WO2023207204A1

WO2023207204A1 - Zoom lens, camera module and electronic device

Info

Publication number: WO2023207204A1
Application number: PCT/CN2022/144201
Authority: WO
Inventors: 未来
Original assignee: Oppo广东移动通信有限公司
Priority date: 2022-04-25
Filing date: 2022-12-30
Publication date: 2023-11-02

Abstract

Provided are a zoom lens (21), a camera module (2) and an electronic device (100). The zoom lens (21) comprises a first lens group (G1) and a second lens group (G2) which are arranged from an object side to an image side, wherein the first lens group (G1) has a negative focal power, and the second lens group (G2) has a positive focal power; the zoom lens (21) has a telephoto end and a wide-angle end, and both the first lens group (G1) and the second lens group (G2) can move along an optical axis (X) to zoom and switch between the telephoto end and the wide-angle end; the number of critical points of at least one lens in the zoom lens (21) is greater than or equal to 2; and the wide-angle end of the zoom lens satisfies the equation of 2.5 < TTLw/ImgH < 4, where TTLw is the total optical length of the zoom lens (21) when the zoom lens is at the wide-angle end, and ImgH is the image height. The zoom lens can improve the imaging quality when being applied to an electronic device.

Description

Zoom lenses, camera modules and electronic equipment

This application claims the priority of the Chinese patent application submitted to the China Patent Office on April 25, 2022, with the application number 202210441771.9 and the application name "zoom lens, camera module and electronic equipment". This application also claims priority in April 2022. The priority of the Chinese patent application submitted to the China Patent Office on March 25, with the application number 202210439560.1 and the application name "zoom lens, camera module and electronic equipment", the contents of the above-mentioned earlier application are incorporated into this application by reference.

Technical field

This application relates to the field of optical imaging technology, specifically to a zoom lens, camera module and electronic equipment.

Background technique

With the development of camera technology, people have higher and higher requirements for the imaging quality of cameras. In related technologies, in order to achieve wide-angle shooting and telephoto shooting, a main camera lens and a telephoto lens are usually provided separately for independent shooting. However, this design will limit the improvement of imaging quality.

Contents of the invention

This application provides a zoom lens, a camera module and an electronic device. The zoom lens can improve imaging quality when applied to electronic devices.

In a first aspect, the present application provides a zoom lens, which includes: a first lens group and a second lens group arranged along the object side to the image side; the first lens group has negative refractive power, and the The second lens group has positive refractive power; the zoom lens has a telephoto end and a wide-angle end, and both the first lens group and the second lens group can move along the optical axis direction to adjust the position between the telephoto end and the wide-angle end. Zoom switching between the wide-angle ends; the number of critical points of at least one lens in the zoom lens is greater than or equal to 2; the wide-angle end of the zoom lens satisfies the relationship: 2.5＜TTLw/ImgH＜4; where, TTLw is The total optical length of the zoom lens when it is at the wide-angle end, ImgH is the image height.

In a second aspect, the present application provides a zoom lens, which includes: a first lens group and a second lens group arranged along the object side to the image side; the first lens group has positive optical power, and the third lens group has positive optical power. The two lens groups have negative refractive power; the zoom lens has a telephoto end and a wide-angle end, and both the first lens group and the second lens group can move along the optical axis direction to adjust the distance between the telephoto end and the wide-angle end. Zoom switching between the wide-angle ends; at least one lens in the zoom lens has a critical point number greater than or equal to 2; the telephoto end of the zoom lens satisfies the relationship: 1.8＜TTLt/ImgH＜3.6; where, TTLt is the total optical length of the zoom lens when it is at the telephoto end, and ImgH is the image height.

In a third aspect, the present application also provides a camera module, which includes a photosensitive element and a zoom lens, and the zoom lens can move relative to the photosensitive element along the optical axis direction.

In a fourth aspect, the application further provides an electronic device. The electronic device includes a device body and a camera module. The device body has an opening. The camera module is disposed in the device body corresponding to the opening. The zoom lens of the camera module can at least partially extend or retract the device body through the opening.

Description of the drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present application, the following will briefly introduce the drawings needed to be used in the implementation. Obviously, the drawings in the following description are some implementations of the present application. For ordinary people in the art For technical personnel, other drawings can also be obtained based on these drawings without exerting creative work.

FIG. 1 is a schematic diagram of an electronic device in a state according to an embodiment of the present application.

FIG. 2 is a schematic diagram of the electronic device shown in FIG. 1 in another state.

FIG. 3 is a schematic diagram of the electronic device shown in FIG. 2 from another perspective.

Figure 4 is a schematic diagram of a camera module provided by an embodiment of the present application.

FIG. 5 is a schematic diagram of the zoom lens provided in Embodiment 1 of the present application in a retracted state.

FIG. 6 is a schematic diagram of the zoom lens shown in FIG. 5 at the wide-angle end and the telephoto end.

FIG. 7 is a schematic diagram of a lens with a critical point provided by an embodiment of the present application.

FIG. 8 is an astigmatism curve of the zoom lens shown in Embodiment 1 when it is at the wide-angle end.

FIG. 9 is an on-axis chromatic aberration curve of the zoom lens shown in Embodiment 1 when it is at the wide-angle end.

FIG. 10 is a distortion curve of the zoom lens shown in Embodiment 1 when it is at the wide-angle end.

FIG. 11 is an astigmatism curve of the zoom lens shown in Embodiment 1 when it is at the telephoto end.

FIG. 12 is an axial chromatic aberration curve of the zoom lens shown in Embodiment 1 when it is at the telephoto end.

Figure 13 is a distortion curve of the zoom lens shown in Embodiment 1 when it is at the telephoto end.

FIG. 14 is a schematic diagram of the zoom lens provided in Embodiment 2 of the present application in a retracted state.

FIG. 15 is a schematic diagram of the zoom lens shown in FIG. 14 at the wide-angle end and the telephoto end.

FIG. 16 is an astigmatism curve of the zoom lens shown in Example 2 when it is at the wide-angle end.

FIG. 17 is an on-axis chromatic aberration curve of the zoom lens shown in Example 2 when it is at the wide-angle end.

FIG. 18 is a distortion curve of the zoom lens shown in Embodiment 2 when it is at the wide-angle end.

Figure 19 is an astigmatism curve when the zoom lens shown in Example 2 is at the telephoto end.

Figure 20 is an axial chromatic aberration curve of the zoom lens shown in Example 2 when it is at the telephoto end.

Figure 21 is a distortion curve of the zoom lens shown in Embodiment 2 when it is at the telephoto end.

FIG. 22 is a schematic diagram of the zoom lens provided in Embodiment 3 of the present application in a retracted state.

FIG. 23 is a schematic diagram of the zoom lens shown in FIG. 22 at the wide-angle end and the telephoto end.

FIG. 24 is an astigmatism curve of the zoom lens shown in Example 3 when it is at the wide-angle end.

FIG. 25 is an axial chromatic aberration curve of the zoom lens shown in Example 3 when it is at the wide-angle end.

FIG. 26 is a distortion curve of the zoom lens shown in Embodiment 3 when it is at the wide-angle end.

Figure 27 is an astigmatism curve of the zoom lens shown in Example 3 when it is at the telephoto end.

Figure 28 is an on-axis chromatic aberration curve of the zoom lens shown in Example 3 when it is at the telephoto end.

Figure 29 is a distortion curve of the zoom lens shown in Embodiment 3 when it is at the telephoto end.

FIG. 30 is a schematic diagram of the zoom lens provided in Embodiment 4 of the present application in a retracted state.

FIG. 31 is a schematic diagram of the zoom lens shown in FIG. 30 at the wide-angle end and the telephoto end.

Figure 32 is an astigmatism curve when the zoom lens shown in Example 4 is at the wide-angle end.

FIG. 33 is an axial chromatic aberration curve of the zoom lens shown in Example 4 when it is at the wide-angle end.

FIG. 34 is a distortion curve of the zoom lens shown in Embodiment 4 when it is at the wide-angle end.

Figure 35 is an astigmatism curve of the zoom lens shown in Example 4 when it is at the telephoto end.

Figure 36 is an axial chromatic aberration curve of the zoom lens shown in Example 4 when it is at the telephoto end.

Figure 37 is a distortion curve of the zoom lens shown in Example 4 when it is at the telephoto end.

FIG. 38 is a schematic diagram of the zoom lens provided in Embodiment 5 of the present application in a retracted state.

FIG. 39 is a schematic diagram of the zoom lens shown in FIG. 38 at the wide-angle end and the telephoto end.

Figure 40 is an astigmatism curve when the zoom lens shown in Example 5 is at the wide-angle end.

Figure 41 is an on-axis chromatic aberration curve of the zoom lens shown in Example 5 when it is at the wide-angle end.

Figure 42 is a distortion curve of the zoom lens shown in Example 5 when it is at the wide-angle end.

Figure 43 is an astigmatism curve of the zoom lens shown in Example 5 when it is at the telephoto end.

Figure 44 is an axial chromatic aberration curve of the zoom lens shown in Example 5 when it is at the telephoto end.

Figure 45 is a distortion curve of the zoom lens shown in Embodiment 5 when it is at the telephoto end.

FIG. 46 is a schematic diagram of the zoom lens provided in Embodiment 6 of the present application in a retracted state.

FIG. 47 is a schematic diagram of the zoom lens shown in FIG. 46 at the wide-angle end and the telephoto end.

Figure 48 is an astigmatism curve when the zoom lens shown in Example 6 is at the wide-angle end.

Figure 49 is an on-axis chromatic aberration curve when the zoom lens shown in Example 6 is at the wide-angle end.

Figure 50 is a distortion curve of the zoom lens shown in Embodiment 6 when it is at the wide-angle end.

Figure 51 is an astigmatism curve of the zoom lens shown in Example 6 when it is at the telephoto end.

Figure 52 is an axial chromatic aberration curve of the zoom lens shown in Example 6 when it is at the telephoto end.

Figure 53 is a distortion curve of the zoom lens shown in Example 6 when it is at the telephoto end.

FIG. 54 is a schematic diagram of an electronic device in a state according to an embodiment of the present application.

FIG. 55 is a schematic diagram of the electronic device shown in FIG. 54 in another state.

FIG. 56 is a schematic diagram of the electronic device shown in FIG. 55 from another perspective.

Figure 57 is a schematic diagram of the zoom lens provided in Embodiment 1 of the present application in a retracted state.

FIG. 58 is a schematic diagram of the zoom lens shown in FIG. 57 at the wide-angle end and the telephoto end.

FIG. 59 is a schematic diagram of a zoom lens including a third lens group provided by an embodiment of the present application.

Figure 60 is a schematic diagram of a lens with a critical point provided by an embodiment of the present application.

FIG. 61 is a schematic diagram of a zoom lens including a first bearing member and a second bearing member according to an embodiment of the present application.

Figure 62 is an astigmatism curve when the zoom lens shown in Example 1 is at the wide-angle end.

Figure 63 is an axial chromatic aberration curve when the zoom lens shown in Example 1 is at the wide-angle end.

FIG. 64 is a distortion curve of the zoom lens shown in Embodiment 1 when it is at the wide-angle end.

Figure 65 is an astigmatism curve when the zoom lens shown in Example 1 is at the telephoto end.

Figure 66 is an axial chromatic aberration curve of the zoom lens shown in Example 1 when it is at the telephoto end.

Figure 67 is a distortion curve when the zoom lens shown in Embodiment 1 is at the telephoto end.

Figure 68 is a schematic diagram of the zoom lens provided in Embodiment 2 of the present application in a retracted state.

FIG. 69 is a schematic diagram of the zoom lens shown in FIG. 68 at the wide-angle end and the telephoto end.

Figure 70 is an astigmatism curve when the zoom lens shown in Example 2 is at the wide-angle end.

Figure 71 is an axial chromatic aberration curve of the zoom lens shown in Example 2 when it is at the wide-angle end.

Figure 72 is a distortion curve of the zoom lens shown in Example 2 when it is at the wide-angle end.

Figure 73 is an astigmatism curve when the zoom lens shown in Example 2 is at the telephoto end.

Figure 74 is an axial chromatic aberration curve of the zoom lens shown in Example 2 when it is at the telephoto end.

Figure 75 is a distortion curve of the zoom lens shown in Example 2 when it is at the telephoto end.

Figure 76 is a schematic diagram of the zoom lens provided in Embodiment 3 of the present application in a retracted state.

FIG. 77 is a schematic diagram of the zoom lens shown in FIG. 76 at the wide-angle end and the telephoto end.

Figure 78 is an astigmatism curve when the zoom lens shown in Example 3 is at the wide-angle end.

Figure 79 is an on-axis chromatic aberration curve when the zoom lens shown in Example 3 is at the wide-angle end.

Figure 80 is a distortion curve of the zoom lens shown in Embodiment 3 when it is at the wide-angle end.

Figure 81 is an astigmatism curve when the zoom lens shown in Example 3 is at the telephoto end.

Figure 82 is an axial chromatic aberration curve of the zoom lens shown in Example 3 when it is at the telephoto end.

Figure 83 is a distortion curve of the zoom lens shown in Example 3 when it is at the telephoto end.

Detailed ways

The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are only some of the embodiments of the present application, rather than all of the embodiments. Based on the embodiments in this application, all other embodiments obtained by those of ordinary skill in the art without creative efforts fall within the scope of protection of this application.

Reference herein to "an embodiment" or "an implementation" means that a particular feature, structure or characteristic described in connection with the example or implementation may be included in at least one embodiment of the present application. The appearances of this phrase in various places in the specification are not necessarily all referring to the same embodiment, nor are separate or alternative embodiments mutually exclusive of other embodiments. Those skilled in the art understand, both explicitly and implicitly, that the embodiments described herein may be combined with other embodiments.

The present application provides a zoom lens, which includes: a first lens group and a second lens group arranged along the object side to the image side; the first lens group has negative refractive power, and the second lens group It has positive optical power; the zoom lens has a telephoto end and a wide-angle end, and both the first lens group and the second lens group are movable along the optical axis direction to adjust the zoom lens at the telephoto end and the wide-angle end. Switch between zooms; at least one lens in the zoom lens has a critical point number greater than or equal to 2; the wide-angle end of the zoom lens satisfies the relationship: 2.5＜TTLw/ImgH＜4; where, TTLw is the zoom lens The total optical length at the wide-angle end, ImgH is the image height.

Wherein, the zoom lens also has a retracted state. When the zoom lens is in the retracted state, the relationship is satisfied: cTTL<TTLw and cTTL<TTLt, where cTTL is the optical power of the zoom lens when it is in the retracted state. The total length, TTLt, is the total optical length of the zoom lens when it is at the telephoto end.

Wherein, the shrinkage state of the zoom lens satisfies the relationship: 1<cTTL/ImgH<2.

Wherein, when the zoom lens switches from the retracted state to the telephoto end, the first lens group and the second lens group move toward the object side along the optical axis.

Wherein, during the zooming process of the zoom lens from the wide-angle end to the telephoto end, the first lens group moves toward the image side along the optical axis, and the second lens group moves toward the object side along the optical axis.

Wherein, the zoom lens further includes an aperture, and the aperture is arranged on the object side of the second lens group or inside the second lens group. During the zooming process of the zoom lens, the aperture and The second lens group moves synchronously.

Wherein, the zoom lens further includes a third lens group with negative refractive power, and the third lens group is fixedly disposed on the image side of the second lens group.

The total number of lenses in the third lens group is 1-2.

Wherein, the total number of lenses in the first lens group is 2-3; and/or the total number of lenses in the second lens group is 3-5.

Wherein, the zoom lens satisfies the relational expression: 1<fw/ImgH<1.7, where fw is the focal length of the wide-angle end.

Wherein, the zoom lens satisfies the relationship: -3<f1/f2<-1.2, where f1 is the focal length of the first lens group, and f2 is the focal length of the second lens group.

Wherein, the zoom lens satisfies the relationship: 0.05＜Δd/TTLw＜0.25, where Δd is the movement of the second lens group during the zooming process of the zoom lens from the wide-angle end to the telephoto end. distance.

Wherein, the zoom lens satisfies the relationship: 1.5<tan(hFOVw)/tan(hFOVt), where hFOVw is the half-view angle when the zoom lens is at the wide-angle end, and hFOVt is when the zoom lens is at the telephoto end. half-picture angle.

Wherein, the zoom lens satisfies the relationship ft/ENPt<3, where ft is the focal length of the telephoto end, and ENPt is the entrance pupil diameter when the zoom lens is at the telephoto end.

Wherein, the most object-side lens of the first lens group has negative refractive power, and/or the most object-side lens of the second lens group has positive refractive power.

Wherein, the total number of lenses N in the zoom lens satisfies: 5≤N≤10.

The present application provides a zoom lens, which includes: a first lens group and a second lens group arranged along the object side to the image side; the first lens group has positive optical power, and the second lens group has Negative refractive power; the zoom lens has a telephoto end and a wide-angle end, and both the first lens group and the second lens group can move along the optical axis direction to adjust the position between the telephoto end and the wide-angle end. Switch between zooms; at least one lens in the zoom lens has a critical point number greater than or equal to 2; the telephoto end of the zoom lens satisfies the relationship: 1.8＜TTLt/ImgH＜3.6; where, TTLt is the zoom The total optical length of the lens when it is at the telephoto end, and ImgH is the image height.

Wherein, the zoom lens also has a retracted state. When the zoom lens is in the retracted state, the relationship is satisfied: cTTL<TTLw and cTTL<TTLt, where cTTL is the optical power of the zoom lens when it is in the retracted state. The total length, TTLw, is the total optical length of the zoom lens when it is at the wide-angle end.

Wherein, when the zoom lens switches from the retracted state to the wide-angle end, the first lens group moves toward the object side along the optical axis.

Wherein, during the zooming process of the zoom lens from the wide-angle end to the telephoto end, the first lens group moves toward the object side along the optical axis, and the second lens group moves toward the object side along the optical axis.

Wherein, the zoom lens further includes an aperture, and the aperture is disposed on the object side of the first lens group or inside the first lens group or on the image side of the first lens group. The zoom lens During the zooming process, the diaphragm moves along with the first lens group.

Wherein, the zoom lens further includes a third lens group, and the third lens group is fixedly disposed on the image side of the second lens group.

The total number of lenses in the third lens group is 1-2.

Wherein, the total number of lenses in the first lens group is 3-5; and/or the total number of lenses in the second lens group is 2-4.

Wherein, the zoom lens satisfies the relationship: -1<f1/f2<-0.5, where f1 is the focal length of the first lens group, and f2 is the focal length of the second lens group.

Wherein, the zoom lens satisfies the relationship: 0.15＜Δd/TTLt＜0.5, where Δd is the movement of the first lens group during the zooming process of the zoom lens from the wide-angle end to the telephoto end. distance.

Wherein, the zoom lens satisfies the relationship: fw/ENPw<2.4, where fw is the focal length of the wide-angle end, and ENPw is the entrance pupil diameter when the zoom lens is at the wide-angle end.

Wherein, the lens on the most image side of the first lens group has positive refractive power.

Wherein, the total number of lenses N in the zoom lens satisfies: 5≤N≤10.

This application also provides a camera module. The camera module includes a photosensitive element and a zoom lens. The zoom lens can move relative to the photosensitive element along the optical axis direction.

This application also provides an electronic device. The electronic device includes a device body and a camera module. The device body has an opening. The camera module is arranged in the device body corresponding to the opening. The camera module The zoom lens can be extended or retracted from the device body at least partially through the opening.

The following is divided into the first part and the second part to introduce the two different zoom lenses, camera modules and electronic equipment provided by this application. Among them, the first part comes from the prior application with application number 202210441771.9, and the second part comes from the prior application with application number 202210439560.1.

Part 1 (corresponding to Figure 1 to Figure 53)

Please refer to FIGS. 1 to 3 . This application provides an electronic device 100 . The electronic device 100 includes a device body 1 and a camera module 2 . The device body 1 has an opening K14, and the camera module 2 is arranged in the device body 1 corresponding to the opening K14. The zoom lens 21 of the camera module 2 can at least partially extend or retract the device body 1 through the opening K14. When the user needs to take pictures, the zoom lens 21 can be controlled to extend from the device body 1 through the opening K14 (as shown in FIG. 2 ). When the user does not need to take pictures, the zoom lens 21 can be controlled to retract into the device body 1 through the opening K14 (as shown in FIG. 1 ).

The electronic device 100 may be a mobile phone, a tablet computer, a notebook computer, a wearable device (such as a smart watch, a bracelet, a VR device, etc.), a television, an e-reader and other devices.

The device body 1 refers to the main part of the electronic device 100. The main part includes electronic components that realize the main functions of the electronic device 100 and a housing that protects and carries these electronic components. The device body 1 may include a display screen 11, a middle frame 12, and a back cover 13 (as shown in Figure 3). The display screen 11 and the back cover 13 are both connected to the middle frame 12, and are arranged on opposite sides of the middle frame 12. And the sides of the middle frame 12 are exposed outside the back cover 13 and the display screen 11 .

It should be noted that, according to actual needs, the camera module 2 can be disposed on any side of the electronic device 100, which is not limited in this application. Taking a mobile phone as an example, the camera module 2 can be installed on the front, back, or side of the mobile phone. The so-called front refers to the side of the mobile phone with the display screen 11; the so-called back refers to the side of the mobile phone with the back cover 13; and the so-called side refers to the circumferential side of the middle frame 12 of the mobile phone. It can be understood that, depending on the type of electronic device 100, the definitions of the front, back, side, etc. may be different, and other types of electronic devices 100 will not be described in detail here.

Furthermore, the opening K14 may be opened on the back cover 13 . In other embodiments, the opening K14 may also be provided on the display screen 11 ; or, the opening K14 may be provided on the middle frame 12 . When the back cover 13 has the opening K14, the camera module 2 is a rear camera. When the opening K14 is provided on the display screen 11, the camera module is a front camera. It can be understood that the introduction of the device body 1 in this embodiment is only an introduction to an application scenario of the camera module 2 and should not be understood as a limitation of the electronic device 100 provided in this application.

In related technologies, as people pursue higher and higher imaging quality of electronic devices with shooting functions, such as high image quality and high pixels, it is usually necessary to design the photosensitive elements and lenses in the camera module. For example, if a sensor with an outsole is used, since the distance between the sensor and the lens cannot be adjusted, the distance between the lens and the sensor needs to be designed to be longer. When the field of view (Field of Vision, FOV) is basically unchanged, the distance between the lens and the photosensitive element is longer, which means that the total length of the camera module will also be longer. When camera modules are used in electronic devices, the result is that the body of the electronic device will become thicker and thicker, which is not conducive to the thinning of the electronic device. In other words, for thin and light electronic devices, the length of the camera module will also be limited due to the thickness limitation of the electronic device. When the thickness of the camera module is limited, since the distance between the photosensitive element and the lens is not adjustable, the distance between the lens and the photosensitive element in the camera module will be limited. If the camera module is designed to be thicker and the electronic device is thinner, it may cause the camera module to form a thicker bulge on the back cover of the electronic device. Therefore, when the camera module in the related art is applied to an electronic device, it is impossible to achieve the compatibility of thinning and lightness of the electronic device and high imaging quality of the camera module.

In the electronic device 100 provided in the embodiment of the present application, since the zoom lens 21 can extend or retract the device body 1 through the opening K14, the camera module 2 can have a larger focal length without affecting the electronic device. The thickness of the electronic device 100 is 100, thereby solving the problem of incompatibility between the thinness and lightness of the electronic device 100 and the high imaging quality of the camera module 2 .

Please refer to Figure 4. This application also provides a camera module 2. The camera module 2 includes a filter 22, a photosensitive element 23 and a zoom lens 21 described in any of the following embodiments. The zoom lens 21, the filter 22, and the photosensitive element 23 are arranged in sequence along the optical axis X direction. When shooting, the external light passes through the zoom lens 21 and the filter 22 in sequence, and finally reaches the photosensitive element 23 . The first lens group G1 and the second lens group G2 of the zoom lens 21 can move relative to the photosensitive element 23 along the optical axis X direction. It should be noted that the structure shown in Figure 4 is only an illustrative description and should not be regarded as a limitation of the present application.

The zoom lens 21 is used to collect light from the photographed scene and focus the light on the photosensitive element 23 . The filter 22 is used to eliminate unnecessary light to improve effective resolution and color reproduction. The filter 22 may be, but is not limited to, an infrared filter 22 . The photosensitive element 23 (Sensor) is also called a photosensitive chip or an image sensor, and is used to receive light passing through the filter 22 and convert the optical signal into an electrical signal. The photosensitive element 23 may be a Charge Coupled Device (CCD) or a Complementary Metal Oxide Semiconductor (CMOS). The photosensitive element 23 has an imaging surface S231, and the imaging surface S231 is a target surface on the photosensitive element 23 that receives light.

It should be noted that the imaging surface S231 and the optical filter 22 involved in the following embodiments of the zoom lens 21 are used to assist in describing the positions and conditions of the first lens group G1 and the second lens group G2, and are not The zoom lens 21 includes a photosensitive element 23 having an imaging surface S231 and a filter 22 .

The zoom lens 21 in the above-mentioned camera module 2 will be introduced in detail below with reference to the accompanying drawings.

Referring to FIG. 5 , the present application also provides a zoom lens 21 . The zoom lens 21 includes: a first lens group G1 and a second lens group G2 arranged along the object side to the image side. The object side and the image side respectively refer to: with the zoom lens 21 as the boundary, the side where the photographed object is located is the object side, and the side where the image formed by the photographed object is located is the image side. Therefore, when shooting, light first passes through the first lens group G1 closer to the object side, and then passes through the second lens group G2 closer to the image side.

The first lens group G1 has negative optical power, and the second lens group G2 has positive optical power. Wherein, the optical power (focal power) represents the ability of the optical system (lens or lens group) to deflect light. Generally speaking, optical power is also the reciprocal of the image-side focal length. The optical power of an optical system is positive, which means it has a converging effect on light. The power of an optical system is negative, which means it diffuses light.

The first lens group G1 and the second lens group G2 are both used to achieve zooming through movement, so they can both be called zoom lens groups.

Either one of the first lens group G1 and the second lens group G2 is a compensation lens group. That is to say, the first lens group G1 is a compensation lens group, or the second lens group G2 is a compensation lens group. The so-called compensation lens group refers to a lens group used to compensate the position of the image plane so that the focus of objects photographed at different distances falls on the imaging plane S231.

Optionally, the object-side lens of the first lens group G1 has negative refractive power, so that the zoom lens 21 can provide better imaging effects.

Optionally, the object-side lens of the second lens group G2 has positive refractive power, so that the zoom lens 21 can provide better imaging effects.

Wherein, the most object-side lens of the first lens group G1 refers to the lens in the first lens group G1 that is closest to the object side. Similarly, the most object-side lens of the second lens group G2 refers to the lens closest to the object side in the second lens group G2.

Referring to FIG. 6 , the zoom lens 21 has a telephoto end and a wide-angle end. Both the first lens group G1 and the second lens group G2 can move along the optical axis X direction to zoom switch between the telephoto end and the wide-angle end. The telephoto end refers to the state when the focal length of the zoom lens 21 is maximum, and the telephoto end can also be called the telephoto state. The wide-angle end refers to the state when the focal length of the zoom lens 21 is the smallest, and the wide-angle end can also be called the wide-angle state. The positions of the first lens group G1 and the second lens group G2 when the zoom lens 21 is at the telephoto end are different from the positions of the first lens group G1 and the second lens group G2 when the zoom lens 21 is at the wide-angle end. Therefore, the telephoto end and the wide-angle end are two different shooting states of the zoom lens 21 , where the telephoto end is used for telephoto shooting and the wide-angle end is used for wide-angle shooting.

In related technology, mobile phones are equipped with at least three lenses, including a telephoto lens, a main camera lens, and an ultra-wide-angle lens. Among them, the telephoto lens is used for telephoto shooting, and the main camera and ultra-wide-angle lens are both used for wide-angle shooting, and the field of view of the main camera is smaller than that of the ultra-wide-angle lens. However, this design will first make the entire camera module larger and increase the product cost. In addition, since the lenses for different purposes are set up independently, each lens can only be equipped with a small sensor element, thus affecting the imaging. quality.

In the zoom lens 21 provided in the embodiment of the present application, since both the first lens group G1 and the second lens group G2 can move along the optical axis X direction, this can be achieved by moving the first lens group G1 and the second lens group G2 The zoom lens 21 zooms and switches between a telephoto end and a wide-angle end. Compared with related technologies, the zoom lens 21 provided in this embodiment is equivalent to integrating the telephoto lens and the main camera lens, thereby reducing the module volume and cost, and can be matched with the outsole photosensitive element 23 (such as Using a 1/1.28-inch photosensitive element 23), it can achieve 50-megapixel imaging from the wide-angle end to the telephoto end, thereby improving imaging quality (such as achieving high-pixel shooting and reducing the signal-to-noise ratio).

Optionally, the wide-angle end of the zoom lens 21 satisfies the relationship: 2.5<TTLw/ImgH<4. Wherein, TTLw is the total optical length of the zoom lens 21 when it is at the wide-angle end, ImgH is the image height, and the image height refers to half of the diagonal length of the effective pixel area of the imaging surface S231. It should be noted that the total optical length refers to the distance from the surface of the first lens group G1 closest to the object side to the imaging surface S231. Please refer to here for the following description of the total optical length.

The TTLw/ImgH may be, but is not limited to, 2.6, 2.7, 2.8, 2.9, 3.0, 3.1, 3.2, 3.3, 3.4, 3.5, 3.6, 3.7, 3.8, 3.9, etc. For example, TTLw is 20mm and ImgH is 6.450mm; or TTLt is 23.378mm and ImgH is 6.450mm; or TTLt is 23.5mm and ImgH is 6.450mm.

Since the zoom lens 21 satisfies the above relational expression, the zoom lens 21 can not only be miniaturized, but also effectively maintain good optical performance. It can be understood that the miniaturized zoom lens 21 is more suitable for electronic devices 100 that require thinness and lightness, such as mobile phones.

In related technologies, zoomable camera modules have been applied to electronic devices such as mobile phones that have thinning and lightness requirements. Specifically, since the zoom function requires the lens in the camera module to move relative to the photosensitive element, the total length of the camera module must be longer, which is generally greater than the thickness of the electronic device. In order to prevent electronic devices from being too thick, periscope cameras are usually used, and the length direction of the periscope camera is arranged in accordance with the width direction (or length direction) of the electronic device, that is, the length direction of the periscope camera is in line with the length direction of the electronic device. The thickness direction is set vertically. The periscope camera is provided with a prism, which is used to receive and reflect external light so that the reflected light propagates along the length of the periscope camera. However, periscope cameras are suitable for telephoto shooting, but not for wide-angle shooting, because wide-angle shooting requires the camera to have a large field of view. As the field of view increases, the thickness of the prism will also increase, which cannot satisfy electronic equipment. thickness of. Furthermore, specifications such as aperture and peripheral brightness are also limited by the thickness of the prism.

In this application, when the zoom lens 21 is applied to the electronic device 100, the zoom lens 21 can be extended or retracted through the opening K14 on the device body 1, so that the first lens group G1 and the second lens group G2 are opposite to the photosensitive element 23 movement to achieve zoom. This structural form does not involve prisms, so the technical problems caused by the above-mentioned prisms will not arise. Therefore, the zoom lens 21 provided by this application can improve imaging quality.

Please refer to FIG. 5 . The zoom lens 21 also has a retracted state. When the zoom lens 21 is in the retracted state, the relationship expressions are satisfied: cTTL<TTLw and cTTL<TTLt. Wherein, cTTL is the total optical length when the zoom lens 21 is in the retracted state, and TTLt is the total optical length when the zoom lens 21 is at the telephoto end. In other words, among the above three states, the total optical length cTTL when the zoom lens 21 is in the retracted state is the shortest, which is smaller than the total optical length corresponding to the telephoto end and the wide-angle end. Therefore, cTTL is the minimum total optical length of the zoom lens 21 . Therefore, when the user needs to take pictures, the user can control the zoom lens 21 to extend to switch to the wide-angle end or the telephoto end. When the user does not need to take pictures, the user can control the zoom lens 21 to shorten to switch to the contracted state. With reference to the electronic device 100 provided in the previous embodiment, when the zoom lens 21 is extended to switch to the wide-angle end or the telephoto end, it extends out of the electronic device 100 through the opening K14; when the zoom lens 21 is shortened to switch to the wide-angle end or the telephoto end, In the retracted state, the zoom lens 21 is retracted into the electronic device 100 .

Furthermore, the zoom lens 21 satisfies: cTTL<TTLt<TTLw. That is to say, the total optical length TTLw when the zoom lens 21 is at the wide-angle end is greater than the total optical length TTLt when the zoom lens 21 is at the telephoto end, so TTLw is the maximum total optical length of the zoom lens 21 .

From a zoom perspective, when the zoom lens 21 switches from the retracted state to the telephoto end, the first lens group G1 and the second lens group G2 move toward the object side along the optical axis. Move (please refer to Figure 5 and Figure 6). During the zooming process of the zoom lens 21 from the wide-angle end to the telephoto end, the first lens group G1 moves toward the image side along the optical axis, and the second lens group G2 moves toward the object side along the optical axis. (Please refer to Figure 6).

Optionally, the contraction state of the zoom lens satisfies the relationship: 1<cTTL/ImgH<2. Wherein, cTTL is the total optical length of the zoom lens 21 when it is in the contracted state, and ImgH is the image height.

Among them, cTTL/ImgH can be, but is not limited to, 1.1, 1.2, 1.24, 1.3, 1.4, 1.5, 1.55, 1.6, 1.7, 1.8, 1.9, etc. For example, cTTL is 10.5mm and ImgH is 6.45mm; or cTTL is 9.97mm and ImgH is 6.45mm; or cTTL is 9.98mm and ImgH is 6.45mm.

From the data exemplified above, it can be seen that when the value of ImgH is 6.45mm, the maximum total optical length TTLw of the zoom lens 21 is about 20mm, and the minimum total optical length cTTL is about 10mm. Therefore, the zoom lens 21 provided by the present application can be applied to applications with Electronic devices 100 that require thinness and lightness, such as mobile phones. This allows the zoom lens 21 to not only be miniaturized, but also effectively maintain good optical performance.

Optionally, when the zoom lens 21 is in the retracted state, both the first lens group G1 and the second lens group G2 are located in the device body 1 .

Optionally, when the zoom lens 21 is at the wide-angle end and the telephoto end, the first lens group G1 is at least partially located outside the device body 1, and the second lens group G2 is at least partially located outside the device body.

Referring to FIG. 6 , the zoom lens further includes an aperture 211 , which is disposed on the object side of the second lens group G2 or inside the second lens group G2 . That is to say, the diaphragm 211 may be disposed outside the second lens group G2, or may be disposed between two adjacent lenses in the second lens group G2. During the zooming process of the zoom lens, the diaphragm 211 and the second lens group G2 move synchronously. That is to say, the aperture 211 and the second lens group G2 are relatively fixed. The so-called relative fixation means that the aperture 211 and the second lens group G2 move together. The diaphragm 211 can be fixed on the second lens group G2 or can be fixed on other components, which is not limited here. Since the arrangement of the lenses in the second lens group G2 is relatively sparse, while the arrangement of the lenses in the first lens group G1 is relatively dense, it is possible to arrange the diaphragm 211 and the second lens group G2 together. The space is rationally utilized, and the radial size of each lens in the second lens group G2 is smaller, so the diaphragm 211 is more easily disposed together with the second lens group G2.

Optionally, please refer to Figures 5 and 6. The zoom lens 21 also includes a third lens group G3 with negative refractive power. The third lens group G3 is fixedly disposed on the image of the second lens group G2. side. The third lens group G3 is used to correct the chief ray incident angle (Chief Ray Angle, CRA) at the wide-angle end and telephoto end. CRA is a parameter of the Sensor, and the light needs to be incident on the Sensor at the required angle. For the zoom lens 21, the CRA at the wide-angle end and the telephoto end needs to be consistent. Therefore, the arrangement of the third lens group G3 can ensure that the zoom lens 21 has better imaging quality.

Optionally, the total number of lenses in the first lens group is 2-3, that is, 2 or 3.

Optionally, the total number of lenses in the second lens group is 3-5, that is, 3, 4, or 5 lenses.

Optionally, when the zoom lens 21 includes the third lens group G3, the total number of lenses in the third lens group is 1-2, that is, 1 or 2.

It should be noted that for one lens, each lens in the first lens group G1, the second lens group G2, and the third lens group G3 can be a glass lens or a plastic lens. Each lens can have positive or negative power. Furthermore, the surface of the lens close to the object side is called the object side, and the surface of the lens close to the image side is called the image side. The object side of each lens in the above three lens groups can be spherical, aspheric, etc., and similarly, the image side of each lens can be spherical, aspheric, etc.

Optionally, please refer to FIG. 7 . The number of critical points Q of at least one lens in the zoom lens 21 is greater than or equal to 2. In other words, the zoom lens 21 includes at least one lens with two critical points Q or above. The critical point Q refers to the tangent point on the lens surface that is tangent to a tangent plane perpendicular to the optical axis X, in addition to the intersection point with the optical axis X. When a lens has two or more critical points Q, the shape change of the lens in the radial direction will be relatively gentle, which can prevent the lens from being too thick and reduce the space occupied by the lens in the direction from the object side to the image side. space, so that the zoom lens 21 can be miniaturized, which is more conducive to application in electronic devices 100 that require thinness and lightness.

Optionally, please refer to FIG. 4 . The zoom lens 21 further includes a first bearing member 212 and a second bearing member 213 . The first bearing member 212 can be sleeved on the outer periphery of the second bearing member 213 . Both the first bearing member 212 and the second bearing member 213 can move relatively along the optical axis X direction. The first lens group G1 is fixed in the first carrier 212 . The first carrying member 212 is used to drive the first lens group G1 to move along the optical axis X relative to the photosensitive element 23 . The second lens group G2 is fixed in the second bearing member 213 . The second bearing member 213 is used to drive the second lens group G2 to move along the optical axis X relative to the photosensitive element 23 . The first bearing member 212 may be disposed in the opening K14 of the electronic device 100, and the first bearing member 212 and the second bearing member 213 may extend or retract the electronic device 100 through the opening K14. Of course, the first lens group G1 and the second lens group G2 can be carried in other ways. The structure shown in FIG. 4 is only an illustration and should not be regarded as a limitation of the present application.

Optionally, the zoom lens 21 satisfies the relationship: 1<fw/ImgH<1.7, where fw is the wide-angle end focal length.

fw/ImgH can be, but is not limited to, 1.1, 1.2, 1.3, 1.32, 1.4, 1.5, 1.6, etc. For example, fw is 7mm and ImgH is 6.45mm; or fw is 8.5mm and ImgH is 6.45mm; or fw is 8.6mm and ImgH is 6.45mm.

In this embodiment, the ratio of the wide-angle end focal length fw to the image height ImgH is set to be greater than 1 and less than 1.7, thereby ensuring that the wide-angle end focal length is within the common focal length range of the main camera of a mobile phone.

Optionally, the zoom lens 21 satisfies the relationship: -3<f1/f2<-1.2, where f1 is the focal length of the first lens group, and f2 is the focal length of the second lens group.

f1/f2 can be but is not limited to -2.9, -2.8, -2.7, -2.6, -2.5, -2.4, -2.3, -2.2, -2.1, -2, -1.9, -1.8, -1.7, -1.6, -1.5, -1.4, -1.3, etc. For example, f1 is -17.615mm and f2 is 8.495mm; or f1 is -13.251mm and f2 is 7.026mm; or f1 is -18.621mm and f2 is 8.523mm.

In this embodiment, the ratio of the focal length f1 of the first lens group G1 to the focal length f2 of the second lens group G2 is set to be greater than -3 and less than -1.2, so that the first lens group G1 and the second lens group G2 can be reasonably allocated The optical power relationship enables better focusing and zooming.

Optionally, the zoom lens 21 satisfies the relationship: 0.05＜Δd/TTLw＜0.25, where Δd is the zooming process of the zoom lens 21 from the wide-angle end to the telephoto end. The distance moved by the second lens group G2.

Δd/TTLw can be, but is not limited to, 0.06, 0.07, 0.08, 0.09, 0.1, 0.11, 0.12, 0.13, 0.14, 0.15, 0.16, 0.17, 0.18, 0.19, 0.2, 0.21, 0.22, 0.23, 0.24, etc. For example, Δd is 1.705mm and TTLw is 20mm; or Δd is 1.787mm and TTLw is 23.378mm; or Δd is 1.831mm and TTLw is 23.5mm.

In this embodiment, the ratio of the moving distance of the second lens group G2 from the wide-angle end to the telephoto end and the maximum total optical length TTLw of the zoom lens 21 is reasonably set between 0.05 and 0.25, so that a smaller lens can be used. The change amount of the group interval achieves a larger zoom ratio, which is beneficial to compressing the total length of the zoom lens 21 .

Optionally, the zoom lens 21 satisfies the relationship: 1.5<tan(hFOVw)/tan(hFOVt), where hFOVw is the half-view angle when the zoom lens 21 is at the wide-angle end, and hFOVt is the zoom lens 21 Half-frame angle at telephoto end. Wherein, the half picture angle refers to half of the field of view (Field of Vision, FOV).

tan(hFOVw)/tan(hFOVt) may be, but is not limited to, 1.6, 1.71, 1.8, 1.9, 2.0, 2.1, 2.2, 2.25, etc. For example, hFOVw is 52.806° and hFOVt is 32.913°; or hFOVw is 43.738° and hFOVt is 26.812°; or hFOVw is 43.935° and hFOVt is 26.855°.

In this embodiment, by setting the ratio of tan(hFOVw) to tan(hFOVt) to be greater than 1.5, the zoom magnification of the zoom lens 21 is greater than 1.5 times.

Optionally, the zoom lens 21 satisfies the relationship ft/ENPt<3, where ft is the focal length of the telephoto end, and ENPt is the entrance pupil diameter when the zoom lens 21 is at the telephoto end.

ft/ENPt can be, but is not limited to, 2.9, 2.8, 2.7, 2.6, 2.5, 2.4, 2.3, 2.2, 2.1, 2, 1.9, 1.8, 1.7, 1.6, 1.5, etc. For example, ft is 10.3mm and ENPt is 4.256mm; or ft is 12.5mm and ENPt is 5.208mm; or ft is 12.5mm and ENPt is 5.208mm.

In this embodiment, by setting the ratio of the focal length of the telephoto end to the entrance pupil diameter of the telephoto end to less than 3, the aperture of the telephoto end is less than 3, thereby improving the brightness and blur effect of the lens. Among them, as the brightness of the lens increases, more light enters the lens, which means that clear images can be captured at night.

Optionally, for any of the above embodiments, the total number of lenses N in the zoom lens 21 satisfies: 5≤N≤10. The total number of lenses N may be 5, or 6, or 7, or 8, or 9, or 10. For example, the total number of lenses in the first lens group G1 is 2, the total number of lenses in the second lens group G2 is 4, and the total number of lenses in the third lens group G3 is 0. Alternatively, the total number of lenses in the first lens group G1 is 2, the total number of lenses in the second lens group G2 is 4, and the total number of lenses in the third lens group G3 is 2.

When the number of lenses in the zoom lens is greater, the imaging effect of the zoom lens 21 is better. When the number of lenses in a zoom lens is smaller, the cost is lower and the minimum total optical length cTTL is smaller. When the total number of lenses N is less than 5, the imaging quality cannot be guaranteed; when the total number of lenses N is greater than 10, the total optical length of the zoom lens 21 is too large and is not suitable for application in the electronic device 100 that requires thinness and lightness. In the embodiment of the present application, the total number of lenses is selected between 5 and 10 by taking both imaging quality and total optical length into consideration, thereby ensuring that the zoom lens 21 has better imaging effects and at the same time achieving the beneficial effect of miniaturization of the zoom lens 21 .

Using the zoom lens 21 provided by this application, the maximum total optical length TTLw of the zoom lens 21 can be controlled below 26 mm (for example, 20 mm). The minimum total optical length cTTL of the zoom lens 21 can be controlled below 11 mm (for example, 10 mm). The field of view at the wide-angle end can be below 90 degrees (such as 85 degrees). The field of view angle at the telephoto end can be less than 52 degrees. Therefore, the zoom lens 21 provided by the present application can not only be well adapted to the electronic device 100 that requires thinness and lightness, but also has good shooting performance.

The zoom lens 21 provided by this application will be further described below through three sets of specific embodiments. In the following embodiments, the calculation formula of each aspheric surface is:

Among them, x is the distance sagittal height from the aspherical surface vertex when the aspherical surface is at a height h along the optical axis; c is the paraxial curvature of the aspherical surface, c=1/R (that is, the paraxial curvature c is the following table The reciprocal of the radius of curvature R); k is the cone coefficient (see table); Ai is the i-th order aspheric coefficient.

Example 1

Please refer to FIGS. 5 and 6 , wherein FIG. 6(a) is a schematic diagram of the zoom lens shown in FIG. 5 at the wide-angle end. FIG. 6(b) is a schematic diagram of the zoom lens shown in FIG. 5 at the telephoto end. The zoom lens 21 provided in this embodiment includes: a first lens group G1, a second lens group G2, and a third lens group G3 arranged along the object side to the image side. The first lens group G1 includes a first lens L1 and a second lens L2 arranged from the object side to the image side. The second lens group G2 includes a third lens L3, a fourth lens L4, a fifth lens L5, and a sixth lens L6 arranged from the object side to the image side. The third lens group G3 includes a seventh lens L7. The zoom lens 21 further includes an aperture 211 disposed between the second lens L2 and the third lens L3.

For specific data on the zoom lens provided in Embodiment 1, please refer to Tables 1 to 5.

Table 1 shows the relevant parameters of each lens, aperture, and filter of the zoom lens in Embodiment 1, including the radius of curvature R, the distance d, the refractive index Nd, and the Abbe coefficient Vd. Among them, the units of the radius of curvature R and the interval d are both millimeters (mm). In Table 1, surface numbers 1-19 are along the direction from the object side to the image side, marking the surface of the photographed object, each lens, aperture, filter, and imaging surface in sequence. Among them, the photographed object is marked as OBJ, the aperture is marked as STO, and the imaging surface is marked as IMA.

It should be noted that the interval d represents the distance d between the current surface and the subsequent surface along the optical axis. For example, the distance between surface 2 and surface 3 in Table 1 is 0.6, and the distance between surface 3 and surface 4 is 1.261. Please refer to the explanation here when the interval d is mentioned later.

Table 2 shows the variable interval d when the zoom lens changes from the wide-angle end to the telephoto end in Embodiment 1, that is, the corresponding variable interval d when the zoom lens is at the wide-angle end and the telephoto end.

Table 3 shows the k value and aspheric coefficient of the aspheric mirror surface of each lens in Example 1. Table 3 includes Table 3a, Table 3b, Table 3c, and Table 3d.

Table 4 shows the overall parameter data of the zoom lens in Example 1.

Table 5 shows the conditional expressions and corresponding data of the zoom lens in Embodiment 1. N in the table below is the number of lenses.

In this embodiment, by changing the distance d1 between the first lens group G1 and the diaphragm 211 along the optical axis X (that is, the distance between the image side of the second lens L2 and the diaphragm 211 along the optical axis The distance d2 between the lens group G2 and the third lens group G3 along the optical axis X (that is, the distance from the image side of the sixth lens L6 to the object side of the seventh lens L7 along the optical axis Switch between far end, wide-angle end and contracted state.

Please refer to FIGS. 8 to 10 , which show relevant graphs at the wide-angle end of the zoom lens.

Figure 8 is an astigmatism curve of the zoom lens in Example 1 when it is at the wide-angle end. The dotted line in the figure represents the meridian, the solid line represents the sagittal, and the corresponding light wavelength is 587.6nm.

Figure 9 is an on-axis chromatic aberration curve of the zoom lens in Example 1 when it is at the wide-angle end. The wavelength of light corresponding to the dotted line in the figure is 656.3nm, the wavelength of light corresponding to the solid line is 587.6nm, and the wavelength of light corresponding to the dotted line is 486.1nm.

Figure 10 is a distortion curve of the zoom lens in Example 1 when it is at the wide-angle end. The corresponding light wavelength in the figure is 587.6nm.

Please refer to FIGS. 11 to 13 , which show relevant graphs at the telephoto end of the zoom lens.

Figure 11 is an astigmatism curve when the zoom lens in Embodiment 1 is at the telephoto end. The dotted line in the figure represents the meridian, the solid line represents the sagittal, and the corresponding light wavelength is 587.6nm.

Figure 12 is an on-axis chromatic aberration curve of the zoom lens in Example 1 when it is at the telephoto end. The wavelength of light corresponding to the dotted line in the figure is 656.3nm, the wavelength of light corresponding to the solid line is 587.6nm, and the wavelength of light corresponding to the dotted line is 486.1nm.

Figure 13 is a distortion curve of the zoom lens in Example 1 when it is at the telephoto end. The corresponding light wavelength in the figure is 587.6nm.

It can be seen from Figures 8 to 13 that the zoom lens provided in Embodiment 1 has good imaging quality at both the wide-angle end and the telephoto end.

Example 2

Please refer to FIGS. 14 and 15 , wherein FIG. 15(a) is a schematic diagram of the zoom lens shown in FIG. 14 at the wide-angle end. FIG. 15(b) is a schematic diagram of the zoom lens shown in FIG. 14 at the telephoto end. The zoom lens 21 provided in this embodiment includes: a first lens group G1, a second lens group G2, and a third lens group G3 arranged along the object side to the image side. The first lens group G1 includes a first lens L1 and a second lens L2 arranged from the object side to the image side. The second lens group G2 includes a third lens L3, a fourth lens L4, a fifth lens L5, and a sixth lens L6 arranged from the object side to the image side. The third lens group G3 includes a seventh lens L7. The zoom lens 21 further includes an aperture 211 disposed between the second lens L2 and the third lens L3.

For specific data on the zoom lens provided in Embodiment 2, please refer to Tables 6 to 10.

Table 6 shows the relevant parameters of each lens, aperture, and filter of the zoom lens in Embodiment 2, including the radius of curvature R, the distance d, the refractive index Nd, and the Abbe coefficient Vd. Among them, the units of the radius of curvature R and the interval d are both millimeters (mm). In Table 6, surface numbers 1-19 are along the direction from the object side to the image side, marking the surface of the photographed object, each lens, diaphragm, filter and imaging surface in order. Among them, the photographed object is marked as OBJ, the aperture is marked as STO, and the imaging surface is marked as IMA.

Table 7 shows the variable interval d when the zoom lens changes from the wide-angle end to the telephoto end in Embodiment 2, that is, the corresponding variable interval d when the zoom lens is at the wide-angle end and the telephoto end.

Table 8 shows the k value and aspheric coefficient of the aspheric mirror surface of each lens in Example 2. Table 8 includes Table 8a, Table 8b, Table 8c, and Table 8d.

Table 9 shows the overall parameter data of the zoom lens in Example 2.

Table 10 shows the conditional expressions and corresponding data of the zoom lens in Example 2. N in the table below is the number of lenses.

Please refer to FIGS. 16 to 18 , which illustrate relevant graphs at the wide-angle end of the zoom lens.

Figure 16 is an astigmatism curve of the zoom lens in Example 2 when it is at the wide-angle end. The dotted line in the figure represents the meridian, the solid line represents the sagittal, and the corresponding light wavelength is 587.6nm.

Figure 17 is an on-axis chromatic aberration curve of the zoom lens in Example 2 when it is at the wide-angle end. The wavelength of light corresponding to the dotted line in the figure is 656.3nm, the wavelength of light corresponding to the solid line is 587.6nm, and the wavelength of light corresponding to the dotted line is 486.1nm.

Figure 18 is a distortion curve of the zoom lens in Example 2 when it is at the wide-angle end. The corresponding light wavelength in the figure is 587.6nm.

Please refer to FIGS. 19 to 21 , which show relevant graphs at the telephoto end of the zoom lens.

Figure 19 is an astigmatism curve when the zoom lens in Example 2 is at the telephoto end. The dotted line in the figure represents the meridian, the solid line represents the sagittal, and the corresponding light wavelength is 587.6nm.

Figure 20 is an axial chromatic aberration curve of the zoom lens in Example 2 when it is at the telephoto end. The wavelength of light corresponding to the dotted line in the figure is 656.3nm, the wavelength of light corresponding to the solid line is 587.6nm, and the wavelength of light corresponding to the dotted line is 486.1nm.

Figure 21 is a distortion curve of the zoom lens in Example 2 when it is at the telephoto end. The corresponding light wavelength in the figure is 587.6nm.

It can be seen from Figures 16 to 21 that the zoom lens provided in Embodiment 2 has good imaging quality at both the wide-angle end and the telephoto end.

Example 3

Please refer to FIGS. 22 and 23 , wherein FIG. 23(a) is a schematic diagram of the zoom lens shown in FIG. 22 at the wide-angle end. FIG. 23(b) is a schematic diagram of the zoom lens shown in FIG. 22 at the telephoto end. The zoom lens 21 provided in this embodiment includes: a first lens group G1, a second lens group G2, and a third lens group G3 arranged along the object side to the image side. The first lens group G1 includes a first lens L1 and a second lens L2 arranged from the object side to the image side. The second lens group G2 includes a third lens L3, a fourth lens L4, a fifth lens L5, and a sixth lens L6 arranged from the object side to the image side. The third lens group G3 includes a seventh lens L7. The zoom lens 21 further includes an aperture 211 disposed between the second lens L2 and the third lens L3.

For specific data on the zoom lens provided in Embodiment 3, please refer to Table 11 to Table 15.

Table 11 shows the relevant parameters of each lens, aperture, and filter of the zoom lens in Embodiment 3, including the radius of curvature R, the interval d, the refractive index Nd, and the Abbe coefficient Vd. Among them, the units of the radius of curvature R and the interval d are both millimeters (mm). In Table 11, surface numbers 1-19 mark the surface of the subject, each lens, aperture, filter, and imaging surface in sequence from the object side to the image side. Among them, the photographed object is marked as OBJ, the aperture is marked as STO, and the imaging surface is marked as IMA.

Table 12 shows the variable interval d when the zoom lens changes from the wide-angle end to the telephoto end in Embodiment 3, that is, the corresponding variable interval d when the zoom lens is at the wide-angle end and the telephoto end.

Table 13 shows the k value and aspheric coefficient of the aspheric mirror surface of each lens in Example 3. Table 13 includes Table 13a, Table 13b, Table 13c, and Table 13d.

Table 14 shows the overall parameter data of the zoom lens in Example 3.

Table 15 shows the conditional expressions and corresponding data of the zoom lens in Example 3. N in the table below is the number of lenses.

Please refer to FIGS. 24 to 26 , which show relevant graphs at the wide-angle end of the zoom lens.

Figure 24 is an astigmatism curve when the zoom lens in Example 3 is at the wide-angle end. The dotted line in the figure represents the meridian, the solid line represents the sagittal, and the corresponding light wavelength is 587.6nm.

Figure 25 is an on-axis chromatic aberration curve of the zoom lens in Example 3 when it is at the wide-angle end. The wavelength of light corresponding to the dotted line in the figure is 656.3nm, the wavelength of light corresponding to the solid line is 587.6nm, and the wavelength of light corresponding to the dotted line is 486.1nm.

Figure 26 is a distortion curve of the zoom lens in Example 3 when it is at the wide-angle end. The corresponding light wavelength in the figure is 587.6nm.

Please refer to FIGS. 27 to 29 , which show relevant curves at the telephoto end of the zoom lens.

Figure 27 is an astigmatism curve when the zoom lens in Example 3 is at the telephoto end. The dotted line in the figure represents the meridian, the solid line represents the sagittal, and the corresponding light wavelength is 587.6nm.

Figure 28 is an axial chromatic aberration curve of the zoom lens in Example 3 when it is at the telephoto end. The wavelength of light corresponding to the dotted line in the figure is 656.3nm, the wavelength of light corresponding to the solid line is 587.6nm, and the wavelength of light corresponding to the dotted line is 486.1nm.

Figure 29 is a distortion curve of the zoom lens in Example 3 when it is at the telephoto end. The corresponding light wavelength in the figure is 587.6nm.

It can be seen from Figures 24 to 29 that the zoom lens provided in Embodiment 3 has good imaging quality at both the wide-angle end and the telephoto end.

Example 4

Please refer to FIG. 30 and FIG. 31 , wherein FIG. 31(a) is a schematic diagram of the zoom lens shown in FIG. 30 at the wide-angle end. FIG. 31(b) is a schematic diagram of the zoom lens shown in FIG. 30 at the telephoto end. The zoom lens 21 provided in this embodiment includes: a first lens group G1, a second lens group G2, and a third lens group G3 arranged along the object side to the image side. The first lens group G1 includes a first lens L1 and a second lens L2 arranged from the object side to the image side. The second lens group G2 includes a third lens L3, a fourth lens L4, a fifth lens L5, and a sixth lens L6 arranged from the object side to the image side. The third lens group G3 includes a seventh lens L7 and an eighth lens L8 arranged from the object side to the image side. The zoom lens 21 further includes an aperture 211 disposed between the second lens L2 and the third lens L3.

For specific data on the zoom lens provided in Embodiment 4, please refer to Table 16 to Table 20.

Table 16 shows the relevant parameters of each lens, aperture, and filter of the zoom lens in Embodiment 4, including the radius of curvature R, the interval d, the refractive index Nd, and the Abbe coefficient Vd. Among them, the units of the radius of curvature R and the interval d are both millimeters (mm). In Table 16, surface numbers 1-21 are along the direction from the object side to the image side, marking the surface of the subject, each lens, diaphragm, filter and imaging surface in order. Among them, the photographed object is marked as OBJ, the aperture is marked as STO, and the imaging surface is marked as IMA.

Table 17 shows the variable interval d when the zoom lens changes from the wide-angle end to the telephoto end in Embodiment 4, that is, the corresponding variable interval d when the zoom lens is at the wide-angle end and the telephoto end.

Table 18 shows the k value and aspheric coefficient of the aspheric mirror surface of each lens in Example 4. Table 18 includes Table 18a, Table 18b, Table 18c, and Table 18d.

Table 19 shows the overall parameter data of the zoom lens in Example 4.

Table 20 shows the conditional expressions and corresponding data of the zoom lens in Example 4. N in the table below is the number of lenses.

Please refer to FIGS. 32 to 34 , which show relevant graphs at the wide-angle end of the zoom lens.

Figure 32 is an astigmatism curve when the zoom lens in Example 4 is at the wide-angle end. The dotted line in the figure represents the meridian, the solid line represents the sagittal, and the corresponding light wavelength is 587.6nm.

Figure 33 is an axial chromatic aberration curve of the zoom lens in Example 4 when it is at the wide-angle end. The wavelength of light corresponding to the dotted line in the figure is 656.3nm, the wavelength of light corresponding to the solid line is 587.6nm, and the wavelength of light corresponding to the dotted line is 486.1nm.

Figure 34 is a distortion curve of the zoom lens in Example 4 when it is at the wide-angle end. The corresponding light wavelength in the figure is 587.6nm.

Please refer to FIGS. 35 to 37 , which show relevant graphs at the telephoto end of the zoom lens.

Figure 35 is an astigmatism curve when the zoom lens in Example 4 is at the telephoto end. The dotted line in the figure represents the meridian, the solid line represents the sagittal, and the corresponding light wavelength is 587.6nm.

Figure 36 is an axial chromatic aberration curve of the zoom lens in Example 4 when it is at the telephoto end. In the figure, the wavelength of light corresponding to the dotted line is 656.3nm, the wavelength of light corresponding to the solid line is 587.6nm, and the wavelength of light corresponding to the dotted line is 486.1nm.

Figure 37 is a distortion curve of the zoom lens in Example 4 when it is at the telephoto end. The corresponding light wavelength in the figure is 587.6nm.

It can be seen from Figures 32 to 37 that the zoom lens provided in Embodiment 4 has good imaging quality at both the wide-angle end and the telephoto end.

Example 5

Please refer to FIGS. 38 and 39 , wherein FIG. 39(a) is a schematic diagram of the zoom lens shown in FIG. 38 at the wide-angle end. FIG. 39(b) is a schematic diagram of the zoom lens shown in FIG. 38 at the telephoto end. The zoom lens 21 provided in this embodiment includes: a first lens group G1, a second lens group G2, and a third lens group G3 arranged along the object side to the image side. Among them, the first lens group G1 includes a first lens L1, a second lens L2, and a third lens L3 arranged from the object side to the image side. The second lens group G2 includes a fourth lens L4, a fifth lens L5, a sixth lens L6, and a seventh lens L7 arranged from the object side to the image side. The third lens group G3 includes an eighth lens L8. The zoom lens 21 further includes an aperture 211 disposed between the third lens L3 and the fourth lens L4.

For specific data on the zoom lens provided in Embodiment 5, please refer to Table 21 to Table 25.

Table 21 shows the relevant parameters of each lens, aperture, and filter of the zoom lens in Embodiment 5, including the radius of curvature R, the interval d, the refractive index Nd, and the Abbe coefficient Vd. Among them, the units of the radius of curvature R and the interval d are both millimeters (mm). In Table 21, surface numbers 1-21 mark the surface of the subject, each lens, diaphragm, filter, and imaging surface in sequence along the direction from the object side to the image side. Among them, the photographed object is marked as OBJ, the aperture is marked as STO, and the imaging surface is marked as IMA.

Table 22 shows the variable interval d when the zoom lens changes from the wide-angle end to the telephoto end in Embodiment 5, that is, the variable interval d corresponding to when the zoom lens is at the wide-angle end and the telephoto end.

Table 23 shows the k value and aspheric coefficient of the aspheric mirror surface of each lens in Example 5. Table 23 includes Table 23a, Table 23b, Table 23c, and Table 23d.

Table 24 shows the overall parameter data of the zoom lens in Example 5.

Table 25 shows the conditional expressions and corresponding data of the zoom lens in Example 5. N in the table below is the number of lenses.

In this embodiment, by changing the distance d1 between the first lens group G1 and the diaphragm 211 along the optical axis X (that is, the distance between the image side of the third lens L3 and the diaphragm 211 along the optical axis The distance d2 between the lens group G2 and the third lens group G3 along the optical axis X (that is, the distance from the image side of the seventh lens L7 to the object side of the eighth lens L8 along the optical axis Switch between far end, wide-angle end and contracted state.

Please refer to FIGS. 40 to 42 , which show relevant graphs at the wide-angle end of the zoom lens.

Figure 40 is an astigmatism curve when the zoom lens in Example 5 is at the wide-angle end. The dotted line in the figure represents the meridian, the solid line represents the sagittal, and the corresponding light wavelength is 587.6nm.

Figure 41 is the axial chromatic aberration curve of the zoom lens in Example 5 when it is at the wide-angle end. The wavelength of light corresponding to the dotted line in the figure is 656.3nm, the wavelength of light corresponding to the solid line is 587.6nm, and the wavelength of light corresponding to the dotted line is 486.1nm.

Figure 42 is a distortion curve of the zoom lens in Example 5 when it is at the wide-angle end. The corresponding light wavelength in the figure is 587.6nm.

Please refer to FIGS. 43 to 45 , which show relevant graphs at the telephoto end of the zoom lens.

Figure 43 is an astigmatism curve when the zoom lens in Example 5 is at the telephoto end. The dotted line in the figure represents the meridian, the solid line represents the sagittal, and the corresponding light wavelength is 587.6nm.

Figure 44 is an axial chromatic aberration curve of the zoom lens in Example 5 when it is at the telephoto end. The wavelength of light corresponding to the dotted line in the figure is 656.3nm, the wavelength of light corresponding to the solid line is 587.6nm, and the wavelength of light corresponding to the dotted line is 486.1nm.

Figure 45 is a distortion curve of the zoom lens in Example 5 when it is at the telephoto end. The corresponding light wavelength in the figure is 587.6nm.

It can be seen from Figures 40 to 45 that the zoom lens provided in Embodiment 5 has good imaging quality at both the wide-angle end and the telephoto end.

Example 6

Please refer to FIGS. 46 and 47 , wherein FIG. 47(a) is a schematic diagram of the zoom lens shown in FIG. 46 at the wide-angle end. FIG. 47(b) is a schematic diagram of the zoom lens shown in FIG. 46 at the telephoto end. The zoom lens 21 provided in this embodiment includes: a first lens group G1, a second lens group G2, and a third lens group G3 arranged along the object side to the image side. Among them, the first lens group G1 includes a first lens L1, a second lens L2, and a third lens L3 arranged from the object side to the image side. The second lens group G2 includes a fourth lens L4, a fifth lens L5, a sixth lens L6, and a seventh lens L7 arranged from the object side to the image side. The third lens group G3 includes an eighth lens L8. The zoom lens 21 further includes an aperture 211 disposed between the third lens L3 and the fourth lens L4.

For specific data on the zoom lens provided in Embodiment 6, please refer to Table 26 to Table 30.

Table 26 shows the relevant parameters of each lens, aperture, and filter of the zoom lens in Embodiment 6, including the radius of curvature R, the interval d, the refractive index Nd, and the Abbe coefficient Vd. Among them, the units of the radius of curvature R and the interval d are both millimeters (mm). In Table 26, surface numbers 1-21 mark the surfaces of the photographed object, each lens, diaphragm, filter, and imaging surface in sequence along the direction from the object side to the image side. Among them, the photographed object is marked as OBJ, the aperture is marked as STO, and the imaging surface is marked as IMA.

Table 27 shows the variable interval d when the zoom lens changes from the wide-angle end to the telephoto end in Embodiment 6, that is, the variable interval d corresponding to when the zoom lens is at the wide-angle end and the telephoto end.

Table 28 shows the k value and aspheric coefficient of the aspheric mirror surface of each lens in Example 6. Table 28 includes Table 28a, Table 28b, Table 28c, Table 28d, and Table 28e.

Table 29 shows the overall parameter data of the zoom lens in Example 6.

Table 30 shows the conditional expressions and corresponding data of the zoom lens in Example 6. N in the table below is the number of lenses.

Please refer to FIGS. 48 to 50 , which show relevant graphs at the wide-angle end of the zoom lens.

Figure 48 is an astigmatism curve when the zoom lens in Example 6 is at the wide-angle end. The dotted line in the figure represents the meridian, the solid line represents the sagittal, and the corresponding light wavelength is 587.6nm.

Figure 49 is an on-axis chromatic aberration curve of the zoom lens in Example 6 when it is at the wide-angle end. The wavelength of light corresponding to the dotted line in the figure is 656.3nm, the wavelength of light corresponding to the solid line is 587.6nm, and the wavelength of light corresponding to the dotted line is 486.1nm.

Figure 50 is a distortion curve of the zoom lens in Example 6 when it is at the wide-angle end. The corresponding light wavelength in the figure is 587.6nm.

Please refer to FIGS. 51 to 53 , which show relevant graphs at the telephoto end of the zoom lens.

Figure 51 is an astigmatism curve when the zoom lens in Example 6 is at the telephoto end. The dotted line in the figure represents the meridian, the solid line represents the sagittal, and the corresponding light wavelength is 587.6nm.

Figure 52 is an axial chromatic aberration curve of the zoom lens in Example 6 when it is at the telephoto end. The wavelength of light corresponding to the dotted line in the figure is 656.3nm, the wavelength of light corresponding to the solid line is 587.6nm, and the wavelength of light corresponding to the dotted line is 486.1nm.

Figure 53 is a distortion curve of the zoom lens in Example 6 when it is at the telephoto end. The corresponding light wavelength in the figure is 587.6nm.

It can be seen from Figures 48 to 53 that the zoom lens provided in Embodiment 6 has good imaging quality at both the wide-angle end and the telephoto end.

The above is the content of the first part. The second part will be introduced in detail with reference to the accompanying drawings.

Part 2 (corresponding to Figure 54 to Figure 83)

Please refer to Figures 54 to 56. This application provides an electronic device 100. The electronic device 100 includes a device body 1 and a camera module 2. The device body 1 has an opening K14, and the camera module 2 is arranged in the device body 1 corresponding to the opening K14. The zoom lens 21 of the camera module 2 can at least partially extend or retract the device body 1 through the opening K14. When the user needs to take pictures, the zoom lens 21 can be controlled to extend from the device body 1 through the opening K14 (as shown in Figure 55). When the user does not need to take pictures, the zoom lens 21 can be controlled to retract into the device body 1 through the opening K14 (as shown in Figure 54).

The device body 1 refers to the main part of the electronic device 100. The main part includes electronic components that realize the main functions of the electronic device 100 and a housing that protects and carries these electronic components. The device body 1 may include a display screen 11, a middle frame 12, and a back cover 13 (as shown in Figure 56). The display screen 11 and the back cover 13 are both connected to the middle frame 12 and are arranged on opposite sides of the middle frame 12. And the sides of the middle frame 12 are exposed outside the back cover 13 and the display screen 11 .

It should be noted that, according to actual needs, the camera module 2 can be disposed on any side of the electronic device 100, which is not limited in this application. Taking a mobile phone as an example, the camera module 2 can be installed on the front, back, or side of the mobile phone. The so-called front refers to the side of the mobile phone with the display screen 11; the so-called back refers to the side of the mobile phone with the back cover 13 (as shown in FIG. 56); and the so-called side refers to the circumferential side of the middle frame 12 of the mobile phone. It can be understood that, depending on the type of electronic device 100 , the definitions of the front, back, side, etc. may be different, and other types of electronic devices 100 will not be described in detail here.

Further, the opening K14 may be opened on the back cover 13 (as shown in Figure 56). In other embodiments, the opening K14 may also be provided on the display screen 11 ; or, the opening K14 may be provided on the middle frame 12 . When the back cover 13 has the opening K14, the camera module 2 is a rear camera. When the opening K14 is provided on the display screen 11, the camera module is a front camera. It can be understood that the introduction of the device body 1 in this embodiment is only an introduction to an application scenario of the camera module 2 and should not be understood as a limitation of the electronic device 100 provided in this application.

Please refer to Figure 57. This application also provides a camera module 2. The camera module 2 includes a filter 22, a photosensitive element 23 and a zoom lens 21 described in any of the following embodiments. The zoom lens 21, the filter 22, and the photosensitive element 23 are arranged in sequence along the optical axis X direction. When shooting, the external light passes through the zoom lens 21 and the filter 22 in sequence, and finally reaches the photosensitive element 23 . The first lens group G1 and the second lens group G2 of the zoom lens 21 can move relative to the photosensitive element 23 along the optical axis X direction.

Referring to Figure 57, the present application also provides a zoom lens 21. The zoom lens 21 includes: a first lens group G1 and a second lens group G2 arranged along the object side to the image side. The object side and the image side respectively refer to: taking the zoom lens 21 as a boundary, the side where the subject is located is the object side, and the side where the image formed by the subject is located is the image side. Therefore, when shooting, light first passes through the first lens group G1 closer to the object side, and then passes through the second lens group G2 closer to the image side.

The first lens group G1 has positive optical power. The second lens group G2 has negative refractive power. Wherein, the optical power (focal power) represents the ability of the optical system (lens or lens group) to deflect light. Generally speaking, optical power is also the reciprocal of the image-side focal length. The optical power of an optical system is positive, which means it has a converging effect on light. The power of an optical system is negative, which means it diffuses light.

Optionally, the lens on the most image side of the first lens group G1 has positive refractive power. Such an arrangement allows the zoom lens 21 to provide better imaging effects. The so-called lens on the most image side refers to the lens closest to the image side in the first lens group G1.

Referring to Figure 58, the zoom lens 21 has a telephoto end and a wide-angle end. Both the first lens group G1 and the second lens group G2 can move along the optical axis X direction to zoom switch between the telephoto end and the wide-angle end. The telephoto end refers to the state when the focal length of the zoom lens 21 is maximum, and the telephoto end can also be called the telephoto state. The wide-angle end refers to the state when the focal length of the zoom lens 21 is the smallest, and the wide-angle end can also be called the wide-angle state. The positions of the first lens group G1 and the second lens group G2 when the zoom lens 21 is at the telephoto end are different from the positions of the first lens group G1 and the second lens group G2 when the zoom lens 21 is at the wide-angle end. Therefore, the telephoto end and the wide-angle end are two different shooting states of the zoom lens 21 , where the telephoto end is used for telephoto shooting and the wide-angle end is used for wide-angle shooting.

Optionally, the telephoto end of the zoom lens 21 satisfies the relationship: 1.8<TTLt/ImgH<3.6. Wherein, TTLt is the total optical length of the zoom lens 21 when it is at the telephoto end. ImgH is the image height, which refers to half of the diagonal length of the effective pixel area of the imaging plane S231. It should be noted that the total optical length refers to the distance from the surface of the first lens group G1 closest to the object side to the imaging surface S231. Please refer to here for the following description of the total optical length.

The TTLt/ImgH may be, but is not limited to, 1.9, 2.0, 2.1, 2.2, 2.3, 2.33, 2.5, 2.7, 2.8, 2.81, 2.9, 3.0, 3.2, 3.3, etc. For example, TTLt is 16.518mm and ImgH is 6.450mm; or TTLt is 17.873mm and ImgH is 6.450mm; or TTLt is 15.268mm and ImgH is 6.450mm.

Please refer to FIG. 57 . The zoom lens 21 also has a retracted state. When the zoom lens 21 is in the retracted state, the relational expressions are satisfied: cTTL<TTLw and cTTL<TTLt. Wherein, cTTL is the total optical length when the zoom lens 21 is in the retracted state, and TTLw is the total optical length when the zoom lens 21 is at the wide-angle end. TTLt is the total optical length of the zoom lens 21 when it is at the telephoto end. In other words, among the above three states, the total optical length cTTL when the zoom lens 21 is in the retracted state is the shortest, which is smaller than the total optical length corresponding to the telephoto end and the wide-angle end. Therefore, cTTL is the minimum total length of the zoom lens 21 . Therefore, when the user needs to take pictures, the user can control the zoom lens 21 to extend to switch to the wide-angle end or the telephoto end. When the user does not need to take pictures, the user can control the zoom lens 21 to shorten to switch to the contracted state. With reference to the electronic device 100 provided in the previous embodiment, when the zoom lens 21 is extended to switch to the wide-angle end or the telephoto end, it extends out of the electronic device 100 through the opening K14; when the zoom lens 21 is shortened to switch to the wide-angle end or the telephoto end, In the retracted state, the zoom lens 21 is retracted into the electronic device 100 .

Furthermore, the zoom lens 21 satisfies: cTTL<TTLw<TTLt; that is to say, the total optical length TTLt when the zoom lens 21 is at the telephoto end is greater than the total optical length TTLw when the zoom lens 21 is at the wide-angle end, so TTLt is the zoom lens 21 the maximum total length. From a zoom perspective, when the zoom lens 21 switches from the retracted state to the wide-angle end, the first lens group G1 moves toward the object side along the optical axis X (please refer to Figures 57 and 58 ). During the zooming process of the zoom lens 21 from the wide-angle end to the telephoto end, the first lens group G1 moves toward the object side along the optical axis X, and the second lens group G2 moves toward the object side along the optical axis X. Move sideways (please refer to Figure 58). It should be noted that when the zoom lens 21 switches from the retracted state to the wide-angle end, the second lens group G2 may not move, or may move toward the object side along the optical axis X.

Optionally, the contracted state of the zoom lens 21 satisfies the relationship: 1<cTTL/ImgH<2. Wherein, cTTL is the total optical length of the zoom lens 21 when it is in the contracted state, and ImgH is the image height.

Among them, cTTL/ImgH can be, but is not limited to, 1.1, 1.2, 1.24, 1.3, 1.4, 1.5, 1.55, 1.6, 1.7, 1.8, 1.9, etc. For example, cTTL is 9mm and ImgH is 6.45mm; or cTTL is 10mm and ImgH is 6.45mm; or cTTL is 8.5mm and ImgH is 6.45mm.

It can be seen from the data exemplified above that when the value of ImgH is 6.45mm, TTLt is about 20mm and cTTL is about 10mm. Therefore, the zoom lens 21 provided by the present application can be applied to electronic devices 100 with thinning and lightness requirements, such as cell phone. This allows the zoom lens 21 to not only be miniaturized, but also effectively maintain good optical performance.

Optionally, when the zoom lens 21 is at the wide-angle end, the first lens group G1 is at least partially located outside the device body 1 .

Optionally, when the zoom lens 21 is at the wide-angle end, the second lens group G2 is at least partially located within the device body 1 .

Optionally, when the zoom lens 21 is at the telephoto end, the first lens group G1 is located outside the device body 1 , and the second lens group G2 is at least partially located outside the device body 1 .

Please refer to FIG. 57 , the zoom lens 21 further includes an aperture 211 . The diaphragm 211 is disposed on the object side of the first lens group G1 or inside the first lens group G1 or on the image side of the first lens group G1 . During the zooming process of the zoom lens 21, the diaphragm 211 moves along with the first lens group G1. In other words, the diaphragm 211 may be disposed on the object side or the image side of the first lens group G1 , or may be disposed between two adjacent lenses constituting the first lens group G1 . The diaphragm 211 is relatively fixed to the first lens group G1. During the zooming process, the diaphragm 211 moves together with the first lens group G1. Since the arrangement of the lenses in the first lens group G1 is relatively sparse, while the arrangement of the lenses in the second lens group G2 is relatively dense, therefore, the diaphragm 211 can be fixed to the first lens group G1 for reasonable use. space, and the radial size of each lens in the first lens group G1 is smaller, so the diaphragm 211 is easier to be fixed with the first lens group G1.

Optionally, please refer to FIG. 59 . The zoom lens 21 further includes a third lens group G3 . The third lens group G3 is fixedly disposed on the image side of the second lens group G2 . The third lens group G3 is used to correct the chief ray incident angle (Chief Ray Angle, CRA) at the wide-angle end and telephoto end. CRA is a parameter of the Sensor, and the light needs to be incident on the Sensor at the required angle. For the zoom lens 21, the CRA at the wide-angle end and the telephoto end needs to be consistent. Therefore, the third lens group G3 is used to ensure that the zoom lens 21 has better imaging quality.

Optionally, the total number of lenses in the first lens group G1 is 3-5, that is, 3, 4, or 5 lenses.

Optionally, the total number of lenses in the second lens group G2 is 2-4, that is, 2, 3, or 4.

Optionally, when the zoom lens 21 includes the third lens group G3, the total number of lenses in the third lens group G3 is 1-2, that is, 1 or 2.

Optionally, please refer to FIG. 60 . The number of critical points Q of at least one lens in the zoom lens 21 is greater than or equal to 2. In other words, the zoom lens 21 includes at least one lens with two critical points Q or above. The critical point Q refers to the tangent point on the lens surface that is tangent to a tangent plane perpendicular to the optical axis X, in addition to the intersection point with the optical axis X. When a lens has two or more critical points Q, the shape change of the lens in the radial direction will be relatively gentle, which can prevent the lens from being too thick and reduce the space occupied by the lens in the direction from the object side to the image side. space, so that the zoom lens 21 can be miniaturized, which is more conducive to application in electronic devices 100 that require thinness and lightness.

Optionally, please refer to FIG. 61 . The zoom lens 21 further includes a first bearing member 212 and a second bearing member 213 . The first bearing member 212 can be sleeved on the outer periphery of the second bearing member 213 . Both the first bearing member 212 and the second bearing member 213 can move relatively along the optical axis X direction. The first lens group G1 is fixed in the first carrier 212 . The first carrying member 212 is used to drive the first lens group G1 to move along the optical axis X relative to the photosensitive element 23 . The second lens group G2 is fixed in the second bearing member 213 . The second bearing member 213 is used to drive the second lens group G2 to move along the optical axis X relative to the photosensitive element 23 . The first bearing member 212 may be disposed in the opening K14 of the electronic device 100, and the first bearing member 212 and the second bearing member 213 may extend or retract the electronic device 100 through the opening K14. Of course, the first lens group G1 and the second lens group G2 can be carried in other ways. The structure shown in FIG. 61 is only an illustration and should not be regarded as a limitation of the present application.

Optionally, the zoom lens 21 satisfies the relationship: 1<fw/ImgH<1.7. Where, fw is the wide-angle end focal length.

fw/ImgH can be, but is not limited to, 1.1, 1.2, 1.3, 1.32, 1.4, 1.5, 1.6, etc. For example, fw is 9.2607mm and ImgH is 6.45mm; or fw is 9mm and ImgH is 6.45mm; or fw is 8.2mm and ImgH is 6.45mm.

Optionally, the zoom lens 21 satisfies the relationship: -1<f1/f2<-0.5. Wherein, f1 is the focal length of the first lens group G1, and f2 is the focal length of the second lens group G2.

f1/f2 can be, but is not limited to, -0.9, -0.8, -0.82, -0.7, -0.76, -0.6, -0.61, etc. For example, f1 is 8.227mm and f2 is -10.971mm; or f1 is 6.674mm and f2 is -8.551mm; or f1 is 7.071mm and f2 is -8.976mm.

In this embodiment, the ratio of the focal length f1 of the first lens group G1 to the focal length f2 of the second lens group G2 is set to be greater than -1 and less than -0.5, so that the first lens group G1 and the second lens group G2 can be reasonably allocated The optical power relationship enables better focusing and zooming.

Optionally, the zoom lens 21 satisfies the relationship: 0.15<Δd/TTLt<0.5. Wherein, Δd is the distance that the first lens group G1 moves during the zooming process of the zoom lens 21 from the wide-angle end to the telephoto end; TTLt is the distance when the zoom lens 21 is at the telephoto end. total optical length. Δd/TTLt may be, but is not limited to, 0.16, 0.17, 0.19, 0.2, 0.21, 0.26, 0.3, 0.32, 0.4, 0.45, etc. For example, Δd is 3.640mm and TTLt is 16.518mm; or Δd is 5.347mm and TTLt is 17.873mm; or Δd is 3.648mm and TTLt is 15.268mm.

In this embodiment, the ratio of the moving distance of the first lens group G1 from the wide-angle end to the telephoto end and the maximum total optical length of the zoom lens 21 is reasonably set between 0.15 and 0.5, so that a smaller lens group can be used. The interval variation achieves a larger zoom ratio, which is beneficial to compressing the total length of the zoom lens 21 .

Optionally, the zoom lens 21 satisfies the relationship: 1.5<tan(hFOVw)/tan(hFOVt). Wherein, hFOVw is the half-viewing angle when the zoom lens 21 is at the wide-angle end, and hFOVt is the half-viewing angle when the zoom lens 21 is at the telephoto end. Wherein, the half picture angle refers to half of the field of view (Field of Vision, FOV).

tan(hFOVw)/tan(hFOVt) may be, but is not limited to, 1.6, 1.71, 1.8, 1.9, 2.0, 2.1, 2.2, 2.25, etc. For example, hFOVw is 42.005° and hFOVt is 23.218°; or hFOVw is 34.821° and hFOVt is 22.486°; or hFOVw is 41.672° and hFOVt is 25.120°.

Optionally, the zoom lens 21 satisfies the relationship: fw/ENPw<2.4. Wherein, fw is the focal length of the wide-angle end, and ENPw is the entrance pupil diameter when the zoom lens 21 is at the wide-angle end.

fw/ENPw can be but is not limited to 2.3, 2.26, 2.2, 2.18, 2.1, 2.0, 1.98, 1.9, 1.8, etc. For example, fw is 9.2607mm, ENPw is 4.677mm; or fw is 9mm, ENPw is 4.091mm; or fw is 8.2mm, ENPw is 4.141mm.

In this embodiment, by setting the ratio of the focal length of the wide-angle end to the entrance pupil diameter of the wide-angle end to less than 2.4, the aperture of the wide-angle end is less than 2.4, thereby improving the brightness and blur effect of the lens. Among them, as the brightness of the lens increases, more light enters the lens, which means that clear images can be captured at night.

Optionally, for any of the above embodiments, the total number of lenses N in the zoom lens 21 satisfies: 5≤N≤10. The total number of lenses N may be 5, or 6, or 7, or 8, or 9, or 10. For example, the total number of lenses in the first lens group G1 is 4, the total number of lenses in the second lens L2 is 3, and the total number of lenses in the third lens group G3 is 0. Alternatively, the total number of lenses in the first lens group G1 is four, the total number of lenses in the second lens L2 is three, and the total number of lenses in the third lens group G3 is one.

Using the zoom lens 21 provided by this application, the maximum total optical length TTLt of the zoom lens 21 can be controlled below 26 mm (for example, 20 mm). The minimum total optical length cTTL of the zoom lens 21 can be controlled below 11 mm (for example, 10 mm). The field of view at the wide-angle end can be achieved below 90 degrees. The field of view angle at the telephoto end can be less than 50 degrees. Therefore, the zoom lens 21 provided by the present application can not only be well adapted to the electronic device 100 that requires thinness and lightness, but also has good shooting performance.

Example 1

Please refer to FIGS. 57 and 58 , wherein FIG. 58(a) is a schematic diagram of the zoom lens shown in FIG. 57 at the wide-angle end. FIG. 58(b) is a schematic diagram of the zoom lens shown in FIG. 57 at the telephoto end. The zoom lens 21 provided in this embodiment includes: a first lens group G1 and a second lens group G2 arranged along the object side to the image side. The first lens group G1 is a lens group with positive refractive power, and the second lens group G2 is a lens group with negative refractive power. Among them, the first lens group G1 includes a first lens L1, a second lens L2, a third lens L3, and a fourth lens L4 arranged along the object side to the image side. The second lens group G2 includes a fifth lens L5, a sixth lens L6, and a seventh lens L7 arranged from the object side to the image side. The zoom lens 21 further includes an aperture 211 disposed between the third lens L3 and the fourth lens L4.

For specific data on the zoom lens provided in Embodiment 1, please refer to Table 31 to Table 35.

Table 31 shows the relevant parameters of each lens, aperture, and filter of the zoom lens in Embodiment 1, including the radius of curvature R, the interval d, the refractive index Nd, and the Abbe coefficient Vd. Among them, the units of the radius of curvature R and the interval d are both millimeters (mm). In Table 31, surface numbers 1-19 mark the surface of the subject, each lens, diaphragm, filter, and imaging surface in sequence along the direction from the object side to the image side. Among them, the photographed object is marked as OBJ, the aperture is marked as STO, and the imaging surface is marked as IMA.

It should be noted that the interval d represents the distance d between the current surface and the subsequent surface along the optical axis. For example, the distance between surface 2 and surface 3 in Table 31 is 0.465, and the distance between surface 3 and surface 4 is 0.729. Please refer to here for information about interval d later.

Table 32 shows the variable interval d when the zoom lens changes from the wide-angle end to the telephoto end in Embodiment 1, that is, the corresponding variable interval d when the zoom lens is at the wide-angle end and the telephoto end.

Table 33 shows the k value and aspheric coefficient of the aspheric mirror surface of each lens in Example 1. Table 33 includes Table 33a, Table 33b, Table 33c, and Table 33d.

Table 34 shows the overall parameter data of the zoom lens in Example 1.

Table 35 shows the conditional expressions and corresponding data of the zoom lens in Example 1. N in the table below is the number of lenses.

In this embodiment, by changing the distance d1 between the first lens group G1 and the second lens group G2 along the optical axis separation distance), and the separation d2 between the second lens group G2 and the filter 22 along the optical axis X (that is, the separation distance along the optical axis X from the image side of the seventh lens L7 to the object side of the filter 22) To realize the switching between 21 groups of zoom lenses between telephoto end, wide-angle end and contracted state.

Please refer to FIGS. 62 to 64 , which show relevant graphs at the wide-angle end of the zoom lens.

Figure 62 is an astigmatism curve when the zoom lens in Example 1 is at the wide-angle end. The dotted line in the figure represents the meridian, the solid line represents the sagittal, and the corresponding light wavelength is 587.6nm.

Figure 63 is an axial chromatic aberration curve of the zoom lens in Example 1 when it is at the wide-angle end. The wavelength of light corresponding to the dotted line in the figure is 656.3nm, the wavelength of light corresponding to the solid line is 587.6nm, and the wavelength of light corresponding to the dotted line is 486.1nm.

Figure 64 is a distortion curve of the zoom lens in Example 1 when it is at the wide-angle end. The corresponding light wavelength in the figure is 587.6nm.

Please refer to FIGS. 65 to 67 , which show relevant graphs at the telephoto end of the zoom lens.

Figure 65 is an astigmatism curve when the zoom lens in Example 1 is at the telephoto end. The dotted line in the figure represents the meridian, the solid line represents the sagittal, and the corresponding light wavelength is 587.6nm.

Figure 66 is an axial chromatic aberration curve of the zoom lens in Example 1 when it is at the telephoto end. The wavelength of light corresponding to the dotted line in the figure is 656.3nm, the wavelength of light corresponding to the solid line is 587.6nm, and the wavelength of light corresponding to the dotted line is 486.1nm.

Figure 67 is a distortion curve of the zoom lens in Example 1 when it is at the telephoto end. The corresponding light wavelength in the figure is 587.6nm.

It can be seen from Figures 62 to 67 that the zoom lens provided in Embodiment 1 has good imaging quality at both the wide-angle end and the telephoto end.

Example 2

Please refer to FIGS. 68 and 69 , wherein FIG. 69(a) is a schematic diagram of the zoom lens shown in FIG. 68 at the wide-angle end. FIG. 69(b) is a schematic diagram of the zoom lens shown in FIG. 68 at the telephoto end. The zoom lens 21 provided in this embodiment includes: a first lens group G1, a second lens group G2, and a third lens group G3 arranged along the object side to the image side. The first lens group G1 is a lens group with positive refractive power, and the second lens group G2 is a lens group with negative refractive power. Among them, the first lens group G1 includes a first lens L1, a second lens L2, a third lens L3, and a fourth lens L4 arranged along the object side to the image side. The second lens group G2 includes a fifth lens L5, a sixth lens L6, and a seventh lens L7 arranged from the object side to the image side. The third lens group G3 includes an eighth lens L8. The zoom lens 21 further includes an aperture 211 disposed between the third lens L3 and the fourth lens L4.

For specific data on the zoom lens provided in Embodiment 2, please refer to Table 36 to Table 40.

Table 36 shows the relevant parameters of each lens, aperture, and filter of the zoom lens in Embodiment 2, including the radius of curvature R, the interval d, the refractive index Nd, and the Abbe coefficient Vd. Among them, the units of the radius of curvature R and the interval d are both millimeters (mm). In Table 36, surface numbers 1-21 are along the direction from the object side to the image side, marking the surface of the subject, each lens, diaphragm, filter and imaging surface in order. Among them, the photographed object is marked as OBJ, the aperture is marked as STO, and the imaging surface is marked as IMA.

Table 37 shows the variable interval d when the zoom lens changes from the wide-angle end to the telephoto end in Example 2, that is, the corresponding variable interval d when the zoom lens is at the wide-angle end and the telephoto end.

Table 38 shows the k value and aspheric coefficient of the aspheric mirror surface of each lens in Example 2. Table 38 includes Table 38a, Table 38b, Table 38c, and Table 38d.

Table 39 shows the overall parameter data of the zoom lens in Example 2.

Table 40 shows the conditional expressions and corresponding data of the zoom lens in Example 2. N in the table below is the number of lenses.

In this embodiment, by changing the distance d1 between the first lens group G1 and the second lens group G2 along the optical axis separation distance), and the separation d2 of the second lens group G2 and the third lens group G3 along the optical axis X (that is, the separation distance along the optical axis X from the image side of the seventh lens L7 to the object side of the eighth lens L8 ) to realize the switching between the telephoto end, wide-angle end and contracted state of the 21 groups of zoom lenses.

Please refer to FIGS. 70 to 72 , which show relevant graphs at the wide-angle end of the zoom lens.

Figure 70 is an astigmatism curve when the zoom lens in Example 2 is at the wide-angle end. The dotted line in the figure represents the meridian, the solid line represents the sagittal, and the corresponding light wavelength is 587.6nm.

Figure 71 is the axial chromatic aberration curve of the zoom lens in Example 2 when it is at the wide-angle end. The wavelength of light corresponding to the dotted line in the figure is 656.3nm, the wavelength of light corresponding to the solid line is 587.6nm, and the wavelength of light corresponding to the dotted line is 486.1nm.

Figure 72 is a distortion curve of the zoom lens in Example 2 when it is at the wide-angle end. The corresponding light wavelength in the figure is 587.6nm.

Please refer to FIGS. 73 to 75 , which show relevant graphs at the telephoto end of the zoom lens.

Figure 73 is an astigmatism curve when the zoom lens in Example 2 is at the telephoto end. The dotted line in the figure represents the meridian, the solid line represents the sagittal, and the corresponding light wavelength is 587.6nm.

Figure 74 is an axial chromatic aberration curve of the zoom lens in Example 2 when it is at the telephoto end. In the figure, the wavelength of light corresponding to the dotted line is 656.3nm, the wavelength of light corresponding to the solid line is 587.6nm, and the wavelength of light corresponding to the dotted line is 486.1nm.

Figure 75 is a distortion curve of the zoom lens in Example 2 when it is at the telephoto end. The corresponding light wavelength in the figure is 587.6nm.

It can be seen from Figures 70 to 75 that the zoom lens provided in Embodiment 2 has good imaging quality at both the wide-angle end and the telephoto end.

Example 3

Please refer to FIG. 76 and FIG. 77 , wherein FIG. 77(a) is a schematic diagram of the zoom lens shown in FIG. 76 at the wide-angle end. FIG. 77(b) is a schematic diagram of the zoom lens shown in FIG. 76 at the telephoto end. The zoom lens 21 provided in this embodiment includes: a first lens group G1 and a second lens group G2 arranged along the object side to the image side. The first lens group G1 is a lens group with positive refractive power, and the second lens group G2 is a lens group with negative refractive power. Among them, the first lens group G1 includes a first lens L1, a second lens L2, a third lens L3, and a fourth lens L4 arranged along the object side to the image side. The second lens group G2 includes a fifth lens L5, a sixth lens L6, and a seventh lens L7 arranged from the object side to the image side. The zoom lens 21 further includes an aperture 211 disposed between the third lens L3 and the fourth lens L4.

For specific data on the zoom lens provided in Embodiment 3, please refer to Table 41 to Table 45.

Table 41 shows the relevant parameters of each lens, aperture, and filter of the zoom lens in Embodiment 3, including the radius of curvature R, the interval d, the refractive index Nd, and the Abbe coefficient Vd. Among them, the units of the radius of curvature R and the interval d are both millimeters (mm). In Table 41, surface numbers 1-19 mark the surface of the subject, each lens, diaphragm, filter, and imaging surface in sequence along the direction from the object side to the image side. Among them, the photographed object is marked as OBJ, the aperture is marked as STO, and the imaging surface is marked as IMA.

Table 42 shows the variable interval d when the zoom lens changes from the wide-angle end to the telephoto end in Embodiment 3, that is, the variable interval d corresponding to when the zoom lens is at the wide-angle end and the telephoto end.

Table 43 shows the k value and aspheric coefficient of the aspheric mirror surface of each lens in Example 3. Table 43 includes Table 43a, Table 43b, Table 43c, and Table 43d.

Table 44 shows the overall parameter data of the zoom lens in Example 3.

Table 45 shows the conditional expressions and corresponding data of the zoom lens in Example 3. N in the table below is the number of lenses.

Please refer to FIGS. 78 to 80 , which show relevant graphs at the wide-angle end of the zoom lens.

Figure 78 is an astigmatism curve when the zoom lens in Example 3 is at the wide-angle end. The dotted line in the figure represents the meridian, the solid line represents the sagittal, and the corresponding light wavelength is 587.6nm.

Figure 79 is an on-axis chromatic aberration curve of the zoom lens in Example 3 when it is at the wide-angle end. The wavelength of light corresponding to the dotted line in the figure is 656.3nm, the wavelength of light corresponding to the solid line is 587.6nm, and the wavelength of light corresponding to the dotted line is 486.1nm.

Figure 80 is a distortion curve of the zoom lens in Example 3 when it is at the wide-angle end. The corresponding light wavelength in the figure is 587.6nm.

Please refer to FIGS. 81 to 83 , which show relevant graphs at the telephoto end of the zoom lens.

Figure 81 is an astigmatism curve when the zoom lens in Example 3 is at the telephoto end. The dotted line in the figure represents the meridian, the solid line represents the sagittal, and the corresponding light wavelength is 587.6nm.

Figure 82 is an axial chromatic aberration curve of the zoom lens in Example 3 when it is at the telephoto end. The wavelength of light corresponding to the dotted line in the figure is 656.3nm, the wavelength of light corresponding to the solid line is 587.6nm, and the wavelength of light corresponding to the dotted line is 486.1nm.

Figure 83 is a distortion curve of the zoom lens in Example 3 when it is at the telephoto end. The corresponding light wavelength in the figure is 587.6nm.

It can be seen from Figures 78 to 83 that the zoom lens provided in Embodiment 3 has good imaging quality at both the wide-angle end and the telephoto end.

Although the embodiments of the present application have been shown and described above, it can be understood that the above-mentioned embodiments are illustrative and cannot be understood as limitations of the present application. Those of ordinary skill in the art can make modifications to the above-mentioned embodiments within the scope of the present application. The embodiments are subject to changes, modifications, substitutions and modifications, and these improvements and modifications are also deemed to be within the protection scope of the present application.

Claims

A zoom lens, characterized in that the zoom lens includes: a first lens group and a second lens group arranged along the object side to the image side; the first lens group has negative refractive power, and the second lens The zoom lens has a telephoto end and a wide-angle end, and both the first lens group and the second lens group can move along the optical axis direction to adjust the zoom lens at the telephoto end and the wide-angle end. Zoom switching between ends; the number of critical points of at least one lens in the zoom lens is greater than or equal to 2; the wide-angle end of the zoom lens satisfies the relationship: 2.5＜TTLw/ImgH＜4; where, TTLw is the zoom The total optical length of the lens when it is at the wide-angle end, and ImgH is the image height.
The zoom lens according to claim 1, wherein the zoom lens also has a contracted state, and when the zoom lens is in the contracted state, it satisfies the relationship: cTTL<TTLw and cTTL<TTLt, where cTTL is The total optical length of the zoom lens when it is in the retracted state, TTLt is the total optical length of the zoom lens when it is at the telephoto end.
The zoom lens according to claim 2, wherein the contracted state of the zoom lens satisfies the relationship: 1<cTTL/ImgH<2.
The zoom lens according to claim 2, wherein when the zoom lens switches from the retracted state to the telephoto end, the first lens group and the second lens group move along the optical axis. Move toward the object side.
The zoom lens according to claim 1, wherein during the zooming process of the zoom lens from the wide-angle end to the telephoto end, the first lens group moves toward the image side along the optical axis, and the The second lens group moves toward the object side along the optical axis.
The zoom lens according to claim 1, wherein the zoom lens further includes an aperture, the aperture is disposed on the object side of the second lens group or inside the second lens group, and the aperture is During the zooming process of the zoom lens, the diaphragm and the second lens group move synchronously.
The zoom lens of claim 1, further comprising a third lens group with negative refractive power, and the third lens group is fixedly disposed on the image side of the second lens group.
The zoom lens of claim 7, wherein the total number of lenses in the third lens group is 1-2.
The zoom lens according to any one of claims 1 to 8, wherein the total number of lenses in the first lens group is 2-3; and/or the total number of lenses in the second lens group is 3-5 pieces.
The zoom lens according to any one of claims 1 to 8, wherein the zoom lens satisfies the relationship: 1<fw/ImgH<1.7, where fw is the wide-angle end focal length.
The zoom lens according to any one of claims 1 to 8, characterized in that the zoom lens satisfies the relationship: -3<f1/f2<-1.2, where f1 is the focal length of the first lens group, f2 is the focal length of the second lens group.
The zoom lens according to any one of claims 1 to 8, characterized in that the zoom lens satisfies the relationship: 0.05<Δd/TTLw<0.25, where Δd is the distance from the wide-angle end to the The distance that the second lens group moves during the zooming process at the telephoto end.
The zoom lens according to any one of claims 1 to 8, characterized in that the zoom lens satisfies the relationship: 1.5<tan(hFOVw)/tan(hFOVt), where hFOVw means that the zoom lens is at the wide-angle end hFOVt is the half-frame angle when the zoom lens is at the telephoto end.
The zoom lens according to any one of claims 1 to 8, wherein the zoom lens satisfies the relationship ft/ENPt<3, where ft is the focal length of the telephoto end and ENPt is the zoom lens The entrance pupil diameter at the telephoto end.
The zoom lens according to any one of claims 1 to 8, wherein the object-side lens of the first lens group has negative refractive power, and/or the object-side lens of the second lens group The lens has positive power.
The zoom lens according to any one of claims 1 to 8, characterized in that the total number of lenses N in the zoom lens satisfies: 5≤N≤10.
A zoom lens, characterized in that the zoom lens includes: a first lens group and a second lens group arranged along the object side to the image side; the first lens group has positive optical power, and the second lens group It has negative optical power; the zoom lens has a telephoto end and a wide-angle end, and both the first lens group and the second lens group can move along the optical axis direction to adjust the zoom lens at the telephoto end and the wide-angle end. Zoom switching between ends; the number of critical points of at least one lens in the zoom lens is greater than or equal to 2; the telephoto end of the zoom lens satisfies the relationship: 1.8＜TTLt/ImgH＜3.6; where, TTLt is the The total optical length of the zoom lens when it is at the telephoto end, ImgH is the image height.
The zoom lens according to claim 1, wherein the zoom lens also has a contracted state, and when the zoom lens is in the contracted state, it satisfies the relationship: cTTL<TTLw and cTTL<TTLt, where cTTL is The total optical length of the zoom lens when it is in the contracted state, TTLw is the total optical length of the zoom lens when it is at the wide-angle end.
The zoom lens according to claim 18, wherein the contracted state of the zoom lens satisfies the relationship: 1<cTTL/ImgH<2.
The zoom lens of claim 18, wherein when the zoom lens switches from the retracted state to the wide-angle end, the first lens group moves toward the object side along the optical axis.
The zoom lens according to claim 17, wherein during the zooming process of the zoom lens from the wide-angle end to the telephoto end, the first lens group moves toward the object side along the optical axis, and the The second lens group moves toward the object side along the optical axis.
The zoom lens according to claim 17, characterized in that the zoom lens further includes an aperture, the aperture is disposed on the object side of the first lens group or inside the first lens group or the On the image side of the first lens group, during the zooming process of the zoom lens, the diaphragm moves with the first lens group.
The zoom lens according to claim 17, wherein the zoom lens further includes a third lens group, and the third lens group is fixedly disposed on the image side of the second lens group.
The zoom lens of claim 23, wherein the total number of lenses in the third lens group is 1-2.
The zoom lens according to any one of claims 17 to 24, wherein the total number of lenses in the first lens group is 3-5; and/or the total number of lenses in the second lens group is 2-4 pieces.
The zoom lens according to any one of claims 17 to 24, wherein the zoom lens satisfies the relationship: 1<fw/ImgH<1.7, where fw is the wide-angle end focal length.
The zoom lens according to any one of claims 17 to 24, characterized in that the zoom lens satisfies the relationship: -1<f1/f2<-0.5, where f1 is the focal length of the first lens group, f2 is the focal length of the second lens group.
The zoom lens according to any one of claims 17 to 24, characterized in that the zoom lens satisfies the relationship: 0.15＜Δd/TTLt＜0.5, where Δd is the position of the zoom lens from the wide-angle end to The distance that the first lens group moves during the zooming process at the telephoto end.
The zoom lens according to any one of claims 17 to 24, characterized in that the zoom lens satisfies the relationship: 1.5<tan(hFOVw)/tan(hFOVt), where hFOVw means that the zoom lens is at the wide-angle end hFOVt is the half-frame angle when the zoom lens is at the telephoto end.
The zoom lens according to any one of claims 17 to 24, characterized in that the zoom lens satisfies the relationship: fw/ENPw<2.4, where fw is the focal length of the wide-angle end and ENPw is the focal length of the zoom lens at the wide-angle end. The entrance pupil diameter at the wide-angle end.
The zoom lens according to any one of claims 17 to 24, wherein the lens on the most image side of the first lens group has positive refractive power.
The zoom lens according to any one of claims 17 to 24, wherein the total number of lenses N in the zoom lens satisfies: 5≤N≤10.
A camera module, characterized in that the camera module includes a photosensitive element and a zoom lens according to any one of claims 1 to 32, and the zoom lens can move relative to the photosensitive element along the optical axis direction.
An electronic device, characterized in that the electronic device includes a device body and a camera module as claimed in claim 33, the device body has an opening, and the camera module is disposed on the device body corresponding to the opening. Inside, at least part of the zoom lens of the camera module can extend or retract the device body through the opening.