CN114967083B - Zoom lens - Google Patents

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Publication number
CN114967083B
CN114967083B CN202210583397.6A CN202210583397A CN114967083B CN 114967083 B CN114967083 B CN 114967083B CN 202210583397 A CN202210583397 A CN 202210583397A CN 114967083 B CN114967083 B CN 114967083B
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Prior art keywords
lens
lens group
zoom
zoom lens
focal length
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CN114967083A (en
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蓝岚
梁伟朝
应永茂
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Sunny Optics Zhongshan Co Ltd
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Sunny Optics Zhongshan Co Ltd
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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
    • G02B15/144—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 four groups only
    • G02B15/1445—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 four groups only the first group being negative
    • G02B15/144511—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 four groups only the first group being negative arranged -+-+

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

Abstract

The present invention relates to a zoom lens, including, in order from an object side to an image side along an optical axis: a first lens group (G1) with negative focal power, a second lens group (G2) with positive focal power, a diaphragm (S), a third lens group (G3) with negative focal power and a fourth lens group (G4) with positive focal power, wherein the first lens group (G1) is fixed relative to an image plane (IMA), the second lens group (G2) moves between the image plane (IMA) and an object plane along an optical axis, the third lens group (G3) is fixed relative to the image plane (IMA), and the fourth lens group (G4) moves along the optical axis in a nonlinear manner according to the movement of the second lens group (G2); alternatively, the third lens group (G3) moves along the optical axis in a nonlinear manner in accordance with the movement of the second lens group (G2), and the fourth lens group (G4) is fixed in position with respect to the image plane (IMA). The lens realizes ultra-large field angle at the wide angle end, ultra-miniaturization and low cost, and has high resolution in the zooming process.

Description

Zoom lens
Technical Field
The present disclosure relates to optical systems, and particularly to a zoom lens.
Background
Today, the application of electronic technology is more and more widespread, and the optical lens is used as the 'eye' of the machine, so that a plurality of new application fields are continuously developed. Besides three major business markets of security protection, mobile phones and vehicles, as a main acquisition component of optical signals, an optical lens has become an important component of emerging terminal electronic products such as AI identification, projection video, intelligent home, virtual reality, laser projection and the like. The optical lens mounted on the electronic device is slightly different from the electronic device in terms of form and technical standard.
The security monitoring system is a serious problem of the Internet of things in intelligent home application, and through effectively connecting a monitoring camera, a window sensor, an intelligent doorbell (a built-in camera), an infrared monitor and the like together, a user can check indoor real-time conditions at any time and any place through a mobile phone and an Ipad, so that the house security is ensured.
Most smart home lenses in the market are fixed focus lenses or binocular lenses, and in the digital zooming process, the definition is reduced, and continuous zooming cannot be realized. Moreover, the traditional optical zoom lens has larger clear aperture and volume, and cannot meet the requirements of miniaturization and low cost of smart home.
Therefore, it is necessary to design a miniaturized zoom lens which is applied to intelligent home equipment, can replace a fixed focus lens in multiple occasions, has small size, low cost and high performance, does not have virtual focus at the environment temperature of low temperature of-40 ℃ to high temperature of 80 ℃ and has night vision function at night in a dim indoor environment.
Disclosure of Invention
In order to solve the above problems in the prior art, an object of the present invention is to provide a zoom lens.
In order to achieve the above object, the present invention provides a zoom lens, comprising, in order from an object side to an image side along an optical axis: a first lens group with negative focal power, a second lens group with positive focal power, a diaphragm, a third lens group with negative focal power and a fourth lens group with positive focal power, wherein the first lens group is fixed relative to an image plane and is used for realizing that the second lens group with variable times from a wide angle end to a telescopic end moves between the image plane and the object plane along an optical axis,
the third lens group is fixed relative to the image plane, and the fourth lens group for focusing does nonlinear movement along the optical axis corresponding to the movement of the second lens group;
or, the third lens group for focusing makes a nonlinear movement along an optical axis corresponding to the movement of the second lens group, and the fourth lens group is fixed in position relative to the image plane.
According to an aspect of the present invention, in a direction from an object side to an image side along an optical axis, the first lens group includes, in order: a first lens with negative focal power, a second lens with negative focal power and a third lens with positive focal power.
According to one aspect of the invention, the optical axis is oriented in a direction from the object side to the image side,
the first lens is a convex-concave lens;
the second lens is a paraxial region biconcave lens or a paraxial region convex-concave lens;
the third lens is a paraxial region biconvex lens, a paraxial region convex-concave lens or a paraxial region convex-flat lens.
According to one aspect of the invention, the second lens and the third lens are aspherical lenses.
According to one aspect of the inventionAn effective light-transmitting aperture phi of the image side surface of the first lens 2 And a radius of curvature R of an image side surface of the first lens 2 The following conditional expression is satisfied: phi is more than or equal to 0.8 percent 2 /(2R 2 )|≤1.0。
According to one aspect of the invention, the refractive index Nd of the first lens 1 And Abbe number Vd 1 The following conditional expressions are satisfied, respectively:
1.5≤Nd 1 ≤1.8；
51.7≤Vd 1 ≤69.5。
according to one aspect of the invention, the focal length f of the second lens 2 And a focal length f of the third lens 3 The following conditional expression is satisfied: f is more than or equal to 0.5% 2 /f 3 |≤0.8。
According to an aspect of the present invention, in a direction from an object side to an image side along an optical axis, the second lens group includes, in order: a fourth lens with positive focal power, a fifth lens with negative focal power, a sixth lens with negative focal power and a seventh lens with positive focal power.
According to one aspect of the invention, the optical axis is oriented in a direction from the object side to the image side,
the fourth lens is a paraxial region convex-concave lens or a paraxial region biconvex lens;
the fifth lens is a paraxial region biconcave lens, a paraxial region convex-concave lens or a paraxial region plano-concave lens;
the sixth lens is a convex-concave lens;
the seventh lens is a biconvex lens.
According to one aspect of the invention, the fourth lens and the fifth lens are aspherical lenses.
According to one aspect of the present invention, the sixth lens and the seventh lens are cemented to form a cemented doublet.
According to one aspect of the invention, the focal length f of the fourth lens 4 And a focal length f of the fifth lens 5 The following conditional expression is satisfied: f is more than or equal to 0.3 4 /f 5 |≤0.9。
According to the inventionIn one aspect of (2), the refractive index Nd of the sixth lens 6 And Abbe number Vd 6 The following conditional expressions are satisfied, respectively:
1.9≤Nd 6 ≤2.1；
15.6≤Vd 6 ≤21.8；
refractive index Nd of the seventh lens 7 And Abbe number Vd 7 The following conditional expressions are satisfied, respectively:
1.5≤Nd 7 ≤1.7；
58.9≤Vd 7 ≤66.8。
according to an aspect of the present invention, the third lens group includes: and an eighth lens having negative optical power.
According to one aspect of the present invention, the eighth lens is a paraxial region convex-concave lens in a direction from an object side to an image side along an optical axis.
According to one aspect of the invention, the eighth lens is an aspherical lens.
According to one aspect of the present invention, a focal length F of the third lens group Ⅲ And an effective clear aperture phi of the eighth lens 8 The following conditional expression is satisfied: f is more than or equal to 1.5% Ⅲ /Ф 8 |≤5.2。
According to an aspect of the present invention, the fourth lens group includes: and a ninth lens with positive focal power.
According to one aspect of the invention, the ninth lens is a paraxial region biconvex lens.
According to one aspect of the invention, the ninth lens is an aspherical lens.
According to one aspect of the invention, the stop is a fixed aperture stop, which follows the second lens group along the optical axis during zooming.
According to one aspect of the invention, the aspheric lens is a plastic lens.
According to one aspect of the invention, the focal length F of the first lens group Ⅰ And a focal length Fw of the zoom lens at the wide-angle end satisfies the following conditional expression: f is more than or equal to 1.3 Ⅰ /Fw|≤1.7。
According to an aspect of the present invention, a travel distance Δd of the second lens group from the wide-angle end to the telephoto end of the zoom lens and an optical system total length L of the zoom lens satisfy the following conditional expressions: the delta D/L is more than or equal to 0.1 and less than or equal to 0.2.
According to one aspect of the invention, the focal length F of the second lens group Ⅱ And a focal length Fw of the zoom lens at a wide-angle end and a focal length Ft of the zoom lens at a telephoto end satisfy the following conditional expressions, respectively:
1.7≤|F Ⅱ /Fw|≤2.1；
0.9≤|F Ⅱ /Ft|≤1.1。
according to one aspect of the invention, the focal length F of the fourth lens group Ⅳ And a focal length Fw of the zoom lens at a wide-angle end and a focal length Ft of the zoom lens at a telephoto end satisfy the following conditional expressions, respectively:
2.3≤|F Ⅳ /Fw|≤4.7；
1.2≤|F Ⅳ /Ft|≤2.5。
according to the scheme of the invention, the zoom lens breaks through the traditional four-group and two-group zooming optical architecture, adopts the first lens group with negative focal power and the second lens group with positive focal power, reasonably sets parameters such as lens shape, focal power, light-transmitting caliber, curvature radius and the like in each lens group, and realizes the ultra-large field angle at the wide angle end. The second lens group moves along the optical axis direction from the image surface to the object surface, overcomes the defects that the head volume of the traditional zoom architecture is large and the total length of an optical system cannot be shortened, and realizes the 2-time zoom range from the wide-angle end to the telescopic end of the lens under the extremely short stroke. Meanwhile, the third lens group with negative focal power and the fourth lens group with positive focal power are adopted, so that various aberrations of the lens are effectively corrected, the resolution of the lens is improved, the lens is miniaturized, and the lens has high-definition resolution in the zooming process.
According to one scheme of the invention, through the selection of specific materials of the lens and the reasonable focal power collocation, the optical system of the zoom lens can still ensure good resolution at the environment temperature of low temperature of-40 ℃ to high temperature of 80 ℃ and does not have virtual focus in the environment of high temperature and low temperature. By reasonably matching the glass lens and the plastic lens, under the condition of using fewer glass lenses, various performances of the system are still ensured, meanwhile, the production cost is greatly reduced, and the acquisition of high-definition images can be realized through the infrared confocal scheme design even under the weak illumination condition.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings that are required to be used in the embodiments will be briefly described below. It is apparent that the drawings in the following description are only some embodiments of the present invention, and that other drawings may be obtained from these drawings without inventive effort for a person of ordinary skill in the art.
Fig. 1-1 schematically illustrates a configuration diagram of a wide-angle end of a zoom lens according to a first embodiment of the present invention;
fig. 1-2 schematically show a structure of a zoom lens according to a first embodiment of the present invention;
fig. 1 to 3 schematically show a visible RAY FAN diagram at the wide-angle end of a zoom lens according to a first embodiment of the present invention;
fig. 1 to 4 schematically show infrared RAY FAN diagrams at the wide-angle end of a zoom lens according to a first embodiment of the present invention;
fig. 1 to 5 schematically show a visible RAY FAN diagram of a telephoto end of a zoom lens according to a first embodiment of the present invention;
fig. 1 to 6 schematically show infrared RAY FAN diagrams at the telephoto end of a zoom lens according to a first embodiment of the present invention;
fig. 2-1 schematically illustrates a structure of a zoom lens at a wide-angle end according to a second embodiment of the present invention;
fig. 2-2 schematically illustrates a structure of a zoom lens according to a second embodiment of the present invention;
fig. 2 to 3 schematically show a visible RAY FAN diagram at the wide-angle end of a zoom lens according to a second embodiment of the present invention;
fig. 2 to 4 schematically show infrared RAY FAN diagrams at the wide-angle end of a zoom lens according to a second embodiment of the present invention;
fig. 2 to 5 schematically show a visible RAY FAN diagram of a telephoto end of a zoom lens according to a second embodiment of the present invention;
fig. 2 to 6 schematically show infrared RAY FAN diagrams at the telephoto end of the zoom lens according to the second embodiment of the present invention;
fig. 3-1 schematically shows a configuration diagram of a wide-angle end of a zoom lens according to a third embodiment of the present invention;
fig. 3-2 schematically illustrates a structure of a telephoto end of a zoom lens according to a third embodiment of the present invention;
fig. 3 to 3 schematically show a visible RAY FAN diagram at the wide-angle end of a zoom lens according to a third embodiment of the present invention;
fig. 3 to 4 schematically show infrared RAY FAN diagrams at the wide-angle end of a zoom lens according to a third embodiment of the present invention;
fig. 3 to 5 schematically show a visible RAY FAN diagram of a telephoto end of a zoom lens according to a third embodiment of the present invention;
fig. 3 to 6 schematically show infrared RAY FAN diagrams at the telephoto end of the zoom lens according to the third embodiment of the present invention;
fig. 4-1 schematically shows a configuration diagram of a wide-angle end of a zoom lens according to a fourth embodiment of the present invention;
fig. 4-2 schematically illustrates a structure of a zoom lens according to a fourth embodiment of the present invention;
fig. 4-3 schematically show a view of a visible RAY FAN at the wide-angle end of a zoom lens according to a fourth embodiment of the present invention;
fig. 4 to 4 schematically show infrared RAY FAN diagrams at the wide-angle end of a zoom lens according to a fourth embodiment of the present invention;
fig. 4 to 5 schematically show a visible RAY FAN diagram of a telephoto end of a zoom lens according to a fourth embodiment of the present invention;
fig. 4 to 6 schematically show infrared RAY FAN diagrams at the telephoto end of the zoom lens according to the fourth embodiment of the present invention.
Detailed Description
The description of the embodiments of this specification should be taken in conjunction with the accompanying drawings, which are a complete description of the embodiments. In the drawings, the shape or thickness of the embodiments may be enlarged and indicated simply or conveniently. Furthermore, portions of the structures in the drawings will be described in terms of separate descriptions, and it should be noted that elements not shown or described in the drawings are in a form known to those of ordinary skill in the art.
Any references to directions and orientations in the description of the embodiments herein are for convenience only and should not be construed as limiting the scope of the invention in any way. The following description of the preferred embodiments will refer to combinations of features which may be present alone or in combination, and the invention is not particularly limited to the preferred embodiments. The scope of the invention is defined by the claims.
As shown in fig. 1-1 and fig. 1-2, a zoom lens according to an embodiment of the present invention sequentially includes, along an optical axis from an object side to an image side: the lens system includes a first lens group G1 having negative power, a second lens group G2 having positive power, a stop S, a third lens group G3 having negative power, a fourth lens group G4 having positive power, and a cover glass CG. Wherein, the position of the first lens group G1 relative to the image plane IMA is fixed. The second lens group G2 is moved between the image plane IMA and the object plane in the optical axis direction for realizing magnification variation from the wide-angle end to the telephoto end. The position of the third lens group G3 with respect to the image plane IMA is fixed. The fourth lens group G4 performs nonlinear movement along the optical axis corresponding to the movement of the second lens group G2, and is used for focusing (or focusing), so as to realize image plane IMA correction and ensure the stability of the image plane IMA of the optical system in the focal length change process. Alternatively, as shown in fig. 3-1 and 3-2, the fourth lens group G4 is fixed in position with respect to the image plane IMA. The third lens group G3 performs nonlinear movement along the optical axis corresponding to the movement of the second lens group G2, and is used for focusing and realizing image plane IMA correction, so as to ensure the stability of the image plane IMA in the focal length change process. By reasonably configuring the action modes among the lens groups and the focal power of the corresponding lens groups, various aberrations of the system are well corrected, so that the resolution of the lens is improved, and high-definition resolution is realized.
In the embodiment of the present invention, along the direction from the object side to the image side of the optical axis, the first lens group G1 sequentially includes: a first lens L1 with negative focal power, a second lens L2 with negative focal power and a third lens with positive focal powerMirror L3. For the lens shape, the first lens L1 is a convex-concave lens, the second lens L2 is a paraxial region biconcave lens or a paraxial region convex-concave lens, and the third lens L3 is a paraxial region biconvex lens, a paraxial region convex-concave lens, or a paraxial region convex-flat lens in a direction from the object side to the image side along the optical axis. Wherein the second lens L2 and the third lens L3 are aspherical lenses. Effective light-transmitting aperture phi of image side surface of first lens L1 2 And a radius of curvature R of the image side surface of the first lens L1 2 The following conditional expression is satisfied: phi is more than or equal to 0.8 percent 2 /(2R 2 ) The I is less than or equal to 1.0. The first lens group G1 includes three lenses, and is configured to reasonably arrange the focal power, the shape of the object side surface and the image side surface, the surface shape, and the like of each lens, and to design the aperture of the image side surface and the curvature radius of the image side surface of the first lens L1, so that the aperture of the zoom lens optical system can be effectively reduced, and the angle of field at the wide-angle end can be increased.
In the embodiment of the invention, the refractive index Nd of the first lens L1 1 And Abbe number Vd 1 The following conditional expressions are satisfied, respectively: nd is more than or equal to 1.5 1 Less than or equal to 1.8; vd of 51.7 or less 1 And is less than or equal to 69.5. The first lens L1 is made of the materials, so that miniaturization of the head shape of the zoom lens and correction of chromatic aberration of an optical system are facilitated.
In the embodiment of the invention, the focal length f of the second lens L2 2 And focal length f of third lens L3 3 The following conditional expression is satisfied: f is more than or equal to 0.5% 2 /f 3 The I is less than or equal to 0.8. Preferably, the second lens L2 and the third lens L3 of the aspherical lens are plastic lenses. The reasonable collocation of the positive and negative focal power of the plastic lens is beneficial to the lens not to be virtually focused at different environmental temperatures.
In the embodiment of the present invention, along the direction from the object side to the image side of the optical axis, the second lens group G2 sequentially includes: a fourth lens L4 with positive focal power, a fifth lens L5 with negative focal power, a sixth lens L6 with negative focal power and a seventh lens L7 with positive focal power. With respect to the lens shape, in the direction from the object side to the image side of the optical axis, the fourth lens L4 is a paraxial region convex-concave lens or a paraxial region biconvex lens, the fifth lens L5 is a paraxial region biconcave lens, a paraxial region convex-concave lens or a paraxial region plano-concave lens,the sixth lens L6 is a convex-concave lens, and the seventh lens L7 is a biconvex lens. The fourth lens L4 and the fifth lens L5 are aspherical lenses. Preferably, the aspherical lens is a plastic lens. Focal length f of fourth lens L4 4 And focal length f of fifth lens L5 5 The following conditional expression is satisfied: f is more than or equal to 0.3 4 /f 5 The I is less than or equal to 0.9. The second lens group G2 uses two plastic aspheric lenses, which is favorable for correcting spherical aberration generated in the zooming process of the lens. Meanwhile, through reasonable collocation of positive and negative focal power of the fourth lens L4 to the seventh lens L7, the lens is beneficial to not being in virtual focus at different environmental temperatures.
In the embodiment of the invention, the sixth lens L6 and the seventh lens L7 are cemented together to form a cemented doublet. Refractive index Nd of sixth lens L6 6 And Abbe number Vd 6 The following conditional expressions are satisfied, respectively: nd is more than or equal to 1.9 6 Less than or equal to 2.1; vd of 15.6 or less 6 And is less than or equal to 21.8. Refractive index Nd of seventh lens L7 7 And Abbe number Vd 7 The following conditional expressions are satisfied, respectively: nd is more than or equal to 1.5 7 Less than or equal to 1.7; vd of 58.9 or less 7 And is less than or equal to 66.8. The second lens group G2 comprises a double-cemented glass lens composed of a sixth lens L6 and a seventh lens L7 which are made of the materials, can effectively correct chromatic aberration of the system, has the characteristic of high contrast of image under visible light, and can clearly image through the light supplement of an infrared lamp when light is insufficient at night.
In the embodiment of the present invention, the third lens group G3 includes: and an eighth lens L8 with negative focal power. The eighth lens L8 is a paraxial region convex-concave lens in a direction from the object side to the image side along the optical axis. The eighth lens L8 is an aspherical lens. Preferably, the aspherical lens is a plastic lens.
In the embodiment of the present invention, the fourth lens group G4 includes: and a ninth lens L9 with positive focal power. The ninth lens L9 is a paraxial region biconvex lens. The ninth lens L9 is an aspherical lens. Preferably, the aspherical lens is a plastic lens. By reasonably configuring the aspheric surface and the spherical lens, various aberrations of the system are well corrected, so that the resolution of the lens is improved, and high-definition resolution is realized. Meanwhile, through skillfully matching with the glass and plastic lens, the rear Jiao Piaoyi of the lens at high and low temperatures is perfectly compensated, and the clear imaging of the lens at the limiting temperature is ensured.
In the embodiment of the invention, the diaphragm S is a fixed aperture diaphragm, and in the zooming process, the diaphragm S moves along the optical axis along with the second lens group G2. Preferably, the aperture stop S is disposed on the image side of the seventh lens L7, but it will be understood by those skilled in the art that the same performance characteristics can be achieved even if the aperture stop S is not disposed on the image side of the seventh lens L7, and this is to reduce one structural member, which is beneficial to reducing the cost of the lens and achieving miniaturization.
In the embodiment of the invention, the focal length F of the first lens group G1 Ⅰ And a focal length Fw of the zoom lens at the wide-angle end satisfies the following conditional expression: f is more than or equal to 1.3 Ⅰ Fw is less than or equal to 1.7. This way of distributing the optical power of the first lens group G1 is advantageous in increasing the angle of view of the lens at the wide-angle end.
In the embodiment of the present invention, the travel distance Δd of the second lens group G2 from the wide-angle end to the telephoto end of the zoom lens and the total optical system length L of the zoom lens satisfy the following conditional expressions: the delta D/L is more than or equal to 0.1 and less than or equal to 0.2. By the arrangement, in the process of zooming the lens from the wide-angle end to the telescopic end, the 2-time zooming range from the wide-angle end to the telescopic end can be realized under the extremely short stroke, and the total length of an optical system of the lens is facilitated to be compressed.
In the embodiment of the invention, the focal length F of the second lens group G2 Ⅱ And a focal length Fw of the zoom lens at the wide-angle end and a focal length Ft of the zoom lens at the telephoto end satisfy the following conditional expressions, respectively: f is more than or equal to 1.7% Ⅱ Fw is less than or equal to 2.1; and 0.9 is less than or equal to |F Ⅱ Ft is less than or equal to 1.1. The optical power of the second lens group G2 can be efficiently transmitted by the above-described distribution method.
In the embodiment of the present invention, the focal length F of the third lens group G3 Ⅲ And an effective clear aperture phi of an eighth lens L8 8 The following conditional expression is satisfied: f is more than or equal to 1.5% Ⅲ /Ф 8 And the field curvature aberration of the optical system is favorably corrected by the level of being less than or equal to 5.2.
In the embodiment of the invention, the focal length F of the fourth lens group G4 Ⅳ And a focal length Fw of the zoom lens at the wide-angle end, the zoom lensThe focal lengths Ft at the telephoto end satisfy the following conditional expressions, respectively: 2.3 is less than or equal to |F Ⅳ Fw is less than or equal to 4.7; and F is more than or equal to 1.2% Ⅳ Ft is less than or equal to 2.5. The reasonable focal power collocation of the fourth lens group G4 is beneficial to various aberrations brought in the zooming process of the zooming optical system so as to ensure stable imaging quality.
In summary, the zoom lens of the embodiment of the invention can effectively correct various aberrations of system chromatic aberration, spherical aberration and field curvature aberration generated in the zooming process, realize ultra-large field angle at the wide angle end, ultra-miniaturization and low cost, and has high resolution in the zooming process and stable imaging quality. Meanwhile, the lens can still ensure good resolution at the environment temperature of between-40 ℃ and 80 ℃ and can clearly image under the condition of weak illumination without deficiency focus at the environment of high temperature and low temperature. The second lens group G2 moves from the image plane to the object plane along the optical axis direction, and achieves a 2-fold zoom range of the lens from the wide-angle end to the telephoto end in an extremely short stroke.
The zoom lens of the present invention will be specifically described below with reference to the accompanying drawings and tables in four embodiments. In the following embodiments, the present invention refers to the diaphragm S as one side and the image plane IMA as one side.
The parameters of the respective examples specifically satisfying the above conditional expression are shown in the following table 1:
conditional expression Example 1 Example two Example III Example IV
1.3≤|F Ⅰ /Fw|≤1.7 1.43 1.45 1.41 1.64
0.1≤|ΔD/L|≤0.2 0.16 0.16 0.16 0.17
1.7≤|F Ⅱ /Fw|≤2.1 1.87 1.88 1.84 2.05
0.9≤|F Ⅱ /Ft|≤1.1 0.98 0.98 0.95 1.07
1.5≤|F Ⅲ /Ф 8 |≤5.2 2.68 3.71 2.14 4.52
2.3≤|F Ⅳ /Fw|≤4.7 3.13 4.29 2.77 4.20
1.2≤|F Ⅳ /Ft|≤2.5 1.64 2.23 1.43 2.20
0.8≤|Ф 2 /(2R 2 )|≤1.0 0.90 0.94 0.87 0.92
1.5≤Nd 1 ≤1.8 1.60 1.65 1.73 1.62
51.7≤Vd 1 ≤69.5 66.46 58.41 54.67 63.40
0.5≤|f 2 /f 3 |≤0.8 0.59 0.66 0.67 0.74
0.3≤|f 4 /f 5 |≤0.9 0.44 0.45 0.47 0.74
1.9≤Nd 6 ≤2.1 1.92 1.95 2.00 1.92
15.6≤Vd 6 ≤21.8 20.88 17.95 19.31 20.88
1.5≤Nd 7 ≤1.7 1.60 1.62 1.64 1.64
58.9≤Vd 7 ≤66.8 65.46 63.4 60.21 60.21
TABLE 1
In an embodiment of the present invention, the plastic aspherical lens of the zoom lens satisfies the following formula:
in the above formula, z is in the direction of the optical axis, and the height perpendicular to the optical axis is yThe axial distance from the curved surface to the vertex at the position; c represents the curvature at the apex of the aspherical curved surface; k is a conic coefficient; a is that 4 、A 6 、A 8 、A 10 、A 12 、A 14 、A 16 The fourth order, sixth order, eighth order, tenth order, fourteenth order, sixteen order, respectively, are aspherical coefficients.
Example 1
Referring to fig. 1-1 and 1-2, the parameters of the zoom lens in the present embodiment are as follows:
focal length: 3.36-6.39mm; FNo:1.68-2.44.
In this embodiment, the first lens group G1 and the third lens group G3 are fixed relative to the image plane IMA, the second lens group G2 moves from the image plane IMA side to the object plane side along the optical axis, so as to realize zooming from the wide-angle end to the telephoto end, and meanwhile, the fourth lens group G4 does corresponding nonlinear movement along the optical axis, so as to realize correction and focusing of the image plane IMA, and ensure stability of the image plane IMA of the system in the focal length change process. The lens comprises three glass lenses, six plastic aspheric lenses, and a fixed diaphragm S is overlapped with the image side surface of a seventh lens L7.
Table 2 lists relevant parameters of each lens in the zoom lens of the present embodiment, including: surface type, radius of curvature, thickness, refractive index of the material, and abbe number.
TABLE 2
Table 3 lists the aspherical coefficients of the respective aspherical lenses of the zoom lens of the present embodiment, including: the quadric constant K (also called the Conic value) of the surface, the fourth order aspheric coefficient A 4 Aspheric coefficient A of six orders 6 Eighth order aspheric coefficient A 8 Tenth order aspherical coefficient A 10 Twelve-order aspheric coefficient A 12 And ten timesFourth order aspheric coefficient A 14 。
TABLE 3 Table 3
Table 4 lists the interval D1 between the first lens group G1 and the second lens group G2, the interval D2 between the second lens group G2 and the third lens group G3, the interval D3 between the third lens group G3 and the fourth lens group G4, and the interval D4 between the fourth lens group G4 and the cover glass CG when the zoom lens of the present embodiment is changed from the wide angle end to the telephoto end. Here, the distance D1 refers to the center distance between the image side surface of the last lens element in the first lens group G1 and the object side surface of the first lens element in the second lens group G2, the distance D2 refers to the center distance between the image side surface of the last lens element in the second lens group G2 and the object side surface of the first lens element in the third lens group G3, the distance D3 refers to the center distance between the image side surface of the eighth lens element L8 and the object side surface of the ninth lens element L9, and the distance D4 refers to the center distance between the image side surface of the ninth lens element L9 and the object side surface of the cover glass CG.
Surface serial number Thickness of (L) Wide angle end Telescope end
6 D1 4.46 0.36
13 D2 0.84 4.94
15 D3 1.56 1.28
17 D4 4.16 4.44
TABLE 4 Table 4
The zoom lens of the present embodiment, in combination with fig. 1-1 to 1-6 and the above tables 1 to 4, can effectively correct various aberrations such as systematic chromatic aberration, spherical aberration and field curvature aberration generated during zooming, realize ultra-large field angle at the wide angle end, ultra-miniaturization, low cost, and has high resolution and stable imaging quality during zooming. Meanwhile, the lens can still ensure good resolution at the environment temperature of between-40 ℃ and 80 ℃ and can clearly image under the condition of weak illumination without deficiency focus at the environment of high temperature and low temperature. The second lens group G2 moves from the image plane to the object plane along the optical axis direction, and achieves a 2-fold zoom range of the lens from the wide-angle end to the telephoto end in an extremely short stroke.
Example two
Referring to fig. 2-1 and 2-2, the parameters of the zoom lens of the present embodiment are as follows:
focal length: 3.33-6.4mm; FNo:1.65-2.54.
In this embodiment, the first lens group G1 and the third lens group G3 are fixed relative to the image plane IMA, the second lens group G2 moves from the image plane IMA side to the object plane side along the optical axis, so as to realize zooming from the wide-angle end to the telephoto end, and meanwhile, the fourth lens group G4 does corresponding nonlinear movement along the optical axis, so as to realize correction and focusing of the image plane IMA, and ensure stability of the image plane IMA of the system in the focal length change process. The lens comprises three glass lenses, six plastic aspheric lenses, and a fixed diaphragm S is overlapped with the image side surface of a seventh lens L7.
Table 5 lists relevant parameters of each lens in the zoom lens of the present embodiment, including: surface type, radius of curvature, thickness, refractive index of the material, and abbe number.
TABLE 5
Table 6 lists the aspherical coefficients of the respective aspherical lenses of the zoom lens of the present embodiment, including: the quadric constant K (also called the Conic value) of the surface, the fourth order aspheric coefficient A 4 Aspheric coefficient A of six orders 6 Eighth order aspheric coefficient A 8 Tenth order aspherical coefficient A 10 Twelve-order aspheric coefficient A 12 And fourteen-order aspheric coefficient a 14 。
Surface serial number Conic A 4 A 6 A 8 A 10 A 12 A 14
3 -33.17 -1.01E-2 5.57E-4 -5.75E-8 -2.72E-6 1.20E-7 -4.97E-10
4 -0.69 -1.38E-2 9.31E-4 -6.26E-5 1.93E-6 -6.32E-10 -3.60E-10
5 0.37 5.03E-4 -8.06E-5 6.18E-6 1.77E-7 -1.39E-8 4.04E-12
6 -90.00 -8.23E-4 1.72E-4 -1.23E-6 1.29E-7 5.33E-10 -1.02E-6
7 0.60 -5.84E-4 3.50E-6 1.78E-6 2.36E-8 -2.56E-9 -2.74E-10
8 48.14 2.19E-3 4.56E-5 1.36E-5 -1.97E-7 4.78E-8 -3.99E-9
9 90.00 5.92E-3 -4.24E-4 2.98E-5 -1.41E-6 1.09E-8 -5.47E-10
10 21.01 5.56E-3 -4.00E-4 1.67E-5 -1.11E-6 5.28E-9 -5.98E-10
14 -0.23 -9.10E-3 2.87E-4 -1.46E-5 7.81E-7 2.40E-7 -2.65E-8
15 -0.63 -9.93E-3 2.17E-4 1.84E-5 -3.40E-6 4.79E-7 -3.27E-8
16 -47.19 -5.00E-4 -1.11E-4 -1.09E-5 -1.38E-6 4.01E-7 -4.00E-8
17 1.52 -1.13E-3 -1.47E-4 8.82E-6 -2.35E-6 2.22E-7 -1.43E-8
TABLE 6
Table 7 lists the interval D1 between the first lens group G1 and the second lens group G2, the interval D2 between the second lens group G2 and the third lens group G3, the interval D3 between the third lens group G3 and the fourth lens group G4, and the interval D4 between the fourth lens group G4 and the cover glass CG when the zoom lens of the present embodiment is changed from the wide angle end to the telephoto end. Here, the meanings of the intervals D1, D2, D3, and D4 are the same as those of the first embodiment.
Surface serial number Thickness of (L) Wide angle end Telescope end
6 D1 4.43 0.3
13 D2 0.3 4.43
15 D3 1.57 1.67
17 D4 3.99 3.89
TABLE 7
2-1 to 2-6 and the foregoing tables 1 and 5 to 7, the zoom lens of the present embodiment can effectively correct various aberrations including systematic chromatic aberration, spherical aberration and field curvature aberration generated in the zooming process, achieve an ultra-large field angle at the wide angle end, ultra-miniaturization and low cost, and has high resolution and stable imaging quality in the zooming process. Meanwhile, the lens can still ensure good resolution at the environment temperature of between-40 ℃ and 80 ℃ and can clearly image under the condition of weak illumination without deficiency focus at the environment of high temperature and low temperature. The second lens group G2 moves from the image plane to the object plane along the optical axis direction, and achieves a 2-fold zoom range of the lens from the wide-angle end to the telephoto end in an extremely short stroke.
Example III
Referring to fig. 3-1 and 3-2, the parameters of the zoom lens of the present embodiment are as follows:
focal length: 3.30-6.4mm; FNo:1.67-2.49.
In this embodiment, the first lens group G1 and the fourth lens group G4 are fixed with respect to the image plane IMA, the second lens group G2 moves from the image plane IMA side to the object plane side along the optical axis, so as to realize zooming from the wide-angle end to the telephoto end, and meanwhile, the third lens group G3 does corresponding nonlinear movement along the optical axis, so as to realize correction and focusing of the image plane IMA, and ensure stability of the image plane IMA of the system in the focal length change process. The lens comprises three glass lenses, six plastic aspheric lenses, and a fixed diaphragm S is overlapped with the image side surface of a seventh lens L7.
Table 8 lists relevant parameters of each lens in the zoom lens of the present embodiment, including: surface type, radius of curvature, thickness, refractive index of the material, and abbe number.
Surface serial number Surface type Radius of curvature Thickness of (L) Refractive index Abbe number
1 Spherical surface 117.79 0.50 1.73 54.67
2 Spherical surface 4.19 2.99
3 Aspherical surface -35.28 0.60 1.54 55.71
4 Aspherical surface 6.27 0.10
5 Aspherical surface 10.94 1.76 1.66 20.38
6 Aspherical surface -94.83 D1
7 Aspherical surface 5.03 1.92 1.54 55.98
8 Aspherical surface 50.48 0.14
9 Aspherical surface -41.73 0.49 1.64 23.53
10 Aspherical surface 21.42 0.16
11 Spherical surface 7.14 1.20 2.00 19.3
12 Spherical surface 4.92 2.11 1.64 60.21
13(S) Spherical surface -8.32 D2
14 Aspherical surface 6.95 0.59 1.54 55.71
15 Aspherical surface 2.99 D4
16 Aspherical surface 10.36 1.79 1.54 55.98
17 Aspherical surface -8.85 3.56
18 Spherical surface Infinity 0.71 1.52 64.20
19 Spherical surface Infinity 0.27
IMA Spherical surface Infinity -
TABLE 8
Table 9 lists the aspherical coefficients of the respective aspherical lenses of the zoom lens of the present embodiment, including: the quadric constant K (also called the Conic value) of the surface, the fourth order aspheric coefficient A 4 Aspheric coefficient A of six orders 6 Eighth order aspheric coefficient A 8 Tenth order aspherical coefficient A 10 Twelve-order aspheric coefficient A 12 And fourteen-order aspheric coefficient a 14 。
TABLE 9
Table 10 lists the interval D1 between the first lens group G1 and the second lens group G2, the interval D2 between the second lens group G2 and the third lens group G3, and the interval D3 between the third lens group G3 and the fourth lens group G4 when the zoom lens of the present embodiment is changed from the wide angle end to the telephoto end. Here, the meanings of the intervals D1, D2, and D3 are the same as those of the first embodiment.
Surface serial number Thickness of (L) Wide angle end Telescope end
6 D1 4.42 0.30
13 D2 1.35 5.1
16 D3 1.31 1.68
Table 10
The zoom lens of the present embodiment, in combination with fig. 3-1 to 3-6 and the above tables 1, 8 to 10, can effectively correct various aberrations including systematic chromatic aberration, spherical aberration and field curvature aberration generated during zooming, achieve ultra-large field angle at the wide angle end, ultra-miniaturization, low cost, high resolution in zooming, and stable imaging quality. Meanwhile, the lens can still ensure good resolution at the environment temperature of between-40 ℃ and 80 ℃ and can clearly image under the condition of weak illumination without deficiency focus at the environment of high temperature and low temperature. The second lens group G2 moves from the image plane to the object plane along the optical axis direction, and achieves a 2-fold zoom range of the lens from the wide-angle end to the telephoto end in an extremely short stroke.
Example IV
Referring to fig. 4-1 and 4-2, the parameters of the zoom lens of the present embodiment are as follows:
focal length: 3.35-6.4mm; FNo:1.65-2.41.
In this embodiment, the first lens group G1 and the third lens group G3 are fixed relative to the image plane IMA, the second lens group G2 moves from the image plane IMA side to the object plane side along the optical axis, so as to realize zooming from the wide-angle end to the telephoto end, and meanwhile, the fourth lens group G4 does corresponding nonlinear movement along the optical axis, so as to realize correction and focusing of the image plane IMA, and ensure stability of the image plane IMA of the system in the focal length change process. The lens comprises three glass lenses, six plastic aspheric lenses, and a fixed diaphragm S is overlapped with the image side surface of a seventh lens L7.
Table 11 lists relevant parameters of each lens in the zoom lens of the present embodiment, including: surface type, radius of curvature, thickness, refractive index of the material, and abbe number.
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TABLE 11
Table 12 lists the aspherical coefficients of the respective aspherical lenses of the zoom lens of the present embodiment, including: the quadric constant K (also called the Conic value) of the surface, the fourth order aspheric coefficient A 4 Aspheric coefficient A of six orders 6 Eighth order aspheric coefficient A 8 Tenth order aspherical coefficient A 10 Twelve-order aspheric coefficient A 12 And fourteen-order aspheric coefficient a 14 。
Table 12
Table 13 lists a distance D1 between the first lens group G1 and the second lens group G2, a distance D2 between the second lens group G2 and the third lens group G3, a distance D3 between the third lens group G3 and the fourth lens group G4, and a distance D4 between the fourth lens group G4 and the cover glass CG when the zoom lens of the present embodiment is changed from the wide angle end to the telephoto end. Here, the meanings of the intervals D1, D2, D3, and D4 are the same as those of the first embodiment.
Surface serial number Thickness of (L) Wide angle end Telescope end
6 D1 4.82 0.3
13 D2 0.3 4.82
15 D3 0.99 1.24
17 D4 4.44 4.19
TABLE 13
4-1 to 4-6 and the above tables 1, 11 to 13, the zoom lens of the present embodiment can effectively correct various aberrations including systematic chromatic aberration, spherical aberration and field curvature aberration generated in the zooming process, achieve ultra-large field angle at the wide angle end, ultra-miniaturization and low cost, and has high resolution and stable imaging quality in the zooming process. Meanwhile, the lens can still ensure good resolution at the environment temperature of between-40 ℃ and 80 ℃ and can clearly image under the condition of weak illumination without deficiency focus at the environment of high temperature and low temperature. The second lens group G2 moves from the image plane to the object plane along the optical axis direction, and achieves a 2-fold zoom range of the lens from the wide-angle end to the telephoto end in an extremely short stroke.
The foregoing description of the preferred embodiments of the invention is not intended to be limiting, but rather is intended to cover all modifications, equivalents, alternatives, and improvements that fall within the spirit and scope of the invention.

Claims (24)

1. A zoom lens, comprising, in order along an optical axis in a direction from an object side to an image side: a first lens group (G1) with negative focal power, a second lens group (G2) with positive focal power, a diaphragm (S), a third lens group (G3) with negative focal power and a fourth lens group (G4) with positive focal power, wherein the first lens group (G1) is fixed relative to the image plane (IMA), the second lens group (G2) moves between the image plane (IMA) and the object plane along the optical axis,
the third lens group (G3) is fixed relative to the image plane (IMA), and the fourth lens group (G4) does nonlinear movement along an optical axis corresponding to the movement of the second lens group (G2);
or, the third lens group (G3) performs a nonlinear movement along an optical axis corresponding to the movement of the second lens group (G2), and the fourth lens group (G4) is fixed in position with respect to the image plane (IMA);
the first lens group (G1) sequentially includes: a first lens (L1) with negative focal power, a second lens (L2) with negative focal power, and a third lens (L3) with positive focal power;
the second lens group (G2) sequentially includes: a fourth lens (L4) with positive focal power, a fifth lens (L5) with negative focal power, a sixth lens (L6) with negative focal power and a seventh lens (L7) with positive focal power;
the third lens group (G3) includes: an eighth lens (L8) having negative optical power;
the fourth lens group (G4) includes: a ninth lens (L9) having positive optical power;
the sixth lens (L6) and the seventh lens (L7) are glued to form a double-glued lens;
focal length f of the fourth lens (L4) 4 And a focal length f of the fifth lens (L5) 5 The following conditional expression is satisfied: f is more than or equal to 0.3 4 /f 5 |≤0.9。
2. The zoom lens according to claim 1, wherein, in a direction from the object side to the image side along the optical axis,
the first lens (L1) is a convex-concave lens;
the second lens (L2) is a paraxial region biconcave lens or a paraxial region convex-concave lens;
the third lens (L3) is a paraxial region biconvex lens, a paraxial region convex-concave lens or a paraxial region convex-flat lens.
3. Zoom lens according to claim 1, characterized in that the second lens (L2) and the third lens (L3) are aspherical lenses.
4. A zoom lens according to claim 1, wherein the effective aperture Φ of the image side surface of the first lens (L1) 2 And the radius of curvature R of the image side surface of the first lens (L1) 2 The following conditional expression is satisfied: phi is more than or equal to 0.8 percent 2 /(2R 2 )|≤1.0。
5. A zoom lens according to claim 1, wherein the refractive index Nd of the first lens (L1) 1 And Abbe number Vd 1 The following conditional expressions are satisfied, respectively:
1.5≤Nd 1 ≤1.8；
51.7≤Vd 1 ≤69.5。
6. a zoom lens according to claim 1, wherein the focal length f of the second lens (L2) 2 And a focal length f of the third lens (L3) 3 The following conditional expression is satisfied: f is more than or equal to 0.5% 2 /f 3 |≤0.8。
7. The zoom lens according to claim 1, wherein, in a direction from the object side to the image side along the optical axis,
the fourth lens (L4) is a paraxial region convex-concave lens or a paraxial region biconvex lens;
the fifth lens (L5) is a paraxial region biconcave lens, a paraxial region convex-concave lens, or a paraxial region plano-concave lens;
the sixth lens (L6) is a convex-concave lens;
the seventh lens (L7) is a biconvex lens.
8. Zoom lens according to claim 1, characterized in that the fourth lens (L4) and the fifth lens (L5) are aspherical lenses.
9. A zoom lens according to claim 1, wherein the refractive index Nd of the sixth lens (L6) 6 And Abbe number Vd 6 The following conditional expressions are satisfied, respectively:
1.9≤Nd 6 ≤2.1；
15.6≤Vd 6 ≤21.8；
refractive index Nd of the seventh lens (L7) 7 And Abbe number Vd 7 The following conditional expressions are satisfied, respectively:
1.5≤Nd 7 ≤1.7；
58.9≤Vd 7 ≤66.8。
10. a zoom lens according to claim 1, wherein the eighth lens (L8) is a paraxial region convex-concave lens in a direction from the object side to the image side along the optical axis.
11. A zoom lens according to claim 1, wherein the eighth lens (L8) is an aspherical lens.
12. A zoom lens according to claim 1, wherein the focal length F of the third lens group (G3) Ⅲ And an effective clear aperture phi of the eighth lens (L8) 8 The following conditional expression is satisfied: f is more than or equal to 1.5% Ⅲ /Ф 8 |≤5.2。
13. Zoom lens according to claim 1, characterized in that the ninth lens (L9) is a paraxial region biconvex lens.
14. A zoom lens according to claim 1, wherein the ninth lens (L9) is an aspherical lens.
15. Zoom lens according to claim 1, characterized in that the stop (S) is a fixed aperture stop, which stop (S) follows the second lens group (G2) along the optical axis during zooming.
16. A zoom lens according to claim 3, 8, 11 or 14, wherein the aspherical lens is a plastic lens.
17. The zoom lens according to any one of claims 1 to 15, wherein a focal length fl of the first lens group (G1) and a focal length Fw of the zoom lens at the wide-angle end satisfy the following conditional expression: f is more than or equal to 1.3 Ⅰ /Fw|≤1.7。
18. The zoom lens according to claim 16, wherein a focal length fl of the first lens group (G1) and a focal length Fw of the zoom lens at the wide-angle end satisfy the following conditional expression: f is more than or equal to 1.3 Ⅰ /Fw|≤1.7。
19. The zoom lens according to any one of claims 1 to 15, wherein a travel distance Δd of the second lens group (G2) from a wide angle end to a telephoto end of the zoom lens and an optical system total length L of the zoom lens satisfy the following conditional expression: the delta D/L is more than or equal to 0.1 and less than or equal to 0.2.
20. The zoom lens according to claim 16, wherein a travel distance Δd of the second lens group (G2) from a wide angle end to a telephoto end of the zoom lens and an optical system total length L of the zoom lens satisfy the following conditional expression: the delta D/L is more than or equal to 0.1 and less than or equal to 0.2.
21. Zoom lens according to any of claims 1 to 15, characterized in that the focal length F of the second lens group (G2) Ⅱ And a focal length Fw of the zoom lens at a wide angle end, a focal length F of the zoom lens at a telephoto endt satisfies the following conditional expressions, respectively:
1.7≤|F Ⅱ /Fw|≤2.1；
0.9≤|F Ⅱ /Ft|≤1.1。
22. a zoom lens according to claim 16, wherein the focal length F of the second lens group (G2) Ⅱ And a focal length Fw of the zoom lens at a wide-angle end and a focal length Ft of the zoom lens at a telephoto end satisfy the following conditional expressions, respectively:
1.7≤|F Ⅱ /Fw|≤2.1；
0.9≤|F Ⅱ /Ft|≤1.1。
23. zoom lens according to any of claims 1 to 15, characterized in that the focal length F of the fourth lens group (G4) Ⅳ And a focal length Fw of the zoom lens at a wide-angle end and a focal length Ft of the zoom lens at a telephoto end satisfy the following conditional expressions, respectively:
2.3≤|F Ⅳ /Fw|≤4.7；
1.2≤|F Ⅳ /Ft|≤2.5。
24. a zoom lens according to claim 16, wherein the fourth lens group (G4) has a focal length F Ⅳ And a focal length Fw of the zoom lens at a wide-angle end and a focal length Ft of the zoom lens at a telephoto end satisfy the following conditional expressions, respectively:
2.3≤|F Ⅳ /Fw|≤4.7；
1.2≤|F Ⅳ /Ft|≤2.5。
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CN201716463U (en) * 2009-09-11 2011-01-19 富士能株式会社 Zoom lens and camera device
JP2011059493A (en) * 2009-09-11 2011-03-24 Fujifilm Corp Zoom lens and imaging device
KR20110108840A (en) * 2010-03-30 2011-10-06 파워옵틱스 주식회사 Compact zoom lens
CN106990515A (en) * 2016-12-16 2017-07-28 嘉兴中润光学科技有限公司 A kind of zoom lens
CN214846007U (en) * 2021-03-24 2021-11-23 舜宇光学(中山)有限公司 Zoom lens

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN201716463U (en) * 2009-09-11 2011-01-19 富士能株式会社 Zoom lens and camera device
JP2011059493A (en) * 2009-09-11 2011-03-24 Fujifilm Corp Zoom lens and imaging device
KR20110108840A (en) * 2010-03-30 2011-10-06 파워옵틱스 주식회사 Compact zoom lens
CN106990515A (en) * 2016-12-16 2017-07-28 嘉兴中润光学科技有限公司 A kind of zoom lens
CN214846007U (en) * 2021-03-24 2021-11-23 舜宇光学(中山)有限公司 Zoom lens

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