group in this embodiment is-5.46 mm:
Figure BDA0003070316610000171
watch 13
In this embodiment, the distance TTL on the optical axis from the object side surface S1 of the first lens E1 to the imaging surface S17 is 12.50mm, and the half ImgH of the diagonal length of the effective pixel region on the imaging surface S17 is 2.67 mm.
As shown in table 14, the parameters of the zoom lens group in embodiment 4 at the telephoto end, the middle end and the telephoto end are shown, respectively, wherein the total focal length f of the zoom lens group at different zoom factors is shownWThe zoom lens under different zoom multiplesThe unit of the air space D1 between the surface closest to the image side and the diaphragm on the optical axis when the group is positioned at the telephoto end, the air space D2 between the surface closest to the image side when the zoom lens group is positioned at the middle end and the surface closest to the object side when the zoom lens group is positioned at the telephoto end on the optical axis, the unit of the air space D3 between the surface closest to the image side and the optical filter on the optical axis in the third lens group under different zoom factors are millimeters (mm), and the maximum field angle | FOV of the zoom lens group under different zoom factors isWThe unit of | is degree.
Figure BDA0003070316610000181
TABLE 14
The relationship of parameters between the respective lenses in the zoom lens group in this embodiment 4 is shown in the following table 15:
Figure BDA0003070316610000182
watch 15
In example 4, the object-side surface and the image-side surface of any one of the first lens E1 to the seventh lens E7 are aspheric, and table 16 shows the high-order term coefficients a4, A6, A8, a10, a12, a14, a16, a18, and a20 that can be used for the respective aspheric mirror surfaces S1 to S14 in example 4.
Figure BDA0003070316610000183
Figure BDA0003070316610000191
TABLE 16
FIG. 10a is a view showing an on-axis chromatic difference curve at the telephoto end of the zoom lens group in FIG. 10, which represents a convergent focus deviation of light rays of different wavelengths after passing through the zoom lens group; FIG. 10b shows astigmatic curves of the zoom lens group of FIG. 10 at the telephoto end, which represent meridional field curvature and sagittal field curvature; FIG. 10c is a distortion curve at the telephoto end of the zoom lens group in FIG. 10, which shows values of distortion magnitudes for different angles of view; fig. 10d shows a chromatic aberration of magnification curve at the telephoto end of the zoom lens group in fig. 10, which represents the deviation of different image heights on the imaging surface after light passes through the lens.
FIG. 11a is a diagram showing an on-axis aberration curve at the intermediate end of the zoom lens group of FIG. 11, which represents a convergent focus deviation of light rays of different wavelengths after passing through the zoom lens group; FIG. 11b shows an astigmatism curve at the middle end of the zoom lens group of FIG. 11, which represents meridional field curvature and sagittal field curvature; fig. 11c shows a distortion curve at the middle end of the zoom lens group in fig. 11, which represents values of distortion magnitude corresponding to different angles of view; fig. 11d shows a chromatic aberration of magnification curve at the middle end of the zoom lens group in fig. 11, which represents the deviation of different image heights on the image plane after light passes through the lens.
FIG. 12a shows an on-axis aberration curve at the telephoto end of the zoom lens group in FIG. 12, which represents a convergent focus deviation of light rays of different wavelengths after passing through the zoom lens group; FIG. 12b shows an astigmatism curve at the telephoto end of the zoom lens group in FIG. 12, which represents meridional field curvature and sagittal field curvature; fig. 12c shows a distortion curve of the zoom lens group in fig. 12 at the telephoto end, which represents distortion magnitude values corresponding to different angles of view; fig. 12d shows a chromatic aberration of magnification curve at the telephoto end of the zoom lens group in fig. 12, which represents the deviation of different image heights on the image plane after light passes through the lens.
As can be seen from fig. 10a to 12d, the zoom lens group according to embodiment 4 can achieve good imaging quality.
Specific example 5
As shown in fig. 13 to fig. 15d, the structural diagrams of the zoom lens assembly of embodiment 5 at the telephoto end, the middle end and the telephoto end, and the chromatic aberration curve, the astigmatism curve, the distortion curve and the chromatic aberration of magnification curve corresponding to the respective diagrams are respectively described.
As shown in fig. 13, 14 and 15, the zoom lens assembly, in order from an object side to an image side, comprises: a first lens group G1, a second lens group G2, a third lens group G3, a filter E8 and an image plane S17. Wherein the first lens group G1 includes a first lens E1, and the second lens group G2 includes a stop STO, a second lens E2, a third lens E3, a fourth lens E4, and a fifth lens E5; the third lens group G3 includes a sixth lens E6 and a seventh lens E7. The lenses are not adhered to each other, and the third lens group moves along the optical axis direction along with the second lens group.
Meanwhile, in this embodiment, the object side surface S1 of the first lens E1 is concave, and the image side surface S2 is concave; the second lens has positive focal power, and the object side surface S3 of the second lens E2 is convex, and the image side surface S4 is concave; the object-side surface S5 of the third lens element E3 is convex, and the image-side surface S6 is convex; the fourth lens has negative focal power, and the object side surface S7 of the fourth lens E4 is a concave surface, and the image side surface S8 is a concave surface; the object-side surface S9 of the fifth lens element E5 is convex, and the image-side surface S10 is convex; the sixth lens element has positive focal power, and the object-side surface S11 of the sixth lens element E6 is concave, and the image-side surface S12 is convex; the object-side surface S13 of the seventh lens element E7 is concave, and the image-side surface S14 is convex. Filter E8 has an object side S15 and an image side S16. The light from the object sequentially passes through the respective surfaces S1 to S16 and is finally imaged on the imaging plane S17.
As shown in table 17, which is a parameter table of each basic structure of the zoom lens group of embodiment 5, wherein the units of the radius of curvature, thickness/distance, focal length are all in millimeters (mm), where OBJ denotes an object, the effective focal length f1 of the first lens E1 in the zoom lens group in this embodiment is-15.93 mm, the effective focal length f2 of the second lens E2 in the zoom lens group in this embodiment is 156.25mm, the effective focal length f3 of the third lens E3 in the zoom lens group in this embodiment is 3.85mm, the effective focal length f4 of the fourth lens E4 in the zoom lens group in this embodiment is-2.90 mm, the effective focal length f5 of the fifth lens E5 in the zoom lens group in this embodiment is 3.74mm, the effective focal length f6 of the sixth lens E6 in the zoom lens group in this embodiment is 9.35mm, the effective focal length f7 of the seventh lens E7 in the zoom lens group in this embodiment is-4.81 mm:
flour mark Surface type Radius of curvature Thickness/distance Focal length Refractive index Coefficient of dispersion Coefficient of cone
OBJ Spherical surface All-round All-round
S1 Aspherical surface -14.2672 0.2000 -15.93 1.55 56.1 3.9072
S2 Aspherical surface 22.3788 D1 -29.1355
STO Spherical surface All-round 0.0300
S3 Aspherical surface 3.4189 0.7668 156.25 1.67 20.4 -0.0635
S4 Aspherical surface 3.2176 0.0300 0.1535
S5 Aspherical surface 2.6137 1.0907 3.85 1.55 56.1 0.1619
S6 Aspherical surface -9.1895 1.1133 -84.5254
S7 Aspherical surface -2.9760 0.2000 -2.90 1.64 19.2 -0.5334
S8 Aspherical surface 5.0540 0.3167 -2.0295
S9 Aspherical surface 5.5284 1.1584 3.74 1.55 56.1 -1.1188
S10 Aspherical surface -3.0022 D2 -0.5644
S11 Aspherical surface -5.2494 1.1424 9.35 1.68 19.2 2.0350
S12 Aspherical surface -3.1235 0.4296 0.1626
S13 Aspherical surface -2.5581 0.2000 -4.81 1.55 56.1 0.3361
S14 Aspherical surface -99.0081 D3 -94.5023
S15 Spherical surface All-round 0.2100 1.52 64.2
S16 Spherical surface All-round 0.0500
S17 Spherical surface All-round
TABLE 17
The distance TTL on the optical axis from the object-side surface S1 of the first lens E1 to the imaging surface S17 is 14.87mm, and the ImgH, which is half the diagonal length of the effective pixel area on the imaging surface S17, is 2.67 mm.
As shown in table 18, it shows the parameters of the zoom lens group in embodiment 5 at the telephoto end, the middle end and the telephoto end, respectively, wherein the total focal length f of the zoom lens group at different zoom factorsWThe unit of the air space D1 on the optical axis of the surface closest to the image side when the zoom lens group is positioned at the telephoto end and the diaphragm, the air space D2 on the optical axis of the surface closest to the image side when the zoom lens group is positioned at the middle end and the surface closest to the object side when the zoom lens group is positioned at the telephoto end under different zoom factors, and the unit of the air space D3 on the optical axis of the surface closest to the image side and the optical filter in the third lens group under different zoom factors are millimeters (mm), and the maximum field angle | FOV of the zoom lens group under different zoom factors is | FOV |WThe unit of | is degree.
Figure BDA0003070316610000211
Watch 18
The relationship of parameters between the respective lenses in the zoom lens group in this embodiment 5 is shown in the following table 19:
Figure BDA0003070316610000212
watch 19
In example 5, the object-side surface and the image-side surface of any one of the first lens element E1 through the seventh lens element E7 are aspheric, and table 20 shows the high-order term coefficients a4, A6, A8, a10, a12, a14, a16, a18, and a20 that can be used for the respective aspheric mirror surfaces S1 through S14 in example 5.
Figure BDA0003070316610000213
Figure BDA0003070316610000221
Watch 20
FIG. 13a is a view showing an on-axis chromatic difference curve at the telephoto end of the zoom lens group in FIG. 13, which represents a convergent focus deviation of light rays of different wavelengths after passing through the zoom lens group; FIG. 13b shows astigmatic curves of the zoom lens group of FIG. 13 at the telephoto end, which represent meridional field curvature and sagittal field curvature; FIG. 13c is a distortion curve at the telephoto end of the zoom lens group in FIG. 13, which shows values of distortion magnitudes for different angles of view; fig. 13d shows a chromatic aberration of magnification curve at the telephoto end of the zoom lens group in fig. 13, which represents deviations of different image heights on the imaging surface after light passes through the lens.
FIG. 14a is a diagram showing an on-axis aberration curve at the intermediate end of the zoom lens group of FIG. 14, which represents a convergent focus deviation of light rays of different wavelengths after passing through the zoom lens group; FIG. 14b shows an astigmatism curve at the middle end of the zoom lens group of FIG. 14, which represents meridional field curvature and sagittal field curvature; fig. 14c shows a distortion curve at the middle end of the zoom lens group in fig. 14, which represents values of distortion magnitude corresponding to different angles of view; fig. 14d shows a chromatic aberration of magnification curve at the middle end of the zoom lens group in fig. 14, which represents the deviation of different image heights on the image plane after light passes through the lens.
FIG. 15a is a diagram showing an on-axis chromatic aberration curve at the telephoto end of the zoom lens group in FIG. 15, which represents a convergent focus deviation of light rays of different wavelengths after passing through the zoom lens group; FIG. 15b shows an astigmatism curve at the telephoto end of the zoom lens group in FIG. 15, which represents meridional field curvature and sagittal field curvature; fig. 15c shows a distortion curve of the zoom lens group in fig. 15 at the telephoto end, which represents values of distortion magnitudes corresponding to different angles of view; fig. 15d shows a chromatic aberration of magnification curve at the telephoto end of the zoom lens group in fig. 15, which represents the deviation of different image heights on the image plane after light passes through the lens.
As can be seen from fig. 13a to 15d, the zoom lens group according to embodiment 5 can achieve good imaging quality.
The zoom lens system provided by the invention comprises the following components in sequence from an object side to an image side along an optical axis: the lens comprises a first lens group comprising a first lens, a second lens group comprising a diaphragm, a second lens with positive focal power, a third lens, a second lens group comprising a fourth lens with negative focal power and a fifth lens, and a third lens group comprising a sixth lens with positive focal power and a seventh lens; the lenses are not adhered to each other, and the first lens group, the second lens group and the third lens group move on the optical axis respectively to realize continuous zooming of the zoom lens group. By distributing different lenses in different lens groups and reasonably distributing the focal power and the surface type of each lens, the lenses can show better imaging effect under different focal lengths, so that the zoom lens group has smaller aberration on an optical axis, and simultaneously can balance high-order aberration of the system, thereby being beneficial to matching the chief ray of the system comprising the zoom lens group with an image plane, and further achieving good imaging quality.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, improvements, equivalents and the like that fall within the spirit and principle of the present invention are intended to be included within the scope of the present invention.

Claims (10)

1. A zoom lens assembly, comprising, in order from an object side to an image side along an optical axis of the zoom lens assembly:
a first lens group including a first lens;
the second lens group comprises a diaphragm, a second lens, a third lens, a fourth lens and a fifth lens, wherein the second lens has positive focal power, and the fourth lens has negative focal power;
the third lens group comprises a sixth lens and a seventh lens, wherein the sixth lens has positive focal power;
wherein the first lens, the second lens, the third lens, the fourth lens, the fifth lens, the sixth lens and the seventh lens are not adhered to each other;
the first lens group is fixed relative to an imaging surface, and the second lens group and the third lens group can move along the optical axis to realize continuous zooming of the zoom lens group.
2. The zoom lens group of claim 1, wherein the effective focal length f1 of the first lens and the effective focal length f3 of the third lens satisfy: -4.5< f1/f3< -3.0.
3. The zoom lens group of claim 1, wherein the maximum field angle | FOV at different zoom powers of the zoom lens groupWI satisfies: 25 degree<|FOVW|<52°。
4. The zoom lens group of claim 1, wherein 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 satisfy: 0.5< R4/R3< 1.5.
5. The zoom lens group of claim 1, wherein the effective focal length f3 of the third lens and the radius of curvature R5 of the object side surface of the third lens satisfy: 1.0< f3/R5< 2.0.
6. The zoom lens group of claim 1, wherein the total focal length f of the zoom lens group at different zoom factorsWAnd the diameter EPD of the entrance pupil of the zoom lens group under different zoom factorsWSatisfies the following conditions: 2.0<fW/EPDW<4.0。
7. The zoom lens group of claim 1, wherein the radius of curvature R7 of the object-side surface of the fourth lens, the radius of curvature R8 of the image-side surface of the fourth lens, and the effective focal length f4 of the fourth lens satisfy: -4.5< | R7+ R8|/f4< -0.5.
8. The zoom lens group of claim 1, wherein the effective focal length f5 of the fifth lens and the radius of curvature R10 of the image side surface of the fifth lens satisfy: -2.0< f5/R10< -1.0.
9. The zoom lens group of claim 1, wherein the radius of curvature R11 of the object-side surface of the sixth lens and the radius of curvature R13 of the object-side surface of the seventh lens satisfy: 2.0< R11/R13< 3.0.
10. The zoom lens group of claim 1, wherein the effective focal length f6 of the sixth lens, the effective focal length f7 of the seventh lens and the radius of curvature R12 of the image side surface of the sixth lens satisfy: -2.0< (f6+ f7)/R12< -1.0.
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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2023174212A1 (en) * 2022-03-15 2023-09-21 华为技术有限公司 Long-focus lens, camera module and electronic device

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2023174212A1 (en) * 2022-03-15 2023-09-21 华为技术有限公司 Long-focus lens, camera module and electronic device

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