WO2022267574A1

WO2022267574A1 - Zoom lens, zoom camera, and electronic device

Info

Publication number: WO2022267574A1
Application number: PCT/CN2022/081724
Authority: WO
Inventors: 张海洋; 张德伦; 毛明岳; 孙颖; 罗水针; 谢勇
Original assignee: 华为技术有限公司
Priority date: 2021-06-23
Filing date: 2022-03-18
Publication date: 2022-12-29
Also published as: CN115514862A

Abstract

The present application provides a zoom lens, a zoom camera, and an electronic device. The zoom lens comprises a first fixed lens unit, a second fixed lens unit, a zoom lens unit, and a drive assembly. The first fixed lens unit and the second fixed lens unit are relatively fixed. The zoom lens unit is movably disposed between the first fixed lens unit and the second fixed lens unit. The optical axis of the zoom lens unit, the optical axis of the first fixed lens unit, and the optical axis of the second fixed lens unit coincide. There are at least two zoom spots between the first fixed lens unit and the second fixed lens unit. The zoom lens unit is connected to the drive assembly, and under the driving of the drive assembly, the zoom lens unit is driven to change in position between the at least two zoom spots. The optical power of the first fixed lens unit and the optical power of the second fixed lens unit are positive, the optical power of the zoom lens unit is negative, and the zoom lens can perform clear imaging when the zoom lens unit is located at the zoom spot. In the solution, the zoom lens has a small total optical length and a small thickness, and thus, the size of the zoom lens can be reduced.

Description

Zoom lens, zoom camera and electronic equipment

Cross References to Related Applications

This application claims the priority of the Chinese patent application with the application number 202110700223.9 and the application name "a zoom optical system" submitted to the China Patent Office on June 23, 2021, the entire contents of which are incorporated in this application by reference; The application claims the priority of the Chinese patent application with the application number 202111068911.4 and the application title "a zoom lens, zoom camera and electronic equipment" submitted to the China Patent Office on September 13, 2021, the entire contents of which are incorporated herein by reference. Applying.

technical field

The present application relates to the technical field of cameras, specifically a zoom lens, a zoom camera and electronic equipment.

Background technique

With the development of technology, cameras have more and more functions, and have been more and more used in different application scenarios in production and life. In various application scenarios, it is usually required that the camera has a zoom function. For example, in a video conferencing system, since the spaces of the conference rooms are different, the video conferencing lens needs to be adapted to conference room scenes of various sizes. In order to adapt to conference room scenes of various sizes, conference cameras need to have a zoom function.

In the prior art, in order to realize the zoom function, the lens is large in size, and it is difficult to realize miniaturization. However, miniaturization is an important requirement in the field of cameras. Miniaturized cameras are more conducive to configuration on terminal devices such as smart screens or mobile phones. .

Contents of the invention

The present application provides a zoom lens, a zoom camera and electronic equipment, so as to reduce the volume of the zoom lens and facilitate the integration of the zoom lens into the electronic equipment.

In a first aspect, the present application provides a zoom lens. The zoom lens includes a first fixed mirror group, a second fixed mirror group, a zoom mirror group and a driving assembly. Wherein, the above-mentioned first fixed mirror group and the second fixed mirror group are fixedly arranged, and the zoom lens group is movably arranged between the first fixed mirror group and the second fixed mirror group. And the above-mentioned first fixed lens group, the second fixed lens group and the zoom lens group are coaxially arranged, that is to say, the optical axis of the above-mentioned first fixed lens group, the optical axis of the second fixed lens group and the optical axis of the zoom lens group overlapping. There are at least two zoom points between the first fixed mirror group and the second fixed mirror group, the zoom mirror group is connected to the driving assembly, and driven by the driving assembly, the zoom mirror group is driven between the at least two zoom points Change position. The optical power of the first fixed lens group and the second fixed lens group is positive, and the optical power of the zoom lens group is negative. When the zoom lens group is located at the zoom point, the zoom lens can clearly image.

Compared with the existing zoom lens that achieves the zoom function through the zoom lens group (zoom) and the focus lens group (focus), this solution can realize zooming only by using the zoom lens group, so the length of the zoom lens is relatively small. In addition, compared with the existing zoom lens that zooms in and out by cutting in and out perpendicular to the optical axis, in this solution, the first fixed mirror group, the second fixed mirror group and the zoom mirror group are coaxially (horizontal axis), so The zoom lens is also less thick. Therefore, the zoom lens provided by this solution is more miniaturized, thus facilitating integration in electronic equipment.

In a possible implementation, the zoom lens includes a zoom lens group, and there are two zoom points between the first fixed lens group and the second fixed lens group. In this embodiment, the zoom lens can achieve two-speed zoom, and only includes one zoom lens group, which is beneficial to reduce the volume of the zoom lens.

In another possible implementation, the zoom lens includes at least two zoom lens groups, and a third fixed lens group is arranged between any adjacent zoom lens groups. In this solution, more zoom points can be provided between the first fixed mirror group and the second fixed mirror group, so that multi-stage zooming can be realized.

In a specific technical solution, when the zoom lens includes at least two zoom lens groups, the positions of any two zoom lens groups among the at least two zoom lens groups are relatively fixed. In other words, all the zoom lens groups are relatively fixedly connected into one body. Then, driven by the driving component, all the zoom lens groups move simultaneously, and the relative positions between any two zoom lens groups remain fixed.

When the zoom lens group includes at least two zoom lens groups, all the zoom lens groups may be fixedly connected by a fixing member. Furthermore, the fixing member is used to connect with the drive assembly, and the connection structure can be set relatively simply, which is beneficial to make the drive assembly drive all the zoom lens groups to move synchronously.

The number of lenses included in each lens group is not limited, and each lens group may include at least one lens, for example, may include one lens, or may include at least two lenses. In addition, the number of lenses included in the above lens groups may be the same or different, which is not limited in this application. For example, the above-mentioned first fixed lens group may include one lens, or may include at least two lenses. The above-mentioned second fixed lens group may include one lens, or may include at least two lenses. The above-mentioned zoom lens group may include one lens, or may include at least two lenses. The above-mentioned third fixed lens group may include one lens, or may include at least two lenses.

The specific structure of the above driving assembly is not limited, for example, it may include a motor, a guide rod and a guide block. The motor is connected to the guide rod, the guide block is fixedly connected to the zoom lens group, and the guide block is connected to the guide rod through transmission. Therefore, the motor can be used to drive the zoom lens group to move to the zoom point.

The specific structures of the guide rod and the guide block are not limited. In a specific technical solution, the guide rod has a first thread, and the guide block has a second thread. The first thread and the second thread are adapted so that the guide rod can drive the guide block to move.

In another specific technical solution, the above-mentioned guide rod is a rack, and the guide block is a gear. The above-mentioned rack is adapted to the gear, and the gear can be driven to move on the rack.

The driving assembly may further include a voice coil motor, and the voice coil motor includes a magnet, a coil and an elastic member. The above-mentioned magnet is connected with the zoom lens group, and the elastic member is connected between the magnet and the fixed part, that is to say, one end of the elastic member is connected with the magnet, and the other end is fixedly arranged. The above-mentioned coil is arranged opposite to the magnet. Specifically, when the coil is energized, an electromagnetic field can be generated, and the coil can drive the magnet to move through the electromagnetic field, and the magnet drives the zoom lens group to move to the zoom point.

In another technical solution, the above-mentioned drive assembly may also include an ultrasonic piezoelectric motor. The ultrasonic piezoelectric motor described above includes a vibrating body and a moving body. The vibrating body is connected with the moving body, and the vibrating body is made of piezoelectric material. When the vibrating body is electrified, the vibrating body vibrates, and the vibrating body can drive the moving body to move when it vibrates. The moving body is connected with the zoom lens group, and then the zoom lens group can move to the zoom point along with the moving body. The noise of the driving components in this scheme is small, which is beneficial to reduce the noise of the zoom lens.

In a second aspect, the present application further provides a zoom camera, which includes a casing, an image sensor, and the zoom lens in the first aspect above. The image sensor is located on a side of the second fixed mirror group away from the first fixed mirror group, so as to receive the image transmitted by the zoom lens. The above image sensor and zoom lens are arranged in the casing, thus forming a zoom camera. In this solution, the volume of the zoom lens in the zoom camera is relatively small, which is beneficial to reducing the volume of the zoom camera.

The above-mentioned zoom camera may also include a controller, which is connected to the driving component for signals, that is, signal transmission may be performed between the controller and the driving component. The above-mentioned controller is used to determine the target zoom point, and control the drive assembly to drive the zoom lens group to move to the target zoom point. Specifically, the above-mentioned controller can determine the moving direction and moving distance according to the current position of the zoom lens group and the target zoom point, and then control the driving component to drive the zoom lens group to move the above-mentioned moving distance along the above-mentioned moving setting direction, so that the zooming component moves to Target zoom point. Wherein, the moving direction may be the direction in which the zoom lens group is to move to the target zoom point, and the moving distance may be the distance between the current position of the zoom lens group and the target zoom point. In this solution, the control process is relatively simple, and the structure of the zoom camera is relatively simple.

In this embodiment, the zoom camera may further include at least two position sensors, and the at least two position sensors are arranged in one-to-one correspondence with at least two zoom points. That is to say, a position sensor is provided corresponding to the position of each zoom point. The above-mentioned controller is respectively connected to the drive assembly and each position sensor for signals, so that signal transmission can be performed between the controller, the drive assembly and each position sensor. Specifically, after the above-mentioned controller controls the drive assembly to drive the zoom lens group to move to the target zoom point, it is also used to obtain feedback information from the position sensor corresponding to the target zoom point, and determine whether the zoom lens group is located at the target zoom point according to the feedback information ; When the controller determines that the zoom lens group is not located at the target zoom point, it can control the drive assembly again to drive the zoom lens group to move to the target zoom point. In this solution, the zoom control process of the zoom camera can realize closed-loop control, so that the zoom lens group can be moved to the target zoom point more reliably, and the accuracy of the control process can be improved.

In addition, the above-mentioned zoom camera may also include an additional function mirror group, and the additional function mirror group may include a reflection mirror group, a cut-in mirror group, or a catadioptric mirror group. Specifically, the above-mentioned additional function lens group is cascaded with the zoom lens, so that the zoom camera can not only have the zoom function, but also have additional functions such as periscope, catadioptric, and cut-in, so as to enrich the functions of the zoom camera.

In a third aspect, the present application further provides an electronic device, which includes the above-mentioned zoom camera in the second aspect. In this solution, the volume of the zoom camera is small, which is conducive to reducing the volume of electronic equipment.

Description of drawings

Fig. 1 is the structural representation of zoom lens in the embodiment of the present application;

FIG. 2 is a schematic diagram of a lens group of a zoom lens in an embodiment of the present application;

FIG. 3 is a schematic structural diagram of the zoom lens in the first state in the embodiment of the present application;

4 is a schematic structural diagram of the zoom lens in the second state in the embodiment of the present application;

FIG. 5 is a schematic structural diagram of a zoom lens in an embodiment of the present application;

FIG. 6 is another structural schematic diagram of the zoom lens in the embodiment of the present application;

FIG. 7 is an optical path diagram of the zoom lens in the embodiment of the present application;

Fig. 8 is another optical path diagram of the zoom lens in the embodiment of the present application;

FIG. 9 is another optical path diagram of the zoom lens in the embodiment of the present application;

FIG. 10 is another structural schematic diagram of the zoom lens in the embodiment of the present application;

FIG. 11 is another optical path diagram of the zoom lens in the embodiment of the present application;

FIG. 12 is a schematic structural diagram of a zoom camera in an embodiment of the present application;

FIG. 13 is an optical path diagram of a zoom camera in the embodiment of the present application.

Reference signs:

100-zoom lens; 200-image sensor;

300-shell; 1-fixed part;

2-The first fixed lens group; 3-The second fixed lens group;

4-zoom lens group; 41-the first zoom lens group;

42-the second zoom lens group; 5-drive assembly;

51-motor; 52-guide rod;

53-guide block; 54-magnet;

55-coil; 56-elastic piece;

6-zoom point; 61-first zoom point;

62-the second zoom point; 7-the third fixed lens group;

8 - mirror group.

detailed description

In order to facilitate understanding of the zoom lens, zoom camera, and electronic device provided in the embodiments of the present application, application scenarios thereof are introduced below. Cameras have been used on various devices in various scenarios. For example, it can be applied to image acquisition equipment in monitoring scenarios, robot vision equipment in automated production, image acquisition equipment in automatic navigation systems, smart screens or terminal equipment in video conferencing scenarios, and of course, it can also be applied in daily life terminal equipment, etc., this application does not list them one by one. In some scenarios, the camera does not need to zoom, and can work with the set focal length. However, in many scenarios, the camera also needs to have a zoom function. For example, in a security monitoring system, in order to obtain images of different far and near positions, the camera needs to have a zoom function. Or, when it is applied in a video conference, as the scene of the video conference changes and the number of participants changes, the camera also needs to perform adaptive zoom processing. The zoom cameras in the prior art are usually large in size and difficult to miniaturize. It is not convenient to integrate the zoom camera into electronic devices such as smart screens or terminal devices. It is used as a camera alone, and the large size will also cause users to feel uncomfortable when using it. to the obvious intrusion. To this end, the present application provides a zoom lens, a zoom camera and electronic equipment with a small volume. The following examples are listed in conjunction with the accompanying drawings to illustrate the technical solution of the present application.

The terms used in the following examples are for the purpose of describing particular examples only, and are not intended to limit the application. As used in the specification and appended claims of this application, the singular expressions "a", "an", "said", "above", "the" and "this" are intended to also Expressions such as "one or more" are included unless the context clearly dictates otherwise.

Reference to "one embodiment" or "a particular embodiment" or the like described in this specification means that a particular feature, structure, or characteristic described in connection with the embodiment is included in one or more embodiments of the present application. The terms "including", "comprising", "having" and variations thereof mean "including but not limited to", unless specifically stated otherwise.

The present application provides a zoom lens. The zoom lens refers to a lens that can change the focal length within a certain range, so as to obtain different viewing angles. Among them, the focal length is used to measure the concentration or divergence of light in the optical system, specifically referring to the distance from the optical center of the lens to the focal point of light concentration when parallel light is incident. For cameras with the same parameters, the longer the focal length, the higher the pixel resolution of the captured image, and the clearer the shooting. The field of view refers to the shooting range of the camera, and the unit is angle. The larger the angle, the larger the shooting range of the camera, that is, the larger the field of view of the camera. Generally, the viewing angle has a value range of 10°-30°, 50°-70°, 90°-120°, or 180°-360°. In addition, the parameters of the camera lens include the total optical length, which refers to the distance from the first lens of the camera lens to the focal plane of the image sensor. Specifically, the above-mentioned first lens refers to the lens farthest from the image sensor among all the lenses of the camera lens. In other words, the above-mentioned first lens refers to the outermost lens of the camera lens. An image sensor, or photosensitive element, is a device that converts an optical image into an electronic signal.

FIG. 1 is a schematic structural diagram of a zoom lens in an embodiment of the present application, and FIG. 2 is a schematic diagram of a lens group of a zoom lens in an embodiment of the present application. As shown in FIG. 1 and FIG. 2 , the zoom lens 100 in the embodiment of the present application includes a fixed part 1 , a first fixed lens group 2 , a second fixed lens group 3 , a zoom lens group 4 and a driving assembly 5 . The first fixed mirror group 2 and the second fixed mirror group 3 are fixedly arranged on the fixed part 1 , that is to say, the first fixed mirror group 2 and the second fixed mirror group 3 will not move relative to the fixed part 1 . The zoom lens group 4 is arranged between the first fixed mirror group 2 and the second fixed mirror group 3, and the optical axis of the above-mentioned zoom lens group 4, the optical axis of the first fixed mirror group 2 and the optical axis of the second fixed mirror group 3 The axes overlap. The above-mentioned zoom lens group 4 is connected with a driving assembly 5 , and the driving assembly 5 can drive the zoom lens group 4 to move between the first fixed lens group 2 and the second fixed lens group 3 . Further, there are at least two zoom points 6 between the first fixed mirror group 2 and the second fixed mirror group 3, and the zoom points 6 are located on the optical axis of the first fixed mirror group 2, that is, at the optical axis of the zoom mirror group 4 The optical axis and the optical axis of the second fixed mirror group 3. The above-mentioned driving assembly 5 drives the zoom lens group 4 to change positions among the above-mentioned zoom points 6 . That is to say, the driving assembly 5 can drive the zoom lens group 4 to be located at any zoom point 6 among the at least two zoom points 6 . The refractive powers of the first fixed lens group 2 and the second fixed lens group 3 are positive, and the refractive power of the zoom lens group 4 is negative. When the zoom lens group 4 is located at the zoom point 6, clear imaging can be achieved. The above-mentioned first fixed lens group 2 and the second fixed lens group 3 are used to realize basic imaging. By driving the zoom lens group 4 at different zoom points 6, the focal length of the above-mentioned zoom lens 100 can be changed to correspond to different magnifications and angles of view , so as to realize two-step or multi-step zooming of the zoom lens 100 .

In the technical solution of the present application, since there are at least two zoom points 6 between the first fixed lens group 2 and the second fixed lens group 3 , and the zoom lens group 4 can move to any zoom point 6 to achieve clear imaging. Therefore, in this embodiment, zooming can be realized by disposing the zoom lens group 4 between the first fixed lens group 2 and the second fixed lens group 3 , and the total optical length of the zoom lens 100 is relatively small. Since the optical axis of the zoom lens group 4 , the optical axis of the first fixed lens group 2 and the second fixed lens group 3 overlap, the thickness of the zoom lens 100 is also small. The zoom lens 100 in this solution is small in size, which is beneficial to miniaturization of the zoom camera. In addition, it is beneficial to integrate the zoom lens 100 into electronic devices, for example, it is convenient to integrate and configure the zoom lens 100 in smart screens, integrated conference terminals, or mobile terminals such as mobile phones and tablet computers.

In a specific embodiment, the number of lenses included in each lens group is not limited, and may include at least one lens. For example, each lens group may include one lens, or may include at least two lenses. In addition, the number of lenses included in the above lens groups may be the same or different, which is not limited in this application. For example, the above-mentioned zoom lens group 4 may include one lens, or may include at least two lenses, which is not limited in the present application. Likewise, the above-mentioned first fixed lens group 2 may also include one lens, or may include at least two lenses. Alternatively, the above-mentioned second fixed lens group 3 may also include one lens, or may include at least two lenses. When the lens group includes at least two lenses, the imaging is clearer. When the lens group includes at least two lenses, the adjacent lenses can be arranged in contact with each other, or there can be a certain gap between the adjacent lenses.

Please continue to refer to FIG. 1 and FIG. 2. In the embodiment of the present application, the zoom lens 100 includes a zoom lens group 4, and there are two zoom points 6 between the first fixed lens group 2 and the second fixed lens group 3. The first zoom point 6 can be respectively a first zoom point 61 and a second zoom point 62 . Driven by the driving assembly 5 , the above-mentioned zoom lens group 4 can be located at the above-mentioned first zoom point 61 or the second zoom point 62 , so as to realize two-stage zooming of the zoom lens 100 . FIG. 3 is a schematic structural diagram of the zoom lens in the first state in the embodiment of the present application, and FIG. 4 is a schematic structural diagram of the zoom lens in the second state in the embodiment of the present application. As shown in FIG. 3 , the zoom lens group 4 is located at the first zoom point 61 , the zoom lens 100 is in the first state, and the focal length of the zoom lens 100 is the first focal length. As shown in FIG. 4 , the zoom lens group 4 is located at the second zoom point 62 , and the zoom lens 100 is in the second state, and the focal length of the zoom lens 100 is the second focal length. In this embodiment, the zoom lens group 4 only includes one zoom lens group 4, so the structure is relatively simple, and it is convenient to realize the miniaturization of the zoom lens 100.

FIG. 5 is a schematic structural diagram of a zoom lens in an embodiment of the present application. Please refer to FIGS. 1 and 5 . In one embodiment, the driving assembly 5 includes a motor 51 , a guide rod 52 and a guide block 53 . The guide rod 52 is connected to the motor 51, the guide block 53 is connected to the zoom lens group 4, and the guide rod 52 is connected to the guide block 53 in transmission, so that the motor 51 can drive the zoom lens group 4 to move through the guide rod 52 and the guide block 53.

The specific structures of the guide rod 52 and the guide block 53 are not limited. In a specific embodiment, the above-mentioned guide rod 52 has a first thread, and the guide block 53 has a second thread, and the above-mentioned first thread is matched with the second thread, so that the guide rod 52 and the guide block 53 can be connected in transmission. The above-mentioned embodiment is only a specific embodiment of the driving assembly 5, and in other embodiments, the driving assembly 5 may also have other structures, which are not limited in this application.

For example, in another specific embodiment, the above-mentioned guide rod can be a rack, and the guide block can be a gear, and the rack and the gear are matched, so that this solution can also drive the movement of the zoom lens group.

FIG. 6 is another schematic structural diagram of the zoom lens in the embodiment of the present application. As shown in FIG. 6 , in another specific embodiment, the driving component includes a voice coil motor. The voice coil motor includes a magnet 54, a coil 55 and an elastic member 56. The magnet 54 is connected to the zoom lens group 4. In addition, the magnet 54 is also connected to the elastic member 56. The end of the elastic member 56 away from the magnet 54 is connected to the fixed part 1. . The coil 55 is arranged opposite to the magnet 54 , and when the coil 55 is energized, the electromagnetic field generated by the coil can drive the magnet 54 to drive the zoom lens group 4 to move. After the coil 55 drives the magnet 54 to move, the coil 55 is powered off, the electromagnetic field generated by the coil 55 disappears, and the elastic member 56 drives the magnet 54 to reset.

In a specific embodiment, when the coil 55 is not energized, the magnet 54 drives the zoom lens group 4 to locate at the second zoom point 62 . When the coil 55 is energized, the coil 55 drives the magnet 54 to drive the zoom lens group 4 to move to the first zoom point 61 , thereby realizing the movement of the zoom lens group 4 . When the zoom lens includes multiple zoom points 6 , multiple coils 55 can be provided to drive the zoom lens group 4 to move to any zoom point 6 by driving the magnet 54 .

In yet another specific embodiment, the drive assembly includes an ultrasonic piezoelectric motor. The ultrasonic piezoelectric motor includes a vibrating body and a moving body, the vibrating body is connected to the moving body, and the vibrating body is made of piezoelectric material, which can drive the moving body to move. The moving body is connected to the zoom lens group, and driven by the vibrating body, the moving body can drive the zoom lens group to move to any zoom point. In this solution, the noise of the ultrasonic piezoelectric motor is small, which is beneficial to reduce the noise generated during the working process of the zoom lens.

Fig. 7 is a kind of optical path diagram of the zoom lens in the embodiment of the present application, as shown in Fig. 7, in one embodiment, the above-mentioned zoom lens 100 comprises a zoom lens group 4, the above-mentioned first fixed lens group 2 and the second fixed lens group There are two zoom points 6 between the lens groups 3 , and the above two zoom points 6 may be a first zoom point 61 and a second zoom point 62 respectively. In the embodiment shown in FIG. 7 , the lens composition of the zoom lens 100 is 8G3P, where G refers to glass material (Glass), P refers to plastic material (Plastic), and the aperture is 1.8-2.0. The total optical length of the zoom lens 100 may be 25mm, and the thickness of the zoom lens 100 may be 30mm. The zoom lens 100 in this embodiment can realize two-stage 2X optical zoom of 10mm-20mm. In the prior art continuous zoom solution with a focal length of 10mm-20mm, the total optical length is at least 35mm. It can be seen that the embodiment of the present application greatly reduces the total optical length of the zoom lens. In addition, in the technical solution of the present application, the zoom lens group 4 , the first fixed lens group 2 and the second fixed lens group 3 are arranged coaxially without increasing the thickness of the zoom lens 100 . Therefore, the present application is beneficial to reduce the total optical length and realize the miniaturization of the optical lens.

FIG. 8 is another optical path diagram of the zoom lens in the embodiment of the present application. As shown in FIG. There are also two zoom points 6 between the two fixed lens groups 3 , and the above two zoom points 6 may be a first zoom point 61 and a second zoom point 62 respectively. In the embodiment shown in FIG. 8 , the lens composition of the zoom lens 100 is 13G2P, and the aperture is 1.8-2.0. The total optical length of the zoom lens 100 in this embodiment can be 35 mm, and the thickness of the zoom lens 100 is 35 mm. The zoom lens 100 in this embodiment can realize two-stage 3X optical zoom of 10 mm-30 mm. In the prior art continuous zoom solution with a focal length of 10mm-30mm, the total optical length is at least 50mm. It can be seen that the embodiment of the present application greatly reduces the total optical length of the zoom lens. Likewise, in the technical solution of the present application, the zoom lens group 4 , the first fixed lens group 2 and the second fixed lens group 3 are coaxially arranged without increasing the thickness of the zoom lens 100 . Therefore, the present application is beneficial to reduce the total optical length and realize the miniaturization of the optical lens.

FIG. 9 is a schematic diagram of another lens group of the zoom lens in the embodiment of the present application. As shown in FIG. 9 , in other embodiments, the above-mentioned zoom lens 100 may further include at least two above-mentioned zoom lens groups 4 , and a third fixed lens group 7 is arranged between any adjacent zoom lens groups 4 . In this solution, there are multiple zoom points 6 between the first fixed mirror group 2 and the second fixed mirror group 3, and when the zoom lens group is located at any position among the multiple zoom points 6, the zoom lens 100 can realize clear imaging, corresponding to A plurality of different magnifications can increase the zooming gears of the zoom lens group 4 and enrich the zoom options of the zoom lens 100 .

In a specific technical solution, the number of lenses included in the third fixed lens group 7 is not limited. For example, the third fixed lens group 7 includes one lens, and may also include at least two lenses. Specifically, the composition of the above-mentioned third fixed mirror group 7 can be designed according to actual requirements.

In the above embodiment, when the zoom lens 100 includes at least two zoom lens groups 4 , all the zoom lens groups 4 can be relatively fixed. Specifically, FIG. 10 is another structural schematic diagram of the zoom lens in the embodiment of the present application. As shown in FIG. 10, all the zoom lens groups 4 can be fixedly connected through the fixing parts first, and then the above-mentioned fixing parts can be connected with the drive assembly. . For example, the fixing part is fixedly connected with the guide block, so that the driving part can drive all the zoom lens groups 4 to move simultaneously. Alternatively, each zoom lens group can be fixedly connected to the guide block, or the guide block can drive all the zoom lens groups to move simultaneously.

FIG. 11 is another optical path diagram of the zoom lens in the embodiment of the present application. As shown in FIG. 11 , in a specific embodiment, the zoom lens 100 includes a first fixed lens group 2 , a second fixed lens group 3 , two zoom lens groups 4 and a third fixed lens group 7 . The above two zoom lens groups 4 are respectively a first zoom lens group 41 and a second zoom lens group 42 . The above-mentioned first zoom lens group 41 and the second zoom lens group 42 are arranged between the first fixed lens group 2 and the second fixed lens group 3, and the above-mentioned third fixed lens group 7 is arranged between the first zoom lens group 41 and the second fixed lens group. Between the zoom lens group 42. That is to say, the first fixed lens group 2 , the first zoom lens group 41 , the third fixed lens group 7 , the second zoom lens group 42 and the second fixed lens group 3 are arranged coaxially in sequence. In the embodiment shown in FIG. 11 , the lens composition of the zoom lens 100 is 15G2P, and the aperture is 1.8-2.0. The total optical length of the zoom lens 100 in this embodiment may be 50 mm, and the module thickness may be 40 mm. The zoom lens 100 in this embodiment includes four zoom points 6, and can realize 5X optical zoom in four steps of 10mm-50mm. In the prior art continuous zoom solution with a focal length ranging from 10 mm to 50 mm, the total optical length is at least 85 mm. It can be seen that to achieve the same zoom function, the total optical length of the zoom lens in the technical solution of the present application is smaller. In this solution, the first zoom lens group 41 and the second zoom lens group 42 are driven by the same driving assembly 5, or the two zoom lens groups 4 are fixed as an integral structure. For example, the first zoom lens group 41 and the second zoom lens group 42 are simultaneously fixed on the guide block 53 , driven by the guide rod 52 , the first zoom lens group 41 and the second zoom lens group 42 move to a certain zoom point simultaneously. Similarly, in the technical solution of the present application, the zoom lens group 4 , the first fixed lens group 2 , the second fixed lens group 3 and the third fixed lens group 7 are coaxially arranged without increasing the thickness of the zoom lens 100 . Therefore, the present application is beneficial to reduce the total optical length and realize the miniaturization of the optical lens.

Based on the same inventive concept, the present application also provides a zoom camera. Fig. 12 is a schematic structural diagram of a zoom camera in an embodiment of the present application. As shown in Fig. 12, the zoom camera includes the zoom lens 100 in any of the above-mentioned technical solutions, and also includes an image sensor 200 and a housing 300. The above-mentioned image sensor 200 and the zoom lens 100 are disposed in the casing 300 . The above-mentioned image sensor 200 is located on a side of the second fixed mirror group 3 away from the first fixed mirror group 2 . The optical image of the object is transmitted to the image sensor 200 through the zoom lens 100, and the image sensor 200 converts the optical image into an electronic signal for transmission and storage of the signal to transmit and store the image. The zoom camera in this embodiment has a small volume when it has a zoom function, which is conducive to miniaturization of the zoom camera and facilitates the integration of the zoom camera into electronic equipment.

The zoom camera also includes a controller, which is signal-connected to the driving component, that is, signal transmission can be performed between the controller and the driving component. Specifically, the above-mentioned controller may be electrically connected to the driving component, or may also be connected in a wireless manner, which is not limited in the present application. The above-mentioned controller is used to determine the target zoom point, determine the moving direction and moving distance of the zoom lens group according to the current position of the zoom lens group and the target zoom point, and control the driving component to drive the zoom lens group to move the above-mentioned moving distance along the above-mentioned moving direction, so that The zoom lens group moves from the current position to the target zoom point. Specifically, the above moving direction is the direction in which the zoom lens group is to move to the target zoom point, and the moving distance may be the distance between the current position of the zoom lens group and the target zoom point. For example, taking the zoom point including the first zoom point and the second zoom point as an example, when the zoom lens group is currently at the position of the first zoom point and needs to move to the second zoom point, the above-mentioned first zoom point is the current position, and the second zoom point The second zoom point is the target zoom point, the moving direction is the direction from the first zoom point to the second zoom point, and the moving distance is the distance between the first zoom point and the second zoom point. In this solution, the control process is relatively simple, and the structure of the zoom camera is relatively simple.

In another embodiment, the zoom camera may further include at least two position sensors. The above-mentioned at least two position sensors are provided in one-to-one correspondence with at least two zoom points. That is to say, a position sensor is provided corresponding to the position of each zoom point. The above-mentioned controller is also connected with each position sensor for signal, so the controller can carry out signal transmission with the position sensor. Specifically, the above-mentioned controller may be electrically connected to the position sensor, or may also be connected in a wireless manner, which is not limited in the present application. Specifically, after the above-mentioned controller controls the driving component to drive the zoom lens group to move the above-mentioned moving distance along the moving direction, it is also used to obtain feedback information from the position sensor corresponding to the target zoom point, and determine whether the zoom lens group is is located at the target zoom point; when the controller determines that the zoom lens group is not at the target zoom point, it can control the drive assembly again to drive the zoom lens group to move to the target zoom point. In this solution, the zoom control process of the zoom camera can realize closed-loop control, so that the zoom lens group can be moved to the target zoom point more reliably, and the accuracy of the control process can be improved.

In a specific embodiment, the controller may receive an operation instruction from the user to determine the target zoom point, or the controller may calculate the zoom point required by the current scene as the target zoom point, which is not limited in this application.

FIG. 13 is an optical path diagram of the zoom camera in the embodiment of the present application. As shown in FIG. 13 , the above-mentioned zoom camera may further include a mirror group 8 to form a complex optical path of the periscope optical path. Thus forming a zoom camera with periscope function. In other embodiments, the zoom camera may also include additional functional mirror groups such as a catadioptric mirror group or a cut-in mirror group to form complex functions such as a catadioptric optical path and a cut-in optical path, thereby forming a zoom camera with more functions.

In the embodiment shown in FIG. 13 , the zoom camera is provided with a mirror group 8 , and the mirror group 8 and the zoom lens 100 can be cascaded to form a periscope zoom camera. In this embodiment, two 2X optical zooms with an equivalent focal length of 66mm-132mm can be realized, and the thickness of the lens group of the zoom camera is 8mm, which can be applied to telephoto lenses of terminal equipment such as terminal mobile phones. This solution can double the focal length of the original telephoto lens. With digital magnification, ultra-telephoto photography with an equivalent focal length of more than 500mm can be realized.

In addition, the present application also provides an electronic device. The electronic device includes the zoom camera described above. The electronic device has a housing. In a specific embodiment, the zoom camera may be integrated into the housing of the electronic device as a built-in camera of the electronic device. It can also be arranged on the outside of the casing as a peripheral zoom camera of the electronic device.

The above-mentioned electronic device may also include a controller, which is connected with the image sensor and the driving component, and the controller can use the image sensor to acquire images, and control the driving component to drive the zoom lens group to move, and adjust the focal length of the zoom camera.

The specific type of the electronic device in the embodiment of the present application is not limited. For example, the electronic device can be a telepresence conference terminal, so that an external large zoom lens can be built in to provide a professional conference effect in a large conference room and at the same time improve Privacy protection for meetings. In addition, the above-mentioned electronic device may also be a security monitoring device, a smart screen, a robot vision device, a laser radar device, or a mobile terminal.

Apparently, those skilled in the art can make various changes and modifications to this application without departing from the protection scope of this application. In this way, if these modifications and variations of the present application fall within the scope of the claims of the present application and their equivalent technologies, the present application is also intended to include these modifications and variations.

Claims

A zoom lens is characterized in that it includes a first fixed lens group, a second fixed lens group and at least one zoom lens group, wherein:

The first fixed mirror group and the second fixed mirror group are fixedly arranged, and there are at least two zoom points between the first fixed mirror group and the second fixed mirror group; the zoom mirror group is movably arranged on the Any one of the at least two zoom points; the optical axis of the zoom lens group, the optical axis of the first fixed lens group overlaps the optical axis of the second fixed lens group, and the first fixed lens group The optical power of the lens group and the second fixed lens group is positive, and the optical power of the zoom lens group is negative.
The zoom lens according to claim 1, wherein the zoom lens further comprises a drive assembly connected to the zoom lens group for driving the zoom lens group to move to any of the zoom lens groups. focus.
The zoom lens according to claim 1 or 2, wherein the zoom lens includes one zoom lens group, and there are two fixed lens groups between the first fixed lens group and the second fixed lens group. zoom point.
The zoom lens according to claim 1 or 2, wherein the zoom lens comprises at least two zoom lens groups, and a third fixed lens group is arranged between any adjacent zoom lens groups.
The zoom lens according to claim 4, wherein the positions of any two zoom lens groups in the at least two zoom lens groups are relatively fixed.
The zoom lens according to claim 5, wherein the at least two zoom lens groups are fixedly connected by a fixing member, and the fixing member is connected to the driving assembly.
The zoom lens according to any one of claims 1 to 6, wherein the drive assembly includes a motor, a guide rod and a guide block, the motor is connected to the guide rod, and the guide block is connected to the zoom The mirror group is connected; the guide rod is connected with the guide block through transmission.
The zoom lens according to any one of claims 1 to 6, wherein the driving assembly includes a voice coil motor, and the voice coil motor includes a magnet, a coil and an elastic member, and the magnet and the zoom lens group One end of the elastic member is connected to the magnet, and the other end is fixedly arranged; when the coil is energized, an electromagnetic field is formed to drive the magnet to move.
The zoom lens according to any one of claims 1 to 6, wherein the driving assembly includes an ultrasonic piezoelectric motor, the ultrasonic piezoelectric motor includes a vibrating body and a moving body, and the moving body and the zoom The mirror group is connected, the vibrating body is connected with the moving body, and the vibrating body drives the moving body to move when vibrating.
The zoom lens according to any one of claims 1 to 9, wherein the zoom lens group includes at least one lens; the first fixed lens group includes at least one lens; and the second fixed lens group includes at least one lens. A lens.
A zoom camera, characterized in that it includes an image sensor and the zoom lens according to any one of claims 1 to 10, the image sensor is located at the second fixed mirror group of the zoom lens away from the first One side of the fixed lens group, the image sensor is used to convert the optical image acquired through the zoom lens into an electrical signal.
The zoom camera according to claim 11, wherein the zoom camera further comprises a controller, the controller is signal-connected to the drive assembly, and the controller is used to determine the target zoom point and control the drive A component drives the zoom lens group to move to the target zoom point.
The zoom camera according to claim 12, wherein the zoom camera further comprises at least two position sensors, and the at least two position sensors are set in one-to-one correspondence with the at least two zoom points, and the controller respectively signal-connected with the drive assembly and each of the position sensors;

Each of the position sensors is used to feed back to the controller whether the zoom lens group is located at the corresponding zoom point.
The zoom camera according to any one of claims 11 to 13, characterized in that, the zoom camera further comprises any one of a reflection mirror group, a cut-in mirror group, or a catadioptric mirror group cascaded with the zoom lens .
An electronic device, characterized by comprising the zoom camera according to any one of claims 11-14.