CN114779427A

CN114779427A - Lens subassembly, optical imaging system, camera module and electronic equipment

Info

Publication number: CN114779427A
Application number: CN202210266039.2A
Authority: CN
Inventors: 董富伟
Original assignee: Guangdong Oppo Mobile Telecommunications Corp Ltd
Current assignee: Guangdong Oppo Mobile Telecommunications Corp Ltd
Priority date: 2022-03-17
Filing date: 2022-03-17
Publication date: 2022-07-22
Anticipated expiration: 2042-03-17
Also published as: WO2023173848A1; CN114779427B

Abstract

The application provides a lens subassembly, optical imaging system, camera module and electronic equipment. The lens assembly comprises a bearing layer, wherein the bearing layer is provided with a first surface which is a curved surface; a zoom layer disposed on the first surface of the carrier layer; the flexible layer is arranged on one side, far away from the bearing layer, of the zoom layer; and the actuator is borne on the flexible layer and is used for driving the flexible layer to deform, so that the zoom layer is driven to elastically deform, and the focal length of the lens assembly is changed. The lens component of the embodiment of the application has a larger focal length variation range and a larger clear aperture.

Description

Lens assembly, optical imaging system, camera module and electronic equipment

Technical Field

The application relates to the field of electronics, concretely relates to lens subassembly, optical imaging system, camera module and electronic equipment.

Background

With the development of the technology and the improvement of the living standard, people have higher and higher requirements on the camera, and the camera is expected to meet the shooting requirements of both long-range view and close-range view, especially the camera applied to portable electronic equipment such as a mobile phone, and is required to have a larger focal length change range while meeting the miniaturization requirement, so that the camera can be better suitable for different scenes. However, the focal length variation range of the existing zoom lens is still small, and the requirements of users cannot be well met.

Disclosure of Invention

In view of the above problems, embodiments of the present application provide a lens assembly having a larger focal length variation range and a larger clear aperture.

An embodiment of a first aspect of the present application provides a lens assembly, including:

the bearing layer is provided with a first surface, and the first surface is a curved surface;

a zoom layer disposed on the first surface of the carrier layer;

the flexible layer is arranged on one side, far away from the bearing layer, of the zoom layer; and

the actuator is borne on the flexible layer and used for driving the flexible layer to deform, so that the zoom layer is driven to elastically deform, and the focal length of the lens assembly is changed.

The second aspect of the present application provides an optical imaging system, which includes: the lens assembly of an embodiment of the present application, the optical imaging system has an object side, and the flexible layer of the lens assembly is closer to the object side of the optical imaging system than the zoom layer.

An embodiment of a third aspect of the present application provides a camera module, which includes:

the optical imaging system of the embodiment of the application; and

a photosensitive element located on an image side of the optical imaging system.

An embodiment of a fourth aspect of the present application provides an electronic device, which includes:

the camera module is used for shooting images;

the display module is used for displaying the images shot by the camera module; and

the circuit board module is respectively electrically connected with the camera module and the display module, is used for controlling the camera module to shoot and is used for controlling the display module to display.

The lens assembly of the embodiments of the present application carries layers, zoom layers, flexible layers, and actuators. The carrier layer has the first surface, the first surface is the curved surface, this makes the lens subassembly just have certain spotlight effect or divergent effect to light when the actuator does not start, thereby certain focal power has, open when the actuator, flexible layer and varifocal layer take place deformation, when the surface that the varifocal layer was kept away from to the flexible layer formed curved surface type, the first surface is the curved surface, can make the surface that the varifocal layer was kept away from to the flexible layer form bigger camber (the radius of curvature that is littleer), thereby through the position of control actuator to the power of applying to the flexible layer, direction, size etc., can make light-transmitting component have great focal power scope, thereby great focus variation range has.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required to be used in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present application, and it is obvious for those skilled in the art to obtain other drawings without creative efforts.

FIG. 1 is a schematic structural diagram of a lens assembly according to an embodiment of the present application.

FIG. 2 is a cross-sectional structural view of a lens assembly of an embodiment of the present application along the direction A-A in FIG. 1.

FIG. 3 is a cross-sectional view of a lens assembly of another embodiment of the present application along the line A-A in FIG. 1.

Fig. 4 is a schematic structural diagram of the first driving assembly or the second driving assembly according to an embodiment of the present application.

Fig. 5 is a schematic cross-sectional view of the first driving assembly or the second driving assembly of an embodiment of the present application along the direction B-B in fig. 4.

FIG. 6 is a cross-sectional view of a lens assembly of another embodiment of the present application along the line A-A in FIG. 1.

FIG. 7 is a cross-sectional structural view of a lens assembly of another embodiment of the present application taken along the line A-A in FIG. 1.

FIG. 8 is a cross-sectional structural view along the line A-A in FIG. 1 of a lens assembly in a first state according to an embodiment of the present application.

FIG. 9 is a cross-sectional view along the line A-A in FIG. 1 of a lens assembly in a second state according to an embodiment of the present application.

FIG. 10 is a cross-sectional view along the line A-A in FIG. 1 of a lens assembly in a third state according to an embodiment of the present application.

FIG. 11 is a cross-sectional view along the line A-A in FIG. 1 of a lens assembly in a fourth state according to an embodiment of the present application.

FIG. 12 is a cross-sectional view of a lens assembly of another embodiment of the present application, taken along the line A-A in FIG. 1.

FIG. 13 is a cross-sectional view of a lens assembly of another embodiment of the present application along the line A-A in FIG. 1.

FIG. 14 is a cross-sectional view of a lens assembly of another embodiment of the present application, taken along the line A-A in FIG. 1.

Fig. 15 is a schematic structural diagram of an optical imaging system according to an embodiment of the present application.

Fig. 16 is a schematic structural diagram of an optical imaging system according to still another embodiment of the present application.

Fig. 17 is a schematic structural diagram of an optical imaging system according to still another embodiment of the present application.

Fig. 18 is a schematic structural diagram of an optical imaging system according to still another embodiment of the present application.

Fig. 19 is a schematic structural diagram of a camera module according to an embodiment of the present application.

Fig. 20 is a schematic structural diagram of an electronic device according to an embodiment of the present application.

Fig. 21 is a schematic diagram of a partially exploded structure of an electronic device according to an embodiment of the present application.

Fig. 22 is a circuit block diagram of an electronic device according to an embodiment of the present application.

Fig. 23 is a circuit block diagram of an electronic device according to still another embodiment of the present application.

Description of the reference numerals:

100-lens component, 101-receiving space, 10-carrier layer, 11-first surface, 30-zoom layer, 50-flexible layer, 51-second surface, 70-actuator, 71-first drive component, 711-first electrode, 713-actuator layer, 715-second electrode, 73-second drive component, 90-support, 200-optical imaging system, 210-non-zoom lens, 230-diaphragm, 250-infrared cut-off filter, 270-protective sheet, 300-camera module, 310-photosensitive element, 331-receiving chamber, 400-electronic device, 410-display module, 420-middle frame, 430-circuit board module, 431-processor, 433-memory, 450-housing, 451-light-transmitting part.

Detailed Description

In order to make the technical solutions of the present application better understood, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only a part of the embodiments of the present application, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.

The terms "first," "second," and the like in the description and claims of the present application and in the foregoing drawings are used for distinguishing between different objects and not for describing a particular sequential order. Furthermore, the terms "include" and "have," as well as any variations thereof, are intended to cover non-exclusive inclusions. For example, a process, method, system, article, or apparatus that comprises a list of steps or elements is not limited to only those steps or elements listed, but may alternatively include other steps or elements not listed, or inherent to such process, method, article, or apparatus.

The technical solutions in the embodiments of the present application will be described below with reference to the accompanying drawings.

It should be noted that, for convenience of description, like reference numerals denote like components in the embodiments of the present application, and a detailed description of the like components is omitted in different embodiments for the sake of brevity.

The embodiment of the present application provides a lens assembly 100, which may be applied to an optical imaging system 200 (as shown in fig. 15 and 16), for example, the optical imaging system 200 of an electronic device 400 (as shown in fig. 20) with a photographing function, such as a camera, a camera phone, a vehicle data recorder, an in-vehicle camera, a tablet computer, a notebook computer, a desktop computer, a smart bracelet, a smart watch, an e-reader, smart glasses, a security device, a monitoring device, and a visible doorbell.

Referring to fig. 1-3, the present application provides a lens assembly 100, which includes a carrier layer 10, a zoom layer 30, a flexible layer 50, and an actuator 70. The bearing layer 10 is provided with a first surface 11, and the first surface 11 is a curved surface; the zoom layer 30 is disposed on the first surface 11 of the carrier layer 10; the flexible layer 50 is arranged on the side of the zoom layer 30 away from the bearing layer 10; the actuator 70 is carried on the flexible layer 50, and the actuator 70 is configured to drive the flexible layer 50 to deform, so as to drive the zoom layer 30 to elastically deform, so as to change the focal length of the lens assembly 100.

The first surface 11 is curved, it being understood that the first surface 11 is non-planar.

The zoom layer 30 is disposed on the first surface 11 of the carrier layer 10, and the zoom layer 30 may be directly disposed on the first surface 11 and bonded to the first surface 11; it is also possible that the zoom layer 30 is disposed above the first surface 11, and another light-transmitting member, such as optical adhesive (OCA adhesive) or the like, may be disposed between the zoom layer 30 and the first surface 11, and the zoom layer 30 is attached to the first surface 11 by the optical adhesive.

The flexible layer 50 is arranged on the side of the zoom layer 30 away from the bearing layer 10; the flexible layer 50 may be disposed close to the surface of the carrier layer 10 away from the zoom layer 30, and directly bonded to the surface of the carrier layer 10 away from the zoom layer 30, or disposed at an interval between the flexible layer 50 and the surface of the carrier layer 10 away from the zoom layer 30, and further disposed with other light-transmitting members, such as optical cement (OCA cement), and the flexible layer 50 is attached to the surface of the zoom layer 30 through the optical cement.

When the lens assembly 100 is applied to the optical imaging system 200, the flexible layer 50 is closer to the object side of the optical imaging system 200 than the zoom layer 30, in other words, the zoom layer 30 is closer to the image side of the optical imaging system 200 than the flexible layer 50, and light (such as a dotted arrow in fig. 2 and 3) is incident from the flexible layer 50 side of the lens assembly 100, passes through the flexible layer 50, the zoom layer 30 and the carrier layer 10 in sequence, and exits from the side of the carrier layer 10 away from the flexible layer 50, and the light is refracted when passing between each two adjacent layer structures, and by controlling the surface type of the first surface 11 and the surface type of the flexible layer 50 away from the zoom layer 30, the lens assembly 100 can be controlled to converge light to form a convex lens, and the lens assembly 100 can be controlled to diverge light to form a concave lens. When it is necessary to change the focal length of the lens assembly 100, the actuator 70 is activated, and the actuator 70 applies a compressive force or a tensile force to at least a portion of the flexible layer 50, so that the flexible layer is bent by the actuator 70, thereby pressing the variable focal length layer 30, and elastically deforming the variable focal length layer 30, thereby changing the path of light propagation and changing the focal length of the lens assembly 100. By controlling the magnitude of the compressive force or the tensile force applied by the actuator 70 and the position on which the compressive force or the tensile force acts, the flexible layer 50 can be deformed in different degrees and different forms, so that the zoom layer 30 is deformed in different degrees and different forms under the action of the flexible layer 50, thereby controlling the focal length of the lens assembly 100.

Lens assembly 100 of the present embodiment carries layer 10, zoom layer 30, flexible layer 50, and actuator 70. The carrier layer 10 has a first surface 11, the first surface 11 is a curved surface, which enables the lens assembly 100 to have a certain light-focusing effect or a certain light-diverging effect when the actuator 70 is not activated, so as to have a certain focal power, when the actuator 70 is activated, the flexible layer 50 and the zoom layer 30 deform, and the surface of the flexible layer 50 away from the zoom layer 30 forms a curved surface type, the first surface 11 is a curved surface, which enables the surface of the flexible layer 50 away from the zoom layer 30 to form a larger curvature (i.e. a smaller curvature radius), so that by controlling the position, direction, magnitude, etc. of the force applied by the actuator 70 to the flexible layer 50, the light-transmitting assembly can have a larger focal power range, so as to have a larger focal length variation range. In addition, under the condition of the same structure and material, when the first surface 11 is a curved surface, a larger curvature can be brought compared with the case that the first surface 11 is a plane, so that the lens assembly 100 with a larger focal length variation range and a larger clear aperture can be obtained.

The term "focal power" herein characterizes the ability of an optical system to deflect light rays. The focal power includes a positive focal power and a negative focal power. The term "Clear Aperture" in the present application refers to the diameter of a circular hole in a camera, which is created in the center of the lens by an iris diaphragm (blade group) when the diaphragm is adjusted.

The lens assembly 100 has an optical axis, which is indicated by the dashed line O-O in FIG. 2 for the lens assembly 100. The optical axis of the lens assembly 100 of the present application is parallel to the stacking direction of the carrier layer 10, the zoom layer 30 and the flexible layer 50. The term "optical axis" in this application refers to the center line of a light beam (column), or the axis of symmetry of an optical system.

Optionally, the focal length f of the lens assembly 100 ranges from-200 mm < f < -5mm, or 2mm < f < 100 mm. In particular, the focal length f of the lens assembly 100 may be, but is not limited to, -200mm, -180mm, -150mm, -120mm, -100mm, -80mm, -50mm, -20mm, -10mm, -5mm, 2mm, 5mm, 10mm, 20mm, 30mm, 40mm, 50mm, 60mm, 70mm, 80mm, 60mm, 100mm, etc. The focal length f of the lens assembly 100 can be changed within the range of-200 mm to f less than-5 mm, or within the range of 2mm to f less than 100mm, so that the lens assembly has a large focal length change range, can have a large focusing range when being applied to a camera, can be suitable for shooting objects with different depths of field, and better meets the requirements of users. In addition, when the lens assembly 100 of the present application is applied to the optical imaging system 200, the lens assembly can also be applied to macro photography, so as to obtain a larger image magnification. For example, a shooting distance of less than 10cm, or a shooting distance of less than 5 cm.

Optionally, the clear aperture D of the lens assembly 100 is in a range of 1.5mm ≦ D ≦ 7 mm. Further, the range of the clear aperture D of the lens assembly 100 is greater than or equal to 3mm and less than or equal to 7 mm. Still further, the range of the clear aperture D of the lens assembly 100 is greater than or equal to 5mm and less than or equal to 7 mm. Specifically, the clear aperture D of the lens assembly 100 may be, but is not limited to, 1.5mm, 2mm, 2.5mm, 3mm, 3.5mm, 4mm, 4.5mm, 5mm, 5.5mm, 6mm, 6.7mm, 7mm, and the like. The lens assembly 100 of the present application is structured such that both a lens assembly 100 having a relatively small clear aperture can be obtained, and a lens assembly 100 having a relatively large clear aperture (e.g., greater than 4mm, greater than 6mm, etc.) can be obtained. In addition, when a camera with a large clear aperture is manufactured, the focal length of the lens assembly 100 is not reduced.

Optionally, the carrier layer 10 is light transmissive. The material of the carrier layer 10 may be, but is not limited to, at least one of Polycarbonate (PC), polymethyl methacrylate (PMMA), and glass. It is understood that the carrier layer 10 has a certain rigidity to provide sufficient support, and the rigidity of the carrier layer 10 does not change the shape of the first surface 11 at least when the zoom layer 30 is elastically deformed by being pressed.

Alternatively, the carrier layer 10 may be formed by molding, injection molding, or the like to obtain the first surface 11 with a predetermined shape. In addition, the carrier layer 10 may also be formed by forming the first surface 11 with a predetermined shape on the planar structure by using a Physical Vapor Deposition (PVD) or a Chemical Vapor Deposition (CVD) process.

Referring to fig. 2 and 3, the first surface 11 may be a spherical surface, an aspherical surface, or a free-form surface. Alternatively, the first surface 11 may be convex or concave. It is understood that when the first surface 11 is convex, the first surface 11 is convex toward the direction close to the zoom layer 30; when the first surface 11 is concave, the first surface 11 is concave toward a direction away from the zoom layer 30. By varying the surface type of the first surface 11, in combination with the control of the actuator 70, more types of lens assemblies 100 can be obtained, such as convex lenses with a light-gathering effect, and concave lenses with a diverging effect.

The term "aspherical" in this application refers to the face of a rotationally symmetric aspherical surface. The term "free-form surface" in this application refers to a non-rotationally symmetric aspheric surface.

Optionally, the first surface 11 is a convex surface or a concave surface at the optical axis, and the first surface 11 is a spherical surface, an aspheric surface, or a free-form surface.

Alternatively, when the first surface 11 is an aspheric surface, the aspheric surface may satisfy, but is not limited to, the following relation:

wherein z is the rise of the distance from the vertex of the aspheric surface (the vertex refers to the intersection point of the aspheric surface and the optical axis) when the aspheric surface is at the position with the height of r along the optical axis direction, r is the distance from the point on the aspheric surface to the vertex of the aspheric surface, C is the curvature of the aspheric surface, k is a cone coefficient, a is the 4 th order correction coefficient of the aspheric surface, B is the 6 th order correction coefficient of the aspheric surface, C is the 8 th order correction coefficient of the aspheric surface, D is the 10 th order correction coefficient of the aspheric surface, E is the 12 th order correction coefficient of the aspheric surface, F is the 14 th order correction coefficient of the aspheric surface, G is the 16 th order correction coefficient of the aspheric surface, H is the 18 th order correction coefficient of the aspheric surface, and J is the 20 th order correction coefficient of the aspheric surface.

Alternatively, when the first surface 11 is a free curved surface, the free curved surface may satisfy, but is not limited to, the following relation:

wherein z is the rise of the distance from a point with the height r to the vertex of the free-form surface (the intersection point of the point on the free-form surface and the optical axis) along the optical axis direction on the free-form surface, r is the distance from the point on the free-form surface to the vertex of the aspheric surface, c is the curvature of the free-form surface, k is the conic coefficient, ZP_jIs the jth Zernike polynomial, C_jIs ZP_jJ is an integer of 1 to 21. Wherein, the polynomial ZP_jThe expressions 1 to 21 are shown in the following table 1.

In some embodiments, the first surface 11 is convex at the optical axis and concave near the circumference (as shown in fig. 2); in other embodiments, the first surface 11 is convex at the optical axis and near the circumference. In still other embodiments, the first surface 11 is concave at the optical axis and convex near the circumference (as shown in FIG. 3). In still other embodiments, the first surface 11 is concave at the optical axis and near the circumference.

Optionally, when the first surface 11 is convex at the optical axis, the range of the curvature radius R1 of the first surface 11 is 20mm ≦ R1 ≦ 300 mm. Further, the range of the curvature radius R1 of the first surface 11 is 50mm ≦ R1 ≦ 150 mm. Specifically, the radius of curvature R1 of the first surface 11 may be, but is not limited to, 20mm, 30mm, 40mm, 50mm, 60mm, 70mm, 80mm, 100mm, 120mm, 140mm, 150mm, 160mm, 180mm, 200mm, 220mm, 240mm, 260mm, 280mm, 300mm, and the like. Too large a radius of curvature of the first surface 11 provides a lesser light gathering effect, low height along the optical axis, and less support; the radius of curvature of the first surface 11 is too small, excessive compensation of edge distortion becomes difficult at the time of imaging, and too high a convexity in the optical axis direction, the slope change is too steep, and the manufacturing difficulty increases.

Optionally, when the first surface 11 is concave at the optical axis, the range of the curvature radius R1 of the first surface 11 is 1mm ≦ R1 ≦ 300 mm. Further, the curvature radius R1 of the first surface 11 ranges from 1mm to R1 to 50 mm. Still further, the radius of curvature R1 of the first surface 11 ranges from 10mm ≦ R1 ≦ 30 mm. Specifically, the radius of curvature R1 of the first surface 11 may be, but is not limited to, 1mm, 3mm, 5mm, 10mm, 15mm, 20mm, 25mm, 30mm, 35mm, 40mm, 45mm, 50mm, 60mm, 70mm, 80mm, 100mm, 120mm, 140mm, 150mm, 160mm, 180mm, 200mm, 220mm, 240mm, 260mm, 280mm, 300mm, and the like. The radius of curvature of the first surface 11 is too large and the diopter power (i.e., optical power) that the first surface 11 can provide is too small; the radius of curvature of the first surface 11 is too small, excessive compensation of edge distortion becomes difficult at the time of imaging, and too high a convexity in the optical axis direction, the slope change is too steep, and the manufacturing difficulty increases.

Optionally, the zoom layer 30 is optically transparent. Alternatively, the material of the zoom layer 30 may include, but is not limited to, at least one of polydimethylsiloxane, polyurethane, fluorosilicone, elastomer polymerized from silicone oil, and the like.

While the material of zoom layer 30 may include, but is not limited to, at least one of polydimethylsiloxane, polyurethane, fluorosilicone, etc., the material of zoom layer 30 may further include aliphatic group of organic acid or inorganic acid to improve stability of zoom layer 30 and adjust the refractive index of zoom layer 30. In addition, the material of the zoom layer 30 may further include at least one of titanium dioxide, zirconium oxide, tin oxide, zinc oxide, etc., and titanium dioxide, zirconium oxide, tin oxide, zinc oxide may be used to change or adjust the refractive index of the zoom layer 30.

When the material of the zoom layer 30 includes an elastomer obtained by polymerizing silicone oil, the zoom layer 30 can be prepared by the following steps: the elastomer is prepared by adding a coupling agent (such as at least one of silane coupling agent, titanate coupling agent and borate coupling agent) in a certain proportion into silicone oil such as methyl silicone oil, phenyl silicone oil and hydroxyl silicone oil, and curing at high temperature or by light. The hardness or elasticity of the elastomer can be adjusted by the degree of crosslinking, which can be adjusted by the addition of a coupling agent.

Optionally, the flexible layer 50 is transparent, and in some embodiments, the material of the flexible layer 50 may include, but is not limited to, at least one of glass and resin.

Alternatively, the glass may be, but is not limited to, at least one of quartz glass, glass containing elements such as boron, phosphorus, and silicon, and glass containing elements such as Na and K. Alternatively, the glass may be at least one of a silicate glass, an aluminosilicate glass, a phosphate glass, an aluminophosphate glass, a borate glass. Alternatively, the glass may be, but is not limited to, Ultra Thin Glass (UTG), such as those available from schottky and corning, among others.

Alternatively, the resin may be, but is not limited to, at least one of Polymethylmethacrylate (PMMA), Polycarbonate (PC), and allyl diglycol dicarbonate. In some embodiments, the flexible layer 50 includes a base layer (not shown) and a silicon dioxide layer (not shown) stacked on the base layer, the base layer is a silicon or glass substrate, and the silicon dioxide layer is deposited on the surface of the base layer by Chemical Vapor Deposition (CVD).

Alternatively, the thickness of the flexible layer 50 may be 20 μm to 100 μm. In other words, the thickness of the flexible layer 50 in the optical axis direction. Specifically, the thickness of the flexible layer 50 may be, but is not limited to, 20 μm, 30 μm, 40 μm, 50 μm, 60 μm, 70 μm, 80 μm, 90 μm, 100 μm, and the like. In addition, the flexible layer 50 can be a glass layer with a thickness greater than 100 μm (e.g., 150 μm, 200 μm, etc.), which is prepared with an electrode layer and a piezoelectric material and then ground to a thickness of 20 μm to 100 μm. In the examples of the present application, when referring to the numerical ranges a to b, the endpoint values a are included and the endpoint values b are included, if not specifically indicated. For example, the thickness of the flexible layer 50 may be 20 μm to 100 μm, which means that the thickness of the flexible layer 50 may be any value between 20 μm to 100 μm, inclusive of the end point 20 μm and the end point 100 μm.

In some embodiments, the flexible layer 50 may be circular in shape; in other words, the shape of the flexible layer 50 along a cross-section perpendicular to the optical axis. The diameter of the flexible layer 50 may be 50mm to 300 mm. Specifically, the diameter of the flexible layer 50 may be, but is not limited to, 50mm, 60mm, 70mm, 80mm, 100mm, 120mm, 140mm, 160mm, 180mm, 200mm, 220mm, 240mm, 260mm, 280mm, 300mm, and the like.

Optionally, the flexible layer 50 has a second surface 51 remote from the zoom layer 30, and the radius of curvature R2 of the second surface 51 ranges from 50mm R2 mm 100mm when the actuator 70 is applied with a voltage. Specifically, the radius of curvature R2 of the second surface 51 may be, but is not limited to, 50mm, 55mm, 60mm, 65mm, 70mm, 75mm, 80mm, 85mm, 90mm, 95mm, 100 mm. When the radius of curvature of the second surface 51 is greater than 200mm, the light converging effect or the light diverging effect of the lens assembly 100 is too small, and when the radius of curvature of the second surface 51 is less than 50mm, the second surface 51 is too curved, and when the lens assembly is applied to the optical imaging system 200, the spherical aberration is too large, so that the edge distortion is increased.

Optionally, when the actuator 70 is loaded with a voltage, the second surface is spherical or aspherical, and the second surface is convex or concave at the optical axis.

In some embodiments, carrier layer 10, zoom layer 30, and flexible layer 50 are connected in sequence. In other words, carrier layer 10 is coupled to zoom layer 30, and zoom layer 30 is coupled to flexible layer 50. Therefore, when the flexible layer 50 is deformed in a bending manner, the zoom layer 30 can be deformed better along with the flexible layer 50, and the bearing layer 10, the zoom layer 30 and the flexible layer 50 are always abutted in sequence in the zooming process. That is to say, the side of the zoom layer 30 abutting the first surface 11 of the carrier layer 10, and the side of the flexible layer 50 abutting the zoom layer 30 remote from the carrier layer 10.

Optionally, the refractive index n1 of the carrier layer 10 is between 95% and 105% of the refractive index n2 of the zoom layer 30. In other words, the refractive index n1 of the carrier layer 10 is different from the refractive index n2 of the zoom layer 30 within a range of ± 5%. Specifically, the refractive index n1 of the carrier layer 10 may be, but is not limited to, 95% n2, 96% n2, 97% n2, 98% n2, 99% n2, n2, 101% n2, 102% n2, 103% n2, 104% n2, 105% n2, and the like. The closer the refractive index of the zoom layer 30 is to that of the carrier layer 10, the more convenient it is to form the lens assembly 100 with a single optical surface.

Alternatively, the refractive index n2 of the zoom layer 30 may be 1.1 to 2.0. Specifically, it may be, but not limited to, 1.1, 1.2, 1.3, 1.4, 1.5, 1.6, 1.7, 1.8, 1.9, 2.0, etc.

Optionally, the refractive index n3 of the flexible layer 50 is between 95% and 105% of the refractive index n2 of the zoom layer 30. In other words, the refractive index n3 of the flexible layer 50 is within ± 5% of the refractive index n2 of the zoom layer 30. In particular, the refractive index n3 of the flexible layer 50 may be, but is not limited to, 95% n2, 96% n2, 97% n2, 98% n2, 99% n2, n2, 101% n2, 102% n2, 103% n2, 104% n2, 105% n2, and the like. The closer the refractive index of the flexible layer 50 is to the refractive index of the carrier layer 10, the more convenient it is to form the lens assembly 100 with a single optical surface.

In some embodiments, actuator 70 may be, but is not limited to, at least one of a piezoelectric actuator 70, an electrostrictive actuator 70, and a magnetostrictive actuator 70. Alternatively, the actuator 70 is a ring-shaped structure, such as a circular ring-shaped structure. In some embodiments, an orthographic projection of actuator 70 on flexible layer 50 is disposed around an orthographic perimeter of zoom layer 30 on flexible layer 50. This may better avoid the actuator 70 from affecting the light path traveled by the light within the lens assembly 100.

Referring to fig. 2 and fig. 3, in some embodiments, the actuator 70 includes a first driving component 71, the first driving component 71 is disposed on a side of the flexible layer 50 away from the zoom layer 30 (i.e., a side of the second surface 51), and when a voltage is applied to the first driving component 71, the flexible layer 50 is driven to deform, so as to drive the zoom layer 30 to elastically deform, so as to change the focal length of the lens assembly 100.

Optionally, the first driving component 71 is at least one of a piezoelectric driving component, an electrostrictive driving component and a magnetostrictive driving component. Optionally, the first driving assembly 71 has a ring structure, for example, the first driving assembly 71 has a ring structure. It is understood that the orthographic projection of the first driving assembly 71 on the flexible layer 50 is a ring-shaped structure.

Referring to fig. 4 and 5, in some embodiments, the first driving element 71 includes a first electrode 711, an actuation layer 713, and a second electrode 715, which are sequentially stacked. The first electrode 711 of the first driving element 71 is further away from the flexible layer 50 than the second electrode 715 of the first driving element 71. The first electrode 711 and the second electrode 715 are used for applying a voltage to deform the actuation layer 713 by stretching, thereby driving the flexible layer 50 to bend.

Alternatively, the first electrode 711 may be a positive electrode or a negative electrode; the second electrode 715 may be a positive electrode or a negative electrode. In some embodiments, the first electrode 711 is a positive electrode and the second electrode 715 is a negative electrode. In other embodiments, the first electrode 711 is a negative electrode and the second electrode 715 is a positive electrode.

Alternatively, the material of the first electrode 711 may be, but is not limited to, at least one of platinum, silver, gold, copper, Indium Tin Oxide (ITO), and the like. The material of the second electrode 715 may be, but is not limited to, at least one of platinum, silver, gold, copper, Indium Tin Oxide (ITO), and the like. The material of the first electrode 711 may be the same as or different from that of the second electrode 715, and the present application is not particularly limited.

Optionally, the material of the actuation layer 713 may be, but is not limited to, at least one of a piezoelectric material, an electrostrictive material, and a magnetostrictive material. Alternatively, the piezoelectric material may be, but is not limited to, lead zirconate titanate (PZT), a polyvinylidene fluoride piezoelectric thin film (PVDF piezoelectric film), a dielectric elastomer, a relaxor ferroelectric single crystal [ Pb (Mg)_1/3Nb_2/3)O₃-PbTiO₃，PMN-PT]Samarium-doped PMN-PT Single Crystal, xpB (In)_1/2Nb_1/2)O3-yPb(Mg_1/2Nb_2/3)O₃-(1-x-y)PbTiO₃(wherein x is 0.24 to 0.26, y is 0.43 to 0.45, PIMNT single crystal), and the like. The electrostrictive material may be, but is not limited to, lead magnesium niobate, and the like. The magnetostrictive material may be, but is not limited to, a ferrite magnetostrictive material, such as at least one of a nickel-cobalt ferrite material, a nickel-cobalt-copper ferrite material, and the like.

Alternatively, the actuation layer 713 may have a thickness of 1 μm to 100 μm. Specifically, the thickness of the actuation layer 713 may be, but is not limited to, 1 μm, 2 μm, 3 μm, 4 μm, 5 μm, 8 μm, 10 μm, 15 μm, 20 μm, 30 μm, 40 μm, 50 μm, 60 μm, 70 μm, 80 μm, 90 μm, 100 μm, and the like. When the material of the actuation layer 713 is lead zirconate titanate, the actuation layer 713 may be formed directly on the flexible layer 50 by a sol-gel method, a magnetron sputtering method, or the like. In other embodiments, the first driving assembly 71 may be formed first and then bonded to the flexible layer 50 by an adhesive such as a hot melt adhesive, a photo-curing adhesive, an optical adhesive, etc.

Referring to fig. 6 and 7, in other embodiments, the actuator 70 includes a first driving component 71 and a second driving component 73, the first driving component 71 is disposed on a side of the flexible layer 50 away from the zoom layer 30, the second driving component 73 is disposed on a side of the flexible layer 50 facing the zoom layer 30, and when a voltage is applied to at least one of the first driving component 71 and the second driving component 73, the flexible layer 50 is driven to deform, so as to drive the zoom layer 30 to elastically deform, thereby implementing a focal length change of the lens assembly 100. Compared to the embodiment with only the first driving element 71 in fig. 2 and 3, the embodiment of fig. 6 and 7 of the present application has the first driving element 71 and the second driving element 73 respectively disposed on opposite sides of the flexible layer 50, so that when the actuator 70 is activated, the flexible layer 50 of the lens assembly 100 can have a larger bending degree (i.e. a smaller curvature radius), and thus a larger focal power and a larger focal length variation range. For a detailed description of the same parts of the first driving assembly 71 as those of the above embodiment, please refer to the description of the corresponding parts of the above embodiment, which is not repeated herein.

Optionally, the first driving assembly 71 and the second driving assembly 73 are coaxially disposed, and orthographic projections of the first driving assembly 71 and the second driving assembly 73 on the flexible layer 50 at least partially overlap.

Optionally, the second driving assembly 73 is at least one of a piezoelectric driving assembly, an electrostrictive driving assembly, and a magnetostrictive driving assembly. Optionally, the second driving assembly 73 is a ring-shaped structure, for example, the second driving assembly 73 is a ring-shaped structure. It will be appreciated that the orthographic projection of the second drive assembly 73 on the flexible layer 50 is an annular structure.

Referring to fig. 5 again, in some embodiments, the second driving assembly 73 includes a first electrode 711, an actuating layer 713, and a second electrode 715, which are sequentially stacked. The first electrode 711 of the second driving element 73 is closer to the flexible layer 50 than the second electrode 715 of the second driving element 73. The first electrode 711 and the second electrode 715 are used for applying a voltage to deform the actuation layer 713 such as stretching, thereby driving the flexible layer 50 to bend. For a detailed description of the first electrode 711, the actuation layer 713, and the second electrode 715, reference is made to the description of the corresponding portions, which is not repeated herein.

Alternatively, the first driving assembly 71 and the second driving assembly 73 may have the same structure and material, or may have different structures and materials. In some embodiments, the first driving element 71 and the second driving element 73 are piezoelectric driving elements. In other embodiments, the first driving assembly 71 and the second driving assembly 73 are both electrostrictive driving assemblies. In still other embodiments, the first driving element 71 is a piezoelectric driving element, and the second driving element 73 is an electrostrictive driving element. In still other embodiments, the first driving element 71 is an electrostrictive driving element, and the second driving element 73 is a piezoelectric driving element. In still other embodiments, the first driving element 71 and the second driving element 73 are both magnetostrictive driving elements. In still other embodiments, the first driving element 71 is a piezoelectric driving element and the second driving element 73 is a magnetostrictive driving element. In still other embodiments, the first drive assembly 71 is an electrostrictive drive assembly and the second drive assembly 73 is a magnetostrictive drive assembly.

In some embodiments, carrier layer 10, zoom layer 30, flexible layer 50, and actuator 70 are coaxially disposed and all have an optical axis of lens assembly 100 as an axis of symmetry.

How the lens assembly 100 achieves zooming is further described below in various control manners.

Referring to fig. 8, in some embodiments, the first surface 11 is convex at the optical axis, and when the first driving element 71 is applied with a voltage to generate a first electric field E1 and the second driving element 73 is applied with a voltage to generate a second electric field E2, the second surface 51 is spherical and convex toward a direction away from the zoom layer 30, wherein the direction of the first electric field is directed from a side of the first driving element 71 away from the flexible layer 50 to a side of the first driving element 71 close to the flexible layer 50 (as shown by an arrow E1 in fig. 8); the direction of the second electric field is from the side of the second driving component 73 facing away from the flexible layer 50 to the side of the second driving component 73 close to the flexible layer 50 (as shown by arrow E2 in fig. 8). At this time, the state of the lens assembly 100 is referred to as a first state.

Specifically, when the first driving assembly 71 is loaded with a voltage to generate a first electric field, and the second driving assembly 73 is loaded with a voltage to generate a second electric field, the first driving assembly 71 stretches the second surface 51 of the flexible layer 50 under the action of the first electric field, and the second driving assembly 73 compresses the surface of the flexible layer 50 away from the second surface 51 under the action of the second electric field, so that the second surface 51 of the flexible layer 50 is subjected to a tensile force (as shown by an arrow a in fig. 8), the surface of the flexible layer 50 away from the second surface 51 is subjected to a compressive force (as shown by an arrow b in fig. 8), and finally the flexible layer 50 is subjected to bending deformation under the combined action of the tensile force of the first driving assembly 71 and the compressive force of the second driving assembly 73, and the second surface 51 is spherical and protrudes toward a direction away from the zoom layer 30. After the flexible layer 50 is bent and deformed, the zooming layer 30 is pressed to be elastically deformed, so that the flexible layer 50, the zooming layer 30 and the bearing layer 10 are mutually matched to form the convex lens with the light-gathering effect. Therefore, by controlling the strength of the first electric field and the second electric field, the magnitude of the tensile force generated by the first driving component 71 and the magnitude of the compressive force generated by the second driving component 73 can be adjusted, so as to adjust the bending degree of the flexible layer 50 (or the curvature radius of the second surface 51), further adjust the deflection direction of the light after sequentially passing through the flexible layer 50, the zoom layer 30 and the bearing layer 10, and further adjust the parameters such as the focal length and the focal power of the lens assembly 100.

In the embodiment of fig. 8, the voltage applied by the first driving assembly 71 to generate the first electric field E1 can be realized by one of the following ways: for example, the first electrode 711 of the first driving element 71 is applied with a positive voltage of 50V, and the second electrode 715 of the first driving element 71 is applied with a voltage of 0V (i.e. grounded), so as to generate a first electric field E1 directed from the side of the first driving element 71 facing away from the flexible layer 50 to the side of the first driving element 71 close to the flexible layer 50. For another example, the first electrode 711 of the first driving element 71 is applied with a positive voltage of 80V, and the second electrode 715 of the first driving element 71 is applied with a positive voltage of 30V, so as to generate a first electric field E1 directed from the side of the first driving element 71 facing away from the flexible layer 50 to the side of the first driving element 71 close to the flexible layer 50. For another example, the first electrode 711 of the first driving element 71 is applied with a voltage of 0V (i.e. grounded), the second electrode 715 of the first driving element 71 is applied with a negative voltage of-50V, so as to generate a first electric field E1 directed from the side of the first driving element 71 facing away from the flexible layer 50 to the side of the first driving element 71 close to the flexible layer 50, and so on. The positive, negative and numerical values of the voltages applied to the first electrode 711 of the first driving element 71 and the second electrode 715 of the first driving element 71 can be designed according to the surface shape, the curvature radius, and the like of the second surface 51, and the present application is not limited in particular.

In the embodiment of fig. 8, the application of the voltage by the second driving component 73 to generate the second electric field E2 can be realized by one of the following methods: for example, the first electrode 711 of the second driving element 73 is applied with a voltage of 0V (i.e. grounded), and the second electrode 715 of the second driving element 73 is applied with a voltage of 50V, so as to generate a second electric field E2 which is directed from the side of the second driving element 73 facing away from the flexible layer 50 to the side of the second driving element 73 close to the flexible layer 50. For another example, the first electrode 711 of the second driving component 73 is applied with a positive voltage of 30V, and the second electrode 715 of the second driving component 73 is applied with a positive voltage of 80V, so as to generate a second electric field E2 directed from the side of the second driving component 73 facing away from the flexible layer 50 to the side of the second driving component 73 close to the flexible layer 50. For another example, the first electrode 711 of the second driving element 73 is applied with a negative voltage of-50V, the second electrode 715 of the second driving element 73 is applied with a voltage of 0V (i.e., grounded), so as to generate a second electric field E2 directed from the side of the second driving element 73 away from the flexible layer 50 to the side of the second driving element 73 close to the flexible layer 50, and so on. The positive, negative and numerical values of the voltages applied to the first electrode 711 of the second driving assembly 73 and the second electrode 715 of the first driving assembly 71 can be designed according to the surface shape, the curvature radius, and the like of the second surface 51, and the present application is not limited in particular.

Referring to fig. 9, in some embodiments, the first surface 11 is convex at the optical axis, when the first driving element 71 applies a voltage to generate a third electric field E3, and the second driving element 73 applies a voltage to generate a fourth electric field E4, the second surface 51 is aspheric, and the second surface 51 protrudes away from the zoom layer 30 at the optical axis, wherein the direction of the third electric field is directed from the side of the first driving element 71 close to the flexible layer 50 to the side of the first driving element 71 away from the flexible layer 50 (as shown by an arrow E3 in fig. 9); the direction of the fourth electric field is directed from the side of the second driving component 73 facing away from the flexible layer 50 to the side of the second driving component 73 close to the flexible layer 50 (as shown by arrow E4 in fig. 9). At this time, the state of the lens assembly 100 is referred to as a second state.

Specifically, when the first driving assembly 71 is applied with a voltage to generate a third electric field and the second driving assembly 73 is applied with a voltage to generate a fourth electric field, the first driving assembly 71 compresses the second surface 51 of the flexible layer 50 under the action of the first electric field, and the second driving assembly 73 compresses the surface of the flexible layer 50 away from the second surface 51 under the action of the second electric field, so that the second surface 51 of the flexible layer 50 is subjected to a compressive force (as shown by an arrow a in fig. 9), the surface of the flexible layer 50 away from the second surface 51 is also subjected to a compressive force (as shown by an arrow b in fig. 9), and finally the flexible layer 50 is subjected to bending deformation under the combined action of the compressive force of the first driving assembly 71 and the compressive force of the second driving assembly 73, and the second surface 51 is aspheric and protrudes in a direction away from the zoom layer 30. After the flexible layer 50 is bent and deformed, the flexible layer 50 presses the zooming layer 30 to be elastically deformed, so that the flexible layer 50, the zooming layer 30 and the carrier layer 10 cooperate with each other to form an aspheric convex lens with a light-focusing effect. The direction of the first electric field E1 is the same as the direction of the second electric field E2, and the directions of the first electric field E1 and the second electric field E2 are both from the zoom layer 30 toward the flexible layer 50 along the optical axis. Therefore, by controlling the intensity of the first electric field and the second electric field, the magnitude of the compressive force generated by the first driving component 71 and the magnitude of the compressive force generated by the second driving component 73 can be adjusted, so as to adjust the bending degree of the flexible layer 50 (or the curvature radius of the second surface 51), further adjust the deflection direction of the light after sequentially passing through the flexible layer 50, the zoom layer 30 and the bearing layer 10, and further adjust the parameters of the lens assembly 100, such as the focal length and the focal power.

In the embodiment of fig. 9, the voltage applied by the first driving assembly 71 to generate the third electric field E3 can be realized by one of the following methods: for example, the first electrode 711 of the first driving element 71 is applied with a voltage of 0V (i.e. grounded), and the second electrode 715 of the first driving element 71 is applied with a positive voltage of 50V, so as to generate a third electric field E3 directed from the side of the first driving element 71 close to the flexible layer 50 to the side of the first driving element 71 away from the flexible layer 50. For another example, the first electrode 711 of the first driving element 71 is loaded with a positive voltage of 30V, and the second electrode 715 of the first driving element 71 is loaded with a positive voltage of 80V, so as to generate a third electric field E3 directed from the side of the first driving element 71 close to the flexible layer 50 to the side of the first driving element 71 away from the flexible layer 50. For another example, the first electrode 711 of the first driving element 71 is applied with a negative voltage of-50V, the second electrode 715 of the first driving element 71 is applied with a voltage of 0V (i.e. grounded), so as to generate a third electric field E3 directed from the side of the first driving element 71 close to the flexible layer 50 to the side of the first driving element 71 away from the flexible layer 50, and so on. The positive, negative and numerical values of the voltages applied to the first electrode 711 of the first driving element 71 and the second electrode 715 of the first driving element 71 can be designed according to the surface shape, the curvature radius, and the like of the second surface 51, and the present application is not limited in particular.

In the embodiment of fig. 9, the fourth electric field E4 generated by the second driving component 73 applying voltage can be realized by one of the following methods: for example, the first electrode 711 of the second driving element 73 is applied with a voltage of 0V (i.e. grounded), and the second electrode 715 of the second driving element 73 is applied with a voltage of 50V, so as to generate a fourth electric field E4 directed from the side of the second driving element 73 facing away from the flexible layer 50 to the side of the second driving element 73 close to the flexible layer 50. For another example, the first electrode 711 of the second driving component 73 is applied with a positive voltage of 30V, and the second electrode 715 of the second driving component 73 is applied with a positive voltage of 80V, so as to generate a fourth electric field E4 directed from the side of the second driving component 73 facing away from the flexible layer 50 to the side of the second driving component 73 close to the flexible layer 50. For another example, the first electrode 711 of the second driving element 73 is applied with a negative voltage of-50V, the second electrode 715 of the second driving element 73 is applied with a voltage of 0V (i.e. grounded), so as to generate a fourth electric field E4, etc. from the side of the second driving element 73 facing away from the flexible layer 50 to the side of the second driving element 73 close to the flexible layer 50. The positive, negative and numerical values of the voltages applied to the first electrode 711 of the second driving assembly 73 and the second electrode 715 of the first driving assembly 71 can be designed according to the surface shape, the curvature radius, and the like of the second surface 51, and the present application is not limited in particular.

In one embodiment, the first surface 11 is convex at the optical axis, and the lens assembly 100 has a first focal length when neither the first driving assembly 71 nor the second driving assembly 73 is applied with a voltage; when the first driving component 71 is applied with a voltage to generate a first electric field and the second driving component 73 is applied with a voltage to generate a second electric field, the lens assembly 100 has a second focal length; when the first driving assembly 71 is applied with a voltage to generate a third electric field and the second driving assembly 73 is applied with a voltage to generate a fourth electric field, the lens assembly 100 has a third focal length, and the first focal length, the second focal length and the third focal length are different from each other. Therefore, by controlling the positive, negative and magnitude of the voltages loaded on the first driving assembly 71 and the second driving assembly 73, the lens assembly 100 can have different focal lengths, so that zooming can be performed in a larger focal length range, and application requirements of more shooting scenes can be met.

Referring to fig. 10, in some embodiments, the first surface 11 is concave at the optical axis, the flexible layer 50 has a second surface 51 far away from the zoom layer 30, when the first driving element 71 is applied with a voltage to generate a first electric field, and the second driving element 73 is applied with a voltage to generate a second electric field, the second surface 51 is spherical, and the second surface 51 is concave at the optical axis toward the zoom layer 30, wherein the direction of the first electric field is directed from the side of the first driving element 71 close to the flexible layer 50 to the side of the first driving element 71 away from the flexible layer 50 (as shown by an arrow E1 in fig. 10); the direction of the second electric field is directed from the side of the second driving assembly 73 close to the flexible layer 50 to the side of the second driving assembly 73 away from the flexible layer 50 (as shown by arrow E2 in fig. 10). At this time, the state of the lens assembly 100 is referred to as a third state.

Specifically, when the first driving component 71 is loaded with a voltage to generate a first electric field, and the second driving component 73 is loaded with a voltage to generate a second electric field, the first driving component 71 compresses the second surface 51 of the flexible layer 50 under the action of the first electric field, and the second driving component 73 stretches the surface of the flexible layer 50 away from the second surface 51 under the action of the second electric field, so that the second surface 51 of the flexible layer 50 is subjected to a compressive force (as shown by arrow a in fig. 10), the surface of the flexible layer 50 away from the second surface 51 is subjected to a tensile force (as shown by arrow b in fig. 10), and finally the flexible layer 50 is subjected to a bending deformation under the combined action of the compressive force of the first driving component 71 and the tensile force of the second driving component 73, and the second surface 51 is spherical and concaved toward the direction close to the zoom layer 30. After the flexible layer 50 is deformed by bending, the zoom layer 30 is pressed to deform elastically, so that the flexible layer 50, the zoom layer 30 and the carrier layer 10 cooperate with each other to form a concave lens with a diverging effect. Wherein the direction of the first electric field E1 is opposite to the direction of the second electric field E2, the direction of the first electric field E1 is along the optical axis from the zoom layer 30 towards the flexible layer 50, and the direction of the second electric field E2 is along the optical axis from the flexible layer 50 towards the zoom layer 30. Therefore, by controlling the intensities of the first electric field and the second electric field, the magnitudes of the compressive force generated by the first driving component 71 and the tensile force generated by the second driving component 73 can be adjusted, so as to adjust the bending degree of the flexible layer 50 (or the curvature radius of the second surface 51), further adjust the deflection direction of the light after sequentially passing through the flexible layer 50, the zoom layer 30 and the bearing layer 10, and further adjust the parameters such as the focal length and the focal power of the lens assembly 100.

In the embodiment of fig. 10, the voltage applied by the first driving component 71 to generate the first electric field E1 can be realized by one of the following methods: for example, the first electrode 711 of the first driving element 71 is applied with a voltage of 0V (i.e. grounded), and the second electrode 715 of the first driving element 71 is applied with a positive voltage of 50V, so as to generate a first electric field E1 directed from the side of the first driving element 71 close to the flexible layer 50 to the side of the first driving element 71 away from the flexible layer 50. For another example, the first electrode 711 of the first driving element 71 is applied with a positive voltage of 30V, and the second electrode 715 of the first driving element 71 is applied with a positive voltage of 80V, so as to generate a first electric field E1 directed from the side of the first driving element 71 close to the flexible layer 50 to the side of the first driving element 71 away from the flexible layer 50. For another example, the first electrode 711 of the first driving element 71 is applied with a negative voltage of-50V, the second electrode 715 of the first driving element 71 is applied with a voltage of 0V (i.e., grounded), so as to generate a first electric field E1 directed from the side of the first driving element 71 close to the flexible layer 50 to the side of the first driving element 71 away from the flexible layer 50, and so on. The positive, negative and numerical values of the voltages applied to the first electrode 711 of the first driving assembly 71 and the second electrode 715 of the first driving assembly 71 can be designed according to the shape of the second surface 51, the radius of curvature, and the like, and the present application is not limited in particular.

In the embodiment of fig. 10, the application of the voltage by the second driving component 73 to generate the second electric field E2 can be realized by one of the following methods: for example, the first electrode 711 of the second driving element 73 is applied with a voltage of 50V, and the second electrode 715 of the second driving element 73 is applied with a voltage of 0V (i.e. grounded), so as to generate a second electric field E2 which is directed from the side of the second driving element 73 close to the flexible layer 50 to the side of the second driving element 73 away from the flexible layer 50. For another example, the first electrode 711 of the second driving component 73 is applied with a positive voltage of 80V, and the second electrode 715 of the second driving component 73 is applied with a positive voltage of 50V, so as to generate a second electric field E2 directed from the side of the second driving component 73 close to the flexible layer 50 to the side of the second driving component 73 away from the flexible layer 50. For another example, the first electrode 711 of the second driving element 73 is applied with a voltage of 0V (i.e. grounded), the second electrode 715 of the second driving element 73 is applied with a negative voltage of-50V, so as to generate a second electric field E2, etc. from the side of the second driving element 73 close to the flexible layer 50 to the side of the second driving element 73 away from the flexible layer 50. The positive, negative and numerical values of the voltages applied to the first electrode 711 of the second driving assembly 73 and the second electrode 715 of the first driving assembly 71 can be designed according to the surface shape, the curvature radius, and the like of the second surface 51, and the present application is not limited in particular.

Referring to fig. 11, in some embodiments, the first surface 11 is concave at the optical axis, the flexible layer 50 has a second surface 51 far away from the zoom layer 30, when the first driving element 71 is applied with a voltage to generate a third electric field, and the second driving element 73 is applied with a voltage to generate a fourth electric field, the second surface 51 is aspheric, and the second surface 51 is concave toward the direction close to the zoom layer 30 at the optical axis, wherein the direction of the third electric field is directed from the side of the first driving element far away from the flexible layer to the side of the first driving element close to the flexible layer (as shown by an arrow E3 in fig. 11); the direction of the fourth electric field is directed from the side of the second driving component near the flexible layer to the side of the second driving component facing away from the flexible layer (as shown by arrow E4 in fig. 11). At this time, the state of the lens assembly 100 is referred to as a fourth state.

Specifically, when the first driving component 71 is loaded with a voltage to generate a third electric field and the second driving component 73 is loaded with a voltage to generate a fourth electric field, the first driving component 71 stretches the second surface 51 of the flexible layer 50 under the action of the first electric field, and the second driving component 73 stretches the surface of the flexible layer 50 away from the second surface 51 under the action of the second electric field, so that the second surface 51 of the flexible layer 50 is subjected to a stretching force (as shown by an arrow a in fig. 11), the surface of the flexible layer 50 away from the second surface 51 is also subjected to a stretching force (as shown by an arrow b in fig. 11), and finally the flexible layer 50 is subjected to bending deformation under the combined action of the stretching force of the first driving component 71 and the stretching force of the second driving component 73, and the second surface 51 is aspheric and concaved toward the direction close to the zoom layer 30. After the flexible layer 50 is deformed by bending, the flexible layer 50 presses the zoom layer 30 to deform elastically, so that the flexible layer 50, the zoom layer 30 and the carrier layer 10 cooperate with each other to form an aspheric concave lens with a diverging function. The direction of the first electric field E1 is the same as the direction of the second electric field E2, and the directions of the first electric field E1 and the second electric field E2 are both from the flexible layer 50 toward the zoom layer 30 along the optical axis. Therefore, by controlling the intensities of the first electric field and the second electric field, the magnitudes of the stretching force generated by the first driving component 71 and the stretching force generated by the second driving component 73 can be adjusted, so as to adjust the bending degree of the flexible layer 50 (or the curvature radius of the second surface 51), further adjust the deflection direction of the light after sequentially passing through the flexible layer 50, the zoom layer 30 and the bearing layer 10, and further adjust the parameters such as the focal length and the focal power of the lens assembly 100.

In the embodiment of fig. 11, the voltage applied by the first driving assembly 71 to generate the third electric field E3 can be realized by one of the following methods: for example, the first electrode 711 of the first driving element 71 is applied with a positive voltage of 50V, and the second electrode 715 of the first driving element 71 is applied with a voltage of 0V (i.e. grounded), so as to generate a third electric field E3 directed from the side of the first driving element 71 facing away from the flexible layer 50 to the side of the first driving element 71 close to the flexible layer 50. For another example, the first electrode 711 of the first driving element 71 is applied with a positive voltage of 80V, and the second electrode 715 of the first driving element 71 is applied with a positive voltage of 30V, so as to generate a third electric field E3 directed from the side of the first driving element 71 facing away from the flexible layer 50 to the side of the first driving element 71 close to the flexible layer 50. For another example, the first electrode 711 of the first driving element 71 is applied with a voltage of 0V (i.e. grounded), the second electrode 715 of the first driving element 71 is applied with a negative voltage of-50V, so as to generate a third electric field E3, etc. from the side of the first driving element 71 facing away from the flexible layer 50 to the side of the first driving element 71 close to the flexible layer 50. The positive, negative and numerical values of the voltages applied to the first electrode 711 of the first driving assembly 71 and the second electrode 715 of the first driving assembly 71 can be designed according to the shape of the second surface 51, the radius of curvature, and the like, and the present application is not limited in particular.

In the embodiment of fig. 11, the application of the voltage to the second driving assembly 73 to generate the fourth electric field E4 can be realized by one of the following ways: for example, the first electrode 711 of the second driving element 73 is applied with a voltage of 50V, and the second electrode 715 of the second driving element 73 is applied with a voltage of 0V (i.e. grounded), so as to generate a fourth electric field E4 directed from the side of the second driving element 73 close to the flexible layer 50 to the side of the second driving element 73 away from the flexible layer 50. For another example, the first electrode 711 of the second driving component 73 is applied with a positive voltage of 80V, and the second electrode 715 of the second driving component 73 is applied with a positive voltage of 50V, so as to generate a fourth electric field E4 directed from the side of the second driving component 73 close to the flexible layer 50 to the side of the second driving component 73 away from the flexible layer 50. For another example, the first electrode 711 of the second driving element 73 is applied with a voltage of 0V (i.e. grounded), the second electrode 715 of the second driving element 73 is applied with a negative voltage of-50V, so as to generate a fourth electric field E4, etc. from the side of the second driving element 73 close to the flexible layer 50 to the side of the second driving element 73 away from the flexible layer 50. The positive, negative and numerical values of the voltages applied to the first electrode 711 of the second driving assembly 73 and the second electrode 715 of the first driving assembly 71 can be designed according to the surface shape, the curvature radius, and the like of the second surface 51, and the present application is not limited in particular.

In one embodiment, the first surface 11 is concave at the optical axis, and the lens assembly 100 has a first focal length when neither the first driving element 71 nor the second driving element 73 is applied with a voltage; when the first driving assembly 71 is applied with a voltage to generate a first electric field and the second driving assembly 73 is applied with a voltage to generate a second electric field, the lens assembly 100 has a second focal length; when the first driving assembly 71 is applied with a voltage to generate a third electric field and the second driving assembly 73 is applied with a voltage to generate a fourth electric field, the lens assembly 100 has a third focal length, and the first focal length, the second focal length and the third focal length are different from each other. Therefore, by controlling the positive, negative and magnitude of the voltages loaded on the first driving assembly 71 and the second driving assembly 73, the lens assembly 100 can have different focal lengths, so that zooming can be performed in a larger focal length range, and application requirements of more shooting scenes can be met.

Referring to fig. 12 and 13, in some embodiments, the lens assembly 100 further includes a support 90, the support 90 is disposed on a side of the flexible layer 50 facing away from the zoom layer 30 and surrounds an outer periphery of the zoom layer 30, and the support 90 is connected to at least one of the flexible layer 50 and the carrier layer 10 for supporting the flexible layer 50. The supporting member 90 can support the flexible layer 50 and the zoom layer 30 more stably, so that the flexible layer 50 and the zoom layer 30 deform, and when zooming, the zooming process can be smoother, and furthermore, when no voltage is applied, the supporting member 90 can prevent the flexible layer 50 from pressing the zoom layer 30 under the action of gravity, so that the zoom layer 30 deforms, and thus, the overall structure of the lens assembly 100 can be more stable.

The supporting member 90 is connected to at least one of the flexible layer 50 and the carrier layer 10, and optionally, the supporting member 90 is connected to the flexible layer 50 (as shown in fig. 12 or 13); alternatively, the supporting member 90 is connected to the bearing layer 10, and the supporting member 90 abuts against the flexible layer 50 (i.e. the supporting member 90 is in contact with the flexible layer 50, but not connected, i.e. not connected); alternatively, the supporting member 90 is connected to the flexible layer 50 and the carrying layer 10 respectively (as shown in fig. 14).

In some embodiments, when the supporting member 90 is connected to the flexible layer 50, the supporting member 90 may be connected to the flexible layer 50 by an adhesive such as a hot melt adhesive, a photo-curable adhesive (UV adhesive), an optical adhesive (OCA adhesive), or the like.

In some embodiments, when the supporting member 90 is connected to the bearing layer 10, the supporting member 90 and the bearing layer 10 may be connected by an adhesive such as a hot melt adhesive, a photo-curable adhesive (UV adhesive), an optical adhesive (OCA adhesive), or the like. Referring to fig. 14, in other embodiments, the supporting member 90 and the supporting layer 10 may also be an integral structure, and the supporting member 90 and the supporting layer 10 are integrally formed by injection molding, at this time, both the supporting layer 10 and the supporting member 90 are transparent.

Alternatively, the material of the supporting member 90 may be, but not limited to, silicon (e.g., single crystal silicon, polysilicon), silicon dioxide, glass, resin, metal, etc. The glass may be at least one of quartz glass, glass containing elements such as boron, phosphorus, and silicon, and glass containing elements such as Na and K. Alternatively, the glass may be at least one of a silicate glass, an aluminosilicate glass, a phosphate glass, an aluminophosphate glass, a borate glass. The resin may be, but is not limited to, at least one of Polymethylmethacrylate (PMMA), Polycarbonate (PC), LIQUID CRYSTAL POLYMER (LCP), and the like. The metal may be, but is not limited to, stainless steel.

As shown in FIG. 14, in one embodiment, lens assembly 100 includes carrier layer 10, support 90, zoom layer 30, flexible layer 50, and actuator 70. The carrier layer 10 is connected to the support 90, and the carrier layer 10 and the support 90 enclose an accommodation space, and the zoom layer 30 is disposed on the first surface 11 of the carrier layer 10 and located in the accommodation space. The flexible layer 50 is disposed on a side of the zoom layer 30 away from the carrier layer 10, and abuts against the support 90. The actuator 70 includes a first driving component 71 and a second driving component 73, the first driving component 71 is disposed on the second surface 51 of the flexible layer 50, and the second driving component 73 is disposed on a surface of the flexible layer 50 away from the second surface 51 and located in the accommodating space. The carrier layer 10, the supporting member 90, the zoom layer 30, the flexible layer 50, the first driving assembly 71, and the second driving assembly 73 are coaxially disposed with the optical axis as a symmetry axis.

Referring to fig. 15 and fig. 16, an embodiment of the present application further provides an optical imaging system 200 for imaging, which includes: lens assembly 100 of an embodiment of the present application. The optical imaging system 200 has an object side and an image side, and the flexible layer 50 of the lens assembly 100 is closer to the object side of the optical imaging system 200 than the zoom layer 30.

In some embodiments, the optical imaging system 200 of the present application further comprises a non-zoom lens 210, the non-zoom lens 210 being disposed coaxially with the lens assembly 100 along the optical axis. The non-zoom lens 210 may be disposed on the object side of the lens assembly 100, or may be disposed on the image side of the lens assembly 100. The non-zoom lens 210 may be a glass lens or a plastic lens. Alternatively, the number of non-zoom lenses 210 may be, but is not limited to, 1, 2, 3, 4, 5, 6, 7, etc.

Referring to fig. 17, optionally, the optical imaging system 200 of the present application further includes a stop 230, and the stop 230 may be disposed between the object-side surface of the first lens to the image-side surface of the last lens of the optical imaging system 200. The position of the diaphragm 230 can be adjusted according to actual needs, and the application is not limited in particular.

Optionally, the optical imaging system 200 of the present application further includes an infrared cut filter 250, where the infrared cut filter 250 is disposed at the image side of the last lens, and is configured to filter out light in other wavelength bands except for visible light, so as to improve the imaging quality of the optical imaging system 200. Alternatively, the infrared cut filter 250 may be made of glass.

Referring to fig. 18, optionally, the optical imaging system 200 further includes an image forming surface 260, and the optical imaging system 200 further includes a protective sheet 270, where the protective sheet 270 is located between the infrared cut filter 250 and the image forming surface 260, and is used for protecting the photosensitive elements located on the image forming surface 260, so as to achieve a dustproof effect. Alternatively, the protective sheet 270 may be a glass protective sheet 270, or may be a plastic protective sheet 270.

It is understood that the lens assembly 100, the non-zoom lens 210, the stop 230, the infrared cut filter 250, and the protective sheet 270 are coaxially disposed with the optical axis as an axis.

Referring to fig. 19, the present embodiment further provides a camera module 300, which includes the optical imaging system 200 of the present embodiment; and a photosensitive element 310, wherein the photosensitive element 310 is located at the image side of the optical imaging system 200. Optionally, the photosensitive element 310 is located at the imaging surface 260 of the optical imaging system 200.

The photosensitive element 310 is also called an image sensor, and the photosensitive element 310 may be, but not limited to, at least one of a Charge Coupled Device (CCD) and a complementary metal-oxide semiconductor (cmos) sensor.

Optionally, the camera module 300 further includes a lens barrel 330, the lens barrel 330 has a receiving cavity 331, the receiving cavity 331 is used for receiving the optical imaging system 200, and the photosensitive element 310 is disposed on the lens barrel 330.

Referring to fig. 20 to fig. 22, an embodiment of the present application further provides an electronic device 400, which includes: the camera module 300 according to the embodiment of the present application is configured to capture an image; a display module 410 for displaying the image shot by the camera module 300; and a circuit board module 430, wherein the circuit board module 430 is electrically connected to the camera module 300 and the display module 410, respectively, and is used for controlling the camera module 300 to shoot and the display module 410 to display.

The electronic device 400 of the present application may be, but is not limited to, an electronic device 400 having a photographing function, such as a camera, a camera phone, a drive recorder, a vehicle-mounted camera, a tablet computer, a notebook computer, a desktop computer, an intelligent bracelet, an intelligent watch, an electronic reader, intelligent glasses, a security device, a monitoring device, and a visual doorbell.

For a detailed description of the camera module 300, please refer to the description of the corresponding parts of the above embodiments, which is not repeated herein.

Optionally, the display module 410 may be, but is not limited to, one or more of a liquid crystal display module, a light emitting diode display module (LED display module), a micro light emitting diode display module (micro LED display module), a sub-millimeter light emitting diode display module (MiniLED display module, mini light emitting diode display module), an organic light emitting diode display module (OLED display module), and the like.

Referring to fig. 23, the circuit board module 430 may optionally include a processor 431 and a memory 433. The processor 431 is electrically connected to the display module 410 and the memory 433, respectively. The processor 431 is configured to control the display module 410 to perform display, and the memory 433 is configured to store a program code required by the processor 431 to operate, a program code required by the display module 410 to be controlled, display content of the display module 410, and the like.

Optionally, processor 431 includes one or more general-purpose processors 431, where general-purpose processor 431 may be any type of device capable of Processing electronic instructions, including a Central Processing Unit (CPU), a microprocessor, a microcontroller, a host processor, a controller, an ASIC, and so forth. Processor 431 is configured to execute various types of digitally stored instructions, such as software or firmware programs stored in memory 433, which enable the computing device to provide a wide variety of services.

Alternatively, the Memory 433 may include a Volatile Memory (Volatile Memory), such as a Random Access Memory (RAM); the Memory 433 may also include a Non-volatile Memory (NVM), such as a Read-Only Memory (ROM), a Flash Memory (FM), a Hard Disk (HDD), or a Solid-State Drive (SSD). The memory 433 may also include a combination of memories of the above-described kinds.

Referring to fig. 21 again, the electronic device 400 of the embodiment of the application further includes a middle frame 420 and a housing 450, the housing 450 and the display module 410 are disposed at an interval, the middle frame 420 is disposed between the display module 410 and the housing 450, and a side surface of the middle frame 420 is exposed to the housing 450 and the display module 410. The middle frame 420 and the housing 100 enclose an accommodating space for accommodating the circuit board module 430 and the camera module 450. The housing 450 has a light-transmitting portion 451, and the camera module 300 can photograph through the light-transmitting portion 451 of the housing 450, that is, the camera module 300 in this embodiment is a rear camera module 300. It is understood that, in other embodiments, the light-transmitting portion 451 may be disposed on the display module 410, that is, the camera module 300 is a front camera module 300. In the schematic view of the present embodiment, the light transmitting portion 451 is illustrated as an opening, but in other embodiments, the light transmitting portion 451 may not be an opening but may be a light transmitting material, such as plastic or glass.

It should be understood that the electronic device 400 described in this embodiment is only one form of the electronic device 400 to which the lens assembly 100 is applied, and should not be construed as limiting the electronic device 400 provided in this application, nor should it be construed as limiting the lens assembly 100 provided in various embodiments of this application.

Reference in the present application to "an embodiment" or "an implementation" means that a particular feature, structure, or characteristic described in connection with the embodiment can be included in at least one embodiment of the present application. The appearances of the 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. It is explicitly and implicitly understood by one skilled in the art that the embodiments described herein can be combined with other embodiments. Furthermore, it should be understood that the features, structures, or characteristics described in the embodiments of the present application may be combined arbitrarily without contradiction between them to form another embodiment without departing from the spirit and scope of the present application.

Finally, it should be noted that the above embodiments are only used for illustrating the technical solutions of the present application and not for limiting, and although the present application is described in detail with reference to the above preferred embodiments, it should be understood by those skilled in the art that the technical solutions of the present application can be modified or substituted by equivalents without departing from the spirit and scope of the technical solutions of the present application.

Claims

1. A lens assembly, comprising:

a zoom layer disposed on the first surface of the carrier layer;

the actuator is borne on the flexible layer and used for driving the flexible layer to deform, so that the zooming layer is driven to elastically deform, and the focal length of the lens assembly is changed.

2. The lens assembly of claim 1, wherein the lens assembly has an optical axis, the first surface is convex or concave at the optical axis, and the first surface is spherical, aspherical, or free-form.

3. The lens assembly of claim 2, wherein the first surface is convex at the optical axis, the first surface having a radius of curvature R1 in a range of 20mm ≦ R1 ≦ 300 mm; or the first surface is a concave surface at the optical axis, and the range of the curvature radius R1 of the first surface is 1 mm-R1-300 mm.

4. The lens assembly of claim 1, wherein the focal length f of the lens assembly is in the range of-200 mm ≦ f ≦ -5mm, or 2mm < f ≦ 100 mm.

5. The lens assembly of claim 1, wherein the clear aperture D of the lens assembly ranges from 1.5mm ≦ D ≦ 7 mm.

6. The lens assembly of claim 1, wherein the actuator comprises a first driving assembly and a second driving assembly, the first driving assembly is disposed on the flexible layer and away from one side of the zoom layer, the second driving assembly is disposed on the flexible layer and facing one side of the zoom layer, and when the first driving assembly and at least one of the second driving assemblies are loaded with voltage, the flexible layer is driven to deform, so as to drive the zoom layer to elastically deform, thereby changing the focal length of the lens assembly.

7. The lens assembly of claim 6, wherein the lens assembly has an optical axis, the flexible layer has a second surface away from the zoom layer, and when at least one of the first driving assembly and the second driving assembly is applied with a voltage, the flexible layer is driven to deform, so as to drive the zoom layer to elastically deform, so that the second surface is spherical or aspheric, and the second surface is convex or concave at the optical axis.

8. The lens assembly of claim 7, wherein the first surface is convex at the optical axis, and wherein the second surface is spherical and convex in a direction away from the zoom layer when the first driving element is energized to generate the first electric field and the second driving element is energized to generate the second electric field; the direction of the first electric field is from the side of the first driving assembly, which is far away from the flexible layer, to the side of the first driving assembly, which is close to the flexible layer; the direction of the second electric field points from the side of the second driving assembly departing from the flexible layer to the side of the second driving assembly close to the flexible layer.

9. The lens assembly of claim 7, wherein the first surface is convex at the optical axis, and wherein when the first driving element is applied with a voltage to generate the third electric field and the second driving element is applied with a voltage to generate the fourth electric field, the second surface is aspheric and the second surface is convex at the optical axis toward a direction away from the zoom layer; the direction of the third electric field points from one side of the first driving component close to the flexible layer to one side of the first driving component away from the flexible layer; the direction of the fourth electric field points to one side of the second driving assembly close to the flexible layer from one side of the second driving assembly departing from the flexible layer.

10. The lens assembly of claim 7, wherein the first surface is convex at the optical axis, the lens assembly having a first focal length when neither the first nor the second drive assemblies are energized; when the first driving component loads voltage to generate a first electric field and the second driving component loads voltage to generate a second electric field, the lens component has a second focal length; when the first driving assembly loads voltage to generate a third electric field and the second driving assembly loads voltage to generate a fourth electric field, the lens assembly has a third focal length, and the first focal length, the second focal length and the third focal length are different from each other.

11. The lens assembly of claim 7, wherein the first surface is concave at the optical axis, and wherein when the first driving element is applied with a voltage to generate the first electric field and the second driving element is applied with a voltage to generate the second electric field, the second surface is spherical and the second surface is concave at the optical axis toward the direction of the zoom layer; the direction of the first electric field points from one side of the first driving component close to the flexible layer to one side of the first driving component away from the flexible layer; the direction of the second electric field points from one side of the second driving assembly close to the flexible layer to one side of the second driving assembly away from the flexible layer.

12. The lens assembly of claim 7, wherein the first surface is concave at the optical axis, and wherein when the first driving element is applied with a voltage to generate the third electric field and the second driving element is applied with a voltage to generate the fourth electric field, the second surface is aspheric and the second surface is concave at the optical axis toward the zoom layer; the direction of the third electric field points from the side of the first driving assembly, which is far away from the flexible layer, to the side of the first driving assembly, which is close to the flexible layer; the direction of the fourth electric field points from the side of the second driving assembly close to the flexible layer to the side of the second driving assembly away from the flexible layer.

13. The lens assembly of claim 7, wherein the first surface is concave at the optical axis, the lens assembly having a first focal length when neither the first nor the second drive assemblies are energized; when the first driving assembly loading voltage generates a first electric field and the second driving assembly loading voltage generates a second electric field, the lens assembly has a second focal length; when the first driving component loads a voltage to generate a third electric field and the second driving component loads a voltage to generate a fourth electric field, the lens component has a third focal length, and the first focal length, the second focal length and the third focal length are different from each other.

14. The lens assembly of any of claims 7-13, wherein the radius of curvature R2 of the second surface ranges from 50mm ≦ R2 ≦ 100mm when the actuator is energized.

15. The lens assembly of claim 6, wherein the first drive assembly is at least one of a piezoelectric drive assembly, an electrostrictive drive assembly, and a magnetostrictive drive assembly; the second driving component is at least one of a piezoelectric driving component, an electrostrictive driving component and a magnetostrictive driving component.

16. The lens assembly of claim 15, wherein the first drive assembly and the second drive assembly are each an annular structure, the first drive assembly and the second drive assembly are coaxially disposed, and an orthographic projection of the first drive assembly and the second drive assembly on the flexible layer at least partially overlaps, the orthographic projection of the actuator on the flexible layer being disposed around an orthographic projection outer perimeter of the zoom layer on the flexible layer.

17. The lens assembly of claim 1, further comprising a support positioned on a side of the flexible layer facing the zoom layer and disposed around an outer perimeter of the zoom layer, the support coupled to at least one of the flexible layer and the carrier layer for supporting the flexible layer.

18. The lens assembly of claim 17, wherein the carrier layer and the support are both optically transparent, the carrier layer and the support being of unitary construction.

19. An optical imaging system, comprising: the lens assembly of any of claims 1-18, said optical imaging system having an object side, said flexible layer of said lens assembly being closer to the object side of said optical imaging system than said zoom layer.

20. The utility model provides a camera module which characterized in that includes:

the optical imaging system of claim 19; and

21. An electronic device, comprising:

the camera module of claim 20, configured to capture an image;